Quarterlytics / Healthcare / Biotechnology / Harpoon Therapeutics

Harpoon Therapeutics

harp · NASDAQ Healthcare
Claim this profile
Ticker harp
Exchange NASDAQ
Sector Healthcare
Industry Biotechnology
Employees 51-200
← All annual reports
FY2019 Annual Report · Harpoon Therapeutics
Sign in to download
Loading PDF…
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

(Mark One)
☒

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2019 

or

☐

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from            to           

Commission File No. 001-38800

Harpoon Therapeutics, Inc.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)

47-3458693
(I.R.S. Employer
Identification Number)

131 Oyster Point Blvd, Suite 300
South San Francisco, CA 94080
(Address of principal executive offices)
Registrant’s telephone number, including area code: (650) 443-7400

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

Title of Each Class
Common Stock, par value $0.0001 per share

Trading Symbol(s)
HARP

Name of Each Exchange On Which Registered
NASDAQ Global Select Market

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: NONE

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ☐    No  ☒
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ☐    No  ☒
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding
12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past
90 days.    Yes  ☐    No  ☒
Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-
T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth
company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer
Non-accelerated filer
Emerging growth company

 ☐
 ☒  
 ☒

   Accelerated filer
   Smaller reporting company

 ☐
 ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised

financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YES ☐ NO ☒

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the Registrant, based on the closing price of the shares of common

stock on The Nasdaq Stock Market on June 28, 2019, was $125,747,037.

The number of outstanding shares of the Registrant’s common stock, par value $0.0001, as of February 29, 2020 was 24,944,089.

Portions of the definitive proxy statement, or the Proxy Statement, for the 2020 Annual Meeting of Stockholders of the registrant are incorporated by reference into
Part III of this Annual Report on Form 10-K. The Proxy Statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year
ended December 31, 2019

DOCUMENTS INCORPORATED BY REFERENCE

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
  
 
 
 
 
 
 
PART I

Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.
PART II
Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.

PART III

Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV

Item 15.

Item 16

TABLE OF CONTENTS

Business
Risk Factors
Unresolved Staff Comments
Properties
Legal Proceedings
Mine Safety Disclosures

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Selected Financial Data
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements With Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information

Directors, Executive Officers and Corporate Governance
Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Certain Relationships and Related Transactions, and Director Independence
Principal Accounting Fees and Services

Exhibits, Financial Statement Schedules
Exhibit Index
Form 10-K Summary
Signatures

2

Page

4
27
69
69
69
69

70
71
72
85
85
86
86
86

87
87
87
87
87

88
89
90
91

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains forward-looking statements that involve risks and uncertainties. All statements other than statements of
historical facts contained in this Annual Report on Form 10-K are forward-looking statements. In some cases, you can identify forward-looking statements
by words such as “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,”
“project,” “seek,” “should,” “target,” “will” or “would,” or the negative of these words or other comparable terminology. These forward-looking statements
include, but are not limited to, statements about:

•

•

•

•

•

•

•

•

•

•

•

•

•

the timing of the initiation, progress and expected results of our preclinical studies, clinical trials and our research and development programs;

our ability to advance product candidates into, and successfully complete, preclinical studies and clinical trials;

the timing or likelihood of regulatory filings and approvals;

the commercialization of our product candidates, if approved;

the pricing, coverage and reimbursement of our product candidates, if approved;

the implementation of our business model, strategic plans for our business and product candidates;

the scope of protection we are able to establish and maintain for intellectual property rights covering our technology platforms, including
TriTAC and ProTriTAC, and product candidates, including the projected terms of patent protection;

our ability to enter into strategic arrangements and/or collaborations and the potential benefits of such arrangements;

our ability to retain the continued service of our key executives and to identify, hire and retain additional qualified professionals;

our estimates regarding the market opportunity for our product candidates;

our estimates regarding expenses, capital requirements and needs for additional financing and our ability to obtain additional capital;

our financial performance; and

developments relating to our competitors and our industry, including competing therapies.

These forward-looking statements are based on our management’s current expectations, estimates, forecasts and projections about our business and
the industry in which we operate, and management’s beliefs and assumptions and are not guarantees of future performance or development. These forward-
looking statements are subject to a number of risks, uncertainties and assumptions, including those described under “Risk Factors” and elsewhere in this
Annual Report on Form 10-K. Moreover, we operate in a very competitive and rapidly changing environment, and new risks emerge from time to time. It is
not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or
combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these
risks, uncertainties and assumptions, the forward-looking events and circumstances discussed in this annual report may not occur and actual results could
differ materially and adversely from those anticipated or implied in the forward-looking statements.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based

on information available to us as of the date of this report. While we believe that information provides a reasonable basis for these statements, that
information may be limited or incomplete. Our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of,
all relevant information.

You should not rely upon forward-looking statements as predictions of future events. Although we believe that the expectations reflected in the

forward-looking statements are reasonable, we cannot guarantee that the future results, levels of activity, performance, or events and circumstances
reflected in the forward-looking statements will be achieved or occur. We undertake no obligation to update publicly any forward-looking statements for
any reason after the date of this report to conform these statements to new information, actual results or changes in our expectations, except as required by
law.

Unless the context otherwise requires, references in this Annual Report on Form 10-K to the “company,” “Harpoon,” “we,” “us” and “our” refer to
Harpoon Therapeutics, Inc.“TriTAC” is a registered trademark and “Harpoon Therapeutics,” “Harpoon,” the Harpoon logo and ProTriTAC are
trademarks, all owned by Harpoon Therapeutics, Inc.  This report also contains trademarks and trade names that are property of their respective owners.

3

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 1. Business

Overview

PART I

We are a clinical-stage immunotherapy company developing a novel class of T cell engagers that harness the power of the body’s immune system to

treat patients suffering from cancer and other diseases. T cell engagers are engineered proteins that direct a patient’s own T cells to kill target cells that
express specific proteins, or antigens, carried by the target cells. Using our proprietary Tri-specific T cell Activating Construct, or TriTAC, platform, we are
developing a pipeline of novel T cell engagers, or TriTACs, initially focused on the treatment of solid tumors and hematologic malignancies. Since
commencing operations in 2015, we have created four TriTAC product candidates, two of which are in the clinic and two of which we expect to begin
clinical development in 2020.

A summary of our four TriTAC product candidates is as follows:

•

•

•

•

HPN424, currently in the dose-escalation portion of a Phase 1 clinical trial for the treatment of metastatic castration-resistant prostate cancer, or
mCRPC. We expect to present interim dose-escalation data at the American Society of Clinical Oncology Meeting, also known as ASCO, at the
end of May 2020.

HPN536, currently in the dose-escalation portion of a Phase 1/2a clinical trial for the treatment of ovarian and pancreatic cancers and other
mesothelin-, or MSLN-, expressing solid tumors. We anticipate providing interim data from this trial in the second half of 2020.

HPN217, for which in November 2019 we submitted an IND to the U.S. Food and Drug Administration, or FDA, for the treatment of multiple
myeloma, as well as entered into a Development and Option Agreement with AbbVie Biotechnology Ltd., or AbbVie.  Under our agreement with
AbbVie, we have already received an upfront payment of $30 million and anticipate receiving a cash milestone payment of up to $50 million
upon dosing the first patient in the Phase 1/2 clinical trial for HPN217 within a specified time period, which we expect to occur in the first half of
2020.  Additionally, we are eligible to receive future payments totaling up to $430 million upon AbbVie’s exercise of an exclusive license option
and achievement of certain development, regulatory, and commercial milestones, in addition to receipt of royalties on commercial sales. We are
responsible for conducting the Phase 1/2 clinical trial of HPN217 under our agreement with AbbVie.

HPN328, currently in preclinical development to initially treat small cell lung cancer, or SCLC, a DLL3-expressing tumor. We anticipate filing an
IND for HPN328 by mid-year 2020 and initiating a Phase 1/2a clinical trial in the second half of 2020.

Our TriTACs are designed to advance the therapeutic potential of T cell engagers, a therapeutic approach with an established and proven mechanism

of action. The first bi-specific T cell engager, or BiTE, to be approved by the FDA was Amgen’s Blincyto. Blincyto was approved in 2014 as a
monotherapy for the treatment of acute lymphoblastic leukemia. Since then, other BiTEs have shown promising therapeutic potential in clinical trials. We
developed our proprietary TriTAC platform to incorporate the strengths of BiTEs and improve upon their critical shortcomings, such as a short half-life. We
believe our TriTAC platform offers the following features for the discovery and development of novel immunotherapies to treat a wide array of diseases,
including cancer:

•

•

•

•

•

Active at Low Levels of Target Expression.    We designed TriTACs to be active at low levels of antigen expression where other treatment
modalities lose efficacy. In our preclinical studies, TriTACs did not require high levels of target antigen expression to engage T cells to kill
disease cells.

MHC Independence.    We designed TriTACs to specifically direct T cells to kill target cells independent of major histocompatibility
complex, or MHC expression. Tumor cells frequently acquire mutations that change the MHC molecule or reduce the level of MHC
expressed on their surfaces, thus making the tumor cells less susceptible to being killed by either endogenous T cells or engineered T cells
that require MHC recognition. We believe that because TriTACs do not require a T cell clone with specific T cell receptor or MHC
recognition to kill tumor cells, they will be able to generate greater and more durable therapeutic responses than MHC dependent approaches.

Extended Half-Life and Stability.    We designed TriTACs to be stable in the bloodstream and to have a long-serum half-life in order to
achieve efficacy without requiring the continuous IV administration that is a limiting requirement of other T cell engagers, such as BiTEs.

Small Size and Tissue Penetration.    TriTACs are small in size, and we believe this is critical for their efficient penetration of, and diffusion
within, solid tumors.

Modularity.    The TriTAC structure is modular and its antigen binding domain can easily be switched out to enable the rapid discovery and
development of new TriTAC product candidates across a wide variety of targets.

4

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
•

•

Safety Design Elements.    We designed TriTACs to enable T cell engagement while minimizing off-target toxicity and the potential for CRS,
which is a potentially lethal reaction of the body to the hypersecretion of inflammatory cytokines.

Conventional Manufacturing.    TriTACs are “off-the-shelf” therapies, the manufacturing of which is significantly less complex than that of
personalized or cell-based therapies.

We seek to selectively collaborate with leading biopharmaceutical companies to leverage our technology platforms. For example, in November 2019

we entered into a Development and Option Agreement with AbbVie, pursuant to which we granted to AbbVie an option to license worldwide exclusive
rights to HPN217. We will be responsible for developing HPN217 through a Phase 1/2 clinical trial. Upon exercise of the option, which AbbVie may
exercise following delivery by the Company of a specified data package arising from the Phase 1/2 trial, AbbVie would be responsible for all future clinical
development, manufacturing and commercialization activities. The Development and Option Agreement represents a potential transaction value of up to
$510 million in upfront, option and milestone payments, of which $30 million has been received to date, plus royalties on potential global commercial
sales.

In addition, in November 2019, we expanded our existing collaboration with AbbVie by entering into an Amended and Restated Discovery
Collaboration and License Agreement, or the Restated Collaboration Agreement, which agreement amends and restates the Discovery Collaboration and
License Agreement we had entered into with AbbVie in October 2017, or the Original Collaboration Agreement. The expansion of the collaboration grants
to AbbVie the right to select two additional targets and an option to select up to four further targets, in addition to the two targets previously selected by
AbbVie under the Collaboration Agreement. Consistent with the Collaboration Agreement, we and AbbVie will conduct certain initial research and
discovery activities for each designated target, after which AbbVie will be solely responsible for further development and commercialization efforts. We
have received a total of $37 million of upfront payments under this collaboration to date. In addition, we are eligible to receive up to an aggregate of $2.4
billion in potential development, regulatory and commercial milestone payments under the Restated Collaboration Agreement, plus royalties on global
commercial sales.

Our Pipeline

We are leveraging our proprietary TriTAC and ProTriTAC platforms to discover and develop product candidates to treat cancer and other diseases.
The following table summarizes key information about our product candidates to date, all of which were developed using our TriTAC platform. We own
the intellectual property rights to both our TriTAC and ProTriTAC platforms and the underlying critical components of our product candidates.

5

 
 
 
 
 
Our Strategy

Our strategy is to harness innovations in immunotherapy and protein engineering to rapidly advance our novel TriTAC product candidates through
clinical development, regulatory approval and commercialization, with an initial focus on cancer. This strategy encompasses the following key elements:

•

•

•

•

Advance our TriTAC product candidates directed at clinically validated targets from discovery through clinical development and regulatory
approval.      We have developed a robust and efficient internal research effort that is focused on advancing a portfolio of therapeutic product
candidates from initial discovery through clinical development, and ultimately, to treat patients suffering from cancer. We have discovered and
advanced four product candidates to treat solid and hematologic malignancies, two of which are currently in the clinic. We expect to advance our
third and fourth programs into the clinic in 2020. These programs are directed against targets that are both clinically validated and which are
ideally suited for our TriTAC platform due to limited expression on healthy tissue.

Expand the pipeline of oncology candidates for our TriTAC technology platform and develop other novel platforms.      Our current research
efforts are focused on evaluating potential new product candidates based on our TriTAC technology. In addition, we are actively exploring new
technologies, which may improve the safety of certain therapeutic approaches or expand our ability to address therapeutic targets with increased
specificity to diseased tissues.

Leverage our novel technology platforms to target a broad range of disease.    Our TriTAC and other platforms may have the ability to address
disease targets outside of oncology. We intend to evaluate opportunities to expand our research to other therapeutic areas, such as autoimmune
diseases and anti-infectives either internally or through strategic partnerships.

Selectively collaborate with leading biopharmaceutical companies to leverage our platforms, expand our portfolio, advance our product
candidates and maximize their commercial potential.    While we intend to retain significant ownership of our current pipeline product
candidates, we recognize the benefits of collaborations.  We seek collaborations that can:

1) Broaden the reach of our technology platforms to other novel targets in oncology or other areas that are not a focus for our

company. For example, we entered into a collaboration with AbbVie in October 2017, which was expanded in November 2019,
that widens the utility for our TriTAC platform by developing candidates against novel soluble T cell receptor, or TCR, and
antibody targets for the treatment of cancer.  

2)

Provide us with strategic access to clinical and commercial capabilities, particularly in geographic areas we are unlikely to pursue
on our own. For example, multiple myeloma is an indication with several therapeutic approaches competing both clinically and
commercially.  AbbVie has an extensive presence in hematologic malignancies, including multiple myeloma, which can benefit us
as we develop a clinical plan that best positions HPN217 for commercial success.

3) Expedite commercial presence and distribution of our products, if approved.  Utilizing an existing commercial marketing and

distribution organization may be more cost effective in certain indications and geographies we are pursuing, rather than building
our own commercial infrastructure.     

Our TriTAC Platform

Our proprietary TriTAC platform offers the potential to develop drugs that could dramatically change the way in which we combat a variety of
diseases. It is well accepted that the immune system can be harnessed to eradicate and prevent the proliferation of cancer cells. Recent successes using
immunologic approaches have revealed methods of modulating a cancer patient’s immune system to battle the growth and spread of tumors. In most cases,
T cells have been central to this approach, and the pathways to unleash the tumor-killing properties of T cells have resulted in multiple recent drug
approvals.

We believe our TriTACs represent the evolution of a validated cancer-killing modality that engages T cells to kill tumors. The first approved T cell

engager, a BiTE developed by Amgen and marketed as Blincyto, was approved in 2014 for the treatment of acute lymphoblastic leukemia. With our
TriTAC platform, we set out to design a T cell engager that incorporates the strengths of BiTEs (including small size and activity at low levels of antigen
expression) and improves upon their critical shortcomings (including short half-life and limited stability).

6

 
 
 
 
 
 
 
 
 
We designed our TriTAC product candidates with three primary components: a CD3 binding domain for T cell engagement, a proprietary half-life

extension domain and an antigen-bonding domain. TriTACs consist of a single-chain polypeptide designed to bind to a cancer surface antigen, human
serum albumin and the CD3 epsilon subunit of the TCR. Tumor-targeting and albumin-binding are achieved by single domain antibodies, or sdAbs, while
CD3 is bound by a single-chain variable fragment, or scFv. When TriTACs simultaneously bind cell surface antigens and T cells, they induce the formation
of a cytolytic synapse that mimics the natural interaction between TCRs and MHCs. This interaction activates T cells to kill target cells, as demonstrated in
the figure below.

Our TriTAC Product Candidates

HPN424: PSMA-targeting TriTAC

We are developing our lead TriTAC product candidate, HPN424, for the treatment of prostate cancer. HPN424 targets PSMA, a protein for which

expression is largely restricted to both normal and malignant prostate-derived cells. HPN424 provides a differentiated mechanism of action compared to the
current standard of care, as this targeted approach is designed to safely engage and direct T cells to kill cancer cells. In April 2019, data presented at the
American Society of Clinical Oncology demonstrated the encouraging clinical responses of Amgen’s BiTE targeting PSMA in mCRPC patients. However,
this product candidate, AMG212, requires continuous IV infusion, which could limit its adoption and accessibility.

In January 2019, we announced preliminary data from seven patients who had been enrolled in our Phase 1 clinical trial of HPN424, our lead
TriTAC product candidate, as of December 31, 2018, which preliminary data supports the proposed mechanism of action of HPN424. We expect to present
interim dose-escalation data at ASCO, at the end of May 2020, and expect to initiate an expansion cohort in 2020.

Market Opportunity

The Surveillance, Epidemiology and End Results Program of the National Cancer Institute, or SEER, estimates that there will be over 175,000 new

diagnoses and over 32,000 deaths as a result of prostate cancer in the United States in 2019. Prostate cancer is expected to have the third-highest cancer
incidence rate in 2019 and is the second leading cause of male cancer death in the United States.

7

 
 
 
 
 
While the five-year survival rate of local and regional prostate cancer is nearly 98%, more aggressive forms of the disease, of which approximately

23% are initially diagnosed, have a five-year survival rate of approximately 30%. While these more aggressive forms of prostate cancer can initially be
treated, nearly all of these patients experience a recurrence in tumor growth that results in the subsequent development of mCRPC. Nearly all prostate
cancer-specific deaths occur after patients develop mCRPC, for which the median overall survival period is only 13 months. Later-generation anti-androgen
drugs such as Johnson & Johnson’s Zytiga and Pfizer’s/Astellas’ Xtandi have widely become the standard of care and generated combined global sales of
over $5 billion in 2017. While these therapies have addressed a portion of the population, there remains a significant need for treatments that offer a novel
mechanism of action with the potential to modify or cure the disease.

Clinical Development Plan

In August 2018, we initiated a Phase 1, multicenter, open-label dose escalation and dose expansion trial of the safety, tolerability and

pharmacokinetics of HPN424 in mCRPC patients. Eligible patients must have mCRPC, have received at least two prior treatment regiments for mCRPC
and have evidence of disease progression on the most recent systemic treatment regimen.  The dose escalation phase is currently using a 3+3 design with
dose cohorts that enroll three to six patients per cohort. The trial is designed to determine the maximum tolerated dose and a recommended Phase 2 dose.
Our primary objective is to assess safety and tolerability at increasing dose levels. Our secondary objectives include pharmacokinetics and
pharmacodynamics, as well as preliminary potential anti-tumor activity and biomarker data. We continue to enroll patients in the dose-escalation portion of
the clinical trial. We expect to present interim dose-escalation data at ASCO, at the end of May 2020. In addition, we plan to initiate an expansion cohort in
2020.  

Phase 1 Preliminary Results

In January 2019, we announced preliminary data from seven patients in our ongoing dose escalation study, treated at doses ranging from 1.3 to 24
ng/kg, as of December 31, 2018, which supports the proposed mechanism of action of HPN424. All seven patients were treated previously with a second-
generation anti-androgen therapy. From those seven patients, we noted preliminary pharmacokinetic analysis supports weekly dosing, T cell engagement
via transient and dose-dependent increases in peripheral cytokines and chemokines and a reduction in circulating tumor cells, or CTC, in several of the
evaluable patients. Adverse events were consistent with the expected mechanism of action, with three patients reporting grade 2 rigors or fevers that were
manageable. One patient from the fourth cohort experienced what was initially categorized as a grade 3 CRS event (rigors and hypotension), which
resolved within eight hours of dosing. This patient was re-administered HPN424 consistent with protocol guidelines. The patient experienced no further
reactions. No dose limiting toxicities had been observed, with four dose levels tested.  In August 2019, we provided an update on our HPN424 trial that
focused on our experience in managing cytokine-related events.  Consistent with the TriTAC mechanism of action, we had observed adverse events
associated with T cell activation and cytokine induction, which prompted us to explore the use of dexamethasone as a premedication to limit potential
adverse events. We had found that the addition of weekly dexamethasone premedication, tapered over several weeks, had successfully limited adverse
events. Several patients had completed the scheduled taper and had successfully continued treatment with HPN424 in the absence of dexamethasone.

HPN536: MSLN-Targeting TriTAC

We are developing HPN536 for the treatment of ovarian cancer and other MSLN-expressing tumors, which include mesothelioma, pancreatic

carcinoma, non-small cell lung carcinoma, or NSCLC, and triple-negative breast cancer, or TNBC, among others. HPN536 targets MSLN, a cell-surface
protein whose normal expression is largely restricted to mesothelial cell layers lining certain organs. MSLN is attractive for target-based therapeutics
because it is expressed on a wide variety of tumor cells but has limited expression in normal tissue. Early signs of clinical efficacy generated by other
treatment modalities have validated MSLN as an attractive tumor target, but therapies with improved efficacy are required to treat MSLN-expressing
tumors. In 2018, we completed an IND-enabling, multi-dose GLP toxicology study in animals. HPN536, which has been observed to bind to cynomolgus
monkey MSLN with comparable affinities as human MSLN, delivered clear histological evidence of target engagement. In April 2019, we initiated a
Phase 1/2a, multicenter, open-label dose escalation and dose expansion trial of the safety, tolerability and pharmacokinetics of HPN536 and are actively
recruiting patients with ovarian and pancreatic cancer in the dose-escalation portion of the trial. We expect to present interim data from this trial in the
second half of 2020.

8

 
Market Opportunity

MSLN-expressing tumors include ovarian cancer, NSCLC, pancreatic carcinoma, mesothelioma and TNBC, among others. While MSLN is found in

approximately 30% of all cancers, these specific cancers have particularly high levels of MSLN expression. The following table shows the MSLN
expression level of, and the number of patients diagnosed in the United States in 2019 with, each of these cancers:

Cancer Type
Ovarian Cancer
Non-Small Cell Lung Cancer
Pancreatic Carcinoma
Mesothelioma
Triple Negative Breast Cancer

Represents MSLN expression levels across all lung cancer types.
*
**
Calculated as 15% of SEER-estimated breast cancer incidence.
*** Calculated as 80-85% of SEER-estimated lung cancer incidence

New Patients Diagnosed
in the United States
22,500
200,000
57,000
2,600
40,000

  *** 

  **  

MSLN Expression
Level (%)
60-65
60-65 *
80-85
85-90
34-42

Ovarian cancer is the fifth leading cause of cancer-related death among women in the United States and is the deadliest of gynecologic cancers with
more than 70% of patients diagnosed with an advanced stage and over 14,000 patients dying from the disease each year. According to SEER, the five-year
survival rate for women diagnosed with ovarian cancer is approximately 47%. NSCLC is the most common type of lung cancer, estimated to comprise 80-
85% of all lung cancer diagnoses. The five-year survival rate for late-stage NSCLC is about 10%. Pancreatic cancer is one of the most fatal cancers in the
world. In 2016, the seven major markets (the United States, France, Germany, Italy, Spain, the United Kingdom and Japan) saw 149,780 new cases of
pancreatic cancer and in 2019, there were approximately 57,000 new cases in the United States. SEER estimates that fewer than 9% of patients diagnosed
with pancreatic cancer survive five years. Mesothelioma is a rare and aggressive cancer that affects the lining or membrane that covers and protects certain
organs in the body. Effective treatment options for patients with mesothelioma are very limited. TNBC is referred to as “triple-negative” because it is ER-,
PR- and HER2-, and is unlikely respond to hormonal or HER2-targeted therapies. TNBC accounts for 10-20% of all breast cancers and is more aggressive
and likely to recur compared to receptor-positive breast cancers. The five-year survival rate for TNBC is 77% as compared to 93% for other types of breast
cancers.

Clinical Development Plan

In April 2019, we initiated a Phase 1/2a, multicenter, open-label dose escalation and dose expansion trial of the safety, tolerability and
pharmacokinetics of HPN536 and are actively recruiting patients with ovarian and pancreatic cancer. The study consists of two phases, an initial dose
escalation phase with ovarian and pancreatic cancer patients, followed by an expansion phase of up to three additional parallel cohorts of 20 patients each
with ovarian, pancreatic and mesothelioma cancer. We are collecting data to evaluate the safety, tolerability, pharmacokinetics, pharmacodynamics and
preliminary clinical activity of HPN536. The dose escalation phase is designed to determine the maximum tolerated dose and a recommended Phase 2 dose.
Once a recommended Phase 2 dose is determined, we expect to initiate the dose expansion phase with three parallel 20-patient cohorts, conducted
according to a Simon 2-stage design. The cohorts will be indication-specific, and we expect to enroll patients with ovarian cancer, mesothelioma and
pancreatic carcinoma. We expect to present interim data from the dose escalation portion of this trial in the second half of 2020.

HPN217: BCMA-Targeting TriTAC

We are developing HPN217 for the treatment of multiple myeloma. HPN217 targets BCMA, a clinically validated target. BCMA is a tumor necrosis

factor receptor super family member and is a receptor protein expressed on nearly all multiple myeloma cells. Early data from CAR-T and ADC have
clinically validated the target.

9

 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
 
 
 
   
 
 
 
 
 
In November 2019, we entered into an exclusive worldwide Development and Option Agreement with AbbVie for HPN217. Under the terms of the

agreement, we granted to AbbVie an option to license worldwide exclusive rights to HPN217. We will be responsible for agreed-upon development
activities of HPN217 through an initial Phase 1/2 clinical trial. Upon exercise of the option, AbbVie will be responsible for all future clinical development,
manufacturing and commercialization activities. AbbVie may exercise its license option at any time during a period commencing on the effective date of
the agreement and expiring after a specified period following delivery by us of a specified data package arising from the first Phase 1/2 trial for the
HPN217 product. AbbVie paid an upfront payment of $30 million and we expect to receive a development milestone payment of up to $50 million upon
dosing the first patient in the Phase 1/2 clinical trial within a specified time period, which we expect to occur in the first half of 2020. If AbbVie exercises
its option, AbbVie will pay us an option exercise fee of $200 million, and potential future payments of $230 million for the achievement of certain
development, regulatory and commercial sales milestones for HPN217 Product along with high single-digit to very low double-digit royalties on
commercial sales.

Market Opportunity

Multiple myeloma is a type of blood cancer formed by the accumulation of malignant plasma cells in the bone marrow, crowding out normal plasma

cells that play an important role in the immune system. Multiple myeloma is the second most prevalent blood cancer after Non-Hodgkin’s lymphoma.
There are approximately 229,000 people living with myeloma worldwide, with 114,000 new cases diagnosed and 87,000 deaths each year. The American
Cancer Society estimates that approximately 32,000 new cases will be diagnosed and approximately 13,000 deaths are expected to occur from multiple
myeloma in the United States in 2020. Despite advances in the treatment of multiple myeloma over the past decade, we believe there remains a significant
unmet need as the five-year survival rate is only approximately 50%.

10

 
 
HPN328: DLL3-Targeting TriTAC

We are developing HPN328 for the treatment of SCLC. DLL3 is a protein highly expressed in a majority of SCLC tumors and cancer stem cells, but

not expressed in normal tissue. This selective expression makes DLL3 an attractive drug target for T cell engagers. We are currently conducting IND-
enabling studies and expect to file an IND for HPN328 by mid-year 2020 and to initiate a Phase 1/2a clinical trial of HPN328 in the second half of 2020.

Market Opportunity

Approximately 30,000 patients are diagnosed with SCLC annually in the United States, representing 10-15% of lung cancer diagnoses. The five-

year relative survival rate for patients with Stage I, II, III and IV SCLC is approximately 31%, 19%, 8% and 2%, respectively. The recent approval of
Opdivo, a T cell-targeting checkpoint inhibitor developed by BMS, supports immunotherapy as a new treatment alternative for SCLC. We believe there is
still a significant unmet need remains for new therapies for these patients.

Preclinical Data

In October 2019, we presented data on HPN328 for the treatment of small cell lung cancer at the AACR-NCI-EORTC International Conference on
Molecular Targets and Cancer Therapeutics. HPN328 was well-tolerated in cynomolgus monkeys at 1 and 10 mg/kg and pharmacokinetic data support the
potential for once-weekly dosing.

Our ProTriTAC Platform

ProTriTAC—An Expansion of TriTAC’s Capabilities

In order to expand the universe of addressable targets and indications, we are actively developing our proprietary ProTriTAC platform. Our
ProTriTAC platform applies a prodrug concept to create a therapeutic T cell engager that remains inactive until it reaches the tumor. ProTriTACs therefore
have the potential for additional tumor specificity and enhanced safety profiles because they are designed to have limited interaction with their molecular
targets in healthy tissue, allowing us to target tumor-associated antigens that may be more broadly expressed. When a ProTriTAC penetrates a tumor,
tumor-associated proteases cleave off the blocking domain of the ProTriTAC, thereby enabling the engagement of T cells to subsequently kill tumor cells.
This activation process also diminishes the half-life of the resulting T cell engager so active molecules that leave the tumor are rapidly eliminated from
circulation without causing off-tissue side effects.

Collaboration and License Agreements

Development and Option Agreement with AbbVie Biotechnology

On November 20, 2019, we entered into a Development and Option Agreement with AbbVie in connection with our HPN217 program, which

targets B cell maturation antigen, or BCMA. Pursuant to such Agreement, we granted to AbbVie an option to a worldwide, exclusive license under our
patents and know-how applicable to the HPN217 program to develop, manufacture and commercialize products arising from the HPN217 program
targeting BCMA, or HPN217 Products. Under the Development and Option Agreement, we will file an IND for HPN217 and conduct development
activities pursuant to a mutually-agreed development plan, including conducting a Phase 1/2 clinical trial of HPN217, in order for AbbVie to determine
whether it wishes to exercise its option to take a worldwide, exclusive license to such HPN217 program.

11

 
 
 
 
Under the Development and Option Agreement, AbbVie may exercise its license option at any time during a period commencing on the effective

date of the agreement, and expiring after a specified period, following delivery by us of a specified data package arising from the first Phase 1/2 trial for the
HPN217 Product. Following AbbVie’s exercise of its option, and except for completion of certain development activities by us under the development plan,
AbbVie will be solely responsible, at its cost, for the development, manufacture and commercialization of HPN217 Product. AbbVie is required to use
commercially reasonable efforts to develop and obtain regulatory approval for one HPN217 product, for at least one indication, for use in each Major
Market (as defined in the Development and Option Agreement).

AbbVie paid an upfront payment of $30 million, and we expect to receive a development milestone payment of up to $50 million, upon dosing the
first patient in the Phase 1/2 clinical trial within a specified time period, which we expect to occur in the first half of 2020. If AbbVie exercises its option,
AbbVie will pay us an option exercise fee of $200 million.  Following option exercise, AbbVie will be required to make further payments to us of up to
$230 million in the aggregate for the achievement of specified development, regulatory and commercial sales milestones for HPN217 Products. We will
also receive tiered royalties on net sales by AbbVie, its affiliates and sublicensees of HPN217 Products at percentages ranging from the high single digits to
the very low double digits, subject to specified offsets and reductions. Royalties will be payable under the Development and Option Agreement on a
product-by-product and country-by-country basis commencing on the date of first commercial sale of each HPN217 Product, and ending on the later of
expiration of all valid claims of specified licensed patents in such country, expiration of regulatory exclusivity in such country, or ten years following first
commercial sale of such HPN217 Product in such country.

The Development and Option Agreement will terminate upon the date of the expiration of all AbbVie’s royalty payment obligations in all countries,

or upon expiration of the license option period and the failure of AbbVie to exercise its license option. The Development and Option Agreement may be
terminated by either party immediately for the insolvency of the other party or on 90 days’ written notice for an uncured material breach of the
Development and Option Agreement by the other party. AbbVie may also terminate the Development and Option Agreement in its entirety or on a country-
by-country basis for any reason on 90 days’ written notice to us.

Amended and Restated Discovery Collaboration Agreement with AbbVie Biotechnology

On November 20, 2019, we entered into an Amended and Restated Discovery Collaboration and License Agreement, or the Restated Collaboration
Agreement, with AbbVie, which agreement amends and restates the Discovery Collaboration and License Agreement entered into between us and AbbVie,
dated October 10, 2017 and amended April 3, 2019, or the Original Collaboration Agreement.  Pursuant to the Original Collaboration Agreement, we
granted to AbbVie worldwide exclusive rights to develop and commercialize products that incorporate our proprietary TriTAC technology together with
soluble TCRs provided by AbbVie that bind to targets accepted by the parties. Under the terms of the Original Collaboration Agreement, AbbVie had the
right to designate up to two targets for development of TriTAC constructs, which it selected in 2017 and 2019, respectively. Pursuant to the Restated
Collaboration Agreement, the worldwide, exclusive license granted to AbbVie under the Original Collaboration Agreement to develop and commercialize
products that incorporate our proprietary Tri-specific T-cell Activating Construct, or TriTAC, platform technology together with soluble T cell receptors, or
TCRs, provided by AbbVie has been expanded to cover products that incorporate antibodies provided by AbbVie or by us. The expansion of the
collaboration also allows AbbVie to designate up to six additional targets, selected during a specified period following the effective date, to be the subject
of activities under the collaboration. During a period of up to four years following the date of AbbVie’s designation of each target for the products, and
confirmation of target availability, we and AbbVie will conduct certain research and discovery activities under a mutually agreed discovery and research
plan in connection with the creation and evaluation of constructs comprising our proprietary TriTAC technology, in conjunction with the soluble TCR or
antibody sequences directed at the agreed upon targets of interest. We may not, including through any third party, develop or commercialize any competing
product that binds to any of the included targets. As was the case under the Original Collaboration Agreement, following the discovery phase, AbbVie will
be solely responsible, at its cost, for the development, manufacture and commercialization of the products that arise from the activities under the discovery
plan. AbbVie is required to use commercially reasonable efforts to develop and commercialize one such product directed to each target for which the
discovery activities were completed in each Major Market (as defined in the Restated Collaboration Agreement).

12

 
In addition to the upfront payment of $17 million already paid under the Original Collaboration Agreement, under the Restated Collaboration

Agreement, we received an upfront payment of $20 million for AbbVie’s right to select two additional targets and an option to select up to four further
targets. AbbVie will be required to make payments to us, upon target selection, of $10 million for each target, up to four further targets selected by AbbVie.
For each of the up to eight targets selected, we will receive up to $300 million in the aggregate for the achievement of specified development, regulatory
and commercial sales milestones for licensed products indicated for human therapeutic or prophylactic use, totaling up to $2.4 billion in the aggregate, if
such licensed products are successfully progressed against all-included targets and indications. We will also be eligible to receive tiered royalties on net
sales by AbbVie, its affiliates and sublicensees of licensed products at percentages in the mid-single digits, subject to specified offsets and reductions.
Royalties will be payable under the Restated Collaboration Agreement on a product-by-product and country-by-country basis commencing on the date of
first commercial sale of each product, and ending on the later of expiration of all valid claims of specified licensed patents in such country, expiration of
regulatory exclusivity in such country or ten years following first commercial sale of such product in such country.  If licensed products are developed and
commercialized for diagnostic or veterinary use, or certain screening or monitoring uses, the parties have agreed to negotiate an appropriate reduction in the
economic terms applicable to such non-therapeutic and prophylactic applications.

The Restated Collaboration Agreement will terminate upon the date of the expiration of all AbbVie’s royalty payment obligations in all
countries.  The Restated Collaboration Agreement may be terminated by either party immediately for the insolvency of the other party or on 90 days’
written notice for an uncured material breach of such agreement by the other party.  AbbVie may also terminate the Restated Collaboration Agreement in its
entirety or on a target-by-target or country-by-country basis for any reason on 30 days’ written notice to the Company. In addition, AbbVie may terminate
the Restated Collaboration Agreement immediately in its entirety or on a target-by-target basis if AbbVie considers in good faith that there has been a
failure of the discovery or development efforts with respect to such target, or that further development or commercialization of products directed to such
target is not advisable as a result of a serious safety issue.

License Agreement with Werewolf Therapeutics, Inc.

In March 2018, we entered into an assignment and license agreement, or the Werewolf Agreement, with Werewolf Therapeutics, Inc., or Werewolf,
a portfolio company of MPM Capital, Inc., a holder of more than 5% of our capital stock. Dr. Luke Evnin, the Chairman of our Board, is also the Chairman
of the board of directors of Werewolf. Under the Werewolf Agreement, we assigned certain patents that relate to certain inducible polypeptides (and
binding moiety for conditional activation of certain polypeptides) to Werewolf and granted to Werewolf a non-exclusive, royalty-bearing, sublicenseable
license under certain other patents owned by us and relating to certain proteins, to make, use and commercialize products that are covered by such patents
in the field of molecules comprising a certain polypeptide. Werewolf assigned certain patents to us relating to adoptive cell therapies and binding moieties
for conditional activation of immunoglobulin and non-immunoglobulin molecules. Under the Werewolf Agreement, Werewolf paid us an upfront fee of
$0.5 million. If Werewolf commercializes products covered by the licensed patents, then beginning on the first sale of such products, Werewolf will be
obligated to pay to us a royalty on net sales of such products by Werewolf, its affiliates and licensees at a percentage in the low single digits, subject to an
obligation to make a minimum annual royalty payment at an amount in the low hundreds of thousands of dollars.

In December 2019, we and Werewolf amended the Werewolf Agreement by entering into a Second Amended and Restated Assignment and License

Agreement, or the Amended Werewolf Agreement, to include the grant to Werewolf of an exclusive, royalty-bearing, sublicensable license under certain
patents owned by us and relating to certain proteins, to make, use, and commercialize products that are covered by such patents in the field of molecules
comprising a certain protein.  This license provides Werewolf with certain rights to enforce and defend these licensed patents.  If Werewolf commercializes
products covered by these licensed patents, then beginning on the first sale of such products, Werewolf will be obligated to pay to us a royalty on net sales
of such products by Werewolf, its affiliates and licensees at a percentage in the low single digits, and this royalty cannot be added to any other royalty owed
to us under the Amended Werewolf Agreement.  In addition, each party granted to the other a non-exclusive, royalty-free, sublicensable, perpetual license
under certain other patents relating to a certain binding domain of a certain protein, to make, use, and commercialize products that are covered by such
patents in a field defined by a certain type of molecule for each party. The Amended Werewolf Agreement also includes a mutual release of claims
regarding certain patent prosecution matters.

Royalties on net sales will be recognized when the underlying sales occur. No royalty revenue was recognized under the Werewolf Agreement as of

December 31, 2019.

13

 
Asset Transfer Agreement with Maverick Therapeutics, Inc.

In December 2016, we entered into an asset transfer agreement, or the Asset Transfer Agreement, with Maverick Therapeutics, Inc., or Maverick.

Under the Asset Transfer Agreement, we transferred one provisional patent application (and any subsequently filed patent applications that claim priority to
the provisional patent application) and certain know-how to Maverick solely for use in connection with a specific type of conditionally active T cell
engagers having an activation mechanism that we believe is not used by the T cell engagers that are incorporated in the products that we are developing
(such permitted use by Maverick, the Maverick Field), and Maverick assumed liabilities from us relating to this transferred intellectual property and other
transferred assets. Maverick granted back to us a royalty-free, non-exclusive, sublicenseable license under this transferred intellectual property for use in all
fields outside of the Maverick Field, which include all fields in which we are developing products. We further granted Maverick royalty-free, exclusive and
non-exclusive licenses to certain other patents that we own, in all cases solely for use in the Maverick Field. In consideration for our transfer and license of
such intellectual property, Maverick issued a promissory note to us in the amount of $6.8 million, which we collected in full in January 2017, and all of its
outstanding capital stock, which we then spun-off to our stockholders (such distribution, the “Distribution”). The Asset Transfer Agreement includes a
covenant not to compete, which provides that we will not directly or indirectly research, develop, manufacture or commercialize products in the Maverick
Field until December 2020. The Asset Transfer Agreement is not terminable and all rights transferred or licensed by a party to the other party under the
Asset Transfer Agreement are irrevocable.

We are involved in significant litigation with Maverick regarding a dispute relating to our ProTriTAC program that arose under the Asset Transfer

Agreement. For more information, see “Item 3. Legal Proceedings” elsewhere in this Form 10-K.

Agreements with AGC Biologics, Inc.

In October 2015, we entered into the AGC License Agreement with AGC, pursuant to which AGC granted us a non-exclusive, worldwide license

under its proprietary Chinese hamster EF-1 protein expression technology, or the CHEF1 Technology, which is used in connection with the manufacturing
process for HPN424, HPN536 and our other current preclinical product candidates, or collectively, the Products, for use in connection with our
development of the Products, including our clinical trials. Subsequently, in July 2016, we entered into a development and manufacturing services
agreement with AGC, or the Manufacturing Agreement, under which AGC conducts cGMP manufacturing of the Products utilizing the CHEF1
Technology. Under the terms of the AGC License Agreement, we have an option, exercisable for each Product, to be granted a non-exclusive license to use
the CHEF1 Technology in connection with the commercialization of such Product for human therapeutics or diagnostics. If we exercise such option during
a specified period, we will make a one-time upfront payment in the mid tens of thousands of dollars to AGC (solely in connection with the first Product)
for such commercial license for the first Product, or if we exercise such commercial option after the expiration of such period, our commercial license will
be subject to the payment of a higher option exercise fee.

We retain the right, at any time, to manufacture the Products using the CHEF1 Technology ourselves, or through an affiliate or third-party

manufacturer for development purposes, and subject to exercising our commercial option, for commercialization purposes.

Under the terms of our agreements with AGC, so long as AGC is the exclusive manufacturer of our Products, we will not owe AGC any milestone

or royalty payments to AGC under the AGC License Agreement for the use of the CHEF1 Technology. However, if AGC is no longer our exclusive
manufacturer for the Products, and we still use the CHEF1 Technology, we will owe AGC specified development and regulatory milestones of up to
$350,000 per Product, and a royalty on net sales of Products of less than 1%, payable for the longer of ten years from first commercial sale of such Product,
or the expiration of the patent rights in the CHEF1 Technology covering such Product in the relevant country, subject to a reduction in the event of no
patent coverage. If we are not using AGC as our exclusive manufacturer of a given Product, such that we owe a royalty to AGC, we have an option,
exercisable at any time prior to the end of the first royalty period in which a royalty is due for such Product, to buy out our royalty obligations in lieu of an
ongoing royalty payment, by making a one-time payment to AGC in a dollar amount in the mid-single digit millions.

The Manufacturing Agreement can be terminated by either party in the event of an uncured material breach by the other party, or in the event of

insolvency. We have the right to terminate the Manufacturing Agreement or any portion of the services at any time on 60 business days’ notice, and AGC
has the right to terminate the agreement on 60 business days’ notice if it reasonably concludes that the services are not scientifically or technically feasible
despite its commercially reasonable efforts and after we and AGC attempt to resolve the scientific or technical problem in good faith. The AGC License
Agreement expires on the later of the expiration of all licensed patents or our use of trade secrets relating to the CHEF1 Technology or manufacture of
Products. The AGC License Agreement terminates immediately in the event of either party’s insolvency, and AGC may terminate the AGC License
Agreement for our material breach on 30 days’ notice to us.

14

 
Manufacturing and Supply

We do not own or operate, and currently have no plans to establish, any GMP manufacturing facilities. We rely, and expect to continue to rely, on

third parties for the manufacture of our product candidates for preclinical and clinical testing, as well as for commercial manufacture if any of our product
candidates obtain marketing approval. We also rely, and expect to continue to rely, on third parties to package, label, store and distribute our investigational
product candidates and, if marketing approval is obtained, our commercial products. We believe this strategy allows us to maintain a more efficient
infrastructure by eliminating the need for us to invest in our own manufacturing facilities, equipment and personnel while also enabling us to focus our
expertise and resources on the development of new product candidates.

To date, we have obtained bulk drug substance, or BDS, for HPN424, HPN536 and HPN217 from a single-source third-party contract manufacturer,

AGC. While any reduction or halt in supply of BDS from this contract manufacturer could limit our ability to develop our product candidates until a
replacement contract manufacturer is found and qualified, we believe that we have sufficient BDS to support our current clinical trial programs. We have
obtained final drug product for these product candidates from one of two engaged third-party contract manufacturers. We are in the process of developing
our supply chain for each of our product candidates and intend to put in place agreements under which our third-party contract manufacturers will generally
provide us with necessary quantities of BDS and drug product on a project-by-project basis based on our development and commercial supply needs.

All of our TriTACs and ProTriTACs are or will be manufactured from a vial of a master cell bank of that product’s production cell line. We have or

intend to have one master cell bank for each TriTAC and ProTriTAC that was or will be produced and tested in accordance with current good
manufacturing practice, or cGMP, and applicable regulations. Each master cell bank is or will be stored in two independent locations, and we intend to
produce working cell banks for each product candidate later in product development. It is possible that we could lose multiple cell banks from multiple
locations and have our manufacturing severely impacted by the need to replace the cell banks. However, we believe we have adequate backup should any
particular cell bank be lost in a catastrophic event.

Competition

The pharmaceutical and biotechnology industries are characterized by rapidly advancing technologies, intense competition and a strong emphasis on
proprietary products. While we believe that our technology, development experience and scientific knowledge provide us with competitive advantages, we
face potential competition from many different sources, including large pharmaceutical and biotechnology companies, academic institutions, government
agencies and other public and private research organizations that conduct research, seek patent protection and establish collaborative arrangements for the
research, development, manufacturing and commercialization of cancer immunotherapies. Any product candidates that we successfully develop and
commercialize will compete with new immunotherapies that may become available in the future.

We compete in the segments of the pharmaceutical, biotechnology and other related markets that develop immuno-oncology treatments. There are

many other companies that have commercialized and/or are developing immuno-oncology treatments for cancer including large pharmaceutical and
biotechnology companies, such as AbbVie, Amgen, AstraZeneca/MedImmune, Bristol-Myers Squibb, Johnson & Johnson, Merck, Novartis, Pfizer and
Roche/Genentech.

We face significant competition from pharmaceutical and biotechnology companies that target specific tumor-associated antigens using immune
cells or other cytotoxic modalities. These generally include immune cell redirecting therapeutics (e.g., T cell engagers), adoptive cellular therapies (e.g.,
CAR-Ts), antibody drug conjugates, targeted radiopharmaceuticals, targeted immunotoxin and targeted cancer vaccines.

With respect to HPN424, we are aware of other competing PSMA-targeting clinical stage therapeutics, which include, but are not limited to: T cell

engagers from Amgen Inc. and Regeneron Pharmaceuticals, Inc.; CAR-Ts from Poseida Therapeutics, Inc., Sorrento Therapeutics, Inc. and Tmunity
Therapeutics, Inc.; and radiopharmaceuticals from Endocyte Inc./Novartis AG and Bayer.

With respect to HPN536, we are aware of other competing MSLN-targeting clinical stage therapeutics, which include, but are not limited to: CAR-T
from Novartis AG, Atara Inc. and TCR2; antibody drug conjugates from Bayer AG and Bristol-Myers Squibb Company; and other modalities from AbbVie
Inc., Bayer AG and Selecta Biosciences Inc.

With respect to HPN217, we are aware of other competing BCMA-targeting clinical stage therapeutics, which include, but are not limited to: T cell

engagers from Amgen Inc., Pfizer Inc., Janssen Pharmaceuticals, Inc., Bristol-Myers Squibb Company, TeneoBio, Inc. and Regeneron Pharmaceuticals,
Inc.; CAR-Ts from Autolus Therapeutics PLC, bluebird bio, Bristol-Myers Squibb Company, Legend Biotech/Janssen Pharmaceuticals, Inc. and Novartis
AG, and Allogene Therapeutics; antibody drug conjugates from GlaxoSmithKline PLC and AstraZeneca/MedImmune LLC; and other modalities from
Affimed N.V. and Unum Therapeutics Inc./Seattle Genetics Inc.

15

 
With respect to our earlier stage pipeline DLL3-targeting TriTAC product candidate, HPN328 we are aware of other competing DLL3-targeting

clinical stage therapeutics. These include, but are not limited to: T cell engagers from Amgen Inc.; and CAR-T from Amgen Inc. and Boehringer
Ingelheim; and Allogene Therapeutics.

We are also currently developing a pipeline of ProTriTACs and other protease-activated therapeutics that face increasing competition from other
biologic prodrug developers, which include, but are not limited to, Akrevia Therapeutics Inc., Amunix Pharmaceuticals, Inc., Bayer AG, BioAtla, LLC,
Chugai Pharmaceutical Co., Ltd., CytomX Therapeutics, Inc., Genentech, Inc., Nektar Therapeutics, Pandion Therapeutics, Inc., Revitope Oncology, Inc.,
Roche Holding AG and Seattle Genetics Inc.

Many of the companies against which we are competing or against which we may compete in the future have significantly greater financial

resources and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals and
marketing approved drugs than we do. Mergers and acquisitions in the pharmaceutical, biotechnology and diagnostic industries may result in even more
resources being concentrated among a smaller number of our competitors. Smaller or early-stage companies may also prove to be significant competitors,
particularly through collaborative arrangements with large and established companies. These competitors also compete with us in recruiting and retaining
qualified scientific and management personnel and establishing clinical trial sites and enrolling subjects for our clinical trials, as well as in acquiring
technologies complementary to, or necessary for, our programs.

We could see a reduction or elimination of our commercial opportunity if our competitors develop and commercialize products that are safer, more

effective, have fewer or less severe side effects, are more convenient or are less expensive than any products that we or our collaborators may develop. Our
competitors also may obtain FDA or foreign regulatory approval for their products more rapidly than we may obtain approval for ours, which could result
in our competitors establishing a strong market position before we or our collaborators are able to enter the market. The key competitive factors affecting
the success of all our product candidates, if approved, are likely to be their efficacy, safety, convenience, price, the effectiveness of companion diagnostics,
if required, the level of biosimilar or generic competition and the availability of reimbursement from government and other third-party payors.

Intellectual Property

The proprietary nature and protection of our platforms, product candidates and discovery programs, as well as our processes and know-how, are

important to our business. We have sought patent protection in the United States and internationally for our TriTAC platform, binding domains and related
TriTAC product candidates, as well as the proprietary technology in our ProTriTAC platform and any other inventions to which we have rights, where
available and when appropriate. For our product candidates, we generally pursue patent protection covering compositions of matter, methods of use and
manufacture. Our policy is to pursue, maintain and defend patent rights in strategic areas, whether developed internally or licensed from third parties, and
to protect the technology, inventions and improvements that are commercially important to the development of our business. We may also rely on trade
secrets that may be important to the development of our business.

To date, we have spent considerable effort securing intellectual property rights, including rights related to our TriTAC and ProTriTAC platforms,
binding domains and specific targets pertaining to our product candidates. Below is a summary of how we view our protections and ongoing prosecution
efforts.  

TriTAC Platform

For our TriTAC platform, as of December 31, 2019 we own one patent family directed to composition-of-matter coverage and method of use of our
core TriTAC platform technology. This family includes one issued U.S. patent, one U.S. non-provisional patent application and over ten foreign application
counterparts. The issued patent in this family is projected to expire in 2036, not including any patent term adjustments and any patent term extensions.

In addition to patent protection on our core TriTAC platform technology, as of December 31, 2019, we owned two patent families that relate to the

CD3 and albumin binding domains of the TriTAC platform. Specifically, these two families are directed to composition-of-matter, method of use and
sequence coverage to our anti-CD3 single-variable fragment, scFv, and anti-albumin single domain antibody, sdAb, binding domains. These patent families
include three issued U.S. patents, two U.S. non-provisional patent applications and over twenty foreign application counterparts. The issued patents in these
two patent families are projected to expire in 2037, not including any patent term adjustments and extensions.

HPN424

For our lead TriTAC product candidate, HPN424, as of December 31, 2019, we owned two patent families directed to composition-of-matter

coverage of HPN424, its PSMA binding domain and related molecules, as well as methods of use for prostate cancer. These patent families include two
U.S. non-provisional patent applications and over twenty foreign application counterparts. Any patents issuing from these two patent families are projected
to expire in 2037, not including any patent term adjustments and extensions. In addition to these two patent families, our patents on our core TriTAC
platform technology and our anti-CD3 and albumin binding domains, provide additional patent coverage on HPN424.

16

 
HPN536

For our second TriTAC product candidate, HPN536, as of December 31, 2019, we owned two patent families directed to composition-of-matter

coverage of HPN536, its MSLN-binding domain and related molecules, as well as methods of use for cancers. These patent families include two U.S. non-
provisional patent applications and over twenty foreign application counterparts. Any patents issuing from these two patent families are projected to expire
in 2038, not including any patent term adjustments and extensions. In addition to these two patent families, our patents on our core TriTAC platform
technology and our anti-CD3 and albumin binding domains provide additional patent coverage on HPN536.

HPN217

For our pipeline BCMA-Targeting TriTAC product candidate HPN217, as of December 31, 2019, we owned two patent families directed to
composition-of-matter coverage of HPN217, its BCMA binding domain and related molecules, as well as methods of use for cancers. These patent families
include two U.S. non-provisional patent applications and two PCT international applications. Any patents issuing from these two patent families are
projected to expire in 2038, not including any patent term adjustments and extensions. In addition to these two patent families, our patents on our anti-CD3
and albumin binding domains provide additional patent coverage on HPN217.

HPN328

For our pipeline DLL3-targeting TriTAC, HPN328, as of December 31, 2019, we owned two patent families directed to composition-of-matter

coverage of this TriTAC, its DLL3 binding domain and related molecules, as well as methods of use for cancers. These patent families include two non-
expired U.S. provisional patent applications. Any patents issuing from these two patent families are projected to expire in 2039, not including any patent
term adjustments and extensions. In addition to these two patent families, our patents on our anti-CD3 and albumin binding domains provide additional
patent coverage on this TriTAC.

ProTriTAC Platform

Our patent portfolio for our ProTriTAC platform is at an early stage, with no issued patents as of December 31, 2019, and includes six patent

families directed to composition-of-matter coverage of the ProTriTAC binding moieties, applications in various protein and cellular therapy formats and
methods of use thereof. These patent families include eight non-expired U.S. provisional patent applications. Any patents issuing from these six patent
families are projected to expire in 2039, not including any patent term adjustments and extensions.

We are involved in a significant litigation with Maverick Therapeutics, Inc. regarding an intellectual property-based dispute relating to our

ProTriTAC program. For more information, see “Item 3. Legal Proceedings” elsewhere in this Form 10-K.

Our commercial success will depend in part on obtaining and maintaining patent protection and trade secret protection of our current and future

product candidates and the methods used to develop and manufacture them, as well as successfully defending these patents against any third-party
challenges. Our ability to stop third parties from making, using, selling, offering to sell or importing our product candidates depends on the extent to which
we have rights under valid and enforceable patents or trade secrets that cover these activities. We cannot be sure that patents will be granted with respect to
any of our pending patent applications or with respect to any patent applications filed by us in the future, nor can we be sure that any of our existing patents
or any patents that may be granted to us in the future will be commercially useful in protecting our product candidates, discovery programs and processes.

The term of individual patents depends upon the legal term of the patents in the countries in which they are obtained. In most countries in which we

file, the patent term is 20 years from the earliest date of filing a non-provisional patent application. In the United States, the patent term of a patent that
covers an FDA-approved drug may also be eligible for patent term extension, which permits patent term restoration as compensation for the patent term
lost during the FDA regulatory review process. The Hatch-Waxman Amendments permit a patent term extension of up to five years beyond the expiration
of the patent. The length of the patent term extension is related to the length of time the drug is under regulatory review. Patent term extension cannot
extend the remaining term of a patent beyond a total of 14 years from the date of product approval, only one patent applicable to an approved drug may be
extended and only those claims covering the approved drug, a method for using it or a method for manufacturing it may be extended. Similar provisions are
available in foreign jurisdictions to extend the term of a patent that covers an approved drug. In the future, if and when our product candidates receive FDA
approval, we expect to apply for patent term extensions on patents covering those products. While we plan to seek patent term extensions on any of our
issued patents in any jurisdiction where these are available, there is no guarantee that the applicable authorities, including the FDA in the United States,
will agree with our assessment of whether such extensions should be granted and, if granted, the length of such extensions.

17

 
In addition to patent protection, we also rely on trademark registration, trade secrets, know how, other proprietary information and continuing
technological innovation to develop and maintain our competitive position. We seek to protect and maintain the confidentiality of proprietary information
to protect aspects of our business that are not amenable to, or that we do not consider appropriate for, patent protection. Although we take steps to protect
our proprietary information and trade secrets, including through contractual means with our employees and consultants, third parties may independently
develop substantially equivalent proprietary information and techniques or otherwise gain access to our trade secrets or disclose our technology. We may
therefore not be able to meaningfully protect our trade secrets. It is our policy to require our employees, consultants, outside scientific collaborators,
sponsored researchers and other advisors to execute confidentiality agreements upon the commencement of employment or consulting relationships with
us. These agreements provide that all confidential information concerning our business or financial affairs developed or made known to the individual
during the course of the individual’s relationship with us is to be kept confidential and not disclosed to third parties except in specified circumstances. Our
agreements with employees also provide that all inventions conceived by the employee in the course of employment with us or from the employee’s use of
our confidential information are our exclusive property. However, such confidentiality agreements and invention assignment agreements can be breached
and we may not have adequate remedies for any such breach.

The patent positions of biotechnology companies like ours are generally uncertain and involve complex legal, scientific and factual questions. Our
commercial success will also depend in part on not infringing upon the proprietary rights of third parties. It is uncertain whether the issuance of any third-
party patent would require us to alter our development, commercial strategies, drugs or processes, or to obtain licenses or cease certain activities. Our
breach of any license agreements or our failure to obtain a license to proprietary rights required to develop or commercialize our future products may have
a material adverse impact on us. If third parties prepare and file patent applications in the United States that also claim technology to which we have rights,
we may have to participate in interference or derivation proceedings in the USPTO to determine priority of invention.

For more information on these risks and other comprehensive risks related to our intellectual property, see “Risk Factors—Risks Relating to Our

Intellectual Property.”

Government Regulation

The FDA and other regulatory authorities at federal, state and local levels, as well as equivalent regulatory authorities in countries outside the U.S.,

extensively regulate, among other things, the research, development, testing, manufacture, quality control, import, export, safety, effectiveness, labeling,
packaging, storage, distribution, record keeping, approval, advertising, promotion, marketing, post-approval monitoring and post-approval reporting of
biologics such as those we are developing. We, along with third-party contractors, will be required to navigate the various preclinical, clinical and
commercial approval requirements of the governing regulatory agencies of the countries in which we wish to conduct studies or seek approval or licensure
of our product candidates.

U.S. Biologics Regulation

The process required by the FDA before biologic product candidates may be marketed in the United States generally involves the following:

•

•

•

•

•

•

•

•

•

completion of preclinical laboratory tests and animal studies performed in accordance with the FDA’s current Good Laboratory Practices, or
GLP, regulation;

submission to the FDA of an IND, which must become effective before clinical trials may begin and must be updated annually or when
significant changes are made;

approval by an independent IRB or ethics committee at each clinical site before the trial is commenced;

performance of adequate and well-controlled human clinical trials to establish the safety, purity and potency of the proposed biologic product
candidate for its intended purpose;

preparation of and submission to the FDA of a BLA after completion of all pivotal clinical trials;

a determination by the FDA within 60 days of its receipt of a BLA to file the application for review;

satisfactory completion of an FDA Advisory Committee review, if applicable;

satisfactory completion of an FDA pre-approval inspection of the manufacturing facility or facilities at which the proposed product is
produced to assess compliance with current good manufacturing practices, or cGMPs, and to assure that the facilities, methods and controls
are adequate to preserve the biological product’s continued safety, purity and potency, and of selected clinical investigation sites to assess
compliance with GCPs; and

FDA review and approval of a BLA to permit commercial marketing of the product for particular indications for use in the United States.

18

 
 
 
 
 
 
 
 
 
 
Preclinical and Clinical Development

Prior to beginning the first clinical trial with a product candidate, we must submit an IND to the FDA. An IND is a request for authorization from

the FDA to administer an investigational new drug or biologic product to humans. The central focus of an IND submission is on the general investigational
plan and the protocol or protocols for preclinical studies and clinical trials. The IND also includes results of animal and in vitro studies assessing the
toxicology, pharmacokinetics, pharmacology and pharmacodynamic characteristics of the product, chemistry, manufacturing and controls information, and
any available human data or literature to support the use of the investigational product. An IND must become effective before human clinical trials may
begin. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA, within the 30-day period, raises safety concerns or
questions about the proposed clinical trial. In such a case, the IND may be placed on clinical hold and the IND sponsor and the FDA must resolve any
outstanding concerns or questions before the clinical trial can begin. Submission of an IND therefore may or may not result in FDA authorization to begin a
clinical trial.

Clinical trials involve the administration of the investigational product to human subjects under the supervision of qualified investigators in
accordance with GCPs, which include the requirement that all research subjects provide their informed consent for their participation in any clinical study.
Clinical trials are conducted under protocols detailing, among other things, the objectives of the study, the parameters to be used in monitoring safety and
the effectiveness criteria to be evaluated. A separate submission to the existing IND must be made for each successive clinical trial conducted during
product development and for any subsequent protocol amendments. Furthermore, an independent IRB for each site proposing to conduct the clinical trial
must review and approve the plan for any clinical trial and its informed consent form before the clinical trial begins at that site and must monitor the study
until completed. Regulatory authorities, the IRB or the sponsor may suspend a clinical trial at any time on various grounds, including a finding that the
subjects are being exposed to an unacceptable health risk or that the trial is unlikely to meet its stated objectives. Some studies also include oversight by an
independent group of qualified experts organized by the clinical study sponsor, known as a data safety monitoring board, which provides authorization for
whether or not a study may move forward at designated check points based on access to certain data from the study and may halt the clinical trial if it
determines that there is an unacceptable safety risk for subjects or other grounds, such as no demonstration of efficacy. There are also requirements
governing the reporting of ongoing preclinical studies and clinical trials and clinical study results to public registries.

For purposes of BLA approval, human clinical trials are typically conducted in three sequential phases that may overlap.

•

•

•

Phase 1. The investigational product is initially introduced into healthy human subjects or patients with the target disease or condition. These
studies are designed to test the safety, dosage tolerance, absorption, metabolism and distribution of the investigational product in humans, the
side effects associated with increasing doses, and, if possible, to gain early evidence on effectiveness.

Phase 2. The investigational product is administered to a limited patient population with a specified disease or condition to evaluate the
preliminary efficacy, optimal dosages and dosing schedule and to identify possible adverse side effects and safety risks. Multiple Phase 2
clinical trials may be conducted to obtain information prior to beginning larger and more expensive Phase 3 clinical trials.

Phase 3. The investigational product is administered to an expanded patient population to further evaluate dosage, to provide statistically
significant evidence of clinical efficacy and to further test for safety, generally at multiple geographically dispersed clinical trial sites. These
clinical trials are intended to establish the overall risk/benefit ratio of the investigational product and to provide an adequate basis for product
approval.

In some cases, the FDA may require, or companies may voluntarily pursue, additional clinical trials after a product is approved to gain more
information about the product. These so-called Phase 4 studies may be made a condition to approval of the BLA. Concurrent with clinical trials, companies
may complete additional animal studies and develop additional information about the biological characteristics of the product candidate and must finalize a
process for manufacturing the product in commercial quantities in accordance with cGMP requirements. The manufacturing process must be capable of
consistently producing quality batches of the product candidate and, among other things, must develop methods for testing the identity, strength, quality
and purity of the final product, or for biologics, the safety, purity and potency. Additionally, appropriate packaging must be selected and tested and stability
studies must be conducted to demonstrate that the product candidate does not undergo unacceptable deterioration over its shelf life.

BLA Submission and Review

Assuming successful completion of all required testing in accordance with all applicable regulatory requirements, the results of product

development, nonclinical studies and clinical trials are submitted to the FDA as part of a BLA requesting approval to market the product for one or more
indications. The BLA must include all relevant data available from pertinent preclinical studies and clinical trials, including negative or ambiguous results
as well as positive findings, together with detailed information relating to the product’s chemistry, manufacturing, controls, and proposed labeling, among
other things. The submission of a BLA requires payment of a substantial application user fee to the FDA, unless a waiver or exemption applies.

19

 
 
 
 
Once a BLA has been submitted, the FDA’s goal is to review standard applications within ten months after it accepts the application for filing, or, if

the application qualifies for priority review, six months after the FDA accepts the application for filing. In both standard and priority reviews, the review
process is often significantly extended by FDA requests for additional information or clarification. The FDA reviews a BLA to determine, among other
things, whether a product is safe, pure and potent and the facility in which it is manufactured, processed, packed or held meets standards designed to assure
the product’s continued safety, purity and potency. The FDA may convene an advisory committee to provide clinical insight on application review
questions. Before approving a BLA, the FDA will typically inspect the facility or facilities where the product is manufactured. The FDA will not approve
an application unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure
consistent production of the product within required specifications. Additionally, before approving a BLA, the FDA will typically inspect one or more
clinical sites to assure compliance with GCPs. If the FDA determines that the application, manufacturing process or manufacturing facilities are not
acceptable, it will outline the deficiencies in the submission and often will request additional testing or information. Notwithstanding the submission of any
requested additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval.

After the FDA evaluates a BLA and conducts inspections of manufacturing facilities where the investigational product and/or its drug substance will
be produced, the FDA may issue an approval letter or a Complete Response letter. An approval letter authorizes commercial marketing of the product with
specific prescribing information for specific indications. A Complete Response letter will describe all of the deficiencies that the FDA has identified in the
BLA, except that where the FDA determines that the data supporting the application are inadequate to support approval, the FDA may issue the Complete
Response letter without first conducting required inspections, testing submitted product lots and/or reviewing proposed labeling. In issuing the Complete
Response letter, the FDA may recommend actions that the applicant might take to place the BLA in condition for approval, including requests for
additional information or clarification. The FDA may delay or refuse approval of a BLA if applicable regulatory criteria are not satisfied, require additional
testing or information and/or require post-marketing testing and surveillance to monitor safety or efficacy of a product.

If regulatory approval of a product is granted, such approval will be granted for particular indications and may entail limitations on the indicated

uses for which such product may be marketed. For example, the FDA may approve the BLA with a Risk Evaluation and Mitigation Strategy, or REMS, to
ensure the benefits of the product outweigh its risks. A REMS is a safety strategy to manage a known or potential serious risk associated with a product and
to enable patients to have continued access to such medicines by managing their safe use, and could include medication guides, physician communication
plans, or elements to assure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. The FDA also may
condition approval on, among other things, changes to proposed labeling or the development of adequate controls and specifications. Once approved, the
FDA may withdraw the product approval if compliance with pre- and post-marketing requirements is not maintained or if problems occur after the product
reaches the marketplace. The FDA may require one or more Phase 4 post-market studies and surveillance to further assess and monitor the product’s safety
and effectiveness after commercialization, and may limit further marketing of the product based on the results of these post-marketing studies.

Expedited Development and Review Programs

The FDA offers a number of expedited development and review programs for qualifying product candidates. The fast track program is intended to
expedite or facilitate the process for reviewing new products that meet certain criteria. Specifically, new products are eligible for fast track designation if
they are intended to treat a serious or life-threatening disease or condition and demonstrate the potential to address unmet medical needs for the disease or
condition. Fast track designation applies to the combination of the product and the specific indication for which it is being studied. The sponsor of a fast
track product has opportunities for frequent interactions with the review team during product development and, once a BLA is submitted, the product may
be eligible for priority review. A fast track product may also be eligible for rolling review, where the FDA may consider for review sections of the BLA on
a rolling basis before the complete application is submitted, if the sponsor provides a schedule for the submission of the sections of the BLA, the FDA
agrees to accept sections of the BLA and determines that the schedule is acceptable, and the sponsor pays any required user fees upon submission of the
first section of the BLA.

A product intended to treat a serious or life-threatening disease or condition may also be eligible for breakthrough therapy designation to expedite its

development and review. A product can receive breakthrough therapy designation if preliminary clinical evidence indicates that the product, alone or in
combination with one or more other drugs or biologics, may demonstrate substantial improvement over existing therapies on one or more clinically
significant endpoints, such as substantial treatment effects observed early in clinical development. The designation includes all of the fast track program
features, as well as more intensive FDA interaction and guidance beginning as early as Phase 1 and an organizational commitment to expedite the
development and review of the product, including involvement of senior managers.

20

 
Any marketing application for a biologic submitted to the FDA for approval, including a product with a fast track designation and/or breakthrough
therapy designation, may be eligible for other types of FDA programs intended to expedite the FDA review and approval process, such as priority review
and accelerated approval. A product is eligible for priority review if it has the potential to provide a significant improvement in the treatment, diagnosis or
prevention of a serious disease or condition. For original BLAs, priority review designation means the FDA’s goal is to take action on the marketing
application within six months of the 60-day filing date (as compared to ten months under standard review).

Additionally, products studied for their safety and effectiveness in treating serious or life-threatening diseases or conditions may receive accelerated

approval upon a determination that the product has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit, or on a clinical
endpoint that can be measured earlier than irreversible morbidity or mortality, that is reasonably likely to predict an effect on irreversible morbidity or
mortality or other clinical benefit, taking into account the severity, rarity, or prevalence of the condition and the availability or lack of alternative
treatments. As a condition of accelerated approval, the FDA will generally require the sponsor to perform adequate and well-controlled post-marketing
clinical studies to verify and describe the anticipated effect on irreversible morbidity or mortality or other clinical benefit. In addition, the FDA currently
requires as a condition for accelerated approval pre-approval of promotional materials, which could adversely impact the timing of the commercial launch
of the product.

A regenerative medicine advanced therapy, or RMAT, designation is intended to facilitate an efficient development program for, and expedited

review of, any drug that meets the following criteria: (i) the drug qualifies as a RMAT, which is defined as a cell therapy, therapeutic tissue engineering
product, human cell and tissue product, or any combination product using such therapies or products, with limited exceptions; (ii) the drug is intended to
treat, modify, reverse, or cure a serious or life-threatening disease or condition; and (iii) preliminary clinical evidence indicates that the drug has the
potential to address unmet medical needs for such a disease or condition. Like breakthrough therapy designation, RMAT designation provides potential
benefits that include more frequent meetings with the FDA to discuss the development plan for the product candidate and eligibility for rolling review and
priority review. Products granted RMAT designation may also be eligible for accelerated approval on the basis of a surrogate or intermediate endpoint
reasonably likely to predict long-term clinical benefit, or reliance upon data obtained from a meaningful number of sites, including through expansion to
additional sites. Once approved, when appropriate, the FDA can permit fulfillment of post-approval requirements under accelerated approval through: the
submission of clinical evidence, preclinical studies, clinical trials, patient registries or other sources of real world evidence such as electronic health
records; the collection of larger confirmatory datasets; or post-approval monitoring of all patients treated with the therapy prior to approval.

Fast track designation, breakthrough therapy designation, priority review and RMAT designation do not change the standards for approval but may
expedite the development or approval process. Even if a product qualifies for one or more of these programs, the FDA may later decide that the product no
longer meets the conditions for qualification or decide that the time period for FDA review or approval will not be shortened.

Orphan Drug Designation

Under the Orphan Drug Act, the FDA may grant orphan designation to a drug or biologic intended to treat a rare disease or condition, which is a

disease or condition that affects fewer than 200,000 individuals in the United States, or more than 200,000 individuals in the United States for which there
is no reasonable expectation that the cost of developing and making available in the United States a drug or biologic for this type of disease or condition
will be recovered from sales in the United States for that drug or biologic. Orphan drug designation must be requested before submitting a BLA. After the
FDA grants orphan drug designation, the generic identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. The
orphan drug designation does not convey any advantage in, or shorten the duration of, the regulatory review or approval process.

If a product that has orphan drug designation subsequently receives the first FDA approval for the disease for which it has such designation, the

product is entitled to orphan drug exclusive approval (or exclusivity), which means that the FDA may not approve any other applications, including a full
BLA, to market the same biologic for the same indication for seven years, except in limited circumstances, such as a showing of clinical superiority to the
product with orphan drug exclusivity or if the FDA finds that the holder of the orphan drug exclusivity has not shown that it can assure the availability of
sufficient quantities of the orphan drug to meet the needs of patients with the disease or condition for which the drug was designated. Orphan drug
exclusivity does not prevent the FDA from approving a different drug or biologic for the same disease or condition, or the same drug or biologic for a
different disease or condition. Among the other benefits of orphan drug designation are tax credits for certain research and a waiver of the BLA application
fee.

A designated orphan drug may not receive orphan drug exclusivity if it is approved for a use that is broader than the indication for which it received
orphan designation. In addition, exclusive marketing rights in the United States may be lost if the FDA later determines that the request for designation was
materially defective or if the manufacturer is unable to assure sufficient quantities of the product to meet the needs of patients with the rare disease or
condition.

21

 
Post-Approval Requirements

Any products manufactured or distributed by us pursuant to FDA approvals are subject to pervasive and continuing regulation by the FDA,
including, among other things, requirements relating to record-keeping, reporting of adverse experiences, periodic reporting, product sampling and
distribution, and advertising and promotion of the product. After approval, most changes to the approved product, such as adding new indications or other
labeling claims, are subject to prior FDA review and approval. There also are continuing user fee requirements, under which the FDA assesses an annual
program fee for each product identified in an approved BLA. Biologic manufacturers and their subcontractors are required to register their establishments
with the FDA and certain state agencies, and are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with
cGMPs, which impose certain procedural and documentation requirements upon us and our third-party manufacturers. Changes to the manufacturing
process are strictly regulated, and, depending on the significance of the change, may require prior FDA approval before being implemented. FDA
regulations also require investigation and correction of any deviations from cGMPs and impose reporting requirements upon us and any third-party
manufacturers that we may decide to use. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality
control to maintain compliance with cGMPs and other aspects of regulatory compliance.

The FDA may withdraw approval if compliance with regulatory requirements and standards is not maintained or if problems occur after the product

reaches the market. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency, or
with manufacturing processes, or failure to comply with regulatory requirements, may result in revisions to the approved labeling to add new safety
information; imposition of post-market studies or clinical studies to assess new safety risks; or imposition of distribution restrictions or other restrictions
under a REMS program. Other potential consequences include, among other things:

•

•

•

•

•

•

•

•

restrictions on the marketing or manufacturing of a product, complete withdrawal of the product from the market or product recalls;

fines, warning letters or holds on post-approval clinical studies;

refusal of the FDA to approve pending applications or supplements to approved applications, or suspension or revocation of existing product
approvals;

product seizure or detention, or refusal of the FDA to permit the import or export of products;

consent decrees, corporate integrity agreements, debarment or exclusion from federal healthcare programs;

mandated modification of promotional materials and labeling and the issuance of corrective information;

the issuance of safety alerts, Dear Healthcare Provider letters, press releases and other communications containing warnings or other safety
information about the product; or

injunctions or the imposition of civil or criminal penalties.

The FDA closely regulates the marketing, labeling, advertising and promotion of biologics. A company can make only those claims relating to
safety and efficacy, purity and potency that are approved by the FDA and in accordance with the provisions of the approved label. The FDA and other
agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses. Failure to comply with these requirements can result in,
among other things, adverse publicity, warning letters, corrective advertising and potential civil and criminal penalties. Physicians may prescribe legally
available products for uses that are not described in the product’s labeling and that differ from those tested by us and approved by the FDA. Such off-label
uses are common across medical specialties. Physicians may believe that such off-label uses are the best treatment for many patients in varied
circumstances. The FDA does not regulate the behavior of physicians in their choice of treatments. The FDA does, however, restrict manufacturer’s
communications on the subject of off-label use of their products.

Regulation of Companion Diagnostic Tests

We expect that our product candidates may require use of a diagnostic to identify appropriate patient population. These diagnostics, often referred to

as companion diagnostics, are medical devices, often in vitro devices, which provide information that is essential for the safe and effective use of a
corresponding drug. In the United States, the FDCA and its implementing regulations, and other federal and state statutes and regulations govern, among
other things, medical device design and development, preclinical and clinical testing, premarket clearance or approval, registration and listing,
manufacturing, labeling, storage, advertising and promotion, sales and distribution, export and import, and post-market surveillance. Unless an exemption
applies, diagnostic tests require marketing clearance or approval from the FDA prior to commercial distribution. The two primary types of FDA marketing
authorization applicable to a medical device are premarket notification, also called 510(k) clearance, and premarket approval, or PMA approval. We expect
that any companion diagnostic developed for use with our product candidates will utilize the PMA pathway.

22

 
 
 
 
 
 
 
 
 
PMA applications must be supported by valid scientific evidence, which typically requires extensive data, including technical, preclinical, clinical

and manufacturing data, to demonstrate to the FDA’s satisfaction the safety and effectiveness of the device. For diagnostic tests, a PMA application
typically includes data regarding analytical and clinical validation studies. As part of its review of the PMA, the FDA will conduct a pre-approval
inspection of the manufacturing facility or facilities to ensure compliance with the Quality System Regulation, or QSR, which requires manufacturers to
follow design, testing, control, documentation and other quality assurance procedures. FDA review of an initial PMA may require several years to
complete. If the FDA evaluations of both the PMA application and the manufacturing facilities are favorable, the FDA will either issue an approval letter or
an approvable letter, which usually contains a number of conditions that must be met in order to secure the final approval of the PMA. If the FDA’s
evaluation of the PMA or manufacturing facilities is not favorable, the FDA will deny approval of the PMA or issue a not approvable letter. A not
approvable letter will outline the deficiencies in the application and, where practical, will identify what is necessary to make the PMA approvable. The
FDA may also determine that additional clinical trials are necessary, in which case the PMA approval may be delayed for several months or years while the
trials are conducted and then the data submitted in an amendment to the PMA. Once granted, PMA approval may be withdrawn by the FDA if compliance
with post approval requirements, conditions of approval or other regulatory standards is not maintained or problems are identified following initial
marketing.

On August 6, 2014, the FDA issued a final guidance document addressing the development and approval process for “In Vitro Companion

Diagnostic Devices.” According to the guidance, a companion diagnostic device and its corresponding drug should be approved or cleared
contemporaneously by the FDA for the use indicated in the therapeutic product labeling. The guidance also explains that a companion diagnostic device
used to make treatment decisions in clinical trials generally will be considered an investigational device, unless it is employed for an intended use for which
the device is already approved or cleared. If used to make critical treatment decisions, such as patient selection, the diagnostic device generally will be
considered a significant risk device under the FDA’s Investigational Device Exemption, or IDE, regulations. Thus, the sponsor of the diagnostic device will
be required to comply with the IDE regulations. According to the guidance, if a diagnostic device and therapeutic are to be studied together to support their
respective approvals, both products can be studied in the same investigational study, if the study meets both the requirements of the IDE regulations and the
IND regulations. The guidance provides that depending on the details of the study plan and subjects, a sponsor may seek to submit an IND alone, or both
an IND and an IDE.

Biosimilars and Reference Product Exclusivity

The ACA includes a subtitle called the BPCIA, which created an abbreviated approval pathway for biological products that are biosimilar to or

interchangeable with an FDA-approved reference biological product.

Biosimilarity, which requires that there be no clinically meaningful differences between the biological product and the reference product in terms of

safety, purity, and potency, can be shown through analytical studies, animal studies, and a clinical study or studies. Interchangeability requires that a
product is biosimilar to the reference product and the product must demonstrate that it can be expected to produce the same clinical results as the reference
product in any given patient and, for products that are administered multiple times to an individual, the biologic and the reference biologic may be
alternated or switched after one has been previously administered without increasing safety risks or risks of diminished efficacy relative to exclusive use of
the reference biologic.

Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years following the date that the reference

product was first licensed by the FDA. In addition, the approval of a biosimilar product may not be made effective by the FDA until 12 years from the date
on which the reference product was first licensed. During this 12-year period of exclusivity, another company may still market a competing version of the
reference product if the FDA approves a full BLA for the competing product containing that applicant’s own preclinical data and data from adequate and
well-controlled clinical trials to demonstrate the safety, purity and potency of its product. The BPCIA also created certain exclusivity periods for
biosimilars approved as interchangeable products.

The BPCIA is complex and continues to be interpreted and implemented by the FDA. In addition, government proposals have sought to reduce the

12-year reference product exclusivity period. Other aspects of the BPCIA, some of which may impact the BPCIA exclusivity provisions, have also been the
subject of recent litigation. As a result, the ultimate impact, implementation, and impact of the BPCIA is subject to significant uncertainty.  

Other Healthcare Laws and Compliance Requirements

Pharmaceutical companies are subject to additional healthcare regulation and enforcement by the federal government and by authorities in the states

and foreign jurisdictions in which they conduct their business. Such laws include, without limitation: the federal Anti-Kickback Statute, the federal False
Claims Act, HIPAA and similar foreign, federal and state fraud and abuse, transparency and privacy laws.

23

 
The federal Anti-Kickback Statute prohibits, among other things, persons and entities from knowingly and willfully soliciting, receiving, offering or

paying remuneration, to induce, or in return for, either the referral of an individual, or the purchase or recommendation of an item or service for which
payment may be made under any federal healthcare program. The term remuneration has been interpreted broadly to include anything of value, including
stock options. The federal Anti-Kickback Statute has been interpreted to apply to arrangements between pharmaceutical manufacturers on one hand and
prescribers, purchasers on the other. There are a number of statutory exceptions and regulatory safe harbors protecting some common activities from
prosecution, but they are drawn narrowly and practices that involve remuneration, such as consulting agreements, that may be alleged to be intended to
induce prescribing, purchasing or recommending may be subject to scrutiny if they do not qualify for an exception or safe harbor. Failure to meet all of the
requirements of a particular applicable statutory exception or regulatory safe harbor does not make the conduct per se illegal under the federal Anti-
Kickback Statute. Instead, the legality of the arrangement will be evaluated on a case-by-case basis based on a cumulative review of all of its facts and
circumstances. Our practices may not in all cases meet all of the criteria for protection under a statutory exception or regulatory safe harbor. A person or
entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation. In addition, a claim
including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the federal
False Claims Act.

Civil and criminal false claims laws, including the federal False Claims Act, which can be enforced through civil whistleblower or qui tam actions,

and civil monetary penalty laws, prohibit, among other things, individuals or entities from knowingly presenting, or causing to be presented, claims for
payment to the federal government, including federal healthcare programs, that are false or fraudulent. For example, the federal False Claims Act prohibits
any person or entity from knowingly presenting, or causing to be presented, a false claim for payment to the federal government or knowingly making,
using or causing to be made or used a false record or statement material to a false or fraudulent claim to the federal government. A claim includes “any
request or demand” for money or property presented to the U.S. government. Several pharmaceutical and other healthcare companies have been prosecuted
under these laws for allegedly providing free product to customers with the expectation that the customers would bill federal programs for the product.

HIPAA created additional federal criminal statutes that prohibit, among other things, executing a scheme to defraud any healthcare benefit program,

including private third-party payors, and making false statements relating to healthcare matters. In addition, HIPAA, as amended by HITECH, and their
implementing regulations, impose certain requirements on HIPAA covered entities, which include certain healthcare providers, healthcare clearing houses
and health plans, and individuals and entities that provide services on their behalf that involves individually identifiable health information, known as
business associates, relating to the privacy, security and transmission of individually identifiable health information.

The U.S. federal Physician Payments Sunshine Act requires certain manufacturers of drugs, devices, biologics and medical supplies for which

payment is available under Medicare, Medicaid or the Children’s Health Insurance Program, with specific exceptions, to annually report to CMS
information related to payments or other transfers of value made to physicians, as defined by such law, and teaching hospitals, as well as ownership and
investment interests held by physicians and their immediate family members.

We are also subject to additional similar U.S. state and foreign law equivalents of each of the above federal laws, which, in some cases, differ from

each other in significant ways, and may not have the same effect, thus complicating compliance efforts. If our operations are found to be in violation of any
of such laws or any other governmental regulations that apply, we may be subject to penalties, including, without limitation, significant civil, criminal and
administrative penalties, damages, fines, exclusion from government-funded healthcare programs, such as Medicare and Medicaid or similar programs in
other countries or jurisdictions, integrity oversight and reporting obligations to resolve allegations of non-compliance, disgorgement, individual
imprisonment, contractual damages, reputational harm, diminished profits and the curtailment or restructuring of our operations.

Coverage and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any pharmaceutical or biological product for which we obtain
regulatory approval. Sales of any product, if approved, depend, in part, on the extent to which such product will be covered by third-party payors, such as
federal, state, and foreign government healthcare programs, commercial insurance and managed healthcare organizations, and the level of reimbursement,
if any, for such product by third-party payors. Decisions regarding whether to cover any of our product candidates, if approved, the extent of coverage and
amount of reimbursement to be provided are made on a plan-by-plan basis. Further, no uniform policy for coverage and reimbursement exists in the United
States, and coverage and reimbursement can differ significantly from payor to payor. Third-party payors often rely upon Medicare coverage policy and
payment limitations in setting their own reimbursement rates, but also have their own methods and approval process apart from Medicare determinations.
As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide scientific and clinical support
for the use of our product candidates to each payor separately, with no assurance that coverage and adequate reimbursement will be applied consistently or
obtained in the first instance.

24

 
For products administered under the supervision of a physician, obtaining coverage and adequate reimbursement may be particularly difficult
because of the higher prices often associated with such drugs. Additionally, separate reimbursement for the product itself or the treatment or procedure in
which the product is used may not be available, which may impact physician utilization. In addition, companion diagnostic tests require coverage and
reimbursement separate and apart from the coverage and reimbursement for their companion pharmaceutical or biological products. Similar challenges to
obtaining coverage and reimbursement, applicable to pharmaceutical or biological products, will apply to companion diagnostics.

In addition, the U.S. government, state legislatures and foreign governments have continued implementing cost-containment programs, including

price controls, restrictions on coverage and reimbursement and requirements for substitution of generic products. Third-party payors are increasingly
challenging the prices charged for medical products and services, examining the medical necessity and reviewing the cost effectiveness of pharmaceutical
or biological products, medical devices and medical services, in addition to questioning safety and efficacy. Adoption of price controls and cost-
containment measures, and adoption of more restrictive policies in jurisdictions with existing controls and measures, could further limit sales of any
product that receives approval. Decreases in third-party reimbursement for any product or a decision by a third-party not to cover a product could reduce
physician usage and patient demand for the product. No regulatory authority has granted approval for a personalized cancer immunotherapy based on a
vaccine approach, and there is no model for reimbursement of this type of product.

Healthcare Reform

The United States and some foreign jurisdictions are considering or have enacted a number of reform proposals to change the healthcare system.

There is significant interest in promoting changes in healthcare systems with the stated goals of containing healthcare costs, improving quality or
expanding access. In the United States, the pharmaceutical industry has been a particular focus of these efforts and has been significantly affected by
federal and state legislative initiatives, including those designed to limit the pricing, coverage, and reimbursement of pharmaceutical and biopharmaceutical
products, especially under government-funded health care programs, and increased governmental control of drug pricing.

The ACA, which was enacted in March 2010, substantially changed the way healthcare is financed by both governmental and private insurers in the
United States, and significantly affected the pharmaceutical industry. The ACA contains a number of provisions of particular import to the pharmaceutical
and biotechnology industries, including, but not limited to, those governing enrollment in federal healthcare programs, a new methodology by which
rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted or injected,
and annual fees based on pharmaceutical companies’ share of sales to federal health care programs. There remain judicial and Congressional challenges to
certain aspects of the ACA, as well as efforts by the Trump administration to repeal or replace certain aspects of the ACA. For example, the Tax Act was
enacted, which, among other things, removes penalties for not complying with ACA’s requirement to carry health insurance, known as the “individual
mandate”, effective January 1, 2019. Since the enactment of the Tax Act, there have been additional amendments to certain provisions of the ACA. On
December 14, 2018, a Texas U.S. District Court Judge ruled that the ACA is unconstitutional in its entirety because the “individual mandate” was repealed
by Congress as part of the Tax Act. Additionally, on December 18, 2019, the U.S. Court of Appeals for the 5th Circuit upheld the District Court ruling that
the individual mandate was unconstitutional and remanded the case back to the District Court to determine whether the remaining provisions of the ACA
are invalid as well. It is unclear how this decision, future decisions, subsequent appeals, and other efforts to repeal and replace the ACA will impact the
ACA.

Other legislative changes have been proposed and adopted since the ACA was enacted, including aggregate reductions of Medicare payments to

providers of 2% per fiscal year and reduced payments to several types of Medicare providers. These reductions went into effect in April 2013 and, due to
subsequent legislative amendments to the statute, will remain in effect through 2029 unless additional action is taken by Congress.

Moreover, there has recently been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products,

which has resulted in several Congressional inquiries and proposed and enacted federal and state legislation designed to, among other things, bring more
transparency to product pricing, review the relationship between pricing and manufacturer patient programs, and reform government program
reimbursement methodologies for drug products.  At the federal level, the Trump administration’s budget proposal for fiscal year 2020 contains further drug
price control measures that could be enacted during the budget process or in other future legislation, including, for example, measures to permit Medicare
Part D plans to negotiate the price of certain drugs under Medicare Part B, to allow some states to negotiate drug prices under Medicaid, and to eliminate
cost sharing for generic drugs for low-income patients. Further, the Trump administration released a “Blueprint” to lower drug prices and reduce out of
pocket costs of drugs that contains additional proposals to increase manufacturer competition, increase the negotiating power of certain federal healthcare
programs, incentivize manufacturers to lower the list price of their products and reduce the out of pocket costs of drug products paid by consumers. The
U.S. Department of Health and Human Services has solicited feedback on certain of these measures and has implemented others under its existing
authority. For example, in May 2019, CMS issued a final rule to allow Medicare Advantage plans the option to use step therapy for Part B drugs beginning
January 1, 2020. This final rule codified CMS’s policy change that was effective January 1, 2019. Although a number of these and other measures may
require additional authorization become effective, Congress and the Trump administration have each indicated that it will continue to seek new legislative
and/or administrative measures to control drug costs At the state level, legislatures have increasingly passed legislation and implemented regulations
designed to control pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access
and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing.

25

 
Employees

As of February 29, 2020, we had 61 full time employees, 47 of whom were engaged in research and development activities and 14 of whom were
engaged in general and administrative activities. None of our employees are represented by labor unions or covered by collective bargaining agreements.
We consider our relationship with our employees to be good.

Corporate Information

We were incorporated as a Delaware corporation in March 2015. Our principal executive offices are located at 131 Oyster Point Blvd, Suite 300,

South San Francisco, California 94080, and our telephone number is (650) 443-7400. Our website address is www.harpoontx.com. The information
contained on, or that can be accessed through, our website is not incorporated by reference into this Annual Report on Form 10-K, and you should not
consider any information contained on, or that can be accessed through, our website as part of this Annual Report on Form 10-K.  

“Harpoon Therapeutics,” “Harpoon,” the Harpoon logo, TriTAC, ProTriTAC and our other registered or common law trademarks, trade names or

service marks appearing in this report are owned by us. This report contains references to our trademarks and to trademarks belonging to other entities.
Solely for convenience, trademarks and trade names referred to in this report, including logos, artwork and other visual displays, generally appear without
the ® or TM symbols, but such references are not intended to indicate, in any way, that we will not assert, to the fullest extent under applicable law, our
rights or the rights of the applicable licensor to these trademarks and trade names. We do not intend our use or display of other companies’ trade names or
trademarks to imply a relationship with, or endorsement or sponsorship of us by, any other companies.

26

 
Item 1A. Risk Factors

Risks Related to the Development and Clinical Testing of Our Product Candidates

All of our product candidates are in preclinical or early-stage clinical development. Clinical drug development is a lengthy and expensive process
with uncertain timelines and uncertain outcomes. If clinical trials of our product candidates are prolonged or delayed, we or any collaborators may
be unable to obtain required regulatory approvals, and therefore be unable to commercialize our product candidates on a timely basis or at all.

To obtain the requisite regulatory approvals to market and sell any of our product candidates, we or any collaborator for such candidates must

demonstrate through extensive preclinical studies and clinical trials that our product candidates are safe and effective in humans. Clinical testing is
expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the clinical trial process. The
results of preclinical studies and early-stage clinical trials of our product candidates may not be predictive of the results of later-stage clinical trials. Product
candidates in later stages of clinical trials may fail to show the desired safety and efficacy traits despite having progressed through preclinical studies and
initial clinical trials. A number of companies in the biopharmaceutical industry have suffered significant setbacks in advanced clinical trials due to lack of
efficacy or adverse safety profiles, notwithstanding promising results in earlier trials. Our future clinical trial results may not be successful.

To date, we have not completed any clinical trials required for the approval of any of our product candidates. Although we are conducting early

stage clinical trials and are conducting preclinical studies for other product candidates, we may experience delays in our ongoing clinical trials, and we do
not know whether planned clinical trials will begin on time, need to be redesigned, enroll patients on time or be completed on schedule, if at all. Clinical
trials can be delayed, suspended, or terminated for a variety of reasons, including the following:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

delays in or failure to reach agreement on acceptable terms with prospective CROs and clinical trial sites, the terms of which can be subject to
extensive negotiation and may vary significantly among different CROs and trial sites;

difficulty in recruiting clinical trial investigators of appropriate competencies and experience;

delays in establishing the appropriate dosage levels in clinical trials;

delays in or failure to recruit and enroll suitable patients to participate in a trial;

the difficulty in certain countries in identifying the sub-populations that we are trying to treat in a particular trial, which may delay enrollment
and reduce the power of a clinical trial to detect statistically significant results;

lower than anticipated retention rates of patients in clinical trials;

failure to have patients complete a trial or return for post-treatment follow-up;

clinical sites deviating from trial protocol or dropping out of a trial;

adding new clinical trial sites;

safety or tolerability concerns could cause us or our collaborators or governmental authorities, as applicable, to suspend or terminate a trial if
it is found that the participants are being exposed to unacceptable health risks;

delays in or failure to obtain regulatory approval to commence a trial;

delays in or failure to obtain institutional review board, or IRB, approval at each site;

our third-party research contractors failing to comply with regulatory requirements or meet their contractual obligations to us in a timely
manner, or at all;

changes in regulatory requirements, policies and guidelines;

manufacturing sufficient quantities of a product candidate for use in clinical trials;

the quality or stability of a product candidate falling below acceptable standards;

changes in the treatment landscape for our target indications that may make our product candidates no longer relevant;

27

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
•

•

•

third-party actions claiming infringement by our product candidates in clinical trials outside the United States and obtaining injunctions
interfering with our progress;

the impact of public health epidemics, such as the coronavirus disease (COVID-19) currently impacting multiple jurisdictions worldwide,
including the United States; and

business interruptions resulting from geo-political actions, including war and terrorism, or natural disasters including earthquakes, typhoons,
floods and fires.

We could encounter delays if a clinical trial is suspended or terminated by us, by the IRBs or Ethics Committees of the institutions in which such
trials are being conducted, by the Data Review Committee or Data Safety Monitoring Board for such trial or by the FDA, or other regulatory authorities.
Such authorities may impose such a suspension or termination due to a number of factors, including failure to conduct the clinical trial in accordance with
regulatory requirements or our clinical protocols, inspection of the clinical trial operations or trial site by the FDA or other regulatory authorities resulting
in the imposition of a clinical hold, unforeseen safety issues or adverse side effects, failure to demonstrate a benefit from using a drug, changes in
governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial.

If we experience delays in the completion of, or termination of, any clinical trial of our product candidates, the commercial prospects of our product

candidates will be harmed, and our ability to generate product revenues from any of these product candidates will be delayed. In addition, any delays in
completing our clinical trials will increase our costs, slow down our product candidate development and approval process and jeopardize our ability to
commence product sales and generate revenues. Significant clinical trial delays could also allow our competitors to bring products to market before we do
or shorten any periods during which we have the exclusive right to commercialize our product candidates and impair our ability to commercialize our
product candidates and may harm our business and results of operations.

Any of these occurrences may harm our business, financial condition and prospects significantly. In addition, many of the factors that cause, or lead

to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of our product candidates.

Clinical trials must be conducted in accordance with the FDA and other applicable regulatory authorities’ legal requirements, regulations or
guidelines, and are subject to oversight by these governmental agencies and Ethics Committees or IRBs at the medical institutions where the clinical trials
are conducted. In addition, clinical trials must be conducted with supplies of our product candidates produced under cGMP requirements and other
regulations. Furthermore, we rely on CROs and clinical trial sites to ensure the proper and timely conduct of our clinical trials and while we have
agreements governing their committed activities, we have limited influence over their actual performance. We depend on our collaborators and on medical
institutions and CROs to conduct our clinical trials in compliance with good clinical practice, or GCP, requirements. To the extent our collaborators or the
CROs fail to enroll participants for our clinical trials, fail to conduct the study to GCP standards or are delayed for a significant time in the execution of
trials, including achieving full enrollment, we may be affected by increased costs, program delays or both, which may harm our business. In addition,
clinical trials that are conducted in countries outside the United States may subject us to further delays and expenses as a result of increased shipment costs,
additional regulatory requirements and the engagement of non-U.S. CROs, as well as expose us to risks associated with clinical investigators who are
unknown to the FDA, and different standards of diagnosis, screening and medical care.

Interim, topline or preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become
available and are subject to audit and verification procedures that could result in material changes in the final data.

From time to time, we may publicly disclose preliminary or topline or data from our preclinical studies and clinical trials, which is based on a

preliminary analysis of then-available data, and the results and related findings and conclusions are subject to change following a more comprehensive
review of the data related to the particular study or trial. We also make assumptions, estimations, calculations and conclusions as part of our analyses of
data, and we may not have received or had the opportunity to fully and carefully evaluate all data. As a result, the topline results that we report may differ
from future results of the same studies, or different conclusions or considerations may qualify such results, once additional data have been received and
fully evaluated. Topline data also remain subject to audit and verification procedures that may result in the final data being materially different from the
preliminary data we previously published. As a result, topline data should be viewed with caution until the final data are available. From time to time, we
may also disclose interim data from our clinical trials. Interim data from clinical trials that we may complete are subject to the risk that one or more of the
clinical outcomes may materially change as patient enrollment continues and more patient data become available. As a result, any interim/or preliminary
data should be viewed with caution until final data is available. Material adverse changes in the final data could result in significant harm to our business
prospects. Adverse differences between preliminary or interim data and final data could significantly harm our business prospects. Further, disclosure of
interim data by us or by our competitors could result in volatility in the price of our common stock.

Further, others, including regulatory agencies, may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or may
interpret or weigh the importance of data differently, which could impact the value of the particular program, the approvability or commercialization of the
particular product candidate or product and our company in general.

28

 
 
 
 
If the interim, topline, or preliminary data that we report differ from actual results, or if others, including regulatory authorities, disagree with the

conclusions reached, our ability to obtain approval for, and commercialize, our product candidates may be harmed, which could harm our business,
operating results, prospects or financial condition.

Our TriTAC and ProTriTAC platforms are unproven, novel classes of T cell engagers and may not result in approvable or marketable products,
which exposes us to unforeseen risks and makes it difficult for us to predict the time and cost of product development and potential for regulatory
approval.

We have not received regulatory approval for a TriTAC or ProTriTAC product candidates. We cannot be certain that our approach will lead to the

development of approvable or marketable products, alone or in combination with other therapies. In addition, our TriTACs and ProTriTACs may have
different effectiveness rates in various indications. Our approach involves using biologics to improve efficacy against solid tumors, which is unproven and
may not be successful. Further, our TriTAC and ProTriTAC technology could have less efficacy in tumor types with fewer T cells, such as pancreatic
cancer. While we believe TriTAC and ProTriTAC T cell engagers will demonstrate potent single-agent activity and therapeutic effect, immunotherapy
companies and standard of care continue to evolve toward the use of combination therapies and we may be unsuccessful in developing any of our product
candidates as monotherapies. With our TriTAC and ProTriTAC platforms, we have designed T cell engagers that incorporate the strengths of BiTEs and
improve upon their critical shortcomings. However, only one BiTE (Amgen’s Blincyto) has been approved for the treatment of cancer, and leveraging BiTE
technology may not result in approved therapies or be as successful as other forms of therapies. Finally, the FDA or other regulatory agencies may lack
experience in evaluating the safety and efficacy of our TriTACs or ProTriTACs, which could result in a longer than expected regulatory review process,
increase our expected development costs and delay or prevent commercialization of our product candidates.

Results of earlier preclinical studies of our product candidates may not be predictive of future trial results.

Success in preclinical studies does not ensure that later clinical trials will be successful. A number of companies in the biotechnology and
pharmaceutical industries have suffered significant setbacks in clinical trials, even after positive results in earlier preclinical studies. These setbacks have
been caused by, among other things, preclinical findings made while clinical trials were underway and safety or efficacy observations made in clinical
trials, including previously unreported adverse events. Notwithstanding any potential promising results in earlier studies, we cannot be certain that we will
not face similar setbacks. In addition, the results of our preclinical animal studies, including our non-human primate studies, may not be predictive of the
results of outcomes in human clinical trials. For example, while we did not observe unacceptable safety events in our preclinical testing of HPN536, given
the expression of MSLN on both normal and cancerous cells, we may observe unacceptable levels of toxicity when HPN536 is tested in humans. Product
candidates in later stages of clinical trials may fail to show the desired pharmacological properties or safety and efficacy traits despite having progressed
through preclinical studies.

We depend on enrollment of patients in our clinical trials for our product candidates. If we experience delays or difficulties enrolling in our clinical
trials, our research and development efforts and business, financial condition and results of operations could be materially adversely affected.

Successful and timely completion of clinical trials will require that we enroll a sufficient number of patient candidates. These trials and other trials

we conduct may be subject to delays as a result of patient enrollment taking longer than anticipated, patient withdrawal or adverse events. For example, we
have multiple ongoing Phase 1/2 clinical trials, which could generate adverse events that may cause us to delay these trials or halt further development.
While adverse events to date related to our clinical trials have not had a material impact on patient enrollment, our experience to date may differ from
future outcomes.

Our clinical trials will likely compete with other clinical trials that are in the same therapeutic areas as our product candidates, and this competition
may reduce the number and types of patients available to us, because some patients who might have opted to enroll in our trials may instead opt to enroll in
a trial being conducted by one of our competitors. Because the number of qualified clinical investigators and clinical trial sites is limited, we may conduct
some of our clinical trials at the same clinical trial sites that some of our competitors use, which could reduce the number of patients who are available for
our clinical trials at such clinical trial sites.

Patient enrollment depends on many factors, including the size and nature of the patient population, the severity of the disease under investigation,

eligibility criteria for the trial, the proximity of patients to clinical sites, the design of the clinical protocol, the ability to obtain and maintain patient
consents, the ability to recruit clinical trial investigators with the appropriate competencies and experience, the risk that patients enrolled in clinical trials
will drop out of the trials before the administration of our product candidates or trial completion, the availability of competing clinical trials, the availability
of new drugs approved for the indication the clinical trial is investigating, and clinicians’ and patients’ perceptions as to the potential advantages of the
drug being studied in relation to other available therapies. These factors may make it difficult for us to enroll enough patients to complete our clinical trials
in a timely and cost-effective manner. Delays in the completion of any clinical trial of our product candidates will increase our costs, slow down our
product candidate development and approval process and delay or potentially jeopardize our ability to commence product sales and generate revenue. In
addition, some of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of
regulatory approval of our product candidates.

29

 
 
 
Our product candidates may have serious adverse, undesirable or unacceptable side effects or other properties which may delay or prevent
marketing approval. If such side effects are identified during the development of our product candidates or following approval, if any, we may need
to abandon our development of such product candidates, the commercial profile of any approved label may be limited, or we may be subject to other
significant negative consequences following marketing approval, if any.

Undesirable side effects that may be caused by our product candidates could cause us or regulatory authorities to interrupt, delay or halt clinical
trials and could result in a more restrictive label or the delay or denial of regulatory approval by the FDA or other comparable foreign authorities. Our
product candidates target protein expression on tumor cells, which expression may also be present on healthy cells. Accordingly, our product candidates
may result in high or unacceptable levels of toxicity when tested in humans. Results of our trials could reveal a high and unacceptable severity and
prevalence of these or other side effects. In such an event, our trials could be suspended or terminated and the FDA or comparable foreign regulatory
authorities could order us to cease further development of or deny approval of our product candidates for any or all targeted indications. The drug-related
side effects could affect patient recruitment or the ability of enrolled patients to complete the trial or result in potential product liability claims. Any of these
occurrences may harm our business, financial condition and prospects significantly. Additionally, if any of our product candidates receives marketing
approval and we or others later identify undesirable or unacceptable side effects caused by such products, a number of potentially significant negative
consequences could result, including:

•

•

•

•

•

•

•

•

regulatory authorities may withdraw or limit approvals of such products and require us to take our approved product off the market;

regulatory authorities may require the addition of labeling statements, specific warnings, a contraindication or field alerts to physicians and
pharmacies, or issue other communications containing warnings or other safety information about the product;

regulatory authorities may require a medication guide outlining the risks of such side effects for distribution to patients, or that we implement
a risk evaluation and mitigation strategy, plan to ensure that the benefits of the product outweigh its risks;

we may be required to change the dose or the way the product is administered, conduct additional clinical trials or change the labeling of the
product;

we may be subject to limitations on how we may promote or manufacture the product;

sales of the product may decrease significantly;

we may be subject to litigation or product liability claims; and

our reputation may suffer.

Any of these events could prevent us, our collaborators or our potential future partners from achieving or maintaining market acceptance of the

affected product or could substantially increase commercialization costs and expenses, which in turn could delay or prevent us from generating significant
revenue from the sale of any products.

Monitoring safety of patients receiving our product candidates is challenging, which could adversely affect our ability to obtain regulatory approval
and commercialize.

For our ongoing clinical trial and planned clinical trials, we have and expect to contract with academic medical centers and hospitals experienced in

the assessment and management of toxicities arising during clinical trials. Nonetheless, these centers and hospitals may have difficulty observing patients
and treating toxicities, which may be more challenging due to personnel changes, inexperience, shift changes, house staff coverage or related issues. This
could lead to more severe or prolonged toxicities or even patient deaths, which could result in us or the FDA delaying, suspending or terminating one or
more of our clinical trials, and which could jeopardize regulatory approval. We also expect the centers using our product candidates, if approved, on a
commercial basis could similarly have difficulty in managing adverse events. Medicines used at centers to help manage adverse side effects of our product
candidates may not adequately control the side effects and/or may have a detrimental impact on the efficacy of the treatment. Use of these medicines may
increase with new physicians and centers administering our product candidates.

30

 
 
 
 
 
 
 
 
 
We may not be successful in our efforts to use and expand our technology platforms, including TriTAC and ProTriTAC, to build a pipeline of
product candidates.

A key element of our strategy is to use and expand our technology platforms, including TriTAC and ProTriTAC, to build a pipeline of product

candidates and progress these product candidates through clinical development for the treatment of a variety of different types of diseases. Although our
research and development efforts to date have resulted in a pipeline of product candidates directed at various cancers, we may not be able to develop
product candidates that are safe and effective. Even if we are successful in continuing to build our pipeline, the potential product candidates that we identify
may not be suitable for clinical development, including as a result of being shown to have harmful side effects or other characteristics that indicate that they
are unlikely to be products that will receive marketing approval and achieve market acceptance. If we do not continue to successfully develop and begin to
commercialize product candidates, we will face difficulty in obtaining product revenues in future periods, which could result in significant harm to our
financial position and adversely affect our share price.

Risks Related to Our Financial Condition and Need for Additional Capital

We are an early clinical-stage company and have incurred significant losses since our inception. We expect to incur losses for the foreseeable future
and may never achieve or maintain profitability.

We are an early clinical-stage immunotherapy company with a limited operating history. We have incurred net losses of $55.6 million, $27.4 million,

and $16.8 million for the years ended December 31, 2019, 2018, and 2017, respectively. As of December 31, 2019, we had an accumulated loss of
$118.2 million. Our losses have resulted principally from expenses incurred in research and development of our product candidates and from management
and administrative costs and other expenses that we have incurred while building our business infrastructure. We expect to continue to incur significant
operating losses for the foreseeable future as we continue our research and development efforts and seek to obtain regulatory approval and
commercialization of our product candidates. We anticipate that our expenses will increase substantially as we:

•

•

•

•

•

•

•

•

•

•

•

•

conduct our ongoing Phase 1 trial of HPN424 for the treatment of metastatic castration-resistant prostate cancer, or mCRPC;  

conduct our ongoing Phase 1/2a trial of HPN536 for the treatment of ovarian cancer and other MSLN-expressing tumors;

initiate a Phase 1/2 trial of HPN217 for the treatment of multiple myeloma;

initiate a clinical trial of HPN328 for the treatment of small cell lung cancer;

continue the research and development of our other product candidates;

continue the development of our product candidates beyond Phase 1 trials;

seek to enhance our TriTAC and ProTriTAC platforms and discover and develop additional product candidates;

apply for regulatory approvals for any product candidates that successfully complete clinical trials;

potentially establish a manufacturing, sales, marketing and distribution infrastructure to produce and commercialize any products for which
we may obtain regulatory approvals;

maintain, expand and protect our intellectual property portfolio;

add clinical, scientific, operational, financial and management information systems and personnel, including personnel to support our product
development, potential future commercialization efforts and operations as a public company; and

experience any delays or encounter any issues with any of the above, including but not limited to failed studies, complex results,
manufacturing challenges, safety issues or other regulatory challenges.

We have financed our operations to date primarily through private financings, payments received under collaboration and licensing agreements, and
the proceeds from our initial public offering, which was completed in February 2019. We have devoted a significant portion of our financial resources and
efforts to developing our TriTAC and ProTriTAC platforms, identifying potential product candidates, conducting preclinical studies of a variety of product
candidates, and preparing for and conducting clinical trials of product candidates. We are in the early stages of development of our product candidates, and
we have not completed development and commercialization of any TriTAC or ProTriTAC product candidate.

31

 
 
 
 
 
 
 
 
 
 
 
 
 
 
To become and remain profitable, we must succeed in developing and eventually commercializing products that generate significant revenue. This

will require us to be successful in a range of challenging activities, including completing preclinical testing and clinical trials of our product candidates,
discovering and developing additional product candidates, obtaining regulatory approval for any product candidates that successfully complete clinical
trials, accessing manufacturing capacity, establishing marketing capabilities and ultimately selling any products for which we may obtain regulatory
approval. We are only in the preliminary stages of most of these activities. We may never succeed in these activities and, even if we do, may never generate
revenue that is significant enough to achieve profitability.

Because of the numerous risks and uncertainties associated with pharmaceutical products and biological development, we are unable to accurately

predict the timing or amount of increased expenses or when, or if, we will be able to achieve profitability. If we are required by the FDA or other regulatory
authorities to perform studies in addition to those we currently anticipate, or if there are any delays in completing our clinical trials or the development of
any of our product candidates, our expenses could increase and commercial revenue could be further delayed and more uncertain.

Even if we do generate product sales or royalties, we may never achieve or sustain profitability on a quarterly or annual basis. Our failure to sustain

profitability would depress the market price of our common stock and could impair our ability to raise capital, expand our business, diversify our product
offerings and continue our operations.

We will require additional funding in order to complete development of our product candidates and commercialize our products, if approved. If we
are unable to raise capital when needed, we could be forced to delay, reduce or eliminate our product development programs or commercialization
efforts.

We expect our expenses to increase in connection with our ongoing activities, particularly as we conduct our ongoing clinical trials of HPN424 and
HPN536, and initial clinical development for HPN217 and HPN328, and as we continue to research and develop other potential technologies and product
candidates.

In addition, if we obtain regulatory approval for any of our product candidates, we expect to incur significant commercialization expenses related to

product manufacturing, marketing, sales and distribution. Furthermore, we will incur additional costs associated with operating as a public company.
Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise capital when
needed or on attractive terms, we could be forced to delay, reduce or eliminate our research and development programs or any future commercialization
efforts.

Based on our current business plans, we believe that our existing cash and cash equivalents will be sufficient to fund our planned operations for at
least the next 12 months from the date of this Annual Report. We have based this estimate on assumptions that may prove to be wrong, and we could use
our capital resources sooner than we currently expect, requiring us to seek additional funds sooner than planned, through public or private equity or debt
financings or other sources, such as strategic collaborations. Such financing may result in dilution to stockholders, the imposition of burdensome debt
covenants and repayment obligations or other restrictions that may affect our business. If we raise additional funds through licensing or collaboration
arrangements with third parties, we may have to relinquish valuable rights to our product candidates, or grant licenses on terms that are not favorable to us.
In addition, we may seek additional capital due to favorable market conditions or strategic considerations even if we believe we have sufficient funds for
our current or future operating plans. Attempting to secure additional financing may divert our management from our day-to-day activities, which may
adversely affect our ability to develop our product candidates. Our future capital requirements will depend on many factors, including:

•

•

•

•

•

•

•

the scope, progress, results and costs of developing our product candidates, and conducting preclinical studies and clinical trials, including
our Phase 1 trial of HPN424 and Phase 1/2a trial of HPN536 and our planned clinical trials of HPN217 and HPN328;

the costs, timing and outcome of regulatory review of any of our product candidates;

the cost of manufacturing clinical supplies of our product candidates;

the scope, progress, results and costs of preclinical development, laboratory testing and clinical trials for our product candidates;

the costs and timing of future commercialization activities, including manufacturing, marketing, sales and distribution, for any of our product
candidates for which we receive marketing approval;

the timing and amount of any milestone, royalty or other payments we are required to make pursuant to any current or future collaboration or
license agreements;

the progress of our collaborations with AbbVie to develop product candidates;

32

 
 
 
 
 
 
 
 
•

•

•

•

•

•

the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and
defending any intellectual property-related claims, including any claims by third parties that we are infringing upon their intellectual property
rights;

our ability to maintain existing, and establish new, strategic collaborations, licensing or other arrangements and the financial terms of any
such agreements, including the timing and amount of any future milestone, royalty or other payments due under any such agreement;

the cost of building a sales force in anticipation of product commercialization;

the revenue, if any, received from commercial sales of our product candidates for which we receive marketing approval;

the effect of competing technological and market developments; and

the extent to which we acquire or invest in business, products and technologies, including our collaboration with AbbVie and any other
licensing or collaboration arrangements for any of our product candidates.

Additional funds may not be available when we need them, on terms that are acceptable to us or at all. If adequate funds are not available to us on a

timely basis, we could be required to:

•

•

delay, limit, reduce or terminate preclinical studies, clinical trials or other research and development activities or eliminate one or more of our
development programs altogether; or

delay, limit, reduce or terminate our efforts to access manufacturing capacity, establish sales and marketing capabilities or other activities that
may be necessary to commercialize our product candidates, or reduce our flexibility in developing or maintaining our sales and marketing
strategy.

For related information, see “—Raising additional capital may cause dilution to our stockholders, restrict our operations or require us to relinquish

rights to our technologies or product candidates” below.

We depend heavily on the success of our current product candidates, and we cannot guarantee that any of these product candidates will receive
regulatory approval, which is necessary before they can be commercialized. If we, or any strategic partners we may enter into collaboration
agreements with for the development and commercialization of our product candidates, are unable to commercialize our product candidates, or
experience significant delays in doing so, our business, financial condition and results of operations will be materially adversely affected.

We have invested a significant portion of our efforts and financial resources in the development of our current product candidates. Our ability to

generate product and royalty revenues, which we do not expect will occur for at least the next several years, if ever, will depend heavily on the successful
development and eventual commercialization of these product candidates, which may never occur. We currently generate no revenues from sales of any
products, and we may never be able to develop or commercialize a marketable product. Each of our product candidates will require significant clinical
development, management of clinical, preclinical and manufacturing activities, regulatory approval in multiple jurisdictions, obtaining manufacturing
supply, including commercial manufacturing supply, as well as requiring us to build a commercial organization, and make substantial investment and
significant marketing efforts before we generate any revenues from product sales. We are not permitted to market or promote any of our product candidates
before we receive regulatory approval from the FDA or comparable foreign regulatory authorities, and we may never receive such regulatory approval for
any of our product candidates. The success of our product candidates will depend on several factors, including the following:

•

•

•

for product candidates which we may license to others, the successful efforts of those parties in completing clinical trials of, receipt of
regulatory approval for and commercialization of such product candidates;

for product candidates to which we retain rights, completion of preclinical studies and clinical trials of, receipt of marketing approvals for,
establishment of commercial manufacturing supplies of and successful commercialization of such product candidates; and

for all of our product candidates, if and when approved, acceptance of such product candidates by patients, the medical community and third-
party payors, effectively competing with other therapies, a continued acceptable safety profile following approval and qualifying for,
maintaining, enforcing and defending our intellectual property rights and claims.

If we do not achieve one or more of these factors in a timely manner or at all, we could experience significant delays or an inability to successfully

commercialize our product candidates, which would materially adversely affect our business, financial condition and results of operations.

33

 
 
 
 
 
 
 
 
 
 
 
 
We have not previously submitted a Biologics License Application, or BLA, to the FDA or similar regulatory approval filings to comparable foreign

authorities, for any product candidate, and we cannot be certain that any of our product candidates will be successful in clinical trials or receive regulatory
approval. Further, our product candidates may not receive regulatory approval even if they are successful in clinical trials. If we do not receive regulatory
approvals for our product candidates, we may not be able to continue our operations. Even if we successfully obtain regulatory approvals to market one or
more of our product candidates, our revenues will be dependent, in part, upon the size of the markets in the territories for which we gain regulatory
approval and have commercial rights. If the markets for patient subsets that we are targeting are not as significant as we estimate, we may not generate
significant revenues from sales of such products, if approved.

We plan to seek regulatory approval to commercialize our product candidates in the United States and, potentially, in other countries. While the

scope of regulatory approval is similar in other countries, to obtain separate regulatory approval in many other countries we must comply with the
numerous and varying regulatory requirements of such countries regarding safety and efficacy and governing, among other things, clinical trials and
commercial sales, pricing and distribution of our product candidates, and we cannot predict success in these jurisdictions.

Our limited operating history may make it difficult for you to evaluate the success of our business to date and to assess our future viability.

Since commencing operations in 2015, we have devoted a significant portion of our resources to developing our product candidates, our other

research and development efforts, building our intellectual property portfolio, raising capital and providing general and administrative support for these
operations. While we have ongoing early stage clinical trials, we have not completed any clinical trials for any product candidate. We have not yet
demonstrated our ability to successfully complete any clinical trials (including any Phase 3 or other pivotal clinical trials), obtain regulatory approvals,
manufacture a commercial scale product or arrange for a third party to do so on our behalf or conduct sales and marketing activities necessary for
successful product commercialization. Additionally, we expect our financial condition and operating results to continue to fluctuate significantly from
period to period due to a variety of factors, many of which are beyond our control. Consequently, any predictions you make about our future success or
viability may not be as accurate as they could be if we had a longer operating history.

Raising additional capital may cause dilution to our stockholders, restrict our operations or require us to relinquish rights to our technologies or
product candidates.

Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through equity or debt financings and

upfront and milestone payments, if any, received under our collaborations with AbbVie and any other future licenses or collaborations, together with our
existing cash and cash equivalents. In order to accomplish our business objectives and further develop our product pipeline, we will, however, need to seek
additional funds. If we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted, and the
terms of these securities may include liquidation or other preferences that adversely affect your rights as a holder of our common stock. In addition, the
possibility of such issuance may cause the market price of our common stock to decline. Debt financing, if available, may result in increased fixed payment
obligations and involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt,
making capital expenditures, declaring dividends or acquiring, selling or licensing intellectual property rights, which could adversely impact our ability to
conduct our business.

If we raise additional funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we
may have to relinquish valuable rights to our intellectual property, technologies, future revenue streams or product candidates or grant licenses on terms
that may not be favorable to us. We could also be required to seek funds through arrangements with collaborators or others at an earlier stage than
otherwise would be desirable. Any of these occurrences may have a material adverse effect on our business, operating results and prospects.

Any additional fundraising efforts may divert our management from their day-to-day activities, which may adversely affect our ability to develop

and commercialize our product candidates. In addition, we cannot guarantee that future financing will be available in sufficient amounts or on terms
acceptable to us, if at all. If we are unable to obtain funding on a timely basis, we may be required to significantly curtail, delay or discontinue one or more
of our research or development programs or the commercialization of any of our product candidates, or be unable to expand our operations or otherwise
capitalize on our business opportunities, as desired, which could materially affect our business, financial condition and results of operations.

34

 
Risks Related to Our Regulatory Environment

Our business operations and current and future relationships with healthcare professionals, principal investigators, consultants, vendors, customers
and third-party payors in the United States and elsewhere are subject to applicable anti-kickback, fraud and abuse, false claims, physician payment
transparency, health information privacy and security and other healthcare laws and regulations, which could expose us to substantial penalties.

Healthcare providers, healthcare facilities and institutions, physicians and third-party payors in the United States and elsewhere will play a primary
role in the recommendation and prescription of any product candidates for which we obtain marketing approval. Our current and future arrangements with
healthcare professionals, healthcare facilities and institutions, principal investigators, consultants, customers and third-party payors may expose us to
broadly applicable fraud and abuse and other healthcare laws, including, without limitation, the federal Anti-Kickback Statute and the federal False Claims
Act, that may constrain the business or financial arrangements and relationships through which we sell, market and distribute any product candidates for
which we obtain marketing approval. In addition, we may be subject to physician payment transparency laws and patient privacy and security regulation by
the federal government and by the states and foreign jurisdictions in which we conduct our business. The applicable federal, state and foreign healthcare
laws that affect our ability to operate include, but are not limited to, the following:

•

•

•

•

•

•

the federal Anti-Kickback Statute, which prohibits, among other things, persons or entities from knowingly and willfully soliciting, offering,
receiving or providing any remuneration (including any kickback, bribe, or certain rebate), directly or indirectly, overtly or covertly, in cash
or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, lease, order or recommendation of, any
good, facility, item or service, for which payment may be made, in whole or in part, under any U.S. federal healthcare program, such as
Medicare and Medicaid. The term “remuneration” has been broadly interpreted to include anything of value, including stock options. The
federal Anti-Kickback Statute has also been interpreted to apply to arrangements between pharmaceutical manufacturers on the one hand and
prescribers, purchasers and formulary managers on the other the other hand. Any arrangements with prescribers must be for bona fide
services and compensated at fair market value. A person or entity does not need to have actual knowledge of the statute or specific intent to
violate it in order to have committed a violation;

the U.S. federal civil and criminal false claims, including the False Claims Act, which prohibit, among other things, including through civil
whistleblower or qui tam actions, and civil monetary penalties laws, including the civil False Claims Act, which prohibit, among other things,
individuals or entities from knowingly presenting, or causing to be presented, to the U.S. federal government, claims for payment or approval
that are false or fraudulent, knowingly making, using or causing to be made or used, a false record or statement material to a false or
fraudulent claim, or from knowingly making a false statement to avoid, decrease or conceal an obligation to pay money to the U.S. federal
government. Pharmaceutical manufacturers can cause false claims to be presented to the U.S. federal government by, among other things,
engaging in impermissible marketing practices, such as the off-label promotion of a product for an indication for which it has not received
FDA approval. In addition, the government may assert that a claim including items and services resulting from a violation of the federal Anti-
Kickback Statute constitutes a false or fraudulent claim for purposes of the civil False Claims Act;

the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which imposes criminal and civil liability for, among
other things, knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program, or knowingly
and willfully falsifying, concealing or covering up a material fact or making any materially false statement, in connection with the delivery
of, or payment for, healthcare benefits, items or services. Similar to the federal Anti-Kickback Statute, a person or entity does not need to
have actual knowledge of the healthcare fraud statute implemented under HIPAA or specific intent to violate it in order to have committed a
violation;

HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009, or HITECH, and their respective
implementing regulations, which also imposes certain obligations, including mandatory contractual terms, with respect to safeguarding the
privacy and security of individually identifiable health information of covered entities subject to the rule, such as health plans, healthcare
clearinghouses and certain healthcare providers as well as their business associates, independent contractors of a covered entity that perform
certain services involving the use or disclosure of individually identifiable health information on its behalf;

the U.S. Federal Food, Drug, and Cosmetic Act, which prohibits, among other things, the adulteration or misbranding of drugs, biologics and
medical devices;

the U.S. Public Health Service Act, which prohibits, among other things, the introduction into interstate commerce of a biological product
unless a biologics license is in effect for that product;

35

 
 
 
 
 
 
 
•

•

•

the U.S. Physician Payments Sunshine Act and its implementing regulations, which requires, among other things, certain manufacturers of
drugs, devices, biologics and medical supplies that are reimbursable under Medicare, Medicaid, or the Children’s Health Insurance Program,
with specific exceptions, to report annually to the Centers for Medicare and Medicaid Services, or CMS, information related to certain
payments and other transfers of value to physicians, as defined by such law, and teaching hospitals, as well as ownership and investment
interests held by physicians and their immediate family members;

analogous U.S. state laws and regulations, including: state anti-kickback and false claims laws, which may apply to our business practices,
including but not limited to, research, distribution, sales and marketing arrangements and claims involving healthcare items or services
reimbursed by any third-party payor, including private insurers; state laws that require pharmaceutical companies to comply with the
pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the U.S. federal
government, or otherwise restrict payments that may be made to healthcare providers and other potential referral sources; state laws and
regulations that require drug manufacturers to file reports relating to pricing and marketing information, which requires tracking gifts and
other remuneration and items of value provided to healthcare professionals and entities; state and local laws requiring the registration of
pharmaceutical sales representatives; and state laws governing the privacy and security of health information in certain circumstances, many
of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts; and

similar healthcare laws and regulations in foreign jurisdictions, including reporting requirements detailing interactions with and payments to
healthcare providers.

We may also be subject to federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that

could potentially harm consumers.

Ensuring that our internal operations and future business arrangements with third parties comply with applicable healthcare laws and regulations

will involve substantial costs. We have adopted a code of business conduct and ethics, but it is not always possible to identify and deter employee
misconduct or business noncompliance, and the precautions we take to detect and prevent inappropriate conduct may not be effective in controlling
unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in
compliance with such laws or regulations. Efforts to ensure that our business arrangements will comply with applicable healthcare laws may involve
substantial costs. We have entered into consulting and scientific advisory board arrangements with physicians and other healthcare providers, including
some who could influence the use of our product candidates, if approved. Compensation under some of these arrangements includes the provision of stock
or stock options in addition to cash consideration. Because of the complex and far-reaching nature of these laws, it is possible that governmental authorities
could conclude that our payments to physicians may not be fair market value for bona fide services or that our business practices do not comply with
current or future statutes, regulations, agency guidance or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our
operations are found to be in violation of any of the laws described above or any other governmental laws and regulations that may apply to us, we may be
subject to significant penalties, including civil, criminal and administrative penalties, damages, fines, exclusion from government-funded healthcare
programs, such as Medicare and Medicaid or similar programs in other countries or jurisdictions, integrity oversight and reporting obligations to resolve
allegations of non-compliance, disgorgement, imprisonment, contractual damages, reputational harm, diminished profits and the curtailment or
restructuring of our operations. If any of the physicians or other providers or entities with whom we expect to do business are found to not be in compliance
with applicable laws, they may be subject to criminal, civil or administrative sanctions, including exclusions from government funded healthcare programs
and imprisonment, which could affect our ability to operate our business. Further, defending against any such actions can be costly, time-consuming and
may require significant personnel resources. Therefore, even if we are successful in defending against any such actions that may be brought against us, our
business may be impaired.

The development and commercialization of biopharmaceutical products is subject to extensive regulation, and the regulatory approval processes of
the FDA and comparable foreign authorities are lengthy, time consuming and inherently unpredictable. If we are ultimately unable to obtain
regulatory approval for our product candidates on a timely basis if at all, our business will be substantially harmed.

The clinical development, manufacturing, labeling, packaging, storage, recordkeeping, advertising, promotion, export, import, marketing,
distribution, adverse event reporting, including the submission of safety and other post-marketing information and reports, and other possible activities
relating to our product candidates are subject to extensive regulation. In the United States, marketing approval of biologics requires the submission of a
BLA to the FDA, and we are not permitted to market any product candidate in the United States until we obtain approval from the FDA of the BLA for that
product. A BLA must be supported by extensive clinical and preclinical data, as well as extensive information regarding pharmacology, chemistry,
manufacturing and controls. Outside the United States, many comparable foreign regulatory authorities employ similar approval processes.

36

 
 
 
 
FDA approval is not guaranteed, and the time required to obtain approval by the FDA and comparable foreign authorities is unpredictable but

typically takes many years following the commencement of clinical trials and depends upon numerous factors, including the substantial discretion of the
regulatory authorities. In addition, approval policies, regulations, or the type and amount of clinical data necessary to gain approval may change during the
course of a product candidate’s clinical development and may vary among jurisdictions. We have not obtained regulatory approval for any product
candidate and it is possible that none of our existing product candidates or any product candidates we may seek to develop in the future will ever obtain
regulatory approval.

Our product candidates could fail to receive regulatory approval for many reasons, including the following:

•

•

•

•

•

•

•

•

•

the FDA or comparable foreign regulatory authorities may disagree with the design or implementation of our clinical trials;

we may be unable to demonstrate to the satisfaction of the FDA or comparable foreign regulatory authorities that a product candidate is safe
and effective for its proposed indication;

the results of clinical trials may not meet the level of statistical significance required by the FDA or comparable foreign regulatory authorities
for approval;

we may be unable to demonstrate that a product candidate’s clinical and other benefits outweigh its safety risks;

the FDA or comparable foreign regulatory authorities may disagree with our interpretation of data from preclinical studies or clinical trials;

the data collected from clinical trials of our product candidates may not be sufficient to support the submission of a BLA or other submission
or to obtain regulatory approval in the United States or elsewhere, or regulatory authorities may not accept a submission due to, among other
reasons, the content or formatting of the submission;

the FDA or comparable foreign regulatory authorities may fail to approve the manufacturing processes or facilities of third-party
manufacturers with which we contract for clinical and commercial supplies;

the FDA or comparable foreign regulatory authorities may fail to approve the companion diagnostics we contemplate developing with
collaborators; and

the approval policies or regulations of the FDA or comparable foreign regulatory authorities may significantly change in a manner rendering
our clinical data insufficient for approval.

This lengthy approval process, as well as the unpredictability of future clinical trial results, may result in our failing to obtain regulatory approval to

market any of our product candidates, which would significantly harm our business, results of operations and prospects. The FDA and other regulatory
authorities have substantial discretion in the approval process, and determining when or whether regulatory approval will be obtained for any of our
product candidates. For example, regulatory authorities in various jurisdictions have in the past had, and may in the future have, differing requirements for,
interpretations of and opinions on our preclinical and clinical data. As a result, we may be required to conduct additional preclinical studies, alter our
proposed clinical trial designs or conduct additional clinical trials to satisfy the regulatory authorities in each of the jurisdictions in which we hope to
conduct clinical trials and develop and market our products, if approved. Further, even if we believe the data collected from clinical trials of our product
candidates are promising, such data may not be sufficient to support approval by the FDA or any other regulatory authority.

In addition, even if we were to obtain approval, regulatory authorities may approve any of our product candidates for fewer or more limited
indications than we request, may not approve the price we intend to charge for our products, may grant approval contingent on the performance of costly
post-marketing clinical trials, or may approve a product candidate with a label that does not include the labeling claims necessary or desirable for the
successful commercialization of that product candidate. Any of the foregoing scenarios could materially harm the commercial prospects for our product
candidates.

Even if our product candidates obtain regulatory approval, we will be subject to ongoing obligations and continued regulatory review, which may
result in significant additional expense. Additionally, our product candidates, if approved, could be subject to labeling and other restrictions and
market withdrawal and we may be subject to penalties if we fail to comply with regulatory requirements or experience unanticipated problems with
our products.

If the FDA or a comparable foreign regulatory authority approves any of our product candidates, the manufacturing processes, labeling, packaging,

distribution, import, export, adverse event reporting, storage, advertising, promotion and recordkeeping for the product will be subject to extensive and
ongoing regulatory requirements. These requirements include submissions of safety and other post-marketing information and reports, registration, as well
as continued compliance with cGMPs and GCPs for any clinical trials that we conduct post-approval, all of which may result in significant expense and
limit our ability to commercialize such products. In addition, any regulatory approvals that we receive for our product candidates may also be subject to
limitations on the approved indicated uses for which the product may be marketed or to the conditions of approval, or contain requirements for potentially
costly post-marketing testing, including Phase 4 clinical trials, and surveillance to monitor the safety and efficacy of the product candidate.

37

 
 
 
 
 
 
 
 
 
 
Manufacturers and manufacturers’ facilities are required to comply with extensive FDA and comparable foreign regulatory authority requirements,

including ensuring that quality control and manufacturing procedures conform to cGMP regulations. As such, we and our contract manufacturers will be
subject to continual review and inspections to assess compliance with cGMP and adherence to commitments made in any approved marketing application.
Accordingly, we and others with whom we work must continue to expend time, money, and effort in all areas of regulatory compliance, including
manufacturing, production, and quality control.

If there are changes in the application of legislation or regulatory policies, or if problems are discovered with a product or our manufacture of a

product, or if we or one of our distributors, licensees or co-marketers fails to comply with regulatory requirements, the regulators could take various
actions. These include imposing fines on us, imposing restrictions on the product or its manufacture and requiring us to recall or remove the product from
the market. The regulators could also suspend or withdraw our marketing authorizations, requiring us to conduct additional clinical trials, change our
product labeling or submit additional applications for marketing authorization. If any of these events occurs, our ability to sell such product may be
impaired, and we may incur substantial additional expense to comply with regulatory requirements, which could materially adversely affect our business,
financial condition and results of operations.

In addition, if we have any product candidate approved, our product labeling, advertising and promotion will be subject to regulatory requirements

and continuing regulatory review. The FDA strictly regulates the promotional claims that may be made about pharmaceutical products. In particular, a
product may not be promoted for uses that are not approved by the FDA as reflected in the product’s approved labeling. If we receive marketing approval
for a product candidate, physicians may nevertheless prescribe it to their patients in a manner that is inconsistent with the approved label. If we are found to
have promoted such off-label uses, we may become subject to significant liability. The FDA and other agencies actively enforce the laws and regulations
prohibiting the promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to significant sanctions.
The federal government has levied large civil and criminal fines against companies for alleged improper promotion and has enjoined several companies
from engaging in off-label promotion. The FDA has also requested that companies enter into consent decrees or permanent injunctions under which
specified promotional conduct is changed or curtailed.

If a regulatory agency discovers previously unknown problems with a product, such as adverse events of unanticipated severity or frequency, or

problems with the facility where the product is manufactured, or disagrees with the promotion, marketing or labeling of a product, such regulatory agency
may impose restrictions on that product or us, including requiring withdrawal of the product from the market. If we fail to comply with applicable
regulatory requirements, a regulatory agency or enforcement authority may, among other things:

•

•

•

•

•

•

•

issue warning letters;

impose civil or criminal penalties;

suspend or withdraw regulatory approval;

suspend any of our preclinical studies and clinical trials;

refuse to approve pending applications or supplements to approved applications submitted by us;

impose restrictions on our operations, including closing our contract manufacturers’ facilities; or

seize or detain products, or require a product recall.

Any government investigation of alleged violations of law could require us to expend significant time and resources in response, and could generate

negative publicity. Any failure to comply with ongoing regulatory requirements may significantly and adversely affect our ability to commercialize and
generate revenue from our products, if approved. If regulatory sanctions are applied or if regulatory approval is withdrawn, the value of our company and
our operating results will be adversely affected.

Moreover, the policies of the FDA and of other regulatory authorities may change and additional government regulations may be enacted that could
prevent, limit or delay regulatory approval of our product candidates. We cannot predict the likelihood, nature or extent of government regulation that may
arise from future legislation or administrative or executive action, either in the United States or abroad. For example, certain policies of the Trump
administration may impact our business and industry. Namely, the Trump administration has taken several executive actions, including the issuance of a
number of Executive Orders, that could impose significant burdens on, or otherwise materially delay, the FDA’s ability to engage in routine oversight
activities such as implementing statutes through rulemaking, issuance of guidance, and review and approval of marketing applications. It is difficult to
predict how these orders will be implemented, and the extent to which they will impact the FDA’s ability to exercise its regulatory authority. If these
executive actions impose restrictions on the FDA’s ability to engage in oversight and implementation activities in the normal course, our business may be
negatively impacted. In addition, if we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if
we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and we may not achieve or sustain
profitability.

38

 
 
 
 
 
 
 
 
We may pursue the development of our product candidates in combination with other approved therapeutics. If the FDA revokes approval of any
such therapeutic, or if safety, efficacy, manufacturing or supply issues arise with any therapeutic that we use in combination with one of our
product candidates in the future, we may be unable to further develop and/or market our product candidate or we may experience significant
regulatory delays or supply shortages, and our business could be materially harmed.

We may pursue the development of our product candidates in combination with other approved therapeutics, and we may commence clinical trials

of our product candidates in combination with other approved therapeutics, in the future. In such a case, we will not have developed or obtained regulatory
approval for, nor will we manufacture or sell, any of these approved therapeutics. In addition, the combinations will likely not have been previously tested
and may, among other things, fail to demonstrate synergistic activity, may fail to achieve superior outcomes relative to the use of single agents or other
combination therapies, may exacerbate adverse events associated with one of our product candidates when used as monotherapy or may fail to demonstrate
sufficient safety or efficacy traits in clinical trials to enable us to complete those clinical trials or obtain marketing approval for the combination therapy.

If the FDA revokes its approval of any combination therapeutic, we would not be able to continue clinical development of or market any product

candidate in combination with such revoked therapeutic. If safety or efficacy issues were to arise with therapeutics that we seek to combine with, we could
experience significant regulatory delays, and the FDA could require us to redesign or terminate the applicable clinical trials. In addition, we may need, for
supply, data referencing or other purposes, to collaborate or otherwise engage with the companies who market these approved therapeutics. If we are unable
to do so on a timely basis, on acceptable terms or at all, we may have to curtail the development of a product candidate or indication, reduce or delay its
development program, delay its potential commercialization or reduce the scope of any sales or marketing activities.

Because we are subject to environmental, health and safety laws and regulations, we may become exposed to liability and substantial expenses in
connection with environmental compliance or remediation activities which may adversely affect our business and financial condition.

Our operations, including our research, development, testing and manufacturing activities, are subject to numerous environmental, health and safety
laws and regulations. These laws and regulations govern, among other things, the controlled use, handling, release and disposal of, and the maintenance of
a registry for, hazardous materials and biological materials, such as chemical solvents, human cells, carcinogenic compounds, mutagenic compounds and
compounds that have a toxic effect on reproduction, laboratory procedures and exposure to blood-borne pathogens. If we fail to comply with such laws and
regulations, we could be subject to fines or other sanctions. Although we believe our procedures for using, handling, storing and disposing of these
materials comply with legally prescribed standards, we cannot completely eliminate the risk of contamination or injury resulting from hazardous and
biological materials. As a result of any such contamination or injury, we may incur liability or local, city, state or federal authorities may curtail the use of
these materials and interrupt our business operations. In the event of an accident, we could be held liable for damages or penalized with fines, and the
liability could exceed our resources.

As with other companies engaged in activities similar to ours, we face a risk of environmental liability inherent in our current and historical
activities, including liability relating to releases of or exposure to hazardous or biological materials. Environmental, health and safety laws and regulations
are becoming more stringent. We may be required to incur substantial expenses in connection with future environmental compliance or remediation
activities, in which case, our production and development efforts may be interrupted or delayed and our financial condition and results of operations may
be materially adversely affected.

Our employees, independent contractors, principal investigators, consultants, commercial partners and vendors may engage in misconduct or other
improper activities, including non-compliance with regulatory standards and requirements.

We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees could include intentional failures to comply with FDA

regulations, provide accurate information to the FDA, comply with manufacturing standards we may establish, comply with federal and state healthcare
fraud and abuse laws and regulations, report financial information or data accurately or disclose unauthorized activities to us. In particular, sales, marketing
and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, kickbacks, self-dealing and
other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales
commission, customer incentive programs and other business arrangements. Employee misconduct could also involve the improper use of information
obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to our reputation. It is not always possible to identify
and deter employee misconduct, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged
risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws
or regulations. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could
have a material and adverse effect on our business, financial condition, results of operations and prospects, including the imposition of significant civil,
criminal and administrative penalties, damages, monetary fines, individual imprisonment, disgorgement of profits, possible exclusion from participation in
Medicare, Medicaid and other federal healthcare programs, contractual damages, reputational harm, diminished profits and future earnings, additional
reporting or oversight obligations if we become subject to a corporate integrity agreement or other agreement to resolve allegations of non-compliance with
the law and curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and pursue our strategy.

39

 
Current and future legislation may increase the difficulty and cost for us and any future collaborators to obtain marketing approval of and
commercialize our product candidates and affect the prices we, or they, may obtain.

In the United States and other jurisdictions, there have been, and we expect there will continue to be, a number of legislative and regulatory changes
and proposed changes to the healthcare system that could affect our future results of operations. In particular, there have been and continue to be a number
of initiatives at the U.S. federal and state levels that seek to reduce healthcare costs and improve the quality of healthcare. For example, in March 2010, the
Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, or collectively the ACA, was enacted, which
substantially changed the way healthcare is financed by both governmental and private payors. Among the provisions of the ACA of importance to the
pharmaceutical and biotechnology industries are the following:

•

•

•

•

•

•

•

•

•

an annual, nondeductible fee on any entity that manufactures or imports certain specified branded prescription drugs and biologic agents
apportioned among these entities according to their market share in some government healthcare programs;

an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program, to 23.1% and 13% of the
average manufacturer price for most branded and generic drugs, respectively and capped the total rebate amount for innovator drugs at 100%
of the Average Manufacturer Price,  

a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for certain drugs and
biologics, including our product candidates, that are inhaled, infused, instilled, implanted or injected;

extension of manufacturers’ Medicaid rebate liability to covered drugs dispensed to individuals who are enrolled in Medicaid managed care
organizations;

expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to additional
individuals and by adding new mandatory eligibility categories for individuals with income at or below 133% of the federal poverty level,
thereby potentially increasing manufacturers’ Medicaid rebate liability;

expansion of the entities eligible for discounts under the Public Health program;

a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness
research, along with funding for such research;

establishment of a Center for Medicare Innovation at CMS to test innovative payment and service delivery models to lower Medicare and
Medicaid spending, potentially including prescription drug spending; and

a licensure framework for follow on biologic products.

There remain judicial and Congressional challenges to certain aspects of the ACA, as well as efforts by the Trump administration to repeal or
replace certain aspects of the. For example, the Tax Cuts and Jobs Act of 2017, or the Tax Act, was enacted, which includes a provision repealing, effective
January 1, 2019, the tax-based shared responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health coverage
for all or part of a year that is commonly referred to as the “individual mandate.” Since the enactment of the Tax Act, there have been additional
amendments to certain provisions of the ACA. On December 14, 2018, a Texas U.S. District Court Judge ruled that the ACA is unconstitutional in its
entirety because the “individual mandate” was repealed by Congress as part of the Tax Act. Additionally, on December 18, 2019, the U.S. Court of Appeals
for the 5th Circuit upheld the District Court ruling that the individual mandate was unconstitutional and remanded the case back to the District Court to
determine whether the remaining provisions of the ACA are invalid as well. It is unclear how this decision, future decisions, subsequent appeals, and other
efforts to repeal and replace the ACA will impact the ACA and our business.

In addition, other legislative changes have been proposed and adopted in the United States since the ACA was enacted. In August 2011, the Budget
Control Act of 2011, among other things, led to aggregate reductions of Medicare payments to providers of 2% per fiscal year. These reductions went into
effect in April 2013 and, due to subsequent legislative amendments to the statute, will remain in effect through 2029 unless additional action is taken by
Congress. In January 2013, the American Taxpayer Relief Act of 2012 was signed into law, which, among other things, further reduced Medicare payments
to several types of providers, including hospitals, imaging centers and cancer treatment centers, and increased the statute of limitations period for the
government to recover overpayments to providers from three to five years. These new laws or any other similar laws introduced in the future may result in
additional reductions in Medicare and other healthcare funding, which could negatively affect our customers and accordingly, our financial operations.

40

 
 
 
 
 
 
 
 
 
 
 
Moreover, payment methodologies may be subject to changes in healthcare legislation and regulatory initiatives. For example, CMS may develop

new payment and delivery models, such as bundled payment models. In addition, recently there has been heightened governmental scrutiny over the
manner in which manufacturers set prices for their marketed products, which has resulted in several U.S. Congressional inquiries and proposed and enacted
federal and state legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under
government payor programs, and review the relationship between pricing and manufacturer patient programs.  The Trump administration’s budget proposal
for fiscal year 2020 contains further drug price control measures that could be enacted during the budget process or in other future legislation, including, for
example, measures to permit Medicare Part D plans to negotiate the price of certain drugs under Medicare Part B, to allow some states to negotiate drug
prices under Medicaid, and to eliminate cost sharing for generic drugs for low-income patients. Further, the Trump administration released a “Blueprint” to
lower drug prices and reduce out of pocket costs of drugs that contains additional proposals to increase manufacturer competition, increase the negotiating
power of certain federal healthcare programs, incentivize manufacturers to lower the list price of their products and reduce the out of pocket costs of drug
products paid by consumers. The U.S. Department of Health and Human Services has solicited feedback on certain of these measures and has implemented
others under its existing authority. For example, in May 2019, CMS issued a final rule to allow Medicare Advantage plans the option to use step therapy for
Part B drugs beginning January 1, 2020. This final rule codified CMS’s policy change that was effective January 1, 2019. Although a number of these and
other measures may require authorization to become effective, Congress and the Trump administration have each indicated that it will continue to seek new
legislative and/or administrative measures to control drug costs. We expect that additional U.S. federal healthcare reform measures will be adopted in the
future, any of which could limit the amounts that the U.S. federal government will pay for healthcare products and services, which could result in reduced
demand for our product candidates or additional pricing pressures.

Individual states in the United States have also increasingly passed legislation and implemented regulations designed to control pharmaceutical and

biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost
disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. Legally mandated
price controls on payment amounts by third-party payors or other restrictions could harm our business, results of operations, financial condition and
prospects. In addition, regional healthcare authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical
products and which suppliers will be included in their prescription drug and other healthcare programs. This could reduce the ultimate demand for our
product candidates or put pressure on our product pricing.

In the European Union, similar political, economic and regulatory developments may affect our ability to profitably commercialize our product

candidates, if approved. In addition to continuing pressure on prices and cost containment measures, legislative developments at the European Union or
member state level may result in significant additional requirements or obstacles that may increase our operating costs. The delivery of healthcare in the
European Union, including the establishment and operation of health services and the pricing and reimbursement of medicines, is almost exclusively a
matter for national, rather than E.U., law and policy. National governments and health service providers have different priorities and approaches to the
delivery of healthcare and the pricing and reimbursement of products in that context. In general, however, the healthcare budgetary constraints in most E.U.
member states have resulted in restrictions on the pricing and reimbursement of medicines by relevant health service providers. Coupled with ever-
increasing European Union and national regulatory burdens on those wishing to develop and market products, this could prevent or delay marketing
approval of our product candidates, restrict or regulate post-approval activities and affect our ability to commercialize our product candidates, if approved.
In markets outside of the United States and European Union, reimbursement and healthcare payment systems vary significantly by country, and many
countries have instituted price ceilings on specific products and therapies.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action in the
United States or any other jurisdiction. If we or any third parties we may engage are slow or unable to adapt to changes in existing requirements or the
adoption of new requirements or policies, or if we or such third parties are not able to maintain regulatory compliance, our product candidates may lose any
regulatory approval that may have been obtained and we may not achieve or sustain profitability.

Even if we are able to commercialize any product candidate, coverage and adequate reimbursement may not be available or such product candidate
may become subject to unfavorable pricing regulations or third-party coverage and reimbursement policies, which would harm our business.

The regulations that govern regulatory approvals, pricing and reimbursement for drugs products vary widely from country to country. Some
countries require approval of the sale price of a drug product before it can be marketed. In many countries, the pricing review period begins after marketing
approval is granted. In some foreign markets, prescription drug product pricing remains subject to continuing governmental control even after initial
approval is granted. As a result, we might obtain regulatory approval for a product in a particular country, but then be subject to price regulations that delay
our commercial launch of the product, possibly for lengthy time periods and negatively impact the revenues we are able to generate from the sale of the
product in that country. Adverse pricing limitations may hinder our ability to recoup our investment in one or more product candidates, even if our product
candidates obtain regulatory approval.

41

 
Our ability to commercialize any products successfully also will depend in part on the extent to which coverage and adequate reimbursement for

these products and related treatments will be available from third party payors, such as government authorities, private health insurers and other
organizations. Even if we succeed in bringing one or more products to the market, these products may not be considered cost-effective, and the amount
reimbursed for any products may be insufficient to allow us to sell our products on a competitive basis. Because our programs are in the early stages of
development, we are unable at this time to determine their cost effectiveness or the likely level or method of coverage and reimbursement. Increasingly, the
third-party payors who reimburse patients or healthcare providers are requiring that drug companies provide them with predetermined discounts from list
prices, and are seeking to reduce the prices charged or the amounts reimbursed for drug products. If the price we are able to charge for any products we
develop, or the coverage and reimbursement provided for such products, is inadequate in light of our development and other costs, our return on investment
could be affected adversely.

There may be significant delays in obtaining reimbursement for newly-approved drug products, and coverage may be more limited than the
purposes for which the drug product is approved by the FDA or similar foreign regulatory authorities. Moreover, eligibility for reimbursement does not
imply that any drugs product will be reimbursed in all cases or at a rate that covers our costs, including research, development, manufacture, sale and
distribution.

Interim reimbursement levels for new drug products, if applicable, may also be insufficient to cover our costs and may not be made permanent.

Reimbursement rates may be based on payments allowed for lower cost drug products that are already reimbursed, may be incorporated into existing
payments for other services and may reflect budgetary constraints or imperfections in Medicare data. Net prices for drug products may be reduced by
mandatory discounts or rebates required by third party payors and by any future relaxation of laws that presently restrict imports of drug products from
countries where they may be sold at lower prices than in the United States. Obtaining coverage and adequate reimbursement for our product candidates
may be particularly difficult because of the higher prices often associated with drugs administered under the supervision of a physician. Similarly, because
our product candidates are physician-administered injectables, separate reimbursement for the product itself may or may not be available. Instead, the
administering physician may or may not be reimbursed for providing the treatment or procedure in which our product is used.

Further, no uniform policy for coverage and reimbursement exists in the United States, and coverage and reimbursement can differ significantly

from payor to payor. Third-party payors often rely upon Medicare coverage policy and payment limitations in setting their own reimbursement rates, but
also have their own methods and approval process apart from Medicare determinations. As a result, the coverage determination process is often a time-
consuming and costly process that will require us to provide scientific and clinical support for the use of our product candidates to each payor separately,
with no assurance that coverage and adequate reimbursement will be applied consistently or obtained in the first instance. Decisions regarding the extent of
coverage and amount of reimbursement to be provided for any product candidates that we develop will be made on a payor-by-payor basis. One payor’s
determination to provide coverage for a drug does not assure that other payors will also provide coverage and adequate reimbursement for the drug.
Additionally, a third-party payor’s decision to provide coverage for a therapy does not imply that an adequate reimbursement rate will be approved.

Additionally, we may develop companion diagnostic tests for use with our product candidates. We, or our collaborators, will be required to obtain
coverage and reimbursement for these tests separate and apart from the coverage and reimbursement we seek for our product candidates, once approved.
While we have not yet developed any companion diagnostic test for our product candidates, if we do, there is significant uncertainty regarding our ability to
obtain coverage and adequate reimbursement for the same reasons applicable to our product candidates.

Our inability to promptly obtain coverage and adequate reimbursement from both third-party payors for the product candidates and companion
diagnostic tests that we develop and for which we obtain regulatory approval could have a material and adverse effect on our business, financial condition,
results of operations and prospects.

We face potential liability related to the privacy of health information we obtain from clinical trials sponsored by us or our collaborators, from
research institutions and our collaborators, and directly from individuals.

Most healthcare providers, including research institutions from which we or our collaborators obtain patient health information, are subject to
privacy and security regulations promulgated under HIPAA, as amended by HITECH. Any person may be prosecuted under HIPAA’s criminal provisions
either directly or under aiding-and-abetting or conspiracy principles. Consequently, depending on the facts and circumstances, we could face substantial
criminal penalties if we knowingly receive individually identifiable health information from a HIPAA-covered healthcare provider or research institution
that has not satisfied HIPAA’s requirements for disclosure of individually identifiable health information. In addition, we may maintain sensitive personally
identifiable information, including health information, that we receive throughout the clinical trial process, in the course of our research collaborations, and
directly from individuals (or their healthcare providers) who enroll in our patient assistance programs. As such, we may be subject to state laws requiring
notification of affected individuals and state regulators in the event of a breach of personal information, which is a broader class of information than the
individually identifiable health information protected by HIPAA.

42

 
Our clinical trial programs and research collaborations outside the U.S. may implicate international data protection laws, including, in Europe, the
EU Data Protection Directive and, beginning on May 25, 2018, the General Data Protection Regulation, or the GDPR, that is replacing it. The GDPR will
implement more stringent operational requirements for processors and controllers of personal data. It also significantly increases penalties for non-
compliance. If our privacy or data security measures fail to comply with the GDPR requirements, we may be subject to litigation, regulatory investigations,
enforcement notices requiring us to change the way we use personal data and/or fines of up to 20.0 million Euros or up to 4% of the total worldwide annual
turnover of the preceding financial year, whichever is higher. In addition to statutory enforcement, a personal data breach can lead to negative publicity and
a potential loss of business.

We are also subject to evolving E.U. laws on data export, as we may transfer personal data from the European Union to other jurisdictions. There is

currently litigation challenging E.U. mechanisms for adequate data transfer. It is uncertain whether these mechanisms will be invalidated by the E.U.
courts. We could be impacted by changes in law as a result of the current challenges to these mechanisms, which may lead to governmental enforcement
actions, litigation, fines and penalties or adverse publicity that could have an adverse effect on our business.

We are likely to be required to expend significant capital and other resources to ensure ongoing compliance with applicable privacy and data
security laws both inside and outside the United States. Claims that we have violated individuals’ privacy rights or breached our contractual obligations,
even if we are not found liable, could be expensive and time-consuming to defend and could result in adverse publicity that could harm our business.

If we or any collaborators fail to comply with applicable federal, state, or local regulatory requirements, we could be subject to a range of regulatory

actions that could affect our or any collaborators’ ability to seek to commercialize our clinical candidates. Any threatened or actual government
enforcement action could also generate adverse publicity and require that we devote substantial resources that could otherwise be used in other aspects of
our business.

Risks Related to Our Business Operations

Manufacturing our TriTAC and ProTriTAC product candidates is complex. We and our third-party manufacturers may encounter difficulties in
production. If we encounter any such difficulties, our ability to supply our product candidates for clinical trials or, if approved, for commercial sale
could be delayed or halted entirely.

The manufacture of biopharmaceutical products is complex and requires significant expertise and capital investment, including the development of

advanced manufacturing techniques and process controls. The process of manufacturing our product candidates is extremely susceptible to product loss due
to contamination, equipment failure or improper installation or operation of equipment, vendor or operator error, inconsistency in yields, variability in
product characteristics and difficulties in scaling the production process. Even minor deviations from normal manufacturing processes could result in
reduced production yields, product defects and other supply disruptions. If microbial, viral or other contaminations are discovered in our product candidates
or in the manufacturing facilities in which our product candidates are made, such manufacturing facilities may need to be closed for an extended period of
time to investigate and remedy the contamination. All of our TriTACs and ProTriTACs are manufactured from a vial of a master cell bank of that
antibody’s production cell line. We have or intend to have one master cell bank for each TriTAC and ProTriTAC that was or will be produced and tested in
accordance with current good manufacturing practice, or cGMP, and applicable regulations. Each master cell bank is or will be stored in two independent
locations, and we intend to produce working cell banks for each product candidate later in product development. It is possible that we could lose multiple
cell banks from multiple locations and have our manufacturing severely impacted by the need to replace the cell banks. However, we believe we have
adequate backup should any particular cell bank be lost in a catastrophic event. Any adverse developments affecting manufacturing operations for our
product candidates, if any are approved, may result in shipment delays, inventory shortages, lot failures, product withdrawals or recalls, or other
interruptions in the supply of our products. We may also have to take inventory write-offs and incur other charges and expenses for products that fail to
meet specifications as a result of defects or storage over an extended period of time, undertake costly remediation efforts or seek more costly manufacturing
alternatives.

Our business could be adversely affected by the effects of health epidemics, including the recent coronavirus disease (COVID-19) outbreak. If
COVID-19 becomes a worldwide pandemic, it could materially affect our operations, including at our headquarters in the San Francisco Bay Area
and at our clinical trial sites.

Our business could be adversely affected by health epidemics in regions where we or third parties on which we rely have manufacturing facilities,

clinical trials sites and other business operations. If the COVID-19 outbreak continues to spread, we may need to limit operations or implement limitations,
including work from home policies. There is a risk that other countries or regions may be less effective at containing COVID-19, or it may be more
difficult to contain if the outbreak reaches a larger population or broader geography, in which case the risks described herein could be elevated significantly.

In addition, our clinical trials may be affected by the COVID-19 outbreak.  Site initiation and patient enrollment at hospitals and medical institutions

may be delayed due to prioritization of healthcare resources, such as physicians and staff, toward the COVID-19 outbreak.  If COVID-19 becomes a
worldwide pandemic, it may delay enrollment in our clinical trials, and some patients may not be able to comply with clinical trial protocols if quarantines
impede patient movement or interrupt healthcare services.  Moreover, limitations on global international travel may interrupt key trial activities, including
necessary interactions with regulators, ethics committees and other important agencies and contractors.  Any of the above could delay our clinical trials or
prevent us from completing our clinical trials at all, and harm our ability to obtain approval for our product candidates.

43

 
The ultimate impact of the COVID-19 outbreak or a similar health epidemic is highly uncertain and subject to change.  We do not yet know the full
extent of potential delays or impacts on our business, our clinical trials, healthcare systems or the global economy as a whole.  However, these effects could
have a material impact on our operations, and we will continue to monitor the COVID-19 situation closely.

Our business may become subject to economic, political, regulatory and other risks associated with international operations.

Our business is subject to risks associated with conducting business internationally. Accordingly, our future results could be harmed by a variety of

factors, including:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

economic weakness, including inflation, or political instability, particularly in foreign economies and markets;

differing regulatory requirements for drug approvals in foreign countries;

differing jurisdictions could present different issues for securing, maintaining and/or obtaining freedom to operate in such jurisdictions;

potentially reduced protection for intellectual property rights;

difficulties in compliance with foreign laws and regulations;

changes in foreign regulations and customs, tariffs and trade barriers;

changes in foreign currency exchange rates and currency controls;

changes in a specific country’s or region’s political or economic environment;

trade protection measures, import or export licensing requirements or other actions by the U.S. or foreign governments;

differing reimbursement regimes and price controls in certain foreign markets;

negative consequences from changes in tax laws;

compliance with tax, employment, immigration and labor laws for employees living or traveling abroad;

workforce uncertainty in countries where labor unrest is more common than in the United States;

difficulties associated with staffing and managing international operations, including differing labor relations;

production shortages resulting from any events affecting raw material supply or manufacturing capabilities abroad;

the impact of public health epidemics, such as the coronavirus disease (COVID-19) currently impacting multiple jurisdictions worldwide,
including the United States; and

business interruptions resulting from geo-political actions, including war and terrorism, or natural disasters, including earthquakes, typhoons,
floods and fires.

We may become exposed to costly and damaging liability claims, either when testing our product candidates in the clinic or at the commercial stage,
and our product liability insurance may not cover all damages from such claims.

We are exposed to potential product liability and professional indemnity risks that are inherent in the research, development, manufacturing,
marketing and use of pharmaceutical products. While we currently have no products that have been approved for commercial sale, the current and future
use of product candidates by us and our partners in clinical trials, and the sale of any approved products in the future, may expose us to liability claims.
These claims might be made by patients that use the product, healthcare providers, pharmaceutical companies, our partners or others selling such products.
Any claims against us, regardless of their merit, could be difficult and costly to defend and could materially adversely affect the market for our product
candidates or any prospects for commercialization of our product candidates.

Although the clinical trial process is designed to identify and assess potential side effects, it is always possible that a drug, even after regulatory

approval, may exhibit unforeseen side effects. If any of our product candidates were to cause adverse side effects during clinical trials or after approval of
the product candidate, we may be exposed to substantial liabilities. Physicians and patients may not comply with any warnings that identify known
potential adverse effects and patients who should not use our product candidates.

Even successful defense against product liability claims would require significant financial and management resources. Regardless of the merits or

eventual outcome, liability claims may result in: decreased demand for our product candidates; injury to our reputation; withdrawal of clinical trial
participants; initiation of investigations by regulators; costs to defend the related litigation; a diversion of management’s time and our resources; substantial
monetary awards to trial participants or patients; product recalls, withdrawals or labeling, marketing or promotional restrictions; loss of revenue; exhaustion
of any available insurance and our capital resources; the inability to commercialize any product candidate; and a decline in our share price.

44

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Although we maintain adequate product liability insurance for our product candidates, it is possible that our liabilities could exceed our insurance
coverage. We intend to expand our insurance coverage to include the sale of commercial products if we obtain marketing approval for any of our product
candidates. However, we may not be able to maintain insurance coverage at a reasonable cost or obtain insurance coverage that will be adequate to satisfy
any liability that may arise. If a successful product liability claim or series of claims is brought against us for uninsured liabilities or in excess of insured
liabilities, our assets may not be sufficient to cover such claims and our business operations could be impaired.

Risks from improper conduct by our employees, agents, contractors or collaborators could adversely affect our reputation, business, prospects,
operating results and financial condition.

We cannot ensure that our compliance controls, policies and procedures will in every instance protect us from acts committed by our employees,

agents, contractors or collaborators that would violate the laws or regulations of the jurisdictions in which we operate, including, without limitation,
employment, foreign corrupt practices, trade restrictions and sanctions, environmental, competition and patient privacy and other privacy laws and
regulations. Such improper actions could subject us to civil or criminal investigations and monetary and injunctive penalties, and could adversely impact
our ability to conduct business, operating results and reputation.

We are subject to a number of anti-corruption laws, including the U.S. Foreign Corrupt Practices Act, or FCPA, and the U.K. Bribery Act. Our

failure to comply with anti-corruption laws applicable to us could result in penalties, which could harm our reputation and harm our business, financial
condition, results of operations, cash flows or prospects. The FCPA generally prohibits companies and their intermediaries from making improper
payments to foreign officials for the purpose of obtaining or keeping business and/or other benefits. The FCPA also requires public companies to maintain
accurate books and records and devise a system of sufficient internal accounting controls. We regularly review and update our policies and procedures and
internal controls designed to provide reasonable assurance that we, our employees, distributors and other intermediaries comply with the anti-corruption
laws to which we are subject. However, there are inherent limitations to the effectiveness of any policies, procedures and internal controls, including the
possibility of human error and the circumvention or overriding of the policies, procedures and internal controls. There can be no assurance that such
policies or procedures or internal controls will work effectively at all times or protect us against liability under these or other laws for actions taken by our
employees, distributors and other intermediaries with respect to our business.

The SEC, and the Department of Justice continue to view FCPA enforcement activities as a high priority. There is no certainty that all of our
employees, agents, contractors or collaborators, or those of our affiliates, will comply with all applicable laws and regulations, particularly given the high
level of complexity of these laws. Violations of these laws and regulations could result in fines, criminal sanctions against us, our officers or our
employees, requirements to obtain export licenses, cessation of business activities in sanctioned countries, implementation of compliance programs and
prohibitions on the conduct of our business. Any such violations could materially damage our reputation, our brand, our international operations, our ability
to attract and retain employees, and our business, prospects, operating results, and financial condition.

Our future growth and ability to compete depends on retaining our key personnel and recruiting additional qualified personnel.

Our success depends upon the continued contributions of our key management, scientific and technical personnel, many of whom have been
instrumental for us and have substantial experience with our therapies and related technologies. The loss of key managers and senior scientists could delay
our research and development activities. In addition, the competition for qualified personnel in the biopharmaceutical and pharmaceutical field is intense,
and our future success depends upon our ability to attract, retain and motivate highly-skilled scientific, technical and managerial employees. We face
competition for personnel from other companies, universities, public and private research institutions and other organizations. If our recruitment and
retention efforts are unsuccessful in the future, it may be difficult for us to implement business strategy, which could have a material adverse effect on our
business.

We conduct substantially all of our operations at our facilities in South San Francisco, California. This region is headquarters to many other
biopharmaceutical companies and many academic and research institutions. Competition for skilled personnel in this region is intense and may limit our
ability to hire and retain highly qualified personnel on acceptable terms or at all.

We expect to expand our development, regulatory and sales and marketing capabilities, and as a result, we may encounter difficulties in managing
our growth, which could disrupt our operations.

As of February 29, 2020, we had 61 full-time employees. We expect to experience significant growth in the number of our employees and the scope

of our operations, particularly in the areas of drug development, regulatory affairs and sales and marketing. To manage our anticipated future growth, we
must continue to implement and improve our managerial, operational and financial systems, expand our facilities and continue to recruit and train
additional qualified personnel. Due to our limited financial resources and the limited experience of our management team in managing a company with
such anticipated growth, we may not be able to effectively manage the expansion of our operations or recruit and train additional qualified personnel. The
expansion of our operations may lead to significant costs and may divert our management and business development resources. Any inability to manage
growth could delay the execution of our business plans or disrupt our operations.

45

 
In addition, future growth imposes significant added responsibilities on members of management, including: identifying, recruiting, integrating,
maintaining and motivating additional employees; managing our internal development efforts effectively, including the clinical and FDA review process for
our product candidates, while complying with our contractual obligations to contractors and other third parties; and improving our operational, financial
and management controls, reporting systems and procedures. Our future financial performance and our ability to commercialize our product candidates will
depend, in part, on our ability to effectively manage our growth, and our management may also have to divert a disproportionate amount of its attention
away from day-to-day activities in order to devote a substantial amount of time to managing these growth activities.

We rely or expect to rely in substantial part on certain independent organizations, advisors and consultants to provide certain services, including

strategic, financial, business development services, as well as substantial aspects of regulatory approval, clinical management, manufacturing and
preparation for potential commercial launch. There can be no assurance that the services of independent organizations, advisors and consultants will
continue to be available to us on a timely basis when needed, or that we can find qualified replacements. In addition, if we are unable to effectively manage
our outsourced activities or if the quality or accuracy of the services provided by consultants or contract manufacturing organizations is compromised for
any reason, our clinical trials may be extended, delayed or terminated, and we may not be able to obtain regulatory approval of our product candidates or
otherwise advance our business. There can be no assurance that we will be able to manage our existing consultants or find other competent outside
contractors and consultants on economically reasonable terms, or at all.

If we are not able to effectively expand our organization by hiring new employees and expanding our groups of consultants and contractors, we may

not be able to successfully implement the tasks necessary to further develop and commercialize our product candidates and, accordingly, may not achieve
our research, development and commercialization goals.

Acquisitions or joint ventures could disrupt our business, cause dilution to our stockholders and otherwise harm our business.

We actively evaluate various strategic transactions on an ongoing basis. We may acquire other businesses, products or technologies as well as pursue

strategic alliances, joint ventures or investments in complementary businesses. Any of these transactions could be material to our financial condition and
operating results and expose us to many risks, including:

•

•

•

•

•

•

•

disruption in our relationships with existing strategic partners or suppliers as a result of such a transaction;

unanticipated liabilities related to acquired companies or joint ventures;

difficulties integrating acquired personnel, technologies and operations into our existing business;

retention of key employees;

diversion of management time and focus from operating our business to management of strategic alliances or joint ventures or acquisition
integration challenges;

increases in our expenses and reductions in our cash available for operations and other uses; and

possible write-offs or impairment charges relating to acquired businesses.

In addition, we face significant competition in seeking appropriate strategic partners and the negotiation process is time-consuming and complex.

Moreover, we may not be successful in our efforts to establish a strategic alliance or other alternative arrangements for our product candidates because they
may be deemed to be at too early of a stage of development for collaborative effort and third parties may not view our product candidates as having the
requisite potential to demonstrate safety and efficacy. Any delays in entering into new strategic transactions related to our product candidates could delay
the development and commercialization of our product candidates in certain geographies for certain indications, which would harm our business prospects,
financial condition and results of operations.

Foreign acquisitions involve unique risks in addition to those mentioned above, including those related to integration of operations across different

cultures and languages, currency risks, potentially adverse tax consequences of overseas operations and the particular economic, political and regulatory
risks associated with specific countries.

The anticipated benefit of any strategic alliance, joint venture or acquisition may not materialize or such strategic alliance, joint venture or
acquisition may be prohibited. Additionally, future acquisitions or dispositions could result in potentially dilutive issuances of our equity securities, the
incurrence of debt, contingent liabilities or amortization expenses or write-offs of goodwill, any of which could harm our financial condition. We cannot
predict the number, timing or size of future joint ventures or acquisitions, or the effect that any such transactions might have on our operating results.

46

 
 
 
 
 
 
 
 
Our research and development activities could be affected or delayed as a result of possible restrictions on animal testing.

Certain laws and regulations require us to test our product candidates on animals before initiating clinical trials involving humans. Animal testing
activities have been the subject of controversy and adverse publicity. Animal rights groups and other organizations and individuals have attempted to stop
animal testing activities by pressing for legislation and regulation in these areas and by disrupting these activities through protests and other means. To the
extent the activities of these groups are successful, our research and development activities may be interrupted, delayed or become more expensive.

Risks Related to Commercialization of Our Product Candidates

We operate in highly competitive and rapidly changing industries, which may result in others discovering, developing or commercializing competing
products before or more successfully than we do.

The biopharmaceutical and pharmaceutical industries are highly competitive and subject to significant and rapid technological change. Our success

is highly dependent on our ability to discover, develop and obtain marketing approval for new and innovative products on a cost-effective basis and to
market them successfully. In doing so, we face and will continue to face intense competition from a variety of businesses, including large pharmaceutical
and biotechnology companies, academic institutions, government agencies and other public and private research organizations. These organizations may
have significantly greater resources than we do and conduct similar research, seek patent protection and establish collaborative arrangements for research,
development, manufacturing and marketing of products that compete with our product candidates. Mergers and acquisitions in the biotechnology and
pharmaceutical industries may result in even more resources being concentrated in our competitors. Competition may increase further as a result of
advances in the commercial applicability of technologies and greater availability of capital for investment in these industries.

With the proliferation of new oncology drugs and therapies, we expect to face increasingly intense competition as new technologies become
available. If we fail to stay at the forefront of technological change, we may be unable to compete effectively. Any product candidates that we successfully
develop and commercialize will compete with existing therapies and new therapies that may become available in the future. The highly competitive nature
of and rapid technological changes in the biotechnology and pharmaceutical industries could render our product candidates or our technology obsolete, less
competitive or uneconomical. Our competitors may, among other things:

•

•

•

•

•

•

have significantly greater financial, manufacturing, marketing, drug development, technical and human resources than we do;

develop and commercialize products that are safer, more effective, less expensive, more convenient or easier to administer, or have fewer or
less severe side effects;

obtain quicker regulatory approval;

establish superior proprietary positions covering our products and technologies;

implement more effective approaches to sales and marketing; or

form more advantageous strategic alliances.

Should any of these factors occur, our business, financial condition and results of operations could be materially adversely affected.

In addition, any collaborators may decide to market and sell products that compete with the product candidates that we have agreed to license to

them, and any competition by our collaborators could also have a material adverse effect on our future business, financial condition and results of
operations.

Smaller and other early stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large

and established companies. These third parties compete with us in recruiting and retaining qualified scientific and management personnel, establishing
clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

47

 
 
 
 
 
 
 
If the market opportunity for any product candidate that we or our strategic partners develop is smaller than we believe, our revenue may be
adversely affected and our business may suffer.

We intend to initially focus our product candidate development on treatments for various oncology indications. Our projections of addressable
patient populations that may benefit from treatment with our product candidates are based on our estimates. These estimates, which have been derived from
a variety of sources, including scientific literature, surveys of clinics, patient foundations and market research, may prove to be incorrect. Further, new
studies may change the estimated incidence or prevalence of these cancers. Additionally, the potentially addressable patient population for our product
candidates may not ultimately be amenable to treatment with our product candidates. Our market opportunity may also be limited by future competitor
treatments that enter the market. If any of our estimates prove to be inaccurate, the market opportunity for any product candidate that we or our strategic
partners develop could be significantly diminished and have an adverse material impact on our business.

The market opportunities for our product candidates may be limited to those patients who are ineligible for or have failed prior treatments and may
be small.

Cancer therapies are sometimes characterized by line of therapy (first, second, third, fourth, etc.), and the FDA often initially approves new
therapies only for use in a particular line or lines of therapy. When cancer is detected early enough, first line therapy is sometimes adequate to provide a
cure or prolong life without a cure. Whenever first line therapy (typically chemotherapy, hormone therapy, surgery or a combination of these) proves
unsuccessful, second line therapy (typically more chemotherapy, radiation, antibody drugs, tumor targeted small molecules or a combination of these) may
be administered. Third or fourth line therapies can include antibody and small molecule targeted therapies, more invasive forms of surgery and new
technologies. We may initially seek approval of our product candidates as a third line therapy for patients who have failed other approved treatments.
Subsequently, for product candidates that prove to be sufficiently beneficial, if any, we would expect to seek approval as a second and first line therapy.
However, there is no guarantee that our product candidates, even if initially approved, would be subsequently approved as a second or first line therapy. In
addition, we may have to conduct additional clinical trials prior to gaining approval as a second or first line therapy. Because the potentially addressable
patient target population for our product candidates may be limited to patients who are ineligible for or have failed prior treatments, even if we obtain
significant market share for our product candidates, we may never achieve profitability.

We may expend our limited resources to pursue a particular product candidate or indication and fail to capitalize on product candidates or
indications that may be more profitable or for which there is a greater likelihood of success.

Because we have limited financial and managerial resources, we focus on research programs, therapeutic platforms and product candidates that we
identify for specific indications. As a result, we may forego or delay pursuit of opportunities with other therapeutic platforms or product candidates or for
other indications that later prove to have greater commercial potential. Our resource allocation decisions may cause us to fail to capitalize on viable
commercial products or profitable market opportunities. Our spending on current and future research and development programs, therapeutic platforms and
product candidates for specific indications may not yield any commercially viable products. If we do not accurately evaluate the commercial potential or
target market for a particular product candidate, we may relinquish valuable rights to that product candidate through collaboration, licensing or other
royalty arrangements in cases in which it would have been more advantageous for us to retain sole development and commercialization rights.

Even if approved, our products may not gain market acceptance, in which case we may not be able to generate product revenues, which will
materially adversely affect our business, financial condition and results of operations.

Even if the FDA or any other regulatory authority approves the marketing of any product candidates that we develop on our own or with a

collaborator, physicians, healthcare providers, patients or the medical community may not accept or use them. If these products do not achieve an adequate
level of acceptance, we may not generate significant product revenues or any profits from operations. The degree of market acceptance of any of our
product candidates will depend on a variety of factors, including:

•

•

•

•

•

•

•

the timing of market introduction;

the number and clinical profile of competing products;

our ability to provide acceptable evidence of safety and efficacy;

the prevalence and severity of any side effects;

relative convenience and ease of administration;

cost-effectiveness;

patient diagnostics and screening infrastructure in each market;

48

 
 
 
 
 
 
 
 
•

•

•

marketing and distribution support;

availability of coverage, adequate reimbursement and sufficient payment from health maintenance organizations and other insurers, both
public and private, for our product candidates, or the procedures utilizing our product candidates, if approved; and

other potential advantages over alternative treatment methods.

If our product candidates fail to gain market acceptance, this will have a material adverse impact on our ability to generate revenues to provide a

satisfactory, or any, return on our investments. Even if some products achieve market acceptance, the market may prove not to be large enough to allow us
to generate significant revenues.

We currently have no marketing, sales or distribution infrastructure. If we are unable to develop sales, marketing and distribution capabilities on
our own or through collaborations, or if we fail to achieve adequate pricing and/or reimbursement we will not be successful in commercializing our
product candidates.

We currently have no marketing, sales and distribution capabilities because all of our product candidates are still in clinical or preclinical
development. If any of our product candidates are approved, we intend either to establish a sales and marketing organization with technical expertise and
supporting distribution capabilities to commercialize our product candidates, or to outsource this function to a third party. Either of these options would be
expensive and time consuming. These costs may be incurred in advance of any approval of our product candidates. In addition, we may not be able to hire a
sales force that is sufficient in size or has adequate expertise in the medical markets that we intend to target. Any failure or delay in the development of our
internal sales, marketing and distribution capabilities would adversely impact the commercialization of our products, if approved.

To the extent that we enter into collaboration agreements with respect to marketing, sales or distribution, our product revenue may be lower than if

we directly marketed or sold any approved products. In addition, any revenue we receive will depend in whole or in part upon the efforts of these third-
party collaborators, which may not be successful and are generally not within our control. If we are unable to enter into these arrangements on acceptable
terms or at all, we may not be able to successfully commercialize any approved products. If we are not successful in commercializing any approved
products, either on our own or through collaborations with one or more third parties, our future product revenue will suffer and we may incur significant
additional losses.

We have never commercialized a product candidate before and may lack the necessary expertise, personnel and resources to successfully
commercialize any products on our own or together with suitable collaborators.

We have never commercialized a product candidate, and we currently have no sales force, marketing or distribution capabilities. To achieve

commercial success for the product candidates, which we may license to others, we will rely on the assistance and guidance of those collaborators. For
product candidates for which we retain commercialization rights, we will have to develop our own sales, marketing and supply organization or outsource
these activities to a third party.

Factors that may affect our ability to commercialize our product candidates on our own include recruiting and retaining adequate numbers of
effective sales and marketing personnel, obtaining access to or persuading adequate numbers of physicians to prescribe our product candidates and other
unforeseen costs associated with creating an independent sales and marketing organization. Developing a sales and marketing organization will be
expensive and time-consuming and could delay the launch of our product candidates. We may not be able to build an effective sales and marketing
organization. If we are unable to build our own distribution and marketing capabilities or to find suitable partners for the commercialization of our product
candidates, we may not generate revenues from them or be able to reach or sustain profitability.

Our product candidates for which we intend to seek approval as biologic products may face competition sooner than anticipated.

The ACA includes a subtitle called the Biologics Price Competition and Innovation Act of 2009, or BPCIA, which created an abbreviated approval

pathway for biological products that are biosimilar to or interchangeable with an FDA-licensed reference biological product. Under the BPCIA, an
application for a biosimilar product may not be submitted to the FDA until four years following the date that the reference product was first approved by
the FDA. In addition, the approval of a biosimilar product may not be made effective by the FDA until 12 years from the date on which the reference
product was first approved. During this 12-year period of exclusivity, another company may still market a competing version of the reference product if the
FDA approves a full BLA for the competing product containing the sponsor’s own preclinical data and data from adequate and well-controlled clinical
trials to demonstrate the safety, purity and potency of their product. The law is complex and is still being interpreted and implemented by the FDA. As a
result, its ultimate impact, implementation, and meaning are subject to uncertainty.

49

 
 
 
 
We believe that any of our product candidates approved as a biological product under a BLA should qualify for the 12-year period of exclusivity.
However, there is a risk that this exclusivity could be shortened due to congressional action or otherwise, or that the FDA will not consider our product
candidates to be reference products for competing products, potentially creating the opportunity for competition sooner than anticipated. Other aspects of
the BPCIA, some of which may impact the BPCIA exclusivity provisions, have also been the subject of recent litigation. Moreover, the extent to which a
biosimilar, once approved, will be substituted for any one of our reference products in a way that is similar to traditional generic substitution for non-
biological products is not yet clear, and will depend on a number of marketplace and regulatory factors that are still developing.

Jurisdictions in addition to the United States have established abbreviated pathways for regulatory approval of biological products that are biosimilar

to earlier approved reference products. For example, the European Union has had an established regulatory pathway for biosimilars since 2005.

The increased likelihood of biosimilar competition has increased the risk of loss of innovators’ market exclusivity. Due to this risk, and uncertainties

regarding patent protection, if our clinical candidates are approved for marketing, it is not possible to predict the length of market exclusivity for any
particular product with certainty based solely on the expiration of the relevant patent(s) or the current forms of regulatory exclusivity. It is also not possible
to predict changes in United States regulatory law that might reduce biological product regulatory exclusivity. The loss of market exclusivity for a product
would likely materially and negatively affect revenues and we may not generate adequate or sufficient revenues from them or be able to reach or sustain
profitability.

Risks Related to Our Dependence on Third Parties

We rely, and expect to continue to rely, on third parties, including independent clinical investigators and CROs, to conduct our preclinical studies
and clinical trials. If these third parties do not successfully carry out their contractual duties, comply with applicable regulatory requirements or
meet expected deadlines, we may not be able to obtain regulatory approval for or commercialize our product candidates and our business could be
substantially harmed.

We have relied upon and plan to continue to rely upon third parties, including independent clinical investigators and third-party CROs, to conduct

our preclinical studies and clinical trials and to monitor and manage data for our ongoing preclinical and clinical programs. We rely on these parties for
execution of our preclinical studies and clinical trials, and control only certain aspects of their activities. Nevertheless, we are responsible for ensuring that
each of our studies and trials is conducted in accordance with the applicable protocol, legal, regulatory and scientific standards, and our reliance on these
third parties does not relieve us of our regulatory responsibilities. We and our third-party contractors and CROs are required to comply with GCP
requirements, which are regulations and guidelines enforced by the FDA and comparable foreign regulatory authorities for all of our products candidates in
clinical development. Regulatory authorities enforce these GCPs through periodic inspections of trial sponsors, principal investigators and trial sites. If we
or any of our CROs fail to comply with applicable GCPs, the clinical data generated in our clinical trials may be deemed unreliable and the FDA or
comparable foreign regulatory authorities may require us to perform additional clinical trials before approving our marketing applications. We cannot
assure you that upon inspection by a given regulatory authority, such regulatory authority will determine that any of our clinical trials comply with GCP
regulations. In addition, our clinical trials must be conducted with product produced under cGMP regulations. Our failure to comply with these regulations
may require us to repeat clinical trials, which would delay the regulatory approval process.

Further, these investigators and CROs are not our employees and we will not be able to control, other than by contract, the amount of resources,

including time, which they devote to our product candidates and clinical trials. If independent investigators or CROs fail to devote sufficient resources to
the development of our product candidates, or if their performance is substandard, it may delay or compromise the prospects for approval and
commercialization of any product candidates that we develop. In addition, the use of third-party service providers may require us to disclose our proprietary
information to these parties, which could increase the risk that this information will be misappropriated.

Our CROs have the right to terminate their agreements with us in the event of an uncured material breach. In addition, some of our CROs have an

ability to terminate their respective agreements with us if it can be reasonably demonstrated that the safety of the subjects participating in our clinical trials
warrants such termination, if we make a general assignment for the benefit of our creditors or if we are liquidated.

If any of our relationships with these third-party CROs terminate, we may not be able to enter into arrangements with alternative CROs or to do so
on commercially reasonable terms. If CROs do not successfully carry out their contractual duties or obligations or meet expected deadlines, if they need to
be replaced or if the quality or accuracy of the clinical data they obtain is compromised due to the failure to adhere to our clinical protocols, regulatory
requirements or for other reasons, our clinical trials may be extended, delayed or terminated and we may not be able to obtain regulatory approval for or
successfully commercialize our product candidates. As a result, our results of operations and the commercial prospects for our product candidates would be
harmed, our costs could increase and our ability to generate revenues could be delayed.

50

 
Switching or adding additional CROs involves additional cost and requires management time and focus. In addition, there is a natural transition
period when a new CRO commences work. As a result, delays occur, which can materially impact our ability to meet our desired clinical development
timelines. Additionally, CROs may lack the capacity to absorb higher workloads or take on additional capacity to support our needs. Though we carefully
manage our relationships with our CROs, there can be no assurance that we will not encounter similar challenges or delays in the future or that these delays
or challenges will not have a material adverse impact on our business, financial condition and prospects.

We may not realize the benefits of any collaborative or licensing arrangement we enter into, and if we fail to enter into new strategic relationships
our business, financial condition, commercialization prospects and results of operations may be materially adversely affected.

Our product development programs and the potential commercialization of our product candidates will require substantial additional cash to fund

expenses. Therefore, for some of our product candidates, we may decide to enter into new collaborations with pharmaceutical or biopharmaceutical
companies for the development and potential commercialization of those product candidates. For instance, we have a discovery collaboration and license
agreement with AbbVie, pursuant to which we have licensed the development and commercialization of certain of our product candidates, as well as
Development and Option Agreement with AbbVie, pursuant to which we granted to AbbVie an option to a worldwide, exclusive license with respect to
HPN217.

We face significant competition in seeking appropriate collaborators. Collaborations are complex and time-consuming to negotiate and document.

We may also be restricted under existing and future collaboration agreements from entering into agreements on certain terms with other potential
collaborators. We may not be able to negotiate collaborations on acceptable terms, or at all. If our strategic collaborations do not result in the successful
development and commercialization of product candidates, or if one of our collaborators terminates its agreement with us, we may not receive any future
research funding or milestone or royalty payments under the collaboration. Moreover, our estimates of the potential revenue we are eligible to receive
under our strategic collaborations may include potential payments related to therapeutic programs for which our collaborators have discontinued
development or may discontinue development in the future. If that were to occur, we may have to curtail the development of a particular product candidate,
reduce or delay its development program or one or more of our other development programs, delay its potential commercialization or reduce the scope of
our sales or marketing activities, or increase our expenditures and undertake development or commercialization activities at our own expense. If we elect to
increase our expenditures to fund development or commercialization activities on our own, we may need to obtain additional capital, which may not be
available to us on acceptable terms or at all. If we do not have sufficient funds, we will not be able to bring our product candidates to market and generate
product revenue. If we do enter into a new collaboration agreement, we could be subject to the following risks, each of which may materially harm our
business, commercialization prospects and financial condition:

•

•

•

•

•

we may not be able to control the amount and timing of resources that the collaboration partner devotes to the product development program;

the collaboration partner may experience financial difficulties;

we may be required to relinquish important rights such as marketing, distribution and intellectual property rights;

a collaborator could move forward with a competing product developed either independently or in collaboration with third parties, including
our competitors; or

business combinations or significant changes in a collaborator’s business strategy may adversely affect our willingness to complete our
obligations under any arrangement.

If we license products or businesses, we may not be able to realize the benefit of such transactions if we are unable to successfully integrate them

with our existing operations and company culture. We cannot be certain that, following a strategic transaction or license, we will achieve the results,
revenue or specific net income that justifies such transaction.

We rely on third-party manufacturers to produce our product candidates. Any failure by a third-party manufacturer to produce acceptable product
candidates for us may delay or impair our ability to initiate or complete our clinical trials or commercialize approved products.

We do not currently own or operate any manufacturing facilities nor do we have any in-house manufacturing experience or personnel. We work with

third-party contract manufacturers to produce sufficient quantities of our product candidates for preclinical testing and clinical trials, in compliance with
applicable regulatory and quality standards, and intend to do so for the commercial manufacture of our products, if approved. If we are unable to arrange
for such third-party manufacturing sources, or fail to do so on commercially reasonable terms, we may not be able to successfully produce sufficient supply
of product candidate or we may be delayed in doing so. For example, public health epidemics, such as the coronavirus disease (COVID-19) currently
impacting multiple jurisdictions worldwide, including the United States, may impact the ability of our existing or future manufacturers to perform their
obligations under our manufacturing agreements with such parties. Such failure or substantial delay could materially harm our business.

51

 
 
 
 
 
 
Our TriTAC and ProTriTAC platforms rely on third parties for the biological materials used in testing and qualifying our products. Some biological

materials have not always met our expectations or requirements, and any disruption in the supply of these biological materials could materially adversely
affect our business. Although we have control processes and screening procedures, biological materials are susceptible to damage and contamination and
may contain active pathogens. Improper storage of these materials, by us or any third-party suppliers, may require us to destroy some of our biological raw
materials or product candidates.

Reliance on third-party manufacturers entails risks to which we would not be subject if we manufactured product candidates ourselves, including

reliance on the third party for regulatory compliance and quality control and quality assurance, volume and timing of production, the possibility of breach
of the manufacturing agreement by the third party because of factors beyond our control (including a failure to synthesize and manufacture our product
candidates in accordance with our product specifications) and the possibility of termination or nonrenewal of the agreement by the third party at a time that
is costly or damaging to us. In addition, the FDA and other regulatory authorities require that our product candidates be manufactured according to cGMPs.
Pharmaceutical manufacturers and their subcontractors are required to register their facilities or products manufactured at the time of submission of the
marketing application and then annually thereafter with the FDA and certain state and foreign agencies. They are also subject to periodic unannounced
inspections by the FDA, state and other foreign authorities. Any subsequent discovery of problems with a product, or a manufacturing or laboratory facility
used by us or our third-party suppliers, may result in restrictions on the product or on the manufacturing or laboratory facility, including marketed product
recall, suspension of manufacturing, product seizure, or a voluntary withdrawal of the drug from the market. We may have little to no control regarding the
occurrence of third-party manufacturer incidents. Any failure by our third-party manufacturers to comply with cGMP or failure to scale up manufacturing
processes, including any failure to deliver sufficient quantities of product candidates in a timely manner, could lead to an irreparable delay in our
development or commercialization timeline.

To date, we have relied on one single-source supplier for bulk drug substance. The loss of this supplier or its failure to supply us with BDS on a
timely basis could cause a delay in our ability to develop our product candidates and adversely affect our business.

We depend on one single-source supplier for bulk drug substance, or BDS. Although we believe that we have a substantial reserve of BDS to

support our current clinical trial programs, there can be no assurance that our supply of BDS will not be limited, interrupted, or of satisfactory quality or
continue to be available at acceptable prices. Additionally, we do not have any control over the process or timing of the acquisition or manufacture of
materials by our supplier, and cannot ensure that it will deliver to us the BDS we order on time, or at all. The loss of BDS provided by this supplier could
require us to change the design of our product candidate development process based on the functions, limitations, features and specifications of the
replacement.

In addition, the lead time needed to establish a relationship with a new supplier can be lengthy, and we may experience delays in meeting demand in
the event we must switch to a new supplier. The time and effort to qualify a new supplier could result in additional costs, diversion of resources or reduced
manufacturing yields, any of which would negatively impact our operating results. Our reliance on this single-source supplier exposes us to certain risks,
including the following:

•

•

•

•

•

our supplier may cease or reduce production or deliveries, raise prices or renegotiate terms;

we may be unable to locate a suitable replacement on acceptable terms or on a timely basis, if at all;

if there is a disruption to our single-source supplier’s operations, and if we are unable to enter into arrangements with alternative suppliers,
we may need to halt our clinical trial programs;

delays caused by supply issues may harm our reputation, frustrate our clinical trial sites and cause them to turn to our competitors for future
projects; and

our ability to develop our product candidates could be materially and adversely impacted if the single-source supplier upon which we rely
were to experience a significant business challenge, disruption or failure due to issues such as financial difficulties or bankruptcy, issues
relating to other customers such as regulatory or quality compliance issues, or other financial, legal, regulatory or reputational issues.

Moreover, to meet anticipated demand, our single-source supplier may need to increase manufacturing capacity, which could involve significant

challenges. This may require us and our supplier to invest substantial additional funds and hire and retain the technical personnel who have the necessary
experience. Neither we nor our supplier may successfully complete any required increase to existing manufacturing capacity in a timely manner, or at all.

52

 
 
 
 
 
 
We currently rely on third-party suppliers and other third parties for production of our product candidates and our dependence on these third
parties may impair the advancement of our research and development programs and the development of our product candidates. Moreover, we
intend to rely on third parties to produce commercial supplies of any approved product candidate and our commercialization of any of our product
candidates could be stopped, delayed or made less profitable if those third parties fail to obtain approval of the FDA or comparable regulatory
authorities, fail to provide us with sufficient quantities of product or fail to do so at acceptable quality levels or prices or fail to otherwise complete
their duties in compliance with their obligations to us or other parties.

We do not currently own or operate any manufacturing facilities, nor do we have any in-house manufacturing experience or personnel. We rely on

and expect to continue to rely on third-party contract manufacturing organizations, or CMOs, for the supply of current good manufacturing practice-grade,
or cGMP-grade, clinical trial materials and commercial quantities of our product candidates and products, if approved. Reliance on third-party providers
may expose us to more risk than if we were to manufacture product candidates ourselves. The facilities used by our contract manufacturers to manufacture
our commercial products must be approved by the FDA or other global regulatory authorities pursuant to inspections that will be conducted after we submit
our marketing authorization application or BLA to the relevant agency. We have limited control over the manufacturing process of, and beyond contractual
terms, we are completely dependent on our contract manufacturing partners for compliance with cGMP for the manufacture of our product candidates. If
our contract manufacturers cannot successfully manufacture material that conforms to our specifications and the strict regulatory requirements of global
regulatory authorities they will not be able to secure and/or maintain regulatory approval for their manufacturing facilities. In addition, we have limited
control over the ability of our contract manufacturers to maintain adequate quality control, quality assurance and qualified personnel. If the FDA or a
comparable foreign regulatory authority does not approve these facilities for the manufacture of our product candidates or if it withdraws any such approval
in the future, we may need to find alternative manufacturing facilities, which would significantly impact our ability to develop, obtain regulatory approval
for or market our product candidates, if approved. In addition, any failure to achieve and maintain compliance with these laws, regulations and standards
could subject us to the risk that we may have to delay the manufacturing of our product candidates or approved products, which would adversely affect our
business and reputation. Furthermore, third-party providers may breach existing agreements they have with us because of factors beyond our control. They
may also terminate or refuse to renew their agreement because of their own financial difficulties or business priorities, at a time that is costly or otherwise
inconvenient for us. If we were unable to find an adequate replacement or another acceptable service provider in time, our clinical trials could be delayed or
our commercial activities could be harmed. In addition, the fact that we are dependent on our collaborators, our suppliers and other third parties for the
manufacture, filling, storage and distribution of our product candidates means that we are subject to the risk that the products may have manufacturing
defects that would prevent the sale of these products to global markets. The inability to sell our products containing such defects could adversely affect our
business, financial condition and results of operations.

Growth in the costs and expenses of components or raw materials may also adversely influence our business, financial condition and results of
operations. Supply sources could be interrupted from time to time and, if interrupted, there is no guarantee that supplies could be resumed (whether in part
or in whole) within a reasonable timeframe and at an acceptable cost or at all.

We rely on our manufacturers and other subcontractors to comply with and respect the proprietary rights of others in conducting their contractual

obligations for us. If our manufacturers or other subcontractors fail to acquire the proper licenses or otherwise infringe third-party proprietary rights in the
course of completing their contractual obligations to us, we may have to find alternative manufacturers or defend against claims of infringement, either of
which would significantly impact our ability to develop, obtain regulatory approval for or market our product candidates, if approved. In addition, although
we require manufacturers and service providers to assign or license to us their interest in and to intellectual property rights to improvements made by them
in the development and manufacturing process for our products, in future contracts that we may enter into with these third parties, we may not own, or may
have to share, these intellectual property rights to improvements.

53

 
We depend on third-party suppliers for key raw materials used in our manufacturing processes, and the loss of these third-party suppliers or
their inability to supply us with adequate raw materials could harm our business.

We rely on our manufacturers to purchase the raw materials necessary to produce our product candidates for our clinical trials. There are a limited

number of suppliers for raw materials that we use to manufacture our drugs and our manufacturers may qualify second-source suppliers of critical raw
materials to prevent a possible disruption of the supply of the materials necessary to produce our product candidates for our clinical trials, and if approved,
ultimately for commercial sale. We do not have any control over the process or timing of the acquisition of these raw materials by our manufacturers.  We
cannot be sure that the third-party raw material suppliers will remain in business, or that they will not be purchased by a company that is not interested in
continuing to produce these materials. In addition, the lead time needed to qualify a new raw material supplier can be lengthy, and we may experience
delays in meeting demand for our product in the event a new supplier must be used. The time and effort to qualify a new raw material supplier could result
in additional costs, diversion of resources or inability to produce a comparable product candidate, any of which would negatively impact our operating
results. Any significant delay in the supply of a product candidate for an ongoing clinical trial due to the need to replace a third-party raw material
manufacturer could considerably delay completion of our clinical trials, product testing and potential regulatory approval of our product candidates. If our
manufacturers or we are unable to purchase these raw materials after regulatory approval has been obtained for our product candidates, the commercial
launch of our product candidates would be delayed or there would be a shortage in supply, which would impair our ability to generate revenues from the
sale of our product candidates.

Risks Related to Intellectual Property and Information Technology

We rely on patents and other intellectual property rights to protect our technology, including product candidates and our TriTAC and ProTriTAC
platforms, the enforcement, defense and maintenance of which may be challenging and costly. Failure to enforce or protect these rights adequately
could harm our ability to compete and impair our business.

Our commercial success depends in part on obtaining and maintaining patents and other forms of intellectual property rights for technology related

to our TriTAC and ProTriTAC platforms, including, but not limited to, our product candidates, methods used to manufacture those product candidates,
formulations thereof and the methods for treating patients using those product candidates. Given that the development of our technology and product
candidates is at an early stage, our intellectual property portfolio with respect to certain aspects of our technology and product candidates is also at an early
stage. Failure to protect or to obtain, maintain or extend adequate patent and other intellectual property rights could materially adversely affect our ability
to develop and market our product candidates.

We seek to protect our proprietary position by filing patent applications in the United States and abroad related to our novel platform technologies

and product candidates that are important to our business. The patent prosecution process is expensive and time-consuming, and we may not be able to
prepare, file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. It is also possible that we will fail to
identify patentable aspects of inventions made in the course of development and commercialization activities before it is too late to obtain patent protection
on them. Further, the issuance, scope, validity, enforceability and commercial value of our current or future patent rights are highly uncertain. Our pending
and future patent applications may not result in patents being issued which protect our technology or product candidates, in whole or in part, or which
effectively prevent others from commercializing competitive technologies and product candidates. The patent examination process may require us to
narrow the scope of the claims of our pending and future patent applications, which may limit the scope of patent protection that may be obtained. We
cannot assure you that all of the potentially relevant prior art relating to our patents and patent applications has been found. If such prior art exists, it can
invalidate a patent or prevent a patent from issuing from a pending patent application. Even if patents do successfully issue and even if such patents cover
our product candidates, third parties may initiate opposition, interference, re-examination, post-grant review, inter partes review, nullification or derivation
action in court or before patent offices, or similar proceedings challenging the validity, enforceability or scope of such patents, which may result in the
patent claims being narrowed or invalidated. Our patent applications cannot be enforced against third parties practicing the technology claimed in such
applications unless and until a patent issues from such applications, and then only to the extent the issued claims cover the technology.

Because patent applications in the United States and other jurisdictions are confidential for a period of time after filing, and some remain so until
issued, we cannot be certain that we were the first to file any patent application related to our technology, including a particular product candidate. As a
result, the issuance, scope, validity, enforceability and commercial value of our patent rights are highly uncertain.

Furthermore, if third parties have filed such patent applications on or before March 15, 2013, an interference proceeding can be initiated by such
third parties to determine who was the first to invent any of the subject matter covered by the patent claims of our applications. If third parties have filed
such applications after March 15, 2013, a derivation proceeding can be initiated by such third parties to determine whether our invention was derived from
theirs. Even where we have a valid and enforceable patent, we may not be able to exclude others from practicing our invention where the other party can
show that they used the invention in commerce before our filing date or the other party benefits from a compulsory license.

54

 
We may become involved in lawsuits to protect or enforce our issued patents relating to one or more of our product candidates or our TriTAC and
ProTriTAC platforms, which could ultimately render our patents invalid or unenforceable and adversely affect our competitive position.

Competitors may infringe our patents or other intellectual property that relate to our TriTAC and ProTriTAC platforms and product candidates, their

respective methods of use, manufacture and formulations thereof. To protect our competitive position and counter infringement or unauthorized use, we
may from time to time need to resort to litigation to enforce or defend any patents or other intellectual property rights owned by us by filing infringement
claims. As enforcement of intellectual property rights is difficult, unpredictable and expensive, we may fail in enforcing our rights—in which case our
competitors may be permitted to use our technology without being required to pay us any license fees. In addition, litigation involving our patents carries
the risk that one or more of our patents will be held invalid (in whole or in part, on a claim-by-claim basis) or held unenforceable. Such an adverse court
ruling could allow third parties to commercialize our product candidates or methods, or our TriTAC and ProTriTAC platforms, and then compete directly
with us, without payment to us.

If we were to initiate legal proceedings against a third party to enforce a patent covering one of our product candidates or methods, the defendant
could counterclaim that our patent is invalid and/or unenforceable. In patent litigation in the United States or in certain jurisdictions in Europe, defendant
counterclaims alleging invalidity and/or unenforceability are commonplace. Grounds for a validity challenge could be an alleged failure to meet any of
several statutory requirements, for example, lack of novelty, obviousness or non-enablement. Grounds for an unenforceability assertion could be an
allegation that someone connected with prosecution of the patent withheld relevant information from the U.S. Patent and Trademark Office, or made a
misleading statement, during prosecution. Third parties may also raise similar invalidity and/or unenforceability claims before administrative bodies in the
United States or abroad, even outside the context of litigation. Such mechanisms include inter partes review, ex parte re-examination and post grant review
in the United States, and equivalent proceedings in foreign jurisdictions (e.g., opposition proceedings). The outcome following legal assertions of invalidity
and unenforceability during patent litigation is unpredictable. With respect to the validity question, for example, we cannot be certain that there is no
invalidating prior art, of which we and the patent examiner were unaware during prosecution. If a defendant were to prevail on a legal assertion of
invalidity and/or unenforceability, we would lose at least part, and perhaps all, of the patent protection on one or more of our technologies, product
candidates, methods or certain aspects of our TriTAC and ProTriTAC platforms. Such a loss of patent protection could have a material adverse impact on
our business.

There is also a risk that, even if the validity of our patents is upheld, the court will construe our patent’s claims narrowly or decide that we do not

have the right to stop the other party from using the invention at issue on the grounds that our patent claims do not cover the invention. Even if we establish
infringement, the court may decide not to grant an injunction against further infringing activity and instead award only monetary damages, which may or
may not be an adequate remedy. Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation,
there is a risk that some of our confidential information could be compromised by disclosure during litigation. Patents and other intellectual property rights
also will not protect our technology if competitors design around our protected technology without infringing our patents or other intellectual property
rights.

Because of the expense and uncertainty of litigation, we may not be in a position to enforce our intellectual property rights against third parties.

Instead, we may conclude that even if a third party is infringing our issued patent relating to our TriTAC and ProTriTAC platforms and/or product
candidates, any patents that may be issued as a result of our pending or future patent applications or other intellectual property rights, the risk-adjusted cost
of bringing and enforcing such a claim or action may be too high or not in the best interest of us or our stockholders. In such cases, we may decide that the
more prudent course of action is to simply monitor the situation or initiate or seek some other non-litigious action or solution.

We may fail to identify relevant third-party patents or may incorrectly interpret the relevance, scope or expiration of a third-party patent which
might adversely affect our ability to develop our TriTAC and ProTriTAC platforms and product candidates.

We cannot guarantee that our operations and activities do not, or will not in the future, infringe existing or future patents. We also cannot guarantee
that any of our patent searches or analyses, including the identification of relevant patents, the scope of patent claims or the expiration of relevant patents,
are complete or thorough, nor can we be certain that we have identified each and every third-party patent and pending application in the United States and
abroad that is relevant to our TriTAC and ProTriTAC platforms or necessary for the commercialization of our product candidates in any jurisdiction.

55

 
Numerous U.S. and foreign patents and pending patent applications exist in our market that are owned by third parties. Our competitors in both the

United States and abroad, many of which have substantially greater resources and have made substantial investments in patent portfolios and competing
technologies, may have applied for or obtained or may in the future apply for and obtain, patents that will prevent, limit or otherwise interfere with our
ability to make, use and sell our product candidates. We do not always conduct independent reviews of pending patent applications of and patents issued to
third parties. Patent applications in the United States and elsewhere are typically published approximately 18 months after the earliest filing for which
priority is claimed, with such earliest filing date being commonly referred to as the priority date. Certain U.S. applications that will not be filed outside the
United States can remain confidential until patents are issued. In addition, patent applications in the United States and elsewhere can be pending for many
years before issuance, and unintentionally abandoned patents or applications can be revived. Furthermore, pending patent applications that have been
published can, subject to certain limitations, be later amended in a manner that could cover our technologies, our product candidates or the use thereof. As
such, there may be applications of third parties now pending or recently revived patents of which we are unaware. These applications may later result in
issued patents, or the revival of previously abandoned patents, that will prevent, limit or otherwise interfere with our ability to make, use or sell our product
candidates.

The scope of a patent claim is determined by an interpretation of law, the written disclosure in a patent and the patent’s prosecution history. Our

interpretation of the relevance or the scope of a patent or a pending application may be incorrect, which may negatively impact our ability to market our
product candidates. We may incorrectly determine that our product candidates are not covered by a third-party patent or may incorrectly predict whether a
third party’s pending application will issue with claims of relevant scope. Our determination of the expiration date of any patent in the United States or
abroad that we consider relevant may be incorrect, which may negatively impact our ability to develop and market our product candidates. Our failure to
identify and correctly interpret relevant patents may negatively impact our ability to develop and market our product candidates.

We cannot provide any assurances that third-party patents do not exist which might be enforced against our current technology, including our

platform technologies, product candidates and their respective methods of use, manufacture and formulations thereof, and could result in either an
injunction prohibiting our manufacture or future sales, or, with respect to our future sales, an obligation on our part to pay royalties and/or other forms of
compensation to third parties, which could be significant.

Intellectual property rights of third parties could adversely affect our ability to develop or commercialize our product candidates, such that we could
be required to litigate or obtain licenses from third parties in order to develop or market our product candidates. Such litigation or licenses could be
costly or not available on commercially reasonable terms.

Our commercial success depends, in part, on our ability to develop, manufacture, market and sell our product candidates without infringing the

intellectual property and other proprietary rights of third parties. Our competitive position may suffer if patents issued to third parties or other third-party
intellectual property rights cover our methods or product candidates or elements thereof, our manufacture or uses relevant to our development plans, our
product candidates, or other attributes of our product candidates or our TriTAC and ProTriTAC platforms. In such cases, we may not be in a position to
develop or commercialize product candidates unless we successfully pursue litigation to nullify or invalidate the third-party intellectual property right
concerned, which can be expensive and time consuming, or enter into a license agreement with the intellectual property right holder, if available on
commercially reasonable terms.

There is a substantial amount of intellectual property litigation in the biotechnology and pharmaceutical industries, and we may become party to, or

threatened with, litigation or other adversarial proceedings regarding intellectual property rights with respect to our product candidates. For example, on
November 25, 2018, we received a letter from counsel for Maverick alleging that our ProTriTAC program is subject to the non-compete provision of our
Asset Transfer Agreement with Maverick. On January 3, 2019, Maverick filed a complaint against us in the Delaware Court of Chancery and a motion for a
temporary restraining order seeking to prohibit us from further developing our ProTriTAC platform. The complaint alleges claims for breach of contract
and misappropriation of trade secrets, and seeks as relief, among other things, a declaration that our ProTriTAC technology impermissibly competes in the
Maverick Field (as defined in the Asset Transfer Agreement), a preliminary and permanent injunction and unspecified damages. We believe that the
mechanism of action employed by our ProTriTAC platform falls outside the Maverick Field. On May 8, 2019, the court granted Millennium, a wholly
owned subsidiary of Takeda Pharmaceutical Company Limited, permission to intervene in the litigation based on a proposed complaint. On May 14, 2019,
Millennium filed a Complaint in Intervention, asserting various claims, including fraud and unjust enrichment, and seeking as relief, among other things, an
injunction and unspecified damages. A trial on Maverick and Millennium’s claims was held on September 9-13 and 17, 2019. The parties have completed
post-trial briefing and closing arguments and are awaiting a decision from the Court. We will vigorously defend the claims asserted against us.

56

 
In the event that an injunction is granted, we would be unable to proceed with development of our ProTriTAC platform until the injunction is lifted,
if ever and, if Millennium were to prevail on its claims, we could be required to pay damages. The various markets in which we plan to operate are subject
to frequent and extensive litigation regarding patents and other intellectual property rights. In addition, many companies in intellectual property-dependent
industries, including those producing therapeutics to treat and potentially cure cancer, have employed intellectual property litigation as a means to gain an
advantage over competitors. As a result, we may be required to defend against claims of intellectual property infringement that may be asserted by our
competitors against us and, if the outcome of any such litigation is adverse to us, it may affect our ability to compete effectively.

Third-party intellectual property right holders, including our competitors, may assert and actively bring infringement claims against us based on

existing or future intellectual property rights. The pharmaceutical and biotechnology industries have produced a significant number of patents, and it may
not always be clear to industry participants, including us, which patents cover various types of product candidates or methods of use. The coverage of
patents is subject to interpretation by the courts, and the interpretation is not always uniform.

If we are sued for patent infringement, we would need to demonstrate that our product candidates or platform technologies either do not infringe the

patent claims of a relevant patent or that the patent claims are invalid or unenforceable, and we may not be able to do this. Proving invalidity may be
difficult. For example, in the United States, proving invalidity in court requires a showing of clear and convincing evidence to overcome the presumption of
validity enjoyed by issued patents. Even if we are successful in these proceedings, we may incur substantial costs and the time and attention of our
management and scientific personnel could be diverted in pursuing these proceedings, which could have a material adverse effect on our business and
operations. In addition, we may not have sufficient resources to bring these actions to a successful conclusion. In addition, we may not be able to
successfully settle or otherwise resolve such infringement claims. If we are unable to successfully settle future claims on terms acceptable to us, we may be
required to engage or continue costly, unpredictable and time-consuming litigation and may be prevented from or experience substantial delays in
marketing our product candidates.

Our involvement in litigation, and in any interferences, opposition proceedings or other intellectual property proceedings inside and outside of the

United States may divert management from focusing on business operations, could cause us to spend significant amounts of money and may have no
guarantee of success. Any current and potential intellectual property litigation also could force us to do one or more of the following:

•

•

•

•

stop selling, incorporating, manufacturing or using our product candidates or any products, if approved, in the United States and/or other
jurisdictions that use the subject intellectual property;

obtain from a third party asserting its intellectual property rights, a license to sell or use the relevant technology, including the obligation to
pay royalties, which license may not be available on reasonable terms, or at all, or may be non-exclusive thereby giving our competitors
access to the same technologies licensed to us;

redesign those products or processes that use any allegedly infringing or misappropriated technology, which may result in significant cost or
delay to us, or which redesign could be technically infeasible; or

pay damages, including the possibility of treble damages and attorneys’ fees in a patent case if a court finds us to have willfully infringed
certain intellectual property rights.

Intellectual property litigation or other legal proceedings could cause us to spend substantial resources and distract our personnel from their
normal responsibilities.

Litigation or other legal proceedings relating to intellectual property claims, with or without merit, is unpredictable and generally expensive and

time consuming. Even if resolved in our favor, such litigation and other legal proceedings may cause us to incur significant expenses and is likely to divert
significant resources from our core business, including distracting our technical and management personnel from their normal responsibilities, and may
impact our reputation. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments
and if securities analysts or investors perceive these results to be negative, we could have a substantial adverse effect on the price of our common shares.
Such litigation or proceedings could substantially increase our operating losses and reduce our resources available for development activities. We may not
have sufficient financial or other resources to adequately conduct such litigation or proceedings. Some of our competitors may be able to sustain the costs
of such litigation or proceedings more effectively than we can because of their substantially greater financial resources. Uncertainties resulting from the
initiation and continuation of patent litigation or other proceedings could have a material adverse effect on our ability to compete in the marketplace.

57

 
 
 
 
 
We may need to obtain additional licenses of third-party technology that may not be available to us or are available only on commercially
unreasonable terms, and which may cause us to operate our business in a more costly or otherwise adverse manner that was not anticipated.

We currently have rights to the intellectual property, including patent applications relating to our TriTAC and ProTriTAC platforms and our product

candidates. From time to time, we may be required to license technologies relating to our therapeutic research programs from additional third parties to
further develop or commercialize our platform technologies and product candidates. Similarly, the targets of our product candidates have also been the
subject of research by many companies that have filed patent applications or have patents related to such targets and therapeutic methods relating to those
targets. There can be no assurance any such patents will not be asserted against us or that we will not need to seek licenses from such third parties. We may
not be able to secure such licenses on acceptable terms, if at all, and any such litigation would be costly and time-consuming.

Should we be required to obtain licenses to any third-party technology, including any such patents required to manufacture, use or sell our product
candidates, the growth of our business will likely depend in part on our ability to acquire, in-license, maintain or use these proprietary rights. The inability
to obtain any third-party license required to develop or commercialize any of our product candidates could cause us to abandon any related efforts, which
could seriously harm our business and operations.

In addition, our product candidates may require specific formulations to work effectively and efficiently and the rights to these formulations may be
held by others. We may be unable to acquire or in-license any compositions, methods of use, processes, or other third-party intellectual property rights from
third parties that we identify as necessary for our product candidates. The licensing and acquisition of third-party intellectual property rights is a
competitive area, and a number of more established companies are also pursuing strategies to license or acquire third-party intellectual property rights that
we may consider attractive. These established companies may have a competitive advantage over us due to their size, cash resources, and greater clinical
development and commercialization capabilities.

Our involvement in litigation, and in any interferences, opposition proceedings or other intellectual property proceedings inside and outside of the

United States may divert management from focusing on business operations, could cause us to spend significant amounts of money and may have no
guarantee of success. Any current and potential intellectual property litigation also could force us to do one or more of the following:

•

•

stop selling, incorporating, manufacturing or using our product candidates or any products, if approved, in the United States and/or other
jurisdictions that use the subject intellectual property;

obtain from a third party asserting its intellectual property rights, a license to sell or use the relevant technology, including the obligation to
pay royalties, which license may not be available on reasonable

In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to us. We also may be unable to license or

acquire third-party intellectual property rights on terms that would allow us to make an appropriate return on our investment. Even if we are able to obtain a
license, it may be non-exclusive, thereby giving our competitors access to the same technologies licensed to us. If we are unable to successfully obtain a
license to third-party intellectual property rights necessary for the development of a product candidate or program, we may have to abandon development
of that product candidate or program and our business and financial condition could suffer.

If our trademarks and trade names are not adequately protected, then we may not be able to build name recognition in our markets of interest and
our business may be adversely affected.

Our registered or unregistered trademarks or trade names may be challenged, infringed, circumvented or declared generic or determined to be
infringing on other marks. We may not be able to protect our rights to these trademarks and trade names, which we need to build name recognition by
potential collaborators, partners or customers in our markets of interest. Over the long term, if we are unable to establish name recognition based on our
trademarks and trade names, then we may not be able to compete effectively and our business may be adversely affected. If other entities use trademarks
similar to ours in different jurisdictions, or have senior rights to ours, it could interfere with our use of our current trademarks throughout the world.

During trademark registration proceedings, we may receive rejections. Although we would be given an opportunity to respond to those rejections,

we may be unable to overcome such rejections. In addition, in both the USPTO and comparable agencies in many foreign jurisdictions, third parties are
given an opportunity to oppose pending trademark applications and to seek to cancel registered trademarks. Opposition or cancellation proceedings may be
filed against our trademarks, which may not survive such proceedings. If we are unable to establish name recognition based on our trademarks and trade
names, we may not be able to compete effectively and our business may be adversely affected.

We may license our trademarks and trade names to third parties, such as distributors. Though these license agreements may provide guidelines for

how our trademarks and trade names may be used, a breach of these agreements or misuse of our trademarks and tradenames by our licensees may
jeopardize our rights in or diminish the goodwill associated with our trademarks and trade names.

58

 
 
 
Patent terms may be inadequate to protect our competitive position on our product candidates for an adequate amount of time.

Patents have a limited lifespan. In the United States, if all maintenance fees are timely paid, the natural expiration of a patent is generally 20 years

from its earliest U.S. non-provisional filing date. Various extensions may be available, but the life of a patent, and the protection it affords, is limited. Even
if patents covering our product candidates are obtained, once the patent life has expired for a product, we may be open to competition from competitive
medications, including biosimilar or generic medications. In addition, although upon issuance in the United States a patent’s life can be increased based on
certain delays caused by the United States Patent and Trademark Office, or the USPTO, this increase can be reduced or eliminated based on certain delays
caused by the patent applicant during patent prosecution. If we do not have sufficient patent life to protect our product candidates and any products, if
approved, our business and results of operations will be adversely affected. Given the amount of time required for the development, testing and regulatory
review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. As a result,
our patent portfolio may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours.

If we do not obtain protection under the Hatch-Waxman Amendments and similar non-U.S. legislation for extending the term of patents covering
each of our product candidates, our business may be materially harmed

Depending upon the timing, duration and conditions of FDA marketing approval of our product candidates, one or more of our U.S. patents may be

eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, referred to as the Hatch-Waxman
Amendments, and similar legislation in the European Union. The Hatch-Waxman Amendments permit a patent term extension of up to five years for a
patent covering an approved product as compensation for effective patent term lost during product development and the FDA regulatory review process.
However, we may not receive an extension if we fail to apply within applicable deadlines, fail to apply prior to expiration of relevant patents or otherwise
fail to satisfy applicable requirements. Moreover, the length of the extension could be less than we request. If we are unable to obtain patent term extension
or the term of any such extension is less than we request, the period during which we can enforce our patent rights for that product will be shortened and
our competitors may obtain approval to market competing products sooner. As a result, our revenue from applicable products could be reduced, possibly
materially.

We enjoy only limited geographical protection with respect to certain patents and may not be able to protect our intellectual property rights
throughout the world.

Patents are of national or regional effect. While we will endeavor to try to protect our technologies, products and product candidates with intellectual

property rights such as patents, as appropriate, the process of obtaining patents is time-consuming, expensive and sometimes unpredictable in other
countries. As such, we may not be able to prevent third parties from practicing our inventions in all countries outside the United States, or from selling or
importing products made using our inventions in and into the United States or other jurisdictions.

International applications under the Patent Cooperation Treaty, or PCT, are usually filed within 12 months after the priority filing. Based on the PCT
filing, national and regional patent applications may be filed in additional jurisdictions where we believe our product candidates may be marketed. We have
so far not filed for patent protection in all national and regional jurisdictions where such protection may be available. Filing, prosecuting and defending
patents on all of our research programs and product candidates in all countries throughout the world would be prohibitively expensive, and our intellectual
property rights in some countries outside the United States can be less extensive than those in the United States. In addition, we may decide to abandon
national and regional patent applications before grant. Finally, the grant proceeding of each national/regional patent is an independent proceeding which
may lead to situations in which applications might in some jurisdictions be refused by the relevant patent offices, while granted by others. Further, the
standards applied by the USPTO and foreign patent offices in granting patents are not always applied uniformly or predictably. It is common that
depending on the country, the scope of patent protection may vary for the same product candidate and/or technology. As such, we do not know the degree
of future protection that we will have on our technologies and product candidates.

Competitors may use our or our collaboration partners’ technologies in jurisdictions where we have not obtained patent protection to develop their

own products and, further, may export otherwise infringing products to territories where we or our collaboration partners have patent protection, but
enforcement is not as strong as that in the United States. These products may compete with our product candidates, and our or our collaboration partners’
patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

The laws of some jurisdictions, particularly certain developing countries, do not protect intellectual property rights, particularly those relating to

pharmaceuticals or biologics, to the same extent as laws in the United States, and many companies have encountered significant difficulties in protecting
and defending such rights in such jurisdictions. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries
outside the United States, or from selling or importing products made using our inventions in and into the United States or other jurisdictions. If we
encounter difficulties in protecting, or are otherwise precluded from effectively protecting, the intellectual property rights important for our business in
such jurisdictions, the value of these rights may be diminished and we may face additional competition from others in those jurisdictions.

59

 
Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other
aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing, and
could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate and the damages or other remedies awarded, if
any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain
significant commercial advantage from the intellectual property that we develop or license.

Some countries, including China and India, have compulsory licensing laws under which a patent owner may be compelled to grant licenses to third
parties. In addition, some countries limit the enforceability of patents against government agencies or government contractors. In these countries, the patent
owner may have limited remedies, which could materially diminish the value of such patent. If we are forced to grant a license to third parties with respect
to any patents relevant to our business, our competitive position may be impaired and our business and results of operations may be adversely affected.

We may become subject to claims challenging the inventorship or ownership of our patents and other intellectual property.

We may be subject to claims that former employees, consultants, independent contractors, collaborators or other third parties have an interest in our

patents or other intellectual property as an owner, co-owner, inventor or co-inventor. The failure to name the proper inventors on a patent application can
result in the patents issuing thereon being unenforceable. Inventorship disputes may arise from conflicting views regarding the contributions of different
individuals named as inventors, the effects of foreign laws where foreign nationals are involved in the development of the subject matter of the patent,
conflicting obligations of third parties involved in developing our product candidates or as a result of questions regarding co-ownership of potential joint
inventions. Litigation may be necessary to resolve these and other claims challenging inventorship and/or ownership. Alternatively, or additionally, we may
enter into agreements to clarify the scope of our rights in such intellectual property. If we fail in defending any such claims, in addition to paying monetary
damages, we may lose valuable intellectual property rights, such as exclusive ownership of, or right to use, valuable intellectual property. Such an outcome
could have a material adverse effect on our business. Even if we are successful in defending against such claims, litigation could result in substantial costs
and be a distraction to management and other employees.

Intellectual property rights do not necessarily address all potential threats to our competitive advantage.

The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations, and may

not adequately protect our business, or permit us to maintain our competitive advantage. The following examples are illustrative:

•

•

•

•

•

•

•

•

•

•

•

others may be able to make product candidates similar to our product candidates but that are not covered by the claims of the patents that we
own or have exclusively licensed;

the patents of third parties may have an adverse effect on our business;

we or any future strategic partners might not have been the first to conceive or reduce to practice the inventions covered by the issued patent
or pending patent application that we own or have exclusively licensed;

we or any future strategic partners might not have been the first to file patent applications covering certain of our inventions;

others may independently develop similar or alternative technologies or duplicate any of our technologies without infringing our intellectual
property rights;

it is possible that our pending patent applications will not lead to issued patents;

issued patents that we own or have exclusively licensed may not provide us with any competitive advantage, or may be held invalid or
unenforceable, as a result of legal challenges by our competitors;

we cannot predict the degree and range of protection any issued patents will afford us against competitors, whether or not others will obtain
patents claiming aspects similar to those covered by our patents and patent applications, or whether we will need to initiate litigation or
administrative proceedings which may be costly whether we win or lose;

our competitors might conduct research and development activities in countries where we do not have patent rights and then use the
information learned from such activities to develop competitive products for sale in our major commercial markets;

third parties performing manufacturing or testing for us using our product candidates or technologies could use the intellectual property of
others without obtaining a proper license; and

we may not develop additional technologies that are patentable.

60

 
 
 
 
 
 
 
 
 
 
 
 
Should any of these events occur, they could significantly harm our business, results of operations and prospects.

Composition of matter patents for biological and pharmaceutical products such as our product candidates are generally considered to be the
strongest form of intellectual property protection for those types of products, as such patents provide protection without regard to any method of use. We
cannot be certain that the claims in our pending patent applications covering composition of matter of our product candidates will be considered patentable
by the USPTO or by patent offices in foreign countries, or that the claims in any of our issued patents will be considered valid and enforceable by courts in
the United States or foreign countries. Method of use patents protect the use of a product for the specified method. This type of patent does not prevent a
competitor from making and marketing a product that is identical to our product for an indication that is outside the scope of the patented method.
Moreover, even if competitors do not actively promote their product for our targeted indications, physicians may prescribe these products “off-label.”
Although off-label prescriptions may infringe or contribute to the infringement of method of use patents, the practice is common and such infringement is
difficult to prevent or prosecute.

Changes in patent laws or patent jurisprudence could diminish the value of patents in general, thereby impairing our ability to protect our product
candidates.

As is the case with other biopharmaceutical companies, our success is heavily dependent on intellectual property, particularly patents. Obtaining and

enforcing patents in the biopharmaceutical industry involve both technological complexity and legal complexity. Recent U.S. Supreme Court rulings have
narrowed the scope of patent protection available in certain circumstances and weakened the rights of patent owners in certain situations. Therefore,
obtaining and enforcing biopharmaceutical patents is costly, time-consuming and inherently uncertain.

In September 2011, the America Invents Act, or the AIA, was enacted in the United States, resulting in significant changes to the U.S. patent
system. An important change introduced by the AIA was a transition to a “first-to-file” system for deciding which party should be granted a patent when
two or more patent applications are filed by different parties claiming the same invention, which went into effect on March 16, 2013. Therefore, a third
party that now files a patent application in the USPTO before we do could be awarded a patent covering an invention of ours even if we created the
invention before it was created by the third party. While we are cognizant of the time from invention to filing of a patent application, circumstances could
prevent us from promptly filing patent applications for our inventions.

Among some of the other changes introduced by the AIA were changes that limit where a patentee may file a patent infringement suit and providing

opportunities for third parties to challenge any issued patent in the USPTO. This applies to all of our U.S. patents, even those issued before March 16,
2013. Because of a lower evidentiary standard in USPTO proceedings compared to the evidentiary standard in U.S. federal courts necessary to invalidate a
patent claim, a third party could potentially provide evidence in a USPTO proceeding sufficient for the USPTO to hold a claim invalid even though the
same evidence would be insufficient to invalidate the claim if first presented in a district court action. Accordingly, a third party may attempt to use the
USPTO procedures to invalidate our patent claims that would not have been invalidated if first challenged by the third party as a defendant in a district
court action. The AIA and its continued implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications,
and the patent applications of our collaborators, and the enforcement or defense of our issued patents.

Depending on decisions by the U.S. Congress, the federal courts, and the USPTO, the laws and regulations governing patents could change in
unpredictable ways that could weaken our ability to obtain new patents or to enforce our existing patents and patents that we might obtain in the future. For
example, in the recent case, Assoc. for Molecular Pathology v. Myriad Genetics, Inc., the U.S. Supreme Court held that certain claims to DNA molecules
are not patentable. While we do not believe that any of the patents owned or licensed by us will be found invalid based on this decision, we cannot predict
how future decisions by the courts, the U.S. Congress or the USPTO may impact the value of our patents. Similarly, there is complexity and uncertainty
related to European patent laws. For example, the European Patent Convention was amended in April 2010 to limit the time permitted for filing divisional
applications. In addition, the European Patent Convention patent system is relatively stringent in the type of amendments that are allowed during
prosecution. These limitations and requirements could adversely affect our ability to obtain new patents in the future that may be important for our
business.

We may rely on trade secret and proprietary know-how, which can be difficult to trace and enforce and, if we are unable to protect the
confidentiality of our trade secrets, our business and competitive position would be harmed.

In addition to seeking patents for some of our technology and product candidates, we may rely on trade secrets and/or confidential know-how to

protect our technology, especially where patent protection is believed to be of limited value, to maintain our competitive position with respect to our
research programs and product candidates. Elements of our product candidates, including processes for their preparation and manufacture, may involve
proprietary know-how, information, or technology that is not covered by patents, and thus for these aspects we may consider trade secrets and know-how to
be our primary intellectual property. Any disclosure, either intentional or unintentional, by our employees or by other third parties of our trade secrets or
proprietary information could enable competitors to duplicate or surpass our technological achievements, thus adversely eroding our competitive position
in our market.

61

 
Trade secrets and/or confidential know-how can be difficult to protect or maintain as confidential. To protect this type of information against
disclosure or appropriation by competitors, our policy is to require our employees, consultants, contractors, collaborators, advisors and other third parties to
enter into confidentiality agreements with us. Despite these efforts, any of these parties may unintentionally or willfully breach the agreements and disclose
our confidential information, and confidentiality agreements may not provide an adequate remedy in the event of unauthorized disclosure of confidential
information. Monitoring unauthorized uses and disclosures is difficult, and we do not know whether the steps we have taken to protect our proprietary
technologies will be effective. Enforcing a claim that a third party obtained illegally and is using trade secrets and/or confidential know-how is also
expensive, time consuming and unpredictable. The enforceability of confidentiality agreements may vary from jurisdiction to jurisdiction. The laws of
some foreign countries do not protect proprietary rights to the same extent or in the same manner as the laws of the United States. As a result, we may
encounter significant problems in protecting and defending our intellectual property both in the United States and abroad. Furthermore, if a competitor
lawfully obtained or independently developed any of our trade secrets, we would have no right to prevent such competitor from using that technology or
information to compete with us, which could harm our competitive position. Additionally, if the steps taken to maintain our trade secrets are deemed
inadequate, we may have insufficient recourse against third parties for misappropriating the trade secret. In addition, some courts inside and outside the
United States are less willing or unwilling to protect trade secrets or other proprietary information.

Trade secrets can over time be disseminated within the industry through independent development, the publication of journal articles and the
movement of personnel skilled in the art from company to company or academic to industry scientific positions. Though our agreements with third parties
typically restrict the ability of our employees, consultants, contractors, collaborators, advisors and other third parties to publish data potentially relating to
our trade secrets, our agreements may contain certain limited publication rights. Because from time to time we expect to rely on third parties in the
development, manufacture and distribution of our product candidates and provision of our services, we must, at times, share trade secrets with them.
Despite employing the contractual and other security precautions described above, the need to share trade secrets increases the risk that such trade secrets
become known by our competitors, are inadvertently incorporated into the technology of others, or are disclosed or used in violation of these agreements. If
any of our trade secrets were to be lawfully obtained or independently developed by a competitor or other third party, we would have no right to prevent
them from using that technology or information to compete with us. If any of our trade secrets were to be disclosed to or independently developed by a
competitor or other third party, our competitive position would be harmed.

In addition, our competitors may independently develop substantially equivalent trade secrets, proprietary information or know-how and may even
apply for patent protection in respect of the same. If successful in obtaining such patent protection, our competitors could limit our use of our trade secrets
and/or confidential know-how. Under certain circumstances and to guarantee our freedom to operate, we may also decide to publish some know-how to
prevent others from obtaining patent rights covering such know-how.

We may be subject to third-party claims asserting that our employees, consultants, contractors, collaborators or advisors have misappropriated or
wrongfully used or disseminated their intellectual property, or claiming ownership of what we regard as our own intellectual property.

Many of our employees, including our senior management, were previously employed at universities or at other biopharmaceutical companies,

including our competitors or potential competitors. Some of these employees executed proprietary rights, non-disclosure and non-competition agreements
in connection with such previous employment. Similarly, we work with consultants, contractors, collaborators, advisors or other third parties who have
worked with, and do currently work with, other companies, including our competitors or potential competitors, and have executed proprietary rights, non-
disclosure and non-competition agreements in connection with such other companies. Although we try to ensure that our employees, consultants,
contractors, collaborators, advisors or other third parties do not use or disclose the proprietary information or know-how of others in their work for us, we
may be subject to claims that we or these employees or individuals that we work with have used or disclosed confidential information or intellectual
property of others, including trade secrets or other proprietary information, or that we caused an individual to breach the terms of his or her non-
competition or non-solicitation agreement with a current or former employer or competitor.

Litigation may be necessary to defend against these claims and, even if we are successful, could result in substantial costs and could be a distraction

to management, our employees and our routine business. If we fail in prosecuting or defending any such claims, in addition to paying monetary damages,
we may lose valuable intellectual property rights or personnel or sustain damages. Such intellectual property rights could be awarded to a third party, and
we could be required to obtain a license from such third party to develop or commercialize our technology or product candidates. Such a license may not be
available on commercially reasonable terms or at all. Moreover, any such litigation or the threat thereof may adversely affect our reputation and our ability
to form strategic alliances or sublicense our rights to collaborators, engage with scientific advisors or hire employees or consultants, each of which would
have an adverse effect on our business, results of operations and financial condition.

62

 
Obtaining and maintaining our patent protection depends on compliance with various procedural, document submission, fee payment and other
requirements imposed by governmental patent agencies, and our patent protection could be reduced or eliminated for non-compliance with these
requirements.

Periodic maintenance and annuity fees on any issued patent are due to be paid to the USPTO and foreign patent agencies in several stages over the

lifetime of the patent. The USPTO and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee
payment and other similar provisions during the patent application process. While an inadvertent lapse can in many cases be cured by payment of a late fee
or by other means in accordance with the applicable rules, there are situations in which noncompliance can result in abandonment or lapse of the patent or
patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. Non-compliance events that could result in abandonment
or lapse of a patent or patent application include failure to respond to official actions within prescribed time limits, non-payment of fees and failure to
properly legalize and submit formal documents. If we fail to maintain the patents and patent applications covering our product candidates, our competitors
might be able to enter the market, which would have an adverse effect on our business.

We may be subject to claims challenging the inventorship of our patents and other intellectual property.

We may in the future be subject to claims that former employees, collaborators, or other third parties have an interest in our patents or other

intellectual property as an inventor or co-inventor. For example, we may have inventorship disputes arise from conflicting obligations of consultants or
others who are involved in developing our product candidates. Litigation may be necessary to defend against these and other claims challenging
inventorship. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights, such as
exclusive ownership of, or right to use, valuable intellectual property. Such an outcome could have a material adverse effect on our business. Even if we are
successful in defending against such claims, litigation could result in substantial costs and be a distraction to management and other employees.

Use of social media could give rise to liability, breaches of data security, or reputational harm.

We and our employees use social media to communicate externally. There is risk that the use of social media by us or our employees to

communicate about our product candidates or business may give rise to liability, lead to the loss of trade secrets or other intellectual property, or result in
public exposure of personal information of our employees, clinical trial patients, customers, and others. Furthermore, negative posts or comments about us
or our product candidates in social media could seriously damage our reputation, brand image, and goodwill. Any of these events could have a material
adverse effect on our business, prospects, operating results, and financial condition and could adversely affect the price of our common stock.

Our computer systems, or those used by our CROs or other contractors or consultants, may fail or suffer security breaches, which could adversely
affect our business.

Despite the implementation of security measures, our computer systems and data and those of our current or future CROs or other contractors and

consultants are vulnerable to failure, interruption, compromise or damage from computer hacking, malicious software, fraudulent activity, employee
misconduct, human error, telecommunication and electrical failures, natural disasters, public health epidemics, such as the coronavirus disease (COVID-19)
currently impacting multiple jurisdictions worldwide, including the United States, or other cybersecurity attacks or accidents. Future acquisitions could
expose us to additional cybersecurity risks and vulnerabilities from any newly acquired information technology infrastructure. Cybersecurity attacks are
constantly increasing in sophistication and are made by groups and individuals with a wide range of motives (including industrial espionage) and expertise,
including by organized criminal groups, “hacktivists,” nation states and others. As a company with an increasingly global presence, our systems are subject
to frequent attacks. Due to the nature of some of these attacks, there is a risk that an attack may remain undetected for a period of time. While we continue
to make investments to improve the protection of data and information technology, there can be no assurance that our efforts will prevent service
interruptions or security breaches.

Any cybersecurity incident could adversely affect our business, by leading to, for example, the loss of trade secrets or other intellectual property,
demands for ransom or other forms of blackmail or the unauthorized disclosure of personal or other sensitive information of our employees, clinical trial
patients, customers and others. Although to our knowledge we have not experienced any material cybersecurity incident to date, if such an event were to
occur, it could seriously harm our development programs and our business operations. We could be subject to regulatory actions taken by governmental
authorities, litigation under laws that protect the privacy of personal information, or other forms of legal proceedings, which could result in significant
liabilities or penalties. Further, a cybersecurity incident may disrupt our business or damage our reputation, which could have a material adverse effect on
our business, prospects, operating results, share price and stockholder value, and financial condition. We could also incur substantial remediation costs,
including the costs of investigating the incident, repairing or replacing damaged systems, restoring normal business operations, implementing increased
cybersecurity protections, and paying increased insurance premiums.

63

 
Risks Related to Ownership of Our Common Stock

Our stock price may be volatile or may decline regardless of our operating performance, resulting in substantial losses for investors.

The market price of our common stock may be highly volatile and may fluctuate substantially as a result of a variety of factors, some of which are

related in complex ways. Since shares of our common stock were sold in our initial public offering in February 2019 at a price of $14.00 per share, the
reported high and low sales prices of our common stock through February 29, 2020 has ranged from $9.07 to $21.47.

The market price of our common stock may fluctuate significantly in response to numerous factors, many of which are beyond our control,

including the factors listed below and other factors describe in this “Risk Factors” section:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the anticipated results of our Phase 1 trial of HPN424 and Phase 1/2a trial of HPN536 and the commencement, enrollment or results of our
planned Phase 1/2 clinical trial of HPN217 and Phase 1/2a clinical trial of HPN328, any other future preclinical studies and clinical trials and
trials we may conduct, or changes in the development status of our product candidates;

any delay in our regulatory filings for our product candidates and any adverse development or perceived adverse development with respect to
the applicable regulatory authority’s review of such filings, including without limitation the issuance by the FDA of a “refusal to file” letter or
a request for additional information;

adverse results or delays in clinical trials;

our decision to initiate a preclinical study or clinical trial, not to initiate a preclinical study or clinical trial or to terminate an existing clinical
study or trial;

adverse actions taken by regulatory agencies with respect to our preclinical studies or clinical trials, manufacturing supply chain or sales and
marketing activities, including failure to receive regulatory approval of our product candidates;

changes in laws or regulations, including but not limited to preclinical study or clinical trial requirements for approvals;

any adverse changes to our relationship with manufacturers or suppliers;

manufacturing, supply or distribution shortages;

litigation involving us, our industry or both, or investigations by regulators into our operations or those of our competitors;

our failure to commercialize our product candidates;

additions or departures of key scientific or management personnel;

unanticipated serious safety concerns related to the use of our product candidates;

disputes or other developments relating to proprietary rights, including patents, litigation matters and our ability to obtain patent protection
for our technologies;

variations in our results of operations;

our cash position;

our failure to meet the estimates and projections of the investment community or that we may otherwise provide to the public;

publication of research reports about us or our industry, or immuno-oncology in particular, or positive or negative recommendations or
withdrawal of research coverage by securities analysts;

announcements made by us or our competitors of new product and service offerings, acquisitions, strategic relationships, joint ventures or
capital commitments;

our inability to establish collaborations, if needed;

our ability to effectively manage our growth;

the size of our initial cancer target markets;

our ability to successfully treat additional types of cancers or at different stages;

changes in the market valuations of similar companies;

64

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
•

•

•

•

•

•

•

•

press reports, whether or not true, about our business;

sales or perceived potential sales of our common stock by us or our stockholders in the future;

overall fluctuations in the equity markets;

ineffectiveness of our internal controls;

changes in accounting practices or principles;

changes or developments in the global regulatory environment;

general political and economic conditions; and

other events or factors, many of which are beyond our control.

In addition, the stock markets have experienced extreme price and volume fluctuations that have affected and continue to affect the market prices of

equity securities of many biopharmaceutical companies. Stock prices of many biopharmaceutical companies have fluctuated in a manner unrelated or
disproportionate to the operating performance of those companies. If we were to become involved in securities litigation, it could subject us to substantial
costs, divert resources and the attention of management from our business and adversely affect, our business, operating results, financial condition and cash
flows.

Our principal stockholders and management own a significant percentage of our stock and will be able to exert significant control over matters
subject to stockholder approval.

As of February 29, 2020, our executive officers, directors, holders of 5% or more of our capital stock and their respective affiliates owned
approximately 69.2% of our outstanding voting stock.  Therefore, these stockholders will have the ability to influence us through this ownership position.
These stockholders may be able to determine all matters requiring stockholder approval. For example, these stockholders may be able to control elections
of directors, amendments of our organizational documents, or approval of any merger, sale of assets, or other major corporate transaction. This may prevent
or discourage unsolicited acquisition proposals or offers for our common stock that you may feel are in your best interest as one of our stockholders.

Sales of substantial amounts of our outstanding common stock in the public market could cause our common stock price to fall.

Our common stock price could decline as a result of sales of a large number of shares of common stock or the perception that these sales could

occur. These sales, or the possibility that these sales may occur, might also make it more difficult for us to sell equity securities in the future at a time and
price that we deem appropriate.

Certain of our stockholders have rights, subject to some conditions, that to require us to file registration statements covering the sale of their shares
or to include their shares in registration statements that we may file for ourselves or our other stockholders. We have also registered the offer and sale of all
shares of common stock that we issued under our equity compensation plans. These shares may accordingly be sold in the public market upon issuance,
subject to vesting conditions and, in the case of our directors, officers and other affiliates, restrictions that may apply under Rule 144 promulgated under the
Securities Act of 1933, as amended, or the Securities Act.

In addition, in the future, we may issue shares of common stock, or other equity or debt securities convertible into common stock, in connection

with a financing, acquisition, employee arrangement or otherwise. Any such issuance could result in substantial dilution to our existing stockholders and
could cause the price of our common stock to decline.

An active trading market for our common stock may not be sustained.

Our common stock is currently listed on the NASDAQ Global Select Market under the symbol “HARP”. The price for our common stock may vary
and an active or liquid market in our common stock may not be sustainable. The lack of an active market may impair the value of your shares, your ability
to sell your shares at the time you wish to sell them and the prices that you may obtain for your shares. An inactive market may also impair our ability to
raise capital by selling our common stock and our ability to acquire other companies, products or technologies by using our common stock as
consideration.

If securities or industry analysts either do not publish research about us or publish inaccurate or unfavorable research about us, our business or
our market, or if they change their recommendations regarding our common stock adversely, the trading price or trading volume of our common
stock could decline.

The trading market for our common stock is influenced in part by the research and reports that securities or industry analysts may publish about us,
our business, our market or our competitors. If one or more of these analysts initiate research with an unfavorable rating or downgrade our common stock,
provide a more favorable recommendation about our competitors or publish inaccurate or unfavorable research about our business, our common stock price
would likely decline. If any analyst who may cover us were to cease coverage of us or fail to regularly publish reports on us, we could lose visibility in the
financial markets, which in turn could cause the trading price or trading volume of our common stock to decline.

65

 
 
 
 
 
 
 
 
 
If we are unable to maintain effective internal control over financial reporting, it could result in material misstatements in our financial statements
and cause investors to lose confidence in the accuracy and completeness of our financial reports, either of which could adversely affect the market
price of our common stock.

Ensuring that we have adequate internal financial and accounting controls and procedures in place so that we can produce accurate financial
statements on a timely basis is a costly and time-consuming effort that needs to be re-evaluated frequently. Our internal control over financial reporting is a
process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements in accordance
with GAAP. We are required to document, review and improve our internal controls and procedures for compliance with Section 404 of the Sarbanes-Oxley
Act of 2002, or the Sarbanes-Oxley Act, which requires annual management assessment of the effectiveness of our internal control over financial reporting.
If we are unable to maintain effective internal control over financial reporting, the accuracy and timing of our financial reporting, and our stock price, may
be adversely affected and we may be unable to maintain compliance with the applicable stock exchange listing requirements.

Implementing any appropriate changes to our internal controls may distract our officers and employees, entail substantial costs to modify our

existing processes and take significant time to complete. These changes may not, however, be effective in maintaining the adequacy of our internal
controls, and any failure to maintain that adequacy, or consequent inability to produce accurate financial statements on a timely basis, could increase our
operating costs and harm our business. In addition, investors’ perceptions that our internal controls are inadequate or that we are unable to produce accurate
financial statements on a timely basis may harm our stock price.

We are an emerging growth company and a smaller reporting company, and any decision on our part to comply only with applicable reduced

reporting and disclosure requirements could make our common stock less attractive to investors.

We are an “emerging growth company” as defined in the JOBS Act and, for as long as we continue to be an emerging growth company, we may

choose to take advantage of exemptions from various reporting requirements applicable to other public companies but not to emerging growth companies,
including:

•

•

•

not being required to have our independent registered public accounting firm audit our internal control over financial reporting under Section
404 of the Sarbanes-Oxley Act;

reduced disclosure obligations regarding executive compensation in our periodic reports and annual report on Form 10-K; and

exemptions from the requirements of holding non-binding advisory votes on executive compensation and stockholder approval of any golden
parachute payments not previously approved.

We could be an emerging growth company for up to five years following the completion of our initial public offering. Our status as an emerging

growth company will end as soon as any of the following takes place:

•

•

•

•

the last day of the fiscal year in which we have more than $1.07 billion in gross annual revenue;

the date we qualify as a “large accelerated filer,” with at least $700 million of equity securities held by non-affiliates;

the date on which we have issued, in any three-year period, more than $1.0 billion in non-convertible debt securities; or

the last day of the fiscal year ending after the fifth anniversary of the completion of our initial public offering.

We cannot predict if investors will find our common stock less attractive if we choose to rely on any of the exemptions afforded to emerging growth
companies. If some investors find our common stock less attractive because we rely on any of these exemptions, there may be a less active trading market
for our common stock and the market price of our common stock may be more volatile.

Under the JOBS Act, emerging growth companies can also delay adopting new or revised accounting standards until such time as those standards
apply to private companies. We elected to use this extended transition period for complying with new or revised accounting standards that have different
effective dates for public and private companies until the earlier of the date that we (i) are no longer an emerging growth company or (ii) affirmatively and
irrevocably opt out of the extended transition period provided in the JOBS Act. As a result, these financial statements may not be comparable to companies
that comply with the new or revised accounting pronouncements as of public company effective dates.

We are also a “smaller reporting company” as defined in the Securities Exchange Act of 1934, as amended. We may continue to be a smaller

reporting company even after we are no longer an emerging growth company. We may take advantage of certain of the scaled disclosures available to
smaller reporting companies and will be able to take advantage of these scaled disclosures for so long as our voting and non-voting common stock held by
non-affiliates is less than $250.0 million measured on the last business day of our second fiscal quarter, or our annual revenue is less than $100.0 million
during the most recently completed fiscal year and our voting and non-voting common stock held by non-affiliates is less than $700.0 million measured on
the last business day of our second fiscal quarter.

66

 
 
 
 
 
 
 
 
The requirements of being a public company may strain our resources, result in litigation and divert management’s attention.

As a public company, we are subject to the reporting requirements of the Exchange Act, the Sarbanes-Oxley Act, the Dodd-Frank Wall Street

Reform and Consumer Protection Act, or the Dodd-Frank Act, the listing requirements of The NASDAQ Global Select Market, or NASDAQ, and other
applicable securities rules and regulations. Complying with these rules and regulations has increased and will increase our legal and financial compliance
costs, make some activities more difficult, time consuming or costly and increase demand on our systems and resources. The Exchange Act requires,
among other things, that we file annual, quarterly and current reports with respect to our business and operating results. The Sarbanes-Oxley Act requires,
among other things, that we maintain effective disclosure controls and procedures and internal control over financial reporting. We are required to disclose
changes made in our internal control and procedures on a quarterly basis. In order to maintain and, if required, improve our disclosure controls and
procedures and internal control over financial reporting to meet this standard, significant resources and management oversight may be required. As a result,
management’s attention may be diverted from other business concerns, which could adversely affect our business and operating results. We may also need
to hire additional employees or engage outside consultants to comply with these requirements, which will increase our costs and expenses.

In addition, changing laws, regulations and standards relating to corporate governance and public disclosure are creating uncertainty for public

companies, increasing legal and financial compliance costs and making some activities more time consuming. These laws, regulations and standards are
subject to varying interpretations, in many cases due to their lack of specificity and, as a result, their application in practice may evolve over time as new
guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs
necessitated by ongoing revisions to disclosure and governance practices. We intend to invest resources to comply with evolving laws, regulations and
standards, and this investment may result in increased general and administrative expenses and a diversion of management’s time and attention from
revenue-generating activities to compliance activities. If our efforts to comply with new laws, regulations and standards differ from the activities intended
by regulatory or governing bodies due to ambiguities related to their application and practice, regulatory authorities may initiate legal proceedings against
us and our business may be adversely affected.

These new rules and regulations may make it more expensive for us to obtain director and officer liability insurance and, in the future, we may be
required to accept reduced coverage or incur substantially higher costs to obtain coverage. These factors could also make it more difficult for us to attract
and retain qualified members of our board of directors, particularly to serve on our audit committee and compensation committee, and qualified executive
officers.

By disclosing information in filings required of a public company, our business and financial condition are more visible, which we believe may
result in threatened or actual litigation, including by competitors and other third parties. If those claims are successful, our business could be seriously
harmed. Even if the claims do not result in litigation or are resolved in our favor, the time and resources needed to resolve them could divert our
management’s resources and seriously harm our business.

We do not currently intend to pay dividends on our common stock and, consequently, our stockholders’ ability to achieve a return on their

investment will depend on appreciation of the value of our common stock.

We have never declared or paid cash dividends on our common stock. We currently intend to retain all available funds and any future earnings to

support operations and to finance the growth and development of our business. We do not intend to declare or pay any cash dividends on our capital stock
in the foreseeable future. As a result, any investment return on our common stock will depend upon increases in the value for our common stock, which is
not certain.

Delaware law and provisions in our amended and restated certificate of incorporation and amended and restated bylaws, each of which will be

in effect immediately after the completion of our initial public offering, could make a merger, tender offer or proxy contest difficult, thereby depressing
the trading price of our common stock.

Our amended and restated certificate of incorporation and amended and restated bylaws contain provisions that could depress the trading price of

our common stock by acting to discourage, delay or prevent a change of control of our company or changes in our management that our stockholders may
deem advantageous. These provisions include the following:

•

•

•

•

establish a classified board of directors so that not all members of our board of directors are elected at one time;

permit our board of directors to establish the number of directors and fill any vacancies and newly created directorships;

provide that members of our board of directors may only be removed for cause;

require super-majority voting to amend certain provisions of our amended and restated certificate of incorporation and amended and restated
bylaws;

67

 
 
 
 
 
 
 
 
•

•

•

•

•

•

authorize the issuance of “blank check” preferred stock that our board of directors could use to implement a stockholder rights plan;

eliminate the ability of our stockholders to call special stockholder meetings;

prohibit stockholder action by written consent, which requires all stockholder actions to be taken at stockholder meetings;

provide that our board of directors is expressly authorized to make, alter or repeal our amended and restated bylaws;

restrict the forum for certain litigation against us to Delaware; and

establish advance notice requirements for nominations for election to our board of directors or for proposing matters that can be acted upon
by stockholders at annual stockholder meetings.

Any provision of our amended and restated certificate of incorporation, our amended and restated bylaws or Delaware law that has the effect of

delaying or deterring a change in our control could limit the opportunity for our stockholders to receive a premium for their shares of our common stock,
and could also affect the price that some investors are willing to pay for our common stock.

Our amended and restated certificate of incorporation provide that the Court of Chancery of the State of Delaware will be the exclusive forum
for certain disputes between us and our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with
us or our directors, officers or employees.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware (or, if and only if the Court of

Chancery of the State of Delaware lacks subject matter jurisdiction, any state court located within the State of Delaware or, if and only if all such state
courts lack subject matter jurisdiction, the federal district court for the District of Delaware), to the fullest extent permitted by applicable law, is the
exclusive forum for:

•

•

•

•

any derivative action or proceeding brought on our behalf;

any action asserting a breach of fiduciary duty;

any action asserting a claim against us arising under the Delaware General Corporation Law, or the DGCL, our amended and restated
certificate of incorporation or our amended and restated bylaws; and

any action asserting a claim against us that is governed by the internal-affairs doctrine.

However, this exclusive forum provision would not apply to suits brought to enforce a duty or liability created by the Exchange Act. Furthermore,
this provision applies to Securities Act claims and Section 22 of the Securities Act creates concurrent jurisdiction for federal and state courts over all suits
brought to enforce any duty or liability created by the Securities Act or the rules and regulations thereunder. Accordingly, there is uncertainty as to whether
a court would enforce such provision, and our stockholders will not be deemed to have waived our compliance with the federal securities laws and the rules
and regulations thereunder.

This exclusive-forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or

our directors, officers or other employees, which may discourage lawsuits against us and our directors, officers and other employees.

Our ability to use our net operating loss carryforwards and other tax attributes may be limited.

Our U.S. net operating loss, or NOL, carryforwards and tax credit carryforwards are potentially subject to annual utilization limits under Sections

382 and 383 of the Internal Revenue Code of 1986, as amended, or the Code. Our U.S. NOL carryforwards arising prior to 2018 and tax credit
carryforwards could expire unused and be unavailable to offset future taxable income or income tax liabilities because of their limited duration or because
of restrictions under U.S. tax law. Our U.S. NOL carryforwards arising after 2017 carryforward indefinitely but are subject to limitations. Under Sections
382 and 383 of the Code, if a corporation undergoes an “ownership change,” generally defined as a greater than 50 percentage point change (by value) in
its equity ownership during a rolling three-year period, the corporation’s ability to use its pre-change tax attributes, such as NOLs and R&D tax credits, to
offset its post-change income or taxes may be limited. We have not performed an analysis under Section 382 of the Code and cannot predict or otherwise
determine whether our federal tax attribute carryforwards may be limited in the future. As a result, if we earn taxable income in the future, our ability to use
existing U.S. NOL and R&D tax credit carryforwards to reduce U.S. taxable income or tax liability may be subject to limitations. This could adversely
impact our future operating results by increasing our future tax liabilities. Similar rules may also limit our ability to use accumulated state tax attributes to
reduce our state tax liabilities. Also, there may be periods when the use of NOLs is suspended or otherwise limited at the state level, which could accelerate
or permanently increase state taxes owed.

68

 
 
 
 
 
 
 
 
 
 
 
We may have ownership changes in the future, due to further changes in our stock ownership. Some of these ownership changes could be outside of

our control. If an ownership change occurs and our ability to use our historical NOL and tax credit carryforwards is limited, it could adversely impact our
future operating results by increasing our tax obligations.

New or future changes to tax laws could materially adversely affect our company.

The Tax Act, which was enacted on December 22, 2017, significantly amended the Code. Future guidance from the U.S. Internal Revenue Service
and other tax authorities with respect to the Tax Act may affect us, and certain aspects of the Tax Act could be repealed or modified in future legislation.
Changes in corporate tax rates, the realization of net deferred tax assets relating to our U.S. operations, the taxation of foreign earnings, and the
deductibility of expenses under the Tax Act or future tax reform legislation could have a material impact on the value of our deferred tax assets, could
result in significant one-time charges in the current or future taxable years, and could increase our future U.S. tax expense. The foregoing items, as well as
any other future changes in tax laws, could have a material adverse effect on our business, cash flow, financial condition, or results of operations. In
addition, it is uncertain if and to what extent various states will conform to the Tax Act or any newly enacted federal tax legislation.  

Item 1B. Unresolved Staff Comments

Not applicable.

Item 2. Properties

We currently lease approximately 34,988 square feet of office and laboratory space in South San Francisco, California under an eight-year lease

agreement that expires in June 2027.  Under the lease agreement we are given an option to extend the lease term for an additional period of 8 years, when
certain conditions are met.  We believe this space is sufficient to meet our needs for the foreseeable future and that any additional space we may require will
be available on commercially reasonable terms.

Item 3. Legal Proceedings

From time to time, we may become involved in legal proceedings arising in the ordinary course of our business. On January 3, 2019, Maverick

Therapeutics, Inc., or Maverick, filed a complaint against us in the Delaware Court of Chancery and a motion for a temporary restraining order seeking to
prohibit us from further developing our ProTriTAC platform. The complaint alleges various claims for breach of contract and misappropriation of trade
secrets, and seeks as relief, among other things, a declaration that our ProTriTAC technology impermissibly competes in the Maverick Field (as defined in
our Asset Transfer Agreement with Maverick), a preliminary and permanent injunction and unspecified damages. On January 18, 2019, the Court denied
Maverick’s motion for a temporary restraining order. We believe that the mechanism of action employed by our ProTriTAC platform falls outside the
Maverick Field. On May 8, 2019, Millennium Pharmaceuticals, Inc., or Millennium, a wholly owned subsidiary of Takeda Pharmaceutical
Company Limited, was granted permission by the court to intervene in the litigation based on a proposed complaint.  Millennium and Maverick are parties
to a collaboration agreement and a warrant agreement, and Millennium’s proposed complaint alleges, in part, that we fraudulently induced Millennium to
enter into the agreements with Maverick.  Millennium seeks to assert various tort claims against us. A trial on Maverick and Millennium’s claims was held
on September 9-13 and 17, 2019. The parties have completed post-trial briefing and closing arguments and are awaiting a decision from the Court. We will
vigorously defend the claims asserted against us.

We are not currently a party to any other material legal proceedings. Regardless of outcome, litigation can have an adverse impact on us due to

defense and settlement costs, diversion of management resources, negative publicity, reputational harm and other factors.

Item 4. Mine Safety Disclosures

Not applicable.

69

 
 
 
Part II

Item 5. Market for the Registrant’s Common Equity, related stockholder matters and issuer purchases of equity securities

Market Information for Common Stock

Our common stock has been listed on The NASDAQ Global Select Market under the symbol “HARP” since February 8, 2019. Prior to that, there

was no public trading market for our common stock. The following table sets forth for the indicated periods the high and low intraday sales prices per share
for our common stock on The Nasdaq Global Select Market.

Year ended December 31, 2019
    First quarter (from February 8, 2019)
    Second quarter
    Third quarter
    Fourth quarter

Holders of Record

High

Low

$
$
$
$

17.85 
13.26 
17.50 
21.47 

 $
 $
 $
 $

9.07 
9.55 
10.67 
12.78 

As of February 29, 2020, there were approximately 33 stockholders of record of our common stock. The actual number of stockholders is greater
than this number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers and other
nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividend Policy

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all available funds and any future earnings to

support operations and to finance the growth and development of our business. We do not intend to declare or pay any cash dividends on our capital stock
in the foreseeable future. Any future determination to pay dividends will be made at the discretion of our board of directors, subject to applicable laws, and
will depend upon, among other factors, our results of operations, financial condition, contractual restrictions and capital requirements. Our future ability to
pay cash dividends on our capital stock may be limited by the terms of any future debt or preferred securities.

Recent Sales of Unregistered Securities

There were no sales of unregistered securities during the period covered by this Annual Report on Form 10-K.

Use of Proceeds from Registered Securities

On February 7, 2019, our Registration Statement on Form S-1 (File No. 333-229040) relating to the initial public offering of our common stock was
declared effective by the SEC. Pursuant to such Registration Statement, we sold an aggregate of 5,769,201 shares of our common stock at a price of $14.00
per share for aggregate cash proceeds of approximately $70.7 million, net of underwriting discounts and commissions and offering costs, which includes
the partial exercise by the underwriters of their option to purchase additional shares.

There has been no material change in the expected use of the net proceeds from our initial public offering, as described in our final prospectus filed

with the SEC on February 8, 2019 pursuant to Rule 424(b) under the Securities Act of 1933, as amended.

Registrant Purchases of Equity Securities

None.

70

 
 
 
 
 
 
 
 
 
  
  
  
 
 
 
 
 
 
 
  
  
 
 
Item 6. Selected Financial Data.

We have derived the following selected statements of operations data for the years ended December 31, 2019, 2018 and 2017 and the selected

balance sheet data as of December 31, 2019 and 2018 from our audited financial statements included elsewhere in this report.

Our historical results are not necessarily indicative of the results that may be expected in any future period. You should read this data together with
the information under “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our financial statements and
related notes included elsewhere in this report.

Statement of operations data:
Revenue
Collaboration and license revenue

Total revenue
Operating expenses

Research and development
General and administrative
Total operating expenses

Loss from operations
Interest income
Interest expense
Other expense
Net loss
Net loss per share, basic and diluted(1)
Weighted-average shares used in computing net loss per share, basic and
   diluted (1)

2019

Year Ended December 31,
2018
(in thousands, except per share numbers)

2017

  $

 $

5,777 
5,777   

 $

4,750 
4,750   

41,592 
22,391 
63,983 
(58,206)
2,676 
— 
(42)
(55,572)

(2.56)

 $

26,368 
6,106 
32,474 
(27,724)
395 
— 
(37)
(27,366)

(25.65)

 $

  $

708 
708 

13,622 
3,614 
17,236 
(16,528)
78 
(285)
(95)
(16,830)

(18.81)

21,746,461 

1,066,877 

894,901

(1)

See Notes 2 and 12 to our audited financial statements included elsewhere in this report for an explanation of the calculations of our basic and
diluted net loss per share and the weighted-average number of shares used in computing the per share amounts.

Balance sheet data:
Cash, cash equivalents, and marketable securities
Working capital(1)
Total assets
Convertible preferred stock
Accumulated deficit
Total stockholders' equity (deficit)

2019

As of December 31,
2018
(in thousands)

2017

  $

155,129    $
128,104   
176,604   
—   
(118,163)  
94,220   

89,493    $
78,275   
102,580   
129,577   
(62,591)  
(53,479)  

29,423 
22,731 
31,872 
39,841 
(35,225)
(26,943)

(1) We define working capital as current assets less current liabilities. See our audited financial statements and related notes included elsewhere in this

report for further details regarding our current assets and current liabilities.

71

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

You should read the following discussion and analysis of our financial condition and results of operations together with our financial statements and
related notes and other financial information included elsewhere in this Annual Report on Form 10-K. Some of the information contained in this discussion
and analysis or set forth elsewhere in this Annual Report, including information with respect to our plans and strategy for our business, includes forward-
looking statements that involve risks and uncertainties. See “Special Note Regarding Forward-Looking Statements” and “Risk Factors” for a discussion of
forward-looking  statements  and  important  factors  that  could  cause  actual  results  to  differ  materially  from  the  results  described  in  or  implied  by  the
forward-looking  statements.  In  addition,  the  section  of  this  Management’s  Discussion  and  Analysis  of  Financial  Condition  and  Results  of  Operations
generally discusses 2019 and 2018 items and year-to-year comparisons between 2019 and 2018. Discussions of 2017 items and year-to-year comparisons
between 2018 and 2017 that are not included in this Annual Report on Form 10-K can be found in “Management’s Discussion and Analysis of Financial
Condition and Results of Operations” in Part II Item 7 of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018, filed
with the SEC on March 14, 2019.

Overview

We are a clinical-stage immunotherapy company developing a novel class of T cell engagers that harness the power of the body’s immune system to

treat patients suffering from cancer and other diseases. T cell engagers are engineered proteins that direct a patient’s own T cells to kill target cells that
express specific proteins, or antigens, carried by the target cells. Using our proprietary TriTAC platform, we are developing a pipeline of novel T cell
engagers, or TriTACs, initially focused on the treatment of solid tumors and hematologic malignancies.

We currently have two TriTAC product candidates in clinical development. HPN424, is currently in a Phase 1 clinical trial for the treatment of

metastatic castration-resistant prostate cancer, or mCRPC. HPN536, is currently in a Phase 1/2a clinical trial for the treatment of ovarian cancer and other
mesothelin-, or MSLN-, expressing solid tumors. We also have two TriTAC product candidates in preclinical development, HPN217, targeting B-cell
maturation antigen, or BCMA, for the treatment of multiple myeloma and HPN328, targeting Delta-like ligand 3, or DLL3, for the treatment of small cell
lung cancer, or SCLC.

Pipeline Update

HPN424: Our lead product candidate is currently in the dose escalation portion of a Phase 1 clinical trial for the treatment of mCRPC. The dose
escalation phase is designed to determine the maximum tolerated dose and a recommended Phase 2 dose. Once a recommended Phase 2 dose is determined,
we will initiate the dose expansion phase. Consistent with the TriTAC mechanism of action, we observed adverse events associated with T cell activation
and cytokine induction, which prompted us to explore the use of dexamethasone as a premedication to limit potential adverse events. We have found that
the addition of weekly dexamethasone premedication, tapered over several weeks, has successfully limited adverse events. Several patients have completed
the scheduled taper and have successfully continued treatment with HPN424 in the absence of dexamethasone, with no complications observed thus far.
Enrollment is ongoing in the dose-escalation phase of the trial. Pharmacokinetics observed to date continue to support once-weekly dosing of HPN424.  We
expect to present interim dose-escalation data at ASCO at the end of May 2020 and to initiate an expansion cohort in 2020.

HPN536: In April 2019, we advanced our second TriTAC, HPN536, a MSLN-targeting T cell engager, into the clinic and dosed the first patient in a

Phase 1/2a clinical trial for ovarian and other MSLN-expressing solid tumors. Patient enrollment continues as planned in the dose-escalation phase of the
trial. The study consists of two phases, an initial dose escalation phase of approximately 20 ovarian and pancreatic cancer patients, followed by an
expansion phase of up to three additional parallel cohorts of 20 patients each with ovarian, pancreatic and mesothelioma cancer. The study is collecting data
to evaluate the safety, tolerability, pharmacokinetics and activity of HPN536. We expect to present interim data from the trial in the second half of 2020.

HPN217: In November 2019 we submitted an IND to the FDA, for the treatment of multiple myeloma, as well as entered into a Development and

Option Agreement with AbbVie.  Under our agreement with AbbVie, we have already received an upfront payment of $30 million and anticipate receiving
a cash milestone payment of up to $50 million upon dosing the first patient in the Phase 1/2 clinical trial for HPN217 within a specified time period, which
we expect to occur in the first half of 2020.  Additionally, we are eligible to receive future payments totaling up to $430 million upon AbbVie’s exercise of
an exclusive license option and achievement of certain development, regulatory, and commercial milestones, in addition to receipt of royalties on
commercial sales. We are responsible for conducting the Phase 1/2 clinical trial of HPN217 under our agreement with AbbVie.

HPN328: We are developing HPN328, which targets DLL3, to initially treat SCLC. We plan to file an IND for HPN328 by mid-year 2020 and to
initiate a Phase 1/2a clinical trial in the second half of 2020. In October 2019, we presented data on HPN328 for the treatment of small cell lung cancer at
the AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics. HPN328 was well-tolerated in cynomolgus monkeys at 1
and 10 mg/kg and pharmacokinetic data support the potential for once weekly dosing.

72

 
Since commencing operations in 2015, we have devoted substantially all of our resources to performing research and development and

manufacturing activities in support of our product development efforts, hiring personnel, raising capital to support and expand such activities and providing
general and administrative support for these operations. We do not have any products approved for sale and have not generated any revenue from product
sales. We have funded our operations to date primarily from the issuance of convertible notes, the sale of convertible preferred stock, the sale of common
stock, payments received under our discovery collaboration agreement with AbbVie, and most recently the initial public offering, or IPO, of our common
stock on the NASDAQ Global Select Market, or Nasdaq.

Since our inception, we have incurred significant operating losses. Our ability to generate product revenue sufficient to achieve profitability will
depend heavily on the successful development and eventual commercialization of one or more of our current or future product candidates and programs.
Our net losses were $55.6 million, 27.4 million, and $16.8 million for the years ended December 31, 2019, 2018, and 2017, respectively. As of December
31, 2019, we had an accumulated deficit of $118.2 million. Our primary use of cash is to fund operating expenses, which consist primarily of research and
development expenditures, and to a lesser extent, general and administrative expenditures. We expect to continue to incur net losses for the foreseeable
future, and we expect our research and development expenses, general and administrative expenses, and capital expenditures will continue to increase.

We expect to continue to incur significant expenses and increasing operating losses for at least the next several years. Our net losses may fluctuate
significantly from period to period, depending on the timing of our planned clinical trials and expenditures on other research and development activities.
We expect our expenses will increase substantially over time as we:

•

•

•

•

•

•

•

•

continue the research and development of HPN424, HPN536, and HPN217, as well as our other product candidates;

initiate preclinical studies and clinical trials for any additional product candidates that we may pursue in the future;

seek marketing approvals for product candidates that successfully complete clinical trials;

establish a sales, marketing, manufacturing and distribution infrastructure to commercialize any product candidate for which we may obtain
marketing approval;

continue to invest in our technology platforms, including TriTAC and ProTriTAC;

maintain, protect and expand our portfolio of intellectual property rights, including patents, trade secrets and know-how;

implement operational, financial and management systems; and

attract, hire and retain additional administrative, clinical, regulatory and scientific personnel.

Furthermore, we expect to incur additional costs associated with operating as a public company, including significant legal, accounting, investor

relations and other expenses that we did not incur as a private company.

In early 2019, we closed the IPO of our common stock, in which we issued and sold an aggregate of 5,769,201 shares of common stock at a price of
$14.00 per share for net proceeds of approximately $70.7 million (inclusive of a partial exercise of the underwriters’ option), after deducting underwriting
discounts, commissions and offering expenses.

Collaborations with AbbVie

Development and Option Agreement

On November 20, 2019, we entered into a Development and Option Agreement Development and Option Agreementwith AbbVie in connection
with  our  HPN217  program,  which  targets  B  cell  maturation  antigen,  or  BCMA.  Pursuant  to  such  agreement,  we  granted  to  AbbVie  an  option  to  a
worldwide,  exclusive  license  to  our  patents  and  know-how  applicable  to  the  HPN217  program  to  develop,  manufacture,  and  commercialize  products
arising  from  the  HPN217  program  and  targeting  BCMA,  or  HPN217  Products.  Under  the  Development  and  Option  Agreement,  we  filed  an  IND  for
HPN217, and will conduct clinical development activities pursuant to a mutually agreed upon development plan, including conducting a Phase 1/2 clinical
trial of HPN217, in order for AbbVie to determine whether it wishes to exercise its option to a worldwide, exclusive license to such HPN217 program. We
plan to initiate a Phase 1/2 clinical trial in the first half of 2020.

Under  the  Development  and  Option  Agreement,  AbbVie  may  exercise  its  license  option  at  any  time  during  a  period  commencing  on  the
effective date of the agreement and expiring after a specified period following delivery by us of a specified data package arising from the first Phase 1/2
trial  for  the  HPN217  Product.  Following  AbbVie’s  exercise  of  its  option,  and  except  for  completion  of  certain  development  activities  by  us  under  the
development plan, AbbVie will be solely responsible, at its cost, for the development, manufacture and commercialization of HPN217 Products. AbbVie is
required to use commercially reasonable efforts to develop and obtain regulatory approval for one HPN217 Product, for at least one indication, for use in
each Major Market (as defined in the Development and Option Agreement).

73

 
 
 
 
 
 
 
 
 
 
AbbVie paid an upfront payment of $30.0 million and we expect to receive a development milestone payment of up to $50.0 million upon
dosing the first patient in the Phase 1/2 clinical trial within a specified time period, which we expect to occur in the first half of 2020. If AbbVie exercises
its option, AbbVie will pay us an option exercise fee of $200 million.  Following option exercise, AbbVie will be required to make further payments to us
of up to $230 million in the aggregate for the achievement of specified development, regulatory and commercial sales milestones for HPN217 Products. We
will  also  receive  tiered  royalties  on  net  sales  by  AbbVie,  its  affiliates  and  sublicensees  of  HPN217  Products  at  percentages  ranging  from  the  high
single  digits  to  the  very  low  double  digits,  subject  to  specified  offsets  and  reductions.  Royalties  will  be  payable  under  the  Development  and  Option
Agreement on a product-by-product and country-by-country basis commencing on the date of first commercial sale of each HPN217 Product, and ending
on the later of expiration of all valid claims of specified licensed patents in such country, expiration of regulatory exclusivity in such country, or ten years
following first commercial sale of such HPN217 Product in such country.

We will recognize revenue under the Development and Option Agreement as the initial development activities are performed using an input method,
according to the costs incurred as related to the estimated costs for the development and regulatory activities to be performed through the completion of a
Phase 1/2 clinical trial of HPN217. Accordingly, of the $30.0 million upfront payment received in 2019, $1.7 million of revenue was recognized for the
year ended 2019 and as of December 31, 2019, we had $29.3 million of deferred revenue under the Development and Option Agreement.

Amended and Restated Discovery Collaboration Agreement

On November 20, 2019, we entered into an Amended and Restated Discovery Collaboration and License Agreement, or the Restated Collaboration
Agreement, with AbbVie, which agreement amends and restates the Discovery Collaboration and License Agreement entered into between us and AbbVie,
dated October 10, 2017 and amended April 3, 2019, or the Original Collaboration Agreement.  Pursuant to the Original Collaboration Agreement, we
granted to AbbVie worldwide exclusive rights to develop and commercialize products that incorporate our proprietary TriTAC technology together with
soluble TCRs provided by AbbVie that bind to targets accepted by the parties. Under the terms of the Original Collaboration Agreement, AbbVie was
allowed to designate up to two targets, which it selected in 2017 and 2019, respectively. Pursuant to the Restated Collaboration Agreement, the worldwide,
exclusive license granted to AbbVie under the Collaboration Agreement to develop and commercialize products that incorporate our proprietary Tri-
specific T-cell Activating Construct, or TriTAC, platform technology together with soluble T cell receptors, or TCRs, provided by AbbVie has been
expanded to cover products that incorporate antibodies provided by AbbVie or by us. The expansion of the collaboration also allows AbbVie to designate
up to six additional targets, selected during a specified period following the effective date, to be the subject of activities under the collaboration. During a
period of up to four years following the date of AbbVie’s designation of each target for the products, and confirmation of target availability, we and AbbVie
will conduct certain research and discovery activities under a mutually agreed discovery and research plan in connection with the creation and evaluation of
constructs comprising our proprietary TriTAC technology, in conjunction with the soluble TCR or antibody sequences directed at the agreed upon targets of
interest. We may not, including through any third party, develop or commercialize any competing product that binds to any of the included targets. As was
the case under the Original Collaboration Agreement, following the discovery phase, AbbVie will be solely responsible, at its cost, for the development,
manufacture and commercialization of the products that arise from the activities under the discovery plan. AbbVie is required to use commercially
reasonable efforts to develop and commercialize one such product directed to each target for which the discovery activities were completed in each Major
Market (as defined in the Restated Collaboration Agreement).

In addition to the upfront payment of $17 million already paid under the Original Collaboration Agreement, under the Restated Collaboration

Agreement, we received an upfront payment of $20 million for AbbVie’s right to select two additional targets and an option to select up to four further
targets. AbbVie will be required to make payments to us, upon target selection, of $10 million for each target, up to four further targets selected by AbbVie.
For each of the up to eight targets selected, we will receive up to $300 million in the aggregate for the achievement of specified development, regulatory
and commercial sales milestones for licensed products indicated for human therapeutic or prophylactic use, totaling up to $2.4 billion in the aggregate, if
such licensed products are successfully progressed against all-included targets and indications. We will also be eligible to receive tiered royalties on net
sales by AbbVie, its affiliates and sublicensees of licensed products at percentages in the mid-single digits, subject to specified offsets and reductions.
Royalties will be payable under the Restated Collaboration Agreement on a product-by-product and country-by-country basis commencing on the date of
first commercial sale of each product, and ending on the later of expiration of all valid claims of specified licensed patents in such country, expiration of
regulatory exclusivity in such country or ten years following first commercial sale of such product in such country.  If licensed products are developed and
commercialized for diagnostic or veterinary use, or certain screening or monitoring uses, the parties have agreed to negotiate an appropriate reduction in the
economic terms applicable to such non-therapeutic and prophylactic applications.

We  recognized  revenue  under  the  Original  Collaboration  Agreement  over  a  period  in  which  related  research  and  development  activities  occur.
Accordingly, of the $17.0 million upfront payment received in 2017, $4.0 million and $4.3 million of revenue was recognized during the years ended 2019
and 2018, respectively, and, as of December 31, 2019, we had $8.0 million of deferred revenue under the Original Collaboration Agreement.

74

 
We will recognize revenue under the Restated Collaboration Agreement over a period in which related research and development activities occur.
Accordingly, of the $20.0 million upfront payment received in 2019, no revenue was recognized for the year ended 2019 and as of December 31, 2019, we
had $20.0 million of deferred revenue under the Restated Collaboration Agreement.

The  Restated  Collaboration  Agreement  will  terminate  upon  the  date  of  the  expiration  of  all  AbbVie’s  royalty  payment  obligations  in  all
countries.   The  Restated  Collaboration  Agreement  may  be  terminated  by  either  party  immediately  for  the  insolvency  of  the  other  party  or  on  90  days’
written notice for an uncured material breach of such agreement by the other party.  AbbVie may also terminate the Restated Collaboration Agreement in its
entirety or on a target-by-target or country-by-country basis for any reason on 30 days’ written notice to the Company. In addition, AbbVie may terminate
the  Restated  Collaboration  Agreement  immediately  in  its  entirety  or  on  a  target-by-target  basis  if  AbbVie  considers  in  good  faith  that  there  has  been  a
failure of the discovery or development efforts with respect to such target, or that further development or commercialization of products directed to such
target is not advisable as a result of a serious safety issue.

License Agreement with Werewolf Therapeutics, Inc.

In March 2018, we entered into an assignment and license agreement, or the Werewolf Agreement, with Werewolf Therapeutics, Inc., or Werewolf,
a portfolio company of MPM Capital, Inc., a holder of more than 5% of our capital stock. Dr. Luke Evnin, a member of our Board, is the Chairman of the
board of directors of Werewolf. Under the Werewolf Agreement, we assigned certain patents that relate to certain inducible polypeptides (and binding
moiety for conditional activation of certain polypeptides) to Werewolf and granted to Werewolf a non-exclusive, royalty-bearing, sublicenseable license
under certain other patents owned by us and relating to certain proteins, to make, use and commercialize products that are covered by such patents in the
field of molecules comprising a certain polypeptide. Werewolf assigned certain patents to us relating to adoptive cell therapies and binding moieties for
conditional activation of immunoglobulin and non-immunoglobulin molecules. Under the Werewolf Agreement, Werewolf paid us an upfront fee of $0.5
million. If Werewolf commercializes products covered by the licensed patents, then beginning on the first sale of such products, Werewolf will be obligated
to pay to us a royalty on net sales of such products by Werewolf, its affiliates and licensees at a percentage in the low single digits, subject to an obligation
to make a minimum annual royalty payment at an amount in the low hundreds of thousands of dollars.

In December 2019, we and Werewolf amended the Werewolf Agreement by entering into a Second Amended and Restated Assignment and License

Agreement, or the Amended Werewolf Agreement, to include the grant to Werewolf of an exclusive, royalty-bearing, sublicensable license under certain
patents owned by us and relating to certain proteins, to make, use, and commercialize products that are covered by such patents in the field of molecules
comprising a certain protein. If Werewolf commercializes products covered by these licensed patents, then beginning on the first sale of such products,
Werewolf will be obligated to pay to us a royalty on net sales of such products by Werewolf, its affiliates and licensees at a percentage in the low single
digits, and this royalty cannot be added to any other royalty owed to us under the Amended Werewolf Agreement.  In addition, each party granted to the
other a non-exclusive, royalty-free, sublicensable, perpetual license under certain other patents relating to a certain binding domain of a certain protein, to
make, use and commercialize products that are covered by such patents in a field defined by a certain type of molecule for each party. 

Royalties on net sales will be recognized when the underlying sales occur. No royalty revenue was recognized under the Werewolf Agreement as of

December 31, 2019.

75

 
Financial Operations Overview

Revenue

We have no products approved for commercial sale and have not generated any revenue from product sales. Our collaboration and license revenue to

date is related to work performed by us under the Restated Collaboration Agreement and Development and Option Agreement, and is recognized when
designated research and development services are performed. To date, we have not received any milestone or royalty payments under the Original
Collaboration Agreement or the Restated Collaboration Agreement. We expect that any collaboration and license revenue we generate from the Restated
Collaboration Agreement and the Development and Option Agreement and any future collaboration partners will fluctuate from period to period as a result
of the timing and amount of milestones and other payments. Additionally, for R&D services that we recognize over time, we measure our progress using an
input method. The input methods we use are based on the effort we expend or costs we incur toward the satisfaction of our performance obligation. We
estimate the amount of effort we expend, including the time we estimate it will take us to complete the activities, or costs we incur in a given period,
relative to the estimated total effort or costs to satisfy the performance obligation. This results in a percentage that we multiply by the transaction price to
determine the amount of revenue we recognize each period. This approach requires us to make numerous estimates and use significant judgement. If our
estimates or judgements change over the course of the collaboration, they may affect the timing and amount of revenue that we recognize in the current and
future periods. On January 1, 2017, we adopted on a full retrospective basis Accounting Standards Codification Topic 606, Revenue from Contracts with
Customers, or Topic 606. See further discussion under “Critical Accounting Policies and Estimates – Revenue Recognition.”

Operating Expenses

Research and Development

Research and development expenses represent costs incurred in performing research, development and manufacturing activities in support of our
own product development efforts and those of our collaborators, and include salaries, employee benefits, stock-based compensation, laboratory supplies,
outsourced research and development expenses, professional services and allocated facilities-related costs. We expense both internal and external research
and development expenses as they are incurred. We do not allocate our costs by product candidates, as our research and development expenses include
internal costs, such as payroll and other personnel expenses, and external costs, neither of which are tracked by product candidate. In particular, with
respect to internal costs, several of our departments support multiple product candidate research and development programs. Non-refundable advance
payments for services that will be used or rendered for future research and development activities are recorded as prepaid expenses and recognized as
expenses as the related services are performed.

We expect our research and development expenses to continue to increase substantially in absolute dollars for the foreseeable future as we advance

our product candidates into and through preclinical studies and clinical trials, pursue regulatory approval of our product candidates and expand our pipeline
of product candidates. The process of conducting the necessary preclinical and clinical research to obtain regulatory approval is costly and time consuming.
The actual probability of success for our product candidates may be affected by a variety of factors, including the safety and efficacy of our product
candidates, early clinical data, investment in our clinical programs, the ability of collaborators to successfully develop our licensed product candidates,
competition, manufacturing capability and commercial viability. We may never succeed in achieving regulatory approval for any of our product candidates.
As a result of the uncertainties discussed above, we are unable to determine the duration and completion costs of our research and development projects or
when and to what extent we will generate revenue from the commercialization and sale of our product candidates.

General and Administrative

Our general and administrative expenses consist primarily of personnel costs, allocated facilities costs and other expenses for outside professional
services, including legal, human resource, audit and accounting services. Personnel costs consist of salaries, benefits and stock-based compensation. We
expect to incur additional expenses as a result of operating as a public company, including expenses related to compliance with the rules and regulations of
the Securities and Exchange Commission, or the SEC, Nasdaq and any other securities exchange on which our securities are traded, additional insurance
expenses, investor relations activities and other administrative and professional services. We also expect to increase the size of our administrative function
to support the growth of our business.

Other Expense

Other expense is primarily comprised of foreign currency transaction losses related to certain transactions with European third-party vendors.

76

 
Results of Operations

Comparison of Years Ended December 31, 2019 and 2018

Revenue:

Collaboration and license revenue

Total revenue
Operating expenses:

Research and development
General and administrative
Total operating expenses

Loss from operations
Interest income
Other expense
Net loss

*

Not meaningful

Revenue

Year Ended December 31,
2018
2019
(dollars in thousands)

Change ($)

Change (%)

  $

5,777    $
5,777   

4,750    $
4,750   

41,592   
22,391   
63,983   
(58,206)  
2,676   
(42)  
(55,572)   $

26,368   
6,106   
32,474   
(27,724)  
395   
(37)  
(27,366)   $

  $

1,027   
1,027   

15,224   
16,285   
31,509   
30,482   
2,281   
5   
28,206   

22%
22%

58%
267%
97%
110%
578%
-14%
103%

Collaboration and license revenue of $5.8 million for the year ended December 31, 2019 consisted of revenue recognized related to research and

development services performed under the Restated Collaboration Agreement of $4.0 million and the Development and Option Agreement of $1.7 million.
Collaboration and license revenue of $4.8 million for the year ended December 31, 2018 primarily consisted of revenue recognized related to research and
development services performed under the Restated Collaboration Agreement of $4.3 million and $0.5 million of the upfront payment received by us in
May 2018 under the Werewolf Agreement.

Research and Development

The following table summarizes our research and development expenses incurred during the respective periods:

Product and clinical development
Research and technology services
Laboratory supplies and equipment
Pharmacology services
Personnel-related
Facility and other allocated expenses
Consulting
Total research and development expenses

Year Ended December 31,

2019

2018

(In thousands)

$

$

17,208    $
2,747   
2,226   
1,303   
8,728   
6,412   
2,968   
41,592    $

8,504 
3,401 
1,828 
1,054 
5,830 
3,366 
2,385 
26,368

Research and development expenses increased by $15.2 million, or 58%, in 2019 compared to 2018. The increase was primarily due to a $8.9
million increase in product and clinical development expense and pharmacology services due to development of four identified product candidates, which
includes conducting preclinical and clinical studies and manufacturing runs to support ongoing clinical development, a $3.0 million increase in facility and
other allocated expenses primarily related to a lease agreement for the office and laboratory space in South San Francisco, California, or the Cove Lease,
entered into in August 2018, a $2.9 million increase in personnel-related expenses due to an increase in headcount, a $0.6 million increase in consulting
expenses primarily due to preparation of our HPN424, HPN536 and HPN217 clinical trials, a $0.4 million increase in laboratory supplies and equipment to
support increased activity related to all of our product candidates, which was offset by a $0.6 million decrease in research and technology services due to
the completion of certain research activities as our lead product candidates transitioned into clinical development.  

77

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
    
 
  
 
 
 
 
 
 
 
 
    
 
    
 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
   
 
   
 
   
 
 
 
 
General and Administrative

General and administrative expenses increased by $16.3 million, or 267%, in 2019 compared to 2018. The increase was primarily due to a $11.0
million increase in legal fees primarily associated with ongoing litigation with Maverick Therapeutics, Inc., a $2.7 million increase in personnel-related
expenses due to an increase in headcount, a $1.6 million increase in other professional services to support our ongoing operations as a public company, a
$0.8 million increase in facility and other allocated expenses primarily related to the Cove Lease, and a net $0.2 million increase consulting and accounting
services related to quarterly reviews and year-end audits associated with preparations for our initial public offering.

Interest Income

Interest income increased by $2.3 million, or 579%, in 2019 compared to 2018. The increase was primarily due to an increase in interest earned on

our cash deposit accounts and marketable securities during the year ended December 31, 2019.

Other Expense

Other expense did not significantly fluctuate period over period.

Liquidity and Capital Resources

Liquidity

Since our inception and through December 31, 2019, we have financed our operations primarily through the issuance of convertible notes, the sale

of convertible preferred stock, the sale of common stock, upfront payments received by us from our collaboration and license agreements and the initial
public offering of our common stock on the Nasdaq, including the partial exercise of the underwriters’ option to purchase additional shares, in which we
received an aggregate of approximately $70.7 million in net proceeds, which amount is net of $10.1 million in underwriters’ discount and offering costs. As
of December 31, 2019, we had $155.1 million in cash and cash equivalents and marketable securities, an accumulated deficit of $118.2 million and
working capital of $128.1 million. We expect to continue to incur substantial costs in order to conduct research and development activities necessary to
develop and commercialize our product candidates. Additional capital will be needed to undertake these activities and commercialization efforts, and,
therefore, we intend to raise such capital through the issuance of additional equity, borrowings, and potentially strategic alliances with other companies.
However, if such financing is not available at adequate levels or on acceptable terms, we could be required to significantly reduce operating expenses and
delay, reduce the scope of or eliminate some of the development programs or commercialization efforts, out-license intellectual property rights to our
product candidates and sell unsecured assets, or a combination of the above, any of which may have a material adverse effect on the our business, results of
operations, financial condition and/or out ability to fund our scheduled obligations on a timely basis or at all.    

Capital Resources

Our primary uses of cash are to fund operating expenses, which consist primarily of funding our clinical and preclinical trials, research and
development expenditures and related personnel costs. Cash used to fund operating expenses is impacted by the timing of when we pay these expenses, as
reflected in the change in our outstanding accounts payable and accrued expenses. The timing and amount of our future funding requirements depends on
many factors, including the following:

•

•

•

•

•

•

•

•

•

the scope, rate of progress, results and cost of our preclinical studies, clinical trials and other related activities;

the cost of manufacturing clinical supplies, and establishing commercial supplies, of our product candidates and any products that we may
develop;

the number and characteristics of product candidates that we pursue;

the cost, timing and outcomes of regulatory approvals;

the cost and timing of establishing sales, marketing and distribution capabilities;

the terms and timing of any other collaborative, licensing and other arrangements that we may establish;

the timing, receipt and amount of sales, profit sharing or royalties, if any, from our potential products;

the cost of preparing, filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights

the extent to which we acquire or invest in businesses, products or technologies, although we currently have no commitments or agreements
relating to any of these types of transactions;

78

 
 
 
 
 
 
 
 
 
 
 
 
•

•

the compliance and administrative costs associated with being a public company; and

the cost of attracting, hiring and retaining additional administrative, clinical, regulatory and scientific personnel.

Based on our current business plans, we believe that our existing cash, cash equivalents and marketable securities, which include the net proceeds
generated from our IPO in February 2019, will be sufficient to fund our planned operations for at least the next 12 months from the issuance date of this
Annual Report Form 10-K. However, we will require additional funding in order to complete development of our product candidates and commercialize
our products, if approved. We may seek to raise any necessary additional capital through a combination of public or private equity offerings, debt
financings, collaborations, strategic alliances, licensing arrangements and other marketing and distribution arrangements. There can be no assurance that we
will be successful in acquiring additional funding at levels sufficient to fund our operations or on terms favorable to us. If we are unable to obtain adequate
financing when needed, we may have to delay, reduce the scope of or suspend one or more of our preclinical studies and clinical trials, research and
development programs or commercialization efforts. Because of the numerous risks and uncertainties associated with the development and
commercialization of our product candidates and the extent to which we may enter into additional collaborations with third parties to participate in their
development and commercialization, we are unable to estimate the amounts of increased capital outlays and operating expenditures associated with our
current and anticipated preclinical studies and clinical trials. To the extent that we raise additional capital through additional collaborations, strategic
alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our product candidates, future revenue streams, research
programs or product candidates or to grant licenses on terms that may not be favorable to us. If we do raise additional capital through public or private
equity or convertible debt offerings, the ownership interest of our existing stockholders will be diluted, and the terms of these securities may include
liquidation or other preferences that adversely affect our stockholders’ rights. If we raise additional capital through debt financing, we may be subject to
covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends.

Please see the section entitled “Risk Factors” for additional risks associated with our substantial capital requirements and the challenges we may

face in raising capital.

Cash Flows

Net cash (used in) provided by:

Operating activities
Investing activities
Financing activities

Net increase (decrease) in cash, cash equivalents, and restricted cash

Cash Flows from Operating Activities

Year Ended December 31,

2019

2018

(In thousands)

  $

$

(2,891)   $
(69,315)  
71,449   

(757)   $

(27,126)
(663)
88,326 
60,537

In 2019, cash used in operating activities was $2.9 million, which consisted of a net loss of $55.6 million and a net change of $49.0 million in our

net operating assets and liabilities, partially offset by $3.6 million in non-cash charges. The non-cash charges consisted of stock-based compensation of
$2.1 million, depreciation and amortization of $0.9 million, amortization operating right-of-use lease asset of $1.2 million and net amortization of
premiums and discounts on marketable securities of $0.5 million. The change in operating assets and liabilities was primarily due to an increase in deferred
revenue of $45.3 million resulting from the upfront payments of $30 million from the Development and Option Agreement and $20 million from the
Restated Collaboration Agreement, a net increase in accounts payable and accrued liabilities of $2.5 million related to legal fees associated with Maverick
litigation and timing of research and development activities, an increase in prepaid expenses and other current assets of $1.8 million resulting from the
timing of payments made for operating costs to support our operations as a public company and timing for ongoing research and development activities and
a decrease in other assets of $3.0 million resulting from the recognition of deferred IPO costs.

In 2018, cash used in operating activities was $27.1 million, which consisted of a net loss of $27.4 million and a net change of $1.1 million in our

net operating assets and liabilities, partially offset by $1.3 million in non-cash charges. The non-cash charges consisted of stock-based compensation of
$0.7 million and depreciation and amortization of $0.6 million. The change in operating assets and liabilities was primarily due to a decrease in deferred
revenue of $4.3 million resulting from the recognition of collaboration revenue, an increase in accounts payable and accrued liabilities of $3.6 million, and
an increase in prepaid expenses and other current assets of $0.5 million resulting from the timing of payments made for research and development
activities.

79

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
  
   
 
   
 
 
 
 
Cash Flows from Investing Activities

In 2019, cash used in investing activities of $69.3 million primarily related to purchases of marketable securities and property and equipment

consisting primarily of laboratory equipment offset by the maturity and sale of marketable securities.

In 2018, cash used in investing activities of $0.7 million related to purchases of property and equipment consisting primarily of laboratory

equipment.

Cash Flows from Financing Activities

In 2019, cash provided by financing activities of $71.4 million was primarily related to the proceeds received from our IPO in February 2019.

In 2018, cash provided by financing activities of $88.3 million was related primarily to $69.8 million in net cash proceeds received from the
November 2018 issuance of our Series C convertible preferred stock, $20.0 million in net cash proceeds received from the July 2018 issuance of our Series
B convertible preferred stock as a result of our IND filing for HPN424, and $0.2 million in proceeds from the issuance of common stock upon the exercise
of stock options, partially offset by $1.7 million in deferred offering costs related to our initial public offering.

Contractual Obligations and Other Commitments

The following table summarizes our contractual obligations as of December 31, 2019:

Operating lease obligations
Total

Less than
1 year

1 to 3
years

Payments due by period
4 to 5
years
(In thousands)

  After 5 years  

Total

  $
  $

2,487    $
2,487    $

7,943    $
7,943    $

2,818 
2,818 

 $
 $

7,433    $
7,433    $

20,681 
20,681

The obligations noted above represent operating lease obligations related to our currently occupied premises at 131 Oyster Point Blvd in South San
Francisco, California that commenced in July 2019 and expires in June 2027. The initial annual base rent is approximately $2.2 million, and such amount
will increase by 3.5% annually on each anniversary of the commencement date, equaling approximately $20.0 million over the eight-year lease term. In
connection with the lease, we will maintain a letter of credit for the benefit of the landlord in the amount of $0.5 million. Under the lease agreement, we
have an option to extend the lease for an additional period of eight years.  As of December 31, 2019, we have not determined whether we will exercise our
option to extend the lease term.  

In December 2016, we entered into a royalty transfer agreement with MPM Oncology Charitable Foundation, Inc. and UBS Optimus Foundation

pursuant to which we will pay 0.5% of our annual global net sales to each of the counterparties for products that incorporate or utilize intellectual property
that was discovered or developed by us prior to our initial public offering.

In October 2015, we entered into a collaboration and license agreement with AGC Biologics, Inc. (formerly known as CMC ICOS Biologics, Inc.),
or AGC, for certain manufacturing-related technology, and in July 2016, we entered into a development and manufacturing agreement with AGC. Pursuant
to these agreements, so long as AGC is our exclusive manufacturer, we will not owe AGC any milestone or royalty payments for the use of their
manufacturing technology. However, if AGC is no longer our exclusive manufacturer, and we still use such technology, we will owe AGC specified
milestones of up to $350,000 per specified product and a royalty on net sales of these products of less than 1%. We have an option to buy out these royalty
obligations by making a one-time payment to AGC in a dollar amount in the mid-single digit millions. See “Business—Collaboration and License
Agreements—Agreements with AGC Biologics, Inc.”

In addition, we enter into agreements in the normal course of business with contract research organizations for clinical trials and with vendors for

preclinical studies and other services and products for operating purposes, which are generally cancelable upon written notice. These payments are not
included in this table of contractual obligations.

Off-Balance Sheet Arrangements

Since our inception, we have not engaged in any off-balance sheet arrangements, as defined in the rules and regulations of the SEC.

80

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Critical Accounting Polices and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been

prepared in accordance with GAAP. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported
amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported revenue
generated, and reported expenses incurred during the reporting periods. Our estimates are based on our historical experience and on various other factors
that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and
liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

While our significant accounting policies are described in the notes to our financial statements included elsewhere in this Annual Report on Form

10-K, we believe that the following critical accounting policies are most important to understanding and evaluating our reported financial results.

Revenue Recognition

Effective January 1, 2017, we early adopted on a full retrospective basis Accounting Standards Codification Topic 606, Revenue from Contracts

with Customers, or Topic 606. This standard applies to all contracts with customers, except for contracts that are within the scope of other standards, such
as leases, insurance, collaboration arrangements and financial instruments. In accordance with ASC 606, we recognize revenue when our customer obtains
control of promised goods or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services.

To determine revenue recognition for arrangements that we determine are within the scope of Topic 606, we perform the following five steps:

(i)
(ii)
(iii)
(iv)
(v)

identify the contract(s) with a customer;
identify the performance obligations in the contract;
determine the transaction price;
allocate the transaction price to the performance obligations in the contract; and
recognize revenue when or as we satisfy a performance obligation.

We only apply the five-step model to contracts when it is probable that we will collect the consideration we are entitled to in exchange for the goods

and services we transfer to the customer. At contract inception, we assess the goods or services promised within each contract that falls under the scope of
Topic 606, determine those that are performance obligations and assesses whether each promised good or service is distinct. We then recognize as revenue
the amount of the transaction price that is allocated to the respective performance obligation when or as the performance obligation is satisfied.

We allocate the transaction price to each performance obligation on a relative stand-alone selling price basis. The stand-alone selling price may be,

but is not presumed to be, the contract price. In determining the allocation, we maximize the use of observable inputs. When the stand-alone selling price of
a good or service is not directly observable, we estimate the stand-alone selling price for each performance obligation using assumptions that require
judgment. Acceptable estimation methods include, but are not limited to: (i) the adjusted market assessment approach, (ii) the expected cost plus margin
approach, and (iii) the residual approach (when the stand-alone selling price is not directly observable and is either highly variable or uncertain). In order
for the residual approach to be used, we must demonstrate that (a) there are observable stand-alone selling prices for one or more of the performance
obligations and (b) one of the two criteria in ASC 606-10- 32-34(c)(1) and (2) is met. The residual approach cannot be used if it would result in a stand-
alone selling price of zero for a performance obligation, as a performance obligation, by definition, has value on a stand-alone basis.

An option in a contract to acquire additional goods or services gives rise to a performance obligation only if the option provides a material right to

the customer that it would not receive without entering into that contract. Factors that we consider in evaluating whether an option represents a material
right include, but are not limited to: (i) the overall objective of the arrangement, (ii) the benefit the collaborator might obtain from the arrangement without
exercising the option, (iii) the cost to exercise the option (e.g. priced at a significant and incremental discount) and (iv) the likelihood that the option will be
exercised. With respect to options determined to be performance obligations, we recognize revenue when those future goods or services are transferred or
when the options expire.

81

 
 
 
 
 
 
We enter into corporate collaborations under which we may obtain upfront license fees, research and development funding, and development,

regulatory and commercial milestone payments and royalty payments. Our performance obligations under these arrangements may include licenses of
intellectual property, distribution rights, research and development services, delivery of manufactured product and/or participation on joint steering
committees.

•

•

•

Licenses of Intellectual Property. If the license to our intellectual property is determined to be distinct from the other performance obligations
identified in the arrangement, we recognize revenue from upfront fees allocated to the license when the license is transferred to the customer
and the customer is able to use and benefit from the license. For licenses that are bundled with other promises, we utilize judgement to assess
the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a
point in time and, if over time, the appropriate method of measuring proportional performance for purposes of recognizing revenue from non-
refundable, upfront fees. We evaluate the measure of proportional performance each reporting period and, if necessary, adjust the measure of
performance and related revenue recognition. We recognize collaboration revenue by measuring the progress toward complete satisfaction of
the performance obligation using an input measure. In order to recognize revenue over the research and development period, we measure
actual costs incurred to date compared to the overall total expected costs to satisfy the performance obligation. Revenues are recognized as
the program costs are incurred. We will re-evaluate the estimate of expected costs to satisfy the performance obligation each reporting period
and make adjustments for any significant changes.

Milestone Payments. At the inception of each arrangement that includes development, regulatory or commercial milestone payments, we
evaluate whether the milestones are considered probable of being reached and estimates the amount to be included in the transaction price.
Topic 606 suggests two alternatives to use when estimating the amount of variable consideration: the expected value method and the most
likely amount method. Under the expected value method, an entity considers the sum of probability-weighted amounts in a range of possible
consideration amounts. Under the most likely amount method, an entity considers the single most likely amount in a range of possible
consideration amounts. Whichever method is used, it should be consistently applied throughout the life of the contract; however, it is not
necessary for us to use the same approach for all contracts. We expect to use the most likely amount method for development and regulatory
milestone payments. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the
transaction price. Milestone payments that are not within our or the licensee’s control, such as regulatory approvals, are not considered
probable of being achieved until those approvals are received. The transaction price is then allocated to each performance obligation on a
relative stand-alone selling price basis. We recognize revenue as or when the performance obligations under the contract are satisfied. At the
end of each subsequent reporting period, we re-evaluate the probability or achievement of each such milestone and any related constraint, and
if necessary, adjust our estimates of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which
would affect revenues and earnings in the period of adjustment.

Commercial Milestones and Royalties. For arrangements that include sales-based royalties, including milestone payments based on the level
of sales, and in which the license is deemed to be the predominant item to which the royalties relate, we recognize revenue when the related
sales occur. To date, we have not recognized any royalty revenue resulting from our collaboration arrangements.

Upfront payments and fees are recorded as deferred revenue upon receipt or when due, and may require deferral of revenue recognition to a future

period until we perform our obligations under these arrangements. Amounts payable to us are recorded as accounts receivable when our right to
consideration is unconditional.

See Note 8, “Collaboration and License Agreements” for additional details regarding our collaboration arrangements with AbbVie.

Research and Development Expenses and Accrued Research and Development Costs

We expense research and development costs as incurred. Research and development expenses consist of personnel costs for our research and product

development employees. Also included are non-personnel costs such as professional fees payable to third parties for preclinical and preclinical studies,
clinical trials and research services, production of materials for clinical trials, laboratory supplies and equipment maintenance and depreciation, intellectual
property licenses and other consulting costs. We estimate preclinical and clinical study and research expenses based on the services performed, pursuant to
contracts with research institutions that conduct and manage preclinical studies, clinical trials and research services on our behalf. We estimate these
expenses based on discussions with management and external service providers as to the progress or stage of completion of services and the contracted fees
to be paid for such services. We record the estimated costs of research and development activities based upon the estimated amount services provided but
not yet invoiced, and include these costs in development expenses. We accrue for these costs based on factors such as estimates of the work completed and
in accordance with agreements established with our third-party service provides under the service agreements. We make significant judgments and
estimates in determining the accrued liabilities balance in each reporting period. As actual costs become known, we adjust our accrued liabilities. We have
not experienced any material differences between accrued costs and actual costs incurred. However, the status and timing of actual services performed may
vary from our estimates, resulting in adjustments to expense in future periods. Changes in these estimates that result in material changes to our accruals
could materially affect our results of operations. Payments associated with licensing agreements to acquire exclusive license to develop, use, manufacture
and commercialize products that have not reached technological feasibility and do not have alternate future use are expensed as incurred.

82

 
 
 
 
Payments made to third parties under these arrangements in advance of the performance of the related services by the third parties are recorded as

prepaid expenses until the services are rendered. Such payments are evaluated for current or long-term classification based on when such services are
expected to be received.

Stock-Based-Compensation

We maintain a stock-based compensation plan as a long-term incentive for employees, consultants and members of our board of directors. The plan

allows for the issuance of non-statutory options, or NSOs, and incentive stock options to employees and NSOs to nonemployees.

Share-based payments are measured using fair-value-based measurements and recognized as compensation expense over the service period in which

the awards are expected to vest. Our fair-value-based measurements of awards to employees and directors as of the grant date utilize the single-option
award-valuation approach, and we use the straight-line method for expense attribution. The valuation model used for calculating the estimated fair value of
stock awards is the Black-Scholes option-pricing model. The Black-Scholes model requires us to make assumptions and judgments about the variables used
in the calculations, including the expected term (weighted-average period of time that the options granted are expected to be outstanding), the expected
volatility of our common stock, the related risk-free interest rate and the expected dividend. We have elected to recognize forfeitures of share-based
payment awards as they occur.

Effective January 1, 2018, we early adopted ASU No. 2018-07, Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee
Share-Based Payment Accounting (“ASU 2018-07”). The new guidance requires equity-classified share-based payment awards issued to nonemployees to
be measured on the grant date, instead of being measured through the performance completion date under the pre-existing guidance. For stock-based
awards issued to non-employees, we record expense related to stock options based on the fair value of the options calculated using the Black-Scholes
option-pricing model based on the measured grant date.  For stock-based awards issued to non-employees prior to January 1, 2018, we recorded expense
related to stock options based on the fair value of the options calculated using the Black-Scholes option-pricing model, remeasured at each reporting period
until the options vest over the service performance period.

We estimate the fair value of stock options granted to our employees on the grant date, and rights to acquire stock granted under our Employee

Stock Purchase Plan ("ESPP"), and the resulting stock-based compensation expense, using the Black-Scholes option-pricing model.

The Black-Scholes option-pricing model requires the use of highly subjective assumptions which determine the fair value of stock-based awards.

These assumptions include:

•

•

•

•

Expected term. The expected term represents the period that stock-based awards are expected to be outstanding. The expected term for option
grants is determined using the simplified method. The simplified method deems the term to be the average of the time-to-vesting and the
contractual life of the stock-based awards.

Expected volatility. Since we have a limited trading history for our common stock, the expected volatility was estimated based on the average
volatility for comparable publicly traded biotechnology companies over a period equal to the expected term of the stock option grants. The
comparable companies were chosen based on their similar size, stage in the life cycle or area of specialty.

Risk-free interest rate. The risk-free interest rate is based on the U.S. Treasury zero coupon issues in effect at the time of grant for periods
corresponding with the expected term of option.

Expected dividend. We have never paid dividends on our common stock and have no plans to pay dividends on our common stock. Therefore,
we used an expected dividend yield of zero.

83

 
 
 
 
 
Fair Value of Common Stock

Prior to our IPO in February 2019, the fair values of the shares of common stock underlying our share-based awards were estimated on each grant
date by our board of directors. Given the absence of a public trading market for our common stock prior to our February 2019 IPO, our board of directors
exercised reasonable judgment and considered a number of objective and subjective factors to determine the best estimate of the fair value of our common
stock, including our stage of development; our actual operating results and financial performance; progress of our research and development efforts;
conditions in the industry and economy in general; the rights, preferences and privileges of our convertible preferred stock relative to those of our common
stock; the likelihood of achieving a liquidity event for the holders of our common stock, such as an initial public offering or a sale of our company, given
prevailing market conditions; equity market conditions affecting comparable public companies; the lack of marketability of our common stock and the
results of independent third-party valuations. Valuations of our common stock were prepared by an unrelated third-party valuation firm in accordance with
the guidance provided by the American Institute of Certified Public Accountants 2013 Practice Aid, Valuation of Privately-Held-Company Equity
Securities Issued as Compensation.

For our valuations performed prior to December 31, 2018, we used the Option Pricing Model (OPM) Backsolve method to estimate the fair value of

our common stock. In an option pricing method, or OPM, framework, the backsolve method for inferring the equity value implied by a recent financing
transaction involves making assumptions for the expected time to liquidity, volatility and risk-free rate and then solving for the value of equity such that
value for the most recent financing equals the amount paid. Furthermore, as of each of the valuation dates prior to December 31, 2018, we were at an early
stage of development and future liquidity events were difficult to forecast. We applied a discount for lack of marketability to account for a lack of access to
an active public market.

Subsequent to the completion of our IPO in February 2019, our board of directors determines the fair value of our common stock based on the

closing price of our common stock as reported on the date of grant on the primary stock exchange on which our common stock is traded.

Recent Accounting Pronouncements

See Note 2 to our financial statements included elsewhere in this report for more information.

Emerging Growth Company Status

We are an emerging growth company, as defined in the JOBS Act. Under the JOBS Act, emerging growth companies can delay adopting new or

revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies. We elected
to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private
companies until the earlier of the date that we (i) are no longer an emerging growth company or (ii) affirmatively and irrevocably opt out of the extended
transition period provided in the JOBS Act. As a result, these financial statements may not be comparable to companies that comply with the new or
revised accounting pronouncements as of public company effective dates. We early adopted ASU 2014-09, Revenue from Contracts with
Customers (Accounting Standards Codification Topic 606), ASU 2016-09, Stock Compensation—Improvements to Employee Share-Based Payment
Accounting, and ASU 2018-07, Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, ASU
No. 2016-02, (Topic 842), Leases, as the JOBS Act does not preclude an emerging growth company from early adopting a new or revised accounting
standard earlier than the time that such standard applies to private companies. We expect to use the extended transition period for any other new or revised
accounting standards during the period in which we remain an emerging growth company.

We will remain an emerging growth company until the earliest of (i) the last day of our first fiscal year (a) following the fifth anniversary of the

completion of our initial public offering, (b) in which we have total annual gross revenues of at least $1.07 billion or (c) in which we are deemed to be a
large accelerated filer, which means the market value of our common stock that is held by non-affiliates exceeds $700.0 million as of the prior June 30th
and (ii) the date on which we have issued more than $1.0 billion in non-convertible debt securities during the prior three-year period.

84

 
 
Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

Interest Rate Risk

Market risk represents the risk of loss that may impact our financial position due to adverse changes in financial market prices and rates. We are

exposed to market risks in the ordinary course of our business. Our market risk exposure is primarily the result of fluctuations that may cause the market
value of these assets to fluctuate. We are exposed to market risk related to changes in interest rates. We had cash, cash equivalents and marketable securities
of $155.1 million as of December 31, 2019, which consisted primarily of money market funds and marketable securities, largely composed of investment
grade, short- to intermediate-term fixed income securities.

The primary objective of our investment activities is to preserve capital to fund our operations. We also seek to maximize income from our
investments without assuming significant risk. To achieve our objectives, we maintain a portfolio of investments in a variety of securities of high credit
quality and short-term duration, according to our board-approved investment policy. Our investments are subject to interest rate risk and could fall in value
if market interest rates increase. A hypothetical 10% relative change in interest rates during any of the periods presented would not have had a material
impact on our consolidated financial statements.

Item 8. Financial Statements and Supplemental Data

The information required to be filed in this item appears under “Exhibits, Financial Statement Schedules” in Part IV, Item 15 of this Annual Report on
Form 10-K and is set forth on pages F-1 to F-30.

The following financial statements of the registrant, related notes and report of independent registered public accounting
firm are set forth beginning on page F-1 of this report

Report of Independent Registered Public Accounting Firm
Financial Statements:
Balance Sheets
Statements of Operations and Comprehensive Loss
Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit)
Statements of Cash Flows
Notes to Financial Statements

85

Page

F-2

F-3
F-4
F-5
F-6
F-7

 
 
 
 
 
 
 
 
 
Item 9.

Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

None.

Item 9A.

Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, have evaluated our disclosure controls and

procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) as of the end of the period covered by this Annual Report on Form 10-K.
Based on that evaluation, our chief executive officer and our chief financial officer have concluded that, as of the end of the period covered by this Annual
Report on Form 10-K, our disclosure controls and procedures are designed at a reasonable assurance level and are effective to provide reasonable assurance
that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported
within the time periods specified in SEC rules and forms, and that such information is accumulated and communicated to our management, including the
Chief Executive Officer and the Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures.

Management’s Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rules 13a-15(f)

and 15d-15(f) of the Exchange Act. Our management, under the supervision and with the participation of our Chief Executive Officer and Chief Financial
Officer, conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2019 based on the framework in
Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework). Based on
the results of its evaluation, our management concluded that our internal control over financial reporting was effective as of December 31, 2019.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and

15d-15(d) of the Exchange Act that occurred during the quarter ended December 31, 2019 that have materially affected, or are reasonably likely to
materially affect, our internal control over financial reporting.

Inherent Limitation on the Effectiveness of Internal Control

The effectiveness of any system of internal control over financial reporting, including ours, is subject to inherent limitations, including the exercise

of judgment in designing, implementing, operating, and evaluating the controls and procedures, and the inability to eliminate misconduct completely.
Accordingly, in designing and evaluating the disclosure controls and procedures, management recognizes that any system of internal control over financial
reporting, including ours, no matter how well designed and operated, can only provide reasonable, not absolute assurance of achieving the desired control
objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that management is
required to apply its judgment in evaluating the benefits of possible controls and procedures relative to their costs. Moreover, projections of any evaluation
of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of
compliance with the policies or procedures may deteriorate. We intend to continue to monitor and upgrade our internal controls as necessary or appropriate
for our business, but cannot assure you that such improvements will be sufficient to provide us with effective internal control over financial reporting.

Item 9B.

Other Information.

We will hold our first annual meeting of stockholders as a public company on May 28, 2020. The record date for the meeting is April 9, 2020.

86

 
 
Item 10. Directors, Executive Officers and Corporate Governance

PART III

Information required by this item is incorporated by reference to the information set forth in the sections titled “Information About Our Board of
Directors” and “Information About Our Executive Officers Who Are Not Directors,” “Corporate Governance,” “Corporate Governance – Code of Business
Conduct and Ethics,” “Delinquent Section 16(a) Reports,” “Corporate Governance – Committees of the Board of Directors – Nominating and Corporate
Governance Committee,” “Corporate Governance – Committees of the Board of Directors – Audit Committee” and “Corporate Governance – Committees
of the Board of Directors – Compensation Committee” in our definitive proxy statement to be filed with the SEC on Schedule 14A in connection with our
2020 Annual Meeting of Shareholders, or the Proxy Statement, which is expected to be filed not later than 120 days after December 31, 2019.

Item 11.

 Executive Compensation

Information required by this item is incorporated by reference to the information set forth in the sections titled “Executive Compensation,” “Director

Compensation” and “Committees of the Board of Directors — Compensation Committee Interlocks and Insider Participation” in the Proxy Statement.

Item 12.

 Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

Information required by this item is incorporated by reference to the information set forth in the sections titled “Securities Authorized For Issuance
Under Equity Compensation Plans” and “Security Ownership of Certain Beneficial Owners and Management” in the Proxy Statement and is incorporated
herein by reference.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

Information required by this item is incorporated by reference to the information set forth in the sections titled “Corporate Governance – Board of

Directors Independence” and “Transactions With Related Persons” in the Proxy Statement and is incorporated herein by reference.

Item 14. Principal Accounting Fees and Services.

Information required by this item is incorporated by reference to the information set forth in the sections titled “Independent Registered Public

Accounting Firm Fees and Services” in the Proxy Statement.

87

 
 
 
 
Item 15. Exhibits, Financial Statement Schedules.

(a)

1.

The following documents are filed as part of this Annual Report on Form 10-K:

Financial Statements:

PART IV

The following financial statements and schedules of the Registrant are contained in Part II, Item 8, “Financial Statements and Supplementary
Data” of this Annual Report on Form 10-K:

Report of Independent Registered Public Accounting Firm
Financial Statements:
Balance Sheets
Statements of Operations and Comprehensive Loss
Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit)
Statements of Cash Flows
Notes to the Financial Statements

2.

Financial Statement Schedules

Page

F-2

F-3
F-4
F-5
F-6
F-7

No financial statement schedules are provided because the information called for is not required or is shown either in the financial statements
or notes thereto.

(b)

Exhibits

The exhibits listed in the following “Exhibit Index” are filed, furnished or incorporated by reference as part of this Annual Report.

88

 
 
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT INDEX

Exhibit Description

Form  

File No.

Exhibit

Filing Date

Filed
Herewith

Number

    2.1¥*

3.1

3.2

4.1

4.2

4.3

10.1+

10.2+

10.3+

10.4+

10.5+

10.6+

10.7+

10.8+

10.9¥

10.10

10.11¥

10.12¥

10.13¥

10.14¥

10.15

Asset Transfer Agreement by and between the Registrant and Maverick Therapeutics,
Inc., dated as of December 30, 2016, as amended

S-1

333-229040

  Amended and Restated Certificate of Incorporation of the Registrant

10-Q  

001-38800

  Amended and Restated Bylaws of the Registrant

  Form of Common Stock Certificate.

Amended and Restated Investors’ Rights Agreement, dated as of November 9, 2018, by
and among the Registrant and certain of its stockholders.

Description of Registrant’s securities registered pursuant to Section 12 of the Securities
Exchange Act of 1934

Form of Indemnification Agreement between the Registrant and each of its directors
and executive officers

  Harpoon Therapeutics, Inc. 2015 Equity Incentive Plan and related form agreements

  Harpoon Therapeutics, Inc. 2019 Equity Incentive Plan and related form agreements

Harpoon Therapeutics, Inc. Amended and Restated Employee Stock Purchase Plan and
related form agreements

Employment Offer Letter by and between Gerald McMahon and the Registrant, dated
as of December 10, 2016

Employment Offer Letter by and between Holger Wesche and the Registrant, dated as
of March 17, 2015, as amended

Employment Offer Letter by and between Natalie Sacks and the Registrant, dated as of
September 13, 2018

  Non-Employee Director Compensation Policy

License Agreement between the Registrant and TCR2 Therapeutics, Inc., dated as of
June 21, 2017

Royalty Transfer Agreement by and between the Registrant, MPM Oncology
Charitable Foundation, Inc. and the UBS Optimus Foundation, dated as of December 1,
2016, as amended

First Amended and Restated Assignment and License Agreement between the
Registrant and Werewolf Therapeutics, Inc., dated as of October 19, 2018

CHEF 1 Collaboration and License Agreement between the Registrant and CMC ICOS
Biologics, Inc., dated October 26, 2015

Amendment to CHEF1 Collaboration and License Agreement and Development and
Manufacturing Services Agreement between Registrant and AGC Biologics, Inc.
(previously CMC ICOS Biologics, Inc.), dated as of December 12, 2018

Development and Manufacturing Services Agreement between the Registrant and CMC
ICOS Biologics, Inc., dated July 5, 2016

Lease by and between the Registrant and HCP Oyster Point III LLC, dated as of July
27, 2018

8-K

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

001-38800

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

333-229040

  10.16+

Employment Offer Letter by and between Georgia Erbez and the Registrant, dated as of
October 19, 2018

10.17¥

10.18¥

10.19¥

10.20+

Amended and Restated Discovery Collaboration and License Agreement between the
Registrant and AbbVie Biotechnology Ltd., dated as of November 20, 2019

Development and Option Agreement between the Registrant and AbbVie
Biotechnology Ltd., dated as of November 20, 2019

Second Amended and Restated Assignment and License Agreement between the
Registrant and Werewolf Therapeutics, Inc., dated as of December 20, 2019

Fifth Amended and Restated Consulting Agreement by and between Patrick Baeuerle
and the Registrant, dated as of March 3, 2020

2.1

3.1

3.2

4.1

4.2

10.4

10.1

10.2

10.3

10.5

10.6

10.7

10.10

10.12

10.13

10.14

10.15

10.21

10.16

10.19

10.20

1/29/2019

8/5/2019

2/13/2019

1/29/2019

12/27/2018

1/4/2019

12/27/2018

1/29/2019

1/29/2019

12/27/2018

12/27/2018

12/27/2018

1/29/2019

12/27/2018

12/27/2018

12/27/2018

12/27/2018

1/29/2019

12/27/2018

12/27/2018

1/4/2019

x

x

x

x

x

21.1

  List of subsidiaries of the Registrant

S-1

333-229040

21.1

12/27/2018

89

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Number

23.1

24.1

31.1

31.2

  32.1†

Exhibit Description

Form  

File No.

Exhibit

Filing Date

  Consent of Independent Registered Public Accounting Firm

  Power of Attorney (included on signature page to this Form 10-K)

Certification of Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and
15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Certification of Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and
15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Certifications of Chief Executive Officer and Chief Financial Officer pursuant to 18
U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002

Filed
Herewith

x

x

x

x

x

101.INS   XBRL Instance Document

101.SCH   XBRL Taxonomy Schema Linkbase Document

101.CAL   XBRL Taxonomy Definition Linkbase Document

101.DEF   XBRL Taxonomy Calculation Linkbase Document

101.LAB   XBRL Taxonomy Labels Linkbase Document

101.PRE   XBRL Taxonomy Presentation Linkbase Document

†

+

¥

*

  The certifications attached as Exhibit 32.1 that accompany this Annual Report on Form 10-K, are deemed furnished and not filed with the Securities and Exchange Commission

and are not to be incorporated by reference into any filing of Harpoon Therapeutics, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as
amended, whether made before or after the date of this Annual Report on Form 10-K, irrespective of any general incorporation language contained in such filing.

  Indicates management contract or compensatory plan.

  Confidential treatment has been granted as to certain portions of this exhibit, which portions have been omitted and submitted separately to the Securities and Exchange

Commission.

  Certain schedules and/or exhibits to this agreement have been omitted in accordance with Item 601(b)(2) of Regulation S-K. A copy of any omitted schedule and/or exhibit will

be furnished to the Securities and Exchange Commission upon request.

**

  Portions of this exhibit have been omitted in accordance with Item 601(b)(10) of Regulation S-K.

Item 16. Form 10-K Summary

None.

90

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report

to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: March 12, 2020

SIGNATURES

HARPOON THERAPEUTICS, INC.
/s/ Gerald McMahon, Ph.D.
By:
Gerald McMahon, Ph.D.
President and Chief Executive Officer

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Gerald McMahon,

Ph.D. and Georgia Erbez, and each of them, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution for him or her, and in
his or her name in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with exhibits thereto
and other documents in connection therewith, with the U.S. Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done therewith, as fully to all intents and
purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, and either of them, his or her
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on

behalf of the Registrant in the capacities and on the dates indicated.

Signature

Title

/s/ Gerald McMahon, Ph.D.
Gerald McMahon, Ph.D.

/s/ Georgia Erbez
Georgia Erbez

/s/ Luke Evnin, Ph.D.
Luke Evnin, Ph.D.

/s/ Patrick Baeuerle, Ph.D.
Patrick Baeuerle, Ph.D.

/s/ Mark Chin
Mark Chin

/s/ Jonathan Drachman, M.D.
Jonathan Drachman, M.D.

/s/ Julie Eastland
Julie Eastland

/s/ Ron Hunt
Ron Hunt

/s/ Scott Myers
Scott Myers

President, Chief Executive Officer and 
Director (Principal Executive Officer)

Chief Financial Officer (Principal 
Financial and Accounting Officer)

Date

March 12, 2020

March 12, 2020

Chairman of the Board of Directors

March 12, 2020

Director

Director

Director

Director

Director

Director

91

March 12, 2020

March 12, 2020

March 12, 2020

March 12, 2020

March 12, 2020

March 12, 2020

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
HARPOON THERAPEUTICS, INC.
INDEX TO FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm
Financial Statements:
Balance Sheets
Statements of Operations and Comprehensive Loss
Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit)
Statements of Cash Flows
Notes to the Financial Statements

F-1

Page

F-2

F-3
F-4
F-5
F-6
F-7

 
 
 
 
 
 
 
Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Harpoon Therapeutics, Inc.

Opinion on the Financial Statements

We have audited the accompanying balance sheets of Harpoon Therapeutics, Inc. (the Company), as of December 31, 2019 and 2018, the related
statements of operations and comprehensive loss, convertible preferred stock and stockholders’ equity (deficit) and cash flows for each of the three years in
the period ended December 31, 2019, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements
present fairly, in all material respects, the financial position of the Company at December 31, 2019 and 2018, and the results of its operations and its cash
flows for each of the three years in the period ended December 31, 2019 in conformity with U.S. generally accepted accounting principles.

Adoption of New Accounting Standard

As discussed in Note 1 to the financial statements, the Company changed its method of accounting for leases in 2019.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s

financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States)
(PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and
regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required
to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an
understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal
control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud,

and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and
disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management,
as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2017.

Redwood City, California
March 12, 2020

F-2

 
 
 
 
 
 
 
 
 
HARPOON THERAPEUTICS, INC.
Balance Sheets
(In thousands, except share and per share amounts)

December 31,

2019

2018

  $

  $

Assets
Current assets

Cash and cash equivalents
Short-term marketable securities
Prepaid expenses and other current assets

Total current assets
Property and equipment, net
Long-term marketable securities
Operating lease right-of-use asset
Tenant improvement allowance receivable
Other assets

Total assets

Liabilities, convertible preferred stock and stockholders' equity (deficit)
Current liabilities

Accounts payable
Accrued liabilities
Deferred revenue, current
Operating lease liabilities, current

Total current liabilities
Deferred revenue, noncurrent
Operating lease liabilities, net of current portion
Other long-term liabilities

Total liabilities

Commitments and contingencies (Note 7)
Convertible preferred stock, $0.0001 par value; 10,000,000 shares and 82,000,000
   shares authorized at December 31, 2019 and 2018, respectively; no shares and
   16,618,448 shares issued and outstanding as of December 31, 2019 and 2018,
   respectively
Stockholders' equity (deficit)
Common stock, $0.0001 par value; 150,000,000 shares and 114,000,000 shares
   authorized at December 31, 2019 and 2018, respectively; 24,904,848 shares and
   1,383,221 shares issued and outstanding at December 31, 2019 and 2018,
   respectively

Additional paid-in capital
Accumulated other comprehensive income
Accumulated deficit

Total stockholders' equity (deficit)
Total liabilities, convertible preferred stock and stockholders' equity (deficit)

  $

The accompanying notes are an integral part of these financial statements.

F-3

88,736    $
59,337   
2,544   
150,617   
11,383   
7,056   
7,015   
—   
533   
176,604    $

2,594   
7,495   
11,207   
1,217   
22,513   
46,144   
13,727   
—   
82,384   

89,493 
— 
730 
90,223 
2,998 
— 
— 
5,784 
3,575 
102,580 

4,357 
3,341 
4,250 
— 
11,948 
7,792 
— 
6,742 
26,482 

—   

129,577 

3 
212,339 

41   
(118,163)  
94,220   
176,604    $

1 
9,111 
— 
(62,591)
(53,479)
102,580

 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
  
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
  
 
 
 
 
 
 
   
 
 
 
 
 
  
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
HARPOON THERAPEUTICS, INC.
Statements of Operations and Comprehensive Loss
(in thousands, except share and per share data)

Revenue
Collaboration and license revenue

Total revenue
Operating expenses
Research and development
General and administrative
Total operating expenses

Loss from operations
Interest income
Interest expense
Other expense
Net loss
Other comprehensive loss:
Net unrealized gain on marketable securities
Comprehensive loss

Net loss per share, basic and diluted

2019

For the year ended December 31,
2018

2017

  $

5,777    $
5,777   

4,750    $
4,750   

41,592 
22,391 
63,983 
(58,206)
2,676 
— 
(42)

26,368 
6,106 
32,474 
(27,724)
395 
— 
(37)

(55,572)  

(27,366)  

  $

41 
(55,531)

(2.56)

 $

— 
(27,366)

(25.65)

 $

708 
708 

13,622 
3,614 
17,236 
(16,528)
78 
(285)
(95)
(16,830)

— 
(16,830)

(18.81)

Weighted-average common shares used in computing net loss per share,
   basic and diluted

21,746,461   

1,066,877   

894,901

The accompanying notes are an integral part of these financial statements.

F-4

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
    
 
 
   
 
 
 
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
  
  
 
 
 
 
 
 
    
 
    
 
  
 
 
  
  
 
 
  
  
 
 
 
 
 
 
 
 
Balance at December 31, 2016
Issuance of Series B convertible preferred
   stock at $6.39 per share, net of issuance
   costs of $271
Issuance of Series B convertible preferred
   stock at $6.39 per share upon
extinguishment
   of 2016 Notes and 2017 Notes, net of
issuance
   costs of $271
Capital transaction with a related party upon
   extinguishment of 2016 and 2017 Notes
Issuance of warrants related to 2017 Notes
Issuance of common stock for exercise
   of stock options
Issuance of common stock
Vesting of early exercised stock options
Stock-based compensation
Vesting of Founder's shares
Net loss and comprehensive loss
Balances at December 31, 2017
Issuance of Series B convertible preferred
   stock at $6.39 per share upon
extinguishment
   of 2016 Notes and 2017 Notes, net of
issuance
   costs of $8
Issuance of Series C convertible preferred
   stock at $10.77 per share, net of issuance
   costs of $256
Issuance of common stock for exercise
   of stock options
Vesting of early exercised stock options
Stock-based compensation
Vesting of Founder's shares
Repurchase of common stock
Net loss and comprehensive loss
Balances at December 31, 2018
Conversion of Series A, B, and C convertible
   preferred stock into common stock
Issuance of common stock upon
   exercise of warrants
Issuance of common stock upon initial public
   offering, net of offering costs of $10,122
Issuance of common stock for exercise
   of stock options
Vesting of early exercised stock options
Stock-based compensation
Vesting of Founder's shares
Net loss
Other comprehensive income
Balances at December 31, 2019

HARPOON THERAPEUTICS, INC.
Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit)
(in thousands, except share and per share data)

Convertible

  Additional  

Note
Receivable  

Accumulated
Other

Preferred Stock

Shares
3,050,329  

  Amount
  $

14,926  

Common Stock

Shares

821,844  

  Amount  
1  
  $

  Paid-In  
  Capital
  $

7,978  

from  
  Stockholder 
  $

  Comprehensive 
  Income/(Loss)  
—  

(28 )   $

  Accumulated 
Deficit

Total
Stockholders'
Equity
(Deficit)

  $

(18,395 )

  $

(10,444 )

3,128,541  

19,729  

—  

—  

—  

—  

—  

—  

—  

811,103  

5,186  

—  
—  

—  
—  
—  
—  
—  
—  
6,989,973  

—  
—  

—  
—  
—  
—  
—  
—  
39,841  

3,128,540  

19,992  

6,499,935  

69,744  

—  
—  
—  
—  
—  
—  
16,618,448  

—  
—  
—  
—  
—  
—  
129,577  

—  

—  
—  

7,897  
3,050  
30,502  
—  
85,001  
—  
948,294  

—  

—  

125,533  
56,025  
—  
81,567  
—  
—  
1,211,419  

(16,618,448 )  

(129,577 )  

  16,618,448  

—  

—  

—  
—  
—  
—  
—  
—  
—  

  $

—  

—  

—  
—  
—  
—  
—  
—  
—  

563,043  

5,769,201  

572,436  
93,336  
—  
22,181  
—  
—  
  24,850,064  

  $

—  

—  
—  

—  
—  
—  
—  
—  
—  
1  

—  

—  

—  
—  
—  
—  
—  
—  
1  

1  

—  

1  

—  
—  
—  
—  
—  
—  
3  

  $

—  

(204 )  
144  

4  
2  
18  
367  
—  
—  
8,309  

—  

—  

122  
36  
644  
—  
—  
—  
9,111  

129,575  

70,646  

803  
133  
2,071  
—  
—  
—  
212,339  

  $

—  

—  
—  

—  
—  
—  
—  
—  
—  
(28 )  

—  

—  

—  
28  
—  
—  
—  
—  

—  

—  

—  

—  
—  
—  
—  
—  
—  
—  

  $

The accompanying notes are an integral part of these financial statements.

F-5

—  

—  
—  

—  
—  
—  
—  
—  

—  

—  

—  

—  
—  
—  
—  
—  
—  
—  

—  

—  

—  

—  
—  
—  
—  
—  
41  
41  

—  

—  
—  

—  
—  
—  
—  
—  
(16,830 )
(35,225 )

—  

—  

—  
—  
—  
—  
—  
(27,366 )
(62,591 )

—  

—  

—  

—  
—  
—  
—  
(55,572 )
—  
(118,163 )

  $

  $

—  

(204 )
144  

4  
2  
18  
367  
—  
(16,830 )
(26,943 )

—  

—  

122  
36  
672  
—  
—  
(27,366 )
(53,479 )

129,576  

—  

70,647  

803  
133  
2,071  
—  
(55,572 )
41  
94,220  

 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
HARPOON THERAPEUTICS, INC.
Statements of Cash Flows
(in thousands)

Cash flows from operating activities
Net loss
Adjustments to reconcile net loss to net cash (used in) provided by operating activities

Stock-based compensation expense
Depreciation and amortization
Non cash lease expense
Accrued interest on convertible notes payable
Net amortization of discounts on marketable securities
Amortization of debt discount
Changes in operating assets and liabilities
Prepaid expenses and other assets
Other assets
Accounts payable
Accrued liabilities
Deferred revenue
Operating lease liabilities
Deferred revenue, non current
Other long-term liabilities

Net cash (used in) provided by operating activities
Cash flows from investing activities
Purchases of property and equipment
Purchases of marketable securities
Proceeds from repayment of note receivable
Maturities of marketable securities
Net cash (used in) provided by investing activities
Cash flows from financing activities
Proceeds from initial public offering of common stock, net of commissions
Proceeds from issuance of convertible preferred stock, net of issuance costs
Proceeds from issuance of convertible notes, net of issuance costs
Proceeds from issuance of common stock upon exercise of stock options, net
Proceeds from issuance of common stock
Payments of deferred initial public offering costs
Net cash provided by financing activities
Net increase (decrease) in cash, cash equivalents, and restricted cash
Cash, cash equivalents, and restricted cash at beginning of period
Cash, cash equivalents, and restricted cash at end of period
Supplemental disclosures of non-cash investing and financing information
Conversion of preferred stock to common stock and additional paid-in capital
Issuance of Series B convertible preferred stock upon extinguishment of
   2016 Notes and 2017 Notes
Capital transaction with a related party upon extinguishment of Notes
Purchases of property and equipment included in accounts payable
Deferred initial public offering costs included in accounts payable and
   accrued liabilities
Reclassification of employee stock liability to equity upon vesting
Right-of-use asset obtained in exchange for lease obligation
Modification of operating lease
Tenant improvements provided by landlord
Series C preferred stock issuance costs included in accounts payable and
   accrued liabilities

2019

For the year ended December 31,
2018

2017

 $

(55,572)

 $

(27,366)

 $

(16,830)

2,071 
900 
1,202 
— 
(541)  
— 

(1,814)
3,042 
(1,761)
4,288 
6,957 

(15)  

38,352 
— 
(2,891)

(3,516)
(141,816)  

— 
76,017 
(69,315)

70,646 
— 
— 
803 
— 
— 
71,449 
(757)
89,960 
89,203 

 $

129,577 

  $

  $
— 
— 
  $
(16)   $

  $

— 
133 
8,405 
  $
(188)   $
  $
5,784 

— 

  $

672 
644 

— 
— 
— 

(507)
— 
2,555 
1,048 
(4,250)
— 
— 
78 
(27,126)

(663)
— 
— 
— 
(663)

— 
89,828 
— 
158 
— 
(1,660)  
88,326 
60,537 
29,423 
89,960 

 $

— 

  $

— 
— 
28 

  $
  $
  $

1,309 

  $

— 
— 
6,648 

  $
  $
  $

92 

  $

 $

 $

 $
 $
 $

 $
 $
 $
 $
 $

 $

367 
366 

153 
— 
132 

335 
(138)
804 
257 
16,292 
— 
— 
(24)
1,714 

(2,275)
— 
6,750 
— 
4,475 

— 
19,729 
2,496 
22 
2 
— 
22,249 
28,438 
985 
29,423 

— 

5,186 
(204)
— 

78 

— 
— 
— 

—  

The accompanying notes are an integral part of these financial statements.

F-6

 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
  
 
 
  
  
 
 
 
 
  
 
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
  
  
  
  
  
  
  
  
  
  
 
 
 
  
 
 
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
  
 
 
 
 
  
 
 
 
 
  
  
  
  
  
  
  
  
  
  
 
 
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
 
  
 
 
  
 
 
 
HARPOON THERAPEUTICS, INC.

Notes to the Financial Statements

1.

Organization

Description of Business

Harpoon Therapeutics, Inc. (the “Company”) is a clinical-stage immunotherapy company developing a novel class of T cell engagers that harness

the power of the body’s immune system to treat patients suffering from cancer and other diseases. T cell engagers are engineered proteins that direct a
patient’s own T cells to kill target cells that express specific proteins, or antigens, carried by the target cells. Using a proprietary Tri-specific T cell
Activating Construct, (“TriTAC”), platform, the Company is developing a pipeline of novel T cell engagers, or TriTACs, initially focused on the treatment
of solid tumors and hematologic malignancies. The Company was incorporated in Delaware in March 2015 and is headquartered in South San Francisco,
California.

Initial Public Offering

On February 7, 2019, the Company’s registration statement on Form S-1 relating to its initial public offering (“IPO”) was declared effective by the

Securities and Exchange Commission (“SEC”) and the shares of its common stock began trading on the NASDAQ Global Select Market (“Nasdaq”) on
February 8, 2019. The public offering price of the shares sold in the IPO was $14.00 per share. The IPO closed in February 2019, pursuant to which the
Company sold 5,769,201 shares of common stock, for gross proceeds of approximately $80.8 million, including the exercise in part of the underwriters’
option to purchase additional shares.  The Company received net proceeds from the IPO of approximately $70.7 million, after underwriting discounts,
commissions and offering costs.  

Immediately prior to the completion of the IPO on February 12, 2019, all outstanding shares of redeemable convertible preferred stock, including

preferred stock warrants, were converted into 17,181,491 shares of common stock and $129.6 million was reclassified from temporary equity to additional
paid in capital on the balance sheet. Subsequent to the closing of the IPO, there were no shares of redeemable convertible preferred stock outstanding.

Liquidity

Since inception, the Company has incurred significant losses and has negative cash flows from operations. As of December 31, 2019, the Company
had an accumulated deficit of $118.2 million. Management expects to continue to incur additional substantial losses in the foreseeable future as a result of
the Company’s research and development activities.

As of December 31, 2019, the Company had cash, cash equivalents, and marketable securities of $155.1 million, which is available to fund future

operations. The Company believes that the proceeds from the IPO, along with the Company’s cash, cash equivalents and marketable securities as of
December 31, 2019, provide sufficient capital resources to continue its operations for at least 12 months from the issuance date of these financial
statements. The Company will need to raise additional capital to support the completion of its research and development activities. The Company’s
activities are subject to significant risks and uncertainties, including failing to secure additional funding to continue to operationalize the Company’s
current technology and to advance the development of its product candidates.

2.

Summary of Significant Accounting Policies

Basis of Presentation

The financial statements have been prepared in accordance with U.S. generally accepted accounting principles.

Reverse Stock Split

On January 28, 2019, the Company filed an amendment to the Company’s amended and restated certificate of incorporation to effect a reverse split

of shares of the Company’s common stock and convertible preferred stock on a 4.9175-for-one basis (the “Reverse Stock Split”). The par value and the
authorized number of shares of the convertible preferred stock and common stock were not adjusted in connection with the Reverse Stock Split. All
references to common stock, convertible preferred stock, warrants to purchase common stock, options to purchase common stock, early exercised options,
restricted stock, share data, per share data and related information contained in the financial statements have been retrospectively adjusted to reflect the
effect of the Reverse Stock Split for all periods presented.

F-7

 
Use of Estimates 

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported

amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of
revenue and expenses during the reporting period. Significant estimates and assumptions made in the accompanying financial statements include, but are
not limited to, the fair value of common stock, the fair value of stock options, the research period of the collaboration agreements with AbbVie
Biotechnology Ltd., operating lease liabilities, income tax uncertainties and certain accruals. The Company evaluates its estimates and assumptions on an
ongoing basis using historical experience and other factors and adjusts those estimates and assumptions when facts and circumstances dictate. Actual
results could differ from those estimates.

Segment Reporting

Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by
the Company’s Chief Operating Decision Maker in making decisions regarding resource allocation and assessing performance. To date, the Company has
viewed its operations and manages its business as one segment operating primarily in the United States.

Cash, Cash Equivalents and Restricted Cash 

The Company considers all highly liquid investments purchased with original maturities of three months or less from the purchase date to be cash

equivalents. Cash equivalents consist primarily of amounts invested in money market accounts and are stated at fair value.

The Company maintained restricted cash of $0.5 million and $0.5 million as of December 31, 2019 and 2018, respectively. This amount is included

within “Other assets” in the accompanying balance sheets and is comprised solely of a letter of credit required pursuant to the lease for the Company’s
corporate headquarters entered into in August 2018 as discussed in Note 7.

The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the balance sheets that sum to the total

of the same amounts shown in the statement of cash flows.

Balance Sheets

Cash and cash equivalents
Restricted cash (included in other assets)

Cash, cash equivalents and restricted cash in Statements of Cash Flows

Marketable Securities

2019

As of December 31,
2018
(in thousands)

2017

  $

  $

88,736 
467 
89,203 

 $

 $

89,493 
467 
89,960 

  $

  $

29,423 
— 
29,423

The Company generally invests its excess cash in money market funds and investment grade short- to intermediate-term fixed income securities.

Such investments are included in cash and cash equivalents, short-term marketable securities or long-term marketable securities on the balance sheets.
Marketable securities with a maturity date greater than 90 days and less than one year at each balance sheet date are classified as short-term. Marketable
securities with a maturity date greater than one year at each balance sheet date are classified as long-term. All of the Company’s marketable securities are
considered available-for-sale and are reported at fair value with unrealized gains and losses included as a component of stockholders’ equity (deficit). The
amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity, which is included in interest income, net
on the statements of operations. Realized gains and losses and declines in value judged to be other-than-temporary, if any, on marketable securities are
included in interest income, net on the statements of operations. The cost of securities sold is determined using specific identification.

F-8

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
   
  
 
 
  
   
 
 
The Company periodically evaluates whether declines in the fair values of its marketable securities below their amortized cost are other-than-

temporary. This evaluation consists of several qualitative and quantitative factors regarding the severity and duration of the unrealized loss, as well as the
Company’s ability and intent to hold the marketable security until a forecasted recovery occurs. Additionally, the Company assesses whether it has plans to
sell the marketable security or it is more likely than not it will be required to sell any marketable securities before recovery of its amortized cost basis.
Factors considered include quoted market prices, recent financial results and operating trends, implied values from any recent transactions or offers of
investee securities, credit quality of debt instrument issuers, other publicly available information that may affect the value of the marketable security,
duration and severity of the decline in value, and the Company’s strategy and intentions for holding the marketable security.

Concentration of Credit Risk

The Company is subject to credit risk from its portfolio of cash equivalents and marketable securities. The Company invests in money market funds

through a major U.S. bank and is exposed to credit risk in the event of default by the financial institution to the extent of amounts recorded on the
consolidated balance sheets. The Company invests in money market funds and investment grade short- to intermediate-term fixed income securities. Under
its investment policy, the Company limits amounts invested in such securities by credit rating, maturity, industry group, investment type and issuer, except
for securities issued by the U.S. government. The Company is not exposed to any significant concentrations of credit risk from these financial instruments.
The goals of the Company’s investment policy, in order of priority, are as follows: preservation of principal; liquidity of investments; fiduciary control of
cash and investments; prevention of  inappropriate concentrations of investments; obtaining the best yields. The Company minimizes the amount of credit
exposure by investing cash that is not required for immediate operating needs in money market funds and marketable securities.

Leases

The Company evaluates arrangements at inception to determine if an arrangement is or contains a lease. Operating lease assets represent the

Company’s right to use an underlying asset for the lease term and operating lease liabilities represent the Company’s obligation to make lease payments
arising from the lease. Operating lease assets and liabilities are recognized at the commencement date of the lease based upon the present value of lease
payments over the lease term. When determining the lease term, the Company includes options to extend or terminate the lease when it is reasonably
certain that the Company will exercise that option. The Company uses an incremental borrowing rate that the Company would expect to incur for a fully
collateralized loan over a similar term under similar economic conditions to determine the present value of the lease payments.

The lease payments used to determine the Company’s operating lease assets may include lease incentives and stated rent increases and are

recognized in the Company’s operating lease assets in the balance sheets. Operating lease liabilities are accreted over the term of the lease using the
incremental borrowing rate and the associated expense is recorded to operating expenses in the statement of operations and comprehensive loss. The
Company recognizes lease expenses on a straight-line basis over the lease term. Variable lease payments are recognized as the associated obligation is
incurred.

Fair Value Measurement

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability, or an exit price, in the principal or most
advantageous market for that asset or liability in an orderly transaction between market participants on the measurement date, and established a fair value
hierarchy that requires an entity to maximize the use of observable inputs, where available, and minimize the use of unobservable inputs when measuring
fair value.

F-9

 
 
The Company measures fair value based on a three-level hierarchy of inputs, of which the first two are considered observable and the last

unobservable. Unobservable inputs reflect the Company’s own assumptions about current market conditions. The three-level hierarchy of inputs is as
follows:

Level 1—Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date;

Level 2—Inputs (other than quoted prices included in Level 1) are either directly or indirectly observable for the asset or liability. These include
quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not
active; and

Level 3— Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

To the extent that the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value

requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in
Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value
measurement.

The carrying amounts reflected in the accompanying balance sheets for cash and cash equivalents, short-term marketable securities, prepaid
expenses, other current assets, accounts payable, accrued expenses and other current liabilities approximate their fair values, due to their short-term nature.

Property and Equipment, Net

Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed on a straight-line basis over the

estimated useful lives of the related assets, generally three to five years. Leasehold improvements are amortized using the straight-line method over the
shorter of the assets’ estimated useful lives or the remaining term of the lease. Depreciation and amortization begin at the time the asset is placed in service.
Maintenance and repairs are charged to operations as incurred. Upon sale or retirement of assets, the cost and related accumulated depreciation are removed
from the balance sheet and the resulting gain or loss is reflected in operations.

Impairment of Long-Lived Assets

The Company evaluates its long-lived assets, including property and equipment, for impairment whenever events or changes in business
circumstances indicate that the carrying amount of the assets or group of assets may not be fully recoverable. If indicators of impairment exist and the
undiscounted future cash flows that the assets are expected to generate are less than the carrying amount of the assets, the Company reduces the carrying
amount of the assets through an impairment charge to their estimated fair values based on a discounted cash flow approach or, when available and
appropriate, to comparable market values. There were no impairments of long-lived assets for any of the periods presented.

Revenue Recognition

Effective January 1, 2017, the Company early adopted Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with
Customers (“Topic 606”) on a full retrospective basis. This standard applies to all contracts with customers. In accordance with Topic 606, the Company
recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration which the Company
expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that the Company determines are within the
scope of Topic 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in
the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue
when (or as) the Company satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that it will
collect the consideration it is entitled to in exchange for the goods and services it transfers to the customer. At contract inception, the Company assesses the
goods or services promised within each contract that falls under the scope of Topic 606, determines those that are performance obligations and assesses
whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the
respective performance obligation when (or as) the performance obligation is satisfied.

F-10

 
The Company enters into corporate collaborations under which it may obtain upfront license fees, research and development funding, and
development, regulatory and commercial milestone payments and royalty payments. The Company’s performance obligations under these arrangements
may include licenses of intellectual property, distribution rights, research and development services, delivery of manufactured product and/or participation
on joint steering committees.

Licenses of intellectual property: If the license to the Company’s intellectual property is determined to be distinct from the other performance
obligations identified in the arrangement, the Company recognizes revenue from upfront license fees allocated to the license when the license is transferred
to the customer and the customer is able to use and benefit from the license. For licenses that are bundled with other promises, the Company utilizes
judgement to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or
at a point in time and, if over time, the appropriate method of measuring proportional performance for purposes of recognizing revenue from non-
refundable, up-front fees. The Company evaluates the measure of proportional performance each reporting period and, if necessary, adjusts the measure of
performance and related revenue recognition. We recognize collaboration revenue by measuring the progress toward complete satisfaction of the
performance obligation using an input measure. In order to recognize revenue over the research and development period, we measure actual costs incurred
to date compared to the overall total expected costs to satisfy the performance obligation. Revenues are recognized as the program costs are incurred. We
will re-evaluate the estimate of expected costs to satisfy the performance obligation each reporting period and make adjustments for any significant
changes.

Milestone payments: At the inception of each arrangement that includes development, regulatory or commercial milestone payments, the Company

evaluates whether the milestones are considered probable of being reached and estimates the amount to be included in the transaction price. Topic 606
suggests two alternatives to use when estimating the amount of variable consideration: the expected value method and the most likely amount method.
Under the expected value method, an entity considers the sum of probability-weighted amounts in a range of possible consideration amounts. Under the
most likely amount method, an entity considers the single most likely amount in a range of possible consideration amounts. Whichever method is used, it
should be consistently applied throughout the life of the contract; however, it is not necessary for the Company to use the same approach for all contracts.
The Company expects to use the most likely amount method for development and regulatory milestone payments. If it is probable that a significant revenue
reversal would not occur, the associated milestone value is included in the transaction price. Milestone payments that are not within the Company’s or the
licensee’s control, such as regulatory approvals, are not considered probable of being achieved until those approvals are received. The transaction price is
then allocated to each performance obligation on a relative stand-alone selling price basis. The Company recognizes revenue as or when the performance
obligations under the contract are satisfied. At the end of each subsequent reporting period, the Company re-evaluates the probability or achievement of
each such milestone and any related constraint, and if necessary, adjusts its estimates of the overall transaction price. Any such adjustments are recorded on
a cumulative catch-up basis, which would affect revenues and earnings in the period of adjustment.

Commercial milestones and royalties: For arrangements that include sales-based royalties, including milestone payments based on the level of sales,
and in which the license is deemed to be the predominant item to which the royalties relate, the Company recognizes revenue when the related sales occur.
To date, the Company has not recognized any royalty revenue resulting from its collaboration arrangements.

Upfront payments and fees are recorded as deferred revenue upon receipt or when due, and may require deferral of revenue recognition to a future

period until the Company performs its obligations (i.e. research and development services) under these arrangements. Amounts due to the Company are
recorded as accounts receivable when the Company’s right to consideration is unconditional. Amounts recognized as revenue prior to receipt are recorded
as contract assets included in prepaid expenses and other current assets on the balance sheet. If we expect to have an unconditional right to receive the
consideration in the next twelve months, this will be classified in current assets.

Research and Development Expenses and Accrued Research and Development Costs

The Company expenses research and development costs as incurred. Research and development expenses consist of personnel costs for the

Company’s research and product development employees. Also included are non-personnel costs such as professional fees payable to third parties for
preclinical studies, clinical trials, research services, production of materials for clinical trials, laboratory supplies and equipment maintenance and
depreciation, intellectual property licenses and other consulting costs.

F-11

 
The Company estimates preclinical and clinical study and research expenses based on the services performed, pursuant to contracts with research

institutions that conduct and manage preclinical studies, clinical trials and research services and manufacturing organizations in connection with the
production of materials for clinical trials on its behalf. The Company estimates these expenses based on discussions with internal management personnel
and external service providers as to the progress or stage of completion of services and the contracted fees to be paid for such services. The Company
records the estimated costs of research and development activities based upon the estimated amount services provided but not yet invoiced, and includes
these costs in development expenses. The Company accrues for these costs based on factors such as estimates of the work completed and in accordance
with agreements established with its third-party service provides under the service agreements. The Company makes significant judgments and estimates in
determining the accrued liabilities balance in each reporting period. As actual costs become known, the Company adjusts its accrued liabilities. The
Company has not experienced any material differences between accrued costs and actual costs incurred. However, the status and timing of actual services
performed may vary from the Company’s estimates, resulting in adjustments to expense in future periods. Changes in these estimates that result in material
changes to the Company’s accruals could materially affect the Company’s results of operations. Payments associated with licensing agreements to acquire
exclusive license to develop, use, manufacture and commercialize products that have not reached technological feasibility and do not have alternate future
use are expensed as incurred.

Payments made to third parties under these arrangements in advance of the performance of the related services by the third parties are recorded as

prepaid expenses until the services are rendered. Such payments are evaluated for current or long-term classification based on when such services are
expected to be received.

Stock-Based Compensation

The Company maintains a stock-based compensation plan as a long-term incentive for employees, consultants and members of the Company’s
board of directors (the “Board”). The plan allows for the issuance of non-statutory options (“NSOs”) and incentive stock options to employees and NSOs to
nonemployees.

Share-based payments are measured using fair-value-based measurements and recognized as compensation expense over the service period in which
the awards are expected to vest. The Company’s fair-value-based measurements of awards to employees and directors as of the grant date utilize the single-
option award-valuation approach, and the Company uses the straight-line method for expense attribution. The fair-value-based measurements of options
granted to nonemployees are remeasured at each period end until the options vest and are amortized to expense as earned. The valuation model used for
calculating the estimated fair value of stock awards is the Black-Scholes option-pricing model. The Black-Scholes model requires the Company to make
assumptions and judgments about the variables used in the calculations, including the expected term (weighted-average period of time that the options
granted are expected to be outstanding), the expected volatility of the Company’s common stock, the related risk-free interest rate and the expected
dividend. The Company has elected to recognize forfeitures of share-based payment awards as they occur.

Effective January 1, 2018, the Company early adopted ASU No. 2018-07, Compensation – Stock Compensation (Topic 718): Improvements to

Nonemployee Share-Based Payment Accounting. The new guidance requires equity-classified share-based payment awards issued to nonemployees to be
measured on the grant date, instead of being measured through the performance completion date under the current guidance. For stock-based awards issued
to non-employees, the Company records expense related to stock options based on the fair value of the options calculated using the Black-Scholes option-
pricing model based on the measured grant date.

Convertible Preferred Stock

The Company records all shares of convertible preferred stock at their respective fair values less issuance costs on the dates of issuance. The
convertible preferred stock is recorded outside of stockholders’ equity (deficit) because, in the event of certain deemed liquidation events considered not
solely within the Company’s control, such as a merger, acquisition and sale of all or substantially all of the Company’s assets, the convertible preferred
stock will become redeemable at the option of the holders.

Income Taxes

Income taxes are accounted for under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the

future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective
tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates applied to taxable income
in the years in which those temporary differences are expected to be realized. The effect on deferred tax assets and liabilities of a change in tax rates is
recognized as income in the period that includes the enactment date. A valuation allowance is established when necessary to reduce deferred tax assets to
the amount expected to be realized. Financial statement effects of uncertain tax positions are recognized when it is more-likely-than-not, based on the
technical merits of the position, that it will be sustained upon examination. Interest and penalties related to unrecognized tax benefits are included as a
component of other expense. To date, there have been no interest or penalties charged in relation to the unrecognized tax benefits.

F-12

 
The Company accounts for uncertain tax positions in accordance with ASC 740-10, Accounting for Uncertainty in Income Taxes. The Company
assesses all material positions taken in any income tax return, including all significant uncertain positions, in all tax years that are still subject to assessment
or challenge by relevant taxing authorities. Assessing an uncertain tax position begins with the initial determination of the position’s sustainability and is
measured at the largest amount of benefit that is greater than fifty percent likely of being realized upon ultimate settlement. As of each balance sheet date,
unresolved uncertain tax positions must be reassessed, and the Company will determine whether (i) the factors underlying the sustainability assertion have
changed and (ii) the amount of the recognized tax benefit is still appropriate. The recognition and measurement of tax benefits requires significant
judgment. Judgment concerning the recognition and measurement of a tax benefit might change as new information becomes available.

The Company includes any penalties and interest expense related to income taxes as a component of provision for income tax as necessary. To date,

there have been no interest or penalties charged in relation to the unrecognized tax benefits.

Net Loss Per Share

Basic net loss per share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding during the

period, without consideration for potentially dilutive securities. As discussed in Note 11, the unvested portion of early exercised stock options are excluded
from the computation of weighted average shares as the continuing vesting of such shares is contingent on the holders’ continued service to the Company.
Diluted net loss per share is the same as basic net loss per share for each period presented, since the effects of potentially dilutive securities are antidilutive
given the net loss of the Company.

Comprehensive Income (Loss)

Comprehensive loss includes net loss and certain changes in stockholders’ equity (deficit) that are excluded from net loss, primarily unrealized gains

or losses on the Company’s marketable securities.

Deferred Offering Costs

At December 31, 2018, the Company had $3.0 million of deferred offering costs included in other assets on the balance sheet, consisting of legal,

accounting and other fees and costs directly attributable to the IPO, which was completed in February 2019. The deferred offering costs were offset against
the gross proceeds of the IPO in February 2019.  

Emerging Growth Company Status

The Company is an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). Under the JOBS
Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such
time as those standards apply to private companies. The Company has elected to use this extended transition period for complying with new or revised
accounting standards that have different effective dates for public and private companies until the earlier of the date that the Company (i) is no longer an
emerging growth company or (ii) affirmatively and irrevocably opts out of the extended transition period provided in the JOBS Act. As a result, the
accompanying financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of public
company effective dates.

As described in “Recently Adopted Accounting Pronouncements” below, the Company early adopted ASU No. 2014-09, Revenue from Contracts

with Customers (Accounting Standards Codification Topic 606), ASU No. 2016-09, Stock Compensation—Improvements to Employee Share-Based
Payment Accounting, ASU No. 2018-07, Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment
Accounting, and ASU No. 2016-02, (Topic 842) Leases, as the JOBS Act does not preclude an emerging growth company from adopting a new or revised
accounting standard earlier than the time that such standard applies to private companies. The Company expects to use the extended transition period for
any other new or revised accounting standards during the period in which it remains an emerging growth company.

F-13

 
Recently Adopted Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-02 (Topic 842), Leases (“ASU 2016-02”). ASU

2016-02 requires an entity to recognize assets and liabilities arising from a lease for both financing and operating leases. ASU 2016-02 requires new
qualitative and quantitative disclosures to help investors and other financial statement users better understand the amount, timing, and uncertainty of cash
flows arising from leases. As a result of the Company having elected the extended transition period for complying with new or revised accounting
standards pursuant to Section 107(b) of the JOBS Act, ASU 2016-02 is effective for the Company for the year ending December 31, 2020 and all interim
periods thereafter. Effective January 1, 2019, the Company early adopted ASU No. 2016-02 using the alternative transition approach provided by ASU No.
2018-11. The Company elected certain practical expedients permitted under the transition guidance, including the election to carryforward historical lease
classification. The Company also elected the short-term lease practical expedient, which allowed the Company to not recognize leases with a term of less
than 12 months on the balance sheets. In addition, the Company elected the lease and non-lease components practical expedient, which allowed the
Company to calculate the present value of the fixed payments without performing an allocation of lease and non-lease components. Adoption of the new
standard resulted in recording operating lease right-of-use assets and operating lease liabilities of approximately $8.4 million and $15.1 million,
respectively, on the balance sheets as of January 1, 2019. The lease liabilities represent the present value of the remaining lease payments of the Company’s
Tizona Lease and Cove Lease (see Note 7), discounted using the Company’s incremental borrowing rate as of January 1, 2019. The corresponding right-of-
use lease assets are recorded based on the lease liabilities, adjusted for the unamortized lease incentives received and the cumulative difference between
rent expense and amounts paid under the Tizona Lease and Cove Lease. The adoption of ASU 2016-02 did not have a material impact on either the
statement of operations or statement of cash flows for the year ended December 31, 2019.

In February 2018, the FASB issued ASU No. 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of
Certain Tax Effects from Accumulated Other Comprehensive Income, which provided amended guidance to allow a reclassification from accumulated
other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (the “Tax Act”). The Company adopted
the new standard on January 1, 2019 and did not have income tax effects of the Tax Act related to unrealized gains and losses on its marketable
securities.  The adoption of this standard did not have an impact on the Company’s financial statements.

Recently Issued Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial
Instruments and subsequent amendments to the initial guidance: ASU 2018-19 and ASU 2019-04 (collectively, Topic 326). Topic 326 requires measurement
and recognition of expected credit losses for financial assets held. The amendments apply to entities which hold financial assets that are not accounted for
at fair value through net income as well as loans, debt securities, accounts receivables and any other financial assets not excluded from the scope that have
the contractual right to receive cash. Topic 326 requires entities to record expected credit losses for certain financial instruments, including available-for-
sale securities, as an allowance that reflect the entity’s current estimate of credit losses expected to be incurred. For available-for-sale debt securities in
unrealized loss positions, ASU 2016-13 requires allowances to be recorded instead of reducing the amortized cost of the investment. Under ASU 2019-10,
Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842): Effective Dates, the effective date for
ASU 2016-13 has been deferred for credit losses for SEC filers that are eligible as a smaller reporting company. As such, the amended effective date for
ASU 2016-13 is January 1, 2023. The Company is currently evaluating the effect of the adoption of this guidance on its financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure

Requirements for Fair Value Measurement, which modifies the disclosure requirements on fair value measurements. This guidance is effective for fiscal
years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company is currently evaluating
the effect the new guidance will have on its financial statements.

F-14

 
 
 
3.

Fair Value Measurement

The following table presents information about the Company’s financial assets that are measured at fair value and indicates the fair value hierarchy

of the valuation:

Assets
    Cash Equivalents:

   Money market funds
   U.S. government agency securities

    Short-term marketable securities
   U.S. government treasuries
   U.S. government securities
   Corporate debt securities
   U.S. government agency securities

    Long-term marketable securities
   Corporate debt securities
   U.S. government securities
   U.S. government agency securities

Fair Value Measurements at December 31, 2019

Total

Level 1

Level 2

Level 3

(in thousands)

  $

29,450 
7,597 

  $

29,450 
— 

  $

—    $

7,597   

— 
30,066 
15,552 
13,719 

1,508 
5,049 
499 
103,440 

— 
— 
— 
— 

— 
— 
— 
29,450 

  $

  $

—   
30,066   
15,552   
13,719   

1,508   
5,049   
499   
73,990    $

— 
— 

— 
— 
— 
— 

— 
— 
— 
— 

— 
—

Total cash equivalents and marketable securities

  $

Assets

Money market funds
Total cash equivalents

Fair Value Measurements at December 31, 2018

Total

Level 1

Level 2

Level 3

(in thousands)

  $
  $

60,396 
60,396 

  $
  $

60,396 
60,396 

  $
  $

—    $
—    $

The Company’s Level 2 securities are valued using third-party pricing sources. The pricing services utilize industry standard valuation models,

including both income- and market-based approaches, for which all significant inputs are observable, either directly or indirectly.

The Company has no Level 3 assets or liabilities as of December 31, 2019 or 2018. There were no transfers between Level 1 and Level 2 during the

years ended December 31, 2019 and 2018.

The Company did not have any financial liabilities subject to fair value measurements on a recurring basis as of December 31, 2019 and 2018.

F-15

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
    
 
  
 
 
  
   
  
   
    
 
  
 
 
   
   
 
 
 
  
   
  
   
    
 
  
 
 
   
   
 
 
 
   
   
 
 
 
   
   
 
 
 
   
   
 
 
 
  
   
  
   
    
 
  
 
 
   
   
 
 
 
   
   
 
 
 
   
   
 
 
 
 
 
   
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
    
 
  
 
 
 
4.

Available-for-Sale Securities

All marketable securities were considered available-for-sale at December 31, 2019. The amortized cost, gross unrealized holding gains or losses and

fair value of the Company’s marketable securities by major security type are summarized in the tables below:

Cash equivalents

U.S. government agency securities
Money market funds

Total cash equivalents
Short-term marketable securities:
U.S. government treasuries
U.S. government agency securities
U.S. government securities
Corporate debt securities

Total short-term marketable securities
Long-term marketable securities:

U.S. government agency securities
U.S. government securities
Corporate debt securities

Total long-term marketable securities
Total

December 31,
2019

  Amortized Cost  

Gross Unrealized
Gain

Gross Unrealized
Loss

Fair Value

(in thousands)

  $

  $

7,597 
29,450 
37,047 

— 
13,716 
30,072 
15,509 
59,297 

499 
5,045 
1,511 
7,055 
103,399 

  $

— 
— 
— 

— 
3 
— 
43 
46 

— 
4 
— 
4 
50 

  $

—    $
—   
— 

—   
—   
(6)  
—   
(6)  

—   
—   
(3)  
(3)  
(9)   $

7,597 
29,450 
37,047 

— 
13,719 
30,066 
15,552 
59,337 

499 
5,049 
1,508 
7,056 
103,440

As of December 31, 2019, some of the Company’s marketable securities were in an unrealized loss position. The Company determined that it did
have the ability and intent to hold all marketable securities that have been in a continuous loss position until maturity or recovery, thus there has been no
recognition of any other-than-temporary impairment in the year ended December 31, 2019. All marketable securities with unrealized losses at December
31, 2019 balance sheet date have been in a loss position for less than twelve months or the loss is not material.

All of the Company’s marketable securities have an effective maturity of less than two years.

5.

Balance Sheet Components

Property and Equipment, Net

Property and equipment, net consists of the following:

Laboratory equipment
Furniture and fixtures
Computer equipment and software
Leasehold improvements
Construction in progress

Less: Accumulated depreciation and amortization
Total property and equipment, net

2019

December 31,

(in thousands)

2018

  $

  $

3,757    $
576   
91   
8,873   
—   
13,297   
(1,914)  
11,383    $

2,402 
312 
32 
360 
906 
4,012 
(1,014)
2,998

Depreciation and amortization expense for property and equipment amounted to $1.6 million, $0.7 million and $0.4 million for the years ended

December 31, 2019, 2018, and 2017, respectively.

F-16

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
   
  
   
    
 
  
   
   
 
 
   
   
 
 
 
  
  
  
 
 
  
   
  
   
    
 
  
 
 
   
   
 
 
 
   
   
 
 
 
   
   
 
 
 
   
   
 
 
 
   
   
 
 
 
  
   
  
   
    
 
  
 
 
   
   
 
 
 
   
   
 
 
 
   
   
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Accrued Liabilities

Accrued liabilities consist of the following:

Accrued research and development
Accrued personnel costs
Accrued professional and consulting fees
Accrued offering costs
Other
Total accrued liabilities

6.

Convertible Notes

December 31,

2019

2018

  $

  $

3,893    $
2,575   
684   
—   
343   
7,495    $

504 
1,593 
333 
709 
202 
3,341

In May 2017, the outstanding principal balance of the Company’s convertible promissory notes issued in November 2016 (the “2016 Notes”) and

January 2017 (the “2017 Notes”), and the then-outstanding balance of accrued interest, converted into 811,103 shares of the Company’s Series B
convertible preferred stock in conjunction with the Series B preferred stock financing. The conversion of the 2016 Notes and the 2017 Notes into shares of
Series B convertible preferred stock was accounted for as an extinguishment. Upon the closing of the IPO, all shares of convertible preferred stock then
outstanding were automatically converted into shares of common stock.  The Company had no convertible preferred stock outstanding as of December 31,
2019.

Warrants Issued with 2016 and 2017 Notes

As of December 31, 2018, warrants for the purchase of an aggregate of 565,270 shares of the Company’s common stock were outstanding and

exercisable. In connection with the IPO, all of these warrants automatically net exercised at the IPO price of $14.00 per share, resulting in the issuance of
563,043 shares of common stock.

7.

Commitments and Contingencies

Leases

In February 2017, the Company entered into an operating lease agreement with Tizona Therapeutics, Inc. (“Tizona Lease”) for its headquarters in
South San Francisco, California. One member of the Board is also the Executive Chairman of Tizona and, as such, Tizona is deemed to be a related party.
The lease term was for 36 months. The lease agreement included escalation clauses for increased rent over the lease term. In addition to rental payments,
the lease required the Company to pay property taxes, insurance, maintenance and repair costs. Rent expense was recognized using the straight-line method
over the term of the lease. The Company recorded a deferred rent liability calculated as the difference between rent expense and cash rental payments.

In June 2019, the Company entered into a sublease termination agreement with Tizona (the “Termination Agreement”) with the purpose of

terminating the existing Tizona Lease. Under the Termination Agreement, the Company and Tizona agreed to terminate the obligations, liabilities and
benefits under the Tizona Lease as of the reduced lease term date of July 31, 2019. In addition, the Company paid a termination fee of $0.4 million to
Tizona in July of 2019. The Company is no longer a subtenant to Tizona under the Tizona Lease as of December 31, 2019. As such, there is no operating
lease liability or operating lease right-of-use asset balance related to this lease as of December 31, 2019.

In August 2018, the Company entered into a lease agreement for the office and laboratory space in South San Francisco, California (the “Cove
Lease”). The lease has an initial term of eight years, beginning on the lease commencement date, with an option to extend the lease for an additional period
of eight years. The lease commencement date was July 1, 2019 at which time the Company took occupancy. Pursuant to the terms of the lease, the
Company is entitled to a tenant improvement allowance of approximately $5.2 million with the option for an additional tenant improvement allowance of
approximately $1.4 million. The additional tenant improvement allowance of $1.4 million, which was exercised in December 2018, is treated as a loan
from the landlord and is expected to be paid back (including interest) by the Company through additional rental payments. As of December 31, 2019, the
full tenant improvement allowance of $6.6 million was utilized under this lease, which was recorded as leasehold improvements and a reduction to the
tenant improvement allowance receivable on the balance sheet.

F-17

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Cove Lease includes an option to renew, exercisable at the Company’s sole discretion, with a renewal term for an additional period of eight
years. As of December 31, 2019, the Company has not determined whether it will exercise its option to extend the lease term.  Therefore, the operating
lease assets and lease liabilities only contemplate the initial lease terms. The Cove Lease qualifies as an operating lease. The following table summarizes
the presentation in the Company’s condensed balance sheets of its operating lease (in thousands):

Assets:
   Operating lease right-of-use assets
Liabilities
   Operating lease liabilities
   Operating lease liabilities, net of current portion
     Total operating lease liabilities

As of December 31,
2019

  $

  $

  $

7,015 

1,217 
13,727 
14,944

The Company incurred $0.4 million, $0.2 million and $0.2 million in variable lease costs for each of the years ended December 31, 2019, 2018 and

2017, respectively.

Future minimum lease payments under the Cove Lease as of December 31, 2019 are as follows (in thousands):

As of December 31, 2019

2020
2021
2022
2023
2024
Thereafter
    Total  future minimum lease payments
Less: Present value adjustment for minimum lease commitments
Total

Operating Lease
Commitments

2,487 
2,566 
2,647 
2,731 
2,817 
7,433 
20,681 
(5,737)
14,944

  $

  $

As of December 31, 2019, the weighted average remaining lease term was 7.50 years and the weighted average incremental borrowing rate used to

determine the operating lease liability was 8.95%.

Rent expense was $2.5 million $1.2 million and $0.8 million for the years ended December 31, 2019, 2018 and 2017, respectively. Amortization of

the right-of-use lease assets was $1.2 million, zero and zero for the years ended December 31, 2019, 2018 and 2017, respectively.

Indemnification

In the ordinary course of business, the Company enters into agreements that may include indemnification provisions. Pursuant to such agreements,

the Company may indemnify, hold harmless and defend an indemnified party for losses suffered or incurred by the indemnified party. Some of the
provisions will limit losses to those arising from third-party actions. In some cases, the indemnification will continue after the termination of the agreement.
The maximum potential amount of future payments the Company could be required to make under these provisions is not determinable. The Company has
never incurred material costs to defend lawsuits or settle claims related to these indemnification provisions. The Company has also entered into
indemnification agreements with its directors and officers that may require the Company to indemnify its directors and officers against liabilities that may
arise by reason of their status or service as directors or officers to the fullest extent permitted by Delaware corporate law. The Company currently has
directors’ and officers’ insurance.

F-18

 
 
 
 
 
 
 
  
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
8.

Collaboration & License Agreements

Development and Option with AbbVie

On November 20, 2019, the Company entered into a Development and Option Agreement with AbbVie in connection with the Company’s HPN217

program, which targets B cell maturation antigen, BCMA. Pursuant to such agreement, the Company granted to AbbVie an option to a worldwide,
exclusive license under the Company’s patents and know-how applicable to the HPN217 program to develop, manufacture, and commercialize products
arising from the HPN217 program and targeting BCMA, or HPN217 Products. Under the Development and Option Agreement, the Company filed an IND
for HPN217, and will conduct clinical development activities pursuant to a mutually agreed development plan, including conducting a Phase 1/2 clinical
trial of HPN217, in order for AbbVie to determine whether it wishes to exercise its option to take a worldwide, exclusive license to such HPN217 program.

Under the Development and Option Agreement, AbbVie may exercise its license option at any time during a period commencing on the effective

date of the agreement and expiring after a specified period following delivery by the Company of a specified data package arising from the first Phase 1/2
trial for the HPN217 Product. Following AbbVie’s exercise of its option, and except for completion of certain development activities by the Company
under the development plan, AbbVie will be solely responsible, at its cost, for the development, manufacture and commercialization of HPN217 Products.
AbbVie is required to use commercially reasonable efforts to develop and obtain regulatory approval for one HPN217 Product, for at least one indication,
for use in each of the United States and specified European markets.

Upon execution of the Development and Option Agreement, the Company received an upfront payment of $30.0 million.  Additionally, AbbVie is

expected to pay a development milestone payment of up to $50.0 million as a result of dosing the first patient in the Phase 1/2 clinical trial of HPN217
within a specified time period, which the Company expects to occur in the first half of 2020.

If AbbVie exercises its option, AbbVie will pay the Company an option exercise fee of $200.0 million. Following option exercise, AbbVie will be
required to make further payments to the Company of up to $230.0 million in the aggregate for the achievement of specified development, regulatory and
commercial sales milestones for HPN217 Products. The Company will also receive tiered royalties on net sales by AbbVie, its affiliates and sublicensees of
HPN217 Products at percentages ranging from the high single digits to the very low double digits, subject to specified offsets and reductions. Royalties will
be payable under the Development and Option Agreement on a product-by-product and country-by-country basis commencing on the date of first
commercial sale of each HPN217 Product, and ending on the later of expiration of all valid claims of specified licensed patents in such country, expiration
of regulatory exclusivity in such country, or ten years following first commercial sale of such HPN217 Product in such country.

The Development and Option Agreement will terminate upon the date of the expiration of all AbbVie’s royalty payment obligations in all countries,

or upon expiration of the license option period and the failure of AbbVie to exercise its license option. The Development and Option Agreement may be
terminated by either party immediately for the insolvency of the other party or on 90 days’ written notice for an uncured material breach of the
Development and Option Agreement by the other party. AbbVie may also terminate the Development and Option Agreement in its entirety or on a country-
by-country basis for any reason on 90 days’ written notice to the Company.

The Company assessed the Development and Option Agreement in accordance with Topic 606 and concluded that AbbVie is a customer under this
agreement. The Company identified the following performance obligation at the inception of the Development and Option Agreement consisting of the
initial development activities.

The Company evaluated AbbVie’s option to obtain a worldwide exclusive license for HPN217 to determine whether it provides AbbVie with any
material rights. The Company concluded that the options were not issued at a significant and incremental discount, and therefore do not provide material
rights.  As such, the option is excluded as a performance obligation at the outset of the arrangement.  

At  the  inception  of  the  agreement,  the  transaction  price  included  the  $30.0  million  up-front  consideration  received  in  December  2019  and  a
development milestone of up to $50.0 million to be received upon dosing of the first patient in the HPN217 Phase 1/2 clinical trial within a specified time
period, for a total transaction price of $80.0 million. The Company has determined that achieving this milestone is probable such that a significant reversal
of cumulative revenue would not occur for the $50.0 million development milestone. The remaining development, commercialization, and sales milestones
along  with  sales-based  royalties  were  not  included  in  the  transaction  price,  as  these  milestone  amounts  were  fully  constrained  on  the  probability  of
achievement. The Company will reevaluate the transaction price at the end of each reporting period and as uncertain events are resolved or other changes in
circumstances occur, and, if necessary, adjust its estimate of the transaction price.

F-19

 
 
 
The transaction price of $80.0 million, was all allocated to a single unit of accounting. The initial development activities are considered a single unit
of accounting. The Company recognizes revenue associated with the performance obligation as the initial development activities are performed using an
input method, according to the costs incurred as related to the estimated costs for the development and regulatory activities to be performed through the
completion of a Phase 1/2 clinical trial of HPN217. The transfer of control occurs over this time period and, in management’s judgment, is the best measure
of progress towards satisfying the performance obligation. Such estimates are reviewed by the Company on a periodic basis and, if necessary, the Company
will adjust the measure of performance and related revenue recognition.

The Company recognized $1.7 million of revenue for the year ended December 31, 2019, of which $1.1 million was recognized as a contract asset,
included in prepaid expenses and other current assets on the balance sheet, related to the amount of revenue recognized prior to the receipt of the $50.0
million  development  milestone  noted  above.  As  of  December  31,  2019,  the  Company  has  recorded  $29.3  million  in  deferred  revenue,  of  which  $23.8
million is classified as long-term and $5.6 million as short-term deferred revenue, in the accompanying balance sheet.  

As of December 31, 2019, the Company will recognize royalty revenue in the period of sale of the related products, if any, based on the underlying

contract terms. No such amounts were recognized during the year ended December 31, 2019.

Amended and Restated Discovery Collaboration Agreement with AbbVie

On  November  20,  2019,  the  Company  entered  into  an  Amended  and  Restated  Discovery  Collaboration  and  License  Agreement,  or  the  Restated
Collaboration Agreement, with AbbVie, which agreement amends and restates the Discovery Collaboration and License Agreement entered into between
the  Company  and  AbbVie,  dated  October  10,  2017  and  amended  April  3,  2019,  or  the  Original  Collaboration  Agreement.    Pursuant  to  the  Original
Collaboration  Agreement,  the  Company  granted  to  AbbVie  worldwide  exclusive  rights  to  develop  and  commercialize  products  that  incorporate  our
proprietary TriTAC technology together with soluble TCRs provided by AbbVie that bind to targets accepted by the parties. Under the terms of the Original
Collaboration Agreement, AbbVie was allowed to designate up to two targets, which it selected in 2017 and 2019, respectively. Pursuant to the Restated
Collaboration Agreement, the worldwide, exclusive license granted to AbbVie under the Original Collaboration Agreement to develop and commercialize
products that incorporate our proprietary Tri-specific T-cell Activating Construct, or TriTAC, platform technology together with soluble T cell receptors, or
TCRs,  provided  by  AbbVie  has  been  expanded  to  cover  products  that  incorporate  antibodies  provided  by  AbbVie  or  by  us.  The  expansion  of  the
collaboration also allows AbbVie to designate up to six additional targets, selected during a specified period following the effective date, to be the subject
of activities under the collaboration. During a period of up to four years following the date of AbbVie’s designation of each target for the products, and
confirmation of target availability, the Company and AbbVie will conduct certain research and discovery activities under a mutually agreed discovery and
research plan in connection with the creation and evaluation of constructs comprising our proprietary TriTAC technology, in conjunction with the soluble
TCR  or  antibody  sequences  directed  at  the  agreed  upon  targets  of  interest.  The  Company  may  not,  including  through  any  third  party,  develop  or
commercialize any competing product that binds to any of the included targets. As was the case under the Original Collaboration Agreement, following the
discovery phase, AbbVie will be solely responsible, at its cost, for the development, manufacture and commercialization of the products that arise from the
activities under the discovery plan. AbbVie is required to use commercially reasonable efforts to develop and commercialize one such product directed to
each target for which the discovery activities were completed in each Major Market (as defined in the Restated Collaboration Agreement).

In addition to the upfront payment of $17 million already paid under the Original Collaboration Agreement, under the Restated Collaboration
Agreement, the Company received an upfront payment of $20 million for AbbVie’s right to select two additional targets and an option to select up to four
further targets. AbbVie will be required to make payments to the Company, upon target selection, of $10 million for each target, up to four further targets
selected by AbbVie. For each of the up to eight targets selected, the Company will receive up to $300 million in the aggregate for the achievement of
specified development, regulatory and commercial sales milestones for licensed products indicated for human therapeutic or prophylactic use, totaling up to
$2.4 billion in the aggregate, if such licensed products are successfully progressed against all-included targets and indications. The Company will also be
eligible to receive tiered royalties on net sales by AbbVie, its affiliates and sublicensees of licensed products at percentages in the mid-single digits, subject
to specified offsets and reductions. Royalties will be payable under the Restated Collaboration Agreement on a product-by-product and country-by-country
basis commencing on the date of first commercial sale of each product, and ending on the later of expiration of all valid claims of specified licensed patents
in such country, expiration of regulatory exclusivity in such country or ten years following first commercial sale of such product in such country.  If
licensed products are developed and commercialized for diagnostic or veterinary use, or certain screening or monitoring uses, the parties have agreed to
negotiate an appropriate reduction in the economic terms applicable to such non-therapeutic and prophylactic applications.

F-20

 
The Restated Collaboration Agreement will terminate upon the date of the expiration of all AbbVie’s royalty payment obligations in all
countries.  The Restated Collaboration Agreement may be terminated by either party immediately for the insolvency of the other party or on 90 days’
written notice for an uncured material breach of such agreement by the other party.  AbbVie may also terminate the Restated Collaboration Agreement in its
entirety or on a target-by-target or country-by-country basis for any reason on 30 days’ written notice to the Company. In addition, AbbVie may terminate
the Restated Collaboration Agreement immediately in its entirety or on a target-by-target basis if AbbVie considers in good faith that there has been a
failure of the discovery or development efforts with respect to such target, or that further development or commercialization of products directed to such
target is not advisable as a result of a serious safety issue.

The Company assessed the Collaboration and Restated Collaboration Agreement in accordance with Topic 606 and concluded that AbbVie is a

customer under both agreements. The Company concluded that there are multiple promises under both the Collaboration and Restated Collaboration
Agreement which include (1) research and development activities; (2) regulatory documentation and know-how; and (3) the license to the related
technology. The Company combined these promises into a single performance obligation, as the Company is obliged to render specialized services for the
research program, and other promises have either no significant value or are not distinct. The Company estimates that the $17.0 million upfront payment
under the Original Collaboration Agreement will be recognized over a period in which ongoing research and development activities are incurred based on
the projected activities to be performed over each reporting period relative to the total estimated performance period. Such estimates are reviewed by the
Company on a periodic basis and, if necessary, the Company will adjust the measure of performance and related revenue recognition.

At the inception of the Original Collaboration Agreement, the Company determined that the transaction price was $17.0 million, which was all

allocated to the two initial targets. The Company has evaluated the transaction price and has determined $17.0 million is still appropriate as of December
31, 2019.  For the year ended December 31, 2019 and 2018, $4.0 million and $4.3 million of revenue has been recognized in the accompanying statement
of operations and comprehensive loss, respectively.

At the inception of the Restated Collaboration Agreement, the Company determined that the transaction price included the $20.0 million upfront

payment received in December 2019.  The Company allocates $10.0 million to each additional target selected. The company estimates that the $20.0
million upfront payment under the Restated Collaboration Agreement will be recognized over a period in which ongoing research and development
activities are incurred based on the projected activities to be performed over each reporting period relative to the total estimated performance period. Such
estimates are reviewed by the Company on a periodic basis and, if necessary, the Company will adjust the measure of performance and related revenue
recognition. As of December 31, 2019, AbbVie has not yet selected a target under the Restated Collaboration Agreement, as such, no revenue was
recognized and the upfront payment of $20.0 million is recorded as deferred revenue as of December 31, 2019.

As of December 31, 2019, the Company has recorded $28.0 million in deferred revenue, of which $22.4 million is classified as long-term and $5.6

million as short-term deferred revenue, in the accompanying balance sheet.

The Company determined that future contingent payments that may be received related to development and regulatory milestones under the
Restated Collaboration Agreement are based on the performance of AbbVie and are constrained due to the fact that it was not probable that a significant
reversal of cumulative revenue would not occur, as their achievement is highly dependent on the successful completion of the research activities.
Accordingly, revenue for the achievement of these milestones will be recognized in the period that it is deemed probable that the milestone will be
achieved. Any consideration related to commercialization and sales milestones, and sales-based royalties will be recognized when the related sales occur as
they were determined to relate predominantly to the license granted to AbbVie and have been excluded from the transaction price. The Company will re-
evaluate the transaction price in each reporting period as uncertain events are resolved or other changes in circumstances occur.

As of December 31, 2019, the Company has not recognized or earned any milestone payments under the Original Collaboration and Restated
Collaboration Agreement. The Company will recognize royalty revenue in the period of sale of the related products, based on the underlying contract
terms. No such amounts were recognized during the year ended December 31, 2019.

License Agreement with Werewolf Therapeutics, Inc.

In March 2018, the Company entered into an assignment and license agreement (the “Werewolf Agreement”) with Werewolf Therapeutics, Inc.
(“Werewolf”). Werewolf is affiliated with a holder of more than 5% of the Company’s capital stock, and one member of the Board was, at the time, also the
interim Chief Executive Officer of Werewolf and as such, Werewolf was deemed to be a related party. Pursuant to the Werewolf Agreement, the Company
assigned certain patents and granted to Werewolf a non-exclusive, royalty-bearing, sublicensable license under certain other patents. In addition, Werewolf
assigned certain patents to the Company. Under the Werewolf Agreement, the Company received an upfront fee of $0.5 million. If Werewolf
commercializes products covered by the licensed patents, then beginning on the first sale of such products, the Company will be eligible to receive a
royalty on net sales of such products by Werewolf, its affiliates and licensees at a percentage in the low single digits, subject to a minimum annual royalty
payment at an amount in the low hundreds of thousands of dollars.

F-21

 
The Company assessed the Werewolf Agreement in accordance with Topic 606 and concluded that Werewolf is a customer, and there is only one

promise and a performance obligation to deliver intellectual property license. The upfront fee of $0.5 million was recognized upfront during the year ended
December 31, 2018 upon delivery of the license to Werewolf and royalties on net sales will be recognized when the underlying sales occur. 

On December 20, 2019, the Company and Werewolf amended the Werewolf Agreement by entering into a Second Amended and Restated

Assignment and License Agreement (the “Amended Werewolf Agreement”) to include the grant to Werewolf of an exclusive, royalty-bearing,
sublicensable license under certain patents owned by the Company and relating to certain proteins, to make, use, and commercialize products that are
covered by such patents in the field of molecules comprising a certain protein.  This license provides Werewolf with certain rights to enforce and defend
these licensed patents.  If Werewolf commercializes products covered by these licensed patents, then beginning on the first sale of such products, Werewolf
will be obligated to pay to the Company a royalty on net sales of such products by Werewolf, its affiliates and licensees at a percentage in the low single
digits, and this royalty cannot be added to any other royalty owed to the Company under the Amended Werewolf Agreement.  In addition, each party
granted to the other a non-exclusive, royalty-free, sublicensable, perpetual license under certain other patents relating to a certain binding domain of a
certain protein, to make, use, and commercialize products that are covered by such patents in a field defined by a certain type of molecule for each
party.  The Amended Werewolf Agreement also includes a mutual release of claims regarding certain patent prosecution matters.

No royalty revenue was recognized under the Werewolf Agreement during the year ended December 31, 2019 or 2018.

Collaboration and License Revenue

For the years ended December 31, 2019, 2018 and 2017, collaboration and license revenue in the accompanying statements of operations and

comprehensive loss is comprised of the following:

Collaboration and License Revenue
AbbVie Restated Collaboration Agreement
AbbVie Development and Option Agreement
Werewolf License Agreement

     Total collaboration and license revenue

9.

Convertible Preferred Stock

2019

2018

2017

$

$

 $

4,039 
1,738 
— 

 $

4,250 
— 
500 

5,777 

 $

4,750 

 $

708 
— 
— 

708

In May 2017, the Company entered into a Series B Preferred Stock Purchase Agreement (the “Series B Agreement”), pursuant to which the

Company issued 3,128,540 shares of its Series B convertible preferred stock at a purchase price of $6.39 per share for net proceeds of $19.7 million, of
which $7.5 million was sold to related party investors of the Company. In addition, as discussed in Note 6, the Company issued an aggregate of 811,103
shares of Series B convertible preferred stock upon the extinguishment of the 2016 Notes and the 2017 Notes in an aggregate of $5.2 million.

In November 2018, the Company entered into a Series C Preferred Stock Purchase Agreement, pursuant to which the Company issued and sold
approximately 6,499,935 million shares of its Series C convertible preferred stock at a purchase price of $10.77 per share for net proceeds of approximately
$69.7 million, of which approximately $29.0 million was sold to related party investors of the Company.

Convertible preferred stock consists of the following:

Series A
Series B
Series C

Shares
Authorized

  15,000,000  
  35,000,000  
  32,000,000  
  82,000,000  

F-22

As of December 31, 2018

Shares Issued  

Carrying
Value

and
Outstanding
(In thousands, except share data)
14,926
3,050,329  
44,906
7,068,184  
69,745
6,499,935  
129,577
    16,618,448  

  $

  $

Aggregate
Liquidation
Preference

  $

  $

15,008
45,166
70,004
130,178

 
 
 
 
   
 
   
 
 
 
 
 
  
  
 
 
  
  
 
 
 
 
 
 
 
 
 
   
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
   
   
 
   
 
 
   
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company classifies the convertible preferred stock outside of total stockholders’ deficit because, in the event of certain “liquidation events” that

are not solely within the control of the Company (including a merger, acquisition or sale of all or substantially all of the Company’s assets), the shares
would become redeemable at the option of the holders. The Company did not adjust the carrying values of the convertible preferred stock to the deemed
liquidation values of such shares since a liquidation event was not probable at either of the reporting dates. Subsequent adjustments to increase or decrease
the carrying values to the ultimate liquidation values will be made only if and when it becomes probable that such a liquidation event will occur.

On the completion of the IPO (see Note 1), all outstanding shares of convertible preferred stock were automatically converted into 16,618,448

shares of common stock. As of December 31, 2019, the Company did not have any convertible preferred stock issued or outstanding.

10.

Equity

Stock Incentive Plans

2019 Equity Incentive Plan

The board of directors adopted, and the Company’s stockholders approved the Company’s 2019 Equity Incentive Plan (the “2019 Plan”) in
January 2019, which became effective as of immediately prior to the execution of the underwriting agreement for the Company’s  IPO in February
2019, after which, no further grants were made under the Company’s 2015 Plan. Initially, the aggregate number of shares of our common stock that
may be issued pursuant to stock awards under our 2019 Plan is 5,656,381, which is the sum of (1) 2,200,000 shares plus (2) the number of shares
reserved, and remaining available for issuance, under our 2015 Plan at the time our 2019 Plan became effective and (3) the number of shares subject
to stock options or other stock awards granted under our 2015 Plan that would have otherwise returned to our 2015 Plan (such as upon the expiration
or termination of a stock award prior to vesting. The number of shares of our common stock reserved for issuance under our 2019 Plan will
automatically increase on January 1 of each year, beginning on January 1, 2020 and continuing through and including January 1, 2029, by 5% of the
total number of shares of our capital stock outstanding on December 31 of the preceding calendar year, or a lesser number of shares determined by
our board of directors. The maximum number of shares that may be issued upon the exercise of incentive stock options under our 2019 Plan is
8,000,000 shares.

2015 Equity Incentive Plan

In 2015, the Company adopted the 2015 Equity Incentive Plan (the “2015 Plan”). The 2015 Plan provided for the Company to sell or issue common

stock or restricted common stock, or to grant incentive stock options or nonqualified stock options for the purchase of common stock, to employees,
members of the Board and consultants of the Company under terms and provisions established by the Board. Under the terms of the 2015 Plan, options
may have been granted at an exercise price not less than fair market value. The Company generally grants stock-based awards with service conditions only.
Options granted typically vest over a four-year period but may be granted with different vesting terms. In January 2019, the Company’s board of directors
adopted and stockholders approved the Company’s 2019 Plan (noted above), which became effective immediately prior to the execution of the
underwriting agreement for the Company’s IPO in February 2019, at which point the 2015 Plan was terminated and no further grants were made under the
Company’s 2015 Plan. However, all outstanding stock awards granted pursuant to the 2015 Plan will continue to be subject to the terms and conditions as
set forth in the agreements evidencing such stock award.

F-23

 
 
 
Stock Option Activity

The following summarizes option activity under the 2019 Plan and the 2015 Plan:

Balance as of December 31, 2017
Options granted
Options exercised
Options cancelled
Balance as of December 31, 2018
Options granted
Options exercised
Options cancelled
Balance as of December 31, 2019

Vested and expected to vest as of December 31, 2019
Exercisable as of December 31, 2019

Number of
Outstanding
Options

Weighted
Average
Exercise
Price

1,791,299 
1,762,147 
(198,943)   
(30,515)   

3,323,988 
322,412 
(572,436)   
(88,864)   

2,985,100 

2,985,100 
881,790 

1.13 
2.06 
1.35 
1.29 
1.61 
13.21 
1.40 
1.89 
2.89 

2.89 
1.80 

Weighted
Average
Remaining
Contractual
Life
(in years)

Aggregate
Intrinsic
Value
(in thousands)

9.24 

881 

9.07 

1,675 

8.27 

8.27 
7.69 

35,509 

35,509 
11,456

As of December 31, 2019, 2,098,843 shares were reserved by the Company to grant under the 2019 Plan. The aggregate intrinsic values of

options outstanding, vested and exercisable, and vested and expected to vest were calculated as the difference between the exercise price of the
options and the estimated fair value of the Company’s common stock, as determined by the Board of Directors. The intrinsic value of options
exercised for the years ended December 31, 2019, 2018 and 2017 was $7.6 million, $0.1 million, and zero, respectively. There is no future tax benefit
related to options exercised, as the Company has accumulated net operating losses at December 31, 2019, 2018 and 2017.

During the years ended December 31, 2019, 2018 and 2017, the estimated weighted-average grant-date fair value of the employee options
vested was $0.97, $0.81, and $0.72 per share, respectively, and the estimated weighted-average grant-date fair value of employee options granted was
$9.26, $1.41, and $0.92 per share, respectively.

Stock-Based Compensation

The fair value of employee and director stock option awards was estimated at the date of grant using a Black-Scholes option-pricing model with the

following weighted-average assumptions:

Expected term (years)
Expected volatility
Risk-free interest rate
Expected dividend

2019
5.86
77.71%
2.17%
0%

Year Ended December 31,
2018
6.06
76.08%
2.89%
0%

2017
6.33
73.39%
2.03%
0%

Prior to our IPO in February 2019, and due to no public market for the Company’s common stock, the fair value of the shares of common stock

underlying stock options has historically been determined by the Board based on the fair value of the common stock at the time of grant of the option by
considering a number of objective and subjective factors including important developments in the Company’s operations, valuations performed by an
independent third party, sales of convertible preferred stock, actual operating results and financial performance, the conditions in the biotechnology
industry and the economy in general, the stock price performance and volatility of comparable public companies, and the lack of liquidity of the
Company’s common stock, among other factors. Subsequent to the completion of our IPO, the fair value of common stock underlying stock option is based
on the closing price of our common stock as reported on the date of grant on the primary stock exchange on which our common stock is traded.

F-24

 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
   
  
   
   
   
  
   
  
   
  
   
   
  
   
  
   
   
  
   
  
   
  
   
   
   
  
   
  
   
  
   
   
  
   
  
   
   
  
   
  
   
  
   
   
   
  
   
   
   
  
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
   
   
 
 
   
   
 
 
   
   
 
 
The Black-Scholes option-pricing model requires the use of highly subjective assumptions which determine the fair value of stock-based awards.

These assumptions include:

Expected Term—The expected term represents the period that stock-based awards are expected to be outstanding. The expected term for option
grants is determined using the simplified method. The simplified method deems the term to be the average of the time-to-vesting and the contractual
life of the stock-based awards.

Expected Volatility— The Company uses an average historical stock price volatility of comparable public companies within the biotechnology and
pharmaceutical industry that were deemed to be representative of future stock price trends as the Company does not have sufficient trading history
for its common stock. The Company will continue to apply this process until a sufficient amount of historical information regarding the volatility of
its own stock price becomes available.

Risk-Free Interest Rate—The risk-free interest rate is based on the U.S. Treasury zero coupon issues in effect at the time of grant for periods
corresponding with the expected term of option.

Expected Dividend—The Company has never paid dividends on its common stock and has no plans to pay dividends on its common stock.
Therefore, the Company used an expected dividend yield of zero.

Total stock-based compensation was as follows:

Research and development
General and administrative

Total stock-based compensation

2019

Year Ended December 31,
2018
(in thousands)

2017

  $

  $

656    $

1,415   
2,071    $

325    $
347   
672    $

145 
222 
367

Stock-based compensation related to non-employee awards, which is included in the table above, was $0.2 million, $0.1 million, and $0.1

million for the years ended December 31, 2019, 2018 and 2017, respectively.

In addition to the stock-based compensation expense showing in the above table, as of December 31, 2019, there is an additional $3.9 million of
unrecognized stock-based compensation related to unvested stock options that is expected to be recognized over a weighted-average period of 2.7 years.

2019 Employee Stock Purchase Plan

The board of directors adopted, and the Company’s stockholders approved, the 2019 Employee Stock Purchase Plan, (the “2019 ESPP”) in

January 2019.  The 2019 ESPP became effective in February 2019.

The initial reserve for purchase by participating employees under the 2019 ESPP an aggregate number of shares of common stock shall not

exceed 250,000 shares. The maximum aggregate number of shares of common stock that may be issued under the 2019 ESPP is 750,000 shares.
Additionally, the number of shares of common stock reserved for issuance under the 2019 ESPP will increase automatically each year, beginning on
January 1, 2020 and continuing through and including January 1, 2029, in an amount equal to the lesser of (i) 1% of the total number of shares of the
Registrant’s capital stock outstanding on December 31 of the preceding calendar year, (ii) 750,000 shares of Common Stock and (iii) a number of
shares of Common Stock designated by action of the Registrant’s board of directors prior to the first day of any calendar year. The board of directors
may act prior to the first day of any calendar year to provide that there will be no January 1 increase or that the increase will be for a lesser number of
shares than would otherwise occur. Shares subject to purchase rights granted under the 2019 ESPP that terminate without having been exercised in
full, the shares of Common Stock not purchased under such Purchase Right will again become available for issuance under the Plan.

An employee may not be granted rights to purchase stock under the 2019 ESPP if such employee (i) immediately after the grant would own

stock possessing 5% or more of the total combined voting power or value of all classes of stock of the Company or (ii) holds rights to purchase stock
under the 2019 ESPP that would accrue at a rate that exceeds $25,000 worth of our stock for each calendar year that the rights remain outstanding.

The administrator may approve offerings with a duration of not more than 27 months, and may specify one or more shorter purchase periods

within each offering. Each offering will have one or more purchase dates on which shares of common stock will be purchased for the employees who
are participating in the offering. The administrator, in its discretion, will determine the terms of offerings under the 2019 ESPP.

The 2019 ESPP permits participants to purchase shares of our common stock through payroll deductions with up to 15% of their earnings. The

purchase price of the shares will be not less than 85% of the lower of the fair market value of our common stock on the first day of an offering or on
the date of purchase.

F-25

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Expected term (years)
Expected volatility
Risk-free interest rate
Expected dividend

Restricted Stock

Year Ended December 31,
2019
0.5
64.23%
1.80%
0%

In 2015, the Company issued restricted stock awards to employees and directors under the 2015 Plan at a purchase price of $0.0005 per share. The

shares related to restricted stock awards are subject to a lapsing repurchase right upon termination of employment at the original purchase price. In order to
vest, the holders are required to provide continued service to the Company. For accounting purposes, unvested restricted stock awards are not considered
issued and outstanding and therefore are not reflected as issued and outstanding in the accompanying statements of convertible preferred stock and
stockholders’ equity (deficit) until the awards vest.

A summary of restricted stock activity is shown in the below table:

Restricted shares- December 31, 2017
Restricted stock awards vested
Unvested shares repurchased
Restricted shares- December 31, 2018
Restricted stock awards vested
Unvested shares repurchased
Restricted shares- December 31, 2019

Early Exercised Stock Options

Number of
of Restricted
Stock Outstanding

113,157 
(81,623)
(9,356)
22,178 
(22,178)
— 
—

The terms of the 2015 Plan permit option holders to exercise stock options before they are vested, subject to certain limitations. The shares

related to early exercised stock options are subject to our lapsing repurchase right upon termination of employment at the original purchase price. In
order to vest, the holders are required to provide continued service to the Company. The proceeds are initially recorded in other current liabilities and
are reclassified to common stock and paid-in capital as the repurchase right lapses. As of December 31, 2019 and 2018, there was $55,000 and
$188,000, respectively, recorded in other current liabilities relating to shares subject to repurchase. For accounting purposes, unvested early exercised
shares are not considered issued and outstanding until the awards vest. As a result of early exercises under the 2015 Plan, 56,211, and 149,565 shares
had not vested and were subject to repurchase as of December 31, 2019 and 2018, respectively.

Note Receivable from Stockholder

In August 2016, the Company received a recourse promissory note from our then CEO and President, in connection with this individual’s purchase

of 152,516 shares of our common stock at a price of $0.59 per share. The principal amount of the note was approximately $90,000, and accrued simple
interest at a rate of 1.22% per year. The note, along with accrued interest, can be prepaid without penalty and is due on the earlier of (i) August 29, 2022,
(ii) the pricing of an IPO or the closing of an acquisition of the Company, in either case if the note’s existence would violate any applicable law, (iii) the
date the Company determines that any change in the Company’s status or the individual’s status would cause the note to be deemed a prohibited extension
of credit under Section 402 of the Sarbanes-Oxley Act of 2002, as amended, or any applicable law or (iv) on demand by the Company in certain
circumstances. In 2016, upon the individual ceasing to be employed by the Company, the Company repurchased 105,067 shares of common stock at a price
per share of $0.59 per share for a total cash payment of $62,000. As of December 31, 2016 and 2017, the outstanding loan balance was $28,000, which is
recorded as a component of total stockholders’ deficit in the accompanying balance sheets. As of December 31, 2018 the outstanding balance of $28,000
was cancelled and the cancellation was recorded as stock-based compensation on the Company’s statement of operations and comprehensive loss.

F-26

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
11.

Income Taxes

Computed expected tax benefit (at federal statutory income tax rate of 21%)
State tax
Stock compensation
Tax credits
Change in valuation allowance
Other
Federal rate change (pursuant to the Tax Act)
Total provision for income taxes

$

$

(11,584)
(4,599)
(490)
587 
16,059 
27 
— 
— 

 $

 $

(5,747)
(2,686)
87 
1,802 
6,497 
47 
— 
—

December 31,

2019

2018

Since inception, the Company has only generated pretax losses. For the years ended December 31, 2019 and 2018, the Company recorded no
provision for income taxes due to the losses incurred. Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2019
and 2018 consisted of the following:

Deferred tax assets:
     Net operating loss carry forwards
     Stock-based compensation
     Deferred revenue
     Tax credits
     Lease liability
     Other
Total deferred tax assets
Less: valuation allowance
Net deferred tax assets
Fixed assets
Right-of-use asset
Net deferred tax assets

2019

December 31,

(in thousands)

2018

$

$

26,730   
368   
2,239   
—   
4,190   
674   
34,201   
(32,113)  
2,088   
(125)  
(1,963)  
—   

$

$

10,351 
91 
3,370 
— 
— 
469 
14,281 
(14,173)
108 
(108)
— 
—

The Company’s accounting for deferred taxes involves the evaluation of a number of factors concerning the realizability of its net deferred tax

assets. The Company primarily considered such factors as its history of operating losses, the nature of the Company’s deferred tax assets, and the timing,
likelihood and amount, if any, of future taxable income during the periods in which those temporary differences and carryforwards become deductible. At
present, the Company does not believe that it is more likely than not that the deferred tax assets will be realized; accordingly, a full valuation allowance has
been established and no deferred tax asset is shown in the accompanying balance sheets. The valuation allowance increased by approximately $17.9 million
and $6.5 million during the years ended December 31, 2019 and 2018.

The Company has net operating carryforwards for federal and California income tax purposes of approximately $190.9 million and $74.0 million as

of December 31, 2019 and 2018. The federal net operating loss carryforwards of $23.1 million, if not utilized, will expire beginning in 2035 and $72.5
million is carryforward indefinitely with the yearly net operating loss utilization limited to 80 percent of taxable income. The state net operating loss
carryforwards of $95.3 million, if not utilized, will expire beginning in 2035.

The Company has research and development credit carryforwards for federal and California income tax purposes of approximately $6.4 million and

$3.8 million as of December 31, 2019 and 2018.  The federal credit carryforwards of $3.9 million, if not utilized, will expire beginning in 2035. The state
credit carryforwards indefinitely.

Federal and California tax laws impose significant restrictions on the utilization of net operating loss carryforwards in the event of a change in
ownership of the Company, as defined by Internal Revenue Code Section 382 (“Section 382”). The Company believes a change in ownership, as defined by
Section 382, has occurred but a formal study has not been completed. In addition, in the future the Company may experience ownership changes, which
may limit the utilization of net operating loss carryforwards or other tax attributes.

F-27

 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company has not reflected any benefit of such net operating loss carryforwards in the accompanying financial statements. The Company has

established a full valuation allowance against its deferred tax assets due to the uncertainty surrounding the realization of such assets.

Uncertain Tax Benefits

The Company recognizes uncertain tax positions when it is more likely than not, based on the technical merits, that the position will not be sustained

upon examination. No liability related to uncertain tax positions is recorded on the financial statements related to uncertain tax positions.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

Unrecognized tax benefits at January 1
Additions for tax positions taken in the current year
Reductions for tax positions taken in the prior year
Unrecognized tax benefits at December 31

2019

$

$

3,438   
2,656   
(250)  
5,844   

$

$

December 31,

2018
(in thousands)

422   
3,016   
—   
3,438   

$

$

2017

197 
225 
— 
422

The Company does not anticipate any significant changes to unrecognized tax benefits over the next 12 months. The Company recognizes interest

and penalties related to uncertain tax positions in income tax expense. To the extent accrued interest and penalties do not ultimately become payable,
amounts accrued will be reduced and reflected as a reduction of the provision for income taxes in the period that such determination is made. Interest and
penalties have not been accrued for 2019, 2018 and 2017.

The Company files income tax returns in the United States and California. The years 2015 through 2019 remain open to U.S. federal and state
examination to the extent of the utilization of net operating loss and credit carryovers. As of December 31, 2019, the Company is not under examination by
the Internal Revenue Services or any state tax jurisdiction.

12.

Net Loss Per Share

The following outstanding potentially dilutive common stock equivalents have been excluded from the calculation of diluted net loss per share for

the periods presented due to their anti-dilutive effect:

Convertible preferred stock (as converted)
Common stock options issued and outstanding
ESPP shares issuable and outstanding
Restricted Stock subject to future vesting
Early exercised stock options subject to future vesting
Warrants to purchase shares of common stock
Total

2019

— 
2,985,100 
11,523 
— 
56,211 
— 
3,052,834 

As of December 31,
2018
16,618,448 
3,323,988 
— 
22,178 
149,565 
565,270 
20,679,449 

2017
6,989,973 
1,791,299 
— 
113,157 
132,180 
565,270 
9,591,879

The following table summarizes the computation of basic and diluted net loss per share attributable to common stockholders of the Company (in

thousands, except per share data):

Net loss

Weighted-average shares used to compute basic and diluted net loss per share  
Basic and diluted net loss per common share

2019

(55,572)

21,746,461 
(2.56)

As of December 31,

2018

(27,366)

1,066,877 
(25.65)

2017

(16,830)

894,901 
(18.81)

F-28

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
   
   
 
 
   
   
 
 
   
   
 
 
   
   
 
 
   
   
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
  
  
 
 
  
  
 
 
 
13. Quarterly Results (Unaudited)

The following table is in thousands, except per share amounts:

Statement of operations data:
Revenue
Collaboration and license revenue

Total revenue
Operating expenses
Research and development
General and administrative
Total operating expenses

Loss from operations
Interest income
Other expense
Net loss
Other comprehensive loss:
Net unrealized gain (loss) on marketable securities
Comprehensive loss

Net loss per share, basic and diluted

Weighted-average common shares used in computing net loss
    per share, basic and diluted

Statement of operations data:
Revenue
Collaboration and license revenue

Total revenue
Operating expenses
Research and development
General and administrative
Total operating expenses

Loss from operations
Interest income
Other expense
Net loss

Net loss per share, basic and diluted

Weighted-average common shares used in computing net loss
    per share, basic and diluted

March 31,
2019

June 30,
2019

September 30,
2019

December 31,
2019

Quarters Ended

1,063   
1,063   

9,382   
5,832   
15,214   
(14,151)  
576   
(4)  
(13,579)  

26   
(13,553)  

(1.01)  

$

$

$

1,063   
1,063   

$

1,417    $
1,417   

9,971   
3,734   
13,705   
(12,642)  
840   
(15)  
(11,817)  

84   
(11,733)  

(0.49)  

$

$

9,533   
8,493   
18,026   
(16,609)  
728   
(26)  
(15,907)   $

(25)  
(15,932)   $

(0.65)  

2,234 
2,234 

12,706 
4,333 
17,039 
(14,805)
532 
4 
(14,269)

(42)
(14,311)

(0.58)

13,475,222   

  24,294,211   

24,457,402   

24,606,894 

March 31,
2018

June 30,
2018

September 30,
2018

December 31,
2018

Quarters Ended

1,561   
1,561   

5,533   
982   
6,515   
(4,954)  
73   
(2)  
(4,883)  

(5.04)  

$

$

1,063   
1,063   

$

6,151   
967   
7,118   
(6,055)  
66   
(5)  
(5,994)  

(5.89)  

$

1,063    $
1,063   

5,967   
1,942   
7,909   
(6,846)  
108   
(22)  
(6,761)   $

(6.23)  

1,063 
1,063 

8,717 
2,215 
10,932 
(9,869)
148 
(8)
(9,729)

(8.15)

969,235   

1,017,336   

1,084,477   

1,193,797 

$

$

$

$

$

F-29

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
    
 
  
 
 
    
 
    
 
    
 
  
 
 
 
 
 
 
 
 
    
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
   
 
 
 
 
 
 
 
   
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
    
 
  
 
 
    
 
    
 
    
 
  
 
 
 
 
 
 
 
 
    
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
   
 
 
 
 
DESCRIPTION OF THE REGISTRANT’S SECURITIES
REGISTERED PURSUANT TO SECTION 12 OF THE
SECURITIES EXCHANGE ACT OF 1934

Exhibit 4.3

Harpoon Therapeutics, Inc. has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange
Act”): our common stock.  The following description of our common stock is a summary and does not purport to be complete. It is subject to and qualified
in its entirety by reference to our amended and restated certificate of incorporation, our amended and restated bylaws and our amended and restated
investors’ rights agreement, each of which are filed as exhibits to the Annual Report on Form 10-K, of which this exhibit is a part, and to the applicable
provisions of Delaware law. We encourage you to read our amended and restated certificate of incorporation, our amended and restated bylaws, our
amended and restated investors’ rights agreement and the applicable provisions of Delaware law for more information.

General

Our authorized capital stock consists of 160,000,000 shares, all with a par value of $0.0001 per share, of which 150,000,000 shares are designated as
common stock and 10,000,000 shares are designated as preferred stock.

Common Stock

Voting Rights

Each holder of common stock is entitled to one vote for each share on all matters submitted to a vote of our stockholders. The affirmative vote of holders of
at least 66 2/3% of the voting power of all of the then-outstanding shares of capital stock, voting as a single class, is required to amend certain provisions of
our amended and restated certificate of incorporation, including provisions relating to amending our amended and restated bylaws, the classified nature of
our board of directors, the size of our board of directors, the removal of members of our board of directors, the liability of members of our board of
directors, vacancies on our board of directors, special meetings of our board of directors and our stockholders, stockholder notices, actions by written
consent and exclusive jurisdiction.

Except as otherwise provided by statute or by applicable stock exchange rules, or by our amended and restated certificate of incorporation or our amended
and restated bylaws, in all matters other than the election of directors, the affirmative vote of the majority of voting power of the shares present in person,
by remote communication, if applicable, or represented by proxy at the meeting and entitled to vote generally on the subject matter shall be the act of the
stockholders. Except as otherwise provided by statute or by applicable stock exchange rules, or by our amended and restated certificate of incorporation or
our amended and restated bylaws, directors shall be elected by a plurality of the votes of the shares present in person, by remote communication, if
applicable, or represented by proxy at the meeting and entitled to vote generally on the election of directors.

Dividends

Subject to preferences that may apply to any outstanding shares of preferred stock, holders of common stock are entitled to receive ratably any dividends
that our board of directors may declare out of funds legally available for that purpose on a non-cumulative basis.

Liquidation

In the event of our liquidation, dissolution or winding up, holders of common stock will be entitled to share ratably in the net assets legally available for
distribution to stockholders after the payment of all of our debts and other liabilities, subject to the satisfaction of any liquidation preference granted to the
holders of any outstanding shares of preferred stock.

Rights and Preferences

Holders of common stock have no preemptive, conversion or subscription rights, and there are no redemption or sinking fund provisions applicable to our
common stock.

The rights, preferences and privileges of the holders of common stock are subject to, and may be adversely affected by, the rights of the holders of shares of
any series of preferred stock that we may designate and issue in the future. Our board of directors has the authority, without further action by our
stockholders, to issue up to 10,000,000 shares of preferred stock in one or more series, to establish from time to time the number of shares to be included in
each such series, to fix the rights, preferences and privileges of the shares of each wholly unissued series and any qualifications, limitations or restrictions
thereon, and to increase or decrease the number of shares of any such series, but not below the number of shares of such series then outstanding. Our board
of directors may authorize

 
 
the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the holders of common stock.
The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes, could, among other
things, have the effect of delaying, deferring or preventing a change in our control that may otherwise benefit holders of our common stock and may
adversely affect the market price of our common stock and the voting and other rights of the holders of common stock. We have no current plans to issue
any shares of preferred stock.

Stock Options

As of December 31, 2019, 2,985,100 shares of common stock were issuable upon the exercise of outstanding stock options at a weighted-average exercise
price of $2.89 per share.

Registration Rights

Certain holders of shares of our common stock are entitled to rights with respect to the registration of their shares under the Securities Act. The shares
subject to such registration rights are referred to as registrable securities. These registration rights are contained in our amended and restated investors’
rights agreement and are described in additional detail below.

The registration of shares of our common stock pursuant to the exercise of the registration rights described below would enable the holders to trade these
shares without restriction under the Securities Act when the applicable registration statement is declared effective. Generally, in an underwritten offering,
the managing underwriter, if any, has the right, subject to specified conditions, to limit the number of shares the holders of registrable securities may
include. 

Demand Registration Rights

The holders of at least 35% of the registrable securities outstanding may request that we register all or a portion of their registrable securities. Such request
for  registration  must  cover  shares  with  an  anticipated  aggregate  offering  price  of  at  least  $5.0  million.  We  will  not  be  required  to  effect  more  than  two
registrations on Form S-1 pursuant to these demand rights.

Piggyback Registration Rights

In  the  event  that  we  propose  to  register  any  of  our  securities  under  the  Securities  Act,  either  for  our  own  account  or  for  the  account  of  other  security
holders,  the  holders  of  registrable  securities  will  be  entitled  to  certain  piggyback  registration  rights  allowing  the  holders  to  include  their  shares  in  such
registration, subject to certain marketing and other limitations. As a result, whenever we propose to file a registration statement under the Securities Act,
other than with respect to a demand registration or a registration statement on Forms S-4 or S-8, the holders of registrable securities are entitled to notice of
the registration and have the right to include their registrable securities in the registration, subject to limitations that the underwriters may impose on the
number of shares included in the offering.

S-3 Registration Rights

The  holders  of  15%  of  the  registrable  securities  outstanding  can  make  a  request  that  we  register  their  shares  on  Form  S-3  if  we  are  qualified  to  file  a
registration statement on Form S-3 under the Securities Act. Such request for registration must cover shares with an anticipated aggregate offering price of
at least $1.0 million. We will not be required to effect more than two registrations on Form S-3 within any 12-month period.

Expenses of Registration

We  will  pay  the  expenses  of  the  holders  of  the  shares  registered  pursuant  to  the  registration  rights  described  above,  including  the  reasonable  fees  and
disbursements, not to exceed $30,000, of one counsel for the selling holders.

Termination of Registration Rights

The registration rights described above will terminate upon the earliest to occur of (i) February 12, 2022, which is the third anniversary of our initial public
offering; or (ii) with respect to any particular holder of registrable securities, at such time that such holder can sell its shares, under Rule 144 under the
Securities Act or otherwise, during any three-month period without registration.

Anti-Takeover Provisions of Delaware Law and Our Charter Documents

Section 203 of the Delaware General Corporation Law

We are subject to Section 203 of the DGCL, which prohibits a Delaware corporation from engaging in any business combination with any interested
stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

•

  before such date, the board of directors of the corporation approved either the business combination or the transaction that resulted in

the stockholder becoming an interested stockholder;

 
 
 
 
•

•

  upon completion of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder
owned at least 85% of the voting stock of the corporation outstanding at the time the transaction began, excluding for purposes of
determining the voting stock outstanding (but not the outstanding voting stock owned by the interested stockholder) those shares
owned (i) by persons who are directors and also officers and (ii) employee stock plans in which employee participants do not have the
right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or

  on or after such date, the business combination is approved by the board of directors and authorized at an annual or special meeting of
the stockholders, and not by written consent, by the affirmative vote of at least 66 2/3% of the outstanding voting stock that is not
owned by the interested stockholder.

In general, Section 203 defines a “business combination” to include the following:

•

•

•

•

•

  any merger or consolidation involving the corporation and the interested stockholder;

  any sale, transfer, pledge or other disposition of 10% or more of the assets of the corporation involving the interested stockholder;

  subject to certain exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation

to the interested stockholder;

  any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series of

the corporation beneficially owned by the interested stockholder; and

the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges or other financial benefits by or
through the corporation.

In general, Section 203 defines an “interested stockholder” as an entity or person who, together with such person’s affiliates and associates, beneficially
owns, or within three years prior to the time of determination of interested stockholder status did own, 15% or more of the outstanding voting stock of the
corporation.

Section 203 could prohibit or delay mergers or other takeover or change in control attempts and, accordingly, may discourage attempts to acquire us even
though such a transaction may offer our stockholders the opportunity to sell their stock at a price above the prevailing market price.

Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws

Among other things, our amended and restated certificate of incorporation and amended and restated bylaws:

•

  permit our board of directors to issue up to 10,000,000 shares of preferred stock, with any rights, preferences and privileges as they

may designate, including the right to approve an acquisition or other change in control;

•

•

•

•

•

•

•

  provide that the authorized number of members of our board of directors may be changed only by resolution of our board of directors;

  provide that our board of directors is classified into three classes of directors;

  provide that, subject to the rights of any series of preferred stock to elect members of our board of directors, such members may only
be removed for cause, which removal may be effected, subject to any limitation imposed by law, by the holders of at least a majority
of the voting power of all of our then-outstanding shares of the capital stock entitled to vote generally at an election of directors;

  provide that all vacancies, including newly created directorships, may, except as otherwise required by law, be filled by the affirmative

vote of a majority of directors then in office, even if less than a quorum;

  require that any action to be taken by our stockholders must be effected at a duly called annual or special stockholder meeting and not

be taken by written consent or electronic transmission;

  provide that stockholders seeking to present proposals before a stockholder meeting or to nominate candidates for election to our

board of directors at a stockholder meeting must provide advance notice in writing, and also specify requirements as to the form and
content of a stockholder’s notice;

  provide that special stockholder meetings may be called only by the Chairman of our board of directors, Chief Executive Officer or

President, or by our board of directors pursuant to a resolution adopted by a majority of the total number of authorized directors; and

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
•

  do not provide for cumulative voting rights, therefore allowing the holders of a plurality of the shares of common stock entitled to

vote in any election of directors to elect all of the directors standing for election, if they should so choose.

The amendment of any of these provisions requires approval by the holders of at least 66 2/3% of the voting power of all of our then-outstanding common
stock entitled to vote generally in the election of directors, voting together as a single class.

The combination of these provisions make it more difficult for our existing stockholders to replace our board of directors as well as for another party to
obtain control of us by replacing our board of directors. Because our board of directors has the power to retain and discharge our officers, these provisions
could also make it more difficult for existing stockholders or another party to effect a change in management. In addition, the authorization of undesignated
preferred stock makes it possible for our board of directors to issue preferred stock with voting or other rights or preferences that could impede the success
of any attempt to change our control.

These provisions are intended to enhance the likelihood of continued stability in the composition of our board of directors and its policies and to discourage
coercive takeover practices and inadequate takeover bids. These provisions are also designed to reduce our vulnerability to hostile takeovers and to
discourage certain tactics that may be used in proxy fights. However, such provisions could have the effect of discouraging others from making tender
offers for our shares and may have the effect of delaying changes in our control or management. As a consequence, these provisions may also inhibit
fluctuations in the market price of our stock that could result from actual or rumored takeover attempts. We believe that the benefits of these provisions,
including increased protection of our potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure our
company, outweigh the disadvantages of discouraging takeover proposals, because negotiation of takeover proposals could result in an improvement of
their terms.

Choice of Forum

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware (or, if and only if the Court of Chancery
of the State of Delaware lacks subject matter jurisdiction, any state court located within the State of Delaware or, if and only if all such state courts lack
subject matter jurisdiction, the federal district court for the District of Delaware), to the fullest extent permitted by applicable law, is the exclusive forum
for any derivative action or proceeding brought on our behalf, any action asserting a breach of fiduciary duty, any action asserting a claim against us arising
pursuant to the DGCL, our certificate of incorporation or our bylaws, or any action asserting a claim against us that is governed by the internal affairs
doctrine. However, this exclusive forum provision would not apply to suits brought to enforce a duty or liability created by the Exchange Act. Furthermore,
this provision applies to Securities Act claims and Section 22 of the Securities Act creates concurrent jurisdiction for federal and state courts over all suits
brought to enforce any duty or liability created by the Securities Act or the rules and regulations thereunder. Accordingly, there is uncertainty as to whether
a court would enforce such provision, and our stockholders will not be deemed to have waived our compliance with the federal securities laws and the rules
and regulations thereunder.

Listing

Our common stock is listed on the Nasdaq Global Select Market under the trading symbol “HARP.”

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Computershare Trust Company, N.A.

 
 
 
Confidential Execution Copy

Exhibit 10.17

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS BOTH NOT MATERIAL AND WOULD BE COMPETITIVELY HARMFUL IF
PUBLICLY DISCLOSED.

AMENDED AND RESTATED
DISCOVERY COLLABORATION AND LICENSE AGREEMENT

between

HARPOON THERAPEUTICS, INC.

and

ABBVIE BIOTECHNOLOGY LTD.

Dated as of 20 November, 2019

 
 
 
 
 
 
 
 
 
TABLE OF CONTENTS

DEFINITIONS1

TARGET NOMINATION [***]22

ARTICLE 1

ARTICLE 2

2.1

2.2

2.3

2.4

Target Nomination22

[***]25

[***]25

Effect of [***] or [***]26

ARTICLE 3

COLLABORATION MANAGEMENT26

3.1

3.2

3.3

3.4

3.5

Joint Research Committee26

General Provisions Applicable to the JRC27

Interactions Between a Committee and Internal Teams29

Working Groups29

Expenses29

ARTICLE 4

DEVELOPMENT AND REGULATORY29

4.1

4.2

4.3

4.4

4.5

4.6

4.7

Sequence Delivery29

Creation of Discovery Constructs30

Development of Discovery Constructs and Licensed Products31

Supply of Technology for Development Purposes32

Expenses and Invoicing33

Subcontracting33

Regulatory Matters33

ARTICLE 5

COMMERCIALIZATION35

5.1

5.2

5.3

5.4

5.5

In General35

Commercialization Diligence35

Booking of Sales; Distribution35

Product Trademarks36

Commercial Supply of Discovery Constructs or Licensed Products36

ARTICLE 6

GRANT OF RIGHTS36

6.1

6.2

6.3

6.4

Grants to AbbVie36

Grants to Harpoon37

Sublicenses38

Distributorships38

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6.5

6.6

6.7

6.8

6.9

Co-Promotion Rights38

Retention of Rights38

Confirmatory Patent License39

Exclusivity with Respect to the Territory39

In-License Agreements40

ARTICLE 7

PAYMENTS AND RECORDS40

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

7.10

7.11

7.12

7.13

7.14

7.15

7.16

Upfront Payment40

Development Milestones41

Regulatory Milestones42

Commercialization Milestones42

Sales-Based Milestones43

Royalties44

Royalty Payments and Reports46

Mode of Payment; Offsets46

Withholding Taxes46

Indirect Taxes47

Interest on Late Payments47

Audit48

Audit Dispute48

Confidentiality48

[***]48

No Other Compensation49

ARTICLE 8

INTELLECTUAL PROPERTY49

8.1

8.2

8.3

8.4

8.5

8.6

8.7

8.8

Ownership of Intellectual Property49

Maintenance and Prosecution of Patents50

Enforcement of Patents54

Infringement Claims by Third Parties56

Invalidity or Unenforceability Defenses or Actions57

Third Party Licenses58

Product Trademarks58

Inventor’s Remuneration59

- iii -

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
8.9

Common Interest59

ARTICLE 9

PHARMACOVIGILANCE AND SAFETY59

9.1

9.2

Pharmacovigilance59

Global Safety Database59

ARTICLE 10

CONFIDENTIALITY AND NON-DISCLOSURE60

10.1

10.2

10.3

10.4

10.5

10.6

10.7

10.8

Product Information60

Confidentiality Obligations60

Permitted Disclosures61

Use of Name63

Public Announcements63

Publications63

Return of Confidential Information63

Survival64

ARTICLE 11

REPRESENTATIONS AND WARRANTIES64

11.1

11.2

11.3

11.4

11.5

11.6

Mutual Representations and Warranties64

Additional Representations and Warranties of Harpoon65

Additional Representations and Warranties of AbbVie68

Covenants of Harpoon69

Covenants of AbbVie70

DISCLAIMER OF WARRANTIES70

ARTICLE 12

INDEMNITY70

12.1

12.2

12.3

12.4

12.5

12.6

ARTICLE 13

13.1

13.2

13.3

Indemnification of Harpoon70

Indemnification of AbbVie70

Notice of Claim71

Control of Defense71

Special, Indirect, and Other Losses73

Insurance73

Term74

TERM AND TERMINATION74

Termination for Material Breach74

Additional Termination Rights by AbbVie75

- iv -

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
13.4

13.5

13.6

13.7

13.8

13.9

Termination for Insolvency75

Rights in Bankruptcy76

Termination in Entirety76

Termination of Terminated Territory77

Termination of Accepted Target77

Remedies78

13.10

Accrued Rights; Surviving Obligations78

ARTICLE 14

MISCELLANEOUS79

14.1

14.2

14.3

14.4

14.5

14.6

14.7

14.8

14.9

Force Majeure79

Change in Control of Harpoon80

Export Control80

Assignment81

Severability81

Governing Law, Jurisdiction and Service81

Dispute Resolution82

Notices83

Entire Agreement; Amendments84

14.10

14.11

English Language84

Equitable Relief84

14.12 Waiver and Non-Exclusion of Remedies85

14.13

14.14

14.15

14.16

14.17

14.18

14.19

14.20

No Benefit to Third Parties85

Further Assurance85

Relationship of the Parties85

Performance by Affiliates85

Counterparts; Facsimile Execution85

References86

Schedules86

Construction86

SCHEDULES

Schedule 1.8

[***]

- v -

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Schedule 1.55
Schedule 1.57

Schedule 2.1.3
Schedule 4.6
Schedule 11.2.1
Schedule 14.7.3

Discovery Construct Success Criteria
Discovery Research Plan for TCR Sequences;
Discovery Research Plan for Discovery Antibody Sequences
Unavailable Targets as of the Amended Effective Date

Pre-Approved Third Party Providers

Existing Patents
Arbitration

 
 
 
 
 
AMENDED AND RESTATED
DISCOVERY COLLABORATION AND LICENSE AGREEMENT

This  Amended  and  Restated  Discovery  Collaboration  and  License  Agreement  (the  “Agreement”)  is  made
and  entered  into  effective  as  of  20  November,  2019  (the  “Amended Effective Date”)  by  and  between  Harpoon  Therapeutics,
Inc., a Delaware corporation (“Harpoon”), and AbbVie Biotechnology Ltd., a Bermuda corporation (“AbbVie”).  Harpoon and
AbbVie are sometimes referred to herein individually as a “Party” and collectively as the “Parties.”  

RECITALS

WHEREAS,  AbbVie  and  Harpoon  entered  into  that  certain  Discovery  Collaboration  and  License  Agreement  (the
“Original  Agreement”)  effective  as  of  October  10,  2017  (the  “Effective  Date”),  under  which  Harpoon  granted  a  license  to
AbbVie  under  certain  intellectual  property  rights  with  respect  to  the  development  of  T-Cell  Receptor  Constructs  (as  defined
therein) to develop and commercialize Licensed Products (as defined therein);

WHEREAS, the Original Agreement was amended by that certain First Amendment to the Discovery Collaboration

and License Agreement effective as of April 3, 2019; and

WHEREAS, the Parties now desire to amend and restate the Original Agreement, as amended, to, among other things,
(a) increase the number of additional targets which AbbVie has the right to nominate under the Agreement and (b) expand the
scope of the Agreement to cover Antibody Constructs, in each case, in accordance with the terms and conditions set forth below.

NOW, THEREFORE, in consideration of the premises and the mutual promises and conditions hereinafter set forth,
and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties, intending
to be legally bound, do hereby agree as follows:

ARTICLE 1
DEFINITIONS

Unless otherwise specifically provided herein, the following terms shall have the following meanings:

1.1

“AbbVie” has the meaning set forth in the preamble hereto.  

1.2

“AbbVie  Background  Know-How”  means  all  Information  that  is  (a)  not  generally  known,  (b)
developed or invented as a result of performing activities outside the scope of this Agreement, and (c) either (i) Controlled by
AbbVie or any of its Affiliates on the Effective Date or during the Term and reasonably necessary or useful for the Development,
Manufacture, or Commercialization of a Discovery T-Cell Receptor, Discovery T-Cell Receptor Construct or a Licensed Product
containing  or  comprising  a  Discovery  T-Cell  Receptor  Construct  or  (ii)  Controlled  by  AbbVie  or  any  of  its  Affiliates  on  the
Amended Effective Date or thereafter during the Term and reasonably necessary or useful for the Development, Manufacture, or
Commercialization of a Discovery Antibody, Discovery Antibody Construct or a Licensed Product containing or comprising a
Discovery Antibody Construct.  For clarity, AbbVie Background Know-How includes such Information Controlled by AbbVie
that is related to (1) a Discovery T-

 
 
 
Cell Receptor existing prior to the Effective Date or developed or invented thereafter as a result of performing activities outside
the scope of the activities contemplated by this Agreement or (2) a Discovery Antibody existing prior to the Amended Effective
Date or developed or invented thereafter as a result of performing activities outside the scope of the activities contemplated by
this  Agreement  and  in  each  case  (clauses  (1)  and  (2))  shall  exclude  such  Information  Controlled  by  AbbVie  that  is  related  to
TriTAC Constructs.

1.3

“AbbVie Background Patents” means all Patents that (a) (i) are Controlled by AbbVie or any of its
Affiliates on the Effective Date or during the Term and (ii) claim or cover AbbVie Background Know-How covered by clause (c)
(i) of Section 1.2 or (b) (i) are Controlled by AbbVie or any of its Affiliates on the Amended Effective Date or thereafter during
the Term and (ii) claim or cover AbbVie Background Know-How covered by clause (c)(ii) of Section 1.2.

1.4

“AbbVie  In-License  Agreement”  means  any  agreement  entered  into  during  the  Term  between
AbbVie and a Third Party under which payments by AbbVie or its Affiliates are required to Exploit any Discovery Construct or
Licensed Product, including any agreement entered into pursuant to Section 8.6, as such agreements may be amended from time-
to-time, but excluding any agreement granting or assigning any rights with respect to [***] or any [***] AbbVie or its Affiliates
or Sublicensees.

1.5

“AbbVie Indemnitees” has the meaning set forth in Section 12.2.

1.6

“AbbVie Program Know-How” means all Program Know-How to the extent (a) specifically related
to  (i)  a  Discovery  T-Cell  Receptor,  (ii)  a  Discovery  Antibody  or  (iii)  an  Accepted  Target  (including  [***]),  or  (b)  conceived,
discovered,  developed  or  otherwise  made  solely  by  or  on  behalf  of  AbbVie  or  its  Affiliates  except  to  the  extent  included  in
Sections 1.83(a) or 1.130.

How.

1.7

1.8

1.9

“AbbVie  Program  Patents”  means  Program  Patents  that  claim  or  cover  AbbVie  Program  Know-

[***] means the [***] set forth on [***].

“AbbVie Withholding Tax Action” has the meaning set forth in Section 7.9.2.

1.10

“Acceptance” means, with respect to a Drug Approval Application, receipt of written notice from
the  applicable  Regulatory  Authority  indicating  that  such  Drug  Approval  Application  has  been  accepted  for  filing  and  further
review.

1.11

1.12

“Accepted Target” has the meaning set forth in Section 2.1.5.

“Accepted Target Deliverables” has the meaning set forth in Section 4.2.

- 2 –

 
1.13

“Accounting Standards” means, with respect to a Party, that such Party shall maintain records and

books of accounts in accordance with United States Generally Accepted Accounting Principles.

1.14

“Acquisition” means, with respect to a Party, a merger, acquisition (whether of all of the stock or all
or substantially all of the assets of a Person or any operating or business division of a Person) or similar transaction by or with the
Party, other than a Change in Control of the Party.

1.15

“Adverse Ruling” has the meaning set forth in Section 13.2.1.

1.16

“Affiliate” means, with respect to a Party, any Person that, directly or indirectly, through one (1) or
more  intermediaries,  controls,  is  controlled  by  or  is  under  common  control  with  such  Party.    For  purposes  of  this  definition,
“control” and, with correlative meanings, the terms “controlled by” and “under common control with” means (a) the possession,
directly or indirectly, of the power to direct the management or policies of a Person, whether through the ownership of voting
securities, by contract relating to voting rights or corporate governance, or otherwise; or (b) the ownership, directly or indirectly,
of  more  than  fifty  percent  (50%)  of  the  voting  securities  or  other  ownership  interest  of  a  Person  (or,  with  respect  to  a  limited
partnership or other similar entity, its general partner or controlling entity).  The Parties acknowledge that in the case of certain
entities organized under the laws of certain countries outside of the United States, the maximum percentage ownership permitted
by  law  for  a  foreign  investor  may  be  less  than  fifty  percent  (50%),  and  that  in  such  case  such  lower  percentage  shall  be
substituted in the preceding sentence, provided that such foreign investor has the power to direct the management or policies of
such entity.

hereto.

1.17

1.18

1.19

1.20

1.21

1.22

1.23

“Agreement” has the meaning set forth in the preamble hereto.

“Alliance Manager” has the meaning set forth in Section 3.2.5.

“Amended Effective Date” means the effective date of this Agreement as set forth in the preamble

“Antibody” means an immunoglobulin molecule [***].

“Antibody Construct” means a TriTAC Construct [***].  

“Antibody Discovery Research Plan” has the meaning set forth in Section 1.57.2.

“Antibody Sequence Information” has the meaning set forth in Section 4.1.

1.24

“Applicable Law” means federal, state, local, national and supra-national laws, statutes, rules, and
regulations,  including  any  rules,  regulations,  guidelines,  or  other  requirements  of  the  Regulatory  Authorities,  major  national
securities exchanges or major securities listing

- 3 –

 
organizations, that may be in effect from time to time during the Term and applicable to a particular activity or country or other
jurisdiction hereunder.

1.25

1.26

1.27

“Audit Expert” has the meaning set forth in Section 7.13.

“Bankruptcy Code” has the meaning set forth in Section 13.5.1.

“Binds”  means,  with  respect  to  a  first  moiety  that  binds  to  a  second  moiety,  having  a  binding

affinity between the first moiety and second moiety that is [***].  

1.28

1.29

“Biosimilar Application” has the meaning set forth in Section 8.3.3.

“Biosimilar Competition” has the meaning set forth in Section 7.6.3.

1.30

“Biosimilar Product” means, with respect to a particular Discovery Construct or Licensed Product
in  a  particular  country,  a  biologic  product  that  is  substantially  similar  to  or  interchangeable  with  such  Discovery  Construct  or
Licensed  Product  and  any  related  formulations  thereof,  so  as  to  permit  the  biosimilar  applicant  to  rely  for  approval  by  the
applicable  Regulatory  Authority  on  such  Discovery  Construct  or  Licensed  Product  as  the  reference  product,  or  otherwise
reference  such  Discovery  Construct  or  Licensed  Product  for  approval  by  the  applicable  Regulatory  Authority.  A  Licensed
Product  licensed,  marketed,  sold,  manufactured  or  produced  by  AbbVie  or  its  Affiliates  or  Sublicensees  will  not  constitute  a
Biosimilar Product.

1.31

1.32

1.33

1.34

“BLA” has the meaning set forth in the definition of “Drug Approval Application.”

“Board of Directors” has the meaning set forth in the definition of “Change in Control.”

“Breaching Party” has the meaning set forth in Section 13.2.1.

“Business Day” means a day other than a Saturday or Sunday on which banking institutions in New

York, New York are open for business.

1.35

“Calendar Quarter”  means  each  successive  period  of  three  (3)  calendar  months  commencing  on
January 1, April 1, July 1 and October 1, except that the first Calendar Quarter of the Term shall commence on the Effective Date
and end on the day immediately prior to the first to occur of January 1, April 1, July 1 or October 1 after the Effective Date, and
the last Calendar Quarter shall end on the last day of the Term.

1.36

“Calendar  Year”  means  each  successive  period  of  twelve  (12)  calendar  months  commencing  on
January 1 and ending on December 31, except that the first Calendar Year of the Term shall commence on the Effective Date and
end on December 31 of the year in which the Effective Date occurs and the last Calendar Year of the Term shall commence on
January 1 of the year in which the Term ends and end on the last day of the Term.

1.37

“Change  in  Control”  with  respect  to  a  Party,  shall  be  deemed  to  have  occurred  if  any  of  the

following occurs after the Effective Date: 

- 4 –

 
1.37.1

any  “person”  or  “group”  (as  such  terms  are  defined  below)  (a)  is  or  becomes  the  “beneficial
owner” (as defined below), directly or indirectly, of shares of capital stock or other interests (including partnership interests) of
such Party then outstanding and normally entitled (without regard to the occurrence of any contingency) to vote in the election of
the directors, managers or similar supervisory positions (“Voting Stock”) of such Party representing fifty percent (50%) or more
of the total voting power of all outstanding classes of Voting Stock of such Party or (b) has the power, directly or indirectly, to
elect a majority of the members of the Party’s board of directors, or similar governing body (“Board of Directors”), excluding in
each case (clauses (a) and (b)) [***]; or

1.37.2

such  Party  enters  into  a  merger,  consolidation  or  similar  transaction  with  another  Person
(whether  or  not  such  Party  is  the  surviving  entity)  and  as  a  result  of  such  merger,  consolidation  or  similar  transaction  (a)  the
members  of  the  Board  of  Directors  of  such  Party  immediately  prior  to  such  transaction  constitute  less  than  a  majority  of  the
members  of  the  Board  of  Directors  of  such  Party  or  such  surviving  Person  immediately  following  such  transaction  or  (b)  the
Persons  that  beneficially  owned,  directly  or  indirectly,  the  shares  of  Voting  Stock  of  such  Party  immediately  prior  to  such
transaction cease to beneficially own, directly or indirectly, shares of Voting Stock of such Party representing at least a majority
of the total voting power of all outstanding classes of Voting Stock of the surviving Person in substantially the same proportions
as their ownership of Voting Stock of such Party immediately prior to such transaction; or

properties or assets representing all or substantially all of such Party’s assets to which this Agreement relates; or

1.37.3

such  Party  sells  or  transfers  to  any  Third  Party,  in  one  (1)  or  more  related  transactions,

1.37.4
dissolution of such Party.  

the  holders  of  capital  stock  of  such  Party  approve  a  plan  or  proposal  for  the  liquidation  or

For  the  purpose  of  this  definition  of  Change  in  Control,  (a)  “person”  and  “group”  have  the  meanings  given  such  terms  under
Section 13(d) and 14(d) of the United States Securities Exchange Act of 1934 and the term “group” includes any group acting for
the  purpose  of  acquiring,  holding  or  disposing  of  securities  within  the  meaning  of  Rule  13d-5(b)(1)  under  the  said  Act;  (b)  a
“beneficial owner” shall be determined in accordance with Rule 13d-3 under the aforesaid Act; and (c) the terms “beneficially
owned” and “beneficially own” shall have meanings correlative to that of “beneficial owner.”

1.38

“Clinical Data” means all Information with respect to any Discovery Construct or Licensed Product
and made, collected, or otherwise generated under or in connection with Clinical Studies, including any data (including raw data),
reports, and results with respect thereto.

1.39

“Clinical  Studies”  means  a  First-in-Human  Clinical  Trial,  Non-Pivotal  Human  Clinical  Trial,
Pivotal  Human  Clinical  Trial,  and  such  other  tests  and  studies  in  human  subjects  that  are  required  by  Applicable  Law,  or
otherwise recommended by the Regulatory Authorities, to obtain or maintain Regulatory Approvals for a Licensed Product for
one (1) or more indications, including tests or studies that are intended to expand the Product Labeling for such Licensed Product
with respect to such indication.

- 5 –

 
1.40

“Combination Product” means a Licensed Product that is: (a) sold in the form of a combination
product  containing  both  a  Discovery  Construct  and  one  (1)  or  more  independently  therapeutically  active  pharmaceutical  or
biologic  products;  or  (b)  sold  in  a  form  that  contains  (or  is  sold  bundled  with)  any  (i)  diagnostic  product,  process,  service  or
therapy  or  (ii)  product,  process,  service  or  therapy  that  is  administered  separately  from  the  Licensed  Product,  in  both  cases
(clauses (a) and (b)) sold as a unit at a single price and excluding any Delivery System.

1.41

“Commercialization” means any and all activities directed to the preparation for sale of, offering
for  sale  of,  or  sale  of  a  Discovery  Construct  or  Licensed  Product,  including  activities  related  to  marketing,  promoting,
distributing, importing and exporting such Discovery Construct or Licensed Product, and interacting with Regulatory Authorities
regarding  any  of  the  foregoing.    When  used  as  a  verb,  “to  Commercialize”  and  “Commercializing”  means  to  engage  in
Commercialization, and “Commercialized” has a corresponding meaning.

1.42

1.43

“Commercially Reasonable Efforts” means, with respect to the [***].

“Competing Product” means any pharmaceutical or biologic product, process, service or therapy

that Binds to any Accepted Target for any Indication.

1.44

“Competitor” means (a) any Person that [***]; and (b) any Person that [***] with respect to any

Competing Product.

1.45

“Confidential Information”  means  any  Information  provided  orally,  visually,  in  writing  or  other
form  by  or  on  behalf  of  one  (1)  Party  (or  an  Affiliate  or  representative  of  such  Party)  to  the  other  Party  (or  to  an  Affiliate  or
representative of such other Party) in connection with this Agreement, whether prior to, on, or after the Effective Date, including
Information relating to the terms of this Agreement, the Discovery Construct or any Licensed Product (including the Regulatory
Documentation and regulatory data), any Exploitation of any Discovery Construct or 

- 6 –

 
any Licensed Product, any Novel Target, any know-how with respect thereto developed by or on behalf of the disclosing Party or
its Affiliates, or the scientific, regulatory or business affairs or other activities of either Party.  Notwithstanding the foregoing,
(a)  Joint  Program  Know-How  shall  be  deemed  to  be  the  Confidential  Information  of  both  Parties,  and  both  Parties  shall  be
deemed to be the receiving Party and the disclosing Party with respect thereto, and (b) all Regulatory Documentation owned by
AbbVie pursuant to Section 4.7.1 shall be deemed to be the Confidential Information of AbbVie, and AbbVie shall be deemed to
be the disclosing Party and Harpoon shall be deemed to be the receiving Party with respect thereto.  In addition, all information
disclosed by Harpoon to AbbVie under the [***], (the “Prior NDA”) shall be deemed to be Harpoon’s Confidential Information
disclosed  hereunder,  and  all  information  disclosed  by  AbbVie  Inc.  to  Harpoon  under  the  Prior  NDA  shall  be  deemed  to  be
AbbVie’s Confidential Information disclosed hereunder.

1.46

“Control”  means,  with  respect  to  any  item  of  Information,  Regulatory  Documentation,  material,
Patent,  or  other  property  right,  the  possession  of  the  right,  whether  directly  or  indirectly,  and  whether  by  ownership,  license,
covenant not to sue or otherwise (other than by operation of the license and other grants in Sections 6.1 or 6.2), to grant a license,
sublicense or other right (including the right to reference Regulatory Documentation) to or under such Information, Regulatory
Documentation, material, Patent, or other property right as provided for herein without violating the terms of any agreement or
other arrangement with any Third Party.

1.47

1.48

“Default Notice” has the meaning set forth in Section 13.2.1.

“Delivery System” has the meaning set forth in the definition of “Net Sales.”

1.49

“Development” means all activities related to research, pre-clinical and other non-clinical testing,
test  method  development  and  stability  testing,  toxicology,  formulation,  process  development,  manufacturing  scale-up,
qualification  and  validation,  quality  assurance/quality  control,  Clinical  Studies,  including  Manufacturing  in  support  thereof,
statistical  analysis  and  report  writing,  the  preparation  and  submission  of  Drug  Approval  Applications,  regulatory  affairs  with
respect to the foregoing and all other activities necessary or reasonably useful or otherwise requested or required by a Regulatory
Authority  as  a  condition  or  in  support  of  obtaining  or  maintaining  a  Regulatory  Approval.    When  used  as  a  verb,  “Develop”
means to engage in Development.  For purposes of clarity, Development shall include any submissions and activities required in
support thereof, required  by  Applicable  Laws  or  a  Regulatory  Authority  as  a  condition or in support of obtaining a pricing or
reimbursement approval for an approved Licensed Product.

1.50

“Discovery Antibody” has the meaning set forth in Section 4.1.

1.51
Discovery Antibody.  

1.52
Construct, as applicable.

“Discovery  Antibody  Construct”  means  an  Antibody  Construct  comprising  or  incorporating  a

“Discovery  Construct”  means  a  Discovery  T-Cell  Receptor  Construct  or  Discovery  Antibody

- 7 –

 
1.53

“Discovery  Construct  Delivery  Deadline”  means,  on  an  Accepted  Target-by-Accepted  Target
basis,  the  date  that  is  [***]  after  the  date  on  which  AbbVie  delivers  to  Harpoon  the  TCR  Sequence  Information  or  Antibody
Sequence Information, as applicable, pursuant to Section 4.1.  

1.54

“Discovery  Construct  Failure”  means,  with  respect  to  a  Licensed  Product,  that,  due  to  Clinical
Study results or actions taken by any Regulatory Authority after the Effective Date, [***] determines[***] that it is unlikely that
[***] obtain Regulatory Approval of such Licensed Product [***] or, [***] it is unlikely that [***]in each case without including
in the[***].

1.55

“Discovery  Construct  Success  Criteria”  means  the  success  criteria  with  respect  to  a  Discovery

Construct set forth on Schedule 1.55.

1.56

“Discovery  Research  Activities”  means  the  Development  activities  set  forth  in  the  Discovery

Research Plan to be performed by Harpoon (or, by or on behalf of AbbVie pursuant to Section 4.2).

1.57

“Discovery Research Plan” means, as applicable:

the  research  plan  setting  forth  the  activities  (and  estimated  timelines)  for  [***],  such  plan
attached  as  Schedule  1.57  and  identified  as  “Discovery  Research  Plan  for  Discovery  TCR  Sequences,”  as  the  same  may  be
amended from time to time in accordance with the terms hereof (the “TCR Discovery Research Plan”); or

1.57.1

the  research  plan  setting  forth  the  activities  (and  estimated  timelines)  for  [***]  such  plans
attached as Schedule 1.57 and identified as “Discovery Research Plan for Discovery Antibody Sequences,” as the same may be
amended from time to time in accordance with the terms hereof (the “Antibody Discovery Research Plan”).  

1.57.2

1.58

1.59

“Discovery T-Cell Receptor” has the meaning set forth in Section 4.1.

“Discovery  T-Cell  Receptor  Construct”  means  a  T-Cell  Receptor  Construct  comprising  or

incorporating a Discovery T-Cell Receptor.

1.60

1.61

“Dispute” has the meaning set forth in Section 14.7.

“Distributor” has the meaning set forth in Section 6.4.

- 8 –

 
1.62

“Divestiture” means, with respect to a Party, (a) the divestiture [***] through [***] or [***]  with
respect to such [***] (for clarity, the [***] in connection with a [***]of such[***] for any such divestiture) or (b) [***].  When
used as a verb, “Divest” and “Divested” means to cause a Divestiture.

1.63

“Dollars” or “$” means United States Dollars.

1.64

“Drug Approval Application” means a Biologics License Application (a “BLA”) as defined in the
FFDCA, or any corresponding foreign application in the Territory, including, with respect to the European Union, a Marketing
Authorization Application (a “MAA”) filed with the EMA or with the applicable Regulatory Authority of a country in Europe
with respect to the mutual recognition or any other national approval procedure.

hereto.

1.65

1.66

“Effective  Date”  means  the  effective  date  of  the  Original  Agreement  as  set  forth  in  the  recitals

“EMA” means the European Medicines Agency and any successor agency(ies) or authority having

substantially the same function.

1.67

1.68

“European Major Market” means each of the [***].

“Existing Patents” has the meaning set forth in Section 11.2.1.

1.69

“Exploit” or “Exploitation” means to make, have made, import, export, use, have used, sell, have
sold,  or  offer  for  sale,  including  to  Develop,  Commercialize,  register,  modify,  enhance,  improve,  Manufacture,  have
Manufactured, hold, or keep (whether for disposal or otherwise), or otherwise dispose of.

1.70

“FDA” means  the  United  States  Food  and  Drug  Administration  and  any  successor  agency(ies)  or

authority having substantially the same function.

1.71

“FFDCA” means the United States Federal Food, Drug, and Cosmetic Act, 21 U.S.C. § 301 et seq.,
as  amended  from  time  to  time,  together  with  any  rules,  regulations  and  requirements  promulgated  thereunder  (including  all
additions, supplements, extensions, and modifications thereto).

1.72

“Field” means all human and non-human diagnostic, prophylactic, and therapeutic uses.

- 9 –

 
1.73

“First Commercial Sale” means, with respect to a Licensed Product and a country, the first sale for
monetary value for use or consumption by the end user of such Licensed Product in such country after Regulatory Approval for
such Licensed Product has been obtained in such country.  [***] shall not be construed as a First Commercial Sale.

1.74

“First-in-Human Clinical Trial” means the first-ever human clinical trial in any country conducted
in  accordance  with  good  clinical  practices  (as  defined  under  Applicable  Law)  that  is  intended  to  initially  evaluate  a  Licensed
Product  with  respect  to  safety,  tolerability,  pharmacological  effects  and  determination  of  maximum  tolerated  dose  or
recommended  dose  of  such  Licensed  Product  for  subsequent  human  clinical  trials  as  the  primary  endpoint,  or  that  would
otherwise satisfy requirements of 21 CFR 312.21(a), or its foreign equivalent. Such trials may include but are not limited to dose
range exploration, pharmacokinetics studies, mechanistic and pharmacodynamics studies, drug-drug-interaction and food effect
studies,  assessment  of  pharmacokinetics  in  renal  or  hepatic  impairment  patients,  and  initial  evaluation  of  combinations  of  a
Licensed Product with other drugs or drug candidates.

1.75

1.76

[***] has the meaning set forth in [***].  

“General  Harpoon  Sequence  Information”  means  Harpoon  Sequence  Information  that  is  not

Product-Specific Harpoon Sequence Information.

1.77

“Harpoon” has the meaning set forth in the preamble hereto.

1.78

“Harpoon  Background  Know-How”  means  all  Information  that  is  (a)  not  generally  known,  (b)
developed or invented as a result of performing activities outside the scope of this Agreement, and (c) either (i) Controlled by
Harpoon or any of its Affiliates on the Effective Date or during the Term and reasonably necessary or useful for [***]For the
purposes of clarity, Harpoon Background Know-How shall exclude such Information Controlled by Harpoon that is related to the
Discovery T-Cell Receptors and Discovery Antibodies.

1.79

“Harpoon Background Patents” means all Patents that (a) (i) are Controlled by Harpoon or any of

its Affiliates on the Effective Date or during the Term and (ii) claim or cover [***] or (b) (i) [***]and (ii) [***].

1.80

1.81

“Harpoon In-License Agreement” has the meaning set forth in Section 11.2.3.

“Harpoon Indemnitees” has the meaning set forth in Section 12.1.

- 10 –

 
1.82

“Harpoon Platform” means Information, Patents and other intellectual property rights that are: (a)

Controlled by Harpoon or any of its Affiliates on the Effective Date or during the Term and (b) [***] and (ii) [***].

For the purposes of clarity, Harpoon Platform or any component of the Harpoon Platform does not include Information, Patents
and other intellectual property rights that [***].

1.83

“Harpoon  Program  Know-How”  means  all  Program  Know-How  to  the  extent  (a)  specifically
related to the Harpoon Platform or any component of the Harpoon Platform, [***], (b) included in General Harpoon Sequence
Information, or (c) conceived, discovered, developed or otherwise made solely by or on behalf of Harpoon or its Affiliates, in
each case (a), (b), and (c), except to the extent included in Sections 1.6(a) or 1.130.  

1.84

Know-How.

“Harpoon  Program  Patents”  means  all  Program  Patents  that  claim  or  cover  Harpoon  Program

1.85

“Harpoon Sequence Information” means Antibody Sequence Information generated by Harpoon

as a result of a request from AbbVie under Section 4.1.3.

1.86

1.87

“Immune Effector Target” means a Target that is [***].

“In-Licensed Patents” has the meaning set forth in Section 11.2.3.

1.88

“IND”  means  an  application  filed  with  a  Regulatory  Authority  for  authorization  to  commence
Clinical Studies, including (a) an Investigational New Drug Application as defined in the FFDCA or any successor application or
procedure  filed  with  the  FDA,  (b)  any  equivalent  thereof  in  other  countries  or  regulatory  jurisdictions,  (e.g.,  a  Clinical  Trial
Application (CTA) in the European Union) and (c) all supplements, amendments, variations, extensions and renewals thereof that
may be filed with respect to the foregoing.

1.89

1.90

“Indemnification Claim Notice” has the meaning set forth in Section 12.3.

“Indemnified Party” has the meaning set forth in Section 12.3.

“Indication”  means  each  separate  and  distinct  disease,  disorder,  illness,  health  condition,  or
interruption, cessation or disruption of a bodily function, system, tissue type or organ, for which Regulatory Approval is required.

1.91

1.92

“Indirect Taxes” has the meaning set forth in Section 7.10. 

- 11 –

 
1.93

“Information” means all knowledge of a technical, scientific, business and other nature, including
know-how, technology, means, methods, processes, practices, formulae, instructions, skills, techniques, procedures, experiences,
ideas, technical assistance, designs, drawings, assembly procedures, computer programs, apparatuses, specifications, data, results
and other material, regulatory data, and other biological, chemical, pharmacological, toxicological, pharmaceutical, physical and
analytical,  pre-clinical,  clinical,  safety,  manufacturing  and  quality  control  data  and  information,  including  study  designs  and
protocols, reagents (e.g., plasmids, proteins, cell lines, assays and compounds) and biological methodology, in each case (whether
or not confidential, proprietary, patented or patentable, of commercial advantage or not) in written, electronic or any other form
now known or hereafter developed.

1.94

“Initiation” or “Initiate” means, with respect to a Clinical Study, the first dosing of the first human

subject in such Clinical Study.

1.95

1.96

“Intellectual Property” has the meaning set forth in Section 13.5.1.

“Internal  Reserved  Program”  means  [***]  internal  program  of  [***]  of  such  program  and  has

[***] of such program [***].  

1.97

“Joint  Intellectual  Property  Rights”  means  the  Joint  Program  Know-How  and  Joint  Program

Patents.  

1.98

“Joint  Program  Know-How”  means  all  Program  Know-How  that  is  conceived,  discovered,
developed, or otherwise made jointly by or on behalf of AbbVie, or its Affiliates or Sublicensees, on the one hand, and Harpoon,
or  its  Affiliates  or  licensees,  on  the  other  hand,  but  expressly  excluding  any  AbbVie  Program  Know-How,  Harpoon  Program
Know-How, and Product-Specific Know-How.  

1.99

“Joint Program Patents” means all Program Patents that claim or cover Joint Program Know-How,

but expressly excluding any AbbVie Program Patents, Harpoon Program Patents, and Product-Specific Patents.  

1.100

1.101

“Joint Research Committee” or “JRC” has the meaning set forth in Section 3.1.1.

“Knowledge” means [***] of the [***] of a Party, or any personnel 

holding positions equivalent to such job titles (but only to the extent such positions exist at such Party). 

- 12 –

 
1.102

[***].

1.103

“Licensed Product” means any product comprising or containing a Discovery Construct, alone or
in combination with one (1) or more other active ingredients, in any and all forms, presentations, delivery systems, dosage forms
and strengths, and formulations.

1.104

1.105

1.106

1.107

“Losses” has the meaning set forth in Section 12.1.

“MAA” has the meaning set forth in the definition of Drug Approval Application.

“Major Market” means each of the [***].

“Major Regulatory Filing” means major regulatory filings and documents (including INDs, Drug

Approval Applications, material labeling supplements, Regulatory Authority meeting requests, and core data sheets).

1.108

“Manufacture”  and  “Manufacturing”  means  all  activities  related  to  the  synthesis,  making,
production,  processing,  purifying,  formulating,  filling,  finishing,  packaging,  labeling,  shipping,  and  holding  of  the  Discovery
Construct,  any  Licensed  Product,  or  any  intermediate  thereof,  including  process  development,  process  qualification  and
validation,  scale-up,  pre-clinical,  clinical  and  commercial  production  and  analytic  development,  product  characterization,
stability testing, quality assurance, and quality control.

1.109

“Net Sales” [***]

1.109.1

1.109.2

1.109.3

1.109.4

[***]

[***]

[***]

[***]

1.109.5

[***] 

- 13 –

 
1.109.6

[***]

definition,[***] of such Licensed Product;

1.109.7

[***]of such Licensed Product and to the extent [***], where for purposes of this Net Sales

1.109.8

[***], provided that[***]

1.109.9

[***]

1.109.10

[***] but which [***].

[***]

1.109.11

In the event that a Licensed Product is sold in any country or other jurisdiction [***]:

(a)

[***]

- 14 –

 
(b)

(c)

(d)

[***].

[***]

[***]

1.110

1.111

1.112

1.113

1.114

“Neutral” has the meaning set forth in Schedule 14.7.3.

“New Target” has the meaning set forth in Section 2.3.

“Nominated Target” has the meaning set forth in Section 2.1.5.

“Non-Breaching Party” has the meaning set forth in Section 13.2.1.

“Non-Pivotal Human Clinical Trial” means an exploratory trial that has clinical efficacy, safety,

pharmacodynamics or biological activity as primary endpoint which is 
prospectively designed to generate sufficient data that may permit commencement of Pivotal Human Clinical Trials or a similar
clinical study or that otherwise satisfies the requirements of 21 CFR 312.21(b) or its foreign equivalent. 

- 15 –

 
1.115

“Novel  Target”  means  a  Therapeutic  Target  which,  as  of  the  time  of  the  initial  nomination  by

AbbVie of the corresponding TCR Target or TCR/Antibody Target, as applicable, as a potential Accepted Target, [***].

1.116

“Original Agreement” has the meaning set forth in the recitals hereto.

1.117

independently
therapeutically  active  pharmaceutical  or  biologic  products  referenced  in  Section  1.40(a)  or  such  diagnostic  or  other  product,
process, service or therapy referenced in Section 1.40(b), in each case other than the Discovery Construct.

“Other  Product”  means,  with  respect 

to  a  Combination  Product,  such 

1.118

1.119

“Owned Patents” has the meaning set forth in Section 11.2.3.

“Party” and “Parties” has the meaning set forth in the preamble hereto.

1.120

“Patents”  means  (a)  all  national,  regional  and  international  patents  and  patent  applications,
including  provisional  patent  applications,  (b)  all  patent  applications  filed  either  from  such  patents,  patent  applications  or
provisional  applications  or  from  an  application  claiming  priority  from  either  of  these,  including  divisionals,  continuations,
continuations-in-part,  provisionals,  converted  provisionals  and  continued  prosecution  applications,  (c)  any  and  all  patents  that
have issued or in the future issue from the foregoing patent applications ((a) and (b)), including utility models, petty patents and
design patents and certificates of invention, (d) any and all extensions or restorations by existing or future extension or restoration
mechanisms, including revalidations, reissues, re-examinations and extensions (including any pediatric exclusivity and other such
exclusivities  that  are  attached  to  patents,  supplementary  protection  certificates  and  the  like)  of  the  foregoing  patents  or  patent
applications ((a), (b), and (c)), and (e) any similar rights, including so-called pipeline protection or any importation, revalidation,
confirmation or introduction patent or registration patent or patent of additions to any of such foregoing patent applications and
patents.

1.121

“Person”  means  an  individual,  sole  proprietorship,  partnership,  limited  partnership,  limited
liability partnership, corporation, limited liability company, business trust, joint stock company, trust, unincorporated association,
joint venture or other similar entity or organization, including a government or political subdivision, department or agency of a
government.

1.122

1.123

“PHSA” means the United States Public Health Service Act, as amended from time to time.

“Pivotal Human Clinical Trial” means a trial in any country conducted in accordance with GCP

that is designed to establish statistically significant evidence of efficacy and 
safety  of  a  Licensed  Product  as  a  basis  for  a  BLA  or  that  would  otherwise  satisfy  requirements  of  21  CFR  312.21(c),  or  its
foreign equivalent. 

- 16 –

 
1.124

“PMDA”  means  Japan’s  Pharmaceuticals  and  Medical  Devices  Agency  and  any  successor

agency(ies) or authority having substantially the same function.

1.125

1.126

“Product Information” has the meaning set forth in Section 10.1.

“Product Infringement” has the meaning set forth in Section 8.3.1.

1.127

“Product Labeling” means, with respect to a Licensed Product in a country or other jurisdiction in
the Territory, (a) the Regulatory Authority‑approved full prescribing information for such Licensed Product for such country or
other jurisdiction, including any required patient information, and (b) all labels and other written, printed, or graphic matter upon
a container, wrapper, or any package insert utilized with or for such Licensed Product in such country or other jurisdiction.

1.128

“Product-Specific Harpoon Sequence Information” means Harpoon Sequence Information that

is [***] a Discovery Construct and/or a Licensed Product.

1.129

“Product-Specific  Know-How”  means  all  Program  Know-How  to  the  extent  [***],  including

[***], but excluding, for clarity, (a) [***], provided that such [***] Discovery Construct and/or a Licensed Product.

1.130

“Product-Specific Patents” means Program Patents that claim or cover Product-Specific Know-

How.

1.131

“Product Trademarks” means the Trademark(s) to be used by AbbVie or its Affiliates or its or
their  respective  Sublicensees  for  the  Development  or  Commercialization  of  Licensed  Products  in  the  Territory  and  any
registrations thereof or any pending applications relating thereto in the Territory (excluding, in any event, any trademarks, service
marks, names or logos that include any corporate name or logo of the Parties or their Affiliates or the term “TriTAC”).

1.132

“Program  Know-How”  means  all  Information  and  inventions  that  are  conceived,  discovered,
developed, or otherwise made by or on behalf of either Party or its Affiliates or licensees, solely or jointly with the other Party or
its Affiliates or licensees, under this Agreement.  

1.133

1.134

1.135

1.136

“Program Patents” mean all Patents that claim or cover Program Know-How.  

“Proposed Future In-Licensed Rights” has the meaning set forth in Section 6.9.

“Proposed Target” has the meaning set forth in Section 2.1.4.

“Regulatory Approval” means, with respect to a country or other jurisdiction in the Territory, all

approvals (including Drug Approval Applications), licenses, registrations, or 

- 17 –

 
authorizations  of  any  Regulatory  Authority  necessary  to  Commercialize  a  Discovery  Construct  or  Licensed  Product  in  such
country  or  other  jurisdiction,  including,  where  applicable,  pricing  or  reimbursement  approval  in  such  country  or  other
jurisdiction.

1.137

“Regulatory  Authority”  means  any  applicable  supra-national,  federal,  national,  regional,  state,
provincial, or local governmental or regulatory authority, agency, department, bureau, commission, council, or other entities (e.g.,
the  FDA,  EMA  and  PMDA)  regulating  or  otherwise  exercising  authority  with  respect  to  activities  contemplated  in  this
Agreement, including the Exploitation of the Discovery Constructs or Licensed Products in the Territory.

1.138

“Regulatory Documentation” means all (a) applications (including all INDs and Drug Approval
Applications  and  other  Major  Regulatory  Filings),  registrations,  licenses,  authorizations,  and  approvals  (including  Regulatory
Approvals), (b) correspondence and reports submitted to or received from Regulatory Authorities (including minutes and official
contact  reports  relating  to  any  communications  with  any  Regulatory  Authority)  and  all  supporting  documents  with  respect
thereto,  including  all  regulatory  drug  lists,  advertising  and  promotion  documents,  adverse  event  files,  and  complaint  files,  and
(c) Clinical Data and data contained or relied upon in any of the foregoing, in each case ((a), (b), and (c)) to the extent relating to
a Discovery Construct or Licensed Product.

1.139

“Regulatory Exclusivity” means, with respect to any country or other jurisdiction in the Territory,
an  additional  market  protection,  other  than  Patent  protection,  granted  by  a  Regulatory  Authority  in  such  country  or  other
jurisdiction which confers an exclusive Commercialization period during which AbbVie or its Affiliates or Sublicensees have the
exclusive  right  to  market  and  sell  a  Discovery  Construct  or  Licensed  Product  in  such  country  or  other  jurisdiction  through  a
regulatory exclusivity right (e.g., new chemical entity exclusivity, new use or indication exclusivity, new formulation exclusivity,
orphan drug exclusivity, or any applicable data exclusivity).

1.140

“Royalty  Term”  means,  with  respect  to  each  Licensed  Product  and  each  country  or  other
jurisdiction  in  the  Territory,  the  period  beginning  on  the  date  of  the  First  Commercial  Sale  of  such  Licensed  Product  in  such
country or other jurisdiction, and ending on the latest to occur of (a) the expiration, invalidation or abandonment date of the last
Valid Claim of any Joint Program Patent, Harpoon Background Patent, Harpoon Program Patent, or Product-Specific Patent that
covers  [***]  in  such  country  or  other  jurisdiction  [***]  in  such  country  or  other  jurisdiction  (provided  that  (A)  [***],  (b)  the
expiration of applicable Regulatory Exclusivity in such country or other jurisdiction for such Licensed Product or (c) the [***] of
the First Commercial Sale of such Licensed Product in such country or other jurisdiction. 

- 18 –

 
1.141

1.142

“[***]” means the [***].

“Segregate” means, with respect to a [***] relating to such [***] under this Agreement, including

using [***] relating to the [***]or any other [***]; provided, that, in [***] in connection with [***].

1.143

1.144

1.145

“Senior Officer” means, with respect to Harpoon, its [***], and with respect to AbbVie, its [***].

[***] has the meaning set forth in [***].

“Sublicensee” means a Person, other than an Affiliate or a Distributor, that is granted a sublicense

by AbbVie under the grants in Section 6.1 as provided in Section 6.3.

1.146

[***]

1.147

“T-Cell Receptor” means (i) a protein naturally expressed by a T-cell on the cell surface of a T-
cell  that  Binds  to  a  particular  TCR  Target,  or  any  modification  or  derivative  thereof,  such  as  a  single  chain  version  of  such
protein,  that  Binds  to  such  TCR  Target,  or  (ii)  such  protein  referenced  in  clause  (i)  expressed  non-naturally  by  genetically
engineered cells.  

1.148

“T-Cell  Receptor  Construct”  means  a  TriTAC  Construct  comprising  or  incorporating  a  T-Cell

Receptor as the domain that binds to a TCR Target.  

1.149

“Target”  means  a  protein  identified  by  a  unique  NCBI  Entrez  Gene  Symbol  and  NCBI  RefSeq
accession number or similar information, such as its amino acid or nucleic acid sequence.  Such Target shall be deemed to include
(a) any mutant or allelic variant of such protein referenced in the first sentence of this definition, including transcriptional and
post-transcriptional  isoforms  (e.g.,  alternative  splice  variants),  and  post-translational  modification  variants  (e.g.,  protein
processing,  maturation  and  glycosylation  variants);  and  (b)  truncated  forms  (including  fragments  thereof)  of  such  protein  or
variant, in each case (clauses (a) and (b)) [***]. 

- 19 –

 
1.150

1.151

1.152

1.153

1.154

1.155

1.156

1.157

“Target Acceptance Date” has the meaning set forth in Section 2.1.5.

“Target Availability Notice” has the meaning set forth in Section 2.1.5.

[***]

“Target Nomination Notice” has the meaning set forth in Section 2.1.5.

“TCR/Antibody Target” means either [***].  For clarity, (i) [***].  

“TCR Discovery Research Plan” has the meaning set forth in Section 1.57.1.

“TCR Sequence Information” has the meaning set forth in Section 4.1.

“TCR Target” means [***].  Such [***] shall be referred to in this Agreement as [***]. For the

purposes of clarity, a given TCR Target refers to [***].  For illustrative purposes only, in the case of a [***].

1.158

1.159

“Term” has the meaning set forth in Section 13.1.1.

“Terminated Target” has the meaning set forth in Section 13.8.

1.160

“Terminated  Territory”  means  each  Major  Market  with  respect  to  which  this  Agreement  is
terminated by Harpoon pursuant to Section 13.2.2, each country with respect to which this Agreement is terminated by AbbVie
pursuant to Section 13.3.2, or, if this Agreement is terminated in its entirety, the entire Territory.

1.161

1.162

“Territory” means the entire world.

“Therapeutic Target” means a Target that is [***].  

- 20 –

 
1.163

1.164

1.165

“Third Party” means any Person other than Harpoon, AbbVie and their respective Affiliates.

“Third Party Claims” has the meaning set forth in Section 12.1.

“Third Party Provider” has the meaning set forth in Section 4.6.

1.166

“Trademark” means  any  word,  name,  symbol,  color,  designation  or  device  or  any  combination
thereof that functions as a source identifier, including any trademark, trade dress, brand mark, service mark, trade name, brand
name, logo, business symbol or domain name, whether or not registered.

1.167

“TriTAC Construct” means a tri-specific antigen-binding molecule that contains (a) one anti-CD3
binding domain, including [***], (b) one domain that binds to a Therapeutic Target, a TCR Target, or a TCR/Antibody Target and
[***].  

1.168

1.169

“Unavailable Target(s)” has the meaning set forth in Section 2.1.2.

“Unblocking License” means a [***] license under [***] for the sole purpose of and solely to the

extent necessary to [***] as applicable, but expressly excluding (a) any rights to any [***].  

1.170

“United States” or “U.S.” means the United States of America and its territories and possessions

(including the District of Columbia and Puerto Rico).

1.171

“Valid Claim” means a claim of any [***] whose validity, enforceability, or patentability has not
been  rendered  invalid  by  any  of  the  following:  (a)  irretrievable  lapse,  abandonment,  revocation,  dedication  to  the  public,  or
disclaimer;  or  (b)  a  holding,  finding,  or  decision  of  invalidity,  unenforceability,  or  non-patentability  by  a  court,  governmental
agency,  national  or  regional  patent  office,  or  other  appropriate  body  that  has  competent  jurisdiction,  such  holding,  finding,  or
decision being final and unappealable or unappealed within the time allowed for appeal.

1.172

1.173

1.174

“Voting Stock” has the meaning set forth in the definition of “Change in Control.”

“Withholding Amount” has the meaning set forth in Section 7.9.

“Withholding Party” has the meaning set forth in Section 7.9.

- 21 –

 
1.175

“Working Group” has the meaning set forth in Section 3.4.

ARTICLE 2
TARGET NOMINATION [***]

2.1

Target Nomination.

AbbVie has the right to select, in its sole discretion, a total of up to two (2) TCR Targets and six
(6) TCR/Antibody Targets as Accepted Targets under this Agreement, in each case, as set forth in the remainder of this Section
2.1.1.

2.1.1

Subject  to  this  ARTICLE  2,  [***]  AbbVie  has  the  right  to  select,  in  its  sole
discretion,  a  total  of  up  to  [***]  TCR  Targets  as  Accepted  Targets  under  this  Agreement  for  purposes  of  Development  and
Commercialization  of  Discovery  T-Cell  Receptor  Constructs  and  Licensed  Products  incorporating  Discovery  T-Cell  Receptor
Constructs.  The first such TCR Target must be initially nominated by AbbVie no later than [***] following the Effective Date
and the second such TCR Target must initially be nominated by AbbVie no later than [***] following the Effective Date.  [***]

(a)

Subject  to  this  ARTICLE  2,  [***],  AbbVie  has  the  right  to  select,  in  its  sole
discretion, a total of up to [***] TCR/Antibody Targets as Accepted Targets under this Agreement for purposes of Development
and  Commercialization  of  Discovery  Constructs  and  Licensed  Products.    Such  TCR/Antibody  Targets  must  each  initially  be
nominated by AbbVie no later than [***] following the Amended Effective Date.  

(b)

(c)

In addition, subject to this ARTICLE 2, in partial consideration for the payments set
forth in this Section 2.1.1(c), AbbVie has the right, in its sole discretion, to select a total of up to [***] additional TCR/Antibody
Targets as Accepted Targets under this Agreement for purposes of Development and Commercialization of Discovery Constructs
and Licensed Products, which TCR/Antibody Targets must each initially be nominated by AbbVie no later than [***] following the
Amended Effective Date.  Within [***] after each TCR/Antibody Target selected under this Section 2.1.1(c) becomes an Accepted
Target pursuant to Section 2.1.5, AbbVie shall pay to Harpoon a one-time amount of Ten Million Dollars ($10,000,000).  For clarity,
the maximum aggregate amount payable by AbbVie under this Section 2.1.1(c) is Forty Million Dollars ($40,000,000) if AbbVie
exercises its right to nominate four (4) additional TCR/Antibody Targets under this Section 2.1.1(c) that become Accepted Targets.

2.1.2

Promptly, but in no case later than [***], after the Effective Date, Harpoon shall [***] set forth in
[***] 2.1.4], and 2.1.5, including (a) [***], in accordance with Section 2.1.3, a list of Therapeutic Targets that are not available for
nomination  by  AbbVie  under  this  Agreement  (“Unavailable  Targets”)  and  (b)  [***]  whether  Proposed  Targets  and  Nominated
Targets are on the list of 

- 22 –

 
Unavailable Targets.  [***].  The identity of the Unavailable Targets is deemed to be the Confidential Information of Harpoon and
the identity of the [***] Proposed Targets, and Nominated Targets is deemed to be the Confidential Information of AbbVie.  

on Schedule 2.1.3.  [***] shall maintain an up-to-date list of Unavailable Targets in accordance with the following:

2.1.3

As of the Amended Effective Date, the Unavailable Targets are the Therapeutic Targets set forth

shall in no event [***] at any time prior to the date that is [***] after the Amended Effective Date

(a)

Notwithstanding  anything  to  the  contrary  herein,  the  list  of  Unavailable  Targets

(b)

Subject  to  Section  2.1.3(a),  the  list  of  Unavailable  Targets  shall  be  limited  to  (i)
Therapeutic Targets [***] with respect to [***], (ii) Therapeutic Targets covered by [***] or (iii) Therapeutic Targets that are the
[***] such Therapeutic Target, provided, however, that such Therapeutic Target may [***], not to exceed: (A) [***] and such
[***], if Harpoon and such [***], provided, that, such [***]  In addition, subject to Section 2.1.3(a), if Harpoon [***], in each
such  case  (clauses  (A)  through  (C))  with  respect  to  a  [***],  then  the  Therapeutic  Target  [***]  shall  be  deemed  to  be  an
Unavailable Target.

(c)

Harpoon shall [***].

Prior to nomination of a Target (whether pursuant to Section 2.1.5, 2.2 or 2.3), AbbVie may, in
its discretion, disclose a Target it is considering for potential nomination (a “Proposed Target”) [***] and request in writing that
[***]

2.1.4

- 23 –

 
[***] if the Proposed Target is on the list of Unavailable Targets.  Within [***] following the [***] of a Proposed Target from
AbbVie, [***] whether such Nominated Target is on the list of Unavailable Targets and notify AbbVie in writing whether such
Proposed Target is or is not on the list of Unavailable Targets.  Notwithstanding anything herein to the contrary (a) AbbVie shall
have no obligation to nominate any Proposed Targets and (b) in no way shall a request by AbbVie with respect to a Proposed
Target under this Section 2.1.4 be deemed to be a nomination of the Target as an Accepted Target (and such Target shall not be
considered nominated unless and until it is formally nominated in accordance with the terms and conditions set forth in Section
2.1.5).

2.1.5

To nominate a TCR Target or TCR/Antibody Target as an Accepted Target, AbbVie shall [***] a
confidential  written  description  of  the  Therapeutic  Target]  (the  “Nominated  Target”)  corresponding  to  such  TCR  Target  or
TCR/Antibody  Target,  as  applicable,  including,  to  the  extent  available,  the  NCBI  Entrez  Gene  Symbol  and  NCBI  RefSeq
accession number and the amino acid sequence for such Therapeutic Target (the “Target Nomination Notice”).   Within  [***]
following  [***]  receipt  of  the  Target  Nomination  Notice  with  respect  to  a  Nominated  Target,  [***]  whether  such  Nominated
Target is on the list of Unavailable Targets and notify AbbVie in writing (“Target Availability Notice”) whether such Nominated
Target is or is not on the list of Unavailable Targets.  If the Target Availability Notice indicates that the Nominated Target is not
on the list of Unavailable Targets, then the TCR Target or TCR/Antibody Target, as applicable, corresponding to such Nominated
Target  shall  automatically  be  designated  as  an  “Accepted  Target”  on  the  date  of  AbbVie’s  receipt  of  the  Target  Availability
Notice (the “Target Acceptance Date”), and the Parties will have all rights and obligations hereunder in connection with such
Accepted  Target  (including  exclusivity  in  accordance  with  Section  6.8)  as  of  the  Target  Acceptance  Date.    If  the  Target
Availability Notice indicates that the Nominated Target is on the list of Unavailable Targets, then (a) [***] and (b) AbbVie shall
have the right to nominate an alternative Nominated Target (or the same Nominated Target, if it becomes available) in accordance
with this Section 2.1.5 on or prior to the later of (i) the applicable deadline set forth in Section 2.1.1 or (ii) the date that is [***]
after AbbVie’s receipt of such Target Availability Notice notwithstanding the deadline set forth in Section 2.1.1.  In the event that
[***]such Nominated Target [***].  In all cases, Harpoon acknowledges and agrees that if AbbVie is the first Person to submit a
Target  Nomination  Notice  for  a  Nominated  Target,  then  unless  such  Nominated  Target  is  subject  to  an  Internal  Reserved
Program, the TCR Target or TCR/Antibody Target, as applicable, corresponding to such Nominated Target will, subject to the
terms of this Agreement, be deemed an Accepted Target.  

2.2

[***]

- 24 –

 
2.3

2.4

[***].

Effect of [***] or [***]

.  In the event of a [***]
[***]  

ARTICLE 3

- 25 –

 
COLLABORATION MANAGEMENT

3.1

Joint Research Committee

.

3.1.1

Formation.    Within  [***]  after  the  Effective  Date,  the  Parties  shall  establish  a  joint  research
committee  (the  “Joint  Research  Committee”  or  “JRC”).    The  JRC  shall  consist  of  [***]  representatives  from  each  of  the
Parties, each with the requisite experience and seniority to enable such person to make decisions on behalf of the Parties with
respect to the issues falling within the jurisdiction of the JRC.  From time to time, each Party may substitute [***] or more of its
representatives to the JRC on written notice to the other Party.  [***] shall select from its representatives the chairperson for the
JRC.  From time to time, [***]

3.1.2

Specific Responsibilities.  The JRC shall develop the strategies for and oversee the research and
discovery related activities relating to the conversion of Discovery T-Cell Receptors into Discovery T-Cell Receptor Constructs
and  Discovery  Antibodies  into  Discovery  Antibody  Constructs,  as  applicable,  in  accordance  with  the  applicable  Discovery
Research Plan, and shall serve as a forum for the coordination of such activities.  In particular, the JRC shall:  

the Discovery Research Plan for each Accepted Target, and review and approve amendments thereto;  

(a)

periodically  (no  less  often  than  [***])  review  and  serve  as  a  forum  for  discussing

Research Activities;

(b)

(c)

(d)

serve  as  a  forum  for  discussion  of  results  from  the  conduct  of  the  Discovery

[***]

establish secure access methods (such as secure databases) for each Party to access

research and discovery and other JRC related Information as contemplated under this Agreement; and

agree in writing, except where in conflict with any provision of this Agreement.

(e)

perform such other functions as are set forth herein or as the Parties may mutually

3.2

General Provisions Applicable to the JRC

.

the Parties, with the location of such meetings alternating between 

3.2.1

Meetings and Minutes.  The JRC shall meet quarterly, or in each case as otherwise agreed to by

- 26 –

 
locations designated by Harpoon and locations designated by AbbVie.  The Alliance Manager shall be permitted to attend any
such JRC meetings.  The chairperson of the JRC shall be responsible for calling meetings on no less than [***]  notice.    Each
Party shall make all proposals for agenda items and shall provide all appropriate information with respect to such proposed items
at least [***]  in  advance  of  the  applicable  meeting;  provided,  that  under  exigent  circumstances  requiring  input  by  the  JRC,  a
Party may provide its agenda items to the other Party within a shorter period of time in advance of the meeting, or may propose
that  there  not  be  a  specific  agenda  for  a  particular  meeting,  so  long  as  the  other  Party  consents  to  such  later  addition  of  such
agenda items or the absence of a specific agenda for such meeting.  The chairperson of the JRC shall prepare and circulate for
review and approval of the Parties minutes of each meeting within [***] after the meeting.  The Parties shall agree on the minutes
of each meeting promptly, but in no event later than the next meeting of the JRC.  

3.2.2

Procedural  Rules.    The  JRC  shall  have  the  right  to  adopt  such  standing  rules  as  shall  be
necessary for its work, to the extent that such rules are not inconsistent with this Agreement.  A quorum of the JRC shall exist
whenever there is present at a meeting [***] appointed by each Party.  Representatives of the Parties on the JRC may attend a
meeting either in person or by telephone, video conference or similar means in which each participant can hear what is said by,
and be heard by, the other participants.  Representation by proxy shall be allowed.  The JRC shall take action by consensus of the
representatives present at a meeting at which a quorum exists, with each Party having a single vote irrespective of the number of
representatives of such Party in attendance, or by a written resolution signed by [***] appointed by each Party.  Employees or
consultants of either Party that are not representatives of the Parties on the JRC may attend meetings of the JRC; provided, that
such  attendees  (i)  shall  not  vote  or  otherwise  participate  in  the  decision-making  process  of  the  JRC,  and  (ii)  are  bound  by
obligations of confidentiality and non-disclosure equivalent to those set forth in ARTICLE 10.

3.2.3

Dispute  Resolution.    If  the  JRC  cannot,  or  does  not,  reach  consensus  on  an  issue,  then  the
dispute  shall  first  be  referred  to  the  Senior  Officers  of  the  Parties,  who  shall  confer  in  good  faith  on  the  resolution  of  the
issue.  Any final decision mutually agreed to by the Senior Officers shall be conclusive and binding on the Parties.  If the Senior
Officers are not able to agree on the resolution of any such issue within [***] after such issue was first referred to them, then,
such dispute shall be finally and definitively resolved by [***]; provided, however, that [***] provided, further, that [***] for the
purposes of this Section.  Disputes arising between the Parties in connection with or relating to this Agreement or any document
or instrument delivered in connection herewith, and that are outside of the jurisdiction of the JRC, shall be resolved pursuant to
Section 14.7.  

Limitations on Authority.  Each Party shall retain the rights, powers, and discretion granted to
it under this Agreement and no such rights, powers, or discretion shall be delegated to or vested in the JRC unless such delegation
or vesting of rights is expressly 

3.2.4

- 27 –

 
provided for in this Agreement or the Parties expressly so agree in writing.  The JRC shall not have the power to amend, modify,
or waive compliance with this Agreement, which may only be amended or modified as provided in Section 14.9 or compliance
with which may only be waived as provided in Section 14.12.  

3.2.5

Alliance Manager.  Each Party shall appoint a person(s) who shall oversee contact between the
Parties for all matters between meetings of the JRC and shall have such other responsibilities as the Parties may agree in writing
after the Effective Date (each, an “Alliance Manager”).  Each Party may replace its Alliance Manager at any time by notice in
writing to the other Party.

3.2.6

Discontinuation of the JRC.  Upon completion of the applicable Discovery Research Plan for a
given  Accepted  Target,  the  JRC  shall  have  no  further  responsibilities  or  authority  under  this  Agreement  with  respect  to  that
Accepted Target and the associated Discovery Constructs and Licensed Products.  Once the applicable Discovery Research Plan
has been completed for [***], the JRC will be considered fully dissolved by the Parties.  Additionally, in the event of a Change in
Control of Harpoon involving a Competitor, AbbVie shall have the right at any time and for any reason, effective upon written
notice, to disband the JRC pursuant to Section 14.2.    In  the  event  that  the  JRC  is  disbanded  pursuant  to  Section 14.2,  (a)  any
information, documents or reports that a Party is otherwise required to provide to the JRC pursuant to this Agreement shall be
provided directly to the other Party and (b) any matters delegated to the JRC shall be made by mutual agreement of the Parties,
subject to the dispute resolution provisions of Section 3.2.3.

3.3

Interactions Between a Committee and Internal Teams

.  The Parties recognize that each Party possesses an internal structure (including various committees, teams and review boards)
that  will  be  involved  in  administering  such  Party’s  activities  under  this  Agreement.    Nothing  contained  in  this  Article  shall
prevent  a  Party  from  making  routine  day-to-day  decisions  relating  to  the  conduct  of  those  activities  for  which  it  has  a
performance  or  other  obligations  hereunder,  in  each  case  in  a  manner  consistent  with  the  then-current  applicable  Discovery
Research Plan and the terms and conditions of this Agreement.  

3.4

Working Groups

.  From time to time, the JRC may establish and delegate duties to sub-committees or directed teams (each, a “Working Group”)
on an “as-needed” basis to oversee particular projects or activities (for example, joint project team, joint finance group, and/or
joint  intellectual  property  group).    Each  such  Working  Group  shall  be  constituted  and  shall  operate  as  the  JRC  determines;
provided that each Working Group shall have equal representation from each Party, unless otherwise mutually agreed.  Working
Groups  may  be  established  on  an  ad  hoc  basis  for  purposes  of  a  specific  project  or  on  such  other  basis  as  the  JRC  may
determine.  Each Working Group and its activities shall be subject to the oversight, review and approval of, and shall report to,
the JRC.  In no event shall the authority of the Working Group exceed that specified for the JRC.  All decisions of a Working
Group shall be by consensus.  Any disagreement between the designees of AbbVie and Harpoon on a Working Group shall be
referred to the JRC for resolution.

- 28 –

 
3.5

Expenses

.  Each Party shall be responsible for all travel and related costs and expenses for its members and other representatives to attend
meetings of, and otherwise participate on, the JRC or any Working Group.

ARTICLE 4
DEVELOPMENT AND REGULATORY

4.1

Sequence Delivery

.  

4.1.1

For each Accepted Target that was selected by AbbVie pursuant to Section 2.1.1(a), AbbVie will
deliver to Harpoon the [***] Controlled by AbbVie that Bind to such Accepted Target (each, a “Discovery T-Cell Receptor”),
together  with  related  materials  and  data  as  set  forth  in  the  TCR  Discovery  Research  Plan  (collectively,  with  respect  to  the
applicable  Accepted  Target,  the  “TCR  Sequence  Information”),  within  [***]s  following  the  applicable  Target  Acceptance
Date.  

4.1.2

For each Accepted Target that was selected by AbbVie pursuant to Sections 2.1.1(b) or 2.1.1(c),
AbbVie,  in  its  sole  discretion,  will  initially  deliver  to  Harpoon  either  (a)  the  TCR  Sequence  Information  with  respect  to  such
Accepted  Target  or  (b)  [***]  (each,  a  “Discovery  Antibody”),  [***]  as  set  forth  in  the  Antibody  Discovery  Research  Plan
(collectively, with respect to the applicable Accepted Target, the “Antibody Sequence Information”), in each case (a) and (b),
within [***] following the applicable Target Acceptance Date.  

shall be included in the Discovery Research Activities for such Accepted Target.

4.1.3

On an [***], AbbVie may request by written notice to Harpoon [***], that Harpoon [***].  [***]

4.2

Creation of Discovery Constructs

.    For  each  Accepted  Target  (including  any  [***]  or  New  Target),  Harpoon  shall  carry  out  the  Discovery  Research
Activities.  Following delivery by AbbVie of the TCR Sequence Information or Antibody Sequence Information, as applicable,
with  respect  to  an  Accepted  Target,  Harpoon  will  create  and  evaluate  against  the  Discovery  Construct  Success  Criteria  [***]
Discovery  T-Cell  Receptor  Constructs  per  Discovery  T-Cell  Receptor  or  such  number  of  Discovery  Antibody  Constructs  per
Discovery  Antibody,  as  applicable,  per  Accepted  Target  that  are  anticipated  to  be  generated  in  accordance  with  the  applicable
Discovery Research Plan and timeline set forth therein. The applicable Discovery Research Plan shall be conducted over a period
of  up  to  [***]  from  receipt  of  such  TCR  Sequence  Information  or  Antibody  Sequence  Information,  as  applicable,  for  each
Accepted  Target  (or  from  the  date  of  completion  by  Harpoon  of  Stage  1  of  the  Antibody  Discovery  Research  Plan,  if
applicable).    Notwithstanding  the  foregoing,  Harpoon  shall  not  be  required  to  conduct  Discovery  Research  Activities
concurrently for more than [***] Accepted Targets.  If Harpoon[***]with respect to a 

- 29 –

 
[***](i.e. above such [***] Accepted Targets) based on the foregoing sentence, [***] shall be [***].  Following the completion
of  such  Discovery  Research  Activities  for  an  Accepted  Target,  Harpoon  shall  deliver  to  AbbVie,  by  the  applicable  Discovery
Construct Delivery Deadline, [***] (collectively, the “Accepted Target Deliverables”).  Upon delivery of the Accepted Target
Deliverables  with  respect  to  an  Accepted  Target,  Harpoon  shall  have  completed  all  of  its  obligations  under  the  applicable
Discovery  Research  Plan  with  respect  to  such  Accepted  Target,  and  thereafter  AbbVie  shall  evaluate  whether  the  Discovery
Construct Success Criteria have been met.  If Harpoon is in material breach of its obligation to perform any Discovery Research
Activities  and  fails  to  remedy  such  breach  within  [***] after written notice thereof from AbbVie, [***].    In  the  event  of  such
[***].  Notwithstanding the foregoing, if [***] following the date [***] such [***].  The Parties acknowledge and agree that in
the event [***].  If AbbVie so [***], to the extent reasonably requested by AbbVie and permitted under the terms and conditions
of  [***],  [***]  to  the  extent  [***].  Following  AbbVie’s  receipt  of  the  Accepted  Target  Deliverables,  AbbVie  will  evaluate
whether  the  Discovery  Construct  Success  Criteria  have  been  met.    If  AbbVie  determines  in  good  faith  that  the  Discovery
Construct  Success  Criteria  have  not  been  met  by  any  of  the  Discovery  Constructs  for  an  Accepted  Target,  [***]of  AbbVie’s
receipt  of  the  Accepted  Target  Deliverables  for  such  Accepted  Target,  provide  written  notice  to  Harpoon  identifying  the
deficiencies and Harpoon will[***] to AbbVie in accordance with this Section 4.2.  

4.3

Development of Discovery Constructs and Licensed Products

.    For  each  Accepted  Target,  following  the  applicable  Target  Acceptance  Date,  except  for  Harpoon’s  responsibilities  in  the
conduct  of  the  applicable  Discovery  Research  Plan,  AbbVie  shall  have  the  sole  right  to  Develop  and  Manufacture  (and  shall
control all aspects of Development and Manufacturing), including seeking Regulatory Approvals for, Discovery Constructs and
Licensed 

- 30 –

 
Products  in  the  Field  and  in  the  Territory  and,  for  clarity,  Harpoon  and  its  Affiliates  shall  have  no  right  to  do  so.    For  each
Accepted  Target,  following  the  creation  of  the  applicable  Discovery  Constructs,  AbbVie  shall  use  Commercially  Reasonable
Efforts  to  Develop  and  obtain  Regulatory  Approval  for  a  Licensed  Product  for  at  least  one  Indication  for  use  in  [***]  Major
Market.  For the purposes of clarity, AbbVie’s obligation to Develop and obtain Regulatory Approval for a Licensed Product as
set  forth  in  this  Section  4.3  shall  be  satisfied  by  AbbVie’s  Commercially  Reasonable  Efforts  to  Develop  a  Licensed  Product
directed to [***].  AbbVie shall have the right to satisfy its diligence obligations under this Section 4.3 through its Affiliates or
Sublicensees.  Except as set forth in this Section 4.3, AbbVie shall have no other diligence obligations, express or implied, with
respect  to  the  Development  of  the  Discovery  Constructs  or  Licensed  Products  with  respect  to  such  Accepted  Target  in  the
Territory.    For  each  Accepted  Target,  following  the  applicable  Target  Acceptance  Date  and  until  submission  of  a  BLA  for  a
Licensed  Product  directed  to  such  Accepted  Target  in  a  Major  Market,  AbbVie  will  provide  to  Harpoon  annual  reports  within
[***] after the end of each Calendar Year summarizing the key Development activities undertaken and summarizing the results
achieved  with  respect  to  the  applicable  Discovery  Constructs  and  Licensed  Products  during  such  Calendar  Year,  and  Harpoon
shall provide the JRC with interim updates on such activities and results at its regularly scheduled meetings.

4.4

Supply of Technology for Development Purposes

.  On an Accepted Target-by-Accepted Target basis:  

Harpoon shall, and shall cause its Affiliates to, [***], disclose and make available to
AbbVie (which obligation may be satisfied by granting personnel designated by AbbVie controlled access to an electronic data
room),  in  such  form  as  maintained  by  Harpoon  in  the  ordinary  course  of  business,  [***]  for  AbbVie’s  Development  of  the
Discovery Constructs (including sequence information), [***] of the Discovery Constructs pursuant to Section 4.2 and [***] of
the development, making, conception, or reduction to practice of such [***]  

(a)

Harpoon  shall  provide  AbbVie  with  all  reasonable  assistance  required  in  order  to
transfer to AbbVie the [***] required to be produced pursuant to clause (a) above, in each case in a timely manner, and shall assist
AbbVie  with  respect  to  the  [***].   Without  prejudice  to  the  generality  of  the  foregoing,  if  visits  of  Harpoon’s  representatives  to
AbbVie’s facilities are reasonably requested by AbbVie for purposes of transferring [***]

(b)

- 31 –

 
[***]  to  AbbVie  or  for  purposes  of  providing  AbbVie  the  assistance  referenced  in  the  preceding  sentence,  Harpoon  shall  send
appropriate representatives to AbbVie’s facilities.  For each Accepted Target, Harpoon shall provide [***]pursuant to this Section
4.4 [***] and AbbVie shall reimburse Harpoon for all out-of-pocket travel and related expenses incurred pursuant to this Section
4.4; any additional consulting time shall be performed and compensated as mutually agreed by the Parties in writing.

(c)
subject to the negotiation of a mutually agreed upon separate agreement.

The Parties may, each in their sole discretion, elect to collaboratively develop [***],

4.5

Expenses and Invoicing

.  Except as expressly set forth in this Agreement, each Party shall bear all costs and expenses associated with the Development
activities for which such Party is responsible under this Agreement and the applicable Discovery Research Plan; provided, that
[***] pursuant to (including the limitations set forth in) Section 4.2.  If AbbVie [***] in accordance with Section 4.2, then [***]
associated with [***], and, Harpoon shall [***].

4.6

Subcontracting

.  Each Party shall have the right to subcontract any of its Development activities to a Third Party (a “Third Party Provider”);
provided, that [***] to such Third Party Provider and the activities to be subcontracted [***] sufficient for Harpoon to comply
with the applicable terms and conditions of this Agreement, including the confidentiality provisions of ARTICLE 10.

4.7

Regulatory Matters

.  

4.7.1

Regulatory Activities.  

As  between  the  Parties,  AbbVie,  at  its  sole  expense,  shall  have  the  sole  right  to
prepare, obtain, and maintain the Drug Approval Applications (including the setting of the overall regulatory strategy therefor),
other Regulatory Approvals and other regulatory submissions, and to conduct communications with the Regulatory Authorities,
for Discovery Constructs or Licensed Products in the Territory (which shall include filings of or with respect to INDs and other
filings or communications with the Regulatory Authorities).  Harpoon 

(a)

- 32 –

 
shall support AbbVie, as may be reasonably necessary, in obtaining Regulatory Approvals for the Licensed Products, and in the
activities in support thereof, including providing necessary documents or other materials required by Applicable Law to obtain
Regulatory Approvals, in each case in accordance with the terms and conditions of this Agreement and the Discovery Research
Plans.

(b)

All  Regulatory  Documentation  (including  all  Regulatory  Approvals  and  Product
Labeling) specifically relating to the Discovery Constructs or Licensed Products with respect to the Territory shall be owned by,
and shall be the sole property and held in the name of, AbbVie or its designated Affiliate, Sublicensee or designee.  Harpoon shall
duly execute and deliver, or cause to be duly executed and delivered, such instruments and shall do and cause to be done such
acts and things, including the filing of such assignments, agreements, documents, and instruments, as may be necessary under, or
as AbbVie may reasonably request in connection with, or to carry out more effectively the purpose of, or to better assure and
confirm unto AbbVie its rights under, this Section.  

4.7.2

Recalls.   AbbVie  shall  make  every  reasonable  effort  to  notify  Harpoon  promptly  following  its
determination that any event, incident, or circumstance has occurred that may result in the need for a recall, market suspension, or
market  withdrawal  of  a  Licensed  Product  in  the  Territory,  and  shall  include  in  such  notice  the  reasoning  behind  such
determination, and any supporting facts.  AbbVie (or its Sublicensee) shall have the right to make the final determination whether
to  voluntarily  implement  any  such  recall,  market  suspension,  or  market  withdrawal  in  the  Territory.    If  a  recall,  market
suspension,  or  market  withdrawal  is  mandated  by  a  Regulatory  Authority  in  the  Territory,  AbbVie  (or  its  Sublicensee)  shall
initiate  such  a  recall,  market  suspension,  or  market  withdrawal  in  compliance  with  Applicable  Law.    For  all  recalls,  market
suspensions  or  market  withdrawals  undertaken  pursuant  to  this  Section  4.7.2,  AbbVie  (or  its  Sublicensee)  shall  be  solely
responsible for the execution thereof, and Harpoon shall reasonably cooperate in all such recall efforts, at AbbVie’s expense.

Research Activities in good scientific manner and in compliance with all Applicable Law.

4.7.3

Compliance.  Each Party shall perform or cause to be performed, any and all of its Discovery

4.7.4

Records.

(a)

Each of Harpoon and AbbVie shall, and shall ensure that its Third Party Providers,
maintain  records  in  sufficient  detail  and  in  good  scientific  manner  appropriate  for  patent  and  regulatory  purposes,  and  in
compliance  with  Applicable  Law,  which  shall  be  complete  and  accurate  and  shall  properly  reflect  all  work  done  and  results
achieved in the performance of its designated Discovery Research Activities which shall record only such activities and shall not
include  or  be  commingled  with  records  of  activities  outside  the  scope  of  this  Agreement.    Such  records  shall  be  retained  by
Harpoon or AbbVie, as the case may be, [***], or for such longer period as may be required by Applicable Law.  Upon request,
Harpoon shall provide copies of the records it has maintained pursuant to this Section 4.7.4 to AbbVie.  AbbVie shall maintain
such records and the information disclosed therein in confidence in accordance with ARTICLE 10.

- 33 –

 
AbbVie  shall  have  the  right,  [***]  to  inspect  and  copy  all  records  of  Harpoon
maintained pursuant to Section 4.7.4.  AbbVie shall maintain such records and the information disclosed therein in confidence in
accordance with ARTICLE 10.  

(b)

5.1

In General

ARTICLE 5
COMMERCIALIZATION

.  AbbVie (itself or through its Affiliates or Sublicensees) shall have the sole right to Commercialize Discovery Constructs and
Licensed Products in the Territory at its own cost and expense.  

5.2

Commercialization Diligence

.  For each Accepted Target, AbbVie shall use Commercially Reasonable Efforts to Commercialize one Licensed Product in [***]
Major  Market  following  receipt  of  Regulatory  Approval  therefor  in  such  Major  Market;  provided,  that  (a)  such  obligation  is
expressly  conditioned  upon  (i)  Harpoon’s  and  its  Affiliates’  performing  their  respective  obligations  hereunder,  (ii)  [***]  and
(iii) the [***].  For the purposes of clarity, AbbVie’s obligation to Commercialize a Licensed Product as set forth in this Section
5.2  shall  be  satisfied  by  AbbVie’s  Commercially  Reasonable  Efforts  to  Commercialize  a  Licensed  Product  directed  to
[***].  Harpoon acknowledges and agrees that, in addition to the foregoing, (A) the Commercialization of Licensed Product may,
subject  to  Section  14.1,  be  delayed,  suspended  or  otherwise  modified  by  AbbVie  in  response  to  circumstances  outside  the
reasonable control of AbbVie, including force majeure events, (B) AbbVie shall have the right to satisfy its diligence obligations
under this Section through its Affiliates or Sublicensees, and [***].  With respect to a particular Accepted Target, in the event that
AbbVie decides to discontinue the development or commercialization of a Discovery Construct or Licensed Product in favor of
another  Discovery  Construct  or  Licensed  Product,  its  obligations  under  this  Section  shall  cease  with  respect  to  such  initial
Discovery  Construct  or  Licensed  Product  in  favor  of  such  other  Discovery  Construct  or  Licensed  Product.    Harpoon  further
acknowledges  that  AbbVie  is  in  the  business  of  Exploiting  products  and  nothing  in  this  Agreement  shall  be  construed  as
restricting  such  business  or  imposing  on  AbbVie  the  duty  to  Exploit  any  Licensed  Product  for  which  royalties  are  payable
hereunder  to  the  exclusion  of,  or  in  preference  to,  any  other  product,  or  in  any  way  other  than  in  accordance  with  its  normal
commercial practices.  If at any time Harpoon has a reasonable basis to believe that AbbVie is in material breach of its material
obligations under this 

- 34 –

 
Section, then Harpoon may so notify AbbVie, specifying the basis for its belief, and the Parties shall meet within [***] after such
notice to discuss in good faith Harpoon’s concerns.  

5.3

Booking of Sales; Distribution

.   AbbVie  shall  have  the  sole  right  to  invoice  and  book  sales,  establish  all  terms  of  sale  (including  pricing  and  discounts)  and
warehousing,  and  distribute  the  Licensed  Products  in  the  Territory  and  to  perform  or  cause  to  be  performed  all  related
services.    AbbVie  shall  handle  all  returns,  recalls,  or  withdrawals,  order  processing,  invoicing,  collection,  distribution,  and
inventory management with respect to the Licensed Products in the Territory.

5.4

Product Trademarks

.  AbbVie shall have the sole right to determine and own the Product Trademarks to be used with respect to the Exploitation of
the Licensed Products on a worldwide basis.  Harpoon shall not, and shall not permit its Affiliates to, attack, dispute, or contest
the  validity  of  or  ownership  of  such  Product  Trademark  anywhere  in  the  Territory  or  any  registrations  issued  or  issuing  with
respect thereto or use in their respective businesses, any Trademark that is confusingly similar to, misleading or deceptive with
respect to or that dilutes any (or any part) of the Product Trademarks.  Notwithstanding the foregoing, to the extent required by
Applicable Law in a country or other jurisdiction in the Territory, the promotional materials, packaging, and Product Labeling for
the  Licensed  Products  used  by  AbbVie  and  its  Affiliates  in  connection  with  the  Licensed  Products  in  such  country  or  other
jurisdiction shall contain (a) the corporate name of Harpoon (and to the extent required, Harpoon grants AbbVie a license, with
the right to sublicense, to use the same for such purpose), and (b) the logo and corporate name of the manufacturer (if other than
AbbVie or an Affiliate).

5.5

Commercial Supply of Discovery Constructs or Licensed Products

.  As between the Parties, AbbVie shall have the sole right, at its expense, to Manufacture (or have Manufactured) and supply
Discovery Constructs and Licensed Products for commercial sale in the Territory by AbbVie and its Affiliates and Sublicensees.

ARTICLE 6
GRANT OF RIGHTS

6.1

Grants to AbbVie

.  

on an Accepted Target-by-Accepted Target basis:

6.1.1

Upon the Effective Date, Harpoon (on behalf of itself and its Affiliates) hereby grants to AbbVie,

an exclusive (including with regard to Harpoon and its Affiliates, except as provided
in  Section  6.6)  license  (or  sublicense),  with  the  right  to  grant  sublicenses  in  accordance  with  Section  6.3,  under  the  Harpoon
Background Patents, the Harpoon Program Patents, the Harpoon Background Know-How, the Harpoon Program Know-How and
Harpoon’s  interests  in  the  Joint  Program  Patents  and  the  Joint  Program  Know-How,  to  Exploit  the  Discovery  T-Cell  Receptor
Constructs and Licensed Products comprising or containing Discovery T-Cell Receptor Constructs in the Field in the Territory;

(a)

in Section 6.6) license and right of reference, with the right to grant 

(b)

an exclusive (including with regard to Harpoon and its Affiliates, except as provided

- 35 –

 
sublicenses  and  further  rights  of  reference  in  accordance  with  Section  6.3,  under  the  Regulatory  Approvals  and  any  other
Regulatory Documentation that Harpoon or its Affiliates may Control with respect to the Discovery T-Cell Receptor Constructs
or Licensed Products comprising or containing Discovery T-Cell Receptor Constructs as necessary for purposes of Exploiting the
Discovery T-Cell Receptor Constructs and Licensed Products comprising or containing Discovery T-Cell Receptor Constructs in
the Field in the Territory;

a  non-exclusive,  royalty-free  license,  with  the  right  to  grant  sublicenses  in
accordance with Section 6.3,  under  the  Harpoon  Background  Patents,  the  Harpoon  Program  Patents,  the  Harpoon  Background
Know-How,  the  Harpoon  Program  Know-How  and  Harpoon’s  interests  in  the  Joint  Program  Patents  and  the  Joint  Program
Know-How, to conduct Discovery Research Activities assumed by AbbVie in accordance with Sections 4.2 (if any); and

(c)

to AbbVie, on an Accepted Target-by-Accepted Target basis:

6.1.2

Upon the Amended Effective Date, Harpoon (on behalf of itself and its Affiliates) hereby grants

an exclusive (including with regard to Harpoon and its Affiliates, except as provided
in  Section  6.6)  license  (or  sublicense),  with  the  right  to  grant  sublicenses  in  accordance  with  Section  6.3,  under  the  Harpoon
Background Patents, the Harpoon Program Patents, the Harpoon Background Know-How, the Harpoon Program Know-How and
Harpoon’s  interests  in  the  Joint  Program  Patents  and  the  Joint  Program  Know-How,  to  Exploit  the  Discovery  Antibody
Constructs and Licensed Products comprising or containing Discovery Antibody Constructs in the Field in the Territory; and

(a)

(b)

an exclusive (including with regard to Harpoon and its Affiliates, except as provided
in Section 6.6) license and right of reference, with the right to grant sublicenses and further rights of reference in accordance with
Section 6.3, under the Regulatory Approvals and any other Regulatory Documentation that Harpoon or its Affiliates may Control
with  respect  to  the  Discovery  Antibody  Constructs  or  Licensed  Products  comprising  or  containing  Discovery  Antibody
Constructs  as  necessary  for  purposes  of  Exploiting  the  Discovery  Antibody  Receptor  Constructs  and  Licensed  Products
comprising or containing Discovery Antibody Constructs in the Field in the Territory.

The grants set forth in Section 6.1.1 and Section 6.1.2 will automatically come into full force and
effect  on  the  Target  Acceptance  Date  for  such  Accepted  Target  without  any  further  action  required  by  either  Party  under  this
Agreement.

6.1.3

6.2

Grants to Harpoon

.  

6.2.1

Upon the Effective Date, AbbVie hereby grants to Harpoon, on an Accepted Target-by-Accepted
Target basis, a non-exclusive, royalty-free license, without the right to grant sublicenses (other than to permitted subcontractors
of Harpoon in accordance with Section 4.6), under the AbbVie Background Patents, AbbVie Background Know-How, AbbVie
Program Patents, AbbVie Program Know-How, and AbbVie’s interests in the Joint Program Patents and the Joint Program Know-
How to Develop and Manufacture the Discovery T-Cell Receptor Constructs in the Territory solely for purposes of performing its
obligations as set forth in, and subject to, the Discovery Research Plans.

- 36 –

 
6.2.2

Upon the Amended Effective Date, AbbVie hereby grants to Harpoon, on an Accepted Target-
by-Accepted  Target  basis,  a  non-exclusive,  royalty-free  license,  without  the  right  to  grant  sublicenses  (other  than  to  permitted
subcontractors of Harpoon in accordance with Section 4.6), under the AbbVie Background Patents, AbbVie Background Know-
How, AbbVie Program Patents, AbbVie Program Know-How, and AbbVie’s interests in the Joint Program Patents and the Joint
Program  Know-How  to  Develop  and  Manufacture  the  Discovery  Antibody  Constructs  in  the  Territory  solely  for  purposes  of
performing its obligations as set forth in, and subject to, the Discovery Research Plans.

The grant set forth in Section 6.2.1 and Section 6.2.2 will automatically come into full force and
effect  on  the  Target  Acceptance  Date  for  such  Accepted  Target  without  any  further  action  required  by  either  Party  under  this
Agreement.

6.2.3

6.3

Sublicenses

.  AbbVie shall have the right to grant sublicenses (or further rights of reference), through multiple tiers of sublicensees, under the
licenses and rights of reference granted in Section 6.1, to its Affiliates and other Persons; provided that any such sublicenses shall
be  consistent  with  the  terms  and  conditions  of  this  Agreement  and  AbbVie  shall  remain  liable  for  its  obligations  under  this
Agreement  and  for  the  performance  of  all  sublicensees.   AbbVie  shall  provide  Harpoon  with  a  copy  of  any  such  sublicense
agreement  within  [***]  after  the  execution  thereof,  which  copy  may  be  redacted  with  respect  to  information  not  pertinent  to
compliance with this Agreement.

6.4

Distributorships

.  . AbbVie shall have the right, in its sole discretion, to appoint its Affiliates, and AbbVie and its Affiliates shall have the right, in
their  sole  discretion,  to  appoint  any  other  Persons,  in  the  Territory  or  in  any  country  or  other  jurisdiction  of  the  Territory,  to
distribute, market, and sell the Licensed Products.  Where AbbVie or its Affiliates appoints such a Person and such Person is not
an Affiliate of AbbVie and does not have rights to, and does not, Manufacture any Licensed Product (except solely to package or
label  such  Licensed  Product  purchased  in  bulk  form  from  AbbVie  or  its  Affiliates),  that  Person  shall  be  a  “Distributor”  for
purposes of this Agreement.

6.5

Co-Promotion Rights

.  .  For purposes of clarity, AbbVie and its Affiliates shall have the right, in their sole discretion, to co-promote the Licensed
Products with any other Person(s), or to appoint one (1) or more Third Parties to promote the Licensed Products without AbbVie
in all or any part of the Territory.

6.6

Retention of Rights

.

6.6.1

Notwithstanding  the  exclusive  licenses  granted  to  AbbVie  pursuant  to  Section  6.1,  Harpoon
retains  the  right  to  practice  under  the  Harpoon  Background  Patents,  the  Harpoon  Program  Patents,  the  Harpoon  Background
Know-How, the Harpoons Program Know-How, Harpoon’s interests in the Joint Program Patents and the Joint Program Know-
How, Regulatory Approvals and any other Regulatory Documentation (a) to perform (and to sublicense Third Parties to perform
as permitted hereunder) its obligations under this Agreement and (b) for any purpose outside the scope of the licenses and rights
granted  pursuant  to  Section  6.1,  including  to  Exploit  any  products  or  services  other  than  Discovery  Constructs  and  Licensed
Products subject to Section 6.8.1.  Except as expressly provided herein, Harpoon grants no other right or license, 

- 37 –

 
including  any  rights  or  licenses  to  the  Harpoon  Background  Patents,  the  Harpoon  Program  Patents,  the  Harpoon  Background
Know-How, the Harpoon Program Know-How, Harpoon’s interests in the Joint Program Patents and the Joint Program Know-
How, the Regulatory Documentation or any other Patent or intellectual property rights not otherwise expressly granted herein.

6.6.2

Except  as  expressly  provided  herein,  AbbVie  grants  no  other  right  or  license,  including  any
rights  or  licenses  to  the  AbbVie  Background  Patents,  the  AbbVie  Program  Patents,  the  AbbVie  Background  Know-How,  the
AbbVie  Program  Know-How,  the  Regulatory  Documentation,  or  any  other  Patent  or  intellectual  property  rights  not  otherwise
expressly granted herein.

6.7

Confirmatory Patent License

.  Harpoon  shall  if  requested  to  do  so  by  AbbVie  immediately  enter  into  confirmatory  license  agreements  consistent  with  this
Agreement in the form or substantially the form reasonably requested by AbbVie for purposes of recording the licenses granted
under this Agreement with such patent offices in the Territory as AbbVie considers appropriate.  Until the execution of any such
confirmatory  licenses,  so  far  as  may  be  legally  possible,  Harpoon  and  AbbVie  shall  have  the  same  rights  in  respect  of  the
Harpoon Background Patents, Harpoon Program Patents and Joint Program Patents and be under the same obligations to each
other in all respects as if the said confirmatory licenses had been executed.

6.8

Exclusivity with Respect to the Territory

.  

6.8.1

Harpoon  shall  not,  and  shall  cause  its  Affiliates  not  to,  on  an  Accepted  Target-by-Accepted
Target  basis,  beginning  on  the  applicable  Target  Acceptance  Date  until  the  termination  or  expiration  of  this  Agreement  with
respect to the applicable Accepted Target (including by [***] or [***]), (a) directly or indirectly, whether alone or together with a
Third Party, [***] for any purpose except [***], (b) directly or indirectly, develop, commercialize or manufacture any Competing
Product in any country or other jurisdiction in the Territory, or (c) license, authorize, appoint, or otherwise enable any Third Party
to directly or indirectly, develop, commercialize or manufacture any Competing Product in any country or other jurisdiction in
the Territory.  

6.8.2

Notwithstanding the provisions of Section 6.8.1, if, during the Term, [***]. 

- 38 –

 
From the Amended Effective Date until [***] after the Amended Effective Date, Harpoon shall
not, and shall cause its Affiliates not to [***], or is intended for use against, [***]or otherwise [***] any other action that would
preclude a [***].

6.8.3

6.9

In-License Agreements

.  Neither Harpoon nor any of its Affiliates shall, [***] enter into any agreement with a Third Party (a) during the Term, related to
Information,  Regulatory  Documentation,  materials,  Patents,  or  other  intellectual  other  property  rights  [***],  provided  that,  for
clarity, the foregoing shall not restrict Harpoon or its Affiliates from entering into any agreement with a Third Party related to
Information, Regulatory Documentation, materials, Patents, or other intellectual other property rights directed [***].  Subject to
Section 8.6,  if  Harpoon  or  any  of  its  Affiliates,  after  the  Effective  Date  (or  after  the  Amended  Effective  Date  with  respect  to
Discovery Antibody Constructs), become a party to a license, sublicense or other agreement for additional intellectual property
rights, with the right to sublicense, that are [***] pursuant to the preceding sentence, then Harpoon shall inform AbbVie and shall
[***]t (“Proposed Future In-Licensed Rights”).  If AbbVie notifies Harpoon in writing within [***] after receipt of such copy
that AbbVie wishes to receive a license or sublicense (as applicable) under, and be subject to the rights and obligations of, the
Proposed Future In-Licensed Rights as they apply to AbbVie and this Agreement, then the Proposed Future In-Licensed Rights
shall  automatically  be  included  in  the  Harpoon  Background  Patents  and/or  Harpoon  Background  Know-How  (as  applicable)
hereunder and AbbVie agrees to abide by all applicable terms and conditions of such license, sublicense or other agreement, as it
relates  to  AbbVie  and  this  Agreement,  including  payment  of  any  financial  obligations  based  upon  AbbVie’s  practice  of  such
intellectual property rights.  Except as provided in the preceding sentence, Harpoon shall be solely responsible for and shall bear
any and all payments under any Harpoon In-License Agreements.

ARTICLE 7
PAYMENTS AND RECORDS

7.1

Upfront Payment

.  

creditable amount equal to Seventeen Million Dollars ($17,000,000).  

7.1.1

[***] following the Effective Date, AbbVie shall pay Harpoon an upfront, non-refundable, non-

- 39 –

 
non-creditable upfront payment equal to Twenty Million Dollars ($20,000,000).

7.1.2

[***] after the Amended Effective Date, AbbVie shall pay Harpoon a one-time, non-refundable,

7.2

Development Milestones

.  In partial consideration of the rights granted by Harpoon to AbbVie hereunder and subject to the terms and conditions set forth
in this Agreement, AbbVie shall pay to Harpoon a non-refundable milestone payment within [***] after the achievement of each
of the following milestones for the first Licensed Product for each Accepted Target (irrespective of whether such Accepted Target
is an initially nominated Accepted Target, [***] or New Target), calculated as follows:  

7.2.1

7.2.2

upon [***] for the first Licensed Product for an Accepted Target, [***]; and

upon  [***]  for  the  first  Licensed  Product  that  [***]  for  an  Accepted  Target  [***],  [***];

provided, however, that if [***] for such Licensed Product, [***]:

achievement of [***].

(a)

(b)

in the amount of [***] upon the first achievement of such [***], if such [***]; or

in the amount of (i) [***] upon the first achievement of [***] upon the subsequent

On an Accepted Target-by-Accepted Target basis, if a development milestone payment set forth in this Section 7.2 for a Licensed
Product becomes due before an earlier listed development milestone payment for such Licensed Product, then the earlier listed
development milestone payment shall become payable upon the achievement of the later listed development milestone.

Each milestone payment in this Section 7.2 shall be payable only upon the first achievement of such milestone for an Accepted
Target  and  no  amounts  shall  be  due  for  subsequent  or  repeated  achievements  of  such  milestone,  whether  for  the  same  or  a
different Licensed Product targeting such Accepted Target.  The maximum aggregate amount payable by AbbVie pursuant to this 

- 40 –

 
Section 7.2 for each Accepted Target is [***] and for all Accepted Targets is [***].

7.3

Regulatory Milestones

.  In partial consideration of the rights granted by Harpoon to AbbVie hereunder and subject to the terms and conditions set forth
in this Agreement, AbbVie shall pay to Harpoon a non-refundable milestone payment within [***] after the achievement of each
of  the  following  milestones  for  each  Accepted  Target  (irrespective  of  whether  such  Accepted  Target  is  an  initially  nominated
Accepted Target, [***] or New Target), calculated as follows:

7.3.1

7.3.2

7.3.3

7.3.4

upon the [***] for a Licensed Product for an Accepted Target, [***];

upon the [***] for a Licensed Product for an Accepted Target, [***];

upon the [***] for a Licensed Product for an Accepted Target, [***]; and

upon the [***] for a Licensed Product for an Accepted Target, [***].

Each milestone payment in this Section 7.3 shall be payable only upon the first achievement of such milestone for an Accepted
Target  and  no  amounts  shall  be  due  for  subsequent  or  repeated  achievements  of  such  milestone,  whether  for  the  same  or  a
different Licensed Product targeting such Accepted Target.  The maximum aggregate amount payable by AbbVie pursuant to this
Section 7.3 for each Accepted Target is [***] and for all Accepted Targets is [***].

7.4

Commercialization Milestones

.  In partial consideration of the rights granted by Harpoon to AbbVie hereunder and subject to the terms and conditions set forth
in  this  Agreement,  AbbVie  shall  pay  to  Harpoon  the  following  non-refundable  milestone  payments  due  within  [***]  after  the
achievement of each of the following milestones for each Accepted Target (irrespective of whether such Accepted Target is an
initially nominated Accepted Target, [***] or New Target), calculated as follows:

7.4.1

7.4.2

upon the First Commercial Sale in [***] for an Accepted Target, [***];

upon the First Commercial Sale in [***] for an Accepted Target, [***]; 

- 41 –

 
7.4.3

7.4.4

upon the First Commercial Sale in [***] for an Accepted Target, [***]; and

upon the First Commercial Sale in [***] for an Accepted Target, [***].

Each milestone payment in this Section 7.4 shall be payable only upon the first achievement of such milestone for each Accepted
Target  and  no  amounts  shall  be  due  for  subsequent  or  repeated  achievements  of  such  milestone,  whether  for  the  same  or  a
different Licensed Product targeting such Accepted Target.  The maximum aggregate amount payable by AbbVie pursuant to this
Section 7.4 for each Accepted Target is [***] and for all Accepted Targets is [***].

7.5

Sales-Based Milestones

.  In partial consideration of the rights granted by Harpoon to AbbVie hereunder and subject to the terms and conditions set forth
in  this  Agreement,  AbbVie  shall  pay  to  Harpoon  the  following  non-refundable  milestone  payments  due  within  [***]  in  which
such  milestone  was  achieved  for  the  first  Licensed  Product  for  each  Accepted  Target  (irrespective  of  whether  such  Accepted
Target is an initially nominated Accepted Target, [***] or New Target), calculated as follows:

Affiliates or Sublicensees [***] equaling or exceeding [***];

7.5.1

upon the Net Sales in the Territory of a particular Licensed Product made by AbbVie or any of its

Affiliates or Sublicensees [***] equaling or exceeding [***];

7.5.2

upon the Net Sales in the Territory of a particular Licensed Product made by AbbVie or any of its

Affiliates or Sublicensees [***] equaling or exceeding [***]; and

7.5.3

upon the Net Sales in the Territory of a particular Licensed Product made by AbbVie or any of its

Affiliates or Sublicensees [***] equaling or exceeding [***].

7.5.4

upon the Net Sales in the Territory of a particular Licensed Product made by AbbVie or any of its

Each milestone payment in this Section 7.5 shall be payable only upon the first achievement of such milestone for each Accepted
Target  and  no  amounts  shall  be  due  for  subsequent  or  repeated  achievements  of  such  milestone,  whether  for  the  same  or  a
different Licensed Product targeting such Accepted Target.  The maximum aggregate amount payable by AbbVie pursuant to this
Section 7.5 for each Accepted Target is [***] and for all Accepted Targets is [***]. As used herein a particular Licensed Product
includes any Licensed Product that contains the same Discovery Construct.  

- 42 –

 
7.6

Royalties

.

7.6.1

Royalty Rates.  As further consideration for the rights granted to AbbVie hereunder, subject to
Section 7.6.3,  commencing  upon  the  First  Commercial  Sale  of  a  Licensed  Product  in  the  Territory,  on  a  Licensed  Product-by-
Licensed  Product  basis,  AbbVie  shall  pay  to  Harpoon  a  non-refundable  royalty  on  Net  Sales  of  each  Licensed  Product  in  the
Territory  (excluding  Net  Sales  of  each  Licensed  Product  in  any  country  or  other  jurisdiction  in  the  Territory  for  which  the
Royalty Term for such Licensed Product in such country or other jurisdiction has expired) during [***] at the following rates:

Net Sales in the Territory of each Licensed Product [***] in [***]

Royalty Rate

For that portion of aggregate Net Sales of each Licensed Product [***] in the
Territory during [***]

For that portion of aggregate Net Sales of each Licensed Product [***] in the
Territory during [***] but [***]

For that portion of aggregate Net Sales of each Licensed Product [***] in the
Territory during [***]

[***]

[***]

[***]

For the purposes of clarity, (a) all Licensed Products [***] shall be deemed to be the same Licensed Product for purposes of the
royalty tiers set forth in the table above, and (b) the royalty tiers set forth in the table above shall apply separately to Licensed
Products that [***].  For example, if Net Sales for a particular Licensed Product [***] during [***], and Net Sales for a Licensed
[***], then the Net Sales for such respective Licensed Products during [***] for purposes of the royalty tiers set forth in the table
above.

With respect to each Licensed Product in each country or other jurisdiction in the Territory, from and after the expiration of the
Royalty Term for such Licensed Product in such country or other jurisdiction, Net Sales of such Licensed Product in such country
or other jurisdiction shall be excluded for purposes of calculating the aggregate Net Sales amounts and applicable royalty rates
set forth in this Section 7.6.1.  

- 43 –

 
Royalty Term.  AbbVie shall have no obligation to pay any royalty with respect to Net Sales of
any Licensed Product in any country or other jurisdiction after the Royalty Term for such Licensed Product in such country or
other jurisdiction has expired.  

7.6.2

7.6.3

Reductions.  Notwithstanding the foregoing:

(a)

in  the  event  that  in  any  country  or  other  jurisdiction  in  the  Territory  during  the
Royalty Term for a Licensed Product there is Biosimilar Competition in such country or other jurisdiction, then for each such
country or other jurisdiction, the royalties payable to Harpoon for the Net Sales of such Licensed Product in such country or other
jurisdiction shall be reduced by [***] of the applicable royalty rate(s) set forth in Section 7.6.1.  For purposes herein, “Biosimilar
Competition” means, on a country or other jurisdiction and Licensed Product basis, [***] of such Licensed Product sold in that
country or other jurisdiction by AbbVie, its Affiliates and Sublicensees.  Unless otherwise agreed by the Parties, the [***] shall
be as [***] or any other [***] by the Parties;

AbbVie shall be entitled to deduct from [***] payable hereunder with respect to a
Licensed Product for a particular country or other jurisdiction [***] of all [***] paid under AbbVie In-License Agreements with
respect to such Licensed Product for such country or other jurisdiction; provided that in no case shall such deduction reduce such
[***] set forth in Section [7.2, 7.3, 7.4, 7.5 or 7.6.1], as applicable, [***];

(b)

calculating the royalties payable with respect to such Licensed Product under Section 7.6.1, [***]; and

(c)

[***]  in  a  country  or  other  jurisdiction  in  the  Territory,  then,  for  the  purposes  of

in  the  event  that,  and  in  such  case  from  and  after  the  date  on  which,  a  Licensed
Product is Exploited in a country or other jurisdiction and is not covered by a Valid Claim of a [***] Patent that covers (i) [***] in
such country or other jurisdiction or (ii) [***] such Licensed Product [***] in such country or other jurisdiction (provided that (A)
[***], or (B) [***], when [***]), the royalty rate set forth in Section 7.6.1 with 

(d)

- 44 –

 
respect to such country or other jurisdiction (for purposes of calculations under Section 7.6.1), shall be reduced [***].

7.7

Royalty Payments and Reports

.   AbbVie  shall  calculate  all  amounts  payable  to  Harpoon  pursuant  to  Section 7.6  at  the  end  of  each  Calendar  Quarter,  which
amounts shall be converted to Dollars, in accordance with Section 7.8.  AbbVie shall pay to Harpoon the royalty amounts due
with respect to a given Calendar Quarter within [***] after the end of such Calendar Quarter.  Each payment of royalties due to
Harpoon  shall  be  accompanied  by  a  statement  of  the  amount  of  Net  Sales  of  each  Licensed  Product  in  each  country  or  other
jurisdiction  the  Territory  during  the  applicable  Calendar  Quarter  (including  such  amounts  expressed  in  local  currency  and  as
converted to Dollars) and a calculation of the amount of royalty payment due on such Net Sales for such Calendar Quarter.

7.8

Mode of Payment; Offsets

.  All payments to either Party under this Agreement shall be made by deposit of Dollars in the requisite amount to such bank
account as the receiving Party may from time to time designate by notice to the paying Party.  For the purpose of calculating any
sums  due  under,  or  otherwise  reimbursable  pursuant  to,  this  Agreement  (including  the  calculation  of  Net  Sales  expressed  in
currencies other than Dollars), a Party shall convert any amount expressed in a foreign currency into Dollar equivalents using its,
its Affiliate’s or Sublicensee’s standard conversion methodology consistent with Accounting Standards.  [***]

7.9

Withholding Taxes

.  

7.9.1

Withholding Amounts.  Where any sum due to be paid to either Party hereunder is subject to
any withholding or similar tax, the Parties shall use their commercially reasonable efforts to do all such acts and things and to
sign all such documents as will enable them to take advantage of any applicable double taxation agreement or treaty.  In the event
there  is  no  applicable  double  taxation  agreement  or  treaty,  or  if  an  applicable  double  taxation  agreement  or  treaty  reduces  but
does  not  eliminate  such  withholding  or  similar  tax,  the  payor  shall  remit  such  withholding  or  similar  tax  to  the  appropriate
government  authority,  deduct  the  amount  paid  from  the  amount  due  to  payee  and  secure  and  send  to  payee  the  best  available
evidence  of  the  payment  of  such  withholding  or  similar  tax.    Any  such  amounts  deducted  by  the  payor  in  respect  of  such
withholding or similar tax shall be treated as having been paid by the payor for purposes of this Agreement.  If withholding or
similar taxes are paid to a government authority, each Party will provide the other such assistance as is reasonably required to
obtain  a  refund  of  the  withheld  or  similar  taxes,  or  to  obtain  a  credit  with  respect  to  such  taxes  paid.    In  the  event  that  a
government authority retroactively determines that a payment made by the paying Party to the receiving Party pursuant to this
Agreement should have been subject to withholding or similar (or to additional withholding or similar) taxes, and such paying
Party (the “Withholding Party”) remits such withholding or similar taxes to the government authority, including any interest and
penalties that may be imposed thereon (together with the tax paid, the “Withholding Amount”), the Withholding Party will have
the right (a) to offset the Withholding Amount against future payment obligations of the Withholding Party under this Agreement
or (b) to invoice the receiving Party for the Withholding Amount (which shall be payable by the receiving Party within [***] 

- 45 –

 
of its receipt of such invoice), or to pursue reimbursement of the Withholding Amount by any other available remedy.

7.9.2

Withholding Actions. Notwithstanding the foregoing, the Parties acknowledge and agree that if
AbbVie  (or  its  assignee  pursuant  to  Section  14.4)  is  required  by  Applicable  Law  to  withhold  taxes  in  respect  of  any  amount
payable under this Agreement, and if such withholding obligation arises as a result of any action taken by AbbVie or its Affiliate
or successor or assignee, including without limitation an assignment of this Agreement as permitted under Section 14.4 of this
Agreement, a change in tax residency of AbbVie, or payments arise or are deemed to arise through a branch of AbbVie and such
withholding taxes exceed the amount of withholding taxes that would have been applicable if such action had not occurred (each
an “AbbVie Withholding Tax Action”), then, any such amount payable shall be increased to take into account such increased
withholding  taxes  as  may  be  necessary  so  that,  after  making  all  required  withholdings  Harpoon  (or  its  assignee  pursuant  to
Section  14.4)  receives  an  amount  equal  to  the  sum  it  would  have  received  had  no  such  AbbVie  Withholding  Tax  Action
occurred.  [***].

7.10

Indirect Taxes

. Except  as  otherwise  provided  in  this  Agreement,  all  payments  due  under  this  Agreement  are  exclusive  of  value  added  taxes,
sales taxes, consumption taxes and other similar taxes (the “Indirect Taxes”).  Notwithstanding anything to the contrary in this
Agreement,  AbbVie  shall  be  responsible  for  any  Indirect  Taxes  as  well  as  any  transfer,  documentary,  sales  use,  stamp,
registration, value added or other similar tax that is imposed with respect to the payments or the related transfer of rights or other
property pursuant to the terms of this Agreement.  If the Indirect Taxes originally paid or otherwise borne by the paying Party are
in  whole  or  in  part  subsequently  determined  not  to  have  been  chargeable,  all  reasonably  necessary  steps  will  be  taken  by  the
receiving  Party  to  receive  a  refund  of  these  undue  Indirect  Taxes  from  the  applicable  governmental  authority  or  other  fiscal
authority and any amount of undue Indirect Taxes repaid by such authority to the receiving Party will be transferred to the paying
Party within [***] of receipt.

7.11

Interest on Late Payments

.  If any payment due to either Party under this Agreement is not paid when due, then such paying Party shall pay interest thereon
(before  and  after  any  judgment)  at  [***],  such  interest  to  run  from  the  date  on  which  payment  of  such  sum  became  due  until
payment thereof in full together with such interest.

7.12

Audit

.   AbbVie  shall,  shall  cause  its  Affiliates  to,  and  shall  use  commercially  reasonable  efforts  to  cause  its  Sublicensees  to  keep
complete and accurate books and records pertaining to Net Sales of Licensed Products in sufficient detail to calculate all amounts
payable  hereunder.    At  the  request  of  Harpoon,  AbbVie  shall  permit  an  independent  public  accounting  firm  of  nationally
recognized  standing  designated  by  Harpoon  and  reasonably  acceptable  to  AbbVie,  at  reasonable  times  during  normal  business
hours and upon reasonable notice, to audit the books and records maintained pursuant to this Section 7.12 to ensure the accuracy
of all reports and payments made hereunder.  Such examinations may not (a) be conducted for any Calendar Quarter [***], (b) be
conducted more than once in any [***]

- 46 –

 
[***] period or (c) be [***].  The accounting firm shall disclose to Harpoon only whether the reports are correct or not, and the
specific details concerning any discrepancies.  No other information shall be shared.  Except as provided below, the cost of this
audit shall be borne  by Harpoon,  unless  the  audit  reveals  a  variance  [***]  from  the  reported  amounts  or  [***],  in  which  case
AbbVie shall bear the cost of the audit.

7.13

Audit Dispute

. In the event of a dispute with respect to any audit under Section 7.12, Harpoon and AbbVie shall work in good faith to resolve
the disagreement.  If the Parties are unable to reach a mutually acceptable resolution of any such dispute within [***], the dispute
shall be submitted for resolution to a certified public accounting firm jointly selected by each Party’s certified public accountants
or to such other Person as the Parties shall mutually agree (the “Audit Expert”).  The decision of the Audit Expert shall be final
and the costs of such arbitration as well as the initial audit shall be borne between the Parties in such manner as the Audit Expert
shall determine.  Not later than [***] after such decision and in accordance with such decision, AbbVie shall pay the additional
amounts or Harpoon shall reimburse the excess payments, as applicable.

7.14

Confidentiality

.  The receiving Party shall treat all information subject to review under this ARTICLE 7 in accordance with the confidentiality
provisions  of  ARTICLE  10  and  the  Parties  shall  cause  the  Audit  Expert  to  enter  into  a  reasonably  acceptable  confidentiality
agreement  with  AbbVie  obligating  such  firm  to  retain  all  such  financial  information  in  confidence  pursuant  to  such
confidentiality agreement.

7.15

[***]

.    The  development  milestone  payments,  regulatory  milestone  payments,  commercialization  milestone  payments,  sales-based
milestone payments and royalties in Sections 7.2, 7.3, 7.4, 7.5 and 7.6 shall not apply to Development and Commercialization of
Discovery Constructs or Licensed  Products  [***]  a  Discovery  Construct  or Licensed  Product  or  [***]  Discovery  Construct  or
Licensed Product.  In the event that a Discovery Construct or Licensed Product is Developed for any such purposes, [***] for the
sale of such Licensed Product that [***] such Licensed Product and [***], as applicable, provided that, for clarity, any such [***]
under this Agreement with respect to Discovery Constructs or Licensed Products that are [***].

7.16

No Other Compensation

.  Each Party hereby agrees that the terms of this Agreement fully define all consideration, compensation and benefits, monetary
or otherwise, to be paid, granted or delivered by one (1) Party to the other Party in connection with the transactions contemplated
herein. Neither Party previously has paid or entered into any other commitment to pay, whether orally or in writing, any of the
other Party’s employees, directly or indirectly, any 

- 47 –

 
consideration, compensation or benefits, monetary or otherwise, in connection with the transaction contemplated herein.

ARTICLE 8
INTELLECTUAL PROPERTY  

8.1

Ownership of Intellectual Property

.

Harpoon Ownership.  As between the Parties, Harpoon shall own all right, title and interest in
and  to  any  and  all  Harpoon  Background  Patents,  Harpoon  Background  Know-How,  Harpoon  Program  Patents  and  Harpoon
Program Know-How.  

8.1.1

AbbVie Ownership.  As between the Parties, AbbVie or an Affiliate designated by AbbVie shall
own and retain all right, title, and interest in and to any and all AbbVie Background Patents, AbbVie Background Know-How,
AbbVie Program Patents, AbbVie Program Know-How, Product-Specific Know-How and Product-Specific Patents.

8.1.2

8.1.3

Ownership  of  Joint  Program  Patents  and  Joint  Program  Know-How.    Subject  to  Section
4.7.1(b), as between the Parties, each Party shall own an equal, undivided interest in any and all Joint Program Patents and Joint
Program  Know-How.    Subject  to  the  licenses  and  rights  of  reference  granted  under  Sections  6.1  and  6.2  and  Harpoon’s
exclusivity obligations hereunder, each Party shall have the right to Exploit the Joint Intellectual Property Rights without a duty
of seeking consent from or accounting to the other Party.

8.1.4

United  States  Law.  The  determination  of  whether  Information  and  inventions  are  conceived,
discovered, developed, or otherwise made by a Party for the purpose of allocating proprietary rights (including Patent, copyright
or other intellectual property rights) therein, shall, for purposes of this Agreement, be made in accordance with Applicable Law
in the United States.

8.1.5

Assignment Obligation.

(a)

Each Party shall cause all Persons who perform activities for such Party under this
Agreement  to  be  under  an  obligation  to  assign  (or,  if  such  Party  is  unable  to  cause  such  Person  to  agree  to  such  assignment
obligation despite such Party’s using commercially reasonable efforts to negotiate such assignment obligation, provide a license
under) their rights in any Information and inventions resulting therefrom to such Party, except where Applicable Law requires
otherwise and except in the case of governmental, not-for-profit and public institutions which have standard policies against such
an assignment (in which case a suitable license, or right to obtain such a license, shall be obtained).

AbbVie  will  promptly  disclose  to  Harpoon  in  writing,  the  conception,  discovery,
development  or  making  of  any  Harpoon  Program  Know-How,  Harpoon  Program  Patents,  Product-Specific  Know-How  and
Product-Specific Patents by Persons who perform activities for AbbVie under this Agreement.  AbbVie, for itself and on behalf of
its  Affiliates,  hereby  assigns  (and  to  the  extent  such  assignment  can  only  be  made  in  the  future  hereby  agrees  to  assign),  to
Harpoon all its right, title and interest in and to any Harpoon Program Know-

(b)

- 48 –

 
How and Harpoon Program Patents.  AbbVie will execute and record assignments and other necessary documents consistent with
such ownership promptly upon request.  

(c)

Harpoon  will  promptly  disclose  to  AbbVie  in  writing,  the  conception,  discovery,
development  or  making  of  any  AbbVie  Program  Know-How,  AbbVie  Program  Patents,  Product-Specific  Know-How  and
Product-Specific Patents by Persons who perform activities for Harpoon under this Agreement.  Harpoon, for itself and on behalf
of its Affiliates, hereby assigns (and to the extent such assignment can only be made in the future hereby agrees to assign), to
AbbVie  all  its  right,  title  and  interest  in  and  to  any  AbbVie  Program  Know-How,  AbbVie  Program  Patents,  Product-Specific
Know-How  and  Product-Specific  Patents.    Harpoon  will  execute  and  record  assignments  and  other  necessary  documents
consistent with such ownership promptly upon request.  

Each  Party  will  promptly  disclose  to  the  other  Party  in  writing,  the  conception,
discovery, development or making of any Joint Program Know-How or Joint Program Patents by Persons who perform activities
for it under this Agreement.  Each Party will execute and record assignments and other necessary documents consistent with such
ownership promptly upon request.

(d)

8.2

Maintenance and Prosecution of Patents

.

8.2.1

Patent Prosecution and Maintenance of Harpoon Background Patents.  Harpoon shall have
the sole right, but not the obligation, through the use of internal or outside counsel, to prepare, file, prosecute, and maintain the
Harpoon Background Patents worldwide, at Harpoon’s sole cost and expense.  Harpoon shall keep AbbVie informed regarding
each  Harpoon  Background  Patent  relating  to  use  of  the  Harpoon  Platform  incorporating  a  T-Cell  Receptor  or  Antibody  that
Harpoon is prosecuting, and shall provide copies to AbbVie of all material communications sent to such patent offices by or on
behalf of Harpoon.

8.2.2

Patent  Prosecution  and  Maintenance  of  Harpoon  Program  Patents.  In  consultation  with
AbbVie, Harpoon shall have the right, but not the obligation, through the use of internal or outside counsel reasonably acceptable
to  AbbVie,  to  prepare,  file,  prosecute,  and  maintain  the  Harpoon  Program  Patents  worldwide,  at  Harpoon’s  sole  cost  and
expense.  Harpoon shall [***] with regard to the preparation, filing, prosecution, and maintenance of Harpoon Program Patents,
including  by  providing  AbbVie  with  a  copy  of  material  communications  to  and  from  any  patent  authority  in  the  Territory
regarding such Harpoon Program Patents, and by providing AbbVie drafts of any material filings or responses to be made to such
patent authorities in the Territory sufficiently in advance of submitting such filings or responses so as to allow for a reasonable
opportunity  for  AbbVie  to  review  and  comment  thereon.  Harpoon  shall  consider  in  good  faith  the  requests  and  suggestions  of
AbbVie with respect to such Harpoon drafts and with respect to strategies for filing and prosecuting the Harpoon Program Patents
in  the  Territory.    Notwithstanding  the  foregoing,  Harpoon  shall  promptly  inform  AbbVie  of  any  adversarial  patent  office
proceeding or sua sponte filing, including a request for, or filing of or declaration of, any interference, opposition, Third Party
observation,  derivation  proceeding,  post  grant  review,  supplementary  examination,  reissue  or  inter  parte  or  ex  parte
reexamination  relating  to  a  Harpoon  Program  Patent  in  the  Territory.    The  Parties  shall  thereafter  consult  and  cooperate  to
determine a course of action with respect to any 

- 49 –

 
such proceeding in the Territory and Harpoon shall consider in good faith all comments, requests and suggestions provided by
AbbVie. [***]

8.2.3

Patent  Prosecution  and  Maintenance  of  AbbVie  Background  Patents,  AbbVie  Program
Patents  and  Joint  Program  Patents.    AbbVie  shall  have  the  right,  but  not  the  obligation,  to  prepare,  file,  prosecute,  and
maintain the AbbVie Background Patents and AbbVie Program Patents worldwide, at AbbVie’s sole cost and expense. AbbVie
shall have the first right, but not the obligation, to prepare, file, prosecute, and maintain the Joint Program Patents worldwide, at
AbbVie’s sole cost and expense.  AbbVie shall keep Harpoon fully informed of all material steps with regard to the preparation,
filing,  prosecution,  and  maintenance  of  AbbVie  Program  Patents  and  Joint  Program  Patents,  including  by  providing  Harpoon
with a copy of material communications to and from any patent authority in the Territory regarding such AbbVie Program Patents
and  Joint  Program  Patents,  and  by  providing  Harpoon  drafts  of  any  material  filings  or  responses  to  be  made  to  such  patent
authorities  in  the  Territory  sufficiently  in  advance  of  submitting  such  filings  or  responses  so  as  to  allow  for  a  reasonable
opportunity for Harpoon to review and comment thereon.  AbbVie shall consider in good faith the requests and suggestions of
Harpoon with respect to such AbbVie drafts and with respect to strategies for filing and prosecuting the AbbVie Program Patents
and Joint Program Patents in the Territory.  In the event that AbbVie decides not to prepare, file, prosecute, or maintain a Joint
Program Patent in a country or other jurisdiction in the Territory, AbbVie shall provide reasonable prior written notice to Harpoon
of such intention (which notice shall, in any event, be given no later than [***] prior to the next deadline for any action that may
be taken with respect to such Joint Program Patent in such country or other jurisdiction), and Harpoon shall thereupon have the
option, in its sole discretion, to assume the control and direction of the preparation, filing, prosecution, and maintenance of such
Joint Program Patent at its sole cost and expense in such country or other jurisdiction.  Upon Harpoon’s written acceptance of
such option, Harpoon shall assume the responsibility and control for the preparation, filing, prosecution, and maintenance of such
specific  Joint  Program  Patent.    In  such  event,  AbbVie  shall  reasonably  cooperate  with  Harpoon  in  such  country  or  other
jurisdiction as provided under Section 8.2.5.

8.2.4

Patent Prosecution and Maintenance of Product-Specific Patents. AbbVie shall have the first
right, but not the obligation, to prepare, file, prosecute, and maintain the Product-Specific Patents worldwide, at AbbVie’s sole
cost  and  expense.    AbbVie  shall  keep  Harpoon  fully  informed  of  all  material  steps  with  regard  to  the  preparation,  filing,
prosecution,  and  maintenance  of  Product-Specific  Patents,  including  by  providing  Harpoon  with  a  copy  of  material
communications  to  and  from  any  patent  authority  in  the  Territory  regarding  such  Product-Specific  Patents,  and  by  providing
Harpoon drafts of any material filings or responses to be made to such patent authorities in the Territory sufficiently in advance of
submitting  such  filings  or  responses  so  as  to  allow  for  a  reasonable  opportunity  for  Harpoon  to  review  and  comment  thereon,
which in any event shall be at least [***] prior to any such submission.  AbbVie shall consider in good faith the requests and
suggestions of Harpoon with respect to such AbbVie drafts and with respect to strategies for filing and prosecuting the Product-
Specific Patents in the Territory.  In the event that AbbVie decides not to prepare, file, prosecute, or maintain a Product-Specific
Patent in a country or other jurisdiction in the Territory, AbbVie shall provide reasonable prior written notice to Harpoon of such
intention (which notice shall, in any event, be given no later than [***]

- 50 –

 
[***] prior to the next deadline for any action that may be taken with respect to such Product-Specific Patent in such country or
other jurisdiction), and Harpoon shall thereupon have the option, in its sole discretion, to assume the control and direction of the
preparation, filing, prosecution, and maintenance of such Product-Specific Patent at its sole cost and expense in such country or
other jurisdiction.  Upon Harpoon’s written acceptance of such option, Harpoon shall assume the responsibility and control for
the  preparation,  filing,  prosecution,  and  maintenance  of  such  specific  Product-Specific  Patent.    In  such  event,  AbbVie  shall
reasonably  cooperate  with  Harpoon  in  such  country  or  other  jurisdiction  as  provided  under  Section  8.2.5.    Notwithstanding
anything  to  the  contrary  in  this  Agreement,  each  Party  agrees  that  [***].  Subject  to  Section  13.6.2,  if  this  Agreement  is
terminated  (in  its  entirety  or  otherwise),  with  respect  to  an  Accepted  Target,  the  applicable  Product-Specific  Patents  claiming
Discovery Constructs or Licensed Products directed to such Accepted Target shall be [***].

Cooperation.    The  Parties  agree  to  cooperate  fully  in  the  preparation,  filing,  prosecution,  and
maintenance of the Harpoon Program Patents, AbbVie Program Patents, Product-Specific Patents and Joint Program Patents in
the Territory under this Agreement.  Cooperation shall include:

8.2.5

without  limiting  any  other  rights  and  obligations  of  the  Parties  under  this
Agreement, cooperating with respect to the timing, scope and filing of such Patents to preserve and enhance the patent protection
for Discovery Constructs and Licensed Products, including the manufacture and use thereof.

(a)

(b)

executing  all  papers  and  instruments,  or  requiring  its  employees  or  contractors  to
execute such papers and instruments, so as to (i) effectuate the ownership of intellectual property set forth in Section 8.1.1, 8.1.2
and  8.1.3;  (ii)  enable  the  other  Party  to  apply  for  and  to  prosecute  Patent  applications  in  the  Territory;  and  (iii)  obtain  and
maintain any Patent extensions, supplementary protection certificates, and the like with respect to the Harpoon Program Patents,
AbbVie Program Patents, Product-Specific Patents and Joint Program Patents in the Territory, in each case ((i), (ii), and (iii)) to
the extent provided for in this Agreement;

consistent with this Agreement, assisting in any license registration processes with
applicable  governmental  authorities  that  may  be  available  in  the  Territory  for  the  protection  of  a  Party’s  interests  in  this
Agreement; and

(c)

that may materially affect the preparation, filing, prosecution, or maintenance of any such Patents in the Territory.

(d)

promptly informing the other Party of any matters coming to such Party’s attention

- 51 –

 
8.2.6

Patent  Term  Extension  and  Supplementary  Protection  Certificate.  AbbVie  shall  be
responsible for making decisions regarding patent term extensions, including supplementary protection certificates and any other
extensions  that  are  now  or  become  available  in  the  future,  wherever  applicable,  for  AbbVie  Background  Patents,  AbbVie
Program Patents, Product-Specific Patents and Joint Program Patents in any country or other jurisdiction and for applying for any
extension or supplementary protection certificate with respect to such Patents in the Territory.  Harpoon shall provide prompt and
reasonable  assistance,  as  requested  by  AbbVie,  including  by  taking  such  action  as  patent  holder  as  is  required  under  any
Applicable Law to obtain such patent extension or supplementary protection certificate.  AbbVie shall pay all expenses in regard
to  obtaining the extension  or  supplementary  protection  certificate  in  the  Territory.    In  case  that  AbbVie  determines  that  patent
term extension should be applied for a Harpoon Program Patent or a Harpoon Background Patent, Harpoon and AbbVie should
discuss in good faith with respect to such patent term extension.

8.2.7

European Patents.  AbbVie shall have the sole right to decide whether a European Patent within
Joint Program Patents should be validated or maintained as a Unitary Patent, whether and when such European Patent should be
opted out of or opted in to the jurisdiction of the Unified Patent Court (UPC) (including withdrawal of an opt-out), as well as any
other issues concerning the jurisdiction of the UPC in connection with Joint Program Patents.  Harpoon shall, at AbbVie’s cost
and  expense,  cooperate  with  AbbVie  and  provide  to  AbbVie  and  submit  to  authorities  all  necessary  documents  to  effect  such
decision.

8.2.8

Patent Listings.  AbbVie will have the sole right to make all filings with Regulatory Authorities
in  the  Territory  with  respect  to  AbbVie  Background  Patents,  AbbVie  Program  Patents,  Product-Specific  Patents  and  Joint
Program Patents, including as required or allowed under Applicable Law, provided that with respect to Joint Program Patents,
such right shall be solely with respect to Licensed Products.  AbbVie shall notify Harpoon in writing of any Harpoon Background
Patents or Harpoon Program Patents that it intends to list with Regulatory Authorities related to the Licensed Products and, prior
to filing any such listing, consult with and consider in good faith the requests and suggestions of Harpoon regarding the same.

8.3

Enforcement of Patents

.

8.3.1

Enforcement of Harpoon Background Patents and Harpoon Program Patents.  

Each  Party  shall  promptly  notify  the  other  Party  in  writing  of  any  alleged  or
threatened  infringement  of  the  Harpoon  Background  Patents  or  Harpoon  Program  Patents  by  a  Third  Party  in  the  Territory  of
which such Party becomes aware based on the development, commercialization, or an application to market a product containing
a Discovery Construct or any Licensed Product in the Territory (the “Product Infringement”).

(a)

Harpoon shall have the sole right, but not the obligation, to prosecute any Product
Infringement  involving  any  claims  of  Harpoon  Background  Patents  and  Harpoon  Program  Patents  at  its  sole  expense  and
Harpoon shall retain control of the prosecution of such claim, suit or proceeding.

(b)

- 52 –

 
Patents and Joint Program Patents.  

8.3.2

Enforcement  of  AbbVie  Background  Patents,  AbbVie  Program  Patents,  Product-Specific

Each  Party  shall  promptly  notify  the  other  Party  in  writing  of  any  alleged  or
threatened infringement of the AbbVie Background Patents, AbbVie Program Patents, Product-Specific Patents or Joint Program
Patents by a Third Party in the Territory of which such Party becomes aware (including alleged or threatened infringement based
on the development, commercialization, or an application to market a product containing a Discovery Construct or any Licensed
Product in the Territory).  

(a)

AbbVie  shall  have  the  sole  right,  but  not  the  obligation,  to  prosecute  any  such
infringement of AbbVie Background Patents, AbbVie Program Patents and Product-Specific Patents in the Territory at its sole
expense and AbbVie shall retain control of the prosecution of such claim, suit or proceeding.

(b)

(c)

AbbVie  shall  have  the  first  right,  but  not  the  obligation,  to  prosecute  any  such
infringement of Joint Program Patents in the Territory at its sole expense and AbbVie shall retain control of the prosecution of
such claim, suit or proceeding.  In the event AbbVie prosecutes any such infringement, Harpoon shall have the right to join as a
party  to  such  claim,  suit  or  proceeding  in  the  Territory  and  participate  with  its  own  counsel  at  its  own  expense;  provided  that
AbbVie  shall  retain  control  of  the  prosecution  of  such  claim,  suit  or  proceeding.    If  AbbVie  does  not  take  commercially
reasonable steps to prosecute the alleged or threatened infringement in the Territory with respect to such Joint Program Patents
(i) within [***] following the first notice provided above with respect to such alleged infringement, or (ii) provided such date
occurs after the first such notice of infringement is provided, [***] before the time limit, if any, set forth in appropriate laws and
regulations for filing of such actions, whichever comes first, then Harpoon may prosecute the alleged or threatened infringement
in the Territory at its own expense.  

8.3.3

Patent Exclusivity Listings.  If  either  Party  receives  a  copy  of  an  application  submitted  to  the
FDA under subsection (k) of Section 351 of the PHSA (a “Biosimilar Application”) naming a Licensed Product as a reference
product or otherwise becomes aware that such a Biosimilar Application has been filed (such as in an instance described in Section
351(l)(9)(C) of the PHSA), such Party shall, within [***], notify the other Party so that the other Party may seek permission to
view the application and related confidential information from the filer of the Biosimilar Application under Section 351(l)(1)(B)
(iii) of the PHSA.  If either Party receives any equivalent or similar certification or notice in any other jurisdiction in the Territory,
either Party shall, within [***], notify and provide the other Party with copies of such communication.  Regardless of the Party that
is the “reference product sponsor” for purposes of such Biosimilar Application, (a) [***]; (b) AbbVie shall have the right to list
any AbbVie Background Patents, AbbVie Program Patents, Product-Specific Patents, Joint Program Patents, and, upon the written
consent of Harpoon, such consent not to be unreasonably withheld, conditioned or delayed (taking into account, without limitation,
the  potential  impact  of  such  consent  on  other  products  undergoing  development  or  commercialization  by  Harpoon  or  its  Third
Party licensees and covered by such Harpoon Program Patents), Harpoon 

- 53 –

 
Program Patents, and upon the written consent of Harpoon, Harpoon Background Patents, insofar as they cover the applicable
Licensed Product as required pursuant to Section 351(l)(3)(A), Section 351(l)(5)(b)(i)(II), or Section 351(l)(7) of the PHSA, to
respond to any communications with respect to such lists from the filer of the Biosimilar Application, and to negotiate with the
filer of the Biosimilar Application as to whether to utilize a different mechanism for information exchange than that specified in
Section 351(l) of the PHSA; and (c) [***] shall have the sole right to identify such Patents or respond to communications under
any  equivalent  or  similar  listing  in  any  other  jurisdiction  in  the  Territory.    If  required  pursuant  to  Applicable  Law,  [***]  shall
prepare  such  lists  and  make  such  responses  [***].    If  Harpoon  has  provided  written  consent  as  contemplated  by  this  Section
8.3.3,  Harpoon  shall  cooperate  with  AbbVie’s  reasonable  requests  in  connection  therewith,  including  meeting  any  submission
deadlines,  in  each  case,  to  the  extent  required  or  permitted  by  Applicable  Law.    AbbVie  shall  (A)  reasonably  consult  with
Harpoon prior to [***] to a Third Party as contemplated by this Section 8.3.3 and shall consider in good faith Harpoon’s advice,
requests and suggestions with respect thereto, and (B) notify Harpoon of any such lists or communications promptly after they
are made.

8.3.4

Conduct  of  Patent  Litigation  Under  the  Biologics  Price  Competition  and  Innovation
Act.    Notwithstanding  anything  to  the  contrary  in  this  Section  8.3,  AbbVie  shall  have  the  first  right  to  bring  an  action  for
infringement of the AbbVie Background Patents, AbbVie Program Patents, Product-Specific Patents, Joint Program Patents and,
upon the written consent of Harpoon, such consent not to be unreasonably withheld, conditioned or delayed (taking into account,
without  limitation,  the  potential  impact  of  such  consent  on  other  products  undergoing  development  or  commercialization  by
Harpoon or its Third Party licensees and covered by such Harpoon Program Patents), Harpoon Program Patents, and upon the
written  consent  of  Harpoon,  Harpoon  Background  Patents,  as  required  under  Section  351(l)(6)  of  the  PHSA  following  the
agreement on a list of patents for litigation under Section 351(l)(4) or exchange of Patent lists pursuant to Section 351(l)(5)(B) of
such act, or as required following any equivalent or similar certification or notice in any other jurisdiction.  The Parties’ rights
and  obligations  with  respect  to  the  foregoing  legal  actions  shall  be  as  set  forth  in  Sections 8.3.1  through  8.3.5;  provided,  that
within [***] of reaching agreement on a list of Patents for litigation under Section 351(l)(4) or exchange of Patent lists pursuant
to Section 351(l)(5)(B), AbbVie shall notify Harpoon as to whether or not it elects to prosecute such infringement.  Either Party
shall, within [***], notify and provide the other Party with copies of any notice of commercial marketing provided by the filer of
a Biosimilar Application pursuant to Section 351(l)(8)(A) of the PHSA, or any equivalent or similar certification or notice in any
other jurisdiction.  Thereafter, the Party controlling any Patent infringement litigation pursuant to this Section 8.3.4 shall have the
first right to seek an injunction against such commercial marketing as permitted pursuant to Section 351(l)(8)(B) of the PHSA.  If
no such litigation is ongoing at the time of such notice, then [***] shall have the first right to seek such an injunction.

8.3.5

Cooperation.   The  Parties  agree  to  cooperate  fully  in  any  infringement  action  pursuant  to  this
Section 8.3.  Where a Party brings such an action, the other Party shall, where necessary, furnish a power of attorney solely for
such  purpose  or  shall  join  in,  or  be  named  as  a  necessary  party  to,  such  action.    Unless  otherwise  set  forth  herein,  the  Party
entitled to bring any patent infringement litigation in accordance with this Section 8.3 shall have the right to settle 

- 54 –

 
such claim; provided that neither Party shall have the right to settle any patent infringement litigation under this Section 8.3 in a
manner that materially diminishes or has a material adverse effect on the rights or interest of the other Party, or in a manner that
imposes any costs or liability on, or involves any admission by, the other Party, without the express written consent of such other
Party.  The Party commencing the litigation shall provide the other Party with copies of all pleadings and other documents filed
with the court and shall consider reasonable input from the other Party during the course of the proceedings.

Recovery. Any recovery realized as a result of such litigation described in Sections 8.3.1, 8.3.2,
or 8.3.4 (whether by way of settlement or otherwise) shall be first allocated to reimburse the Parties for their costs and expenses
in making such recovery (which amounts shall be allocated pro rata if insufficient to cover the totality of such expenses).  [***].

8.3.6

8.4

Infringement Claims by Third Parties

.  If the manufacture, sale, or use of a Discovery Construct or Licensed Product in the Territory pursuant to this Agreement results
in, or may result in, any claim, suit, or proceeding by a Third Party alleging patent infringement by AbbVie (or its Affiliates or
Sublicensees), AbbVie shall promptly notify Harpoon thereof in writing.  AbbVie shall have the first right, but not the obligation,
to  defend  and  control  the  defense  of  any  such  claim,  suit,  or  proceeding  at  its  own  expense,  using  counsel  of  its  own
choice.  Harpoon may participate in any such claim, suit, or proceeding with counsel of its choice at its own expense.  Without
limitation of the foregoing, if AbbVie finds it necessary or desirable to join Harpoon as a party to any such action, Harpoon shall,
at AbbVie’s expense, execute all papers and perform such acts as shall be reasonably required.  If AbbVie elects (in a written
communication submitted to Harpoon within a reasonable amount of time after notice of the alleged patent infringement) not to
defend or control the defense of, or otherwise fails to initiate and maintain the defense of, any such claim, suit, or proceeding,
within such time periods so that Harpoon is not prejudiced by any delays, Harpoon may conduct and control the defense of any
such  claim,  suit,  or  proceeding  at  its  own  expense.    Each  Party  shall  keep  the  other  Party  reasonably  informed  of  all  material
developments in connection with any such claim, suit, or proceeding.  [***] under this Section 8.4 shall be [***]

8.5

Invalidity or Unenforceability Defenses or Actions

.

Notice.  Each Party shall promptly notify the other Party in writing of any alleged or threatened
assertion  of  invalidity  or  unenforceability  of  any  of  the  Harpoon  Background  Patents,  Harpoon  Program  Patents,  AbbVie
Background Patents, AbbVie Program 

8.5.1

- 55 –

 
Patents, Product-Specific Patents or Joint Program Patents by a Third Party, in each case in the Territory and of which such Party
becomes aware.

Harpoon  Background  Patents.    Harpoon  shall  have  the  sole  right,  but  not  the  obligation,  to
defend and control the defense of the validity and enforceability of the Harpoon Background Patents at its own expense in the
Territory.

8.5.2

8.5.3

Harpoon Program Patents. Harpoon shall have the first right, but not the obligation, to defend
and  control  the  defense  of  the  validity  and  enforceability  of  the  Harpoon  Program  Patents  at  its  own  expense  in  the
Territory.  AbbVie may participate in any such claim, suit, or proceeding in the Territory with counsel of its choice at its own
expense; provided that Harpoon shall retain control of the defense in such claim, suit, or proceeding.  If Harpoon elects not to
defend or control the defense of such Harpoon Program Patents in a suit brought in the Territory, or otherwise fails to initiate and
maintain the defense of any such claim, suit, or proceeding, then AbbVie may conduct and control the defense of any such claim,
suit,  or  proceeding  at  its  own  expense;  provided,  that  AbbVie  shall  obtain  the  written  consent  of  Harpoon  prior  to  settling  or
compromising such defense.

Program Patents.

8.5.4

AbbVie Background Patents, AbbVie Program Patents, Product-Specific Patents and Joint

AbbVie  shall  have  the  sole  right,  but  not  the  obligation,  to  defend  and  control  the
defense  of  the  validity  and  enforceability  of  the  AbbVie  Background  Patents,  AbbVie  Program  Patents  and  Product-Specific
Patents at its own expense in the Territory.

(a)

(b)

AbbVie shall have the first right, but not the obligation, to defend and control the
defense  of  the  validity  and  enforceability  of  the  Joint  Program  Patents  at  its  own  expense  in  the  Territory.    Harpoon  may
participate in any such claim, suit, or proceeding in the Territory related to the Joint Program Patents with counsel of its choice at
its own expense; provided that AbbVie shall retain control of the defense in such claim, suit, or proceeding.  If AbbVie elects not
to defend or control the defense of the Joint Program Patents in a suit brought in the Territory, or otherwise fails to initiate and
maintain  the  defense  of  any  such  claim,  suit,  or  proceeding,  then  Harpoon  may  conduct  and  control  the  defense  of  any  such
claim, suit, or proceeding, at its own expense; provided, that Harpoon shall obtain the written consent of AbbVie prior to settling
or compromising such defense.

8.5.5

Cooperation. Each Party shall assist and cooperate with the other Party as such other Party may
reasonably request from time to time in connection with its activities set forth in this Section 8.5, including by being joined as a
party  plaintiff  in  such  action  or  proceeding,  providing  access  to  relevant  documents  and  other  evidence,  and  making  its
employees available at reasonable business hours.  In connection with any such defense or claim or counterclaim, the controlling
Party shall consider in good faith any comments from the other Party and shall keep the other Party reasonably informed of any
steps  taken,  and  shall  provide  copies  of  all  documents  filed,  in  connection  with  such  defense,  claim,  or  counterclaim.    In
connection with the activities set forth in this Section 8.5, each Party shall consult with the other as to the strategy for the defense
of the Harpoon Program Patents, AbbVie Program Patents, Product-Specific Patents and Joint Program Patents.

- 56 –

 
8.6

Third Party Licenses

.  If [***], the Development, Manufacture, or Commercialization of any Discovery Construct or Licensed Product by AbbVie,
any of its Affiliates, or any of its or their Sublicensees infringes or misappropriates any [***] of a Third Party in any country or
other  jurisdiction  in  the  Territory,  such  that  AbbVie,  any  of  its  Affiliates  or  any  of  its  or  their  Sublicensees  cannot  Develop,
Manufacture,  or  Commercialize  such  Discovery  Construct  or  Licensed  Product  in  such  country  or  other  jurisdiction  without
infringing  such  [***]  of  such  Third  Party,  then  [***],  and  [***]  shall  promptly  provide  [***]  with  written  notice  of  any  such
license, including the identity of the counter-party and a description of the [***].

8.7

Product Trademarks

.  As between the Parties, AbbVie shall own all right, title, and interest to the Product Trademarks in the Territory, and shall be
responsible  for  the  registration,  prosecution,  maintenance  and  enforcement  thereof.    All  costs  and  expenses  of  registering,
prosecuting,  maintaining  and  enforcing  the  Product  Trademarks  shall  be  borne  solely  by  AbbVie.    Harpoon  shall  provide  all
assistance  and  documents  reasonably  requested  by  AbbVie  in  support  of  its  prosecution,  registration,  maintenance  and
enforcement of the Product Trademarks.

8.8

Inventor’s Remuneration

.    Each  Party  shall  be  solely  responsible  for  any  remuneration  that  may  be  due  such  Party's  inventors  under  any  applicable
inventor remuneration laws.

8.9

Common Interest

.   All  information  exchanged  between  the  Parties  regarding  the  prosecution,  maintenance,  enforcement  and  defense  of  Patents
under  this  ARTICLE  8  will  be  deemed  to  be  Confidential  Information  of  the  disclosing  Party.    In  addition,  the  Parties
acknowledge and agree that, with regard to such prosecution, maintenance, enforcement and defense, the interests of the Parties
as collaborators and Harpoon and licensee are to, for their mutual benefit, obtain patent protection and plan patent defense against
potential  infringement  activities  by  Third  Parties,  and  as  such,  are  aligned  and  are  legal  in  nature.    The  Parties  agree  and
acknowledge that they have not waived, and nothing in this Agreement constitutes a waiver of, any legal privilege concerning
interest  doctrine  and  similar  or  related
Patents  under  this  ARTICLE  8, 
doctrines.    Notwithstanding  anything  to  the  contrary  in  this  Agreement,  to  the  extent  a  Party  has  a  good  faith  belief  that  any
information  required  to  be  disclosed  by  such  Party  to  the  other  Party  under  this  ARTICLE  8  is  protected  by  attorney-client
privilege or any other applicable legal privilege or immunity, such Party shall not be required to disclose such information and
the Parties shall in good faith cooperate to agree upon a procedure (which may include entering into a specific common interest
agreement, disclosing such information on a “for counsel eyes only” basis or similar procedure) under which such information
may be disclosed without waiving or breaching such privilege or immunity.

including  privilege  under 

the  common 

ARTICLE 9
PHARMACOVIGILANCE AND SAFETY

- 57 –

 
9.1

Pharmacovigilance

. On an Accepted Target-by-Accepted Target basis, no later than [***] for a Discovery Construct or Licensed Product, the Parties
shall enter into an agreement to initiate a process for the exchange of safety data (including post-marketing spontaneous reports
received by each Party and its Affiliates) in a mutually agreed format in order to monitor the safety of the Discovery Constructs
or Licensed Products and to meet reporting requirements with any applicable Regulatory Authority.

9.2

Global Safety Database

. On an Accepted Target-by-Accepted Target basis, no later than [***] for a Discovery Construct or Licensed Product, AbbVie
shall  set  up,  hold,  and  maintain  (at  AbbVie’s  sole  cost  and  expense)  the  global  safety  database  for  Discovery  Constructs  or
Licensed  Products.    Harpoon  shall  provide  AbbVie  with  all  information  necessary  or  desirable  for  AbbVie  to  comply  with  its
pharmacovigilance responsibilities in the Territory, including, as applicable, any adverse drug experiences, from pre-clinical or
clinical laboratory, animal toxicology and pharmacology studies, Clinical Studies, and commercial experiences with a Discovery
Construct or Licensed Product, in each case in any form agreed upon between AbbVie and Harpoon at the time of the request.  

ARTICLE 10
CONFIDENTIALITY AND NON-DISCLOSURE

10.1

Product Information

. Harpoon recognizes that by reason of AbbVie’s status as an exclusive licensee pursuant to the grants under Section 6.1, AbbVie
has  an  interest  in  Harpoon  maintaining  the  confidentiality  of  certain  information  of  Harpoon.    Accordingly,  on  an  Accepted
Target-by-Accepted Target basis, from the applicable Target Acceptance Date and for the remainder of the Term, Harpoon shall,
and shall cause its Affiliates and its and their respective officers, directors, employees, and agents to, keep confidential, and not
publish  or  otherwise  disclose,  and  not  use  directly  or  indirectly  for  any  purpose  other  than  to  fulfill  Harpoon’s  obligations
hereunder  any  Information  owned  or  otherwise  Controlled  by  Harpoon  or  any  of  its  Affiliates  specifically  relating  to  any
Discovery Construct or Licensed Product, or the Exploitation of any of the foregoing (the “Product Information”); except to the
extent  (a)  the  Product  Information  is  in  the  public  domain  through  no  fault  of  Harpoon,  its  Affiliates  or  any  of  its  or  their
respective  officers,  directors,  employees,  or  agents;  (b)  such  disclosure  or  use  is  expressly  permitted  under  Section  10.3,  or
(c) such disclosure or use is otherwise expressly permitted by the terms of this Agreement.  For purposes of Section 10.3, AbbVie
shall be deemed to be the disclosing Party with respect to Product Information under Section 10.3 and Harpoon shall be deemed
to  be  the  receiving  Party  with  respect  thereto.    For  further  clarification,  (i)  without  limiting  this  Section  10.1,  to  the  extent
Product Information is disclosed by Harpoon to AbbVie pursuant to this Agreement, such information shall, subject to the other
terms  and  conditions  of  this  ARTICLE  10,  also  constitute  Confidential  Information  of  Harpoon  with  respect  to  the  use  and
disclosure of such Information by AbbVie, but (ii) the disclosure by Harpoon to AbbVie of Product Information shall not cause
such  information  to  cease  to  be  subject  to  the  provisions  of  this  Section  10.1  with  respect  to  the  use  and  disclosure  of  such
Confidential Information by Harpoon. In the event this Agreement is terminated in its entirety or with respect to the Terminated
Territory or Terminated Target, this Section 10.1 shall have no continuing force or effect with respect to the use or disclosure of
such information solely in connection with the Exploitation of the Discovery Construct or Licensed Product for the benefit of the
Terminated Territory or Terminated Target, 

- 58 –

 
as  applicable,  but  the  Product  Information,  to  the  extent  disclosed  by  AbbVie  to  Harpoon  hereunder,  shall  continue  to  be
Confidential Information of AbbVie, subject to the terms of Sections 10.2, 10.3, and 10.6 for purposes of the surviving provisions
of this Agreement.

10.2

Confidentiality Obligations

.  At all times during the Term and for a period [***] following termination or expiration hereof in its entirety, each Party shall,
and shall cause its officers, directors, employees and agents to, keep confidential and not publish or otherwise disclose to a Third
Party and not use, directly or indirectly, for any purpose, any Confidential Information furnished or otherwise made known to it,
directly or indirectly, by the other Party, except to the extent such disclosure or use is expressly permitted by the terms of this
Agreement  or  is  reasonably  necessary  or  useful  for  the  performance  of,  or  the  exercise  of  such  Party’s  rights  under,  this
Agreement.    Notwithstanding  the  foregoing,  to  the  extent  the  receiving  Party  can  demonstrate  by  documentation  or  other
competent proof, the confidentiality and non-use obligations under this Section 10.2 with respect to any Confidential Information
shall not include any information that:

has  been  published  by  a  Third  Party  or  otherwise  is  or  hereafter  becomes  part  of  the  public
domain by public use, publication, general knowledge or the like through no wrongful act, fault or negligence on the part of the
receiving Party;

10.2.1

has been in the receiving Party’s possession prior to disclosure by the disclosing Party without
any  obligation  of  confidentiality  with  respect  to  such  information;  provided  that  the  foregoing  exception  shall  not  apply  with
respect to Regulatory Documentation (excluding clinical protocols) or Joint Program Know-How;

10.2.2

without breach of any agreement between such Third Party and the disclosing Party;

10.2.3

is  subsequently  received  by  the  receiving  Party  from  a  Third  Party  without  restriction  and

disclosure;

10.2.4

is  generally  made  available  to  Third  Parties  by  the  disclosing  Party  without  restriction  on

has been independently developed by or for the receiving Party without reference to, or use or
disclosure of, the disclosing Party’s Confidential Information; provided that the foregoing exception shall not apply with respect
to Regulatory Documentation (excluding clinical protocols) or Joint Program Know-How; or

10.2.5

10.2.6

in the case of [***], has been [***] concerning such [***].  

Specific aspects or details of Confidential Information shall not be deemed to be within the public domain or in the possession of
the receiving Party merely because the Confidential Information is embraced by more general information in the public domain
or in the possession of the receiving 

- 59 –

 
Party.  Further, any combination of Confidential Information shall not be considered in the public domain or in the possession of
the  receiving  Party  merely  because  individual  elements  of  such  Confidential  Information  are  in  the  public  domain  or  in  the
possession of the receiving Party unless the combination and its principles are in the public domain or in the possession of the
receiving Party.

10.3

Permitted Disclosures

.  Each Party may disclose Confidential Information to the extent that such disclosure is:

10.3.1

in  the  reasonable  opinion  of  the  receiving  Party’s  legal  counsel,  required  to  be  disclosed
pursuant to law, regulation or a valid order of a court of competent jurisdiction or other supra-national, federal, national, regional,
state, provincial or local governmental body of competent jurisdiction (including by reason of filing with securities regulators,
but  subject  to  Section 10.5);  provided,  that  the  receiving  Party  shall  first  have  given  prompt  written  notice  (and  to  the  extent
possible, at least [***] notice) to the disclosing Party and given the disclosing Party a reasonable opportunity to take whatever
action  it  deems  necessary  to  protect  its  Confidential  Information.    In  the  event  that  no  protective  order  or  other  remedy  is
obtained, or the disclosing Party waives compliance with the terms of this Agreement, the receiving Party shall furnish only that
portion of Confidential Information which the receiving Party is advised by counsel is legally required to be disclosed;

10.3.2

made  by  or  on  behalf  of  the  receiving  Party  to  the  Regulatory  Authorities  as  required  in
connection with any filing, application or request for Regulatory Approval of a Licensed Product in accordance with the terms of
this  Agreement;  provided,  that  reasonable  measures  shall  be  taken  to  assure  confidential  treatment  of  such  Confidential
Information to the extent practicable and consistent with Applicable Law;

10.3.3

made  by  or  on  behalf  of  the  receiving  Party  to  a  patent  authority  as  may  be  reasonably
necessary or useful for purposes of obtaining, defending or enforcing a Patent in accordance with the terms of this Agreement;
provided, that reasonable measures shall be taken to assure confidential treatment of such Confidential Information, to the extent
such protection is available;

10.3.4

made  to  its  or  its  Affiliates’  financial  and  legal  advisors  who  have  a  need  to  know  such
disclosing  Party’s  Confidential  Information  and  are  either  under  professional  codes  of  conduct  giving  rise  to  expectations  of
confidentiality  and  non-use  or  under  written  agreements  of  confidentiality  and  non-use,  in  each  case,  at  least  as  restrictive  as
those set forth in this Agreement; provided that the receiving Party shall remain responsible for any failure by such financial and
legal advisors, to treat such Confidential Information as required under this Article;

10.3.5

made by the receiving Party or its Affiliates to potential or actual investors or acquirers as may
be necessary in connection with their evaluation of such potential or actual investment or acquisition; provided, that such Persons
shall be subject to obligations of confidentiality and non-use with respect to such Confidential Information substantially similar
to the obligations of confidentiality and non-use of the receiving Party pursuant to this ARTICLE 10;

- 60 –

 
10.3.6

made by AbbVie or its Affiliates or Sublicensees to its or their advisors, consultants, clinicians,
vendors,  service  providers,  contractors,  existing  or  prospective  collaboration  partners,  licensees,  sublicensees,  or  other  Third
Parties as may be necessary or useful in connection with the Exploitation of the Discovery Construct, the Licensed Products, or
otherwise  in  connection  with  the  performance  of  its  obligations  or  exercise  of  its  rights  as  contemplated  by  this  Agreement;
provided,  that  such  Persons  shall  be  subject  to  obligations  of  confidentiality  and  non-use  with  respect  to  such  Confidential
Information substantially similar to the obligations of confidentiality and non-use of AbbVie pursuant to this ARTICLE 10; or

10.3.7

made by Harpoon or its Affiliates after receiving advanced approval from AbbVie, to its or their
advisors, consultants, clinicians, vendors, service providers, contractors, or other Third Parties as may be necessary or useful in
connection with the performance of their obligations or exercise of their rights as contemplated by this Agreement; provided, that
such  Persons  shall  be  subject  to  obligations  of  confidentiality  and  non-use  with  respect  to  such  Confidential  Information  of
AbbVie  substantially  similar  to  the  obligations  of  confidentiality  and  non-use  of  Harpoon  pursuant  to  this  ARTICLE  10;
provided, further, that the advanced approval requirement set forth in this Section 10.3.7 shall not apply to Third Party Providers
approved by AbbVie pursuant to Section 4.6.

10.4

Use of Name

. Except as expressly provided herein, neither Party shall mention or otherwise use the name, logo, or Trademark of the other
Party  or  any  of  its  Affiliates  (or  any  abbreviation  or  adaptation  thereof)  in  any  publication,  press  release,  marketing  and
promotional  material,  or  other  form  of  publicity  without  the  prior  written  approval  of  such  other  Party  in  each  instance.   The
restrictions imposed by this Section 10.4 shall not prohibit either Party from making any disclosure identifying the other Party
that, in the opinion of the disclosing Party’s counsel, is required by Applicable Law; provided, that such Party shall submit the
proposed disclosure identifying the other Party in writing to the other Party as far in advance as reasonably practicable (and in no
event less than [***] prior to the anticipated date of disclosure) so as to provide a reasonable opportunity to comment thereon.

10.5

Public Announcements

.    Neither  Party  shall  issue  any  public  announcement,  press  release,  or  other  public  disclosure  regarding  this  Agreement  or  its
subject matter without the other Party’s prior written consent, except (i) for a mutually agreed press release to be issued promptly
following the Effective Date, or (ii) for any such disclosure that is, in the opinion of the disclosing Party’s counsel, required by
Applicable  Law  or  the  rules  of  a  stock  exchange  on  which  the  securities  of  the  disclosing  Party  are  listed  (or  to  which  an
application for listing has been submitted).  In the event a Party is, in the opinion of its counsel, required by Applicable Law or
the rules of a stock exchange on which its securities are listed (or to which an application for listing has been submitted) to make
such  a  public  disclosure,  such  Party  shall  submit  the  proposed  disclosure  in  writing  to  the  other  Party  as  far  in  advance  as
reasonably practicable (and in no event less than [***] prior to the anticipated date of disclosure) so as to provide a reasonable
opportunity to comment thereon.  Notwithstanding the foregoing, AbbVie, its Sublicensees and its and their respective Affiliates
shall have the right to publicly disclose research, development and commercial information (including with respect to regulatory
matters)  regarding  the  Discovery  Construct  and  Licensed  Products,  provided  that  any  such  disclosure  does  not  contain  any
Confidential Information of Harpoon.  

- 61 –

 
10.6

Publications

.  The Parties acknowledge that scientific publications must be strictly monitored to prevent any adverse effect from premature
publication of results of the activities contemplated hereunder.  Accordingly, [***], except as required by Applicable Law.

10.7

Return of Confidential Information

.  Upon the effective date of the termination of this Agreement for any reason, either Party may request in writing, and the other
Party shall either, with respect to Confidential Information (in the event of termination of this Agreement with respect to one (1)
or  more  Terminated  Territories  or  Terminated  Targets  but  not  in  its  entirety,  solely  to  the  extent  relating  specifically  and
exclusively to such Terminated Territories or Terminated Targets, as applicable) to which such other Party does not retain rights
under the surviving provisions of this Agreement: (a) as soon as reasonably practicable, destroy all copies of such Confidential
Information in the possession of the other Party and confirm such destruction in writing to the requesting Party; or (b) as soon as
reasonably practicable, deliver to the requesting Party, at such other Party’s expense, all copies of such Confidential Information
in  the  possession  of  such  other  Party;  provided,  that  such  other  Party  shall  be  permitted  to  retain  one  (1)  copy  of  such
Confidential  Information  for  the  sole  purpose  of  performing  any  continuing  obligations  hereunder,  as  required  by  Applicable
Law, or for archival purposes.  Notwithstanding the foregoing, such other Party also shall be permitted to retain such additional
copies of or any computer records or files containing such Confidential Information that have been created solely by such Party’s
automatic  archiving  and  back-up  procedures,  to  the  extent  created  and  retained  in  a  manner  consistent  with  such  other  Party’s
standard archiving and back-up procedures, but not for any other use or purpose.  

10.8

Survival

.  All Confidential Information shall continue to be subject to the terms of this Agreement for the period set forth in Section 10.2.

ARTICLE 11
REPRESENTATIONS AND WARRANTIES

11.1

Mutual Representations and Warranties

.  Harpoon and AbbVie each represents and warrants to the other, as of the Amended Effective Date, as follows:  

Organization.  It  is  a  corporation  duly  incorporated,  validly  existing,  and  in  good  standing
under the laws of the jurisdiction of its incorporation, and has all requisite corporate power and authority, to execute, deliver, and
perform this Agreement.

11.1.1

11.1.2

Authorization.  The execution and delivery of this Agreement and the performance by it of the
transactions contemplated hereby have been duly authorized by all necessary corporate action, and do not violate (a) such Party’s
charter  documents,  bylaws,  or  other  organizational  documents,  (b)  in  any  material  respect,  any  agreement,  instrument,  or
contractual obligation to which such Party is bound, (c) any requirement of any Applicable Law, or (d) any order, writ, judgment,
injunction, decree, determination, or award of any court or governmental agency presently in effect applicable to such Party.

- 62 –

 
11.1.3

Binding Agreement.    This  Agreement  is  a  legal,  valid,  and  binding  obligation  of  such  Party
enforceable against it in accordance with its terms and conditions, subject to the effects of bankruptcy, insolvency, or other laws
of  general  application  affecting  the  enforcement  of  creditor  rights,  judicial  principles  affecting  the  availability  of  specific
performance, and general principles of equity (whether enforceability is considered a proceeding at law or equity).

No Inconsistent Obligation.    It  is  not  under  any  obligation,  contractual  or  otherwise,  to  any
Person that conflicts with or is inconsistent in any material respect with the terms of this Agreement, or that would impede the
diligent and complete fulfillment of its obligations hereunder.

11.1.4

11.1.5

No  Misstatements  or  Omissions.    The  representations  and  warranties  of  such  Party  in  this
Agreement,  and  the  Information,  documents  and  materials  furnished  to  the  other  Party  in  response  to  such  Party’s  written
requests for due diligence information prior to the Amended Effective Date, as applicable, do not, taken as a whole, (a) contain
any untrue statement of a material fact, or (b) omit to state any material fact necessary to make the statements or facts contained
therein, in light of the circumstances under which they were made, not misleading.

11.2

Additional Representations and Warranties of Harpoon

.  Harpoon further represents and warrants to AbbVie, as of the Amended Effective Date, as follows:

11.2.1

All  Harpoon  Background  Patents  existing  as  of  the  Amended  Effective  Date  are  listed  on
Schedule 11.2.1 (the “Existing Patents”).  To Harpoon’s Knowledge, all Existing Patents existing as of the Amended Effective
Date  are  subsisting  and,  to  Harpoon’s  Knowledge,  are  not  invalid  or  unenforceable,  in  whole  or  in  part,  are  being  diligently
prosecuted  in  the  applicable  patent  offices  in  the  Territory  in  accordance  with  Applicable  Law,  and  have  been  filed  and
maintained properly and correctly and all applicable fees have been paid on or before the due date for payment.

11.2.2

There  are  no  judgments,  or  settlements  against,  or  amounts  with  respect  thereto,  owed  by
Harpoon or any of its Affiliates relating to the Existing Patents, or the Harpoon Background Know-How.  No claim or litigation
has  been  brought  or  threatened  in  writing  or  any  other  form  by  any  Person  alleging,  and  Harpoon  has  no  Knowledge  of  any
claim,  whether  or  not  asserted,  that  (a)  the  Existing  Patents  are  invalid  or  unenforceable,  or  (b)  the  Development  or
Commercialization of the Discovery Constructs or Licensed Products as contemplated herein [***], does or will violate, infringe,
misappropriate or otherwise conflict or interfere with, any Patent or other intellectual property or proprietary right of any Third
Party.    To  Harpoon’s  Knowledge,  no  Person  is  infringing  or  threatening  to  infringe  or  misappropriating  or  threatening  to
misappropriate the Existing Patents or the Harpoon Background Know-How.

Patents listed on Schedule 11.2.1, Part A (the “Owned Patents”) and the 

11.2.3

Harpoon is (a) the sole and exclusive owner of the entire right, title and interest in the Existing

- 63 –

 
Harpoon Background Know-How and (b) the sole and exclusive licensee of the Existing Patents listed on Schedule 11.2.1, Part B
(the  “In-Licensed  Patents”)  subject  to  valid  and  enforceable  in-license  agreements  (each,  a  “Harpoon  In-License
Agreement”), in each case ((a) and (b)) free of any encumbrance, lien, or claim of ownership by any Third Party.  Harpoon is
entitled  to  grant  the  licenses  specified  herein.    The  Owned  Patents  and  In-Licensed  Patents  represent  all  of  the  Existing
Patents.    The  Existing  Patents  represent  all  Patents  within  Harpoon’s  or  its  Affiliates’  ownership  or  Control  relating  to  the
Harpoon  Platform,  or  the  Exploitation  thereof,  as  of  the  Amended  Effective  Date.    To  Harpoon’s  Knowledge,  there  is  no
Information  owned  or  Controlled  by  Harpoon  or  any  of  its  Affiliates  as  of  the  Amended  Effective  Date  that  relates  to  the
Harpoon Platform that is not within the Harpoon Background Know-How.

11.2.4

To Harpoon’s Knowledge, Harpoon has the right to use all Information and Patents necessary to
Develop, Manufacture and Commercialize the Discovery Constructs and the Licensed Products as contemplated herein [***] and
such are not subject to any license or agreement to which Harpoon or any of its Affiliates is a party other than a Harpoon In-
License Agreement.  

Knowledge, any Third Party is in breach of any Harpoon In-License Agreement.

11.2.5

As  of  the  Amended  Effective  Date,  none  of  Harpoon  or  its  Affiliates  and,  to  Harpoon’s

11.2.6

True, complete, and correct copies of: (a) the file wrapper and other documents and materials
relating to the prosecution, defense, maintenance, validity, and enforceability of the Existing Patents; (b) all existing Harpoon In-
License Agreements; and (c) all material adverse information with respect to the safety and efficacy of the Discovery Constructs
known  to  Harpoon,  in  each  case  ((a)  through  (c))  have  been  provided  or  made  available  to  AbbVie  prior  to  the  Amended
Effective Date, as applicable.

Harpoon  and  its  Affiliates  have  generated,  prepared,  maintained,  and  retained  all  Regulatory
Documentation  that  is  required  to  be  maintained  or  retained  pursuant  to  and  in  accordance  with  Applicable  Law,  and  all  such
information is true, complete and correct and what it purports to be.

11.2.7

11.2.8

Each  Person  who  has  or  has  had  any  rights  in  or  to  any  Owned  Patents  or  any  Harpoon
Background Know-How, has assigned and has executed an agreement assigning its entire right, title, and interest in and to such
Owned  Patents  and  Harpoon  Background  Know-How  to  Harpoon.    To  Harpoon’s  Knowledge,  no  current  officer,  employee,
agent, or consultant of Harpoon or any of its Affiliates is in violation of any term of any assignment or other agreement regarding
the protection of Patents or other intellectual property or proprietary information of Harpoon related to the Harpoon Background
Patents.

All rights in all inventions and discoveries, made, developed, or conceived by any employee or
independent contractor of Harpoon or any of its Affiliates during the course of their employment (or other retention) by Harpoon
or such Affiliate, and included in 

11.2.9

- 64 –

 
Harpoon  Background  Know-How  or  that  are  the  subject  of  one  (1)  or  more  Existing  Patents  have  been  or  will  be  assigned  in
writing to Harpoon or such Affiliate.

11.2.10

Harpoon  has  obtained  the  right  (including  under  any  Patents  and  other  intellectual  property
rights) to use all Information and all other materials (including any formulations and manufacturing processes and procedures)
developed or delivered by any Third Party under any agreements between Harpoon and any such Third Party that is reasonably
necessary or useful for the Development or Commercialization of Discovery Constructs, and Harpoon has the rights under each
such agreement to transfer such Information or other materials to AbbVie and its designees and to grant AbbVie the right to use
such  Information  or  other  materials  in  the  Development  or  Commercialization  of  the  Discovery  Constructs  or  the  Licensed
Products as set forth in this Agreement.

11.2.11

Harpoon  has  made  (and  will  make)  available  to  AbbVie,  as  set  forth  in  Section  4.4(a),  all
Regulatory  Documentation  and  Harpoon  Background  Know-How  and  all  such  Regulatory  Documentation  and  Harpoon
Background Know-How are (and, if made available after the Amended Effective Date, will be), to Harpoon’s Knowledge, true,
complete,  and  correct.  Neither  Harpoon  nor  any  of  its  Affiliates  has  any  Knowledge  of  [***]  that  has  not  been  disclosed  to
AbbVie as of the Amended Effective Date.  [***] of a Licensed Product.

11.2.12

Neither Harpoon nor any of its Affiliates, nor any of its or their respective officers, employees,
or agents has made an untrue statement of material fact or fraudulent statement to the FDA or any other Regulatory Authority
with respect to the Development of the Discovery Constructs or the Licensed Products, failed to disclose a material fact required
to be disclosed to the FDA or any other Regulatory Authority with respect to the Development of the Discovery Constructs or the
Licensed Products, or committed an act, made a statement, or failed to make a statement with respect to the Development of the
Discovery Constructs or the Licensed Products that could reasonably be expected to provide a basis for the FDA to invoke its
policy respecting “Fraud, Untrue Statements of Material Facts, Bribery, and Illegal Gratuities”, set forth in 56 Fed. Reg. 46191
(September 10, 1991) and any amendments thereto or any analogous laws or policies in the Territory.

There  are  no  amounts  that  will  be  required  to  be  paid  to  a  Third  Party  as  a  result  of  the
Development or Commercialization of Discovery Construct or the Licensed Products that arise out of any agreement to which
Harpoon or any of its Affiliates is a party, [***].

11.2.13

hereunder, have ever been, are currently, or are the subject of a 

11.2.14

Neither  Harpoon  nor  any  of  its  employees  nor,  to  Harpoon’s  Knowledge,  agents  performing

- 65 –

 
proceeding that could lead to it or such employees or agents becoming, as applicable, a Debarred Entity or Debarred Individual,
an  Excluded  Entity  or  Excluded  Individual  or  a  Convicted  Entity  or  Convicted  Individual  or  added  to  the  FDA’s
Disqualified/Restricted List.  If, during the Term, Harpoon, or any of its employees or agents performing hereunder, become or
are the subject of a proceeding that could lead to a Person becoming, as applicable, a Debarred Entity or Debarred Individual, an
Excluded  Entity  or  Excluded  Individual  or  a  Convicted  Entity  or  Convicted  Individual  or  added  to  the  FDA’s
Disqualified/Restricted List, Harpoon shall immediately notify AbbVie, and AbbVie shall have the right, exercisable upon written
notice given by AbbVie to terminate this Agreement.  This provision shall survive termination or expiration of this Agreement.
For purposes of this Agreement, the following definitions shall apply:

A  “Debarred  Individual”  is  an  individual  who  has  been  debarred  by  the  FDA
pursuant to 21 U.S.C. §335a (a) or (b) from providing services in any capacity to a person that has an approved or pending drug
or biological product application.

(a)

A  “Debarred  Entity”  is  a  corporation,  partnership  or  association  that  has  been
debarred by the FDA pursuant to 21 U.S.C. §335a (a) or (b) from submitting or assisting in the submission of any Drug Approval
Application, or a subsidiary or affiliate of a Debarred Entity.

(b)

(c)

An “Excluded Individual” or “Excluded Entity”  is  (i)  an  individual  or  entity,  as
applicable, who has been excluded, debarred, suspended or is otherwise ineligible to participate in federal health care programs
such as Medicare or Medicaid by the Office of the Inspector General (OIG/HHS) of the U.S. Department of Health and Human
Services, or (ii) is an individual or entity, as applicable, who has been excluded, debarred, suspended or is otherwise ineligible to
participate  in  federal  procurement  and  non-procurement  programs,  including  those  produced  by  the  U.S.  General  Services
Administration (GSA).

A  “Convicted  Individual”  or  “Convicted  Entity”  is  an  individual  or  entity,  as
applicable, who has been convicted of a criminal offense that falls within the ambit of 21 U.S.C. §335a (a) or 42 U.S.C. §1320a -
7(a), but has not yet been excluded, debarred, suspended or otherwise declared ineligible.  

(d)

“FDA’s Disqualified/Restricted List” is the list of clinical investigators restricted
from receiving investigational drugs, biologics, or devices if the FDA has determined that the investigators have repeatedly or
deliberately failed to comply with regulatory requirements for studies or have submitted false Information to the study sponsor or
the FDA.

(e)

11.2.15

The inventions claimed or covered by the Existing Patents (a) were not conceived, discovered,
developed, or otherwise made in connection with any research activities funded, in whole or in part, by the federal government of
the  United  States  or  any  agency  thereof,  and  (b)  are  not  a  “subject  invention”  as  that  term  is  described  in  35  U.S.C.  Section
201(f).

11.3

Additional Representations and Warranties of AbbVie

.  AbbVie further represents and warrants to Harpoon, as of the Target Acceptance Date with respect to an Accepted Target, as
follows: 

- 66 –

 
To AbbVie’s Knowledge, AbbVie has the right to use all Information and Patents necessary to
Develop, Manufacture and Commercialize the Discovery T-Cell Receptors or Discovery Antibodies, as applicable, that Bind to
such Accepted Target and AbbVie is entitled to grant Harpoon the licenses specified in Section 6.2.  

11.3.1

11.3.2

All rights in all inventions and discoveries, made, developed, or conceived by any employee or
independent contractor of AbbVie or any of its Affiliates during the course of their employment (or other retention) by AbbVie or
such  Affiliate,  and  included  in  AbbVie  Background  Know-How  or  that  are  the  subject  of  [***]  or  more  AbbVie  Background
Patents existing as of (a) the Effective Date that claim or cover Discovery T-Cell Receptors that Bind to such Accepted Target or
(b) the Amended Effective Date that claim or cover Discovery Antibodies that Bind to such Accepted Target, in each case (a) and
(b) have been or will be assigned in writing to AbbVie or such Affiliate.

11.3.3

AbbVie  has  obtained  the  right  (including  under  any  Patents  and  other  intellectual  property
rights) to use all Information and all other materials developed or delivered by any Third Party under any agreements between
AbbVie and any such Third Party that is necessary for the Development or Commercialization of Discovery T-Cell Receptors or
Discovery Antibodies, as applicable, that Bind to such Accepted Target, and AbbVie has the rights under each such agreement to
transfer such Information or other materials to Harpoon and its designees and to grant Harpoon the right to use such Information
or other materials in the Development of the Discovery Constructs or the Licensed Products as set forth in this Agreement.

11.3.4

Neither  AbbVie  nor  any  of  its  employees  nor,  to  AbbVie’s  Knowledge,  agents  performing
hereunder,  have  ever  been,  are  currently,  or  are  the  subject  of  a  proceeding  that  could  lead  to  it  or  such  employees  or  agents
becoming, as applicable, a Debarred Entity or Debarred Individual, an Excluded Entity or Excluded Individual or a Convicted
Entity  or  Convicted  Individual  or  added  to  the  FDA’s  Disqualified/Restricted  List.    If,  during  the  Term,  AbbVie,  or  any  of  its
employees or agents performing hereunder, become or are the subject of a proceeding that could lead to a Person becoming, as
applicable,  a  Debarred  Entity  or  Debarred  Individual,  an  Excluded  Entity  or  Excluded  Individual  or  a  Convicted  Entity  or
Convicted  Individual  or  added  to  the  FDA’s  Disqualified/Restricted  List,  AbbVie  shall  immediately  notify  Harpoon.  This
provision shall survive termination or expiration of this Agreement.

11.4

Covenants of Harpoon

.  Harpoon covenants to AbbVie as follows:

11.4.1

During the Term, neither Harpoon nor any of its Affiliates shall encumber or diminish the rights
granted  to  AbbVie  hereunder  with  respect  to  the  Harpoon  Background  Patents  or  Harpoon  Program  Patents,  including  by  not
(a) committing any acts or permitting the occurrence of any omissions that would cause the breach or termination of any Harpoon
In-License  Agreement,  or  (b)  amending  or  otherwise  modifying  or  permitting  to  be  amended  or  modified,  any  Harpoon  In-
License  Agreement,  where  such  amendment  or  modification  would  adversely  affect  the  rights  granted  to  AbbVie
hereunder.  Harpoon shall promptly provide AbbVie with notice of any alleged, threatened, or actual breach of any Harpoon In-
License Agreement.

- 67 –

 
experience to conduct and to oversee the Discovery Research Activities.

11.4.2

Harpoon  and  its  Affiliates  will  employ  Persons  with  appropriate  education,  knowledge  and

11.4.3

Harpoon  shall  have  obtained  from  each  of  its  Affiliates,  sublicensees,  employees  and  agents
who are participating in the Exploitation of the Discovery Constructs or Licensed Products or who otherwise have access to any
AbbVie Information or other Confidential Information of AbbVie, rights to any and all Information that is reasonably necessary
or  useful  for  the  Development  or  Commercialization  of  Discovery  Constructs  or  Licensed  Products,  in  each  case  prior  to  the
performance of or participation in such activities, such that AbbVie shall, by virtue of this Agreement, receive from Harpoon,
without payments beyond those required by ARTICLE 7, the licenses and other rights granted to AbbVie hereunder.

11.5

Covenants of AbbVie

.  AbbVie covenants to Harpoon as follows:

11.5.1

AbbVie shall have obtained from each of its Affiliates, Sublicensees, employees and agents who
are  participating  in  the  Exploitation  of  the  Discovery  Constructs  or  Licensed  Products  or  who  otherwise  have  access  to  any
Harpoon Information or other Confidential Information of Harpoon, rights to any and all Information that is reasonably necessary
or  useful  for  the  Development  or  Commercialization  of  Discovery  Constructs  or  Licensed  Products,  in  each  case  prior  to  the
performance of or participation in such activities, such that Harpoon shall, by virtue of this Agreement, receive from AbbVie,
without additional consideration, the licenses specified in Section 6.2.

11.6

DISCLAIMER OF WARRANTIES

. 
  EXCEPT  FOR  THE  EXPRESS  WARRANTIES  SET  FORTH  HEREIN,  NEITHER  PARTY  MAKES  ANY
REPRESENTATIONS OR GRANTS ANY WARRANTIES, EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION
OF  LAW,  BY  STATUTE  OR  OTHERWISE,  AND  EACH  PARTY  SPECIFICALLY  DISCLAIMS  ANY  OTHER
WARRANTIES,  WHETHER  WRITTEN  OR  ORAL,  OR  EXPRESS  OR  IMPLIED,  INCLUDING  ANY  WARRANTY  OF
QUALITY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR USE OR PURPOSE OR ANY WARRANTY AS TO
THE VALIDITY OF ANY PATENTS OR THE NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHTS OF
THIRD PARTIES.

12.1

Indemnification of Harpoon

ARTICLE 12
INDEMNITY

.    AbbVie  shall  indemnify  Harpoon,  its  Affiliates  and  its  and  their  respective  directors,  officers,  employees,  and  agents  (the
“Harpoon Indemnitees”) and defend and save each of them harmless, from and against any and all losses, damages, liabilities,
penalties, costs, and expenses (including reasonable attorneys’ fees and expenses) (collectively, “Losses”) in connection with any
and all suits, investigations, claims, or demands of Third Parties (collectively, “Third Party Claims”) incurred by or rendered
against the Harpoon Indemnitees arising from or occurring as a result of: [***].

- 68 –

 
12.2

Indemnification of AbbVie

.    Harpoon  shall  indemnify  AbbVie,  its  Affiliates  and  their  respective  directors,  officers,  employees,  and  agents  (the  “AbbVie
Indemnitees”), and defend and save each of them harmless, from and against any and all Losses in connection with any and all
Third Party Claims incurred by or rendered against the AbbVie Indemnitees arising from or occurring as a result of: [***].

12.3

Notice of Claim

.  All indemnification claims in respect of a Party, its Affiliates, or their respective directors, officers, employees and agents shall
be made solely by such Party to this Agreement (the “Indemnified Party”).  The Indemnified Party shall give the indemnifying
Party  prompt  written  notice  (an  “Indemnification  Claim  Notice”)  of  any  Losses  or  discovery  of  fact  upon  which  such
Indemnified Party intends to base a request for indemnification under this ARTICLE 12, but in no event shall the indemnifying
Party  be  liable  for  any  Losses  that  result  from  any  delay  in  providing  such  notice.    Each  Indemnification  Claim  Notice  must
contain a description of the claim and the nature and amount of such Loss (to the extent that the nature and amount of such Loss
is known at such time).  The Indemnified Party shall furnish promptly to the indemnifying Party copies of all papers and official
documents received in respect of any Losses and Third Party Claims.  

12.4

Control of Defense.

12.4.1

In  General.    Subject  to  the  provisions  of  Sections  8.4,  8.5  and  8.7,  at  its  option,  the
indemnifying Party may assume the defense of any Third Party Claim by giving written notice to the Indemnified Party within
[***] after the indemnifying Party’s receipt of an Indemnification Claim Notice.  The assumption of the defense of a Third Party
Claim by the indemnifying Party shall not be construed as an acknowledgment that the indemnifying Party is liable to indemnify
the  Indemnified  Party  in  respect  of  the  Third  Party  Claim,  nor  shall  it  constitute  a  waiver  by  the  indemnifying  Party  of  any
defenses it may assert against the Indemnified Party’s claim for indemnification.  Upon assuming the defense of a Third Party
Claim, the indemnifying Party may appoint as lead counsel in the defense of the Third Party Claim any legal counsel selected by
the  indemnifying  Party  which  shall  be  reasonably  acceptable  to  the  Indemnified  Party.    In  the  event  the  indemnifying  Party
assumes the defense of a Third Party Claim, the Indemnified Party shall promptly deliver to the indemnifying Party all original
notices  and  documents  (including  court  papers)  received  by  the  Indemnified  Party  in  connection  with  the  Third  Party
Claim.    Should  the  indemnifying  Party  assume  the  defense  of  a  Third  Party  Claim,  except  as  provided  in  Section  12.4.2,  the
indemnifying Party shall not be liable to the Indemnified Party for any legal expenses subsequently incurred by such Indemnified
Party in connection with the analysis, defense or settlement of the Third Party Claim unless specifically requested in writing by
the indemnifying Party.  In the event that it is ultimately determined that the indemnifying Party 

- 69 –

 
is  not  obligated  to  indemnify,  defend  or  hold  harmless  the  Indemnified  Party  from  and  against  the  Third  Party  Claim,  the
Indemnified Party shall reimburse the indemnifying Party for any Losses incurred by the indemnifying Party in its defense of the
Third Party Claim.

12.4.2

Right to Participate in Defense.  Without limiting Section 12.4.1, any Indemnified Party shall
be entitled to participate in, but not control, the defense of such Third Party Claim and to employ counsel of its choice for such
purpose; provided, that such employment shall be at the Indemnified Party’s own expense unless (a) the employment thereof, and
the assumption by the indemnifying Party of such expense, has been specifically authorized by the indemnifying Party in writing,
(b) the indemnifying Party has failed to assume the defense and employ counsel in accordance with Section 12.4.1 (in which case
the  Indemnified  Party  shall  control  the  defense),  or  (c)  the  interests  of  the  Indemnified  Party  and  the  indemnifying  Party  with
respect to such Third Party Claim are sufficiently adverse to prohibit the representation by the same counsel of both Parties under
Applicable Law, ethical rules or equitable principles.  

12.4.3

Settlement.  With respect to any  Losses  relating  solely  to  the  payment  of  money  damages in
connection with a Third Party Claim and that shall not result in the Indemnified Party’s becoming subject to injunctive or other
relief, and as to which the indemnifying Party shall have acknowledged in writing the obligation to indemnify the Indemnified
Party  hereunder,  the  indemnifying  Party  shall  have  the  sole  right  to  consent  to  the  entry  of  any  judgment,  enter  into  any
settlement  or  otherwise  dispose  of  such  Loss,  on  such  terms  as  the  indemnifying  Party,  in  its  sole  discretion,  shall  deem
appropriate.  With respect to all other Losses in connection with Third Party Claims, where the indemnifying Party has assumed
the defense of the Third Party Claim in accordance with Section 12.4.1, the indemnifying Party shall have authority to consent to
the entry of any judgment, enter into any settlement or otherwise dispose of such Loss; provided, that it obtains the prior written
consent  of  the  Indemnified  Party  (which  consent  shall  not  be  unreasonably  withheld,  conditioned  or  delayed).    If  the
indemnifying Party does not assume and conduct the defense of a Third Party Claim as provided above, the Indemnified Party
may defend against such Third Party Claim.  Regardless of whether the indemnifying Party chooses to defend or prosecute any
Third Party Claim, no Indemnified Party shall admit any liability with respect to, or settle, compromise or dispose of, any Third
Party  Claim  without  the  prior  written  consent  of  the  indemnifying  Party.    The  indemnifying  Party  shall  not  be  liable  for  any
settlement, compromise or other disposition of a Loss by an Indemnified Party that is reached without the written consent of the
indemnifying Party.

12.4.4

Cooperation.    Regardless  of  whether  the  indemnifying  Party  chooses  to  defend  or  prosecute
any Third Party Claim, the Indemnified Party shall, and shall cause each indemnitee to, cooperate in the defense or prosecution
thereof and shall furnish such records, information and testimony, provide such witnesses and attend such conferences, discovery
proceedings, hearings, trials and appeals as may be reasonably requested in connection therewith.  Such cooperation shall include
access during normal business hours afforded to the indemnifying Party to, and reasonable retention by the Indemnified Party of,
records  and  information  that  are  reasonably  relevant  to  such  Third  Party  Claim,  and  making  Indemnified  Parties  and  other
employees and agents available on a mutually convenient basis to provide additional information and explanation of any material
provided  hereunder,  and  the  indemnifying  Party  shall  reimburse  the  Indemnified  Party  for  all  its  reasonable  out-of-pocket
expenses in connection therewith.

- 70 –

 
12.4.5

Expenses.    Except  as  provided  above,  the  reasonable  and  verifiable  costs  and  expenses,
including fees and disbursements of counsel, incurred by the Indemnified Party in connection with any Third Party Claim shall be
reimbursed on a Calendar Quarter basis in arrears by the indemnifying Party, without prejudice to the indemnifying Party’s right
to contest the Indemnified Party’s right to indemnification and subject to refund in the event the indemnifying Party is ultimately
held not to be obligated to indemnify the Indemnified Party.

12.5

Special, Indirect, and Other Losses

.  EXCEPT  (A)  FOR  WILLFUL  MISCONDUCT  OR  GROSS  NEGLIGENCE,  (B)  FOR  A  PARTY’S  BREACH  OF  ITS
OBLIGATIONS  UNDER  [***],  (C)  AS  PROVIDED  UNDER  [***],  AND  (D)  TO  THE  EXTENT  ANY  SUCH  DAMAGES
ARE  REQUIRED  TO  BE  PAID  TO  A  THIRD  PARTY  AS  PART  OF  A  CLAIM  FOR  WHICH  A  PARTY  PROVIDES
INDEMNIFICATION UNDER THIS ARTICLE 12, NEITHER PARTY NOR ANY OF ITS AFFILIATES SHALL BE LIABLE
FOR  INDIRECT,  INCIDENTAL,  SPECIAL,  EXEMPLARY,  PUNITIVE  OR  CONSEQUENTIAL  DAMAGES,  INCLUDING
LOSS  OF  PROFITS  OR  BUSINESS  INTERRUPTION,  HOWEVER  CAUSED  AND  ON  ANY  THEORY  OF  LIABILITY,
WHETHER  IN  CONTRACT,  TORT,  NEGLIGENCE,  BREACH  OF  STATUTORY  DUTY  OR  OTHERWISE  IN
CONNECTION  WITH  OR  ARISING  IN  ANY  WAY  OUT  OF  THE  TERMS  OF  THIS  AGREEMENT  OR  THE
TRANSACTIONS  CONTEMPLATED  HEREBY  OR  THE  USE  OF  THE  DISCOVERY  CONSTRUCTS  OR  LICENSED
PRODUCTS, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

12.6

Insurance

.  Each Party shall obtain and carry in full force and effect the minimum insurance requirements set forth herein.  Such insurance
(a)  shall  be  primary  insurance  with  respect  to  each  Party’s  own  participation  under  this  Agreement,  (b)  shall  be  issued  by  a
recognized insurer rated by [***] (or its equivalent) or better, or an insurer pre-approved in writing by the other Party, (c) shall
list the other Party as an additional named insured thereunder, and (d) shall require [***]’ written notice to be given to the other
Party prior to any cancellation, non-renewal or material change thereof.

12.6.1

Types and Minimum Limits.  The types of insurance, and minimum limits shall be:

Compensation laws of the state or states in which the Party has employees in the United States (excluding Puerto Rico).

(a)

Worker’s  Compensation  with  statutory  limits  in  compliance  with  the  Worker’s

has employees in the United States (excluding Puerto Rico).

(b)

Employer’s Liability coverage with a minimum limit of [***]; provided, that a Party

General  Liability  Insurance  with  a  minimum  limit  of  [***]  and  [***].    General
Liability  Insurance,  which,  in  the  case  of  AbbVie  only,  shall  include,  at  a  minimum,  Professional  Liability,  Clinical  Trial
Insurance and, beginning at least [***] prior to First Commercial Sale of a Licensed Product, product liability insurance.

(c)

- 71 –

 
12.6.2

Certificates of Insurance.  Upon request by a Party, the other Party shall provide Certificates
of  Insurance  evidencing  compliance  with  this  Section  (including  evidence  of  permitted  self-insurance,  as  applicable).    The
insurance policies shall be under an occurrence form, but if only a claims-made form is available to a Party, then such Party shall
continue to maintain such insurance after the expiration or termination of this Agreement for the longer of (a) a period of [***]
following termination or expiration of this Agreement in its entirety, or (b) with respect to a particular Party, [***] by a Party.

12.6.3

Self-Insurance.  Notwithstanding  the  foregoing,  a  Party  may  self-insure,  in  whole  or  in  part,
the insurance requirements described above, provided that such Party (on a consolidated basis with its Affiliates) has [***], and,
if  such  Party  is  not  publicly  traded  on  a  recognized  securities  exchange,  upon  request  of  the  other  Party,  provides  reasonable
evidence thereof to such other Party.

ARTICLE 13
TERM AND TERMINATION

13.1

Term

.

Term.  This Agreement shall commence on the Effective Date and, unless earlier terminated in
accordance herewith, shall continue in force and effect until the date of expiration of the last Royalty Term for the last Licensed
Product (such period, the “Term”).

13.1.1

6.1 shall become non-exclusive, fully-paid, royalty-free and irrevocable.

13.1.2

Effect of Expiration of the Term.  Following the expiration of the Term, the grants in Section

13.2

Termination for Material Breach

.  

13.2.1

Material Breach.    If  either  Party  (the  “Non-Breaching Party”)  believes  that  the  other  Party
(the “Breaching Party”) has materially breached one (1) or more of its material obligations under this Agreement, then the Non-
Breaching Party may deliver notice of such material breach to the Breaching Party (a “Default Notice”).  If the Breaching Party
does not dispute that it has committed a material breach of one (1) or more of its material obligations under this Agreement, then
if the Breaching Party fails to cure such breach within ninety (90) days after receipt of the Default Notice, or if such compliance
cannot be fully achieved within such ninety (90) day period and the Breaching Party has failed to commence compliance or has
failed to use diligent efforts to achieve full compliance as soon thereafter as is reasonably possible, the Non-Breaching Party may
terminate  this  Agreement  upon  written  notice  to  the  Breaching  Party.    If  the  Breaching  Party  disputes  that  it  has  materially
breached one (1) of its material obligations under this Agreement, the dispute shall be resolved pursuant to Section 14.7.  If, as a
result of the application of such dispute resolution procedures, the Breaching Party is determined to be in material breach of one
(1) or more of its material obligations under this Agreement (an “Adverse 

- 72 –

 
Ruling”), then if the Breaching Party fails to complete the actions specified by the Adverse Ruling to cure such material breach
within [***] after such ruling, or if such compliance cannot be fully achieved within such [***] period and the Breaching Party
has  failed  to  commence  diligent  efforts  to  achieve  full  compliance  as  soon  thereafter  as  is  reasonably  possible,  then  the  Non-
Breaching Party may terminate this Agreement upon written notice to the Breaching Party.  

13.2.2

Material Breach Related to Diligence in a Major Market. Notwithstanding Section 13.2.1, if
the material breach and failure to cure contemplated by Section 13.2.1 is with respect to AbbVie’s Commercialization diligence
obligations under Section 5.2 with respect to any Major Market, Harpoon shall not have the right to terminate this Agreement in
its entirety, but shall have the right to terminate this Agreement solely with respect to such Major Market.

13.2.3

Material  Breach  Related  to  an  Accepted  Target.    Notwithstanding  Section  13.2.1,  if  the
material breach and failure to cure contemplated by Section 13.2.1 is with respect to AbbVie’s obligations under this Agreement
with respect to any particular Accepted Target, Harpoon shall not have the right to terminate this Agreement in its entirety, but
shall have the right to terminate this Agreement solely with respect to such Accepted Target.

13.2.4

Invocation  of  Material  Breach.    Notwithstanding  the  foregoing,  the  Parties  agree  that
termination pursuant to this Section 13.2 is a remedy to be invoked only if the breach is not (a) cured in accordance with Section
13.2.1  (including  the  timeframes  set  forth  therein),  (b)  remedied  through  the  payment  of  money  damages  determined  in
accordance with Section 14.7 or (c) adequately remedied through a combination of (a) and (b).

13.3

Additional Termination Rights by AbbVie

.  

13.3.1

For Cause.  AbbVie may terminate this Agreement in its entirety or on an Accepted Target-by-
Accepted Target basis effective immediately upon written notice to Harpoon in the event that (a) a Discovery Construct Failure
occurs,  or  (b) AbbVie  in  good  faith  believes  that  it  is  not  advisable  for  AbbVie  to  continue  to  Develop  or  Commercialize  the
Discovery Constructs or Licensed Products as a result of a serious safety issue regarding the use of any Licensed Product.

Termination  For  Convenience  by  AbbVie.    AbbVie  may  terminate  this  Agreement  in  its
entirety, or on a country-by-country or other jurisdiction basis, or on an Accepted Target-by-Accepted Target basis, for any or no
reason, upon thirty (30) days’ prior written notice to Harpoon.

13.3.2

13.4

Termination for Insolvency

.    In  the  event  that  either  Party  (a)  files  for  protection  under  bankruptcy  or  insolvency  laws,  (b)  makes  an  assignment  for  the
benefit of creditors, (c) appoints or suffers appointment of a receiver or trustee over substantially all of its property that is not
discharged within [***] after such filing, (d)  is a party to any dissolution or liquidation, (e) files a petition under any bankruptcy
or insolvency act or has any such petition filed against it that is not discharged within [***] of the filing thereof, or (f) admits in
writing its inability generally to meet its obligations as they fall due in the general course, then the 

- 73 –

 
other Party may terminate this Agreement in its entirety effective immediately upon written notice to such Party.

13.5

Rights in Bankruptcy

.  

13.5.1

Applicability  of  11  U.S.C.  §  365(n).    All  rights  and  licenses  (collectively,  the  “Intellectual
Property”) granted under or pursuant to this Agreement, including all rights and licenses to use improvements or enhancements
developed during the Term, are intended to be, and shall otherwise be deemed to be, for purposes of Section 365(n) of the United
States Bankruptcy Code (the “Bankruptcy Code”) or any analogous provisions in any other country or jurisdiction, licenses of
rights to “intellectual property” as defined under Section 101(35A) of the Bankruptcy Code.  The Parties agree that the licensee
of  such  Intellectual  Property  under  this  Agreement  shall  retain  and  may  fully  exercise  all  of  its  rights  and  elections  under  the
Bankruptcy  Code,  including  Section  365(n)  of  the  Bankruptcy  Code,  or  any  analogous  provisions  in  any  other  country  or
jurisdiction.   All  of  the  rights  granted  to  either  Party  under  this  Agreement  shall  be  deemed  to  exist  immediately  before  the
occurrence of any bankruptcy case in which the other Party is the debtor.  

13.5.2

Rights of non-Debtor Party in Bankruptcy.  If a bankruptcy proceeding is commenced by or
against either Party under the Bankruptcy Code or any analogous provisions in any other country or jurisdiction, the non-debtor
Party  shall  be  entitled  to  a  complete  duplicate  of  (or  complete  access  to,  as  appropriate)  any  Intellectual  Property  and  all
embodiments of such Intellectual Property, which, if not already in the non-debtor Party’s possession, shall be delivered to the
non-debtor  Party  within  [***]  of  such  request;  provided,  that  the  debtor  Party  is  excused  from  its  obligation  to  deliver  the
Intellectual  Property  to  the  extent  the  debtor  Party  continues  to  perform  all  of  its  obligations  under  this  Agreement  and  the
Agreement  has  not  been  rejected  pursuant  to  the  Bankruptcy  Code  or  any  analogous  provision  in  any  other  country  or
jurisdiction.  

13.6

Termination in Entirety

.  

13.3.2 or by Harpoon pursuant to Section 13.2.1 or 13.4:

13.6.1

In the event of a termination of this Agreement in its entirety by AbbVie pursuant to Section

other than any Unblocking License granted pursuant to Section 2.4;

(a)

(b)

all rights and licenses granted by Harpoon hereunder shall immediately terminate;

all  rights  and  licenses  granted  by  AbbVie  hereunder  shall  immediately  terminate,

subject to the good faith negotiation of mutually agreeable terms and conditions for such Unblocking License; and

(c)

AbbVie  shall  grant  Harpoon  an  Unblocking  License  for  each  Accepted  Target,

solely in the case of termination pursuant to Section 13.3.2, upon the effective date
of AbbVie’s notice of termination (i) AbbVie will have no further diligence obligations under this Agreement and (ii) AbbVie
will not be required to make any milestone 

(d)

- 74 –

 
payments  to  Harpoon  under  this  Agreement  for  milestones  achieved  during  the  period  between  the  notice  of  termination  by
AbbVie under Section 13.3.2 and the effective date of termination or thereafter.

13.2.1 or 13.4:

13.6.2

In the event of a termination of this Agreement in its entirety by AbbVie pursuant to Sections

Development of Discovery Constructs and Licensed Products, including any obligations under ARTICLE 4; and

(a)

(b)

all rights and licenses granted by AbbVie hereunder shall immediately terminate;

Harpoon will have no further obligations under this Agreement with respect to the

all rights and licenses granted to AbbVie hereunder shall become [***], irrevocable,
unrestricted, and perpetual rights and licenses and the Parties shall [***], taking into consideration: (i) [***] or Licensed Product
due to termination; (ii) [***] Licensed Product; and (iii) [***].  If, despite good faith discussions, the Parties are unable to agree
on the consideration, then the dispute shall be resolved pursuant to Section 14.7.

(c)

13.7

Termination of Terminated Territory

.  In the event of a termination of this Agreement with respect to a country or other jurisdiction by AbbVie pursuant to Section
13.3.2 or with respect to a Terminated Territory by Harpoon pursuant to Section 13.2.2 (but not in the case of any termination of
this Agreement in its entirety), the term “Territory” shall be automatically amended to exclude the Terminated Territory and all
rights and licenses granted by Harpoon hereunder (a) shall automatically be deemed to be amended to exclude, if applicable, the
right  to  market,  promote,  detail,  distribute,  import,  sell,  offer  for  sale,  file  any  Drug  Approval  Application  for,  or  seek  any
Regulatory Approval for Discovery Construct or Licensed Products in such Terminated Territory, and (b) shall otherwise survive
and continue in effect in such Terminated Territory solely for the purpose of furthering any Commercialization of the Discovery
Constructs or Licensed Products in the Territory other than the Terminated Territory or any Development or Manufacturing in
support thereof.

13.8

Termination of Accepted Target

. In the event of a termination of this Agreement with respect to one Accepted Target (the “Terminated Target”)  pursuant  to
Sections 13.2.3 or 13.3.2 (but not in the case of any termination of this Agreement in its entirety) then:

13.8.1

the Terminated Target shall cease to be an Accepted Target;

all  rights  and  licenses  granted  by  Harpoon  hereunder  shall  automatically  be  deemed  to  be
amended  to  exclude  the  Terminated  Target  but  shall  otherwise  survive  and  continue  in  effect  for  the  remaining  Accepted
Target(s); 

13.8.2

- 75 –

 
all  rights  and  licenses  granted  by  AbbVie  hereunder  shall  automatically  be  deemed  to  be
amended  to  exclude  the  Terminated  Target  but  shall  otherwise  survive  and  continue  in  effect  for  the  remaining  Accepted
Target(s);

13.8.3

good faith negotiation of mutually agreeable terms and conditions for such Unblocking License;

13.8.4

AbbVie  shall  grant  Harpoon  an  Unblocking  License  for  the  Terminated  Target,  subject  to  the

Harpoon  will  have  no  further  obligations  under  this  Agreement  with  respect  to  the
Development of Discovery Constructs and Licensed Products that are directed to the Terminated Target, including any obligation
under ARTICLE 4 with respect to the Terminated Target; and

13.8.5

13.8.6

solely in the case of termination pursuant to Section 13.3.2, upon the effective date of AbbVie’s
notice of termination (i) AbbVie will have no further diligence obligations under this Agreement with respect to the Terminated
Target and (ii) AbbVie will not be required to make any milestone payments to Harpoon under this Agreement for milestones
achieved  with  respect  to  the  Terminated  Target  during  the  period  between  the  notice  of  termination  by  AbbVie  under  Section
13.3.2 and the effective date of termination or thereafter.

13.9

Remedies

.  Except as otherwise expressly provided herein, termination of this Agreement (either in its entirety or with respect to one (1) or
more country(ies) or other jurisdiction(s) or with respect to a Terminated Target) in accordance with the provisions hereof shall
not limit remedies that may otherwise be available in law or equity.

13.10

Accrued Rights; Surviving Obligations

.  

13.10.1

Termination or expiration of this Agreement (either in its entirety or with respect to one (1) or
more country(ies) or other jurisdiction(s) or with respect to a Terminated Target) for any reason shall be without prejudice to any
rights  that  shall  have  accrued  to  the  benefit  of  a  Party  prior  to  such  termination  or  expiration.    Such  termination  or  expiration
shall  not  relieve  a  Party  from  obligations  that  are  expressly  indicated  to  survive  the  termination  or  expiration  of  this
Agreement.    Without  limiting  the  foregoing,  ARTICLE  1  (Definitions),  ARTICLE  12  (Indemnification),  Sections  4.7.1(b)
(Regulatory Activities), 4.7.4 (Records), 5.4 (Product Trademarks), 7.11 (Interest on Late Payments), 7.12 (Audit), 7.13  (Audit
Dispute), 7.14 (Confidentiality), 7.16 (No Other Compensation), 8.1.1 (Harpoon Ownership), 8.1.2  (AbbVie  Ownership),  8.2.4
(Patent  Prosecution  and  Maintenance  of  Product-Specific  Patents),  10.2  (Confidentiality  Obligations),  10.3  (Permitted
Disclosures), 10.4 (Use of Name), 10.5 (Public Announcements), 10.7 (Return of Confidential Information), 10.8 (Survival), 13.6
(Termination  in  Entirety),  13.9  (Remedies),  13.10  (Accrued  Rights;  Surviving  Obligations),  14.4  (Assignment),  14.5
(Severability),  14.6  (Governing  Law,  Jurisdiction  and  Service),  14.7  (Dispute  Resolution),  14.8  (Notices),  14.9  (Entire
Agreement; Amendments), 14.10 (English Language), 14.11 (Equitable Relief), 14.12 (Waiver and Non-Exclusion of Remedies),
14.13  (No  Benefit  to  Third  Parties),  14.14  (Further  Assurance),  14.15  (Relationship  of  the  Parties),  14.16  (Performance  by
Affiliates), 14.17 (Counterparts; Facsimile Execution), 14.18 (References), 14.19 (Schedules), 14.20 (Construction) and, solely
with respect to Joint Program Patents, Sections 8.1.3 (Ownership of Joint Program Patents and Joint Program Know-How), 8.2.3
(Patent Prosecution and 

- 76 –

 
Maintenance  of  AbbVie  Background  Patents,  AbbVie  Program  Patents  and  Joint  Program  Patents),  8.2.5  (Cooperation),  8.3.2
(Enforcement  of  AbbVie  Background  Patents,  AbbVie  Program  Patents,  Product-Specific  Patents  and  Joint  Program  Patents),
8.3.5  (Cooperation),  8.3.6  (Recovery),  8.5.4  (AbbVie  Background  Patents,  AbbVie  Program  Patents,  Product-Specific  Patents
and  Joint  Program  Patents)  and  8.5.5  (Cooperation)  of  this  Agreement  shall  survive  the  termination  or  expiration  of  this
Agreement for any reason.  If this Agreement is terminated with respect to a Terminated Territory or a Terminated Target but not
in its entirety, then following such termination the foregoing provisions of this Agreement shall remain in effect with respect to
the  Terminated  Territory  or  Terminated  Target,  as  applicable  (to  the  extent  they  would  survive  and  apply  in  the  event  the
Agreement  expires  or  is  terminated  in  its  entirety),  and  all  provisions  not  surviving  in  accordance  with  the  foregoing  shall
terminate upon termination of this Agreement with respect to the Terminated Territory or Terminated Target, as applicable and be
of no further force and effect (and, for purposes of clarity, all provisions of this Agreement shall remain in effect with respect to
all countries in the Territory other than the Terminated Territory or with respect to the Accepted Target other than the Terminated
Target).  

13.10.2

Notwithstanding the termination of AbbVie’s licenses and other rights under this Agreement
or with respect to a particular Major Market or country or other jurisdiction or with respect to a Terminated Target, as the case
may be, AbbVie shall have the right for [***] after the effective date of such termination with respect to each Major Market or
country or other jurisdiction or Terminated Target with respect to which such termination applies to sell or otherwise dispose of
all Discovery Construct or Licensed Product then in its inventory and any in-progress inventory, in each case that is intended for
sale or disposition in such Major Market or country or other jurisdiction or, in the case of a Terminated Target, in the Territory, as
though  this  Agreement  had  not  terminated  with  respect  to  such  Major  Market  or  country  or  other  jurisdiction  or  Terminated
Target, as applicable, and such sale or disposition shall not constitute infringement of Harpoon’s or its Affiliates’ Patent or other
intellectual  property  or  other  proprietary  rights.    For  purposes  of  clarity,  AbbVie  shall  continue  to  make  payments  thereon  as
provided  in  ARTICLE  7  (as  if  this  Agreement  had  not  terminated  with  respect  to  such  Major  Market  or  country  or  other
jurisdiction or Terminated Target, as applicable).

14.1

Force Majeure

ARTICLE 14
MISCELLANEOUS

.  Neither  Party  shall  be  held  liable  or  responsible  to  the  other  Party  or  be  deemed  to  have  defaulted  under  or  breached  this
Agreement for failure or delay in fulfilling or performing any term of this Agreement when such failure or delay is caused by or
results from events beyond the reasonable control of the non-performing Party, including fires, floods, earthquakes, hurricanes,
embargoes,  shortages,  epidemics,  quarantines,  war,  acts  of  war  (whether  war  be  declared  or  not),  terrorist  acts,  insurrections,
riots,  civil  commotion,  strikes,  lockouts,  or  other  labor  disturbances  (whether  involving  the  workforce  of  the  non-performing
Party or of any other Person), acts of God or acts, omissions or delays in acting by any governmental authority (except to the
extent such delay results from the breach by the non-performing Party or any of its Affiliates of any term or condition of this
Agreement).  The non-performing Party shall notify the other Party of such force majeure within [***] after such occurrence by
giving written notice to the other Party stating the nature of the event, its anticipated duration, and any action 

- 77 –

 
being taken to avoid or minimize its effect.  The suspension of performance shall be of no greater scope and no longer duration
than is necessary and the non-performing Party shall use commercially reasonable efforts to remedy its inability to perform.  

14.2

Change in Control of Harpoon

.

14.2.1

Harpoon (or its successor) shall provide AbbVie with written notice of any Change in Control

of Harpoon or Acquisition by Harpoon within [***]

14.2.2

In the event [***]

14.3

Export Control

.  This Agreement is made subject to any restrictions concerning the export of products or technical information from the United
States or other countries that may be imposed on the Parties from time to time.  Each Party agrees that it will not export, directly
or indirectly, any technical information acquired from the other Party under this Agreement or any products using such technical
information  to  a  location  or  in  a  manner  that  at  the  time  of  export  requires  an  export  license  or  other  governmental  approval,
without first obtaining the written consent to do so from the appropriate agency or other governmental entity in accordance with
Applicable Law.

14.4

Assignment

.  

14.4.1

Without  the  prior  written  consent  of  the  other  Party,  such  consent  not  to  be  unreasonably
withheld,  conditioned  or  delayed,  neither  Party  shall  sell,  transfer,  assign,  delegate,  pledge,  or  otherwise  dispose  of,  whether
voluntarily, involuntarily, by operation of law or otherwise, this Agreement or any of its rights or duties hereunder; provided, that
either Party 

- 78 –

 
may make such an assignment without the other Party’s consent to its Affiliate or to a successor, whether in a merger, sale of
stock, sale of assets or any other transaction, of the business to which this Agreement relates.  With respect to an assignment to an
Affiliate,  the  assigning  Party  shall  remain  responsible  for  the  performance  by  such  Affiliate  of  the  rights  and  obligations
hereunder.  Any attempted assignment or delegation in violation of this Section 14.4 shall be void and of no effect.  All validly
assigned and delegated rights and obligations of the Parties hereunder shall be binding upon and inure to the benefit of and be
enforceable  by  and  against  the  successors  and  permitted  assigns  of  Harpoon  or  AbbVie,  as  the  case  may  be.    The  permitted
assignee  or  transferee  shall  assume  all  obligations  of  its  assignor  or  transferor  under  this  Agreement.    Without  limiting  the
foregoing, the grant of rights set forth in this Agreement shall be binding upon any successor or permitted assignee of Harpoon,
and the obligations of AbbVie, including the payment obligations, shall run in favor of any such successor or permitted assignee
of Harpoon’s benefits under this Agreement.  

14.4.2

[***].

14.5

Severability

.  If any provision of this Agreement is held to be illegal, invalid, or unenforceable under any present or future law, and if the
rights or obligations of either Party under this Agreement will not be materially and adversely affected thereby, (a) such provision
shall be fully severable, (b) this Agreement shall be construed and enforced as if such illegal, invalid, or unenforceable provision
had never comprised a part hereof, (c) the remaining provisions of this Agreement shall remain in full force and effect and shall
not be affected by the illegal, invalid, or unenforceable provision or by its severance herefrom, and (d) in lieu of such illegal,
invalid, or unenforceable provision, there shall be added automatically as a part of this Agreement a legal, valid, and enforceable
provision as similar in terms to such illegal, invalid, or unenforceable provision as may be possible and reasonably acceptable to
the Parties.  To the fullest extent permitted by Applicable Law, each Party hereby waives any provision of law that would render
any provision hereof illegal, invalid, or unenforceable in any respect.

14.6

Governing Law, Jurisdiction and Service

.

14.6.1

Governing  Law.    This  Agreement  or  the  performance,  enforcement,  breach  or  termination
hereof shall be interpreted, governed by and construed in accordance with the laws of the [***], excluding any conflicts or choice
of  law  rule  or  principle  that  might  otherwise  refer  construction  or  interpretation  of  this  Agreement  to  the  substantive  law  of
another jurisdiction; provided, that all questions concerning (a) inventorship of Patents under this Agreement shall be determined
in accordance with Section 8.1.4 and (b) the construction or effect of Patents shall be determined in accordance with the laws of
the country or other jurisdiction in which the particular Patent has been filed or granted, as the case may be.  The 

- 79 –

 
Parties agree to exclude the application to this Agreement of the United Nations Convention on Contracts for the International
Sale of Goods.

Service.  Each Party further agrees that service of any process, summons, notice or document
by registered mail to its address set forth in Section 14.8.2 shall be effective service of process for any action, suit, or proceeding
brought against it under this Agreement in any such court.

14.6.2

14.7

Dispute Resolution

.    Except  for  disputes  resolved  by  the  procedures  set  forth  in  Section  3.2.3  or  7.13,  if  a  dispute  arises  between  the  Parties  in
connection with or relating to this Agreement, including the determination of the scope or applicability of this Section 14.7 and
the agreement to arbitrate, or any document or instrument delivered in connection herewith (a “Dispute”), it shall be resolved
pursuant to this Section 14.7.

14.7.1

General.   Any  Dispute  shall  first  be  referred  to  the  Senior  Officers  of  the  Parties,  who  shall
confer  in  good  faith  on  the  resolution  of  the  issue.    Any  final  decision  mutually  agreed  to  by  the  Senior  Officers  shall  be
conclusive and binding on the Parties.  If the Senior Officers are not able to agree on the resolution of any such issue within [***]
(or such other period of time as mutually agreed by the Senior Officers) after such issue was first referred to them, then, except as
otherwise  set  forth  in  Section  14.7.2,  either  Party  may,  by  written  notice  to  the  other  Party,  elect  to  initiate  an  arbitration
proceeding pursuant to the procedures set forth in Section 14.7.3, which shall fully and finally settle the Dispute .

14.7.2

Intellectual Property Disputes.  In the event that a Dispute arises with respect to the validity,
scope, enforceability, inventorship or ownership of any Patent, Trademark or other intellectual property rights, and such Dispute
cannot be resolved in accordance with Section 14.7.1, unless otherwise agreed by the Parties in writing, such Dispute shall not be
submitted to an arbitration proceeding in accordance with Section 14.7.3 and instead, either Party may initiate litigation in a court
of competent jurisdiction, notwithstanding Section 14.6, in any country or other jurisdiction in which such rights apply.  In case
of a Dispute between the Parties with respect to inventorship, the Parties shall jointly select a patent attorney registered before the
United States Patent and Trademark Office and submit such Dispute to the mutually-selected patent attorney for resolution under
the  United  States  patent  law.   The  decision  of  such  patent  attorney  with  respect  to  inventorship  shall  be  final,  and  the  Parties
agree to be bound by the decision and share equally the expenses of such patent attorney.

procedures set forth in Schedule 14.7.3.

14.7.3

Arbitration.  Any arbitration proceeding under this Agreement shall take place pursuant to the

Adverse Ruling.   Any  determination  pursuant  to  this  Section 14.7  that  a  Party  is  in  material
breach of its material obligations hereunder shall specify a (nonexclusive) set of actions to be taken to cure such material breach,
if feasible.

14.7.4

Interim Relief.  Notwithstanding anything herein to the contrary, nothing in this Section 14.7
shall  preclude  either  Party  from  seeking  interim  or  provisional  relief,  including  a  temporary  restraining  order,  preliminary
injunction or other interim equitable relief 

14.7.5

- 80 –

 
concerning a Dispute, if necessary to protect the interests of such Party.  This Section shall be specifically enforceable.

14.8

Notices

.

14.8.1

Notice  Requirements.    Any  notice,  request,  demand,  waiver,  consent,  approval,  or  other
communication  permitted  or  required  under  this  Agreement  shall  be  in  writing,  shall  refer  specifically  to  this  Agreement  and
shall be deemed given only if (a) delivered by hand, (b) sent by facsimile transmission (with transmission confirmed), or (c) by
internationally  recognized  overnight  delivery  service  that  maintains  records  of  delivery,  addressed  to  the  Parties  at  their
respective addresses specified in Section 14.8.2 or to such other address as the Party to whom notice is to be given may have
provided to the other Party in accordance with this Section 14.8.1.  Such notice shall be deemed to have been given as of the date
delivered  by  hand  or  transmitted  by  facsimile  (with  transmission  confirmed)  or  on  the  second  Business  Day  (at  the  place  of
delivery) after deposit with an internationally recognized overnight delivery service.  Any notice delivered by facsimile shall be
confirmed by a hard copy delivered as soon as practicable thereafter.  This Section 14.8.1 is not intended to govern the day-to-day
business communications necessary between the Parties in performing their obligations under the terms of this Agreement.

14.8.2

Address for Notice.

If to AbbVie, to:

AbbVie Biotechnology LTD
c/o Conyers, Dill & Pearman,
Clarendon House,
2 Church Street,
Hamilton HM 11 Bermuda

with a copy (which shall not constitute notice) to:

AbbVie Inc.
1 N. Waukegan Road
North Chicago, IL 60064-6011 USA

Attention: [***]

Facsimile: [***]

If to Harpoon, to:

Harpoon Therapeutics, Inc.
131 Oyster Point Boulevard, Suite 300
South San Francisco, CA 94080
Attention:  [***]

- 81 –

 
 
 
 
 
 
with a copy (which shall not constitute notice) to:

Cooley LLP
3175 Hanover Street
Palo Alto, CA 94304
Attention:  [***]
Facsimile:  [***]

14.9

Entire Agreement; Amendments

.  This Agreement, together with the Schedules attached hereto, sets forth and constitutes the entire agreement and understanding
between  the  Parties  with  respect  to  the  subject  matter  hereof  and  all  prior  agreements,  understandings,  promises,  and
representations, whether written or oral, with respect thereto are superseded hereby (including the Prior NDA and the Original
Agreement, as previously amended). The foregoing shall not be interpreted as a waiver of any remedies available to either Party
as a result of any breach, (a) prior to the Effective Date, by the other Party (or its Affiliates) of its obligations under the Prior
NDA  or  (b)  prior  to  the  Amended  Effective  Date,  by  the  other  Party  (or  its  Affiliates)  of  its  obligations  under  the  Original
Agreement, as amended. Each Party confirms that it is not relying on any representations or warranties of the other Party except
as specifically set forth in this Agreement.  No amendment, modification, release, or discharge with respect to this Agreement
shall be binding upon the Parties unless in writing and duly executed by authorized representatives of both Parties.

14.10

English Language

.  This Agreement shall be written and executed in, and all other communications under or in connection with this Agreement
shall be in, the English language.  Any translation into any other language shall not be an official version thereof, and in the event
of any conflict in interpretation between the English version and such translation, the English version shall control.

14.11

Equitable Relief

.    Each  Party  acknowledges  and  agrees  that  the  restrictions  set  forth  in  Section  6.8  and  ARTICLE  8  and  ARTICLE  10  are
reasonable and necessary to protect the legitimate interests of the other Party and that such other Party would not have entered
into this Agreement in the absence of such restrictions, and that any breach or threatened breach of any provision of such Section
or Articles may result in irreparable injury to such other Party for which there will be no adequate remedy at law.  In the event of
a  breach  or  threatened  breach  of  any  provision  of  such  Section  or  Articles,  the  non-breaching  Party  shall  be  authorized  and
entitled  to  seek  from  any  court  of  competent  jurisdiction  injunctive  relief,  whether  preliminary  or  permanent,  specific
performance, and an equitable accounting of all earnings, profits, and other benefits arising from such breach, which rights shall
be  cumulative  and  in  addition  to  any  other  rights  or  remedies  to  which  such  non-breaching  Party  may  be  entitled  in  law  or
equity.  Both Parties agree to waive any requirement that the other (a) post a bond or other security as a condition for obtaining
any  such  relief,  and  (b)  show  irreparable  harm,  balancing  of  harms,  consideration  of  the  public  interest,  or  inadequacy  of
monetary damages as a remedy.  Nothing in this Section 14.11 is intended, or should be construed, to limit either Party’s right to
equitable relief or any other remedy for a breach of any other provision of this Agreement.

14.12

Waiver and Non-Exclusion of Remedies

.  Any term or condition of this Agreement may be waived at any time by the Party that is entitled to the benefit thereof, but no 

- 82 –

 
 
such waiver shall be effective unless set forth in a written instrument duly executed by or on behalf of the Party waiving such
term or condition.  The waiver by either Party hereto of any right hereunder or of the failure to perform or of a breach by the
other  Party  shall  not  be  deemed  a  waiver  of  any  other  right  hereunder  or  of  any  other  breach  or  failure  by  such  other  Party
whether of a similar nature or otherwise.  The rights and remedies provided herein are cumulative and do not exclude any other
right or remedy provided by Applicable Law or otherwise available except as expressly set forth herein.

14.13

No Benefit to Third Parties

.  Except as provided in ARTICLE 11, covenants and agreements set forth in this Agreement are for the sole benefit of the Parties
hereto and their successors and permitted assigns, and they shall not be construed as conferring any rights on any other Persons.

14.14

Further Assurance

.    Each  Party  shall  duly  execute  and  deliver,  or  cause  to  be  duly  executed  and  delivered,  such  further  instruments  and  do  and
cause to be done such further acts and things, including the filing of such assignments, agreements, documents, and instruments,
as  may  be  necessary  or  as  the  other  Party  may  reasonably  request  in  connection  with  this  Agreement  or  to  carry  out  more
effectively the provisions and purposes hereof, or to better assure and confirm unto such other Party its rights and remedies under
this Agreement.

14.15

Relationship of the Parties

.  It is expressly agreed that Harpoon, on the one hand, and AbbVie, on the other hand, shall be independent contractors and that
the  relationship  between  the  Parties  shall  not  constitute  a  partnership,  joint  venture,  or  agency  including  for  all  tax
purposes.  Neither Harpoon, on the one hand, nor AbbVie, on the other hand, shall have the authority to make any statements,
representations, or commitments of any kind, or to take any action, which shall be binding on the other, without the prior written
consent of the other Party to do so.  All persons employed by a Party shall be employees of such Party and not of the other Party
and all costs and obligations incurred by reason of any such employment shall be for the account and expense of such Party.

14.16

Performance by Affiliates

.  AbbVie may use one (1) or more of its Affiliates to perform its obligations and duties hereunder and such AbbVie Affiliates are
expressly  granted  certain  rights  herein;  provided  that  each  such  Affiliate  shall  be  bound  by  the  corresponding  obligations  of
AbbVie and, subject to an assignment to such Affiliate pursuant to Section 14.4,  AbbVie  shall  remain  liable  hereunder  for  the
prompt payment and performance of all their respective obligations hereunder.

14.17

Counterparts; Facsimile Execution

.  This Agreement may be executed in two (2) counterparts, each of which shall be deemed an original, but all of which together
shall  constitute  one  (1)  and  the  same  instrument.   This  Agreement  may  be  executed  by  facsimile  or  electronically  transmitted
signatures and such signatures shall be deemed to bind each Party hereto as if they were original signatures.

14.18

References

.  Unless otherwise specified, (a) references in this Agreement to any Article, Section or Schedule shall mean references to such
Article, Section or Schedule of this Agreement, (b) references in any Section to any clause are references to such clause of such
Section, and (c) references to any agreement, instrument, or other document in this Agreement 

- 83 –

 
refer  to  such  agreement,  instrument,  or  other  document  as  originally  executed  or,  if  subsequently  amended,  replaced,  or
supplemented  from  time  to  time,  as  so  amended,  replaced,  or  supplemented  and  in  effect  at  the  relevant  time  of  reference
thereto.  

14.19

Schedules

.  In the event of any inconsistencies between this Agreement and any schedules or other attachments hereto, the terms of this
Agreement shall control.

14.20

Construction

.  Except where the context otherwise requires, wherever used, the singular shall include the plural, the plural the singular, the use
of  any  gender  shall  be  applicable  to  all  genders  and  the  word  “or”  is  used  in  the  inclusive  sense  (and/or).    Whenever  this
Agreement  refers  to  a  number  of  days,  unless  otherwise  specified,  such  number  refers  to  calendar  days.   The  captions  of  this
Agreement  are  for  convenience  of  reference  only  and  in  no  way  define,  describe,  extend,  or  limit  the  scope  or  intent  of  this
Agreement or the intent of any provision contained in this Agreement.  The term “including,” “include,” or “includes” as used
herein shall mean “including, but not limited to,” and shall not limit the generality of any description preceding such term.  The
language of this Agreement shall be deemed to be the language mutually chosen by the Parties and no rule of strict construction
shall be applied against either Party hereto.  Each Party represents that it has been represented by legal counsel in connection with
this  Agreement  and  acknowledges  that  it  has  participated  in  the  drafting  hereof.    In  interpreting  and  applying  the  terms  and
provisions of this Agreement, the Parties agree that no presumption will apply against the Party which drafted such terms and
provisions.

[SIGNATURE PAGE FOLLOWS]

- 84 –

 
 
 
THIS  AMENDED  AND  RESTATED  DISCOVERY  COLLABORATION  AND  LICENSE  AGREEMENT  is  executed  by  the
authorized representatives of the Parties as of the Amended Effective Date.

HARPOON THERAPEUTICS, INC.

ABBVIE BIOTECHNOLOGY LTD.

By: /s/ Gerald McMahon

Name: Gerald McMahon

Title: President and CEO

By: /s/ Robert Michael

Name: Robert Michael

Title: Director

[SIGNATURE PAGE TO AMENDED AND RESTATED DISCOVERY COLLABORATION AND LICENSE AGREEMENT]

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Schedule 1.8

[***]

 
 
Schedule 1.55

Discovery Construct Success Criteria

[***]

 
 
 
 
Schedule 1.57

Discovery Research Plan

TCR Discovery Research Plan

[***]

Antibody Discovery Research Plan
[***]

 
 
 
 
 
 
Schedule 2.1.3

Unavailable Targets as of the Amended Effective Date

[***]

 
 
 
 
Schedule 4.6

Pre-Approved Third Party Providers

[***]

 
 
 
 
Schedule 11.2.1

Existing Patents

[***]

 
 
 
 
Schedule 14.7.3

[***]

 
 
 
EXECUTION COPY

Confidential

Exhibit 10.18

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS BOTH NOT MATERIAL AND WOULD BE COMPETITIVELY HARMFUL IF
PUBLICLY DISCLOSED.

DEVELOPMENT AND OPTION AGREEMENT

between

HARPOON THERAPEUTICS, INC.

and

ABBVIE BIOTECHNOLOGY LTD

Dated as of November 20, 2019

 
 
 
 
 
 
 
 
 
 
 
TABLE OF CONTENTS

ARTICLE 1 DEFINITIONS1

ARTICLE 2 COLLABORATION MANAGEMENT18

2.1
2.2
2.3
2.4
2.5
2.6
2.7

Joint Governance Committee.
General Provisions Applicable to the JGC.
Discontinuation of the JGC.
Interactions Between the JGC and Internal Teams.
CMC Working Group.
Working Groups.
Expenses.

21

21

21

ARTICLE 3 DEVELOPMENT AND REGULATORY21

3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8

24

Initial Development Plan and Activities.
AbbVie Option.
[***].
Post-Exercise Development Activities.
Supply of Technology for Development Purposes.
Expenses and Invoicing.
27
Subcontracting.
Regulatory Matters.

28

25

28

ARTICLE 4 COMMERCIALIZATION30

18

20

19

20

21

26

27

4.1
4.2
4.3
4.4
4.5

In General.
Commercialization Diligence.
Booking of Sales; Distribution.
Product Trademarks.
Commercial Supply of Licensed Compounds or Licensed Products.

30

30

31

31

31

ARTICLE 5 GRANT OF RIGHTS33

ARTICLE 6 PAYMENTS AND RECORDS36

5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9

6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8

33

34

Grants to AbbVie.
Grants to Harpoon.
Sublicenses.
Distributorships.
Co-Promotion Rights.
Retention of Rights.
Confirmatory Patent License.
Exclusivity with Respect to the Territory.
In-License Agreements.

34

34

34

34

35

36

Upfront Payment.
Development and Regulatory Milestones.
First Commercial Sales Milestones.
Sales-Based Milestones.
Royalties.
Royalty Payments and Reports.
Mode of Payment; Offsets.
Withholding Taxes.

38

39

40

40

35

36

37

35

37

 
 
 
 
 
 
 
 
 
6.9
6.10
6.11
6.12
6.13
6.14
6.15

Indirect Taxes.
Interest on Late Payments.
Audit.
Audit Dispute.
Confidentiality.
[***]
No Other Compensation.

41

41

40

41
41

41

42

ARTICLE 7 INTELLECTUAL PROPERTY42

7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9

Ownership of Intellectual Property.
Maintenance and Prosecution of Patents.
Enforcement of Patents.
Infringement Claims by Third Parties.
Invalidity or Unenforceability Defenses or Actions.
Product Trademarks.
International Nonproprietary Name.
Inventor's Remuneration.
Common Interest.

49

50

45

50

ARTICLE 8 PHARMACOVIGILANCE AND SAFETY50

8.1
8.2

Pharmacovigilance.
Global Safety Database.

50

50

ARTICLE 9 CONFIDENTIALITY AND NON-DISCLOSURE51

9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8

Product Information.
Confidentiality Obligations.
Permitted Disclosures.
Use of Name.
Public Announcements.
Publications.
Return of Confidential Information.
Survival.

54

54

51

51

52

53

53

ARTICLE 10 REPRESENTATIONS AND WARRANTIES55

10.1
10.2
10.3
10.4
10.5

ARTICLE 11 INDEMNITY60

Mutual Representations and Warranties.
Additional Representations and Warranties of Harpoon.
Covenants of Harpoon.
Covenants of AbbVie.
DISCLAIMER OF WARRANTIES.

58

58

11.1
11.2
11.3
11.4
11.5
11.6

Indemnification of Harpoon.
Indemnification of AbbVie.
Notice of Claim.
Control of Defense.
Special, Indirect, and Other Losses.
61
Insurance.

60

60

60

61

ARTICLE 12 TERM AND TERMINATION62

12.1

- ii –

Term.

62

42

43

48

50

48

55

55

54

59

61

 
 
 
 
 
 
 
 
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
12.10

Termination for Material Breach.
Additional Termination Rights by AbbVie.
Termination for Insolvency.
Rights in Bankruptcy.
Termination in Entirety.
Reversion of Harpoon Products.
Termination of Terminated Territory.
Remedies.
Accrued Rights; Surviving Obligations.

67

63

63

63

62

63

66

67

67

ARTICLE 13 MISCELLANEOUS68

13.1
13.2
13.3
13.4
13.5
13.6
13.7
13.8
13.9
13.10
13.11
13.12
13.13
13.14
13.15
13.16
13.17
13.18
13.19
13.20

69

68

69
70

Force Majeure.
Change in Control of Harpoon.
Export Control.
Assignment.
Severability.
Governing Law, Jurisdiction and Service.
Dispute Resolution.
71
Notices.
Entire Agreement; Amendments.
English Language.
Equitable Relief.
Waiver and Non-Exclusion of Remedies.
No Benefit to Third Parties.
Further Assurance.
Relationship of the Parties.
Performance by Affiliates.
Counterparts; Facsimile Execution.
References.
Schedules.
Construction.

73
73

73

70

72

72

68

72

70

72

73

72

73
73

73

SCHEDULES

Schedule 1.84
Schedule 1.99
Schedule 3.7
Schedule 10.2
Schedule 10.2.1
Schedule 13.7.3

- iii –

Initial Development Plan
Licensed Compound
Pre-Approved Third Party Providers
Disclosure Schedules
Existing Patents
Arbitration

 
 
 
 
 
DEVELOPMENT AND OPTION AGREEMENT

This Development and Option Agreement (the “Agreement”)  is  made and  entered  into  effective  as  of  November  20,
2019 (the “Effective Date”) by and between Harpoon Therapeutics, Inc., a Delaware corporation (“Harpoon”), and AbbVie Biotechnology
Ltd, a Bermuda corporation (“AbbVie”).  Harpoon and AbbVie are sometimes referred to herein individually as a “Party” and collectively as
the “Parties.”

RECITALS

Compound (as defined herein) and Licensed Products (as defined herein) in the Territory (as defined herein); and

WHEREAS,  Harpoon  Controls  (as  defined  herein)  certain  intellectual  property  rights  with  respect  to  the  Licensed

WHEREAS, Harpoon wishes to grant an option to a license to AbbVie, and AbbVie wishes to take, such option to a
license under such intellectual property rights to develop and commercialize Licensed Products in the Territory, in each case in accordance
with the terms and conditions set forth below.

NOW, THEREFORE, in consideration of the premises and the mutual promises and conditions hereinafter set forth,
and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties, intending to be legally
bound, do hereby agree as follows:

ARTICLE 1
DEFINITIONS

Unless otherwise specifically provided herein, the following terms shall have the following meanings:

1.1

1.2

1.3

1.4

1.5

1.6

1.7

“AbbVie” has the meaning set forth in the preamble hereto.

[***] has the meaning set forth in [***]

[***] has the meaning set forth in [***].

[***] has the meaning set forth in [***]

[***] has the meaning set forth in [***].

“AbbVie [***] Rights” has the meaning set forth in Section 5.9.2.

“AbbVie Indemnitees” has the meaning set forth in Section 11.2.

1.8

“AbbVie Know-How” means all Information that is (a) Controlled by AbbVie or any of its Affiliates during
the Term, (b) developed or acquired by AbbVie or any of its Affiliates during the Term as a result of performance under this Agreement, (c)
not  generally  known  and  (d)  necessary  or  reasonably  useful  for  the  Exploitation  of  the  Licensed  Compound  or  a  Licensed  Product,  but
excluding any Joint Know-How or Information published in any AbbVie Patents or Joint Patents.

1.9

“AbbVie Patents” means all of the Patents that (a) are Controlled by AbbVie or any of its Affiliates during
the  Term,  (b)  claim  inventions  made  or  conceived  by  or  on  behalf  of  AbbVie  or  any  of  its  Affiliates  during  the  Term  as  a  result  of
performance under this Agreement, and (c) are necessary or reasonably useful (or, with respect to patent applications, would be necessary or
reasonably useful if such

 
 
 
patent applications were to issue as patents) for the Exploitation of the Licensed Compound or a Licensed Product, but excluding any Joint
Patents.

1.10

1.11

1.12

“AbbVie Reversion IP” has the meaning set forth in Section 12.7.1.

“AbbVie Withholding Tax Action” has the meaning set forth in Section 6.8.2.

“Acceptance”  means,  with  respect  to  a  Drug  Approval  Application,  receipt  of  written  notice  from  the

applicable Regulatory Authority indicating that such Drug Approval Application has been accepted for filing and further review.

of accounts in accordance with United States Generally Accepted Accounting Principles.

1.13

“Accounting Standards” means, with respect to a Party, that such Party shall maintain records and books

“Acquisition”  means,  with  respect  to  a  Party,  a  merger,  acquisition  (whether  of  all  of  the  stock  or  all  or
substantially all of the assets of a Person or any operating or business division of a Person) or similar transaction by or with the Party, other
than a Change in Control of the Party.

1.14

1.15

“Adverse Ruling” has the meaning set forth in Section 12.2.1.

1.16

“Affiliate” means, with respect to a Party, any Person that, directly or indirectly, through one (1) or more
intermediaries, controls, is controlled by or is under common control with such Party.  For purposes of this definition, “control” and, with
correlative  meanings,  the  terms  “controlled  by”  and  “under  common  control  with”  means  (a)  the  possession,  directly  or  indirectly,  of  the
power to direct the management or policies of a Person, whether through the ownership of voting securities, by contract relating to voting
rights  or  corporate  governance,  or  otherwise;  or  (b)  the  ownership,  directly  or  indirectly,  of  more  than  fifty  percent  (50%)  of  the  voting
securities  or  other  ownership  interest  of  a  Person  (or,  with  respect  to  a  limited  partnership  or  other  similar  entity,  its  general  partner  or
controlling entity).  The Parties acknowledge that in the case of certain entities organized under the laws of certain countries outside of the
United States, the maximum percentage ownership permitted by law for a foreign investor may be less than fifty percent (50%), and that in
such case such lower percentage shall be substituted in the preceding sentence, provided that such foreign investor has the power to direct the
management or policies of such entity.

1.17

1.18

 “Agreement” has the meaning set forth in the preamble hereto.

“Alliance Manager” has the meaning set forth in Section 2.2.5.

1.19

“Applicable  Law”  means  federal,  state,  local,  national  and  supra-national  laws,  statutes,  rules,  and
regulations,  including  any  rules,  regulations,  regulatory  guidelines,  or  other  requirements  of  the  Regulatory  Authorities,  major  national
securities exchanges or major securities listing organizations, that may be in effect from time to time during the Term and applicable to a
particular activity or country or other jurisdiction hereunder.

1.20

1.21

1.22

“Audit Expert” has the meaning set forth in Section 6.12.

“Bankruptcy Code” has the meaning set forth in Section 12.5.1.

“BCMA” means that specific protein known as B-cell maturation antigen or tumor necrosis factor receptor

superfamily member 17 (TNFRSF17) or CD269 in addition to any other known aliases [***].

- 2 –

 
1.23

“Biosimilar Application” has the meaning set forth in Section 7.3.3.

1.24

“Biosimilar  Product”  means,  with  respect  to  a  particular  Licensed  Product  in  a  particular  country,  a
biologic product that is (a) substantially similar to or interchangeable with such Licensed Product, such that the application for a BLA for
such biologic product submitted to the applicable Regulatory Authority relies in whole or in part on a prior BLA granted to such Licensed
Product  (including  any  application  for  such  biological  product  submitted  under  Section  351(k)  of  the  PHSA  or  successor  law,  or  other
analogous Applicable Law, citing the Licensed Product as the reference product), or (b) determined by the applicable Regulatory Authority to
be interchangeable with such Licensed Product, as set forth at 42 U.S.C. § 262(k)(4) or successor law, or other analogous Applicable Law
outside  of  the  United  States.  A  biological  product  licensed  under  the  same  BLA  as  the  Licensed  Product  will  not  constitute  a  Biosimilar
Product.

1.25

1.26

1.27

1.28

New York are open for business.

“BLA” has the meaning set forth in the definition of “Drug Approval Application.”

“Board of Directors” has the meaning set forth in the definition of “Change in Control.”

“Breaching Party” has the meaning set forth in Section 12.2.1.

“Business Day” means a day other than a Saturday or Sunday on which banking institutions in New York,

1.29

“Calendar Quarter” means each successive period of three (3) calendar months commencing on January
1, April 1, July 1 and October 1, except that the first Calendar Quarter of the Term shall commence on the Effective Date and end on the day
immediately prior to the first to occur of January 1, April 1, July 1 or October 1 after the Effective Date, and the last Calendar Quarter shall
end on the last day of the Term.

1.30

“Calendar Year” means each successive period of twelve (12) calendar months commencing on January 1
and ending on December 31, except that the first Calendar Year of the Term shall commence on the Effective Date and end on December 31
of the year in which the Effective Date occurs and the last Calendar Year of the Term shall commence on January 1 of the year in which the
Term ends and end on the last day of the Term.

occurs after the Effective Date:

1.31

“Change  in  Control,”  with  respect  to  a  Party,  shall  be  deemed  to  have  occurred  if  any  of  the  following

1.31.1

any “person” or “group” (as such terms are defined below) (a) is or becomes the “beneficial
owner” (as defined below), directly or indirectly, of shares of capital stock or other interests (including partnership interests) of such Party
then  outstanding  and  normally  entitled  (without  regard  to  the  occurrence  of  any  contingency)  to  vote  in  the  election  of  the  directors,
managers or similar supervisory positions (“Voting Stock”) of such Party representing fifty percent (50%) or more of the total voting power
of all outstanding classes of Voting Stock of such Party or (b) has the power, directly or indirectly, to elect a majority of the members of the
Party’s board of directors, or similar governing body (“Board of Directors”); excluding in each case (subclauses (a) and (b)) [***]; or

such  Party  enters  into  a  merger,  consolidation  or  similar  transaction  with  another  Person
(whether or not such Party is the surviving entity) and as a result of such merger, consolidation or similar transaction (a) the members of the
Board  of  Directors  of  such  Party  immediately  prior  to  such  transaction  constitute  less  than  a  majority  of  the  members  of  the  Board  of
Directors of such Party or such surviving Person immediately following such transaction or (b) the Persons that beneficially owned, directly

1.31.2

- 3 –

 
or indirectly, the shares of Voting Stock of such Party immediately prior to such transaction cease to beneficially own, directly or indirectly,
shares of Voting Stock of such Party representing at least a majority of the total voting power of all outstanding classes of Voting Stock of the
surviving  Person  in  substantially  the  same  proportions  as  their  ownership  of  Voting  Stock  of  such  Party  immediately  prior  to  such
transaction; or

properties or assets representing all or substantially all of such Party’s assets to which this Agreement relates; or

1.31.3

such  Party  sells  or  transfers  to  any  Third  Party,  in  one  (1)  or  more  related  transactions,

dissolution of such Party.

1.31.4

the  holders  of  capital  stock  of  such  Party  approve  a  plan  or  proposal  for  the  liquidation  or

For the purpose of this definition of Change in Control, (a) “person” and “group” have the meanings given such terms under Section 13(d)
and 14(d) of the United States Securities Exchange Act of 1934 and the term “group” includes any group acting for the purpose of acquiring,
holding or disposing of securities within the meaning of Rule 13d-5(b)(1) under the said Act; (b) a “beneficial owner” shall be determined in
accordance  with  Rule  13d-3  under  the  aforesaid  Act;  and  (c)  the  terms  “beneficially  owned”  and  “beneficially  own”  shall  have  meanings
correlative to that of “beneficial owner.”

1.32

[***]

“Clinical Data” means [***] Information with respect to any Licensed Compound or Licensed Product and
made, collected, or otherwise generated under or in connection with Clinical Studies, including any data (including raw data), reports, and
results with respect thereto.

1.33

1.34

“Clinical Studies” means Phase 0, Phase I, Phase II, Phase III, and such other tests and studies in human
subjects that are required by Applicable Law, or otherwise recommended by the Regulatory Authorities, to obtain or maintain Regulatory
Approvals for a Licensed Product for one (1) or more indications, including tests or studies that are intended to expand the Product Labeling
for such Licensed Product with respect to such indication.  

1.35

1.36

“CMC” has the meaning set forth in the definition of “Initial Development Plan.”

“CMC Working Group” has the meaning set forth in Section 2.5.

1.37

“Combination Product” means a Licensed Product that is: (a) sold in the form of a combination product
containing both a Licensed Compound and one (1) or more other therapeutically active pharmaceutical or biologic products; or (b) sold in a
form that contains (or is sold bundled with) any (i) diagnostic product or (ii) other product that is administered separately from the Licensed
Product, in both cases (subclauses (a) and (b)) sold as a unit at a single price and excluding any Delivery System.

1.38

“Commercialization” means any and all activities directed to the preparation for sale of, offering for sale
of, or sale of a Licensed Compound or Licensed Product, including activities related to marketing, promoting, distributing, importing and
exporting such Licensed Compound or Licensed Product, and interacting with Regulatory Authorities regarding any of the foregoing.  When
used  as  a  verb,  “to  Commercialize”  and  “Commercializing”  means  to  engage  in  Commercialization,  and  “Commercialized”  has  a
corresponding meaning.

1.39

“Commercially Reasonable Efforts” means with respect to [***]. 

- 4 –

 
1.40

1.41

[***]  

“Competitor” means any Person that [***], or (b) that [***].  

1.42

“Confidential Information” means any Information provided orally, visually, in writing or other form by
or on behalf of one (1) Party (or an Affiliate or representative of such Party) to the other Party (or to an Affiliate or representative of such
other Party) in connection with this Agreement, whether prior to, on, or after the Effective Date, including Information relating to the terms
of  this  Agreement,  the  Licensed  Compound  or  any  Licensed  Product  (including  the  Regulatory  Documentation  and  regulatory  data),  any
Exploitation  of  the  Licensed  Compound  or  any  Licensed  Product,  any  know-how  with  respect  thereto  developed  by  or  on  behalf  of  the
disclosing  Party  or  its  Affiliates,  or  the  scientific,  regulatory  or  business  affairs  or  other  activities  of  either  Party.    Notwithstanding  the
foregoing, (a) Joint Know-How shall be deemed to be the Confidential Information of both Parties, and both Parties shall be deemed to be the
receiving  Party  and  the  disclosing  Party  with  respect  thereto,  and  (b)  following  the  License  Option  Exercise  Closing  Date,  all  Regulatory
Documentation owned by AbbVie pursuant to Section 3.8.2 shall be deemed to be the Confidential Information of AbbVie, and AbbVie shall
be deemed to be the disclosing Party and Harpoon shall be deemed to be the receiving Party with respect thereto.  In addition, all information
disclosed by Harpoon to AbbVie under the Prior NDA shall be deemed to be Harpoon’s Confidential Information disclosed hereunder, and all
information disclosed by AbbVie Inc. to Harpoon under the Prior NDA shall be deemed to be AbbVie’s Confidential Information disclosed
hereunder.

- 5 –

 
1.43

“Control” means, with respect to any item of Information, Regulatory Documentation, material, Patent, or
other property right, the possession of the right, whether directly or indirectly, and whether by ownership, license or otherwise (other than by
operation of the license and other grants in Sections 5.1 or 5.2), to grant a license, sublicense or other right (including the right to reference
Regulatory Documentation) to or under such Information, Regulatory Documentation, material, Patent, or other property right as provided
for  herein  without  violating  the  terms  of  any  agreement  or  other  arrangement  with  any  Third  Party.  “Controlled”  has  a  corresponding
meaning.

1.44

1.45

1.46

“CSR Notification Date” has the meaning set forth in Section 12.6.3(e).

“Default Notice” has the meaning set forth in Section 12.2.1.

“Delivery System” has the meaning set forth in the definition of “Net Sales.”

1.47

“Development”  means  all  activities  related  to  pre-clinical  and  other  non-clinical  testing,  test  method
development  and  stability  testing,  toxicology,  formulation,  process  development,  manufacturing  scale-up,  qualification  and  validation,
quality  assurance/quality  control,  Clinical  Studies,  including  Manufacturing  in  support  thereof,  statistical  analysis  and  report  writing,  the
preparation and submission of Drug Approval Applications, regulatory affairs with respect to the foregoing and all other activities necessary
or reasonably useful or otherwise requested or required by a Regulatory Authority as a condition or in support of obtaining or maintaining a
Regulatory  Approval.    When  used  as  a  verb,  “Develop”  means  to  engage  in  Development.    For  purposes  of  clarity,  Development  shall
include any submissions and activities required in support thereof, required by Applicable Laws or a Regulatory Authority as a condition or
in support of obtaining a pricing or reimbursement approval for an approved Licensed Product.

applicable.

1.48

“Development  Report  Review  Deadline”  means  [***]  following  the  initial  delivery  of  any  [***],  as

1.49

1.50

“Dispute” has the meaning set forth in Section 13.7.

“Distributor” has the meaning set forth in Section 5.4.

“Divestiture” means, with respect to a Party, (a) the divestiture [***] through [***] or [***] with respect to
[***]  (for  clarity,  the  [***]  for  any  such  divestiture),  or  (b)  [***].    When  used  as  a  verb,  “Divest”  and  “Divested”  means  to  cause  a
Divestiture.

1.51

1.52

“Dollars” or “$” means United States Dollars.

1.53

“Drug Approval Application” means a Biologics License Application (a “BLA”) as defined in the PHSA,
or  any  corresponding  foreign  application  in  the  Territory,  including,  with  respect  to  the  European  Union,  a  Marketing  Authorization
Application (a “MAA”) filed with the EMA or with the applicable Regulatory Authority of a country in Europe with respect to the mutual
recognition or any other national approval procedure. 

- 6 –

 
from AbbVie pursuant to [***] prior to the date of AbbVie’s receipt of the [***].  

1.54

“[***]” means the [***] by Harpoon to AbbVie within [***] following Harpoon’s receipt of written notice

1.55

1.56

substantially the same function.

1.57

1.58

“Effective Date” means the effective date of this Agreement as set forth in the preamble hereto.

“EMA”  means  the  European  Medicines  Agency  and  any  successor  agency(ies)  or  authority  having

“European Major Market” means each of [***].

“European Union” or “E.U.” means the economic, scientific, and political organization of member states

known as the European Union, as its membership may be altered from time to time, and any successor thereto.

1.59

“Existing Patents” has the meaning set forth in Section 10.2.1.

“Exploit,” “Exploited” or “Exploitation” means to make, have made, import, export, use, sell, or offer for
sale, including to Develop, Commercialize, register, modify, enhance, improve, Manufacture, have Manufactured, hold, or keep (whether for
disposal or otherwise), formulate, optimize, have used, export, transport, distribute, promote, market, have sold or otherwise dispose of.

1.60

having substantially the same function.

1.61

“FDA” means the United States Food and Drug Administration and any successor agency(ies) or authority

“FFDCA”  means  the  United  States  Federal  Food,  Drug,  and  Cosmetic  Act,  21  U.S.C.  §  301  et seq.,  as
amended  from  time  to  time,  together  with  any  rules,  regulations  and  requirements  promulgated  thereunder  (including  all  additions,
supplements, extensions, and modifications thereto).

1.62

1.63

“Field” means all human and non-human diagnostic, prophylactic, and therapeutic uses.

“Final Development Report”  means  the  final  written  data  package  delivered  by  Harpoon  to  AbbVie  in
accordance  with  Section 3.1.3,  after  the  completion  of  all  activities  under  the  Initial  Development  Plan,  including,  for  clarity,  [***],  and
comprised of the [***].  The Final Development Report shall include [***].  

1.64

- 7 –

 
“First  Commercial  Sale”  means,  with  respect  to  a  Licensed  Product  and  a  country,  the  first  sale  for
monetary  value  for  use  or  consumption  by  the  end  user  of  such  Licensed  Product  in  such  country  after  Regulatory  Approval  for  such
Licensed Product has been obtained in such country.  [***] shall not be construed as a First Commercial Sale.

1.65

1.66

1.67

“Harpoon” has the meaning set forth in the preamble hereto.

“Harpoon  In-License  Agreement”  means  [***]  agreement  between  Harpoon  and  a  Third  Party  under

which AbbVie is granted a sublicense or other right under this Agreement as provided in Section 5.9.

1.68

“Harpoon Indemnitees” has the meaning set forth in Section 11.1.

1.69

“Harpoon Know-How” means all Information that is (a) Controlled by Harpoon or any of its Affiliates as
of the Effective Date or at any time during the Term, (b) not generally known and (c) necessary or reasonably useful for the Exploitation of
any Licensed Compound or any Licensed Product, but excluding any Joint Know-How or Information published in any (i) Harpoon Patents
or (ii) Joint Patents.  

1.70

“Harpoon Patents” means all of the Patents that are (a) Controlled by Harpoon or any of its Affiliates as of
the Effective Date or at any time during the Term and (b) necessary or reasonably useful (or, with respect to Patent applications, would be
necessary or reasonably useful if such Patent applications were to issue as Patents) for the Exploitation of any Licensed Compound or any
Licensed Product, but excluding Joint Patents.  The Harpoon Patents include the Existing Patents.

1.71

1.72

1.73

1.74

1.75

[***] has the meaning set forth in [***].

“Harpoon Reversion Products” has the meaning set forth in Section 12.6.1.

“HSR Act” means the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended.

“HSR Filing” has the meaning set forth in Section 3.2.4(b).

“In-Licensed Patents” has the meaning set forth in Section 10.2.3.

1.76

“IND”  means  an  application  filed  with  a  Regulatory  Authority  for  authorization  to  commence  Clinical
Studies, including (a) an Investigational New Drug Application as defined in the FFDCA or any successor application or procedure filed with
the FDA, (b) any equivalent thereof in other countries or regulatory jurisdictions, (e.g., a Clinical Trial Application (CTA) in the European
Union) and (c) all supplements, amendments, variations, extensions and renewals thereof that may be filed with respect to the foregoing.

1.77

1.78

1.79

“Indemnification Claim Notice” has the meaning set forth in Section 11.3.

“Indemnified Party” has the meaning set forth in Section 11.3.

“Indication” means, with respect to a Licensed Product, a use to which such Licensed Product is intended

to be put for the treatment, prevention, mitigation, cure or diagnosis of a recognized disease 

- 8 –

 
or condition, or of a manifestation of a recognized disease or condition, or for the relief of symptoms associated with a recognized disease or
condition, in each case for any size patient population, which, if such Licensed Product is approved in the U.S., would be reflected in the
“Indications and Usage” section of labeling pursuant to 21 C.F.R. §201.57(c)(2) or, to the extent applicable, any comparable labeling section
outside  the  U.S.,  subject  to  the  following:  (a)  subtypes  of  the  same  disease  or  condition  are  not  additional  Indications  for  such  Licensed
Product; (b) different symptom domains or domains of impairment of the same disease or condition are not additional Indications for such
Licensed Product; (c) the approved use of such Licensed Product for such disease in different combinations or co-therapies of treatments are
not additional Indications for such Licensed Product (e.g., monotherapy vs. add-on or combination therapy with another agent in the same
disease); (d) treatment, prevention and cure of the same disease or the same disease subtype with such Licensed Product are not additional
Indications for such Licensed Product; (e) the approved use of such Licensed Product for such disease in a different line of treatment or a
different temporal position in a treatment algorithm for the same disease or condition are not additional Indications for such Licensed Product
(e.g., first line vs. second line therapy in the same disease or condition); and (f) treatment of the same disease or condition with such Licensed
Product in an expanded, modified or additional patient population are not additional Indications for such Licensed Product.

1.80

1.81

“Indirect Taxes” has the meaning set forth in Section 6.9.

[***]

1.82

“Information” means all information of a technical, scientific, business and other nature, including know-
how,  technology,  means,  methods,  processes,  practices,  formulae,  instructions,  skills,  techniques,  procedures,  experiences,  ideas,  technical
assistance,  designs,  drawings,  assembly  procedures,  computer  programs,  apparatuses,  specifications,  data,  results  and  other  material,
regulatory data, and other biological, chemical, pharmacological, toxicological, pharmaceutical, physical and analytical, pre-clinical, clinical,
safety,  manufacturing  and  quality  control  data  and  information,  including  study  designs  and  protocols,  reagents  (including  all  physical
materials in connection with any of the foregoing such as plasmids, proteins, cell lines, assays, materials generated in connection with any
CMC activities and compounds) and biological methodology; in each case (whether or not confidential, proprietary, patented or patentable,
of commercial advantage or not) in written, electronic or any other form now known or hereafter developed.

1.83

“Initial  Development  Activities”  means  any  and  all  Development  activities  set  forth  in  the  Initial
Development  Plan  to  be  performed  by  Harpoon  (or,  pursuant  to  Section 3.1.2,  AbbVie)  in  order  to  advance  the  Licensed  Compound  and
Licensed Product to the point of readiness to commence [***] (or to proceed directly to pivotal clinical trials, if applicable) and ultimately
support the filing of Drug Approval Applications and obtain Regulatory Approvals for a Licensed Product in the Field in the Territory.

1.84

“Initial  Development  Plan”  means  a  development  plan  for  the  Licensed  Compounds  and  Licensed
Products  setting  forth  (a)  in  reasonable  detail  all  Development  and  regulatory  activities  to  be  performed  by  Harpoon  with  respect  to  the
Licensed Compounds and Licensed Products through completion of the Phase I/IB Trial, including related activities as applicable (but, for
clarity, except with respect to [***]), (b) all Clinical Data and other Information required to be delivered to AbbVie pursuant to Section 1.112
in order for AbbVie to determine whether to exercise the License Option, and (c) all Information to be included in the Final Development
Report (i.e. as a result of

- 9 –

 
activities conducted after the delivery of the Opt-In Development Report), which Initial Development Plan is attached as Schedule 1.84, as
the same may be amended from time to time in accordance with the terms hereof.  

in such Clinical Study.

1.85

“Initiation” or “Initiate” means, with respect to a Clinical Study, the first dosing of the first human subject

1.86

1.87

1.88

1.89

1.90

1.91

“Intellectual Property” has the meaning set forth in Section 12.5.1.

“Joint Governance Committee” or “JGC” has the meaning set forth in Section 2.1.1.

“Joint Intellectual Property Rights” has the meaning set forth in Section 7.1.2.

“Joint Know-How” has the meaning set forth in Section 7.1.2.

“Joint Patents” has the meaning set forth in Section 7.1.2.

“Knowledge” means [***] of the [***] of a Party, or any personnel holding positions equivalent to such

job titles (but only to the extent such positions exist at such Party).

1.92

1.93

1.94

1.95

1.96

1.97

1.98

1.99

[***]

[***]

[***]

“License Option” has the meaning set forth in Section 3.2.3.

“License Option Exercise Closing Date” has the meaning set forth in Section 3.2.4.

“License Option Exercise Notice” has the meaning set forth in Section 3.2.3.

“License Option Period” has the meaning set forth in Section 3.2.3.

“Licensed  Compound”  means  (a)  the  compound  known  as  HPN217  (as  described  on  Schedule  1.99),

[***].

combination with one (1) or more other active ingredients, in any and all forms, in 

1.100

“Licensed Product” means any product, or portion thereof, containing a Licensed Compound, alone or in

- 10 –

 
current and future formulations, dosages forms and strengths, and delivery modes, including any improvements thereto.  For clarity, Licensed
Products that contain the same Licensed Compound (whether or not with one or more active ingredients (if applicable)), but in a different
formulation, dosage form or delivery device, shall be considered the same Licensed Product for the purposes of calculating milestone and
royalty payments hereunder.

1.101

1.102

1.103

1.104

“Losses” has the meaning set forth in Section 11.1.

“MAA” has the meaning set forth in the definition of “Drug Approval Application.”

“Major Market” means each of [***].

“Major  Regulatory  Filing”  means  major  regulatory  filings  and  documents  (including  INDs,  Drug

Approval Applications, material labeling supplements, Regulatory Authority meeting requests, and core data sheets).

1.105

“Manufacture” and “Manufacturing” means all activities related to the synthesis, making, production,
processing,  purifying,  formulating,  filling,  finishing,  packaging,  labeling,  shipping,  and  holding  of  the  Licensed  Compound,  any  Licensed
Product, or any intermediate thereof, including process development, process qualification and validation, scale-up, pre-clinical, clinical and
commercial production and analytic development, product characterization, stability testing, quality assurance, and quality control.

1.106

1.107

1.108

“Manufacturing Process” has the meaning set forth in Section 4.6.1.

“Manufacturing Technology Transfer” has the meaning set forth in Section 4.6.1.

“Net Sales” means[***]

(a)

(b)

(c)

(d)

(e)

(f)

- 11 –

[***]

[***]

[***]

[***]

[***]

[***] of such Licensed Product and to the extent [***]

 
[***], where for purposes of this Net Sales definition, [***] of such Licensed Product;

(g)

(h)

(i)

(j)

[***]

[***]

[***]

[***], but which [***].

[***]

In the event that a Licensed Product is sold in any country or other jurisdiction [***]  

(i)

[***]. 

- 12 –

 
(ii)

(iii)

(iv)

[***]

[***]

[***].

1.109

1.110

1.111

“Non-Breaching Party” has the meaning set forth in Section 12.2.1.

[***]

“Opt-In Dataset” has the meaning set forth in the definition of “Opt-In Development Report.”

1.112

“Opt-In  Development  Report”  means  the  written  data  package  delivered  by  Harpoon  to  AbbVie  and
generated  from  the  clinical  dataset  extracted  from  the  [***]  as  it  exists  at  the  date  that  is  [***]  (the  “Opt-In Dataset”  and  such  date  the
“Opt-In Development Report Dataset Cutoff Date”).  The Opt-In Dataset will arise from the conduct of the Initial Development Activities
and will include information available in the [***] as of the Opt-In Development Report Generation Date related to [***].  In addition to the
information and data set forth above based on the Opt-In Dataset, the Opt-In Development Report will include[***].

- 13 –

 
“Opt-In Development Report.”

1.113

“Opt-In  Development  Report  Dataset  Cut-Off  Date”  has  the  meaning  set  forth  in  the  definition  of

“Other  Product”  means,  with  respect  to  a  Combination  Product,  such  other  therapeutically  active
pharmaceutical or biologic products referenced in Section 1.37(a) or such diagnostic or other product referenced in Section 1.37(b), in each
case other than the Licensed Compound.

1.114

1.115

1.116

“Owned Patents” has the meaning set forth in Section 10.2.3.

“Party” and “Parties” has the meaning set forth in the preamble hereto.

1.117

“Patents”  means  (a)  all  national,  regional  and  international  patents  and  patent  applications,  including
provisional  patent  applications,  (b)  all  patent  applications  filed  either  from  such  patents,  patent  applications  or  provisional  applications  or
from an application claiming priority from either of these, including divisionals, continuations, continuations-in-part, provisionals, converted
provisionals and continued prosecution applications, (c) any and all patents that have issued or in the future issue from the foregoing patent
applications ((a) and (b)), including utility models, petty patents and design patents and certificates of invention, (d) any and all extensions or
restorations  by  existing  or  future  extension  or  restoration  mechanisms,  including  revalidations,  reissues,  re-examinations  and  extensions
(including  any  pediatric  exclusivity  and  other  such  exclusivities  that  are  attached  to  patents,  supplementary  protection  certificates  and  the
like) of the foregoing patents or patent applications ((a), (b), and (c)), and (e) any similar rights, including so-called pipeline protection or any
importation,  revalidation,  confirmation  or  introduction  patent  or  registration  patent  or  patent  of  additions  to  any  of  such  foregoing  patent
applications and patents.

“Person”  means  an  individual,  sole  proprietorship,  partnership,  limited  partnership,  limited  liability
partnership,  corporation,  limited  liability  company,  business  trust,  joint  stock  company,  trust,  unincorporated  association,  joint  venture  or
other similar entity or organization, including a government or political subdivision, department or agency of a government.

1.118

1.119

“Phase  0”  means  an  exploratory,  first-in-human  trial  conducted  in  accordance  with  the  FDA  2006
Guidance  on  Exploratory  Investigational  New  Drug  Studies  (or  the  equivalent  in  any  country  or  other  jurisdiction  outside  of  the  United
States) and designed to expedite the development of therapeutic or imaging agents by establishing very early on whether the agent behaves in
human subjects as was anticipated from pre-clinical studies.

1.120

“Phase  I”  means  a  human  clinical  trial  of  a  Licensed  Compound  or  Licensed  Product,  the  principal
purpose of which is a preliminary determination of safety, tolerability, pharmacological activity or pharmacokinetics in healthy individuals or
patients  or  similar  clinical  study  prescribed  by  the  Regulatory  Authorities,  including  the  trials  referred  to  in  21  C.F.R.  §312.21(a),  as
amended.

- 14 –

 
“Phase  I/IB  Trial”  means  the  Phase  I  or  I/II  study  of  a  Licensed  Compound  or  Licensed  Product
incorporating dose escalation and cohort expansion studies as described in the Initial Development Plan (as it may be amended from time to
time in accordance with Section 3.1.1).

1.121

1.122

“Phase  II”  means  a  human  clinical  trial  of  a  Licensed  Compound  or  Licensed  Product,  the  principal
purpose  of  which  is  a  determination  of  safety  and  efficacy  in  the  target  patient  population,  which  is  prospectively  designed  to  generate
sufficient data that may permit commencement of pivotal clinical trials, or a similar clinical study prescribed by the Regulatory Authorities,
from time to time, pursuant to Applicable Law or otherwise, including the trials referred to in 21 C.F.R. §312.21(b), as amended.

1.123

“Phase III”  means  a  human  clinical  trial  of  a  Licensed  Compound  or  Licensed  Product  on  a  sufficient
number of subjects in an indicated patient population that is designed to establish that a Licensed Compound or Licensed Product is safe and
efficacious for its intended use and to determine the benefit/risk relationship, warnings, precautions, and adverse reactions that are associated
with such product in the dosage range to be prescribed, which trial is intended to support marketing approval of such Licensed Compound or
Licensed Product, including all tests and studies that are required by the FDA from time to time, pursuant to Applicable Law or otherwise,
including the trials referred to in 21 C.F.R. §312.21(c), as amended.

1.124

“PHSA” means the United States Public Health Service Act, as amended from time to time.

1.125
authority having substantially the same function.

“PMDA” means Japan’s Pharmaceuticals and Medical Devices Agency and any successor agency(ies) or

1.126

1.127

1.128

1.129

“Post CSR Option Period” has the meaning set forth in Section 12.6.3(e).

“Prior NDA” has the meaning set forth in Section 13.9.

“Product Information” has the meaning set forth in Section 9.1.

“Product Infringement” has the meaning set forth in Section 7.3.1.

1.130

“Product Labeling” means,  with  respect  to  a  Licensed  Product  in  a  country  or  other  jurisdiction  in  the
Territory, (a) the full prescribing information for such Licensed Product as approved by the Regulatory Authority for such country or other
jurisdiction,  including  any  required  patient  information,  and  (b)  all  labels  and  other  written,  printed,  or  graphic  matter  upon  a  container,
wrapper, or any package insert utilized with or for such Licensed Product in such country or other jurisdiction.

1.131

1.132

“Product-Specific Claims” has the meaning set forth in Section 7.2.1(a).

“Product-Specific Patents” has the meaning set forth in Section 7.2.1(b).

1.133

“Product  Trademarks”  means  the  Trademark(s)  to  be  used  by  AbbVie  or  its  Affiliates  or  its  or  their
respective Sublicensees for the Development, Commercialization or Exploitation of Licensed Products in the Territory and any registrations
thereof or any pending applications relating thereto in the Territory (excluding, in any event, any trademarks, service marks, names or logos
that include any corporate name or logo of the Parties or their Affiliates).  

1.134

1.135

“Proposed Future In-Licensed Rights” has the meaning set forth in Section 5.9.

“Regulatory  Approval”  means,  with  respect  to  a  country  or  other  jurisdiction  in  the  Territory,  all

approvals (including Drug Approval Applications), licenses, registrations, or authorizations of 

- 15 –

 
any  Regulatory  Authority  necessary  to  Commercialize  a  Licensed  Compound  or  Licensed  Product  in  such  country  or  other  jurisdiction,
including, where applicable, pricing or reimbursement approval in such country or other jurisdiction.

1.136

“Regulatory  Authority”  means  any  applicable  supra-national,  federal,  national,  regional,  state,
provincial, or local governmental or regulatory authority, agency, department, bureau, commission, council, or other entities (e.g., the FDA,
EMA  and  PMDA)  regulating  or  otherwise  exercising  authority  with  respect  to  activities  contemplated  in  this  Agreement,  including  the
Exploitation of the Licensed Compound or Licensed Products in the Territory.

1.137

“Regulatory  Documentation”  means  all  (a)  applications  (including  all  INDs  and  Drug  Approval
Applications  and  other  Major  Regulatory  Filings),  registrations,  licenses,  authorizations,  and  approvals  (including  Regulatory  Approvals),
(b) correspondence and reports submitted to or received from Regulatory Authorities (including minutes and official contact reports relating
to any communications with any Regulatory Authority) and all supporting documents with respect thereto, including all regulatory drug lists,
advertising and promotion documents, adverse event files, and complaint files, and (c) Clinical Data and data contained or relied upon in any
of the foregoing, in each case ((a), (b), and (c)) to the extent relating to a Licensed Compound or Licensed Product.

1.138

“Regulatory  Exclusivity”  means,  with  respect  to  any  country  or  other  jurisdiction  in  the  Territory,  an
additional  market  protection,  other  than  Patent  protection,  granted  by  a  Regulatory  Authority  in  such  country  or  other  jurisdiction  which
confers an exclusive Commercialization period during which AbbVie or its Affiliates or Sublicensees has the exclusive right to market and
sell, and any unauthorized Third Party is prevented from marketing or selling, a Licensed Compound or Licensed Product in such country or
other jurisdiction.

1.139

“Royalty Term” means, with respect to each Licensed Product and each country or other jurisdiction in
the Territory, the period beginning on the date of the First Commercial Sale of such Licensed Product in such country or other jurisdiction,
and ending on the latest to occur of (a) the expiration, invalidation or abandonment date of the last Harpoon Patent (i)[***] in such country or
other  jurisdiction;  or  (ii)  [***]  in  such  country  or  other  jurisdiction;  (b)  the  expiration  of  Regulatory  Exclusivity  in  such  country  or  other
jurisdiction  for  such  Licensed  Product;  or  (c)  the  [***]  of  the  First  Commercial  Sale  of  such  Licensed  Product  in  such  country  or  other
jurisdiction.  

1.140

“Segregate” means, with respect to a [***] relating to such [***] relating to the [***] provided that, [***]

in connection [***].

- 16 –

 
1.141

“Senior Officer” means, with respect to Harpoon, its [***], and with respect to AbbVie, its [***].  

“Sublicensee”  means  a  Person,  other  than  an  Affiliate  or  a  Distributor,  that  is  granted  a  sublicense  by
AbbVie  or  its  Affiliate  under  the  grants  in  Section 5.1  as  provided  in  Section 5.3  but  excluding  any  sublicense  granted  by  AbbVie  or  its
Affiliate as a result of settlement of patent litigation with respect to a Biosimilar Product.

1.142

1.143

“Term” has the meaning set forth in Section 12.1.1.

“Terminated Territory” means each Major Market with respect to which this Agreement is terminated by
Harpoon pursuant to Section 12.2.2, each country with respect to which this Agreement is terminated by AbbVie pursuant to Section 12.3, or
if this Agreement is terminated in its entirety, the entire Territory.

1.144

1.145

1.146

1.147

1.148

“Territory” means the entire world.

“Third Party” means any Person other than Harpoon, AbbVie and their respective Affiliates.

“Third Party Claims” has the meaning set forth in Section 11.1.

“Third Party Provider” has the meaning set forth in Section 3.7.

“Trademark” means  any  word,  name,  symbol,  color,  designation  or  device  or  any  combination  thereof
that functions as a source identifier, including any trademark, trade dress, brand mark, service mark, trade name, brand name, logo, business
symbol or domain name, whether or not registered.

1.149

(including the District of Columbia and Puerto Rico).

1.150

“United  States”  or  “U.S.”  means  the  United  States  of  America  and  its  territories  and  possessions

1.151

“Valid Claim” means (a) a claim of any [***] Patent whose validity, enforceability, or patentability has
not been rendered invalid by any of the following: (i) irretrievable lapse, abandonment, revocation, dedication to the public, or disclaimer; or
(ii) a holding, finding, or decision of invalidity, unenforceability, or non-patentability by a court, governmental agency, national or regional
patent office, or other appropriate body that has competent jurisdiction, such holding, finding, or decision being final and unappealable or
unappealed within the time allowed for appeal, or (b) a claim in a Patent application that is filed and prosecuted in good faith and no more
than  [***]  have  lapsed  from  its  earliest  priority  date.    For  clarity,  (A)  any  claim  in  a  Patent  application,  for  which  more  than  [***]  have
lapsed from its earliest priority date, shall not be considered a Valid Claim unless and until such claim is granted and meets the requirement
of  subclause  (a)  and  (B)  a  holding,  finding,  or  decision  being  final  and  unappealable  or  not  appealed  within  the  time  allowed  for
appeal  means a holding, finding, or decision from which no appeal (other than a petition to the United States Supreme Court for a writ of
certiorari or a similar appeal that is subject to discretionary review) can be or has been taken.

1.152

1.153

1.154

- 17 –

“Voting Stock” has the meaning set forth in the definition of “Change in Control.”

“Withholding Amount” has the meaning set forth in Section 6.8.1.

“Withholding Party” has the meaning set forth in Section 6.8.1.

 
1.155

“Working Group” has the meaning set forth in Section 2.6.

ARTICLE 2
COLLABORATION MANAGEMENT

2.1

Joint Governance Committee.

2.1.1

Formation.  Within [***] after the Effective Date, the Parties shall establish a joint governance
committee (the “Joint Governance Committee” or “JGC”).  The JGC shall consist of [***] representatives from each of the Parties, each
with the requisite experience and seniority to enable such person to make decisions on behalf of the Parties with respect to the issues falling
within the jurisdiction of the JGC.  From time to time, each Party may substitute [***] or more of its representatives to the JGC on written
notice to the other Party.  [***] shall select from its representatives the chairperson for the JGC.  From time to time, [***]

Specific  Responsibilities.    The  JGC  shall  develop  the  strategies  for  and  oversee  the
Development related activities relating to the Licensed Compounds and the Licensed Products in accordance with the Initial Development
Plan, and shall serve as a forum for the coordination of such activities.  In particular, the JGC shall:  

2.1.2

Plan;  

(a)

(b)

(c)

oversee  the  Development  activities  performed  pursuant  to  the  Initial  Development

address issues that arise during the performance of the Initial Development Plan, [***]

periodically  (no  less  often  than  [***])  review  and  serve  as  a  forum  for  discussing  the

Initial Development Plan, and review and approve amendments thereto;

arising out of the Initial Development Plan;

(d)

review  and  serve  as  a  forum  for  discussing  Information  (including  all  Clinical  Data)

activities and strategies for Licensed Compounds and Licensed Products;

(e)

(f)

discuss any [***]

prior  to  the  License  Option  Exercise  Closing  Date,  review  and  discuss  regulatory

established by the JGC, and resolve any disagreement between the designees of AbbVie and Harpoon on any Working Group;

(g)

(h)

discuss the scope of any [***] contemplated under Section 4.6.1;

review  the  activities  of  the  CMC  Working  Group  or  any  other  Working  Group

(i)

plan and oversee the conduct of activities set forth in Section 3.5;

- 18 –

 
Confidential Information; and

(j)

(k)

(l)

discuss and agree upon the [***] named AbbVie personnel;

establish  secure  access  methods  (such  as  secure  databases)  for  each  Party  to  access

perform such other functions as are set forth herein or as the Parties may mutually agree

in writing, except where in conflict with any provision of this Agreement.

2.2

General Provisions Applicable to the JGC.

2.2.1

Meetings  and  Minutes.   The  JGC  shall  meet  [***],  or  as  otherwise  agreed  to  by  the  Parties,
with the location of such meetings alternating between locations designated by Harpoon and locations designated by AbbVie.  The Alliance
Managers shall be permitted to attend any such JGC meetings.  The chairperson of the JGC shall be responsible for calling meetings on [***]
notice.    Each  Party  shall  make  all  proposals  for  agenda  items  and  shall  provide  all  appropriate  information  with  respect  to  such  proposed
items at least [***] in advance of the applicable meeting; provided that under exigent circumstances requiring input by the JGC, a Party may
provide  its  agenda  items  to  the  other  Party  within  a  shorter  period  of  time  in  advance  of  the  meeting,  or  may  propose  that  there  not  be  a
specific agenda for a particular meeting, so long as the other Party consents to such later addition of such agenda items or the absence of a
specific agenda for such meeting.  The chairperson of the JGC shall prepare and circulate for review and approval of the Parties minutes of
each meeting within [***] after the meeting.  The Parties shall agree on the minutes of each meeting promptly, but in no event later than the
next meeting of the JGC.  

2.2.2

Procedural  Rules.    The  JGC  shall  have  the  right  to  adopt  such  standing  rules  as  shall  be
necessary for its work, to the extent that such rules are not inconsistent with this Agreement.  A quorum of the JGC shall exist whenever there
is  present  at  a  meeting  [***]  appointed  by  each  Party,  each  with  the  requisite  experience  and  seniority  to  enable  such  person  to  make
decisions  on  behalf  of  the  Party  it  represents  with  respect  to  the  issues  falling  within  the  jurisdiction  of  the  JGC.    Representatives  of  the
Parties on the JGC may attend a meeting either in person or by telephone, video conference or similar means in which each participant can
hear  what  is  said  by,  and  be  heard  by,  the  other  participants.    Representation  by  proxy  shall  be  allowed.    The  JGC  shall  take  action  by
consensus  of  the  representatives  present  at  a  meeting  at  which  a  quorum  exists,  with  each  Party  having  a  single  vote  irrespective  of  the
number of representatives of such Party in attendance, or by a written resolution signed by [***] appointed by each Party.  Employees or
consultants of either Party that are not representatives of the Parties on the JGC may attend meetings of the JGC; provided that such attendees
(i) shall not vote or otherwise participate in the decision-making process of the JGC, and (ii) are bound by obligations of confidentiality and
non-disclosure equivalent to those set forth in Article 9.

Dispute  Resolution.    If  the  JGC  cannot,  or  does  not,  reach  consensus  on  an  issue,  then  the
dispute shall first be referred to the Senior Officers of the Parties, who shall confer in good faith on the resolution of the issue.  Any final
decision mutually agreed to by the Senior Officers shall be conclusive and binding on the Parties.  If the Senior Officers are not able to agree
on the resolution of any such issue within [***] after such issue was first referred to them, then:

2.2.3

finally and definitively resolve such dispute [***] provided that [***]

(a)

prior to the License Option Exercise Closing Date, the Senior Officer of Harpoon will

- 19 –

 
[***] or (ii) [***] and

[***]  Notwithstanding the foregoing, AbbVie may not, following the License Option
Exercise Closing Date, use its final decision right to amend the Initial Development Plan in any way that would require Harpoon to perform
additional activities than was required under the Initial Development Plan immediately prior to the License Option Exercise Closing Date,
unless Harpoon agrees to perform such additional activities and AbbVie solely bears any additional expense.  

(b)

As used herein, a “Material Amendment” to the Initial Development Plan shall mean an amendment to the Initial Development Plan that
would [***].

2.2.4

Limitations on Authority.  Each Party shall retain the rights, powers, and discretion granted to
it under this Agreement and no such rights, powers, or discretion shall be delegated to or vested in the JGC unless such delegation or vesting
of rights is expressly provided for in this Agreement or the Parties expressly so agree in writing.  The JGC shall not have the power to amend,
modify, or waive compliance with this Agreement, which may only be amended or modified as provided in Section 13.9 or compliance with
which may only be waived as provided in Section 13.12.

2.2.5

Alliance Manager.  Each Party shall appoint a person(s) who shall oversee contact between the
Parties for all matters between meetings of the JGC, and shall have such other responsibilities as the Parties may agree in writing after the
Effective Date (each, an “Alliance Manager”).  Following the disbandment of the JGC after the License Option Exercise Closing Date, the
Alliance Managers shall continue to act as a liaison between the Parties and shall be responsible for exchanging Information provided for
under  the  terms  of  this  Agreement.    Each  Party  may  replace  its  Alliance  Manager  at  any  time  by  notice  in  writing  to  the  other
Party.  Following the License Option Exercise Closing Date and until the First Commercial Sale of a Licensed Product in a Major Market,
Alliance Managers shall meet [***], or as otherwise agreed to by the Parties.

2.3

Discontinuation  of  the  JGC.    The  JGC  shall  continue  to  exist  until  the  first  to  occur  of:  (a)  the  Parties
mutually  agreeing  to  disband  the  JGC;  (b)  in  the  event  of  AbbVie’s  exercise  of  its  License  Option,  upon  the  delivery  of  the  Final
Development  Report  pursuant  to  Section  3.1.3;  and  (c)  expiration  of  the  License  Option  Period  without  AbbVie  exercising  the  License
Option.  Additionally, in the event of a Change in Control of Harpoon involving a Competitor, AbbVie shall have the right at any time and for
any  reason,  effective  upon  written  notice,  to  disband  the  JGC  in  accordance  with  Section 13.2.2.    In  the  event  that  the  JGC  is  disbanded
pursuant to Section 13.2.2, (a) any information, documents or reports that a Party is otherwise required to provide to the JGC pursuant to this
Agreement shall be provided directly to the other Party and (b) any matters delegated to the JGC shall be made by mutual agreement of the
Parties, subject to the dispute resolution provisions of Section 2.2.3.

internal structure (including various committees, teams and review boards) that will

2.4

Interactions Between the JGC and Internal Teams.  The Parties recognize that each Party possesses an

- 20 –

 
be  involved  in  administering  such  Party’s  activities  under  this  Agreement.    Nothing  contained  in  this  Article  shall  prevent  a  Party  from
making routine day-to-day decisions relating to the conduct of those activities for which it has a performance or other obligations hereunder,
in each case in a manner consistent with the then-current Initial Development Plan and the terms and conditions of this Agreement.

2.5

CMC Working Group.  Within [***] after the Effective Date, the Parties shall establish a CMC working
group (the “CMC Working Group”).  The CMC Working Group shall consist of two (2) representatives from each of the Parties, each with
the requisite experience and seniority to enable such person to make decisions on behalf of the Parties with respect to the issues falling within
the jurisdiction of the CMC Working Group.  From time to time, each Party may substitute one (1) or more of its representatives to the CMC
Working Group on written notice to the other Party.  In particular, the CMC Working Group shall:  

thereto; and  

(a)

(b)

review  and  approve  [***]  with  respect  thereto,  and  review  and  approve  amendments

perform such other functions as are set forth herein or as the Parties may mutually agree

in writing, except where in conflict with any provision of this Agreement.

2.6

Working Groups.  In addition to the CMC Working Group, from time to time, the JGC may establish and
delegate duties to sub-committees or directed teams (each, a “Working Group”) on an “as-needed” basis to oversee particular projects or
activities (for example, joint project team, joint finance group, and/or joint intellectual property group).  Each such Working Group shall be
constituted  and  shall  operate  as  the  JGC  determines;  provided  that  each  Working  Group  shall  have  equal  representation  from  each  Party,
unless otherwise mutually agreed.  Working Groups may be established on an ad hoc basis for purposes of a specific project or on such other
basis as the JGC may determine.  Each Working Group and its activities shall be subject to the oversight, review and approval of, and shall
report  to,  the  JGC.    In  no  event  shall  the  authority  of  the  Working  Group  exceed  that  specified  for  the  JGC.   All  decisions  of  a  Working
Group shall be by consensus.  Any disagreement between the designees of AbbVie and Harpoon on a Working Group shall be referred to the
JGC for resolution.

other representatives to attend meetings of, and otherwise participate on, the JGC or any Working Group.

2.7

Expenses.  Each Party shall be responsible for all travel and related costs and expenses for its members and

ARTICLE 3
DEVELOPMENT AND REGULATORY

3.1

Initial Development Plan and Activities.

3.1.1

Initial Development Plan.  Either Party, directly or through its representatives on the JGC, may
propose amendments to the Initial Development Plan from time to time as appropriate, including in light of changed circumstances.  Any and
all such amendments shall be subject to approval by the JGC as set forth in Section 2.1.2, subject to the dispute resolution procedures set
forth in Section 2.2.3.  Within [***] of the Effective Date, the Parties, through the CMC Working Group, shall jointly develop an amendment
to the Initial Development Plan to identify the [***] in accordance with the parameters set forth in the Initial Development Plan attached
hereto as Schedule 1.84.  For clarity, all [***]. 

- 21 –

 
3.1.2

Initial  Development  Activities.    Harpoon  shall  perform  the  activities  set  forth  in  the  Initial
Development Plan in accordance with the timelines set forth therein, [***].  In the conduct of the Initial Development Activities, Harpoon
shall  use  commercially  reasonable  efforts  to  ensure  that  clinical  sites  participating  in  the  Phase  I/IB  Trial  timely  submit  Clinical  Data
generated at such site into the clinical database.  If at any time AbbVie has a reasonable basis to believe that Harpoon is in material breach of
its  obligation  to  perform  any  Initial  Development  Activities,  then  AbbVie  may  so  notify  Harpoon  in  writing,  specifying  the  basis  for  its
belief,  and  the  Parties  shall  meet  within  [***]  after  such  notice  to  discuss  in  good  faith  AbbVie’s  concerns.    If  Harpoon
[***]  Notwithstanding the foregoing, if Harpoon [***], then Harpoon may seek resolution on the existence of such material breach pursuant
to  Section  13.7;  provided  that  (i)  Harpoon’s  [***].    For  clarity,  if  the  arbitrator  determines  that  notwithstanding  [***].    The  Parties
acknowledge and agree that in the event AbbVie [***] Initial Development Activities in accordance with the Initial Development Plan.  If
AbbVie so elects to [***] permitted under the terms and conditions of the applicable agreement, Harpoon shall [***].  

connection with amendments to the Initial Development Plan pursuant to Section 2.1.2(c) and Section 2.2.3, [***] 

3.1.3

Certain Amendments to Initial Development Plan.  Notwithstanding the role of the JGC in

- 22 –

 
Alliance Manager).  AbbVie shall have [***] in which to consider the proposed amendments and respond to Harpoon, following which:

 if AbbVie notifies Harpoon in writing that it consents to the amendments proposed by
Harpoon to the Initial Development Plan, Harpoon may proceed to resubmit the clinical portion of the Initial Development Plan (including
the clinical protocol for the Phase I/IB Trial, as applicable) to the FDA, [***];

(a)

if  AbbVie  requests  that  Harpoon  provide  further  information  in  connection  with  the
proposed  amendments,  Harpoon  shall  [***]  provide  such  information  and  make  available  appropriate  personnel  to  respond  to  AbbVie’s
questions  regarding  the  proposed  amendments,  and  if  AbbVie  notifies  Harpoon  in  writing  following  receipt  of  such  information  that  it
consents to the amendments as proposed by Harpoon to the Initial Development Plan, [***];

(b)

if AbbVie notifies Harpoon that it does not consent to the proposed amendments (either
before  or  following  a  request  for  more  information  under  Section 3.1.3(b)),  then  such  amendment  (i)  shall  be  [***],  (ii)  shall  be  referred
[***] to a special meeting of the JGC (or such other discussion forum as the Parties may mutually agree in writing) and (iii) shall be subject
[***], provided that solely with respect to amendment arising under this Section 3.1.3, (A) [***], and (B) [***]; and

(c)

(d)
the foregoing three [***] period, then [***].  

For clarity, if AbbVie provides no response to Harpoon’s proposed amendments within

By way of example only, if Harpoon provides AbbVie with a proposed amended Initial Development Plan on [***] respectively.  

3.1.4

Final  Development  Report.    Following  AbbVie’s  exercise  of  the  License  Option,  and  within
[***] after the [***], Harpoon shall provide AbbVie with the Final Development Report.  AbbVie shall have the opportunity to review and
inspect  the  Final  Development  Report  and  to  reasonably  ask  questions  of  Harpoon  and  receive  timely  answers  from  Harpoon  related
thereto.  Following AbbVie’s receipt of the Final Development Report, AbbVie shall have [***] to provide notice to Harpoon identifying any
Information set forth in Section 1.64, which 

- 23 –

 
AbbVie believes in good faith is not included in the Final Development Report.  Harpoon shall provide AbbVie such Information [***].

3.2

AbbVie Option.  

3.2.1

Opt-In Development Report.  Within [***] following the [***], Harpoon shall provide AbbVie
with  the  Opt-In  Development  Report.   AbbVie  shall  have  the  opportunity  to  review  and  inspect  the  Opt-In  Development  Report  and  to
reasonably ask questions of Harpoon (provided that such questions are received by Harpoon prior to [***]) and receive timely answers from
Harpoon related thereto until the expiration of the Harpoon Option Period.  If, prior to the Development Report Review Deadline, AbbVie
provides  written  notice  to  Harpoon  reasonably  requesting  supplemental  data  or  Information  that  is  in  Harpoon’s  possession  or  reasonably
available  to  Harpoon  (and  that,  in  each  case,  can  be  provided  without  performing  any  additional  research,  studies  or  material  scientific
analysis, or generating any additional data) and is reasonably necessary for AbbVie to assess the Opt-In Development Report and make an
informed decision about the exercise of the License Option (such notice to provide reasonable detail regarding the basis for such request),
then Harpoon shall provide to AbbVie such requested supplemental data or Information within [***] of its receipt of such notice (or such
longer period as the Parties may mutually agree is necessary to obtain and provide such supplemental data or Information) and the License
Option Period shall be extended to [***] following the date of delivery of such supplemental data or Information, provided that in no event
will the License Option Period be extended as a result of such request and additional information and data to more than [***] following the
date Harpoon first provides the Opt-In Development Report to AbbVie under this Section 3.2.1.

3.2.2

[***].  AbbVie may, but shall not be obligated to, deliver to Harpoon a written notice requesting
an  [***]  at  any  time  on  or  after  the  [***];  provided  that  [***]  within  any  [***]  period  prior  to  the  date  of  AbbVie’s  receipt  of  the  Opt-In
Development Report, unless any additional request for [***] is approved by the JGC, with Harpoon’s consent not to be unreasonably withheld,
conditioned  or  delayed.    Upon  Harpoon’s  receipt  of  any  such  notice,  Harpoon  shall  promptly,  but  in  any  event  within  [***]  of  Harpoon’s
receipt of any such notice, [***].  AbbVie shall [***].  If, prior to the Development Report Review Deadline, AbbVie provides written notice
to Harpoon reasonably requesting supplemental data or Information that is in Harpoon’s possession or reasonably available to Harpoon (and
that,  in  each  case,  can  be  provided  without  performing  any  additional  research,  studies  or  material  scientific  analysis,  or  generating  any
additional data) and is reasonably necessary for AbbVie to make [***]  (such notice to provide reasonable detail regarding the basis for such
request), then Harpoon shall provide to AbbVie such requested supplemental data or Information within [***] of its receipt of such notice (or
such longer period as the Parties may mutually agree is necessary to obtain and provide such supplemental data or Information).  For purposes
of clarity, [***] Opt-In Development Report and shall not trigger the [***] period set forth in Section 3.2.3 with respect to the License Option
Period, unless [***] shall trigger the [***] period set forth in Section 3.2.3.  If AbbVie [***].  

- 24 –

 
3.2.3

License Option Exercise Notice. Upon  the  Effective  Date,  Harpoon  hereby  grants  to  AbbVie
the exclusive right, but not the obligation, to obtain the licenses set forth in Section 5.1.3 (the “License Option”).    AbbVie shall have the
right to exercise its License Option by providing written notice of such election to Harpoon (“License Option Exercise Notice”) at any time
on or after the Effective Date and on or prior to the date that is [***] from AbbVie’s receipt of the Opt-In Development Report containing all
items  required  pursuant  to  Section  1.112,  as  such  period  may  be  extended  pursuant  to  Section  3.2.1  (the  “License  Option  Period”).    If
AbbVie  does  not  provide  a  License  Option  Exercise  Notice  within  the  License  Option  Period,  then  (a)  Harpoon  shall  have  no  further
obligations to perform any Initial Development Activities, (b) AbbVie’s License Option shall expire, and this Agreement shall terminate in
accordance  with  Section  12.1.1,  and  (c)  AbbVie  shall  have  no  further  rights  in  connection  with  Licensed  Compounds  of  the  Licensed
Products.

3.2.4

Exercise of the License Option.  

AbbVie shall be deemed to have entered into the licenses set forth in Section 5.1.3  on
the later of (i) Harpoon’s receipt of the License Option Exercise Notice, or (ii) the expiration or earlier termination of any waiting period (or
any  extension  thereof)  under  the  HSR  Act  in  the  U.S.  (the  date  of  such  receipt  by  Harpoon  or  the  date  of  any  such  expiration  or  earlier
termination, as applicable, the “License Option Exercise Closing Date”).

(a)

(b)

If  AbbVie  provides  the  License  Option  Exercise  Notice  during  the  License  Option
Period, upon AbbVie’s request, the Parties shall work together in good faith to conduct an analysis of whether any filings or notifications are
or may be required to be filed under the HSR Act (the “HSR Filing”) or any similar applicable foreign law or regulation in connection with
AbbVie’s exercise of the License Option.  The Parties shall each, as soon as practicable after the date of Harpoon’s receipt of the License
Option  Exercise  Notice,  file  or  cause  to  be  filed  with  the  U.S.  Federal  Trade  Commission  and  the  U.S.  Department  of  Justice  and  any
relevant  foreign  governmental  authority  any  such  notifications.    The  Parties  shall  use  their  commercially  reasonable  efforts  to  respond
promptly  to  any  requests  for  additional  information  made  by  such  agencies.    For  the  purposes  of  this  Section 3.2.4(b),  the  commercially
reasonable  efforts  of  AbbVie  shall  not  require  AbbVie  to  agree  to  any  condition,  prohibition,  limitation  or  the  like  proposed  by  the  U.S.
Federal  Trade  Commission  or  other  government  authority  to  dispose  of  or  hold  separate  any  material  portion  of  the  business  or  assets  of
AbbVie or its Affiliates.  The Parties shall equally share the filing fees in conducting the HSR Filing, and each Party is responsible for the
costs and expenses of its own legal and other advice in preparing and conducting the HSR Filing.  

[***]  At any time following the earlier of [***].  For clarity, if AbbVie’s [***] shall be solely responsible
for any cost or expense associated with such additional obligations, and for providing [***] to enable [***] in connection with the Licensed
Compounds and Licensed Products prior to AbbVie’s exercise of the License Option.  AbbVie may elect to exercise its option to carry

3.3

- 25 –

 
out [***]and prior to the expiration of the License Option Period.  

 Upon  the  date  AbbVie  provides  the  [***],  AbbVie  shall  be  deemed  to  have  entered  into  the
license set forth in Section 5.1.2.  AbbVie shall have the right, on a one-time only basis following[***].  AbbVie shall have final decision
making authority with respect to all [***].  

3.3.2

If  AbbVie  [***]  and  does  not  subsequently  exercise  the  License  Option,  then  AbbVie  shall
[***].  For clarity, (A) the foregoing license shall exclude [***], and notwithstanding anything in this Agreement to the contrary, except as
necessary for Harpoon to exercise its rights under the foregoing subclause (a) or as required by the foregoing subclause (c), [***], and (B) the
requirement under the foregoing subclause (c) shall [***] following the termination of this Agreement.  

3.3.1

3.4

Post-Exercise  Development  Activities.    Following  the  License  Option  Exercise  Closing  Date,  except  for
Harpoon’s responsibilities in completing the Initial Development Activities and delivering the Final Development Report, AbbVie shall have
the sole right to Develop and Manufacture (and shall control all aspects of Development and Manufacturing), including seeking Regulatory
Approvals for, Licensed Compounds and Licensed Products in the Field and in the Territory and, for clarity, Harpoon and its Affiliates shall
have no right to do so.  Following the License Option Exercise Closing Date, AbbVie shall use Commercially Reasonable Efforts to Develop
and obtain Regulatory Approval for [***] Licensed Product for [***] for use in [***] Major Market.  AbbVie shall have the right to satisfy its
diligence obligations under this Section 3.4 through its Affiliates or Sublicensees.  Except as set forth in this Section 3.4, AbbVie shall have
no other diligence obligations, express or implied, with respect to the Development of the Licensed Compounds or Licensed Products in the
Territory.  Following the License Option Exercise Closing Date and until the First Commercial Sale of a Licensed Product in a Major Market,
AbbVie  will  provide  to  Harpoon  following  disbandment  of  the  JGC,  [***]  reports  within  [***]  after  the  end  of  each  [***],  in  each  case
summarizing  the  key  Development  activities  undertaken  and  summarizing  the  results  achieved  with  respect  to  the  applicable  Licensed
Compounds and Licensed Products in all Major Markets during such [***].  Prior to the disbandment of the JGC, AbbVie shall provide the
JGC

- 26 –

 
with  interim  updates  on  such  activities  and  results  at  its  regularly  scheduled  meetings.    For  clarity,  if  AbbVie  [***], [***]  and  the  Final
Development  Report),  but  AbbVie  shall  have  final  decision  making  authority  with  respect  to  the  conduct  of  such  Initial  Development
Activities; provided that in no event may AbbVie require Harpoon to conduct any Initial Development Activities, or to incur any costs or
expenses in association with performing such Initial Development Activities following the License Option Exercise Closing Date, in excess
of  the  activities  set  forth  in  the  Initial  Development  Plan  in  existence  immediately  prior  to  the  License  Option  Exercise  Closing
Date.  AbbVie shall have the right, at AbbVie’s sole election, to assume and complete some or all of such Initial Development Activities at
AbbVie’s sole cost and expense, and such step in following the License Option Exercise Closing Date shall not [***].  

3.5

Supply of Technology for Development Purposes.

3.5.1

Immediately after the License Option Exercise Closing Date, Harpoon shall, and shall cause its
Affiliates  to,  without  additional  compensation,  disclose  and  make  available  to  AbbVie  (which  obligation  may  be  satisfied  by  granting
personnel designated by AbbVie controlled access to an electronic data room), in such form as maintained by Harpoon in the ordinary course
of  business,  Regulatory  Documentation,  Harpoon  Know-How,  Joint  Know-How,  and  any  other  Information  claimed  or  covered  by  any
Harpoon  Patent  or  Joint  Patent  to  the  extent  necessary  or  reasonably  useful  for  AbbVie’s  Exploitation  of  the  Licensed  Compound  and
thereafter until the completion of the Initial Development Activities, promptly after the earlier of the development, making, conception, or
reduction to practice of such Regulatory Documentation, Harpoon Know-How, Joint Know-How, or other Information.  

3.5.2

Immediately  after  the  License  Option  Exercise  Closing  Date,  [***],  and  (b)  Harpoon  shall
provide AbbVie with all reasonable assistance required in order to transfer to AbbVie the Regulatory Documentation, Harpoon Know-How,
Joint Know-How, and other Information required to be produced pursuant to Section 3.5.1 above, in each case in a timely manner, and shall
reasonably assist AbbVie with respect to the Exploitation of any Licensed Compound and any Licensed Products, in each case subject to the
limitations  set  forth  in  this  Section 3.5.2.   At  AbbVie's  request,  Harpoon  shall  execute  a  bill  of  sale  conveying  such  inventory.    Without
prejudice to the generality of the foregoing, if visits of Harpoon’s representatives to AbbVie’s facilities are reasonably requested by AbbVie
for purposes of transferring the Regulatory Documentation, Harpoon Know-How, Joint Know-How, or other Information to AbbVie or for
purposes  of  providing  AbbVie  the  assistance  referenced  in  the  preceding  sentence,  Harpoon  shall  send  appropriate  representatives  to
AbbVie’s facilities.  Harpoon shall provide up to [***] and AbbVie shall [***] as mutually agreed by the Parties in writing.

3.6

Expenses and Invoicing.  Except as expressly set forth in this Agreement, each Party shall bear all costs and
expenses associated with the Development activities for which such Party is responsible under this Agreement and the Initial Development
Plan; provided that (a) [***], Harpoon’s obligation to bear out of pocket costs shall be limited to [***] (the “[***]”) and AbbVie shall bear any
out of pocket costs in

- 27 –

 
[***],  and  (b)  [***]  AbbVie  has  the  right  to  assume  following  determination  of  Harpoon  material  breach  pursuant  to  Section  3.1.2.   To  the
extent  that  the  costs  of  [***],  Harpoon  shall  provide  notice  to  the  CMC  Working  Group.    [***].    To  the  extent  consistent  with  Harpoon’s
obligations under this Section 3.6, [***]  If AbbVie assumes any Initial Development Activities in accordance with Section 3.1.2, then AbbVie
shall invoice Harpoon each [***] for all reasonable direct internal (i.e. direct personnel costs) and documented, out-of-pocket costs associated
with conducting such Initial Development Activities [***], and, Harpoon shall pay such invoices within [***] of receipt thereof.  

Subcontracting.  

Each Party shall have the right to subcontract any of its Development activities to a Third Party (a “Third Party Provider”); provided that,
solely with respect of Third Party Providers performing services that are critical or material to the Licensed Compound or Licensed Products
(such as contract research organizations and contract manufacturing organizations,) Harpoon must (a) [***] (b) except with respect to Third
Party Providers [***] and (c) obtain a written undertaking from the Third Party Provider sufficient for Harpoon to comply with the applicable
terms and conditions of this Agreement, including the confidentiality provisions of Article 9.

3.8

Regulatory Matters.

following shall apply:

3.8.1

Pre-Exercise Regulatory Activities.  Prior to the License Option Exercise Closing Date, the

Harpoon shall have the sole right and responsibility to prepare, obtain and maintain all
INDs  necessary  to  perform  its  obligations  under  the  Initial  Development  Plan,  and  to  conduct  communications  with  the  applicable
Regulatory Authorities with respect to such INDs[***] submission to the applicable Regulatory Authorities.  Harpoon shall provide [***].

(a)

Subject  to  the  immediately  following  sentence,  Harpoon  shall  provide  AbbVie  with
(i)  access  to  or  copies  of  all  material  written  or  electronic  correspondence  (other  than  regulatory  filings)  relating  to  the  Development  of
Licensed  Compounds  or  Licensed  Products  received  by  Harpoon  or  its  Affiliates  from,  or  forwarded  by  Harpoon  or  its  Affiliates  to,  the
Regulatory Authorities in the Territory, and (ii) if available, copies of meeting minutes and summaries of material meetings, conferences, and
discussions held by Harpoon or its Affiliates with the Regulatory Authorities in the Territory, in each case

(b)

- 28 –

 
((i)  and  (ii))  [***]  of  its  receipt,  forwarding  or  production  of  the  foregoing,  as  applicable.    If  such  written  or  electronic  correspondence
received from any such Regulatory Authority relates to the withdrawal, suspension, or revocation of a Regulatory Approval for a Licensed
Product,  the  prohibition  or  suspension  of  the  supply  of  a  Licensed  Compound  or  Licensed  Product,  or  the  initiation  of  any  investigation,
review, or inquiry by such Regulatory Authority concerning the safety of a Licensed Compound or Licensed Product, Harpoon shall notify
AbbVie and provide AbbVie with copies of such written or electronic correspondence [***] after receipt of such correspondence.

Harpoon  shall  provide  AbbVie  with  prior  written  notice,  to  the  extent  Harpoon  has
advance knowledge, of any scheduled material meeting, conference, or discussion with a Regulatory Authority in the Territory relating to a
Licensed  Product,  [***]  after  Harpoon  or  its  Affiliates  first  receive  notice  of  the  scheduling  of  such  material  meeting,  conference,  or
discussion  (or  within  such  shorter  period    as  may  be  necessary  in  order  to  give  AbbVie  a  reasonable  opportunity  to  attend  such  material
meeting, conference, or discussion).  [***]

(c)

(d)

For  clarity,  all  Information  provided  by  Harpoon  to  AbbVie  under  this  Section  3.8.1

shall be the Confidential Information of Harpoon.

3.8.2

Post-Exercise Regulatory Activities.  Effective on the License Option Exercise Closing Date,

the following shall apply:

Promptly after the License Option Exercise Closing Date and upon a mutually agreed
upon date, but in any event no later than [***] after the License Option Exercise Closing Date, Harpoon shall transition to AbbVie all INDs
for Licensed Compounds and Licensed Products.

(a)

(b)

As between the Parties, AbbVie, at its sole expense, shall have the sole right to prepare,
obtain,  and  maintain  the  Drug  Approval  Applications  (including  the  setting  of  the  overall  regulatory  strategy  therefor),  other  Regulatory
Approvals and other regulatory submissions, and to conduct communications with the Regulatory Authorities, for Licensed Compounds or
Licensed  Products  in  the  Territory  (which  shall  include  filings  of  or  with  respect  to  INDs  and  other  filings  or  communications  with  the
Regulatory  Authorities).    Harpoon  shall  support  AbbVie,  as  may  be  reasonably  necessary,  in  obtaining  Regulatory  Approvals  for  the
Licensed  Products,  and  in  the  activities  in  support  thereof,  including  providing  necessary  documents  or  other  materials  required  by
Applicable Law to obtain Regulatory Approvals, in each case in accordance with the terms and conditions of this Agreement and the Initial
Development Plan.

(c)

All  Regulatory  Documentation  (including  all  Regulatory  Approvals  and  Product
Labeling) specifically relating to the Licensed Compounds or Licensed Products with respect to the Territory shall be owned by, and shall be
the  sole  property  and  held  in  the  name  of,  AbbVie  or  its  designated  Affiliate,  Sublicensee  or  designee.    Harpoon  shall  duly  execute  and
deliver, or cause to be duly executed and delivered, such instruments and shall do and cause to be done such acts and things, including the
filing  of  such  assignments,  agreements,  documents,  and  instruments,  as  may  be  necessary  under,  or  as  AbbVie  may  reasonably  request  in
connection with, or to carry out more effectively the purpose of, or to better assure and confirm unto AbbVie its rights under, this Section.

3.8.3

Recalls.   AbbVie  shall  make  every  reasonable  effort  to  notify  Harpoon  promptly  (and  in  any
event no later than [***]) following its determination that any event, incident, or circumstance has occurred that may result in the need for a
recall, market suspension, or market withdrawal of a Licensed Product in the Territory, and shall include in such notice the reasoning behind
such determination, and any supporting facts.  AbbVie (or its Sublicensee) shall have the right to make the final determination whether to
voluntarily implement any such recall, market suspension, or market withdrawal in the Territory.  If a recall, market suspension, or market
withdrawal is mandated by a Regulatory Authority in

- 29 –

 
the Territory, AbbVie (or its Sublicensee) shall initiate such a recall, market suspension, or market withdrawal in compliance with Applicable
Law.  For all recalls, market suspensions or market withdrawals undertaken pursuant to this Section 3.8.3, AbbVie (or its Sublicensee) shall
be solely responsible for the execution thereof, and Harpoon shall reasonably cooperate in all such recall efforts, at AbbVie’s expense.

Development activities, including Initial Development Activities, in good scientific manner and in compliance with all Applicable Law.

3.8.4

Compliance.    Each  Party  shall  perform  or  cause  to  be  performed,  any  and  all  of  its

3.8.5

Records.    Each  of  Harpoon  and  AbbVie  shall,  and  shall  use  their  commercially  reasonable
efforts to ensure that its Third Party Providers shall, maintain records in sufficient detail and in good scientific manner appropriate for patent
and regulatory purposes, and in compliance with Applicable Law, which shall be complete and accurate and shall properly reflect all work
done  and  results  achieved  in  the  performance  of  its  Development  activities  which,  following  the  Effective  Date,  shall  record  only  such
activities and shall, to the extent reasonably practicable, not include or be commingled with records of activities outside the scope of this
Agreement.    Such  records  shall  be  retained  by  Harpoon  or  AbbVie,  as  the  case  may  be,  for  [***],  or  for  such  longer  period  as  may  be
required by Applicable Law.  Following the License Option Exercise Closing Date, upon AbbVie’s request, Harpoon shall provide to AbbVie
copies  of  the  records  it  has  maintained  pursuant  to  this  Section  3.8.5  which  have  not  been  provided  or  otherwise  transferred  to  AbbVie
pursuant to Section 3.5.  AbbVie shall maintain such records and the information disclosed therein in confidence in accordance with Article
9.

3.8.6

Following the License Option Exercise Closing Date, if AbbVie reasonably considers that it has
not  been  provided  with  all  Information  required  to  be  provided  under  Section  3.5,  or  in  connection  with  any  request  by  a  Regulatory
Authority  or  required  under  Applicable  Law,  AbbVie  shall  have  the  right,  [***],  to  inspect  and  copy  all  records  of  Harpoon  maintained
pursuant to Section 3.8.5.  Prior to the License Option Exercise Closing Date, AbbVie shall not have such right to inspect or copy Harpoon’s
records, except to the extent required by Applicable Laws, or as reasonably necessary to comply with a request by a Regulatory Authority.
AbbVie shall maintain such records and the information disclosed therein in confidence in accordance with Article 9.

ARTICLE 4
COMMERCIALIZATION

In General.  Effective on the License Option Exercise Closing Date, AbbVie (itself or through its Affiliates
or Sublicensees) shall have the sole right to Commercialize Licensed Compounds and Licensed Products in the Territory at its own cost and
expense.

4.1

Commercialization  Diligence.    Following  the  License  Option  Exercise  Closing  Date,  AbbVie  shall  use
Commercially  Reasonable  Efforts  to  Commercialize  [***]  Licensed  Product  in  [***]  Major  Market  following  receipt  of  Regulatory
Approval therefor in such Major Market; provided that [***]; provided further that, for purposes of clarity, [***].

4.2

- 30 –

 
[***]  If at any time Harpoon has a reasonable basis to believe that AbbVie is in material breach of its obligations under this Section 4.2, then
Harpoon may so notify AbbVie, specifying the basis for its belief, and the Parties shall meet within [***] after such notice to discuss in good
faith Harpoon’s concerns.

4.3

Booking of Sales; Distribution.  Effective on the License Option Exercise Closing Date, AbbVie shall have
the  sole  right  to  invoice  and  book  sales,  establish  all  terms  of  sale  (including  pricing  and  discounts)  and  warehousing,  and  distribute  the
Licensed Products in the Territory and to perform or cause to be performed all related services.  AbbVie shall handle all returns, recalls, or
withdrawals,  order  processing,  invoicing,  collection,  distribution,  and  inventory  management  with  respect  to  the  Licensed  Products  in  the
Territory.

4.4

Product Trademarks.  Effective on the License Option Exercise Closing Date, AbbVie shall have the sole
right  to  determine  and  own  the  Product  Trademarks  to  be  used  with  respect  to  the  Exploitation  of  the  Licensed  Products  on  a  worldwide
basis.    Harpoon  shall  not,  and  shall  not  permit  its  Affiliates  to,  attack,  dispute,  or  contest  the  validity  of  or  ownership  of  such  Product
Trademark  anywhere  in  the  Territory  or  any  registrations  issued  or  issuing  with  respect  thereto  or  use  in  their  respective  businesses,  any
Trademark  that  is  confusingly  similar  to,  misleading  or  deceptive  with  respect  to  or  that  dilutes  any  (or  any  part)  of  the  Product
Trademarks.  Notwithstanding the foregoing, to the extent required by Applicable Law in a country or other jurisdiction in the Territory, the
promotional materials, packaging, and Product Labeling for the Licensed Products used by AbbVie and its Affiliates in connection with the
Licensed Products in such country or other jurisdiction shall contain (a) the corporate name of Harpoon (and to the extent required, Harpoon
grants AbbVie a license, with the right to sublicense, to use the same solely for such purpose), and (b) the logo and corporate name of the
manufacturer (if other than AbbVie or an Affiliate).

4.5

Commercial Supply of Licensed Compounds or Licensed Products.

4.5.1

 Commercial Supply of Licensed Compounds or Licensed Products. Effective on the

License Option Exercise Closing Date, as between the Parties, AbbVie shall have the sole right, at its expense, to Manufacture (or have
Manufactured) and supply the Licensed Compound and Licensed Products for commercial sale in the Territory by AbbVie and its Affiliates
and Sublicensees.

4.5.2

Manufacturing Technology Transfer Upon AbbVie’s Request.  AbbVie shall have the right,
at any time [***] the License Option Exercise Closing Date, as applicable, to require Harpoon to effect a one-time full transfer to AbbVie or
its designee (which designee may be an Affiliate or a Third Party manufacturer of Licensed Compound or Licensed Product) of all Harpoon
Know-How specifically relating to the then-current process for the Manufacture of the Licensed Compound and Licensed Products, including
process  qualification  and  validation,  quality  assurance  and  quality  control  but  excluding  [***]  (the  “Manufacturing  Process”)  and  to
implement the Manufacturing Process at a facility designated by AbbVie (such transfer and implementation, as more fully described in this
Section 4.5.2, the “Manufacturing Technology Transfer”).  Harpoon shall provide, and shall use commercially reasonable efforts to cause
its  Third  Party  manufacturers  to  provide  (including  by  using  commercially  reasonable  efforts  to  negotiate  contractual  obligations  for  such
Third  Party  manufacturers  to  do  so  under  agreements  entered  into  following  the  Effective  Date),  all  reasonable  assistance  requested  by
AbbVie to enable AbbVie (or its Affiliate or designated Third Party manufacturer, as applicable) to implement the Manufacturing Process at
the  facility  designated  by  AbbVie.    If  requested  by  AbbVie,  such  assistance  shall  include  providing  reasonable  assistance  to  AbbVie  to
facilitate  AbbVie  entering  into  agreements  with  applicable  Third  Party  suppliers  relating  to  the  Licensed  Compound  and  Licensed
Products.  Without limitation 

- 31 –

 
to the foregoing, in connection with the Manufacturing Technology Transfer, Harpoon shall, and shall use commercially reasonable efforts to
cause its Third Party manufacturers (including by using commercially reasonable efforts to negotiate contractual obligations for such Third
Party manufacturers to comply with the same obligations under agreements entered into following the Effective Date) to:

applicable) from time to time as AbbVie may request, all [***]to use and practice the Manufacturing Process;

(a)

 make available to AbbVie (or its Affiliate or designated Third Party manufacturer, as

(b)

cause  all  appropriate  [***]  assist  with  the  working  up  and  use  of  the  Manufacturing

Process [***];

(c)

without  limiting  the  generality  of  Section  4.5.2(b),  cause  all  appropriate  [***]
employees and representatives of Harpoon and its Affiliates and its Third Party manufacturers to meet with  employees or representatives of
AbbVie (or its Affiliate or designated Third Party manufacturer, as applicable) at the applicable manufacturing facility and make available all
necessary equipment, at mutually convenient times, to support and execute the transfer of all applicable analytical methods and the validation
thereof  (including,  all  applicable  Harpoon  Know-How,  methods,  validation  documents  and  other  documentation,  materials  and  sufficient
supplies of all primary and other reference standards);

take such steps as are necessary to assist in reasonable respects AbbVie (or its Affiliate
or designated Third Party manufacturer, as applicable) in obtaining any necessary licenses, permits or approvals from Regulatory Authorities
with respect to the Manufacture of the Licensed Compound and Licensed Products at the applicable facilities; and

(d)

provide  such  other  assistance  as  AbbVie  (or  its  Affiliate  or  designated  Third  Party
manufacturer, as applicable) may reasonably request to enable AbbVie (or its Affiliate or designated Third Party manufacturer, as applicable)
to use and practice the Manufacturing Process and otherwise to Manufacture Licensed Compounds and Licensed Products.

(e)

Except  to  the  extent  that  a  Manufacturing  Technology  Transfer  is  requested  in  connection  with  a  breach  of  this  Agreement,  Harpoon’s
obligations to provide personnel and support under this Section 4.5.2 shall be limited to [***].  Thereafter, if requested by AbbVie, Harpoon
shall  use  commercially  reasonable  efforts  to  continue  to  perform  such  obligations;  provided  that  AbbVie  will  reimburse  Harpoon  for  (i)
[***]), and (ii) [***]  For clarity,[***].

- 32 –

 
4.5.3

Subsequent Manufacturing Technology Transfer.  Without limiting the foregoing, if Harpoon
makes  any  invention,  discovery,  or  improvement  specifically  relating  to  the  Manufacture  of  a  Licensed  Compound  or  a  Licensed  Product
during  the  Term,  Harpoon  shall  promptly  disclose  such  invention,  discovery,  or  improvement  to  AbbVie,  and  shall,  at  AbbVie’s  request,
perform  technology  transfer  with  respect  to  such  invention,  discovery,  or  improvement  in  the  same  manner  as  provided  in  Section  4.5.2,
provided that any such further technology transfer occurring (a) prior to the License Option Exercise Closing Date shall be at Harpoon’s sole
expense and (b) after the License Option Exercise Closing Date shall be at AbbVie’s sole expense.

ARTICLE 5
GRANT OF RIGHTS

5.1

Grants to AbbVie.

5.1.1

Effective  upon  the  date  that  AbbVie  commences  performing  Initial  Development  Activities
pursuant to Section 3.1.2, Harpoon (on behalf of itself and its Affiliates) shall grant and hereby grants AbbVie a co-exclusive (with Harpoon),
royalty-free license, with the right to grant sublicenses in accordance with Section 5.3, under the Harpoon Patents, the Harpoon Know-How,
and  Harpoon’s  interests  in  the  Joint  Patents  and  the  Joint  Know-How,  solely  to  the  extent  necessary  for  AbbVie  to  conduct  Initial
Development Activities assumed by AbbVie in accordance with Section 3.1.2 (if any).  

5.1.2

Upon the [***], Harpoon (on behalf of itself and its Affiliates) hereby grants to AbbVie a co-
exclusive (with Harpoon), royalty-free (subject to [***] [***]) license, with the right to grant sublicenses in accordance with Section  5.3,
under the Harpoon Patents, the Harpoon Know-How, and Harpoon’s interests in the Joint Patents and the Joint Know-How, to Develop and
Manufacture the Licensed Compounds and Licensed Products solely to the extent necessary for AbbVie to perform [***].  For clarity, with
respect [***], AbbVie acknowledges and agrees that [***].  AbbVie further acknowledges and agrees that no sublicense is granted to AbbVie
under certain intellectual property rights licensed from [***].

hereby grants to AbbVie:

5.1.3

Upon the License Option Exercise Closing Date, Harpoon (on behalf of itself and its Affiliates)

an exclusive (including with regard to Harpoon and its Affiliates, except as provided in
Section  5.6)  license  (or  sublicense),  with  the  right  to  grant  sublicenses  in  accordance  with  Section  5.3,  under  the  Harpoon  Patents,  the
Harpoon  Know-How,  and  Harpoon’s  interests  in  the  Joint  Patents  and  the  Joint  Know-How,  to  Exploit  the  Licensed  Compounds  and
Licensed Products in the Field in the Territory;

(a)

an exclusive (including with regard to Harpoon and its Affiliates, except as provided in
Section 5.6) license and right of reference, with the right to grant sublicenses and further rights of reference in accordance with Section 5.3,
under  the  Regulatory  Approvals  and  any  other  Regulatory  Documentation  that  Harpoon  or  its  Affiliates  may  Control  with  respect  to  the
Licensed Compounds or Licensed Products solely for purposes of Exploiting the Licensed Compounds and Licensed Products in the Field in
the Territory.

(b)

- 33 –

 
effect on the License Option Exercise Closing Date without any further action required by either Party under this Agreement.

(c)

The  grants  set  forth  in  this  Section  5.1.3  will  automatically  come  into  full  force  and

5.2

Grants to Harpoon.  Upon the Effective Date, AbbVie hereby grants to Harpoon a non-exclusive, royalty-
free license, without the right to grant sublicenses (other than to permitted subcontractors of Harpoon in accordance with Section 3.7), under
the AbbVie Patents, AbbVie Know-How, and AbbVie’s interests in the Joint Patents and the Joint Know-How, to Develop and Manufacture
the Licensed Compounds or Licensed Products in the Territory solely to the extent necessary for Harpoon to perform its obligations as set
forth in, and subject to, the Initial Development Plan.

5.3

Sublicenses.    AbbVie  shall  have  the  right  to  grant  sublicenses  (or  further  rights  of  reference),  through
multiple tiers of Sublicensees, under the licenses and rights of reference granted in Sections 5.1.1, 5.1.2 and 5.1.3, to its Affiliates and other
Persons; provided that any such sublicenses shall be consistent with the terms and conditions of this Agreement and AbbVie shall remain
liable for its obligations under this Agreement and for the performance of all Sublicensees.  AbbVie shall provide Harpoon with a copy of any
such sublicense agreement within [***] after the execution thereof, which copy may be redacted with respect to information not pertinent to
compliance with this Agreement.

5.4

Distributorships.  AbbVie shall have the right, in its sole discretion, to appoint its Affiliates, and AbbVie
and  its  Affiliates  shall  have  the  right,  in  their  sole  discretion,  to  appoint  any  other  Persons,  in  the  Territory  or  in  any  country  or  other
jurisdiction of the Territory, to distribute, market, and sell the Licensed Products.  Where AbbVie or its Affiliates appoints such a Person and
such  Person  is  not  an  Affiliate  of  AbbVie  and  does  not  have  rights  to,  and  does  not,  Manufacture  any  Licensed  Product  (except  solely  to
package  or  label  such  Licensed  Product  purchased  in  bulk  form  from  AbbVie  or  its  Affiliates),  that  Person  shall  be  a  “Distributor”  for
purposes of this Agreement.

Co-Promotion Rights.  For purposes of clarity, AbbVie and its Affiliates shall have the right, in their sole
discretion, to co-promote the Licensed Products with any other Person(s), or to appoint one (1) or more Third Parties to promote the Licensed
Products without AbbVie in all or any part of the Territory.

5.5

5.6

Retention of Rights.

5.6.1

Notwithstanding  the  exclusive  licenses  granted  to  AbbVie  pursuant  to  Section 5.1.3,  Harpoon
retains the right to practice under the Harpoon Patents, the Harpoon Know-How, Harpoon’s interests in the Joint Patents and the Joint Know-
How, Regulatory Approvals and any other Regulatory Documentation (a) to perform (and to sublicense Third Parties to perform as permitted
hereunder)  its  obligations  under  this  Agreement  and  (b)  for  any  purpose  outside  the  scope  of  the  licenses  and  rights  granted  pursuant  to
Sections  3.2.3  and  5.1,  including  to  Exploit  any  products  or  services  other  than  Licensed  Compounds  or  Licensed  Products,  subject  to
Section 5.8.   Except as expressly provided herein, Harpoon grants no other right or license, including any rights or licenses to the Harpoon
Patents, the Harpoon Know-How, Harpoon’s interests in the Joint Patents and Joint Know-How, the Regulatory Documentation or any other
Patent  or  intellectual  property  rights  not  otherwise  expressly  granted  herein.  For  clarity,  if  AbbVie  does  not  exercise  its  License  Option,
Harpoon retains all rights under Harpoon’s interests in the Joint Patents and the Joint Know-How, if any, to Exploit the Licensed Compounds
and Licensed Products in its sole discretion without duty to account to AbbVie in connection with such use or Exploitation.

Except  as  expressly  provided  herein,  AbbVie  grants  no  other  right  or  license,  including  any
rights or licenses to the AbbVie Patents, the AbbVie Know-How, the Regulatory Documentation, or any other Patent or intellectual property
rights not otherwise expressly granted herein.

5.6.2

Confirmatory  Patent  License.    Harpoon  shall  if  requested  to  do  so  by  AbbVie  immediately  enter  into
confirmatory license agreements consistent with this Agreement in the form or substantially the form reasonably requested by AbbVie for
purposes of recording the licenses granted under

5.7

- 34 –

 
this  Agreement  with  such  patent  offices  in  the  Territory  as  AbbVie  considers  appropriate.    Until  the  execution  of  any  such  confirmatory
licenses,  so  far  as  may  be  legally  possible,  Harpoon  and  AbbVie  shall  have  the  same  rights  in  respect  of  the  Harpoon  Patents  and  Joint
Patents and be under the same obligations to each other in all respects as if the said confirmatory licenses had been executed.

5.8

Exclusivity with Respect to the Territory.  

Harpoon  shall  not,  and  shall  cause  its  Affiliates  not  to  (a)  directly  or  indirectly,  develop,
commercialize  or  otherwise  exploit  any  Competing  Product  in  any  country  or  other  jurisdiction  in  the  Territory,  or  (b)  license,  authorize,
appoint, or otherwise enable any Third Party to directly or indirectly, develop, commercialize or otherwise exploit any Competing Product in
any country or other jurisdiction in the Territory, except, in each case ((a) and (b)), as otherwise expressly provided in this Agreement.

5.8.1

5.8.2

Notwithstanding  the  provisions  of  Section 5.8,  if,  during  the  Term,  (a)  Harpoon  or  any  of  its
Affiliates acquires, as the result of an Acquisition, rights to a Competing Product, such Acquisition, and the development, manufacture or
commercialization  of  such  Competing  Product  thereafter,  shall  not  constitute  a  breach  of  Section  5.8  if  Harpoon  or  such  Affiliate,  as
applicable,  [***];  or  (b)  Harpoon  undergoes  a  Change  in  Control  and  the  relevant  acquirer  is  either  then  commercializing  a  Competing
Product, or has in development any Competing Product, such Change in Control, and the commercialization (or development and subsequent
commercialization, if such Competing Product receives Regulatory Approval) of such Competing Product by such relevant acquirer or any of
its Affiliates, shall not constitute a breach of Section 5.8; provided that such (x) acquirer Segregates the Competing Product and (y) AbbVie
shall have the right, in its sole and absolute discretion, by written notice delivered to Harpoon (or its successor) at any time during the [***]
following  the  written  notice  contemplated  by  Section  13.2.1,  to  (i)  terminate  any  or  all  provisions  of  this  Agreement  providing  for  any
delivery by AbbVie to Harpoon of Confidential Information of AbbVie relating to activities contemplated by this Agreement, save only for
(A)  Article  6,  (B)  information  regarding  sublicenses  pursuant  to  Section  5.3,  (C)  information  regarding  the  prosecution,  enforcement,
defense,  litigation,  infringement  and  licensing  of  Patents  pursuant  to  (1)  Sections 7.2.1, 7.2.3, 7.3.1,  7.3.5,  7.4,  and  7.5.2,  (2)  solely  with
respect to Joint Patents, Sections 7.2.2, 7.3.2, and 7.5.3, and (3) solely with respect to Joint Patents and Harpoon Patents, Sections 7.3.4 and
7.5.1, (D) notice of any license pursuant to Section 5.9.2, (E) safety data pursuant to Section 8.1, (F) proposed disclosures pursuant to Section
9.5, (G) communications under Section 11.4 and (H) notices pursuant to Sections 11.3 and 13.1; and (ii) disband the JGC and terminate its
activities, in which case the provisions set forth in the last sentence of Section 2.3 shall apply.  

5.9

In-License Agreements.

During the Term, neither Harpoon nor any of its Affiliates shall, [***], not to be unreasonably
withheld, conditioned or delayed, enter into any agreement with a Third Party related to Information, Regulatory Documentation, materials,
Patents, or other intellectual other property rights [***].

5.9.1

5.9.2

Following the License Option Exercise Closing Date, if [***] owned or controlled by a Third
Party in a particular country or jurisdiction is necessary to Exploit a Licensed Compound or Licensed Product, AbbVie shall have the first
right, but not the obligation, to negotiate and enter into an agreement with a Third Party in order to obtain a license or right under such Patent
or  intellectual  property  right.    If  AbbVie  elects  (in  a  written  communication  submitted  to  Harpoon)  not  to  enter  into  any  such  agreement,
Harpoon may enter into any such agreement.  Notwithstanding the foregoing, if a [***] owned or controlled by a Third Party is [***] 

- 35 –

 
[***], then [***] the costs associated with any such license to the Patent or other intellectual property right of such Third Party (“AbbVie
[***] Rights”).

5.9.3

If  Harpoon  or  any  of  its  Affiliates,  after  the  Effective  Date,  become  a  party  to  a  license,
sublicense  or  other  agreement  for  [***],  or  as  permitted  in  Sections 5.9.1  or  5.9.2,  then  Harpoon  shall  inform  AbbVie  and  shall  provide
AbbVie with a copy of such license, sublicense, or other agreement (“Proposed Future In-Licensed Rights”).  If AbbVie notifies Harpoon
in writing within [***] after receipt of such copy that AbbVie wishes to receive a license or sublicense (as applicable) under, and be subject
to  the  rights  and  obligations  of,  the  Proposed  Future  In-Licensed  Rights  as  they  apply  to  AbbVie  and  this  Agreement,  then  the  Proposed
Future In-Licensed Rights shall automatically be included in the Harpoon Patents and/or Harpoon Know-How (as applicable) hereunder and
AbbVie agrees to abide by all applicable terms and conditions of such license, sublicense or other agreement, as it relates to AbbVie and this
Agreement, including payment of any financial obligations based upon AbbVie’s practice of such intellectual property rights.  Effective on
and following the License Option Exercise Closing Date, AbbVie shall be solely responsible for payment of any financial obligations under
[***],  and  any  license,  sublicense  or  other  agreement  AbbVie  elects  to  enter  into  with  a  Third  Party  that  grants  rights  to  AbbVie  in
connection with the Manufacture of a Licensed Compound or Licensed Product.  Except as provided in this Section 5.9.3, Harpoon shall be
solely  responsible  for  and  shall  bear  any  and  all  payments  under  any  Harpoon  In-License  Agreements,  including  any  agreement  between
Harpoon and a Third Party entered prior to or on the Effective Date.  For the purpose of clarity, AbbVie shall not be responsible for [***], or
(b) [***] relating to the manufacture of any compound or product other than the Licensed Compounds and Licensed Products.

ARTICLE 6
PAYMENTS AND RECORDS

non-refundable, non-creditable amount equal to Thirty Million Dollars ($30,000,000).  

6.1

Upfront Payment.  No later than [***] following the Effective Date, AbbVie shall pay Harpoon an upfront,

Development  and  Regulatory  Milestones.    In  partial  consideration  of  the  rights  granted  by  Harpoon  to
AbbVie  hereunder  and  subject  to  the  terms  and  conditions  set  forth  in  this  Agreement,  AbbVie  shall  pay  to  Harpoon  a  non-refundable
milestone payment within [***] after the achievement of each of the following milestones, calculated as follows:

6.2

6.2.1

upon the License Option Exercise Closing Date, Two Hundred Million Dollars ($200,000,000);

upon  first  Initiation  of  the  Phase  I/IB  Trial  under  the  Initial  Development  Plan  for  a  Licensed
Compound in the U.S., Fifty Million Dollars ($50,000,000); provided that subject to Section 3.1.3, (a) if [***] [***], but [***], this milestone
payment shall be [***], and (b) if such [***] occurs on or after [***], this milestone payment shall be [***];

6.2.2

6.2.3

upon [***], [***]; 

- 36 –

 
6.2.4

6.2.5

upon [***], [***]; and

upon [***] and [***], [***].

Each milestone payment in this Section 6.2 shall be payable only upon the first achievement of such milestone and no amounts shall be due
for  subsequent  or  repeated  achievements  of  such  milestone,  whether  for  the  same  or  a  different  Licensed  Compound  or  Licensed
Product.  The maximum aggregate amount payable by AbbVie pursuant to this Section 6.2 is [***].

First Commercial Sales Milestones.  In partial consideration of the rights granted by Harpoon to AbbVie
hereunder and subject to the terms and conditions set forth in this Agreement, AbbVie shall pay to Harpoon the following non-refundable
milestone payments due within [***] after the achievement of each of the following milestones, calculated as follows:

6.3

6.3.1

6.3.2

upon [***] Licensed Product, [***]; and

upon the First Commercial Sale for the first Licensed Product to achieve such [***], [***].

Each milestone payment in this Section 6.3 shall be payable only upon the first achievement of such milestone and no amounts shall be due
for  subsequent  or  repeated  achievements  of  such  milestone,  whether  for  the  same  or  a  different  Licensed  Compound  or  Licensed
Product.  The maximum aggregate amount payable by AbbVie pursuant to this Section 6.3 is [***].

6.4

Sales-Based Milestones.  In partial consideration of the rights granted by Harpoon to AbbVie hereunder and

subject to the terms and conditions set forth in this Agreement, AbbVie shall pay to Harpoon the following non-refundable milestone
payments due within [***] after the end of the [***] in which such milestone was achieved for the aggregate sales of all Licensed Products in
the Territory, calculated as follows:[***].

Each milestone payment in this Section 6.4 shall be payable only upon the first achievement of such milestone in a [***], and no amounts
shall be due for subsequent or repeated achievements of such milestone in subsequent [***], whether for the same or a different Licensed
Compound or Licensed Product.  The maximum aggregate amount payable by AbbVie pursuant to this Section is [***].

6.5

Royalties. 

- 37 –

 
6.5.1

Royalty Rates.  As further consideration for the rights granted to AbbVie hereunder, subject to
Section  6.5.3,  commencing  upon  the  First  Commercial  Sale  of  a  Licensed  Product  in  the  Territory,  on  a  Licensed  Product-by-Licensed
Product basis, AbbVie shall pay to Harpoon a royalty on Net Sales of each Licensed Product in the Territory (excluding Net Sales of each
Licensed Product in any country or other jurisdiction in the Territory for which the Royalty Term for such Licensed Product in such country
or other jurisdiction has expired) during [***] at the following rates:

Net Sales in the Territory of each Licensed Product in a [***]

Royalty Rate

For that portion of aggregate Net Sales of each Licensed Product[***]

For that portion of aggregate Net Sales of each Licensed Product[***]

For that portion of aggregate Net Sales of each Licensed Product[***]

[***]

[***]

[***]

With respect to each Licensed Product in each country or other jurisdiction in the Territory, [***].

Royalty Term.  AbbVie shall have no obligation to pay any royalty with respect to Net Sales of
any  Licensed  Product  in  any  country  or  other  jurisdiction  after  the  Royalty  Term  for  such  Licensed  Product  in  such  country  or  other
jurisdiction has expired.  

6.5.2

6.5.3

Reductions.  Notwithstanding the foregoing:

(a)

if  in  any  country  or  other  jurisdiction  in  the  Territory  during  the  Royalty  Term  for  a

Licensed Product (i) there is [***], then for each such country 
or other jurisdiction, starting with the [***] occurs, the royalties payable to Harpoon for the Net Sales of such Licensed Product in such country
or other 
jurisdiction shall be [***] set forth in Section 6.5.1; (ii) there [***], then for each such country or other jurisdiction, starting with the [***], the
royalties  payable  to  Harpoon  for  the  Net  Sales  of  such  Licensed  Product  in  such  country  or  other  jurisdiction  shall  be  [***]  set  forth  in
Section 6.5.1; and (iii) if for any [***] during the Royalty Term [***] in such country or other jurisdiction during such [***], then the royalties
due to Harpoon pursuant to this Section 6.5 in 
such country or other jurisdiction shall be [***] in each such [***].  For purposes herein, (A) [***] (B) [***]

- 38 –

 
[***] in each case ((A) and (B)) of the unit sales of such Licensed Product sold in that country or other jurisdiction by AbbVie, its Affiliates and
Sublicensees.  Unless otherwise agreed by the Parties, [***] sold during a [***] shall be as reported by [***] or any successor or any other
independent sales auditing firm reasonably agreed upon by the Parties;

(b)

if  AbbVie  enters  into  an  agreement  with  a  Third  Party  in  order  to  obtain  a  license  or
right under [***] owned or controlled by such Third Party in a particular country or other jurisdiction pursuant to Section 5.9.2, AbbVie shall
be entitled to deduct from [***] hereunder with respect to a Licensed Product for a particular country or other jurisdiction [***] of [***] paid
to such Third Party (excluding [***]) as consideration for the grant of the license or sublicense in connection with such Licensed Product
(and  to  the  extent  reasonably  allocable  to  the  Licensed  Product,  if  such  Third  Party  agreement  is  also  applicable  to  other  programs  or
products of AbbVie) for such country or other jurisdiction; provided that in no case shall such deduction reduce such [***] set forth in [***]
[***]. For clarity, no reduction shall apply in connection with payments made by AbbVie in connection with any [***];

calculating the royalties payable with respect to such Licensed Product under Section 6.5.1, [***]; and

(c)

[***]  in  a  country  or  other  jurisdiction  in  the  Territory,  then,  for  the  purposes  of

if, and in such case from and after the date on which, a Licensed Product is Exploited in
a country or other jurisdiction and such Licensed Product is not either or both (i) [***] or (ii) covered by (A) [***] Licensed Product in such
country or other jurisdiction or (B) a [***] in such country or other jurisdiction, then the royalty rate set forth in Section 6.5.1 with respect to
such country or other jurisdiction (for purposes of calculations under Section 6.5.1), shall be reduced by [***];.

(d)

In no event will the cumulative reductions under the foregoing Sections 6.5.3(a) through
6.5.3(d) reduce the [***] payable to Harpoon on any Licensed Product in any [***] by greater than [***] of the amounts otherwise payable
under Section 6.5.1 for such Licensed Product.  Credits not exhausted in any [***] may be carried into future [***], subject to the foregoing
sentence.

(e)

6.6

Royalty  Payments  and  Reports.    AbbVie  shall  calculate  all  amounts  payable  to  Harpoon  pursuant  to
Section 6.5  at  the  end  of  each  [***],  which  amounts  shall  be  converted  to  Dollars,  in  accordance  with  Section 6.7.   AbbVie  shall  pay  to
Harpoon the royalty amounts due with respect to a given [***] within [***] after the end of such [***].  Each payment of royalties due to
Harpoon shall be accompanied by a statement of the amount of Net Sales of each Licensed Product in each country or other jurisdiction the
Territory during the applicable [***] (including such amounts expressed in local currency and as converted to Dollars) and a calculation of
the amount of royalty payment due on such Net Sales for such [***], including the amount of any reductions pursuant to Section 6.5.3.

Dollars in the requisite amount to such bank account as the receiving Party may from

6.7

Mode of Payment; Offsets.  All payments to either Party under this Agreement shall be made by deposit of

- 39 –

 
time to time designate by notice to the paying Party.  For the purpose of calculating any sums due under, or otherwise reimbursable pursuant
to,  this  Agreement  (including  the  calculation  of  Net  Sales  expressed  in  currencies  other  than  Dollars),  a  Party  shall  convert  any  amount
expressed in a foreign currency into Dollar equivalents using its, its Affiliate’s or Sublicensee’s standard conversion methodology consistent
with Accounting Standards.  [***].

6.8

Withholding Taxes.

6.8.1

Withholding Amounts.  Where any sum due to be paid to either Party hereunder is subject to
any withholding or similar tax, the Parties shall use their commercially reasonable efforts to do all such acts and things and to sign all such
documents as will enable them to take advantage of any applicable double taxation agreement or treaty.  In the event there is no applicable
double taxation agreement or treaty, or if an applicable double taxation agreement or treaty reduces but does not eliminate such withholding
or similar tax, the payor shall remit such withholding or similar tax to the appropriate government authority, deduct the amount paid from the
amount due to payee and secure and send to payee the best available evidence of the payment of such withholding or similar tax.  Any such
amounts deducted by the payor in respect of such withholding or similar tax shall be treated as having been paid by the payor for purposes of
this Agreement.  If withholding or similar taxes are paid to a government authority, each Party will provide the other such assistance as is
reasonably required to obtain a refund of the withheld or similar taxes, or to obtain a credit with respect to such taxes paid.  In the event that a
government authority retroactively determines that a payment made by the paying Party to the receiving Party pursuant to this Agreement
should have been subject to withholding or similar (or to additional withholding or similar) taxes, and such paying Party (the “Withholding
Party”)  remits  such  withholding  or  similar  taxes  to  the  government  authority,  including  any  interest  and  penalties  that  may  be  imposed
thereon (together with the tax paid, the “Withholding Amount”),  the  Withholding  Party  will  have  the  right  (a)  to  offset  the  Withholding
Amount  against  future  payment  obligations  of  the  Withholding  Party  under  this  Agreement  or  (b)  to  invoice  the  receiving  Party  for  the
Withholding Amount (which shall be payable by the receiving Party within [***] of its receipt of such invoice), or to pursue reimbursement
of the Withholding Amount by any other available remedy.

6.8.2

Withholding Actions. Notwithstanding the foregoing, the Parties acknowledge and agree that if
AbbVie (or its assignee pursuant to Section 13.4) is required by Applicable Law to withhold taxes in respect of any amount payable under
this Agreement, and if such withholding obligation arises as a result of any action taken by AbbVie or its Affiliate or successor or assignee,
including without limitation an assignment of this Agreement as permitted under Section 13.4 of this Agreement, a change in tax residency of
AbbVie, or payments arise or are deemed to arise through a branch of AbbVie and such withholding taxes exceed the amount of withholding
taxes that would have been applicable if such action had not occurred (each an “AbbVie Withholding Tax Action”), then, any such amount
payable  shall  be  increased  to  take  into  account  such  increased  withholding  taxes  as  may  be  necessary  so  that,  after  making  all  required
withholdings Harpoon (or its assignee pursuant to Section 13.4) receives an amount equal to the sum it would have received had no such
AbbVie  Withholding  Tax  Action  occurred.    Harpoon  shall  (a)  use  its  commercially  reasonable  efforts  to  obtain  an  exemption  of  such
withheld  amounts  to  the  extent  practicable  under  Applicable  Law  and  (b)  cooperate  with  AbbVie  to  obtain  a  reduction  or  refund  of  such
withheld amounts.

6.9

Indirect Taxes.  Except as otherwise provided in this Agreement, all payments due under this Agreement are
exclusive of value added taxes, sales taxes, consumption taxes and other similar taxes (the “Indirect Taxes”).  Notwithstanding anything to
the contrary in this Agreement, AbbVie shall be responsible for any Indirect Taxes as well as any transfer, documentary, sales use, stamp,
registration, value added or other similar tax that is imposed with respect to the payments or the related transfer of rights or other property
pursuant to the terms of this Agreement.  If the Indirect Taxes originally paid or otherwise borne by the paying Party are in whole or in part
subsequently determined not to have been chargeable, all reasonably necessary steps will be taken by the receiving Party to receive a refund
of these undue Indirect Taxes from the

- 40 –

 
applicable governmental authority or other fiscal authority and any amount of undue Indirect Taxes repaid by such authority to the receiving
Party will be transferred to the paying Party within [***] of receipt.

6.10

Interest on Late Payments.  If  any  payment  due  to  either  Party  under  this  Agreement  is  not  paid  when
due, then such paying Party shall pay interest thereon (before and after any judgment) at [***] such interest to run from the date on which
payment of such sum became due until payment thereof in full together with such interest; provided however that [***], then such interest
[***], as adjusted from time to time on the [***].

6.11

Audit.  AbbVie shall, shall cause its Affiliates to, and shall use commercially reasonable efforts to cause its
Sublicensees to, keep complete and accurate books and records pertaining to Net Sales of Licensed Products, in sufficient detail to calculate
all  amounts  payable  hereunder.    At  the  request  of  Harpoon,  AbbVie  shall  permit  an  independent  public  accounting  firm  of  nationally
recognized standing designated by Harpoon and reasonably acceptable to AbbVie, [***], to audit the books and records maintained pursuant
to this Section 6.11 to ensure the accuracy of all reports and payments made hereunder, including any permitted deductions from Net Sales
pursuant to Section 1.108.  Such examinations may not (a) be conducted for any [***] [***] (b) be conducted more than once in any [***]
period or (c) be [***] (unless a previous audit revealed an underpayment with respect to such [***]).  The accounting firm shall disclose to
Harpoon only whether the reports are correct or not, and the specific details concerning any discrepancies.  No other information shall be
shared.    Except  as  provided  below,  the  cost  of  this  audit  shall  be  borne  by  Harpoon,  unless  the  audit  reveals  a  variance  [***]  from  the
reported amounts or [***], in which case AbbVie shall bear the cost of the audit.

6.12

Audit Dispute.  In the event of a dispute with respect to any audit under Section 6.11, Harpoon and AbbVie
shall work in good faith to resolve the disagreement.  If the Parties are unable to reach a mutually acceptable resolution of any such dispute
within [***], the dispute shall be submitted for resolution to a certified public accounting firm jointly selected by each Party’s certified public
accountants or to such other Person as the Parties shall mutually agree (the “Audit Expert”).  The decision of the Audit Expert shall be final
and the costs of such determination as well as the initial audit shall be borne between the Parties in such manner as the Audit Expert shall
determine.    Not  later  than  [***]  after  such  decision  and  in  accordance  with  such  decision,  AbbVie  shall  pay  the  additional  amounts  or
Harpoon shall reimburse the excess payments, as applicable.

6.13

Confidentiality.    The  receiving  Party  shall  treat  all  information  subject  to  review  under  this  Article 6  in
accordance with the confidentiality provisions of Article 9 and the Parties shall cause the Audit Expert to enter into a reasonably acceptable
confidentiality  agreement  with  AbbVie  obligating  such  firm  to  retain  all  such  financial  information  in  confidence  pursuant  to  such
confidentiality agreement.

6.14

[***]    The  development  and  regulatory  milestone  payments,  first  commercial  sales  milestone  payments,
sales-based  milestone  payments  and  royalties  in  Sections  6.2,  6.3  6.4,  and  6.5  shall  not  apply  at  the  same  rates  to  Development  and
Commercialization of Licensed Compounds or Licensed Products [***] for eligibility to be treated for such disease, state, or condition with a
Licensed Compound or Licensed Product or for monitoring patients who are or have been treated with a Licensed Compound or Licensed
Product.  In the event that a Licensed Compound or Licensed Product is Developed for any such purposes, [***] for the sale of such Licensed
Product that [***] of such Licensed Product and [***], as applicable; provided that, for clarity,  any such [***]

- 41 –

 
[***] [***] under this Agreement with respect to Licensed Compounds or Licensed Products that are [***].

6.15

No  Other  Compensation.    Each  Party  hereby  agrees  that  the  terms  of  this  Agreement  fully  define  all
consideration,  compensation  and  benefits,  monetary  or  otherwise,  to  be  paid,  granted  or  delivered  by  one  Party  to  the  other  Party  in
connection  with  the  transactions  contemplated  herein.  Neither  Party  previously  has  paid  or  entered  into  any  other  commitment  to  pay,
whether orally or in writing, any of the other Party’s employees, directly or indirectly, any consideration, compensation or benefits, monetary
or otherwise, in connection with the transaction contemplated herein.

ARTICLE 7
INTELLECTUAL PROPERTY

7.1

Ownership of Intellectual Property.

7.1.1

Ownership  of  Technology.    Subject  to  Section  3.8.2(c)  and  Section  7.1.2,  as  between  the
Parties, each Party, or their respective Affiliates, shall own and retain all right, title, and interest in and to any and all: (a) Information and
inventions  that  are  conceived,  discovered,  developed,  or  otherwise  made  by  or  on  behalf  of  such  Party  or  its  Affiliates  (including
subcontractors thereof) under or in connection with this Agreement, whether or not patented or patentable, and any and all Patents and other
intellectual  property  rights  with  respect  thereto,  except  to  the  extent  that  any  such  Information  or  invention  or  any  Patent  or  intellectual
property rights with respect thereto, is Joint Know-How or Joint Patents, and (b) other Information, inventions, Patents, and other intellectual
property rights that are owned or otherwise Controlled (other than pursuant to the license grants set forth in Sections 5.1 and 5.2)  by  such
Party or its Affiliates.

7.1.2

Ownership of Joint Patents and Joint Know-How.  Subject to Section 3.8.2(c), as between the
Parties, each Party, or their respective Affiliates, shall own an equal, undivided interest in and to any and all (a)  Information and inventions
that are conceived, discovered, developed or otherwise made jointly by or on behalf of Harpoon or its Affiliates (including subcontractors
thereof), on the one hand, and AbbVie or its Affiliates (including subcontractors thereof), on the other hand, in connection with the work
conducted under or in connection with this Agreement, in each case whether or not patented or patentable (the “Joint Know-How”),  and
(b) Patents (the “Joint Patents”) and other intellectual property rights with respect to the Information and inventions described in subclause
(a) (together with Joint Know-How and Joint Patents, the “Joint Intellectual Property Rights”).  Each Party shall promptly disclose to the
other  Party  in  writing,  and  shall  cause  its  Affiliates,  licensees  and  sublicensees  to  so  disclose,  the  development,  making,  conception  or
reduction to practice of any Joint Know-How or Joint Patents.  Subject to the licenses and rights of reference granted under Sections 5.1 and
5.2 and, in the case of Harpoon, its exclusivity obligations hereunder, each Party shall have the right to Exploit the Joint Intellectual Property
Rights without a duty of seeking consent from or accounting to the other Party.  Notwithstanding the foregoing, with respect to (1) any [***],
and (2) any [***].

United States Law.   The  determination  of  whether  Information  and  inventions  are  conceived,
discovered,  developed,  or  otherwise  made  by  a  Party  for  the  purpose  of  allocating  proprietary  rights  (including  Patent,  copyright  or  other
intellectual property rights) therein, shall, for purposes of this Agreement, be made in accordance with Applicable Law in the United States.

7.1.3

- 42 –

 
7.1.4

Assignments.  

(a)

Each  Party  shall  cause  all  Persons  who  perform  activities  for  such  Party  under  this
Agreement  to  prospectively  or  be  under  an  obligation  to  assign  (or,  if  Applicable  Law  does  not  permit  such  Person  to  agree  to  such
assignment obligation despite such Party’s using commercially reasonable efforts to negotiate such assignment obligation, provide a license
under)  all  of  their  rights  in  any  Information  and  inventions  resulting  therefrom  to  such  Party,  except  where  Applicable  Law  requires
otherwise  and  except  in  the  case  of  governmental,  not-for-profit  and  public  institutions  which  have  standard  policies  against  such  an
assignment (in which case a suitable license, or right to obtain such a license, shall be obtained).

Each  Party  will  promptly  disclose  to  the  other  Party  in  writing,  the  conception,
discovery,  development  or  making  of  any  Joint  Know-How  or  Joint  Patents  by  Persons  who  perform  activities  for  it  under  this
Agreement.  Each Party will execute and record assignments and other necessary documents consistent with such ownership promptly upon
request.

(b)

7.2

Maintenance and Prosecution of Patents.

7.2.1

Patent Prosecution and Maintenance of Harpoon Patents and Joint Patents.  

(a)

Subject to Section 7.2.1(b), Harpoon shall have the right, but not the obligation, through
the use of internal or outside counsel to prepare, file, prosecute, and maintain the Harpoon Patents and Joint Patents worldwide, at Harpoon’s
sole cost and expense.  Where a Harpoon Patent or Joint Patent [***].  Harpoon shall [***] with regard to the preparation, filing, prosecution,
and maintenance of such Harpoon Patents or Joint Patents, including by providing AbbVie with a copy of material communications to and
from any patent authority in the Territory regarding such Harpoon Patents or Joint Patents, and by providing AbbVie drafts of any material
filings or responses to be made to such patent authorities in the Territory sufficiently in advance of submitting such filings or responses so as
to allow for a reasonable opportunity for AbbVie to review and comment thereon.  Harpoon shall consider in good faith the requests and
suggestions  of  AbbVie  with  respect  to  such  drafts  and  with  respect  to  strategies  for  filing  and  prosecuting  such  Harpoon  Patents  or  Joint
Patents in the Territory.  Notwithstanding the foregoing, Harpoon shall promptly inform AbbVie of any adversarial patent office proceeding
or sua sponte filing, including a request for, or filing or declaration of, any interference, opposition, or re-examination relating to a Harpoon
Patent or Joint Patent in the Territory.  The Parties shall thereafter consult and cooperate to determine a course of action with respect to any
such  proceeding  in  the  Territory  and  Harpoon  shall  consider  in  good  faith  all  comments,  requests  and  suggestions  provided  by
AbbVie.    [***]    If  Harpoon  decides  not  to  prepare,  file,  prosecute,  or  maintain  a  Harpoon  Patent  or  Joint  Patent  in  a  country  or  other
jurisdiction in the Territory, Harpoon shall provide reasonable prior written notice to AbbVie of such intention (which notice shall, in any
event, be given no later than [***] prior to the next deadline for any action that may be taken with respect to such Harpoon Patent or Joint
Patent  in  such  country  or  other  jurisdiction),  AbbVie  shall  thereupon  have  the  option,  in  its  sole  discretion,  to  assume  the  control  and
direction of the preparation, filing, prosecution, and maintenance of such Harpoon Patent or Joint Patent at its expense in such country or
other jurisdiction.  Upon AbbVie’s written acceptance of such option, AbbVie shall assume the responsibility and control for the preparation,
filing, prosecution, and maintenance of such Harpoon Patent or Joint Patent.  In such event, Harpoon shall reasonably cooperate with AbbVie
in such country or other jurisdiction as provided under Section 7.2.3.

Compound or Licensed Product, AbbVie shall have the responsibility for and control over the 

(b)

On  and  after  the  License  Option  Exercise  Closing  Date  with  respect  to  a  Licensed

- 43 –

 
preparation,  filing,  prosecution,  and  maintenance  of  all  Harpoon  Patents  that  [***](“Product-Specific  Patents”)  and  Joint  Patents,  at
AbbVie’s sole cost and expense.  For clarity, Product-Specific Patents shall not include [***], including any Patent that [***] as long as such
Harpoon  Patent  does  not  include  any  claim  [***].    AbbVie  shall  keep  Harpoon  fully  informed  of  all  material  steps  with  regard  to  the
preparation,  filing,  prosecution,  and  maintenance  of  Product-Specific  Patents  or  Joint  Patents.    If  AbbVie  decides  not  to  prepare,  file,
prosecute,  or  maintain  a  Product-Specific  Patent  or  Joint  Patent  in  a  country  or  other  jurisdiction  in  the  Territory,  AbbVie  shall  provide
reasonable prior written notice to Harpoon of such intention (which notice shall, in any event, be given no later than [***] prior to the next
deadline for any action that may be taken with respect to such Product-Specific Patent or Joint Patent in such country or other jurisdiction),
and Harpoon shall thereupon have the option, in its sole discretion, to assume the control and direction of the preparation, filing, prosecution,
and  maintenance  of  such  Product-Specific  Patent  or  Joint  Patent  at  its  sole  cost  and  expense  in  such  country  or  other  jurisdiction.  Upon
Harpoon’s written acceptance of such option, Harpoon shall assume the responsibility and control for the preparation, filing, prosecution, and
maintenance of such specific Product-Specific Patent or Joint Patent. In such event, AbbVie shall reasonably cooperate with Harpoon in such
country or other jurisdiction as provided under Section 7.2.3.  

the obligation, to prepare, file, prosecute, and maintain the AbbVie Patents worldwide, at AbbVie’s sole cost and expense.  

7.2.2

Patent Prosecution and Maintenance of AbbVie Patents.  AbbVie shall have the right, but not

maintenance of the Harpoon Patents and Joint Patents in the Territory under this Agreement.  Cooperation shall include:

7.2.3

Cooperation.   The  Parties  agree  to  cooperate  fully  in  the  preparation,  filing,  prosecution,  and

without  limiting  any  other  rights  and  obligations  of  the  Parties  under  this  Agreement,
cooperating  with  respect  to  the  timing,  scope  and  filing  of  such  Patents  to  preserve  and  enhance  the  patent  protection  for  Licensed
Compounds and Licensed Products, including the manufacture and use thereof;

(a)

executing  all  papers  and  instruments,  or  requiring  its  employees  or  contractors  to
execute  such  papers  and  instruments,  so  as  to  (i)  effectuate  the  ownership  of  intellectual  property  set  forth  in  Section  7.1.1  and  7.1.2;
(ii)  enable  the  other  Party  to  apply  for  and  to  prosecute  Patent  applications  in  the  Territory;  and  (iii)  obtain  and  maintain  any  Patent
extensions, supplementary protection certificates, and the like with respect to the Harpoon Patents and Joint Patents in the Territory, in each
case ((i), (ii), and (iii)) to the extent provided for in this Agreement;

(b)

applicable governmental authorities that may be available in the Territory for the protection of a Party’s interests in this Agreement; and

(c)

consistent  with  this  Agreement,  assisting  in  any  license  registration  processes  with

may materially affect the preparation, filing, prosecution, or maintenance of any such Patents in the Territory.

(d)

promptly informing the other Party of any matters coming to such Party’s attention that

Patent  Term  Extension  and  Supplementary  Protection  Certificate.  AbbVie  shall  be
responsible for making decisions regarding patent term extensions, including supplementary protection certificates and any other extensions
that are now or become available in the future, wherever applicable, for AbbVie Patents, Joint Patents and Product-Specific Patents in any
country or other jurisdiction 

7.2.4

- 44 –

 
and for applying for any extension (including patent term extension and supplementary protection certificate) with respect to such Patents in
the Territory.  Harpoon shall provide prompt and reasonable assistance, as requested by AbbVie, including by taking such action as patent
holder as is required under any Applicable Law to obtain such extension.  AbbVie shall pay all expenses in regard to obtaining such extension
in the Territory.  

7.2.5

European Patents.  On or after the License Option Exercise Closing Date, AbbVie shall have
the sole right to decide whether a Joint Patent or a Product-Specific Patent should be validated or maintained as a Unitary Patent, whether and
when such Patent should be opted out of or opted in to the jurisdiction of the Unified Patent Court (UPC) (including withdrawal of an opt-
out), as well as any other issues concerning the jurisdiction of the UPC in connection with such Patent.  Harpoon shall, at AbbVie’s cost and
expense, cooperate with AbbVie and provide to AbbVie and submit to authorities all necessary documents to effect such decision.

7.2.6

Patent Listings.  With respect to each Licensed Product, AbbVie will have the sole right to list
Joint Patents and Product-Specific Patents with Regulatory Authorities or other agencies, including as required or allowed under Applicable
Law.    AbbVie  shall  notify  Harpoon  in  writing  of  any  Harpoon  Patents  that  it  intends  to  list  with  Regulatory  Authorities  related  to  the
Licensed  Products  and,  prior  to  filing  any  such  listing,  consult  with  and  consider  in  good  faith  the  requests  and  suggestions  of  Harpoon
regarding the same.

7.3

Enforcement of Patents.

7.3.1

Enforcement of Harpoon Patents.  Each Party shall promptly notify the other Party in writing
of  any  alleged  or  threatened  infringement  of  the  Product-Specific  Patents  by  a  Third  Party  in  the  Territory  of  which  such  Party  becomes
aware  based  on  the  development,  commercialization  or  Exploitation  of,  or  an  application  to  market,  a  Licensed  Product  or  a  product
containing a Licensed Compound in the Territory (the “Product Infringement”).  AbbVie shall have the sole right, but not the obligation, to
prosecute any Product Infringement involving any claims of Product-Specific Patents at its sole expense and AbbVie shall retain control of
the prosecution of such claim, suit or proceeding.  Harpoon shall have the right to join as a party to such claim, suit, or proceeding in the
Territory and participate with its own counsel at its own expense; provided that AbbVie shall retain control of the prosecution of such claim,
suit,  or  proceeding.    During  any  such  claim,  suit,  or  proceeding,  AbbVie  shall  keep  Harpoon  reasonably  informed  of  all  material
developments  in  connection  with  such  claim,  suit  or  proceeding.  If  AbbVie  does  not  take  commercially  reasonable  steps  to  prosecute
(including settling) such a Product Infringement in a country or jurisdiction, then  (a) Harpoon may, but is not obligated to, prosecute the
Product Infringement at its own expense in such country or jurisdiction, and (b) if Harpoon prosecutes such Product Infringement and obtains
an injunction that prevents the sale of a Biosimilar Product by such Third Party in such country or jurisdiction, AbbVie shall not be entitled to
apply any royalty reductions pursuant to Section 6.5.3(a) that would otherwise apply as a result of the sale of such Biosimilar Product by
such Third Party after the period of such injunction.  

7.3.2

Enforcement of AbbVie Patents and Joint Patents.  

Each Party shall promptly notify the other Party in writing of any alleged or threatened
infringement of the Harpoon Patents that are not Product-Specific Patents, AbbVie Patents or Joint Patents by a Third Party in the Territory
of  which  such  Party  becomes  aware  based  on  the  development,  commercialization,  Exploitation,  or  an  application  to  market  a  Licensed
Product or a product containing a Licensed Compound in the Territory.  

(a)

Subject  to  Sections  7.3.3  and  7.3.4,  Harpoon  shall  have  the  first  right,  but  not  the
obligation, to prosecute any such alleged or threatened infringement of Harpoon Patents that are not Product-Specific Patents in the Territory
at its sole expense and Harpoon shall retain control of the 

(b)

- 45 –

 
prosecution of such claim, suit or proceeding.  If Harpoon prosecutes any such infringement, AbbVie shall have the right to join as a party to
such claim, suit or proceeding in the Territory and participate with its own counsel at its own expense; provided that Harpoon shall retain
control  of  the  prosecution  of  such  claim,  suit  or  proceeding.    During  any  such  claim,  suit,  or  proceeding,  Harpoon  shall  keep  AbbVie
reasonably informed of all material developments in connection with such claim, suit or proceeding.  If Harpoon does not take commercially
reasonable  steps  to  prosecute  the  alleged  or  threatened  infringement  in  the  Territory  with  respect  to  such  Harpoon  Patents,  then  solely
following the License Option Exercise Closing Date, AbbVie may prosecute such infringement in the Territory at its own expense, unless
Harpoon reasonably believes that the prosecution of such infringement by AbbVie would have a material adverse impact on Harpoon’s global
patent  portfolio,  or  upon  the  use  or  application  of  such  Harpoon  Patents  in  connection  with  other  products  and  compounds  Controlled  by
Harpoon,  its  Affiliates  or  sublicensees.    For  clarity,  this  Section 7.3.2(b)  is  inapplicable  to  any  biosimilar  patent  litigation  relating  to  any
Licensed Compound or Licensed Product as set forth in Sections 7.3.3 and 7.3.4.

AbbVie  shall  have  the  sole  right,  but  not  the  obligation,  to  prosecute  any  such
infringement of the AbbVie Patents in the Territory at its sole expense and AbbVie shall retain control of the prosecution of such claim, suit
or proceeding.  

(c)

(d)

AbbVie  shall  have  the  first  right,  but  not  the  obligation,  to  prosecute  any  such
infringement  of  Joint  Patents  in  the  Territory  at  its  sole  expense  and  AbbVie  shall  retain  control  of  the  prosecution  of  such  claim,  suit  or
proceeding.  If AbbVie prosecutes any such infringement, Harpoon shall have the right to join as a party to such claim, suit or proceeding in
the Territory and participate with its own counsel at its own expense; provided that AbbVie shall retain control of the prosecution of such
claim,  suit  or  proceeding.    During  any  such  claim,  suit,  or  proceeding,  AbbVie  shall  keep  Harpoon  reasonably  informed  of  all  material
developments in connection with such claim, suit or proceeding.  If AbbVie does not take commercially reasonable steps to prosecute the
alleged or threatened infringement in the Territory with respect to such Joint Patents, then Harpoon may prosecute such infringement in the
Territory at its own expense.

7.3.3

Patent Exclusivity Listings.  If either Party receives a copy of an application submitted to the
FDA under subsection (k) of Section 351 of the PHSA (a “Biosimilar Application”) naming a Licensed Product as a reference product or
otherwise becomes aware that such a Biosimilar Application has been filed (such as in an instance described in Section 351(l)(9)(C) of the
PHSA), such Party shall, within [***], notify the other Party so that the other Party may seek permission to view the application and related
confidential information from the filer of the Biosimilar Application under Section 351(l)(1)(B)(iii) of the PHSA.  If either Party receives any
equivalent or similar certification or notice in any other jurisdiction in the Territory, either Party shall, within [***], notify and provide the
other  Party  with  copies  of  such  communication.    Regardless  of  the  Party  that  is  the  “reference  product  sponsor”  for  purposes  of  such
Biosimilar Application, (a) [***]; (b) AbbVie shall have the right to list any AbbVie Patents, Joint Patents, Product-Specific Patents, and,
upon the written consent of Harpoon, such consent not to be unreasonably withheld, conditioned or delayed (taking into account, without
limitation,  the  potential  impact  of  such  consent  on  Harpoon’s  platform  technology  and/or  other  products  undergoing  development  or
commercialization  by  Harpoon  or  its  Third  Party  licensees  and  covered  by  such  Harpoon  Patents),  other  Harpoon  Patents,  insofar  as  they
cover the Biosimilar Product as required pursuant to Section 351(l)(3)(A), Section 351(l)(5)(b)(i)(II), or Section 351(l)(7) of the PHSA, to
respond to any communications with respect to such lists from the filer of the Biosimilar Application, and to negotiate with the filer of the
Biosimilar Application as to whether to utilize a different mechanism for information exchange than that specified in Section 351(l) of the
PHSA; and (c) [***] shall have the sole right to identify such Patents or respond to communications under any equivalent or similar listing in
any  other  jurisdiction  in  the  Territory.    If  required  pursuant  to  Applicable  Law,  [***]  shall  prepare  such  lists  and  make  such  responses  at
[***]  Harpoon shall cooperate with AbbVie’s reasonable requests in connection therewith, including meeting any submission deadlines, in
each case, to the extent required or permitted by Applicable Law.  AbbVie shall (A) reasonably consult with [***] 

- 46 –

 
[***] to a Third Party as contemplated by this Section 7.3.3, and shall consider in good faith Harpoon’s advice, requests and suggestions with
respect thereto, and (B) notify Harpoon of any such lists or communications promptly after they are made.

7.3.4

Conduct of Biosimilar Patent Litigation Including Under the Biologics Price Competition
and Innovation Act.  Notwithstanding anything to the contrary in this Section 7.3, AbbVie shall be responsible for initiating and managing
any biosimilar litigation relating to Licensed Compounds or Licensed Products worldwide. AbbVie shall have the first right to bring an action
for infringement of the AbbVie Patents, Joint Patents, Product-Specific Patents and, upon the written consent of Harpoon, such consent not to
be unreasonably withheld, conditioned or delayed (taking into account, without limitation, the potential impact of such consent on Harpoon’s
platform  technology  and/or  other  products  undergoing  development  or  commercialization  by  Harpoon  or  its  Third  Party  licensees  and
covered  by  such  Harpoon  Patents),  other  Harpoon  Patents,  including  as  required  under  Section  351(l)(6)  of  the  PHSA  following  the
agreement on a list of patents for litigation under Section 351(l)(4) or exchange of Patent lists pursuant to Section 351(l)(5)(B) of such act, or
as  required  following  any  equivalent  or  similar  certification  or  notice  in  any  other  jurisdiction.    If  Harpoon  decides  pursuant  to  this
Agreement not to allow AbbVie to include such other Harpoon Patents in a litigation against a biosimilar applicant for a biosimilar product,
Harpoon shall not assert such Patent in any litigation against the same biosimilar applicant for the same biosimilar product without written
approval by AbbVie.  The Parties’ rights and obligations with respect to the foregoing legal actions shall be as set forth in Sections 7.3.1
through 7.3.5; provided  that  within  [***]  of  reaching  agreement  on  a  list  of  Patents  for  litigation  under  Section  351(l)(4)  or  exchange  of
Patent  lists  pursuant  to  Section  351(l)(5)(B),  AbbVie  shall  notify  Harpoon  as  to  whether  or  not  it  elects  to  prosecute  such
infringement.    Either  Party  shall,  within  [***],  notify  and  provide  the  other  Party  with  copies  of  any  notice  of  commercial  marketing
provided by the filer of a Biosimilar Application pursuant to Section 351(l)(8)(A) of the PHSA, or any equivalent or similar certification or
notice in any other jurisdiction.  Thereafter, AbbVie shall have the first right to seek an injunction or other remedies against such commercial
marketing as permitted pursuant to Section 351(l)(8)(B) of the PHSA.

7.3.5

Cooperation.  The Parties agree to cooperate fully in any infringement action pursuant to this
Section 7.3.  Where a Party brings such an action in accordance with this Agreement, the other Party shall, where necessary, furnish a power
of attorney solely for such purpose or shall join in, or be named as a necessary party to, such action.  Unless otherwise set forth herein, the
Party entitled to bring any patent infringement litigation in accordance with this Section 7.3 shall have the right to settle such claim; provided
that neither Party shall have the right to settle any patent infringement litigation under this Section 7.3 in a manner that imposes any costs or
liability on, or involves any admission by, the other Party, without the express written consent of such other Party.  The Party commencing
the litigation shall provide the other Party with copies of all pleadings and other documents filed with the court if doing so would not waive
any privilege or violate any court order or Applicable Law, and shall consider reasonable input from the other Party during the course of the
proceedings.

Recovery. Any recovery realized as a result of such litigation described in Section 7.3.1, 7.3.2,
or 7.3.5 (whether by way of settlement or otherwise) shall be first, allocated to reimburse the Parties for their costs and expenses in making
such recovery (which amounts shall be allocated pro rata if insufficient to cover the totality of such expenses).  [***]

7.3.6

Licensed Product in the Territory pursuant to this Agreement results in, or may result 

7.4

Infringement  Claims  by  Third  Parties.    If  the  manufacture,  sale,  or  use  of  a  Licensed  Compound  or

- 47 –

 
in, any claim, suit, or proceeding by a Third Party alleging patent infringement by AbbVie (or its Affiliates or Sublicensees), AbbVie shall
promptly notify Harpoon thereof in writing.  Subject to Section 11.2, AbbVie shall have the first right, but not the obligation, to defend and
control the defense of any such claim, suit, or proceeding at its own expense, using counsel of its own choice.  Harpoon may participate in
any such claim, suit, or proceeding with counsel of its choice at its own expense.  The assumption of the defense of a claim that may be
subject to Section 11.2 by either AbbVie or Harpoon shall not be construed as an acknowledgment that Harpoon is liable to indemnify any
AbbVie Indemnitee in respect of such indemnity claim, nor shall it constitute a waiver by Harpoon of any defenses it may assert against an
AbbVie  Indemnitee’s  claim  for  indemnification.    Without  limitation  of  the  foregoing,  if  AbbVie  finds  it  necessary  or  desirable  to  join
Harpoon as a party to any such action, Harpoon shall, at AbbVie’s expense, execute all papers and perform such acts as shall be reasonably
required.  If AbbVie elects (in a written communication submitted to Harpoon within a reasonable amount of time after notice of the alleged
patent infringement) not to defend or control the defense of, or otherwise fails to initiate and maintain the defense of, any such claim, suit, or
proceeding, within such time periods so that Harpoon is not prejudiced by any delays, Harpoon may conduct and control the defense of any
such claim, suit, or proceeding at its own expense.  Each Party shall keep the other Party reasonably informed of all material developments in
connection with any such claim, suit, or proceeding.  [***] under this Section 7.4 shall be [***]

7.5

Invalidity or Unenforceability Defenses or Actions.

Notice.  Each Party shall promptly notify the other Party in writing of any alleged or threatened
assertion of invalidity, unpatentability or unenforceability of any of the Harpoon Patents, AbbVie Patents, or Joint Patents by a Third Party, in
each case in the Territory and of which such Party becomes aware.

7.5.1

7.5.2

Harpoon Patents.  

(a)

Subject to Section 7.5.2(b), Harpoon shall have the first right, but not the obligation, to
defend  and  control  the  defense  of  the  validity,  patentability  and  enforceability  of  the  Harpoon  Patents  at  its  own  expense  in  the
Territory.   AbbVie  may  participate  in  any  such  claim,  suit,  or  proceeding  in  the  Territory  with  counsel  of  its  choice  at  its  own  expense;
provided that Harpoon shall retain control of the defense in such claim, suit, or proceeding.  If Harpoon elects not to defend or control the
defense of such Harpoon Patents in a suit brought in the Territory, or otherwise fails to initiate and maintain the defense of any such claim,
suit,  or  proceeding,  then  solely  with  respect  to  Product-Specific  Patents  included  in  the  Harpoon  Patents,  and  subject  to  Section  7.5.2(b),
AbbVie may request to conduct and control the defense of any such claim, suit, or proceeding at its own expense, with Harpoon’s consent not
to be unreasonably withheld, conditioned or delayed.

On  and  after  the  License  Option  Exercise  Closing  Date,  AbbVie  shall  have  the
responsibility for and control over the defense of the validity, patentability and enforceability of Product-Specific Patents at AbbVie’s sole
cost  and  expense.  Harpoon  may  participate  in  any  such  claim,  suit,  or  proceeding  in  the  Territory  with  counsel  of  its  choice  at  its  own
expense; provided that AbbVie shall retain control of the defense in such claim, suit, or proceeding.  If AbbVie elects not to defend or control
the defense of such Product-Specific Patents in a suit brought in the Territory, or otherwise fails to initiate and maintain 

(b)

- 48 –

 
the defense of any such claim, suit, or proceeding, then Harpoon may conduct and control the defense of any such claim, suit, or proceeding
at its own expense.

7.5.3

AbbVie Patents and Joint Patents.  

defense of the validity and enforceability of the AbbVie Patents at its own expense in the Territory.

(a)

AbbVie  shall  have  the  sole  right,  but  not  the  obligation,  to  defend  and  control  the

(b)

The Party who is prosecuting the Joint Patents at the relevant time shall have the first
right, but not the obligation, to defend and control the defense of the validity and enforceability of the Joint Patents at its own expense in the
Territory.  The other Party may participate in any such claim, suit, or proceeding in the Territory related to the Joint Patents with counsel of
its  choice  at  its  own  expense;  provided  that  the  Party  who  is  prosecuting  the  Joint  Patents  at  the  relevant  time  shall  retain  control  of  the
defense in such claim, suit, or proceeding.  If the Party who is prosecuting the Joint Patents at the relevant time elects not to defend or control
the defense of the Joint Patents in a suit brought in the Territory, or otherwise fails to initiate and maintain the defense of any such claim, suit,
or proceeding, then the other Party may conduct and control the defense of any such claim, suit, or proceeding, at its own expense.

7.5.4

Cooperation. Each Party shall assist and cooperate with the other Party as such other Party may
reasonably  request  from  time  to  time  in  connection  with  its  activities  set  forth  in  this  Section  7.5,  including  by  being  joined  as  a  party
plaintiff  in  such  action  or  proceeding,  providing  access  to  relevant  documents  and  other  evidence,  and  making  its  employees  available  at
reasonable business hours.  In connection with any such defense or claim or counterclaim, the controlling Party shall consider in good faith
any comments from the other Party and shall keep the other Party reasonably informed of any steps taken, and shall provide copies of all
documents filed, in connection with such defense, claim, or counterclaim provided that doing so would not waive any privilege or violate any
court order or Applicable Law.  In connection with the activities set forth in this Section 7.5, each Party shall consult with the other as to the
strategy for the defense of the Harpoon Patents and Joint Patents.  Neither Party shall have the right to settle any claim, suit, or proceeding
under this Section 7.5 in a manner that imposes any costs or liability on, or involves any admission by, the other Party, without the express
written consent of such other Party.

7.5.5

Relationship to Enforcement of Patents.  Notwithstanding anything herein to the contrary, the
defense to any challenge of validity, enforceability or patentability of any of the Harpoon Patents, AbbVie Patents, or Joint Patents that is
raised in connection with or in response to an infringement action or a biosimilar litigation shall be controlled by the Party who controls that
infringement  action  or  biosimilar  litigation,  and  such  Party  shall  have  the  right  to  manage,  resolve,  settle  or  dispose  any  such  challenge
according to Section 7.3, provided that (a) with respect to any Harpoon Patents that are not Product-Specific Patents and are not involved in
any biosimilar patent litigation, where AbbVie is the controlling Party in connection with an infringement action, AbbVie shall not resolve,
settle or dispose of such action or litigation in any way that would admit liability on the part of Harpoon, or materially impact the validity,
scope or enforceability of such Harpoon Patent, without Harpoon’s prior written consent, not to be unreasonably withheld or delayed, and (b)
with respect to any Harpoon Patents for which Harpoon did not give its consent to include within a biosimilar litigation, and Harpoon is the
controlling Party in connection with an infringement action involving such Patents, then Harpoon shall be the controlling Party in connection
with  the  defense  to  any  challenge  of  validity,  enforceability  or  patentability  of  such  Harpoon  Patents,  but  shall  reasonably  consult  with
AbbVie in connection with any such defense, and shall consider in good faith AbbVie’s reasonable comments in relation thereto.

7.6

Product Trademarks.  As between the Parties, AbbVie shall own all right, title, and interest to the Product
Trademarks in the Territory, and shall be responsible for the registration, prosecution, maintenance and enforcement thereof.  All costs and
expenses  of  registering,  prosecuting,  maintaining  and  enforcing  the  Product  Trademarks  shall  be  borne  solely  by  AbbVie.    Harpoon  shall
provide all assistance and 

- 49 –

 
documents  reasonably  requested  by  AbbVie  in  support  of  its  prosecution,  registration,  maintenance  and  enforcement  of  the  Product
Trademarks.

7.7

International  Nonproprietary  Name.    As  between  the  Parties,  AbbVie  shall  have  the  sole  right  and
responsibility  to  select  the  International  Nonproprietary  Name  or  other  name  or  identifier  for  any  Licensed  Compound  or  Licensed
Product.  AbbVie shall have the sole right and responsibility to apply for submission to the World Health Organization for the International
Nonproprietary Name, and submission to the United States Adopted Names Council for the United States Adopted Name.

such Party's inventors under any applicable inventor remuneration laws.

7.8

Inventor's Remuneration.    Each  Party  shall  be  solely  responsible  for  any  remuneration  that  may  be  due

7.9

Common Interest.  All information exchanged between the Parties regarding the prosecution, maintenance,
enforcement and defense of Patents under this Article 7 will be deemed to be Confidential Information of the disclosing Party.  In addition,
the Parties acknowledge and agree that, with regard to such prosecution, maintenance, enforcement and defense, the interests of the Parties as
collaborators  and  Harpoon  and  licensee  are  to,  for  their  mutual  benefit,  obtain  patent  protection  and  plan  patent  defense  against  potential
infringement activities by Third Parties, and as such, are aligned and are legal in nature.  The Parties agree and acknowledge that they have
not  waived,  and  nothing  in  this  Agreement  constitutes  a  waiver  of,  any  legal  privilege  concerning  Patents  under  this  Article 7,  including
privilege under the common interest doctrine and similar or related doctrines.  Notwithstanding anything to the contrary in this Agreement, to
the extent a Party has a good faith belief that any information required to be disclosed by such Party to the other Party under this Article 7 is
protected by attorney-client privilege or any other applicable legal privilege or immunity, such Party shall not be required to disclose such
information  and  the  Parties  shall  in  good  faith  cooperate  to  agree  upon  a  procedure  (which  may  include  entering  into  a  specific  common
interest agreement, disclosing such information on a “for counsel eyes only” basis or similar procedure) under which such information may
be disclosed without waiving or breaching such privilege or immunity.

ARTICLE 8
PHARMACOVIGILANCE AND SAFETY

8.1

Pharmacovigilance.    Within  [***]  after  the  License  Option  Exercise  Closing  Date,  the  Parties  shall  enter
into an agreement to initiate a process for the exchange of adverse event safety data in a mutually agreed format, including postmarketing
spontaneous  reports  received  by  the  Party  or  its  Affiliates  in  order  to  (a)  with  respect  to  AbbVie,  monitor  the  safety  of  the  Licensed
Compound  or  Licensed  Product  and  to  meet  reporting  requirements  with  any  applicable  Regulatory  Authority  and  (b)  with  respect  to
Harpoon, permit reasonable access to adverse event safety data for Licensed Compounds or Licensed Products, in each case ((a) and (b)) at
AbbVie’s expense.  Notwithstanding the forgoing, if any adverse event safety data is received or otherwise generated by Harpoon following
the  License  Option  Exercise  Closing  Date  and  prior  to  the  execution  of  such  agreement,  Harpoon  shall,  within  [***]  of  receiving  or
otherwise generating such data, provide such data to AbbVie by email to: [***].  

8.2

Global Safety Database.  Harpoon shall initially set up, hold and maintain (at its sole cost and expense) the
global  safety  database  for  Licensed  Compounds  and  Licensed  Products  with  respect  to  safety  data  obtained  in  connection  with  the  Initial
Development Activities.  Within [***] after the License Option Exercise Closing Date, Harpoon shall transfer to AbbVie, in an electronic
format reasonably satisfactory to AbbVie, the complete contents of the safety database maintained by Harpoon pursuant to the immediately
foregoing sentence, and thereafter AbbVie shall set up, hold, and maintain (at AbbVie’s sole cost and expense) the global safety database for
Licensed  Compounds  or  Licensed  Products.    Harpoon  shall  provide  AbbVie  with  all  information  necessary  or  desirable  for  AbbVie  to
comply with its pharmacovigilance responsibilities in the Territory, including, as applicable, any adverse drug experiences, from pre-clinical
or clinical laboratory, animal toxicology and pharmacology studies, Clinical Studies, and commercial experiences 

- 50 –

 
with  a  Licensed  Compound  or  Licensed  Product,  in  each  case  in  any  form  agreed  upon  between  AbbVie  and  Harpoon  at  the  time  of  the
request.

ARTICLE 9
CONFIDENTIALITY AND NON-DISCLOSURE

9.1

Product  Information.    Harpoon  recognizes  that  by  reason  of  AbbVie’s  status  as  an  exclusive  optionee
pursuant  to  the  grants  under  Section  3.2.3,  AbbVie  has  an  interest  in  Harpoon  maintaining  the  confidentiality  of  certain  information  of
Harpoon.   Accordingly,  following  the  License  Option  Exercise  Closing  Date  and  for  the  remainder  of  the  Term,  Harpoon  shall,  and  shall
cause its Affiliates and its and their respective officers, directors, employees, and agents to, keep confidential, and not publish or otherwise
disclose, and not use directly or indirectly for any purpose other than to fulfill Harpoon’s obligations hereunder any Information owned or
otherwise  Controlled  by  Harpoon  or  any  of  its  Affiliates  specifically  relating  to  any  Licensed  Compound  or  Licensed  Product,  or  the
Exploitation of any of the foregoing (the “Product Information”); except to the extent (a) the Product Information is in the public domain
through no fault of Harpoon, its Affiliates or any of its or their respective officers, directors, employees, or agents; (b) such disclosure or use
is  expressly  permitted  under  Section  9.3,  or  (c)  such  disclosure  or  use  is  otherwise  expressly  permitted  by  the  terms  of  this
Agreement.  Product Information shall not include [***].  For purposes of Section 9.3, effective as of License Option Exercise Closing Date
and for the remainder of the Term, AbbVie shall be deemed to be the disclosing Party with respect to Product Information under Section 9.3
and Harpoon shall be deemed to be the receiving Party with respect thereto.  For further clarification, (i) without limiting this Section 9.1, to
the extent Product Information is disclosed by Harpoon to AbbVie pursuant to this Agreement, such information shall, subject to the other
terms and conditions of this Article 9,  also  constitute  Confidential  Information  of  Harpoon  with  respect  to  the  use  and  disclosure  of  such
Information by AbbVie, but (ii) the disclosure by Harpoon to AbbVie of Product Information shall not cause such information to cease to be
subject to the provisions of this Section 9.1 with respect to the use and disclosure of such Confidential Information by Harpoon. [***].  

9.2

Confidentiality Obligations.  At all times during the Term and for a period of [***] following termination
or expiration hereof in its entirety, each Party shall, and shall cause its officers, directors, employees and agents to, keep confidential and not
publish or otherwise disclose to a Third Party and not use, directly or indirectly, for any purpose, any Confidential Information furnished or
otherwise made known to it, directly or indirectly, by the other Party, except to the extent such disclosure or use is expressly permitted by the
terms  of  this  Agreement  or  is  necessary  or  reasonably  useful  for  the  performance  of,  or  the  exercise  of  such  Party’s  rights  under,  this
Agreement.  Notwithstanding the foregoing, to the extent the receiving Party can demonstrate by documentation or other competent proof,
the  confidentiality  and  non-use  obligations  under  this  Section  9.2  with  respect  to  any  Confidential  Information  shall  not  include  any
information that:

has  been  published  by  a  Third  Party  or  otherwise  is  or  hereafter  becomes  part  of  the  public
domain by public use, publication, general knowledge or the like through no wrongful act, fault or negligence on the part of the receiving
Party;

9.2.1

- 51 –

 
has been in the receiving Party’s possession prior to disclosure by the disclosing Party without
any  obligation  of  confidentiality  with  respect  to  such  information;  provided  that  the  foregoing  exception  shall  not  apply  with  respect  to
Regulatory Documentation (excluding clinical protocols) or Joint Know-How;

9.2.2

without breach of any agreement between such Third Party and the disclosing Party;

9.2.3

is  subsequently  received  by  the  receiving  Party  from  a  Third  Party  without  restriction  and

disclosure; or

9.2.4

is  generally  made  available  to  Third  Parties  by  the  disclosing  Party  without  restriction  on

has been independently developed by or for the receiving Party without reference to, or use or
disclosure  of,  the  disclosing  Party’s  Confidential  Information;  provided  that  the  foregoing  exception  shall  not  apply  with  respect  to
Regulatory Documentation (excluding clinical protocols) or Joint Know-How.

9.2.5

Specific  aspects  or  details  of  Confidential  Information  shall  not  be  deemed  to  be  within  the  public  domain  or  in  the  possession  of  the
receiving  Party  merely  because  the  Confidential  Information  is  embraced  by  more  general  information  in  the  public  domain  or  in  the
possession of the receiving Party.  Further, any combination of Confidential Information shall not be considered in the public domain or in
the possession of the receiving Party merely because individual elements of such Confidential Information are in the public domain or in the
possession  of  the  receiving  Party  unless  the  combination  and  its  principles  are  in  the  public  domain  or  in  the  possession  of  the  receiving
Party.

is:

9.3

Permitted Disclosures.  Each Party may disclose Confidential Information to the extent that such disclosure

9.3.1

in  the  reasonable  opinion  of  the  receiving  Party’s  legal  counsel,    required  to  be  disclosed
pursuant  to  law,  regulation  or  a  valid  order  of  a  court  of  competent  jurisdiction  or  other  supra-national,  federal,  national,  regional,  state,
provincial  or  local  governmental  body  of  competent  jurisdiction,    (including  by  reason  of  filing  with  securities  regulators,  but  subject  to
Section 9.5); provided that the receiving Party shall first have given prompt written notice (and to the extent possible, at least [***] notice) to
the  disclosing  Party  and  given  the  disclosing  Party  a  reasonable  opportunity  to  take  whatever  action  it  deems  necessary  to  protect  its
Confidential Information.  In the event that no protective order or other remedy is obtained, or the disclosing Party waives compliance with
the  terms  of  this  Agreement,  the  receiving  Party  shall  furnish  only  that  portion  of  Confidential  Information  which  the  receiving  Party  is
advised by counsel is legally required to be disclosed;

made  by  or  on  behalf  of  the  receiving  Party  to  the  Regulatory  Authorities  as  required  in
connection  with  any  filing,  application  or  request  for  Regulatory  Approval  of  a  Licensed  Product  in  accordance  with  the  terms  of  this
Agreement; provided that reasonable measures shall be taken to assure confidential treatment of such Confidential Information to the extent
practicable and consistent with Applicable Law;

9.3.2

made  by  or  on  behalf  of  the  receiving  Party  to  a  patent  authority  as  may  be  necessary  or
reasonably  useful  for  purposes  of  preparing,  obtaining,  defending  or  enforcing  a  Patent  in  accordance  with  the  terms  of  this  Agreement;
provided  that  reasonable  measures  shall  be  taken  to  assure  confidential  treatment  of  such  Confidential  Information,  to  the  extent  such
protection is available;

9.3.3

made  to  its  or  its  Affiliates’  financial  and  legal  advisors  who  have  a  need  to  know  such
disclosing Party’s Confidential Information and are either under professional codes of conduct giving rise to expectations of confidentiality
and non-use or under written agreements of confidentiality and 

9.3.4

- 52 –

 
non-use, in each case, at least as restrictive as those set forth in this Agreement; provided that the receiving Party shall remain responsible for
any failure by such financial and legal advisors, to treat such Confidential Information as required under this Article;

made by the receiving Party or its Affiliates to potential or actual investors or acquirers as may
be necessary in connection with their evaluation of such potential or actual investment or acquisition; provided that such Persons shall be
subject to obligations of confidentiality and non-use with respect to such Confidential Information substantially similar to the obligations of
confidentiality and non-use of the receiving Party pursuant to this Article 9;

9.3.5

9.3.6

made by AbbVie or its Affiliates or Sublicensees to its or their advisors, consultants, clinicians,
vendors, service providers, contractors, existing or prospective collaboration partners, licensees, sublicensees, or other Third Parties as may
be  necessary  or  useful  in  connection  with  the  Exploitation  of  the  Licensed  Compound,  the  Licensed  Products,  or  otherwise  in  connection
with  the  performance  of  its  obligations  or  exercise  of  its  rights  as  contemplated  by  this  Agreement;  provided  that  such  Persons  shall  be
subject to obligations of confidentiality and non-use with respect to such Confidential Information substantially similar to the obligations of
confidentiality and non-use of AbbVie pursuant to this Article 9; or

9.3.7

made by Harpoon or its Affiliates after receiving advanced approval from AbbVie, to its or their
advisors, consultants, clinicians, vendors, service providers, contractors, or other Third Parties as may be necessary or useful in connection
with the performance of their obligations or exercise of their rights as contemplated by this Agreement; provided that such Persons shall be
subject  to  obligations  of  confidentiality  and  non-use  with  respect  to  such  Confidential  Information  of  AbbVie  substantially  similar  to  the
obligations of confidentiality and non-use of Harpoon pursuant to this Article 9; provided, further, that the advanced approval requirement set
forth in this Section 9.3.7 shall not apply to Third Party Providers approved by AbbVie pursuant to Section 3.7.

9.4

Use of Name.  Except as expressly provided herein, neither Party shall mention or otherwise use the name,
logo, or Trademark of the other Party or any of its Affiliates (or any abbreviation or adaptation thereof) in any publication, press release,
marketing and promotional material, or other form of publicity without the prior written approval of such other Party in each instance.  The
restrictions  imposed  by  this  Section 9.4  shall  not  prohibit  either  Party  from  making  any  disclosure  identifying  the  other  Party  that,  in  the
opinion  of  the  disclosing  Party’s  counsel,  is  required  by  Applicable  Law;  provided  that  such  Party  shall  submit  the  proposed  disclosure
identifying the other Party in writing to the other Party as far in advance as reasonably practicable (and in no event less than [***] prior to the
anticipated date of disclosure) so as to provide a reasonable opportunity to comment thereon.    

9.5

Public Announcements.  Neither Party shall issue any other public announcement, press release, or other
public disclosure regarding this Agreement or its subject matter without the other Party’s prior written consent, except for any such disclosure
that is, in the opinion of the disclosing Party’s counsel, required by Applicable Law or the rules of a stock exchange on which the securities
of the disclosing Party are listed (or to which an application for listing has been submitted).  Notwithstanding the foregoing, Harpoon shall be
free  to  issue  any  public  announcement,  press  release,  or  other  public  disclosure  related  to  (a)  [***],  (b)  [***],  (c)  [***],  and  (d)  any
publication, presentation or disclosure that was permitted under Section 9.6, provided that any such disclosure under (a) through (d) does not
contain any Confidential Information of AbbVie.  In the event a Party is, in the opinion of its counsel, required by Applicable Law or 

- 53 –

 
the rules of a stock exchange on which its securities are listed (or to which an application for listing has been submitted) to make such a
public disclosure, such Party shall submit the proposed disclosure in writing to the other Party as far in advance as reasonably practicable
(and to the extent possible, at least [***] prior to the anticipated date of disclosure) so as to provide a reasonable opportunity to comment
thereon.    Notwithstanding  the  foregoing,  AbbVie,  its  Sublicensees  and  its  and  their  respective  Affiliates  shall  have  the  right  to  publicly
disclose research, development and commercial information (including with respect to regulatory matters) regarding the Licensed Compound
and Licensed Products, provided that any such disclosure does not contain any Confidential Information of Harpoon.

9.6

Publications. The Parties acknowledge that scientific publications must be monitored to prevent any adverse
effect from premature publication of results of the activities contemplated hereunder.  Prior to the License Option Exercise Closing Date, if
Harpoon intends to publish, present (including presentation at any scientific meeting) or otherwise disclose Information related specifically to
the  Exploitation  of  the  Licensed  Compound  or  Licensed  Products,  Harpoon  shall  provide  AbbVie  with  such  proposed  publication,
presentation or disclosure at least [***] prior to the intended publication date, provided that [***].  AbbVie will have the right to reasonably
review  and  comment  to  such  publication,  presentation  or  disclosure,  and  Harpoon  shall  in  good  faith  consider  any  comments  made  by
AbbVie  in  such  [***]  period.    If  such  publication,  presentation  or  disclosure  contains  Confidential  Information  of  AbbVie,  then  upon
AbbVie’s request during such [***] period, Harpoon shall delete any such information identified by AbbVie.  If there is a dispute regarding
Harpoon’s right to publish prior to the License Option Exercise Closing Date, such dispute shall be escalated to the Senior Officers of each
Party for resolution, provided that subject to the foregoing sentence, Harpoon shall have the right to make a final decision with respect to
such publication.  Following the License Option Exercise Closing Date, Harpoon shall not publish, present, or otherwise disclose, and shall
cause  its  Affiliates  and  Third  Party  Providers  and  its  and  their  employees  and  agents  not  to  disclose  any  Product  Information  without  the
prior written consent of AbbVie, except as required by Applicable Law.  

9.7

Return of Confidential Information.  Upon the effective date of the termination of this Agreement for any
reason,  either  Party  may  request  in  writing,  and  the  other  Party  shall  either,  with  respect  to  Confidential  Information  (in  the  event  of
termination of this Agreement with respect to [***] Terminated Territories but not in its entirety, solely to the extent relating specifically and
exclusively to such Terminated Territories) to which such other Party does not retain rights under the surviving provisions of this Agreement:
(a) as soon as reasonably practicable, destroy all copies of such Confidential Information in the possession of the other Party and confirm
such  destruction  in  writing  to  the  requesting  Party;  or  (b)  as  soon  as  reasonably  practicable,  deliver  to  the  requesting  Party,  at  such  other
Party’s expense, all copies of such Confidential Information in the possession of such other Party; provided  that  such  other  Party  shall  be
permitted to retain one (1) copy of such Confidential Information for the sole purpose of performing any continuing obligations or exercising
any surviving rights hereunder, as required by Applicable Law, or for litigation or archival purposes.  Notwithstanding the foregoing, such
other  Party  also  shall  be  permitted  to  retain  such  additional  copies  of  or  any  computer  records  or  files  containing  such  Confidential
Information that have been created solely by such Party’s automatic archiving and back-up procedures, to the extent created and retained in a
manner consistent with such other Party’s standard archiving and back-up procedures, but not for any other use or purpose.  

9.8

Survival.  All Confidential Information shall continue to be subject to the terms of this Agreement for the

period set forth in Section 9.2.

- 54 –

 
ARTICLE 10
REPRESENTATIONS AND WARRANTIES

other, as of the Effective Date, as follows:

10.1

Mutual  Representations  and  Warranties.    Harpoon  and  AbbVie  each  represents  and  warrants  to  the

Organization.  It  is  a  corporation  duly  incorporated,  validly  existing,  and  in  good  standing
under the laws of the jurisdiction of its incorporation, and has all requisite corporate power and authority, to execute, deliver, and perform this
Agreement.

10.1.1

10.1.2

Authorization.  The execution and delivery of this Agreement and the performance by it of the
transactions  contemplated  hereby  have  been  duly  authorized  by  all  necessary  corporate  action,  and  do  not  violate  (a)  such  Party’s  charter
documents, bylaws, or other organizational documents, (b) in any material respect, any agreement, instrument, or contractual obligation to
which such Party is bound, (c) any requirement of any Applicable Law, or (d) any order, writ, judgment, injunction, decree, determination, or
award of any court or governmental agency presently in effect applicable to such Party.

Binding Agreement.  This Agreement is a legal, valid, and binding obligation of such Party
enforceable against it in accordance with its terms and conditions, subject to the effects of bankruptcy, insolvency, or other laws of general
application  affecting  the  enforcement  of  creditor  rights,  judicial  principles  affecting  the  availability  of  specific  performance,  and  general
principles of equity (whether enforceability is considered a proceeding at law or equity).

10.1.3

No Inconsistent Obligation.    It  is  not  under  any  obligation,  contractual  or  otherwise,  to  any
Person that conflicts with or is inconsistent in any material respect with the terms of this Agreement, or that would impede the diligent and
complete fulfillment of its obligations hereunder.

10.1.4

10.1.5

No  Misstatements  or  Omissions.    The  representations  and  warranties  of  such  Party  in  this
Agreement, and the Information, documents and materials furnished to the other Party in response to such Party’s written requests for due
diligence information prior to the Effective Date, do not, taken as a whole, (a) contain any untrue statement of a material fact, or (b) omit to
state any material fact necessary to make the statements or facts contained therein, in light of the circumstances under which they were made,
not misleading.

further represents and warrants to AbbVie, as of the Effective Date, as follows:

10.2

Additional Representations and Warranties of Harpoon.  Except as set forth on Schedule 10.2, Harpoon

10.2.1

All  Harpoon  Patents  existing  as  of  the  Effective  Date  are  listed  on  Schedule  10.2.1  (the
“Existing  Patents”).    To  Harpoon’s  Knowledge,  all  Existing  Patents  existing  as  of  the  Effective  Date  are  subsisting  and,  to  Harpoon’s
Knowledge,  are  not  invalid  or  unenforceable,  in  whole  or  in  part,  are  being  diligently  prosecuted  in  the  applicable  patent  offices  in  the
Territory  in  accordance  with  Applicable  Law,  and  have  been  filed  and  maintained  properly  and  correctly  in  all  material  aspect  and  all
applicable fees have been paid on or before the due date for payment.

10.2.2

There  are  no  judgments,  or  settlements  against,  or  amounts  with  respect  thereto,  owed  by
Harpoon  or  any  of  its  Affiliates  relating  to  the  Existing  Patents,  or  the  Harpoon  Know-How.    No  claim  or  litigation  has  been  brought  or
threatened in writing or any other form by any Person alleging, and Harpoon has no Knowledge of any claim, whether or not asserted, that
the  Existing  Patents  are  invalid  or  unenforceable.    To  Harpoon’s  Knowledge,  the  Development  or  Commercialization  of  the  Licensed
Compounds  or  Licensed  Products  as  contemplated  herein,  does  not  or  will  not  violate,  infringe,  misappropriate  or  otherwise  conflict  or
interfere with, any Patent or other intellectual property or proprietary right of any Third 

- 55 –

 
Party.  To Harpoon’s Knowledge, no Person is infringing or threatening to infringe or misappropriating or threatening to misappropriate the
Existing Patents or the Harpoon Know-How.

10.2.3

Harpoon is (a) the sole and exclusive owner of the entire right, title and interest in the Existing
Patents listed on Schedule 10.2.1, Part A (the “Owned Patents”) and the Harpoon Know-How and (b) the sole and exclusive licensee of the
Existing  Patents  listed  on  Schedule  10.2.1,  Part  B  (the  “In-Licensed  Patents”)  which  are  subject  to  valid  and  enforceable  in-license
agreements, in each case ((a) and (b)) free of any encumbrance, lien, or claim of ownership by any Third Party.  Harpoon is entitled to grant
the licenses specified herein.  The Owned Patents and In-Licensed Patents represent all of the Existing Patents.  

Harpoon  has  the  right  to  use  and  license  (or  sublicense  as  the  case  may  be)  to  AbbVie  all
Information  and  Patents  necessary  to  Develop,  Manufacture  and  Commercialize  the  Licensed  Compounds  and  the  Licensed  Products  as
contemplated herein.  The Harpoon Patents and Harpoon Know-How are not and will not be subject to any license or other agreement to
which Harpoon or any of its Affiliates is a party other than a Harpoon In-License Agreement.

10.2.4

Third Party is in material breach of any Harpoon In-License Agreement.  

10.2.5

As of the Effective Date, none of Harpoon or its Affiliates and, to Harpoon’s Knowledge, any

True, complete, and correct copies of: (a) Harpoon In-License Agreements; and (b) all material
adverse information with respect to the safety and efficacy of the Licensed Compounds known to Harpoon, in each case ((a) through (c))
have been provided or made available to AbbVie prior to the Effective Date.

10.2.6

Harpoon  and  its  Affiliates  have  generated,  prepared,  maintained,  and  retained  all  Regulatory
Documentation that is required to be maintained or retained pursuant to and in accordance with Applicable Law, and all such information is
in all material aspect true, complete and correct and what it purports to be.

10.2.7

10.2.8

Each Person who has or has had any rights in or to any Owned Patents or any Harpoon Know-
How,  including  any  current  or  former  officer,  employee,  agent  or  consultant  of  Harpoon  or  any  of  its  Affiliates,  has  assigned  and  has
executed an agreement assigning its entire right, title, and interest in and to such Owned Patents and Harpoon Know-How to Harpoon. To
Harpoon’s Knowledge, no current or former officer, employee, agent, or consultant of Harpoon or any of its Affiliates is in material violation
of any term of any assignment or other agreement regarding the protection of Patents or other intellectual property or proprietary information
of Harpoon or any Third Party related to the Harpoon Patents, Harpoon Know-How, Licensed Compounds or Licensed Products.

All rights in all inventions and discoveries, made, developed, or conceived by any employee or
independent contractor of Harpoon or any of its Affiliates, and included in Harpoon Know-How or that are the subject of one (1) or more
Existing Patents have been assigned in writing to Harpoon or such Affiliate.

10.2.9

10.2.10

Harpoon  has  obtained  the  right  (including  under  any  Patents  and  other  intellectual  property
rights)  to  use  all  material  Information  and  other  materials  (including  any  formulations  and  manufacturing  processes  and  procedures)
developed or delivered by any Third Party under any agreements between Harpoon and any such Third Party that is necessary or reasonably
useful for the Development or Commercialization of Licensed Compounds, and Harpoon has the rights under each such agreement to license
and transfer such Information or other materials to AbbVie and its designees and to grant AbbVie the right to use such Information or other
materials in the Development or Commercialization of the Licensed Compounds or the Licensed Products as set forth in this Agreement.

- 56 –

 
Harpoon  has  made  (and  will  make)  available  to  AbbVie,  as  set  forth  in  Section  3.5.1,  all
Regulatory  Documentation  and  Harpoon  Know-How  and  all  such  Regulatory  Documentation  and  Harpoon  Know-How  are  (and,  if  made
available after the Effective Date, will be), to Harpoon’s Knowledge, true, complete, and correct.  Neither Harpoon nor any of its Affiliates
has any Knowledge of [***] that has not been disclosed to AbbVie as of the Effective Date.  [***] of a Licensed Product.

10.2.11

10.2.12

Neither  Harpoon  nor  any  of  its  Affiliates,  nor  any  of  its  or  their  respective  officers,
employees, or, to Harpoon’s Knowledge, agents has made an untrue statement of material fact or fraudulent statement to the FDA or any
other  Regulatory  Authority  with  respect  to  the  Development  of  the  Licensed  Compounds  or  the  Licensed  Products,  failed  to  disclose  a
material  fact  required  to  be  disclosed  to  the  FDA  or  any  other  Regulatory  Authority  with  respect  to  the  Development  of  the  Licensed
Compounds or the Licensed Products, or committed an act, made a statement, or failed to make a statement with respect to the Development
of the Licensed Compounds or the Licensed Products that could reasonably be expected to provide a basis for the FDA to invoke its policy
respecting  “Fraud,  Untrue  Statements  of  Material  Facts,  Bribery,  and  Illegal  Gratuities”,  set  forth  in  56  Fed.  Reg.  46191  (September  10,
1991) and any amendments thereto or any analogous laws or policies in the Territory.

There  are  no  amounts  that  will  be  required  to  be  paid  to  a  Third  Party  as  a  result  of  the
Development or Commercialization of the Licensed Compounds or Licensed Products that arise out of any agreement to which Harpoon or
any of its Affiliates is a party.

10.2.13

10.2.14

Neither Harpoon nor any of its employees nor, to Harpoon’s Knowledge, agents performing
hereunder, have ever been, are currently, or are the subject of a proceeding that could lead to it or such employees or agents becoming, as
applicable,  a  Debarred  Entity  or  Debarred  Individual,  an  Excluded  Entity  or  Excluded  Individual  or  a  Convicted  Entity  or  Convicted
Individual or added to the FDA’s Disqualified/Restricted List.  If, during the Term, Harpoon, or any of its employees or agents performing
hereunder, become or are the subject of a proceeding that could lead to a Person becoming, as applicable, a Debarred Entity or Debarred
Individual,  an  Excluded  Entity  or  Excluded  Individual  or  a  Convicted  Entity  or  Convicted  Individual  or  added  to  the  FDA’s
Disqualified/Restricted  List,  Harpoon  shall  immediately  notify  AbbVie,  and  AbbVie  shall  have  the  right,  exercisable  upon  written  notice
given by AbbVie to terminate this Agreement.  For purposes of this Agreement, the following definitions shall apply:

A “Debarred Individual” is an individual who has been debarred by the FDA pursuant
to 21 U.S.C. §335a (a) or (b) from providing services in any capacity to a Person that has an approved or pending drug or biological product
application.

(a)

A “Debarred Entity” is a corporation, partnership or association that has been debarred
by the FDA pursuant to 21 U.S.C. §335a (a) or (b) from submitting or assisting in the submission of any Drug Approval Application, or a
subsidiary or affiliate of a Debarred Entity.

(b)

An  “Excluded  Individual”  or  “Excluded  Entity”  is  (A)  an  individual  or  entity,  as
applicable,  who  has  been  excluded,  debarred,  suspended  or  is  otherwise  ineligible  to  participate  in  federal  health  care  programs  such  as
Medicare or Medicaid by the Office of the Inspector General (OIG/HHS) of the U.S. Department of Health and Human Services, or (B) is an
individual  or  entity,  as  applicable,  who  has  been  excluded,  debarred,  suspended  or  is  otherwise  ineligible  to  participate  in  federal
procurement and non-procurement programs, including those produced by the U.S. General Services Administration (GSA).

(c)

- 57 –

 
A  “Convicted  Individual”  or  “Convicted  Entity”  is  an  individual  or  entity,  as
applicable, who has been convicted of a criminal offense that falls within the ambit of 21 U.S.C. §335a (a) or 42 U.S.C. §1320a - 7(a), but
has not yet been excluded, debarred, suspended or otherwise declared ineligible.

(d)

“FDA’s Disqualified/Restricted List” is the list of clinical investigators restricted from
receiving investigational drugs, biologics, or devices if the FDA has determined that the investigators have repeatedly or deliberately failed to
comply with regulatory requirements for studies or have submitted false Information to the study sponsor or the FDA..

(e)

The  inventions  claimed  or  covered  by  the  Existing  Patents  (a)  were  not  conceived,
discovered, developed, or otherwise made in connection with any research activities funded, in whole or in part, by the federal government of
the United States or any agency thereof, and (b) are not a “subject invention” as that term is described in 35 U.S.C. Section 201(f).

10.2.15

10.3

Covenants of Harpoon.  Harpoon covenants to AbbVie as follows:

10.3.1

During  the  Term,  neither  Harpoon  nor  any  of  its  Affiliates  shall  encumber  or  diminish  the
rights granted to AbbVie hereunder with respect to the Harpoon Patents, including by not (a) committing any acts or knowingly permitting
the  occurrence  of  any  omissions  that  would  cause  the  breach  or  termination  of  any  Harpoon  In-License  Agreement,  or  (b)    amending  or
otherwise modifying or permitting to be amended or modified, any Harpoon In-License Agreement, where such amendment or modification
would  adversely  affect  the  rights  granted  to  AbbVie  hereunder.    Harpoon  shall  promptly  provide  AbbVie  with  notice  of  any  alleged,
threatened, or actual breach of any Harpoon In-License Agreement.

10.3.2

At any time following the [***] and prior to the expiration of the Option Period (as[***]), at
AbbVie’s  request,  Harpoon  shall,  at  its  sole  cost  and  expense,  exercise  its  option  to  acquire  the  Commercial  License  [***]  for  Licensed
Products pursuant to [***].  Harpoon shall exercise such Commercial License promptly following written notice of such election by AbbVie
to Harpoon.  For clarity, Harpoon shall not be responsible for any payment of any financial obligations resulting from any agreement AbbVie
elects to enter into with a Third Party in connection with the Manufacture of a Licensed Compound or Licensed Product under [***].  

experience to conduct and to oversee the Initial Development Activities.

10.3.3

Harpoon  and  its  Affiliates  will  employ  Persons  with  appropriate  knowledge,  expertise  and

10.3.4

Harpoon  shall  have  obtained  from  each  of  its  Affiliates,  sublicensees,  employees  and  agents
who  are  participating  in  the  Exploitation  of  the  Licensed  Compounds  or  Licensed  Products  or  who  otherwise  have  access  to  any  AbbVie
Information  or  other  Confidential  Information  of  AbbVie  in  connection  with  activities  under  this  Agreement,  rights  to  any  and  all
Information that arises from or relates to such participation and is necessary or reasonably useful for the Development or Commercialization
of Licensed Compounds or Licensed Products, in each case prior to the performance of or participation in such activities, such that AbbVie
shall, by virtue of this Agreement, receive from Harpoon, without payments beyond those required by Article 6, the licenses and other rights
granted to AbbVie hereunder.

10.4

Covenants of AbbVie.  AbbVie covenants to Harpoon as follows:

AbbVie  shall  have  obtained  from  each  of  its  Affiliates,  Sublicensees,  employees  and  agents
who are participating in the Exploitation of the Licensed Compounds or Licensed Products or who otherwise have access to any Harpoon
Information  or  other  Confidential  Information  of  Harpoon  in  connection  with  activities  under  this  Agreement,  rights  to  any  and  all
Information that arises from 

10.4.1

- 58 –

 
or  relates  to  such  participation  or  access  and  is  necessary  or  reasonably  useful  for  the  Development  or  Commercialization  of  Licensed
Compounds or Licensed Products, in each case prior to the performance of or participation in such activities, such that Harpoon shall, by
virtue of this Agreement, receive from AbbVie, without additional consideration, the licenses specified in Section 5.2.

10.5

DISCLAIMER  OF  WARRANTIES.    EXCEPT  FOR  THE  EXPRESS  WARRANTIES  SET  FORTH
HEREIN,  NEITHER  PARTY  MAKES  ANY  REPRESENTATIONS  OR  GRANTS  ANY  WARRANTIES,  EXPRESS  OR  IMPLIED,
EITHER IN FACT OR BY OPERATION OF LAW, BY STATUTE OR OTHERWISE, AND EACH PARTY SPECIFICALLY DISCLAIMS
ANY OTHER WARRANTIES, WHETHER WRITTEN OR ORAL, OR EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF
QUALITY,  MERCHANTABILITY,  OR  FITNESS  FOR  A  PARTICULAR  USE  OR  PURPOSE  OR  ANY  WARRANTY  AS  TO  THE
VALIDITY  OF  ANY  PATENTS  OR  THE  NON-INFRINGEMENT  OF  ANY  INTELLECTUAL  PROPERTY  RIGHTS  OF  THIRD
PARTIES.

ARTICLE 11
INDEMNITY

11.1

Indemnification of Harpoon.  AbbVie shall indemnify Harpoon, its Affiliates and its and their respective
directors, officers, employees, and agents (the “Harpoon Indemnitees”) and defend and save each of them harmless, from and against any
and all losses, damages, liabilities, penalties, costs, taxes (including penalties and interest) and expenses (including reasonable attorneys’ fees
and expenses) (collectively, “Losses”) in connection with any and all suits, investigations, claims, or demands of Third Parties (collectively,
“Third Party Claims”) incurred by or rendered against the Harpoon Indemnitees arising from or occurring as a result of: [***]

11.2

Indemnification of AbbVie.    Harpoon  shall  indemnify  AbbVie,  its  Affiliates  and  its  and  their  respective
directors, officers, employees, and agents (the “AbbVie Indemnitees”), and defend and save each of them harmless, from and against any
and all Losses in connection with any and all Third Party Claims incurred by or rendered against the AbbVie Indemnitees arising from or
occurring as a result of: [***]

11.3

Notice  of  Claim.    All  indemnification  claims  in  respect  of  a  Party,  its  Affiliates,  or  their  respective
directors, officers, employees and agents shall be made solely by such Party to this Agreement (the “Indemnified Party”).  The Indemnified
Party shall give the indemnifying Party prompt written notice (an “Indemnification Claim Notice”) of any Losses or discovery of fact upon
which such Indemnified Party intends to base a request for indemnification under this Article 11, but in no event shall the indemnifying Party
be liable for any Losses to the extent resulting from any delay in providing such notice.  Each Indemnification Claim Notice must contain a
description of the claim and the nature and amount of such Loss (to the extent 

- 59 –

 
that the nature and amount of such Loss is known at such time).  The Indemnified Party shall furnish promptly to the indemnifying Party
copies of all papers and official documents received in respect of any Losses and Third Party Claims.  

11.4

Control of Defense.

11.4.1

In General.  Subject to the provisions of Sections 7.4 (if applicable), 7.5 and 7.6, at its option,
the indemnifying Party may assume the defense of any Third Party Claim by giving written notice to the Indemnified Party within [***] after
the  indemnifying  Party’s  receipt  of  an  Indemnification  Claim  Notice.    The  assumption  of  the  defense  of  a  Third  Party  Claim  by  the
indemnifying Party shall not be construed as an acknowledgment that the indemnifying Party is liable to indemnify the Indemnified Party in
respect  of  the  Third  Party  Claim,  nor  shall  it  constitute  a  waiver  by  the  indemnifying  Party  of  any  defenses  it  may  assert  against  the
Indemnified Party’s claim for indemnification.  Upon assuming the defense of a Third Party Claim, the indemnifying Party may appoint as
lead  counsel  in  the  defense  of  the  Third  Party  Claim  any  legal  counsel  selected  by  the  indemnifying  Party  which  shall  be  reasonably
acceptable to the Indemnified Party.  In the event the indemnifying Party assumes the defense of a Third Party Claim, the Indemnified Party
shall  promptly  deliver  to  the  indemnifying  Party  all  original  notices  and  documents  (including  court  papers)  received  by  the  Indemnified
Party  in  connection  with  the  Third  Party  Claim.    Should  the  indemnifying  Party  assume  the  defense  of  a  Third  Party  Claim,  except  as
provided in Section 11.4.2, the indemnifying Party shall not be liable to the Indemnified Party for any legal expenses subsequently incurred
by such Indemnified Party in connection with the analysis, defense or settlement of the Third Party Claim unless specifically requested in
writing by the indemnifying Party.  In the event that it is ultimately determined that the indemnifying Party is not obligated to indemnify,
defend  or  hold  harmless  the  Indemnified  Party  from  and  against  the  Third  Party  Claim,  the  Indemnified  Party  shall  reimburse  the
indemnifying Party for any Losses incurred by the indemnifying Party in its defense of the Third Party Claim.

11.4.2

Right to Participate in Defense.  Without limiting Section 11.4.1, any Indemnified Party shall
be entitled to participate in, but not control, the defense of such Third Party Claim and to employ counsel of its choice for such purpose;
provided that such employment shall be at the Indemnified Party’s own expense unless (a) the employment thereof, and the assumption by
the indemnifying Party of such expense, has been specifically authorized by the indemnifying Party in writing, (b) the indemnifying Party has
failed to assume the defense and employ counsel in accordance with Section 11.4.1 (in which case the Indemnified Party shall control the
defense),  or  (c)  the  interests  of  the  Indemnified  Party  and  the  indemnifying  Party  with  respect  to  such  Third  Party  Claim  are  sufficiently
adverse  to  prohibit  the  representation  by  the  same  counsel  of  both  Parties  under  Applicable  Law,  ethical  rules  or  equitable  principles  (in
which case the Indemnifying Party shall control its defense and the Indemnified Party shall control the defense of the Indemnified Party).  

11.4.3

Settlement.  With respect to any Losses relating solely to the payment of money damages in
connection with a Third Party Claim and that shall not result in the Indemnified Party’s becoming subject to injunctive or other relief, and as
to  which  the  indemnifying  Party  shall  have  acknowledged  in  writing  the  obligation  to  indemnify  the  Indemnified  Party  hereunder,  the
indemnifying Party shall have the sole right to consent to the entry of any judgment, enter into any settlement or otherwise dispose of such
Loss, on such terms as the indemnifying Party, in its sole discretion, shall deem appropriate.  With respect to all other Losses in connection
with Third Party Claims, where the indemnifying Party has assumed the defense of the Third Party Claim in accordance with Section 11.4.1,
the indemnifying Party shall have authority to consent to the entry of any judgment, enter into any settlement or otherwise dispose of such
Loss;  provided  that  it  obtains  the  prior  written  consent  of  the  Indemnified  Party  (which  consent  shall  not  be  unreasonably  withheld,
conditioned or delayed).  If the indemnifying Party does not assume and conduct the defense of a Third Party Claim as provided above, the
Indemnified Party may defend against such Third Party Claim.  Regardless of whether the indemnifying Party chooses to defend or prosecute
any Third Party Claim, no Indemnified Party shall admit any liability with respect to, or settle, compromise or dispose of, any Third Party
Claim without 

- 60 –

 
the  prior  written  consent  of  the  indemnifying  Party.    The  indemnifying  Party  shall  not  be  liable  for  any  settlement,  compromise  or  other
disposition of a Loss by an Indemnified Party that is reached without the written consent of the indemnifying Party.

11.4.4

Cooperation.    Regardless  of  whether  the  indemnifying  Party  chooses  to  defend  or  prosecute
any Third Party Claim, the Indemnified Party shall, and shall cause each indemnitee to, cooperate in the defense or prosecution thereof and
shall furnish such records, information and testimony, provide such witnesses and attend such conferences, discovery proceedings, hearings,
trials  and  appeals  as  may  be  reasonably  requested  in  connection  therewith.    Such  cooperation  shall  include  access  [***]  afforded  to  the
indemnifying  Party  to,  and  reasonable  retention  by  the  Indemnified  Party  of,  records  and  information  that  are  reasonably  relevant  to  such
Third  Party  Claim,  and  making  Indemnified  Parties  and  other  employees  and  agents  available  on  a  mutually  convenient  basis  to  provide
additional information and explanation of any material provided hereunder, and the indemnifying Party shall reimburse the Indemnified Party
for all its reasonable out-of-pocket expenses in connection therewith, subject to refund if the Indemnifying Party is ultimately held not to be
obligated to indemnify the Indemnified Party.

11.4.5

Expenses.    Except  as  provided  above,  the  reasonable  and  verifiable  costs  and  expenses,
including fees and disbursements of counsel, incurred by the Indemnified Party in connection with any Third Party Claim shall be reimbursed
on a [***] basis in arrears by the indemnifying Party, without prejudice to the indemnifying Party’s right to contest the Indemnified Party’s
right  to  indemnification  and  subject  to  refund  in  the  event  the  indemnifying  Party  is  ultimately  held  not  to  be  obligated  to  indemnify  the
Indemnified Party.

11.5

Special,  Indirect,  and  Other  Losses.    EXCEPT  (A)  FOR  FRAUD,  WILLFUL  MISCONDUCT  OR
GROSS  NEGLIGENCE,  (B)  FOR  A  PARTY’S  BREACH  OF  ITS  OBLIGATIONS  UNDER  [ARTICLE  9  OR  SECTION  5.8],  (C)  AS
PROVIDED UNDER [***] AND (D) TO THE EXTENT ANY SUCH DAMAGES ARE REQUIRED TO BE PAID TO A THIRD PARTY
AS PART OF A CLAIM FOR WHICH A PARTY PROVIDES INDEMNIFICATION UNDER THIS ARTICLE 11, NEITHER PARTY NOR
ANY  OF  ITS  AFFILIATES  SHALL  BE  LIABLE  FOR  INDIRECT,  INCIDENTAL,  SPECIAL,  EXEMPLARY,  PUNITIVE  OR
CONSEQUENTIAL DAMAGES, INCLUDING LOSS OF PROFITS OR BUSINESS INTERRUPTION, HOWEVER CAUSED AND ON
ANY  THEORY  OF  LIABILITY,  WHETHER  IN  CONTRACT,  TORT,  NEGLIGENCE,  BREACH  OF  STATUTORY  DUTY  OR
OTHERWISE  IN  CONNECTION  WITH  OR  ARISING  IN  ANY  WAY  OUT  OF  THE  TERMS  OF  THIS  AGREEMENT  OR  THE
TRANSACTIONS CONTEMPLATED HEREBY OR THE USE OF THE LICENSED COMPOUNDS OR LICENSED PRODUCTS, EVEN
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

11.6

Insurance.  Each Party shall obtain and carry in full force and effect the minimum insurance requirements
set forth herein.  Such insurance (a) shall be primary insurance with respect to each Party’s own participation under this Agreement, (b) shall
be issued by a recognized insurer rated by A.M. Best “A-VII” (or its equivalent) or better, or an insurer pre-approved in writing by the other
Party, and (c) shall list the other Party as an additional insured under the General Liability Policy.

11.6.1

Types and Minimum Limits.  The types of insurance, and minimum limits shall be:

Compensation laws of the state or states in which the Party has employees in the United States (excluding Puerto Rico).

(a)

Worker’s  Compensation  with  statutory  limits  in  compliance  with  the  Worker’s

(b)

Employer’s Liability coverage with a minimum limit of [***] provided that a Party has

employees in the United States (excluding Puerto Rico). 

- 61 –

 
General  Liability  Insurance  with  a  minimum  limit  of  [***]  and  [***]  in  the
aggregate.    General  Liability  Insurance  shall  include  Clinical  Trial  Insurance.   The  limits  may  be  met  with  a  combination  of  primary  and
commercial umbrella insurance.

(c)

11.6.2

Certificates of Insurance.  Upon request by a Party, the other Party shall provide Certificates
of Insurance evidencing compliance with this Section.  The insurance policies shall be under an occurrence form, but if only a claims-made
form is available to a Party, then such Party shall continue to maintain such insurance after the expiration or termination of this Agreement
for the longer of (a) a period of [***] following termination or expiration of this Agreement in its entirety, or (b) with respect to a particular
Party, [***] by a Party.

the insurance requirements described above.

11.6.3

Self-Insurance.  Notwithstanding the foregoing, AbbVie may self-insure, in whole or in part,

ARTICLE 12
TERM AND TERMINATION

12.1

Term.

Term.  This Agreement shall commence on the Effective Date and, unless earlier terminated in
accordance herewith, shall continue in force and effect until (a) the date of expiration of the last Royalty Term for the last Licensed Product,
or (b) the expiration of the License Option Period and the failure of AbbVie to exercise the License Option (such period, the “Term”).

12.1.1

(but not clause (b)) of Section 12.1.1, the grants in Section 5.1.3 shall become non-exclusive, fully-paid, royalty-free and irrevocable.

12.1.2

Effect of Expiration of the Term.  Following the expiration of the Term pursuant to clause (a)

12.2

Termination for Material Breach.

12.2.1

Material Breach.  If either Party (the “Non-Breaching Party”) believes that the other Party
(the “Breaching Party”) has materially breached one (1) or more of its material obligations under this Agreement, then the Non-Breaching
Party may deliver notice of such material breach to the Breaching Party (a “Default Notice”).  If the Breaching Party does not dispute that it
has committed a material breach of one (1) or more of its material obligations under this Agreement, then if the Breaching Party fails to cure
such breach within ninety (90) days after receipt of the Default Notice, or if such compliance cannot be fully achieved within such ninety-
(90-) day period and the Breaching Party has failed to commence compliance or has failed to use diligent efforts to achieve full compliance
as soon thereafter as is reasonably possible, the Non-Breaching Party may terminate this Agreement upon written notice to the Breaching
Party.  If the Breaching Party disputes that it has materially breached one (1) or more of its material obligations under this Agreement, the
dispute shall be resolved pursuant to Section 13.7.  If, as a result of the application of such dispute resolution procedures, the Breaching Party
is determined to be in material breach of one (1) or more of its material obligations under this Agreement (an “Adverse Ruling”), then if the
Breaching Party fails to complete the actions specified by the Adverse Ruling to cure such material breach within [***] after such ruling, or
if  such  compliance  cannot  be  fully  achieved  within  such  [***]  period  and  the  Breaching  Party  has  failed  to  commence  diligent  efforts  to
achieve full compliance as soon thereafter as is reasonably possible or as prescribed by the Arbitrator, then the Non-Breaching Party may
terminate this Agreement upon written notice to the Breaching Party.

if the material breach and failure to cure contemplated by Section 12.2.1 is 

12.2.2

Material Breach Related to Diligence in a Major Market.  Notwithstanding Section 12.2.1,

- 62 –

 
with respect to AbbVie’s Commercialization diligence obligations under Section 4.2 with respect to any Major Market, [***].

Invocation  of  Material  Breach.    Notwithstanding  the  foregoing,  the  Parties  agree  that
termination  pursuant  to  this  Section 12.2  is  a  remedy  to  be  invoked  only  if  the  breach  is  not  (a)  cured  in  accordance  with  Section 12.2.1
(including the timeframes set forth therein), (b) remedied through the payment of money damages determined in accordance with Section
13.7 or (c) adequately remedied through a combination of (a) and (b).  

12.2.3

Additional Termination Rights by AbbVie.  AbbVie may terminate this Agreement in its entirety, or on a
country  or  other  jurisdiction  -by-country  or  other  jurisdiction  basis,  for  any  or  no  reason,  upon  ninety  (90)  days’  prior  written  notice  to
Harpoon.

12.3

12.4

Termination  for  Insolvency.    In  the  event  that  either  Party  (a)  files  for  protection  under  bankruptcy  or
insolvency  laws,  (b)  makes  an  assignment  for  the  benefit  of  creditors,  (c)  appoints  or  suffers  appointment  of  a  receiver  or  trustee  over
substantially all of its property that is not discharged within [***] after such filing, (d) is a party to any dissolution or liquidation, (e) files a
petition  under  any  bankruptcy  or  insolvency  act  or  has  any  such  petition  filed  against  it  that  is  not  discharged  within  [***]  of  the  filing
thereof, or (f) admits in writing its inability generally to meet its obligations as they fall due in the general course, then the other Party may
terminate this Agreement in its entirety effective immediately upon written notice to such Party.

12.5

Rights in Bankruptcy.   

12.5.1

Applicability  of  11  U.S.C.  §  365(n).    All  rights  and  licenses  (collectively,  the  “Intellectual
Property”) granted under or pursuant to this Agreement, including all rights and licenses to use improvements or enhancements developed
during the Term, are intended to be, and shall otherwise be deemed to be, for purposes of Section 365(n) of the United States Bankruptcy
Code (the “Bankruptcy Code”) or any analogous provisions in any other country or jurisdiction, licenses of rights to “intellectual property”
as  defined  under  Section  101(35A)  of  the  Bankruptcy  Code.    The  Parties  agree  that  the  licensee  of  such  Intellectual  Property  under  this
Agreement  shall  retain  and  may  fully  exercise  all  of  its  rights  and  elections  under  the  Bankruptcy  Code,  including  Section  365(n)  of  the
Bankruptcy  Code,  or  any  analogous  provisions  in  any  other  country  or  jurisdiction.   All  of  the  rights  granted  to  either  Party  under  this
Agreement shall be deemed to exist immediately before the occurrence of any bankruptcy case in which the other Party is the debtor.  

12.5.2

Rights of non-Debtor Party in Bankruptcy.  If a bankruptcy proceeding is commenced by or
against either Party under the Bankruptcy Code or any analogous provisions in any other country or jurisdiction, the non-debtor Party shall be
entitled to a complete duplicate of (or complete access to, as appropriate) any Intellectual Property and all embodiments of such Intellectual
Property, which, if not already in the non-debtor Party’s possession, shall be delivered to the non-debtor Party within [***] of such request;
provided that the debtor Party is excused from its obligation to deliver the Intellectual Property to the extent the debtor Party continues to
perform  all  of  its  obligations  under  this  Agreement  and  the  Agreement  has  not  been  rejected  pursuant  to  the  Bankruptcy  Code  or  any
analogous provision in any other country or jurisdiction.  

12.6

Termination in Entirety.

12.3, or by Harpoon pursuant to Section 12.2.1 or 12.4:

12.6.1

In the event of a termination of this Agreement in its entirety by AbbVie pursuant to Section

(a)

all rights and licenses granted by Harpoon hereunder shall immediately terminate; 

- 63 –

 
(b)

all rights and licenses granted by AbbVie hereunder shall immediately terminate;

subject  to  Section  12.10.2  and  Section    12.7  (solely  following  the  License  Option
Exercise Closing Date), AbbVie shall cease any and all Exploitation of Licensed Compounds and Licensed Products and transfer to Harpoon,
or  destroy  (at  Harpoon’s  sole  election),  copies  of  all  data  and  Information  generated  by  AbbVie  in  connection  with  the  Exploitation  of
Licensed Compounds or Licensed Products, and all rights in such Licensed Compounds and Licensed Products shall revert back to Harpoon;
and

(c)

12.7 shall apply with respect to Licensed Compounds and Licensed Products that revert to Harpoon (the “Harpoon Reversion Products”).

(d)

if such termination occurs following the License Option Exercise Closing Date, Section 

12.6.2

If  AbbVie  terminates  this  Agreement  in  its  entirety  pursuant  to  Section  12.2.1  (subject  to

Section 12.6.3 and Section 12.6.4) or 12.4:

AbbVie shall have no further rights in connection with Licensed Compounds and Licensed Products; and

(a)

all rights and licenses granted by Harpoon hereunder shall immediately terminate, and

(b)

all rights and licenses granted by AbbVie hereunder shall immediately terminate.

12.6.3

Prior to the exercise of the License Option, if AbbVie has the right to terminate this Agreement
in its entirety pursuant to Section 12.2.1 (i.e. by mutual agreement or as may be finally determined by an Adverse Ruling), then within [***]
following the expiration of the relevant cure period, if any, AbbVie may, by written notice to Harpoon, and as its sole and exclusive remedy
in lieu of exercising its right under Section 12.2.1 with respect to such breach, elect to continue this Agreement as modified by this Section
12.6.3, in which case, effective as of the date AbbVie delivers notice of such election to Harpoon:

(a)

(b)

(c)

(d)

(e)

(f)

[***]

[***]

[***]

[***]

[***]

[***]

- 64 –

 
with respect to AbbVie’s rights and obligations following the exercise of the License Option shall apply, provided that [***]; and

(g)

Following the License Exercise Option Closing Date, all provisions of this Agreement

If  the  Post  CSR  Option  Period  expires  without  AbbVie  delivering  a  License  Option
Exercise Notice, then all rights and licenses granted by Harpoon hereunder shall immediately terminate, and AbbVie shall have no further
rights in connection with Licensed Compounds and Licensed Products.

(h)

12.6.4

Following the License Option Exercise Closing Date, if AbbVie has the right to terminate this
Agreement in its entirety pursuant to Section 12.2.1 (i.e. by mutual agreement or as may be finally determined by an Adverse Ruling), then
within  [***]  following  the  expiration  of  the  relevant  cure  period,  if  any,  AbbVie  may,  by  written  notice  to  Harpoon,  and  as  its  sole  and
exclusive remedy in lieu of exercising its right under Section 12.2.1 with respect to such breach, elect to continue this Agreement as modified
by this Section 12.6.4, in which case, effective as of the date AbbVie delivers notice of such election to Harpoon :

(a)

(b)

(c)

[***]

[***]

[***]

(d)

[***]

Agreement in its entirety pursuant to Section 12.4, but elects to retain its rights and licenses pursuant to Section 12.5:

12.6.5

Following the License Option Exercise Closing Date, if AbbVie has the right to terminate this

(a)

(b)

(c)

[***]

[***]

[***]

- 65 –

 
 
(d)

[***].

Reversion of Harpoon Products.  Following the License Option Exercise Closing Date, if this Agreement
terminates in its entirety, except for termination by AbbVie pursuant to Section 12.2.1 or Section 12.4, the following shall apply with respect
to Harpoon Reversion Products.  

12.7

12.7.1

At Harpoon’s sole election by written notice to AbbVie, AbbVie shall grant, and hereby grants
to Harpoon, effective as of the effective date of termination, [***] (the “AbbVie Reversion IP”); provided that the foregoing license shall
exclude (1) any license or other rights with respect to any active ingredient that is not a Licensed Compound and (2) any license or other
rights with respect to any other Patents or Know-How owned or controlled by AbbVie or any of its Affiliates.  The foregoing license under
the AbbVie Reversion IP shall be payable on a country-by-country basis and [***] (applied mutatis mutandis to Harpoon) by Harpoon, its
Affiliates or sublicensees of Harpoon Reversion Products, beginning [***].

that was transferred by Harpoon to AbbVie with respect to each Harpoon Reversion Product.

12.7.2

AbbVie shall [***], within a reasonable time following the effective date of termination,[***]

prior to reversion of such Harpoon Reversion Products.

12.7.3

At  Harpoon’s  request,  AbbVie  shall  [***]  in  connection  with  Harpoon  Reversion  Products

or Control.

12.7.4

AbbVie shall [***] pertaining to the applicable Harpoon Reversion Products in its possession

period in which AbbVie is [***] for such Licensed Product, AbbVie shall [***] 

12.7.5

With respect to any Licensed Product that becomes a Harpoon Reversion Product during any

- 66 –

 
[***], provided that Harpoon [***] the foregoing obligations.

12.7.6
Product becoming a Harpoon Reversion Product, AbbVie shall [***]

If  a  [***],  AbbVie  shall  [***].  Additionally,  upon  any  Licensed  Compound  or  Licensed

To  the  extent  that  AbbVie  [***]  for  the  Commercialization  of  a  Harpoon  Reversion  Product
[***], Harpoon shall have the right to [***]. Harpoon shall exercise such right by written notice to AbbVie within [***] after such Licensed
Compound or Licensed Product becomes a Harpoon Reversion Product.

12.7.7

connection with Harpoon’s rights under this Section 12.7.

12.7.8

AbbVie  shall  [***],  as  may  be  necessary  under,  or  as  Harpoon  may  reasonably  request  in

12.8

Termination of Terminated Territory.  In the event of a termination of this Agreement with respect to a
country or other jurisdiction by AbbVie pursuant to Section 12.3 or with respect to a Terminated Territory by Harpoon pursuant to Section
12.2.2  (but  not  in  the  case  of  any  termination  of  this  Agreement  in  its  entirety),  the  term  “Territory”  shall  be  automatically  amended  to
exclude the Terminated Territory and all rights and licenses granted by Harpoon hereunder (a) shall automatically be deemed to be amended
to exclude, if applicable, the right to market, promote, detail, distribute, import, sell, offer for sale, file any Drug Approval Application for, or
seek any Regulatory Approval for Licensed Compound or Licensed Products in such Terminated Territory, and (b) shall otherwise survive
and continue in effect in such Terminated Territory solely for the purpose of furthering any Commercialization of the Licensed Compounds
or Licensed Products in the Territory other than the Terminated Territory or any Development or Manufacturing in support thereof.

Remedies.    Except  as  otherwise  expressly  provided  herein,  termination  of  this  Agreement  (either  in  its
entirety  or  with  respect  to  one  (1)  or  more  country(ies)  or  other  jurisdiction(s))  in  accordance  with  the  provisions  hereof  shall  not  limit
remedies that may otherwise be available in law or equity.

12.9

12.10

Accrued Rights; Surviving Obligations.

12.10.1

Termination or expiration of this Agreement (either in its entirety or with respect to one (1) or
more country(ies) or other jurisdiction(s)) for any reason shall be without prejudice to any rights that shall have accrued to the benefit of a
Party  prior  to  such  termination  or  expiration.    Such  termination  or  expiration  shall  not  relieve  a  Party  from  obligations  that  are  expressly
indicated to survive the termination or expiration of this Agreement.  Without limiting the foregoing, Sections 3.6 [***]; 3.8.5 (solely for the
purposes, and in accordance with the time periods, set forth therein); 4.6.1 (with respect to any amounts incurred prior to the effective date of
termination and subject to reimbursement by AbbVie); 6.2 through 6.6 (with respect to payments for milestone events or Net Sales occurring
prior to the effective date of termination); Sections 6.7 through 6.13; Sections 7.1.1 through 7.1.4 (with respect to Patents and Know-How
conceived, discovered, developed, or otherwise made prior to expiration or termination of this 

- 67 –

 
Agreement); Section 7.9 (with respect to information exchanged prior to the effective date of termination); Sections 11.1 through 11.5; 12.1.2
and  the  grants  referenced  therein  (with  respect  to  expiration,  but  not  termination,  of  this  Agreement),  12.5  through  12.8  (with  respect  to
termination, but not expiration, of this Agreement and in accordance with the time periods set forth therein), 12.10, 13.2, 13.3 through 13.13,
and 13.15 through 13.20 of this Agreement shall survive the termination or expiration of this Agreement for any reason (unless the reason is
expressly  limited  therein),  and  Articles  1  (to  the  extent  used  in  other  surviving  provisions)  and  9  of  this  Agreement  shall  survive  the
termination or expiration of this Agreement for any reason.  If this Agreement is terminated with respect to the Terminated Territory but not
in  its  entirety,  then  following  such  termination  the  foregoing  provisions  of  this  Agreement  shall  remain  in  effect  with  respect  to  the
Terminated Territory (to the extent they would survive and apply in the event the Agreement expires or is terminated in its entirety), and all
provisions not surviving in accordance with the foregoing shall terminate upon termination of this Agreement with respect to the Terminated
Territory and be of no further force and effect (and, for purposes of clarity, all provisions of this Agreement shall remain in effect with respect
to all countries in the Territory other than the Terminated Territory).

12.10.2

If AbbVie terminates this Agreement with respect to a country or other jurisdiction, or in its
entirety pursuant to Section 12.3, AbbVie shall have the right for at least [***] and no more than [***], which period shall be determined by
Harpoon  in  its  sole  discretion,  after  the  effective  date  of  such  termination  with  respect  to  such  country  or  other  jurisdiction  to  sell  or
otherwise dispose of all Licensed Compound or Licensed Product then in its inventory and any in-progress inventory, in each case that is
intended  for  sale  or  disposition  in  such  country  or  other  jurisdiction,  as  though  this  Agreement  had  not  terminated  with  respect  to  such
country  or  other  jurisdiction,  and  such  sale  or  disposition  shall  not  constitute  infringement  of  Harpoon’s  or  its  Affiliates’  Patent  or  other
intellectual property or other proprietary rights.  Within [***] from the expiration from this period, AbbVie shall furnish Harpoon a statement
showing the quantities of Licensed Products then in AbbVie’s inventory and any in-progress inventory.  For purposes of clarity, AbbVie shall
continue to make payments thereon as provided in Article 6 (as if this Agreement had not terminated with respect to such Major Market or
country or other jurisdiction).

ARTICLE 13
MISCELLANEOUS

13.1

Force Majeure.  Neither Party shall be held liable or responsible to the other Party or be deemed to have
defaulted under or breached this Agreement for failure or delay in fulfilling or performing any term of this Agreement when such failure or
delay  is  caused  by  or  results  from  events  beyond  the  reasonable  control  of  the  non-performing  Party,  including  fires,  floods,  earthquakes,
hurricanes, embargoes, shortages, epidemics, quarantines, war, acts of war (whether war be declared or not), terrorist acts, insurrections, riots,
civil commotion, acts of God or acts, omissions or delays in acting by any governmental authority (except to the extent such delay results
from the breach by the non-performing Party or any of its Affiliates of any term or condition of this Agreement).  The non-performing Party
shall notify the other Party of such force majeure within [***] after such occurrence by giving written notice to the other Party stating the
nature of the event, its anticipated duration, and any action being taken to avoid or minimize its effect.  The suspension of performance shall
be of no greater scope and no longer duration than is necessary and the non-performing Party shall use commercially reasonable efforts to
remedy its inability to perform.

13.2

Change in Control of Harpoon.

of Harpoon or Acquisition by Harpoon within [***] following the closing date of such transaction.

13.2.1

Harpoon (or its successor) shall provide AbbVie with written notice of any Change in Control

13.2.2

In the event of [***] 

- 68 –

 
13.3

Export Control.  This Agreement is made subject to any restrictions concerning the export of products or
technical information from the United States or other countries that may be imposed on the Parties from time to time.  Each Party agrees that
it will not export, directly or indirectly, any technical information acquired from the other Party under this Agreement or any products using
such technical information to a location or in a manner that at the time of export requires an export license or other governmental approval,
without first obtaining the written consent to do so from the appropriate agency or other governmental entity in accordance with Applicable
Law.

13.4

Assignment.  

13.4.1

Without  the  prior  written  consent  of  the  other  Party,  such  consent  not  to  be  unreasonably
withheld,  conditioned,  or  delayed,  neither  Party  shall  sell,  transfer,  assign,  delegate,  pledge,  or  otherwise  dispose  of,  whether  voluntarily,
involuntarily, by operation of law or otherwise, this Agreement or any of its rights or duties hereunder; provided that either Party may make
such an assignment without the other Party’s consent to its Affiliate or to a successor, whether in a merger, sale of stock, sale of assets or any
other transaction, of the business to which this Agreement relates.  With respect to an assignment to an Affiliate, the assigning Party shall
remain responsible for the performance by such Affiliate of the rights and obligations hereunder.  Any attempted assignment or delegation in
violation of this Section 13.4 shall be void and of no effect.  All validly assigned and delegated rights and obligations of the Parties hereunder
shall  be  binding  upon  and  inure  to  the  benefit  of  and  be  enforceable  by  and  against  the  successors  and  permitted  assigns  of  Harpoon  or
AbbVie,  as  the  case  may  be.    The  permitted  assignee  or  transferee  shall  assume  all  obligations  of  its  assignor  or  transferor  under  this
Agreement.  Without limiting the foregoing, the grant of rights set forth in this Agreement shall be binding upon any successor or permitted
assignee of Harpoon, and the obligations of AbbVie, including the payment obligations, shall run in favor of any such successor or permitted
assignee of Harpoon’s benefits under this Agreement.

13.4.2

[***]

- 69 –

 
13.5

Severability.  If any provision of this Agreement is held to be illegal, invalid, or unenforceable under any
present  or  future  law,  and  if  the  rights  or  obligations  of  either  Party  under  this  Agreement  will  not  be  materially  and  adversely  affected
thereby,  (a)  such  provision  shall  be  fully  severable,  (b)  this  Agreement  shall  be  construed  and  enforced  as  if  such  illegal,  invalid,  or
unenforceable  provision  had  never  comprised  a  part  hereof,  (c)  the  remaining  provisions  of  this  Agreement  shall  remain  in  full  force  and
effect and shall not be affected by the illegal, invalid, or unenforceable provision or by its severance herefrom, and (d) in lieu of such illegal,
invalid, or unenforceable provision, there shall be added automatically as a part of this Agreement a legal, valid, and enforceable provision as
similar in terms to such illegal, invalid, or unenforceable provision as may be possible and reasonably acceptable to the Parties.  To the fullest
extent permitted by Applicable Law, each Party hereby waives any provision of law that would render any provision hereof illegal, invalid, or
unenforceable in any respect.

13.6

Governing Law, Jurisdiction and Service.

13.6.1

Governing  Law.    This  Agreement  or  the  performance,  enforcement,  breach  or  termination
hereof shall be interpreted, governed by and construed in accordance with the laws of the State of Delaware, United States, excluding any
conflicts or choice of law rule or principle that might otherwise refer construction or interpretation of this Agreement to the substantive law
of  another  jurisdiction;  provided  that  all  questions  concerning  (a)  inventorship  of  Patents  under  this  Agreement  shall  be  determined  in
accordance with Section 7.1.3 and (b) the construction or effect of Patents shall be determined in accordance with the laws of the country or
other jurisdiction in which the particular Patent has been filed or granted, as the case may be.  The Parties agree to exclude the application to
this Agreement of the United Nations Convention on Contracts for the International Sale of Goods.

Service.  Each Party further agrees that service of any process, summons, notice or document
by registered mail to its address set forth in Section 13.8.2 shall be effective service of process for any action, suit, or proceeding brought
against it under this Agreement in any such court.

13.6.2

13.7

Dispute Resolution.  Except for disputes resolved by the procedures set forth in Sections 2.2.3, 3.1.2, 6.12
or 13.11, if a dispute arises between the Parties in connection with or relating to this Agreement, including the determination of the scope or
applicability  of  this  Section  13.7  and  the  agreement  to  arbitrate,  or  any  document  or  instrument  delivered  in  connection  herewith  (a
“Dispute”), it shall be resolved pursuant to this Section 13.7.

13.7.1

General.   Any  Dispute  shall  first  be  referred  to  the  Senior  Officers  of  the  Parties,  who  shall
confer  in  good  faith  on  the  resolution  of  the  issue.   Any  final  decision  mutually  agreed  to  by  the  Senior  Officers  shall  be  conclusive  and
binding on the Parties.  If the Senior Officers are not able to agree on the resolution of any such issue within [***] (or such other period of
time  as  mutually  agreed  by  the  Senior  Officers)  after  such  issue  was  first  referred  to  them,  then,  except  as  otherwise  set  forth  in  Section
13.7.2, either Party may, by written notice to the other Party, elect to initiate an arbitration proceeding pursuant to the procedures set forth in
Section 13.7.3, which shall fully and finally settle the Dispute.  

13.7.2

Intellectual  Property  Disputes.    In  the  event  that  a  Dispute  arises  with  respect  the  validity,
enforceability,  or  patentability  of  any  Patent,  Trademark  or  other  intellectual  property  rights,  and  such  Dispute  cannot  be  resolved  in
accordance  with  Section  13.7.1,  unless  otherwise  agreed  by  the  Parties  in  writing,  such  Dispute  shall  not  be  submitted  to  an  arbitration
proceeding  in  accordance  with  Section  13.7.3  and  instead,  either  Party  may  initiate  litigation  in  a  court  of  competent  jurisdiction,
notwithstanding Section 13.6, in any country or other jurisdiction in which such rights apply.  In case of a Dispute between the Parties with
respect to inventorship, the Parties shall jointly select a patent attorney registered before the United States Patent and Trademark Office and
submit such Dispute to the mutually-selected patent attorney for resolution under the United States patent law.  The decision of such patent
attorney with respect to inventorship shall be final, and the Parties agree to be bound by the decision and share equally the expenses of such
patent attorney.

- 70 –

 
procedures set forth in Schedule 13.7.3.

13.7.3

Arbitration.  Any arbitration proceeding under this Agreement shall take place pursuant to the

breach of its material obligations hereunder shall specify a (nonexclusive) set of actions to be taken to cure such material breach, if feasible.

13.7.4

Adverse Ruling.  Any determination pursuant to this Section 13.7  that  a  Party  is  in  material

Interim Relief.  Notwithstanding anything herein to the contrary, nothing in this Section 13.7
shall preclude either Party from seeking interim or provisional relief, including a temporary restraining order, preliminary injunction or other
interim  equitable  relief  concerning  a  Dispute,  if  necessary  to  protect  the  interests  of  such  Party.    This  Section  shall  be  specifically
enforceable.

13.7.5

13.8

Notices.

13.8.1

Notice  Requirements.    Any  notice,  request,  demand,  waiver,  consent,  approval,  or  other
communication permitted or required under this Agreement shall be in writing, shall refer specifically to this Agreement and shall be deemed
given only if (a) delivered by hand, (b) sent by facsimile transmission (with transmission confirmed), or (c) by internationally recognized
overnight delivery service that maintains records of delivery, addressed to the Parties at their respective addresses specified in Section 13.8.2
or to such other address as the Party to whom notice is to be given may have provided to the other Party in accordance with this Section
13.8.1.    Such  notice  shall  be  deemed  to  have  been  given  as  of  the  date  delivered  by  hand  or  transmitted  by  facsimile  (with  transmission
confirmed) or on the [***] (at the place of delivery) after deposit with an internationally recognized overnight delivery service.  Any notice
delivered by facsimile shall be confirmed by a hard copy delivered as soon as practicable thereafter.  This Section 13.8.1 is not intended to
govern  the  day-to-day  business  communications  necessary  between  the  Parties  in  performing  their  obligations  under  the  terms  of  this
Agreement.

13.8.2

Address for Notice.

If to AbbVie, to:

AbbVie Biotechnology LTD
c/o Conyers, Dill & Pearman,
Clarendon House,
2 Church Street,
Hamilton HM 11 Bermuda

with a copy (which shall not constitute notice) to:

AbbVie Inc.
1 North Waukegan Road
North Chicago, Illinois 60064 United States
Attention: [***]
Facsimile: [***]

If to Harpoon, to:

Harpoon Therapeutics, Inc.
131 Oyster Point Blvd, Suite 300
South San Francisco, CA 94080
Attention: [***]

- 71 –

 
 
 
 
with a copy (which shall not constitute notice) to:

Cooley LLP
3175 Hanover Street
Palo Alto, CA 94304
Attention:  [***]
Email: [***]

13.9

Entire Agreement; Amendments.  This Agreement, together with the Schedules attached hereto, sets forth
and constitutes the entire agreement and understanding between the Parties with respect to the subject matter hereof and all prior agreements,
understandings,  promises,  and  representations,  whether  written  or  oral,  with  respect  thereto  are  superseded  hereby  (including  that  certain
Mutual  Confidentiality  Disclosure  Agreement  between  the  Parties  or  their  respective  Affiliates  dated  [***]  (the  “Prior  NDA”).    The
foregoing shall not be interpreted as a waiver of any remedies available to either Party as a result of any breach, prior to the Effective Date,
by the other Party (or its Affiliates) of its obligations under the Prior NDA.  Each Party confirms that it is not relying on any representations
or warranties of the other Party except as specifically set forth in this Agreement.  No amendment, modification, release, or discharge with
respect to this Agreement shall be binding upon the Parties unless in writing and duly executed by authorized representatives of both Parties.

13.10

English  Language.        This  Agreement  shall  be  written  and  executed  in,  and  all  other  communications
under or in connection with this Agreement shall be in, the English language.  Any translation into any other language shall not be an official
version thereof, and in the event of any conflict in interpretation between the English version and such translation, the English version shall
control.

13.11

Equitable Relief.  Each Party acknowledges and agrees that the restrictions set forth in Section 5.8  and
Articles 7 and 9 are reasonable and necessary to protect the legitimate interests of the other Party and that such other Party would not have
entered into this Agreement in the absence of such restrictions, and that any breach or threatened breach of any provision of such Section or
Articles may result in irreparable injury to such other Party for which there may be no adequate remedy at law.  In the event of a breach or
threatened  breach  of  any  provision  of  such  Section  or  Articles,  the  non-breaching  Party  shall  be  authorized  and  entitled  to  seek  from  any
court of competent jurisdiction injunctive relief, whether preliminary or permanent, specific performance, and an equitable accounting of all
earnings, profits, and other benefits arising from such breach, which rights shall be cumulative and in addition to any other rights or remedies
to which such non-breaching Party may be entitled in law or equity.  Both Parties agree to waive any requirement that the other (a) post a
bond or other security as a condition for obtaining any such relief, and (b) show irreparable harm, balancing of harms, consideration of the
public interest, or inadequacy of monetary damages as a remedy.  Nothing in this Section 13.11 is intended, or should be construed, to limit
either Party’s right to equitable relief or any other remedy for a breach of any other provision of this Agreement.

13.12

Waiver and Non-Exclusion of Remedies.  Any term or condition of this Agreement may be waived at
any time by the Party that is entitled to the benefit thereof, but no such waiver shall be effective unless set forth in a written instrument duly
executed by or on behalf of the Party waiving such term or condition.  The waiver by either Party hereto of any right hereunder or of the
failure to perform or of a breach by the other Party shall not be deemed a waiver of any other right hereunder or of any other breach or failure
by such other Party whether of a similar nature or otherwise.  The rights and remedies provided herein are cumulative and do not exclude any
other right or remedy provided by Applicable Law or otherwise available except as expressly set forth herein.

No Benefit to Third Parties.  Except as provided in Article 11, covenants and agreements set forth in this
Agreement  are  for  the  sole  benefit  of  the  Parties  hereto  and  their  successors  and  permitted  assigns,  and  they  shall  not  be  construed  as
conferring any rights on any other Persons.

13.13

- 72 –

 
 
 
13.14

Further  Assurance.    Each  Party  shall  duly  execute  and  deliver,  or  cause  to  be  duly  executed  and
delivered,  such  further  instruments  and  do  and  cause  to  be  done  such  further  acts  and  things,  including  the  filing  of  such  assignments,
agreements,  documents,  and  instruments,  as  may  be  necessary  or  as  the  other  Party  may  reasonably  request  in  connection  with  this
Agreement or to carry out more effectively the provisions and purposes hereof, or to better assure and confirm unto such other Party its rights
and remedies under this Agreement.

13.15

Relationship of the Parties.  It is expressly agreed that Harpoon, on the one hand, and AbbVie, on the
other hand, shall be independent contractors and that the relationship between the Parties shall not constitute a partnership, joint venture, or
agency, including for all tax purposes.  Further, the Parties (and any successor, assignee, transferee, or Affiliate of a Party) shall not treat or
report the relationship between the Parties arising under this Agreement as a partnership for United States tax purposes, without the prior
written consent of the other Party unless required by a final “determination” as defined in Section 1313 of the United States Internal Revenue
Code  of  1986,  as  amended.    Neither  Harpoon,  on  the  one  hand,  nor  AbbVie,  on  the  other  hand,  shall  have  the  authority  to  make  any
statements, representations, or commitments of any kind, or to take any action, which shall be binding on the other, without the prior written
consent of the other Party to do so.  All persons employed by a Party shall be employees of such Party and not of the other Party and all costs
and obligations incurred by reason of any such employment shall be for the account and expense of such Party.  

13.16

Performance by Affiliates.  AbbVie may use one (1) or more of its Affiliates to perform its obligations
and duties hereunder and such AbbVie Affiliates are expressly granted certain rights herein; provided that each such Affiliate shall be bound
by the corresponding obligations of AbbVie and, subject to an assignment to such Affiliate pursuant to Section 13.4, AbbVie shall remain
liable hereunder for the prompt payment and performance of all their respective obligations hereunder.

13.17

Counterparts; Facsimile Execution.  This Agreement may be executed in two (2) counterparts, each of
which  shall  be  deemed  an  original,  but  all  of  which  together  shall  constitute  one  (1)  and  the  same  instrument.    This  Agreement  may  be
executed by facsimile or electronically transmitted signatures and such signatures shall be deemed to bind each Party hereto as if they were
original signatures.

13.18

References.    Unless  otherwise  specified,  (a)  references  in  this  Agreement  to  any  Article,  Section  or
Schedule  shall  mean  references  to  such  Article,  Section  or  Schedule  of  this  Agreement,  (b)  references  in  any  Section  to  any  clause  are
references to such clause of such Section, and (c) references to any agreement, instrument, or other document in this Agreement refer to such
agreement, instrument, or other document as originally executed or, if subsequently amended, replaced, or supplemented from time to time,
as so amended, replaced, or supplemented and in effect at the relevant time of reference thereto.  

13.19

Schedules.    In  the  event  of  any  inconsistencies  between  this  Agreement  and  any  schedules  or  other

attachments hereto, the terms of this Agreement shall control.

13.20

Construction.  Except where the context otherwise requires, wherever used, the singular shall include the
plural,  the  plural  the  singular,  the  use  of  any  gender  shall  be  applicable  to  all  genders  and  the  word  “or”  is  used  in  the  inclusive  sense
(and/or).    Whenever  this  Agreement  refers  to  a  number  of  days,  unless  otherwise  specified,  such  number  refers  to  calendar  days.    The
captions of this Agreement are for convenience of reference only and in no way define, describe, extend, or limit the scope or intent of this
Agreement or the intent of any provision contained in this Agreement.  The term “including,” “include,” or “includes” as used herein shall
mean  “including,  but  not  limited  to,”  and  shall  not  limit  the  generality  of  any  description  preceding  such  term.    The  language  of  this
Agreement shall be deemed to be the language mutually chosen by the Parties and no rule of strict construction shall be applied against either
Party hereto.  Each Party represents that it has been represented by legal counsel in connection with this Agreement and acknowledges that it
has participated in the drafting hereof.  In interpreting and applying the terms and provisions of this 

- 73 –

 
Agreement, the Parties agree that no presumption will apply against the Party which drafted such terms and provisions.

[SIGNATURE PAGE FOLLOWS]

- 74 –

 
 
 
THIS AGREEMENT IS EXECUTED by the authorized representatives of the Parties as of the Effective Date.

HARPOON THERAPEUTICS, INC.

ABBVIE BIOTECHNOLOGY LTD

By: /s/ Gerald McMahon

Name: Gerald McMahon

Title: President and CEO

By: /s/ Robert Michael

Name: Robert Michael

Title: Director

[SIGNATURE PAGE TO DEVELOPMENT AND OPTION AGREEMENT]

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Schedule 1.84

Initial Development Plan

[***]

 
 
 
 
 
Schedule 1.99

Licensed Compound

[***]

 
 
 
 
 
Schedule 3.7

Pre-Approved Third Party Providers

[***]

 
 
 
 
Schedule 10.2

Disclosure Schedules

[***]

 
 
 
Schedule 10.2.1

Existing Patents

[***]

 
 
 
 
 
 
 
Schedule 13.7.3

Arbitration

[***]

 
 
 
Confidential

Exhibit 10.19

EXECUTION COPY

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS BOTH NOT MATERIAL AND WOULD BE COMPETITIVELY HARMFUL IF
PUBLICLY DISCLOSED.

SECOND AMENDED AND RESTATED ASSIGNMENT AND LICENSE AGREEMENT

This  Second  Amended  and  Restated  Assignment  and  License  Agreement  (this  “Agreement”)  is  entered  into  as  of
December 20, 2019 (the “Second Amendment Date”),  by  and  between  Werewolf  Therapeutics,  Inc.,  a  Delaware  corporation,
with  a  place  of  business  at  1030  Massachusetts  Avenue,  2nd  Floor,  Cambridge,  MA  02138  (“Werewolf”),  and  Harpoon
Therapeutics, Inc., a Delaware corporation with a place of business at 4000 Shoreline Court, Suite 250, South San Francisco, CA
94080 (“Harpoon”).

RECITALS

Harpoon and Werewolf were parties to that certain Assignment and License Agreement (the “Original Agreement”)
dated March 19, 2018 (the “Effective Date”) and are parties to that certain First Amended and Restated Assignment and License
Agreement (the “First Amended and Restated Agreement”) dated October 19, 2018, which previously amended and restated
the Original Agreement in its entirety; and

Harpoon and Werewolf seek to amend and restate the First Amended and Restated Agreement in its entirety as set forth

herein;

follows:

Now, therefore, in consideration of the premises and the mutual covenants contained herein, the parties hereby agree as

1.

Definitions.

As used in this Agreement, the following capitalized terms shall have the meanings indicated:

1.1

“Affiliate”  means  any  person  or  entity  directly  or  indirectly  controlled  by,  controlling  or  under  common
control with a party. A person or entity is deemed to be in “control” if it: (a) owns fifty percent (50%) (or such lesser percentage
which is the maximum allowed to be owned by a foreign entity or investor in a particular jurisdiction) or more of the outstanding
voting stock or other ownership interest of the other entity, or (b) possesses the power to (i) elect, appoint, direct or remove fifty
percent (50%) or more of the members of the governing body of the entity or (ii) otherwise direct or cause the direction of the
management or policies of the entity by contract, law or otherwise. Notwithstanding anything to the contrary in this Agreement,
Werewolf and Harpoon shall not be deemed to be Affiliates of each other for purposes of this Agreement.

1.2

“Control”  means,  with  respect  to  any  patent  or  patent  application,  the  possession  of  the  right,  whether
directly or indirectly, and whether by ownership, license or otherwise (other than by operation of the license or other grants set
forth in this Agreement), to grant a license, sublicense or other right to or under such patent or patent application as provided for
in this

 
 
 
 
 
 
 
 
Agreement without violating the terms of, or incurring any royalty or other expense under, any agreement or other arrangement
with any third party.

1.3

“Covered Products” means Harpoon Licensed Patent Covered Products and/or Harpoon Disclosing Patent

Covered Products, as the context requires.

1.4

“[***]” means [***].

1.5

“[***] Patent” is any patent or patent application of which the applicable party obtains Control on or before
the  first  anniversary  of  the  Second  Amendment  Date  that  is  [***].  The  [***]  Patents  do  not  include  [***].  For  clarity,  [***]
Patents exclude patents and patent applications directed to inventions or discoveries developed or purchased independently by an
acquirer of the applicable party without reference to or reliance upon any of such party’s Confidential Information. [***] Patents
shall be set forth on Exhibit 1.5 attached hereto, which may be updated from time to time upon written notice from the applicable
party,  provided,  however  that  failure  to  include  any  [***]  Patent  on  Exhibit  1.5  shall  not  affect  whether  or  not  an  applicable
patent or patent application is a [***] Patent.

1.6

“[***] Product” means any product [***], the manufacture, use or sale of which would, but for the license

under Section 2.2.1, infringe a Valid Claim of the other party’s [***] Patent.

1.7

“Harpoon Assigned Patents” means: (a) the patent applications listed in Exhibit 1.7 attached hereto; (b) all
patent  applications  that  claim  priority  to  any  patent  application  referenced  in  the  foregoing  clause  (a)  that  are  filed  in  any
jurisdiction;(c) all patents issuing on the patent applications referenced in the foregoing clauses (a) and (b); and (d) all reissues
and extensions of any of the patents referenced in the foregoing clause (c).

1.8

“Harpoon Disclosing Patents” means: (a) the patent applications listed in Exhibit 1.8 attached hereto; (b)
any other patent applications filed by Harpoon from [***] to [***], including but not limited to [***]; (c) all patent applications
that claim priority to any patent application referenced in the foregoing clause (b) that are filed in any jurisdiction; (d) all patents
issuing on the patent applications referenced in the foregoing clauses (a) through (c); and (e) all reissues and extensions of any of
the patents referenced in the foregoing clause (d).  Any patent assigned to Werewolf pursuant to Section 3.5 is also deemed to be
a Harpoon Disclosing Patent for purposes of Sections 1.11, 1.21, 4.5.3 and 4.5.4.

1.9

“Harpoon Licensed Patents” means: (a) the patent applications listed in Exhibit 1.9 attached hereto; (b) all
patent  applications  that  claim  priority  to  any  patent  application  referenced  in  the  foregoing  clause  (a)  that  are  filed  in  any
jurisdiction; (c) all patents issuing on the patent applications referenced in the foregoing clauses (a) and (b); and (d) all reissues
and extensions of any of the patents referenced in the foregoing clause (c).

1.10

“Harpoon Licensed Patent Covered Product” means any product, the manufacture, use or sale of which

would, but for the license under Section 2.1.1(a), infringe a Valid Claim of the Harpoon Licensed Patents.

- 2 -

 
 
 
1.11

“Harpoon Disclosing Patent Covered Product” means any product, the manufacture, use or sale of which

would, but for the license under Section 2.1.1(b), infringe a Valid Claim of the Harpoon Disclosing Patents.

1.12

1.13

1.14

“Harpoon Subject Matter” means [***].

“huSA” means human serum albumin.

“Licensed Field” means [***].

1.15

“Licensed Sequence” means any amino acid sequence for a polypeptide binding to huSA that is disclosed
or claimed in a Harpoon Licensed Patent, including any such sequence that is used in any of Harpoon’s product candidates under
development as of the Effective Date.

1.16

“Net Sales” means the gross amount invoiced by Werewolf and its Affiliates and licensees (each, a “Selling
Party”) for the sale, transfer or other disposition of applicable Covered Products less the following deductions (in each case, to
the extent actually incurred, allowed, paid, accrued or allocated with respect to such sale, transfer or disposition): (a) normal and
customary trade, quantity and cash discounts; (b) rebates and chargebacks; (c) credits or allowances for returns, rejections and
billing errors; (d) sales taxes, value added taxes or similar taxes, including duties or other governmental charges, imposed on the
sale of applicable Covered Products to third parties, to the extent included in the invoice price and not reimbursable, refundable
or creditable to the Selling Party; and (e) prepaid freight, insurance and handling fees to the extent included in the invoice price,
in each case (clauses (a) through (e)) as determined from books and records of the Selling Party maintained in accordance with
GAAP. Sales of applicable Covered Products between or among Werewolf and its Affiliates and licensees shall be excluded from
the computation of Net Sales if such sales are not intended for end use, but Net Sales shall include the subsequent final sales to
third parties by such Affiliates and licensees. If a sale, transfer or other disposition with respect to applicable Covered Products
involves consideration other than cash or is not at arm’s length, then the Net Sales from such sale, transfer or other disposition
shall be calculated based upon the arm’s length fair market value of the applicable Covered Product, which generally shall mean
the Selling Party’s average sales price for the quarter in the country where such sale took place.

1.17

“Period of Collaboration”  means  the  period  starting  on  the  Second  Amendment  Date  and  ending  [***]

thereafter.

1.18

“Territory” means worldwide.

1.19

“Werewolf Assigned Patents” means: (a) the patent applications listed in Exhibit 1.19 attached hereto; (b)
all  patent  applications  that  claim  priority  to  any  patent  application  referenced  in  the  foregoing  clause  (a)  that  are  filed  in  any
jurisdiction; (c) all patents issuing on the patent applications referenced in the foregoing clauses (a) and (b); and (d) all reissues
and extensions of any of the patents referenced in the foregoing clause (c).

1.20

“Werewolf Subject Matter” means [***].

- 3 -

 
 
 
1.21

“Valid  Claim”  means:  (a)  a  claim  of  a  Harpoon  Licensed  Patent  or  a  Harpoon  Disclosing  Patent,  as
applicable,  that  has  not  expired,  been  cancelled  or  been  held  unenforceable  or  invalid  by  an  agency  or  a  court  of  competent
jurisdiction  without  possibility  of  appeal,  and  that  has  not  been  admitted  to  be  invalid  or  unenforceable  through  reissue,
disclaimer or otherwise, or (b) a claim of a pending Harpoon Licensed Patent or Harpoon Disclosing Patent, as applicable, that
has not been withdrawn, abandoned or finally rejected without possibility of appeal or re-filing, provided that a claim of a patent
application  pending  for  more  than  [***] from  the  date  of  first  examination  thereof  shall  thereupon  cease  to  be  a  Valid  Claim
unless and until such claim subsequently issues.

2.

License; Assignment.

2.1

Licenses.

2.1.1

License Grants. Subject to the terms and conditions set forth in this Agreement, Harpoon hereby
grants  to  Werewolf:  (a)  a  non-exclusive,  royalty-bearing,  sublicenseable  (subject  to  Section  2.1.2)  license  under  the  Harpoon
Licensed Patents solely to make, have made, use, sell, offer for sale and import Harpoon Licensed Patent Covered Products in the
Licensed Field in the Territory; and (b) an exclusive (even as to Harpoon), irrevocable, royalty-bearing, transferable, assignable,
sublicenseable (subject to Section 2.1.2) license under the Harpoon Disclosing Patents solely to make, have made, use, sell, offer
for sale and import Harpoon Disclosing Patent Covered Products in the Licensed Field in the Territory.

2.1.2

Sublicensing. Werewolf may grant and authorize the further grant of sublicenses of not greater
scope  than  the  licenses  granted  to  Werewolf  under  Section  2.1.1,  provided  that  (a)  Werewolf  shall  promptly  provide  Harpoon
with a copy of each sublicense agreement (which copy may be redacted with respect to information not pertinent to compliance
with this Agreement) and (b) Werewolf shall remain fully liable for the performance of such sublicensees (“Sublicensees”).

2.2

[***] Patent Cross Licenses.

2.2.1

Cross  License  Grants.  Subject  to  the  terms  and  conditions  set  forth  in  this  Agreement,  each
party  hereby  grants  to  the  other  party  a  perpetual,  non-exclusive,  irrevocable,  royalty-free  license  under  its  rights  in  the  [***]
Patents Controlled by such party to make, have made, use, sell, offer for sale and import [***] Products, in the case of Werewolf,
within the Werewolf Subject Matter and in the case of Harpoon, within the Harpoon Subject Matter. Each such license granted
under  this  Section  2.2.1  shall  only  be:  (a)  transferable  or  assignable  in  connection  with  a  permitted  assignment  of  all  of  such
party’s rights under this Agreement pursuant to Section 10.6; and (b) sublicensable to the extent each such sublicense is limited to
[***]  Products,  (i)  with  respect  to  Werewolf,  which  are  within  the  Werewolf  Subject  Matter  and  as  to  which  Werewolf  has
materially contributed to the discovery or development, and (ii) with respect to Harpoon, which are within the Harpoon Subject
Matter  and  as  to  which  Harpoon  has  materially  contributed  to  the  discovery  or  development  (the  foregoing  criteria  under  this
clause (b), the “Sublicensing Criteria”). For clarity and without limitation, for purposes of this Section 2.2.1, a [***] Product
shall be deemed not “within” the Werewolf Subject Matter or Harpoon Subject Matter, as applicable, if any component of such
product (including any portion not covered by the

- 4 -

 
 
 
applicable  Patent),  falls  within  the  Harpoon  Subject  Matter  (in  the  case  of  a  sublicense  by  Werewolf)  or  within  the  Werewolf
Subject Matter (in the case of a sublicense by Harpoon).

2.2.2

Expedited  Arbitration.  In  the  event  any  dispute  or  disagreement  arises  between  the  parties
relating to whether the applicable Sublicensing Criteria have been satisfied, either party may, by written notice to the other party,
elect to submit such dispute or disagreement for final settlement via binding arbitration conducted in New York in accordance
with the Expedited Procedures of the ICC arbitration rules. The arbitration will be conducted by a single, mutually acceptable
arbitrator  who  shall  not  be  a  current  or  former  employee  or  director,  or  a  current  stockholder,  of  either  party  or  any  of  their
respective Affiliates and who shall have at least fifteen (15) years of pharmaceutical industry experience.  The arbitrator will, in
rendering  his/her  decision,  apply  the  intellectual  property  laws  of  the  United  States  and  the  substantive  law  of  the  State  of
California,  without  reference  to  its  conflict  of  laws  principles,  as  applicable.   The  decision  rendered  by  the  arbitrator  shall  be
limited  to  the  Sublicensing  Criteria.    The  decision  rendered  by  the  arbitrator  shall  be  final,  binding  and  non-appealable,  and
judgment may be entered upon it in any court of competent jurisdiction. Each party shall bear its own attorney's fees, costs, and
disbursements arising out of the arbitration, and shall pay an equal share of the fees and costs of the arbitrator.

2.3

Harpoon  Assignment.  Harpoon  hereby  sells,  assigns  and  transfers  the  Harpoon  Assigned  Patents  to
Werewolf, to the extent not previously sold, assigned and transferred to Werewolf pursuant to the Original Agreement or the First
Amended and Restated Agreement. Upon request, Harpoon shall execute and deliver such reasonable documents and instruments
as necessary to effect the foregoing assignment.

2.4

Werewolf  Assignment.  Werewolf  hereby  sells,  assigns  and  transfers  the  Werewolf  Assigned  Patents  to
Harpoon, to the extent not previously sold, assigned and transferred to Harpoon pursuant to the Original Agreement or the First
Amended  and  Restated  Agreement.  Upon  request,  Werewolf  shall  execute  and  deliver  such  reasonable  documents  and
instruments as necessary to effect the foregoing assignment.

2.5

No  Other  Grant  of  Rights.  Each  party  acknowledges  that  the  rights  and  licenses  granted  under  this
Agreement are limited to the licenses expressly granted in Sections 2.1 and 2.2 and the assignments expressly granted in Sections
2.3, 2.4 and 3.5. No other right, title, or interest of any nature whatsoever is granted, whether by implication, estoppel, reliance,
or otherwise. Werewolf shall not practice under the Harpoon Licensed Patents or Harpoon Disclosing Patents outside the scope of
the licenses granted to Werewolf in Section 2.1.1. Neither party shall practice under the other party’s [***] Patents outside the
scope of the license granted such party in Section 2.2.1.

3.

Intellectual Property.

3.1

Prosecution of Harpoon Licensed Patents. As between the parties, Harpoon shall have the sole right to file
for, prosecute and maintain the Harpoon Licensed Patents, using patent counsel of its choice, and all decision-making authority
with regard to such filing, prosecution and maintenance shall vest in Harpoon (including as to whether to maintain or abandon
any patent, patent application or claim within the Harpoon Licensed Patents).

- 5 -

 
 
 
3.2

Enforcement of Harpoon Licensed Patents and Harpoon Disclosing Patents. In the event that Werewolf
reasonably believes that the Harpoon Licensed Patents or the Harpoon Disclosing Patents are being infringed by a third party,
Werewolf shall promptly notify Harpoon and provide Harpoon with its evidence thereof. Except with respect to [***], in no event
shall Werewolf contact or otherwise notify any such third party regarding such infringement without the prior written consent of
Harpoon; provided that [***]. As between the parties, Harpoon shall have the sole right to enforce the Harpoon Licensed Patents
and,  except  as  provided  herein,  the  Harpoon  Disclosing  Patents  with  respect  to  any  infringement  thereof,  or  to  defend  any
declaratory  judgment  action  with  respect  to  the  Harpoon  Licensed  Patents  and,  except  as  provided  herein,  the  Harpoon
Disclosing Patents. In addition, as between the parties, Harpoon shall have the sole right to defend any challenges to the scope,
validity or enforceability of any of the Harpoon Licensed Patents and, except as provided herein, the Harpoon Disclosing Patents.
Werewolf shall have the initial right to (i) enforce or defend (as applicable) Harpoon Disclosing Patent Werewolf Infringements;
and (ii) defend any challenges to the scope, validity or enforceability of any of the Harpoon Disclosing Patents impacting claims
thereof covering Werewolf  Subject  Matter  (“Harpoon  Disclosing  Patent  Werewolf  Patent  Actions”);  provided  that  Harpoon
shall [***]. In the event that, within [***] days after first becoming aware thereof, Werewolf does not initiate action, or thereafter
discontinues  such  action,  to  (a)  enforce  or  defend  (as  applicable)  any  Harpoon  Disclosing  Patent  Werewolf  Subject  Matter
Infringement; or (b) respond to or defend any Harpoon Disclosing Patent Werewolf Patent Action, then (in either case (a) or  (b)),
Werewolf shall [***] and Harpoon shall [***]; provided that Werewolf shall [***].

3.3

Maintenance  of  Harpoon  Assigned  Patents  and  Werewolf  Assigned  Patents.  To  the  extent  allowed  by
applicable law, Werewolf and its Affiliates shall [***]. To the extent allowed by applicable law, Harpoon and its Affiliates shall
[***].

3.4

Sequence Modifications. For the avoidance of doubt, Werewolf has the [***], and, as between the parties,

[***].

3.5

Prosecution of Harpoon Disclosing Patents. As between the parties, Harpoon shall have the sole right to
file  for,  prosecute  and  maintain  the  Harpoon  Disclosing  Patents,  using  patent  counsel  of  its  choice,  and  all  decision-making
authority with regard to such filing, prosecution and maintenance shall vest in Harpoon (including as to whether to maintain or
abandon any patent, patent application or claim within the Harpoon Disclosing Patents), provided, however, that [***]. In such
event,  [***].  Upon  [***],  [***]  will  [***].  Except  as  provided  above  in  this  paragraph,  both  parties  may  [***].  [***].  In  the
event of any dispute regarding filing or prosecution of any Harpoon Disclosing Patent that claims Werewolf Subject Matter, the
matter will be [***].

3.6

Disclosure of Patents in Werewolf Subject Matter. During the Period of Collaboration, [***] shall [***],

and [***]. For clarity, this Section 3.6 will not apply with respect to [***].

4.

Payments.

4.1

Upfront  Fee.  The  parties  agree  and  acknowledge  that,  within  [***]  after  the  Effective  Date,  Werewolf

previously paid to Harpoon an upfront fee in the amount of [***]

- 6 -

 
 
 
pursuant  to  the  Original  Agreement.  Such  upfront  fee  shall  be  non-refundable,  and  shall  not  be  creditable  against  any  other
amount due hereunder.

4.2

Legal  Fees.  Promptly  (and  in  any  event  within  [***])  following  receipt  of  an  invoice,  Werewolf  shall
reimburse Harpoon for (or pay directly) Harpoon’s reasonable legal costs incurred in connection with the negotiation and drafting
of the Original Agreement, in an amount not to exceed [***]. Promptly (and in any event within [***]) following receipt of an
invoice,  Harpoon  shall  reimburse  Werewolf  for  (or  pay  directly)  Werewolf’s  legal  costs  incurred  in  connection  with  the
negotiation and drafting of this Agreement, in an amount not to exceed [***].

4.3

Payment Methods. All payments due under this Agreement to Harpoon shall be made by bank wire transfer
in immediately available funds to an account designated by Harpoon. All payments due under this Agreement shall be made in
the legal currency of the United States of America, and all references to “$” or “Dollars” shall refer to United States dollars. For
conversion of foreign currency to United States dollars, the conversion rate shall be the exchange rate quoted in The Wall Street
Journal on the day that the payment is due.

4.4

Withholdings Taxes.  Any  withholding  or  other  tax  that  is  required  by  law  to  be  withheld  with  respect  to
payments owed by Werewolf pursuant to this Agreement shall be deducted by Werewolf from such payment prior to remittance
and paid to the applicable tax authority. Werewolf shall promptly furnish Harpoon evidence of any such taxes withheld and paid
and reasonably assist Werewolf in obtaining applicable credits and refunds with respect thereto.

4.5

Royalties.

4.5.1

Royalty Payment. Werewolf shall pay to Harpoon a royalty of (a) [***] of Net Sales of Harpoon
Licensed  Patent  Covered  Products;  and  (b)  [***]  of  Net  Sales  of  Harpoon  Disclosing  Patent  Covered  Products,  provided  that
[***]  (collectively,  the  “Earned  Royalty”).  The  Earned  Royalty  shall  be  due  and  payable  within  [***]  after  the  end  of  the
calendar quarter during which the corresponding Net Sales are made.

4.5.2

Minimum  Annual  Royalty.  Beginning  with  the  first  commercial  sale  by  Werewolf,  or  its
Affiliate or licensee, of the first Harpoon Licensed Patent Covered Product (the “First Commercial Sale”), Werewolf shall pay
to Harpoon minimum annual royalties of [***], which amount shall be pro-rated for any partial calendar year (the “Minimum
Annual Royalty”).  The  Minimum  Annual  Royalty  shall  be  due  and  payable  within  [***]  after  the  end  of  each  calendar  year
following the First Commercial Sale, and all Earned Royalty payments made with respect to a particular calendar year shall be
offset against the Minimum Annual Royalty for such calendar year (provided that such Minimum Annual Royalty shall not be
reduced to less than zero).

Royalty Term. The obligation to pay the Earned Royalty with respect to a Covered Product shall
expire on [***]. The obligation to pay the Minimum Annual Royalty shall expire when no further Earned Royalty is due with
respect to any Harpoon Licensed Patent Covered Products in accordance with the preceding sentence.

4.5.3

No  Multiple  Royalties.  The  obligation  to  pay  the  Earned  Royalty  is  imposed  only  once  with
respect  to  Net  Sales  of  the  same  unit  of  a  Covered  Product  such  that  if  the  manufacture,  use,  sale  or  import  of  any  Covered
Product is Covered by more than one Valid Claim

4.5.4

- 7 -

 
 
 
of any Harpoon Licensed Patents or Harpoon Disclosing Patents, multiple royalties shall not be due.

Reports. Together with each payment under Sections 4.5.1 and 4.5.2, Werewolf shall deliver a
written report to Harpoon stating in each such report the total Net Sales during the applicable reporting period; (ii) the calculation
of royalties; and (iii) the total royalties so calculated and due to Harpoon.

4.5.5

4.5.6

Records;  Audit.  Werewolf  shall,  and  shall  cause  its  Affiliates  and  Sublicensees  to,  keep
complete and accurate books and records setting forth gross sales of Covered Products, Net Sales of Covered Products, itemized
deductions from gross sales taken to calculate Net Sales and amounts payable hereunder to Harpoon for each Covered Product.
Upon reasonable prior notice from Harpoon, Werewolf shall permit an independent public accounting firm engaged by Harpoon
to  examine  and  audit  such  books  and  records,  during  Werewolf’s  regular  business  hours,  to  verify  the  amounts  reported  by
Werewolf in accordance with Section 4.5.5 and the payment of royalties hereunder. The foregoing audit right may be exercised
only once during each [***] period and shall be limited to the pertinent books and records for any calendar year ending not more
than [***] before the date of the audit request. The opinion of said independent accountants regarding such reports and payments
shall be binding on the parties other than in the case of clear error. Harpoon shall bear the cost of any such audit, provided that if
the  audit  identifies  an  underpayment  of  royalties  payable  hereunder  of  more  than  [***]  of  the  amount  due  for  the  applicable
period,  then  Werewolf  shall  promptly  reimburse  Harpoon  for  all  costs  incurred  in  connection  with  such  audit.  Werewolf  shall
promptly  pay  to  Harpoon  the  amount  of  any  underpayment  of  royalties  revealed  by  an  audit,  including  any  interest  on  such
underpayment at the rate specified in Section 4.6 calculated from the date such payment was originally due. Any overpayment of
royalties by Werewolf revealed by an audit shall be fully-creditable against future royalty payments under Section 4.5.1.

4.6

Late Payment. Any amounts due hereunder which are not paid when due shall bear interest at the rate of
[***]  or  the  maximum  rate  allowable  by  law,  whichever  is  less.  This  Section  4.6  shall  in  no  way  limit  any  other  remedies
available to Harpoon.

5.

Confidentiality.

5.1

Confidentiality; Exceptions.  During  and  after  the  term  of  this  Agreement,  except  to  the  extent  expressly
authorized by this Agreement or otherwise agreed by the parties in writing, the parties agree that the receiving party shall keep
confidential and shall not publish or otherwise disclose or use for any purpose other than as provided for in this Agreement any
confidential or proprietary information or materials furnished to it by the other party pursuant to this Agreement (collectively,
“Confidential Information”). The terms and conditions of this Agreement shall be the Confidential Information of both parties
and, for clarity, any data, information, or know-how provided by a party pursuant to Sections 3.5 and 3.6 shall be the Confidential
Information of such party. Notwithstanding the foregoing, Confidential Information shall not be deemed to include information or
materials to the extent that it can be established by written documentation by the receiving party that such information or material
(a)  was  already  known  to  or  possessed  by  the  receiving  party  without  any  obligation  of  confidentiality,  at  the  time  of  its
disclosure to the receiving party hereunder; (b) was generally available to the public or otherwise part of the public

- 8 -

 
 
 
domain at the time of its disclosure to the receiving party hereunder; (c) became generally available to the public or otherwise
part  of  the  public  domain  after  its  disclosure  to  the  receiving  party  hereunder  other  than  through  any  act  or  omission  of  the
receiving party in breach of this Agreement; (d) was independently developed by the receiving party without use of or reference
to  the  other  party’s  Confidential  Information  as  demonstrated  by  documented  evidence  prepared  by  the  receiving  party
contemporaneously  with  such  independent  development;  or  (e)  was  disclosed  to  the  receiving  party,  other  than  under  an
obligation of confidentiality, by a third party who had no obligation to the disclosing party not to disclose such information to
others.

5.2

Authorized  Use  and  Disclosure.  Each  party  may  use  and  disclose  Confidential  Information  of  the  other
party as follows: (a) under appropriate confidentiality and non-use provisions substantially equivalent to those in this Agreement
in  connection  with  the  performance  of  its  obligations  or  exercise  of  rights  granted  to  such  party  in  this  Agreement;  (b)  to  the
extent  such  disclosure  is  reasonably  necessary  for  prosecuting  or  defending  litigation  or  complying  with  applicable  laws  or
regulations, provided, however, that if a party is required by law or regulation to make any such disclosure of the other party’s
Confidential Information it shall, to the extent practicable, give reasonable advance notice to the other party of such disclosure
requirement  and,  upon  request,  reasonably  assist  the  other  party  to  secure  confidential  treatment  of  such  Confidential
Information;  (c)  to  the  extent  such  disclosure  is  reasonably  necessary  for  filing,  prosecution  and  maintenance  of  the  Harpoon
Assigned  Patents,  Harpoon  Disclosing  Patents  or  the  Werewolf  Assigned  Patents,  as  the  case  may  be;  and  (d)  to  the  extent
mutually agreed to by the parties in writing. In addition, each party may disclose the terms and conditions of this Agreement to
actual and potential investors, acquirers, licensees, collaborators, advisors and other business partners on a reasonable need-to-
know basis under reasonable conditions of confidentiality.

6.

Representations and Warranties; Limitation of Liability.

6.1

Representations  and  Warranties  of  both  Parties.  Each  party  represents  and  warrants  to  the  other  party
that: (i) it is duly incorporated and validly existing under the laws of the jurisdiction of its incorporation, and has full corporate
power and authority to enter into this Agreement and to carry out the provisions hereof; (ii) the terms of this Agreement do not
conflict with any agreement, instrument or understanding, oral or written, to which it is a party or by which it may be bound, nor
violate any material applicable law; and (iii) it is not aware of any action, suit, inquiry or investigation instituted by any third
party which threatens the validity of this Agreement.

6.2

Additional  Representations  and  Warranties  of  Harpoon.  Harpoon  further  represents  and  warrants  to
Werewolf that, to its knowledge, Harpoon owns all right, title and interest in and to the Harpoon Licensed Patents and Harpoon
Disclosing Patents and, as of immediately prior to the Effective Date, owned all right, title and interest in and to the Harpoon
Assigned  Patents.  Additionally,  Harpoon  represents  and  warrants  to  Werewolf  that,  as  of  the  Second  Amendment  Date,  it  has
disclosed to Werewolf all (a) Harpoon patent applications claiming or disclosing Werewolf Subject Matter, (b) Harpoon patent
applications required to be disclosed under Section 3.3 of the First Amended and Restated Agreement, and (c) all [***] Patents.

- 9 -

 
 
 
6.3

Additional  Representations  and  Warranties  of  Werewolf.  Werewolf  further  represents  and  warrants  to
Harpoon that, to its knowledge, as of immediately prior to the Effective Date, Werewolf owned all right, title and interest in and
to the Werewolf Assigned Patents. Additionally, Werewolf represents and warrants to Harpoon that, as of the Second Amendment
Date,  it  has  disclosed  to  Harpoon  all  (a)  Werewolf  patent  applications  claiming  or  disclosing  Werewolf  Subject  Matter,  (b)
Werewolf patent applications required to be disclosed under Section 3.3 of the First Amended and Restated Agreement, and (c)
all [***] Patents.

6.4

No Other Warranty.

6.4.1

NOTHING  CONTAINED  HEREIN  SHALL  BE  DEEMED  TO  BE  A  WARRANTY  BY
HARPOON  THAT  HARPOON  CAN  OR  SHALL  BE  ABLE  TO  OBTAIN  PATENTS  ON  PATENT  APPLICATIONS
INCLUDED IN THE HARPOON LICENSED PATENTS, THE HARPOON DISCLOSING PATENTS OR HARPOON’S [***]
PATENTS  OR  THAT  WEREWOLF  CAN  OR  SHALL  BE  ABLE  TO  OBTAIN  PATENTS  ON  PATENT  APPLICATIONS
INCLUDED IN THE HARPOON ASSIGNED PATENTS, OR THAT ANY OF THE HARPOON LICENSED PATENTS, THE
HARPOON  DISCLOSING  PATENTS,  HARPOON’S  [***]  PATENTS  OR  THE  HARPOON  ASSIGNED  PATENTS  SHALL
AFFORD ADEQUATE OR COMMERCIALLY WORTHWHILE PROTECTION.

6.4.2

NOTHING  CONTAINED  HEREIN  SHALL  BE  DEEMED  TO  BE  A  WARRANTY  BY
WEREWOLF  THAT  WEREWOLF  CAN  OR  SHALL  BE  ABLE  TO  OBTAIN  PATENTS  ON  PATENT  APPLICATIONS
INCLUDED IN WEREWOLF’S [***] PATENTS OR THAT HARPOON CAN OR SHALL BE ABLE TO OBTAIN PATENTS
ON  PATENT  APPLICATIONS  INCLUDED  IN  THE  WEREWOLF  ASSIGNED  PATENTS,  OR  THAT  ANY  OF
WEREWOLF’S  [***]  PATENTS  OR  THE  WEREWOLF  ASSIGNED  PATENTS  SHALL  AFFORD  ADEQUATE  OR
COMMERCIALLY WORTHWHILE PROTECTION.

6.4.3

EXCEPT  AS  EXPRESSLY  PROVIDED  IN  THIS  ARTICLE  6,  NEITHER  PARTY  MAKES
ANY  REPRESENTATIONS,  WARRANTIES  OR  CONDITIONS  (EXPRESS,  IMPLIED,  STATUTORY  OR  OTHERWISE)
WITH  RESPECT  TO  THE  HARPOON  LICENSED  PATENTS,  THE  HARPOON  DISCLOSING  PATENTS,  THE  [***]
PATENTS, THE HARPOON ASSIGNED PATENTS, OR THE WEREWOLF ASSIGNED PATENTS, OR OTHERWISE WITH
RESPECT TO THE SUBJECT MATTER OF THIS AGREEMENT, AND EACH PARTY SPECIFICALLY DISCLAIMS ANY
AND  ALL  IMPLIED  WARRANTIES,  INCLUDING  THE  IMPLIED  WARRANTIES  OF  MERCHANTABILITY,  FITNESS
FOR A PARTICULAR PURPOSE, TITLE, VALIDITY OF ANY PATENTS AND NON-INFRINGEMENT OF THIRD PARTY
INTELLECTUAL PROPERTY RIGHTS.

6.5

Limitation  of  Liability.  EXCEPT  WITH  RESPECT  TO  EACH  PARTY’S  OBLIGATIONS  UNDER
ARTICLES  5  AND  7,  NEITHER  PARTY  SHALL  BE  LIABLE  TO  THE  OTHER  WITH  RESPECT  TO  ANY  SUBJECT
MATTER OF THIS AGREEMENT UNDER ANY CONTRACT, NEGLIGENCE, STRICT LIABILITY OR OTHER LEGAL
OR EQUITABLE THEORY FOR (A) ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL OR PUNITIVE DAMAGES OR
LOST PROFITS OR (B) COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES.

- 10 -

 
 
 
7.

Indemnification and Insurance.

7.1

Indemnity.

7.1.1

Indemnification by Werewolf. Werewolf hereby agrees to indemnify, defend and hold harmless
Harpoon and each of its Affiliates, and its and their respective agents, directors, officers, employees and independent contractors
(collectively, the “Harpoon Indemnitees”) from and against any liability or expense (including reasonable legal expenses and
attorneys’ fees) (collectively, “Losses”) resulting from any suit(s), claim(s), action(s) and demand(s), in each case brought by a
third party (each, a “Third Party Claim”) arising out of (a) a material breach by Werewolf of this Agreement, (b) violation by
Werewolf  of  applicable  law  in  connection  with  this  Agreement,  (c)  Werewolf’s  gross  negligence  or  willful  misconduct  in
connection  with  this  Agreement,  or  (d)  the  making,  using,  offering  for  sale,  selling,  and/or  importing  any  Covered  Product  or
[***]  Product  by  Werewolf  or  any  of  its  Affiliates  or  licensees.  Werewolf’s  obligation  to  indemnify  the  Harpoon  Indemnitees
pursuant  to  this  Section  7.1.1  shall  not  apply  to  the  extent  that  any  such  Losses  arise  from  any  matter  for  which  Harpoon  is
obligated to indemnify Werewolf pursuant to Section 7.1.2.

7.1.2

Indemnification by Harpoon. Harpoon hereby agrees to indemnify, defend and hold harmless
Werewolf and each of its Affiliates, and its and their respective agents, directors, officers, employees and independent contractors
(collectively, the “Werewolf Indemnitees”) from and against any Losses resulting from any Third Party Claim arising out of (a)
a material breach by Harpoon of this Agreement, (b) violation by Harpoon of applicable law in connection with this Agreement,
(c) Harpoon’s gross negligence or willful misconduct in connection with this Agreement, or (d) the making, using, offering for
sale,  selling,  and/or  importing  any  [***]  Product  by  Harpoon  or  any  of  its  Affiliates  or  licensees.  Harpoon’s  obligation  to
indemnify the Werewolf Indemnitees pursuant to this Section 7.1.2 shall not apply to the extent that any such Losses arise from
any matter for which Werewolf is obligated to indemnify Harpoon pursuant to Section 7.1.1.

7.1.3

Procedure. A party seeking indemnification under Section 7.1 (the “Indemnitee”) shall provide
the other party (the “Indemnitor”) with (a) prompt written notice of any Third Party Claim for which the Indemnitee wishes to
obtain  indemnification;  (b)  the  ability  to  defend  (with  the  reasonable  cooperation  of  the  Indemnitee)  or  settle  any  such  Third
Party  Claim;  and  (c)  reasonable  assistance  and  full  information  with  respect  to  such  Third  Party  Claim  at  the  Indemnitor’s
expense, provided, however, that the Indemnitor shall not enter into any settlement that admits fault or wrongdoing, or involves
any other admission or for which the Indemnitee would be liable for damages, without the Indemnitee’s written consent, such
consent not to be unreasonably withheld or delayed. The Indemnitee shall have the right to participate, at its own expense and
with counsel of its choice, in the defense of any Third Party Claim that has been assumed by the Indemnitor.

8.

Term and Termination.

8.1

Term. The term of this Agreement shall commence on the Effective Date and, unless earlier terminated as
provided in this Article 8, shall continue in full force and effect on a country-by-country basis until the expiration of the last to
expire patent or patent application

- 11 -

 
 
 
included in the Harpoon Licensed Patents, Harpoon Disclosing Patents or [***] Patents within the applicable country.

8.2

Termination.

notice to Harpoon referencing this Section 8.2.1.

8.2.1

Termination without Cause. Werewolf may terminate this Agreement upon [***] prior written

8.2.2

Termination  for  Breach.  In  the  event  that  either  party  commits  a  material  breach  of  its
obligations under this Agreement and fails to cure that breach within [***] after receiving written notice thereof from the non-
breaching party, the non-breaching party shall have the right to terminate this Agreement immediately upon written notice to the
party in breach.

8.2.3

Bankruptcy. Harpoon may terminate Section 2.1.1 and 2.1.2 of this Agreement upon notice to
Werewolf  if  Werewolf  is  declared  insolvent,  is  adjudged  bankrupt,  applies  for  judicial  or  extra-judicial  settlement  with  its
creditors, makes an assignment for the benefit of its creditors, voluntarily files for bankruptcy or has a receiver or trustee (or the
like)  in  bankruptcy  appointed  by  reason  of  its  insolvency,  or  in  the  event  an  involuntary  bankruptcy  action  is  filed  against
Werewolf and not dismissed within [***] days, or if Werewolf becomes the subject of liquidation or dissolution proceedings or
otherwise discontinues business.

8.3

Effect of Termination or Expiration.

8.3.1

Termination of Rights. Upon termination of this Agreement by either party pursuant to any of
the  provisions  of  Section  8.2,  the  rights  and  licenses  granted  to  Werewolf  under  Section  2.1.1  and  2.1.2  shall  immediately
terminate, all rights in and to and under the Harpoon Licensed Patents and Harpoon Disclosing Patents shall revert to Harpoon
and Werewolf shall make no further use or exploitation of any of the Harpoon Licensed Patents or Harpoon Disclosing Patents.

of obligations accruing prior to, or which are attributable to a period prior to, any termination or expiration of this Agreement.

8.3.2

Accruing Obligations. Termination or expiration of this Agreement shall not relieve the parties

8.4

Survival. Articles 1, 5, 7, 9 and 10 and Sections 2.2.1, 2.3, 2.4, 4.3, 4.6, 6.5, 8.3 and 8.4 shall survive the
expiration  or  any  termination  of  this  Agreement.  Except  as  otherwise  provided  in  this  Section  8.4,  all  other  provisions  of  this
Agreement shall terminate upon the expiration or termination of this Agreement.

9.

Other Matters.

9.1

Mutual Agreement.    In  exchange  for  the  mutual  promises  contained  herein  and  other  good  and  valuable
consideration,  the  receipt  and  sufficiency  of  which  are  hereby  acknowledged,  each  party,  on  behalf  of  itself  and  its  respective
successors  and  assigns  (the  “Releasing  Party”),  hereby  fully  and  forever  releases  the  other  party  and  its  current  and  former
officers, directors, employees, agents and their successors and assigns from and agrees not to sue or otherwise institute or cause
to be instituted any legal or administrative proceedings concerning [***].

- 12 -

 
 
 
9.2

Scope.  Each Releasing Party agrees that the release set forth in this Section 9 shall be and remain in effect in
all respects as a complete general release as to the matters released.  Each Releasing Party shall be responsible to the other party
for all costs, attorneys’ fees and damages incurred by such other party in defending against a claim, suit or proceeding brought or
pursued by such Releasing Party in violation of this Section 9.  Notwithstanding anything to the contrary in this Agreement, each
party reserves all rights and remedies against the other party in the event of such other party’s failure to perform any obligations
under this Agreement.

10.

Miscellaneous.

10.1

Entire Agreement. This Agreement is the sole agreement between the parties with respect to the subject
matter hereof and, except as expressly set forth herein, supersedes all other agreements and understandings between the parties
with  respect  to  such  subject  matter,  including  the  Original  Agreement  and  the  First  Amended  and  Restated  Agreement.    For
clarity, the parties agree and acknowledge that the Common Interest Agreement dated March 19, 2018 between Werewolf and
Harpoon remains in effect in accordance with its terms.

10.2

Notices. Unless otherwise specifically provided, all notices required or permitted by this Agreement shall
be  in  writing  and  may  be  delivered  personally,  or  may  be  sent  by  facsimile,  overnight  courier  or  certified  mail,  return  receipt
requested, to the following addresses, unless the parties are subsequently notified of any change of address in accordance with
this Section 10.2:

If to Werewolf:

If to Harpoon:

Werewolf Therapeutics, Inc.
1030 Massachusetts Avenue, 2nd Floor
Cambridge, MA 02138 
Attention: Chief Executive Officer

Harpoon Therapeutics, Inc.
131 Oyster Point Boulevard, Suite 300 
South San Francisco, CA 94080 
Attention: Chief Executive Officer

Any  notice  shall  be  deemed  to  have  been  received  as  follows:  (a)  by  personal  delivery  or  expedited  delivery,  upon
receipt; (b) by facsimile, one business day after transmission; or (c) by certified mail, as evidenced by the return receipt. If notice
is sent by facsimile, a confirming copy of the same shall be sent by mail.

10.3

Binding  Effect.  This  Agreement  shall  be  binding  upon  and  inure  to  the  benefit  of  the  parties  and  their

respective legal representatives, successors and permitted assigns.

10.4

Amendment; Waiver. This Agreement may be amended, modified, superseded or canceled, and any of the
terms  may  be  waived,  only  by  a  written  instrument  executed  by  each  party  or,  in  the  case  of  waiver,  by  the  party  waiving
compliance. The delay or failure of either party at any time or times to require performance of any provisions hereof shall in no
manner affect the rights at a later time to enforce the same. No waiver by either party of any condition or of the breach of any
term  contained  in  this  Agreement,  whether  by  conduct,  or  otherwise,  in  anyone  or  more  instances,  shall  be  deemed  to  be,  or
considered  as,  a  further  or  continuing  waiver  of  any  such  condition  or  of  the  breach  of  such  term  or  any  other  term  of  this
Agreement.

- 13 -

 
 
 
 
 
10.5

Independent Contractors. The parties agree that the relationship of Harpoon and Werewolf established by
this Agreement is that of independent contractors, and this Agreement does not establish an employment, agency or any other
relationship  between  the  parties.  Except  as  may  be  specifically  provided  herein,  neither  party  shall  have  any  right,  power  or
authority,  nor  shall  they  represent  themselves  as  having  any  authority,  to  assume,  create  or  incur  any  expense,  liability  or
obligation, express or implied, on behalf of the other party, or otherwise act as an agent for the other party for any purpose.

10.6

Assignment.  Neither  party  may  assign  this  Agreement  or  any  of  such  party’s  rights  and  obligations
hereunder without the prior written consent of the other party, except that this Agreement may be assigned by a party without the
other  party’s  consent  (i)  to  an  Affiliate  of  such  party  or  (ii)  to  its  successor  in  connection  with  such  party’s  sale  of  all  or
substantially  all  of  such  party’s  business  or  assets  to  which  this  Agreement  relates  (whether  by  merger,  consolidation,  stock
purchase,  asset  purchase  or  otherwise).  Any  assignment  purported  or  attempted  to  be  made  in  violation  of  the  terms  of  this
Section 10.6 shall be null and void and of no legal effect.

10.7

Interpretation. Section and subsection headings are inserted for convenience of reference only and do not
form a part of this Agreement. Each party acknowledges and agrees that: (a) it and/or its counsel reviewed and negotiated the
terms and provisions of this Agreement and has contributed to its revision; and (b) the rule of construction to the effect that any
ambiguities are resolved against the drafting party shall not be applied in the interpretation of this Agreement. The definitions of
terms herein shall apply equally to the singular and plural forms of the terms defined. Except where otherwise indicated, (i) any
definition of or reference to any agreement, instrument or other document herein shall be construed as referring to the agreement,
instrument or other document as from time to time amended, supplemented or otherwise modified (subject to any restriction on
the  amendments,  supplements  or  modifications  set  forth  herein),  (ii)  any  reference  herein  to  any  person  or  entity  shall  be
construed to include, without limitation. the person or entity’s successors and assigns, (iii) the words “herein,” “hereof,” “hereby”
and  “hereunder,”  and  words  of  similar  import,  shall  be  construed  to  refer  to  this  Agreement  in  its  entirety  and  not  to  any
particular provision hereof, (iv) all references herein to Articles, Sections and Exhibits shall be construed to refer to Articles of,
Sections  of,  and  Exhibits  to  this  Agreement,  each  of  which  Exhibits  is  incorporated  herein  by  reference,  and  (v)  the  words
“include”, “includes” and “including” shall be deemed to be followed by the phrase “without limitation”.

10.8

Severability. If any provision of this Agreement is or becomes in valid or is ruled invalid by any court of
competent jurisdiction or is deemed unenforceable, it is the intention of the parties that the remainder of this Agreement shall not
be affected.

10.9

Counterparts. The parties may execute this Agreement in multiple counterparts, all of which together shall
constitute  one  and  the  same  instrument.  Executed  counterparts  of  this  Agreement  delivered  via  facsimile  or  electronic  mail  in
PDF or similar electronic format shall be deemed binding as originals.

10.10

Governing Law. This Agreement and any dispute arising from the performance or breach hereof will be
governed by and construed and enforced in accordance with the laws of the State of California, without reference to the conflicts
of laws principles of any jurisdiction.

- 14 -

 
 
 
(The remainder of this page is intentionally left blank. The signature page follows.)

- 15 -

 
 
 
The  parties  have  caused  this  Agreement  to  be  executed  by  their  duly  authorized  representatives  as  of  the  Second

Amendment Date.

WEREWOLF THERAPEUTICS, INC.

HARPOON THERAPEUTICS, INC.

By: /s/ Daniel J. Hicklin

Name: Daniel J. Hicklin

Title: President & CEO

By: /s/ Gerald McMahon

Name: Gerald McMahon

Title: President and CEO

- 16 -

 
 
 
 
 
Exhibit 1.5

[***] Patents

[***] Patents:

[***]

[***] Patents:

[***]

 
 
 
 
 
 
 
 
Exhibit 1.7

Harpoon Assigned Patents

Case
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Country
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Title
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Serial Number
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Filing Date
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Patent Number
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

 
 
 
 
 
Exhibit 1.8

Harpoon Disclosing Patents

Case
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Country
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Title
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Serial Number
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Filing Date
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Patent
Number
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

 
 
 
 
Exhibit 1.9

Harpoon Licensed Patents

Case
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Country
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Title
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Serial Number
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Filing Date
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Patent
Number
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

 
 
 
 
 
 
Exhibit 1.19

Werewolf Assigned Patents

Case
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Country
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Title
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Serial Number
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Filing Date
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

Patent
Number
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]
[***]

 
 
 
 
 
 
HARPOON THERAPEUTICS, INC.

FIFTH AMENDED AND RESTATED CONSULTING AGREEMENT

Exhibit 10.20

THIS FIFTH AMENDED AND RESTATED CONSULTING AGREEMENT (this “Agreement”) dated as of March 3,

2020 is entered into between Harpoon Therapeutics, Inc., a Delaware corporation (the “Company”), and Patrick Baeuerle (the
“Consultant”) and amends and restates the Third Amended and Restated Consulting Agreement dated February 1, 2017 between
the Company and the Consultant, as amended by the Fourth Amended and Restated Consulting Agreement dated March 5, 2018
between the Company and the Consultant.

INTRODUCTION

The Company desires to retain the services of the Consultant and the Consultant desires to perform certain services for

the Company. In consideration of the mutual covenants and promises contained herein and other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged by the parties hereto, the parties agree as follows:

1.

Services.

1.1

During the Consultation Period (as defined herein), the Consultant agrees to

perform, as a Senior Advisor to Company, such consulting, advisory and related services to and for the Company in the Harpoon
Consulting Field (as defined herein) as may be reasonably requested from time to time by the Company (the “Services”).
Consultant agrees that the Company may, at its discretion, publicize the fact that Consultant is providing Services to the
Company by featuring his biography on the Company’s website (if any) and in marketing material relating to the Company
and/or its affiliates. During the time Consultant is providing Services, he and the Company shall refer to his position as “Senior
Advisor”.  For purposes of this Agreement, “Harpoon Consulting Field” means molecules that bind to an antigen on a T-cell,
where “antigen” means any molecule, whether or not foreign to the body.

1.2

The Company acknowledges that the Consultant is concurrently providing

consulting services for MPM Asset Management LLC (“MPM”), MPM Oncology Impact Management LP (“OIM”) and other
portfolio companies affiliated with MPM and OIM (including, without limitation, TCR2 Therapeutics Inc. and Werewolf
Therapeutics, Inc.), separate and apart from his Services to the Company. It is understood and agreed that Consultant’s Services
under this Agreement will be consistent with Consultant’s obligations to MPM, OIM and such other MPM and OIM-affiliated
portfolio companies; provided, however, that Consultant shall use his reasonable best efforts and all due diligence in performing
the Services.

2.

Compensation.

 
 
Consulting Fees. The consideration described below in this Section 2.1 constitutes
the full consideration for the consulting services to be provided by the Consultant to the Company. Consultant’s compensation
from Company shall be reviewed on an annual basis.

2.1

8,333 per month, which shall be payable monthly on the last day of each month in Euros using the conversion rate of USD to
Euros at the time of such payment. Consultant shall not be eligible for an annual bonus paid by Company.

(a)

The Company shall pay to the Consultant consulting fees of Euro

2.2

Reimbursement of Expenses. The Company shall reimburse the Consultant for all
reasonable and necessary expenses incurred or paid by the Consultant in connection with, or related to, the performance of his
services under this Agreement. The Consultant shall submit to the Company itemized monthly statements, in a form satisfactory
to the Company, of such expenses incurred in the previous month. The Company shall pay to the Consultant amounts shown on
each such statement within 30 days after receipt thereof. Notwithstanding the foregoing, the Consultant shall not incur total
expenses in excess of US$1,000 per month without the prior written approval of the Company.

2.3

Benefits. The Consultant shall not be entitled to any benefits, coverages or

privileges, including, without limitation, social security, unemployment, medical or pension payments, made available to
employees of the Company.

3.

Term and Termination.

3.1

This Agreement shall commence upon the date hereof (the “Effective Date”) and
shall continue until the first anniversary of the Effective Date, after which it shall automatically extend for additional one-year
periods (such period, as it may be extended, being referred to as the “Consultation Period”), and unless sooner terminated by
either Party in accordance with the provisions of Section 3.2.

3.2

Without limiting any rights which either party to this Agreement may have by reason

of any default by the other party as well as any other remedies that may be available at law or in equity), each party reserves the
right to terminate this Agreement at its convenience by written notice given to the other party. Such termination shall be effective
upon the date not earlier than 30 days following the date of such notice as shall be specified in said notice.

3.3

Sections 3 through 15 hereof shall survive termination or expiration of this

Agreement, unless otherwise explicitly provided herein. In addition, termination of this Agreement shall not affect the
Company’s obligation to pay for services previously performed by the Consultant or expenses reasonably incurred by the
Consultant for which the Consultant is entitled to reimbursement under Section 2.2, above.

4.

Cooperation. The Consultant shall use his best efforts in the performance of his obligations under this

Agreement. The Company shall provide such access to its information and property related to the Harpoon Consulting Field as
may be reasonably required in order to permit

-2-

 
 
the Consultant to perform his obligations hereunder. The Consultant shall cooperate with the Company’s personnel, shall not
interfere with the conduct of the Company’s business and shall observe all rules, regulations and security requirements of the
Company concerning the safety of persons and property.

5.

Non-Competition. During the Consultation Period, the Consultant shall not, either alone or in

association with others, directly or indirectly provide services for other commercial entities that are not affiliated with MPM or
provide services for any third party (including MPM and any entities affiliated with MPM) in the Harpoon Consulting
Field.  Further, the Consultant represents that his consulting arrangement with Maverick Therapeutics, Inc. terminated on May
2019.

6.

Inventions and Proprietary Information.

6.1

Inventions. Except for Excluded Inventions and Excluded Joint Patents (each, as

defined in Exhibit A), all inventions, discoveries, computer programs, data, technology, designs, innovations and improvements
(whether or not patentable and whether or not copyrightable) which are made, conceived, reduced to practice, created, written,
designed or developed by the Consultant, solely or jointly with others and whether during normal business hours or otherwise,
during the Consultation Period if related to the Harpoon Consulting Field (collectively, “Inventions”), shall be the sole property
of the Company. Without limiting the generality of the foregoing, it is understood and agreed that “Inventions” shall include any
of the foregoing inventions, discoveries, computer programs, data, technology, designs, innovations and improvements that arise
from the Consultant’s performance of services for the Company or from the use of the Company’s Proprietary Information, but in
any event shall not include any Excluded Inventions or Excluded Joint Patents. The Consultant hereby assigns and agrees to
assign to the Company all Inventions and any and all related patents, copyrights, trademarks, trade names, and other industrial
and intellectual property rights and applications therefor, in the United States and elsewhere and appoints any officer of the
Company as his duly authorized attorney to execute, file, prosecute and protect the same before any government agency, court or
authority. Upon the request of the Company and at the Company’s expense, the Consultant shall execute such further
assignments, documents and other instruments as may be necessary or desirable to fully and completely assign all Inventions to
the Company and to assist the Company in applying for, obtaining and enforcing patents or copyrights or other rights in the
United States and in any foreign country with respect to any Invention. The Consultant also hereby waives all claims to moral
rights in any Inventions.

6.2

Proprietary Information.

(a)

The Consultant acknowledges that his relationship with the

Company is one of high trust and confidence and that in the course of his service to the Company he will have access to and
contact with Proprietary Information. The Consultant agrees that he will not, during the Consultation Period or at any time
thereafter, disclose to others, or use for his benefit or the benefit of others, any Proprietary Information or Invention.

-3-

 
 
(b)

For purposes of this Agreement, “Proprietary Information” shall

mean, by way of illustration and not limitation, all information (whether or not patentable and whether or not copyrightable)
owned, possessed or used by the Company, including, without limitation, any Invention, formula, vendor information, customer
information, apparatus, equipment, trade secret, process, research, report, technical data, know-how, computer program, software,
software documentation, hardware design, technology, marketing or business plan, forecast, unpublished financial statement,
budget, license, price, cost and employee list that is communicated to, learned of, developed or otherwise acquired by the
Consultant in the course of his service as a consultant to the Company under this Agreement or any prior agreement between the
parties.

The Consultant’s obligations under this Section 6.2 shall not apply
to any information that (i) is or becomes known to the general public under circumstances involving no breach by the Consultant
or others of the terms of this Section 6.2, (ii) is generally disclosed to third parties by the Company without restriction on such
third parties, or (iii) is approved for release by written authorization of the Board of Directors of the Company.

(c)

(d)

Upon termination of this Agreement or at any other time upon
request by the Company, the Consultant shall promptly deliver to the Company all records, files, memoranda, notes, designs,
data, reports, price lists, customer lists, drawings, plans, computer programs, software, software documentation, sketches,
laboratory and research notebooks and other documents (and all copies or reproductions of such materials) relating to the
business of the Company (except for any such items within the scope of Excluded Inventions and Excluded Joint Patents).

(e)

The Consultant represents that his retention as a consultant with the
Company and his performance under this Agreement does not, and shall not, breach any agreement that obligates him to keep in
confidence any trade secrets or confidential or proprietary information of his or of any other party or to refrain from competing,
directly or indirectly, with the business of any other party. The Consultant shall not disclose to the Company any trade secrets or
confidential or proprietary information of any other party.

to include any invention or other intellectual property right assigned by the Consultant to the Company under any prior
agreement between the parties.

(f)

For purposes of this Section 6.2, the term Invention shall be deemed

6.3

Remedies. The Consultant acknowledges that any breach of the provisions of this

Section 6 shall result in serious and irreparable injury to the Company for which the Company cannot be adequately compensated
by monetary damages alone. The Consultant agrees, therefore, that, in addition to any other remedy it may have, the Company
shall be entitled to enforce the specific performance of this Agreement by the Consultant and to seek both temporary and
permanent injunctive relief (to the extent permitted by law) without the necessity of proving actual damages.

Segregation. Consultant agrees to use his best efforts: (A) to segregate the Services
performed under this Agreement from Consultant’s work done for any third party so as to minimize any questions of disclosure
of, or rights under, any inventions; (B) to notify the Chief

6.4

-4-

 
 
Executive Officer or the Board of Directors of Company in writing if at any time Consultant believes that such questions may
result from his performance under this Agreement; and (C) to assist Company in fairly resolving any questions in this regard
which may arise. The Services performed hereunder will not be conducted on time that is required to be devoted to any other
third party. Consultant shall not use the funding, resources and facilities of any other third party, without the prior written consent
of Company, to perform Services hereunder and shall not perform the Services hereunder in any manner that would give any
third party rights or access to any work product of such Services.

No License. Nothing in this Agreement is intended to grant any rights to Consultant
under any patent or copyright of Company, nor shall this Agreement grant Consultant any rights in or to Proprietary Information
except as expressly set forth in this Agreement.

6.5

7.

Defense and Indemnification. The Company agrees, at its sole expense, to defend Consultant against,
and to indemnify and hold Consultant harmless from, any liability, claim, judgment, cost, expense, damage, deficiency, loss, or
obligation, of any kind or nature (including without limitation reasonable attorneys’ fees and other costs and expenses of defense)
relating to a claim or suit by a third party against Consultant, either arising from this Agreement, the Consultant’s performance of
services for the Company under this Agreement, or any Company products or services which result from the Consultant’s
performance of services under this Agreement.

8.

Independent Contractor Status. The Consultant shall perform all services under this Agreement as an
“independent contractor” and not as an employee or agent of the Company. Consultant is free to determine the time and place of
the Services to be provided under this Agreement. Consultant warrants to perform his obligations under this Agreement with the
usual standard of diligence but does not guarantee the achievement of any specific commercial objectives. The Consultant is not
authorized to assume or create any obligation or responsibility, express or implied, on behalf of, or in the name of, the Company
or to bind the Company in any manner.

9.

Notices. All notices required or permitted under this Agreement shall be in writing and shall be

deemed effective upon personal delivery or upon deposit in the United States Post Office, by registered or certified mail, postage
prepaid, addressed to the other party at the address shown above, or at such other address or addresses as either party shall
designate to the other in accordance with this Section 9.

10.

Pronouns. Whenever the context may require, any pronouns used in this Agreement shall include the

corresponding masculine, feminine or neuter forms, and the singular forms of nouns and pronouns shall include the plural, and
vice versa.

11.

Entire Agreement. This Agreement constitutes the entire agreement between the parties and

supersedes all prior agreements and understandings, whether written or oral, relating to the subject matter of this Agreement.  For
clarity, however, the parties agree and acknowledge that this Agreement does not terminate any assignment by the Consultant to
the Company of any invention or other intellectual property right made prior to the Effective Date pursuant to any prior
agreement between the parties.

-5-

 
 
12.

Amendment. This Agreement may be amended or modified only by a written instrument executed by

both the Company and the Consultant.

13.

Governing Law. This Agreement shall be construed, interpreted and enforced in accordance with the

laws of the Commonwealth of Massachusetts.

14.

Successors and Assigns. This Agreement shall be binding upon, and inure to the benefit of, both

parties and their respective successors and assigns, including any corporation with which, or into which, the Company may be
merged or which may succeed to its assets or business, provided, however, that the obligations of the Consultant are personal and
shall not be assigned by him.

15.

Miscellaneous.

15.1

No delay or omission by the Company in exercising any right under this

Agreement shall operate as a waiver of that or any other right. A waiver or consent given by the Company on any one occasion
shall be effective only in that instance and shall not be construed as a bar or waiver of any right on any other occasion.

only and in no way define, limit or affect the scope or substance of any section of this Agreement.

15.2

The captions of the sections of this Agreement are for convenience of reference

15.3

In the event that any provision of this Agreement shall be invalid, illegal or

otherwise unenforceable, the validity, legality and enforceability of the remaining provisions shall in no way be affected or
impaired thereby.

(signature page follows)
-6-

 
 
IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year set forth above,

HARPOON THERAPEUTICS, INC.

By: /s/ Gerald McMahon

Title: CEO & President

Gerald McMahon, PhD

CONSULTANT

By: /s/ Patrick
Baeuerle
Patrick Baeuerle, PhD

 
 
 
Exhibit A

Excluded Inventions and Excluded Joint Patents

“Excluded Inventions” means any information (including, without limitation, business plans and/or business information),
technology, know-how, materials, notes, records, designs, ideas, inventions, improvements, devices, developments, discoveries,
compositions, trade secrets, processes, methods and/or techniques, whether or not patentable or copyrightable, that are made by
Consultant alone or jointly with others in the course of performing services for an Excluded Company, in each case to the extent,
and only to the extent, such item is applicable within an Excluded Field and assigned to an Excluded Company pursuant to a
written consulting agreement in place prior to and as of the time such invention or other item is first made. To the extent any such
invention or other item is applicable or useful outside any Excluded Field, then to that extent, it shall not be deemed an Excluded
Invention. It is understood, however, that Excluded Joint Patents (defined below) are not so limited to an Excluded Field.

“Excluded Joint Patents” means any patent rights to which Consultant becomes a joint inventor with respect to a patentable
invention conceived jointly by Consultant with one or more employees of an Excluded Company directly in the course of
performing services for such Excluded Company, to the extent that: (a) the inventive contribution of the Excluded Company
employee(s) is not separable from that of Consultant and (b) the same is assigned to such Excluded Company pursuant to a
written consulting agreement in place prior to and as of the time such invention is first conceived.

For purposes of the foregoing:

•

•

•

•

•

•

“Antigen” means any molecule, whether or not foreign to the body.

“Excluded Company” means each of TCR2 Therapeutics Inc. and Werewolf Therapeutics, Inc.

“Excluded Field” means each of the TCR2 Field and the Werewolf Field.

“Cytokine” means any chemokine, interferon, interleukin, lymphokine or growth factor.

“TCR2 Field” means T-cells comprising a complete T-cell receptor (TCR) complex, in which at least one of
the six subunits of the TCR is fused to a tumor Antigen binder that binds to the tumor Antigen in an HLA-
independent fashion.

“Werewolf Field” means molecules comprising a Cytokine, and such molecules may include one or more
other elements that is (a) an antibody, (b) an immunoglobulin, (c) part of the immunoglobulin superfamily, or
(d) a fragment of (a) through (c).  For clarity, the Werewolf Field excludes molecules that do not comprise a
Cytokine, but which do comprise an immunoglobulin-based Cytokine binding domain.

 
 
 
 
 
 
 
 
 
 
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-229592) pertaining to the 2015 Equity Incentive Plan, the
2019 Equity Incentive Plan and the 2019 Employee Stock Purchase Plan of Harpoon Therapeutics, Inc. of our report dated March 12, 2020 with respect to
the financial statements of Harpoon Therapeutics, Inc., included in this Annual Report (Form 10-K) for the year ended December 31, 2019.

Exhibit 23.1

/s/ Ernst & Young LLP

Redwood City, California
March 12, 2020

 
 
CERTIFICATION PURSUANT TO
RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 31.1

I, Gerald McMahon, certify that:

1.

I have reviewed this annual report on Form 10-K of Harpoon Therapeutics, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-
15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision,

to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within
those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our
supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most

recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely
to materially affect, the registrant’s internal control over financial reporting; and

5.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the
registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are
reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal

control over financial reporting.

Date: March 12, 2020

  By: 

/s/ Gerald McMahon, Ph.D.
Gerald McMahon, Ph.D.
President and Chief Executive Officer
(Principal Executive Officer)

 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
CERTIFICATION PURSUANT TO
RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 31.2

I,  Georgia Erbez, certify that:

1.

I have reviewed this annual report on Form 10-K of Harpoon Therapeutics, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-
15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision,

to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within
those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our
supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most

recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely
to materially affect, the registrant’s internal control over financial reporting; and

5.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the
registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are
reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal

control over financial reporting.

Date: March 12, 2020

  By: 

/s/ Georgia Erbez 
Georgia Erbez
Chief Financial Officer
(Principal Financial Officer)

 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.1

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”) and Section 1350 of
Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350), Gerald McMahon, President and Chief Executive Officer of Harpoon Therapeutics,
Inc. (the “Company”), and Georgia Erbez, Chief Financial Officer of the Company, each hereby certifies that, to the best of his or her knowledge:

1.

2.

The Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2019, to which this Certification is attached as Exhibit 32.1
(the “Annual Report”), fully complies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act; and

The information contained in the Annual Report fairly presents, in all material respects, the financial condition and results of operations of the
Company.

Dated: March 12, 2020

IN WITNESS WHEREOF, the undersigned have set their hands hereto as of the 12th day of March, 2020.

Date: March 12, 2020

Date: March 12, 2020

  By: 

  By: 

/s/ Gerald McMahon, Ph.D.
Gerald McMahon, Ph.D.
President and Chief Executive Officer

/s/ Georgia Erbez
Georgia Erbez
Chief Financial Officer