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Alpine Immune Sciences

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FY2021 Annual Report · Alpine Immune Sciences
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K

☒

☐

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

For the fiscal year ended December 31, 2021

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 Number 001-37449

ALPINE IMMUNE SCIENCES, INC.

(Exact name of Registrant as specified in its Charter)

Delaware
(State or other jurisdiction of
incorporation or organization)

188 East Blaine Street Suite 200

Seattle, WA

(Address of principal executive offices)

20-8969493
(I.R.S. Employer
Identification No.)

98102
(Zip Code)

Securities registered pursuant to Section 12(b) of the Act:

Registrant’s telephone number, including area code: (206) 788-4545

Title of each class
Common Stock, par value $0.001 per share

Trading Symbol
ALPN

Name of each exchange on which registered
The Nasdaq Stock Market LLC

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 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 and posted 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 the
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 has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section
404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☐
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 30, 2021, was approximately $104.8 million. Shares of common stock held by each executive officer and director and by each other person who may be deemed to be an affiliate
of the registrant, have been excluded from this computation. The determination of affiliate status for this purpose is not necessarily a conclusive determination for other purposes.
The number of shares of the registrant’s common stock outstanding as of March 7, 2022 was 30,294,434.

DOCUMENTS INCORPORATED BY REFERENCE

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Portions of the Registrant’s Definitive Proxy Statement relating to the 2022 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission

subsequent to the date hereof, are incorporated by reference into Part III of this Report. Such Proxy Statement will be filed with the Securities and Exchange Commission not later than 120 days
following the end of the Registrant’s fiscal year ended December 31, 2021.

Table of Contents

Summary Risk Factors
Forward-Looking Statements

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
[Reserved]
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
Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

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

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.

Item 9C.

PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV
Item 15.

Page

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In this report, unless otherwise stated or as the context otherwise requires, references to “Alpine,” “the Company,” “we,” “us,” “our” and similar
references refer to Alpine Immune Sciences, Inc. All rights reserved. “NEON-1," "NEON-2," "Synergy," and the Alpine logo are registered trademarks or
trademarks of Alpine Immune Sciences, Inc. in various jurisdictions.This report also contains registered marks, trademarks, and trade names of other
companies. All other trademarks, registered marks, and trade names appearing in this report are the property of their respective holders.

i

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Summary Risk Factors

Our business is subject to numerous risks and uncertainties, including those highlighted in the section of this report captioned “Risk Factors.” The

following is a summary of the principal risks we face:

•

•

•

Our approach to the discovery and development of innovative therapeutic treatments based on our technology is unproven and may not result
in marketable products.

Our therapeutic candidates are in early stages of development and may fail in development or suffer delays that materially and adversely
affect their commercial viability.

Product development involves a lengthy and expensive process with an uncertain outcome, and results of earlier preclinical and clinical trials
may not be predictive of future clinical trial results.

• We face competition from entities that have developed or may develop therapeutic candidates for our target disease indications, including

companies developing novel treatments and technology platforms based on modalities and technology similar to us. If these companies
develop technologies or therapeutic candidates more rapidly than we do, or their technologies, including delivery technologies, are more
effective, our ability to develop and successfully commercialize therapeutic candidates may be adversely affected.

•

•

To date, our revenue has been primarily derived from our collaboration agreements, and our success will be dependent, in part, on our
collaborators’ efforts to develop our therapeutic candidates.

If third parties on which we depend to conduct our clinical or preclinical studies, or any future clinical trials, do not perform as expected, fail
to satisfy regulatory or legal requirements, or miss expected deadlines, our development program could be delayed, which may result in
materially adverse effects on our business, financial condition, results of operations, and prospects.

• We may not successfully engage in strategic transactions, including any additional collaborations we seek, which could adversely affect our
ability to develop and commercialize therapeutic candidates, impact our cash position, increase our expenses, and present significant
distractions to our management.

•

•

If any of our therapeutic candidates are approved for marketing and commercialization and we are unable to develop sales, marketing and
distribution capabilities on our own or enter into agreements with third parties to perform these functions on acceptable terms, we may be
unable to successfully commercialize any such future products.

The COVID-19 coronavirus could adversely impact our business, including our clinical trials.

• We depend on our information technology systems and any failure of these systems could harm our business.

• We will need to raise substantial additional funds to advance development of our therapeutic candidates, and we cannot guarantee we will

have sufficient funds available in the future to develop and commercialize our current or future therapeutic candidates.

• We are an early stage biopharmaceutical company with a history of losses, we expect to continue to incur significant loses for the foreseeable
future, we may never achieve or maintain profitability, and we have a limited operating history that may make it difficult for investors to
evaluate the potential success of our business.

•

If we are not able to obtain and enforce patent protection for our technology, including therapeutic candidates, therapeutic products, and
platform technology, development of our therapeutic candidates and platform, and commercialization of our therapeutic products may be
materially and adversely affected.

• We may license patent rights from third-party owners or licensees. If such owners or licensees do not properly or successfully obtain,

maintain or enforce the patents underlying such licenses, or if they retain or license to others any competing rights, our competitive position
and business prospects may be materially and adversely affected.

• We or our licensors, collaborators, or any future strategic partners may become subject to third-party claims or litigation alleging infringement
of patents or other proprietary rights or seeking to invalidate patents or other proprietary rights, and we may need to resort to litigation to
protect or enforce our patents or other proprietary rights, all of which could be costly, time consuming, delay or prevent the development of
our therapeutic candidates and commercialization of our therapeutic products, or put our patents and other proprietary rights at risk.

•

If we fail to comply with our obligations under any license, collaboration, or other agreements, we may be required to pay damages and could
lose intellectual property rights necessary for developing and protecting our technology, including our platform technology, therapeutic
candidates, and therapeutic products, or we could lose

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certain rights to grant sublicenses, either of which could have a material adverse effect on our results of operations and business prospects.

• We may be unable to obtain U.S. or foreign regulatory approval and, as a result, may be unable to commercialize our therapeutic candidates.

•

•

•

The healthcare industry is heavily regulated in the U.S. at the federal, state, and local levels, and our failure to comply with applicable
requirements may subject us to penalties and negatively affect our financial condition.

Our stock price may be volatile, and an active, liquid, and orderly trading market may not develop for our common stock. As a result,
stockholders may not be able to resell shares at or above their purchase price.

Our officers and directors, and their respective affiliates, have a controlling influence over our business affairs and may make business
decisions with which stockholders disagree and which may adversely affect the value of their investment.

Our Risk Factors are not guarantees that no such conditions exist as of the date of this report and should not be interpreted as an affirmative

statement that such risks or conditions have not materialized, in whole or in part.

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Forward-Looking Statements

This Annual Report on Form 10-K contains forward-looking statements and information within the meaning of Section 27A of the Securities Act of
1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are subject to the “safe harbor” created by those sections.
In some cases you can identify these statements by forward-looking words such as “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,”
“intend,” “could,” “would,” “project,” “plan,” “expect,” or similar expressions, or the negative or plural of these words or expressions. You should read
these statements carefully because they discuss future expectations, contain projections of future results of operations or financial condition, or state other
“forward-looking” information. These statements relate to our future plans, objectives, expectations, intentions and financial performance and the
assumptions that underlie these statements. These forward-looking statements include, but are not limited to:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

our ability to identify, develop and commercialize additional products or product candidates;

our estimates regarding our expenses, revenues, anticipated capital requirements and our needs for additional financing;

our ability to obtain funding for our operations;

the implementation of our business model and strategic plans for our business and technology;

the timing of the commencement, progress and receipt of data from any of our preclinical and clinical trials;

the expected results of any preclinical or clinical trial and the impact on the likelihood or timing of any regulatory approval;

the scope of protection we are able to establish and maintain for intellectual property rights covering our technology and product candidates;

the anticipated impact of the COVID-19 pandemic on our business, research and clinical development plans and timelines and results of
operations;

the timing or likelihood of regulatory filings and approvals;

the therapeutic benefits, effectiveness and safety of our product candidates;

the rate and degree of market acceptance and clinical utility of any future products;

our ability to maintain and establish collaborations;

our ability to achieve milestones in our current and any future collaborations;

our expectations regarding market risk, including interest rate changes;

our expectations regarding the sufficiency of our cash and cash equivalents to fund operations for at least the next 12 months;

developments relating to our competitors and our industry; and

our expectations regarding licensing, acquisitions and strategic operations.

    These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those anticipated
in the forward-looking statements. Factors that might cause such a difference include, but are not limited to, those discussed in this report in Part I, Item
1A. Risk Factors, and elsewhere in this report. Forward-looking statements are based on our management’s beliefs and assumptions and on information
currently available to our management. These statements, like all statements in this report, speak only as of their date, and we undertake no obligation to
update or revise these statements in light of future developments, except as required by law.

    In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based
upon information available to us as of the date of this report, and while we believe such information forms a reasonable basis for such statements, such
information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review
of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these
statements.

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PART I

Item 1. Business

Overview

We are a clinical-stage biopharmaceutical company dedicated to discovering and developing innovative, protein-based immunotherapies to treat

cancer and autoimmune and inflammatory diseases. Our approach includes a proprietary scientific platform that converts native immune system proteins
into differentiated, multi-targeted therapeutics. We believe our strategies are capable of meaningfully modulating the human immune system and
significantly improving outcomes in patients with serious diseases.

Autoimmune/Inflammatory Diseases

ALPN-101, or acazicolcept, is a dual Inducible T cell Costimulator, or ICOS, and CD28 antagonist intended for the treatment of autoimmune and

inflammatory diseases. Preclinical studies with acazicolcept have demonstrated efficacy in models of systemic lupus erythematosus, or SLE, Sjögren’s
syndrome, or SjS, arthritis, inflammatory bowel disease, multiple sclerosis, type 1 diabetes, uveitis, and graft versus host disease. We have evaluated
acazicolcept in a Phase 1 healthy volunteer study and initiated patient dosing in Synergy, a global, randomized, double-blind, placebo-controlled Phase 2
study of acazicolcept in adults with moderate-to-severe SLE. In June 2020, we entered into an Option and License Agreement with AbbVie Ireland
Unlimited Company, or AbbVie, which grants AbbVie an exclusive option to take an exclusive license to acazicolcept. Through December 31, 2021, we
have received $105.0 million in upfront and pre-option exercise development milestones as part of the Option and License Agreement with AbbVie, or the
AbbVie Agreement.

ALPN-303 is a dual B cell cytokine antagonist, being developed for the treatment of B cell mediated inflammatory and autoimmune diseases.

Engineered using our proprietary directed evolution platform, ALPN-303 potently inhibits the pleiotropic B cell cytokines B cell activating factor (BAFF,
BLyS) and a proliferation inducing ligand (APRIL), which play key roles in B cell development, differentiation, and survival, and together contribute to the
pathogenesis of multiple autoimmune diseases such as SLE and many other autoantibody-related inflammatory diseases. Data presented at the American
College of Rheumatology (ACR) Convergence 2021 Annual Meeting demonstrated that ALPN-303 inhibits the activity of the B cell cytokines APRIL and
BAFF more potently than wild-type TACI-Fc counterparts, as well as anti-BAFF and anti-APRIL monoclonal antibodies. In addition, ALPN-303 has been
well-tolerated in preclinical models and exhibited superior pharmacokinetics and pharmacodynamics over wild-type TACI-Fc counterparts, including
superior serum exposure, suppression of T-dependent antibody production, and/or serum immunoglobulins in mice and/or cynomolgus monkeys. A first-in-
human, Phase 1 study of ALPN-303 in healthy volunteers was initiated in the fourth quarter of 2021, with top-line results targeted by mid-2022. This
randomized, placebo-controlled study is designed to evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamics of ALPN-303 administered
intravenously and subcutaneously. We are planning to initiate patient-based studies in the second half of 2022 including SLE, and possibly other
autoantibody-related diseases in other therapeutic areas.

In December 2021, we entered into an exclusive license and collaboration agreement, or the Horizon Agreement, with Horizon Therapeutics Ireland

DAC, or Horizon, for the development and commercialization of up to four preclinical candidates generated from our unique discovery platform for
autoimmune and inflammatory diseases. Under the terms of the agreement, Horizon made an upfront payment to us of $25.0 million as well as an equity
investment for which they paid $15.0 million, a 25 percent premium to the 30-day volume-weighted average share price as of December 9, 2021. In
addition, we are eligible to receive up to $381.0 million per program, or approximately $1.5 billion in total, in future success-based payments related to
development, regulatory and commercial milestones as well as tiered royalties on global net sales.

Immuno-oncology

Our lead oncology program is ALPN-202, or davoceticept, a conditional CD28 costimulator and dual checkpoint inhibitor intended for the
treatment of cancer. Preclinical in vivo data have demonstrated monotherapy efficacy in tumor models superior to approved therapies. In June 2020, we
initiated NEON-1, a Phase 1 monotherapy dose escalation and expansion study in patients with advanced malignancies. Initial data from NEON-1 were
presented at the 2021 American Society of Clinical Oncology (ASCO) Virtual Meeting demonstrating that davoceticept was well-tolerated as of the cutoff
date (April 22, 2021) with evidence of peripheral T cell modulation consistent with CD28 agonism. In addition, although most enrolled participants had
tumors considered classically non-responsive to immunotherapies, the majority derived clinical benefit as defined as a best outcome of stable disease or
better. Completion of dose escalation for NEON-1 and initiation of expansion cohorts is anticipated in the first half of 2022.

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In June 2021, we announced a collaboration and supply agreement with Merck to evaluate the safety and efficacy of davoceticept in combination

with Merck’s anti-PD-1 therapy KEYTRUDA® (pembrolizumab) in a Phase 1 dose escalation and expansion study. The clinical trial, NEON-2, was
initiated in June 2021and is currently subject to a partial clinical hold. As discussed further below, on March 7, 2022, we announced that the FDA placed a
partial clinical hold on the NEON-2 trial in response to the death of a study participant in the NEON-2 trial. The participant’s death was attributed to
cardiogenic shock, considered by the treating physicians as likely related to immune-mediated myocarditis, or possibly infection. Participants who are
currently enrolled in the NEON-2 trial may continue to receive davoceticept and pembrolizumab, although no new participants may be enrolled until the
partial clinical hold is resolved. This partial clinical hold does not affect the ongoing NEON-1 clinical trial of davoceticept as monotherapy
(NCT04186637).

Our scientific platform has also generated immune modulatory proteins with the potential of improving engineered cellular therapies such as

chimeric antigen receptor T cells, T cell receptor-engineered T cells, and tumor infiltrating lymphocytes. In May 2019, we signed a collaboration and
license agreement with Adaptimmune Therapeutics plc, or Adaptimmune, to develop next-generation SPEAR™ T cell products which incorporate our
secreted and transmembrane immunomodulatory protein (termed SIP™ and TIP™) technology. We intend to continue to leverage our existing pipeline and
platform to actively explore and evaluate potential value-creating partnering opportunities.

Our Strategy

Our goal is to discover and develop modern therapies to treat patients with serious conditions such as cancer and autoimmune/inflammatory

diseases. To achieve our goals, we intend to:

•

•

•

aggressively move our lead autoimmune/inflammatory program acazicolcept through clinical development as part of the AbbVie Agreement,
including conducting Synergy, our Phase 2 study for the treatment of SLE;

aggressively move our second autoimmune/inflammatory program ALPN-303 through a Phase 1 study in healthy volunteers and into patient-
based studies for the treatment of B cell mediated autoimmune/inflammatory diseases;

aggressively move our lead oncology program davoceticept through clinical development for the treatment of cancer, and;

• maximize the value of our pipeline and platform via potential partnering activities.

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Product Pipeline

We have a diverse pipeline of novel therapies, as shown in Figure 1 below.

Our Scientific Platform

Figure 1

The human immune system is a complex network of biological processes and structures evolved to protect humans from external infections and

harmful changes of internal cells. Within the immune system, proteins play a key role in a variety of essential functions, including recognition of foreign
and self-antigens, cell adhesion and trafficking, and modulation of cellular activity through costimulatory or inhibitory signaling. Our scientific platform
seeks to develop novel therapeutics by engineering native, or so-called “wild-type,” proteins with unique properties that may benefit patients with cancer or
inflammatory diseases. We have focused our efforts to-date on two major protein superfamilies that play critical roles in the regulation of immune cell
signaling and activity: the immunoglobulin superfamily, or IgSF, and the tumor necrosis factor (receptor) superfamily, or TNFSF/TNFRSF.

The IgSF is the largest family of adhesion, costimulatory (activating), and inhibitory (blocking) proteins found on the surface of immunological,

neurological, and other human cell types. These cell surface and soluble molecules are broadly involved with recognition of antigens, assisting in the
formation of the immune synapse, and performing costimulatory, coinhibitory, and cytokine receptor signaling functions. This family includes many well-
known targets, such as those seen in Figure 2. We believe the IgSF protein family members may be particularly valuable because many IgSF proteins
naturally bind multiple binding partners, also referred to as “counterstructures.” Acazicolcept and davoceticept are both derived from members of the IgSF.

TNFSF/TNFRSF proteins are expressed broadly in the immune system and play a critical role in immune cell signaling and proliferation.

TNFSF/TNFRSF members are composed of 48 unique proteins that are structurally similar and are

Figure 2

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characterized by their ability to bind to trimeric tumor necrosis factors (Figure 3). Members of the TNFSF/TNFRSF include many clinically relevant
targets with applications in both autoimmune disease and immuno-oncology (e.g., CD40, TACI, BCMA, 4-1BB, TNFα).

The TNF Superfamily

Figure 3

Our scientists create engineered proteins from IgSF members (variant immunoglobulin domains, or vIgDs) and TNFSF/TNFRSF members (variant

TNF domains, or vTDs). We use directed evolution, which is an iterative scientific engineering process purposefully conducted to modify an IgSF and
TNFSF/TNFRSF protein for a desired therapeutic function. The potential to create therapies capable of working within a formed immune synapse, forcing
a synapse to occur, or preventing a synapse from occurring are important, novel attributes of our scientific platform.

Figure 4 illustrates the process of directed evolution in our scientific platform. Our scientists utilize yeast display protein library strategies to

identify variants of wild-type proteins with desired binding characteristics. We start with a wild-type IgSF or TNFSF/TNFRSF protein and then enter a
cycle of library generation and yeast display. Flow cytometry or other methods are used to sort for yeast clones displaying variants with desired binding
characteristics. Biologic and biophysical assays of purified proteins assess biological function and manufacturing characteristics. The end product is an
optimized vIgD or vTD. Additional cycles can be carried out by building next generation libraries from the output of prior libraries to result in further
optimization.

Figure 4

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Our scientific platform is generally able to improve upon native IgSF or TNFSF/TNFRSF activity regardless of whether natural binding affinity is
weak or strong. When starting affinity is very weak, techniques employed by our scientists have accomplished several thousand-fold increases in binding
affinity with sometimes as few as two library generation cycles. Even when starting affinity is very high, our scientific platform can still improve binding
affinities. The same general strategies can be used when the desired therapeutic profile requires reduced affinity compared to the wild-type protein. We
have applied our scientific platform to several IgSF and TNFSF/TNFRSF protein targets.

We believe our vIgDs and vTDs are highly flexible. In many cases, a single affinity-maturation campaign can result in multiple domains suitable for

use in the formats such as those illustrated in Figure 5 and further described below.

vIgD-Fc or vTD-Fc

Figure 5

A vIgD- or vTD-Fc fusion protein is the simplest format. Our lead autoimmune/inflammatory program, acazicolcept, and lead oncology program,
davoceticept, are both examples of vIgD-Fc formats. ALPN-303 is an example of a vTD-Fc format. The engineered vIgD or vTD protein is fused to an Fc
backbone. Combining vIgDs or vTDs with antibody Fc domains to make Fc fusion proteins potentially allows for better expression, facilitates purification,
and improves pharmacokinetic (dosing) properties. Fc fusion proteins are a standard format in the industry, with examples such as etanercept, abatacept,
and belatacept. A vIgD- or vTD-Fc could potentially be administered intravenously, subcutaneously, topically, or via other methods of delivery.

Cell Therapy Enhancement

Our scientific platform has also generated immune modulatory proteins with the potential of improving engineered cellular therapies, such as CAR-

Ts, TCR-Ts, or TILs.

Acazicolcept, a Dual ICOS/CD28 Antagonist for Autoimmune/Inflammatory Diseases

Our lead autoimmune/inflammatory disease program, acazicolcept, is an Fc fusion protein of a human inducible T cell costimulator ligand, or
ICOSL, vIgD designed to inhibit simultaneously the CD28 and ICOS T cell costimulatory pathways (Figure 6). This vIgD is fused to an “effectorless” Fc
backbone and is intended for the potential treatment of autoimmune/inflammatory diseases. Notably, acazicolcept is not a bispecific antibody construct. A
traditional bispecific might be constructed of one domain binding ICOS and one domain binding CD28. Instead, acazicolcept makes use of a novel single
vIgD domain capable of binding both ICOS and CD28 engineered by our scientists using our proprietary scientific platform.

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Figure 6

CD28 has been long recognized to be required for naïve T cell activation. The therapeutic inhibitors of the CD28 pathway (e.g., abatacept, CTLA4-
Ig; and belatacept, a second generation CTLA4-Ig) have proven valuable for the treatment of some inflammatory arthritis conditions (rheumatoid arthritis,
juvenile idiopathic arthritis, psoriatic arthritis) and for the prevention of renal allograft rejection or graft versus host disease. However, therapeutic blockade
of the CD28 pathway, primarily as studied with abatacept, has not been successful in several other inflammatory diseases (e.g., Crohn’s disease, lupus
nephritis, multiple sclerosis) despite extensive evidence implicating T cells in disease pathogenesis and evidence of clinical biological activity. This
suggests an additional pathogenic costimulatory pathway(s) remains unaddressed.

ICOS is part of the CD28 costimulatory family of molecules, including PD-1, CD28, and CTLA-4. ICOS is related to CD28, but, in contrast, is

poorly expressed in naïve T cells. ICOS is, however, rapidly induced upon T cell activation. It appears to be a dominant costimulatory pathway in at least
some effector or pathogenic T cells, such as potentially in the absence of CD28. Elevated levels of ICOS‑expressing T cells have been described in an
increasing number of autoimmune/inflammatory diseases, correlating with disease activity. At the same time, inhibition of ICOS is effective in several
preclinical inflammatory disease models. The ICOS pathway may therefore represent a major costimulatory pathway, nonredundant with CD28, and highly
relevant to autoimmune/inflammatory diseases.

We have performed a number of preclinical experiments demonstrating acazicolcept is active in both in vitro and in vivo models, several of which

are described below.

A potent immunomodulator of diseased cells

Acazicolcept inhibits cytokine production from human peripheral blood mononuclear cells in vitro more potently than single CD28 (abatacept, or

CTLA4-Ig) or ICOS (prezalumab, or anti-ICOSL mAb) pathway inhibitors alone or in combination (Figure 7).

Figure 7

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Sjögren’s Syndrome Model

Sjögren’s syndrome is an autoimmune disease in which immune cells attack the glands that produce saliva and tears, as well as other internal

organs. In an animal model of salivary gland inflammation (sialoadenitis), a key organ manifestation of Sjögren’s syndrome, acazicolcept appeared more
efficacious in reducing the incidence and severity of sialadenitis as compared to abatacept or wild-type ICOSL-Fc alone or in combination. These data were
presented at the 2019 annual meeting of the ACR. (Figure 8)

Systemic Lupus Erythematosus Model

Figure 8

Acazicolcept has demonstrated efficacy in a preclinical model of SLE, a multiorgan autoimmune disease that that can lead to serious organ
complications and death. In Figure 9, which evaluated acazicolcept in a bm12 inducible model of SLE, treatment with acazicolcept reduced serum titers of
anti-dsDNA autoantibodies throughout the study compared to Fc control treatment. These data were presented at the 2019 annual meeting of the ACR. We
evaluated acazicolcept in a Phase 1 healthy volunteer study and in the second quarter of 2021 initiated patient dosing in Synergy, a global, randomized,
double-blind, placebo-controlled Phase 2 study of acazicolcept in adults with moderate-to-severe SLE.

Figure 9

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Arthritis Model

Figure 10 shows data from an in vivo collagen-induced arthritis model. This model is designed to test a drug’s ability to reduce inflammatory

signals thought to play a role in rheumatoid arthritis, psoriatic arthritis, and other types of inflammatory arthritis conditions. In the data presented at the
2019 annual meeting of the American College of Rheumatology, acazicolcept was superior to abatacept, a drug approved by the FDA to treat rheumatoid,
psoriatic, and juvenile idiopathic arthritis.

Human Xenograft GVHD Model

Figure 10

Acazicolcept has been studied in an in vivo mouse model of GVHD, a damaging and potentially fatal inflammatory disease frequently observed
following allogeneic stem cell and/or bone marrow transplant treatments for cancer or other serious diseases. The results represented in Figure 11 show
acazicolcept had superior survival when dosed three times per week for four weeks compared to belatacept (an FDA-approved drug for prevention of renal
allograft rejection - a type of inflammation-related rejection process analogous to GVHD. Belatacept is a more potent variant of abatacept, which is FDA-
approved for the prevention of GVHD). In fact, 100% of acazicolcept multi-dose treated animals across three different dose levels survived. Animals given
only a single dose of acazicolcept performed comparably to animals treated with belatacept dosed 3x/week for four weeks, demonstrating the potency and
efficacy of acazicolcept in this disease model.

Summary of acazicolcept Program Preclinical Data

Figure 11

Our scientists and collaborators have demonstrated in in vivo preclinical studies that acazicolcept:

•

•

demonstrates a lower incidence and severity of sialadenitis, a model of Sjögren’s syndrome, as compared to abatacept or wild-type ICOSL-Fc
alone or in combination;

reduces levels of pathogenic anti-dsDNA autoantibodies compared to an Fc control in an animal model of SLE;

11

•

•

•

•

reduces disease severity and delays disease onset time relative to control in an in vivo arthritis model with activity superior to abatacept, an
FDA-approved drug for rheumatoid, psoriatic, and juvenile idiopathic arthritis;

improves survival compared to belatacept in a humanized in vivo mouse GVHD model;

demonstrates control of colitis in an animal model of inflammatory bowel disease, or IBD; and

shows improved disease scores in an animal model of multiple sclerosis, or MS, compared to abatacept.

Acazicolcept Clinical Development

We have completed a Phase 1 study of acazicolcept in healthy volunteers (NCT03748836). This study was designed to evaluate the safety and
tolerability of single and multiple ascending intravenous and/or subcutaneous doses of acazicolcept. In addition, pharmacokinetics, pharmacodynamics and
exploratory biomarkers were evaluated to help determine acazicolcept’s potential for the treatment of autoimmune/inflammatory diseases. Results of the
study were presented at the 2020 European Alliance of Associations for Rheumatology (EULAR) E-Congress and published in the peer-reviewed journal
Clinical Translational Science (doi:10.1111/cts.12983). The first-in-human study randomized 96 healthy adults to receive single or multiple, intravenous or
subcutaneous, placebo or acazicolcept at doses ranging from 1 μg/kg to 10 mg/kg. At all dose levels, acazicolcept was well-tolerated, with no severe
adverse events, clinically-significant immunogenicity events, or evidence of cytokine release. Pharmacokinetics and pharmacodynamics (Figure 12)
exhibited desirable dose dependence, with increasing doses corresponding to increasing duration of complete, or near-complete target saturation, as well as
inhibition of antibody responses to keyhole limpet hemocyanin, or KLH, immunization.

Supported by these results, and as part of the AbbVie Agreement, we initiated Synergy, an international, double-blind placebo-controlled Phase 2

study of acazicolcept in patients with SLE in mid-2021.

Figure 12

Davoceticept, a Conditional CD28 Costimulator and Dual PD-L1/CTLA-4 Inhibitor for Oncology

Immune checkpoint blockade using inhibitors of the cytotoxic T-lymphocyte antigen 4, or CTLA-4, or programmed death 1, or PD-1, pathways

have been therapeutically successful for a wide variety of malignancies, dramatically altering the

12

treatment paradigm in oncology. However, the majority of patients treated with an inhibitor of CTLA-4, PD-1, or programmed death-ligand 1, or PD-L1,
fail to respond or develop resistance, indicating that additional strategies to improve anti-tumor immunity and responses remain needed to improve
outcomes. Because immune checkpoints like PD-1 and CTLA-4 appear to suppress anti-tumor immune responses in part by inhibiting the activating signals
mediated by cluster of differentiation 28, or CD28 (Figure 13), next generation immunotherapeutic strategies may substantially improve anti-tumor
responses by activating a T cell (co-)stimulatory pathway(s) while also inhibiting a checkpoint pathway(s). Preferably, such activity might be focused
primarily within the tumor microenvironment to limit potential systemic immune activation and toxicity.

Davoceticept is an Fc fusion protein of a modified human cluster of differentiation 80, or CD80, vIgD designed to block the inhibitory immune

checkpoints PD-L1 and CTLA-4, and to provide PD-L1-dependent T cell activation via CD28 costimulatory receptor. As illustrated in Figure 14,
davoceticept binds PD-L1 expressed on the tumor, blocking PD-L1/PD-1 interactions. Localized to the tumor, davoceticept is able to provide a CD28
signal to T cells (PD-L1-dependent CD28 costimulation). Additionally, davoceticept binds CTLA-4 expressed on T cells and blocks CTLA4-CD80/CD86
interactions.

Figure 13

13

Using in vitro assays, we have characterized and validated the three primary mechanisms of action of davoceticept: conditional CD28 costimulation

and dual PD-L1/CTLA-4 inhibition (Figure 15). Importantly, CD28 costimulation with davoceticept requires both T cell receptor, or TCR, signaling and
expression of PD-L1 on the antigen presenting cell, or APC. PD-L1 dependent T cell costimulation is a unique and key attribute of davoceticept which we
believe may limit the risk for systemic toxicity while providing potent anti-tumor activity.

Figure 14

Figure 15

14

Davoceticept has also been validated in in vivo tumor models. In a mouse model where mice were implanted with MC38 mouse colon cancer

tumors transfected with human PD-L1, davoceticept as a monotherapy demonstrated superior tumor control compared to durvalumab, an FDA-approved
anti-PD-L1 monoclonal antibody (Figure 16).

16                        Figure 17

 Figure

When tumor-free mice in the davoceticept arm were re-challenged with additional tumors, they continued to be tumor free despite no additional

doses of davoceticept. (Figure 17)

The effects of davoceticept or durvalumab on various components of the immune system were compared using a technique called RNA sequencing
in the tumor model. This technique generates a display of inflammatory gene signatures where green represents lower or no upregulation of inflammatory
genes and red represents higher upregulation of inflammatory genes. For the treatment of cancer, it is thought the more upregulation of the immune system
- indicated by higher upregulation of inflammatory genes - potentially results in better outcomes for patients. As seen in Figure 18 below, davoceticept
upregulates a broader variety of different inflammatory genes connected with several different types of immune cells compared to durvalumab.

Summary of davoceticept Preclinical Data

We have demonstrated in preclinical studies that davoceticept:

Figure 18

•

•

•

•

exhibits three primary mechanisms of action: conditional CD28 costimulation and dual PD-L1/CTLA-4 inhibition;

improves tumor control in a human PD-L1 transduced mouse model of colon cancer compared to the FDA approved anti PD-L1 therapeutic
durvalumab;

demonstrates a more robust intra-tumor inflammatory signature in the mouse colon cancer model than durvalumab, potentially indicating
superior immune system upregulation to fight cancer; and

has the potential to be used as a monotherapy or in combination with standard of care chemotherapy or checkpoint only inhibition.

Davoceticept Clinical Development

In June 2020, we initiated enrollment in NEON-1, our Phase 1 study in patients with advanced malignancies (Figure 19). NEON-1 enrolls adults

with advanced solid tumors or lymphoma refractory or resistant to standard therapy, including checkpoint inhibitors when indicated. Measurable disease is
required for most participants, as are an ECOG status of 0 to 2 and adequate hematological, renal, and hepatic function. Safety endpoints include dose-
limiting toxicities, adverse events, and

15

circulating cytokines. Objective responses will be assessed by RECIST v1.1 for solid tumors and Lugano criteria for lymphoma. Pharmacokinetics and
pharmacodynamics will also be evaluated. More information is available at www.clinicaltrials.gov (NCT04186637).

Initial data from NEON-1 were presented at the 2021 ASCO Virtual Meeting demonstrating that davoceticept was well-tolerated as of the cutoff
date (April 22, 2021) with evidence of peripheral T cell modulation consistent with CD28 agonism. In addition, although most enrolled participants had
tumors considered classically non-responsive to immunotherapies, the majority derived clinical benefit as defined as a best outcome of stable disease or
better (Figure 20). Completion of dose escalation for NEON-1 and initiation of monotherapy expansion cohorts, initially cutaneous melanoma and PD-L1+
(non-melanoma) tumors, is anticipated in the first half of 2022.

Figure 19

In June 2021, we announced a collaboration and supply agreement with Merck to evaluate the safety and efficacy of davoceticept in combination

with Merck’s anti-PD-1 therapy KEYTRUDA® (pembrolizumab) in a Phase 1 dose escalation and

Figure 20

16

expansion study. The clinical trial, NEON-2, was initiated in June 2021. More information for both NEON-1 (NCT04186637) and NEON-2
(NCT04920383) is available at www.clinicaltrials.gov.

On March 7, 2022, we announced that the FDA placed a partial clinical hold on the NEON-2 trial evaluating davoceticept in combination with

pembrolizumab in adults with advanced malignancies. This partial clinical hold was prompted by report of a death of a study participant in the NEON-2
trial. The participant had choroidal melanoma previously treated with nivolumab and ipilimumab, and had received a single dose each of davoceticept and
pembrolizumab. The participant’s death was attributed to cardiogenic shock, considered by the treating physicians as likely related to immune-mediated
myocarditis, or possibly infection. We are working closely with the FDA, Merck, the study Safety Monitoring Committee, and the study investigators to
further understand this event and to evaluate the appropriate safety precautions before we resume enrollment of additional participants. Participants who are
currently enrolled in the NEON-2 trial may continue to receive davoceticept and pembrolizumab, although no new participants may be enrolled until the
partial clinical hold is resolved. This partial clinical hold does not affect the ongoing NEON-1 clinical trial of davoceticept as monotherapy
(NCT04186637).

ALPN-303, a Dual B Cell Cytokine Antagonist for B Cell-Mediated Autoimmune/Inflammatory Diseases

ALPN-303 is a dual B cell cytokine antagonist, being developed for the treatment of B cell mediated inflammatory and autoimmune diseases.

Engineered using our proprietary directed evolution platform, ALPN-303 is an Fc fusion protein of a human transmembrane activator and CAML
interactor, or TACI, variant TNFR domain, or vTD, that potently inhibits the pleiotropic B cell cytokines BAFF and APRIL. It mediates significantly
improved combined BAFF and APRIL inhibition in vitro and enhanced pharmacokinetic and immunomodulatory properties in vivo, as compared to wild-
type, or WT, TACI-Fc molecules. BAFF and APRIL are TNF superfamily members that bind TACI, BCMA, and/or BAFF-R on B cells and together
support B cell development, differentiation, and survival. Their co-neutralization dramatically reduces B cell survival and function, including antibody
production, whereas inhibition of either BAFF or APRIL alone mediates only modest effects (Figure 21). B cell targeting therapies like the WT TACI-Fc
fusions atacicept and telitacicept have demonstrated promising clinical potential in B cell-related diseases like SLE but have not yet clearly exhibited long-
term and/or complete disease remissions. ALPN-303, with enhanced inhibitory activity against BAFF & APRIL, could further improve clinical outcomes.

Data on ALPN-303 presented at the ACR Convergence 2021 Annual Meeting demonstrated that ALPN-303 inhibited the activity of the B cell

cytokines APRIL and BAFF more potently than wild-type TACI-Fc counterparts, as well as anti-BAFF and anti-APRIL monoclonal antibodies. In Figure
22, ALPN-303 inhibited BAFF- and APRIL-mediated signaling in vitro with significantly lower IC50 values than WT TACI-Fc, anti-BAFF mAb, and anti-
APRIL mAb comparators.

Figure 21

17

Administration of ALPN-303 rapidly and significantly reduced key B lymphocyte subsets including plasma cells, germinal center, and follicular B

cells in a KLH immunization mouse model (Figure 23).

Figure 22

Figure 23

18

Furthermore, treatment with ALPN-303 potently suppressed anti-dsDNA auto antibodies, proteinuria, sialoadenitis, kidney lesions, and renal

immune complex deposition in the (NZBxNZW)F1 lupus model (Figure 24).

ALPN-303 has been well-tolerated in nonclinical studies (Figure 25) and exhibited superior pharmacokinetics and pharmacodynamics than wild-
type TACI-Fc counterparts, including superior serum exposure and pharmacodynamic reduction of serum immunoglobulins in mice and/or cynomolgus
monkeys (Figure 26). Based on these data, we believe that ALPN-303 represents an attractive development candidate for the treatment of multiple
autoimmune and inflammatory diseases, including SLE and other autoantibody-mediated diseases.

Figure 24

Figure 25

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ALPN-303 Clinical Development

Figure 26

Enrollment in a first-in-human, Phase 1 study of ALPN-303 in healthy volunteers began in the fourth quarter of 2021, with top-line results targeted

by mid-2022. This randomized, placebo-controlled study is designed to evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamics of
ALPN-303 administered intravenously and subcutaneously. We are planning to initiate patient-based studies in the second half of 2022 including SLE, and
possibly other autoantibody-related diseases in other therapeutic areas.

Other Research Programs

In addition to our acazicolcept, davoceticept, and ALPN-303 programs, we have a number of other research efforts underway to address cancer and

autoimmune/inflammatory diseases that we intend to continue to develop either internally or together with a partner.

Partnerships

In addition to advancing programs internally, we continue to seek partners who can bring therapeutic area experience, development expertise,

commercialization capabilities, and funding to maximize the potential of our existing programs and scientific platform.

Collaboration with Horizon (December 2021)

In December 2021, we entered into the Horizon Agreement, pursuant to which we granted to Horizon rights to one of our existing preclinical biologic
therapeutic programs, or the Existing Program, and agreed to collaborate with Horizon in the discovery, research and preclinical development of up to three
additional autoimmune and inflammatory disease programs for other designated biological targets, or the Research Programs, and products arising from the
Existing Program and the Research Programs, or the Agreement Products.

Existing Program

We granted to Horizon an exclusive, worldwide, royalty-bearing, sublicensable license under our intellectual property rights for the development,
manufacture and commercialization of Agreement Products associated with the Existing Program, or the Existing Program Products, for all applications;
however, Horizon has agreed not to pursue the Existing Program Products for oncology. In addition, we granted to Horizon a non-exclusive license to
access our libraries of proteins and molecules for research, discovery and identification of additional compounds meeting the agreed criteria (subject to
certain exceptions, including compounds reserved by us from the libraries, as set forth in the Horizon Agreement) which would be included in Horizon’s
license.

20

We will conduct our activities under the Existing Program and deliver compounds meeting the agreed criteria pursuant to one or more deliverables

plans as mutually agreed by the parties. In addition, Horizon will pay us for the costs and expenses of conducting such activities under the deliverables
plans.

Research Programs

Under the Horizon Agreement, during a limited research term, we will conduct, together with Horizon, up to three Research Programs for specified
biological targets selected by Horizon (subject to certain exceptions, including targets reserved by us) to discover proteins and molecules with specified
attributes and biological functions, pursuant to a mutually agreed research plan for each such Research Program. Each party has the right to reserve certain
targets and to replace such reserved targets or reserve more targets (up to a fixed number) through a gatekeeper mechanism. We will deliver certain
compounds meeting the agreed criteria for each Research Program as mutually agreed upon by the parties. Horizon will pay us for the costs and expenses
for conducting its activities under the Research Programs. As agreed between the parties, Horizon will own the inventions and intellectual property
developed from the Research Programs or otherwise associated with the Agreement Products arising therefrom.

Governance

The parties will establish a joint research committee composed of an equal number of representatives from each of Alpine and Horizon, which will,
among other responsibilities, oversee and govern the Existing Program and the Research Programs and review and approve research plans. The parties will
also form a joint patent committee comprised of one or two representatives of each party to discuss strategy and facilitate communication and coordination
for prosecution and maintenance of the relevant patents under the Horizon Agreement.

Development, Manufacture, Regulatory and Commercialization.

Horizon will have the sole right and responsibility for the development, manufacturing, regulatory and commercialization of all the Agreement

Products. We will provide Horizon reasonable assistance and cooperation. In addition, we have agreed during the term of the Horizon Agreement not to
conduct or enable any third party to conduct the development, manufacture or commercialization of certain competing products as set forth therein.

Financial Terms

In connection with the transaction, Horizon made an upfront payment to us of $25.0 million as well as an equity investment for which they paid

$15.0 million, a 25 percent premium to the 30-day volume-weighted average share price as of December 9, 2021.

In addition to the upfront payment and equity consideration, Horizon has agreed to make milestone payments to us upon our achievement of certain

preclinical, clinical and regulatory and commercialization milestones, up to an aggregate amount of $381.0 million per program, or approximately $1.5
billion in total, if all milestones are met.

Horizon has further agreed to pay the Company royalties based on future net sales of the Agreement Products. For the Existing Program, such

royalty percentages range from a mid-single digit percentage to a low double-digit percentage of net sales, with the specific royalty rate depending on the
aggregate net sales. For each Research Program, such royalty percentages are in a range of mid-single digit percentages of net sales, with the specific
royalty rate depending on the aggregate net sales. Horizon’s obligations to pay royalties with respect to an Agreement Product and country will expire after
specific criteria for such Agreement Product in such country including it no longer being covered by valid claims of applicable patent rights in such
country, or the Royalty Term. Royalty payments are subject to reduction in specified circumstances, including expiration of patent rights, biosimilar
competition, or Horizon is required to make payments to a third party with respect to an Agreement Product.

Term and Termination

Unless earlier terminated, the Horizon Agreement remains in effect until the expiration of the Royalty Term for all Agreement Products. The

Horizon Agreement is subject to customary termination provisions including termination by a party for the other party’s uncured, material breach.
Additionally, Horizon may terminate the Horizon Agreement with specified prior notice in its entirety or on a Program-by-Program basis, for any or no
reason.

In the event of certain terminations of the Horizon Agreement, at our request, the parties will negotiate one or more licenses for us to develop,

manufacture and commercialize terminated Agreement Products.

21

The Horizon Agreement includes certain other customary terms and conditions, including mutual representations and warranties, indemnification

and confidentiality provisions.

Collaboration with AbbVie (June 2020)

In June 2020, we entered into the AbbVie Agreement, which grants to AbbVie an exclusive option to take an exclusive license to acazicolcept, or

the License Option.

Under the terms of the AbbVie Agreement we granted to AbbVie an exclusive option to obtain an exclusive, royalty-bearing, sublicensable license
to certain intellectual property rights for the research, development and commercialization of acazicolcept and any other molecule owned or controlled by
us that binds to or directly modulates or targets ICOS at certain agreed-upon levels, or the Compounds, on a worldwide basis for all human and non-human
diagnostic, prophylactic and therapeutic uses, subject to certain exceptions set forth in the AbbVie Agreement. The License Option is immediately
exercisable and will expire 90 days following our delivery of the data package described below to AbbVie, subject to certain exceptions, including
clearance under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, or the HSR Act, if required.

Financial Terms

In connection with the execution of the AbbVie Agreement, AbbVie paid us a nonrefundable upfront payment of $60.0 million in cash. If AbbVie

exercises its License Option, they will pay a one-time cash payment of $75.0 million.

In addition to the upfront payment and License Option payment, AbbVie has agreed to make cash payments upon our achievement of certain
development milestones, the Alpine Development Milestones, prior to the exercise of the License Option as set forth in a written development plan, up to
an aggregate amount of $75.0 million. In the second quarter of 2021, we achieved $45.0 million of the Alpine Development Milestones. Following the
exercise of the License Option, AbbVie has agreed to make cash payments of up to $205.0 million upon AbbVie’s achievement of certain development and
commercial milestones and additional cash payments of up to $450.0 million upon AbbVie’s achievement of certain sales-based cash milestones. AbbVie
has further agreed to pay royalties from a high-single digit percentage to a low double-digit percentage of net sales of any pharmaceutical product that
contains a Compound, or a Licensed Product, with the specific royalty rate depending on the aggregate net sales. AbbVie’s obligations to pay royalties with
respect to a Licensed Product and country will expire upon the latest of the expiration of the last to expire valid patent claim applicable to such Licensed
Product in such country, 10 years from the first commercial sale of the Licensed Product in such country, and the expiration of regulatory exclusivity for
such Licensed Product in such country. Royalty payments are subject to reduction in specified circumstances, including expiration of patent rights, if
average net sales decrease by a certain percentage after the introduction of a generic product, or if AbbVie is required to pay amounts to a third party in
order commercialize a Licensed Product in a particular country.

Development Activities

Prior to the exercise of the License Option, we will conduct acazicolcept development efforts as per a development plan providing for, among other
things, the generation of a data package in order for AbbVie to evaluate exercising the License Option and an itemized budget for such activities, including
all activities reasonably necessary to conduct a Phase 2 clinical study of acazicolcept for the treatment of systematic lupus erythematosus; all non-clinical
activities; and all CMC activities agreed to under the development plan. We will be fully responsible for all costs incurred to conduct our activities,
provided that, AbbVie may be responsible for increased costs under the development plan in connection with certain material amendments agreed upon
with AbbVie.

Prior to the exercise of the License Option, we will be solely responsible, at our sole cost and expense, for preparing, filing and maintaining
regulatory documentation, which AbbVie will be entitled to access and review. We will also be responsible for any and all correspondence with the
applicable regulatory authorities and for maintaining all data related to acazicolcept. We will be solely responsible, at our sole cost and expense, for
manufacturing the compounds necessary to complete the development activities consistent with the development plan.

Governance

The parties will establish a joint governance committee, or JGC, composed of an equal number of representatives from each of Alpine and AbbVie,

which will, among other responsibilities, coordinate and oversee the development activities,

22

approve amendments to the development plan and discuss interactions with regulatory authorities. The chairperson of the JGC will be appointed by
AbbVie. AbbVie may disband the JGC, at its sole discretion, following the exercise of the License Option.

Commercialization

Upon AbbVie’s exercise of the License Option, AbbVie and its affiliates will be solely responsible, at AbbVie’s sole cost and expense, for the

development, manufacture, commercialization, and regulatory compliance of any Licensed Product. Following exercise of the License Option, AbbVie
shall use commercially reasonable efforts to develop and seek regulatory approval for one of the compounds in one indication in each of the United States
and one of the United Kingdom, Germany, France, Spain, or Italy, or the Major Markets, and, following receipt of any such regulatory approval,
commercialize the compound in such country.

Changes in Control

We will notify AbbVie immediately upon the closing of any change in control (as defined in the AbbVie Agreement) during the term of the AbbVie

Agreement. Following the delivery of such notice, AbbVie may, in its sole and absolute discretion, elect to continue the AbbVie Agreement subject to
certain modifications as set forth in the AbbVie Agreement, including the assumption by AbbVie of responsibility to perform certain activities previously
assigned to us.

Term and Termination

Unless earlier terminated, the AbbVie Agreement shall terminate either: (i) in the event that the License Option is not exercised by AbbVie, the first

day following the last day of the License Option exercise period; or (ii) in the event that the License Option is exercised by AbbVie, the date of the
expiration of the last Royalty Term for the last Licensed Product.

Both us and AbbVie may terminate the AbbVie Agreement upon written notice in the event of a material breach by the other party that has not been
cured within a 90-day cure period. However, if the uncured material breach is with respect to AbbVie’s obligation to use commercially reasonable efforts to
obtain regulatory approval for and commercialize a Licensed Product with respect to any Major Market (but not all Major Markets), then we will only be
entitled to terminate the AbbVie Agreement with respect to such Major Market(s). Both AbbVie and us may also terminate the AbbVie Agreement upon
written notice if the other party voluntarily or involuntarily files for bankruptcy or insolvency, makes an assignment for the benefit of creditors, has a
receiver or trustee appointed over substantially all of such other party’s property, proposes or is party to any dissolution or liquidation, or admits in writing
its inability generally to meet such other party’s obligations as they fall due in the general course.

AbbVie may terminate the AbbVie Agreement in its entirety or on a country-by-country basis, for any or no reason, by providing at least 90 days’

prior written notice to us. AbbVie may also terminate the AbbVie Agreement upon notice to us if (i) either we or AbbVie receives a second request for
additional information under the HSR Act, provided AbbVie’s notice of termination is delivered within ten business days after AbbVie becomes aware of
such request or receives notice from us regarding such request or (ii) the License Option has not been exercised or clearance under the HSR Act, if
required, has not occurred within 180 days of submission of the parties’ request for such clearance, provided AbbVie’s notice of termination is delivered
within ten business days after the end of such 180-day period.

Upon the termination of the AbbVie Agreement in its entirety for any reason, all licenses and other rights granted (i) to AbbVie by us and (ii) to us

by AbbVie shall terminate. Upon termination in certain circumstances, AbbVie has agreed to grant to us licenses to certain intellectual property that is
reasonably necessary, and that was actually used by AbbVie for the development, manufacturing or commercialization of the terminated products, to
research, develop and commercialize the terminated products in the terminated countries.

In lieu of terminating the AbbVie Agreement in connection with an uncured material breach or the bankruptcy or insolvency of the Company,
AbbVie may alternatively elect to continue the AbbVie Agreement subject to certain modifications, including that AbbVie will be entitled to conduct
activities allocated to us under the Development Plan, subject to reimbursement by us for AbbVie’s out-of-pocket expenses in connection with such
activities. If AbbVie’s right to terminate in connection with an uncured material breach or the bankruptcy or insolvency of the Company arises before
exercise of the License Option, then the License Option exercise payment amount will be reduced by half and the amount of any then-unearned milestone
payments will be reduced by half. If AbbVie’s right to terminate arises after exercise of the License Option, then the amount of any then-unearned
milestone payments will be reduced by 25%.

The AbbVie Agreement includes certain other customary terms and conditions, including mutual representations and warranties, indemnification

and confidentiality provisions.

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Collaboration with Adaptimmune Therapeutics (May 2019)

In May 2019, we entered into a collaboration and license agreement with Adaptimmune, or the Adaptimmune Agreement, to develop next-

generation SPEAR™ T cell products which incorporate our secreted and transmembrane immunomodulatory protein (termed SIP™ and TIP™)
technology. We and Adaptimmune will collaborate on a specified number of programs to develop SIP and TIP candidates with tailored affinities and
modulatory activities that may enhance the anti-tumor responses seen with Adaptimmune’s SPEAR™ T cells. For each program, Adaptimmune has an
option to take a worldwide exclusive license for development and commercialization of SPEAR™ T cell products incorporating the developed SIP or TIP
candidate for the treatment of cancer. Under the terms of the collaboration agreement, Adaptimmune provided an upfront payment and will provide
research funding for ongoing programs. In addition, we may be eligible for downstream development and commercialization milestones up to $288.0
million, if all pre-specified milestones for each program are achieved. In addition, we are eligible to receive low-single digit royalties on worldwide net
sales of the applicable products. In February 2022, Adaptimmune selected an additional research program, triggering a $1.0 million upfront payment,
which will be recorded as deferred revenue upon receipt and recognized to revenue based on employee hours contributed.

Manufacturing

We have established in-house non-current good manufacturing practices, recombinant protein generation capabilities enabling our scientific
platform, including validation of new scientific discoveries in vitro and in vivo. Having protein production capabilities in-house allows more rapid
progression for vIgDs and vTDs generated by our scientific platform.

We have chosen U.S.-based contract drug substance and U.S. and Australian drug product manufacturers for our initial current good manufacturing

practices, or cGMP, clinical trial supplies of acazicolcept, davoceticept and ALPN-303. We believe these contract manufacturers’ particular expertise in
protein production, analytical development and fill/finish provide us with the capability to meet rapid timelines encompassing the development of
production cell-lines to manufacturing of clinical trial quantities of the biopharmaceutical product.

We have successfully completed two cGMP manufacturing campaigns for acazicolcept and one cGMP campaign each for davoceticept and ALPN-

303 and believe we have produced sufficient quantities of drug product necessary to execute our stated Synergy, NEON-1, NEON-2, and ALPN-303
Healthy volunteer clinical trials. We have not yet manufactured any of our proteins at commercial scale.

Competition

We participate in the highly competitive sector of biotechnology and pharmaceuticals and in the subsector of immune modulation. This subsector
has undergone tremendous technological advancement over the last decade due to advancements in understanding the role of the immune system across
multiple therapeutic areas, including oncology and autoimmune/inflammatory disease. While we believe our novel technology platform, discovery
programs, knowledge, experience, and scientific resources offer competitive advantages, we face competition from major pharmaceutical and
biotechnology companies, academic institutions, governmental agencies, public and private research institutions, and others.

Any products we successfully develop and commercialize will face competition from currently approved therapies and new therapies potentially

available in the future.

The availability of reimbursement from government and other third-party payors will also significantly affect the pricing and competitiveness of our
products. Our competitors also may obtain FDA or other regulatory approval for their products more rapidly than we may obtain approval for our products,
which could result in our competitors establishing a strong market position before we are able to enter the market.

Many of the companies we compete against may have significantly greater financial resources and expertise in research and development,

manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals, and marketing approved products. 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 patient
registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

Specifically, our competitors include companies developing therapies with the same target(s) as acazicolcept, davoceticept and ALPN-303 as well

as companies building novel platforms to generate immunomodulatory multi-specific antibody or non-antibody-based targeting proteins, particularly in the
area of oncology or autoimmunity.

24

See the risk factor “We face competition from entities that have developed or may develop therapeutic candidates for our target disease indications,

including companies developing novel treatments and technology platforms based on modalities and technology similar to us. If these companies develop
technologies or therapeutic candidates more rapidly than we do, or their technologies, including delivery technologies, are more effective, our ability to
develop and successfully commercialize therapeutic candidates may be adversely affected.” in Part I, Item 1A of this report for more discussion of the
effects of competition and competitors on our business.

Acazicolcept Program Competitors (ICOSL/CD28)

The competitors listed below have programs targeting either ICOS or CD28 (or one of their ligands) for autoimmune and inflammatory diseases. To

our knowledge, there are currently no competitors with a single molecule targeting ICOS and CD28 simultaneously.

•

•

•

•

•

an anti-BAFF, anti-ICOSL bispecific antibody being developed by Amgen, Inc. (rozibafusp alfa (AMG570/MEDI0700));

an anti-CD28 monoclonal antibody fragment being developed by OSE ImmunoTherapeutics SA and Veloxis Pharmaceuticals Inc., a
subsidiary of Asahi Kasei (FR104);

an anti-CD28 peptide being developed by AtoxBio, Inc. (reltecimod (AB-103));

an anti-CD28 monoclonal antibody being development by TheraMAB (TAB08); and

CTLA-4-Fc fusion proteins targeting CD80 and CD86 being marketed Bristol Myers Squibb (abatacept and belatacept).

Davoceticept Program Competitors

There are numerous clinical trials for immuno-oncology products used as a single agent or in combination. One of the potentially novel attributes of

the davoceticept program is that it has exhibited conditional CD28 costimulation and dual checkpoint inhibition in a single molecule interacting with
multiple immune targets.

Examples of additional multi-target compounds for immuno-oncology are highlighted below. To our knowledge, there are currently no competitors

with a single molecule capable of dual PD-L1/CTLA-4 antagonism and PD-L1-dependent CD28 agonism.

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wild-type CD80-Fc being developed by Five Prime Therapeutics, Inc., which was purchased by Amgen Inc. (FPT155);

bispecific antibodies being developed by Regeneron targeting tumor specific antigens and CD28 (REGN5678 anti-PSMAxCD28, REGN5668
anti-MUC16xCD28, and REGN7075 anti-EGFRxCD28);

trispecific antibodies being developed by Sanofi (CD3xCD38xCD28) (SAR442257) and SAR443216 (CD3xCD28xHER2);

bifunctional fusion protein composed of monoclonal antibody against PD-L1 fused to the extracellular domain of human transforming growth
factor-ß, or TGF-ß, receptor II being developed by EMD Serono, Inc. (bintrafusp alfa, or M7824);

bifunctional fusion protein composed of PD-1 and OX40L developed by Shattuck Labs, Inc. (SL-279252);

bispecific fusion protein targeting 4-1BBL and PD-1 being developed by Shattuck Labs, Inc. (SL-279137);

bispecific fusion protein targeting 4-1BB and PD-L1 being developed by Pieris Pharmaceuticals, Inc. and Servier Laboratories (PRS-
344/S095012);

bispecific monoclonal antibody targeting 4-1BB and PD-L1 being developed by Genmab A/S and BioNTech SE (GEN1046);

trispecific monoclonal antibody/fusion targeting 4-1BB and PD-L1 being developed by Numab Therapeutics AG and CStone Pharmaceuticals
Co., Ltd. (NM021/NM21-1480);

bispecific monoclonal antibody targeting 4-1BB and PD-L1 being developed by Merus NV and Incyte Corporation (MCLA-145);

bispecific antibody 4-1BB and PD-L1 being developed by Inhibrx, Inc. and Elpiscience Biopharma Ltd. (INBRX-105);

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bispecific monoclonal antibody targeting 4-1BB and PD-L1 being developed by F-star Biotechnology Ltd. (FS-222);

bispecific fusion protein targeting 4-1BB and PD-L1 being developed by Kahr Medical Ltd., (DSP105);

bispecific monoclonal antibody/fusion protein targeting 4-1BB and PD-L1 being developed by ABL, Inc., and I-Mab Biopharma Co., Ltd.
(ABL503/TJ-L14B);

bispecific monoclonal antibody targeting PD-L1 and LAG-3 being developed by F-star Biotechnology Ltd. (FS118);

bispecific monoclonal antibodies being developed by Xencor, Inc. including XmAb808 targeting CD28 and B7-H3, Vudalimab/XmAb20717
targeting CTLA-4 and PD-1, XmAb841/XmAb22841 targeting CTLA-4 and LAG-3, XmAb104/XmAb23104 targeting PD-1 and ICOS, and
additional preclinical CD28 bispecific antibody programs;

bispecific constructs called “DARTs” being developed by Macrogenics Inc., including Tebotelimab (MGD013) targeting PD-1 and LAG-3
and Lorigerlimab MGD019) targeting PD-1 and CTLA-4;

DARPin® therapeutic candidate targeting 4-1BB and FAP being developed by Molecular Partners AG and Amgen, Inc (MP0310/AMG 506);

bispecific monoclonal antibody targeting 4-1BB and FAP being developed by Tesaro, Inc., which was purchased by GlaxoSmithKline plc,
targeting PD-1 and LAG-3;F. Hoffmann-La Roche AG (RO7122290);

bispecific monoclonal antibody targeting 4-1BB and HER-2 being developed by Pieris Pharmaceuticals, Inc. (cinrebafusp alfa or PRS-343);

small molecule antagonists being developed by Aurigene Ltd. and Curis, Inc., including CA-170 targeting PD-L1 and VISTA and CA-327
targeting PD-L1 and TIM-3;

various combinations of separate anti PD-1/L1 and anti-CTLA-4 monoclonal antibodies; and

various combinations of separate anti PD-1/L1 and costimulatory monoclonal antibodies such as OX-40, 4-1BB, and others.

ALPN-303 Program Competitors

The competitors listed below have programs targeting either the TACI, BCMA, or BAFF pathway for autoimmune disease.

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Anti-BAFF antibody marketed by GSK plc (belimumab);

TACI-Fc being developed by Vera Therapeutics (atacicept);

TACI-Fc being developed by RemeGen Ltd. (telitacicept (RC18));

Anti-BAFF-R IgG1 being developed by Novartis AG (Ianalumab (VAY736));

Anti-APRIL antibody being developed by Visterra, Inc., a subsidiary of Otsuka Pharmaceutical Co., Ltd. (sibeprenlimab (VIS649));

Anti-BAFF, anti-ICOSL bispecific antibody being developed by Amgen, Inc. (rozibafusp alfa (AMG570/MEDI0700));

Anti-APRIL antibody being developed by Chinook Therapeutics, Inc. (BION-1301); and

a recombinant Fc fusion protein designed to block BAFF and APRIL cytokines being developed by Aurinia Pharmaceuticals Inc. (AUR200).

Novel Platform Competitors

Multifunctional therapeutic protein platforms potentially competitive with our platform include:

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Amgen Inc. (BiTE®): fusion proteins consisting of two single-chain variable fragments to link T cells to tumors;

Macrogenics, Inc. (DART®): Dual-Affinity Re-Targeting and Trident technology platforms bind multiple targets with a single molecule;

Xencor, Inc. (XmAb Bispecific): Optimized Fc domains for improved potency, half-life and stability;

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Zymeworks, Inc. (Azymetric™): Proprietary amino acid modifications to facilitate interaction of distinct heavy chains;

Pieris Pharmaceuticals, Inc. (Anticalin®): Engineered proteins derived from natural lipocalins found in blood plasma;

Compass Therapeutics, LLC (Targeted Immunomodulation™, StitchMabs™): Antibody discovery targeting the tumor-immune synapse;

Harpoon Therapeutics, Inc.: TriTAC™ (Tri-specific T cell Activating Construct) contain CD3 binding domain, half-life extension domain,
and antigen-binding domain;

Shattuck Labs, Inc.: Agonist Redirected Antibody platform claimed to bind tumor-necrosis factor (“TNF”) and checkpoint targets;

Ablynx NV (Nanobody®), purchased by Sanofi Pharma, Inc.: Platform technology of single-domain, heavy-chain antibody fragments derived
from camelidae (e.g., camels and llamas);

Regeneron, Inc.: VEGF Trap and VelociSuite® antibody technology platforms;

Five Prime Therapeutics, Inc., purchased by Amgen Inc.: Proprietary protein library and rapid protein production and testing platform; and

Merus N.V. (Merus Multiclonics® including Biclonics® and Triclonics®): Discovery, screening, and identification platform for bispecific
and trispecific antibodies.

Intellectual Property

Our scientific platform and substantially all our intellectual property have been developed internally. As of December 31, 2021, our patent portfolio

consists of 47 granted patents and over 155 pending patent applications. Several of our initial patent applications are directed to our scientific platform
itself. Other patent applications in our portfolio are directed to various target domains and research programs under development. Each of these patent
applications is solely owned by us. As we continue the development of our scientific platform and target vIgDs, we intend to continue pursuing intellectual
property protection for these technologies.

We have in-licensed some intellectual property and trade secret materials on a non-exclusive basis. To date, such non-exclusive in-licenses are

solely related to commercially-available cell lines involved in the manufacture of our vIgD programs. To date, no other intellectual property related to our
scientific platform has been in-licensed. We have out-licensed two programs under our TIP/SIP technology to Adaptimmune on an exclusive basis.
Additionally, pursuant to the AbbVie Agreement, we have granted AbbVie an exclusive option to purchase an exclusive worldwide license to acazicolcept.
If AbbVie exercises the License Option, AbbVie will take over the future development and commercialization. Finally, pursuant to the Horizon Agreement,
we have granted Horizon an exclusive license of certain intellectual property and have entered into a collaboration for the development and
commercialization of up to four preclinical candidates generated from Alpine’s unique discovery platform. These candidates include previously undisclosed
multi-specific fusion protein-based therapeutic candidates for autoimmune and inflammatory diseases. No other out-licenses have been made.

Although we do not believe our technology infringes any intellectual property rights owned by third parties, we are aware of one or more patents

and patent applications that may relate to our technology. Third parties may assert claims against us alleging infringement of their intellectual property
rights regardless of whether their allegations have merit. Allegations of infringement could harm our reputation, may result in the expenditure of significant
resources to defend and resolve such allegations, and could require us to pay monetary damages if we are found to have infringed any third-party
intellectual property rights.

Government Regulation

The FDA and comparable regulatory authorities in state and local jurisdictions and in other countries impose substantial and burdensome
requirements on the clinical development, manufacture, marketing, and distribution of therapeutic candidates. These agencies and other federal, state, and
local entities regulate research and development activities and the testing, manufacture, quality control, safety, effectiveness, labeling, storage, record
keeping, approval, advertising and promotion, and export and import of therapeutic candidates and products.

In the U.S., the FDA regulates drugs, medical devices, and biologic products under the Federal Food, Drug, and Cosmetic Act, or FFDCA, its

implementing regulations and other laws, including, in the case of biologics, the Public Health

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Service Act. Our potential therapeutic candidates and products will be subject to regulation by the FDA as biologics. Biologics require the submission of a
Biologics License Application, or BLA, and approval by the FDA before being marketed in the U.S. None of our therapeutic candidates have been
approved by the FDA for marketing in the U.S., and we currently have no BLAs pending. If we fail to comply with applicable FDA or other requirements
at any time during the product development process, clinical testing, the approval process, or after approval, we may become subject to administrative or
judicial sanctions. These sanctions could include the FDA’s refusal to approve pending applications, license suspension or revocation, withdrawal of an
approval, warning letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, civil penalties, or
criminal prosecution. Any FDA enforcement action could have a material adverse effect on us. The process required by the FDA before biologic
therapeutic candidates may be marketed in the U.S. generally involves the following:

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completion of extensive preclinical laboratory tests, preclinical animal studies, and formulation studies all performed in accordance with the
FDA’s current good laboratory practice, or cGLP, regulations;

submission to the FDA of an Investigational New Drug, or IND, application which must become effective before human clinical trials in the
U.S. may begin;

performance of adequate and well-controlled human clinical trials to establish the safety and efficacy of the drug candidate for each proposed
indication;

submission to the FDA of a BLA;

satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the product is produced to assess compliance
with cGMP regulations; and

FDA review and approval of the BLA prior to any commercial marketing, sale, or shipment of the therapeutic product.

The testing and approval process requires substantial time, effort, and financial resources, and we cannot be certain any approvals for our

therapeutic candidates will be granted on a timely basis, if at all.

Once a therapeutic candidate is identified for development, it enters the preclinical testing stage. Preclinical studies include laboratory evaluations

of protein chemistry, formulation, and stability, as well as studies to evaluate toxicity in animals. The results of the preclinical studies, together with
manufacturing information and analytical data, are submitted to the FDA as part of an IND application. Currently, the IND automatically becomes effective
30 days after receipt by the FDA, unless the FDA, within the 30-day period, raises concerns or questions about the conduct of the clinical trial, including
concerns that human research subjects will be exposed to unreasonable health risks. In such a case, the IND sponsor and the FDA must resolve any
outstanding concerns before the clinical trial can begin. Submission of an IND may result in the FDA not allowing the clinical trials to commence or not
allowing the clinical trials to commence on the terms originally specified in the IND. A separate submission to an existing IND must also be made for each
successive clinical trial conducted during drug development, and the FDA must grant permission, either explicitly or implicitly by not objecting, before
each clinical trial can begin.

Clinical trials involve the administration of the therapeutic candidate to human subjects under the supervision of qualified investigators. Clinical

trials are conducted under protocols detailing, among other things, the objectives of the clinical trial, the parameters to be used in monitoring safety, and the
effectiveness criteria to be used. Each protocol must be submitted to the FDA as part of the IND. For each medical center proposing to conduct a clinical
trial, an institutional review board, or IRB, must also review and approve a plan for any clinical trial before it can begin at that center and the IRB must
monitor the clinical trial until it is completed. The FDA, an IRB, or the sponsor may suspend or discontinue a clinical trial at any time on various grounds,
including a finding that the subjects are being exposed to an unacceptable health risk. Clinical testing also must satisfy extensive Good Clinical Practice
requirements, including the requirements for informed consent.

All clinical research performed in the U.S. in support of a BLA must be authorized in advance by the FDA under the IND regulations and

procedures described above. However, a sponsor who wishes to conduct a clinical trial outside the U.S. may, but need not, obtain FDA authorization to
conduct the clinical trial under an IND. If a foreign clinical trial is not conducted under an IND, the sponsor may submit data from the clinical trial to the
FDA in support of a BLA so long as the clinical trial is conducted in compliance with an international guideline for the ethical conduct of clinical research
known as the Declaration of Helsinki and/or the laws and regulations of the country or countries in which the clinical trial is performed, whichever
provides the greater protection to the participants in the clinical trial.

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Clinical Trials

For purposes of BLA submission and approval, clinical trials are typically conducted in three sequential phases, which may overlap or be combined.

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Phase 1 clinical trials are initially conducted in a limited population of subjects to test the therapeutic candidate for safety, dose tolerance,
absorption, metabolism, distribution, and excretion in healthy humans or, on occasion, in patients with severe problems or life-threatening
diseases to gain an early indication of its effectiveness.

Phase 2 clinical trials are generally conducted in a limited patient population to evaluate preliminary efficacy of the therapeutic candidate for
specific targeted indications in patients with the disease or condition under study, evaluate dosage tolerance and appropriate dosage, determine
a dosage schedule, and identify possible adverse effects and safety risks.

Phase 3 clinical trials are commonly definitive efficacy studies of the experimental medication. Phase 3 trials are typically conducted when
Phase 2 clinical trials demonstrate a dose range of the therapeutic candidate is effective and has an acceptable safety profile. Phase 3 clinical
trials are generally undertaken with large numbers of patients, such as groups of several hundred to several thousand, to provide substantial
evidence of clinical efficacy and to further test for safety in an expanded patient population at multiple, geographically-dispersed clinical trial
sites.

In some cases, the FDA may condition approval of a BLA on the sponsor’s agreement to conduct additional post-approval clinical trials to further

assess the biologic’s safety and effectiveness after BLA approval. Such post-approval clinical trials are typically referred to as Phase 4 clinical trials.

Concurrent with clinical trials, companies usually complete additional animal trials and must also develop additional information about the
chemistry and physical characteristics of the biologic and finalize a process for manufacturing the biologic in commercial quantities in accordance with
cGMP requirements. The manufacturing process must be capable of consistently producing quality batches of the therapeutic candidate and, among other
things, the manufacturer must develop methods for testing the identity, strength, quality, and purity of the final biologic product. Additionally, appropriate
packaging must be selected and tested, and stability studies must be conducted to demonstrate the therapeutic candidate does not undergo unacceptable
deterioration over its shelf life.

Further, as a result of the COVID-19 pandemic, we may be required to develop and implement additional clinical trial policies and procedures

designed to help protect subjects from the COVID-19 virus. For example, the FDA has issued guidance on conducting clinical trials during the pandemic,
which describes a number of considerations for sponsors of clinical trials impacted by the pandemic, including certain reporting requirements, and
additional guidance on the good manufacturing practice considerations for responding to COVID-19 infection and other topics. We may be required to
make further adjustments to our clinical trials or business operations based on current or future guidance and regulatory requirements as a result of the
COVID-19 pandemic.

Biologics License Applications

The results of preclinical studies and of the clinical trials, together with other detailed information, including extensive manufacturing information
and information on the chemistry, pharmacology, clinical pharmacology, and the clinical effects of the biologic, are submitted to the FDA in the form of a
BLA requesting approval to market the biologic for one or more specified indications. The FDA reviews a BLA to determine, among other things, whether
a biologic is safe, pure, and potent and whether the facility in which the biological product is manufactured, processed, packed, or held meets standards
designed to assure the biological product continues to be safe, pure, and potent.

Once a BLA has been accepted for filing, by law the FDA will review the application and respond to the applicant, but the review process may be

significantly delayed by FDA’s requests for additional information or clarification. Under the Prescription Drug User Fee Act, the FDA evaluates a standard
original BLA submission within the first 60 days of its receipt to determine if it is sufficiently complete to conduct a full review, and the FDA has a goal of
responding to the submission within ten months of the 60-day filing date, but this timeframe is often extended. The FDA may refer the application to an
advisory committee for review, evaluation, and/or recommendation as to whether the application should be approved. The FDA is not bound by the
recommendation of an advisory committee, but it generally follows such recommendations. The FDA may deny approval of a BLA if the applicable
statutory and regulatory criteria are not satisfied, or for any reason, or it may require additional clinical data. Even if such data are submitted, the FDA may
ultimately decide the BLA does not satisfy the criteria for approval. Data from clinical trials are not always conclusive and the FDA may interpret data
differently than we interpret data. Once the FDA approves a BLA, or supplement thereto, the FDA may withdraw the approval if ongoing regulatory
requirements are not met or if safety problems are identified after the biologic reaches the market. Where a withdrawal may not

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be appropriate, the FDA still may seize existing inventory of such biologic or require a recall of any biologic already on the market. In addition, the FDA
may require testing, including Phase 4 clinical trials and surveillance programs to monitor the effect of approved biologics which have been
commercialized. The FDA has the authority to prevent or limit further marketing of a biologic based on the results of these post-marketing programs.

A sponsor may also seek approval of its therapeutic candidates under programs designed to accelerate FDA review and approval of BLAs. For

instance, a sponsor may seek FDA designation of a therapeutic candidate as a “fast track product.” Fast track products are those products intended for the
treatment of a serious or life-threatening disease or condition and which demonstrate the potential to address unmet medical needs for such diseases or
conditions. If fast track designation is obtained, the FDA may initiate review of sections of a BLA before the application is complete. This “rolling review”
is available if the applicant provides, and the FDA approves, a schedule for the remaining information. In some cases, a fast track product may be approved
on the basis of either 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, under the FDA’s accelerated approval
program. Approvals of this kind typically include requirements for appropriate post-approval confirmatory clinical trials to validate the surrogate endpoint
or otherwise confirm the effect of the clinical endpoint.

In addition, the Food and Drug Administration Safety and Innovation Act, or FDASIA, which was enacted and signed into law in 2012, established

a new category of drugs referred to as “breakthrough therapies” that may be subject to accelerated approval. A sponsor may seek FDA designation of a
drug candidate as a “breakthrough therapy” if the drug is intended, alone or in combination with one or more other drugs, to treat a serious or life-
threatening disease or condition and preliminary clinical evidence indicates the drug may demonstrate substantial improvement over existing therapies on
one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development.

Therapeutic candidates may also be eligible for “priority review,” or review within a six-month timeframe from the 60-day filing date, if a sponsor

provides sufficient clinical data demonstrating its therapeutic candidate provides a significant improvement compared to marketed products. Even if a
therapeutic candidate qualifies for one or more of these programs, the FDA may later decide the therapeutic candidate no longer meets the conditions for
qualification or that the period for FDA review or approval will be lengthened. When appropriate, we intend to seek fast track designation and/or
accelerated approval for our biologics. We cannot predict whether any of our therapeutic candidates will obtain a fast track and/or accelerated approval
designation and, if so, whether such designation will be maintained or rescinded by FDA, or the ultimate impact, if any, of the fast track or the accelerated
approval process on the timing or likelihood of FDA approval of any of our proposed biologics.

Biologics may be marketed only for the FDA approved indications and in accordance with the provisions of the approved labeling. Further, if there
are any modifications to the biologic, including changes in indications, labeling, or manufacturing processes, equipment, or facilities, the applicant may be
required to submit and obtain FDA approval of a new BLA or BLA supplement, which may require us to develop additional data or conduct additional
preclinical studies and clinical trials.

Before approving an application, the FDA will inspect the facility or the facilities at which the biologic product is manufactured and will not
approve the product unless cGMP compliance is satisfactory. The FDA may also inspect the sites at which the clinical trials were conducted to assess their
compliance and will not approve the biologic unless compliance with Good Clinical Practice requirements is satisfactory.

The testing and approval processes require substantial time, effort, and financial resources, and each may take several years to complete. The FDA

may not grant approval on a timely basis, or at all. Even if we believe a clinical trial has demonstrated safety and efficacy of one of our therapeutic
candidates for the treatment of a disease, the results may not be satisfactory to the FDA. Preclinical and clinical data may be interpreted by the FDA in
different ways, which could delay, limit, or prevent regulatory approval. We may encounter difficulties or unanticipated costs in our efforts to secure
necessary governmental approvals which could delay or preclude us from marketing our therapeutic candidates. The FDA may limit the indications for use
or place other conditions on any approvals restricting the commercial application of the products. After approval, certain changes to the approved biologic,
such as adding new indications, change in personnel, manufacturing changes, or additional labeling claims, are subject to further FDA review and approval.
Depending on the nature of the change proposed, a BLA supplement which may require additional studies to evaluate the effect of such change on the
identity, strength, quality, purity, or potency of the product as they may relate to the safety or effectiveness of the product—must be filed and approved
before the change may be implemented. As with new BLAs, the review process for BLA supplements may be delayed by the FDA through requests for
additional information or clarification.

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We believe any of our therapeutic products approved as a biological product under a BLA might qualify for a 12-year period of exclusivity currently
permitted by the Biologics Price Competition and Innovation Act, or BPCIA. Specifically, the BPCIA established an abbreviated pathway for the approval
of biosimilar and interchangeable biological products. The new abbreviated regulatory pathway establishes legal authority for the FDA to review and
approve biosimilar biologics, including the possible designation of a biosimilar as “interchangeable” based on its similarity to an existing brand product.
Under the BPCIA, an application for a biosimilar product cannot be submitted by an applicant until four years after the date the reference product was first
licensed and cannot be approved by the FDA until 12 years after the original branded product was first licensed under a BLA. There is a risk the U.S.
Congress could amend the BPCIA to significantly shorten this exclusivity period or the FDA will not consider our therapeutic candidates to be reference
products for competing products, potentially creating the opportunity for competition sooner than anticipated. Moreover, the extent to which a biosimilar,
once approved, will be substituted for any one of our reference products in a way 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. The BPCIA is complex and is only beginning to
be interpreted and implemented by the FDA and the courts. As a result, its ultimate impact, implementation, and meaning are subject to uncertainty. While
it is uncertain when any such processes may be fully adopted by the FDA, any such processes operating to limit the scope or length of exclusivity afforded
by the BPCIA could have a material adverse effect on the future commercial prospects for our biological products. In addition, foreign regulatory
authorities may also provide for exclusivity periods for approved biological products or for abbreviated pathways for follow on biological products. For
example, biological products in Europe may be eligible for a 10-year period of exclusivity.

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

which is generally a disease or condition affecting fewer than 200,000 individuals in the U.S. or more than 200,000 individuals in the U.S. and for which
there is no reasonable expectation the cost of developing and making available in the U.S. a therapeutic candidate for this type of disease or condition will
be recovered from sales in the U.S. for that therapeutic candidate. Orphan drug designation must be requested before submitting a marketing application for
the therapeutic for that particular rare disease or condition. After the FDA grants orphan drug designation, the identity of the therapeutic agent and its
potential orphan use are disclosed publicly by the FDA. Orphan drug designation does not convey any advantage in, or shorten the duration of, the
regulatory review and approval process. The FDA may revoke orphan drug designation, and if it does, it will publicize the drug is no longer designated as
an orphan drug. If a therapeutic candidate with orphan drug designation subsequently receives the first FDA approval for the disease for which it has such
designation, the therapeutic candidate is entitled to orphan product exclusivity, which means the FDA may not approve any other applications to market the
same therapeutic candidate for the same indication, except in very limited circumstances, for seven years. Orphan drug exclusivity, however, could also
block the approval of one of our therapeutic candidates for seven years if a competitor obtains approval of the same therapeutic candidate as defined by the
FDA or if our therapeutic candidate is determined to be contained within the competitor’s therapeutic candidate for the same indication or disease.

Under the Best Pharmaceuticals for Children Act, certain therapeutic candidates may obtain an additional six months of exclusivity if the sponsor

submits information requested in writing by the FDA, referred to as a “Written Request,” relating to the use of the active moiety of the therapeutic
candidate in children. The FDA may not issue a Written Request for studies on unapproved or approved indications where it determines information
relating to the use of a therapeutic candidate in a pediatric population, or part of the pediatric population, may not produce health benefits in that
population. In addition, the Pediatric Research Equity Act, or PREA, requires a sponsor to conduct pediatric studies for most therapeutic candidates and
biologics, for a new active ingredient, new indication, new dosage form, new dosing regimen, or new route of administration. Under PREA, original or
New Drug Applications, or NDAs, BLAs and supplements thereto must contain a pediatric assessment unless the sponsor has received a deferral or waiver.
The required assessment must assess the safety and effectiveness of the therapeutic candidate for the claimed indications in all relevant pediatric
subpopulations and support dosing and administration for each pediatric subpopulation for which the therapeutic candidate is safe and effective. The
sponsor or the FDA may request a deferral of pediatric studies for some or all of the pediatric subpopulations. A deferral may be granted for several
reasons, including a finding that the drug or biologic is ready for approval for use in adults before pediatric studies are complete or additional safety or
effectiveness data needs to be collected before the pediatric studies begin. The FDA must send a noncompliance letter to any sponsor that fails to submit
the required assessment, keep a deferral current, or fails to submit a request for approval of a pediatric formulation.

Other Regulatory Requirements

Any biologics manufactured or distributed by us or our collaborators pursuant to FDA approvals would be subject to continuing regulation by the
FDA, including recordkeeping requirements and reporting of adverse experiences associated with the product. 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 ongoing regulatory requirements, including cGMPs, which impose certain procedural and documentation
requirements upon us and third-party manufacturers. Failure to comply with the statutory and regulatory requirements can subject a manufacturer to

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possible legal or regulatory action, such as warning letters, suspension of manufacturing, seizure of product, injunctive action or possible civil penalties.
Our company cannot be certain it or its present or future third-party manufacturers or suppliers will be able to comply with the cGMP regulations and other
ongoing FDA regulatory requirements. If our company or its present or future third-party manufacturers or suppliers are not able to comply with these
requirements, the FDA may halt our clinical trials, require us to recall a drug from distribution, or withdraw approval of the BLA for the therapeutic
product.

The FDA closely regulates the post-approval marketing and promotion of biologics, including standards and regulations for direct-to-consumer

advertising, off-label promotion, industry-sponsored scientific and educational activities, and promotional activities involving the Internet. A company can
make only those claims relating to safety and efficacy approved by the FDA. Failure to comply with these requirements can result in adverse publicity,
warning letters, corrective advertising, and potential civil and criminal penalties. Physicians may prescribe legally available biologics for uses not described
in the product’s labeling and different from those tested by us and approved by the FDA. Such off-label uses are common across medical specialties.
Physicians may believe 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, impose stringent restrictions on manufacturers’ communications regarding off-label use.

Healthcare Reform

In 2010, Congress passed the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, which

we refer to as the ACA, a sweeping law intended to broaden access to health insurance, reduce or constrain the growth of health spending, enhance
remedies against fraud and abuse, add new transparency requirements for the healthcare and health insurance industries, impose new taxes and fees on the
health industry, and impose additional policy reforms. The ACA contains a number of provisions, including those governing enrollment in federal
healthcare programs, reimbursement changes, and fraud and abuse, impacting existing government healthcare programs and resulting in the development of
new programs, including Medicare payment for performance initiatives, and improvements to the physician quality reporting system and feedback
program. The Affordable Care Act also does, among other things, the following:

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Increases pharmaceutical manufacturer rebate liability under the Medicaid Drug Rebate Program due to an increase in the minimum basic
Medicaid rebate on most branded prescription drugs, and the application of Medicaid rebate liability to drugs used in risk-based Medicaid
managed care plans.

Expands the 340B Drug Pricing Program to require discounts for “covered outpatient drugs” sold to certain children’s hospitals, critical
access hospitals, freestanding cancer hospitals, rural referral centers, and sole community hospital.

Requires pharmaceutical companies to offer discounts on brand-name drugs to patients who fall within the Medicare Part D coverage gap,
commonly referred to as the “Donut Hole.”

Requires pharmaceutical companies to pay an annual non-tax-deductible fee to the federal government based on each company’s market share
of prior year total sales of branded drugs to certain federal healthcare programs, such as Medicare, Medicaid, Department of Veterans Affairs,
and Department of Defense.

Establishes the Patient-Centered Outcomes Research Institute to identify priorities in, and conduct comparative clinical effectiveness research,
along with funding for such research. The research conducted by the Patient-Centered Outcomes Research Institute may affect the market for
certain pharmaceutical products.

Establishes the Center for Medicare and Medicaid Innovation within the Centers for Medicare and Medicaid Services, or CMS to test
innovative payment and service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug spending.

From time to time, legislation is drafted, introduced, and passed in Congress that could significantly change the statutory provisions governing the

sale, marketing, coverage, and reimbursement of products regulated by the CMS or other government agencies. In addition to new legislation, CMS
regulations and policies are often revised or interpreted by the agency in ways significantly affecting our business and our products.

Since its enactment, there have been judicial and Congressional challenges to certain aspects of the ACA, and we expect there will be additional
challenges and amendments to the ACA in the future. For example, in June 2021, the United States Supreme Court held that Texas and other challengers
had no legal standing to challenge the ACA, dismissing the case without specifically ruling on the constitutionality of the ACA. Accordingly, the ACA
remains in effect in its current form. It is unclear how this Supreme Court decision, future litigation, or healthcare measures promulgated by the Biden
administration will impact our business, financial condition and results of operations. Complying with any new legislation or changes in healthcare
regulation could be time-intensive and expensive, resulting in material adverse effect on our business.

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Additionally, at the federal level, in 2020, the HHS and CMS issued various rules that are expected to impact, among others, price reductions from

pharmaceutical manufacturers to plan sponsors under Part D, fee arrangements between pharmacy benefit managers and manufacturers, importation of
prescription drugs from Canada and other countries, manufacturer price reporting requirements under the Medicaid Drug Rebate Program, including
regulations that affect manufacturer-sponsored patient assistance programs subject to pharmacy benefit manager accumulator programs and Best Price
reporting related to certain value-based purchasing arrangements. Multiple lawsuits have been brought against the HHS challenging various aspects of the
rules implemented during the Trump administration. As a result, the Biden administration and HHS have delayed the implementation or published rules
rescinding some of these Trump-era policies. In January 2021, President Biden also issued an executive order to initiate a special enrollment period for
people to obtain health insurance coverage through the ACA marketplace, and instructs certain governmental agencies to review and reconsider their
existing policies and rules that limit access to healthcare, among others. Under the American Rescue Plan Act of 2021, effective January 1, 2024, the
statutory cap on Medicaid Drug Rebate Program rebates that manufacturers pay to state Medicaid programs will be eliminated. Elimination of this cap may
require pharmaceutical manufacturers to pay more in rebates than it receives on the sale of products, which could have a material impact on our business.
Additionally, in July 2021, the Biden administration released an executive order, “Promoting Competition in the American Economy,” with multiple
provisions aimed at prescription drugs. In response to Biden’s executive order, on September 9, 2021, HHS released a Comprehensive Plan for Addressing
High Drug Prices that outlines principles for drug pricing reform and sets out a variety of potential legislative policies that Congress could pursue as well as
potential administrative actions HHS can take to advance these principles. Although no legislation or administrative actions have been finalized to
implement these principles, Congress is considering legislation that, if passed, could have significant impact on prices of prescription drugs covered by
Medicare, including limitations on drug price increases and allowing Medicare to negotiate pricing for certain drugs. The implementation of cost
containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability, or commercialize our product
candidates if approved. Complying with any new legislation and regulatory changes could be time-intensive and expensive, resulting in a material adverse
effect on our business.

Further, many states have proposed or enacted legislation that seeks to indirectly or directly regulate pharmaceutical drug pricing, such as by
requiring biopharmaceutical manufacturers to publicly report proprietary pricing information or to place a maximum price ceiling on pharmaceutical
products purchased by state agencies. For example, a number of states are considering or have recently enacted state drug price transparency and reporting
laws that could substantially increase our compliance burdens and expose us to greater liability under such state laws once we begin commercialization
after obtaining regulatory approval for any of our products candidates. We cannot be sure to what extent these and future legislative and regulatory efforts,
whether FDA regulations, guidance or interpretations will be changed, or what the impact of such changes on the marketing approvals of our product
candidates, if any, may be. In addition, increased scrutiny by Congress of the FDA’s approval process may significantly delay or prevent marketing
approval, as well as subject us to more stringent product labeling and post-marketing testing and other requirements. These measures could reduce the
ultimate demand for our products, once approved, or put pressure on our product pricing. We expect that additional state and federal healthcare reform
measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and
services, which could affect the prices we may obtain for any of our product candidates for which we may obtain regulatory approval or the frequency with
which any such product candidate, if approved, is prescribed or used.

Furthermore, political, economic, and regulatory influences are subjecting the health care industry in the U.S. to fundamental change. Initiatives to

reduce the federal budget and debt and to reform health care coverage are increasing cost-containment efforts. We anticipate federal agencies, Congress,
state legislatures, and the private sector will continue to review and assess alternative health care benefits, controls on health care spending, and other
fundamental changes to the healthcare delivery system. Any proposed or actual changes could limit coverage for, or the amounts federal and state
governments will pay for, health care products and services, which could also result in reduced demand for our products or additional pricing pressures, and
limit or eliminate our spending on development projects and affect our ultimate profitability.

Third-Party Payor Coverage and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any products for which we may obtain regulatory approval. In the U.S.,

sales of any products for which we may receive regulatory approval for commercial sale will depend in part on the availability of coverage and
reimbursement from third-party payors. Third-party payors include government authorities such as Medicare, Medicaid, TRICARE, and the Veterans
Administration, managed care providers, private health insurers and other organizations.

The Medicaid Drug Rebate Program, which is part of the federal Medicaid program, a program for financially needy patients, among others,

requires pharmaceutical manufacturers to enter into and have in effect a national rebate agreement with the Secretary of the Department of Health and
Human Services as a condition for states to receive federal matching funds for the manufacturer’s outpatient drugs furnished to Medicaid patients.

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In order for a pharmaceutical product to receive federal reimbursement under Medicare Part B, part of the federal Medicare program covering
outpatient items and services for the aged and disabled, and Medicaid programs or to be sold directly to U.S. government agencies, the manufacturer must
extend discounts to entities eligible to participate in the 340B drug pricing program, a federal program requiring manufacturers to provide discounts to
certain safety-net providers. The required 340B discount on a given product is calculated based upon certain Medicaid Drug Rebate Program metrics
reported by the manufacturer.

The process for determining whether a payor will provide coverage for a product is typically separate from the process for setting the

reimbursement rate a payor will pay for the product. Third-party payors may limit coverage to specific products on an approved list or formulary which
might not include all of the FDA-approved products for a particular indication. Also, third-party payors may refuse to include a particular branded product
on their formularies or otherwise restrict patient access to a branded drug when a less costly generic equivalent or other alternative is available. However,
under Medicare Part D - Medicare’s outpatient prescription drug benefit - there are protections in place to ensure coverage and reimbursement for oncology
products and all Part D prescription drug plans are required to cover substantially all anti-cancer agents. Furthermore, a payor’s decision to provide
coverage for a product does not imply an adequate reimbursement rate will be available. Adequate third-party reimbursement may not be available to
enable us to maintain price levels sufficient to realize an appropriate return on our investment in product development.

Third-party payors are increasingly challenging the price and examining the medical necessity and cost-effectiveness of medical products and

services, in addition to their safety and efficacy. In order to obtain coverage and reimbursement for any product approved for sale, we may need to pursue
compendia listings or conduct expensive pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effectiveness of any products,
in addition to the costs required to obtain regulatory approvals. Our drug candidates may not be considered medically necessary or cost-effective. If third-
party payors do not consider a product to be cost-effective compared to other available therapies, they may not cover an approved product as a benefit
under their plans or, if they do, the level of payment may not be sufficient to allow a company to sell its products at a profit.

Other Healthcare Laws and Regulations

In the United States, the research, manufacturing, distribution, sale and promotion of drug products are subject to regulation by various federal, state
and local authorities in addition to the FDA, including the Centers for Medicare & Medicaid Services, other divisions of the U.S. Department of Health and
Human Services (e.g., the Office of Inspector General), the U.S. Department of Justice, state attorneys general, and other state and local government
agencies.

If we obtain regulatory approval of our products, we may be subject to various federal and state laws targeting fraud and abuse in the healthcare

industry. These laws may impact, among other things, our proposed sales and marketing strategies. In addition, we may be subject to patient privacy
regulation by both the federal government and the states in which we conduct our business. The laws affecting our ability to operate include, but are not
limited to:

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the federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, receiving, offering,
or paying remuneration (a term interpreted broadly to include anything of value, including, for example, gifts, discounts, and credits), directly
or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, order, or
recommendation of, an item or service reimbursable under a federal health care program, such as the Medicare and Medicaid programs;

federal civil and criminal false claims laws and civil monetary penalty laws, which prohibit, among other things, individuals or entities from
knowingly presenting, or causing to be presented, claims for payment to Medicare, Medicaid, or other third-party payors that are false or
fraudulent, or making a false statement or record material to payment of a false claim or avoiding, decreasing, or concealing an obligation to
pay money owed to the federal government;

provisions of HIPAA, prohibiting knowingly and willfully executing a scheme to defraud any health care benefit program and making false
statements relating to health care matters;

provisions of HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act and its implementing
regulations, which imposes certain requirements relating to the privacy, security, and transmission of individually identifiable health
information;

the federal transparency laws, including the federal Physician Payment Sunshine Act, which was part of the Affordable Care Act, requiring
applicable manufacturers of certain drugs and biologics, among other covered medical products for which payment is available under
Medicare, Medicaid or the Children’s Health Insurance Program, with certain exceptions, to track and report annually certain payments and
other transfers of value they

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make to covered recipients, including U.S. physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors, other
health care professionals (such as nurse practitioners and physician assistants, among others) and teaching hospitals, as defined by law, as well
as physicians’ and physicians’ immediate family members’ ownership and investment interests in the applicable manufacturer, which are
subsequently made publicly available in a searchable format on the CMS Open Payments website; and

•

state law equivalents of each of the above federal laws, such as anti-kickback and false claims laws which may apply to items or services
reimbursed by any third-party payor, including commercial insurers, state transparency reporting and compliance laws, and state and foreign
laws governing the privacy and security of health information in certain circumstances, many of which differ from each other in significant
ways and may not have the same effect, thus complicating compliance efforts.

The ACA broadened the reach of the fraud and abuse laws by, among other things, amending the intent requirement of the federal Anti-Kickback

Statute and the applicable criminal healthcare fraud statutes contained within 42 U.S.C. § 1320a-7b. Pursuant to the statutory amendment, a person or entity
no longer needs to have actual knowledge of this statute or specific intent to violate it in order to have committed a violation. In addition, the ACA provides
the government may assert 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 civil False Claims Act or the civil monetary penalties statute. Many states have adopted laws similar to the federal
Anti-Kickback Statute, some of which apply to the referral of patients for healthcare items or services reimbursed by any source, not only the Medicare and
Medicaid programs.

If our operations are found to be in violation of any of the U.S. federal and state laws described above or any other governmental regulations that

apply to us, we may be subject to penalties, including criminal and significant civil monetary penalties, damages, fines, disgorgement, imprisonment,
exclusion from participation in government healthcare programs, injunctions, recall or seizure of products, total or partial suspension of production, denial
or withdrawal of pre-marketing product approvals, private qui tam actions brought by individual whistleblowers in the name of the government or refusal
to allow us to enter into supply contracts, including government contracts, and the curtailment or restructuring of our operations, any of which could
adversely affect our ability to operate our business and our results of operations. We may also be subject to additional reporting requirements and oversight
if we become subject to a corporate integrity agreement or similar agreement with a governmental entity to resolve allegations that we have violated these
laws. To the extent that any of our product candidates, once approved, are sold in a foreign country, we may be subject to similar foreign laws and
regulations, which may include, for instance, applicable post-approval requirements, including safety surveillance, anti-fraud and abuse laws, and
implementation of corporate compliance programs and reporting of payments or transfers of value to healthcare professionals.

Human Capital

Our employees share a passion for meaningful work and are committed to solving the most complex problems in creating immunotherapies to treat

cancer and autoimmune and inflammatory diseases. Our culture is guided by our core values of innovative thinking, collaboration, flexibility, bias for
action, and healthy debate. As of December 31, 2021, we had 85 employees, of which 67 are engaged in research and development activities and 18 in
general and administrative. 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.

We believe that we provide competitive compensation and benefits for our personnel and that our compensation and benefit packages are designed

to attract and retain highly qualified personnel essential to our business. In addition to salary compensation, our compensation includes new equity grants, a
401(k) retirement plan, healthcare and insurance benefits and a flexible paid time off policy.

We are committed to diversity, equity and inclusion. We recruit the best qualified employees regardless of gender, ethnicity or other protected traits

and it is our policy to comply with all applicable laws related to discrimination in the workplace.

Finally, in response to the COVID-19 pandemic, we continue to provide many employees with the ability to work from home and have implemented

additional safety and infection prevention measures including enhanced cleaning, additional personal protective equipment, testing, and contact tracing
protocols for employees who have transitioned back to critical work on site.

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Corporate Information

On July 24, 2017, Alpine Immune Sciences, Inc., or Private Alpine, completed its business combination with Nivalis Therapeutics, Inc., a publicly
held company. In connection with the merger, Nivalis Therapeutics, Inc. changed its name to Alpine Immune Sciences, Inc. Nivalis Therapeutics, Inc. was
incorporated in Delaware in March 2007. Alpine Immune Sciences, Inc. (prior to its business combination with Nivalis Therapeutics, Inc.) was
incorporated in Delaware on December 30, 2014.

Our principal executive office is located at 188 East Blaine Street, Suite 200, Seattle WA, 98102. Our telephone number is (206) 788-4545. Our

website is www.alpineimmunesciences.com. Information contained in, or that can be accessed through, our website is not a part of, and is not incorporated
into, this report.

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Item 1A. Risk Factors

You should carefully consider the following risk factors, in addition to the other information contained in this Annual Report on Form 10-K, including
Management’s Discussion and Analysis of Financial Condition and Results of Operations included in Part II, Item 7, and our consolidated financial
statements and related notes. If any of the events described in the following risk factors and the risks described elsewhere in this report occurs, our
business, operating results and financial condition could be seriously harmed. Our Risk Factors are not guarantees that no such conditions exist as of the
date of this report and should not be interpreted as an affirmative statement that such risks or conditions have not materialized, in whole or in part. This
report on Form 10-K also contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those
anticipated in the forward-looking statements as a result of factors that are described below and elsewhere in this report.

Risks Related to Our Pipeline and Product Development

Our approach to the discovery and development of innovative therapeutic treatments based on our technology is unproven and may not result in
marketable products.

We plan to develop novel protein-based immunotherapies in part via our proprietary directed evolution platform for the treatment of cancer and

autoimmune/inflammatory diseases. The potential to create therapies capable of working within and/or modulating an immune synapse, forcing a synapse
to occur, or preventing a synapse from occurring is an important, novel attribute of the majority of our approaches. However, the scientific research
forming the basis of our efforts to develop therapeutic candidates based on our platform is relatively new. Further, the scientific evidence to support the
feasibility of developing therapeutic treatments based on our platform is both preliminary and limited.

Relatively few therapeutic candidates based on immunoglobulin superfamily, or IgSF, domains, or tumor necrosis factor receptor super family, or

TNFRSF, domains, have been tested in humans. We may discover the therapeutic candidates developed using our scientific platform do not possess certain
properties required for the therapeutic candidate to be effective. We currently have only limited data to suggest we can introduce these necessary
therapeutic properties into variant Ig domain, or vIgD or variant TNF(R) domain, or vTD, based therapeutic candidates. In addition, vIgDs or vTDs may
demonstrate different chemical and pharmacological properties in human subjects or patients than they do in laboratory studies. Even if our programs have
successful results in animal studies, they may not demonstrate the same chemical and pharmacological properties in humans and may interact with human
biological systems in unforeseen, ineffective, or harmful ways. While we continue to evaluate our vIgDs and vTDs preclinically and clinically, the risk
profile in humans is still being fully assessed. Undesirable side effects that may be caused by our therapeutic 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. Such side effects could also affect patient recruitment or the ability of enrolled patients to complete clinical trials or
result in potential product liability claims. Any of these occurrences may harm our business, financial condition and prospects significantly. As a result, we
may never succeed in developing a marketable therapeutic, we may not become profitable, and the value of our common stock may decline.

Further, we believe that the FDA has little prior experience with vIgDs or vTDs, which may increase the complexity, uncertainty, and length of the

regulatory approval process for our therapeutic candidates. Our company and our current collaborators, or any future collaborators, may never receive
approval to market and commercialize any therapeutic candidate. Even if our company or a collaborator obtains regulatory approval, the approval may be
for disease indications or patient populations not as broad as we intended or desired or may require labeling, including significant use or distribution
restrictions or safety warnings. Our company or a collaborator may be required to perform additional or unanticipated clinical trials to obtain approval or be
subject to post-marketing testing requirements to maintain regulatory approval. If therapeutic candidates we develop using our scientific platform prove to
be ineffective, unsafe, or commercially unviable, our entire platform and pipeline would have little, if any, value, which could have a material adverse
effect on our business, financial condition, results of operations, and prospects.

The market may not be receptive to our therapeutic products based on a novel therapeutic modality, and we may not generate any future revenue from
the sale or licensing of therapeutic products.

Even if approval is obtained for a therapeutic candidate, we may not generate or sustain revenue from sales of the therapeutic product due to factors

such as whether the therapeutic product can be sold at a competitive price and otherwise accepted in the market. Therefore, any revenue from sales of the
therapeutic product may not offset the costs of development. The therapeutic candidates we are developing are based on new technologies and therapeutic
approaches. Market participants with significant influence over acceptance of new treatments, such as physicians and third-party payors, may not adopt a

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treatment based on our therapeutic products, and we may not be able to convince the medical community and third-party payors to accept and use, or to
provide favorable coverage or reimbursement for, any therapeutic products developed by our company, our existing collaborator, or any future
collaborators. Market acceptance of our therapeutic products will depend on, among other factors:

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the timing of our receipt of any marketing and commercialization approvals;

the terms and scope of any approvals and the countries in which approvals are obtained;

the safety and efficacy of our therapeutic products;

the prevalence and severity of any adverse side effects associated with our therapeutic products;

the prevalence and severity of any adverse side effects associated with therapeutics of the same type or class as our therapeutic products;

limitations or warnings contained in any labeling approved by the FDA or other regulatory authority;

relative convenience and ease of administration of our therapeutic products;

the willingness of patients to accept, and the willingness of physicians to prescribe, any new methods of administration;

the success of our physician education programs;

the availability of adequate government and third-party payor coverage and reimbursement;

the willingness of patients to pay out-of-pocket in the absence of coverage by government and third-party payors;

the pricing of our products, particularly as compared to alternative treatments;

our ability to compliantly and effectively market and sell our products;

the timing of market introduction of our therapeutic products as well as alternative treatments; and

availability of alternative effective treatments for the disease indications our therapeutic products are intended to treat and the relative risks,
benefits, and costs of those treatments.

With our development focus, these risks may increase to the extent this field becomes more competitive or less favored in the commercial

marketplace. Additional risks apply in relation to any disease indications we pursue which are classified as rare diseases and allow for orphan drug
designation by regulatory agencies in major commercial markets, such as the United States, European Union, and Japan. Because of the small patient
population for a rare disease, if pricing is not approved or accepted in the market at an appropriate level for an approved therapeutic product with orphan
drug designation, such drug may not generate enough revenue to offset costs of development, manufacturing, marketing, and commercialization despite
any benefits received from the orphan drug designation, such as market exclusivity, assistance in clinical trial design, or a reduction in user fees or tax
credits related to development expense. Market size is also a variable in disease indications classified as rare. Our estimates regarding potential market size
for any rare indication may be materially different from what we discover to exist at the time we commence commercialization, if any, for a therapeutic
product, which could result in significant changes in our business plan and have a material adverse effect on our business, financial condition, results of
operations, and prospects.

If a therapeutic product with orphan drug designation subsequently receives the first FDA approval for the indication for which it has such
designation, the therapeutic product is entitled to orphan product exclusivity, which means the FDA may not approve any other applications to market the
same therapeutic product for the same indication, except in very limited circumstances, for seven years. Orphan drug exclusivity, however, could also block
the approval of one of our therapeutic products for seven years if a competitor obtains approval of the same therapeutic product as defined by the FDA or if
our therapeutic product is determined to be within the same class as the competitor’s therapeutic product for the same indication or disease.

As in the United States, we may apply for designation of a therapeutic product as an orphan drug for the treatment of a specific indication in the
European Union before the application for marketing authorization is made. Sponsors of orphan drugs in the European Union can enjoy economic and
marketing benefits, including up to ten years of market exclusivity for the approved indication unless another applicant can show its therapeutic product is
safer, more effective, or otherwise clinically superior to the orphan-designated therapeutic product. The respective orphan designation and exclusivity
frameworks in the United States and in the European Union are subject to change, and any such changes may affect our ability to obtain EU or U.S. orphan
designations in the future.

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Our therapeutic candidates are in early stages of development and may fail in development or suffer delays that materially and adversely affect their
commercial viability.

We have no products on the market and all of our therapeutic candidates are in early stages of development. Our ability to achieve and sustain

profitability depends on obtaining regulatory approval and Institutional Review Board, or IRB, approval to conduct clinical trials at particular sites,
obtaining regulatory approvals to market our therapeutic candidates and successfully commercializing our therapeutic candidates, either alone or with third
parties, such as our collaborators. Before obtaining regulatory approval for the commercial distribution of our therapeutic candidates, we or a collaborator
must conduct extensive preclinical tests and clinical trials to demonstrate the safety and efficacy in humans of our therapeutic candidates. Preclinical testing
and clinical trials are expensive, difficult to design and implement, can take many years to complete, and are uncertain as to outcome. For example, we are
currently advancing the development of acazicolcept, davoceticept and ALPN-303; however, even with the significant investment of time and funding to
advance these product candidates, we cannot guarantee that our clinical and preclinical development efforts will be successful. The start or end of a clinical
study is often delayed or halted due to delays in or failure to obtain regulatory approval to commence the study, delays in or failure to reach agreement on
acceptable terms with prospective contract research organizations, or CROs, or clinical trial sites, delays in or failure to obtain IRB approval at each site,
changing regulatory requirements, manufacturing challenges, clinical sites or CROs deviating from the trial protocol or failing to comply with regulatory
requirements or meet contractual obligations, slower than anticipated patient enrollment, changing standards of care, availability or prevalence of use of a
comparative therapeutic or required prior therapy, clinical outcomes, failure of patients to complete the trial or return for post-treatment follow-up, or
financial constraints. For instance, delays or difficulties in patient enrollment or difficulties in retaining trial participants can result in increased costs,
longer development times, or termination of a clinical trial. Clinical trials of a new therapeutic candidate require the enrollment of a sufficient number of
patients, which may include patients who are suffering from the disease the therapeutic candidate is intended to treat and who meet other eligibility criteria.
Rates of patient enrollment are affected by many factors, including the size of the patient population, the eligibility criteria for the clinical trial, the age and
condition of the patients, the stage and severity of disease, the nature of the protocol, the proximity of patients to clinical sites, and the availability of
effective treatments or competing academic and other clinical trials for the relevant disease.

A therapeutic candidate can unexpectedly fail at any stage of preclinical and clinical development. The historical failure rate for therapeutic
candidates is high due to scientific feasibility, safety, efficacy, changing standards of medical care, and other variables. The novelty of our platform may
mean our failure rates are higher than historical norms. The results from preclinical testing or early clinical trials of a therapeutic candidate may not predict
the outcome of later phase clinical trials of the therapeutic candidate, particularly in immuno-oncology and autoimmune/inflammatory disorders. We will
have to conduct additional trials in our proposed indications to verify the results obtained to date in our preclinical and clinical studies and to support any
future regulatory submissions. 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 despite promising results in earlier, smaller clinical trials. Moreover, clinical data are often susceptible to
varying interpretations and analyses. We do not know whether Phase 1, Phase 2, Phase 3, or other clinical trials we may conduct will demonstrate
consistent or adequate efficacy and safety with respect to the proposed indication for use sufficient to receive regulatory approval or market our therapeutic
candidates.

We, the FDA, an IRB, an independent ethics committee, or other applicable regulatory authorities may suspend clinical trials of a therapeutic
candidate at any time for various reasons, including a belief that subjects participating in such trials are being exposed to unacceptable health risks or
adverse side effects. Similarly, an IRB or ethics committee may suspend a clinical trial at a particular trial site. We may not have the financial resources to
continue development of, or to enter into collaborations for, a therapeutic candidate if we experience any problems or other unforeseen events delaying or
preventing clinical development or regulatory approval of, or our ability to commercialize, therapeutic candidates, including:

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negative or inconclusive results from our clinical trials, or the clinical trials of others for therapeutic candidates similar to ours, leading to a
decision or requirement to conduct additional preclinical testing or clinical trials or abandon a program;

serious and unexpected drug-related side effects experienced by participants in our clinical trials or by individuals using therapeutics similar
to our therapeutic candidates;

serious drug-related side effects experienced in the past by individuals using therapeutics similar to our therapeutic candidates;

delays in submitting IND applications or clinical trial applications, or comparable foreign applications, or delays or failure in obtaining the
necessary approvals from regulators or IRBs to commence a clinical trial, or a suspension or termination of a clinical trial once commenced;

conditions imposed by the FDA or comparable foreign authorities, such as the European Medicines Agency, or EMA, regarding the scope or
design of our clinical trials;

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delays in enrolling research subjects in clinical trials;

high drop-out rates of research subjects;

inadequate supply or quality of therapeutic candidate or therapeutic candidate components, or materials or other supplies necessary for the
conduct of our clinical trials, including those owned, manufactured, or provided by companies other than ours;

greater than anticipated clinical trial costs, including the cost of any approved drugs used in combination with our therapeutic candidates;

poor effectiveness of our therapeutic candidates during clinical trials;

unfavorable FDA or other regulatory agency inspection and review of a clinical trial site;

failure of our third-party contractors or investigators to comply with regulatory requirements or otherwise meet their contractual obligations in
a timely manner, or at all;

delays and changes in regulatory requirements, policies, and guidelines, including the imposition of additional regulatory oversight around
clinical testing generally or with respect to our technology in particular; or

varying interpretations of data by the FDA and similar foreign regulatory agencies.

Because we have limited financial and operational resources, we must prioritize our research programs and will need to focus our discovery and

development on select product candidates and indications. Correctly prioritizing our research and development activities is particularly important for us due
to the breadth of potential product candidates and indications that we intend to utilize with our clinical development strategy. As a result, we may forego or
delay pursuit of opportunities with other 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 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 also 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 to such product candidate.

Product development involves a lengthy and expensive process with an uncertain outcome, and results of earlier preclinical and clinical trials may not
be predictive of future clinical trial results.

Clinical testing is expensive and generally takes many years to complete, and the outcome is inherently uncertain. Failure can occur at any time
during the clinical trial process. The results of preclinical trials and early clinical trials of our product candidates may not be predictive of the results of
larger, later-stage controlled clinical trials. Product candidates showing promising results in early-stage clinical trials may still suffer significant setbacks in
subsequent clinical trials. We have evaluated acazicolcept in a Phase 1 healthy volunteer trial and previously initiated a Phase 1b/2 study of acazicolcept in
patients with steroid-resistant or steroid-refractory active acute graft-versus-host disease, or SR-aGVHD. We terminated this Phase 1b/2 SR-aGVHD study
in June 2020. Our Phase 2 study in SLE will materially increase our anticipated research and development spending. SLE is a challenging indication and a
number of trials conducted by other companies have failed after significant investment of time and funding. We cannot predict whether our efforts in this
indication will be successful. If we are unsuccessful, it is unlikely that AbbVie would exercise its option for acazicolcept pursuant to our option and license
agreement and, as a result, we would not receive the option payment pursuant to this agreement and we would not be eligible for future milestones and
royalties. In addition, we have initiated our Phase 1 studies of davoceticept as well as our Phase 1 study of ALPN-303 in healthy volunteers. We will have
to conduct additional preclinical studies and human trials in our proposed indications to verify the results obtained to date and to support any regulatory
submissions for further clinical development. 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 despite promising results in earlier, smaller clinical trials. Moreover, clinical data are often
susceptible to varying interpretations and analyses. We do not know whether Phase 1, Phase 2, Phase 3, or other clinical trials we may conduct will
demonstrate consistent or adequate efficacy and safety with respect to the proposed indication for use sufficient to receive regulatory approval or market
our therapeutic candidates.

Additionally, disruptions at the FDA and other agencies may also slow the time necessary for new drugs to be reviewed by necessary government

agencies, which would adversely affect our business. For example, over the last several years, the U.S. government has shut down multiple times and
certain regulatory agencies, such as the FDA, have had to furlough critical FDA and other government employees. In response to the COVID-19 public
health emergency, the FDA has postponed some inspections and continues to conduct “mission-critical” inspections on a case-by-case basis, or, where
possible to do so safely,

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has resumed prioritized domestic inspections, such as pre-approval and surveillance inspections. In 2020 and 2021, a number of companies announced
receipt of complete response letters due to the FDA’s inability to complete required inspections for their applications. While the FDA continues to ensure
timely reviews of applications for medical products during the ongoing COVID-19 pandemic in line with its user fee performance goals and conducting
mission critical domestic and foreign inspections to ensure compliance of manufacturing facilities with FDA Good Manufacturing Practices, the FDA may
not be able to continue its current inspection pace or be unable to complete required inspections during the review period, or the review timelines could be
extended. Regulatory authorities outside the U.S. may adopt similar restrictions or other policy measures in response to the COVID-19 pandemic and may
experience delays in their regulatory activities. If a prolonged government shutdown or other disruption occurs, or if global health or other concerns
continue to prevent the FDA or other regulatory authorities from conducting their regular inspections, reviews, or other regulatory activities in a timely
manner, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which could have a material adverse
effect on our business.

If we encounter delays or difficulties enrolling patients in our clinical trials and/or retention of patients in clinical trials, our clinical development
activities could be delayed or otherwise adversely affected.

We may experience difficulties in patient enrollment in our clinical trials for a variety of reasons, including supply chain disruptions, staffing
shortages and other business and economic disruptions resulting from geopolitical actions, including war and terrorism, natural disasters, including
earthquakes, typhoons, floods and fires, as well as other disruptions resulting from the impact of public health factors, including the COVID-19 pandemic,
business disruptions of our strategic partners, third-party manufacturers, suppliers and other third parties upon which we rely. The timely completion of
clinical trials in accordance with their protocols depends, among other things, on our ability to enroll a sufficient number of patients who remain in the trial
until completion of treatment and adequate follow-up. The enrollment of patients depends on many factors, including:

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Inability to enroll, or delay in enrollment of, patients due to outbreaks and public health crises, such as the COVID-19 global pandemic, as
further described under “Risk Factors — Risks Related to COVID-19 and Other Health Epidemics”;

The patient eligibility criteria defined in the protocol;

The perceived risks and benefits of the product candidate being studied;

The size of the patient population required for analysis of the trial’s primary endpoints;

The proximity of patients to trial sites;

The design of the trial;

Our ability to recruit clinical trial investigators with the appropriate competencies and experience;

Our ability to obtain and maintain patient consent;

Geopolitical events in countries where we have or seek to have clinical trial sites;

Reporting of the preliminary results of any of our clinical trials; and

The risk that patients enrolled in clinical trials will drop out of the trials before completion of treatment and adequate follow-up.

In addition, our clinical trials will compete with other clinical trials for product candidates that are in the same therapeutic areas as our product

candidates, and this competition will 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. Since the number of qualified clinical investigation sites is limited, we
expect to conduct some of our clinical trials at the same clinical trial sites that some of our competitors use, which will reduce the number of patients who
are available for our clinical trials at such clinical trial sites. Geopolitical events in countries where we have or seek to have clinical trial sites can also
negatively impact our ability to enroll patients in our trials. For example, we had intended to open trial sites in Russia for both our ongoing Synergy trial
and our planned Phase 2 trial in SLE with ALPN-303. Following the start of the Russia-Ukraine conflict, we have decided to abandon our plans to open
these sites. Although no sites in Russia had been opened, we must revise our plans and locate alternative trial sites in order to achieve targeted enrollment
numbers for these trials. Any resulting delays in patient enrollment may increase our costs or may affect the timing or outcome of our ongoing and planned
clinical trials, which could prevent completion or commencement of these trials and adversely affect our ability to advance the development of our product
candidates.

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Our product candidates may cause undesirable side effects or have other properties that could halt their clinical development, prevent their regulatory
approval, require expansion of the trial size, limit their commercial potential, or result in significant negative consequences.

Clinical trials that involve cancer patients with significant co-morbidities are associated with increased risks as such participants may be particularly

susceptible to safety and toxicity risks. In addition, these side effects may not be appropriately recognized or managed by the treating medical staff, as
safety and toxicity monitoring may be complicated and difficult to manage, which could result in patient death or other significant issues. Additionally, it
can be difficult to determine if the serious adverse or unexpected side effects were caused by the product candidate or another factors, especially in
oncology subjects who may suffer from other medical conditions and take other medications. Such risks are increased in clinical trials that evaluate
combination therapies.

If serious adverse events or undesirable side effects arise, we could be required to suspend, delay, or halt our clinical trials and regulatory authorities

could deny approval or require us to limit development of that product candidate to certain uses or subpopulations in which the undesirable side effects or
other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. Undesirable side effects could also result in an
expansion in the size of our clinical trials, increasing the expected costs and timeline of our clinical trials. Side effects that are observed during the trial,
whether treatment related or not, could also affect patient recruitment for future trials or the ability of enrolled patients to complete the trial or result in
potential product liability claims.

Further, if serious adverse events or undesirable side effects are identified during development or after approval and are determined to be attributed

to any of our product candidates, we may be required to develop Risk Evaluation and Mitigation Strategies, or REMS, to ensure that the benefits of
treatment with such product candidate outweigh the risks for each potential patient, which may include, among other things, a communication plan to
health care practitioners, patient education, extensive patient monitoring or distribution systems and processes that are highly controlled, restrictive and
more costly than what is typical for the industry.

Any of these occurrences may harm our business, financial condition and prospects significantly. As discussed further in the risk factor below, FDA

placed a partial clinical hold on the NEON-2 trial evaluating davoceticept in combination with Merck’s pembrolizumab in adults with advanced
malignancies. This partial clinical hold was prompted by the death of a study participant in the NEON-2 trial. We are working closely with the FDA,
Merck, the Safety Monitoring Committee, and the study investigators to further understand this event. FDA must lift the partial clinical hold before we can
continue to enroll additional patients in this study. We can provide no assurances that FDA will lift the partial clinical hold for this study, or will do so in a
timely manner. At this time, the full extent of this event on the NEON-2 trial is unclear.

Development of product candidates in combination with other therapies could expose us to additional risks.

Development of any of our product candidates in combination with one or more other therapies that have either been approved or not yet been

approved for marketing by the FDA, EMA or comparable foreign regulatory authorities could expose us to additional risks, as combination therapies may
increase the rate of serious or unexpected adverse events, which could result in a clinical hold as well as pre-approval and post-approval restrictions by the
FDA or other regulatory authorities on the proposed combination therapy, including narrowing of the indication, warnings, additional safety data collection
and monitoring procedures, and REMS, even if the cause of such serious or unexpected adverse events are not directly attributed to our product candidate.
Any of these events or restrictions could have a material adverse effect on our business, development of our product candidates, delay our regulatory
approval, and decrease the market acceptance and profitability of our product candidate if approved for a combination therapy.

We will not be able to market and sell any product candidate in combination with any unapproved therapies that do not ultimately obtain marketing

approval. If the FDA, EMA or other comparable foreign regulatory authorities do not approve or revoke their approval of other therapies used in
combination therapies, or if safety, efficacy, commercial adoption, manufacturing or supply issues arise with the therapies we choose to evaluate in
combination with any of our product candidate, we may be unable to obtain approval of or successfully market any one or all of the product candidates we
develop.

Even if any of our product candidates were to receive marketing approval or be commercialized for use in combination with other existing approved
therapies, we would continue to be subject to the risks that the FDA, EMA or other comparable foreign regulatory authorities could revoke approval of the
other therapy used in combination with any of our product candidates, or safety, efficacy, manufacturing or supply issues could arise with these existing
therapies. In addition, it is possible that existing therapies with which our product candidates are approved for use could themselves fall out of favor or be
relegated to later lines of treatment. This could result in the need to identify other combination therapies for our product candidates or our own products
being removed from the market or being less successful commercially.

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Additionally, if the third-party providers of therapies or therapies in development used in combination with our product candidates are unable to

produce sufficient quantities for clinical trials or for commercialization of our product candidates, or if the cost of combination therapies is prohibitive, our
development and commercialization efforts would be impaired, which would have an adverse effect on our business, financial condition, results of
operations and growth prospects.

On March 7, 2022, we announced that the FDA placed a partial clinical hold on the NEON-2 trial evaluating davoceticept in combination with

Merck’s pembrolizumab in adults with advanced malignancies. This partial clinical hold was prompted by the death of a study participant in the NEON-2
trial. The participant had choroidal melanoma previously treated with nivolumab and ipilimumab, and had received a single dose each of davoceticept and
pembrolizumab. The participant’s death was attributed to cardiogenic shock, considered by the treating physicians as likely related to immune-mediated
myocarditis, or possibly infection. We are working closely with the FDA, Merck, the Safety Monitoring Committee, and the study investigators to further
understand this event and to evaluate the appropriate safety precautions before we resume enrollment of additional participants. Participants who are
currently enrolled in the NEON-2 trial may continue to receive davoceticept and pembrolizumab, although no new participants may be enrolled until the
partial clinical hold is resolved. We can provide no assurances that FDA will lift the partial clinical hold for this study, or will do so in a timely manner.
This partial clinical hold does not affect the ongoing NEON-1 clinical trial of davoceticept as monotherapy (NCT04186637).

At this time, it is unclear what FDA will require before the partial hold can be removed or the full impact of this event. To the extent the FDA
requires additional safety data to be collected in the NEON-2 trial, impose further or more stringent exclusion criteria, expand the size of the trial, or
impose other restrictions or changes to our study protocol, or prolong the partial clinical hold for any reason, our clinical plans for the combination therapy
would be delayed substantially and incur additional costs, which could have an adverse effect on our business, financial condition, results of operations and
growth prospects. We may encounter further challenges with enrollment. If we fail to meet the additional requirements set by the FDA for resolving the
partial clinical hold, we may be required to abandon the development of davoceticept in combination with pembrolizumab. Continued safety concerns
could cause the FDA and other regulatory authorities or the IRB to terminate the NEON-2 trial, narrow the indication or impose other restrictions in the
labeling even if we obtain regulatory approval for the combination therapy, such as implementation of REMS and addition of a black box warning, among
other measures, any of which could decrease the demand, market acceptance and profitability of the combination therapy.

We face competition from entities that have developed or may develop therapeutic candidates for our target disease indications, including companies
developing novel treatments and technology platforms based on modalities and technology similar to us. If these companies develop technologies or
therapeutic candidates more rapidly than we do, or their technologies, including delivery technologies, are more effective, our ability to develop and
successfully commercialize therapeutic candidates may be adversely affected.

We participate in the highly competitive sector of biotechnology and pharmaceuticals and in the subsector of immune modulation. This subsector
has undergone tremendous technological advancement over the last decade due to advancements in understanding the role of the immune system across
multiple therapeutic areas, including oncology and autoimmune/inflammatory disease. While we believe our novel technology platform, discovery
programs, knowledge, experience, and scientific resources offer competitive advantages, we face competition from major pharmaceutical and
biotechnology companies, academic institutions, governmental agencies, public and private research institutions, and others.

Any products we successfully develop and commercialize will face competition from currently approved therapies and new therapies potentially

available in the future.

The availability of reimbursement from government and other third-party payors will also significantly affect the pricing and competitiveness of our
products. Our competitors also may obtain FDA or other regulatory approval for their products more rapidly than we may obtain approval for our products,
which could result in our competitors establishing a strong market position before we are able to enter the market.

Many of the companies we compete against may have significantly greater financial resources and expertise in research and development,

manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals, and marketing approved products. 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 patient
registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs. For additional information regarding
our competitors and the competitive landscape, please refer to the section of this report titled “Business — Competition.”

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Many of our competitors have significantly greater financial, technical, manufacturing, marketing, sales, and supply resources or experience than
we have. If we successfully obtain approval for any therapeutic candidate, we will face competition based on many different factors, including safety and
effectiveness, ease with which our products can be administered and the extent to which patients accept relatively new routes of administration, timing and
scope of regulatory approvals, availability and cost of manufacturing, marketing and sales capabilities, price, reimbursement coverage, and patent position
of our products. Competing products could present superior treatment alternatives, including by being more effective, safer, less expensive, or marketed
and sold more effectively than any products we may develop. Competitive products may make any products we develop obsolete or noncompetitive before
we recover the expense of developing and commercializing our therapeutic candidates. Competitors could also recruit our employees, which could
negatively impact our ability to execute our business plan.

We believe our development programs and platform have a particular mechanism of action, but this mechanism of action has not been proven
conclusively.

Our scientific platform is novel, and the underlying science is not exhaustively understood nor conclusively proven. In particular, the interaction of

vIgDs with the immune synapse, the ability of vIgDs to slow, stop, restart, or accelerate immune responses, and the ability of vIgD domains to interact with
multiple counter structures is still largely theoretical. Graphical representations of proposed mechanisms of action of our therapies, the size, actual or
relative, of our therapeutics, and how our therapeutics might interface with other cells within the human body, inside the immune synapse, or inside the
disease and/or the tumor microenvironment are similarly theoretical and not yet conclusively proven. The lack of a proven mechanism of action may
adversely affect our ability to raise sufficient capital, complete preclinical studies, adequately manufacture drug product, obtain regulatory clearance for
clinical trials, gain marketing approval, or conclude collaborations, or interfere with our ability to market our product to patients and physicians or achieve
reimbursement from payors.

Any inability to present our data in scientific journals or at scientific conferences could adversely impact our business and stock price.

We may from time to time submit data related to our research and development activities in peer-reviewed scientific publications or apply to present

data related to our research and development activities at scientific or other conferences. We have no control over whether these submissions or
applications are accepted. Even if accepted for a conference, we have no control over whether presentations at scientific conferences will be accepted for
oral presentation, poster presentation, or abstract publication only. Even when accepted for publication, we have no control over the timing of the release of
the publication. Rejection by publications, delays in publication, rejection for presentation, or a less-preferred format for a presentation may adversely
impact our stock price, ability to raise capital, and business.

Our business may be affected by adverse scientific publications or editorial or discussant opinions.

We may from time to time publish data related to our research and development activities in peer-reviewed scientific publications or present data
related to our research and development activities at scientific or other conferences. Editorials or discussants unrelated to us may provide opinions on our
presented data unfavorable to us. In addition, scientific publications or presentations may be made which are critical of our science or research or the field
of immunotherapy in general. This may adversely affect our ability to raise necessary capital, complete clinical and preclinical studies, adequately
manufacture drug product, obtain regulatory clearance for clinical trials, or approval for marketing, or interfere with our ability to market our product to
patients and physicians or achieve reimbursement from payors.

Risks Related to Our Relationships with Third Parties

To date, our revenue has been primarily derived from our collaboration agreements, and our success will be dependent, in part, on our collaborators’
efforts to develop our therapeutic candidates.

Our success is dependent, in part, on our collaborators’ efforts to develop our therapeutic candidates and, historically, our revenue has been

primarily derived from our agreements with collaborators. For example, in June 2020, we entered into the AbbVie Agreement for the development of
acazicolcept and in December 2021, we entered into the Horizon Agreement pursuant to which we granted to Horizon rights to one of our existing
preclinical biologic therapeutic programs and we and Horizon agreed to collaborate in the discovery, research and preclinical development of up to three
additional autoimmune and inflammatory disease programs for other designated biological targets.

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Pursuant to the terms of the AbbVie Agreement, we received an upfront payment of $60.0 million in cash and are eligible to receive up to $75.0

million in development milestones (of which $45.0 million was achieved in the second quarter of 2021), an additional $75.0 million if AbbVie exercises its
option with respect to acazicolcept following our completion of certain development activities, additional development, commercial and sales-based
milestones up to an aggregate of $655.0 million and royalties on any future net sales. Pursuant to the AbbVie Agreement, we will conduct certain
development activities under a development plan that provides for, among other things, the generation of a data package in order for AbbVie to evaluate
exercising its exclusive option, including all activities reasonably necessary to complete our Phase 2 study of acazicolcept in SLE. If we successfully
complete these activities, AbbVie may not exercise its option, which would make achievement of future milestones and receipt of future royalties
unattainable. If AbbVie exercises its option, our realization of additional milestones and royalty payments will depend upon the efforts of AbbVie. If
AbbVie fails to develop, obtain regulatory approval for, or ultimately commercialize acazicolcept or if AbbVie terminates the collaboration, our business,
financial condition, results of operations, and prospects could be materially and adversely affected. For additional information regarding the AbbVie
Agreement, please refer to the Partnerships section within “Item 1. Business” of this report.

Pursuant to the terms of the Horizon Agreement, we received an upfront payment of $25.0 million as well as an equity investment for which they

paid $15.0 million. We are also eligible to receive milestone payments upon our achievement of certain preclinical, clinical and regulatory and
commercialization milestones, up to an aggregate amount of $381.0 million per program, or approximately $1.5 billion in total, if all milestones are met, as
well as royalties on future product sales. Pursuant to the Horizon Agreement, we will conduct certain research activities under a research program;
however, even if we successfully perform our obligations under the Horizon Agreement, there is no certainty that Horizon will continue the development of
any of the programs, or, if development is continued, if such programs will ultimately succeed and receive regulatory approval. Horizon will have
discretion in determining and directing its efforts and resources for future development activities and, if approval is obtained, commercialization and
marketing of the approved drug. As a result, there can be no assurances that we will achieve additional milestones pursuant to the Horizon Agreement. For
additional information regarding the Horizon Agreement, please refer to the Partnerships section within “Item 1. Business” of this report.

Our collaborations may also result in reduced royalty revenues if we are unable to obtain and maintain patent protection, as well as if we are unable

to obtain patent term extension, for therapeutic candidates or products developed under our agreements with collaborators. In the event of expiration or
invalidation of patents covering a therapeutic candidate or product, for example, our collaborators may be entitled to a significant decrease in royalty
revenues owed to us under the agreements. Invalidation of patents and failure to obtain patent term extension for one or more patents in our portfolio may
occur as a result of factors beyond our control due to the complex legal and factual questions surrounding pharmaceutical and biotechnology patents. If we
are unable to obtain and maintain patent protection, or if we unable to obtain patent term extension for therapeutic candidates or products developed under
our agreements with collaborators, our revenue derived from our collaborators may be less than the full amount anticipated, and our business, financial
condition, results of operations, and growth prospects could be materially harmed.

Continued advancement of our other product candidates and other development efforts depends, in part, upon the efforts of AbbVie, Horizon, and

our other current or future collaborators. If our collaborators do not dedicate sufficient resources to the development of product candidates that are the
subject of our agreements, such product candidates may never be successful and we may be ineligible to receive additional milestone payments or royalties
pursuant to the terms of our arrangements, which could have a material adverse impact on our financial results and operations. Even if we and our
collaborators dedicate sufficient resources to our collaboration agreements, neither we nor our collaborators may be effective in obtaining approvals for any
therapeutic candidates or, if approved, the successful commercialization of any approved products. Collaborators may change their strategic focus or pursue
alternative technologies after entering into a collaboration agreement with us, which could result in reduced, delayed or no revenue to us. Disputes
regarding collaboration agreements, including disputes pertaining to ownership of intellectual property, may also arise and if we and our collaborators are
unable to resolve such disputes, litigation proceedings may occur, which could further delay development programs, create uncertainty as to ownership of
intellectual property rights, distract management from other business activities and generate substantial expenses, any of which could materially and
negatively impact our business.

If third parties on which we depend to conduct our clinical or preclinical studies, or any future clinical trials, do not perform as expected, fail to satisfy
regulatory or legal requirements, or miss expected deadlines, our development program could be delayed, which may result in materially adverse effects
on our business, financial condition, results of operations, and prospects.

We rely, in part, on third-party clinical investigators, CROs, clinical data management organizations, and consultants to design, conduct, supervise,

and monitor clinical trials and preclinical studies of our therapeutic candidates and may do the same for future clinical trials. Because we rely on third
parties to conduct preclinical studies or clinical trials, we have less control

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over the timing, quality, compliance, and other aspects of preclinical studies and clinical trials than we would if we conducted all preclinical studies and
clinical trials on our own. These investigators, CROs, and consultants are not our employees and we have limited control over the amount of time and
resources they dedicate to our programs. These third parties may have contractual relationships with other entities, some of which may be our competitors,
which may draw their time and resources away from our programs. The third parties with which we contract might not be diligent, careful, compliant, or
timely in conducting our preclinical studies or clinical trials, resulting in the preclinical studies or clinical trials being delayed or unsuccessful. Further, if
any of our relationships with 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 we cannot contract with acceptable third parties on commercially reasonable terms, or at all, or if these third parties do not carry out their
expected duties, satisfy legal and regulatory requirements for the conduct of preclinical studies or clinical trials, or meet expected deadlines, our clinical
development programs could be delayed and otherwise adversely affected. In all events, we are responsible for ensuring each of our preclinical studies and
clinical trials is conducted in accordance with the general investigational plan and protocols for the trial and with legal, regulatory and scientific standards.
The FDA and certain foreign regulatory authorities, such as the EMA, require preclinical studies to be conducted in accordance with applicable Good
Laboratory Practices, or GLPs, and clinical trials to be conducted in accordance with applicable FDA regulations and Good Clinical Practices, or GCPs,
including requirements for conducting, recording, and reporting the results of preclinical studies and clinical trials to assure data and reported results are
credible and accurate and the rights, integrity, and confidentiality of clinical trial participants are protected. Our reliance on third parties we do not control
does not relieve us of these responsibilities and requirements. 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, the EMA 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. Any such event could have a material adverse effect on our business, financial condition, results of operations, and prospects.

In addition, switching or adding additional CROs involves additional cost and requires management time and focus. There is also a natural
transition period when a new CRO commences work. As a result, delays may occur, which could materially impact our ability to meet our desired clinical
development timelines. There can be no assurance that we will not encounter such 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.

Because we rely on third-party manufacturing and supply partners, our supply of clinical trial materials may become limited or interrupted or may not
be of satisfactory quantity or quality, and our dependence on these third parties may impair the advancement of our research and development
programs.

We have established in-house recombinant protein generation capabilities for producing sufficient protein materials to enable a portion of our
current preclinical studies. We rely on third-party supply and manufacturing partners to supply the materials, components, and manufacturing services for a
portion of preclinical studies and also rely on such third parties for all our clinical trial drug supplies. We do not own manufacturing facilities or supply
sources for such components and materials for clinical trial supplies and our current manufacturing facilities are insufficient to supply such components and
materials for all of our preclinical studies. Certain raw materials necessary for the manufacture of our therapeutic products, such as cell lines, are available
from a single or limited number of source suppliers on a purchase order basis. There can be no assurance our supply of research and development,
preclinical study, and clinical trial drugs and other materials will not be limited, interrupted, restricted in certain geographic regions, of satisfactory quality
or quantity, or continue to be available at acceptable prices. In particular, any replacement of our therapeutic substance manufacturer could require
significant effort and expertise and could result in significant delay of our preclinical or clinical activities because there may be a limited number of
qualified replacements. In addition, disruptions to ports and other shipping infrastructure, due in part to the impact of the ongoing COVID-19 pandemic,
may result in shortages or delays impacting the availability of materials and other supplies, which could negatively impact our manufacturers, suppliers and
other third parties on whom we rely. While we have not yet suffered any direct, material negative impacts from these ongoing supply chain disruptions, we
cannot be certain that we will not be impacted, which could increase our costs or negatively impact our development timelines.

The manufacturing process for a therapeutic candidate is subject to FDA and foreign regulatory authority review, and the facilities used by our

contract manufacturers to manufacture our therapeutic candidates must be approved by the FDA pursuant to inspections that will be conducted after we
submit our marketing application(s) to the FDA. Suppliers and manufacturers must meet applicable manufacturing requirements and undergo rigorous
facility and process validation tests required by regulatory authorities in order to comply with cGMP regulations or other regulatory standards. In the event
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our suppliers or manufacturers fails to comply with such requirements or to perform its obligations to us in relation to quality, timing, or otherwise, or if our
supply of components or other materials becomes limited or interrupted for other reasons, we may experience shortages resulting in delayed shipments,
supply constraints, and/or stock-outs of our products, be forced to manufacture the materials alone, for which we currently do not have the capabilities or
resources, or enter into an agreement with another third party, which we may not be able to do on reasonable terms, if at all. In some cases, the technical
skills or technology required to manufacture our therapeutic candidates may be unique or proprietary to the original manufacturer and we may have
difficulty, or there may be contractual and intellectual property restrictions prohibiting us from, transferring such skills or technology to another third party
and a feasible alternative may not exist. These factors may increase our reliance on such manufacturer or require us to obtain a license from such
manufacturer in order to have another third party manufacture our therapeutic candidates. If we are required to change manufacturers for any reason, we
will be required to verify the new manufacturer maintains facilities and procedures complying with quality standards and with all applicable regulations.
The delays associated with the verification of a new manufacturer could negatively affect our ability to develop therapeutic candidates in a timely manner,
within budget, or at all.

We expect to continue to rely on third-party manufacturers if we receive regulatory approval for any therapeutic candidate. To the extent we have
existing, or enter into future, manufacturing arrangements with third parties, we will depend on these third parties to perform their obligations in a timely
manner consistent with contractual and regulatory requirements, including those related to quality control and assurance. If we are unable to obtain or
maintain third-party manufacturing for therapeutic candidates, or to do so on commercially reasonable terms, we may not be able to develop and
commercialize our therapeutic candidates successfully. Our, or a third party’s, failure to execute on our manufacturing requirements could adversely affect
our business in a number of ways, including as a result of:

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an inability to initiate or continue preclinical studies or clinical trials of therapeutic candidates under development;

delay in submitting regulatory applications, or receiving regulatory approvals, for therapeutic candidates;

the loss of the cooperation of a collaborator;

subjecting manufacturing facilities of our therapeutic candidates to additional inspections by regulatory authorities;

requirements to cease distribution or to recall batches of our therapeutic candidates; and

in the event of approval to market and commercialize a therapeutic candidate, an inability to meet commercial demands for our products.

As product candidates progress from preclinical studies to late-stage clinical trials to marketing approval and commercialization, it is common that

various aspects of the development program, such as manufacturing methods, materials and processes, are altered along the way in an effort to optimize
yield, manufacturing batch size, minimize costs and achieve consistent purity, identity, potency, quality and results. Such changes carry the risk that they
will not achieve these intended objectives. Any of these changes could cause our product candidates to perform differently and could affect planned or
other clinical trials conducted with product candidates produced using the modified manufacturing methods, materials, and processes. This could delay
completion of clinical trials and could require non-clinical or clinical bridging and comparability studies, which could increase costs, delay approval of our
product candidates and jeopardize our ability to commercialize our product candidates, if approved.

We may not successfully engage in strategic transactions, including any additional collaborations we seek, which could adversely affect our ability to
develop and commercialize therapeutic candidates, impact our cash position, increase our expenses, and present significant distractions to our
management.

From time to time, we consider strategic transactions, such as collaborations, acquisitions of companies, asset purchases or divestitures, and out- or

in-licensing of therapeutic candidates or technologies. In particular, we intend to evaluate and, if strategically attractive, seek to enter into additional
collaborations, including with major biotechnology or pharmaceutical companies. The competition for collaborative partners is intense, and the negotiation
process is time-consuming and complex. Any new collaboration may be on suboptimal terms for us, and ultimately may not maximize value for our
stockholders. In addition, we may be unable to maintain any new or existing collaboration if, for example, development or approval of a therapeutic
candidate is delayed, sales of an approved therapeutic product do not meet expectations, or the collaborator terminates the collaboration. Any such
collaboration, or other strategic transaction, may require us to incur non-recurring or other charges, increase our near- and long-term expenditures and pose
significant integration or implementation challenges or disrupt our management or business.

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These transactions would entail numerous operational and financial risks, including:

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exposure to unknown liabilities;

disruption of our business and diversion of our management’s time and attention in order to manage a collaboration or develop acquired
therapeutic candidates, or technologies;

incurrence of substantial debt or dilutive issuances of equity securities to pay transaction consideration or costs;

higher than expected collaboration, acquisition, or integration costs;

write-downs of assets, or incurring impairment charges or increased amortization expenses; and

difficulty and cost in facilitating the collaboration or combining the operations and personnel of any acquired business or impairment of
relationships with key suppliers, manufacturers, or customers of any acquired business due to changes in management and ownership and the
inability to retain key employees of any acquired business.

Accordingly, although there can be no assurance we will undertake or successfully complete any transactions of the nature described above, any

transactions we do complete may be subject to the foregoing or other risks and have a material adverse effect on our business, results of operations,
financial condition, and prospects. Conversely, any failure to enter any collaboration or other strategic transaction beneficial to us could delay the
development and potential commercialization of our therapeutic candidates and have a negative impact on the competitiveness of any therapeutic candidate
reaching market.

Risks Related to Our Ability to Commercialize Product Candidates

If any of our therapeutic candidates are approved for marketing and commercialization and we are unable to develop sales, marketing and distribution
capabilities on our own or enter into agreements with third parties to perform these functions on acceptable terms, we may be unable to successfully
commercialize any such future products.

We currently have no sales, marketing, or distribution capabilities or experience. If any of our therapeutic candidates are approved, we will need to
develop internal sales, marketing, and distribution capabilities to commercialize such products, which may be expensive and time-consuming, or enter into
collaborations with third parties to perform these services. If we decide to market our products directly, we will need to commit significant financial, legal,
and managerial resources to develop a marketing and sales force with technical expertise and supporting distribution, administration, and compliance
capabilities. If we rely on third parties with such capabilities to market our approved products, or decide to co-promote products with collaborators, we will
need to establish and maintain marketing and distribution arrangements with third parties, and there can be no assurance we will be able to enter into such
arrangements on acceptable, compliant terms or at all. In entering into third-party marketing or distribution arrangements, any revenue we receive will
depend upon the efforts of the third parties and there can be no assurance such third parties will establish adequate sales and distribution capabilities or be
successful in gaining market acceptance of any approved therapeutic. If we are not successful in commercializing any therapeutic approved in the future,
either on our own or through third parties, our business, financial condition, results of operations, and prospects could be materially and adversely affected.

If we fail to comply with U.S. and foreign regulatory requirements, regulatory authorities could limit or withdraw any marketing or commercialization
approvals we may receive and subject us to other penalties that could materially harm our business.

Our company, our therapeutic candidates, our suppliers, and our contract manufacturers, distributors, and contract testing laboratories are subject to
extensive regulation by governmental authorities in the European Union, the United States, and other countries, with regulations differing from country to
country.

Even if we receive marketing and commercialization approval of a therapeutic candidate, we and our third-party service providers will be subject to

continuing regulatory requirements, including a broad array of regulations related to establishment registration and product listing, manufacturing
processes, risk management measures, quality and pharmacovigilance systems, post-approval clinical studies, labeling and packaging, advertising and
promotional activities, record keeping, distribution, adverse event reporting, import and export of pharmaceutical products, pricing, sales, and marketing,
and fraud and abuse requirements.

Furthermore, the FDA strictly regulates manufacturers’ promotional claims of drug products. In particular, a drug product may not be promoted by

manufacturers for uses that are not approved by the FDA, as reflected in the FDA-approved labeling, although healthcare professionals are permitted to use
drug products for off-label uses. The FDA, the Department of

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Justice, the Inspector General of the Department of Health and Human Services, among other government agencies, actively enforce the laws and
regulations prohibiting manufacturers’ promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject
to significant liability, including large civil and criminal fines, penalties, and enforcement actions. The FDA has also imposed consent decrees or permanent
injunctions under which specified promotional conduct is changed or curtailed for companies that engaged in such prohibited activities. If we cannot
successfully manage the promotion of our approved product candidates, we could become subject to significant liability, which would materially adversely
affect our business and financial condition.

We are required to submit safety and other post market information and reports, and are subject to continuing regulatory review, including in

relation to adverse patient experiences with the product and clinical results reported after a product is made commercially available, both in the United
States and in any foreign jurisdiction in which we seek regulatory approval. The FDA and certain foreign regulatory authorities, such as the EMA, have
significant post-market authority, including the authority to require labeling changes based on new safety information and to require post-market studies or
clinical trials to evaluate safety risks related to the use of a product or to require withdrawal of the product from the market.

The FDA also has the authority to require a REMS plan either before or after approval, which may impose further requirements or restrictions on

the distribution or use of an approved therapeutic. The EMA now routinely requires risk management plans, or RMPs, as part of the marketing
authorization application process, and such plans must be continually modified and updated throughout the lifetime of the product as new information
becomes available. In addition, the relevant governmental authority of any EU member state can request an RMP whenever there is a concern about the
risk/benefit balance of the product.

The manufacturers and manufacturing facilities we use to make a future product, if any, will also be subject to periodic review and inspection by the

FDA and other regulatory agencies, including for continued compliance with cGMP requirements. The discovery of any new or previously unknown
problems with our third-party manufacturers, manufacturing processes or facilities may result in restrictions on the product, manufacturers or facilities,
including withdrawal of the product from the market. If we rely on third-party manufacturers, we will have limited control over compliance with applicable
rules and regulations by such manufacturers.

If we or our collaborators, manufacturers, or service providers fail to comply with applicable continuing regulatory requirements in the U.S. or

foreign jurisdictions in which we seek to market our products, we may be subject to, among other things, fines, warning and untitled letters, clinical holds,
a requirement to conduct additional clinical trials, delay or refusal by the FDA or foreign regulatory authorities to approve pending applications or
supplements to approved applications, suspension, refusal to renew or withdrawal of regulatory approval, product recalls, seizures, or administrative
detention of products, refusal to permit the import or export of products, operating restrictions, inability to participate in government programs including
Medicare and Medicaid, and total or partial suspension of production or distribution, injunction, restitution, disgorgement, debarment, civil penalties, and
criminal prosecution.

Imposed price controls may adversely affect our future profitability.

In most countries, the pricing of prescription drugs is subject to governmental control. In these countries, pricing negotiations with governmental

authorities can take considerable time after receipt of marketing approval for a product. In addition, there can be considerable pressure by governments and
other stakeholders on prices and reimbursement levels, including as part of cost containment measures. Political, economic, and regulatory developments
may further complicate pricing and reimbursement negotiations, and pricing negotiations may continue after reimbursement has been obtained.

Reference pricing used by various EU member states and parallel distribution, or arbitrage between low-priced and high-priced member states, can

further reduce prices. In some countries, we or our collaborators may be required to conduct a clinical trial or other studies comparing the cost-
effectiveness of our therapeutic candidates to other available therapies in order to obtain or maintain reimbursement or pricing approval. Publication of
discounts by third-party payors or authorities may lead to further pressure on the prices or reimbursement levels within the country of publication and other
countries. If reimbursement of any product candidate approved for marketing is unavailable or limited in scope or amount, or if pricing is set at
unsatisfactory levels, our business, financial condition, results of operations, or prospects could be adversely affected.

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, including our use of foreign clinical trial sites. Some of our

suppliers, collaborators and clinical trial relationships are located outside the United States. Accordingly, our future results could be harmed by a variety of
factors, including:

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economic instability or weakness, including inflation, reduced growth, diminished credit availability, weakened consumer confidence or
increased unemployment;

sociopolitical instability in particular foreign economies and markets;

difficulties in compliance with non-U.S. laws and regulations;

changes in non-U.S. regulations and customs, tariffs and trade barriers, including any changes that China may impose as a result of political
tensions between the United States and China;

changes in non-U.S. currency exchange rates and currency controls;

trade protection measures, import or export licensing requirements or other restrictive actions by U.S. or non-U.S. governments;

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

production shortages resulting from any events affecting raw material supply or manufacturing capabilities outside the United States; and

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

Risks Related to Our Personnel and Operations

We will need to raise substantial additional funds to advance development of our therapeutic candidates, and we cannot guarantee we will have
sufficient funds available in the future to develop and commercialize our current or future therapeutic candidates.

We will need to raise substantial additional funds to expand our development, regulatory, manufacturing, marketing, and sales capabilities or
contract with other organizations to provide these capabilities to us. We have used substantial funds to develop our therapeutic candidates and will require
significant funds to conduct further research and development, preclinical testing, and clinical trials of our therapeutic candidates, to seek regulatory
approvals for our therapeutic candidates, and to manufacture and market products, if any are approved for commercial sale. As of December 31, 2021, we
had $215.4 million in cash and cash equivalents, restricted cash, and investments. Based on our current operating plan, we believe our available cash and
cash equivalents, and investments will be sufficient to fund our planned level of operations, including anticipated capital expenditures, for at least the next
12 months. Our future capital requirements and the period for which we expect our existing resources to support our operations may vary significantly from
what we expect. Our monthly spending levels vary based on new and ongoing development and corporate activities. Because the length of time and
activities associated with successful development of our therapeutic candidates are highly uncertain, we are unable to estimate the actual funds we will
require for development and any approved marketing and commercialization activities. To execute our business plan, we will need, among other things:

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to obtain the human and financial resources necessary to develop, test, obtain regulatory approval for, manufacture, and market our
therapeutic candidates;

to build and maintain a strong intellectual property portfolio and avoid infringing intellectual property of third parties;

to establish and maintain successful licenses, collaborations, and alliances;

to satisfy the requirements of clinical trial protocols, including patient enrollment;

to establish and demonstrate the clinical efficacy and safety of our therapeutic candidates;

to obtain regulatory approvals;

to manage our spending as costs and expenses increase due to preclinical studies, clinical trials, regulatory approvals, manufacturing scale-up,
and commercialization;

to obtain additional capital to support and expand our operations; and

to market our products to achieve acceptance and use by the medical community in general.

If we are unable to obtain necessary funding on a timely basis or on acceptable terms, we may have to delay, reduce, or terminate our research and
development programs, preclinical studies, or clinical trials, if any, limit strategic opportunities, or undergo reductions in our workforce or other corporate
restructuring activities. We also could be required to seek funds through

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arrangements with collaborators or others requiring us to relinquish rights to some of our technologies or therapeutic candidates we would otherwise pursue
on our own. We do not expect to realize revenue from product sales, or royalties in the foreseeable future, if at all. Our revenue sources are, and will
remain, extremely limited unless and until our therapeutic candidates are clinically tested, approved for commercialization, and successfully marketed.

To date, we have financed our operations primarily through the sale of equity securities, debt, and payments received under our collaboration

agreements. We will be required to seek additional funding in the future and intend to do so through a combination of public or private equity offerings,
debt financings, credit and loan facilities, research collaborations, and license agreements. Our ability to raise additional funds from these or other sources
will depend on financial, economic, and other factors, many of which are beyond our control. Additional funds may not be available to us on acceptable
terms or at all.

If we raise additional funds by issuing equity securities, our stockholders will suffer dilution, and the terms of any financing may adversely affect

the rights of our stockholders. For example, in January 2019, we issued in a private placement 4,706,700 shares of common stock and warrants to purchase
an additional 1,835,610 shares of common stock for gross proceeds of approximately $25.3 million. In July 2020, we issued in a private placement
5,139,610 shares of common stock, prefunded warrants to purchase 790,710 shares of common stock and warrants to purchase an additional 1,779,096
shares of common stock for gross proceeds of approximately $60.0 million. In September 2021, we issued in a private placement 6,489,357 shares of
common stock and prefunded warrants to purchase an additional 3,191,487 shares of common stock for gross proceeds of approximately $91.0 million. In
December 2021, in connection with the Horizon Agreement, we sold 951,980 shares of our common stock to Horizon for which they paid $15.0 million.
We also have a sales agreement in place with Cowen and Company, LLC, or Cowen, to sell up to $75.0 million of our common stock from time to time
through an “at the market” equity offering under which Cowen will act as sales agent.

In addition, as a condition to providing additional funds to us, future investors may demand, and may be granted, rights superior to those of existing

stockholders. Debt financing, if available, may involve restrictive covenants limiting our flexibility in conducting future business activities, and, in the
event of a liquidation or insolvency, debt holders would be repaid before holders of equity securities receive any distribution of corporate assets. Our failure
to raise capital or enter into such other arrangements within a reasonable timeframe would have a negative impact on our financial condition, and we may
have to delay, reduce, or terminate our research and development programs, preclinical or clinical trials, or undergo reductions in our workforce or other
corporate restructuring activities.

We are an early stage biopharmaceutical company with a history of losses, we expect to continue to incur significant losses for the foreseeable future,
we may never achieve or maintain profitability, and we have a limited operating history that may make it difficult for investors to evaluate the potential
success of our business.

We are a clinical-stage immunotherapy company, with a limited operating history, focused on developing treatments for autoimmune/inflammatory

diseases and cancer. Since inception, we have devoted our resources to developing novel protein-based immunotherapies primarily using our proprietary
directed evolution platform, which converts native immune system proteins into potential differentiated, multi-targeted therapeutics designed to modulate
the immune system. We have had significant operating losses since inception. For the year ended December 31, 2021, our net loss was $50.3 million.
Substantially all of our losses have resulted from expenses incurred in connection with our research programs and from general and administrative costs
associated with our operations. In addition, inflationary pressure could adversely impact our financial results. Our operating costs have increased, and may
continue to increase, due to the recent growth in inflation. Our technologies and therapeutic candidates are in early stages of development, and we are
subject to the risks of failure inherent in the development of therapeutic candidates based on novel technologies.

We have historically generated revenue primarily from the receipt of research funding and upfront and other payments under our collaboration

agreements. We have not generated, and do not expect to generate, any revenue from product sales for the foreseeable future, and we expect to continue to
incur significant operating losses for the foreseeable future due to the cost of research and development, preclinical studies, clinical trials, and the
regulatory approval process for therapeutic candidates. The amount of future losses is uncertain. Our ability to achieve profitability, if ever, will depend on,
among other things, our or our existing collaborators, or any future collaborators, successfully developing therapeutic candidates, obtaining regulatory
approvals to market and commercialize therapeutic candidates, manufacturing any approved products on commercially reasonable terms, establishing a
sales and marketing organization or suitable third-party alternatives for any approved product, and raising sufficient funds to finance business activities. If
we or our existing collaborators, or any future collaborators, are unable to develop and commercialize one or more of our therapeutic candidates or if sales
revenue from any therapeutic candidate receiving approval is insufficient, we will not achieve profitability, which could have a material adverse effect on
our business, financial condition, results of operations, and prospects.

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Interim, preliminary or topline 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 publish interim, preliminary or topline data from 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. Interim or preliminary data from clinical trials that we may conduct may not be indicative of the final results of the trial and are subject to the
risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data becomes available. Interim or
preliminary data also remains subject to audit and verification procedures that may result in the final data being materially different from the interim or
preliminary data. As a result, interim or preliminary data should be viewed with caution until the final data are available. Adverse differences between
interim, preliminary or topline data and final data could significantly harm our reputation and business prospects. We do not know whether any clinical
trials we may conduct will demonstrate consistent or adequate efficacy and safety sufficient to obtain marketing approval to market our product candidates.

Moreover, preliminary, interim and topline data are subject to the risk that one or more of the clinical outcomes may materially change as more

patient data become available when patients mature on study, patient enrollment continues or as other ongoing or future clinical trials with a product
candidate further develop. Past results of clinical trials may not be predictive of future results. In addition, the information we choose to publicly disclose
regarding a particular study or clinical trial is based on what is typically more extensive information, and you or others may not agree with what we
determine is the material or otherwise appropriate information to include in our disclosure. Any information we determine not to disclose may ultimately be
deemed significant with respect to future decisions, conclusions, views, activities or otherwise regarding a particular product candidate or our business.
Similarly, even if we are able to complete our planned and ongoing preclinical studies and clinical trials of our product candidates according to our current
development timeline, the positive results from such preclinical studies and clinical trials of our product candidates may not be replicated in subsequent
preclinical studies or clinical trial results. Moreover, preclinical, nonclinical and clinical data are often susceptible to varying interpretations and analyses,
and many companies that believed their product candidates performed satisfactorily in preclinical studies and clinical trials nonetheless failed to obtain
FDA or other regulatory approval.

Any inability to attract and retain qualified key management and technical personnel would impair our ability to implement our business plan.

Our success largely depends on the continued service of key management and other specialized personnel, including Mitchell H. Gold, M.D., our

Executive Chairman and Chief Executive Officer, Stanford Peng, M.D., Ph.D., our President and Head of Research and Development, and Paul Rickey, our
Senior Vice President and Chief Financial Officer.

The loss of one or more members of our management team or other key employees or advisors could delay our research and development programs

and materially harm our business, financial condition, results of operations, and prospects. The relationships our key managers have cultivated within our
industry make us particularly dependent upon their continued employment with us. We are dependent on the continued service of our technical personnel
because of the highly technical nature of our therapeutic candidates and technologies, and the specialized nature of the regulatory approval process.
Because our management team and key employees are not obligated to provide us with continued service, they could terminate their employment with us at
any time without penalty. We do not maintain key person life insurance policies on any of our management team members or key employees. Our future
success will depend in large part on our continued ability to attract and retain other highly qualified scientific, technical, and management personnel, as
well as personnel with expertise in clinical testing, manufacturing, governmental regulation, and commercialization. We face competition for personnel
from other companies, universities, public and private research institutions, government entities, and other organizations, including significant competition
in the Seattle employment market.

As our therapeutic candidates advance into clinical trials, we may experience difficulties in managing our growth and expanding our operations.

We have limited experience in therapeutic development and very limited experience with clinical trials of therapeutic candidates. As our therapeutic

candidates enter and advance through preclinical studies and clinical trials, we will need to expand our development, regulatory, and manufacturing
capabilities or contract with other organizations to provide these capabilities for us. For example, as we continue enrollment in our Phase 2 study in SLE
and continue with the development of our other product candidates, we will need to hire additional personnel in clinical operations. We also must manage
relationships with collaborators or partners, suppliers, and other organizations. Our ability to manage our operations and future growth will require us to
continue to improve our operational, financial, and management controls, reporting systems, and

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procedures. We may not be able to implement improvements to our management information and control systems in an efficient or timely manner and may
discover deficiencies in existing systems and controls.

Our business entails a significant risk of product liability and our inability to obtain sufficient insurance coverage could harm our business, financial
condition, results of operations, or prospects.

Our business exposes us to significant product liability risks inherent in the development, testing, manufacturing, and marketing of therapeutic
treatments. Product liability claims could delay or prevent completion of our development programs. If we succeed in marketing products, such claims
could result in an investigation by certain regulatory authorities, such as FDA or foreign regulatory authorities, of the safety and effectiveness of our
products, our manufacturing processes and facilities, or our marketing programs and potentially a recall of our products or more serious enforcement
action, limitations on the approved indications for which they may be used, or suspension or withdrawal of approvals. Regardless of the merits or eventual
outcome, liability claims may also result in decreased demand for our products, injury to our reputation, costs to defend the related litigation, a diversion of
management’s time and our resources, substantial monetary awards to trial participants or patients, and a decline in our valuation. We currently have
product liability insurance we believe is appropriate for our stage of development and may need to obtain higher levels of product liability insurance prior
to marketing any therapeutic candidates. Any insurance we have or may obtain may not provide sufficient coverage against potential liabilities.
Furthermore, clinical trial and product liability insurance is becoming increasingly expensive. As a result, we may be unable to obtain sufficient insurance
at a reasonable cost to protect us against losses caused by product liability claims with a potentially material adverse effect on our business.

Our employees may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements, which
could have a material adverse effect on our business.

We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees could include, but is not limited to:

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intentional failures to comply with FDA or U.S. health care laws and regulations, or applicable laws, regulations, guidance, or codes of
conduct set by foreign governmental authorities or self-regulatory industry organizations;

a provision of inaccurate information to any governmental authorities such as FDA;

noncompliance with manufacturing standards we may establish;

noncompliance with federal and state healthcare fraud and abuse laws and regulations;

noncompliance with the U.S. Foreign Corrupt Practices Act (the FCPA) and similar anti-bribery or anti-corruption laws, regulations or rules
of other countries in which we operate; and

a failure to report financial information or data accurately or a failure to disclose unauthorized activities to us.

In particular, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws, regulations, guidance and codes of
conduct intended to prevent fraud, kickbacks, self-dealing and other abusive practices. These laws, regulations, guidance statements, and codes of conduct
may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive program, health care
professional, and other business arrangements. As our business is heavily regulated, it involves significant interaction with government officials, including
potentially officials of non-U.S. governments. Additionally, in many countries, healthcare providers are employed by the government, and the purchasers of
biopharmaceuticals are government entities. As a result, our dealings with are subject to regulation and such healthcare providers and employees of such
purchasers may be considered “foreign officials” as defined in the FCPA. Recently, the Securities and Exchange Commission, or SEC, and Department of
Justice have increased their FCPA enforcement activities with respect to biotechnology companies. We also may be subject to U.S. and foreign export
controls, trade sanctions and import laws and regulations and if we fail to comply with these laws and regulations, we may face significant penalties, finds
and/or denial of certain export privileges.

Employee misconduct could also involve the improper use of information obtained in the course of clinical trials, which could result in regulatory
sanctions, including debarment or disqualification of those employees from participation in FDA regulated activities and serious harm to our reputation.
This could include violations of provisions of the U.S. federal Health Insurance Portability and Accountability Act, or HIPAA, as amended by the Health
Information Technology for Economic and Clinical Health Act, or HITECH, other U.S. federal and state law, and requirements of non-U.S. jurisdictions,
including the European Union General Data Protection Regulation.

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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, regulations, guidance or codes of conduct. Furthermore, we may be held liable under the FCPA and
similar laws in other jurisdictions for the corrupt or other illegal activities of our employees, our third-party business partners, representatives and agents,
even if we do not explicitly authorize such activities. If any such governmental investigations or other actions or lawsuits are instituted against us, and we
are not successful in defending such actions or asserting our rights, those actions could have a significant impact on our business, including the imposition
of significant fines, exclusion from government programs, or other sanctions.

Our business involves the use of hazardous materials and we and our third-party manufacturers must comply with environmental laws and regulations,
which may be expensive and restrict how we conduct business.

Our third-party manufacturers’ activities and our own activities involve the controlled storage, use and disposal of hazardous and flammable
materials, including the components of our pharmaceutical product candidates, test samples and reagents, biological materials and other hazardous
compounds. We and our manufacturers are subject to federal, state, local, and foreign laws and regulations governing the use, generation, manufacture,
storage, handling, and disposal of these hazardous materials. Although we believe our safety procedures for handling and disposing of these materials and
waste products comply with the standards prescribed by these laws and regulations, we cannot eliminate the risk of accidental injury or contamination from
the use, storage, handling, or disposal of hazardous materials. In the event of an accident, state, or federal or other applicable authorities may curtail our use
of these materials and/or interrupt our business operations. In addition, if an accident or environmental discharge occurs, or if we discover contamination
caused by prior operations, including by prior owners and operators of properties we acquire, we could be liable for cleanup obligations, damages, and
fines. If such unexpected costs are substantial, this could significantly harm our financial condition and results of operations.

Compliance with governmental regulations regarding the treatment of animals used in research could increase our operating costs, which would
adversely affect the commercialization of our technology.

The Animal Welfare Act, or AWA, is the federal law covering the treatment of certain animals used in research. Currently, the AWA imposes a wide

variety of specific regulations governing the humane handling, care, treatment, and transportation of certain animals by producers and users of research
animals, most notably relating to personnel, facilities, sanitation, cage size and feeding, watering, and shipping conditions. Third parties with whom we
contract are subject to registration, inspections, and reporting requirements under the AWA. Furthermore, some states have their own regulations, including
general anti-cruelty legislation, which establish certain standards in handling animals. Comparable rules, regulations, and or obligations exist in many
foreign jurisdictions. If we or our contractors fail to comply with regulations concerning the treatment of animals used in research, we may be subject to
fines and penalties and adverse publicity, and our operations could be adversely affected.

Our current operations are concentrated in one location and any events affecting this location may have material adverse consequences.

Our current operations are located in facilities situated in Seattle, Washington. Any unplanned event, such as flood, fire, explosion, earthquake,

extreme weather condition, medical epidemics, power shortage, power outage, telecommunication failure, or other natural or man-made accidents or
incidents resulting in our company being unable to fully utilize the facilities, may have a material adverse effect on our ability to operate our business,
particularly on a daily basis, and have significant negative consequences on our financial and operating conditions. Loss of access to these facilities may
result in increased costs, delays in the development of our therapeutic candidates, or interruption of our business operations. As part of our risk
management policy, we maintain insurance coverage at levels we believe are appropriate for our business. However, in the event of an accident or incident
at these facilities, we cannot assure you the amounts of insurance will be sufficient to satisfy any damages and losses or that the insurance covers all risks.
If our facilities are unable to operate because of an accident or incident or for any other reason, even for a short period of time, any or all of our research
and development programs may be harmed. Any business interruption may have a material adverse effect on our business, financial position, results of
operations, and prospects.

Our business may be affected by litigation and government investigations.

We may from time to time receive inquiries and subpoenas and other types of information requests from government authorities and others and we

may become subject to claims and other actions related to our business activities. While the ultimate outcome of investigations, inquiries, information
requests, and legal proceedings is difficult to predict, defense of

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litigation claims can be expensive, time-consuming and distracting, and adverse resolutions or settlements of those matters may result in, among other
things, modification of our business practices, costs, and significant payments, any of which could have a material adverse effect on our business, financial
condition, results of operations, and prospects.

Risks Related to Our Financial Position and Capital Needs

The investment of our cash and cash equivalents, in fixed income and other marketable securities is subject to risks which may cause losses and affect
the liquidity of these investments.

As of December 31, 2021, we had $215.4 million in cash and cash equivalents, restricted cash, and investments. We expect to invest our excess cash

in fixed income and other marketable securities. These investments are subject to general credit, liquidity, market and interest rate risks. We may realize
losses in the fair value of these investments, an inability to access cash in these investments for a potentially meaningful period, or a complete loss of these
investments, which would have a negative effect on our financial statements.

Our business may be materially affected by changes to fiscal and tax policies. Negative or unexpected tax consequences could adversely affect our
results of operations.

New tax laws, statutes, rules, regulations or ordinances could be enacted at any time, which could adversely affect our business operations, and our
business and financial performance. Further, existing tax laws, statutes, rules, regulations or ordinances could be interpreted, changed, modified or applied
adversely to us. For example, the Tax Cuts and Jobs Act of 2017, or TCJA, enacted in December 2017, as modified by the Coronavirus Aid, Relief, and
Economic Security Act, or the CARES Act, enacted in April 2020, significantly changed the U.S. Internal Revenue Code. Such changes include a
reduction in the corporate tax rate and limitations on certain corporate deductions and credits, among other changes. We have generally accounted for
changes related to the TCJA in accordance with our understanding of the legislation and guidance available as of the date of this filing as described in more
detail in our financial statements and will continue to monitor and assess the impact of the federal legislation on our business and the extent to which
various states conform to the newly enacted federal tax law. In addition, adverse changes in the financial outlook of our operations or further changes in tax
laws or regulations could lead to changes in our valuation allowances against deferred tax assets on our accompanying Consolidated Balance Sheets, which
could materially affect our results of operations.

Nivalis’ pre-merger net operating loss carryforwards and certain other tax attributes are likely subject to limitations. The pre-merger net operating loss
carryforwards and certain other tax attributes of Alpine and of the combined organization may also be subject to limitations as a result of ownership
changes resulting from the merger.

In general, a corporation that undergoes an “ownership change” is subject to limitations on its ability to utilize its pre-change net operating loss

carryforwards, or NOL carryforwards, to offset future taxable income. In general, an ownership change occurs if the aggregate stock ownership of certain
stockholders, generally stockholders beneficially owning five percent or more of a corporation’s common stock, applying certain look-through and
aggregation rules, increases by more than 50 percentage points over such stockholders’ lowest percentage ownership during the testing period, generally
three years. Nivalis may have experienced ownership changes in the past and may experience ownership changes in the future. In addition, the closing of
the merger in 2017 likely resulted in an ownership change for Nivalis. It is likely that, due to the method by which limitations on the utilization of NOL
carryforwards are calculated, we will not be able to utilize any of Nivalis’ NOL carryforwards and certain other tax attributes. It is also possible that
Alpine’s NOL carryforwards and certain other tax attributes may be subject to limitation as a result of ownership changes in the past and/or the closing of
the merger. Consequently, even if we achieve profitability, we may not be able to utilize a material portion of Alpine’s, or any of Nivalis’ NOL
carryforwards and certain other tax attributes, which could have a material adverse effect on cash flow and results of operations.

 Provisions of our debt instruments may restrict our ability to pursue our business strategies.

Our term loan agreement requires us, and any debt financing we may obtain in the future may require us, to comply with various covenants that

limit our ability to, among other things: 

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dispose of assets;

complete mergers or acquisitions;

incur indebtedness;

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encumber assets;

pay dividends or make other distributions to holders of our capital stock;

make specified investments;

engage in any new line or business; and

engagement in certain transactions with our affiliates.

These restrictions could inhibit our ability to pursue our business strategies. If we default under our term loan agreement, including a material

adverse change in our business, operations or condition (financial or otherwise), and such event of default is not cured or waived, the lenders could
terminate commitments to lend and cause all amounts outstanding with respect to the debt to be due and payable immediately, which in turn could result in
cross defaults under other debt instruments. Our assets and cash flow may not be sufficient to fully repay borrowings under our outstanding debt
instruments if some or all of these instruments are accelerated upon a default. We may incur additional indebtedness in the future. The debt instruments
governing such indebtedness could contain provisions that are as, or more, restrictive than our existing debt instruments. If we are unable to repay,
refinance or restructure our indebtedness when payment is due, the lenders could proceed against the collateral granted to them to secure such indebtedness
or force us into bankruptcy or liquidation.

Risks Related to COVID-19 and Other Health Epidemics

The COVID-19 coronavirus could adversely impact our business, including our clinical trials.

In December 2019, a novel strain of coronavirus, SARS-CoV-2, the causative agent of coronavirus disease 2019, or COVID-19, was first reported.

Since then, SARS-CoV-2 has spread globally, including countries in which we have planned or active clinical trial sites. We have experienced and will
likely continue to experience disruptions that could severely impact our business and clinical trials, including:

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delays or difficulties in enrolling patients in our clinical trials;

delays or difficulties in clinical site initiation, including difficulties in recruiting clinical site investigators and clinical site staff;

diversion of healthcare resources away from the conduct of clinical trials, including the diversion of hospitals serving as our clinical trial sites
and hospital staff supporting the conduct of our clinical trials;

interruption of key clinical trial activities, such as clinical trial site monitoring, due to limitations on travel imposed or recommended by
federal or state governments, employers and others;

limitations in employee resources that would otherwise be focused on the conduct of our clinical trials, including because of sickness of
employees or their families or the desire of employees to avoid contact with large groups of people;

delays in receiving approval from local regulatory authorities and ethics committees to initiate our planned clinical trials;

delays in clinical sites receiving the supplies and materials needed to conduct our clinical trials;

interruption in global shipping that may affect the transport of clinical trial materials, such as investigational drug product used in our clinical
trials;

changes in local regulations as part of a response to the COVID-19 coronavirus outbreak which may require us to change the ways in which
our clinical trials are conducted, which may result in unexpected costs, or to discontinue the clinical trials altogether;

delays in necessary interactions with local regulators, ethics committees and other important agencies and contractors due to limitations in
employee resources or forced furlough of government employees; and

refusal of the FDA to accept data from clinical trials whose conduct has been affected by the COVID-19 outbreak, such as due to missing
data.

Further, we may be required to develop and implement additional clinical trial policies and procedures designed to help protect subjects from the

COVID-19 virus. For example, in March 2020, the FDA issued a guidance, which the FDA subsequently updated, on conducting clinical trials during the
pandemic, which describes a number of considerations for sponsors of clinical trials impacted by the pandemic. The FDA has also published other COVID-
19-related industry guidance,

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including updates to previous guidance documents, regarding Good Manufacturing Practices, remote interactive evaluations of drug manufacturing and
bioresearch monitoring facilities, and drug product manufacturing and supply chain inspections, among others. It is possible that additional governmental
action will be taken to address the COVID-19 pandemic. The ultimate impact of the COVID-19 pandemic on our business operations is highly uncertain
and subject to change and will depend on future developments, including new regulatory requirements and changes to existing regulations.

The global outbreak of the COVID-19 coronavirus continues to rapidly evolve. The extent to which the COVID-19 coronavirus may impact our

business and clinical trials will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the duration of
the outbreak, travel restrictions and social distancing in the United States and other countries, business closures or business disruptions and the
effectiveness of actions taken in the United States and other countries to contain and treat the disease. For example, with the increased availability of
vaccines in North America and certain countries around the world, the rate of additional COVID-19 infections and hospitalizations declined in certain
locations for periods of time, resulting in relaxed restrictions and a general reopening of the economy and travel across many jurisdictions, however some
jurisdictions continue to maintain or reimpose restrictions in view of increased hospitalization rates and cases due to COVID-19 variants. While certain of
these developments are positive, reduced vaccine availability, resistance to vaccination by certain persons or ineffectiveness of vaccines against certain
variants may result in increasing infection and hospitalization rates, which could be further complicated by the emergence of more virulent or infectious
variants of the virus.

We face risks related to health epidemics and other outbreaks, which could significantly disrupt our operations and/or business.

Our business could be adversely impacted by the effects of the COVID-19 outbreak originating in China, or by other epidemics. Our supply chain
for raw materials, drug substance or drug product is worldwide, including China, and accordingly could be subject to disruption. There may be restrictions
on the export or shipment of raw materials, drug substance or drug product that could materially delay our business or clinical trials.

Certain of our research and development efforts are also conducted globally, for example the NEON-1 clinical trial and ALPN-303 healthy
volunteer study include investigative sites in Australia and our Synergy trial includes investigative sites in Korea and Poland. A health epidemic or other
outbreak, including the current COVID-19 outbreak, may materially and adversely affect our business, financial condition and results of operations. The
extent to which the outbreak impacts our results will depend on future developments, which are highly uncertain and cannot be predicted, including new
information which may emerge concerning the severity of the outbreak and the actions to contain the outbreak or treat its impact, among others.

Risks Related to Cybersecurity

Our computer systems, or those of any of our CROs, manufacturers, other contractors or consultants or potential future collaborators, may fail or
suffer security or data privacy breaches or incidents or other unauthorized or improper access to, use of, or destruction of our proprietary or
confidential data, employee data, or personal data, which could result in additional costs, loss of revenue, significant liabilities, harm to our brand and
material disruption of our operations.

Despite the implementation of security measures in an effort to protect systems that store our information, given their size and complexity and the

increasing amounts of information maintained on our internal information technology systems, and those of our third-party CROs, other contractors
(including sites performing clinical trials) and consultants, these systems are potentially vulnerable to breakdown or other damage or interruption from
service interruptions, system malfunction, natural disasters, terrorism, war and telecommunication and electrical failures, as well as security breaches and
incidents from inadvertent or intentional actions by our employees, contractors, consultants, business partners, and/or other third parties, or from cyber-
attacks by malicious third parties (including supply chain cyber-attacks or the deployment of harmful malware, ransomware, denial-of-service attacks,
social engineering and other means to affect service reliability and threaten the confidentiality, integrity and availability of information), which may
compromise our system infrastructure or lead to the loss, destruction, alteration, prevention of access to, disclosure, or dissemination of, or damage or
unauthorized access to, our data (including trade secrets or other confidential information, intellectual property, proprietary business information, and
personal information) or data that is processed or maintained on our behalf, or other assets, which could result in financial, legal, business and reputational
harm to us. Companies have experienced an increase in phishing and social engineering attacks from third parties in connection with the COVID-19
pandemic, and the increase in remote working further increases security threats. To the extent that any disruption or security incident were to result in any
loss, destruction, unavailability, alteration, disclosure, or dissemination of, or damage or unauthorized access to, our applications, any other data processed
or maintained on our behalf or other assets, or for it to be believed or reported that any of these occurred, we could incur liability, financial harm and

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reputational damage and the development and commercialization of our product candidates could be delayed. We cannot assure you that our data protection
efforts and our investment in information technology, or the efforts or investments of CROs, consultants or other third parties, will prevent significant
breakdowns or breaches in systems or other cyber incidents that cause loss, destruction, unavailability, alteration or dissemination of, or damage or
unauthorized access to, our data and other data processed or maintained on our behalf or other assets that could have a material adverse effect upon our
reputation, business, operations or financial condition. For example, if such an event were to occur and cause interruptions in our operations, it could result
in a material disruption of our programs and the development of our product candidates could be delayed. In addition, the loss of clinical trial data for our
product candidates could result in delays in our marketing approval efforts and significantly increase our costs to recover or reproduce the data. Further,
any such event that leads to loss, damage, or unauthorized access to, or use, alteration, or disclosure or dissemination of, personal information, including
personal information regarding our clinical trial subjects or employees, could harm our reputation directly, compel us to comply with federal and/or state
breach notification laws and foreign law equivalents, subject us to mandatory corrective action, and otherwise subject us to liability under laws and
regulations that protect the privacy and security of personal information, which could result in significant legal and financial exposure and reputational
damages that could potentially have an adverse effect on our business.

Notifications and follow-up actions related to a security breach or incident could impact our reputation and cause us to incur significant costs,

including legal expenses and remediation costs. For example, the loss of clinical trial data from completed or future clinical trials could result in delays in
our regulatory approval efforts and significantly increase our costs to recover or reproduce the lost data. We expect to incur significant costs in an effort to
detect and prevent security breaches and incidents, and we may face increased costs and requirements to expend substantial resources in the event of an
actual or perceived security breach or incident. We also rely on third parties to manufacture our product candidates, and similar events relating to their
computer systems could also have a material adverse effect on our business. To the extent that any disruption or security incident were to result in any loss,
destruction, or alteration of, unavailability of, or damage or unauthorized access to, our data or other information that is processed or maintained on our
behalf, or inappropriate disclosure of or dissemination of any such information, or if any of these were perceived or reported to have occurred, we could be
exposed to litigation and governmental investigations, the further development and commercialization of our product candidates could be delayed, and we
could be subject to significant fines or penalties for any noncompliance with certain state, federal and/or international privacy and security laws.

Our insurance policies may not be adequate to compensate us for the potential losses arising from any such disruption in or, failure or security

breach or incident of or impacting our systems or third-party systems where information important to our business operations or commercial development
is stored. In addition, such insurance may not be available to us in the future on economically reasonable terms, or at all. Further, our insurance may not
cover all claims made against us and could have high deductibles in any event, and defending a suit, regardless of its merit, could be costly and divert
management attention.

Our information technology systems could face serious disruptions adversely affecting our business.

Our information technology and other internal infrastructure systems, including corporate firewalls, servers, leased lines, and connection to the

Internet, face the risk of systemic failure potentially disruptive to our operations. A significant disruption in the availability of our information technology
and other internal infrastructure systems, or those of third parties that perform services or supply materials to us, could cause interruptions in our
collaborations with our partners and delays in our research and development work.

Our facility is located in Seattle, Washington. We have not undertaken a systematic analysis of the potential consequences to our business and

financial results from a major flood, blizzard, fire, earthquake, power loss, terrorist activity, pandemics or other disasters and do not have a recovery plan
for such disasters. Also, our contract development and manufacturing organizations’ and suppliers’ facilities are located in multiple locations where other
natural disasters or similar events which could severely disrupt our operations, could expose us to liability and could have a material adverse effect on our
business. The occurrence of any of these business disruptions could seriously harm our operations and financial condition and increase our costs and
expenses.

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Risks Related to Our Intellectual Property

If we are not able to obtain and enforce patent protection for our technology, including therapeutic candidates, therapeutic products, and platform
technology, development of our therapeutic candidates and platform, and commercialization of our therapeutic products may be materially and
adversely affected.

Our success depends in part on our ability to obtain and maintain patents and other forms of intellectual property rights, including in-licenses of

intellectual property rights of others, for our technology, including platform technology and therapeutic candidates and products, methods used to
manufacture our therapeutic candidates and products, and methods for treating patients using our therapeutic candidates and products, as well as our ability
to preserve our trade secrets, to prevent third parties from infringing upon our proprietary rights, and to operate without infringing upon the proprietary
rights of others. Our scientific platform and substantially all of our intellectual property have been developed internally. As of December 31, 2021, our
patent portfolio consists of 47 granted patents and over 155 pending patent applications. We may not be able to apply for patents on certain aspects of our
technology, including therapeutic candidates and products, in a timely fashion or at all. Any future patents we obtain may not be sufficiently broad to
prevent others from using our technology or from developing competing therapeutics and technology. There is no guarantee that any of our pending patent
applications will result in issued or granted patents, any of our issued or granted patents will not later be found to be invalid or unenforceable, or any issued
or granted patents will include claims sufficiently broad to cover our technology, including platform technology and therapeutic candidates and products, or
to provide meaningful protection from our competitors. Moreover, the patent position of pharmaceutical and biotechnology companies can be highly
uncertain because it involves complex legal and factual questions. We will be able to protect our proprietary rights from unauthorized use by third parties
only to the extent our current and future technology, including platform technology and therapeutic candidates and products, are covered by valid and
enforceable patents or are effectively maintained as trade secrets. If third parties disclose or misappropriate our proprietary rights, it may materially and
adversely impact our competitive position in the market.

The U.S. Patent and Trademark Office, or USPTO, and various foreign governmental patent agencies require compliance with a number of

procedural, documentary, fee payment, and other provisions during the patent process. There are situations in which noncompliance can result in
abandonment or lapse of a patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. Patent offices may
be affected by COVID-19 or other health epidemic shut-downs, resulting in, for example, non-essential administrative tasks being delayed or eliminated.
This could affect patent rights, including the partial or complete loss of patent rights in jurisdictions such as the USPTO and international patent offices. In
such an event, competitors might be able to enter the market earlier than would otherwise have been the case. Further, the standards applied by the USPTO
and foreign patent offices in granting patents are not always applied uniformly or predictably. For example, there is no uniform worldwide policy regarding
patentable subject matter or the scope of claims allowable in biotechnology and pharmaceutical patents. As such, we do not know the degree of future
protection we will have on our technology, including platform technology and therapeutic candidates and products. While we will endeavor to try to protect
our technology, including platform technology and therapeutic candidates and products, with intellectual property rights such as patents, as appropriate, the
process of obtaining patents is time-consuming, expensive, and sometimes unpredictable, and we can provide no assurances our technology, including our
platform technology, therapeutic candidates and products, will be adequately protected in the future against unauthorized uses or competing claims by third
parties.

In addition, recent and future changes to the patent laws and to the rules of the USPTO or other foreign patent offices may have a significant impact

on our ability to protect our technology, including therapeutic candidates and products, and enforce our intellectual property rights. For example, the
Leahy-Smith America Invents Act enacted in 2011 involves significant changes in patent legislation. In addition, we cannot assure that court rulings or
interpretations of any court decision will not adversely impact our patents or patent applications. In addition to increasing uncertainty with regard to our
ability to obtain patents in the future, there also may be uncertainty with respect to the value of patents, once obtained. Depending on decisions by the U.S.
Congress, the federal courts, the USPTO, or made in foreign jurisdictions, the laws and regulations governing patents could change in unpredictable ways
that would weaken our ability to obtain new patents or to enforce our existing patents and patents we might obtain in the future.

The issuance of a patent is not conclusive as to its inventorship, scope, validity, or enforceability. Once granted, patents may remain open to

opposition, interference, re-examination, post-grant review, inter partes review, revocation, nullification, or derivation action in court or before patent
offices or similar proceedings before or after allowance or grant, during which time third parties can raise objections against such initial grant. In the course
of such proceedings, which may continue for a protracted period of time, the patent owner may be compelled to limit the scope of the pending, allowed or
granted claims thus attacked or may lose the allowed or granted claims altogether. Our patent risks include that:

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others may, or may be able to, make, use, offer to sell, or sell compounds that are the same as or similar to our therapeutic candidates and
products but that are not covered by the claims of the patents we own or license;

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we or our licensors, collaborators, or any future collaborators may not be the first to file patent applications covering certain aspects of our
technology, including our platform technology, therapeutic candidates and products;

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

a third party may challenge our patents and, if challenged, a court may not hold that our patents are valid, enforceable, or that a third party is
infringing;

a third party may challenge our patents in various patent offices and, if challenged, we may be compelled to limit the scope of our pending,
allowed or granted claims or lose the allowed or granted claims altogether;

any issued patents we own or have licensed may not provide us with any competitive advantages, or may be challenged by third parties;

we may not develop additional proprietary technologies that are patentable;

the patents of others could harm our business; and

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

We may license patent rights from third-party owners or licensors. If such owners or licensors do not properly or successfully obtain, maintain or
enforce the patents underlying such licenses, or if they retain or license to others any competing rights, our competitive position and business prospects
may be materially and adversely affected.

We may rely upon intellectual property rights licensed from third parties to protect our technology, including platform technology and therapeutic

candidates and products. To date, we have in-licensed some intellectual property on a non-exclusive basis relating to commercially-available cell lines
involved in the manufacture of our vIgD programs; however, we may also license additional third-party intellectual property in the future, to protect our
technology, including intellectual property relating to our platform technology and therapeutic candidates and products. Our success will depend in part on
the ability of our licensors to obtain, maintain, and enforce patent protection for our licensed intellectual property, in particular those patents to which we
have secured exclusive rights. Our licensors may elect not to prosecute, or may be unsuccessful in prosecuting, any patent applications licensed to us. Even
if patents issue or are granted, our licensors may fail to maintain these patents, may determine not to pursue litigation against other companies infringing
these patents, or may pursue litigation less aggressively than we would. Further, any additional licenses we enter into may be non-exclusive and we may
not be able to obtain exclusive rights, which would potentially allow third parties to develop competing products or technology. Without protection for, or
exclusive right to, any intellectual property we may license, other companies might be able to offer substantially identical or similar product(s) for sale,
which could adversely affect our competitive business position and harm our business prospects. In addition, we may need to sublicense any rights we have
under third-party licenses to current or future collaborators or any future strategic partners. Any impairment of these sublicensed rights could result in
reduced revenue under or result in termination of an agreement by one or more of our collaborators or any future strategic partners.

Patent terms may be inadequate to protect our competitive position on our platform technology and therapeutic candidates and products for an
adequate amount of time.

Patents have a limited lifespan. In the United States and abroad, if all maintenance fees/annuity fees are timely paid, the natural expiration of a
patent is generally 20 years from its earliest non-provisional filing date. The protection a patent affords is limited. Even if patents covering our products are
obtained, once the patent life has expired, we may be open to competition from competitive products. Given the amount of time required for the
development, testing and regulatory review of new products, patents protecting such products might expire before or shortly after such products are
commercialized. As a result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from commercializing
products similar or identical to ours.

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We may be unable to protect our patent intellectual property rights throughout the world.

Obtaining a valid and enforceable issued or granted patent covering our technology, including therapeutic candidates and products, in the United

States and worldwide can be extremely costly. In jurisdictions where we have not obtained patent protection, competitors may use our technology,
including our platform technology and therapeutic candidates and products, to develop their own products, and further, may commercialize such products
in those jurisdictions and export otherwise infringing products to territories where we have not obtained patent protection. In certain instances, a competitor
may be able to export otherwise infringing products in territories where we will obtain patent protection. In jurisdictions outside the United States where
we will obtain patent protection, it may be more difficult to enforce a patent as compared to the United States. Competitor products may compete with our
future products in jurisdictions where we do not or will not have issued or granted patents or where our issued or granted patent claims or other intellectual
property rights are not sufficient to prevent competitor activities in these jurisdictions. The legal systems of certain countries, particularly certain
developing countries, make it difficult to enforce patents and such countries may not recognize other types of intellectual property protection, particularly
relating to biopharmaceuticals. This could make it difficult for us to prevent the infringement of our patents or marketing of competing products in
violation of our proprietary rights generally in certain jurisdictions. Proceedings to enforce our patent rights in foreign jurisdictions could result in
substantial cost and divert our efforts and attention from other aspects of our business.

We generally file a provisional patent application first (a priority filing) at the USPTO. An international application under the Patent Cooperation

Treaty, or PCT, is usually filed within twelve months after the priority filing, at times with a United States filing. Based on the PCT filing, national and
regional patent applications may be filed in various international jurisdictions, such as in Europe, Japan, Australia, Canada, and the United States. We have
so far not filed for patent protection in all national and regional jurisdictions where such protection may be available. In addition, we may decide to
abandon national and regional patent applications before they are granted. Finally, the grant proceeding of each national or regional patent is an
independent proceeding which may lead to situations in which applications might in some jurisdictions be refused by the relevant registration authorities,
while granted by others. It is also quite common that, depending on the country, various scopes of patent protection may be granted on the same therapeutic
candidate, product, or technology. The laws of some jurisdictions do not protect intellectual property rights to the same extent as the laws in the United
States, and many companies have encountered significant difficulties in protecting and defending such rights in such jurisdictions. If we or our licensors
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. Many countries
have compulsory licensing laws under which a patent owner may be compelled to grant licenses to third parties. In addition, many 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 or any of our licensors are forced to grant a license to third parties with respect to any patents
relevant to our business, our competitive position in the relevant jurisdiction may be impaired and our business and results of operations may be adversely
affected.

We or our licensors, collaborators, or any future strategic partners may become subject to third-party claims or litigation alleging infringement of
patents or other proprietary rights or seeking to invalidate patents or other proprietary rights, and we may need to resort to litigation to protect or
enforce our patents or other proprietary rights, all of which could be costly, time consuming, delay or prevent the development of our therapeutic
candidates and commercialization of our therapeutic products, or put our patents and other proprietary rights at risk.

We or our licensors, licensees, collaborators, or any future strategic partners may be subject to third-party claims for infringement or

misappropriation of patent or other proprietary rights. We are generally obligated under our license or collaboration agreements to indemnify and hold
harmless our licensors, licensees, or collaborators for damages arising from intellectual property infringement by us. If we or our licensors, licensees,
collaborators, or any future strategic partners are found to infringe a third-party patent or other intellectual property rights, we could be required to pay
damages, potentially including treble damages, if we are found to have willfully infringed. In addition, we or our licensors, licensees, collaborators, or any
future strategic partners may choose to seek, or be required to seek, a license from a third party, which may not be available on acceptable terms, if at all.
Even if a license can be obtained on acceptable terms, the rights may be non-exclusive, which could give our competitors access to the same technology or
intellectual property rights licensed to or from us. If we fail to obtain a required license, we or our licensee or collaborator, or any future licensee or
collaborator, may be unable to effectively market therapeutic products based on our technology, which could limit our ability to generate revenue or
achieve profitability and possibly prevent us from generating revenue sufficient to sustain our operations. In addition, we may find it necessary to pursue
claims or initiate lawsuits to protect or enforce our patent or other intellectual property rights. The cost to us in defending or initiating any litigation or other
proceeding relating to patent or other proprietary rights, even if resolved in our favor, could be substantial, and litigation would divert our management’s
attention. Some of our competitors may be able to

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sustain the costs of complex patent litigation more effectively than we can because they have substantially greater resources. Uncertainties resulting from
the initiation and continuation of patent litigation or other proceedings could delay our research and development efforts and limit our ability to continue
our operations.

Although we do not believe our technology infringes the intellectual property rights of others, we are aware of one or more patents or patent
applications that may relate to our technology, and third parties may assert against our products alleging infringement of their intellectual property rights
regardless of whether their claims have merit. Infringement claims could harm our reputation, may result in the expenditure of significant resources to
defend and resolve such claims, and could require us to pay monetary damages if we are found to have infringed the intellectual property rights of others.

If we were to initiate legal proceedings against a third party to enforce a patent covering our technology, including therapeutic candidates and

products, the defendant could counterclaim that our patent is invalid or unenforceable. In patent litigation in the United States, defendant counterclaims
alleging invalidity or unenforceability are commonplace. Grounds for a validity challenge could be an alleged failure to meet any of several statutory
requirements, for example, patent ineligibility, lack of novelty, lack of written description, obviousness, or non-enablement. Grounds for an
unenforceability assertion could be an allegation someone connected with prosecution of the patent withheld relevant information from the USPTO, or
made a misleading statement, during prosecution. 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 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 or unenforceability, we would lose at least part,
and perhaps all, of the patent protection on our technology, including our platform technology and therapeutic candidates and products. Such a loss of
patent protection could have a material adverse impact on our business. Patents and other intellectual property rights also will not protect our technology,
including our platform technology and therapeutic candidates and products, if competitors design around our protected technology, including our platform
technology and therapeutic candidates and products, without legally infringing our patents or other intellectual property rights.

It is also possible we have failed to identify relevant third-party patents or applications. For example, patent applications in the United States and

elsewhere are 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. Therefore, patent applications covering our technology, including our platform technology and therapeutic candidates and
products, could have been filed by others without our knowledge. Additionally, pending patent applications which have been published can, subject to
certain limitations, be later amended in a manner that could cover our technology, including our platform technology and therapeutic candidates and
products. Third-party intellectual property rights holders may also actively bring infringement claims against us. We cannot guarantee we will 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 in or continue costly, unpredictable, and time-consuming litigation and may be prevented from, or experience substantial delays in,
marketing our technology, including therapeutic candidates and products. If we fail in any such dispute, in addition to being forced to pay damages, we may
be temporarily or permanently prohibited from commercializing our technology, including a therapeutic product, held to be infringing. We might, if
possible, also be forced to redesign therapeutic candidates or products so we no longer infringe the third-party intellectual property rights. Any of these
events, even if we were ultimately to prevail, could require us to divert substantial financial and management resources we would otherwise be able to
devote to our business.

If we fail to comply with our obligations under any license, collaboration, or other agreements, we may be required to pay damages and could lose
intellectual property rights necessary for developing and protecting our technology, including our platform technology, therapeutic candidates, and
therapeutic products, or we could lose certain rights to grant sublicenses, either of which could have a material adverse effect on our results of
operations and business prospects.

Our current licenses impose, and any future licenses we enter into are likely to impose, various development, commercialization, funding,
milestone, royalty, diligence, sublicensing, insurance, patent prosecution and enforcement, and other obligations on us. If we breach any of these
obligations, or use the intellectual property licensed to us in an unauthorized manner, we may be required to pay damages and the licensor may have the
right to terminate the license, which could result in us being unable to develop, manufacture, and sell or offer to sell products covered by the licensed
technology or enable a competitor to gain access to the licensed technology. Moreover, our licensors may own or control intellectual property that has not
been licensed to us and, as a result, we may be subject to claims, regardless of their merit, that we are infringing or otherwise violating the licensor’s rights.
In addition, while we cannot currently determine the amount of the royalty obligations we would be required to pay on future sales of licensed products, if
any, the amounts may be significant. The amount of our future royalty obligations will depend on the technology and intellectual property we use in
therapeutic products we successfully develop and commercialize, if any. Therefore, even if we successfully develop and commercialize therapeutic
products, we may be unable to achieve or maintain profitability.

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If we do not obtain patent term extension and data exclusivity for any therapeutic candidate or product we may develop, our business may be materially
harmed.

Depending upon the timing, duration, and specifics of any FDA marketing approval of any therapeutic candidate or product we may develop, one or

more of our or in-licensed U.S. patents may be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration
Act of 1984 (Hatch-Waxman Act). The Hatch-Waxman Act permits a patent term extension of up to five years as compensation for patent term lost during
the FDA regulatory review process. A 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 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 extensions as compensation for patent term lost during regulatory review processes are also available in certain foreign
countries and territories, such as in Europe under a Supplementary Patent Certificate. However, we may not be granted an extension in the United States
and/or foreign countries and territories because of, for example, failing to exercise due diligence during the testing phase or regulatory review process,
failing to apply within applicable deadlines, failing to apply prior to expiration of relevant patents, or otherwise failing to satisfy applicable requirements.
Moreover, the applicable time period or the scope of patent protection afforded could be less than we request. If we are unable to obtain patent term
extension or the term of any such extension is shorter than what we request, our competitors may obtain approval of competing products following our
patent expiration, and our business, financial condition, results of operations, and growth prospects could be materially harmed.

If we are unable to protect the confidentiality of our trade secrets, our business and competitive position would be harmed.

In addition to seeking patent protection for certain aspects of our technology, including platform technology and therapeutic candidates and
products, we also consider trade secrets, including confidential and unpatented know-how, important to the maintenance of our competitive position. We
protect trade secrets and confidential and unpatented know-how, in part, by entering into non-disclosure and confidentiality agreements with parties who
have access to such knowledge, such as our employees, corporate collaborators, outside scientific collaborators, CROs, contract manufacturers, consultants,
advisors, and other third parties. We also enter into confidentiality and invention or patent assignment agreements with our employees and consultants
obligating them to maintain confidentiality and assign their inventions to us. Despite these efforts, any of these parties may breach the agreements and
disclose our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. We also cannot
guarantee that we have entered into such agreements with each party that may have or has had access to our trade secrets or proprietary technology and
processes. Enforcing a claim in the event of a party illegally disclosing or misappropriating a trade secret is difficult, expensive, and time-consuming, and
the outcome is unpredictable. In addition, some courts in the United States and certain foreign jurisdictions are less willing or unwilling to protect trade
secrets. If any of our trade secrets were to be lawfully obtained or independently developed by a competitor, 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, our
competitive position would be harmed.

We are also subject both in the United States and outside the United States to various regulatory schemes regarding requests for the information we

provide to regulatory authorities, which may include, in whole or in part, trade secrets or confidential commercial information. While we are likely to be
notified in advance of any disclosure of such information and would likely object to such disclosure, there can be no assurance our challenge to the request
would be successful.

We may be in the future subject to claims we or our employees or consultants have wrongfully used or disclosed alleged trade secrets of our employees’
or consultants’ former employers or their clients. These claims may be costly to defend and if we do not successfully do so, we may be required to pay
monetary damages, may be prohibited from using some of our research and development and may lose valuable intellectual property rights or
personnel.

Many of our employees were previously employed at universities or biotechnology or pharmaceutical companies, including our current and
potential competitors. We may receive correspondence from other companies alleging the improper use or disclosure, and have received, and may in the
future receive, correspondence from other companies regarding the use or disclosure, by certain of our employees who have previously been employed
elsewhere in our industry, including with our competitors, of their former employer’s trade secrets or other proprietary information. Responding to these
allegations can be costly and disruptive to our business, even when the allegations are without merit, and can be a distraction to management. We may be
subject to claims in the future that our employees have, or we have, inadvertently or otherwise used or disclosed trade secrets or other proprietary
information of their former employers. Litigation may be necessary to defend against these claims. If we fail in defending current or future claims, in
addition to paying monetary damages, we may lose valuable intellectual property rights, personnel, or the ability to use some of our research and
development. A loss of intellectual property, key research personnel, or their work product could hamper our ability to commercialize, or prevent us from
commercializing, our

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therapeutic candidates, which could severely harm our business. Even if we are successful in defending against these claims, litigation could result in
substantial costs and be a distraction to management.

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 materially and adversely affected.

Our trademarks or trade names may be challenged, infringed, circumvented, or declared generic or determined to be infringing on other marks. Any
trademark litigation could be expensive. We may not be able to protect our rights to these trademarks and trade names or may be forced to stop using these
names, which we need for name recognition by potential partners or customers in our markets of interest. 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 materially and adversely affected.

Third parties may independently develop similar or superior technology.

There can be no assurance others will not independently develop, or have not already developed, similar or more advanced technologies than our
technology or that others will not design around, or have not already designed around, aspects of our technology or our trade secrets developed therefrom.
If third parties develop technology similar or superior to our technology, or they successfully design around our current or future technology, our
competitive position, business prospects, and results of operations could be materially and adversely affected.

Breaches of our internal computer systems, or those of our contractors, vendors, or consultants, may place our patents or proprietary rights at risk.

The loss of clinical or preclinical data or data from any future clinical trial involving our technology, including therapeutic candidates and products,
could result in delays in our development and regulatory filing efforts and significantly increase our costs. In addition, theft or other exposure of data may
interfere with our ability to protect our intellectual property, including trade secrets, and other information critical to our operations. We have experienced
in the past, and may experience in the future, unauthorized intrusions into our internal computer systems, including portions of our internal computer
systems storing information related to our platform technology, therapeutic candidates and products, and we can provide no assurances that certain sensitive
and proprietary information relating to one or more of our therapeutic candidates or products has not been, or will not in the future be, compromised.
Although we have invested significant resources to enhance the security of our computer systems, there can be no assurances we will not experience
additional unauthorized intrusions into our computer systems, or those of our CROs, vendors, contractors, and consultants, that we will successfully detect
future unauthorized intrusions in a timely manner, or that future unauthorized intrusions will not result in material adverse effects on our financial
condition, reputation, or business prospects. Payments related to the elimination of ransomware may materially affect our financial condition and results of
operations.

Certain data breaches must also be reported to affected individuals and the government, and in some cases to the media, under provisions of HIPAA,

as amended by HITECH, other U.S. federal and state law, and requirements of non-U.S. jurisdictions, including the European Union General Data
Protection Regulation, and financial penalties may also apply.

Risks Related to Government Regulation

We may be unable to obtain U.S. or foreign regulatory approval and, as a result, may be unable to commercialize our therapeutic candidates.

Our therapeutic candidates are subject to extensive governmental regulations relating to, among other things, research, development, testing,

manufacture, quality control, approval, labeling, packaging, promotion, storage, record-keeping, advertising, distribution, sampling, pricing, sales and
marketing, safety, post-approval monitoring and reporting, and export and import of drugs. Rigorous preclinical testing and clinical trials and an extensive
regulatory approval process are required to be completed successfully in the United States and in many foreign jurisdictions before a new therapeutic can
be marketed. Satisfaction of these and other regulatory requirements is costly, time consuming, uncertain, and subject to unanticipated delays. We have not
obtained regulatory approval for any therapeutic candidates, and it is possible none of the therapeutic candidates we may develop will obtain the regulatory
approvals necessary for us or our collaborators to begin selling them.

We have very limited experience in conducting and managing the clinical trials necessary to obtain regulatory approvals, including approval by the

FDA as well as foreign regulatory authorities, such as the EMA. The time required to obtain FDA and foreign regulatory approvals is unpredictable but
typically takes many years following the commencement of clinical trials,

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depending upon the type, complexity, and novelty of the therapeutic candidate, and at the substantial discretion of the regulatory authorities. The standards
the FDA and its foreign counterparts use when regulating us are not always applied predictably or uniformly and can change. Any analysis we perform of
data from preclinical and clinical activities is subject to confirmation and interpretation by regulatory authorities, who could delay, limit, or prevent
regulatory approval. We may also encounter unexpected delays or increased costs due to new government regulations, future legislation or administrative
action, or from changes in the policy of FDA or foreign regulatory authorities during the period of product development, clinical trials, and regulatory
review by the FDA or foreign regulatory authorities. It is impossible to predict whether legislative changes will be enacted, or whether FDA or foreign,
regulations, guidance, or interpretations will be changed, or what the impact of such changes, if any, may be.

Because the therapeutic candidates we are developing may represent a new class of therapeutics, we are not aware of any definitive policies,
practices, or guidelines that the FDA or its foreign counterparts have established in relation to these drugs. While we believe the therapeutic candidates we
are currently developing are regulated as new biological products under the Public Health Service Act, or PHSA, the FDA could decide to regulate them or
other products we may develop as drugs under the Federal Food, Drug, and Cosmetic Act, or FDCA. The lack of policies, practices, or guidelines may
hinder or slow review by the FDA or foreign regulatory authorities of any regulatory filings we may submit. Moreover, the FDA or foreign regulatory
authorities may respond to these submissions by defining requirements we may not have anticipated. Such responses could lead to significant delays in the
clinical development of our therapeutic candidates.

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

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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 therapeutic 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 therapeutic 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 therapeutic candidates may not be sufficient to support the submission of a BLA or other
submission or to obtain regulatory approval in the United States, the European Union or elsewhere;

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; 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.

Any delay or failure in obtaining required approvals could have a material adverse effect on our ability to generate revenues from the particular

therapeutic candidate for which we are seeking approval. The FDA, the EMA and other regulatory authorities have substantial discretion in the approval
process, and in determining when or whether regulatory approval will be obtained for any of our therapeutic candidates. Even if we believe the data
collected from preclinical and clinical trials of our therapeutic candidates are promising, such data may not be sufficient to support approval by the FDA,
the EMA or any other regulatory authority. Furthermore, any regulatory approval to market a product may be subject to limitations on the approved uses for
which we may market the product or in the product labeling or be subject to other restrictions. Regulatory authorities also may impose requirements for
costly post-marketing studies or clinical trials and surveillance to monitor the safety or efficacy of the therapeutic. In addition, the FDA has the authority to
require a REMS plan as part of the approval of a BLA or NDA, or after approval, which may impose further requirements or restrictions on the distribution
or use of an approved drug or biologic, such as limiting prescribing to certain physicians or medical centers that have undergone specialized training,
limiting treatment to patients who meet certain safe-use criteria, and requiring treated patients to enroll in a registry. These limitations and restrictions may
limit the size of the market for the therapeutic and affect coverage and reimbursement by third-party payors.

We are also subject to numerous foreign regulatory requirements governing, among other things, the conduct of clinical trials, manufacturing,
marketing authorization, pricing, and third-party reimbursement. The foreign regulatory approval process varies among countries and may include all of the
risks associated with FDA approval described above as well as risks

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attributable to the satisfaction of local regulations in foreign jurisdictions. Moreover, the time required to obtain approval may differ from that required to
obtain FDA approval. Approval by the FDA does not ensure approval by regulatory authorities outside the U.S. and vice versa.

If we fail to obtain orphan drug designation or obtain or maintain orphan drug exclusivity for certain of our products, our competitors may sell
products to treat the same conditions and our revenue may be reduced.

Under the Orphan Drug Act, the FDA may designate a product as an orphan drug if it is intended to treat a rare disease or condition, defined as a

patient population of fewer than 200,000 in the United States, or a patient population greater than 200,000 in the United States where there is no reasonable
expectation that the cost of developing the drug will be recovered from sales in the United States. In the United States, orphan drug designation entitles a
party to financial incentives such as opportunities for grant funding towards clinical trial costs, tax advantages and user-fee waivers. In addition, if a
therapeutic product with orphan drug designation subsequently receives the first FDA approval for the indication for which it has such designation, the
therapeutic product is entitled to orphan product exclusivity, which means the FDA may not approve any other applications to market the same therapeutic
product for the same indication for seven years, except in limited circumstances such as a showing of clinical superiority over the product with orphan
exclusivity or where the manufacturer is unable to assure sufficient product quantity.

As in the United States, we may apply for designation of a therapeutic candidate as an orphan drug for the treatment of a specific indication in the

European Union before the application for marketing authorization is made. In the European Union, the EMA’s Committee for Orphan Medicinal Products,
grants orphan drug designation to promote the development of products that are intended for the diagnosis, prevention or treatment of a life-threatening or
chronically debilitating condition affecting not more than five in 10,000 persons in the European Union. Additionally, designation is granted for products
intended for the diagnosis, prevention or treatment of a life-threatening, seriously debilitating or serious and chronic condition when, without incentives, it
is unlikely that sales of the drug in the European Union would be sufficient to justify the necessary investment in developing the drug or biological product
or where there is no satisfactory method of diagnosis, prevention or treatment, or, if such a method exists, the medicine must be of significant benefit to
those affected by the condition. Sponsors of orphan drugs in the European Union can enjoy economic and marketing benefits, including reduction of fees or
fee waivers and up to ten years of market exclusivity for the approved indication unless another applicant can show its therapeutic product is safer, more
effective, or otherwise clinically superior to the orphan-designated therapeutic product. This period may be reduced to six years if the orphan drug
designation criteria are no longer met, including where it is shown that the product is sufficiently profitable not to justify maintenance of market
exclusivity.

We may seek orphan drug designation from the FDA and the EMA for certain of our product candidates. However, we may never receive such
designation. Even if we are able to obtain orphan designation, we may not be the first to obtain marketing approval for any particular orphan indication due
to the uncertainties associated with developing pharmaceutical products. In addition, exclusive marketing rights in the United States may be limited if we
seek approval for an indication broader than the orphan-designated indication or 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. Further, even if we obtain orphan drug exclusivity for a product, that exclusivity may not effectively protect the product from competition
because different drugs with different active moieties can be approved for the same condition. Even after an orphan drug is approved, regulatory authorities
may subsequently approve the same drug with the same active moiety for the same condition if they conclude that the later drug is safer, more effective, or
makes a major contribution to patient care. Orphan drug designation neither shortens the development time or regulatory review time of a product
candidate nor gives the product candidate any advantage in the regulatory review or approval process. In addition, orphan drug exclusivity could block the
approval of one of our therapeutic candidates if a competitor obtains approval of the same therapeutic product as defined by the FDA before we do, or if
our therapeutic candidate is determined to be within the same class as the competitor’s therapeutic product for the same indication or disease.

The respective orphan designation and exclusivity frameworks in the United States and in the European Union are subject to change, and any such

changes may affect our ability to obtain EU or U.S. orphan designations in the future.

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If we or our existing or future collaborators, manufacturers, or service providers fail to comply with healthcare laws and regulations, we or such other
parties could be subject to enforcement actions, which could adversely affect our ability to develop, market, and sell our therapeutics and may harm our
reputation.

Although we do not currently have any products on the market, once we begin commercializing our therapeutic candidates, if approved, we will be
subject to additional healthcare statutory and regulatory requirements and enforcement by the federal, state, and foreign governments of the jurisdictions in
which we conduct our business. Healthcare providers, physicians, and third-party payors play a primary role in the recommendation and prescription of any
therapeutic candidates for which we obtain marketing approval. Our future arrangements with third-party payors and customers may expose us to broadly
applicable fraud, abuse, and other healthcare laws and regulations constraining the business or financial arrangements and relationships through which we
market, sell, and distribute the therapeutic candidates for which we obtain marketing approval. Restrictions under applicable federal and state healthcare
laws and regulations include the following:

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the U.S. federal Anti-Kickback Statute, which prohibits, among other things, persons from soliciting, receiving, offering, or providing
remuneration, directly or indirectly, to induce either the referral of an individual for a healthcare item or service, or the purchasing or ordering
of an item or service, for which payment may be made, in whole or in part, under a federal healthcare program such as Medicare or Medicaid;

the U.S. federal False Claims Act, which imposes criminal and civil penalties, including through civil whistleblower or qui tam actions,
against individuals or entities for knowingly presenting, or causing to be presented, to the federal government, false or fraudulent claims for
payment or making a false statement to avoid, decrease, or conceal an obligation to pay money to the federal government. In addition, the
government may assert 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 False Claims Act;

state all-payor fraud laws, which impose criminal and civil liability for executing 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 statute or specific intent to violate it in order to have committed a violation;

HIPAA, HITECH, and their implementing regulations, which impose obligations on certain covered entity healthcare providers, health plans,
and healthcare clearinghouses as well as their business associates performing certain services involving the use or disclosure of individually
identifiable health information, including mandatory contractual terms, with respect to safeguarding the privacy, security, and transmission of
individually identifiable health information, and require notification to affected individuals and regulatory authorities of certain breaches of
security of individually identifiable health information;

the federal Physician Payment Sunshine Act and its implementing regulations, also referred to as “Open Payments,” require applicable
manufacturers of pharmaceutical and biological drugs, among other covered medical products, reimbursable under Medicare, Medicaid, or
Children’s Health Insurance Programs to track and report to the CMS certain payments and transfers of value made in the previous year,
including but not limited to, consulting fees, travel reimbursements, and research grants made to cover recipients, including physicians
(defined to include doctors, dentists, optometrists, podiatrists and chiropractors), certain non-physician healthcare professionals (such as
physician assistants and nurse practitioners, among others), and teaching hospitals, as well as information regarding physicians’ and their
immediate family members’ ownership and investment interests in the applicable manufacturer, with limited exceptions; and

analogous and similar state and foreign laws and regulations, such as, state anti-kickback and false claims laws potentially applicable to sales
or marketing arrangements and claims involving healthcare items or services reimbursed by non-governmental third-party payors, including
private insurers; and some state laws require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance
guidelines and the relevant compliance guidance promulgated by the federal government in addition to requiring drug manufacturers to report
information related to payments to physicians and other healthcare providers or marketing expenditures, and state and foreign 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.

Ensuring our future business arrangements with third parties comply with applicable healthcare laws and regulations could involve substantial costs.

If our operations are found to be in violation of any such requirements, we may be subject to penalties, including civil or criminal penalties, monetary
damages, the curtailment or restructuring of our operations, or exclusion from participation in government contracting, healthcare reimbursement, or other
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Medicare and Medicaid, any of which could adversely affect our financial results. Although effective compliance programs can mitigate the risk of
investigation and prosecution for violations of these laws, these risks cannot be entirely eliminated. Any action against us for an alleged or suspected
violation could cause our company to incur significant legal expenses and could divert our management’s attention from the operation of our business, even
if our defense is successful. In addition, achieving and sustaining compliance with applicable laws and regulations may be costly to us in terms of money,
time, and resources.

If we or our current or future collaborators, manufacturers, or service providers fail to comply with applicable federal, state, or foreign laws or
regulations, we could be subject to enforcement actions, which could affect our ability to develop, market, and sell our therapeutics successfully and could
harm our reputation and lead to reduced acceptance of our therapeutics by the market. These enforcement actions include, among others:

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adverse regulatory inspection findings;

warning or untitled letters;

voluntary product recalls with public notification or medical product safety alerts to healthcare professionals;

restrictions on, or prohibitions against, marketing our therapeutics;

restrictions on, or prohibitions against, importation or exportation of our therapeutics;

suspension of review or refusal to approve pending applications or supplements to approved applications;

exclusion from participation in government-funded healthcare programs;

exclusion from eligibility for the award of government contracts for our therapeutics;

FDA debarment;

suspension or withdrawal of therapeutic approvals;

seizures or administrative detention of therapeutics;

injunctions; and

restitution, disgorgement of profits, or civil and criminal penalties and fines.

Enacted and future legislation may increase the difficulty and cost for us to obtain marketing approval of our therapeutic candidates.

The policies of the FDA or similar regulatory authorities may change, and additional government regulations may be enacted that could prevent,
limit or delay regulatory approval of our product candidates. For example, in 2016, the 21st Century Cures Act, or Cures Act, was signed into law. The
Cures Act, among other things, is intended to modernize the regulation of drugs and biologics and spur innovation, but it is still being implemented and its
ultimate implementation is unclear. If we or our collaborators are slow or unable to adapt to changes in existing requirements or the adoption of new
requirements or policies, or if we or our collaborators are not able to maintain regulatory compliance, our therapeutic candidates may not obtain or maintain
regulatory approval, and we may not achieve or sustain profitability, which would adversely affect our business.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or executive or administrative

action, either in the United States or abroad. The FDA’s and other regulatory authorities’ policies may change, and additional government regulations may
be enacted that could prevent, limit or delay regulatory approval of our product candidates. 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. It is difficult to predict how current and future legislation, executive actions,
and litigation, including the executive orders, will be implemented, and the extent to which they will impact our business, our clinical development, and the
FDA’s and other agencies’ ability to exercise their regulatory authority, including FDA’s pre-approval inspections and timely review of any regulatory
filings or applications we submit to the FDA. To the extent any legislative or executive actions impose constraints on FDA’s ability to engage in oversight
and implementation activities in the normal course, our business may be negatively impacted.

Any therapeutics we develop may become subject to unfavorable pricing regulations, third-party coverage and reimbursement practices, or healthcare
reform initiatives, thereby harming our business.

The regulations governing marketing approvals, pricing, coverage, and reimbursement for new drugs and biologics vary widely from country to

country. Many countries require approval of the sale price of a drug before it can be marketed. In many

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countries, the pricing review period begins after marketing or product licensing approval is granted. In some foreign markets, prescription pharmaceutical
pricing remains subject to continuing governmental control even after initial approval is granted. Although we intend to monitor these regulations, our
programs are currently in the early stages of development and we will not be able to assess the impact of price regulations for a number of years. As a
result, we might obtain regulatory approval for a product in a particular country but then be subject to price regulations delaying our commercial launch of
the product and negatively impacting the revenues we are able to generate from the sale of the product in that country.

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

products and related treatments will be available from government health administration authorities, private health insurers, and other organizations.
However, there may be significant delays in obtaining coverage for newly-approved therapeutics. Moreover, eligibility for coverage does not necessarily
signify a therapeutic will be reimbursed in all cases or at a rate covering our costs, including research, development, manufacture, sale, and distribution
costs. Also, interim payments for new therapeutics, if applicable, may be insufficient to cover our costs and may not be made permanent. Thus, even if we
succeed in bringing one or more therapeutics to the market, these products may not be considered cost-effective, and the amount reimbursed for any of
them may be insufficient to allow us to sell them 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, coverage prospects, potential compendia listings, or the likely level or method of reimbursement, if covered. It is
equally difficult for us to predict how Medicare coverage and reimbursement policies will be applied to our products in the future, and coverage and
reimbursement under different federal healthcare programs are not always consistent. Medicare reimbursement rates may also reflect budgetary constraints
placed on the Medicare program.

Third-party payors often rely upon Medicare coverage policies and payment limitations in setting their own reimbursement rates. These coverage
policies and limitations may rely, in part, on compendia listings for approved therapeutics. Our inability to promptly obtain relevant compendia listings,
coverage, and adequate reimbursement from both government-funded and private payors for new therapeutics we develop and for which we obtain
regulatory approval could have a material adverse effect on our operating results, our ability to raise capital needed to commercialize products, and our
financial condition.

We believe the efforts of governments and third-party payors to contain or reduce the cost of healthcare, and legislative and regulatory proposals to

broaden the availability of healthcare, will continue to affect the business and financial condition of pharmaceutical and biopharmaceutical companies. A
number of legislative and regulatory changes in the healthcare system in the United States and other major healthcare markets have been proposed, and
such efforts have expanded substantially in recent years. These developments could, directly or indirectly, affect our ability to sell our products, if
approved, at a favorable price. In addition, third-party payors who reimburse patients or healthcare providers, such as government and private insurance
plans, are seeking greater upfront discounts, additional rebates, and other concessions to reduce the prices for therapeutics. If the price we are able to charge
for any therapeutics we develop, or the reimbursement provided for such products, is inadequate, our return on investment could be adversely affected.

Pursuant to health reform legislation and related initiatives, the Centers for Medicare and Medicaid Services, or CMS, are working with various

healthcare providers to develop, refine, and implement Accountable Care Organizations, or ACOs, and other innovative models of care for Medicare and
Medicaid beneficiaries, including the Bundled Payments for Care Improvement Initiative, the Comprehensive Primary Care Initiative, the Duals
Demonstration, and other models. The continued development and expansion of ACOs and other innovative models of care will have an uncertain impact
on any future reimbursement we may receive for approved therapeutics administered by such organizations.

In addition, in recent years, the U.S. Congress has enacted various laws seeking to reduce the federal debt level and contain healthcare expenditures.
For example, as a result of the Budget Control Act of 2011 and the Bipartisan Budget Act of 2015, an annual 2% reduction to Medicare payments that took
effect in 2013 and will remain in effect through 2031, with the exception of a temporary suspension implemented under various COVID-19 relief
legislation from May 1, 2020 through March 31, 2022, unless additional Congressional action is taken. Under current legislation, the actual reduction in
Medicare payments will vary from 1% in 2022 to up to 4% in the final fiscal year of this sequester. These across-the-board spending cuts could adversely
affect our future revenues, earnings, and cash flows.

There has been increasing legislative and enforcement interest in the United States with respect to specialty drug pricing practices. Specifically,

there have been several recent U.S. Congressional inquiries and proposed federal and state legislation designed to, among other things, bring more
transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the relationship between pricing and manufacturer patient
programs, and reform government program reimbursement methodologies for drugs. At the federal level, the Trump administration used several means to
propose or implement drug pricing reform, including through federal budget proposals, executive orders and policy initiatives. For example, in 2020, HHS
and CMS issued various rules that are expected to impact, among others, price reductions from pharmaceutical manufacturers to

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plan sponsors under Part D, fee arrangements between pharmacy benefit managers and manufacturers, manufacturer price reporting requirements under the
Medicaid Drug Rebate Program, including regulations that affect manufacturer-sponsored patient assistance programs subject to pharmacy benefit manager
accumulator programs and Best Price reporting related to certain value-based purchasing arrangements. Multiple lawsuits have been brought against the
HHS challenging various aspects of the rules implemented during the Trump administration. As a result, the Biden administration and HHS have delayed
the implementation or published rules rescinding some of these Trump-era policies.

Under the American Rescue Plan Act of 2021, effective January 1, 2024, the statutory cap on Medicaid Drug Rebate Program rebates that

manufacturers pay to state Medicaid programs will be eliminated. Elimination of this cap may require pharmaceutical manufacturers to pay more in rebates
than it receives on the sale of products, which could have a material impact on our business. In July 2021, the Biden administration released an executive
order, “Promoting Competition in the American Economy,” with multiple provisions aimed at increasing competition for prescription drugs. In response to
this executive order, the HHS released a Comprehensive Plan for Addressing High Drug Prices that outlines principles for drug pricing reform and potential
legislative policies that Congress could pursue to advance these principles. In addition, Congress is considering legislation that, if passed, could have
significant impact on prices of prescription drugs covered by Medicare, including limitations on drug price increases. The impact of these legislative,
executive, and administrative actions and any future healthcare measures and agency rules implemented by the Biden administration on us and the
pharmaceutical industry as a whole is unclear. Any reduction in reimbursement from Medicare or other government programs may result in a reduction in
payments from private payors. Additionally, a number of states are considering or have recently enacted state drug price transparency and reporting laws
that could substantially increase our compliance burdens and expose us to greater liability under such state laws once we begin commercialization after
obtaining regulatory approval for any of our products.

The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain
profitability or commercialize our product candidates. The impact of legislative, executive, and administrative actions of the Biden administration on us
and the biopharmaceutical industry as a whole is unclear. We expect that additional state and federal healthcare reform measures will be adopted in the
future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, which could result in reduced
demand for our product candidates or additional pricing pressures.

The healthcare industry is heavily regulated in the U.S. at the federal, state, and local levels and in other jurisdictions in which we may conduct trials
or other activities, and our failure to comply with applicable requirements may subject us to penalties and negatively affect our financial condition.

As a healthcare company, our operations, clinical trial activities, and interactions with healthcare providers will be subject to extensive regulation in

the United States, particularly if we receive FDA approval for any of our products in the future, and we may be subject to laws and regulations in other
jurisdictions as we conduct clinical trials or engage in other activities in foreign jurisdictions. For example, if we receive FDA approval for a therapeutic for
which reimbursement is available under a federal healthcare program, it would be subject to a variety of federal laws and regulations, including those
prohibiting the filing of false or improper claims for payment by federal healthcare programs, prohibiting unlawful inducements for the referral of business
reimbursable by federal healthcare programs, and requiring disclosure of certain payments and other transfers of value made to covered recipients in the
previous year, including U.S.-licensed physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors), certain non-physician
healthcare professionals (such as physician assistants and nurse practitioners, among others), and teaching hospitals, as well as information regarding
certain physicians’ and their immediate family members’ ownership and investment interests in the applicable manufacturer, with limited exceptions. If our
past or present operations, or those of our contractors or agents who conduct business on our behalf, are found to be in violation of any of these laws, we
could be subject to enforcement action, government investigation, civil and criminal penalties, which could hurt our business, operations, and financial
condition. It is not always possible to identify and deter misconduct by parties we may contract with, including employees, contractors, collaborators,
CROs, and suppliers, and the precautions we take to detect and prevent misconduct 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 comply with these 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 significant
impact on our business, including the imposition of significant penalties, including civil, criminal and administrative penalties, damages, fines,
disgorgement, imprisonment, exclusion from participation in government funded healthcare programs, such as Medicare and Medicaid, integrity oversight
and reporting obligations, contractual damages, reputational harm, diminished profits and future earnings and the curtailment or restructuring of our
operations

Similarly, some state laws prohibit, among other offenses, knowingly and willfully executing a scheme to defraud any health care benefit program,

including private payors, or falsifying, concealing, or covering up a material fact or making any

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materially false, fictitious, or fraudulent statement in connection with the delivery of or payment for items or services under a health care benefit program.
We may also be subject to the privacy and security provisions of HIPAA, as amended by HITECH, which restricts the use and disclosure of patient-
identifiable health information, mandates the adoption of standards relating to the privacy and security of patient-identifiable health information, and
requires the reporting of certain security breaches to healthcare provider customers with respect to such information. Additionally, many states have
enacted similar laws imposing more stringent requirements on entities like us. Failure to comply with applicable laws and regulations could result in
substantial penalties and adversely affect our financial condition and results of operations. Complying with new regulatory requirements and changes in the
laws and regulations will increase our compliance cost and exposure to potential liability.

Additionally, the collection and use of health data in the EU is governed by the General Data Protection Regulation, or GDPR, which extends the
geographical scope of EU data protection law to non-EU entities under certain conditions and imposes substantial obligations upon companies and new
rights for individuals. Further, state and foreign laws may apply generally to the privacy and security of information we maintain, and may differ from each
other in significant ways, thus complicating compliance efforts, as discussed in the risk factor below titled, “Data collection is governed by restrictive
regulations governing the use, processing and cross-border transfer of personal information.”

Data collection is governed by restrictive regulations governing the use, processing and cross-border transfer of personal information.

In conducting and/or enrolling patients in our current or future clinical trials, we are subject to restrictions relating to privacy, data protection and
data security and may be subject to additional restrictions as our clinical operations expand. For example, the collection, use, storage, disclosure, transfer,
or other processing of personal data regarding individuals in the European Union, or EU, including personal health data, is subject to the GDPR. The
GDPR is wide-ranging in scope and imposes numerous requirements on companies that process personal data, including requirements relating to
processing health and other sensitive data, obtaining consent of the individuals to whom the personal data relates, providing information to individuals
regarding data processing activities, implementing safeguards to protect the security and confidentiality of personal data, providing notification of data
breaches (initially to supervisory authorities and, if the breach is serious enough, to individuals), and taking certain measures when engaging third-party
processors. The GDPR also imposes strict rules on the transfer of personal data to countries outside the EU, including the United States, and permits data
protection authorities to impose large penalties for violations of the GDPR, including potential fines of up to €20 million or 4% of annual global revenues,
whichever is greater, for the most serious of violations. The GDPR also confers a private right of action on data subjects and consumer associations to
lodge complaints with supervisory authorities, seek judicial remedies, and obtain compensation for damages resulting from violations of the GDPR. In
addition, the GDPR includes restrictions on cross-border data transfers. Certain aspects of cross-border data transfers under the GDPR are uncertain as the
result of legal proceedings in the EU, including a July 2020 decision by the Court of Justice for the European Union, or CJEU, that invalidated the EU-U.S.
Privacy Shield and, to some extent, called into question the efficacy and legality of using standard contractual clauses (SCCs). To address certain concerns
of the CJEU, the European Commission issued revised SCCs in June 2021. Regulatory guidance and other developments relating to cross-border personal
data transfers, including the necessity of putting in place those revised SCCs and the UK SCCs, as discussed below, may increase the complexity of
transferring personal data across borders and may require us to engage in additional contractual negotiations and to modify our policies and practices
relating to the transfer and other processing of personal data. The GDPR increased our responsibility and liability in relation to personal data that we
process where such processing is subject to the GDPR, and we may be required to put in place additional mechanisms to ensure compliance with the
GDPR, including as implemented by individual countries.

Further, the vote in the United Kingdom, or UK, in favor of exiting the EU, referred to as Brexit, has created uncertainty with regard to data
protection regulation in the UK. The Data Protection Act of 2018, which “implements” and complements the GDPR, achieved Royal Assent on May 23,
2018 and is now effective in the UK along with a version of the GDPR referred to as the UK GDPR. Collectively, the Data Protection Act of 2018 and the
UK GDPR authorize significant fines, up to the greater of £17.5 million or 4% of global turnover, and expose us to two parallel regimes and other
potentially divergent enforcement actions for certain violations. Further, aspects of data protection in the UK remain uncertain. On June 28, 2021, the
European Commission issued an adequacy decision under the GDPR and the Law Enforcement Directive, pursuant to which personal data generally may
be transferred from the EU to the UK without restriction; however, this adequacy decision is subject to a four-year “sunset” period, after which the
European Commission’s adequacy decision may be renewed, and this decision may be revoked or modified in the interim. Additionally, on February 2,
2022, the UK’s Information Commissioner’s Office issued new standard contractual clauses to support personal data transfers out of the UK. If approved
by the UK Parliament, these standard contractual clauses become effective March 21, 2022, and we may, in addition to other impacts, experience additional
costs associated with increased compliance burdens and be required to engage in new contract negotiations with third parties that aid in processing personal
data on our behalf or localize certain personal data.

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Other jurisdictions also increasingly maintain laws and regulations addressing privacy, data protection, and information security. We may incur

liabilities, expenses, costs, and other operational losses under GDPR and local laws of applicable EU member states, the UK, and other regions in
connection with any measures we take to comply with them. Working to comply with the GDPR and other laws and regulations to which we are subject in
Europe and other regions outside the United States relating to privacy, data protection, and information security will be a rigorous and time-intensive
process that may increase our cost of doing business or require us to change our business practices, and despite those efforts, there is a risk that we may be
subject to fines and penalties, litigation, and reputational harm in connection with our activities in those regions.

In addition, in California, the CCPA creates new individual privacy rights for California consumers (as defined in the law) and places increased
privacy and security obligations on entities handling personal data of consumers or households. The CCPA requires covered companies to provide new
disclosure to consumers about such companies’ data collection, use and sharing practices, provide such consumers new ways to opt-out of certain sales or
transfers of personal information, and provide consumers with additional causes of action in data breach situations. While it exempts some data regulated
by HIPAA and certain clinical trials data, the CCPA, to the extent applicable to our business and operations, may increase our compliance costs and
potential liability with respect to other personal information we collect about California residents. The CCPA went into effect on January 1, 2020, and the
California Attorney General commenced enforcement actions for violations on July 1, 2020. Moreover, the CPRA was approved by California voters in the
November 3, 2020 election. The CPRA will significantly modify the CCPA, creating obligations beginning on January 1, 2022, with implementing
regulations expected on or before July 1, 2022, and enforcement commencing July 1, 2023. The CPRA creates further uncertainty and may require us to
incur additional costs and expenses. The CCPA and CPRA could mark the beginning of a trend toward more stringent privacy legislation in the United
States. The CCPA has prompted a number of proposals for federal and state privacy legislation. For example, in March 2021, Virginia enacted the Virginia
Consumer Data Protection Act (CDPA), a comprehensive privacy statute that becomes effective on January 1, 2023 and shares similarities with the CCPA.
In addition, on July 7, 2021, Colorado enacted the Colorado Privacy Act (CPA), becoming the third state to pass comprehensive consumer privacy
legislation in the United States. These and other new laws that may be proposed or enacted could increase our potential liability and adversely affect our
business.

Compliance with U.S. and international data protection laws and regulations could require us to take on more onerous obligations in our contracts,
restrict our ability to collect, use and disclose data, or in some cases, impact our ability to operate in certain jurisdictions. Any actual or alleged failure to
comply with U.S. or international laws and regulations relating to privacy, data protection, and data security could result in governmental investigations,
proceedings and enforcement actions (which could include civil or criminal penalties), private litigation or adverse publicity, harm to our reputation, and
could negatively affect our operating results and business. Moreover, clinical trial subjects about whom we or our potential collaborators obtain
information, as well as the providers who share this information with us, may contractually limit our ability to use and disclose the information or impose
other obligations or restrictions in connection with our use, retention and other processing of information, and we may otherwise face contractual
restrictions applicable to our use, retention, and other processing of information. Claims that we have violated individuals’ privacy rights, failed to comply
with data protection laws, 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.

Our ability to obtain services, reimbursement, or funding from the federal government may be impacted by possible reductions in federal spending.

The U.S. federal budget remains in flux and could, among other things, cut Medicare payments to providers. The Medicare program is frequently
mentioned as a target for spending cuts. The full impact on our business of any future cuts in Medicare or other programs is uncertain. We cannot predict
the extent of legislative, executive, and administrative actions of the Biden administration will have on us and the biopharmaceutical industry as a whole. If
federal spending is reduced, anticipated budgetary shortfalls may also impact the ability of relevant agencies such as the FDA or the National Institutes of
Health to continue to function at current levels. Amounts allocated to federal grants and contracts may be reduced or eliminated. These reductions may also
impact the ability of relevant agencies to timely review and approve drug research and development, manufacturing, and marketing activities, which may
delay our ability to develop, market, and sell any therapeutics we may develop.

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If any of our therapeutic candidates receives marketing approval and we or others later identify undesirable side effects caused by the therapeutic
product, our ability to market and derive revenue from the therapeutic products could be compromised.

In the event any of our therapeutic candidates receive regulatory approval and we or others identify undesirable side effects, adverse events, or other
problems caused by one of our therapeutics, any of the following adverse events could occur, which could result in the loss of significant revenue to us and
materially and adversely affect our results of operations and business:

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regulatory authorities may withdraw their approval of the product and require us to take the product off the market or seize the product;

we may need to recall the therapeutic or change the way the therapeutic is administered to patients;

additional restrictions may be imposed on the marketing and promotion of the particular therapeutic or the manufacturing processes for the
therapeutic or any component thereof;

we may not be able to secure or maintain adequate coverage and reimbursement for our proprietary therapeutic products from government
(including U.S. federal health care programs) and private payors;

we may lose or see adverse alterations to compendia listings or treatment protocols specified by accountable care organizations;

we may be subject to fines, restitution, or disgorgement of profits or revenues, injunctions, or the imposition of civil penalties or criminal
prosecution;

regulatory authorities may require the addition of labeling statements, such as a “black box” warning, or equivalent, or a contraindication;

regulatory authorities may require us to implement a REMS plan, or to conduct post-marketing studies or clinical trials and surveillance to
monitor the safety or efficacy of the product;

we may be required to create a Medication Guide outlining the risks of such side effects for distribution to patients;

we could be sued and held liable for harm caused to patients;

the therapeutic may become less competitive; and

our reputation may suffer.

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

The Patient Protection and Affordable Care Act, signed into law in 2010, 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 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 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. While
it is uncertain when such processes intended to implement BPCIA may be fully adopted by the FDA, any such processes could have a material adverse
effect on the future commercial prospects for our biological products.

We believe that any of our therapeutic 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 therapeutic
candidates to be reference products for competing products, potentially creating the opportunity for generic 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.

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Significant developments stemming from the United Kingdom’s recent withdrawal from the European Union could have a material adverse effect on
us.

The United Kingdom’s recent withdrawal from the European Union and ongoing negotiations related to the United Kingdom’s trade and other

relationships with the European Union continue to create political and economic uncertainty, particularly in the United Kingdom and the European Union.
Any business we conduct, now and in the future, in the United Kingdom, the European Union, and worldwide could be affected as a result of this transition
and there are multiple ways in which our business could be negatively affected.

Brexit is expected to disrupt the operation of pre- and post-authorization clinical trial infrastructure. As of January 1, 2021, European Union law

applies only to the territory of Northern Ireland to the extent foreseen in the Protocol on Ireland / Northern Ireland. The rules around GMP and
pharmacovigilance in the UK currently remain similar to the EU requirements. However, the Falsified Medicines Directive will not apply in Great Britain
though it is likely that the UK will implement a procedure to minimize the risk of falsified medicines. Uncertainty in the regulatory framework and future
legislation can lead to disruption in the execution of international multi-center clinical trials, the monitoring of adverse events in through
pharmacovigilance programs, and determination of marketing authorization across different jurisdictions. There could also be disruption to the supply and
distribution as well as the import/export both of active pharmaceutical ingredients and finished product. Such a disruption could create supply difficulties
for ongoing clinical trials and may damage the integrity of the pharmacovigilance database for the safety of new products. The cumulative effects of the
disruption to the regulatory framework, uncertainty in future regulation, and changes to existing regulations may add considerably to the development lead
time to marketing authorization and commercialization of products in the European Union and/or the United Kingdom and increase our costs. We cannot
predict the impact of such changes and future regulation on our business or the results of our operations. Exposure to different and changing regulations in
multiple foreign jurisdictions may increase our liabilities, expenses, costs, and other operational losses.

Risks Related to Ownership of Our Common Stock

Our stock price may be volatile, and an active, liquid, and orderly trading market may not develop for our common stock. As a result, stockholders may
not be able to resell shares at or above their purchase price.

Although our common stock is listed on Nasdaq, an active trading market for our common stock may not be sustained. The lack of an active market

may impair the ability of our stockholders to sell their shares at the time they wish to sell them or at a price that they consider reasonable, which may
reduce the fair market value of their shares. Further, an inactive market may also impair our ability to raise capital by selling our common stock should we
determine additional funding is required.

The market price of our common stock could be subject to significant fluctuations. Market prices for securities of early-stage pharmaceutical,

biotechnology, and other life sciences companies have historically been particularly volatile. Some of the factors that may cause the market price of our
common stock to fluctuate include:

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our and our collaborators’ ability to obtain regulatory approvals for product candidates, and delays or failures to obtain such approvals;

the failure of any of our product candidates, if approved, to achieve commercial success;

issues in manufacturing our approved products, if any, or product candidates;

the results of current, and any future, preclinical or clinical trials of our product candidates;

our ability to achieve development milestones and receive associated milestone payments pursuant to the terms of our collaboration
agreements;

the entry into, or termination of, key agreements, including key licensing, collaboration or acquisition agreements;

the initiation or material developments in, or conclusion of, litigation to enforce or defend any of our intellectual property rights or defend
against the intellectual property rights of others;

announcements by commercial partners or competitors of new commercial products, clinical progress (or the lack thereof), significant
contracts, commercial relationships, or capital commitments;

adverse publicity relating to our markets, including with respect to other products and potential products in such markets;

adverse publicity about our company, employees, therapeutic candidates, and/or therapeutic products in the media or on social media;

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the impact of COVID-19 on our company or the economy generally;

the introduction of technological innovations or new therapies competing with our potential products;

the loss of key employees;

changes in estimates or recommendations by securities analysts, if any, who cover our common stock;

general and industry-specific economic conditions potentially affecting our research and development expenditures;

changes in the structure of health care payment systems;

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

failure to meet or exceed financial and development projections we may provide to the public;

failure to meet or exceed the financial and development projections of the investment community;

the perception of the pharmaceutical industry by the public, legislators, regulators, and the investment community;

adverse regulatory decisions;

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

commencement of, or our involvement in, litigation;

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

trading volume of our common stock;

period-to-period fluctuations in our financial results; and

the other factors described in this “Risk Factors” section.

Moreover, the stock markets in general have experienced substantial volatility that has often been unrelated to the operating performance of

individual companies or the biotechnology sector. These broad market fluctuations may also adversely affect the trading price of our common stock.

In the past, following periods of volatility in the market price of a company’s securities, stockholders have often instituted class action securities

litigation against those companies. Such litigation, if instituted, could result in substantial costs and diversion of management attention and resources,
which could significantly harm our business and reputation.

Our officers and directors, and their respective affiliates, have a controlling influence over our business affairs and may make business decisions with
which stockholders disagree and which may adversely affect the value of their investment.

Our executive officers and directors together with their respective affiliates, beneficially own approximately 51% of our common stock as of

December 31, 2021. As a result, if some of these persons or entities act together, they will have the ability to exercise significant influence over matters
submitted to the stockholders for approval, including the election of directors, amendments to the certificate of incorporation and bylaws and the approval
of any strategic transaction requiring the approval of the stockholders. These actions may be taken even if they are opposed by other stockholders. This
concentration of ownership may also have the effect of delaying or preventing a change of control of our company or discouraging others from making
tender offers for our shares, which could prevent our stockholders from receiving a premium for their shares. Some of these persons or entities who make
up our principal stockholders may have interests different from other stockholders. The significant concentration of stock ownership may adversely affect
the trading price of our common stock due to investors’ perception that conflicts of interest may exist or arise.

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Future sales, or the perception of future sales, of a substantial amount of our common stock could depress the trading price of our common stock.

Our stock price could decline as a result of sales of a large number of shares of our common stock or the perception that these sales could occur.
These sales, or the possibility that these sales may occur, also might make it more difficult for us to sell equity securities in the future at a time and at a
price that we deem appropriate.

For example, in connection with our July 2020 private placement, we entered into a registration rights agreement with the private placement
investors that required us to prepare and file a resale registration statement, which was declared effective by the SEC on August 18, 2020 and permits the
resale by the private placement investors of approximately 5.1 million shares of our common stock as well as approximately 2.6 million shares of common
stock issuable upon the exercise of prefunded warrants and warrants issued in the July 2020 private placement. Additionally, in connection with our
September 2021 private placement, we entered into a registration rights agreement with the private placement investors that required us to prepare and file
a resale registration statement, which was declared effective by the SEC on November 19, 2021 and permits the resale by the private placement investors of
approximately 6.5 million shares of our common stock as well as approximately 3.2 million shares of common stock issuable upon the exercise of
prefunded warrants issued in the September 2021 private placement. We have in the past and may again in the future sell shares of our common stock to
strategic partners in connection with collaboration agreements, as we did in December 2021 in connection with our agreement with Horizon. The shares
subject to outstanding options and warrants, of which options and warrants (including prefunded warrants) to purchase 3.0 million shares and 8.8 million
shares, respectively, were exercisable as of December 31, 2021, and the shares reserved for future issuance under our equity incentive plans will become
available for sale immediately upon the exercise of such options.

We also register the offer and sale of all shares of common stock that we may issue under our equity incentive plans. Once we register the offer and

sale of shares for the holders of registration rights and option holders, they can be freely sold in the public market upon issuance, subject to any related
lock-up agreements or applicable securities laws.

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

connection with a financing, acquisition, litigation settlement, employee arrangements or otherwise. Any such future issuance, including any issuances
pursuant to our “at the market” equity offering program with Cowen, could result in substantial dilution to our existing stockholders and could cause our
stock price to decline.

We have broad discretion over the use of the proceeds to us from our financing activities and may apply the proceeds to uses that do not improve our
operating results or the value of your securities.

We have broad discretion over the use of proceeds to us from our financing activities and our stockholders rely solely on the judgment of our board
of directors and management regarding the application of these proceeds. Our use of proceeds may not improve our operating results or increase the value
of our common stock. Any failure to apply these proceeds effectively could have a material adverse effect on our business, delay the development of our
product candidates and cause the market price of our common stock to decline.

Anti-takeover provisions in our charter documents and under Delaware or Washington law could discourage, delay or prevent a change in control of
our company, limit attempts by our stockholders to replace or remove our current management and may affect the trading price of our common stock.

Our corporate documents contain provisions that may delay or discourage transactions involving an actual or potential change in our control or

change in our management, including transactions in which stockholders might otherwise receive a premium for their shares, or transactions that our
stockholders might otherwise deem to be in their best interests. Therefore, these provisions could adversely affect the price of our stock. Among other
things, our certificate of incorporation and bylaws:

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stagger the terms of our board of directors and require 66 and 2/3% stockholder voting to remove directors, who may only be removed for
cause;

provide that the authorized number of directors may be changed only by resolution of the board 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;

authorize our board of directors to issue “blank check” preferred stock and to determine the rights and preferences of those shares, which may
be senior to our common stock, without prior stockholder approval;

establish advance notice requirements for nominating directors and proposing matters to be voted on by stockholders at stockholders’
meetings;

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prohibit our stockholders from calling a special meeting and prohibit stockholders from acting by written consent;

require 66 and 2/3% stockholder voting to effect certain amendments to our certificate of incorporation and bylaws; and

prohibit cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates.

In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law,

or DGCL, which generally prohibits a Delaware corporation from engaging in any of a broad range of business combinations with any “interested”
stockholder for a period of three years following the date on which the stockholder became an “interested” stockholder. Likewise, because our principal
executive offices are located in Washington, the anti-takeover provisions of the Washington Business Corporation Act may apply to us under certain
circumstances now or in the future. These provisions prohibit a “target corporation” from engaging in any of a broad range of business combinations with
any stockholder constituting an “acquiring person” for a period of five years following the date on which the stockholder became an “acquiring person.”
These provisions could discourage, delay or prevent a transaction involving a change in control of our company. These provisions could also discourage
proxy contests and make it more difficult for stockholders to elect directors of their choosing and cause us to take other corporate actions our stockholders
desire.

Claims for indemnification by our directors and officers may reduce our available funds to satisfy successful third-party claims against us and may
reduce the amount of available cash.

Our amended and restated certificate of incorporation provides that we will indemnify our directors to the fullest extent permitted by Delaware law.

In addition, as permitted by Section 145 of the DGCL, our amended and restated bylaws and our indemnification agreements that we have entered

into with our directors and officers provide that:

• We will indemnify our directors and officers for serving us in those capacities or for serving other business enterprises at our request, to the
fullest extent permitted by Delaware law. Delaware law provides that a corporation may indemnify such person if such person acted in good
faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the corporation and, with respect to any
criminal proceeding, had no reasonable cause to believe such person’s conduct was unlawful.

• We may, in our discretion, indemnify other employees and agents in those circumstances where indemnification is permitted by applicable

law.

• We are required to advance expenses, as incurred, to our directors and officers in connection with defending a proceeding, except that such
directors or officers shall undertake to repay such advances if it is ultimately determined that such person is not entitled to indemnification.

• We will not be obligated pursuant to our amended and restated bylaws to indemnify any director or officer in connection with any proceeding

(or part thereof) initiated by such person unless the proceeding was authorized in the specific case by our board of directors or such
indemnification is required to be made pursuant to our amended and restated bylaws.

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The rights conferred in our amended and restated bylaws are not exclusive, and we are authorized to enter into indemnification agreements
with our directors, officers, employees and agents and to obtain insurance to indemnify such persons.

• We may not retroactively amend our amended and restated bylaw provisions to reduce our indemnification obligations to our directors or

officers.

As a result, if we are required to indemnify one or more of our directors or officers, it may reduce our available funds to satisfy successful third-

party claims against us, may reduce the amount of available cash and may have a material adverse effect on our business and financial condition.

Our amended and restated certificate of incorporation designates the Court of Chancery of the State of Delaware as the sole and exclusive forum for
certain types of actions and proceedings that may be initiated by our stockholders, which could limit

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our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, employees or agents.

Our amended and restated certificate of incorporation provides that, unless we consent in writing to an alternative forum, the Court of Chancery of

the State of Delaware will be the sole and exclusive forum for any derivative action or proceeding brought on our behalf, any action asserting a claim of
breach of a fiduciary duty owed by any of our directors, officers, employees or agents to us or our stockholders, any action asserting a claim arising
pursuant to any provision of the DGCL, our amended and restated certificate of incorporation or our amended and restated bylaws or any action asserting a
claim that is governed by the internal affairs doctrine, in each case subject to the Court of Chancery having personal jurisdiction over the indispensable
parties named as defendants therein and the claim not being one which is vested in the exclusive jurisdiction of a court or forum other than the Court of
Chancery or for which the Court of Chancery does not have subject matter jurisdiction. Any person purchasing or otherwise acquiring any interest in any
shares of our common stock shall be deemed to have notice of and to have consented to this provision of our amended and restated certificate of
incorporation. In addition, our amended and restated bylaws provide that the U.S. federal district courts will be the exclusive forum for resolving any
complaint asserting a cause of action arising under the Securities Act.

These choice of forum provision may limit our stockholders’ ability to bring a claim in a judicial forum that it finds favorable for disputes with us or

our directors, officers, employees or agents, which may discourage such lawsuits against us and our directors, officers, employees and agents even though
an action, if successful, might benefit our stockholders. Stockholders who do bring a claim in the Court of Chancery could face additional litigation costs in
pursuing any such claim, particularly if they do not reside in or near Delaware. The Court of Chancery may also reach different judgments or results than
would other courts, including courts where a stockholder considering an action may be located or would otherwise choose to bring the action, and such
judgments or results may be more favorable to us than to our stockholders. Alternatively, if a court were to find these choice of forum provisions in our
amended and restated certificate of incorporation and amended and restated bylaws inapplicable to, or unenforceable in respect of, one or more of the
specified types of actions or proceedings, we may incur additional costs associated with resolving such matters in other jurisdictions, which could have a
material adverse effect on our business, financial condition or results of operations.

We do not expect to pay any dividends on our common stock for the foreseeable future.

We currently expect to retain all future earnings, if any, for future operations and expansion, and have no current plans to pay any cash dividends to
holders of our common stock for the foreseeable future. Any decision to declare and pay dividends in the future will be made at the discretion of our board
of directors and will depend on, among other things, our results of operations, financial condition, cash requirements, contractual restrictions and other
factors that our board of directors may deem relevant. As a result, stockholders may not receive any return on an investment in our common stock unless
stockholders sell our common stock for a price greater than that which they paid for it.

Nasdaq may delist our common stock from its exchange, which could limit investors’ ability to make transactions in our securities and subject us to
additional trading restrictions.

Our common shares are listed on Nasdaq under the trading symbol “ALPN.” Our securities may fail to meet the continued listing requirements to be

listed on Nasdaq. If Nasdaq delists our common shares from trading on its exchange, we could face significant material adverse consequences, including:

•

•

•

•

•

significant impairment of the liquidity for our common stock, which may substantially decrease the market price of our common stock;

a limited availability of market quotations for our securities;

a determination that our common stock qualifies as a “penny stock” which will require brokers trading in our common stock to adhere to more
stringent rules and possibly resulting in a reduced level of trading activity in the secondary trading market for our common stock;

a limited amount of news and analyst coverage for our company; and

a decreased ability to issue additional securities or obtain additional financing in the future.

78

Risks Related to Our Financial Reporting and Disclosure

We are a smaller reporting company, and any decision on our part to comply only with reduced reporting and disclosure requirements applicable to
such companies could make our common stock less attractive to investors.

We are a “smaller reporting company,” as defined in the Securities Exchange Act of 1934, as amended, or the Exchange Act. For as long as we

continue to be a smaller reporting company, we may choose to take advantage of exemptions from various reporting requirements applicable to other public
companies that are not smaller reporting companies, including, but not limited to, reduced disclosure obligations regarding executive compensation in our
periodic reports and proxy statements.

We will remain a smaller reporting company so long as, as of June 30 of the preceding year, (i) the market value of our common shares held by non-

affiliates, or our public float, is less than $250 million; or (ii) we have annual revenues less than $100 million and either we have no public float or our
public float is less than $700 million.

If we take advantage of some or all of the reduced disclosure requirements available to smaller reporting companies, investors may find our
common stock less attractive, which may result in a less active trading market for our common stock and greater stock price volatility. For so long as we
are a smaller reporting company and not classified as an “accelerated filer” or “large accelerated filer” pursuant to SEC rules, we will continue to be
exempt from the auditor attestation requirements of Section 404(b) of Sarbanes-Oxley.

If we fail to maintain proper and effective internal controls, our ability to produce accurate financial statements on a timely basis could be impaired.

We are subject to the reporting requirements of the Exchange Act, the Sarbanes-Oxley Act and the rules and regulations of The Nasdaq Stock
Market LLC. The Sarbanes-Oxley Act requires, among other things, that we maintain effective disclosure controls and procedures and internal control over
financial reporting. We must perform system and process evaluation and testing of our internal control over financial reporting to allow management to
report on the effectiveness of our internal controls over financial reporting in our Annual Report on Form 10-K filing for that year, as required by Section
404 of the Sarbanes-Oxley Act.

We may discover weaknesses in our system of internal financial and accounting controls and procedures that could result in a material misstatement

of our financial statements. Our internal control over financial reporting will not prevent or detect all errors and all fraud. An internal control system, no
matter how well designed and operated, can provide only reasonable, not absolute, assurance that the internal control system’s objectives will be met.
Because of the inherent limitations in all internal control systems, no evaluation of internal controls can provide absolute assurance that misstatements due
to error or fraud will not occur or that all internal control issues and instances of fraud will be detected.

If we are not able to comply with the requirements of Section 404 of the Sarbanes-Oxley Act, or if we are unable to maintain proper and effective

internal controls, we may not be able to produce timely and accurate financial statements. If that were to happen, the market price of our common stock
could decline and we could be subject to sanctions or investigations by The Nasdaq Stock Market LLC, the SEC, or other regulatory authorities.

Our disclosure controls and procedures may not prevent or detect all errors or acts of fraud.

Our disclosure controls and procedures are designed to reasonably ensure that information required to be disclosed by us in reports we file or

submits under the Exchange Act is accumulated and communicated to management and recorded, processed, summarized and reported within the time
periods specified in the rules and forms of the SEC. We believe that any disclosure controls and procedures as well as internal controls and procedures, no
matter how well-conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are and will be met.
These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or
mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by an unauthorized
override of the controls. Accordingly, because of the inherent limitations in our control system, misstatements due to error or fraud may occur and not be
detected.

We will continue to incur costs and demands upon management as a result of complying with the laws and regulations affecting public companies.

79

We will incur significant legal, accounting, and other expenses associated with public company reporting requirements. We will also incur costs

associated with corporate governance requirements, including requirements under the Sarbanes-Oxley Act, as well as new rules implemented by the SEC
and The Nasdaq Stock Market LLC. Although our status as a smaller reporting company may for a limited period of time somewhat lessen the cost of
complying with these additional regulatory and other requirements, we nonetheless expect that these rules and regulations will increase our legal and
financial compliance costs and to make some activities more time-consuming and costlier. Our executive officers and other personnel will need to devote
substantial time to oversee our operations as a public company and compliance with applicable laws and regulations. These rules and regulations may also
make it difficult and expensive for us to obtain directors and officer’s liability insurance. As a result, it may be more difficult for us to attract and retain
qualified individuals to serve on our board of directors or as executive officers of our company, which may adversely affect investor confidence in us and
could cause our business or stock price to suffer.

General Risk Factors

Changes in accounting rules and regulations, or interpretations thereof, could result in unfavorable accounting charges or require us to change our
compensation policies.

Accounting methods and policies for biopharmaceutical companies, including policies governing revenue recognition, research and development

and related expenses, and accounting for stock-based compensation, are subject to review, interpretation, and guidance from our auditors and relevant
accounting authorities, including the SEC. Changes to accounting methods or policies, or interpretations thereof, may require us to reclassify, restate, or
otherwise change or revise our financial statements.

If equity research analysts do not publish research or reports, or publish unfavorable research or reports, about us, our business or our market, our
stock price and trading volume could decline.

The trading market for our common stock will be influenced by the research and reports that equity research analysts publish about us and our

business. Equity research analysts may elect not to provide research coverage of our common stock or discontinue existing research coverage, and such
lack of research coverage may adversely affect the market price of our common stock. We do not have any control over the analysts, or the content and
opinions included in their reports. The price of our common stock could decline if one or more equity research analysts downgrade our stock or issue other
unfavorable commentary or research. If one or more equity research analysts ceases coverage of us or fails to publish reports regularly, demand for our
common stock could decrease, which in turn could cause our stock price or trading volume to decline.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

In March 2019, we entered into a lease for 27,164 square feet of office and laboratory space located at 188 East Blaine Street, Seattle, Washington.
The term of the lease is 10.8 years with one option to extend the term by 5.0 years. The lease term commenced in June 2019. We believe that our existing
facility is adequate for our current needs as the facility has sufficient space to house additional personnel as we expand.

Item 3. Legal Proceedings.

We are not engaged in any material legal proceedings. From time to time, we may become involved in litigation relating to claims arising from the

ordinary course of business. We believe that there are no claims or actions pending against us currently, the ultimate disposition of which would have a
material adverse effect on our consolidated results of operation, financial condition or cash flows.

Item 4. Mine Safety Disclosures.

Not applicable.

80

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

PART II

Market Information

From June 17, 2015 through July 24, 2017, our common stock was traded under the symbol “NVLS.” On July 24, 2017, in connection with the
business combination of Nivalis Therapeutics, Inc. and Alpine Immune Sciences, Inc., we completed a 1-for-4 reverse stock split. Commencing on July 25,
2017, our common stock began trading on The Nasdaq Global Market under the symbol “ALPN.” As of March 7, 2022, we have approximately 26
stockholders of record for our common stock, which excludes stockholders whose shares were held in nominee or street name accounts through brokers.

Dividends

We have never declared or paid cash dividends on our capital stock. We currently intend to retain any future earnings for use in the operation of our

business and do not intend to declare or pay any cash dividends in the foreseeable future. Any further determination to pay dividends on our capital stock
will be at the discretion of our board of directors, subject to applicable laws, and will depend on our financial condition, results of operations, capital
requirements, general business conditions and other factors that our board of directors considers relevant.

Stock Performance Graph

As a “smaller reporting company,” as defined by Rule 12b-2 of the Exchange Act, and pursuant to Instruction 6 to Item 201(e) of Regulation S-K

we are not required to provide the stock performance graph.

Item 6. [Reserved]

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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 consolidated financial
statements and the related notes appearing elsewhere in this Annual Report on Form 10-K. In addition to historical information, some of the information
contained in this discussion and analysis or set forth elsewhere in this report, including information with respect to our plans and strategy for our business,
future financial performance, expense levels and liquidity sources, includes forward-looking statements that involve risks and uncertainties. You should
read Risk Factors in Part I, Item 1A of this report for a discussion of important factors that could cause actual results to differ materially from the results
described in or implied by the forward-looking statements contained in the following discussion and analysis.

Overview

We are a clinical-stage biopharmaceutical company dedicated to discovering and developing innovative, protein-based immunotherapies to treat

cancer and autoimmune and inflammatory diseases. Our approach includes a proprietary scientific platform that converts native immune system proteins
into differentiated, multi-targeted therapeutics. We believe our strategies are capable of meaningfully modulating the human immune system and
significantly improving outcomes in patients with serious diseases.

Autoimmune/Inflammatory Diseases

Acazicolcept, is a dual ICOS and CD28 antagonist intended for the treatment of autoimmune and inflammatory diseases. Preclinical studies with

acazicolcept have demonstrated efficacy in models of SLE, SjS, arthritis, inflammatory bowel disease, multiple sclerosis, type 1 diabetes, uveitis, and graft
versus host disease. We have evaluated acazicolcept in a Phase 1 healthy volunteer study and initiated patient dosing in Synergy, a global, randomized,
double-blind, placebo-controlled Phase 2 study of acazicolcept in adults with moderate-to-severe SLE. In June 2020, we entered into an Option and License
Agreement with AbbVie Ireland Unlimited Company, or AbbVie, which grants AbbVie an exclusive option to take an exclusive license to acazicolcept.
Through December 31, 2021, we have received $105.0 million in upfront and pre-option exercise development milestones as part of the AbbVie
Agreement.

ALPN-303 is a dual B cell cytokine antagonist, being developed for the treatment of B cell mediated inflammatory and autoimmune diseases.

Engineered using our proprietary directed evolution platform, ALPN-303 potently inhibits BAFF, BLyS and APRIL, which play key roles in B cell
development, differentiation, and survival, and together contribute to the pathogenesis of multiple autoimmune diseases such as SLE and many other
autoantibody-related inflammatory diseases. Data presented at the ACR Convergence 2021 Annual Meeting demonstrated that ALPN-303 inhibits the
activity of the B cell cytokines APRIL and BAFF more potently than wild-type TACI-Fc counterparts, as well as anti-BAFF and anti-APRIL monoclonal
antibodies. In addition, ALPN-303 has been well-tolerated in preclinical models and exhibited superior pharmacokinetics and pharmacodynamics over
wild-type TACI-Fc counterparts, including superior serum exposure, suppression of T-dependent antibody production, and/or serum immunoglobulins in
mice and/or cynomolgus monkeys. A first-in-human, Phase 1 study of ALPN-303 in healthy volunteers began in the fourth quarter of 2021, with top-line
results targeted by mid-2022. This randomized, placebo-controlled study is designed to evaluate the safety, tolerability, pharmacokinetics, and
pharmacodynamics of ALPN-303 administered intravenously and subcutaneously. We are planning to initiate patient-based studies in the second half of
2022 including SLE, and possibly other autoantibody-related diseases in other therapeutic areas.

In December 2021, we entered into the Horizon Agreement which grants Horizon an exclusive license for the development, manufacture and
commercialization of one Existing Program and up to three additional Research Programs generated from our libraries of proteins and molecules for
research, discovery and identification of additional compounds. Under the terms of the agreement, Horizon made an upfront payment to us of $25.0 million
as well as an equity investment for which they paid $15.0 million, a 25 percent premium to the 30-day volume-weighted average share price as of
December 9, 2021. In addition, we are eligible to receive up to $381.0 million per program, or approximately $1.5 billion in total, in future success-based
payments related to development, regulatory and commercial milestones as well as tiered royalties on global net sales.

Immuno-oncology

Our lead oncology program is davoceticept, a conditional CD28 costimulator and dual checkpoint inhibitor intended for the treatment of cancer.
Preclinical in vivo data have demonstrated monotherapy efficacy in tumor models superior to approved therapies. In June 2020, we initiated NEON-1, a
Phase 1 monotherapy dose escalation and expansion study in patients with advanced malignancies. Initial data from NEON-1 were presented at the 2021
ASCO Virtual Meeting demonstrating that davoceticept was well-tolerated as of the cutoff date (April 22, 2021) with evidence of peripheral T cell
modulation consistent with CD28 agonism. In addition, although most enrolled participants had tumors considered classically non-responsive to

82

immunotherapies, 61% (14 of 23 evaluable) derived clinical benefit as defined as a best outcome of stable disease or better. Completion of dose escalation
for NEON-1 and initiation of expansion cohorts is anticipated in the first half of 2022.

In June 2021, we announced a collaboration and supply agreement with Merck to evaluate the safety and efficacy of davoceticept in combination

with Merck’s anti-PD-1 therapy KEYTRUDA (pembrolizumab) in a Phase 1 dose escalation and expansion study. The clinical trial, NEON-2, was initiated
in June 2021. As discussed above, on March 7, 2022, we announced that the FDA placed a partial clinical hold on the NEON-2 trial in response to the
death of a study participant in the NEON-2 trial. The participant’s death was attributed to cardiogenic shock, considered by the treating physicians as likely
related to immune-mediated myocarditis, or possibly infection. Participants who are currently enrolled in the NEON-2 trial may continue to receive
davoceticept and pembrolizumab, although no new participants may be enrolled until the partial clinical hold is resolved. This partial clinical hold does not
affect the ongoing NEON-1 clinical trial of davoceticept as monotherapy (NCT04186637).

Our scientific platform has also generated immune modulatory proteins with the potential of improving engineered cell therapies, such as CAR-T,

TCR-T, and TILs. In May 2019, we signed a collaboration and license agreement with Adaptimmune to develop next-generation SPEAR  T cell products
which incorporate our secreted and transmembrane immunomodulatory protein (termed SIP™ and TIP™) technology. We intend to continue to leverage
our existing pipeline and platform to actively explore and evaluate potential value-creating partnering opportunities.

TM

Our goal is to discover and develop modern therapies to treat patients with serious conditions such as cancer and autoimmune/inflammatory

diseases. To achieve our goals, we intend to:

•

•

•

•

aggressively move our lead autoimmune/inflammatory program acazicolcept through clinical development as part of the AbbVie Agreement,
including conducting Synergy, our Phase 2 study for the treatment of SLE;

aggressively move our second autoimmune/inflammatory program ALPN-303 through a Phase 1 study in healthy volunteers and into clinical
studies for the treatment of B cell mediated autoimmune/inflammatory diseases;

aggressively move our lead oncology program davoceticept through clinical development for the treatment of cancer; and

maximize the value of our pipeline and platform via potential partnering activities.

Our operations to date have been limited to business planning, raising capital, developing our platform technology, identifying potential

immunotherapy candidates, clinical studies, and other research and development activities. To date, we have financed operations primarily through private
placements of common stock and convertible preferred stock, funds received from license and research agreements, debt financing and assets acquired
upon the close of our merger with Nivalis Therapeutics Inc., or Nivalis. We do not have any products approved for sale and have not generated any product
sales. Since inception and through December 31, 2021, excluding amounts borrowed through debt financing, we have raised an aggregate of $393.1 million
to fund operations, of which $170.6 million was from the sale of common stock and warrants, $49.2 million was from the sale of convertible preferred
stock, $129.2 million was through our license and collaboration agreements, and $44.1 million in cash, cash equivalents, and marketable securities acquired
through the merger with Nivalis. As of December 31, 2021, we had cash, cash equivalents, restricted cash, and investments totaling $215.4 million.

Our net loss was $50.3 million, $27.9 million, and $41.9 million for the years ended December 31, 2021, 2020, and 2019, respectively. We expect to

continue incurring significant expenses and operating losses for at least the next several years as we:

•

•

•

•

•

•

initiate and complete nonclinical studies and clinical trials for our product candidates, including acazicolcept, a dual ICOS/CD28 antagonist
program targeting autoimmune/inflammatory disorders, davoceticept, a conditional CD28 costimulator and dual checkpoint inhibitor intended
for the treatment of cancer, and ALPN-303, a dual B cell cytokine antagonist for B cell-mediated autoimmune/inflammatory diseases;

contract to manufacture and perform additional process development for our product candidates;

continue research and development efforts to build our pipeline beyond the current product candidates;

maintain, expand, and protect our intellectual property portfolio;

hire additional clinical, quality control, scientific, and management personnel; and

add operational and financial personnel to support our product development efforts and operational capabilities applicable to operating as a
public company.

83

We do not expect to generate product revenue unless and until we successfully complete development of, obtain marketing approval for and

commercialize our product candidates, either alone or in collaboration with third parties. We expect these activities will take a number of years and our
success in these efforts is subject to significant uncertainty. Accordingly, we will need to raise additional capital prior to the regulatory approval and
commercialization of any of our product candidates. Until such time, if ever, as we can generate substantial product revenues, we expect to finance our
operating activities through equity or debt financings, collaborations or licenses, capital lease transactions, or other available financing transactions.
However, additional capital may not be available on reasonable terms, if at all, and if we raise additional funds through the issuance of additional equity or
debt securities, it could result in dilution to our existing stockholders and increased fixed payment obligations.

Financial Overview

Collaboration Revenue

We derive our collaboration revenue primarily from our collaboration and licensing agreements. We may generate revenue in the future from
milestone payments received pursuant to our collaboration and licensing agreements with AbbVie, Horizon, Adaptimmune, or from payments from future
license or collaboration agreements, product sales, or government contracts and grants. We expect revenue we generate, if any, will fluctuate from quarter
to quarter.

Horizon

In December 2021, we entered into the Horizon Agreement which grants Horizon an exclusive license for the development, manufacture and
commercialization of one Existing Program and up to three additional Research Programs generated from our libraries of proteins and molecules for
research, discovery and identification of additional compounds.

Under the terms of the agreement, Horizon made an upfront payment to us of $25.0 million as well as an equity investment for which they paid

$15.0 million, a 25 percent premium to the 30-day volume-weighted average share price as of December 9, 2021. In addition, we are eligible to receive up
to $381.0 million per program, or approximately $1.5 billion in total, in future success-based payments related to development, regulatory and commercial
milestones as well as tiered royalties on global net sales. We will conduct our activities under the Existing Program and up to three Research Programs to
deliver compounds meeting agreed criteria. In addition, Horizon will pay us for the costs and expenses of conducting such activities under the deliverables
plans. Horizon will then assume responsibility for development and commercialization activities and costs.

For revenue recognition purposes, we determined that the Existing Program and each Research Program are distinct performance obligations. We

allocated revenue to each performance obligation based on its relative stand-alone selling price. The future success-based payments related to development
and regulatory milestones are probable of significant revenue reversal as the achievement is highly dependent on factors outside our control. Therefore,
these milestone payments are fully constrained and are not initially included in the transaction price. We will continue to re-evaluate the transaction price
each reporting period and update as uncertain events are resolved or other changes in circumstances occur. Any consideration related to commercial
milestones and royalties will be recognized when the related sales occur.

AbbVie

In June 2020, we entered into the AbbVie Agreement for the development of acazicolcept. The AbbVie Agreement grants AbbVie the exclusive
option to purchase an exclusive worldwide license to acazicolcept, or the License Option. The License Option is exercisable by AbbVie at any time and
will expire 90 days from the achievement of certain development milestones. If AbbVie exercises the License Option, AbbVie will take over the future
development and commercialization. Prior to the exercise of the License Option, we will perform research and development services, including conducting
our Phase 2 study in SLE, based on an agreed-upon development plan, or the Development Plan. We will be fully responsible for all costs incurred to
conduct the activities under the Development Plan, provided that, AbbVie may be responsible for increased costs under the Development Plan in
connection with certain material amendments proposed by AbbVie. We will also be solely responsible, at our sole cost and expense, for manufacturing and
regulatory filings for acazicolcept necessary to complete activities under the Development Plan.

In June 2020, in connection with the execution of the AbbVie Agreement, AbbVie paid us a nonrefundable upfront payment of $60.0 million. Prior

to the exercise of the License Option, AbbVie has agreed to make cash payments upon our achievement of certain predefined pre-option development
milestones, or the Alpine Development Milestones, up to an aggregate amount of $75.0 million. In the second quarter of 2021, we achieved $45.0 million
of the Alpine Development Milestones. If AbbVie exercises the License Option, they will pay a one-time cash payment of $75.0 million. Following the
exercise of the License Option, AbbVie has also agreed to make aggregate cash payments of up to $205.0 million upon

84

AbbVie’s achievement of certain development and commercial milestones and additional aggregate cash payments of up to $450.0 million upon AbbVie’s
achievement of certain sales-based cash milestones, collectively referred to as the AbbVie Milestones. Subsequent to commercialization, we are also
eligible to receive high single-digit to low double-digit percentage royalties on worldwide net sales of licensed products.

For revenue recognition purposes, we determined that our contractual promises in the AbbVie Agreement are not distinct and are interdependent
with our performance obligation to provide research and development services under the Development Plan. Thus, all contractual promises related to the
upfront payment and Alpine’s Development Milestones were combined into a single performance obligation. We determined the Alpine Development
Milestone payments are probable of significant revenue reversal as the achievement is highly dependent on factors outside our control. Therefore, these
milestone payments were fully constrained and were not initially included in the transaction price. In June 2021, we re-evaluated and updated the
transaction price to include the achieved portion of the Alpine Development Milestones. We will continue to re-evaluate the transaction price each
reporting period and update as uncertain events are resolved or other changes in circumstances occur.

The License Option and the AbbVie Milestones were not determined to be performance obligations at the inception of the contract as they did not

represent material rights. If exercised, the License Option and AbbVie Milestones will be accounted for as a separate contract and will be recognized as
revenue if and when triggered. Any consideration related to sales-based royalties and profit-sharing payments will be recognized when the related sales
occur.

We use a cost-based input method to measure progress toward completion of the performance obligation and to calculate the corresponding revenue
to recognize each period. In applying the cost-based input, we use actual costs incurred relative to budgeted costs for the combined performance obligation.
These costs consist primarily of internal personnel efforts and third-party contract costs relative to the level of patient enrollment in the study. Revenue will
be recognized based on the level of costs incurred relative to the total budgeted costs for the performance obligation. A cost-based input method of revenue
recognition requires management to make estimates of costs to complete our performance obligation. In making such estimates, significant judgment is
required to evaluate assumptions related to cost estimates. The cumulative effect of revisions to estimated costs to complete our performance obligation
will be recorded in the period in which changes are identified and amounts can be reasonably estimated. A significant change in these assumptions and
estimates could have a material impact on the timing and amount of revenue recognized in future periods.

We recognized revenue from the AbbVie Agreement of $23.4 million and $7.0 million for the years ended December 31, 2021 and 2020,
respectively. As of December 31, 2021 the remaining balance of the transaction price is $74.5 million and is recorded as current and noncurrent deferred
revenue on our accompanying Consolidated Balance Sheets. We expect to recognize the remaining deferred revenue over the remainder of our
Development Plan, which began in June 2020 and will end upon the later of the exercise or expiration of the option.

Adaptimmune

In May 2019, we entered into the Adaptimmune Agreement with Adaptimmune, a clinical-stage biopharmaceutical company primarily focused on

providing novel cell therapies to patients, particularly for the treatment of solid tumors, to develop next-generation SPEAR T cell products which
incorporate our SIP and TIP technologies. Under the Adaptimmune Agreement, we are to perform certain research services and grant Adaptimmune an
exclusive license to programs from our SIP and TIP technologies. In June 2019, under the terms of the Adaptimmune Agreement, we received an upfront
license payment of $2.0 million and through December 31, 2021 we have received an additional $1.6 million in research support payments to fund ongoing
programs. These payments were recorded to deferred revenue upon receipt and were recognized as revenue based on employee hours contributed to each
performance obligation. In the fourth quarter of 2020, based on the completion of our initial research and development efforts in connection with our
performance obligations, we recognized the remaining balance in deferred revenue associated with Adaptimmune on our accompanying Consolidated
Balance Sheets. Under the Adaptimmune Agreement, we recognized no revenue for the year ended December 31, 2021, and $2.3 million and $1.3 million
for the years ended December 31, 2020 and 2019, respectively. In addition, we are eligible for additional research support payments, one-time payments
and downstream development and commercialization milestones of up to $288.0 million, if all pre-specified milestones for each program are achieved. We
are also eligible to receive low-single digit percentage royalties on worldwide net sales of the applicable products. In February 2022, Adaptimmune
selected an additional research program, triggering a $1.0 million upfront payment, which will be recorded as deferred revenue upon receipt and recognized
to revenue based on employee hours contributed.

85

Research and Development Expenses

We focus our resources on research and development activities, including the conduct of preclinical studies, product development, regulatory

support, and clinical trials for our product candidates. We recognize research and development expenses as they are incurred. Our research and
development expenses consist of:

•

•

•

•

•

employee-related expenses, including salaries, benefits, taxes, travel, and stock-based compensation expense for personnel in research and
development functions;

expenses related to process development and production of product candidates paid to contract manufacturing organizations;

costs associated with preclinical activities and regulatory operations, including the cost of acquiring, developing, and manufacturing research
material;

clinical trials and activities related to regulatory filings for our product candidates; and

allocation of facilities, overhead, depreciation, and amortization of laboratory equipment and other expenses.

The table below summarizes our research and development expenses for the periods indicated. Our direct research and development expenses
consist primarily of expenses incurred pursuant to agreements with third-party manufacturing organizations for our product candidates, CROs, clinical trial
sites, collaborators, and consultants. Other direct costs included direct research and development costs incurred before a selected product candidate begins
clinical trials.

We use our employee and infrastructure resources across multiple research and development programs that we are advancing in parallel, and
therefore do not allocate salaries, stock-based compensation, employee benefit expenses or other indirect costs related to our research and development to
specific product candidates. These expenses are included in indirect research and development expense by type in the table below.

Our research and development expenses are summarized as follows (in thousands): 

Direct research and development expense by program:

Acazicolcept (ALPN-101)
Davoceticept (ALPN-202)
ALPN-303
Other

Total direct research and development expense by program

Indirect research and development expense by type:

Personnel-related costs
Research and development supplies and services
Allocated facility, equipment and other expenses

Total indirect research and development expense

Total research and development expense

2021

Years Ended December 31,
2020

2019

$

$

10,923 
10,640 
13,311 
515 
35,389 

17,456 
2,833 
3,064 
23,353 
58,742 

$

$

4,814 
4,697 
1,047 
62 
10,620 

11,697 
2,042 
2,826 
16,565 
27,185 

$

$

10,583 
8,393 
31 
236 
19,243 

11,169 
2,589 
2,846 
16,604 
35,847 

We expect our research and development expenses to increase for the foreseeable future as we continue to develop our platform and product

candidates.

The successful development of our platform and product candidates is highly uncertain. At this time, we cannot reasonably estimate the nature,

timing, or costs of the efforts necessary to finish developing any of our product candidates or the period in which material net cash, if any, from these
product candidates may commence. This is due to the numerous risks and uncertainties associated with developing therapeutics, including the uncertainty
of:

•

•

•

•

the scope, rate of progress, expense, and results of clinical trials;

the scope, rate of progress, and expense of process development and manufacturing;

preclinical and other research activities; and

the timing of regulatory approvals.

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General and Administrative Expenses

General and administrative expenses consist primarily of salaries and related costs for employees in executive, business development, finance, and

administrative functions. Other significant general and administrative expenses include professional fees for accounting and legal services, expenses
associated with obtaining and maintaining patents and other intellectual property, and allocation of facility and overhead costs.

We expect general and administrative expenses to increase as we expand infrastructure, headcount, and continue to prosecute our patents and other

intellectual property. Other increases could potentially include increased costs for insurance, costs related to the hiring of additional personnel, and
increased fees for directors, outside consultants, lawyers, and accountants. We expect to incur significant costs to comply with corporate governance,
internal controls, and similar requirements applicable to public companies.

Interest Expense

Interest expense consists primarily of interest associated with our term loan with Silicon Valley Bank, or SVB, and the amortization of the related

debt discount.

Interest Income

Interest income consists of interest earned on our cash, cash equivalents, and investments.

Other (Expense) Income

For the years ended December 31, 2020 and 2019, other (expense) income consists primarily of research and development tax credits received by

our wholly-owned Australian subsidiary and an employee retention tax credit related to COVID-19 relief legislation. Other (expense) income was
immaterial for the year ended December 31, 2021.

Results of Operations

Comparison of Years Ended December 31, 2021 and 2020

The following table summarizes our results of operations for the years ended December 31, 2021 and 2020 (in thousands): 

Collaboration revenue
Operating expenses:

Research and development
General and administrative
Total operating expenses

Loss from operations
Other income (expense):

Interest expense
Interest income
Other (expense) income

Loss before taxes
Income tax (expense) benefit

Net loss

 Collaboration Revenue

Years Ended December 31,

2021

2020

Change

$

23,443  $

9,335  $

14,108 

58,742 
14,560 
73,302 
(49,859)

(816)
259 
(4)
(50,420)
87 
(50,333) $

27,185 
10,899 
38,084 
(28,749)

(775)
245 
1,333 
(27,946)
6 

(27,940) $

31,557 
3,661 
35,218 
(21,110)

(41)
14 
(1,337)
(22,474)
81 
(22,393)

$

Revenue for the year ended December 31, 2021 consists of $23.4 million recognized under the AbbVie Agreement, an increase from prior year as

we execute on our AbbVie Development Plan. Revenue for the year ended December 31, 2020 consists of $7.0 million recognized under the AbbVie
Agreement and $2.3 million recognized under the Adaptimmune Agreement.

87

 
 
Research and Development Expenses

The $31.6 million increase in research and development expenses was primarily attributable to increases of $10.8 million in clinical trial activity

primarily related to our Synergy and NEON studies, $10.0 million in contract manufacturing and process development of our product candidates primarily
for acazicolcept and ALPN-303, and $4.8 million in preclinical and other research activities. Additionally, we had an increase of $5.7 million related to
personnel expenses, which includes $1.2 million in stock-based compensation expense, and an increase of $0.3 million related to overhead and facilities.

General and Administrative Expenses

The $3.7 million increase in general and administrative expenses was primarily attributable to increases of $2.5 million in personnel related

expenses, which includes $0.9 million in stock-based compensation expense, $0.8 million related to professional and legal services, and $0.4 million in
insurance, facility and other costs to support the growth and expansion of our business.

Interest Expense

Interest expense relates primarily to interest paid on our term loan with SVB and the related non-cash interest expense associated with the

amortization of the debt discount. Interest expense during the 2021 period is slightly higher due to additional interest related to the drawdown of the second
tranche of our SVB loan in March 2020.

Interest Income

Higher average investment balances during 2021, combined with lower interest rates produced relatively consistent interest income as compared to

the 2020 period.

Other (Expense) Income

Other expense during 2021 consisted of a loss on an asset disposal. In 2020, other income consisted of a $1.0 million research and development tax

credit received by our wholly-owned Australian subsidiary and a $0.3 million employee retention tax credit related to COVID-19 relief legislation.

Comparison of Years Ended December 31, 2020 and 2019

The following table summarizes our results of operations for the years ended December 31, 2020 and 2019 (in thousands): 

Collaboration revenue
Operating expenses:

Research and development
General and administrative
Total operating expenses

Loss from operations
Other income (expense):

Interest expense
Interest income
Other (expense) income

Loss before taxes
Income tax (expense) benefit

Net loss

Years Ended December 31,

2020

2019

Change

$

9,335  $

1,740  $

7,595 

27,185 
10,899 
38,084 
(28,749)

(775)
245 
1,333 
(27,946)
6 

$

(27,940) $

35,847 
9,467 
45,314 
(43,574)

(338)
1,248 
812 
(41,852)
— 
(41,852) $

(8,662)
1,432 
(7,230)
14,825 

(437)
(1,003)
521 
13,906 
6 
13,912 

88

 
 
 
Collaboration Revenue

Revenue for the year ended December 31, 2020 consists of $7.0 million recognized under the AbbVie Agreement and $2.3 million recognized under

the Adaptimmune Agreement. Revenue for the year ended December 31, 2019 consists of $1.3 million related to the Adaptimmune Agreement and $0.4
million related to the milestone payment from Laurel from the sale of our GSNOR assets.

Research and Development Expenses

The $8.7 million decrease in research and development expenses was primarily attributable to decreases of $5.7 million in contract manufacturing

and process development of our product candidates and $4.1 million in other research activities. The decreases were partially offset by increases of $0.6
million in clinical trial activity and $0.5 million in stock-based compensation.

General and Administrative Expenses

The $1.4 million increase in general and administrative expenses was primarily attributable increases of $0.8 million related to professional and

legal services, $0.6 million in stock-based compensation and $0.4 million in insurance and facility costs to support the growth and expansion of our
business. These increases were partially offset by a decrease of $0.4 million related primarily to personnel expenses.

Interest Expense

Interest expense relates primarily to interest paid on our term loan with SVB and the related non-cash interest expense associated with the
amortization of the debt discount. The $0.4 million increase in interest expense is due to additional interest related to the drawdown of the second tranche
of our SVB loan in March 2020.

Interest Income

The $1.0 million decrease in interest income is due primarily to less interest earned on our investments as we maintained a lower average

investment balance during the 2020 period.

Other (Expense) Income

The $0.5 million increase in other (expense) income is attributable a $0.2 million increase in research and development tax credits received by our
wholly-owned Australian subsidiary. Additionally, for the 2020 period, we recognized a $0.3 million employee retention tax credit related to COVID-19
relief legislation.

Liquidity and Capital Resources

Sources of Liquidity

To date, we have financed our operations primarily through the sale of equity securities, debt, and payments received under our collaboration
agreements. As of December 31, 2021, we had cash, cash equivalents, restricted cash, and investments totaling $215.4 million. Except for any obligations
of our collaborators to make milestone payments under our agreements with them, we do not have any committed external sources of capital. Until such
time as we can generate substantial product revenue, if ever, we expect to finance our cash needs through a combination of collaboration agreements and
equity or debt financings.

Equity Financing Agreements

In December 2021, in connection with the execution of the Horizon Agreement, we entered into a Stock Purchase Agreement with Horizon, or the
Purchase Agreement, in which Horizon made an equity investment in Alpine of 951,980 shares of our common stock for approximately $15.76 per share,
for an aggregate purchase price of $15.0 million. The purchase price represents a 25% premium to the volume-weighted average share price of our
common stock for the 30-day period ended December 9, 2021. The shares are subject to lock-up restrictions, which, subject to certain exceptions, prohibit
Horizon from selling the shares for a period of six months after the date of the Purchase Agreement. The shares were recorded at the fair value of our
common stock on the effective date of the Horizon Agreement, with the excess of the proceeds recorded to deferred revenue.

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In September 2021, we entered into a securities purchase agreement, or the 2021 Securities Purchase Agreement, for a private placement with a

select group of institutional investors, pursuant to which we sold 6,489,357 shares of our common stock, or the Shares, and prefunded warrants to purchase
3,191,487 Shares, or the Prefunded Warrants. The purchase price for each Share and for each Prefunded Warrant was $9.40 per share, for an aggregate
purchase price of approximately $91.0 million. The Prefunded Warrants became fully exercisable upon the closing date and have an exercise price of
$0.001 per share. In connection with the 2021 Securities Purchase Agreement approximately 3.7 million of the Shares issued and approximately 2.3 million
of the Prefunded Warrants issued, for gross proceeds of approximately $57.0 million, were issued to certain stockholders whose beneficial ownership
exceeded 5% prior to completion of the 2021 Securities Purchases Agreement.

In July 2021, we entered into a sales agreement, or the Sales Agreement, with Cowen and Company, LLC, or Cowen, pursuant to which we may sell

shares of our common stock from time to time through an “at the market” equity offering for up to $75.0 million in gross cash proceeds. Cowen will act as
the sales agent and will be entitled to compensation for services of up to 3.0% of the gross sales price per share of all shares sold through Cowen under the
Sales Agreement. The shares would be issued pursuant to our effective shelf registration statement on Form S-3 (File No. 333-256107). We filed a
prospectus supplement, dated July 2, 2021, with the SEC in connection with the offer and sale of the shares pursuant to the Sales Agreement. As of the date
of this report, we have made no such sales under the Sales Agreement.

In July 2020, we entered into a securities purchase agreement, or the 2020 Securities Purchase Agreement, for a private placement with a select

group of institutional investors, pursuant to which we sold 5,139,610 units, or the Common Units, and 790,710 units, or the Prefunded Warrant Units, for
an aggregate purchase price of $60.0 million. Each Common Unit consists of one share of our common stock plus a warrant to purchase 0.3 shares of
common stock, or the Common Stock Warrants, and each Prefunded Warrant Unit consists of one prefunded warrant to purchase one share of common
stock, or the Prefunded Warrants, plus one Common Stock Warrant to purchase 0.3 shares of common stock. The Prefunded Warrant Units and the
Common Units are collectively referred to as the Units and each Unit has a purchase price of $10.1175. The Common Stock Warrants have an exercise
price of $12.74 and a term of 3.5 years. The Prefunded Warrants became fully exercisable upon the closing date and have an exercise price of $0.001 per
share.

In January 2019, we entered into a securities purchase agreement, or the 2019 Securities Purchase Agreement, with a limited number of accredited

investors, pursuant to which we sold approximately 4.7 million units, or the 2019 Units, for an aggregate purchase price of $25.3 million in a private
placement, which we refer to as the Private Placement. Each 2019 Unit has a purchase price of $5.37 and consists of one share of our common stock and a
warrant to purchase 0.39 shares of common stock. Pursuant to the terms of the 2019 Securities Purchase Agreement, we issued approximately 4.7 million
shares of common stock and warrants to purchase an aggregate of approximately 1.8 million shares of common stock. The warrants have an exercise price
of $12.74 and have a term of five years.

Debt Financing Agreements

In August 2019, we entered into an Amended and Restated Loan and Security Agreement, or the Loan Agreement, with SVB, pursuant to which

SVB agreed to extend term loans to us with an aggregate principal amount of up to $15.0 million, or the Term Loans. Borrowings under the Loan
Agreement consisted of up to three separate tranches. The initial tranche of $5.0 million was funded in August 2019, $3.0 million of which was used to
repay amounts owing under our prior loan and security agreement with SVB. In March 2020, the second tranche of $5.0 million was funded to us. We did
not draw down the final tranche of $5.0 million, which expired on July 31, 2020.

The Term Loans accrue interest at a floating per annum rate of 0.25% above the prime rate, subject to a floor of 5.75%, which interest is payable
monthly commencing in September 2019. Upon the occurrence and during the continuance of an event of default, a default interest rate will apply that is
4.0% above the otherwise applicable interest rate. The Term Loans were interest only until September 30, 2020, however, under the Loan Agreement our
interest only period automatically extended to June 30, 2021 if we received aggregate new capital of at least $40.0 million no later than June 30, 2020. We
met this milestone in June 2020 in conjunction with the execution of the AbbVie Agreement, discussed in detail in Note 11. As a result of the interest only
extension, the Term Loans will be payable in 25 equal monthly installments of principal plus interest, with the final installment due and payable on July 1,
2023.

We may prepay all, but not less than all, of the Term Loans subject to a prepayment fee equal to $75,000, which represents the deferred portion of

the final payment due under the Original Agreement, plus the outstanding principal balance under the Term Loans at the time of such prepayment
multiplied by a prepayment fee of 2.0% in the first year, 1.0% in the second year, and 0.0% in the third year and thereafter. Additionally a final payment in
the amount of 5.5% of the funded Term Loans is payable to SVB on the date on which the Term Loans are prepaid, paid or become due and payable in full.
The final payment fees are recorded in long-term debt with an offsetting reduction to debt discount on our accompanying Consolidated Balance Sheets.

90

The Loan Agreement contains customary representations and warranties, events of default and affirmative and negative covenants, including,
among others, covenants that limit or restrict our ability to, among other things, incur additional indebtedness, grant liens, merge or consolidate, make
acquisitions, pay dividends or other distributions or repurchase equity, make investments, dispose of assets, engage in any new lines of business, and enter
into certain transactions with affiliates, in each case subject to certain exceptions. Among other events, a failure to make a required loan payment, an
uncured covenant breach or a material adverse change in our business, operations or condition (financial or otherwise) could lead to an event of default, and
in such case, all amounts then outstanding may become due and payable immediately. We were in compliance with our covenants as of December 31, 2021.
As security for its obligations under the Loan Agreement, we granted SVB a first priority security interest on substantially all of our assets, except
intellectual property, and subject to certain other exceptions. As of December 31, 2021, we had $8.2 million in outstanding principal and final fees due
under our term loan agreement. See Note 9 for further discussion of our Term Loans.

Cash Flows

The following is a summary of our cash flows (in thousands): 

Net cash (used in) provided by operating activities
Net cash (used in) provided by investing activities
Net cash provided by (used in) financing activities

 Net cash (used in) provided by operating activities:

2021

Years Ended December 31,
2020

2019

$

(15,248) $
(52,480)
100,764 

30,084  $
(72,819)
61,381 

(35,346)
16,763 
24,255 

Net cash used in operating activities was $15.2 million for the year ended December 31, 2021 and consisted primarily of our net loss of $50.3

million. This was offset by an increase of $27.3 million in our net operating assets and liabilities. Additionally, we had a $7.8 million increase in our net
non-cash adjustments, which primarily relates to stock-based compensation, depreciation and amortization.

Net cash provided by operating activities was $30.1 million for the year ended December 31, 2020 and consisted primarily of our net loss of $27.9

million. This was offset by an increase of $52.9 million in our net operating assets and liabilities. This increase was primarily driven by the receipt of a
$60.0 million upfront payment from AbbVie, which was recorded as current and noncurrent deferred revenue on our accompanying Consolidated Balance
Sheets. Additionally, we had an increase of $5.1 million in our net non-cash adjustments, which primarily relates to stock-based compensation, depreciation
and amortization.

Net cash used in operating activities was $35.3 million for the year ended December 31, 2019 and consisted primarily of our net loss of $41.9

million. This was offset by an increase of $3.2 million in our net operating assets and liabilities and an increase of $3.3 million in our net non-cash
adjustments, which primarily relate to stock-based compensation, depreciation and amortization.

Net cash (used in) provided by investing activities:

Cash flows from investing activities primarily reflect cash used to purchase investments and proceeds from the maturities and sales of investments,

thus causing a shift between our cash and cash equivalents and investment balances. We manage our cash usage with respect to our total cash, cash
equivalents and investments.

Net cash used in investing activities was $52.5 million for the year ended December 31, 2021 and consisted primarily of our purchases and
maturities of investments in U.S. Treasury securities, commercial paper, and corporate debt securities, partially offset by purchases of property and
equipment, primarily lab equipment, to support our research and development efforts.

Net cash used in investing activities was $72.8 million for the year ended December 31, 2020 and consisted primarily of our purchases and
maturities of investments in U.S. Treasury securities, commercial paper, and corporate debt securities, partially offset by purchases of property and
equipment, primarily lab equipment, to support our research and development efforts.

Net cash provided by investing activities was $16.8 million during the year ended December 31, 2019 and consisted primarily of the maturities,

sales and purchases of short-term investments in U.S. Treasury securities, commercial paper, and corporate debt securities, partially offset by purchases of
property and equipment, primarily lab equipment, to support our research and development efforts.

91

 
 
Net cash provided by financing activities:

Net cash provided by financing activities was $100.8 million for the year ended December 31, 2021 and consisted primarily of the net proceeds of

$90.7 million related to the sale of approximately 6.5 million shares of common stock and 3.2 million prefunded warrants under our 2021 Securities
Purchase Agreement, $11.9 million in proceeds related to the fair value of our common stock purchased by Horizon in December 2021, and $0.5 million
related to the exercise of stock options. These were partially offset by $2.4 million in principal payments on our debt.

Net cash provided by financing activities was $61.4 million for the year ended December 31, 2020 and consisted primarily of the net proceeds of

$56.3 million related to the sale of approximately 5.9 million Units under our 2020 Securities Purchase Agreement, $5.0 million in proceeds received from
the draw down of the second tranche of our Loan Agreement in March 2020, and $0.1 million related to the exercise of stock options.

Net cash provided by financing activities was $24.3 million for the year ended December 31, 2019 and consisted primarily of the net proceeds of
$23.6 million related to the sale of approximately 4.7 million Units under our 2019 Securities Purchase Agreement and $2.0 million in net proceeds from
our debt refinancing, partially offset by $1.3 million in principal payments on our debt.

Funding Requirements

We have incurred operating losses since inception. We expect to continue to incur significant expenses and operating losses for the foreseeable
future as we continue our research and preclinical and clinical development of our product candidates; expand the scope of our current studies for our
product candidates; initiate additional preclinical, clinical or other studies for our product candidates, including under any collaboration agreements; change
or add additional manufacturers or suppliers; seek regulatory and marketing approvals for any of our product candidates that successfully complete clinical
studies; seek to identify, evaluate and validate additional product candidates; acquire or in-license other product candidates and technologies; maintain,
protect and expand our intellectual property portfolio; attract and retain skilled personnel; and experience any delays or encounter issues with any of the
above. Additionally, we have ongoing obligations with respect to our Loan Agreement, as described above, and our Operating Lease and certain
contingencies, as described below.

Operating Lease

In March 2019, we entered into a lease with ARE-Seattle No. 28, LLC, or the Landlord, for 27,164 square feet of office and laboratory space

located at 188 East Blaine Street, Seattle, Washington. The term of the lease is 10.8 years with one option to extend the term by 5 years. The lease term
commenced in June 2019. The “Rent Commencement Date” began in March 2020, nine months after the commencement date. We were not required to pay
base rent from the Rent Commencement Date through November 2020, the last day of the ninth month following the Rent Commencement Date. The
annual base rent under the lease is $1.7 million for the first year and will increase by 3.0% each year thereafter. We received a tenant improvement
allowance of $5.4 million, which is included in our base rent, and a maximum additional tenant improvement allowance of $1.8 million, which will result
in additional rent amortized over the term of the lease at an annual rate of 8.0%. The lease also requires us to pay additional amounts for operating and
maintenance expenses. In March 2019, in connection with the lease, we provided a $254,000 letter of credit as a security deposit, which is recorded as
restricted cash in our accompanying Consolidated Balance Sheets. See further discussion of our operating lease in Note 10.

Contingencies

Certain credits received related to our research and development expenditures and recorded within other income in our accompanying Consolidated

Statements of Operations and Comprehensive Income (Loss) are subject to review by foreign taxing authorities. It is reasonably possible we may incur
losses upon the completion of these reviews of up to approximately $1.8 million, which we would be required to repay to certain tax authorities.

Until such time as we can generate substantial product revenue, if ever, we expect to finance our cash needs through a combination of equity or debt

financings and collaboration agreements. To the extent that we raise additional capital through the future sale of equity or debt, the ownership interest of
our stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our existing
common stockholders. If we raise additional funds through collaboration agreements in the future, we may have to relinquish valuable rights to our
technologies, future revenue streams or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional
funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future
commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

Our future capital requirements are difficult to forecast and will depend on many factors, including:

92

•

•

•

•

•

•

•

•

•

the number and characteristics of the future product candidates we pursue either from our internal research efforts or through acquiring or in-
licensing other product candidates or technologies;

the scope, progress, results and costs of independently researching and developing any of our future product candidates, including conducting
preclinical research and clinical trials;

whether our existing collaborations generate substantial milestone payments and, ultimately, royalties on future approved products for us;

the timing of, and the costs involved in, obtaining regulatory approvals for any future product candidates we develop independently;

the cost of future commercialization activities, if any;

the cost of manufacturing our future product candidates and products, if any;

our ability to maintain our existing collaborations and to establish new collaborations, licensing or other arrangements and the financial terms
of such arrangements;

the costs of preparing, filing, prosecuting, maintaining, defending and enforcing patents, including litigation costs and the outcome of such
litigation; and

the timing, receipt and amount of sales of, or royalties on, our current or future collaborators’ product candidates, and our future products, if
any.

We have considered that our long-term operations anticipate continuing net losses and the need for potential equity or debt financing. We have also

considered that new collaborations or selectively partnering our technology or programs may provide other sources of capital. However, there can be no
assurances that additional funding or other sources of capital will be available on terms acceptable to us, or at all. Based on our current operating plan, we
believe our available cash and cash equivalents and investments, will be sufficient to fund our planned level of operations for at least the next 12 months.
We have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we expect. Additionally, the
process of testing drug candidates in preclinical and clinical studies is costly, and the timing of progress in these studies remains uncertain. Further,
inflation may affect our use of capital resources by increasing our cost of labor and clinical trial expenses. Our long-term funding requirements will consist
of operational, capital, and manufacturing expenditures, including those contractual commitments described above. Because of the inherent risks and
uncertainties associated with the development and commercialization of our product candidates, we are unable to estimate the amounts of capital outflows
and operating expenditures associated with our long-term anticipated preclinical studies and clinical trials.

Critical Accounting Policies and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements,

which we have prepared in accordance with generally accepted accounting principles in the United States, or GAAP. The preparation of these consolidated
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 consolidated financial statements, as well as the reported revenues and expenses during the reporting periods. We
evaluate these estimates and judgments on an ongoing basis. We base our estimates on 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. Our actual results may differ from these estimates under different assumptions or conditions.

While our significant accounting policies are more fully described in Note 2 to our consolidated financial statements, we believe that the following

accounting policies are the most critical to fully understanding and evaluating our financial condition and results of operations.

Accrued Liabilities

As part of the process of preparing our consolidated financial statements, we are required to estimate accruals for professional services and research

and development expenses. This process involves reviewing contracts and vendor agreements and communicating with applicable personnel to identify
services that have been performed on our behalf. We estimate the level of service performed and the associated cost incurred for the service when we have
not yet been invoiced or otherwise notified of the actual cost. We estimate accrued liabilities as of each balance sheet date based on known facts and
circumstances.

93

Although we do not expect our estimates to be materially different from amounts actually incurred, if our estimates of the status and timing of

services performed differ from the actual status and timing of services performed, we may report amounts that are too high or too low in any particular
period. To date, we have not experienced any significant adjustments to our estimates.

Revenue Recognition

Revenue recognition is a critical accounting estimate due to the magnitude and nature of the upfront cash and milestone payments we receive. Our

primary sources of revenue is derived from our collaboration and licensing agreements.

Revenue is recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration

we expect to be entitled to in exchange for those goods or services. Our steps for recognizing revenue consist of; (1) identifying the contract, (2) identifying
the performance obligations as either distinct or bundled goods and services, (3) determining the transaction price associated with each performance
obligation for which we expect to be entitled in exchange for transferring such goods and services, (4) allocating the transaction price to the performance
obligations in the contract and (5) recognizing revenue upon satisfaction of performance obligations.

Our collaboration agreements principally contain multiple performance obligations, which may include (1) grants of, or options to obtain,

intellectual property licenses; (2) research and development services; and/or (3) manufacturing or supply services. Payments typically received under these
arrangements include one or more of the following: non-refundable upfront license fees, option exercise fees, payment for research and/or development
efforts, amounts due upon the achievement of specified objectives, and/or royalties on future product sales. Our revenue is primarily derived from our
collaboration agreements with Adaptimmune, AbbVie, and Horizon. See further discussion of our collaboration agreements in Note 11.

We allocate revenue to each performance obligation based on its relative stand-alone selling price. We generally determine stand-alone selling prices

at the inception of the contract based on our best estimate of what the selling price would be if the deliverable was regularly sold by us on a stand-alone
basis. Payments received prior to satisfying the relevant revenue recognition criteria are recorded as deferred revenue in the accompanying Consolidated
Balance Sheets and recognized as revenue when the related revenue recognition criteria are met. We recognize revenue under our collaboration agreements
by using a cost-based input method to measure progress toward completion of the performance obligation, including employee hours contributed to each
performance obligation, and to calculate the corresponding revenue to recognize each period.

Our collaboration agreements provide for non-refundable milestone payments. We recognize revenue that is contingent upon the achievement of a

substantive milestone in its entirety in the period in which the milestone is achieved. A milestone is considered substantive when the consideration payable
to us for such milestone (1) is consistent with our performance necessary to achieve the milestone or the increase in value to the collaboration resulting
from our performance; (2) relates solely to our past performance; and (3) is reasonable relative to all of the other deliverables and payments within the
arrangement. In making this assessment, we consider all facts and circumstances relevant to the arrangement, including factors such as the scientific,
regulatory, commercial, and other risks that must be overcome to achieve the milestone, the level of effort and investment required to achieve the milestone
and whether any portion of the milestone consideration is related to future performance or deliverables.

We review the contributed employee hours and progress towards completion for each performance obligation under our collaboration agreements

and adjust the revenue recognized to reflect changes in assumptions relating to the estimated satisfaction of the performance obligation. Revenue
recognition may be accelerated in the event of early termination of programs or if our expectations change. Alternatively, revenue recognition may be
decelerated if programs are extended or delayed. While such changes to our estimates have no impact on our reported cash flows, the timing of revenue
recorded in future periods could be materially impacted.

Stock-based Compensation

Stock-based compensation is recognized for all share-based payments based on the estimated fair value as of the date of grant. The fair value of our

stock options is calculated using the Black-Scholes option pricing model, which requires us to apply our judgment regarding certain key assumptions
including risk-free interest rate, expected term, volatility and dividend yield. For risk-free interest rate, we use the zero-coupon U.S. Treasury instruments
security rate with a term equal to the expected life of the option. We use the “simplified method” for options to determine the expected term of stock
options. Under this approach, the weighted-average expected life is presumed to be the average of the vesting term and the contractual term of the option.
For volatility, we analyzed the stock price volatility of companies at a similar stage of development to estimate expected volatility of our stock price. Our
assumed dividend yield is zero as we have never paid cash dividends and have no present intention to pay cash dividends. The fair value of restricted stock
units, or RSUs, is based on the closing price of our common stock on the award date. Stock-based compensation expense is recognized over the requisite
service period of the awards, usually the vesting

94

period, on a straight-line basis. For performance-based awards where the vesting of the options may be accelerated upon the achievement of certain
milestones, the related stock-based compensation is recognized as expense when it is probable the milestone will be met. We recognize forfeiture of awards
as they occur rather than estimating the expected forfeiture rate.

If factors change and we employ different assumptions for estimating stock-based compensation expense in future periods, or if we decide to use a

different valuation model, the stock-based compensation expense we recognize in future periods may differ significantly from what we have recorded in the
current period and could materially affect our financial statements.

Income Taxes

Income taxes are accounted for using an asset and liability approach that requires the recognition of deferred tax assets and liabilities for the
expected future tax consequences of temporary differences between the consolidated financial statement and tax bases of assets and liabilities at the
applicable enacted tax rates. We will establish a valuation allowance for deferred tax assets if it is more likely than not that these items will expire before
we are able to realize their benefits or that future deductibility is uncertain.

We recognize the tax benefit from uncertain tax positions only if it is more likely than not that the tax position will be sustained on examination by

the tax authorities, based on the technical merits of the position. The tax position is measured based on the largest benefit that has a greater than 50%
likelihood of being realized upon ultimate settlement. We recognize interest and penalties related to income tax matters in income tax expense if incurred.

Recently Adopted Accounting Pronouncements

In December 2019, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, No. 2019-12, Income

Taxes, or Topic 740: Simplifying the Accounting for Income Taxes. This ASU simplifies the accounting for income taxes by removing certain exceptions
to the general principles in Topic 740 and also improves consistent application by clarifying and amending existing guidance. The standard is effective for
fiscal years and interim periods within those fiscal years, beginning after December 15, 2020. We adopted this standard on January 1, 2021, and concluded
that the adoption of the standard did not have a material impact on our consolidated financial statements and related disclosures.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

As a “smaller reporting company,” as defined by Rule 12b-2 of the Exchange Act, and pursuant to Item 305 of Regulation S-K we are not required

to provide quantitative and qualitative disclosures about market risk.

Item 8. Financial Statements and Supplementary Data.

For information regarding our financial statements and supplementary data, please refer to the Notes to Consolidated Financial Statements included

elsewhere in this report.

As a “smaller reporting company,” as defined by Rule 12b-2 of the Exchange Act and pursuant to Article 8, Regulation X and Item 302 of

Regulation S-K, we are permitted to provide scaled Item 8 disclosure.

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, evaluated the effectiveness of our disclosure
controls and procedures as of December 31, 2021. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the
Securities Exchange Act of 1934, or the Exchange Act, means controls and other procedures of a company that are designed to ensure that information
required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported,
within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without
limitation, controls and procedures designed to ensure that information required to be disclosed by a company

95

in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal
executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Our management recognizes that any
controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and our
management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our
disclosure controls and procedures as of December 31, 2021, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our
disclosure controls and procedures were effective at the reasonable assurance level.

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 Rule 13a-15(f) and

Rule 15d-15(f) of the Exchange Act. Our internal control over financial reporting is a process 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. Our
internal control over financial reporting includes those policies and procedures that:

(i)

pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets;

(ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with

generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of our
management and directors; and

(iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could

have a material effect on the financial statements.

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, any system of internal control over financial reporting, including ours, no matter how well designed and operated, can only provide
reasonable, not absolute, assurances. Also, 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. Our management assessed
the effectiveness of our internal control over financial reporting as of December 31, 2021. In making this assessment, our management used the criteria set
forth by the Committee of Sponsoring Organizations of the Treadway Commission, or COSO, Internal Control-Integrated Framework (2013). Based on our
assessment using those criteria, our management has concluded that, as of December 31, 2021, our internal control over financial reporting was effective.

Changes in Internal Control Over Financial Reporting

No significant changes in our internal control over financial reporting occurred during the fiscal quarter ended December 31, 2021, that has

materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Auditor Attestation

We ceased to be an “emerging growth company” under the JOBS Act effective December 31, 2020. However, for so long as we are not classified as
an “accelerated filer” or “large accelerated filer” pursuant to SEC rules, we will continue to be exempt from the auditor attestation requirements of Section
404(b) of Sarbanes-Oxley.

Item 9B. Other Information.

None.

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.

Not applicable.

96

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

The information required by Item 10 of Form 10-K is incorporated by reference to our Proxy Statement for the 2022 Annual Meeting of

Stockholders to be filed with the SEC within 120 days after the end of the fiscal year ended December 31, 2021.

Item 11. Executive Compensation.

The information required by Item 11 of Form 10-K is incorporated by reference to our Proxy Statement for the 2022 Annual Meeting of

Stockholders to be filed with the SEC within 120 days after the end of the fiscal year ended December 31, 2021.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required by Item 12 of Form 10-K is incorporated by reference to our Proxy Statement for the 2022 Annual Meeting of

Stockholders to be filed with the SEC within 120 days after the end of the fiscal year ended December 31, 2021.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information required by Item 13 of Form 10-K is incorporated by reference to our Proxy Statement for the 2022 Annual Meeting of

Stockholders to be filed with the SEC within 120 days after the end of the fiscal year ended December 31, 2021.

Item 14. Principal Accounting Fees and Services.

The information required by Item 14 of Form 10-K is incorporated by reference to our Proxy Statement for the 2022 Annual Meeting of

Stockholders to be filed with the SEC within 120 days after the end of the fiscal year ended December 31, 2021.

97

Item 15. Exhibits, Financial Statement Schedules.

PART IV

(a) The financial statements, schedules and exhibits filed as a part of this Annual Report on Form 10-K are as follows:

(a) Financial statements – The financial statements included in Item 8 are filed as part of this Annual Report on Form 10-K.
(b) Financial Statement Schedules – All schedules have been omitted because they are not applicable or required, or the information required to
be set forth therein is included in the consolidated financial statements or notes thereto included in Item 8 of this Annual Report on Form
10-K.

(c) Exhibits – The exhibits required to be filed as part of this report are listed in the Exhibit List attached hereto and are incorporated herein by

reference.

INDEX TO EXHIBITS

Exhibit Number
3.1

3.2
4.1
4.2

4.3

4.4

4.5

4.6

4.7

4.8
4.9

10.1*
10.2*

10.3*

10.4*

Description

Amended and Restated Certificate of Incorporation of the
Registrant, as amended
Amended and Restated Bylaws of the Registrant
Form of Common Stock Certificate of the Registrant
Warrant to Purchase Shares, dated December 16, 2016, by and
between Alpine Immune Sciences, Inc. and Silicon Valley Bank
Form of Warrant to Purchase Shares of Common Stock issued to
certain service providers on April 12, 2017 pursuant to the
Amended and Restated 2015 Stock Plan, as amended
Form of Warrant to Purchase Common Stock issued pursuant to
the Securities Purchase Agreement, dated January 15, 2019, by
and among the Registrant and the Purchasers party thereto
Warrant to Purchase Common Stock, dated August 26, 2019, by
and between Alpine Immune Sciences, Inc. and Silicon Valley
Bank
Form of Warrant to Purchase Common Stock issued pursuant to
the Securities Purchase Agreement, dated July 24, 2020, by and
among Alpine Immune Sciences, Inc. and the Purchasers party
thereto
Form of Prefunded Warrant to Purchase Common Stock issued
pursuant to the Securities Purchase Agreement, dated July 24,
2020, by and among Alpine Immune Sciences, Inc. and the
Purchasers party thereto
Description of Capital Stock
Form of Prefunded Warrant to Purchase Common Stock issued
pursuant to the Securities Purchase Agreement, dated September
14, 2021, by and among the Alpine Immune Sciences, Inc. and
the Purchasers party thereto
Nivalis Therapeutics, Inc. 2015 Equity Incentive Plan
Form of Notice of Stock Option Grant and Stock Option
Agreement for Employees under the Nivalis Therapeutics, Inc.
2015 Equity Incentive Plan
Form of Notice of Stock Option Grant and Stock Option
Agreement for Non-Employee Directors under the Nivalis
Therapeutics, Inc. 2015 Equity Incentive Plan
Nivalis Therapeutics, Inc. Employee Stock Purchase Plan

98

Form
10-K

10-K
10-K
10-K

10-K

8-K

8-K

Incorporated by Reference

File No.
001-37449

001-37449
001-37449
001-37449

001-37449

Exhibit
3.1

Filing Date
March 28, 2018

3.2
4.1
4.5

4.6

March 18, 2021
March 28, 2018
March 28, 2018

March 28, 2018

001-37449

10.3

January 16, 2019

001-37449

4.1

August 28, 2019

8-K

001-37449

10.3

July 24, 2020

8-K
10-K
8-K

001-37449
001-37449
001-37449

S-8
S-8

S-8

S-8

333-205220
333-205220

333-205220

333-205220

10.4
4.1
10.3

4.4
4.5

4.6

4.7

July 24, 2020
March 18, 2021
September 14, 2021

June 25, 2015
June 25, 2015

June 25, 2015

June 25, 2015

 
 
Exhibit Number
10.5*

10.6*
10.7*
10.8*

10.9*

10.10*

10.11*

10.12*

10.13*+

10.14*

10.15*

10.16*

10.17*

10.18*

10.19

10.20*

10.21

10.22

10.23**

10.24

10.25

10.26

10.27

Description
Form of Indemnification Agreement entered into by and between
the Registrant and its directors and officers
Non-Employee Director Compensation Guidelines
Change of Control and Severance Policy
Employment Agreement, dated as of January 1, 2018, by and
between the Registrant and Mitchell H. Gold, M.D.
Employment Agreement, dated as of January 1, 2018, by and
between the Registrant and Paul Rickey
Employment Agreement, dated as of January 1, 2018, by and
between the Registrant and Stanford Peng, M.D., Ph.D.
Employment Agreement, dated as of June 1, 2021, by and
between the Registrant and Zelanna Goldberg
Form of Stand-Alone Inducement Stock Option Grant between
the Registrant and Zelanna Goldberg
Separation Agreement, dated as of October 8, 2021, by and
between the Registrant and Zelanna Goldberg
Alpine Immune Sciences, Inc. (now known as AIS Operating
Co., Inc.) Amended and Restated 2015 Stock Plan, as amended
Form of Option Agreement under the Alpine Immune Sciences,
Inc. (now known as AIS Operating Co., Inc.) Amended and
Restated 2015 Stock Plan, as amended
Alpine Immune Sciences, Inc. 2018 Equity Incentive Plan, as
amended
Form of Stock Option Agreement under the 2018 Equity
Incentive Plan
Form of Restricted Stock Unit Agreement under the 2018 Equity
Incentive Plan
Securities Purchase Agreement, dated January 15, 2019, by and
among the Company and the Purchasers
Alpine Immune Sciences, Inc. Executive Incentive
Compensation Plan
Lease Agreement, dated March 14, 2019, by and between the
Company and ARE Seattle No. 28, LLC
Amended and Restated Loan and Security Agreement, dated
August 26, 2019, by and among Alpine Immune Sciences, Inc.,
AIS Operating Co., Inc. and Silicon Valley Bank
Option and License Agreement, dated June 17, 2020, by and
between Alpine Immune Sciences, Inc. and AbbVie Ireland
Unlimited Company
Securities Purchase Agreement, dated July 24, 2020, by and
among Alpine Immune Sciences, Inc. and the Purchasers named
therein
Registration Rights Agreement, dated July 24, 2020, by and
among Alpine Immune Sciences, Inc. and the Purchasers named
therein
Sales Agreement, dated as of July 2, 2021, between Alpine
Immune Sciences, Inc. and Cowen and Company, LLC
Securities Purchase Agreement, dated September 14, 2021, by
and among Alpine Immune Sciences, Inc. and the Purchasers
thereto

99

Incorporated by Reference

File No.
333-204127

Exhibit
10.18

Filing Date
May 13, 2015

Form
S-1

10-K
8-K
10-K

10-K

10-K

10-Q

10-Q

001-37449
001-37449
001-37449

001-37449

001-37449

001-37449

001-37449

S-8 POS

333-218134

S-8 POS

333-218134

8-K

8-K

8-K

8-K

8-K

10-Q

8-K

001-37449

001-37449

001-37449

001-37449

001-37449

001-37449

001-37449

10.6
10.1
10.33

10.35

10.37

10.2

10.1

4.1

4.2

10.1

10.2

10.1

10.1

10.1

10.6

10.1

March 18, 2021
December 11, 2017
March 28, 2018

March 28, 2018

March 28, 2018

August 10, 2021

August 10, 2021

September 11, 2017

September 11, 2017

June 17, 2020

June 14, 2018

January 27, 2020

January 16, 2019

April 1, 2019

May 9, 2019

August 28, 2019

10-Q

001-37449

10.2

August 11, 2020

8-K

8-K

8-K

8-K

001-37449

10.1

July 24, 2020

001-37449

10.2

July 24, 2020

001-37449

1.1

July 2, 2021

001-37449

10.1

September 14, 2021

 
 
Exhibit Number
10.28

10.29

10.30+**

10.31+

21.1
23.1+
24.1+
31.1+

31.2+

32.1+

32.2+

101.INS+
101.SCH+
101.CAL+

101.LAB+
101.PRE+

101.DEF+

104

*

+

**

Incorporated by Reference

Form
8-K

File No.
001-37449

Exhibit
10.2

Filing Date
September 14, 2021

8-K

001-37449

10.4

September 14, 2021

10-K

001-37449

21.1

March 28, 2018

Description

Registration Rights Agreement, dated September 14, 2021, by
and among Alpine Immune Sciences, Inc. and the Purchasers
thereto
Exchange Agreement, dated September 14, 2021, by and
between Alpine Immune Sciences, Inc. and Frazier Life Sciences
VIII, L.P.
License and Collaboration Agreement, dated December 15, 2021
by and between Alpine Immune Sciences, Inc. and Horizon
Therapeutics Ireland DAC
Stock Purchase Agreement, dated December 15, 2021 by and
between Alpine Immune Sciences, Inc. and Horizon
Therapeutics Ireland DAC
List of subsidiaries of the Registrant
Consent of Independent Registered Public Accounting Firm
Powers of Attorney (contained on signature page)
Certification of Principal Executive Officer Required Under
Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act of
1934, as amended
Certification of Principal Financial Officer Required Under
Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act of
1934, as amended
Certification of Principal Executive Officer Required Under
Rule 13a-14(b) of the Securities Exchange Act of 1934, as
amended, and 18 U.S.C. Section 1350
Certification of Principal Financial Officer Required Under Rule
13a-14(b) of the Securities Exchange Act of 1934, as amended,
and 18 U.S.C. Section 1350
Inline XBRL Instance Document
Inline XBRL Taxonomy Extension Schema Document
Inline XBRL Taxonomy Extension Calculation Linkbase
Document
Inline XBRL Taxonomy Extension Label Linkbase Document
Inline XBRL Taxonomy Extension Presentation Linkbase
Document
Inline XBRL Taxonomy Extension Definition Linkbase
Document
Cover page formatted as Inline XBRL and contained in Exhibit
101

Indicates a management contract or a compensatory plan, contract or arrangement.

Filed herewith.

Portions of this exhibit have been omitted in accordance with Item 601(b)(10) of Regulation S-K because they are private, confidential and not
material.

100

 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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.

SIGNATURES

Date: March 17, 2022

Date: March 17, 2022

ALPINE IMMUNE SCIENCES, INC.

By:
Name:
Title

/s/  Mitchell H. Gold, M.D.
Mitchell H. Gold, M.D.
Executive Chairman and Chief Executive Officer

ALPINE IMMUNE SCIENCES, INC.

By:
Name:
Title:

/s/  Paul Rickey
Paul Rickey
Senior Vice President and Chief Financial Officer

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Mitchell H. Gold, M.D.

and Paul Rickey, and each of them, with full power of substitution and resubstitution and full power to act without the other, as his or her true and lawful
attorney-in-fact and agent to act in his or her name, place and stead and to execute in the name and on behalf of each person, individually and in each
capacity stated below, and to file, any and all documents in connection therewith, with the 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, ratifying and confirming all that
said attorneys-in-fact and agents or any of them or their and his or her substitute or substitutes, may lawfully do or cause to be done by virtue thereof.

 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.

101

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Name

Title

Date

/s/ Mitchell H. Gold, M.D.
Mitchell H. Gold, M.D.

/s/ Paul Rickey
Paul Rickey

/s/ Peter Thomson, M.D.
Peter Thompson, M.D.

/s/ James N. Topper, M.D., Ph.D.
James N. Topper, M.D., Ph.D.

/s/ Jay Venkatesan, M.D.
Jay Venkatesan, M.D.

/s/ Robert Conway
Robert Conway

/s/ Natasha Hernday
Natasha Hernday

/s/ Christopher Peetz
Christopher Peetz

/s/ Xiangmin Cui, Ph.D.
Xiangmin Cui, Ph.D.

Chief Executive Officer and Executive Chairman of the Board
of Directors (Principal Executive Officer)

Senior Vice President and Chief Financial Officer (Principal
Accounting and Financial Officer)

Director

Director

Director

Director

Director

Director

Director

102

March 17, 2022

March 17, 2022

March 17, 2022

March 17, 2022

March 17, 2022

March 17, 2022

March 17, 2022

March 17, 2022

March 17, 2022

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Ernst & Young LLP, Independent Registered Public Accounting Firm (PCAOB ID: 42)

Consolidated Balance Sheets

Consolidated Statements of Operations and Comprehensive Income (Loss)

Consolidated Statements of Stockholders’ Equity

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

F-1

F-2

F-4

F-5

F-6

F-7

F-8

 
 
 
 
 
 
 
 
 
 
 
Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Alpine Immune Sciences, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Alpine Immune Sciences, Inc. (the Company) as of December 31, 2021 and 2020, the
related consolidated statements of operations and comprehensive income (loss), stockholder’s equity and cash flows for each of the three years in the
period ended December 31, 2021, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated
financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2021 and 2020, and the results of its
operations and its cash flows for each of the three years in the period ended December 31, 2021, in conformity with U.S. generally accepted accounting
principles.

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.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current and prior period audits of the financial statements that was communicated
or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2)
involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion
on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion
on the critical audit matter or on the account or disclosure to which it relates.

F-2

 
Description of the Matter

Description of the Matter

Accounting for Revenue under the AbbVie Collaboration Agreement

As discussed in Note 11 to the consolidated financial statements, the Company
entered into an option and license agreement with AbbVie Ireland Unlimited
Company for the development of ALPN-101 in June 2020. Collaboration revenue
recognized from the AbbVie Agreement was $23.4 million and $7.0 million for the
year ended December 31, 2021 and 2020, respectively. The Company determined
that all contractual promises related to the upfront payment and Alpine’s
Development Milestone represent a single performance obligation and used a cost-
based input method to measure progress toward completion of the performance
obligation and to calculate the corresponding revenue to recognize each period.

Auditing the Company’s estimated measure of progress toward completion of the
performance obligation is complex. A cost-based input method of revenue
recognition requires management to make estimates of total expected costs to
complete the performance obligation. In making such estimates, significant judgment
is required to evaluate key assumptions related to cost estimates, including internal
personnel efforts and third-party contract costs.

As discussed in Note 11 to the consolidated financial statements, the Company entered into
an option and license agreement with AbbVie Ireland Unlimited Company for the
development of ALPN-101 in June 2020. Collaboration revenue recognized from the AbbVie
Agreement was $23.4 million and $7.0 million for the year ended December 31, 2021 and
2020, respectively. The Company determined that all contractual promises related to the
upfront payment and Alpine’s Development Milestone represent a single performance
obligation and used a cost-based input method to measure progress toward completion of the
performance obligation and to calculate the corresponding revenue to recognize each period.

Auditing the Company’s estimated measure of progress toward completion of the
performance obligation is complex. A cost-based input method of revenue recognition
requires management to make estimates of total expected costs to complete the performance
obligation. In making such estimates, significant judgment is required to evaluate key
assumptions related to cost estimates, including internal personnel efforts and third-party
contract costs.

How We Addressed the Matter in Our Audit To test revenue recognized, we performed audit procedures that included, among others,

gaining an understanding and testing the Company’s estimates of total expected costs
including testing the completeness and accuracy of the underlying data, inspecting evidence
of actual costs incurred and comparing with previous estimates. We evaluated any changes in
the total expected costs, inspected communications between the Company and AbbVie
regarding updates to estimated budgeted costs as well as any significant changes in its
development plan, performed sensitivity analyses of key assumptions and compared the
estimates to actual incurred costs for the same or similar activities. We discussed the basis for
key assumptions with the Company's research and development personnel to assess
management's key assumptions used in the Company's estimates of total expected costs.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2015.
Seattle, WA
March 17, 2022

F-3

 
 
ALPINE IMMUNE SCIENCES, INC.
CONSOLIDATED BALANCE SHEETS
(in thousands, except share and per share amounts)

Assets
Current assets:

Cash and cash equivalents
Short-term investments
Accounts receivable
Prepaid expenses and other current assets

Total current assets

Restricted cash, noncurrent
Property and equipment, net
Operating lease, right-of-use asset
Long-term investments
Deferred tax asset
Total assets

Liabilities and stockholders’ equity
Current liabilities:

Accounts payable
Accrued liabilities
Deferred revenue, current
Operating lease liability, current
Current portion of long-term debt

Total current liabilities
Deferred revenue, noncurrent
Operating lease liability, noncurrent
Long-term debt

Total liabilities

Commitments and contingencies
Preferred stock, $0.001 par value per share; 10,000,000 shares authorized at December 31, 2021 and 2020; zero
shares issued and outstanding at December 31, 2021 and 2020
Stockholders’ equity:

Common stock, $0.001 par value per share; 200,000,000 shares authorized at December 31, 2021 and 2020;
31,444,746 shares issued and 30,194,279 shares outstanding at December 31, 2021; 23,853,650 shares issued and
23,803,183 shares outstanding at December 31, 2020
Treasury stock, at cost; 1,250,467 shares and 50,467 shares at December 31, 2021 and 2020, respectively
Additional paid-in capital
Accumulated other comprehensive (loss) gain
Accumulated deficit

Total stockholders’ equity
Total liabilities and stockholders’ equity

December 31,

2021

2020

67,907  $
94,396 
25,000 
4,710 
192,013 
254 
1,716 
8,837 
52,866 
214 
255,900  $

3,349  $
9,417 
51,773 
617 
4,622 
69,778 
50,830 
11,009 
3,380 
134,997 

34,959 
70,622 
— 
1,520 
107,101 
254 
1,785 
9,401 
25,549 
— 
144,090 

582 
5,777 
31,627 
655 
2,526 
41,167 
21,348 
11,815 
7,602 
81,932 

— 

— 

30 
— 
287,345 
(273)
(166,199)
120,903 
255,900  $

24 
— 
177,947 
53 
(115,866)
62,158 
144,090 

$

$

$

$

The accompanying notes are an integral part of these consolidated financial statements.

F-4

 
 
 
 
ALPINE IMMUNE SCIENCES, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
(in thousands, except share and per share amounts)

Collaboration revenue
Operating expenses:

Research and development
General and administrative
Total operating expenses

Loss from operations
Other income (expense):

Interest expense
Interest income
Other (expense) income

Loss before taxes
Income tax (expense) benefit
Net loss

Comprehensive income (loss):

Unrealized loss on investments
Unrealized (loss) gain on foreign currency translation

Comprehensive loss

Weighted-average shares used to compute basic and diluted net loss per share

Basic and diluted net loss per share

2021

Years Ended December 31,
2020

2019

$

23,443  $

9,335  $

1,740 

58,742 
14,560 
73,302 
(49,859)

(816)
259 
(4)
(50,420)
87 
(50,333) $

(238)
(88)
(50,659) $

27,185 
10,899 
38,084 
(28,749)

(775)
245 
1,333 
(27,946)
6 

(27,940) $

(15)
58 
(27,897) $

35,847 
9,467 
45,314 
(43,574)

(338)
1,248 
812 
(41,852)
— 
(41,852)

29 
(6)
(41,829)

25,476,889

20,826,466

18,358,864

(1.98) $

(1.34) $

(2.28)

$

$

$

The accompanying notes are an integral part of these consolidated financial statements.

F-5

 
 
 
 
ALPINE IMMUNE SCIENCES, INC.
CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY
(in thousands, except share and per share amounts)

Balance, December 31, 2018

Issuance of Units in Private Placement, net of offering costs
Exercise of stock options
Stock-based compensation
Issuance of warrants
Unrealized gain on investments
Unrealized loss on foreign currency translation
Net loss

Balance, December 31, 2019

Issuance of Units in private offering, net of offering costs
Issuance of warrants
Issuance of common stock under equity incentive plans
Stock-based compensation
Unrealized loss on investments
Unrealized gain on foreign currency translation
Net loss

Balance, December 31, 2020

Issuance of common stock in Private Placement, net of
offering costs
Issuance of common stock to Horizon
Exchange of common stock for prefunded warrants
Stock-based compensation
Issuance of common stock under equity incentive plans
Unrealized loss on investments
Unrealized loss on foreign currency translation
Net loss

Common Stock

Treasury

Shares

13,854,205  $
4,706,700 
26,987 
— 

Amount
14 
5 
— 
— 

Shares

Amount

50,467  $
— 
— 
— 

—  $
— 
— 
— 

— 
— 
— 
18,587,892 
5,139,610 
— 
75,681 

— 
— 
— 
23,803,183 
6,489,357 

951,980 
(1,200,000)
— 
149,759 
— 
— 
— 

— 
— 
— 
19 
5 
— 
— 

— 
— 
— 
24 
6 

1 
(1)
— 
— 
— 
— 
— 
30 

— 
— 
— 
50,467 
— 
— 
— 

— 
— 
— 
50,467 
— 

— 
— 
— 
— 
— 
— 
— 

— 
— 
— 
— 
— 

— 
1,200,000 
— 
— 
— 
— 
— 

1,250,467  $

— 
— 
— 
— 
— 
— 
— 
—  $

Additional
Paid-in
Capital

Accumulated
Other
Comprehensive
(Loss) Gain

Accumulated
Deficit

Total
Stockholders’
Equity

90,664 
23,593 
13 
3,041 
60 
— 
— 
— 
117,371 
56,253 
60 
123 
4,140 
— 
— 
— 
177,947 
90,727

11,928 
1 
6,240 
502 
— 
— 
— 
287,345 

$

$

(13) $
— 
— 
— 

(46,074) $
— 
— 
— 

29 
(6)
— 
10 
— 
— 
— 

(15)
58 
— 
53 
— 

— 
— 
(41,852)
(87,926)
— 
— 
— 

— 
— 
(27,940)
(115,866)
— 

— 
— 
— 
— 
(238)
(88)
— 
(273) $

— 
— 
— 
— 
— 
— 
(50,333)
(166,199) $

44,591 
23,598 
13 
3,041 
60 
29 
(6)
(41,852)
29,474 
56,258 
60 
123 
4,140 
(15)
58 
(27,940)
62,158 
90,733 

11,929 
— 
6,240 
502 
(238)
(88)
(50,333)
120,903 

Balance, December 31, 2021

30,194,279  $

The accompanying notes are an integral part of these consolidated financial statements.

F-6

 
 
ALPINE IMMUNE SCIENCES, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)

Operating activities
Net loss
Adjustments to reconcile net loss to net cash used in operating activities:

2021

Years Ended December 31,
2020

2019

$

(50,333) $

(27,940) $

(41,852)

Loss on sale of property and equipment
Depreciation expense
Amortization of premium/discount on investments
Non-cash interest expense
Deferred income tax
Stock-based compensation expense
Changes in operating assets and liabilities:

Prepaid expenses and other current assets
Right-of-use asset
Accounts payable and accrued liabilities
Deferred revenue
Lease liabilities

Net cash (used in) provided by operating activities

Investing activities

Purchases of property and equipment
Purchase of investments
Maturities of investments
Proceeds from the sale of investments

Net cash (used in) provided by investing activities

Financing activities

Proceeds from sale of common stock and warrants, net of offering costs
Proceeds from issuance of common stock to Horizon
Proceeds from borrowings, net of issuance costs
Repayment of debt
Proceeds from exercise of stock options

Net cash provided by financing activities

Effect of exchange rate on cash, cash equivalents and restricted cash
Net increase in cash and cash equivalents and restricted cash
Cash and cash equivalents and restricted cash, beginning of period
Cash and cash equivalents and restricted cash, end of period

Supplemental Information

Recognition of right-of-use asset
Cash paid for interest
Discount in connection with issuance of debt

$

$
$
$

4 
620 
906 
274 
(214)
6,240 

(3,063)
564 
5,970 
24,628 
(844)
(15,248)

(118)
(133,518)
81,156 
— 
(52,480)

90,733 
11,929 
— 
(2,400)
502 
100,764 
(88)
32,948 
35,213 
68,161  $

—  $
554  $
—  $

5 
578 
103 
261 
— 
4,140 

255 
592 
(491)
51,540 
1,041 
30,084 

(802)
(101,328)
29,311 
— 
(72,819)

56,258 
— 
5,000 
— 
123 
61,381 
58 
18,704 
16,509 
35,213  $

—  $
490  $
334  $

16 
468 
(360)
140 
— 
3,041 

(408)
1,553 
816 
1,435 
(195)
(35,346)

(821)
(59,382)
75,575 
1,391 
16,763 

23,598 
— 
1,977 
(1,333)
13 
24,255 
(6)
5,666 
10,843 
16,509 

11,173 
170 
— 

 The accompanying notes are an integral part of these consolidated financial statements.

F-7

 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Description of Business

Alpine Immune Sciences, Inc. (the “Company”, “Alpine”, “we”, “us”, or “our”), together with its consolidated subsidiaries, is a clinical-stage
biopharmaceutical company dedicated to discovering and developing innovative, protein-based immunotherapies to treat cancer and autoimmune and
inflammatory diseases. Our approach includes a proprietary scientific platform that converts native immune system proteins into differentiated, multi-
targeted therapeutics. We believe our strategies are capable of meaningfully modulating the human immune system and significantly improving outcomes
in patients with serious diseases. We were incorporated under the laws of the State of Delaware and are headquartered in Seattle, Washington.

A novel strain of coronavirus, SARS-CoV-2 (“COVID-19”), was first reported in December 2019, and subsequently declared a global pandemic by

the World Health Organization in March 2020. As a result of the COVID-19 outbreak, many companies have experienced disruptions in their operations
and in markets served. We have implemented some and may take additional temporary precautionary measures intended to help ensure the well-being of
our employees and minimize business disruption. We considered the impact of COVID-19 on the assumptions and estimates used and determined that there
were no material adverse impacts to our results of operations and financial position at December 31, 2021. The full extent of the future impacts of the
continuing COVID-19 outbreak on our operations is uncertain and may adversely impact our business, including our clinical trials.

2. Summary of Significant Accounting Policies

Basis of Presentation and Use of Estimates

The accompanying consolidated financial statements have been prepared in accordance with the rules and regulations of the Securities and

Exchange Commission (“SEC”) and generally accepted accounting principles in the United States of America (“GAAP”). The preparation of financial
statements in conformity with GAAP requires management to make judgments, estimates and assumptions that affect the amounts reported in the
consolidated financial statements and accompanying notes. Significant estimates inherent in the preparation of the accompanying consolidated financial
statements include those used for revenue recognition, accruals for clinical trial activities and other accruals, and the estimated fair value of equity-based
awards. We base our estimates and assumptions on historical experience when available and on various factors we believe to be reasonable under the
circumstances. Actual results could differ materially from those estimates.

Principles of Consolidation

Our consolidated financial statements include the financial position and results of operations of Alpine Immune Sciences, Inc. and our wholly

owned operating company and subsidiary, AIS Operating Co., Inc., and our wholly-owned subsidiary, Alpine Immune Sciences Australia PTY LTD. All
inter-company balances and transactions have been eliminated in consolidation.

Segments

We operate as one operating segment and use cash flow as the primary financial measure to manage our business.

Cash and Cash Equivalents and Restricted Cash

We consider all highly liquid investments with an original maturity of 90 days or less at the time of purchase to be cash equivalents. Cash and cash

equivalents consist of deposits with commercial banks in checking and interest-bearing accounts, and highly liquid money market funds.

Restricted cash represents cash drawn on our line of credit used to establish collateral to support the security deposit on our operating lease to rent

office and laboratory space in Seattle, Washington.

Periodically, we maintain deposits in financial institutions in excess of government insured limits. We believe we are not exposed to significant

credit risk as our deposits, which are held at financial institutions, are high credit quality securities such as money market funds, U.S. Treasury securities,
and commercial paper. To date, we have not realized any losses on these deposits.

F-8

ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Investments

Our investments include funds invested in highly liquid money market funds, U.S. Treasury securities, commercial paper, and corporate debt

securities with a final maturity of each security of less than two years. These investments are classified as available-for-sale debt securities, which are
recorded at fair value based on quoted prices in active markets. We classify our investments maturing within one year of the reporting date as short-term
investments.

If the estimated fair value of a debt security is below its amortized cost basis, we evaluate whether it is more likely than not that we will sell the

security before its anticipated recovery in market value and whether credit losses exist for the related securities. A credit loss exists if the present value of
expected cash flows is less than the amortized cost basis of the security. Credit-related losses are recognized as an allowance for credit losses on the balance
sheet with a corresponding adjustment to earnings. Unrealized gains and losses that are unrelated to credit deterioration are reported in other comprehensive
income (loss). Purchase premiums and discounts are recognized as interest income using the interest method over the terms of the securities. Realized gains
and losses and declines in fair value deemed to be other than temporary are reflected in the Consolidated Statements of Operations and Comprehensive
Income (Loss) using the specific-identification method.

Property and Equipment

Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is recorded using the straight-line method over the

estimated useful lives of the assets, generally three to five years, while leasehold improvements are amortized over the shorter of their estimated useful
lives or the related lease term. Upon retirement or sale, the cost of assets disposed of and the related accumulated depreciation are removed from the
accounts and any resulting gain or loss is credited or charged to operations. Maintenance and repairs are expensed as incurred. Major improvements are
capitalized as additions to property and equipment.

Impairment of Long-lived Assets

We evaluate our long-lived tangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of such

assets may not be recoverable. If the carrying value exceeds the undiscounted future cash flows estimated to result from the use and eventual disposition of
the asset, we write down the asset to its estimated fair value. Impairment is assessed by comparing the undiscounted cash flows expected to be generated by
the asset to its carrying value. We did not record any impairments in the years ended December 31, 2021, 2020 or 2019.

Accrued Liabilities

As part of the process of preparing our consolidated financial statements, we are required to estimate accruals for professional services and research

and development expenses. This process involves reviewing contracts and vendor agreements and communicating with applicable personnel to identify
services that have been performed on our behalf. We estimate the level of service performed and the associated cost incurred for the service when we have
not yet been invoiced or otherwise notified of the actual cost. We estimate accrued liabilities as of each balance sheet date based on known facts and
circumstances.

Although we do not expect our estimates to be materially different from amounts actually incurred, if our estimates of the status and timing of

services performed differ from the actual status and timing of services performed, we may report amounts that are too high or too low in any particular
period. To date, we have not experienced any significant adjustments to our estimates.

Leases

We account for our leases under Accounting Standards Codification (“ASC”) 842, Leases. Under this guidance, we applied the practical expedients
regarding the identification of leases, lease classification, indirect costs, and the combination of lease and non-lease components. Arrangements meeting the
definition of a lease are classified as operating or financing leases, and are recorded on the consolidated balance sheet as both a right-of-use asset and lease
liability, calculated by discounting fixed lease payments over the lease term at the rate implicit in the lease or our incremental borrowing rate. As we do not
know the lessor’s implicit rate, we use our incremental borrowing rate at the commencement date of the lease in determining the present value of lease
payments. Lease liabilities are increased by interest and reduced by payments each period, and the right-of-use asset is amortized over the lease term. For
operating leases, interest on the lease liability and the amortization of the right-of-use asset result in straight-line rent expense over the lease term. For
finance leases, interest on the lease liability and the amortization of the right-of-use asset results is front-loaded expense over the lease term. Variable lease
expenses are recorded when incurred.

F-9

ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

In calculating the right-of-use asset and lease liability, we elected to combine lease and non-lease components. We exclude short-term leases having
initial terms of 12 months or less from the new guidance as an accounting policy election, and recognize rent expense on a straight-line basis over the lease
term.

Derivative Financial Instruments

We evaluate all of our financial instruments, including prefunded warrants and warrants to purchase common stock, to determine if such instruments

are derivatives or contain features qualifying as embedded derivatives. For derivative financial instruments accounted for as liabilities, the derivative
instrument is initially recorded at its fair value and is then re-valued at each reporting date, with changes in the fair value reported in the Consolidated
Statements of Operations and Comprehensive Income (Loss). We use the Black-Scholes option-pricing model to value the derivative instruments at
inception and subsequent valuation dates. The classification of derivative instruments, including whether such instruments should be recorded as liabilities
or as equity, is re-assessed at the end of each reporting period. We do not use derivative instruments to hedge exposures to cash flow, market, or foreign
currency risks.

Revenue Recognition

Revenue is recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration

we expect to be entitled to in exchange for those goods or services. Our steps for recognizing revenue consist of; (1) identifying the contract, (2) identifying
the performance obligations as either distinct or bundled goods and services, (3) determining the transaction price associated with each performance
obligation for which we expect to be entitled in exchange for transferring such goods and services, (4) allocating the transaction price to the performance
obligations in the contract and (5) recognizing revenue upon satisfaction of performance obligations.

Our collaboration agreements principally contain multiple performance obligations, which may include (1) grants of, or options to obtain,

intellectual property licenses; (2) research and development services; and/or (3) manufacturing or supply services. Payments typically received under these
arrangements include one or more of the following: non-refundable upfront license fees, option exercise fees, payment for research and/or development
efforts, amounts due upon the achievement of specified objectives, and/or royalties on future product sales. Our revenue is primarily derived from our
collaboration agreements with Adaptimmune Therapeutics plc (“Adaptimmune”), AbbVie Ireland Unlimited Company (“AbbVie”), and Horizon
Therapeutics Ireland DAC (“Horizon”). See further discussion of our collaboration agreements in Note 11.

We allocate revenue to each performance obligation based on its relative stand-alone selling price. We generally determine stand-alone selling prices

at the inception of the contract based on our best estimate of what the selling price would be if the deliverable was regularly sold by us on a stand-alone
basis. Payments received prior to satisfying the relevant revenue recognition criteria are recorded as deferred revenue in the accompanying Consolidated
Balance Sheets and recognized as revenue when the related revenue recognition criteria are met. We recognize revenue under our collaboration agreements
by using a cost-based input method to measure progress toward completion of the performance obligation, including employee hours contributed to each
performance obligation, and to calculate the corresponding revenue to recognize each period.

Our collaboration agreements provide for non-refundable milestone payments. We recognize revenue that is contingent upon the achievement of a

substantive milestone in its entirety in the period in which the milestone is achieved. A milestone is considered substantive when the consideration payable
to us for such milestone (1) is consistent with our performance necessary to achieve the milestone or the increase in value to the collaboration resulting
from our performance; (2) relates solely to our past performance; and (3) is reasonable relative to all of the other deliverables and payments within the
arrangement. In making this assessment, we consider all facts and circumstances relevant to the arrangement, including factors such as the scientific,
regulatory, commercial, and other risks that must be overcome to achieve the milestone, the level of effort and investment required to achieve the milestone
and whether any portion of the milestone consideration is related to future performance or deliverables.

We review the contributed employee hours and progress towards completion for each performance obligation under our collaboration agreements,

and adjust the revenue recognized to reflect changes in assumptions relating to the estimated satisfaction of the performance obligation. Revenue
recognition may be accelerated in the event of early termination of programs or if our expectations change. Alternatively, revenue recognition may be
decelerated if programs are extended or delayed. While such changes to our estimates have no impact on our reported cash flows, the timing of revenue
recorded in future periods could be materially impacted.

Research and Development

Research and development costs are expensed as incurred. Research and development costs include personnel costs, clinical trials, external contract

research and development expenses, raw materials, drug product manufacturing costs and

F-10

ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

allocated overhead – including depreciation, rent and utilities. Research and development costs that are paid in advance of performance are capitalized as a
prepaid expense and amortized over the service period as the services are provided.

Stock-based Compensation

Stock-based compensation is recognized for all share-based payments based on the estimated fair value as of the date of grant. The fair value of our
stock options is calculated using the Black-Scholes option pricing model, which requires judgmental assumptions including volatility, risk-free interest rate,
expected term and dividend yield. The fair value of restricted stock units (“RSUs”) is based on the closing price of our common stock on the award date.
Stock-based compensation is recognized over the requisite service period of the awards, usually the vesting period, on a straight-line basis. For
performance-based awards where the vesting of the options may be accelerated upon the achievement of certain milestones, the related stock-based
compensation is recognized as expense when it is probable the milestone will be met. We recognize forfeiture of awards as they occur rather than
estimating the expected forfeiture rate.

Income Taxes

Income taxes are accounted for using an asset and liability approach that requires the recognition of deferred tax assets and liabilities for the
expected future tax consequences of temporary differences between the consolidated financial statement and tax bases of assets and liabilities at the
applicable enacted tax rates. We will establish a valuation allowance for deferred tax assets if it is more likely than not that these items will expire before
we are able to realize their benefits or that future deductibility is uncertain.

We recognize the tax benefit from uncertain tax positions only if it is more likely than not that the tax position will be sustained on examination by

the tax authorities, based on the technical merits of the position. The tax position is measured based on the largest benefit that has a greater than 50%
likelihood of being realized upon ultimate settlement. We recognize interest and penalties related to income tax matters in income tax expense if incurred.

Comprehensive Income (Loss)

Comprehensive income (loss) is comprised of net loss and certain changes in equity excluded from net loss. For the years ended December 31,

2021, 2020, and 2019, other comprehensive loss consisted of unrealized gains and losses on our investments and unrealized gains and losses on foreign
currency translation.

Foreign Currency Translation

Our wholly-owned Australian subsidiary uses the Australian dollar as its functional currency. All assets and liabilities related to this subsidiary are

translated using period-end exchange rates and revenues and expenses are translated at average exchange rates for the year. Translation adjustments are
included as components of comprehensive income (loss) in the Consolidated Statements of Operations and Comprehensive Income (Loss).

Recently Adopted Accounting Pronouncements

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2019-12, Income Taxes

(“Topic 740”): Simplifying the Accounting for Income Taxes. This ASU simplifies the accounting for income taxes by removing certain exceptions to the
general principles in Topic 740 and also improves consistent application by clarifying and amending existing guidance. The standard is effective for fiscal
years and interim periods within those fiscal years, beginning after December 15, 2020. We adopted this standard on January 1, 2021, and concluded that
the adoption of the standard did not have a material impact on our consolidated financial statements and related disclosures.

3. Net Loss Per Share

Basic net loss per share is computed by dividing net loss by the weighted-average number of common shares outstanding during the period.

The net loss per share for the year ended December 31, 2021 reflects 6,489,357 shares of our common stock issued pursuant to a private placement
financing completed in September 2021 and 951,980 shares of our common stock issued in December 2021 pursuant to a private placement financing with
Horizon. The net loss per share for the year ended December 31, 2020 reflects 5,139,610 shares of our common stock issued pursuant to the securities
offering completed in July 2020. The net loss per share for the year ended December 31, 2019 reflects 4,706,700 shares of our common stock issued
pursuant to a private placement financing completed in January 2019. The increased number of shares issued in these periods has affected the year-over-
year comparability of our net loss per share calculations.

F-11

ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

The common stock issuable upon the conversion or exercise of the following dilutive securities has been excluded from the diluted net loss per

share calculation because their effect would have been anti-dilutive. Diluted net loss per share, therefore, does not differ from basic net loss per share for
the periods presented.

Common stock warrants
Prefunded warrants to purchase common stock
Stock options and RSUs outstanding
Total

4. Cash Equivalents and Investments

2021
3,666,435 
5,182,197 
5,877,309 
14,725,941 

December 31,
2020
3,673,551 
790,710 
4,175,345 
8,639,606 

2019
1,877,094 
— 
3,252,144 
5,129,238 

The amortized cost and fair value of our cash equivalents and investments are as follows (in thousands):

Money market funds
U.S. treasury bills
Corporate debt securities and commercial paper
Total

Classified as:

Cash equivalents
Short-term investments
Long-term investments

Total

Money market funds
U.S. treasury bills
Corporate debt securities and commercial paper
Total

Classified as:

Cash equivalents
Short-term investments
Long-term investments

Total

Amortized
Cost

50,277  $
30,006 
117,492 
197,775  $

Amortized
Cost

28,424  $
18,122 
82,047 
128,593  $

$

$

$

$

December 31, 2021

Gross
unrealized
gains

Gross
unrealized
losses

Fair market
value

—  $
1 
2 
3  $

—  $

(100)
(139)
(239) $

$

$

50,277 
29,907 
117,355 
197,539 

50,277 
94,396 
52,866 
197,539 

December 31, 2020

Gross
unrealized
gains

Gross
unrealized
losses

Fair market
value

—  $
8 
2 
10  $

—  $
— 
(9)
(9) $

$

$

28,424 
18,130 
82,040 
128,594 

32,423 
70,622 
25,549 
128,594 

All investments held as of December 31, 2021 and 2020 were classified as available-for-sale debt securities and had contractual maturities of less

than two years. There were no realized gains and losses on these securities for the periods presented. The aggregate fair value of available-for-sale debt
securities in an unrealized loss position as of December 31, 2021 was $83.0 million. We did not have any investments in a continuous unrealized loss
position for more than twelve months as of December 31, 2021. Our available-for-sale debt securities are invested in highly liquid funds with high credit
ratings that have a final maturity of two years or less on the date of purchase. Unrealized losses on these investments were primarily due to changes in
interest rates. We evaluated our investments that are in an unrealized loss position and believe it is more likely than not that we will hold these investments
until maturity and will recover the amortized cost basis of these investments.

F-12

 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

5. Fair Value Measurements

Cash and cash equivalents, restricted cash, receivables, accounts payable and accrued liabilities, which are recorded at invoiced amount or cost,
approximate fair value based on the short-term nature of these financial instruments. Fair value is defined as the exchange price received for an asset or
paid to transfer a liability, or an exit price, in the principal or most advantageous market for the asset or liability in an orderly transaction between market
participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of
unobservable inputs. The three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value, is as follows:

Level 1: Quoted prices in active markets for identical assets or liabilities.

Level 2: Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in inactive markets, or other

inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3: Unobservable inputs supported by little or no market activity and significant to the fair value of the assets or liabilities.

As of December 31, 2021 and 2020, cash of $17.6 million and $2.5 million, respectively, is excluded from the fair value table below. The following

tables summarize our financial assets and liabilities measured at fair value on a recurring basis (in thousands):

Assets:

Money market funds
U.S. treasury bills
Corporate debt securities and commercial paper
Total

Assets:

Money market funds
U.S. treasury bills
Corporate debt securities and commercial paper
Total

Level 1

Level 2

Level 3

Total

December 31, 2021

50,277  $
29,907 
— 
80,184  $

—  $
— 
117,355 
117,355  $

—  $
— 
— 
—  $

50,277 
29,907 
117,355 
197,539 

Level 1

Level 2

Level 3

Total

December 31, 2020

28,424  $
18,130 
— 
46,554  $

—  $
— 
82,040 
82,040  $

—  $
— 
— 
—  $

28,424 
18,130 
82,040 
128,594 

$

$

$

$

Our Level 2 assets consist of commercial paper and corporate debt securities. We review trading activity and pricing for our available-for-sale

securities as of the measurement date. When sufficient quoted pricing for identical securities is not available, we use market pricing and other observable
market inputs for similar securities obtained from various third-party data providers. These inputs either represent quoted prices for similar assets in active
markets or have been derived from observable market data.

6. Property and Equipment

Property and equipment, net, consists of the following (in thousands):

Laboratory equipment
General equipment and furniture
Computer equipment and software
Leasehold improvements
Property and equipment, at cost

Less accumulated depreciation and amortization

Property and equipment, net

F-13

December 31,

2021

2020

3,132  $
479 
211 
85 
3,907 
(2,191)
1,716  $

2,604 
479 
211 
85 
3,379 
(1,594)
1,785 

$

$

 
 
 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Depreciation expense was $620,000, $578,000 and $468,000 for the years ended December 31, 2021, 2020 and 2019, respectively.

7. Sale of Intangible Asset

In February 2018, we entered into an Option License Agreement (“Option Agreement”) with Laurel Venture Capital Ltd. (“Laurel”), which granted

Laurel a limited license to evaluate the indefinite-life GSNOR inhibitor IPR&D asset acquired as part of the merger with Nivalis in 2017. The IPR&D
represents the processes, expertise, and technology employed in the development of GSNOR inhibitors and Nivalis’ lead product candidate, cavosonstat.
Under the Option Agreement, we received an upfront non-refundable payment of $75,000, which was recognized as revenue in our accompanying
Consolidated Statements of Operations and Comprehensive Income (Loss).

In June 2018, we entered into an Asset Purchase Agreement (“Purchase Agreement”) with Laurel and completed the sale of global rights to the

GSNOR asset. Upon the sale of the GSNOR assets, we derecognized the full carrying value of the intangible asset. As consideration under the Purchase
Agreement, we received a non-refundable closing payment of $250,000, which was accounted for as a purchase of our intangible asset. In June 2019, we
recognized as revenue an additional payment of $425,000, related to the asset purchase. In addition, we are eligible to receive milestone payments of up
to $20.0 million, in the aggregate upon satisfaction by Laurel of certain regulatory approval milestones. We will also be eligible to receive royalty payments
equal to a low single-digit percentage rate of worldwide net sales of any approved products.

8. Additional Balance Sheet Information

Prepaid expenses and other current assets consist of the following (in thousands):

Prepaid research and development
Prepaid insurance
Deferred financing
Tenant improvement allowance receivable
Prepaid other
Other receivables

Prepaid expenses and other current assets

Accrued liabilities consist of the following (in thousands):

Research and development services
Employee compensation
Legal and professional fees
Accrued taxes
Accrued other
Accrued Liabilities

9. Long-term Debt

December 31,

2021

2020

3,315 
454 
352 
— 
266 
323 
4,710 

$

$

December 31,

2021

2020

5,536 
3,084 
394 
127 
276 
9,417 

$

$

517 
447 
— 
84 
168 
304 
1,520 

2,571 
2,619 
482 
— 
105 
5,777 

$

$

$

$

In December 2016, we entered into a Loan and Security Agreement (the “Original Agreement”), with Silicon Valley Bank (“SVB”), under which

we borrowed $5.0 million. The Original Agreement accrued interest at a floating per annum rate equal to the lender’s prime rate minus 1.75%. The Original
Agreement had an interest-only period through July 2018.

In August 2019 (the “Effective Date”), we entered into an Amended and Restated Loan and Security Agreement (the “Loan Agreement”) with SVB,
pursuant to which SVB agreed to extend term loans to us with an aggregate principal amount of up to $15.0 million (the “Term Loans”). Borrowings under
the Loan Agreement consisted of up to three separate tranches. The initial tranche of $5.0 million was funded in August 2019, $3.0 million of which was
used to repay amounts owing under our Original Agreement. In March 2020, the second tranche of $5.0 million was funded to us. We did not draw down
the final tranche of $5.0 million, which expired on July 31, 2020. We intend to use the debt proceeds for working capital and other general corporate
purposes, including the advancement of our development programs.

F-14

 
 
 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

The Term Loans accrue interest at a floating per annum rate of 0.25% above the prime rate, subject to a floor of 5.75%, which interest is payable
monthly commencing in September 2019. Upon the occurrence and during the continuance of an event of default, a default interest rate will apply that is
4.0% above the otherwise applicable interest rate. The Term Loans were interest only until September 30, 2020, however, under the Loan Agreement our
interest only period automatically extended to June 30, 2021 if we received aggregate new capital of at least $40.0 million no later than June 30, 2020. We
met this milestone in June 2020 in conjunction with the execution of the AbbVie agreement, discussed in detail in Note 11. As a result of the interest only
extension, the Term Loans will be payable in 25 equal monthly installments of principal plus interest, with the final installment due and payable on July 1,
2023.

We may prepay all of the Term Loans subject to a prepayment fee equal to $75,000, which represents the deferred portion of the final payment due
under the Original Agreement, plus the outstanding principal balance under the Term Loans at the time of such prepayment multiplied by a prepayment fee
of 2.0% in the first year, 1.0% in the second year, and 0% in the third year and thereafter. Additionally, a final payment in the amount of 5.5% of the funded
Term Loans is payable to SVB on the date on which the Term Loans are prepaid, paid or become due and payable in full. The final payment fees are
recorded in long-term debt with an offsetting reduction to debt discount on our accompanying Consolidated Balance Sheets.

The Loan Agreement contains customary representations and warranties, events of default and affirmative and negative covenants, including,
among others, covenants that limit or restrict our ability to, among other things, incur additional indebtedness, grant liens, merge or consolidate, make
acquisitions, pay dividends or other distributions or repurchase equity, make investments, dispose of assets, engage in any new lines of business, and enter
into certain transactions with affiliates, in each case subject to certain exceptions. We assessed the likelihood of the lender accelerating payment of the loan
due to a material adverse change in our business, operations, financial, or other condition as remote. We were in compliance with our covenants as of
December 31, 2021. As such, as of December 31, 2021, the classification of the loan is split between current and noncurrent based on the timing of
payment obligations. As security for its obligations under the Loan Agreement, we granted SVB a first priority security interest on substantially all of our
assets, except intellectual property, and subject to certain other exceptions.

In connection with the Loan Agreement, we issued a warrant to SVB to purchase up to 52,083 shares of our common stock at a price of $4.32 per
share, 17,361 shares of which became exercisable in August 2019 after we drew down the initial tranche. In March 2020, after we drew down the second
tranche of our Term Loan, an additional 17,361 shares became exercisable. The remaining warrants did not vest and expired on July 31, 2020, upon the
expiration of the third tranche of our Term Loan. The fair value of the warrants on the date of issuance for the initial tranche and second tranche
was $60,000 and $60,000, respectively, determined using the Black-Scholes option-pricing model, and was recorded as a component of equity and as a debt
discount on our accompanying Consolidated Balance Sheets. In connection with Original Agreement, SVB also holds 7,069 fully vested common stock
warrants at an exercise price of $12.38 per share. 

The Term Loan was accounted for as a debt modification in a non-troubled debt restructuring, rather than a debt extinguishment, based on a

comparison of the present value of the cash flows under the terms of the debt immediately before and after the Effective Date of the Term Loan, which
resulted in a change of less than 10%. As a result, the remaining unamortized debt discount recorded in connection with the Original Agreement will be
amortized to interest expense over the repayment term of Loan Agreement. In connection with the initial and second tranches of the Loan Agreement, we
recorded a total debt discount of $812,000, which is being amortized to interest expense using the effective interest method over the repayment term of the
loan. Non-cash interest expense associated with the amortization of the discount was $274,000, $261,000, and $140,000, for years ended December 31,
2021, 2020, and 2019, respectively. The unamortized discount was $223,000 as of December 31, 2021.

Scheduled principal payments on our outstanding debt as of December 31, 2021 under our Loan Agreement, excluding final fee amounts, are as

follows (in thousands):

Year Ending December 31,

2022
2023

Total future principal payments

Total

4,800 
2,800 
7,600 

$

$

F-15

ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

10. Commitments and Contingencies

Operating Leases

We leased office and laboratory space located at 201 Elliott Avenue West, in Seattle, Washington, under an agreement classified as an operating

lease that expired on December 31, 2019. In May 2017, as required by the terms of the lease, we entered into a line of credit to establish collateral to
support the security deposit in an amount of $132,000, which was recorded as current restricted cash in our Consolidated Balance Sheets for the year ended
December 31, 2019.

In March 2019, we entered into a lease for office and laboratory space located at 188 East Blaine Street, Seattle, Washington. The term of the lease
is 10.8 years with one option to extend the term by 5.0 years. Our option to extend the rental term of our lease was not considered reasonably certain as of
December 31, 2021. The lease term commenced in June 2019. The “Rent Commencement Date” began in March 2020, nine months after the
commencement date. The annual base rent under the lease is $1.7 million for the first year and will increase by 3.0% each year thereafter. We were not
required to pay base rent from the Rent Commencement Date through November 2020, the last day of the ninth month following the Rent Commencement
Date. We received a tenant improvement allowance of $5.4 million, which is included in our base rent, and a maximum additional tenant improvement
allowance of $1.8 million, which will result in additional rent amortized over the term of the lease at an annual rate of 8.0%. The lease also requires us to
pay additional amounts for operating and maintenance expenses. In March 2019, in connection with the lease, we provided a $254,000 letter of credit as a
security deposit, which is recorded as noncurrent restricted cash in our accompanying Consolidated Balance Sheets.

As of December 31, 2021, our operating lease right-of-use assets and operating lease liability associated with our leases were $8.8 million and $11.6

million, respectively. Supplemental operating lease information for the year ended December 31, 2021 was as follows (in thousands):

Operating lease cost
Variable lease cost
Total lease cost

Other information:

Cash paid for amounts included in the measurement of lease liabilities
Weighted-average remaining lease term (years)
Weighted-average discount rate

$

$

$

For the Year Ended December 31,

2021

2020

1,837
603
2,440

$

$

2,117  $
8.2
10.7%

1,872
475
2,347

213
9.2
10.7%

Variable lease costs represent our share of the landlord’s operating expenses. We do not act as a lessor or have any leases classified as financing

leases. Maturities of our operating lease liabilities as of December 31, 2021 are as follows (in thousands):

2022
2023
2024
2025
2026
Thereafter

Total future minimum lease payments

Less: imputed interest

Operating lease liabilities

Contingencies

Minimum Lease
Payments

$

$

1,841 
2,057 
2,111 
2,167 
2,224 
7,438 
17,838 
(6,212)
11,626 

Certain credits received related to our research and development expenditures and recorded within other income in our accompanying Consolidated

Statements of Operations and Comprehensive Income (Loss) are subject to review by foreign taxing authorities. It is reasonably possible we may incur
losses upon the completion of these reviews ranging from $0 to $1.8 million, which we could be required to repay to certain tax authorities.

F-16

 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

11. License and Collaboration Agreements

Horizon

In December 2021, we entered into an exclusive license and collaboration agreement with Horizon (the “Horizon Agreement”) for the development

and commercialization of up to four preclinical candidates generated from our unique discovery platform. The agreement includes licensing of one of our
existing preclinical biologic therapeutic programs (the “Existing Program”), as well as a research partnership to jointly develop candidates for up to three
additional autoimmune and inflammatory disease programs for other designated biological targets, (the “Research Programs”). These candidates include
previously undisclosed multi-specific fusion protein-based therapeutic candidates for autoimmune and inflammatory diseases. We will advance candidate
molecules to predefined preclinical milestones while Horizon will be responsible for the respective costs and, ultimately, Horizon will assume
responsibility for development and commercialization activities and costs.

In connection with the execution of the Horizon Agreement in December 2021, we entered into a stock purchase agreement under which Horizon
purchased 951,980 shares of our common stock in a private placement for approximately $15.76 per share and aggregate proceeds of $15.0 million. The
shares were sold at a 25% premium to the volume-weighted average share price of our common stock for a specified 30-day period prior to entering into
the agreement. The fair value of the common stock issued to Horizon of $11.9 million was recorded to equity, based on the closing price of common stock
on the effective date of the Horizon Agreement. For accounting purposes, the $3.1 million difference between the cash proceeds and the fair value of the
common stock was treated as additional consideration attributable to the Horizon Agreement.

Under the terms of the agreements, Horizon also paid us a non-refundable upfront payment of $25.0 million in the first quarter of 2022. In addition,

we are eligible to receive up to $381.0 million per program, or up to approximately $1.5 billion in total, in future success-based payments related to
development, regulatory and commercial milestones. Furthermore, we are eligible to receive tiered royalties from a mid-single digit percentage to a low
double-digit percentage on global net sales.

As of December 31, 2021, we recorded on our accompanying Consolidated Balance Sheets $28.1 million in current and noncurrent deferred

revenue, of which $25.0 million relates to accounts receivable for the up-front payment and $3.1 million relates to the premium paid by Horizon on the
stock issuance. As work under the Horizon license and collaboration agreement did not begin until 2022, we did not recognize any related revenue for the
year ended December 31, 2021.

For revenue recognition purposes, we determined that the Existing Program and each Research Program are distinct performance obligations. We

allocated revenue to each performance obligation based on its relative stand-alone selling price. The future success-based payments related to development
and regulatory milestones are probable of significant revenue reversal as the achievement is highly dependent on factors outside our control. Therefore,
these milestone payments are fully constrained and are not initially included in the transaction price. We will continue to re-evaluate the transaction price
each reporting period and update as uncertain events are resolved or other changes in circumstances occur. Any consideration related to commercial
milestones and royalties will be recognized when the related sales occur.

AbbVie

In June 2020, we entered into an option and license agreement with AbbVie (the “AbbVie Agreement”) for the development of ALPN-101
(“acazicolcept”). The AbbVie Agreement grants AbbVie the exclusive option to purchase an exclusive worldwide license to acazicolcept (the “License
Option”). The License Option is exercisable by AbbVie at any time and will expire 90 days from the achievement of certain development milestones. If
AbbVie exercises the License Option, AbbVie will take over the future development and commercialization. Prior to the exercise of the License Option, we
will perform research and development services, including conducting a Phase 2 study in systemic lupus erythematosus, based on an agreed-upon
development plan (the “Development Plan”). We will be fully responsible for all costs incurred to conduct the activities under the Development Plan,
provided that, AbbVie may be responsible for increased costs under the Development Plan in connection with certain material amendments proposed by
AbbVie. We will also be solely responsible, at our sole cost and expense, for manufacturing and regulatory filings for acazicolcept necessary to complete
activities under the Development Plan.

In June 2020, in connection with the execution of the AbbVie Agreement, AbbVie paid us a nonrefundable upfront payment of $60.0 million. Prior

to the exercise of the License Option, AbbVie has agreed to make cash payments upon our achievement of certain predefined pre-option development
milestones (the “Alpine Development Milestones”) up to an aggregate amount of $75.0 million. In the second quarter of 2021, we achieved $45.0 million
of the Alpine Development Milestones. If AbbVie exercises the License Option, they will pay a one-time cash payment of $75.0 million. Following the
exercise of the License Option, AbbVie has also agreed to make aggregate cash payments of up to $205.0 million upon AbbVie’s achievement of certain
development and commercial milestones and additional aggregate cash payments of up to $450.0 million upon AbbVie’s achievement of certain sales-
based cash milestones, collectively referred to as (the “AbbVie

F-17

ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Milestones”). Subsequent to commercialization, we are also eligible to receive high single-digit to low double-digit percentage royalties on worldwide net
sales of licensed products.

For revenue recognition purposes, we determined that our contractual promises in the AbbVie Agreement are not distinct and are interdependent
with our performance obligation to provide research and development services under the Development Plan. Thus, all contractual promises related to the
upfront payment and Alpine’s Development Milestones were combined into a single performance obligation. We determined the Alpine Development
Milestone payments are probable of significant revenue reversal as the achievement is highly dependent on factors outside our control. Therefore, these
milestone payments were fully constrained and were not initially included in the transaction price. In June 2021, we re-evaluated and updated the
transaction price to include the achieved portion of the Alpine Development Milestones. We will continue to re-evaluate the transaction price each
reporting period and update as uncertain events are resolved or other changes in circumstances occur.

The License Option and the AbbVie Milestones were not determined to be performance obligations at the inception of the contract as they did not

represent material rights. If exercised, the License Option and AbbVie Milestones will be accounted for as a separate contract and will be recognized as
revenue if and when triggered. Any consideration related to sales-based royalties and profit-sharing payments will be recognized when the related sales
occur.

We use a cost-based input method to measure progress toward completion of the performance obligation and to calculate the corresponding revenue
to recognize each period. In applying the cost-based input, we use actual costs incurred relative to budgeted costs for the combined performance obligation.
These costs consist primarily of internal personnel efforts and third-party contract costs relative to the level of patient enrollment in the study. Revenue will
be recognized based on the level of costs incurred relative to the total budgeted costs for the performance obligation. A cost-based input method of revenue
recognition requires management to make estimates of costs to complete our performance obligation. In making such estimates, significant judgment is
required to evaluate assumptions related to cost estimates. The cumulative effect of revisions to estimated costs to complete our performance obligation
will be recorded in the period in which changes are identified and amounts can be reasonably estimated. A significant change in these assumptions and
estimates could have a material impact on the timing and amount of revenue recognized in future periods.

We recognized revenue from the AbbVie Agreement of $23.4 million and $7.0 million for the years ended December 31, 2021 and 2020,
respectively. As of December 31, 2021 the remaining balance of the transaction price is $74.5 million and is recorded as current and noncurrent deferred
revenue on our accompanying Consolidated Balance Sheets. We expect to recognize the remaining deferred revenue over the remainder of our
Development Plan, which began in June 2020 and ends upon the later of the exercise or expiration of the option.

Adaptimmune

In May 2019, we entered into a collaboration and licensing agreement with Adaptimmune (the “Adaptimmune Agreement”) to develop next-
generation SPEAR T cell products. Under the Adaptimmune Agreement, we are to perform certain research services and grant Adaptimmune an exclusive
license to programs from our secreted immunomodulatory protein (“SIP”) and transmembrane immunomodulatory protein (“TIP”) technologies. In June
2019, under the terms of the Adaptimmune Agreement, we received an upfront license payment of $2.0 million, and through December 31, 2021 we have
received an additional $1.6 million in research support payments to fund ongoing programs. These payments were recorded as deferred revenue upon
receipt and were recognized to revenue based on employee hours contributed to each performance obligation. In the fourth quarter of 2020, based on the
completion of our initial research and development efforts in connection with our performance obligations, we recognized the remaining balance in
deferred revenue associated with Adaptimmune on our accompanying Consolidated Balance Sheets. Under the Adaptimmune Agreement we recognized no
revenue for the year ended December 31, 2021, and $2.3 million and $1.3 million for the years ended December 31, 2020, and 2019, respectively. In
addition, we are eligible for additional research support payments, one-time payments and downstream development and commercialization milestones of
up to $288.0 million, if all pre-specified milestones for each program are achieved. We are also eligible to receive low-single digit royalties on worldwide
net sales of the applicable products. In February 2022, Adaptimmune selected an additional research program, triggering a $1.0 million upfront payment,
which will be recorded as deferred revenue upon receipt and recognized to revenue based on employee hours contributed.

F-18

ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

12. Stockholders’ Equity

Common Stock

Shares of common stock reserved for future issuance were as follows:

Shares to be issued upon exercise of outstanding stock options
Shares to be issued upon release of RSUs
Shares to be issued upon conversion of common stock warrants
Shares to be issued upon conversion of prefunded warrants
Shares available for future stock grants
Shares to be issued under employee stock purchase plan
Shares of common stock reserved for future issuance

Securities Offerings

December 31,

2021
5,611,743 
265,566 
3,666,435 
5,182,197 
284,906 
45,211 
15,056,058 

2020
4,175,345 
— 
3,673,551 
790,710 
887,901 
45,211 
9,572,718 

In September 2021, we entered into a securities purchase agreement (the “2021 Securities Purchase Agreement”) for a private placement with a

select group of institutional investors, pursuant to which we sold 6,489,357 shares of our common stock (the “Shares”) and prefunded warrants to purchase
3,191,487 Shares (the “Prefunded Warrants”). The purchase price for each Share and for each Prefunded Warrant was $9.40 per share, for an aggregate
purchase price of approximately $91.0 million. The Prefunded Warrants became fully exercisable upon the closing date and have an exercise price of
$0.001 per share. We incurred $266,000 in financing costs associated with the 2021 Securities Purchase Agreement, which was netted against the proceeds
within additional-paid-in-capital on our accompanying Consolidated Balance Sheets.

In September 2021, we entered into an exchange agreement (the “Exchange Agreement”) with Frazier Life Sciences VIII, L.P. (the “Exchanging

Stockholder”), which Exchanging Stockholder is affiliated with a member of our board of directors, pursuant to which we exchanged an aggregate of
1,200,000 shares of common stock held by the Exchanging Stockholder for Prefunded Warrants (the “Exchange Warrants”) to purchase an aggregate of
1,200,000 shares of common stock. Upon the closing of the exchange, we reclassified 1,200,000 shares of common stock into treasury stock on our
accompanying Consolidated Balance Sheets.

In July 2020, we entered into a securities purchase agreement (the “2020 Securities Purchase Agreement”) for a private placement with a select

group of institutional investors, pursuant to which we sold 5,139,610 units (the “Common Units”) and 790,710 units (the “Prefunded Warrant Units”), for
an aggregate purchase price of $60.0 million. Each Common Unit consists of one share of our common stock plus a warrant to purchase 0.3 shares of
common stock (the “Common Stock Warrants”), and each Prefunded Warrant Unit consists of one prefunded warrant to purchase one share of common
stock plus 0.3 Common Stock Warrants. The Prefunded Warrant Units and the Common Units are collectively referred to as the “Units” and each Unit has
a purchase price of $10.1175. Pursuant to the terms of the 2020 Securities Purchase Agreement, we issued warrants to purchase 1,779,096 shares of
common stock with an exercise price of $12.74 and a term of 3.5 years. Additionally, we issued 790,710 prefunded warrants, which became fully
exercisable upon the closing date and have an exercise price of $0.001 per share. We incurred $3.7 million in financing costs associated with the 2020
Securities Purchase Agreement, which was netted against the proceeds within additional-paid-in-capital on our accompanying Consolidated Balance
Sheets.

In January 2019, we entered into a securities purchase agreement (the “2019 Securities Purchase Agreement”) with a limited number of accredited

investors, pursuant to which we sold 4,706,700 units (the “2019 Units”) for an aggregate purchase price of $25.3 million in a private placement (the
“Private Placement”). Each 2019 Unit has a purchase price of $5.37 and consists of one share of our common stock and a warrant to purchase 0.39 shares
of common stock. Pursuant to the terms of the 2019 Securities Purchase Agreement, we issued 4,706,700 shares of common stock and warrants to purchase
an aggregate of 1,835,610 shares of common stock. The warrants have an exercise price of $12.74 and have a term of five years. We incurred $1.7 million
in financing costs associated with the 2019 Securities Purchase Agreement, which was netted against the proceeds within additional-paid-in-capital on our
accompanying Consolidated Balance Sheets.

The issuance of the securities sold under the 2021, 2020, and 2019 Securities Purchase Agreements have not been registered under the Securities

Act of 1933, as amended, or state securities laws and may not be offered or sold in the United States absent registration with the SEC or an applicable
exemption from such registration requirements. We filed registration statements for the 2021, 2020 and 2019 Securities Purchase Agreements with the
SEC, which were declared effective by the SEC in November 2021, August 2020 and April 2019, respectively, which cover the resale of the shares of
common stock issuable in connection with the private placements and upon exercise of the warrants. In May 2021, the registration statement

F-19

 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

for the 2019 Securities Purchase Agreement was deactivated following the expiration of our obligation to maintain its effectiveness under the related
registration rights agreement.

Financing Agreements

In July 2021, we entered into a sales agreement (the “Sales Agreement”) with Cowen and Company, LLC (“Cowen”) pursuant to which we may sell
shares of our common stock from time to time through an “at the market” equity offering for up to $75.0 million in gross cash proceeds. Cowen will act as
the sales agent and will be entitled to compensation for services of up to 3.0% of the gross sales price per share of all shares sold through Cowen under the
Sales Agreement. The shares would be issued pursuant to our effective shelf registration statement on Form S-3 (File No. 333-256107). We filed a
prospectus supplement, dated July 2, 2021, with the SEC in connection with the offer and sale of the shares pursuant to the Sales Agreement. As of
December 31, 2021, no sales have been made under the Sales Agreement.

Common Stock Warrants

We have issued warrants in connection with our securities offerings, SVB loans, and to certain non-employee professional advisers. Excluding the

prefunded warrants we issued in connection with our securities offerings discussed above, the table below summarizes our warrant activity:

Outstanding at December 31, 2020

Exercised
Expired

Outstanding at December 31, 2021

Exercisable at December 31, 2021

Equity Incentive Plans

Warrants

Outstanding

3,673,551 
(2,484)
(4,632)
3,666,435 

3,666,435 

Weighted-

average
Exercise
Price

$

$

$

12.74 
5.02 
97.12 
12.64 

12.64 

Weighted-

average
Remaining
Contract
Term
(in years)

3.12

2.12
2.12

In June 2018 our stockholders approved, the 2018 Equity Incentive Plan (“2018 Plan”). Upon adoption, we ceased granting stock awards under the
Nivalis Therapeutics, Inc. 2015 Equity Incentive Plan (the “2015 EIP”) and the Amended and Restated 2015 Stock Plan (the “2015 Plan”), collectively, the
“Legacy Plans”. All shares of common stock subject to awards under the Legacy Plans that expire or terminate without having been exercised in full, or are
forfeited to or repurchased by the company, will be added to the 2018 Plan, up to a maximum of 1,972,784 shares. In June 2020, in conjunction with our
annual meeting of stockholders, our stockholders approved an additional increase of 743,515 shares authorized under our 2018 Plan.

Under our 2018 Plan we may issue stock options, stock appreciation rights, restricted stock, RSUs or performance shares. As of December 31, 2021

we have only issued stock options and RSUs. Our 2018 Plan provides for an annual increase in the number of shares reserved for insurance equal to the
lesser of (1) 5% of the number of shares of common stock outstanding as of the last day of the preceding calendar year or (2) 1,500,000. However, our
board of directors may act prior to January 1 of a given year to provide that there will be no January 1 increase for such year or that the increase for such
year will be a lesser number of shares. On January 1, 2022, a total of 1,500,000 additional shares were automatically added to the shares authorized under
the 2018 Plan.

In July 2017, in connection with the merger, we assumed Nivalis’ Employee Stock Purchase Plan (the “ESPP”) and the 2015 EIP. Upon assumption

of the ESPP, there were 45,211 shares available for issuance under the ESPP. As of December 31, 2021, we have not activated the ESPP.

Stock options granted under our equity plans generally vest within four years and vested options are exercisable from the grant date until ten years
after the date of grant. Vesting of certain employee options may be accelerated in the event of a change in control of the Company. We grant stock options
to employees with exercise prices equal to the fair value of our common stock on the date of grant. The term of incentive stock options may not exceed ten
years from the date of grant.

F-20

 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

As of December 31, 2021, a total of 6,616,862 shares of common stock were authorized for issuance under our 2018 Plan, 2015 Plan and 2015 EIP.

A summary of stock option activity under our plans is presented below:

Outstanding at December 31, 2020

Granted
Exercised
Forfeited

Outstanding at December 31, 2021

Vested and expected to vest after December 31, 2021

Exercisable at December 31, 2021

Options
Outstanding

Weighted-
average
Exercise
Price

Weighted-
average
Remaining
Contract
Term
(in years)

Aggregate
Intrinsic
Value
(in thousands)

4,175,345  $
1,940,518  $
(91,190) $
(412,930) $
5,611,743  $
5,471,743  $
2,944,273  $

5.30 
12.38 
5.37 
9.88 

7.41 

7.38 

5.25 

7.41 $
7.37 $
6.31 $

36,465 

35,685 

26,053 

The aggregate intrinsic value of stock options exercised during the years ended December 31, 2021, 2020 and 2019 was $546,000, $104,000 and
$155,000, respectively. The fair value of stock options vested during the years ended December 31, 2021, 2020 and 2019 was $3.4 million, $4.2 million
and $3.0 million, respectively.

A summary of our RSU activity under our plans is presented below:

Non-vested at December 31, 2020

Granted

Non-vested at December 31, 2021

Number of

Shares

— 
265,566 
265,566 

Weighted-

average
Remaining
Contract
Life
(in years)

Aggregate

Intrinsic
Value
(in thousands)

Weighted-

Average
Grant Date Fair Value 
(per share)
$
$

— 
12.00 

$

12.00 

1.95

$

491 

The aggregate intrinsic value of RSUs released during the years ended December 31, 2021 and 2020 was $0 and $1.6 million, respectively. The fair
value of RSUs vested during the years ended December 31, 2021 and 2020 was $0 and $461,000, respectively. We had no RSU activity for the year ended
December 31, 2019.

We utilize newly issued shares to satisfy option exercises and RSU releases. As of December 31, 2021, there was $16.4 million of unrecognized

stock-based compensation expense related to approximately 2.9 million nonvested stock options and RSU awards that are expected to be recognized over a
weighted-average period of 2.7 years.

Stock-Based Compensation Expense

The fair value of RSUs is equal to the closing stock price on the date of grant. We use the Black-Scholes option pricing model to estimate the fair

value of stock options at the grant date. The Black-Scholes option pricing model requires us to make certain estimates and assumptions, including
assumptions related to the expected price volatility of our stock, the period during which the options will be outstanding, the rate of return on risk-free
investments, and the expected dividend yield of our stock. The fair values of stock options granted to employees were calculated using the following
assumptions:

Weighted-average estimated fair value at grant
Risk-free interest rate (1)

Expected term of options (in years) (2)
Expected stock price volatility (3)
Expected dividend yield (4)

2021
$8.44
0.25% -

1.3%
3.49 - 6.08
79% - 83%
—%

Years Ended December 31,
2020
$3.03
0.38% -

1.68%

5.27 – 6.90
73% - 82%
—%

2019
$4.14
1.42% -

2.63%

5.27 – 6.08
70% - 77%
—%

(1) The risk-free interest rate assumption was based on zero-coupon U.S. Treasury instruments that had terms consistent with the expected term of our

stock option grants.

(2) We used the “simplified method” for options to determine the expected term of stock options granted, since we do not have sufficient historical

exercise data to provide a reasonable basis upon which to estimate expected term due to the

F-21

 
 
 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

limited time our shares have been publicly traded. Under this approach, the weighted-average expected life is presumed to be the average of the
vesting term and the contractual term of the option.

(3) Volatility is a measure of the amount by which a financial variable, such as share price, has fluctuated or is expected to fluctuate during a period.

We analyzed the stock price volatility of companies at a similar stage of development to estimate expected volatility of our stock price.

(4) We have never declared or paid any cash dividends and do not presently plan to pay cash dividends in the foreseeable future.

Stock-based compensation expense is classified in the Consolidated Statements of Operations and Comprehensive Income (Loss) as follows (in

thousands):

Employee:

Research and development
General and administrative

Non-Employee:

Research and development
General and administrative

Total stock-based compensation expense

13. Income Taxes

2021

Years Ended December 31,
2020

2019

$

$

3,323  $
2,891 

24 
2 
6,240  $

2,145  $
1,955 

34 
6 
4,140  $

1,608 
1,359 

68 
6 
3,041 

Our loss before taxes is derived from domestic (United States) and foreign (Australian) sources as follows (in thousands):
Years Ended December 31,
2020

2021

Domestic
Foreign

Total

$

$

(48,932)
(1,488)
(50,420)

$

$

(28,356)
410 
(27,946)

2019

(38,234)
(3,618)
(41,852)

$

$

The provision for income taxes is composed of the following (in thousands):

Current:

U.S. - Federal
U.S. - State
Foreign
Total current

Deferred:

U.S. - Federal
U.S. - State
Foreign
Total deferred

Total income tax benefit

2021

Years Ended December 31,
2020

2019

$

$

— 
— 
129 
129 

— 
— 
(216)
(216)
(87)

$

$

— 
(6)
— 
(6)

— 
— 
— 
— 
(6)

$

$

— 
— 
— 
— 

— 
— 
— 
— 
— 

F-22

 
 
 
 
 
 
 
 
 
 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

The effective tax rate of the provision for income taxes differs from the federal statutory rate as follows:

U.S. Statutory rate
Effect of:
Permanent differences
Federal research and development credit
Change in valuation allowance
Global intangible low-taxed income recapture
Stock-based compensation
Foreign rate differential
Other
Effective income tax rate

2021

21.0 

(0.4)
4.5 
(21.4)
(1.4)
(1.8)
0.2 
(0.5)
0.2 

%

%
%
%
%
%
%
%
%

Years Ended December 31,
2020

21.0 

0.1 
2.6 
(20.7)
— 
(2.8)
(0.1)
(0.1)
— 

%

%
%
%
%
%
%
%
%

2019

21.0 

(0.1)
1.1 
(19.8)
— 
(0.5)
0.6 
(2.3)
— 

%

%
%
%
%
%
%
%
%

We recorded tax benefits of $87,000, $6,000, and $0, representing effective tax rates of 0.2% for the year ended December 31, 2021, and 0.0%, for
the years ended December 31, 2020 and 2019, respectively. The $87,000 tax benefit for the year ended December 31, 2021 represents deferred tax benefits
from true-ups and the removal of the valuation allowance in place against our foreign deferred tax assets, partially offset by income tax expense for current
year activity.

The difference between the U.S. federal statutory tax rates of 21% and our effective tax rate in all periods is primarily due to changes in our
valuation allowance related to our deferred tax assets and the generation and consumption of federal research and development tax credits. We have elected
to treat taxes due on future U.S. inclusions in taxable income under the global intangible low-taxed income (“GILTI”) provision as a current-period expense
when incurred. As such, expected future GILTI inclusions have not been factored into the measurement of our deferred taxes.

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial
reporting purposes and the amounts used for income tax purposes. The following table represents the significant components of our deferred tax assets and
liabilities for the periods presented (in thousands):

Deferred tax assets:

Net operating loss
Research and development credits
Intangible asset basis
Lease liability
Deferred revenue
Stock based compensation
Other
Gross deferred tax assets
Valuation allowance
Total deferred tax assets, net of valuation allowance

Deferred tax liabilities:
Prepaid expenses
Fixed asset basis
Right-of-use asset basis
Total deferred tax liability

Net deferred tax assets and liabilities

December 31,

2021

2020

$

$

22,054 
6,297 
13 
2,476 
8,333 
1,672 
217 
41,062 
(38,752)
2,310 

(147)
(93)
(1,856)
(2,096)
214 

$

$

21,992 
4,044 
24 
2,619 
— 
1,337 
72 
30,088 
(27,851)
2,237 

(125)
(137)
(1,975)
(2,237)
— 

A valuation allowance is provided for deferred tax assets where the recoverability of the assets is uncertain. The determination to provide a
valuation allowance is dependent upon the assessment of whether it is more likely than not that sufficient taxable income will be generated to utilize the
deferred tax assets. For the year ended December 31, 2021, we determined that based on an evaluation of the four sources of income and all available
evidence, both positive and negative, including our latest forecasts and cumulative losses in recent years, it was more likely than not that none of our
domestic deferred tax assets would be realized and therefore we continued to record a full valuation allowance. For the year ended

F-23

 
 
 
 
 
 
 
 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

December 31, 2021, we determined that it was more likely than not that our foreign deferred tax assets would be realized. As such, we removed the
valuation allowance previously in place against our foreign deferred tax assets as we have generated sufficient foreign taxable income to utilize all
historical operating losses and are expecting future foreign taxable income. The valuation allowance increased by $10.9 million and $5.8 million during the
year ended December 31, 2021 and 2020, respectively.

We have net operating loss (“NOL”) carryforwards as follows (in thousands):

Federal (before January 1, 2018)

Federal (after January 1, 2018)

State

Foreign

2021

11,094 

91,592 

6,433 

— 

$

$

$

$

December 31,
2020

$

$

$

$

11,094 

91,868 

6,433 

— 

2019

11,094 

67,500 

6,433 

787 

$

$

$

$

Federal NOL carryforwards created before January 1, 2018 begin to expire in 2037. Federal NOL carryforwards created after January 1, 2018

carryforward indefinitely. State NOL carryforwards begin to expire in 2038. Foreign NOLs carryforward indefinitely.

We have net research and development tax credit carryforwards as follows (in thousands):

Federal

2021

December 31,
2020

2019

$

7,880 

$

5,063 

$

3,986 

Federal research and development tax credit carryforwards begin to expire in 2035.

Current tax laws impose substantial restrictions on the utilization of research and development credit and NOL carryforwards in the event of an
ownership change, as defined by the Internal Revenue Code Section 382 and 383. Such an event may limit our ability to utilize NOLs and research and
development tax credit carryforwards. Under Internal Revenue Code Section 382 and 383, the 2017 merger with Nivalis is likely considered an ownership
change with respect to the potential limitation of the Nivalis federal tax credits and NOLs. As such, it is likely that any future utilization of Nivalis federal
tax credits and NOLs is substantially limited. Therefore, as of December 31, 2018, all Nivalis tax credit and NOL carryforwards have been reduced to zero.

We account for uncertainty in income taxes in accordance with ASC 740. Tax positions are evaluated in a two-step process, whereby we first
determine whether it is more likely than not that a tax position will be sustained upon examination by the tax authority, including resolutions of any related
appeals or litigation processes, based on technical merit. If a tax position meets the more-likely-than-not recognition threshold it is then measured to
determine the amount of benefit to recognize in the financial statements. The tax position is measured as the largest amount of benefit that is greater than
50% likely of being realized upon ultimate settlement.

The following table summarizes the activity related to unrecognized tax benefits (in thousands):

Unrecognized benefits – beginning of year
Gross increases (decreases) – prior year tax positions
Gross increases – current year tax positions
Unrecognized benefit – end of year

2021

990 
— 
563 
1,553 

$

$

$

$

December 31,
2020

775 
(7)
222 
990 

2019

469 
— 
306 
775 

$

$

All of the unrecognized tax benefits as of December 31, 2021 are accounted for as a reduction in our deferred tax assets. Due to our valuation
allowance, none of the $1.6 million of unrecognized tax benefits would affect our effective tax rate, if recognized. We do not believe it is reasonably
possible that our unrecognized tax benefits will significantly change in the next twelve months.

We recognize interest and penalties related to unrecognized tax benefits as income tax expense. There were no accrued interest or penalties related

to unrecognized tax benefits for 2021, 2020 and 2019.

We do not expect any significant change in our unrecognized tax benefits during the next twelve months.

F-24

 
 
 
 
 
 
ALPINE IMMUNE SCIENCES, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Our material income tax jurisdictions are the United States (federal), California (state), and Australia (foreign). We are subject to audit for tax years

2012 and forward for federal purposes, 2017 and forward for California purposes, and 2019 and forward for foreign purposes.

14. Related Party Transactions

In September 2021, in connection with our 2021 Securities Purchase Agreement we issued 3,723,402 shares of common stock and 2,340,424
prefunded warrants to purchase shares of common stock for gross proceeds of approximately $57.0 million to certain of our stockholders whose beneficial
ownership exceeded 5% prior to the completion of the 2021 Securities Purchases Agreement. Also in September 2021, we exchanged an aggregate of
1,200,000 shares of common stock held Frazier Life Sciences VIII, L.P. for Prefunded Warrants to purchase an aggregate of 1,200,000 shares of common
stock.

None of the purchasers in the July 2020 private placement was a greater than 5% holder of our outstanding capital stock prior to the July 2020

private placement.

In January 2019, in connection with our 2019 Securities Purchase Agreement we sold an aggregate of 935,753 shares of common stock and issued
warrants to purchase an aggregate of 364,943 shares of common stock for gross proceeds of approximately $5.0 million to certain of our 5% stockholders.

15. 401(k) Retirement Plan

We have adopted a 401(k) plan. All employees are eligible to participate, provided they meet the requirements of the plan. Through December 31,
2021, we have not matched employee contributions to the plan. Beginning in 2022, we will match the employees’ 401(k) contributions, at our discretion
and not to exceed a prescribed annual limit.

F-25

Exhibit 10.13

This  Separation  Agreement  and  Release  (“Agreement”)  is  made  by  and  between  Zelanna  Goldberg  (“Employee”)  and  Alpine

Immune Sciences, Inc. (the “Company”) (collectively referred to as the “Parties” or individually referred to as a “Party”).

SEPARATION AGREEMENT AND RELEASE

RECITALS

WHEREAS,  Employee  was  employed  by  the  Company  pursuant  to  that  certain  Executive  Employment  Agreement  between  the

Company and Employee dated June 1, 2021 (the “Employment Agreement”);

WHEREAS, Employee signed an At-Will Employment, Confidential Information, Invention Assignment, and Arbitration Agreement

with the Company on June 1, 2021 (the “Confidentiality Agreement”);

WHEREAS,  the  Parties  entered  into  a  Participation  Agreement  (the  “Participation  Agreement”)  under  the  Company’s  Change  of

Control and Severance Policy (the “Severance Policy”);

WHEREAS, the Parties entered into an Indemnification Agreement dated June 1, 2021 (the “Indemnification Agreement”);

WHEREAS, the Company and Employee have entered into a Stand-Alone Inducement Stock Option Grant, dated June 1, 2021 (the
“Option Agreement”), granting Employee the option to purchase shares of the Company’s common stock subject to the terms and conditions
of the Option Agreement;

WHEREAS, Employee separated from employment with the Company effective October 8, 2021 (the “Separation Date”);

WHEREAS, Employee’s separation from employment with the Company constitutes a “Non-COC Qualified Termination” under the

Severance Policy;

WHEREAS, this Agreement is the “Release” described in the Severance Policy; and

WHEREAS, the Parties wish to resolve any and all disputes, claims, complaints, grievances, charges, actions, petitions, and demands
that the Employee may have against the Company and any of the Releasees as defined below, including, but not limited to, any and all claims
arising out of or in any way related to Employee’s employment with or separation from the Company.

NOW, THEREFORE, in consideration of the mutual promises made herein, the Company and Employee hereby agree as follows:

COVENANTS

1.    Consideration. In consideration of Employee’s execution of this Agreement and Employee’s fulfillment of all of its terms and

conditions, and provided that Employee does not revoke the Agreement under Section 6 below, the Company agrees to the following:

a.    Separation Pay. The  Company  agrees  to  pay  Employee  a  total  of  Three  Hundred  Fifty-Two  Thousand  Five  Hundred
Dollars ($352,500), at the rate of approximately Thirty-Nine Thousand One Hundred Sixty-Six Dollars and Sixty-Seven Cents ($39,166.67)
per month, less applicable withholdings, for nine (9) months following the Separation Date in accordance with the Company’s regular payroll
procedures;  provided,  however,  that  all  payments  shall  be  further  subject  to  the  timing  and  other  provisions  of  the  paragraphs  in  the
Severance Policy bearing the headings “Release,” “Section 409A,” “Reduction of Severance Benefits,” and “Determination of Excise Tax
Liability” (together, the “Severance Policy Surviving Sections”). For the avoidance of doubt, this Agreement is the “Release” referred to in
the Severance Policy.

b.    COBRA. Provided Employee timely elects and pays for continuation coverage pursuant to the Consolidated Omnibus
Budget  Reconciliation  Act  of  1985,  as  amended  (“COBRA”)  within  the  time  period  prescribed  pursuant  to  COBRA,  the  Company  shall
reimburse Employee for the payments Employee makes for COBRA coverage for Employee and Employee’s eligible dependents that were
covered under the Company’s health care plans immediately prior to the Separation Date, for a period of up to the first nine (9) months of
such  coverage,  or,  if  earlier,  until  the  sooner  of  (i)  Employee’s  securing  of  health  insurance  coverage  through  another  employer  or  (ii)
Employee  ceasing  to  be  eligible  for  coverage  under  COBRA.  COBRA  reimbursements  shall  be  made  by  the  Company  to  Employee
consistent  with  the  Company’s  normal  expense  reimbursement  policy,  provided  that  the  Company  receives  documentation  substantiating
Employee’s payments for COBRA coverage. Notwithstanding the preceding, if the Company determines in its sole discretion that it cannot
provide  COBRA  reimbursement  benefits  without  potentially  violating  applicable  law  (including,  without  limitation,  Section  2716  of  the
Public Health Service Act), the Company will instead provide the Employee nine (9) taxable monthly payments each in an amount equal to
the monthly COBRA premium that the Employee would be required to pay to continue the Employee’s group health coverage in effect on the
date  of  termination  of  employment  (which  amount  will  be  based  on  the  premium  for  the  first  month  of  COBRA  coverage),  regardless  of
whether the Employee elects COBRA continuation coverage, beginning on the Company’s first regular payroll date that occurs on or after
the 60  day following the Separation Date and continuing monthly thereafter. Notwithstanding any of the foregoing, all reimbursements or
payments under this paragraph shall be subject to the timing and other provisions of the Severance Policy Surviving Sections.

th

c.    Acknowledgement. Employee acknowledges that (i) without this Agreement, Employee is otherwise not entitled to the
consideration  listed  in  this  Section  1,  (ii)  the  consideration  provided  in  this  Section  1  fully  satisfies  all  of  the  Company’s  obligations  to
Employee under the Participation Agreement and the Severance Policy, (iii) the consideration provided in this Section 1 fully satisfies any
other  obligation  that  the  Company  would  have  had  to  pay  Employee  severance  under  the  Employment  Agreement  or  any  other  plan  or
agreement; and (iv) Employee is entitled to no other severance compensation or severance benefits.

2.    Stock. The Parties agree that for purposes of determining the number of shares of the Company’s common stock that Employee
is entitled to purchase from the Company, pursuant to the exercise of outstanding options, Employee will be considered to have vested only
up to the Separation Date. Employee acknowledges that as of the Separation Date, Employee will have vested in zero (0) options and no
more.

3.    Benefits. Employee’s health insurance benefits shall cease no later than the last day of the month in which the Separation Date
occurs  (or  earlier  as  may  be  required  by  the  applicable  plan  policies,  terms,  and  conditions),  subject  to  Employee’s  right  to  continue
Employee’s health insurance under COBRA. Employee’s participation in all benefits and incidents of employment, including, but not limited
to, vesting in stock options, and the accrual of bonuses, vacation, and paid time off, ceased as of the Separation Date.

4.    Payment of Salary and Receipt of All Benefits. Employee acknowledges and represents that, other than the consideration set
forth  in  this  Agreement,  the  Company  has  paid  or  provided  all  salary,  wages,  bonuses,  accrued  vacation/paid  time  off,  premiums,  leaves,
housing allowances, relocation costs, interest, severance, outplacement costs, fees, reimbursable expenses, commissions, stock, stock options,
vesting, and any and all other benefits and compensation due to Employee.

5.    Release of Claims. Employee agrees that the foregoing consideration represents settlement in full of all outstanding obligations
owed  to  Employee  by  the  Company  and  its  current  and  former  officers,  directors,  employees,  agents,  investors,  attorneys,  shareholders,
administrators, affiliates, benefit plans, plan administrators, professional employer organization or co-employer, insurers, trustees, divisions,
subsidiaries, predecessor and successor corporations, and assigns (collectively, the “Releasees”). Employee, on Employee’s own behalf and
on behalf of Employee’s respective heirs, family members, executors, agents, and assigns, hereby and forever releases the Releasees from,
and agrees not to sue concerning, or in any manner to institute, prosecute, or pursue, any claim, complaint, charge, duty, obligation, demand,
or cause of action relating to any matters of any kind, whether presently known or unknown, suspected or unsuspected, that Employee may
possess against any of the Releasees arising from

any omissions, acts, facts, or damages that have occurred up until and including the date Employee signs this Agreement, including, without
limitation:

termination of that relationship;

a.        any  and  all  claims  relating  to  or  arising  from  Employee’s  employment  relationship  with  the  Company  and  the

b.    any and all claims relating to, or arising from, Employee’s right to purchase, or actual purchase of shares of stock of the
Company, including, without limitation, any claims for fraud, misrepresentation, breach of fiduciary duty, breach of duty under applicable
state corporate law, and securities fraud under any state or federal law;

c.        any  and  all  claims  for  wrongful  discharge  of  employment,  termination  in  violation  of  public  policy,  discrimination,
harassment, retaliation, breach of contract (both express and implied), breach of covenant of good faith and fair dealing (both express and
implied),  promissory  estoppel,  negligent  or  intentional  infliction  of  emotional  distress,  fraud,  negligent  or  intentional  misrepresentation,
negligent or intentional interference with contract or prospective economic advantage, unfair business practices, defamation, libel, slander,
negligence, personal injury, assault, battery, invasion of privacy, false imprisonment, conversion, and disability benefits;

d.    any and all claims for violation of any federal, state, or municipal statute, including, but not limited to, Title VII of the
Civil  Rights  Act  of  1964,  the  Civil  Rights  Act  of  1991,  the  Rehabilitation  Act  of  1973,  the  Americans  with  Disabilities  Act  of  1990,  the
Equal Pay Act, the Fair Labor Standards Act, the Fair Credit Reporting Act, the Age Discrimination in Employment Act of 1967, the Older
Workers Benefit Protection Act, the Employee Retirement Income Security Act of 1974, the Worker Adjustment and Retraining Notification
Act, the Family and Medical Leave Act, the Immigration Reform and Control Act, the National Labor Relations Act, the California Family
Rights Act, the California Labor Code, the California Workers’ Compensation Act, and the California Fair Employment and Housing Act;

e.    any and all claims for violation of the federal or any state constitution;

f.    any and all claims arising out of any other laws and regulations relating to employment or employment discrimination;

treatment of any of the proceeds received by Employee as a result of this Agreement; and

g.        any  claim  for  any  loss,  cost,  damage,  or  expense  arising  out  of  any  dispute  over  the  nonwithholding  or  other  tax

h.    any and all claims for attorneys’ fees and costs.

Employee agrees that the release set forth in this section shall be and remain in effect in all respects as a complete general release as to the
matters released. This release does not extend to any obligations incurred under this Agreement. This release does not release claims that
cannot be released as a matter of law. Any and all disputed wage claims that are released herein shall be subject to binding arbitration in
accordance  with  this  Agreement,  except  as  required  by  applicable  law.  This  release  does  not  extend  to  any  right  Employee  may  have  to
unemployment compensation benefits. In addition, this release does not extend to any rights of indemnification Employee may have under
the  Indemnification  Agreement,  the  Company’s  certificate  of  incorporation  and  bylaws,  or  any  applicable  D&O  insurance  policy  with  the
Company,  subject  to  the  respective  terms,  conditions,  and  limitations  of  such  Indemnification  Agreement,  certificate  of  incorporation  and
bylaws, or D&O insurance policy, in each case, as may be applicable.

6.    Acknowledgment of Waiver of Claims under ADEA. Employee acknowledges that Employee is waiving and releasing any rights
Employee may have under the Age Discrimination in Employment Act of 1967 ("ADEA"), and that this waiver and release is knowing and
voluntary. Employee agrees that this waiver and release does not apply to any rights or claims that may arise under the ADEA after the date
Employee signs this Agreement. Employee acknowledges that the consideration given for this waiver and release is in addition to anything of
value  to  which  Employee  was  already  entitled.  Employee  further  acknowledges  that  Employee  has  been  advised  by  this  writing  that:  (a)
Employee should consult with an attorney prior to executing this Agreement; (b) Employee has twenty-

one (21) days within which to consider this Agreement; (c) Employee has seven (7) days following Employee’s execution of this Agreement
to  revoke  this  Agreement;  (d)  this  Agreement  shall  not  be  effective  until  after  the  revocation  period  has  expired;  and  (e)  nothing  in  this
Agreement prevents or precludes Employee from challenging or seeking a determination in good faith of the validity of this waiver under the
ADEA, nor does it impose any condition precedent, penalties, or costs for doing so, unless specifically authorized by federal law. In the event
Employee  signs  this  Agreement  and  returns  it  to  the  Company  in  less  than  the  21-day  period  identified  above,  Employee  hereby
acknowledges that Employee has freely and voluntarily chosen to waive the time period allotted for considering this Agreement. Employee
acknowledges and understands that revocation must be accomplished by a written notification to the person executing this Agreement on the
Company’s behalf that is received prior to the Effective Date. The Parties agree that changes, whether material or immaterial, do not restart
the running of the 21-day period.

7.    California Civil Code Section 1542. Employee acknowledges that Employee has been advised to consult with legal counsel and
is familiar with the provisions of California Civil Code Section 1542, a statute that otherwise prohibits the release of unknown claims, which
provides as follows:

A  GENERAL  RELEASE  DOES  NOT  EXTEND  TO  CLAIMS  THAT  THE  CREDITOR  OR  RELEASING  PARTY
DOES  NOT  KNOW  OR  SUSPECT  TO  EXIST  IN  HIS  OR  HER  FAVOR  AT  THE  TIME  OF  EXECUTING  THE
RELEASE AND THAT, IF KNOWN BY HIM OR HER, WOULD HAVE MATERIALLY AFFECTED HIS OR HER
SETTLEMENT WITH THE DEBTOR OR RELEASED PARTY.

Employee, being aware of said code section, agrees to expressly waive any rights Employee may have thereunder, as well as under any other
statute or common law principles of similar effect.

8.    No Pending or Future Lawsuits. Employee represents that Employee has no lawsuits, claims, or actions pending in Employee’s
name, or on behalf of any other person or entity, against the Company or any of the other Releasees. Employee also represents that Employee
does not intend to bring any claims on Employee’s own behalf or on behalf of any other person or entity against the Company or any of the
other Releasees.

9.    Confidentiality. Subject to the Protected Activity provision, Employee agrees to maintain in complete confidence the existence
of this Agreement, the contents and terms of this Agreement, and the consideration for this Agreement (hereinafter collectively referred to as
“Separation Information”). Except as required by law, Employee may disclose Separation Information only to Employee’s immediate family
members, the Court in any proceedings to enforce the terms of this Agreement, Employee’s attorney(s), and Employee’s accountant(s) and
any professional tax advisor(s) to the extent that they need to know the Separation Information in order to provide advice on tax treatment or
to prepare tax returns, and must prevent disclosure of any Separation Information to all other third parties. Employee agrees that Employee
will not publicize, directly or indirectly, any Separation Information.

10.    Trade Secrets and Confidential Information/Company Property. Employee acknowledges that, separate from this Agreement,
Employee  remains  under  continuing  obligations  to  the  Company  under  the  Confidentiality  Agreement,  including  the  provisions  therein
regarding nondisclosure of the Company’s trade secrets and confidential and proprietary information. Employee’s signature below constitutes
Employee’s certification under penalty of perjury that Employee has returned all documents and other items provided to Employee by the
Company (with the exception of a copy of the Employee Handbook and personnel documents specifically relating to Employee), developed
or obtained by Employee in connection with Employee’s employment with the Company, or otherwise belonging to the Company.

11.    No Cooperation. Subject to the Protected Activity provision, Employee agrees that Employee will not knowingly encourage,
counsel, or assist any attorneys or their clients in the presentation or prosecution of any disputes, differences, grievances, claims, charges, or
complaints by any third party against any of the Releasees, unless under a subpoena or other court order to do so or upon written request from
an  administrative  agency  or  the  legislature  or  as  related  directly  to  the  ADEA  waiver  in  this  Agreement.  Employee  agrees  both  to
immediately notify the Company upon receipt of any such

subpoena or court order or written request from an administrative agency or the legislature, and to furnish, within three (3) business days of
its receipt, a copy of such subpoena or other court order or written request from an administrative agency or the legislature. If approached by
anyone for counsel or assistance in the presentation or prosecution of any disputes, differences, grievances, claims, charges, or complaints
against any of the Releasees, Employee shall state no more than that Employee cannot provide counsel or assistance.

12.        Protected Activity Not Prohibited. Employee  understands  that  nothing  in  this  Agreement  shall  in  any  way  limit  or  prohibit
Employee from engaging in any Protected Activity. Protected Activity includes filing and/or pursuing a charge, complaint, or report with, or
otherwise  communicating,  cooperating,  or  participating  in  any  investigation  or  proceeding  that  may  be  conducted  by  any  federal,  state  or
local  government  agency  or  commission,  including  the  Securities  and  Exchange  Commission,  the  Equal  Employment  Opportunity
Commission,  the  Occupational  Safety  and  Health  Administration,  and  the  National  Labor  Relations  Board  (“Government  Agencies”).
Employee understands that in connection with such Protected Activity under this section, Employee is permitted to disclose documents or
other  information  as  permitted  by  law,  without  giving  notice  to,  or  receiving  authorization  from,  the  Company.  Notwithstanding  the
foregoing,  Employee  agrees  to  take  all  reasonable  precautions  to  prevent  any  unauthorized  use  or  disclosure  of  any  information  that  may
constitute  Company  confidential  information  under  the  Confidentiality  Agreement  to  any  parties  other  than  the  Government  Agencies.
Employee  further  understands  that  “Protected  Activity”  does  not  include  the  disclosure  of  any  Company  attorney-client  privileged
communications or attorney work product. Any language in the Confidentiality Agreement regarding Employee’s right to engage in Protected
Activity that conflicts with, or is contrary to, this section is superseded by this Agreement. In addition, pursuant to the Defend Trade Secrets
Act of 2016, Employee is notified that an individual will not be held criminally or civilly liable under any federal or state trade secret law for
the disclosure of a trade secret that (i) is made in confidence to a federal, state, or local government official (directly or indirectly) or to an
attorney solely for the purpose of reporting or investigating a suspected violation of law, or (ii) is made in a complaint or other document
filed  in  a  lawsuit  or  other  proceeding,  if  (and  only  if)  such  filing  is  made  under  seal.  In  addition,  an  individual  who  files  a  lawsuit  for
retaliation by an employer for reporting a suspected violation of law may disclose the trade secret to the individual’s attorney and use the
trade  secret  information  in  the  court  proceeding,  if  the  individual  files  any  document  containing  the  trade  secret  under  seal  and  does  not
disclose the trade secret, except pursuant to court order.

13.    Nondisparagement. Employee agrees to refrain from any disparagement, defamation, libel, or slander of any of the Releasees,
and agrees to refrain from any tortious interference with the contracts and relationships of any of the Releasees. Employee shall direct any
inquiries by potential future employers to the Company’s human resources department, which shall use its best efforts to provide only the
Employee’s last position and dates of employment.

14.    Cooperation with the Company. Employee  agrees  that  Employee  shall  provide  reasonable  cooperation  and  assistance  to  the
Company in the resolution of any matters in which Employee was involved during the course of Employee’s employment, or about which
Employee has knowledge, and in the defense or prosecution of any investigations, audits, claims or actions now in existence or which may be
brought or threatened in the future against or on behalf of the Company, including any investigations, audits, claims or actions involving or
against its officers, directors and employees.  Employee’s cooperation with such matters shall include, without limitation, being available to
consult with the Company regarding matters in which Employee has been involved or has knowledge; to reasonably assist the Company in
preparing  for  any  proceeding  (including,  without  limitation,  depositions,  mediations,  hearings,  settlement  negotiations,  discovery
conferences, arbitration, or trial); to provide affidavits reflecting truthful written testimony; to assist with any audit, inspection, proceeding or
other inquiry; and to act as a witness to provide truthful testimony in connection with any investigation, audit, mediation, litigation or other
legal  proceeding  affecting  the  Company.    Employee  agrees  to  keep  the  Company’s  Human  Resource  department  apprised  of  Employee’s
current contact information, including telephone numbers, work address, home address, and email address(es), and to promptly respond to
communications  from  the  Company  in  connection  with  this  Section  14.    Employee  understands  and  agrees  that  this  provision  requires
Employee’s cooperation with the Company, but is not intended to have any influence whatsoever on any specific outcome in any matter and
Employee is expected at all times to provide truthful testimony and responses in connection with any matter.  Employee understands and

agrees that Employee is not otherwise entitled to any additional compensation for such cooperation, beyond the payments and consideration
provided under this Agreement.

15.    Breach. In addition to the rights provided in the “Attorneys’ Fees” section below, Employee acknowledges and agrees that any
material breach of this Agreement, unless such breach constitutes a legal action by Employee challenging or seeking a determination in good
faith of the validity of the waiver herein under the ADEA, or of any provision of the Confidentiality Agreement (except as amended herein)
shall entitle the Company immediately to recover and/or cease providing the consideration provided to Employee under this Agreement and
to obtain damages, except as provided by law.

16.        No  Admission  of  Liability.  Employee  understands  and  acknowledges  that  with  respect  to  all  claims  released  herein,  this
Agreement constitutes a compromise and settlement of any and all actual or potential disputed claims by Employee unless such claims were
explicitly not released by the release in this Agreement. No action taken by the Company hereto, either previously or in connection with this
Agreement,  shall  be  deemed  or  construed  to  be  (a)  an  admission  of  the  truth  or  falsity  of  any  actual  or  potential  claims  or  (b)  an
acknowledgment or admission by the Company of any fault or liability whatsoever to Employee or to any third party.

17.    Costs. The Parties shall each bear their own costs, attorneys’ fees, and other fees incurred in connection with the preparation of

this Agreement.

18.        ARBITRATION.  EXCEPT  AS  PROHIBITED  BY  LAW,  THE  PARTIES  AGREE  THAT  ANY  AND  ALL  DISPUTES
ARISING  OUT  OF  THE  TERMS  OF  THIS  AGREEMENT,  THEIR  INTERPRETATION,  EMPLOYEE’S  EMPLOYMENT  WITH  THE
COMPANY  OR  THE  TERMS  THEREOF,  OR  ANY  OF  THE  MATTERS  HEREIN  RELEASED,  SHALL  BE  SUBJECT  TO
ARBITRATION UNDER THE FEDERAL ARBITRATION ACT (THE “FAA”) AND THAT THE FAA SHALL GOVERN AND APPLY
TO THIS ARBITRATION AGREEMENT WITH FULL FORCE AND EFFECT; HOWEVER, WITHOUT LIMITING ANY PROVISIONS
OF THE FAA, A MOTION OR PETITION OR ACTION TO COMPEL ARBITRATION MAY ALSO BE BROUGHT IN STATE COURT
UNDER THE PROCEDURAL PROVISIONS OF SUCH STATE’S LAWS RELATING TO MOTIONS OR PETITIONS OR ACTIONS TO
COMPEL  ARBITRATION.  EMPLOYEE  AGREES  THAT,  TO  THE  FULLEST  EXTENT  PERMITTED  BY  LAW,  EMPLOYEE  MAY
BRING ANY SUCH ARBITRATION PROCEEDING ONLY IN EMPLOYEE’S INDIVIDUAL CAPACITY. ANY ARBITRATION WILL
OCCUR IN SAN MATEO COUNTY, CALIFORNIA, BEFORE JAMS, PURSUANT TO ITS EMPLOYMENT ARBITRATION RULES &
PROCEDURES  (“JAMS  RULES”),  EXCEPT  AS  EXPRESSLY  PROVIDED  IN  THIS  SECTION.  THE  PARTIES  AGREE  THAT  THE
ARBITRATOR  SHALL  HAVE  THE  POWER  TO  DECIDE  ANY  MOTIONS  BROUGHT  BY  ANY  PARTY  TO  THE  ARBITRATION,
INCLUDING  MOTIONS  FOR  SUMMARY  JUDGMENT  AND/OR  ADJUDICATION,  AND  MOTIONS  TO  DISMISS  AND
DEMURRERS,  APPLYING  THE  STANDARDS  SET  FORTH  UNDER  THE  CALIFORNIA  CODE  OF  CIVIL  PROCEDURE.  THE
PARTIES  AGREE  THAT  THE  ARBITRATOR  SHALL  ISSUE  A  WRITTEN  DECISION  ON  THE  MERITS.  THE  PARTIES  ALSO
AGREE THAT THE ARBITRATOR SHALL HAVE THE POWER TO AWARD ANY REMEDIES AVAILABLE UNDER APPLICABLE
LAW,  AND  THAT  THE  ARBITRATOR  MAY  AWARD  ATTORNEYS’  FEES  AND  COSTS  TO  THE  PREVAILING  PARTY,  WHERE
PERMITTED  BY  APPLICABLE  LAW.  THE  ARBITRATOR  MAY  GRANT  INJUNCTIONS  AND  OTHER  RELIEF  IN  SUCH
DISPUTES. THE DECISION OF THE ARBITRATOR SHALL BE FINAL, CONCLUSIVE, AND BINDING ON THE PARTIES TO THE
ARBITRATION.  THE  PARTIES  AGREE  THAT  THE  PREVAILING  PARTY  IN  ANY  ARBITRATION  SHALL  BE  ENTITLED  TO
INJUNCTIVE  RELIEF  IN  ANY  COURT  OF  COMPETENT  JURISDICTION  TO  ENFORCE  THE  ARBITRATION  AWARD.  THE
PARTIES  TO  THE  ARBITRATION  SHALL  EACH  PAY  AN  EQUAL  SHARE  OF  THE  COSTS  AND  EXPENSES  OF  SUCH
ARBITRATION,  AND  EACH  PARTY  SHALL  SEPARATELY  PAY  FOR  ITS  RESPECTIVE  COUNSEL  FEES  AND  EXPENSES;
PROVIDED,  HOWEVER,  THAT  THE  ARBITRATOR  MAY  AWARD  ATTORNEYS’  FEES  AND  COSTS  TO  THE  PREVAILING
PARTY, EXCEPT AS PROHIBITED BY LAW. THE PARTIES HEREBY AGREE TO WAIVE THEIR RIGHT TO HAVE ANY DISPUTE
BETWEEN  THEM  RESOLVED  IN  A  COURT  OF  LAW  BY  A  JUDGE  OR  JURY.  NOTWITHSTANDING  THE  FOREGOING,  THIS
SECTION WILL NOT PREVENT EITHER PARTY FROM SEEKING

INJUNCTIVE  RELIEF  (OR  ANY  OTHER  PROVISIONAL  REMEDY)  FROM  ANY  COURT  HAVING  JURISDICTION  OVER  THE
PARTIES  AND  THE  SUBJECT  MATTER  OF  THEIR  DISPUTE  RELATING  TO  THIS  AGREEMENT  AND  THE  AGREEMENTS
INCORPORATED HEREIN BY REFERENCE. SHOULD ANY PART OF THE ARBITRATION AGREEMENT CONTAINED IN THIS
SECTION  CONFLICT  WITH  ANY  OTHER  ARBITRATION  AGREEMENT  BETWEEN  THE  PARTIES,  INCLUDING,  BUT  NOT
LIMITED  TO  THE  ARBITRATION  SECTION  OF  THE  CONFIDENTIALITY  AGREEMENT,  THE  PARTIES  AGREE  THAT  THIS
ARBITRATION AGREEMENT IN THIS SECTION SHALL GOVERN.

19.    Tax Consequences. The Company makes no representations or warranties with respect to the tax consequences of the payments
and any other consideration provided to Employee or made on Employee’s behalf under the terms of this Agreement. Employee agrees and
understands  that  Employee  is  responsible  for  payment,  if  any,  of  local,  state,  and/or  federal  taxes  on  the  payments  and  any  other
consideration provided hereunder by the Company and any penalties or assessments thereon. Employee further agrees to indemnify and hold
the Releasees harmless from any claims, demands, deficiencies, penalties, interest, assessments, executions, judgments, or recoveries by any
government agency against the Company for any amounts claimed due on account of (a) Employee’s failure to pay or delayed payment of
federal or state taxes, or (b) damages sustained by the Company by reason of any such claims, including attorneys’ fees and costs. The Parties
agree and acknowledge that the payments made pursuant to Section 1 of this Agreement are not related to sexual harassment or sexual abuse
and not intended to fall within the scope of 26 U.S.C. Section 162(q).

20.    Section 409A. It is intended that this Agreement comply with, or be exempt from, Code Section 409A and the final regulations
and  official  guidance  thereunder  (“Section  409A”)  and  any  ambiguities  herein  will  be  interpreted  to  so  comply  and/or  be  exempt  from
Section 409A. Each payment and benefit to be paid or provided under this Agreement is intended to constitute a series of separate payments
for  purposes  of  Section  1.409A-2(b)(2)  of  the  Treasury  Regulations.  The  Company  and  Employee  will  work  together  in  good  faith  to
consider either (i) amendments to this Agreement; or (ii) revisions to this Agreement with respect to the payment of any awards, which are
necessary  or  appropriate  to  avoid  imposition  of  any  additional  tax  or  income  recognition  prior  to  the  actual  payment  to  Employee  under
Section 409A. In no event will the Releasees reimburse Employee for any taxes that may be imposed on Employee as a result of Section
409A.

21.    Authority. The Company represents and warrants that the undersigned has the authority to act on behalf of the Company and to
bind the Company and all who may claim through it to the terms and conditions of this Agreement. Employee represents and warrants that
Employee has the capacity to act on Employee’s own behalf and on behalf of all who might claim through Employee to bind them to the
terms and conditions of this Agreement. Each Party warrants and represents that there are no liens or claims of lien or assignments in law or
equity or otherwise of or against any of the claims or causes of action released herein.

22.    Severability. In the event that any provision or any portion of any provision hereof or any surviving agreement made a part
hereof becomes or is declared by a court of competent jurisdiction or arbitrator to be illegal, unenforceable, or void, this Agreement shall
continue in full force and effect without said provision or portion of provision.

23.    Attorneys’ Fees. Except with regard to a legal action challenging or seeking a determination in good faith of the validity of the
waiver  herein  under  the  ADEA,  in  the  event  that  either  Party  brings  an  action  to  enforce  or  effect  its  rights  under  this  Agreement,  the
prevailing Party shall be entitled to recover its costs and expenses, including the costs of mediation, arbitration, litigation, court fees, and
reasonable attorneys’ fees incurred in connection with such an action.

24.    Entire Agreement. This Agreement represents the entire agreement and understanding between the Company and Employee
concerning the subject matter of this Agreement and Employee’s employment with and separation from the Company and the events leading
thereto and associated therewith, and supersedes and replaces any and all prior agreements and understandings concerning the subject matter
of  this  Agreement  and  Employee’s  relationship  with  the  Company,  including,  for  example,  the  Employment  Agreement,  the  Participation
Agreement, and the Severance Policy. Notwithstanding the foregoing, the respective rights and obligations of each of the Parties prescribed
in the following

agreements  shall  remain  in  full  force  and  effect  and  survive  Employee’s  separation  from  employment  with  the  Company:  (a)  the
Confidentiality Agreement, (b) the Option Agreement, (c) the Indemnification Agreement, (d) Sections 7-23 of the Employment Agreement,
and (e) the Severance Policy Surviving Sections (as defined above).

25.        No  Oral  Modification. This  Agreement  may  only  be  amended  in  a  writing  signed  by  Employee  and  the  Company’s  Chief

Executive Officer.

26.    Governing Law. This Agreement shall be governed by the laws of the State of California, without regard for choice-of-law
provisions, except that any dispute regarding the enforceability of the arbitration section of this Agreement shall be governed by the FAA.
Employee consents to personal and exclusive jurisdiction and venue in the State of California.

27.    Effective Date. Employee understands that this Agreement shall be null and void if not executed by Employee within twenty-
one (21) days. Each Party has seven (7) days after that Party signs this Agreement to revoke it. This Agreement will become effective on the
eighth (8th) day after Employee signed this Agreement, so long as it has been signed by the Parties and has not been revoked by either Party
before that date (the “Effective Date”).

28.    Counterparts. This Agreement may be executed in counterparts and each counterpart shall be deemed an original and all of
which counterparts taken together shall have the same force and effect as an original and shall constitute an effective, binding agreement on
the part of each of the undersigned.  The counterparts of this Agreement may be executed and delivered by facsimile, photo, email PDF, or
other electronic transmission or signature.

[THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS]

29.    Voluntary Execution of Agreement. Employee understands and agrees that Employee executed this Agreement voluntarily and
without  any  duress  or  undue  influence  on  the  part  or  behalf  of  the  Company  or  any  third  party,  with  the  full  intent  of  releasing  all  of
Employee’s claims against the Company and any of the other Releasees. Employee acknowledges that:

(a)    Employee has read this Agreement;

(b)    Employee has been represented in the preparation, negotiation, and execution of this Agreement by legal counsel of

Employee’s own choice or has elected not to retain legal counsel;

(c)    Employee understands the terms and consequences of this Agreement and of the releases it contains;

(d)    Employee is fully aware of the legal and binding effect of this Agreement; and

(e)    Employee has not relied upon any representations or statements made by the Company that are not specifically set forth

in this Agreement.

IN WITNESS WHEREOF, the Parties have executed this Agreement on the respective dates set forth below.

        ZELANNA GOLDBERG, an individual

Dated: 10/7/2021        /s/ Zelanna Goldberg            
        Zelanna Goldberg

        ALPINE IMMUNE SCIENCES, INC.

Dated: 10/7/2021        By /s/ Paul Rickey            
            Paul Rickey
            Chief Financial Officer

Exhibit 10.30

Execution Version

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND
WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. OMISSIONS ARE
DESIGNATED AS [***].

LICENSE AND COLLABORATION AGREEMENT

This LICENSE AND COLLABORATION AGREEMENT (the “Agreement”) is entered into as of December 15, 2021
(the  “Effective  Date”)  by  and  between  Horizon  Therapeutics  Ireland  DAC,  a  company  formed  under  the  laws  of  Ireland
(“Horizon”),  and  Alpine  Immune  Sciences,  Inc.,  a  Delaware  corporation  (“Alpine”).  Alpine  and  Horizon  are  sometimes
referred to herein individually as a “Party” and collectively as the “Parties”.

RECITALS

Whereas, Alpine has (a) a preclinical biologic therapeutic program comprising a proprietary lead [***] compound and
other  [***]  compounds  that  include  [***]  and  (b)  proprietary  scientific  technology  and  expertise  to  generate  libraries  of
compounds  and  variants  and  fusion  proteins,  including  [***]  compounds,  designed  to  have  specified  characteristics  and
biological functions;

Whereas,  Horizon  possesses  resources  and  expertise  in  the  development  and  commercialization  of  pharmaceutical
products and is interested in further advancing the [***] biologic therapeutic program and engaging Alpine to conduct a research
collaboration for discovery of compounds and variants directed to biologic targets selected by Horizon; and

Whereas, Alpine and Horizon wish to engage in a multi-program research collaboration, and Alpine wishes to grant, and
Horizon  wishes  to  obtain  an  exclusive  license  under  certain  intellectual  property  rights  of  Alpine  to  research,  develop,
manufacture, commercialize and otherwise exploit Licensed Compounds and Licensed Products in the Field (as such terms are
defined herein) in accordance with and on the terms and conditions set forth below.

Now, Therefore, in consideration of the foregoing premises and the mutual covenants and conditions contained in this

Agreement, the Parties agree as follows:

ARTICLE 1
DEFINITIONS

1.1    “AAA Rules” has the meaning set forth in Section 12.1(d).

1.2    “Acquiror” has the meaning set forth in Section 12.6.

1.3    “Affiliate” means, with respect to a particular Person, any other Person that controls, is controlled by or is under
common  control  with  such  Person,  for  as  long  as  such  control  exists.  For  the  purposes  of  this  definition,  the  word  “control”
(including, with correlative meaning, the terms “controlled by” or “under common control with”) shall mean the actual power,
either directly or indirectly through one or more intermediaries, to direct or cause the direction of the management and policies of
such  entity,  whether  by  the  ownership  of  fifty  percent  (50%)  or  more  of  the  voting  stock  of  such  entity,  or  by  contract  or
otherwise.

1.4    “Alpine Controlled Patents” has the meaning set forth in Section 7.2(a)(iv).

1.5    “Alpine Indemnitees” has the meaning set forth in Section 9.2.

1.6    “Alpine Libraries” means Alpine’s libraries of proteins and molecules that: (a) [***] and (b) [***], but in any event

excluding all Alpine Reserved Sequences.

1.7    “Alpine Reserved Sequence” means those proteins and molecules identified in Exhibit A, as may be updated by

Alpine during the Query Period in accordance with Section 2.3(a).

1.8    “Alpine Third Party Agreement” has the meaning set forth in Section 2.7(b).

1.9    “Back-Up Compounds” means the [***] identified as back-ups to the Lead Compound on Exhibit B, as may be

modified pursuant to Section 2.3.

1.10    “Bankruptcy Code” means Title 11, U.S. Code Sections 101 et. Seq.

1.11    “Binding” means as to a Binding Partner, [***]; and “Bind” has its cognate meaning.

1.12    “Binding Partner” means any physiological molecular binding partner of a Target [***].

1.13    “Biosimilar” means, as determined on a country-by-country basis, any product with respect to a Licensed Product
(a) which (i) has been licensed as a biosimilar or interchangeable product by FDA pursuant to Article 351(k) of the Public Health
Service Act (42 U.S.C. 262(k)), as may be amended, or any subsequent or superseding law, statute or regulation, (ii) has been
licensed  as  a  similar  biological  medicinal  product  by  EMA  pursuant  to  Directive  2001/83/EC,  as  may  be  amended,  or  any
subsequent or superseding law, statute or regulation, or (iii) has otherwise achieved Regulatory Approval from another applicable
Regulatory  Authority  on  a  basis  analogous  to  clause  (a)(i)  or  (ii),  in  each  case  (clause  (i)  and  (ii));  or  (b)  obtained  marketing
approval in such country in the Territory by means of an abbreviated procedure that relies (i) in whole or in part on the safety and
efficacy data contained in the Regulatory Approval Application for such Licensed Product submitted by Horizon or its Affiliate
or Sublicensee and approved in such country, or (ii) on establishing biosimilarity to such Licensed Product in such country, and in
each case (clause (a) and (b)) which product is marketed for sale by a Third Party (not licensed, supplied or otherwise authorized
by Horizon or its Affiliates or Sublicensees) in a country in the Territory.

1.14    “Business Day” means any weekday that is not a legal holiday in New York, New York, U.S. or Dublin, Ireland,

and is not a day on which banking institutions are required by Law to be closed.

1.15    “Calendar Quarter” means the respective periods of three (3) consecutive calendar months ending on March 31,
June  30,  September  30  and  December  31;  provided,  however,  that  (a)  the  first  Calendar  Quarter  of  any  particular  period  shall
extend  from  the  commencement  of  such  period  to  the  end  of  the  first  complete  Calendar  Quarter  thereafter;  and  (b)  the  last
Calendar Quarter shall end upon the expiration or termination of this Agreement.

1.16    “Calendar Year” means (a) for the first Calendar Year of the Term, the period beginning on the Effective Date and
ending on December 31, 2021, (b) for each Calendar Year of the Term thereafter, each successive period beginning on January 1
and ending twelve (12) consecutive calendar months later on December 31, and (c) for the last Calendar Year of the

2

Term, the period beginning on January 1 of the Calendar Year in which the Agreement expires or terminates and ending on the
effective date of expiration or termination of this Agreement.

1.17    [***].

1.18    [***].

1.19    “Change of Control” means the occurrence of any of the following: (a) a Party enters into a merger, consolidation,
business  combination,  recapitalization,  share  exchange,  stock  sale  or  sale  or  transfer  of  all  or  substantially  all  of  its  assets  to
which this Agreement relates, or other similar transaction or series of transactions with a Third Party; or (b) any transaction or
series of related transactions in which any Third Party or group of Third Parties acquires beneficial ownership of securities of a
Party representing more than fifty percent (50%) of the combined voting power of the then outstanding securities of such Party.
Notwithstanding  the  foregoing  clauses  (a)  or  (b),  a  stock  sale  to  underwriters  of  a  public  offering  of  a  Party’s  capital  stock  or
other Third Parties for the purpose of financing or a transaction solely to change the domicile of a Party shall not constitute a
Change of Control.

1.20    “Claims” has the meaning set forth in Section 9.1.

1.21    “Clinical Trial” means any human clinical trial of a product as defined in 21 C.F.R. § 312.21, or an equivalent

human clinical trial prescribed by the Regulatory Authorities in a foreign country.

1.22    “Code” means the Internal Revenue Code of 1986, as amended.

1.23    “Combination Product” means a Licensed Product that contains a Licensed Compound as an active ingredient
and includes at least one (1) active pharmaceutical ingredient other than a Licensed Compound (whether co-formulated or co-
packaged) and is sold either as a fixed dose or as separate doses in a single package.

1.24        “Commercialization”  means  all  activities  undertaken  before  and  after  obtaining  Regulatory  Approval  relating
specifically to the pre-launch, launch, promotion, detailing, medical education and medical liaison activities, marketing, pricing,
reimbursement,  sale,  import,  export  and  distribution  of  Licensed  Products  in  the  Field  in  the  Territory,  including  strategic
marketing,  sales  force  detailing,  advertising,  all  customer  support,  Licensed  Product  distribution  and  invoicing  and  sales
activities,  including  any  clinical  study  conducted  after  Regulatory  Approval  of  a  Licensed  Product.  “Commercialize”  has  a
correlative meaning.

1.25    “Commercially Reasonable Efforts” means efforts [***]. Commercially Reasonable Efforts shall be determined

[***].

1.26    “Confidential Information” of a Party means any and all Information that is disclosed by or on behalf a Party to
the other Party or its Affiliates pursuant to this Agreement, whether in oral, written, graphic, or electronic form. All Information
disclosed by or on behalf of a Party or its Affiliate pursuant to the Confidentiality Agreement shall be deemed to be such Party’s
Confidential Information, with the mutual understanding and agreement that any use or disclosure thereof that is authorized under
Article  10  shall  not  be  restricted  by  or  be  deemed  a  violation  of  the  Confidentiality  Agreement.  Notwithstanding  anything
contained herein to the contrary, (a) all Horizon Sole Program IP and Research Program IP shall be deemed to be the Confidential
Information of Horizon, where Horizon shall be deemed to be the disclosing Party and Alpine shall be deemed to be the receiving
Party with respect thereto; (b) all Alpine Sole

3

Program  IP  shall  be  deemed  to  be  the  Confidential  Information  of  Alpine,  where  Alpine  shall  be  deemed  to  be  the  disclosing
Party and Horizon shall be deemed to be the receiving Party with respect thereto; and (c) all Joint Program IP, and the terms of
this Agreement, shall be deemed to be the Confidential Information of both Parties, and both Parties shall be deemed to be the
receiving Party with respect thereto.

1.27    “Confidentiality Agreement” means the Mutual Confidentiality Agreement between Alpine and Viela Bio, Inc.

(now an Affiliate of Horizon), dated as of November 14, 2019, as amended.

1.28    “Conflict”  means,  with  respect  to  any  Target  identified  as  a  Proposed  Target,  that  as  of  the  date  such  Target  is

proposed by Horizon, such Target is the subject of: [***].

1.29    “Control” means with respect to any Information or intellectual property right, that an entity (a) owns or (b) has
the right to grant access, a license, or a sublicense (as applicable, other than by virtue of the rights granted in this Agreement) to
such Information or intellectual property right on the terms and conditions set forth in this Agreement without violating the terms
of any then-existing agreement with any Third Party. “Controlled” has a correlative meaning. Notwithstanding the foregoing, the
following shall not be deemed to be Controlled by Alpine or its Affiliates: (i) any Information or intellectual property owned or
controlled  by  any  Acquiror  immediately  prior  to  the  effective  date  of  the  Change  of  Control,  and  (ii)  any  Information  or
intellectual property developed or acquired by or on behalf of any Acquiror after a Change of Control, without access to or use of
the  Alpine  Libraries,  Licensed  Technology  or  Confidential  Information  of  Horizon  or  use  of  any  employees  or  subcontractors
who have or have had access to any of the foregoing; however, for clarity, any Information or Patents used or generated by the
Acquiror or its Affiliates in performing any activity pursuant to this Agreement shall be considered to be Controlled by Alpine or
its Affiliates and included in the Licensed Technology subject to the license granted to Horizon under this Agreement.

1.30    “COVID Event” has the meaning set forth in Section 12.3.

1.31    [***].

1.32    [***].

1.33    “Cure Period” has the meaning set forth in Section 11.3.

1.34    “Deliverables” means the types and quantities of molecules, controls, plasmids, and proteins to be provided for the
Existing Program described in Exhibit C, as may be amended by written agreement of the Parties, or otherwise agreed in any
other work plan for the Existing Program agreed in writing by the Parties pursuant to this Agreement.

1.35        “Deliverables  Budget”  means  the  budget  setting  forth  the  total  costs  and  expenses  for  Alpine  to  perform  the
activities  contemplated  by  the  applicable  Deliverables  Plan  and  generate  and  deliver  the  Deliverables.  The  initial  Deliverables
Budget is attached hereto as Exhibit D, as may be amended by written agreement of the Parties.

1.36    “Deliverables Plan” means each work plan for the Existing Program agreed to by the Parties in writing setting
forth certain activities to be conducted by Alpine, Queries, and Deliverables. The initial Deliverables Plan is attached hereto as
Exhibit C, as may be amended by written agreement of the Parties.

4

1.37    “Designated European Country” means [***].

1.38    “Development” means all activities that relate to obtaining, maintaining or expanding Regulatory Approval for a
Licensed  Compound  or  Licensed  Product,  including  research,  preclinical  testing,  toxicology,  formulation,  Clinical  Trials,
preparation,  submission,  review,  and  development  of  data  or  information  for  the  purpose  of  submission  to  a  Governmental
Authority  to  obtain,  maintain  or  expand  Regulatory  Approval  for  a  Licensed  Compound  or  Licensed  Product,  and  any  post-
marketing surveillance study of a Licensed Compound or Licensed Product, whether or not required as a condition to, or for the
maintenance  of  any  Regulatory  Approval  for  a  Licensed  Compound  or  Licensed  Product.  “Develop”  and  “Developing”  have
correlative meanings.

1.39    “Dollar” means a U.S. dollar, and “$” shall be interpreted accordingly.

1.40    [***].

1.41    “EMA” means the European Medicines Agency or any successor entity.

1.42    “Excluded Target” means, individually and collectively, any Target for which there is a Conflict.

1.43    “Excluded Target List” means the list provided from time to time by Alpine to the Gatekeeper listing Targets for

which there is a Conflict.

1.44    “Existing Program”  means Alpine’s preclinical  biological  therapeutic  program  comprising  [***], including the

Lead Compound and any Back-Up Compound, and the Alpine Libraries.

1.45    “Existing Program IP” has the meaning set forth in Section 7.1(b)(i).

1.46        “FD&C  Act”  means  the  U.S.  Federal  Food,  Drug  and  Cosmetic  Act,  as  amended,  and  applicable  regulations

promulgated thereunder by the FDA.

1.47    “FDA” means the U.S. Food and Drug Administration or any successor entity.

1.48    “Field” means any and all uses.

1.49    “First Commercial Sale” means, with respect to a Licensed Product in a country, the first sale to a Third Party
following the receipt of Regulatory Approval (including pricing and reimbursement approval if necessary to initiate marketing
and sale of such Licensed Product in such country) in such country; provided that “First Commercial Sale” shall not include sale,
disposal or use of a Licensed Product for marketing, regulatory, development or charitable purposes, such as clinical trials, pre-
clinical trials, compassionate use, named patient use, or indigent patient programs, in each case, without consideration.

1.50    “Force Majeure” has the meaning set forth in Section 12.3.

1.51    “FTE” means the equivalent of the work of one qualified employee or agent for the applicable activities, full time,

for one year.

5

1.52        “FTE  Rate”  means  [***]  per  one  full  FTE  per  [***],  which  rate  includes  all  direct  and  indirect  costs  of  the

performing Party’s FTE, including personnel and travel expenses. Such rate, [***].

1.53    “GAAP” means the then current generally accepted accounting principles in the U.S., as applied on a consistent

basis.

1.54    “Gatekeeper” means a Third Party selected by the Parties to oversee the management of the Excluded Target List

and the Reserved Target List.

1.55    “GCP” or “Good Clinical Practices” means the then-current standards, practices and procedures promulgated or
endorsed  by  the  FDA  as  set  forth  in  the  guidelines  entitled  “Guidance  for  Industry  E6  Good  Clinical  Practice:  Consolidated
Guidance,” including related regulatory requirements imposed by the FDA and comparable regulatory standards, practices and
procedures promulgated by the EMA or other Regulatory Authority applicable to the Territory, as they may be updated from time
to time, including applicable quality guidelines promulgated under the ICH.

1.56    “GLP” or “Good Laboratory Practices” means the then-current good laboratory practice standards promulgated
or endorsed by the FDA as defined in 21 C.F.R. Part 58, and comparable regulatory standards promulgated by the EMA or other
Regulatory  Authority  applicable  to  the  Territory,  as  they  may  be  updated  from  time  to  time,  including  applicable  quality
guidelines promulgated under the ICH.

1.57        “Governmental  Authority”  means  any  multinational,  federal,  state,  local,  municipal,  provincial  or  other
governmental authority of any nature (including any governmental division, prefecture, subdivision, department, agency, bureau,
branch, office, commission, council, court or other tribunal).

1.58    “Horizon Controlled Patents” has the meaning set forth in Section 7.2(a)(i).

1.59    “Horizon Indemnitees” has the meaning set forth in Section 9.1.

1.60    “Horizon Reserved Sequence” has the meaning set forth in Section 2.3(b).

1.61        “In  Vivo  Pharmacology  Study”  means  any  study  which  includes  an  efficacy  or  pharmacodynamic-related
endpoint,  including,  any  study  in  non-human  primates  (whether  pharmacokinetic  or  not,  and  whether  or  not  conducted  under
GLP).

1.62    “ICH” means International Conference on Harmonisation.

1.63    “IND” means (a) an Investigational New Drug Application as defined in the FD&C Act and applicable regulations
promulgated  thereunder  by  the  FDA,  or  (b)  the  equivalent  application  to  the  equivalent  agency  in  any  other  regulatory
jurisdiction, the filing of which is necessary to Initiate or conduct a Clinical Trial of a pharmaceutical product in humans in such
jurisdiction.

1.64    “Indemnified Party” has the meaning set forth in Section 9.3.

1.65    “Indemnifying Party” has the meaning set forth in Section 9.3.

6

1.66    “Information” means any and all data, results, technology, business or financial information or information of any
type whatsoever, in any tangible or intangible form, including know-how, trade secrets, practices, techniques, methods, processes,
developments,  specifications,  formulations,  or  formulae  of  any  type  or  kind  (patentable  or  otherwise),  software,  algorithms,
marketing  reports,  expertise,  technology,  test  data  (including  pharmacological,  biological,  chemical,  biochemical,  clinical  test
data and data resulting from non-clinical studies), chemistry, manufacture and controls information, stability data and other study
data and procedures.

1.67        “Initiation”  means,  with  respect  to  a  Clinical  Trial,  the  first  dosing  of  the  first  subject  in  such  Clinical  Trial.

“Initiate” has a correlative meaning.

1.68    “Joint Program IP” has the meaning set forth in Section 7.1(b)(iii).

1.69    “Joint Program Patent” has the meaning set forth in Section 7.1(b)(iii).

1.70    “Joint Research Committee” or “JRC” has the meaning set forth in Section 4.10.

1.71    “JPC” means the committee described in Section 7.2(a)(vi).

1.72    “Knowledge”  means,  with  respect  to  Alpine,  the  actual  knowledge,  as  of  the  Effective  Date,  of  the  individuals

listed on Exhibit E exercising reasonably diligent inquiry of such individual’s direct reports.

1.73    “Laws” means any and all laws, statutes, rules, regulations, ordinances and other pronouncements having the effect
of law of any Regulatory Authority or other Governmental Authority, including federal, national, multinational, state, provincial,
county, city or other political subdivision.

1.74    “Lead Compound” means the lead [***] set forth on Exhibit F.

1.75        “Licensed  Compound”  means  (a)  any  Licensed  Existing  Program  Compound  or  (b)  Research  Program

Compound.

1.76    “Licensed Existing Program Compound”  means (a) [***] the  Lead  Compound,  any  Back-Up  Compound  and

any Horizon Reserved Sequences [***], or (b) [***].

1.77    “Licensed Existing Program Product” means any product containing or comprising a Licensed Existing Program
Compound,  alone  or  in  combination  with  one  or  more  other  active  ingredients,  in  any  and  all  forms,  presentations,  delivery
systems, dosages and formulations.

1.78    “Licensed Know-How”  means  any  and  all  Information  that  is  (a)  Controlled  by  Alpine  or  any  of  its  Affiliates
(subject  to  Section  2.7(b))  as  of  the  Effective  Date  or  at  any  time  during  the  Term,  and  (b)  [***]  for  the  Development,
Manufacturing, Commercialization, use, sale, offer for sale, importation or other exploitation of any Licensed Existing Program
Compound or Licensed Existing Program Product in the Field, including Alpine’s Sole Program IP and Alpine’s rights in any
Joint Program IP. Licensed Know-How shall include the Information listed on Exhibit G. With regard to any Information first
Controlled  by  Alpine  or  its  Affiliate  after  the  Query  Period  to  the  extent  that  it  is  specific  to  manufacturing,  formulation,  or
delivery technology generally applicable to other products of Alpine or such Affiliates as well

7

as to Licensed Existing Program Compounds or Licensed Existing Program Products, it will be Licensed Know-How only if it is
necessary for the Development, Manufacturing, Commercialization, use, sale, offer for sale, importation or other exploitation of
any Licensed Existing Program Compound (including as incorporated into a Licensed Existing Program Product) in the Field.

1.79        “Licensed  Patent”  means  any  Patent  that  is  (a)  Controlled  by  Alpine  or  any  of  its  Affiliates  (subject  to
Section 2.7(b)) as of the Effective Date or at any time during the Term (including Alpine’s Sole Program Patents and Alpine’s
rights in any Joint Program Patents), and (b) [***] for the Development, Manufacturing, Commercialization, use, sale, offer for
sale, importation or other exploitation of any Licensed Existing Program Compound (including as incorporated into a Licensed
Existing Program Product) in the Field, including any Patent claiming (i) any Licensed Existing Program Compound (including
Licensed Existing Program Compound contained in a Licensed Existing Program Product) in the Field, (ii) any (A) [***], or (B)
Horizon  Reserved  Sequences  that  are  part  of,  or  encode  any  part  of,  any  Licensed  Existing  Program  Compound,  or  (iii)  the
Manufacture or use of any Licensed Existing Program Compound (including Licensed Existing Program Compound contained in
a  Licensed  Existing  Program  Product).  The  Licensed  Patents  existing  as  of  the  Effective  Date  are  listed  on  Exhibit  H.  With
regard to any Patent first Controlled by Alpine or its Affiliate after the Query Period to the extent that it claims manufacturing,
formulation,  or  delivery  technology  generally  applicable  to  other  products  of  Alpine  or  such  Affiliates  as  well  as  to  Licensed
Existing Program Compounds or Licensed Existing Program Products, it will be a Licensed Patent only if it is necessary for the
Development,  Manufacturing,  Commercialization,  use,  sale,  offer  for  sale,  importation  or  other  exploitation  of  any  Licensed
Existing Program Compound (including as incorporated into a Licensed Existing Program Product) in the Field.

1.80    “Licensed Product” means (a) any Licensed Existing Program Product or (b) Research Program Product.

1.81    “Licensed Technology” means the Licensed Know-How and Licensed Patents.

1.82    “Manufacture” means all activities related to the manufacturing of any Licensed Compound or Licensed Product,
or  any  ingredient  thereof,  including  test  method  development,  analytical  testing  and  stability  testing,  formulation,  process
development, manufacturing scale-up, manufacturing any Licensed Compound or Licensed Product in bulk or finished form for
Development,  manufacturing  finished  Licensed  Product  for  Commercialization,  packaging,  in-process  and  finished  product
testing, release of Licensed Product or any component or ingredient thereof, quality assurance activities related to manufacturing
and  release  of  Licensed  Product,  and  regulatory  activities  related  to  any  of  the  foregoing.  “Manufacturing”  has  a  correlative
meaning.

1.83    “Net Sales” means, with respect to a given period of time after First Commercial Sale of a Licensed Product, gross
sales of such Licensed Product by Horizon, its Affiliates and Sublicensees (each a “Selling Party”) in such period, [***] by the
Selling Party across its operations:

(a)    [***];

(b)    [***];

(c)    [***];

8

(d)    [***];

(e)    [***];

(f)    [***];

(g)    [***];

(h)    [***].

Even  if  there  is  overlap  between  any  of  the  [***]  described  above,  [***].  For  purposes  of  determining  Net  Sales,  a  Licensed
Product  shall  be  deemed  to  be  sold  when  invoiced  and  a  sale  shall  not  include  [***].  [***]  shall  be  excluded  from  the
computation of Net Sales if [***], but [***] shall be included in the computation of Net Sales.

Notwithstanding the foregoing, in the event a Licensed Product is sold in a country in the Territory as a Combination Product,
Net Sales of the Combination Product will be calculated as follows:

(i)    If the Licensed Product (containing only a Licensed Compound and no other active pharmaceutical
ingredient) and the other active pharmaceutical ingredient(s) each are sold separately in such country, Net Sales will be calculated
by [***].

(ii)    If the Licensed Product is sold independently of the other active pharmaceutical ingredient(s) therein
in such country, but the other pharmaceutical ingredient(s) is not sold independently in such country, Net Sales will be calculated
by [***].

(iii)    If the Licensed Product is not sold independently of the other active pharmaceutical ingredient(s)
therein in such country, but the other active pharmaceutical ingredient(s) is sold independently in such country, Net Sales will be
calculated by [***].

(iv)    If the Licensed Product is not sold independently in such country and the other active pharmaceutical
ingredient(s)  is  not  sold  in  reasonable  quantities  independently  in  such  country,  the  Parties  shall  determine  Net  Sales  for  such
Combination Product by [***].

All  discounts,  allowances,  credits,  rebates  and  other  deductions,  to  the  extent  allocable  across  multiple  products  including  a
Licensed  Product,  shall  be  fairly  allocated  between  the  Licensed  Product  and  other  products  of  Horizon,  its  Affiliates  or
Sublicensees, so that the Licensed Product does not bear a disproportionate portion of such deductions.

1.84    “New Technology” has the meaning set forth in Section 2.7(b).

1.85    “Non-Breaching Party” has the meaning set forth in Section 11.3.

1.86        “Patents”  means  (a)  pending  patent  applications,  issued  patents,  utility  models  and  designs;  (b)  reissues,
substitutions,  confirmations,  registrations,  validations,  re-examinations,  additions,  continuations,  continued  prosecution
applications, continuations-in-part, or divisions of or to any of the foregoing; and (c) extensions, renewals or restorations of any
of  the  foregoing  by  existing  or  future  extension,  renewal  or  restoration  mechanisms,  including  supplementary  protection
certificates or the equivalent thereof.

9

1.87    [***].

1.88    [***].

1.89    [***].

1.90    [***].

1.91    [***].

1.92        “Person”  means  any  individual,  corporation,  company,  partnership,  association,  joint-stock  company,  trust,

unincorporated organization or government or political subdivision thereof.

1.93    “Phase 1 Clinical Trial” means a Clinical Trial of a Licensed Product conducted in healthy volunteer subjects or
patients with the disease or condition under study to evaluate the drug metabolism, pharmacologic actions, the side effects or, if
possible, to gain early evidence on the effectiveness of the Licensed Product, as and to the extent defined for the U.S. in 21 C.F.R.
§ 312.21(a), as amended from time to time, or equivalent law or regulation in regulatory jurisdictions outside the U.S.

1.94    “Phase 2 Clinical Trial” means a Clinical Trial of a Licensed Product conducted in patients with the disease or
condition  under  study  to  evaluate  dose  ranges,  pharmacodynamics,  biomarkers,  biological  activity  or  the  effectiveness  of  the
Licensed Product, as and to the extent defined for the U.S. in 21 C.F.R. § 312.21(b), as amended from time to time, or equivalent
law or regulation in regulatory jurisdictions outside the U.S.

1.95    “Phase 3 Clinical Trial” means a Clinical Trial of a Licensed Product with a defined dose or a set of defined doses
of such Licensed Product on sufficient numbers of human patients designed to confirm with statistical significance the safety and
efficacy of such Licensed Product and to support a Regulatory Approval, as and to the extent defined for the U.S. in 21 C.F.R.
§ 312.21(c), as amended from time to time, or equivalent law or regulation in regulatory jurisdictions outside the U.S.

1.96    “PHSA” means the United States Public Health Service Act, as amended from time to time.

1.97        “Pivotal  Clinical  Trial”  shall  mean  (a)  a  Phase  3  Clinical  Trial,  or  (b)  any  other  Clinical  Trial  of  a  Licensed
Product for which the applicable Regulatory Authority has agreed, whether before Initiation of such Clinical Trial (e.g., pursuant
to an agreement with or statement from the FDA or the EMA on a ‘Special Protocol Assessment’ or equivalent or other guidance
or  minutes  issued  by  the  FDA  or  EMA)  or  after  Initiation  of  such  Clinical  Trial  (e.g.,  based  on  an  interim  data  analysis),  is
sufficient to form the primary basis of an efficacy claim in a Regulatory Approval Application submission, regardless of whether
the  sponsor  of  such  trial  characterizes  or  refers  to  such  trial  as  a  [***]  trial  (or  otherwise)  in  the  applicable  protocol,  on
clinicaltrials.gov, or in any other context. If a Clinical Trial is determined by the applicable Regulatory Authority, after review of
the efficacy and safety data from a [***] Clinical Trial for the Licensed Product, to be sufficient to form the primary basis of an
efficacy claim in a Regulatory Approval Application submission (i.e. Clinical Trial constitutes a Pivotal Clinical Trial) without
the  need  for  a  Phase  3  Clinical  Trial(s)  prior  to  submission,  then,  for  purposes  of  Section  6.4,  the  Initiation  of  such  Pivotal
Clinical Trial shall be deemed to have occurred on the date of such determination by the applicable Regulatory Authority.

10

1.98    “Product Infringement” has the meaning set forth in Section 7.3(a).

1.99    “Product-Specific Claim” has the meaning set forth in Section 7.2(a)(i).

1.100    “Product-Specific Patent” has the meaning set forth in Section 7.2(a)(i).

1.101    “Program” means, individually and collectively, the Existing Program and the Research Program.

1.102    “Proposed Target” means any Target that is proposed by Horizon to be a Reserved Target.

1.103        “Prosecution  and  Maintenance”  means,  with  respect  to  any  Patent,  the  preparation,  filing,  prosecution  and
maintenance  (including  any  oppositions, 
interferences,  reissue  proceedings,  reexaminations,  post-grant  proceedings,
supplemental  examinations,  post  grant  review  proceedings,  inter  partes  review  proceedings,  patent  interference  proceedings,
opposition proceedings, derivation proceedings, reissue and reexamination, maintenance and defense) of or with respect to such
Patent. For clarity, “Prosecution and Maintenance” shall not include requests for Patent term extensions.

1.104    “Query(ies)” means each written request by Horizon specifying the qualities and characteristics with respect to a

particular [***] in regard to which Alpine will interrogate the Alpine Libraries.

1.105    “Query Period” means the period commencing on the Effective Date and ending [***].

1.106        “Regulatory  Approval”  means  all  approvals  from  the  relevant  Regulatory  Authority  in  a  given  country  or
regulatory  jurisdiction  of  the  Regulatory  Approval  Application  for  a  Licensed  Product  in  the  Field,  including  all  licenses,
registrations,  and  pricing  or  reimbursement  approvals,  that  are  necessary  to  initiate  the  sale  and  marketing  of  such  Licensed
Product, in such country or regulatory jurisdiction.

1.107    “Regulatory Approval Application” means an application to the appropriate Regulatory Authority for approval

to sell a Licensed Product in any particular jurisdiction, including a New Drug Application in the U.S.

1.108    “Regulatory Authority” means, in a particular country or jurisdiction, any applicable Governmental Authority
that  has  the  authority  to  regulate  the  manufacture,  marketing,  testing,  pricing,  or  sale  of  drug  products  in  such  country  or
jurisdiction.

1.109        “Regulatory  Exclusivity”  means  any  exclusive  marketing  rights  or  data  exclusivity  rights  conferred  by  any
Governmental Authority under applicable Law with respect to a Licensed Product in a country or jurisdiction in the Territory to
prevent  Third  Parties  from  Commercializing  such  Licensed  Product  in  such  country  or  jurisdiction,  other  than  a  Patent  right,
including orphan drug exclusivity, pediatric exclusivity, rights conferred in the U.S. under the Hatch-Waxman Act or the FDA
Modernization  Act  of  1997,  in  the  EU  under  Directive  2001/83/EC,  or  rights  similar  thereto  in  other  countries  or  regulatory
jurisdictions in the Territory.

1.110        “Regulatory  Materials”  means  regulatory  applications,  submissions,  notifications,  communications,
correspondence,  registrations,  Regulatory  Approvals  or  other  filings  made  to,  received  from  or  otherwise  conducted  with  a
Regulatory Authority in order to

11

Develop, Manufacture, or Commercialize a Licensed Product in a particular country or jurisdiction.

1.111    “Research Plan”  means,  with  respect  to  any  Research  Program  Target(s),  the  plan  agreed  to  by  the  Parties  in
writing  setting  forth  certain  research  activities  to  be  conducted  by  Alpine,  the  associated  budget  and  Research  Program
Deliverables. The initial Research Plan is attached hereto as Exhibit I.

1.112    “Research Program” has the meaning set forth in Section 4.1.

1.113    “Research Program Compound” means (a) any molecule or compound that contains, comprises or incorporates

(i) [***] (ii) [***] (b) [***]

1.114        “Research  Program  Deliverables”  means,  with  respect  to  any  Research  Program,  the  Research  Program
Libraries, including proteins, molecules and sequences contained therein, data, and types and quantities of molecules, controls,
plasmids, and proteins to be provided for such Research Program as agreed in the Research Plan.

1.115    “Research Program IP” has the meaning set forth in Section 7.1(c)(i).

1.116    “Research Program Libraries” means, with respect to any Research Program Target(s), the libraries of proteins

and molecules[***].

1.117    “Research Program Patents” has the meaning set forth in Section 7.1(c)(ii).

1.118        “Research Program Product”  means  any  product  containing  or  comprising  a  Research  Program  Compound,
alone or in combination with one or more other active ingredients, in any and all forms, presentations, delivery systems, dosages
and formulations.

1.119        “Research  Program  Target”  means  any  Reserved  Target  selected  by  Horizon  for  a  research  program  to  be

conducted in accordance with Article 4, unless and until replaced pursuant to Section 4.2.

1.120    “Research Program Term” has the meaning set forth in Section 4.6.

1.121    “Research Specifications” has the meaning set forth in Section 4.5.

1.122    “Reserved Target” means any of the Targets on the Reserved Target List provided by Horizon to the Gatekeeper,

as such list may be amended pursuant to Section 4.2.

1.123    “Royalty Term” has the meaning set forth in Section 6.6(b).

1.124    “Selection Period” has the meaning set forth in Section 4.2(b).

1.125    [***].

1.126    “Sole Program IP” has the meaning set forth in Section 7.1(b)(ii).

1.127    “Sole Program Patent” has the meaning set forth in Section 7.1(b)(ii).

1.128    “SPA” has the meaning set forth in Section 6.2.

12

1.129    “Specifications” has the meaning set forth in Section 3.1.

1.130    “Subcontractors” has the meaning set forth in Section 2.1(b).

1.131    “Subject Patent” has the meaning set forth in Section 7.4.

1.132        “Sublicensee”  means  any  Third  Party  to  whom  Horizon  grants  a  sublicense  of  the  license  granted  in  Section

2.2(a) or a license under any Research Program IP with respect to any Research Program Product.

1.133    “Substitution Notice” has the meaning set forth in Section 2.3(b).

1.134    “Target” means any [***].

1.135    “Term” has the meaning set forth in Section 11.1.

1.136    “Territory” means worldwide.

1.137    “Third Party” means any entity other than Alpine or Horizon or an Affiliate of either of them.

1.138    “U.S.” means the United States of America, including all possessions and territories thereof.

1.139    “Valid Claim” means a claim [***].

1.140    “Variant” [***].

1.141    “VAT”  means  value  added  tax,  sales  taxes,  consumption  taxes  and  other  similar  taxes  imposed  or  required  by

applicable Law.

2.1    Research License.

ARTICLE 2
LICENSES

(a)    Non-Exclusive License to Use the Alpine Libraries. Subject to the terms and conditions of this Agreement,
Alpine hereby grants to Horizon a non-exclusive license to access the Alpine Libraries and use the proteins and molecules within
the  Alpine  Libraries  (i)  to  research,  discover  and  identify  [***]  for  further  Development  as  Licensed  Existing  Program
Compounds [***] or (ii) [***] in connection with the activities in clause (i) and the exercise of the rights granted in Section 2.2
with respect to any Licensed Existing Program Compounds resulting from the activities in clause (i) [***]. For clarity, Horizon
may  use  the  proteins  and  molecules  within  the  Alpine  Libraries  as  permitted  by  the  proceeding  sentence  and  [***];  however,
Horizon shall not use the Alpine Libraries or proteins or molecules therein to develop any [***]. Alpine will disclose to Horizon
the Alpine Libraries on the Effective Date [***].

(b)        Subcontractors.  Horizon  shall  have  the  right  to  utilize  its  Affiliates  and  Third  Party  subcontractors
(“Subcontractors”)  to  perform  activities  set  forth  in  Section  2.1(a)  for  or  on  behalf  of  Horizon,  subject  to  the  terms  and
conditions set forth in Section 2.4(b).

2.2    Exclusive Development and Commercialization License.

13

(a)    Exclusive License Grant. Subject to the terms and conditions of this Agreement, Alpine hereby grants to
Horizon an exclusive (even as to Alpine and its Affiliates), royalty-bearing license, with the right to sublicense as provided in
Section 2.4, under the Licensed Technology, to Develop, Manufacture, Commercialize, make, have made, use, sell, offer for sale,
import and otherwise exploit Licensed Existing Program Compounds and Licensed Existing Program Products in the Field in the
Territory. For clarity, no license whatsoever (whether to Information or intellectual property) is granted by Alpine with respect to
any active pharmaceutical ingredient(s) or other subject matter that is Controlled by Alpine or its Affiliates incorporated in any
Licensed  Existing  Program  Product  other  than  the  Licensed  Existing  Program  Compound(s)  contained  in  or  comprising  such
Licensed Existing Program Product.

(b)    Subcontractors. Horizon shall have the right to utilize its Affiliates and Subcontractors to perform activities

set forth in Section 2.2(a) for or on behalf of Horizon, subject to the terms and conditions set forth in Section 2.4(b).

2.3    Use and Restrictions on [***] in Alpine Libraries.

(a)        Alpine  Right  to  Use.  Subject  to  this  Section  2.3  and  the  limitations  in  Section  2.8,  and  excluding  any
Horizon Reserved Sequences, Alpine shall retain the right to use all other [***] in the Alpine Libraries to generate compounds
(excluding any [***]) for Alpine’s other programs. Alpine may update the list of Alpine Reserved Sequences on Exhibit A upon
written notice to Horizon to add any such [***] in the Alpine Libraries (subject to the limitations in Section 2.8, and [***].

(b)    Horizon Reserved Sequences. The [***] that are part of, or encode any part of, the Lead Compound and
any [***] that are part of, or encode any part of, the Back-Up Compounds are referred to as “Horizon Reserved Sequences”.
[***]  Alpine  shall  deliver  the  Horizon  Reserved  Sequences  to  Horizon  together  with  the  Lead  Compound  and  the  Back-Up
Compounds  in  accordance  with  Section  3.1.  With  regard  to  any  [***]  identified  from  the  Alpine  Libraries  during  the  Query
Period that Horizon selects to substitute for a Horizon Reserved Sequence in accordance with this Section 2.3(b), [***].

2.4    Sublicensing and Subcontracting Rights.

Affiliates or Sublicensees, subject to the following:

(a)    Sublicenses. Horizon shall have the right to grant sublicenses of the license granted in Section 2.2(a) to its

failures by its Affiliates and Sublicensees to comply with the applicable terms of this Agreement;

(i)        Horizon  shall  remain  responsible  for  the  performance  of  its  obligations  hereunder  and  any  and  all

(ii)    such sublicense shall be granted pursuant, and subject to, a written agreement that is consistent with
the  terms  and  conditions  of  this  Agreement  and  Horizon  shall  contractually  require  that  its  Sublicensees  comply  with  the
applicable terms and conditions of this Agreement;

(iii)    Horizon shall provide  to  Alpine  a  fully  executed  copy  of  each  agreement  pursuant to which such
sublicense is granted promptly after execution, which may be redacted with respect to matters unnecessary to show compliance
herewith; and

(iv)    [***]

14

(b)    Subcontractors. Horizon (and its Affiliates and Sublicensees) shall have the right to retain and authorize
Subcontractors  to  perform  any  activity  in  connection  with  Horizon’s  (or  its  Affiliate’s  or  Sublicensee’s)  exercise  of  any  of  its
rights or performance of any of its obligations hereunder, where such activity is to be performed at the direction and control and
for  the  sole  benefit  of  Horizon,  its  Affiliates  or  Sublicensees.  Such  retention  of  such  Subcontractor  shall  not  be  a  sublicense
within the meaning of this Section 2.4 but shall be considered an activity of Horizon under the license granted in Section 2.2(a).
Horizon  shall  remain  liable  to  Alpine  for  any  act  or  omission  of  its  Subcontractors  and  any  and  all  failures  by  such
Subcontractors to comply with the terms of this Agreement.

2.5        Disclosure  of  Licensed  Know-How.  Alpine  will  promptly  transfer  to  Horizon  all  Licensed  Know-How
(a) promptly following the Effective Date to the extent then existing, (b) generated during the activities conducted pursuant to the
Deliverables Plan, as applicable, [***] following completion of such activities, and (c) [***].

2.6        Retained  Rights;  No  Implied  Licenses.  Except  as  expressly  granted  under  Sections  2.1  and  2.2  and  subject  to
Sections 2.3 and 2.8, Alpine retains all rights under the Licensed Technology, including the right to fulfill Alpine’s obligations
under this Agreement. Except as explicitly set forth in this Agreement, neither Party shall be deemed by estoppel or implication
to have granted the other Party any license or other right to any intellectual property of such Party.

2.7    Third Party Agreements.

(a)    During the Term, if Alpine or its Affiliate is planning to enter into an agreement with a Third Party under
which  Alpine  or  its  Affiliate  obtains  a  license  or  rights  to  Information  or  Patents  that  are  necessary  for  the  Development
Manufacture or Commercialization of one or more Licensed Compounds (including as incorporated into Licensed Products), then
Alpine shall provide Horizon with written notice thereof. [***].

(b)    During the Term, subject to Section 2.7(a), if Alpine or any of its Affiliates enters into an agreement with a
Third Party under which Alpine or its Affiliate obtains a license or rights, with the right to sublicense, to Information or Patents
that would fall within the definition of Licensed Know-How or Licensed Patents (“New Technology”) (each such agreement, an
“Alpine Third Party Agreement”), then Alpine shall inform Horizon and shall provide Horizon with a copy of the Alpine Third
Party Agreement, which may be redacted if necessary to exclude only confidential terms that would not be relevant to any rights
or obligations of Horizon. [***].

2.8    Exclusivity and Non-Compete.

(a)    During the Term, except for the activities conducted and rights granted to Horizon by Alpine with respect to
Licensed Compounds and Licensed Products as expressly provided in this Agreement, Alpine and its Affiliates shall not conduct
or participate in, or license, sublicense or enable any Third Party to conduct or participate in, the development, manufacture or
commercialization of, or research for the intended purpose of identifying or discovering, [***].

(b)        Notwithstanding  the  provisions  of  Section  2.8(a),  in  the  event  that  after  the  Effective  Date,  a  Change  of
Control of Alpine occurs and the Acquiror in such Change of Control (or any of its Affiliates existing prior to such Change of
Control that are not combined with Alpine or any of its Affiliates in or after such Change of Control) is as of the effective date

15

of such Change of Control or thereafter developing or commercializing a Competing Product, [***].

(c)        Covenants.    Horizon  agrees  on  behalf  of  itself  and  its  Affiliates  not  to  (i)  Develop,  Manufacture,
Commercialize  or  otherwise  exploit  any  Licensed  Existing  Program  Product  for  any  oncology  application  or  (ii)  enable,
(sub)license or authorize any Third Party to take any action prohibited by clause (i) (it being understood that nothing can prevent
off-label use). Alpine agrees on behalf of itself and its Affiliates not to (A) Develop, Manufacture, Commercialize or otherwise
exploit  any  Licensed  Product  for  any  application  or  (B)  enable,  (sub)license  or  authorize  any  Third  Party  to  take  any  action
prohibited by clause (A).

ARTICLE 3
EXISTING PROGRAM

3.1       Alpine  Deliverables  and  Responsibilities.  The  Parties  have  agreed  to  the  initial  Deliverables  Plan  attached  as
Exhibit C as of the Effective Date, and during the Query Period, the Parties may mutually agree in writing to enter into one or
more  additional  Deliverables  Plans.  Alpine  shall  conduct  the  activities,  with  the  objective  of  delivering  the  Deliverables,  as
contemplated by and in accordance with the Deliverables Plan. The Deliverables Plan shall provide the specific Queries Alpine is
to  use  in  identifying  [***]  from  the  Alpine  Libraries  and  the  specifications  and  quality  details  as  to  each  Deliverable
(“Specifications”). Alpine shall provide Horizon the Deliverables within [***] of completion of the applicable Deliverables Plan.
Alpine shall provide Deliverables that meet the Specifications.

3.2    Records; Updates. Alpine shall maintain complete, current and accurate records of all activities conducted pursuant
to the Deliverables Plan, and all data and other information resulting from such Deliverables Plan activities. Such records shall
properly reflect all work performed and results achieved in the performance of such Deliverables Plan activities in good scientific
manner appropriate for regulatory purposes.

3.3    Costs and Payment for Deliverables.  Horizon  shall  pay  Alpine  for  [***].  Payment  for  [***]  will  be  subject  to
Horizon’s prior written consent. Alpine shall submit [***] to be paid by Horizon in accordance with the Deliverables Budget, and
payment is due within [***] of Horizon’s receipt of the applicable invoice.

3.4        Subcontractors.  Alpine  shall  have  the  right  to  engage  Subcontractors  to  perform  any  portion  of  its  obligations
under the Deliverables Plan; provided that (a) Alpine shall promptly provide Horizon notice thereof, and (b) each Subcontractor
shall be required to agree in writing to be bound by terms with respect to (i) maintenance of the confidentiality of Confidential
Information that are no less stringent than those contained in this Agreement and (ii) ownership of intellectual property that are
consistent  with  those  contained  in  this  Agreement.  Alpine  shall  remain  liable  to  Horizon  for  any  act  or  omission  of  its
Subcontractors and any and all failures by such Subcontractors to comply with the terms of this Agreement.

ARTICLE 4
RESEARCH PROGRAMS

4.1    Overview. During the Research Program Term, the Parties shall conduct a research collaboration pursuant to which
Horizon will select one or more Research Program Targets pursuant to Section 4.2 for a particular research program and Alpine
will  conduct  research  using  its  proprietary  technologies  to  discover  proteins  and  molecules,  including  Variants,  and  genetic
sequences for such proteins, molecules and Variants, designed to have

16

specified  attributes  and  biological  functions  in  accordance  with  the  Research  Plan  with  respect  to  such  Research  Program
Target(s)  (the  program  for  research  with  respect  to  such  Research  Program  Target(s),  a  “Research  Program”).  For  clarity,  a
given  Research  Program  may  be  for  the  purpose  of  discovering  Research  Program  Compounds  with  respect  to  one  Research
Program Target or with respect to multiple Research Program Targets.

4.2    Selection of Research Program Targets for a Research Program.

(a)    Schedule for Initial Selection. Horizon will use reasonable efforts to select one or more Reserved Targets
(after  discussion  with  Alpine  through  the  JRC)  as  initial  Research  Program  Targets  for  a  Research  Program  pursuant  to  the
following  schedule,  as  may  be  modified  by  written  agreement  of  the  Parties;  provided  that  nothing  in  this  Section  4.2(a)  is
intended to limit Horizon’s ability to replace Research Program Targets in accordance with Section 4.2(c):

Research Program
First Research Program
Second Research Program
Third Research Program

[***]
[***]
[***]

Timing for Initial Selection

(b)    Selection of Research Program Targets for a Research Program. At any time [***] (“Selection Period”),
subject  to  the  schedule  for  initial  selection  in  Section  4.2(a),  Horizon  may,  upon  written  notice  to  Alpine  and  the  Gatekeeper,
(i) select any one or more Reserved Targets as Research Program Targets for a Research Program upon written notice to Alpine
and the Gatekeeper or (ii) [***].

(c)    Changes to Reserved Targets. During the Selection Period, Horizon may submit any Proposed Target(s) as
proposed additional or replacement Reserved Target(s) by providing written notice to the Gatekeeper; [***]. Within [***] from
receipt of such notice, the Gatekeeper, by reviewing the Excluded Target List, shall inform Horizon whether there is a Conflict
with respect to the Target(s) based on the Excluded Target List. If there is no Conflict, the Proposed Target(s) will automatically
become Reserved Target(s) and if such Target(s) replace any other Reserved Target(s), such replaced Target(s) shall cease to be
Reserved  Target(s).  After  the  Selection  Period,  Horizon  shall  no  longer  have  any  right  to  select  any  Reserved  Target(s)  as
Research  Program  Target(s).  At  the  end  of  the  Selection  Period,  only  Targets  that  are  then  Research  Program  Targets  shall
continue to be Reserved Targets. Horizon may, at any time after the Effective Date, provide written notice to the Gatekeeper that
a Target is no longer a Reserved Target.

(d)    Excluded Target List. Following the Effective Date, Alpine shall be permitted to add new Targets to the
Excluded  Target  List  by  providing  written  notice  to  the  Gatekeeper,  in  accordance  with  this  Section  4.2(d),  and  provided  that
[***].

4.3        Research  Plan.  The  Parties  will  review  and  update  the  Research  Plan  for  a  Research  Program  as  appropriate
promptly following selection of the Research Program Target(s). The JRC shall review the Research Plan no less than [***] or on
such other interval mutually agreed to by the Parties.

4.4    Conduct of Research Program. The Parties shall in good faith conduct the work to be performed by each of them

as set out in the applicable Research Plan during the Research

17

Program  Term,  using  their  respective  Commercially  Reasonable  Efforts  to  accomplish  the  objectives  of  the  Research  Plan  in
accordance with the terms of this Agreement. [***] After delivery of the Research Program Deliverables by Alpine to Horizon,
Horizon will be solely responsible for further development; [***].

4.5    Research Program Deliverables. Alpine shall conduct the activities and deliver the Research Program Deliverables
contemplated by and in accordance with the Research Plan. The Research Plan shall provide specifications and quality details
(“Research  Specifications”)  as  to  each  Research  Program  Deliverable.  Alpine  shall  provide  Horizon  the  Research  Program
Deliverables as specified in the Research Plan meeting the Research Specifications; provided that, if Alpine [***].

4.6    Research Program Term. The term of the Research Programs shall commence on the Effective Date and continue
until (a) the end of the Selection Period if [***], (b) the end of the Selection Period if [***], or (c) [***] after the end of the
Selection  Period,  [***]  (“Research  Program  Term”).  The  Research  Program  Term  may  be  extended  by  mutual  written
agreement  of  the  Parties,  and  the  corresponding  Research  Plan  and,  as  applicable,  the  associated  budget  therewith  shall  be
amended to reflect the extension.

4.7        Subcontractors.  Alpine  shall  have  the  right  to  engage  Subcontractors  to  perform  any  portion  of  its  obligations
under  any  Research  Plan;  provided  that  (a) Alpine  shall  promptly  provide  Horizon  notice  thereof,  and  (b)  each  Subcontractor
shall be required to agree in writing to be bound by terms with respect to (i) maintenance of the confidentiality of Confidential
Information that are no less stringent than those contained in this Agreement and (ii) ownership of intellectual property that are
consistent  with  those  contained  in  this  Agreement.  Alpine  shall  remain  liable  to  Horizon  for  any  act  or  omission  of  its
Subcontractors and any and all failures by such Subcontractors to comply with the terms of this Agreement.

4.8    Records and Reports.

(a)        Records.  Each  Party  shall  maintain  complete,  current  and  accurate  records  of  all  activities  conducted
pursuant  to  any  Research  Plan,  and  all  Information  resulting  from  such  Research  Plan  activities.  Such  records  shall  properly
reflect  all  work  performed  and  results  achieved  in  the  performance  of  such  Research  Plan  activities  in  good  scientific  manner
appropriate for regulatory and patent purposes, including the work done and results achieved by any Affiliate or Third Party on
behalf of such Party. During each JRC meeting, each Party shall provide the JRC with an update on the progress of Research Plan
activities and any Information generated from such Research Plan activities since the prior JRC meeting.

(b)    Copies and Inspection of Records. Horizon shall have the right, during normal business hours and upon
reasonable  advance  written  notice  not  more  than  [***]  (unless  such  audit  shows  cause  for  any  additional  audit(s)  during  such
period),  to  (i)  [***]  in  a  manner  intended  to  minimize  any  disruption  of  and  interference  with  Alpine’s  or  its  Subcontractor’s
operations and subject to such Horizon personnel agreeing to be bound by the rules applicable to such facility.

(c)    Quarterly Reports. At least [***] before each JRC meeting (but not more often than [***], Alpine shall
provide to Horizon a written progress report in English which shall describe the work performed since the last such update on the
Research Programs by or on behalf of Alpine, evaluate such work performed in relation to the goals of the Research Programs
and provide such other information as may be necessary for the conduct of the Research Programs or reasonably requested by
Horizon relating to the progress of the goals or performance of the

18

Research Programs. For clarity, all such reports shall be considered the Confidential Information of both Parties.

4.9        Research  Costs.  Horizon  shall  pay  Alpine  for  the  costs  and  expenses  for  conducting  the  activities  under  any
Research Plan [***]. Payment for additional costs and expenses will be subject to Horizon’s prior written consent. Alpine shall
submit  an  invoice  for  such  costs  and  expenses  [***],  and  payment  is  due  within  [***]  of  Horizon’s  receipt  of  the  applicable
invoice.

4.10        Joint  Research  Committee.  Within  [***]  after  the  Effective  Date,  the  Parties  shall  establish  a  joint  research
committee  (the  “Joint  Research  Committee”  or  “JRC”).  The  JRC  shall  consist  of  [***]  members  from  each  Party  (or  such
other  number  as  agreed  to  by  the  Parties),  and  each  Party  may  replace  any  of  its  members  of  the  JRC  from  time  to  time  by
providing prior written notice (which may be by email) to the other Party. The JRC will have [***]. The chairpersons shall be
responsible for calling and convening meetings but shall have no special authority over the other members of the JRC and shall
have no additional voting rights.

(a)        Specific  Responsibilities  of  the  JRC.  The  JRC  shall  serve  as  a  forum  for  overseeing  and  governing  the
Research Programs in accordance with the procedures set forth in this Section 4.10 and any other procedures as agreed upon by
the JRC members. Except as otherwise provided herein, the role of the JRC shall be to:

activities conducted under the Research Programs;

(i)    exchange information and facilitate discussions and cooperation between the Parties with respect to

(ii)    monitor, review and record the progress of the Research Programs;

criteria for Research Program Deliverables;

(iii)    review and approve any Research Plans or updates or amendments to the Research Plans, including

(iv)    facilitate the activities of the Gatekeeper; and

(v)    carry out any other functions delegated to it by the Parties.

(b)    Meetings; Minutes. The JRC shall meet regularly, and at least [***], during the Research Program Term, or
as otherwise agreed upon by the Parties. JRC meetings may be held in person or by audio or video conference as the Parties may
mutually agree. In-person meetings shall be held at locations alternately selected by the Parties. The JRC chairpersons shall be
responsible  for  calling  meetings  on  no  less  than  [***]  notice.  The  Parties  shall  alternate  for  each  JRC  meeting  to  have  their
chairperson (or designate): (i) prepare and circulate an agenda (requested by any member of either Party) reasonably in advance
of  the  upcoming  meeting;  and  (ii)  prepare  and  issue  minutes  of  the  JRC  meeting  as  promptly  as  practicable  thereafter.  Such
minutes  shall  not  be  finalized  until  the  chairperson  of  the  non-preparing  Party  reviews  and  approves  such  minutes  in  writing.
Employees or consultants of either Party who are not representatives of the Parties on the JRC may attend meetings of the JRC;
provided that (A) such attendees shall be bound by obligations of confidentiality and non-disclosure that are at least as stringent
as the provisions of Article 10, and (B) attendance of any non-employee must be pre-approved by the other Party, such approval
not  to  be  unreasonably  withheld,  conditioned  or  delayed.  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 in, the JRC.

19

(c)        Decision-Making.  The  JRC  will  use  good  faith  efforts  to  make  all  decisions  within  its  authority  by
consensus. Actions to be taken by the JRC shall be taken only following [***], with Alpine’s representatives collectively having
[***]  and  Horizon’s  representatives  collectively  having  [***].  If  the  JRC  fails  to  reach  agreement  on  a  matter  before  it
concerning Section 4.10(a), either Party may submit such matter for resolution to the Parties’ executive officers in accordance
with the provisions of Section 12.1(c). If  the  executive  officers  are  unable  to  resolve  a  matter  within  the  authority  of  the  JRC
within [***] (or such other period as may be agreed by the Parties in writing) after such referral, [***].

(d)    Limitations on Authority. The JRC shall only have the powers expressly assigned to it in this Agreement
and  shall  not  have  the  authority  to:  (i)  modify  or  amend  the  terms  and  conditions  of  this  Agreement;  (ii)  waive  either  Party’s
compliance with the terms and conditions of this Agreement; or (iii) determine any such issue in a manner that would conflict
with the express terms and conditions of this Agreement. 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  the  Parties
expressly so agree in writing.

the Parties, the JRC will be dissolved.

(e)    Discontinuation of the JRC. Upon completion of the Research Program Term, unless agreed in writing by

ARTICLE 5
DEVELOPMENT, MANUFACTURE, REGULATORY AND COMMERCIALIZATION

5.1        Horizon  Rights  and  Responsibilities.  Without  limiting  Section  5.3,  Horizon  (itself  and  with  its  Affiliates  and
Sublicensees)  shall  have  the  sole  right  and  responsibility,  in  its  sole  discretion  and  at  its  expense,  for  all  aspects  of  the
Development,  Manufacturing,  and  Commercialization  of  the  Licensed  Compounds  and  Licensed  Products  in  the  Territory,
including  all  decisions  regarding  the  clinical  development  plan  and  regulatory  strategy,  design,  sale,  price  and  promotion,  of
Licensed Compounds and Licensed Products. Without limiting the foregoing or Section 5.3, Horizon (itself and with its Affiliates
and Sublicensees) shall have the sole right and responsibility, in its sole discretion and at its expense, for preparing, filing and
maintaining all Regulatory Materials for Licensed Compounds and Licensed Products with applicable Regulatory Authorities in
the Territory, and Horizon shall own all Regulatory Materials (including all INDs, NDAs, Regulatory Approval Applications and
Regulatory Approvals) for Licensed Compounds and Licensed Products in the Territory and otherwise shall be responsible for all
regulatory matters with respect to Licensed Compounds and Licensed Products in the Territory. Horizon shall be responsible for
creating and maintaining a global safety database for Licensed Compounds and Licensed Products in the Territory, at Horizon’s
expense  and  for  reporting  quality  complaints,  adverse  events  and  safety  data  related  to  Licensed  Compounds  and  Licensed
Products  to  applicable  Regulatory  Authorities  in  the  Territory,  as  well  as  responding  to  safety  issues  and  to  all  requests  of
Regulatory Authorities relating to Licensed Compounds and Licensed Products in the Territory.

5.2       Alpine  Support.  Prior  to  the  [***]  of  the  Effective  Date,  Horizon  may  request  that  Alpine  (a)  [***].  Any  such
reasonable assistance and cooperation and attendance at regulatory meetings provided by Alpine pursuant to this Section 5.2 shall
be [***].

5.3    Diligence. Horizon shall use Commercially Reasonable Efforts to Develop, seek Regulatory Approval for and, if

Regulatory Approval is obtained, [***].

20

5.4        Communication.  With  respect  to  Licensed  Existing  Program  Products,  [***],  Horizon  shall  provide  Alpine  a
summary [***] of material developments with respect to Licensed Existing Program Products, [***]. With respect to Research
Program Products on a Research Program-by-Research Program basis, [***] and [***], Horizon shall provide Alpine a summary
[***] of the clinical and regulatory status of such Research Program Product, [***]. All reports and other Information provided
by Horizon under this Section 5.4 will be Horizon’s Confidential Information, subject to the terms of Article 10.

ARTICLE 6
FINANCIAL TERMS

6.1    Upfront Payment. Within [***] after the Effective Date, Horizon shall pay to Alpine a one-time, non-refundable

and non-creditable upfront license payment of twenty-five million Dollars ($25,000,000).

6.2    Equity Consideration. Concurrent with the execution and delivery of this Agreement, the Parties shall enter into a
stock purchase agreement (the “SPA”), pursuant to which Horizon shall agree to purchase fifteen million Dollars ($15,000,000)
in equity of Alpine at a twenty-five percent (25%) premium over the thirty (30) day volume weighted average price ending five
(5) trading days before the announcement of this Agreement all on the terms and conditions set forth in the SPA.

6.3    Pre-clinical Milestone Payment.

(a)    Existing Program. Within [***] of the [***] for the first Licensed Existing Program Compound, Horizon

shall pay to Alpine a [***] of [***]. For clarity, this milestone payment shall only be payable once.

(b)    Research Program.  Within  [***]  of:  (i)  the  [***]  for  the  first  Research  Program  Compound  for  a  given
Research Program and (ii) the delivery of Research Program Deliverables for such Research Program Compound, Horizon shall
pay to Alpine a one-time, non-refundable and non-creditable payment of [***]. For clarity, this milestone payment shall only be
payable once per Research Program for up to three (3) separate Research Programs, and the total amount of milestone payments
made by Horizon to Alpine under this Section 6.3(b) if this milestone event is achieved for three (3) Research Programs shall in
no event exceed [***].

6.4    Development and Regulatory Milestone Payments.

(a)    Existing Program. Within [***] after the first achievement by a Licensed Existing Program Product of any
development  and  regulatory  milestone  event  set  forth  below,  Horizon  shall  pay  to  Alpine  the  corresponding  one-time,  non-
refundable, non-creditable development and regulatory milestone payment specified below. For clarity, each milestone payment
below shall only be  payable  once,  and  the  total  amount  of  milestone  payments made by Horizon to Alpine under this Section
6.4(a) shall in no event exceed [***].

21

Milestone Event

[***]
[***]
[***]
[***]
[***]

Milestone Payment
[***]
[***]
[***]
[***]
[***]

(b)    Research Program. Within  [***]  after  the  first  achievement  by  a  Research  Program  Product  for  a  given
Research  Program  of  any  development  and  regulatory  milestone  event  set  forth  below,  Horizon  shall  pay  to  Alpine  the
corresponding  one-time,  non-refundable,  non-creditable  development  and  regulatory  milestone  payment  specified  below.  For
clarity, each milestone payment below shall only be payable once per Research Program for up to three (3) separate Research
Programs,  and  the  total  amount  of  milestone  payments  made  by  Horizon  to  Alpine  under  this  Section  6.4(b)  for  a  Research
Program, if all milestone events are achieved for such Research Program, shall in no event exceed [***], and, if all milestone
events  are  achieved  for  three  (3)  Research  Programs,  shall  in  no  event  exceed  [***].  Milestone  events  and  payments  will  be
determined separately for each Research Program.

Milestone Event

[***]
[***]
[***]
[***]
[***]

6.5    Sales Milestones.

Milestone Payment
[***]
[***]
[***]
[***]
[***]

(a)        Existing Program. Within  [***]  after  the  Calendar  Quarter  in  which  any  sales  milestone  event  set  forth
below is achieved by any Licensed Existing Program Product(s), Horizon shall make the corresponding one-time, non-refundable
(except  as  set  forth  in  Section  6.10),  non-creditable  sales  milestone  payment  to  Alpine  specified  below.  For  clarity,  each
milestone payment below shall only be payable once, and the total amount of milestone payments made by Horizon to Alpine
under this Section 6.5 shall in no event exceed [***].

Milestone Event

[***]
[***]
[***]
[***]

Milestone Payment
[***]
[***]
[***]
[***]

(b)    Research Program. Within [***] after the Calendar Quarter in which any sales milestone event set forth

below is achieved by any Research Program Product(s) for a given

22

Research  Program,  Horizon  shall  make  the  corresponding  one-time,  non-refundable  (except  as  set  forth  in  Section  6.10),  non-
creditable sales milestone payment to Alpine specified below. For clarity, each milestone payment below shall only be payable
once per Research Program for up to three (3) separate Research Programs, and the total amount of milestone payments made by
Horizon to Alpine under this Section 6.5(b) for a Research Program, if all milestone events are achieved for a Research Program,
shall in no event exceed [***] per Research Program, and, if all milestone events are achieved for three (3) Research Programs,
shall in no event exceed [***]. Milestone events and payments will be determined separately for each Research Program.

Milestone Event

[***]
[***]
[***]
[***]

6.6    Royalties

(a)    Royalty Rates.

Milestone Payment
[***]
[***]
[***]
[***]

(i)    Licensed Existing Program Products. Subject to this Section 6.6, in each Calendar Quarter during
the Royalty Term applicable to Licensed Existing Program Products, Horizon shall pay to Alpine non-creditable, non-refundable
(except  as  set  forth  in  Section  6.10)  [***]  on  annual  Net  Sales  of  Licensed  Existing  Program  Products  in  the  Territory,  as
calculated  by  multiplying  the  applicable  royalty  rate  by  the  corresponding  amount  of  incremental  Net  Sales  of  such  Licensed
Existing Program Products in the Territory in each Calendar Year, as follows:

Annual Net Sales of Licensed Existing Program Products

[***]
[***]
[***]
[***]

Royalty Rate
[***]
[***]
[***]
[***]

(ii)        Research  Program  Products.  Subject  to  this  Section  6.6,  in  each  Calendar  Quarter  during  the
Royalty  Term  applicable  to  the  Research  Program  Products  for  a  given  Research  Program,  Horizon  shall  pay  to  Alpine  non-
creditable, non-refundable (except as set forth in Section 6.10) royalties on annual Net Sales of such Research Program Products
in the Territory, as calculated by multiplying the applicable royalty rate by the corresponding amount of incremental Net Sales of
such  Research  Program  Products  in  the  Territory  in  each  Calendar  Year,  as  follows,  with  Net  Sales  and  royalties  determined
separately for each Research Program:

23

Annual Net Sales of Research Program Products

[***]
[***]
[***]
[***]

Royalty Rate
[***]
[***]
[***]
[***]

(b)    Royalty Term. Royalties shall be paid under this Section 6.6(b), (i) on a Licensed Existing Program Product-
by-Licensed Existing Program Product and country-by-country basis, commencing on the First Commercial Sale of a Licensed
Existing Program Product in a country and ending on the later of (A) [***], (B) [***] and (C) the [***] anniversary of the First
Commercial  Sale  of  such  Licensed  Existing  Program  Product  in  such  country,  or  (ii)  on  a  [***],  commencing  on  the  First
Commercial Sale of a Research Program Product in a country and ending on the later of (A) [***], (B) [***], and (C) the [***]
anniversary  of  the  First  Commercial  Sale  of  such  Research  Program  Product  in  such  country  (as  applicable  to  the  particular
Licensed Existing Program Product or Research Program Product, the “Royalty Term”).

(c)    No Valid Claim.

(i)    If, during the Royalty Term for a Licensed Existing Program Product in a country, the composition of
matter or method of use of such Licensed Existing Program Product (or Licensed Existing Program Compound contained therein)
in such country is not covered by a Valid Claim of a Licensed Patent, then the applicable royalty rates set forth in Section 6.6(a)
with  respect  to  Net  Sales  of  such  Licensed  Existing  Program  Product  and  such  country  shall  be  reduced  by  [***]  during  the
period of the Royalty Term in which no Valid Claim of a Licensed Patent exists.

(ii)    If, during the Royalty Term for a Research Program Product in a country, the composition of matter
or method of use of such Research Program Product (or Research Program Compound contained therein) in such country is not
covered by a Valid Claim of a Research Program Patent, then the applicable royalty rates set forth in Section 6.6(a) with respect
to Net Sales of such Research Program Product and such country shall be reduced by [***] during the period of the Royalty Term
in which no Valid Claim of a Research Program Patent exists.

(d)        Biosimilar  Competition.  If,  during  the  Royalty  Term  for  a  Licensed  Product  in  a  country,  one  or  more
Biosimilars  is  sold  in  such  country,  the  applicable  royalty  rates  set  forth  in  Section  6.6(a)  for  such  Licensed  Product  in  such
country shall be reduced in such country by [***] commencing at such time that the market penetration of the Biosimilars in such
country is equal to or greater than [***], as determined by dividing (i) [***] by (ii) [***].

(e)    Third Party Licenses. On a Licensed Product-by-Licensed Product and country-by-country basis, Horizon
shall have the right to deduct from the royalty payment that would otherwise have been due under Section 6.6(a) with respect to
Net Sales of such Licensed Product in such country an amount equal to [***] of any [***] paid by Horizon or its Affiliate or
Sublicensee to any Third Party (including any [***] under an Alpine Third party Agreement reimbursed by Horizon to Alpine) in
consideration for a license or other rights under any Information or Patents owned or controlled by a Third Party that is [***] to
Develop,

24

Manufacture,  or  Commercialize  such  Licensed  Product  in  such  country  (including  under  an  Alpine  Third  Party  Agreement
pursuant to Section 2.7(b)).

(f)    Royalty Floor. In no event shall the application of Section 6.6(c), Section 6.6(d) and Section 6.6(e) reduce
the royalty payable on Net Sales of a Licensed Product in a country in a Calendar Quarter during the Royalty Term to less than
[***] of the royalty that would be payable on Net Sales of such Licensed Product in such country determined in accordance with
Section 6.6(a) (as reduced by Section 6.6(c), as applicable) without application of any such reductions; provided however that
any amounts paid to Third Parties as described in Section 6.6(e) that could not be applied due to application of the royalty floor
set forth in this Section 6.6(f) may be carried forward and applied against payments of royalties under Section 6.6(a) owing in
respect of such Licensed Product and such country on a Calendar Quarter basis, subject however to the application of the royalty
floor in each subsequent Calendar Quarter.

(g)    Royalty Reports and Payments.  Within [***] following  the  end  of  each  Calendar  Quarter,  commencing
with  the  Calendar  Quarter  in  which  the  First  Commercial  Sale  of  any  Licensed  Product  is  made  anywhere  in  the  Territory,
Horizon shall provide Alpine with a report containing the following information for the applicable Calendar Quarter: (i) [***],
(ii) [***] (iii) [***] (iv) [***]. Concurrent with the delivery of the applicable quarterly report, Horizon shall pay in Dollars all
amounts due to Alpine pursuant to Section 6.6 in such Calendar Quarter.

6.7    Payments Under Third Party License Agreements. As between the Parties, Alpine shall be solely responsible for
any  royalties  and  other  payments  to  Third  Parties  under  any  license  or  other  agreement  existing  as  of  the  Effective  Date  or
entered  into  during  the  Term  (subject  to  Section  2.7(b)  with  regard  to  any  Alpine  Third  Party  Agreement)  by  Alpine  or  its
Affiliate pursuant to which Alpine gains Control of any Licensed Technology.

6.8    Currency of Payments. Unless otherwise set forth in this Agreement or agreed to by the Parties, all payments under
this Agreement shall be made in Dollars by wire transfer of immediately available funds into an account designated by Alpine.
Net Sales outside of the U.S. shall be first determined in the currency in which they are earned and shall then be converted into an
amount in Dollars using Horizon’s customary and usual conversion procedures used in preparing its financial statements pursuant
to GAAP for the applicable reporting period.

6.9     Late Payments.  If  Alpine  does  not  receive  payment  of  any  undisputed  sum  due  to  it  on  or  before  the  due  date,
Alpine  shall  provide  notice  to  Horizon  of  such  late  payment.  If  Horizon  does  not  make  any  payment  within  [***]  following
receipt of such notice, then any portions thereof due hereunder which are not paid on the date such payments are due under this
Agreement will bear interest at the lesser of (a) [***] or (b) [***], in each case calculated on the number of days such payment is
delinquent, [***].

6.10        Records;  Audits.  Horizon  and  its  Affiliates  will,  and  Horizon  will  cause  each  of  its  Sublicensees,  if  any,  to,
maintain complete and accurate records in sufficient detail to confirm the accuracy of the calculation of royalty payments and the
achievement  of  milestone  events,  for  a  period  of  [***]  after  the  Calendar  Year  in  which  such  sales  or  events  occurred.  Upon
reasonable  prior  notice,  such  records  of  Horizon  and  its  Affiliates  shall  be  made  available  during  regular  business  hours  for  a
period  of  [***]  from  the  end  of  the  Calendar  Year  to  which  they  pertain  for  examination,  and  not  more  often  than  once  each
Calendar  Year  (unless  there  is  a  just  cause  for  an  additional  examination  based  upon  results  of  the  earlier  audit  during  such
Calendar Year), by an independent certified public accountant selected by Alpine and reasonably

25

acceptable to Horizon, for the sole purpose of and only to the extent necessary for verifying the accuracy of the financial reports
furnished by Horizon pursuant to this Article 6. Such independent accountant shall disclose to Alpine only the amounts that such
independent accountant believes to be due and payable hereunder to Alpine, details concerning any discrepancy from the amount
paid and the amount due, and shall disclose no other information revealed in such audit. The records for any particular Calendar
Year  shall  only  be  subject  to  [***]  audit  hereunder.  Any  and  all  records  examined  by  such  independent  accountant  shall  be
deemed Horizon’s Confidential Information which may not be disclosed by such independent accountant to any Third Party, and
Horizon  may  require  such  independent  accountant  to  enter  into  an  appropriate  written  agreement  obligating  it  to  be  bound  by
obligations of confidentiality and restrictions on use of such Confidential Information that are no less protective than those set
forth in Article 10. If, as a result of any inspection of the books and records of Horizon, it is shown that payments under this
Agreement were less than the amount which should have been paid, then Horizon shall make all payments required to be made
from the original due date to eliminate any discrepancy revealed by such inspection within [***] of such finding. If, as a result of
any inspection of the books and records of Horizon, it is shown that payments under this Agreement were more than the amount
which should have been paid, then Alpine shall, at Horizon’s election, either make all payments required to be made to eliminate
any  discrepancy  revealed  by  such  inspection  within  [***]  of  such  finding  or  credit  such  amounts  to  Horizon  against  future
payments. Alpine shall pay for such audits, except that in the event that the audited amounts were underpaid by Horizon by more
than [***] of the undisputed amounts that should have been paid during the period in question as per the audit, Horizon shall pay
the costs of the audit.

6.11    Taxes.

income arising directly or indirectly from the efforts of the Parties under this Agreement.

(a)    Taxes on Income. Each Party shall be solely responsible for the payment of all taxes imposed on its share of

(b)    VAT on Payments. All payments due under this Agreement are exclusive of VAT. If any VAT is chargeable
in respect of amounts payable pursuant to this Agreement, VAT shall be charged at the applicable rate required by applicable Law
and the party making such payment shall pay the VAT amount on receipt of a VAT invoice in the appropriate form.

(c)    Withholding Tax; Cooperation. The Parties agree to cooperate with one another and use reasonable efforts
to  reduce  or  eliminate  tax  withholding  or  similar  obligations  in  respect  of  royalties,  milestone  payments,  and  other  payments
made by Horizon to Alpine under this Agreement. To the extent Horizon is required under the Code, or any other tax Laws to
deduct and withhold taxes on any payment to Alpine, Horizon shall pay the amounts of such taxes to the proper Governmental
Authority  in  a  timely  manner  and  promptly  transmit  to  Alpine  an  official  tax  certificate  or  other  reasonable  evidence  of  such
withholding. If any taxes are so deducted or withheld, such deducted or withheld amounts shall be treated for all purposes of this
Agreement  as  having  been  paid  to  Alpine.  Upon  Horizon’s  reasonable  request,  Alpine  shall  provide  Horizon  any  tax  forms
(including a United States tax “residency certificate”, Internal Revenue Service Form W-8BEN or W-8ECI or other applicable
Internal Revenue Service Form) that may be reasonably necessary in order for Horizon to determine whether to withhold tax on
any such payments or to withhold tax on such payments at a reduced rate under the Code or any other tax Laws, including any
applicable bilateral income tax treaty. Horizon shall give reasonable support so that any withholding tax or value added tax may
be minimized or avoided to the extent permitted under the applicable Laws and treaties. Each Party shall provide the other with
reasonable assistance to enable the recovery, as permitted by applicable Laws, of

26

withholding taxes, value added taxes, or similar obligations resulting from payments made under this Agreement, such recovery
to be for the benefit of the Party bearing such withholding tax or value added tax. Horizon shall require its Sublicensees in the
Territory to cooperate with Alpine in a manner consistent with this Section 6.11(c). Notwithstanding the foregoing, (i) if Horizon
assigns or transfers this Agreement or its rights and obligations thereunder or changes its jurisdiction of tax residency, and such
transfer, assignment or change increases the amount of taxes required to be deducted or withheld from or paid with respect to the
payments  to  Alpine  contemplated  by  this  Agreement,  Horizon  and  its  assignee  or  transferee  shall  pay  Alpine  an  additional
amount  such  that  Alpine  shall  receive,  on  an  after-tax  basis,  the  same  amount  it  would  have  received  had  no  such  transfer  or
assignment been made; or (ii) if Alpine assigns or transfers this Agreement or its rights and obligations thereunder or changes its
jurisdiction of tax residency, and such transfer, assignment or change increases the amount of taxes required to be deducted or
withheld  from  or  paid  with  respect  to  the  payments  to  Alpine  contemplated  by  this  Agreement,  then  any  amount  payable  to
Alpine or its assignee or transferee under this Agreement shall be limited to the amount that would have been payable to Alpine
had no such assignment, transfer or change occurred. On or prior to the Effective Date, Alpine shall deliver to Horizon a valid
exemption certificate issued by the German Federal Tax Office.

7.1    Ownership.

ARTICLE 7
INTELLECTUAL PROPERTY

(a)    Background Rights. Each Party shall retain all right, title and interest in and to any Information or Patents
Controlled by such Party or its Affiliate as of the Effective Date, or which becomes Controlled by such Party or its Affiliate after
the  Effective  Date  and  independently  of  this  Agreement,  subject  to  any  licenses  granted  herein  with  respect  to  any  such
intellectual property that is Licensed Technology.

(b)    Existing Program IP.

(i)        Inventorship.  The  determination  of  inventorship  of  inventions,  Information  or  Patents  conceived,
reduced  to  practice,  discovered,  developed  or  otherwise  made  solely  or  jointly  by  or  on  behalf  of  such  Party  or  its  Affiliates
during  the  course  of,  arising  out  of  or  as  a  result  of  activities  performed  pursuant  to  the  Existing  Program  or  with  respect  to
Licensed Existing Program Compounds or Licensed Existing Program Products as contemplated by this Agreement, whether or
not  patented  or  patentable  (“Existing  Program  IP”),  and  whether  Existing  Program  IP  is  conceived,  reduced  to  practice,
discovered, developed or otherwise made solely by a Party or jointly with the other 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  the  United  States  patent  law  and  other  applicable  Law  in  the  United  States  irrespective  of  where  such
conception, reduction to practice, discovery, development or making occurs.

(ii)    Sole Program IP. As between the Parties, each Party shall solely own and retain all right, title, and
interest in and to any and all Existing Program IP that is conceived, reduced to practice, discovered, developed or otherwise made
solely by or on behalf of such Party or its Affiliate (“Sole Program IP”), including all Patents claiming such Sole Program IP
(“Sole  Program  Patents”).  [***]  Alpine’s  rights  in  any  Sole  Program  IP  and  Joint  Program  IP  (as  defined  below)  would  be
included in the Licensed Technology and subject to the licenses granted to Horizon under this Agreement.

27

(iii)    Joint Program IP. As between the Parties, all right, title, and interest in and to any and all Existing
Program IP that is conceived, reduced to practice, discovered, developed or otherwise made jointly by or on behalf of Horizon or
its Affiliates on the one hand, and Alpine or its Affiliates on the other hand (“Joint Program IP”), including all Patents claiming
such  Joint  Program  IP  (“Joint  Program  Patents”),  shall  be  owned  jointly  by  the  Parties,  with  each  Party  owning  an  equal,
undivided interest in and to such Joint Program IP. Subject to the license grants set forth in Sections 2.1 and 2.2 and to Alpine’s
obligations under Section 2.8, each Party shall have the right to exploit the Joint Program IP without a duty of seeking consent
from or accounting to the other Party.

(iv)    Assignment.  Each  Party  shall  cause  any  Person  that  performs  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 Existing Program IP 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).

(c)    Research Program IP.

(i)        Inventorship.  The  determination  of  inventorship  of  inventions,  Information  or  Patents  conceived,
reduced  to  practice,  discovered,  developed  or  otherwise  made  solely  or  jointly  by  or  on  behalf  of  the  Parties  or  its  Affiliates
during  the  course  of,  arising  out  of  or  as  a  result  of  activities  performed  pursuant  to  the  Research  Program  or  with  respect  to
Research  Program  Compounds  or  Research  Program  Products  as  contemplated  by  this  Agreement,  whether  or  not  patented  or
patentable  (“Research  Program  IP”),  and  whether  Research  Program  IP  is  conceived,  reduced  to  practice,  discovered,
developed  or  otherwise  made  solely  by  a  Party  or  jointly  with  the  other  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  the  United  States  patent  law  and  other  applicable  Law  in  the  United  States  irrespective  of  where  such
conception, reduction to practice, discovery, development or making occurs. [***].

(ii)    Ownership. [***].

(iii)    [***].

(iv)    [***].

(v)    [***].

7.2    Patent Prosecution.

(a)    Licensed Patents and Horizon Sole Program Patents.

(i)    Horizon Controlled Patents. As between the Parties, subject to this Section 7.2(a), [***].

(ii)    Cooperation. [***].

28

(iii)    Back-Up Rights. If Horizon intends to allow any such Horizon Controlled Patent to lapse or become
abandoned  in  any  jurisdiction  in  the  Territory,  Horizon  shall  notify  Alpine  at  least  [***]  in  advance  of  such  lapse  or
abandonment, [***] Upon such assumption, Alpine shall control the Prosecution and Maintenance of such Horizon Controlled
Patent pursuant to the terms and conditions set forth in Section 7.2(a)(i) above, mutatis mutandis, using counsel of its choice at its
cost and expense.

(iv)    Alpine Controlled Patents. As between the Parties, subject to this Section 7.2(a)(iv), [***].

(v)    [***].

(vi)        Joint  Patent  Committee.  The  Parties  shall  form  a  committee  comprised  of  one  (1)  or  two  (2)
representatives of each Party (as determined by mutual written agreement of the Parties), which committee shall meet [***] or at
other  regular  intervals  as  determined  by  such  committee,  to  discuss  strategy  [***]  The  committee  will  use  [***]  to  make  all
decisions  by  consensus.  Actions  to  be  taken  by  the  committee  shall  be  taken  only  following  unanimous  vote,  with  Alpine’s
representatives collectively having one (1) vote and Horizon’s representatives collectively having one (1) vote. If the committee
fails to reach agreement on a matter before it, either Party may submit such matter for resolution to the Parties’ executive officers
in accordance with the provisions of Section 12.1(c). If the executive officers fail to reach agreement on a matter before them,
then [***].

(vii)    Other Horizon Patents. [***].

(viii)    Cooperation. Each Party shall provide the other Party all reasonable assistance and cooperation, at
the other Party’s request and expense, in the Prosecution and Maintenance of Patents as set forth in this Section 7.2, including
providing  any  necessary  powers  of  attorney  and  executing  any  other  required  documents  or  instruments  for  such  prosecution.
Each Party shall execute and deliver to the other assignments with respect to any Patents in a mutually agreeable form and will
take whatever actions reasonably necessary (including the appointment of the other Party as its attorney in fact solely to make
such assignment) to effect such assignment, in accordance with the ownership provisions provided above in Section 7.1(b). The
prosecuting Party under this Section 7.2 agrees to conduct such Prosecution and Maintenance activities toward the objective of
optimizing overall patent protection for Licensed Existing Program Compounds and Licensed Existing Program Products.

(b)    Research Program Patents. [***].

7.3    Patent Enforcement.

(a)    Licensed Patents and Horizon Sole Program Patents.

(i)        Notification.  If  either  Party  (i)  becomes  aware  of  any  alleged  or  threatened  infringement  of  any
Licensed  Patents,  Joint  Program  Patents  or  Sole  Program  Patents  by  a  Third  Party  in  the  Territory  based  on  the  development,
commercialization or exploitation of, or an application to register or market, a product containing a Licensed Existing Program
Compound  or  any  Licensed  Existing  Program  Product  in  the  Territory,  or  (ii)  receives  notice  alleging  that  a  Third  Party’s
manufacture, use, or sale of the product containing a Licensed Existing Program Compound or any Licensed Existing Program
Product does not infringe any Licensed Patent, Joint Program Patent, or Sole Program Patent, or that such Patent is invalid or
unenforceable (including submitting an application to the FDA that constitutes an act of

29

infringement under 35 U.S.C. § 271(e)(2) or comparable application under applicable Law) (each, a “Product Infringement”), it
shall promptly notify the other Party in writing to that effect and the Parties will consult with each other regarding any actions to
be  taken  with  respect  to  such  Product  Infringement.  Each  Party  shall  share  with  the  other  Party  all  Information  available  to  it
regarding such alleged Product Infringement.

(ii)    Enforcement Rights.

(1)    Horizon Controlled Patents.

a.    Horizon’s First Right to Enforce. As between the Parties, Horizon shall have the first
right, but not the obligation, to bring a suit or other action against any Person engaged in a Product Infringement of, or any other
action  or  proceeding  regarding  alleged  or  threatened  infringement  or  claim  of  invalidity  or  unenforceability  of,  any  Horizon
Controlled  Patent  to  defend  against  any  challenge  to  any  of  the  foregoing,  at  Horizon’s  cost  and  expense.  Horizon  shall  keep
Alpine regularly informed of the status and progress of such enforcement or defense efforts, shall reasonably consider Alpine’s
comments on any such efforts, including determination of litigation strategy and filing of material papers to the competent court.
Alpine  shall  provide  Horizon  reasonable  assistance  in  such  enforcement  or  defense  pursuant  to  this  Section  7.3(a)(ii)(1)a,  at
Horizon’s request and expense, including joining such action as a party plaintiff if required by applicable Laws to pursue such
action. In addition, [***] Alpine shall be entitled to separate representation in such matter by counsel of its own choice and at its
own expense.

b.    Alpine’s Step-In Right to Enforce. If (A) Horizon elects not to commence a suit to
enforce any Horizon Controlled Patent that Horizon has the first right to enforce against any Person pursuant to Section 7.3(a)(ii)
(1)a,  or  settle  or  otherwise  secure  the  abatement  of  such  infringement  or  not  to  defend  against  any  challenge  to  any  of  the
Horizon Controlled Patent, or (B) Horizon fails to commence such suit within [***] (or such shorter period necessary to initiate
and  maintain  such  action)  of  a  request  by  Alpine  to  do  so,  then,  [***]  Alpine  shall  have  the  right,  but  not  the  obligation,  to
commence a suit or take action to enforce such Horizon Controlled Patent against such infringement in the Territory or to defend
against  such  challenge,  at  Alpine’s  cost  and  expense.  In  such  event  and  to  the  extent  time  permits,  promptly  after  Horizon’s
notice to Alpine that it does not elect to enforce such Horizon Controlled Patent or to defend against such challenge, the Parties
shall meet to discuss in good faith the strategy for enforcing such Horizon Controlled Patent or defending against such challenge.
Alpine shall keep Horizon regularly informed of the status and progress of such enforcement or defense efforts, shall reasonably
consider Horizon’s comments on any such efforts, including determination of litigation strategy and filing of material papers to
the competent court. [***] Horizon shall be entitled to separate representation in such matter by counsel of its own choice and at
its own expense.

(2)    Alpine’s Sole Right to Enforce Alpine Controlled Patents. As between the Parties, Alpine
shall  have  the  sole  right,  but  not  the  obligation,  to  bring  a  suit  or  other  action  against  any  Person  engaged  in  any  action  or
proceeding regarding alleged or threatened infringement or claim of invalidity or unenforceability of Alpine Controlled Patents or
to  defend  against  any  challenge  to  any  of  the  foregoing,  at  Alpine’s  cost  and  expense.  Alpine  shall  keep  Horizon  regularly
informed of the status and progress of such enforcement or defense efforts, [***].

(b)    Research Program Patents. As between the Parties, [***].

30

(c)        Biosimilar  Applications.  If  either  Party  receives  a  copy  of  an  application  submitted  to  the  FDA  under
subsection  (k)  of  Section  351  of  the  PHSA  or  any  subsequent  or  superseding  Law,  statute  or  regulation  naming  a  Licensed
Product as a reference product (a “Biosimilar Application”) 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), either Party shall, within [***] of receipt of
such Biosimilar Application or becoming aware that such Biosimilar Application has been filed, 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 to the extent Section 351(l)(1)(B)(iii) of the PHSA applies to such other
Party.  If  either  Party  receives  any  equivalent  Biosimilar  Application  or  otherwise  becomes  aware  that  such  an  equivalent
Biosimilar Application has been filed in any other jurisdiction in the Territory, either Party shall, within [***] of receipt of such
Biosimilar Application or becoming aware that such Biosimilar Application has been filed, notify the other Party. [***].

(d)    Cooperation. If a Party brings any suit, action or proceeding under this Section 7.3, the non-enforcing Party
shall agree to be joined as party plaintiff if required for the enforcing Party to bring any such suit, action or proceeding, at the
cost  and  expense  of  the  enforcing  Party.  The  non-enforcing  Party  will  provide  reasonable  assistance  to  the  enforcing  Party,
including  by  providing  access  to  relevant  documents  and  other  evidence  and  making  its  employees  available,  subject  to  the
enforcing Party’s reimbursement of any costs and expenses incurred by the non-enforcing Party in providing such assistance.

(e)    Expenses and Recoveries. The enforcing Party bringing a claim, suit or action under this Section 7.3 shall
be  solely  responsible  for  any  expenses  incurred  by  such  Party  as  a  result  of  such  claim,  suit  or  action.  If  such  Party  recovers
monetary  damages  in  such  claim,  suit  or  action,  such  recovery  shall  first  be  allocated  to  the  reimbursement  of  any  expenses,
including  attorneys’  fees,  incurred  by  the  Parties  in  such  litigation  (including,  for  this  purpose,  a  reasonable  allocation  of
expenses  of  internal  counsel).  If  such  recovery  is  insufficient  to  cover  all  such  costs  and  expenses  of  both  Parties,  it  shall  be
shared  in  proportion  to  the  total  of  such  costs  and  expenses  incurred  by  each  Party.  If  after  such  reimbursement  any  amounts
remain from such damages or other sums recovered, such remaining amounts shall be [***]; provided that, [***].

(f)        Settlement.  The  enforcing  Party  shall  not  enter  into  any  settlement  or  compromise  of  any  suit,  action  or
proceeding  pursuant  to  Section  7.3  (other  than  pursuant  to  Section  7.3(g)),  (i)  in  a  manner  that  would  diminish  the  rights  or
interests  of  the  non-enforcing  Party  or  admit  the  invalidity  or  unenforceability  of  any  Patent  Controlled  by  the  non-enforcing
Party  without  the  prior  written  consent  of  the  non-enforcing  Party,  such  consent  not  to  be  unreasonably  withheld;  or  (ii)  that
would impose any cost or liability on the non-enforcing Party, without the non-enforcing’s Party’s prior written consent, at the
non-enforcing Party’s sole discretion.

(g)        Other  Infringement  of  Patents.  For  any  and  all  infringement  of  any  Sole  Program  Patent  other  than  as
provided elsewhere in this Section 7.3, (i) Alpine shall have the sole right, but not the obligation, to bring an appropriate suit or
other action against any person or entity engaged in such other infringement of any such Sole Program Patent owned by Alpine
that is not a Horizon Controlled Patent or Alpine Controlled Patent, in its sole discretion, and shall bear all related expenses and
retain all related recoveries and (ii) Horizon shall have the sole right, but not the obligation, to bring an appropriate suit or other
action against any person or entity engaged in infringement of any Sole Program Patent owned by Horizon or any other Patents
owned or Controlled by Horizon that relate to any Licensed Compound or Licensed Product, in its sole discretion, and shall bear
all related expenses and retain all related recoveries,

31

and the other Party shall provide reasonable assistance and cooperation as set forth in Section 7.3(d), in such enforcement action,
including joining such action as a party plaintiff if required by applicable Laws to pursue such action, at the request and expense
of the Party bringing the suit or action.

7.4    Infringement of Third Party Rights. If any Licensed Compound or Licensed Product used or sold by Horizon, its
Affiliates  or  Sublicensees  becomes  the  subject  of  a  Third  Party’s  claim  or  assertion  of  infringement  of  a  Patent  within  the
Territory,  Horizon  shall  promptly  notify  Alpine  and  the  Parties  shall  agree  on  and  enter  into  a  “common  interest  agreement”
wherein the Parties agree to their shared, mutual interest in the outcome of such potential dispute, and thereafter, the Parties shall
promptly meet to consider the claim or assertion and the appropriate course of action. Horizon shall be solely responsible for the
defense of any such infringement claims (provided that Horizon shall provide to Alpine the ability to join such action, at Alpine’s
request  and  expense)  to  pursue  such  action  in  which  a  Patent  asserted  by  a  Third  Party  under  this  Section  7.4,  claims  (a)  the
composition of matter or use, sale, offer for sale, or importation in the Field of any Licensed Compound or Licensed Product or
(b)  the  manufacture  of  any  such  Licensed  Compound  or  Licensed  Product  using  the  process  employed  by  Alpine  as  of  the
Effective Date (any such patent, “Subject Patent”). To the extent related to the Subject Patent, [***].

7.5        Patent  Term  Extension.  In  the  event  Horizon  desires  to  seek  a  patent  term  extension  (including  any  pediatric
exclusivity  extensions  as  may  be  available)  or  supplemental  protection  certificate  or  their  equivalents  in  any  country  for  any
Licensed Patent or Joint Program Patent, then the Parties shall meet and discuss such request in good faith, provided that [***]

7.6    Regulatory Data Protection. To the extent required by or permitted by Law, Horizon will, at its sole discretion,
decide (with a primary goal of optimizing Regulatory Exclusivity for Licensed Compounds and Licensed Products) whether to
list with the applicable Regulatory Authorities during the Term any applicable Horizon Controlled Patent claiming any Licensed
Compound or Licensed Product that Horizon intends to, or has begun to, Commercialize, and that has become the subject of a
Regulatory Approval Application submitted to the FDA. Such listings may include all so called “Purple Book” listings required
under the Hatch-Waxman Act or listing of Patents as provided in the patent dispute resolution procedures of the Biologics Price
Competition and Innovation Act of 2009 or under Section 351(l) of the PHSA or similar provisions in the Territory during the
Term.

ARTICLE 8
REPRESENTATIONS AND WARRANTIES; COVENANTS; DISCLAIMERS

8.1    Mutual Representations and Warranties. Each Party hereby represents and warrants to the other Party as follows:

Laws of the jurisdiction in which it is incorporated; and

(a)    as of the Effective Date, it is a corporation duly organized, validly existing, and in good standing under the

(b)        as  of  the  Effective  Date,  (i)  it  has  the  corporate  power  and  authority  and  the  legal  right  to  enter  into  this
Agreement and perform its obligations hereunder; (ii) it has taken all necessary corporate action on its part required to authorize
the execution and delivery of this Agreement and the performance of its obligations hereunder; and (iii) this Agreement has been
duly executed and delivered on behalf of such Party, and constitutes a legal, valid, and binding obligation of such Party that is
enforceable against it in accordance with its terms.

32

8.2       Additional  Representations  and  Warranties  of  Alpine.  Alpine  represents  and  warrants  to  Horizon,  as  of  the

Effective Date, as follows:

(a)    Alpine has (i) the right under the Licensed Technology to grant the licenses to Horizon as purported to be
granted  pursuant  to  this  Agreement,  (ii)  sufficient  legal  or  beneficial  title  in  the  Licensed  Technology  to  grant  the  licenses  to
Horizon as purported to be granted pursuant to this Agreement, and (iii) [***];

(b)    there are no license or other agreements with any Third Party to which Alpine or any of its Affiliate is a party
regarding  the  [***]  of  (i)  any  Licensed  Know-How  or  (ii)  other  Information  Controlled  by  Alpine  or  its  Affiliates  as  of  the
Effective  Date,  in  each  case,  contemplated  to  be  provided  by  Alpine  to  Horizon  hereunder,  as  to  which  the  absence  of  rights
under  such  license  or  other  agreement  would  be  [***]  Horizon’s  ability  to  (x)  [***],  or  (y)  Develop,  Manufacture,
Commercialize,  make,  have  made,  use,  sell,  offer  for  sale,  import  and  otherwise  exploit  Licensed  Compounds  and  Licensed
Products in the Field in the Territory;

(c)    Alpine owns all right, title, and interest in the Patents listed on Exhibit H and such listed Patents represent all
Patents  owned  or  otherwise  Controlled  by  Alpine  that  relate  to  Licensed  Know-How  or  the  exploitation  thereof  under  this
Agreement, as such activities are contemplated as of the Effective Date;

(d)    to its Knowledge, neither Alpine nor any of its Affiliates owns or has any other rights (by license, sublicense
or otherwise) to any (i) [***], other than the Licensed Compounds, or (ii) under any Information, Patents or other intellectual
property rights that are [***] for the Development, Manufacturing, Commercialization, use, sale, offer for sale, importation or
other  exploitation  of  any  Licensed  Existing  Program  Compound  (including  as  incorporated  into  a  Licensed  Existing  Program
Product) in the Field, other than the Licensed Technology;

(e)    [***];

(f)    [***];

(g)    [***];

(h)    [***];

(i)    [***];

(j)    [***];

(k)    [***];

(l)    [***];

(m)    [***];

(n)    [***];

(o)    [***];

(p)    to its Knowledge, Alpine has provided to Horizon [***]; and

33

(q)    [***].

8.3    Mutual Covenants.

(a)    No Debarment. In the course of the Development of Licensed Compounds and Licensed Products or the
conduct of the Research Programs, each Party shall not knowingly use any employee or consultant who has ever been debarred or
is the subject of debarment or convicted of a crime for which an entity or person could be debarred (including by the FDA under
21 U.S.C. § 335a (or subject to a similar sanction of any other Governmental Authority)). Each Party shall notify the other Party
promptly  upon  becoming  aware  that  any  of  its  employees  or  consultants  has  been  debarred  or  is  the  subject  of  debarment
proceedings by any Regulatory Authority.

(b)    Compliance. Each Party and its Affiliates shall comply in all material respects with all applicable Laws in
the Development, Manufacture, and Commercialization of Licensed Compounds and Licensed Products and the conduct of the
Research Programs performed under this Agreement, including the statutes, regulations and written directives of the FDA, the
EMA and any Regulatory Authority having jurisdiction in the Territory, the FD&C Act, the Prescription Drug Marketing Act, the
Federal Health Care Programs Anti-Kickback Law, 42 U.S.C. §§ 1320a-7b(b), the statutes, regulations and written directives of
Medicare,  Medicaid  and  all  other  health  care  programs,  as  defined  in  42  U.S.C.  §§  1320a-7b(f),  and  the  Foreign  Corrupt
Practices Act of 1977, each as may be amended from time to time.

8.4    Additional Covenants.

(a)    Alpine represents and warrants to and covenants with Horizon during the Term that all of Alpine’s employees
and officers involved in research and development of the Licensed Technology, Research Program IP, Licensed Compounds, or
Licensed Products shall be obligated to assign to Alpine all inventions relating to such Licensed Technology, Research Program
IP, Licensed Compounds, or Licensed Products and to maintain as confidential the Confidential Information of Alpine;

(b)        Horizon  represents  and  warrants  to  and  covenants  with  Alpine  that  during  the  Term  all  of  Horizon’s
employees  and  officers  involved  in  Development  of  the  Licensed  Compounds  or  the  Licensed  Products  shall  be  obligated  to
assign to Horizon all inventions relating to such Licensed Compounds or the Licensed Products and to maintain as confidential
the Confidential Information of Horizon; and

(c)    Alpine represents and warrants to and covenants with Horizon that during the Term Alpine shall not (i) sell,
assign or otherwise transfer the Licensed Technology to any Third Party, except to the extent permitted by, and in compliance
with, a transaction permitted by Section 12.6, or (ii) grant to any Third Party any right or license under the Licensed Technology
that conflicts with the rights and licenses granted to Horizon hereunder.

8.5        Disclaimer.  EXCEPT  AS  EXPRESSLY  STATED  IN  THIS  AGREEMENT,  NO  REPRESENTATIONS  OR
WARRANTIES  WHATSOEVER,  WHETHER  EXPRESS  OR 
INCLUDING  WARRANTIES  OF
MERCHANTABILITY,  FITNESS  FOR  A  PARTICULAR  PURPOSE,  NON-INFRINGEMENT,  OR  NON-
MISAPPROPRIATION  OF  THIRD  PARTY  INTELLECTUAL  PROPERTY  RIGHTS,  ARE  MADE  OR  GIVEN  BY  OR  ON
BEHALF OF A PARTY, AND ALL REPRESENTATIONS AND WARRANTIES, WHETHER ARISING BY OPERATION OF
LAW  OR  OTHERWISE,  ARE  HEREBY  EXPRESSLY  EXCLUDED.  Without  limiting  the  generality  of  the  foregoing,  (a)
neither Party

IMPLIED, 

34

represents or warrants as to the success of any study or test conducted by such Party pursuant to this Agreement or the safety or
usefulness for any purpose of the technology, right or materials it provides hereunder, or that either Party will be successful in
obtaining any patent rights, or that any patents will issue based on a pending application; and (b) each Party specifically disclaims
any guarantee that the Licensed Compounds or Licensed Products will be successful, in whole or in part.

ARTICLE 9
INDEMNIFICATION

9.1    Indemnification by Alpine. Alpine shall defend, indemnify, and hold Horizon and its Affiliates and their respective
officers,  directors,  employees,  and  agents  (the  “Horizon  Indemnitees”)  harmless  from  and  against  any  and  all  Third  Party
claims, suits, proceedings, damages, expenses (including court costs and reasonable attorneys’ fees and expenses) and recoveries
(collectively, “Claims”)  to  the  extent  that  such  Claims  arise  out  of,  are  based  on,  or  result  from  (a)  the  performance  by  or  on
behalf of Alpine or its Affiliates of any obligations of Alpine with respect to Licensed Compounds or Licensed Products (only as
to the Licensed Compound contained therein) under this Agreement, including activities conducted pursuant to the Deliverables
Plan,  (b)  the  breach  of  any  of  Alpine’s  obligations  under  this  Agreement,  including  Alpine’s  representations,  warranties,  and
covenants  set  forth  herein,  (c)  the  willful  misconduct  or  negligence  of  Alpine  or  its  Affiliates  in  performing  under  this
Agreement,  or  (d)  if  applicable,  the  Development,  Manufacture  or  Commercialization  of  any  Terminated  Products  by  or  on
behalf of Alpine or its Affiliates or (sub)licensees. The foregoing indemnity obligation shall not apply to the extent that (i) the
Horizon  Indemnitees  fail  to  comply  with  the  indemnification  procedures  set  forth  in  Section  9.3  and  Alpine’s  defense  of  the
relevant  Claims  is  actually  prejudiced  by  such  failure,  or  (ii)  any  Claim  arises  from,  is  based  on,  or  results  from  any  act  or
omission for which Horizon is obligated to indemnify the Alpine Indemnitees under Section 9.2.

9.2        Indemnification  by  Horizon.  Horizon  shall  defend,  indemnify,  and  hold  Alpine  and  its  Affiliates  and  their
respective officers, directors, employees, and agents (the “Alpine Indemnitees”) harmless from and against any and all Claims to
the extent that such Claims arise out of, are based on, or result from (a) the Development, Manufacture or Commercialization of
Licensed Compounds or Licensed Products by or on behalf of Horizon or its Affiliates or Sublicensees, (b) the breach of any of
Horizon’s obligations under this Agreement, including Horizon’s representations, warranties, and covenants set forth herein, or
(c)  the  willful  misconduct  or  negligence  of  Horizon  or  its  Affiliates  in  performing  under  this  Agreement.  The  foregoing
indemnity  obligation  shall  not  apply  to  the  extent  that  (i)  the  Alpine  Indemnitees  fail  to  comply  with  the  indemnification
procedures set forth in Section 9.3 and Horizon’s defense of the relevant Claims is actually prejudiced by such failure, or (ii) any
Claim  arises  from,  is  based  on,  or  results  from  any  act  or  omission  for  which  Alpine  is  obligated  to  indemnify  the  Horizon
Indemnitees under Section 9.1.

9.3    Indemnification Procedures. The Party claiming indemnity under this Article 9 (the “Indemnified Party”)  shall
give written notice to the Party from whom indemnity is being sought (the “Indemnifying Party”)  promptly  after  learning  of
such Claim. The Indemnified Party shall provide the Indemnifying Party with reasonable assistance, at the Indemnifying Party’s
expense,  in  connection  with  the  defense  of  the  Claim  for  which  indemnity  is  being  sought  and,  if  the  Indemnifying  Party  has
failed to assume defense of such Claim within the time period required by Law to respond to any such Claim and the Indemnified
Party has thereafter assumed and is conducting the defense of the Claim, the Indemnifying Party shall provide the Indemnified
Party with reasonable assistance, at the Indemnifying Party’s expense, in connection with the

35

defense  of  the  Claim  for  which  the  indemnity  is  being  sought.  The  Indemnified  Party  may  participate  in  and  monitor  such
defense with counsel of its own choosing at its sole expense; provided, however, the Indemnifying Party shall have the right to
assume  and  conduct  the  defense  of  the  Claim  with  counsel  of  its  choice.  The  Indemnifying  Party  shall  not  settle  any  Claim
without the prior written consent of the Indemnified Party, not to be unreasonably withheld, conditioned or delayed. For clarity,
the Indemnified Party may freely withhold its consent to a settlement of a claim with respect to Claims if (a) such settlement does
not  include  a  complete  release  from  liability  of  the  Indemnified  Party  or  if  such  settlement  would  involve  undertaking  an
obligation  (including  the  payment  of  money  by  an  Indemnified  Party),  (b)  would  bind  or  impair  the  Indemnified  Party  or  (c)
includes  any  admission  of  wrongdoing  or  that  any  intellectual  property  or  proprietary  right  of  the  Indemnified  Party  or  this
Agreement is invalid, narrowed in scope or unenforceable. So long as the Indemnifying Party is actively defending the Claim in
good  faith,  the  Indemnified  Party  shall  not  settle  or  compromise  any  such  Claim  without  the  prior  written  consent  of  the
Indemnifying Party. If the Indemnifying Party does not assume and conduct the defense of the Claim as provided above, (i) the
Indemnified Party may defend against, consent to the entry of any judgment, or enter into any settlement with respect to such
Claim in any manner the Indemnified Party may deem reasonably appropriate (and the Indemnified Party need not consult with,
or  obtain  any  consent  from,  the  Indemnifying  Party  in  connection  therewith),  and  (ii)  the  Indemnifying  Party  shall  remain
responsible to indemnify the Indemnified Party as provided in this Article 9.

9.4        Limitation  of  Liability.  EXCEPT  WITH  RESPECT  TO  ANY  DAMAGES  AVAILABLE  FOR  A  PARTY’S
BREACH  OF  CONFIDENTIALITY  OBLIGATIONS  IN  ARTICLE  10  OR  ITS  OBLIGATIONS  IN  SECTION  2.8,  AND
WITHOUT  LIMITING  OR  RESTRICTING  THE  INDEMNIFICATION  RIGHTS  OR  OBLIGATIONS  OF  ANY  PARTY
UNDER  SECTION  9.1  OR  9.2,  NEITHER  PARTY  SHALL  BE  LIABLE  TO  THE  OTHER  FOR  ANY  SPECIAL,
CONSEQUENTIAL,  INCIDENTAL,  PUNITIVE,  OR  INDIRECT  DAMAGES  ARISING  FROM  OR  RELATING  TO  ANY
BREACH OF THIS AGREEMENT, REGARDLESS OF ANY NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

9.5    Insurance. Each Party shall procure and maintain insurance adequate to cover its obligations hereunder during the
Term and consistent with normal business practices of companies similarly situated. It is understood that such insurance shall not
be construed to create a limit of either Party’s liability with respect to its indemnification obligations under this Article 9. Each
Party shall provide the other Party with written evidence of such insurance upon request.

ARTICLE 10
CONFIDENTIALITY

10.1        Confidentiality.  Each  Party  agrees  that,  during  the  Term  and  for  a  period  of  [***]  thereafter,  it  shall  keep
confidential  and  shall  not  publish  or  otherwise  disclose  and  shall  not  use  for  any  purpose  other  than  as  provided  for  in  this
Agreement  (which  includes  the  exercise  of  any  rights  or  the  performance  of  any  obligations  hereunder)  any  Confidential
Information  furnished  to  it  by  the  other  Party  pursuant  to  this  Agreement,  except  to  the  extent  expressly  authorized  by  this
Agreement  or  otherwise  agreed  in  writing  by  the  Parties.  Each  Party  will  use  at  least  the  same  standard  of  care  as  it  uses  to
protect proprietary or confidential information of its own (but no less than reasonable care) to ensure that its employees, agents,
consultants, contractors, Sublicensees and other representatives do not disclose or make any unauthorized use of the Confidential
Information of the other Party. Each Party will promptly notify the other upon discovery of any unauthorized use or disclosure of
the  Confidential  Information  of  the  other  Party.  The  foregoing  confidentiality  and  non-use  obligations  shall  not  apply  to  any
portion of the

36

other Party’s Confidential Information that the receiving Party can demonstrate by competent written proof:

(a)        was  already  known  to  the  receiving  Party  or  any  of  its  Affiliates,  other  than  by  previous  confidential
disclosure by or on behalf of the disclosing Party or any of its Affiliates, at the time of disclosure by the other Party (provided
that this exception shall not apply to Alpine with respect to any Research Program IP);

receiving Party;

(b)    was generally available to the public or otherwise part of the public domain at the time of its disclosure to the

(c)        becomes  generally  available  to  the  public  or  otherwise  part  of  the  public  domain  after  its  disclosure  as

contemplated by this Agreement and other than through any act or omission of the receiving Party in breach of this Agreement;

to the actual or constructive knowledge of the receiving Party, had no obligation of confidentiality to the other Party; or

(d)    was disclosed to the receiving Party or any of its Affiliates on a non-confidential basis by a Third Party who,

(e)    was independently discovered or developed by the employees, subcontractors, consultants or agents of the
receiving Party or any of its Affiliates without use of or reference to the other Party’s Confidential Information, as evidenced by a
contemporaneous writing.

10.2    Authorized Disclosure. Notwithstanding the obligations set forth in Section 10.1, a Party may disclose the other

Party’s Confidential Information and the terms of this Agreement to the extent:

(a)    such disclosure is reasonably necessary (i) to comply with the requirements of Regulatory Authorities with
respect to obtaining and maintaining Regulatory Approval of a Licensed Product; or (ii) for prosecuting or defending litigation as
contemplated by this Agreement;

(b)        such  disclosure  is  reasonably  necessary  to  its  employees,  agents,  consultants,  contractors,  licensees  or
Sublicensees  on  a  need-to-know  basis  for  the  sole  purpose  of  performing  its  obligations  or  exercising  its  rights  under  this
Agreement; provided that in each case, the disclosees are bound by written obligations of confidentiality and non-use at least as
restrictive as those contained in this Agreement;

(c)    such disclosure is reasonably necessary to any bona fide potential or actual investor, acquirer, merger partner,
licensee,  sublicensee,  or  other  financial  or  commercial  partner  for  the  sole  purpose  of  evaluating  an  actual  or  potential
investment, acquisition or other business relationship; provided that, in connection with such disclosure, such Party shall inform
each disclosee of the confidential nature of such Confidential Information, and the disclosees are bound by written obligations of
confidentiality and non-use consistent with those contained in this Agreement; or

(d)    such disclosure is reasonably necessary to comply with applicable Laws, including regulations promulgated
by  applicable  security  exchanges,  court  order,  administrative  subpoena  or  order  or  otherwise  necessary  for  submitting
information to the Internal Revenue Service or other Governmental Authority.

37

Notwithstanding the foregoing, in the event a Party is required to make a disclosure of the other Party’s Confidential Information
pursuant to Section 10.2(a) or 10.2(d), such Party shall promptly notify the other Party of such required disclosure and shall use
reasonable  efforts  to  obtain,  or  to  assist  the  other  Party  in  obtaining,  a  protective  order  preventing  or  limiting  the  required
disclosure.  Any  information  disclosed  pursuant  to  Section  10.2(a)  through  Section  10.2(d)  shall  still  be  deemed  Confidential
Information and subject to the restrictions set forth in this Agreement, including the foregoing provisions of Article 10.

10.3    Technical Publication. During the Term, [***]. A Party seeking to publish a publication containing Confidential
Information  of  the  other  Party  (including  any  joint  Confidential  Information)  shall  provide  the  other  Party  the  opportunity  to
review and comment on such proposed publication (or where a copy of such publication or presentation is not available at such
time,  a  draft  or  outline  of  such  publication  or  description  of  such  presentation)  that  relates  to  any  Licensed  Compound  or
Licensed Product at least [***] prior to its intended submission for publication. The other Party shall provide the Party seeking
publication with its comments in writing, if any, as promptly as practicable after receipt of such proposed publication. The Party
seeking  publication  shall  consider  in  good  faith  any  comments  thereto  provided  by  the  other  Party  and  shall  comply  with  the
other  Party’s  request  to  remove  any  and  all  of  such  other  Party’s  Confidential  Information  from  the  proposed  publication.  In
addition, the Party seeking publication shall delay the submission for a period up to [***] in the event that the other Party can
demonstrate  reasonable  need  for  such  delay,  including  the  preparation  and  filing  of  a  patent  application  (or,  in  the  case  that  a
Party  has  a  compelling  business  justification,  for  a  longer  period  reasonably  selected  by  that  Party).  Each  Party  agrees  to
acknowledge the contributions of the other Party and its employees in all publications as scientifically appropriate.

10.4    Publicity; Terms of Agreement.

disclosure authorized in this Article 10 and the special authorized disclosure provisions set forth in this Section 10.4.

(a)    The Parties agree that the terms of this Agreement are the Confidential Information of both Parties, subject to

(b)    Public announcement of the execution of this Agreement shall be made substantially in the form of the joint

press release attached hereto as Exhibit K, on or promptly after the Effective Date.

(c)    After release of such joint press release in Exhibit K, if either Party desires to make a public announcement
concerning  the  terms  of  this  Agreement,  such  Party  shall,  except  as  otherwise  provided  herein,  give  reasonable  prior  advance
notice of the proposed text of such announcement to the other Party for its prior review and approval (not to be unreasonably
withheld,  conditioned,  or  delayed).  A  Party  commenting  on  such  a  proposed  press  release  by  the  other  Party  shall  provide  its
comments, if any, within [***] after receiving the press release from the other Party. Notwithstanding the foregoing, a Party shall
have  the  right  to  make  a  public  announcement  or  press  release  of  the  achievement  of  significant  events  in  Development
(including  achievement  of  each  milestone  event  set  forth  in  Sections  6.4(a)  and  6.4(b)  and  Sections  6.5(a)  and  6.5(b))  or
Commercialization of any Licensed Product in the Territory, even if beyond what may be strictly required by applicable Law and
the  rules  of  recognized  stock  exchanges,  to  the  extent  consistent  with  such  Party’s  own  disclosure  practices,  subject  to  prior
notice of such public announcement or press release to the other Party. The principles to be observed in such disclosures shall be
accuracy,  compliance  with  applicable  Law  and  regulatory  guidance  documents,  reasonable  sensitivity  to  potential  negative
reactions  of  applicable  Regulatory  Authorities  and  the  need  to  keep  investors  and  others  informed  regarding  the  requesting
Party’s business, including as required by the rules of recognized stock exchanges.

38

Except  as  provided  in  this  subsection  (c)  or  permitted  under  Section  10.2,  no  press  release  shall  include  the  other  Party’s
Confidential Information without the prior written consent of such other Party. In relation to the other Party’s review of such an
announcement, such other Party may make specific, reasonable comments on such proposed press release within the prescribed
time  for  commentary.  Neither  Party  shall  be  required  to  seek  the  permission  of  the  other  Party  to  repeat  any  information
regarding the terms of this Agreement that has already been publicly disclosed by such Party, or by the other Party, in accordance
with this Section 10.4, provided such information remains accurate as of such time.

(d)    The Parties acknowledge that either or both Parties may be obligated to file a copy of this Agreement and
summaries  of  the  terms  hereof  with  the  U.S.  Securities  and  Exchange  Commission  or  other  Governmental  Authority  as
reasonably required to comply with applicable Laws or the rules of a nationally-recognized securities exchange. Each Party shall
be  entitled  to  make  such  filings,  provided  that  it  requests  confidential  treatment  of  the  commercial  terms,  sensitive  technical
terms and other terms of this Agreement that a Party reasonably deems sensitive or competitive to the extent such confidential
treatment is reasonably available to such Party; provided that the foregoing obligation to request confidential treatment shall not
apply  with  respect  to  any  disclosure  of  this  Agreement  by  either  Party  to  the  U.S.  Internal  Revenue  Service  or  similar
Governmental Authority outside the U.S. In the event of any such filing, each Party will provide the other Party with a copy of
this  Agreement  and  related  filings  marked  to  show  provisions  for  which  such  Party  intends  to  seek  confidential  treatment  and
shall reasonably consider and incorporate the other Party’s comments thereon to the extent consistent with the legal requirements
and the rules of any nationally recognized securities exchange, with respect to the filing Party, governing disclosure of material
agreements and material information to be publicly filed.

10.5    Equitable Relief. Each Party acknowledges that its breach of this Article 10 may cause irreparable harm to the
other  Party,  which  cannot  be  reasonably  or  adequately  compensated  in  damages  in  an  action  at  law.  By  reasons  thereof,  each
Party agrees that the other Party shall be entitled to seek, in addition to any other remedies it may have under this Agreement or
otherwise, to obtain preliminary and permanent injunctive and other equitable relief to prevent or curtail any actual or threatened
breach of the obligations relating to Confidential Information set forth in this Article 10 by the other Party.

10.6    Attorney-Client Privilege. Neither Party is waiving, nor will be deemed to have waived or diminished, any of its
attorney work product protections, attorney-client privileges or similar protections and privileges recognized under the applicable
law of any jurisdiction as a result of disclosing information pursuant to this Agreement, or any of its Confidential Information
(including Confidential Information related to pending or threatened litigation) to the receiving Party, regardless of whether the
disclosing Party has asserted, or is or may be entitled to assert, such privileges and protections. The Parties may become joint
defendants in proceedings to which the information covered by such protections and privileges relates and may determine that
they  share  a  common  legal  interest  in  disclosure  between  them  that  is  subject  to  such  privileges  and  protections,  and  in  such
event, may enter into a joint defense agreement setting forth, among other things, the foregoing principles, but are not obligated
to do so.

ARTICLE 11
TERM AND TERMINATION

11.1    Term. This Agreement shall become effective on the Effective Date and, unless earlier terminated pursuant to this
Article 11, shall remain in effect until expiration of the Royalty Term for all Licensed Products in the Territory (the “Term”).
[***].

39

11.2    Termination for Convenience. Horizon may terminate this Agreement (a) in its entirety or (b) [***] (a “Program
Termination”) at any time and for any reason or for no reason upon delivery of (A) at least [***] prior written notice to Alpine if
no  [***]  has  occurred  with  respect  to  a  Licensed  Product  and  (B)  at  least  [***]  prior  written  notice  to  Alpine  if  [***]  has
occurred with respect to a Licensed Product.

11.3    Termination for Breach. Each Party (the “Non-Breaching Party”) shall have the right, without prejudice to any
other remedies available to it at law or in equity, to terminate this Agreement in its entirety upon written notice to the other Party
if  the  other  Party  materially  breaches  its  obligations  under  this  Agreement  and,  after  receiving  written  notice  identifying  such
material  breach  in  reasonable  detail,  fails  to  cure  such  material  breach  within  [***]  after  receipt  of  such  notice  (the  “Cure
Period”), or if such material breach (excluding any failure to pay any undisputed amounts due hereunder) is not susceptible to
cure within the Cure Period, fails to deliver to the Non-Breaching Party within the Cure Period a written plan that is reasonably
calculated to resolve such material breach within a specified period (not to exceed [***]) and does not cure such material breach
within the period specified in such plan. [***].

11.4    Termination for Patent Challenge. In the event Horizon or any of its Affiliates or Sublicensees challenges under
any court action or proceeding, or before any patent office, the validity, patentability, enforceability, or non-infringement of any
Licensed Patent, or initiates a reexamination of any Licensed Patent, or assists any Third Party to conduct any of the foregoing
activities (each, a “Challenge”), Alpine will have the right to terminate this Agreement in accordance with the following terms.
In  the  event  the  Challenge  is  by  Horizon  or  its  Affiliate,  Alpine  may  terminate  this  Agreement  within  [***]  of  the  Challenge
unless Horizon withdraws such Challenge. [***].

11.5    Termination for Insolvency. Each Party shall have the right to terminate this Agreement upon delivery of written
notice to the other Party in the event that (a) such other Party files in any court or agency pursuant to any statute or regulation of
any jurisdiction a petition in bankruptcy or insolvency or for reorganization or similar arrangement for the benefit of creditors or
for the appointment of a receiver or trustee of such other Party or its assets, (b) such other Party is served with an involuntary
petition against it in any insolvency proceeding and such involuntary petition has not been stayed or dismissed within [***] of its
filing, or (c) such other Party makes an assignment of substantially all of its assets for the benefit of its creditors.

11.6        Consequences  of  Termination.  Upon  any  termination  of  this  Agreement,  except  as  otherwise  set  forth  in  this

Section 11.6 and Section 11.7, all licenses and rights granted by either Party under this Agreement shall terminate; [***].

(a)        Existing  Program  Termination.  In  the  event  that  this  Agreement  is  terminated  by  Horizon  pursuant  to
Section 11.2 or by Alpine pursuant to Section 11.3, 11.4 or 11.5 with respect to the Existing Program, Licensed Existing Program
Compounds  and  Licensed  Existing  Program  Products,  and  Alpine  provides  written  notice  to  Horizon  within  [***]  after  the
effective  date  of  such  termination,  that  Alpine  wishes  to  continue  development  or  commercialization  with  respect  to  any  such
Licensed Existing Program Products, (i) clause (b) below shall apply if such termination becomes effective [***] (ii) if clause (i)
does not apply, [***].

(b)        Rights  to  Licensed  Existing  Program  Product(s).  Only  in  the  event  described  in  Section  11.6(a),  the

following terms of this Section 11.6(b) shall apply.

(i)    Regulatory Materials. [***].

40

(ii)    Technology Licenses. [***].

(iii)    Trademarks. [***].

direct license from Alpine to the furthest extent possible.

(iv)        Sublicensees.  Subject  to  Section  2.4(a)(iv),  Horizon’s  Sublicensees  shall  continue  in  effect  as  a

smooth, orderly and prompt transition of the Terminated Product(s) to Alpine or its designee(s).

(v)    General Assistance. Horizon agrees to fully cooperate with Alpine and its designee(s) to facilitate a

(vi)    Costs and Expenses. [***].

(c)        Research  Program  Termination.  In  the  event  that  this  Agreement  is  terminated  with  respect  to  any
Research Program(s), Research Program Compounds and Research Program Products, this Section 11.6(c) shall apply. If  such
termination  was  by  Horizon  pursuant  to  Section  11.2  or  by  Alpine  pursuant  to  Section  11.3,  11.4  or  11.5  with  respect  to  such
Research  Program(s),  [***].  Except  to  the  extent  the  Parties  enter  into  such  separate  agreement  with  respect  to  any  Research
Program  Product(s),  if  a  Research  Program  Product  is  Developed  or  Commercialized  by  Horizon  or  any  of  its  Affiliates  or
Sublicensees, all of Horizon’s payment and other obligations [***] shall continue to apply, including after any termination of this
Agreement, except any termination [***].

11.7        Survival.  Termination  or  expiration  of  this  Agreement  shall  not  affect  any  liabilities  of  the  Parties  under  this
Agreement  that  have  accrued  prior  to  the  date  of  termination  or  expiration.  Notwithstanding  anything  to  the  contrary,  the
following provisions shall survive any expiration or termination of this Agreement: [***].

11.8        No  Limitation  on  Remedies.  Notwithstanding  anything  to  the  contrary  in  this  Agreement,  termination  or
expiration  of  this  Agreement  shall  not  relieve  the  Parties  of  any  liability  or  obligation  which  accrued  hereunder  prior  to  the
effective date of such termination or expiration nor prejudice either Party’s right to obtain performance of any obligation. Subject
to the terms and conditions of this Agreement, each Party shall be free to seek (without restriction as to the number of times it
may seek) damages, costs and remedies that may be available at Law or in equity and shall be entitled to offset the amount of any
damages  and  costs  obtained  in  a  final,  non-appealable  judgment  (or  judgment  from  which  no  appeal  was  taken  within  the
allowable  time  period)  of  monetary  damages  or  costs  (as  permitted  by  this  Agreement)  against  the  other  Party  against  any
amounts otherwise due to such other Party under this Agreement.

12.1    English Language; Governing Law; Jurisdiction; Disputes.

ARTICLE 12
MISCELLANEOUS

interpretation of, and any dispute regarding, the terms of this Agreement.

(a)    English Language. This Agreement was prepared in the English language, which language shall govern the

(b)    Governing Law. This Agreement and all disputes arising out of or related to this Agreement or any breach
hereof shall be governed by and construed under the laws of the State of New York, U.S., without giving effect to any choice of
law principles that would require

41

the  application  of  the  laws  of  a  different  jurisdiction  and  excluding  the  United  Nations  Conventions  on  Contracts  for  the
International Sale of Goods. For clarification and notwithstanding Section 12.1(d) below, any dispute relating to the inventorship,
scope, validity, enforceability or infringement of any patent right shall be governed by and construed and enforced in accordance
with the patent laws of the applicable jurisdiction.

(c)    Disputes. Unless otherwise set forth in this Agreement, in the event of any controversies or claims arising
out  of,  relating  to  or  in  connection  with  any  provision  of  this  Agreement  (“Dispute”),  such  Dispute  shall  be  referred  to  the
President  of  Alpine  (or  his  or  her  designee)  and  the  Chief  Strategy  Officer  of  Horizon  (or  his  or  her  designee)  for  good  faith
negotiations attempting to resolve the Dispute.

(d)    Arbitration. Should the designated executive officers of the Parties be unable to resolve such Dispute within
[***] after such Dispute has first been referred to them, then the Dispute shall be finally settled by binding arbitration by a panel
of [***] arbitrators pursuant to the then-current Commercial Arbitration Rules of the American Arbitration Associations (“AAA
Rules”),  except  where  they  conflict  with  this  Section  12.1(d)  shall  control.  Each  Party  shall  nominate  [***]  arbitrator  and  the
[***] Party-nominated arbitrators shall then nominate the [***] arbitrator, who shall serve as the presiding arbitrator, within [***]
after  the  second  arbitrator’s  appointment.  The  arbitrators  shall  not  be  [***]  and  each  arbitrator  shall  have  at  least  [***]  of
pharmaceutical industry experience. At the request of a Party, the arbitral tribunal shall have the discretion to order the disclosure
of specified documents by the Parties. Such a request shall identify the document(s) with a reasonable degree of specificity and
establish the relevance of the document(s) to the arbitration.

the arbitration shall be English.

(i)    Seat; Language. The seat, or legal place, of arbitration shall be New York City, NY. The language of

(ii)    Relief. Except as otherwise specifically limited in this Agreement, including Section 9.4, the arbitral
tribunal  shall  have  the  power  to  grant  any  remedy  or  relief  that  it  deems  appropriate,  whether  provisional  or  final,  including
injunctive  relief.  Each  Party  retains  the  right  to  apply  to  any  court  of  competent  jurisdiction  for  interim  and/or  conservatory
measures, including pre-arbitral attachments or preliminary injunctions, and any such request shall not be deemed incompatible
with, or a waiver of, this agreement to arbitrate. The arbitration award shall be final and binding on the Parties, and the Parties
undertake to carry out any award without delay. Judgment on the award may be entered in any court of competent jurisdiction.

(iii)        Costs.  Each  Party  shall  bear  its  own  legal  fees.  The  arbitrators  shall  assess  their  costs,  fees  and
expenses  against  the  Party  losing  the  arbitration  unless  they  believe  that  neither  Party  is  the  clear  winner,  in  which  case  the
arbitrators shall divide such fees, costs and expenses according to their discretion. The arbitrators, in the arbitrators’ discretion,
may award reimbursement of attorney’s fees to the prevailing Party.

(iv)        Confidentiality.  The  existence  and  content  of  the  arbitral  proceeding,  including  any  rulings  or
award,  shall  be  kept  confidential  by  the  Parties  and  the  arbitrator  except  to  the  extent  (A)  required  by  applicable  Law;  (B)
required to protect or pursue a legal right; (C) required to enforce or challenge an award; or (D) approved by written consent of
the Parties. Notwithstanding anything to the contrary herein, either Party may disclose matters relating to the arbitration or the
arbitral proceedings where necessary for the preparation or presentation of a claim or defense in such arbitration. The arbitrators
shall issue appropriate protective orders to safeguard each Party’s Confidential Information.

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(v)    Timing. The hearing shall commence within [***] after the selection of the arbitrators. The award
shall be rendered within [***] of the appointment of the arbitral tribunal, unless the Parties jointly request an extension or the
arbitral tribunal determines,  in  a  reasoned  decision,  that  the  interest  of  justice or the complexity of the case requires that such
limit be extended.

after termination of this Agreement for any reason.

(vi)    Survivability. Any duty to arbitrate under this Agreement shall remain in effect and be enforceable

(vii)        Patent  and  Trademark  and  Other  Disputes. Any  dispute,  controversy  or  claim  relating  to  the
scope, validity, enforceability or infringement of any Patents or trademarks shall be submitted to a court of competent jurisdiction
in the country in which such patent or trademark rights were granted or arose. Arbitration shall not be applicable to any matter to
be  decided  by  the  JRC  or  by  Horizon  pursuant  to  its  final  decision-making  authority  with  respect  to  matters  within  the
jurisdiction of the JRC.

12.2        Entire  Agreement;  Amendment.  This  Agreement,  including  the  Exhibits  hereto,  and  the  SPA  set  forth  the
complete, final and exclusive agreement and all the covenants, promises, agreements, warranties, representations, conditions and
understandings between the Parties with respect to the subject matter hereof and supersedes, as of the Effective Date, all prior and
contemporaneous  agreements  and  understandings  between  the  Parties  with  respect  to  the  subject  matter  hereof,  including  the
Confidentiality Agreement. No subsequent alteration, amendment, change or addition to this Agreement shall be binding upon
the Parties unless reduced to writing and signed by an authorized officer of each Party.

12.3    Force Majeure. Both Parties shall be excused from the performance of their obligations under this Agreement to
the extent that such performance is prevented by a Force Majeure and the nonperforming Party promptly provides notice of the
prevention to the other Party. Such excuse shall be continued so long as the condition constituting such Force Majeure continues
and the nonperforming Party takes reasonable efforts to remove the condition. For purposes of this Agreement, “Force Majeure”
means, with respect to a Party, conditions beyond the reasonable control of such Party, including an act of God, war, terrorist act,
labor  strike  or  lock-out,  epidemic,  fire,  earthquake,  storm,  release  of  radioactive  material  into  the  environment,  or  like
catastrophe. Notwithstanding the foregoing, a Party shall not be excused from making payments owed hereunder because of a
Force Majeure affecting such Party. If a Force Majeure persists for more than [***], then the Parties will discuss in good faith the
modification  of  the  Parties’  obligations  under  this  Agreement  in  order  to  mitigate  the  delays  caused  by  such  Force  Majeure.
Notwithstanding  anything  to  the  contrary  contained  in  this  Section  12.3,  the  Parties  acknowledge  and  agree  that  a  COVID-19
pandemic and business disruptions related thereto (collectively, the “COVID Event”) are currently occurring as of the Effective
Date and may worsen, and the Parties further acknowledge and agree that, as of the Effective Date, neither the COVID Event, nor
any recurrence thereof, shall constitute a Force Majeure.

12.4    Notices. Any notice required or permitted to be given under this Agreement shall be in writing, shall specifically
refer to this Agreement, and shall be addressed to the appropriate Party at the address specified below or such other address as
may be specified by such Party in writing in accordance with this Section 12.4, and shall be deemed to have been given for all
purposes (a) when received, if hand-delivered or sent by confirmed electronic delivery or a reputable courier service, or (b) [***]
after mailing, if mailed by first class certified or registered airmail, postage prepaid, return receipt requested.

43

If to Alpine:    Alpine Immune Sciences, Inc.

188 E Blaine St. Suite 200 
Seattle, WA 98102 
Attn: [***]

    Email: [***]
    With a copy to: [***]

With a copy to (which shall not constitute notice): 

    Wilson Sonsini Goodrich & Rosati

    Professional Corporation

    650 Page Mill Road
    Palo Alto, CA 94304-1050
    United States
    Attn: Ian B. Edvalson, Esq.
    Telephone: (650) 493-9300
    Email: [***]

If to Horizon:    Horizon Therapeutics Ireland DAC

70 St. Stephen’s Green
Dublin 2, D02 E2X4, Ireland
Attn: [***]
Telephone: +353 1 772 2100
Email: [***]

With a copy to (which shall not constitute notice):

Horizon Therapeutics USA, Inc.
1 Horizon Way
Deerfield, IL 60015-3888
Attn: [***]
Telephone: 224-383-3000

12.5        No  Strict  Construction;  Headings.  This  Agreement  has  been  prepared  jointly  by  the  Parties  and  shall  not  be
strictly construed against either Party. Ambiguities, if any, in this Agreement shall not be construed against any Party, irrespective
of  which  Party  may  be  deemed  to  have  authored  the  ambiguous  provision.  The  headings  of  each  Article  and  Section  in  this
Agreement have been inserted for convenience of reference only and are not intended to limit or expand on the meaning of the
language contained in the particular Article or Section. Except where the context otherwise requires, wherever used, the singular
shall include the plural and the plural the singular. The use of any gender shall be applicable to all genders. The word “or” is used
in  the  inclusive  sense  (and/or)  unless  the  context  dictates  otherwise  because  the  subjects  of  the  conjunction  are  mutually
exclusive.  The  term  “including”  means  “including  without  limitation,”  without  limiting  the  generality  of  any  description
preceding  such  term.  The  term  “shall”  means  “will”.  In  addition,  (a)  the  words  “hereof,”  “herein,”  “hereby”  and  derivative  or
similar words refer to this Agreement (including any Exhibits); (b) provisions that require that a Party or the Parties hereunder
“agree,”  “consent”  or  “approve”  or  the  like  shall  require  that  such  agreement,  consent  or  approval  be  specific  and  in  writing,
whether by written agreement, letter

44

    
or otherwise; and (c) neither Party or its Affiliates shall be deemed to be acting “on behalf of” or “under authority of” the other
Party.

12.6    Assignment. Neither Party may assign or transfer this Agreement or any rights or obligations hereunder without
the prior written consent of the other Party, except that a Party may make such an assignment or transfer without the other Party’s
consent  (i)  to  an  Affiliate  (for  so  long  as  such  entity  remains  an  Affiliate),  provided  that  such  assigning  Party  shall  remain
responsible for such Affiliate’s conduct or (ii) to a Third Party acquiror or its Affiliate in connection with a Change of Control of
such Party (such Third Party, an “Acquiror”). Any successor or assignee of rights or obligations permitted hereunder shall, in
writing to the other Party, expressly assume performance of such rights or obligations. Any permitted assignment shall be binding
on the successors of the assigning Party. Any assignment or attempted assignment by either Party in violation of the terms of this
Section 12.6 shall be null, void and of no legal effect.

12.7    Further Actions. Each Party agrees to execute, acknowledge and deliver such further instruments, and to do all
such other reasonable and customary acts, as may be necessary or appropriate in order to carry out the purposes and intent of this
Agreement.

12.8    Rights in Bankruptcy. All rights and licenses granted under or pursuant to this Agreement by Alpine are, and
shall  otherwise  be  deemed  to  be,  for  purposes  of  Section  365(n)  of  the  Bankruptcy  Code,  licenses  of  rights  to  “intellectual
property” as defined under Section 101 of the Bankruptcy Code. The Parties agree that Horizon, as licensee of such rights under
this Agreement, shall retain and may fully exercise all of its rights and elections under the Bankruptcy Code solely applicable to
the Licensed Compounds, [***] Licensed Technology, and Alpine Libraries, including without limitation Horizon’s right to retain
all licenses to Licensed Technology granted herein. Without limiting the generality of the foregoing, the Parties intend and agree
that  any  sale  of  Alpine’s  assets  under  Section  363  of  the  Bankruptcy  Code  shall  be  subject  to  Horizon’s  rights  under  Section
365(n) with respect to such Licensed Technology, that Horizon cannot be compelled to accept a money satisfaction of its interests
in Licensed Technology, and that any such sale therefore may not be made to a purchaser “free and clear” of Horizon’s license
rights  without  the  consent  of  Horizon.  The  Parties  further  agree  that,  in  the  event  of  the  commencement  of  a  bankruptcy
proceeding by or against Alpine under the Bankruptcy Code, Horizon shall be entitled to a complete duplicate of (or complete
access  to,  as  appropriate)  any  such  intellectual  property  solely  applicable  to  the  Licensed  Compounds,  [***]  Licensed
Technology, and Alpine Libraries and all embodiments of such intellectual property, and the same, if not already in its possession,
shall  be  promptly  delivered  to  them  (i)  upon  any  such  commencement  of  a  bankruptcy  proceeding  upon  its  written  request
therefor, unless Alpine elects to continue to perform all of its obligations under this Agreement, or (ii) if not delivered under (i)
above, following the rejection of this Agreement by or on behalf of Alpine upon written request therefor by Horizon. (The Parties
acknowledge  and  agree  that  “embodiments”  of  intellectual  property  within  the  meaning  of  Section  365(n)  include  without
limitation  laboratory  notebooks,  inventory,  research  studies,  data,  and  regulatory  approvals  to  the  extent  such  items  are  solely
applicable to the Licensed Compounds, [***], Licensed Technology and Alpine Libraries). Additionally, if (a) a case under the
Bankruptcy Code is commenced by or against Alpine, (b) this Agreement is rejected as provided in the Bankruptcy Code, and (c)
Horizon  elects  to  retain  its  rights  hereunder  as  provided  in  Section  365(n)  of  the  Bankruptcy  Code,  Alpine  (in  any  capacity,
including debtor-in-possession) and its successors and assigns (including a trustee) shall not interfere with Horizon’s rights under
this Agreement to Licensed Technology (including such embodiments), including any right to obtain such Licensed Technology
(or such embodiments) from another entity, to the extent provided in Section 365(n) of the Bankruptcy Code. All rights, powers
and remedies of Horizon provided herein are in addition to and not in

45

substitution  for  any  and  all  other  rights,  powers  and  remedies  now  or  hereafter  existing  at  law  or  in  equity  (including  the
Bankruptcy Code) in the event of the commencement of a case under the Bankruptcy Code with respect to Alpine. The Parties
agree  that  they  intend  the  following  rights  to  extend  to  the  maximum  extent  permitted  by  law,  and  to  be  enforceable  under
Section 365(n) of the Bankruptcy Code: (I) the right of access to any Licensed Technology (including all embodiments thereof)
of Alpine, which is necessary for the development, manufacture, supply, commercialization, sale, import or export of Licensed
Compounds or Licensed Products, in any case solely as provided under this Agreement; and (II) the right to contract directly with
any Third Party to complete the same.

12.9    Severability. If any one or more of the provisions of this Agreement is held to be invalid or unenforceable by any
court  of  competent  jurisdiction  from  which  no  appeal  can  be  or  is  taken,  the  provision  shall  be  considered  severed  from  this
Agreement and shall not serve to invalidate any remaining provisions hereof. The Parties shall make a good faith effort to replace
any  invalid  or  unenforceable  provision  with  a  valid  and  enforceable  one  such  that  the  objectives  contemplated  by  the  Parties
when entering this Agreement may be realized.

12.10    No Waiver. Any delay in enforcing a Party’s rights under this Agreement or any waiver as to a particular default
or other matter shall not constitute a waiver of such Party’s rights to the future enforcement of its rights under this Agreement,
except with respect to an express written and signed waiver (signed by the Party providing such waiver) relating to a particular
matter for a particular period of time.

12.11        Independent  Contractors.  Each  Party  shall  act  solely  as  an  independent  contractor,  and  nothing  in  this
Agreement shall be construed to give either Party the power or authority to act for, bind, or commit the other Party in any way.
Nothing herein shall be construed to create the relationship of partners, principal and agent, or joint-venture partners between the
Parties.  No  Party  shall  report  this  Agreement  (and  the  transactions  hereunder)  as  an  entity  or  partnership  for  any  tax  purpose
unless required pursuant to a “final determination” in accordance with Section 1313 of the Code.

12.12    No Third Party Beneficiaries. This Agreement is neither expressly nor impliedly made for the benefit of any
party  other  than  the  Parties  and  their  successors  and  permitted  assigns,  except  for  the  Horizon  Indemnitees  and  Alpine
Indemnitees expressly entitled to indemnification as provided in Article 9 and only in accordance with the terms of such Article
9.

12.13        Counterparts;  Electronic  Delivery.  This  Agreement  may  be  executed  in  counterparts,  by  original  or  PDF
signature,  each  of  which  shall  be  deemed  an  original,  but  all  of  which  together  shall  constitute  one  and  the  same  instrument.
Signatures  to  this  Agreement  transmitted  by  email  in  “portable  document  format”  (“.pdf”),  or  by  any  other  electronic  means
intended  to  preserve  the  original  graphic  and  pictorial  appearance  of  this  Agreement  shall  have  the  same  effect  as  physical
delivery of the paper document bearing original signature.

[Signature page follows]

46

In Witness Whereof, the Parties have executed this Agreement by their duly authorized officers as of the Effective Date.

Horizon Therapeutics Ireland DAC    

Alpine Immune Sciences, Inc.

By: /s/ William D. Gannon    

Name: William D. Gannon    

By: /s/ Paul Rickey    

Name: Paul Rickey    

Title: Director    

Title: Senior Vice President and Chief Financial Officer    

Exhibit A – Alpine Reserved Sequences

[***]

Exhibit B – Back Up Compound

[***]

49

.    

Exhibit C – Deliverables Plan

[***]

Exhibit D – Deliverables Budget

[***]

Exhibit E – Individuals with Knowledge

[***]

Exhibit F – Lead Compound

[***]

Exhibit G – Licensed Know-How

[***]

Exhibit H – Licensed Patents

[***]

Exhibit I – Research Plan

[***]

Exhibit J – List of Countries for Patent Applications

[***]

Exhibit K – Press Release

[See Attached]

Exhibit 10.31

This Stock Purchase Agreement (this “Agreement”)  is  dated  as  of  December  15,  2021,  by  and  between  Alpine  Immune  Sciences,

Inc., a Delaware corporation (the “Company”), and Horizon Therapeutics Ireland DAC, an Irish company (the “Purchaser”).

STOCK PURCHASE AGREEMENT

RECITALS

The Company and the Purchaser are each executing and delivering this Agreement in reliance upon the exemption from securities

registration afforded by Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”).

NOW, THEREFORE, IN CONSIDERATION of the mutual covenants contained in this Agreement, and for other good and valuable

consideration, the receipt and adequacy of which are hereby acknowledged, the Company and the Purchaser hereby agree as follows:

ARTICLE I.
DEFINITIONS

1.1    Definitions. In addition to the terms defined elsewhere in this Agreement, for all purposes of this Agreement, the following

terms shall have the meanings indicated in this Section 1.1:

“Acquiring Person” has the meaning set forth in Section 4.4.

“Affiliate”  means,  with  respect  to  any  Person,  any  other  Person  that,  directly  or  indirectly  through  one  or  more
intermediaries,  Controls,  is  controlled  by  or  is  under  common  control  with  such  Person,  as  such  terms  are  used  in  and  construed  under
Rule 405 under the Securities Act.

“Applicable Laws” has the meaning set forth in Section 3.1(qq).

“Agreement” has the meaning set forth in the Preamble.

“Authorizations” has the meaning set forth in Section 3.1(qq).

“Board of Directors” means the board of directors of the Company.

day on which banking institutions in the State of New York are authorized or required by law or other governmental action to close.

“Business Day” means any day except Saturday, Sunday, any day which is a federal legal holiday in the United States or any

“Closing” means the closing of the purchase and sale of the Shares pursuant to this Agreement.

“Closing Date” means a Trading Day to be mutually agreed by the Company and the Purchaser (not to be later than 30 days
from the date of this Agreement) following the execution and delivery of this Agreement and the License and Collaboration Agreement by
the applicable parties thereto and the satisfaction or waiver of all of the conditions set forth in Sections 2.1, 2.2, 5.1 and 5.2 hereof. Subject to
the immediately preceding sentence, the Company and the Purchaser agree that the Closing Date will be December 20, 2021.

“Commission” means the United States Securities and Exchange Commission.

securities into which the Common Stock may hereafter be reclassified or changed into.

“Common Stock”  means  the  Company’s  common  stock,  par  value  $0.001  per  share,  and  also  includes  any  other  class  of

to acquire at any time Common Stock, including, without limitation, any

“Common Stock Equivalents” means any securities of the Company or any Subsidiary which would entitle the holder thereof

debt,  preferred  stock,  rights,  options,  warrants  or  other  instrument  that  is  at  any  time  convertible  into  or  exchangeable  for,  or  otherwise
entitles  the  holder  thereof  to  receive,  Common  Stock  or  other  securities  that  entitle  the  holder  to  receive,  directly  or  indirectly,  Common
Stock.

“Company” has the meaning set forth in the Preamble.

“Company Counsel” means Wilson Sonsini Goodrich & Rosati, Professional Corporation.

“Company Deliverables” has the meaning set forth in Section 2.2(a).

“Control” (including the terms “controlling”, “controlled by” or “under common control with”) means the possession, direct
or indirect, of the power to direct or cause the direction of the management and policies of a Person, whether through the ownership of voting
securities, by contract or otherwise.

“DTC” has the meaning set forth in Section 4.1(e).

“Environmental Laws” has the meaning set forth in Section 3.1(dd).

regulations promulgated thereunder.

“Exchange  Act”  means  the  Securities  Exchange  Act  of  1934,  as  amended,  or  any  successor  statute,  and  the  rules  and

“FDA” has the meaning set forth in Section 3.1(ll).

“GAAP” means U.S. generally accepted accounting principles, as applied by the Company.

“Health Care Laws” has the meaning set forth in Section 3.1(ll).

“HIPAA” has the meaning set forth in Section 3.1(qq).

“Indemnified Person” has the meaning set forth in Section 4.7.

“Intellectual Property Assets” has the meaning set forth in Section 3.1(p).

“Intellectual Property Rights” has the meaning set forth in Section 3.1(p).

“Investment Company Act” has the meaning set forth in Section 3.1(w).

“Legacy Alpine” has the meaning set forth in Section 3.1(p).

the Company and the Purchaser on or about the date hereof.

“License and Collaboration Agreement” means that certain License and Collaboration Agreement to be entered into between

“Material Adverse Effect” has the meaning set forth in Section 3.1(b).

“Money Laundering Laws” has the meaning set forth in Section 3.1(pp).

“New York Courts” means the state and federal courts sitting in the City of New York, Borough of Manhattan.

“OFAC” has the meaning set forth in Section 3.1(kk).

“Off-Balance Sheet Transaction” has the meaning set forth in Section 3.1(gg).

“Outside Date” means the thirtieth day following the date of this Agreement.

“Per Share Purchase Price” means $15.756625 per Share.

2

“Permits” has the meaning set forth in Section 3.1(n).

“Person”  means  an  individual,  corporation,  partnership,  limited  liability  company,  trust,  business  trust,  association,  joint
stock  company,  joint  venture,  sole  proprietorship,  unincorporated  organization,  governmental  authority  or  any  other  form  of  entity  not
specifically listed herein.

trading, which, as of the date of this Agreement and the Closing Date, shall be the Nasdaq Global Market.

“Principal Trading Market” means the Trading Market on which the Common Stock is primarily listed on and quoted for

partial proceeding, such as a deposition), whether commenced or threatened.

“Proceeding”  means  an  action,  claim,  suit,  investigation  or  proceeding  (including,  without  limitation,  an  investigation  or

“Purchaser” has the meaning set forth in the Preamble.

“Purchaser Deliverables” has the meaning set forth in Section 2.2(b).

“Purchaser Party” has the meaning set forth in Section 4.7.

“Regulation S-X” has the meaning set forth in Section 3.1(i).

“Regulatory Authorities” has the meaning set forth in Section 3.1(oo).

“Restricted Period” has the meaning set forth in Section 4.1(b).

“Required Approvals” has the meaning set forth in Section 3.1(e).

from time to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule.

“Rule 144” means Rule 144 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended

“Sarbanes-Oxley Act” has the meaning set forth in Section 3.1(s).

“SEC Reports” has the meaning set forth in Section 3.1(h).

“Secretary’s Certificate” has the meaning set forth in Section 2.2(a)(vii).

“Securities Act” has the meaning set forth in the Recitals.

“Shares” has the meaning set forth in Section 2.1(a).

“Short Sales”  include,  without  limitation,  (i)  all  “short  sales”  as  defined  in  Rule  200  promulgated  under  Regulation  SHO
under the Exchange Act, whether or not against the box, and all types of direct and indirect stock pledges, forward sale contracts, options,
puts,  calls,  short  sales,  swaps,  “put  equivalent  positions”  (as  defined  in  Rule  16a-1(h)  under  the  Exchange  Act)  and  similar  arrangements
(including on a total return basis), and (ii) sales and other transactions through non-U.S. broker dealers or foreign regulated brokers (but shall
not be deemed to include the location and/or reservation of borrowable shares of Common Stock).

“Subscription Amount” has the meaning set forth in Section 2.1(a).

“Subsidiaries” means the consolidated subsidiaries of the Company.

“Threshold Amount” means 19.99% of the outstanding shares of Common Stock or the voting power of the Company.

“Trading Affiliate” has the meaning set forth in Section 3.2(i).

3

“Trading Day” means (i) a day on which the Common Stock is listed or quoted and traded on its Principal Trading Market
(other than the OTC Bulletin Board), or (ii) if the Common Stock is not listed on a Trading Market (other than the OTC Bulletin Board), a
day on which the Common Stock is traded in the over-the-counter market, as reported by the OTC Bulletin Board, or (iii) if the Common
Stock is not quoted on any Trading Market, a day on which the Common Stock is quoted in the over-the-counter market as reported in the
“pink sheets” by Pink Sheets LLC (or any similar organization or agency succeeding to its functions of reporting prices); provided, that in the
event that the Common Stock is not listed or quoted as set forth in (i), (ii) and (iii) hereof, then Trading Day shall mean a Business Day.

“Trading Market” means whichever of the New York Stock Exchange, the NYSE MKT, the Nasdaq Global Select Market,
the Nasdaq Global Market, the Nasdaq Capital Market or the OTC Bulletin Board on which the Common Stock is listed or quoted for trading
on the date in question.

mailing address of 1717 Arch St., Suite 1300 Philadelphia, PA 191036, or any successor transfer agent for the Company.

“Transfer  Agent”  means  Broadridge  Corporate  Issuer  Solutions,  Inc.,  the  current  transfer  agent  of  the  Company,  with  a

“Treasury” has the meaning set forth in Section 3.2(q).

“XBRL” has the meaning set forth in Section 3.1(i).

ARTICLE II.
PURCHASE AND SALE

2.1    Closing.

(a)    Amount. Subject to the terms and conditions set forth in this Agreement, at the Closing, the Company shall issue and
sell to the Purchaser, and the Purchaser shall purchase from the Company, 951,980 shares of Common Stock (the “Shares”) at the Per Share
Purchase Price, for aggregate consideration of $14,999,991.87 (the “Subscription Amount”).

(b)    Closing. The Closing of the purchase and sale of the Shares shall take place at the offices of Wilson Sonsini Goodrich
&  Rosati,  Professional  Corporation,  701  Fifth  Avenue,  Suite  5100,  Seattle,  WA  98104,  on  the  Closing  Date  or  at  such  other  locations  or
remotely by facsimile transmission or other electronic means as the parties may mutually agree.

Subscription Amount via wire transfer of immediately available funds pursuant to the wire instructions attached hereto as Exhibit A.

(c)        Form  of  Payment.  On  the  Closing  Date,  the  Purchaser  shall  deliver,  or  cause  to  be  delivered  to  the  Company,  the

2.2    Closing Deliveries. (a) On or prior to the Closing, the Company shall issue, deliver or cause to be delivered to the Purchaser the

following (the “Company Deliverables”):

(i)    this Agreement, duly executed by the Company;

(ii)    instructions to the Transfer Agent to deliver to the Purchaser a book-entry statement evidencing the Shares;

(iii)    a certificate of the Secretary of the Company (the “Secretary’s Certificate”), dated as of the Closing Date, (a)
certifying  the  resolutions  adopted  by  the  Board  of  Directors  of  the  Company  or  a  duly  authorized  committee  thereof  approving  the
transactions  contemplated  by  this  Agreement  and  the  issuance  of  the  Shares,  (b)  certifying  the  current  versions  of  the  certificate  of
incorporation,  as  amended,  and  bylaws  of  the  Company  and  (c)  certifying  as  to  the  signatures  and  authority  of  persons  signing  this
Agreement and related documents on behalf of the Company, in the form attached hereto as Exhibit B;

(iv)    the Compliance Certificate referred to in Section 5.1(i);

4

Delaware, as of a date within five (5) Business Days of the Closing Date;

(v)        a  certificate  evidencing  the  good  standing  of  the  Company  issued  by  the  Secretary  of  State  of  the  State  of

date within five (5) Business Days of the Closing Date; and

(vi)    a certificate of existence and authorization issued by the Secretary of State of the State of Washington, as of a

State of Delaware, as of a date within five (5) Business Days of the Closing Date.

(vii)    a certified copy of the Certificate of Incorporation of the Company, as certified by the Secretary of State of the

“Purchaser Deliverables”):

(b)        On  or  prior  to  the  Closing,  the  Purchaser  shall  deliver  or  cause  to  be  delivered  to  the  Company  the  following  (the

(i)    this Agreement, duly executed by the Purchaser;

(ii)    the Subscription Amount;

(iii)        a  fully  completed  and  duly  executed  Accredited  Investor  Questionnaire,  satisfactory  to  the  Company,  and
Book-Entry Questionnaire in the forms attached hereto as Exhibits C-1 and C-2, respectively, which Accredited Investor Questionnaire and
Book-Entry Questionnaire must be received by the Company no later than 3:00 p.m., Eastern time, on the Business Day immediately prior to
the Closing Date.

ARTICLE III.
REPRESENTATIONS AND WARRANTIES

3.1    Representations and Warranties of the Company. Except as disclosed in the SEC Reports, the Company hereby represents and
warrants as of the date hereof and the Closing Date (except for the representations and warranties that speak as of a specific date, which shall
be made as of such date), to the Purchaser:

(a)    Subsidiaries. The Company does not own or control, directly or indirectly, any corporation, association or other entity
other than the subsidiaries listed in Exhibit 21.1 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020
except for subsidiaries that in the aggregate would not constitute a “significant subsidiary” (as defined in Rule 405 under the Securities Act).
The Company’s wholly-owned subsidiary, AIS Operating Co., Inc., is a “significant subsidiary” (as defined in Rule 405 under the Securities
Act).

(b)        Organization  and  Qualification.  The  Company  and  each  of  its  Subsidiaries  have  been  duly  organized,  are  validly
existing as corporations or limited liability entities and are in good standing under the laws of their respective jurisdictions of organization,
except where the failure to be so duly organized, validly existing and in good standing would not reasonably be expected to have a Material
Adverse  Effect.  The  Company  and  each  of  its  Subsidiaries  are,  and  will  be,  duly  licensed  or  qualified  as  a  foreign  corporation  for  the
transaction of business and in good standing under the laws of each other jurisdiction in which their respective ownership or lease of property
or the conduct of their respective businesses requires such license or qualification, and have all corporate power and authority necessary to
own or hold their respective properties and to conduct their respective businesses as described in the SEC Reports, except where the failure to
be so qualified or in good standing or have such power or authority would not, individually or in the aggregate, have a material adverse effect
or  would  reasonably  be  expected  to  have  a  material  adverse  effect  on  or  affecting  the  assets,  business,  operations,  earnings,  properties,
condition (financial or otherwise), prospects, stockholders’ equity or results of operations of the Company and the Subsidiaries taken as a
whole,  or  prevent  or  materially  interfere  with  the  consummation  of  the  transactions  contemplated  hereby  (a  “Material  Adverse  Effect”);
provided, however, that any of the following, either alone or in combination, shall not be deemed a Material Adverse Effect: (i) effects caused
by changes or circumstances affecting general market conditions in the U.S. economy or which are generally applicable to the industry in
which  the  Company  operates,  provided  that  such  effects  are  not  borne  disproportionately  by  the  Company,  (ii)  effects  resulting  from  or
relating to the announcement or disclosure of the sale of the Shares or other transactions contemplated hereby, or (iii) effects caused by any
event,

5

occurrence or condition resulting from or relating to the taking of any action in accordance with this Agreement.

(c)        Authorization.  The  Company  has  all  requisite  corporate  power  and  authority  to  execute,  deliver  and  perform  its
obligations contemplated by this Agreement. This Agreement has been duly and validly authorized, executed and delivered by the Company.

(d)        No Conflicts.  The  issue  and  sale  of  the  Shares,  the  execution,  delivery  and  performance  of  this  Agreement  and  the
consummation  of  the  transactions  contemplated  hereby  will  not  (i)  conflict  with  or  result  in  a  breach  or  violation  of  any  of  the  terms  or
provisions  of,  impose  any  lien,  charge  or  encumbrance  upon  any  property  or  assets  of  the  Company  and  its  Subsidiaries,  or  constitute  a
default under, any indenture, mortgage, deed of trust, loan agreement, license, lease or other agreement or instrument to which the Company
or any of its subsidiaries is a party or by which the Company or any of its Subsidiaries is bound or to which any of the property or assets of
the Company or any of its Subsidiaries is subject; (ii) result in any violation of the provisions of the certificate of incorporation, charter or
bylaws (or similar organizational documents) of the Company or any of its Subsidiaries; or (iii) result in any violation of any statute or any
judgment, order, decree, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its
Subsidiaries  or  any  of  their  properties  or  assets,  except,  with  respect  to  clauses  (i)  and  (iii),  for  such  conflicts,  breaches,  violations,  liens,
charges, encumbrances or defaults that would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(e)    Filings, Consents and Approvals. No consent, approval, authorization or order of, or filing, registration or qualification
with, any court or governmental agency or body having jurisdiction over the Company or any of its Subsidiaries or any of their respective
properties  or  assets  is  required  for  the  issue  and  sale  of  the  Shares,  the  execution,  delivery  and  performance  by  the  Company  of  this
Agreement,  the  consummation  of  the  transactions  contemplated  hereby,  except  for  (i)  such  consents,  approvals,  authorizations,  orders,
filings, registrations or qualifications as may be required under the Exchange Act, (ii) filings required by applicable state or foreign securities
laws, (iii) the filing of any requisite notices and/or application(s) to the Principal Trading Market for the issuance and sale of the Shares and
the listing of the Shares for trading or quotation, as the case may be, thereon in the time and manner required thereby, and (iv) those that have
been made or obtained prior to the date of this Agreement (collectively, the “Required Approvals”).

(f)    Issuance of the Shares. The Shares have been duly authorized and, when issued and paid for in accordance with the
terms of this Agreement, will be duly authorized and validly issued, fully paid and nonassessable and free and clear of all liens, other than
restrictions on transfer provided for herein or imposed by applicable securities laws, and shall not be subject to preemptive or similar rights.
Assuming the accuracy of the representations and warranties of the Purchaser in this Agreement, the Shares will be issued in compliance with
all applicable federal and state securities laws.

(g)    Capitalization. The authorized capital of the Company consists of 200,000,000 shares of Common Stock, 30,468,159
shares of which are issued and 29,217,692 shares of which are outstanding as of September 30, 2021, and 10,000,000 shares of preferred
stock, par value $0.001 per share, none of which are currently issued and outstanding as of September 30, 2021. Under the Company’s Plans
(as  defined  below)  (i)  options  to  acquire  5,692,264  shares  of  Common  Stock  have  been  granted  and  are  currently  outstanding  as  of
September 30, 2021, (ii) no restricted shares of Common Stock have been granted and are currently outstanding as of September 30, 2021,
(iii) zero shares of Common Stock have been reserved for issuance as of September 30, 2021 upon the settlement of outstanding restricted
stock units granted under the Company’s Plans, (iv) 652,074 shares of Common Stock remain available for future issuance as of September
30, 2021 to directors, executive officers, employees and consultants of the Company pursuant to the Company’s 2018 Equity Incentive Plan,
as amended, (the “2018 Plan”), and (v) 45,211 shares of Common Stock have been reserved for issuance as of September 30, 2021 under the
Company’s Employee Stock Purchase Plan. Since September 30, 2021 and except as disclosed in the SEC Reports, the Company has not
issued  any  equity  securities,  other  than  those  issued  pursuant  to  the  2018  Plan  and  any  of  the  Company’s  other  equity  incentive  plans
disclosed  in  the  SEC  Reports  (including  employee  stock  purchase  plans  and  any  inducement  equity  plans  or  awards  established  in
compliance with Nasdaq Marketplace Rules) (collectively, together with the 2018 Plan, the “Plans”). The Company has outstanding warrants
to purchase 8,851,116 shares of Common Stock as of September 30, 2021 (the “Outstanding

6

Warrants”). Except as set forth in the Company SEC Reports, and other than the shares of Common Stock reserved for issuance under the
2018 Plan and the Outstanding Warrants, there are no outstanding options, rights (including conversion or preemptive rights and rights of
first refusal), proxy or shareholder agreements, or agreements of any kind for the purchase or acquisition from the Company of any of its
securities. The Company has an authorized capitalization as set forth in the SEC Reports, and all of the issued shares of the Company have
been  duly  authorized  and  validly  issued,  are  fully  paid  and  non-assessable,  conform  in  all  material  respects  to  the  description  thereof
contained in the SEC Reports and were not issued in violation of any preemptive right, resale right, right of first refusal or similar right. All
of the Company’s options, warrants and other rights to purchase or exchange any securities for shares of the Company’s capital stock have
been duly authorized and validly issued, and conform in all material respects to the description thereof contained in the SEC Reports. All of
the  issued  shares  of  capital  stock  or  other  ownership  interests  of  each  Subsidiary  of  the  Company  have  been  duly  authorized  and  validly
issued,  are  fully  paid  and  non-assessable  and  are  owned  directly  or  indirectly  by  the  Company,  free  and  clear  of  all  liens,  encumbrances,
equities  or  claims,  except  for  such  liens,  encumbrances,  equities  or  claims  as  would  not,  individually  or  in  the  aggregate,  reasonably  be
expected to have a Material Adverse Effect. No Person is entitled to preemptive rights, rights of first refusal, rights of participation or similar
rights with respect to any securities of the Company, including with respect to the issuance of Shares contemplated hereby. Except as set forth
in the Company SEC Documents, there are no voting agreements, registration rights agreements or other agreements of any kind between the
Company and any other Person relating to the securities of the Company, including the Shares.

(h)    SEC Reports. The Company has filed all reports, schedules, forms, statements and other documents required to be filed
by  it  under  the  Exchange  Act,  including  pursuant  to  Section  13(a)  or  15(d)  thereof,  for  the  two  years  preceding  the  date  hereof  (or  such
shorter period as the Company was required by law or regulation to file such material) (the foregoing materials, including the exhibits thereto
and  documents  incorporated  by  reference  therein,  being  collectively  referred  to  herein  as  the  “SEC  Reports”)  on  a  timely  basis  or  has
received a valid extension of such time of filing and has filed any such SEC Reports prior to the expiration of any such extension, except
where the failure to file on a timely basis would not have or reasonably be expected to result in a Material Adverse Effect (including, for this
purpose only, any failure that would prevent the Purchaser from using Rule 144 to resell any Shares). As of their respective filing dates, or to
the extent corrected by a subsequent restatement, the SEC Reports complied in all material respects with the requirements of the Securities
Act and the Exchange Act and the rules and regulations of the Commission promulgated thereunder, and none of the SEC Reports, when
filed, contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to
make the statements therein, in light of the circumstances under which they were made, not misleading. The Company has never been an
issuer subject to Rule 144(i) under the Securities Act.

(i)    Financial Statements. The historical financial statements (including the related notes and supporting schedules) included
in  the  SEC  Reports  comply  as  to  form  in  all  material  respects  with  the  requirements  of  Regulation  S-X  under  the  Securities  Act
(“Regulation S-X”)  and  present  fairly,  in  all  material  respects,  the  financial  condition,  results  of  operations  and  cash  flows  of  the  entities
purported  to  be  shown  thereby  at  the  dates  and  for  the  periods  indicated  and  have  been  prepared  in  conformity  with  GAAP  applied  on  a
consistent basis throughout the periods involved. All disclosures contained in the SEC Reports regarding “non-GAAP financial measures” (as
defined by the rules and regulations of the Commission) comply with Regulation G of the Exchange Act and Item 10 of Regulation S-K of
the Securities Act, to the extent applicable. There are no financial statements (historical or pro forma) that are required to be included in the
SEC  Reports  that  are  not  so  included  as  required.  The  interactive  data  in  eXtensible  Business  Reporting  Language  (“XBRL”)  included  or
incorporated  by  reference  in  the  SEC  Reports  fairly  present  the  information  called  for  in  all  material  respects  and  have  been  prepared  in
accordance with the Commission’s rules and guidelines applicable thereto.

(j)    Material Changes. Except as would not, in the aggregate, reasonably be expected to have a Material Adverse Effect,
since the date of the latest audited financial statements included in the SEC Reports, and, except as disclosed in a subsequent SEC Report
filed prior to the date hereof, neither the Company nor any of its Subsidiaries has (i) sustained any loss or interference with its business from
fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order
or decree, (ii) issued or granted any securities (other than pursuant to employee benefit plans, qualified stock option plans or other equity
compensation  plans  or  arrangements  existing  on  the  date  hereof  and  disclosed  in  the  SEC  Reports),  (iii)  incurred  any  material  liability  or
obligation, direct or

7

contingent,  other  than  liabilities  and  obligations  that  were  incurred  in  the  ordinary  course  of  business,  (iv)  entered  into  any  material
transaction not in the ordinary course of business, or (v) declared or paid any dividend on its share capital; and since such date, except as
disclosed in the SEC Reports, there has not been any change in the share capital, long-term debt, net current assets or short-term debt of the
Company or any of its Subsidiaries or any adverse change, or any development involving a prospective adverse change, in or affecting the
condition (financial or otherwise), prospects, results of operations, stockholders’ equity, properties, management or business of the Company
and its Subsidiaries taken as a whole.

(k)    Litigation. Except as disclosed in the SEC Reports, there are no legal or governmental proceedings pending to which
the Company or any of its Subsidiaries is a party or of which any property or assets of the Company or any of its Subsidiaries is the subject
that, if determined adversely to the Company, would, in the aggregate, reasonably be expected to have a Material Adverse Effect or would, in
the aggregate, reasonably be expected to have a material adverse effect on the performance of this Agreement or the consummation of the
transactions contemplated hereby; and to the Company’s knowledge, no such proceedings are threatened or contemplated by governmental
authorities or others.

(l)        No  Labor  Dispute;  Compliance  with  Labor  Laws.  No  labor  disturbance  by  or  dispute  with  the  employees  of  the
Company or any of its Subsidiaries exists or, to the knowledge of the Company, is imminent that could reasonably be expected to have a
Material Adverse Effect. Neither the Company nor any of its Subsidiaries is in violation of or has received written notice of any violation
with respect to any federal or state law relating to discrimination in the hiring, promotion or pay of employees, nor any applicable federal or
state  wage  and  hour  laws,  nor  any  state  law  precluding  the  denial  of  credit  due  to  the  neighborhood  in  which  a  property  is  situated,  the
violation of any of which could reasonably be expected to have a Material Adverse Effect.

(m)    No Default. Except as disclosed in the SEC Reports, neither the Company nor any of its Subsidiaries (i) is in violation
of its certificate of incorporation, charter or bylaws (or similar organizational documents), (ii) is in default, and no event has occurred that,
with notice or lapse of time or both, would constitute such a default, in the due performance or observance of any term, covenant, condition
or other obligation contained in any indenture, mortgage, deed of trust, loan agreement, license or other agreement or instrument to which it
is a party, by which it is bound or to which any of its properties or assets is subject, (iii) is in violation of any statute or any order, rule or
regulation of any court or governmental agency or body having jurisdiction over it or its property or assets or (iv) has failed to obtain any
license,  permit,  certificate,  franchise  or  other  governmental  authorization  or  permit  necessary  to  the  ownership  of  its  property  or  to  the
conduct  of  its  business,  except  in  the  case  of  clauses  (ii)  and  (iii),  to  the  extent  any  such  conflict,  breach,  violation  or  default  would  not,
individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(n)        Regulatory  Permits.  The  Company  and  its  Subsidiaries  possess  all  material  certificates,  authorizations,  clearances,
approvals, registrations, exemptions, licenses or permits required by state, federal or foreign regulatory agencies or bodies to conduct their
respective businesses as currently conducted and as described in the SEC Reports (“Permits”), and all such Permits are valid, current and in
full force and effect, except where the failure to so possess or be valid, current and in full force and effect would not, individually or in the
aggregate, reasonably be expected to result in a Material Adverse Effect. Neither the Company nor any of its Subsidiaries is in violation of,
or  in  default  under,  any  of  the  Permits  or  has  received  any  notice  of  proceedings  relating  to  the  revocation  or  modification  of,  or  non-
compliance with, any such certificate, authorization or permit. Neither the Company nor any of its Subsidiaries has received any notice of
proceedings  relating  to  the  revocation  or  modification  of  any  Permits  which,  singly  or  in  the  aggregate,  if  the  subject  of  an  unfavorable
decision, ruling or finding, would reasonably be expected to result in a Material Adverse Effect. The Company has not received any written
notice denying, revoking or modifying any “approved enterprise,” “benefited enterprise” or “preferred enterprise” status with respect to any
of the Company’s facilities or operations.

(o)        Title  to  Assets.  The  Company  and  each  of  its  Subsidiaries  have  good  and  marketable  title  in  fee  simple  to  all  real
property and good and marketable title to all personal property owned by them, that are material to the business of the Company, in each case
free and clear of all liens, encumbrances and defects, except for such liens, encumbrances and defects as do not materially affect the value of
such  property  and  do  not  materially  interfere  with  the  use  made  and  proposed  to  be  made  of  such  property  by  the  Company  and  its
Subsidiaries. All assets held under lease by the Company and its Subsidiaries, that are

8

material  to  the  business  of  the  Company,  are  held  by  them  under  valid,  subsisting  and  enforceable  leases,  with  such  exceptions  as  do  not
materially interfere with the use made and proposed to be made of such assets by the Company and its Subsidiaries.

(p)    Patents and Trademarks. To the knowledge of the Company, the Company and its Subsidiaries own or possess the valid
right to use all (i) patents, patent applications, trademarks, trademark registrations, service marks, service mark registrations, internet domain
name  registrations,  copyrights,  copyright  registrations,  licenses  and  trade  secret  rights  (collectively,  “Intellectual  Property  Rights”)  and
(ii)  inventions,  software,  works  of  authorships,  trademarks,  service  marks,  trade  names,  databases,  formulae,  know  how,  Internet  domain
names and other intellectual property (including trade secrets and other unpatented and/or unpatentable proprietary confidential information,
systems, or procedures) (collectively, “Intellectual Property Assets”) necessary to conduct their respective businesses as currently conducted,
and as proposed to be conducted and described in the SEC Reports. The Company and its subsidiaries have not received written notice of any
challenge,  which  is  still  pending,  by  any  other  person  to  the  rights  of  the  Company  and  its  Subsidiaries  with  respect  to  any  Intellectual
Property Rights or Intellectual Property Assets owned or used by the Company or its Subsidiaries, except as would not, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect. To the knowledge of the Company, the Company and its Subsidiaries’
respective businesses as now conducted do not give rise to any material infringement of, any material misappropriation of, or other material
violation of, any valid and enforceable Intellectual Property Rights of any other person. To the knowledge of the Company, all licenses for
the use of the Intellectual Property Rights described in the SEC Reports are valid, binding upon and enforceable by or against the parties
thereto in accordance with their terms. The Company has complied in all material respects with, and is not in breach nor has received any
asserted  or  threatened  claim  of  material  breach  of  any  Intellectual  Property  license,  and  the  Company  has  no  knowledge  of  any  material
breach by any other person to any Intellectual Property license to which the Company is a party. No claim has been made, and is currently
pending,  against  the  Company  alleging  the  infringement  by  the  Company  of  any  patent,  trademark,  service  mark,  trade  name,  copyright,
trade secret, license in or other Intellectual Property Right or franchise right of any person, and, to the knowledge of the Company, there are
no facts that would form a reasonable basis for such claim, except as would not, individually or in the aggregate, reasonably be expected to
have  a  Material  Adverse  Effect.  The  Company  has  taken  all  reasonable  steps  to  protect,  maintain  and  safeguard  its  Intellectual  Property
Rights,  including  the  execution  of  appropriate  nondisclosure  and  confidentiality  agreements.  The  consummation  of  the  transactions
contemplated hereby will not result in the loss or impairment of or payment of any additional amounts with respect to, nor require the consent
of any other person in respect of, the Company’s right to own, use, or hold for use any of the Intellectual Property Rights as owned, used or
held for use in the conduct of the business as currently conducted. To the knowledge of the Company, no employee of Legacy Alpine and,
since July 24, 2017, no employee of the Company is in, or has ever been, in violation in any material respect of any term of any employment
contract,  patent  disclosure  agreement,  invention  assignment  agreement,  non-competition  agreement,  non-solicitation  agreement,  non-
disclosure agreement or any restrictive covenant to or with a former employer where the basis of such violation relates to such employee’s
employment  with  the  Company,  or  actions  undertaken  by  the  employee  while  employed  with  the  Company.  For  purposes  of  this  section,
“Legacy Alpine” means Alpine Immune Sciences, Inc., which was the surviving entity following its merger with a wholly-owned subsidiary
of Nivalis Therapeutics, Inc. on July 24, 2017 and renamed as AIS Operating Co., Inc.

(q)    Insurance. Except as would not reasonably be expected to have a Material Adverse Effect, the Company and each of its
Subsidiaries maintain insurance from nationally recognized, in the applicable country, insurers in such amounts and covering such risks as is
commercially reasonable in accordance with customary practices for companies engaged in similar businesses and similar industries for the
conduct  of  their  respective  businesses  and  the  value  of  their  respective  properties  and  as  is  customary  for  companies  engaged  in  similar
businesses in similar industries. All insurance policies of the Company and its Subsidiaries are in full force and effect; the Company and each
of its Subsidiaries are in compliance with the terms of such policies in all material respects; neither the Company nor any of its Subsidiaries
has received notice from any insurer or agent of such insurer that capital improvements or other expenditures are required or necessary to be
made in order to continue such insurance; there are no material claims by the Company or any of its Subsidiaries under any such policy or
instrument as to which any insurance company is denying liability or defending under a reservation of rights clause; and neither the Company
nor any such Subsidiary has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage
expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not reasonably be
expected to have a Material Adverse Effect.

9

(r)    Transactions With Affiliates and Employees. No relationship, direct or indirect, exists between or among the Company,
on the one hand, and the directors, officers, stockholders, customers or suppliers of the Company, on the other hand, that is required to be
described in the SEC Reports that is not so described.

(s)    Internal Accounting Controls. The Company and each of its Subsidiaries maintain internal accounting controls designed
to  provide  reasonable  assurances  regarding  the  reliability  of  financial  reporting  and  the  preparation  of  financial  statements  for  external
purposes in accordance with GAAP, including, but not limited to, internal accounting controls sufficient to provide reasonable assurance that
(i) transactions are executed in accordance with management’s general or specific authorization, (ii) transactions are recorded as necessary to
permit preparation of the Company’s financial statements in conformity with GAAP and to maintain accountability for its assets, (iii) access
to the Company’s assets is permitted only in accordance with management’s general or specific authorization, (iv) the recorded accountability
for  the  Company’s  assets  is  compared  with  existing  assets  at  reasonable  intervals  and  appropriate  action  is  taken  with  respect  to  any
differences, and (v) the interactive data in XBRL included or incorporated by reference in the SEC Reports fairly present the information
called  for  in  all  material  respects  and  are  prepared  in  accordance  with  the  Commission’s  rules  and  guidelines  applicable  thereto  (it  being
understood that this subsection shall not to require the Company to comply with Section 404 of the Sarbanes-Oxley Act of 2002, as amended,
and the rules and regulations promulgated thereunder (collectively, the “Sarbanes-Oxley Act”) as of an earlier date than it would otherwise be
required to so comply under applicable law). Except as disclosed in the SEC Reports, as of the date of the most recent balance sheet of the
Company  and  its  consolidated  subsidiaries  audited  by  Ernst  &  Young  LLP,  there  were  no  material  weaknesses  in  the  Company’s  internal
controls.

(t)    Sarbanes-Oxley Compliance. There is and has been no failure on the part of the Company or, to the knowledge of the
Company, any of the Company’s directors or officers, in their capacities as such, to comply with any provision of the Sarbanes-Oxley Act
that are applicable to the Company or its directors or officers in their capacities as directors or officers of the Company.

(u)        No  Other  Brokers.  Neither  the  Company  nor  any  of  its  Subsidiaries  is  a  party  to  any  contract,  agreement  or
understanding  with  any  person  that  would  give  rise  to  a  valid  claim  against  any  of  them  for  a  brokerage  commission,  finder’s  fee  or  like
payment in connection with the offering and sale of the Shares.

(v)    Private Placement. Assuming the accuracy of the Purchaser’s representations and warranties set forth in Section 3.2 of
this  Agreement  and  the  accuracy  of  the  information  disclosed  in  the  Accredited  Investor  Questionnaire  provided  by  the  Purchaser,  no
registration under the Securities Act is required for the offer and sale of the Shares by the Company to the Purchaser hereunder. Assuming the
making  and  the  obtaining  of  the  Required  Approvals,  the  issuance  and  sale  of  the  Shares  hereunder  does  not  contravene  the  rules  and
regulations of the Trading Market.

(w)    Investment Company     The Company is not, and will not be, after giving effect to the offer and sale of the Shares and
the application of the proceeds therefrom as described in Section 4.6, (i) required to register as an “investment company” (within the meaning
of the Investment Company Act of 1940, as amended (the “Investment Company Act”)) or (ii) a “business development company” (as defined
in Section 2(a)(48) of the Investment Company Act).

(x)        Registration Rights.  Except  as  disclosed  in  the  SEC  Reports,  there  are  no  contracts,  agreements  or  understandings
between  the  Company  and  any  person  granting  such  person  the  right  to  require  the  Company  to  file  a  registration  statement  under  the
Securities Act with respect to any securities of the Company owned or to be owned by such person.

(y)    Exchange Act Registration and Listing of the Common Stock. The Company’s Common Stock is registered pursuant to
Section 12(b) of the Exchange Act and listed on the Principal Trading Market; the Company has taken no action designed to, or reasonably
likely to have the effect of, terminating the registration of the Common Stock under the Exchange Act or delisting the Common Stock from
the Principal Trading Market, nor has the Company received any notification that the Commission or FINRA is contemplating terminating
such registration or listing.

10

(z)        Application  of  Takeover  Protections;  Rights  Agreements.  The  Company  and  the  Board  of  Directors  have  taken  all
necessary  action,  if  any,  in  order  to  render  inapplicable  any  control  share  acquisition,  business  combination,  poison  pill  (including  any
distribution under a rights agreement) or other similar anti-takeover provision under the Company’s charter documents or the laws of its state
of incorporation that is or could reasonably be expected to become applicable to the Purchaser as a result of the Purchaser and the Company
fulfilling their obligations or exercising their rights hereunder, including, without limitation, the Company’s issuance of the Shares and the
Purchaser’s ownership of the Shares.

(aa)        No  Integrated  Offering.  Assuming  the  accuracy  of  the  Purchaser’s  representations  and  warranties  set  forth  in
Section 3.2, none of the Company, its Subsidiaries nor, to the knowledge of the Company, any of its Affiliates or any Person acting on its
behalf has, directly or indirectly, at any time within the past six (6) months, made any offers or sales of any Company security or solicited
any  offers  to  buy  any  security  under  circumstances  that  would  (i)  eliminate  the  availability  of  the  exemption  from  registration  under  the
Securities Act in connection with the offer and sale by the Company of the Shares as contemplated hereby or (ii) cause the offering of the
Shares pursuant to this Agreement to be integrated with prior offerings by the Company for purposes of any applicable law, regulation or
stockholder approval provisions, including, without limitation, under the rules and regulations of any Trading Market on which any of the
securities of the Company are listed or designated.

(bb)        Tax Matters.  The  Company  and  each  of  its  Subsidiaries  have  filed  all  federal,  state,  local  and  foreign  tax  returns
required to be filed through the date hereof, subject to permitted extensions (except where the failure to file would not individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect), and have paid all taxes due (except where the failure to pay would not
individually  or  in  the  aggregate,  reasonably  be  expected  to  have  a  Material  Adverse  Effect),  and  no  tax  deficiency  has  been  determined
adversely to the Company or any of its Subsidiaries, nor does the Company have any knowledge of any tax deficiencies that have been, or
would reasonably be expected to be asserted against the Company, that would, in the aggregate, reasonably be expected to have a Material
Adverse Effect.

(cc)    Environmental Matters. Except as disclosed in the SEC Reports, the Company and each of its Subsidiaries (i) are, and
at all times since January 1, 2015 were, in compliance with all laws, regulations, ordinances, rules, orders, judgments, decrees, permits or
other  legal  requirements  of  any  governmental  authority,  including  without  limitation  any  international,  foreign,  national,  state,  provincial,
regional, or local authority, relating to pollution, the protection of human health or safety, the environment, or natural resources, or to use,
handling,  storage,  manufacturing,  transportation,  treatment,  discharge,  disposal  or  release  of  hazardous  or  toxic  substances  or  wastes,
pollutants  or  contaminants  (collectively,  “Environmental Laws”)  applicable  to  such  entity,  which  compliance  includes,  without  limitation,
obtaining, maintaining and complying with all permits and authorizations and approvals required by Environmental Laws to conduct their
respective  businesses,  and  (ii)  have  not  received  written  notice  or  otherwise  have  knowledge  of  any  actual  or  alleged  violation  of
Environmental Laws, or of any actual or potential liability for or other obligation concerning the presence, disposal or release of hazardous or
toxic substances or wastes, pollutants or contaminants, except in the case of clause (i) or (ii) where such non-compliance, violation, liability
or  other  obligation  would  not,  individually  or  in  the  aggregate,  reasonably  be  expected  to  have  a  Material  Adverse  Effect.  Except  as
described  in  the  SEC  Reports,  (x)  there  are  no  proceedings  that  are  pending,  or  to  the  Company’s  knowledge,  threatened,  against  the
Company or any of its Subsidiaries under Environmental Laws in which a governmental authority is also a party, other than such proceedings
regarding which it is reasonably believed no monetary sanctions of $100,000 or more will be imposed, (y) the Company and its Subsidiaries
are  not  aware  of  any  issues  regarding  compliance  with  Environmental  Laws,  including  any  pending  or  proposed  Environmental  Laws,  or
liabilities or other obligations under Environmental Laws or concerning hazardous or toxic substances or wastes, pollutants or contaminants,
that could reasonably be expected to have a material effect on the capital expenditures, earnings or competitive position of the Company and
its Subsidiaries and (z) none of the Company and its Subsidiaries anticipates material capital expenditures relating to Environmental Laws.

general advertising.

(dd)    No General Solicitation. The Company has not offered or sold any of the Shares by any form of general solicitation or

(ee)        Foreign  Corrupt  Practices  Act.  Neither  the  Company  nor  any  of  its  Subsidiaries,  nor,  to  the  knowledge  of  the
Company,  any  director,  officer,  agent,  employee  or  other  person  associated  with  or  acting  on  behalf  of  the  Company  or  any  of  its
Subsidiaries, has: (i) used any corporate funds for any unlawful

11

contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made any direct or indirect unlawful payment to
any foreign or domestic government official or employee from corporate funds; (iii) violated or is in violation of any provision of the U.S.
Foreign  Corrupt  Practices  Act  of  1977,  the  Organization  for  Economic  Co-operation  and  Development  Convention  on  Bribery  of  Foreign
Public Officials in International Business Transactions, and the rules and regulations thereunder and any other similar foreign or domestic
law  or  regulation;  or  (iv)  made  any  bribe,  rebate,  payoff,  influence  payment,  kickback  or  other  unlawful  payment.  The  Company  has
instituted and maintains policies and procedures designed to ensure continued compliance with the laws and regulations referenced in clause
(iii) of this paragraph.

(ff)    Off Balance Sheet Arrangements. There are no transactions, arrangements or other relationships between and/or among
the Company, and/or, to the knowledge of the Company, any of its Affiliates and any unconsolidated entity, including, but not limited to, any
structural finance, special purpose or limited purpose entity (each, an “Off-Balance Sheet Transaction”) that could reasonably be expected to
materially affect the Company’s liquidity or the availability of or requirements for its capital resources, including those Off-Balance Sheet
Transactions described in the Commission’s Statement about Management’s Discussion and Analysis of Financial Conditions and Results of
Operations (Release Nos. 33-8056; 34-45321; FR-61), and are required to be described in the SEC Reports, which have not been described as
required.

(gg)        Acknowledgment  Regarding  Purchaser’s  Purchase  of  the  Shares.  The  Company  acknowledges  and  agrees  that  the
Purchaser  is  acting  solely  in  the  capacity  of  an  arm’s  length  purchaser  with  respect  to  this  Agreement  and  the  transactions  contemplated
hereby. The Company further acknowledges that Purchaser is not acting as a financial advisor or fiduciary of the Company (or in any similar
capacity) with respect to this Agreement and the transactions contemplated hereby and any advice given by Purchaser or any of its respective
representatives or agents in connection with this Agreement and the transactions contemplated hereby is merely incidental to the Purchaser’s
purchase of the Shares. The Company further represents to the Purchaser that the Company’s decision to enter into this Agreement has been
based solely on the independent evaluation of the transactions contemplated hereby by the Company and its representatives.

(hh)    Regulation M Compliance. The Company and its controlled affiliates have not taken, directly or indirectly, any action
designed to or that has constituted or that could reasonably be expected to cause or result in the stabilization or manipulation of the price of
any security of the Company in connection with the offering of the Shares.

(ii)    PFIC. Subject to the qualifications and assumptions set forth in the SEC Reports, the Company is not, and upon the sale
of the Shares contemplated hereby does not expect to become, a “passive foreign investment company” (as defined in Section 1297 of the
Internal Code Revenue Code of 1986, as amended, and the regulations promulgated thereunder).

(jj)    OFAC. Neither the Company nor any of its Subsidiaries nor, to the knowledge of the Company, any director, officer,
agent, employee or controlled affiliate of the Company or any of its Subsidiaries is currently subject to any U.S. sanctions administered by
the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Company will not directly or indirectly use the
proceeds of the offering of the Shares, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner
or other person or entity, for the purpose of financing the activities of any person currently subject to any U.S. sanctions administered by
OFAC.

(kk)        Compliance  with  Healthcare  Laws  and  Regulations.  The  Company  and,  to  the  knowledge  of  the  Company,  its
directors,  officers,  employees,  and  agents  (while  acting  in  such  capacity)  are,  and  at  all  times  prior  to  the  date  hereof  have  been,  in
compliance  with,  all  health  care  laws  and  regulations  applicable  to  the  Company  or  any  of  its  product  candidates  or  activities,  including
development and testing of pharmaceutical products, kickbacks, recordkeeping, documentation requirements, the hiring of employees (to the
extent  governed  by  Health  Care  Laws,  as  defined  below),  quality,  safety,  privacy,  security,  licensure,  accreditation  or  any  other  aspect  of
developing and testing health care or pharmaceutical products (collectively, “Health Care Laws”), except where such noncompliance would
not, individually or in the aggregate, have a Material Adverse Effect. The Company has not received any notification, correspondence or any
other written or oral communication, including notification of any pending or threatened claim, suit,

12

proceeding, hearing, enforcement, investigation, arbitration or other action from any governmental authority, including, without limitation,
the U.S. Food and Drug Administration (“FDA”), the U.S. Drug Enforcement Administration, the Centers for Medicare & Medicaid Services
and the U.S. Department of Health and Human Services Office of Inspector General, of potential or actual non-compliance by, or liability of,
the  Company  under  any  Health  Care  Laws.  To  the  Company’s  knowledge,  there  are  no  facts  or  circumstances  that  would  reasonably  be
expected to give rise to liability of the Company under any Health Care Laws, except that would not individually or in the aggregate have a
Material Adverse Effect.

Act).

(ll)    Shell Company. The Company is not an “ineligible issuer” (as defined in Rule 405 promulgated under the Securities

(mm)    No Additional Agreements. Other than the License and Collaboration Agreement, the Company does not have any
agreement or understanding with the Purchaser with respect to the transactions contemplated hereby other than as specified herein or, except
as disclosed to the Purchaser in writing, any written agreement regarding the confidentiality and use of confidential information.

(nn)    Clinical Trials. The clinical and pre-clinical trials conducted by or on behalf of or sponsored by the Company, or in
which the Company has participated, that are described in the SEC Reports or the results of which are referred to in the SEC Reports, were
and, if still pending, are being conducted in accordance with standard medical and scientific research procedures and all applicable statutes,
rules  and  regulations  of  the  FDA  and  comparable  drug  regulatory  agencies  outside  of  the  United  States  to  which  they  are  subject
(collectively, the “Regulatory Authorities”), including, without limitation, 21 C.F.R. Parts 50, 54, 56, 58 and 312, and current Good Clinical
Practices  and  Good  Laboratory  Practices;  the  descriptions  in  the  SEC  Reports  of  the  results  of  such  studies  and  trials  are  accurate  and
complete  and  fairly  present  the  data  derived  from  such  trials;  the  Company  has  no  knowledge  of  any  other  trials  the  results  of  which  are
inconsistent with or otherwise call into question the results described or referred to in the SEC Reports; the Company and its Subsidiaries
have each operated and are currently in compliance with all applicable statutes, rules and regulations of the Regulatory Authorities, except
where such noncompliance would not, individually or in the aggregate, have a Material Adverse Effect; and neither the Company, nor any of
its  Subsidiaries,  has  received  any  written  notices,  correspondence  or  other  communication  from  the  Regulatory  Authorities  or  any
governmental  authority  which  threatens  the  termination  or  suspension  of  any  clinical  or  pre-clinical  trials  that  are  described  in  the  SEC
Reports or the results of which are referred to in the SEC Reports, and there are no reasonable grounds for same.

(oo)        Anti-Money  Laundering  Compliance.  The  operations  of  the  Company  and  its  Subsidiaries  are  and  have  been
conducted  at  all  times  in  compliance  with  applicable  financial  recordkeeping  and  reporting  requirements  of  the  Currency  and  Foreign
Transactions  Reporting  Act  of  1970,  as  amended,  the  money  laundering  statutes  of  all  applicable  jurisdictions,  the  rules  and  regulations
thereunder  and  any  applicable  related  or  similar  rules,  regulations  or  guidelines,  issued,  administered  or  enforced  by  any  governmental
agency  (collectively,  the  “Money  Laundering  Laws”)  and  no  action,  suit  or  proceeding  by  or  before  any  court  or  governmental  agency,
authority or body or any arbitrator involving the Company or any of its Subsidiaries with respect to the Money Laundering Laws is pending
or, to the knowledge of the Company, threatened.

(pp)    Compliance with Applicable Laws and Regulations. Except as disclosed in the SEC Reports, the Company and its
Subsidiaries:  (i)  are  and  at  all  times  have  been  in  compliance  with  all  statutes,  rules  and  regulations  applicable  to  the  ownership,  testing,
development, manufacture, packaging, processing, use, distribution, marketing, advertising, labeling, promotion, sale, offer for sale, storage,
import, export or disposal of any product manufactured or distributed by the Company including, without limitation the Federal Food, Drug
and Cosmetic Act (21 U.S.C. §301 et seq.), the Public Health Service Act (42 U.S.C. §201 et seq.), the federal Anti-Kickback Statute (42
U.S.C. §1320a-7b(b)), the civil False Claims Act (31 U.S.C. §3729 et seq.), the administrative False Claims Law (42 U.S.C. §1320a-7b(a)),
the federal Physician Payment Sunshine Act (42 U.S.C. §1320a-7h), the Civil Monetary Penalties Law (42 U.S.C. §1320a-7a), the exclusion
laws (42 U.S.C. §1320a-7), all criminal laws relating to health care fraud and abuse, including, but not limited to, 18 U.S.C. §286-287, the
criminal  health  care  fraud  provisions  of  the  Health  Insurance  Portability  and  Accountability  Act  of  1996  (18  U.S.C.  §1035  and  1347)
(“HIPAA”), Medicare (Title XVIII of the Social Security Act), Medicaid (Title XIX of the Social Security Act), HIPAA, as amended by the
Health Information Technology for Economic and Clinical Health Act of 2009, and the Patient Protection and Affordable Care Act of 2010,
as amended by the Health Care and Education Affordability Reconciliation

13

Act  of  2010,  the  regulations  promulgated  pursuant  to  such  laws,  and  any  successor  government  programs  and  comparable  state  laws,
regulations relating to Good Clinical Practices and Good Laboratory Practices, collection and reporting requirements and the processing of
any applicable rebate, chargeback or adjustment, under applicable rules and regulations relating to the Medicaid Drug Rebate Program (42
U.S.C. §1396r-8), any state supplemental rebate program, Medicare average sales price reporting (42 U.S.C. §1395w-3a), the Public Health
Service Act (42 U.S.C. §256b), the VA Federal Supply Schedule (38 U.S.C. §8126) or under any state pharmaceutical assistance program or
U.S.  Department  of  Veterans  Affairs  agreement,  and  any  successor  government  programs,  and  all  other  local,  state,  federal,  national,
supranational  and  foreign  laws,  manual  provisions,  policies  and  administrative  guidance  relating  to  the  regulation  of  the  Company
(collectively, the “Applicable Laws”), except where such noncompliance would not, individually or in the aggregate, have a Material Adverse
Effect; (ii) have not received any written notice from any court or arbitrator or governmental or regulatory authority or third party alleging or
asserting noncompliance with any Applicable Laws or any Permits and supplements or amendments thereto required by any such Applicable
Laws (“Authorizations”); (iii) possess all Authorizations and such Authorizations are valid and in full force and effect and are not in violation
of any term of any such Authorizations; (iv) have not received written notice of any claim, action, suit, proceeding, hearing, enforcement,
investigation arbitration or other action from any court or arbitrator or governmental or regulatory authority or third party alleging that any
product operation or activity is in violation of any Applicable Laws or Authorizations nor is any such claim, action, suit, proceeding, hearing,
enforcement,  investigation,  arbitration  or  other  action  threatened;  (v)  have  not  received  any  written  or,  to  the  Company’s  knowledge,  oral
notice that any court or arbitrator or governmental or regulatory authority has taken, is taking or intends to take, action to limit, suspend,
materially modify or revoke any Authorizations nor is any such limitation, suspension, modification or revocation threatened; (vi) have filed,
obtained, maintained or submitted all material reports, documents, forms, notices, applications, records, claims, submissions and supplements
or  amendments  as  required  by  any  Applicable  Laws  or  Authorizations  and  that  all  such  reports,  documents,  forms,  notices,  applications,
records, claims, submissions and supplements or amendments were complete and accurate in all material respects on the date filed (or were
corrected or supplemented by a subsequent submission); and (vii) are not a party to and have no ongoing reporting obligations pursuant to
any corporate integrity agreements, monitoring agreements, consent decrees, settlement orders or similar agreements with or imposed by any
governmental  or  regulatory  authority.  Neither  the  Company,  any  of  its  Subsidiaries  nor  any  of  its  or  their  respective  officers,  directors,
employees or, to the Company’s knowledge of the Company, agents, has been excluded, suspended or debarred from or otherwise ineligible
for  participation  in  any  U.S.  federal  health  care  program  or  human  clinical  research  or,  to  the  knowledge  of  the  Company,  is  subject  to  a
governmental inquiry, investigation, proceeding or other similar action that could reasonably be expected to result in debarment, suspension,
ineligibility or exclusion.

(qq)    Absence of Settlement Agreements or Undertakings. Except as disclosed in the SEC Reports, the Company is not a
party  to  any  corporate  integrity  agreements,  monitoring  agreements,  consent  decrees,  settlement  orders,  or  similar  agreements  with  or
imposed by any governmental authority.

(rr)    Material Contracts. There are no contracts or other documents required to be described in the SEC Reports or filed as
exhibits to the SEC Reports pursuant to Item 601 of Regulation S-K that are not described and filed as required. The statements made in the
SEC Reports, insofar as they purport to constitute summaries of the terms of the contracts and other documents described and filed pursuant
to Item 601 of Regulation S-K, constitute accurate summaries of the terms of such contracts and documents in all material respects. Except as
disclosed in the SEC Reports, neither the Company nor any of its Subsidiaries has knowledge that any other party to any such contract or
other document filed pursuant to Item 601 of Regulation S-K has any intention not to render full performance as contemplated by the terms
thereof.

(ss)        Disclosure  Controls.  The  Company  and  each  of  its  Subsidiaries  maintain  disclosure  controls  and  procedures  (as
defined in Rule 13a-15(e) under the Exchange Act) designed to ensure that the information required to be disclosed by the Company and its
Subsidiaries in the reports they file or submit under the Exchange Act is accumulated and communicated to management of the Company and
its  Subsidiaries,  including  their  respective  principal  executive  officers  and  principal  financial  officers,  as  appropriate,  to  allow  timely
decisions  regarding  required  disclosure  to  be  made,  and  such  disclosure  controls  and  procedures  are  effective  in  all  material  respects  to
perform the functions for which they were established.

production or manufacture of critical technologies within the meaning of

(tt)        Defense  Production  Act  of  1950.  The  Company  does  not  engage  in  the  design,  fabrication,  development,  testing,

14

the Defense Production Act of 1950, as amended, including all implementing regulations thereof and has no current intention of engaging in
such activities in the future.

(uu)        No “Bad Actor” Disqualification.  The  Company  has  exercised  reasonable  care,  in  accordance  with  SEC  rules  and
guidance,  to  determine  whether  any  Covered  Person  (as  defined  below)  is  subject  to  any  of  the  “bad  actor”  disqualifications  described  in
Rule 506(d)(1)(i) through (viii) under the Securities Act (“Disqualification Events”).  To  the  Company’s  knowledge,  no  Covered  Person  is
subject to a Disqualification Event, except for a Disqualification Event covered by Rule 506(d)(2) or (d)(3) under the Securities Act. The
Company  has  complied,  to  the  extent  applicable,  with  any  disclosure  obligations  under  Rule  506(e)  under  the  Securities  Act.  “Covered
Persons” are those persons specified in Rule 506(d)(1) under the Securities Act, including the Company; any predecessor or affiliate of the
Company; any director, executive officer, other officer participating in the offering, general partner or managing member of the Company;
any beneficial owner of 20% or more of the Company’s outstanding voting equity securities, calculated on the basis of voting power; any
promoter (as defined in Rule 405 under the Securities Act) connected with the Company in any capacity at the time of the sale of the Shares;
and any person that has been or will be paid (directly or indirectly) remuneration for solicitation of purchasers in connection with the sale of
the  Shares  (a  “Solicitor”),  any  general  partner  or  managing  member  of  any  Solicitor,  and  any  director,  executive  officer  or  other  officer
participating in the offering of any Solicitor or general partner or managing member of any Solicitor.

3.2    Representations and Warranties of the Purchaser. The Purchaser hereby represents and warrants as of the date hereof and as of

the Closing Date to the Company as follows:

(a)    Organization; Authority. The Purchaser is an entity duly organized, validly existing and in good standing under the laws
of the jurisdiction of its organization with the requisite corporate, limited liability company or partnership power and authority to enter into
and to consummate the transactions contemplated hereby and otherwise to carry out its obligations hereunder and thereunder. The execution
and delivery of this Agreement by the Purchaser and performance by the Purchaser of the transactions contemplated by this Agreement have
been duly authorized by all necessary corporate or, if the Purchaser is not a corporation, such partnership, limited liability company or other
applicable  like  action,  on  the  part  of  the  Purchaser.  This  Agreement  has  been  duly  executed  by  the  Purchaser,  and  when  delivered  by  the
Purchaser in accordance with the terms hereof, will constitute the valid and legally binding obligation of the Purchaser, enforceable against it
in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium,
liquidation  or  similar  laws  relating  to,  or  affecting  generally  the  enforcement  of,  creditors’  rights  and  remedies  or  by  other  equitable
principles of general application.

(b)    No Conflicts. The execution, delivery and performance by the Purchaser of this Agreement and the consummation by
the Purchaser of the transactions contemplated hereby and thereby will not (i) result in a violation of the organizational documents of the
Purchaser, (ii) conflict with, or constitute a default (or an event which with notice or lapse of time or both would become a default) under, or
give  to  others  any  rights  of  termination,  amendment,  acceleration  or  cancellation  of,  any  agreement,  indenture  or  instrument  to  which  the
Purchaser is a party, or (iii) result in a violation of any law, rule, regulation, order, judgment or decree (including federal and state securities
laws)  applicable  to  the  Purchaser,  except  in  the  case  of  clauses  (ii)  and  (iii)  above,  for  such  conflicts,  defaults,  rights  or  violations  which
would  not,  individually  or  in  the  aggregate,  reasonably  be  expected  to  have  a  material  adverse  effect  on  the  ability  of  the  Purchaser  to
perform its obligations hereunder.

(c)    Investment Intent. The Purchaser understands that the Shares are “restricted securities” and have not been registered
under the Securities Act or any applicable state securities law and that Purchaser is acquiring the Shares as principal for its own account and
not with a view to, or for distributing or reselling such Shares or any part thereof in violation of the Securities Act or any applicable state
securities laws, provided, however, that by making the representations, warranties and covenants of the Purchaser in this Agreement, except
as set forth in Section 4.1(b), the Purchaser is not agreeing to hold any of the Shares for any minimum period of time and may, subject to the
provisions of this Agreement, sell or otherwise dispose of all or any part of the Shares pursuant to an effective registration statement under
the  Securities  Act  or  under  an  exemption  from  such  registration  and  in  compliance  with  applicable  federal  and  state  securities  laws.  The
Purchaser is acquiring the Shares hereunder in the ordinary course of its business. The Purchaser does not presently have any agreement, plan
or understanding, directly or indirectly, with any

15

Person to distribute or effect any distribution of any of the Shares (or any securities which are derivatives thereof) to or through any person or
entity; the Purchaser is not a registered broker-dealer under Section 15 of the Exchange Act or an entity engaged in a business that would
require it to be so registered as a broker-dealer.

investor” as defined in Rule 501(a) under the Securities Act.

(d)    Purchaser Status. At the time the Purchaser was offered the Shares, it was, and at the date hereof it is an “accredited

(e)    General Solicitation. The Purchaser is not purchasing the Shares as a result of any advertisement, article, notice or other
communication  regarding  the  Shares  published  in  any  newspaper,  magazine  or  similar  media  or  broadcast  over  television  or  radio  or
presented at any seminar or any other general advertisement.

(f)        Experience  of  the  Purchaser.  The  Purchaser,  either  alone  or  together  with  its  representatives,  has  such  knowledge,
sophistication  and  experience  in  business  and  financial  matters  so  as  to  be  capable  of  evaluating  the  merits  and  risks  of  the  prospective
investment in the Shares, and has so evaluated the merits and risks of such investment. The Purchaser is able to bear the economic risk of an
investment in the Shares and, at the present time, is able to afford a complete loss of such investment.

(g)    Acknowledgment of Risks.

(i)    The Purchaser acknowledges and understands that its investment in the Shares involves a significant degree of
risk,  including,  without  limitation:  (i)  the  Company  remains  a  development  stage  business  with  limited  operating  history  and  requires
substantial funds in addition to the proceeds from the sale of the Shares; (ii) an investment in the Company is speculative, and only one who
can afford the loss of their entire investment should consider investing in the Company and the Shares; (iii) the Purchaser may not be able to
liquidate its investment; (iv) transferability of the Shares is extremely limited; (v) in the event of a disposition of the Shares, the Purchaser
could sustain the loss of its entire investment; and (vi) the Company has not paid any dividends on its Common Stock since inception and
does not anticipate the payment of dividends in the foreseeable future. Such risks are more fully set forth in the public filings made by the
Company with the Commission;

(ii)        The  Purchaser  is  able  to  bear  the  economic  risk  of  holding  the  Shares  for  an  indefinite  period,  and  has
knowledge and experience in financial and business matters such that it is capable of evaluating the risks of the investment in the Shares; and

(iii)        The  Purchaser  has,  in  connection  with  the  Purchaser’s  decision  to  purchase  Shares,  not  relied  upon  any
representations or other information (whether oral or written) other than as set forth in the representations and warranties of the Company
contained herein, and the Purchaser has, with respect to all matters relating to this Agreement and the offer and sale of the Shares, relied
solely upon the advice of the Purchaser’s own counsel and has not relied upon or consulted any counsel to the Company.

(h)    Access to Information. The Purchaser acknowledges that it has had the opportunity to review the SEC Reports and has
been afforded (i) the opportunity to ask such questions as it has deemed necessary of, and to receive answers from, representatives of the
Company concerning the terms and conditions of the offering of the Shares and the merits and risks of investing in the Shares; (ii) access to
information  about  the  Company  and  the  Subsidiaries  and  their  respective  financial  condition,  results  of  operations,  business,  properties,
management and prospects sufficient to enable it to evaluate its investment; and (iii) the opportunity to obtain such additional information
that the Company possesses or can acquire without unreasonable effort or expense that is necessary to make an informed investment decision
with  respect  to  the  investment.  Neither  such  inquiries  nor  any  other  investigation  conducted  by  or  on  behalf  of  the  Purchaser  or  its
representatives  or  counsel  shall  modify,  amend  or  affect  the  Purchaser’s  right  to  rely  on  the  truth,  accuracy  and  completeness  of  the  SEC
Reports and the Company’s representations and warranties contained in this Agreement. The Purchaser has sought such accounting, legal and
tax advice as it has considered necessary to make an informed decision with respect to its acquisition of the Shares.

Purchaser was first contacted by the Company or any other Person regarding

(i)        Certain  Trading  Activities.  Other  than  with  respect  to  the  transactions  contemplated  herein,  since  the  time  that  the

16

the transactions contemplated hereby, neither the Purchaser nor any Affiliate of the Purchaser which (x) had knowledge of the transactions
contemplated hereby, (y) has or shares discretion relating to the Purchaser’s investments or trading or information concerning the Purchaser’s
investments, including in respect of the Shares, and (z) is subject to the Purchaser’s review or input concerning such Affiliate’s investments
or trading (each a “Trading Affiliate”) has directly or indirectly, nor has any Person acting on behalf of or pursuant to any understanding with
the Purchaser or Trading Affiliate, effected or agreed to effect any purchases or sales of the securities of the Company (including, without
limitation, any Short Sales involving the Company’s securities). The Purchaser has maintained the confidentiality of all disclosures made to it
in connection with this transaction (including the existence and terms of this transaction).

(j)    Brokers and Finders. No Person will have, as a result of the transactions contemplated by this Agreement, any valid
right,  interest  or  claim  against  or  upon  the  Company  or  the  Purchaser  for  any  commission,  fee  or  other  compensation  pursuant  to  any
agreement, arrangement or understanding entered into by or on behalf of the Purchaser.

(k)        Independent  Investment  Decision.  The  Purchaser  has  independently  evaluated  the  merits  of  its  decision  to  purchase
Shares pursuant hereto, and the Purchaser confirms that it has not relied on the advice of any other Purchaser’s business and/or legal counsel
in making such decision. The Purchaser understands that nothing in this Agreement or any other materials presented by or on behalf of the
Company  to  the  Purchaser  in  connection  with  the  purchase  of  the  Shares  constitutes  legal,  tax  or  investment  advice.  The  Purchaser  has
consulted  such  legal,  tax  and  investment  advisors  as  it,  in  its  sole  discretion,  has  deemed  necessary  or  appropriate  in  connection  with  its
purchase of the Shares.

(l)    Reliance on Exemptions. The Purchaser understands that the Shares being offered and sold to it in reliance on specific
exemptions from the registration requirements of United States federal and state securities laws and that the Company is relying in part upon
the  truth  and  accuracy  of,  and  the  Purchaser’s  compliance  with,  the  representations,  warranties,  agreements,  acknowledgements  and
understandings of the Purchaser set forth herein in order to determine the availability of such exemptions and the eligibility of the Purchaser
to acquire the Shares.

(m)        No  Governmental  Review.  The  Purchaser  understands  that  no  United  States  federal  or  state  agency  or  any  other
government or governmental agency has passed on or made any recommendation or endorsement of the Shares or the fairness or suitability
of the investment in the Shares nor have such authorities passed upon or endorsed the merits of the offering of the Shares.

apply to sales of Common Stock and other activities with respect to the Common Stock by the Purchaser.

(n)    Regulation M. The Purchaser is aware that the anti-manipulation rules of Regulation M under the Exchange Act may

(o)        Beneficial Ownership.  The  purchase  of  the  Shares  by  the  Purchaser  at  the  Closing  will  not  result  in  the  Purchaser
(individually or together with any other Person with whom the Purchaser has identified, or will have identified, itself as part of a “group” in a
public filing made with the Commission involving the Company’s securities) (when added to any other securities of the Company that it or
they  then  own  or  have  the  right  to  acquire)  acquiring,  or  obtaining  the  right  to  acquire,  in  excess  of  the  Threshold  Amount  on  a  post
transaction  basis  that  assumes  that  such  Closing  shall  have  occurred.  The  Purchaser  does  not  presently  intend  to,  alone  or  together  with
others,  make  a  public  filing  with  the  Commission  to  disclose  that  it  has  (or  that  it  together  with  such  other  Persons  have)  acquired,  or
obtained the right to acquire, as a result of such Closing (when added to any other securities of the Company that it or they then own or have
the right to acquire), in excess of the Threshold Amount on a post transaction basis that assumes that each Closing shall have occurred.

Shares was made (if an entity) are located at the address immediately below the Purchaser’s name on its signature page hereto.

(p)    Residency. The Purchaser’s residence (if an individual) or offices in which its investment decision with respect to the

(q)    Anti-Money Laundering Laws. The Purchaser represents and warrants to, and covenants with, the Company that: (i) the
Purchaser is in compliance with the regulations administered by the U.S. Department of the Treasury (“Treasury”) Office of Foreign Assets
Control; (ii) the Purchaser, its

17

parents,  subsidiaries,  affiliated  companies,  officers,  directors  and  partners,  and  to  the  Purchaser’s  knowledge,  its  stockholders,  owners,
employees, and agents, are not on the List of Specially Designated Nationals and Blocked Persons maintained by Treasury and have not been
designated by Treasury as a financial institution of primary money laundering concern subject to special measures under Section 311 of the
USA  PATRIOT  Act,  Pub.  L.  107-56;  (iii)  to  the  Purchaser’s  knowledge,  the  funds  to  be  used  to  acquire  the  Shares  are  not  derived  from
activities that contravene applicable anti-money laundering laws and regulations; (iv) the Purchaser is in compliance with all other applicable
anti money laundering laws and regulations and has implemented anti money laundering procedures that comply with applicable anti-money
laundering laws and regulations, including, as applicable, the requirements of the Bank Secrecy Act, as amended by the USA PATRIOT Act,
Pub. L. 107 56; and (v) to the best of its knowledge (A) none of the funds to be provided by the Purchaser are being tendered on behalf of a
person or entity who has not been identified to the Purchaser, and (B) upon the reasonable request of the Company, the Purchaser agrees to
re-certify in writing the representations, warranties and covenants provided in this paragraph.

(r)        No  “Bad  Actor”  Disqualification  Events.  Neither  (i)  the  Purchaser,  (ii)  any  of  its  directors,  executive  officers,  other
officers  that  may  serve  as  a  director  or  officer  of  any  company  in  which  it  invests,  general  partners  or  managing  members,  nor  (iii)  any
beneficial owner of the Company’s voting equity securities (in accordance with Rule 506(d) of the Securities Act) held by the Purchaser is
subject to any Disqualification Event, except for Disqualification Events covered by Rule 506(d)(2)(ii) or (iii) or (d)(3) under the Securities
Act and disclosed reasonably in advance of the Closing in writing in reasonable detail to the Company.

(s)        Representations  by  Non-United  States  Persons.  If  Purchaser  is  not  a  United  States  person,  the  Purchaser  hereby
represents  that  the  Purchaser  has  satisfied  the  laws  of  the  Purchaser’s  jurisdiction  in  connection  with  any  invitation  to  subscribe  for  the
Shares or any use of this Agreement, including (i) the legal requirements within the Purchaser’s jurisdiction for the purchase of the Shares,
(ii) any foreign exchange restrictions applicable to such purchase, (iii) any governmental or other consents that may need to be obtained and
(iv)  the  income  tax  and  other  tax  consequences,  if  any,  that  may  be  relevant  to  the  purchase,  holding,  redemption,  sale  or  transfer  of  the
Shares. The Purchaser’s subscription and payment for, and the Purchaser’s continued beneficial ownership of, the Shares will not violate any
applicable securities or other laws of the Purchaser’s jurisdiction.

The Company and the Purchaser each acknowledge and agree that no party to this Agreement has made or makes any representations

or warranties with respect to the transactions contemplated hereby other than those specifically set forth in this Article III.

4.1    Transfer Restrictions.

ARTICLE IV.
OTHER AGREEMENTS OF THE PARTIES

(a)    Compliance with Laws. Notwithstanding any other provision of this Article IV, the Purchaser covenants that the Shares
may be disposed of only pursuant to an effective registration statement under, and in compliance with the requirements of, the Securities Act,
or  pursuant  to  an  available  exemption  from,  or  in  a  transaction  not  subject  to,  the  registration  requirements  of  the  Securities  Act,  and  in
compliance with any applicable state and federal securities laws. In connection with any transfer of the Shares other than (i) pursuant to an
effective  registration  statement,  (ii)  to  the  Company,  (iii)  pursuant  to  Rule  144  (provided  that  the  Purchaser  provides  the  Company  with
reasonable assurances (in the form of seller and, if applicable, broker representation letters) that the securities may be sold pursuant to such
rule)  or  (iv)  in  connection  with  a  bona  fide  pledge  as  contemplated  in  Section  4.1(d),  the  Company  may  require  the  transferor  thereof  to
provide to the Company an opinion of counsel selected by the transferor and reasonably acceptable to the Company, the form and substance
of  which  opinion  shall  be  reasonably  satisfactory  to  the  Company,  to  the  effect  that  such  transfer  does  not  require  registration  of  such
transferred  Shares  under  the  Securities  Act  or  applicable  state  securities  law.  As  a  condition  of  transfer  (other  than  a  transfer  pursuant  to
clauses (i), (ii), (iii) or (iv) above and otherwise made in compliance with the terms of this Agreement), any such transferee shall agree in
writing  to  be  bound  by  the  terms  of  this  Agreement  and  shall  have  the  rights  and  obligations  of  a  Purchaser  under  this  Agreement  with
respect to such transferred Shares.

18

(b)    Restricted Period. During the period beginning from the date of this Agreement and continuing to and including the
date  six  months  after  the  date  of  this  Agreement  (the  “Restricted  Period”),  the  Purchaser  shall  not,  and  shall  cause  its  Affiliates  not  to,
without the prior consent of the Company, directly or indirectly, transfer (i) the Shares, (ii) any securities issued in respect of the Shares as a
result of any stock split, stock dividend, share exchange, merger, consolidation or similar recapitalization, or (iii) any securities issued as (or
issuable  upon  the  exercise  of  any  warrant,  right  or  other  security  that  is  issued  as)  a  dividend  or  other  distribution  with  respect  to,  or  in
exchange or in replacement of, the Shares. Notwithstanding the foregoing, this Section 4.1(b) shall not apply to (i) the transfer of the Shares
to Affiliates of the Purchaser, (ii) the transfer of the Shares pursuant to a bona fide third party tender offer, merger, consolidation or other
similar transaction that is approved by the Board of Directors of the Company, made to all holders of Common Stock involving a Change of
Control (as defined below), provided that in the event that the tender offer, merger, consolidation or other such transaction is not completed,
the Common Stock owned by the Purchaser shall remain subject to the restrictions contained in this Agreement or (iii) the pledge of, or grant
of a security interest in, the Shares in connection with any loan or financing arrangement secured by all or substantially all of Purchaser’s
assets, including, without limitation, Purchaser’s existing credit agreement. For purposes of this Section 4.1(b), “Change of Control” shall
mean  the  transfer  (whether  by  tender  offer,  merger,  consolidation  or  other  similar  transaction),  in  one  transaction  or  a  series  of  related
transactions, to a person or group of affiliated persons, of the Company’s voting securities if, after such transfer, such person or group of
affiliated persons would hold more than 50% of the outstanding voting securities of the Company (or the surviving entity).

(c)    Sale Volume Limitation. Following the expiration of the Restricted Period, without the prior approval of the Company,
the Purchaser shall not offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant
any option, right or warrant for the sale or, or otherwise dispose of or transfer during any calendar month greater than twenty percent (20.0%)
of the aggregate number of Shares held by the Purchaser or its Affiliates as of the last day of the Restricted Period.

and a restrictive legend in substantially the following form, until such time as they are not required under Section 4.1(e):

(d)    Legends. Any certificates or book-entry notations shall bear any legend as required by the “blue sky” laws of any state

THE OFFER AND SALE OF THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR ANY APPLICABLE
STATE  SECURITIES  LAWS.  THE  SECURITIES  MAY  NOT  BE  OFFERED  FOR  SALE,  SOLD,
TRANSFERRED, ASSIGNED OR OTHERWISE DISPOSED OF (I) IN THE ABSENCE OF (A) AN
EFFECTIVE  REGISTRATION  STATEMENT  FOR  THE  SECURITIES  UNDER  THE  SECURITIES
ACT OR (B) AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO,
THE  REGISTRATION  REQUIREMENTS  OF  THE  SECURITIES  ACT  AND  IN  EACH  CASE  IN
ACCORDANCE  WITH  APPLICABLE  STATE  SECURITIES  LAWS  OR  BLUE  SKY  LAWS  AS
EVIDENCED  BY  A  LEGAL  OPINION  OF  COUNSEL  REASONABLY  SATISFACTORY  TO  THE
COMPANY  AND  ITS  TRANSFER  AGENT  OR  (II)  UNLESS  SOLD  PURSUANT  TO  RULE  144
UNDER  THE  SECURITIES  ACT.  NOTWITHSTANDING  THE  FOREGOING,  THE  SECURITIES
MAY  BE  PLEDGED  IN  CONNECTION  WITH  A  LOAN  OR  FINANCING  ARRANGEMENT
SECURED BY ALL OR SUBSTANTIALLY ALL OF THE HOLDER’S ASSETS; PROVIDED THAT
IN  CONNECTION  WITH  ANY  FORECLOSURE  OR  TRANSFER  OF  THE  SECURITIES,  THE
TRANSFEROR  SHALL  COMPLY  WITH  THE  PROVISIONS  HEREIN  AND  IN  THE  STOCK
PURCHASE AGREEMENT, AND UPON FORECLOSURE OR TRANSFER OF THE SECURITIES,
SUCH  FORECLOSING  PERSON  OR  TRANSFEREE  SHALL  COMPLY  WITH  ALL  PROVISIONS
CONTAINED HEREIN AND IN THE STOCK PURCHASE AGREEMENT.

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The Company acknowledges and agrees that Purchaser may from time to time pledge, and/or grant a security interest in, some or all
of  the  legended  Shares  in  accordance  with  applicable  securities  laws,  pursuant  to  a  loan  or  financing  arrangement  secured  by  all  or
substantially  all  of  Purchaser’s  assets,  including,  without  limitation,  Purchaser’s  existing  credit  agreement.  Such  a  pledge  would  not  be
subject  to  approval  or  consent  of  the  Company  and  no  legal  opinion  of  legal  counsel  to  the  pledgee,  secured  party  or  pledgor  shall  be
required  in  connection  with  the  pledge,  but  such  legal  opinion  shall  be  required  in  connection  with  a  subsequent  transfer  or  foreclosure
following  default  by  the  Purchaser  of  the  pledge.  No  notice  shall  be  required  of  such  pledge,  but  Purchaser  shall  promptly  notify  the
Company of any such subsequent transfer or foreclosure. The Purchaser acknowledges that the Company shall not be responsible for any
pledges relating to, or the grant of any security interest in, any of the Shares or for any agreement, understanding or arrangement between the
Purchaser and its pledgee or secured party. At the Purchaser’s expense, the Company will execute and deliver such reasonable documentation
as the Purchaser may reasonably request in connection with a pledge or transfer of the Shares. The Purchaser acknowledges and agrees that,
except as otherwise provided in Section 4.1(e), any Shares subject to a pledge or security interest as contemplated by this Section 4.1(d) shall
continue to bear the legend set forth in this Section 4.1(d) and be subject to the restrictions on transfer set forth in Section 4.1.

(e)    Removal of Legends.

(i)    The Company agrees that at such time as any legend is no longer required under this Article IV, it will, no later
than two (2) Business Days following the delivery by the Purchaser to the Company or the Company’s transfer agent of a request to remove
such  legend,  together  with  such  representations  and  covenants  of  the  Purchaser  or  the  Purchaser’s  executing  broker  as  the  Company  may
reasonably require in connection therewith, deliver or cause to be delivered to the Purchaser a book entry position representing such shares
that is free from any such legend. The Company shall not make any notation on its records or give instructions to any transfer agent of the
Company that enlarge the restrictions on transfer set forth in this Article IV. Any certificates for Shares subject to legend removal shall be
transmitted  by  the  transfer  agent  of  the  Company  to  the  Purchaser  by  crediting  the  account  of  the  Purchaser’s  prime  broker  with  the
Depository Trust Company (“DTC”). All costs and expenses related to the removal of the legends and the reissuance of any Shares shall be
borne by the Company.

(ii)        The  restrictive  legend  set  forth  in  Section  4.1(d)  above  shall  be  removed  and  the  Company  shall  issue  a
certificate or book entry position without such restrictive legend or any other restrictive legend to the holder of the applicable shares upon
which  it  is  stamped  or  issue  to  such  holder  by  electronic  delivery  with  the  applicable  balance  account  at  DTC  or  in  physical  certificated
shares, if appropriate, if (i) such Shares are sold or transferred pursuant to Rule 144 (if the transferor is not an affiliate of the Company); or
(ii)  such  Shares  are  eligible  for  sale  without  the  requirement  for  the  Company  to  be  in  compliance  with  the  current  public  information
required under Rule 144 as to such securities and without volume or manner-of-sale restrictions. Subject to receipt of such representations,
and covenants as are contemplated hereby, at such time as Rule 144 becomes available for the resale of the Shares, without the requirement
for the Company to be in compliance with the current public information required under Rule 144 as to the Shares and without volume or
manner-of-sale  restrictions,  the  Company  shall  issue  to  the  Company’s  transfer  agent  the  instructions  with  respect  to  legend  removal
consistent with this Article IV. Any fees (with respect to the transfer agent, the Company’s counsel or otherwise) associated with the issuance
of such opinion or the removal of such legend shall be borne by the Company.

(f)    Acknowledgement. The Purchaser acknowledges its primary responsibilities under the Securities Act and accordingly
will not sell or otherwise transfer the Shares or any interest therein without complying with the requirements of the Securities Act. Both the
Company  and  its  Transfer  Agent,  and  their  respective  directors,  officers,  employees  and  agents,  may  rely  on  this  Section  4.1(f)  and  the
Purchaser will indemnify and hold harmless each of such persons from any breaches or violations of this Section 4.1(f).

4.2    Furnishing of Information. In order to enable the Purchaser to sell the Shares under Rule 144, for a period of eighteen (18)
months from the Closing, the Company shall use its commercially reasonable efforts to timely file (or obtain extensions in respect thereof
and file within the applicable grace period) all reports required to be filed by the Company after the date hereof pursuant to the Exchange
Act. During such eighteen (18) month period, if the Company is not required to file reports pursuant to the

20

Exchange Act, it will prepare and furnish to the Purchaser and make publicly available in accordance with Rule 144(c) such information as is
required for the Purchaser to sell the Shares under Rule 144.

4.3        Integration.  The  Company  shall  not,  and  shall  use  its  commercially  reasonable  efforts  to  ensure  that  no  Affiliate  of  the
Company shall, sell, offer for sale or solicit offers to buy or otherwise negotiate in respect of any security (as defined in Section 2 of the
Securities Act) that will be integrated with the offer or sale of the Shares in a manner that would require the registration under the Securities
Act of the sale of the Shares to the Purchaser, or that will be integrated with the offer or sale of the Shares for purposes of the rules and
regulations  of  any  Trading  Market  such  that  it  would  require  stockholder  approval  prior  to  the  closing  of  such  other  transaction  unless
stockholder approval is obtained before the closing of such subsequent transaction.

4.4    Stockholder Rights Plan. No claim will be made or enforced by the Company or, with the consent of the Company, any other
Person, that the Purchaser is an “Acquiring Person”  under  any  control  share  acquisition,  business  combination,  poison  pill  (including  any
distribution under a rights agreement) or similar anti-takeover plan or arrangement in effect or hereafter adopted by the Company, or that the
Purchaser  could  be  deemed  to  trigger  the  provisions  of  any  such  plan  or  arrangement,  in  either  case  solely  by  virtue  of  receiving  Shares
hereunder or under any other written agreement between the Company and the Purchaser; provided, however, that the Purchaser does not
own any equity in the Company prior to its purchase of the Shares hereunder.

4.5        Non-Public  Information.  Except  with  respect  to  the  material  terms  and  conditions  of  the  transactions  contemplated  by  the
License and Collaboration Agreement and this Agreement and the performance by the parties of their obligations thereunder, or as expressly
required by any applicable securities law, the Company covenants and agrees that neither it, nor any other Person acting on its behalf, will
provide the Purchaser or its agents or counsel with any information regarding the Company that the Company believes constitutes material
non-public information regarding the Company or its Subsidiaries without the express written consent of the Purchaser, unless prior thereto
the Purchaser shall have executed a written agreement regarding the confidentiality and use of such information. The Company understands
and confirms that the Purchaser shall be relying on the foregoing covenant in effecting transactions in securities of the Company.

4.6    Use of Proceeds. The Company shall use the net proceeds from the sale of the Shares hereunder for working capital and general

corporate purposes and shall not use such proceeds for the redemption of any Common Stock or Common Stock Equivalents.

4.7    Indemnification. Subject to the provisions of this Section 4.7, the Company will indemnify and hold Purchaser and its directors,
officers,  stockholders,  members,  partners,  employees  and  agents  (and  any  other  Persons  with  a  functionally  equivalent  role  of  a  Person
holding such titles notwithstanding a lack of such title or any other title), each Person who controls Purchaser (within the meaning of Section
15  of  the  Securities  Act  and  Section  20  of  the  Exchange  Act),  and  the  directors,  officers,  stockholders,  agents,  members,  partners  or
employees (and any other Persons with a functionally equivalent role of a Person holding such titles notwithstanding a lack of such title or
any  other  title)  of  such  controlling  persons  (each,  a  “Purchaser  Party”)  harmless  from  any  and  all  losses,  liabilities,  obligations,  claims,
contingencies, damages, costs and expenses, including all judgments, amounts paid in settlements, court costs and reasonable attorneys’ fees
and  costs  of  investigation  that  any  such  Purchaser  Party  may  suffer  or  incur  as  a  result  of  or  relating  to  (a)  any  breach  of  any  of  the
representations, warranties, covenants or agreements made by the Company in this Agreement or (b) any action instituted against Purchaser
in any capacity, or its respective Affiliates, by any stockholder of the Company who is not an Affiliate of Purchaser, with respect to any of the
transactions  contemplated  by  this  Agreement  (unless  such  action  is  based  upon  a  breach  of  Purchaser’s  representations,  warranties  or
covenants under this Agreement or any agreements or understandings Purchaser may have with any such stockholder or any violations by the
Purchaser of state or federal securities laws or any conduct by the Purchaser which constitutes fraud, gross negligence, willful misconduct,
bad  faith  or  malfeasance).  Promptly  after  receipt  by  any  Purchaser  Party  (the  “Indemnified  Person”)  of  notice  of  any  demand,  claim  or
circumstances which could reasonably be expected to give rise to a claim or the commencement of any action, proceeding or investigation in
respect  of  which  indemnity  may  be  sought  pursuant  to  this  Section  4.7,  such  Indemnified  Person  shall  promptly  notify  the  Company  in
writing and the Company shall assume the defense thereof, including the employment of counsel reasonably satisfactory to such Indemnified
Person, and shall assume the payment of all fees and expenses; provided,

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however,  that  the  failure  of  any  Indemnified  Person  so  to  notify  the  Company  shall  not  relieve  the  Company  of  its  obligations  hereunder
except to the extent that the Company is actually and materially prejudiced by such failure to notify. In any such proceeding, any Indemnified
Person shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such Indemnified
Person unless: (i) the Company and the Indemnified Person shall have mutually agreed to the retention of such counsel; (ii) the Company
shall  have  failed  promptly  to  assume  the  defense  of  such  proceeding  and  to  employ  counsel  reasonably  satisfactory  to  such  Indemnified
Person in such proceeding; or (iii) in the reasonable judgment of counsel to such Indemnified Person, representation of both parties by the
same counsel would be inappropriate due to actual or potential differing interests between them; provided, however, that the Company shall
not be responsible for the fees and expenses of more than one counsel for all Indemnified Persons. The Company shall not be liable for any
settlement of any action, claim or proceeding effected without its prior written consent, which consent shall not be unreasonably withheld,
delayed  or  conditioned.  Without  the  prior  written  consent  of  the  Indemnified  Person,  which  consent  shall  not  be  unreasonably  withheld,
delayed  or  conditioned,  the  Company  shall  not  effect  any  settlement  of  any  pending  or  threatened  proceeding  in  respect  of  which  any
Indemnified Person is or could have been a party and indemnity could have been sought hereunder by such Indemnified Party, unless such
settlement includes an unconditional release of such Indemnified Person from all liability arising out of such proceeding.

4.8    Principal Trading Market Listing. In the time and manner required by the Principal Trading Market, the Company shall prepare
and file with such Principal Trading Market an additional shares listing application covering all of the Shares and shall use its commercially
reasonable efforts to take all steps necessary to cause all of the Shares to be approved for listing on the Principal Trading Market as promptly
as possible thereafter.

4.9    Blue Sky. The Company, on or before the Closing Date, shall take such action as the Company shall reasonably determine is
necessary in order to obtain an exemption from or to qualify the Shares for sale to the Purchaser under applicable securities or “Blue Sky”
laws of the states of the United States (or to obtain an exemption from such qualification).

4.10        Delivery  of  Shares  After  Closing.  Subject  to  the  satisfaction  of  the  Purchaser’s  obligations  under  this  Agreement,  the
Company shall deliver, or cause to be delivered, a book-entry statement evidencing the Shares within two (2) Trading Days after the Closing
Date.

ARTICLE V.
CONDITIONS PRECEDENT TO CLOSING

5.1    Conditions Precedent to the Obligations of the Purchaser to Purchase Shares. The obligation of the Purchaser to acquire Shares
at the Closing is subject to the fulfillment to the Purchaser’s satisfaction, on or prior to the Closing Date, of each of the following conditions,
any of which may be waived by the Purchaser:

(a)    Representations and Warranties. The representations and warranties of the Company contained herein shall be true and
correct  in  all  material  respects  (except  for  those  representations  and  warranties  which  are  qualified  as  to  materiality  or  Material  Adverse
Effect, in which case such representations and warranties shall be true and correct in all respects) as of the date hereof and as of the Closing
Date, as though made on and as of such date, except for such representations and warranties that speak as of a specific date.

agreements and conditions required by this Agreement to be performed, satisfied or complied with by it at or prior to the Closing.

(b)    Performance. The Company shall have performed, satisfied and complied in all material respects with all covenants,

(c)        No  Injunction.  No  statute,  rule,  regulation,  executive  order,  decree,  ruling  or  injunction  shall  have  been  enacted,
entered, promulgated or endorsed by any court or governmental authority of competent jurisdiction that prohibits the consummation of any of
the transactions contemplated by this Agreement.

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(d)    Consents. The Company shall have obtained in a timely fashion any and all consents, permits, approvals, registrations
and waivers necessary for consummation of the purchase and sale of the Shares (including all Required Approvals), all of which shall be and
remain so long as necessary in full force and effect.

reasonably be expected to have a Material Adverse Effect.

(e)        Adverse  Changes.  Since  the  date  hereof,  no  event  or  series  of  events  shall  have  occurred  that  has  had  or  would

shall have not received any notice objecting to the listing of the Shares from the Nasdaq Stock Market.

(f)    Listing. The Company shall have made all required submissions to the Nasdaq Stock Market regarding the Shares and

(g)    No Suspensions of Trading in Common Stock. The Common Stock shall not have been suspended, as of the Closing
Date,  by  the  Commission  or  the  Principal  Trading  Market  from  trading  on  the  Principal  Trading  Market  nor  shall  suspension  by  the
Commission or the Principal Trading Market have been threatened, as of the Closing Date, either (A) in writing by the Commission or the
Principal Trading Market or (B) by falling below the minimum listing maintenance requirements of the Principal Trading Market.

Section 2.2(a).

(h)        Company  Deliverables.  The  Company  shall  have  delivered  the  Company  Deliverables  in  accordance  with

(i)    Compliance Certificate. The Company shall have delivered to the Purchaser a certificate, dated as of the Closing Date
and  signed  by  its  Chief  Executive  Officer  or  its  Chief  Financial  Officer,  dated  as  of  the  Closing  Date,  certifying  to  the  fulfillment  of  the
conditions specified in Sections 5.1(a) and (b) in the form attached hereto as Exhibit D.

(j)    Termination. This Agreement shall not have been terminated as to the Purchaser in accordance with Section 6.16 herein.

5.2    Conditions Precedent to the Obligations of the Company to sell the Shares. The Company’s obligation to sell and issue the
Shares at the Closing to the Purchaser is subject to the fulfillment to the satisfaction of the Company on or prior to the Closing Date of the
following conditions, any of which may be waived by the Company:

(a)    Representations and Warranties. The representations and warranties made by the Purchaser contained herein shall be
true and correct in all material respects (except for those representations and warranties which are qualified as to materiality, in which case
such representations and warranties shall be true and correct in all respects) as of the date hereof, and as of the Closing Date as though made
on and as of such date, except for representations and warranties that speak as of a specific date.

(b)    Performance. The Purchaser shall have performed, satisfied and complied in all material respects with all covenants,
agreements and conditions required by this Agreement to be performed, satisfied or complied with by the Purchaser at or prior to the Closing
Date.

(c)        No  Injunction.  No  statute,  rule,  regulation,  executive  order,  decree,  ruling  or  injunction  shall  have  been  enacted,
entered, promulgated or endorsed by any court or governmental authority of competent jurisdiction that prohibits the consummation of any of
the transactions contemplated by this Agreement.

(d)    Consents. The Company shall have obtained in a timely fashion any and all consents, permits, approvals, registrations
and waivers necessary for consummation of the purchase and sale of the Shares (including all Required Approvals), all of which shall be and
remain so long as necessary in full force and effect.

Section 2.2(b).

(e)        Purchaser  Deliverables.  The  Purchaser  shall  have  delivered  its  Purchaser  Deliverables  in  accordance  with

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(f)    Termination.    This Agreement shall not have been terminated in accordance with Section 6.16 herein.

ARTICLE VI.
MISCELLANEOUS

6.1    Fees and Expenses. The Company and the Purchaser shall each pay the fees and expenses of their respective advisers, counsel,
accountants  and  other  experts,  if  any,  and  all  other  expenses  incurred  by  such  party  in  connection  with  the  negotiation,  preparation,
execution, delivery and performance of this Agreement. The Company shall pay all Transfer Agent fees, stamp taxes and other taxes and
duties levied in connection with the sale and issuance of the Shares to the Purchaser.

6.2    Entire Agreement. This Agreement, together with the exhibits and schedules thereto, contains the entire understanding of the
parties with respect to the subject matter hereof and supersede all prior agreements, understandings, discussions and representations, oral or
written, with respect to such matters, which the parties acknowledge have been merged into such documents, exhibits and schedules. At or
after  the  Closing,  and  without  further  consideration,  the  Company  and  the  Purchaser  will  execute  and  deliver  to  the  other  such  further
documents as may be reasonably requested in order to give practical effect to the intention of the parties hereunder.

6.3    Notices. Any and all notices or other communications or deliveries required or permitted to be provided hereunder shall be in
writing and shall be deemed given and effective on the earliest of (a) the date of transmission, if such notice or communication is delivered
via facsimile (provided the sender receives a machine-generated confirmation of successful transmission) at the facsimile number specified in
this Section 6.3 prior to 5:00 P.M., New York City time, on a Trading Day, (b) the next Trading Day after the date of transmission, if such
notice or communication is delivered via facsimile at the facsimile number specified in this Section 6.3 on a day that is not a Trading Day or
later than 5:00 P.M., New York City time, on any Trading Day, (c) the Trading Day following the date of mailing, if sent by U.S. nationally
recognized  overnight  courier  service  with  next  day  delivery  specified,  and  (d)  upon  actual  receipt  by  the  party  to  whom  such  notice  is
required to be given. The address for such notices and communications shall be as follows:

If to the Company:    Alpine Immune Sciences, Inc.

188 East Blaine Street, Suite 200
Seattle, WA 98102
Telephone No.: (206) 788-4545
Facsimile No.: (206) 316-8383 (with a copy emailed to legal@alpineimmunesciences.com, which shall not
constitute notice)
Attention: Chief Financial Officer

With a copy to (which shall not constitute notice):

Wilson Sonsini Goodrich & Rosati, Professional Corporation
701 Fifth Avenue, Suite 5100
Seattle, WA 98104
Telephone No.: (206) 883-2500
Facsimile No.: (206) 883-2699
Attention: Patrick Schultheis, Michael Nordtvedt and Bryan King

If to the Purchaser:    To the address set forth under the Purchaser’s name on the signature page hereof;

or such other address as may be designated in writing hereafter, in the same manner, by such Person.

6.4    Amendments; Waivers; No Additional Consideration. No provision of this Agreement may be waived, modified, supplemented
or amended except in a written instrument signed by the Company and the Purchaser. No waiver of any default with respect to any provision,
condition or requirement of this Agreement shall be deemed to be a continuing waiver in the future or a waiver of any subsequent default or a

24

waiver of any other provision, condition or requirement hereof, nor shall any delay or omission of either party to exercise any right hereunder
in any manner impair the exercise of any such right.

6.5    Construction. The headings herein are for convenience only, do not constitute a part of this Agreement and shall not be deemed
to limit or affect any of the provisions hereof. The language used in this Agreement will be deemed to be the language chosen by the parties
to express their mutual intent, and no rules of strict construction will be applied against any party. This Agreement shall be construed as if
drafted jointly by the parties, and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship
of any provisions of this Agreement.

6.6    Successors and Assigns. The provisions of this Agreement shall inure to the benefit of and be binding upon the parties and their
successors  and  permitted  assigns.  This  Agreement,  or  any  rights  or  obligations  hereunder,  may  not  be  assigned  by  the  Company  or  the
Purchaser without the prior written consent of the other party, provided that the Purchaser may assign its rights hereunder in whole or in part
to any Person to whom the Purchaser assigns or transfers any Shares in compliance with this Agreement and applicable law so long as such
transferee  shall  agree  in  writing  to  be  bound,  with  respect  to  the  transferred  Shares,  by  the  terms  and  conditions  of  this  Agreement;  and
provided  further  that,  for  the  avoidance  of  doubt,  the  foregoing  shall  not  be  construed  to  restrict  or  limit  the  Purchaser’s  ability  to  sell,
transfer or otherwise dispose of the Shares in accordance with the terms of this Agreement.

6.7    No Third-Party Beneficiaries. This Agreement is intended for the benefit of the parties hereto and their respective successors
and permitted assigns and is not for the benefit of, nor may any provision hereof be enforced by, any other Person, except each Purchaser
Party is an intended third-party beneficiary of Section 4.7.

6.8    Governing Law. All questions concerning the construction, validity, enforcement and interpretation of this Agreement shall be
governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of
conflicts of law thereof. Each party agrees that all Proceedings concerning the interpretations, enforcement and defense of the transactions
contemplated  by  this  Agreement  (whether  brought  against  a  party  hereto  or  its  respective  Affiliates,  employees  or  agents)  shall  be
commenced exclusively in the New York Courts. Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the New York
Courts  for  the  adjudication  of  any  dispute  hereunder  or  in  connection  herewith  or  with  any  transaction  contemplated  hereby  or  discussed
herein (including, for the avoidance of doubt, with respect to the enforcement of this Agreement), and hereby irrevocably waives, and agrees
not  to  assert  in  any  Proceeding,  any  claim  that  it  is  not  personally  subject  to  the  jurisdiction  of  any  such  New  York  Court,  or  that  such
Proceeding  has  been  commenced  in  an  improper  or  inconvenient  forum.  Each  party  hereto  hereby  irrevocably  waives  personal  service  of
process and consents to process being served in any such Proceeding by mailing a copy thereof via registered or certified mail or overnight
delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Agreement and agrees that such service
shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any
right  to  serve  process  in  any  manner  permitted  by  law.  EACH  PARTY  HERETO  HEREBY  IRREVOCABLY  WAIVES,  TO  THE
FULLEST  EXTENT  PERMITTED  BY  APPLICABLE  LAW,  ANY  AND  ALL  RIGHT  TO  TRIAL  BY  JURY  IN  ANY  LEGAL
PROCEEDING  ARISING  OUT  OF  OR  RELATING  TO  THIS  AGREEMENT  OR  THE  TRANSACTIONS  CONTEMPLATED
HEREBY.

6.9        Survival.  Subject  to  applicable  statute  of  limitations,  the  representations,  warranties,  agreements  and  covenants  contained

herein shall survive the Closing and the delivery of the Shares.

6.10        Execution.  This  Agreement  may  be  executed  in  two  or  more  counterparts,  all  of  which  when  taken  together  shall  be
considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the
other party, it being understood that both parties need not sign the same counterpart. In the event that any signature is delivered by facsimile
transmission,  or  by  e-mail  delivery  of  a  “.pdf”  format  data  file,  such  signature  shall  create  a  valid  and  binding  obligation  of  the  party
executing (or on whose behalf such signature is executed) with the same force and effect as if such facsimile signature page were an original
thereof.

6.11        Severability.  If  any  provision  of  this  Agreement  is  held  to  be  invalid  or  unenforceable  in  any  respect,  the  validity  and

enforceability of the remaining terms and provisions of this Agreement shall not in

25

any  way  be  affected  or  impaired  thereby  and  the  parties  will  attempt  to  agree  upon  a  valid  and  enforceable  provision  that  is  a  reasonable
substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Agreement.

6.12        Rescission  and  Withdrawal  Right.  Notwithstanding  anything  to  the  contrary  contained  in  this  Agreement,  whenever  the
Purchaser exercises a right, election, demand or option hereunder and the Company does not timely perform its related obligations within the
periods  therein  provided,  then  the  Purchaser  may  rescind  or  withdraw,  in  its  sole  discretion  from  time  to  time  upon  written  notice  to  the
Company, any relevant notice, demand or election in whole or in part without prejudice to its future actions and rights, unless such rescission
or withdrawal would materially prejudice the Company.

6.13    Replacement of the Shares. If any certificate or instrument evidencing any Shares is mutilated, lost, stolen or destroyed, the
Company  shall  issue  or  cause  to  be  issued  in  exchange  and  substitution  for  and  upon  cancellation  thereof,  or  in  lieu  of  and  substitution
therefor, a new certificate or instrument, but only upon receipt of evidence reasonably satisfactory to the Company and the Transfer Agent of
such loss, theft or destruction and the execution by the holder thereof of a customary lost certificate affidavit of that fact and an agreement to
indemnify  and  hold  harmless  the  Company  and  the  Transfer  Agent  for  any  losses  in  connection  therewith  or,  if  required  by  the  Transfer
Agent, a bond in such form and amount as is required by the Transfer Agent. The applicants for a new certificate or instrument under such
circumstances  shall  also  pay  any  reasonable  third-party  costs  associated  with  the  issuance  of  such  replacement  Shares.  If  a  replacement
certificate or instrument evidencing any Shares is requested due to a mutilation thereof, the Company may require delivery of such mutilated
certificate or instrument as a condition precedent to any issuance of a replacement.

6.14        Remedies.  In  addition  to  being  entitled  to  exercise  all  rights  provided  herein  or  granted  by  law,  including  recovery  of
damages, each of the Purchaser and the Company will be entitled to specific performance hereunder. Except as expressly set forth herein, the
parties  agree  that  monetary  damages  may  not  be  adequate  compensation  for  any  loss  incurred  by  reason  of  any  breach  of  obligations
described in the foregoing sentence and hereby agree to waive in any action for specific performance of any such obligation (other than in
connection with any action for a temporary restraining order) the defense that a remedy at law would be adequate.

6.15        Adjustments  in  Share  Numbers  and  Prices.  In  the  event  of  any  stock  split,  subdivision,  dividend  or  distribution  to  all
stockholders of the Company payable in shares of Common Stock (or other securities or rights convertible into, or entitling the holder thereof
to  receive  directly  or  indirectly  shares  of  Common  Stock),  combination  or  other  similar  recapitalization  or  event  occurring  after  the  date
hereof  and  prior  to  the  Closing,  each  reference  herein  to  a  number  of  shares  or  a  price  per  share  shall  be  deemed  to  be  amended  to
appropriately account for such event.

6.16    Termination. This Agreement may be terminated and the sale and purchase of the Shares abandoned at any time prior to the
Closing by either the Company or the Purchaser upon written notice to the other, if the Closing has not been consummated on or prior to
5:00 P.M., New York City time, on the Outside Date; provided, however, that the right to terminate this Agreement under this Section 6.16
shall not be available to any Person whose failure to comply with its obligations under this Agreement has been the cause of or resulted in the
failure of the Closing to occur on or before such time. Nothing in this Section 6.16 shall be deemed to release any party from any liability for
any breach by such party of the terms and provisions of this Agreement or to impair the right of any party to compel specific performance by
any  other  party  of  its  obligations  under  this  Agreement.  Upon  a  termination  in  accordance  with  this  Section 6.16,  the  Company  and  the
Purchaser shall not have any further obligation or liability (including arising from such termination) to the other.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

26

IN  WITNESS  WHEREOF,  the  parties  hereto  have  caused  this  Stock  Purchase  Agreement  to  be  duly  executed  by  their  respective

authorized signatories as of the date first indicated above.

ALPINE IMMUNE SCIENCES, INC.

By:    /s/ Paul Rickey            
    Name: Paul Rickey    
    Title: Senior Vice President and Chief Financial Officer    

    HORIZON THERAPEUTICS IRELAND DAC

    By: /s/ William D. Gannon    
    Name: William D. Gannon
    Title: Director
    Tax ID No.: IE6396554L

Purchaser’s Address for Notice and Delivery:

70 St. Stephen’s Green
Dublin 2, D02 E2X4, Ireland
Telephone No.: +353 (0) 1 772 2100
Facsimile No.: +353 (0) 1 772 2101
E-mail Address: legal@horizontherapeutics.com
Attention: General Counsel

[Signature Page to Stock Purchase Agreement]

EXHIBITS:

A:    Wire Instructions
B:    Form of Secretary’s Certificate
C-1:     Accredited Investor Questionnaire
C-2:    Book-Entry Questionnaire
D:    Form of Officer’s Certificate

EXHIBIT A

WIRE INSTRUCTIONS

EXHIBIT B

FORM OF SECRETARY’S CERTIFICATE

The  undersigned  hereby  certifies  that  he  is  the  duly  elected,  qualified  and  acting  Secretary  of  Alpine  Immune  Sciences,  Inc.,  a  Delaware
corporation  (the  “Company”),  and  that  as  such  he  is  authorized  to  execute  and  deliver  this  certificate  in  the  name  and  on  behalf  of  the
Company  and  in  connection  with  the  Stock  Purchase  Agreement,  dated  as  of  December  15,  2021,  by  and  among  the  Company  and  the
investor  party  thereto  (the  “Stock  Purchase  Agreement”),  and  further  certifies  in  his  official  capacity,  in  the  name  and  on  behalf  of  the
Company, the items set forth below. Capitalized terms used but not otherwise defined herein shall have the meaning set forth in the Stock
Purchase Agreement.

1.       Attached  hereto  as  Exhibit A  is  a  true,  correct  and  complete  copy  of  the  resolutions  duly  adopted  by  the  Board  of  Directors  of  the
Company. Such resolutions have not in any way been amended, modified, revoked or rescinded, have been in full force and effect
since their adoption to and including the date hereof and are now in full force and effect.

2.    Attached hereto as Exhibit B is a true, correct and complete copy of the Certificate of Incorporation of the Company, together with any
and all amendments and certificates of designation thereto currently in effect, and no action has been taken to further amend, modify
or repeal such Certificate of Incorporation, the same being in full force and effect in the attached form as of the date hereof.

3.    Attached hereto as Exhibit C is a true, correct and complete copy of the Bylaws of the Company and any and all amendments thereto
currently in effect, and no action has been taken to further amend, modify or repeal such Bylaws, the same being in full force and
effect in the attached form as of the date hereof.

4.    Each person listed below has been duly elected or appointed to the position(s) indicated opposite his name and is duly authorized to sign
the Stock Purchase Agreement on behalf of the Company, and the signature appearing opposite such person’s name below is such
person’s genuine signature.

Name
Mitchell H. Gold
Stanford Peng

Paul Rickey

Position
Chief Executive Officer
President  and  Head  of  Research  and
Development
Chief Financial Officer

Signature
_________________________

_________________________
_________________________

2

IN WITNESS WHEREOF, the undersigned has hereunto set his hand as of this ____ day of December 2021.

I,  Mitchell  H.  Gold,  Chief  Executive  Officer,  hereby  certify  that  Paul  Rickey  is  the  duly  elected,  qualified  and  acting  Secretary  of  the
Company and that the signature set forth above is his true signature.

Secretary

Chief Executive Officer

3

        
        
EXHIBIT A

Resolutions

4

EXHIBIT B

Certificate of Incorporation

5

EXHIBIT C

Bylaws

6

EXHIBIT C-1

ACCREDITED INVESTOR QUESTIONNAIRE

(ALL INFORMATION WILL BE TREATED CONFIDENTIALLY)

To:    Alpine Immune Sciences, Inc.

This Investor Questionnaire (“Questionnaire”) must be completed in connection with the offer and sale of the shares of the common stock,
par  value  $0.001  per  share  (the  “Shares”),  of  Alpine  Immune  Sciences,  Inc.,  a  Delaware  corporation  (the  “Corporation”). The Shares are
being offered and sold by the Corporation without registration under the Securities Act of 1933, as amended (the “Act”), and the securities
laws  of  certain  states,  in  reliance  on  the  exemptions  contained  in  Section  4(a)(2)  of  the  Act  and  in  reliance  on  similar  exemptions  under
applicable state laws. The Corporation must determine that you meet certain suitability requirements before offering or selling Shares to you.
The purpose of this Questionnaire is to assure the Corporation that you meet the applicable suitability requirements. The information supplied
by you will be used in determining whether you meet such criteria, and reliance upon the private offering exemptions from registration is
based in part on the information herein supplied.

This  Questionnaire  does  not  constitute  an  offer  to  sell  or  a  solicitation  of  an  offer  to  buy  any  security.  Your  answers  will  be  kept  strictly
confidential.  However,  by  signing  this  Questionnaire,  you  will  be  authorizing  the  Corporation  to  provide  a  completed  copy  of  this
Questionnaire to such parties as the Corporation deems appropriate in order to ensure that the offer and sale of the Shares will not result in a
violation of the Act or the securities laws of any state and that you otherwise satisfy the suitability standards applicable to purchasers of the
Shares. You must answer all applicable questions and complete, date and sign this Questionnaire. Please print or type your responses and
attach additional sheets of paper if necessary to complete your answers to any item.

PART A.    BACKGROUND INFORMATION

Name of Beneficial Owner of the Shares:    

Business Address:    

    (Number and Street)

(City)    (State)    (Zip Code)

Telephone Number: (___)     

If a corporation, partnership, limited liability company, trust or other entity:
Type of entity:    
State of formation:         Approximate Date of formation:     

Were you formed for the purpose of investing in the securities being offered?

    Yes ____    No ____

If an individual:

Residence Address:    
                (Number and Street)

(City)    (State)    (Zip Code)
Telephone Number: (___)     

Age: __________    Citizenship: ____________    Where registered to vote: _______________

7

    
    
Set forth in the space provided below the state(s), if any, in the United States in which you maintained your residence during the past two
years and the dates during which you resided in each state:

Are you a director or executive officer of the Corporation?

    Yes ____    No ____

Social Security or Taxpayer Identification No.    

PART B.    ACCREDITED INVESTOR QUESTIONNAIRE

    In order for the Company to offer and sell the Shares in conformance with state and federal securities laws, the following information must
be obtained regarding your investor status. Please initial each category applicable to you as a Purchaser of Shares of the Company.

__ (1)     A bank as defined in Section 3(a)(2) of the Securities Act, or any savings and loan     association or other institution

as defined in Section 3(a)(5)(A) of the Securities Act     whether acting in its individual or fiduciary capacity;

__ (2)     A broker or dealer registered pursuant to Section 15 of the Securities Exchange Act     of 1934;

__ (3)     An insurance company as defined in Section 2(13) of the Securities Act;

__ (4)     An investment company registered under the Investment Company Act of 1940 or a business development company

as defined in Section 2(a)(48) of that Act;

__ (5)     A Small Business Investment Company licensed by the U.S. Small Business Administration under Section 301(c)

or (d) of the Small Business Investment Act of 1958;

__ (6)     A plan established and maintained by a state, its political subdivisions, or any agency or instrumentality of a state or
its political subdivisions, for the benefit of its employees, if such plan has total assets in excess of $5,000,000;

__ (7)     An employee benefit plan within the meaning of the Employee Retirement Income Security Act of 1974, if the
investment  decision  is  made  by  a  plan  fiduciary,  as  defined  in  Section  3(21)  of  such  act,  which  is  either  a  bank,
savings and loan association, insurance company, or registered investment adviser, or if the employee benefit plan
has total assets in excess of $5,000,000 or, if a self-directed plan, with investment decisions made solely by persons
that are accredited investors;

__ (8)     A private business development company as defined in Section 202(a)(22) of the Investment Advisers Act of 1940;
__  (9)         An  organization  described  in  Section  501(c)(3)  of  the  Internal  Revenue  Code,  a  corporation,  Massachusetts  or
similar business trust, a partnership, or a limited liability company, not formed for the specific purpose of acquiring
the Shares, with total assets in excess of $5,000,000;

__ (10) A trust, with total assets in excess of $5,000,000, not formed for the specific purpose of acquiring the Shares, whose
purchase  is  directed  by  a  sophisticated  person  who  has  such  knowledge  and  experience  in  financial  and  business
matters that such person is capable of evaluating the merits and risks of investing in the Company;

8

__  (11)          A  Rural  Business  Investment  Company  as  defined  in  Section  384A  of  the  Consolidated  Farm  and  Rural

Development Act;

__ (12)     An investment advisor registered pursuant to Section 203 of the Investment Advisers Act of 1940 or registered

__ (13)     An investment advisor relying on the exemption from registering with the SEC under Section 203(l) or (m) of the

pursuant to the laws of a state;

Investment Advisors Act of 1940;

__ (14) An entity, of a type not listed above, not formed for the specific purpose of acquiring the securities offered, owning
investments in excess of $5,000,00 (for purposes of this category, “investments” is defined in Rule 2a51-1(b) under
the Investment Company Act of 1940);

__ (15)     A “family office,” as defined in Rule 202(a)(11)(G) 1 under the Investment Advisers Act of 1940 (i) with assets
under management in excess of $5,000,000; (ii) that is not formed for the specific purpose of acquiring the securities
offered; and (iii) whose prospective investment is directed by a person who has such knowledge and experience in
financial and business matters that such family office is capable of evaluating the merits and risks of the prospective
investment (That person must complete question 5 below in this questionnaire);

__ (16)     A “family client,” as defined in Rule 202(a)(11)(G) 1 under the Investment Advisers Act of 1940, of a family
office meeting the requirements described in the item above and whose prospective investment in the Company is
directed by such family office by a person who has such knowledge and experience in financial and business matters
that such family office is capable of evaluating the merits and risks of the prospective investment (That person must
complete question 5 below in this questionnaire);

___(17)     A natural person whose individual net worth, or joint net worth with that person’s             spouse (in each case,

excluding the value of such person’s primary residence), at the time of his purchase exceeds $1,000,000;

    ___(18)     A natural person who had an individual income in excess of $200,000 in each of the two most recent years, or joint
income with that person’s spouse in excess of $300,000, in each of those years, and has a reasonable expectation of
reaching the same income level in the current year;

___(19)     An executive officer or director of the Company;

___(20)  An  entity  in  which  all  of  the  equity  owners  qualify  under  any  of  the  above  subparagraphs.  If  the  undersigned
belongs  to  this  investor  category  only,  list  the  equity  owners  of  the  undersigned,  and  the  investor  category  which
each such equity owner satisfies.

A.    FOR EXECUTION BY AN INDIVIDUAL:

            By        

Date

Print Name:        

B.    FOR EXECUTION BY AN ENTITY:

    Entity Name:        

            By            

9

Date

Print Name:        
Title:         

C.    ADDITIONAL SIGNATURES (if required by partnership, corporation or trust document):

            By        

Date

            By        

Date

Entity Name:        

Print Name:        
Title:         

Entity Name:        

Print Name:        
Title:         

10

EXHIBIT C-2

BOOK-ENTRY QUESTIONNAIRE

Pursuant to Section 2.2(b) of the Agreement, please provide us with the following information:

The exact name that the Shares are to be registered in (this is the name that will
appear  on  the  book-entry  notation(s)).  You  may  use  a  nominee  name  if
appropriate:
The relationship between the Purchaser of the Shares and the Registered Holder
listed in response to Item 1 above:
The  mailing  address,  telephone  and  telecopy  number  of  the  Registered  Holder
listed in response to Item 1 above:

The Tax Identification Number (or, if an individual, the Social Security Number)
of the Registered Holder listed in response to Item 1 above:

1.

2.

3.

4.

EXHIBIT D

FORM OF OFFICER’S CERTIFICATE

The  undersigned,  the  Chief  Executive  Officer  of  Alpine  Immune  Sciences,  Inc.,  a  Delaware  corporation  (the  “Company”),  pursuant  to
Section  5.1(i)  of  the  Stock  Purchase  Agreement,  dated  as  of  December  15,  2021,  by  and  among  the  Company  and  the  investor  signatory
thereto  (the  “Stock  Purchase  Agreement”),  hereby  represents,  warrants  and  certifies  as  follows  (capitalized  terms  used  but  not  otherwise
defined herein shall have the meaning set forth in the Stock Purchase Agreement):

1.        The  representations  and  warranties  of  the  Company  contained  in  the  Stock  Purchase  Agreement  are  true  and  correct  in  all
material respects (except for those representations and warranties which are qualified as to materiality or Material Adverse
Effect, in which case, such representations and warranties shall be true and correct in all respects) as of the date when made
and as of the date hereof, as though made on and as of such date, except for such representations and warranties that speak as
of a specific date.

2.        The  Company  has  performed,  satisfied  and  complied  in  all  material  respects  with  all  covenants,  agreements  and  conditions

required by the Stock Purchase Agreement to be performed, satisfied or complied with by it at or prior to the date hereof.

IN WITNESS WHEREOF, the undersigned has executed this certificate this ___ day of __________, _____.

Chief Executive Officer

        
EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

Registration Statement (Form S-8 No. 333-205220) pertaining to the 2012 Stock Incentive Plan of N30 Pharmaceuticals, Inc., 2015 Equity
Incentive Plan of Nivalis Therapeutics, Inc. and Employee Stock Purchase Plan of Nivalis Therapeutics, Inc.,
Registration Statement (Form S-8 No. 333-211197) pertaining to the Employment Inducement Awards, granted by Nivalis Therapeutics, Inc.,
Registration Statement (Post-Effective Amendment No. 1 on Form S-8 to Form S-4 No. 333-218134) pertaining to the Amended and Restated
2015 Stock Plan of Alpine Immune Sciences, Inc.,
Registration Statement (Form S-8 No. 333-223965) pertaining to the Amended and Restated 2015 Stock Plan, as amended, and the 2015 Equity
Incentive Plan of Alpine Immune Sciences, Inc.,
Registration Statements (Form S-8 Nos. 333-225792, 333-230369, 333-237479, 333-239233, and 333-254446) pertaining to the 2018 Equity
Incentive Plan of Alpine Immune Sciences, Inc.,
Registration Statements (Form S-8 Nos. 333-230372 and 333-258674) pertaining to the Stand-Alone Inducement Stock Option Grants of Alpine
Immune Sciences, Inc.,
Registration Statement (Post-Effective Amendment No. 1 on Form S-3 to Form S-1 No. 333-244409) and related Prospectus of Alpine Immune
Sciences, Inc. for the registration of 7,709,416 shares of its common stock,
Registration Statement (Form S-3 No. 333-256107) of Alpine Immune Sciences, Inc. to offer or sell securities for the aggregate offering price of
up to $150,000,000, and
Registration Statement (Form S-3 No. 333-260971) and related Prospectus of Alpine Immune Sciences, Inc. for the registration of 9,680,844
shares of its common stock

of our report dated March 17, 2022, with respect to the consolidated financial statements of Alpine Immune Sciences, Inc., included in this Annual Report
(Form 10-K) of Alpine Immune Sciences, Inc. for the year ended December 31, 2021.

/s/ Ernst & Young

Seattle, Washington
March 17, 2022

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, Mitchell H. Gold, M.D., certify that:

1.    I have reviewed this Annual Report on Form 10-K of Alpine Immune Sciences, 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(s) 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(s) 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 17, 2022

/s/ Mitchell H. Gold, M.D.
Mitchell H. Gold, M.D.

Executive Chairman 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, Paul Rickey, certify that:

1.    I have reviewed this Annual Report on Form 10-K of Alpine Immune Sciences, 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(s) 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(s) 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 17, 2022

/s/ Paul Rickey
Paul Rickey
Senior Vice President and Chief Financial Officer
(Principal Accounting Officer and Principal Financial
Officer)

 
ALPINE IMMUNE SCIENCES, INC.
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

In connection with the Annual Report of Alpine Immune Sciences, Inc. (the “Company”) on Form 10-K for the year ended December 31, 2021, as filed
with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mitchell H. Gold, M.D., Executive Chairman and Chief Executive
Officer (Principal Executive Officer) of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-
Oxley Act of 2002, that to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Mitchell H. Gold, M.D.
Mitchell H. Gold, M.D.
Executive Chairman and Chief Executive Officer
(Principal Executive Officer)

March 17, 2022

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to the Company and will be
retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

This certification accompanies the Report to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be
incorporated by reference into any filing of Alpine Immune Sciences, 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 the Report), irrespective of any general incorporation language contained in such filing.

ALPINE IMMUNE SCIENCES, INC.
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.2

In connection with the Annual Report of Alpine Immune Sciences, Inc. (the “Company”) on Form 10-K for the year ended December 31, 2021, as filed
with the Securities and Exchange Commission on the date hereof (the “Report”), I, Paul Rickey, Senior Vice President and Chief Financial Officer
(Principal Accounting Officer and Principal Financial Officer) of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section
906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Paul Rickey
Paul Rickey
Senior Vice President and Chief Financial Officer
(Principal Accounting Officer and Principal Financial Officer)

March 17, 2022

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to the Company and will be
retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

This certification accompanies the Report to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be
incorporated by reference into any filing of Alpine Immune Sciences, 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 the Report), irrespective of any general incorporation language contained in such filing.