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Xencor, Inc.

xncr · NASDAQ Healthcare
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Employees 250
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FY2020 Annual Report · Xencor, Inc.
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549

FORM 10-K

(Mark One)
☒

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

☐

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

For the fiscal year ended December 31, 2020
or

For the transition period from              to             

Commission file number: 001-36182
Xencor, Inc.
(Exact Name of Registrant as Specified in its Charter)

Delaware
(State or Other Jurisdiction of
Incorporation or Organization)
111 West Lemon Avenue, Monrovia, CA
(Address of Principal Executive Offices)

20-1622502
(I.R.S. Employer
Identification No.)
91016
(Zip Code)

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

(626) 305-5900
(Registrant’s Telephone Number, Including Area Code)

Title of each class
Common Stock, par value $0.01 per share

Trading Symbol
XNCR

Name of each exchange on which registered
The Nasdaq Global Market

Securities registered pursuant to Section 12(g) of the Act: None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒   No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐   No ☒
Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the

preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
Yes ☒   No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-

T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ⌧  No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a 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  ☒

Accelerated filer  ☐

Non-accelerated filer  ☐

Smaller reporting company  ☐
Emerging growth 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 Securities Exchange Act of 1934). Yes ☐   No ☒
The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was

last sold as of June 30, 2020 was $1,843,897,240.

The number of outstanding shares of the registrant’s common stock, par value $0.01 per share, as of February 16, 2021 was 57,945,225.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s proxy statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A in connection with the registrant’s

2021 Annual Meeting of Stockholders, which will be filed subsequent to the date hereof, are incorporated by reference into Part III of this Form 10-K. 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, 2020.

    
    
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PART I
Item 1
Item 1A
Item 1B
Item 2
Item 3
Item 4
PART II
Item 5

Item 6
Item 7
Item 7A
Item 8
Item 9
Item 9A
Item 9B
PART III
Item 10
Item 11
Item 12

Item 13
Item 14
PART IV
Item 15
Item 16
Signatures

Xencor, Inc.
FORM 10-K
For the Fiscal Year Ended December 31, 2020
Table of Contents

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

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases

of Equity Securities
Selected Financial Data
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements With Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information

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

Exhibits, Financial Statement Schedules
Form 10-K Summary

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The Xencor logo is a trademark of Xencor, Inc. XmAb, PDA and Protein Design Automation are also registered
trademarks of Xencor. All other product and company names are trademarks of their respective companies. References in
this Annual Report on Form 10-K to “we”, “our”, “us”, “Xencor” or “the Company” refer to Xencor, Inc.

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Forward-Looking Statements

PART I

This Annual Report on Form 10-K contains forward-looking statements 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. You should not
place undue reliance on these statements. We have based these forward-looking statements largely on our current
expectations and projections about future events and financial trends affecting the financial condition of our business.
Forward-looking statements should not be read as a guarantee of future performance or results and will not necessarily be
accurate indications of the times at, or by, which such performance or results will be achieved. Forward-looking statements
are based on information available at the time those statements are made and/or management’s good faith belief as of that
time with respect to future events, and are subject to risks and uncertainties that could cause actual performance or results
to differ materially from those expressed in or suggested by the forward-looking statements. Our actual results could differ
materially from those anticipated in these forward-looking statements as a result of various factors, including those set
forth below under Part I, Item 1A, “Risk Factors” in this Annual Report. These statements, which represent our current
expectations or beliefs concerning various future events, may contain words such as “may,” “will,” “expect,” “anticipate,”
“intend,” “plan,” “believe,” “estimate” or other words indicating future results. Such statements may include, but are not
limited to, statements concerning the following:

● the effects of the ongoing COVID-19 pandemic on our financial condition, results of operations, cash flows

and performance;

● our ability to execute on our plans to research, develop and commercialize our product candidates;

● the success of our ongoing and planned clinical trials;

● the timing of and our ability to obtain and maintain regulatory approval for our product candidates;

● our ability to identify additional products or product candidates with significant commercial potential that are

consistent with our business objectives;

● our ability to receive research funding and achieve anticipated milestones under our collaborations;

● our partners’ ability to advance drug candidates into, and successfully complete, clinical trials;

● our ability to attract collaborators with development, regulatory, and commercialization expertise;

● our ability to protect our intellectual property position;

● the rate and degree of market acceptance and clinical utility of our products;

● costs of compliance and our failure to comply with new and existing governmental regulations;

● the capabilities and strategy of our suppliers and vendors including key manufacturers of our clinical drug

supplies;

● significant competition in our industry;

● the potential loss or retirement of key members of management;

● our failure to successfully execute our growth strategy including any delays in our planned future growth;

● our failure to maintain effective internal controls; and

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● our ability to accurately estimate expenses, future revenues, capital requirements and needs for additional

financing.

Given these uncertainties, you should not place undue reliance on these forward-looking statements. These

forward-looking statements represent our estimates and assumptions only as of the date of this Annual Report, and except
as required by law, we undertake no obligation to update or revise publicly any forward-looking statements, whether as a
result of new information, future events, or otherwise after the date of this Annual Report. We qualify all of our forward-
looking statements by these cautionary statements.

Item 1.  Business.

Our Business

We are a clinical-stage biopharmaceutical company focused on discovering and developing engineered
monoclonal antibody and cytokine therapeutics to treat patients with cancer and autoimmune diseases who have unmet
medical needs. We are advancing a broad portfolio of clinical-stage drug candidates from our proprietary XmAb®
technology platforms. We use our protein engineering capabilities to increase our understanding of protein structure and
interactions and to design new XmAb technologies and development candidates with improved properties. In contrast to
conventional approaches to antibody design, which focus on the segment of antibodies that interact with target antigens,
our work is focused on the Fc domain, the part of an antibody that interacts with multiple segments of the immune system
and controls antibody structure. The Fc domain is constant and interchangeable among antibodies, and our engineered Fc
domains, the XmAb technology, can be readily substituted for natural Fc domains.

Our protein engineering capabilities and XmAb technologies enable us and our partners to develop antibodies and
biotherapeutic drug candidates with improved properties and function, which can provide innovative approaches to treating
disease and potential clinical advantage over other treatment options. For example, our capabilities have enabled us to
develop an antibody scaffold to rapidly create novel bispecific antibodies that bind two different targets simultaneously,
creating entirely new biological mechanisms. Other applications of our XmAb technologies enhance antibody performance
by increasing immune inhibitory activity, improving cytotoxicity, extending circulating half-life and stabilizing novel
protein structures, such as engineered cytokines. Currently, there are two marketed drugs that have been developed with
our XmAb technologies.

On July 31, 2020, the U.S. Food and Drug Administration (FDA) approved our partner MorphoSys’ Monjuvi®

(tafasitamab-cxix) in combination with lenalidomide, for the treatment of adult patients with relapsed or refractory diffuse
large B-cell lymphoma (DLBCL) not otherwise specified, including DLBCL arising from low grade lymphoma, and who
are not eligible for autologous stem cell transplant (ASCT). This indication is approved under accelerated approval based
on overall response rate. Continued approval for this indication may be contingent upon verification and description of
clinical benefit in a confirmatory trial(s). We created and initially developed tafasitamab, which incorporates our XmAb
Cytotoxic Fc Domain to enhance its tumor killing properties. Monjuvi is a registered trademark of MorphoSys AG.

Alexion's Ultomiris® (ravulizumab-cwvz) was first approved by the FDA in December 2018. It is now approved
in the U.S., Europe and Japan for the treatment of adult patients with paroxysmal nocturnal hemoglobinuria (PNH) and for
the treatment of patients with atypical hemolytic uremic syndrome (aHUS). Alexion used our Xtend™ Fc Domain to
enhance the half-life of Ultomiris to allow for a longer duration of action, less frequent dosing and reduced patient burden
of therapy compared to the previous generation therapy, Soliris®.

Our protein engineering capabilities allow us to continually explore new functionality in the Fc region, which

provides us with opportunities to:

● Create new technology platforms;

● Make new drug candidates for internal development or partnering opportunities; and

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● Provide collaboration and licensing opportunities with partners for application of our technologies,

access to our technologies, access to our drug candidates, or combinations of each.

Our Strategy

Our goal is to become a leading biopharmaceutical company focused on developing and commercializing

engineered biologic medicines to treat patients with severe and life-threatening diseases with unmet medical needs. Key
elements of our strategy are to:

1. Advance the clinical development of our XmAb bispecific antibody and cytokine drug candidates. Our
modular XmAb bispecific technology and protein engineering capabilities enable us to rapidly advance
multiple drug candidates into clinical development. We and our partners are enrolling Phase 1 studies for seven
of these candidates to treat patients with many different types of cancer, and an eighth, to be developed for
patients with autoimmune disease, is expected to start a Phase 1 study in early 2021. We and our partners plan
to advance additional bispecific antibodies and cytokines into clinical development in the future.

2. Build a large and diversified portfolio of XmAb drug candidates. We create new XmAb-engineered antibody
and cytokine product candidates to exploit the novel mechanisms of action enabled by our XmAb technology
platforms and advance them into our internal portfolio of preclinical and clinical-stage assets, or, if strategically
appropriate, we license certain drug candidates to leading pharmaceutical and biotechnology companies.

3. Leverage our protein engineering capabilities, XmAb technologies, and XmAb drug candidates with

partnerships, collaborations, and licenses to generate revenue streams, create new drug candidates and
combination treatments, and identify new indications for our pipeline of drug candidates.

Generate revenue streams. The plug-and-play nature of our XmAb technologies and our ability to
generate multiple drug candidates efficiently provides us opportunities to generate revenue from licensing and
collaboration arrangements. In 2020, we received total proceeds of $165 million in upfront payments, milestone
payments and royalties from such arrangements.

Create new drug candidates and investigate novel combination therapies. We seek to leverage our
XmAb technologies and drug candidates with partners to create novel drug candidates, including combination
therapies. In 2020, we entered into separate agreements with Atreca, Inc. and The University of Texas MD
Anderson Cancer Center to create novel CD3 bispecific antibody drug candidates. We also entered into a
clinical collaboration with MorphoSys AG and Incyte Corporation, in which we plan to conduct multiple
clinical studies in B-cell lymphomas, combining our plamotamab drug candidate with tafasitamab in
combination with lenalidomide. 

Identify new indications for our pipeline of drug candidates. In August 2020, we entered into a five-year
strategic collaboration with MD Anderson. We will support Investigator Sponsored Trials (ISTs) in which MD
Anderson's investigators may explore additional indications for our pipeline of candidates.

4. Broaden the functionality of our XmAb technology platform. We are conducting further research into the
function and application of antibody Fc domains in order to expand the scope of our XmAb technology
platforms. We use the modularity of our XmAb bispecific Fc technology to build bispecific antibodies and
cytokines in a variety of formats, recently introducing CD3 bispecific antibodies of a mixed valency format, the
XmAb 2+1 bispecific antibody. XmAb 2+1 bispecific antibodies may preferentially kill tumor cells with high
target expression which may be especially beneficial in designing antibodies that target solid tumors. 

Additionally, we have engineered CD28 bispecific antibodies to provide conditional CD28 co-stimulation of T
cells, activating them when bound to tumor cells. Targeted CD28 bispecific antibodies may provide conditional
co-stimulation of T cells, for example, to T cells recognizing neoantigens or in concert with CD3 T-cell
engaging bispecific antibodies.

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5. Continue to expand our patent portfolio protecting our XmAb technologies and XmAb candidates. We seek
to expand our intellectual property estate and protect our XmAb technologies, our development programs, and
product candidates by filing and prosecuting patents in the United States and other countries. Where
appropriate we will seek expansion and extension of patents issued for our product candidates.

XmAb Bispecific Technologies

A distinguishing feature of our XmAb technologies arises from our modular approach to protein engineering. This

provides us with flexibility to seek out new applications of the XmAb Bispecific Fc Domain and enables us to design new
bispecific antibody and cytokine drug candidates with distinct and novel mechanisms-of-action. This approach is illustrated
through the expansion of our portfolio of novel bispecific antibody and cytokine candidates. Our business, research, and
clinical efforts are to develop and advance our XmAb bispecific technologies and our portfolio of bispecific antibodies and
cytokines in oncology and autoimmune diseases.

CD3 candidates: our initial bispecific antibody candidates are designed to redirect T cells to tumor cells through

the engagement of an antigen on tumor cells and CD3, an activating receptor on T cells. We are currently conducting Phase
1 studies for three CD3 bispecific antibody candidates: plamotamab, vibecotamab, and tidutamab.

We have expanded our T-cell redirecting CD3 class of bispecific antibodies to create the XmAb 2+1 bispecific

antibody format, utilizing two identical tumor targeting domains and one CD3 targeting domain. The affinities for antigen
binding are reduced, which allows for selective engagement and killing of high antigen-expressing tumor cells over low
antigen-expressing normal cells. In preclinical models, XmAb 2+1 bispecific antibodies bound preferentially to tumor cells
compared to normal cells and effectively recruited T cells to kill tumor cells selectively. We believe that these properties
will be particularly important when developing bispecific antibodies against many solid tumor targets, which can have poor
tolerability because such targets are often expressed on a range of normal tissues, including critical organs. Our initial
candidate using the XmAb 2+1 format is XmAb819, an ENPP3 x CD3 bispecific antibody, and we expect to submit an
Investigational New Drug (IND) application in 2021.

CD28 candidates: T cells in the tumor microenvironment require both T cell receptor (TCR) and co-stimulatory

receptor engagement to achieve full activation. CD28 is a key immune co-stimulatory receptor on T cells; however, the
ligands that activate T cells through CD28 are often not expressed on tumor cells. Targeted CD28 bispecific antibodies may
provide conditional co-stimulation of T cells, for example, to T cells recognizing neoantigens or in concert with CD3 T-cell
engaging bispecific antibodies. We have engineered XmAb bispecific antibodies to provide conditional CD28 co-
stimulation of T cells, activating them when bound to tumor cells, and we are conducting preclinical studies of internal
CD28 candidates. Under our collaboration with Janssen Biotech, Inc., we are applying our XmAb bispecific Fc technology
to create and characterize CD28 bispecific antibody candidates against a prostate tumor target.

TME activator candidates: we expanded the functionality of our bispecific Fc platform with a suite of tumor
microenvironment (TME) activators that have been designed to promote tumor-selective T-cell activation by targeting
multiple checkpoints or co-stimulating receptors. These candidates incorporate our Xtend technology for longer half-life.
We are currently conducting Phase 1 studies for three TME activator candidates: XmAb717, XmAb841 and XmAb104.

Cytokine candidates: we have expanded the use of our bispecific Fc platform to engineer novel cytokine

candidates, which are not antibodies but fusions of a heterodimeric Fc domain and immune signaling proteins. Our
cytokine candidates are potency tuned to improve therapeutic index and incorporate our Xtend technology for longer half-
life. XmAb306 (RO7310729), formerly XmAb24306, is an IL-15/IL-15Ra-Fc fusion, which we believe is a promising
candidate for oncology combination therapies, and our partner Genentech is conducting a Phase 1 dose-escalation study. A
second IL-15 cytokine candidate, which is engineered with a target-specific binding arm for immune cell targeting, is also
being explored in preclinical studies.

XmAb564 is a wholly owned IL-2-Fc fusion that we intend to develop for the treatment of patients with
autoimmune diseases. In January 2021, the IND application for XmAb564 was allowed by the FDA, and we plan to initiate
a Phase 1 study in healthy volunteers for this candidate in early 2021.

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We continue to invest in our protein engineering efforts to identify novel technologies and drug candidates.

Other XmAb Fc Technologies

We have also designed additional XmAb Fc technologies and XmAb drug candidates. We have successfully

partnered our technologies and many drug candidates, and we will continue to seek additional partnering and licensing
opportunities for these technologies and candidates. Additional XmAb Fc domains include:

1.

Immune Inhibitor Fc Domain – selective immune inhibition and rapid target clearance, targeting the receptor
FcγRIIb;

2. Cytotoxic Fc Domain – increased cytotoxicity, targeting the receptors FcγRIIIa on natural killer (NK) cells and

FcγRIIa on other immune system cells; and

3. Xtend™ Fc Domain – extended antibody half-life, targeting the receptor FcRn on endothelial cells.

Drug Candidates in Clinical Development

Currently 20 drug candidates in clinical development have been engineered with one or more of our Fc
technologies, and one incorporates our DN-TNF technology. Ten of the candidates that are being advanced by us and our
partners have been engineered with our bispecific Fc domain for dual targeting and are bispecific antibody and cytokine
candidates; one candidate in clinical development incorporates our immune inhibitor Fc domain, and seven candidates
incorporate our cytotoxic or Xtend Fc domains.

Co-developed with Partners
Vibecotamab (XmAb14045)
XmAb306/RG6323 (XmAb24306)

Wholly Owned
Plamotamab (XmAb13676)
XmAb717 (XmAb20717)
Tidutamab (XmAb18087)
XmAb841 (XmAb22841)
XmAb104 (XmAb23104)
XmAb564 (XmAb27564)
XmAb698 (AMG 424)

Developed by Partners
Ultomiris*
Monjuvi*
VIR-7831
XPro1595/INB03/Quellor™
AIMab7195
Elipovimab (GS-9722)
VIR-3434
Novartis bispecific antibody
AMG 509
VIR-2482
GS-9723

*Alexion and MorphoSys are conducting additional Phase 3 studies in new indications with these candidates.

XmAb Bispecific Fc Drug Candidates

Currently 10 drug candidates that have been engineered with our bispecific Fc domain are in clinical development.

Six candidates are wholly owned and are being evaluated by us in Phase 1 studies. We are co-developing two candidates
with partners. In addition, partners are advancing two bispecific antibody candidates through clinical development.
Additional candidates are advancing through the preclinical stages of development. Drug candidates with our bispecific Fc
domain, both bispecific antibodies and cytokines, in clinical development include:

1. Plamotamab is a bispecific antibody that targets CD20, an antigen on B-cell tumors, and CD3, an activating

receptor on T cells. In February 2017, we dosed the first patient in an open-label, Phase 1, multiple-dose, dose
escalation study to assess the safety, tolerability, and preliminary anti-tumor activity of plamotamab in patients
with B-cell malignancies. At the ASH Annual Meeting in December 2019, we presented preliminary safety and
anti-tumor activity of plamotamab, including from patients with relapsed or refractory non-Hodgkin’s lymphoma
(NHL). We are enrolling patients in the ongoing dose-escalation study, and we are planning to initiate additional
studies for plamotamab in 2021 including a Phase 1/2 study evaluating the combination of

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plamotamab, tafasitamab (Monjuvi) and lenalidomide in patients with relapsed or refractory DLBCL, an
aggressive type of NHL.

2. XmAb717 is a bispecific antibody that targets PD-1 and CTLA-4, two immune checkpoint receptors, to

selectively activate the tumor microenvironment, and it is being developed in multiple types of solid tumors,
including for patients with castration-resistant prostate cancer. In July 2018, we dosed the first patient in an open-
label Phase 1 dose-escalation and expansion study to assess the safety, tolerability, and preliminary anti-tumor
activity of XmAb717 in patients with selected solid tumors.

We presented updated data from the study at the Annual Meeting of the Society for Immunotherapy of Cancer
(SITC) in November 2020. In the study's escalation phase, a dose of 10 mg/kg was identified as the recommended
dose for the multi-cohort, parallel-group expansion phase, based on an observation of consistent proliferation of
both CD8+ and CD4+ T cells, indicative of dual checkpoint blockade, and a complete response (CR) in one
patient with melanoma. At the data cut off on September 30, 2020, 89 patients had been treated at the
recommended dose in five dose expansion cohorts that enrolled patients with melanoma (n=20), renal cell
carcinoma (RCC, n=11), non-small cell lung cancer (NSCLC, n=20), castration-resistant prostate cancer (CRPC,
n=18) and other cancers without approved checkpoint therapies (n=20). XmAb717 was generally well-tolerated,
and the most common treatment-related adverse events were immune-related adverse events (irAEs); however,
rates of irAEs, including colitis, were lower than typically observed with CTLA-4 blockade. With exceptions for
rash and increases in transaminases, other Grade 3 or higher irAEs were reported for no more than three patients
each. The efficacy analysis included 42 evaluable patients at the recommended dose level. A complete response
was observed in a patient with melanoma (1/10), and partial responses were observed in multiple tumor types,
including melanoma (2/10), RCC (1/4), NSCLC (2/14), CRPC (1/4), and ovarian cancer (1/5). The objective
response rate across cohorts was 19.0% (8/42). Across the expansion cohorts, approximately half of evaluable
patients had at least 10% tumor shrinkage from baseline assessments, and nearly all these reductions occurred in
patients with prior checkpoint inhibitor treatment. The median duration of response was 119 days at the time of
the data cut off, and 24 patients remained on treatment. Of nine patients with prostate cancer who had baseline
and follow-up prostate-specific antigen (PSA) assessments, one achieved a PSA reduction of greater than 50
percent. Two additional patients achieved reductions of greater than 30 percent, one of whom had an unconfirmed
partial response by RECIST. Six of these nine patients remained on therapy as of the cut-off date.

In the first half of 2021, we plan to initiate a Phase 1b study of XmAb717 for patients with certain molecular
subtypes of CRPC, as a monotherapy or in combination depending on the subtype, as these patients represent a
high unmet medical need.

3. Vibecotamab is a bispecific antibody that targets CD123, an antigen on acute myeloid leukemia (AML) cells and

leukemic stem cells, and CD3, an activating receptor on T cells. It is being developed in collaboration with our
partner Novartis Institutes for BioMedical Research, Inc. (Novartis) and is being evaluated in a Phase 1 study. In
September 2016, we dosed the first patient in an open-label, multiple-dose, dose escalation study to assess the
safety, tolerability, and preliminary anti-tumor activity of vibecotamab in patients with relapsed or refractory
AML and other CD123-expressing hematologic malignancies. The study is ongoing, and additional patients are
being enrolled.

We presented updated data from the study at the American Society of Hematology (ASH) Annual Meeting in
December 2020. At data cut off on October 28, 2020, 112 heavily pretreated patients with relapsed or refractory
AML had received vibecotamab. Cytokine release syndrome (CRS) was the most common toxicity occurring in
61% of patients (n=68), and 9% of patients (n=10) experienced CRS at Grade 3 or higher. The majority of CRS
was observed in the first dose and was generally manageable with premedication. Additional mitigation measures
included selecting a lower priming dose, avoiding weekly dose step-up, and more frequent dosing in the first
week to allow a higher cumulative exposure and to avoid the potential CD123 antigen sink. There was no
evidence of drug related myelosuppression. Neurological events were infrequent and primarily Grade 1 and
Grade 2 headaches. The efficacy analysis included 54 evaluable patients who received a dose of at least 0.75
mcg/kg, completed at least the first cycle of treatment and had at least one post-treatment disease assessment.

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Two patients achieved complete remission (CR), and three patients achieved a CR with incomplete hematologic
recovery. Additionally, two patients reached a morphologic leukemia-free state, and one patient experienced
partial remission, as assessed by the investigator. The overall response rate (ORR) was 15% (n=8/54). Biomarker
analyses suggest that low baseline leukemic burden and low PD-1 expression on CD4+ and CD8+ T cells are
independent predictors of response. Seven responders had a baseline blast count less than or equal to 25% blasts
in bone marrow. The ORR increased to 26% (n=7/27) when using this threshold to define the population with low
disease burden for the analyses.

In 2021, pending final dose escalation data and agreement with our partner, Novartis, we plan to initiate
additional clinical studies evaluating vibecotamab.

4. Tidutamab is a bispecific antibody that targets somatostatin receptor 2, or SSTR2, a target on many

neuroendocrine-like tumor types, and CD3. In February 2018, we dosed the first patient in an open-label, Phase 1,
dose-escalation study to assess the safety, tolerability, and preliminary anti-tumor activity of tidutamab in patients
with neuroendocrine tumors (NET) or gastrointestinal stromal tumors (GIST).

In October 2020, we presented initial dose-escalation data in patients with NETs at the North American
Neuroendocrine Tumor Society’s 2020 Multidisciplinary NET Medical Virtual Symposium (NANETS).
Tidutamab was generally well tolerated at the recommended dose identified for the expansion portion of the study,
a 0.3 mcg/kg priming dose and subsequent 1.0 mcg/kg repeated doses. Analysis of peripheral blood biomarkers
indicated that tidutamab induced acute and sustained T-cell activation at the recommended dose for expansion.
The analysis also indicated a dose-dependent increase in proliferation and activation markers on CD8-positive
effector T cells, which is consistent with tidutamab's mechanism of action. Fourteen patients, including 12 across
the first three dose-escalation cohorts and two in the expansion cohort, were included in the analysis to describe
clinical activity. The best overall response was stable disease, with a disease control rate of 43% and a median
duration of treatment of approximately seven months. Completion of enrollment in the expansion cohort and
longer follow-up are required to evaluate progression-free survival and the clinical utility of tidutamab in this
NET patient population.

Because tidutamab induced sustained activation of cytotoxic T cells and engagement of the SSTR2 target, as
designed, and has an encouraging safety profile, we plan to initiate a clinical study for tidutamab in patients with
Merkel cell carcinoma and small cell lung cancer, SSTR2-expressing tumor types known to be responsive to
immunotherapy, in early 2021.

5. XmAb841 is a bispecific antibody that targets CTLA-4 and LAG-3, also an immune checkpoint receptor, and is

being developed in multiple oncology indications. We are advancing XmAb841 in combination with an anti-PD-1
drug to create a triple checkpoint blockade. In May 2019, we dosed the first patient in an open-label, Phase 1,
dose-escalation study to assess the safety, tolerability, and preliminary anti-tumor activity of XmAb841 in patients
with selected solid tumors. We are enrolling patients to a single-agent dose-escalation portion cohort and a cohort
combining XmAb841 with pembrolizumab.

6.

 XmAb104 is a bispecific antibody that targets PD-1 and ICOS, an immune co-stimulatory receptor, and is being
developed in multiple oncology indications. In May 2019, we dosed the first patient in a an open-label, Phase 1,
dose-escalation study to assess the safety, tolerability, and preliminary anti-tumor activity of XmAb104 in patients
with selected solid tumors. We continue to enroll patients with select solid tumors in the Phase 1 dose escalation
study.

7. XmAb306 (RO7310729) is an engineered cytokine, an IL15/IL15-receptor alpha complex fused to our bispecific
Fc domain (IL15/IL15Rα-Fc), and the Fc domain incorporates our Xtend technology for extended half-life. We
believe a broad combination development strategy will be critical to realize the potential of IL-15 cytokines like
XmAb306 in oncology. In February 2019, we entered into a research and license agreement with Genentech, Inc.
and F. Hoffmann-LaRoche Ltd. (collectively Genentech), to develop and commercialize novel IL-15 cytokine
therapeutics, whereby the companies are co-developing XmAb306 and other potential IL-15 programs.
Genentech is conducting a Phase 1 dose-escalation study of XmAb306 as a single agent and in combination

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with atezolizumab.

8. AMG 509 is a STEAP1 x CD3 bispecific antibody candidate for the treatment of patients with prostate cancer. In

December 2019, Amgen Inc. initiated a Phase 1 clinical study with AMG 509, a 2+1 bispecific antibody
candidate that was developed with our bispecific Fc technology under our collaboration with them. Amgen is
currently enrolling patients in a Phase 1 study of AMG 509 in patients with metastatic castration-resistant prostate
cancer (mCRPC).

9. XmAb698 (AMG 424), a CD38 x CD3 bispecific antibody candidate, was developed in the Amgen collaboration

and was being advanced by Amgen in a Phase 1 study. In 2020, Amgen notified us that they were terminating the
study, and the rights to the candidate reverted to us under the Agreement. We are currently evaluating this
candidate and plan to initiate a new study for it in 2021.

10. Novartis XmAb undisclosed bispecific antibody candidate: in December 2019, Novartis initiated a Phase 1
clinical study with an undisclosed bispecific antibody candidate that was developed with our bispecific Fc
technology under our collaboration with them.

XmAb Immune Inhibitor Fc Candidates

AIMab7195 (XmAb7195) uses our XmAb Immune Inhibitor Fc Domain and is designed to reduce blood serum

levels of IgE, which mediates allergic responses and allergic disease. In February 2020, we licensed this drug candidate to
Aimmune Therapeutics, Inc., now a wholly owned subsidiary of Nestlé S.A., which is advancing the candidate in clinical
studies for allergic indications.

Obexelimab targets CD19 with its variable domain and uses our XmAb Immune Inhibitor Fc Domain, which is

designed to inhibit the function of B cells, an important component of the immune system. We believe that obexelimab has
the potential to address a key unmet need in autoimmune diseases due to its combination of potent reversible B-cell
inhibition without B-cell depletion, enabling the immune system to resume natural function once treatment is no longer
needed. We are exploring opportunities to continue development of obexelimab with partners.

XmAb Cytotoxic Fc and Xtend Candidates

Currently, one drug engineered with our Xtend Fc Domain and one drug we engineered with our XmAb Cytotoxic

Fc Domain are marketed commercially by partners. In addition, our partners are advancing eight clinical programs with
antibodies engineered with XmAb technologies through clinical development: three programs are in Phase 3, one program
is in Phase 2, and four programs are in Phase 1. Other partners are conducting preclinical studies of drug candidates
engineered with these XmAb technologies.

● MorphoSys AG: In 2020, Monjuvi was approved for marketing by the U.S. FDA for the treatment of certain adult
patients with DLBCL. Tafasitamab’s marketing authorization application is under review by European regulators,
and MorphoSys is also conducting studies of tafasitamab in additional B-cell indications.

● Alexion Pharmaceuticals, Inc.: Ultomiris was approved for marketing by the U.S. FDA in 2018, and Alexion is

conducting Phase 3 studies of Ultomiris in additional neurology and nephrology indications.

● Gilead Sciences, Inc.: Gilead is advancing HIV candidates in clinical development that are broadly neutralizing

antibodies that incorporate our Fc technologies. Gilead is conducting Phase 1 clinical studies of elipovimab (GS-
9722) and GS-9723.

● Vir Biotechnology, Inc.: Vir is advancing three candidates in clinical development. VIR-7831 is an antibody that
is being investigated in a Phase 3 study as a potential treatment for the treatment of patients with COVID-19.
VIR-2482 is being evaluated in a Phase 1/2 study as a universal prophylactic for influenza A. VIR-3434 is being
evaluated in a Phase 1 study as a potential treatment for patients with hepatitis B virus infection.

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● Omeros Corporation, Viridian Therapeutics, Inc. and Catabasis Pharmaceuticals, Inc. each are conducting

preclinical studies with candidates that incorporate our XmAb technologies.

XPro1595

In October 2017, we licensed the rights to XPro1595, a proprietary TNF inhibitor candidate to INmune Bio, Inc.

INmune is currently conducting a Phase 2 study in hospitalized patients with respiratory symptoms from COVID-19
infection, as Quellor™; a Phase 1 study in patients Alzheimer’s disease, as XPro1595; and a Phase 1 study in patients with
advanced cancers, as INB03.

Collaborations, Partnerships and Licensing Arrangements

A key part of our business strategy is to leverage our protein engineering capabilities, XmAb technologies, and
drug candidates with partnerships, collaborations and licenses. Through these arrangements we generate revenues in the
form of upfront payments, milestone payments and royalties. For partnerships for our drug candidates, we aim to retain a
major economic interest in these candidates through transactions that allow us to retain major geographic commercial
rights, provide for profit-sharing on future sales of approved products, include co-development options, and also the right
to conduct independent clinical studies with drug candidates developed in the collaboration.

Examples of arrangements we have entered with our partners include:

● Product Licenses: Genentech, MorphoSys AG, Nestlé S.A., Novartis AG, INmune Bio, Inc.

● Novel Bispecific Antibody Collaborations: Janssen Biotech, Inc., Astellas Pharma, Inc., Amgen Inc., Novartis

AG

● Technology Licensing Agreements: Alexion Pharmaceuticals, Inc., Vir Biotechnology, Inc., Gilead Sciences,

Inc., Omeros Corporation, Viridian Therapeutics, Inc., Catabasis Pharmaceuticals, Inc.

● Strategic Collaborations: MorphoSys AG, Atreca, Inc., The University of Texas MD Anderson Cancer

Center

Product Licenses

Product licenses are arrangements in which we have internally developed drug candidates, and based on a
strategic review we licensed partial or full rights to third parties to continue development and potential commercialization.
We seek partners that can provide infrastructure and resources to successfully develop our drug candidates, have a track
record of successfully developing and commercializing medicines, or have a portfolio of development-stage candidates and
commercialized medicines which could potentially be developed in rational combinations with our drug candidates.

Genentech

In February 2019, we entered into an agreement with Genentech to develop and commercialize novel IL-15
cytokine therapeutics that use our bispecific Fc technology, including XmAb306, declared as a Collaboration Product under
the agreement. We are jointly collaborating on the worldwide development of XmAb306 with Genentech maintaining
worldwide commercialization rights, subject to us having a co-promotion option in the U.S. We retain the right to perform
clinical studies with XmAb306 at our sole expense in combination with other therapeutic agents, subject to certain
restrictions. Genentech received a worldwide exclusive license to XmAb306.

We received an upfront payment of $120.0 million. We are eligible to receive up to $160.0 million in clinical

milestone payments for XmAb306, up to $180.0 million in clinical milestone payments for each new Collaboration
Product, and a 45% share of net profits from sales from all Collaboration Products, while also sharing in the net losses at

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the same percentage rate. We are sharing in 45% of development and commercialization costs of Collaboration Products,
while Genentech will pay for commercial launch costs. We are conducting a two-year joint research program with
Genentech to discover additional IL-15 programs.

MorphoSys AG

In July 2020, the FDA approved Monjuvi® (tafasitamab-cxix) in combination with lenalidomide for treating
certain patients with DLBCL. Tafasitamab, which we engineered with an XmAb Cytotoxic Fc Domain, is the second
product with XmAb technology to be approved by the FDA.

In 2010, we licensed exclusive worldwide rights to develop and commercialize tafasitamab (formerly MOR208
and XmAb5574) to MorphoSys. In 2020, we earned a total of $37.5 million in regulatory milestones and royalties of $1.5
million on net sales. We are also eligible to receive up to $98.0 million in additional milestones for development of
tafasitamab in additional oncology indications and $50.0 million in sales milestones across all indications. We are entitled
to receive tiered royalties in the high-single digit to low-double digit percent range on net sales. Monjuvi is co-
commercialized in the U.S. by MorphoSys and Incyte Corporation. The European Marketing Authorization Application for
tafasitamab is currently under review by the European Medicines Agency.

Nestlé S.A./Aimmune Therapeutics, Inc.

In February 2020, we granted Aimmune Therapeutics, Inc., an exclusive worldwide license to develop and
commercialize XmAb7195, which was renamed AIMab7195. We received an upfront payment of $9.6 million in cash and
shares of Aimmune common stock. Aimmune was subsequently acquired by Nestlé S.A. Nestlé is responsible for all
further development and commercialization activities for AIMAb7195. We are eligible to receive up to $385.0 million in
milestones, which includes $22.0 million in development milestones, $53.0 million in regulatory milestones and $310.0
million in sales milestones, and tiered royalties in the high-single to mid-teen percent range on net sales of approved
products. Nestlé is planning additional studies of AIMab7195.

 Novartis AG

In connection with our June 2016 Collaboration and License Agreement with Novartis (the Novartis Agreement),

we granted Novartis certain exclusive rights to research, develop, and commercialize vibecotamab. We are eligible to
receive up to $325.0 million in milestone payments in connection with the development of vibecotamab, including $90.0
million in development milestones, $110.0 million in regulatory milestones, and $125.0 million in sales milestones, and
low-double digit royalties on sales of approved products in all territories outside the United States. We retained the
commercialization rights to vibecotamab in the U.S. We and Novartis are co-developing vibecotamab worldwide and are
sharing development costs equally.

INmune Bio, Inc.

In October 2017, we entered into an agreement with INmune Bio, Inc., in which we provided INmune with an

exclusive license to our XPro1595 drug candidate. In connection with the license, we received 1,585,000 shares of INmune
common stock and an option to acquire up to 10% of the outstanding shares of INmune for $10.0 million. We are also
eligible to receive a percentage of sublicensing revenue received for XPro1595 and royalties in the mid-single digit
percentage range on the sale of approved products. INmune is currently conducting a Phase 2 study in hospitalized patients
with respiratory symptoms from COVID-19 infection, as Quellor™; a Phase 1 study in patients Alzheimer’s disease, as
XPro1595; and a Phase 1 study in patients with advanced cancers, as INB03.

Private Company

In November 2020, we entered into an agreement with a newly formed, privately held biotechnology company to
which we licensed the exclusive worldwide rights to develop and commercialize three preclinical-stage Fc-engineered drug
candidates for autoimmune disease: XmAb6755, XPro9523 and XmAb10717. These programs incorporate an Xtend Fc
Domain, a Cytotoxic Fc Domain, or both. We received a 15% equity interest in the company, and we will also

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receive royalties on net sales of approved products in the mid-single digit to mid-teen percentage range.

Novel Bispecific Antibody Collaborations

Novel bispecific antibody collaborations are arrangements in which our partner seeks to create a bispecific

antibody using one or more of our XmAb bispecific technologies. Our partners provide an antibody or an antigen against
tumors, and we conduct limited research and development activities to create potential bispecific antibody candidates for
further development and commercialization by our partners.

Janssen Biotech, Inc.

In November 2020, we entered into an agreement, which became effective in December 2020, with Janssen
Biotech, Inc., to develop XmAb bispecific antibodies against CD28 and an undisclosed prostate tumor target, for the
potential treatment of patients with prostate cancer. Under the agreement, we will conduct research activities to develop
CD28 bispecific drug candidates for further development by Janssen. Preclinical activities and all clinical development,
regulatory and commercial activities will be conducted by Janssen, which has exclusive worldwide rights to develop and
commercialize the novel drug candidates developed in the collaboration. We received a $50.0 million upfront payment and
are eligible to receive a total of $662.5 million in milestone payments which include $161.9 million in development
milestones, $240.6 million in regulatory milestones, and $260.0 million in sales milestones. We are also eligible to receive
tiered royalties in the high-single to low-double digit percentage range on net sales.

Upon development of a bispecific candidate by Janssen through proof of concept, the agreement provides us the
right to opt-in to fund 20% of development costs and to perform up to 30% of detailing efforts in the U.S. If we exercise
this right, we will be eligible to receive tiered royalties in the low-double digit to mid-teen digit percentage range.

Both we and Janssen also have the right to access predefined agents from each other's portfolios to evaluate

potential combination therapies in prostate cancer, subject to certain limitations.

Astellas Pharma, Inc.

In March 2019, we entered into an agreement with Astellas Pharma, Inc., under which we applied our XmAb

bispecific Fc technology to an antigen pair provided by Astellas and generated bispecific antibody candidates for further
certain characterization and testing, and in 2019, we completed delivery of the candidates to Astellas for development and
potential commercialization. Astellas was granted a worldwide exclusive license, with the right to sublicense products in
the field created by the research activities. We received an upfront payment of $15.0 million, and we are eligible to receive
up to $240.0 million in milestones which include $32.5 million in development milestones, $57.5 million in regulatory
milestones and $150.0 million in sales milestones and royalties on net sales in the high-single to low-double digit
percentage range. In 2020, we received a $2.5 million milestone payment related to Astellas advancing a bispecific
candidate into IND enabling studies, and we are eligible to receive an additional $30.0 million in development milestones
as the program advances.

Amgen Inc.

In September 2015, we entered into an agreement with Amgen Inc. to develop and commercialize bispecific

antibody product candidates using our proprietary XmAb bispecific Fc technology.

We granted Amgen an exclusive license to the rights to our CD38 x CD3 preclinical program, and they developed

AMG 424. In May 2020, Amgen notified us it was terminating its rights with respect to the CD38 x CD3 program,
including AMG 424. Under the terms of the agreement, the rights to the AMG 424 program reverted to us. We renamed the
program XmAb698 and plan to initiate a new study for it in 2021.

Amgen also applied our XmAb bispecific Fc technology to create AMG 509, a STEAP1 x CD3 XmAb 2+1
bispecific antibody. We have received a total of $60.5 million in upfront and milestone payments and are eligible to receive
up to $255.0 million in future development, regulatory and sales milestone payments in total for the STEAP1 x

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CD3 program and royalties on net sales.

 Novartis AG

In connection with our June 2016 agreement with Novartis, we also applied our XmAb bispecific Fc technology
to two target pair antibodies selected by Novartis. Novartis is responsible for development and commercialization of these
programs. We are eligible to receive up to $250.0 million in milestone payments for each program which includes $50.0
million in development milestones, $100.0 million in regulatory milestones, and $100.0 million in sales milestones and
royalties in the mid-single digit percent range on net sales of approved products. We completed delivery of one bispecific
antibody candidate in 2017 and a second bispecific antibody candidate in 2018. In December 2019, Novartis dosed the first
patient in a Phase 1 study of an undisclosed bispecific antibody candidate, and we received a $10.0 million milestone
payment.

We have the right to participate in the development and commercialization of one of these programs prior to

submission of an IND for such program. If we elect to participate in development, we will assume 25% of the worldwide
development costs for the program and 50% of commercialization costs and will receive 50% of the U.S. profits on net
sales of the product.

Technology Licensing Agreements

We enter into technology licensing agreements in which we license access to one or more of our XmAb Fc
technologies on a restricted basis, typically to our XmAb Cytotoxic Fc Domain and/or our Xtend Fc Domain. Our partners
are responsible for all research, development and commercialization activities of the drug candidates. The plug-and-play
nature of XmAb technologies allows us to license access to our platforms with no internal research and development
activities required of us.

Alexion Pharmaceuticals, Inc.

Ultomiris® (ravulizumab-cwvz) was the first antibody incorporating XmAb Fc technology to be approved by the
U.S. FDA for commercial marketing. It is approved in the U.S., Europe and Japan for the treatment of adult patients with
paroxysmal nocturnal hemoglobinuria (PNH) and for the treatment of patients with atypical hemolytic uremic syndrome
(aHUS). Ultomiris is commercialized by Alexion Pharmaceuticals, Inc.

In  2013,  we  licensed  Alexion  the  right  to  access  our  Xtend  Fc  domain,  which  Alexion  used  to  develop  an
improved version of Alexion’s commercialized Soliris product. The Xtend technology increased the circulating half-life of
Ultomiris by over three-fold compared to Soliris and extended the dosing schedule to bimonthly for Ultomiris compared to
biweekly for Soliris. During 2020, we received a $10.0 million sales milestone payment and recorded royalty revenue of
$16.2  million.  We  are  eligible  to  receive  an  additional  $20.0  million  in  sales  milestones  and  a  low-single  digit  percent
royalty on the sale of approved products.

Vir Biotechnology, Inc.

In August 2019, we entered into an agreement with Vir Biotechnology, Inc., in which we provided Vir a non-

exclusive license to our Xtend technology for two targets in infectious disease. We received an upfront payment, and we
are eligible to receive total milestones of $155.0 million, including $5.0 million of development milestones, $30.0 million
of regulatory milestones and $120.0 million of sales milestones. We are also eligible to receive royalties on the net sales in
the low single digit percentage range. Vir has advanced two programs under this agreement. VIR-2482 is being evaluated
in a Phase 1/2 study as a universal prophylactic for influenza A, and VIR-3434 is being evaluated in a Phase 1 study as a
potential treatment for patients with hepatitis B virus infection.

In March 2020, we entered into a second agreement in which we provided Vir a non-exclusive license to our

Xtend technology to extend the half-life of novel antibodies Vir is investigating as potential treatments or for patients with
COVID-19. Vir is responsible for all research, development, regulatory and commercial activities for COVID-19
antibodies, and we are eligible to receive royalties on the net sales of approved products in the mid-single digit

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percentage range. Vir is currently conducting Phase 3 studies of VIR-7831 as a potential treatment for the treatment of
COVID-19.

Gilead Sciences, Inc.

In January 2020, we entered into an agreement with Gilead Sciences, Inc., in which we provided Gilead an

exclusive license to our Cytotoxic Fc and Xtend Fc technologies for an initial identified antibody and options for up to
three additional antibodies, all broadly neutralizing anti-HIV antibodies. Gilead has exercised its options for all three
additional antibodies. Gilead is responsible for all development and commercialization activities. During 2020, we received
upfront and option payments of $13.5 million, and for each of four antibodies, we are eligible to receive up to $67.0
million in milestones, which includes $10.0 million in development milestones, $27.0 million in regulatory milestones and
$30.0 million in sales milestones. We are also eligible to receive royalties in the low-single digit percentage range on net
sales of approved products. Gilead has advanced antibodies, including elipovimab (GS-9722) and GS-9723, into clinical
studies.

Omeros Corporation

In August 2020, we entered into an agreement with Omeros Corporation, in which we provided Omeros a non-

exclusive license to our Xtend Fc technology, an exclusive license to apply our Xtend Fc technology to an initial identified
antibody and options to apply our Xtend Fc technology to three additional antibodies. Omeros is responsible for all
development and commercialization activities. We received an upfront payment of $5.0 million, and for each product
incorporating our Xtend Fc technology, we are eligible to receive up to $65.0 million in milestones, which includes $15.0
million in development milestones, $25.0 million in regulatory milestones and $25.0 million in sales milestones. We are
also eligible to receive royalties in the mid-single digit percentage range on net sales of approved products.

Viridian Therapeutics, Inc./MiRagen Therapeutics, Inc.

In December 2020, we entered into an agreement with MiRagen Therapeutics, Inc., in which we provided
MiRagen a non-exclusive license to our Xtend Fc technology and an exclusive license to apply our Xtend Fc technology to
antibodies targeting IGF-1R. MiRagen subsequently changed its name to Viridian Therapeutics, Inc. Viridian is responsible
for all development and commercialization activities. We received an upfront payment of 322,407 shares of Viridian
common stock valued at $6.0 million and are eligible to receive up to $55.0 million in milestones, which include $10.0
million in development milestones, $20.0 million in regulatory milestones and $25.0 million in sales milestones. We are
also eligible to receive royalties in the mid-single digit percentage range on net sales of approved products.

Catabasis Pharmaceuticals, Inc./Quellis Biosciences, Inc.

In May 2018, we entered into an agreement with Quellis Biosciences, Inc., in which we provided Quellis a non-
exclusive license to our Xtend Fc technology to apply to an identified antibody. Quellis is responsible for all development
and commercialization activities. We received an equity interest in Quellis, and in January 2021, upon Quellis merging into
Catabasis Pharmaceuticals, Inc., we received common and preferred shares of Catabasis stock in exchange for our equity in
Quellis. We are eligible to receive up to $66.0 million in milestones, which include $6.0 million in development
milestones, $30.0 million in regulatory milestones and $30.0 million in sales milestones. We are also eligible to receive
royalties in the mid-single digit percentage range on net sales of approved products.

Strategic Collaborations

We enter into strategic collaborations where we can create synergies between our partners' capabilities and assets

and our own protein engineering capabilities, XmAb technologies and XmAb drug candidates. Through these arrangements
we seek to create new drug candidates, investigate novel combination therapies and potentially identify additional
indications for our portfolio of XmAb drug candidates.

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MorphoSys AG

In November 2020, we entered into an agreement with MorphoSys AG to conduct clinical studies to investigate
the combination of plamotamab and tafasitamab in combination with lenalidomide in patients with relapsed or refractory
diffuse large B-cell lymphoma (DLBCL), first-line DLBCL, and relapsed or refractory follicular lymphoma (FL).
MorphoSys and Incyte Corporation will provide tafasitamab for the studies, which Xencor will sponsor and fund. We plan
to initiate a Phase 1/2 study evaluating the combination in patients with relapsed or refractory DLBCL in the second half of
2021.

Atreca, Inc.

In July 2020, we entered into an agreement with Atreca, Inc., to research, develop and commercialize novel CD3

bispecific antibodies as potential therapeutics in oncology. During a three-year research term, Atreca will provide
antibodies against novel tumor targets through its discovery platform from which we will engineer XmAb bispecific
antibodies that bind to the CD3 receptor on T cells. The two companies will share research costs equally during the
research term. Up to two joint programs are eligible to be mutually selected for further development and
commercialization, with each partner sharing 50% of costs and profits. Each company has the option to lead development,
regulatory and commercialization activities for one of the joint programs. In addition, each partner has the option to pursue
up to two programs independently, with a royalty in the mid- to high-single digit percentage range payable on net sales to
the other partner.

The University of Texas MD Anderson Cancer Center

In September 2020, we entered into an agreement with MD Anderson, in which we will provide funding over a

five-year period, and MD Anderson will collaborate to design and execute additional clinical studies with our portfolio of
XmAb drug candidates, including novel bispecific antibody and cytokine candidates. We own all rights to the programs
and results generated from these studies.

In December 2020, we entered into a second agreement with MD Anderson to develop novel CD3 bispecific

antibody therapeutics for the potential treatment of patients with cancer. MD Anderson will work to identify and develop
potential antibodies, and we will apply its our Fc bispecific technology to create therapeutic candidates. MD Anderson will
then conduct and fund all preclinical activities to advance candidates toward clinical studies. We have certain exclusive
options to license worldwide rights to develop and commercialize potential new medicines arising from the collaboration.

Our Research and Development Pipeline

We have used our XmAb Fc platforms and protein engineering capabilities to produce a growing pipeline of drug

candidates in clinical and preclinical development. These include multiple oncology candidates using our bispecific Fc
domain, including bispecific antibody and cytokine candidates. We continue to advance these candidates as additional
options for clinical development by us or as out-licensing opportunities. We also from time to time in-license antibody
technologies and compounds from other companies which we believe may allow us to create potential product candidates
by incorporating our XmAb technology. These licenses may require us to pay upfront fees, development and commercial
milestone payments, and if commercial products are approved, royalties on net sales.

Human Capital Management

Our Employees and Commitment to Diversity, Equity, and Inclusion

Our ability to develop XmAb technologies, advance our programs into late-stage development, position our

programs for commercialization and identify successful business partnerships is dependent on attracting, retaining, and
developing our employees. We seek and support a diverse population of employees without regard to race, gender or sexual
orientation. As of December 31, 2020, we had 202 full-time employees, representing a 22% increase in our employee
workforce as compared to December 31, 2019. Of these, 156 were engaged in research and development

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activities, and 46 are engaged in business development, information systems, facilities, human resources or administrative
support. Of these employees, 42 hold Ph.D. degrees, and 6 hold M.D. degrees. None of our employees are represented by
any collective bargaining unit. We believe we maintain good relations with our employees.

We are an equal opportunity employer and maintain policies that prohibit unlawful discrimination based on race,
color, religion, gender, sexual orientation, gender identity/expression, national origin/ancestry, age, disability, marital and
veteran status. We are proud to employ a diverse workforce that, as December 31, 2020, was 53% non-white and 55%
women. In addition, as of December 31, 2020, women made up 22% of our senior leadership team. We strive to build and
nurture a culture where all employees feel empowered to be their authentic selves.

We seek to provide human capital policies that provide for the health, safety and welfare of our employees as well
as professional development and training. In 2020 in connection with the ongoing pandemic we implemented the following
policies:

● Instituted a remote work mandate for all non-laboratory staff and provided technical support and training to

enable employees to continue to perform their responsibilities while working remotely;

● Implemented onsite safety procedures for all laboratory staff which includes mandatory weekly onsite SARS-
CoV-2 virus testing for all laboratory employees and their household members, reimbursement of 100% of
medical insurance costs for all onsite employees, and fully paid time off for any employee that missed time due
to the COVID-19 virus including for the care of family members; and

● Provided additional compensation for onsite employees and provided additional days off for all employees.

We provide compensation packages designed to attract and retain high-quality employees, and all of our
employees are eligible for cash bonuses and grants of equity awards. We regularly evaluate our compensation programs
with an independent compensation consultant and utilize industry benchmarking in an effort to ensure they are competitive
compared to similar biotechnology and biopharmaceutical companies with which we compete for talent and that they are
fair and equitable across our workforce with respect to gender, race, and other personal characteristics. In addition, we
provide a variety of programs and services to help employees meet and balance their needs at work, at home and in life,
including an attractive mix of healthcare, insurance, and other benefit plans. We deliver a benefits program that is designed
to keep our employees and their families healthy, which includes not only medical, dental and vision benefits, but also
dependent care, mental health, and other wellness benefits.

● We also value career development for all employees, and we provide reimbursement and time for employees to
attend professional development courses ranging from technical training, competency-based workshops and
leadership development programs facilitated by external partners who are experts in their respective fields.
Direct managers also take an active role in identifying individualized development plans to assist their
employees in realizing their full potential and creating opportunities for promotions and added responsibilities
that enhance the engagement and retention of our workforce.

Market Opportunity

Our drug candidates that use the XmAb bispecific Fc domain, including plamotamab, XmAb717, vibecotamab,

tidutamab, XmAb841, XmAb104 and XmAb306: We are developing our bispecific antibody and cytokine candidates to
treat cancer. Cancer is a broad group of diseases in which cells divide and grow in an uncontrolled fashion, forming
malignancies that can invade other parts of the body, and it is the second leading cause of death in the United States (U.S.).
The American Cancer Society estimates that in 2021 there will be approximately 1.9 million new cases of cancer and
approximately 608,570 deaths from cancer. The National Institutes of Health (NIH) estimated that based on growth and
aging of the U.S. population, medical expenditures for cancer in the year 2020 were projected to reach at least $158.0
billion (in 2010 dollars).

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Intellectual Property

The foundation for our XmAb technology and our product candidates and partnering is the generation and

protection of intellectual property for novel antibody and cytokine therapeutics. We combine proprietary computational
methods for amino acid sequence design with laboratory generation and testing of new antibody and cytokine
compositions. Our design and engineering team prospectively assesses, with patent counsel, the competitive landscape with
the goal of building broad patent positions and avoiding third-party intellectual property.

As a pioneer in Fc domain engineering, we systematically scanned the structure of the Fc domain to discover Fc
variants. We have filed patent applications relating to thousands of specific Fc domain variants with experimental data on
specific improvements of immune function, pharmacokinetics, structural stability, and novel structural constructs. We have
filed additional patent applications derived from these applications as we discover new properties of the Fc variants and as
new business opportunities arise. We continually seek to expand the intellectual property coverage of our technology and
candidates and invest in discovering new Fc domain technologies, antibody product candidates, and cytokine product
candidates.

Our patent estate, on a worldwide basis, includes over 1,000 issued patents and pending patent applications which

we own, with claims directed to XmAb Fc domains, all of our clinical and preclinical stage product candidates and our
computational protein design methods and platforms. We also have a large number of issued patents and pending patent
applications with claims directed specifically to our XmAb technology and candidates.

The patent expiration in the U.S. and major foreign countries (ex-U.S.) for our key technologies and drug
candidates is set forth below. We have pending applications filed that may extend the exclusivity of some of our technology
and products:

Technology
Cytotoxic
Immune Inhibitor
Xtend
Bispecific
CD3 T Cell Engagers
CD28 T Cell Engagers

Company Products
Obexelimab (XmAb5871)
Plamotamab
Vibecotamab
Tidutamab
XmAb717, XmAb841, XmAb104
XmAb564
XmAb819
XmAb306

Partnered Products
Monjuvi (tafasitamab)
Ultomiris
AIMab7195 (XmAb7195)

Patent Expiry
2025 U.S.; 2024 Ex-U.S.
2028 U.S.; 2025 Ex-U.S.
2025 U.S.; 2028 Ex-U.S.
2034 U.S. and Ex-U.S.
2035 U.S. and Ex-U.S.
2040 U.S. and Ex-U.S.

Patent Expiry
2029 U.S.; 2028 Ex-U.S.
2035 U.S. and Ex-U.S.
2035 U.S.; 2036 Ex-U.S.
2037 U.S. and Ex-U.S.
2037 U.S. and Ex-U.S.
2038 U.S. and Ex-U.S.
2040 U.S. and Ex-U.S.
2038 U.S.; 2037 Ex-U.S.

Patent Expiry
2029 U.S.; 2027 Ex-U.S.
2025 U.S.; 2028 Ex-U.S.
2029 U.S. and Ex-U.S.

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The Hatch-Waxman Act permits a patent term extension for FDA-approved drugs, including biological products,

of up to five years beyond the expiration of the patent. The length of the patent term extension is related to the length of
time the drug is under regulatory review. Patent extension cannot extend the remaining term of a patent beyond a total of
14 years from the date of product approval and only one patent applicable to an approved drug may be extended. Similar
provisions are available in Europe and other jurisdictions to extend the term of a patent that covers an approved drug. In the
future, if and when our pharmaceutical product candidates receive FDA approval, we expect to apply for patent term
extensions on patents covering those products. We intend to seek patent term extensions to any of our issued patents in any
jurisdiction where these are available, however there is no guarantee that the applicable authorities, including the FDA in
the United States, will agree with our assessment of whether such extensions should be granted, and even if granted, the
length of such extensions.

The Patient Protection and Affordable Care Act, as amended by the Healthcare and Education Affordability

Reconciliation Act (collectively the ACA) created a regulatory scheme authorizing the FDA to approve biosimilars via an
abbreviated licensure pathway. In many cases, this allows biosimilars to be brought to market without conducting the full
suite of clinical trials typically required of originators. Under the ACA, a manufacturer may submit an application for
licensure of a biologic product that is "biosimilar to" or "interchangeable with" a previously approved biological product or
"reference product." The "biosimilar" application must include specific information demonstrating biosimilarity based on
data derived from: (1) analytical studies, (2) animal studies, and (3) a clinical study or studies that are sufficient to
demonstrate safety, purity, and potency in one or more appropriate conditions of use for which the reference product is
licensed, except that FDA may waive some of these requirements for a given application. Under this new statutory scheme,
an application for a biosimilar product may not be submitted to the FDA until four years after the date of first licensure.
The FDA may not approve a biosimilar product until 12 years from the date on which the reference product was first
licensed. The law does not change the duration of patents granted on biological products. Even if a product is considered to
be a reference product eligible for exclusivity, another company could market a competing version of that product if the
FDA approves a full Biologics License Application (BLA) for such 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.
There have been recent proposals to repeal or modify the ACA and it is uncertain how any of those proposals, if approved,
would affect these provisions.

In addition to patent protection, we rely on trade secret protection and know-how to expand our proprietary
position around our technology and other discoveries and inventions that we consider important to our business. We seek to
protect this intellectual property in part by entering into confidentiality agreements with our employees, consultants,
scientific advisors, clinical investigators, and other contractors and also by requiring our employees, commercial
contractors, and certain consultants and investigators, to enter into invention assignment agreements that grant us
ownership of certain discoveries or inventions made by them.

Further, we seek trademark protection in the United States and in certain other jurisdictions where available and
when we deem appropriate. We have obtained registrations for the Xencor trademark, as well as certain other trademarks,
which we use in connection with our pharmaceutical research and development services and our clinical-stage products,
including XmAb, PDA, Protein Design Automation, Proteins By Design and Antibodies By Design. We currently have
registrations for Xencor and PDA in the United States, Australia, Canada, the European Community, and Japan, for Protein
Design Automation in the United States, Australia, Canada and the European Community, and for XmAb in the United
States, Australia, Canada, the European Community and Japan.

Third Party Vendors and Suppliers

Our internal research activities are focused on early research stage and preclinical activities and studies. We rely
on third party vendors, suppliers and contractors for all other research, development and clinical activities. We are able to
internally manufacture the quantities of our product candidates required for relatively short preclinical animal studies. We
believe that this allows us to accelerate the drug development process by not relying on third parties for all of our
manufacturing needs. We have adopted a manufacturing strategy of contracting with third parties in accordance with
current good manufacturing practices (cGMPs) for the manufacture of drug substance and product, including our pipeline
of bispecific antibody and cytokine development candidates and also our obexelimab development candidate. We have
used third party manufacturers for all our bispecific antibody and cytokine candidates which include:

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vibecotamab, plamotamab, tidutamab, XmAb717, XmAb841, XmAb104, XmAb306, and XmAb564. Additional contract
manufacturers are used to fill, label, package and distribute investigational drug products. This allows us to maintain a
more flexible infrastructure while focusing our expertise on developing our products. Obexelimab is produced by
mammalian cell culture of a Chinese hamster ovary cell line that expresses the antibody, followed by multiple purification
and filtration steps typical of those used for monoclonal antibodies. We do not have any long-term manufacturing
agreements in place and will ultimately depend on contract manufacturers for the manufacture of our products for
commercial sale, as well as for process development. We have successfully completed clinical trials with subcutaneous
formulations for obexelimab which have been manufactured with third party contract manufacturers. In February 2020, we
entered into a License, Development and Commercialization Agreement for XmAb7195 (Aimmune Agreement) with
Aimmune Therapeutics, Inc. (Aimmune). Under the Aimmune Agreement, Aimmune will assume all future manufacturing
of XmAb7195.

 KBI Biopharma, Inc.

In July 2014, we entered into a master services agreement (KBI Agreement) with KBI Biopharma, Inc. (KBI). We

have engaged KBI under the KBI Agreement for process development, clinical scale-up, analytical method development,
formulation development, and other services related to drug substance and drug product for our bispecific antibody and
cytokine development candidates: vibecotamab, plamotamab, tidutamab, XmAb717, XmAb841, XmAb104, XmAb306,
and XmAb564 in accordance with cGMP regulations. For each bispecific program, we have entered into a separate
agreement with the terms and conditions of services and payment. The KBI Agreement is for a three-year term but is
automatically extended on an annual basis until the services are completed. The KBI Agreement may be terminated by
either party for a breach that is not remedied within 30 days after notice or 60 days after notice of the existence of an
incurable scientific or technical issue that renders KBI unable to render services under the KBI Agreement, by after 60-day
notice, or in the event of a bankruptcy of a party. For termination other than a material breach by KBI, we must pay for all
services conducted prior to the termination and to wind down the activities.

 Cell Line Agreements with Selexis

In December 2015, we entered into a master service agreement (Selexis Agreement) with Selexis SA (Selexis) for
the manufacture of Selexis cell lines. Under the terms of the Selexis Agreement, Selexis will manufacture cell lines for the
antibody candidates provided by us and upon completion of the cell lines, we have the option to take an unrestricted
commercial license to the cell line. The terms of each commercial license require us to make payments upon achievement
of certain development and regulatory milestones and we will also pay royalties based on a percentage of net sales for
products that are derived from or utilize the Selexis cell line. The royalty is less than 1%.

Selexis has manufactured cell lines for all our bispecific antibody and cytokine drug candidates, and we currently

have commercial licenses to the Selexis cell line for the following bispecific antibody and cytokine candidates:
vibecotamab, plamotamab, tidutamab, XmAb717, XmAb841, XmAb104, XmAb306 and XmAb564.

 License Agreements with BIO-TECHNE 

In February 2015, we entered into a license agreement with BIO-TECHNE Corporation (BIO-TECHNE) for a

non-exclusive license to certain antibody technology including monoclonal antibodies which recognize human
somatostatin receptor 2 (SSTR2). The variable domain of this antibody is incorporated in our tidutamab drug candidate.
Under the terms of this agreement, we made an upfront payment and are obligated to make payments upon the achievement
of certain development and regulatory milestones, and royalties based on a percentage of net sales from products that are
derived from the tidutamab program. The royalty is less than 1%.

We entered into a second agreement with BIO-TECHNE effective February 2018 for a non-exclusive license to a

certain recombinant monoclonal antibody reactive with human programmed death protein, PD-1 antibody. We expect to
use this protein in certain of our oncology drug candidates. Under the terms of this agreement, we made an upfront
payment and are obligated to make payments upon the achievement of certain development, regulatory and sales
milestones, and royalties based on a percentage of net sales from products that are derived from the PD-1 antibody. The
royalty is 1%.

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Umbrella Development Services Agreement with Patheon Biologics LLC

In September 2018, we entered into an Umbrella Development Services Agreement (Patheon Agreement) with

Patheon Biologics LLC (Patheon). Under the terms of the Patheon Agreement, any of the affiliates within the global
network of service sites in Thermo Fisher Scientific Inc.’s Pharma Services Group may perform clinical manufacturing and
development services for us in accordance with cGMP regulations. The Patheon Agreement includes a statement of work
for Patheon to provide process transfer, process development and cGMP manufacturing to support our obexelimab
program. The Patheon Agreement may be terminated by either party for a breach or default that is not remedied within 30
days, or such other time period as may be reasonably necessary to remedy such breach after receiving notice of the breach
from the non-breaching party or if the other party is subject to an insolvency event. We have the unilateral right to
terminate the Patheon Agreement upon 30 days written notice to Patheon for any business reason, subject to cancellation
fees. Patheon has the unilateral right to terminate the Patheon Agreement if we request to reschedule work beyond 120
days, the project work is not progressing according to our expectations and we cannot agree on appropriate changes, after
six months of inactivity on a project at our request or if Patheon determines it is unable to perform its obligations in a safe
and effective way in compliance with applicable regulatory requirements.

Patheon is currently conducting process transfer, process development and cGMP manufacturing for our

obexelimab program and process development and cGMP manufacturing for our XmAb819 program.

Competition

We compete in an industry that is characterized by rapidly advancing technologies, intense competition, and a

strong emphasis on proprietary products. Our competitors include pharmaceutical companies, biotechnology companies,
academic institutions, and other research organizations. We compete with these parties for promising targets for antibody-
based therapeutics, new technology for optimizing antibodies and cytokines, and in recruiting highly qualified personnel.
Many competitors and potential competitors have substantially greater scientific, research, and product development
capabilities as well as greater financial, marketing and sales, and human resources than we do. In addition, many
specialized biotechnology firms have formed collaborations with large, established companies to support the research,
development, and commercialization of products that may be competitive with ours. Accordingly, our competitors may be
more successful than we may be in developing, commercializing, and achieving widespread market acceptance. In
addition, our competitors’ products may be more effective, more effectively developed, or more effectively marketed and
sold than any treatment we or our development partners may commercialize, which may render our product candidates
obsolete or noncompetitive before we can recover the expenses related to developing and commercializing any of our
product candidates.

Competition in the field of cancer drug development is intense, with hundreds of compounds in clinical trials.
Many large pharmaceutical companies and other smaller biotechnology companies are developing competing bispecific
antibody platforms, and many of these companies have advanced multiple drug candidates into clinical development,
including Amgen Inc.; Genmab A/S; Macrogenics, Inc.; Merus N.V.; Regeneron Pharmaceuticals, Inc.; Roche Holding
AG; and Zymeworks Inc.

We are developing bispecific antibody drug candidates engineered to direct cytotoxic T cell killing of tumor cells,

by engaging the CD3 receptor on T cells and an antigen on tumor cells. Regarding plamotamab, other companies
developing CD3 bispecific antibodies directed to CD20, an antigen expressed on many blood tumors, include AbbVie Inc.
and Genmab A/S; IGM Biosciences, Inc.; Regeneron Pharmaceuticals, Inc.; and Roche Holding AG. Other antibodies,
antibody drug candidates and cell therapies are in development or approved to treat patients with non-Hodgkin lymphomas.
Regarding vibecotamab, other companies developing CD3 bispecific antibodies directed to CD123, an antigen expressed
on myeloid tumors, include Aptevo Therapeutics Inc. and Macrogenics, Inc.

We are also developing several bispecific antibody drug candidates engineered to selectively engage the immune

system in order to treat patients with cancer, such as XmAb717, XmAb841 and XmAb104. Immuno-oncology is a
competitive field within the biotechnology and pharmaceutical industries, and most large pharmaceutical companies are
developing drug candidates, have marketed medicines in this space, or both: AstraZeneca plc; Bristol-Myers Squibb
Company; GlaxoSmithKline plc; Merck & Co., Inc.; Novartis AG; Pfizer Inc.; Roche Holding AG; and Sanofi S.A.

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While tuning the binding affinities plays a crucial role in designing the mechanism of action for this class of bispecific
antibody, smaller companies advancing clinical programs that, like XmAb717, dually target the immune checkpoint
receptors PD-1 and CTLA-4 include Akeso, Inc. and Macrogenics, Inc.

Several companies are developing engineered cytokines intended to activate specific immune cell populations in

order to treat patients with cancer and/or autoimmune diseases, including Alkermes plc; Amgen Inc.; Cue Biopharma, Inc.;
Cytune Pharma; Eli Lilly and Company; IGM Biosciences, Inc.; ImmunityBio, Inc.; Kadmon Holdings, Inc.; Medicenna
Therapeutics Corp.; Nektar Therapeutics, Inc.; Neoleukin Therapeutics, Inc.; Novartis AG; Pandion Therapeutics, Inc.;
Roche Holding AG; Sanofi S.A.; Sutro Biopharma, Inc.; and Xilio Therapeutics, Inc.

In addition, we are aware of a number of other companies with development stage programs that may compete

with the drug candidates we and our licensees are developing in the future. We anticipate that we will face intense and
increasing competition as new treatments enter the market and advanced technologies become available.

Regulatory Overview

Our business and operations are subject to a variety of U.S. federal, state and local and foreign supranational,

national, provincial and municipal laws, regulations and trade practices. The FDA and comparable regulatory authorities in
state and local jurisdictions and in other countries impose substantial and burdensome requirements upon companies
involved in the clinical development, manufacture, marketing, and distribution of drugs and biologics. These agencies and
other federal, state and local entities regulate research and development activities and the testing, manufacture, quality
control, safety, effectiveness, labeling, storage, recordkeeping, approval, advertising and promotion, and export and import
of our product candidates.

U.S. Government Regulation

We are subject to extensive regulation by the U.S. and other countries. Regulation by government authorities is a

significant factor in the development, manufacture, distribution and ongoing research activities. All our products in
development will require regulatory approval by government agencies prior to commercialization. In particular, drugs and
biologic products are subject to rigorous preclinical studies and clinical trials and other approval procedures of the FDA
and similar regulatory authorities in foreign countries. The process of obtaining these approvals and the subsequent
compliance with appropriate federal and state statutes and regulations require the expenditure of substantial time and
financial resources. Various federal and state statutes and regulation also govern or influence testing, manufacturing, safety,
labeling, storage, tracking, tracing and record-keeping of drugs and biologic products and their marketing.

U.S. Drug Development Process

In the United States, the FDA regulates drugs and biologic products under the Federal Food, Drug and Cosmetic

Act (FDCA), its implementing regulations, and other laws including, in the case of biologics, the Public Health Service
Act. Our product candidates are subject to regulation by the FDA as a biologic. Biologics require the submission of a BLA
to the FDA and approval of the BLA by the FDA before marketing in the United States. The process of obtaining
regulatory approvals for commercial sale and distribution and the subsequent compliance with applicable federal, state,
local and foreign statutes and regulations require the expenditure of substantial time and financial resources. Failure to
comply with the applicable requirements at any time during the product development process, approval process or after
approval, may subject an applicant to administrative or judicial civil or criminal sanctions. These sanctions could include
the FDA’s refusal to approve pending applications, license suspension or revocation, withdrawal of an approval, imposition
of a clinical hold on clinical trials, warning letters, product recalls, product seizures, total or partial suspension of
production, or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement or civil and/or
criminal penalties. The process required by the FDA before a biologic may be marketed in the United States generally
involves the following:

1.

completion of preclinical laboratory tests, animal studies, and formulation studies performed in accordance
with the FDA’s current Good Laboratory Practices (GLP) regulations;

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2.

3.

4.

5.

6.

7.

submission to and acceptance by the FDA of an IND which must become effective before human clinical
trials in the United States may begin;

performance of adequate and well-controlled human clinical trials in accordance with the FDA’s current good
clinical practices (GCP) regulations to establish the safety and efficacy of the product candidate for its
intended use;

submission to and acceptance by the FDA of a BLA;

satisfactory completion of an FDA inspection (if the FDA deems it as a requirement) of the manufacturing
facility or facilities where the product is produced to assess compliance with the FDA’s cGMP regulations to
assure that the facilities, methods, and controls are adequate to preserve the product’s identity, strength,
quality, and purity;

potential audits by the FDA of the nonclinical and clinical trial sites that generated the data in support of the
BLA;

potential review of the BLA by an external Advisory Committee to the FDA, whose recommendations are
not binding on the FDA; and

8. FDA review and approval of the BLA prior to any commercial marketing or sale.

Before testing any compounds with potential therapeutic value in humans, the product candidate enters the
preclinical testing stage. Preclinical tests include laboratory evaluations of product chemistry, stability, and formulation, as
well as animal studies to assess the potential toxicity and activity of the product candidate. Clinical trials involve the
administration of the product candidate to human patients under the supervision of qualified investigators, generally
physicians not employed by or under the clinical trial sponsor’s control. Clinical trials are conducted under protocols
detailing, among other things, the objectives of the clinical trial, dosing procedures, subject selection and exclusion criteria,
and the parameters to be used to monitor subject safety and effectiveness. The FDA or responsible Institutional Review
Board may place a trial on hold at any time related to perceived risks to patient safety. Phases of clinical development
include:

1. Phase 1. The product candidate is initially introduced into a limited population of healthy human subjects, or
in some cases, patients with the disease for which the drug candidate is intended, and tested for safety, dosage
tolerance, absorption, metabolism, distribution, and excretion. In the case of some products for some
diseases, or when the product may be too inherently toxic to ethically administer to healthy volunteers, the
initial human testing is often conducted in patients with the disease or condition for which the product
candidate is intended to gain an early indication of its effectiveness.

2. Phase 2. The product candidate is evaluated in a limited patient population (but larger than in Phase 1) to
identify possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the product for
specific targeted indications, and to assess dosage tolerance, optimal dosage, and dosing schedule.

3. Phase 3. Clinical trials are undertaken to further evaluate dosage and provide substantial evidence of clinical
efficacy and safety in an expanded patient population (such as several hundred to several thousand) at
geographically dispersed clinical trial sites. Phase 3 clinical trials are intended to establish the overall
risk/benefit ratio of the product and provide an adequate basis for product labeling. Generally, two adequate
and well-controlled Phase 3 clinical trials are required by the FDA for approval of a BLA.

4. Post Approval. Clinical trials or other post-approval commitments may be conducted after initial marketing
approval. These studies are used to gain additional experience from the treatment of patients in the intended
therapeutic indication and may be required by the FDA as a condition of approval.

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Concurrent with clinical trials, companies usually complete additional animal studies and must also develop

additional information about the chemistry and physical characteristics of the biologic and finalize a process for
manufacturing the product in commercial quantities in accordance with cGMP requirements.

U.S. Review and Approval Processes

The results of product development, preclinical studies and clinical trials, along with descriptions of the
manufacturing process, analytical tests, proposed labeling, and other relevant information are submitted to the FDA in the
form of a BLA requesting approval to market the product for one or more specified indications. The standard time for the
FDA to accept a BLA submission is two months.

If the FDA determines that the BLA is substantially complete, it will accept the BLA for review.

Once accepted, the FDA reviews the BLA to determine, among other things, whether the proposed product is safe

and effective for its intended use, and whether the product is being manufactured in accordance with cGMP to assure and
preserve the product’s identity, strength, quality, and purity, and it may inspect the manufacturing facilities to assure cGMP
compliance and clinical sites used during the clinical trials to assure cGMP compliance. The standard FDA review process
is 10 months once a BLA is accepted for review, but it can take longer. During the review process, the FDA also will
determine whether a risk evaluation and mitigation strategy (REMS) is necessary to assure the safe use of the product. If
the FDA concludes a REMS is needed, the sponsor of the BLA must submit a proposed REMS prior to approval. A REMS
can substantially increase the costs of obtaining approval. In addition, under the Pediatric Research Equity Act, a BLA or
supplement to a BLA must contain data that are adequate to assess the safety and effectiveness of the product for the
claimed indications in all relevant pediatric subpopulations, and to support dosing and administration for each pediatric
subpopulation for which the product is safe and effective. The FDA may, on its own initiative or at the request of the
applicant, grant deferrals for submission of some or all pediatric data until after approval of the product for use in adults, or
full or partial waivers from the pediatric data requirements.

The FDA will issue a complete response letter describing deficiencies in the BLA and recommend actions if the

agency decides not to approve the BLA. The applicant will have to address all of the deficiencies which could take
substantial time to address.

If the product receives regulatory approval, the approval may be significantly limited to specific diseases and

dosages, or the indications for use may otherwise be limited and may require that certain contraindications, warnings, or
precautions be included in the product labeling. In addition, the FDA may require post marketing studies, sometimes
referred to as Phase 4 testing, which involves clinical trials designed to further assess drug safety and effectiveness and
may require testing and surveillance programs to monitor the safety of approved products that have been commercialized.

Post-Approval Requirements

Any biologic products for which we or our collaborators receive FDA approvals are subject to continuing
regulation by the FDA, including, among other things, cGMP compliance for product manufacture, record-keeping
requirements, reporting of adverse experiences with the product, providing the FDA with updated safety and efficacy
information, product sampling and distribution requirements, complying with certain electronic records and signature
requirements, and complying with FDA promotion and advertising requirements, which include, among others, restrictions
on direct-to-consumer advertising, promoting biologics for uses or in patient populations that are not described in the
product’s approved labeling (known as “off-label use”), industry-sponsored scientific and educational activities, and
promotional activities involving the internet. Failure to comply with these or other FDA requirements can subject a
manufacturer to possible legal or regulatory action, such as product reclass, warning letters, suspension of manufacturing,
seizure of product, injunctive action, mandated corrective advertising or communications with healthcare professionals,
possible civil or criminal penalties, or other negative consequences, including adverse publicity.

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U.S. Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration and specifics of the FDA approval of any of our biologic product candidates,

we may apply for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of
1984, commonly referred to as the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a patent
restoration term of up to five years for one patent per product as compensation for patent term lost during product
development and the FDA regulatory review process of that product. The U.S. Patent and Trademark Office, in
consultation with the FDA, reviews and approves the application for any patent term extension or restoration.

Market exclusivity provisions under the FDCA can also delay the submission or the approval of certain

applications of other companies seeking to reference another company’s BLA. Specifically, the Biologics Price
Competition and Innovation Act established an abbreviated pathway for the approval of biosimilar and interchangeable
biological products generally not earlier than 12 years after the original BLA approval. The 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 their similarity to existing brand product.

Pharmaceutical Coverage, Pricing and Reimbursement

The cost of pharmaceuticals continues to generate substantial governmental and third-party payor interest. We

expect that the pharmaceutical industry will experience pricing pressures due to the trend toward managed healthcare, the
increasing influence of managed care organizations and additional legislative proposals.

Healthcare Reform

In the United States and foreign jurisdictions, there have been and will continue to be a number of legislative and

regulatory proposals to change the healthcare system in ways that could affect our ability to sell our product candidates
profitably, once they are approved for sale. Among policy makers and payors in the United States and elsewhere, there is
significant interest in promoting changes in healthcare systems with the stated goals of containing healthcare costs,
improving quality and/or expanding access. In the United States, the pharmaceutical industry has been a particular focus of
these efforts and has been significantly affected by major legislative initiatives.

Other Healthcare Laws and Compliance Requirements

In the United States, the research, manufacturing, distribution, sale and promotion of drug products and medical

devices are potentially 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 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.

Europe / Rest of World Government Regulation

In addition to regulations in the United States, we, and our collaborators, will be subject to a variety of regulations
in other jurisdictions governing, among other things, clinical trials and any commercial sales, marketing and distribution of
our products, similar or more stringent than the U.S. laws.

Whether or not we, or our collaborators, obtain FDA approval for a product, we must obtain the requisite
approvals from regulatory authorities in foreign countries prior to the commencement of clinical trials or marketing of the
product in those countries. The requirements and process governing the conduct of clinical trials, product licensing, pricing
and reimbursement vary from country to country. In addition, we and our collaborators may be subject to foreign laws and
regulations and other compliance requirements, including, without limitation, anti-kickback laws, false claims laws and 
other fraud and abuse laws, as well as laws and regulations requiring transparency of pricing and marketing information 
and governing the privacy and security of health information, such as the European Union’s Directive 95/46  on the 
Protection of Individuals with regard to the Processing of Personal Data.

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If we, or our collaborators, fail to comply with applicable foreign regulatory requirements, we may be subject to,

among other things, fines, suspension or withdrawal of regulatory approvals, product recalls, seizure of products, operating
restrictions and criminal prosecution.

Corporate Information

We were incorporated in California in August 1997 under the name Xencor. In September 2004, we

reincorporated in the state of Delaware under the name Xencor, Inc. Our principal offices are located at 111 West Lemon
Avenue, Monrovia, CA 91016, and our telephone number is (626) 305-5900. Our website address is www.xencor.com. Our
website and the information contained on, or that can be accessed through, the website will not be deemed to be
incorporated by reference in and are not considered part of this Annual Report. Our Annual Reports on Form 10-K,
Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed or furnished pursuant to
Section 13(a) and 15(d) of the Securities Exchange Act of 1934, as amended, are available free of charge on the Investor
Relations portion of our web site at www.xencor.com as soon as reasonably practical after we electronically file such
material with, or furnish it to, the Securities and Exchange Commission (SEC). The SEC maintains an internet site that
contains reports, proxy and information statements, and other information regarding issuers that file electronically with the
SEC and state the address of that site (www.sec.gov).

Item 1A.  Risk Factors.

Summary of Risk Factors

We are subject to a number of risks that if realized could materially harm our business, prospects, operating results, and
financial  condition.  Some  of  the  more  significant  risks  and  uncertainties  we  face  include  those  summarized  below.  The
summary below is not exhaustive and is qualified by reference to the full set of risk factors set forth in this “Risk Factors”
section. Please carefully consider all of the information in this Form 10-K, including the full set of risks set forth in this 
“Risk  Factors”  section,  and  in  our  other  filings  with  the  U.S.  Securities  and  Exchange  Commission  before  making  an
investment decision regarding Xencor.

We have reviewed our risk factors and categorized them into five specific categories:

1. Risks related to our unique and specific business operations as a small biotechnology company. These risks

include:

● Our success depends on our ability to use and expand our XmAb technology platform to build a pipeline of
product candidates and develop marketable products. We cannot be certain our candidates will receive
regulatory approval or be successfully commercialized.

● The clinical development stage of our operations may make it difficult for you to evaluate the success of

our business to date and to assess our future viability.

● The COVID-19 pandemic and the future outbreak of other highly infectious or contagious diseases could
materially and adversely impact or disrupt our business and our financial condition, results of operations,
cash flows and performance.

2. Risks specifically related to our financial position, capital requirements and ownership of our common stock.

These risks include:

● We have incurred significant losses since our inception and anticipate that we will continue to incur

significant losses for the foreseeable future.

● Biopharmaceutical product development is a highly speculative undertaking and involves a substantial
degree of uncertainty. We have never generated any revenue from product sales and may never be
profitable.

● We will require additional financing and may be unable to raise sufficient capital, which could lead us to

delay, reduce or abandon research and development programs or commercialization.

● The market price of our common stock is likely to be highly volatile, and you could lose all or part of

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your investment.

● Our principal stockholders, directors and management own a significant percentage of our stock and will

be able to exert significant control over matters subject to stockholder approval.

● Raising additional funds through debt or equity financing may be dilutive or restrict our operations and

raising funds through licensing may require us to relinquish rights to our technology or product candidates.
● Future sales and issuances of our common stock or rights to purchase common stock, including pursuant to

our equity incentive plans, could result in additional dilution of the percentage ownership of our
stockholders and could cause our stock price to fall.

3. Risks related to our intellectual property. These risks include:

● If we are unable to obtain, maintain and enforce intellectual property protection covering our products,
others may be able to make, use or sell products substantially the same as ours, which could adversely
affect our ability to compete in the market.

● We have in-licensed, and may in the future in-license, a portion of our intellectual property, and, if we fail
to comply with our obligations under these arrangements, we could lose such intellectual property rights or
owe damages to the licensor of such intellectual property.

● We may be required to reduce the scope of our intellectual property due to third party intellectual property

claims.

● Our products could infringe patents and other property rights of others, which may result in costly

litigation and, if we are not successful, could cause us to pay substantial damages or limit our ability to
commercialize our products, which could have a material adverse effect on our business.

● If we are not able to prevent disclosure of our trade secrets and other proprietary information, the value of

our technology and products could be significantly diminished.

● If we do not obtain patent term extension and data exclusivity for any therapeutic candidates we develop,

our business may be materially harmed.

4. Risks related to our dependence on third parties. These risks include:

● Our patent protection and prosecution for some of our product candidates is dependent on third parties.
● We rely on third party manufacturers for the manufacture of our XmAb engineered antibodies. This entails
a complex process and manufacturers often encounter difficulties in production. If we, or any of our third-
party manufacturers, encounter any loss of our master cell banks or if any of our third party manufacturers
otherwise fail to comply with their contractual obligations, the development or commercialization of our
product candidates could be delayed or stopped.

● Our existing partnerships are important to our business, and future partnerships may also be important to
us. If we are unable to maintain any of these partnerships, or if these partnerships are not successful, our
business could be adversely affected.

● We rely upon third party contractors, and service providers for the execution of most aspects of our

development programs. Failure of these collaborators to provide services of a suitable quality and within
acceptable timeframes may cause the delay or failure of our development programs.

● We rely on third parties to manufacture supplies of our preclinical and clinical product candidates. The

development of such candidates could be stopped or delayed if any such third party fails to provide us with
sufficient quantities of product or fails to do so at acceptable quality levels or prices or fails to maintain or
achieve satisfactory regulatory compliance.

5. Risks related to our industry. These risks include:

● Clinical trials are expensive and take years to conduct, and the outcome of such clinical trials is uncertain.
Clinical trials may fail to prove our product candidates are safe and effective. This could lead to delays,
downsizing or termination of clinical development plans for any our product candidates.

● Adverse side effects or other safety risks associated with our product candidates could delay or preclude

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approval, cause us to suspend or discontinue clinical trials, abandon product candidates, limit the
commercial profile of an approved label, or result in significant negative consequences following
marketing approval, if any.

● If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of

necessary regulatory approvals could be delayed or prevented.

● Our industry is subject to competition for skilled personnel and the challenges we face to identify and

retain key personnel could impair our ability to effectively conduct and grow our operations.

● The development and commercialization of biologic products is subject to extensive regulation, and we

may not obtain regulatory approvals for any of our product candidates.

● We face significant competition from other biotechnology and pharmaceutical companies and our

operating results will suffer if we fail to compete effectively.

● Our current and future relationships with healthcare professionals, principal investigators, consultants,

customers, and third-party payors in the United States and elsewhere may be subject, directly or indirectly,
to applicable anti-kickback, fraud and abuse, false claims, physician payment transparency, health
information privacy and security and other healthcare laws and regulations, which could expose us to
penalties.

● Present and future legislation may increase the difficulty and cost for us to obtain marketing approval of

and commercialize our product candidates and affect the prices we may obtain.

● Even if we are able to commercialize any product candidates, our product candidates may be subject to
unfavorable pricing regulations, third-party coverage and reimbursement policies or healthcare reform
initiatives.

● Our business involves the controlled use of hazardous materials, and as such we are subject to

environmental and occupational safety laws. Continued compliance with these laws may incur substantial
costs and failure to maintain compliance could result in liability for damages that may exceed our
resources.

Risks Related To Our Company

Our success depends on our ability to use and expand our XmAb technology platform to build a pipeline of product
candidates and develop marketable products. We cannot be certain our candidates will receive regulatory approval or be
successfully commercialized.

We use our proprietary XmAb technology platform to develop engineered antibodies, with an initial focus on four

properties: immune inhibition, cytotoxicity, extended half-life and most recently, heterodimeric Fc domains enabling
molecules with dual target binding. This platform has led to our current pipeline of candidates as well as the other
programs that utilize our technology and that are being developed by our partners and licensees. While we believe our
preclinical and clinical data to date, together with our established partnerships, has validated our platform to a degree, most
of the programs are in early stages of development. Although drug candidates incorporating our Fc technology, or Fc
candidates, have been approved by the FDA, other product candidates have not yet been, and may never lead to, approved
or marketable therapeutic antibody products. Even if we are successful in continuing to build our pipeline, the potential
candidates that we identify may not be suitable for clinical development, including as a result of their harmful side effects,
limited efficacy or other characteristics that indicate that they are unlikely to receive marketing approval and achieve
market acceptance. If we do not successfully develop and commercialize product candidates, we may not be able to obtain
product or partnership revenues in future periods, which would adversely affect our business, prospects, financial condition
and results of operations.

The clinical development stage of our operations may make it difficult for you to evaluate the success of our business to
date and to assess our future viability.

Our operations to date have been limited to raising capital, staffing our company, developing our proprietary
XmAb technology platform, identifying potential product candidates, conducting preclinical studies and clinical trials,
developing partnerships and business planning. We have conducted, or are currently conducting, early phase clinical trials
for several product candidates, but have not completed any late stage clinical trials for these or any other product candidate.
We have not yet demonstrated our ability to successfully complete any pivotal clinical trials, obtain regulatory

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approvals, manufacture a commercial scale product, or arrange for a third party to do so on our behalf, or conduct sales and
marketing activities necessary for successful product commercialization. Consequently, any predictions you make about
our future success or viability may not be as accurate as they could be if we were further advanced in development of our
product candidates.

In addition, we may encounter unforeseen expenses, difficulties, complications, delays and other known and

unknown factors. We believe to be successful will need to transition from a company with a research and development
focus to a company capable of supporting commercial activities. We may not be successful in this transition.

We expect our financial condition and operating results to continue to fluctuate significantly from quarter to
quarter and year to year due to a variety of factors, many of which are beyond our control. Accordingly, you should not rely
upon the results of any quarterly or annual periods as indications of future operating performance.

The COVID-19 pandemic and the future outbreak of other highly infectious or contagious diseases, could materially
and adversely impact or disrupt our business and our financial condition, results of operations, cash flows and
performance.

On March 11, 2020, the World Health Organization (WHO) declared the rapid spread of COVID-19 a global

pandemic, and on March 19, the Governor of the State of California, where we are headquartered and where our principal
place of business is located, implemented a mandatory stay at home order for residents working in non-critical businesses.

While we have managed to maintain our operations during the COVID-19 pandemic, additional developments

with this pandemic or another epidemic or pandemic, could cause significant disruptions to our business operations,
business operations of our partners, on whom we rely for potential revenue, and product development collaborations;
operations of our third-party manufacturers and CROs, on which we rely to conduct our clinical trials; and to our clinical
trials, including as a result of significant restrictions or bans on travel into and within the countries in which our
manufacturers produce our product candidates or where we conduct our clinical trials. Such disruptions could impede,
delay, limit or prevent our employees and CROs from continuing research and development activities.

Although the COVID-19 pandemic has not materially affected our clinical development for the year ended
December 31, 2020, certain of our clinical programs have seen slower enrollment and there have also been delays in
initiating new studies as a result of the COVID-19 pandemic. These delays are not seen across all our trials and are specific
to certain trials enrolling at certain sites. In the future, the COVID-19 pandemic could further adversely affect our and our
partners’ ability to enroll and recruit patients in current and future clinical trials. Our success is dependent on our ability
and the ability of our partners to advance our wholly-owned and partnered development programs into later stages of
clinical development. Many pharmaceutical and biotechnology companies have indicated that their clinical trials will be
delayed and enrollment of current and ongoing trials will suffer as a result of the COVID-19 pandemic. Completion of our
ongoing clinical and preclinical studies or commencement of new clinical trials could be impeded, delayed, limited or
prevented by the effects of the COVID-19 pandemic and related restrictions including negative effects on the production,
delivery or release of our product candidates to our clinical trial sites, as participation by our clinical trial investigators,
patients or other critical staff, which to could delay data collection, analysis and other related activities, any of which could
cause delay or denial of regulatory approval of our product candidates. The delay and impact on enrollment cannot be
determined at this time and will depend on the length and severity of the COVID-19 pandemic. Continued delays on our
clinical and preclinical studies or trials will increase our costs and expenses and seriously harm our operations and financial
condition, which will adversely affect our business.

The COVID-19 pandemic could also potentially affect the business of the FDA as well as other health regulatory

authorities, which could result in delays in our communications with these authorities and ultimately in the ability for us
and our partners to have drug products approved.

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The COVID-19 pandemic and mitigation measures also have had and may continue to have an adverse impact on

global economic conditions which could have an adverse effect on our business and financial condition, including
impairment of our ability to raise capital when needed. The trading prices for biopharmaceutical companies’ stock,
including our common shares have been highly volatile as a result of the COVID-19 pandemic. In addition, a recession,
depression, or other sustained adverse market event resulting from the COVID-19 pandemic could materially and adversely
affect our business and the value of our common shares.

The COVID-19 pandemic could potentially affect our partnerships and collaborations which provide us with

revenue and non-dilutive payments in the form of upfront payments, milestone payments, royalties, and cost-sharing of co-
development programs. If our partners’ and collaborators’ operations are severely affected by the COVID-19 pandemic, it
will adversely affect our future potential revenue from such partners and collaborators.

We have required most of our employees, including all of our administrative employees, to work remotely,

restricted on-site staff to only those employees that must perform essential activities that must be completed on-site and
limited the number of staff allowed in our laboratory and offices. These changes may negatively impact productivity, or
disrupt, delay, or otherwise adversely impact our business. In addition, this could increase our cyber security risk, create
data accessibility concerns, and make us more susceptible to communication disruptions, any of which could adversely
impact our business operations. When we reopen our facilities, we could encounter delays in connection with
implementing precautionary measures to mitigate the risk of exposing our facilities and employees to COVID-19.

The COVID-19 pandemic could adversely affect our supply chain for our research, development, and clinical
programs. We rely on third party vendors for research supplies, development activities including manufacturing of drug
product for our clinical studies and testing of drug material. In the third quarter of 2020, several manufacturing vendors
notified us of critical supply shortages which will delay the development timelines for our earlier stage development
programs by three to six months. We currently do not expect these supply shortages to delay the timelines for our programs
that are already in clinical studies. However, if this supply disruption extends for more than the expected three to six
months, it will extend the timelines for advancing our earlier stage programs further and could also delay the current
timelines for advancing our existing clinical programs. If any other vendors in our supply chain of products or services are
also severely affected from the COVID-19 pandemic, it will adversely affect our ability to continue our research and
development activities and also continue our clinical trial activities.

The COVID-19 pandemic continues to rapidly evolve. Its ultimate impact on our business operations is highly

uncertain and subject to change that will depend on future developments, which cannot be accurately predicted, including
the duration of the COVID-19 pandemic, additional or modified government actions, new information that will emerge
concerning the severity and impact of COVID-19 and the actions taken to address its impact in the short and long term,
among others. We do not yet know the full extent of potential delays or impacts on our business, our clinical trials, our
research programs, healthcare systems or the global economy. We will continue to monitor the situation closely.

Risks Specifically Related to our Financial Position, Capital Requirements and Ownership of Our Common Stock

We have incurred significant losses since our inception and anticipate that we will continue to incur significant losses
for the foreseeable future.

We are a clinical-stage biopharmaceutical company. To date, we have financed our operations primarily through
equity financings and our research and development licensing agreements and have incurred significant operating losses
since our inception in 1997. For the year ended December 31, 2020, we incurred a net loss $69.3 million and as of
December 31, 2020, we had an accumulated deficit of $365.7 million. We expect to incur additional losses in future years
as we execute our plan to continue our discovery, research and development activities, including the ongoing and planned
clinical development of our antibody product candidates, and incur the additional costs of operating as a public company.
We are unable to predict the extent of any future losses or when we will become profitable, if ever. Even if we do achieve
profitability, we may not be able to sustain or increase profitability on an ongoing basis which would adversely affect our
business, prospects, financial condition and results of operations.

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Biopharmaceutical product development is a highly speculative undertaking and involves a substantial degree of
uncertainty. We have never generated any revenue from product sales and may never be profitable.

We have devoted substantially all of our financial resources and efforts to developing our proprietary XmAb

technology platform, identifying potential product candidates and conducting preclinical studies and clinical trials. We and
our partners are still in the early stages of developing our product candidates, and we have not completed development of
any of our wholly-owned products. Our revenue to date has been primarily revenue from the license of our proprietary
XmAb technology platform and drug candidates for the development of product candidates by others or revenue from our
partners. Our ability to generate revenue and achieve profitability depends in large part on our ability, alone or with
partners, to achieve milestones and to successfully complete the development of, obtain the necessary regulatory approvals
for, and commercialize and market, product candidates. We do not anticipate generating revenues from sales of our own
products in the foreseeable future that will provide sufficient proceeds to fund our operations on an ongoing basis.

Our ability to generate future revenues from licensing our proprietary XmAb technologies and drug candidates

depends heavily on our and our partners’ success in advancing drug candidate that they have licensed from us or developed
using one of our technologies. Our partners face the same development, regulatory and market risk for advancing their drug
candidates and their ability to successfully advance these partnered programs will affect potential milestones and royalties
we could earn under our collaboration agreements. Further, our partners may decide not to pursue, or decide to deprioritize
our programs due to changing priorities which could affect our future potential revenue from such arrangements.

Because of the numerous risks and uncertainties associated with biologic product development, we are unable to

predict the timing or amount of increased expenses and when we will be able to achieve or maintain profitability, if ever. In
addition, our expenses could increase beyond expectations if we are required by the FDA, or foreign regulatory agencies,
to perform studies and trials in addition to those that we currently anticipate, or if there are any delays in our or our partners
completing clinical trials or the development of any of our product candidates. Even if we or our partners are able to
generate revenues from the sale of any approved products, we may not become profitable and may need to obtain
additional funding to continue operations, which may not be available to us on favorable terms, if at all.

We will require additional financing and may be unable to raise sufficient capital, which could lead us to delay, reduce
or abandon research and development programs or commercialization.

As of December 31, 2020, we had $604.0 million in cash, cash equivalents and marketable securities. We expect
our expenses to increase in connection with our ongoing development activities, including the continued development of
our pipeline of bispecific drug candidates and other research activities. Identifying potential product candidates and
conducting preclinical testing and clinical trials are time-consuming, expensive and uncertain processes that take years to
complete, and we or our partners may never generate the necessary data or results required to obtain regulatory approval
and achieve product sales. In addition, our product candidates, if approved, may not achieve commercial success.

Our commercial revenues, if any, will be derived from sales of products that we do not expect to be commercially
available for many years, if at all. If we are unable to raise capital when needed or on attractive terms, we could be forced
to delay, reduce or eliminate our research and development programs or any future commercialization efforts.

We believe our existing cash, cash equivalents and marketable securities, together with interest thereon and

expected milestones and royalty payments will be sufficient to fund our operations into 2024. However, changing
circumstances or inaccurate estimates by us may cause us to use capital significantly faster than we currently anticipate,
and we may need to spend more money than currently expected because of circumstances beyond our control. We do not
have sufficient cash to complete the clinical development of any of our product candidates and will require additional
funding to complete the development activities required for regulatory approval of our current product candidates or any
other future product candidates that we develop independently. Because successful development of our product candidates
is uncertain, we are unable to estimate the actual funds we will require to complete research and development

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and commercialize our product candidates. Adequate additional financing may not be available to us on acceptable terms,
or at all. In addition, we may seek additional capital due to favorable market conditions or strategic considerations; even if
we believe we have sufficient funds for our current or future operating plans. If we are unable to raise capital when needed
or on attractive terms, we could be forced to delay, reduce or eliminate our research and development programs or any
future commercialization efforts.

The market price of our common stock is likely to be highly volatile, and you could lose all or part of your investment.

Prior to our initial public offering (IPO), there was no public market for our common stock. The trading price of
our common stock is likely to be volatile. Since our IPO, the trading price of our common stock has ranged from a low of
approximately $5.75 to a high of approximately $55.33. Our stock price could be subject to wide fluctuations in response
to a variety of factors, including the following:

1.

2.

3.

4.

5.

6.

7.

8.

9.

adverse results or delays, or cancellations of clinical trials by us or our partners;

inability to obtain additional funding;

changes in laws or regulations applicable to our products;

inability to obtain adequate product supply for our product candidates, or the inability to do so at acceptable
prices;

adverse regulatory decisions;

changes in the structure of healthcare payment systems;

introduction of new products or technologies by our competitors;

failure to meet or exceed product development or financial projections we provide to the public;

the perception of the pharmaceutical and biotechnology industry by the public, legislatures, regulators and
the investment community;

10. announcements of significant acquisitions, strategic partnerships, joint ventures or capital commitments by us

or our competitors;

11. disputes or other developments relating to proprietary rights, including patents, litigation matters and our

ability to obtain patent protection for our technologies;

12. additions or departures of key scientific or management personnel;

13. significant lawsuits, including patent or stockholder litigation;

14. changes in the market valuations of similar companies;

15. sales of our common stock by us or our stockholders in the future; and

16. trading volume of our common stock.

In addition, the stock market in general, and the Nasdaq Global Market and biotechnology companies in
particular, have experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to
the operating performance of these companies. Broad market and industry factors may negatively affect the market price of
our common stock, regardless of our actual operating performance.

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In the past, securities class action litigation has often been brought against a company following a decline in the

market price of its securities. This risk is especially relevant for us because biopharmaceutical companies have experienced
significant stock price volatility in recent years. If we face such litigation, it could result in substantial costs and a diversion
of management’s attention and resources, which could harm our business.

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

Based on information available to us as of December 31, 2020 our executive officers, directors, 5% stockholders

and their affiliates beneficially owned, as a group, approximately 67% of our voting stock.

Therefore, our officers, directors and 5% stockholders and their affiliates will have the ability to influence us

through this ownership position and so long as they continue to beneficially own a significant amount of our outstanding
voting stock. These stockholders may be able to determine all matters requiring stockholder approval and this
concentration of ownership may deprive other stockholders from realizing the true value of our common stock. For
example, these stockholders, acting together, may be able to control elections of directors, amendments of our
organizational documents, or approval of any merger, sale of assets, or other major corporate transaction. This may prevent
or discourage unsolicited acquisition proposals, offers for our common stock or other transactions or arrangements that you
may believe are in your best interest as one of our stockholders.

Raising additional funds through debt or equity financing may be dilutive or restrict our operations and raising funds
through licensing may require us to relinquish rights to our technology or product candidates.

To the extent that additional capital is raised through the sale of equity or convertible debt securities, the issuance
of those securities could result in substantial dilution for our current stockholders and the terms may include liquidation or
other preferences that adversely affect the rights of our current stockholders. Existing stockholders may not agree with our
financing plans or the terms of such financings. If we are unable to obtain additional funding on required timelines, we may
be required to:

1. seek collaborators for one or more of our product candidates at an earlier stage than otherwise would be

desirable or on terms that are less favorable than might otherwise be available;

2. relinquish or license on unfavorable terms our rights to technologies or product candidates that we otherwise

would seek to develop or commercialize ourselves; or

3. significantly curtail one or more of our research or development programs or cease operations altogether.

Additional funding may not be available to us on acceptable terms, or at all.

Future sales and issuances of our common stock or rights to purchase common stock, including pursuant to our equity
incentive plans, could result in additional dilution of the percentage ownership of our stockholders and could cause our
stock price to fall.

We expect that significant additional capital will be needed in the future to continue our planned operations. To

the extent we raise additional capital by issuing equity securities, our stockholders may experience substantial dilution. We
may sell common stock, convertible securities, or other equity securities in one or more transactions at prices and in a
manner, we determine from time to time. These sales may also result in material dilution to our existing stockholders, and
new investors could gain rights superior to our existing stockholders.

Pursuant to our 2013 equity incentive plan (2013 plan), subject to board approval, our management is authorized

to grant stock options and other equity-based awards to our employees, directors and consultants. The number of shares
available for future grant under the 2013 plan will automatically increase each year until 2023 by 4% of all shares of our
capital stock outstanding as of December 31 of the prior calendar year, subject to the ability of our Board of Directors to
take action to reduce the size of the increase in any given year. As of December 31, 2020, we had options to purchase
7,751,789 shares outstanding under our equity compensation plans. In addition, we are also authorized to

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grant equity awards, including stock options, to our employees, directors and consultants, covering up to 11,479,096 shares
of our common stock, pursuant to our equity compensation plans. We plan to register the number of shares available for
issuance or subject to outstanding awards under our equity compensation plans. If our Board of Directors elects to increase
the number of shares available for future grant by the maximum amount each year, our stockholders may experience
additional dilution, which could cause our stock price to fall.

If our internal control over financial reporting is not effective, we may not be able to accurately report our financial
results or file our periodic reports in a timely manner, which may cause investors to lose confidence in our reported
financial information and may lead to a decline in our stock price.

Effective internal control over financial reporting is necessary for us to provide reliable financial reports in a

timely manner. If we fail to adequately staff our accounting and finance function to address the additional demands that
will be placed upon us as a public company, including the requirements of the Sarbanes-Oxley Act of 2002, or fail to
maintain adequate internal control over financial reporting, it could prevent our management from concluding our internal
control over financial reporting is effective and impair our ability to prevent material misstatements in our financial
statements, which could cause our business to suffer.

As a large accelerated filer, we are subject to additional internal control requirements of the Sarbanes-Oxley Act

of 2002.

Sales of a substantial number of shares of our common stock by our existing stockholders in the public market could
cause our stock price to fall.

If our existing stockholders sell, or indicate an intention to sell, substantial amounts of our common stock in the

public market, the trading price of our common stock could decline. In addition, a substantial number of shares of common
stock are subject to outstanding options that are or will become eligible for sale in the public market to the extent permitted
by the provisions of various vesting schedules. If these additional shares of common stock are sold, or if it is perceived that
they will be sold, in the public market, the trading price of our common stock could decline.

Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.

Our net operating loss (NOL) carryforwards generated in tax years ending on or prior to December 31, 2017, are

only permitted to be carried forward for 20 years under applicable U.S. tax law. Under the TCJA, our federal NOLs
generated in tax years ending after December 31, 2017, may be carried forward indefinitely, but the deductibility of such
federal NOLs generated in tax years beginning after December 31, 2020, is limited. It is uncertain if and to what extent
various states will conform to the TCJA. In addition, under Sections 382 and 383 of the Internal Revenue Code of 1986, as
amended, and corresponding provisions of state law, if a corporation undergoes an “ownership change,” which is generally
defined as a greater than 50% change, by value, in its equity ownership over a three-year period, the corporation’s ability to
use its pre-change NOL carryforwards and other pre-change U.S. tax attributes (such as research tax credits) to offset its
post-change income or taxes may be limited. It is also possible that we have in the past undergone, and in the future may
undergo, ownership changes that could result in additional limitations on our net operating loss and tax credit
carryforwards.

As a result, our pre-2018 NOL carryforwards may expire prior to being used. Similar provisions of state tax law may

also apply to limit our use of accumulated state tax attributes. In addition, at the state level, there may be periods during
which the use of NOLs is suspended or otherwise limited, which could accelerate or permanently increase state taxes owed.
As a result, if we earn net taxable income, we may be unable to use all or a material portion of our NOLs and other tax
attributes, which could potentially result in increased future tax liability to us and adversely affect our future cash flows.

We do not intend to pay dividends on our common stock so any returns will be limited to the value of our stock.

We have never declared or paid any cash dividend on our common stock. We currently anticipate that we will
retain future earnings for the development, operation and expansion of our business and do not anticipate declaring or

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paying any cash dividends for the foreseeable future. Any return to stockholders will therefore be limited to the
appreciation of their stock.

Provisions in our amended and restated certificate of incorporation and bylaws, as well as provisions of Delaware law,
could make it more difficult for a third party to acquire us or increase the cost of acquiring us, even if doing so would
benefit our stockholders or remove our current management.

Some provisions of our charter documents and Delaware law may have anti-takeover effects that could discourage

an acquisition of us by others, even if an acquisition would be beneficial to our stockholders and may prevent attempts by
our stockholders to replace or remove our current management. These provisions include:

● authorizing the issuance of “blank check” preferred stock, the terms of which may be established and shares

of which may be issued without stockholder approval;

● prohibiting stockholder action by written consent, thereby requiring all stockholder actions to be taken at a

meeting of our stockholders;

● eliminating the ability of stockholders to call a special meeting of stockholders; and

● establishing advance notice requirements for nominations for election to the Board of Directors or for

proposing matters that can be acted upon at stockholder meetings.

These provisions may frustrate or prevent any attempts by our stockholders to replace or remove our current

management by making it more difficult for stockholders to replace members of our Board of Directors, which is
responsible for appointing the members of our management. In addition, we are subject to Section 203 of the Delaware
General Corporation Law, which generally prohibits a Delaware corporation from engaging in any of a broad range of
business combinations with an interested stockholder for a period of three years following the date on which the
stockholder became an interested stockholder, unless such transactions are approved by our Board of Directors. This
provision could have the effect of delaying or preventing a change of control, whether or not it is desired by or beneficial to
our stockholders. Further, other provisions of Delaware law may also discourage, delay, or prevent someone from acquiring
us or merging with us. Any provision of our certificate of incorporation or bylaws or Delaware law that has the effect of
delaying or deterring change in control could limit the opportunity for our stockholders to receive a premium for their
shares of our common stock, and could also affect the price that some investors are willing to pay for our common stock.

Requirements associated with being a public reporting company will continue to increase our costs significantly, as well
as divert significant company resources and management attention.

We have been subject to the reporting requirements of the Exchange Act and the other rules and regulations of the

Securities and Exchange Commission (SEC) since December 2013. Effective for the year-ended December 31, 2016, we
became a large accelerated filer and are subject to additional internal control and SEC reporting obligations. Compliance
with the various reporting and other requirements applicable to public reporting companies requires considerable time,
attention of management, and financial resources.

Further, the listing requirements of The Nasdaq Global Market require that we satisfy certain corporate
governance requirements relating to director independence, distributing annual and interim reports, stockholder meetings,
approvals, and voting, soliciting proxies, conflicts of interest and a code of conduct. Our management and other personnel
need to devote a substantial amount of time to ensure that we comply with all of these requirements. Moreover, the
reporting requirements, rules and regulations increase our legal and financial compliance costs and also make some
activities more time-consuming and costly. These reporting requirements, rules, and regulations, coupled with the increase
in potential litigation exposure associated with being a public company, could also make it more difficult for us to attract
and retain qualified persons to serve on our Board of Directors or board committees or to serve as executive officers, or to
obtain certain types of insurance, including directors’ and officers’ insurance, on acceptable terms.

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In addition, being a public company could make it more difficult or more costly for us to obtain certain types of
insurance, including directors’ and officers’ liability insurance, and we may be forced to accept reduced policy limits and
coverage or incur substantially higher costs to obtain the same or similar coverage. The impact of these events could also
make it more difficult for us to attract and retain qualified persons to serve on our Board of Directors, our Board
committees, or as executive officers.

Any changes we make to comply with these obligations may not be sufficient to allow us to satisfy our obligations

as a public company on a timely basis, or at all.

Risks Related to Our Intellectual Property

If we are unable to obtain, maintain and enforce intellectual property protection covering our products, others may be
able to make, use or sell products substantially the same as ours, which could adversely affect our ability to compete in
the market.

Our commercial success depends, in part, on our ability to obtain, maintain and enforce patents, trade secrets,
trademarks and other intellectual property rights and to operate without having third parties infringe, misappropriate or
circumvent the rights that we own or license. The value of many of our partnered licensing arrangements is based on the
underlying intellectual property and related patents. If we are unable to obtain, maintain and enforce intellectual property
protection covering our products or underlying technologies, others may be able to make, use or sell products that are
substantially the same as ours without incurring the sizeable development and licensing costs that we have incurred, which
would adversely affect our ability to compete in the market. As of December 31, 2020, we held over 1,000 issued patents
and pending patent applications. We file patent applications in the United States, Canada, Japan, Europe and other major
markets either directly or via the Patent Cooperation Treaty. Our ability to stop third parties from making, using, selling,
offering to sell or importing our product candidates is dependent upon the extent to which we have rights under valid and
enforceable patents or trade secrets that cover these activities. However, the patent positions of biopharmaceutical
companies, including ours, can be highly uncertain and involve complex legal and factual questions for which important
legal principles remain unresolved. No consistent policy regarding the breadth of claims allowed in patents in these fields
has emerged to date in the United States. The U.S. patent laws have recently changed, there have been changes regarding
how patent laws are interpreted, and the U.S. Patent and Trademark Office (the PTO) has also implemented changes to the
patent system. Some of these changes are currently being litigated, and we cannot accurately determine the outcome of any
such proceedings or predict future changes in the interpretation of patent laws or changes to patent laws which might be
enacted into law. Those changes may materially affect our patents, our ability to obtain patents or the patents and
applications of our collaborators and licensors. The patent situation in the biopharmaceutical industry outside the United
States is even more uncertain. Therefore, there is no assurance that our pending patent applications will result in the
issuance of patents or that we will develop additional proprietary products which are patentable. Moreover, patents issued
or to be issued to us may not provide us with any competitive advantage. Our patent position is subject to numerous
additional risks, including the following:

1. we may fail to seek patent protection for inventions that are important to our success;

2.

our pending patent applications may not result in issued patents;

3. we cannot be certain that we are the first to invent the inventions covered by pending patent applications or
that we were the first to file such applications and, if we are not, we may be subject to priority disputes;

4. we may be required to disclaim part or all of the term of certain patents or all of the term of certain patent

applications;

5. we may file patent applications but have claims restricted or we may not be able to supply sufficient data to
support our claims and, as a result, may not obtain the original claims desired or we may receive restricted
claims. Alternatively, it is possible that we may not receive any patent protection from an application;

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6. we could inadvertently abandon a patent or patent application, resulting in the loss of protection of certain

intellectual property rights in a certain country. We, our collaborators or, our patent counsel may take action
resulting in a patent or patent application becoming abandoned which may not be able to be reinstated or if
reinstated, may suffer patent term adjustments;

7.

8.

9.

the claims of our issued patents or patent applications when issued may not cover our product candidates;

no assurance can be given that our patents would be declared by a court to be valid or enforceable or that a
competitor’s technology or product would be found by a court to infringe our patents. Our patents or patent
applications may be challenged by third parties in patent litigation or in proceedings before the PTO or its
foreign counterparts, and may ultimately be declared invalid or unenforceable, or narrowed in scope;

there may be prior art of which we are not aware that may affect the validity or enforceability of a patent
claim. There also may be prior art of which we are aware, but which we do not believe affects the validity or
enforceability of a claim, which may, nonetheless, ultimately be found to affect the validity or enforceability
of a claim;

10. third parties may develop products which have the same or similar effect as our products without infringing

our patents. Such third parties may also intentionally circumvent our patents by means of alternate designs or
processes or file applications or be granted patents that would block or hurt our efforts;

11.

there may be dominating patents relevant to our product candidates of which we are not aware;

12. our patent counsel, lawyers or advisors may have given us, or may in the future give us incorrect advice or
counsel. Opinions from such patent counsel or lawyers may not be correct or may be based on incomplete
facts;

13. obtaining regulatory approval for biopharmaceutical products is a lengthy and complex process, and as a
result, any patents covering our product candidates may expire before, or shortly after such product
candidates are approved and commercialized;

14. the patent and patent enforcement laws of some foreign jurisdictions do not protect intellectual property
rights to the same extent as laws in the United States, and many companies have encountered significant
difficulties in protecting and defending such rights in foreign jurisdictions. If we encounter such difficulties
or we are otherwise precluded from effectively protecting our intellectual property rights in foreign
jurisdictions, our business prospects could be substantially harmed; and

15. we may not develop additional proprietary technologies that are patentable.

Any of these factors could hurt our ability to gain full patent protection for our products. Registered trademarks

and trademark applications in the United States and other countries are subject to similar risks as described above for
patents and patent applications, in addition to the risks described below.

Many of our product development partnership agreements are complex and may call for licensing or cross-

licensing of potentially blocking patents, know-how or intellectual property. Due to the potential overlap of data, know-
how and intellectual property rights there can be no assurance that one of our collaborators will not dispute our right to use,
license or distribute data, know-how or other intellectual property rights, and this may potentially lead to disputes, liability
or termination of a program. There are no assurances that our actions or the actions of our collaborators would not lead to
disputes or cause us to default with other collaborators. For example, we may become involved in disputes with our
collaborators relating to the ownership of intellectual property developed in the course of the partnership. We also cannot
be certain that a collaborator will not challenge the validity or enforceability of the patents we license.

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We cannot be certain that any country’s patent and/or trademark office will not implement new rules which could

seriously affect how we draft, file, prosecute and/or maintain patents, trademarks and patent and trademark applications.
We cannot be certain that increasing costs for drafting, filing, prosecuting and maintaining patents, trademarks and patent
and trademark applications will not restrict our ability to file for patent protection. For example, we may elect not to seek
patent protection in certain jurisdictions or for certain inventions in order to save costs. We may be forced to abandon or
return the rights to specific patents due to a lack of financial resources.

We intend to file applications for trademark registrations in connection with our product candidates in various

jurisdictions, including the United States. No assurance can be given that any of our trademark applications will be
registered in the United States or elsewhere, or that the use of any registered or unregistered trademarks will confer a
competitive advantage in the marketplace. Furthermore, even if we are successful in our trademark registrations, the FDA
and regulatory authorities in other countries have their own process for drug nomenclature and their own views concerning
appropriate proprietary names. No assurance can be given that the FDA or any other regulatory authority will approve of
any of our trademarks or will not request reconsideration of one of our trademarks at some time in the future. The loss,
abandonment, or cancellation of any of our trademarks or trademark applications could negatively affect the success of the
product candidates to which they relate.

We have in-licensed, and may in the future in-license, a portion of our intellectual property, and, if we fail to comply
with our obligations under these arrangements, we could lose such intellectual property rights or owe damages to the
licensor of such intellectual property.

We currently rely, and may in the future rely, on certain intellectual property rights licensed from third parties to
protect our technology and certain product candidates, and we may enter into additional license agreements in the future.
As part of our discovery and development activities, we routinely evaluate in-licenses from academic and research
institutions. We have licensed and sublicensed certain intellectual property relating to our Xtend technology from a third
party. We have also sublicensed certain intellectual property rights related to our CD3 bispecific technology from a third
party, and we have licensed certain intellectual property rights from a third party related to our tidutamab and our IL-15
product candidates. We also license certain rights to the underlying cell lines for all our product candidates from third
parties. Under these licenses, we have no right to control patent prosecution of the intellectual property or to enforce the
patents, and as such the licensed rights may not be adequately maintained by the licensors. The termination of these or
other licenses could also prevent us from commercializing product candidates covered by the licensed intellectual property.

Furthermore, the research resulting in the in-licensed patents was developed in the course of research funded by
the U.S. government. As a result, the U.S. government may have certain rights (“march-in rights”) to intellectual property
embodied in our Xtend products. Government rights in certain inventions developed under a government-funded program
include a non-exclusive, non-transferable, irrevocable worldwide license to use inventions for any governmental purpose.
Circumstances that trigger march-in rights include, for example, failure to take, within a reasonable time, effective steps to
achieve practical application of the invention in a field of use, failure to satisfy the health and safety needs of the public
and failure to meet requirements of public use specified by federal regulations. Federal law requires any licensor of an
invention that was partially funded by the federal government to obtain a covenant from any exclusive licensee to
manufacture products using the invention substantially in the United States. The U.S. government also has the right to use
and disclose, without limitation, scientific data relating to licensed technology that was developed in whole or in part at
government expense. The government funding agency can elect to exercise these march-in rights on their own initiative or
at the request of a third party. It is also possible that we might knowingly or unknowingly in-license additional technology
that is subject to U.S. government march-in rights.

Our existing license agreements impose, and we expect that future license agreements will impose, various
diligence, milestone payment, royalty and other obligations on us. If there is any conflict, dispute, disagreement or issue of
non-performance between us and our licensing partners regarding our rights or obligations under the license agreements,
including any such conflict, dispute or disagreement arising from our failure to satisfy payment obligations under any such
agreement, we may owe damages, our licensor may have a right to terminate the affected license, and our and our partners'
ability to utilize the affected intellectual property in our drug discovery and development efforts, and

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our ability to enter into collaboration or marketing agreements for an affected product or therapeutic candidate, may be
adversely affected.

We may be required to reduce the scope of our intellectual property due to third-party intellectual property claims.

Our competitors may have filed, and may in the future file, patent applications covering technology similar to

ours. Any such patent application may have priority over our patent applications, which could further require us to obtain
rights to issued patents covering such technologies. If another party has filed a U.S. patent application on inventions similar
to ours that claims priority to an application filed prior to March 16, 2013, we may have to participate in an interference
proceeding declared by the PTO to determine priority of invention in the United States. The costs of these proceedings
could be substantial, and it is possible that such efforts would be unsuccessful if, unbeknownst to us, the other party had
independently arrived at the same or similar invention prior to our own invention, resulting in a loss of our U.S. patent
position with respect to such inventions. In addition, changes enacted on March 15, 2013 to the U.S. patent laws under the
America Invents Act resulted in the United States changing from a “first to invent” country to a “first to file” country. As a
result, we may lose the ability to obtain a patent if a third-party files with the PTO first and could become involved in
proceedings before the PTO to resolve disputes related to inventorship. We may also become involved in similar
proceedings in other jurisdictions.

Furthermore, recent changes in U.S. patent law under the America Invents Act allows for post-issuance challenges

to U.S. patents, including ex parte reexaminations, inter parte reviews and post-grant oppositions. There is significant
uncertainty as to how the new laws will be applied and if our U.S. patents are challenged using such procedures, we may
not prevail, possibly resulting in altered or diminished claim scope or loss of patent rights altogether. Similarly, some
countries, notably members of the European Union, also have post grant opposition proceedings that can result in changes
in scope and/or cancellation of patent claims.

Our products could infringe patents and other property rights of others, which may result in costly litigation and, if we
are not successful, could cause us to pay substantial damages or limit our ability to commercialize our products, which
could have a material adverse effect on our business.

Our commercial success depends upon our ability, and the ability of our collaborators, to develop, manufacture,

market and sell our product candidates and use our proprietary technologies without infringing the patents and other
proprietary rights of third parties. There is considerable intellectual property litigation in the biotechnology and
pharmaceutical industries. For example, we are aware of issued patents owned by Merus B.V. (Merus) that may relate to
and claim components of our bispecific antibody product candidates and partnered bispecific product candidates, including
vibecotamab, plamotamab, tidutamab, XmAb717, XmAb104, XmAb841, and XmAb819 will putatively expire in 2033.
We are additionally aware of several patents and pending applications directed to the use of IL-15 fused with Fc domains,
and in some cases in combination with targeting domains, that might be relevant to XmAb306, with putative expirations
ranging from 2025 to later than 2032. It is possible that these terms could be extended, for example, as a result of patent
term restoration to compensate for regulatory delays. While we believe that our current development of these candidates
currently falls into the “safe harbor” of non-infringement under 35 U.S.C. §271€(1), this protection terminates upon
commercialization. In addition, there can be no assurance that our interpretation of this statutory exemption would be
upheld. We believe there exists reasonable arguments of invalidity for the Genentech patent, the Merus patents and the IL-
15 patents; however, we cannot assure that if challenged in litigation for infringement of these patents that we would
prevail. In order to successfully challenge the validity of any issued U.S. patent, we would need to overcome a presumption
of validity. This burden is a high one requiring us to present clear and convincing evidence as to the invalidity of such
claims. There is no assurance that a court would find these claims to be invalid or not infringed.

In addition, as the biopharmaceutical industry expands and more patents are issued, the risk increases that there

may be patents issued to third parties that relate to our products and technology of which we are not aware or that we must
challenge to continue our operations as currently contemplated. Our products may infringe or may be alleged to infringe
these patents. Because some patent applications in the United States may be maintained in secrecy until the patents are
issued, because patent applications in the United States and many foreign jurisdictions are typically not published until
eighteen months after filing and because publications in the scientific literature often lag behind actual discoveries, we
cannot be certain that others have not filed patents that may cover our technologies, our product

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candidates or their use. Additionally, pending patent applications which have been published can, subject to certain
limitations, be later amended in a manner that could cover our technologies, our products or the use of our products. We
may become party to, or threatened with, future adversarial proceedings or litigation regarding intellectual property rights
with respect to our products and technology. Third parties may assert infringement claims against us based on existing
patents or patents that may be granted in the future.

If we are sued for patent infringement, we would need to demonstrate that our products or methods either do not

infringe the patent claims of the relevant patent or that the patent claims are invalid, and we may not be able to do this.
Proving invalidity is difficult. For example, in the United States, proving invalidity requires a showing of clear and
convincing evidence to overcome the presumption of validity enjoyed by issued patents. Even if we are successful in these
proceedings, we may incur substantial costs and divert management’s time and attention in pursuing these proceedings,
which could have a material adverse effect on us.

Any such claims are likely to be expensive to defend, and some of our competitors may be able to sustain the

costs of complex patent litigation more effectively than we can because they have substantially greater resources.

If we are found to infringe a third party’s intellectual property rights, we could be required to obtain a license from

such third party to continue developing and marketing our products and technology. We may also elect to enter into such a
license in order to settle litigation or in order to resolve disputes prior to litigation. However, we may not be able to obtain
any required license on commercially reasonable terms or at all. Even if we were able to obtain a license, it could be non-
exclusive, thereby giving our competitors access to the same technologies licensed to us and could require us to make
substantial royalty payments. We could also be forced, including by court order, to cease commercializing the infringing
technology or product. In addition, we could be found liable for monetary damages, including treble damages and
attorneys’ fees if we are found to have willfully infringed a patent. A finding of infringement could prevent us from
commercializing our product candidates or force us to cease some of our business operations, which could materially harm
our business. Claims that we have misappropriated the confidential information or trade secrets of third parties could have
a similar negative impact on our business.

If we are not able to prevent disclosure of our trade secrets and other proprietary information, the value of our
technology and products could be significantly diminished.

We rely on trade secret protection to protect our interests in proprietary know-how and in processes for which

patents are difficult to obtain or enforce. We may not be able to protect our trade secrets adequately. We have a policy of
requiring our consultants, advisors, and collaborators to enter into confidentiality agreements and our employees to enter
into invention, non-disclosure and non-compete agreements. However, no assurance can be given that we have entered into
appropriate agreements with all parties that have had access to our trade secrets, know-how or other proprietary
information. There is also no assurance that such agreements will provide for a meaningful protection of our trade secrets,
know-how or other proprietary information in the event of any unauthorized use or disclosure of information. Furthermore,
we cannot provide assurance that any of our employees, consultants, contract personnel, or collaborators, either
accidentally or through willful misconduct, will not cause serious damage to our programs and/or our strategy, for example
by disclosing important trade secrets, know-how or proprietary information to our competitors. It is also possible that our
trade secrets, know-how or other proprietary information could be obtained by third parties as a result of breaches of our
physical or electronic security systems. Any disclosure of confidential data into the public domain or to third parties could
allow our competitors to learn our trade secrets and use the information in competition against us. In addition, others may
independently discover our trade secrets and proprietary information. Any action to enforce our rights is likely to be time
consuming and expensive, and may ultimately be unsuccessful, or may result in a remedy that is not commercially
valuable. These risks are accentuated in foreign countries where laws or law enforcement practices may not protect
proprietary rights as fully as in the United States or Europe. Any unauthorized disclosure of our trade secrets or proprietary
information could harm our competitive position.

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

Depending upon the timing, duration, and specifics of any FDA marketing approval of any therapeutic candidates we

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may develop, one or more of our owned or licensed U.S. patents may be eligible for limited patent term extension under
the Hatch-Waxman Act. 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
or we fail to choose the most optimal patents to extend, our competitors may obtain approval of competing products
following our patent expiration, and our business, financial condition, results of operations and prospects could be
materially harmed.

Risks Related to Our Dependence on Third Parties

Our patent protection and prosecution for some of our product candidates is dependent on third parties.

While we normally seek and gain the right to fully prosecute the patents relating to our product candidates, there may be
times when patents relating to our product candidates are controlled by our licensors.

We rely on third-party manufacturers for the manufacture of our XmAb-engineered antibodies. This entails a complex
process and manufacturers often encounter difficulties in production. If we, or any of our third-party manufacturers,
encounter any loss of our master cell banks or if any of our third-party manufacturers otherwise fail to comply with
their contractual obligations, the development or commercialization of our product candidates could be delayed or
stopped.

The manufacture of biopharmaceutical products is complex and requires significant expertise and capital
investment, including the development of advanced manufacturing techniques and process controls. We and our contract
manufacturers must comply with cGMP regulations and guidelines. Manufacturers of biopharmaceutical products often
encounter difficulties in production, particularly in scaling up and validating initial production and contamination. These
problems include difficulties with production costs and yields, quality control, including stability of the product, quality
assurance testing, operator error, shortages of qualified personnel, as well as compliance with strictly enforced federal, state
and foreign regulations. Furthermore, if microbial, viral or other contaminations are discovered in our products or in the
manufacturing facilities in which our products are made, such manufacturing facilities may need to be closed for an
extended period of time to investigate and remedy the contamination.

All of our XmAb engineered antibodies are manufactured by starting with cells which are stored in a cell bank.

We have one master cell bank for each antibody manufactured in accordance with cGMP and multiple working cell banks
and believe we would have adequate backup should any cell bank be lost in a catastrophic event. However, it is possible
that we could lose multiple cell banks and have our manufacturing severely impacted by the need to replace the cell banks.

We cannot assure you that any stability or other issues relating to the manufacture of any of our product
candidates or products will not occur in the future. Additionally, our manufacturer may experience manufacturing
difficulties due to resource constraints or as a result of labor disputes or unstable political environments. If our
manufacturers were to encounter any of these difficulties, or otherwise fail to comply with their contractual obligations, our
ability to provide any product candidates to patients in clinical trials and products to patients, once approved, would be
jeopardized. Any delay or interruption in the supply of clinical trial supplies could delay the completion of clinical trials,
increase the costs associated with maintaining clinical trial programs and, depending upon the period of delay, require us to
commence new clinical trials at additional expense or terminate clinical trials completely. Any adverse developments
affecting clinical or commercial manufacturing of our product candidates or products may result in shipment delays,
inventory shortages, lot failures, product withdrawals or recalls, or other interruptions in the supply of our product
candidates or products. We may also have to take inventory write-offs and incur other charges and expenses for product
candidates or products that fail to meet specifications, undertake costly remediation efforts or seek more costly
manufacturing alternatives. Accordingly, failures or difficulties faced at any level of our supply chain could

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materially adversely affect our business and delay or impede the development and commercialization of any of our product
candidates or products and could have a material adverse effect on our business, prospects, financial condition and results
of operations.

Our existing partnerships are important to our business, and future partnerships may also be important to us. If we are
unable to maintain any of these partnerships, or if these partnerships are not successful, our business could be
adversely affected.

Because developing biologics products, conducting clinical trials, obtaining regulatory approval, establishing

manufacturing capabilities and marketing approved products are expensive, we have entered into partnerships, and may
seek to enter into additional partnerships, with companies that have more resources and experience than us, and we may
become dependent upon the establishment and successful implementation of partnership agreements.

Our partnership and license agreements include those we have announced with Janssen Genentech, Novartis,

Amgen, MorphoSys, Alexion and others. These partnerships and license agreements also have provided us with important
funding for our development programs, and we expect to receive additional funding under these partnerships in the future.
Our existing partnerships, and any future partnerships we enter into, may pose a number of risks, including the following:

1.

2.

3.

4.

5.

6.

7.

collaborators have significant discretion in determining the efforts and resources that they will apply to these
partnerships. For example, in 2020, Amgen notified us of its decision to return the rights to AMG 424 to us
under the terms of the Amgen Agreement, and in December 2018, Novartis notified us of its decision to
return the rights to plamotamab to us under the terms of the Novartis Agreement;

our Novartis Agreement requires us to co-develop worldwide with Novartis our lead bispecific antibody
candidate, vibecotamab, and share development costs. Such an arrangement may require us to incur
substantial costs in excess of our available resources;

our Genentech Agreement requires that we fund 45% of worldwide development costs of XmAb306 and
other IL-15 candidates. Such an arrangement may require us to incur substantial costs in excess of available
resources;

collaborators may not pursue development and commercialization of any product candidates that achieve
regulatory approval or may elect not to continue or renew development or commercialization programs based
on clinical trial results, changes in the collaborators’ strategic focus or available funding, or external factors,
such as an acquisition, that divert resources or create competing priorities;

collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical
trial or abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a
product candidate for clinical testing;

collaborators could independently develop, or develop with third parties, products that compete directly or
indirectly with our products or product candidates if the collaborators believe that competitive products are
more likely to be successfully developed or can be commercialized under terms that are more economically
attractive than ours, which may cause collaborators to cease to devote resources to the commercialization of
our product candidates;

a collaborator with marketing and distribution rights to one or more of our product candidates that achieve
regulatory approval may not commit sufficient resources to the marketing and distribution of such product or
products;

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8.

disagreements with collaborators, including disagreements over proprietary rights, contract interpretation or
the preferred course of development, might cause delays or termination of the research, development or
commercialization of product candidates, might lead to additional responsibilities for us with respect to
product candidates, or might result in litigation or arbitration, any of which would be time-consuming and
expensive;

9. while we have generally retained the right to maintain and defend our intellectual property under our

agreements with collaborators, certain collaborators may not properly maintain or defend certain of our
intellectual property rights or may use our proprietary information in such a way as to invite litigation that
could jeopardize or invalidate our intellectual property or proprietary information;

10. collaborators may infringe the intellectual property rights of third parties, which may expose us to litigation

and potential liability;

11. collaborators may learn about our technology and use this knowledge to compete with us in the future;

12. results of collaborators’ preclinical or clinical studies could produce results that harm or impair other

products using our XmAb technology platform;

13. there may be conflicts between different collaborators that could negatively affect those partnerships and

potentially others; and

14. the number and type of our partnerships could adversely affect our attractiveness to future collaborators or

acquirers.

If our partnerships and license agreements do not result in the successful development and commercialization of

products or if one of our collaborators terminates its agreement with us, we may not receive any future research and
development funding or milestone or royalty payments under the arrangement. If we do not receive the funding we expect
under these arrangements, our continued development of our product candidates could be delayed, and we may need
additional resources to develop additional product candidates. All of the risks described in these risk factors relating to
product development, regulatory approval and commercialization described in this Annual Report also apply to the
activities of our collaborators and there can be no assurance that our partnerships and license agreements will produce
positive results or successful products on a timely basis or at all.

Our partnership agreements generally grant our collaborators exclusive rights under certain of our intellectual

property and may therefore preclude us from entering into partnerships with others relating to the same or similar
compounds, indications or diseases. In addition, partnership agreements may place restrictions or additional obligations on
our ability to license additional compounds in different indications, diseases or geographical locations. If we fail to comply
with or breach any provision of a partnership agreement, a collaborator may have the right to terminate, in whole or in part,
such agreement or to seek damages. Many of our collaborators also have the right to terminate the partnership agreement
for convenience. If a partnership agreement is terminated, in whole or in part, we may be unable to continue the
development and commercialization of the applicable product candidates, and even if we are able to do so, such efforts
may be delayed and result in additional costs.

There is no assurance that a collaborator who is acquired by a third party would not attempt to change certain

contract provisions that could negatively affect our partnership. The acquiring company may also not accept the terms or
assignment of our contracts and may seek to terminate the agreements. Any one of our partners could breach covenants,
restrictions and/or sub-license agreement provisions leading us into disputes and potential breaches of our agreements with
other partners.

We may in the future determine to partner with additional pharmaceutical and biotechnology companies for

development and potential commercialization of therapeutic products. We face significant competition in seeking
appropriate collaborators. Our ability to reach a definitive agreement for a partnership will depend, among other things,
upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed partnership

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and the proposed collaborator’s evaluation of a number of factors. If we elect to fund and undertake development or
commercialization activities on our own, we may need to obtain additional expertise and additional capital, which may not
be available to us on acceptable terms or at all. If we fail to enter into partnerships and do not have sufficient funds or
expertise to undertake the necessary development and commercialization activities, we may not be able to further develop
our product candidates or bring them to market or continue to develop our product platform and our business, prospects,
financial condition and results of operations may be materially and adversely affected.

We rely upon third-party contractors, and service providers for the execution of most aspects of our development
programs. Failure of these collaborators to provide services of a suitable quality and within acceptable timeframes may
cause the delay or failure of our development programs.

We outsource manufacturing, certain functions, testing and services to contract research organizations (CROs),

medical institutions and collaborators, and we rely on third parties for quality assurance, clinical monitoring, clinical data
management and regulatory expertise. We also have engaged, and may in the future engage, a CRO to run all aspects of a
clinical trial on our behalf. There is no assurance that such individuals or organizations will be able to provide the
functions, tests, biologic supply or services as agreed upon or in a quality fashion and we could suffer significant delays in
the development of our products or processes.

In some cases, there may be only one or few providers of such services, including clinical data management or

manufacturing services. In addition, the cost of such services could be significantly increased over time. We rely on third
parties and collaborators as mentioned above to enroll qualified patients and conduct, supervise and monitor our clinical
trials. Our reliance on these third parties and collaborators for clinical development activities reduces our control over these
activities. Our reliance on these parties, however, does not relieve us of our regulatory responsibilities, including ensuring
that our clinical trials are conducted in accordance with GCP regulations and the investigational plan and protocols
contained in the regulatory agency applications. In addition, these third parties may not complete activities on schedule or
may not manufacture under GMP conditions. Preclinical or clinical studies may not be performed or completed in
accordance with Good Laboratory Practices (GLP) regulatory requirements or our trial design. If these third parties or
collaborators do not successfully carry out their contractual duties or meet expected deadlines, obtaining regulatory
approval for manufacturing and commercialization of our product candidates may be delayed or prevented. We rely
substantially on third-party data managers for our clinical trial data. There is no assurance that these third parties will not
make errors in the design, management or retention of our data or data systems. There is no assurance these third parties
will pass FDA or regulatory audits, which could delay or prohibit regulatory approval.

We rely on third parties to manufacture supplies of our preclinical and clinical product candidates. The development of
such candidates could be stopped or delayed if any such third party fails to provide us with sufficient quantities of
product or fails to do so at acceptable quality levels or prices or fails to maintain or achieve satisfactory regulatory
compliance.

We do not currently have nor do we plan to acquire the infrastructure or capability internally to manufacture our

clinical drug supplies for use in the conduct of our clinical trials, and we lack the resources and the capability to
manufacture any clinical candidates on a clinical scale. Instead, we rely on our third-party manufacturing partners to
manufacture our clinical drug supply. Any of our contract manufacturers may not perform as agreed, may be unable to
comply with cGMP requirements and with FDA, state and foreign regulatory requirements or may terminate their
respective agreements with us.

In addition, manufacturers are subject to ongoing periodic unannounced inspection by the FDA and other

governmental authorities to ensure strict compliance with government regulations. We do not control the manufacturing
processes of our third-party manufacturing partners, which include, among other things, quality control, quality assurance
and the maintenance of records and documentation. If we were to experience an unexpected loss of supply, we could
experience delays in our planned clinical trials as our third-party manufacturing partner would need to manufacture
additional clinical drug supply and would need sufficient lead time to schedule a manufacturing slot. While there are other
potential suppliers of clinical supplies of our biologics, the long transition periods necessary to switch manufacturers for
any of our clinical drug supply would significantly delay our clinical trials and the commercialization of such products, if
approved.

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Risks Related To Our Industry

Clinical trials are expensive and take years to conduct and the outcome of such clinical trials is uncertain. Clinical
trials may fail to prove our product candidates are safe and effective. This could lead to delays, downsizing or
termination of clinical development plans for any our product candidates.

Each product candidate must receive regulatory approval and therefore must undergo rigorous and extensive

preclinical studies and clinical trials to demonstrate safety and efficacy in patients. Clinical trials at any stage in
development may fail to demonstrate the safety, efficacy or pharmacologic properties needed to be a viable product
candidate in patients. Early clinical trials may fail to demonstrate the safety and pharmacokinetic characteristics needed to
invest in larger later stage clinical studies. Later clinical studies that are larger may not demonstrate the desired safety and
efficacy profile needed to be of benefit to patients. Additionally, regulatory authorities may determine that the data
provided is not sufficient to grant marketing approval for our product candidates and may request additional data including
additional clinical trials or reject product approval.

Adverse side effects or other safety risks associated with our product candidates could delay or preclude approval, cause
us to suspend or discontinue clinical trials, abandon product candidates, limit the commercial profile of an approved
label, or result in significant negative consequences following marketing approval, if any.

Conducting early clinical trials is complex and the outcomes are uncertain. Preclinical studies are performed to
help inform human clinical trials, but human and animal studies are not comparable. Expected or unexpected undesirable
side effects caused by our product candidates could result in the delay, suspension or termination of clinical trials by us, our
collaborators, the FDA or other regulatory authorities for a number of reasons. If we elect or are required to delay, suspend
or terminate any clinical trial of any product candidates that we develop, the commercial prospects of such product
candidates will be harmed and our ability to generate product revenues from any of these product candidates will be
delayed or eliminated. Serious adverse events observed in clinical trials could hinder or prevent market acceptance of the
product candidate at issue. Any of these occurrences may harm our business, prospects, financial condition and results of
operations significantly.

If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of necessary regulatory
approvals could be delayed or prevented.

We may not be able to initiate or continue clinical trials for our product candidates if we are unable to locate and

enroll a sufficient number of eligible patients to participate in these trials as required by the FDA or similar regulatory
authorities outside the United States. In addition, some of our competitors have ongoing clinical trials for product
candidates that treat the same indications as our product candidates, and patients who would otherwise be eligible for our
clinical trials may instead enroll in clinical trials of our competitors’ product candidates.

Our inability to enroll a sufficient number of patients for any of our clinical trials could result in significant delays
and could require us to abandon one or more clinical trials altogether. Enrollment delays in our clinical trials may result in
increased development costs for our product candidates and in delays to commercially launching our product candidates, if
approved, which would cause the value of our company to decline and limit our ability to obtain additional financing.

Our industry is subject to competition for skilled personnel and the challenges we face to identify and retain key
personnel could impair our ability to effectively conduct and grow our operations.

Attracting and retaining the highly qualified management, scientific and medical personnel necessary for us to

successfully implement our business strategy is extremely competitive in the biotechnology industry. Our industry is
experiencing an increasing rate of competition in hiring and retaining employees and in turnover of management personnel.
We depend heavily on our current management team, whose services are critical to the successful implementation of our
product candidate development and regulatory strategies. In order to induce valuable employees to continue their
employment with us, we have provided equity incentives that vest over time. The value to employees of

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this equity is significantly affected by movements in our stock price that are beyond our control and may at any time be
insufficient to counteract more lucrative offers from other companies.

Despite our efforts to retain valuable employees, members of our management team may terminate their
employment with us at any time, with or without notice. Further, we do not maintain “key person” insurance for any of our
executives or other employees. The loss of the services of any of our executive officers and our inability to find suitable
replacements could harm our business, financial condition, prospects and ability to achieve the successful development or
commercialization of our product candidates. Our success also depends on our ability to continue to attract, retain and
motivate highly skilled scientific and medical personnel at all levels.

Since 2016 we have been increasing the number of our employees and expanding the scope of our operations with

a goal of advancing multiple clinical candidates into development. The increase in our number of employees places a
significant strain on our management, operations, and financial resources, and we may have difficulty managing this
growth. As we continue to grow our operations and advance our clinical programs into later stages of development, it will
require us to recruit and retain employees with additional knowledge and skill sets and no assurance can be provided that
we will be able to attract employees with the necessary skill set to assist in our growth. Many of the other biotechnology
and pharmaceutical companies and academic institutions that we compete against for qualified personnel have greater
financial and other resources, different risk profiles and a longer history in the industry than we do. We also may employ
consultants or part-time and contract employees. There can be no assurance that these individuals are retainable. While we
have been able to attract and retain skilled and experienced personnel and consultants in the past, no assurance can be
given that we will be able to do so in the future.

The development and commercialization of biologic products is subject to extensive regulation, and we may not obtain
regulatory approvals for any of our product candidates.

The clinical development, manufacturing, labeling, packaging, storage, recordkeeping, advertising, promotion,

export, import, marketing and distribution and other possible activities relating to our current lead antibody product
candidates, as well as any other antibody product candidate that we may develop in the future, are subject to extensive
regulation in the United States and outside the US as biologics.

If we experience delays in obtaining approval, or if we fail to obtain approval of our product candidates, the

commercial prospects for our product candidates may be harmed and our ability to generate revenues will be materially
impaired which would adversely affect our business, prospects, financial condition and results of operations.

We face significant competition from other biotechnology and pharmaceutical companies and our operating results will
suffer if we fail to compete effectively.

The biotechnology and pharmaceutical industries are intensely competitive. We have competitors both in the
United States and internationally, including major multinational pharmaceutical companies, biotechnology companies,
universities and other research institutions. Many of our competitors have substantially greater financial, technical and
other resources, such as larger research and development staff and experienced marketing and manufacturing organizations
and well-established sales forces. Competition may increase further as a result of advances in the commercial applicability
of technologies and greater availability of capital for investment in these industries. Our competitors may succeed in
developing, acquiring or licensing on an exclusive basis, drug products that are more effective or less costly than any
product candidate that we are currently developing or that we may develop.

Competition in autoimmune disease and cancer drug development is intense, with hundreds of compounds in

clinical trials by large multinational pharmaceutical companies. In addition, many currently marketed drugs are undergoing
clinical testing in new indications in order to expand their use to new patient populations. Other companies, including
many large international companies, are developing bispecific antibody technologies and checkpoint inhibitors. This
includes products in preclinical and clinical development. Some of these agents have received marketing approval, and
companies continue to conduct clinical trials to expand their currently approved indications. Alternative technologies, such
as standard chemotherapy, cellular therapies and cancer vaccines, may also compete with our products for patients to
conduct clinical trials and future potential market share.

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Our ability to compete successfully will depend largely on our ability to leverage our experience in drug discovery

and development to:

1.

2.

3.

4.

5.

discover and develop products that are superior to other products in the market;

attract qualified scientific, product development and commercial personnel;

obtain and maintain patent and/or other proprietary protection for our products and technologies;

obtain required regulatory approvals; and

successfully collaborate with pharmaceutical companies in the discovery, development and
commercialization of new products.

Established biopharmaceutical companies may invest heavily to accelerate discovery and development of products

that could make our product candidates less competitive. In addition, any new product that competes with an approved
product must demonstrate compelling advantages in efficacy, convenience, tolerability and safety in order to overcome
price competition and to be commercially successful. Accordingly, our competitors may succeed in obtaining patent
protection, receiving FDA approval or discovering, developing and commercializing medicines before we do, which would
have a material adverse impact on our business. We will not be able to successfully commercialize our product candidates
without establishing sales and marketing capabilities internally or through collaborators.

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

Healthcare providers, physicians and third-party payors in the United States and elsewhere will play a primary

role in the recommendation and prescription of any product candidates for which we obtain marketing approval. Our
current and future arrangements with healthcare professionals, principal investigators, consultants, customers and third-
party payors may require us to comply with to broadly applicable fraud and abuse and other healthcare laws, including,
without limitation, the federal Anti-Kickback Statute and the federal civil False Claims Act, that may constrain the
business or financial arrangements and relationships through which we sell, market and distribute any product candidates
for which we obtain marketing approval. In addition, we may be subject to physician payment transparency laws and
patient privacy and security regulation by the federal government and by the states and foreign jurisdictions in which we
conduct our business.

Efforts to ensure that our future business arrangements with third parties will comply with applicable healthcare

laws and regulations may involve substantial costs. It is possible that governmental authorities will conclude that our
business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and
abuse or other healthcare laws. If our operations are found to be in violation of any of these laws or any other governmental
regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, including,
without limitation, damages, fines, imprisonment, disgorgement, exclusion from participation in government healthcare
programs, such as Medicare and Medicaid, additional reporting requirements and/or oversight if we become subject to a
corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, and the
curtailment or restructuring of our operations, as well as reputational harm, which could significantly harm our business.

Present and future legislation may increase the difficulty and cost for us to obtain marketing approval of and
commercialize our product candidates and affect the prices we may obtain.

Among policy makers and payors in the United States and elsewhere, there is significant interest in promoting
changes in healthcare systems with the stated goals of containing healthcare costs, improving quality and/or expanding
access. In the United States, the pharmaceutical industry has been a particular focus of these efforts and has been

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significantly affected by major legislative initiatives. Healthcare reform measures, if approved, may result in more rigorous
coverage criteria and lower reimbursement, and in additional downward pressure on the price that may be charged for any
of our product candidates.

Even if we are able to commercialize any product candidates, our product candidates may be subject to unfavorable
pricing regulations, third-party coverage and reimbursement policies or healthcare reform initiatives.

Our ability to commercialize any product candidates successfully will depend, in part, on the extent to which

coverage and adequate reimbursement for our product candidates will be available from government payor programs at the
federal and state levels, including Medicare and Medicaid, private health insurers, managed care plans and other third-party
payors. If coverage and adequate reimbursement are not available or reimbursement is available only to limited levels, we
may not be able to successfully commercialize any product candidates for which marketing approval is obtained.

The regulations that govern marketing approvals, pricing, coverage and reimbursement for new drugs and

biological products vary widely from country to country. Current and future legislation may significantly change the
approval requirements in ways that could involve additional costs and cause delays in obtaining approvals. Some countries
require approval of the sale price of a product before it can be marketed. In many 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. As a result, we might
obtain marketing approval for a product in a particular country, but then be subject to price regulations that delay
commercial launch of the product, possibly for lengthy time periods, and negatively impact the revenues able to be
generated from the sale of the product in that country. Adverse pricing limitations may hinder our ability to recoup our
investment in one or more product candidates, even if our product candidates obtain marketing approval.

There can be no assurance that our product candidates, if they are approved for sale in the United States or in

other countries, will be considered medically reasonable and necessary for a specific indication, that they will be
considered cost-effective by third-party payors, that coverage or an adequate level of reimbursement will be available, or
that third-party payors’ reimbursement policies will not adversely affect our ability to sell our product candidates profitably
if they are approved for sale.

Our business involves the controlled use of hazardous materials and as such we are subject to environmental and
occupational safety laws. Continued compliance with these laws may incur substantial costs and failure to maintain
compliance could result in liability for damages that may exceed our resources.

Our research, manufacturing and development processes, and those of our third-party contractors and partners,

involve the controlled use of hazardous materials. We and our manufacturers are subject to federal, state and local laws and
regulations governing the use, manufacture, storage, handling and disposal of such materials and certain waste products.
Our operations involve the use of hazardous and flammable materials, including chemicals and biological materials. Our
operations also produce hazardous waste products. The risk of accidental contamination or injury from these materials
cannot be completely eliminated. In the event of such an accident, we could be held liable for any damages that result, and
any such liability could exceed our resources. We are not insured against this type of liability. We may be required to incur
significant costs to comply with environmental laws and regulations in the future, and our operations, business or assets
may be materially adversely affected by current or future environmental laws or regulations or any liability thereunder.

We may become subject to the risk of product liability claims.

We face an inherent risk of product liability as a result of the clinical testing of our product candidates and will

face an even greater risk if we or our partners commercialize any products. Human therapeutic products involve the risk of
product liability claims and associated adverse publicity. Currently, the principal risks we face relate to patients in our
clinical trials, who may suffer unintended consequences. Claims might be made by patients, healthcare providers or
pharmaceutical companies or others. For example, we may be sued if any product we develop allegedly causes injury or is
found to be otherwise unsuitable during clinical testing, manufacturing, marketing, or sale. Any such product liability

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claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the
product, negligence, strict liability, and a breach of warranties. Claims could also be asserted under state consumer
protection acts. If we cannot successfully defend ourselves against product liability claims, we may incur substantial
liabilities or be required to limit commercialization of our product candidates, if approved. Even successful defense would
require significant financial and management resources.

General Risk Factors

Our intellectual property may be infringed upon by a third party.

Third parties may infringe one or more of our issued patents or trademarks. We cannot predict if, when or where a

third party may infringe one or more of our issued patents or trademarks. To counter infringement, we may be required to
file infringement claims, which can be expensive and time consuming. There is no assurance that we would be successful
in a court of law in proving that a third party is infringing one or more of our issued patents or trademarks. Any claims we
assert against perceived infringers could also provoke these parties to assert counterclaims against us, alleging that we
infringe their intellectual property. In addition, in a patent infringement proceeding, a court may decide that a patent of ours
is invalid or unenforceable, in whole or in part, construe the patent’s claims narrowly and/or refuse to stop the other party
from using the technology at issue on the grounds that our patents do not cover the technology in question, any of which
may adversely affect our business. Even if we are successful in proving in a court of law that a third party is infringing one
or more of our issued patents or trademarks there can be no assurance that we would be successful in halting their
infringing activities, for example, through a permanent injunction, or that we would be fully or even partially financially
compensated for any harm to our business. We may be forced to enter into a license or other agreement with the infringing
third party at terms less profitable or otherwise commercially acceptable to us than if the license or agreement were
negotiated under conditions between those of a willing licensee and a willing licensor. We may not become aware of a
third-party infringer within legal timeframes for compensation or at all, thereby possibly losing the ability to be
compensated for any harm to our business. Such a third party may be operating in a foreign country where the infringer is
difficult to locate and/or the intellectual property laws may be more difficult to enforce. Some third-party infringers may be
able to sustain the costs of complex infringement litigation more effectively than we can because they have substantially
greater resources. Any inability to stop third-party infringement could result in loss in market share of some of our products
or even lead to a delay, reduction and/or inhibition of the development, manufacture or, sale of certain products by us.
There is no assurance that a product produced and sold by a third-party infringer would meet our or other regulatory
standards or would be safe for use. Such third-party infringer products could irreparably harm the reputation of our
products thereby resulting in substantial loss in market share and profits.

We may not have or be able to obtain or maintain sufficient and affordable insurance coverage to cover product

liability claims, and without sufficient coverage any claim brought against us could have a materially adverse effect on our
business, financial condition or results of operations. We run clinical trials through investigators that could be negligent
through no fault of our own and which could affect patients, cause potential liability claims against us and result in delayed
or stopped clinical trials. We are required by contractual obligations to indemnify collaborators, partners, third-party
contractors, clinical investigators, and institutions. These indemnifications could result in a material impact due to product
liability claims against us and/or these groups. We currently carry at least $10.0 million in product liability insurance,
which we believe is appropriate for our current clinical trials. Although we maintain such insurance, any claim that may be
brought against us could result in a court judgment or settlement in an amount that is not covered, in whole or in part, by
our insurance or that is in excess of the limits of our insurance coverage. Our insurance policies also have various
exclusions, and we may be subject to a product liability claim for which we have no coverage. We will have to pay any
amounts awarded by a court or negotiated in a settlement that exceed our coverage limitations or that are not covered by
our insurance, and we may not have, or be able to obtain, sufficient capital to pay such amounts. We may also need to
expand our insurance coverage as our business grows or if any of our product candidates is commercialized. We may not
be able to maintain or increase insurance coverage at a reasonable cost or in an amount adequate to satisfy any liability that
may arise.

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Our business could be negatively impacted by cyber security threats and other disruptions, including the theft of our
intellectual property, and could compromise our information and expose us to liability, which would cause our business
and reputation to suffer.

We are increasingly dependent on information technology systems and infrastructure, including mobile
technologies, to operate our business. In the ordinary course of our business, we use our data centers and our networks to
store and access confidential and proprietary business information. The information includes, among other things, our
intellectual property and proprietary information, the confidential information of our collaborators and licensees and the
personally identifiable information of our employees, and the individually identified health information of patients
participating in our clinical trials. It is important to our operations and business strategy that this electronic information
remains secure and is perceived to be secure. The size and complexity of our information technology systems, and those of
our partners and third-party vendors with whom we contract together with the volume of data we retain, make such systems
potentially vulnerable to breakdown, malicious intrusion, security breaches and other cyber-security attacks.

Information security risks have significantly increased in recent years in part due to the proliferation of new
technologies and the increased sophistication and activities of organized crime, hackers, terrorists and other external
parties, including foreign state actors. We face various cyber security threats, including cyber security attacks to our
information technology infrastructure and attempts by others to gain access to our proprietary or sensitive information. A
security breach or privacy violation that leads to disclosure or modification of or prevents access to personally identifiable
information or other protected information could harm our reputation, compel us to comply with federal and/or state breach
notification laws and foreign law equivalents, subject us to mandatory corrective action, require us to verify the correctness
of database contents and otherwise subject us to liability under laws and regulations that protect personal data, resulting in
increased costs or loss of revenue. Similarly, the loss of clinical trial data from completed or ongoing or planned clinical
trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce
the data. Moreover, a security breach that exposes our confidential intellectual property could compromise our patent
portfolio. Additionally, theft of our intellectual property or proprietary business information could require substantial
expenditures to remedy. If we are unable to prevent such security breaches or privacy violations or implement satisfactory
remedial measures, our operations could be disrupted, and we may suffer loss of reputation, financial loss and other
regulatory penalties because of lost or misappropriated information. In addition, these breaches and other inappropriate
access can be difficult to detect, and any delay in identifying them may lead to increased harm of the type described above.
Moreover, the prevalent use of mobile devices that access confidential information increases the risk of data security
breaches, which could lead to the loss of confidential information, trade secrets or other intellectual property. As cyber
threats continue to evolve, we may be required to expend significant additional resources to continue to modify or enhance
our protective measures or to investigate and remediate any information security vulnerabilities.

The procedures and controls we use to monitor these threats and mitigate our exposure may not be sufficient to

prevent cyber security incidents. The result of these incidents could have a material adverse effect on our business,
financial condition and results of operations including disrupted operations, lost opportunities, misstated financial data,
liability for stolen assets or information, increased costs arising from the implementation of additional security protective
measures, litigation and reputational damage. Any remedial costs or other liabilities related to cyber security incidents may
not be fully insured or indemnified by other means.

Compliance with global privacy and data security requirements could result in additional costs and liabilities to us or
inhibit our ability to collect and process data globally, and the failure to comply with such requirements could have a
material adverse effect on our business, financial condition or results of operations.

The regulatory framework for the collection, use, safeguarding, sharing, transfer and other processing of information

worldwide is rapidly evolving and is likely to remain uncertain for the foreseeable future. For example, the EU’s General
Data Protection Regulation (GDPR), imposes strict obligations on the processing of personal data, including personal
health data, and the free movement of such data. The GDPR applies to any company established in the EU as well as any
company outside the EU that processes personal data in connection with the offering of goods or services to individuals in
the EU or the monitoring of their behavior.

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As such, the GDPR will apply to us in connection with any clinical trials we conduct in the EU. The GDPR
enhances data protection obligations for processors and controllers of personal data, including, for example, obligations
relating to: processing health and other sensitive data; obtaining consent of individuals; providing notice to individuals
regarding data processing activities; responding to data subject requests; taking certain measures when engaging third-party
processors; notifying data subjects and regulators of data breaches; implementing safeguards to protect the security and
confidentiality of personal data; and transferring personal data to countries outside the EU, including the U.S. The GDPR
imposes substantial fines for breaches of data protection requirements, which can be up to four percent of global revenue or
20 million euros, whichever is greater, and it also confers a private right of action on data subjects for breaches of data
protection requirements. The GDPR and other changes in laws or regulations associated with the enhanced protection of
certain types of sensitive data, such as healthcare data or other personal information from our clinical trials, could require
us to change our business practices or lead to government enforcement actions, private litigation or significant penalties
against us and could have a material adverse effect on our business, financial condition or results of operations.

Additionally, California recently enacted legislation that has been dubbed the first “GDPR-like” law in the U.S.

Known as the California Consumer Privacy Act (CCPA), it creates new individual privacy rights for consumers (as that
word is broadly defined in the law) and places increased privacy and security obligations on entities handling personal data
of consumers or households. The CCPA, which went into effect on January 1, 2020, requires covered companies to provide
new disclosures to California consumers, and provides such consumers new ways to opt-out of certain sales of personal
information. The CCPA provides for civil penalties for violations, as well as a private right of action for data breaches that
is expected to increase data breach litigation. The CCPA may increase our compliance costs and potential liability. Some
observers have noted that the CCPA could mark the beginning of a trend toward more stringent privacy legislation in the
U.S., which could increase our potential liability and adversely affect our business.

We may be vulnerable to disruption, damage and financial obligation as a result of system failures.

Despite the implementation of security measures, any of the internal computer systems belonging to us, our

collaborators or our third-party service providers are vulnerable to damage from computer viruses, unauthorized access,
natural disasters, terrorism, war and telecommunication and electrical failure. Any system failure, accident or security
breach that causes interruptions in our own, in collaborators’ or in third-party service vendors’ operations could result in a
material disruption of our drug discovery and development programs. For example, the loss of clinical trial data from
completed or future clinical trials could result in delays in our or our partners’ regulatory approval efforts and significantly
increase our costs in order to recover or reproduce the lost data. To the extent that any disruption or security breach results
in a loss or damage to our data or applications, or inappropriate disclosure of confidential or proprietary information, we
may incur liability as a result, our drug discovery programs and competitive position may be adversely affected and the
further development of our product candidates may be delayed. Furthermore, we may incur additional costs to remedy the
damages caused by these disruptions or security breaches.

Our employees may engage in misconduct or other improper activities, including noncompliance with regulatory
standards and requirements and insider trading.

We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees could include

intentional failures to comply with FDA regulations, to provide accurate information to the FDA, to comply with
manufacturing standards we have established, to comply with federal and state healthcare fraud and abuse laws and
regulations, or to report financial information or data accurately or disclose unauthorized activities to us. In particular,
sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations
intended to prevent fraud, misconduct, kickbacks, self-dealing and other abusive practices. These laws and regulations may
restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive
programs and other business arrangements. Employee misconduct could also involve the improper use of information
obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to our reputation. We
have adopted a Code of Business Conduct and Ethics, but it is not always possible to identify and deter employee
misconduct, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or
unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from
a failure to be in compliance with such laws or regulations. If any such actions are instituted against us,

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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 civil, criminal, and administrative sanctions, and our reputation.

In addition, during the course of our operations our directors, executives, and employees may have access to

material, nonpublic information regarding our business, our results of operations, or potential transactions we are
considering. We may not be able to prevent a director, executive, or employee from trading in our common stock on the
basis of, or while having access to, material, nonpublic information. If a director, executive, or employee was to be
investigated or an action was to be brought against a director, executive, or employee for insider trading, it could have a
negative impact on our reputation and our stock price. Such a claim, with or without merit, could also result in substantial
expenditures of time and money, and divert attention of our management team from other tasks important to the success of
our business.

Item 1B.  Unresolved Staff Comments.

None.

Item 2.  Properties.

Our principal laboratory and administrative facilities are located in Monrovia, California, which is located in the
greater Los Angeles region. We currently lease 48,000 square feet of laboratory and office space in Monrovia, California.
The original lease was for 24,000 square feet under a lease that was set to expire in June 2020. In April and September
2020, we entered into amendments to the lease that extended the term under the original terms through October 2020. In
November 2020, we entered into an amendment to the lease which extends the lease to December 2025.

In July 2017, under a separate lease agreement, we entered into a lease for an additional 24,000 square feet of
space in the same building. The lease includes a 64-month term for the additional 24,000 square feet with an option to
renew for an additional five years at then market rates. The lease terms for the original space were not amended. In June
2017, we entered into a lease for 23,500 of office space in San Diego. The lease term has a 61-month term beginning
August 2017 and includes an option to renew for an additional five years. We believe that our existing facilities are
adequate to meet our current needs and that suitable additional alternative spaces will be available to meet future needs on
commercially reasonable terms.

 Item 3.  Legal Proceedings.

None.

 Item 4.  Mine Safety Disclosures.

Not applicable.

Item 5.  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity

PART II

Securities

Market Information

Our common stock began trading on The Nasdaq Global Market on December 3, 2013 under the symbol
“XNCR.” Prior to such time, there was no public market for our common stock. On February 16, 2021, the closing price
for our common stock as reported on the Nasdaq Global Market was $50.09.

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Holders of Record

As of February 16, 2021, we had 57,945,225 shares of common stock outstanding held by approximately 185

stockholders of record. The actual number of stockholders is greater than this number of record holders and includes
stockholders who are beneficial owners, but whose shares are held in street name by brokers and other nominees. This
number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividend Policy

We have never declared or paid any cash dividends on our common stock. We currently intend to retain all
available funds and any future earnings to support our operations and finance the growth and development of our business.
We do not intend to pay cash dividends on our common stock for the foreseeable future. Any future determination related
to our dividend policy will be made at the discretion of our Board of Directors and will depend upon, among other factors,
our results of operations, financial condition, capital requirements, contractual restrictions, business prospects and other
factors our Board of Directors may deem relevant.

Securities Authorized for Issuance Under Equity Compensation Plans

Information about our equity compensation plans is incorporated herein by reference to Item 12 of Part III of this

Annual Report.

Performance Graph

The following graph shows a comparison from December 31, 2015 through December 31, 2020 of the cumulative
total return for our common stock, the Nasdaq Biotechnology Index (NBI) and the Nasdaq Composite Index (CCMP). The
graph assumes an initial investment of $100 on December 31, 2015 and assumes reinvestment of the full amount of all
dividends, if any. The comparisons in the graph are not intended to forecast or be indicative of possible future performance
of our common stock.

The performance graph shall not be deemed to be incorporated by reference by means of any general statement incorporating
by reference this Form 10-K into any filing under the Securities Act of 1933, as amended or the Exchange Act, except to the
extent that we specifically incorporate such information by reference, and shall not otherwise be deemed filed under such acts.

Recent Sales of Unregistered Securities

There were no sales of unregistered securities during the year ended December 31, 2020.

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Purchases of Equity Securities by the Issuer and Affiliated Purchasers

None.

Item 6.  Selected Financial Data.

The selected financial data set forth below as of December 31, 2020, and 2019, and for the years ended December 31, 2020,

2019, and 2018, are derived from our audited financial statements included elsewhere in this Annual Report. This information should be
read in conjunction with those financial statements and notes thereto and with “Management’s Discussion and Analysis of Financial
Condition and Results of Operations.” The selected financial data set forth below as of December 31, 2017 and 2016 are derived from
our audited financial statements that are contained in reports previously filed with the SEC, not included herein. Periods prior to 2018
have been revised to reflect the adoption of Accounting Standards Codification Topic 606 (ASC 606) related to changes in standards for
revenue recognition. (Amounts are in thousands, except share and per share amounts).

2020

2019

Year Ended
December 31, 
2018

2017

2016

  $

 122,694

$

 156,700

$

 40,603

$

 46,150 $

 109,020

 169,802
 29,689
 199,491
 (76,797)

 7,264
 200
 7,464
 (69,333)
 —

 118,590
 24,286
 142,876
 13,824

 13,619
 (256)
 13,363
 27,187
 312

 97,501
 22,472
 119,973
 (79,370)

 9,086
 (125)
 8,961
 (70,409)
 —

 71,772  
 17,501  
 89,273  
 (43,123)  

 4,181  
 (7)  
 4,174  
 (38,949)  
 (463)

 51,872
 13,108
 64,980
 44,040

 2,070
 6
 2,076
 46,116
 991

  $

 (69,333) $

 26,875

$

 (70,409) $

 (38,486) $

 45,125

Statement of Operations:
Revenues
Operating expenses:

Research and development
General and administrative

Total operating expenses
Income (loss) from operations
Other income (expenses)
Interest income, net
Other income (expense)

Total other income, net
Net income (loss) before tax
Income tax expense (benefit)
Net income (loss) attributable to common
stockholders
Other comprehensive income (loss)
Net unrealized gain (loss) on
marketable securities

Comprehensive income (loss)

Net income (loss) per share attributed to
common stockholders (1):

 (1,087)
 (70,420) $

$

 2,132
 29,007

 837
 (69,572) $

 (367)
 (38,853) $

 (925)
 44,200

 (1.31) $
 (1.31) $

 (0.82) $
 (0.82) $

 1.09
 1.07

$

$
$

Basic
Diluted

  $
$

 (1.21) $
 (1.21) $

 0.48
 0.46

Weighted average shares of common stock
used in computed net income (loss)
attributable to common stockholders:

Basic
Diluted

 57,212,737
 57,212,737

 56,531,439
 58,467,880

 53,942,116
 53,942,116

  46,817,756   41,267,329
  46,817,756   42,388,867

(1) See Note 1 to our Annual Financial Statements appearing elsewhere in this document for a description of the method used to

calculate basic and diluted income (loss) per common share.

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Balance Sheet Data:
Cash, cash equivalents and marketable
securities
Working capital
Patents, licenses, and other intangible assets,
net
Total assets
Deferred revenue
Total stockholders’ equity

As of December 31, 
(in thousands)

2020

2019

2018

2017

2016

$  604,033
 516,611

$  601,308
   491,847

$  530,469 $  363,328
   158,229

   261,874

$  403,476
 50,720

 15,977
 703,244
 92,615
$  572,444

 14,421
   670,250
 47,131
$  593,201

 11,969
   576,732
 40,079

 11,148
   390,202
 60,118
$  521,681 $  316,464

 10,362
   429,263
 80,168
$  337,933

Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations.

You should read the following discussion and analysis together with “Item 6. Selected Financial Data” and our financial

statements and related notes included elsewhere in this Annual Report. The following discussion contains forward-looking statements
that involve risks and uncertainties. Our actual results could differ materially from those expressed or implied in any forward-looking
statements as a result of various factors, including those set forth under the caption “Item 1A. Risk Factors.”

Overview

We are a clinical-stage biopharmaceutical company focused on discovering and developing engineered
monoclonal antibody and cytokine therapeutics to treat patients with cancer and autoimmune diseases who have unmet
medical needs. We are advancing a broad portfolio of clinical-stage drug candidates from our proprietary XmAb®
technology platforms. We use our protein engineering capabilities to increase our understanding of protein structure and
interactions and to design new XmAb technologies and development candidates with improved properties. In contrast to
conventional approaches to antibody design, which focus on the segment of antibodies that interact with target antigens,
our protein engineering efforts and the XmAb technologies are focused on the Fc domain, the part of an antibody that
interacts with multiple segments of the immune system and controls antibody structure. The Fc domain is constant and
interchangeable among antibodies, and our engineered Fc domains, the XmAb technology, can be readily substituted for
natural Fc domains.

Our protein engineering capabilities and XmAb technologies enable us and our partners to develop antibodies and
biotherapeutic drug candidates with improved properties and function, which can provide innovative approaches to treating
disease and potential clinical advantage over other treatment options. For example, our capabilities have enabled us to
develop an antibody scaffold to rapidly create novel bispecific antibodies that bind two different targets simultaneously,
creating entirely new biological mechanisms. Other applications of our XmAb technologies enhance antibody performance
by increasing immune inhibitory activity, improving cytotoxicity, extending circulating half-life and stabilizing novel
protein structures, such as engineered cytokines. Currently, there are two marketed drugs that have been developed with
our XmAb technologies.

Refer to Part I, Item 1, "XmAb Bispecific Technologies" and "Other XmAb Fc Technologies" in the description of

our business included in this Annual Report on Form 10-K for a discussion of our core Fc technology platforms.

COVID-19

We are closely monitoring the COVID-19 pandemic and continue to evaluate its impact on all aspects of our

business, including how it will affect our partners, collaborations, supply chains and research and development operations.
While the pandemic did not significantly disrupt our business during the year ended December 31, 2020, the evolving
nature of the pandemic prevents us from reasonably predicting how the pandemic will affect our financial condition, results
of operations and cash flows due to numerous uncertainties. These uncertainties include the scope, severity and duration of
the pandemic, the actions taken to contain the pandemic or mitigate its impacts and the direct

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and indirect economic effects of the pandemic and containment measures, among others. Many states, including California,
where we are headquartered and where our principal place of business is located, and cities therein have instituted
quarantines, restrictions, rules and guidelines that affect the continued operation of businesses. Other countries and states
where we conduct manufacturing of our drug product, testing activities and clinical sites where patients are enrolled in our
clinical trials have enacted similar restrictions that could affect our ability to conduct our drug candidate development and
clinical operations.

The potential impacts on our business, revenue, clinical studies and research and development activities of the

COVID-19 pandemic include:

● Business: Our broad protein engineering capabilities and technologies are uniquely suited to provide us with
opportunities to identify and enhance compounds that may target the novel coronavirus and potentially treat
patients with COVID-19. Our partner Vir Biotechnology, Inc. is evaluating VIR-7831, an antibody that
targets the SARS-CoV-2 virus in a Phase 3 study. VIR-7831 incorporates our Xtend Fc technology for longer
duration of action. VIR-7832, which also targets the SARS-CoV-2 virus, also incorporates Xtend technology
and is in the preclinical stages of development.

● Revenue: We receive upfront payments, milestone payments and royalties from licensing our XmAb
technologies and drug candidates. The COVID-19 pandemic has not adversely affected our ability to
generate revenues for the year ended December 31, 2020. During the year, we received $165 million from
our partnerships and collaborations including those with MorphoSys, Alexion, Gilead, Janssen, Aimmune
and Omeros.

Our ability to earn revenue from these and other partnerships is dependent on the ability of our partners to
generate sales from products, such Ultomiris® and Monjuvi®, the ability of our partners to advance their
programs through regulatory approval, and the ability of our partners to advance our partnered programs into
later stages of development, which provide us with potential milestone payments. If the pandemic continues
for an extended period and adversely affects the sales or clinical, development and regulatory progress of
partnered programs, the amount of revenue we could earn would be adversely affected.

● Clinical studies: We are currently enrolling patients in six clinical programs, and our partner Genentech is

enrolling patients in the Phase 1 study of our co-development program XmAb306 (also known as RG6323).
Many partners are also enrolling patients in clinical trials with drug candidates that incorporate one or more
of our XmAb technologies. Although the COVID-19 pandemic has not materially affected the development
of our clinical programs for the year ended December 31, 2020, some of our clinical programs temporarily
experienced slower patient enrollment, and the initiations of new studies for certain programs have been
delayed as a result of the COVID-19 pandemic. These delays have not broadly affected the status of our
portfolio programs and have been limited to specific trials and specific sites. Many clinical sites have delayed
starting new clinical trials and others have postponed enrollment to address the pandemic.

● Research and development activities: We require all non-laboratory employees to work remotely, and we

have implemented additional health, safety and environmental procedures for all onsite laboratory research
employees. We believe we provide a safe and healthy environment for our onsite employees who have been
able to continue research operations, following an initial period of reduced onsite activities while new
policies and procedures were developed and implemented. As of December 31, 2020, these activities have
continued without interruption from the pandemic.

Our development activities include initiating a Phase 1 study of XmAb564 in healthy volunteers and
conducting IND-enabling studies for XmAb819. Several other bispecific antibody and cytokine programs are
in earlier stages of development. During the third quarter of 2020, the manufacturers of our drug supplies
notified us of critical shortages of materials used in their manufacturing processes due to pandemic-related
reallocation of resources. The shortages will not affect our current clinical programs as we have sufficient
drug supply to continue the ongoing trials without interruption. However, the shortages

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have extended the development timelines of early-stage development candidates, including XmAb819, by
three to six months based on current information from our vendors. The development timelines for additional
early-stage programs and ongoing clinical programs could be affected if the supply interruption extends
longer than current estimates.

Advancements in our Clinical Portfolio of XmAb Bispecific Antibodies and Cytokine Candidates

Our modular XmAb bispecific technology and protein engineering capabilities enable us to rapidly advance

multiple drug candidates into clinical development. We and our partners are currently enrolling Phase 1 studies for seven
wholly owned or co-development candidates to treat patients with many different types of cancer, and an eighth, to be
developed for patients with autoimmune disease, is expected to enter clinical development in early 2021.

Plamotamab (CD20 x CD3): At the ASH Annual Meeting in December 2019, we presented preliminary safety

and anti-tumor activity from the Phase 1 dose-escalation study of plamotamab in B-cell malignancies, including from
patients with relapsed or refractory NHL. The early results indicated that plamotamab was generally well tolerated and
demonstrated encouraging clinical activity as a monotherapy. We are currently enrolling patients in the ongoing
monotherapy dose-escalation study and plan to initiate additional studies in 2021.

In November 2020, we entered a strategic clinical collaboration with MorphoSys AG to investigate the
chemotherapy-free triple combination of plamotamab, tafasitamab and lenalidomide in patients with relapsed or refractory
DLBCL, first-line DLBCL and relapsed or refractory FL. Plamotamab, which redirects T cells to tumors, and tafasitamab,
a CD19-directed XmAb antibody, combine powerful and distinct immune pathways, and this collaboration is designed to
generate new clinical insights and accelerate development timelines for the program. MorphoSys and Incyte will provide
tafasitamab for the studies, which we will sponsor and fund. Tafasitamab is co-commercialized in the U.S. by MorphoSys
and Incyte and is marketed as Monjuvi. Monjuvi, the second product with XmAb technology to be approved for
commercial marketing, was approved by the U.S. FDA in July 2020.

XmAb717 (PD-1 x CTLA-4): In November 2020, we presented updated data from the Phase 1 study of XmAb717

in patients with multiple types of advanced solid tumors at the Annual Meeting of SITC. Five cohorts in the expansion
portion of the study enrolled patients with melanoma, RCC, NSCLC, CRPC and other cancers without approved
checkpoint therapies. XmAb717 was generally well-tolerated, and the most common treatment-related adverse events were
irAEs; however, rates of irAEs, including colitis, were lower than typically observed with CTLA-4 blockade. The efficacy
analysis included evaluable patients at the recommended dose level, 10.0 mg/kg. A complete response was observed in a
patient with melanoma, and partial responses were observed in multiple tumor types, including melanoma, RCC, NSCLC,
CRPC and ovarian cancer. The objective response rate across cohorts was 19%. Across the expansion cohorts,
approximately half of evaluable patients had at least 10% tumor shrinkage from baseline assessments, and nearly all these
reductions occurred in patients with prior checkpoint inhibitor treatment. The median duration of response was 119 days at
the time of the data cut off, and 24 patients remained on treatment as of September 30, 2020.

Of nine patients with prostate cancer who had baseline and follow-up PSA assessments, one achieved a PSA

reduction of greater than 50 percent. Two additional patients achieved reductions of greater than 30 percent, one of whom
had an unconfirmed partial response by RECIST. Six of these nine patients remained on therapy as of the cut-off date. In
the first half of 2021, we plan to initiate a Phase 1b study of XmAb717 for patients with certain molecular subtypes of
CRPC, as a monotherapy or in combination depending on the subtype, as these patients represent a high unmet medical
need.

Vibecotamab (CD123 x CD3): In December 2020, we presented updated data from the Phase 1 study of
vibecotamab in patients with relapsed or refractory AML at the ASH Annual Meeting. While CRS was the most common
adverse event, the majority was observed in the first dose and was generally manageable with premedication. The efficacy
analysis included evaluable patients who received a dose of at least 0.75 mcg/kg, completed at least the first cycle of
treatment and had at least one post-treatment disease assessment. Two patients achieved CR, and three patients achieved a
CR with incomplete hematologic recovery. Additionally, two patients reached a morphologic leukemia-free state, and one
patient experienced partial remission, as assessed by the investigator. The ORR was 15%. Responses

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appeared to be associated with lower baseline disease burden, indicated by patients with lower blast percentages and lower
PD1 expression on CD8+ and CD4+ T cells. Seven responders had a baseline blast count less than or equal to 25% blasts
in bone marrow. The ORR increased to 26% when using this threshold to define the population with low disease burden for
the analyses. We are continuing the dose escalation study and are reviewing data with our partner, Novartis, in planning
additional studies of vibecotamab.

Tidutamab (SSTR2 x CD3): In October 2020, we presented initial dose-escalation data from the ongoing Phase 1
study in patients with NET. Tidutamab was generally well tolerated at the recommended dose identified for the expansion
portion of the study. Peripheral blood biomarkers indicated tidutamab induced acute and sustained T-cell activation at this
dose, and a dose-dependent increase in proliferation and activation markers of CD8+ T cells was observed, which is
consistent with tidutamab’s mechanism of action. The best overall response was stable disease in the analysis to describe
clinical activity, and the median duration of treatment was approximately seven months. Completion of enrollment and
longer follow-up are required to evaluate progression-free survival and the clinical utility of tidutamab for patients with
NETs, which are an indolent, slow-growing tumor type. Considering the biomarker analysis from this study and
tidutamab’s encouraging safety profile, we plan to initiate an additional clinical study for patients with Merkel cell
carcinoma and small cell lung cancer, SSTR2-expressing tumor types known to be responsive to immunotherapy, in early
2021.

XmAb306/RO7310729 (IL15/IL15Rα-Fc Cytokine): In March 2020, Genentech dosed the first patient in a Phase 1

dose-escalation study evaluating XmAb306, our first cytokine candidate, as a single agent and in combination with
atezolizumab for patients with advanced solid tumors. XmAb306 is an IL15/IL15Rα-Fc fusion protein that incorporates
our Xtend extended half-life technology, and we are co-developing this program, as well as other potential IL-15 programs,
in collaboration with Genentech. We retain the right to perform clinical studies with XmAb306, as well as with other
collaboration programs developed in combination with other therapeutic agents, subject to certain restrictions and at our
sole expense. Genentech has dosed cohorts of the Phase 1 study of XmAb306 in combination with atezolizumab and at
least one additional combination study is currently being planned.

XmAb564 (IL2-Fc Cytokine): XmAb564 is a wholly owned IL2-Fc fusion that we intend to develop for the

treatment of patients with autoimmune diseases. In January 2021, the IND application for XmAb564 was allowed by the
FDA, and we plan to initiate a Phase 1 study in healthy volunteers in early 2021.

XmAb698 (CD38 x CD3): In 2015, Amgen licensed rights to our preclinical CD38 x CD3 bispecific antibody

program and developed AMG 424, which they evaluated in a Phase 1 study. Amgen terminated the program in the second
quarter of 2020, indicating it was stopped for adverse events that were likely CD38 target related. Under the terms of the
agreement, the rights to the CD38 program, including AMG 424, reverted to us. A new study is currently being planned to
start later this year, for the program, which we have renamed XmAb698.

Additional wholly owned XmAb bispecific antibody programs in Phase 1 clinical studies include XmAb841

(CTLA-4 x LAG-3) and XmAb104 (PD-1 x ICOS). We continue enrolling patients with advanced solid tumors to these
studies.

Advancements Expanding XmAb Bispecific Platforms

We conduct further research into the function and application of antibody Fc domains in order to expand the scope

of our XmAb technology platforms and identify additional XmAb drug candidates. We use the modularity of our XmAb
bispecific Fc technology to build bispecific antibodies and cytokines in a variety of formats, and we recently introduced
CD3 bispecific antibodies of a mixed valency format, the XmAb 2+1 bispecific antibody. XmAb 2+1 bispecific antibodies
may preferentially kill tumor cells with high target expression, which may be especially beneficial in designing antibodies
that target solid tumors. This selectivity potentially empowers CD3 bispecifics to address an expanded set of tumor
antigens. Our lead XmAb 2+1 bispecific antibody candidate is XmAb819, a first-in-class ENPP3 x CD3 bispecific
antibody. ENPP3 is a tumor-associated antigen in renal cell carcinoma (RCC) and exhibits low level expression on normal
tissues. We presented preclinical data from this program and two other XmAb 2+1 bispecific antibody programs at the
AACR Virtual Annual Meeting II in June 2020, and we plan to submit an IND application for XmAb819 in 2021.

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Additionally, we have engineered CD28 bispecific antibodies to provide conditional CD28 co-stimulation of T

cells, activating them when bound to tumor cells. Targeted CD28 bispecific antibodies may provide conditional co-
stimulation of T cells, for example, to T cells recognizing neoantigens or in concert with CD3 T-cell engaging bispecific
antibodies. Our CD28 platform is also the subject of our collaboration with Janssen Biotech, Inc., announced in December
2020, where we are creating and characterizing CD28 bispecific antibody candidates against a prostate tumor target
specified by Janssen. We are also advancing our wholly owned CD28 candidates including our lead candidate, a B7-H3 x
CD28 bispecific antibody designed to be evaluated for the treatment of patients with a range of solid tumors, and it is
currently advancing through preclinical development. We presented preclinical data from the CD28 program at the SITC
Annual Meeting in November 2020.

Progress Across Partnerships

A key part of our business strategy is to leverage our protein engineering capabilities, XmAb technologies and
drug candidates with partnerships, collaborations and licenses. Through these arrangements we generate revenues in the
form of upfront payments, milestone payments and royalties. For partnerships for our drug candidates, we aim to retain a
major economic interest in the form of keeping major geographic commercial rights; profit-sharing; co-development
options; and the right to conduct studies with drug candidates developed in the collaboration. The types of arrangements
that we have entered with partners include product licenses, novel bispecific antibody collaborations, technology licensing
agreements and strategic collaborations.

Product Licenses

Product licenses are arrangements in which we have internally developed drug candidates and, based on a
strategic review, licensed partial or full rights to third parties to continue development and potential commercialization. We
seek partners that can provide infrastructure and resources to successfully develop our drug candidates, have a track record
of successfully developing and commercializing medicines, or have a portfolio of development-stage candidates and
commercialized medicines which could potentially be developed in rational combinations with our drug candidates.

The U.S. FDA approved Monjuvi (tafasitamab-cxix), the second product with XmAb technology to be approved

for commercial marketing, in July 2020. Monjuvi is a CD19-directed cytolytic antibody indicated in combination with
lenalidomide for the treatment of certain adult patients with relapsed or refractory DLBCL, and it was created and initially
developed by us. Monjuvi is co-commercialized in the U.S. by MorphoSys and Incyte. The European Marketing
Authorization Application for tafasitamab is currently under review by the European Medicines Agency. In 2020, we
earned a total of $37.5 million in regulatory milestones and royalties of $1.5 million on net sales of Monjuvi.

In February 2020, we granted Aimmune Therapeutics, Inc., subsequently acquired by Nestlé S.A., an exclusive
worldwide license to develop and commercialize the investigational humanized monoclonal antibody XmAb7195, which
has been renamed AIMab7195. Aimmune indicated plans to develop AIMab7195 as an adjunctive treatment with its
pipeline of oral immunotherapies to explore treatment outcomes in patients with food allergies. Nestlé is solely responsible
for costs related to the development and potential commercialization of AIMab7195, and additional studies of AIMab7195
are planned. In 2020, Xencor received an upfront payment of $9.6 million in cash and Aimmune stock.

In October 2020, a second IL-15 cytokine candidate, which is engineered with a target-specific binding arm, was

approved for further preclinical exploration under our Genentech collaboration. As a Collaboration Product under the
agreement, we share in 45% of development and commercialization costs, while Genentech will pay for commercial launch
costs, and we will receive a 45% share of net profits from sales from all collaboration products, while also sharing in the
net losses at the same percentage rate. We are eligible to receive up to $180.0 million in clinical milestone payments for
this candidate.

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In November 2020, we entered into an agreement with a newly formed, privately held biotechnology company to
which we licensed the exclusive worldwide rights to develop and commercialize three preclinical-stage Fc-engineered drug
candidates for autoimmune disease: XmAb6755, XPro9523 and XmAb10717. These programs incorporate an Xtend Fc
Domain, a Cytotoxic Fc Domain, or both. We received a 15% equity interest in the company, and we will also receive
royalties on net sales of approved products in the mid-single digit to mid-teen percentage range.

Novel Bispecific Antibody Collaborations

Novel bispecific antibody collaborations are arrangements in which our partner seeks to create a bispecific

antibody using one or more of our XmAb bispecific technologies. Our partners provide an antibody or a tumor-associated
antigen, and we conduct limited research and development to create potential bispecific antibody candidates for further
development and commercialization by our partners.

In November 2020, we entered an agreement with Janssen Biotech, Inc., focused on the discovery of XmAb
bispecific antibodies against CD28, an immune co-stimulatory receptor on T cells, and an undisclosed prostate tumor
target, for the potential treatment of patients with prostate cancer. Additionally, we have a right to access select, predefined
agents from Janssen’s portfolio of clinical-stage drug candidates and commercialized medicines to evaluate potential
combination therapies in prostate cancer with agents in our own pipeline, subject to some limitations. Janssen has the same
right with our portfolio to evaluate potential combination therapies in prostate cancer, as well. The ability to study
combinations of therapies from both companies’ prostate cancer portfolios leverages our broad clinical pipeline and
Janssen's leading prostate cancer therapeutics portfolio. In 2020, we received a $50 million upfront payment from Janssen.

In 2020, we received a $2.5 million milestone payment related to our agreement with Astellas Pharma, Inc., which

has advanced an XmAb bispecific candidate into IND enabling studies. Under our March 2019 agreement with Astellas,
we applied our XmAb bispecific Fc technology to an antigen pair provided by Astellas and generated bispecific antibody
candidates for further development by Astellas. In 2019, we completed delivery of the bispecific candidates to Astellas for
further development and potential commercialization.

Other XmAb bispecific antibodies being developed by our partners include Amgen's AMG 509, a STEAP1 x CD3

XmAb 2+1 bispecific antibody, which being evaluated in a Phase 1 study for patients with prostate cancer, and an
undisclosed bispecific antibody candidate being developed by Novartis, which is also in Phase 1 development.

Technology License Agreements

We enter into technology licensing agreements in which we license access to one or more of our XmAb Fc

technologies on a restricted basis, typically to an XmAb Cytotoxic Fc Domain and/or the Xtend Fc Domain. Our partners
are responsible for all research, development and commercialization activities of the drug candidates. The plug-and-play
nature of XmAb technologies allows us to license access to our platforms with limited or no internal research and
development activities.

Alexion’s Ultomiris uses Xtend Fc technology for longer half-life. Ultomiris has received marketing

authorizations from regulatory agencies in the U.S., Europe and Japan for the treatment of adult patients with paroxysmal
nocturnal hemoglobinuria (PNH) and for patients with atypical hemolytic uremic syndrome (aHUS). Alexion is also
evaluating Ultomiris in a broad late-stage development program across many indications in neurology and nephrology. In
2020, we earned $16.2 million in royalties and $10.0 million in sales-based milestone payments from Alexion.

In January 2020, we entered an agreement with Gilead Sciences, Inc., under which Gilead has access to our Xtend

and Cytotoxic XmAb Fc technologies for developing and commercializing elipovimab (GS-9722), Gilead’s effector-
enhanced broadly neutralizing anti-HIV antibody, as well as up to three additional anti-HIV antibodies. In 2020, Gilead
exercised all three options. Gilead has advanced elipovimab and GS-9723 into Phase 1 clinical studies. In 2020, we
received $13.5 million in upfront and option payments from Gilead.

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In March 2020, we entered a second agreement with Vir Biotechnology, Inc., under which Vir has non-exclusive
access to our Xtend Fc technology to extend the half-life of novel antibodies being investigated as potential treatments for
patients with COVID-19, as well as prophylactic use against infection from the SARS-CoV-2 virus. Vir has commenced a
Phase 3 clinical study of VIR-7831 for the early treatment of COVID-19 patients who are at high risk of hospitalization
and has indicated plans to initiate a clinical study of VIR-7832 in the near future.

In August 2020, we entered into an agreement with Omeros Corporation, under which we provided Omeros a

non-exclusive license to access our Xtend Fc technology, an exclusive license to apply Xtend Fc technology to an
identified antibody and options to apply Xtend Fc technology to three additional antibodies. In 2020, we received an
upfront payment of $5.0 million from Omeros.

In December 2020, we entered into an agreement with MiRagen Therapeutics, Inc., in which we provided
MiRagen a non-exclusive license to our Xtend Fc technology and an exclusive license to apply our Xtend Fc technology to
antibodies targeting IGF-1R. MiRagen subsequently changed its name to Viridian Therapeutics, Inc. We received an
upfront payment of 322,407 shares of Viridian common stock valued at $6.0 million.

Strategic Collaborations

We enter into strategic collaborations where we can create synergies between our partners' strengths and assets

and our own protein engineering capabilities, XmAb technologies and XmAb drug candidates. Through these arrangements
we seek to create new drug candidates, investigate novel combination therapies and potentially identify additional
indications for our portfolio of XmAb drug candidates.

In July 2020, we entered an agreement with Atreca, Inc., to research, develop and commercialize novel CD3
bispecific antibodies as potential therapeutics in oncology. We are conducting a three-year research program in which
Atreca will provide antibodies against novel tumor targets through its discovery platform from which we will engineer
XmAb bispecific antibodies that bind to the CD3 receptor on T cells. Up to two joint programs are eligible to be mutually
selected for further development and commercialization, with each partner sharing 50% of costs and profits. Each company
has the option to lead development, regulatory and commercialization activities for one of the two joint programs. In
addition, the agreement allows each partner the option to pursue up to two programs independently, with a mid- to high-
single digit percent royalty payable on net sales to the other partner.

In September 2020, we entered an agreement with The University of Texas MD Anderson Cancer Center, under

which we will design and execute new investigator-sponsored clinical studies with our portfolio of XmAb drug candidates.
We are committing $10.0 million in funding and supporting these studies over an initial five-year term.

In November 2020, we entered the clinical collaboration with MorphoSys and Incyte to investigate the

combination of plamotamab, tafasitamab and lenalidomide in patients with relapsed or refractory DLBCL, first-line
DLBCL and relapsed or refractory follicular lymphoma (FL).

In December 2020, we entered into a second agreement with MD Anderson to develop novel CD3 bispecific

antibody therapeutics for the potential treatment of patients with cancer. MD Anderson will work to identify and develop
potential antibodies, and we will apply its our Fc bispecific technology to create therapeutic candidates. MD Anderson will
then conduct and fund all preclinical activities to advance candidates toward clinical studies. We have certain exclusive
options to license worldwide rights to develop and commercialize potential new medicines arising from the collaboration.

Refer to Part IV, Item 15, Note 10, "Collaboration and Licensing Agreements" of the notes to our consolidated

financial statements included in this Annual Report on Form 10-K for a description of the key terms of our arrangements.

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Financial Operations Overview

Revenues

Our revenues to date have been generated primarily from our collaboration agreements, our product licensing

agreements, and our technology licensing agreements. Revenue recognized from our collaboration and product licensing
agreements includes non-refundable upfront payments, milestone payments and royalties on net sales of approved products
while revenue from our technology licensing agreements includes upfront payments, option payments to obtain
commercial licenses, milestone payments and royalties on net sales of approved products. Since our inception through
December 31, 2020, we have generated $545.6 million in revenues under the various product development partnership and
technology license arrangements. Several of our product development partnership and technology license agreements
provide us the opportunity to earn future milestone payments, royalties on product sales and option exercise payments.

Summary of Collaboration and Licensing Revenue by Partner

The following is a comparison of collaboration, product licensing and technology licensing revenue for the years

ended December 31, 2020, 2019 and 2018 (in millions):

Aimmune
Amgen
Alexion
Astellas
Genentech
Gilead
MiRagen/Viridian
MorphoSys
Novartis
Omeros
Vir
Private BioCo
Total

Year Ended
December 31, 
2019

2018

2020

$

$

 9.6     
 —
 26.2
 3.5
 3.5
 13.5
 6.0
 39.0
 —
 5.0
 0.3
 16.1
 122.7

$

$

 —     
 5.0
 13.0
 14.0
 113.9
 —
 —
 —
 10.0
 —
 0.8
 —
 156.7

$

$

 —
 0.6
 20.0
 —
 —
 —
 —
 —
 20.0
 —
 —
 —
 40.6

Research and Development Expenses

The following is a comparison of research and development expenses for the years ended December 31, 2020,

2019, and 2018 (in millions):

External research and development expenses
Internal research and development expenses
Stock based compensation
Total

Year Ended
December 31, 
2019

 52.2      $
 43.4
 23.0
 118.6

$

2020

 94.2      $
 54.7
 20.9
 169.8

$

2018

 48.2
 36.5
 12.8
 97.5

     $

$

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Internal research and development expenses consist primarily of salaries, benefits, related personnel costs,

supplies, and allocated overhead including facility costs. External research and development expenses include preclinical
testing costs, clinical trial costs and fees paid to external service providers. External service providers include contract
research organizations (CRO) and contract manufacturing organizations (CMO) to conduct clinical trials, manufacturing
and process development, IND-enabling toxicology testing and formulation of clinical drug supplies. We expense research
and development expenses as incurred. We account for nonrefundable advance payments for goods and services that will
be used in future research and development activities as expense when the service has been performed or when the goods
have been received. We estimate contract manufacturing, preclinical study and clinical trial expenses based on the services
performed pursuant to the contracts with manufacturing, research institutions and clinical research organizations that
manufacture and conduct and manage preclinical studies and clinical trials on our behalf based on the actual time and
expenses incurred by them. We accrue expenses related to clinical trials based on the level of patient enrollment and
activity according to the related agreement. We monitor patient enrollment levels and related activity to the extent
reasonably possible and adjust estimates accordingly. Our estimates of clinical trial expense have fluctuated on a period-to-
period basis due to changes in the stage of the clinical trials and patient enrollment levels. We expect to experience a
continuing pattern of fluctuations in clinical trial expenses as current clinical trials are completed and as we initiate
additional and later stage clinical trials. To date, we have not experienced significant differences between our periodic
estimates of clinical trial expense and the actual costs incurred. We expect changes in future clinical trial expenses to be
driven by changes in service provider costs and changes in clinical stage and patient enrollment.

We expect that our future research and development expenses will increase overspending levels in recent years if

we are successful in advancing our current clinical-stage drug candidates or any of our preclinical programs into later
stages of clinical development. The process of conducting preclinical studies and clinical trials necessary to obtain
regulatory approval is costly and time-consuming. We or our partners may never succeed in achieving marketing approval
for any of our product candidates. Numerous factors may affect the probability of success for each product candidate,
including preclinical data, clinical data, competition, manufacturing capability, approval by regulatory authorities and
commercial viability.

Our research and development operations are conducted such that design, management and evaluation of results
of all of our research and development is performed internally, while the execution of certain phases of our research and
development programs, such as toxicology studies in accordance with Good Laboratory Practices (GLP), and
manufacturing in accordance with current Good Manufacturing Practices (cGMP), is accomplished using CROs and
CMOs. We account for research and development costs on a program-by-program basis except in the early stages of
research and discovery, when costs are often devoted to identifying preclinical candidates and improving our discovery
platform and technologies, which are not necessarily allocable to a specific development program. We assign costs for such
activities to distinct projects for preclinical pipeline development and new technologies. We allocate research management,
overhead, commonly used laboratory supplies and equipment, and facility costs based on the percentage of time of full-
time research personnel efforts on each program.

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The following is a comparison of research and development expenses for the years ended December 31, 2020,

2019 and 2018 (in millions):

Product programs:

Obexelimab (XmAb5871)

Bispecific programs:
CD3 programs:
Vibecotamab*
Plamotamab
Tidutamab
XmAb819 (ENPP3 x CD3)

Total CD3 programs

Tumor microenvironment (TME) activator programs:

XmAb717
XmAb104
XmAb841

Total TME activator programs

Cytokine programs:

XmAb306/RG6323*
XmAb564

Total cytokine programs

Subtotal bispecific programs

Other, research and early stage programs

Year Ended
December 31, 
2019

2018

2020

$

 2.9

$

 17.5

$

 23.0

 12.4
 33.8
 14.9
 7.4
 68.5

 26.4
 13.3
 10.6
 50.3

 12.0
 15.4
 27.4

 146.2

 20.7

 11.6
 12.3
 11.4
 0.5
 35.8

 13.0
 7.8
 7.4
 28.2

 17.0
 5.0
 22.0

 86.0

 15.1

 9.3
 5.6
 7.8
 —
 22.7

 8.7
 14.5
 9.9
 33.1

 7.7
 —
 7.7

 63.5

 11.0

Total research and development expenses

$

 169.8

$

 118.6

$

 97.5

*Includes net payments to, and reimbursements from our partners pursuant to agreements that include cost-sharing arrangements.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries and related benefits, including stock-based

compensation related to our executive, finance, business development, and support functions. Other general and
administrative expenses include intellectual property costs, facility costs, and professional fees for auditing, tax and legal
services.

Other Income, Net

For the years ended December 31, 2020, 2019 and 2018, other income, net consists primarily of interest income

from our investments during the years.

Critical Accounting Policies, Significant Judgments and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our

financial statements, which have been prepared in accordance with accounting principles generally accepted in the United
States (GAAP). The preparation of our financial statements in conformity with GAAP requires our management to make
estimates and assumptions that affect the amounts and disclosures reported in the financial statements and

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accompanying notes. Actual results could differ materially from those estimates. Our management believes judgment is
involved in determining revenue recognition, the fair value-based measurement of stock-based compensation, the fair value
estimate of marketable securities, the capitalization and recoverability of intellectual property costs, valuation of deferred
tax assets and accruals. Our management evaluates estimates and assumptions as facts and circumstances dictate. As future
events and their effects cannot be determined with precision, actual results could differ from these estimates and
assumptions, and those differences could be material to the financial statements. If our assumptions change, we may need
to revise our estimates, or take other corrective actions, either of which may also have a material adverse effect on our
statements of operations, liquidity and financial condition.

While our significant accounting policies are described in more detail in Note 1 to our financial statements

included elsewhere in this Annual Report, we believe the following accounting policies to be critical to the judgments and
estimates used in the preparation of our financial statements.

Revenue Recognition

We have, to date, earned revenue from research and development collaborations, which may include research and

development services, licenses of our internally developed technologies, licenses of our internally developed drug
candidates, or combinations of these.

The terms of our license and research and development and collaboration agreements generally include non-

refundable upfront payments, research funding, co-development reimbursements, license fees, and milestone and other
contingent payments to us for the achievement of defined collaboration objectives and certain clinical, regulatory and
sales-based events, as well as royalties on sales of any commercialized products.

The terms of our licensing agreements include non-refundable upfront fees, contractual payment obligations for

the achievement of pre-defined preclinical, clinical, regulatory and sales-based events by our partners. The licensing
agreements also include royalties on sales of any commercialized products by our partners.

In certain transactions for licensing of our technologies or our product candidates, we may receive an equity

interest from our partners as full or partial consideration for an upfront payment due under the arrangement. We record the
initial equity at its fair value and mark the value to market quarterly for publicly traded securities and review for
impairment for equity that is not publicly traded on a national exchange.

 Capitalized Intellectual Property Costs

We capitalize and amortize third-party intellectual property costs such as amounts paid to outside patent counsel

for filing, prosecuting and obtaining patents for our internally developed technologies and product candidates, to the extent
such patents are deemed to have probable future economic benefit. We also capitalize amounts paid to third parties for
licenses that we acquire for intellectual property or for research and development purposes where the technology has
alternative uses. The net capitalized patents, licenses and other intangible assets as of December 31, 2020 and 2019 was
$16.0 million and $14.4 million, respectively. We believe that these costs should be capitalized as the intellectual property
portfolio creates the underlying property right to our technologies and product candidates and supports the upfront
payments, licensing fees, milestone payments and royalties made by our collaboration partners for licensing our
technologies and product candidates.

We begin amortization of capitalized patent costs during the period that we obtain a patent relating to the

capitalized cost over the shorter of the patent life or the estimated economic useful life. Capitalized licensing costs are
amortized beginning in the period that access to the license or technology is available and is amortized over the shorter of
the license term or the estimated economic useful life of the licensed asset. Such amortization is recorded as general and
administrative expenses.

On a regular basis we review the capitalized intellectual property portfolio and determine if there have been

changes in the scientific or patent landscape that leads us to decide to abandon an in-process patent application or abandon
a previously issued patent. While we confer with outside patent counsel, the decision to continue prosecuting

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certain patent claims or abandon other claims are made by us based on our judgment and existing knowledge of our
technology, current U.S. and foreign patent authority rulings and expected rulings, and scientific advances and patent
filings by competitors operating in our technology or drug development field. We record an expense for the write-off of
capitalized intangible assets in the period that the decision to abandon a claim or license is made. We also review the
carrying value of capitalized licensing costs on a regular basis to determine if there have been any changes to the useful life
or estimated amortization period over which the costs should be amortized. We recorded a charge for abandoned intangible
assets of $0.5 million, $0.2 million and $0.2 million for the years ended December 31, 2020, 2019 and 2018, respectively.
Such charges are reflected as general and administrative expenses.

We determine if there has been an impairment of our intangible assets which include the capitalized patent and
licensing costs whenever events such as recurring operating losses or changes in circumstances indicate that the carrying
amount of the assets may not be recoverable.

Accrued Research and Development Expenses

As part of the process of preparing our financial statements, we are required to estimate our accrued research and
development expenses. This process involves reviewing contracts and purchase orders, reviewing the terms of our license
agreements, communicating with our applicable personnel to identify services that have been performed on our behalf, and
estimating the level of service performed and the associated cost incurred for the service when we have not yet been
invoiced or otherwise notified of actual cost. The majority of our service providers invoice us monthly in arrears for
services performed. We make estimates of our accrued expenses as of each balance sheet date based on facts and
circumstances known to us at that time. We periodically confirm the accuracy of our estimates with the service providers
and make adjustments if necessary. Examples of estimated accrued research and development expenses include fees to:

● CROs and other service providers in connection with clinical studies;

● contract manufacturers in connection with the production of and testing of clinical trial materials; and

● vendors in connection with preclinical development activities.

We base our expenses related to clinical studies on our estimates of the services received and efforts expended

pursuant to contracts with multiple research institutions and contract research organizations that conduct and manage
clinical studies on our behalf. The financial terms of these agreements are subject to negotiation, vary from contract to
contract, and may result in uneven payment flows and expense recognition. Payments under some of these contracts
depend on factors such as the successful enrollment of patients and the completion of clinical trial milestones. In accruing
these costs, we estimate the time period over which services will be performed for which we have not been invoiced and
the level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort
varies from our estimate, we adjust the accrual accordingly. Our understanding of the status and timing of services
performed relative to the actual status and timing of services performed may vary and may result in our reporting changes
in estimates in any particular period.

Income Taxes

Deferred tax assets and liabilities are determined based on differences between the financial reporting and tax

basis of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when
the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized
as income in the period that such tax rate changes are enacted. The measurement of a deferred tax asset is reduced, if
necessary, by a valuation allowance if it is more likely than not that some portion or all of the deferred tax asset will not be
realized. Financial statement recognition of a tax position taken or expected to be taken in a tax return is determined based
on a more-likely-than not threshold of that position being sustained. If the tax position meets this threshold, the benefit to
be recognized is measured as the largest amount that is more than 50% likely to be realized upon ultimate settlement. Our
policy is to record interest and penalties related to uncertain tax positions as a component of

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income tax expense. We have concluded that there are no material uncertain tax positions and have not recorded an income
tax expense or liability for uncertain tax positions as of December 31, 2020.

On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (TCJA) was enacted into law, which beginning in

2018, made several changes to U.S. corporate income tax provisions including a reduction in the U.S. corporate rate from a
maximum rate of 35% to 21% effective January 1, 2018. The TCJA also allowed net operating losses incurred after
January 1, 2018 to be carried forward indefinitely.

The other material change in our tax provision from the TCJA is elimination of the U.S. corporate alternative

minimum tax (AMT) system and allowance for a tax refund for AMT credit carryovers as of December 31, 2017, which do
not expire. We received a tax refund of $0.8 million in each of 2019 and 2020 related to federal AMT credit carryovers.

We recorded net deferred tax assets of $106.0 million as of December 31, 2020, which was fully offset by a

valuation allowance due to uncertainties surrounding our ability to realize these tax benefits. The deferred tax assets are
primarily comprised of deferred revenue, federal and state tax net operating loss (NOL) carryforwards and research and
development tax credit carryforwards. As of December 31, 2020, we had cumulative net operating loss carryforwards for
federal income tax purposes of approximately $213.6 million; $68.0 million of such losses were incurred prior to
December 31, 2017 and $145.6 million were incurred in the years ending on or after December 31, 2018. We also had
available tax credit carryforwards of $26.7 million for federal tax purposes. We had cumulative state tax loss carryforwards
at December 31, 2020 of $161.4 million, and available state tax credit carryforwards of approximately $14.3 million, which
can be carried forward to offset future taxable income, if any.

Our federal net operating loss carryforwards incurred prior to January 1, 2018 expire starting in 2026; state net

operating loss carryforwards expire starting in 2035; and federal tax credit carryforwards begin to expire starting in 2020.
Approximately $0.3 million of federal tax credits will expire if unused from 2020 through 2024.

No income tax expense or benefit was recorded for the year ended December 31, 2020. We recorded an income

tax expense of $0.3 million related to state AMT for the year ended December 31, 2019, and no income tax expense or
benefit was recorded for the year ended December 31, 2018.

Valuation of Stock-Based Compensation

We record the fair value of stock options and shares issued under our Employee Stock Purchase Plan (ESPP) to

employees as of the grant date as compensation expense over the service period, which is generally the vesting period. For
non-employees, we also record the fair value of stock options as of the grant date as compensation expense over the service
period. We then periodically re-measure the awards to reflect the current fair value at each reporting period until the non-
employee completes the performance obligation or the date on which a performance commitment is reached. Expense is
recognized over the related service period.

We calculate the fair value of stock-based compensation awards using the Black-Scholes option-pricing model.
The Black-Scholes option-pricing model requires the use of subjective assumptions, including volatility of our common
stock, the expected term of our stock options, the risk-free interest rate for a period that approximates the expected term of
our stock options and the fair value of the underlying common stock on the date of grant.

Common Stock Options Fair Value

We recognize stock-based compensation expense in accordance with the provisions of ASC Topic 718,

Compensation—Stock Compensation. The use of a Black-Scholes model requires us to apply judgment and make
assumptions and estimates that include the following:

● Expected Volatility—Volatility is a measure of the amount by which a financial variable such as a share price

has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period.

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● Expected Dividend Yield—We have never declared or paid dividends and have no plans to do so in the

foreseeable future.

● Risk-Free Interest Rate—This is the U.S. Treasury rate for the week of each option grant during the year,

having a term that most closely resembles the expected life of the option.

● Expected Term—This is the period of time that the options granted are expected to remain unexercised.

Options granted have a maximum term of ten years and we have estimated the expected life of the option
term to be between six and eight years. We use a simplified method to calculate the average expected term
for employee awards.

Results of Operations

Comparison of the 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

millions):

Revenues:

Research collaboration
Milestone
Licensing
Royalties
Total revenues
Operating expenses:

Research and development
General and administrative

Total operating expenses
Other income, net
Income tax expense
Net income (loss)

Revenues

Year ended
December 31, 
2019

2020

Change

$

$

 4.5
 50.2
 50.2
 17.8
 122.7

 169.8
 29.7
 199.5
 7.5
 —
 (69.3)

$

$

 16.3
 23.2
 112.2
 5.0
 156.7

 118.6
 24.3
 142.9
 13.4
 0.3
 26.9

$

$

 (11.8)
 27.0
 (62.0)
 12.8
 (34.0)

 51.2
 5.4
 56.6
 (5.9)
 (0.3)
 (96.2)

Research collaboration revenues in 2020 and 2019 represent revenue recognized under our Genentech and

Astellas agreements.

Milestone payments increased by $27.0 million in 2020 over 2019 amounts primarily due to receiving milestones

from Alexion, Astellas, and MorphoSys in 2020 compared to milestones received from Amgen, Alexion, and Novartis in
2019.

Licensing revenues in 2020 primarily consist of revenues recognized from various technology and product license
agreements entered throughout the year, and licensing revenues in 2019 primarily consist of revenues recognized from our
Genentech agreement.

Royalty revenues for 2020 represent revenue recognized from our Alexion and MorphoSys agreements while

royalty revenues in 2019 represent royalties from our Alexion agreement.

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Research and Development Expenses

The following table summarizes our research and development expenses for the years ended December 31, 2020

and 2019 (in millions):

Product programs:

Obexelimab (XmAb5871)

Bispecific programs:
CD3 programs:
Vibecotamab*
Plamotamab
Tidutamab
XmAb819 (ENPP3 x CD3)

Total CD3 programs

Tumor microenvironment (TME) activator programs:

XmAb717
XmAb104
XmAb841

Total TME activator programs

Cytokine programs:

XmAb306/RG6323*
XmAb564

Total cytokine programs

Subtotal bispecific programs

Other, research and early stage programs

Year Ended
December 31, 
2019

2020

Change

$

 2.9

$

 17.5

$

 (14.6)

 12.4
 33.8
 14.9
 7.4
 68.5

 26.4
 13.3
 10.6
 50.3

 12.0
 15.4
 27.4

 146.2

 20.7

 11.6
 12.3
 11.4
 0.5
 35.8

 13.0
 7.8
 7.4
 28.2

 17.0
 5.0
 22.0

 86.0

 15.1

 0.8
 21.5
 3.5
 6.9
 32.7

 13.4
 5.5
 3.2
 22.1

 (5.0)
 10.4
 5.4

 60.2

 5.6

Total research and development expenses

$

 169.8

$

 118.6

$

 51.2

*Includes net reimbursements from our partners pursuant to agreements that include cost-sharing arrangements.

Research and development expenses increased by $51.2 million in 2020 over 2019 amounts as we continue to

expand our pipeline of bispecific antibody and cytokine candidates. Increased research and development spending in 2020
was driven by increased spending on our plamotamab, XmAb819, XmAb717 and XmAb564 programs and was partially
offset by lower spending on our obexelimab program during the year.

General and Administrative Expenses

General and administrative expenses increased by $5.4 million in 2020 over 2019 amounts primarily due to an

increase in staffing, professional expenses and spending on intellectual property and licenses.

Other Income, Net

Other income, net decreased by $5.9 million in 2020 over 2019 amounts reflecting decreases in interest income

earned on our investments in marketable securities, due to declining in interest rates in 2020.

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Comparison of the Years Ended December 31, 2019 and 2018

The following table summarizes our results of operations for the year ended December 31, 2019 and 2018 (in

millions):

Revenues:

Research collaboration
Milestone
Licensing
Royalties
Total revenues
Operating expenses:

Research and development
General and administrative

Total operating expenses
Other income, net
Income tax benefit
Net income (loss)

Revenues

Year Ended
December 31, 
2018

2019

Change

$

$

 16.3
 23.2
 112.2
 5.0
 156.7

 118.6
 24.3
 142.9
 13.4
 0.3
 26.9

$

$

 20.1
 20.5
 —
 —
 40.6

 97.5
 22.5
 120.0
 9.0
 —
 (70.4)

$

$

 (3.8)
 2.7
 112.2
 5.0
 116.1

 21.1
 1.8
 22.9
 4.4
 0.3
 97.3

Research collaboration revenues in 2019 represent revenue recognized under our Genentech and Astellas
agreements while the research collaboration revenues in 2018 represent revenue recognized under our Novartis Agreement.

Milestone payments increased by $2.7 million in 2019 over 2018 amounts primarily due to receiving contractual

milestones in 2019 from Amgen, Alexion and Novartis compared to contractual milestones received primarily from
Alexion in 2018.

Licensing revenues in 2019 primarily consist of revenues recognized from our Genentech agreement.

Royalty revenues for 2019 represent royalty revenue recognized from our Alexion agreement.

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Research and Development Expenses

The following table summarizes our research and development expenses for the years ended December 31, 2019

and 2018 (in millions):

Product programs:

Obexelimab (XmAb5871)

Bispecific programs:
CD3 programs:
Vibecotamab*
Plamotamab
Tidutamab
XmAb819 (ENPP3 x CD3)

Total CD3 programs

Tumor microenvironment (TME) activator programs:

XmAb717
XmAb104
XmAb841

Total TME activator programs

Cytokine programs:

XmAb306/RG6323*
XmAb564

Total cytokine programs

Subtotal bispecific programs

Other, research and early stage programs

Year Ended
December 31, 

2019

2018

Change

$

 17.5

$

 23.0

$

 (5.5)

 11.6
 12.3
 11.4
 0.5
 35.8

 13.0
 7.8
 7.4
 28.2

 17.0
 5.0
 22.0

 86.0

 15.1

 9.3
 5.6
 7.8
 —
 22.7

 8.7
 14.5
 9.9
 33.1

 7.7
 —
 7.7

 63.5

 11.0

 2.3
 6.7
 3.6
 0.5
 13.1

 4.3
 (6.7)
 (2.5)
 (4.9)

 9.3
 5.0
 14.3

 22.5

 4.1

Total research and development expenses

$

 118.6

$

 97.5

$

 21.1

*Includes net payments from our partners pursuant to agreements that include cost-sharing arrangements.

Research and development expenses increased by $21.1 million in 2019 over 2018 amounts as we continue to
expand our pipeline of bispecific antibody and cytokine candidates. Increased spending on our CD3 bispecific and our
cytokine programs offset reduced spending on our TME activator candidates during the year.

General and Administrative Expenses

General and administrative expenses increased by $1.8 million in 2019 over 2018 amounts primarily due to an

increase in facility costs, staffing and intellectual property costs.

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Other Income, Net

Other income, net increased by $4.4 million in 2019 over 2018 amounts reflecting additional interest income

earned on our investments in marketable securities, which is due to higher investment balances as a result of our upfront
proceeds received from our Genentech and Astellas agreements in March 2019.

Liquidity and Capital Resources

Since our inception, our operations have been primarily financed through proceeds from public offering, private

sales of our equity, and payments received under our collaboration and development partnerships and licensing
arrangements. We have devoted our resources to funding research and development programs, including discovery
research, preclinical and clinical development activities.

We have incurred substantial operating losses since our inception, and we expect to continue to incur operating

losses into the foreseeable future as we advance the ongoing development of our bispecific antibody and cytokine product
candidates, evaluate opportunities for the potential clinical development of our other preclinical programs, and continue
our research efforts.

In 2020, we received a total of $165 million in upfront payments, milestones and royalties in connection with

licensing of our technologies and products.

In March 2019, we received a total of $135.0 million in upfront payment in connection with our Genentech and

Astellas collaboration agreements.

In March 2018, we completed the sale of 8,395,000 shares of common stock which included shares that we issued
pursuant the underwriters’ exercise of their over-allotment option pursuant to a follow-on public offering. We received net
proceeds of $245.5 million, after deducting underwriters’ discounts and offering expenses.

At December 31, 2020, we had $604.0 million of cash, cash equivalents and marketable debt securities compared
to $601.3 million at December 31, 2019. We expect to continue to receive additional payments from our collaborators for
research and development services rendered, additional milestone, contingent payments, opt-in and royalty payments. Our
ability to receive milestone payments and contingent payments from our partners is dependent upon either our ability or
our partners’ abilities to achieve certain levels of research and development activities and is therefore uncertain at this time.

Funding Requirements

We have not generated any revenue from product sales and do not expect to do so until we obtain regulatory
approval and commercialize one or more of our product candidates. As we are currently in the early clinical stages of
development, it will be some time before we expect to achieve this, and it is uncertain that we ever will. We expect that our
operating expenses will continue to increase in connection with ongoing as well as additional planned clinical and
preclinical development of product candidates in our pipeline. We expect to continue our collaboration arrangements and
will look for additional collaboration and licensing opportunities.

Although it is difficult to predict our funding requirements, based upon our current operating plan, we believe that

our existing cash, cash equivalents and marketable securities, together with interest thereon and expected milestone and
royalty payments will be sufficient to fund our operations into 2024. We have based these estimates on assumptions that
may prove to be wrong, and we could use our capital resources sooner than we currently expect.

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 Cash Flows

The following table sets forth the primary sources and uses of cash and cash equivalents for each of the periods

presented below (in thousands):

Net cash provided by (used in):

Operating activities
Investing activities
Financing activities

Net increase in cash and cash equivalents

Operating Activities

Year Ended December 31, 
2019

2020

2018

$

$

 (5,004)
 100,192
 18,044
 113,232

$

$

 64,374
 (50,970)
 10,662
 24,066

$

$

 (79,756)
 (164,767)
 254,241
 9,718

Net cash used by operating activities for the year ended December 31, 2020 reflects that upfront and milestone

payments and royalties received in the year funded a majority of the operating expenses incurred during the year. Net cash
provided by operating activities for the year ended December 31, 2019 reflects upfront and milestone payments received in
excess of operating expenses, while net cash used in operations for the years ended December 31, 2018 reflects operating
expenses in excess of milestone payments primarily for advancing our pipeline of bispecific antibody candidates during
such years.

Investing Activities

Investing activities consist primarily of proceeds from maturities of marketable securities offset by purchases of

marketable securities available-for-sale, acquisition of intangible assets and purchases of property and equipment. In 2020,
we redeemed $114.0 million of marketable securities, net of $643.7 million of purchase. In 2019, we purchased $39.9
million of marketable securities, net of $456.9 million of proceeds from sales and maturities. In 2018, we purchased $155.7
million in marketable securities, net of $222.1 million of proceeds from sale and maturities. We acquired $3.2 million, $3.7
million and $1.9 million of intangible assets in the years ended December 31, 2020, 2019 and 2018, respectively. We
purchased $10.5 million, $7.4 million and $7.2 million of capital equipment for the years ended December 31, 2020, 2019
and 2018 respectively. The increase in capital expenditure in 2020 compared to 2019 and 2018 is primarily due to facility
improvements for our laboratory facilities.

Financing Activities

Net cash provided by financing activities during the year ended December 31, 2020 and 2019 consists primarily of

cash from stock option exercises and the sales of shares under the ESPP.

Net cash provided by financing activities during the year ended December 31, 2018 consists primarily of net

proceeds from our March 2018 follow-on public offering and cash from stock option exercises and the sale of shares under
the ESPP.

Contractual Obligations and Commitments

The following table summarizes our contractual obligations at December 31, 2020 (in thousands):

Payments due by period

Operating lease obligation relating to facilities (1)

     $

Less
than
1 year

Total
 6,645      $  2,428      $  2,800      $  1,417      $

1 - 3
Years

3 - 5
Years

More
than
5 years  
 —

(1) Consists of operating leases on our corporate headquarters in Monrovia, CA encompassing two floors of 24,000 square feet each

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that expire in December 2025 and September 2022, respectively, and on our San Diego, CA offices encompassing 24,000 square
feet that expires in August 2022.

We are obligated to make future payments to third parties under in-license agreements, including sublicense fees,

royalties, and payments that become due and payable on the achievement of certain development and commercialization
milestones. We have also entered into agreements with third party vendors which will require us to make future payments
upon the delivery of goods and services in future periods.

In February 2015, we entered into a license agreement with BIO-TECHNE Corporation (BIO-TECHNE) for a

non-exclusive license to certain antibody technology including monoclonal antibodies which recognize human
somatostatin receptor 2 (SSTR2). The variable domain of this antibody is incorporated in our tidutamab drug candidate.
Under this license agreement, we may be required to make $3.8 million in additional contingent payments which include
$800,000 of clinical milestones and $3.0 million of regulatory milestones, in addition to royalties upon commercial sales of
products of less than 1%. We made an upfront payment of $200,000 in connection with this license and made a Phase 1
milestone payment of $100,000 in 2018. We have not made any additional milestone payments under this arrangement.

We entered into a second agreement with BIO-TECHNE, effective February 2018, for a non-exclusive license to a

certain recombinant monoclonal antibody reactive with human programmed death protein, PD-1. Under this license
agreement, we may be required to make $22.0 million in additional contingent payments which include $1.5 million of
clinical milestones, $4.5 million of regulatory milestones and milestones on the achievement of certain sales of $16.0
million, in addition to royalties upon commercial sales of products of 1%. We made an upfront payment in connection with
this license in 2019 and have not made any additional payments under this license agreement.

In November 2015, we entered into a worldwide exclusive commercial license agreement with Selexis SA to
develop and commercialize products produced from the Selexis cell line that was manufactured in connection with our
vibecotamab drug candidate. We made an upfront payment of 50,000 Swiss Francs (CHF) in connection with the license
and may be required to make CHF 1.7 million in additional contingent obligations which include CHF 500,000 in
development milestones, CHF 400,000 in regulatory milestones and CHF 800,000 in sales milestones, in addition to
royalties upon commercial sales of products of less than 1%. During 2016, we made a CHF 100,000 milestone payment in
connection with an IND submission. There were no additional milestone payments made under this license agreement.

In February 2016, we entered into a worldwide exclusive commercial license agreement with Selexis SA to

develop and commercialize products produced from the Selexis cell line that was manufactured in connection with our
plamotamab drug candidate. In connection with the license, we may be required to make CHF 1.7 million in additional
contingent obligations which include CHF 500,000 in development milestones, CHF 400,000 in regulatory milestones and
CHF 800,000 in sales milestones, in addition to royalties upon commercial sales of products of less than 1%. During 2016,
we made a CHF 100,000 milestone payment in connection with an IND submission. There were no additional milestone
payments made under this license agreement.

In December 2017, we entered into worldwide exclusive commercial license agreements with Selexis to develop
and commercialize products produced from the Selexis cell line that was manufactured for each of our bispecific antibody
and cytokine drug candidates: tidutamab, XmAb717, XmAb841, XmAb104, XmAb306, XmAb564 and XmAb819. The
terms for each agreement are identical and for each licensed cell line we may be required to make up to CHF 1.4 million in
total development, regulatory and sales milestones which include CHF 425,000 in development milestones, CHF 340,000
in regulatory milestones and CHF 680,000 in sales milestones. In addition, we may be obligated to pay royalties upon
commercial sales of approved products of less than 1%. In 2018, we made three milestone payments of CHF 85,000 each
in connection with three separate IND submissions. In 2019, we made a milestone payment of CHF 75,000 in connection
with an IND submission, and in 2020, we recorded a milestone payment due of CHF 75,000 in connection with an IND
submission.

In December 2012, we entered into a Cross-License Agreement with MedImmune, LLC (MedImmune) for a non-
exclusive license to certain MedImmune patents related to half-life technology. Under the terms of the agreement, we may
be obligated to make contingent payments in connection with the use of our Xtend™ technology, including use

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by us in our development candidates and also for use by our licensees. These contingent payments total $250,000 per
program and include $150,000 in clinical milestones and $100,000 in regulatory milestones. In addition, we may be
obligated to make contingent payments for tiered sales milestones on the sale of approved products from $20,000 per year
to $1.0 million per year. Our obligations to make payments under this agreement expire in December 2021. We made
milestone payments under this agreement of $125,000, $75,000 and $375,000 for 2018, 2019 and 2020, respectively.

As the amount and timing of sublicense fees and the achievement and timing of these milestones are not probable

and estimable, such commitments have not been included on our balance sheet or in the contractual obligations and
commitment tables above.

 Off-Balance Sheet Arrangements

We did not have during the periods presented, and we do not currently have, any off-balance sheet arrangements.

New Accounting Pronouncements

See Note 1 - Recent Accounting Pronouncements in the accompanying financial statements for information

regarding recent accounting pronouncements.

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk

Our primary exposure to market risk is interest income sensitivity, which is affected by changes in the general

level of U.S. interest rates. Due to the short-term duration of our investment portfolio and the low risk profile of our
investments, an immediate 10.0% change in interest rates would not have a material effect on the fair market value of our
portfolio. Accordingly, we would not expect our operating results or cash flows to be affected to any significant degree by
the effect of a sudden change in market interest rates on our investment portfolio.

We do not believe that our cash, cash equivalents and marketable securities have significant risk of default or

illiquidity. While we believe our cash, cash equivalents and marketable securities do not contain excessive risk, we cannot
provide absolute assurance that in the future our investments will not be subject to adverse changes in market value. In
addition, we maintain significant amounts of cash and cash equivalents at one or more financial institutions that are in
excess of federally insured limits.

Inflation generally affects us by increasing our cost of labor and clinical trial costs. We do not believe that

inflation has had a material effect on our results of operations during the periods presented.

Item 8.  Financial Statements and Supplementary Data

Xencor, Inc.
Financial Statements

Audited Financial Statements for the Years Ended December 31, 2020, 2019 and 2018:

Report of Independent Registered Public Accounting Firm
Balance Sheets
Statements of Comprehensive Income (Loss)
Statements of Stockholders’ Equity
Statements of Cash Flows
Notes to Financial Statements

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79
80
81
82
83

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of
Xencor, Inc.

Opinion on the Financial Statements
We have audited the accompanying balance sheets of Xencor, Inc. (the Company) as of December 31, 2020 and 2019, the
related statements of comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the
period ended December 31, 2020, and the related notes to the financial statements. In our opinion, the financial statements
present fairly, in all material respects, the financial position of the Company as of December 31, 2020 and 2019, and the
results of its operations and its cash flows for each of the three years in the period ended December 31, 2020, in conformity
with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United
States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2020, based on criteria
established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the
Treadway Commission in 2013, and our report, dated February 23, 2021, expressed an unqualified opinion on the
effectiveness of the Company’s internal control over financial reporting.

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 PCAOB
and are required to be independent with respect to the Company in accordance with 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 audits to obtain reasonable assurance about whether the financial statements are free of material misstatement,
whether due to error or fraud. 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-period audit 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 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 accounts or disclosures to which it relates.

Revenue Recognition—Collaboration and Licensing Agreements
As discussed in Note 10 to the financial statements, the Company entered into collaboration and licensing agreements
during the year ended December 31, 2020. These contracts contain multiple performance obligations. Management’s
identification of the performance obligations requires significant judgment, including whether the performance obligations
are distinct and capable of being distinct, which requires management to evaluate whether the customer can benefit from
the good or service on its own, or together with other resources readily available to the customer. Management applies
significant judgment in determining the revenue recognition for these collaboration and licensing contracts including the
identification of and accounting for all performance obligations and the calculation of the standalone selling price (SSP) for
each identified performance obligation. The Company’s estimate of SSP for each performance obligation within these
customer contracts requires management to consider many factors, including

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external market data as well as an estimate of future profitability.  For each performance obligation identified, the 
Company recognizes revenue upon transfer of control of promised intellectual property and technology licenses or upon 
delivery of research and development services to its collaboration and licensing partners in an amount that reflects the 
consideration the Company expects to receive in exchange for those licenses or services. 

We identified the Company’s revenue recognition related to the collaboration and licensing agreements as a critical audit
matter because auditing the identification and accounting for performance obligations, and the calculation of the SSP for
each performance obligation, required significant audit effort and a high degree of auditor judgment and subjectivity to
perform our audit procedures and evaluate the audit evidence obtained.

Our audit procedures related to the Company’s collaboration and licensing contracts included the following, among others:

● We obtained and read the collaboration and licensing agreements and evaluated the completeness of the

performance obligations identified by management, and performed an evaluation of whether these performance
obligations were distinct and capable of being distinct.

● We obtained an understanding of the relevant controls related to the collaboration and licensing contracts and
tested such controls for design, implementation and operating effectiveness, including management review
controls related to identifying distinct performance obligations and when transfer of control is satisfied, and
determining the SSP over each of the identified performance obligations.

● We tested management’s process used to estimate the SSP by evaluating the models, including testing the
accuracy and completeness of data used, and reasonableness of assumptions applied by management.

● As each contract has multiple performance obligations, we also tested the allocation of the transaction price to

each performance obligation based upon the SSP.

We have served as the Company’s auditor since 2015.

/s/ RSM US LLP

Los Angeles, California
February 23, 2021

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of
Xencor, Inc.

Opinion on Internal Control Over Financial Reporting
We have audited Xencor, Inc.’s (the Company) internal control over financial reporting as of December 31, 2020, based on
criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of
the Treadway Commission in 2013. In our opinion, the Company maintained, in all material respects, effective internal
control over financial reporting as of December 31, 2020, based on criteria established in Internal Control—Integrated
Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United
States) (PCAOB), the balance sheets of the Company as of December 31, 2020 and 2019, the related statements of
comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the period ended
December 31, 2020, of the Company and our report, dated February 23, 2021, expressed an unqualified opinion.

Basis for Opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its
assessment of the effectiveness of internal control over financial reporting in the accompanying Management’s Report on
Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control
over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to
be independent with respect to the Company in accordance with U.S. federal securities laws and the applicable rules and
regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform
the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in
all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing
the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control
based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the
circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with
accounting principles generally accepted in the United States of America (U.S. GAAP). A company’s internal control over
financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable
detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable
assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with U.S.
GAAP, and that receipts and expenditures of the company are being made only in accordance with authorizations of
management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection
of unauthorized acquisition, use or disposition of the Company’s assets that could have a material effect on the financial
statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. 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.

/s/ RSM US LLP

Los Angeles, California
February 23, 2021

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Xencor, Inc.

Balance Sheets

(in thousands, except share and per share data)

December 31, 

2020

2019

Assets
Current assets

Cash and cash equivalents
Marketable securities
Equity securities
Accounts receivable
Income tax receivable
Contract asset
Prepaid expenses and other current assets

Total current assets
Property and equipment, net
Patents, licenses, and other intangible assets, net
Marketable securities - long term
Equity securities - long term
Income tax receivable
Right of use asset
Other assets
Total assets
Liabilities and stockholders’ equity
Current liabilities

Accounts payable
Accrued expenses
Lease liabilities
Deferred revenue
Total current liabilities
Lease liabilities, net of current portion
Deferred revenue, net of current portion
Total liabilities
Commitments and contingencies (see note 9)
Stockholders’ equity

$ 163,544
434,156
5,303
11,443
—
12,500
10,726
637,672
21,682
15,977
1,030
16,071
—
10,600
212
$ 703,244

$

8,954
17,603
1,889
92,615
121,061
9,739

—  

130,800

$
50,312
  479,470
—
21,574
502
—
6,547
  558,405
15,805
14,421
71,526
—
402
9,380
311
$ 670,250

$

10,189
8,995
2,169
45,205
66,558
8,565
1,926
77,049

Preferred stock, $0.01 par value: 10,000,000 authorized shares; -0- issued and
outstanding shares at December 31, 2020 and 2019
Common stock, $0.01 par value: 200,000,000 authorized shares; 57,873,444 issued
and outstanding shares at December 31, 2020 and 56,902,301 issued and outstanding
at December 31, 2019
Additional paid-in capital
Accumulated other comprehensive income
Accumulated deficit
Total stockholders’ equity
Total liabilities and stockholders’ equity

—

—

580
937,525
74
  (365,735)
572,444
$ 703,244

569
  887,873
1,161
  (296,402)
  593,201
$ 670,250

See accompanying notes to the financial statements.

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Xencor, Inc.

Statements of Comprehensive Income (Loss)

(in thousands, except share and per share data)

Revenue
Collaborations, licenses, milestones and royalties
Operating expenses

Research and development
General and administrative

Total operating expenses
Income (loss) from operations
Other income (expense)
Interest income, net
Other income (expense)

Total other income, net

Income (loss) before income tax
Income tax expense
Net income (loss)
Other comprehensive income (loss)

Net unrealized gain (loss) on marketable securities available-for-sale

Comprehensive income (loss)

Net income (loss) per share attributable to common stockholders:

Basic
Diluted

Weighted average shares used to compute net income (loss) per share
attributable to common stockholders:

Basic
Diluted

Year ended December 31, 
2019

2018

2020

$

122,694

$

156,700

$

40,603

169,802
29,689
199,491
(76,797)

7,264
200
7,464

(69,333)
—
(69,333)

(1,087)
(70,420)

(1.21)
(1.21)

$

$
$

118,590
24,286
142,876
13,824

13,619
(256)
13,363

27,187
312
26,875

2,132
29,007

0.48
0.46

$

$
$

97,501
22,472
119,973
(79,370)

9,086
(125)
8,961

(70,409)
—
(70,409)

837
(69,572)

(1.31)
(1.31)

$

$
$

57,212,737
57,212,737

  56,531,439
  58,467,880

  53,942,116
  53,942,116

See accompanying notes to the financial statements.

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Xencor, Inc.

Statements of Stockholders’ Equity

(in thousands, except share data)

Stockholders’ Equity
Balance, December 31, 2017
Sale of common stock, net of issuance cost
Issuance of common stock upon exercise of
stock awards
Issuance of common stock under the Employee
Stock Purchase Plan
Comprehensive loss
Stock-based compensation
Balance, December 31, 2018
Issuance of common stock upon exercise of
stock awards
Issuance of common stock under the Employee
Stock Purchase Plan
Issuance of restricted stock units
Comprehensive income
Stock-based compensation
Balance, December 31, 2019
Issuance of common stock upon exercise of
stock awards
Issuance of common stock under the Employee
Stock Purchase Plan
Issuance of restricted stock units
Comprehensive loss
Stock-based compensation
Balance, December 31, 2020

Common Stock

Shares
47,002,488
8,395,000

Amount
470
84

Additional
Paid
in-Capital
570,670
245,420

Accumulated
Other

Comprehensive Accumulated

Income

(1,808)
—

Deficit
(252,868)
—

Total
Stockholders’
Equity
316,464
245,504

824,731

8

7,609

57,323
—
—
56,279,542

1
—
—
563

1,119
—
20,548
845,366

543,887

5

9,264

67,561
11,311
—
—
56,902,301

858,470

50,318
62,355
—
—
57,873,444

1
—
—
—
569

9

1
1
—
—

1,392
—
—
31,851
887,873

16,608

1,426
(1)
—
31,619

$ 580 $ 937,525 $

—

—
837
—
(971)

—

—

2,132
—
1,161

—

—

7,617

—
(70,409)
—
(323,277)

—

—

26,875
—
(296,402)

1,120
(69,572)
20,548
521,681

9,269

1,393
—
29,007
31,851
593,201

—

16,617

—
—
(1,087)
—
74 $

—
—
(69,333)
—

(365,735) $

1,427
—
(70,420)
31,619
572,444

See accompanying notes to the financial statements.

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Xencor, Inc.

Statements of Cash Flows

(in thousands)

Cash flows from operating activities

Net income (loss)
Adjustments to reconcile net income (loss) to net cash provided by (used in)
operating activities:

Depreciation and amortization
Amortization of premium on marketable securities
Stock-based compensation
Abandonment of capitalized intangible assets
Loss on disposal of assets
Loss (gain) on sale of marketable securities available-for-sale
Equity received in connection with license agreement
Cash redemption of equity received in connection with license agreement
Change in fair value of equity security

Changes in operating assets and liabilities:

Accounts receivable
Interest receivable
Prepaid expenses and other current assets
Income tax receivable
Contract asset and deposits
Accounts payable
Accrued expenses
Deferred rent
Income tax payable
Lease liabilities and ROU assets
Deferred revenue

Net cash provided by (used in) operating activities
Cash flows from investing activities

Proceeds from sale and maturities of marketable securities available-for-sale
Proceeds from sale of property and equipment
Purchase of marketable securities
Purchase of intangible assets
Purchase of property and equipment
Proceeds from repayment of loan receivable
Net cash provided by (used in) investing activities
Cash flows from financing activities

Proceeds from issuance of common stock upon exercise of stock awards
Proceeds from issuance of common stock from Employee Stock Purchase Plan
Proceeds from issuance of common stock
Common stock issuance costs

Net cash provided by financing activities
Net increase in cash and cash equivalents
Cash and cash equivalents, beginning of year
Cash and cash equivalents, end of year
Supplemental disclosures of cash flow information

Cash paid for:

Interest
Taxes

Supplemental Schedule of Noncash Investing Activities

Net unrealized gain (loss) on marketable securities available-for-sale

Year ended December 31, 
2019

2020

2018

$

(69,333)

$

26,875

$

(70,409)

5,794
(272)
31,619
535
4
(153)
(26,660)
5,390
(105)

10,131
1,190
(4,170)
895
(12,401)
(1,235)
8,608
—
—
(325)
45,484
(5,004)

757,617
1
(643,658)
(3,229)
(10,539)
—
100,192

16,617
1,427
—
—
18,044
113,232
50,312
163,544

15
—

(1,087)

4,298
(4,321)
31,851
221
8
—
—
—
—

(11,321)
(387)
3,828
704
—
6,392
(667)
(1,513)
—
1,354
7,052
64,374

456,923
—
(496,855)
(3,685)
(7,353)
—
(50,970)

9,269
1,393
—
—
10,662
24,066
26,246
50,312

11
400

2,132

3,251
(394)
20,548
239
102
74
—
—
—

(9,045)
(535)
(4,769)
(84)
(46)
(3,072)
4,182
398
(157)
—
(20,039)
(79,756)

222,125
9
(377,840)
(1,935)
(7,212)
86
(164,767)

7,617
1,120
260,245
(14,741)
254,241
9,718
16,528
26,246

16
233

837

$

$
$

$

$

$
$

$

$

$
$

$

See accompanying notes to the financial statements.

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1. Summary of Significant Accounting Policies

Description of Business

Xencor, Inc. (we, us, our, or the Company) was incorporated in California in 1997 and reincorporated in Delaware
in September 2004. We are a clinical-stage biopharmaceutical company focused on discovering and developing engineered
monoclonal antibody and cytokine therapeutics to treat patients with cancer and autoimmune diseases who have unmet
medical needs. We create our product candidates using our proprietary XmAb technology platforms, which focus on the
portion of an antibody that interacts with multiple segments of the immune system, referred to as the Fc domain, which is
constant and interchangeable among antibodies. Our engineered Fc domains, the XmAb technology, can increase antibody
immune inhibition, improve cytotoxicity, extend half-life and most recently are used to create bispecific antibodies and
cytokines.

Our operations are based in Monrovia, California and San Diego, California.

Basis of Presentation

The Company’s financial statements as of December 31, 2020, 2019, and 2018 and for the years then ended have

been prepared in accordance with accounting principles generally accepted in the United States (U.S.).

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United
States of America requires management to make estimates and assumptions that affect the amounts reported in the financial
statements and accompanying notes. Significant estimates include useful lives of long-lived assets, the periods over which
certain revenues and expenses will be recognized including collaboration revenue recognized from non-refundable upfront
licensing payments, the amount of non-cash compensation costs related to share-based payments to employees and non-
employees and the period over which these costs are expensed.

Recent Accounting Pronouncements

Pronouncements adopted in 2020

Effective January 1, 2020, the Company adopted ASU No. 2016-13, Financial Instruments – Credit Losses (Topic
326): Measurement of Credit Losses on Financial Instruments, as well as ASU No, 2018-19, Codification Improvements to
Topic 326, Financial Instruments – Credit Losses. The standard amends guidance on reporting credit losses for assets held
at amortized cost basis and also provides an available-for-sale (AFS) debt security impairment model that is a modified
version of the other-than-temporary-impairment (OTTI) model. The AFS debt security impairment model no longer allows
consideration of the length of time during which the fair value has been less than its amortized cost when determining
whether a credit loss exists. The adoption of this standard did not have any impact on the Company’s financial statements.

Effective January 1, 2020, the Company adopted ASU No. 2018-13, Fair Value Measurement (Topic 820):
Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the
disclosures for transfers between Level 1 and Level 2 of the fair value hierarchy, modifies the Level 3 disclosure
requirements for non-public entities and requires additional disclosure for Level 3 fair value hierarchy. The adoption of this
standard did not have any impact on the Company’s financial statements.

Effective January 1, 2020, the Company adopted ASU No. 2018-18, Collaborative Arrangements (Topic 808):
Clarifying the Interaction Between Topic 808 and Topic 606, which provides guidance on how to assess whether certain
transactions between collaborative arrangement participants should be accounted for within the revenue recognition
standard. The adoption of this standard did not have any impact on the Company’s financial statements.

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Pronouncements not yet effective

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for

Income Taxes, which is effective for fiscal years beginning after December 15, 2020, and interim periods within those
fiscal years. The standard removes specific exceptions to the general principles in Topic 740 and simplifies the accounting
for income taxes. The Company does not anticipate that the standard will have a significant impact on its financial
statements.

In January 2020, the FASB issued ASU No. 2020-01, which clarifies that a company should consider observable

transactions that require a company to either apply or discontinue the equity method of accounting under Topic 323,
Investment – Equity Method and Joint Ventures, for the purposes of applying the measurement alternative in accordance
with Topic 321, Investments – Equity Securities immediately before applying or upon discontinuing the equity method.
The amendment is effective for fiscal years beginning after December 15, 2020. The Company does not anticipate that the
standard will have a significant impact on its financial statements.

In October 2020, the FASB issued ASU No. 2020-10, Codification Improvements, which amends a variety of

topics in the Accounting Standards Codification to improve consistency and clarify guidance. The amendment is effective
for fiscal years beginning after December 15, 2020. The Company is currently evaluating the amendment and does not
anticipate that it will have an impact on its financial statements.

Revenue Recognition

We have, to date, earned revenue from research and development collaborations, which may include research and

development services, licenses of our internally developed technologies, licenses of our internally developed drug
candidates, or combinations of these.

The terms of our license, research and development and collaboration agreements generally include non-
refundable upfront payments, research funding, co-development payments and reimbursements, license fees, and milestone
and other contingent payments to us for the achievement of defined collaboration objectives and certain clinical, regulatory
and sales-based events, as well as royalties on sales of any commercialized products.

The terms of our licensing agreements include non-refundable upfront fees, annual licensing fees, and contractual

payment obligations for the achievement of pre-defined preclinical, clinical, regulatory and sales-based events by our
partners. The licensing agreements also include royalties on sales of any commercialized products by our partners.

We recognize revenue through the five-step process in accordance with ASC 606 Revenue Recognition 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.

Deferred Revenue

Deferred revenue arises from payments received in advance of the culmination of the earnings process. We have

classified deferred revenue for which we stand ready to perform within the next 12 months as a current liability. We
recognize deferred revenue as revenue in future periods when the applicable revenue recognition criteria have been met.
The total amounts reported as deferred revenue were $92.6 million and $47.1 million at December 31, 2020 and 2019,
respectively.

Research and Development Expenses

Research and development expenses include costs we incur for our own and for our collaborators’ research and

development activities. Research and development costs are expensed as incurred. These costs consist primarily of salaries
and benefits, including associated stock-based compensation, laboratory supplies, facility costs, and applicable overhead
expenses of personnel directly involved in the research and development of new technology and products, as

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well as fees paid to other entities that conduct certain research development activities on our behalf. We estimate
preclinical study and clinical trial expenses based on the services performed pursuant to the contracts with research
institutions and clinical research organizations that conduct and manage preclinical studies and clinical trials on our behalf
based on the actual time and expenses incurred by them. Further, we accrue expenses related to clinical trials based on the
level of patient enrollment and activity according to the related agreement. We monitor patient enrollment levels and
related activity to the extent reasonably possible and adjust estimates accordingly.

We capitalize acquired research and development technology licenses and third-party contract rights where such

assets have an alternative use and amortize the costs over the shorter of the license term or the expected useful life. We
review the license arrangements and the amortization period on a regular basis and adjust the carrying value or the
amortization period of the licensed rights if there is evidence of a change in the carrying value or useful life of the asset.

Cash and Cash Equivalents

We consider cash equivalents to be only those investments which are highly liquid, readily convertible to cash and

which mature within three months from the date of purchase.

Marketable and Equity Securities

The Company has an investment policy that includes guidelines on acceptable investment securities, minimum

credit quality, maturity parameters and concentration and diversification. The Company invests its excess cash primarily in
marketable debt securities issued by investment grade institutions.

The Company considers its marketable debt securities to be available-for-sale and does not intend to sell these

securities, and it is not more likely than not the Company will be required to sell the securities before recovery of the
amortized cost basis. These assets are carried at fair value and any impairment losses and recoveries related to the
underlying issuer’s credit standing are recognized within other income (expense), while non-credit related impairment
losses and recoveries are recognized within accumulated other comprehensive income (loss). There were no impairment
losses or recoveries recorded for the years ended in December 31, 2020 and 2019, respectively. Accrued interest on
marketable debt securities is included in marketable securities’ carrying value. Accrued interest was $1.4 million and $2.7
million at December 31, 2020 and 2019, respectively. Each reporting period, the Company reviews its portfolio of
marketable debt securities, using both quantitative and qualitative factors, to determine if each security’s fair value has
declined below its amortized cost basis.

The Company receives equity securities in connection with certain licensing transactions with its partners. These

investments in an equity security are carried at fair value with changes in fair value recognized each period and reported
within other income (expense). For equity securities with a readily determinable fair value, the Company remeasures these
equity investments at each reporting period until such time that the investment is sold or disposed. If the Company sells an
investment, any realized gains or losses on the sale of the securities will be recognized within other income (expense) in
the Statement of Comprehensive Income (Loss) in the period of sale.

The Company also has an investment in an equity security without a readily determinable fair value, where the

Company elects the measurement alternative to record at its initial cost minus impairment, plus or minus changes resulting
from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.

Concentrations of Risk

Cash, cash equivalents and marketable debt securities are financial instruments that potentially subject the
Company to concentrations of risk. We invest our cash in corporate debt securities and U.S. sponsored agencies with strong
credit ratings. We have established guidelines relative to diversification and maturities that are designed to help ensure
safety and liquidity. These guidelines are periodically reviewed to take advantage of trends in yields and interest rates.

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Cash and cash equivalents are maintained at financial institutions, and at times, balances may exceed federally

insured limits. We have never experienced any losses related to these balances. Amounts on deposit in excess of federally
insured limits at December 31, 2020 and 2019 approximated $163.3 million and $50.0 million, respectively.

We have payables with one service provider that represent 49% of our total payables and with two service
providers that represented 48% of our total payables at December 31, 2020 and 2019, respectively. We rely on three critical
suppliers for the manufacture of our drug product for use in our clinical trials. While we believe that there are alternative
vendors available, a change in manufacturing vendors could cause a delay in the availability of drug product and result in a
delay of conducting and completing our clinical trials. No other vendor accounted for more than 10% of total payables at
December 31, 2020 or 2019.

Fair Value of Financial Instruments

Our financial instruments primarily consist of cash and cash equivalents, marketable debt securities, accounts
receivable, accounts payable and accrued expenses. Marketable debt securities and cash equivalents are carried at fair
value. The fair value of the other financial instruments closely approximate their fair value due to their short maturities.

The Company accounts for recurring and non-recurring fair value measurements in accordance with FASB

Accounting Standards Codification (ASC) 820, Fair Value Measurements and Disclosures (ASC 820). ASC 820 defines
fair value, establishes a fair value hierarchy for assets and liabilities measured at fair value, and requires expanded
disclosure about fair value measurements. The ASC 820 hierarchy ranks the quality of reliable inputs, or assumptions, used
in the determination of fair value and requires assets and liabilities carried at fair value to be classified and disclosed in one
of the following three categories:

Level 1—Fair value is determined by using unadjusted quoted prices that are available in active markets

for identical assets or liabilities.

Level 2—Fair value is determined by using inputs other than Level 1 quoted prices that are directly or

indirectly observable. Inputs can include quoted prices for similar assets or liabilities in active
markets or quoted prices for identical assets or liabilities in markets that are not active. Related
inputs can also include those used in valuation or other pricing models, such as interest rates and
yield curves that can be corroborated by observable market data.

Level 3—Fair value is determined by inputs that are unobservable and not corroborated by market data.
Use of these inputs involves significant and subjective judgments to be made by the reporting
entity –e.g. determining an appropriate discount factor for illiquidity associated with a given
security.

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The Company measures the fair value of financial assets using the highest level of inputs that are reasonably

available as of the measurement date. The assets recorded at fair value are classified within the hierarchy as follows for the
periods reported (in thousands):

Money Market Funds in Cash and Cash
Equivalents
Corporate Securities
Government Securities
Equity Securities with Readily Determinable Fair
Value
Equity Securities without Readily Determinable
Fair Value

Money Market Funds in Cash and Cash
Equivalents
Corporate Securities
Government Securities

December 31, 2020

Total
Fair Value

Level 1

Level 2

Level 3

158,937
119,833
315,353

$

158,937
—
—

5,303

5,303

16,071
615,497

—
164,240

$

$

$

— $

119,833
315,353

—

—
—
—

—

—
435,186

$

16,071
16,071

December 31, 2019

Total
Fair Value

Level 1

Level 2

Level 3

32,009
281,751
269,245
583,005

$

$

32,009
—
—
32,009

$

$

— $

281,751
269,245
550,996

$

—
—
—
—

$

$

$

$

The Company holds equity securities without readily determinable fair value as of December 31, 2020. The

Company elects the measurement alternative to record at its initial cost minus impairment, plus or minus changes resulting
from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.

Property and Equipment

Property and equipment are recorded at cost and depreciated using the straight-line method over the estimated

useful lives of the assets. Expenditures for repairs and maintenance are charged to expense as incurred, while renewals and
improvements are capitalized. Useful lives by asset category are as follows:

Computers, software and equipment
Furniture and fixtures
Leasehold improvements

3 - 5 years
5 - 7 years
5 - 7 years or remaining
lease term, whichever is less

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Patents, Licenses, and Other Intangible Assets

The cost of acquiring licenses is capitalized and amortized on the straight-line basis over the shorter of the term of

the license or its estimated economic life, ranging from 5 to 25 years. Third-party costs incurred for acquiring patents are
capitalized. Capitalized costs are accumulated until the earlier of the period that a patent is issued, or we abandon the patent
claims. Cumulative capitalized patent costs are amortized on a straight-line basis from the date of issuance over the shorter
of the patent term or the estimated useful economic life of the patent, ranging from 13 to 20 years. Our senior management,
with advice from outside patent counsel, assesses three primary criteria to determine if a patent will be capitalized initially:
i) technical feasibility, ii) magnitude and scope of new technical function covered by the patent compared to the company’s
existing technology and patent portfolio, particularly assessing the value added to our product candidates or licensing
business, and iii) legal issues, primarily assessment of patentability and prosecution cost. We review our intellectual
property on a regular basis to determine if there are changes in the estimated useful life of issued patents and if any
capitalized costs for unissued patents should be abandoned. Capitalized patent costs related to abandoned patent filings are
charged off in the period of the decision to abandon. During 2020, 2019 and 2018, we abandoned previously capitalized
patent and licensing related charges of $0.5 million, $0.2 million and $0.2 million, respectively.

The carrying amount and accumulated amortization of patents, licenses, and other intangibles is as follows (in

thousands):

Patents, definite life
Patents, pending issuance
Licenses and other amortizable intangible assets
Nonamortizable intangible assets (trademarks)
Total gross carrying amount
Accumulated amortization—patents
Accumulated amortization—licenses and other
Total intangible assets, net

December 31, 

2020

12,038     
8,432
2,560
399
23,429
(5,791)
(1,661)
15,977

$

$

2019
10,597
7,266
2,510
399
20,772
(4,912)
(1,439)
14,421

$

$

Amortization expense for patents, licenses, and other intangible assets was $1.1 million, $0.9 million and $0.9

million for the years ended December 31, 2020, 2019 and 2018, respectively.

Future amortization expense for patent, licenses, and other intangible assets recorded as of December 31, 2020,

and for which amortization has commenced, is as follows:

2021
2022
2023
2024
2025
Thereafter
Total

Year ended
December 31, 
(in thousands)

947
906
829
667
589
3,208
7,146

$

$

The above amortization expense forecast is an estimate. Actual amounts of amortization expense may differ from
estimated amounts due to additional intangible asset acquisitions, impairment of intangible assets, accelerated amortization
of intangible assets, and other events. As of December 31, 2020, the Company has $8.4 million of intangible assets which
are in-process and have not been placed in service, and accordingly amortization on these assets has not commenced.

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Long-Lived Assets

Management reviews long-lived assets which include fixed assets and amortizable intangibles for impairment
whenever events or changes in circumstances indicate that the carrying amount of an asset (or asset group) may not be
recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to
undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the
impairment to be recognized is measured as the amount by which the carrying amount of the assets exceeds the fair value
of the assets.

We did not recognize a loss from impairment for the years ended December 31, 2020, 2019 or 2018.

Income Taxes

We account for income taxes in accordance with accounting guidance which requires an asset and liability

approach to financial accounting and reporting for income taxes. Deferred income tax assets and liabilities are computed
annually for differences between the financial statement and tax bases of assets and liabilities that will result in taxable or
deductible amounts in the future based on enacted tax laws and rates applicable to the periods in which the differences are
expected to affect taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the
amount expected to be realized. Income tax expense is the tax payable or refundable for the period plus or minus the
change during the period in deferred tax assets and liabilities.

We assess our income tax positions and record tax benefits for all years subject to examination based upon our

evaluation of the facts, circumstances and information available at the reporting date. For those tax positions where there is
greater than 50% likelihood that a tax benefit will be sustained, we have recorded the largest amount of tax benefit that
may potentially be realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant
information. For those income tax positions where there is a 50% or less likelihood that a tax benefit will be sustained, no
tax benefit has been recognized in the financial statements. We did not have any material uncertain tax positions at
December 31, 2020 or 2019.

Our policy is to recognize interest and penalties on taxes, if any, as a component of income tax expense.

The Tax Cuts and Jobs Act of 2017 (TCJA) enacted on December 22, 2017 included several key provisions

impacting the accounting for and reporting of income taxes. The most significant provisions reduced the U.S. corporate
statutory tax rate from 35% to 21%, eliminated the corporate Alternative Minimum Tax (AMT) system, and made changes
to the carryforward of net operating losses beginning on January 1, 2018. The tax reform provided for a refund of unused
AMT carryforwards for years beginning after December 31, 2017. We received an income tax refund during the years
ended December 31, 2020 and 2019 of $0.8 million each year related to our federal AMT carryforwards.

Stock-Based Compensation

We recognize compensation expense using a fair-value-based method for costs related to all share-based
payments, including stock options, restricted stock units (RSUs), and shares issued under our Employee Stock Purchase
Plan (ESPP). Stock-based compensation cost related to employees and directors is measured at the grant date, based on the
fair-value-based measurement of the award using the Black-Scholes method, and is recognized as expense over the
requisite service period on a straight-line basis. We account for forfeitures when they occur. We recorded stock-based
compensation and expense for stock-based awards to employees, directors and consultants of approximately $31.6 million,
$31.9 million and $20.5 million for the years ended December 31, 2020, 2019 and 2018 respectively. Included in the 2020,
2019, and 2018 balances for total compensation expense is $0.8 million, $0.7 million and $0.7 million, respectively,
relating to our ESPP.

Net Income (Loss) Per Share

Basic net income (loss) per common share is computed by dividing the net income or loss by the weighted-

average number of common shares outstanding during the period. Potentially dilutive securities were included

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in the diluted net income per common share calculation for 2019. We included 1,923,310 options to purchase shares of
common stock and 13,131 shares of RSUs in the calculation of the weighted-average common shares outstanding used in
computing diluted net income per common share. We excluded 1,022,623 shares of options and RSUs from the calculation
for 2019 because the inclusion of such shares would have had an antidilutive effect.

In 2020 and 2018, we excluded all options and awards from the calculations because we reported net losses in the

periods, and the inclusion of such shares would have had an antidilutive effect.

Year Ended December 31, 
2019
(in thousands, except share and per share data)  

2020

2018

Basic
Numerator:
Net income (loss) attributable to common stockholders for basic net
income (loss) per share
Denominator:
Weighted-average common shares outstanding
Basic net income (loss) per common share
Diluted
Numerator:
Net income (loss) attributable to common stockholders for diluted net
income (loss) per share
Denominator:
Weighted average number of common shares outstanding used in
computing basic net income (loss) per common share
Dilutive effect of employee stock options and ESPP
Weighted-average number of common shares outstanding used in
computing diluted net income (loss) per common share
Diluted net income (loss) per common share

Segment Reporting

$

$

(69,333) $

26,875

$

(70,409)

57,212,737

  56,531,439
0.48

  53,942,116
(1.31)
$

(1.21) $

$

(69,333) $

26,875

$

(70,409)

57,212,737

  56,531,439
—   1,936,441

  53,942,116
—

57,212,737

$

(1.21) $

  58,467,880
0.46

  53,942,116
(1.31)
$

The Company determines its segment reporting based upon the way the business is organized for making
operating decisions and assessing performance. The Company has only one operating segment related to the development
of pharmaceutical products.

2. Comprehensive Income (Loss)

Comprehensive income (loss) is comprised of net income (loss) and other comprehensive income (loss). For the

years ended December 31, 2020 and 2019, the only component of other comprehensive income (loss) is net unrealized
gains on marketable debt securities. There were no material reclassifications out of accumulated other comprehensive loss
during the year ended December 31, 2020.

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3. Marketable Securities

The Company’s marketable debt securities held as of December 31, 2020 and 2019 are summarized below:

(in thousands)
Money Market Funds
Corporate Securities
Government Securities

Reported as
     Cash and cash equivalents
     Marketable securities
Total investments

(in thousands)
Money Market Funds
Corporate Securities
Government Securities

Reported as
     Cash and cash equivalents
     Marketable securities
Total investments

December 31, 2020

Gross

Gross

     Amortized

     Unrealized

Unrealized     

Cost

Gains

Losses

Fair Value

$

$

158,937
119,782
315,319
594,038

$

$

— $
57
37
94

$

— $
(6)
(3)
(9) $

158,937
119,833
315,353
594,123

$

$

158,937
435,186
594,123

December 31, 2019

Gross

Gross

     Amortized

     Unrealized

Unrealized     

Cost

Gains

Losses

Fair Value

$

$

32,009
281,586
268,239
581,834

$

$

— $
195
1,006
1,201

$

— $
(30)
—
(30) $

32,009
281,751
269,245
583,005

$

$

32,009
550,996
583,005

The maturities of the Company’s marketable debt securities as of December 31, 2020 are as follows:

(in thousands)
Mature in one year or less
Mature after one year through five years

Amortized
Cost

Estimated
Fair Value

$

$

434,071
1,030
435,101

$

$

434,156
1,030
435,186

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The unrealized losses on available-for-sale investments and their related fair values as of December 31, 2020 and

2019 are as follows:

(in thousands)
Corporate Securities
Government Securities

(in thousands)
Corporate Securities

December 31, 2020

Less than 12 months

12 months or greater

Fair value

Unrealized
losses

Fair value

Unrealized
losses

$

$

15,843
40,802
56,645

$

$

(6)
(3)
(9)

$

$

— $
—
— $

—
—
—

December 31, 2019

Less than 12 months

12 months or greater

Fair value

Unrealized
losses

Fair value

Unrealized
losses

$

46,303

$

(24)

$

13,992

$

(6)

The unrealized losses from the listed securities are due to a change in the interest rate environment and not a

change in the credit quality of the securities.

For the year ended December 31, 2020, the Company received shares of Aimmune common stock and MiRagen

common stock in connection with the Aimmune and MiRagen Agreements (both as defined below). Aimmune common
stock was redeemed for cash within the same year; MiRagen common stock is classified as equity securities with a readily
determinable fair value at December 31, 2020. For the year ended December 31, 2020, the Company also received equity
of a private company in connection with a licensing agreement. The Company elects measurement alternative to carry the
investment at cost minus impairment, plus or minus changes resulting from observable price changes in orderly
transactions for the identical or a similar investment of the same issuer. There has not been any impairment or observable
price changes related to this investment. We did not hold any equity securities in our investment portfolio during the year
ended December 31, 2019.

Net gains and losses during the year ended December 31, 2020 and 2019 consist of the following:

Net gains recognized on equity securities
Less: net gains recognized on equity securities redeemed
Unrealized losses recognized on equity securities

4. Sale of Additional Common Stock

Year Ended December 31, 

2020

2019

$

$

105
801
(696)

$

$

—
—
—

In March 2018, we completed the sale of 8,395,000 shares of commons stock which included shares we issued
pursuant to our underwriters’ exercise of their over-allotment option pursuant to a follow-on financing. We received net
proceeds of $245.5 million, after underwriters’ discounts and offering expenses.

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5. Property and Equipment

Property and equipment consist of the following:

Computers, software and equipment
Furniture and fixtures
Leasehold and tenant improvements

Less accumulated depreciation and amortization

December 31, 

2020

2019

(in thousands)

$

31,229      $

527
6,957
38,713
(17,031)
21,682

$

$

21,087
492
6,831
28,410
(12,605)
15,805

Depreciation expense related to property and equipment in 2020, 2019 and 2018 was $4.7 million, $3.4 million

and $2.4 million, respectively.

6. Income Taxes

Our effective tax rate differs from the statutory federal income tax rate, primarily as a result of the changes in
valuation allowance. There was no provision for taxes for the years ended December 31, 2020 and December 31, 2018.
The provision for income taxes for the year ended December 31, 2019 was $0.3 million, which represents the current state
alternative minimum tax for the year.

A reconciliation of the federal statutory income tax to our effective income tax is as follows (in thousands):

Federal statutory income tax
State and local income taxes
Research and development credit
Stock-based compensation
State credit
Other
Net change in valuation allowance
Income tax provision (benefit)

2020

(14,559)     $
(4,659)
(9,669)
529
—
56
28,302

— $

$

$

Year Ended
December 31, 
2019

5,709      $
2,549
(6,747)
1,927
1,725
(301)
(4,550)
312

$

2018

(14,795)
(4,767)
(6,170)
444
—
414
24,874
—

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The tax effect of temporary differences that give rise to a significant portion of the deferred tax assets and

liabilities at December 31, 2020 and 2019 is presented below (in thousands):

Deferred income tax assets

Net operating loss carryforwards
Research credits
Depreciation
Unrealized loss on securities
Accrued compensation
Deferred revenue
State taxes
Gross deferred income tax assets

Valuation allowance
Net deferred income tax assets
Deferred income tax liabilities

Patent costs
Equity investment
Licensing costs
Capitalized legal costs
Unrealized gain on securities
Gross deferred income tax liabilities

Net deferred income tax asset

December 31, 

2020

2019

$

$

56,182
38,047
137
195
8,464
11,925
—
114,950
(105,995)
8,955

(4,219)
(4,497)
(194)
(21)
(24)
(8,955)

$

— $

36,891
28,415
334
—
4,788
11,215
64
81,707
(77,389)
4,318

(3,736)
—
(229)
(26)
(327)
(4,318)
—

The Tax Cuts and Jobs Act of 2017 (TCJA) was enacted in December 2017 and made substantial changes in the
U.S. tax system. One of the changes was elimination of the AMT tax system for corporations and allowance of an income
tax refund for AMT tax credit carryforwards as of December 31, 2017. We have received an income tax refund of $0.8
million and $0.8 million for each year ended December 31, 2020 and 2019 for U.S. AMT credit carryforwards. We have
net deferred tax assets relating primarily to net operating loss carryforwards and research and development tax credit
carryforwards. Due to the uncertainty surrounding the realization of the benefits of our deferred tax assets in future tax
periods, we have placed a valuation allowance against our deferred tax assets at December 31, 2020 and 2019. The
Company recognizes valuation allowances to reduce deferred tax assets to the amount that is more likely than not to be
realized. The Company’s net deferred income tax asset is not more likely than not to be realized due to the lack of
sufficient sources of future taxable income and cumulative losses that have resulted over the years. During the year ended
December 31, 2020, the valuation allowance increased by $28.6 million. The Company’s tax years starting in 2016 through
2019 remain open to potential examination by the U.S. and state taxing authorities due to carryforwards of net operating
losses.

As of December 31, 2020, we had cumulative net operating loss carryforwards for federal and state income tax

purposes of $213.6 million and $161.4 million, respectively, and available tax credit carryforwards of approximately $26.7
million for federal income tax purposes and $14.3 million for state income tax purposes, which can be carried forward to
offset future taxable income, if any. The federal net operating loss carryforwards consist of $68.0 million of losses incurred
prior to January 1, 2018, which are subject to carryforward limitations and $145.6 million of losses incurred after January
1, 2018, which may be carried forward indefinitely.

Our federal net operating loss carryforwards expire starting in 2026, state net operating loss carryforwards expire
starting in 2035, and federal tax credit carryforwards began to expire in 2019. A total of $0.03 million in federal tax credits
expired in 2019, and an additional $0.3 million will expire over the next five years if not utilized. Utilization of our net 
operating loss and tax credit carryforwards are subject to a substantial annual limitation under Section 382 of the Code due 
to the fact that we have experienced ownership changes. As a result of these changes, certain of our net operating loss and 
tax credit carryforwards may expire before we can use them.

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7. Stock-Based Compensation

Our Board of Directors and the requisite stockholders previously approved the 2010 Equity Incentive Plan (the

2010 Plan). In October 2013, our Board of Directors approved the 2013 Equity Incentive Plan (the 2013 Plan), and in
November 2013 our stockholders approved the 2013 Plan. The 2013 Plan provides for the grant of incentive stock options,
nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance
stock awards, performance cash awards, and other stock awards. The 2013 Plan became effective as of December 2, 2013,
the date of the pricing of the Company’s initial public offering. As of December 2, 2013, we suspended the 2010 Plan, and
no additional awards may be granted under the 2010 Plan. Any shares of common stock covered by awards granted under
the 2010 Plan that terminate after December 2, 2013 by expiration, forfeiture, cancellation or other means without the
issuance of such shares will be added to the 2013 Plan reserve.

As of December 31, 2020, the total number of shares of common stock available for issuance under the 2013 Plan
was 11,479,096. Unless otherwise determined by the Board, beginning January 1, 2014, and continuing until the expiration
of the 2013 Plan, the total number of shares of common stock available for issuance under the 2013 Plan will automatically
increase annually on January 1 by 4% of the total number of issued and outstanding shares of common stock as of
December 31 of the immediately preceding year. On January 1, 2020, the total number of shares of common stock
available for issuance under the 2013 Plan was increased by 1,138,046 shares, which is included in the number of shares
available for issuance above. As of December 31, 2020, a total of 10,572,839 options have been granted under the 2013
Plan.

As of December 31, 2020, the Company has awarded 453,787 RSUs to certain employees pursuant to the 2013

Plan. Vesting of these awards will be in three equal annual installments and is contingent on continued employment terms.
The fair value of these awards is determined based on the intrinsic value of the stock on the date of grant and will be
recognized as stock-based compensation expense over the requisite service period.

In November 2013, our Board of Directors and stockholders approved the 2013 Employee Stock Purchase Plan
(ESPP), which became effective as of December 5, 2013. Under the ESPP our employees may elect to have between 1-
15% of their compensation withheld to purchase shares of the Company’s common stock at a discount. The ESPP had an
initial two-year term that includes four six-month purchase periods, and employee withholding amounts may be used to
purchase Company stock during each six-month purchase period. The initial two-year term ended in December 2015 and
pursuant to the provisions of the ESPP, the second two-year term began automatically upon the end of the initial term. The
total number of shares that can be purchased with the withholding amounts are based on the lower of 85% of the
Company’s common stock price at the initial offering date or 85% of the Company’s stock price at each purchase date.

We have reserved a total of 581,286 shares of common stock for issuance under the ESPP. Unless otherwise

determined by our Board, beginning on January 1, 2014, and continuing until the expiration of the ESPP, the total number
shares of common stock available for issuance under the ESPP will automatically increase annually on January 1 by the
lesser of (i) 1% of the total number of issued and outstanding shares of common stock as of December 31 of the
immediately preceding year, or (ii) 621,814 shares of common stock. On January 1, 2014, the total number of shares of
common stock available for issuance under the ESPP was automatically increased by 313,545 shares, which is included in
the number of shares reserved for issuance above. Pursuant to approval by our board, there were no increases in the number
of authorized shares in the ESPP in years from 2015 to 2020. As of December 31, 2020, we have issued a total of 467,595
shares of common stock under the ESPP.

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Total employee, director and non-employee stock-based compensation expense recognized was as follows:

(in thousands)
General and administrative
Research and development

(in thousands)
Stock options
ESPP
RSUs

Year Ended
December 31, 
2019

2020
10,769     $
20,850
31,619

8,854     $

  22,997
$ 31,851

$

Year Ended
December 31, 
2019

2020
26,045     $ 30,502     $

     $

$

     $

804
4,770
31,619

687
662
$ 31,851

$

$

2018

7,699
12,849
20,548

2018
19,537
744
267
20,548

Information with respect to stock options outstanding is as follows:

Exercisable options
Weighted average exercise price per share of exercisable options
Weighted average grant date fair value per share of options granted during the
year
Options available for future grants
Weighted average remaining contractual life

2020

December 31, 
2019

4,668,179   3,950,965  

$

21.75 $

17.79 $

2018
3,058,659
15.12

16.96 $

$
  3,346,092   3,975,160
7.32

7.00  

20.74 $

18.06
  3,576,574
7.51

The following table summarizes stock option activity for the years ended December 31, 2020 and 2019:

Balances at December 31, 2018

Options granted
Options forfeited
Options exercised(3)

Balances at December 31, 2019

Options granted
Options forfeited
Options exercised(3)

Balances at December 31, 2020
As of December 31, 2020

Options vested and expected to vest
Exercisable

Weighted-
Average
Exercise
Price
(Per Share)(1)
19.71  
35.80
32.23
17.04
24.03  
33.08
32.93
19.36
26.23

$

Number of
Shares
5,966,928
2,142,228
(390,950)
(543,887)
7,174,319
1,679,324
(243,384)
(858,470)
7,751,789

7,751,789
4,668,179

$
$

26.23  
21.75  

     Weighted-     
Average
Remaining
Contractual
Term
(in years)
7.51

Aggregate
Intrinsic Value  
(in thousands)(2) 
$

99,273

7.32

$

79,116

7.00

7.00
5.91

$

$
$

134,941

134,941
102,120

(1) The weighted average exercise price per share is determined using exercise price per share for stock options.

(2) The aggregate intrinsic value is calculated as the difference between the exercise price of the option and the fair value of our

common stock for in-the-money options at December 31, 2020 and 2019.

(3) The total intrinsic value of stock options exercised was $16.3 million, $11.5 million and $23.6 million for the years ended

December 31, 2020, 2019 and 2018 respectively.

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The stock options outstanding and exercisable by exercise price at December 31, 2020 are as follows:

Stock Options Outstanding

Stock Options Exercisable

Range of
Exercise
Prices
$4.25 – $10.28
$10.52 – $15.78
$15.91 – $23.87
$23.96 – $35.94
$35.99 – $53.99

Weighted-
Average

     Remaining
Contractual
Term
(in years)

     Weighted-
Average
Exercise Price
Per Share

2.68
4.30
6.53
8.65
8.34
7.00

$
$
$
$
$
$

4.29  
13.10  
22.75  
31.80
37.63
26.23  

Number of
Shares

153,038  
1,639,702  
1,980,437  
2,330,771
1,647,841
7,751,789  

Number of
Shares

153,038
1,638,717
1,654,609
530,056
691,759
4,668,179

$
$
$
$
$
$

Weighted-
Average
Exercise Price
Per Share

4.29
13.10
22.67
30.12
37.51
21.75

We estimated the fair value of employee and non-employee awards using the Black-Scholes valuation model. The

fair value of employee stock options is being amortized on a straight-line basis over the requisite service period of the
awards. Management estimates the probability of non-employee awards being vested based upon an evaluation of the non-
employee achieving their specific performance goals.

Options are issued at the fair market value of our stock on the date of grant.

The fair value of employee stock options was estimated using the following weighted average assumptions for the

years ended December 31, 2020, 2019 and 2018:

Common stock fair value per share
Expected volatility
Risk-free interest rate
Expected dividend yield
Expected term (in years)

$

2020
20.69 - 45.91

Options
2019
29.96 - 44.19
 52.93% - 58.95%   60.67% - 61.33%   70.97% - 73.10%
  1.37% - 2.60%
  0.29% - 1.71%
—
—
5.23 - 6.59
5.23 - 7.65

  2.29% - 3.10%
—
5.23 - 6.08

2018
21.80 - 43.16

$

$

Expected term (years)
Expected volatility
Risk-free interest rate
Expected dividend yield

2020
0.5 - 2.0
50.77% - 66.37%
0.09% - 1.65%
—

ESPP
2019
0.5 - 2.0
50.77% - 71.37%
1.47% - 2.70%
—

2018
0.5 - 2.0
57.04% - 71.37%
1.47% - 2.70%
—

The expected term of stock options represents the average period the stock options are expected to remain
outstanding. The expected stock price volatility for our stock options for the years ended December 31, 2020 and 2019 was
determined using a blended volatility by examining the historical volatility for industry peer companies and the volatility of
our stock from the effective date that our shares were publicly traded on a national stock exchange. For the year ended
December 31, 2018, expected stock volatility was determined by examining the historical volatilities for industry peers and
adjusting for differences in our life cycle and financing leverage. Industry peers consist of several public companies in the
biopharmaceutical industry.

We determined the average expected life of stock options based on the anticipated time period between the

measurement date and the exercise date by examining the option holders’ past exercise patterns.

The risk-free interest rate assumption is based on the U.S. Treasury instruments, for which the term was consistent

with the expected term of our stock options.

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The expected dividend assumption is based on our history and expectation of dividend payouts. We have not paid

dividends and did not have any dividend payout at December 31, 2020.

The following table summarizes RSU activity for the years ended December 31, 2020:

Unvested at December 31, 2018

Granted
Vested
Forfeited

Unvested at December 31, 2019

Granted
Vested
Forfeited

Unvested at December 31, 2020

Weighted-
Average
Grant Date
Fair Value
(Per Unit)

27.64
36.68
27.64
31.12
34.66
32.51
32.61
32.33
33.04

Number of
Shares

33,933
71,566
(11,311)
(4,182)
90,006
348,288
(62,355)
(17,114)
358,825

$

$

$

As of December 31, 2020 and 2019, the unamortized compensation expense related to unvested stock options was

$48.9 million and $51.1 million, respectively. The remaining unamortized compensation expense will be recognized over
the next 2.54 years. At December 31, 2020 and 2019, the unamortized compensation expense was $0.9 million and $1.4 
million respectively under our ESPP. The remaining unamortized expense will be recognized over the next 0.94 years. At 
December 31, 2020 and 2019, the unamortized compensation expense related to unvested restricted stock units was $8.5 
million and $2.5 million, respectively. The remaining unamortized compensation expense will be recognized over the next 
2.13 years.

8. Leases

The Company leases office and laboratory space in Monrovia, CA under a lease that expired in June 2020. In
April 2020 and in September 2020, the Company entered into amendments to the lease to extend the term of the lease
under the original terms through October 2020. In November 2020, the Company entered into an amended lease for the
space, which includes a 62-month term with an option to renew for an additional five years at then market rates. In July
2017, the Company entered into an amended lease agreement for additional space in the same building with a lease that
continues through September 2022, also with an option to renew for an additional five years. The Company assesses that it
is likely to exercise both options of the lease term extensions.

The Company also leased office space in San Diego, CA through July 2020 which included an option to renew for

an additional five years. The lease expired and the Company did not exercise its option to extend the lease.

The Company leases additional office space in San Diego, CA through August 2022, with an option to extend for

an additional five years. The Company assesses that it is unlikely to exercise the option to extend the lease term.

The Company’s lease agreements do not contain any residual value guarantees or restrictive covenants. As of

December 31, 2020, the Company did not have additional operating leases that have not yet commenced.

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The following table reconciles the undiscounted cash flows for the operating leases at December 31, 2020 to the

operating lease liabilities recorded on the balance sheet (in thousands):

Years ending December 31,
2021
2022
2023
2024
2025
Thereafter
Total undiscounted lease payments
Less: Imputed interest
Present value of lease payments

Lease liabilities - short-term
Lease liabilities - long-term
Total lease liabilities

$

$

$

$

2,429
2,269
1,415
1,436
1,396
5,342
14,287
(2,659)
11,628

1,889
9,739
11,628

The following table summarizes lease costs and cash disclosures for the years ended December 31, 2020 and 2019

(in thousands):

Operating lease cost
Variable lease cost
Total lease costs

Cash paid for amounts included in

the measurement of lease liabilities

Year Ended
December 31, 

2020

2019

$

$

$

2,503
150
2,653

2,233

$

$

$

2,596
80
2,676

1,929

Rent expense for the year ended December 31, 2018 was $2.5 million.

The 2020 lease amendments to the Monrovia, CA lease are lease modifications. Non-cash activities involving

right of use assets related to the lease modification were $3.1 million.

At December 31, 2020 and 2019, the weighted-average remaining lease terms for operating leases were 7.4 years

and 5.5 years, respectively, and the weighted average discount rates for operating leases were both 5.5%.

9. Commitments and Contingencies

Contingencies

From time to time, the Company may be subject to various litigation and related matters arising in the ordinary
course of business. The Company does not believe it is currently subject to any material matters where there is at least a
reasonable possibility that a material loss may be incurred.

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We are obligated to make future payments to third parties under in-license agreements, including sublicense fees,

royalties, and payments that become due and payable on the achievement of certain development and commercialization
milestones. As the amount and timing of sublicense fees and the achievement and timing of these milestones are not
probable and estimable, such commitments have not been included on our balance sheet. We have also entered into
agreements with third party vendors which will require us to make future payments upon the delivery of goods and services
in future periods.

Guarantees

In the normal course of business, we indemnify certain employees and other parties, such as collaboration partners

and other parties that perform certain work on behalf of, or for the Company or take licenses to our technologies. We have
agreed to hold these parties harmless against losses arising from our breach of representations or covenants, intellectual
property infringement or other claims made against these parties in performance of their work with us.

These agreements typically limit the time within which the party may seek indemnification by us and the amount

of the claim. It is not possible to prospectively determine the maximum potential amount of liability under these
indemnification agreements since we have not had any prior indemnification claims on which to base the calculation.
Further, each potential claim would be based on the unique facts and circumstances of the claim and the particular
provisions of each agreement. We are not aware of any potential claims and we did not record a liability as of
December 31, 2020 and 2019.

10. Collaboration and Licensing Agreements

Following is a summary description of the material revenue arrangements, including arrangements that generated

revenue in the period ended December 31, 2020, 2019, and 2018. The revenue reported for each agreement has been
adjusted to reflect the adoption of ASC 606 for each period presented.

Janssen Biotech, Inc.

In November 2020, the Company entered into a Collaboration and License Agreement (the Janssen Agreement)

with Janssen Biotech, Inc. (Janssen) pursuant to which Xencor and Janssen will conduct research and development
activities to discover novel CD28 bispecific antibodies for the treatment of prostate cancer. Janssen and Xencor will
conduct joint research activities for up to a three-year period to discover XmAb bispecific antibodies against CD28 and
against an undisclosed prostate tumor-target with Janssen maintaining exclusive worldwide rights to develop and
commercialize Licensed Products identified from the research activities.

Under the Janssen Agreement, the Company will conduct research activities and apply its bispecific Fc
technology to antibodies targeting prostate cancer provided by Janssen. Upon completion of the research activities Janssen
will have a candidate selection option to advance an identified candidate for development and commercialization. The
activities will be conducted under a research plan agreed to by both parties. Janssen will assume full responsibility for
development and commercialization of the CD28 bispecific antibody candidate. Pursuant to the Janssen Agreement, the
Company received an upfront payment of $50.0 million and is eligible to receive up to $662.5 million in milestones which
include $161.9 million in development milestones, $240.6 million in regulatory milestones and $260.0 million in sales
milestones. If commercialized, the Company is eligible to receive royalties on net sales that range from the high-single to
low-double digit percentages.

Pursuant to the Janssen Agreement, upon development of a bispecific candidate by Janssen through proof of

concept, we have the right to opt-in to fund 20% of development costs and to perform 30% of detailing efforts in the U.S.
If we exercise this right, we will be eligible to receive tiered royalties in the low-double digit to mid-teen percentage range.

We evaluated the Janssen Agreement under ASC 606 and identified the performance obligation under the

Agreement to be delivery of CD28 bispecific antibodies to Janssen from the research activities outlined in the research

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plan. The Company determined that the license to the bispecific antibodies is not a separate performance obligation
because it is not capable of being distinct, the license to the antibodies cannot be separated from the underlying antibodies.

Janssen will benefit from delivery of the bispecific antibodies upon completion of the research activities.

The Company determined that the transaction price of the Janssen Agreement at inception was $50.0 million

consisting of the upfront payment. The potential milestones are not included in the transaction price as these are contingent
on future events and the Company would not recognize these in revenue until it is not probable that these would not result
in significant reversal of revenue amounts in future periods. The candidate selection option payment is substantive and is a
separate performance obligation. The Company will re-assess the transaction price at each reporting period and when event
outcomes are resolved or changes in circumstances occur.

The Company allocated the transaction price to the single performance obligation, delivery of CD28 bispecific

antibodies to Janssen.

The Company will recognize the $50.0 million transaction price as it satisfies its performance obligation to deliver
CD28 bispecific antibodies to Janssen. The Company will recognize revenue related to the performance obligation over the
expected period of time to complete and deliver the CD28 bispecific antibodies to Janssen using the expected input method
which considers an estimate of the Company’s efforts to complete the research activities outlined in the Janssen
Agreement.

No revenue was recognized under this arrangement for the year ended December 31, 2020, and there is $50.0

million in deferred revenue as of December 31, 2020 related to our obligation to complete research activities and deliver
CD28 bispecific antibodies under the Janssen Agreement.

Aimmune Therapeutics, Inc.

On February 4, 2020, the Company entered into a License, Development and Commercialization Agreement (the

Aimmune Agreement) with Aimmune Therapeutics, Inc. (Aimmune) pursuant to which the Company granted Aimmune an
exclusive worldwide license to XmAb7195, which was renamed AIMab7195. Under the Aimmune Agreement, Aimmune
will be responsible for all further development and commercialization activities for XmAb7195. The Company received an
upfront payment of $5.0 million and 156,238 shares of Aimmune common stock with an aggregate value of $4.6 million on
the closing date. Under the Aimmune Agreement, the Company is also eligible to receive up to $385.0 million in
milestones, which include $22.0 million in development milestones, $53.0 million in regulatory milestones and $310.0
million in sales milestones, and tiered royalties on net sales of approved products from high-single to mid-teen percentage
range.

Under the Aimmune Agreement, Aimmune received exclusive worldwide rights to manufacture, develop and
commercialize XmAb7195. They also received the rights to all data, information and research materials related to the
XmAb7195 program.

The Company evaluated the Aimmune Agreement under the revenue recognition standard ASC 606 and identified

the following performance obligations that it deemed to be distinct at the inception of the contract:

● license to the rights to the XmAb7195 drug candidate; and
● rights to material, data, and information that the Company had accumulated in connection with

manufacturing, testing, and conducting clinical trials for the XmAb7195 program and intellectual property
filings and information (XmAb7195 data).

The Company considered the licenses as functional intellectual property as Aimmune has the right to use
XmAb7195 at the time that the Company transfers such rights. The rights to the XmAb7195 data are not considered to be
separate from the license to XmAb7195 as Aimmune cannot benefit from the license without the supporting data and
documentation.

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The Company determined the transaction price at inception is $9.6 million which consists of the $5.0 million

upfront payment and the 156,238 shares of Aimmune common stock which had a value of $4.6 million on the closing date.
The Company determined that the transaction price is to be allocated to the performance obligations. The Aimmune
Agreement includes variable consideration for potential future milestones and royalties that are contingent on future
success factors for the XmAb7195 program. The Company used the “most likely amount” method to determine the
variable consideration. None of the development, regulatory or sales milestones or royalties were included in the
transaction price. The Company will re-evaluate the transaction price in each reporting period as uncertain events are
resolved or other changes in circumstances occur.

The Company determined the transaction price at inception of the Aimmune Agreement and allocated it to the

performance obligation, delivery of the XmAb7195 license.

The Company completed delivery of its performance obligations in March 2020. The license to XmAb7195 was

transferred to Aimmune at inception of the Aimmune Agreement, and the XmAb7195 data were transferred to Aimmune in
March 2020.

The Company recognized $9.6 million of revenue related to the agreement for the year ended December 31, 2020.

There is no deferred revenue as of December 31, 2020 related to this agreement.

Genentech

In February 2019, the Company entered into a collaboration and license agreement (the Genentech Agreement)

with Genentech, Inc. and F. Hoffman-La Roche Ltd (collectively, Genentech) for the development and commercialization
of novel IL-15 collaboration products (Collaboration Products), including XmAb306, the Company’s IL-15/IL15Rα-Fc
candidate.

Under the terms of the Genentech Agreement, Genentech received an exclusive worldwide license to XmAb306

and other Collaboration Products, including any new IL-15 programs identified during the joint research collaboration.
Genentech and Xencor will jointly collaborate on worldwide development of XmAb306 and potentially other
Collaboration Products.

The Company received a $120.0 million upfront payment and is eligible to receive up to an aggregate of $160.0

million in clinical milestone payments for XmAb306 and up to $180.0 million in clinical milestone payments for each new
Collaboration Product. The Company is also eligible to receive 45% share of net profits for sales of XmAb306 and other
Collaboration Products, while also sharing in net losses at the same percentage rate. The parties will jointly share in
development and commercialization costs for all programs designated as a development program under the Genentech
Agreement at the same percentage rate, while Genentech will bear launch costs entirely. The initial 45% profit-cost share
percentage is subject to a one-time downward adjustment at the Company’s discretion and convertible to a royalty under
certain circumstances.

Pursuant to the Genentech Agreement, XmAb306 is designated as a development program and all costs incurred

for developing both XmAb306 is being shared with Genentech under the initial cost-sharing percentage.

Under the Genentech Agreement, the Company and Genentech will conduct joint research activities for a two-
year period to identify and discover additional IL-15 candidates developed from the Company’s cytokine and bispecific
technologies. The two-year research term may be extended an additional year if both parties agree. The Company and
Genentech are each responsible for their own costs in conducting the research activities. The Company is eligible for
clinical milestone payments for new Collaboration Products identified from the research efforts.

The Company evaluated the Genentech Agreement under the provisions of ASU No. 2014-09, Revenue from

Contracts with Customers and all related amendments (collectively, ASC 606) as well as ASC 808, Collaborative
Arrangements. Certain provisions of the Genentech Agreement including the cost-sharing of development programs are
governed by ASC 808. We have determined that Genentech is a customer for purposes of the delivery of specific
performance obligations under the Genentech Agreement and applied the provisions of ASC 606 to the transaction.

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The Company identified the following performance obligations under the Genentech Agreement: (i) the license of
XmAb306 and (ii) research services during a two-year period to identify up to potentially nine additional IL-15 candidates,
each a separate research program and a separate performance obligation. The Company determined that the license and
each of the potential research programs are separate performance obligations because they are capable of being distinct and
are distinct in the context of the Genentech Agreement. The license to XmAb306 has standalone functionality as
Genentech has exclusive worldwide rights to the program, including the right to sublicense to third parties. Upon the
transfer of the license of XmAb306, Genentech could develop and commercialize XmAb306 without further assistance
from the Company. The Company determined that the research services for each potential additional IL-15 candidate and
research program were separate standalone performance obligations. The Genentech Agreement provides an outline of an
integrated research plan for the programs to be conducted by the two companies, and the research activities are separate
and distinct from the license to XmAb306. In October 2020, an additional program was declared a Collaboration Program
under the Agreement, and the Company completed its performance obligation for that specific research program as the
program and licensed rights were transferred to Genentech.

The Company determined the standalone selling price of the license to be $114.4 million using the adjusted

market assessment approach considering similar collaboration and license agreements and transactions. The standalone
selling price for the research activities for all nine of the potential IL-15 programs to be performed during the research term
was determined to be $8.5 million using the expected cost approach which was derived from the Company’s experience
and information from providing similar research activities to other parties.

The Company determined that the transaction price of the Genentech Agreement at inception was $120.0 million
consisting of the upfront payment. The potential milestones are not included in the transaction price as these are contingent
on future events and the Company would not recognize these in revenue until it is not probable that these would not result
in significant reversal of revenue amounts in future periods. The Company will re-assess the transaction price at each
reporting period and when event outcomes are resolved or changes in circumstances occur.

The Company allocated the transaction price to each of the separate performance obligations using the relative

standalone selling price with $111.7 million allocated to the license to XmAb306, $4.1 million allocated to the additional
program and $4.2 million allocated to the research services.

The Company recognized the $111.7 million allocated to the license when it satisfied its performance obligation

and transferred the license to Genentech in March 2019. The license was transferred upon the effective date of the
Genentech Agreement, and the $8.3 million allocated to the research activities is being recognized over a period of time
through the end of the research term or the time that a program is delivered to Genentech. A total of $3.5 million and $2.2
million of revenue related to the research activities was recognized for the years ended December 31, 2020 and December
31, 2019, respectively.

For the years ended December 31, 2020 and December 31, 2019, we recognized $3.5 million and $113.9 million
of income, respectively from the Genentech Agreement. As of December 31, 2020, there is a $3.2 million payable related
to cost-sharing development activities during the fourth quarter of 2020. There is $2.5 million in deferred revenue as of
December 31, 2020 which reflects our obligation to perform research services during the remaining research term.

Astellas

Effective March 29, 2019, the Company entered into a Research and License Agreement (Astellas Agreement)

with Astellas Pharma Inc. (Astellas) pursuant to which the Company and Astellas will conduct a discovery program to
characterize compounds and products for development and commercialization. Under the Astellas Agreement, Astellas was
granted a worldwide exclusive license, with the right to sublicense products in the field created by the research activities.

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Pursuant to the Astellas Agreement, the Company applied its bispecific Fc technology to research antibodies

provided by Astellas to generate bispecific antibody candidates and returned the candidates to Astellas for further
development and commercialization. The activities were conducted under a research plan agreed to by both parties to the
Astellas Agreement. Astellas will assume full responsibility for development and commercialization of the antibody
candidate. Pursuant to the Astellas Agreement, the Company received an upfront payment of $15.0 million and is eligible
to receive up to $240.0 million in milestones, which include $32.5 million in development milestones, $57.5 million in
regulatory milestones and $150.0 million in sales milestones. If commercialized, the Company is eligible to receive
royalties on net sales that range from the high-single to low-double digit percentages.

We evaluated the Astellas Agreement under ASC 606 and identified the performance obligations under the

Agreement to be (i) delivery of bispecific antibodies to Astellas from the antigen provided by Astellas and (ii) research
activities against the bispecific antibodies as outlined in the research plan.

The Company determined the standalone selling price of the bispecific deliverable to be $17.1 million and the

standalone selling price for the research activities to be performed was determined to be $1.4 million.

The Company determined that the transaction price of the Astellas Agreement is $17.5 million consisting of the

upfront payment and an initial milestone of $2.5 million for Astellas initiating an IND enabling study. The additional
milestones are not included in the transaction price as these are contingent on future events, and the Company would not
recognize these in revenue until it is not probable that these would not result in significant reversal of revenue amounts in
future periods. The Company will re-assess the transaction price at each reporting period and when event outcomes are
resolved or changes in circumstances occur.

The Company allocated the transaction price to each of the separate performance obligations using the relative

standalone selling price with $16.1 million allocated to delivery of the bispecific antibodies and the remainder of $1.4
million was allocated to the research activities.

The Company recognized the $13.6 million allocated to the bispecific antibodies when it satisfied its performance

obligation to Astellas in 2019 and recognized $2.5 million related to the milestone in 2020. The $1.4 million allocated to
the research activities was recognized as the research services were completed.

We recognized $3.5 million and $14.0 million of revenue under this arrangement for the years ended December

31, 2020 and December 31, 2019, respectively. There is a $2.5 million contract asset recorded at December 31, 2020
related to a milestone. There is zero and $1.0 million in deferred revenue as of December 31, 2020 and December 31, 2019,
respectively.

Novartis

In June 2016, the Company entered into a Collaboration and License Agreement (Novartis Agreement) with

Novartis Institutes for BioMedical Research, Inc. (Novartis), to develop and commercialize bispecific and other Fc
engineered antibody drug candidates using the Company’s proprietary XmAb technologies and drug candidates. Pursuant
to the Novartis Agreement:

● The Company granted Novartis certain exclusive rights to research, develop and commercialize XmAb14045

(vibecotamab) and XmAb13676 (plamotamab), two development stage products that incorporate the
Company’s bispecific Fc technology;

● The Company will apply its bispecific technology in up to four target pair antibodies identified by Novartis

(each a Global Discovery Program); and

● The Company will provide Novartis with a non-exclusive license to certain of its Fc technologies to apply

against up to ten targets identified by Novartis.

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In December 2018, Novartis notified the Company it was terminating its rights with respect to the plamotamab
program, which became effective June 2019. Under the Novartis Agreement, Novartis is responsible to fund its share of
plamotamab development costs through June 2020. In November 2019, the Company and Novartis amended the
Agreement, and Novartis paid the Company $1.4 million in settlement of its projected remaining cost-sharing due for the
plamotamab program.

We completed delivery of a Global Discovery Program in 2017 and delivery of a second Global Discovery

Program in 2018. In December 2019, Novartis dosed a patient in a Phase 1 study with an undisclosed bispecific antibody
that is a Global Discovery Program, and we received a $10.0 million milestone payment.

Novartis will assume full responsibility for development and commercialization of each product candidate under

each of the Global Discovery Programs.

Under ASC 606, revenue is recognized at the time that the Company’s performance obligation for each Global

Discovery is completed upon delivery of each discovery program to Novartis. The Company delivered a discovery
program to Novartis in 2017 and recognized $20.1 million of revenue in the period of delivery. In the third quarter of 2018,
the Company delivered a second discovery program to Novartis and recognized an additional $20.0 million of revenue. In
the third quarter of 2019, Novartis received notice of approval for an investigational new study (IND) from the Food and
Drug Administration (FDA) for an application submitted for a Global Discovery Program, and we recognized $10.0
million of revenue.

During the year ended December 31, 2019 and 2018, the Company recognized $10.0 million and $20.0 million of
revenue respectively. No revenue was recognized during the year ended December 31, 2020. There is a receivable of $0.9
million and $12.2 million as of December 31, 2020 and December 31, 2019, respectively, related to the arrangement, and
we have recorded $40.1 million in deferred revenue as of December 31, 2020 related to the arrangement.

Amgen Inc.

In September 2015, the Company entered into a research and license agreement (the Amgen Agreement) with

Amgen Inc. (Amgen) to develop and commercialize bispecific antibody product candidates using the Company’s
proprietary XmAb® bispecific Fc technology. Under the Amgen Agreement, the Company granted an exclusive license to
Amgen to develop and commercialize bispecific drug candidates from the Company’s preclinical CD38 Program. The
Company also agreed to apply its bispecific technology to five previously identified Amgen provided targets (each a
Discovery Program). The Company received a $45.0 million upfront payment and milestones totaling $15.5 million from
Amgen and is eligible to receive up to $255.0 million in future development, regulatory and sales milestones in total for
programs in development and is eligible to receive royalties on any global net sales of products.

Amgen will assume full responsibility for development and commercialization of product candidates under each

of the Discovery Programs.

The Company evaluated the Amgen Agreement under ASC 606 and determined that it is a customer and that

delivery of the CD38 Program and each of the five Discovery Programs represent the performance obligations under the
contract.

The Company determined the transaction price at inception is the $45.0 million upfront payment to be allocated to

the performance obligations. The Amgen Agreement includes variable consideration for potential future milestones and
royalties that were contingent on future success factors for development programs. The Company used the “most likely”
method to determine the variable consideration. In 2019, the Company recognized a $5.0 million milestone related to one
of the Discovery Programs. No other development, regulatory or sales milestones or royalties were included in the
transaction price. The Company will re-evaluate the transaction price in each reporting period and as uncertain events are
resolved or other changes in circumstances occur.

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The Company completed performance obligations under the Amgen Agreement. In the third quarter of 2019, a

$5.0 million milestone was recognized in connection with a development milestone for a Discovery Program.

During the years ended December 31, 2019 and 2018, the Company recognized $5.0 million and $0.6 million in
revenue, respectively, under this arrangement. No revenue was recognized for the year ended December 31, 2020. As of
December 31, 2020, there was no deferred revenue related to the arrangement.

MorphoSys AG

In June 2010, the Company entered into a Collaboration and License Agreement with MorphoSys AG
(MorphoSys), which was subsequently amended in March 2012 and in 2020. The agreement provides MorphoSys with an
exclusive worldwide license to the Company’s patents and know-how to research, develop, and commercialize the
Company’s XmAb5574 product candidate (subsequently renamed MOR208 and tafasitamab) with the right to sublicense
under certain conditions. If certain developmental, regulatory, and sales milestones are achieved, the Company is eligible to
receive future milestone payments and royalties.

The Company recognized a total of $37.5 million of milestone revenue related to regulatory submission and

approval of MorphoSys’ tafasitamab in the U.S., now Monjuvi, and royalties of $1.5 million on net sales of Monjuvi for
the year ended December 31, 2020. There were no revenues recognized under this arrangement for the years ended
December 31, 2019 and 2018. As of December 31, 2020, the Company has no deferred revenue related to this agreement
and has recorded a receivable of $1.2 million for royalties due.

Alexion Pharmaceuticals, Inc.

In January 2013, the Company entered into an option and license agreement with Alexion Pharmaceuticals, Inc.
(Alexion). Under the terms of the agreement, the Company granted to Alexion an exclusive research license, with limited
sublicensing rights, to make and use our Xtend technology. Alexion exercised its rights to include our technology in
ALXN1210, which is now marketed as Ultomiris.

The Company is eligible to receive contractual milestones for certain development, regulatory and commercial

achievements, and the Company is also entitled to receive royalties based on a percentage of net sales of such products sold
by Alexion, its affiliates or its sub licensees, which percentage is in the low single digits. Alexion’s royalty obligations
continue on a product-by-product and country-by-country basis until the expiration of the last-to-expire valid claim in a
licensed patent covering the applicable product in such country.

In 2018, Alexion completed certain regulatory submissions and regulatory approvals for Ultomiris, and the

Company received $20.0 million in milestone payments.

In 2019, Alexion completed certain regulatory submissions for Ultomiris, and the Company received a total of

$8.0 million in milestone payments. During 2019, the Company also recorded royalty revenue of $5.0 million in
connection with reported net sales of Ultomiris by Alexion.

In 2020, the Company received $10.0 million for the achievement of certain sales milestones of Ultomiris in 2020

and also recorded royalty revenue of $16.2 million on net sales.

The total revenue recognized under this arrangement was $26.2 million, $13.0 million, and $20.0 million for the

years ended December 31, 2020, 2019, and 2018, respectively. As of December 31, 2020, there is a receivable of $8.8
million, and there is no deferred revenue related to this agreement.

Gilead Sciences, Inc.

In January 2020, the Company entered into a Technology License Agreement (the Gilead Agreement) with Gilead

Sciences, Inc. (Gilead), in which the Company provided Gilead an exclusive license to its Cytotoxic Fc and Xtend Fc
technologies for an initial identified antibody and options for up to three additional antibodies directed to the

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same molecular target. Gilead is responsible for all development and commercialization activities for all target candidates. 
The Company received an upfront payment of $6.0 million and is eligible to receive up to $67.0 million in milestones, 
which include $10.0 million in development milestones, $27.0 million in regulatory milestones and $30.0 million in sales 
milestones for each product incorporating the antibodies selected. In addition, the Company is eligible to receive royalties 
in the low-single digit percentage range on net sales of approved products. 

In the second quarter of 2020, Gilead exercised options on three additional antibody compounds, and in April

2020, we received a total of $7.5 million in payment of the three options.

The Company evaluated the Gilead Agreement under the revenue recognition standard ASC 606 and identified the

following performance obligations that it deemed to be distinct at the inception of the contract:

● non-exclusive license to its Cytotoxic Fc and Xtend Fc technologies; and
● options for four exclusive commercial licenses to incorporate the licensed technologies on approved target

compounds.

The Company considered the licenses as functional intellectual property as Gilead has the right to use the

technologies at the time that the Company transfers such rights. Each of the four options is considered a separate
performance obligation as the arrangement does not confer material rights to the options without payment of the option
exercise fee. Gilead will benefit from each option upon exercise of each of the four options and payment of each option fee
as Gilead has access to each technology at inception of the arrangement and the rights are transferred upon payment of
each option fee.

The total transaction price is $13.5 million which includes the upfront payment of $6.0 million and the option fee

payment of $7.5 million which was contractually due with the exercise of the three options by Gilead. The milestone
payments are variable consideration to which the Company applied the “most likely amount” method and concluded at
inception of the Gilead Agreement it is unlikely that the Company will collect such payments. The milestone payments
were not included in the transaction price, and the Company will review this conclusion and update at each reporting
period.

The Company allocated $3.5 million of the transaction price to the licenses to the cytotoxic Fc and Xtend Fc

technologies and recognized income for the licenses at inception of the arrangement when Gilead began benefiting access
to them. The Company allocated $2.5 million to the initial option exercise which was effective at inception of the
arrangement and payment of the upfront amount, and the Company allocated $7.5 million to the three remaining options
which became effective in April 2020 when Gilead paid the option fees.

The Company recognized $13.5 million of revenue related to the Gilead Agreement for the year ended December

31, 2020. There is no deferred revenue as of December 31, 2020 related to this agreement.

Omeros Corporation

In August 2020, the Company entered into a Technology License Agreement (the Omeros Agreement) with

Omeros Corporation (Omeros), in which the Company provided Omeros a non-exclusive license to its Xtend Fc
technology, an exclusive license to apply its Xtend technology to an initial identified antibody and options to apply its
Xtend technology to three additional antibodies. Omeros is responsible for all development and commercialization
activities for all target candidates. The Company received an upfront payment of $5.0 million and is eligible to receive up
to $65.0 million in milestones, which include $15.0 million in development milestones, $25.0 million in regulatory
milestones and $25.0 million in sales milestones for each product incorporating the antibodies selected. In addition, the
Company is eligible to receive royalties in the mid-single digit percentage range on net sales of approved products.

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The Company evaluated the Omeros Agreement under the revenue recognition standard ASC 606 and identified

the following performance obligations that it deemed to be distinct at the inception of the contract:

● non-exclusive license to its Xtend Fc technologies; and
● options for four exclusive commercial licenses to incorporate the licensed technologies on approved target

compounds.

The Company considered the license as functional intellectual property as Omeros has the right to use the

technology at the time that the Company transfers such rights. Each of the four options is considered a separate
performance obligation as the arrangement does not confer material rights to the options without payment of the option
exercise fee. Omeros will benefit from each option upon exercise of each of the four options and payment of each option
fee as Omeros has access to each technology at inception of the arrangement and the rights are transferred upon payment of
each option fee.

The total transaction price is $5.0 million, which includes the upfront payment. The milestone payments are

variable consideration to which the Company applied the “most likely amount” method and concluded at inception of the
Omeros Agreement it is unlikely that the Company will collect such payments. The milestone payments were not included
in the transaction price and the Company will review this conclusion and update at each reporting period.

The Company allocated $2.0 million of the transaction price to the licenses to the Xtend Fc technology and
recognized income for the licenses at inception of the arrangement when Omeros began benefiting access to it. The
Company allocated $3.0 million to the initial option exercise which was effective at inception of the arrangement.

 The Company recognized $5.0 million of revenue related to the Omeros Agreement for the year ended December 

31, 2020. There is no deferred revenue as of December 31, 2020 related to this agreement.

MiRagen Therapeutics, Inc./Viridian Therapeutics, Inc.

In December 2020, we entered into a Technology License Agreement (MiRagen Agreement) with MiRagen

Therapeutics, Inc. (MiRagen), in which we provided MiRagen a non-exclusive license to our Xtend Fc technology and an
exclusive license to apply our Xtend Fc technology to antibodies targeting IGF-1R. MiRagen subsequently changed its
name to Viridian Therapeutics, Inc. Viridian is responsible for all development and commercialization activities. We
received an upfront payment of 322,407 shares of Viridian common stock valued at $6.0 million and are eligible to receive
up to $55.0 million in milestones, which include $10.0 million in development milestones, $20.0 million in regulatory
milestones and $25.0 million in sales milestones. We are also eligible to receive royalties in the mid-single digit percentage
range on net sales of approved products.

The Company evaluated the MiRagen Agreement under the revenue recognition standard ASC 606 and identified

the following performance obligation that it deemed to be distinct at the inception of the contract:

● non-exclusive license to its Xtend Fc technologies

The Company considered the license as functional intellectual property as MiRagen has the right to use the

technology at the time that the Company transfers such rights.

The total transaction price is $6.0 million, which includes the upfront payment of 322,407 MiRagen shares at their

fair value at the date of the Agreement. The milestone payments are variable consideration to which the Company applied
the “most likely amount” method and concluded at inception of the MiRagen Agreement it is unlikely that the Company
will collect such payments. The milestone payments were not included in the transaction price, and the Company will
review this conclusion and update at each reporting period.

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The Company allocated $6.0 million of the transaction price to the licenses to the Xtend Fc technology and
recognized income for the licenses at inception of the arrangement when MiRagen began benefiting access to it. The
Company recognized $6.0 million of revenue related to the MiRagen Agreement for the year ended December 31, 2020.
There is no deferred revenue as of December 31, 2020 related to this agreement.

Private Biotech Company License Agreement

In November 2020, the Company entered into a License Agreement with a newly formed, privately held

biotechnology company (Private BioCo) pursuant to which the Company granted Private BioCo exclusive worldwide
rights to develop and commercialize to three preclinical-stage Fc-engineered drug candidates: XmAb6755, XPro9523 and
XmAb10717. Under the Agreement, Private BioCo will be responsible for all further development and commercialization
activities for XmAb6755, XPro9523 and XmAb10717. The Company received a 15% equity interest in Private BioCo with
a fair value of $16.1 million, and the Company is eligible to receive royalties on net sales of approved products in the mid-
single digit to mid-teen percentage range.

Under the License Agreement, Private BioCo received exclusive worldwide rights to manufacture, develop and

commercialize XmAb6755, XPro9523 and XmAb10717. They also received the rights to all data, information and research
materials related to the three preclinical stage programs.

The Company evaluated the License Agreement under the revenue recognition standard ASC 606 and identified

the following performance obligations that it deemed to be distinct at the inception of the contract:

● exclusive license to the XmAb6755, XPro9523 and XmAb10717 drug candidates; and
● rights to material, data, and information that the Company had accumulated in connection with conducting
preclinical activities for each of the three programs and intellectual property filings and information.

The Company considered the licenses as functional intellectual property as Private BioCo has the right to use each
of XmAb6755, XPro9523 and XmAb10717 at the time that the Company transfers such rights. The rights to the preclinical
programs’ data are not considered to be separate from the license to programs as Private BioCo cannot benefit from the
license without the supporting data and documentation.

The total transaction price is $16.1 million, which includes the upfront payment of 15% of the equity of Private
BioCo at its fair value at the date of the Agreement. The License Agreement includes variable consideration for potential
future royalties that were contingent on future success factors for the licensed programs. The Company used the “most
likely amount” method to determine the variable consideration. None of the royalties were included in the transaction
price. The Company will re-evaluate the transaction price in each reporting period as uncertain events are resolved or other
changes in circumstances occur.

The Company determined the transaction price at inception of the License Agreement and allocated it to the

performance obligation, delivery of the XmAb6755, XPro9523 and XmAb10717 licenses.

The Company completed delivery of its performance obligations in December 2020. The licenses to XmAb6755,
XPro9523, and XmAb10717 were transferred to Private BioCo at inception of the Agreement, and the related research data
and documentation was transferred to Private BioCo in December 2020.

The Company recognized $16.1 million of revenue related to the agreement for the year ended December 31,

2020. There is no deferred revenue as of December 31, 2020 related to this agreement.

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INmune Bio, Inc.

In October 2017, the Company entered into a License Agreement with INmune Bio, Inc. (INmune). Under the

terms of the agreement, the Company provided INmune with an exclusive license to certain rights to a proprietary protein,
XPro1595. Under the agreement the Company received an upfront payment of $100,000, 1,585,000 shares of INmune
common stock and an option to purchase an additional 10% interest of the fully diluted shares of INmune for $10.0 million.
The Company is eligible to receive a percentage of sublicensing revenue received for XPro1595 and also royalties in the
mid-single digit percent range on the sale of approved products.

In 2018, INmune filed a registration statement on a Form S-1 with the Securities and Exchange Commission

(SEC) which was declared effective by the SEC on December 19, 2018.

Under ASC 606, the Company determined that the performance obligation under the agreement was the license to

XPro1595, and performance occurred at the effective date of the agreement. The total consideration under the agreement
was determined to be $100,000 as the equity interest, and the option at inception of the Agreement had an insignificant fair
value. The Company recognized $100,000 as revenue related to the agreement for the year ended December 31, 2017 and
did not recognize any revenue related to the agreement for the years ended December 31, 2020, 2019, or 2018. There is no
deferred revenue as of December 31, 2020 related to this agreement. The INmune shares are recorded at cost on the
Company’s balance sheet as of December 31, 2020.

Vir Biotechnology, Inc.

In 2019, the Company entered into a Patent License Agreement (the Vir Agreement) with Vir Biotechnology (Vir)

pursuant to which the Company provided a non-exclusive license to its Xtend technology for up to two targets. Under the
terms of the Vir Agreement, the Company received an upfront payment and is eligible to receive total milestones of $155.0
million which include $5.0 million of development milestones, $30.0 million of regulatory milestones and $120.0 million
of sales milestones. In addition, the Company is eligible to receive royalties on the net sales of approved products in the
low-single digits.

The Company evaluated the Vir Agreement and determined that the single performance obligation was access to a

non-exclusive license to certain patents of the Company which were transferred to Vir upon execution of the Vir
Agreement in July 2019.

Vir initiated a Phase 1 study with a licensed antibody in 2019, and in the second quarter of 2020, it initiated a

Phase 1 study with a second licensed antibody.

In March 2020, the Company entered into a second Patent License Agreement (the Second Vir Agreement) with

Vir pursuant to which the Company provided a non-exclusive license to its Xtend technology to extend the half-life of
novel antibodies Vir is investigating as potential treatments for patients with COVID-19. Under the terms of the Second Vir
Agreement, Vir is responsible for all research, development, regulatory and commercial activities for the antibody, and the
Company is eligible to receive royalties on the net sales of approved products in the mid-single digit percentage range.

Vir initiated a Phase 3 study with a licensed antibody to treat patients with COVID-19 in 2020.

The Company determined that the Second Vir Agreement was a modification of the original agreement, and the
transfer of the license occurred at inception of the Vir Agreement. The total consideration under the arrangement did not
change with the Second Vir Agreement as the Company will potentially receive additional royalty revenue which is
variable consideration and is not included in the transaction price.

The Company recognized $0.3 million and $0.8 million of license and milestone revenue related to the agreement

for the years ended December 31, 2020 and 2019, respectively. There is no deferred revenue as of December 31, 2020
related to this agreement.

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Revenue Earned

The $122.7 million, $156.7 million, and $40.6 million of revenue recorded for the years ended December 31,

2020, 2019 and 2018, respectively, were earned principally from the following licensees (in millions):

Aimmune
Amgen
Alexion
Astellas
Genentech
Gilead
MiRagen/Viridian
MorphoSys
Novartis
Omeros
Vir
Private BioCo
Total

Year Ended
December 31, 
2019

2018

2020

$

$

9.6     
—
26.2
3.5
3.5
13.5
6.0
39.0
—
5.0
0.3
16.1
122.7

$

$

—     
5.0
13.0
14.0
113.9
—
—
—
10.0
—
0.8
—
156.7

$

$

—
0.6
20.0
—
—
—
—
—
20.0
—
—
—
40.6

The table below summarizes the disaggregation of revenue recorded for the years ended December 31, 2020, 2019

and 2018 (in millions):

Research collaboration
Milestone
Licensing
Royalties
Total

2020

4.5     
50.2
50.2
17.8
122.7

$

$

$

$

Year Ended
December 31, 
2019

16.3     
23.2
112.2
5.0
156.7

$

$

2018

20.1
20.5
—
—
40.6

A portion of our revenue is earned from collaboration partners outside the United States. Non-U.S. revenue is

denominated in U.S. dollars. A breakdown of our revenue from U.S. and non-U.S. sources for the years ended
December 31, 2020, 2019 and 2018 is as follows (in millions):

U.S. Revenue
Non-U.S. Revenue
Total

Year Ended
December 31, 
2019

2020

$

$

64.1     
58.6
122.7

$

$

142.7     
14.0
156.7

$

$

2018

40.6
—
40.6

Remaining Performance Obligations and Deferred Revenue

Our remaining performance obligations are delivery of two additional Global Discovery Programs under the

Novartis Agreement and conducting research activities pursuant to research plans under the Genentech and Janssen
Agreements. As of December 31, 2020 and 2019, we have deferred revenue of $92.6 million and $47.1 million,
respectively. All of the deferred revenue was classified as short term as of December 31, 2020 as our obligations to perform
research services are due on demand when requested by Novartis, Genentech and Janssen under the respective Agreements.
As of December 31, 2019, $45.2 million of deferred revenue was classified as current liabilities as our

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obligations to perform services are due on demand when requested by Novartis and Astellas under the Novartis and 
Astellas Agreements, respectively. A total of $1.9 million of deferred liability is classified as long-term for the obligation 
to perform research services to Genentech under the Genentech Agreement after one year.

11. 401(k) Plan

We have a 401(k)-plan covering all full-time employees. Employees may make pre-tax contributions up to the

maximum allowable by the Internal Revenue Code. Effective January 1, 2018, the Company contributes 100% of the first
1% of participating employees’ contribution and 50% of the next 5% of participating employees’ contribution, for a
maximum of 3.5% employer contribution. Effective March 31, 2020, the Company contributes 100% of the first 1% of
participating employees’ contribution and 50% of the next 6% of participating employees’ contribution, for a maximum of
4.0% of employer contribution. Participants are immediately vested in their employee contributions; employer
contributions are vested over a three-year period with one-third for each year of a participating employee’s service.
Employer contributions made for the years ended December 31, 2020, 2019, and 2018 were $0.8 million, $0.6 million and
$0.5 million, respectively.

12. Condensed Quarterly Financial Data (unaudited)

The following table contains selected unaudited financial data for each quarter of 2020 and 2019. The unaudited

information should be read in conjunction with the Company’s financial statements and related notes included elsewhere in
this Annual Report. The Company believes that the following information reflects all normal recurring adjustments
necessary for a fair presentation of the information for the periods presented. The operating results for any quarter are not
necessarily indicative of results for any future period.

Quarterly Financial Data (in thousands, except per share data):

Total revenue
Loss from operations
Net loss
Basic net loss per common share
Diluted net loss per common share

Total revenue
Income (loss) from operations
Net income (loss)
Basic net income (loss) per common share
Diluted net income (loss) per common share

$

$

$

     March 31,
32,385
(8,777)
(8,074)
(0.14)
(0.14)

    $

March 31,
111,939
78,244
80,045
1.42
1.38

2020 Quarter Ended

June 30,

    September 30,     December 31,  

$

13,089
(37,600)
(35,018)
(0.61)
(0.61)

$

35,366
(16,722)
(12,550)
(0.22)
(0.22)

41,854
(13,698)
(13,691)
(0.24)
(0.24)

2019 Quarter Ended

September 30, December 31,  
$
$

21,760
(14,276)
(10,224)
(0.18)
(0.18)

3,516
(30,572)
(26,912)
(0.47)
(0.47)

June 30,

19,485
(19,572)
(16,034)
(0.28)
(0.28)

Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Not applicable.

Item 9A.  Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our
disclosure controls and procedures as of December 31, 2020. The term "disclosure controls and procedures," as defined in
Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are
designed to ensure that information required to be disclosed by us in the reports that we file or submit under the

112

 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and
forms and that such information is accumulated and communicated to our management, including our Chief Executive
Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. Based on this
evaluation our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures
were effective as of December 31, 2020 at the reasonable assurance level.

Management’s 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 15d-15(f) under the Securities Exchange Act of 1934, as amended). Our management,
Chief Executive Officer and Chief Financial Officer, assessed the effectiveness of our internal control over financial
reporting as of December 31, 2020. In making this assessment, our management used the criteria set forth by the
Committee of Sponsoring Organizations of the Treadway Commission (2013 Framework) (COSO) in Internal Control—
Integrated Framework. Based on that assessment and using the COSO criteria, our management, Chief Executive Officer
and Chief Financial Officer have concluded that, as of December 31, 2020, our internal control over financial reporting was
effective.

Changes in Internal Control over Financial Reporting

There has been no change in our internal control over financial reporting during the year ended December 31,

2020, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitations of Controls

Management does not expect that our disclosure controls and procedures or our internal control over financial

reporting will prevent or detect all error and all fraud. Controls and procedures, no matter how well designed and operated,
can provide only reasonable assurance of achieving their objectives, and management necessarily applies its judgment in
evaluating the cost-benefit relationship of possible controls and procedures. Because of the inherent limitations in all
control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if
any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-
making can be faulty and that breakdowns can occur because of a 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 management override of
the controls. The design of any system of controls also is based in part upon certain assumptions about the likelihood of
future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential
future conditions. Over time, controls may become inadequate because of changes in conditions or deterioration in the
degree of compliance with the policies or procedures. Because of the inherent limitations in a cost-effective control system,
misstatements due to error or fraud may occur and not be detected.

Attestation in Internal Control over Financial Reporting

RSM US LLP, our independent registered public accounting firm, has audited our financial statements for the year

ended December 31, 2020 and has issued an audit report on the effectiveness of the Company’s internal control over
financial reporting as of December 31, 2020, which is included in Item 8 of this Annual Report.

Item 9B.  Other Information

Not applicable.

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Table of Contents

Item 10.  Directors, Executive Officers and Corporate Governance

PART III

We have adopted a code of ethics for directors, officers (including our principal executive officer, principal
financial officer and principal accounting officer) and employees, known as the Code of Business Conduct and Ethics. The
Code of Business Conduct and Ethics is available on our website at http://www.xencor.com under the Corporate
Governance section of our Investor Relations page. We will promptly disclose on our website (i) the nature of any
amendment to the policy that applies to our principal executive officer, principal financial officer, principal accounting
officer or controller, or persons performing similar functions and (ii) the nature of any waiver, including an implicit waiver,
from a provision of the policy that is granted to one of these specified individuals that is required to be disclosed pursuant
to SEC rules and regulations, the name of such person who is granted the waiver and the date of the waiver.

The other information required by this item and not set forth below will be set forth in our 2021 Annual Meeting

of Stockholders (Proxy Statement) to be filed with the SEC within 120 days after the end of the fiscal year ended
December 31, 2020 and is incorporated herein by reference.

Audit Committee

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by

reference.

Item 11.  Executive Compensation

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by

reference.

Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by

reference.

Item 13.  Certain Relationships and Related Transactions, and Director Independence

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by

reference.

Item 14.  Principal Accounting Fees and Services

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by

reference.

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Item 15.  Exhibits, Financial Statement Schedules

1.

Financial Statements.  We have filed the following documents as part of this Annual Report:

Report of Independent Registered Public Accounting Firm (RSM US LLP)
Balance Sheets
Statements of Comprehensive Income (Loss)
Statements of Stockholders’ Equity
Statements of Cash Flows
Notes to Financial Statements

Page
76
79
80
81
82
83

Financial Statement Schedules.  All schedules have been omitted because they are not applicable or 

2.
required, or the information required to be set forth therein is included in the Financial Statements or notes thereto 
included in Item 8 of this Annual Report on Form 10-K.

3.

Exhibits.

Exhibit
Number

Description

3.1

3.2

4.1

4.2*

4.3

10.1*

10.2*

10.3*

Amended and Restated Certificate of Incorporation of the Company (incorporated by reference to
Exhibit 3.1 to the Company’s Current Report on Form 8-K, filed with the SEC on December 11, 2013).

Amended and Restated Bylaws of the Company (incorporated by reference to Exhibit 3.2 to the
Company’s Current Report on Form 8-K, filed with the SEC on December 11, 2013).

Form of Common Stock Certificate of the Company (incorporated by reference to Exhibit 4.1 to the
Company’s Registration Statement on Form S-1, as amended (File No. 333-191689), originally filed
with the SEC on October 25, 2013).

Third Amended and Restated Investor Rights Agreement, dated June 26, 2013, among the Company and
certain of its stockholders incorporated by reference to Exhibit 4.2 to the Company’s Registration
Statement on Form S-1, as amended (File No. 333-191689), originally filed with the SEC on October 11,
2013).

Description of the Common Stock of the Company (incorporated by reference to Exhibit 4.3 to the
Company’s Form 10-K filed with the SEC on February 25, 2020).

Form of Indemnity Agreement between the Company and its directors and officers (incorporated by
reference to Exhibit 10.1 to the Company’s Registration Statement on Form S-1, as amended (File
No. 333-191689), originally filed with the SEC on October 11, 2013).

Xencor, Inc. 2010 Equity Incentive Plan, as amended, and Form of Stock Option Grant Notice, Option
Agreement and Form of Notice of Exercise (incorporated by reference to Exhibit 10.2 to the Company’s
Registration Statement on Form S-1, as amended (File No. 333-191689), originally filed with the SEC
on October 11, 2013).

Xencor, Inc. 2013 Equity Incentive Plan and Form of Stock Option Agreement and Form of Stock
Option Grant Notice thereunder (incorporated by reference to Exhibit 10.3 to the Company’s
Registration Statement on Form S-1, as amended (File No. 333-191689), originally filed with the SEC
on October 11, 2013).

115

    
Table of Contents

10.4*

10.5*

10.6*

10.7*

10.8*

10.9†

10.10†

10.11†

10.12

10.13

10.14†

10.15*

Xencor, Inc. 2013 Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.4 to the
Company’s Registration Statement on Form S-1, as amended (File No. 333-191689), originally filed
with the SEC on October 11, 2013).

Second Amended and Restated Executive Employment Agreement, dated January 1, 2007, by and
between the Company and Dr. Bassil I. Dahiyat (incorporated by reference to Exhibit 10.6 to the
Company’s Registration Statement on Form S-1, as amended (File No. 333-191689), originally filed
with the SEC on October 11, 2013).

Amended and Restated Executive Employment Agreement, dated September 4, 2013, by and between
the Company and Dr. Bassil I. Dahiyat (incorporated by reference to Exhibit 10.12 to the Company’s
Registration Statement on Form S-1, as amended (File No. 333-191689), originally filed with the SEC
on October 11, 2013).

Amended and Restated Severance Agreement, dated September 5, 2013, by and between the Company
and Dr. John R. Desjarlais (incorporated by reference to Exhibit 10.14 to the Company’s Registration
Statement on Form S-1, as amended (File No. 333-191689), originally filed with the SEC on October 11,
2013).

Amended and Restated Change in Control Agreement, dated September 5, 2013, by and between the
Company and John J. Kuch (incorporated by reference to Exhibit 10.15 to the Company’s Registration
Statement on Form S-1, as amended (File No. 333-191689), originally filed with the SEC on October 11,
2013).

Collaboration and License Agreement, dated June 27, 2010, by and between the Company and
MorphoSys AG (incorporated by reference to Exhibit 10.19 to the Company’s Registration Statement on
Form S-1, as amended (File No. 333-191689), originally filed with the SEC on October 11, 2013).

First Amendment to the Collaboration and License Agreement, dated March 23, 2012, by and between
the Company and MorphoSys AG (incorporated by reference to Exhibit 10.20 to the Company’s
Registration Statement on Form S-1, as amended (File No. 333-191689), originally filed with the SEC
on October 11, 2013).

Cross-License Agreement, dated December 19, 2012, by and between the Company and
MedImmune, LLC (incorporated by reference to Exhibit 10.26 to the Company’s Registration Statement
on Form S-1, as amended (File No. 333-191689), originally filed with the SEC on October 11, 2013).

Lease dated January 1, 2015 by and between the Company and BF Monrovia, LLC (incorporated by
reference to Exhibit 99.1 to the Company’s Form 8-K filed with the SEC on January 5, 2015).

Amendment to Lease dated January 27, 2015 by and between the Company and BF Monrovia, LLC.
(incorporated by reference to Exhibit 10.27 to the Company’s Form 10-K filed with the SEC on February
20, 2015).

Research and License Agreement effective September 15, 2015 between the Company and Amgen Inc.,
(incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed with the SEC on
November 4, 2015).

Severance Agreement, dated May 26, 2016 by and between the Company and Bassil Dahiyat
(incorporated by reference to Exhibit 10.1 to the Company's Form 10-Q filed with the SEC on August 3,
2016).

10.16*

Severance Agreement, dated May 26, 2016 by and between the Company and John Kuch (incorporated
by reference to Exhibit 10.2 to the Company's Form 10-Q filed with the SEC on August 3, 2016).

116

Table of Contents

10.17*

10.18†

10.29†

10.20

10.21

10.22†

10.23*

10.24*

10.25*

10.26

10.27

10.28

10.29

10.30

10.31

Severance Agreement, dated May 26, 2016 by and between the Company and John Desjarlais
(incorporated by reference to Exhibit 10.3 to the Company's Form 10-Q filed with the SEC on August 3,
2016).

Collaboration and License Agreement, dated June 26, 2016, by and between the Company and Novartis
Institutes for BioMedical Research, Inc. (incorporated by reference to Exhibit 10.6 to the Company's
Form 10-Q filed with the SEC on August 3, 2016).

Amendment No. 1, dated September 21, 2016, to the Collaboration and License Agreement by and
between the Company and Novartis Institutes for BioMedical Research, Inc. (incorporated by reference
to Exhibit 10.2 to the Company's Form 10-Q filed with the SEC on November 2, 2016).

Office Lease, dated June 21, 2017, by and among the Company and PRII High Bluffs LLC and Collins
Corporate Center Partners, LLC (incorporated by reference to Exhibit 99.1 to the Company’s Form 8-K
filed with the SEC on June 26, 2017).

Second Amendment to Lease, dated July 5, 2017, by and between the Company and 111 Lemon
Investors LLC (incorporated by reference to Exhibit 99.1 to the Company’s Form 8-K filed with the SEC
on July 10, 2017).

Collaboration and License Agreement, dated February 4, 2019, by and between the Company and
Genentech, Inc. and F. Hoffman-La Roche LTD (incorporated by reference to Exhibit 10.1 to the
Company’s Form 10-Q filed with the SEC on May 9, 2019).

Xencor, Inc. Amended and Restated Non-Employee Director Compensation Policy (incorporated by
reference to Exhibit 10.1 to the Company’s Form 10-Q filed with the SEC on November 5, 2019).

Employment Agreement dated August 5, 2019 by and between the Company and Celia Eckert
(incorporated by reference to Exhibit 10.33 to the Company’s Form 10-K filed with the SEC on February
25, 2020).

Employment Agreement dated November 13, 2019 by and between the Company and Dr. Allen Yang,
M.D., Ph.D. (incorporated by reference to Exhibit 10.34 to the Company’s Form 10-K filed with the SEC
on February 25, 2020).

Third Amendment to Lease, dated April 30, 2020, by and between the Company and 111 Lemon
Investors LLC (incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed with the
SEC on August 5, 2020).

Xencor, Inc. Amended and Restated Non-Employee Director Compensation Policy (incorporated by
reference to Exhibit 10.1 to the Company’s Form 10-Q filed with the SEC on November 6, 2020).

Fourth Amendment to Lease, dated September 30, 2020, by and between the Company and 111 Lemon
Investors LLC (incorporated by reference to Exhibit 10.2 to the Company’s Form 10-Q filed with the
SEC on November 6, 2020).

First Amendment to the Research and License Agreement, dated November 22, 2019, by and between
the Company and Amgen Inc.

Amendment to the Cross-License Agreement, dated January 2, 2020, by and between the Company and
MedImmune, LLC.

Second Amendment to the License Agreement, dated January 8, 2020, by and between the Company and
MorphoSys AG.

117

Table of Contents

10.32

10.33

10.34

23.1

31.1

31.2

32.1**

32.2**

Third Amendment to the License Agreement, dated July 13, 2020, by and between the Company and
MorphoSys AG.

Fifth Amendment to Lease, dated October 31, 2020, by and between the Company and 111 Lemon
Investors LLC.

Collaboration and License Agreement, dated December 4, 2020, by and between the Company and
Janssen Biotech, Inc.

Consent of Independent Registered Public Accounting Firm (RSM US LLP).

Certification of the Principal Executive Officer pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities
Exchange Act of 1934.

Certification of the Principal Financial Officer pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities
Exchange Act of 1934.

Certification of the Principal Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant
to Section 906 of the Sarbanes-Oxley Act of 2002.

Certification of the Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant
to Section 906 of the Sarbanes-Oxley Act of 2002.

101.INS

XBRL Instance Document – The instance document does not appear in the Interactive Data File because
its XBRL tags are embedded within the inline XBRL document.

101.SCH

XBRL Taxonomy Extension Schema Document.

101.CAL

XBRL Taxonomy Extension Schema Document.

101.DEF

XBRL Taxonomy Extension Definition Linkbase Document.

101.LAB

XBRL Taxonomy Extension Label Linkbase Document.

101.PRE

XBRL Taxonomy Extension Presentation Linkbase Document.

104

104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

†            We have received confidential treatment for certain portions of this agreement, which have been omitted and filed

separately with the SEC pursuant to Rule 406 under the Securities Act of 1933, as amended.

*            Indicates management contract or compensatory plan.

**          These certifications are being furnished solely to accompany this annual report pursuant to 18 U.S.C.

Section 1350, and are not being filed for purposes of Section 18 of the Securities Exchange Act of 1934 and are
not to be incorporated by reference into any filing of the Company, whether made before or after the date hereof,
regardless of any general incorporation language in such filing.

Item 16.  Form 10-K Summary

None.

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Table of Contents

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Company has

duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

Date: February 23, 2021

Xencor, Inc.

By:

/s/ BASSIL I. DAHIYAT, PH.D.
Bassil I. Dahiyat, Ph.D.
President & Chief Executive Officer

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and

appoints Bassil I. Dahiyat, Ph.D. and John J. Kuch, and each of them, his true and lawful attorneys-in-fact, each with full
power of substitution, for him in any and all capacities, to sign any amendments to this Annual Report on Form 10-K and
to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange
Commission, hereby ratifying and confirming all that each of said attorneys-in-fact or their substitute or substitutes may do
or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the

following persons on behalf of the Company and in the capacities and on the dates indicated.

Signature

Title

Date

/s/ BASSIL I. DAHIYAT, PH.D.
Bassil I. Dahiyat, Ph.D.

Director, President & Chief Executive
Officer (Principal Executive Officer)

February 23, 2021

/s/ JOHN J. KUCH

John J. Kuch

Sr. Vice President & Chief Financial
Officer (Principal Financial and
Accounting Officer)

/s/ A. BRUCE MONTGOMERY, M.D.
A. Bruce Montgomery, M.D.

/s/ KURT GUSTAFSON
Kurt Gustafson

/s/ YUJIRO S. HATA
Yujiro S. Hata

/s/ KEVIN C. GORMAN, PH.D.
Kevin C. Gorman, Ph.D.

/s/ RICHARD RANIERI
Richard Ranieri

/s/ ELLEN G. FEIGAL, M.D.
Ellen G. Feigal, M.D.

/s/ DAGMAR ROSA-BJORKESON
Dagmar Rosa-Bjorkeson

Director

Director

Director

Director

Director

Director

Director

119

February 23, 2021

February 23, 2021

February 23, 2021

February 23, 2021

February 23, 2021

February 23, 2021

February 23, 2021

February 23, 2021

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH
NOT  MATERIAL  AND  WOULD  LIKELY  CAUSE  COMPETITIVE  HARM  TO  THE  REGISTRANT  IF  PUBLICLY
DISCLOSED AND HAS BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

Execution Version

AMENDMENT No. 1
to the Research and License Agreement
between Xencor, Inc. and Amgen Inc.

Exhibit 10.29

This Amendment No. 1 (“Amendment”) is entered into as of November 22, 2019 (“Amendment No. 1 Effective
Date”)  by  and  between  Xencor,  Inc.,  a  corporation  organized  under  the  laws  of  the  State  of  Delaware
(“Xencor”),  having  an  address  of  111  West  Lemon  Avenue,  Monrovia,  California  91016  and  Amgen  Inc.,  a
Delaware  corporation  having  its  principal  place  of  business  at  One  Amgen  Center  Drive,  Thousand  Oaks,
California 91320- 1799, USA (“Amgen”). Xencor and Amgen are each referred to individually as a “Party” and
together as the “Parties”.

WHEREAS,  Xencor  and  Amgen  are  parties  to  a  Research  and  License  Agreement  dated  as  of

September 15, 2015 (the “Agreement”);

WHEREAS, the Parties mutually desire to amend, modify and restate certain terms and conditions of

the Agreement regarding the payment of a certain milestone payment;

NOW THEREFORE, in consideration of the mutual promises contained herein, and for other good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby  acknowledged,  and  intending  to  be
legally bound, the Parties hereto agree as follows:

1.

DEFINITIONS

Unless  otherwise  defined  herein,  capitalized  words  in  this  Amendment  shall  have  the  meaning
attributed to them in the Agreement.

The following defined term is added to the Agreement:

[***]

2.

AMENDMENT

The  Parties  agree  that,  as  of  the  Amendment  No.  1  Effective  Date,  the  Agreement  is  amended  as  set
forth in this Section 2.

Section 7.2 (a)(ii) of the Agreement is deleted in its entirety and replaced with the following:

“(ii) with respect to the first occurrence of the corresponding Milestone for a Product

containing or comprising a Discovery Program Compound:

1. Development Milestones

Milestone

(a) [***]
(b) [***]
(c) [***]
(d) [***]
(e) [***]
(f) [***]

(g) [***]

2. Sales Milestones

(a) [***]

(b) [***]

Milestone
Payment

$      [***]
$      [***]
$      [***]
$      [***]
$      [***]
$      [***]

$      [***]

$      [***]

$      [***]

3. Total Milestone Payments for each Discovery Program

$      260,500,000

3.

INTEGRATION

Except for the section of the Agreement specifically amended hereunder, all terms and conditions of the
Agreement  remain  and  shall  remain  in  full  force  and  effect.  This  Amendment  shall  hereafter  be
incorporated into and deemed part of the Agreement and any future reference to the Agreement shall
include the terms and conditions of this Amendment.

4.

APPLICABLE LAW & JURISDICTION

This Amendment shall be governed by, and construed in accordance with, the laws which govern the
Agreement, and the Parties submit to the jurisdiction and dispute resolution provisions as set forth in the
Agreement.

5.

COUNTERPARTS

This Amendment may be executed in counterparts with the same effect as if both Parties had signed the
same document. All such counterparts shall be deemed an original, shall be construed together and shall
constitute  one  and  the  same  instrument.  Signature  pages  of  this  Amendment  may  be  exchanged  by
facsimile or other electronic means without affecting the validity thereof.

[Remainder of Page Intentionally Left Blank - Signature Page to Follow]

Amgen Contract No:

Page 2 of 3

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH
NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY
DISCLOSED AND HAS BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

IN WITNESS WH ERE OF, the Par tie s intend i ng to be bound have caused this Amendment to be executed
by their duly authorized representatives.

Execution Version

Amgen Contract No:

Page 3 of 3

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH
NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY
DISCLOSED AND HAS BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS
BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

AMENDMENT TO THE CROSS-LICENSE AGREEMENT
BY AND BETWEEN
MEDIMMUNE, LLC AND XENCOR, INC.

Exhibit 10.30

This  amendment  ("Amendment")  to  the  license  agreement  effected  December  19,  2012  (the
"Agreement") by and between MedImmune, LLC, a limited liability company organized under
the  laws  of  Delaware,  having  a  principal  place  of  business  at  One  MedImmune  Way,
Gaithersburg  MD  20878  (“MedImmune”)  and  Xencor,  Inc.,  a  Delaware  corporation  with  an
office at 111 W. Lemon Ave.,  Monrovia,  CA  91016  ("Xencor"),  is  effective  as  of  January  2,
2020.  Capitalized terms not otherwise defined herein shall have the meaning ascribed in the
Agreement.

WHEREAS,  MedImmune  and  Xencor  desire  to  amend  the  Agreement  in  order  to  make  the
process of milestone payments more efficient; and

WHEREAS, MedImmune began doing business as AstraZeneca in February of 2019.

NOW  THEREFORE,  in  consideration  of  the  mutual  promises  and  covenants  herein  contained,
Xencor and MedImmune hereby agree to the following terms:

1.

Section 2.5 (b) shall be deleted and replaced with the following:

“providing reports pursuant to Section 5.4 of the [***] License to

[***]

2.

The first paragraph of Section 6.1 shall be deleted and replaced with the following:

“Xencor  shall  make  payments  to  [***]  pursuant  to  Section  5  of  the  [***]
License  and  calculated  according  to  the  terms  of  the  [***]  License  as
applied  to  all  activities,  achievements  and  sales  pursuant  to  Xencor’s
sublicense  hereunder  of  [***]’s  interest  in  those  MedImmune  Patents  co-
owned  by  MedImmune.  Xencor  shall  make  payments  pursuant  to  Section
5.1 (c) of the [***] License within thirty (30) days of each milestone event
and payments pursuant to Section 5.1 (d) of the [***] License shall be due
and payable by March 1 of each year during the term of the [***] License.”

3.

Section 6.2 shall be deleted and replaced with the following sentence:

“All  payment  to  [***]  shall  be  made  via  the  following  methods  unless
advised differently by [***]:

[***]

4.

Except as expressly and unambiguously stated herein, all other terms and conditions of
the Agreement, as amended, shall remain in full force and effect.

[Signature Page Follows]

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS
BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

2

IN WITNESS WHEREOF, the parties have caused this Amendment to be executed by their duly
authorized representatives.

XENCOR, INC.

MEDIMMUNE, LLC

By: 

/s/ Bassil Dahiyat

By: 

/s/ Gail Wasserman

Name: Bassil Dahiyat

Title:  President & CEO

Date:  03 January 2020

Name:  Gail Wasserman

Title: 

Date:  13 January 2020

Acknowledged by:

[***]

By: 

[***]

Name: [***]

Title:  [***]

04 January 2020

Date: 
[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS
BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

3

  
 
  
   
 
  
 
  
   
 
  
   
 
  
   
 
    
  
   
 
      
   
   
   
 
    
  
   
 
    
  
   
 
  
 
  
   
   
   
 
  
   
   
   
 
    
  
   
   
   
 
      
 
  
 
Execution Version

FIRST AMENDMENT TO THE LICENSE AGREEMENT
BY AND BETWEEN
XENCOR, INC. AND MorphoSys AG

Exhibit 10.31

This first amendment ("Amendment") to the COLLABORATION  AND  LICENSE  AGREEMENT  dated
June 27, 2010 (the “Agreement”) by and between XENCOR, INC., a Delaware corporation with
its  principal  offices  at  111  West  Lemon  Avenue,  Monrovia,  CA  91016  (“Xencor”),  and
MORPHOSYS  AG,  a  German  corporation  with  its  principal  offices  at  Semmelweisstrasse  7,
82152  Planegg,  Germany  (“MorphoSys”)  is  effective  as  of  the  date  of  last  signature  to  this
Amendment.  Capitalized terms not otherwise defined herein shall have the meanings ascribed
in the Agreement.

WHEREAS,  the  Agreement,  as  more  specifically  set  forth  therein,  affords  Xencor  the  right  to
have its name and logo on all Licensed Product labeling and promotional materials; and

WHEREAS,  Xencor  and  MorphoSys  have  agreed  to  amend  the  Agreement  to  provide  for
inclusion  of  an  approved  statement  in  any  media  release  referencing  and  in  any  publication
regarding the Licensed Product instead of including Xencor’s name and logo on all Licensed
Product labeling and promotional materials.

NOW  THEREFORE,  in  consideration  of  the  mutual  promises  and  covenants  herein  contained,
Xencor and MorphoSys hereby agree to the following terms:

1.

Section  3.6  of  the  Agreement  shall  be  deleted  in  its  entirety  and  be  replaced  by  the
following paragraph:

“3.6 Allocation of Responsibility for Further Development and
Commercialization.  Other than Xencor’s responsibilities with respect to the Ongoing 
Phase 1 Trial, MorphoSys shall be responsible for all further development of Licensed 
Antibody(ies) and/or Licensed Products for, and commercialization (including 
marketing, promotion and sales) of Licensed Products in the MorphoSys Territory for 
the Field.  MorphoSys (and its Affiliates and Sublicensees) shall have the right to file in 
its own name, and to own, all new INDs, Marketing Authorization Applications and 
Marketing Authorizations for Licensed Products in the MorphoSys Territory for the 
Field and may delegate and/or assign these rights to Affiliates and Sublicensees.  As 
between the Parties, MorphoSys shall have the sole and exclusive right to select the 
product trademarks for the Licensed Products in the MorphoSys Territory for the Field 
(and may delegate and/or assign this right to Affiliates and Sublicensees).  Regardless 
of whether Licensed Product is marketed by MorphoSys or a Sublicensee, Licensed 
Product labeling, packaging and promotional materials shall neither be required to state 
that the Licensed Product is under license from Xencor (or its successor), nor include 
the Xencor name or Xencor logo.”

Execution Version

2.

The following sentence shall be added at the end of Section 7.4 of the Agreement:

“For (i) any media release (but excluding legally required ad hoc-announcements) by
MorphoSys, by any Sublicensee of the Licensed Product or by any of their respective
Affiliates referencing the Licensed Product, the statement set forth in Exhibit N 
(attached hereto) or an alternative statement approved by both Parties in writing, shall 
be included in the section containing background information on the Licensed Product; 
and  (ii) any peer-reviewed publication regarding the Licensed Product  with co-
authorship of an employee of MorphoSys, any Sublicensee of the Licensed Product or 
by any of their respective Affiliates shall include, to the extent possible, the statement 
set forth in Exhibit N, in e.g., the Materials and Methods section, the
acknowledgements or the references at the discretion of the lead author and publisher;
provided that if a publisher will not approve its inclusion, the Parties will work together
to craft a disclosure regarding the license of the Licensed Product from Xencor by
MorphoSys that the publisher will approve (if any).”

This Amendment will be construed in accordance with, and governed in all respects by,
the  laws  of  the  State  of  New  York  (without  giving  effect  to  principles  of  conflicts  of
law).

All  other  terms  of  the  Agreement  shall  remain  unchanged  and,  except  as  expressly
amended  hereby,  the  Agreement  shall  continue  in  full  force  and  effect.  This  Letter
Agreement  is  incorporated  and  made  a  part  of  the  Agreement.  In  the  event  of  any
conflict or inconsistency between the Agreement and this Letter Agreement, the latter
shall prevail.

[Remainder of page intentionally left blank.]

3.

4.

2

Execution Version

IN WITNESS WHEREOF, the parties have caused this Amendment to be executed by their duly
authorized representatives.

Xencor

MorphoSys

MorphoSys

3

Execution Version

Exhibit N

Approved Statement

About tafasitamab (MOR208)

Tafasitamab (MOR208) is an investigational humanized Fc-engineered monoclonal antibody
directed against CD19.1 In 2010, MorphoSys licensed exclusive worldwide rights to develop
and commercialize tafasitamab from Xencor, Inc. Tafasitamab incorporates an XmAb(R)
engineered Fc domain, which is intended to lead to a significant potentiation of antibody-
dependent cell-mediated cytotoxicity (ADCC) and antibody-dependent cellular phagocytosis
(ADCP), thus aiming to improve a key mechanism of tumor cell killing.

… [Note: MorphoSys may add, following this statement, at its sole discretion and without
requiring Xencor’s approval, further information on tafasitamab, the target, the development of
tafasitamab, respective clinical trials, marketing authorizations and relevant indications etc.]

[Add to trademark line:] XmAb(R) is a trademark of Xencor, Inc.

1 MorphoSys may update this statement at its sole discretion e.g. depending on Licensed Product status.

4

Execution Version

CONFIDENTIAL

Exhibit 10.32

THIRD AMENDMENT TO THE LICENSE AGREEMENT
BY AND BETWEEN
XENCOR, INC. AND MorphoSys AG

This  third  amendment  ("Amendment")  to  the  COLLABORATION  AND  LICENSE  AGREEMENT
dated  June  27,  2010,  as  amended  on  March  23,  2012,  and  on  January  8,  2020  (such  second
amendment being wrongly named “first amendment” thereunder shall be regarded and referred
to as the second amendment) (collectively, the “Agreement”), by and between XENCOR, INC., a
Delaware  corporation  with  its  principal  offices  at  111  West  Lemon  Avenue,  Monrovia,  CA
91016,  USA  (“Xencor”),  and  MORPHOSYS  AG,  a  German  corporation  with  its  principal
offices at Semmelweisstrasse 7, 82152 Planegg, Germany (“MorphoSys”) is effective as of the
date of last signature to this Amendment. Capitalized terms not otherwise defined herein shall
have the meanings ascribed in the Agreement.

WHEREAS,  the  Agreement,  as  more  specifically  set  forth  in  its  second  amendment,  provides
for  the  inclusion  of  an  approved  statement  in  any  media  release  referencing  and  in  certain
publications regarding the Licensed Product; and

WHEREAS,  Xencor  and  MorphoSys  have  agreed  to  amend  the  Agreement  to  provide  for  a
change of such approved statement and a potential further change.

NOW THEREFORE,  in  consideration  of  the  mutual  promises  and  covenants  herein  contained,
Xencor and MorphoSys hereby agree to the following terms:

1.

2.

3.

Exhibit N to the Agreement shall be deleted in its entirety and be replaced by the  new
Exhibit N attached hereto.

This Amendment will be construed in accordance with, and governed in all respects by,
the  laws  of  the  State  of  New  York  (without  giving  effect  to  principles  of  conflicts  of
law).

All  other  terms  of  the  Agreement  shall  remain  unchanged  and,  except  as  expressly
amended  hereby,  the  Agreement  shall  continue  in  full  force  and  effect.  This
Amendment  is  incorporated  and  made  a  part  of  the  Agreement.  In  the  event  of  any
conflict or inconsistency between the Agreement and this Amendment, the latter shall
prevail.

[Remainder of page intentionally left blank.]

Execution Version

CONFIDENTIAL

IN WITNESS WHEREOF, the parties have caused this Amendment to be executed by their
duly authorized representatives.

Xencor

By:
Name:
Title:
Date:

Bassil Dahiyat, PhD
President and CEO
July 13, 2020

MorphoSys AG

      MorphoSys AG

By:
Name: i.V. Dr. Barbara Krebs-Pohl
Title: SVP, Head of Global BD&L and

      By:
      Name: i.A. Dr. Stefan Mitterreiter
      Title: Associate Director, Global BD&L and

Alliance Management
July 13, 2020

Date:

      Date:

Alliance Management
July 13, 2020

2

Execution Version

CONFIDENTIAL

Exhibit N

Approved Statement

About tafasitamab (MOR208)*

Tafasitamab (MOR208) is an investigational humanized Fc-engineered monoclonal antibody
directed against CD19.*
In 2010, MorphoSys licensed exclusive worldwide rights to develop and commercialize
tafasitamab from Xencor, Inc. Tafasitamab incorporates an XmAb® engineered Fc domain,
which mediates B-cell lysis through apoptosis and immune effector mechanism including
antibody-dependent cell-mediated cytotoxicity (ADCC) and antibody-dependent cellular
phagocytosis (ADCP).**

… [Note: MorphoSys may add, following this statement, at its sole discretion and without
requiring Xencor’s approval, further information on tafasitamab, the target, the development of
tafasitamab, respective clinical trials, marketing authorizations and relevant indications etc.]

Add to trademark line: XmAb® is a trademark of Xencor, Inc.

* MorphoSys may update this statement at its sole discretion e.g. depending on Licensed Product
status.
** MorphoSys may update this statement, without Xencor’s prior approval, to mirror the final
language agreed with the FDA in Section 12 of the prescribing information.

3

FIFTH AMENDMENT TO LEASE

Exhibit 10.33

This FIFTH AMENDMENT TO LEASE (this “Amendment”) is made and effective as of October
31,  2020  (the  “Effective  Date”)  by  and  between  111  LEMON  INVESTORS  LLC,  a  California
limited liability company successor-in-interest to BF Monrovia, LLC, a California limited liability
company  (“Landlord”)  and  XENCOR,  INC.,  a  Delaware  corporation  successor-in-interest  to
Xencor, Inc., a California corporation (“Tenant”).

R E C I T A L S:

A.

Landlord and Tenant entered into that certain Lease dated as of January 1, 2015 (the
“Original Lease”) whereby Landlord leased to Tenant and Tenant leased from Original Landlord
that certain space containing approximately 24,573 rentable square feet, comprising the entirety of
the  second  (2nd)  floor  (the  “2nd  Floor  Premises”)  of  that  certain  building  located  at  111  West
Lemon Street, Monrovia, California 91016 (the “Building”).

B.

The Original Lease was amended by (i) that certain Amendment to Lease dated as
of January 26, 2015, by and between Landlord and Tenant, (ii) the Second Amendment to Lease,
dated as of July 5, 2017, wherein an additional 23,652 comprising the Third Floor was added to the
2nd Floor Premises as an Expansion Space (“3rd Floor Premises”) (the 2nd Floor Premises and 3rd
Floor  Premises  shall  collectively  be  referred  to  in  the  Lease  as  the  “Premises”),  (iii)  the  Third
Amendment  to  Lease  dated  as  of  April  30,  2020,  wherein  the  term  of  the  Original  Lease  was
extended through September 30, 2020, (iv) the Fourth Amendment wherein the term was extended
to  October  31,  2020  (the  Original  Lease,  as  amended  by  the  First  Amendment,  Second
Amendment, Third Amendment and Fourth Amendment may be referred to herein collectively as
the “Lease.”)

C.

The parties desire to amend the Lease to (i) extend the term of the Lease as to the
2nd  Floor  Premises,  and  to  (ii)  otherwise  modify  the  Lease,  all  upon  the  terms  and  conditions
hereinafter set forth.

A G R E E M E N T:

NOW, THEREFORE, in consideration of the foregoing recitals and the mutual covenants
contained  herein,  and  for  other  good  and  valuable  consideration,  the  receipt  and  sufficiency  of
which are hereby acknowledged, the parties hereto hereby agree as follows:

1.

Capitalized  Terms.    All  capitalized  terms  when  used  herein  shall  have  the  same
meanings  given  such  terms  in  the  Lease  unless  expressly  superseded  by  the  terms  of  this
Amendment.  All references in the Lease and in this Amendment to “the Lease” or “this Lease”

Fifth Amendment to Lease

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MONROVIA, CA
[Xencor]

shall  be  construed  to  mean  the  Lease  referenced  above  as  amended  and  supplemented  by  this
Amendment.

2.

2nd Floor Space – Extension of Term/Base Year.  Pursuant to this Amendment, the
Commencement  Date  for  the  2nd  Floor  Premises  shall  be  November  1,  2020  (the  “2nd  Floor
Commencement Date”).  The Term for the 2nd Floor Premises shall expire on the last day of the
calendar month that is Sixty-Two (62) months from the 2nd Floor Premises Commencement Date
(the “2nd Floor Space Term”), unless sooner terminated or extended as hereafter provided.  

3.

2nd Floor Space Base Rent.  Effective as of the 2nd Floor Premises Commencement
Date,  the  Base  Rent  payable  by  Tenant  for  the  2nd  Floor  Premises  shall  be  as  set  forth  in  the
following schedule, but otherwise in accordance with the terms and conditions of the Lease:

Months of 
2nd Floor Space
Term

Annual
Base Rent

Monthly Installment
of Base Rent

Estimated Monthly
Rental Rate Per RSF
of 2nd Floor Space

11/01/20 – 10/30/21*

$663,471

$55,289.25

11/01/21 – 10/30/22

$683,375.13

$56,947.93

11/01/22 – 10/30/23

$703,876.38

$58,656.37

11/01/23 – 10/30/24

$724,992.67

$60,416.06

11/01/24 – 10/30/25*

$746,742.48

$62,228.54

11/01/25 – 12/31/25

N/A

$64,095.40

$2.25

$2.32

$2.39

$2.46

$2.53

$2.61

*The Base Rent for  the  2nd  Floor  Space  shall  be  completely  abated  for  months Two (2),
Three  (3),  and  Sixty  (60)  of  the  2nd  Floor  Space  Term  (the  “Base  Rent  Abatement  Period”).
 During the Base Rent Abatement Period, Tenant shall remain responsible for the payment of all of
its other monetary obligations under the Lease.  If Tenant shall be in default under the Lease during
the  Base  Rent  Abatement  Period  and  shall  fail  to  cure  such  default  within  the  notice  and  cure
period,  if  any,  permitted  for  cure  pursuant  to  this  Lease,  and  this  Lease  shall  be  terminated  and
Tenant evicted in an unlawful detainer proceeding on account of such default then the abatement of
Base Rent provided for in this paragraph shall immediately become void, the Base Rent payable by
Tenant to Landlord shall immediately equal the amount set forth above without abatement, and in
such event, then as part of the recovery by Landlord set forth in Section 17 of the Original Lease in
connection therewith, Landlord shall be entitled to the recovery of the then unamortized amount of
Base  Rent  that  was  previously  abated  pursuant  to  this  paragraph;  provided,  however,  Tenant
acknowledges and agrees that nothing in this subparagraph is intended to limit any other remedies
available to Landlord at law or in equity under applicable law (including, without limitation, the
remedies  under  Civil  Code  Section  1951.2  and/or  1951.4  and  any  successor  statutes  or  similar
laws), in the event Tenant defaults under the Lease beyond any applicable notice and cure period.

Fifth Amendment to Lease

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MONROVIA, CA
[Xencor]

4.

Condition  of  the  2nd  Floor  Premises.  Tenant  is  in  possession  of  the  2nd  Floor
Premises  and,  except  as  otherwise  provided  in  the  Lease  or  this  Amendment,  shall  continue  to
occupy  the  same  in  its  current  “AS  IS”  condition  without  any  agreements,  representations,
understandings or obligations on the part of Landlord to perform or pay for any alterations, repairs
or  improvements  other  than  as  specifically  provided  in  the  Lease  or  this  Amendment.    Tenant
further  acknowledges  that  except  as  expressly  provided  in  the  Lease,  neither  Landlord  nor  any
agent of Landlord has made any representation or warranty regarding the condition of the Second
Floor  Premises,  the  improvements,  refurbishments,  or  alterations  therein,  or  with  respect  to  the
functionality thereof or the suitability of any of the foregoing for the conduct of Tenant’s business
and that all representations and warranties of Landlord, if any, are as set forth in the Lease.

5.

Condition of 2nd Floor Premises.  

in 

(a) Tenant  acknowledges  that  it  has  been  occupying  the  2nd  Floor  Premises  and,
except  as  otherwise  provided  in  the  Lease  or  this  Amendment,  Tenant  accepts  the  2nd  Floor
representations,
its  current  “AS-IS”  condition  without  any  agreements, 
Premises 
understandings or obligations on the part of Landlord to perform or pay for any alterations, repairs
or  improvements  except  as  provided  in  the  Lease.    Tenant  further  acknowledges  that  except  as
expressly provided in the Lease and this Amendment, neither Landlord nor any agent of Landlord
has made any representation or warranty regarding the condition of the Second Floor Premises,
the  improvements,  refurbishments,  or  alterations  therein,  or  with  respect  to  the  functionality
thereof or the suitability of any of the foregoing for the conduct of Tenant’s business and that all
representations  and  warranties  of  Landlord,  if  any,  are  as  set  forth  in  the  Lease  and  this
Amendment.    Please  be  advised  that  the  Building  and  the  Second  Floor  Premises  have  not
undergone  inspection  by  a  Certified  Access  Specialist  (CASp).    The  foregoing  verification  is
included  in  this  Amendment  solely  for  the  purpose  of  complying  with  California  Civil  Code
Section  1938  and  shall  not  in  any  manner  affect  Landlord's  and  Tenant's  respective
responsibilities for compliance with construction-related accessibility standards as provided under
the Lease.  Tenant hereby waives any and all rights under and benefits of California Civil Code
Section  1938  and  acknowledges  that  the  Premises,  the  Building  and  the  Project  have  not
undergone inspection by a CASp.

6.

Option  to  Extend  2nd  Floor  Space  Term.    Landlord  hereby  grants  Tenant  or
Permitted Transferee one option to extend the 2nd Floor Space Term (the “Option to Extend”) for
one (1) additional period of five (5) years (the “2nd Floor Space Option Term”), in accordance
with  the  terms  of  this  Amendment  and  the  Lease,  except  that  (a)  the  option  contained  in  this
Section 6 shall be exercised by Tenant, if at all, by Tenant providing written notice to Landlord not
more than three hundred sixty (360) days and not less than two hundred and seventy (270) days
prior  to  the  expiration  of  the  2nd  Floor  Space  Term  and  (b)  the  monthly  Base  Rent  payable  by
Tenant for the 2nd Floor Premises during the Option Term (the “Option Rent”) shall be the “Fair
Market Rental Value” for the 2nd Floor Premises but not less than 103% of the annual Base Rent
payable by Tenant for the 2nd Floor Premises during the last year of the 2nd Floor Space Term.
 Upon the proper exercise of the Option to Extend, the 2nd Floor Space Term shall be extended for
the 2nd Floor Space Option Term.  All other terms and conditions of the Lease, shall apply to the
Second Floor Premises throughout the 2nd Floor Space Option Term.

Fifth Amendment to Lease

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MONROVIA, CA
[Xencor]

7.

Security Deposit.  Landlord currently holds Tenant’s Security Deposit, pursuant to
Section 9 of the Original Lease and Section 13 of the Second Amendment, in the amount of One
Hundred Thousand Eight Hundred Fifty-One and 80/100 Dollars ($100,851.80).  In addition, the
Lease is hereby amended  such  that  Landlord’s  rights  with  respect  to  use  of  the Security Deposit
shall only apply in the case of an occurrence (and for the duration) of a Tenant Event of Default, or
at  the  end  of  the  Lease  term,  if  (and  to  the  extent)  Tenant  does  not  perform,  after  written  notice
from Landlord, its then effective obligations for repair and restoration of the Premises.

8.

Clarification of the Lease

Notwithstanding  any  provision  of  the  Lease  or  this  Amendment  to  the  contrary,  the

provisions of the Lease are hereby clarified, amended and modified as follows:

Tenant  acknowledges  that  it  currently  is  leasing  One  Hundred  Percent  (100%)  of  the
rentable square footage in the Building, comprising approximately 48,225 rentable square feet, i.e.,
the entirety of the 2nd Floor and the entirety of the 3rd Floor.  Tenant agrees that as long as it is
leasing  the  entire  Building,  Tenant  shall  be  responsible  for  100%  of  its  Proportionate  Share  of
Operating  Expenses  each  year  in  excess  of  Base  Year  Operating  Expenses  for  each  applicable
portion of the Premises.  Commencing on the 2nd Floor Commencement Date, the Base Year for
Operating Expenses for the 2nd Floor Premises shall be adjusted to be the 2020 calendar year.

From and after the 2nd  Floor Commencement Date, as long as Tenant is leasing the entire
Building, under the Lease, but subject to Section 9(a) below, Tenant shall be solely responsible at
Tenant’s sole cost and expense for the repair and maintenance (but not replacement and in the case
of the elevators, replacement or capital repair) as set forth below of the following:

(a)

The two (2) existing HVAC units servicing the Building, the HVAC package

units servicing the Premises, and the two (2) existing boilers servicing the Building;

(b)

(c)

Areas, and

The gate serving the parking garage for the Building;

Trash  removal,  landscaping,  sweeping  and  maintenance  of  the  Common

The  elevators  serving  the  Building  (the  areas  and  items  described  in  the
foregoing subparagraphs (a), (b), (c) and (d) are referred to herein as “Special Areas and Items”).

(d)

9.

Additional Clarifications of the Lease

The following provisions of the Lease are hereby further clarified, amended and modified

as follows:

(a) Paragraph 10 of the Second Amendment, which modified the definition of the
“Building Systems” in Section 12.1.1 of the Original Lease, shall be deleted in its entirety, and the
definition of the “Building  Systems”  set  forth  in  Section  12.1.1  of  the  Original Lease is hereby
amended  to  exclude  “elevators”;  provided  however,  that  notwithstanding  the  foregoing  or  any
other provision of this Lease (as amended) to the contrary, subject to Section 9(i) below, Landlord

Fifth Amendment to Lease

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MONROVIA, CA
[Xencor]

shall  be  solely  responsible  for,  and  shall  bear  the  cost  of,  any  capital  item  or  replacement  or
capital work required by the Lease.

(b) Section 4.4: Holding Over.  During any holding over by Tenant in a portion of
the  Premises  (the  Second  Floor  Premises  or  Third  Floor  Premises  as  applicable)  following  the
expiration  of  the  Lease  Term  as  to  such  portion  of  the  Premises  up  to  a  maximum  of  120-days
Tenant shall be a month to month tenant only (“120-Day Holdover Period”) as to such portion of
the Premises, subject to the below additional terms and conditions.  Any such holdover rent as to
such  portion  of  the  Premises  for  such  maximum  time  period  shall  be  prorated  on  a  daily  basis
based on the number of days of actual holdover as to such portion of the Premises.  During such
holdover, Base Rent shall be as specified in Section 4.4 of the Original Lease.  Notwithstanding
any  other  provision  of  the  Lease  to  the  contrary,  in  the  event  that  Landlord  obtains  a  fully
executed Letter of Intent (“LOI”) with a replacement Tenant for occupancy of any portion of such
portion of the Premises calling for delivery of possession of such portion of the Premises to such
replacement tenant following expiration of the Lease term as to such portion of the Premises, and
in the further event that Tenant holds over as to such portion of the Premises after the expiration
of  the  Lease  term  as  to  such  portion  of  the  Premises,  then  Landlord  may  provide  notice  to  the
Tenant of the signed LOI, and Tenant shall vacate the as to such portion of the Premises within
30-days of the notice.

(c) (Omitted).

(d) Section  7.4:  Landlord’s  Records.   As  to  Section  7.4,  the  reference  to  “ninety
(90)  days”  shall  be  replaced  by  “one  hundred  eighty  (180)  days”,  the  phrase  “two  (2)  business
days” shall be revised to be “five (5) business days”, and the references to “ten percent (10%)”
shall be replaced by “five percent (5%)”.

(e) Section 10.1: Permitted Use.  The language of the last sentence of Section 10

reading “all Hazardous Substances” shall be revised to read “all such Hazardous Substances.”

(f) Section 10.3: Compliance with Laws.    Notwithstanding  any  provision  of  this
Amendment  or  the  Lease  to  the  contrary,  Section  10.3  of  the  Lease  shall  continue  to  apply  as
written, and shall prevail over any other provision in the event of conflict.

(g) Section  11:  As-Is.    The  provisions  of  Section  11  and  Sections  of  this
Amendment shall not affect or limit Landlord’s specific obligations (including without limitation,
obligations  for  repair,  rebuilding  and  compliance  with  law)  as  to  the  Premises  under  the  Lease,
and the waiver of Claims set forth in Section 11 shall only apply to Tenant’s known Claims as of
the date of this Amendment.

(h) Section 12.1.1:  The provision in the last sentence of Section 12.1.1 shall only
apply  to  damage  or  conditions  caused  by  Tenant,  its  employees,  contractors,  representatives,  or
their negligence or misconduct or that of any Tenant Permitted User (and then only to the extent
such damage or conditions is not subject to Sections 13.5 or Section 14), and Landlord represents
that it has no knowledge as of the date of execution of this Amendment of any such damage or
conditions (or any condition which requires repair or correction by Tenant under Section 12.2.1).

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(i) Sections 12.1.2 and 12.2.2: As to the two (2) existing HVAC units servicing the
Building, the HVAC package units servicing the Premises, and the boilers servicing the Building,
Tenant shall be obligated to maintain and repair the same, subject to reasonable wear and tear, but
in the case where any such unit or boiler needs replacement, Landlord shall bear the entire cost of
such replacement, other than the portion of the amortized cost thereof to be borne by Tenant as
provided  in  Paragraph  6)  of  Exhibit  E  to  the  Lease,  and  within  30  days  of  execution  of  this
Amendment, Tenant shall provide Landlord with Tenant’s signed contract for HVAC servicing of
the foregoing HVAC units serving the Premises and the Building.  For purposes of this Lease, in
the  case  of  the  capital  repair  of  the  elevators,  any  capital  repair  the  aggregate  cost  of  which
exceeds $6,000 shall be considered a replacement and the cost thereof shall be borne by Landlord,
which  replacement  cost  shall  be  amortized  and  borne  by  Tenant  as  provided  in  Paragraph  6  of
Exhibit E to the Lease.

(j) (Intentionally Omitted)

(k) Section  12.4:  Alterations;  Tenant  Removal  of  Alterations.    Tenant  shall  not
have the obligation to remove Alterations made prior to the Effective Date of this Amendment,
and no future Alteration shall be required to be so removed unless such Alteration would make
the Premises materially less marketable to new tenants in comparison to conditions in effect prior
to such Alteration, as determined in Landlord’s good faith discretion.

(l) (Intentionally omitted)

(m) Section 14:  Damage or Destruction.

i)

If  the  Lease  is  not  terminated  by  Landlord  or  Tenant  pursuant  to
Section 14, (i) Tenant shall restore, and shall be solely responsible for any deficiency (or shortfall)
in insurance proceeds allocable to restoration of, the tenant improvements in the Premises and the
personal property of Tenant (provided that Tenant may make reasonable modifications to the scope
and nature of such repairs and restoration of Tenant improvements in the Premises) without regard
to  any  fault  or  negligence  of  Landlord,  and  (ii)  if,  following  any  casualty,  Landlord  shall  fail  to
promptly  restore  fully  the  remaining  improvements  on  the  Property  (i.e.,  those  improvements
which are not Tenant improvements), (without regard to any fault or negligence of Tenant or any
Tenant  Permitted  User)  without  cost  to  Tenant;  Tenant  may,  by  delivery  of  written  notice  to
Landlord terminate this Lease without liability, effective on the date specified in its notice.

ii)

In the event of any damage to the Premises or Property by a casualty
event  which  renders  all  or  any  portion  of  the  Premises  uninhabitable  (and  this  Lease  is  not
terminated by Landlord or Tenant), and Tenant does not so occupy such portion of the Premises, all
rent  payable  under  the  Lease  allocable  to  such  portion  of  the  Premises  shall  be  abated  from  the
date  such  portion  is  not  so  occupied  for  a  period  of  time  reasonably  sufficient  (under  the
circumstances) to allow Tenant to restore the tenant improvements in the Premises to a habitable
condition and reoccupy the Premises for the conduct of business.

(n) (Intentionally Omitted)

(o) Section 16: Tenant Permitted Transferees and Permitted Transfers.

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As  to  Section  16.1.2,  the  same  shall  not  apply  to  any  Permitted
Transfer  and  after  the  phrase  “Tenant  Permitted  User,”  add  the  phrase  “or  Permitted  Transferee
(defined below).”

i)

ii)

As to Section 16.1.2(a), any such merger described therein shall be
subject  to  Section  16.5  of  the  Lease  so  long  as  such  transaction  is  a  good  faith  transaction;  in
addition,  the  phrase  “or  in  which  Tenant  survives  as  a  subsidiary  of  another  person”  shall  be
deleted.

of Tenant is listed on any securities exchange or is otherwise publicly held.

iii)

As to Section 16.1.2, clauses (b) and (c) shall not apply if the stock

shall be required to assume or be liable for the obligations of Tenant under the Lease.

iv)

As  to  Section  16  generally,  no  sublessee  in  any  sublease  Transfer

v)

As to Section 16.5(a), clause (i) shall be revised to read in its entirety
“no later than ten (10) days after the closing of such Permitted Transfer, Tenant notifies Landlord
of  such  Permitted  Transfer  and  delivers  to  Landlord  reasonable  evidence  that  the  transaction  in
question complies with the requirements of this Section 16.5 and (b) clause (iii) shall be revised to
read  in  its  entirety,  “Such  Permitted  Transferee  shall  have  a  tangible  net  worth  sufficient  to
demonstrate that it is financially capable to fully service its financial obligations (including but not
limited to its obligations under the Lease) as the same become due.”

(p) Section 17.1: Defaults.

Section 17.1.1 shall be revised to read: “The failure of Tenant to cure
in full any delinquent payment of Base Rent or Additional Rent within five (5) days of receipt of
written notice from Landlord that such amount is delinquent.”

i)

ii)

Section 17.1.7 shall be deleted.

(q) Section  17.4  Late  Charges.  The  reference  in  Section  17.4  to  “ten  percent
(10%)”  shall  be  revised  to  read  “five  percent  (5%)”,  and  no  late  charge  shall  be  payable  unless
Landlord shall provide written notice of the delinquent payment in question and Tenant shall fail
to cure such delinquent rent within three (3) business days of receipt of such notice; in addition,
the last sentence of Section 17.4 shall be deleted.

(r) Section 18: Indemnification.

i)

The  provisions  of  Section  18.1  commencing  with  clause  (b)  and
continuing  for  the  remainder  of  Section  18.1  shall  be  deleted  and  replaced  with  the  following:
 “and (b) subject to the provisions of Sections 12.1 and 14, any accident, injury or damage which
happens  at,  in  or  upon  the  Premises  during  the  Term;  (c)  any  activity,  work  or  thing  done,
permitted or suffered by Tenant or any Tenant Permitted Used on, in or about the Premises, (d) any
failure  by  Tenant  to  comply  with  any  Laws,  including,  without  limitation,  any  Laws  related  to
ADA or other Laws relating to accessibility to the Premises; any other act, omission, and (f) the
negligence  or  willful  misconduct  of  Tenant  or  any  member,  manager,  partner,  officer,  director,
employee  or  contractor  of  Tenant,  or  any  Tenant  Permitted  User  (collectively,  “Tenant  Parties”)
relating to the

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Premises or Tenant's operations therein, except to the extent any of the foregoing arises as a result
of  the  gross  negligence  or  willful  misconduct  or  failure  to  comply  with  Landlord's  obligations
under  this  Lease  of  Landlord  or  any  member,  manager,  partner,  officer,  director,  employee  or
contractor of Landlord (collectively, “Landlord Parties”).”

ii)

(Intentionally Omitted)

(s) Section  20.1  No  Landlord  Liability.    Section  20.1  (c)  shall  not  apply  in  the
event and to the extent of the gross negligence or willful misconduct of Landlord or any Landlord
Party, and Section 20.1(d) shall not apply to the extent such injury or damages are caused by the
intentional misconduct of Landlord or any Landlord Party.

(t) Section 21: Subordination.  Landlord shall use reasonable efforts to cause the
current Mortgagee, JP Morgan Chase Bank N.A. (“Chase”) to execute, acknowledge and deliver
to  Tenant  within  90  days  of  the  date  of  full  execution  of  this  Amendment  a  Subordination
Nondisturbance  and  Attornment  Agreement  in  the  form  of  Exhibit  A  attached  hereto  (the
“SNDA”)  in  favor  of  Tenant  provided  that  if  Landlord  shall  not  deliver  to  Tenant  such  SNDA
fully executed by Chase and Landlord within such 90 day period, and Landlord shall continue to
fail to do so for an additional 30 days after Tenant delivers a notice of such failure to Landlord,
Tenant  may  at  any  time  within  thirty  (30)  days  thereafter  elect  to  terminate  this  Lease  and  its
obligations hereunder (without further liability).

(u) Section 27: Surrender of Premises. The phrase “subject to all Alterations” shall
be  added  immediately  following  the  language  in  Section  27  reading  “in  the  same  condition  as
received,”  and  the  phrase  “in  good  operating  condition”  shall  be  revised  to  read  “in  good
operating  condition,  reasonable  wear  and  tear  excepted.”    The  proviso  contained  in  the  first
sentence  of  Section  27  shall  be  deleted,  and  the  right  of  Landlord  to  require  the  removal  of
Alterations shall be subject to Section 7(i) of this Amendment.

(v) Section 28.3: Notices.  In Section 28.3, the phrase “by United States registered

or certified mail” shall be deleted.

(w) Section 28.4: Waivers.  In any case under the Lease where an action, omission
or  right  of  a  party  hereto  is  subject  to  the  consent  of  the  other  party  hereto,  and  no  standard  is
provided  in  the  Lease  for  the  giving  or  withholding  of  such  consent,  such  consent  shall  not  be
unreasonably withheld, conditioned or delayed.

(x) Section  32.1:  Affiliate.    In  Section  32.1,  all  references  to  “fifty-one  percent
(51%)” shall be replaced with the phrase “thirty percent (30%)” (provided that in determining an
Affiliate Sublease, it shall be “twenty percent (20%)”).

(y) Exhibit  E:  Operating  Costs  for  any  Expense  Year  shall  not  include  insurance

deductibles or shortfalls aggregating more than $25,000 for such year.

(z)

If  Tenant  no  longer  leases  100%  of  the  Building,  (i)  “Tenant’s  Proportionate
Share”  shall  equal  the  percentage  corresponding  to  the  fraction,  the  numerator  of  which  is  the
rentable area of the Premises and the denominator of which is the rentable area of the Building, (ii)
Tenant shall be entitled to exclusive use of Tenant’s  Proportionate Share of all parking spaces

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contained on the Property, and (iii) Tenant shall pay for all electricity provided to the Premises and
Tenant’s  Proportionate  Share  of  all  electricity  provided  to  the  Common  Areas  (but  not  for  more
than the foregoing).

10.

No Brokers.  Landlord and Tenant hereby warrant to each other that they shall have
no  obligation  to  provide  a  commission  to  any  real  estate  broker  or  agent  in  connection  with  the
negotiation of this Amendment. Each party agrees to indemnify and defend the other party against
and  hold  the  other  party  harmless  from  any  and  all  claims,  demands,  losses,  liabilities,  lawsuits,
judgments, and costs and expenses (including, without limitation, reasonable attorneys' fees) with
respect to any leasing commission or equivalent compensation alleged to be owing on account of
any dealings with any real estate broker or agent occurring by, through our under the indemnifying
party.

11.

Authorization.    Landlord  and  Tenant  represent  and  warrant  to  each  other
respectively that they have the requisite power and authority to enter into this Amendment; that all
necessary and appropriate approvals, authorizations and other steps have been taken to effect the
legality of this Amendment; that the signatories executing this Amendment on behalf of Landlord
and  Tenant  have  been  duly  authorized  and  empowered  to  execute  this  Amendment  on  behalf  of
Landlord and Tenant, respectively; and that this Amendment is valid and shall be binding upon and
enforceable  against  Landlord  and  Tenant  and  their  respective  successors  and  assigns  and  shall
inure to the benefit of Landlord and Tenant, and their respective successors and assigns.

12.

Full Force and Effect.  Except as set forth herein, all of the terms, covenants, and
conditions of the Lease shall remain in full force and effect and there exists as of the date hereof no
default or breach by Tenant of (or to Landlord’s knowledge the occurrence of an event which, with
the passage of time or the giving of notice or either of them would constitute a default or breach by
Tenant of) any of the terms or conditions of, or obligations of Tenant under the Lease.  If a conflict
or  inconsistency  exists  between  the  terms  and  provisions  of  this  Amendment  and  the  terms  and
provisions of the Lease, the terms and provisions of this Amendment shall control to the extent of
any such conflict or inconsistency.

13.

Submission. Submission of this Amendment by Landlord to Tenant for examination
and/or execution shall not in any manner bind Landlord and no obligations on Landlord shall arise
under this Amendment unless and until this Amendment is fully signed and delivered by Landlord
and  Tenant;  provided,  however,  the  execution  and  delivery  by  Tenant  of  this  Amendment  to
Landlord  shall  constitute  an  irrevocable  offer  by  Tenant  of  the  terms  and  conditions  herein
contained, which offer may not be revoked for thirty (30) days after such delivery.

14.

Counterparts;  Electronic  Signatures.    This  Amendment  may  be  executed  in  any
number  of  counterparts,  all  of  which  shall  be  deemed  an  original,  but  such  counterparts,  when
taken together, shall constitute one agreement.  The parties hereto may deliver their signatures to
this Amendment by facsimile, electronic mail, or other electronic transmission, and agree to accept
such digital image of this Amendment, as executed, as a true and correct original and admissible as
if such signatures were original executed versions of this Amendment.  In the event a signature is
transmitted  electronically,  the  party  so  transmitting  shall  deliver  original  signature  pages  within
three (3) business days thereafter.

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[SIGNATURES APPEAR ON THE FOLLOWING PAGE]

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IN  WITNESS  WHEREOF,  this  Fifth  Amendment  to  Lease  has  been  executed  as  of  the

Effective Date.

“Landlord”

“Tenant”

111 LEMON INVESTORS LLC,
a California limited liability company

By: Robhana LV1 LLC,

a Nevada limited liability company
Its Member

By: /s/ Robert Hanasab
Robert Hanasab
Its Manager

XENCOR, INC.,
a Delaware corporation

By: /s/ John Kuch

Printed Name: John Kuch
Its: Senior Vice President and CFO

Fifth Amendment to Lease

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[Xencor]

 
 
 
 
 
 
Exhibit A

Subordination Nondisturbance and Attornment Agreement

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[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Exhibit 10.34

COLLABORATION AND LICENSE AGREEMENT

BY AND BETWEEN

XENCOR, INC.

AND

JANSSEN BIOTECH, INC.

Dated December 4, 2020

Table of Contents

ARTICLE 1 DEFINITIONS

ARTICLE 2 GOVERNANCE

2.1

2.2

2.3

Joint Research Committee.

Joint Development Committee.

Joint Finance Committee.

2.4 Meetings and Minutes.

2.5 Decision-Making.
2.6

Subcommittees.

2.7 Alliance Managers.

ARTICLE 3 RESEARCH

3.1 Overview.

3.2 Research Plan.

3.3 Conduct of Research Program Activities.

3.4 Binding Domains.

3.5 Research Program Costs.

3.6 Records; Reports.

3.7 Candidate Selection.

3.8 Materials.

ARTICLE 4 DEVELOPMENT, MANUFACTURE AND COMMERCIALIZATION

4.1 General.

4.2 Xencor Assistance.

4.3 Diligence.

4.4 Conduct of Activities.

ARTICLE 5 PROSTATE COMBINATION REGIMEN STUDIES

5.1 Definitions.

5.2

Prostate Combination Regimen Study Proposals.

5.3 Conduct of Permitted Prostate Combination Regimen Studies.

ARTICLE 6 XENCOR OPTION RIGHTS

6.1 General.

6.2 Co-Funding Option.

i

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6.3 Co-Detailing Option.

ARTICLE 7 FINANCIAL PROVISIONS

7.1 Upfront Payment.

7.2 Development and Regulatory Milestones.

7.3

Sales Milestones.

7.4 Royalties.

7.5

Payment Terms.

7.6 Records; Audits.

7.7 Taxes.

ARTICLE 8 LICENSE GRANTS; EXCLUSIVITY

8.1 Grants.

8.2

Sublicensing.

8.3 No Implied Licenses.

8.4 Exclusivity.

ARTICLE 9 INTELLECTUAL PROPERTY

9.1

9.2

9.3

9.4

9.5

Patent Representatives.

Inventions.

Prosecution of Patents.

Patent Enforcement.

Patent Term Extensions.

9.6 Regulatory Data Protection.

9.7

Patent Invalidity Claims.

9.8 Claimed Infringement.

9.9 Acquirer Intellectual Property.

9.10 Trademarks.

ARTICLE 10 CONFIDENTIALITY AND PUBLICITY

10.1 Non-Disclosure and Non-Use.
10.2 Exceptions.

10.3 Authorized Disclosure.

10.4 Terms of Agreement.

10.5 Publicity.

10.6 Prior Non-Disclosure Agreement.

10.7 Equitable Relief.

10.8 Publications.

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ARTICLE 11 REPRESENTATIONS AND WARRANTIES; CERTAIN COVENANTS

11.1 Representations of Authority.

11.2 Consents.

11.3 No Conflict.

11.4 Enforceability.

11.5 Additional Representations and Warranties of Xencor.

11.6 No Warranties.

11.7 No Debarment or Exclusion.

11.8 Compliance with Anti-Corruption Laws.

11.9 Additional Third Party Technology.

11.10

[***]

ARTICLE 12 INDEMNIFICATION; INSURANCE

12.1 Indemnification by Janssen.
12.2 Indemnification by Xencor.

12.3 Indemnification Procedures.

12.4 Insurance.

ARTICLE 13 TERM AND TERMINATION

13.1 Term.

13.2 Termination for Material Breach.

13.3 Termination by Janssen Without Cause.

13.4 Termination if No Candidate Selection.

13.5 Provisions for Insolvency.

13.6 Effects of Termination or Expiration.

ARTICLE 14 EFFORTS TO OBTAIN CLEARANCES

14.1 Commercially Reasonable Efforts.

14.2 Antitrust Filing.

ARTICLE 15 DISPUTE RESOLUTION

15.1 Exclusive Dispute Resolution Mechanism.

15.2 Referral to Executive Officers.

15.3 Mediation.
15.4 Arbitration.

15.5 Waiver.

ARTICLE 16 MISCELLANEOUS

16.1 Assignment; Successors.

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16.2 Performance by Affiliates.
16.3 Subcontracting.

16.4 No Consequential or Punitive Damages.

16.5 Choice of Law.
16.6 Submission to Jurisdiction.

16.7 Notices.

16.8 Severability.

16.9 Captions.

16.10

Further Actions.

16.11 Amendment; No Waiver.

16.12

16.13

16.14

Integration.

Independent Contractors; No Agency.

Force Majeure.

16.15 Counterparts; Signatures.

16.16 Construction.

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COLLABORATION AND LICENSE AGREEMENT

This  Collaboration  and  License  Agreement  (the  “Agreement”)  is  made  and  effective  as  of
December 4, 2020 (the “Execution Date”) by and between Xencor, Inc., a Delaware corporation
(“Xencor”), on the one hand, and Janssen Biotech, Inc., a Pennsylvania company (“Janssen”), on
the  other  hand.    Xencor  and  Janssen  are  referred  to  herein  each  individually  as  a  “Party”  and
collectively as the “Parties.”

INTRODUCTION

WHEREAS,  Xencor  is  engaged  in  the  research  of  pharmaceutical  products  and  controls
certain  patents,  know-how  and  other  rights  related  to  the  Licensed  Antibodies  and  Licensed
Products (as defined below);

WHEREAS,  Janssen  has  considerable  knowledge  and  experience  in  developing  and

commercializing products in the oncology field throughout the world;

WHEREAS,  the  Parties  believe  that  a  collaboration  arrangement  between  the  Parties
regarding the research of the Licensed Antibodies would be desirable and Xencor desires to grant
to Janssen, and Janssen desires to obtain from Xencor, an exclusive, worldwide license to develop,
manufacture and commercialize Licensed Antibodies and Licensed Products; and

WHEREAS,  the  Parties  therefore  desire  to  provide  for  such  research  collaboration  and

license on and subject to the terms and conditions set forth herein.

NOW,  THEREFORE,  for  and  in  consideration  of  the  mutual  covenants  contained  herein,  the
Parties agree as follows:

ARTICLE 1
DEFINITIONS

“Acquirer”  means  any  Third  Party  that  is  a  counterparty  in  any  Change  of  Control

1.1
transaction and any of such Third Party’s Affiliates.

“Action” means any claim, action, cause of action or suit (whether in contract or tort or
1.2
otherwise),  litigation  (whether  at  law  or  in  equity,  whether  civil  or  criminal),  controversy,
assessment,  arbitration,  investigation,  hearing,  charge,  complaint,  demand,  notice  or  proceeding
of, to, from, by or before any Governmental Authority.

1.3
“Affiliate”  means,  with  respect  to  a  Person,  any  other  Person  directly  or  indirectly
controlling, controlled by, or under common control with, such first Person at any time for so long
as such Person controls, is controlled by or is under common control with such first Person.  For
purposes  of  this  definition,  the  term  “control”  (including  the  correlative  meanings  of  the  terms
“controlled by” and “under common control with”), as used with respect to any Person, means (a)
in the case of a Person that is a corporate entity, direct or indirect ownership of 50% or more of
the stock or shares having the right to vote for the election of directors and (b) in the case of a
Person that is an entity, but is not a corporate entity, the possession, directly or indirectly, of the
power to direct or cause the direction of the management policies of such Person, whether through
the ownership of voting securities, or by contract, or otherwise.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

1

1.4

1.5

“Antibody” means [***].

“Bispecific” in reference to an Antibody means [***].

1.6
“Binding Domain” means the region of an Antibody that binds to the antigen targeted by
such Antibody (or if such Antibody is multivalent, binds to one of the epitopes targeted by such
Antibody) [***].

“Business Day” means a day on which banking institutions in New York, New York are

1.7
open for business.

“Calendar  Quarter”  means  a  quarter  based  on  the  Johnson  &  Johnson  Universal

1.8
Calendar for that quarter (a copy of which is attached hereto as Exhibit 1.8).

“Calendar Year” means a year based on the Johnson & Johnson Universal Calendar for

1.9
that year (a copy of which is attached hereto as Exhibit 1.8).

1.10

“CD28 Binding Domain” means a Binding Domain which binds any epitope of CD28.

“Change  of  Control”  means,  at  any  time  on  or  after  the  date  of  this  Agreement,  with

1.11
respect to Xencor (and any of its successors):

(a)

the  acquisition,  directly  or  indirectly,  by  any  individual,  entity  or
group  (within  the  meaning  of  Section  13(d)(3)  or  14(d)(2)  of  the  Exchange  Act)  (a  “Specified
Person”), of Beneficial Ownership of 50% or more of either (i) the then outstanding ordinary (or
common)  shares  of  such  company  (the  “Outstanding  Common  Stock”)  or  (ii)  the  combined
voting power of the then outstanding voting securities of such company entitled to vote generally
in  the  election  of  directors  (the  “Outstanding Voting Securities”);  provided,  however,  that  for
purposes  of  this  subclause  (a),  any  acquisition  of  securities  of  such  company  by  any  Person
pursuant to a transaction which complies with clauses (i) and (ii) of subclause (c) of this definition
will not constitute a Change of Control of such company;

(b)

individuals  who,  as  of  the  date  hereof,  constitute  the  Board  of
Directors of such company (the “Incumbent Board”) cease for any reason to constitute at least a
majority  of  the  Board  of  Directors  of  such  company;  provided,  however,  that  any  individual
becoming a director subsequent to the date hereof whose election, or nomination for election by
such company’s shareholders, was approved by a vote of at least a majority of the directors then
comprising the Incumbent Board will be considered as though such individual were a member of
the  Incumbent  Board,  but  excluding,  for  this  purpose,  any  such  individual  whose  initial
assumption of office occurs as a result of an actual or threatened election contest with respect to
the election or removal of directors or other actual or threatened solicitation of proxies or consents
by or on behalf of any Person other than the Board of Directors of such company;

consummation  of  a  merger,  consolidation,  or  other  similar
extraordinary transaction, or sale or other disposition of all or substantially all of the assets (any
of the foregoing, a “Business Combination”) of such company, in each case, unless,

(c)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

2

immediately following such Business Combination, (i) the individuals and entities who were the
Beneficial  Owners,  respectively,  of  the  Outstanding  Common  Stock  and  Outstanding  Voting
Securities  immediately  prior  to  such  Business  Combination  beneficially  own,  directly  or
indirectly, more than 50% of, respectively, the then outstanding shares of common stock and the
combined voting power of the then outstanding voting securities entitled to vote generally in the
election  of  directors,  as  the  case  may  be,  of  the  corporation  or  other  entity  resulting  from  such
Business  Combination  (including  a  corporation  which  as  a  result  of  such  transaction  owns  the
then outstanding securities of such company or all or substantially all of such company’s assets
either directly or through one or more subsidiaries) in substantially the same proportions as their
ownership, immediately prior to such Business Combination, of the Outstanding Common Stock
and Outstanding Voting Securities, as the case may be, and (ii) more than 50% of the members of
the  board  of  directors  of  the  corporation  resulting  from  such  Business  Combination  were
members of the Incumbent Board at the time of the execution of the initial agreement, or of the
action of the Board of Directors of such company, providing for such Business Combination;

(d)
liquidation or dissolution of such company; or

approval  by  the  shareholders  of  such  company  of  a  complete

(e)

the  sale  or  disposition  to  a  Third  Party  of  assets  or  businesses  that
constitute  50%  or  more  of  the  total  revenue  or  assets  of  a  Party  (determined  on  a  consolidated
basis), including such Party’s assets or business related to the Licensed Antibodies and Licensed
Products.

For purposes of this definition, a Person will be deemed the “Beneficial Owner” of, and
will be deemed to “beneficially own”, and will be deemed to have “Beneficial Ownership” of,
any securities:

which  such  Person  or  any  of  such  Person’s  Affiliates  is
deemed to “beneficially own” within the meaning of Rule 13d-3 promulgated under the Exchange
Act; or

(i)

(ii)

which  such  Person  or  any  of  such  Person’s  Affiliates  has,
directly  or  indirectly:  (1)  the  right  to  acquire  (whether  such  right  is  exercisable  immediately  or
only after the passage of time) pursuant to any agreement, arrangement or understanding (written
or oral), or upon the exercise of conversion rights, exchange rights, rights, warrants or options, or
otherwise; provided, however,  that  a  Person  will  not  be  deemed  under  this  clause  (1)  to  be  the
Beneficial Owner of, or to beneficially own, or to have Beneficial Ownership of, any securities
tendered pursuant to a tender or exchange offer made by or on behalf of such Person or any of
such  Person’s  Affiliates  until  such  tendered  securities  are  accepted  for  purchase  or  exchange
thereunder or cease to be subject to withdrawal by the tendering security holder; or (2) the right to
vote or dispose of, including pursuant to any agreement, arrangement or understanding (written or
oral);  provided,  however,  that  a  Person  will  not  be  deemed  under  this  clause  (2)  to  be  the
Beneficial Owner of, or to beneficially own, or to have Beneficial Ownership of, any security if
(x) the agreement, arrangement or understanding (written or oral)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

3

to  vote  such  security  arises  solely  from  a  revocable  proxy  or  consent  given  to  such  Person  in
response to a public proxy or consent solicitation made generally to all holders of the Outstanding
Common Stock or Outstanding Voting Securities of the issuer of such security in accordance with
the applicable rules and regulations under the Exchange Act and (y) the beneficial ownership of
such security is not also then reportable on Schedule 13D or 13G under the Exchange Act (or any
comparable or successor report); or

(iii)

which  are  beneficially  owned,  directly  or  indirectly,  by  any
other Person with which such Person (or any of such Person’s Affiliates) has (1) any agreement,
arrangement  or  understanding  (written  or  oral)  for  the  purpose  of  acquiring,  holding,  voting
(except  pursuant  to  a  revocable  proxy  as  described  in  the  proviso  to  subclause  (ii)(2)  of  this
definition) or disposing of any ordinary (or common) shares or voting securities of the issuer
of such security or (2) any agreement, arrangement or understanding (written or oral) to cooperate
in obtaining, changing or influencing the control of the issuer of such security; or

(iv)

which  are  the  subject  of,  or  the  reference  securities  for,  or
that underlie, any Derivative Interest of such Person or any of such Person’s Affiliates, with the
number  of  ordinary  (or  common)  shares  or  voting  securities  deemed  Beneficially  Owned  being
the notional or other number of ordinary (or common) shares or voting securities specified in (or
determined pursuant to) the documentation evidencing the Derivative Interest as being subject to
be acquired upon the exercise or settlement of the Derivative Interest or as the basis upon which
the value or settlement amount of such Derivative Interest is to be calculated in whole or in part.

“Clinical Study”  means  any  study  in  which  human  subjects  are  dosed  or  treated  with  a

1.12
drug or biological product, whether approved or investigational.

1.13
“Combination Product” means (a) any product containing a Licensed Antibody and one
or  more  other  active  compounds  or  active  ingredients  in  a  fixed-dose  formulation,  or  (b)  any
combination  of  a  Licensed  Product  sold  together  with  another  drug  or  biological  product  in  a
single package or container for a single price.

“Combination  Regimen”  means  the  administration  of  two  or  more  drugs  or  biological
1.14
products  together  for  the  treatment,  diagnosis  or  prophylaxis  of  any  Indication,  including  a
Licensed Product and at least one other distinct drug or biological product that is not a Licensed
Product, where such Licensed Product and other drug or biological product are packaged and sold
separately.

1.15
“Commercialization”  or  “Commercialize”  means  marketing,  promoting,  detailing,
distributing,  importing,  exporting,  offering  for  sale  or  selling  a  drug  or  biological  product,
including  medical  affairs  activities  (other  than  Included  Medical  Affairs  Studies),  regulatory
activities  directed  to  obtaining  pricing  and  reimbursement  approvals,  price  calculations  and
related reporting to  Governmental  Authorities,  and  interacting  with  Regulatory Authorities with
respect to the foregoing.  Commercialization does not include any activities that are Development
activities or Manufacturing activities.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

4

Product and any country or regulatory jurisdiction, receipt of [***].

(a)

“Commercialization  Approval”  means,  with  respect  to  a  Licensed

1.16

“Commercially Reasonable Efforts” means [***].

1.17

“Committee” means the JRC, JDC, and, if Xencor exercises the Co-Funding Option, JFC.

“Consent” means,  with  respect  to  a  certain  matter,  that  Xencor  has  provided  consent  to

1.18
such matter as evidenced in a writing executed by Xencor.

“Controlled”  or  “Control”  means,  when  used  in  reference  to  Know-How,  Patents,
1.19
Confidential  Information  or  intellectual  property  rights,  the  legal  authority  or  right  (either  by
ownership or license (other than a license granted pursuant to this Agreement)) of a Party (or any
of  its  Affiliates)  to  grant  a  license  or  sublicense  of  such  Know-How,  Patents,  Confidential
Information or intellectual property rights to the other Party, or to otherwise disclose such Know-
How, Patents, Confidential Information or intellectual property rights to the other Party, without
violating or breaching the terms of any agreement with any Third Party, or misappropriating such
Know-How, Patents, Confidential Information or intellectual property rights of any Third Party,
such  Third  Party  agreement  existing  (a)  as  of  the  Execution  Date  or  (b)  subsequent  to  the
Execution Date if (in the case of this clause (b)) such Party first acquired rights to such Know-
How, Patents, Confidential Information or intellectual property rights pursuant to such agreement.
 [***].  

“Cover”, “Covering” and “Covered”  means,  with  respect  to  a  Patent  and  an  invention,
1.20
that, in the absence of ownership of or a license under such Patent, the practice of such invention
(e.g., with respect to a Patent in the U.S., the manufacture, use, sale, offer for sale or importation
of such invention) would infringe a claim of such Patent [***].  

1.21
“CPI” means the Consumer Price Index-Urban Wage Earners and Clerical Workers, U.S.
City Average, All Items, 1982-1984=100, published by the U.S. Department of Labor, Bureau of
Labor Statistics (or its successor equivalent index) in the U.S.

1.22
“Currency Hedge Rate” means the Johnson & Johnson currency hedge rate, which is the
result  of  the  effectively  performed  currency  hedging  at  Johnson  &  Johnson  for  the  upcoming
Calendar Year and will be set up once a Calendar Year and will remain constant throughout such
Calendar Year.  The Johnson & Johnson currency hedge rate is calculated as a weighted average
hedge  rate  of  the  outstanding  external  foreign  currency  forward  hedge  contracts  of  Johnson  &
Johnson with Third Party banks.

1.23

“Derivative” means [***].  

1.24
“Derivative Interest” means any derivative security (as defined under Rule 16a-1 under
the Exchange Act) that increases in value as the value of some other ordinary (or common) share
or voting security increases, including, but not limited to, a long convertible security, a long call
option and a short put option position, in each case regardless of whether (x) such

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

5

derivative security conveys any voting rights in such other ordinary (or common) share or voting
security,  (y)  such  derivative  security  is  required  to  be,  or  is  capable  of  being,  settled  through
delivery of such other ordinary (or common) share or voting security or (z) any transaction hedges
the economic effect of such derivative security.

1.25

“Development” means:

(a)

non-clinical  and  clinical  research  and  drug  development  activities
designed to generate data to support Commercialization Approval of a drug or biological product,
including  assay  development,  toxicology,  pharmacology,  data  collection  and  management,
statistical  analysis,  Clinical  Studies  (including  Included  Medical  Affairs  Studies)  and
development of companion diagnostics;

(b)

test method development and stability testing, process development,
process  validation,  process  scale-up,  formulation  development,  delivery  system  development,
quality assurance and quality control development, technology transfer and other related activities
directed  to  establishing  Manufacturing  of  a  drug  or  biological  product  (collectively,  “CMC
Development Activities”);

regulatory  activities 
Development Activities, including the preparation and submission of IND/CTAs;

relating 

(c)

to  Clinical  Studies  and  CMC

(d)

regulatory  activities  in  support  of  obtaining  and  maintaining
Marketing  Approval,  including  the  preparation  and  submission  of  Drug  Approval  Applications,
regulatory affairs, project management, drug safety surveillance and REMS programs as required
by the FDA or other Regulatory Authorities;

(e)

(f)

Early Access Programs; and

pharmacovigilance  activities  with  respect  to  a  drug  or  biological

product, including establishing, updating and maintaining of a global safety database.

Notwithstanding the foregoing, Development excludes any Research activities conducted under
the Research Program and any Commercialization activities.

1.26

“Diligent Efforts” means[***].

1.27

“DOJ” means the United States Department of Justice.

1.28
“Drug Approval Application” means: (a) a Biologics License Application submitted to
the  FDA  pursuant  to  Section  351(a)  of  the  Public  Health  Service  Act  and  the  regulations
promulgated  thereunder  (“BLA”);  (b)  an  application  for  authorization  to  market  and/or  sell  a
biological product submitted to a Regulatory Authority in any country or jurisdiction other than
the  U.S.,  including,  with  respect  to  the  European  Union,  a  marketing  authorization  application
filed  with  the  EMA  pursuant  to  the  Centralized  Approval  Procedure  or  with  the  applicable
Regulatory Authority of a country in the European Economic Area with respect to the

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

6

decentralized  procedure,  mutual  recognition  or  any  national  approval  procedure  (“MAA”);  or
(c)  with  respect  to  any  biological  product  for  which  a  BLA  or  MAA  has  been  approved  by  the
applicable  Regulatory  Authority,  an  application  to  supplement  or  amend  such  BLA  or  MAA  to
expand the approved label for such biological product to include use of such biological product
for an additional Indication (“Supplemental Application”).

“Early Access Program” or “EAP” means any program to provide patients in a country
1.29
with a Licensed Product before receipt of Marketing Approval and before First Commercial Sale
in  such  country  in  which  the  use  of  the  Licensed  Product  is  not  primarily  intended  to  obtain
information about the safety or effectiveness of such Licensed Product, including Treatment INDs
/ Protocols, Named Patient Programs and Compassionate Use programs.  For clarity, an EAP with
respect  to  a  Licensed  Product  may  continue  to  be  performed  following  receipt  of  Marketing
Approval of such Licensed Product and costs may continue to be incurred in accordance with the
performance of such EAP after Marketing Approval.

1.30
“Effective Date” means the first Business Day immediately following the date on which
the  Parties  have  actual  knowledge  that  all  applicable  waiting  periods  under  the  HSR  Act  with
respect to the transactions contemplated hereunder have expired or have been terminated.  Upon
the  request  of  either  Party,  the  Parties  will  memorialize  the  Effective  Date,  as  defined  in  the
immediately preceding sentence, in a written document for the Parties’ records.

1.31
“European Union” or “EU” means: (a) the countries of the European Economic Area, as
it  is  constituted  on  the  Execution  Date  and  as  it  may  be  modified  from  time  to  time  after  the
Execution Date; and (b) the United Kingdom.

1.32

“EMA” means the European Medicines Agency or any successor agency thereto.

1.33

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

1.34
“Exploitation” or “Exploit” means to make, have made, use, have used, offer to sell, sell,
have  sold,  import,  export  and  otherwise  practice  or  exploit,  including  to  Research,  Develop,
Manufacture and Commercialize.

“FDA” means the United States Food and Drug Administration or any successor agency

1.35
thereto.

1.36

“Field” means all diagnostic, prophylactic and therapeutic uses.

1.37
“First Commercial Sale” means, with respect to a Licensed Product in a country, the first
commercial  sale  of  such  Licensed  Product  in  such  country.    Sales  for  Clinical  Study  purposes,
Early Access Programs or similar uses will not constitute a First Commercial Sale.  In addition,
sales of a Licensed Product by and between a Party and its Affiliates, licensees and sublicensees,
or between the Parties (or their respective Affiliates, licensees or sublicensees) will not constitute
a  First  Commercial  Sale.    For  the  avoidance  of  doubt  sales  of  a  Licensed  Product  made  on  a
named patient basis will not constitute a First Commercial Sale for the purposes of this definition.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

7

1.38

“First Phase 3 Commencement Date” means [***].

1.39

“FTC” means the United States Federal Trade Commission.

1.40
“GAAP”  means  generally  accepted  accounting  principles  in  the  United  States,
consistently applied.  Unless otherwise defined or stated, financial terms will be calculated by the
accrual method under GAAP.

1.41
“Good  Clinical  Practice”  or  “GCP”  means  the  current  standards  for  clinical  trials  for
pharmaceuticals, as set forth in the applicable regulations and ICH guidance, including ICH E6,
as amended from time to time, and such standards of good clinical practice as are required by the
European  Union  and  other  organizations  and  governmental  agencies  in  countries  in  which  a
Licensed Product is intended to be tested to the extent such standards are not less stringent than
United States Good Clinical Practice.

1.42
“Good  Laboratory  Practice”  or  “GLP”  means  the  current  standards  for  laboratory
activities for pharmaceuticals, as set forth in the FDA’s Good Laboratory Practice regulations at
21 C.F.R. Part 58 or the Good Laboratory Practice principles of the Organization for Economic
Co-Operation  and  Development,  as  amended  from  time  to  time,  and  such  standards  of  good
laboratory  practice  as  are  required  by  the  European  Union  and  other  organizations  and
governmental  agencies  in  countries  in  which  a  Licensed  Product  is  intended  to  be  sold,  to  the
extent such standards are not less stringent than United States Good Laboratory Practice.

“Good Manufacturing Practice” or “GMP” means the part of quality assurance which
1.43
ensures  that  products  are  consistently  produced  and  controlled  in  accordance  with  the  quality
standards appropriate to their intended use as defined in 21 C.F.R. Parts 210 and 211, European
Directive  2003/94/EC,  Eudralex  4,  Annex  16,  and  applicable  United  States,  European  Union,
Canadian and ICH Guidance and/or regulatory requirements for a product.

1.44
“Governmental  Authority”  means  any  national,  federal,  state  or  local  government,  or
political  subdivision  thereof,  or  any  multinational  organization  or  authority  or  any  authority,
agency  or  commission  entitled  to  exercise  any  administrative,  executive,  judicial,  legislative,
police, regulatory or taxing authority or power, any court or tribunal (or any department, bureau or
division thereof), or any governmental arbitrator or arbitral body.

“Government Health Care Programs” means the Medicare program (Title XVIII of the
1.45
Social Security Act), the Medicaid program (Title XIX of the Social Security Act), TRICARE, the
Federal  Employee  Health  Benefits  Program,  and  other  foreign,  federal,  state  and  local
governmental health care plans and programs.

“HSR  Act”  means  the  Hart-Scott-Rodino  Antitrust  Improvements  Act  of  1976,  as

1.46
amended, and the rules and regulations promulgated thereunder.

“IND/CTA” means an Investigational New Drug Application filed with FDA or a similar

1.47
application filed with an applicable Regulatory Authority outside of the United States,

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

8

such as a clinical trial application or a clinical trial notification, or any other equivalent or related
regulatory submission, license or authorization.

1.48

“Indication” means [***].

1.49
“Janssen Binding Domain”  means  (a)  any  Janssen  proprietary  Target  Prostate  Antigen
Binding Domain designated and provided by Janssen to Xencor for incorporation into Licensed
Antibodies under the Research Program under Section 3.4.1, or (b) [***].

“Janssen  Research  Intellectual  Property”  means,  collectively,  the  Janssen  Research

1.50
Know-How and Janssen Research Patents.

1.51
“Janssen  Research  Know-How”  means  all  Know-How  relating  to  a  Janssen  Binding
Domain Controlled by Janssen or its Affiliates as of the Execution Date or at any time during the
Research Program Term that is necessary for the Research of any of the Licensed Antibodies.

1.52
“Janssen Research Patents” means all Patents Controlled by Janssen or its Affiliates as
of the Execution Date or at any time during the Research Program Term to the extent that such
Patents claim the composition of matter of any Janssen Binding Domain.

techniques,  procedures, 

1.53
“Know-How” means all technical, scientific and other know-how and information, trade
secrets,  knowledge,  technology,  means,  methods,  processes,  practices,  formulas,  instructions,
skills, 
technical  assistance,  designs,  drawings,  assembly
procedures,  computer  programs,  apparatuses,  specifications,  data,  results  and  other  material,
including Manufacturing procedures, test procedures, and purification and isolation techniques in
written, electronic or any other form, and all other discoveries, developments, inventions (whether
or not patented or patentable), and tangible embodiments of any of the foregoing, in each case that
is not generally known to the public.  Know-How does not include any Patents.  

ideas, 

1.54
“Law”  means  any  federal,  state,  local,  foreign  or  multinational  law,  statute,  standard,
ordinance,  code,  rule,  regulation,  resolution  or  promulgation,  or  any  order  by  any  court,
regulatory  agency  or  other  Governmental  Authority,  or  any  license,  franchise,  permit  or  similar
right  granted  under  any  of  the  foregoing,  or  any  similar  provision  having  the  force  or  effect  of
law.

1.55

“Licensed Antibody” means [***].  

1.56
“Licensed  Product”  means  any  pharmaceutical  product  in  any  form  containing  one  or
more Licensed Antibodies as an active ingredient, in any dosage form, formulation or method of
delivery.    For  clarity,  if  one  or  more  products  contains,  as  its  only  active  ingredient,  the  same
Licensed  Antibody,  all  such  products  will  be  considered  the  same  Licensed  Product  (except  for
any products that are Combination Products).

“Major  European  Countries”  means  France,  Germany,  Italy,  Spain  and  the  United

1.57
Kingdom.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

9

“Manufacturing”  or  “Manufacture”  means  activities  directed 

1.58
to  producing,
manufacturing,  processing,  filling,  finishing,  packaging,  labeling,  quality  assurance  testing  and
release, shipping and storage of a drug or biological product.

“Marketing  Approval”  means  approval  of  a  Drug  Approval  Application  by  the

1.59
applicable Regulatory Authority.

1.60

[***].

1.61

[***].

1.62

“MHLW” means the Ministry of Health, Labour and Welfare in Japan.

1.63
“Net Sales” means the gross amounts invoiced on sales of a Licensed Product by Janssen,
or any of its Affiliates or sublicensees to a Third Party purchaser in an arms-length transaction,
less the following customary and commercially reasonable deductions, determined in accordance
with GAAP and internal policies and actually taken, paid, accrued, allocated, or allowed based on
good faith estimates:

(a)
excluding commissions for commercialization;

trade,  cash  and/or  quantity  discounts,  allowances,  and  credits,

(b)

excise taxes, use taxes, tariffs, sales taxes and customs duties, and/or
other government charges imposed on the sale of Licensed Product (including VAT, but only to
the  extent  that  such  VAT  taxes  are  not  reimbursable  or  refundable),  specifically  excluding,  for
clarity, any income taxes assessed against the income arising from such sale;

(c)

compulsory  or  negotiated  payments  and  cash  rebates  or  other
expenditures  to  governmental  authorities  (or  designated  beneficiaries  thereof)  in  the  context  of
any national or local health insurance programs or similar programs; including, but not limited to,
pay-for-performance agreements, risk sharing agreements as well as government levied fees as a
result of the PPACA;

(d)

(or
rebates,  chargebacks,  administrative 
equivalent  thereof)  to  managed  health  care  organizations,  group  purchasing  organizations,
insurers,  pharmacy  benefit  managers  (or  equivalent  thereof),  specialty  pharmacy  providers,
governmental authorities, or their agencies or purchasers, reimbursers, or trade customers, as well
as  amounts  owed  to  patients  through  co-pay  assistance  cards  or  similar  forms  of  rebate  to  the
extent the latter are directly related to the prescribing of the Licensed Product;

fees,  and  discounts 

in the price and separately itemized on the invoice price;

(e)

outbound freight, shipment and insurance costs to the extent included

retroactive  price  reductions,  credits  or  allowances  actually  granted
upon  claims,  rejections  or  returns  of  Licensed  Product,  including  for  recalls  or  damaged  or
expired  goods, billing errors and reserves for returns;

(f)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

10

its Affiliates, including bad debts; and

(g)

any invoiced amounts which are not collected by the selling party or

significantly after invoice issuance.

(h)

any deductions in the context of payments that are due or collected

All  aforementioned  deductions  will  only  be  allowable  to  the  extent  they  are  commercially
reasonable by Janssen and will be determined, on a country-by-country basis, as incurred in the
ordinary  course  of  business  in  type  and  amount  verifiable  based  on  Janssen’s  and  Affiliates’
reporting  system.   All  such  discounts,  allowances,  credits,  rebates,  and  other  deductions  will  be
fairly and equitably allocated to Licensed Product and other products of Janssen and its Affiliates
and  sublicensees  such  that  Licensed  Product  does  not  bear  a  disproportionate  portion  of  such
deductions.

Sales  of  Licensed  Product  by  and  between  Janssen  and  its  Affiliates  and  sublicensees,  in  each
case, unless the Affiliate, sublicensee, or Party is the end purchaser, are not sales to Third Parties
and will be excluded from Net Sales calculations for all purposes; provided, however, that if such
Licensed Product is subsequently resold to a Third-Party end user such resale shall be included in
the determination of Net Sales.

Sales  of  Licensed  Product  for  the  use  in  conducting  Clinical  Studies  of  Licensed  Product
(including  Included  Medical  Affairs  Studies)  in  a  country  at  or  below  cost,  or  in  a  ‘cost-plus  a
percentage’ scenario where the ‘percentage’ covers Janssen’s tax considerations, and in order to
obtain the regulatory approval of the Licensed Product in such country will be excluded from Net
Sales calculations for all purposes.

Compassionate use and “named patient sales” will be excluded from Net Sales calculations for all
purposes.

Any disposition of the Licensed Product as free samples, donations, or patient assistance will be
excluded from Net Sales calculations for all purposes.

If  a  Licensed  Product  is  a  Combination  Product,  the  Parties  will  negotiate  in  good  faith,  at  the
latest [***] months before the expected launch of such Combination Product, an allocation of Net
Sales  of  such  Combination  Product  to  the  respective  active  pharmaceutical  ingredient  (“API”)
components,  as  the  case  may  be,  based  on  the  fair  market  value  of  such  components  for  the
purposes of determining a Licensed Product specific or licensed API specific allocated Net Sales.
Payments  related  to  such  Combination  Product  under  this  Agreement,  including  royalty
payments, will be calculated, due and payable based only on such allocated Net Sales.

Without limiting the foregoing and following negotiation, the Parties anticipate that allocated Net
Sales  will  be  calculated  according  to  one  of  the  following  paradigms,  with  the  calculation
approach in clause (i) being more preferable:

Net  Sales  for  the  determination  of  royalties  of  Combination
Products will be calculated by multiplying Net Sales of such Combination Product by the fraction
A/(A+B) where A is the average net selling price of the Licensed Product component contained in
the Combination Product, if sold separately or subject to reasonable estimation,

(i)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

11

and B is the sum of the average net selling prices of any other API components included in the
Combination Product, if sold separately or, if not sold separately, subject to reasonable estimation.

(ii)

Net  Sales  for  the  determination  of  royalties  of  Combination
Products will be calculated by multiplying Net Sales of such Combination Product by the fraction
A/C  where  A  is  the  average  net  selling  price  of  the  Licensed  Product  component  in  the
Combination Product, if sold separately or, if not sold separately, subject to reasonable estimation,
and C is the average net selling Price of the entire Combination Product.

If  the  Parties  do  not  agree  on  an  allocation  of  Net  Sales  of  such  Combination  Product  to  the
respective  API  components  or  product  components  thereof  before  launch,  then  the  calculation
approach  described  in  clause  (i)  above  will  be  used.   Where  the  foregoing  refers  to  “subject  to
reasonable estimation” such estimation shall be made by the selling Party and promptly provided
to the other Party.  If the other Party disagrees with such estimation, it shall notify the other Party
(“Component Allocation Notice”) and the JFC shall convene to reasonably determine the proper
allocation  between  the  applicable  components.    If  the  JFC  does  not  agree  on  such  allocation
within [***] days of the Component Allocation Notice, then [***].  For clarity, the selling Party
may launch such Combination Product and use its reasonable estimation of the average net selling
product  of  each  component  while  such  matter  is  being  discussed  and  until  it  is  resolved  in
accordance with this Section or Section 2.5.1.4.

1.64
“Patents” means: (a) all original (priority establishing) patent applications claiming one or
more  inventions  filed  anywhere  in  the  world,  including  provisionals  and  nonprovisionals;  and
(b) any patent or patent application that claims, or is entitled to claim, direct or indirect priority to
the patent applications described in clause (a), including any continuations, continuations-in-part,
divisions,  or  substitute  applications,  any  patents  issued  or  granted  from  any  such  patent
applications, and any reissues, reexaminations, renewals or extensions (including by virtue of any
supplementary  protection  certificates)  of  any  such  patents,  and  any  confirmation  patents  or
registration patents or patents of addition based on any such patents, and all foreign counterparts
or equivalents of any of the foregoing.

“Person” means any individual, firm, corporation, partnership, limited liability company,

1.65
trust, business trust, joint venture, governmental authority, association or other entity.

1.66
“Phase 1 Study”  means  a  Clinical  Study  of  a  Licensed  Product  as  a  monotherapy  or  in
combination  with  one  or  more  other  products,  the  principal  purpose  of  which  is  a  preliminary
determination  of  safety  in  healthy  individuals  or  patients,  as  more  fully  defined  in  21  C.F.R.  §
312.21(a), or its successor regulation, or the equivalent in any foreign country.  

1.67
“Phase 2 Study”  means  a  Clinical  Study  of  a  Licensed  Product  as  a  monotherapy  or  in
combination  with  one  or  more  other  products:  (a)  with  the  primary  endpoint  of  evaluating  its
effectiveness for a particular Indication or Indications, its short term tolerance and safety, but is
not intended to be pivotal to support Marketing Approval for such Licensed Product; or (b) that
meets the definition in 21 C.F.R. §312.21(b) or any of its foreign equivalents.  

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

12

1.68
“Phase 3 Study”  means  a  Clinical  Study  of  a  Licensed  Product  as  a  monotherapy  or  in
combination with one or more other products: (a) on a sufficient number of patients, which trial
(i) is designed to establish that such Licensed Product is safe and efficacious for its intended use
and (ii) is pivotal to support Marketing Approval for such Licensed Product; or (b) that meets the
definition in 21 C.F.R. §312.21(c) or any of its foreign equivalents.  

1.69

“PPACA” means the U.S. Patient Protection and Affordable Care Act.

1.70

[***].  

“Regulatory  Authority”  means  any  federal,  national,  multinational,  state,  provincial  or
1.71
local regulatory agency, department, bureau or other governmental entity with authority over the
marketing and sale of pharmaceutical products in a country, including FDA in the U.S. and EMA
in the EU.  Regulatory Authority also includes any non-governmental group licensed by an entity
described in the preceding sentence to perform inspections, audits and/or reviews.

1.72
“Regulatory  Exclusivity”  means  any  exclusive  marketing  rights  or  data  protection  or
other exclusivity rights conferred by any Regulatory Authority with respect to a drug or biological
product  that  prevent  (a)  such  Regulatory  Authority  from  granting  any  regulatory  approval  of  a
Third Party product that has an amino acid sequence that is the same as or substantially identical
to the amino acid sequence of such biological product; or (b) a Third Party from making a cross
reference to data held by such Regulatory Authority, including orphan drug exclusivity, pediatric
exclusivity, rights conferred in the U.S. under Section 351 of the Public Health Service Act, 42
U.S.C. §262 (such Act, the “PHSA”),  the  Drug  Price  Competition  and  Patent  Term  Restoration
Act (21 U.S.C. §355), as amended (the “Hatch-Waxman Act”), the PPACA or in the European
Union  under  Directive  2001/83/EC,  as  amended,  and  Regulation  (EC)  No.  1901/2006,  as
amended, or rights similar thereto in other countries or regulatory jurisdictions.  If a Regulatory
Authority  confers  more  than  one  type  of  exclusivity  with  respect  to  a  biological  product  in  a
country or jurisdiction (e.g., the FDA grants both biologic drug reference product exclusivity and
orphan drug exclusivity with respect to such biological product), Regulatory Exclusivity will be
deemed  to  apply  to  such  biological  product  in  such  country  or  jurisdiction  so  long  as  any
exclusivity granted to such biological product prevents such Regulatory Authority from granting
any regulatory approval of a Third Party product that has an amino acid sequence that is the same
as or substantially identical to the amino acid sequence of such biological product or making any
cross reference to data held by such Regulatory Authority.

1.73

[***].

“Research” means scientific investigation and non-clinical activities to discover, identify,

1.74
characterize and optimize antibodies.

1.75

“Specified Xencor Know-How” means [***].

1.76

“Target Prostate Antigen” means [***].

13

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

“Target Prostate Antigen Binding Domain” means a Binding Domain which binds any

1.77
epitope of the Target Prostate Antigen.

“Tax”  or  “Taxes”  means  any  present  or  future  taxes,  levies,  imposts,  duties,  charges,

1.78
assessments or fees of any nature (including any interest thereon).

1.79

“Territory” means worldwide.

1.80

“Third Party” means any Person other than a Party or any of its Affiliates.

1.81

“U.S.” means the United States of America.  

1.82
“Valid  Claim”  means  a  claim  of:  (a)  of  any  issued,  unexpired  patent  that  has  not  been
revoked  or  held  unenforceable  or  invalid  by  a  decision  of  a  court  or  governmental  agency  of
competent jurisdiction from which no appeal can be taken, or with respect to which an appeal is
not taken within the time allowed for appeal, and that has not been disclaimed or admitted to be
invalid or unenforceable through reissue, disclaimer or otherwise; or (b) of any patent application
that  has  not  been  cancelled,  withdrawn  or  abandoned,  without  being  re-filed  in  another
application in the applicable jurisdiction or has not been pending or filed more than seven  years
from  the  earliest  possible  priority  date  for  said  application,  provided  that  if  such  claim  is  later
issued, it will from the issuance date forward, be deemed to be a Valid Claim, subject to clause (a)
of this Section 1.83.  

1.83

“Variant” means [***].  

1.84

“Variant Binding Domain” means[***].

“Xencor Binding Domain” means (a) any Xencor proprietary CD28 Binding Domain or
1.85
Target  Prostate  Antigen  Binding  Domain  used  by  Xencor  for  incorporation  into  Licensed
Antibodies, or (b) [***].

“Xencor  Intellectual  Property”  means,  collectively,  the  Xencor  Research  Know-How

1.86
and Xencor Patents.  

1.87
“Xencor  Patents”  means  all  Patents  Controlled  by  Xencor  or  its  Affiliates  as  of  the
Effective Date or at any time during the Term that are necessary to Exploit ([***]) any Licensed
Antibody or Licensed Product, but excluding [***].  

1.88
“Xencor Platform Technology” means: (a) Patents Controlled by Xencor or its Affiliates
Covering or (b) Know-How Controlled by Xencor or its Affiliates that is disclosed by Xencor to
Janssen and describes, in either case ((a) or (b)), [***].

“Xencor  Research  Intellectual  Property”  means,  collectively,  the  Xencor  Research

1.89
Know-How and Xencor Research Patents.

1.90

“Xencor Research Know-How” means:

14

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

(a)

Know-How,  but  not  Specified  Xencor  Know-How,  Controlled  by
Xencor  or  its  Affiliates  (or  an  invention  that,  at  a  previous  time,  was  such  Know-How  and  is
Covered in a Patent Controlled by Xencor or its Affiliates at the time the invention was applied or
incorporated) that is first incorporated by Xencor (or by Janssen with the Consent of Xencor) into
a Licensed Antibody or Licensed Product prior to [***];

(b)

Specified Xencor Know-How; and

Know-How Controlled by Xencor or its Affiliates at any time prior
to  the  end  of  the  Term  that  is  a  composition  of  matter  of  a  Xencor  Binding  Domain  or  Variant
Binding Domain thereof,

(c)

in each case ((a), (b) and (c)), including those Inventions assigned to Xencor pursuant to Section
9.2.2.2(a) and Xencor’s interest in Joint Inventions.  

1.91

“Xencor Research Patents” means [***].

1.92 Additional  Definitions.    Each  of  the  following  definitions  is  set  forth  in  the  Section  of
this Agreement indicated below:  

Defined Term
1974 Convention
Acquirer Competing Product
Acquirer Intellectual Property
Acquiring Party
Agreement
Alliance Manager
Anti-Corruption Laws
API
Applied Janssen Technology
Backup
Bankruptcy Code
Beneficial Owner
Beneficial Ownership
Biosimilar Application
Bispecific Competing Product
BLA
Breaching Party
Business Combination
Candidate Selection
Candidate Selection Date
CDR
Claim Basis

15

Section
16.5
8.4.5.1
9.9.1
8.4.6
the Introduction
2.7
11.8.1(a)
1.64
13.6.2.1(a)
7.2.1
13.5.2
1.11(e)
1.11(e)
9.4.4
8.4.1.1
1.29
13.2.1
1.11(c)
3.7.3
3.7.3
1.4
12.3.2

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Defined Term
Clinical Reverted Product
CMC Development Activities
Co-Chair
Co-Detailing Agreement
Co-Detailing Data Package
Co-Detailing Data Package Delivery Date
Co-Detailing Option
Co-Detailing Option Exercise Date
Co-Detailing Plan
Co-Funding Option
Co-Funding Option Exercise Date
Co-Funding Opt-Out
Co-Funding Opt-Out Effective Date
Co-Funding Opt-Out Notice
Co-Funding Sales Milestone Event
Co-Funding Sales Milestone Payment
Co-Funding Wind-down Period
Committee Matters
Competing Product
[***]
Component Allocation Notice
Confidential Information
Contemplated Transactions
Cost Report
Cost Variances
CPR Mediation Procedure
CPR Rules
Create Act
Cure Period
Data Package
Data Package Delivery Date
Derived Competing Product
Detail
Detailing
Development Budget
Development FTE
Development FTE Costs
Development FTE Rate
Development Reconciliation Procedures
Disclosing Party

16

Section
13.6.2.6
1.26(b)
2.4.2
6.3.3.5
6.3.1.2
6.3.1.3
6.1
6.3.2
6.3.3.4
6.1
6.2.2
6.2.4
6.2.4
6.2.4
7.3.2
7.3.2
6.2.4(g)
2.5.2
8.4.1.2
[***]
1.64
10.1.2
14.2.1
6.2.3.4(c)(iii)
6.2.3.1(a)(ii)
15.3.1
15.4.1
9.3.1.7
13.2.1
3.7.1
3.7.1
8.4.1.3
6.3.3.6
6.3.3.6
6.2.3.2(b)(iii)
6.2.3.1(b)
6.2.3.1(c)
6.2.3.1(d)
6.2.3.4(c)(ii)
10.1.1

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Section
Defined Term
15.1
Dispute
7.4.3.4(b)
Effective Royalty Rate
5.1.1
Eligible Prostate Products
the Introduction
Execution Date
2.5.1.2
Executive Officers
11.5.2
Existing Xencor Intellectual Property
2.5.1.4(a)
Expert
2.5.1.4(a)
Expert Panel
8.4.1.4
First Exclusivity Period
7.2.1
First Licensed Product
16.14
Force Majeure
6.2.3.2(a)
GDP
6.2.3.2(a)
Global Development Plan
1.73
Hatch-Waxman Act
6.2.3.2(b)(iv)
Included Medical Affairs Studies
6.2.3.1(e)
Included Medical Affairs Studies Costs
6.2.3.1(g)(iv)
Included Medical Affairs Studies Costs Limit
1.11(b)
Incumbent Board
12.3.1
Indemnification Claim
12.3.2
Indemnitee
12.3.2
Indemnitor
Independent Prostate Combination Regimen Study 5.1.2
Infringement Action
Infringement Claim
Insolvency Event
Invalidity Claim
Inventions
Janssen
Janssen Assigned Inventions
Janssen Eligible Prostate Products
Janssen Indemnitees
[***]
[***]
JDC
JFC
Joint Inventions
Joint Patent Costs
Joint Patents

9.4.2.1
9.8
13.5.1
9.7.1
9.2.1
the Introduction
8.1.4
5.1.1
12.2
[***]
[***]
2.2.1
2.3
9.2.2.3
9.3.3.3(a)
9.2.2.3

17

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Section
[***]
2.1.1
10.6
12.1
1.29
6.2.3.1(a)
3.8
7.2.1
7.2.1
13.2.1
6.2.3.1(a)(iii)
6.2.3.1(f)
1.11(a)
1.11(a)
the Introduction
9.1
6.3.3.5(b)

Defined Term
[***]
JRC
JRD
Losses
MAA
Manufacturing Cost of Clinical Supply
Materials
Milestone Event
Milestone Payment
Non-breaching Party
Other Costs Not Included in Standard
Out-of-Pocket Expenses
Outstanding Common Stock
Outstanding Voting Securities
Party
Patent Representative
PDE
Permitted Prostate Combination Regimen Study 5.3
Permitted Study Plan and Budget
PHSA
POC Data Package
POC Data Package Delivery Date
Primary Antibody
Product Infringement
Product Marks
Proof-of-Concept
Proof-of-Concept Date
Proposal Delivery Date
Proposal Review Period
Prosecute
Prosecution
Prostate Combination Regimen
Protocol
[***]
Public Official
Purple Book
Quarterly Net Sales
Receiving Party
Regulatory Documentation and Filings

5.3.3
1.73
6.2.1.2
6.2.1.3
1.56
9.4.1
9.10
6.2.1.1
6.2.1.1
5.2.1
5.2.2
9.3.1.2
9.3.1.2
5.1.3
15.4.6
[***]
11.8.4
9.6
7.4.3.4(a)
10.1.1
13.6.2.4

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

18

Defined Term
Research Clone Banking
Research License
Research Plan
Research Program
Research Program Results
Research Program Term
[***]
Reverted Antibody
Reverted Derivative
Reverted Product
Reverted Product Derivative
Reverted Variant
Royalty Term
Royalty-Bearing Patent
Sales Milestone Event
Sales Milestone Payment
Scale-Up
Second Exclusivity Period
[***]
Shared Development Costs
Specified Person
Standard Cost of Goods Manufactured
Subcontract
Subcontractor
Supplemental Application
Target Criteria
Term
Third Party Compensation
Third Party Competitive Product
Third Party License
Third Party Prostate Agreement
Unadjusted Quarterly Royalties
Xencor
Xencor CD28 Inventions
Xencor Eligible Prostate Products
Xencor Indemnitees
[***]
Xencor Prostate Antigen xCD28 Patents

Section
13.6.2.1(b)
8.1.1.1
3.2.1
3.1
10.1.4
3.1
13.6.2.3
13.6.2.1(c)
13.6.2.1(d)
13.6.2.1(f)
13.6.2.1(g)
13.6.2.1(e)
7.4.2
7.4.2
7.3.1
7.3.1
8.4.1.5
8.4.1.6
[***]
6.2.3.1(g)
1.11(a)
6.2.3.1(a)(i)
16.3
16.3
1.29
3.2.2
13.1
1.20
9.4.1
7.4.3.2(a)
5.1.4
7.4.3.4(c)
the Introduction
11.5.2
5.1.1
12.1
[***]
9.3.1.2

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

19

ARTICLE 2
GOVERNANCE

2.1

Joint Research Committee.  

2.1.1

JRC Formation; Composition.  The Parties will establish a joint research committee
(the “JRC”) promptly after the Effective Date.  The Parties will use reasonable efforts to establish
the JRC and hold the first meeting of the JRC within [***] days after the Effective Date.  The JRC
will  be  composed  of  at  least  [***]  employee  representatives  of  each  Party.    Each  JRC  member
must have the appropriate capabilities and experience to carry out the responsibilities of the JRC
and sufficient seniority within the applicable Party to make decisions arising within the scope of
the JRC’s responsibilities.  Each Party may change its JRC representatives from time to time in its
sole discretion, effective upon written notice to the other Party of such change.  The JRC will be
disbanded after the completion of the Research Program.

2.1.2

JRC  Responsibilities.    The  JRC  will:  (a)  serve  as  a  forum  for  and  facilitate
communications  between  the  Parties  with  respect  to  the  activities  conducted  under  the  Research
Plan;  (b)  prepare,  discuss,  and  approve  amendments  to  the  Research  Plan  in  accordance  with
Section  3.2;  and  (c)  perform  the  other  functions  that  are  expressly  delegated  to  the  JRC  in  this
Agreement.

2.2

Joint Development Committee.  

2.2.1

JDC  Formation;  Composition.    The  Parties  will  establish  a  joint  development
committee (the “JDC”) promptly after Candidate Selection.  The JDC will be composed of at least
[***]  employee  representatives  of  each  Party.    Each  JDC  member  must  have  the  appropriate
capabilities  and  experience  to  carry  out  the  responsibilities  of  the  JDC  and  sufficient  seniority
within the applicable Party to make decisions arising within the scope of the JDC’s responsibilities.
 Each Party may change its JDC representatives from time to time in its sole discretion, effective
upon written notice to the other Party of such change.  If Xencor exercises the Co-Funding Option
in  accordance  with  Section  6.2,  the  JDC  will  be  disbanded  after  the  completion  of  the  GDP
activities.  If Xencor does not exercise the Co-Funding Option in accordance with Section 6.2, the
JDC  will  be  disbanded  within  [***]days  after  the  POC  Data  Package  Delivery  Date  except  for
purposes relating to Independent Prostate Combination Regimen Studies.  

2.2.2

JDC Responsibilities.  

2.2.2.1

The  JDC  will  serve  as  a  forum  for  and  facilitate  communications
between the Parties with respect to: (a) the reports provided by Janssen under Section 4.4.2.1 prior
to  Xencor’s  exercise  of  the  Co-Funding  Option;  and  (b)  proposed  Independent  Prostate
Combination Regimen Studies in accordance with Section 5.2.3.  Prior to Xencor’s exercise of the
Co-Funding Option, the JDC will have no decision-making authority except as expressly described
in Section 5.2.3.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

20

2.2.2.2

If  Xencor  exercises  the  Co-Funding  Option  in  accordance  with
Section  6.2,  the  JDC  will:  (a)  serve  as  a  forum  for  and  facilitate  communications  between  the
Parties with respect to the activities conducted under the GDP and CMC Development Activities;
(b) discuss and approve amendments to the GDP in accordance with Section 6.2.3; and (c) perform
the other functions that are expressly delegated to the JDC in this Agreement.  

Joint  Finance  Committee.    If  Xencor  exercises  the  Co-Funding  Option  in  accordance
2.3
with Section 6.2, the Parties will establish a joint finance committee (the “JFC”) promptly after
the Co-Funding Option Exercise Date.  The JFC will: (i) coordinate and conduct the budgeting,
accounting,  reporting,  reconciliation  and  other  financial  activities  with  respect 
the
Development Budget and Shared Development Costs to the extent provided in Section 6.2; (ii) if
requested  by  the  JDC,  develop  and  recommend  to  the  JDC  for  approval  a  process  for  the
development  and  approval  of  budgets  contemplated  by  Section  6.2;  and  (iii)  perform  the  other
functions  with  respect  to  the  Development  Budget  and  Shared  Development  Costs  that  are
expressly  delegated  to  the  JFC  in  this  Agreement.    The  JFC  will  be  composed  of  employee
representatives  of  each  Party,  each  with  reasonable  expertise  in  the  areas  of  accounting,  cost
allocation, budgeting and financial reporting and sufficient seniority within the applicable Party to
make decisions arising with the scope of the JFC’s responsibilities.  The JFC will be disbanded
after the completion of the GDP activities and reimbursement of all Shared Development Costs.

to 

2.4 Meetings and Minutes.  

2.4.1 Frequency of Meetings.  Each Committee will hold meetings in accordance with a
schedule  established  by  mutual  written  agreement  of  the  Parties.    Each  Committee  will  meet  at
least once each Calendar Quarter, unless otherwise agreed by the Committee.  A Committee may
meet  in  person  or  by  means  of  teleconference,  Internet  conference,  videoconference  or  other
similar  communications  equipment,  as  agreed  to  by  the  Committee  members.    Each  Party’s  Co-
Chair may also call for special meetings to resolve particular matters requested by such Party upon
[***]prior written notice to the other Party’s Committee members.  

2.4.2 Co-Chairs.  For each Committee, each Party will designate one of its representatives
to  co-chair  the  meetings  of  the  Committee  (each,  a  “Co-Chair”).   The  Co-Chairs  will,  with  the
assistance of the Alliance Managers, coordinate and prepare the agenda for, and ensure the orderly
conduct of, the meetings of each Committee.

2.4.3 Preparation and Attendance.  The Co-Chairs will, with the assistance of the Alliance
Managers,  solicit  agenda  items  from  Committee  members  and  provide  an  agenda,  along  with
appropriate information for such agenda, reasonably in advance of any meeting. The agenda will
include  all  agenda  items  requested  by  either  Co-Chair.  Each  Party  will  bear  its  own  expenses
related to its Committee representatives’ participation in and attendance at such meetings.

2.4.4 Meeting  Minutes.    Each  Party,  through  its  Co-Chair  and  Alliance  Manager,  will
alternate responsibility for preparing written minutes of the meetings of each Committee and will
provide the draft minutes to the Committee members for review no later than [***]after the date

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

21

of the meeting to which the minutes pertain.  Draft minutes will become final and deemed to be
approved if the Parties do not provide any comments to the minutes within [***]of receipt by the
Committee members (or such additional period of time as mutually agreed by the Parties).  If a
Party provides comments to the minutes within such period (or such additional period of time as
mutually agreed by the Parties), the Committee members of each Party will discuss such comments
in good faith to resolve any discrepancies within five Business Days after receipt of such
comments.

2.5

Decision-Making.  

2.5.1 Committee  Actions. 

  Each  Committee  will  determine,  approve  or  resolve
Committee  Matters  within  the  authority  of  the  Committee  by  unanimous  vote,  with  each  Party’s
representatives on the Committee collectively having one vote. If the Committee representatives of
the  Parties  do  not  reach  consensus  as  to  a  particular  Committee  Matter  within  [***]after  such
matter is first presented to the Committee (or [***]), then the following provisions of this Section
2.5.1 will apply.

2.5.1.1

With  respect  to  the  JRC,  neither  Party  will  have  final  decision
making authority with respect to Committee Matters of the JRC, and any such Committee Matter
will be deemed not to have been approved by the JRC, unless and until the JRC reaches consensus,
or the Parties agree, on such matter.

2.5.1.2

With respect to the JDC, either Party may refer the Committee Matter
to  [***]and  [***]  for  resolution.    Such  Executive  Officers  shall  endeavor  to  meet  promptly  to
discuss  the  matter.    If  the  Executive  Officers  do  not  reach  consensus  on  such  Committee  Matter
within [***]after such matter is referred to them, then Janssen will have the final decision making
authority with respect to the Committee Matter, except as otherwise specified in Section 5.2.3.

2.5.1.3

With respect to the JFC, either Party may refer a Committee Matter
of the JFC (other than a [***]) for resolution by an independent Third Party accounting firm.  If
either  Party  refers  a  matter  for  resolution  by  an  independent  Third  Party  accounting  firm,  the
Parties  will  mutually  select  and  engage  an  independent  Third  Party  accounting  firm  that  has  no
auditing  or  other  financial  relationship  with  either  Party  or  any  of  its  Affiliates  to  resolve  the
matter.  If the Parties are unable to agree on the identity of the Third Party accounting firm within
[***] of the date on which a Party refers such matter for resolution pursuant to this Section, the
Third Party accounting firm will be one of the “big four” accounting firms that is not the external
auditor of either Party.  The accounting firm will, as soon as reasonably practicable after the firm is
engaged and acting as expert and not an arbitrator, deliver a report to each Party with its analysis
and determination of the Committee Matter.  The accounting firm’s determination will be final and
binding  on  the  Parties,  and  the  amounts  payable  to  the  firm  for  these  services  will  be  shared
equally  by  the  Parties.    If,  however,  the  Committee  Matter  relates  to  an  amount  less  than  [***],
then Janssen will have the final decision making authority with respect to such Committee Matter
instead of an independent Third Party accounting firm.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

22

2.5.1.4

With respect to the JFC, either Party may refer a Committee Matter

that is a [***] for resolution by an Expert Panel according to the following procedures:

(a)

Each  Party  will  select  one  Third  Party  expert  who  is  neutral,
disinterested  and  impartial,  and  has  experience  relevant  to  the  specific  subject  matter  of  the
referred Committee Matter, within [***] after either Party requests resolution by an Expert Panel
(each, an “Expert”).  The Experts selected by the Parties shall jointly select a third Expert within
[***]thereafter (the three Experts together, the “Expert Panel”).  

(b) Within  [***]  after  the  Expert  Panel  has  been  selected,  each  Party
will provide to the Expert Panel and the other Party a written report setting forth its position on the
referred Committee Matter.  Each Party may update its own report within [***] after receiving the
other Party’s report.  If requested by the Expert Panel, each Party will make oral submissions based
on  its  written  report  and  each  Party  will  have  the  right  to  be  present  during  any  such  oral
submissions.

(c)

Within  [***]  after  receiving  the  last  report  or,  if  requested  by  the
Expert Panel, the oral submissions, the Expert Panel will select one Party’s position on the referred
Committee  Matter  as  its  final  decision.    The  Expert  Panel  will  not  have  the  authority  to  modify
either Party’s position or to render any substantive decision other than to select one Party’s position
on  the  referred  Committee  Matter  as  set  forth  in  such  Party’s  written  report  most  recently
submitted to the Expert Panel.  The decision of the Expert Panel will be the Parties’ sole, exclusive
and  binding  resolution  of  the  referred  Committee  Matter,  and  the  Expert  Panel’s  decision  will
become the decision of the JFC on the matter.

Parties.  Each Party will bear its own costs of participating in the proceeding.

(d)

The costs and fees of the Expert Panel will be shared equally by the

The Parties will use, and will direct the Expert Panel to use, Diligent
Efforts  to  resolve  the  referred  Committee  Matter  within  [***]  after  either  Party  requests  such
resolution.

(e)

portion (if any) of such proceedings shall be conducted in [***].

(f)

Unless otherwise mutually agreed upon by the Parties, the in-person

2.5.2 Limitations of Committee Authority.  Each Committee will only have authority to
determine, approve or resolve matters that such Committee is expressly authorized to determine,
approve  or  resolve  under  this  Agreement  (“Committee  Matters”).    No  Committee  has  the
authority  to:  (a)  modify  or  amend  the  terms  and  conditions  of  this  Agreement;  (b)  waive  or
determine either Party’s compliance with the terms and conditions of this Agreement; (c) decide
any issue in a manner that would conflict with the express terms and conditions of this Agreement;
(d) decide any issue for which this Agreement expressly requires a Party’s approval or consent; or
(e) resolve any Dispute under this Agreement.

Subcommittees.    From  time  to  time,  each  Committee  may  establish  subcommittees  to

2.6
perform particular tasks and oversee particular projects or activities within the Committee’s

23

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

authority.  Each subcommittee will be constituted and will operate as the forming Committee
determines, provided that no subcommittee will have any decision-making authority, but will
instead make recommendations to the forming Committee with respect to matters within its
authority.

Alliance  Managers.    Promptly  after  the  Effective  Date,  each  Party  will  appoint  an
2.7
individual to act as the alliance manager for such Party with respect to this Agreement (each, an
“Alliance Manager”).  The Alliance Managers will not be members of any Committee, but will
be  permitted  to  attend  meetings  of  any  Committee  as  nonvoting  observers.    The  Alliance
Managers will be the primary point of contact for the Parties regarding this Agreement and will
facilitate communication regarding all activities under this Agreement.  Each Party may change
its designated Alliance Manager from time to time upon notice to the other Party.

ARTICLE 3
RESEARCH

3.1
Overview.  The Parties will collaborate to conduct a program of research and development
of Licensed Antibodies in accordance with the Research Plan, including antibody discovery and
biology  efforts  through  Candidate  Selection  (the  “Research Program”),  as  further  described  in
this ARTICLE 3.   The  objective  of  the  Research  Program  is  to  Research  one  or  more  Licensed
Antibodies that meet the target criteria set forth in the Research Plan.  The time period beginning
on the Effective Date and ending on the earlier of (a) the third anniversary of the Effective Date
and  (b)  the  date  of  Candidate  Selection  in  accordance  with  Section  3.7  is  referred  to  as  the
“Research Program Term.”

3.2

Research Plan.  

3.2.1

Initial  Plan.    The  Parties  have  agreed  upon  a  draft  of  a  written  research  plan
describing the Research Program (the “Research Plan”).  The draft of the initial Research Plan is
attached  to  this  Agreement  as  Exhibit  3.2.    The  Parties  will  use  Diligent  Efforts  to  finalize  the
initial Research Plan as soon as possible after the Execution Date.  The finalized initial Research
Plan will be approved by the JRC in accordance with Section 3.2.3.

3.2.2 Contents.  The initial Research Plan includes, and any amended Research Plan will
include,  the  following  elements:  (a)  descriptions  of  the  key  activities  to  Research  Licensed
Antibodies;  (b)  a  target  timeline  for  completing  the  activities;  (c)  Janssen’s  target  criteria  for
Licensed  Antibodies  (the  “Target  Criteria”);  and  (d)  certain  Materials  that  will  be  provided  by
Xencor and Janssen.

3.2.3 Amendments.  Either Party may propose amendments to the Research Plan at any
time during the Research Program Term. All amendments require approval of the JRC. If the JRC
approves  an  amendment,  the  amendment  becomes  effective  upon  the  date  of  JRC  approval.  A
written copy of the amended Research Plan will be prepared by one of the Parties, as decided by
the JRC, and provided to both Parties.

3.3
Conduct of Research Program Activities.  Xencor will be responsible for conducting all
Research Plan activities, except Janssen will be responsible for conducting the activities assigned
to Janssen under the Research Plan. Each Party will carry out the activities assigned to

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

24

it in the Research Plan in accordance with the timeline set forth in the Research Plan.  Each Party
will keep the other Party reasonably informed as to the progress of the conduct of such activities
through meetings of the JRC.  Each Party will conduct its Research Program activities in good
scientific manner and in compliance with all applicable Laws, including GLP.

3.4

Binding Domains.

3.4.1

Janssen  Binding  Domains.    Janssen  will  designate  and  provide  [***]  proprietary
Target  Prostate  Antigen  Binding  Domains  to  Xencor  for  the  purpose  of  Researching  Licensed
Antibodies  incorporating  such  binding  domain  in  the  Research  Program.    Janssen  may  provide
such  binding  domains  to  Xencor  either  by  providing  tangible  materials  containing  the  binding
domain or by disclosing the amino acid sequence of the binding domain.

3.4.2 Xencor Binding Domains.  Xencor will designate and use in the Research Program
at  least  one  of  its  proprietary  CD28  Binding  Domains  and  at  least  one  of  its  Target  Prostate
Antigen Binding Domains for the purpose of Researching Licensed Antibodies incorporating such
binding domains.

3.4.3 Restrictions on Use of Binding Domains.  

3.4.3.1

During  and  after  the  Term,  neither  Janssen  nor  any  of  its  Affiliates
will  use,  nor  have  any  right  to  use,  any  Xencor  Binding  Domain  except  to  the  extent  Janssen  is
granted a license to Exploit the Licensed Antibodies and Licensed Products under this Agreement.
 For clarity, Xencor retains the right to use any Xencor Binding Domain in any product that is not a
Licensed Antibody or Licensed Product during or after the Term.

3.4.3.2

During  and  after  the  Term,  neither  Xencor  nor  any  of  its  Affiliates
will  use,  nor  have  any  right  to  use,  any  Janssen  Binding  Domain  except  to  the  extent  Xencor  is
granted  a  license  to  Research  the  Licensed  Antibodies  and  Exploit  the  Reverted  Products  and
Reverted Product Derivatives  under  this  Agreement.  For  clarity,  Janssen  retains  the  right  to  use
any Janssen Binding Domain in any product that is not a Licensed Antibody or Licensed Product
during or after the Term.

3.5
Research  Program  Costs.    Xencor  will  bear  all  costs  incurred  by  Xencor  and  its
Affiliates in conducting the Research Program activities. Janssen  will  bear  all  costs  incurred  by
Janssen and its Affiliates in conducting the Research Program activities allocated to Janssen under
the Research Plan.

3.6

Records; Reports.

3.6.1 Records.  Xencor will maintain, consistent with its then-current internal policies and
practices,  and  cause  its  employees  and  subcontractors  to  maintain,  records  and  laboratory
notebooks  of  its  Research  activities  under  the  Research  Plan  in  sufficient  detail  and  in  a  good
scientific  manner  appropriate  for  regulatory  and  intellectual  property  protection  purposes.  If
requested by Janssen, Xencor will provide Janssen with a copy of any such records to the extent
specific to any Primary Antibody.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

25

3.6.2 Reports  and  Data  Packages.    Xencor  will  provide  periodic  updates  and  reports
regarding  the  Research  Program  activities  and  results  to  Janssen  through  the  JRC,  including
summaries of the data and information generated and, if reasonably requested by Janssen, any raw
data relating to such activities to the extent specific to any Primary Antibody. During the Research
Program Term, upon request of Janssen, Xencor will provide Janssen with information about the
Xencor Platform Technology used by Xencor to Research any Licensed Antibody.

3.7

Candidate Selection.

3.7.1 Promptly after completing all Research Program activities, Xencor will prepare and
deliver to Janssen in writing a complete package of all reasonably relevant data and results of the
Research Program activities for all Licensed Antibodies (the “Data Package”).  If Janssen notifies
Xencor within [***] following receipt that the Data Package is not complete, Xencor will provide
the  missing  data  and  results  as  soon  as  possible.    The  date  on  which  Janssen  is  in  receipt  of  a
complete Data Package is deemed to be the “Data Package Delivery Date.”

3.7.2 Within [***] after the Data Package Delivery Date, Janssen will decide whether any
of the Licensed Antibodies that are the subject of the Data Package should be further Developed.
 Janssen will notify Xencor of its decision within the [***]period.

3.7.3

If Janssen decides that at least one of such Licensed Antibodies should be further
Developed,  the  notice  will  identify  which  Licensed  Antibody  or  Licensed  Antibodies  will  be
further  Developed.    This  decision  to  further  Develop  a  Licensed  Antibody  is  referred  to  as
“Candidate  Selection,”  and  the  date  on  which  Janssen  gives  such  notice  is  referred  to  as  the
“Candidate Selection Date.”  

3.7.4

If Janssen decides that none of the Licensed Antibodies that are the subject of the
Data  Package  should  be  further  Developed,  Janssen’s  notice  will  be  deemed  to  be  a  notice  to
terminate  this  Agreement  without  cause  in  accordance  with  Section  13.3.    If  Janssen  does  not
notify  Xencor  of  Candidate  Selection  within  the  [***]  period  after  the  Data  Package  Delivery
Date, the provisions of Section 13.4 will apply.

3.8 Materials.  In connection with the performance of activities under the Research Program,
either Party may provide to the other Party for use as research tools certain proprietary biological
materials  or  chemical  compounds,  such  as  control  molecules  (“Materials”  of  the  supplying
Party).    For  clarity,  Materials  do  not  include  precursors  for  manufacture  of  Antibodies  or
excipients to be used in formulations of Antibodies.  All Materials shall be used by the receiving
Party solely to perform its activities under the Research Program, shall not be used or delivered
by the receiving Party to or for the benefit of any Third Party without the prior written consent of
the supplying Party, and shall not be used by the receiving Party in research or testing involving
human subjects.  Any Materials supplied under this Section 3.8 are supplied “as is” and must be
used  with  prudence  and  appropriate  caution  in  any  experimental  work,  since  not  all  of  their
characteristics may be known.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

26

ARTICLE 4
DEVELOPMENT, MANUFACTURE AND COMMERCIALIZATION

4.1
General.  Janssen will have the sole and exclusive right to Research, Develop (including
conducting  all  regulatory  matters  with  respect  to),  Manufacture,  Commercialize  and  otherwise
Exploit Licensed Antibodies and Licensed Products in the Territory at its sole cost and expense,
except  that  Xencor  will  Research  Licensed  Antibodies  during  the  Research  Program  Term  in
accordance with ARTICLE 3.  Without limiting the foregoing:  

(a)

Development  conducted  by  Janssen  with  respect  to  Licensed
Antibodies  generated  by  Xencor  during  the  Research  Program  Term  will  include  all  activities
following  Candidate  Selection,  including  IND-enabling  activities.    Janssen’s  authority  over
Development  of  the  Licensed  Antibodies  will  include  the  right  to  conduct  Development  of
Combination  Regimens  that  include  the  Licensed  Products  and  other  Janssen  products  or  Third
Party products in Janssen’s sole discretion.

filings for the Licensed Products, including INDs/CTAs and Drug Approval Applications.  

(b)

Janssen will have the sole and exclusive right to hold all regulatory

Commercialization matters for the Licensed Products, including pricing and reimbursement.

(c)

Janssen  will  have  sole  decision-making  authority  over  global

4.2
Xencor  Assistance.    After  Candidate  Selection  and  until  [***],  Xencor  will  reasonably
cooperate with Janssen to provide reasonable technical assistance, and to transfer to Janssen any
Xencor Research Know-How licensed to Janssen under Section 8.1.1, as requested by Janssen to
facilitate  Janssen’s  Research  and  Development  efforts  related  to  Licensed  Antibodies  and
Licensed Products to Janssen.  Such cooperation will include providing Janssen with reasonable
access by teleconference or in-person at Xencor’s facilities to any Xencor personnel involved in
the performance of the Research Program.  [***].    

4.3

Diligence.  

4.3.1 Development  Diligence.    After  the  Candidate  Selection  Date,  Janssen  will  use
Commercially  Reasonable  Efforts  to  Develop  and  seek  Marketing  Approval  for  one  Licensed
Product for one Indication in the U.S., each of the Major European Countries and Japan.

4.3.2 Commercialization Diligence.  Following receipt of Commercialization Approval of
a  Licensed  Product  in  the  U.S.,  a  Major  European  Country  or  Japan,  Janssen  would  use
Commercially Reasonable Efforts to Commercialize the Licensed Product in such country.

4.4

Conduct of Activities.  

4.4.1 Standards of Conduct; Records.  Janssen will conduct all Development of Licensed
Antibodies and Licensed Products in good scientific manner and in compliance with all applicable
Law, including GMP, GLP and GCP, as applicable. Janssen will maintain, consistent with its then-
current  internal  policies  and  practices,  and  cause  its  employees  and  subcontractors  to  maintain,
records and laboratory notebooks of its Development activities under this Agreement in sufficient
detail and in a good scientific manner appropriate for regulatory and

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

27

intellectual property protection purposes.  Janssen will conduct all Commercialization activities
under this Agreement in compliance with all applicable Laws.

4.4.2 Reports.  

4.4.2.1

Janssen  will  provide  Xencor  with  periodic 

its
Development activities with respect to the Licensed Antibodies and Licensed Products for so long
as Janssen is conducting Development activities.  Such reports will be provided on a [***] basis
 after [***].  If Xencor exercises the Co-Funding Option in accordance with Section 6.2, Janssen
will  continue  to  provide  [***]  reports  in  accordance  with  6.2.3.3(d).    Otherwise,  Janssen  will
provide such reports on [***]  basis within [***] after [***].  Each such report will include results
of Development since the previous report and Janssen’s anticipated Development activities for the
subsequent four Calendar Quarters.

reports  on 

4.4.2.2

On an [***] basis within [***] after the completion of each Calendar
Year after the First Commercial Sale of any Licensed Product, Janssen will provide Xencor a high-
level  summary  of  its  Commercialization  launch  status  and  performance  for  Licensed  Products
since the previous summary and a high-level summary of Janssen’s projected Commercialization
activities for the subsequent Calendar Year.

ARTICLE 5
PROSTATE COMBINATION REGIMEN STUDIES

5.1

Definitions.  

5.1.1

“Eligible  Prostate  Products”  means:  (a)  with  respect  to  Janssen,  the  Licensed
Products and the Janssen products listed under the heading “Janssen Eligible Prostate Products” on
Schedule 5.1.1 (the “Janssen  Eligible  Prostate  Products”);  and  (b)  with  respect  to  Xencor,  the
Xencor products listed under the heading “Xencor Eligible Prostate Products” on Schedule 5.1.1
(the “Xencor Eligible Prostate Products”).

5.1.2

“Independent Prostate Combination Regimen Study” means a Clinical Study of

a Prostate Combination Regimen that meets all of the following criteria:

(a)

[***].  

5.1.3

“Prostate  Combination  Regimen”  means  a  Combination  Regimen  that  includes
one Janssen Eligible Prostate Product and one Xencor Eligible Prostate Product and may include
[***].

5.1.4

“Third  Party  Prostate  Agreement”  means,  with  respect  to  an  Eligible  Prostate
Product, any agreement or arrangement between a Party and a Third Party relating to such Eligible
Prostate Product that is in effect on the Execution Date.  

5.2

Prostate Combination Regimen Study Proposals.  

5.2.1 Study Proposals.  If a Party desires to conduct an Independent Prostate Combination

Regimen Study, such Party must first submit a detailed proposal for such study to

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

28

the other Party (with a copy to the other Party’s Alliance Manager).  The proposal will include a
draft study protocol that includes at least the following information: [***]. The proposal will also
include [***].  If the non-proposing Party notifies the proposing Party within [***] following
receipt that the proposal is not complete, the proposing Party will provide the missing information
as soon as possible.  The date on which the non-proposing Party is in receipt of a complete
proposal is deemed to be the “Proposal Delivery Date.”

5.2.2 Review of Proposals.  The other Party will consider the proposal in good faith and
will  notify  the  proposing  Party  in  accordance  with  Section  16.7  within  [***]  after  the  Proposal
Delivery  Date  (the  “Proposal Review Period”)  whether  it  objects  to  the  proposed  study.    If  the
non-proposing  Party  objects  to  the  proposed  study,  such  notice  will  state  the  reason  for  the
objection.  [***].

5.2.3 No Objection to Proposal.  If the non-proposing Party notifies the proposing Party
that it objects to the proposed study for a reason set forth in Section 5.2.2 and the proposing Party
does not agree that such reason applies to the proposed study, then the proposing Party may refer
the matter to the JDC for further discussion.  Such matter will be a Committee Matter of the JDC,
and the JDC will attempt to reach consensus on whether the reason applies or does not apply in
accordance  with  Section  2.5.1.2.    If  the  JDC  does  not  reach  consensus  on  whether  the  reason
applies (or if the Executive Officers do not reach consensus in accordance with Section 2.5.1.2, if
the matter is submitted to the Executive Officers), then [***].  

5.2.4 Third Party Prostate Agreements. Notwithstanding anything to the contrary in this

ARTICLE 5:

5.2.4.1

[***]

5.2.5 Retained Rights. 

5.2.5.1

Nothing  in  this  ARTICLE  5  is  intended  to  prohibit  or  otherwise
restrict a Party or its Affiliates from Exploiting, or entering into business relationships with one or
more Third Parties to Exploit, its Eligible Prostate Products, subject to the terms and conditions of
this Agreement with respect to the Licensed Antibodies and Licensed Products.  

5.2.5.2

A Party or any of its Affiliates may, at any time during the Term and
in its sole discretion, sell, assign, license, divest or otherwise transfer to a Third Party any of its
rights or assets relating to any of its Eligible Prostate Products, subject to terms and conditions of
this Agreement with respect to the Licensed Antibodies and Licensed Products.  If, as a result of
such transfer, such Party no longer has the right to conduct (or such Party is restricted by contract
from  conducting)  clinical  studies  of  the  applicable  Eligible  Prostate  Product,  then  such  Eligible
Prostate  Product  will  be  deemed  to  be  removed  from  Schedule  5.1.1  and  will  no  longer  be  an
“Eligible Prostate Product” for purposes of this Agreement.

5.2.5.3

A Party or any of its Affiliates may, at any time during the Term and
in  its  sole  discretion,  discontinue  (temporarily  or  permanently)  any  of  its  Development,
Manufacturing or Commercialization activities relating to its Eligible Prostate Products, subject to
the terms and conditions of this Agreement with respect to the Licensed Antibodies and

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

29

Licensed Products.  If a Party permanently discontinues all of such activities relating to one of its
Eligible Prostate Products, then such Eligible Prostate Product will be deemed to be removed from
Schedule  5.1.1  and  will  no  longer  be  an  “Eligible  Prostate  Product”  for  purposes  of  this
Agreement.

5.3
Conduct  of  Permitted  Prostate  Combination  Regimen  Studies.  If  the  non-proposing
Party does not object to an Independent Prostate Combination Regimen Study for one or more of
the  reasons  specified  in  Section  5.2.2  within  the  Proposal  Review  Period  in  accordance  with
Section 5.2, or does not respond to a proposal within the Proposal Review Period in accordance
with  Section  5.2,  the  proposing  Party  may  conduct  the  study  (a  “Permitted  Prostate
Combination  Regimen  Study”)  in  accordance  with  the  terms  and  conditions  set  forth  in  this
Section 5.3.  

5.3.1 Costs.  The conducting Party will be solely responsible for all costs and expenses of

conducting the Permitted Prostate Combination Regimen Study, including drug supply costs.

5.3.2 Anticipated  Supply  Requirements.    While  actual  supply  requirements  would  be

defined by a clinical trial supply agreement, the Parties anticipate [***].

5.3.3 Studies that include a Licensed Product.  If the proposing Party is Xencor and the
Permitted  Prostate  Combination  Regimen  Study  includes  a  Licensed  Product,  then  Xencor  will
provide Janssen a plan and budget for its conduct of the study (the “Permitted  Study  Plan  and
Budget”).    Within  [***]  after  the  receipt  of  the  Permitted  Study  Plan  and  Budget,  Janssen  will
have  the  right  to  elect,  by  providing  written  notice  to  Xencor,  to  conduct  the  Permitted  Prostate
Combination  Regimen  Study  itself  in  accordance  with  the  Permitted  Study  Plan  and  Budget.    If
Janssen  elects  to  conduct  the  study,  Janssen  will  use  Diligent  Efforts  to  perform  the  study  and
Xencor  will  reimburse  the  Out-of-Pocket  Expenses  and  Development  FTE  Costs  incurred  by
Janssen in performing the study (up to the budgeted amounts), all in accordance with the Permitted
Study Plan and Budget.  If Janssen does not elect to conduct the study within [***] days after the
receipt of the Permitted Study Plan and Budget, Xencor will have the right to conduct the study
under the terms of this Section 5.3.

5.3.4 Clinical  Trial  Agreement.    Before  the  commencement  of  the  Permitted  Prostate
Combination Regimen Study, the Parties will enter into a clinical trial agreement with respect to
the study.  The clinical trial agreement will include reasonable and customary terms for agreements
of its type, as well as the following terms:

5.3.4.1

[***].  

ARTICLE 6
XENCOR OPTION RIGHTS

6.1
General.    Janssen  hereby  grants  to  Xencor  the  right  to  elect  to  co-fund  worldwide
Development of Licensed Products in the Territory on the terms set forth in Section 6.2 (the “Co-
Funding Option”).  If Xencor exercises the Co-Funding Option in accordance with

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

30

Section 6.2, Janssen hereby grants to Xencor the right to elect to co-Detail Licensed Products in
the U.S. on the terms set forth in Section 6.3 (the “Co-Detailing Option”).  

6.2

Co-Funding Option.  

6.2.1 POC Data Package.  

6.2.1.1

Janssen will notify Xencor promptly following the Proof-of-Concept
Date  for  the  first  Licensed  Product  to  achieve  Proof-of-Concept.    “Proof-of-Concept”  means
[***].  “Proof-of-Concept  Date”  means,  with  respect  to  a  Licensed  Product,  the  date  on  which
Proof-of-Concept first occurs for such Licensed Product.

6.2.1.2

Within [***] after the date of such notice, Xencor will notify Janssen
of whether it requests Janssen to prepare and deliver a data package with respect to the Licensed
Products (a “POC Data Package”).  The POC Data Package will include: [***]

6.2.1.3

If  Xencor requests the  POC  Data  Package,  Janssen  will  provide  the
POC  Data  Package  to  Xencor  within  [***]after  the  request.    If  Xencor  notifies  Janssen  within
[***]after  receipt  of  the  POC  Data  Package  that  it  is  not  complete,  Janssen  will  provide  any
missing information, data or results as soon as practicable.  The date on which Xencor is in receipt
of a complete POC Data Package is referred to as the “POC Data Package Delivery Date.”

6.2.2 Exercise of Co-Funding Option.  Xencor  may  exercise  the  Co-Funding  Option  by
providing  notice  to  Janssen  within  [***]after  the  POC  Data  Package  Delivery  Date  (the  “Co-
Funding Option Exercise Date”).  

6.2.3 Effect  of  Co-Funding  Option  Exercise.    On  and  after  the  Co-Funding  Option
Exercise Date, the terms and conditions set forth in this Section 6.2.3 will apply with respect to the
Development of Licensed Products worldwide:

6.2.3.1

Definitions.  

(a)

“Manufacturing  Cost  of  Clinical  Supply”  means  a  Party’s
reasonable internal and Third Party costs incurred in manufacturing or acquisition of (and to the
extent  directly  attributable  to)  Licensed  Product,  determined  in  accordance  with  such  Party’s
standard  cost  accounting  policies  that  are  in  accordance  with  GAAP  and  consistently  applied
across  all  of  such  Party’s  manufacturing  network  to  other  products  that  the  Party  manufactures.
  Manufacturing  Cost  of  Clinical  Supply  does  not  include  any  costs  of  CMC  Development
Activities.  “Manufacturing  Cost  of  Clinical  Supply”  is  comprised  of  Standard  Cost  of  Goods
Manufactured, Cost Variances, and Other Costs Not Included in Standard, where:

“Standard Cost of Goods Manufactured” are budgeted unit
costs  established  to  facilitate  inventory  evaluation,  planning  and  budgetary  control,  including
direct materials, direct labor, product testing, transportation, depreciation and overhead (including
Third Party costs for manufacturing or acquisition of product or materials used in such

(i)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

31

manufacture), in each case, to the extent directly attributable to Licensed Products Manufactured
by a Party under this Agreement or under a supply agreement between the Parties;

(ii)

“Cost  Variances”  are  actual  costs  of  manufacturing  versus
Standard Cost of Goods Manufactured and include direct materials variances (including material
usage  variances  and  purchase  price  variances),  direct  labor  variances  and  overhead  variances
(including  but  not  limited  to  volume  variances,  variable  overhead  spending  variances  and  fixed
overhead spending variances) in each case to the extent directly attributable to Licensed Products
Manufactured by a Party under this Agreement or under a supply agreement between the Parties;
and

(iii)

“Other Costs Not Included in Standard” are actual costs of
manufacturing  which  are  incurred  in  the  normal  course  of  business  but  are  not  included  in  the
Standard  Cost  of  Goods  Manufactured,  including,  but  not  limited  to:  cash  discounts  on  raw
material purchases, transportation expenses, manufacturing trial runs, manufacturing development
expenses,  start-up  costs,  appropriation  expenses,  abnormal  capacity  or  idle  facility  costs  (to  the
extent such capacity or portion of a facility is reserved for Manufacturing Licensed Antibodies or
Licensed  Products  under  this  Agreement  or  a  supply  agreement  between  the  Parties),  shut-down
costs,  material  scrapped  in  the  normal  course  of  business  (including  failed  commercial  batches),
rework,  obsolete  facility  and  machinery,  impairment  expenses,  full  absorption  adjustments,
inventory revaluation adjustments, lower of cost or market inventory adjustments, inventory write-
downs  and  write-offs,  physical  inventory  adjustments,  depreciation  of  equipment  or  instruments
placed at customer or other Third Party sites, new product introduction costs, technical operations,
internal  inventory  supply  management,  returned  goods,  royalty  expense,  and  product  liability
insurance, in each case to the extent directly attributable to Licensed Products Manufactured by a
Party under this Agreement or under a supply agreement between the Parties.  [***].  

(b)

“Development FTE” means [***] hours of work in direct support of
the Development of the Licensed Products that is carried out by one or more qualified employees
or  contractors  or  consultants  of  a  Party  or  its  Affiliates,  provided  that  one  individual  conducting
more than [***] of work in any Calendar Year will not be considered more than one Development
FTE and, in the case of work by an individual that is less than [***], will be pro-rated based on the
actual  number  of  hours  expended  by  such  individual.    Development  FTE  includes  scientific,
medical, technical and other personnel directly engaged in performing Development activities with
respect  to  the  Licensed  Products  (including  the  project  management  teams  that  support  the
Licensed Products).  Development FTE will not include work performed by personnel performing
administrative  and  corporate  functions  (including  human  resources,  finance,  legal  and  investor
relations).

“Development FTE Costs”  means,  with  respect  to  any  period,  the
amount  calculated  by  multiplying  the  Development  FTE  Rate  by  the  number  of  Development
FTEs expended by a Party during such period.

(c)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

32

(d)

“Development  FTE  Rate”  means  a  rate  of  [***]per  full-time
Development  FTE  per  Calendar  Year;  provided,  however,  that  such  rate  will  be  increased  or
decreased annually beginning on January 1, 2022 by the percentage increase or decrease in the CPI
between the last day of the most recently completed Calendar Year and December 31, 2020, or an
alternative methodology that is mutually agreed to by both Parties.  The Development FTE Rate is
“fully burdened” and will cover employee salaries (excluding stock-based compensation), benefits,
utilities, facilities, and travel expenses.

(e)

“Included Medical Affairs Studies Costs” means, with respect to a
particular Licensed Product, all Development FTE Costs and Out-of-Pocket Expenses incurred by
the  Parties  and  their  Affiliates  for  Included  Medical  Affairs  Studies  specified  in  the  GDP  with
respect to such Licensed Product.

(f)

“Out-of-Pocket Expenses” means amounts paid by or on account of
a  Party  to  Third  Party  vendors  or  contractors  for  supplies  and  materials  for  use,  or  for  services
provided by them, directly in the performance of Development activities relating to the Licensed
Antibodies and Licensed Products under this Agreement (or other activities for which sharing of
Out-of-Pocket  Expenses  is  otherwise  specified  in  this  Agreement).    For  clarity,  Out-of-Pocket
Expenses  do  not  include:  (a)  payments  for  the  Parties’  or  their  Affiliates’  salaries  or  benefits,
benefits,  utilities,  travel  expenses,  general  office  supplies,  insurance,  information  technology,
capital expenditures (or related depreciation), or the like; or (b) amounts paid relating to activities
that were not performed under this Agreement.

“Shared Development Costs”  means  Development  FTE  Costs  and
Out-of-Pocket  Expenses  incurred  by  the  Parties  and  their  Affiliates  in  conducting  Development
activities with respect to Licensed Products under the GDP, including:

(g)

(i)

all  Development  FTE  Costs  and  Out-of-Pocket  Expenses
incurred for activities specified in the GDP, including for Included Medical Affairs Studies up to
the  Included  Medical  Affairs  Studies  Costs  Limit  (as  defined  below),  and  all  Development  FTE
Costs  and  Out-of-Pocket  Expenses  incurred  for  CMC  Development  Activities,  even  if  not
specified in the GDP;

(ii)

with  respect  to  non-clinical  and  clinical  research  and  drug
development activities  for  the  Licensed  Products  (including  Clinical  Studies), the Manufacturing
Cost of Clinical Supply for Licensed Products and other drugs, biological products or devices used
in  such  Clinical  Studies  (including  Development  FTE  Costs  and  Out-of-Pocket  Expenses  to
purchase  or  package  Third  Party  drugs,  biological  products  and  devices)  and  Development  FTE
Costs and Out-of-Pocket Expenses for disposal of clinical samples;

with  respect  to  regulatory  activities  for  the  Licensed
Products,  Development  FTE  Costs  and  Out-of-Pocket  Expenses  for  fees  incurred  in  connection
with  regulatory  filings  (including  INDs/CTAs  and  Drug  Approval  Applications)  and  regulatory
approvals and for meetings with Regulatory Authorities; and

(iii)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

33

Expenses incurred that are expressly included in the Development Budget.

(iv)

any  other  Development  FTE  Costs  and  Out-of-Pocket

Notwithstanding  anything  to  the  contrary,  Shared  Development  Costs  do  not  include  [***]  (the
“Included Medical Affairs Studies Costs Limit”).

6.2.3.2

Global Development Plan and Budget.  

(a)

General.  Janssen will conduct Development of Licensed Products in
accordance  with  the  Global  Development  Plan.    “Global Development Plan”  or  “GDP”  means
the  written  plan  for  Janssen’s  Development  of  Licensed  Products  in  the  Territory  containing  the
information  set  forth  in  Section  6.2.3.2(b)  below,  as  it  may  be  amended  from  time  to  time  in
accordance with the terms of Section 6.2.3.2(c).  The GDP will include the Development Budget,
as described in Section 6.2.3.2(b)(iii) below.  

(b)

GDP Contents.  

The  GDP  will  include  all  Development  activities  that  are
reasonably  necessary  to  seek,  obtain  and  maintain  Commercialization  Approval,  and  to  support
and sustain Commercialization, of the Licensed Products in the Territory.

(i)

The  GDP  will  at  all  times  reflect  Commercially  Reasonable
Efforts to Develop and seek Marketing Approval for one Licensed Product for one Indication in
the U.S., each of the Major European Countries and Japan.

(ii)

(iii)

The  GDP  will 

for  Shared
Development Costs to be incurred by Janssen in conducting the Development activities described
in  the  GDP  that  are  scheduled  to  be  commenced  or  conducted  during  the  then-current  Calendar
Year and the succeeding Calendar Year (with respect to such Calendar Years, the “Development
Budget”).    The  [***]of  each  Development  Budget  will  be  binding  on  the  Parties  to  the  extent
provided in Section 6.2.3.4(d), and [***] of such Development Budget will serve as non-binding
guidance for the Parties.

[***]  budget 

include  a 

(iv)

The  GDP  will  also  describe  Included  Medical  Affairs
Studies.  “Included Medical Affairs Studies” means post-marketing commitments and other post-
approval  Clinical  Studies  conducted  in  support  of  obtaining  Marketing  Approval  of  a  Licensed
Product  (e.g.,  IISs,  cooperative  group  studies,  or  studies  conducted  by  Janssen  for  an  additional
Indication  or  label  expansion).    Each  Development  Budget  will  include  an  amount  for  Included
Medical Affairs Studies for each Calendar Year covered by such budget.

(c)

Initial GDP; Updates and Amendments.  

The  clinical  development  plan  and  budget  included  in  the
POC Data Package delivered by Janssen to Xencor under Section 6.2.1 will be the initial GDP and
Development Budget for the Licensed Products.  The GDP (including the Development

(i)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

34

Budget)  may  be  updated  and  amended  from  time  to  time  only  with  the  approval  of  the  JDC  (or
Janssen, under Section 2.5), as described below in this Section 6.2.3.2(c).

(ii)

The  JDC  will  review  the  GDP  annually.    Janssen  will
prepare, and submit to the JDC for review, an updated GDP (excluding the Development Budget)
on or before [***] of the then-current Calendar Year.  When Janssen is preparing the updated GDP,
Janssen  will  reasonably  consider  Xencor’s  input  into  the  Clinical  Study  design  and  key
Development  activities  in  the  GDP.    Janssen  will  prepare,  and  submit  to  the  JDC  for  review,  an
updated  Development  Budget  covering  each  of  [***]  Calendar  Years  on  or  before  [***]  of  the
then-current Calendar Year.

approval of such updates no later than [***] of each Calendar Year.

(iii)

The  JDC  will  use  reasonable  efforts  to  grant  preliminary

(iv)
will be submitted to each Party for its internal budgeting process.

Promptly after the JDC’s preliminary approval, such updates

After each Party performs its internal budgeting process, the
JDC will use reasonable efforts to grant final approval of such updates no later than [***] of each
Calendar  Year,  at  which  time  any  approved  updates  will  be  set  forth  in  writing  in  an  amended
version of the GDP.

(v)

Either Party may submit a proposed update or amendment to
the GDP to the JDC from time to time.  The JDC will discuss such proposal at its next meeting and
decide whether to approve such update or amendment.

(vi)

(d)

If the JDC approves an update or amendment to the GDP (including
any  corresponding  update  or  amendment  to  the  Development  Budget),  the  GDP  (including  the
Development  Budget)  will  be  deemed  to  be  amended  accordingly  on  the  date  of  such  approval.
 No update or amendment to the GDP will become effective unless and until the JDC (or Janssen,
under Section 2.5) approves a corresponding update or amendment to the Development Budget.

6.2.3.3

Conduct of Development Activities.  

(a)

General.    Section  4.3.1  will  no  longer  apply  to  any  Licensed
Products on and after the Co-Funding Option Exercise Date.  Janssen will use Diligent Efforts to
execute and to perform, or cause to be performed, the Development activities in the GDP for the
Licensed Products, in accordance with the timetables in the GDP.

Responsibility  for  Development  Activities.  Janssen  will  be  solely
responsible for conducting all Clinical Studies and all other Development activities in the GDP and
CMC Development Activities for the Licensed Products.

(b)

(c)

Safety Concerns.  

35

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

(i)

Notwithstanding  anything  to  the  contrary  in  this  Agreement
or the GDP, Janssen will not be obligated to commence or continue a Clinical Study of a Licensed
Product  if  Janssen  reasonably  determines  that  such  Clinical  Study  would  pose  an  unacceptable
safety or tolerability risk for the study subjects.  Janssen will so notify Xencor of its determination
and the Parties will discuss the concerns in good faith to determine whether to terminate, suspend,
modify or continue such Clinical Study.

(ii)

If  Xencor  believes  in  good  faith  that  termination  or
suspension  of  a  Clinical  Study  of  the  Licensed  Products  is  warranted  because  of  safety  or
tolerability  risks  to  the  study  subjects,  then  Xencor  will  so  notify  Janssen  and  the  Parties  will
discuss  Xencor’s  concerns  in  good  faith  to  determine  whether  to  terminate,  suspend,  modify  or
continue such Clinical Study.

(d)

Development  Reports.    Section  4.4.2.1  will  cease  to  apply  to  the
Licensed Products after Xencor exercises the Co-Funding Option in accordance with Section 6.2
but shall continue to apply after the Co-Funding Opt-Out Effective Date if Xencor provides Co-
Funding Opt-Out Notice.  In advance of each meeting of the JDC, Janssen will provide to the JDC
a  high-level  summary  report  summarizing  (a)  its  Development  activities  with  respect  to  the
Licensed  Products  that  Janssen  and  its  Affiliates  has  performed  or  caused  to  be  performed  since
the last meeting of the JDC, including an evaluation of the work performed, and the results thereof,
in relation to the goals of the GDP, and (b) its anticipated Development activities with respect to
the Licensed Products for the subsequent Calendar Quarter.

(e)

Day-to-Day Responsibility.  Janssen will be responsible for day-to-
day implementation of the Development activities with respect to the Licensed Products and will
have the right to make operational and administrative decisions with respect to how to implement
such Development activities (e.g., with respect to a Clinical Study, Janssen will have the right to
select and engage clinical trial sites), as long as such decisions do not conflict with the GDP or any
decision of the JDC with respect to such Development activity.

6.2.3.4

Shared Development Costs.

Cost  Sharing.    Shared  Development  Costs  incurred  on  or  after  the
Co-Funding Option Exercise Date by the Parties and their Affiliates will be borne 80% by Janssen
and 20% by Xencor, except as provided in Section 6.2.3.4(b).

(a)

(b) Medical  Affairs  Study  Costs.      Included  Medical  Affairs  Studies
Costs  for  Licensed  Products  will  be  included  in  Shared  Development  Costs  up  to  the  Included
Medical Affairs Studies Costs Limit.  Development FTE Costs and Out-of-Pocket Expenses costs
incurred to conduct studies to support reimbursement and other types of medical affairs studies that
are  not  Included  Medical  Affairs  Studies  will  not  be  included  in  Shared  Development  Costs  or
shared  by  Janssen  and  Xencor  and  will  be  borne  entirely  by  Janssen.    Janssen  shall  bear  all
Included  Medical  Affairs  Studies  Costs  in  excess  of  the  Included  Medical  Affairs  Studies  Costs
Limit.

(c)

Cost Reports.

36

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

(i)

Shared  Development  Costs  will  initially  be  borne  by  the
Party  incurring  the  cost  or  expense,  subject  to  reimbursement  as  provided  in  Section  6.2.3.4(d).
 Each Party will calculate and maintain records of Shared Development Costs incurred by it and its
Affiliates  in  accordance  with  procedures  to  be  established  by  the  JFC  in  coordination  with  the
JDC.

(ii)

The  procedures  for  quarterly  reporting  of  actual  results,
quarterly review and discussion of potential discrepancies, quarterly reconciliation, reasonable cost
forecasting, and other finance and accounting matters related to Shared Development Costs will be
prepared by Janssen and approved by the JFC (the “Development Reconciliation Procedures”).
 When Janssen is preparing the Development Reconciliation Procedures, Janssen will reasonably
consider Xencor’s input.

(iii)

The  Development  Reconciliation  Procedures  will  provide
that,  within  [***]  after  the  end  of  each  Calendar  Quarter,  each  Party  will  submit  to  the  JFC  a
report, in a format established by the JFC, of all Shared Development Costs incurred by such Party
and its Affiliates during such Calendar Quarter (each, a “Cost Report”).  Within [***] following
the  receipt  of  each  Cost  Report,  each  Party  will  have  the  right  to  request  reasonable  additional
information  (as  determined  by  the  JFC)  related  to  the  other  Party’s  and  its  Affiliates’  Shared
Development  Costs  during  such  Calendar  Quarter  in  order  to  confirm  that  such  other  Party’s
spending is in conformance with the approved Development Budget.  

(iv)

Janssen  will  prepare  and  the  JFC  will  approve  reasonable
procedures for the Parties to share estimated Shared Development Costs for each Calendar Quarter
before the end of such Calendar Quarter, to enable each Party to appropriately accrue its share of
Shared Development Costs for financial reporting purposes.  Janssen’s representatives on the JFC
will  have  the  primary  responsibility  for  performing  the  reconciliation  in  accordance  with  the
Development Reconciliation Procedures.

(d)

Reimbursement of Shared Development Costs.

(i)

The Party (with its Affiliates) that incurs more than its share
of the total actual Shared Development Costs with respect to a Calendar Quarter will be paid by
the other Party an amount of cash sufficient to reconcile to its agreed percentage of actual Shared
Development  Costs  in  such  Calendar  Quarter  under  Section  6.2.3.4(a).    Notwithstanding  the
foregoing,  on  a  Calendar  Year-to-date  basis,  the  Parties  will  not  share  any  Shared  Development
Costs in excess of the amounts allocated for such Calendar Year-to-date period in the Development
Budget, except as follows:

Shared  Development  Costs  in  excess  of  the
Development Budget will be included in the calculation of Shared Development Costs to be shared
by the Parties to the extent such excess Shared Development Costs do not exceed [***] of the total
Shared  Development  Costs  allocated  to  be  incurred  by  such  Party  and  its  Affiliates  in  the
applicable  Calendar  Year-to-date  period  in  accordance  with  the  Development  Budget  for  such
Calendar Year; and

(1)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

37

the  Parties  will  share  any  and  all  Shared
Development  Costs  in  excess  of  the  Development  Budget  to  the  extent  attributable  to:  (A)  a
change  in  applicable  Law;  (B)  Force  Majeure;  (C)  a  variation  in  actual  patient  enrollment  from
projected patient enrollment; (D) a change to a clinical trial protocol required or requested by any
Governmental  Authority;  (E)  increases  in  the  costs  of  comparator  drugs;  or  (F)  increases  to
Manufacturing Cost of Clinical Supply of a Licensed Product.

(2)

(ii)

 If any excess Shared Development Costs are excluded from
sharing by the Parties for a particular Calendar Year-to-date period pursuant to Section 6.2.3.4(d)(i)
(1),  such  excess  Shared  Development  Costs  will  be  carried  forward  to  the  subsequent  Calendar
Quarters  (provided  that  such  Calendar  Quarters  fall  within  the  same  Calendar  Year)  and,  to  the
extent  the  total  Shared  Development  Costs  incurred  by  such  Party  and  its  Affiliates  for  the
Calendar Year-to-date as of the end of such subsequent Calendar Quarter are less than [***] of the
aggregate Shared Development Costs allocated to such Party under the Development Budget for
such  Calendar  Year-to-date  period,  such  carried  forward  amounts  will  be  included  in  Shared
Development Costs to be shared by the Parties for such Calendar Year-to-date-period (i.e., so that
the  total  Shared  Development  Costs  incurred  by  such  Party  and  its  Affiliates  that  are  shared
pursuant to this Section during any Calendar Year do not exceed [***] of the Shared Development
Costs  allocated  to  such  Party  under  the  Development  Budget  for  such  Calendar  Year,  unless
otherwise  approved  by  the  JDC).    For  clarity,  at  the  end  of  the  Calendar  Year,  any  amounts  in
excess  of  [***]  of  the  aggregate  Shared  Development  Costs  allocated  to  such  Party  under  the
Development  Budget  for  such  Calendar  Year  will  be  borne  solely  by  such  Party  and  will  not  be
shared by the other Party.

(iii)

 The Development Reconciliation Procedures will require the
JFC to develop a written report setting out the calculation of any net amount owed by Xencor to
Janssen  or  by  Janssen  to  Xencor,  as  the  case  may  be,  as  necessary  to  accomplish  the  sharing  of
Shared Development Costs set forth in this Section, and to prepare such report promptly following
delivery  of  the  Cost  Reports  and  in  a  reasonable  time  (to  be  defined  in  the  Development
Reconciliation Procedures) in advance of payment.

The net amount payable to accomplish the sharing of Shared
Development Costs as provided under this Section will be paid by Janssen or Xencor, as the case
may be, [***] after the end of the applicable Calendar Quarter.

(iv)

6.2.4 Co-Funding Opt-Out.  Xencor may elect to terminate its rights and obligations set
forth in this ARTICLE 6 (“Co-Funding Opt-Out”), including its obligation to co-fund worldwide
Development of Licensed Products in the Territory, by giving notice to Janssen (the “Co-Funding
Opt-Out Notice”) at any time after the Co-Funding Option Exercise Date.  Such Co-Funding Opt-
Out shall become effective on the last day of the second full Calendar Quarter after Xencor gives
the  Co-Funding  Opt-Out  Notice  (the  “Co-Funding  Opt-Out  Effective  Date”).    For  example,  if
Xencor  gives  the  Co-Funding  Opt-Out  Notice  in  the  first  Calendar  Quarter  of  a  Calendar  Year,
then the Co-Funding Opt-Out would be effective as of the last day of the third Calendar Quarter of
such Calendar Year.  After the Co-Funding Opt-Out Effective Date, the following will apply:

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

38

(a)

  Xencor  will  have  no  further  rights  or  obligations  under  Section
6.2.3,  including  no  obligation  to  pay  any  portion  of  Shared  Development  Costs  incurred  or
attributable  to  Development  activities  after  the  Co-Funding  Opt-Out  Effective  Date,  except  for
reporting and reimbursement of Shared Development Costs incurred on or prior to the Co-Funding
Opt-Out Effective Date.

Janssen will have no further rights or obligations under Section 6.2.3
except for reporting and reimbursement of Shared Development Costs incurred on or prior to the
Co-Funding Opt-Out Effective Date.

(b)

The JDC and JFC will disband automatically, except as necessary to
resolve  matters  within  their  authority  relating  to  Development  prior  to  the  Co-Funding  Opt-Out
Effective Date.

(c)

deemed to have never exercised the Co-Funding Option.

(d)

For all purposes of Sections 2.2.2, 4.4.2.1 and 11.8, Xencor will be

(e)

For purposes of Section 7.3, after the Co-Funding Opt-Out Effective
Date all future Sales Milestone Payments will be calculated in accordance with the table in Section
7.3.1.    If  a  Co-Funding  Sales  Milestone  Event  has  previously  occurred  under  Section  7.3.2,  no
Sales  Milestone  Payment  (nor  the  difference  between  the  corresponding  Co-Funding  Sales
Milestone Payment and Sales Milestone Payment amounts) will be payable under Section 7.3.1 for
the corresponding Sales Milestone Event.  For example, [***]. 

(f)

For purposes of Section 7.4, after the Co-Funding Opt-Out Effective
Date royalties will be calculated and payable on the terms set forth in Section 7.4.1.1.  If the Co-
Funding Opt-Out Effective Date is not the last day of a Calendar Year, the royalty calculations will
continue to be based on cumulative Net Sales in the Calendar Year in which the Co-Funding Opt-
Out  Effective  Date  occurred,  but  the  royalty  calculations  will  be  made  using  the  royalty  rates  in
Section 7.4.1.1 beginning in the Calendar Quarter immediately following the Co-Funding Opt-Out
Effective Date.

(g)

The  Shared  Development  Costs  incurred  [***]  (the  “Co-Funding
Wind-down Period”) shall continue to be shared by the Parties on the terms set forth in Section
6.2.3, provided, however, that if Janssen amends the GDP to increase the aggregate amount of the
Development  Budget  for  such  Calendar  Quarters,  then  the  incremental  amount  of  the  increase
approved  by  Janssen  shall  be  excluded  from  Shared  Development  Costs  for  purposes  of  Section
6.2.3 during the Co-Funding Wind-down Period.

If  Xencor  exercised  the  Co-Detailing  Option  before  giving  the  Co-
Funding Opt-Out Notice, then Xencor will be obligated to continue conducting Detailing activities
in accordance with Section 6.3.3 until [***].

(h)

(i)

(j)

The first two sentences of Section 4.4.2.1 will apply.

Section 4.3.1 will apply.  

39

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

For clarity, Xencor’s exercise of the Co-Funding Opt-Out is irrevocable as of the date of the Co-
Funding Opt-Out Notice.  Except as provided in this Section 6.2.4, this ARTICLE 6, Section 7.3.2
and Section 7.4.1.2 will be of no further force and effect after the Co-Funding Opt-Out Effective
Date.

6.3
Co-Detailing  Option.    If  Xencor  exercises  the  Co-Funding  Option  in  accordance  with
Section 6.2, Xencor may exercise the Co-Detailing Option on the terms set forth in this Section
6.3.

6.3.1 Co-Detailing Data Package.  

6.3.1.1

Janssen will notify Xencor of the expected date of the first Marketing
Approval of the first Licensed Product in the U.S. (as reasonably determined by Janssen) at least
[***].

6.3.1.2

Within [***] of such notice, Xencor will notify Janssen of whether it
requests  Janssen  to  prepare  and  deliver  a  data  package  with  respect  to  such  Licensed  Product  (a
“Co-Detailing  Data  Package”).    The  Co-Detailing  Data  Package  will  include  the  following
information  relating  to  the  Detailing  in  the  U.S.  of  such  Licensed  Product,  to  the  extent  it  is  in
Janssen’s possession: [***].

6.3.1.3

If  Xencor  requests  the  Co-Detailing  Data  Package,  Janssen  will
provide the Co-Detailing Data Package to Xencor within [***].  If Xencor notifies Janssen within
[***] after receipt of the Co-Detailing Data Package that it is not complete, Janssen will provide
any  missing  information  as  soon  as  practicable.    The  date  on  which  Xencor  is  in  receipt  of  a
complete Co-Detailing Data Package is referred to as the “Co-Detailing Data Package Delivery
Date.”

6.3.2 Exercise of Co-Detailing Option.  Xencor may exercise the Co-Detailing Option by
providing notice to Janssen on or before the date that is [***] before the expected date of the first
Marketing Approval of the first Licensed Product in the U.S. (as reasonably determined by Janssen
and  communicated  to  Xencor)  or,  if  later,  [***]  after  the  Co-Detailing  Data  Package  Delivery
Date.    The  date  of  such  notice  is  referred  to  as  the  “Co-Detailing  Option  Exercise  Date.”    If
Xencor does not exercise the Co-Detailing Option before such date, the Co-Detailing Option will
not apply to any Licensed Products and the Co-Detailing Option will terminate.

6.3.3 Effect of Exercise of  Co-Detailing  Option.  On  and  after  the  Co-Detailing  Option
Exercise Date, the terms and conditions set forth in this Section 6.3.3 will apply with respect to the
Detailing of Licensed Products in the U.S.:

6.3.3.1

Xencor will have the right to perform up to thirty percent (30%) of
the Detailing efforts for each Licensed Product in the U.S. for all approved Indications.  Janssen
will be responsible for performing the remainder of the Detailing efforts.  Janssen will otherwise
continue to have sole responsibility for and authority over all Commercialization activities in the
U.S., including pricing and reimbursement matters.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

40

6.3.3.2

Xencor will select its Detailing effort percentage and specify it in its
Co-Detailing Option notice provided to Janssen under Section 6.3.1.  Xencor will be required to
demonstrate to Janssen its capabilities to provide the selected level of Detailing efforts, including
employing  an  appropriate  number  of  individuals  with  the  appropriate  qualifications  (meeting  the
same criteria and standards that apply to Janssen’s own personnel).  Xencor’s capabilities will be
evaluated  and  reasonably  determined  by  Janssen.    Janssen  will  notify  Xencor  if,  after  its
evaluation,  Janssen  determines  that  Xencor  is  not  capable  of  providing  the  selected  level  of
Detailing efforts and shall explain Xencor’s deficiencies in reasonable detail.  Xencor shall have
[***]  days  to  remedy  such  deficiencies.    Xencor  will  be  responsible  for  performing  its  elected
percentage of Detailing efforts.

6.3.3.3

Janssen may terminate the Co-Detailing Option and Xencor’s rights
under this Section 6.3.3 and under the Co-Detailing Agreement in the event of the occurrence of a
Change of Control of Xencor or an assignment of this Agreement in its entirety by Xencor (other
than an assignment to an Affiliate of Xencor) by giving Xencor [***] notice at any time after the
occurrence of such event.

6.3.3.4

After the Co-Detailing Option Exercise Date, and on an annual basis
after such date, Janssen will prepare and provide to Xencor for its review and comment Janssen’s
written plan for the Detailing of and allocation of calls for Licensed Products in the U.S. (the “Co-
Detailing  Plan”).    The  Parties  will  discuss,  and  Janssen  will  consider  in  good  faith  Xencor’s
comments  on,  the  Co-Detailing  Plan  before  Janssen  finalizes  the  plan.    Janssen  will  use  the  Co-
Detailing Plan to allocate the Parties’ responsibilities for Details.

6.3.3.5

Promptly  after  the  Co-Detailing  Option  Exercise  Date,  the  Parties
will negotiate in good faith to enter into a separate co-detailing agreement with respect to the co-
Detailing of Licensed Products in the U.S. on commercially reasonable terms (the “Co-Detailing
Agreement”).  In addition to such usual and customary terms that are typically found within co-
detailing  agreements,  the  Co-Detailing  Agreement  will  include  the  terms  set  forth  below  in  this
Section 6.3.3.5:  [***]

6.3.3.6

  “Detail”  means  an  interactive  face-to-face  visit  by  a  sales
representative with a medical professional having prescribing authority or who is able to influence
prescribing decisions, within the target audience during which approved uses, safety, effectiveness,
contraindications,  side  effects,  warnings  or  other  relevant  characteristics  of  a  pharmaceutical
product are discussed in an effort to increase prescribing preferences of a pharmaceutical product
for  its  approved  uses.  Activities  conducted  by  medical  support  staff  (such  as  medical  science
liaisons), key account managers, thought leader liaisons and managed markets/reimbursement team
will not constitute Details.  E-details, activities conducted at conventions or similar gatherings and
activities performed by market development specialists, managed care account directors and other
personnel  not  performing  face-to-face  sales  calls  or  not  specifically  trained  with  respect  to  a
pharmaceutical  product  will  not  constitute  Details.  “Detailing”  means  the  act  of  performing
Details and to “Detail” mean to perform Details.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

41

ARTICLE 7
FINANCIAL PROVISIONS

Upfront  Payment.    Janssen  will  make  a  non-refundable,  non-creditable  payment  of

7.1
US$50 million to Xencor within [***] Business Days after the Effective Date.

7.2

Development and Regulatory Milestones. 

7.2.1 Milestone Payments and Events.  Janssen  will  make  the  payments  set  forth  in  the
table  below  (each,  a  “Milestone  Payment”)  to  Xencor  within  [***]  after  Xencor  delivers  an
invoice to Janssen upon the first occurrence of the corresponding milestone event set forth below
(each, a “Milestone Event”).  Janssen will notify Xencor within [***] Business Days after the first
occurrence of any of the Milestone Events.  

[***]

7.2.2 Rules regarding Determination of Milestone Payments and Events.  [***]

7.2.2.1

The  Milestone  Payments  under  this  Section  7.2  will  be  non-
refundable and non-creditable.  Each Milestone Payment shall be payable only once upon the first
occurrence  of  the  relevant  Milestone  Event  by  a  Licensed  Product,  even  if  the  Milestone  Event
occurs with respect to more than one Licensed Product, with respect to more than one Indication,
multiple  times  with  respect  to  the  same  Licensed  Product  or  multiple  times  with  respect  to  the
same Indication.

7.3

Sales Milestones.  

7.3.1 Sales Milestones if Xencor does not Exercise Co-Funding Option.  If Xencor does
not  exercise  the  Co-Funding  Option  in  accordance  with  Section  6.2,  then  this  Section  7.3.1  will
apply and Section 7.3.2 will not apply.  Janssen will notify Xencor in the applicable royalty report
delivered pursuant to Section 7.4.5 the first time the aggregate Net Sales of all Licensed Products
in  any  Calendar  Year  by  Janssen,  its  Affiliates  and  its  sublicensees  in  the  Territory  exceed  the
amounts  set  forth  in  the  table  set  forth  below  in  this  Section  7.3.1  (each,  a  “Sales  Milestone
Event”); provided, however, that Net Sales of a particular Licensed Product in a particular country
occurring after expiration of the Royalty Term for such Licensed Product in such country will be
disregarded in the calculation of Net Sales for purposes of this Section 7.3.1.  Janssen will pay to
Xencor the applicable milestone payments set forth in the table below (each, a “Sales  Milestone
Payment”) within [***] after  receipt  of  an  invoice  from  Xencor  with  respect  to  achievement  of
each Sales Milestone Event.  

Sales Milestone Event

[***]

[***]

Sales Milestone
Payment

[***]

[***]

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

42

[***]

[***]

[***]

[***]

7.3.2 Sales Milestones if Xencor Exercises Co-Funding Option.  If Xencor exercises the
Co-Funding Option in accordance with Section 6.2, Section 7.3.1 will not apply and instead this
Section  7.3.2  will  apply.    Janssen  will  notify  Xencor  in  the  applicable  royalty  report  delivered
pursuant  to  Section  7.4.5  the  first  time  the  aggregate  Net  Sales  of  all  Licensed  Products  in  any
Calendar Year by Janssen, its Affiliates and its sublicensees in the Territory exceed the amounts set
forth  in  the  table  set  forth  below  in  this  Section  7.3.2  (each,  a  “Co-Funding  Sales  Milestone
Event”); provided, however, that Net Sales of a particular Licensed Product in a particular country
occurring after expiration of the Royalty Term for such Licensed Product in such country will be
disregarded in the calculation of Net Sales for purposes of this Section 7.3.2.  Janssen will pay to
Xencor the applicable milestone payments set forth in the table below (each, a “Co-Funding Sales
Milestone Payment”) within [***]  days  after  receipt  of  an  invoice  from  Xencor  with  respect  to
achievement of each Co-Funding Sales Milestone Event.  

Co-Funding Sales Milestone Event

Co-Funding Sales
Milestone Payment

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

7.3.3 Rules regarding Determination of Sales Milestone Payments and Events.  [***]

7.4

Royalties.  

7.4.1 Royalty Rates.  

7.4.1.1

Royalty  Rates  if  Xencor  does  not  Exercise  Co-Funding  Option.    If
Xencor  does  not  exercise  the  Co-Funding  Option  in  accordance  with  Section  6.2,  this  Section
7.4.1.1  will  apply  and  Section  7.4.1.2  will  not  apply.    Subject  to  Section  7.4.2  through  Section
7.4.6,  Janssen  will  pay  to  Xencor  royalties  on  the  aggregate  Net  Sales  of  Licensed  Products  by
Janssen, its Affiliates and sublicensees during the applicable Royalty Term in the Territory during
each Calendar Year at the rates set forth in the table below in this Section 7.4.1.1.  For clarity, Net
Sales of all Licensed Products will be aggregated for purposes of calculation of royalties pursuant
to  this  Section  7.4.1.1;  provided,  however,  that  Net  Sales  of  a  particular  Licensed  Product  in  a
particular country occurring after expiration of the Royalty Term for such

43

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Licensed Product in such country will be disregarded in the calculation of royalties pursuant to this
Section  7.4.1.1.

Annual Aggregate Net Sales of Licensed Products in the Territory

Royalty Rate

For that portion of annual Net Sales of Licensed Products in the
Territory in such Calendar Year less than US$[***]

For that portion of annual Net Sales of Licensed Products in the
Territory in such Calendar Year greater than or equal to US$[***] and
less than US$[***]

For that portion of annual Net Sales of Licensed Products in the
Territory in such Calendar Year greater than or equal to US$[***]

[***]

[***]

[***]

[***]  

7.4.1.2

Royalty  Rates  if  Xencor  Exercises  Option.    If  Xencor  exercises  the
Co-Funding  Option  in  accordance  with  Section  6.2,  this  Section  7.4.1.2  will  apply  and  Section
7.4.1.1 will not apply.  Subject to Section 7.4.2 through Section 7.4.6, Janssen will pay to Xencor
royalties  on  the  aggregate  Net  Sales  of  Licensed  Products  by  Janssen,  its  Affiliates  and
sublicensees during the applicable Royalty Term in the Territory during each Calendar Year at the
rates  set  forth  in  the  table  below  in  this  Section  7.4.1.2.    For  clarity,  Net  Sales  of  all  Licensed
Products  will  be  aggregated  for  purposes  of  calculation  of  royalties  pursuant  to  this
Section 7.4.1.2; provided, however, that Net Sales of a particular Licensed Product in a particular
country occurring after expiration of the Royalty Term for such Licensed Product in such country
will be disregarded in the calculation of royalties pursuant to this Section 7.4.1.2.

Annual Aggregate Net Sales of Licensed Products in the Territory

Co-Funding
Royalty Rate

For that portion of annual Net Sales of Licensed Products in the
Territory in such Calendar Year less than US$[***]

For that portion of annual Net Sales of Licensed Products in the
Territory in such Calendar Year greater than or equal to US$[***] and
less than US$[***]

For that portion of annual Net Sales of Licensed Products in the
Territory in such Calendar Year greater than or equal to US$[***]

[***]

[***]

[***]

[***]  

44

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

7.4.2 Royalty Term.  Royalties will be paid on a Licensed Product-by-Licensed Product
and country-by-country basis, beginning with the First Commercial Sale of a Licensed Product in a
country and ending on the later of: (a) the expiration of the last-to-expire Valid Claim of a Royalty-
Bearing  Patent  with  respect  to  the  Licensed  Product  in  the  country;  (b)  the  expiration  of
Regulatory Exclusivity for the Licensed Product in the country, if any; or (c) the 12th anniversary
of  the  First  Commercial  Sale  of  such  Licensed  Product  in  such  country  (the  “Royalty  Term”).
 “Royalty-Bearing Patent” means, with respect to a Licensed Product: (i) a Xencor Patent or Joint
Patent that Covers the composition of matter or any method of use of such Licensed Product; or
(ii) a Patent [***] Controlled by Janssen or any of its Affiliates during the Term that Covers the
composition of matter of the Licensed Antibody contained in such Licensed Product.  [***]    

7.4.3 Royalty Reductions; Third Party Royalty Payments.  

7.4.3.1

Reductions  for  Loss  of  Exclusivity.    On  a  country-by-country  and
Licensed Product-by-Licensed Product basis, the royalties due to Xencor under Section 7.4.1.1 or
7.4.1.2, as applicable, will be reduced during the Royalty Term to an amount equal to [***] of the
amount otherwise payable on Net Sales of such Licensed Product in such country from and after
the  later  of  (i)  the  date  that  there  is  no  Valid  Claim  of  a  Xencor  Patent  or  Joint  Patent  in  such
country that Covers the composition of matter or any method of use of such Licensed Product or
(ii) if any Regulatory Exclusivity is granted with respect to such Licensed Product in such country,
the  date  on  which  all  such  Regulatory  Exclusivity  expires.    Such  reduction  will  be  subject  to
Section 7.4.3.3 and applied in accordance with Section 7.4.3.4.

7.4.3.2

Third Party Royalty Payments.  

(a)

Subject to Section 7.4.3.2(b) and Section 7.4.3.2(c), if Janssen (or its
Affiliate) [***] licenses under any Patents or Know-How of any Third Party for the manufacture,
use  or  sale  of  a  Licensed  Antibody  or  Licensed  Product  (other  than  with  respect  to  any  active
ingredient that is not a Licensed Antibody) in a country (each, a “Third Party License”), Janssen
will  have  the  sole  right  (but  not  the  obligation)  to  negotiate  and  obtain  any  such  license  with
respect  to  the  applicable  Licensed  Antibody  or  Licensed  Product.    For  clarity,  Xencor  retains  a
right  to  negotiate  and  obtain  licenses  under  any  Patents  or  Know-How  of  any  Third  Party  with
respect  to  Antibodies  and  products  of  Xencor  that  are  not  Licensed  Antibodies  or  Licensed
Products.

(i)

With  respect  to  such  Patents  or  Know-How  [***]  for  the
manufacture, use or sale of a Licensed Antibody or Licensed Product, Janssen will have the right
to deduct [***] of the royalties actually paid to such Third Party(ies) under the applicable Third
Party License(s) by Janssen (or by such Affiliate or, to the extent offset against royalties paid to
Janssen, its sublicensee, as applicable) with respect to sales of the applicable Licensed Product in
such country in a Calendar Quarter from the royalty payments payable by Janssen to Xencor with
respect to Net Sales of such Licensed Product in such country in such Calendar Quarter.

manufacture, use or sale of a Licensed Antibody or Licensed Product (e.g. formulation

(ii) With  respect  to  such  Patents  or  Know-How  [***]  for  the

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

45

technology  or  for  ease  of  administration),  Janssen  will  have  the  right  to  deduct  [***]  of  the
royalties  actually  paid  to  such  Third  Party(ies)  under  the  applicable  Third  Party  License(s)  by
Janssen  (or  by  such  Affiliate  or,  to  the  extent  offset  against  royalties  paid  to  Janssen,  its
sublicensee, as applicable) with respect to sales of the applicable Licensed Product in such country
in a Calendar Quarter from the royalty payments payable by Janssen to Xencor with respect to Net
Sales of such Licensed Product in such country in such Calendar Quarter.  

applied in accordance with Section 7.4.3.4.

(iii)

Such  deductions  will  be  subject  to  Section  7.4.3.3  and

(b)

If a Party becomes aware that it is necessary to obtain one or more
licenses  under  any  Patents  or  Know-How  of  any  Third  Party  in  order  to  practice  any  Xencor
Binding  Domain  for  a  Licensed  Antibody  (including  for  a  Licensed  Antibody  contained  in  a
Licensed Product) in a country, such Party will promptly notify the other Party.  Xencor will have
the  sole  responsibility  and  right  to  negotiate  and  obtain  such  license,  provided  that  such  license
does not impose any liability, restriction or obligation on Janssen (beyond the terms and conditions
in  connection  with  the  practice  of  such  license)  without  Janssen’s  consent.    Such  Third  Party’s
Patents  or  Know-How,  as  applicable,  will  be  included  in  the  Xencor  Research  Patents,  Xencor
Patents  or  Xencor  Research  Know-How,  as  applicable.    Xencor  will  be  responsible  for  all
payments under such license.

(c)

If a Party becomes aware that it is necessary to obtain one or more
licenses  under  any  Patents  or  Know-How  of  any  Third  Party  in  order  to  practice  any  Janssen
Binding  Domain  for  a  Licensed  Antibody  (including  for  a  Licensed  Antibody  contained  in  a
Licensed Product) in a country, such Party will promptly notify the other Party.  Janssen will have
the  sole  responsibility  and  right  to  negotiate  and  obtain  such  license,  provided  that  such  license
does not impose any liability, restriction or obligation on Xencor (beyond the terms and conditions
in  connection  with  the  practice  of  such  license)  without  Xencor’s  consent.    Such  Third  Party’s
Patents or Know-How, as applicable, will be included in the Janssen Research Patents or Janssen
Research  Know-How,  as  applicable.    Janssen  will  be  responsible  for  all  payments  under  such
license.

7.4.3.3

Royalty Floor.  In  no  event  will  the  total  reductions  and  deductions
under Sections 7.4.3.1 and 7.4.3.2 reduce the royalties payable to Xencor under Section 7.4.1.1 or
7.4.1.2, as applicable, with respect to a given Licensed Product in a given country in any Calendar
Quarter by more than [***] of the amount that would otherwise be payable if such reductions and
deductions were not made.

7.4.3.4

Royalty  Calculation.    If  the  royalties  payable  with  respect  to  Net
Sales  of  a  Licensed  Product  in  a  country  in  a  Calendar  Quarter  are  subject  to  reduction  under
Section 7.4.3.1 or deductions under Section 7.4.3.2, the royalties payable with respect to such Net
Sales will be calculated as follows:

First, determine the aggregate Net Sales of such Licensed Product in
such country during such Calendar Quarter that occurred during the applicable Royalty Term (the
“Quarterly Net Sales”).

(a)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

46

Second,  determine  the  Effective  Royalty  Rate  for  the  applicable
Calendar  Quarter.    The  “Effective  Royalty  Rate”  means,  with  respect  to  a  particular  Calendar
Quarter, the amount (expressed as a percentage) equal to A ÷ B (i.e., A divided by B), where:

(b)

A  =  Aggregate  amount  of  royalties  payable  under  Section
7.4.1.1 or 7.4.1.2, as applicable, applying the relevant royalty tiers, on aggregate annual Net Sales
of Licensed Products in the Territory during such Calendar Quarter before applying any reductions
under Section 7.4.3.1 or deductions under Section 7.4.3.2; and

(i)

B = Aggregate annual Net Sales of Licensed Products in the
Territory  during  such  Calendar  Quarter  (excluding  any  Net  Sales  of  such  Licensed  Products  that
occurred after the expiration of the applicable Royalty Term).

(ii)

(c)

Third, multiply the Effective Royalty Rate by the Net Sales of such
Licensed  Product  in  such  country  in  such  Calendar  Quarter  that  occurred  during  the  applicable
Royalty Term to determine the royalties that would have been payable on the Quarterly Net Sales
under  Section  7.4.1.1  or  7.4.1.2,  as  applicable,  if  no  reduction  or  deduction  applied  under
Section 7.4.3.1 or 7.4.3.2 (the “Unadjusted Quarterly Royalties” for such country).

Last, reduce the Unadjusted Quarterly Royalties for such country to
the  amount  specified  in  Section  7.4.3.1  and  by  the  amount(s)  specified  in  Section  7.4.3.2,  as
applicable, in each case, to the extent allowable by Section 7.4.3.3.

(d)

7.4.4 Expiration of Royalty Term.  Upon the expiration of the Royalty Term with respect
to a Licensed Product in a country, Xencor hereby grants to Janssen a perpetual, irrevocable, non-
exclusive, fully-paid and royalty-free right and license, with the right to grant sublicenses, under
the Xencor Intellectual Property to Exploit such Licensed Product in the Field in such country. For
clarity,  after  the  Royalty  Term  expires  with  respect  to  a  Licensed  Product  in  a  country,  the
calculation of annual aggregate Net Sales of such Licensed Product in the Territory will exclude
sales of such Licensed Product in such country.

7.4.5 Royalty Reports and Payments.  Commencing with the First Commercial Sale of a
Licensed Product by Janssen or its Affiliates or sublicensees in the Territory, royalty payments are
due  and  payable  [***] after  the  end  of  each  Calendar  Quarter  in  which  royalties  are  applicable.
 Each payment of royalties under this Agreement will be accompanied with a report setting forth,
by  region  (which  regions  will  be  the  U.S.,  Canada,  Japan,  China,  each  of  the  Major  European
Countries and all other countries in the Territory), the Net Sales, the applicable royalty rate and the
amount of royalty payment due on such Net Sales.  Additionally, Janssen will provide Xencor with
a non-binding estimate of each royalty payment for each Calendar Quarter within [***] after  the
end  of  such  Calendar  Quarter.  All  reports  delivered  by  Janssen  under  this  Section  will  be
Confidential Information of Janssen.  

7.4.6 Royalty Conditions.  All royalties due to Xencor under this Section 7.4 are subject
to  the  following  conditions:  (a)  only  one  royalty  will  be  due  with  respect  to  the  same  unit  of
Licensed Product; and (b) no royalties will be due upon the sale or other transfer among Janssen or
its Affiliates, but in such cases the royalty will be due and calculated upon Janssen’s or its

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

47

Affiliate’s Net Sales to the first independent Third Party, and distributors of Janssen selling
Licensed Product that are not otherwise sublicensees will not, for this purpose, be deemed to be
sublicensees of Janssen and will instead be considered as independent Third Parties.

7.5

Payment Terms.  

7.5.1 Payment Instruction.  All payments to be made by a Party hereunder will be made
in  Dollars  by  electronic  funds  transfer  to  the  bank  account  as  will  be  designated  by  the  Party
receiving the payment.

7.5.2 Exchange Rate.  If any amounts that are relevant to the determination of amounts to
be  paid  under  this  Agreement  or  any  calculations  to  be  performed  under  this  Agreement  are
received or paid or initially reported in a currency other than U.S. Dollars, then such amounts will
be converted to their U.S. Dollar equivalent as follows:  

7.5.2.1

Janssen  will  notify  Xencor  in  writing  of  Johnson  &  Johnson’s
Currency Hedge Rate for a given Calendar Year in advance of such Calendar Year, within [***]
after  the  Currency  Hedge  Rate(s)  are  available  from  the  GTSC  or  its  Affiliates,  which  is
customarily at the end of November of the preceding Calendar Year.

7.5.2.2

Then:  (i)  the  Currency  Hedge  Rate(s)  as  provided  in  the  notice  to
Xencor  will  remain  constant  throughout  the  applicable  Calendar  Year;  and  (ii)  Janssen  will  use
such Currency Hedge Rate(s) to convert non-U.S. Dollar amounts to U.S. Dollars for the purpose
of calculating Net Sales, royalties and the achievement of Sales Milestone Events or Co-Funding
Sales Milestone Events, as applicable, for each Calendar Quarter in the applicable Calendar Year.

7.6

Records; Audits.

7.6.1 Records.  Each  Party  will  keep,  and  cause  its  Affiliates  and  sublicensees  to  keep,
complete and accurate records of the items underlying Shared Development Costs, Net Sales and
any  other  elements  required  to  prepare  the  reports  or  calculate  payments  required  by  under  this
Agreement. Such records must be retained for a period of [***] following  the  relevant  reporting
period.

7.6.2 Audits.  

7.6.2.1

Each  Party  will  have  the  right  at  its  own  expense  to  have  an
independent, certified public accountant of nationally recognized standing, selected by such Party
and  reasonably  acceptable  to  the  other  Party,  review  any  records  of  the  other  Party  and  its
Affiliates  that  are  required  to  be  kept  pursuant  to  Section  7.6.1  in  the  location(s)  where  such
records  are  maintained  by  the  other  Party  or  its  Affiliates  upon  prior  written  notice  and  during
normal business hours and under obligations of confidence, for the sole purpose of verifying the
basis and accuracy of payments made under this Agreement, within the prior [***] period.  Audits
may not be conducted by a Party under this Section more than once every [***], and an audit of
the records relating to a particular Calendar Year may be conducted not more than once.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

48

7.6.2.2

The  report  of  the  independent  certified  public  accountant  will  be
shared with the audited Party before distribution to the auditing Party so that the audited Party can
provide  the  independent  public  accountant  with  justifying  remarks  for  inclusion  in  the  report
before sharing the conclusions of such independent public audit with the auditing Party.  The final
audit report will be shared with the auditing and audited Party at the same time and will specify
whether  the  amounts  paid  to  the  auditing  Party  during  the  audited  period  were  correct  or,  if
incorrect, the amount of any underpayment or overpayment.  The audit report will only contain the
information relevant to support the statement as to whether the amounts due under this Agreement
were  calculated  and  paid  accurately  and  will  not  include  any  other  confidential  information  (or
other  additional  information  that  is  ordinarily  not  included  in  the  reports  to  the  auditing  Party)
disclosed to the auditor during the course of the audit.

7.6.2.3

If the review of such records reveals that the audited Party has failed
to accurately report information pursuant to the relevant provisions of this Agreement or make any
payment (or portion thereof) required under this Agreement, then the audited Party will pay, within
[***]  days  after  receipt  of  the  final  audit  report  by  the  audited  Party,  to  the  auditing  Party  any
underpaid  amounts  due  under  this  Agreement.    If  any  such  discrepancies  resulted  in  an
underpayment of amounts due under this Agreement greater than [***] of the amounts actually due
for  the  applicable  audit  period,  the  audited  Party  will  pay  all  reasonable  costs  incurred  in
conducting  such  review.    If  the  audited  Party  disagrees  with  the  findings  of  the  audit  report,  the
Parties will first seek to resolve the matter between themselves, and in the event they fail to reach
agreement, the dispute resolution provisions set forth in ARTICLE 15 will apply.

7.7

Taxes.  

7.7.1 Withholding.

7.7.1.1

Janssen  will  make  all  payments  to  Xencor  under  this  Agreement
without  deduction  or  withholding  for  Taxes  except  to  the  extent  that  any  such  deduction  or
withholding is required by law in effect at the time of payment.

7.7.1.2

Any  Tax  required  to  be  withheld  on  amounts  payable  under  this
Agreement  will  be  paid  by  Janssen  on  behalf  of  Xencor  to  the  appropriate  Governmental
Authority,  and  Janssen  will  furnish  Xencor  with  proof  of  payment  of  such  Tax.  Any  such  Tax
required  to  be  withheld  will  be  an  expense  of  and  borne  by  Xencor.  If  any  such  Tax  is  assessed
against  and  paid  by  Janssen,  then  Xencor  will  indemnify  and  hold  harmless  Janssen  from  and
against such Tax.

7.7.1.3

Janssen and Xencor will cooperate with respect to all documentation
required by any taxing  authority  or  reasonably  requested  by  Janssen  to  secure a reduction in the
rate  of  applicable  withholding  Taxes.    On  the  date  of  execution  of  this  Agreement,  Xencor  will
deliver to Janssen an accurate and complete Internal Revenue Service Form W-9.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

49

7.7.2

Indirect Taxes.  Amounts  payable  under  this  Agreement  do  not  include  any  sales,
use, excise, value added or other applicable taxes, tariffs or duties. If any taxing authority imposes
a  VAT,  GST,  sales,  use,  service,  consumption,  business  or  similar  Tax  with  respect  to  the  work
undertaken  under  this  Agreement,  then  Janssen  agrees  to  pay  that  amount  if  specified  in  a  valid
invoice or supply exemption documentation. For avoidance of doubt, Xencor will not be entitled to
pass  on  to  Janssen,  and  Janssen  will  not  be  obligated  to  pay  or  bear,  any  Tax  that  is  based  on
Xencor’s  real,  personal  or  intangible  property  (whether  owned  or  leased),  corporate  structure,
franchise,  continuing  business  operations,  income,  gross  receipts,  capital  stock,  net  worth  or
imposed  with  respect  to  Xencor’s  engagement  of  employees  or  independent  contractors  or  that
Xencor  incurs  upon  subcontracting  any  work  hereunder,  in  whole  or  in  part,  to  any  affiliated  or
non-affiliated third party. Xencor is solely responsible, to the extent required by applicable law, for
identifying,  billing,  and  collecting  the  Taxes  payable  by  Janssen  in  all  relevant  federal,  state,
county, municipal and other taxing jurisdictions and for filing all required tax returns in a timely
manner.  To  the  extent  that  Xencor  does  not  provide  Janssen  a  valid  invoice  (i.e.,  an  invoice
compliant with this Agreement and the rules and regulations of the jurisdiction of both Xencor and
Janssen,  including  separate  identification  of  the  Tax  where  legally  required),  Xencor  shall  be
responsible for any penalty resulting directly from such noncompliance. The Parties will cooperate
in good faith to minimize Taxes to the extent legally permissible.

ARTICLE 8
LICENSE GRANTS; EXCLUSIVITY

8.1

Grants.  

8.1.1 Licenses to Janssen.  

8.1.1.1

Research  License.    Subject  to  the  terms  and  conditions  of  this
Agreement, Xencor hereby grants, on behalf of itself and its Affiliates, to Janssen during the Term
an  exclusive  (even  as  to  Xencor  and  its  Affiliates,  except  with  respect  to  performance  of  its
obligations under this Agreement), royalty-bearing, non-transferable (except as provided in Section
16.1),  sublicenseable  (solely  as  provided  in  Section  8.2)  license,  under  the  Xencor  Research
Intellectual Property, to Research Licensed Antibodies in the Field in the Territory (the “Research
License”).

8.1.1.2

Commercial  License.    Subject  to  the  terms  and  conditions  of  this
Agreement, Xencor hereby grants, on behalf of itself and its Affiliates, to Janssen during the Term
an exclusive (even as to Xencor), royalty-bearing, non-transferable (except as provided in Section
16.1),  sublicenseable  (solely  as  provided  in  Section  8.2)  license,  under  the  Xencor  Intellectual
Property, to Exploit (but not to Research) Licensed Antibodies and Licensed Products in the Field
in the Territory.  Janssen shall not Develop, Manufacture or Commercialize during the Term (i) any
Licensed  Antibody  that  is  Researched  using  Know-How  or  Patents  Controlled  by  Xencor  or  its
Affiliates  that  are  not  licensed  to  Janssen  pursuant  to  the  Research  License  or  (ii)  any  Licensed
Product containing a Licensed Antibody described in clause (i).

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

50

8.1.1.3

Other  Antibodies  and  APIs.    Notwithstanding  anything  to  the
contrary,  the  licenses  granted  by  Xencor  to  Janssen  under  this  Section  8.1.1  with  respect  to
Licensed Products do not grant any right or license under any Patent that Covers any composition
of matter of any Antibodies or other active ingredients other than Licensed Antibodies.

8.1.2 License to Xencor.  Subject to the terms and conditions of this Agreement, Janssen,
on behalf of itself and its Affiliates, hereby grants to Xencor, during the Research Program Term, a
non-exclusive,  royalty-free,  non-transferable  (except  as  permitted  under  in  Section  16.1),
sublicensable (solely as provided in Section 8.2) license under (a) the Xencor Intellectual Property
licensed to Janssen under Section 8.1.1 and (b) the Janssen Research Intellectual Property, in each
case ((a) and (b)), solely to the extent necessary for Xencor to perform its obligations under this
Agreement with respect to the Research Program.

8.1.3 Cross-License.  

8.1.3.1

Subject to the terms and conditions of this Agreement (including the
restrictions  set  forth  in  Section  3.4.3  and  Section  8.4  and  the  confidentiality  obligations  under
ARTICLE 10), Xencor hereby grants to Janssen a non-exclusive, worldwide, irrevocable, royalty-
free, perpetual license to use for all purposes any technical Know-How Controlled by Xencor and
disclosed  to  Janssen  pursuant  to  this  Agreement;  provided,  however,  that  such  license  does  not
include  (i)  a  grant  of  any  rights  to  Janssen  for  any  Exploitation  of  any  Licensed  Antibody  or
Licensed  Product,  (ii)  a  right  to  practice  any  Patents  owned  or  Controlled  by  Xencor  or  its
Affiliates, (iii) a right to practice any Xencor Platform Technology, (iv) a right to practice Know-
How  embodied  by  Materials  supplied  by  Xencor  to  Janssen,  or  (v)  a  right  to  use  any  Materials
provided by Xencor.  For clarity, this does not give Janssen the right to disclose any Confidential
Information of Xencor.

8.1.3.2

Subject to the terms and conditions of this Agreement (including the
restrictions  set  forth  in  Section  3.4.3  and  Section  8.4  and  the  confidentiality  obligations  under
ARTICLE 10), Janssen hereby grants to Xencor a non-exclusive, worldwide, irrevocable, royalty-
free, perpetual license to use for all purposes any technical Know-How Controlled by Janssen and
disclosed  to  Xencor  pursuant  to  this  Agreement;  provided,  however,  that  such  license  does  not
include  (i)  a  grant  of  any  rights  to  Xencor  for  any  Exploitation  of  any  Licensed  Antibody  or
Licensed  Product,  (ii)  a  right  to  practice  any  Patents  owned  or  Controlled  by  Janssen  or  its
Affiliates,  (iii)  a  right  to  practice  Know-How  embodied  by  Materials  supplied  by  Janssen  to
Xencor,  or  (iv)  a  right  to  use  any  Materials  provided  by  Janssen.    For  clarity,  this  does  not  give
Xencor the right to disclose any Confidential Information of Janssen.

8.1.4 License  to  Assigned  Inventions.    Subject  to  the  terms  and  conditions  of  this
Agreement  (including  the  restrictions  set  forth  in  Section  3.4.3  and  Section  8.4  and  the
confidentiality obligations under ARTICLE 10), Xencor hereby grants to Janssen a non-exclusive,
worldwide,  irrevocable,  royalty-free,  perpetual  license  to  use  for  all  purposes  any  Janssen
Assigned Invention; provided, however, that such license does not include (i) a grant of any rights
to Janssen for the Exploitation of any Licensed Antibody or Licensed Product or (ii) a grant of any
rights to practice, other than Janssen Assigned Inventions, any Patents or Know-

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

51

How owned or Controlled by Xencor or its Affiliates.  “Janssen Assigned Inventions” means the
Inventions (and Patents filed thereon) that are assigned by Janssen to Xencor pursuant to Section
9.2.2.2(a)  but  not  including  those  Inventions  (and  Patents  filed  thereon)  primarily  directed  to  an
improvement of a Xencor Binding Domain.  

8.1.5 Affiliates.  If  any of the Patents  or  Know-How  licensed  by  one  Party  to  the  other
Party pursuant to this Section 8.1 is Controlled by an Affiliate of the licensing Party, the licensing
Party will procure that such Affiliate grants the licenses to the other Party in accordance with this
Section 8.1.

8.2

Sublicensing.  

8.2.1 Sublicenses by Janssen.  Janssen may grant and authorize sublicenses of any of the
rights  granted  to  it  by  Xencor  under  Section  8.1.1  and  Section  8.1.3.2  without  the  consent  of
Xencor  to  one  or  more  of  its  Affiliates  or  to  one  or  more  Third  Parties  through  multiple  tiers.
  Janssen  may  grant  and  authorize  sublicenses  of  any  of  the  rights  granted  to  it  by  Xencor  under
Section 8.1.3.1  without  the  consent  of  Xencor  to  one  or  more  of  its  Affiliates.    Janssen  may  not
grant or authorize sublicenses of any of the rights granted to it by Xencor under Section 8.1.3.1 to
any  Third  Party  without  the  prior  written  consent  of  Xencor,  which  will  not  be  unreasonably
withheld, delayed or conditioned.

8.2.2 Sublicenses by Xencor.  Xencor may grant and authorize sublicenses of any of the
rights granted to it by Janssen under Section 8.1 without the consent of Janssen to one or more of
its Affiliates.  Xencor may not grant or authorize sublicenses of any of the rights granted to it by
Janssen under Section 8.1 to any Third Party without the prior written consent of Janssen, which
will not be unreasonably withheld, delayed or conditioned.

8.2.3 Sublicense Requirements.  Each sublicense will be pursuant to a written agreement
that is subject to and consistent with the terms and conditions of this Agreement. The sublicensing
Party will remain directly responsible and fully liable to the other Party for the performance of the
sublicensee  in  accordance  with  this  Agreement.  The  sublicensing  Party  will  provide  to  the  other
Party a copy of each sublicense agreement within [***] following the execution thereof, provided
that the sublicensing Party will be permitted to redact commercially sensitive terms to the extent
such terms are not necessary for the other Party to confirm compliance with this Agreement.

No Implied Licenses.  Neither Party grants to the other Party any rights or licenses in or
8.3
to any Know-How, Patents or other intellectual property rights, whether by implication, estoppel,
or otherwise, other than the rights and licenses that are expressly granted under this Agreement.

8.4

Exclusivity.  

8.4.1 Definitions.

8.4.1.1

“Bispecific Competing Product” means [***].

8.4.1.2

“Competing Product” means [***].

52

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

8.4.1.3

“Derived Competing Product” means [***].  

8.4.1.4

“First  Exclusivity  Period”  means  the  period  beginning  on  the

Effective Date and ending on the earlier of (i) the last day of the Term or (ii) [***].

8.4.1.5

“Scale-Up”  means,  with  respect  to  a  Licensed  Product,  that  such
Licensed Product has been successfully produced by or on behalf of Janssen or its Affiliates in a
[***] that is at least [***] in volume.  

8.4.1.6

“Second Exclusivity Period” means the period beginning [***] and

ending on the earlier of (i) the last day of the Term or (ii) [***].

8.4.1.7

[***].

8.4.2 First Exclusivity Period.  During the First Exclusivity Period, neither Party nor any
of its Affiliates will conduct, directly or indirectly, or collaborate with, license or otherwise grant
any  rights  to  any  Third  Party  to  conduct,  any  Research,  non-clinical  or  clinical  Development,
Manufacture or Commercialization of any Competing Product in the Field in the Territory, except
for use of Competing Products as research tools.

8.4.3 Second Exclusivity Period. During the Second Exclusivity Period, neither Party nor
any  of  its  Affiliates  will  conduct,  directly  or  indirectly,  or  collaborate  with,  license  or  otherwise
grant any rights to any Third Party to conduct, any clinical Development (or activities to scale-up
for  clinical  Development),  Manufacture  or  Commercialization  of  any  Bispecific  Competing
Product  in  the  Field  in  the  Territory.    For  clarity,  for  all  purposes  of  this  Section  8.4.3,  “clinical
Development” excludes Research.

8.4.4 Derived  Competing  Products.    During  the  Term,  neither  Xencor  nor  any  of  its
Affiliates  will  conduct,  directly  or  indirectly,  or  collaborate  with,  license  or  otherwise  grant  any
rights  to  any  Third  Party  to  conduct,  any  Research,  non-clinical  or  clinical  Development,
Manufacture or Commercialization of any Derived Competing Product in the Field in the Territory.

8.4.5 Effect of Xencor Change of Control.   

8.4.5.1

If, on the date of consummation of a Change of Control of Xencor,
the  Acquirer  of  Xencor  in  such  Change  of  Control  transaction  is  conducting  Research,
Development, Manufacture  or  Commercialization  activities  with  respect  to  a  Competing Product
that  would  otherwise  be  prohibited  under  Section  8.4.2  (an  “Acquirer  Competing  Product”),
[***].

8.4.5.2

[***].  

8.4.5.3

53

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

 
Except  as  provided  in  Section  8.4.5.3(b),  the  restrictions  in  Section
3.4.3.2 will apply to an Acquirer of Xencor and its Affiliates, and will continue to apply to Xencor
and its other Affiliates, after the consummation of a Change of Control of Xencor.

(a)

(b)

After  the  consummation  of  a  Change  of  Control  of  Xencor,  the
restrictions  in  Section  3.4.3.2  will  not  apply  to  the  Research,  Development,  Manufacture  or
Commercialization  by  the  Acquirer  of  an  Acquirer  Competing  Product  containing  a  Janssen
Binding Domain so long as (i) neither Xencor (nor any Affiliate of Xencor that was an Affiliate of
Xencor immediately prior to such Change of Control) disclosed or otherwise provided the Janssen
Binding Domain to the Acquirer and (ii) [***].

8.4.5.4

For clarity, the restrictions in Section 8.4.4 will apply to an Acquirer
of Xencor and its Affiliates, and will continue to apply to Xencor and its other Affiliates, after the
consummation of a Change of Control of Xencor.

8.4.6 Acquisition of Competing Products.

  If either Party or any of its Affiliates acquires rights to any Competing Product as the result of a
merger, acquisition, combination or similar transaction with, of or by a Third Party, and as of the
date  of  consummation  of  such  transaction,  there  are  on-going  activities  with  respect  to  such
Competing  Product  that  are  prohibited  under  Section  8.4.2  or  Section  8.4.3  (in  each  case,  after
giving  effect  to  Section  8.4.5),  then  the  Party  who  acquired  (or  whose  Affiliate  acquired)  such
rights  to  such  Competing  Product  (“Acquiring  Party”)  will,  within  [***]  after  the  date  of
consummation  of  such  transaction,  notify  the  other  Party  in  writing  whether  it  (or  its  Affiliate)
will:  

Competing Product within [***] after the consummation of such transaction; or

(a)

enter  into  a  definitive  agreement  with  a  Third  Party  to  divest  such

discontinue or terminate its activities with respect to such Competing
Product  no  later  than  [***] after  the  closing  of  such  transaction,  until  the  expiration  of  the  First
Exclusivity Period or Second Exclusivity Period, as applicable.

(b)

During any period in which the Acquiring Party is permitted to continue Researching, Developing,
Manufacturing or Commercializing such Competing Product in accordance with clause (a) or (b)
above, the applicable prohibition under Section 8.4.2 or Section 8.4.3 will not apply with respect to
such Competing Product and the Acquiring Party will [***].

8.4.7 Effect  of  Transfer  of  Xencor  Intellectual  Property.  Neither  Xencor  nor  any  of  its
Affiliates will sell or otherwise transfer the ownership of any Xencor Intellectual Property to any
Third Party (including through a sale or ownership transfer by an Affiliate of Xencor that Controls
such  intellectual  property)  without  imposing  on  such  Third  Party  the  restrictions  set  forth  in
Section  8.4.2  solely  with  respect  to  its  use  of  such  Xencor  Intellectual  Property.   A  Change  of
Control of Xencor or its Affiliates is not deemed to constitute, by itself, a sale or transfer of Xencor
Intellectual Property under this Section 8.4.7.  

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

54

ARTICLE 9
INTELLECTUAL PROPERTY

9.1
Patent  Representatives.    Each  Party  will  designate  a  patent  attorney  or  agent  as  its
contact  to  coordinate  with  the  other  Party  the  filing,  prosecution  and  maintenance  of  Patents  as
provided in this Article (the “Patent Representative”).

9.2

Inventions.  

9.2.1

Inventorship.    The  Parties  agree  that  ownership  of  inventions  conceived  or  first
reduced  to  practice  in  the  course  of  activities  performed  under  this  Agreement,  together  with  all
intellectual property  rights  therein  (collectively,  “Inventions”)  will  be  consistent  in  the  Territory
with ownership as determined by application of U.S. patent Laws pertaining to inventorship.  In no
event will either Party be liable to the other Party for compensation to any inventors for Inventions
conceived  or  first  reduced  to  practice  by  director(s),  officer(s)  or  employee(s)  of  the  other  Party
regardless of which Party has ownership rights to such Inventions pursuant to this Section.

9.2.2 Ownership.  

9.2.2.1

Subject to Section 9.2.2.2, all Inventions conceived or first reduced to
practice  solely  by  or  on  behalf  of  Janssen  will  be  solely  owned  by  Janssen,  all  Inventions
conceived  or  first  reduced  to  practice  solely  by  or  on  behalf  of  Xencor  will  be  solely  owned  by
Xencor, and all Inventions conceived or first reduced to practice jointly by or on behalf of Janssen
and Xencor will be jointly owned by Janssen and Xencor.

9.2.2.2

Notwithstanding  Section  9.2.2.1,  the  ownership  of  the  following
Inventions  will  be  as  follows,  regardless  of  the  inventorship  of  such  Inventions  between  the
Parties:

(a)
owned or jointly owned by Janssen that: [***].

Xencor  will  solely  own  any  Invention  that  would  otherwise  be

(b)
owned or jointly owned by Xencor that: [***].

Janssen  will  solely  own  any  Invention  that  would  otherwise  be

Each Party hereby makes all assignments necessary to accomplish the foregoing ownership.    

9.2.2.3

In  the  case  of  Inventions  jointly  owned  by  Janssen  and  Xencor
(“Joint  Inventions”),  and  any  Patents  that  claim  or  disclose  such  Joint  Inventions  (“Joint
Patents”),  each Party will own  an  equal  and  undivided  interest  in  the  Joint  Inventions and Joint
Patents,  with  the  right  to  practice,  license  and  exploit  the  Joint  Inventions  and  Joint  Patents,
without the duty or accounting or seeking consent from the other Party, subject to any exclusive
licenses granted herein and in a manner not inconsistent with this Agreement.

9.2.3 Disclosure.  Each  Party  will,  and  will  cause  its  Affiliates  to,  promptly  disclose  to

the other Party in writing, the conception, development or reduction to practice of: (a) any

55

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Invention that is conceived or first reduced to practice during the Research Program Term; and (b)
any Invention that is conceived or first reduced to practice during the Term that would be the
subject of a [***].  Each Party will cause its Affiliates, employees, directors and officers to assign
to such Party, such Person’s right, title and interest in and to any such Inventions, and intellectual
property rights therein, as is necessary to enable such Party to fully effect the ownership of such
Inventions, and intellectual property rights therein, as provided for in Section 9.2.2.  Each Party
will include provisions that effect the intent of this ARTICLE 9 in its relevant agreements with
Third Party sublicensees and Third Party contractors performing obligations on its behalf pursuant
to this Agreement.  Each Party will, and will cause its Affiliates, employees, directors, and officers,
Third Party contractors and Third Party sublicensees, in each case to cooperate with the other Party
and take all reasonable additional actions and execute such agreements, instruments and
documents as may be reasonably required to perfect the other Party’s right, title and interest in and
to Inventions, and intellectual property rights therein, as set forth in this Section 9.2.  Regardless of
the foregoing and any provision of this Section 9.2, a Party engaging a CRO (or clinical trial site)
for the conduct of Clinical Studies or a CMO may agree to such terms as to the ownership of
intellectual property, including Patents, as is reasonable under the circumstances and/or customary.

9.3

Prosecution of Patents.  

9.3.1 Xencor Patents.  

9.3.1.1

The Parties recognize that it is their shared goal to obtain the broadest
patent  coverage  available  with  regard  to  the  Xencor  Patents  and  Xencor  Research  Patents,
consistent with the goal of obtaining patents that are valid and enforceable as against Third Parties.
 Janssen acknowledges that there may be multiple licensees of certain Xencor Patents or Xencor
Research Patents which are included in Xencor Platform Technology and that Xencor has the right
to determine how best to conduct patent prosecution of such Xencor Patents or Xencor Research
Patents,  as  applicable,  considering  in  good  faith  the  interests  of  all  such  licensees  to  the  extent
obligated to do so.

interferences,  oppositions, 

9.3.1.2
file,  prosecute 

Xencor  has  the  right  using  patent  counsel  selected  by  Xencor  to
prepare, 
reissue  proceedings,
(including  any 
reexaminations  and  similar  proceedings)  and  maintain  (collectively,  “Prosecution”  or  to
“Prosecute”)  [***]    Xencor  will  take  such  reasonable  acts  in  connection  therewith  as  Xencor
deems appropriate, provided Xencor considers in good faith any comments of Janssen and is acting
in good faith to obtain and maintain [***] effective for market exclusivity of Licensed Products.
 As of the Effective Date, Xencor uses certain external patent counsel to Prosecute [***].  In the
event that such external patent counsel are effectively replaced by Xencor, the replacement patent
counsel must be reasonably acceptable to Janssen.  

9.3.1.3

Section  9.3.1.2  notwithstanding,  with  respect  to  [***],  Xencor  will
promptly  provide  Janssen  with  copies  of  all  correspondence  to  or  from  the  USPTO,  EPO  and
equivalent  patent  offices  in  foreign  jurisdictions,  relating  to  such  [***].    Xencor  will  reasonably
cooperate with Janssen in Prosecuting the [***], and in such case, in the event of any disagreement
between Xencor and Janssen regarding the Prosecution of [***] under this Section:

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

56

(a) after the earliest Candidate Selection Date, Janssen will have final decision-making authority
and Xencor will (and will cause its outside counsel to) Prosecute [***] as  instructed  by  Janssen,
including  in  countries  requested  by  Janssen  to  the  extent  permitted  by  applicable  Law;  and  (b)
prior to [***], Xencor will have final decision-making authority.  

9.3.1.4

If  Xencor,  prior  or  subsequent  to  filing  any  Patent  that  would
constitute [***], elects not to Prosecute such Patent, Xencor will give Janssen notice thereof within
a reasonable period prior to allowing such Patent to lapse or become abandoned or unenforceable,
and  Janssen  will  thereafter  have  the  right,  but  not  the  obligation,  to  Prosecute  such  [***].    If
Janssen  assumes  responsibility  for  such  [***]  pursuant  to  this  Section,  Xencor  will  reasonably
cooperate  with  Janssen  in  Prosecuting  such  Patents  and,  in  such  case,  in  the  event  of  any
disagreement between Xencor and Janssen regarding the Prosecution of [***] under this Section,
Janssen  will  have  final  decision-making  authority  and  Xencor  will  (and  will  cause  its  outside
counsel to) Prosecute [***] as instructed by Janssen, including in countries requested by Janssen to
the extent permitted by applicable Law.

9.3.1.5

As between the Parties, Xencor will be solely responsible for all costs
and expenses Xencor incurs in connection with the Prosecution of [***].  Janssen will reimburse
Xencor  for  all  reasonable  out-of-pocket  costs  incurred  by  Xencor  in  connection  with  the
Prosecution  of  the  [***];  provided,  however,  that  at  any  time  Janssen  may  elect  not  to  be
responsible for such costs, in which case such applicable [***] will no longer be included in any
licenses granted to Janssen hereunder.

9.3.1.6

The  Parties  understand  that  certain  grounds  for  rejection  in  the
United States may be cured or remedied by assignment of a Patent from one Party to another to
allow for the filing of terminal disclaimers.  In the case of [***] Controlled by Janssen for which
such assignment can provide such remedy, the Parties agree to discuss in good faith the best course
of action, including the assignment of [***] Controlled by Janssen to vest ownership in one or both
Parties  to  remedy  such  rejection.    If,  after  discussion,  the  Parties  do  not  agree  on  the  course  of
action  to  take,  either  Party  may  refer  the  matter  to  the  Executive  Officers  for  resolution.    Such
Executive Officers shall endeavor to meet promptly to discuss the matter.  If the Executive Officers
do not reach consensus on such matter within [***] after such matter is referred to them, then (i) in
the case of assignment of a [***], Xencor will have final say, and (ii) in the case of assignment of a
[***] Controlled by Janssen, Janssen will have the final say.

9.3.1.7

It  is  the  intention  of  the  Parties  that  this  Agreement  is  a  “joint
research agreement” as that phrase is defined in Public Law 108-53 (the “Create Act”). If Janssen
or Xencor intends to overcome a rejection of a claimed invention in a [***] Controlled by Janssen
pursuant to the provisions of the Create Act under this Agreement, such Party shall first obtain the
prior  written  consent  of  the  other  Party.  Following  receipt  of  such  written  consent,  Xencor  and
Janssen  shall  limit  any  amendment  to  the  specification  or  statement  to  the  patent  office  with
respect to this Agreement to that which is strictly required by 35 USC § 102(c) and the rules and
regulations promulgated thereunder and which is consistent with the terms and conditions of this
Agreement.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

57

9.3.2

Janssen Patents.  Janssen  will  be  solely  responsible  for  the  Prosecution  of  and  the

cost for [***].

9.3.3

Joint Patents.

9.3.3.1

[***]

9.3.3.2

[***]  

9.3.3.3

Joint Patent Costs. [***]

9.3.4 Cooperation.  Each Party agrees to reasonably cooperate with the other with respect
to  the  Prosecution  of  Patents  pursuant  to  this  Section  9.3.   At  the  request  of  the  other  Party,  the
Party  responsible  for  Prosecuting  a  Patent  will  make  reasonable  efforts  to  separately  prosecute
subject matter solely related to [***] separate from other subject matter which may be disclosed or
claimed  in  any  Patent  hereunder,  to  the  extent  it  may  reasonably  do  so  without  jeopardizing  or
impairing any such Patents.  Each Party’s rights to Prosecute a Patent pursuant to this Section 9.3
will be subject to the applicable provisions of any agreements between the Party controlling such
Patents  and  its  licensor.   All  information  exchanged  between  the  Parties  under  this  Section  9.3
pertaining  to  any  [***]  will  be  deemed  Confidential  Information  of  Xencor,  all  information
exchanged  between  the  Parties  under  this  Section  9.3  pertaining  to  any  Janssen  Patent  will  be
deemed  Confidential  Information  of  Janssen,  and  all  information  exchanged  between  the  Parties
under this Section 9.3 pertaining to any Joint Patents will be deemed Confidential Information of
both Parties.

9.4

Patent Enforcement.  

9.4.1 Notice.  In  the  event  that  Xencor  or  Janssen  becomes  aware  of  any  actual
infringement  or  threat  of  infringement  of  any  Xencor  Patent,  Xencor  Research  Patent,  Janssen
Patent or Joint Patent by means of the sale, including the manufacture for sale, by a Third Party of
a Third Party Competitive Product or a biosimilar product with respect to any Licensed Antibody
or any Licensed Product, or if any Xencor Patent, Xencor Research Patent, Janssen Patent or Joint
Patent  is  challenged  in  any  action  or  proceeding  (other  than  any  oppositions,  cancellations,
interferences,  reissue  proceedings  or  reexaminations,  which  are  addressed  above)  as  invalid  or
unenforceable  (such  infringements  and  challenges  collectively,  “Product  Infringement”  with
respect  to  such  Licensed  Antibody  or  Licensed  Product),  such  Party  will  notify  the  other  Party
promptly,  and  following  such  notification,  the  Parties  will  confer.    As  used  in  this  Section,  a
“Third  Party  Competitive  Product”  means  any  Antibody  containing  a  CD28  Binding  Domain
and a Target Prostate Antigen Binding Domain.

9.4.2 Enforcement of [***].

9.4.2.1

After earliest Candidate Selection, Janssen will have the first right to
institute infringement suits or take other action under the [***], in each case to the extent the same
is  directed  to  a  Product  Infringement,  including  defense  of  a  declaratory  judgment  action  with
respect to a potential Product Infringement (whether prior to or after the First Commercial Sale of
such Licensed Product) (each, an “Infringement Action”).  Janssen will have the right to institute
such suit or other appropriate action in the name of Xencor or of Janssen, or in the

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

58

names of both of them.  For clarity, Janssen will have the right to institute infringement suits or
take other action under Patents owned or controlled by Janssen (not Joint Patents), provided  that
Janssen will keep Xencor reasonably updated on the progress of any such suits or actions.

9.4.2.2

If  Janssen  institutes  or  undertakes  an  Infringement  Action  in
accordance with Section 9.4.2.1, Xencor will cooperate fully with Janssen in its efforts to protect
such Patents and will agree to be a party in any suit, if required, in each case with respect to such
Infringement  Action,  in  each  case  at  Janssen’s  sole  expense.    Xencor  will  have  the  right,  in
Xencor’s  sole  discretion  and  at  Xencor’s  expense,  to  join  or  otherwise  participate  in  such
Infringement Action with legal counsel selected by Xencor.  Janssen will notify and keep Xencor
apprised in writing of such Infringement Action and will consider and take into account Xencor’s
reasonable interests and requests regarding such Infringement Action.

9.4.2.3

If Janssen does not institute or undertake an Infringement Action in
accordance with Section 9.4.2.1 for a period [***] after being requested by Xencor to do so, or (if
sooner) at least [***] prior to the last date such Infringement Action may be brought, Xencor may
institute or undertake and thereafter control such Infringement Action.  In such event, Xencor will
have  the  right,  but  not  the  obligation,  to  institute  or  undertake  such  suit  or  other  appropriate
Infringement Action in the name of Xencor or of Janssen or in the names of both of them.  Janssen
will cooperate fully with Xencor in its efforts to protect such Patents and will agree to be a party in
any  suit,  if  required,  in  each  case  with  respect  to  such  Infringement  Action,  in  each  case  at
Xencor’s sole expense.  Janssen will have the right, in Janssen’s sole discretion and at Janssen’s
expense, to join or otherwise participate in such Infringement Action with legal counsel selected
by Janssen.  Xencor will notify and keep Janssen apprised in writing of such Infringement Action
and will consider and take into account Janssen’s reasonable interests and requests regarding such
Infringement Action.

9.4.3 Enforcement of Joint Patents other than [***].

9.4.3.1

Xencor will have the first right to institute infringement suits or take
other  actions  directed  to  a  Product  Infringement  of  [***],  including  defense  of  a  declaratory
judgment  action  with  respect  to  a  potential  Product  Infringement.    Xencor  will  have  the  right  to
institute such suit or other appropriate action in the name of Xencor or of Janssen, or in the names
of both of them.  Janssen will cooperate fully with Xencor in its efforts to protect such Patents and
will agree to be a party in any suit, if required, at Xencor’s sole expense.  Xencor will notify and
keep Janssen apprised in writing of such action and will consider and take into account Janssen’s
reasonable interests and requests regarding such action.  

9.4.3.2

If Xencor does not institute or undertake an action in accordance with
Section  9.4.3.1  for  a  period  of  [***] after  being  requested  by  Janssen  to  do  so,  or  (if  sooner)  at
least  [***]  prior  to  the  last  date  such  action  may  be  brought,  then  Janssen  may  institute  or
undertake and thereafter control such action, in the name of Xencor or of Janssen or in the names
of both of them.  Janssen will cooperate fully with Xencor in its efforts to protect such Patents and
will agree to be a party in any suit, if required, at Janssen’s sole expense.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

59

9.4.4 Conduct of Patent Litigation under the Biologics Price Competition and Innovation
Act.  If either Party receives a copy of an application submitted to the FDA under subsection (k) of
Section  351  of  the  PHSA  or  equivalent  in  any  other  jurisdiction  pertaining  to  and  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), such Party will, within [***] Business Days, 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  or  equivalent  in  any  other  jurisdiction.    If  either  Party  receives  any  equivalent  or  similar
certification or notice in any other jurisdiction, such Party will, within [***], notify and provide the
other  Party  with  copies  of  such  communication.    Regardless  of  the  Party  that  is  the  “reference
product sponsor” for purposes of such Biosimilar Application, Janssen will have the sole right, but
not the obligation, to initiate an Infringement Action against the filer of the Biosimilar Application
to  enforce  any  [***],  including  whether  or  not  to  utilize,  in  whole  or  in  part,  the  procedures
provided in Section 351 of the PHSA or equivalent in any other jurisdiction.  If Janssen institutes
any such Infringement Action, then Xencor will join as a party to such claim, suit or proceeding
requiring it as a party at Xencor’s sole cost and expense.  With respect to a [***] and to the extent
the  action  is  under  this  Section,  Xencor  will  determine  whether  any  infringement  suit  or  other
action  will  be  initiated,  and  if  so,  which  Party  will  have  the  right  to  initiate  and  undertake  such
action and other matters pertaining to such action.

9.4.5 Cooperation.  In  any  Infringement  Action  brought  under  this  Section  9.4  in  any
jurisdiction,  each  Party  will  reasonably  cooperate  with  each  other,  in  good  faith,  relative  to  the
other  Party’s  efforts  to  protect  the  applicable  Patents  and  will  agree  to  be  a  party  to  such
Infringement  Action,  if  necessary.    Notwithstanding  anything  to  the  contrary  in  this  Section  9.4,
neither Party will settle or compromise any related defense or infringement suit brought under the
[***]  pursuant  to  this  Section  9.4  without  the  prior  written  consent  of  the  other  Party,  which
consent will not be unreasonably withheld.  Furthermore, each Party will provide the other Party
with  reasonable  prior  notice  and  opportunity  to  review  and  comment,  and  will  consider  in  good
faith all reasonable comments from the other Party on, any proposed arguments asserted or to be
asserted in any enforcement action under this Section 9.4.

9.4.6 Recoveries.  With  respect  to  any  Infringement  Action  or  other  action  against  a
Product Infringement initiated pursuant to this Section 9.4, any recovery obtained as a result of any
such proceeding, by settlement or otherwise, will be applied in the following order of priority:

(a)

first,  the  Parties  will  be  reimbursed  for  all  out-of-pocket  expenses
incurred  by  the  Parties  in  connection  with  such  Infringement  Action  or  other  action  and  not
otherwise  recovered  (which  reimbursement  will  be  made  proportionally  if  such  recovery  is  less
than the total of such out-of-pocket expenses); and

recovered by Xencor, allocated [***].

(b)

any  remainder  will  be  (i)  [***]  if  recovered  by  Janssen  and  (ii)  if

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

60

9.4.7 Upstream  Limitations.    Each  Party’s  rights  to  enforce  or  defend  a  Xencor  Patent,
Xencor Research Patent, or Joint Patent against a Product Infringement pursuant to this Section 9.4
will be subject to the applicable provisions of any agreements between the Party controlling such
Patents and its licensor.

9.4.8 Other  Enforcement  of  Xencor  Patents,  Janssen  Patents  and  Joint  Patents.  As
between  the  Parties,  Xencor  will  have  the  sole  right,  in  its  sole  discretion,  to  enforce  any  [***]
against any infringement that is not a Product Infringement and to retain all related recoveries, and
Janssen  will  have  the  sole  right,  in  its  sole  discretion,  to  enforce  any  Janssen  Patent  against  any
infringement that is not a Product Infringement and to retain all related recoveries.  If there is any
infringement of any Joint Patent that is not a [***], then each Party will have the right to enforce
such Joint Patent at its sole expense.

9.5
Patent Term Extensions.    Janssen  will  have  the  sole  discretion,  after  consultation  with
Xencor,  to  determine  which  [***],  if  any,  are  extended  with  respect  to  any  Licensed  Product
pursuant  to  the  U.S.  Drug  Price  Competition  and  Patent  Term  Restoration  Act  of  1984,  the
Supplementary Certificate of Protection of Member States of the EU and other similar measures
in  other  jurisdictions  worldwide.    Upon  Janssen’s  request,  the  Parties  will  discuss  whether  any
[***] will be extended with respect to any Licensed Product, which extension may be made only
with  Xencor’s  written  consent.    Xencor  and  Janssen  will  each  cooperate  and  use  reasonable
efforts  to  gain  any  such  patent  term  extension  permitted  under  this  Section  9.5.   All  filings  for
such extensions will be made by the Party responsible for the Prosecution of such Patents.  

9.6
Regulatory Data Protection.  To the extent required by or permitted by Law, Xencor and
Janssen will each cooperate with one another and will use Diligent Efforts to promptly, accurately
and  completely  list,  with  the  applicable  Regulatory  Authorities  during  the  Term,  all  applicable
Licensed Products that Janssen intends to, or has begun to, Commercialize and that, in case of the
United States, have become the subject of an application for a Marketing Approval submitted to
FDA, such listings to include all so called “Purple Book”  listings  of  biologic  products  by  both
the  Center  for  Drug  Evaluation  and  Research  (CDER)  and  Center  for  Biologics  Evaluation  and
Research (CBER) required under section 351(a) of the PHSA and any foreign equivalent, and will
cooperate  and  use  Diligent  Efforts  to  secure  all  applicable  exclusivity  protection  available  as  a
Biologic Reference Product under the Purple Book.

9.7

Patent Invalidity Claims.  

9.7.1 Right  to  Respond.  If  during  the  Term  a  Third  Party  initiates  a  patent  opposition,
reexamination,  or  other  proceeding  in  the  US  Patent  Office,  European  Patent  Office  or  foreign
equivalent, asserting that [***] are invalid or otherwise unenforceable (an “Invalidity Claim”), the
Parties will treat this as a Prosecution in accordance with Section 9.3.1 or Section 9.3.3.  For the
avoidance  of  doubt,  any  response  to  a  Third  Party  declaratory  judgment  action  with  respect  to
[***] claims or a counterclaim of invalidity or unenforceability of such claims made in the context
of an Infringement Action, to the extent the same pertains to a potential Product Infringement, will
be deemed an Infringement Action and will be governed by Section 9.4.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

61

9.7.2

Invalidity  Claims.  The  non-controlling  Party  will  cooperate  with  the  controlling
Party in the preparation and formulation of a response to an Invalidity Claim, and in taking other
steps  reasonably  necessary  to  respond,  to  such  Invalidity  Claim.  The  controlling  Party  will  have
the sole and exclusive right to select counsel for the response to such Invalidity Claim. The  non-
controlling  Party  will  also  have  the  right  to  participate  and  be  represented  relative  to  such
proceeding  by  its  own  counsel  at  its  own  expense.  The  controlling  Party  will  not  settle  or
compromise any Invalidity Claim in a manner that admits the invalidity or unenforceability of any
[***], or that requires a payment to the Third Party in respect of such Invalidity Claim, without the
consent of the other Party, which consent will not be unreasonably withheld.  For clarity, “control”
under this Section will mean final decision-making authority regarding Prosecution.  

9.8
Claimed Infringement.  Each  of  the  Parties  will  promptly  notify  the  other  in  the  event
that  any  Third  Party  files  any  suit  or  brings  any  other  action  alleging  patent  infringement  by
Janssen  or  Xencor  with  respect  to  the  Exploitation  of  any  Licensed  Antibody  or  a  Licensed
Product (any  such  suit  or  other  action  referred  to  herein  as  an  “Infringement  Claim”).    In  the
event  of  any  Infringement  Claim,  the  Parties  will  promptly,  and  within  [***]  of  written  notice
from  either  Party  to  the  other  thereof,  discuss  which  Party  will  control  the  response  to  such
Infringement Claim, and if the Parties do not mutually agree upon which Party will control, then
Janssen will have the right to control the defense of such Infringement Claim.  Upon the request
of the Party controlling the response to the Infringement Claim, the other Party will reasonably
cooperate with the controlling Party at the controlling Party’s expense in the reasonable defense of
such Infringement Claim.  The other Party will have the right to consult with the controlling Party
concerning  any  Infringement  Claim  and  to  participate  in  and  be  represented  by  independent
counsel in any associated litigation at its own expense.  The damages or recovery obtained by the
Third  Party  asserting  such  Infringement  Claim  will  be  paid  by  Janssen.    Notwithstanding  the
foregoing, (i) no settlement will be entered into, or accepted, without the prior written consent of
the other Party if such settlement would materially adversely affect the rights and benefits of, or
impose  or  adversely  affect  any  obligations  on,  such  other  Party,  which  consent  will  not
unreasonably  be  withheld,  delayed  or  conditioned,  and  (ii)  the  Parties’  rights  and  obligations
under this Section 9.8 will be subject to ARTICLE 12, if applicable.

9.9

Acquirer Intellectual Property.  

9.9.1

If Xencor undergoes a Change of Control, all Xencor Research Intellectual Property
and Xencor Intellectual Property Controlled by Xencor immediately before the consummation of
the  Change  of  Control  shall  continue  to  be  Xencor  Research  Intellectual  Property  or  Xencor
Intellectual  Property,  as  applicable,  for  purposes  of  this  Agreement.    “Acquirer  Intellectual
Property” means any Patents or Know-How Controlled by the Acquirer (or any other Affiliate of
Xencor that becomes an Affiliate through any Change of Control of Xencor) that were Controlled
by  the  Acquirer  or  such  other  Affiliate  (and  not  Xencor)  immediately  prior  to  such  Change  of
Control  (other  than  as  a  result  of  a  license  or  other  grant  of  rights,  covenant  or  assignment  by
Xencor or its other Affiliates to, or for the benefit of, the Acquirer or such Affiliate).  For purposes
of  this  Section  9.9.1,  references  in  the  definition  of  “Control”  to  “a  Party”  will  be  deemed  to
include the Acquirer and its Affiliates.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

62

9.9.2 Notwithstanding  anything  to  the  contrary  in  this  Agreement,  Xencor  Research
Intellectual Property and Xencor Intellectual Property shall not be deemed to include (and Xencor
and  its  Affiliates  shall  not  be  deemed  to  Control)  any  Acquirer  Intellectual  Property  unless  and
solely to the extent such Acquirer Intellectual Property is used by Xencor or the Acquirer, or any
of  their  respective  Affiliates,  to  Research  any  Primary  Antibody.    Xencor  will  notify  Janssen  in
advance  before  using  any  Acquirer  Intellectual  Property  to  Exploit  any  Licensed  Antibody  or
Licensed Product under this Agreement.

9.10 Trademarks.    Janssen  shall  have  the  sole  and  exclusive  right  to,  in  its  sole  discretion,
develop  and  select  (and  conduct  clearance  searches  for)  the  trademark(s)  used  to  brand  the
Licensed Products in the Territory, which may vary by country or within a country (the “Product
Marks”).  For clarity, Product Marks do not include any corporate names and logos of Janssen. 
As between the Parties, Janssen shall own all rights in the Product Marks and shall register and
maintain, in its sole discretion and at its own cost and expense, the Product Marks in the countries
and regions in the Territory that it determines to be appropriate.  Janssen shall have the sole right,
in its discretion and at its expense, to defend and enforce the Product Marks.

ARTICLE 10
CONFIDENTIALITY AND PUBLICITY

10.1 Non-Disclosure and Non-Use.

10.1.1 During  the  Term  and  [***],  the  Party  (the  “Receiving  Party”)  receiving  or
otherwise  in  possession  of  Confidential  Information  of  the  other  Party  (the  “Disclosing  Party”)
will: (a) maintain in confidence such Confidential Information using not less than the efforts such
Receiving Party uses to maintain in confidence its own confidential or proprietary information of
similar  kind  and  value  (but  no  less  than  reasonable  efforts);  (b)  not  disclose  such  Confidential
Information to any Third Party without the prior written consent of the Disclosing Party, except for
disclosures  expressly  permitted  in  Sections  10.3  and  10.4;  and  (c)  not  use  such  Confidential
Information for any purpose except those permitted by this Agreement or internal management and
operations directly related to this Agreement (it being understood that this ARTICLE 10 does not
create or imply any rights or licenses not expressly granted under this Agreement).  

10.1.2 “Confidential  Information”  means  all  non-public  or  proprietary  information  (a)
disclosed  orally,  visually,  in  writing  or  other  form  by  or  on  behalf  of  a  Party  (or  an  Affiliate  or
representative of such Party) to the other Party (or to an Affiliate or representative of such Party)
pursuant to or in connection with this Agreement, whether prior to, on or after the Execution Date
or (b) expressly designated as Confidential Information of a Party under another provision of this
Agreement.  

10.1.3 Any  Know-How  that  is  a  Janssen  Assigned  Invention  will  be  deemed  the

Confidential Information of Xencor only.  

10.1.4 Any data or non-public  information  relating  to  the  Licensed  Antibodies  generated

by either Party in the performance of the Research Program activities under this Agreement

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

63

(“Research  Program  Results”)  is  deemed  to  be  the  Confidential  Information  of  both  Parties
during the Term.  After the Term, (a) all Research Program Results generated by Xencor shall be
deemed the Confidential Information of Xencor (and not Janssen), and (b) all Research Program
Results  generated  by  Janssen  shall  be  deemed  the  Confidential  Information  of  Janssen  (and  not
Xencor), subject to the license granted to Xencor by Janssen under Section 13.6.2.2.

10.2 Exceptions.  The obligations in Section 10.1 will not apply to the extent of any portion of
the Confidential Information that the Receiving Party can show by competent written evidence:

is disclosed to the Receiving Party under this Agreement;

(a)

is publicly disclosed by the Disclosing Party, either before or after it

was  known  to  the  Receiving  Party  or  any  of  its  Affiliates,  without
any obligation to the Disclosing Party to keep it confidential or any restriction on its use, before
disclosure to the Receiving Party or any of its Affiliates by the Disclosing Party;

(b)

(c)

is  subsequently  disclosed  to  the  Receiving  Party  or  any  of  its
Affiliates  on  a  non-confidential  basis  by  a  Third  Party  that,  to  the  Receiving  Party’s  knowledge
after due inquiry, is not bound by a duty of confidentiality to the Disclosing Party or restriction on
its use;

is now, or hereafter becomes, through no act or failure to act on the
part of the Receiving Party or any of its Affiliates in violation of this Agreement, generally known
or available, either before or after it is disclosed to the Receiving Party by the Disclosing Party; or

(d)

is  independently  discovered  or  created  by  or  on  behalf  of  the
Receiving  Party  or  any  of  its  Affiliates  without  the  use  of  or  reference  to  the  Confidential
Information of the Disclosing Party.

(e)

10.3
Authorized Disclosure.  The  Receiving  Party  may  disclose  Confidential  Information  of
the  Disclosing  Party  only  to  the  extent  such  disclosure  is  reasonably  necessary  in  the  following
instances:

(a)

filing,  prosecuting,  maintaining,  enforcing  or  defending  Patents  as

permitted by this Agreement;

as  reasonably  required  in  generating  regulatory  documentation
(including  INDs/CTAs  and  Drug  Approval  Applications)  and  filing  for  and  obtaining  regulatory
licenses as permitted by this Agreement;

(b)

subpoena in a Third Party litigation;

(c)

  prosecuting  or  defending  litigation,  including  responding  to  a

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

64

subject  to  Section  10.4,  complying  with  applicable  Law  (including
regulations promulgated by securities exchanges) or court or administrative orders, including as a
result of any actions taken by a Party not in violation of this Agreement;

(d)

expressly permitted under Section 5.2.4.1 or Section 7.6.2.2; or

(e)

complying with any obligation under this Agreement, or as otherwise

(f)

to 

its  Affiliates  and  existing  or  prospective  (sub)licensees,
subcontractors,  consultants,  agents  and  advisors  to  the  extent  reasonably  necessary  for  the
Receiving  Party  to  exercise  its  rights  or  fulfill  its  obligations  under  this  Agreement  or  to  a
prospective Acquirer or sub(licensee) in connection with bona fide due diligence, each of whom
before disclosure must be bound by obligations of confidentiality and restrictions on use of such
Confidential  Information  that  are  no  less  restrictive  than  the  obligations  in  this  ARTICLE  10,
provided that the Receiving Party will remain responsible for any violation of such confidentiality
provisions  by  any  Person  who  receives  Confidential  Information  pursuant  to  this  Section  10.3(f)
and provided further  that  Xencor  may  not  disclose  any  Confidential  Information  of  Janssen  to  a
prospective  Acquirer  unless  and  until  such  Third  Party  has  provided  Xencor  with  a  written
proposal  for  a  Change  of  Control  transaction  (including  financial  compensation)  and  Xencor’s
board  of  directors  has  determined  (or  is  considering  whether)  to  pursue  negotiations  with  such
prospective Acquirer with respect to such proposal.

If  and  whenever  any  Confidential  Information  is  disclosed  in  accordance  with  this  Section  10.3,
such  disclosure  will  not  cause  such  information  to  cease  to  be  Confidential  Information  for
purposes of this Agreement, except to the extent that such disclosure results in a public disclosure
of such information (other than by breach of this Agreement).  Notwithstanding the foregoing, if a
Party  intends  to  make  a  disclosure  of  the  other  Party’s  Confidential  Information  pursuant  to
Section  10.3(c)  or  Section  10.3(d),  it  will,  except  where  impracticable  or  not  legally  permitted,
give [***] advance notice (or, if [***] notice is not possible under the circumstances, reasonable
advance  notice)  to  the  other  Party  of  such  disclosure  and  use  not  less  than  the  same  efforts  to
secure  confidential  treatment  of  such  information  as  it  would  to  protect  its  own  confidential
information from disclosure (but no less than reasonable efforts).

10.4 Terms  of  Agreement.    This  Agreement  and  all  of  the  terms  of  this  Agreement  will  be
treated as Confidential Information of each Party. In addition to the disclosures permitted under
Section 10.3, either Party may disclose the terms of this Agreement and other information relating
to this Agreement or the transactions contemplated by this Agreement to the extent required, in
the  reasonable  opinion  of  such  Party’s  counsel,  to  comply  with  the  rules  and  regulations
promulgated  by  the  United  States  Securities  and  Exchange  Commission  or  the  Nasdaq  Stock
Market or similar security regulatory authorities or stock market in other countries, including as a
result  of  any  actions  taken  by  a  Party  not  in  violation  of  this  Agreement.    If  a  Party  intends  to
disclose  this  Agreement  or  any  of  its  terms  or  other  such  information  in  accordance  with  this
Section  10.4,  such  Party  will,  except  where  impracticable  or  not  legally  permitted,  give
reasonable advance notice to the other Party of such disclosure and seek confidential treatment of
portions of this Agreement or such terms or information, as may be reasonably requested by the
other Party in a timely manner.

65

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

10.5

Publicity.  

10.5.1 Initial  Press  Release.    Each  Party  may,  but  is  not  obligated  to,  make  a  public
announcement  of  the  execution  of  this  Agreement  in  the  form  attached  as  Exhibit  10.5.1  to  this
Agreement, which will be issued at a time to be mutually agreed by the Parties no later than one
Business Day after the Execution Date.  

10.5.2 Further  Publicity.    Except  as  required  to  comply  with  applicable  Law  or  as
permitted by Section 10.3, 10.4 or 10.5.1, if either Party intends to issue any press release or make
other public statement disclosing any information relating to this Agreement, it will give the other
Party  a  reasonable  opportunity  to  review  and  comment  and  will  consider  any  such  comments  in
good faith.  In addition, such Party will not issue such press release or public statement without the
prior written consent of the other Party, such consent not to be unreasonably withheld, conditioned
or delayed.  If a Party intends to issue such a press release or other public statement as required to
comply with applicable Law, such Party will, except where impracticable or not legally permitted,
give  reasonable  advance  notice  to  the  other  Party  of  such  disclosure.    Notwithstanding  the
foregoing,  once  information  relating  this  Agreement  has  been  publicly  disclosed  as  permitted
under this Agreement, neither Party is required to obtain the other Party’s consent or provide notice
of its further public disclosure, provided that such information remains accurate and not misleading
in all material respects at the time of such further public disclosure.

10.6
Prior Non-Disclosure Agreement.  As of the Execution Date, the terms of this ARTICLE
10 supersede the Mutual Confidentiality Disclosure Agreement by and between Janssen Research
& Development, LLC (“JRD”) and Xencor, [***].  Any information disclosed pursuant to such
agreement  that  was  deemed  “Confidential  Information”  under  such  agreement  is  deemed  to  be
Confidential Information under this Agreement.

10.7 Equitable Relief.  Given the nature of the Confidential Information and the competitive
damage that may result to a Party upon unauthorized disclosure, use or transfer of its Confidential
Information to any Third Party, the Parties agree that monetary damages may not be a sufficient
remedy for any breach of this ARTICLE 10.  In addition to all other remedies, a Party is entitled
to seek specific performance and injunctive and other equitable relief as a remedy for any breach
or threatened breach of this.

10.8

Publications.  

10.8.1 Either Party may publish or present results of any Clinical Study conducted by such
Party relating to a Licensed Product in journals or at conferences, subject to the prior review and
comment  by  the  other  Party  as  set  forth  in  Section  10.8.2.   The  Party  who  conducted  a  Clinical
Study  is  responsible  for  registering  such  Clinical  Study  in  the  appropriate  clinical  study  registry
and reporting Clinical Study results as may be required under applicable Law.

10.8.2 The publishing Party will provide the non-publishing Party with the opportunity to
review  any  such  proposed  abstract,  manuscript  or  presentation  by  delivering  a  copy  of  it  to  the
non-publishing  Party  no  less  than  [***]  before  its  intended  submission  for  publication  or
presentation. The non-publishing Party will have [***] of its receipt of any such abstract,

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

66

manuscript or presentation to comment, and the publishing Party will consider in good faith such
non-publishing  Party’s  comments  in  such  abstract,  manuscript  or  presentation.  If  the  non-
publishing  Party  objects  to  the  disclosure  in  writing  within  the  applicable  review  period,  the
publishing  Party  must  delete  from  the  proposed  disclosure  any  of  the  non-publishing  Party’s
Confidential  Information  upon  the  request  of  the  non-publishing  Party.  In  the  event  of  concern
over  patent  protection,  the  publishing  Party  may  not  submit  such  publication  or  make  such
presentation  containing  such  information  until  the  non-publishing  Party  is  given  a  reasonable
period of time, and in no event less than [***] days, to seek patent protection for any material in
such  publication  or  presentation  which  it  believes  is  patentable,  unless  the  publishing  Party
reasonably determines that publication of such information is required by applicable Law.

ARTICLE 11
REPRESENTATIONS AND WARRANTIES; CERTAIN COVENANTS

11.1 Representations of Authority.  Xencor and Janssen each represents and warrants to the
other Party that, as of the Execution Date, it has full corporate right, power and authority to enter
into this Agreement and to perform its respective obligations under this Agreement and that it has
the right to grant to the other the licenses and sublicenses granted pursuant to this Agreement.

11.2 Consents.  Xencor and Janssen each represents and warrants to the other Party that, except
for  any  regulatory  licenses,  pricing  or  reimbursement  approvals,  manufacturing  approvals  or
similar  approvals  necessary  for  the  Exploitation  of  the  Licensed  Antibodies  and  Licensed
Products, all necessary consents, approvals and authorizations of all government authorities and
other  persons  required  to  be  obtained  by  it  as  of  the  Execution  Date  in  connection  with  the
execution,  delivery  and  performance  of  this  Agreement  (as  contemplated  as  of  the  Execution
Date) have been obtained by the Execution Date, except for those required under the HSR Act or
that would not, individually or in the aggregate, be reasonably expected to have a material adverse
effect on the Exploitation of the Licensed Antibodies and Licensed Products.

11.3 No  Conflict.    Xencor  and  Janssen  each  represents  and  warrants  to  the  other  Party  that,
notwithstanding  anything  to  the  contrary  in  this  Agreement,  the  execution  and  delivery  of  this
Agreement by such Party, the performance of such Party’s obligations under this Agreement (as
contemplated  as  of  the  Execution  Date)  and  the  licenses  and  sublicenses  to  be  granted  by  such
Party  pursuant  to  this  Agreement  (i)  do  not  conflict  with  or  violate  with  such  Party’s
organizational  documents  or  any  requirement  of  Laws  existing  as  of  the  Execution  Date  and
applicable to such Party and (ii) do not conflict with, violate, breach or constitute a default under
any contractual obligations of such Party or any of its Affiliates existing as of the Execution Date,
except,  in  each  case,  for  those  conflicts,  violations,  breaches  or  defaults  that  would  not,
individually or in the aggregate, be reasonably expected to have a material adverse effect on the
Exploitation of the Licensed Antibodies and Licensed Products.

11.4 Enforceability.  Xencor and Janssen each represents and warrants to the other Party that,
as  of  the  Execution  Date,  this  Agreement  is  a  legal  and  valid  obligation  binding  upon  it  and  is
enforceable against it in accordance with its terms, except as such enforcement may be

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

67

limited by bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other
Laws affecting the rights of creditors generally and general equitable principles (whether
considered in a proceeding in equity or at law).

11.5 Additional Representations and Warranties of Xencor.  Xencor represents and warrants
to Janssen that, as of the Execution Date:

11.5.1 Except  for  [***],  neither  Xencor  nor  any  of  its  Affiliates  is  party  to  any  license
agreement with a Third Party in effect on the Execution Date pursuant to which Xencor (or their
respective  Affiliates)  is  obligated  to  pay  any  amount  to  such  Third  Party  to  practice  the  Xencor
Research  Patents  or  Xencor  Patents  that  Cover  Specified  Xencor  Know-How,  or  any  Specified
Xencor Know-How that relates to the Xencor Binding Domains, with respect to Xencor’s (or their
respective Affiliates’) Exploitation of Licensed Antibodies and Licensed Products pursuant to this
Agreement.  

11.5.2 Except for [***],  to the knowledge of Xencor, Xencor exclusively owns all Xencor
Research Patents and Xencor Patents that Cover Specified Xencor Know-How, licensed to Janssen
hereunder  that  exists  on  the  Execution  Date  (the  “Existing  Xencor  Intellectual  Property”).
 Except for [***], no Xencor Research Patents or Xencor Patents that relate to the Xencor Binding
Domains licensed to Janssen hereunder are licensed to Xencor by a Third Party.  Except for [***],
Xencor  is  the  exclusive  owner  of  all  Patents  set  forth  in  Schedule  11.5.10.    There  are  no
agreements  with  any  Third  Party  pursuant  to  which  Xencor  has  licensed  to  Third  Parties  rights
with  respect  to  the  Licensed  Antibodies  or  Licensed  Products.    With  respect  to  the  inventions
related  to  the  CD28  Binding  Domains  set  forth  on  Schedule  11.5.2  (the  “Xencor  CD28
Inventions”): (a) none of the Xencor CD28 Inventions are licensed to Xencor by a Third Party; (b)
Xencor has not disclosed any sequence of any Xencor CD28 Invention to any Third Party; and (c)
there are no agreements with any Third Party pursuant to which Xencor has licensed to such Third
Party rights with respect to any of the Xencor CD28 Inventions.

11.5.3 Xencor  has  all  rights  necessary  to  grant  the  licenses  under  the  Xencor  Research

Intellectual Property and Xencor Intellectual Property that it grants to Janssen in this Agreement.

11.5.4 Xencor has not previously licensed, assigned, transferred, or otherwise conveyed to
any Third Party any right, title or interest in, to or under the Existing Xencor Intellectual Property
in  any  way  that  would  legally  conflict  with  the  licenses  and  rights  granted  to  Janssen  under  this
Agreement.  Xencor has not previously otherwise granted any rights to any Third Party in any way
that would legally conflict with the licenses and rights granted to Janssen under this Agreement.

11.5.5 Xencor  has  not  entered  into  any  agreement  that  would  create  a  lien,  charge  or
encumbrance  with  respect  to  the  Xencor  Research  Patents  or  Xencor  Patents,  and  the  Xencor
Research Patents and Xencor Patents are free and clear of any liens, charges and encumbrances, in
either case that would conflict with the license grants to Janssen under this Agreement.  For clarity,
a license granted by Xencor to a Third Party does not constitute an “encumbrance” for purposes of
this Section 11.5.5.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

68

11.5.6 To  the  knowledge  of  Xencor,  neither  Xencor  nor  any  of  its  Affiliates  or  their
respective current or former employees has misappropriated any of (i) the Know-How necessary or
used by Xencor for the Exploitation of the Licensed Antibodies and Licensed Products by Xencor
as  of  the  Execution  Date,  or  (ii)  the  Xencor  Research  Know-How,  in  each  case  from  any  Third
Party,  and  Xencor  is  not  aware  of  any  claim  by  a  Third  Party  that  such  misappropriation  has
occurred.

11.5.7 Xencor  has  not  received  any  written  notice  of  any  existing  or  threatened  actions,
suits  or  other  proceedings  pending  against  it  with  respect  to  the  Xencor  Research  Intellectual
Property  or  Xencor  Intellectual  Property  (other  than  patent  office  actions  or  the  actions  of  any
Regulatory Authority) that have not already been disclosed to Janssen.

11.5.8 Except  as  already  disclosed,  Xencor  has  not  received  written  notice  from  a  Third
Party  claiming  that  a  patent  owned  by  such  Third  Party  would  be  infringed  by  the  manufacture,
use, sale, offer for sale or import of the Licensed Antibodies or Licensed Products in the Territory,
and no Third Party has threatened in writing to make any such claim.

11.5.9  To the knowledge of Xencor, the use, practice or application by Xencor or Janssen
(or their respective Affiliates or sublicensees) of any Specified Xencor Know-How that relates to
the Xencor Binding Domains as contemplated under the Research Plan would not misappropriate
the  intellectual  property  of  any  Third  Party.    To  the  knowledge  of  Xencor,  the  use,  practice  or
application  by  Xencor  or  Janssen  (or  their  respective  Affiliates  or  sublicensees)  of  any  Xencor
CD28  Invention  would  not  infringe  any  claim  of  an  issued  and  unexpired  patent  of  any  Third
Party.  

11.5.10 The Patents listed in Schedule 11.5.10 represent all Patents that are existing as of
the Execution Date that Xencor or any of its Affiliates owns or Controls that Cover or first disclose
in  a  Patent  any  invention  Controlled  by  Xencor  that  Xencor  reasonably  believes  may  Cover  a
Primary Antibody.  Xencor: (i) is not aware of any claim made against it asserting the invalidity,
misuse, unregisterability, unenforceability or non-infringement of any of such listed Patents other
than patent office actions or the actions of any Regulatory Authority and; and (ii) is not aware of
any  claim  made  against  it  challenging  Xencor’s  Control  of  such  listed  Patents  or  making  any
adverse claim of ownership of the rights of Xencor to such listed Patents.

11.5.11    Xencor  has  not  prepared,  filed  or  obtained  any  INDs/CTAs,  Drug  Approval
Applications  or  any  other  regulatory  documentation  or  regulatory  licenses  for  any  Licensed
Antibodies or Licensed Products in any jurisdiction.

11.5.12  Xencor has conducted, and has used reasonable efforts to cause its contractors and
consultants  to  conduct,  the  Research,  Development  and  Manufacture  of  the  Licensed  Antibodies
and  Licensed  Products  in  accordance  in  all  material  respects  with  applicable  Law,  including  as
applicable GCP and GLP.

11.5.13  Neither  Xencor  nor  any  of  its  Affiliates  has  conducted  (or  had  a  Third  Party
conduct  on  its  behalf)  before  the  Execution  Date  any  Research,  Development  or  Manufacture  of
any Antibody that comprises a Target Prostate Antigen Binding Domain and a

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

69

CD28  Binding  Domain  or  any  product  that  contains  such  an  Antibody,  except  to  the  extent  that
Xencor  disclosed  such  Antibodies  to  Janssen  before  the  Execution  Date.    Xencor  has  made
available  to  Janssen  all  material  information  in  Xencor’s  or  its  Affiliate’s  Control  relating  to  its
activities concerning such Antibodies.

11.5.14  There  is  no  claim,  action,  suit,  arbitration,  inquiry,  audit  or  investigation  by  or
before  any  Governmental  Authority  pending  or,  to  the  knowledge  of  Xencor,  threatened  against
Xencor or involving any of the Licensed Antibodies or Licensed Products. There is no award, stay,
writ, judgement, injunction, decree or similar order of any Governmental Authority outstanding, or
to Xencor’s knowledge pending, involving Xencor or any of the Licensed Antibodies or Licensed
Products. No clinical trial of any Licensed Product has been conducted by or on behalf of Xencor.

11.5.15  Neither Xencor nor any of its Affiliates is or has been a party to any agreement
with a Governmental Authority pursuant to which such Governmental Authority provided or may
provide funding for the Development of any Licensed Antibody or Licensed Product. None of the
Xencor  Research  Patents,  Xencor  Patents  or  Xencor  Research  Know-How  are  or  include  any
invention that was conceived or first actually reduced to practice in the performance of work under
a funding agreement between Xencor and the U.S. government.

11.6 No  Warranties.    EXCEPT  AS  OTHERWISE  EXPRESSLY  SET  FORTH  IN  THIS
AGREEMENT,  NEITHER  PARTY  MAKES  ANY  REPRESENTATION  OR  EXTENDS  ANY
WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, TO THE OTHER PARTY,
IMPLIED  WARRANTIES  OF
AND  EACH  PARTY  HEREBY  DISCLAIMS  ALL 
MERCHANTABILITY, 
AND
NONINFRINGEMENT  WITH  RESPECT  TO  THE  LICENSED  ANTIBODIES  AND
LICENSED  PRODUCTS.  EACH  PARTY  HEREBY  DISCLAIMS  ANY  REPRESENTATION
OR  WARRANTY  THAT  THE  EXPLOITATION  OF  THE  LICENSED  ANTIBODIES  AND
LICENSED PRODUCTS PURSUANT TO THIS AGREEMENT WILL BE SUCCESSFUL OR
THAT  ANY  PARTICULAR  SALES  LEVEL  WITH  RESPECT  TO  THE  LICENSED
PRODUCTS WILL BE ACHIEVED.

PARTICULAR 

PURPOSE 

FITNESS 

FOR 

A 

11.7 No  Debarment  or  Exclusion.    Each  Party  represents  and  warrants  that,  as  of  the
Execution Date, neither it nor any of its Affiliates, nor any of their officers, employees or agents
has  been  debarred  or  is  subject  to  debarment  as  authorized  by  Section  306  of  the  United  States
Federal  Food,  Drug,  and  Cosmetic  Act  or  has  been  excluded  or  is  subject  to  exclusion  from
participation in Government Health Care Programs under 42 U.S.C. § 1320a-7, and neither Party
nor  any  of  its  Affiliates  will  use  in  any  capacity,  in  connection  with  the  Exploitation  of  the
Licensed  Antibodies  or  Licensed  Products  in  the  Field,  any  Person  who  has  been  debarred
pursuant to Section 306 of the United States Federal Food, Drug, and Cosmetic Act, who is the
subject  of  a  conviction  described  in  such  section,  who  has  been  excluded  from  participation  in
Government Health Care Programs under 42 U.S.C. § 1320a-7 or who has been convicted of any
crime or engaged in any conduct for which such Person could be excluded from participation in
Government Health Care Programs under 42 U.S.C. § 1320a-7. Each Party agrees to inform the
other Party in writing immediately if it, any of its officers, employees or

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

70

agents, or any Person who is performing services under this Agreement is debarred, is the subject
of a conviction described in Section 306 of the United States Federal Food, Drug, and Cosmetic
Act, is excluded from participation in Government Health Care Programs under 42 U.S.C. §
1320a-7 or is convicted of any crime for which such Person could be excluded from participation
in Government Health Care Programs under 42 U.S.C. § 1320a-7, or if any action, suit, claim,
investigation or legal or administrative proceeding is pending or, to the best of such Party’s
knowledge, is threatened, relating to the debarment, exclusion or conviction of such Party or any
Person used in any capacity by such Party or any of its Affiliates in connection with the
Exploitation of the Licensed Antibodies or Licensed Products.

11.8 Compliance with Anti-Corruption Laws.  

11.8.1 Notwithstanding  anything  to  the  contrary  in  this  Agreement,  each  Party  hereby

agrees that:

(a)

it  will  not,  in  the  performance  of  this  Agreement,  perform  any
actions that are prohibited by local and other anti-corruption laws (including the provisions of the
U.S. Foreign Corrupt Practices Act, collectively “Anti-Corruption Laws”) that may be applicable
to one or both Parties to this Agreement;

(b)

it  will  not,  in  the  performance  of  this  Agreement,  directly  or
indirectly, make any payment, or offer or transfer anything of value, or agree or promise to make
any  payment  or  offer  or  transfer  anything  of  value,  to  a  government  official  or  government
employee,  to  any  political  party  or  any  candidate  for  political  office  or  to  any  other  Third  Party
related to the transaction with the purpose of influencing decisions related to either Party and/or its
business in a manner that would violate Anti-Corruption Laws;

(c)

if Xencor exercises the Co-Funding Option, Xencor will designate an
individual  within  its  organization  to  receive  training  from  Janssen  on  Anti-Corruption  Laws  as
well as applicable rules on interactions with health care professionals, as mutually agreed to by the
Parties.    Such  designated  individual  will  then  provide  such  training  on  Anti-Corruption  Laws,
using  applicable  training  materials  to  be  provided  by  Janssen,  on  at  least  an  annual  basis  to  all
persons employed by Xencor who perform any activities under this Agreement and interact with
government  officials  or  health  care  professionals  in  the  normal  course  of  their  responsibilities.
  Upon  the  Parties'  mutual  agreement,  such  training  may  also  be  provided  directly  by  Janssen  to
such employees of Xencor.  If Xencor exercises the Co-Funding Option, Xencor and Janssen will
each  use  reasonable  efforts  to  provide  such  training  or  training  materials  to  any  contractors  or
subcontractors  of  such  Party  engaged  to  perform  activities  under  this  Agreement  where  such
contracted  or  subcontracted  activities  include  responsibility  for,  directly  or  indirectly,  interacting
with Public Officials.  Xencor may fulfill its obligation under the preceding sentence by requesting
appropriate materials from Janssen and forwarding such materials, if any, received from Janssen to
the  applicable  contractor  or  subcontractor.    If  Xencor  is  not  able  to  obtain  a  contractor  or
subcontractor’s agreement to receive such training or materials, Xencor will use reasonable efforts
to  facilitate  an  introduction  of  Janssen  to  such  contractor  or  subcontractor  and  not  object  to
reasonable efforts of Janssen to provide such training or materials to the applicable contractor or
subcontractor.  Any training and materials provided by Janssen does not relieve

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

71

Xencor  of  any  obligations  it  has  independent  of  this  Agreement  and  Xencor  will  not  rely  on
Janssen’s training and materials for any such obligations;

(d)

if  Xencor  exercises  the  Co-Funding  Option,  it  will,  on  an  annual
basis upon request by the other Party, verify in writing that to the best of such Party’s knowledge,
there have been no violations of Anti-Corruption Laws by such Party or persons employed by or
subcontractors used by such Party in the performance of this Agreement, or will provide details of
any exception to the foregoing; and

(e)

if Xencor exercises the Co-Funding Option, it will maintain records
(financial  and  otherwise)  and  supporting  documentation  related  to  the  subject  matter  of  this
Agreement in order to document or verify compliance with the provisions of this Section 11.8.1,
and upon request of the other Party, up to once per year and upon reasonable advance notice, will
provide  a  Third  Party  auditor  mutually  acceptable  to  the  Parties  with  access  to  such  records  for
purposes  of  verifying  compliance  with  the  provisions  of  this  Section  11.8.1.    Acceptance  of  a
proposed  Third  Party  auditor  may  not  be  unreasonably  withheld  by  either  Party.    It  is  expressly
agreed that the costs related to the Third Party auditor will be fully paid by the Party requesting the
audit, and that any auditing activities may not unduly interfere with the normal business operations
of Party subject to such auditing activities.  The audited Party may require the Third Party auditor
to enter into a reasonable confidentiality agreement in connection with such an audit.

11.8.2 Xencor  hereby  represents  and  warrants  to  Janssen  that,  to  its  knowledge  as  of  the
Execution  Date,  neither  Xencor  nor  any  of  its  subsidiaries  nor  any  of  their  Affiliates,  directors,
officers, employees, distributors, agents, representatives, sales intermediaries or other Third Parties
acting on behalf of Xencor or any of its subsidiaries or any of their Affiliates:

Law; or

(a)

has taken any action in violation of any applicable Anti-Corruption

has  corruptly,  offered,  paid,  given,  promised  to  pay  or  give,  or
authorized the payment or gift of anything of value, directly or indirectly, to any Public Official (as
defined in Section 11.8.4 below), for the purposes of:

(b)

(i)

influencing  any  act  or  decision  of  any  Public  Official  in  his

official capacity;

violation of his lawful duty;

(ii)

inducing such Public Official to do or omit to do any act in

(iii)

securing any improper advantage; or

inducing such Public Official to use his or her influence with
a  government,  governmental  entity,  or  commercial  enterprise  owned  or  controlled  by  any
government  (including  state-owned  or  controlled  veterinary  or  medical  facilities)  in  obtaining  or
retaining any business whatsoever.

(iv)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

72

11.8.3 Xencor  hereby  represents  and  warrants  to  Janssen  that,  as  of  the  Execution  Date,
none of the officers, directors, employees of Xencor or of any of its subsidiaries acting on behalf of
Xencor  or  any  of  its  subsidiaries,  in  each  case  that  are  employed  or  reside  outside  the  United
States, are themselves Public Officials.

11.8.4 For purposes of this Section 11.8, “Public Official” means:

any  officer,  employee  or  representative  of  any  regional,  federal,
state,  provincial,  county  or  municipal  government  or  government  department,  agency  or  other
division;

(a)

any officer, employee or representative of any commercial enterprise
that is owned or controlled by a government, including any state-owned or controlled veterinary or
medical facility;

(b)

any  officer,  employee  or  representative  of  any  public  international
organization, such as the African Union, the International Monetary Fund, the United Nations or
the World Bank; and

(c)

government entity, enterprise or organization identified above.

(d)

any  person  acting  in  an  official  capacity  for  any  government  or

11.9 Additional Third Party Technology.  Xencor shall obtain Janssen’s written consent prior
to making, identifying, and characterizing any Primary Antibody that cannot be Exploited without
Know-How Controlled by Xencor or its Affiliates (or Patents that Cover such Know-How) that is
licensed to Xencor (other than pursuant to [***]).

11.10 [***].  [***] are Controlled  by  Xencor  as  of  the  Execution  Date. Janssen  acknowledges
that  Xencor’s  license  to  [***]  is  non-exclusive.  Accordingly,  notwithstanding  anything  to  the
contrary in this Agreement, all rights and licenses granted to Janssen under this Agreement with
respect to the [***] are non-exclusive. Any amounts due to [***] or any other Third Party under
the [***] shall be the sole responsibility of Xencor. With respect to the [***], Xencor will:

(a)

use  Diligent  Efforts  to  maintain  in  full  force  and  effect  such
agreement  (in  accordance  with  its  terms)  and  keep  Janssen  fully  informed  of  any  material
development pertaining thereto for so long as the [***] are sublicensed to Janssen in accordance
with Section 8.1;

the extent incompatible with the rights sublicensed to Janssen in accordance with Section 8.1;

(b)

not take any action to terminate, modify, amend, waive any right, to

not fail to enforce any right, knowingly breach or otherwise take any
other action with respect to the [***] that would reasonably be expected to materially impact the
rights granted to Janssen under this Agreement, without the consent of Janssen;

(c)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

73

(d)

(e)

with the terms of the [***];

comply in all material respects with the terms of the [***];

make  all  payments  that  become  due  under  the  [***]  in  accordance

(f)

if Xencor or any of its Affiliates receives written notice claiming that
Xencor or any of its Affiliates has breached or defaulted under, or is in breach of or default under,
its  obligations  under  the  [***],  provide  a  copy  thereof  to  Janssen  promptly  after  receipt  and,
following consultation with Janssen, consider Janssen’s input in good faith and take such actions as
may be reasonably necessary to cure any breach or default; and

take all actions reasonably requested by Janssen to provide Janssen
with the rights and/or benefits available to Xencor or Janssen as a sublicensee under the [***] with
respect to the [***].

(g)

ARTICLE 12
INDEMNIFICATION; INSURANCE

12.1
Indemnification by Janssen.  Janssen will indemnify, defend and hold harmless Xencor
and  its  Affiliates,  and  their  respective  officers,  directors,  employees,  agents,  sublicensees,  and
their  respective  successors,  heirs  and  assigns  and  representatives  (the  “Xencor  Indemnitees”),
from  and  against  any  and  all  claims,  threatened  claims,  damages,  losses,  suits,  proceedings,
liabilities, costs (including reasonable legal expenses, reasonable costs of litigation and reasonable
attorney’s  fees)  or  judgments,  whether  for  money  or  equitable  relief,  of  any  kind  brought  by  a
Third  Party  or  Governmental  Authority  (collectively,  “Losses”),  to  the  extent  arising  out  of  or
relating to:

the gross negligence, intentional misconduct of or violation of Law
by  Janssen,  its  Affiliates,  or  its  sublicensees  and  its  or  their  respective  directors,  officers,
employees and agents;

(a)

any breach of, or inaccuracy in, any representation or warranty made
by Janssen in this Agreement, or any breach or violation of any covenant or agreement of Janssen
in or pursuant to this Agreement;

(b)

for Janssen or any of its Affiliates, sublicensees, agents and contractors; or

(c)

the Exploitation of any Licensed Antibody or Licensed Product by or

Study by or for Janssen or any of its Affiliates, agents and contractors;

(d)

the  conduct  of  any  Independent  Prostate  Combination  Regimen

except, in each case, to the extent such Losses arise out of or relate to the negligence of Xencor or
any of the other Xencor Indemnitees or to the extent otherwise arising out of or relating to clause
(a) or clause (b) of Section 12.2.  

Indemnification by Xencor.  Xencor  will  indemnify,  defend  and  hold  harmless  Janssen

12.2
and its Affiliates, and their respective officers, directors, employees, agents, sublicensees, and

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

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their respective successors, heirs and assigns and representatives (the “Janssen Indemnitees”),
from and against any and all Losses, to the extent arising out of or relating to:

the gross negligence, intentional misconduct of or violation of Law
by  Xencor,  its  Affiliates,  or  its  sublicensees  and  its  or  their  respective  directors,  officers,
employees and agents;

(a)

any breach of, or inaccuracy in, any representation or warranty made
by Xencor in this Agreement, or any breach or violation of any covenant or agreement of Xencor
in or pursuant to this Agreement;

(b)

(c)

the Research of any Primary Antibody by or for Xencor or any of its
Affiliates,  sublicensees,  agents  and  contractors  (but  not  including  Losses  relating  to  intellectual
property  infringement  or  the  subsequent  Exploitation  of  any  Licensed  Antibody  or  Licensed
Product  arising  out  of  or  relating  to  such  Research  by  or  for  Janssen  or  any  of  its  Affiliates,
sublicensees, agents and contractors);

Affiliates, sublicensees, agents and contractors; or

(d)

the Detailing of any Licensed Product by or for Xencor or any of its

Study by or for Xencor or any of its Affiliates, agents and contractors;

(e)

the  conduct  of  any  Independent  Prostate  Combination  Regimen

except, in each case, to the extent such Losses arise out of or relate to the negligence of Janssen or
any of the other Janssen Indemnitees or to the extent otherwise arising out of or relating to clause
(a) or clause (b) of Section 12.1.  

12.3

Indemnification Procedures.  

12.3.1 Indemnification Claims.    A  claim  to  which  indemnification  applies  under  Section

12.1 or Section 12.2 will be referred to as an “Indemnification Claim”.

12.3.2 Notice.  If any Person or Persons (collectively, the “Indemnitee”) intends to claim
indemnification  under  this  ARTICLE  12,  the  Indemnitee  will  notify  the  other  Party  (the
“Indemnitor”)  in  writing  promptly  upon  becoming  aware  of  any  claim  that  may  be  an
Indemnification Claim; provided, however, that failure of the Indemnitee to give such notice will
not  relieve  the  Indemnitor  of  its  indemnification  obligation  under  this  ARTICLE  12,  except  and
only  to  the  extent  that  the  Indemnitor  is  actually  prejudiced  as  a  result  of  such  failure  to  give
notice.  Each claim notice will describe in reasonable detail the basis for such claim (the “Claim
Basis”) and specify the amount or the estimated amount of Losses actually incurred or paid by the
Indemnitee as a result of the Claim Basis, to the extent ascertainable.

12.3.3 Defense of Indemnification Claims.  By delivering notice to the Indemnitee within
[***] after delivery of notice described in Section 12.3.2, the Indemnitor may assume and control,
with  the  sole  power  to  direct,  the  defense  of  the  Indemnification  Claim  at  its  own  expense  with
counsel selected by the Indemnitor and reasonably acceptable to the Indemnitee.  If the Indemnitor
does not assume control of the defense of the Indemnification Claim as described

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

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in this Section 12.3.3, the Indemnitee will control such defense at Indemnitor’s expense (subject to
Sections 12.1 and 12.2).  The Party not controlling such defense may participate therein at its own
expense.  The Party controlling the defense of an Indemnification Claim will keep the other Party
advised of the status of such Indemnification Claim and the defense thereof and will reasonably
consider recommendations made by the other Party with respect thereto.  The other Party will
cooperate fully with the Party controlling such defense and will make available all pertinent
information under its control, which information will be subject to ARTICLE 10, and cause its
employees to be available in a deposition, hearing or trial.

12.3.4 Resolution of Indemnification Claims.  Neither the Indemnitor nor the Indemnitee
will admit fault on behalf of the other Party without the written consent of such other Party. The
Indemnitee  will  not  settle  or  compromise  an  Indemnification  Claim  without  the  prior  written
consent of the Indemnitor. The Indemnitor will not settle or compromise an Indemnification Claim
or consent to any judgment in respect thereof that does not include a complete and unconditional
release  of  the  Indemnitee  from  all  liability  with  respect  thereto  or  that  imposes  any  liability  or
obligation on the Indemnitee for which the Indemnitee is not indemnified under this Agreement,
without the prior written consent of the Indemnitee.

12.4
Insurance.  Each Party will acquire and maintain, at its own expense, insurance or self-
insurance, as reasonably necessary to cover its own product liability and its obligations under this
Agreement.  Within  [***]  days  following  written  request  from  the  other  Party,  each  Party  will
furnish to such other Party a certificate of insurance evidencing such coverage.  

ARTICLE 13
TERM AND TERMINATION

13.1 Term.    Unless  terminated  earlier  in  accordance  with  this  ARTICLE  13,  this  Agreement
will remain in force for the period commencing on the Execution Date and ending, on a country-
by-country  basis  and  Licensed  Product-by-Licensed  Product  basis,  upon  the  expiration  of  the
Royalty Term in such country for such Licensed Product (the “Term”).  The following provisions
will  become  effective  on  the  Execution  Date:  ARTICLE  1  (Definitions),  ARTICLE  10
(Confidentiality  and  Publicity),  ARTICLE  11  (Representations  and  Warranties;  Certain
Covenants),  ARTICLE  14  (Efforts  to  Obtain  Clearances),  ARTICLE  15  (Dispute  Resolution),
ARTICLE  16  (Miscellaneous)  and  this  Section  13.1  (Term),  Section  13.2  (Termination  for
Material Breach), Section 13.5 (Provisions for Insolvency), Section 13.6.1.2, Section 13.6.4 (Non-
Exclusive  Remedy)  and  Section  13.6.5  (Survival)  (with  respect  to  any  provisions  that  become
effective  on  the  Execution  Date).    All  other  provisions  of  this  Agreement  will  not  become
effective until the Effective Date.

13.2 Termination for Material Breach.  

13.2.1 Right to Terminate for Material Breach.  Either Party (the “Non-breaching Party”)
may terminate this Agreement in its entirety in the event of a material breach of this Agreement by
the other Party (the “Breaching Party”), by providing [***] prior written notice to the Breaching
Party (the “Cure Period”).    Such  notice  will  reasonably  describe  the  alleged  material  breach  in
sufficient detail to put the Breaching Party on notice and clearly state the Non-breaching Party’s
intent to terminate this Agreement if the alleged breach is not cured within the

76

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Cure Period.  Notwithstanding the foregoing: (a) the Cure Period in connection with a material
breach of a payment obligation under ARTICLE 7 will be [***]; and (b) if the alleged material
breach (other than a payment breach), by its nature, is curable, but is not reasonably curable within
the Cure Period, then such Cure Period will be extended if the Breaching Party provides a written
plan for curing such breach to the Non-breaching Party and uses Diligent Efforts to cure such
breach in accordance with such written plan, provided that no such extension will exceed [***]
without the consent of the Non-breaching Party.

13.2.2 Disputes.  If the Breaching Party disputes in good faith the existence or materiality
of a breach specified in a notice provided by the other Party in accordance with Section 13.2.1, and
the Breaching Party provides the other Party notice of such dispute within the Cure Period, then
the Non-breaching Party will not have the right to terminate this Agreement under Section 13.2.1
with respect to such alleged breach unless and until (a) the dispute resolution process in ARTICLE
15 has finally determined that the Breaching Party has materially breached this Agreement and (b)
the  Breaching  Party  fails  to  cure  such  material  breach  within  [***]  (or  [***]  in  the  case  of  the
breach of a payment obligation) following such final determination.  It is understood and agreed
that, during the pendency of such dispute, all of the terms and conditions of this Agreement will
remain  in  effect  and  the  Parties  will  continue  to  perform  all  of  their  respective  obligations
hereunder.

13.3 Termination by Janssen Without Cause.  Janssen may, upon [***] prior written notice
to Xencor, terminate this Agreement in its entirety without cause.

13.4 Termination  if  No  Candidate  Selection.    Xencor  may  terminate  this  Agreement,  upon
[***]  prior  written  notice  to  Janssen,  if  Janssen  does  not  notify  Xencor  of  its  election  to  make
Candidate Selection within the [***] period described in Section 3.7.2.

13.5

Provisions for Insolvency.  

13.5.1 Right to Terminate for Insolvency.  Either Party may terminate this Agreement if, at
any time, the other Party files in any court or agency pursuant to any statute or regulation of any
state or country, a petition in bankruptcy or insolvency or for reorganization or for an arrangement
or for the appointment of a receiver or trustee of the Party or of substantially all of its assets, or if
the other Party is served with an involuntary petition against it, filed in any insolvency proceeding,
and  such  other  Party  consents  to  the  involuntary  bankruptcy  or  such  petition  is  not  dismissed
within  [***]  after  the  filing  thereof,  or  if  the  other  Party  will  propose  or  be  a  party  to  any
dissolution or liquidation, or if the other Party will make an assignment of substantially all of its
assets for the benefit of creditors (each, an “Insolvency Event”).

13.5.2 Section  365(n)  of  the  Bankruptcy  Code.  All  rights  and  licenses  now  or  hereafter
granted by Xencor to Janssen under or pursuant to this Agreement, including, for the avoidance of
doubt,  the  licenses  granted  to  Janssen  pursuant  to  Section  8.1,  are,  for  all  purposes  of
Section 365(n) of Title 11 of the United States Code, as amended (such Title 11, the “Bankruptcy
Code”), licenses of rights to “intellectual property” as defined in the Bankruptcy Code.  Upon the
occurrence  of  any  Insolvency  Event  with  respect  to  Xencor,  Xencor  agrees  that  Janssen,  as
licensee of such rights under this Agreement, will retain and may fully exercise all of

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

77

its rights and elections under the Bankruptcy Code.  Without limiting the generality of the
foregoing, Xencor and Janssen intend and agree that any sale of Xencor’s assets under Section 363
of the Bankruptcy Code will be subject to Janssen’s rights under Section 365(n), that Janssen
cannot be compelled to accept a money satisfaction of its interests in the intellectual property
licensed pursuant to this Agreement, and that any such sale therefore may not be made to a
purchaser “free and clear” of Janssen’s rights under this Agreement and Section 365(n) without the
express, contemporaneous consent of Janssen.  Further, each Party agrees and acknowledges that
all payments by Janssen to Xencor hereunder, other than Sales Milestone Payments or Co-Funding
Sales Milestone Payments, as applicable, under Section 7.3 and royalty payments under
Section 7.4, do not constitute royalties within the meaning of Section 365(n) of the Bankruptcy
Code or relate to licenses of intellectual property hereunder.  Xencor will, during the Term, create
and maintain current copies or, if not amenable to copying, detailed descriptions or other
appropriate embodiments, to the extent feasible, of all such intellectual property.  Xencor and
Janssen acknowledge and agree that “embodiments” of intellectual property within the meaning of
Section 365(n) include laboratory notebooks, cell lines, product samples and inventory, research
studies and data, regulatory filings and marketing approvals.  If (i) a case under the Bankruptcy
Code is commenced by or against Xencor, (ii) this Agreement is rejected as provided in the
Bankruptcy Code, and (iii) Janssen elects to retain its rights hereunder as provided in
Section 365(n) of the Bankruptcy Code, Xencor (in any capacity, including debtor-in-possession)
and its successors and assigns (including a trustee) will:

13.5.2.1

provide to Janssen all such intellectual property (including copies of
embodiments  of  such  intellectual  property)  held  by  Xencor  and  such  successors  and  assigns,  or
otherwise available to them, immediately upon Janssen’s written request; and

13.5.2.2

not  interfere  with  Janssen’s  rights  under  this  Agreement,  or  any
agreement  supplemental  hereto,  to  such  intellectual  property  (including  such  embodiments),
including any right to obtain such intellectual property (or such embodiments) from another entity,
to the extent provided in Section 365(n) of the Bankruptcy Code.

If Xencor or any of its successors or assigns provides to Janssen any of the intellectual property
licensed hereunder (or any embodiment thereof) under this Section 13.5.2, Janssen will have the
right to perform Xencor’s obligations under ARTICLE 3 with respect to such intellectual property,
but  neither  such  provision  nor  such  performance  by  Janssen  will  release  Xencor  from  liability
resulting from rejection of the license or failure to perform such obligations.

13.5.3 Other  Rights.    All  rights,  powers  and  remedies  of  Janssen  provided  herein  are  in
addition  to  and  not  in  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  Xencor.  The  Parties  agree
that they intend the following rights to extend to the maximum extent permitted by law, and to be
enforceable under Bankruptcy Code Section 365(n):

13.5.3.1

the  right  of  access  to  any  intellectual  property  (including  all
embodiments thereof) of Xencor, or any Third Party with whom Xencor contracts to perform an
obligation of Xencor under this Agreement, and, in the case of the Third Party, which is

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

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necessary  for  the  manufacture,  use,  sale,  import  or  export  of  Licensed  Antibodies  or  Licensed
Products; and

13.5.3.2

the  right  to  contract  directly  with  any  Third  Party  to  complete  the

contracted work.

13.6 Effects of Termination or Expiration.  

13.6.1 Effects  of  Termination.    In  the  event  of  termination  of  this  Agreement  by  either
Party  pursuant  to  Section  13.2,  13.3,  13.4  or  13.5,  then  the  following  provisions  of  this  Section
13.6.1 will apply upon the effective date of such termination.

All licenses and other rights granted to either Party pursuant to this
Agreement will terminate, except those expressly stated to survive termination of this Agreement.  

13.6.1.1

13.6.1.2

Each  Party  will  use  Diligent  Efforts  to  return  or  destroy,  at  the
Disclosing  Party’s  election,  all  Confidential  Information  of  the  other  Party  (provided,  however,
that  the  Receiving  Party  may  keep  one  copy  of  such  Confidential  Information  subject  to  an
ongoing  obligation  of  confidentiality  for  archival  purposes  only),  except  for  any  Confidential
Information to which the Receiving Party has a continuing right of use.  This obligation to return
or destroy Confidential Information does not extend to automatically generated computer back-up
or archival copies generated in the ordinary course of information system’s procedures; provided,
however, that except as expressly set out herein, the Receiving Party will not access nor make any
use of such copies.

13.6.1.3

to  compliance  with  ethical  and 

Subject to Section 13.6.1, Janssen will wind down any Development,
Manufacturing and Commercialization activities with respect to the Licensed Products, as quickly
legal  requirements.
as  reasonably  practicable,  subject 
  Notwithstanding  anything  to  the  contrary,  none  of  Janssen’s  costs  incurred  in  connection  with
winding  down  Development  shall  be  considered  Shared  Development  Costs  (and  Xencor  shall
have  no  obligation  to  be  responsible  for  or  share  such  costs)  except:  (a)  with  respect  to  Clinical
Studies  to  the  extent  set  forth  in  Section  13.6.2.8;  or  (b)  to  the  extent  Xencor  directs  Janssen  to
undertake such wind down activity.  Following the  date of notice of termination, Janssen will have
no obligation to initiate any Clinical Study or to commence any other new Development activities
for the Licensed Products.  

13.6.2 Right  of  Reversion.    The  following  provisions  of  this  Section  13.6.1  will  apply

upon the effective date of termination of this Agreement.

13.6.2.1

(a)

(b)

occurs when [***].

“Applied Janssen Technology” means [***].

“Research  Clone  Banking,”  with  respect  to  a  Licensed  Antibody,

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

79

Reverted Product.

(c)

“Reverted  Antibody”  means  a  Licensed  Antibody  contained  in  a

(d)

(e)

“Reverted Derivative” for a Reverted Antibody, means [***].    

“Reverted Variant” for a Reverted Antibody, means [***].

(f)

“Reverted  Product”  means  any  Licensed  Product  containing  (or
that  is)  a  Licensed  Antibody  for  which:  [***].  Notwithstanding  the  foregoing,  if  a  Licensed
Product  described  in  the  immediately  preceding  sentence  is  a  Combination  Product,  a  product
containing  only  the  Licensed  Antibody  within  such  Combination  Product  shall  be  deemed  a
Reverted Product, but the Combination Product shall not be deemed a Reverted Product.  

Product, any product that contains: [***].

(g)

“Reverted Product Derivative”  means,  with  respect  to  a  Reverted

13.6.2.2

For  each  Reverted  Product,  Janssen  hereby  grants  to  Xencor,
effective as of the effective date of termination, an exclusive (even as to Janssen), royalty-bearing,
non-transferable,  perpetual  license,  with  a  right  to  sublicense  through  multiple  tiers,  under  the
Applied  Janssen  Technology  with  respect  to  such  Reverted  Product,  to  Exploit  such  Reverted
Product  and/or  any  Reverted  Product  Derivatives  of  such  Reverted  Product  in  the  Field  in  the
Territory; provided, however, that if any Applied Janssen Technology was in-licensed or acquired
from a Third Party and is subject to payment or other obligations to such Third Party, Janssen will
promptly disclose such obligations to Xencor in writing and such Applied Janssen Technology will
be subject to the license granted in this Section only to the extent Xencor agrees in writing to be
bound  by  such  obligations  and  reimburse  all  amounts  owed  to  such  Third  Party  as  a  result  of
Xencor’s  exercise  of  such 
to  such  Applied  Janssen  Technology.
 Notwithstanding the foregoing, the foregoing license does not include the grant of any rights to
Exploit any active ingredient other than the Licensed Antibodies contained in a Reverted Product
or Reverted Product Derivative.

license  with  respect 

13.6.2.3

Xencor will pay to Janssen royalties on Net Sales of the applicable
Reverted  Product  (or  corresponding  Reverted  Product  Derivative)  at  the  Reversion  Royalty  Rate
(where  references  to  “Janssen”  in  the  definition  of  Net  Sales  will  be  replaced  with  “Xencor”).
  “Reversion  Royalty  Rate”  means  [***].  Such  payments  will  be  made  in  accordance  with  the
terms  set  forth  in  Section  7.4,  applied  mutatis  mutandis  with  respect  to  Net  Sales  of  Licensed
Products by Xencor, provided that the definition of Royalty Term in Section 7.4.2 will remain the
same.

13.6.2.4

Janssen  will  assign  or  otherwise  transfer  to  Xencor  all  regulatory
documentation and filings and regulatory approvals (including, without limitation, all INDs/CTAs
and Drug Approval Applications and approvals thereof) for the Reverted Product (excluding any
portion  thereof  pertaining  to  any  product  that  is  not  the  Reverted  Product)  (“Regulatory
Documentation  and  Filings”)  and  copies  of  all  clinical  and  nonclinical  data  relating  to  the
Reverted Product Controlled by Janssen or any of its Affiliates or sublicensees.  Janssen will, and
will procure that its Affiliates and sublicensees will, take such actions and

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

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execute such instruments, assignments and documents as may be reasonably requested by Xencor
to  effect  the  transfer  of  rights  under  such  Regulatory  Documentation  and  Filings  to  Xencor.    If
applicable  Law  prevents  or  delays  the  transfer  of  ownership  of  any  such  Regulatory
Documentation and Filings to Xencor, Janssen will grant to Xencor an exclusive and irrevocable
right  of  access  and  reference  to  such  Regulatory  Documentation  and  Filings,  and  will  cooperate
with  Xencor  to  make  the  benefits  of  such  Regulatory  Documentation  and  Filings  available  to
Xencor or its designee(s).

13.6.2.5

Upon request from Xencor, Janssen will deliver to Xencor all safety
data contained in the global safety database for the Reverted Product and transfer control of and
responsibility for maintaining the global safety database for the Reverted Product to Xencor.

13.6.2.6

Janssen will, at Xencor’s request, use Diligent Efforts to facilitate an
orderly and prompt transition of any Manufacturing of each Reverted Product that was clinically
Developed  by  or  for  Janssen  or  its  Affiliates  (a  “Clinical  Reverted  Product”)  then  being
conducted  by  Janssen  and  any  of  its  Affiliates  or  Third  Party  subcontractors  to  Xencor  or  its
designee.    At  Xencor’s  request,  Janssen  will  supply  Xencor  or  its  designee  with  such  Clinical
Reverted Product at a price equivalent to the Manufacturing Cost of Clinical Supply, provided that
Janssen will not be obligated to continue to supply such Clinical Reverted Product for more than
[***] following the effective date of termination.  Upon Xencor’s request, Janssen will promptly
provide  Xencor  with  Janssen’s  inventory  of  Reverted  Products  and  Licensed  Antibodies  with
respect thereto at a price equal to [***].

13.6.2.7

If the First Commercial Sale of the Reverted Product has occurred in
a country before the effective date of termination of this Agreement, then, if requested by Xencor,
Janssen shall continue to Commercialize the Reverted Product in such country in accordance with
the terms and conditions of this Agreement, for a period requested by Xencor not to exceed [***]
from the effective date of termination of this Agreement.  Janssen will be entitled to receive and
retain all amounts invoiced on sales of Reverted Product during such period, subject to payment of
royalties pursuant to Section 7.4.

13.6.2.8

If,  on  the  date  of  notice  of  termination,  any  Clinical  Study  of  the
Reverted Product is ongoing pursuant to the GDP (i.e., first patient has been dosed), then Xencor
will notify Janssen in writing within [***] after the date of notice of termination whether Xencor
elects to have Janssen either:

compliance with ethical and legal requirements; or

(a)

wind  down  such  Clinical  Study  as  soon  as  practicable,  subject  to

(b)

transfer  responsibility  for  and  control  of  such  Clinical  Study  to
Xencor as soon as practicable.  Janssen will use Diligent Efforts to effect such transfer, and Xencor
will  use  Diligent  Efforts  to  assume  responsibility  for  and  control,  of  such  Clinical  Study  as
promptly  as  practicable  after  the  effective  date  of  termination  and,  in  any  event,  within  [***]
following the effective date of termination.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

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Until  the  effective  date  of  termination,  the  costs  of  such  Clinical  Study  will  be  shared  by  the
Parties as Shared Development Costs to the extent such costs are to be shared pursuant to Section
6.2.3.    After  the  effective  date  of  termination:  (x)  costs  incurred  in  the  winding  down  of  such
Clinical  Study  in  accordance  with  clause  (a)  above  will  be  shared  by  the  Parties  as  Shared
Development  Costs  to  the  extent  such  costs  are  to  be  shared  pursuant  to  Section  6.2.3;  and  (y)
costs  incurred  to  conduct  any  Clinical  Study  that  Xencor  elects  to  have  transferred  to  Xencor  in
accordance with clause (b) above will be borne solely by Xencor.  If Xencor fails to notify Janssen
which option ((a) or (b)) it chooses within the [***] time period, then Xencor will be deemed to
have elected to have Janssen wind down the Clinical Study.

13.6.2.9

The  Parties  will  meet  after  the  date  of  notice  of  termination  to
discuss a transition plan setting forth the steps and process for an efficient and orderly transition of
Development,  Manufacturing  and  Commercialization  activities  with  respect  to  each  Clinical
Reverted  Product,  including  the  activities  described  in  this  Section  13.6.2.    Except  as  otherwise
provided  in  this  Section  13.6.2,  each  Party  will  bear  its  own  costs  of  conducting  transition
activities.  

13.6.2.10

Upon  termination,  at  Xencor’s  request,  Janssen  will  assign  to
Xencor,  all  worldwide  rights  in  and  to  any  and  all  Product  Marks  used  to  Commercialize  a
Reverted Product in the Territory, including all trademark applications and registrations.  Xencor
shall be solely responsible for all costs and expenses related to the assignments, including recordal
of the same.  For a period of up to [***] after the termination date, at Xencor’s cost and expense,
(a)  Janssen  shall  provide  to  Xencor  the  necessary  information  to  permit  Xencor  to  effect  and
perfect the transfer of the applications and registrations of the Product Marks and (b) Janssen shall
reasonably cooperate with Xencor in executing appropriate documents to effectuate the transfer or
assignment  for  the  Product  Marks  worldwide  that  are  in  the  name  of  Janssen  or  any  of  its
Affiliates.  After such period, Janssen shall have no further obligation with respect to the matters
covered by this Section.

13.6.2.11

For  a  period  of  [***]  following  the  effective  date  of  termination,
Janssen will reasonably cooperate with Xencor to provide reasonable technical assistance, and to
transfer to Xencor any Janssen Know-How licensed to Xencor under Section 13.6.2.2, as requested
by  Xencor.    Such  cooperation  will  include  providing  Xencor  with  reasonable  access  by
teleconference  or  in-person  at  Janssen’s  facilities  to  any  Janssen  personnel  involved  in  the
performance of the Exploitation of Reverted Products or their underlying Licensed Antibodies.  

13.6.2.12

At  Xencor’s  sole  discretion  and  direction,  Janssen  shall  reasonably
cooperate  with  Xencor  to  provide  to  Xencor  a  copy  of  all  promotional  or  marketing  materials
being  used  (or  approved  for  use)  by  Janssen  or  its  Affiliates  prior  to  the  effective  date  of
termination in relation to Commercialization of the Reverted Products; provided that Janssen may
redact  the  foregoing  Commercialization  documentation  for  any  confidential  or  proprietary
information of Janssen that is not related to the Commercialization of the Reverted Products.

13.6.2.13

At Xencor’s sole discretion and direction, Janssen and its Affiliates

shall assign all of Janssen’s right, title and interest in and to any agreements (or portions thereof)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

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between  Janssen  and  Third  Parties  entered  into  after  the  Effective  Date  that  solely  relate  to  the
Development,  Commercialization  or  Manufacture  of  the  Clinical  Reverted  Products,  where  such
assignment is permitted without charge to Janssen or its Affiliates and where Xencor shall assume
all future payments due under any agreement assigned pursuant to this paragraph.

13.6.2.14

Notwithstanding  anything  in  ARTICLE  9,  Xencor  shall  have  with
respect to a Reverted Product: (a) final decision-making authority over Prosecution of all [***]; (b)
the sole right, but not the obligation, to initiate Infringement Actions with respect to [***]; (c) the
sole discretion to determine which [***], if any, are extended with respect to any Reverted Product
pursuant  to  the  U.S.  Drug  Price  Competition  and  Patent  Term  Restoration  Act  of  1984,  the
Supplementary Certificate of Protection of Member States of the EU and other similar measures in
other jurisdictions worldwide; and (d) control over all Invalidity Claims for [***].  Additionally,
the language in the first sentence of Section 9.6 above that reads “Janssen intends” shall be deemed
to read “Xencor intends.”  

13.6.2.15

Xencor  will  indemnify,  defend  and  hold  harmless  the  Janssen
Indemnitees  from  and  against  any  and  all  Losses  to  the  extent  arising  out  of  or  relating  to  the
Exploitation of the Reverted Product by or for Xencor or any of its Affiliates, sublicensees, agents
and  contractors  on  or  after  the  effective  date  of  termination.   Any  claim  of  indemnification  by  a
Janssen Indemnitee under this Section will be subject to the procedures set forth in Section 12.3 of
this Agreement.

13.6.3 Effects of Expiration.  If this Agreement expires in accordance with Section 13.1,
the licenses and other rights granted by one Party to the other Party with respect to the Licensed
Products  in  the  Field  will  survive  on  a  fully-paid,  royalty-free,  non-exclusive,  irrevocable  and
perpetual basis.

13.6.4 Non-Exclusive  Remedy.    Notwithstanding  anything  herein  to  the  contrary,
expiration or termination of this Agreement by a Party will be without prejudice to other remedies
such Party may have at law or equity.

13.6.5 Survival.  Unless  otherwise  expressly  provided  in  this  Agreement,  in  the  event  of
any expiration or termination of this Agreement the Sections and Articles set forth below, as well
as  any  other  Sections,  Articles  or  defined  terms  referred  to  in  such  Sections  or  Articles  or
necessary  to  give  them  effect,  will  survive:  ARTICLE  5  (with  respect  to  Permitted  Prostate
Combination Regimen Studies previously consented to by the non-proposing Party), ARTICLE 10,
ARTICLE  15,  ARTICLE  16,  Sections  3.4.3,  7.6,  7.7  (with  respect  to  amounts  paid  under  the
Agreement), 8.1.3, 8.1.4, 8.2 (with respect to the licenses granted under Sections 8.1.3 and 8.1.4),
9.2.3,  9.3.3,  9.3.4,  9.4.5,  9.6,  9.7,  11.6,  12.1,  12.2,  12.3,  and  13.6.    Furthermore,  any  other
provisions required to interpret such Parties’ surviving rights and obligations under this Agreement
will  survive  to  the  extent  required.   Termination  or  expiration  of  this  Agreement  does  not  affect
any  liabilities,  including  accrued  payment  obligations,  that  accrued  prior  to  (and  such  liabilities
will  survive)  termination  or  expiration  of  this  Agreement.    Except  as  otherwise  provided  in  this
ARTICLE 13, all rights and obligations of the Parties under this Agreement,

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

83

including any licenses and sublicenses granted under this Agreement, will terminate upon
expiration or termination of this Agreement for any reason.

ARTICLE 14
EFFORTS TO OBTAIN CLEARANCES

14.1 Commercially  Reasonable  Efforts.    Subject  to  the  terms  and  conditions  of  this
Agreement,  from  the  Execution  Date  to  the  Effective  Date  or  the  earlier  termination  of  this
Agreement  pursuant  to  ARTICLE  13,  each  of  the  Parties  will  use  its  commercially  reasonable
efforts to take or cause to be taken all actions, to file or cause to be filed all documents, to give or
cause to be given all notices to Governmental Authorities or other Persons, to obtain or cause to
be obtained all authorizations, consents, waivers, approvals, permits or orders from Governmental
Authorities or other Persons, and to do or cause to be done all other things necessary, proper or
advisable,  in  order  to  cause  the  Effective  Date  to  occur  as  soon  as  practicable  following  the
Execution  Date.    If  the  Effective  Date  has  not  occurred  within  [***]  after  the  Execution  Date,
then either Party may terminate this Agreement upon notice, in which case, all provisions of this
Agreement  shall  terminate  and  be  of  no  force  or  effect  whatsoever,  except  only  that:  (a)  any
liability of either Party for failing to comply with this Section 14.1 or ARTICLE 10 shall survive;
and (b) ARTICLE 10 shall survive.

14.2 Antitrust Filing.  

14.2.1 In furtherance and not in limitation of the foregoing, each of the Parties will prepare
and file, or cause to be prepared and filed, any required notification pursuant to the HSR Act that is
required  to  be  made  by  such  Party  or  its  ultimate  parent  with  respect  to  the  transactions
contemplated by this  Agreement  (the  “Contemplated Transactions”)  as  promptly  as  reasonably
practicable after, and in no event more than [***] following the Execution Date.  The Parties will
furnish each other with all necessary information and cooperate with each other in connection with
the preparation of such filings, submissions and registrations and seek to secure the expiration or
termination of all applicable waiting periods (or any extension thereof) under the HSR Act  and to
obtain  all  such  authorizations,  consents,  waivers,  approvals,  permits  and  orders  as  soon  as
practicable  following  the  Execution  Date.    Each  Party  will  provide  the  other  Party  with  a
reasonable  opportunity  to  review  and  comment  on  any  filing,  submission,  registration  or  other
written communication to be given to, and consult with each other in advance of any meeting or
conference with, the FTC, the Antitrust Division of the DOJ or any other Governmental Authority
in  connection with the  efforts  taken  pursuant  to  this  Section  or  otherwise  in  connection with the
Contemplated  Transactions.    Janssen  shall  be  responsible  for  any  filing  fees  required  under  the
HSR Act .  Notwithstanding anything in this Agreement to the contrary, Janssen shall, on behalf of
the Parties, control and lead all communications and strategy for dealing with any Governmental
Authority under the HSR Act.

14.2.2 If any investigation, inquiry or other Action, whether initiated by a Governmental
Authority or a private party, arising out of or relating to any such filing, submission or registration
or  otherwise  relating  to  the  Contemplated  Transactions  is  initiated  or  threatened,  each  Party  will
keep  the  other  Party  reasonably  informed  of  any  material  communications  and  developments  in
connection therewith.  Subject to applicable Laws relating to the exchange of

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

84

information  and  appropriate  confidentiality  protections,  Xencor  and  Janssen,  or  their  counsel,  to
the  extent  practicable,  shall  have  the  right  to  participate  in  all  substantive  communications  or
meetings  with  any  Governmental  Authority  in  connection  with  review  of  the  Contemplated
Transactions under the HSR Act, to the extent permitted by such Governmental Authority.

14.2.3 The  Parties  will  use  commercially  reasonable  efforts  to  promptly  respond  to  all
inquiries made by the FTC, DOJ and any other applicable Governmental Authorities in connection
with such filings, submissions or registrations or otherwise in connection with the Contemplated
Transactions and to promptly provide to such Governmental Authorities any additional information
and documentary material requested under applicable Law.  If any objections are raised or asserted
with respect to the Contemplated Transactions under applicable Law or if any Action is instituted
(or  threatened  to  be  instituted)  by  the  FTC,  the  DOJ  or  any  other  applicable  Governmental
Authority  or  any  private  party  challenging  any  of  the  transactions  contemplated  under  this
Agreement as being in violation of any applicable Law or which would otherwise prevent, impede
or  delay  the  consummation  of  the  Contemplated  Transactions,  the  Parties  will  use  their
commercially  reasonable  efforts  to  resolve  any  such  objections  or  Actions  so  as  to  permit
consummation of the Contemplated Transactions as soon as reasonably practicable, provided that
commercially reasonable efforts of Janssen will not require Janssen or any of its Affiliates to agree
to  any  prohibition,  limitation,  divestiture  or  other  requirement  that  would  (a)  limit  or  otherwise
adversely affect the right of Janssen to Exploit the Licensed Antibodies and Licensed Products or
(b) require or compel Xencor, Janssen or any Affiliate of Janssen to dispose of all or any portion of
its properties or assets.

ARTICLE 15
DISPUTE RESOLUTION

15.1 Exclusive  Dispute  Resolution  Mechanism.    The  Parties  recognize  that  a  dispute  may
arise  relating  to  this  Agreement    (a  “Dispute”).    The  term  “Dispute”  excludes  any  Committee
Matter,  which  will  be  subject  to  resolution  under  Section  2.5.    Any  Dispute,  including,  to  the
extent related to this Agreement, disputes that may involve the parent company, subsidiaries, or
Affiliates under common control of any Party, shall be resolved in accordance with this ARTICLE
15.

15.2 Referral  to  Executive  Officers.    Either  Party  may  refer  to  the  Executive  Officers  any
Dispute. The Executive Officers shall discuss any such matter referred to them in good faith and
attempt  to  find  a  mutually  satisfactory  resolution  to  the  issue.  If  the  Executive  Officers  do  not
reach consensus regarding, or do not resolve, such a matter within [***] after the date on which
the matter is referred to the Executive Officers (unless a longer period is agreed to by the Parties),
then the matter may be referred to mediation in accordance with Section 15.3 below.  

15.3 Mediation.

15.3.1 With  respect  to  any  Dispute  that  is  not  resolved  by  the  Executive  Officers  under
Section  15.2,  the  Parties  shall  first  attempt  in  good  faith  to  resolve  such  Dispute  by  confidential
mediation  in  accordance  with  the  then-current  Mediation  Procedure  of  the  International  Institute
for Conflict Prevention and Resolution (“CPR Mediation Procedure”) (www.cpradr.org)

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

85

before initiating arbitration.  The CPR Mediation Procedure shall control, except where it conflicts
with  these  provisions,  in  which  case  these  provisions  control.    The  mediator  shall  be  chosen
pursuant to CPR Mediation Procedure.  The mediation shall be held in New York, New York.

15.3.2 Either  Party  may  initiate  mediation  by  written  notice  to  the  other  Party  for  any
Dispute  that  is  not  resolved  by  the  Executive  Officers  under  Section  15.2.   The  Parties  agree  to
select  a  mediator  within  [***]  of  the  notice,  and  the  mediation  will  begin  promptly  after  the
selection.  The mediation will continue until the mediator, or either Party, declares in writing, no
sooner than after the conclusion of one full day of a substantive mediation conference attended on
behalf  of  each  Party  by  a  senior  business  person  with  authority  to  resolve  the  Dispute,  that  the
Dispute  cannot  be  resolved  by  mediation.    In  no  event,  however,  shall  mediation  continue  more
than [***] days from the initial notice by a Party to initiate meditation unless the Parties agree in
writing to extend that period.

15.3.3 Any  period  of  limitations  that  would  otherwise  expire  between  the  initiation  of

mediation and its conclusion shall be extended until [***]after the conclusion of the mediation.

15.4 Arbitration.  

15.4.1 If the Parties fail to resolve the Dispute in mediation, and a Party desires to pursue
resolution of the Dispute, the Dispute shall be submitted by either Party for resolution in arbitration
pursuant 
then-current  CPR  Non-Administered  Arbitration  Rules  (“CPR  Rules”)
(www.cpradr.org), except where they conflict with these provisions, in which case these provisions
control.  The arbitration will be held in New York, New York.  All aspects of the arbitration shall
be treated as confidential.

the 

to 

15.4.2 The arbitrators will be chosen from the CPR Panel of Distinguished Neutrals, unless
a candidate not on such panel is approved by both Parties.  Each arbitrator shall be a lawyer with at
least 15 years’ experience with a law firm or corporate law department of over 25 lawyers or who
was  a  judge  of  a  court  of  general  jurisdiction.    To  the  extent  that  the  Dispute  requires  special
expertise, the Parties will so inform CPR prior to the beginning of the selection process.

15.4.3 The arbitration tribunal shall consist of three arbitrators, of whom each Party shall
designate  one.    If,  however,  the  aggregate  award  sought  by  the  Parties  is  less  than  [***]  and
equitable relief is not sought, a single arbitrator shall be chosen in accordance with the CPR Rules.
  Candidates  for  the  arbitrator  position(s)  may  be  interviewed  by  representatives  of  the  Parties  in
advance of their selection, provided that all Parties are represented.

15.4.4 The  Parties  agree  to  select  the  arbitrator(s)  within  [***]  days  of  initiation  of  the
arbitration.  The hearing will be concluded within [***] after selection of the arbitrator(s), and the
award  will  be  rendered  within  [***]  of  the  conclusion  of  the  hearing,  or  of  any  post  hearing
briefing, which briefing will be completed by both sides within [***] days after the conclusion of
the hearing.  In the event the Parties cannot agree upon a schedule, then the arbitrator(s) shall set
the schedule following the time limits set forth above as closely as practical.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

86

15.4.5 The hearing will be concluded in [***] hearing days or less.  Multiple hearing days
will  be  scheduled  consecutively  to  the  greatest  extent  possible.    A  transcript  of  the  testimony
adduced at the hearing shall be made and shall be made available to each Party.

15.4.6 The arbitrator(s) shall be guided, but not bound, by the CPR Protocol on Disclosure
of  Documents  and  Presentation  of  Witnesses  in  Commercial  Arbitration  (www.cpradr.org)
(“Protocol”).    The  Parties  will  attempt  to  agree  on  modes  of  document  disclosure,  electronic
discovery,  witness  presentation,  etc.  within  the  parameters  of  the  Protocol.    If  the  Parties  cannot
agree on discovery and presentation issues, the arbitrator(s) shall decide on presentation modes and
provide  for  discovery  within  the  Protocol,  understanding  that  the  Parties  contemplate  reasonable
discovery.

15.4.7 The arbitrator(s) shall decide the merits of any Dispute in accordance with the law
governing  this  Agreement,  without  application  of  any  principle  of  conflict  of  laws  that  would
result in reference to a different law.  The arbitrator(s) may not apply principles such as “amiable
compositeur” or “natural justice and equity.”

15.4.8 The arbitrator(s) are expressly empowered to decide dispositive motions in advance
of any hearing and shall endeavor to decide such motions as would a United States District Court
Judge sitting in the jurisdiction whose substantive law governs.

15.4.9 The arbitrator(s) shall render a written opinion stating the reasons upon which the
award is based.  The Parties consent to the jurisdiction of the United States District Court for the
district  in  which  the  arbitration  is  held  for  the  enforcement  of  these  provisions  and  the  entry  of
judgment  on  any  award  rendered  hereunder.    Should  such  court  for  any  reason  lack  jurisdiction,
any court with jurisdiction may act in the same fashion.

15.4.10  Notwithstanding anything to the contrary in ARTICLE 15, each Party has the right
to  seek injunctive or  equitable  relief  at  any  time  from  any  court  such  as  attachment, preliminary
injunction, replevin, etc. to avoid irreparable harm, maintain the status quo, or preserve the subject
matter of the Dispute.  Rule 14 of the CPR Rules does not apply to this Agreement.

15.5 Waiver.   EACH PARTY HERETO  WAIVES  ITS  RIGHT  TO  TRIAL  OF  ANY  ISSUE
BY JURY.

ARTICLE 16
MISCELLANEOUS

16.1 Assignment; Successors.  Neither Party may assign this Agreement or any of its rights or
obligations  under  this  Agreement  without  the  written  consent  of  the  other  Party;  provided,
however,  that  either  Party  may  assign  this  Agreement  in  its  entirety  without  such  consent  (but
with  notice  to  the  other  Party  following  such  assignment),  to:  (a)  an  Affiliate,  as  long  as  the
assignee remains an Affiliate of the assigning Party, provided that the assigning Party will remain
responsible  for  the  performance  of,  and  primarily  liable  under,  this  Agreement  notwithstanding
such assignment; or (b) a Third Party that acquires all or substantially all of the

87

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

business or consolidated assets of such Party (whether by merger, reorganization, acquisition, sale
or otherwise).  No assignment of this Agreement will be valid and effective unless and until the
assignee agrees in writing to be bound by the terms and conditions of this Agreement.  The terms
and conditions of this Agreement will be binding on and inure to the benefit of the successors and
permitted assigns of the Parties.  Any assignment of this Agreement not in accordance with this
Section 16.1 will be null and void.

16.2
Performance  by  Affiliates.    To  the  extent  that  this  Agreement  imposes  obligations  on
Affiliates  of  a  Party,  such  Party  agrees  to  cause  its  Affiliates  to  perform  such  obligations.  Each
Party  may  use  one  or  more  of  its  Affiliates  to  perform  its  obligations  and  duties  under  this
Agreement,  provided  that  such  Party  provides  prompt  written  notice  to  the  other  Party.    Such
Party will remain liable under this Agreement for the prompt payment and performance of all of
its obligations under this Agreement.

Subcontracting.    Each  Party  (or  its  Affiliate)  may  subcontract  the  performance  of  any
16.3
Research Program activities with respect to the Licensed Products undertaken in accordance with
this  Agreement  to  one  or  more  Third  Parties  (each  such  Third  Party,  a  “Subcontractor”),
provided that any such Third Party must satisfy any subcontractor criteria established by the JRC.
  All  subcontracted  activities  will  be  conducted  pursuant  to  a  written  agreement  between  the
subcontracting Party and the Subcontractor (a “Subcontract”), which will be consistent with the
terms and conditions of this Agreement, will contain confidentiality provisions no less restrictive
than those set forth in ARTICLE 10, and will contain a certification that such Third Party and its
officers, employees and agents have not been debarred, and are not subject to debarment, pursuant
to Section 306 of the United States Federal Food, Drug, and Cosmetic Act, and are not the subject
of a conviction described in such section.  The subcontracting Party will oversee the performance
of its Subcontractors, and each Party will have the right from time to time, but not more than once
per Calendar Year, to audit the performance of the other Party’s Subcontractors.  Notwithstanding
the  foregoing,  the  subcontracting  Party  (or  Party  whose  Affiliate  enters  into  a  Subcontract)  will
remain  liable  under  this  Agreement  for  the  performance  of  all  its  obligations  under  this
Agreement and will be responsible for and liable for compliance by its Subcontractors with the
applicable provisions of this Agreement.

16.4 No Consequential or Punitive Damages.  EXCEPT FOR A BREACH OF ARTICLE 10,
NEITHER  PARTY  HERETO  NOR  ANY  OF  ITS  AFFILIATES  WILL  BE  LIABLE  FOR
INDIRECT,  INCIDENTAL,  CONSEQUENTIAL,  SPECIAL,  EXEMPLARY,  PUNITIVE  OR
MULTIPLE DAMAGES ARISING OUT OF THIS AGREEMENT OR THE EXERCISE OF ITS
RIGHTS UNDER THIS AGREEMENT, OR FOR ANY LOSS OR INJURY TO A PARTY’S OR
ITS AFFILIATES’ PROFITS, REVENUES, BUSINESS OR GOODWILL ARISING FROM OR
RELATING  TO  ANY  BREACH  OF  THIS  AGREEMENT,  REGARDLESS  OF  ANY  NOTICE
OF  SUCH  DAMAGES.    NOTHING  IN  THIS  SECTION  16.4  IS  INTENDED  TO  LIMIT  OR
RESTRICT  THE  INDEMNIFICATION  RIGHTS  OR  OBLIGATIONS  OF  EITHER  PARTY
WITH RESPECT TO INDEMNIFICATION CLAIMS.  

16.5 Choice of Law.  This Agreement will be governed by and interpreted under, and any court
action in accordance with Section 16.6 will apply, the laws of the State of New York excluding:
 (i) its conflicts of laws principles; (ii) the United Nations Conventions on Contracts

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

88

for the International Sale of Goods; (iii) the 1974 Convention on the Limitation Period in the
International Sale of Goods (the “1974 Convention”); and (iv) the Protocol amending the 1974
Convention, done at Vienna April 11, 1980.  Notwithstanding anything to the contrary herein, the
interpretation and construction of any Patents will be governed in accordance with the laws of the
jurisdiction in which such Patents were filed or granted, as the case may be.

16.6
Submission  to  Jurisdiction.    Each  Party  (i)  submits  to  the  jurisdiction  of  the  state  and
federal courts sitting in New York, New York, with respect to actions or proceedings arising out
of or relating to this Agreement in which a Party brings an action in aid of arbitration, (ii) agrees
that all claims in respect of such action or proceeding may be heard and determined in any such
court  and  (iii)  agrees  not  to  bring  any  action  or  proceeding  arising  out  of  or  relating  to  this
Agreement  in  any  other  court,  other  than  an  action  or  proceeding  seeking  injunctive  relief  or
brought to enforce an arbitration ruling issued pursuant to Section 15.4.  Each Party waives any
defense of inconvenient forum to the maintenance of any action or proceeding so brought.  Each
Party may make service on the other Party by sending or delivering a copy of the process to the
Party  to  be  served  at  the  address  and  in  the  manner  provided  for  the  giving  of  notices  in
Section 16.7.    Nothing  in  this  Section  16.6,  however,  will  affect  the  right  of  any  Party  to  serve
legal process in any other manner permitted by Law.

16.7 Notices.  All  notices,  requests,  demands,  waivers  and  other  communications  required  or
permitted  to  be  given  under  this  Agreement  will  be  in  writing  and  deemed  given  if  delivered
personally or sent by overnight courier to the receiving Party, in each case with a copy sent via
electronic mail (if an electronic mail address of the party to whom the relevant communication is
being made has been designated pursuant hereto and remains a working electronic mail address),
at the following addresses (or at such other addresses as will be specified by like notice):

If to Xencor:

[***]

If to Janssen:  

[***]

All such notices, requests, demands, waivers and other communications will be deemed to have
been  received,  if  by  personal  delivery  or  overnight  courier,  on  the  day  delivered  or,  if  by
facsimile,  on  the  next  Business  Day  following  the  day  on  which  such  facsimile  was  sent;
provided,  in  each  case  that  a  copy  is  also  sent  by  electronic  mail  in  accordance  with  the  first
sentence of this Section 16.7.

16.8
Severability.    The  provisions  of  this  Agreement  will  be  deemed  severable  and  the
invalidity or unenforceability of any provision will not affect the validity or enforceability of the
other provisions hereof. If any provision of this Agreement, or the application of such provision to
any Person or any circumstance, is invalid or unenforceable, (a) a suitable and equitable

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

89

provision will be substituted therefor in order to carry out, so far as may be valid and enforceable,
the intent and purpose of such invalid or unenforceable provision and (b) the remainder of this
Agreement and the application of such provision to other Persons or circumstances will not be
affected by such invalidity or unenforceability, nor will such invalidity or unenforceability affect
the validity or enforceability of such provision, or the application of such provision, in any other
jurisdiction.

16.9 Captions.    All  captions  in  this  Agreement  are  for  convenience  only  and  will  not  be
interpreted as having any substantive meaning.

16.10 Further  Actions.    Each  Party  agrees  to  execute,  acknowledge  and  deliver  such  further
instruments  and  to  do  all  such  other  acts  as  may  be  necessary  or  appropriate  to  carry  out  the
purposes and intent of this Agreement.

16.11 Amendment;  No  Waiver.    No  waiver,  modification  or  amendment  of  any  provision  of
this Agreement will be valid or effective unless made in writing and signed by a duly authorized
officer  of  each  Party.  The  failure  of  either  Party  to  assert  a  right  hereunder  or  to  insist  upon
compliance with any term or condition of this Agreement will not constitute a waiver of that right
or excuse a similar subsequent failure to perform any such term or condition.

16.12 Integration.  This  Agreement  constitutes  the  entire  agreement  between  the  Parties  with
respect to the subject matter of this Agreement and supersedes all previous agreements, whether
written or oral. Notwithstanding the authority granted to the Committees under this Agreement,
this Agreement may be amended only in writing signed by properly authorized representatives of
each of Xencor and Janssen. In the event of a conflict between the GDP, on the one hand, and this
Agreement, on the other hand, the terms of this Agreement will govern.

16.13 Independent Contractors; No Agency.  Neither Party will have any responsibility for the
hiring,  firing  or  compensation  of  the  other  Party’s  employees  or  for  any  employee  benefits.  No
employee or representative of a Party, including the Xencor sales representatives, will have any
authority  to  bind  or  obligate  the  other  Party  to  this  Agreement  for  any  sum  or  in  any  manner
whatsoever,  or  to  create  or  impose  any  contractual  or  other  liability  on  the  other  Party  without
said  Party’s  written  approval.  For  all  purposes,  and  notwithstanding  any  other  provision  of  this
Agreement  to  the  contrary,  Janssen’s  legal  relationship  under  this  Agreement  to  Xencor,  and
Xencor’s  legal  relationship  under  this  Agreement  to  Janssen,  will  be  that  of  independent
contractor and will not constitute a partnership, joint venture or agency.

16.14 Force Majeure.  Neither Party will be liable for delay or failure in the performance of any
of its obligations hereunder (other than the payment of money) if such delay or failure is due to
causes beyond its reasonable control, including acts of God, fires, typhoon, floods, earthquakes,
tsunami, pandemics, embargoes, acts of war (whether war be declared or not), terrorism, strikes,
lockouts, pandemics or other civil unrest, or omissions or delays in acting by any governmental
authority  (“Force  Majeure”);  provided,  however,  that  the  affected  Party  promptly  notifies  the
other  Party  and  further  provided  that  the  affected  Party  will  use  its  Diligent  Efforts  to  avoid  or
remove  such  causes  of  non-performance  and  to  mitigate  the  effect  of  such  occurrence,  and  will
continue  performance  with  the  commercially  reasonable  dispatch  whenever  such  causes  are
removed. When such circumstances arise, the Parties will negotiate in

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

90

good faith any modifications of the terms of this Agreement that may be necessary or appropriate
in order to arrive at an equitable solution.

16.15 Counterparts;  Signatures.    This  Agreement  may  be  executed  in  counterparts,  each  of
which counterparts, when so executed and delivered, will be deemed to be an original, and all of
which  counterparts,  taken  together,  will  constitute  one  and  the  same  instrument  even  if  both
Parties have not executed the same counterpart. Signatures provided by facsimile transmission or
by email of a .pdf attachment will be deemed to be original signatures.

16.16 Construction.  References to Sections include subsections, which are part of the related
Section.  Except  as  otherwise  explicitly  specified  to  the  contrary,  (i)  references  to  a  Section,
Article,  Exhibit  or  Schedule  means  a  Section  or  Article  of,  or  a  Schedule  or  Exhibit  to,  this
Agreement and all subsections thereof, unless another agreement is specified; (ii) references to a
particular  statute  or  regulation  include  all  rules  and  regulations  thereunder  and  any  successor
statute,  rules  or  regulations  then  in  effect,  in  each  case,  including  the  then-current  amendments
thereto;  (iii)  words  in  the  singular  or  plural  form  include  the  plural  and  singular  form,
respectively;  (iv)  unless  the  context  requires  a  different  interpretation,  the  word  “or”  has  the
inclusive  meaning  that  is  typically  associated  with  the  phrase  “and/or”;  (v)  terms  “including,”
“include(s),”  “such  as,”  and  “for  example”  as  used  in  this  Agreement  mean  including  the
generality of any description preceding such term and will be deemed to be followed by “without
limitation”; (vi) whenever this Agreement refers to a number of days, such number will refer to
calendar  days  unless  Business  Days  are  specified;  (vii)  when  a  time  period  set  forth  in  this
Agreement ends on a day that is not a Business Day, the last day of such time period will be the
next Business Day; (viii) references to a particular Person include such Person’s successors and
assigns to the extent not prohibited by this Agreement; (ix) all words used in this Agreement will
be construed to be of such gender or number as the circumstances require; (x) the words “hereof,”
“herein,”  “hereby”  and  derivative  or  similar  words  refer  to  this  Agreement  (including  any
Exhibits); (xi) neither Party or its Affiliates will be deemed to be acting “on behalf of” the other
Party  under  this  Agreement,  except  to  the  extent  expressly  otherwise  provided;  and  (xii)
references to sublicensees include direct and indirect sublicensees.

[Signature Page Follows]

91

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

IN WITNESS WHEREOF, the Parties have caused this Collaboration and License Agreement to
be executed by their respective duly authorized officers as of the Execution Date.

XENCOR, INC.

JANSSEN BIOTECH, INC.

By:

/s/ Bassil Dahiyat

By:

/s/ Serge Messerlian            

Name: Bassil Dahiyat

Name: Serge Messerlian             

Title:  CEO                              

Title: President                           

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

      
       
       
    
  
 
  
 
   
   
  
 
  
 
Exhibit 1.8

Exhibit 3.2

Schedule 5.1.1

LIST OF EXHIBITS AND SCHEDULES

Johnson & Johnson Universal Calendar

Research Plan

Janssen Eligible Prostate Products and Xencor Eligible Prostate
Products

Exhibit 10.5.1

Initial Press Release

Schedule 11.5.2

CD28 Binding Domains

Schedule 11.5.10

Certain Patents of Xencor

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Exhibit 1.8

Johnson & Johnson Universal Calendar

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

See attached.

Exhibit 3.2

Research Plan

See attached.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Janssen Eligible Prostate Products and Xencor Eligible Prostate Products

Schedule 5.1.1

[***]

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Exhibit 10.5.1

Initial Press Release

See attached.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Schedule 11.5.2

CD28 Binding Domains

[***]

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Schedule 11.5.10

Certain Patents of Xencor

See attached.

[***] = CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT 
MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN 
MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS  HAVE BEEN MADE.

Consent of Independent Registered Public Accounting Firm

Exhibit 23.1

We consent to the incorporation by reference in the Registration Statement (Nos. 333-192635, 333-216365, and 333-
236607) on Form S-8 and the Registration Statement (No. 333-213700) on Form S-3 of Xencor, Inc. of our reports
dated February 23, 2021, relating to the financial statements and the effectiveness of internal control over financial
reporting of Xencor, Inc., appearing in this Annual Report on Form 10-K of Xencor, Inc. for the year ended December
31, 2020.

/s/ RSM US LLP

Los Angeles, California
February 23, 2021

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 302 OF THE

I, Bassil I. Dahiyat, Ph.D., certify that:

SARBANES-OXLEY ACT OF 2002

Exhibit 31.1

1.

2.

3.

4.

I have reviewed this Annual Report on Form 10-K for the fiscal year ended December 31, 2020 of Xencor, Inc.
(the “Company”);

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;

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 Company as of,
and for, the periods presented in this report;

The Company’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 15(d) – 15(f) for the Company and have:

a)

b)

c)

d)

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 Company,
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;

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;

Evaluated the effectiveness of the Company’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

Disclosed in this report any change in the Company’s internal control over financial reporting that
occurred during the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the
case of an annual report) that has materially affected, or is reasonably likely to materially affect, the
Company’s internal control over financial reporting; and

5.

The Company’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal
control over financial reporting, to the Company’s auditors and the audit committee of the Company’s board of
directors (or persons performing the equivalent functions):

a)

b)

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 Company’s ability to record,
process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant
role in the Company’s internal control over financial reporting.

Date: February 23, 2021

/s/ BASSIL I. DAHIYAT
Bassil I. Dahiyat, Ph.D.
President & Chief Executive Officer

Exhibit 31.2

CERTIFICATION OF THE CHIEF FINANCIAL OFFICER PURSUANT TO SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, John J. Kuch, certify that:

1.

2.

3.

4.

I have reviewed this Annual Report on Form 10-K for the fiscal year ended December 31, 2020 of Xencor, Inc.
(the “Company”);

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;

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 Company as of,
and for, the periods presented in this report;

The Company’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 15(d) – 15(f)) for the Company and have:

a)

b)

c)

d)

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 Company,
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;

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;

Evaluated the effectiveness of the Company’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

Disclosed in this report any change in the Company’s internal control over financial reporting that
occurred during the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the
case of an annual report) that has materially affected, or is reasonably likely to materially affect, the
Company’s internal control over financial reporting; and

5.

The Company’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal
control over financial reporting, to the Company’s auditors and the audit committee of the Company’s board of
directors (or persons performing the equivalent functions):

a)

b)

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 Company’s ability to record,
process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant
role in the Company’s internal control over financial reporting.

/s/ JOHN J. KUCH
John J. Kuch
Chief Financial Officer (Principal Financial Officer)

Date: February 23, 2021

Exhibit 32.1

CERTIFICATION
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

In connection with the Annual Report on Form 10-K of Xencor, Inc. (the “Company”) for the period ended

December 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Bassil I.
Dahiyat, Ph.D., as President and Chief 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.

2.

the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act
of 1934, as amended; and

the information contained in the Report fairly presents, in all material respects, the financial condition
and results of operations of the Company.

Date: February 23, 2021

/s/ BASSIL I. DAHIYAT
Bassil I. Dahiyat, Ph.D.
President & Chief Executive Officer

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is

not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be
incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any
general incorporation language in such filing. A signed original of this written statement required by Section 906 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.

Exhibit 32.2

CERTIFICATION
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

In connection with the Annual Report on Form 10-K of Xencor, Inc. (the “Company”) for the period ended

December 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, John J.
Kuch, as 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.

2.

the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act
of 1934, as amended; and

the information contained in the Report fairly presents, in all material respects, the financial condition
and results of operations of the Company.

Date: February 23, 2021

/s/ JOHN J. KUCH
John J. Kuch
Chief Financial Officer

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is

not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be
incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any
general incorporation language in such filing. A signed original of this written statement required by Section 906 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.