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Xencor, Inc.

xncr · NASDAQ Healthcare
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Industry Biotechnology
Employees 250
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FY2021 Annual Report · Xencor, Inc.
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Table of Contents

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, 2021
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, 2021 was $2,000,288,972.

The number of outstanding shares of the registrant’s common stock, par value $0.01 per share, as of February 16, 2022 was 59,375,320.

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, 2021.

    
    
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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, 2021
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
[Reserved]
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements With Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information

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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124

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

● 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.

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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 XmAb® drug candidates from our proprietary protein
engineering technology platforms. We also use our protein engineering capabilities to increase our understanding of protein
structure and interactions and to design new technologies and XmAb development candidates with improved properties. In
addition to engineering protein-target interactions, our approach to protein design includes engineering Fc domains, 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 XmAb Fc domains can be readily
substituted for natural Fc domains.

Our protein engineering capabilities and Fc technologies enable us and our partners to develop XmAb antibodies

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

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

● 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 bispecific technology and protein engineering capabilities enable us to rapidly advance multiple drug
candidates into clinical development. We and our partners are enrolling patients in multiple mid-stage and
early-stage clinical studies to evaluate our XmAb bispecific antibody drug candidates and engineered cytokine
drug candidates. We and our partners plan to advance additional bispecific antibodies and cytokines into
clinical development in the future.

2. Build and manage a large and diversified portfolio of XmAb drug candidates. We create new XmAb

bispecific antibody and cytokine product candidates to exploit the novel mechanisms of action enabled by our
protein engineering technology platforms, and we advance them into our portfolio of preclinical and clinical-
stage assets. We regularly evaluate our portfolio of candidates and make additional investments in those
candidates that present promising early clinical and scientific data, partner certain drug candidates to third-party
biotechnology and pharmaceutical companies, and will stop development of candidates based on the evaluation
of emerging clinical and scientific data and the competitive environment for such programs.

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3. Leverage our protein engineering capabilities, XmAb Fc domains, 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 Fc technologies and our ability to generate

multiple drug candidates efficiently provides us opportunities to generate revenue from licensing and
collaboration arrangements. In 2021, we received total proceeds of $204.9 million in upfront payments,
milestone payments and royalties from such arrangements.

Create new XmAb drug candidates and investigate novel combination therapies. We seek to leverage our

XmAb Fc domains and protein engineering capabilities with partners to create novel XmAb drug candidates,
and to evaluate our XmAb drug candidates in combination with other therapeutic agents, when applicable. 

Identify new indications for our pipeline of drug candidates. We continue to support Investigator
Sponsored Trials (ISTs) in which investigators may explore additional therapeutic indications with XmAb drug
candidates.

4. Broaden the functionality of our XmAb Fc technology platforms. We are conducting further research into the
function and application of antibody Fc domains in order to expand the scope of our XmAb Fc technology
platforms. We use the modularity of our XmAb bispecific Fc domains to engineer bispecific antibodies and
cytokines in a variety of structural formats. For example, CD3 bispecific antibodies of a mixed valency format,
i.e., the XmAb 2+1 bispecific antibody, may preferentially kill tumor cells that have higher target expression
than normal cells, 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.

5. Continue to expand our patent portfolio protecting our Fc technologies and XmAb drug candidates. We seek

to expand our intellectual property estate and protect our proprietary Fc technologies, our development
programs, and XmAb drug 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 and for partnered product candidates that incorporate one of our Fc technologies.

XmAb Bispecific Fc Domain and New Multi-Specific Antibody Formats

Our modular approach to protein engineering is a distinguishing feature of our Fc technologies. This inherent

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

CD3 candidates: CD3 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 advancing two CD3
bispecific antibody candidates in Phase 2 clinical development: plamotamab and tidutamab.

We have significantly expanded the potential of our CD3 bispecific antibodies with the multi-specific XmAb 2+1

bispecific antibody format, utilizing two identical tumor targeting domains and one CD3 targeting domain. The affinities
for antigen binding are engineered to enable 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

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believe that these properties will be particularly important when developing bispecific antibodies against many solid tumor
targets, where standard monovalent targeting of tumor antigens could lead to poor tolerability because such targets are
often expressed on a range of normal tissues, including critical organs. We are currently initiating a Phase 1 study for
XmAb819, an ENPP3 x CD3 bispecific antibody, which is engineered with the XmAb 2+1 bispecific antibody format.

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 selective 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 two collaborations with Janssen Biotech, Inc. (Janssen), we are applying our bispecific technologies
to create and characterize CD28 bispecific antibody candidates against a prostate tumor target, and against multiple B cell
targets.

TME activator candidates: Our tumor microenvironment (TME) activators have been designed to promote tumor-
selective T-cell activation by targeting multiple checkpoints or co-stimulating receptors. These candidates also incorporate
our Xtend™ technology for longer half-life. We are currently advancing vudalimab in Phase 2 clinical development and are
conducting Phase 1 studies for two additional TME activator candidates: XmAb841 and XmAb104.

Cytokine candidates: We have also expanded the use of our XmAb bispecific Fc domain to engineer novel

cytokine candidates, which are not antibodies, but fusions of a heterodimeric Fc domain and immune signaling proteins.
We engineer our cytokine candidates with reduced potency to improve therapeutic index and with our Xtend technology for
longer half-life. Two XmAb cytokine candidates are being evaluated in Phase 1 studies: XmAb306 (RO7310729) and
XmAb564.

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

Other XmAb Fc Domains

We have also created additional XmAb Fc domains, and we have successfully entered partnerships for these
technologies and for XmAb drug candidates that incorporate them. We will continue to seek additional partnering and
licensing opportunities for these Fc domains. 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.

Approved or Authorized Medicines Engineered with XmAb Fc Domains

Currently three medicines that have been developed with our XmAb Fc domains are now marketed or made

available by our partners. These medicines generated $80.3 million in royalty revenue for us in 2021, which has partially
offset our internal development costs.

● Sotrovimab: Vir Biotechnology, Inc. and its partner GlaxoSmithKline Plc have made available sotrovimab, an
antibody that targets the SARS-CoV-2 virus, which received an emergency use authorization (EUA) from the
United States Food and Drug Administration (FDA) for the treatment of mild-to-moderate COVID-19 in high-
risk adults and pediatric patients. Sotrovimab has been granted a marketing authorization in the European Union
(EU), approved via Japan’s Special Approval for Emergency Pathway in Japan, and granted conditional,

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provisional, or temporary authorizations in 15 other countries. GSK supplies sotrovimab under the name Xevudy.
Sotrovimab incorporates our Xtend Fc domain for longer duration of action.

● Ultomiris® (ravulizumab-cwvz): Alexion’s Ultomiris is approved in the U.S., Europe, and Japan for the treatment
of 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®.

● Monjuvi® (tafasitamab-cxix): In 2020, the FDA approved Monjuvi under accelerated approval. Monjuvi is a

CD19-directed cytolytic antibody indicated 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). In
August 2021, the European Commission granted conditional marketing authorization for Minjuvi® (tafasitamab)
in combination with lenalidomide, followed by tafasitamab monotherapy, for the treatment of adult patients with
relapsed or refractory diffuse large B-cell lymphoma (DLBCL) who are not eligible for autologous stem cell
transplantation (ASCT). MorphoSys is also conducting studies of tafasitamab in additional B-cell indications.
Tafasitamab was created and initially developed by us. Tafasitamab is co-marketed by Incyte and MorphoSys
under the brand name Monjuvi in the U.S. and is marketed by Incyte under the brand name Minjuvi in the EU.
Incyte has exclusive commercialization rights to tafasitamab outside the U.S. Monjuvi® and Minjuvi® are
registered trademarks of MorphoSys AG.

Drug Candidates in Clinical Development

There are currently 21 clinical-stage drug candidates or marketed medicines that have been developed with one or

more of our Fc technologies.

A partner is also advancing a drug candidate that incorporates our DN-TNF technology.

Wholly Owned
Vudalimab
Tidutamab
XmAb104
XmAb841
XmAb564

Co-developed with Partners
Plamotamab
XmAb306/RG6323

Marketed by Partners
Ultomiris*
Monjuvi*
Sotrovimab

Developed by Partners
VIR-3434
SARS-CoV-2 mAb Duo (BMS)
Obexelimab
AMG 509
Novartis bispecific antibody
AIMab7195
Xpro1595/INB03
VIR-7832
VIR-2482
OMS906

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

We regularly evaluate our portfolio of candidates and make additional investments in candidates with promising
early-stage clinical data, partner out other candidates, and stop development of candidates where early clinical data does
not support further investment. During 2021:

● We initiated Phase 2 studies for our vudalimab and tidutamab programs,

● We licensed the worldwide rights to our plamotamab and obexelimab programs to strategic

biopharmaceutical partners, and

● We stopped development of the vibecotamab program.

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XmAb Bispecific Fc Drug Candidates in Clinical Development

Currently, 9 XmAb drug candidates that have been engineered with our XmAb bispecific Fc domain are in clinical

development.

● Five candidates are wholly owned and are being evaluated by us in Phase 2 or Phase 1 studies;

● Two candidates are being co-developed with partners; and

● Two additional candidates are being advanced by our partners.

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. Vudalimab (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 for patients with metastatic
castration-resistant prostate cancer (mCRPC) and other solid tumor types. Xencor has initiated a Phase 2 clinical
study of vudalimab in patients with mCRPC, as a monotherapy or in combination depending on molecular
subtype, and a Phase 2 clinical study in patients with advanced gynecologic and genitourinary malignancies, as
well as clinically defined high-risk mCRPC. 

We presented updated data from the Phase 1 dose-escalation and expansion study at the Annual Meeting of the
Society for Immunotherapy of Cancer (SITC) in November 2021. 110 patients had been treated at the 10 mg/kg
recommended dose level in dose-escalation (n=7) and in five dose expansion cohorts: melanoma (n=20), renal
cell carcinoma (RCC, n=21), non-small cell lung cancer (NSCLC, n=20), CRPC (n=21) and other cancers
without approved checkpoint therapies (n=21). The safety analysis includes all 110 patients, who were a median
of 65 years old and were heavily pretreated, having a median of four prior systemic therapies. 65% of patients had
received at least one prior checkpoint therapy, and 25% had received at least two prior checkpoint therapies.
Vudalimab was generally well-tolerated, and the most common treatment-related adverse events were immune-
related adverse events (irAEs). The most common irAEs of any grade were rash (45.5%), pruritus (30.9%),
transaminase increases (23.6%), diarrhea (11.8%), hypothyroidism (9.1%), infusion related reaction (8.2%) and
myalgia (8.2%).

The efficacy analysis included 78 evaluable patients receiving any amount of vudalimab, who had been followed
for at least two cycles. Complete responses were observed in a patient with BRCA1+ high-grade serous ovarian
cancer and in a patient with melanoma. Partial responses were observed in patients with melanoma (n=2), RCC
(n=3), NSCLC (n=2) and CRPC (n=2). The objective response rate (ORR) across cohorts was 14.1% (11/78). All
responses in patients with melanoma and CRPC and two responses in patients with RCC were confirmed. All
responders, except those with CRPC, had received prior checkpoint inhibitor therapy. The median duration of
response, unadjusted, for all responders was 18.3 weeks. The median duration of response, unadjusted, for
patients with RCC was 24.1 weeks, and two patients remained on treatment.

Of the 12 efficacy-evaluable patients with CRPC, four had measurable disease and follow-up RECIST
assessments, including the two CRPC responders. Six additional patients with CRPC, but without measurable
disease, experienced a best overall response of non-CR/non-PD, as stable disease cannot be determined without
measurable disease. The two CRPC responders had visceral and nodal metastases, had response durations of 41.3
and 27.0 weeks, were without progression on bone scans and had confirmed prostate-specific antigen (PSA)
reductions of more than 50% from baseline. Among twelve patients with baseline and follow-up PSA
assessments, including the two responders, 33% (4/12) had PSA reductions greater than 50%.

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

receptor on T cells. In October 2021, we entered into a global collaboration and license agreement with Janssen to
advance plamotamab and XmAb CD28 bispecific antibody combinations for the treatment of patients with B-cell
malignancies, which expands our strategy to develop multiple highly active, chemotherapy-free regimens to treat
patients with B-cell cancers. Janssen received worldwide exclusive development and commercial rights

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to plamotamab, and we will collaborate with Janssen on further clinical development of plamotamab, with us
paying 20% of costs, including those for a subcutaneous formulation study anticipated to enter clinical trials in
2022. We will continue, at our own expense, a Phase 1/2 combination study of plamotamab, tafasitamab
(Monjuvi), and lenalidomide in patients with relapsed or refractory diffuse large B cell lymphoma (DLBCL), an
aggressive type of non-Hodgkin lymphoma, and we plan to initiate the study in early 2022.

We presented updated data from Part B and Part C of a Phase 1 dose-escalation study at the American Society of
Hematology Annual Meeting in December 2021. Part B escalated dosing on administrations after the priming
dose (doses between 80 and 360 mcg/kg). Part C established a step-up dosing regimen with higher, flat and less
frequent dosing. The schedule, an intravenous, 50 mg flat dose every two weeks after step-up dosing during the
first two cycles of treatment, was generally well tolerated and was determined to be the recommended Phase 2
dose.

The safety population included 50 patients in Part B (38 DLBCL, 12 FL) and 14 patients in Part C (8 DLBCL, 4
FL, 1 marginal zone lymphoma, 1 mantle cell lymphoma). Patients were heavily pretreated. The most common
Grade 3 or 4 treatment-emergent adverse events (AEs) across all patients were anemia (21%), neutropenia (19%),
hypophosphatemia (11%), thrombocytopenia (11%) and lymphopenia (10%). Four patients (5%) experienced
Grade 3 or 4 cytokine release syndrome (CRS), each instance on the first dose, and no patients experienced Grade
3 or 4 CRS in Part C of the study. The rate of CRS of any grade fell from 74% in Part B to 57% in Part C. CRS
was generally manageable with premedication. The efficacy analysis included 47 evaluable patients with either
DLBCL or FL who were treated in Part B (n=38) or in Part C (n=9). The ORR was 51% (24/47), and complete
responses were observed in 12 patients (26%). The median duration of response was 225 days for DLBCL and
171 days for FL, with six patients continuing to respond to plamotamab monotherapy.

In Part C, patients had generally more advanced disease and poorer responses to prior therapy. Of the 14 patients
in Part C, eight patients received prior CAR-T and three patients received NK cell therapy; two of these patients
received both. All eight patients with DLBCL received prior CAR-T therapy. In Part C, safety events were
generally mild or moderate in severity. Grade 3 or 4 AEs experienced by more than 5% of patients included
anemia (14%), lymphopenia (14%) and one patient each (7%) experiencing neutropenia, thrombocytopenia,
decreases in neutrophil count, transaminase increases, fatigue and gamma-glutamyl transferase increases. The
ORR was 100% (4/4) for FL, and CRs were observed in two patients (50%). For DLBCL, the ORR was 40%
(2/5), and a CR was observed in one patient (20%). All 5 evaluable patients with DLBCL received prior CAR-T
therapy, and two evaluable patients with DLBCL received prior NK cell therapy.

Expansion cohorts are actively recruiting patients with DLBCL and FL and are dosing using the recommended
Phase 2 regimen to further evaluate the safety and efficacy of plamotamab monotherapy. We plan to present data
from these cohorts in the second half of 2022. 

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

neuroendocrine-like tumor types, and CD3. Dose-escalation and expansion data from the Phase 1 study in
patients with neuroendocrine tumors (NET) indicates that tidutamab was generally well tolerated at the
recommended dose identified for the expansion portion of the study. Tidutamab induced sustained activation of
cytotoxic T cells and engagement of the SSTR2 target and demonstrated an encouraging safety profile. We are
enrolling patients in a Phase 2 clinical study for tidutamab in patients with Merkel cell carcinoma and small cell
lung cancer, which are SSTR2-expressing tumor types known to be responsive to immunotherapy. 

4. XmAb306 (RO7310729) is an IL15/IL15-receptor alpha complex fused to our bispecific Fc domain

(IL15/IL15Rα-Fc). This cytokine was engineered for reduced potency, and the Fc domain incorporates our Xtend
technology for extended half-life. Xencor is co-developing the program in collaboration with Genentech, a
member of the Roche Group. Genentech is conducting a Phase 1 dose-escalation study of XmAb306 as a single
agent and in combination with atezolizumab. Additional studies of XmAb306 in combination with other agents
are being planned.

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In November 2021, we announced preliminary data from the Phase 1 study, while further dose escalation in both
study arms continues. At the time, the study had enrolled six cohorts in a monotherapy arm and four cohorts in an
atezolizumab combination arm. XmAb306 was generally well tolerated as both a monotherapy and in combination
with atezolizumab. No dose-limiting toxicities or treatment-related serious adverse events had been observed.
Assessments of pharmacokinetics indicated that XmAb306 has a multi-day circulating half-life, which is
consistent with its reduced-potency design and data generated in preclinical studies. Unconfirmed responses, as
evaluated by RECIST criteria, had been observed in multiple tumor types, including in a patient treated with
XmAb306 monotherapy. The study had recently reached dose levels that promote T cell activity, and evidence of
peripheral effector T cell proliferation had been observed. Consistent and robust dose-dependent natural killer
(NK) cell expansion and NK cell accumulation upon repeat dosing had been observed for multiple NK cell
subsets, including mature NK cells. Significant NK cell expansion and accumulation was observed beginning in
lower dose cohorts, and at higher dosing cohorts NK cell expansion had reached 40- to 100-fold higher levels than
baseline and had been sustained for weeks throughout dosing.

5. XmAb104 is a bispecific antibody that targets PD-1 and ICOS, an immune co-stimulatory receptor, and is being
developed in multiple oncology indications. We are conducting 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 dose expansion portion of the study,
evaluating XmAb104 as a monotherapy and in combination with ipilimumab, an anti-CTLA4 antibody.

6. 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 and conducting 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
recently completed dose escalation in monotherapy and pembrolizumab combination cohorts and are enrolling in
the expansion portion of the study.

7. XmAb564 is a monovalent, potency-reduced interleukin-2 Fc (IL-2-Fc) fusion protein, engineered to selectively
activate and expand regulatory T cells (Tregs) for the potential treatment of patients with autoimmune diseases.
XmAb564 is engineered with reduced binding affinity for IL-2's beta receptor and increased binding affinity for
its alpha receptor. In preclinical studies, XmAb564 was well-tolerated, promoted the selective and sustained
expansion of Tregs and exhibited a favorable pharmacokinetic profile. We are conducting a randomized, double-
blind, placebo-controlled Phase 1 clinical study to evaluate the safety and tolerability of a single dose of
XmAb564, administered subcutaneously in healthy adult volunteers.

8. AMG 509 is a STEAP1 x CD3 2+1 bispecific antibody that our partner Amgen is advancing for the treatment of
patients with prostate cancer. The XmAb 2+1 multivalent format enables higher binding capability for STEAP1
expressing cells. Amgen is currently enrolling patients in a Phase 1 study of AMG 509 in patients with mCRPC.
In February 2022, Amgen presented encouraging, preliminary pharmacodynamic activity by induction of percent
maximum PSA decline among 30 patients in the study, which provides an early signal of activity and validation
of the potential of the XmAb 2+1 format.

9. XmAb819 is a first-in-class ENPP3 x CD3 XmAb 2+1 bispecific antibody that we are developing for patients with
renal cell carcinoma (RCC). The XmAb 2+1 multivalent format enables greater selectivity for ENPP3 expressing
tumor cells compared to normal cells, which also express ENPP3 at lower levels. We are initiating a Phase 1
study evaluating XmAb819 in patients with RCC.

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.

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XmAb, Xtend, and Cytotoxic Fc Drug Candidates in Clinical Development

Currently, two drugs engineered with our Xtend Fc Domain and one drug we engineered with our XmAb
Cytotoxic Fc Domain are marketed commercially by partners. In addition to these approved drugs, our partners are
advancing six clinical-stage programs with antibodies engineered with XmAb, Xtend, and/or Cytotoxic Fc Domains,
including:

● Vir Biotechnology, Inc.: Vir is advancing three candidates in clinical development. VIR-3434 is being evaluated
in a Phase 2 combination study as a potential treatment for patients with hepatitis B virus infection. VIR-2482 is
being evaluated in a Phase 1/2 study as a universal prophylactic for influenza A. VIR-7832 is being evaluated in a
Phase 1b/2a trial of adults with mild-to-moderate COVID-19;

● Bristol-Myers Squibb: Bristol-Myers Squibb’s SARS-CoV-2 mAb Duo antibody combination therapy (BMS-
986414 + BMS-986413) is being evaluated in the Phase 2/3 NIH ACTIV-2 trial in treating COVID-19 in
outpatients;

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

antibodies that incorporate our Fc technologies; and

● Our partners are conducting preclinical studies of additional drug candidates engineered with these XmAb Fc

domains.

Other Clinical Stage Drug Candidates

● AIMab7195 (XmAb7195) uses our XmAb Immune Inhibitor Fc Domain and is designed to reduce blood 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. In November 2021, we
licensed this drug candidate to Zenas BioPharma, which is developing this candidate in autoimmune disease.

● Xpro1595 is a proprietary TNF inhibitor candidate which we licensed to INmune Bio, Inc., in October 2017.

INmune is currently advancing Xpro1595 through clinical development for patients with Alzheimer’s disease,
mild cognitive impairment and treatment-resistant depression.

Collaborations, Partnerships and Licensing Arrangements

A key part of our business strategy is to leverage our protein engineering capabilities, XmAb technologies, and

XmAb 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: Janssen Biotech, Inc., Genentech, MorphoSys AG, Nestlé S.A., Zenas BioPharma, INmune

Bio, Inc.

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

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

Bristol-Myers Squibb Company, Novartis AG, Omeros Corporation, Viridian Therapeutics, Inc., Astria
Therapeutics, Inc.

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

Product Licenses

Product licenses are arrangements in which we license to third parties partial or full rights to develop and
commercialize our internally developed drug candidates. 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.

Janssen Biotech, Inc.

In October 2021, we entered into an agreement with Janssen Biotech, Inc. (Janssen) to develop, manufacture, and

commercialize plamotamab and pursuant to which we, together, will conduct research and development activities to
discover novel CD28 bispecific antibodies against undisclosed B cell tumor targets. Janssen will receive exclusive
worldwide rights, subject to certain Xencor opt-in rights, to develop, manufacture and commercialize pharmaceutical
products that contain one or more of such CD28 bispecific antibodies.

We received a $100.0 million upfront payment, and Johnson & Johnson Innovation, JJDC, Inc., purchased $25.0

million of newly issued unregistered shares of our common stock. In addition, we are eligible to receive milestone
payments and royalties on net sales as follows:

● Plamotamab. We are eligible to receive up to a total of $517.5 million in milestone payments, which includes

$120.0 million in development milestones, $137.5 million in regulatory milestones, and $260.0 million in sales
milestones, as well as tiered royalties in the mid-teen to low-twenties percent range on net sales of products
containing plamotamab, including CD28/plamotamab combination products.

● CD28 Licensed Antibodies. We are eligible to receive up to a total of $670.0 million in milestone payments,

which includes an aggregate of $169.4 million in development milestones and $240.6 million in regulatory
milestones. For any products containing CD28 bispecific antibodies, but excluding CD28/plamotamab
combination products, we are eligible to receive $260.0 million in sales milestones, as well as tiered royalties in
the high-single digit to low-double digit range on net sales.

We are collaborating with Janssen on further clinical development of plamotamab with Janssen paying 80% and

the Company paying 20% of costs. We are conducting, at our own expense, a clinical collaboration to evaluate the
combination of plamotamab, tafasitamab, and lenalidomide in patients with B-cell lymphoma after which Janssen may opt
into cost sharing to further develop the combination after establishing proof of concept.

We are generally responsible for conducting research activities, and Janssen is generally responsible for all

development, manufacturing, and commercialization activities for CD28 bispecific antibodies that are advanced.
Independent of plamotamab development activities, upon clinical proof-of-concept for a CD28 bispecific antibody that is
being developed outside of a plamotamab combination, we have the right to opt-in to fund 15% of development costs and,
if we opt in to fund such development costs, to perform up to 30% of the detailing efforts in the United States. We would
then be eligible for low-double digit to mid-teen percent royalties on net sales of those products.

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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
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.

MorphoSys AG

In July 2020, the FDA approved Monjuvi® (tafasitamab-cxix) in combination with lenalidomide for treating

certain patients with DLBCL, and the European Commission granted conditional marketing authorization to tafasitamab
for treating certain patients with DLBCL, which is marketed as Minjuvi® in Europe, in August 2021. In 2010, we licensed
exclusive worldwide rights to develop and commercialize tafasitamab (formerly MOR208 and XmAb5574) to MorphoSys.
Tafasitamab, which we engineered with an XmAb Cytotoxic Fc Domain, is the second XmAb medicine to be approved by
the FDA.

In 2021, we earned $12.5 million in development milestones and royalties of $5.9 million on net sales. We are

also eligible to receive up to $85.5 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. Tafasitamab is co-marketed by Incyte and MorphoSys
under the brand name Monjuvi® in the U.S., and is marketed by Incyte under the brand name Minjuvi® in the EU. Incyte
has exclusive commercialization rights to tafasitamab outside the U.S.

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.

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, an option to acquire up to 10% of the outstanding shares of INmune for $10.0 million, and an option to
acquire 108,000 shares of common stock. In 2021, we sold the option to acquire up to 10% of INmune, and we received
$15.0 million in cash proceeds and an additional 192,533 share of INmune common stock. We also exercised the option to
acquire 108,000 shares of common stock for total proceeds of $0.8 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 planning Phase 2 studies in
Alzheimer’s disease, mild cognitive impairment, and treatment-resistant depression, as Xpro1595; Phase 2 studies in
patients with non-alcoholic steatohepatitis, as LIVNate; and additional studies in MUC4-positive cancers, as INB03.

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Zenas BioPharma (Cayman) Limited

In November 2020, we entered into an agreement with Zenas BioPharma (Cayman) Limited (Zenas) 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 XmAb10171. These programs incorporate an Xtend Fc
Domain, a Cytotoxic Fc Domain, or both. We received a 15% equity interest in Zenas, and we will also receive royalties on
net sales of approved products in the mid-single digit to mid-teen percentage range.

In November 2021, we entered into a second agreement with Zenas to which we licensed the exclusive worldwide

rights to develop and commercialize obexelimab, a bifunctional antibody that targets CD19 with its variable domain and
uses our XmAb Immune Inhibitor Fc Domain. Zenas issued a warrant giving us the right to acquire additional Zenas
equity, such that our total equity in Zenas would be 15% of its fully diluted capitalization following the closing of Zenas’
next round of equity financing, subject to certain requirements. We are also eligible to receive up to $470.0 million based
on the achievement of certain clinical development, regulatory and commercialization milestones and are eligible to
receive tiered, mid-single digit to mid-teen percent royalties upon commercialization of obexelimab, dependent on
geography. Zenas will have sole responsibility for advancing the research, development, regulatory and commercial
activities of obexelimab worldwide.

Novel Bispecific Antibody Collaborations

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

bispecific antibody using one or more of our 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. (Janssen), 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 conducted 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.

In 2021, we received a $5.0 million milestone payment related to Janssen selecting a candidate for further
development, and we are eligible to receive an additional $156.9 million in development milestones as the program
advances.

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. Astellas was granted a worldwide exclusive license, with the right to sublicense
products in the field created by the research activities. Astellas has selected a bispecific antibody developed under the

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collaboration, ASP2138, a CLDN18.2 x CD3 bispecific antibody, for further development to treat patients with gastric,
gastroesophageal, and pancreatic cancers. 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.

Amgen 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 AMG 509 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. Novartis is conducting a Phase 1 study of
an undisclosed bispecific antibody candidate and we received a $10.0 million milestone payment for this program in 2020.

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 Fc domains 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

FDA for commercial marketing. It is approved in the U.S. and multiple global markets for the treatment of 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 2021, we recorded royalty revenue of $22.2 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.

Sotrovimab, an antibody that targets the SARS-CoV-2 virus, has received an emergency use authorization from

the FDA and temporary authorizations in multiple global markets for the treatment of mild-to-moderate COVID-19 in
high-risk adults and pediatric patients. In addition, Vir is evaluating VIR-7832 in a Phase 1b/2a trial of adults with mild-

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to-moderate COVID-19. In March 2020, we entered into an agreement in which we provided Vir a non-exclusive license to
our Xtend technology to extend the half-life of novel antibodies, including sotrovimab, that Vir is investigating as potential
treatments 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 percentage range. During 2021, we recorded estimated royalty revenue of $52.2 million.

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 have received a total of $1.5 million in
upfront and milestone payments, and we are eligible to receive additional milestones of $154.5 million, including $4.5
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 2 combination study as a potential treatment for patients with hepatitis B virus
infection.

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 broadly neutralizing anti-HIV antibodies. Gilead is
responsible for all development and commercialization activities. For each licensed antibody, 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.

Bristol-Myers Squibb Company

In May 2021, we entered into an agreement with Bristol-Myers Squibb Company (BMS), in which we provided

BMS a non-exclusive license to our Xtend Fc technology to extend the half-life of antibodies that specifically bind to
SARS-CoV-2. BMS is responsible for all research, development, regulatory and commercial activities. We are eligible to
receive royalties on net sales of approved products in the low-single digit percentage range. BMS is evaluating the SARS-
CoV-2 mAb Duo antibody combination therapy (BMS-986414 + BMS-986413) in the Phase 2/3 NIH ACTIV-2 trial in
treating COVID-19 in outpatients.

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, OMS906, and options to apply our Xtend Fc technology to three additional antibodies. Omeros is responsible for
all development and commercialization activities. OMS906, a MASP-3 targeted antibody, is being evaluated in a Phase 1
study in patients with PNH and other alternative pathway disorders. 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.

In December 2020, we entered into an agreement with Viridian Therapeutics, Inc., in which we provided Viridian

a non-exclusive license to our Xtend Fc technology and an exclusive license to apply our Xtend Fc technology to
antibodies targeting IGF-1R. 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.

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In December 2021, we entered into a second agreement with Viridian for a non-exclusive license to certain
antibody libraries developed by us. Under the agreement, Viridian received a one-year research license to review the
antibodies and the right to select up to three antibodies for further development. Viridian is responsible for all further
development of the selected antibodies. We received an upfront payment of 394,737 shares of Viridian common stock
valued at $7.5 million and are eligible to receive development, regulatory and sales milestones in addition to royalties on
net sales of approved products under the agreement.

Astria Therapeutics, Inc/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. Catabasis subsequently changed its name to Astria Therapeutics, Inc. 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, Fc 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.

MorphoSys AG

In November 2020, we entered into a strategic collaboration with MorphoSys AG and Incyte to conduct clinical

studies to investigate the chemo-therapy free 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.

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 2021, we extended the agreement for an additional year at the same
level of committed funding.

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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 own proprietary technologies. 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, 2021, we had 254 full-time employees, representing a 26% increase in our employee
workforce as compared to December 31, 2020. Of these, 205 were engaged in research and development activities, and 49
were engaged in business development, information systems, facilities, human resources, or administrative support. Of
these employees, 65 hold Ph.D. degrees, and 10 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 of December 31, 2021, was 57% non-white and 56%
women. In addition, as of December 31, 2021, 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 and employee health and safety policies that provide for the health, safety, and

welfare of our employees. We continue practices that address the COVID-19 pandemic consistent with government
guidelines to mitigate and prevent the spread of disease, such as masking, social distancing, contact tracing, and
encouraging vaccinations. In 2021, in connection with the ongoing pandemic we continued the following practices:

● Provided a remote or hybrid work option for all non-laboratory staff with technical support, training, and
equipment to enable employees to continue to perform their responsibilities while working remotely; and

● Conducted safety procedures for all onsite staff which includes mandatory weekly onsite SARS-CoV-2 virus

testing for all employees and their household members, reimbursement of 100% of medical insurance costs for
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.

Compensation, Benefits, and Development

We provide compensation packages designed to attract, retain, and motivate 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

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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. All
employees are eligible to participate in the Employee Stock Purchase Plan where they can purchase shares of Xencor
common stock at a discounted price. This plan, and our other equity compensation plans, assists us in building long-term
relationships with our employees and aligns the interest of employees with stockholders. We also 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. 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.

We 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. 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, vudalimab, tidutamab,
XmAb841, XmAb104, XmAb306, and XmAb564: 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 2022 there will be approximately 1.9 million new cases of cancer and
approximately 609,360 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 2030 are projected to reach at least $245.6 billion.

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 1,300 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.

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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
Tidutamab
Vudalimab, XmAb841, XmAb104
XmAb564
XmAb819
XmAb306

Partnered Products
Monjuvi (tafasitamab)
Ultomiris
AIMab7195 (XmAb7195)
Sotrovimab
Obexelimab (XmAb5871)
Plamotamab

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
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.
2025 U.S.; 2028 Ex-U.S.
2029 U.S.; 2028 Ex-U.S.
2035 U.S. and Ex-U.S.

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 bio similarity 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.

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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. 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. We have used third party manufacturers for all our bispecific
antibody and cytokine candidates which include: plamotamab, tidutamab, vudalimab, XmAb841, XmAb104, XmAb306,
XmAb564, and XmAb819. 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. 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.

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: plamotamab, tidutamab, vudalimab, 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%.

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Selexis has manufactured cell lines for certain of our bispecific antibody and cytokine drug candidates, and we

currently have rights to obtain commercial licenses to the Selexis cell line for the following bispecific antibody and
cytokine candidates: plamotamab, tidutamab, vudalimab, XmAb841, XmAb104, XmAb306, XmAb564, and XmAb819.

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. 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%.

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 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

XmAb819 program.

Master Services Agreement with WuXi Biologics (Hong Kong) Limited

In February 2021, we entered into a Master Services Agreement (WuXi Agreement) with WuXi Biologics (Hong

Kong) Limited (WuXi). Under the terms of the WuXi Agreement, WuXi and its affiliates will perform manufacturing,
analytical, development and other services for Xencor in accordance with applicable regulations. The WuXi Agreement
includes customary rights to replacement of non-conforming products. The WuXi Agreement may be terminated by either
party for a breach by the other party that is not remedied within 45 days (or 10 days for a non-payment breach), or if the
other party is subject to an insolvency event. We have the unilateral right to terminate the WuXi Agreement upon 90 days’
prior written notice to WuXi for any reason, subject to applicable cancellation fees. WuXi has the unilateral right to
terminate the WuXi Agreement only if the services cannot be performed due to technical difficulties or the performance of
the services is not permitted under applicable law.

WuXi is currently conducting process transfer, process development and cGMP manufacturing for our XmAb808

(B7-H3 x CD28) and our IL-12 programs.

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Master Clinical Services Agreement with ICON Clinical Research Limited

In April 2016, we entered into a Master Clinical Services Agreement (ICON Agreement) with ICON Clinical
Research Limited (ICON). Under the terms of the ICON Agreement, ICON and its affiliates will perform clinical trial
services (including site selection, study design, site monitoring, management and training, and patient selection) for Xencor
in accordance with applicable regulations. The ICON Agreement may be terminated by either party for a breach by the
other party that is not remedied within 30 days, or if the other party is subject to an insolvency event. Each party may
terminate the ICON Agreement upon 30 days’ prior written notice to the other party for any reason, however such
termination would not affect any ongoing project under the ICON Agreement. We may unilaterally terminate any project
under the ICON Agreement upon 30 days’ prior written notice to ICON for any reason, subject to applicable termination
fees.

ICON is currently providing services to us in connection with each ongoing Xencor-sponsored clinical trial.

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.; and Roche Holding
AG.

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.

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 vudalimab, 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. 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 vudalimab, dually target the immune checkpoint receptors PD-1
and CTLA-4 include Akeso, Inc. and Macrogenics, Inc.

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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.; Merck & Co., Inc.; Nektar Therapeutics, Inc.; Neoleukin Therapeutics, Inc.; Novartis AG; 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 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
Biologics License Application (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.

2.

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

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

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3.

4.

5.

6.

7.

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.

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.

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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.

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

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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.

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.

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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 at
www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file
electronically with the SEC.

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
XmAb 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.

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

● 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 your

investment.

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● 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 product candidates. 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.

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● 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.

● 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 Unique and Specific Business Operations as a Small Biotechnology 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

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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
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 we 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.

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

From time to time, we may publicly disclose preliminary, interim or topline data from our clinical trials. These

updates are based on a preliminary analysis of then-available data, and the results and related findings and conclusions are
subject to change following a more comprehensive review of the data related to the particular study or trial. Additionally,
interim data from clinical trials that we may complete are subject to the risk that one or more of the clinical outcomes may
materially change as patient enrollment continues and more patient data become available. Therefore, positive interim
results in any ongoing clinical trial may not be predictive of such results in the completed study or trial. We also make
assumptions, estimations, calculations and conclusions as part of our analyses of data, and we may not have received or
had the opportunity to fully and carefully evaluate all data. As a result, the preliminary results that we report may differ
from future results of the same studies, or different conclusions or considerations may qualify such results, once additional
data have been received and fully evaluated. Preliminary data also remain subject to audit and verification procedures that
may result in the final data being materially different from the preliminary data we previously published. As a result,
preliminary, interim or topline data should be viewed with caution until the final data are available. In addition, we may
report interim analyses of only certain endpoints rather than all endpoints. Adverse changes between preliminary or interim
data and final data could significantly harm our business and prospects. Further, additional disclosure of interim data by us
or by our competitors in the future could result in volatility in the price of our common stock. See the description of risks
under the heading “Risks Specifically Related to Our Financial Position, Capital Requirements and Ownership of Our
Common Stock” for more disclosure related to the risk of volatility in our stock price.

Further, others, including regulatory agencies, may not accept or agree with our assumptions, estimates,
calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact the
value of the particular program, the approvability or commercialization of the particular product candidate or product and
our company in general. In addition, the information we choose to publicly disclose regarding a particular study or clinical
trial is typically selected from a more extensive amount of available information. You or others may not agree with what
we determine is the material or otherwise appropriate information to include in our disclosure, and any information we
determine not to disclose may ultimately be deemed significant with respect to future decisions, conclusions, views,
activities or otherwise regarding a particular product, product candidate or our business. If the preliminary or topline data
that we report differ from late, final or actual results, or if others, including regulatory authorities, disagree with the
conclusions reached, our ability to obtain approval for, and commercialize our product candidates may be harmed, which
could harm our business, financial condition, results of operations and prospects.

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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, 2020, 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 contract research organizations (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, 2021, 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.

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.

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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 delayed 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 continues or becomes more acute, 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, 2021, we generated net income of $82.6 million and as of
December 31, 2021, we had an accumulated deficit of $283.1 million. We expect to incur 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.

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 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

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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 candidates 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’ completion of clinical trials or delays in 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, 2021, we had $664.1 million in cash, cash equivalents, marketable debt securities, and

receivables. We expect our expenses to increase in connection with our ongoing development activities, including the
continued development of our pipeline of bispecific antibody and cytokine 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 through the end of 2025. 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 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

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of approximately $5.75 to a high of approximately $58.345. 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.

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, 2021 our executive officers, directors, 5% stockholders

and their affiliates beneficially owned, as a group, approximately 70% 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

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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, 2021, we had options to purchase
8,676,329 shares outstanding under our equity compensation plans. In addition, we are also authorized to grant equity
awards, including stock options, to our employees, directors, and consultants, covering up to 13,122,238 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.

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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 Tax Cuts and Jobs Act of 2017
(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, 2021, 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.

New federal and state income tax legislation may affect our current and future income tax liabilities

The TCJA changed the income tax treatment of research and development expenses which may result in additional

federal and state tax liabilities. For tax years ended in December 31, 2022 and subsequent years, research and development
costs must be capitalized and amortized over a period of years which could result in additional federal and state tax
liabilities in 2022 and future years.

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
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:

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● 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.

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.

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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, 2021, we held over 1,300 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;

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.

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;

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9.

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.

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.

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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 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 product
candidate. 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.

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 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, 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 review. 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

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and claim components of our bispecific antibody product candidates and partnered bispecific product candidates, including
plamotamab, tidutamab, vudalimab, 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(e)(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 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 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

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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 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

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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 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, Vir, 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.

collaborators have significant discretion in determining the efforts and resources that they will apply to these
partnerships. For example, in 2021, Novartis notified us of its decision to return the rights to vibecotamab to
us under the terms of the Novartis Agreement, and in 2020, Amgen notified us of its decision to return the
rights to AMG 424 to us under the terms of the Amgen Agreement;

our Janssen Agreement provides for cost-sharing on development costs for the bispecific antibody candidate,
plamotamab. 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;

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4.

5.

6.

7.

8.

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;

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

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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 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 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

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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.

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.

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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 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,

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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.

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 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

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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
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

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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
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

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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.

We may be subject to damages resulting from claims that we or our employees have wrongfully used or disclosed alleged
trade secrets of our employees’ former employers.

Many of our employees were previously employed at universities or other life sciences companies, including our

competitors or potential competitors. Although no claims against us are currently pending, we or our employees may be
subject to claims that these employees or we have inadvertently or otherwise used or disclosed trade secrets or other
proprietary information of their former employers. Litigation may be necessary to defend against these claims. If we fail in
defending such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights. A loss
of key research personnel work product could hamper or prevent our ability to commercialize certain potential products,
which could severely harm our business. Even if we are successful in defending against these claims, litigation could result
in substantial costs and be a distraction to management.

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

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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.

The increasing use of social media platforms presents new risks and challenges.

Social media is increasingly being used to communicate about our products, technologies and programs, and the
diseases our product or product candidates are designed to treat. Social media practices in the biopharmaceutical industry
continue to evolve and regulations relating to such use are not always clear. This evolution creates uncertainty and risk of
noncompliance with regulations applicable to our business. For example, patients may use social media channels to
comment on the effectiveness of a product or to report an alleged adverse event. When such disclosures occur, there is a
risk that we fail to monitor and comply with applicable adverse event reporting obligations or we may not be able to defend
ourselves or the public's legitimate interests in the face of the political and market pressures generated by social media due
to restrictions on what we may say about our product or product candidates. There is also a risk of inappropriate disclosure
of sensitive information or negative or inaccurate posts or comments about us on any social networking website. If any of
these events were to occur or we otherwise fail to comply with applicable regulations, we could incur liability, face overly
restrictive regulatory actions or incur other harm to our business.

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.

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

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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, 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.

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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.

In June 2021, the Company entered into an Agreement of Lease (the Halstead Lease) relating to 129,543 rentable

square feet, for laboratory and office space, in Pasadena, California, where the Company intends to move its corporate
headquarters in the second half of 2022. The term of the Halstead Lease will become effective in two phases. The first
phase commences on August 1, 2022 and encompasses 83,083 square feet while the second phase commences no later than
September 30, 2026 and encompasses an additional 46,460 square feet. The term of the Halstead Lease is 13 years from the
first phase commencement date, August 1, 2022.

In June 2021, the Company entered into an 18-month lease for a 7,020-square-foot office space in Monrovia,

California. The lease began on August 1, 2021 and includes options to renew.

We believe that our existing facilities and planned new corporate headquarters are adequate to meet our current

and future needs.

 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, 2022, the closing price
for our common stock as reported on the Nasdaq Global Market was $32.58.

Holders of Record

As of February 16, 2022, we had 59,375,320 shares of common stock outstanding held by approximately 180

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.

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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 30, 2016 through December 31, 2021 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 30, 2016 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

Under the terms of the Stock Purchase Agreement, Johnson & Johnson Innovation, JJDC, Inc. (JJDC), purchased

$25.0 million of newly issued unregistered shares of the Company’s common stock, priced at a 30-day volume-weighted
average price of $33.4197 per share as of October 1, 2021. The Company issued 748,062 shares of common stock to JJDC
on November 12, 2021. The issued shares are subject to customary resale restrictions pursuant to Rule 144 of the Securities
Act of 1933.

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Purchases of Equity Securities by the Issuer and Affiliated Purchasers

None.

Item 6.  [Reserved]

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

You should read the following discussion and analysis together with 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 XmAb® drug candidates from our proprietary Fc
technology platforms. We also use our protein engineering capabilities to increase our understanding of protein structure
and interactions and to design new Fc technologies and XmAb development candidates with improved properties. In
addition to engineering protein-target interactions, our approach to protein design includes engineering Fc domains, 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 can be readily substituted for
natural Fc domains.

Our protein engineering capabilities and Fc technologies enable us and our partners to develop XmAb 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, we developed an antibody
scaffold to rapidly create novel bispecific antibodies that bind two different targets simultaneously, creating entirely new
biological mechanisms. Other applications of our Fc technologies enhance antibody performance by increasing immune
inhibitory activity, improving cytotoxicity, extending circulating half-life and stabilizing novel protein structures, such as
engineered cytokines. Three medicines have been developed with our Fc technologies. The medicines are marketed by our
partners and, are generating royalty revenues for us, which partially offset our internal development costs.

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, 2021, 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 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 ongoing 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.

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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. For example, sotrovimab, an antibody that targets the SARS-CoV-2 virus, received
an EUA from the FDA for the treatment of mild-to-moderate COVID-19 in high-risk adults and pediatric
patients, and is made available by Vir and its partner GlaxoSmithKline Plc. Sotrovimab incorporates our
Xtend Fc technology for longer duration of action. VIR-7832, a second antibody licensed to Vir, which also
targets the SARS-CoV-2 virus, incorporates Xtend technology and other XmAb Fc technologies, and it is
currently enrolling patients in a Phase 1b/2a study. We are eligible to receive a mid-single digit percentage
royalty on the net sales of both sotrovimab and VIR-7832. Our partner Bristol-Myers Squibb (BMS) has also
licensed our Xtend technology to improve the half-life of antibodies that target SARS-CoV-2 and is
supporting a Phase 2 study for a combination of two half-life-extended antibodies. We are eligible to receive
royalties on net sales of the BMS candidate.

● 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 the amount of
revenue we generate from such partnerships and collaborations for the year ended December 31, 2021.
During the year, we received $204.9 million from our partnerships and collaborations including those with
Vir, MorphoSys, Alexion, Janssen, and Viridian.

Our ability to earn revenue from these and other partnerships is dependent on the ability of our partners to
generate sales from products, such as sotrovimab, Ultomiris®, and Monjuvi®, the ability of our partners to
advance our partnered programs through regulatory approval, and the ability of our partners to advance our
partnered programs into later stages of development, which would entitle us to potential milestone payments.
If the COVID-19 pandemic adversely affects the sales or clinical, development and regulatory progress of
partnered programs, the amount of future revenue we could earn would be adversely affected.

● Clinical studies: We are currently enrolling patients into multiple trials evaluating our drug candidates, and
our partner Genentech is enrolling patients in the Phase 1 study of XmAb306 (also known as RG6323), our
co-development program with Genentech. Many partners are also enrolling patients in clinical trials with
drug candidates that incorporate one or more of our XmAb technologies. Although the pandemic has not
materially affected the development of our clinical programs for the year ended December 31, 2021, 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, development, and administrative activities: We have implemented environmental, health and safety

procedures for all employees and have also offered reimbursement of costs incurred and time off to
employees to receive vaccinations that have been authorized. 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, 2021, these activities have continued without interruption from the
pandemic.

Our development activities include initiating a Phase 1 study of XmAb819, our first 2+1 CD3 bispecific
candidate that targets ENPP3, and conducting IND-enabling studies for XmAb808, our first tumor selective
CD28 bispecific candidate that targets B7-H3, and XmAb662, our reduced-potency engineered IL12 cytokine
candidate. Several other bispecific antibody and cytokine programs are in earlier stages of development.
Certain manufacturing and supply companies have indicated supply chain issues and shortages of research
and manufacturing supply materials. The development timelines for additional early-stage programs and
ongoing clinical programs could be affected if the supply shortages and delays continue for an extended
period.

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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 or Phase 2 studies
for seven wholly owned or co-development candidates to treat patients with many different types of cancer and
autoimmune diseases, and an eighth, to be developed for patients with kidney cancer, is expected to enter clinical
development in early 2022.

Plamotamab (CD20 x CD3): Plamotamab is a bispecific antibody that targets CD20, an antigen on B-cell tumors,

and CD3, an activating receptor on T cells. At the ASH Annual Meeting in December 2021, we presented updated safety
and anti-tumor activity data from the Phase 1 dose-escalation study of plamotamab in B-cell malignancies, including from
patients with relapsed or refractory NHL. The results indicated that plamotamab monotherapy was generally well tolerated
and demonstrated encouraging clinical activity in heavily pretreated patients at the recommended intravenous Phase 2 dose.
We are currently enrolling patients with non-Hodgkin lymphoma in the monotherapy dose expansion cohorts to further
evaluate the safety and efficacy of plamotamab monotherapy at the Phase 2 recommended dose, and we plan to present
data from these cohorts in the second half of 2022. Additionally, pharmacokinetic modeling supports subcutaneous
administration, which we plan to incorporate into our ongoing Phase 1 monotherapy study.

In October 2021, we entered a global collaboration and license agreement with Janssen Biotech, Inc. (Janssen), to

advance plamotamab and XmAb CD28 bispecific antibody combinations for the treatment of patients with B-cell
malignancies, which expands our strategy to develop multiple highly active chemotherapy-free regimens across B-cell
cancers. Janssen received worldwide exclusive development and commercial rights, and we will collaborate with Janssen
on further clinical development of plamotamab, with us paying 20% of costs. Under the collaboration, we will develop B-
cell targeted CD28 bispecific antibodies to selectively enhance T-cell cytotoxic activity in combination with plamotamab.

In 2022, we plan to initiate a potentially registration-enabling Phase 2 study to evaluate the chemotherapy-free

triple combination of plamotamab, tafasitamab and lenalidomide in patients with relapsed or refractory DLBCL
Plamotamab, which redirects T cells to tumors, and tafasitamab, a CD19-directed XmAb antibody, combine powerful and
distinct immune pathways, and the study is designed to generate new clinical insights and accelerate development timelines
for the program. MorphoSys AG and Incyte Corporation will provide tafasitamab for the studies.

Vudalimab (PD-1 x CTLA-4): Vudalimab 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 for patients with
castration-resistant prostate cancer, as well as for patients with other types of solid tumors. In November 2021, we
presented updated data from the Phase 1 study of vudalimab in patients with multiple types of advanced solid tumors at the
SITC Annual Meeting. Data from the Phase 1 study indicate that vudalimab was generally well-tolerated in heavily
pretreated patients with encouraging clinical activity.

We have initiated a Phase 2 study of vudalimab in patients with certain molecular subtypes of CRPC, as a

monotherapy or in combination depending on the molecular subtype, as these patients represent a high unmet medical
need. We plan to present initial data from the Phase 2 study in mCRPC in the second half of 2022.

We are initiating a second Phase 2 study for patients with advanced gynecologic and genitourinary malignancies,

and the study will include a cohort to evaluate vudalimab in patients with clinically-defined high-risk mCRPC.

Tidutamab (SSTR2 x CD3): Tidutamab is a bispecific antibody that targets somatostatin receptor 2, (SSTR2), a

target on many neuroendocrine-like tumor types, and CD3. Dose-escalation and expansion data from the Phase 1 study in
patients with neuroendocrine tumors (NET) indicates that tidutamab was generally well tolerated at the recommended dose
identified for the expansion portion of the study. Tidutamab induced sustained activation of cytotoxic T cells and
engagement of the SSTR2 target and demonstrated an encouraging safety profile. We are enrolling patients in a Phase 2
clinical study for tidutamab in patients with Merkel cell carcinoma and small cell lung cancer, which are SSTR2-

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expressing tumor types known to be responsive to immunotherapy.

XmAb306/RO7310729 (IL15/IL15Rα-Fc Cytokine): XmAb306 is a reduced-potency IL15/IL15Rα-Fc fusion

protein that incorporates our Xtend extended half-life technology, and we are co-developing this program in collaboration
with Genentech. In November 2021, we announced encouraging early preliminary data from an ongoing Phase 1 study in
patients with advanced solid tumors, while further dose escalation in both study arms continues.

We share in 45 percent of worldwide development and commercialization costs for XmAb306 and will receive a

share of net profits or net losses from product sales at the same percentage rate. 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. Additional studies of XmAb306 in combination with other
agents, such as NK- or T-cell recruiting therapies, are being planned.

XmAb564 (IL2-Fc Cytokine): XmAb564 is a wholly owned, monovalent, reduced-potency IL2-Fc fusion protein

that we are developing for the treatment of patients with autoimmune diseases. XmAb564 is engineered to selectively
activate and expand regulatory T cells (Tregs), with reduced binding affinity for IL-2's beta receptor and increased binding
affinity for its alpha receptor. In preclinical studies, XmAb564 was well-tolerated, promoted the selective and sustained
expansion of Tregs and exhibited a favorable pharmacokinetic profile. In April 2021, the first subject was dosed in a
randomized, double-blind, placebo-controlled, single-ascending dose (SAD) Phase 1 clinical study to evaluate the safety
and tolerability of XmAb564, administered subcutaneously in healthy adult volunteers. In 2022, we plan to present
tolerability, durability, and biomarker data from the Phase 1 SAD study, and we plan to initiate a multiple-ascending dose
study in patients with autoimmune diseases.

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 have completed the dose escalation portions of these studies and
are enrolling patients with advanced solid tumors.

XmAb968 (CD38 x CD3): XmAb968 is a bispecific antibody that targets CD38 and CD3. We are supporting a

Phase 1 investigator sponsored trial, which is evaluating XmAb968 in patients with T-cell acute lymphoblastic leukemia, T-
cell lymphoblastic lymphoma and acute myeloid leukemia.

Vibecotamab is a bispecific antibody that targets CD123 and CD3. In August 2021, Novartis notified us it was

terminating its rights with respect to the vibecotamab program, effective February 2022. We do not intend any further
internal development of this program.

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 are currently initiating a Phase 1 study to evaluate XmAb819 in patients with RCC.

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. We are advancing wholly owned CD28 candidates including our lead candidate, XmAb808, a B7-H3 x CD28
bispecific antibody designed to be evaluated for the treatment of patients with a range of solid tumors, which is currently
advancing in IND-enabling studies. We plan to submit an IND application for XmAb808 in the first half of 2022 and
initiate a Phase 1 study in the second half of 2022.

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Our CD28 platform is also the subject of two collaborations with Janssen. The first collaboration was announced
in 2020 and involves our research efforts to create and characterize CD28 bispecific antibody candidates against a prostate
tumor target specified by Janssen. In November 2021, we completed our research efforts under the collaboration. Janssen
selected a CD28 bispecific for further development, and we received a $5.0 million milestone payment. The second
Janssen collaboration was announced in October 2021 and includes conducting research activities with Janssen to create
and characterize CD28 bispecific antibody candidates against B-cell targets during a two-year period, with Janssen having
an exclusive worldwide license to develop selected molecules from the research activities and also selected molecules in
combination with plamotamab and other agents, such as other CD3 bispecific antibodies.

In November 2021, we presented emerging preclinical data from early-stage programs that highlighted several of

our platform technologies at the Annual Meeting of the Society for Immunotherapy of Cancer, with poster presentations
with data from our IL-12-Fc cytokine program, PD-L1 x CD28 bispecific antibody program, TGFβR2 bispecific program,
and bispecific NK cell engager platform.

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 FDA approved Monjuvi® (tafasitamab-cxix) under accelerated approval in July 2020. Monjuvi is a CD19-

directed cytolytic antibody indicated 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). In August 2021, the European Commission granted
conditional marketing authorization for Minjuvi® (tafasitamab) in combination with lenalidomide, followed by tafasitamab
monotherapy, for the treatment of adult patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) who
are not eligible for autologous stem cell transplantation (ASCT). Tafasitamab was created and initially developed by us.
Tafasitamab is co-marketed by Incyte and MorphoSys under the brand name Monjuvi in the U.S. and is marketed by Incyte
under the brand name Minjuvi in the E.U. Incyte has exclusive commercialization rights to tafasitamab outside the U.S.
Monjuvi® and Minjuvi® are registered trademarks of MorphoSys AG. In April 2021, MorphoSys and Incyte announced
the initiation of a Phase 3 study (inMIND) evaluating the addition of tafasitamab to lenalidomide and rituximab in patients
with relapsed or refractory follicular lymphoma or marginal zone lymphoma. In May 2021, MorphoSys and Incyte
announced the initiation of a pivotal Phase 3 study (frontMIND) evaluating tafasitamab and lenalidomide in addition to
rituximab, cyclophosphamide, doxorubicin, vincristine and prednisone (R-CHOP) compared to R-CHOP alone as first-line
treatment for high-intermediate and high-risk patients with untreated DLBCL. In 2021, we earned $12.5 million for the
development milestone related to the inMind trial, and we recognized royalty revenue of $5.9 million on net sales of
Monjuvi.

In March 2021, our two-year research collaboration with Genentech to discover new targeted IL-15 cytokine

candidates concluded, and we may independently advance into development targeted IL-15 programs not previously

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nominated under the agreement. A targeted IL-15 program was identified as a development candidate under the Genentech
Agreement in October 2020, and we were sharing in 45% of development costs for this candidate. In August 2021,
Genentech and Xencor ceased development of the targeted IL-15 program due to observations in preclinical studies that
suggested an undesirable clinical profile. No additional development of this candidate is planned by Genentech or us.
Genentech and we are planning to study additional combination agents with XmAb306.

In October 2017, we entered into an agreement with INmune, pursuant to which we provided INmune with an

exclusive license to our XPro1595 drug candidate. INmune is currently conducting or planning Phase 2 studies in patients
with Alzheimer’s disease, mild cognitive impairment and treatment resistant depression. In connection with the license, we
received shares of INmune common stock and an option to acquire up to 10% of the outstanding common stock of INmune
for $10.0 million. In June 2021, we sold the option to INmune for $15.0 million in cash and $3.3 million in additional
shares of INmune common stock. In September 2021, we exercised an option to acquire an additional 108,000 shares of
INmune common stock for $0.8 million.

In November 2021, we entered into an agreement with Zenas BioPharma (Cayman) Limited (Zenas), to which we

licensed the exclusive worldwide rights to develop and commercialize obexelimab, a bifunctional antibody that targets
CD19 with its variable domain and uses our XmAb Immune Inhibitor Fc Domain. Zenas issued a warrant giving us the
right to acquire additional Zenas equity, such that our total equity in Zenas would be 15% of its fully diluted capitalization
following the closing of Zenas’ next round of equity financing, subject to certain requirements. We are eligible to receive
up to $470.0 million based on the achievement of certain clinical development, regulatory and commercial milestones and
are eligible to receive tiered, mid-single digit to mid-teen percent royalties upon commercialization of obexelimab,
dependent on geography.

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, 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 2021, we received a $5.0 million milestone payment related to our first agreement
with Janssen, which selected an XmAb CD28 bispecific antibody candidate for further development.

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

XmAb 2+1 bispecific antibody, which is being evaluated in a Phase 1 study for patients with prostate cancer; Astellas’
ASP2138, a CLDN18.2 x CD3 bispecific antibody, which is entering Phase 1 development for patients with gastric/GEJ
adenocarcinomas and pancreatic adenocarcinoma 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.

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

authorizations from regulatory agencies in the U.S. and multiple global markets for the treatment of 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 2021, we earned $22.2 million in royalties from Alexion.

In August 2019, we provided Vir a non-exclusive license to our Xtend Fc technology for two targets in infectious

disease. Vir has advanced two programs under this agreement. In the second quarter of 2021, Vir announced plans to
initiate a Phase 2 trial of VIR-3434 in combination with an siRNA drug candidate as a potential treatment for patients with
chronic hepatitis B virus infection, and we earned $0.5 million for the development milestone.

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. In May 2021, the FDA granted EUA to sotrovimab for the treatment of mild-to-moderate
COVID-19 in high-risk adults and pediatric patients. In December 2021, the EU granted a temporary authorization for
sotrovimab, and several other countries have also provided temporary or conditional authorizations for its use. A second
drug candidate, VIR-7832, is in a Phase 1b/2a trial of adults with mild-to-moderate COVID-19. In 2021, we earned
estimated $52.2 million in royalties from Vir.

In May 2021, we entered into a technology license agreement with Bristol-Myers Squibb Company (BMS) under

which BMS has access to Xtend Fc technology to extend the half-life of a novel antibody combination therapy that is
intended to neutralize the SARS-CoV-2 virus for the treatment or prevention of COVID-19. Phase 2 and 3 studies are
planned as part of the NIH ACTIV-2 trial examining treatment of infected outpatients. Under the terms of the agreement,
BMS is solely responsible for the activities and costs related to research, development, regulatory, and commercial
activities for their COVID-19 drug candidates, and we are eligible to receive royalties on net sales.

In December 2021, we entered into an agreement with Viridian Therapeutics, inc. (Viridian) for a non-exclusive

license to certain antibody libraries developed by us. Under the agreement, Viridian received a one-year research license to
review the antibodies and the right to select up to three antibodies for further development. Viridian is responsible for all
further development of the selected antibodies. We received an upfront payment of 394,737 shares of Viridian common
stock valued at $7.5 million and are eligible to receive development, regulatory and sales milestones in addition to royalties
on net sales of approved products under the agreement.

In connection with our June 2016 collaboration and license agreement with Novartis, we granted Novartis a non-

exclusive license to certain non-bispecific Fc technologies to apply against up to ten targets. In 2021, Novartis exercised its
right to incorporate our Xtend Fc domain into a drug candidate. In 2021, we earned $3.0 million in milestones for a
development milestone related to an undisclosed XmAb antibody program that Novartis has advanced into Phase 1 clinical
studies.

Strategic Collaborations

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

and our own protein engineering capabilities, Fc 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 February 2021, we announced an agreement with the University of California, Los Angeles (UCLA) to develop
therapeutic antibodies, pairing novel targets proposed by scientists at UCLA and utilizing our XmAb Fc domains. UCLA’s
Technology Development Group will work with faculty to propose potential antibody drug candidates, and for selected
candidates, we will use a streamlined framework with predefined terms to enter sponsored research agreements and
potential license agreements.

Refer to Part IV, Item 15, Note 10, "Collaboration and Licensing Agreements" of the notes to our 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, 2021, we have generated $820.7 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, 2021 and 2020 (in millions):

Aimmune
Alexion
Amgen
Astellas
Genentech
Gilead
Janssen
MorphoSys
Novartis
Omeros
Vir
Viridian
Zenas
Total

Year Ended
December 31, 

2021

2020

$

 —     

$

 22.2
 —
 —
 2.5
 —
 113.8
 18.4
 43.1
 —
 52.7
 7.5
 14.9
 275.1

$

$

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

Research and Development Expenses

The following is a comparison of research and development expenses for the years ended December 31, 2021 and

2020 (in millions):

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

Year Ended
December 31, 

2021

2020

$

$

 101.7     
 66.6
 24.2
 192.5

$

$

 94.2
 54.7
 20.9
 169.8

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 CROs and

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contract manufacturing organizations (CMOs) 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 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, 2021 and

2020 (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:

Vudalimab (XmAb717)
XmAb104
XmAb841

Total TME activator programs

Cytokine programs:

XmAb306/RG6323 and a targeted IL-15 candidate*
XmAb564

Total cytokine programs

Subtotal bispecific programs

Other, research and early-stage programs

Year Ended
December 31, 

2021

2020

$

 1.4

$

 2.9

 8.3
 33.7
 15.6
 16.7
 74.3

 26.2
 15.7
 12.5
 54.4

 15.3
 13.2
 28.5

 157.2

 33.9

 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

Total research and development expenses

$

 192.5

$

 169.8

*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 year ended December 31, 2021, other income, net, consists primarily of realized and unrealized gain on

equity securities during the year, while for the year ended December 31, 2020, other income, net, consists primarily of
interest income from our investments during the year.

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 accompanying
notes. Actual results could differ materially from those estimates. Our management believes judgment is

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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, 2021 and 2020 were
$16.5 million and $16.0 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 certain patent
claims or abandon other claims are made by us based on our judgment and existing knowledge of our

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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 $0.9 million and $0.5 million for the years ended December 31, 2021 and 2020, 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 CROs 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 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, 2021.

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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 2020 and 2019 related to federal AMT credit carryovers.

We recorded net deferred tax assets of $93.6 million as of December 31, 2021, 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, 2021, we had cumulative net operating loss carryforwards for
federal income tax purposes of approximately $168.2 million; $63.9 million of such losses were incurred prior to
December 31, 2017 and $104.3 million were incurred in the years ending on or after December 31, 2018. We also had
available tax credit carryforwards of $34.0 million for federal tax purposes. We had cumulative state tax loss carryforwards
at December 31, 2021 of $161.6 million, and available state tax credit carryforwards of approximately $17.8 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 $0.5 million of federal tax credits will expire if unused from 2021 through 2024.

No income tax expense or benefit was recorded for the year ended December 31, 2021 or 2020.

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.

● 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.

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● 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

The discussion that follows includes a comparison of our results of operations and liquidity and capital resources
for the years ended December 31, 2021 and 2020. For a comparison of our results of operations and financial condition for
the years ended December 31, 2020 and 2019. see “Item 7 – Management’s Discussion and Analysis of Financial
Condition and Results of Operations” in our 2020 Annual report on Form 10-K, filed with the SEC on February 23, 2021.

Comparison of the Years Ended December 31, 2021 and 2020

The following table summarizes our results of operations for the years ended December 31, 2021 and 2020 (in

millions):

Revenues:

Research collaboration
Milestone
Licensing
Royalties
Total revenues
Operating expenses:

Research and development
General and administrative

Total operating expenses
Other income, net
Net income (loss)

Revenues

Year ended
December 31, 
2020

2021

Change

$

$

 93.0
 21.0
 80.8
 80.3
 275.1

 192.5
 38.8
 231.3
 38.8
 82.6

$

$

 4.5
 50.2
 50.2
 17.8
 122.7

 169.8
 29.7
 199.5
 7.5
 (69.3)

$

$

 88.5
 (29.2)
 30.6
 62.5
 152.4

 22.7
 9.1
 31.8
 31.3
 151.9

Increased research collaboration revenues in 2021 is primarily revenue recognized under our Janssen and Novartis

agreements, while research collaboration revenues in 2020 is primarily revenue recognized under our Genentech
agreement.

Milestone payments decreased by $29.2 million in 2021 over 2020 amounts primarily due to milestones received

from Janssen and MorphoSys in 2021, compared to milestones received from Alexion and MorphoSys in 2020.

Licensing revenues in 2021 primarily consist of revenues recognized from Janssen, Viridian, and Zenas, and

licensing revenues in 2020 primarily consist of revenues recognized from various technology and product license
agreements entered throughout the year.

Increased royalty revenues for 2021 is primarily due to revenue recognized from our Alexion, MorphoSys, and

Vir agreements over royalty amounts in 2020, which is primarily 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, 2021

and 2020 (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:

Vudalimab (XmAb717)
XmAb104
XmAb841

Total TME activator programs

Cytokine programs:

XmAb306/RG6323 and a targeted IL-15 candidate*
XmAb564

Total cytokine programs

Subtotal bispecific programs

Other, research and early-stage programs

Year Ended
December 31, 
2020

2021

Change

$

 1.4

$

 2.9

$

 (1.5)

 8.3
 33.7
 15.6
 16.7
 74.3

 26.2
 15.7
 12.5
 54.4

 15.3
 13.2
 28.5

 157.2

 33.9

 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

 (4.1)
 (0.1)
 0.7
 9.3
 5.8

 (0.2)
 2.4
 1.9
 4.1

 3.3
 (2.2)
 1.1

 11.0

 13.2

Total research and development expenses

$

 192.5

$

 169.8

$

 22.7

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

Research and development expenses increased by $22.7 million in 2021 over 2020 amounts as we continue to

expand our pipeline of bispecific antibody and cytokine candidates. Increased research and development spending in 2021
was primarily driven by increased spending on our XmAb819 program and other early-stage programs including IND
enabling studies for our B7-H3 x CD28 program and early development work on XmAb662, our IL-12 cytokine program,
during the year.

General and Administrative Expenses

General and administrative expenses increased by $9.1 million in 2021 over 2020 amounts primarily due to
increased general and administrative staffing, and additional spending on facilities and intellectual property costs including
licensing fees.

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Other Income, Net

Other income, net increased by $31.3 million in 2021 over 2020 amounts reflecting the gain realized from the sale

of the INmune option, and the unrealized gain recognized from the change in accounting for our investments in equity
securities in connection with our licensing transactions.

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 2021, we received a total of $204.9 million in upfront payments, milestones, and royalties in connection with

licensing of our technologies and products.

At December 31, 2021, we had $664.1 million of cash, cash equivalents, marketable debt securities, and
receivables compared to $610.2 million at December 31, 2020. 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. At the current stage of our clinical development
programs, 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 through the end of 2025. 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.

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 (decrease) in cash and cash equivalents

Year Ended December 31, 

2021

2020

$

$

 (16,853)
 (46,249)
 43,038
 (20,064)

$

$

 (5,004)
 100,192
 18,044
 113,232

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Operating Activities

Net cash used by operating activities for the years ended December 31, 2021 and December 31, 2020 reflect the

operating expenses incurred in each year offset by the upfront, milestone, and royalty payments received during the
respective year.

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 2021,
we purchased $24.4 million of marketable securities, net of $485.2 million of proceeds from sales and maturities. In 2020,
we redeemed $114.0 million of marketable securities, net of $643.7 million of purchase. We acquired $2.7 million and $3.2
million of intangible assets in the years ended December 31, 2021 and 2020, respectively. We purchased $11.8 million and
$10.5 million of capital equipment for the years ended December 31, 2021 and 2020, respectively. We also purchased a
$5.0 million convertible note for the year ended December 31, 2021.

Financing Activities

Net cash provided by financing activities during the year ended December 31, 2021 consists primarily of proceeds

from issuance of common stock in connection with our Janssen collaboration, stock option exercises, and proceeds from
the sales of shares under our Employee Stock Purchase Plan (ESPP). Net cash provided by financing activities during the
year ended December 31, 2020 consists primarily of cash from stock option exercises and the sales of shares under the
ESPP.

Contractual Obligations and Commitments

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
$0.8 million 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 $0.2 million in connection with this license and made a Phase
1 milestone payment of $0.1 million in 2018. We made a Phase 2 milestone payment of $0.2 million in 2021.

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 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%.

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

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antibody and cytokine drug candidates: tidutamab, vudalimab, 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 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 2021, we recorded a milestone payment due of CHF 170,000 upon an initiation of
Phase 2.

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 made
payments in connection with the use of our Xtend™ technology, including use by us in our development candidates and
also for use by our licensees. Our obligations to make payments under this agreement expired in December 2021. We made
milestone payments under this agreement of $375,000 and $1,275,000 for 2020 and 2021, 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.

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.

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Item 8.  Financial Statements and Supplementary Data

Xencor, Inc.
Financial Statements

Audited Financial Statements for the Years Ended December 31, 2021, 2020 and 2019:

Report of Independent Registered Public Accounting Firm (PCAOB ID: 49)   
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, 2021 and 2020, the
related statements of comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the
period ended December 31, 2021, 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, 2021 and 2020, and the
results of its operations and its cash flows for each of the three years in the period ended December 31, 2021, in conformity
with 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, 2021, 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 24, 2022, 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, 2021. 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 stand-alone 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.

/s/ RSM US LLP

We have served as the Company’s auditor since 2015.

Los Angeles, California
February 24, 2022

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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, 2021, 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, 2021, 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, 2021 and 2020, the related statements of
comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the period ended
December 31, 2021, of the Company and our report, dated February 24, 2022, 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 24, 2022

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Xencor, Inc.

Balance Sheets

(in thousands, except share and per share data)

Assets
Current assets

Cash and cash equivalents
Marketable debt securities
Marketable equity securities
Accounts receivable
Contract asset
Prepaid expenses and other current assets

Total current assets
Property and equipment, net
Patents, licenses, and other intangible assets, net
Marketable debt securities - long term
Marketable equity securities - long term
Notes receivable - long term
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
Total liabilities
Commitments and contingencies (see note 9)
Stockholders’ equity

December 31, 

2021

2020

$

$

$

143,480
153,767
36,860
66,384
—
23,877
424,368
28,240
16,493
300,465
31,262
5,000
31,730
653
838,211

14,001
19,443
—
37,294
70,738
33,969
104,707

$ 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

Preferred stock, $0.01 par value: 10,000,000 authorized shares; -0- issued and
outstanding shares at December 31, 2021 and 2020
Common stock, $0.01 par value: 200,000,000 authorized shares; 59,355,558 issued
and outstanding shares at December 31, 2021 and 57,873,444 issued and outstanding
at December 31, 2020
Additional paid-in capital
Accumulated other comprehensive income
Accumulated deficit
Total stockholders’ equity
Total liabilities and stockholders’ equity

—

—

595
1,017,523
(1,510)
(283,104)
733,504
838,211

$

580
  937,525
74
  (365,735)
  572,444
$ 703,244

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), net
Gain on equity securities, net

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, 
2020

2019

2021

$

275,111

$

122,694

$

156,700

192,507
38,837
231,344
43,767

849
(1,274)
39,289
38,864

82,631
—
82,631

(1,584)
81,047

1.42
1.37

$

$
$

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

7,264
95
105
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

$

$
$

58,379,641
60,495,455

  57,212,737
  57,212,737

  56,531,439
  58,467,880

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, 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
Sale of common stock
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, 2021

Common Stock

Shares
56,279,542

Amount
$ 563 $

Comprehensive Accumulated Stockholders’
Income (Loss)

Deficit
(323,277) $

Equity
521,681

845,366 $

(971) $

Additional
Paid
in-Capital

Accumulated
Other

Total

543,887

67,561
11,311
—
—
56,902,301

5

1
—
—
—
569

9,264

1,392
—
—
31,851
887,873

858,470

9

16,608

50,318
62,355
—
—
57,873,444
748,062

520,240

62,257
151,555
—
—
59,355,558

1
1
—
—
580
7

5

1
2
—
—

1,426
(1)
—
31,619
937,525
28,913

12,276

1,836
(2)
—
36,975

$ 595 $ 1,017,523 $

—

—

2,132
—
1,161

—

—
—
(1,087)
—
74
—

—

—

26,875
—
(296,402)

9,269

1,393
—
29,007
31,851
593,201

—

16,617

—
—
(69,333)
—
(365,735)
—

1,427
—
(70,420)
31,619
572,444
28,920

—

—

12,281

—
—
(1,584)
—
(1,510) $

—
—
82,631
—

(283,104) $

1,837
—
81,047
36,975
733,504

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 (accretion of discount) on marketable securities
Stock-based compensation
Abandonment of capitalized intangible assets
Loss on disposal of assets
Gain on sale of marketable securities available-for-sale
Equity received in connection with license agreement
Equity received in connection with sale of financial assets
Cash redemption of equity received in connection with license agreement
Change in fair value of equity securities
Equity securities impairment

Changes in operating assets and liabilities:

Accounts receivable
Interest receivable from marketable debt securities
Prepaid expenses and other current assets
Income tax receivable
Contract asset and deposits
Accounts payable
Accrued expenses
Deferred rent
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
Purchase of convertible note
Exercise of stock options

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

Net cash provided by financing activities
Net (decrease) 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

2021

Year ended December 31, 
2020

2019

$

82,631

$

(69,333)

$

26,875

7,491
3,160
36,975
934
462
—
(22,379)
(3,300)
—
(20,988)
762

(54,941)
655
(13,151)
—
12,059
5,047
1,840
—
1,211
(55,321)
(16,853)

485,152
19
(509,597)
(2,682)
(13,299)
(5,000)
(842)
(46,249)

12,281
1,837
28,920
43,038
(20,064)
163,544
143,480

14
—

(1,584)

$

$
$

$

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

$

$
$

$

$

$
$

$

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 bispecific 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, 2021, 2020, and 2019 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 GAAP requires management to make certain estimates

and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, other comprehensive gain
(loss) and the related disclosures. On an ongoing basis, management evaluates its estimates, including estimates related to
its accrued clinical trial and manufacturing development expenses, stock-based compensation expense, evaluation of
intangible assets, investments, leases and other assets for evidence of impairment, fair value measurements, and
contingencies. Significant estimates in these financial statements include estimates made for royalty revenue, accrued
research and development expenses, stock-based compensation expenses, intangible assets, incremental borrowing rate for
right-of-use asset and lease liability, estimated standalone selling price of performance obligations, estimated time for
completing delivery of performance obligations under certain arrangements, the likelihood of recognizing variable
consideration, the carrying value of equity instruments without a readily determinable fair value, and recoverability of
deferred tax assets.

Recent Accounting Pronouncements

Pronouncements adopted in 2021

Effective January 1, 2021, the Company adopted ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the

Accounting for Income Taxes, which removes specific exceptions to the general principles in Topic 740 and simplifies the
accounting for income taxes. The adoption of this standard did not have a significant impact on the Company’s financial
statements.

Effective January 1, 2021, the Company adopted 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 adoption of this standard did not have a significant impact on the Company’s financial statements.

Effective January 1, 2021, the Company adopted ASU No. 2020-10, Codification Improvements, which amends a

variety of topics in the Accounting Standards Codification to improve consistency and clarify guidance. The adoption of
this standard did not have a significant impact on the Company’s financial statements.

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Pronouncements not yet effective

There are accounting standards that have been issued by the Financial Accounting Standards Board (FASB) but

are not yet effective. The standards are not expected to have a material impact on our results of operations, financial
conditions, or cash flows.

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 Accounting Standards Codification (ASC)

606, Revenue from Contracts with Customers, 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 $37.3 million and $92.6 million at December 31, 2021 and 2020,
respectively.

Accounts Receivable

Accounts receivable primarily consists of royalty and milestone revenues receivable from our license and

collaboration agreements, as well as receivables arising from cost-sharing development activities. We did not record
allowance for doubtful accounts at December 31, 2021 or 2020, as we expect to collect all receivables within the terms,
which are generally between 30 and 60 days.

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 well as fees
paid to other entities that conduct certain research and 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 they incurred. 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.

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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 Debt 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, 2021 and 2020, respectively. Accrued interest on
marketable debt securities is included in marketable securities’ carrying value. Accrued interest was $0.8 million and $1.4
million at December 31, 2021 and 2020, 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 investments in equity securities without a readily determinable fair value, where the
Company elects the measurement alternative to record at their 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.

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, 2021 and 2020 approximated $143.2 million and $163.3 million, respectively.

We have payables with four service providers that represent 64% of our total payables and with one service

provider that represented 49% of our total payables at December 31, 2021 and 2020, respectively. We rely on four critical
suppliers for the manufacture of our drug product for use in our clinical trials. While we believe that there are

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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, 2021 or 2020.

We have receivables with two service providers that represent 84% and 88% of our total receivables at December

31, 2021 and 2020, respectively. The receivables are related to royalty revenues from our licensing and collaboration
agreements. No other customer accounted for more than 10% of total receivables at December 31, 2021 or 2020.

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 a financial instrument is the amount that would be received in an asset sale or paid to transfer a
liability in an orderly transaction between unaffiliated market participants. 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 ASC

820, Fair Value Measurements and Disclosures. 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

Money Market Funds in Cash and Cash
Equivalents
Corporate Securities
Government Securities

Total
Fair Value

123,892
144,418
309,814
578,124

Total
Fair Value

158,937
119,833
315,353
594,123

$

$

$

$

$

$

$

$

December 31, 2021

Level 1

Level 2

Level 3

123,892
—
—
123,892

$

$

— $

144,418
309,814
454,232

$

December 31, 2020

Level 1

Level 2

Level 3

158,937
—
—
158,937

$

$

— $

119,833
315,353
435,186

$

—
—
—
—

—
—
—
—

Our policy is to record transfers of assets between Level 1 and Level 2 at their fair values as of the end of each

reporting period, consistent with the date of the determination of fair value. During the years ended December 31, 2021 and
2020, there were no transfers between Level 1 and Level 2.

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

Patents, Licenses, and Other Intangible Assets

3 - 5 years
5 - 7 years
5 - 7 years or remaining
lease term, whichever is less

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 1 to 18 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 3 to 27 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

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abandoned patent filings are charged off in the period of the decision to abandon. During 2021, 2020, and 2019, we
abandoned previously capitalized patent and licensing related charges of $0.9 million, $0.5 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, 

2021

13,231     
8,821
2,474
399
24,925
(6,800)
(1,632)
16,493

$

$

2020
12,038
8,432
2,560
399
23,429
(5,791)
(1,661)
15,977

$

$

Amortization expense for patents, licenses, and other intangible assets was $1.2 million, $1.1 million, and $0.9

million for the years ended December 31, 2021, 2020, and 2019, respectively.

Future amortization expense for patent, licenses, and other intangible assets recorded as of December 31, 2021,

and for which amortization has commenced, is as follows:

2022
2023
2024
2025
2026
Thereafter
Total

Year ended
December 31, 
(in thousands)

1,073
957
770
680
586
3,207
7,273

$

$

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, 2021, the Company has $8.8 million of intangible assets which
are in-process and have not been placed in service, and accordingly amortization on these assets has not commenced.

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, 2021, 2020, or 2019.

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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, 2021 or 2020.

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 $37.0 million,
$31.6 million, and $31.9 million for the years ended December 31, 2021, 2020, and 2019, respectively.

Net Income (Loss) Per Share

Basic net income (loss) per common share is computed by dividing the net income (loss) attributable to common

stockholders by the weighted-average number of common shares outstanding during the period without consideration of
common stock equivalents. Diluted net income (loss) per common share is computed by dividing the net income (loss)
attributable to common stockholders by the weighted-average number of common stock equivalents outstanding for the
period. Potentially dilutive securities consisting of stock issuable pursuant to outstanding options and restricted stock units
(RSUs), and stock issuable pursuant to the 2013 Employee Stock Purchase Plan (ESPP) are not included in the per
common share calculation in periods when the inclusion of such shares would have an anti-dilutive effect.

Basic and diluted net income (loss) per common share is computed as follows:

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 in the
diluted net income per common share calculation for 2021 and 2019.

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In 2020, we excluded all options and awards from the calculations because we reported net losses in the period,

and the inclusion of such shares would have had an antidilutive effect.

Year Ended December 31, 
2020
(in thousands, except share and per share data)  

2019

2021

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

$

$

82,631

$

(69,333) $

26,875

58,379,641
1.42

  57,212,737
$

(1.21) $

  56,531,439
0.48

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, RSUs, 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

$

82,631

$

(69,333) $

26,875

58,379,641
2,115,814

  57,212,737

  56,531,439
—   1,936,441

60,495,455
1.37

$

  57,212,737
$

(1.21) $

  58,467,880
0.46

For the year ended December 31, 2021, we excluded 1,196,268 shares of options and RSUs from the calculation
of diluted net income per common share because the inclusion of such shares would have had an anti-dilutive effect. For
the year ended December 31, 2020, all outstanding potentially dilutive securities were excluded from the calculation as the
effect of including such securities would have been anti-dilutive. For the year ended December 31, 2019, we excluded
1,022,623 shares of options and RSUs from the calculation because the inclusion of such shares would have had an anti-
dilutive effect.

Segment Reporting

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, 2021, 2020, and 2019, the only component of other comprehensive income (loss) is net
unrealized gain (loss) on marketable debt securities. There were no material reclassifications out of accumulated other
comprehensive loss during the year ended December 31, 2021.

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3. Marketable Debt and Equity Securities

The Company’s marketable debt securities held as of December 31, 2021 and 2020 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, 2021

Gross

Gross

     Amortized

     Unrealized

Unrealized     

Cost

Gains

Losses

Fair Value

$

$

123,892
144,584
311,148
579,624

$

$

— $
—
1
1

$

— $

(166)
(1,335)
(1,501) $

123,892
144,418
309,814
578,124

$

$

123,892
454,232
578,124

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

The maturities of the Company’s marketable debt securities as of December 31, 2021 are as follows:

(in thousands)
Mature in one year or less
Mature within two years

Amortized
Cost

Estimated
Fair Value

$

$

153,871
301,861
455,732

$

$

153,767
300,465
454,232

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The unrealized losses on available-for-sale investments and their related fair values as of December 31, 2021 and

2020 are as follows:

(in thousands)
Corporate Securities
Government Securities

(in thousands)
Corporate Securities
Government Securities

December 31, 2021

Less than 12 months

12 months or greater

Fair value

Unrealized
losses

Fair value

Unrealized
losses

50,337
39,909
90,246

$

$

(51)
(54)
(105)

$

$

45,872
254,593
300,465

$

$

(115)
(1,281)
(1,396)

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)

$

$

— $
—
— $

—
—
—

$

$

$

$

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.

The Company’s equity securities include securities with a readily determinable fair value. These investments are
carried at fair value with changes in fair value recognized each period and reported within other income (expense). Equity
securities with a readily determinable fair value and their fair values (in thousands) as of December 31, 2021 and 2020 are
as follows:

Astria Common Stock
INmune Common Stock
Viridian Common Stock

Fair Value
December 31, 2021
3,449
19,233
14,178
36,860

$

$

$

$

Fair Value
December 31, 2020

—
—
5,303
5,303

The Company also has investments in equity securities without a readily determinable fair value. The Company
elects the measurement alternative to record these investments at their initial cost and evaluate such investments at each
reporting period for evidence of impairment, or observable price changes in orderly transactions for the identical or a
similar investment of the same issuer. During the year ended December 31, 2021, the Company recorded an impairment
charge of $0.8 million related to the Astria preferred stock. Equity securities without a readily determinable fair value and
their carrying values (in thousands) as of December 31, 2021 and 2020 are as follows:

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Astria Preferred Stock
Zenas Preferred Stock

Carrying Value
December 31, 2021
312
30,950
31,262

$

$

$

$

Carrying Value
December 31, 2020

—
16,071
16,071

In 2018, the Company received equity shares in Quellis Biosciences, Inc. (Quellis) in connection with a licensing

transaction. The Company recorded the Quellis equity as securities without a readily determinable fair value, and the
investment was recorded at its original cost. In 2021, Quellis merged into Catabasis Pharmaceuticals, Inc. (Catabasis), and
the Company received 259,206 shares of common stock and 3,928 shares of preferred stock in Catabasis in exchange for
its Quellis equity. In June 2021, 3,581 shares of the Catabasis preferred stock were exchanged for 3,580,539 shares of
Catabasis common stock. The total 3,839,745 shares of the Catabasis common stock have a readily determinable fair value.
In August 2021, Catabasis effected a reverse stock split of its shares of common stock at a ratio of 1:6, and in September
2021, Catabasis changed its name to Astria Therapeutics, Inc. (Astria). The adjustment in the fair value of the Astria
common stock has been recorded in unrealized gain (loss) on equity securities for the year ended December 31, 2021.

The Company records its investment in the shares of Astria preferred stock as an equity interest without a readily
determinable fair value. The Company elected to record the original 3,928 shares of preferred stock at their initial cost of
$12.1 million and to review the carrying value for impairment or other changes in carrying value at each reporting period.
After the conversion of 3,581 shares of Astria preferred stock to common stock in June 2021, the Company
owned 347 shares of preferred stock and continued to carry the shares at their original cost of $1.1 million. The Company
subsequently recorded impairment charges of $0.8 million related to its investment in Astria’s preferred stock.

In 2017, the Company received 1,585,000 shares of common stock of INmune Bio, Inc. (INmune) and an option
to acquire an additional 10% of INmune’s outstanding shares of common stock in connection with a licensing transaction.
The Company also received an option to acquire 108,000 shares of INmune common stock in connection with a designee
appointed by us serving on the board of directors of INmune. The Company initially recorded its equity interest, including
its option to acquire additional equity in INmune, at cost pursuant to ASC 323, Investments – Equity Method and Joint
Ventures. In June 2021, the Company entered into an Option Cancellation Agreement with INmune and received $15.0
million in proceeds and an additional 192,533 shares of INmune common stock in exchange for the option to acquire 10%
of INmune. During the three-month period ended June 30, 2021, the Company determined that it should no longer account
for its investment in INmune under the equity method. In September 2021, the Company exercised its option to
purchase 108,000 shares of INmune common stock for $0.8 million and the Company recorded a gain of $0.9 million on
the purchase. The 1,885,533 shares of INmune common stock have a readily determinable fair value, and the adjustment in
the fair value of the shares of INmune common stock was recorded in gain (loss) on equity securities for the year ended
December 31, 2021.

In December 2020, the Company received 322,407 shares of common stock of Viridian Therapeutics, Inc.

(Viridian) in connection with the Viridian Agreement (defined below). In December 2021, the Company received an
additional 394,737 shares of common stock of Viridian in connection with the Second Viridian Agreement (defined below).
The shares of Viridian common stock are classified as equity securities with a readily determinable fair value and the
adjustment in the fair value of the shares of Viridian common stock was recorded in gain (loss) on equity securities for the
year ended at December 31, 2021.

In 2020, the Company received an equity interest in Zenas BioPharma Limited (Zenas), in connection with the
Zenas Agreement (defined below). The Company elected the measurement alternative to carry the Zenas equity 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. In 2021, the Company received a warrant to receive equity from Zenas in
connection with the Second Zenas Agreement (defined below). During the year ended December 31, 2021, there have not
been any impairment or observable price changes related to this investment.

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Unrealized gains and losses recognized on equity securities (in thousands) during the year ended December 31,

2021 and 2020 consist of the following:

Net gains recognized on equity securities
Less: net gains recognized on equity securities redeemed
Unrealized gain (losses) recognized on equity securities

4. Sale of Additional Common Stock

Year Ended December 31, 

2021

2020

$

$

39,289
18,301
20,988

$

$

105
801
(696)

Under the terms of the Stock Purchase Agreement (defined below), Johnson & Johnson Innovation, JJDC, Inc.

(JJDC), purchased $25.0 million of newly issued unregistered shares of the Company’s common stock, priced at a 30-day
volume-weighted average price of $33.4197 per share as of October 1, 2021. The Company issued 748,062 shares of
common stock to JJDC on November 12, 2021. The issued shares are subject to customary resale restrictions pursuant to
Rule 144 of the Securities Act of 1933.

5. Property and Equipment

Property and equipment consist of the following:

Computers, software and equipment
Furniture and fixtures
Leasehold and tenant improvements
Total gross carrying amount
Less accumulated depreciation and amortization
Total property and equipment, net

December 31, 

2021

2020

(in thousands)

$

41,955      $

539
8,574
51,068
(22,828)
28,240

$

$

31,229
527
6,957
38,713
(17,031)
21,682

Depreciation expense related to property and equipment in 2021, 2020, and 2019 was $6.3 million, $4.7 million,

and $3.4 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, 2021 and December 31, 2020.
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.

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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
Change in state rate
Net change in valuation allowance
Income tax provision

2021

17,352      $
783
(10,492)
2,424
—
95
2,599
(12,761)

— $

$

$

Year Ended
December 31, 
2020

2019

(14,559)     $
(4,659)
(9,669)
529
—
56
—
28,302

— $

5,709
2,549
(6,747)
1,927
1,725
(301)
—
(4,550)
312

The tax effect of temporary differences that give rise to a significant portion of the deferred tax assets and

liabilities at December 31, 2021 and 2020 is presented below (in thousands):

Deferred income tax assets

Net operating loss carryforwards
Research credits
Unrealized loss on securities
Capitalized lease assets
Accrued compensation
Deferred revenue
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
Depreciation
Unrealized gain on securities
Gross deferred income tax liabilities

Net deferred income tax asset

December 31, 

2021

2020

$

$

46,629
48,128
327
489
9,207
—
104,780
(93,580)
11,200

(3,416)
(3,508)
(151)
(13)
(288)
(3,824)
(11,200)

$

— $

56,182
38,047
195
288
8,464
11,925
115,101
(105,995)
9,106

(4,219)
(4,497)
(194)
(21)
(151)
(24)
(9,106)
—

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, 2021 and 2020. 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, 2021, the valuation allowance decreased by $12.4 million. The Company’s tax years starting in 2017
through 2020 remain open to potential examination by the U.S. and state taxing authorities due to carryforwards of net
operating losses.

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As of December 31, 2021, we had cumulative net operating loss carryforwards for federal and state income tax

purposes of $168.2 million and $161.6 million, respectively, and available tax credit carryforwards of approximately $34.0
million for federal income tax purposes and $17.8 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 $63.9 million of losses incurred
prior to January 1, 2018, which are subject to carryforward limitations and $104.3 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 $0.5 million in federal tax credits
will expire over the next four 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.

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, 2021, the total number of shares of common stock available for issuance under the 2013 Plan
was 13,122,238. 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, 2021, the total number of shares of common stock
available for issuance under the 2013 Plan was increased by 2,314,937 shares, which is included in the number of shares
available for issuance above. As of December 31, 2021, a total of 12,400,073 options have been granted under the 2013
Plan.

As of December 31, 2021, the Company has awarded 1,124,487 RSUs to certain employees pursuant to the 2013

Plan. Vesting of these awards will be annually over equal installments, either a two or three-year vesting period, 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

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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 2021. As of December 31, 2021, we have issued a total of 529,852 
shares of common stock under the ESPP. 

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, 
2020

2021
12,813     $ 10,769     $
24,162
36,975

20,850
$ 31,619

$

Year Ended
December 31, 
2020

2021
27,909     $ 26,045     $

     $

$

     $

992
8,074
36,975

804
4,770
$ 31,619

$

$

2019

8,854
22,997
31,851

2019
30,502
687
662
31,851

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

97

2021

December 31, 
2020

5,576,430   4,668,179  

$

24.15 $

21.75 $

2019
3,950,965
17.79

21.65 $

$
  3,597,371   3,346,092
7.00

6.65  

16.96 $

20.74
  3,975,160
7.32

 
 
 
 
 
 
 
 
    
 
 
 
 
 
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The following table summarizes stock option activity for the years ended December 31, 2021 and 2020:

Balances at December 31, 2019

Options granted
Options forfeited
Options exercised(3)

Balances at December 31, 2020

Options granted
Options forfeited
Options exercised(3)

Balances at December 31, 2021
As of December 31, 2021

Options vested and expected to vest
Exercisable

Weighted-
Average
Exercise
Price
(Per Share)(1)
24.03  
33.08
32.93
19.36
26.23  
41.22
36.15
23.61
29.11

$

Number of
Shares
7,174,319
1,679,324
(243,384)
(858,470)
7,751,789
1,827,234
(382,454)
(520,240)
8,676,329

8,676,329
5,576,430

$
$

29.11  
24.15  

     Weighted-     
Average
Remaining
Contractual
Term
(in years)
7.32

Aggregate
Intrinsic Value  
(in thousands)(2) 
$

79,116

7.00

$

134,941

6.65

6.65
5.53

$

$
$

100,057

100,057
89,287

(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, 2021 and 2020.

(3) The total intrinsic value of stock options exercised was $9.2 million, $16.3 million, and $11.5 million for the years ended

December 31, 2021, 2020 and 2019 respectively.

The stock options outstanding and exercisable by exercise price at December 31, 2021 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

1.68
3.33
5.52
7.91
8.31
6.65

$
$
$
$
$
$

4.29  
13.15  
22.77  
32.08
40.12
29.11  

Number of
Shares

151,488  
1,508,709  
1,777,216  
2,312,270
2,926,646
8,676,329  

Number of
Shares

151,488
1,507,724
1,756,016
1,168,530
992,672
5,576,430

$
$
$
$
$
$

Weighted-
Average
Exercise Price
Per Share

4.29
13.15
22.76
31.65
37.52
24.15

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.

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The fair value of employee stock options was estimated using the following weighted average assumptions for the

years ended December 31, 2021, 2020 and 2019:

Common stock fair value per share
Expected volatility
Risk-free interest rate
Expected dividend yield
Expected term (in years)

$

2021
30.65 - 49.47

Options
2020
20.69 - 45.91
 53.91% - 56.82%   52.93% - 58.95%   60.67% - 61.33%
  0.29% - 1.71%
  0.47% - 1.33%
—
—
5.23 - 7.65
6.00 - 7.65

2019
29.96 - 44.19

—
5.23 - 6.59

  1.37% - 2.60%

$

$

Expected term (years)
Expected volatility
Risk-free interest rate
Expected dividend yield

2021
0.5 - 2.0
46.08% - 66.37%
0.04% - 1.65%
—

ESPP
2020
0.5 - 2.0
50.77% - 66.37%
0.09% - 1.65%
—

2019
0.5 - 2.0
50.77% - 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, 2021, 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.

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.

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, 2021.

The following table summarizes RSU activity for the years ended December 31, 2021:

Unvested at December 31, 2019

Granted
Vested
Forfeited

Unvested at December 31, 2020

Granted
Vested
Forfeited

Unvested at December 31, 2021

99

Weighted-
Average
Grant Date
Fair Value
(Per Unit)

34.66
32.51
32.61
32.33
33.04
39.11
32.76
36.68
37.79

Number of
Shares

90,006
348,288
(62,355)
(17,114)
358,825
670,700
(151,555)
(51,822)
826,148

$

$

$

    
    
    
 
 
 
 
 
 
 
    
    
    
 
 
 
 
 
 
 
 
 
 
 
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As of December 31, 2021 and 2020, the unamortized compensation expense related to unvested stock options was

$54.5 million and $48.9 million, respectively. The remaining unamortized compensation expense will be recognized over
the next 2.62 years. At December 31, 2021 and 2020, the unamortized compensation expense was $2.3 million and $0.9 
million respectively under our ESPP. The remaining unamortized expense will be recognized over the next 1.94 years. At 
December 31, 2021 and 2020, the unamortized compensation expense related to unvested restricted stock units was $24.8 
million and $8.5 million, respectively. The remaining unamortized compensation expense will be recognized over the next 
1.95 years.

8. Leases

The Company leases office and laboratory space in Monrovia, California under a lease that expires in December

2025 with an option to renew for an additional five years at then market rates. In July 2017, under a separate lease
agreement, the Company entered into a lease 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 has assessed that it is unlikely to
exercise either of the lease term extension options.

The Company leases additional office space in San Diego, California through August 2022, with an option to

extend for an additional five years. The Company has assessed that it is unlikely to exercise the option to extend the lease
term.

In June 2021, the Company entered into an Agreement of Lease (the Halstead Lease) relating to 129,543 rentable

square feet, for laboratory and office space, in Pasadena, California, where the Company intends to move its corporate
headquarters in the second half of 2022. The term of the Halstead Lease will become effective in two phases. The first
phase commences on July 1, 2022 and encompasses 83,083 square feet while the second phase commences no later than
September 30, 2026 and encompasses an additional 46,460 square feet. The term of the Halstead Lease is 13 years from the
first phase commencement date. The Company received delivery of the first phase premises on July 1, 2021 and is
scheduled to complete construction of office, laboratory, and related improvements in the second half of 2022. The
Halstead Lease provides the Company with improvement allowances of up to $17,032,015 and $3,252,000 in connection
with the Phase 1 and Phase 2 building improvements, respectively. The initial base monthly rent is $386,335.95, or $4.65
per square foot, and includes increases of three percent annually. The Company will also be responsible for its
proportionate share of operating expenses, tax expense, and utility costs.

In July 2021, the Halstead Lease was amended to clarify the start date of the new lease as August 1, 2022 and to
amend other provisions of the Halstead Lease to reflect the new start date of the lease. For the year ended December 31,
2021, ROU assets obtained in exchange for new operating lease liabilities are $29.7 million.

In June 2021, the Company entered into an 18-month lease for a 7,020-square-foot office space in Monrovia,
California. The lease began on August 1, 2021, and the initial base monthly rent is $15,000.00. The Company received
delivery of the premises on July 19, 2021. For the year ended December 31, 2021, ROU assets obtained in exchange for
new operating lease liabilities are $0.3 million.

The Company’s lease agreements do not contain any residual value guarantees or restrictive covenants.

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The following table reconciles the undiscounted cash flows for the operating leases at December 31, 2021 to the

operating lease liabilities recorded on the balance sheet (in thousands):

Years ending December 31,
2022
2023
2024
2025
2026
Thereafter
Total undiscounted lease payments
Less: Tenant allowance
Less: Imputed interest
Present value of lease payments

Lease liabilities - long-term

$

$

$

2,097
5,566
5,713
5,817
5,279
52,117
76,589
(17,032)
(25,588)
33,969

33,969

The following table summarizes lease costs, cash, and other disclosures for the years ended December 31, 2021,

2020, and 2019 (in thousands):

Year Ended
December 31, 

2021

2020

2019

$

$

$

$

$

$

4,342
58
4,400

2,773

12.3

5.8%

$

$

$

2,503
150
2,653

2,233

7.4

5.5%

2,596
80
2,676

1,929

5.5

5.5%

Operating lease cost
Variable lease cost
Total lease costs

Cash paid for amounts included in

the measurement of lease liabilities
Weighted-average remaining lease term

—operating leases (in years)
Weighted-average discount rate

—operating leases

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.

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.

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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, 2021 and 2020.

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, 2021, 2020, and 2019. The revenue reported for each agreement has been
adjusted to reflect the adoption of ASC 606 for each period presented.

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.

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

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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.

No revenue was recognized for the year ended December 31, 2021; 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,
2021 or 2020 related to this agreement.

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 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 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.

In 2021, the Company recorded royalty revenue of $22.2 million on net sales.

The total revenue recognized under this arrangement was $22.2 million, $26.2 million, and $13.0 million for the

years ended December 31, 2021, 2020, and 2019, respectively. As of December 31, 2021, there is a receivable of $10.8
million, and there is no deferred revenue related to this agreement.

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. The Company also agreed to apply its bispecific technology to five
previously identified Amgen provided targets (each a Discovery Program). Amgen has advanced one of the discovery
programs into clinical development. The Company is eligible to receive up to $255.0 million in future development,
regulatory and sales milestones in total for the program and is eligible to receive royalties on any global net sales of
products.

In the third quarter of 2019, a $5.0 million milestone was recognized in connection with a development milestone

for a Discovery Program.

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During the year ended December 31, 2019, the Company recognized $5.0 million in revenue under this
arrangement. No revenue was recognized for the year ended December 31, 2021, or 2020. As of December 31, 2021, there
was no deferred revenue related to the arrangement.

Astellas Pharma Inc.

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 conducted 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.

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. 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.

Astellas has advanced an antibody that was delivered into development, and we received a milestone related to the

candidate in 2020. The Company recognized the $13.6 million of revenue 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.

No revenue was recognized for the year ended December 31, 2021. We recognized $3.5 million and $14.0 million

of revenue under this arrangement for the years ended December 31, 2020 and 2019, respectively. There is no deferred
revenue as of December 31, 2021.

Astria Therapeutics, Inc.

In May 2018, the Company entered into an agreement with Quellis, pursuant to which the Company provided

Quellis a non-exclusive license to its Xtend Fc technology to apply to an identified antibody. Quellis is responsible for all
development and commercialization activities. The Company received an equity interest in Quellis and is 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. In addition, the Company is eligible to receive royalties in the
mid-single digit percentage range on net sales of approved products.

In January 2021, Quellis merged into Catabasis, and the Company received common stock and preferred stock of
Catabasis in exchange for its equity in Quellis. The Company recognized an increase in the fair value of its equity interest
for the exchange of shares, which was recorded as unrealized gain for the three months ended March 31, 2021. In June
2021, a portion of the Company’s preferred stock in Catabasis was converted to common stock, which was recorded at its
fair value as of June 30, 2021. The remaining Catabasis preferred stock is carried at its original cost and is reviewed for
impairment or other changes at each reporting period. In August 2021, Catabasis effected a reverse stock split of its shares
of common stock at a ratio of 1:6, and in September 2021, Catabasis changed its name to Astria. The Company recorded an
impairment charge of $0.8 million for its investment in Astria preferred stock for the year ended December 31, 2021.

The Company recognized unrealized gain of $4.5 million related to its equity interest in Astria for the year ended

December 31, 2021. There is no deferred revenue as of December 31, 2021 related to this agreement.

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Bristol-Myers Squibb Company

In May 2021, the Company entered into a Technology License Agreement (the BMS Agreement ) with Bristol-

Myers Squibb Company (BMS) pursuant to which the Company provided a non-exclusive license to its Xtend technology
to extend the half-life of antibodies that specifically bind to SARS-CoV-2. Under the terms of the BMS Agreement, BMS
is responsible for all research, development, regulatory and commercial activities for antibodies, and the Company is
eligible to receive royalties on net sales of approved products in the low-single digit percentage range.

BMS initiated a Phase 2 study with a licensed antibody to treat patients with COVID-19 in the third quarter of

2021. No revenue was recognized for the year ended December 31, 2021. There is no deferred revenue as of December 31,
2021 related to this agreement.

Genentech, Inc., and F. Hoffmann-La Roche Ltd.

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 two-year research term expired in March 2021.

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.

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.

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, which expired in March 2021, to identify 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 were capable of
being 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 a potential additional IL-15 candidate and
research program were separate standalone performance obligations. The Genentech Agreement provided an outline of an
integrated research plan for the programs to be conducted by the two companies, and the research activities were 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

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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 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, and 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, and the $8.3 million allocated to the research activities was
recognized over a period of time through the end of the research term or the time that a program is delivered to Genentech.
The research term expired in the first half of 2021, and the balance in deferred revenue related to the Genentech Agreement
was recognized as the Company is no longer required to render services. A total of $2.5 million, $3.5 million, and $2.2
million of revenue related to the research activities was recognized for the years ended December 31, 2021, 2020, and
2019, respectively.

For the years ended December 31, 2021, 2020, and 2019, we recognized $2.5 million, $3.5 million, and $113.9

million of income, respectively from the Genentech Agreement. As of December 31, 2021, there is a $2.2 million payable
related to cost-sharing development activities during the fourth quarter of 2021. There is no deferred revenue as of
December 31, 2021.

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 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 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.

No revenue was recognized for the year ended December 31, 2021. 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, 2021 related to this agreement.

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INmune Bio, Inc.

In October 2017, the Company entered into a License Agreement (the INmune Agreement) with INmune. Under

the terms of the INmune Agreement, the Company provided INmune with an exclusive license to certain rights to a
proprietary protein, XPro1595. In connection with the agreement the Company received 1,585,000 shares of INmune
common stock and an option to acquire additional shares of INmune. The Company also received an option to
acquire 108,000 shares of INmune common stock with a designee appointed by us serving on the board of directors of
INmune.

The option had a six-year term from the date of the INmune Agreement and provided the Company the option to

purchase up to 10% of the fully diluted outstanding shares of INmune common stock for $10.0 million. The Company
initially recorded its equity interest in INmune, including its option to acquire additional INmune shares, at cost pursuant to
ASC 323.

In June 2021, the Company entered into the First Amendment to License Agreement (the Amended INmune

Agreement) and an Option Cancellation Agreement (the Option Agreement) with INmune. The Amended INmune
Agreement modified certain diligence provisions in the INmune Agreement with no change in total consideration or
performance obligations. The Option Agreement provided for the sale of the option to INmune for the total consideration
of $18.3 million which includes $15.0 million in cash and $3.3 million in additional shares of INmune common stock,
which represented an additional 192,533 shares of INmune common stock. The Company recorded a realized gain of
$18.3 million according to ASC 860, Transfer and Servicing, and recorded the additional investment of 192,533 shares of
INmune common stock according to ASC 321, Investments – Equity Securities.

During the three months ended June 30, 2021, the Company determined that it should no longer record its
investment in INmune under the equity method and recorded its investment in INmune pursuant to ASC 321. The
Company adjusted the carrying value of this investment by recognizing an unrealized gain of $27.8 million as other income
for the three months ended June 30, 2021.

In September 2021, the Company exercised its option to purchase 108,000 shares of INmune common stock for
$0.8 million. The Company recognized an unrealized gain of $2.0 million, which consists of $1.1 million of fair value of
the option and $0.9 million gain on the purchase, as other income for the three months ended September 30, 2021.

For the year ended December 31, 2021, the Company recorded $15.1 million of unrealized gain and $18.3 million

of realized gain related to its investment in INmune. No revenue was recognized for the year ended December 31, 2021,
2020, or 2019.

At the inception of the INmune Agreement in 2017, INmune was a related party as a result of the Company's

significant influence with respect to its investment in INmune, as determined under ASC 323. The Company did not have
any amounts due to or from INmune at December 31, 2021 or 2020. At June 30, 2021, the Company determined that it no
longer has a significant influence in INmune and that INmune is no longer a related party.

Janssen Biotech, Inc.

Janssen Agreement

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.

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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
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.

In November 2021, the Company completed its performance obligations under the research activities and

delivered CD28 bispecific antibodies to Janssen. In December 2021, Janssen selected a bispecific CD28 candidate for
further development, and we received a milestone of $5.0 million. For the year ended December 31, 2021 the Company
recognized as revenue the $50.0 million transaction price in connection with the completion of the research activities and
the $5.0 million milestone for selection of an antibody candidate by Janssen.

Second Janssen Agreement

On October 1, 2021, the Company entered into a second Collaboration and License Agreement (the Second
Janssen Agreement) with Janssen pursuant to which the Company granted Janssen an exclusive worldwide license to
develop, manufacture, and commercialize plamotamab, the Company’s CD20 x CD3 development candidate, and pursuant
to which Xencor and Janssen will conduct research and development activities to discover novel CD28 bispecific
antibodies. The parties will conduct joint research activities for up to a two-year period to discover XmAb bispecific
antibodies against CD28 and undisclosed B cell tumor-targets with Janssen receiving exclusive worldwide rights, subject to
certain Xencor opt-in rights, to develop, manufacture and commercialize pharmaceutical products that

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contain one or more of such discovered antibodies (CD28 Licensed Antibodies). The Agreement became effective on
November 5, 2021.

Pursuant to the Second Janssen Agreement, the Company received an upfront payment of $100.0 million and is
eligible to receive up to $1,187.5 million in milestones which include $289.4 million in development milestones, $378.1
million in regulatory milestones and $520.0 million in sales milestones. Under the terms of the Stock Purchase Agreement,
Johnson & Johnson Innovation, JJDC, Inc. (JJDC), agreed to purchase $25.0 million of newly issued unregistered shares of
the Company’s common stock, priced at a 30-day volume-weighted average price of $33.4197 per share as of October 1,
2021. The Company issued JJDC 748,062 shares of its common stock which had a fair market value of $28.9 million when
the shares were transferred.

The Company will collaborate with Janssen on further clinical development of plamotamab with Janssen and

share development costs with Janssen paying 80% and the Company paying 20% of certain development costs.

The Company is generally responsible for conducting research activities under the Second Janssen Agreement,

and Janssen is generally responsible for all development, manufacturing, and commercialization activities for CD28
Licensed Antibodies that are advanced.

Under the Second Janssen Agreement, the Company granted Janssen an exclusive worldwide right to its

plamotamab program and the Company will conduct research activities and apply its CD28 bispecific Fc technology to
antibodies targeting B-cells. Upon completion of the research activities Janssen will have options to advance up to four
identified candidates 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. If commercialized, the Company is eligible to receive royalties on net sales that range from the high-
single to low-double digit percentages.

The Company evaluated the Second Janssen Agreement under the provisions of ASC 606. We have determined

that Janssen is a customer for purposes of the delivery of specific performance obligations under the Second Janssen
Agreement and applied the provisions of ASC 606 to the transaction.

The Company identified the following performance obligations under the Second Janssen Agreement:

(i)

(ii)

the license to the plamotamab program, and

research services during a two-year period to create up to four CD28 bispecific candidates
targeting B-cell antigens.

The Company determined that the license and the research services are separate performance obligations because

they are capable of being distinct and are distinct in the context of the Second Janssen Agreement. The license to
plamotamab has standalone functionality as Janssen has exclusive worldwide rights to the program, including the right to
sublicense to third parties. Janssen has significant experience and capabilities in developing and commercializing drug
candidates similar to plamotamab, and Janssen is capable of performing these activities without the Company’s
involvement. Upon the transfer of the license of plamotamab and the related data and materials, Janssen could develop and
commercialize plamotamab without further assistance from the Company. The Company determined that the research
services for potential CD28 candidates was a separate standalone performance obligation. The Second Janssen 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 plamotamab.

The Company determined the standalone selling price of the license to be $58.5 million using the adjusted market

assessment approach considering similar collaboration and license agreements and transactions. The standalone selling
price for the research services to be performed during the research term was determined to be $37.6 million using the
market approach which was derived from the Company’s experience and information from providing similar research
services.

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The Company determined that the transaction price of the Second Janssen Agreement at inception was $96.1

million consisting of the $100.0 million upfront payment reduced by the $3.9 million discount on the proceeds received
from the sale of Company common stock to Janssen. 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 $58.5 million allocated to the license to the plamotamab program and $37.6 allocated to the
research services.

The Company recognized the $58.5 million allocated to the license when it satisfied its performance obligation

and transferred the license to Janssen in November 2021. The license was transferred upon the effective date of the Second
Janssen Agreement and when the Company subsequently transferred certain data related to the program to Janssen. The
$37.6 million allocated to the research services is being recognized over a period of time through the end of the research
term that services are rendered as we determine that the input method is the appropriate approach to recognize income for
such services. A total of $0.3 million of revenue related to the research services was recognized in the year ended
December 31, 2021.

The Company recognized $113.8 million of revenue related to the two Janssen agreements for the year ended

December 31, 2021. No revenue was recognized under this arrangement for the year ended December 31, 2020. There is
$37.3 million in deferred revenue as of December 31, 2021 related to our obligation to complete research activities and
deliver CD28 bispecific antibodies under the Second Janssen Agreement.

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 $12.5 million of milestone revenue related to clinical studies and $5.9 million

of royalty revenue on net sales of Monjuvi for the year ended December 31, 2021. The Company recognized a total of
$37.5 million of milestone revenue related to regulatory submission and approval of Monjuvi in the U.S, and royalties of
$1.5 million on net sales of Monjuvi for the year ended December 31, 2020. There was no revenue recognized under this
arrangement for the year ended December 31, 2019. As of December 31, 2021, the Company has no deferred revenue
related to this agreement and has recorded a receivable of $1.9 million for royalties due.

Novartis Institute for Biomedical Research, Inc.

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

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● 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.

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.

In August 2021, Novartis notified the Company it was terminating its rights with respect to the vibecotamab

program, which will be effective in February 2022. Under the Novartis Agreement, Novartis is responsible for its share of
vibecotamab development costs through August 2022.

We completed delivery of two Global Discovery Programs under the Agreement. 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 this Global Discovery Program.

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 two discovery
programs to Novartis and recognized $40.1 million of revenue in the period that each program was delivered. In the third
quarter of 2019, we received a $10.0 million milestone related to development activity for a Global Discovery Program,
and we recognized $10.0 million of revenue. The Company’s obligations to provide research services under the Agreement
for additional Global Discovery Programs expired in 2021, and we recognized $40.1 million of research revenue from
deferred revenue.

In June 2021, Novartis selected an Fc candidate and received a non-exclusive license to the Company’s Fc

technology. Novartis will assume full responsibility for development and commercialization of the licensed Fc product
candidate. The Company is eligible to receive development, clinical, and sales milestones and royalties on net sales of
approved products for the licensed Fc candidate. During the year-ended December 31, 2021, Novartis advanced the Fc
candidate into development and initiated clinical studies and the Company recognized $3.0 million of revenue related to
the milestones.

During the year ended December 31, 2021 and 2019, the Company recognized $43.1 million and $10.0 million of
revenue, respectively. No revenue was recognized during the year ended December 31, 2020. There is a receivable of $0.6
million as of December 31, 2021 related to the arrangement, and there is no deferred revenue as of December 31, 2021
related to the arrangement.

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.

The Company recognized $5.0 million of revenue related to the Omeros Agreement for the year ended December

31, 2020. There was no revenue recognized for the year ended December 31, 2021. There is no deferred revenue as of
December 31, 2021 related to this agreement.

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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 a total of $1.5 million in upfront and milestone payments and is eligible
to receive additional milestones of $154.5 million which include $4.5 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.

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. In
May 2021, the FDA granted emergency use authorization (EUA) to Vir’s COVID-19 antibody, sotrovimab (VIR-7831), for
the treatment of mild-to-moderate COVID-19 in high-risk adult and pediatric patients. In December 2021, the European
Union, and several other countries authorized sotrovimab for the treatment of mild-to-moderate COVID-19 in high-risk
adult and pediatric patients. Vir and its marketing partner, GSK, began recording sales for sotrovimab beginning in June
2021. In 2021, we recognized royalty revenue of $52.2 million related to this agreement.

In February 2021, the Company entered into the Vir Amendment No. 1 to the Vir Agreement and the Vir
Amendment No. 1 to the Second Vir Agreement (collectively, the Vir Amendments), in each case, pursuant to which the
Company provided a non-exclusive license to additional Fc technology for the targets previously identified in the Vir
Agreement and the Second Vir Agreement, respectively. If Vir incorporates additional Fc technologies in the identified
targets, the Company is eligible to receive additional royalties on net sales of approved products from low to mid-single
digit range.

The Company determined that the Second Vir Agreement and the Vir Amendments were modifications of the

original Vir Agreement, and that 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 or the Amendments as the Company
will potentially receive additional royalty revenue which is variable consideration and is not included in the transaction
price.

In June 2021, Vir announced its plan to initiate a Phase 2 study for VIR-3434 and subsequently completed dosing
of the first patient in such study in July 2021. The Company recorded a $0.5 million contract asset in connection with this
milestone event, and the payment was received in August 2021.

The Company recognized $52.7 million, $0.3 million, and $0.8 million of revenues related to the agreement for
the years ended December 31, 2021, 2020, and 2019, respectively. There is no deferred revenue as of December 31, 2021
related to this agreement. As of December 31, 2021, the Company has recorded a receivable of $45.0 million for royalties
due related to this agreement.

Viridian Therapeutics, Inc.

In December 2020, we entered into a Technology License Agreement (Viridian Agreement) with Viridian

Therapeutics, Inc. (Viridian), in which we provided Viridian a non-exclusive license to our Xtend Fc technology and an
exclusive license to apply our Xtend Fc technology to antibodies targeting IGF-1R. 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

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

The Company evaluated the Viridian 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 Viridian 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 Viridian 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 Viridian 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 $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 Viridian began benefiting access to it.

In December 2021, we entered into a second Technology License Agreement (Second Viridian Agreement) with
Viridian for a non-exclusive license to certain antibody libraries developed by us. Under the Second Viridian Agreement,
Viridian received a one-year research license to review the antibodies and the right to select up to three antibodies for
further development. Viridian is responsible for all further development of the selected antibodies. We received an upfront
payment of 394,737 shares of Viridian common stock valued at $7.5 million and are eligible to receive up to $24.75
million in milestones, which include $1.75 million in development milestones, $3.0 million in regulatory milestones and
$20.0 million in sales milestones in addition to royalties on net sales of approved products under the Second Viridian
Agreement.

The Company evaluated the Second Viridian 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 certain antibody libraries created by the Company

The Company considered the license as functional intellectual property as Viridian has the right to use the

materials and license at the time that the Company transfers such rights.

The total transaction price is $7.5 million, which includes the upfront payment of 394,737 Viridian 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 Viridian 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 $7.5 million of the transaction price to the licenses to the antibody libraries and

recognized income for the licenses at inception of the arrangement when Viridian received the materials and began
accessing them.

The Company recognized $7.5 million and $6.0 million of revenue related to the Viridian Agreement for the year

ended December 31, 2021 and 2020, respectively. There is no deferred revenue as of December 31, 2021 related to this
agreement.

Zenas BioPharma Limited

In November 2020, the Company entered into a License Agreement (Zenas Agreement) with Zenas BioPharma

Limited (Zenas) pursuant to which the Company granted Zenas exclusive worldwide rights to develop and

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commercialize to three preclinical-stage Fc-engineered drug candidates: XmAb6755, Xpro9523, and XmAb10171. Under
the Zenas Agreement, Zenas will be responsible for all further development and commercialization activities for
XmAb6755, Xpro9523, and XmAb10171. The Company received a 15% equity interest in Zenas 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 Zenas Agreement, Zenas received exclusive worldwide rights to manufacture, develop and

commercialize XmAb6755, Xpro9523, and XmAb10171. Zenas also received the rights to all data, information, and
research materials related to the three preclinical stage programs.

The Company evaluated the Zenas 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 XmAb10171 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 Zenas has the right to use each of

XmAb6755, Xpro9523 and XmAb10171 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 Zenas 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 Zenas at
its fair value at the date of the Zenas Agreement. The Zenas 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 Zenas Agreement and allocated it to the

performance obligation, delivery of the XmAb6755, Xpro9523, and XmAb10171 licenses.

The Company completed delivery of its performance obligations in December 2020. The licenses to XmAb6755,
Xpro9523, and XmAb10171 were transferred to Zenas at inception of the Zenas Agreement, and the related research data
and documentation was transferred to Zenas in December 2020.

In November 2021, the Company entered into a second License Agreement (Second Zenas Agreement) with
Zenas, in which we licensed the exclusive worldwide rights to develop and commercialize the Company’s obexelimab
(XmAb5871) drug candidate. Under the Second Zenas Agreement, Zenas will be responsible for all further development
and commercialization activities for obexelimab. The Company received a warrant to acquire additional equity in Zenas
with a fair value of $14.9 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. We are also eligible to receive up to $470.0 million based on the
achievement of certain clinical development, regulatory and commercialization milestones and are eligible to receive
tiered, mid-single digit to mid-teen percent royalties upon commercialization of obexelimab, dependent on geography.
Zenas will have sole responsibility for advancing the research, development, regulatory and commercial activities of
obexelimab worldwide.

The Company evaluated the Second Zenas 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 obexelimab drug candidate; and

● rights to material, data, and information that the Company had accumulated in connection with conducting

clinical activities for the program and intellectual property filings and information.

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The Company considered the license as functional intellectual property as Zenas has the right to use obexelimab at

the time that the Company transfers such rights. The rights to the obexelimab program data are not considered to be
separate from the license to program as Zenas cannot benefit from the license without the supporting data and
documentation.

The total transaction price is $14.9 million, which includes the upfront payment of a warrant to acquire up to 15%

of the equity of Zenas in connection with a future financing at its fair value at the date of the Second Zenas Agreement.
The Second Zenas 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 Second Zenas Agreement and allocated it to the

performance obligation, delivery of the obexelimab license.

The Company completed delivery of its performance obligations in December 2021. The licenses to obexelimab

were transferred to Zenas at inception of the Second Zenas Agreement, and the related research data and documentation
was transferred to Zenas in December 2021.

The Company recognized $14.9 million and $16.1 million of revenue related to the two Zenas Agreements for the

years ended December 31, 2021 and 2020, respectively. There is no deferred revenue as of December 31, 2021 related to
this agreement.

Revenue Earned

The $275.1 million, $122.7 million, and $156.7 million of revenue recorded for the years ended December 31,

2021, 2020, and 2019, respectively, were earned principally from the following licensees (in millions):

Aimmune
Alexion
Amgen
Astellas
Genentech
Gilead
Janssen
MorphoSys
Novartis
Omeros
Vir
Viridian
Zenas
Total

Year Ended
December 31, 
2020

2019

2021

$

—     

$

22.2
—
—
2.5
—
113.8
18.4
43.1
—
52.7
7.5
14.9
275.1

$

$

115

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

$

$

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

 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

The table below summarizes the disaggregation of revenue recorded for the years ended December 31, 2021,

2020, and 2019 (in millions):

Research collaboration
Milestone
Licensing
Royalties
Total

2021

93.0     
21.0
80.8
80.3
275.1

$

$

$

$

Year Ended
December 31, 
2020

4.5     
50.2
50.2
17.8
122.7

$

$

2019

16.3
23.2
112.2
5.0
156.7

Remaining Performance Obligations and Deferred Revenue

The Company’s remaining performance obligation as of December 31, 2021 is conducting research activities

pursuant to research plans under the Second Janssen Agreement. As of December 31, 2021 and 2020, we have deferred
revenue of $37.3 million and $92.6 million, respectively. The Company completed its performance obligations for research
activities pursuant to the Astellas Agreement in the second quarter of 2020. The Company’s obligation to perform research
services for Genentech and to deliver additional Global Discovery Programs under the Novartis Agreement ended upon
expiration of the respective research terms for each agreement in the second quarter of 2021. All of the deferred revenue
was classified as short term as of December 31, 2021 and 2020, respectively, as the Company’s obligations to perform
research services are due on demand when requested by Novartis, Genentech, and Janssen under the respective
Agreements.

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, 2021, 2020, and 2019 were $1.1 million, $0.8 million, and
$0.6 million, respectively.

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, 2021. 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 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, 2021 at the reasonable assurance level.

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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, 2021. 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, 2021, 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,

2021, 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, 2021 and has issued an audit report on the effectiveness of the Company’s internal control over
financial reporting as of December 31, 2021, which is included in Item 8 of this Annual Report.

Item 9B.  Other Information

Not applicable.

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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 https://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, 2021 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.

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

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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*

10.4*

10.5*

10.6*

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).

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).

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10.7*

10.8*

10.9†

10.10†

10.11

10.12

10.13†

10.14*

10.15*

10.16*

10.17†

10.18†

10.19

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).

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).

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).

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).

120

Table of Contents

10.20

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).

10.21†

10.22*

10.23*

10.24*

10.25

10.26*

10.27

10.28

10.29

10.30

10.31

10.32

10.33

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. (incorporated by reference to Exhibit 10.29 to the Company’s Form 10-K
filed with the SEC on February 23, 2021).

Second Amendment to the License Agreement, dated January 8, 2020, by and between the Company and
MorphoSys AG (incorporated by reference to Exhibit 10.31 to the Company’s Form 10-K filed with the
SEC on February 23, 2021).

Third Amendment to the License Agreement, dated July 13, 2020, by and between the Company and
MorphoSys AG (incorporated by reference to Exhibit 10.32 to the Company’s Form 10-K filed with the
SEC on February 23, 2021).

Fifth Amendment to Lease, dated October 31, 2020, by and between the Company and 111 Lemon
Investors LLC (incorporated by reference to Exhibit 10.33 to the Company’s Form 10-K filed with the
SEC on February 23, 2021).

Collaboration and License Agreement, dated December 4, 2020, by and between the Company and
Janssen Biotech, Inc. (incorporated by reference to Exhibit 10.34 to the Company’s Form 10-K filed with
the SEC on February 23, 2021).

First Amendment to the Collaboration and License Agreement, dated March 10, 2021, by and between
the Company and Genentech, Inc. and F. Hoffmann-La Roche LTD (incorporated by reference to Exhibit
10.1 to the Company’s Form 10-Q filed with the SEC on May 5, 2021).

121

Table of Contents

10.34*

10.35

10.36

10.37

Form of Restricted Stock Unit Agreement (incorporated by reference to Exhibit 10.1 to the Company’s
Current Report on Form 8-K, filed with the SEC on March 10, 2021).

Second Amendment to the Collaboration and License Agreement, dated June 30, 2021, by and between
the Company and Genentech, Inc., and F. Hoffmann-La Roche LTD (incorporated by reference to
Exhibit 10.1 to the Company’s Form 10-Q filed with the SEC on August 4, 2021).

Agreement of Lease, dated April 30, 2021, by and between the Company and Angelo Gordon Real
Estate, Inc. (incorporated by reference to Exhibit 10.2 to the Company’s Form 10-Q filed with the SEC
on August 4, 2021).

First Amendment to Lease, dated July 13, 2021, by and between the Company and Angelo Gordon Real
Estate, Inc. (incorporated by reference to Exhibit 10.3 to the Company’s Form 10-Q filed with the SEC
on August 4, 2021).

10.38*

Xencor, Inc. Amended and Restated Non-Employee Director Compensation Policy.

10.39†

Collaboration and License Agreement, dated October 1, 2021, by and between the Company and Janssen
Biotech, Inc.

23.1

31.1

31.2

32.1**

32.2**

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.

122

Table of Contents

Item 16.  Form 10-K Summary

None.

123

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 24, 2022

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 24, 2022

/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

124

February 24, 2022

February 24, 2022

February 24, 2022

February 24, 2022

February 24, 2022

February 24, 2022

February 24, 2022

February 24, 2022

XENCOR, INC.
AMENDED AND RESTATED NON-EMPLOYEE DIRECTOR COMPENSATION POLICY

Exhibit 10.38

Each member of the Board of Directors (the “Board”)  who is a member  as  of  July  1,  2021  (the
“Effective Date”) and who is not also serving as an employee of Xencor, Inc. (“Xencor”) or any of
its  subsidiaries  (each  such  member,  an  “Eligible  Director”)  will  receive  the  compensation
described in this Amended and Restated Non-Employee Director Compensation Policy for his or
her  Board  service.  This  policy  is  effective  as  of  the  Effective  Date  and  may  be  amended  at  any
time in the sole discretion of the Board.

Annual Cash Compensation

Eligible Directors will be paid the following annual cash compensation amounts, payable in equal
quarterly installments, payable in arrears on the last day of each fiscal quarter in which the service
occurred. If an Eligible Director joins a committee of the Board or the Board at a time other than
effective as of the first day of a fiscal quarter, each annual retainer set forth below will be pro-rated
based on days served in the applicable fiscal year, with the pro-rated amount paid for the first fiscal
quarter  in  which  the  Eligible  Director  provides  the  service,  and  regular  full  quarterly  payments
thereafter. All cash fees are vested upon payment.

1.

2.

3.

Annual Board Service Retainer:
a.
b.

Eligible Directors other than the Chair: $50,000
Chair: $70,000

Annual Committee Chair Service Retainer:
a.
b.
c.
d.

Chair of the Audit Committee: $20,000
Chair of the Compensation Committee: $17,000
Chair of the Nominating & Corporate Governance Committee: $13,000
Chair of the Research & Development Committee: $15,000

Annual Committee Member (other than Committee Chair) Service Retainer:
a.
b.
c.
d.

Member of the Audit Committee: $10,000
Member of the Compensation Committee: $8,500
Member of the Nominating & Corporate Governance Committee: $6,500
Member of the Research & Development Committee: $7,500

Equity Compensation

The  equity  compensation  set  forth  below  will  be  granted  under  the  Xencor,  Inc.  2013  Equity
Incentive Plan (the “Plan”) as may be amended from time to time. All stock options granted under
this policy will be nonstatutory stock options, with an exercise price per share equal to 100% of the
Fair Market Value (as defined in the Plan) of the underlying Common Stock on the date of grant,
and a term of ten years from the date of grant (subject to earlier termination in connection with a
termination of service as provided in the Plan).  

1.

1.
Initial Grant:  On  the  date  of  the  Eligible  Director’s  initial  election  to  the  Board,  for  each
Eligible Director who is first elected to the Board following the Effective Date (or, if such date is
not  a  market  trading  day,  the  first  market  trading  day  thereafter),  the  Eligible  Director  will  be
automatically, and without further action by the Board or Compensation Committee of the Board,
granted  a  stock  option  to  purchase  shares  of  Common  Stock  with  an  aggregate  Black  Scholes
option value of $550,000.  For the avoidance of doubt, Eligible Directors who are serving on the
Board at the Effective Date will not be awarded an initial grant. One-third of the shares subject to
each stock option will vest on the one year anniversary of the date of grant and the balance of the
shares will vest in a series of 24 equal monthly installments thereafter, such that the option is fully
vested on the third anniversary of the date of grant, subject to the Eligible Director’s Continuous
Service (as defined in the Plan) through each such vesting date and will vest in full upon a Change
in Control (as defined in the Plan).

2.
Annual Grant: On the date of each of Xencor’s annual stockholder meeting held after the
Effective Date, each Eligible Director who continues to serve as a non-employee member of the
Board  (or  who  is  first  elected  to  the  Board  at  such  annual  stockholder  meeting)  will  be
automatically, and without further action by the Board or Compensation Committee of the Board,
granted  a  stock  option  to  purchase  shares  of  Common  Stock  with  an  aggregate  Black  Scholes
option value of $300,000. The shares subject to the stock option will vest in a series of 12 equal
monthly  installments,  such  that  the  option  is  fully  vested  on  the  one  anniversary  of  the  date  of
grant, subject to the Eligible Director’s Continuous Service (as defined in the Plan) through each
such vesting date and will vest in full upon a Change in Control (as defined in the Plan).

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.

Exhibit 10.39

COLLABORATION AND LICENSE AGREEMENT

BY AND BETWEEN

XENCOR, INC.

AND

JANSSEN BIOTECH, INC.

Dated October 1, 2021

Table of Contents

ARTICLE 1 DEFINITIONS
ARTICLE 2 GOVERNANCE

2.1

2.2

2.3

2.4

2.5

2.6

2.7

Joint Research Committee.

Joint Development Committee.

Joint Finance Committee.

Meetings and Minutes.

Decision-Making.

Subcommittees.

Alliance Managers.

ARTICLE 3 RESEARCH PROGRAM FOR LICENSED CD28 ANTIBODIES AND
LICENSED CD28 PRODUCTS

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

Overview.

Research Plan.

Conduct of Research Program Activities.

Binding Domains.

Research Program Costs.

Records; Reports.

Candidate Selection; Antigen Selection.

Materials.

ARTICLE 4 DEVELOPMENT, MANUFACTURE AND COMMERCIALIZATION OF
LICENSED CD28 ANTIBODIES AND LICENSED CD28 PRODUCTS

4.1

4.2

4.3

4.4

General – Licensed CD28 Products.

Xencor Assistance for Licensed CD28 Products.

[Reserved].

Conduct of Licensed CD28 Product Activities.

ARTICLE 5 DEVELOPMENT, MANUFACTURE AND COMMERCIALIZATION OF
PLAMOTAMAB AND PLAMOTAMAB PRODUCTS

5.1

5.2

5.3

Development of Plamotamab Products.

Commercialization of Plamotamab Products.

Manufacturing of Plamotamab Products.

i

Page

1
29

29

29

30

30

31

34

34

34

34

35

35

35

36

36

36

38

39

39

39

39

39

40

40

55

56

ARTICLE 6 XENCOR OPTION RIGHTS FOR LICENSED CD28 PRODUCTS;
DILIGENCE

6.1

6.2

6.3

6.4

6.5

General.

CD28 Co-Funding Option.

CD28 Co-Detailing Option.

Diligence Obligations.

Preliminary Licensed CD28 Products Diligence.

ARTICLE 7 FINANCIAL PROVISIONS

7.1

7.2

7.3
7.4

7.5

7.6

7.7

Upfront Payment.

Development and Regulatory Milestones.

Sales Milestones.
Royalties.

Payment Terms.

Records; Audits.

Taxes.

ARTICLE 8 LICENSE GRANTS; EXCLUSIVITY

8.1

8.2

8.3

8.4

Grants.

Sublicensing.

No Implied Licenses.

Exclusivity.

ARTICLE 9 INTELLECTUAL PROPERTY

9.1

9.2

9.3

9.4
9.5

9.6

9.7
9.8

9.9

Patent Representatives.

Inventions.

Prosecution of Patents.

Patent Enforcement.
Patent Term Extensions.

Regulatory Data Protection.

Patent Invalidity Claims.
Claimed Infringement.

Acquirer Intellectual Property.

9.10

Trademarks.

ARTICLE 10 CONFIDENTIALITY AND PUBLICITY

10.1

10.2

Non-Disclosure and Non-Use.

Exceptions.

ii

57

57

57

69

71

77

77

77

77

89
91

103

104

105

106

106

108

109

109

113

113

113

115

119
123

123

123
124

124

125

125

125

126

10.3

10.4

10.5

10.6
10.7

10.8

Authorized Disclosure.

Terms of Agreement.

Publicity.

Prior Non-Disclosure Agreement.
Equitable Relief.

Publications.

ARTICLE 11 REPRESENTATIONS AND WARRANTIES; CERTAIN COVENANTS

Representations of Authority.

Consents.

No Conflict.

Enforceability.

Additional Representations and Warranties of Xencor for Licensed CD28

Additional Representations and Warranties of Xencor for Plamotamab Products. 
133

11.1

11.2

11.3

11.4

11.5
Products.

11.6

11.7

11.8

11.9

11.10

11.11

No Warranties.

No Debarment or Exclusion.

Compliance with Anti-Corruption Laws.

Additional Third Party Technology.

[***]

ARTICLE 12 INDEMNIFICATION; INSURANCE

12.1

12.2
12.3

12.4

Indemnification by Janssen.

Indemnification by Xencor.
Indemnification Procedures.

Insurance.

ARTICLE 13 TERM AND TERMINATION

13.1

13.2

13.3

13.4

13.5

Term.

Termination for Material Breach.

Other Rights of Termination.

Provisions for Insolvency.

Effects of Termination or Expiration.

ARTICLE 14 EFFORTS TO OBTAIN CLEARANCES

14.1

14.2

Commercially Reasonable Efforts.

Antitrust Filing.

iii

127

128

128

128
129

129

130
130

130

130

130

130

135

136

136

139

139

140

140

140
141

142

142

142

143

143

145

146

154

154

154

ARTICLE 15 DISPUTE RESOLUTION

15.1

15.2

15.3

15.4

15.5

Exclusive Dispute Resolution Mechanism.

Referral to Executive Officers.

Mediation.

Arbitration.

Waiver.

ARTICLE 16 MISCELLANEOUS

16.1

16.2

16.3
16.4

16.5

16.6

16.7

16.8

16.9

16.10

16.11

16.12

16.13

16.14

16.15

16.16

Assignment; Successors.

Performance by Affiliates.

Subcontracting.
No Consequential or Punitive Damages.

Choice of Law.

Submission to Jurisdiction.

Notices.

Severability.

Captions.

Further Actions.

Amendment; No Waiver.

Integration.

Independent Contractors; No Agency.

Force Majeure.

Counterparts; Signatures.

Construction.

iv

156

156

156

156

156

158

158
158

158

159
159

159

159

160

161

162

162

162

162

162

162

163

163

COLLABORATION AND LICENSE AGREEMENT

This Collaboration and License Agreement (the “Agreement”) is made and effective as of October
1, 2021 (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  CD28  Antibodies,  Licensed
CD28 Products, Plamotamab and Plamotamab 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 CD28 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  CD28  Antibodies,  Licensed  CD28  Products,
Plamotamab and Plamotamab 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

1.1
transaction and any of such Third Party’s Affiliates.  

“Acquirer”  means  any  Third  Party  that  is  a  counterparty  in  any  Change  of  Control

1.2
“Action” means any claim, action, cause of action or suit (whether in contract or tort or
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

[***] = 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

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.

1.4

“Antibody” means [***].

“Binding Domain” means the region of an Antibody that binds to the antigen targeted by
1.5
such Antibody (or if such Antibody is multivalent, binds to one of the epitopes targeted by such
Antibody) [***].

1.6

“Bispecific” in reference to an Antibody means [***].  

1.7
open for business.

“Business Day” means a day on which banking institutions in New York, New York are

1.8
Calendar for that quarter (a copy of which is attached hereto as Exhibit 1.8).

“Calendar  Quarter”  means  a  quarter  based  on  the  Johnson  &  Johnson  Universal

“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
subunit and is capable of activating cytotoxic T cells.  

“CD3 Binding Domain” means a Binding Domain that binds any epitope of CD3 epsilon

1.11

“CD20 Binding Domain” means a Binding Domain which binds any epitope of CD20.

1.12

“CD28 Binding Domain” means a Binding Domain which binds any epitope of CD28.

“CD28/Plamotamab Combination” means a CD28/Plamotamab Combination Product or

1.13
a CD28/Plamotamab Combination Regimen.

1.14
“CD28/Plamotamab  Combination  Product”  means  (a)  any  product  containing  a
Licensed CD28 Antibody and Plamotamab in a fixed-dose formulation, or (b) any combination of
a Licensed CD28 Product and a Plamotamab Product sold together in a single package or container
for a single price.

“CD28/Plamotamab  Combination  Regimen”  means  a  Combination  Regimen  that  (a)
1.15
includes a Licensed CD28 Product and a Plamotamab Product and (b) is not a CD28/Plamotamab
Combination Product.  

1.16
respect to Xencor (and any of its successors):

“Change  of  Control”  means,  at  any  time  on  or  after  the  date  of  this  Agreement,  with

group (within the meaning of Section 13(d)(3) or 14(d)(2) of the Exchange Act) (a “Specified

(a)

the  acquisition,  directly  or  indirectly,  by  any  individual,  entity  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.

2

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;

(c)

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,  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  Licensed  CD28  Antibodies,  Licensed
CD28 Products, Plamotamab and Plamotamab Products.

[***] = 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

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)  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.

[***] = 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

“Clinical Study”  means  any  study  in  which  human  subjects  are  dosed  or  treated  with  a

1.17
drug or biological product, whether approved or investigational.

1.18
“Combination Product” means (a) any product containing a Licensed CD28 Antibody or
Plamotamab  and  one  or  more  other  active  compounds  or  active  ingredients  in  a  fixed-dose
formulation, or (b) any combination of a Licensed CD28 Product or a Plamotamab Product sold
together with another drug or biological product in a single package or container for a single price
(a  “Combination  Copack”).  For  clarity:  (i)  a  CD28/Plamotamab  Combination  Product  is  a
Combination Product; and (ii) a CD28/Plamotamab Combination Product where a Licensed CD28
Product and a Plamotamab Product are sold together in a single package or container for a single
price is a Combination Copack.  

1.19
“Combination  Regimen”  means  the  administration  of  two  or  more  drugs  or  biological
products together for the treatment, diagnosis or prophylaxis of any Indication, where such drugs
or  biological  products  are  packaged  and  sold  separately  or  are  otherwise  not  a  Combination
Product.  For clarity, a CD28/Plamotamab Combination Regimen is a Combination Regimen.

1.20
“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.

“Commercialization Approval” means, with respect to a Product, as applicable, and any

1.21
country or regulatory jurisdiction, receipt of [***].

1.22

“Commercially Reasonable Efforts” means [***].

1.23

“Committee” means the JRC, JDC or JFC.

“Consent” means,  with  respect  to  a  certain  matter,  that  Xencor  has  provided  consent  to

1.24
such matter as evidenced in a writing executed by Xencor.

“Controlled”  or  “Control”  means,  when  used  in  reference  to  Know-How,  Patents,
1.25
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  or
otherwise  violating  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)

[***] = 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

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.  [***].    

1.26
“Cover,” “Covering”  and  “Covered”  means,  with  respect  to  a  Patent  and  an  invention,
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 [***].  

1.27
“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.

1.28
“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.

1.29

“Derivative” [***] means [***].  

1.30
“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  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.

1.31

“Development” (or to “Develop”) 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”);

[***] = 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

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.

“Development  Budget”  means 

1.32
Development Budget, as applicable.  

the  CD28  Development  Budget  or  Plamotamab

1.33
Plan, as applicable.

“Development  Plan”  means  the  CD28  Development  Plan  or  Plamotamab  Development

1.34

“Diligent Efforts” means [***].

1.35

“DOJ” means the United States Department of Justice.

1.36
“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 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”).

1.37
“Early Access Program” or “EAP” means any program to provide patients in a country
with a Licensed CD28 Product or Plamotamab Product, as applicable, before receipt of Marketing
Approval and before First Commercial Sale in such country in which the use of the Product is not
primarily  intended  to  obtain  information  about  the  safety  or  effectiveness  of  such  Product,
including Treatment INDs / Protocols, Named Patient Programs and Compassionate Use programs.
 For clarity, an EAP with respect to a Product may continue to be performed

[***] = 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

following receipt of Marketing Approval of such Product and costs may continue to be incurred in
accordance with the performance of such EAP after Marketing Approval.

1.38
“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.

1.39

“EMA” means the European Medicines Agency or any successor agency thereto.

1.40
“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.

1.41

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“Existing Third Party Agreements” means the agreements between Xencor and a Third

1.42
Party set forth on Schedule 1.42.  

1.43
“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

1.44
thereto.

1.45

“Field” means all diagnostic, prophylactic and therapeutic uses.

1.46
“First  Commercial  Sale”  means,  with  respect  to  a  Product  in  a  country,  the  first
commercial sale of such 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
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 Product made on a named patient basis
will not constitute a First Commercial Sale for the purposes of this definition.

1.47

“First Phase 3 Commencement Date” means [***].

1.48

“FTC” means the United States Federal Trade Commission.

1.49
“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.

[***] = 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

1.50
“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  CD28  Product  or  Plamotamab  Product,  as  applicable,  is  intended  to  be  tested  to  the
extent such standards are not less stringent than United States Good Clinical Practice.

1.51
“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 CD28 Product or Plamotamab Product, as applicable, is intended
to be sold, to the extent such standards are not less stringent than United States Good Laboratory
Practice.

1.52
“Good Manufacturing Practice” or “GMP” means the part of quality assurance which
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.

1.53
“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.

1.54
“Government Health Care Programs” means the Medicare program (Title XVIII of the
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.

1.55
amended, and the rules and regulations promulgated thereunder.

“HSR  Act”  means  the  Hart-Scott-Rodino  Antitrust  Improvements  Act  of  1976,  as

1.56
“IND/CTA” means an Investigational New Drug Application filed with FDA or a similar
application filed with an applicable Regulatory Authority outside of the United States, such as a
clinical trial application or a clinical trial notification, or any other equivalent or related regulatory
submission, license or authorization.

1.57

“Indication” means [***].

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.

1.58
“Janssen  Binding  Domain”  means  (a)  any  Janssen  proprietary  Target  B-Cell  Antigen
Binding  Domain  designated  and  provided  by  Janssen  to  Xencor  for  incorporation  into  Licensed
CD28 Antibodies under the Research Program under Section 3.4.1, or (b) [***].

“Janssen  Research  Intellectual  Property”  means,  collectively,  the  Janssen  Research

1.59
Know-How and Janssen Research Patents.

1.60
“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  CD28
Antibodies.

1.61
“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.

1.62
“Know-How” means all technical, scientific and other know-how and information, trade
secrets,  knowledge,  technology,  means,  methods,  processes,  practices,  formulas,  instructions,
skills, techniques, procedures, ideas, 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.  

1.63
“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.

1.64

“Licensed CD28 Antibody” means: [***].

1.65
“Licensed CD28 Product” means any pharmaceutical product in any form containing one
or  more  Licensed  CD28  Antibodies  as  an  active  ingredient,  in  any  dosage  form,  formulation  or
method of delivery.  

“Major  European  Countries”  means  France,  Germany,  Italy,  Spain  and  the  United

1.66
Kingdom.

“Manufacturing”  or  “Manufacture”  means  activities  directed 

1.67
to  producing,
manufacturing,  processing,  filling,  finishing,  packaging,  labeling,  quality  assurance  testing  and
release, shipping and storage of a drug or biological product.

[***] = 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

1.68
applicable Regulatory Authority.

“Marketing  Approval”  means  approval  of  a  Drug  Approval  Application  by  the

1.69

[***].

1.70

[***].

1.71

“MHLW” means the Ministry of Health, Labour and Welfare in Japan.

1.72

[***]

1.73
“Net Sales” means the gross amounts invoiced on sales of a Product (including, for clarity,
sales  of  a  Product  that  is  a  Combination  Product  or  sales  of  a  Product  for  use  in  a  Combination
Regimen) 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  the  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 Product (including for use in a Combination Regimen);

fees,  and  discounts 

in the price and separately itemized on the invoice price;

(e)

outbound freight, shipment and insurance costs to the extent included

[***] = 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

retroactive  price  reductions,  credits  or  allowances  actually  granted
upon  claims,  rejections  or  returns  of  the  Product  (including  for  use  in  a  Combination  Regimen),
including for recalls or damaged or expired goods, billing errors and reserves for returns;

(f)

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  the  applicable  Product  and  other  products  of  Janssen  and  its
Affiliates  and  sublicensees  such  that  the  applicable  Product  does  not  bear  a  disproportionate
portion of such deductions.

Sales of a 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 Product is
subsequently resold to a Third-Party end user such resale shall be included in the determination of
Net Sales.

Sales  of  a  Product  for  the  use  in  conducting  Clinical  Studies  of  the  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  Product  (including  for  use  in  a  Combination  Regimen)  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  a  Product  as  free  samples,  donations,  or  patient  assistance  will  be  excluded
from Net Sales calculations for all purposes.

If  the  applicable  product  is  a  Combination  Product  that  is  not  a  Solely  CD28/Plamotamab
Combination  Product,  the  Parties  will  negotiate  in  good  faith,  at  the  latest  [***]  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 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.

[***] = 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

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:

(i)

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 applicable Product component contained
in the Combination Product, if sold separately or subject to reasonable estimation, 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  applicable  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
[***] 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  price  of
each component while such matter is being discussed and until it is resolved in accordance with
this Section or Section 2.5.1.5.

1.74

“Non-Selected B-Cell Antigen” means [***].

1.75

“Non-Selected B-Cell Antigen Binding Domain” means [***].

1.76

“OUS Territory” means the Territory excluding the U.S.  

1.77
“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.

[***] = 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.

13

“Person” means any individual, firm, corporation, partnership, limited liability company,

1.78
trust, business trust, joint venture, governmental authority, association or other entity.

1.79
“Phase 1 Study” means a Clinical Study of a 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.  

1.80
“Phase  1/2  Study”  means  a  Clinical  Study  of  a  Product  that  combines  both  a  Phase  1
Study and a Phase 2 Study of such Product into a single protocol, where the Phase 1 Study portion
tolerability,  pharmacokinetic  and
is  performed  first 
pharmacodynamic  information  for  the  product  or  (ii)  determine  the  Maximum  Tolerable  Dose
(“MTD”) of such Product in subjects, and the Phase 2 Study portion is performed second with a
selected dose.  [***].

initial  safety, 

to  establish 

to  (i) 

1.81
“Phase 2 Study” means a Clinical Study of a Product, as applicable, 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  Product;  or  (b)  that  meets  the
definition in 21 C.F.R. §312.21(b) or any of its foreign equivalents.  

1.82

“Phase 2/3 Study” means either:

a Phase 3 Study of such Product into a single protocol; or

(a)

a Clinical Study of a Product that combines both a Phase 2 Study and

(b)

a  Phase  2  Study  involving  a  sufficient  number  of  subjects  that,
following commencement of the study, becomes a Phase 3 Study, as evidenced by (i) an agreement
with  or  statement  from  the  Regulatory  Authority  in  such  country  or  jurisdiction,  or  (ii)  other
guidance or minutes issued by the Regulatory Authority in such country or jurisdiction, for such
study.

[***].

1.83
“Phase 3 Study” means a Clinical Study of a 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  Product  is  safe  and  efficacious  for  its  intended  use  and  (ii)  is  pivotal  to
support  Marketing  Approval  for  such  Product;  or  (b)  that  meets  the  definition  in  21  C.F.R.
§312.21(c) or any of its foreign equivalents.  

“Plamotamab” means (a) Plamotamab (XmAb13676), which is a tumor-targeted antibody
1.84
that contains both a CD20 Binding Domain and a CD3 Binding Domain having the sequence set
forth  on  Schedule  1.84  (“Primary  Plamotamab”);  (b)  any  other  Antibodies  claimed  in
US9,850,320; or (c) any Plamotamab Variant.  

[***] = 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.

14

“Plamotamab  Product”  means  any  pharmaceutical  product  in  any  form  containing

1.85
Plamotamab as an active ingredient, in any dosage form, formulation or method of delivery.  

1.86

“Plamotamab Variant” means [***].  

1.87

“PPACA” means the U.S. Patient Protection and Affordable Care Act.

1.88

“Pre-Approved Study” means each of the studies described on Exhibit 1.88.

1.89
requires.

“Product”  means  a  Licensed  CD28  Product  or  a  Plamotamab  Product,  as  the  context

1.90
“Regulatory  Authority”  means  any  federal,  national,  multinational,  state,  provincial  or
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.

1.91
“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.

1.92

[***].

“Research” means scientific investigation and non-clinical activities to discover, identify,

1.93
characterize and optimize antibodies, but excluding any CMC Development 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.

15

for optimizing antibodies that have been discovered, identified and characterized and any activities
specific to optimizing such antibodies in Manufacturing.  

1.94

“Research B-Cell Antigen” means [***].  

1.95
epitope of a Research B-Cell Antigen.

“Research B-Cell Antigen Binding Domain” means a Binding Domain which binds any

1.96
“Solely  CD28/Plamotamab  Combination  Product”  means  a  CD28/Plamotamab
Combination  Product  (including  any  Combination  Copack)  that  contains  a  Licensed  CD28
Antibody and Plamotamab as its only API components.

1.97

“Specified Xencor Know-How” means [***].

“Target  B-Cell  Antigen  Binding  Domain”  means  a  Binding  Domain  which  binds  any

1.98
epitope of a Target B-Cell Antigen.

1.99
assessments or fees of any nature (including any interest thereon).

“Tax”  or  “Taxes”  means  any  present  or  future  taxes,  levies,  imposts,  duties,  charges,

1.100

“Territory” means worldwide.

1.101

“Third Party” means any Person other than a Party or any of its Affiliates.

1.102

“U.S.” means the United States of America.  

1.103
“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  [***]  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
1.103.  

1.104

“Variant” means [***].    

1.105

“Variant Binding Domain” means [***].

1.106
“Xencor Binding Domain” means (a) any Xencor proprietary CD28 Binding Domain or
Target  B-Cell  Antigen  Binding  Domain  used  by  Xencor  for  incorporation  into  Licensed  CD28
Antibodies, or (b) [***].

[***] = 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.

16

1.107
and Xencor Patents.  

“Xencor  Intellectual  Property”  means,  collectively,  the  Xencor  Research  Know-How

1.108
“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
CD28 Antibody or Licensed CD28 Product, but excluding [***].  

“Xencor  Plamotamab  Intellectual  Property”  means,  collectively, 

1.109
Plamotamab Know-How and Xencor Plamotamab Patents.  

the  Xencor

“Xencor  Plamotamab  Know-How”  means  all  Know-How  Controlled  by  Xencor  or  its
1.110
Affiliates as of the Effective Date or at any time during the Term that is reasonably necessary to
Exploit [***] Plamotamab or a Plamotamab Product, but excluding [***] .  

“Xencor Plamotamab Patents” means all Patents Controlled by Xencor or its Affiliates
1.111
as of the Effective Date or at any time during the Term that are reasonably necessary to Exploit
[***] Plamotamab or a Plamotamab Product, but excluding [***].  

1.112
“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

1.113
Know-How and Xencor Research Patents.

1.114

“Xencor Research Know-How” means:

(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 CD28 Antibody or Licensed CD28 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.  

1.115

“Xencor Research Patents” means [***].

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.

1.116 Additional  Definitions.    Each  of  the  following  definitions  is  set  forth  in  the  Section  of
this Agreement indicated below:  

Defined Term
[***] Notice Period
1974 Convention
Acquired Competing Product
Acquirer Competing Product
Acquirer Intellectual Property
Acquiring Party
Adjusted Combination Net Sales Amount
Agreement
Alliance Manager
Alternative Plamotamab Formulation
Anti-Corruption Laws
Antigen Selection
Antigen Selection Date
Antigen Selection Milestone Events
Antigen Selection Outside Date
API
Applied Janssen Technology
Backup
Bankruptcy Code
B-Cell Antigen Variant Specific Patent
Beneficial Owner
Beneficial Ownership
Biosimilar Application
Bispecific Competing Product
BLA
Breaching Party
Business Combination
Candidate Selection
Candidate Selection Date
Category A Net Sales
Category A Sales Milestone Event
Category A Sales Milestone Payment
Category B Net Sales
Category B Sales Milestone Event
Category B Sales Milestone Payment
CD28 Co-Detailing Option

18

Section
3.7.2
16.5
8.4.6
8.4.5.1
9.9.1
8.4.6
7.4.2.5
the Introduction
2.7
5.3.3
11.9.1(a)
3.7.3
3.7.3
7.2.4.2
3.7.2
1.73
13.5.2.1(a)
7.2.1
13.4.2
7.4.2.1(b)(ii)
1.16(e)
1.16(e)
9.4.4
8.4.1.1
1.36
13.2.1
1.16(c)
3.7.3
3.7.3
7.4.1.1(a)
7.3.1
7.3.1
7.4.1.1(b)
7.3.2
7.3.2
6.1

[***] = 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
6.1
CD28 Co-Funding Option
6.2.2
CD28 Co-Funding Option Exercise Date
6.2.4
CD28 Co-Funding Opt-Out
6.2.4
CD28 Co-Funding Opt-Out Effective Date
6.2.4
CD28 Co-Funding Opt-Out Notice
6.2.4(e)
CD28 Co-Funding Wind-down Period
7.4.2.5
CD28 Component
6.2.3.2(b)(ii)
CD28 Development Budget
6.2.3.2(a)
CD28 Development Plan
6.2.3.1(h)
CD28 Included Medical Affairs Studies Costs Limit
7.2.1
CD28 Milestone Event
7.2.1
CD28 Milestone Payment
7.4.2.1(a)
CD28 Royalty Term
7.4.2.1(b)(i)
CD28 Royalty-Bearing Patent
7.4.2.5
CD28 Unit Price
CD28/Plamotamab Combination Royalty Term
7.4.2.2(a)
CD28/Plamotamab Combination Royalty-Bearing Patent 7.4.2.2(a)
7.4.2.2(a)
CD28/Plamotamab Combination Sales
1.4
CDR
12.3.2
Claim Basis
13.5.2.6
Clinical Reverted Product
1.31(b)
CMC Development Activities
2.4.2
Co-Chair
6.3.3.5
Co-Detailing Agreement
6.3.1.2
Co-Detailing Data Package
6.3.1.3
Co-Detailing Data Package Delivery Date
6.3.2
Co-Detailing Option Exercise Date
6.3.3.4
Co-Detailing Plan
1.18
Combination Copack
2.5.2
Committee Matters
8.4.1.2
Competing Product
[***]
[***]
1.73
Component Allocation Notice
10.1.2
Confidential Information
14.2.1
Contemplated Transactions
6.2.3.4(d)(iii)
Cost Report

19

[***] = 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
Cost Variances
CPR Mediation Procedure
CPR Rules
Create Act
Cure Period
Data Package
Data Package Delivery Date
Derived Competing Product
Detail
Detailing
Development Decision Milestone Event
Development Decision Milestone Payment
Development FTE
Development FTE Costs
Development FTE Rate
Development Reconciliation Procedures
Disclosing Party
Dispute
Effective Royalty Rate
Execution Date
Executive Officers
Existing Xencor Intellectual Property
Expert
Expert Panel
First CD28/Plamotamab Marketing Approval
First CD28 Product Marketing Approval
First Exclusivity Period
First Milestone Product
Force Majeure
Hatch-Waxman Act
Included Medical Affairs Studies
Included Medical Affairs Studies Costs
Incompletion Notice
Incumbent Board
Indemnification Claim
Indemnitee
Indemnitor
Independent Plamotamab/Tafa Study

20

Section
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
7.2.2
7.2.2
6.2.3.1(b)
6.2.3.1(c)
6.2.3.1(d)
6.2.3.4(d)(ii)
10.1.1
15.1
7.4.3.4(b)
the Introduction
2.5.1.3
11.5.2
2.5.1.5(a)
2.5.1.5(a)
6.4.1.4(a)
6.4.2.2(a)
8.4.1.4
7.2.1
16.14
1.91
6.2.3.1(e)
6.2.3.1(f)
3.7
1.16(b)
12.3.1
12.3.2
12.3.2
5.1.3.5

[***] = 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.

Section

Defined Term
Independent Plamotamab/Tafa Study Opt-In Payment 5.1.3.5(f)
5.1.3.5(i)
Independent Plamotamab/Tafa Study Safety Data
9.4.2.1
Infringement Action
9.8
Infringement Claim
5.1.1.2(a)
Initial Development Activities
13.4.1
Insolvency Event
9.7.1
Invalidity Claim
9.2.1
Inventions
the Introduction
Janssen
8.1.4
Janssen Assigned Inventions
7.4.2.1(b)(iv)
Janssen B-Cell Antigen Variant
7.4.2.1(b)(iii)
Janssen B-Cell Antigen Variant Binding Domain
12.2
Janssen Indemnitees
2.2.1
JDC
2.3
JFC
5.3.1
JMT
13.5.2.14
Joint CD28 Patents
[***]
[***]
9.2.2.3
Joint Inventions
9.3.3.3(a)
Joint Patent Costs
9.2.2.3
Joint Patents
13.5.2.15
Joint Plamotamab Patents
[***]
[***]
[***]
[***]
2.1.1
JRC
10.6
JRD
12.1
Losses
1.36
MAA
6.2.3.1(a)
Manufacturing Cost of Clinical Supply
3.8
Materials
7.4.2.1
Milestone Event
7.4.2.1
Milestone Payment
6.4.1.4(a)
Minimal Development Activity
1.80
MTD
5.1.2.1(b)(ii)
No Plamotamab Development Election
13.2.1
Non-breaching Party

21

[***] = 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
6.4.2
Notice of 6.4.1 Application
6.4.1.4(a)
Notice of 6.4.2 Application
[***]
[***]
[***]
[***]
5.1.2.1(a)(iii)
Notice of Development Election Without CD28
Notice of Plamotamab POC Study After Successful Exploration
5.1.2.1(a)(iii)
Notice of Plamotamab POC Study After Unsuccessful Exploration 5.1.2.1(a)(iii)
Novartis
Number of CD28 Units
Number of Plamotamab Units
Other Costs Not Included in Standard
Other Plamotamab Product Royalty Term
Other Plamotamab Product Royalty-Bearing Patent
Out-of-Pocket Expenses
Outstanding Common Stock
Outstanding Voting Securities
Party
Patent Representative
PDE
[***]
Phase 1 Exploration Study
PHSA
Plamotamab Antibody Patents
Plamotamab Co-Detailing Option
Plamotamab Component
Plamotamab Cure Period
Plamotamab Development Budget
Plamotamab Development Election
Plamotamab Development Notice
Plamotamab Development Plan
Plamotamab Included Medical Affairs Studies Costs Limit
Plamotamab Milestone Event
Plamotamab Milestone Payment
Plamotamab POC Study
Plamotamab Safety Concerns

8.4.8
7.4.2.5
7.4.2.5
6.2.3.1(a)(iii)
7.4.2.2(b)
7.4.2.2(b)
6.2.3.1(g)
1.16(a)
1.16(a)
the Introduction
9.1
6.3.3.5(b)
[***]
5.1.1.2(a)(i)
1.91
9.3.1.2
5.2.3
7.4.2.5
13.3.2.2(a)
5.1.1.2(c)
5.1.2.1(b)(ii)
5.1.2.1(b)(ii)
5.1.1.1
6.2.3.1(h)
7.2.3
7.2.3
5.1.1.2(a)(ii)
5.1.3.4

22

[***] = 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
Section
Plamotamab/Tafa Combination Regimen
5.1.3.1
POC Data Package
6.2.1.2
POC Data Package Delivery Date
6.2.1.3
Post-POC Decision Notice
5.1.2.1(b)(ii)
Pre-POC Decision Development Activity
5.1.2.2
Primary Antibody
1.64
Primary Plamotamab
1.84
Primary Plamotamab Products
11.6.1
Product Infringement
9.4.1
Product Marks
9.10
Proof-of-Concept
6.2.1.1
Proof-of-Concept Date
6.2.1.1
Proposal Delivery Date
5.1.3.3
Proposal Review Period
5.1.3.4
Proposed Plamotamab/Tafa Study
5.1.3.1
Prosecute
9.3.1.2
Prosecution
9.3.1.2
Protocol
15.4.6
Public Official
11.9.4
Purple Book
9.6
Quarterly Net Sales
7.4.3.4(a)
Receiving Party
10.1.1
Regulatory Documentation and Filings
13.5.2.4
Remaining Net Sales Amount
7.4.2.5
Research Clone Banking
13.5.2.1(b)
Research Competing Product
8.4.1.5
Research License
8.1.1.1
Research Plan
3.2.1
Research Program
3.1
Research Program Results
10.1.4
Research Program Term
3.1
Reversion Royalty Rate
13.5.2.3
Reverted CD28 Antibody
13.5.2.1(c)
Reverted CD28 Derivative
13.5.2.1(d)
Reverted CD28 Product
13.5.2.1(f)
Reverted CD28 Product Derivative
13.5.2.1(g)
13.5.2.1(e)
Reverted CD28 Variant
Reverted CD28/Plamotamab Combination Product 13.5.2.1(h)

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.

Section
13.5.2.1(i)
13.5.2.1(j)
7.4.2.3
7.4.2.3
7.4.2.2(a)
7.3.3.2
7.3.3.1
8.4.1.6
8.4.1.7
[***]
3.7.5
3.7.5
3.7.5
6.2.3.1(h)
1.16(a)
6.2.3.1(a)(i)
16.3
16.3
1.36
5.1.1.2(a)(iii)
3.2.2
3.2.2

Defined Term
Reverted Plamotamab Product
Reverted Product
Royalty Term
Royalty-Bearing Patent
Royalty-Bearing Plamotamab Formulation Patent
Sales Milestone Event
Sales Milestone Payment
Scale-Up
Second Exclusivity Period
[***]
Selected B-Cell Antigen
Selected B-Cell Antigen Binding Domain
Selected CD28 Antibody
Shared Development Costs
Specified Person
Standard Cost of Goods Manufactured
Subcontract
Subcontractor
Supplemental Application
Tafa/len Safety Run-in
Target B-Cell Antigens
Target Criteria
Target Phase 1 Exploration Study Completion Date 5.1.2.1(a)
Term
Third Party Compensation
Third Party Competitive Product
Third Party License
Total CD28/Plamotamab Net Sales
Unadjusted Quarterly Royalties
Xencor
Xencor B-Cell Antigen x CD28 Patents
Xencor CD28 Inventions
[***]
Xencor Indemnitees
[***]
[***]

13.1
1.25
9.4.1
7.4.3.2(a)
7.4.2.5
7.4.3.4(c)
the Introduction
9.3.1.2
11.5.2
[***]
12.1
[***]
[***]

[***] = 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.

24

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 [***] 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  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 the Effective Date.  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 notice to the other Party of such change.  If Xencor exercises the CD28 Co-Funding Option
in accordance with Section 6.2, the JDC will be disbanded upon the later of: (a) completion of the
CD28  Development  Plan  activities;  and  (b)  termination  of  this  Agreement  with  respect  to
Plamotamab pursuant to Section 13.3.2.  If Xencor does not exercise the CD28 Co-Funding Option
in accordance with Section 6.2, the JDC will be disbanded upon the later of: (a) termination of this
Agreement with respect to Plamotamab pursuant to Section 13.3.2; and (b) such date when Xencor
can no longer exercise the CD28 Co-Funding Option pursuant to Section 6.2.

2.2.2

JDC Responsibilities.  

2.2.2.1

With  respect 

to  Licensed  CD28  Products  (other 

than  any

CD28/Plamotamab Combination):

JDC will serve as a forum for and facilitate communications between the Parties with respect to

(a)

Prior  to  Xencor’s  exercise  of  the  CD28  Co-Funding  Option:  (i)  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.

25

the  reports  provided  by  Janssen  under  Section  4.4.2.1;  and  (ii)  the  JDC  will  have  no  decision-
making authority with respect to Licensed CD28 Products.

(b)

If  Xencor  exercises  the  CD28  Co-Funding  Option  in  accordance
with Section 6.2, the JDC will: (i) serve as a forum for and facilitate communications between the
Parties  with  respect  to  the  activities  conducted  under  the  CD28  Development  Plan  and  CMC
Development Activities for the Licensed CD28 Products; and (ii) discuss and approve amendments
to the CD28 Development Plan in accordance with Section 6.2.3.

With 

2.2.2.2

respect 

any
to 
CD28/Plamotamab  Combination),  the  JDC  will:  (a)  serve  as  a  forum  for  and  facilitate
communications between the Parties with respect to the activities conducted under the Plamotamab
Development Plan and CMC Development Activities for the Plamotamab Products; and (b) discuss
and  approve  amendments  to  the  Plamotamab  Development  Plan  in  accordance  with  Section
5.1.1.3.

Plamotamab 

(including 

Products 

2.2.2.3

The  JDC  will  also  perform  the  other  functions  that  are  expressly

delegated to the JDC in this Agreement.  

Joint  Finance  Committee.    The  Parties  will  establish  a  joint  finance  committee  (the
2.3
“JFC”) promptly after the Effective Date.  The JFC will: (i) coordinate and conduct the budgeting,
accounting, reporting, reconciliation and other financial activities with respect to the Development
Budgets  and  Shared  Development  Costs  to  the  extent  provided  in  Section  5.1.4  and  Section
6.2.3.4; (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 5.1.4 and Section 6.2.3.4;  and
(iii)  perform  the  other  functions  with  respect  to  the  Development  Budgets  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.  If Xencor
exercises  the  CD28  Co-Funding  Option  in  accordance  with  Section  6.2.3.4,  the  JFC  will  be
disbanded  upon  the  later  of  (a)  completion  of  the  CD28  Development  Plan  activities  and
reimbursement  of  all  Shared  Development  Costs  for  the  Licensed  CD28  Products;  and  (b)
completion  of  the  Plamotamab  Development  Plan  activities  and  reimbursement  of  all  Shared
Development  Costs  for  the  Plamotamab  Products.    If  Xencor  does  not  exercise  the  CD28  Co-
Funding Option in accordance with Section 6.2.3.4, the JFC will be disbanded upon completion of
the Plamotamab Development Plan activities and reimbursement of all Shared Development Costs
for the Plamotamab Products.

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

[***] = 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

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 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
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 [***] after receipt of such comments.

2.5

Decision-Making.

2.5.1 Committee Actions.

2.5.1.1

    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.

2.5.1.2

With respect to the JRC: (i) if the Committee Matter is a proposal to
amend the Research Plan to include any Target B-Cell Antigen in the Research Plan prior to the
[***] anniversary of the Effective Date or to remove any Target B-Cell Antigen from the Research
Plan  at  any  time,  Janssen  will  have  the  final  decision  making  authority;  and  (ii)  for  all  other
Committee Matters of the JRC, neither Party will have final decision making authority 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

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.

2.5.1.3

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:  (a)  Xencor  shall  have  the  final  decision
making  authority  with  respect  to  Development  activities  to  the  extent  relating  to  the  Tafa/len
Safety  Run-in;  and  (b)  Janssen  will  have  the  final  decision  making  authority  with  respect  to  all
other  Committee  Matters.    Notwithstanding  the  foregoing,  the  JDC  (including  through  Janssen’s
final  decision  pursuant  to  this  Section  2.5.1.3)  cannot  take  any  of  the  following  actions  without
Xencor’s written consent:

Exploration Study;

(a)

establish  the  Development  activities  relating  to  the  Phase  1

amend the Plamotamab Development Plan (including any timetables
therein)  with  respect  to  any  of  the  Initial  Development  Activities  or  [***]  to  include  any
Development activities other than the Initial Development Activities;

(b)

(c)

materially  amend  or  cease  the  conduct  of  any  Independent
Plamotamab/Tafa  Study  (unless  both:  (i)  it  is  added  to  the  Plamotamab  Development  Plan  in
accordance with Section 5.1.3.5(f); and (ii) the amount of the Independent Plamotamab/Tafa Study
Opt-in Payment paid by Janssen in connection with such Independent Plamotamab/Tafa Study is
equal to or greater than [***]) other than for Plamotamab Safety Concerns; or  

undertake any additional activities.

(d)

amend  the  Plamotamab  Development  Plan  to  require  Xencor  to

2.5.1.4

With respect to the JFC, either Party may refer a Committee Matter
of  the  JFC  (other  than  [***])  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.

28

2.5.1.5

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.

[***] = 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

2.6
Subcommittees.  From  time  to  time,  each  Committee  may  establish  subcommittees  to
perform  particular  tasks  and  oversee  particular  projects  or  activities  within  the  Committee’s
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.

2.7
Alliance  Managers.  Promptly  after  the  Effective  Date,  each  Party  will  appoint  an
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 PROGRAM FOR LICENSED CD28 ANTIBODIES AND LICENSED CD28
PRODUCTS

3.1
Overview.  The Parties will collaborate to conduct a program of research and development
of Licensed CD28 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 Research Program will include any Research B-Cell Antigens that are set
forth in the initial Research Plan or added by amending the Research Plan after the Effective Date
in accordance with Section 3.2 (subject to Janssen’s final decision-making authority under Section
2.5.1.3).    The  objective  of  the  Research  Program  is  to  Research  one  or  more  Licensed  CD28
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 [***] anniversary of the Effective Date
and (b) the date of the [***] Antigen Selection in accordance with Section 3.7 is referred to as the
“Research Program Term.”  If the date of the [***] Antigen Selection does not occur before the
[***]  anniversary  of  the  Effective  Date  and,  as  of  the  [***]  anniversary  of  the  Effective  Date,
either (x) a Data Package for a Target B-Cell Antigen has been delivered, but the Antigen Selection
Date or Antigen Selection Outside Date has not yet occurred, or (y) a Data Package for a Target B-
Cell Antigen has not been delivered, then the Research Program Term will be extended until the
Antigen Selection Date or Antigen Selection Outside Date occurs for the last of all such Target B-
Cell Antigens.

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.

[***] = 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

3.2.2 Contents. The initial Research Plan includes, and any amended Research Plan will
include, the following  elements:  (a)  the  Research  B-Cell  Antigens  that  will  be the subject of the
Research,  as  determined  by  the  JRC  (subject  to  Janssen’s  final  decision-making  authority  under
Section 2.5.1.3) (the “Target B-Cell Antigens”); (b) descriptions of the key activities to Research
Licensed CD28 Antibodies; (c) a target timeline for completing the activities; (d) Janssen’s target
criteria for Licensed CD28 Antibodies (the “Target Criteria”); and (e) 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.

Conduct of Research Program Activities.  Each Party will be responsible for conducting
3.3
the activities assigned to it in the Research Plan.  Each Party will carry out the activities assigned
to  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.  For each Target B-Cell Antigen, Janssen will designate
and  provide  [***]  Target  B-Cell  Antigen  Binding  Domain  to  Xencor  for  the  purpose  of
Researching  Licensed  CD28  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.  For each Target B-Cell Antigen, Xencor will designate
and  use  in  the  Research  Program  its  proprietary  CD28  Binding  Domains  (including  the  Binding
Domains set forth on Schedule 11.5.2) and, to the extent possessed and Controlled by Xencor at
the  time  such  antigen  becomes  a  Target  B-Cell  Antigen,  [***]  Target  B-Cell  Antigen  Binding
Domains  for  the  purpose  of  Researching  Licensed  CD28  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  CD28  Antibodies  and  Licensed  CD28  Products  under  this
Agreement.  For clarity, Xencor retains the right to use any Xencor Binding Domain in any

[***] = 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

product that is not a Licensed CD28 Antibody or Licensed CD28 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  CD28  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  CD28  Antibody  or  Licensed
CD28 Product during or after the Term.

Research Program Costs.  Each Party will bear all costs incurred by such Party and its

3.5
Affiliates in conducting the Research Program activities allocated to it under the Research Plan.

3.6

Records; Reports.

3.6.1 Records.  Each Party 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  the  other  Party,  each  Party  will  provide  the  other  Party  with  a  copy  of  any  such
records to the extent specific to any Primary Antibody.

3.6.2 Reports and Data Packages.  Each Party will provide periodic updates and reports
regarding the Research Program activities and results to the other Party through the JRC, including
summaries of the data and information generated and, if reasonably requested by the other Party,
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 CD28 Antibody.

3.7

Candidate Selection; Antigen Selection.

3.7.1 Promptly after completing all Research Program activities with respect to a Target
B-Cell Antigen, 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 Primary Antibodies
binding  to  such  Target  B-Cell  Antigen  (the  “Data  Package”).    If,  however,  Xencor  does  not
reasonably expect the Research Program activities with respect to a Target B-Cell Antigen to be
completed  prior  to  the  second  anniversary  of  the  Effective  Date,  then  Xencor  will  prepare  and
deliver a data package for such Target B-Cell Antigen on or before the second anniversary of the
Effective  Date  that  includes  all  available  data  and  results  for  the  applicable  Research  Program
activities  for  such  Target  B-Cell  Antigen  (also  a  “Data  Package”).    If  Janssen  notifies  Xencor
within  [***]  following  receipt  that  the  Data  Package  is  not  sufficient  to  determine  whether  to
further Develop the applicable Primary Antibodies (“Incompletion Notice”), Xencor will provide
the missing data and results as soon as possible.  The date on

[***] = 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

 
which  Janssen  is  in  receipt  of  a  complete  Data  Package  is  deemed  to  be  the  “Data  Package
Delivery Date” for such Target B-Cell Antigen.  The Data Package Delivery Date for a Target B-
Cell  Antigen  shall  be  deemed  the  date  on  which  Xencor  first  provided  the  Data  Package  unless
Janssen provides Incompletion Notice within [***] after receipt of a Data Package.

3.7.2 Within [***] after a Data Package Delivery Date, Janssen will decide whether any
of the Primary Antibodies that are the subject of the Data Package should be further Developed.
  Janssen  will  notify  Xencor  of  its  decision  within  the  [***]  period.    If  Janssen  fails  to  provide
notice of its decision within such [***] period with respect to a Data Package, Xencor may notify
Janssen of its failure and Janssen will have [***] after such notice from Xencor to notify Xencor of
its  decision  (the  “[***]  Notice  Period”).    Janssen’s  failure  to  respond  within  such  [***]  period
shall be deemed notice not to further Develop the Primary Antibodies to which such Data Package
relates.  The “Antigen Selection Outside Date” for a Target B-Cell Antigen shall mean the earlier
of:  (a)  the  day  after  the  last  day  of  the  [***]  Notice  Period  applicable  to  such  Target  B-Cell
Antigen; and (b) the [***] after the [***] anniversary of the Effective Date.  For clarity, if no Data
Package  is  delivered  for  a  Target  B-Cell  Antigen  on  or  before  the  [***]  anniversary  of  the
Effective Date, the Antigen Selection Outside Date will be the [***] after the [***] anniversary of
the Effective Date.

3.7.3

If Janssen decides that at least one of such Primary Antibodies that is the subject of
a Data Package for a Target B-Cell Antigen should be further Developed, the notice will identify
which  Primary  Antibody  or  Primary  Antibodies  binding  to  such  Target  B-Cell  Antigen  will  be
further  Developed  in  accordance  with  the  terms  of  this  Agreement.    Janssen  may  also  notify
Xencor  at  any  time  during  the  Research  Program  Term  that  it  will  further  develop  a  Primary
Antibody, even if a Data Package for such Primary Antibody has not yet been delivered.  Any of
the foregoing decisions in this Section 3.7.3 to further Develop a Primary Antibody is referred to
as “Candidate Selection,”  and  the  date  on  which  Janssen  gives  such  notice  is  referred  to  as  the
“Candidate Selection Date” for such Primary Antibody.  “Antigen Selection” for a Target B-Cell
Antigen means the Candidate Selection for the first Primary Antibody that binds to such Target B-
Cell Antigen.  “Antigen Selection Date” for a Target B-Cell Antigen means the date of Antigen
Selection for such Target B-Cell Antigen.  For clarity, Candidate Selection for a Primary Antibody
that binds to multiple Target B-Cell Antigens for which Antigen Selection has not already occurred
shall constitute a distinct Antigen Selection for each of such Target B-Cell Antigens.  For example,
if  the  first  Primary  Antibody  for  which  Candidate  Selection  occurs  includes  a  CD28  Binding
Domain, a CD20 Binding Domain and a Binding Domain which binds an epitope of CD79B, then
Antigen  Selection  will  occur  for  both  CD20  and  CD79B.    Notwithstanding  anything  to  the
contrary  in  this  Agreement,  in  accordance  with  Section  3.7.5,  Janssen  cannot  make  a  Candidate
Selection that would cause more than four (4) total Antigen Selections to occur and any attempt to
do  so  shall  not  be  deemed  a  Candidate  Selection  or  Antigen  Selection  for  any  purpose  of  this
Agreement (i.e., there can be no more than four (4) Selected B-Cell Antigens).  

3.7.4

If (a) the Data Package Delivery Date has occurred for each Target B-Cell Antigen

that is the subject of Research activities in the Research Plan and (b) for each Data

[***] = 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

Package that has been delivered, Janssen has notified Xencor under Section 3.7.2 that none of the
Primary  Antibodies  that  are  the  subject  of  the  Data  Package  should  be  further  Developed,
Janssen’s  notice  under  Section  3.7.2  for  the  last  of  such  Data  Packages  will  be  deemed  to  be  a
notice  to  terminate  this  Agreement  without  cause  in  accordance  with  Section  13.3.3.    If  (i)  the
Antigen  Selection  Outside  Date  for  each  Target  B-Cell  Antigen  that  is  the  subject  of  Research
activities in the Research Plan has occurred and (ii) Janssen has not notified Xencor of Candidate
Selection  for  any  Primary  Antibody,  then  Xencor  may  terminate  this  Agreement  solely  with
respect to the Licensed CD28 Antibodies and Licensed CD28 Products by giving [***] notice to
Janssen after the Antigen Selection Outside Date that occurs last.

3.7.5 Upon  Candidate  Selection  for  a  Primary  Antibody:  (a)  such  antibody  will  be
deemed  a  “Selected  CD28  Antibody;”  (b)  any  Target  B-Cell  Antigen  to  which  such  antibody
binds will be deemed  a  “Selected B-Cell Antigen;”  and  (c)  a  Binding  Domain  which  binds  any
epitope  of  a  Selected  B-Cell  Antigen  will  be  deemed  a  “Selected  B-Cell  Antigen  Binding
Domain.”  The number of Selected B-Cell Antigens shall not exceed [***].  There will be no limit
on the number of Selected CD28 Antibodies for each Selected B-Cell Antigen.  

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.

ARTICLE 4
DEVELOPMENT, MANUFACTURE AND COMMERCIALIZATION OF LICENSED
CD28 ANTIBODIES AND LICENSED CD28 PRODUCTS

4.1
General – Licensed CD28 Products.    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 CD28 Antibodies and Licensed CD28 Products in
the  Territory  at  its  sole  cost  and  expense,  except  that  (i)  Xencor  will  Research  Licensed  CD28
Antibodies  during  the  Research  Program  Term  in  accordance  with  ARTICLE  3  and  (ii)  the
Development, Manufacture, Commercialization and other Exploitation of any CD28/Plamotamab
Combination will be subject to the terms set forth in ARTICLE 5.  Without limiting the foregoing:

Antibodies generated by Xencor during the Research Program Term will include all activities

(a)

Development  conducted  by  Janssen  with  respect  to  Licensed  CD28

[***] = 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

 
following  Candidate  Selection,  including  IND-enabling  activities.    Janssen’s  authority  over
Development  of  the  Licensed  CD28  Antibodies  includes  the  right  to  conduct  Development  of
Combination  Regimens  that  include  the  Licensed  CD28  Products  and  other  Janssen  products  or
Third  Party  products  (including  CD20  products)  in  Janssen’s  sole  discretion,  even  if  Janssen  is
Developing the CD28/Plamotamab Combination under this Agreement.  

filings for the Licensed CD28 Products, including INDs/CTAs and Drug Approval Applications.  

(b)

Janssen will have the sole and exclusive right to hold all regulatory

Janssen  will  have  sole  decision-making  authority  over  global
Commercialization matters for the Licensed CD28 Products, including pricing and reimbursement.

(c)

4.2
Xencor  Assistance  for  Licensed  CD28  Products.   After  Candidate  Selection  and  until
the  [***]  anniversary  of  the  last  day  of  the  Research  Program  Term,  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  CD28  Antibodies  and
Licensed CD28 Products.  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

4.4

[Reserved].

Conduct of Licensed CD28 Product Activities.

4.4.1 Standards of Conduct for Licensed CD28 Product Activities; Records.  Janssen will
conduct  all  Development  of  Licensed  CD28  Antibodies  and  Licensed  CD28  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 intellectual property protection purposes.  Janssen will conduct all
Commercialization  activities  for  Licensed  CD28  Products  under  this  Agreement  in  compliance
with all applicable Laws.

4.4.2 Reports for Licensed CD28 Product Activities.

4.4.2.1

Janssen  will  provide  Xencor  with  periodic 

its
Development  activities  with  respect  to  the  Licensed  CD28  Antibodies  and  Licensed  CD28
Products  for  so  long  as  Janssen  is  conducting  Development  activities.    Such  reports  will  be
provided  on  a  [***]  basis  within  [***]  after  [***].    If  Xencor  exercises  the  CD28  Co-Funding
Option  in  accordance  with  Section  6.2,  Janssen  will  continue  to  provide  [***]  reports  in
accordance with Section 6.2.3.3(c).  Otherwise, Janssen will provide such reports on [***] basis

reports  on 

[***] = 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.

35

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.

4.4.2.2

On an [***] basis within [***] after the completion of each Calendar
Year after the First Commercial Sale of any Licensed CD28 Product, Janssen will provide Xencor
a high-level summary of its Commercialization launch status and performance for Licensed CD28
Products  since  the  previous  summary  and  a  high-level  summary  of  Janssen’s  projected
Commercialization activities for the subsequent Calendar Year.

ARTICLE 5
DEVELOPMENT, MANUFACTURE AND COMMERCIALIZATION OF PLAMOTAMAB
AND PLAMOTAMAB PRODUCTS

5.1

Development of Plamotamab Products.  

5.1.1 Plamotamab Development Plan and Budget.  

5.1.1.1

General – Plamotamab Development Plan.  Following the Effective
Date, the Parties will conduct Development of Plamotamab and Plamotamab Products (including
any  CD28/Plamotamab  Combinations)  in  accordance  with  the  Plamotamab  Development  Plan.
  “Plamotamab  Development  Plan”  means  the  written  plan  for  the  Parties’  Development  of
Plamotamab Products (including any CD28/Plamotamab Combinations) in the Territory containing
the  information  set  forth  in  Section  5.1.1.2  below,  as  it  may  be  amended  from  time  to  time  in
accordance with the terms of Section 5.1.1.3.  The Plamotamab Development Plan will include the
Plamotamab Development Budget, as described in Section 5.1.1.2(c) below.

5.1.1.2

Plamotamab Development Plan Contents.

(a)

Initial  Plamotamab  Development  Plan.  The  initial  Plamotamab
Development Plan will be prepared by the JDC following the Effective Date upon the request of
either  Party  and  shall  solely  consist  of  the  following  Development  activities  unless  the  plan  is
amended by the JDC in accordance with Section 5.1.1.3 (or by the Executive Officers or by mutual
agreement of the Parties in accordance with Section 2.5.1.3(b)) to include additional Development
activities before a [***] (the “Initial Development Activities”):  

Phase 1 exploration and identification of better tolerated and
efficacious dose/schedule, including finalizing subcutaneous formulation and introduction in clinic
(the “Phase 1 Exploration Study”);

(i)

a proof-of-concept study that identifies a safe and efficacious
dose  for  combination  of  Plamotamab  and  a  Licensed  CD28  Product  (the  “Plamotamab  POC
Study”);

(ii)

[***] = 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.

36

(iii)

the  ongoing  tafasitamab/lenalidomide  study  safety  run-in
portion  of  a  Phase  2  Randomized,  Open-Label,  Multicenter  Study  to  Evaluate  the  Efficacy  and
Safety  of  XmAb®13676  (Plamotamab)  Combined  with  Tafasitamab  Plus  Lenalidomide  Versus
Tafasitamab  Plus  Lenalidomide  in  Subjects  with  Relapsed  or  Refractory  Diffuse  Large  B-Cell
Lymphoma (the “Tafa/len Safety Run-in”); and

Plamotamab Formulation, to the extent approved by the JDC under Section 5.3.3.

(iv)

the  CMC  Development  Activities  for  an  Alternative

estimates for the Initial Development Activities is attached as Exhibit 5.1.1.2.  

An  initial  Plamotamab  Development  Budget  with  non-binding  cost

Plamotamab Development Plan after Post-POC Decision.  If Janssen
elects to proceed with Development of a Plamotamab Product in accordance with Section 5.1.2.1
below, then, following such election:

(b)

Plamotamab Development Plan; and

(i)

Section  6.4.1.1  or  6.4.2.1,  as  applicable,  will  apply  to  the

The  Plamotamab  Development  Plan  will  also  describe
Included Medical Affairs Studies for the Plamotamab Products.  Each Plamotamab Development
Budget  will  include  an  amount  for  Included  Medical  Affairs  Studies  for  each  Calendar  Year
covered by such budget.

(ii)

(c)

Plamotamab  Development  Budget.  The  Plamotamab  Development
Plan  will  include  a  [***]  budget  for  Shared  Development  Costs  to  be  incurred  by  the  Parties  in
conducting  the  Development  activities  described  in  the  Plamotamab  Development  Plan  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 “Plamotamab Development
Budget”).  The [***] of each Plamotamab Development Budget will be binding on the Parties to
the extent provided in Section 6.2.3.4(e), and the [***] of such Plamotamab Development Budget
will  serve  as  non-binding  guidance  for  the  Parties.    For  clarity,  the  Plamotamab  Development
Budget  will  include  Shared  Development  Costs  for  any  CD28/Plamotamab  Combination,  if
applicable.  

5.1.1.3

Updates and Amendments to the Plamotamab Development Plan.  

The  Plamotamab  Development  Plan  (including  the  Plamotamab
Development Budget) may be updated and amended from time to time only with the approval of
the JDC (or in accordance with Section 2.5.1.3), as described below in this Section 5.1.1.3.

(a)

(b)

The  JDC  will  review  the  Plamotamab  Development  Plan  annually.
  Janssen  will  prepare,  and  submit  to  the  JDC  for  review,  an  updated  Plamotamab  Development
Plan  (excluding  the  Plamotamab  Development  Budget)  on  or  before  [***]  of  the  then-current
Calendar Year.  When Janssen is preparing the updated Plamotamab Development Plan, Janssen

[***] = 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

will  reasonably  consider  Xencor’s  input  into  the  Clinical  Study  design  and  key  Development
activities in the Plamotamab Development Plan.  Janssen will prepare, and submit to the JDC for
review,  an  updated  Plamotamab  Development  Budget  covering  each  of  the  next  [***]  Calendar
Years on or before [***] of the then-current Calendar Year.

such updates no later than [***] of each Calendar Year.

(c)

The JDC will use reasonable efforts to grant preliminary approval of

submitted to each Party for its internal budgeting process.

(d)

Promptly after the JDC’s preliminary approval, such updates will be

(e)

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 Plamotamab Development Plan.

Either  Party  may  submit  a  proposed  update  or  amendment  to  the
Plamotamab Development Plan 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.

(f)

(g)

If  the  JDC  approves  an  update  or  amendment  to  the  Plamotamab
Development  Plan  (including  any  corresponding  update  or  amendment  to  the  Plamotamab
Development  Budget), 
the  Plamotamab
Development  Budget)  will  be  deemed  to  be  amended  accordingly  on  the  date  of  such  approval.
 No update or amendment to the Plamotamab Development Plan will become effective unless and
until the JDC (or the Executive Officers, a Party or the Parties, as applicable, in accordance with
Section 2.5.1.3) approves a corresponding update or amendment to the Plamotamab Development
Budget.

the  Plamotamab  Development  Plan  (including 

5.1.2 Conduct of Plamotamab Development Activities.  

5.1.2.1

Conduct  of  Initial  Plamotamab  Development  Plan;  Post-POC
Decision.  Following the Effective Date, the Parties will conduct the Initial Development Activities
in accordance with this Section 5.1.2.1 and, if applicable, Section 5.3.  

(a)

Phase 1 Exploration Study.

(i)

Conduct  of  Phase  1  Exploration  Study.    Xencor  will  use
Diligent Efforts to conduct the Phase 1 Exploration Study and to complete the Phase 1 Exploration
Study by the date that is [***] after the [***] anniversary of the Effective Date (the “Target Phase
1 Exploration Study Completion Date”).  If the Phase 1 Exploration Study is not completed by
the  Target  Phase  1  Exploration  Study  Completion  Date,  Janssen  will  have  the  right  to  terminate
this  Agreement  solely  with  respect  to  Plamotamab  and  the  Plamotamab  Products  in  accordance
with Section 13.3.2.1.

[***] = 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.

38

(ii)

Decision  after  Completion  of  Phase  1  Exploration  Study.
  After  completion  of  the  Phase  1  Exploration  Study,  Janssen  will  determine,  in  its  reasonable
discretion,  whether  the  Phase  1  Exploration  Study  was  successful.    For  purposes  of  this  Section
and  other  relevant  provisions  of  the  Agreement,  early  termination  by  Xencor  of  the  Phase  1
Exploration Study before completion (e.g., for safety reasons) will be treated as “completion.”

If  Successful.    If  Janssen  determines  that  the
Phase 1 Exploration Study was successful, Janssen will then proceed to conduct the Plamotamab
POC Study according to the terms of Section 5.1.2.1(b).

(1)

(2)

  If  Janssen
determines  that  the  Phase  1  Exploration  Study  was  not  successful,  Janssen  will  then  decide
whether  to  either  (x)  terminate  this  Agreement  solely  with  respect  to  Plamotamab  and  the
Plamotamab  Products,  (y)  proceed  to  conduct  the  Plamotamab  POC  Study,  or  (z)  proceed  to
Develop a Plamotamab Product that is not a CD28/Plamotamab Combination.  Janssen shall decide
between  the  options  in  clauses  (x),  (y)  and  (z)  in  its  sole  discretion  but  it  must  choose  one.
 Following such determination:

Decision  If  Not  Successful. 

If  Janssen  decides  to  terminate  this
Agreement  solely  with  respect  to  Plamotamab  and  the  Plamotamab  Products,  notice  of  this
decision  will  be  deemed  to  be  notice  of  termination  of  this  Agreement  solely  with  respect  to
Plamotamab and the Plamotamab Products under Section 13.3.2.1.

i.

conduct the Plamotamab POC Study, then Section 5.1.2.1(b) will apply.

ii.

If  Janssen  decides 

to  proceed 

to

to
Develop  a  Plamotamab  Product  that  is  not  a  CD28/Plamotamab  Combination,  then  (A)  Section
6.4.2  will  apply  and  (B)  Janssen  will  thereafter  have  a  right  to  terminate  this  Agreement  solely
with respect to Plamotamab and the Plamotamab Products in accordance with Section 13.3.2.1.  

If  Janssen  decides 

to  proceed 

iii.

(iii)

Notice  after  Completion  of  Phase  1  Exploration  Study.
  Janssen  will  make  its  determination  under  Section  5.1.2.1(a)(ii)  and,  if  applicable,  its  decision
under  Section  5.1.2.1(a)(ii)(2)  within  [***]  after  completion  of  the  Phase  1  Exploration  Study.
 Janssen shall provide notice to Xencor of such determination and decision within such [***].  If
Janssen  does  not  notify  Xencor  of  such  determination  within  such  [***],  Xencor  may  notify
Janssen of its failure and Janssen will have [***] after such notice from Xencor to provide notice
of its determination.   If Janssen does not notify Xencor of such determination and decision within
such [***],  Janssen shall be deemed to have given notice of termination of this Agreement solely
with respect to Plamotamab and the Plamotamab Products in accordance with Section 13.3.2.1.  A
“Notice of Plamotamab POC Study After Successful Exploration” refers to a notice under this
Section  5.1.2.1(a)(iii)  that  the  Phase  1  Exploration  Study  was  successful.    A  “Notice  of
Plamotamab POC Study After Unsuccessful Exploration” refers to a notice under this Section
5.1.2.1(a)(iii) that (x) the Phase 1 Exploration Study was not successful and (y)

[***] = 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.

39

Janssen  has  decided  to  proceed  to  conduct  the  Plamotamab  POC  Study.    A  “Notice  of
Development  Election  Without  CD28”  refers  to  a  notice:  (A)  under  this  Section  5.1.2.1(a)(iii)
that (1) the Phase 1 Exploration Study was not successful and (2) Janssen has decided to proceed
to  Develop  a  Plamotamab  Product  that  is  not  a  CD28/Plamotamab  Combination;  or  (B)  that
Janssen has decided to proceed to Develop a Plamotamab Product that is not a CD28/Plamotamab
Combination in accordance with Section 5.1.2.1(a)(iv).  

(iv)

If Agreement no longer applies to Licensed CD28 Antibodies
and  Products  after  Completion  of  Phase  1  Exploration  Study.    If  this  Agreement  has  been
terminated solely with respect to the Licensed CD28 Antibodies and Licensed CD28 Products in
accordance  with  Section  3.7.4  before  the  Phase  1  Exploration  Study  is  completed,  then  Section
5.1.2.1(a)(ii)  and  Section  5.1.2.1(a)(iii)  will  not  apply.    Instead,  Janssen  will  decide  in  its  sole
discretion within [***] after completion of the Phase 1 Exploration Study either to (x) terminate
this Agreement solely with respect to Plamotamab and the Plamotamab Products or (y) proceed to
Develop a Plamotamab Product that is not a CD28/Plamotamab Combination (which shall also be
deemed a “Notice of Development Election Without CD28” for all purposes of this Agreement).  If
Janssen does not notify Xencor of such decision within such [***], Xencor may notify Janssen of
its  failure  and  Janssen  will  have  [***]  after  such  notice  from  Xencor  to  provide  notice  of  its
decision.      If  Janssen  does  not  notify  Xencor  of  such  decision  within  such  [***]  period  then
Janssen shall be deemed to have given notice of termination of this Agreement solely with respect
to Plamotamab and the Plamotamab Products in accordance with Section 13.3.2.1.  

If Janssen decides to terminate this Agreement
solely  with  respect  to  Plamotamab  and  the  Plamotamab  Products,  notice  of  this  decision  will  be
deemed to be notice of termination of this Agreement solely with respect to Plamotamab and the
Plamotamab Products under Section 13.3.2.1.

(1)

If  Janssen  decides  to  proceed  to  Develop  a
Plamotamab Product that is not a CD28/Plamotamab Combination, then Section 6.4.2 will apply.  

(2)

(b)

  This  Section
5.1.2.1(b) applies only if Janssen provides a Notice of Plamotamab POC Study After Successful
Exploration  or  Janssen  provides  a  Notice  of  Plamotamab  POC  Study  After  Unsuccessful
Exploration.

Plamotamab  POC  Study;  Post-POC  Decision. 

(i)

Conduct  of  Plamotamab  POC  Study.    Janssen  will  use
Diligent Efforts to conduct the Plamotamab POC Study in accordance with the timetables in the
Plamotamab Development Plan.  For purposes of this Section and other relevant provisions of the
Agreement, early termination by Janssen of the Plamotamab POC Study before completion (e.g.,
for safety reasons) will be treated as “completion.”  

Decision After Completion of Plamotamab POC Study.  After
completion of the Plamotamab POC Study, Janssen will notify Xencor of its decision (“Post-POC
Decision Notice”) to either: (A) proceed with Development of a CD28/Plamotamab

(ii)

[***] = 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

Combination or any other Plamotamab Product, and, if so, whether Janssen intends to proceed with
Development of a CD28/Plamotamab Combination (a “Plamotamab Development Election”); or
(B)  not  proceed  with  Development  of  any  Plamotamab  Product  (a  “No  Plamotamab
Development  Election”).  Janssen  shall  decide  between  Plamotamab  Development  Election  and
No  Plamotamab  Development  Election  in  its  sole  discretion  but  it  must  choose  one  of  such  two
options.

(1)

to  Proceed  with  Plamotamab
Development (CD28/Plamotamab Combination).  If Janssen provides a Post-POC Decision Notice
of Plamotamab Development Election stating that Janssen intends to proceed with Development of
a  CD28/Plamotamab  Combination,  then  (A)  Development  of  Plamotamab  and  Plamotamab
Products will continue in accordance with this Section 5.1 and (B) Section 6.4.1 will apply.  The
JDC will update or amend the Plamotamab Development Plan in accordance with Section 5.1.1.3
to include the contents described in Section 6.4.1.1.

Decision 

(2)

to  Proceed  with  Plamotamab
Development (Not a CD28/Plamotamab Combination).  If Janssen provides a Post-POC Decision
Notice  of  Plamotamab  Development  Election  that  does  not  state  that  Janssen  intends  to  proceed
with  Development  of  a  CD28/Plamotamab  Combination,  then  (A)  Development  of  Plamotamab
and Plamotamab Products will continue in accordance with this Section 5.1 and (B) Section 6.4.2
will apply.  The JDC will update or amend the Plamotamab Development Plan in accordance with
Section 5.1.1.3 to include the contents described in Section 6.4.2.1.

Decision 

Decision  not  to  Proceed  with  Plamotamab
Development.    If  Janssen  makes  a  No  Plamotamab  Development  Election,  then  notice  of  this
election  will  be  deemed  to  be  notice  of  termination  of  this  Agreement  solely  with  respect  to
Plamotamab and the Plamotamab Products under Section 13.3.2.1.  

(3)

(iii)

Notice After Completion of Plamotamab POC Study.

Decision Notice within [***] after completion of the Plamotamab POC Study.

(1)

Janssen  will  provide  Xencor  with  Post-POC

If  Janssen  does  not  provide  Post-POC
Decision Notice to Xencor within [***] after completion of the Plamotamab POC Study, Xencor
may  notify  Janssen  of  its  failure  and  Janssen  will  have  [***]  after  such  notice  from  Xencor  to
provide Post-POC Decision Notice.  If Janssen fails to respond within such [***] period, Janssen
will  be  deemed  to  have  given  notice  of  termination  of  this  Agreement  solely  with  respect  to
Plamotamab and the Plamotamab Products in accordance with Section 13.3.2.1.

(2)

(c)

Tafa/len Safety Run-in.  Xencor will have the option to proceed with
the  Tafa/len  Safety  Run-in.    If  Xencor  elects  to  proceed  with  such  study,  Xencor  will  notify  the
JDC  and  the  JDC  will  discuss  such  study  prior  to  Xencor  commencing  such  study.    If  Xencor
elects to proceed with such study, Xencor will use Diligent Efforts to conduct the Tafa/len Safety

[***] = 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

Run-in in accordance with the timetables in the Plamotamab Development Plan.  After completion
of  the  Tafa/len  Safety  Run-in,  Xencor  will  not  conduct  any  other  Development  of  Plamotamab
except pursuant to the Plamotamab Development Plan or as permitted under Section 5.1.3.

(d)

Know-How and IND/CTA Transfer for Plamotamab.  

(i)

Upon  Janssen’s  request  from  time  to  time  following  the
Effective  Date,  Xencor  will  reasonably  cooperate  with  Janssen  to  provide  reasonable  technical
assistance,  and  to  transfer  to  Janssen  any  Know-How  that  is  Xencor  Plamotamab  Intellectual
Property  licensed  to  Janssen  under  Section  8.1.1,  as  requested  by  Janssen  to  facilitate  Janssen’s
Development  efforts  related  to  Plamotamab  and  Plamotamab  Products.    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  Development  of  Plamotamab  or  Plamotamab
Products.  [***].  

(ii)

Prior  to  completion  of  the  Plamotamab  POC  Study,  Xencor
will  be  responsible  for  preparing,  submitting  and  maintaining  any  IND/CTAs  relating  to
Plamotamab  that  are  necessary  to  conduct  the  Initial  Development  Activities,  and  for  all
communications  with  any  Regulatory  Authorities  in  connection  with  such  INDs/CTAs.    Within
[***] after the earlier of Notice of Development Election Without CD28 or a Post-POC Decision
Notice  of  Plamotamab  Development  Election,  Xencor  will  deliver  to  Janssen  electronic  copies
(unless  otherwise  required  by  applicable  Law)  of  all  INDs/CTAs  and  related  submissions  and
correspondence with Regulatory Authorities relating to Plamotamab.  Upon the completion of such
transfer,  Xencor  will,  and  hereby  does,  assign  to  Janssen  all  such  INDs/CTAs  (and  related
submissions and correspondence) and will promptly (and in any case within [***]) take all steps
reasonably necessary to effectuate the assignment of all such INDs/CTAs, including submitting to
any  applicable  Regulatory  Authority  a  letter  or  other  necessary  documentation  (with  copy  to
Janssen)  notifying  the  Regulatory  Authority  of  the  assignment.    In  the  event  that  any  such
IND/CTA cannot be transferred within such [***] period, Xencor will take all actions reasonably
requested by Janssen with respect to the maintenance or transfer of such IND/CTA.

The  Party  that  is  holding  the  IND/CTA  with  respect  to
Plamotamab  will  have  the  right  to  submit  INDs/CTAs  and  communicate  with  Regulatory
Authorities with respect to Plamotamab subject to the following:

(iii)

(1)

Janssen  will  have  the  right  to  review  and
approve any material documents or correspondence relating to Plamotamab that Xencor plans to
submit to any Regulatory Authority in advance of their submission.  Xencor will provide drafts of
such  documents  or  correspondence  to  Janssen  at  least  [***]  in  advance  of  submission,  unless
circumstances  necessitate  a  shorter  time  for  review.    Material  documents  and  correspondence
received by Xencor from a Regulatory Authority will be provided to Janssen as soon as practicable
and, in any event, within [***] after receipt.  The Party that holds the IND/CTA will

[***] = 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

submit  such  documents  and  correspondence  to  the  applicable  Regulatory  Authority  following
approval by Janssen.  

(2)

Xencor  will  have  the  right  to  review  any
material documents or correspondence relating to Plamotamab that Janssen plans to submit to any
Regulatory  Authority  in  advance  of  their  submission.    Janssen  will  provide  drafts  of  such
documents  or  correspondence  to  Xencor  at  least  [***]  in  advance  of  submission,  unless
circumstances  necessitate  a  shorter  time  for  review.    Material  documents  and  correspondence
received by Janssen from a Regulatory Authority will be provided to Xencor as soon as practicable
and, in any event, within [***] after receipt.  

(3)

Subject to applicable Law, if Xencor holds the
IND/CTA,  Janssen  will  have  the  right  to  have  [***]  representative  participate  in  all  material
meetings  (including  by  telephone),  conferences  and  discussions  by  Xencor  with  Regulatory
Authorities  relating  to  Plamotamab.    Subject  to  applicable  Law,  if  Janssen  holds  the  IND/CTA,
Xencor  will  have  the  right  to  have  [***]  representative  participate  in  all  material  meetings
(including  by  telephone),  conferences  and  discussions  by  Janssen  with  Regulatory  Authorities
relating  to  Plamotamab.    The  Party  that  holds  the  IND/CTA  will  provide  the  other  Party  with
reasonable advance notice of all such meetings, conferences and discussions and advance copies of
all  related  documents  and  other  relevant  information  relating  to  such  meetings,  conferences  and
discussions.

5.1.2.2

General  –  Plamotamab  Development.    Neither  Party  will  conduct
Development of Plamotamab or any Plamotamab Product except for the Development activities set
forth  in  the  Plamotamab  Development  Plan  or  as  permitted  under  Section  5.1.3.    If,  at  any  time
before  Janssen  has  provided  Post-POC  Decision  Notice,  Janssen  conducts  or  authorizes  a  Third
Party to conduct any Development activities for a Plamotamab Product that are not set forth in the
Plamotamab Development Plan or that are not reasonably necessary to perform activities under the
Plamotamab  Development  Plan  (any  such  activity,  a  “Pre-POC  Decision  Development
Activity”),  then:  (x)  Xencor  may  notify  Janssen  that  Janssen  must  either  cease  the  relevant
Development  activity  or  make  Plamotamab  Development  Election;  (y)  Janssen  will  have  [***]
after such notice from Xencor to either cease the relevant Development activity or provide notice
of Plamotamab Development Election; and (z) if Janssen fails to respond within such [***] period,
Janssen will be deemed to have provided notice of Plamotamab Development Election on the last
day  of  such  [***]  period  (and  shall  pay  the  Development  Decision  Milestone  Payment  in
accordance  with  Section  7.2.2).    For  clarity,  any  notice  of  Plamotamab  Development  Election
provided  in  accordance  with  this  Section  5.1.2.2  shall  be  deemed  Post-POC  Decision  Notice  of
Plamotamab Development Election regardless of when given.   Notwithstanding the foregoing, if
Janssen disputes in good faith whether it has conducted (or authorized a Third Party to conduct) an
alleged  Pre-POC  Decision  Development  Activity  and  provides  Xencor  notice  of  such  dispute
within [***] after Xencor notifies Janssen of the alleged Pre-POC Decision Development Activity,
then Janssen will not have to make an election under clause (y) or (z) with respect to such alleged
Pre-POC Decision Development Activity unless and until 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.

43

dispute resolution process in ARTICLE 15 has finally determined that such activity is a Pre-POC
Decision Development Activity.

5.1.2.3

Responsibility for Plamotamab Development Activities.  Except as set
forth in Section 5.1.2.1 or permitted under Section 5.1.3 or unless the JDC determines otherwise,
Janssen  will  be  solely  responsible  for  conducting  all  Clinical  Studies  and  all  other  Development
activities  in  the  Plamotamab  Development  Plan  and  CMC  Development  Activities  for  the
Plamotamab Products.

5.1.2.4

Standards  of  Conduct  for  Plamotamab  Development  Activities;
Records.  Each Party will conduct all Development of Plamotamab and Plamotamab Products in
good scientific manner and in compliance with all applicable Law, including GMP, GLP and GCP,
as  applicable.    Each  Party  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 intellectual property protection purposes.

5.1.2.5

Safety Concerns for Plamotamab Development Activities.  

(a)

Notwithstanding  anything  to  the  contrary  in  this  Agreement  or  the
Plamotamab Development Plan, a Party will not be obligated to commence or continue a Clinical
Study  of  a  Plamotamab  Product  if  such  Party  reasonably  determines  that  such  Clinical  Study
would pose an unacceptable safety or tolerability risk for the study subjects.  The conducting Party
will so notify the other Party 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.

(b)

If  the  Party  that  is  not  responsible  for  conducting  a  Clinical  Study
believes  in  good  faith  that  termination  or  suspension  of  a  Clinical  Study  of  the  Plamotamab
Products is warranted because of safety or tolerability risks to the study subjects, then such Party
will so notify the other Party and the Parties will discuss the non-conducting Party’s concerns in
good faith to determine whether to terminate, suspend, modify or continue such Clinical Study.

5.1.2.6

Reports for Plamotamab Development Activities.  In advance of each
meeting of the JDC, each Party will provide to the JDC a high-level summary report summarizing
(a)  its  Development  activities  with  respect  to  the  Plamotamab  Products  that  such  Party  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
Plamotamab Development Plan, and (b) its anticipated Development activities with respect to the
Plamotamab Products for the subsequent Calendar Quarter.    

5.1.2.7

Day-to-Day  Responsibility  for  Plamotamab  Development  Activities.
 Each Party will be responsible for day-to-day implementation of the Development activities with
respect to the Plamotamab Products for which such Party is assigned

[***] = 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.

44

responsibility in this Agreement or the Plamotamab Development Plan.  The conducting Party 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, the conducting Party will have
the right to select and engage clinical trial sites), as long as such decisions do not conflict with the
Plamotamab  Development  Plan  or  any  decision  of  the  JDC  with  respect  to  such  Development
activity.

5.1.2.8

Plamotamab Development Activities Conducted by Xencor.  

activities that are allocated to Xencor under the Plamotamab Development Plan.

(a)

Xencor will be the sponsor of, conduct and control any Development

(b)

Unless otherwise approved in writing by Janssen, Xencor will obtain
and  maintain  rights  in  all  data  and  results  of  any  Development  activities  with  respect  to
Plamotamab Products that are conducted by Xencor that are consistent with the rights granted to
Janssen, and Xencor’s obligations to Janssen, under this Agreement with respect to such data and
results.  Xencor will provide to Janssen, on a rolling basis, all such data and results promptly after
they become available to Xencor.  Unless otherwise approved in writing by Janssen, Janssen will
have the right to access such data and results, and such data and results are deemed to be Xencor
Plamotamab Know-How for purposes of this Agreement.  For clarity, this Section 5.1.2.8 does not
apply  to  any  Development  activities  relating  to  any  Independent  Plamotamab/Tafa  Study,  which
will be subject to the terms of Section 5.1.3.    

(c)

As soon as possible following database lock for any Clinical Study
of Plamotamab conducted by Xencor, but no later than [***] after such date, Xencor will provide
to  Janssen  a  data  package  for  the  study  that  contains:  (i)  a  high-level  summary  of  the  available
results  from  the  study;  and  (ii)  to  the  extent  actually  available  to  Xencor  at  such  time,  all
translational  research  data  and  safety  and  efficacy  analyses  conducted  with  respect  to  the  data
generated  from  the  study.    Xencor  will  provide  to  Janssen  the  final  clinical  study  report  and  a
complete data set promptly following completion of the report.  Such data package will be deemed
Confidential  Information  of  Xencor.    This  paragraph  does  not  apply  to  any  Independent
Plamotamab/Tafa Study, which will be subject to the terms of Section 5.1.3.

(d)

If any Clinical Study of Plamotamab conducted by Xencor includes a
Third Party product and the study is conducted or such Third Party product is supplied pursuant to
an agreement between such Third Party and Xencor (or any of its Affiliates), then such agreement
will be in writing and will be consistent with the terms and conditions set forth in this Agreement.
  Xencor  shall  not  grant  any  rights  with  respect  to  Plamotamab  or  Plamotamab  Products  to  such
Third Party that conflict with Janssen’s rights or Xencor’s obligations under this Agreement with
respect  to  Plamotamab  and  Plamotamab  Products.    Xencor  will  provide  Janssen  a  copy  of  such
agreement  prior  to  commencing  such  study,  provided  that  Xencor  will  be  permitted  to  redact
commercially  sensitive  terms  to  the  extent  such  terms  are  not  necessary  for  Janssen  to  confirm
compliance with 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.

45

5.1.3 Development  of  Plamotamab/Tafa  Combination;  Independent  Plamotamab/Tafa

Studies.

5.1.3.1

Proposed  Plamotamab/Tafa  Studies.    Following  completion  of  the
Tafa/len  Safety  Run-in,  Xencor  may  propose  an  update  or  amendment  to  the  Plamotamab
Development  Plan  to  add  a  Clinical  Study  of  a  Plamotamab/Tafa  Combination  Regimen  (a
“Proposed Plamotamab/Tafa Study”)  in  accordance  with  Section  5.1.1.3.    “Plamotamab/Tafa
Combination Regimen” means a Combination Regimen that includes a Plamotamab Product and
tafasitamab and may include Third Party products for which Marketing Approval has been granted
by the relevant Governmental Authority [***].  

5.1.3.2

Addition  of  Plamotamab/Tafa  Study  to  Plamotamab  Development
Plan.    If  the  JDC  approves  such  update  or  amendment  in  accordance  with  Section  5.1.1.3,  the
Plamotamab Development Plan will be amended to include the Proposed Plamotamab/Tafa Study
in accordance with Section 5.1.1.3.  

5.1.3.3

Plamotamab/Tafa Study Proposal.  If the JDC does not approve such
update  or  amendment  in  accordance  with  Section  5.1.1.3  and  Xencor  desires  to  conduct  the
Proposed Plamotamab/Tafa Study at its own expense, Xencor may submit a detailed proposal for
such  study  to  Janssen  (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:  hypothesis;
medical/scientific  rationale  for  conducting  the  proposed  study;  dose  and  schedule  to  be  studied;
details  about  the  treatment  regimen,  including  route  of  administration;  eligibility  criteria  of
patients; number of patients; duration of treatment; duration of enrollment; the regions where the
study will be open; study objectives and endpoints; and timelines. The proposal will also include
all available safety and other clinical data regarding any non-Plamotamab Products included in the
Plamotamab/Tafa  Combination  Regimen  and  a  description  of  any  agreement  or  arrangement
between the proposing Party and a Third Party with respect to the any non-Plamotamab Products
included in the Plamotamab/Tafa Combination Regimen relating to rights to intellectual property,
data  or  development  or  commercialization  of  such  Product.    If  Janssen  notifies  Xencor  within
[***]  following  receipt  that  the  proposal  is  not  complete,  Xencor  will  provide  the  missing
information as soon as possible.  The date on which Janssen is in receipt of a complete proposal is
deemed to be the “Proposal Delivery Date.”  

5.1.3.4

Review of Proposal.  Janssen will consider the proposal in good faith
and will notify Xencor in accordance with Section 16.7 within [***] after the Proposal Delivery
Date (the “Proposal Review Period”) whether it objects to the Proposed Plamotamab/Tafa Study.
 Janssen may object only for reasonable safety concerns based on data for the relevant Plamotamab
Product  proposed  for  the  study  or  publicly  available  product  safety  data  for  products  having  the
same  mechanism  of  action,  or  reasonable  safety  concerns  based  on  data  for  any  Third  Party
product included in the regimen for such Proposed Plamotamab/Tafa Study (“Plamotamab Safety
Concerns”).  If Janssen objects to the proposed study, Xencor may not conduct the proposed study.

[***] = 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

5.1.3.5

Conduct of Independent Plamotamab/Tafa Study.  If Janssen does not
object  to  the  Proposed  Plamotamab/Tafa  Study  within  the  Proposal  Review  Period,  or  does  not
respond  to  a  proposal  within  the  Proposal  Review  Period:  (i)  Xencor  may  conduct  the  study  (a
“Independent Plamotamab/Tafa Study”) in accordance with the terms and conditions set forth in
this  Section  5.1.3.5;  and  (ii)  Janssen  shall  not  conduct  such  Proposed  Plamotamab/Tafa  Study
unless and until it makes the Independent Plamotamab/Tafa Study Opt-in Payment for such study
in accordance with Section 5.1.3.5(f).  

(a)

Xencor will be the sponsor of, conduct and control the Independent
Plamotamab/Tafa  Study  and  will  have  the  sole  right  to  make  operational  and  administrative
decisions regarding the study (e.g.,  the  right  to  select  and  engage  clinical  trial  sites).   The  study
will  be  conducted  in  accordance  with  the  proposal  submitted  by  Xencor  to  Janssen  and  in
accordance with Section 5.1.2.4 and Section 5.1.2.5.

(b)
and results of the study.  

Xencor  will  provide  Janssen  with  quarterly  reports  on  the  progress

(c)

Xencor  will  be  solely  responsible  for  all  costs  and  expenses  of
conducting  the  study,  including  drug  supply  costs.    If  responsibility  for  Manufacturing  of
Plamotamab has been transferred to Janssen under Section 5.3, Janssen shall supply Xencor with
Plamotamab  and  Plamotamab  Products  for  such  study  at  Janssen’s  pass-through  cost  (with  no
markup) upon Xencor’s reasonable request (subject to Section 5.1.3.5(d) below).  If responsibility
for  Manufacturing  of  Plamotamab  has  not  yet  been  transferred  to  Janssen  under  Section  5.3,
Xencor  shall  be  responsible  for  Manufacturing  or  obtaining  supply  of  Plamotamab  and
Plamotamab Products for the study (subject to Section 5.1.3.5(d) below).

(d)

If  there  are  limited  supplies  of  Plamotamab  at  the  time  Xencor
proposes  to  commence  an  Independent  Plamotamab/Tafa  Study,  the  Party  that  is  responsible  for
Manufacturing of Plamotamab will prioritize any Clinical Studies in the then-current Plamotamab
Development Plan over the Independent Plamotamab/Tafa Study when allocating such supplies.  If
Janssen  is  responsible  for  Manufacturing  of  Plamotamab,  then:  (i)  Janssen  will  be  permitted  to
reject  Xencor’s  orders  for  Plamotamab  Product  only  to  the  extent  of  such  limitations  of  supply
after prioritizing the Clinical Studies in such Plamotamab Development Plan; and (ii) Janssen shall
use Commercially Reasonable Efforts to supply the quantity of Plamotamab Product requested by
Xencor in the rejected portion of Xencor’s orders.  If Xencor is responsible for Manufacturing of
Plamotamab, then Xencor will first allocate supplies of Plamotamab to the Clinical Studies in the
then-current Plamotamab Development Plan before allocating any supplies of Plamotamab to the
Independent Plamotamab/Tafa Study.

(e)

Neither  the  Development  Decision  Milestone  Event  nor  any
Plamotamab Milestone Event will be deemed to be achieved based on the conduct or the results of
the study, and Janssen shall not be required to pay any milestone payments based on the conduct or
the results of the study.

[***] = 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

(f)

Janssen will have the right to add the Independent Plamotamab/Tafa
Study  to  the  Plamotamab  Development  Plan  at  any  time  by  making  a  payment  to  Xencor  in  an
amount equal to [***] of the costs incurred by Xencor or its Affiliates (but not any Third Parties,
except to the extent Xencor or its Affiliates are obligated to reimburse such Third Parties for actual
out-of-pocket costs incurred by such Third Parties) in the conduct of such study, to the extent such
costs  would  satisfy  the  definition  of  Shared  Development  Costs  had  the  study  been  conducted
under  the  Plamotamab  Development  Plan  (the  “Independent  Plamotamab/Tafa  Study  Opt-in
Payment”  for  such  Independent  Plamotamab/Tafa  Study).    Upon  Xencor’s  receipt  of  such
payment,  (i)  the  Plamotamab  Development  Plan  will  be  deemed  to  be  amended  to  add  the
Independent  Plamotamab/Tafa  Study  (and,  if  the  Parties  agree  that  Janssen  will  assume
responsibility for conducting such study, then Janssen shall use Diligent Efforts to complete such
Independent Plamotamab/Tafa Study), (ii) the remaining costs for such study will be borne 80% by
Janssen and 20% by Xencor, (iii) this Section 5.1.3.5 shall no longer apply to such study, except
that Section 5.1.3.5(i) and Section 5.1.3.5(j) will continue to apply, and (iv) the other provisions of
this Section 5.1 (except Section 5.1.2.8(b)) will apply to such study.  

(g)

Xencor and its Affiliates (and, if the Plamotamab/Tafa Combination
Regimen involves a Third Party product, such Third Party) will have no right to seek (or require
Janssen to seek) Marketing Approval or a label extension for any Plamotamab/Tafa Combination
Regimen.  Xencor shall not grant any Third Party the right to do so. Janssen will retain the sole and
exclusive  right  to  commercialize  Plamotamab  and  Plamotamab  Products  in  accordance  with
Section 5.2.  Without limiting its obligations under Section 6.4 (to the extent applicable), Janssen
to  Commercialize  any
will  have  no  obligation 
Plamotamab/Tafa Combination Regimen.  

to  seek  Marketing  Approval  for  nor 

The Party that is holding the IND/CTA with respect to Plamotamab
will  have  the  right  to  submit  INDs/CTAs  and  communicate  with  Regulatory  Authorities  with
respect to the study subject to the following:  

(h)

(i)

Janssen  will  have  the  right  to  review  and  approve  any
documents or correspondence relating to the study that Xencor plans to submit to any Regulatory
Authority  in  advance  of  their  submission.    Xencor  will  provide  drafts  of  such  documents  or
correspondence  to  Janssen  at  least  [***]  in  advance  of  submission,  unless  circumstances
necessitate a shorter time for review.  Material documents and correspondence received by Xencor
from a Regulatory Authority will be provided to Janssen as soon as practicable and, in any event,
within  [***]  after  receipt.    The  Party  that  holds  the  IND/CTA  will  submit  such  documents  and
correspondence to the applicable Regulatory Authority following approval by Janssen.  

Subject  to  applicable  Law,  if  Xencor  holds  the  IND/CTA,
Janssen  will  have  the  right  to  have  one  representative  participate  in  all  material  meetings
(including  by  telephone),  conferences  and  discussions  by  Xencor  with  Regulatory  Authorities
relating to the study.  Subject to applicable Law, if Janssen holds the IND/CTA, Xencor will

(ii)

[***] = 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

have  the  right  to  have  one  representative  participate  in  all  material  meetings  (including  by
telephone),  conferences  and  discussions  by  Janssen  with  Regulatory  Authorities  relating  to  the
study.    The  Party  that  holds  the  IND/CTA  will  provide  the  other  Party  with  reasonable  advance
notice  of  all  such  meetings,  conferences  and  discussions  and  advance  copies  of  all  related
documents and other relevant information relating to such meetings, conferences and discussions.

(i)

Xencor will obtain rights in all data and results of the study that are
consistent with the rights granted to Janssen, and Xencor’s obligations to Janssen, with respect to
the  disclosure  and  use  of  such  data  and  results  under  this  Agreement.    Xencor  will  provide  to
Janssen,  on  a  rolling  basis,  all  such  data  and  results  promptly  after  they  become  available  to
Xencor.  Without limiting the foregoing, Janssen will have the right to access, and Xencor hereby
grants  to  Janssen  a  license  to  use  and  a  right  of  reference  to,  all  safety  data  generated  from  the
study (“Independent Plamotamab/Tafa Study Safety Data”) to the extent necessary for Janssen
to  prepare  and  submit  any  regulatory  filings  with  respect  to  Plamotamab  or  any  Plamotamab
Product  (including  any  CD28/Plamotamab  Combination).   After  (and  only  after)  payment  of  the
Independent Plamotamab/Tafa Study Opt-in Payment for such study, Janssen will have the right to
access  all  data  and  results  from  the  study,  and  such  data  and  results  will  become  Xencor
Plamotamab  Know-How  for  purposes  of  this  Agreement.    Notwithstanding  anything  to  the
contrary in this Agreement: (i) with respect to any activities conducted in connection with [***],
this paragraph only applies to the extent of Xencor’s rights and is subject to Xencor’s obligations
under [***]; (ii) Xencor shall have no obligation to provide Janssen with any right of reference to
any  data  resulting  from  an  Independent  Plamotamab/Tafa  Study  (other  than  to  Independent
Plamotamab/Tafa  Study  Safety  Data)  unless  Janssen  has  paid  the  Independent  Plamotamab/Tafa
Study  Opt-in  Payment  for  such  study  or  has  paid  Xencor  the  Development  Decision  Milestone
Payment; and (iii) unless and until Janssen has paid the Independent Plamotamab/Tafa Study Opt-
in Payment for such study or has paid Xencor the Development Decision Milestone Payment, all
data  and  results  of  such  study  (other  than  to  Independent  Plamotamab/Tafa  Study  Safety  Data)
shall be deemed the Confidential Information of Xencor (and not Xencor Plamotamab Know-How)
that  Janssen  shall  use  only  for  the  purposes  of  evaluating  whether  to  make  Plamotamab
Development  Election  or  to  add  such  Independent  Plamotamab/Tafa  Study  to  the  Plamotamab
Development Plan pursuant to Section 5.1.3.5(f).  

(j)

As  soon  as  possible  following  database  lock  for  the  study,  but  no
later than [***] after such date, Xencor will provide to Janssen a data package for the study that
contains:  (i)  a  high-level  summary  of  the  available  results  from  the  study;  and  (ii)  to  the  extent
actually  available  to  Xencor  at  such  time,  all  translational  research  data  and  safety  and  efficacy
analyses  conducted  with  respect  to  the  data  generated  from  the  study.    Xencor  will  provide  to
Janssen  the  final  clinical  study  report  and  a  complete  data  set  promptly  following  completion  of
the report.  Such data package will be deemed Confidential Information of Xencor.

Subject  to  Section  9.2.2.2,  with  respect  to  any  rights  to  any
inventions  that  relate  to  the  Plamotamab/Tafa  Combination  Regimen  that  are  conceived  in  the
course of performing the study relating solely to Plamotamab will be solely owned by Xencor.

(k)

[***] = 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

study would be subject to the review procedures set forth in Section 10.8.

(l)

Proposed  publications  and  disclosures  of  data  generated  from  the

(m)

If the Plamotamab/Tafa Combination Regimen that is the subject of
the study includes a Third Party product and the study is conducted or such Third Party product is
supplied pursuant to an agreement between such Third Party and Xencor (or any of its Affiliates),
then such agreement must be (1) in writing, (2) consistent with the terms and conditions set forth in
this Section 5.1.3.5, including Janssen’s rights with respect to the disclosure and use of data and
results  under  Section  5.1.3.5(i),  and  (3)  not  conflict  with  any  of  Janssen’s  rights  or  Xencor’s
obligations with respect to Plamotamab and Plamotamab Products under this Agreement.  Xencor
will provide Janssen a copy of such agreement as part of the proposal for the study submitted in
accordance  with  Section  5.1.3.3,  provided  that  Xencor  will  be  permitted  to  redact  commercially
sensitive terms to the extent such terms are not necessary for Janssen to confirm compliance with
this Agreement.  

5.1.3.6

Pre-Approved  Independent  Plamotamab/Tafa  Studies. 

  Janssen
hereby  acknowledges  and  agrees  that,  as  of  the  Execution  Date,  it  has  not  identified  any
Plamotamab  Safety  Concerns  with  respect  to  the  Pre-Approved  Studies.    If  Xencor  desires  to
conduct  any  Pre-Approved  Study,  it  will  be  subject  to  the  foregoing  terms  of  this  Section  5.1.3;
provided,  however,  that  for  purposes  of  Section  5.1.3.4,  only  Plamotamab  Safety  Concerns
identified  by  Janssen  based  on  data  from  the  Tafa/len  Safety  Run-in  may  be  the  basis  of  an
objection  to  Pre-Approved  Study  and  any  objection  not  based  on  such  data  shall  not  be  deemed
(for purposes of Section 5.1.3.4) to be an objection to such Pre-Approved Study.

5.1.4 Shared  Development  Costs  for  Plamotamab  Development  Activities.    Shared
Development  Costs  for  the  Plamotamab  Products  incurred  on  or  after  the  Effective  Date  by  the
Parties and their Affiliates will be shared in accordance with Section 6.2.3.4.  For all purposes of
this Agreement, Xencor’s Manufacturing Cost of Clinical Supply (as if Manufactured by Xencor
under  this  Agreement)  incurred  prior  to  the  Effective  Date  for  Plamotamab  Products  used  in
performance of the Plamotamab Development Plan shall be deemed Shared Development Costs for
the  Plamotamab  Products  incurred  on  or  after  the  Effective  Date  (even  if  Xencor  incurred  such
Out-of-Pocket Expenses prior to the Effective Date).

5.2

Commercialization of Plamotamab Products.  

5.2.1 General – Commercialization of Plamotamab Products.  Subject to the Plamotamab
Co-Detailing Option, Janssen will have the sole and exclusive right to Commercialize Plamotamab
and Plamotamab Products (including CD28/Plamotamab Combinations) in the Territory at its sole
cost  and  expense. 
  Janssen  will  have  sole  decision-making  authority  over  global
Commercialization matters for Plamotamab Products, including pricing and reimbursement.

[***] = 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

5.2.2 Standards of Conduct for Commercialization of Plamotamab Products.  Janssen will
conduct  all  Commercialization  activities  for  Plamotamab  Products  under  this  Agreement  in
compliance with all applicable Laws.

5.2.3 Plamotamab  Co-Detailing  Option.    Janssen  hereby  grants  to  Xencor  the  right  to
elect to co-Detail Plamotamab Products (including CD28/Plamotamab Combinations) in the U.S.
on the same terms as set forth in Section 6.3 for the Licensed CD28 Products (the “Plamotamab
Co-Detailing Option”).  Xencor may exercise the Plamotamab Co-Detailing Option on the terms
set forth in Section 6.3, in which case the terms of Section 6.3 will apply except that all references
to  “Licensed  CD28  Product”  or  “Licensed  CD28  Products”  will  be  deemed  to  refer  to
“Plamotamab Product” or “Plamotamab Products,” as applicable.

5.2.4 Commercialization  Reports  for  Plamotamab  Products.    On  an  annual  basis  within
[***]  after  the  completion  of  each  Calendar  Year  after  the  First  Commercial  Sale  of  any
Plamotamab Product, Janssen will provide Xencor a high-level summary of its Commercialization
launch status and performance for Plamotamab Products since the previous summary and a high-
level  summary  of  Janssen’s  projected  Commercialization  activities  for  the  subsequent  Calendar
Year.

5.3

Manufacturing of Plamotamab Products.

5.3.1

Joint  Manufacturing  Team.    Promptly  after  the  Effective  Date,  the  Parties  will
establish a joint manufacturing team (the “JMT”) to oversee and serve as a forum to discuss CMC
Development Activities and Manufacturing for Plamotamab and Plamotamab Products.  The JMT
will be composed of an equal number of representatives of each Party.  The JMT will report to the
JDC and will make recommendations to the JDC with respect to CMC Development Activities and
Manufacturing  for  Plamotamab  and  Plamotamab  Products.    The  JMT  will  have  no  decision-
making authority.

5.3.2

Initial  Development  Activities.    [***],  Xencor  will  be  responsible  for  CMC
Development Activities and Manufacturing for Plamotamab and Plamotamab Products, except as
set forth in Section 5.3.3.    Xencor  will  supply  (or  obtain  from  its  Third  Party  CMO)  all  clinical
supplies  of  Plamotamab  and  Plamotamab  Products  necessary  to  conduct  the  Initial  Development
Activities.  

5.3.3 Alternative  Formulation  Development. 

  The  Parties  will  conduct  CMC
Development Activities for an alternative formulation of Plamotamab to support a higher dose and
higher  concentration  of  Plamotamab  than  the  formulation  that  is  the  subject  of  the  Phase  1
Exploration  Study  as  of  the  Effective  Date  (such  alternative  formulation,  the  “Alternative
Plamotamab Formulation”).   Within  [***]  after  the  Effective  Date,  the  JMT  will  develop,  and
submit to the JDC for approval, a plan to identify new and optimal formulation concentrations of
Plamotamab  and  Plamotamab  Products,  and  a  plan  for  rapid  introduction  into  clinical
Development  of  such  Plamotamab  Products.    Such  plan  will  include  a  budget  for  the  applicable
CMC Development Activities and may involve the use of Third Party CMOs to produce 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.

51

clinical material for the Alternative Plamotamab Formulation.  Upon JDC approval of such plan,
the activities in such plan will be deemed to be added to the Plamotamab Development Plan, and
the Plamotamab Development Budget will be deemed to be updated to incorporate the budget for
such activities.  

right 

to  Manufacture  Plamotamab 

5.3.4 After  Plamotamab  Development  Election.  [***],  Janssen  will  have  the  sole  and
(including
exclusive 
CD28/Plamotamab Combinations) in the Territory at its sole cost and expense.  [***], Xencor will
conduct  a  technology  transfer  to  Janssen  (or  its  designated  CMO)  for  Plamotamab  and
Plamotamab Products.  The technology transfer will be conducted in accordance with a technology
transfer  plan  developed  by  the  JMT  and  approved  by  the  JDC.    Xencor  will  maintain  its
agreements with Patheon and any other Third Party CMOs that are in effect on the Execution Date
until the technology transfer to Janssen (or its designated CMO) is complete or unless such Third
Party CMO materially failures to perform under such agreement.  

and  Plamotamab  Products 

5.3.5 Use  of  Inventory.    To  the  extent  reasonably  possible  in  performing  the  activities
under the Plamotamab Development Plan and in compliance with GCP and Law, the Parties will
use  Xencor’s  existing  inventory  of  Plamotamab  and  Plamotamab  Products  prior  to  using
Plamotamab and Plamotamab Products Manufactured after the Effective Date.  

ARTICLE 6
XENCOR OPTION RIGHTS FOR LICENSED CD28 PRODUCTS; DILIGENCE;
SHARED DEVELOPMENT COSTS

General – CD28 Options.  Janssen hereby grants to Xencor the right to elect to co-fund
6.1
worldwide  Development  of  Licensed  CD28  Products 
than  CD28/Plamotamab
Combinations)  in  the  Territory  on  the  terms  set  forth  in  Section  6.2  (the  “CD28  Co-Funding
Option”).    If  Xencor  exercises  the  CD28  Co-Funding  Option  in  accordance  with  Section  6.2,
Janssen hereby grants to Xencor the right to elect to co-Detail Licensed CD28 Products (other than
CD28/Plamotamab Combinations) in the U.S. on the terms set forth in Section 6.3 (the “CD28 Co-
Detailing Option”).  

(other 

6.2

CD28 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  CD28  Product  (other  than  a  CD28/Plamotamab  Combination)  to
achieve  Proof-of-Concept.    “Proof-of-Concept”  means  [***].  “Proof-of-Concept  Date”  means,
with respect to a Licensed CD28 Product, the date on which Proof-of-Concept first occurs for such
Licensed CD28 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
CD28 Products (a “POC Data Package”).  The POC Data Package will include [***].

[***] = 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.

52

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 CD28 Co-Funding Option.  Xencor may exercise the CD28 Co-Funding
Option by providing notice to Janssen within [***] after the POC Data Package Delivery Date (the
“CD28 Co-Funding Option Exercise Date”).

6.2.3 Effect of CD28 Co-Funding Option Exercise.  On and after the CD28  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 CD28 Products worldwide:  

6.2.3.1

Definitions.

(a)

“Manufacturing Cost of Clinical Supply” means, with respect to a
Licensed  CD28  Product  or  Plamotamab  Product,  a  Party’s  reasonable  internal  and  Third  Party
costs  incurred  in  manufacturing  or  acquisition  of  (and  to  the  extent  directly  attributable  to)  such
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:

(i)

“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
manufacture),  in  each  case,  to  the  extent  directly  attributable  to  Licensed  CD28  Products  or
Plamotamab  Products,  as  applicable,  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  CD28
Products or Plamotamab Products, as applicable, Manufactured by a Party under this Agreement or
under a supply agreement between the Parties; 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.

53

(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  CD28
Antibodies  or  Licensed  CD28  Products,  or  Plamotamab  or  Plamotamab  Products,  as  applicable,
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  CD28  Products  or  Plamotamab  Products,  as
applicable, Manufactured by a Party under this Agreement or under a supply agreement between
the Parties.  [***].  

(b)

“Development FTE”  means  [***]  of  work  in  direct  support  of  the
Development  of  the  Licensed  CD28  Products  or  Plamotamab  Products,  as  applicable,  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  CD28  Products  or
Plamotamab  Products,  as  applicable,  (including  the  project  management  teams  that  support  the
Licensed  CD28  Products  or  Plamotamab  Products,  as  applicable).    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)

(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.

[***] = 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

(e)

“Included  Medical  Affairs  Studies”  means  post-marketing
commitments  and  other  post-approval  Clinical  Studies  conducted  in  support  of  obtaining
Marketing Approval of a Licensed CD28 Product or Plamotamab Product, as applicable (e.g., IISs,
cooperative  group  studies,  or  studies  conducted  by  Janssen  for  an  additional  Indication  or  label
expansion).  

(f)

“Included Medical Affairs Studies Costs” means, with respect to a
particular Licensed CD28 Product or Plamotamab 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 CD28 Development Plan with respect to such Licensed CD28 Product or
in the Plamotamab Development Plan with respect to such Plamotamab Product.

(g)

“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
CD28  Antibodies  and  Licensed  CD28  Products,  or  Plamotamab  and  Plamotamab  Products,  as
applicable, 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.

(h)

“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  CD28  Products  under  the  CD28  Development  Plan  or  with
respect to Plamotamab Products under the Plamotamab Development Plan, including:

(i)

all  Development  FTE  Costs  and  Out-of-Pocket  Expenses
incurred  for  activities  specified  in  the  applicable  Development  Plan  (including  for  Included
Medical  Affairs  Studies  up  to  the  CD28  Included  Medical  Affairs  Studies  Costs  Limit  or
Plamotamab  Included  Medical  Affairs  Studies  Costs  Limit,  as  applicable),  and  all  Development
FTE  Costs  and  Out-of-Pocket  Expenses  incurred  for  CMC  Development  Activities,  even  if  not
specified in the applicable Development Plan;

(ii)

with  respect  to  non-clinical  and  clinical  research  and  drug
development  activities  (including  Clinical  Studies)  for  the  Licensed  CD28  Products  or
Plamotamab Products, as applicable, the Manufacturing Cost of Clinical Supply for such products
and  for  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;

[***] = 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.

55

(iii)

with  respect  to  regulatory  activities  for  the  Licensed  CD28
Products  or  Plamotamab  Products,  as  applicable,  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

Expenses incurred that are expressly included in the applicable Development Budget.

(iv)

any  other  Development  FTE  Costs  and  Out-of-Pocket

For  clarity,  Shared  Development  Costs  for  CD28/Plamotamab  Combinations  will  be  included  in
the  Plamotamab  Development  Budget  and  will  be  treated  as  Shared  Development  Costs  for  the
Plamotamab Products.    

Notwithstanding  anything  to  the  contrary  in  this  Agreement,  Shared  Development  Costs  do  not
  Shared
include  [***]  (the  “CD28  Included  Medical  Affairs  Studies  Costs  Limit”). 
Development  Costs  for  the  Plamotamab  Products  do  not  include  [***]  (the  “Plamotamab
Included Medical Affairs Studies Costs Limit”).  

6.2.3.2

CD28 Development Plan and Budget.  

(a)

General.    Janssen  will  conduct  Development  of  Licensed  CD28
Products (other than CD28/Plamotamab Combinations) in accordance with the CD28 Development
Plan.  “CD28 Development Plan” means the written plan for Janssen’s Development of Licensed
CD28  Products  (other  than  CD28/Plamotamab  Combinations)  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  CD28  Development  Plan  will  include  the
CD28 Development Budget, as described in Section 6.2.3.2(b)(ii) below.  

(b)

CD28 Development Plan Contents.  

(i)

The  CD28  Development  Plan  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  CD28  Products  in  the  Territory.
  For  clarity,  the  CD28  Development  Plan  will  not  include  any  Development  activities  for  any
CD28/Plamotamab Combination.

(ii)

The CD28 Development Plan will include a [***] budget for
Shared  Development  Costs  to  be  incurred  by  Janssen  in  conducting  the  Development  activities
described in the CD28 Development Plan 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 “CD28 Development Budget”).  The [***] of each CD28 Development Budget will be
binding  on  the  Parties  to  the  extent  provided  in  Section  6.2.3.4(e),  and  [***]  of  such  CD28
Development Budget will serve as non-binding guidance for the Parties.  

[***] = 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

For clarity, the CD28 Development Budget will not include any Shared Development Costs for any
CD28/Plamotamab Combination.

Medical Affairs Studies for the Licensed CD28 Products.  

(iii)

The  CD28  Development  Plan  will  also  describe  Included

CD28 Development Plan.  

(c)

Initial  CD28  Development  Plan;  Updates  and  Amendments  to  the

(i)

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  CD28
Development Plan and CD28 Development Budget for the Licensed CD28 Products.  The CD28
Development Plan (including the CD28 Development 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 CD28 Development Plan annually.
  Janssen  will  prepare,  and  submit  to  the  JDC  for  review,  an  updated  CD28  Development  Plan
(excluding the CD28 Development Budget) on or before [***] of the then-current Calendar Year.
 When Janssen is preparing the updated CD28 Development Plan, Janssen will reasonably consider
Xencor’s  input  into  the  Clinical  Study  design  and  key  Development  activities  in  the  CD28
Development  Plan.    Janssen  will  prepare,  and  submit  to  the  JDC  for  review,  an  updated  CD28
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 CD28 Development Plan.

(v)

Either Party may submit a proposed update or amendment to
the CD28 Development Plan 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)

(vii)

If  the  JDC  approves  an  update  or  amendment  to  the  CD28
Development Plan (including any corresponding update or amendment to the CD28 Development
Budget), the CD28 Development Plan (including the CD28 Development Budget) will be deemed
to be amended accordingly on the date of such approval.  No update or amendment to the CD28
Development Plan will become effective unless and until the JDC (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.

57

Janssen,  under  Section  2.5)  approves  a  corresponding  update  or  amendment  to  the  CD28
Development Budget.

6.2.3.3

Conduct of Licensed CD28 Product Development Activities.

(a)

Responsibility  for  Licensed  CD28  Product  Development  Activities.
Janssen  will  be  solely  responsible  for  conducting  all  Clinical  Studies  and  all  other  Development
activities in the CD28 Development Plan and CMC Development Activities for the Licensed CD28
Products.

Activities.  

(b)

Safety  Concerns 

for  Licensed  CD28  Product  Development

(i)

Notwithstanding  anything  to  the  contrary  in  this  Agreement
or the CD28 Development Plan, Janssen will not be obligated to commence or continue a Clinical
Study  of  a  Licensed  CD28  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 CD28 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.

(c)

Reports  for  Licensed  CD28  Product  Development  Activities.
  Section  4.4.2.1  will  cease  to  apply  to  the  Licensed  CD28  Products  after  Xencor  exercises  the
CD28  Co-Funding  Option  in  accordance  with  Section  6.2  but  shall  continue  to  apply  after  the
CD28 Co-Funding Opt-Out Effective Date if Xencor provides CD28 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 CD28 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 CD28 Development Plan, and (b) its anticipated Development activities with respect to the
Licensed CD28 Products for the subsequent Calendar Quarter.

(d)

Day-to-Day Responsibility for Licensed CD28 Product Development
Activities.    Janssen  will  be  responsible  for  day-to-day  implementation  of  the  Development
activities  with  respect  to  the  Licensed  CD28  Products  and  will  have  the  right  to  make  all
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 CD28 Development Plan or
any decision of the JDC with respect to such Development activity.

[***] = 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

6.2.3.4

Shared  Development  Costs.    Shared  Development  Costs  (which  are
defined  in  Section  6.2.3.1)  for  the  Licensed  CD28  Products  incurred  on  or  after  the  CD28  Co-
Funding Option Exercise Date by the Parties and their Affiliates will be shared in accordance with
this Section 6.2.3.4.  In addition, Shared Development Costs for CD28/Plamotamab Combinations
and  the  Plamotamab  Products  incurred  by  the  Parties  and  their  Affiliates  will  be  shared  in
accordance with this Section 6.2.3.4.  

(a)

Cost Sharing.

(i)

Unless  and  until  Xencor  exercises  the  CD28  Co-Funding
Option  in  accordance  with  Section  6.2,  Janssen  will  bear  [***]  of  the  costs  of  Developing  the
Licensed  CD28  Products  (other  than  any  CD28/Plamotamab  Combination)  incurred  by  Janssen
and its Affiliates on and after the Effective Date, except for costs of conducting Research Program
activities in accordance with the Research Plan (which are subject to Section 3.5).  

(ii)

If  Xencor  exercises  the  CD28  Co-Funding  Option  in
accordance  with  Section  6.2,  Shared  Development  Costs  for  the  Licensed  CD28  Products  (other
than  any  CD28/Plamotamab  Combination)  incurred  on  or  after  the  CD28  Co-Funding  Option
Exercise Date by the Parties and their Affiliates will be borne 85% by Janssen and 15% by Xencor,
subject to Section 6.2.3.4(b).

Shared  Development  Costs  for  any  CD28/Plamotamab
Combination  incurred  on  and  after  the  Effective  Date  by  a  Party  and  its  Affiliates  will  be  borne
85% by Janssen and 15% by Xencor, subject to Section 6.2.3.4(b).

(iii)

(iv)

Shared  Development  Costs  for  Plamotamab  Products  (other
than any CD28/Plamotamab Combination) incurred on and after the Effective Date by a Party and
its  Affiliates  will  be  borne  80%  by  Janssen  and  20%  by  Xencor,  subject  to  Section  6.2.3.4(b),
except that Xencor will bear 100% of the costs for the Tafa/len Safety Run-in and any Independent
Plamotamab/Tafa Study.  

(b) Medical Affairs Study Costs.  

Included  Medical  Affairs  Studies  Costs  for  Licensed  CD28
Products  (other  than  any  CD28/Plamotamab  Combinations)  will  be  included  in  Shared
Development  Costs  for  the  Licensed  CD28  Products  up  to  the  CD28  Included  Medical  Affairs
Studies Costs Limit.

(i)

Products  (including  any  CD28/Plamotamab  Combinations)  will  be 
Development Costs up to the Plamotamab Included Medical Affairs Studies Costs Limit.

included 

Included  Medical  Affairs  Studies  Costs  for  Plamotamab
in  Shared

(ii)

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

(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.

59

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  CD28  Included  Medical  Affairs  Studies
Costs Limit or the Plamotamab Included Medical Affairs Studies Costs Limit, as applicable.

(c)

Reporting  and  Reconciliation.    Shared  Development  Costs  for  the
Plamotamab  Products  (including  any  CD28/Plamotamab  Combinations)  will  be  reported  and
reconciled  together  in  accordance  with  the  following  provisions  of  Section  6.2.3.4,  subject  to
Section 5.1.1.2(c).  If Xencor exercises the CD28 Co-Funding Option in accordance with Section
6.2, Shared Development Costs for the Licensed CD28 Products will be reported and reconciled
separately  in  accordance  with  this  Section  6.2.3.4  from  the  Shared  Development  Costs  for  the
Plamotamab Products and CD28/Plamotamab Combinations, subject to Section 6.2.3.2(b).

(d)

Cost Reports.

(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(e).
 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.  

(e)

Reimbursement of Shared Development Costs.

60

[***] = 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)

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 applicable
Development Budget, except as follows:

Shared  Development  Costs  in  excess  of  the
applicable 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  applicable
Development Budget for such Calendar Year; and

(1)

(2)

the  Parties  will  share  any  and  all  Shared
Development Costs in excess of the applicable 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  CD28  Product  or  Plamotamab  Product,  as
applicable.

(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(e)(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  applicable  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  applicable  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
applicable Development Budget for such Calendar Year will be borne solely by such Party and will
not be shared by the other Party.

 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

(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.

61

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 CD28  Co-Funding  Opt-Out.    Xencor  may  elect  to  terminate  its  rights  and
obligations set forth in this ARTICLE 6 (“CD28 Co-Funding Opt-Out”), including its obligation
to  co-fund  worldwide  Development  of  Licensed  CD28  Products  in  the  Territory  under  Section
6.2.3.4, by giving notice to Janssen (the “CD28 Co-Funding Opt-Out Notice”) at any time after
the  CD28  Co-Funding  Option  Exercise  Date.    Such  CD28  Co-Funding  Opt-Out  shall  become
effective  on  the  last  day  of  the  [***]  full  Calendar  Quarter  after  Xencor  gives  the  CD28  Co-
Funding  Opt-Out  Notice  (the  “CD28  Co-Funding  Opt-Out  Effective  Date”).    For  example,  if
Xencor  gives  the  CD28 Co-Funding  Opt-Out  Notice  in  the  first  Calendar  Quarter  of  a  Calendar
Year,  then  the  CD28  Co-Funding  Opt-Out  would  be  effective  as  of  the  last  day  of  the  [***]
Calendar Quarter of such Calendar Year.  After the CD28 Co-Funding Opt-Out Effective Date, the
following will apply:

(a)

  Xencor  will  have  no  further  rights  or  obligations  under  Section
6.2.3,  including  no  obligation  under  Section  6.2.3.4  to  pay  any  portion  of  Shared  Development
Costs incurred or attributable to Development activities for the Licensed CD28 Products after the
CD28  Co-Funding  Opt-Out  Effective  Date,  except  for  reporting  and  reimbursement  of  Shared
Development Costs incurred on or prior to the CD28 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
CD28 Co-Funding Opt-Out Effective Date.

(b)

Section 11.9, Xencor will be deemed to have never exercised the CD28 Co-Funding Option.

(c)

For  all  purposes  of  Section  2.2.2,  Section  4.4.2.1,  Section  6.4  and

(d)

For  purposes  of  Section  7.4,  after  the  CD28  Co-Funding  Opt-Out
Effective Date royalties will be calculated and payable on the terms set forth in Section 7.4.1.2.  If
the CD28 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
CD28  Co-Funding  Opt-Out  Effective  Date  occurred,  but  the  royalty  calculations  will  be  made
using the royalty rates in Section 7.4.1.2 beginning in the Calendar Quarter immediately following
the CD28 Co-Funding Opt-Out Effective Date.

(e)

The  Shared  Development  Costs  incurred  [***]  (the  “CD28  Co-
Funding Wind-down Period”) shall continue to be shared by the Parties on the terms set forth in
Section  6.2.3.4,  provided,  however,  that  if  Janssen  amends  the  CD28  Development  Plan  to
increase the aggregate amount of the CD28 Development Budget for such Calendar Quarters,

[***] = 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

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  CD28  Co-Funding  Wind-down
Period.

If Xencor exercised the CD28 Co-Detailing Option before giving the
CD28 Co-Funding Opt-Out Notice, then Xencor will be obligated to continue conducting Detailing
activities for the Licensed CD28 Products in accordance with Section 6.3.3 until [***].

(f)

(g)

The first two sentences of Section 4.4.2.1 will apply.  

For clarity, (x) Xencor’s exercise of the CD28 Co-Funding Opt-Out is irrevocable as of the date of
the CD28 Co-Funding  Opt-Out  Notice  and  (y)  Xencor’s  exercise  of  the  CD28  Co-Funding  Opt-
Out will have no effect on Xencor’s rights and obligations under ARTICLE 5 and Section 6.2.3.4
with  respect  to  CD28/Plamotamab  Combinations.    Except  as  provided  in  this  Section  6.2.4,  this
ARTICLE 6 and Section 7.4.1.3 will be of no further force and effect after the CD28 Co-Funding
Opt-Out Effective Date.

6.3
CD28  Co-Detailing  Option.    If  Xencor  exercises  the  CD28  Co-Funding  Option  in
accordance with Section 6.2, Xencor may exercise the CD28 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 CD28 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  CD28
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 CD28 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  CD28  Co-Detailing  Option.    Xencor  may  exercise  the  CD28  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 CD28 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-

[***] = 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

Detailing  Option  Exercise  Date.”    If  Xencor  does  not  exercise  the  CD28  Co-Detailing  Option
before  such  date,  the  CD28  Co-Detailing  Option  will  not  apply  to  any  Licensed  CD28  Products
and the CD28 Co-Detailing Option will terminate.

6.3.3 Effect  of  Exercise  of  CD28  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 CD28 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  CD28  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.

6.3.3.2

Xencor will select its Detailing effort percentage and specify it in its
CD28  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
[***]  to  remedy  such  deficiencies.    Xencor  will  be  responsible  for  performing  its  elected
percentage of Detailing efforts.

6.3.3.3

Janssen may terminate the CD28 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  CD28  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  CD28  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: [***].

[***] = 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

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.

6.4
Diligence Obligations.  On and after the applicable dates set forth in Section 5.1.2.1 (or, if
this Agreement is terminated with respect to Plamotamab and Plamotamab Products in accordance
with Section 13.3.2, after the effective date of termination), one of Section 6.4.1, Section 6.4.2 or
Section 6.4.3 will apply as provided below.  

6.4.1 Diligence if CD28/Plamotamab Combination is Developed. If (a) Janssen provides
a [***] or (b) Janssen provides a Notice of 6.4.1 Application, then (in each of case (a) or (b)) the
following  provisions  of  this  Section  6.4.1  will  apply  on  and  after  the  date  of  such  notice,  and
Section 6.4.2 and Section 6.4.3 will not apply.  

6.4.1.1

CD28/Plamotamab Combination.  

(a)

Development.

(i)

Performance of Plamotamab Development Plan.  Each  Party
will  use  Diligent  Efforts  to  execute  and  to  perform,  or  cause  to  be  performed,  the  Development
activities in the Plamotamab Development Plan for which such Party is assigned responsibility in
this  Agreement  or  the  Plamotamab  Development  Plan,  in  accordance  with  the  timetables  in  the
Plamotamab Development Plan.  

(ii)

Contents of Plamotamab Development Plan.  The JDC (or, if
Janssen exercises its final decision-making authority under Section 2.5.1.3, Janssen) shall cause the
Plamotamab Development Plan to at all times reflect Commercially Reasonable Efforts to Develop
and  seek  Marketing  Approval  for  one  CD28/Plamotamab  Combination  for  one  Indication  in  the
U.S., each of the Major European Countries and Japan.

(b)

Commercialization. 

  Following  receipt  of  Commercialization
Approval of a CD28/Plamotamab Combination in the U.S., a Major European Country or Japan,
Janssen  will  use  Commercially  Reasonable  Efforts  to  Commercialize  a  CD28/Plamotamab
Combination in such country.  Subject to the preceding sentence, Janssen will have the sole right
and authority to make decisions regarding whether and when to launch a CD28/Plamotamab

[***] = 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.

65

Combination  in  a  particular  country  or  region  and  the  level  of  efforts  to  be  expended  in  any
particular country or region.  Janssen’s obligation under this Section 6.4.1.1(b) will terminate when
a biosimilar of both components of the applicable CD28/Plamotamab Combination launches in the
applicable country.  

6.4.1.2

Other  Plamotamab  Products.    For  so  long  as  this  Section  6.4.1
applies,  Janssen  will  have  no  obligation  to  Develop,  seek  Marketing  Approval  for  or
Commercialize Plamotamab or any Plamotamab Product as a single agent or in combination with
any product other than a Licensed CD28 Product.

6.4.1.3

Other  Licensed  CD28  Products.  For  so  long  as  this  Section  6.4.1
applies,  Janssen  will  have  no  obligation  to  Develop,  seek  Marketing  Approval  for  or
Commercialize any Licensed CD28 Antibody or any Licensed CD28 Product as a single agent or
in combination with any product other than a Plamotamab Product.

6.4.1.4

Janssen Election.  

(a)

Janssen Right to Elect;  Deemed  Election. Janssen may at any  time,
upon notice to Xencor, elect to have Section 6.4.2 apply in lieu of this Section 6.4.1, in which case
Section  6.4.2  will  apply  on  and  after  the  date  of  such  notice  (“Notice  of  6.4.2  Application”).   
[***].    If,  on  the  date  that  is  [***]  after  [***]  and  prior  to  First  CD28/Plamotamab  Marketing
Approval [***], then  Janssen  shall  be  deemed  to  provide  Notice  of  6.4.2  Application as of such
date (and, thereafter, Section 6.4.2 shall apply in lieu of this Section 6.4.1). [***].

(b)

Xencor  Concerns  Regarding  Performance  of  Plan.    If,  at  any  time,
Xencor  believes  that  Janssen  is  not  complying  with  its  obligations  under  Section  6.4.1.1(a)(i)
(Performance of Plamotamab Development Plan),  Xencor  may  (but  is  not  required  to)  request  a
meeting  with  Janssen  to  discuss  Xencor’s  concerns.    The  Parties  will  meet  within  [***]  after
Xencor’s  request  and  discuss  Xencor’s  concerns.   At  such  meeting,  Xencor  may  also  (but  is  not
required to) request Janssen to elect (in accordance with Section 6.4.1.4(a)) to have Section 6.4.2
apply in lieu of this Section 6.4.1.  For clarity, (x) Xencor’s exercise of its rights under this Section
6.4.1.4(b)  is  in  addition  to  its  rights  under  Section  13.3.2.2  (Breach  of  Plamotamab  Diligence
Obligations) and will be without prejudice to other remedies Xencor may have at law or equity, (y)
Janssen is not required to agree to Xencor’s request pursuant to this Section 6.4.1.4(b) to elect to
have Section 6.4.2 apply in lieu of this Section 6.4.1, and (z) this Section 6.4.1.4(b) does not limit
Section 6.4.1.4(a) in any way.

(c)

Xencor  Concerns  Regarding  Contents  of  Plan.    If,  at  any  time,
Xencor believes that the Plamotamab Development Plan does not comply with the requirements of
Section  6.4.1.1(a)(ii)  (Contents  of  Plamotamab  Development  Plan),  Xencor  may  (but  is  not
required  to)  request  a  special  meeting  of  the  JDC  and  submit  a  proposed  amendment  to  the
Plamotamab Development Plan to the JDC, in accordance with Section 5.1.1.3(f).  The JDC will
meet within [***] after such request (or, if later, [***] after Janssen receives Xencor’s proposed

[***] = 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

amendment).   The  JDC  will  discuss  such  proposal  at  the  special  meeting  and  decide  whether  to
approve  such  amendment.    For  clarity,  (x)  Xencor’s  exercise  of  its  rights  under  this  Section
6.4.1.4(c)  is  in  addition  to  its  rights  under  Section  13.3.2.2  (Breach  of  Plamotamab  Diligence
Obligations) and will be without prejudice to other remedies Xencor may have at law or equity, (y)
Janssen’s  JDC  representatives  are  not  required  to  vote  to  approve  such  amendment,  and,  if  the
matter  is  referred  to  the  Executive  Officers  in  accordance  with  Section  2.5.1.3,  the  Executive
Officer of Janssen is not required to agree to such amendment, and (z) this Section 6.4.1.4(c) does
not limit Section 6.4.1.4(a) in any way.

6.4.2 Diligence  if  no  CD28/Plamotamab  Combination  is  Developed.    If  (a)  Janssen
provides a [***] and such notice does not state that Janssen intends to proceed with Development
of  a  CD28/Plamotamab  Combination,  (b)  Janssen  provides  a  Notice  of  6.4.2  Application,  or  (c)
Janssen provides [***], then (in each case of (a), (b) or (c)) the following provisions of this Section
6.4.2 will apply on and after the date of such notice, and Section 6.4.1 and Section 6.4.3 will not
apply; provided, however, that Janssen may at any time thereafter (but prior to termination of this
Agreement  with  respect  to  the  Licensed  CD28  Antibodies  and  Licensed  CD28  Products  or  with
respect  to  Plamotamab  and  the  Plamotamab  Products),  upon  notice  to  Xencor,  elect  to  have
Section 6.4.1 apply in lieu of this Section 6.4.2, in which case Section 6.4.1 will apply on and after
the date of such notice (“Notice of 6.4.1 Application”).

6.4.2.1

Plamotamab Products.

(a)

Each  Party  will  use  Diligent  Efforts  to  execute  and  to  perform,  or
cause to be performed, the Development activities in the Plamotamab Development Plan for which
such Party is assigned responsibility in this Agreement or the Plamotamab Development Plan, in
accordance  with  the  timetables  in  the  Plamotamab  Development  Plan.    The  JDC  (or,  if  Janssen
exercises  its  final  decision-making  authority  under  Section  2.5.1.3,  Janssen)  shall  cause  the
Plamotamab Development Plan to at all times reflect Commercially Reasonable Efforts to Develop
and seek Marketing Approval for one Plamotamab Product for one Indication in the U.S., each of
the Major European Countries and Japan.

(b)

Following receipt of Commercialization Approval of a Plamotamab
Product  in  the  U.S.,  a  Major  European  Country  or  Japan,  Janssen  will  use  Commercially
Reasonable  Efforts  to  Commercialize  the  Plamotamab  Product  in  such  country.    Subject  to  the
preceding  sentence,  Janssen  will  have  the  sole  right  and  authority  to  make  decisions  regarding
whether and when to launch a Plamotamab Product in a particular country or region and the level
of efforts to be expended in any particular country or region.

6.4.2.2

Licensed CD28 Products.  

(a)

After the end of the Research Program Term, unless and until Xencor
exercises  the  CD28  Co-Funding  Option  in  accordance  with  Section  6.2,  Janssen  will  use
Commercially  Reasonable  Efforts  to  Develop  and  seek  Marketing  Approval  for  [***]  Licensed
CD28 Product for [***] Indication in the U.S., each of the Major European Countries and Japan.  

[***] = 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

[***].      [***].    If  [***],  then  Xencor  may  terminate  this  Agreement  solely  with  respect  to  the
Licensed CD28 Antibodies and Licensed CD28 Products by giving [***] notice to Janssen stating
the reason for such termination [***].      

(b)

After the end of the Research Program Term, if Xencor exercises the
CD28  Co-Funding  Option  in  accordance  with  Section  6.2,  then:  (i)  Section  6.4.2.2(a)  will  no
longer  apply;  (ii)  Janssen  will  use  Diligent  Efforts  to  execute  and  to  perform,  or  cause  to  be
performed,  the  Development  activities  in  the  CD28  Development  Plan,  in  accordance  with  the
timetables  in  the  CD28  Development  Plan;  and  (iii)  the  JDC  (or,  if  Janssen  exercises  its  final
decision-making authority under Section 2.5.1.3, Janssen) shall cause the CD28 Development Plan
to at all times reflect Commercially Reasonable Efforts to Develop and seek Marketing Approval
for  one  Licensed  CD28  Product  for  [***]  Indication  in  the  U.S.,  each  of  the  Major  European
Countries and Japan.     [***].  If [***], then Xencor may terminate this Agreement solely with
respect to the Licensed CD28 Antibodies and Licensed CD28 Products by giving [***] notice to
Janssen stating the reason for such termination [***].    

(c)

[***].  

(d)

Following  receipt  of  Commercialization  Approval  of  a  Licensed
CD28  Product  in  the  U.S.,  a  Major  European  Country  or  Japan,  Janssen  will  use  Commercially
Reasonable Efforts to Commercialize the Licensed CD28 Product in such country.  Subject to the
preceding  sentence,  Janssen  will  have  the  sole  right  and  authority  to  make  decisions  regarding
whether  and  when  to  launch  a  Licensed  CD28  Product  in  a  particular  country  or  region  and  the
level of efforts to be expended in any particular country or region.

6.4.3 Diligence  if  [***].    If  Janssen  provides  a  [***]  (or  this  Agreement  is  otherwise
terminated  with  respect  to  Plamotamab  and  Plamotamab  Products  in  accordance  with  Section
13.3.2), then the following provisions of this Section 6.4.3 will apply on and after the date of such
[***] (or termination), and Section 6.4.1 and Section 6.4.2 will not apply.  

6.4.3.1

After the end of the Research Program Term, unless and until Xencor
exercises  the  CD28  Co-Funding  Option  in  accordance  with  Section  6.2,  Janssen  will  use
Commercially  Reasonable  Efforts  to  Develop  and  seek  Marketing  Approval  for  [***]  Licensed
CD28 Product for [***] Indication in the U.S., each of the Major European Countries and Japan.  
 [***].  If [***], then Xencor may terminate this Agreement solely with respect to the Licensed
CD28 Antibodies and Licensed CD28 Products by giving [***] notice to Janssen stating the reason
for such termination [***].

6.4.3.2

After the end of the Research Program Term, if Xencor exercises the
CD28 Co-Funding Option in accordance with Section 6.2, then: (i) Section 6.4.3.1 will no longer
apply; (ii) Janssen will use Diligent Efforts to execute and to perform, or cause to be performed,
the  Development  activities  in  the  CD28  Development  Plan,  in  accordance  with  the  timetables  in
the CD28 Development Plan; and (iii) the JDC (or, if Janssen exercises its final decision-making
authority under Section 2.5.1.3, Janssen) shall cause the CD28 Development

[***] = 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

Plan  to  at  all  times  reflect  Commercially  Reasonable  Efforts  to  Develop  and  seek  Marketing
Approval  for  [***]  Licensed  CD28  Product  for  [***]  Indication  in  the  U.S.,  each  of  the  Major
European Countries and Japan.  [***].  If [***], then Xencor may terminate this Agreement solely
with respect to the Licensed CD28 Antibodies and Licensed CD28 Products by giving [***] notice
to Janssen stating the reason for such termination [***].

6.4.3.3

Following  receipt  of  Commercialization  Approval  of  a  Licensed
CD28  Product  in  the  U.S.,  a  Major  European  Country  or  Japan,  Janssen  will  use  Commercially
Reasonable Efforts to Commercialize the Licensed CD28 Product in such country.  Subject to the
preceding  sentence,  Janssen  will  have  the  sole  right  and  authority  to  make  decisions  regarding
whether  and  when  to  launch  a  Licensed  CD28  Product  in  a  particular  country  or  region  and  the
level of efforts to be expended in any particular country or region.

6.5
Preliminary  Licensed  CD28  Products  Diligence.    After  the  Research  Program  Term
ends, if none of Section 6.4.1, Section 6.4.2 or Section 6.4.3 applies as of the day after the last day
of the Research Program Term, then until the date that Section 6.4.1, Section 6.4.2 or Section 6.4.3
first applies:  

(a)

Unless and until Xencor exercises the CD28 Co-Funding Option in
accordance  with  Section  6.2,  Janssen  will  use  Commercially  Reasonable  Efforts  to  Develop  and
seek Marketing Approval for [***] Licensed CD28 Product for [***] Indication in the U.S., each
of  the  Major  European  Countries  and  Japan.    [***].        If  [***],  then  Xencor  may  terminate  this
Agreement solely with respect to the Licensed CD28 Antibodies and Licensed CD28 Products by
giving [***] notice to Janssen stating the reason for such termination [***].

(b)

If  Xencor  exercises  the  CD28  Co-Funding  Option  in  accordance
with Section 6.2, then (i) Janssen will use Diligent Efforts to execute and to perform, or cause to be
performed,  the  Development  activities  in  the  CD28  Development  Plan,  in  accordance  with  the
timetables  in  the  CD28  Development  Plan;  and  (ii)  the  JDC  (or,  if  Janssen  exercises  its  final
decision-making authority under Section 2.5.1.3, Janssen) shall cause the CD28 Development Plan
to at all times reflect Commercially Reasonable Efforts to Develop and seek Marketing Approval
for  one  Licensed  CD28  Product  for  one  Indication  in  the  U.S.,  each  of  the  Major  European
Countries  and  Japan.    [***].        If  [***],  then  Xencor  may  terminate  this  Agreement  solely  with
respect to the Licensed CD28 Antibodies and Licensed CD28 Products by giving [***] notice to
Janssen stating the reason for such termination [***].

ARTICLE 7
FINANCIAL PROVISIONS

Upfront  Payment.    Janssen  will  make  a  non-refundable,  non-creditable  payment  of

7.1
US$100 million to Xencor within 10 Business Days after the Effective Date.

7.2

Development and Regulatory Milestones.

69

[***] = 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.

7.2.1 CD28 Milestone Payments and Events.  Janssen will make the payments set forth in
the  table  below  (each,  a  “CD28  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 “CD28 Milestone Event”).  Janssen will notify Xencor within [***] after the
[***] occurrence of any of the CD28 Milestone Events.  [***]. A CD28/Plamotamab Combination
will be treated as a Licensed CD28 Product for purposes of this Section 7.2.1.

7.2.2 Plamotamab Development Decision Milestone.  Janssen will pay to Xencor [***].  

7.2.3 Plamotamab Milestone Payments and Events.  Janssen will make the payments set
forth in the table below (each, a “Plamotamab 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  “Plamotamab  Milestone  Event”).    Janssen  will  notify  Xencor
within [***] after the first occurrence of any of the Plamotamab Milestone Events. [***].  

7.2.4 Rules regarding Determination of Milestone Payments and Events.

7.2.4.1

The  CD28  Milestone  Payments,  payment  for  the  Development
Decision  Milestone  Event  and  Plamotamab  Milestone  Payments  under  this  Section  7.2  (each,  a
“Milestone Payment”) will be non-refundable and non-creditable.  Each Milestone Payment shall
be  payable  only  once  upon  the  first  occurrence  of  the  relevant  CD28  Milestone  Event,
Development  Decision  Milestone  Event  or  Plamotamab  Milestone  Event,  as  applicable  (each,  a
“Milestone Event”),  even  if  the  Milestone  Event  occurs  with  respect  to  more  than  one  Product,
with  respect  to  more  than  one  Indication,  multiple  times  with  respect  to  the  same  Product  or
multiple times with respect to the same Indication. [***].

7.3

Sales Milestones.

7.3.1 Category A Sales Milestones.  Janssen will notify Xencor in the applicable royalty
report  delivered  pursuant  to  Section  7.4.5  the  first  time  the  aggregate  Category  A  Net  Sales
(defined  below  in  Section  7.4.1.1)  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 “Category A Sales Milestone Event”); provided, however, that Net Sales of
a  particular  Product  in  a  particular  country  occurring  after  expiration  of  the  applicable  Royalty
Term  for  such  Product  in  such  country  will  be  disregarded  in  the  calculation  of  Category  A  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  “Category  A  Sales  Milestone  Payment”)  within
[***]  after  receipt  of  an  invoice  from  Xencor  with  respect  to  achievement  of  each  Category  A
Sales Milestone Event.  

[***] = 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

Category A Sales Milestone Event

Category A Sales
Milestone Payment

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

7.3.2 Category B Sales Milestones. Janssen will notify Xencor in the applicable royalty
report  delivered  pursuant  to  Section  7.4.5  the  first  time  the  aggregate  Category  B  Net  Sales
(defined  below  in  Section  7.4.1.1)  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 “Category B Sales Milestone Event”); provided, however, that Net Sales of
a  particular  Product  or  combination  in  a  particular  country  occurring  after  expiration  of  the
applicable  Royalty  Term  for  such  Product  or  regimen  in  such  country  will  be  disregarded  in  the
calculation of Category B 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  “Category  B  Sales
Milestone  Payment”)  within  [***]  after  receipt  of  an  invoice  from  Xencor  with  respect  to
achievement of each Category B Sales Milestone Event.    

Category B Sales Milestone Event

Category B 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

Category A and Category B Net Sales.  

71

[***] = 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)

“Category A Net Sales” means, with respect to a particular period,
the  aggregate  Net  Sales  of  all  Licensed  CD28  Products  in  such  period  excluding  (x)  Net  Sales
allocable  (under  the  definition  of  “Net  Sales”)  to  the  Licensed  CD28  Product  component  of
CD28/Plamotamab Combination Products in such period (and, for clarity, excluding the Net Sales
allocable  (under  the  definition  of  “Net  Sales”)  to  the  Plamotamab  Product  component  of
CD28/Plamotamab  Combination  Products)  and  (y)  Net  Sales  of  Licensed  CD28  Products  when
sold for use in a CD28/Plamotamab Combination Regimen in such period.  

(b)

“Category B Net Sales” means, with respect to a particular period,
the  sum  of  (x)  the  aggregate  Net  Sales  of  all  Plamotamab  Products  (not  including  Net  Sales  of
CD28/Plamotamab  Combination  Products)  in  such  period,  (y)  the  aggregate  Net  Sales  of
CD28/Plamotamab  Combination  Products  in  such  period  and  (z)  the  aggregate  Net  Sales  of
Licensed CD28 Products when sold for use in a CD28/Plamotamab Combination Regimen in such
period.  

(c)

For  clarity,  if  a  CD28/Plamotamab  Combination  Product  includes
any components that are not a Licensed CD28 Antibody, Licensed CD28 Product, Plamotamab or
a  Plamotamab  Product,  then  Net  Sales  of  such  Combination  Product  will  be  allocated  in
accordance with the definition of “Net Sales,” so that only the portion of such Net Sales allocable
to the Licensed CD28 Antibody, Licensed CD28 Product, Plamotamab or a Plamotamab Product
are included in Category B Net Sales.  

7.4.1.2

Category  A  Royalty  Rates  if  Xencor  does  not  Exercise  CD28  Co-
Funding Option.  If  Xencor  does  not  exercise  the  CD28  Co-Funding  Option  in  accordance  with
Section 6.2, this Section 7.4.1.2 will apply and Section 7.4.1.3 will not apply.  Subject to Section
7.4.2  through  Section  7.4.6,  Janssen  will  pay  to  Xencor  royalties  on  aggregate  Category  A  Net
Sales  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.
 Net Sales of a particular Product in a particular country occurring after expiration of the applicable
Royalty Term for such Product in such country will be disregarded in the calculation of royalties
pursuant to this Section 7.4.1.2.

Annual Aggregate Category A Net Sales in the Territory

Royalty Rate

For that portion of annual Category A Net Sales in the Territory in
such Calendar Year less than US$[***]

For that portion of annual Category A Net Sales in the Territory in
such Calendar Year greater than or equal to US$[***] and less than
US$[***]

[***]

[***]

[***] = 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

Annual Aggregate Category A Net Sales in the Territory

Royalty Rate

For that portion of annual Category A Net Sales in the Territory in
such Calendar Year greater than or equal to US$[***]

[***]

[***].

7.4.1.3

Category  A  Royalty  Rates  if  Xencor  Exercises  Option.    If  Xencor
exercises the CD28 Co-Funding Option in accordance with Section 6.2,  this  Section  7.4.1.3  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  aggregate  Category  A  Net  Sales  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  7.4.1.3.    Net  Sales  of  a  particular  Product  in  a
particular  country  occurring  after  expiration  of  the  applicable  Royalty  Term  for  such  Product  in
such country will be disregarded in the calculation of royalties pursuant to this Section 7.4.1.3.

Annual Aggregate Category A Net Sales in the Territory

Co-Funding
Royalty Rate

For that portion of annual Category A Net Sales in the Territory in
such Calendar Year less than US$[***]

For that portion of annual Category A Net Sales in the Territory in
such Calendar Year greater than or equal to US$[***] and less than
US$[***]

For that portion of annual Category A Net Sales in the Territory in
such Calendar Year greater than or equal to US$[***]

[***]

[***]

[***]

[***].  

7.4.1.4

Category  B  Royalty  Rates  –  U.S.    Subject  to  Section  7.4.2  through
Section 7.4.6, Janssen will pay to Xencor royalties on aggregate Category B Net Sales by Janssen,
its Affiliates and sublicensees during the applicable Royalty Term in the U.S. during each Calendar
Year at the rates set forth in the table below in this Section 7.4.1.4.  

[***] = 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.

73

 
Annual Aggregate Category B Net Sales in the U.S.

Royalty Rate

For that portion of annual Category B Net Sales in the U.S. in such
Calendar Year less than US$[***]

For that portion of annual Category B Net Sales in the U.S. in such
Calendar Year greater than or equal to US$[***] and less than
US$[***]

For that portion of annual Category B Net Sales in the U.S. in such
Calendar Year greater than or equal to US$[***]

[***]

[***]

[***]

7.4.1.5

Category B Royalty Rates – OUS Territory.  Subject to Section 7.4.2
through Section 7.4.6, Janssen will pay to Xencor royalties on aggregate Category B Net Sales by
Janssen,  its  Affiliates  and  sublicensees  during  the  applicable  Royalty  Term  in  the  OUS  Territory
during each Calendar Year at the rates set forth in the table below in this Section 7.4.1.5.  

Annual Aggregate Category B Net Sales in the OUS Territory

Royalty Rate

For that portion of annual Category B Net Sales in the OUS Territory
in such Calendar Year less than US$[***]

For that portion of annual Category B Net Sales in the OUS Territory
in such Calendar Year greater than or equal to US$[***]and less than
US$[***]

[***]

[***]

For that portion of annual Category B Net Sales in the OUS Territory
in such Calendar Year greater than or equal to US$[***]

[***]

Net Sales of a particular Product or combination in a particular country occurring after expiration
of  the  applicable  Royalty  Term  for  such  Product  or  combination  in  such  country  will  be
disregarded in the calculation of royalties pursuant to Section 7.4.1.4 and Section 7.4.1.5.

7.4.2 Royalty Terms.

7.4.2.1

Category A Product Royalty Term.  

Category  A  Product  Royalty  Term.    Royalties  will  be  paid  under
Section 7.4.1.2 and Section 7.4.1.3 on a Licensed CD28 Product-by-Licensed CD28 Product and
country-by-country basis, beginning with the First Commercial Sale of the relevant Product in a

(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.

74

country and ending on the later of: (i) the expiration of the last-to-expire Valid Claim of a CD28
Royalty-Bearing  Patent  with  respect  to  such  Product  in  the  country;  (ii)  the  expiration  of
Regulatory  Exclusivity  for  such  Product  in  the  country,  if  any;  or  (iii)  the  [***]  of  the  First
Commercial Sale of such Product in such country (the “CD28 Royalty Term”).  For purposes of
the  CD28  Royalty  Term,  a  Valid  Claim  of  a  CD28  Royalty-Bearing  Patent  that  Covers  the
composition  of  matter  of  a  Licensed  CD28  Product  means  any  Valid  Claim  of  a  CD28  Royalty-
Bearing Patent that Covers the composition of matter of the Licensed CD28 Antibody contained in
such Licensed CD28 Product, but does not include any Valid Claim of a CD28 Royalty-Bearing
Patent that Covers the composition of matter of a formulation that includes such Licensed CD28
Antibody.

(b)

Definitions.  

(i)

“CD28  Royalty-Bearing  Patent”  means,  with  respect  to  a
Licensed CD28 Product: (x) a Xencor Patent or Joint Patent that Covers the composition of matter
or any method of use of such Licensed CD28 Product (including any method of use or composition
of  matter  of  the  Licensed  CD28  Antibody  contained  in  such  Licensed  CD28  Product);  or  (y)  a
Patent  (other  than  a  B-Cell  Antigen  Variant  Specific  Patent)  Controlled  by  Janssen  or  any  of  its
Affiliates during the Term that Covers the composition of matter of the Licensed CD28 Antibody
contained in such Licensed CD28 Product.    

“B-Cell  Antigen  Variant  Specific  Patent”  means  a  Patent
that  Covers:  (x)  the  composition  of  matter  of  a  Janssen  B-Cell  Antigen  Variant  with  claim
limitations to a specified Janssen B-Cell Antigen Variant Binding Domain; or (y) the composition
of matter of a Janssen B-Cell Antigen Variant Binding Domain.  

(ii)

“Janssen B-Cell Antigen Variant Binding Domain” means
a Variant Binding Domain of a Janssen proprietary Target B-Cell Antigen Binding Domain that is
part of a Primary Antibody.  

(iii)

“Janssen  B-Cell  Antigen  Variant”  means  any  Bispecific
Antibody that comprises: (x) a Janssen B-Cell Antigen Variant Binding Domain; and (y) a CD28
Binding  Domain  that  is  part  of  a  Primary  Antibody  or  a  Variant  Binding  Domain  of  a  CD28
Binding Domain that is part of a Primary Antibody.  

(iv)

7.4.2.2

Category B Royalty Terms.  

(a)

CD28/Plamotamab 

Term.
“CD28/Plamotamab Combination Sales” means, with respect to a particular country (i) sales of
CD28/Plamotamab  Combination  Products  in  such  country,  (ii)  sales  of  Plamotamab  Products  in
such country when sold for use in a CD28/Plamotamab Combination Regimen, and (iii) sales of
Licensed CD28 Products in such country when sold for use in a CD28/Plamotamab Combination
Regimen.  For CD28/Plamotamab Combination Sales, royalties will be paid under Sections 7.4.1.4
and 7.4.1.5 on a CD28/Plamotamab Combination-by-CD28/Plamotamab

Combination 

Royalty 

[***] = 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.

75

Combination  and  country-by-country  basis,  beginning  with  the  First  Commercial  Sale  of  the
relevant  combination  in  a  country  and  ending  on  the  latest  of:  (w)  the  expiration  of  the  last-to-
expire Valid Claim of a Xencor Patent or Joint Patent that Covers the composition of matter or any
method  of  use  of  such  CD28/Plamotamab  Combination  or  the  Plamotamab  Product  or  the
Licensed CD28 Product contained in such CD28/Plamotamab Combination in the country; (x) the
expiration of the last-to-expire Valid Claim of a Royalty-Bearing Plamotamab Formulation Patent
that  Covers  the  formulation  of  the  Plamotamab  Product  contained  in  such  CD28/Plamotamab
Combination or such Plamotamab Product, as applicable, in the country (any Patent described in
clause (w) or clause (x), a “CD28/Plamotamab Combination Royalty-Bearing Patent”); (y) the
expiration  of  Regulatory  Exclusivity  for  the  later  of  such  Plamotamab  Product,  such  Licensed
CD28  Product,  or  combination  thereof,  in  the  country,  if  any;  or  (z)  the  [***]  of  the  First
Commercial  Sale  of  such  combination  in  such  country  (the  “CD28/Plamotamab  Combination
Royalty Term”).  For purposes of the clause (w) above, a Valid Claim of a Xencor Patent or Joint
Patent  that  Covers  the  composition  of  matter  of  a  CD28/Plamotamab  Combination,  Plamotamab
Product or Licensed CD28 Product means any Valid Claim of a Xencor Patent or Joint Patent that
Covers  the  composition  of  matter  of  the  Licensed  CD28  Antibody  and/or  the  Plamotamab
contained  in  such  CD28/Plamotamab  Combination,  Plamotamab  Product  or  Licensed  CD28
Product,  as  applicable,  but  does  not  include  any  Valid  Claim  of  a  Xencor  Patent  or  Joint  Patent
  that  Covers  the  composition  of  matter  of  a  formulation  that  includes  such  Licensed  CD28
Antibody and/or the Plamotamab.  “Royalty-Bearing Plamotamab Formulation Patent” means
a Xencor Patent or Joint Patent that Covers a formulation that includes Plamotamab and, as to such
formulation, such Patent claims priority to a filing made prior to the [***] of the Effective Date.    

(b)

Other  Category  B  Royalty  Term.  For  any  sales  of  Plamotamab
Products  other  than  CD28/Plamotamab  Combination  Sales,  royalties  will  be  paid  under  Section
7.4.1.4  and  7.4.1.5  on  a  Plamotamab  Product-by-Plamotamab  Product  and  country-by-country
basis, beginning with the First Commercial Sale of the relevant Product in a country and ending on
the latest of: (i) the expiration of the last-to-expire Valid Claim of a Xencor Patent or Joint Patent
that  Covers  the  composition  of  matter  or  any  method  of  use  of  such  Plamotamab  Product  in  the
country;  (ii)  the  expiration  of  the  last-to-expire  Valid  Claim  of  a  Royalty-Bearing  Plamotamab
Formulation Patent that Covers the formulation of the Plamotamab contained in such Plamotamab
Product  (any  Patent  described  in  clause  (i)  or  clause  (ii),  an  “Other  Plamotamab  Product
Royalty-Bearing Patent”); (iii) the expiration of Regulatory Exclusivity for such Product in the
country, if any; or (iv) the [***] of the First Commercial Sale of such Product in such country (the
“Other Plamotamab Product Royalty Term”).  For purposes of clause (i) above, a Valid Claim
of  a  Xencor  Patent  or  Joint  Patent  that  Covers  the  composition  of  matter  of  such  Plamotamab
Product means any Valid Claim of a Xencor Patent or Joint Patent that Covers the composition of
matter of the Plamotamab contained in such Plamotamab Product, but does not include any Valid
Claim of a Xencor Patent or Joint Patent  that Covers the composition of matter of a formulation
that includes the Plamotamab.  

7.4.2.3

Royalty  Term  and  Royalty-Bearing  Patent  Definitions.    As  used  in

this Agreement, “Royalty Term” means the CD28 Royalty Term, CD28/Plamotamab

[***] = 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.

76

Combination  Royalty  Term  or  the  Other  Plamotamab  Product  Royalty  Term;  and  “Royalty-
Bearing  Patent”  means  a  CD28  Royalty-Bearing  Patent,  CD28/Plamotamab  Combination
Royalty-Bearing Patent or Other Plamotamab Product Royalty-Bearing Patent.    

7.4.2.4

Certain Royalty Term Interpretation Rules.  

(a)

If  two  Licensed  CD28  Products  that  are  not  CD28/Plamotamab
Combination  Products  each  contain  the  same  Licensed  CD28  Antibody  as  its  only  active
ingredient,  such  products  will  be  considered  the  same  Licensed  CD28  Product  for  purposes  of
Sections  7.4.2.1  and  7.4.2.2.    For  example,  if  a  Licensed  CD28  Product  in  an  intravenous
formulation and another Licensed CD28 Product in a subcutaneous formulation each contain the
same Licensed CD28 Antibody as its only active ingredient, such products will be considered the
same Licensed CD28 Product for purposes of Sections 7.4.2.1 and 7.4.2.2.

If  two  Plamotamab  Products  that  are  not  CD28/Plamotamab
Combination Products each contain Plamotamab as its only active ingredient, such products will be
considered the same Plamotamab Product for purposes of Section 7.4.2.2.

(b)

(c)

If  two  Combination  Products  each  contain  the  same  active
ingredients (and no other active ingredients) (e.g., two CD28/Plamotamab Combination Products
each contain Plamotamab as an active ingredient and contain the same Licensed CD28 Antibody as
an active ingredient), such products will be considered the same Combination Product for purposes
of Sections 7.4.2.1 and 7.4.2.2.

(d)

If  two  Combination  Regimens  each  contain  the  same  drugs  or
biological  products  (and  no  other  drugs  or  biological  products)  (e.g.,  two  CD28/Plamotamab
Combination Regimens each include the same Plamotamab Product and the same Licensed CD28
Product),  such  regimens  will  be  considered  the  same  Combination  Regimen  for  purposes  of
Section 7.4.2.2.

7.4.2.5

Allocation of Category A and Category B Net Sales in Certain Non-
Copack Countries if no approved use of Plamotamab other than CD28/Plamotamab Combination.
If in a particular country in a particular period:

(i)  a  CD28/Plamotamab  Combination  Regimen  has  received  Marketing

Approval in a country;

(ii)  the  same  Licensed  CD28  Product  that  is  a  component  of  such
CD28/Plamotamab Combination Regimen (the “CD28 Component”) has received
Marketing Approval in such country for use either in a Combination Regimen that
is not a CD28/Plamotamab Combination Regimen, or for use as a single agent; 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.

77

(iii) the Plamotamab Product that is a component of such CD28/Plamotamab
Combination  Regimen  (the  “Plamotamab  Component”)  has  not  received
Marketing Approval in such country for any other use or Indication;

then  the  aggregate  Net  Sales  of  the  CD28  Component  and  the  aggregate  Net  Sales  of  the
Plamotamab  Component  (the  “Total  CD28/Plamotamab  Net  Sales”)  in  such  country  in  such
period will be allocated between Category A Net Sales and Category B Net Sales as follows:

(a)

Determine the total number of units of the CD28 Component sold in
such country during such period (the “Number of CD28 Units”) and the total number of units of
the  Plamotamab  Component  sold  in  such  country  during  such  period  (the  “Number  of
Plamotamab Units”).

(b)

If the Number of CD28 Units is less than or equal to the Number of
Plamotamab  Units,  then  100%  of  the  Total  CD28/Plamotamab  Net  Sales  in  such  country  during
such  period  will  be  included  in  Category  B  Net  Sales,  and  royalties  on  sales  of  such  CD28
Components and Plamotamab Components will be paid for such period in accordance with Section
7.4.1.4 (if such country is the U.S.) or Section 7.4.1.5 (if such country is in the OUS Territory).

of Plamotamab Units, then calculate:

(c)

Otherwise, if the Number of CD28 Units is greater than the Number

  “CD28  Unit  Price,”  which  equals  (i)  the  aggregate  Net
Sales of the CD28 Component in such country in such period divided by (ii) the Number of CD28
Units;

(i)

 “Adjusted Combination Net Sales Amount,” which equals
the  sum  of  A  and  B,  where  A  equals  the  aggregate  Net  Sales  of  the  Plamotamab  Component  in
such country in such period and B equals (i) the Number of Plamotamab Units multiplied by (ii)
the CD28 Unit Price;

(ii)

“Remaining  Net  Sales  Amount,”  which  equals  (x)  Total
CD28/Plamotamab Net Sales in such country in such period, minus (y) the Adjusted Combination
Net Sales Amount.

(iii)

Plamotamab Components will then be paid as follows:

(iv)

Royalties  on  sales  of  such  CD28  Components  and

The Adjusted Combination Net Sales Amount
will  be  included  in  Category  B  Net  Sales  under  Section  7.4.1.4  (if  such  country  is  the  U.S.)  or
Section 7.4.1.5 (if such country is in the OUS Territory); 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.

78

The  Remaining  Net  Sales  Amount  will  be
included in Category A Net Sales under Section 7.4.1.2 (if Xencor has not exercised the CD28 Co-
Funding Option) or Section 7.4.1.3 (if Xencor has exercised the CD28 Co-Funding Option).

(2)

7.4.2.6

Allocation of Category A and Category B Net Sales in Certain Non-
Copack  Countries  if  more  than  one  approved  use  of  Plamotamab.  If  in  a  particular  country  in  a
particular period:

(i)  a  CD28/Plamotamab  Combination  Regimen  has  received  Marketing

Approval in a country; and

(ii) the CD28 Component of such CD28/Plamotamab Combination Regimen
has received Marketing Approval in such country for use either in a Combination
Regimen  that  is  not  a  CD28/Plamotamab  Combination  Regimen,  or  for  use  as  a
single agent; and

(iii)  the  Plamotamab  Component  of  such  CD28/Plamotamab  Combination
Regimen  has  received  Marketing  Approval  in  such  country  for  use  either  in  a
Combination  Regimen  that  is  not  a  CD28/Plamotamab  Combination  Regimen,  or
for use as a single agent.

then Janssen will fairly and equitably allocate Net Sales of the CD28 Component and Plamotamab
Component among the approved uses.  Janssen will submit its allocation methodology to the JFC
and if the JFC does not agree with such methodology, then the JFC will discuss and approve an
alternate methodology.  If the JFC does not approve an alternate methodology within [***], then
either  Party  may  refer  the  matter  for  resolution  by  an  Expert  Panel    in  accordance  with  the
procedures set forth in Section 2.5.1.5 [***].

7.4.3 Royalty Reductions; Third Party Royalty Payments.

7.4.3.1

Reductions for Loss of Exclusivity.

(a)

CD28  Product  Exclusivity.    On  a  country-by-country  and  Product-
by-Product basis, the royalties due to Xencor under Section 7.4.1.2 or 7.4.1.3,  as  applicable,  will
be reduced during the CD28 Royalty Term to an amount equal to [***] of the amount otherwise
payable on Net Sales of a Licensed CD28 Product in such country from and after the later of (i) the
date that there is no Valid Claim of a CD28 Royalty-Bearing Patent with respect to such Licensed
CD28 Product in the country or (ii) if any Regulatory Exclusivity is granted with respect to such
Licensed CD28 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.

CD28/Plamotamab  Combination  Exclusivity.  On  a  country-by-
country and combination-by-combination basis, the royalties due to Xencor under Section 7.4.1.4
or 7.4.1.5, as applicable, will be reduced during the CD28/Plamotamab Combination

(b)

[***] = 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

Royalty  Term  to  an  amount  equal  to  [***]  of  the  amount  otherwise  payable  on  Net  Sales  of  a
CD28/Plamotamab Combination 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  that  Covers  the  composition  of  matter  or  any
method  of  use  of  such  CD28/Plamotamab  Combination  or  the  Plamotamab  Product  or  the
Licensed CD28 Product contained in such CD28/Plamotamab Combination in the country or (ii) if
any  Regulatory  Exclusivity  is  granted  with  respect  to  such  CD28/Plamotamab  Combination  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.

(c)

Other  Plamotamab  Product  Exclusivity.    On  a  country-by-country
and  Product-by-Product  basis,  the  royalties  due  to  Xencor  under  Section  7.4.1.4  or  7.4.1.5,  as
applicable,  will  be  reduced  during  the  Other  Plamotamab  Product  Royalty  Term  to  an  amount
equal  to  [***]  of  the  amount  otherwise  payable  on  Net  Sales  of  a  Plamotamab  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  that  Covers  the  composition  of  matter  or  any  method  of  use  of  such  Plamotamab
Product or (ii) if any Regulatory Exclusivity is granted with respect to such Plamotamab 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 CD28 Antibody, Licensed CD28 Product (other than with respect to any
active  ingredient  that  is  not  a  Licensed  CD28  Antibody),  Plamotamab  or  Plamotamab  Product
(other  than  with  respect  to  any  active  ingredient  that  is  not  Plamotamab)  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  Antibody  or  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  CD28  Antibodies,
Licensed CD28 Products, Plamotamab or Plamotamab Products.

(i)

With  respect  to  such  Patents  or  Know-How  [***]  for  the
manufacture, use or sale of a Licensed CD28 Antibody, Licensed CD28 Product, Plamotamab or
Plamotamab 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  Product  (including  a  Combination  Product  containing  such  Product,
Licensed CD28 Antibody or Plamotamab) in such country in a Calendar Quarter from the royalty
payments payable by Janssen to Xencor with respect to Net Sales of such Product (or Combination
Product  containing  such  Product,  Licensed  CD28  Antibody  or  Plamotamab)  in  such  country  in
such Calendar Quarter.

[***] = 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.

80

(ii) With  respect  to  such  Patents  or  Know-How  [***]  for  the
manufacture, use or sale of a Licensed CD28 Antibody, Licensed CD28 Product, Plamotamab or
Plamotamab Product (e.g. formulation 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 Product (including
a Combination Product containing such Product, Licensed CD28 Antibody or Plamotamab) in such
country  in  a  Calendar  Quarter  from  the  royalty  payments  payable  by  Janssen  to  Xencor  with
respect to Net Sales of such Product (including a Combination Product containing such Product,
Licensed CD28 Antibody or Plamotamab) 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  CD28  Antibody  (including  for  a  Licensed  CD28  Antibody
contained  in  a  Licensed  CD28  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  CD28  Antibody  (including  for  a  Licensed  CD28  Antibody
contained  in  a  Licensed  CD28  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.

For  clarity,  in  accordance  with  Section  11.11.2(e),  Xencor  will  be
solely  responsible  for  making  all  payments  that  become  due  under  any  Existing  Third  Party
Agreement.

(d)

7.4.3.3

 Royalty Floors.  

81

[***] = 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)

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  7.4.1.2  or
Section 7.4.1.3, as applicable, with respect to a given Licensed CD28 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.

(b)

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  7.4.1.4  or
Section 7.4.1.5, as applicable, with respect to a given CD28/Plamotamab Combination 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.

(c)

  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  7.4.1.4  or
Section  7.4.1.5,  as  applicable,  with  respect  to  a  given  Plamotamab  Product  (other  than  a
CD28/Plamotamab Combination) 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 Product (including as a Combination Product or part of a Combination Regimen) 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  Product  in  such
country  during  such  Calendar  Quarter  that  occurred  during  the  applicable  Royalty  Term  (the
“Quarterly Net Sales”).

(a)

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)

(i)

A  =  Aggregate  amount  of  royalties  payable  under  Section
7.4.1.2, 7.4.1.3, 7.4.1.4 or 7.4.1.5, as applicable, applying the relevant royalty tiers, on aggregate
annual Category A Net Sales or Category B Net Sales, as the case may be, 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

B  =  Aggregate  annual  Category  A  Net  Sales  or  Category  B
Net Sales, as the case may be, in the Territory during such Calendar Quarter (excluding any Net
Sales of such Products that occurred after the expiration of the applicable Royalty Term).

(ii)

Third, multiply the Effective Royalty Rate by the Net Sales of such
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

(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.

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Section 7.4.1.2, 7.4.1.3, 7.4.1.4 or 7.4.1.5, 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)

Example royalty calculations are attached hereto as Exhibit 7.4.3.4.

7.4.4 Expiration of Royalty Term.  

7.4.4.1

Upon  the  expiration  of  the  CD28  Royalty  Term  with  respect  to  a
Licensed  CD28  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 CD28 Product in the Field in such
country.  For clarity, this license does not grant any right or license under any Patent that Covers
any  composition  of  matter  of  any  Antibodies  or  other  active  ingredients  other  than  the  Licensed
CD28 Antibody contained in such Licensed CD28 Product.

7.4.4.2

Upon the expiration of the CD28/Plamotamab Combination Royalty
Term  with  respect  to  a  CD28/Plamotamab  Combination  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  and  Xencor  Plamotamab
Intellectual Property, to Exploit such CD28/Plamotamab Combination in the Field in such country.
  For  clarity,  this  license  does  not  grant  any  right  or  license  under  any  Patent  that  Covers  any
composition of matter of any Antibodies or other active ingredients other than the Licensed CD28
Antibody and Plamotamab contained in such CD28/Plamotamab Combination.

7.4.4.3

Upon the expiration of the Other Plamotamab Product Royalty Term
with  respect  to  Plamotamab  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  Plamotamab  Intellectual  Property,  to  Exploit  such  Plamotamab
Product in the Field in such country.  For clarity, this license does not grant any right or license
under  any  Patent  that  Covers  any  composition  of  matter  of  any  Antibodies  or  other  active
ingredients other than the Plamotamab contained in such Plamotamab Product.

7.4.4.4

For clarity, after the applicable Royalty Term expires with respect to
a Product, combination or regimen in a country, the calculation of annual aggregate Net Sales of
the  corresponding  Products  in  the  Territory  will  exclude  sales  of  such  Products  in  such  country
(but, in the case of a regimen or combination, only to the extent the Royalty Term for such regimen
or combination has also expired).

7.4.5 Royalty  Reports  and  Payments.    Commencing  with  the  First  Commercial  Sale  of

any Licensed CD28 Product, CD28/Plamotamab Combination or other Plamotamab Product by

[***] = 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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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
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 Affiliate’s
Net Sales to the first independent Third Party, and distributors of Janssen selling Licensed CD28
Product,  CD28/Plamotamab  Combination  or  other  Plamotamab  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  for  each
Calendar Quarter in the applicable Calendar Year.

7.6

Records; Audits.

7.6.1 Records.

[***] = 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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  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  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.

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
[***] 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.

[***] = 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

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.

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.

86

[***] = 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.

8.1.1.1

Research  License  for  Licensed  CD28  Antibodies.    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 CD28 Antibodies in the Field in the
Territory (the “Research License”).

8.1.1.2

Commercial  License  for  Licensed  CD28  Antibodies  and  Licensed
CD28 Products.  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  CD28  Antibodies  and  Licensed  CD28  Products  (including,  to  the  extent
Janssen  is  granted  a  license  to  Plamotamab  and  Plamotamab  Products  under  Section  8.1.1.3,
CD28/Plamotamab  Combinations)  in  the  Field  in  the  Territory.    Janssen  shall  not  Develop,
Manufacture  or  Commercialize  during  the  Term  (i)  any  Licensed  CD28  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  CD28  Product  containing  a
Licensed CD28 Antibody described in clause (i).

8.1.1.3

License for Plamotamab  and  Plamotamab  Products.  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 Plamotamab Intellectual Property, to Exploit (but not to Research) Plamotamab
and Plamotamab Products (including, to the extent Janssen is granted a license to Licensed CD28
Antibodies and Licensed CD28 Products under Section 8.1.1.2, CD28/Plamotamab Combinations)
in the Field in the Territory.    

8.1.1.4

Other  Antibodies  and  APIs.    Notwithstanding  anything  to  the

contrary:

(a)

the  licenses  granted  by  Xencor  to  Janssen  under  this  Section  8.1.1
with  respect  to  Licensed  CD28  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  CD28  Antibodies  and,  to  the  extent  Janssen  is  granted  a  license  to  Plamotamab  and
Plamotamab Products under Section 8.1.1.3, Plamotamab; and

(b)

the  licenses  granted  by  Xencor  to  Janssen  under  this  Section  8.1.1
with respect to Plamotamab 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  Plamotamab
and, to the extent Janssen is granted a license to Licensed CD28 Antibodies under Section 8.1.1.1
and Section 8.1.1.2, Licensed CD28 Antibodies.

[***] = 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.

87

8.1.2 Licenses to Xencor.  

8.1.2.1

Research License for Licensed CD28 Antibodies. 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.

8.1.2.2

License  for  Plamotamab  and  Plamotamab  Products.  Subject  to  the
terms and conditions of this Agreement, Janssen, on behalf of itself and its Affiliates, hereby grants
to  Xencor,  during  the  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 the Xencor
Plamotamab  Intellectual  Property  licensed  to  Janssen  under  Section  8.1.1,  solely  to  the  extent
necessary  for  Xencor  to  perform  its  obligations  under  this  Agreement  with  respect  to  the
Plamotamab Development Plan and to conduct Independent Plamotamab/Tafa Studies to the extent
permitted under Section 5.1.3.

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 CD28 Antibody,
Licensed CD28 Product, Plamotamab or Plamotamab 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 CD28 Antibody,
Licensed CD28 Product, Plamotamab or Plamotamab 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

[***] = 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

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  CD28  Antibody,  Licensed  CD28  Product,
Plamotamab  or  Plamotamab  Product  or  (ii)  a  grant  of  any  rights  to  practice,  other  than  Janssen
Assigned Inventions, any Patents or Know-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

[***] = 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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sensitive terms to the extent such terms are not necessary for the other Party to confirm compliance
with this Agreement.

8.3
No Implied Licenses.  Neither Party grants to the other Party any rights or licenses in or
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 [***].

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

“Research Competing Product” means [***].

8.4.1.6

“Scale-Up”  means,  with  respect  to  a  Licensed  CD28  Product,  that
such  Licensed  CD28  Product  has  been  successfully  produced  by  or  on  behalf  of  Janssen  or  its
Affiliates in a [***] that is at least [***] in volume.  

8.4.1.7

“Second Exclusivity Period” means the period beginning [***] and

ending on the earlier of (i) the last day of the Term or (ii) [***].

8.4.1.8

[***].  

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  Research  Competing  Product  in  the  Field  in  the
Territory, except for use of Research 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.

[***] = 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

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
or  Research  Competing  Product  that  would  otherwise  be  prohibited  under  Section  8.4.2  (an
“Acquirer Competing Product”), [***].

8.4.5.2

[***].  

8.4.5.3

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 or Research Competing Product (each an “Acquired 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  Acquired  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 Acquired 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:  

[***] = 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.

91

 
Acquired 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 Acquired
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 Acquired 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 Acquired 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  or
Xencor  Plamotamab  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  or  Xencor  Plamotamab  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 or Xencor Plamotamab Intellectual Property under this Section 8.4.7.

8.4.8 Existing  Third  Party  Agreements.    Janssen  agrees  (and  shall  cause  each  of  its
sublicensees  to  agree)  to  comply  with  the  terms  of  the  Existing  Third  Party  Agreements  to  the
extent  set  forth  on  Schedule  8.4.8.    Janssen  acknowledges  that  Xencor’s  licenses  to  Xencor
Plamotamab  Intellectual  Property  under  the  Existing  Third  Party  Agreements  may  be  non-
exclusive  according  to  the  terms  of  the  Existing  Third  Party  Agreements.    Accordingly,
notwithstanding anything to the contrary in this Agreement, (a) the sublicenses granted to Janssen
under  this  Agreement  with  respect  to  such  Xencor  Plamotamab  Intellectual  Property  are  non-
exclusive and (b) Xencor’s obligations and Janssen’s rights under ARTICLE 9 with respect to such
Patents  are  limited  (and  subject  to)  Xencor’s  rights  under  the  applicable  Existing  Third  Party
Agreements.    Specifically,  as  described  in  the  Novartis  Side  Letter,  certain  Xencor  Plamotamab
Patents are co-owned between Novartis Institutes For Biomedical Research, Inc. (“Novartis”) and,
notwithstanding  anything  in  ARTICLE  9,  Xencor’s  obligations  and  Janssen’s  rights  under
ARTICLE 9 with respect to such Patents are limited (and subject to) Xencor’s Prosecution rights
set forth in the Novartis Side Letter.

ARTICLE 9
INTELLECTUAL PROPERTY

Patent  Representatives.    Each  Party  will  designate  a  patent  attorney  or  agent  as  its
9.1
contact  to  coordinate  with  the  other  Party  the  filing,  prosecution  and  maintenance  of  Patents  as
provided in this Article (the “Patent Representative”).

[***] = 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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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.

9.2.2.4

All inventions disclosed on Schedule 9.2.2.4 will be jointly owned by
Janssen  and  Xencor  and  shall  be  considered  Joint  Inventions  for  all  purposes  of  this  Agreement
(even  though  such  inventions  are  not  Inventions).    Each  Party  hereby  makes  all  assignments
necessary to accomplish such ownership.  

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

[***] = 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.

93

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  Plamotamab  Patents,  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  Plamotamab  Patents,  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  Plamotamab  Patents,  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: (a) [***] effective for market exclusivity of Licensed CD28
Products;  and  (b)  [***]  effective  for  market  exclusivity  of  Plamotamab  Products.    As  of  the
Effective Date, Xencor uses certain external patent counsel to Prosecute Xencor B-Cell Antigen x
CD28 Patents and Plamotamab Antibody Patents.  In the event that such external patent counsel
are effectively replaced by Xencor, the replacement patent counsel must be reasonably acceptable
to Janssen.  

[***] = 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.

94

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:  (1)  with
respect to [***]: (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 such [***] 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; and (2)
with  respect  to  [***]:  (A)  after  [***],  Janssen  will  have  final  decision-making  authority  and
Xencor will (and will cause its outside counsel to) Prosecute such [***] 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 [***]; 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.

[***] = 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.

95

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.

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.

(a)

(b)

[***].

[***].

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 Plamotamab Patent, 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

[***] = 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.

96

respect  to  Plamotamab  or  any  Plamotamab  Product  or  any  Licensed  CD28  Antibody  or  any
Licensed  CD28  Product  (as  applicable),  or  if  any  Xencor  Plamotamab  Patent,  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 Plamotamab or Plamotamab Product or
Licensed  CD28  Antibody  or  Licensed  CD28  Product  (as  applicable)),  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:  (a)  with  respect  to  Plamotamab  or  a
Plamotamab  Product,  any  Antibody  containing  a  CD20  Binding  Domain  and  CD3  Binding
Domain;  and  (b)  with  respect  to  a  Licensed  CD28  Antibody  or  Licensed  CD28  Product,  any
Antibody containing a CD28 Binding Domain and a Selected B-Cell 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  CD28  Product  or  Plamotamab  Product  (as  applicable))  (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 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

[***] = 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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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.

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  CD28  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 [***], 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 first 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.  If  Janssen  does  not  institute  or  undertake  such  an
Infringement Action 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 at Xencor’s sole cost and expense.  With
respect to a [***] and 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.

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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

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.

Patent Term Extensions.    Janssen  will  have  the  sole  discretion,  after  consultation  with
9.5
Xencor, to determine which [***], if any, are extended with respect to any Licensed CD28 Product
or Plamotamab Product (as the case may be) pursuant to the U.S. Drug Price

[***] = 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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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  CD28  Product  or  Plamotamab  Product  (as  the  case  may  be),  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 CD28 Products or Plamotamab Products (as the case may be) 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.

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.  

[***] = 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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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 Plamotamab or a Plamotamab Product or any
Licensed CD28 Antibody  or  a  Licensed  CD28  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 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, Xencor Intellectual Property and Xencor Plamotamab Intellectual Property Controlled by
Xencor  immediately  before  the  consummation  of  the  Change  of  Control  shall  continue  to  be
Xencor  Research  Intellectual  Property,  Xencor  Intellectual  Property  or  Xencor  Plamotamab
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.

9.9.2 Notwithstanding  anything  to  the  contrary  in  this  Agreement,  Xencor  Research
Intellectual  Property,  Xencor  Intellectual  Property  and  Xencor  Plamotamab  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  CD28  Antibody,  Licensed  CD28  Product,  Plamotamab  or  Plamotamab
Product 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.

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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  CD28  Products  and  Plamotamab  Products  (including  any  CD28/Plamotamab
Combinations)  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, internal management and
operations  directly  related  to  this  Agreement  or,  in  the  case  of  Janssen,  in  connection  with  the
making of voting or investment decisions with respect to the shares of Xencor acquired by Janssen
or its Affiliate (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  CD28  Antibodies
generated  by  either  Party  in  the  performance  of  the  Research  Program  activities  under  this
Agreement (“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

[***] = 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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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 13.5.2.2.

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)

Authorized Disclosure.   The  Receiving  Party  may  disclose  Confidential  Information  of
10.3
the  Disclosing  Party  only  to  the  extent  such  disclosure  is  reasonably  necessary  in  the  following
instances:

permitted by this Agreement;

(a)

filing,  prosecuting,  maintaining,  enforcing  or  defending  Patents  as

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.

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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 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

[***] = 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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portions of this Agreement or such terms or information, as may be reasonably requested by the
other Party in a timely manner.

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 [***]
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 CD28 Product or a Plamotamab 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

[***] = 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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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,
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 [***], 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  Licensed  CD28  Antibodies,  Licensed  CD28
Products,  Plamotamab  and  Plamotamab  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  Licensed  CD28  Antibodies,
Licensed CD28 Products, Plamotamab and Plamotamab 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

[***] = 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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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  Licensed  CD28  Antibodies,  Licensed  CD28  Products,  Plamotamab  and
Plamotamab 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 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).

Additional Representations and Warranties of Xencor for Licensed CD28 Products.

11.5
 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  CD28  Antibodies  and  Licensed  CD28  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  CD28  Antibodies  or  Licensed  CD28  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

[***] = 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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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.

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  CD28  Antibodies  and  Licensed  CD28
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 CD28 Antibodies or Licensed CD28 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

[***] = 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.

108

(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 CD28
Antibodies or Licensed CD28 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  CD28
Antibodies  and  Licensed  CD28  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  Binding  Domain  which  binds  any  epitope  of  a  Research  B-Cell
Antigen and a CD28 Binding Domain or any product that contains such an Antibody, except to the
extent  that  Xencor  disclosed  in  writing  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 CD28 Antibodies or Licensed CD28 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  CD28
Antibodies or Licensed CD28 Products. No clinical trial of any Licensed CD28 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 CD28 Antibody or Licensed CD28 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 any Governmental Authority.

Notwithstanding  the  foregoing,  Xencor  makes  no  representations  or  warranties  (and  none  of  the
foregoing representations and warranties shall apply) with respect to any Licensed CD28 Antibody
disclosed in Schedule 1.64 or any activities with respect thereto except to the extent the breach of
such  representation  or  warranty  relates  to  Xencor’s  use  or  incorporation  of  a  Xencor  Binding
Domain  or  Xencor  Research  Intellectual  Property  in  such  antibody  or  to  Janssen’s  use  or
incorporation of a Xencor Binding Domain in such 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.

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11.6
 Xencor represents and warrants to Janssen that, as of the Execution Date:  

Additional  Representations  and  Warranties  of  Xencor  for  Plamotamab  Products.

11.6.1 Except  for  the  Existing  Third  Party  Agreements  set  forth  on  Schedule  11.6.1,
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  for  the  practice  of  any  intellectual  property  rights  with
respect  to  (a)  Xencor’s  (or  their  respective  Affiliates’)  Exploitation  of  Primary  Plamotamab  and
Plamotamab  Products  existing  as  of  the  Execution  Date  (“Primary  Plamotamab  Products”)  or
(b) the Parties’ Exploitation of Plamotamab and Plamotamab Products as expressly contemplated
by the Initial Development Activities.

11.6.2 The  Existing  Third  Party  Agreements  constitute  all  agreements  pursuant  to  which
Xencor  has  licensed  rights  with  respect  to  Primary  Plamotamab,  Primary  Plamotamab  Products
and the Xencor Plamotamab Intellectual Property that is both: (a) licensed to Janssen hereunder;
and  (b)  necessary  to  (i)  Exploit  Primary  Plamotamab  and  Primary  Plamotamab  Products  or  (ii)
Exploit  Plamotamab  and  Plamotamab  Products  as  expressly  contemplated  by  the  Initial
Development  Activities.    Xencor  has  provided  Janssen  with  a  copy  of  each  such  Existing  Third
Party Agreement as well as all other material agreements related to Primary Plamotamab Products
existing  as  of  the  Execution  Date.    Xencor  has  not  received  any  written  notice  that  it  is  not  in
compliance with the terms of any such agreement.  

11.6.3 Xencor,  together  with  its  Affiliates,  are  the  sole  and  exclusive  owners  of,  or
otherwise Control, the Xencor Plamotamab Intellectual Property.  Xencor has all rights necessary
to grant the licenses under the Xencor Plamotamab Intellectual Property that it grants to Janssen in
this Agreement.

11.6.4 Xencor has not previously (i) licensed, assigned, transferred, or otherwise conveyed
any  right,  title  or  interest  in,  to  or  under  the  Patents  that  are  Xencor  Plamotamab  Intellectual
Property,  or  (ii)  otherwise  granted  any  rights,  in  each  case,  to  any  Third  Party  in  any  way  that
would legally conflict with the licenses and rights granted to Janssen under this Agreement.

11.6.5 Except to the extent set forth in the Novartis Agreements, Xencor has not entered
into  any  agreement  that  would  create  a  lien,  charge  or  encumbrance  with  respect  to  the  Xencor
Plamotamab Patents, and the Xencor Plamotamab 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 11.6.5.

11.6.6 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 Plamotamab and Plamotamab Products by Xencor as of the
Execution Date, or (ii) the Xencor Plamotamab Know-How, in each case from any Third

[***] = 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.

110

Party,  and  Xencor  is  not  aware  of  any  claim  by  a  Third  Party  that  such  misappropriation  has
occurred.

11.6.7 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 Plamotamab Intellectual
Property (other than patent office actions or the actions of any Regulatory Authority) that have not
already been disclosed to Janssen.

11.6.8 Except as already disclosed to Janssen in writing (including, without limitation, in
any public securities filing), Xencor has no knowledge of, and has not received written notice from
a  Third  Party  claiming  that,  any  patent  owned  by  a  Third  Party  would  be  infringed  by  the
manufacture,  use,  sale,  offer  for  sale  or  import  of  Plamotamab  or  Plamotamab  Products  in  the
Territory, and no Third Party has threatened to make any such claim.

11.6.9 To  Xencor’s  knowledge,  except  as  already  disclosed  to  Janssen  in  writing
(including,  without  limitation,  in  any  public  securities  filing),  the  use,  practice  or  application  by
Xencor or Janssen (or their respective Affiliates or sublicensees) of any of the Xencor Plamotamab
Intellectual Property as contemplated by the Initial Development Activities does not infringe any
claim  of  an  issued  and  unexpired  patent  of  any  Third  Party  or  misappropriate  the  intellectual
property of any Third Party.

11.6.10The Patents listed in Schedule 11.6.10 represent all Patents that Xencor or any of its
Affiliates owns or Controls that Cover or disclose any invention necessary or used by Xencor for
the Exploitation of Plamotamab Products utilized therein as of the Execution Date.  Xencor: (i) is
not  aware  of  any  claim  made  against  it  asserting  the  invalidity,  misuse,  unregisterability,
unenforceability or non-infringement of any of 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 listed Patents or making any adverse claim of ownership of the
rights of Xencor to listed Patents.

11.6.11 Except as set forth on Schedule 11.6.11, Xencor has not prepared, filed or obtained
any INDs/CTAs, Drug Approval Applications or any other regulatory documentation or regulatory
licenses for Plamotamab or any Plamotamab Products in any jurisdiction. Xencor has conducted,
and has used reasonable efforts to cause its contractors and consultants to conduct, the Research,
Development  and  Manufacture  of  Plamotamab  and  Plamotamab  Products  in  accordance  in  all
material respects with applicable Law, professional scientific standards, accepted ethical standards,
including  as  applicable  GCP  and  GLP,  and  applicable  experimental  protocols,  procedures  and
controls.  

11.6.12  Xencor has made available to Janssen all material information in Xencor’s or its
Affiliate’s  control  relating  to  the  Research,  Development  and  Manufacture  of  Plamotamab  and
Plamotamab  Products  as  conducted  by  or  on  behalf  of  Xencor  prior  to  the  Execution  Date,
including complete and correct copies of the following, if any: adverse event reports; clinical study
reports and material study data; and Regulatory Authority inspection

[***] = 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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reports,  notices  of  adverse  findings,  warning  letters,  regulatory  filings  and  other  material
correspondence with Regulatory Authorities.  

11.6.13    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  Plamotamab  or  any  Plamotamab  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 Plamotamab or any Plamotamab Products.

11.6.14  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  Plamotamab  or  any  Plamotamab  Products.  None  of  the
Xencor Plamotamab Intellectual Property 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 any Governmental Authority.

11.7
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  LICENSED  CD28  ANTIBODIES,  LICENSED
CD28  PRODUCTS,  PLAMOTAMAB  AND  PLAMOTAMAB  PRODUCTS.    EACH  PARTY
HEREBY  DISCLAIMS  ANY  REPRESENTATION  OR  WARRANTY  THAT  THE
EXPLOITATION  OF  LICENSED  CD28  ANTIBODIES,  LICENSED  CD28  PRODUCTS,
PLAMOTAMAB  AND  PLAMOTAMAB  PRODUCTS  PURSUANT  TO  THIS  AGREEMENT
WILL BE SUCCESSFUL OR THAT ANY PARTICULAR SALES LEVEL WITH RESPECT TO
THE LICENSED CD28 PRODUCTS OR PLAMOTAMAB PRODUCTS WILL BE ACHIEVED.

PARTICULAR 

PURPOSE 

FITNESS 

FOR 

A 

11.8
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 Licensed
CD28  Antibodies,  Licensed  CD28  Products,  Plamotamab  or  Plamotamab  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

[***] = 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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of  its  officers,  employees  or  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  Licensed  CD28  Antibodies,  Licensed  CD28  Products,  Plamotamab  or
Plamotamab Products.

11.9

Compliance with Anti-Corruption Laws.

11.9.1 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)

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.  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

[***] = 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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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  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)

Xencor  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)

Xencor  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 11.9.1, 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 11.9.1.  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.

11.9.2 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 11.9.4 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

a government, governmental entity, or commercial enterprise owned or controlled by any

(iv)

inducing such Public Official to use his or her influence 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.

114

government  (including  state-owned  or  controlled  veterinary  or  medical  facilities)  in  obtaining  or
retaining any business whatsoever.

11.9.3 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.

11.9.4 For purposes of this Section 11.9, “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

11.10 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 [***]).

11.11

 [***].  

11.11.1 [***]  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 [***] are non-exclusive. Any amounts due to [***] or any other Third Party under [***]
shall be the sole responsibility of Xencor.

11.11.2 With respect to [***], 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  [***]  or  other  intellectual  property  that  are  the
subject  of  such  agreement,  as  the  case  may  be,  are  sublicensed  to  Janssen  in  accordance  with
Section 8.1;

[***] = 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.

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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 such agreement that would reasonably be expected to materially impact
the rights granted to Janssen under this Agreement, without the consent of Janssen;

(c)

(d)

comply in all material respects with the terms of such agreement;

(e)
accordance with the terms of such agreement;

make  all  payments  that  become  due  under  such  agreement  in

(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 such agreement, 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 [***] or under
[***].

(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)

Product by or for Janssen or any of its Affiliates, sublicensees, agents and contractors; or

(c)

the Exploitation of any Licensed CD28 Antibody or Licensed CD28

[***] = 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.

116

for Janssen or any of its Affiliates, sublicensees, agents and contractors;

(d)

the  Exploitation  of  Plamotamab  or  any  Plamotamab  Product  by  or

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.  

12.2
Indemnification by Xencor.    Xencor  will  indemnify,  defend  and  hold  harmless  Janssen
and its Affiliates, and their respective officers, directors, employees, agents, sublicensees, and 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 CD28 Antibody or Licensed
CD28 Product arising out of or relating to such Research by or for Janssen or any of its Affiliates,
sublicensees, agents and contractors);

of its Affiliates, sublicensees, agents and contractors;

(d)

the Detailing of any Licensed CD28 Product by or for Xencor or any

Xencor or any of its Affiliates, agents and contractors;

(e)

the  conduct  of  any  Independent  Plamotamab/Tafa  Study  by  or  for

(f)

the  Exploitation  of  Plamotamab  or  any  Plamotamab  Product  by  or
for Xencor or any of its Affiliates, sublicensees, agents and contractors (but not including Losses
relating to intellectual property infringement) prior to the Effective Date or in performance of the
Phase 1 Exploration Study or the Tafa/len Safety Run-in; or

the  making,  using,  offering  for  sale,  selling  or  importing  of
Plamotamab or any Plamotamab Product, as Plamotamab or such Plamotamab Product exists on or
before the Execution Date, actually or allegedly infringing any Patents of Merus B.V.  

(g)

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.  

[***] = 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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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 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 [***] following written request from the other Party, each Party will furnish to
such other Party a certificate of insurance evidencing such coverage.  

[***] = 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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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 (the “Term”) commencing on the Execution Date and ending,
on  a  country-by-country  basis  and  a  Product-by-Product  or  CD28/Plamotamab  Combination-by-
CD28/Plamotamab Combination basis, as follows: (a) with respect to a Licensed CD28 Product,
upon  the  expiration  of  the  applicable  Royalty  Term  in  such  country  for  such  Licensed  CD28
Product; (b) with respect to a Plamotamab Product, upon the expiration of the applicable Royalty
Term in such country for such Plamotamab Product; and (c) with respect to a CD28/Plamotamab
Combination,  upon  the  expiration  of  the  applicable  Royalty  Term  in  such  country  for  such
CD28/Plamotamab  Combination.    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 13.4 (Provisions for
Insolvency),  Section  13.5.1.2,  Section  13.5.4  (Non-Exclusive  Remedy)  and  Section  13.5.5
(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  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  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.  A breach of Section 5.1.2.1(b)(i), Section 6.4.1.1 or Section
6.4.2.1  by  Janssen  will  not  constitute  a  material  breach  of  this  Agreement  for  purposes  of  this
Section 13.2.  

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, 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
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

[***] = 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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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

Other Rights of Termination.

13.3.1 Without  Cause.    Janssen  may,  upon  [***]  prior  notice  to  Xencor,  terminate  this

Agreement in its entirety without cause.

13.3.2 Termination of Plamotamab Program.  

13.3.2.1

Janssen  Termination  of  Plamotamab  Program.    Janssen  may,  upon
[***] prior notice to Xencor, terminate this Agreement solely with respect to Plamotamab and the
Plamotamab  Products  without  cause  as  provided  in  Section  5.1.2.1(a)(i), Section 5.1.2.1(a)(ii)(2)
and  Section  5.1.2.1(a)(iv)(1).    In  addition,  Janssen  may,  upon  [***]  prior  notice  to  Xencor,
terminate this Agreement solely with respect to Plamotamab and the Plamotamab Products without
cause at any time following completion of the Plamotamab POC Study.

13.3.2.2

Breach of Plamotamab Diligence Obligations.  

(a)

Xencor  may  terminate  this  Agreement  solely  with  respect  to
Plamotamab and the Plamotamab Products in the event Janssen materially breaches its obligations
under  Section  5.1.2.1(b)(i),  Section  6.4.1.1  or  Section  6.4.2.1,  as  applicable,  by  providing  [***]
prior notice to Janssen (the “Plamotamab Cure Period”).    Such  notice  will  reasonably  describe
the alleged material breach in sufficient detail to put Janssen on notice and clearly state Xencor’s
intent to terminate this Agreement with respect to Plamotamab and the Plamotamab Products if the
alleged  breach  is  not  cured  within  the  Plamotamab  Cure  Period.    During  the  Plamotamab  Cure
Period,  if  Janssen  requests  a  meeting  with  Xencor  to  discuss  the  alleged  material  breach,  the
Parties will meet within [***] after Janssen’s request.  During such meeting, Xencor and Janssen
will  discuss  in  good  faith  a  plan  to  remedy  the  alleged  material  breach.    For  clarity,  if  Xencor
alleges material breach of Section 6.4.1.1, Janssen may exercise its rights under Section 6.4.1.4 at
any time during the Plamotamab Cure Period, in which case Janssen will have cured such alleged
breach.

(b)

If  Janssen  disputes  in  good  faith  the  existence  or  materiality  of  a
breach  specified  in  a  notice  provided  by  Xencor  in  accordance  with  this  Section  13.3.2.2,  and
Janssen provides Xencor notice of such dispute within the Plamotamab Cure Period, then Xencor
will  not  have  the  right  to  terminate  this  Agreement  with  respect  to  Plamotamab  and  the
Plamotamab  Products  under  this  Section  13.3.2.2  with  respect  to  such  alleged  breach  unless  and
until  (i)  the  dispute  resolution  process  in  ARTICLE  15  has  finally  determined  that  Janssen  has
breached  its  obligations  under  Section  5.1.2.1(b)(i),  Section  6.4.1.1  or  Section  6.4.2.1,  as
applicable, and (ii) Janssen fails to cure such breach within [***] following such final

[***] = 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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determination.    It  is  understood  and  agreed  that,  during  the  pendency  of  such  dispute,  all  of  the
terms and conditions of this Agreement applicable to Plamotamab and the Plamotamab Products
will  remain  in  effect  and  the  Parties  will  continue  to  perform  all  of  their  respective  obligations
hereunder with respect to Plamotamab and the Plamotamab Products.

For  clarity,  a  breach  of  Section  5.1.2.1(b)(i),  Section  6.4.1.1  or
Section 6.4.2.1 by Janssen will not constitute a material breach of this Agreement for purposes of
this Section 13.2.

(c)

(d)

For clarity, if Xencor terminates this Agreement solely with respect
to  Plamotamab  and  Plamotamab  Products  under  this  Section  13.3.2.2  after  this  Agreement  has
been  terminated  solely  with  respect  to  the  Licensed  CD28  Antibodies  and  Licensed  CD28
Products,  then  this  Agreement  will  be  deemed  to  be  terminated  in  its  entirety  as  of  the  effective
date of termination under this Section 13.3.2.2.  

13.3.3 Termination  of  Licensed  CD28  Program.    Xencor  will  have  the  right  to  terminate
this Agreement solely with respect to the Licensed CD28 Antibodies and Licensed CD28 Products
in  accordance  with  Section  3.7.4,  Section  6.4.2,  Section  6.4.3,  or  Section  6.5.    For  clarity:  (a)  if
Xencor terminates this Agreement solely with respect to Licensed CD28 Antibodies and Licensed
CD28  Products  under  this  Section  13.3.3  after  this  Agreement  has  been  terminated  solely  with
respect to Plamotamab and the Plamotamab Products, then this Agreement will be deemed to be
terminated in its entirety as of the effective date of termination under this Section 13.3.3; and (b)
termination  of  this  Agreement  solely  with  respect  to  Licensed  CD28  Antibodies  and  Licensed
CD28  Products  means,  without  limitation,  that  Section  8.4  (other  than  Section  8.4.8)  shall  no
longer apply after such termination.

13.4

Provisions for Insolvency.

13.4.1 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”).

13.4.2 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

[***] = 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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Janssen, as licensee of such rights under this Agreement, will retain and may fully exercise all of
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, 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:

13.4.2.1

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

13.4.2.2

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 13.4.2, 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.

13.4.3 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):

[***] = 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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13.4.3.1

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 necessary
for  the  manufacture,  use,  sale,  import  or  export  of  Licensed  CD28  Antibodies,  Licensed  CD28
Products, Plamotamab or Plamotamab Products; and

13.4.3.2

the  right  to  contract  directly  with  any  Third  Party  to  complete  the

contracted work.

13.5

Effects of Termination or Expiration.

13.5.1 Effects  of  Termination.    In  the  event  of  termination  of  this  Agreement  by  either
Party pursuant to Section 13.2, Section 13.3, or Section 13.4, then the following provisions of this
Section  13.5.1  will  apply  upon  the  effective  date  of  such  termination.    If  this  Agreement  is
terminated solely with respect to Plamotamab and the Plamotamab Products, then the provisions of
this Section 13.5.1 will apply only with respect to Plamotamab and the Plamotamab Products, and
if this Agreement is terminated solely with respect to the Licensed CD28 Antibodies and Licensed
CD28  Products,  then  the  provisions  of  this  Section  13.5.1  will  apply  only  with  respect  to  the
Licensed CD28 Antibodies and Licensed CD28 Products.  

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.  

13.5.1.1

13.5.1.2

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.    If  this  Agreement  is  terminated  solely  with  respect  to  Plamotamab  and  the
Plamotamab Products, or solely with respect to the Licensed CD28 Antibodies and Licensed CD28
Products, this Section will not apply to Confidential Information solely and specifically relating to
any CD28/Plamotamab Combinations.  

13.5.1.3

Subject to Section 13.5.2, Janssen will wind down any Development,
Manufacturing and Commercialization activities with respect to the Reverted Products (as defined
below),  as  quickly  as  reasonably  practicable,  subject  to  compliance  with  ethical  and  legal
requirements.    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 13.5.2.8; or (b)

[***] = 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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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 any Product.  If this Agreement is terminated
solely  with  respect  to  Plamotamab  and  the  Plamotamab  Products,  or  solely  with  respect  to  the
Licensed CD28 Antibodies and Licensed CD28 Products, this Section will also apply to activities
with respect to any CD28/Plamotamab Combinations.

13.5.2 Right of Reversion.  The following provisions of this Section 13.5.2 will apply upon
the  effective  date  of  any  termination  of  this  Agreement  (including,  without  limitation,  any
termination of this Agreement solely with respect to Plamotamab and the Plamotamab Products or
solely with respect to Licensed CD28 Antibodies and Licensed CD28 Products (as applicable)).    

13.5.2.1

Definitions.

(a)

(b)

Antibody, occurs when [***].

“Applied Janssen Technology” means [***].

“Research  Clone  Banking,”  with  respect  to  a  Licensed  CD28

(c)

(d)

“Reverted CD28 Antibody” means [***].

“Reverted  CD28  Derivative”  for  a  Reverted  CD28  Antibody,

(e)

“Reverted  CD28  Variant”  for  a  Reverted  CD28  Antibody,  means

means [***].    

[***].

(f)

“Reverted  CD28  Product”  means  any  Licensed  CD28  Product
containing  (or  that  is)  a  Licensed  CD28  Antibody  for  which:  [***].    Notwithstanding  the
foregoing,  if  a  Licensed  CD28  Product  described  in  the  immediately  preceding  sentence  is  a
Combination Product other than a CD28/Plamotamab Combination Product, a product containing
only the Licensed CD28 Antibody within such Combination Product shall be deemed a Reverted
CD28 Product, but the Combination Product shall not be deemed a Reverted CD28 Product.    

Reverted CD28 Product, any product that contains: [***].

(g)

“Reverted  CD28  Product  Derivative”  means,  with  respect  to  a

(h)

“Reverted  CD28/Plamotamab  Combination  Product”  means
[***].  Notwithstanding the foregoing, if a CD28/Plamotamab Combination Product described in
the  immediately  preceding  sentence  was  Developed  or  Commercialized  by  Janssen  prior  to  the
effective date of termination and contains a drug or biological product other than a Licensed CD28
Antibody  or  Plamotamab,  only  the  Licensed  CD28  Antibody  and  Plamotamab  within  such
Combination Product shall be deemed a Reverted CD28/Plamotamab Combination Product, but

[***] = 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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the  Combination  Product  shall  not  be  deemed  a  Reverted  CD28/Plamotamab  Combination
Product.

(i)

“Reverted Plamotamab Product” means any Plamotamab Product;
provided,  however,  if  such  Plamotamab  Product  is  a  Combination  Product  other  than  a
CD28/Plamotamab  Combination  Product,  only  Plamotamab  or  the  Plamotamab  Product  within
such Combination Product shall be deemed a Reverted Plamotamab Product, but the Combination
Product shall not be deemed a Reverted Plamotamab Product.

(j)

“Reverted Product” means (x) if this Agreement is terminated in its
entirety,  each  Reverted  CD28  Product,  Reverted  Plamotamab  Product  and  Reverted
CD28/Plamotamab Combination Product; (y) if this Agreement is terminated solely with respect to
Plamotamab  and  Plamotamab  Products,  each  Reverted  Plamotamab  Product  (but  excluding  any
CD28/Plamotamab  Combination  Product);  and  (z)  if  this  Agreement  is  terminated  solely  with
respect to Licensed CD28 Antibodies and Licensed CD28 Products, each Reverted CD28 Product
(but excluding any CD28/Plamotamab Combination Product).    

13.5.2.2

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, in the case of a Reverted CD28 Product, any Reverted CD28 Product Derivatives
of  such  Reverted  CD28  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 license
with respect 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  CD28  Antibodies  or  Plamotamab  contained  in  a  Reverted  Product  or,  if  applicable,
Reverted CD28 Product Derivative.

13.5.2.3

Xencor will pay to Janssen royalties on Net Sales of each Reverted
CD28  Product  (or  corresponding  Reverted  CD28  Product  Derivative)  and  each  Reverted
CD28/Plamotamab  Combination  Product  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  CD28  Products  or
CD28/Plamotamab Combination Products by Xencor, provided that the definition of Royalty Term
in Section 7.4.2 will remain the same.  

13.5.2.4

Janssen  will  assign  or  otherwise  transfer  to  Xencor  all  regulatory

documentation and filings and regulatory approvals (including, without limitation, all

[***] = 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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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 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).

13.5.2.5

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.

13.5.2.6

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  CD28  Antibodies
with respect thereto at a price equal to [***].

13.5.2.7

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.

13.5.2.8

If,  on  the  date  of  notice  of  termination,  any  Clinical  Study  of  the
Reverted  Product  is  ongoing  pursuant  to  the  CD28  Development  Plan  or  Plamotamab
Development  Plan  (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

[***] = 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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(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.

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.  If this Agreement is terminated solely
with  respect  to  Plamotamab  and  the  Plamotamab  Products,  or  solely  with  respect  to  Licensed
CD28 Antibodies and Licensed CD28 Products, this Section will not apply to any Clinical Study
of  a  CD28/Plamotamab  Combination  (and,  instead,  Section  13.5.1.3  will  apply  to  such  Clinical
Study).

13.5.2.9

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  13.5.2.    Except  as  otherwise
provided  in  this  Section  13.5.2,  each  Party  will  bear  its  own  costs  of  conducting  transition
activities.  

13.5.2.10

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.

13.5.2.11

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 13.5.2.2, 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

[***] = 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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performance  of  the  Exploitation  of  Reverted  Products  or  their  underlying  Licensed  CD28
Antibodies.  

13.5.2.12

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.

13.5.2.13

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)
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.

13.5.2.14

  Notwithstanding  anything  in  ARTICLE  9,  if  this  Agreement  is
terminated  with  respect  to  Licensed  CD28  Antibodies  and  Licensed  CD28  Products  (including
termination  of  this  Agreement  in  its  entirety),  Xencor  shall  have:  (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  CD28  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;  (d)
control  over  all  Invalidity  Claims  for  [***];  and  (e)  Xencor  shall  have  no  obligation  to  keep
Janssen informed in any way (or provide Janssen with an opportunity to review documents) with
respect  to  Prosecution  of  [***].   Additionally,  the  language  in  the  first  sentence  of  Section  9.6
above  that  reads  “Janssen  intends”  shall  be  deemed  to  read  “Xencor  intends”  as  it  applies  to
Licensed CD28 Products.  

13.5.2.15

Notwithstanding  anything  in  ARTICLE  9,  if  this  Agreement  is
terminated  with  respect  to  Plamotamab  and  Plamotamab  Products  (including  termination  of  this
Agreement in its entirety), Xencor shall have: (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  Plamotamab  Products  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; (d) control over all Invalidity Claims
for [***] and (e) Xencor shall have no obligation to keep Janssen informed in any way (or provide
Janssen  with  an  opportunity  to  review  documents)  with  respect  to  Prosecution  of  [***].
 Additionally, the language in the first sentence of Section 9.6 above that reads “Janssen intends”
shall be deemed to read “Xencor intends” as it applies to Plamotamab Products.

[***] = 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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13.5.2.16

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.

13.5.3 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
CD28  Products  and  Plamotamab  Products  in  the  Field  will  survive  on  a  fully-paid,  royalty-free,
non-exclusive, irrevocable and perpetual basis.

13.5.4 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.

13.5.5 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 10, ARTICLE 15, ARTICLE 16, Sections
3.4.3, 7.4.4 (but only with respect to licenses granted upon the expiration of a Royalty Term that
expires prior to the expiration of the Agreement), 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, 9.3.3, 9.3.4, 9.4.5, 9.6, 9.7, 11.7, 12.1, 12.2, 12.3, and 13.5.  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, 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

Commercially  Reasonable  Efforts.    Subject  to  the  terms  and  conditions  of  this
14.1
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 [***]

[***] = 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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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.

the  Parties 

in  connection  with 

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
this  Agreement  (the  “Contemplated
contemplated  by 
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  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

[***] = 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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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  Licensed  CD28  Antibodies,
Licensed CD28 Products, Plamotamab and Plamotamab 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) 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 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

[***] = 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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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 [***] 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  [***]  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 [***] 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.

15.4.5 The  hearing  will  be  concluded  in  [***]  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

[***] = 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.

132

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

Assignment; Successors.  Neither Party may assign this Agreement or any of its rights or
16.1
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  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

[***] = 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.

133

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  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 (x) any
16.3
Research Program activities with respect to the Licensed CD28 Products or (y) any Development
activities  set  forth  in  the  Plamotamab  Development  Plan  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  or  JDC,  as
applicable.  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  for  the
International Sale of Goods; (iii) the 1974 Convention on the Limitation Period 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.

134

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.

Notices.   All  notices,  requests,  demands,  waivers  and  other  communications  required  or
16.7
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.

Severability.    The  provisions  of  this  Agreement  will  be  deemed  severable  and  the
16.8
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.

135

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.

Captions.    All  captions  in  this  Agreement  are  for  convenience  only  and  will  not  be

16.9
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 CD28 Development Plan or
Plamotamab Development Plan, 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

[***] = 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.

136

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 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]

137

[***] = 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:

Name:

By:

Name:

Title: ___________________

Title: ___________________

[***] = 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.

                    
                    
                    
                    
  
 
  
 
  
 
  
 
LIST OF EXHIBITS AND SCHEDULES

Exhibit 1.8

Johnson & Johnson Universal Calendar

Schedule 1.42

Existing Third Party Agreements

Schedule 1.64

Certain Licensed CD28 Antibodies

Schedule 1.84

Plamotamab

Exhibit 1.88

Pre-Approved Study

Exhibit 3.2

Research Plan

Exhibit 5.1.1.2

Initial Plamotamab Development Budget

Exhibit 7.4.3.4

Examples of Royalty Calculations

Schedule 8.4.8

Certain Provisions of Existing Third Party Agreements

Schedule 9.2.2.4

Certain Inventions

Exhibit 10.5.1

Initial Press Release

Schedule 11.5.2

CD28 Binding Domains

Schedule 11.5.10

CD28 Patents of Xencor

Schedule 11.6.1

Certain Existing Third Party Agreements

Schedule 11.6.10

Plamotamab Patents of Xencor

Schedule 11.6.11

Plamotamab Regulatory Documentation and Licenses

[***] = 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

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 1.42

Existing Third Party Agreements

[***]Collaboration and License Agreement entered into by and between Xencor, Inc. and Novartis
Institutes  for  Biomedical  Research,  Inc.  as  of  June  26,  2016,  as  amended  (the  “Novartis
Collaboration  Agreement”)  and  that  certain  Side  Letter  regarding  “Disposition  of  Intellectual
Property  Assets  after  the  Termination  of  the  THG338  (CD20xCD3  bispecific  antibody)  project”
dated  around  September  2019  (the  “Novartis  Side  Letter”)  (collectively,  the  “Novartis
Agreements”).

[***]

[***] = 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 1.64

Certain Licensed CD28 Antibodies

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 1.84

Plamotamab

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.

Exhibit 1.88

Pre-Approved Studies

[***]

[***] = 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 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.

Exhibit 5.1.1.2

Initial Plamotamab Development Budget

[***]

[***] = 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 7.4.3.4

Examples of Royalty Calculations

[***]

[***] = 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 8.4.8

Certain Provisions of Existing Third Party Agreements

[***]

[***] = 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 9.2.2.4

Certain Inventions

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.

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

CD28 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.

Schedule 11.6.1

Certain Existing Third Party Agreements

[***]

[***] = 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 11.6.10

Plamotamab 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.

Schedule 11.6.11

Plamotamab Regulatory Documentation and Licenses

[***] = 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.

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 24, 2022, relating to the financial statements and the effectiveness of internal control over financial
reporting of Xencor, Inc., appearing in this Annual Report on the Form 10-K of Xencor, Inc. for the year ended
December 31, 2021.

/s/ RSM US LLP

Los Angeles, California
February 24, 2022

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, 2021 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 24, 2022

/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, 2021 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 24, 2022

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, 2021, 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 24, 2022

/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, 2021, 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 24, 2022

/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.