Forward Looking Statements



This Quarterly Report on Form 10-Q and other written and oral statements we make
from time to time contain certain "forward-looking" statements within the
meaning of Section 27A of the Securities Act of 1933 and Section 21E of the
Securities Exchange Act of 1934 (the "Exchange Act"). You can identify these
forward-looking statements by the fact they use words such as "could," "expect,"
"anticipate," "estimate," "target," "may," "project," "guidance," "intend,"
"plan," "believe," "will," "potential," "opportunity," "future" and other words
and terms of similar meaning and expression in connection with any discussion of
future operating or financial performance. You can also identify forward-looking
statements by the fact that they do not relate strictly to historical or current
facts. Such forward-looking statements are based on current expectations and
involve inherent risks and uncertainties, including factors that could delay,
divert or change any of them, and could cause actual outcomes to differ
materially from current expectations. These statements relate to, among other
things, our business strategy, our research and development, our product
development efforts, our ability to commercialize our product candidates, the
activities of our licensees, our prospects for initiating partnerships or
collaborations, the timing of the introduction of products, the effect of new
accounting pronouncements, uncertainty regarding our future operating results
and our profitability, anticipated sources of funds as well as our plans,
objectives, expectations, and intentions.

We have included more detailed descriptions of these risks and uncertainties and
other risks and uncertainties applicable to our business that we believe could
cause actual results to differ materially from any forward-looking statements in
Part II-Item 1A "Risk Factors" of this Quarterly Report on Form 10-Q. We
encourage you to read those descriptions carefully. Although we believe we have
been prudent in our plans and assumptions, no assurance can be given that any
goal or plan set forth in forward-looking statements can be achieved. We caution
investors not to place significant reliance on forward-looking statements
contained in this document; such statements need to be evaluated in light of all
the information contained in this document. Furthermore, the statements speak
only as of the date of this document, and we undertake no obligation to update
or revise these statements.

ASV™, Agenus™, AutoSynVax™, MiNK™, PSV™, PhosPhoSynVax™, Prophage™, Retrocyte
Display™ and Stimulon™ are trademarks of Agenus Inc. and its subsidiaries. All
rights reserved.

Overview

We are a clinical-stage immuno-oncology ("I-O") company advancing an extensive
pipeline of immune checkpoint antibodies, adoptive cell therapies and neoantigen
vaccines, to fight cancer and infections. Our business is designed to drive
success in I-O through speed, innovation and effective combination therapies. We
believe that combination therapies and a deep understanding of each patient's
cancer will drive substantial expansion of the patient population benefiting
from current I-O therapies. In addition to a diverse pipeline, we have assembled
fully integrated end-to-end capabilities including novel target discovery,
antibody generation, cell line development and current good manufacturing
practice manufacturing. We believe that these fully integrated capabilities
enable us to produce novel candidates on timelines that are shorter than the
industry standard. Leveraging our science and capabilities, we have forged
important partnerships to advance our innovation.

We are developing a comprehensive I-O portfolio driven by the following platforms and programs, which we intend to utilize individually and in combination:

• our multiple antibody discovery platforms, including our proprietary


        display technologies, designed to drive the discovery of future CPM
        antibody candidates;


  • our antibody candidate programs, including our CPM programs;

• our vaccine programs, including Prophage™, AutoSynVax™ and PhosPhoSynVax™;

• our saponin-based vaccine adjuvants, principally our QS-21 Stimulon™


        adjuvant, or QS-21 Stimulon; and


    •   our cell therapy subsidiary, MiNK Therapeutics, Inc. ("MiNK

Therapeutics"), which is designed to drive the advancement of a novel

allogeneic invariant natural killer T cell ("iNKT") therapy in immune

diseases.




We assess development, commercialization and partnering strategies for each of
our product candidates periodically based on several factors, including
pre-clinical and clinical trial results, competitive positioning and funding
requirements and resources. Our anti-CTLA-4 and anti-PD-1 programs (zalifrelimab
and balstilimab, respectively) are in late phase clinical trials designed to
support BLA filings under the U.S. Food and Drug Administration ("FDA")
accelerated approval pathway. We announced interim data from these trials in
February, March and September 2020. We initiated the rolling submission of our
BLA for balstilimab monotherapy to treat 2nd line cervical cancer in September
2020. We completed this BLA filing in April 2021 and the FDA accepted this
application in June 2021, granting it priority review with a Prescription Drug
User Fee Act ("PDUFA") target action date of December 16, 2021. We expect to
solidify our strategy for the balstilimab/zalifrelimab combination filing,
pending further discussion with the FDA.

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We have formed collaborations with companies such as Bristol Myers Squibb
Company ("BMS"), Betta Pharmaceuticals Co., Ltd. ("Betta"), Gilead Sciences,
Inc. ("Gilead"), Incyte Corporation ("Incyte"), Merck Sharpe & Dohme ("Merck")
and Recepta Biopharma SA ("Recepta"). Through these alliances, as well as our
own internal programs, we currently have more than a dozen antibody programs in
pre-clinical or clinical development.

Pursuant to our collaboration agreement with Incyte, we have exclusively
licensed to Incyte monospecific antibodies targeting GITR, OX40, TIM-3 and
LAG-3, which Incyte is currently advancing in various clinical trials, as well
as an additional undisclosed target that Incyte is advancing in preclinical
studies. Under the terms of our agreement, Incyte is responsible for all future
development expenses, and we are eligible to receive up to an additional $500.0
million in potential milestone payments plus royalties on any future sales.
Pursuant to our collaboration and license agreement with Merck, we exclusively
licensed to Merck a monospecific antibody targeting ILT4, which Merck is
advancing in a Phase 2 clinical trial. Under the terms of our agreement, Merck
is responsible for all future development expenses, and we are eligible to
receive up to an additional $85.0 million in potential milestone payments plus
royalties on any future sales. In September 2018, we, through our wholly-owned
subsidiary, Agenus Royalty Fund, LLC, entered into a royalty purchase agreement
(the "XOMA Royalty Purchase Agreement") with XOMA (US) LLC ("XOMA"). Pursuant to
the terms of the XOMA Royalty Purchase Agreement, XOMA purchased 33% of all
future royalties and 10% of all future milestone payments that we are entitled
to receive from Incyte and Merck, net of certain of our obligations to a third
party. After taking into account our obligations under the XOMA Royalty Purchase
Agreement, as of June 30, 2021, we remain eligible to receive up to $450.0
million and $76.5 million in potential development, regulatory and commercial
milestones from Incyte and Merck, respectively.

In December 2018, we entered into a series of agreements with Gilead to
collaborate on the development and commercialization of up to five novel I-O
therapies (the "Gilead Collaboration Agreements"). Pursuant to the Gilead
Collaboration Agreements, Gilead received worldwide exclusive rights to our
bispecific antibody, AGEN1423, as well as the exclusive option to exclusively
license AGEN1223, a bispecific antibody, and AGEN2373, a monospecific antibody.
All three assets have entered clinical development. In November 2020, Gilead
elected to return AGEN1423 to us and to voluntarily terminate the license
agreement effective as of February 4, 2021. The option agreements remain in
place, and we are responsible for developing each program up to the option
decision points, at which time Gilead may acquire exclusive rights to the
programs on option exercise. For either, but not both, of the option programs,
we have the right to opt-in to share Gilead's development and commercialization
costs in the United States in exchange for a profit (loss) share on a 50:50
basis and revised milestone payments. Pursuant to the terms of the Gilead option
agreements, we remain eligible to receive up to $100.0 million in option
exercise fees and, if exercised, up to an additional $1.0 billion in aggregate
milestone payments, as well as royalties on any future sales.

In June 2020, we entered into a license and collaboration agreement (the "Betta
License Agreement") with Betta, pursuant to which we granted Betta an exclusive
license to develop, manufacture and commercialize balstilimab and zalifrelimab
in Greater China. Under the terms of the Betta License Agreement, we received
$15.0 million upfront and are eligible to receive up to $100.0 million in
milestone payments plus royalties on any future sales in Greater China.

In May 2021, we entered into a License, Development and Commercialization
Agreement ("BMS License Agreement") with BMS to collaborate on the development
and commercialization of our pre-clinical proprietary anti-TIGIT bispecific
antibody program AGEN1777. Under the BMS License Agreement, we granted BMS an
exclusive worldwide license under certain of our intellectual property rights to
develop, manufacture and commercialize AGEN1777 and its derivatives in all
fields; provided, we retained an option to access the licensed antibodies for
use in clinical studies in combination with certain of our other pipeline assets
subject to certain restrictions. Pursuant to the BMS License Agreement, we
received an upfront cash payment of $200.0 million in July 2021 and are eligible
to receive up to $1.36 billion in aggregate development, regulatory and
commercial milestone payments plus tiered royalties. In exchange, BMS is
responsible for all of the development, regulatory approval, manufacturing and
commercialization costs with respect to products containing AGEN1777. We have
the option, but not the obligation, to co-fund a minority of the global
development costs of products containing AGEN1777 or its derivatives, in
exchange for increased tiered royalties. Finally, we also have the option to
co-promote AGEN1777 in the U.S.

Our QS-21 Stimulon adjuvant is partnered with GlaxoSmithKline ("GSK") and is a
key component in multiple GSK vaccine programs. These programs are in various
stages, with the most advanced being GSK's shingles vaccine, Shingrix. In
October 2017, GSK's shingles vaccine was approved in the United States by the
FDA. In January 2018, we entered into a Royalty Purchase Agreement with
Healthcare Royalty Partners III, L.P. and certain of its affiliates (together,
"HCR"), pursuant to which HCR purchased 100% of our worldwide rights to receive
royalties from GSK on GSK's sales of vaccines containing our QS-21 Stimulon
adjuvant. We do not incur clinical development costs for products partnered with
GSK. We were also entitled to receive up to $40.35 million in milestone payments
from HCR based on sales of GSK's vaccines as follows: (i) $15.1 million upon
reaching $2.0 billion last-twelve-months net sales any time prior to 2024 (the
"First HCR Milestone") and (ii) $25.25 million upon reaching $2.75 billion
last-twelve-months net sales any time prior to 2026 (the "Second HCR
Milestone"). We received the First HCR Milestone after GSK's net sales of
Shingrix for the twelve months ended December 31, 2019 exceeded $2.0 billion,
and we remain eligible to receive the Second HCR Milestone.

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Our business activities include product research and development, intellectual
property prosecution, manufacturing, regulatory and clinical affairs, corporate
finance and development activities, and support of our collaborations. Our
product candidates require clinical trials and approvals from regulatory
agencies, as well as acceptance in the marketplace. Part of our strategy is to
develop and commercialize some of our product candidates by continuing our
existing arrangements with academic and corporate collaborators and licensees
and by entering into new collaborations.

Our subsidiary MiNK Therapeutics (formerly AgenTus Therapeutics, Inc.) is
focused on the development of unmodified iNKT cell therapies for the treatment
of cancer and other life-threatening illnesses. In May 2020 and June 2020, the
FDA cleared Investigational New Drug applications for AGENT-797, an allogeneic
iNKT therapy, for the treatment of patients with hematological malignancies,
including multiple myeloma and B cell lymphoma, and COVID-19-realted pneumonia,
respectively. In November 2020, MiNK Therapeutics dosed its first COVID-19
patient with AGENT-797, and trials for hematological malignancies commenced in
April 2021. In July 2021 MiNK Therapeutics announced that it had confidentially
submitted a draft registration statement on Form S-1 with the Securities and
Exchange Commission (the "SEC") relating to the proposed initial public offering
of its common stock. The number of shares to be offered and the price range for
the proposed offering have not yet been determined. The initial public offering
is expected to take place after the SEC completes its review process, subject to
market and other conditions. MiNK Therapeutics licenses intellectual property
assets from Agenus and has its own governance.

Historical Results of Operations

Three months ended June 30, 2021 compared to the three months ended June 30, 2020

Research and development revenue



 We recognized research and development revenue of approximately $1.7 million
and $18.1 million during the three months ended June 30, 2021 and 2020,
respectively. Research and development revenues in the second quarter of 2021
primarily consisted of $1.4 million related to the recognition of deferred
revenue earned under our Gilead Collaboration Agreements and $0.2 million of
research service revenue earned under our Incyte Collaboration Agreement.
Research and development revenues in the second quarter of 2020 primarily
consisted of $4.0 million related to the recognition of deferred revenue earned
under our Gilead Collaboration Agreements and $13.9 million related to the
recognition of an upfront fee under our Betta License Agreement.

Non-cash royalty revenue related to the sale of future royalties



In January 2018, we sold 100% of our worldwide rights to receive royalties from
GSK on sales of GSK's vaccines containing our QS-21 Stimulon adjuvant to HCR. As
described in Note F to our Condensed Consolidated Financial Statements, this
transaction has been recorded as a liability that amortizes over the estimated
life of our Royalty Purchase Agreement with HCR. As a result of this liability
accounting, even though the royalties are remitted directly to HCR, we record
these royalties from GSK as revenue. During both the three months ended June 30,
2021 and 2020, we recognized approximately $7.8 million, in non-cash royalty
revenue related to our agreement with GSK.

Research and development expense



Research and development expense includes the costs associated with our internal
research and development activities, including compensation and benefits,
occupancy costs, manufacturing costs, costs of consultants, and administrative
costs. Research and development expense increased 18% to $45.5 million for the
three months ended June 30, 2021 from $38.6 million for the three months ended
June 30, 2020. Increased expenses in the three months ended June 30, 2021
primarily relate to a $5.7 million increase in third-party services and other
related expenses related to the advancement of our antibody programs, a $0.3
million increase in personnel related expenses, a $0.6 million increase in
expenses attributable to the activities of our subsidiaries and a $0.3 million
increase in other research and development expenses.

General and administrative expense



General and administrative expense consists primarily of personnel costs,
facility expenses, and professional fees. General and administrative expenses
increased 17% to $16.7 million for the three months ended June 30, 2021 from
$14.2 million for the three months ended June 30, 2020. Increased expenses in
the three months ended June 30, 2021 primarily relate to a $2.0 million increase
in personnel related expenses, primarily due to increased share-based
compensation expense, a $0.4 million increase in professional fees, primarily
due to increased expenses related to commercial readiness activities and a $0.2
million increase in expenses attributable to the activities of our subsidiaries.

Contingent purchase price consideration fair value adjustment



Contingent purchase price consideration fair value adjustment represents the
change in the fair value of our purchase price considerations, which mainly
resulted from changes in our market capitalization and share price and changes
in the credit spread since each reporting period end. The fair value of our
contingent purchase price considerations is mainly based on estimates from a
Monte Carlo simulation of our market capitalization and share price.

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Non-operating income (expense)



Non-operating income (expense) includes our foreign currency translation
adjustment and other income or expense. Non-operating expense increased $0.6
million for the three months ended June 30, 2021, from expense of $0.3 million
for the three months ended June 30, 2020 to expense of $0.9 million for the
three months ended June 30, 2021, primarily due to increased foreign currency
exchange losses in the second quarter of 2021 compared to the second quarter of
2020.

Interest expense, net

Interest expense, net increased to approximately $16.7 million for the three
months ended June 30, 2021 from $14.6 million for the three months ended June
30, 2020, due to increased non-cash interest recorded in connection with our
Royalty Purchase Agreement with HCR.



Six months ended June 30, 2021 compared to the six months ended June 30, 2020

Research and development revenue



We recognized research and development revenue of approximately $3.3 million and
$20.0 million during the six months ended June 30, 2021 and 2020, respectively.
Research and development revenues in the first half of 2021 primarily consisted
of $2.4 million related to the recognition of deferred revenue earned under our
Gilead Collaboration Agreements and $0.7 million of research service revenue
earned under our Incyte Collaboration Agreement. Research and development
revenues in the first half of 2020 primarily consisted of $5.8 million related
to the recognition of deferred revenue earned under our Gilead Collaboration
Agreements and $13.9 million related to the recognition of an upfront fee under
our Betta License Agreement.

Non-cash royalty revenue related to the sale of future royalties



In January 2018, we sold 100% of our worldwide rights to receive royalties from
GSK on sales of GSK's vaccines containing our QS-21 Stimulon adjuvant to HCR. As
described in Note F to our Condensed Consolidated Financial Statements, this
transaction has been recorded as a liability that amortizes over the estimated
life of our Royalty Purchase Agreement with HCR. As a result of this liability
accounting, even though the royalties are remitted directly to HCR, we will
record these royalties from GSK as revenue. During the six months ended June 30,
2021 and 2020, we recognized approximately $16.3 million and $21.0 million,
respectively, in non-cash royalty revenue related to our agreement with GSK.

Research and development expense



Research and development expense includes the costs associated with our internal
research and development activities, including compensation and benefits,
occupancy costs, manufacturing costs, costs of consultants, and administrative
costs. Research and development expense increased 10% to $82.2 million for the
six months ended June 30, 2021 from $74.9 million for the six months ended June
30, 2020. Increased expenses in the six months ended June 30, 2021 primarily
relate to a $5.6 million increase in third-party services and other related
expenses related to the advancement of our antibody programs, a $1.3 million
increase in expenses attributable to the activities of our subsidiaries and a
$0.4 million increase in other research and development expenses.

General and administrative expense



General and administrative expense consists primarily of personnel costs,
facility expenses, and professional fees. General and administrative expenses
increased 33% to $33.0 million for the six months ended June 30, 2021 from $24.8
million for the six months ended June 30, 2020. Increased expenses in the six
months ended June 30, 2021 primarily relate to a $1.4 million increase in
professional fees, primarily due to increased expenses related to commercial
readiness activities, a $4.7 million increase in personnel related expenses,
primarily due to both increased share-based compensation expense and increased
headcount, a $1.4 million increase in expenses attributable to the activities of
our subsidiaries and a $0.7 million increase in other general and administrative
expenses.

Contingent purchase price consideration fair value adjustment



Contingent purchase price consideration fair value adjustment represents the
change in the fair value of our purchase price considerations, which mainly
resulted from changes in our market capitalization and share price and changes
in the credit spread since each reporting period end. The fair value of our
contingent purchase price considerations is mainly based on estimates from a
Monte Carlo simulation of our market capitalization and share price.

Non-operating income (expense)



Non-operating income (expense) includes our foreign currency translation
adjustment and other income or expense. Non-operating income increased $3.3
million for the six months ended June 30, 2021, from expense of $1.4 million for
the six months ended June 30, 2020 to income of $1.9 million for the six months
ended June 30, 2021, primarily due to our increased foreign currency exchange
gains in the first half of 2021 compared to the first half of 2020.

Interest expense, net:


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Interest expense, net increased to approximately $32.6 million for the six
months ended June 30, 2021 from $28.7 million for the six months ended June 30,
2020, due to increased non-cash interest recorded in connection with our Royalty
Purchase Agreement with HCR.

Research and Development Programs





For the six months ended June 30, 2021, our research and development programs
consisted largely of our antibody programs as indicated in the following table
(in thousands).



                                              Six Months
                                              Ended June
                                                  30,                Year Ended December 31,
Research and                                                                                            Prior to
Development Program                Product       2021           2020          2019          2018          2018           Total
Antibody programs*                 Various    $    68,191     $ 118,200

$ 126,400 $ 97,011 $ 256,288 $ 666,090 Heat shock proteins for cancer Prophage


                                   and ASV            495         1,076        13,235        13,235       335,890         363,931
Vaccine adjuvant                    QS-21
                                   Stimulon         1,331           304           872           211        14,098          16,816
Cell therapies and other
research and development
programs                           Various         12,167        23,037        27,832        14,143        78,342         155,521
Total research and development
expenses                                      $    82,184     $ 142,617     $ 168,339     $ 124,600     $ 684,618     $ 1,202,358

* Prior to 2014, costs were incurred by 4-AB, which we acquired in February


    2014.




Research and development program costs include compensation and other direct
costs plus an allocation of indirect costs, based on certain assumptions and our
review of the status of each program. Our product candidates are in various
stages of development and significant additional expenditures will be required
if we start new clinical trials, encounter delays in our programs, apply for
regulatory approvals, continue development of our technologies, expand our
operations, and/or bring our product candidates to market. The total cost of any
particular clinical trial is dependent on a number of factors such as trial
design, length of the trial, number of clinical sites, number of patients, and
trial sponsorship. The process of obtaining and maintaining regulatory approvals
for new therapeutic products is lengthy, expensive, and uncertain. Because of
the current stage of our product candidates, among other factors, we are unable
to reliably estimate the cost of completing our research and development
programs or the timing for bringing such programs to various markets or
substantial partnering or out-licensing arrangements, and, therefore, when, if
ever, material cash inflows are likely to commence. Active programs involving
QS-21 Stimulon depend on our licensee successfully completing clinical trials,
successfully manufacturing QS-21 Stimulon to meet demand, obtaining regulatory
approvals and successfully commercializing product candidates containing QS-21
Stimulon.

Liquidity and Capital Resources



We have incurred annual operating losses since inception, and we had an
accumulated deficit of $1.6 billion as of June 30, 2021. We expect to incur
significant losses over the next several years as we continue development of our
technologies and product candidates, manage our regulatory processes, initiate
and continue clinical trials, and prepare for potential commercialization of
products. To date, we have financed our operations primarily through corporate
partnerships, advance royalty sales and the issuance of equity. From our
inception through June 30, 2021, we have raised aggregate net proceeds of
approximately $1.5 billion through the sale of common and preferred stock, the
exercise of stock options and warrants, proceeds from our Employee Stock
Purchase Plan, royalty monetization transactions, and the issuance of
convertible and other notes.

We maintain an effective registration statement (the "Registration Statement"),
covering an unlimited amount of common stock, preferred stock, warrants, debt
securities and units. The Registration Statement includes prospectuses covering
the offer, issuance and sale of up to 100 million shares of our common stock
from time to time in "at-the-market offerings" pursuant to an At Market Issuance
Sales Agreement (the "Sales Agreement") with B. Riley FBR, Inc. as our sales
agent. We sold approximately 22.3 million shares of our common stock pursuant to
the Sales Agreement during the six months ended June 30, 2021, and received
aggregate net proceeds totaling $70.0 million. As of June 30, 2021, we had
approximately 60.0 million shares that remained available for sale under the
Sales Agreement.

As of June 30, 2021, we had debt outstanding of $20.0 million in principal. In
February 2015, we issued senior subordinated promissory notes in the aggregate
principal amount of $14.0 million with annual interest at 8% (the "2015
Subordinated Notes"). In February 2020, we amended $13.5 million of the 2015
Subordinated Notes, extending the due date by three years to February 2023.

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The remaining $0.5 million of the 2015 Subordinated Notes were repaid in
February 2020. In April 2020, we repaid an additional $0.5 million of the 2015
Subordinated Notes, leaving $13.0 million outstanding. In May 2020, we received
$6.2 million under the Paycheck Protection Program of the Coronavirus Aid,
Relief and Economic Security Act of 2020 (the "CARES Act") which is classified
as debt in our condensed consolidated balance sheet as we cannot yet determine
if the amount will be partially or fully forgiven.

Our cash and cash equivalents at June 30, 2021 were $73.5 million, a decrease of $26.3 million from December 31, 2020.



During the past five years, we have successfully financed our operations through
income and revenues generated from corporate partnerships, advance royalty sales
and issuance of equity. Based on our current plans and projections, we believe
our quarter end cash resources of $73.5 million as of June 30, 2021, plus the
$200.0 million fee received subsequently in connection with our transaction with
BMS, will be sufficient to satisfy our liquidity requirements for more than one
year from when these financial statements were issued. We are presently in
partnership, and out licensing discussions and contemplating additional
financial transactions which, if consummated, could extend our cash resources
substantially beyond 2022.

Management continues to address the Company's liquidity position and has the
flexibility to adjust spending as needed in order to preserve liquidity. In
March 2020, in response to the COVID-19 pandemic, we streamlined our
organization, which included a headcount reduction, and our CEO, Dr. Garo Armen,
elected to receive his base salary in stock rather than cash for the remainder
of 2020 and through the first half of 2021. We continuously evaluate the
likelihood of success of our programs. As such, our decisions to continue to
fund or eliminate funding of each of our programs are predicated on these
determinations, on an ongoing basis. We are prepared to discontinue funding of
any activities that do not impact our core priorities if they do not prove to be
feasible, and to restrict capital expenditures and/or reduce the scale of our
operations. We expect our potential sources of funding to include: (1)
collaborations, out-licensing and/or partnering opportunities for our portfolio
programs and product candidates with multiple parties (2) milestone payments
from our existing partnerships (3) consummating additional third-party
agreements, (4) selling assets, (5) securing project financing and/or (6)
selling equity securities.

Our future cash requirements include, but are not limited to, supporting
clinical trial and regulatory efforts and continuing our other research and
development programs. Since inception, we have entered into various agreements
with contract manufacturers, institutions, and clinical research organizations
(collectively "third party providers") to perform pre-clinical activities and to
conduct and monitor our clinical studies and trials. Under these agreements,
subject to the enrollment of patients and performance by the applicable
third-party provider, we have estimated our total payments to be $476.8 million
over the term of the related activities. Through June 30, 2021, we have expensed
$351.8 million as research and development expenses and $342.9 million has been
paid under these agreements. The timing of expense recognition and future
payments related to these agreements is subject to the enrollment of patients
and performance by the applicable third-party provider. We plan to enter into
additional agreements with third party providers and we anticipate significant
additional expenditures will be required to initiate and advance our various
programs.

Part of our strategy is to develop and commercialize some of our product
candidates by continuing our existing collaboration arrangements with academic
and collaboration partners and licensees and by entering into new
collaborations. As a result of our collaboration agreements, we will not
completely control the efforts to attempt to bring those product candidates to
market. For example, our collaboration with Incyte for the development,
manufacture and commercialization of CPM antibodies against certain targets is
managed by a joint steering committee, which is controlled by Incyte.

Net cash used in operating activities for the six months ended June 30, 2021 and
2020 was $98.3 million and $71.9 million, respectively. Our future ability to
generate cash from operations will depend on achieving regulatory approval and
market acceptance of our product candidates, achieving benchmarks as defined in
existing collaboration agreements, and our ability to enter into new
collaborations. See "Management's Discussion and Analysis of Financial Condition
and Results of Operations-Forward Looking Statements" in Part I, Item 2, and the
risks highlighted under Part II, Item 1A. "Risk Factors", of this Quarterly
Report on Form 10-Q.



Off-Balance Sheet Arrangements

We did not have any off-balance sheet arrangements as of June 30, 2021.

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