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Jounce Therapeutics

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FY2020 Annual Report · Jounce Therapeutics
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
________________________________________________________________________________________________________

FORM 10-K

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

________________________________________________________________________________________________________

For the fiscal year ended December 31, 2020
or

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

For the transition period from ______________ to ______________.

Commission File Number 001-37998
________________________________________________________________________________________________________

JOUNCE THERAPEUTICS, INC.
(Exact name of registrant as specified in its charter)
________________________________________________________________________________________________________

  Delaware

(State or other jurisdiction of
incorporation or organization)

780 Memorial Drive

Cambridge,

Massachusetts

(Address of principal executive offices)

45-4870634

(I.R.S. Employer
Identification No.)

02139

(Zip Code)

Registrant’s telephone number, including area code: (857) 259‑3840

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

Title of each class

Common Stock, $0.001 par value per share

Trading Symbol(s)

JNCE

Name of each exchange on which registered

Nasdaq Global Select Market

Securities registered pursuant to Section 12(g) of the Act:
None

    Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐  No x

    Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐  No x

    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 x  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 x  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

Non‑accelerated filer

☐

☐

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 Act). Yes ☐  No ☒

    As of June 30, 2020, the last business day of the registrant’s most recently completed second fiscal quarter, the aggregate market value of the registrant’s Common Stock held by non-affiliates of the registrant
was approximately $117,863,213, based upon the closing price of the registrant’s Common Stock on June 30, 2020.
    As of February 19, 2021, there were 45,393,561 shares of common stock, $0.001 par value per share, outstanding.

    Portions of the registrant’s Definitive Proxy Statement on Schedule 14A relating to its 2021 Annual Meeting of Stockholders to be filed within 120 days of the end of the registrant’s fiscal year ended
December 31, 2020 are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein.

Documents Incorporated by Reference

 
 
 
    
    
Table of Contents

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.

EXHIBIT INDEX
SIGNATURES

Table of Contents

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

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Selected Financial Data
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures above Market Risk
Financial Statements and Supplementary Data
Change 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 and Financial Statement Schedules
Form 10-K Summary

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References to Jounce

Throughout this Annual Report on Form 10-K, the “Company,” “Jounce,” “Jounce Therapeutics,” “we,” “us,” and “our,” except where the context requires
otherwise,  refers  to  Jounce  Therapeutics,  Inc.  and  its  consolidated  subsidiary,  and  “our  board  of  directors”  refers  to  the  board  of  directors  of  Jounce
Therapeutics, Inc.

Cautionary Note Regarding Forward-Looking Statements and Industry Data

This  Annual  Report  on  Form  10-K  contains  forward-looking  statements  that  involve  substantial  risks  and  uncertainties.  All  statements  other  than
statements of historical facts contained in this Annual Report on Form 10-K, including statements regarding our strategy, future operations, future financial
position, future revenue, projected costs, prospects, plans, objectives of management and expected market growth, are forward-looking statements. These
statements involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to
be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements.

The  words  “aim,”  “anticipate,”  “believe,”  “continue,”  “could,”  “estimate,”  “expect,”  “goal,”  “intend,”  “may,”  “plan,”  “potential,”  “predict,”  “project,”
“target,”  “will”  and  similar  expressions  are  intended  to  identify  forward-looking  statements,  although  not  all  forward-looking  statements  contain  these
identifying words. These forward-looking statements include, among other things, statements about:

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the  timing,  progress,  and  results  of  preclinical  studies  and  clinical  trials  for  our  current  and  future  product  candidates,  including  statements
regarding the timing of initiation and completion of studies or trials and related preparatory work, the period during which the results of the trials
will become available, and our research and development programs;

our plans and expectations in light of the COVID-19 pandemic and its impacts on our operations and global healthcare systems;

the timing, scope, or likelihood of regulatory filings and approvals, including, as applicable, timing of our investigational new drug applications
for, biologics license application filing for, and final Food and Drug Administration approval of our current and future product candidates;

our  ability  to  use  our  Translational  Science  Platform  to  identify  targets  for  future  product  candidates  and  to  match  immunotherapies  to  select
patient subsets;

our ability to identify, develop and advance future product candidates into, and successfully complete, clinical studies;

our  ability  to  develop  combination  therapies,  whether  on  our  own  or  in  collaboration  with  third  parties,  for  our  current  and  future  product
candidates;

our  expectations  regarding  the  size  of  the  patient  populations  for  our  product  candidates,  if  approved  for  commercial  use,  and  any  product
candidates we may develop;

our commercialization and marketing capabilities and strategy;

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

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

our ability to develop and commercialize a companion diagnostic or complementary diagnostic for our current and future product candidates;

the rate and degree of market acceptance and clinical utility of our current and future product candidates;

the potential benefits of our exclusive license of JTX-1811 to Gilead Sciences, Inc.;

our ability to establish or maintain future collaborations or strategic relationships or obtain additional funding;

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

our intellectual property position, including the scope of protection we are able to establish and maintain for intellectual property rights covering
our current and future product candidates, and our ability not to infringe, misappropriate or otherwise violate any third-party intellectual property
rights;

our competitive position, and developments and projections relating to our competitors and our industry;

our estimates regarding expenses, future revenue, capital requirements and needs for additional financing; and

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the impact of laws and regulations.

There are a number of important risks and uncertainties that could cause our actual results to differ materially from those indicated by forward-looking
statements. We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue
reliance  on  our  forward-looking  statements.  Actual  results  or  events  could  differ  materially  from  the  plans,  intentions  and  expectations  disclosed  in  the
forward-looking  statements  we  make.  We  have  included  important  factors  in  the  cautionary  statements  included  in  this  Annual  Report  on  Form  10-K,
particularly in the section entitled “Risk Factors” in Part I, Item 1A that could cause actual results or events to differ materially from the forward-looking
statements that we make. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures
or investments that we may make.

You should read this Annual Report on Form 10-K and the documents that we have filed as exhibits to this Annual Report on Form 10-K completely and
with the understanding that our actual future results may be materially different from what we expect. The forward-looking statements contained in this
Annual Report on Form 10-K are made as of the date of this Annual Report on Form 10-K, and we do not assume any obligation to update any forward-
looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law.

This Annual Report on Form 10-K may include industry and market data, which we may obtain from our own internal estimates and research, as well as
from industry and general publications and research, surveys, and studies conducted by third parties. Industry publications, studies, and surveys generally
state that they have been obtained from sources believed to be reliable, although they do not guarantee the accuracy or completeness of such information.
While we believe that such studies and publications are reliable, we have not independently verified market and industry data from third‑party sources.

Summary of Risk Factors

Below is a summary of the principal risk factors that make an investment in our common stock speculative or risky. This summary does not address all of
the risks that we face. Additional discussion of the risks summarized in this risk factor summary, and other risks that we face, can be found below under the
heading “Risk Factors” and should be carefully considered, together with other information in this Form 10-K and our other filings with the SEC, before
making an investment decision regarding our common stock.

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The ongoing COVID-19 pandemic has adversely affected, and may continue to adversely affect, our business, including our clinical trials, supply
chain and preclinical studies.

We are early in our development efforts. If we are unable to advance our product candidates through clinical development, advance future product
candidates  to  clinical  development  or  obtain  marketing  approval  and  ultimately  commercialize  any  product  candidates,  our  business  will  be
materially harmed.

Clinical product development involves a lengthy and expensive process, with an uncertain outcome. We will incur additional costs in connection
with,  and  may  experience  delays,  in  completing,  or  ultimately  be  unable  to  complete,  the  development  and  commercialization  of  our  product
candidates.

If we encounter difficulties enrolling or retaining patients in our clinical trials, our clinical development activities could be delayed or otherwise be
adversely affected.

Because we rely on third-party manufacturing and supply partners, our supply of research and development, preclinical and clinical development
materials may become limited or interrupted or may not be of satisfactory quantity or quality.

We  rely  and  expect  to  continue  to  rely  on  third  parties  to  conduct  our  clinical  trials.  If  these  third  parties  do  not  successfully  carry  out  their
contractual duties, comply with regulatory requirements or meet expected deadlines, our business could be substantially harmed.

We face significant competition. If our competitors develop and market products that are more effective, safer or less expensive than any of our
product candidates, our commercial opportunities will be negatively impacted.

We rely on our Translational Science Platform to identify and develop product candidates. Our competitive position could be materially harmed if
our competitors develop a platform similar to our Translational Science Platform and develop rival product candidates.

We will depend on Gilead to develop, manufacture and commercialize JTX-1811 and may depend on additional third parties for the development
and commercialization of our other product candidate programs.

We may develop companion diagnostics and/or complementary diagnostics for our product candidates. If we are unable to successfully develop
such companion diagnostics or complementary diagnostics, or experience significant delays in doing so, we may not realize the full commercial
potential of our current or future product candidates.

We have accumulated significant losses since our inception and anticipate that we will continue to incur substantial net losses in the foreseeable
future.

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We will require substantial additional financing to achieve our goals, and a failure to obtain this necessary capital when needed could force us to
delay, limit, reduce or terminate our product development or commercialization efforts.

If we are unable to obtain, maintain and protect our intellectual property rights for our product candidates or if our intellectual property rights are
inadequate, our competitive position could be harmed.

If we are unable to protect the confidentiality of our proprietary information and know-how, the value of our technology and products could be
adversely affected.

We are highly dependent on our key personnel, and if we are not successful in attracting, motivating and retaining highly qualified personnel, we
may not be able to successfully implement our business strategy.

The price of our common stock may be volatile and fluctuate substantially, which could result in substantial losses for purchasers of our common
stock.

Website and Social Media Disclosure

From  time  to  time,  we  may  use  our  website  (www.jouncetx.com),  investor  and  media  relations  website  (http://ir.jouncetx.com),  Facebook  page
(https://www.facebook.com/jouncetx),  LinkedIn  page  (https://www.linkedin.com/company/3494537/)  and  Twitter  feed  (https://twitter.com/JounceTx)  as
channels  for  the  distribution  of  information.  The  information  we  post  through  these  channels  may  be  deemed  material.  Accordingly,  investors  should
monitor these channels, in addition to following our press releases, Securities and Exchange Commission filings and public conference calls and webcasts.
The contents of our website and social media channels are not, however, a part of this report.

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Item 1. Business

Overview

PART I

We are a clinical-stage immunotherapy company dedicated to transforming the treatment of cancer by developing therapies that enable the immune system
to  attack  tumors  and  provide  long-lasting  benefits  to  patients.  Our  strategy  is  to  use  a  biomarker-driven  approach  from  discovery  through  clinical
development.  We  have  developed  a  suite  of  integrated  technologies  that  comprise  our  Translational  Science  Platform,  enabling  us  to  comprehensively
interrogate the cellular and molecular composition of tumors. By focusing on specific cell types, both immune and non-immune, within tumors, we can
prioritize targets and then identify related biomarkers designed to match the right therapy to the right patient. Our pipeline is focused on product candidates
to  address  PD-(L)1-inhibitor  resistant  and  PD-(L)1  inhibitor  sensitive  tumors,  which  represent  significant  opportunities  requiring  different  biological
approaches. We aim to develop product candidates that address the unmet medical need of patients in both of these populations.

Our highest priority program, JTX-8064, is being developed for patients with either PD-(L)1-inhibitor resistant or PD-(L)1 inhibitor sensitive tumors. JTX-
8064  is  the  first  tumor-associated  macrophage  candidate  to  emerge  from  our  Translational  Science  Platform.  JTX-8064  is  an  antibody  that  binds  to
Leukocyte Immunoglobulin Like Receptor B2, or LILRB2 (also known as ILT4), which is a cell surface receptor expressed on macrophages. In January
2021, we began enrollment in the INNATE trial, our Phase 1 dose-escalation clinical trial of JTX-8064 as a monotherapy and in combination with either
our  PD-1  inhibitor,  JTX-4014,  or  pembrolizumab  in  patients  with  advanced  solid  tumors.  Our  goal  is  to  advance  this  program  rapidly,  and,  as  a  result,
INNATE is a proof-of-concept trial that includes indication-specific expansion cohorts.

Vopratelimab is a clinical-stage monoclonal antibody that binds to and activates the Inducible T cell CO-Stimulator, or ICOS, a protein on the surface of
certain  T  cells  commonly  found  in  many  solid  tumors.  We  are  currently  enrolling  patients  in  the  SELECT  trial,  which  is  evaluating  vopratelimab  in
combination with JTX-4014, our anti-PD-1 antibody, compared to JTX-4014 alone in biomarker-selected, immunotherapy-naive second-line non-small cell
lung cancer, or NSCLC, patients. We identify patients for SELECT using TIS
, an 18 gene signature that includes genes relevant to both CD8 and CD4
T cell biology. TIS
  has  been  optimized  to  predict  for  emergence  of  ICOS  hi  CD4  T  cells  in  the  peripheral  blood,  which  have  been  associated  with
clinical benefit in patients treated with vopratelimab alone or in combination with nivolumab. SELECT is a randomized Phase 2 clinical trial outside the
United States, and we dosed the first patient in October 2020. Due to COVID-19-related delays, we now expect to report clinical data from SELECT in
2022.

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JTX-4014  is  a  clinical-stage  anti-PD-1  antibody  that  we  are  developing  primarily  for  potential  use  in  combination  with  our  product  candidates,  as  we
believe that combination therapy has the potential to be a mainstay of cancer immunotherapy. We presented safety and preliminary efficacy data from a
Phase  1  clinical  trial  of  JTX-4014  monotherapy  in  2019.  Based  on  the  results  of  that  clinical  trial,  we  are  using  JTX-4014  in  combination  with
vopratelimab in SELECT, and we plan to use JTX-4014 in combination with JTX-8064 in INNATE.

JTX-1811 is the most recent product candidate to emerge from our Translational Science Platform, and in August 2020, we entered into an agreement to
exclusively license JTX-1811 to Gilead Sciences, Inc., or Gilead. JTX-1811 is a monoclonal antibody that is designed to selectively deplete T regulatory
cells in the tumor microenvironment, or TME, by targeting a receptor called CCR8, which is preferentially expressed on intra-tumoral T regulatory cells.

With our biomarker-driven approach, we leverage our Translational Science Platform to interrogate cell types within the human TME and to identify and
prioritize targets across a broad spectrum of immune and non-immune cell types. In addition, early in the development process, we use our Translational
Science  Platform  to  identify  potential  predictive  biomarkers  to  enable  us  to  enrich  our  clinical  trials  for  patient  populations  that  may  be  more  likely  to
respond to a particular immunotherapy. Once clinical data is available for a product candidate, we then use a reverse translational approach to interrogate
tumor and blood samples from patients with known outcomes. By using these reverse translational findings, we believe we are better able to design clinical
trials  and  more  efficiently  develop  cancer  immunotherapies  that  potentially  provide  greater  benefit  to  patients.  We  believe  that  the  biomarker  results,
coordinated  to  clinical  response,  will  assist  with  determining  the  utility  of  proceeding  to  the  use  of  a  companion  diagnostic  and/or  complementary
diagnostic for a given therapy.

Our Strategy

We  aim  to  build  a  multi-product  company  that  discovers,  develops  and  commercializes  first-in-class  and/or  best  in  class  novel  therapeutics  and
combination approaches for patients who are less likely to respond, or who have experienced limited or no response, to currently-approved therapies. Key
elements of our strategy include:

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Aggressively develop our product candidates, and potential future product candidates, using a biomarker-driven approach and reverse translational
analysis aimed at bringing the right immunotherapy to the right patients;

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Continue  investment  in  our  Translational  Science  Platform  to  enhance  our  understanding  of  the  TME,  as  we  look  to  broaden  the  benefit  of
immunotherapy through targeting additional cell types;

Address  the  unmet  need  of  cancer  patients  with  tumors  unresponsive  to  T  effector  cell-directed  therapies  by  focusing  our  discovery  efforts  on
other cell types within the TME; and

Expand our pipeline by leveraging our internal discovery platform and/or in-licensing new technologies, product candidates and methodologies.

Immuno-Oncology Overview

Historically,  cancer  treatments  have  focused  on  either  killing  or  arresting  the  proliferation  of  the  tumor  cells  themselves.  However,  fundamental  work
pioneered by one of our founders, Dr. James Allison, led to the discovery of one of the first immune cell checkpoint therapies. In 2018, Dr. Allison was
awarded the Nobel Prize in Physiology or Medicine for his work related to the discovery of cancer therapy by inhibition of negative immune regulation.
Immune checkpoint inhibitors show promise in treating various cancers, including immunotherapies that bind to the PD-1 or PD-L1 receptor on certain T
cells, and are approved in multiple cancer types and across different lines of therapy.

Even with the success of these antibodies that bind to PD-1 or PD-L1, known as PD-1 checkpoint inhibitors, there is still a significant unmet medical need
for patients who fail to respond to or respond and later relapse on these therapies. The interplay between the immune system and cancer is dynamic and as
more patients, in an expanded set of indications, are being exposed to cancer immunotherapies we are learning about the factors that may contribute to a
lack of response or a failed response. Biological approaches—beyond those focused on CD8 biology—may be needed to address the unmet medical need
of cancer patients who do respond to and relapse after receiving PD-1 checkpoint inhibitors. Reasons for resistance to immunotherapy may include a lack
of appropriate immune cells in the TME, such as the absence of T effector cells, or the presence of immunosuppressive cells, such as T regulatory cells or
tumor associated macrophages. Additionally, a tumor may initially respond to a PD-1 checkpoint inhibitor, but other immune checkpoints may emerge or
an acquired resistance to the particular immunotherapy may occur, for example through genetic alterations in key T cell signaling pathways. In these cases,
therapeutic  approaches  that  utilize  new  mechanisms  and  target  cell  types  other  than  T  effector  cells  within  the  TME  may  restore  or  broaden  the
applicability of cancer immunotherapies. We believe LILRB2 may function as an immune checkpoint for macrophages, and its activation, through ligand
binding, may suppress anti-tumor immune responses. We believe that by inhibiting LILRB2’s interaction with its ligands, our lead macrophage program,
JTX-8064, may have the potential to restore the activity of PD-1 checkpoint inhibitors in otherwise resistant settings. For patients who have benefited from
cancer  immunotherapies,  data  emerging  from  clinical  studies  with  PD-1  checkpoint  inhibitors  suggests  the  importance  of  a  biomarker-driven  patient-
enrichment strategy, like that used for pembrolizumab, in first-line NSCLC patients and in second line microsatellite-instability-high, or MSI-H, cancer
patient  populations.  Additional  highlights  of  the  evolving  immunotherapy  landscape  include  longer-lasting  responses  as  compared  to  chemotherapy  and
that these longer-lasting responses can be improved with combination therapy.

Our Translational Science Platform enables both the identification and prioritization of targets across a broad spectrum of immune and non-immune cell
types  and  the  identification  of  potential  biomarkers  to  inform  our  clinical  development  strategy.  We  believe  this  platform  may  position  us  to  address
multiple  pathways  and  indications,  including  those  that  may  be  important  in  colder  tumors,  and  to  identify  the  most  appropriate  indications  and  most
responsive patient populations for our new immunotherapies. By taking this dual approach, we believe we may be able to address areas of unmet need,
particularly in the combination setting.

The promise of long-lasting benefit to cancer patients has led to heightened enthusiasm for these types of immunotherapy products and the rapid expansion
of  the  market  opportunity.  The  current  market  for  PD-1/PD-L1  therapies  is  estimated  to  be  $33  billion,  and  the  overall  market  for  immunotherapy  is
expected to expand over the next five years, with a 2026 market size estimated to be $63 billion across solid and blood-based tumors according to market
reports.

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Our Product Pipeline

We are developing a pipeline of immunotherapies that we believe will provide a meaningful and long-lasting benefit to cancer patients. We plan to develop
each of these as a single agent and/or in combination with other therapies, as applicable. The following table depicts our current pipeline:

Development Programs

JTX-8064: An Anti-LILRB2 (ILT4) Monoclonal Antibody Designed to Reprogram Macrophages

JTX-8064  is  a  humanized  IgG4,  anti-LILRB2  monoclonal  antibody  designed  to  reprogram  macrophages.  Specifically,  it  binds  to  Leukocyte
Immunoglobulin Like Receptor B2 (LILRB2/ILT4) and block interactions with its ligands. We are currently assessing JTX-8064 in INNATE, a Phase 1
clinical  study  of  JTX-8064  as  a  monotherapy  and  in  combination  with  either  JTX-4014  or  pembrolizumab.  We  began  enrolling  patients  in  INNATE  in
January  2021,  and  indication-specific  expansion  cohorts  are  planned  in  this  proof-of-concept  trial.  INNATE  will  assess  pharmacodynamic  and  potential
predictive biomarkers with the aim of informing the future clinical development of JTX-8064.

JTX-8064 is the first tumor-associated macrophage candidate developed from our Translational Science Platform. When LILRB2 binds to HLA molecules,
including HLA-G, on cancer cells and macrophages, it induces an immunosuppressive state in the macrophages. In preclinical studies, JTX-8064 inhibited
this  immunosuppressive  interaction,  reprogramming  the  macrophages  to  a  more  immuno-stimulatory  state.  We  believe  therapies  targeting  these  innate
immune cells may have the potential to benefit patients with tumors that are less likely to respond to existing T cell-focused approaches.

Vopratelimab: An Anti-ICOS Monoclonal Antibody Immunotherapy

Vopratelimab  is  a  clinical-stage  monoclonal  antibody  that  binds  to  and  activates  ICOS,  a  protein  on  the  surface  of  certain  T  cells.  We  believe  that
vopratelimab’s mechanism of action engages CD4 T cells and enables a different element of the immune response than PD-1 checkpoint inhibitors, which
act primarily on CD8 T cells. The design of our ongoing Phase 2 SELECT clinical trial was informed by data suggesting that high expression of ICOS per
T  cell  is  necessary  for  vopratelimab  to  drive  the  activation  of  T  effector  cells.  SELECT  aims  to  determine  whether  vopratelimab  can  enhance  the
therapeutic benefit of PD-1 inhibitors in TIS

 biomarker-selected patients.

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We initiated SELECT in October 2020 to assess vopratelimab in combination with JTX-4014 compared to JTX-4014 alone. SELECT is a randomized trial
 biomarker is a baseline tumor
outside the United States with TIS
RNA signature with a threshold optimized for the emergence of

 biomarker-selected, immunotherapy-naive second-line NSCLC patients. The TIS

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peripheral  ICOS  hi  CD4  T  cells,  a  vopratelimab  pharmacodynamic  biomarker  associated  with  clinical  benefit  and  not  associated  with  PD-1  inhibitor
 through a reverse translational analysis of tumor biopsies in a subset of patients in our ICONIC Phase 1/2 clinical trial, in
therapy. We identified TIS
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whom CD4 T cell populations were analyzed for ICOS levels. This indicated an association between the emergence of ICOS hi CD4 T cells and TIS
.
was applied retrospectively to clinical outcomes, it also appeared predictive of improved response rate, six- and nine-month progression free
When TIS
  has  the  potential  to  identify  patients  who  may  be  more  responsive  to
survival  and  overall  survival.  We  believe  selecting  patients  by  using  TIS
vopra
vopratelimab, and those who may be more responsive to JTX-4014. Although both trial arms may benefit from TIS
 patient selection, the SELECT trial
is  powered  to  demonstrate  the  statistical  superiority  of  vopratelimab  plus  JTX-4014  compared  to  JTX-4014  alone.  Due  to  delays  attributable  to  the
COVID-19 pandemic, we now expect to report clinical data from SELECT in 2022.

vopra

We  also  assessed  vopratelimab  in  two  Phase  2  trials,  EMERGE  and  ICONIC.  Although  neither  EMERGE  nor  ICONIC  met  pre-specified  criteria  for
continuation of enrollment in the patient populations studied, this clinical data informed the biomarker approach we are using in SELECT. We intend to
follow the EMERGE patients still on study and complete the analysis of biomarker data. In ICONIC, all responders remained on study for more than one
year,  including  three  responders  to  vopratelimab  plus  nivolumab  who  have  remained  on  study  for  more  than  three  years.  These  responses  were
accompanied  by  persistence  of  high  levels  of  ICOS  hi  CD4  T  cells  in  the  blood.  Response  rate,  progression  free  survival,  and  overall  survival  were
improved in patients with on-treatment emergence of ICOS hi CD4 T cells, whom we refer to as ICOS hi, compared with those patients without the cells,
whom  we  refer  to  as  ICOS  lo,  and  with  the  overall  study  population.  Furthermore,  in  a  separate  analysis  of  blood  samples  from  responding  and  non-
responding patients who received PD-1 checkpoint inhibitor monotherapy treatment, no emergence of ICOS hi CD4 T cells was observed, suggesting that
the emergence of this cell population is attributable to activity of vopratelimab. Vopratelimab demonstrated an acceptable safety profile in these trials.

JTX-4014: An Anti-PD-1 Antibody for Combination Therapy

Combination  therapy  aimed  at  multiple  targets  has  become  an  important  element  of  immunotherapy  development  efforts  with  the  goal  of  creating
improved, long-lasting responses. PD-1 checkpoint inhibitors are anticipated to play a key role in combination therapies. For this reason, we are developing
our own anti-PD-1 antibody, JTX-4014, primarily for use in combination with future product candidates. We believe this will give us greater flexibility to
develop our pipeline of therapies. For example, in SELECT, our goal is to evaluate the efficacy of JTX-4014 alone and in combination with vopratelimab in
a biomarker-selected patient population. Additionally, we plan to use JTX-4014 in combination with JTX-8064 in INNATE.

At the November 2019 meeting of the Society for Immunotherapy of Cancer, we reported safety and preliminary efficacy data from our Phase 1 clinical
trial  of  JTX-4014.  JTX-4014  demonstrated  an  acceptable  safety  profile  based  on  a  6-cohort  dose-escalation  trial.  Response  Evaluation  Criteria  in  Solid
Tumors, or RECIST, responses were observed in three of 18 patients, including one complete response and two partial responses.

JTX-1811: An Anti-CCR8 Monoclonal Antibody Designed to Deplete Tumor T regulatory Cells

JTX-1811 is the most recent product candidate to emerge from our Translational Science Platform, and, in October 2020, we entered into an agreement to
exclusively license JTX-1811 to Gilead Sciences, Inc., or Gilead. JTX-1811 is an anti-CCR8 monoclonal antibody designed to selectively deplete intra-
tumoral T regulatory cells in the TME. T regulatory cells suppress anti-tumor immune responses, and by depleting these immunosuppressive cells, we aim
to  foster  more  productive  immune  responses  within  the  tumor  microenvironment.  Therapies  targeting  T  regulatory  cells  may  play  an  important  role  in
addressing the growing unmet need in cancer patients who do not respond to currently-approved immunotherapies and these T regulatory cell therapies
may have the potential to complement existing approaches that focus on T effector cells. We are currently conducting IND-enabling activities for JTX-
1811, with the goal of filing an investigational new drug application, or IND, in the first half of 2021. Under the terms of our agreement, we will advance
JTX-1811 until the clearance of an IND application or an earlier date specified by Gilead, at which time the program will be transitioned to Gilead.

Discovery Programs

With our focus on bringing the right immunotherapy to the right patients, we continue to invest in our Translational Science Platform as we believe that the
systematic interrogation of the immune make-up of human tumors gives us the ability to target different cell types within the TME beyond the T effector
cells that are the focus of currently-approved therapies. We can also use our Translational Science Platform and biomarker efforts to inform our clinical
strategy  by  identifying  specific  patient  populations  within  or  across  different  types  of  cancer.  This  may  enable  us  to  fully  exploit  the  promise  of
immunotherapy in cancer by allowing us to pursue tumor types not currently served by therapies that target the T effector arm of the adaptive immune
system, as well as potentially convert the TME from an immunosuppressive environment to an immune activating environment and tailor our approach to
both PD-(L)1-inhibitor resistant and PD-(L)1-inhibitor sensitive tumors.

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Analysis  of  The  Cancer  Genome  Atlas  using  our  proprietary  gene  signatures,  which  represent  various  immune  cells,  shows  that  the  immune  cell
composition of tumors is diverse, both across and within indications. This analysis suggests that a significant number of tumors, including cold tumors in
particular, may not benefit from the current T cell focused immunotherapies, such as PD-1 checkpoint inhibitors.

We are leveraging our Translational Science Platform to systematically and comprehensively interrogate cell types within the TME, including myeloid cells
such as macrophages, T regulatory cells and non-immune cells, such as stromal cells, with the goal of enabling us to develop therapies for patients who
have yet to benefit from immunotherapies.

License Agreements

Gilead License Agreement

On  August  31,  2020,  we  entered  into  an  exclusive  license  agreement  with  Gilead,  or  the  Gilead  License  Agreement,  granting  Gilead  a  worldwide  and
exclusive license to develop, manufacture and commercialize JTX-1811 and certain derivatives thereof, as well as backup antibodies defined within the
agreement. Concurrently with the license agreement, we entered into a stock purchase agreement with Gilead, or the Stock Purchase Agreement, and a
registration rights agreement. The agreements with Gilead were subject to review under the Hart-Scott Rodino Antitrust Improvements Act of 1976 and
other customary closing conditions, and became effective on October 16, 2020, the closing date of the transaction.

Under  the  terms  of  the  Gilead  License  Agreement  and  Stock  Purchase  Agreement,  Gilead  paid  us  a  one-time,  non-refundable  upfront  payment  of
$85.0  million  and  $35.0  million  for  an  equity  investment.  Under  the  terms  of  our  agreement,  we  will  advance  JTX-1811  until  the  clearance  of  an  IND
application or an earlier date specified by Gilead, at which time the program will be transitioned to Gilead. We are entitled to receive payments from Gilead
upon the achievement of specified clinical, regulatory and sales milestones, including potential clinical development and regulatory milestone payments up
to an aggregate total of $510.0 million and potential sales milestone payments up to an aggregate total of $175.0 million. We are also eligible to receive
tiered royalty payments based on a percentage of annual worldwide net sales ranging from the high-single digits to mid-teens, based on future annual net
sales of licensed products, on a licensed product-by-licensed product and country-by-country basis.

Unless  terminated  earlier  in  accordance  with  its  terms,  the  Gilead  License  Agreement  provides  that  it  will  expire  (i)  on  a  licensed  product-by-licensed
product and country-by-country basis on the date of the expiration of the royalty term with respect to such licensed product in such country and (ii) in its
entirety upon the expiration of all applicable royalty terms with respect to the licensed products in all countries, following which the applicable licenses
under  the  Gilead  License  Agreement  will  become  fully  paid-up,  perpetual,  irrevocable  and  royalty-free.  Gilead  may  terminate  the  Gilead  License
Agreement for convenience, in its sole discretion, in its entirety or on a product-by-product or region-by-region basis, at any time with prior written notice
to us.

Celgene License Agreement

On July 22, 2019, we entered into an exclusive license agreement with Celgene, or the Celgene License Agreement, granting Celgene a worldwide and
exclusive license to develop, manufacture and commercialize JTX-8064 and certain derivatives thereof, as well as any antibody or other biologic controlled
by us that is specifically directed to the LILRB2 receptor. Under the terms of the Celgene License Agreement, Celgene paid us a one-time, non-refundable
upfront payment of $50.0 million.

Celgene was subsequently acquired by Bristol Myers Squibb, or BMS, in November 2019. As part of its Celgene integration process, BMS streamlined its
pipeline  to  address  areas  of  overlap.  As  a  result,  Celgene  terminated  the  Celgene  License  Agreement  effective  June  3,  2020,  or  the  Celgene  License
Agreement  Termination  Date.  As  of  the  Celgene  License  Agreement  Termination  Date,  we  have  sole  worldwide  rights  to  JTX-8064,  and  all  of  our
intellectual property rights pertaining to JTX-8064 were reacquired by us.

Manufacturing

We rely on and will continue to rely on our contract manufacturing organizations, or CMOs, for both drug substance and drug product. While we do not
plan  to  develop  our  own  full-scale  manufacturing  capabilities,  we  may  consider  establishing  a  small,  flexible  approach  for  supporting  preclinical  IND-
enabling studies and early clinical trials. As of now, all of our manufacturing is outsourced to well-established third-party manufacturers. We have entered
into long-term contracts with CMOs for drug supply of JTX-8064, vopratelimab and JTX-4014.

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Competition

The  biotechnology  and  pharmaceutical  industries,  and  the  immunotherapy  subsector,  are  characterized  by  rapid  evolution  of  technologies,  fierce
competition  and  strong  defense  of  intellectual  property.  While  we  believe  that  our  product  candidates,  discovery  programs,  technology,  knowledge,
experience,  and  scientific  resources  provide  us  with  competitive  advantages,  we  face  competition  from  major  pharmaceutical  and  biotechnology
companies, academic institutions, governmental agencies and public and private research institutions, among others.

Any  product  candidates  that  we  successfully  develop  and  commercialize  will  compete  with  currently-approved  therapies  and  new  therapies  that  may
become available in the future. Key product features that would affect our ability to effectively compete with other therapeutics include the efficacy, safety
and  convenience  of  our  products  and  the  ease  of  use  and  effectiveness  of  any  companion  diagnostics  and/or  complementary  diagnostics.  Potentially
competitive therapies fall primarily into the following groups of treatment:

•

•

•

•

•

•

•

•

traditional cancer therapies, including chemotherapy and targeted therapies;

a clinical-stage anti-ILT4 (LILRB2) antibody program, MK-4830, in clinical trials being developed by Merck & Co., Inc., or Merck;

three  clinical-stage  anti-ICOS  agonist  antibody  programs  in  clinical  trials,  being  developed  by  BMS,  GlaxoSmithKline  plc  and  Kymab  Group
Ltd.;

a bispecific anti-ICOS and anti-PD-1 antibody program in clinical development being developed by Xencor, Inc.;

approved immunotherapy antibodies, including an approved anti-CTLA 4 antibody (Yervoy , marketed by BMS) and approved anti-PD-1/anti-
PD-L1  antibodies  (Bavencio ,  Keytruda ,  Libtayo ,  Opdivo ,  Tecentriq ,  and  Imfinzi ,  marketed  by  Merck  KGaA  and  Pfizer,  Inc.,  Merck,
Regeneron Pharmaceuticals, Inc., BMS, Genentech, Inc. and AstraZeneca PLC, respectively);

®

®

®

®

®

®

®

anti-PD-1/anti-PD-L1 immunotherapy antibodies in clinical development;

other agonist immunotherapy antibodies in clinical development; and

antibody-drug  conjugates  and  therapies  targeting  T  regulatory  cells  and  B  cells,  macrophages  and  other  immune  cell  types  that  are  in  clinical
development.

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

Many  of  the  companies  against  which  we  may  compete,  either  alone  or  with  their  strategic  partners,  have  significantly  greater  financial  resources  and
expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals and marketing approved
products than we do. These competitors also compete with us in recruiting and retaining qualified scientific and management personnel and establishing
clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

Intellectual Property

Our intellectual property is critical to our business and we strive to protect it, including by obtaining and maintaining patent protection in the United States
and internationally for our product candidates, novel biological discoveries, including new targets and applications, and other inventions that are important
to our business. For our product candidates, generally we intend to first pursue patent protection covering both compositions of matter and methods of use.
As we continue the development of our product candidates, we intend to identify additional means of obtaining patent protection that would potentially
enhance  commercial  success,  including  through  additional  methods  of  use  and  biomarker  and  companion  diagnostic  and/or  complementary  diagnostic
related claims.

The patent positions of biotechnology companies like ours are generally uncertain and involve complex legal, scientific and factual questions. In addition,
the  coverage  claimed  in  a  patent  application  can  be  significantly  reduced  before  the  patent  is  issued,  and  its  scope  can  be  reinterpreted  after  issuance.
Consequently, we may not obtain or maintain adequate patent protection for any of our product candidates. As of February 19, 2021, with respect to JTX-
8064 patent rights, we own one pending U.S. non-provisional application, twenty-one pending foreign patents and patent applications within one patent
family that covers compositions of matter and methods of use, and we own one issued U.S. patent that covers methods of use. As of February 19, 2021,
with  respect  to  vopratelimab  patent  rights,  we  own  three  pending  U.S.  provisional  patent  applications,  five  pending  U.S.  non-provisional  applications,
twenty-seven pending foreign patents and patent applications, and five pending

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Patent Cooperation Treaty, or PCT, patent applications within ten patent families that cover compositions of matter and methods of use and ICOS-related
biomarkers, and we own two issued U.S. patents and five issued foreign patents that cover compositions of matter and methods of use. As of February 19,
2021, with respect to JTX-4014 patent rights, we own one pending U.S. non-provisional application, seventeen pending foreign patent applications, and
one pending PCT application within two patent families that cover compositions of matter and methods of use, and we own one issued U.S. patent and one
issued foreign patent that covers compositions of matter and methods of use.

We cannot predict whether the patent applications we pursue will issue as patents in any particular jurisdiction or whether the claims of any issued patents
will provide any proprietary protection from competitors. Even if our pending patent applications are granted as issued patents, those patents, as well as any
patents we license from third parties, may be challenged, circumvented or invalidated by third parties.

In addition, we exclusively in-licensed a patent portfolio from Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center and
Memorial Hospital for Cancer, or MSK, and University of Texas MD Anderson Cancer Center, or MD Anderson, consisting of four issued U.S. patents,
one issued Australian patent, one issued Japanese patent, one issued Canadian patent, two issued Chinese patents, one issued European patent that has been
validated  in  thirteen  European  jurisdictions,  one  pending  U.S.  patent  application,  and  two  pending  foreign  patent  applications.  This  licensed  patent
portfolio  covers  methods  related  to  the  use  of  an  ICOS  agonist  in  combination  with  blocking  agents  of  certain  T  cell  inhibitory  receptors.  The  issued
patents and the pending patent applications (if issued) licensed from MSK and MD Anderson, if the appropriate maintenance, renewal, annuity or other
governmental fees are paid, are expected to expire in 2030, excluding any additional term for patent term adjustments or patent term extensions.

The term of individual patents depends upon the legal term of the patents in the countries in which they are obtained. In most countries in which we file,
the patent term is 20 years from the earliest date of filing a non-provisional patent application. In the United States, the patent term that covers an FDA-
approved drug may also be eligible for patent term extension, which permits patent term restoration as compensation for the patent term lost during the
FDA regulatory review process. The Hatch-Waxman Act permits a patent term extension of up to five years beyond the expiration of the patent. The length
of the patent term extension is related to the length of time the drug is under regulatory review. Patent term extension cannot extend the remaining term of a
patent beyond a total of 14 years from the date of product approval and only one patent applicable to an approved drug may be extended. Similar provisions
are available in Europe and other foreign jurisdictions to extend the term of a patent that covers an approved drug. In the future, if and when our products
receive FDA approval, we expect to apply for patent term extensions on patents covering those products. We plan 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 if granted, the length of such extensions.

We also rely on unpatented know-how, inventions and other proprietary information relating to JTX-8064, vopratelimab, JTX-4014, JTX-1811, our future
product candidates and our Translational Science Platform. We seek to protect and maintain the confidentiality of proprietary information to protect aspects
of our business that are not amenable to, or that we do not consider appropriate for, patent protection. Although we take steps to protect our proprietary
information  and  trade  secrets,  including  through  contractual  means  with  our  employees  and  consultants,  third  parties  may  independently  develop
substantially equivalent proprietary information and techniques or otherwise gain access to our trade secrets or disclose our technology. Thus, we may not
be  able  to  meaningfully  protect  our  trade  secrets.  It  is  our  policy  to  require  our  employees,  consultants,  outside  scientific  collaborators,  sponsored
researchers and other advisors to execute confidentiality agreements upon the commencement of employment or consulting relationships with us. These
agreements  provide  that  all  confidential  information  concerning  our  business  or  financial  affairs  developed  or  made  known  to  the  individual  during  the
course of the individual’s relationship with us is to be kept confidential and not disclosed to third parties except in specific circumstances. Our agreements
with  employees  also  provide  that  all  inventions  conceived  by  the  employee  in  the  course  of  employment  with  us  or  from  the  employee’s  use  of  our
confidential information are our exclusive property. However, such confidentiality agreements and invention assignment agreements can be breached, and
we may not have adequate remedies for any such breach. For a more comprehensive discussion of the risks related to our intellectual property, please see
“Risk Factors—Risks Related to Intellectual Property.”

Exclusive License Agreement with Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center, and Memorial Hospital
for Cancer and Allied Diseases

In  September  2015,  we  amended  and  restated  an  exclusive  license  agreement  from  December  2013  with  MSK.  Pursuant  to  this  amended  and  restated
license agreement, MSK and MD Anderson granted to us a worldwide exclusive license under certain patents to manufacture, develop and commercialize
certain products and services, including those products for which the use in combination with another product for the treatment of any disease is covered by
such patents (including, potentially, vopratelimab), and to practice certain methods covered by the patents. Under the license agreement, we are obligated to
use

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commercially reasonable efforts to commercialize at least one licensed product or licensed service as defined in the license agreement.

In  connection  with  the  license  agreement,  we  issued  to  MSK  and  MD  Anderson  an  aggregate  of  60,974  shares  of  our  common  stock.  We  also  paid  an
upfront license fee of $30,000 to MSK and MD Anderson. Commencing on the third anniversary of the effective date of the license agreement, we must
pay  an  annual  maintenance  fee  ranging  in  the  mid-four  figures  to  the  mid-five  figures.  The  annual  maintenance  fee  is  fully  credited  against  the  royalty
payments  for  the  same  year  or  any  subsequent  year  or  any  other  amount  due  under  the  license  agreement.  We  are  obligated  to  pay  MSK  milestone
payments of up to $3,475,000 for the first and second licensed products to achieve certain development and marketing approval milestones, including up to
$2,725,000 for the first licensed product to achieve such developmental and marketing approval milestones. On a country-by-country basis and licensed
product-by-licensed product or licensed service-by-licensed service basis, we are also obligated to pay MSK a low single-digit percentage royalty on net
sales  of  licensed  products  or  licensed  services,  to  the  extent  used  in  combination  with  another  product  for  the  treatment  of  any  disease  covered  by  the
applicable patents, until the earlier of the expiration of the last valid patent claim covering such licensed product or licensed service in such country or
twelve  years  after  the  first  commercial  sale  of  such  licensed  product  or  licensed  service  in  such  country.  If  we  sublicense  our  rights  under  our  license
agreement with MSK, we would be obligated to pay MSK a low double-digit percentage royalty of the total gross proceeds we receive in consideration of
the grant of the sublicense, excluding royalties, research and development funding, payments for equity or debt securities and certain other expenses we
have incurred that are reimbursed by the sublicensee.

Unless terminated earlier, the license agreement expires on the date that we no longer have any royalty payment obligations under the license agreement.
We may terminate the license agreement for convenience in its entirety upon 30 days’ prior written notice to MSK and MD Anderson. Either party may
terminate the license agreement in its entirety in the event of an uncured material breach or the bankruptcy, insolvency, dissolution or winding up of the
other  party  which  is  not  dismissed  or  cured  within  a  set  period  of  time.  If  we  terminate  the  license  agreement  because  of  MSK’s  and  MD  Anderson’s
uncured breach or insolvency, we will retain a non-exclusive, perpetual, irrevocable, fully paid-up, royalty-free worldwide license to the licensed patents.
Upon expiration of our obligation to pay royalties for a licensed product or service in a country, our license to the licensed patents for such licensed product
or service will become exclusive, perpetual, irrevocable, fully paid-up and royalty-free in such country.

Government Regulation

Government  authorities  in  the  United  States  at  the  federal,  state  and  local  level  and  in  other  countries  regulate,  among  other  things,  the  research,
development,  testing,  manufacture,  quality  control,  approval,  labeling,  packaging,  storage,  record-keeping,  promotion,  advertising,  sales,  pricing,
reimbursement, distribution, post-approval monitoring and reporting, marketing and export and import of drug and biological products, such as JTX-8064,
vopratelimab,  JTX-4014,  JTX-1811  and  future  product  candidates.  Generally,  before  a  new  drug  or  biologic  can  be  marketed,  considerable  data
demonstrating its quality, safety and efficacy must be obtained, organized into a format specific for each regulatory authority, submitted for review and
approved by the regulatory authority.

U.S. Drug Development

In the United States, the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act, or FDCA, and its implementing regulations and regulates
biologics under the FDCA, the Public Health Service Act, or PHSA, and their implementing regulations. Both drugs and biologics also are subject to other
federal,  state  and  local  statutes  and  regulations.  The  process  of  obtaining  regulatory  approvals  and  the  subsequent  compliance  with  appropriate  federal,
state,  local  and  foreign  statutes  and  regulations  requires  the  expenditure  of  substantial  time  and  financial  resources.  The  failure  to  comply  with  the
applicable  U.S.  requirements  at  any  time  during  the  product  development  process,  approval  process  or  post-market  may  subject  an  applicant  to
administrative or judicial sanctions. These sanctions could include, among other actions, the FDA’s refusal to approve pending applications, withdrawal of
an approval, a clinical hold, untitled or warning letters, product recalls or market withdrawals, product seizures, total or partial suspension of production or
distribution,  injunctions,  fines,  refusals  of  government  contracts,  restitution,  disgorgement  and  civil  or  criminal  penalties.  Any  agency  or  judicial
enforcement action could have a material adverse effect on us.

JTX-8064, vopratelimab, JTX-4014, JTX-1811 and future product candidates must be approved by the FDA through either a New Drug Application, or
NDA, or Biologics License Application, or BLA, process before they may be legally marketed in the United States. We expect JTX-8064, vopratelimab,
JTX-4014, JTX-1811 and future product candidates to be regulated by the FDA as biologics and require the submission of a BLA prior be being marketed
in the United States. The process generally involves the following:

•

completion of extensive preclinical studies in accordance with applicable regulations, including studies conducted in accordance with good
laboratory practice, or GLP, requirements;

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•

•

•

•

•

•

•

•

•

submission to the FDA of an IND application, which must become effective before human clinical trials may begin;

approval by an independent institutional review board, or IRB, or ethics committee at each clinical trial site before each trial may be initiated;

performance of adequate and well-controlled human clinical trials in accordance with applicable IND regulations, good clinical practice, or GCP,
requirements and other clinical trial-related regulations to establish the safety and efficacy of the investigational product for each proposed
indication;

submission to the FDA of an NDA or BLA;

determination by the FDA within 60 days of its receipt of an NDA or BLA to accept the filing for review;

satisfactory completion of an FDA pre-approval inspection of the manufacturing facility or facilities where the drug or biologic will be produced
to assess compliance with current good manufacturing practices, or cGMP, requirements to assure that the facilities, methods and controls are
adequate to preserve the drug or biologic’s identity, strength, quality and purity;

potential FDA audit of the preclinical and/or clinical trial sites that generated the data in support of the NDA or BLA;

FDA review and approval of the NDA or BLA, including consideration of the views of any FDA advisory committee, prior to any commercial
marketing or sale of the drug or biologic in the United States; and

compliance with any post-approval requirements, including the potential requirement to implement a Risk Evaluation and Mitigation Strategy, or
REMS, and the potential requirement to conduct post-approval studies.

Preclinical Studies and IND

The preclinical developmental stage generally involves laboratory evaluations of product chemistry, formulation and stability, as well as in vitro and animal
studies to evaluate toxicity, assess the potential for adverse events and, in some cases, establish a rationale for therapeutic use. The conduct of preclinical
studies is subject to federal regulations and requirements, including GLP regulations for safety/toxicology studies. An IND sponsor must submit the results
of the preclinical tests, together with manufacturing information, analytical data, any available clinical data or literature and plans for clinical trials, among
other  things,  to  the  FDA  as  part  of  an  IND.  An  IND  is  an  exemption  from  the  FDCA  that  allows  an  unapproved  product  candidate  to  be  shipped  in
interstate commerce for use in an investigational clinical trial and a request for FDA authorization to administer such investigational product to humans.
Some long-term preclinical testing, such as animal tests of reproductive adverse events and carcinogenicity, may continue after the IND is submitted. An
IND automatically becomes effective 30 days after receipt by the FDA, unless before that time, the FDA raises concerns or questions related to one or more
proposed clinical trials and places the trial on clinical hold. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the
clinical trial can begin. As a result, submission of an IND may not result in the FDA allowing clinical trials to commence.

Following commencement of a clinical trial under an IND, the FDA may also place a clinical hold or partial clinical hold on that trial. Clinical holds are
imposed  by  the  FDA  whenever  there  is  concern  for  patient  safety  and  may  be  a  result  of  new  data,  findings,  or  developments  in  clinical,  non-clinical,
and/or chemistry, manufacturing, and controls. A clinical hold is an order issued by the FDA to the sponsor to delay a proposed clinical investigation or to
suspend an ongoing investigation. A partial clinical hold is a delay or suspension of only part of the clinical work requested under the IND. For example, a
specific protocol or part of a protocol is not allowed to proceed, while other protocols may do so. Following issuance of a clinical hold or partial clinical
hold, an investigation may only resume after the FDA has notified the sponsor that the investigation may proceed. The FDA will base that determination on
information provided by the sponsor correcting the deficiencies previously cited or otherwise satisfying the FDA that the investigation can proceed.

Clinical Trials

The  clinical  stage  of  development  involves  the  administration  of  the  investigational  product  to  healthy  volunteers  or  patients  under  the  supervision  of
qualified investigators in accordance with GCP requirements, including the requirement that all research subjects provide their informed consent. 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 assess efficacy. Each protocol, and any subsequent amendments to the protocol, must be
submitted to the FDA as part of the IND. Furthermore, an IRB for each institution at which the clinical trial will be conducted must review and approve the
protocol before a clinical trial commences at such institution, approve the information regarding the trial and the consent form that must be provided to
each clinical trial subject or his or her legal representative and must monitor the clinical trial until completed. Additionally, some trials are overseen by an
independent  group  of  qualified  experts  organized  by  the  trial  sponsor,  known  as  a  data  safety  monitoring  board  or  committee.  This  group  provides
authorization as to whether or

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not a trial may move forward at designated check points based on available data from the study. There also are requirements governing the reporting of
ongoing clinical trials and completed clinical trial results to public registries.

Clinical trials generally are conducted in three sequential phases, known as Phase 1, Phase 2 and Phase 3, which may overlap.

•

•

•

Phase 1 clinical trials generally involve a small number of healthy volunteers or disease-affected patients who are initially exposed to a single dose
and then multiple doses of the product candidate. The primary purpose of these clinical trials is to assess the metabolism, pharmacologic action,
side effect tolerability and safety of the drug.

Phase 2 clinical trials involve studies in disease-affected patients to determine the dose required to produce the desired benefits. At the same time,
safety and further pharmacokinetic and pharmacodynamic information is collected, possible adverse effects and safety risks are identified, and a
preliminary evaluation of efficacy is conducted.

Phase 3 clinical trials generally involve a large number of patients at multiple sites and are designed to provide the data necessary to demonstrate
the effectiveness of the product for its intended use, its safety in use and to establish the overall benefit/risk relationship of the product and provide
an adequate basis for product approval. These trials may include comparisons with placebo and/or other comparator treatments. The duration of
treatment is often extended to mimic the actual use of a product during marketing.

Post-approval  trials,  sometimes  referred  to  as  Phase  4  clinical  trials,  may  be  conducted  after  initial  marketing  approval.  These  trials  are  used  to  gain
additional experience from the treatment of patients in the intended therapeutic indication.

Progress reports detailing the results of the clinical trials must be submitted at least annually to the FDA and written IND safety reports must be submitted
to the FDA and the investigators for serious and unexpected suspected adverse events, findings from animal or in vitro testing or other studies that suggest
a significant risk for human subjects and any clinically important increase in the rate of a serious suspected adverse reaction over that listed in the protocol
or investigator brochure.

Clinical trials may not be completed successfully within any specified period, if at all. The FDA or the sponsor may suspend or terminate a clinical trial at
any time on various grounds, including a finding that the research subjects or patients are being exposed to an unacceptable health risk. Similarly, an IRB
can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s requirements or
if the drug or biologic has been associated with unexpected serious harm to patients. Results from one trial are not necessarily predictive of results from
later  trials.  Concurrent  with  clinical  trials,  companies  usually  complete  additional  animal  studies  and  must  develop  additional  information  about  the
chemistry  and  physical  characteristics  of  the  drug  or  biologic  as  well  as  finalize  a  process  for  manufacturing  the  product  in  commercial  quantities  in
accordance  with  cGMP  requirements.  The  manufacturing  process  must  be  capable  of  consistently  producing  quality  batches  of  the  product  and,  among
other things, companies must develop methods for testing the identity, strength, quality and purity of the final product. Additionally, appropriate packaging
must be selected and tested, and stability studies must be conducted to demonstrate that JTX-8064, vopratelimab, JTX-4014, JTX-1811 and future product
candidates do not undergo unacceptable deterioration over their shelf life.

Information about clinical trials must be submitted within specific time frames to the National Institutes of Health, or NIH, for public dissemination on its
ClinicalTrials.gov  website.  Similar  requirements  for  posting  clinical  trial  information  are  present  in  the  European  Union  (EudraCT)  website:
https://eudract.ema.europa.eu/ and other countries, as well.

Expanded Access to an Investigational Drug for Treatment Use

Expanded  access,  sometimes  called  “compassionate  use,”  is  the  use  of  investigational  new  drug  products  outside  of  clinical  trials  to  treat  patients  with
serious or immediately life-threatening diseases or conditions when there are no comparable or satisfactory alternative treatment options. The rules and
regulations related to expanded access are intended to improve access to investigational drugs for patients who may benefit from investigational therapies.
FDA regulations allow access to investigational drugs under an IND by the company or the treating physician for treatment purposes on a case-by-case
basis for: individual patients (single-patient IND applications for treatment in emergency settings and non-emergency settings); intermediate-size patient
populations; and larger populations for use of the drug under a treatment protocol or Treatment IND Application.

On  December  13,  2016,  the  21st  Century  Cures  Act  established  (and  the  2017  Food  and  Drug  Administration  Reauthorization  Act  later  amended)  a
requirement that sponsors of one or more investigational drugs for the treatment of a serious disease(s) or condition(s) make publicly available their policy
for evaluating and responding to requests for expanded access for individual patients. Although these requirements were rolled out over time, they have
now come into full effect. This provision requires drug and biologic companies to make publicly available their policies for expanded access for individual
patient access to products intended for serious diseases. Sponsors are required to make such policies publicly available upon the earlier of initiation of a
Phase 2 or Phase 3 study; or 15 days after the drug or biologic receives designation as a breakthrough therapy, fast track product, or regenerative medicine
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In addition, on May 30, 2018, the Right to Try Act, was signed into law. The law, among other things, provides a federal framework for certain patients to
access certain investigational new drug products that have completed a Phase I clinical trial and that are undergoing investigation for FDA approval. Under
certain  circumstances,  eligible  patients  can  seek  treatment  without  enrolling  in  clinical  trials  and  without  obtaining  FDA  permission  under  the  FDA
expanded access program. There is no obligation for a drug manufacturer to make its drug products available to eligible patients as a result of the Right to
Try Act, but the manufacturer must develop an internal policy and respond to patient requests according to that policy.

NDA/BLA and FDA Review Process

The  results  of  preclinical  studies  and  clinical  trials,  together  with  other  detailed  information,  including  proposed  labeling,  chemistry  and  manufacturing
information, are submitted to the FDA as part of an NDA or BLA. The NDA or BLA is a request for approval to market the drug or biologic for one or
more specified indications and must contain proof of safety and efficacy for a drug or safety, purity and potency for a biologic. The FDA must approve the
NDA or BLA before a drug or biologic may be marketed in the United States.

Under  the  Prescription  Drug  User  Fee  Act,  or  PDUFA,  as  amended,  each  NDA  or  BLA  must  be  accompanied  by  a  user  fee.  Under  federal  law,  the
submission of most applications is subject to an application user fee, which for federal fiscal year 2021 is $2,875,842 for an application requiring clinical
data. The sponsor of an approved application is also subject to an annual program fee, which for fiscal year 2021 is $336,432. These fees may be increased
or decreased annually, and fee waivers, reductions or deferrals are available in certain circumstances.

The FDA reviews each NDA and BLA for administrative completeness and reviewability within 60 days following receipt by the FDA of the NDA or
BLA. If the submission is found to be complete, the FDA will file the NDA or BLA, triggering a full review. The FDA may refuse to file any NDA or BLA
that it deems incomplete or not properly reviewable at the time of submission. The established goal of the FDA is to review applications within ten months
of the filing date for a new molecular-entity NDA or original BLA and within six months from the filing date for a new molecular-entity NDA or original
BLA designated for priority review. The FDA does not always meet its goal dates for standard and priority NDAs or BLAs, and the review process is often
extended by FDA requests for additional information or clarification.

Before  approving  an  NDA  or  BLA,  the  FDA  may  inspect  the  manufacturing  facilities  for  the  new  product  and  will  not  approve  the  product  unless  the
facilities comply with cGMP requirements. The FDA may refer applications for novel drug products or drug products which present difficult questions of
safety or efficacy to an advisory committee, typically a panel that includes clinicians and other experts, for review, evaluation and a recommendation as to
whether the application should be approved and under what conditions, if any. The FDA is not bound by recommendations of an advisory committee, but it
considers such recommendations when making decisions on approval. Additionally, the FDA may audit data from clinical trials to ensure compliance with
GCP requirements and likely will reanalyze the clinical trial data, which could result in extensive discussions between the FDA and the applicant during
the review process. After the FDA evaluates an NDA or BLA, it will issue an approval letter or a Complete Response Letter. An approval letter authorizes
commercial marketing of the drug with specific prescribing information for specific indications. A Complete Response Letter describes additional work
that must be done before the application can be approved, such as requiring additional clinical data, additional pivotal Phase 3 clinical trial(s) and/or other
significant  and  time-consuming  requirements  related  to  clinical  trials,  preclinical  studies  or  manufacturing.  Even  if  such  data  and  information  are
submitted, the FDA may decide that the NDA or BLA does not satisfy the criteria for approval. Data obtained from clinical trials are not always conclusive
and the FDA may interpret data differently than we interpret the same data.

Orphan Drug Designation

Under the Orphan Drug Act, the FDA may grant orphan designation to a drug or biological product intended to treat a rare disease or condition, which is
generally a disease or condition that affects fewer than 200,000 individuals in the United States, or more than 200,000 individuals in the United States and
for which there is no reasonable expectation that the cost of developing and making the product available in the United States for this type of disease or
condition will be recovered from sales of the product.

Orphan  drug  designation  must  be  requested  before  submitting  an  NDA  or  BLA.  After  the  FDA  grants  orphan  drug  designation,  the  identity  of  the
therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Orphan drug designation does not convey any advantage in or shorten the
duration  of  the  regulatory  review  and  approval  process.  These  circumstances  are  where  another  product  shows  clinical  superiority  to  the  product  with
orphan drug exclusivity because it is shown to be safer, more effective or makes a major contribution to patient care. This is the case despite an earlier court
opinion holding that the Orphan Drug Act unambiguously required the FDA to recognize orphan exclusivity regardless of a showing of clinical superiority.

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If a product that has orphan designation subsequently receives the first FDA approval for the disease or condition for which it has such designation, the
product is entitled to orphan drug exclusivity, which means that the FDA may not approve any other applications to market the same drug for the same
indication for seven years from the date of such approval, except in limited circumstances.

Competitors may also receive approval of either a different product for the same indication or the same product for a different indication but that could be
used  off-label  in  the  orphan  indication.  Orphan  drug  exclusivity  also  could  block  the  approval  of  one  of  our  products  if  a  competitor  obtains  approval
before we do for the same product, as defined by the FDA, for the same indication we are seeking approval, or if one of our products is determined to be
contained within the scope of the competitor’s product for the same indication or disease. If one of our products designated as an orphan drug receives
marketing approval for an indication broader than that which is designated, it may not be entitled to orphan drug exclusivity. Orphan drug status in the
European Union has similar, but not identical, requirements and benefits.

Expedited Development and Review Programs

The  FDA  has  various  programs,  including  a  fast  track  program,  priority  review  and  accelerated  approval,  that  are  intended  to  expedite  or  facilitate  the
process  for  reviewing  new  drugs  and  biologics  that,  generally,  are  intended  to  treat  a  serious  or  life-threatening  condition,  demonstrate  the  potential  to
address unmet medical needs and that offer meaningful benefits over existing treatments. The fast track program is designed to facilitate the development
and review of drugs to treat serious or life-threatening diseases or conditions and fulfill unmet needs. Priority review is designed to give drugs that offer
major advances in treatment or provide treatment where no adequate therapy exists. The FDA will attempt to direct additional resources to the evaluation of
an application for a new drug or biologic designated for priority review in an effort to facilitate the review.

A candidate product may also be eligible for accelerated approval if it treats a serious or life-threatening condition and generally provides a meaningful
advantage over available therapies. In addition, the investigational product must demonstrate an effect on a surrogate endpoint that is reasonably likely to
predict clinical benefit or on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality, or IMM, which is reasonably likely to
predict  an  effect  on  IMM  or  other  clinical  benefit.  As  a  condition  of  approval,  the  FDA  may  require  that  a  sponsor  of  a  drug  or  biologic  receiving
accelerated approval perform adequate and well-controlled post-marketing clinical trials.

Additionally, a drug or biologic may be eligible for designation as a breakthrough therapy if the product is intended, alone or in combination with one or
more other drugs or biologics, to treat a serious or life-threatening condition and preliminary clinical evidence indicates that the product may demonstrate
substantial  improvement  over  currently  approved  therapies  on  one  or  more  clinically  significant  endpoints.  The  benefits  of  breakthrough  therapy
designation include the same benefits as fast track designation, plus intensive guidance from the FDA to ensure an efficient drug development program.
Fast  track  designation,  priority  review,  accelerated  approval  and  breakthrough  therapy  designation  do  not  change  the  standards  for  approval,  but  may
expedite the development or approval process.

Pediatric Information

Under the Pediatric Research Equity Act, an NDA or BLA or supplement to an NDA or BLA must contain data to assess the safety and efficacy of the drug
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 assessment must also support dosing and administration for each pediatric subpopulation for which the product is safe
and effective. The Food and Drug Administration Safety and Innovation Act, or FDASIA, requires the submission of a pediatric study plan prior to the
assessment  of  data,  which  must  contain  proposed  pediatric  study,  including  study  design  and  objectives,  any  deferral  or  waiver  requests,  and  any  other
information required by regulation. The FDA may grant deferrals for submission of pediatric data until after the approval of the drug for use in adults or
full or partial waivers from the pediatric data requirements. Additional requirements and procedures relating to deferral requests and requests for extensions
of deferrals are contained in FDASIA.

Post-marketing Requirements

Following approval of a new product, the manufacturer and the approved product are subject to continuing regulation by the FDA, including, among other
things, monitoring and record-keeping activities, reporting of adverse experiences, complying with promotion and advertising requirements, which include
restrictions on promoting drugs for unapproved uses or patient populations (known as “off-label use”) and limitations on industry-sponsored scientific and
educational activities.

The FDA strictly regulates marketing, labeling, advertising and promotion of products that are placed on the market. The FDA and other agencies actively
enforce the laws and regulations prohibiting the promotion of off label uses, and a company that is found to have improperly promoted off label uses may
be  subject  to  significant  liability.  If  a  company  is  found  to  have  promoted  off-label  uses,  it  may  become  subject  to  adverse  public  relations  and
administrative and judicial enforcement by the

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FDA, the Department of Justice, or the Office of the Inspector General of the Department of Health and Human Services, as well as state authorities.

The FDA may also place other conditions on approvals, including imposing limitations on the uses for which the product may be marketed, requiring that
warning statements be included in the product labeling, requiring that additional studies be conducted following approval as a condition of the approval,
imposing  restrictions  and  conditions  on  product  distribution,  prescribing  or  dispensing  in  the  form  of  a  REMS  or  otherwise  limiting  the  scope  of  any
approval. Product approvals may be withdrawn for non-compliance with regulatory requirements or if problems occur following initial marketing.

FDA regulations require that products be manufactured in specific approved facilities and in accordance with cGMP regulations. We rely, and expect to
continue  to  rely,  on  third  parties  for  the  production  of  clinical  and  commercial  quantities  of  our  products  in  accordance  with  cGMP  regulations.  These
manufacturers must comply with cGMP regulations that require, among other things, quality control and quality assurance, the maintenance of records and
documentation and the obligation to investigate and correct any deviations from cGMP. Manufacturers and other entities involved in the manufacture and
distribution of approved drugs or biologics are required to register their establishments with the FDA and certain state agencies. The discovery of violative
conditions,  including  failure  to  conform  to  cGMP  regulations,  could  result  in  enforcement  actions,  and  the  discovery  of  problems  with  a  product  after
approval may result in restrictions on a product, manufacturer or holder of an approved NDA or BLA, including recall.

Companion Diagnostics and Complementary Diagnostics

We believe that the success of our product candidates may depend, in part, on the development and commercialization of either a companion diagnostic or
complementary diagnostic. Companion diagnostics and complementary diagnostics can identify patients who are most likely to benefit from a particular
therapeutic product, identify patients likely to be at increased risk for serious side effects as a result of treatment with a particular therapeutic product, or
monitor  response  to  treatment  with  a  particular  therapeutic  product  for  the  purpose  of  adjusting  treatment  to  achieve  improved  safety  or  effectiveness.
Companion  diagnostics  and  complementary  diagnostics  are  regulated  as  medical  devices  by  the  FDA  and,  as  such,  require  either  clearance  or  approval
prior to commercialization. The level of risk combined with available controls to mitigate risk determines whether a companion diagnostic device requires
Premarket Approval Application approval or is cleared through the 510(k) premarket notification process. Under FDA guidance, for a novel therapeutic
product  for  which  a  companion  diagnostic  device  is  essential  for  the  safe  and  effective  use  of  the  product,  the  companion  diagnostic  device  should  be
developed and approved or 510(k)-cleared contemporaneously with the therapeutic. The use of the companion diagnostic device will be stipulated in the
labeling of the therapeutic product. This is also true for a complementary diagnostic, although it is not a prerequisite for receiving the therapeutic.

If safe and effective use of a therapeutic depends on an in vitro diagnostic, then the FDA generally will require approval or clearance of that diagnostic,
known  as  a  companion  diagnostic,  at  the  same  time  that  the  FDA  approves  the  therapeutic  product.  In  August  2014,  the  FDA  issued  final  guidance
clarifying  the  requirements  that  will  apply  to  approval  of  therapeutic  products  and  in vitro  companion  diagnostics.  According  to  the  guidance,  if  FDA
determines that a companion diagnostic device is essential to the safe and effective use of a novel therapeutic product or indication, FDA generally will not
approve the therapeutic product or new therapeutic product indication if the companion diagnostic device is not approved or cleared for that indication.
Approval  or  clearance  of  the  companion  diagnostic  device  will  ensure  that  the  device  has  been  adequately  evaluated  and  has  adequate  performance
characteristics in the intended population. The review of in vitro companion diagnostics in conjunction with the review of our therapeutic treatments for
cancer will, therefore, likely involve coordination of review by the FDA’s Center for Drug Evaluation and Research and the FDA’s Center for Devices and
Radiological Health Office of In Vitro Diagnostics Device Evaluation and Safety.

Other Regulatory Matters

Manufacturing, sales, promotion and other activities following product approval are also subject to regulation by numerous regulatory authorities in the
United States in addition to the FDA, including the Centers for Medicare & Medicaid Services, other divisions of the Department of Health and Human
Services, the Department of Justice, the Drug Enforcement Administration, the Consumer Product Safety Commission, the Federal Trade Commission, the
Occupational Safety & Health Administration, the Environmental Protection Agency and state and local governments.

For example, in the United States, sales, marketing and scientific and educational programs also must comply with state and federal fraud and abuse laws.
These laws include the federal Anti-Kickback Statute, which makes it illegal for any person, including a prescription drug manufacturer (or a party acting
on  its  behalf),  to  knowingly  and  willfully  solicit,  receive,  offer  or  pay  any  remuneration  that  is  intended  to  induce  or  reward  referrals,  including  the
purchase,  recommendation,  order  or  prescription  of  a  particular  drug,  for  which  payment  may  be  made  under  a  federal  healthcare  program,  such  as
Medicare or Medicaid.

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Although we would not submit claims directly to payors, manufacturers also can be held liable under the federal False Claims Act, which prohibits anyone
from knowingly presenting, or causing to be presented, for payment to federal programs (including Medicare and Medicaid) claims for items or services,
including drugs or biologics, that are false or fraudulent, claims for items or services not provided as claimed or claims for medically unnecessary items or
services. In addition, our future activities relating to the reporting of wholesaler or estimated retail prices for our products, the reporting of prices used to
calculate  Medicaid  rebate  information  and  other  information  affecting  federal,  state  and  third-party  reimbursement  for  our  products,  and  the  sale  and
marketing of our products, are subject to scrutiny under this law.

Pricing and rebate programs must comply with the Medicaid rebate requirements of the U.S. Omnibus Budget Reconciliation Act of 1990 and more recent
requirements  in  the  Affordable  Care  Act.  The  distribution  of  pharmaceutical  products  is  subject  to  additional  requirements  and  regulations,  including
extensive record-keeping, licensing, storage and security requirements intended to prevent the unauthorized sale of pharmaceutical products.

The failure to comply with any of these laws or regulatory requirements subjects us to possible legal or regulatory action. Depending on the circumstances,
failure  to  meet  applicable  regulatory  requirements  can  result  in  criminal  prosecution,  fines  or  other  penalties,  injunctions,  requests  for  recall,  seizure  of
products,  total  or  partial  suspension  of  production,  denial  or  withdrawal  of  product  approvals  or  refusal  to  allow  a  firm  to  enter  into  supply  contracts,
including  government  contracts.  Any  action  against  us  for  violation  of  these  laws,  even  if  we  successfully  defend  against  it,  could  cause  us  to  incur
significant legal expenses and divert our management’s attention from the operation of our business. Prohibitions or restrictions on sales or withdrawal of
future products marketed by us could materially affect our business in an adverse way.

Changes in regulations, statutes or the interpretation of existing regulations could impact our business in the future by requiring, for example: (i) changes to
our manufacturing arrangements; (ii) additions or modifications to product labeling; (iii) the recall or discontinuation of our products; or (iv) additional
record-keeping requirements. If any such changes were to be imposed, they could adversely affect the operation of our business.

U.S. Patent Term Restoration and Non-Patent Exclusivity

Depending upon the timing, duration and specifics of FDA approval of JTX-8064, vopratelimab, JTX-4014, JTX-1811 and future product candidates, some
of  our  U.S.  patents  may  be  eligible  for  limited  patent  term  extension  under  the  Drug  Price  Competition  and  Patent  Term  Restoration  Act  of  1984,
commonly referred to as the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit restoration of the patent term of up to five years as
compensation for patent term lost during product development and FDA regulatory review process. Patent term restoration, however, cannot extend the
remaining term of a patent beyond a total of 14 years from the product’s approval date. The United States Patent and Trademark Office, or USPTO, in
consultation with the FDA, reviews and approves the application for any patent term extension or restoration. In the future, we may apply for restoration of
patent term for our currently owned or licensed patents to add patent life beyond its current expiration date, depending on the expected length of the clinical
trials and other factors involved in the filing of the relevant NDA or BLA.

Market  exclusivity  provisions  under  the  FDCA  also  can  delay  the  submission  or  the  approval  of  certain  applications.  The  FDCA  provides  a  five-year
period of non-patent marketing exclusivity within the United States to the first applicant to gain approval of an NDA for a new chemical entity; a drug is a
new  chemical  entity  if  the  FDA  has  not  previously  approved  any  other  new  drug  containing  the  same  active  moiety,  which  is  the  molecule  or  ion
responsible for the action of the drug substance.

An abbreviated approval pathway for biological products shown to be biosimilar to, or interchangeable with, an FDA-licensed reference biological product
was created by the Biologics Price Competition and Innovation Act of 2009, or BPCI Act, as part of the Affordable Care Act. Biosimilarity, which requires
that the biological product be highly similar to the reference product notwithstanding minor differences in clinically inactive components and that there be
no clinically meaningful differences between the product and the reference product in terms of safety, purity and potency, can be shown through analytical
studies, animal studies and a clinical trial or trials. Complexities associated with the larger, and often more complex, structure of biological products as
compared to small molecule drugs, as well as the processes by which such products are manufactured, pose significant hurdles to implementation that are
still being worked out by the FDA.

A reference biological product is granted twelve years of data exclusivity from the time of first licensure of the product, and the FDA will not accept an
application  for  a  biosimilar  or  interchangeable  product  based  on  the  reference  biological  product  until  four  years  after  the  date  of  first  licensure  of  the
reference  product.  “First  licensure”  typically  means  the  initial  date  the  particular  product  at  issue  was  licensed  in  the  United  States.  It  is  necessary  to
determine  whether  a  new  product  includes  a  modification  to  the  structure  of  a  previously  licensed  product  that  results  in  a  change  in  safety,  purity,  or
potency to assess whether the licensure of the new product is a first licensure that triggers its own period of exclusivity and, for subsequent applications,
such determinations are made a case-by-case basis with data submitted by the sponsor. As of December 17, 2020, the FDA has approved 29 biosimilar
products for use in the United States. No interchangeable biosimilars have been approved.

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Pediatric Exclusivity

Pediatric exclusivity is another type of regulatory exclusivity in the United States. Pediatric exclusivity, if granted, adds six months to existing regulatory
exclusivity periods or patent protection. This six-month exclusivity may be granted based on the voluntary completion of a pediatric trial in accordance
with  an  FDA-issued  “Written  Request”  for  such  a  trial.  Furthermore,  a  biological  product  seeking  licensure  as  biosimilar  to  or  interchangeable  with  a
reference  product  indicated  for  a  rare  disease  or  condition  and  granted  seven  years  of  orphan  drug  exclusivity  may  not  be  licensed  by  the  FDA  for  the
protected  orphan  indication  until  after  the  expiration  of  the  seven-year  orphan  drug  exclusivity  period  or  the  12-year  reference  product  exclusivity,
whichever is later.

Foreign Regulation

As in the United States, we will be subject to a variety of foreign regulations governing clinical trials and commercial sales and distribution of our future
products and medicinal products can be marketed only if a marketing authorization from the competent regulatory agencies has been obtained.

Certain countries outside of the United States have a process that requires the submission of a clinical trial application, or CTA, much like the IND prior to
the commencement of human clinical studies. In the European Union, for example, a CTA must be submitted for each clinical trial to the national health
authority  and  an  independent  ethics  committee  in  each  country  in  which  the  company  intends  to  conduct  clinical  trials.  Once  the  CTA  is  approved  in
accordance with a country’s requirements, the clinical trial may proceed. In all cases, the clinical trials must be conducted in accordance with GCPs and
other applicable regulatory requirements and ethical principles.

In April 2014, the European Union adopted a new Clinical Trials Regulation (EU) No 536/2014, which is set to replace the current Clinical Trials Directive
2001/20/EC. The new legislation aims at simplifying and streamlining the approval of clinical trials in the European Union. Under the new coordinated
procedure for the approval of clinical trials, the sponsor of a clinical trial to be conducted in more than one EU Member State will only be required to
submit  a  single  application  for  approval  of  a  clinical  trial  to  a  reporting  EU  Member  State.  The  Clinical  Trials  Regulation  also  aims  to  streamline  and
simplify  the  rules  on  safety  reporting  for  clinical  trials.  As  of  January  20,  2021,  the  website  of  the  European  Medicines  Agency  reported  that  the  new
Clinical Trials Regulation will be implemented when the clinical trials portal and database goes live, which is expected to be in December 2021.

To  obtain  regulatory  approval  of  an  investigational  product  under  European  Union  regulatory  systems,  we  must  submit  a  marketing  authorization
application  under  either  a  centralized  or  decentralized  procedure.  The  centralized  procedure  is  compulsory  for  medicinal  products  produced  by
biotechnology. The application used to file the BLA in the United States is similar to that required in the European Union, with the exception of, among
other things, region-specific document requirements.

The  European  Union  also  provides  opportunities  for  market  exclusivity.  For  example,  upon  receiving  marketing  authorization,  innovative  medicinal
products generally receive eight years of data exclusivity and an additional two years of market exclusivity. If grated, data exclusivity prevents regulatory
authorities in the European Union from referencing the innovator’s data to assess a generic or biosimilar application. There is no guarantee that a product
will be considered by the European Union’s regulatory authorities to be an innovative medicinal product, and products may not qualify for data exclusivity.
Products receiving orphan designation in the European Union can receive ten years of market exclusivity, during which time no similar medicinal product
for the same indication may be placed on the market. An orphan product can also obtain an additional two years of market exclusivity in the European
Union for pediatric studies. No extension to any supplementary protection certificate can be granted on the basis of pediatric studies for orphan indications.

If  we  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.

Brexit and the Regulatory Framework in the United Kingdom

The United Kingdom left the European Union on January 31, 2020, which is commonly referred to as Brexit, and in December 2020, the United Kingdom
and  the  European  Union  agreed  on  a  trade  and  cooperation  agreement,  under  which  the  United  Kingdom  and  the  European  Union  will  now  form  two
separate markets governed by two distinct regulatory and legal regimes.

Because the regulatory framework for pharmaceutical products in the United Kingdom covering quality, safety, and efficacy of pharmaceutical products,
clinical  trials,  marketing  authorization,  commercial  sales,  and  distribution  of  pharmaceutical  products  is  derived  from  European  Union  directives  and
regulations,  Brexit  could  materially  impact  the  future  regulatory  regime  that  applies  to  products  and  the  approval  of  product  candidates  in  the  United
Kingdom, as the U.K. legislation now has the potential

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to  diverge  from  EU  legislation.  It  remains  to  be  seen  how  Brexit  will  impact  regulatory  requirements  for  medicinal  products  and  devices  in  the  United
Kingdom in the long-term. Any delay in obtaining, or an inability to obtain, any marketing approvals, as a result of Brexit or otherwise, may force us to
restrict or delay efforts to seek regulatory approval in the United Kingdom for our product candidates, which could significantly and materially harm our
business.

General Data Protection Regulation

The collection, use, disclosure, transfer, or other processing of personal data regarding individuals in the EU, including personal health data, is subject to
the  EU  General  Data  Protection  Regulation,  or  GDPR,  which  became  effective  on  May  25,  2018.  The  GDPR  is  wide-ranging  in  scope  and  imposes
numerous requirements on companies that process personal data, including requirements relating to processing health and other sensitive data, obtaining
consent  of  the  individuals  to  whom  the  personal  data  relates,  providing  information  to  individuals  regarding  data  processing  activities,  implementing
safeguards to protect the security and confidentiality of personal data, providing notification of data breaches, and taking certain measures when engaging
third-party processors. The GDPR also imposes strict rules on the transfer of personal data to countries outside the EU, including the U.S., and permits data
protection authorities to impose large penalties for violations of the GDPR, including potential fines of up to €20 million or 4% of annual global revenues,
whichever is greater. The GDPR also confers a private right of action on data subjects and consumer associations to lodge complaints with supervisory
authorities, seek judicial remedies, and obtain compensation for damages resulting from violations of the GDPR. Compliance with the GDPR will be a
rigorous  and  time-intensive  process  that  may  increase  the  cost  of  doing  business  or  require  companies  to  change  their  business  practices  to  ensure  full
compliance.

Reimbursement

Sales of our products will depend, in part, on the extent to which our products will be covered by third-party payors, such as government health programs,
commercial insurance and managed healthcare organizations. In the United States, no uniform policy of coverage and reimbursement for drug or biological
products exists. Accordingly, decisions regarding the extent of coverage and amount of reimbursement to be provided for any of our products will be made
on a payor-by-payor basis. As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide
scientific and clinical support for the use of our products to each payor separately, with no assurance that coverage and adequate reimbursement will be
obtained.

The United States government, state legislatures and foreign governments have shown significant interest in implementing cost containment programs to
limit the growth of government-paid health care costs, including price-controls, restrictions on reimbursement and requirements for substitution of generic
products for branded prescription drugs. If we obtain approval in the future to market any our product candidates, we may seek approval and coverage for
those  products  under  Medicaid,  Medicare  and  the  Public  Health  Service  pharmaceutical  pricing  program  and  may  seek  approval  to  sell  the  products  to
federal agencies. Adoption of general controls and measures, coupled with the tightening of restrictive policies in jurisdictions with existing controls and
measures, could limit payments for pharmaceutical drugs.

Medicaid  is  a  joint  federal  and  state  program  that  is  administered  by  the  states  for  low  income  and  disabled  beneficiaries.  The  Medicaid  Drug  Rebate
Program requires pharmaceutical manufacturers to pay a rebate for each product reimbursed by the state Medicaid programs. The amount of the rebate for
each product is set by law and may be subject to an additional discount if certain pricing increases more than inflation.

Medicare is a federal program that is administered by the federal government. The program covers individuals age 65 and over as well as those with certain
disabilities.  Medicare  Part  D  provides  coverage  to  enrolled  Medicare  patients  for  self-administered  drugs  (i.e.,  drugs  that  are  not  administered  by  a
physician). Medicare Part D is administered by private prescription drug plans approved by the U.S. government and each drug plan establishes its own
Medicare Part D formulary for prescription drug coverage and pricing, which the drug plan may modify from time to time.

Medicare  Part  B  covers  most  injectable  drugs  given  in  an  in-patient  setting,  and  some  drugs  administered  by  a  licensed  medical  provider  in  hospital
outpatient  departments  and  doctors’  offices.  Medicare  Part  B  is  administered  by  Medicare  Administrative  Contractors,  which  generally  have  the
responsibility of making coverage decision. Subject to certain payment adjustments and limits, Medicare generally pays for Part B covered drugs based on
a percentage of a manufacturer-reported average sales price.

As noted above, the marketability of any products for which we receive regulatory approval for commercial sale may suffer if the government and third-
party  payors  fail  to  provide  adequate  coverage  and  reimbursement.  An  increasing  emphasis  on  cost  containment  measures  in  the  United  States  has
increased  and  we  expect  will  continue  to  increase  the  pressure  on  pharmaceutical  pricing.  Coverage  policies  and  third-party  reimbursement  rates  may
change at any time. Even if favorable coverage and reimbursement status is attained for one or more products for which we receive regulatory approval,
less favorable coverage policies and reimbursement rates may be implemented in the future.

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In addition, in most foreign countries, the proposed pricing for a drug must be approved before it may be lawfully marketed. The requirements governing
drug pricing and reimbursement vary widely from country to country. There can be no assurance that any country that has price controls or reimbursement
limitations  for  pharmaceutical  products  will  allow  favorable  reimbursement  and  pricing  arrangements  for  any  of  our  products.  Historically,  products
launched in the European Union do not follow price structures of the United States and generally prices tend to be significantly lower.

Healthcare Reform

A primary trend in the U.S. healthcare industry and elsewhere is cost containment. There have been a number of federal and state proposals during the last
few  years  regarding  the  pricing  of  pharmaceutical  and  biopharmaceutical  products,  limiting  coverage  and  reimbursement  for  drugs  and  other  medical
products, government control and other changes to the healthcare system in the United States. By way of example, the United States and state governments
continue to propose and pass legislation designed to reduce the cost of healthcare. In March 2010, the United States Congress enacted the Affordable Care
Act, or ACA, which, among other things, includes changes to the coverage and payment for products under government health care programs.

Since  enactment  of  the  ACA,  there  have  been  numerous  legal  challenges  and  Congressional  actions  to  repeal  and  replace  provisions  of  the  law.  For
example, with enactment of the Tax Cuts and Jobs Act of 2017, Congress repealed the “individual mandate.” The repeal of this provision, which requires
most Americans to carry a minimal level of health insurance, became effective in 2019.

In addition, on December 14, 2018, a U.S. District Court judge in the Northern District of Texas ruled that the individual mandate portion of the ACA is an
essential  and  inseverable  feature  of  the  ACA,  and  therefore  because  the  mandate  was  repealed  as  part  of  the  Tax  Cuts  and  Jobs  Act,  the  remaining
provisions of the ACA are invalid as well. On December 18, 2019, the Court of Appeals for the Fifth Circuit court affirmed the lower court’s ruling that the
individual mandate portion of the ACA is unconstitutional, and it remanded the case to the district court for reconsideration of the severability question and
additional analysis of the provisions of the ACA. The U.S. Supreme Court agreed to hear this case. Oral argument in the case took place on November 10,
2020. On February 10, 2021, the Biden Administration withdrew the Department of Justice’s support for this lawsuit. A ruling by the Court is expected
sometime this year. Litigation and legislation over the ACA are likely to continue, with unpredictable and uncertain results.

Further, there have been several recent U.S. congressional inquiries and proposed federal and proposed and enacted state legislation designed to, among
other things, bring more transparency to drug pricing, review the relationship between pricing and manufacturer patient programs, reduce the costs of drugs
under  Medicare  and  reform  government  program  reimbursement  methodologies  for  drug  products.  At  the  state  level,  individual  states  are  increasingly
aggressive in passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient
reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases,
designed to encourage importation from other countries and bulk purchasing.

Human Capital

As of December 31, 2020, we had 128 full-time employees. Of these full-time employees, 39 have Ph.D. or M.D. degrees and 98 are engaged in research
and  development  activities.  None  of  our  employees  are  represented  by  labor  unions  or  covered  by  collective  bargaining  agreements.  We  consider  our
relationship with our employees to be good.

Corporate Information

Our principal offices are located at 780 Memorial Drive, Cambridge, MA 02139, and our telephone number is (857) 259-3840.

We are an “emerging growth company” as defined in the Jumpstart Our Business Startups Act of 2012. We will remain an emerging growth company until
the earlier of: (i) the last day of the fiscal year (a) following the fifth anniversary of the completion of the our initial public offering in February 2017, (b) in
which we have total annual gross revenue of at least $1.07 billion, or (c) in which we are deemed to be a large accelerated filer, which means the market
value of our common stock that is held by non-affiliates exceeds $700.0 million as of the prior June 30th, and (ii) the date on which we have issued more
than $1.0 billion in non-convertible debt during the prior three-year period.

We  are  also  a  “smaller  reporting  company,”  meaning  that  the  market  value  of  our  stock  held  by  non-affiliates  is  less  than  $700  million  and  our  annual
revenue was less than $100 million during our most recently completed fiscal year. We may continue to be a smaller reporting company if either (i) the
market value of our stock held by non-affiliates is less than $250 million or (ii) our annual revenue was less than $100 million during the most recently
completed fiscal year and the market value of our stock held by non-affiliates is less than $700 million. If we are a smaller reporting company at the time
we cease to be an emerging growth company, we may continue to rely on exemptions from certain disclosure requirements that are available to smaller

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reporting  companies.  Specifically,  as  a  smaller  reporting  company  we  may  choose  to  present  only  the  two  most  recent  fiscal  years  of  audited  financial
statements  and,  similar  to  emerging  growth  companies,  smaller  reporting  companies  have  reduced  disclosure  obligations  regarding  executive
compensation.

Our website address is www.jouncetx.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 on Form 10-K. Through our website, we make available, free of
charge,  our  annual  reports  on  Form  10-K,  quarterly  reports  on  Form  10-Q,  current  reports  on  Form  8-K,  any  amendments  to  those  reports,  proxy  and
registration  statements,  and  all  of  our  insider  Section  16  reports,  as  soon  as  reasonably  practicable  after  such  material  is  electronically  filed  with,  or
furnished to, the Securities and Exchange Commission, or the SEC. These SEC reports can be accessed through the “Investors & Media” section of our
website. The information found on our website (or that may be accessed through links on our website) is not part of this or any other report we file with, or
furnish to, the SEC. You should not rely on any such information in making your decision whether to purchase our common stock.

In addition, the SEC maintains an internet site that contains reports, proxy and information statements, and other information regarding issuers that file
electronically  with  the  SEC,  including  us,  and  any  document  we  file  may  be  viewed  at  the  SEC’s  internet  address  at  http://www.sec.gov  (this  website
address is not intended to function as a hyperlink, and the information contained in the SEC’s website is not intended to be a part of this filing).

Our  code  of  conduct,  corporate  governance  guidelines  and  the  charters  of  our  Audit  Committee,  Compensation  Committee,  Nominating  and  Corporate
Governance Committee and Science and Technology Committee are available through our website at www.jouncetx.com.

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Item 1A. Risk Factors

Our business is subject to numerous risks. The following important factors, among others, could cause our actual results to differ materially from those
expressed  in  forward-looking  statements  made  by  us  or  on  our  behalf  in  this  Annual  Report  on  Form  10-K  and  other  filings  with  the  Securities  and
Exchange Commission, or the SEC, press releases, communications with investors, and oral statements. Actual future results may differ materially from
those  anticipated  in  our  forward-looking  statements.  We  undertake  no  obligation  to  update  any  forward-looking  statements,  whether  as  a  result  of  new
information, future events, or otherwise.

Risks Related to Product Development and Regulatory Process

The  ongoing  COVID-19  pandemic  has  adversely  affected,  and  may  continue  to  adversely  affect,  our  business,  including  our  clinical  trials  and
preclinical studies.

The  COVID-19  pandemic  has  caused  many  governments  to  implement  measures  to  slow  the  spread  of  the  outbreak  through  quarantines,  strict  travel
restrictions, heightened border scrutiny and other measures. The COVID-19 pandemic and government measures taken in response have had a significant
impact,  both  direct  and  indirect,  on  business  and  commerce,  as  supply  chains  have  been  disrupted;  facilities  and  production  have  been  suspended;  and
demand for certain goods and services, such as medical services and supplies, have increased dramatically, while demand for other goods and services,
such as travel, has fallen. The future progression of the COVID-19 pandemic and its effects on our business and operations are uncertain.

In response to the spread of COVID-19, we have restricted access to our headquarters by limiting the number of staff in our research and development
laboratory  and  office  space,  and  directing  and  then  recommending  our  employees  who  are  able  to  work  remotely  to  continue  their  work  outside  of  our
office. We believe the COVID-19 pandemic has had, and may continue to have, an impact on our clinical trials. For example, as a result of the COVID-19
pandemic,  the  timing  of  our  release  of  clinical  data  from  our  SELECT  clinical  trial  has  been  delayed  due  in  part  to  difficulty  sourcing  components  for
sample-collection kits. As a result of the COVID-19 pandemic, we may experience disruptions that could severely impact our business, clinical trials and
preclinical studies, including:

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

delays or difficulties in enrolling patients in our clinical trials;

delays or difficulties in developing diagnostics or conducting biomarker analysis by third-party vendors who support our clinical trials;

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

interruption  of  key  clinical  trial  activities,  such  as  clinical  trial  site  data  monitoring,  due  to  limitations  on  travel  imposed  or  recommended  by
federal  or  state  governments,  employers  and  others  or  interruption  of  clinical  trial  patient  visits  and  study  procedures  that  are  deemed  non-
essential, which may impact the integrity of subject data and clinical study endpoints;

additional delays or difficulties in completing the analysis of or reporting results from our clinical trials;

interruption or delays in the operations of the Food and Drug Administration, or the FDA, or comparable foreign regulatory authorities, which
may impact clinical trial timelines or approval timelines;

interruption  of,  or  delays  in  receiving,  supplies  of  our  product  candidates  and/or  supplies  used  in  the  conduct  of  our  clinical  trials  from  our
contract  manufacturing  organizations  due  to  raw  materials  shortages,  staffing  shortages,  production  slowdowns  or  stoppages,  disruptions  in
delivery systems and government restrictions or limitations, such as those imposed by the Defense Production Act;

interruption of or delays in the performance of contractual duties by third parties on whom we rely to conduct our clinical trials;

limitations on employee resources that would otherwise be focused on the conduct of our preclinical studies and clinical trials, including because
of sickness of employees or their families, the desire of employees to avoid contact with large groups of people or changes to governmental orders
related to essential services;

increased reliance on personnel working from home may negatively impact productivity; and

difficulties raising capital on favorable terms when needed.

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The COVID-19 pandemic continues to evolve. The extent to which the COVID-19 pandemic may further impact our business, clinical trials and preclinical
studies and supply chain will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the duration of
the  pandemic,  travel  restrictions  and  social  distancing  in  the  United  States  and  other  countries,  business  closures  or  business  disruptions  and  the
effectiveness of actions taken in the United States and other countries to contain and treat the disease.

We are early in our development efforts. If we are unable to advance our product candidates through clinical development, advance future product
candidates to clinical development or obtain marketing approval and ultimately commercialize any product candidates or experience significant delays
in doing so, our business will be materially harmed.

We  are  early  in  our  development  efforts:  JTX-8064,  vopratelimab  and  JTX-4014  are  our  clinical-stage  product  candidates,  and  JTX-1811  and  future
product  candidates  are  in  preclinical  or  earlier  stages  of  development.  We  have  invested  substantially  all  of  our  efforts  and  financial  resources  in  the
identification  of  targets  and  early  stage,  preclinical  and  clinical  development  of  monoclonal  antibodies,  including  the  development  of  JTX-8064,
vopratelimab, JTX-4014 and JTX-1811.

Our other efforts have been invested in early stage, preclinical and earlier development programs. Our ability to generate product revenues, which we do
not  expect  will  occur  for  many  years,  if  ever,  will  depend  heavily  on  the  successful  development  and  eventual  commercialization  of  our  current  and/or
future product candidates, which may never occur. We currently generate no revenues from sales of any products, and we may never be able to develop or
commercialize a marketable product. In August 2020, we entered into an agreement to grant an exclusive license for the development, manufacture and
commercialization  of  JTX-1811  to  Gilead  Sciences,  Inc.,  or  Gilead,  and  we  may  never  receive  any  payments  from  Gilead  for  the  achievement  of
development, regulatory or commercial milestones, or royalties from potential future sales of JTX-1811. Our current and future product candidates will
require additional preclinical and clinical development, management of clinical, preclinical and manufacturing activities, marketing approval in the United
States and other markets, demonstrating effectiveness to pricing and reimbursement authorities, obtaining sufficient manufacturing supply for both clinical
development and commercial production, building of a commercial organization, and substantial investment and significant marketing efforts before we
generate any revenues from product sales. In addition, our product development programs contemplate the development of companion diagnostics and/or
complementary diagnostics, which are assays or tests to identify an appropriate patient population. Complementary diagnostics and companion diagnostics
are subject to regulation as medical devices and, if there are no adequate companion diagnostics and/or complementary diagnostics currently on the market
for our product candidates, we may elect to advance a diagnostic and that diagnostic would have to be approved or cleared for marketing by the FDA or
comparable foreign regulatory agencies before we could commercialize it. The success of our current and future product candidates will depend on several
factors, including the following:

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successful completion of preclinical studies and advancement to clinical development of our product candidates;

acceptance of investigational new drug applications for our planned clinical trials or future clinical trials;

successful enrollment and completion of clinical trials;

demonstration  of  a  benefit/risk  profile  for  our  current  and  future  product  candidates  that  is  sufficient  to  support  a  successful  biologics  license
application, or BLA;

successful  development  and  marketing  approval  and  clearance  of  companion  diagnostics  and/or  complementary  diagnostics  for  use  with  our
current and future product candidates, if applicable;

receipt and maintenance of marketing approvals from applicable regulatory authorities;

approval  by  national  pricing  and  reimbursement  agencies  (such  as  NICE,  National  Institute  for  Health  Care  and  Excellence  in  the  United
Kingdom);

establishing  agreements  with  third-party  manufacturers  for  clinical  supply  for  our  clinical  trials  and  commercial  manufacturing,  if  our  product
candidates are approved;

obtaining and maintaining patent and trade secret protection or regulatory exclusivity for our product candidates;

launching commercial sales of our current and future product candidates, if and when approved;

acceptance of our product candidates, if and when approved, by patients, the medical community and third-party payors;

effectively competing with other therapies;

obtaining and maintaining healthcare coverage and adequate reimbursement;

enforcing and defending intellectual property rights and claims;

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successful completion of clinical confirmatory trials to verify clinical benefit, if applicable; and

maintaining a continued acceptable safety profile of the product candidates following approval.

If  we  do  not  achieve  one  or  more  of  these  factors  in  a  timely  manner  or  at  all,  we  could  experience  significant  delays  or  an  inability  to  successfully
commercialize  our  current  and  future  product  candidates,  which  would  materially  harm  our  business.  If  we  do  not  receive  marketing  approvals  for  our
current and future product candidates, we may not be able to continue our operations.

Clinical product development involves a lengthy and expensive process, with an uncertain outcome. We will incur additional costs in connection with,
and  may  experience  delays,  in  completing,  or  ultimately  be  unable  to  complete,  the  development  and  commercialization  of  our  current  and  future
product candidates, and any companion diagnostics and/or complementary diagnostics.

The risk of failure for our product candidates at any stage of clinical or preclinical development is high. It is impossible to predict when or if our current
and  future  product  candidates  will  prove  effective  and  safe  in  humans  and  will  receive  marketing  approval.  Before  obtaining  marketing  approval  from
regulatory authorities for the sale of our product candidates, we must complete preclinical studies and then conduct extensive clinical trials to demonstrate
the safety and efficacy of our current and future product candidates in humans. Clinical testing is expensive, difficult to design and implement, can take
many years to complete or may be delayed and is uncertain as to outcome. A failure of one or more clinical trials can occur at any stage of testing. The
outcome of preclinical development and testing and early clinical trials may not be predictive of the success of later clinical trials, and interim results of a
clinical trial do not necessarily predict final results. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and
many  companies  that  have  believed  their  product  candidates  performed  satisfactorily  in  preclinical  studies  and  clinical  trials  have  nonetheless  failed  to
obtain marketing approval of their product candidates. Our preclinical studies and clinical trials may not be successful.

The FDA or comparable foreign regulatory authorities could change their position on the acceptability of our trial designs or the clinical endpoints selected,
which may require us to complete more preclinical studies or provide additional data before continuing clinical trials. In the event we are required to satisfy
additional FDA requests, the completion of our clinical trials for JTX-8064, vopratelimab and JTX-4014 may be delayed. Successful completion of our
clinical trials is a prerequisite to submitting a BLA to the FDA and a Marketing Authorization Application, or MAA, in the European Union for our current
and future product candidates and, consequently, the ultimate approval and commercial marketing of our current and future product candidates. We do not
know whether any of our clinical trials will be completed on schedule, if at all.

We may experience delays in completing our preclinical studies and initiating or completing clinical trials, and we may experience numerous unforeseen
events during, or as a result of, any potential future clinical trials that could delay or prevent our ability to receive marketing approval of our current and
future product candidates, including:

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interruption of key clinical trial activities as a result of the COVID-19 pandemic, such as developing diagnostics, conducting biomarker analysis,
clinical trial site data monitoring, due to limitations on travel imposed or recommended by federal or state governments, employers and others or
interruption of clinical trial subject visits and study procedures that are deemed non-essential, which may impact the integrity of subject data and
clinical study endpoints;

patients  may  be  affected  by  COVID-19  and  the  virus  could  impact  pharmacodynamic  biomarkers  studied  in  our  clinical  trials  and  the
interpretation of related data;

regulators,  institutional  review  boards,  or  IRBs,  or  ethics  committees  may  not  authorize  us  or  our  investigators  to  commence  a  clinical  trial  or
conduct a clinical trial at a prospective trial site;

we  may  experience  delays  in  reaching,  or  fail  to  reach,  agreement  on  acceptable  terms  with  prospective  trial  sites  and  prospective  contract
research organizations, or CROs;

clinical trials may produce negative or inconclusive results, and we may decide, or regulators may require us, to conduct additional preclinical
studies or clinical trials or abandon product development programs;

the number of patients required for clinical trials may be larger than we anticipate;

it may be difficult to enroll a sufficient number of patients with a predictive biomarker or enrollment in these clinical trials may be slower than we
anticipate, or participants may drop out of these clinical trials or fail to return for post-treatment follow-up at a higher rate than we anticipate;

our third-party contractors, trial sites or investigators may fail to comply with regulatory requirements or meet their contractual obligations to us in
a timely manner, or at all, or may deviate from the clinical trial protocol or drop out of the trial, which may require that we add new clinical trial
sites or investigators;

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we may elect to, or regulators or IRBs or ethics committees may require that we or our investigators, suspend or terminate clinical research for
various reasons, including noncompliance with regulatory requirements or a finding that the participants are being exposed to unreasonable and
significant health risks;

the cost of clinical trials may be greater than we anticipate;

the  supply  or  quality  of  materials  or  other  materials  necessary  to  conduct  clinical  trials  may  be  insufficient  or  inadequate  due  to  supply  chain
interruptions caused by COVID-19 or other factors;

the size of the patient population required to validate our biomarker-driven strategy may be larger than we anticipate;

competitors  may  obtain  regulatory  approval  ahead  of  us  for  products  or  antibodies  similar  to  ours,  preventing  us  from  obtaining  regulatory
approval despite positive clinical data;

our  product  candidates  may  have  undesirable  side  effects  or  other  unexpected  characteristics,  causing  us  to  suspend  or  terminate  the  trials,  or
reports  may  arise  from  preclinical  or  clinical  testing  of  other  similar  cancer  therapies  that  raise  safety  or  efficacy  concerns  about  our  product
candidates; and

the FDA or other regulatory authorities may require us to submit additional data or impose other requirements before permitting us to initiate or
continue a clinical trial.

We could encounter delays if a clinical trial is suspended or terminated by us, by the IRBs of the institutions in which such trials are being conducted or
ethics committees, or by the FDA or other regulatory authorities, or recommended for suspension or termination by the data safety monitoring board for
such trial. Such authorities or we may impose such a suspension or termination due to a number of factors, including failure to conduct the clinical trial in
accordance  with  regulatory  requirements  or  our  clinical  protocols,  inspection  of  the  clinical  trial  operations  or  trial  site  by  the  FDA  or  other  regulatory
authorities resulting in the imposition of a clinical hold, unforeseen safety issues or adverse side effects, including those issues or effects seen in other drugs
or  drug  candidates  in  the  class  to  which  our  drug  candidates  belong,  failure  to  demonstrate  a  benefit  from  using  a  product,  changes  in  governmental
regulations  or  lack  of  adequate  funding  to  continue  the  clinical  trial.  Many  of  the  factors  that  result  in  a  delay  in  the  commencement  or  completion  of
clinical trials may also ultimately lead to the denial of marketing approval of our product candidates. Further, regulatory authorities may disagree with our
clinical trial design and our interpretation of data from clinical trials or may change the requirements for approval even after such authorities have reviewed
and commented on the design for our clinical trials.

If we are required to conduct additional clinical trials or other testing, if the results of these trials or tests are not positive or are only modestly positive or if
there are safety concerns, or if we are unable to successfully complete clinical trials or other testing of our current and future product candidates, we may:

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be delayed in obtaining marketing approval for our product candidates;

not obtain marketing approval at all;

obtain approval for indications or patient populations that are not as broad as intended or desired;

be subject to post-marketing testing requirements; or

have the product removed from the market after obtaining marketing approval.

Our product development costs will also increase if we experience delays in testing or marketing approvals. We do not know whether any of our clinical
trials  will  need  to  be  restructured,  will  be  completed  on  schedule,  or  will  begin  as  planned,  if  at  all.  Any  delays  in  our  preclinical  or  future  clinical
development programs may harm our business, financial condition and prospects significantly.

Our current and future product candidates may cause undesirable side effects or have other properties when used alone or in combination with other
approved pharmaceutical products or investigational new drugs that could halt their clinical development, prevent their marketing approval, limit their
commercial potential or result in significant negative consequences.

Although  our  current  and  future  product  candidates  will  undergo  safety  testing  to  the  extent  possible  and,  where  applicable,  under  such  conditions
discussed with regulatory authorities, not all adverse effects of drugs can be predicted or anticipated. In order to obtain marketing approval of a product
candidate, we must demonstrate safety in various non-clinical and clinical tests. At the time of initiating human clinical trials, we may not have conducted
or may not conduct the types of non-clinical testing ultimately required by regulatory authorities, or future non-clinical tests may indicate that our product
candidates are not safe for use. Non-clinical testing and clinical testing are both expensive and time-consuming and have uncertain outcomes.

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Immunotherapy, and its method of action of enabling the body’s immune system, is powerful and could lead to serious side effects that we only discover in
clinical trials. Undesirable or clinically unmanageable side effects could occur and cause us or regulatory authorities to interrupt, delay or halt clinical trials
and could result in a more restrictive label or the delay or denial of marketing approval by the FDA or comparable foreign regulatory authorities. Results of
our  trials  could  reveal  a  high  and  unacceptable  severity  and  prevalence  of  side  effects  or  unexpected  characteristics.  Unforeseen  side  effects  from  our
current  and  future  product  candidates  could  arise  either  during  clinical  development  or,  if  such  side  effects  are  more  rare,  after  our  current  and  future
product  candidates  have  been  approved  by  regulatory  authorities  and  the  approved  product  has  been  marketed,  resulting  in  the  exposure  of  additional
patients. Although we have observed that vopratelimab and JTX-4014 each have an acceptable safety profile in studies to date, we cannot predict if future
clinical trials of our product candidates, including JTX-8064, either alone or in combination with other therapies, will demonstrate safety in humans. If any
of our current or future product candidates fail to demonstrate safety and efficacy in clinical trials or do not gain marketing approval, we will not be able to
generate revenue and our business will be harmed.

We cannot predict whether future safety and toxicology studies may cause undesirable effects. Success in initial tests does not ensure that later testing will
be  successful.  Our  product  candidates  could  cause  undesirable  side  effects  similar  to  those  toxicities  observed  in  other  immunotherapies.  It  remains
possible that new or more severe toxicities could be seen if any product candidate is used in combination with other agents. Such toxicities, if observed,
could result in development delays, a determination by the FDA or other regulatory authorities that additional safety testing is required, delay or denial of
approval, or limit the labeling and thus overall market scope for such product candidate.

If unacceptable toxicities arise in the development of our current and future product candidates, we or an existing or future collaborator or licensee could
suspend or terminate clinical trials, or the FDA or comparable foreign regulatory authorities could order us, a collaborator or licensee to cease clinical trials
or deny approval of our current and future product candidates for any or all targeted indications. Treatment-related side effects could also affect patient
recruitment or the ability of enrolled subjects to complete the trial or result in potential product liability claims. In addition, these side effects may not be
appropriately recognized or managed by the treating medical staff, particularly outside of our collaborators or licensees, as toxicities resulting from cancer
immunotherapies are not normally encountered in the general patient population or by medical personnel. We expect to have to train medical personnel
using any of our product candidates to understand the side effect profile of such product candidates for both our ongoing and planned clinical trials and
upon commercialization of such product candidates. The inability to recognize and manage the potential side effects of our product candidates could result
in patient deaths. Any of these occurrences may prevent us from achieving or maintaining market acceptance of the affected product candidate and may
harm our business, financial condition and prospects significantly.

If we encounter difficulties enrolling or retaining patients in our clinical trials, our clinical development activities could be delayed or otherwise be
adversely affected.

The  timely  completion  of  clinical  trials  in  accordance  with  their  protocols  depends,  among  other  things,  on  our  ability  to  enroll  and  retain  a  sufficient
number of patients who remain in the study until its conclusion. We may experience difficulties in patient enrollment and retention in our clinical trials for
a variety of reasons. The enrollment and retention of patients depend on many factors, including:

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the patient eligibility criteria defined in the protocol;

the development of diagnostics and/or biomarker analysis by third parties;

our ability to identify and enroll sufficient number of patients with a predictive biomarker;

the size of the population that we must screen to identify a sufficient number of patients with a predictive biomarker;

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

the proximity of patients to study sites;

the design of the trial;

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

clinicians’ and patients’ perceptions of the potential advantages of the product candidate being studied in relation to other available therapies;

our ability to obtain and maintain patient consents for participation in our clinical trials and, where appropriate, biopsies to understand our product
candidates better and for future patient enrichment efforts;

the risk that patients enrolled in clinical trials will drop out of the trials before completion or, because they are late-stage cancer patients, will not
survive the full terms of the clinical trials;

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the ability of our clinical trial sites to continue key activities, such as clinical trial site data monitoring and patient visits, due to limitations on
travel imposed or recommended by federal or state governments, employers and others as a result of the COVID-19 pandemic; and

the risk that patients may be affected by COVID-19 or measures taken in response to the COVID-19 pandemic and are unable to travel to our
clinical trial sites.

In addition, our clinical trials will compete with other clinical trials for product candidates that are in the same therapeutic areas as our current and future
product candidates. This competition will reduce the number and types of patients available to us, because some patients who might have opted to enroll in
our trials may instead opt to enroll in a trial conducted by one of our competitors. Since the number of qualified clinical investigators is limited, we expect
to conduct some of our clinical trials at the same clinical trial sites that some of our competitors use, which will reduce the number of patients who are
available for our clinical trials at such sites. Moreover, because our current and future product candidates represent a departure from more commonly used
methods for cancer treatment, potential patients and their doctors may be inclined to use conventional therapies, such as chemotherapy, rather than enroll
patients in our ongoing or any future clinical trial.

Delays  in  patient  enrollment  may  result  in  increased  costs  or  may  affect  the  timing  or  outcome  of  the  planned  clinical  trials,  which  could  prevent
completion of these trials and adversely affect our ability to advance the development of our current and future product candidates.

We may not be able to conduct clinical trials in some jurisdictions outside of the United States.

We are currently conducting SELECT outside of the United States, and we may conduct future trials in markets outside the United States. Our ability to
successfully  initiate,  enroll  and  complete  a  clinical  trial  in  any  country  outside  of  the  United  States  is  subject  to  numerous  additional  risks  unique  to
conducting business in jurisdictions outside the United States, including:  

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difficulty in establishing or managing relationships with qualified CROs, physicians and clinical trial sites;

different local standards for the conduct of clinical trials;

difficulty in complying with various and complex import laws and regulations when shipping drug to certain countries;

the  potential  burden  of  complying  with  a  variety  of  laws,  medical  standards  and  regulatory  requirements,  including  the  regulation  of
pharmaceutical and biotechnology products and treatments;

lack of consistency in standard of care from country to country;

diminished protection of intellectual property in some countries;

foreign exchange fluctuations;

cultural differences in medical practice and clinical research; and

changes in country or regional regulatory requirements.

Furthermore, the COVID-19 pandemic may also have an impact on our ability to successfully conduct trials outside of the United States. For example, we
are conducting SELECT in countries where clinical trial site staff have been diverted to care for COVID-19 patients and where regulatory authorities are
short staffed due to the COVID-19 pandemic. If we have difficulty conducting our clinical trials in jurisdictions outside the United States as planned, we
may need to delay, limit or terminate ongoing or planned clinical trials, any of which could have a material adverse effect on our business.

We are currently conducting SELECT outside the United States and may conduct future clinical trials for our product candidates at sites outside the
United  States,  and  the  FDA  may  not  accept  data  from  trials  conducted  in  such  locations  or  the  complexity  of  regulatory  burdens  may  otherwise
adversely impact us.

Although  the  FDA  may  accept  data  from  clinical  trials  conducted  outside  the  United  States,  acceptance  of  these  data  is  subject  to  certain  conditions
imposed by the FDA. For example, the clinical trial must be well designed and conducted and performed by qualified investigators in accordance with
good clinical practices, or GCPs, and the FDA must be able to validate the data from the trial through an onsite inspection, if necessary. Generally, the
patient population for any clinical trials conducted outside the United States must be representative of the population for which we intend to seek approval
in the United States. In addition, while these clinical trials are subject to the applicable local laws, FDA acceptance of the data will be dependent upon its
determination that the trials also complied with all applicable U.S. laws and regulations. Nonetheless, there can be no assurance that the FDA will accept
data from trials conducted outside the United States. If the FDA does not accept the data from any trial that we conduct outside the United States, it would
likely result in the need for additional clinical trials, which

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would  be  costly  and  time-consuming  and  delay  or  permanently  halt  our  development  of  any  applicable  product  candidates.  Furthermore,  certain
jurisdictions require data from trials conducted in their country in order to obtain approval in that country.

We rely on our Translational Science Platform to identify and develop product candidates. Our competitive position could be materially harmed if our
competitors develop a platform similar to our Translational Science Platform and develop rival product candidates.

We rely on unpatented know-how, inventions and other proprietary information, to maintain our competitive position. We consider know-how to be our
primary intellectual property with respect to our Translational Science Platform. Know-how can be difficult to protect. In particular, we anticipate that with
respect to this platform, this know-how may over time be disseminated within the industry through independent development, the publication of journal
articles describing the methodology, and the movement of skilled personnel.

We cannot rule out that our competitors may have or obtain the knowledge necessary to analyze and characterize tumors for the purpose of identifying and
developing products that could compete with the product candidates we develop. Our competitors may also have significantly greater financial, product
development,  technical,  and  human  resources  and  access  to  other  human  tumors  than  we  do  and  may  have  significantly  greater  experience  in  using
translational science methodology to identify and develop product candidates.

We may not be able to prohibit our competitors from using translational science methods to develop product candidates, including such methods that are
the same as or similar to our own. If our competitors use translational science methods to identify and develop products that compete with our current and
future  product  candidates,  our  ability  to  develop  and  market  a  promising  product  or  product  candidate  may  diminish  substantially,  which  could  have  a
material adverse effect on our business prospects, financial condition, and results of operations.

Even if we complete the necessary preclinical studies and clinical trials, the marketing approval process is expensive, time consuming and uncertain
and may prevent us or any of our existing or future collaborators or licensees from obtaining approvals for the commercialization of our current and
future product candidates.

Our product candidates and the activities associated with their development and commercialization, including research, testing, manufacturing, labeling,
approval and license maintenance, selling, import and export, marketing and distribution are subject to extensive regulation by the FDA and comparable
foreign regulatory authorities. Neither we nor any existing or future collaborator or licensee is permitted to market any future product in the United States
until we receive approval of a BLA from the FDA. We have never submitted an application for, or received, marketing approval. Obtaining approval of a
BLA can be a lengthy, expensive and uncertain process. Even if we believe the preclinical or clinical data for our current and future product candidates are
promising, such data may not be sufficient to support approval by the FDA and comparable foreign regulatory authorities.

Marketing approval of a BLA is not guaranteed, and the approval process is expensive and may take several years. The FDA also has substantial discretion
in the approval process. Despite the time and expense exerted, failure can occur at any stage, and we could encounter problems that cause us to abandon or
repeat clinical trials or perform additional preclinical studies and clinical trials. The number of preclinical studies and clinical trials that will be required for
FDA approval varies depending on the product candidate, the disease or condition that the product candidate is designed to address and the regulations
applicable to any particular product candidate. In addition, varying interpretations of the data obtained from preclinical and clinical testing could delay,
limit  or  deny  approval  of  a  product  candidate,  or  we  may  experience  delays  or  rejections  based  upon  government  regulation  or  changes  in  regulatory
agency policy during the period of product development. Regulatory agencies also may impose significant limitations in the form of narrow indications,
warnings,  precautions  or  contraindications  with  respect  to  conditions  of  use  or  may  grant  approval  subject  to  the  performance  of  costly  post-marketing
clinical  trials  or  may  not  approve  the  price  we  intend  to  charge  for  our  product  candidates.  Any  of  the  foregoing  scenarios  could  materially  harm  the
commercial prospects for our current and future product candidates.

If our current and future product candidates fail to demonstrate safety and efficacy in clinical trials or do not gain marketing approval, our business will be
harmed.

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We may seek a Breakthrough Therapy Designation or Fast Track Designation by the FDA for our current and future product candidates, and we may
be unsuccessful. If we are successful, the designation may not actually lead to a faster development or regulatory review or approval process, and it
does not increase the likelihood that our current and future product candidates will receive marketing approval.

We  may  seek  a  Breakthrough  Therapy  Designation  or  Fast  Track  Designation  for  our  current  and  future  product  candidates.  A  breakthrough  therapy  is
defined as a drug that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and
preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over currently approved therapies on one or more clinically
significant endpoints, such as substantial treatment effects observed early in clinical development. Fast Track Designation may be available if a product is
intended for the treatment of a serious or life-threatening condition, and preclinical or clinical data demonstrate the potential to address an unmet medical
need for this condition. Drugs that receive Breakthrough Therapy Designation or Fast Track Designation by the FDA are eligible for accelerated approval
and priority review.

The FDA has broad discretion whether or not to grant Breakthrough Therapy Designation or Fast Track Designation. Even if we receive Breakthrough
Therapy  Designation  or  Fast  Track  Designation  for  a  product  candidate,  such  designation  may  not  result  in  a  faster  development  process,  review  or
approval compared to conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even if one of our current or future
product candidates receives Breakthrough Therapy Designation or Fast Track Designation, the FDA may later decide that the drugs no longer meet the
conditions for qualification and rescind the designation.

We may seek Orphan Drug Designation for our current and future product candidates, and we may be unsuccessful or may be unable to maintain the
benefits associated with Orphan Drug Designation, including the potential for market exclusivity.

As part of our business strategy, we may seek Orphan Drug Designation for our current and future product candidates, and we may be unsuccessful. In the
United  States,  Orphan  Drug  Designation  entitles  a  party  to  financial  incentives  such  as  opportunities  for  grant  funding  towards  clinical  trial  costs,  tax
advantages and user-fee waivers.

In Europe, Orphan Drug Designation entitles a party to a number of incentives, such as protocol assistance and scientific advice specifically for designated
orphan medicines, and potential fee reductions depending on the status of the sponsor.

Generally,  if  a  drug  with  an  Orphan  Drug  Designation  subsequently  receives  the  first  marketing  approval  for  the  indication  for  which  it  has  such
designation, the drug is entitled to a period of marketing exclusivity, which precludes the European Medicines Agency or the FDA from approving another
marketing application for the same drug and indication for a set time period, except in limited circumstances.

Even if we obtain orphan drug exclusivity for a drug, that exclusivity may not effectively protect the drug from competition because different drugs can be
approved for the same condition, or the drug may be used off-label. Even after an orphan drug is approved, the FDA can subsequently approve another
drug for the same condition if the FDA concludes that the other drug is clinically superior. In addition, a designated orphan drug may not receive orphan
drug exclusivity if it is approved for a use that is broader than the indication for which it received orphan designation. Moreover, orphan drug exclusive
marketing  rights  in  the  United  States  may  be  lost  if  the  FDA  later  determines  that  the  request  for  designation  was  materially  defective  or  if  the
manufacturer is unable to assure sufficient quantity of the drug to meet the needs of patients with the rare disease or condition. Orphan Drug Designation
neither shortens the development time or regulatory review time of a drug nor gives the drug any advantage in the regulatory review or approval process.
While  we  may  seek  Orphan  Drug  Designation  for  applicable  indications  for  our  current  and  future  product  candidates,  we  may  never  receive  such
designations. Even if we do receive such designations, there is no guarantee that we will enjoy the benefits of those designations.

We may choose not to develop a potential product candidate, or we may suspend or terminate one or more discovery or preclinical programs or our
product candidates.

At any time and for any reason, we may determine that one or more of our discovery programs, preclinical programs or product candidates does not have
sufficient potential to warrant the allocation of resources toward such program or product candidate. Furthermore, because we have limited financial and
personnel resources, we have placed significant focus on the development of our product candidates JTX-8064, vopratelimab and JTX-4014. Accordingly,
we may choose not to develop a product candidate or elect to suspend or terminate one or more of our discovery or preclinical programs. If we suspend or
terminate  a  program  or  product  candidate  in  which  we  have  invested  significant  resources,  we  will  have  expended  resources  on  a  program  or  product
candidate  that  will  not  provide  a  full  return  on  our  investment.  As  a  result,  we  may  have  missed  an  opportunity  to  have  allocated  those  resources  to
potentially more productive uses, including existing or future programs or product candidates. If we do not accurately evaluate the commercial potential or
target market for a particular future product candidate, we may relinquish valuable rights to future product candidates through collaboration, licensing or
other royalty arrangements.

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Obtaining and maintaining marketing approval of our current or future product candidates in one jurisdiction does not mean that we will be successful
in obtaining marketing approval of that product candidate in other jurisdictions.

Obtaining and maintaining marketing approval of our current and future product candidates in one jurisdiction does not guarantee that we will be able to
obtain  or  maintain  marketing  approval  in  any  other  jurisdiction.  For  example,  even  if  the  FDA  grants  marketing  approval  of  a  product  candidate,
comparable regulatory authorities in foreign jurisdictions must also approve the manufacturing, marketing and promotion of the product candidate in those
countries. Approval procedures vary among jurisdictions and can involve requirements and administrative review periods different from, and greater than,
those in the United States, including additional preclinical studies or clinical trials.

Obtaining foreign marketing approvals and compliance with foreign regulatory requirements could result in significant delays, difficulties and costs for us
and  could  delay  or  prevent  the  introduction  of  our  products  in  certain  countries.  If  we  fail  to  comply  with  the  regulatory  requirements  in  international
markets and/or receive applicable marketing approvals, our target market will be reduced and our ability to realize the full market potential of our current
and future product candidates will be harmed. Even if we obtain approval for our product candidates and ultimately commercialize them in foreign markets,
we would be subject to separate risks and uncertainties, including the burden of complying with complex and changing foreign regulatory, tax, accounting
and legal requirements and the reduced protection of intellectual property rights in some foreign countries.

The  United  Kingdom  left  the  European  Union  on  January  31,  2020,  commonly  referred  to  as  Brexit.  In  December  2020,  the  United  Kingdom  and  the
European  Union  agreed  on  a  trade  and  cooperation  agreement  under  which  the  United  Kingdom  and  the  European  Union  will  now  form  two  separate
markets governed by two distinct regulatory and legal regimes. Depending on the application and terms of the trade and cooperation agreement, we could
face new regulatory costs and challenges. Any delay in obtaining, or an inability to obtain, any marketing approvals as a result of Brexit or otherwise, may
force us to restrict or delay efforts to seek regulatory approval in the United Kingdom for our product candidates, which could significantly and materially
harm our business.

Our failure to successfully identify, discover, acquire, develop or commercialize additional products or product candidates could impair our ability to
grow.

Although a substantial amount of our efforts will focus on the clinical testing and potential approval of our most advanced product candidates, JTX-8064,
vopratelimab  and  JTX-4014,  an  element  of  our  long-term  growth  strategy  is  to  in-license  products  or  product  candidates  for  development  and
commercialization. We may never be able to identify, discover, acquire, develop or commercialize any products or product candidates, which would have a
material adverse effect on our business.

Because our internal research capabilities are limited, we may be dependent upon pharmaceutical and biotechnology companies, academic scientists, and
other researchers to sell or license products or technology to us. The success of this strategy depends partly upon our ability to identify, select, and acquire
promising pharmaceutical product candidates and products. The process of proposing, negotiating and implementing a license or acquisition of a product
candidate  or  approved  product  is  lengthy  and  complex.  Other  companies,  including  some  with  substantially  greater  financial,  marketing  and  sales
resources, may compete with us for the license or acquisition of product candidates and approved products. Acquisitions and in-licenses include numerous
risks, including potential failure to achieve the expected benefits of the acquisition or license and potential unknown liabilities associated with the product
or  technology.  We  have  limited  resources  to  identify  and  execute  the  acquisition  or  in-licensing  of  third-party  products,  businesses,  and  technologies,
integrate them into our current infrastructure and manage our development efforts.

Even if we receive marketing approval of our current or future product candidates, we will be subject to ongoing regulatory obligations and continued
regulatory review.

Any marketing approvals that we receive for our current and future product candidates may be subject to limitations on the approved indicated uses for
which  the  product  may  be  marketed  or  the  conditions  of  approval  or  contain  requirements  for  potentially  costly  post-market  testing  and  surveillance  to
monitor the safety and efficacy of the product candidate. In addition, if the FDA or a comparable foreign regulatory authority approves any of our current
or  future  product  candidates,  the  manufacturing  processes,  labeling,  packaging,  distribution,  adverse  event  reporting,  storage,  advertising,  promotion,
import and export and record keeping for our current and future product candidates will be subject to extensive and ongoing regulatory requirements. These
requirements include submissions of safety and other post-marketing information and reports, registration, as well as continued compliance with current
good manufacturing practice, or cGMP, and GCPs for any clinical trials that we conduct post-approval. Failure to comply with regulatory requirements,
may result in, among other things:

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restrictions on the marketing or manufacturing of our product candidates, withdrawal of the product from the market, or product recalls;

fines, untitled and warning letters, or holds on clinical trials;

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refusal  by  the  FDA  to  approve  pending  applications  or  supplements  to  approved  applications  we  filed  or  suspension  or  revocation  of  license
approvals;

product seizure or detention, or refusal to permit the import or export of our product candidates; and

injunctions or the imposition of civil or criminal penalties.

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

Even if our current and future product candidates receive marketing approval, they may fail to achieve the degree of market acceptance by physicians,
patients, third-party payors and others in the medical community necessary for commercial success.

If  our  current  and  future  product  candidates  receive  marketing  approval,  whether  as  a  single  agent  or  in  combination  with  other  therapies,  they  may
nonetheless fail to gain sufficient market acceptance by physicians, patients, third-party payors, and others in the medical community. If our current and
future product candidates do not achieve an adequate level of acceptance, we may not generate significant product revenues or receive significant milestone
or royalty payments, and we may not become profitable.

Risks Related to Manufacturing, Commercialization and Reliance on Third Parties

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

We do not have the ability to independently conduct clinical trials. We rely and will rely on medical institutions, clinical investigators, contract laboratories,
and other third parties, such as CROs, to conduct or otherwise support our ongoing clinical trials, including processing of human blood and tumor samples
and analysis of biomarkers from the clinical trials. We rely and will rely heavily on these parties for execution of clinical trials for our current and future
product candidates, and we control only certain aspects of their activities. Nevertheless, we are responsible for ensuring that each of our clinical trials is
conducted in accordance with the applicable protocol, legal and regulatory requirements and scientific standards, and our reliance on these third parties
including CROs will not relieve us of our regulatory responsibilities. For any violations of laws and regulations during the conduct of our clinical trials, we
could be subject to untitled and warning letters or enforcement action that may include civil penalties up to and including criminal prosecution.

We  and  our  clinical  investigators  and  CROs  are  required  to  comply  with  regulations  and  requirements,  including  GCP,  for  conducting,  monitoring,
recording and reporting the results of clinical trials to ensure that the data and results are scientifically credible and accurate, and that the trial patients are
adequately informed of the potential risks of participating in clinical trials and their rights are protected. If we or our clinical investigators or CROs fail to
comply with applicable GCP, the clinical data generated in our clinical trials may be deemed unreliable, and the FDA or comparable foreign regulatory
authorities  may  require  us  to  perform  additional  clinical  trials  before  approving  our  marketing  applications.  We  cannot  assure  stockholders  that,  upon
inspection, the FDA will determine that any of our current or future clinical trials will comply with GCP. In addition, our clinical trials must be conducted
with product candidates produced under cGMP regulations. Our failure or the failure of our clinical investigators or CROs to comply with these regulations
may require us to repeat clinical trials, which would delay the marketing approval process and could also subject us to enforcement action. We also are
required to register certain ongoing clinical trials and provide certain information, including information relating to the trial’s protocol, on a government-
sponsored database, ClinicalTrials.gov, within specific time frames. Failure to do so can result in fines, adverse publicity and civil and criminal sanctions.

Although we designed the clinical trials for JTX-8064, vopratelimab and JTX-4014 and intend to design the clinical trials for future product candidates,
clinical  investigators  or  CROs  will  conduct  all  of  the  clinical  trials.  As  a  result,  many  important  aspects  of  our  development  programs,  including  their
conduct and timing, will be outside of our direct control. Our reliance on third parties to conduct clinical trials will also result in less direct control over the
management of data developed through clinical trials than would be the case if we were relying entirely upon our own staff. Communicating with outside
parties can be challenging, potentially leading to mistakes as well as difficulties in coordinating activities. Outside parties may also face internal challenges
that may materially adversely affect the willingness or ability of such parties to conduct our clinical trials and may subject us to unexpected cost increases
that are beyond our control. If the clinical investigators or CROs do not perform clinical trials in a satisfactory manner, breach their obligations to us or fail
to comply with regulatory requirements, the development, marketing approval and commercialization of our current and future product candidates may be
delayed, or our development programs may be materially and irreversibly harmed. If we are unable to rely on clinical data collected by our

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clinical investigators and CROs, we could be required to repeat, extend the duration of, or increase the size of any clinical trials we conduct, and this could
significantly delay commercialization and require significantly greater expenditures.

If clinical investigators or CROs do not successfully carry out their contractual duties or obligations or meet expected deadlines, if they need to be replaced
or if the quality or accuracy of the clinical data they obtain are compromised due to the failure to adhere to our clinical protocols, regulatory requirements
or for other reasons, any clinical trials such clinical investigators or CROs are associated with may be extended, delayed or terminated. For example, in
EMERGE, due to a site error, we enrolled additional patients to achieve the number of patients required for our statistical analysis. If our clinical trials are
extended, delayed or terminated, we believe that our financial results and the commercial prospects for our current and future product candidates in the
subject indication would be harmed, our costs could increase and our ability to generate revenue could be delayed.

Furthermore, if clinical investigators or CROs experience adverse impacts from the COVID-19 pandemic, including staffing shortages, travel restrictions,
prioritization of healthcare resources toward pandemic efforts, our clinical development efforts and plans for data disclosures may be delayed.

Because we rely on third-party manufacturing and supply partners, including a single supplier for some of our materials, our supply of research and
development, preclinical and clinical development materials may become limited or interrupted or may not be of satisfactory quantity or quality.

We rely on third-party contract manufacturers to manufacture our preclinical and clinical trial product supplies. We do not own manufacturing facilities for
producing such supplies. There can be no assurance that our preclinical and clinical development product supplies will not be limited, interrupted, or of
satisfactory quality or continue to be available at acceptable prices. Our or a third party’s failure to execute on our manufacturing requirements, or to do so
on commercially reasonable terms and comply with cGMP could adversely affect our business in a number of ways, including:

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an inability to initiate or continue clinical trials of our current or future product candidates under development;

delay in submitting regulatory applications, or receiving marketing approvals, for our current or future product candidates;

loss of cooperation of an existing or future collaborator;

subjecting third-party manufacturing facilities or our manufacturing facilities to additional inspections by regulatory authorities; and

requirements to cease distribution or to recall batches of our current or future product candidates.

In the event that any of our manufacturers fails to comply with applicable regulatory requirements and facility and process validation tests or to perform its
obligations  to  us  in  relation  to  quality,  timing  or  otherwise,  or  if  our  supply  of  components  or  other  materials  becomes  limited  or  interrupted  for  other
reasons,  we  may  be  forced  to  manufacture  the  materials  ourselves,  for  which  we  currently  do  not  have  the  capabilities  or  resources,  or  enter  into  an
agreement with another third party, which we may not be able to do on reasonable terms, if at all. In some cases, the technical skills or technology required
to  manufacture  our  future  product  candidates  may  be  unique  or  proprietary  to  the  original  manufacturer,  which  would  increase  our  reliance  on  such
manufacturer or require us to obtain a license from such manufacturer in order to have another third party manufacture such future product candidates. In
particular,  any  replacement  of  our  manufacturer  could  require  significant  effort  and  expertise  because  there  may  be  a  limited  number  of  qualified
replacements. If we are required to change manufacturers for any reason, we will be required to verify that the new manufacturer maintains facilities and
procedures  that  comply  with  quality  standards  and  with  all  applicable  regulations  and  guidelines,  which  could  negatively  affect  our  ability  to  develop
product candidates in a timely manner or within budget.

Certain raw materials necessary for the manufacture of our product candidates under our current manufacturing process, such as growth media, resins and
filters,  are  available  from  a  single  supplier.  We  do  not  have  agreements  in  place  that  guarantee  our  supply  or  the  price  of  these  raw  materials.  Any
significant delay in the acquisition or decrease in the availability of these raw materials could considerably delay the manufacture of our current and future
product candidates, which could adversely impact the timing of any planned trials or the marketing approval of that product candidate.

If  any  of  our  third-party  manufacturing  and  supply  partners  experience  adverse  impacts  from  the  COVID-19  pandemic,  including  staffing  shortages,
production slowdowns, disruptions in delivery systems or government restrictions or limitations, the development of diagnostics for our clinical trials or
our  supply  chain  may  be  disrupted.  For  example,  under  the  Defense  Production  Act,  the  U.S.  government  may,  among  other  things,  require  domestic
industries  to  provide  essential  goods  and  services  needed  for  the  national  defense,  such  as  drug  material  or  other  supplies  needed  to  diagnose  or  treat
COVID-19 patients, which could require third parties to allocate resources in a way that impacts our operations. These impacts may limit our ability

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to conduct our clinical trials, continue our research and development operations, and manufacture our product candidates for our clinical trials.

We  expect  to  continue  to  rely  on  third-party  manufacturers  if  we  receive  marketing  approval  for  any  product  candidate.  If  we  are  unable  to  obtain  or
maintain third-party manufacturing for our current and future product candidates, or to do so on commercially reasonable terms, we may not be able to
develop and commercialize our current or future product candidates successfully. We do not yet have sufficient information to reliably estimate the cost of
the commercial manufacture of any future product candidate.

In  addition,  in  order  to  conduct  clinical  trials  of  our  current  and  future  product  candidates,  we  will  need  to  work  with  third-party  manufacturers  to
manufacture them in large quantities. Our manufacturing partners or our third-party collaborators may be unable to successfully increase the manufacturing
capacity of our current and future product candidates in a timely or cost-effective manner, or at all. In addition, quality issues may arise during scale-up
activities. If our manufacturing partners or collaborators are unable to successfully scale up the manufacture of our current or future product candidates in
sufficient quality and quantity, the development, testing, and clinical trials of that product candidate may be delayed or infeasible, and marketing approval
or commercial launch of any resulting product may be delayed or not obtained, which could significantly harm our business.

We  expect  to  develop  our  current  and  future  product  candidates  in  combination  with  other  drugs.  If  we  are  unable  to  enter  into  a  strategic
collaboration for, or if we are unable to purchase on commercially reasonable terms, an approved or investigational cancer drug to use in combination
with our product candidates, we may be unable to develop or obtain approval for our current and future product candidates in combination with other
drugs.

We  intend  to  develop  our  current  and  future  product  candidates  in  combination  with  one  or  more  other  cancer  drugs.  If  the  FDA  or  similar  regulatory
authorities outside of the United States revoke or do not grant approval of any drugs we use in combination with our current or future product candidates,
we will not be able to market any products in combination with such drugs.

If safety or efficacy issues arise with any of these drugs, we could experience significant regulatory delays, and the FDA or similar regulatory authorities
outside of the United States may require us to redesign or terminate the applicable clinical trials. If the drugs we use are replaced as the standard of care for
the indications we choose for our current or future product candidates, the FDA or similar regulatory authorities outside of the United States may require us
to conduct additional clinical trials. In addition, if manufacturing or other issues result in a shortage of supply of the drugs with which we determine to
combine with our current or future product candidates, we may not be able to complete clinical development of vopratelimab, JTX-4014 or future product
candidates on our current timeline or at all.

Even if our current or future product candidates were to receive marketing approval or be commercialized for use in combination with other existing drugs,
we  would  continue  to  be  subject  to  the  risks  that  the  FDA  or  similar  regulatory  authorities  outside  of  the  United  States  could  revoke  approval  of  such
existing drugs or that safety, efficacy, manufacturing or supply issues could arise with such drugs.

We may form or seek strategic collaborations to evaluate and, if approved, market JTX-8064, vopratelimab and JTX-4014 in combination with another
approved  or  investigational  cancer  drug.  If  we  are  unable  to  enter  into  a  strategic  collaboration  on  commercially  reasonable  terms  or  fail  to  realize  the
benefits of any such collaboration, we may be required to purchase an approved cancer drug to use in combination with JTX-8064, vopratelimab and/or
JTX-4014. The failure to enter into a successful collaboration or the expense of purchasing an approved cancer drug may delay our development timelines,
increase our costs and jeopardize our ability to develop JTX-8064, vopratelimab and JTX-4014.

We are subject to manufacturing risks that could substantially increase our costs and limit the supply of our products.

The process of manufacturing our current or future product candidates is complex, highly regulated and subject to several risks, including:

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We do not have the capability internally to manufacture drug products or drug substances for clinical use. We use third-party manufacturers for
manufacturing JTX-8064, vopratelimab and JTX-4014 for our ongoing and anticipated clinical trials. Any changes in our manufacturing processes
as a result of scaling-up may require additional approvals or may delay the development and marketing approval of our current and future product
candidates and ultimately affect our success.

The  manufacturing  facilities  in  which  our  current  and  future  product  candidates  are  made  could  be  adversely  affected  by  equipment  failures,
contamination, vendor error, labor shortages, natural disasters, power failures and numerous other factors.

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Any  adverse  developments  affecting  manufacturing  operations  for  our  current  or  future  product  candidates,  if  any  are  approved,  may  result  in
shipment delays, inventory shortages, lot failures, product withdrawals or recalls, or other interruptions in the supply of our products. We may also
have to take inventory write-offs and incur other charges and expenses for products that fail to meet specifications, undertake costly remediation
efforts or seek more costly manufacturing alternatives.

Biologics,  such  as  JTX-8064,  vopratelimab  and  JTX-4014,  that  have  been  produced  and  are  stored  for  later  use  may  degrade,  become
contaminated, suffer other quality defects or may not be used within their shelf life, which may cause the affected product candidates to no longer
be suitable for their intended use in clinical trials or other development activities. If the defective product candidates cannot be replaced in a timely
fashion, we may incur significant delays in our development programs that could adversely affect the value of such product candidates.

We face significant competition and if our competitors develop and market products that are more effective, safer or less expensive than any of our
current or future product candidates, our commercial opportunities will be negatively impacted.

The life sciences industry is highly competitive and subject to rapid and significant technological change. We are currently developing therapeutics that will
compete with other products and therapies that currently exist or are being developed, such as approved immunotherapy antibodies, the anti-ILT4 antibody
of Merck & Co., Inc., the anti-ICOS antibodies of Bristol Myers Squibb, GlaxoSmithKline plc, or Kymab Group Ltd., or Xencor, Inc.’s anti-PD-1 and anti-
ICOS bispecific antibody. Products we may develop in the future are also likely to face competition from other products and therapies, some of which we
may not currently be aware. Technological advances or products developed by our competitors may render our technologies or product candidates obsolete,
less competitive or not economical.

We  have  both  domestic  and  international  competitors,  including  major  multinational  pharmaceutical  companies,  established  biotechnology  companies,
specialty pharmaceutical companies, universities and other research institutions and small and other early-stage companies. Many of our competitors have
significantly  greater  financial,  manufacturing,  marketing,  product  development,  technical  and  human  resources  than  we  do.  Large  pharmaceutical
companies, in particular, have extensive experience in clinical testing, obtaining marketing approvals, establishing clinical trial sites, recruiting patients and
in manufacturing pharmaceutical products and may succeed in discovering, developing and commercializing products in our field before we do. Currently,
GlaxoSmithKline plc is conducting a Phase 3 trial of its anti-ICOS antibody and, given their resources, they will likely be able to develop their product
candidate  faster  than  we  are  able  to  develop  vopratelimab.  We  also  face  competition  in  recruiting  and  retaining  qualified  scientific  and  management
personnel, as well as in acquiring technologies complementary to, or necessary for, our programs.

There  are  a  large  number  of  companies  developing  or  marketing  treatments  for  cancer,  including  many  major  pharmaceutical  and  biotechnology
companies. These treatments consist both of small molecule drug products, as well as biologics, as approaches to address cancer. These treatments are often
combined with one another in an attempt to maximize the response rate and clinical benefit.

Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have
fewer or less severe side effects, are more convenient, have a broader label, are marketed more effectively, are reimbursed or are less expensive than any
products that we may develop. Our competitors also may obtain FDA, European Commission or other marketing approval for their products more rapidly
than we may obtain approval for ours, which could result in our competitors establishing a strong market position before we are able to enter the market.
Even  if  our  current  and  future  product  candidates  achieve  marketing  approval,  they  may  be  priced  at  a  significant  premium  over  competitive  products,
resulting in reduced competitiveness. In addition, if any of our current or future product candidates are approved by the FDA, the approval of a biosimilar
product to one of our products could have a material impact on our business.

We will depend on Gilead to develop, manufacture and commercialize JTX-1811 and may depend on additional third parties for the development and
commercialization of our other product candidate programs. If these programs are not successful, we may not receive significant payments from such
third parties or we may not be able to capitalize on the market potential of these product candidates.

In August 2020, we entered into a License Agreement, or the Gilead License Agreement, with Gilead pursuant to which we granted Gilead an exclusive,
worldwide  license  to  develop,  manufacture  and  commercialize  JTX-1811.  The  Gilead  License  Agreement  provides  for  potential  payments  to  us  from
Gilead upon the achievement of specified development, regulatory and sales milestones, and potential royalty-based revenue if JTX-1811 is successfully
commercialized. As a result of this license, we will not control the nature, timing or cost of bringing JTX-1811 to market. We cannot provide any assurance
with respect to the success of the license, and we may never receive any milestone or royalty payments pursuant to the Gilead License Agreement.

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We may form or seek other strategic alliances, joint ventures, or collaborations, or enter into additional licensing arrangements with third parties that we
believe will complement or augment our development and commercialization efforts with respect to our current and future product candidates that we may
develop.

Collaborations and other strategic transactions, including licensing arrangements, involving our product candidates pose the following risks to us:

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Collaborators, including licensors, have significant discretion in determining the efforts and resources that they will apply to these collaborations.
For  example,  after  the  clearance  of  an  Investigational  New  Drug  application  for  JTX-1811  by  the  FDA  or  an  earlier  date  specified  by  Gilead,
development and commercialization plans and strategies for JTX-1811 will be conducted by Gilead.

Collaborators may not pursue development and commercialization of any of our current or future product candidates or may elect not to continue
or  renew  development  or  commercialization  programs  based  on  clinical  trial  results,  changes  in  their  strategic  focus  due  to  the  acquisition  of
competitive products, availability of funding or other external factors such as a business combination that diverts resources or creates competing
priorities.

Collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial, 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.

A  collaborator  with  marketing  and  distribution  rights  to  one  or  more  products  may  not  commit  sufficient  resources  to  their  marketing  and
distribution.

Collaborators may in-license, own or co-own intellectual property covering our products that results from our collaborating with them, and in such
cases,  we  would  not  have  the  exclusive  right  to  develop,  commercialize,  enforce,  maintain  or  defend  such  intellectual  property.  For  example,
Gilead has the first right to enforce, maintain or defend our intellectual property rights for JTX-1811 under the Gilead License Agreement.

Collaborators may not properly enforce, maintain or defend our intellectual property rights or may use our proprietary information in a way that
gives rise to actual or threatened litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to
potential litigation, or other intellectual property proceedings.

Disputes may arise between a collaborator and us that cause the delay or termination of the research, development or commercialization of our
current and future product candidates, or that result in costly litigation or arbitration that diverts management attention and resources.

Collaborations  may  be  terminated  and,  if  terminated,  may  result  in  a  need  for  additional  capital  to  pursue  further  development  or
commercialization of the applicable product candidates.

Collaboration agreements may not lead to development or commercialization of product candidates in the most efficient manner or at all.

Collaboration or licensing agreements may restrict our right to independently pursue new product candidates.

As a result, if we enter into additional collaboration agreements and strategic partnerships or license our intellectual property, products or businesses, we
may not be able to realize the benefit of, or generate revenues from, such arrangements.

All of the risks relating to product development, regulatory approval and commercialization described in this Annual Report on Form 10-K also apply to
the activities of Gilead with respect to the development and commercialization of JTX-1811 and would also apply to the activities of any future licensees or
collaborators.

We may seek to establish additional collaborations, and, if we are not able to establish them on commercially reasonable terms, we may have to alter
our development and commercialization plans.

Our drug development programs and the potential commercialization of our product candidates will require substantial additional resources. For some of
our  product  candidates,  we  may  decide  to  collaborate  with  additional  pharmaceutical  and  biotechnology  companies  for  the  development  and  potential
commercialization of those product candidates. Any of these relationships may require us to incur non-recurring and other charges, increase our near and
long-term expenditures, issue securities that dilute our existing stockholders, or disrupt our management and business.

We face significant competition in seeking appropriate strategic partners and the negotiation process is time consuming and complex. Whether we reach a
definitive agreement for other collaborations will depend, among other things, upon our

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assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation
of our business. We may not be successful in our efforts to establish a strategic partnership or other alternative arrangements for future product candidates
because  they  may  be  deemed  to  be  at  too  early  of  a  stage  of  development  for  collaborative  effort  and  third  parties  may  not  view  them  as  having  the
requisite  potential  to  demonstrate  safety  and  efficacy.  In  addition,  there  have  been  a  significant  number  of  recent  business  combinations  among  large
pharmaceutical companies that have resulted in a reduced number of potential future collaborators.

We may also be restricted under existing agreements from entering into future agreements on certain terms with potential collaborators. For example, under
the Gilead License Agreement, we have granted worldwide exclusive rights to Gilead for any antibody or other agent that is specifically directed to CCR8,
and this exclusivity would limit our ability to enter into future strategic collaborations with other partners.

We  may  not  be  able  to  negotiate  collaborations  on  a  timely  basis,  on  acceptable  terms,  or  at  all.  If  we  are  unable  to  do  so,  we  may  have  to  curtail  the
development  of  the  product  candidate  for  which  we  are  seeking  to  collaborate,  reduce  or  delay  its  development  program,  delay  or  reduce  the  scope  of
potential commercialization activities, or increase our expenditures and undertake development or commercialization activities at our own expense. If we
elect to increase our expenditures to fund development or commercialization activities on our own, we may need to obtain additional capital, which may
not be available to us on acceptable terms or at all.

The market opportunities for our current and future products, if and when approved, may be limited to those patients who are ineligible for established
therapies or for whom prior therapies have failed, and may be small.

Cancer therapies are sometimes characterized as first-line, second-line, or third-line, and the FDA often approves new therapies initially only for third-line
use.  When  cancer  is  detected  early  enough,  first-line  therapy,  usually  chemotherapy,  hormone  therapy,  surgery,  radiation  therapy,  and,  increasingly,
immunotherapies or a combination of these, is sometimes adequate to cure the cancer or prolong life without a cure. Second and third-line therapies are
administered to patients when prior therapy is not effective. We expect to initially seek approval of our current and future product candidates as a therapy
for patients who have received one or more prior treatments. Subsequently, for those products that prove to be sufficiently beneficial, if any, we would
expect to seek approval potentially as a first-line therapy, but there is no guarantee that any of our product candidates, even if approved, would be approved
for first-line therapy, and, prior to any such approvals, we may have to conduct additional clinical trials.

Our projections of both the number of people who have the cancers we are targeting, as well as the subset of people with these cancers who have received
one or more prior treatments, and who have the potential to benefit from treatment with our current and future product candidates, are based on our beliefs
and  estimates.  These  estimates  have  been  derived  from  a  variety  of  sources,  including  scientific  literature,  surveys  of  clinics,  patient  foundations,  and
market research, and may prove to be incorrect. Further, new studies may change the estimated incidence or prevalence of these cancers. The number of
patients may turn out to be lower than expected. Additionally, the potentially addressable patient population for our current and future product candidates
may be limited or may not be amenable to treatment with any of our products, if and when approved. Even if we obtain significant market share for any of
our products, if and when approved, because the potential target populations may be small, we may never achieve profitability without obtaining marketing
approval for additional indications, including to be used as first- or second-line therapy.

We  may  develop  companion  diagnostics  and/or  complementary  diagnostics  for  our  current  and  future  product  candidates.  If  we  are  unable  to
successfully develop such companion diagnostics or complementary diagnostics, or experience significant delays in doing so, we may not realize the
full commercial potential of our current or future product candidates.

Because we are focused on patient selection and enrichment strategies, in which predictive biomarkers may be used to identify the right patients for our
product candidates, we believe that our success may depend, in part, on our ability to develop companion diagnostics and/or complementary diagnostics,
which are assays or tests to identify an appropriate patient population for our product candidates. There has been limited success to date industry-wide in
developing these types of companion diagnostics and/or complementary diagnostics. To be successful, we need to address a number of scientific, technical
and logistical challenges. We have not yet initiated development of companion diagnostics and/or complementary diagnostics, and the process of obtaining
or  creating  such  a  diagnostic  is  time  consuming  and  costly.  We  have  little  experience  in  the  development  of  diagnostics  and  may  not  be  successful  in
developing  appropriate  diagnostics  to  pair  with  any  of  our  product  candidates  that  receive  marketing  approval.  Companion  diagnostics  and/or
complementary diagnostics are subject to regulation by the FDA and similar regulatory authorities outside the United States as medical devices and require
separate regulatory approval or clearance prior to commercialization. Given our limited experience in developing diagnostics, we expect to rely in part or in
whole on third parties for their design and manufacture. If we are unable to engage a third party to assist us, or if we, or any third parties that we engage,
are unable to successfully develop companion diagnostics and/or complementary diagnostics for our current and future product candidates, or experience
delays in doing so:

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the  development  of  our  current  and  future  product  candidates  may  be  adversely  affected  if  we  are  unable  to  appropriately  select  patients  for
enrollment in our clinical trials;

our  current  and  future  product  candidates  may  not  receive  marketing  approval  if  safe  and  effective  use  of  a  product  candidate  depends  on
companion diagnostics and/or complementary diagnostics and such a diagnostic is not commercially available or otherwise approved or cleared by
the appropriate regulatory authority; and

we  may  not  realize  the  full  commercial  potential  of  our  current  and  future  product  candidates  that  receive  marketing  approval  if,  among  other
reasons, we are unable to appropriately identify, or it takes us longer to identify, patients who are likely to benefit from therapy with our products,
if approved.

If any of these events were to occur, our business would be harmed, possibly materially.

If product liability lawsuits are brought against us, we may incur substantial liabilities.

We face an inherent risk of product liability as a result of the clinical testing of our current and future product candidates. For example, we may be sued if
our product candidates cause or are perceived to cause injury or are 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 or 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.  Even  successful  defense  would  require  significant  financial  and
management resources. Regardless of the merits or eventual outcome, we may experience financial or reputational losses in the future due to such product
liability claims.

Insurance  coverage  is  increasingly  expensive.  We  may  not  be  able  to  maintain  insurance  at  a  reasonable  cost  or  in  an  amount  adequate  to  satisfy  any
liability that may arise, if at all. Our insurance policy contains various exclusions, and we may be subject to a product liability claim for which we have no
coverage. We may 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.  Even  if  our  agreements  with  any  future  corporate
collaborators entitle us to indemnification against losses, such indemnification may not be available or adequate should any claim arise.

Adverse events in the field of immuno-oncology could damage public perception of our product candidates and negatively affect our business.

The commercial success of our products will depend in part on public acceptance of the use of cancer immunotherapies. Adverse events in clinical trials of
any  of  our  current  or  future  product  candidates  or  other  similar  products  and  the  resulting  publicity,  as  well  as  any  other  adverse  events  in  the  field  of
immuno-oncology that may occur, including in connection with competitor therapies such as approved immunotherapy antibodies, the clinical-stage anti-
ILT4 antibody of Merck, anti-ICOS antibodies of Bristol Myers Squibb, GlaxoSmithKline plc or Kymab Group Ltd., or Xencor, Inc.’s anti-PD-1 and anti-
ICOS bispecific antibody, could result in a decrease in demand for JTX-8064, vopratelimab, JTX-4014 or other products that we may develop. If public
perception is influenced by claims that the use of cancer immunotherapies is unsafe, whether related to our or our competitors’ therapies, our products may
not be accepted by the general public or the medical community.

Future  adverse  events  in  immuno-oncology  or  the  biopharmaceutical  industry  could  also  result  in  greater  governmental  regulation,  stricter  labeling
requirements  and  potential  regulatory  delays  in  the  testing  or  approvals  of  our  products.  Any  increased  scrutiny  could  delay  or  increase  the  costs  of
obtaining marketing approval for our current and future product candidates.

Healthcare legislative reform measures may have a material adverse effect on our business and results of operations.

In the United States, there have been and continue to be a number of legislative initiatives to contain healthcare costs. For example, in March 2010, the
Affordable Care Act, or ACA, was passed, which substantially changes the way health care is financed by both governmental and private insurers, and
significantly impacts the U.S. pharmaceutical industry.

Since its enactment, there have been numerous judicial, administrative, executive and legislative challenges to certain aspects of the ACA, and we expect
there be to additional challenges and amendments to the ACA in the future. Various portions of the ACA are currently undergoing legal and constitutional
challenges  in  the  United  States  Supreme  Court;  the  Trump  Administration  issued  various  Executive  Orders  that  eliminated  cost  sharing  subsidies  and
various  provisions  that  would  impose  a  fiscal  or  regulatory  burden  on  states,  individuals,  healthcare  providers,  health  insurers,  or  manufacturers  of
pharmaceuticals or medical devices; and Congress has introduced several pieces of legislation aimed at significantly revising or repealing the ACA. The
United States Supreme Court is expected to rule on a legal challenge to the constitutionality of the ACA in early 2021.

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The  implementation  of  the  ACA  is  ongoing,  and  the  law  appears  likely  to  continue  the  downward  pressure  on  pharmaceutical  pricing.  Litigation  and
legislation related to the ACA are likely to continue, with unpredictable and uncertain results. It is unclear whether the ACA will be overturned, repealed,
replaced, or further amended. We cannot predict what effect further changes to the ACA would have on our business. We expect that additional state and
federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for
healthcare products and services, which could result in reduced demand for our product candidates, companion diagnostics or complementary diagnostics,
or additional pricing pressures.

Our future relationships with 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, transparency, health information privacy and security and other healthcare laws and regulations, which
could  expose  us  to  criminal  sanctions,  civil  penalties,  contractual  damages,  reputational  harm,  administrative  burdens  and  diminished  profits  and
future earnings.

Our  future  arrangements  with  third-party  payors  and  customers  may  expose  us  to  broadly  applicable  fraud  and  abuse  and  other  healthcare  laws  and
regulations.  In  addition,  we  may  be  subject  to  transparency  laws  and  patient  privacy  regulation  by  the  U.S.  federal  and  state  governments  and  by
governments in foreign jurisdictions in which we conduct our business. The applicable federal, state and foreign healthcare laws and regulations that may
affect our ability to operate include the federal Anti-Kickback Statute, the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA,
as  amended  by  the  Health  Information  Technology  for  Economic  and  Clinical  Health  Act  of  2009  the  federal  legislation  commonly  referred  to  as  the
Physician  Payments  Sunshine  Act,  and  analogous  state  and  foreign  laws  and  regulations,  any  of  which  may  constrain  the  business  or  financial
arrangements and relationships through which we sell, market and distribute any products for which we obtain marketing approval.

Because of the breadth of these laws and the narrowness of the statutory exceptions and regulatory safe harbors available under such laws, it is possible that
some of our business activities could be subject to challenge under one or more of such laws. The scope and enforcement of each of these laws is also
uncertain and any investigation or settlement could be time- and resource-consuming, divert management’s attention, increase our costs or otherwise have
an adverse effect on our business.

If our operations are found to be in violation of any of the laws described above or any other government regulations that apply to us, we may be subject to
various  significant  penalties,  any  of  which  could  harm  our  ability  to  operate  our  business  and  our  financial  results.  In  addition,  the  approval  and
commercialization of our product candidates outside the United States will also likely subject us to foreign equivalents of the healthcare laws mentioned
above, among other foreign laws.

Risks Related to our Financial Position and Need for Additional Capital

We have accumulated significant losses since our inception and anticipate that we will continue to incur substantial net losses in the foreseeable future.

We are a clinical-stage biopharmaceutical company with a limited operating history, and we are in the early stages of our development efforts. Investment
in  biopharmaceutical  product  development  is  highly  speculative  because  it  entails  substantial  upfront  capital  expenditures  and  significant  risk  that  any
potential  product  candidate  will  fail  to  demonstrate  adequate  effect  or  an  acceptable  safety  profile,  gain  marketing  approval  and  become  commercially
viable.  We  have  financed  our  operations  primarily  through  the  sale  of  equity  securities  and  through  our  license  and  collaboration  arrangements  with
Celgene and Gilead. Since our inception, most of our resources have been dedicated to the preclinical and clinical development of our product candidates
and  discovery  programs.  We  have  no  products  approved  for  commercial  sale  and  have  not  generated  any  revenue  from  product  sales  to  date,  and  we
continue to incur significant research and development and other expenses related to our ongoing operations.

While  we  recognized  net  income  of  $56.8  million  for  the  year  ended  December  31,  2019  as  a  result  of  revenue  recognized  under  our  agreements  with
Celgene, we incurred a net loss of $43.8 million for the year ended December 31, 2020. As of December 31, 2020, we had an accumulated deficit of $151.0
million.  We  expect  to  incur  significant  losses  for  the  foreseeable  future,  and  we  expect  these  losses  to  increase  as  we  continue  our  research  and
development of, and seek marketing approvals for, our current and future product candidates.

Even  if  we  succeed  in  receiving  marketing  approval  for  and  commercialize  our  product  candidates,  we  will  continue  to  incur  substantial  research  and
development  and  other  expenditures  to  develop  and  market  additional  potential  products.  We  may  encounter  unforeseen  expenses,  difficulties,
complications, delays and other unknown factors that may adversely affect our business. The size of our future net losses will depend, in part, on the rate of
future  growth  of  our  expenses  and  our  ability  to  generate  revenue.  Our  prior  losses  and  expected  future  losses  have  had  and  will  continue  to  have  an
adverse effect on our stockholders’ equity and working capital.

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We have never generated any revenue from product sales and our ability to generate revenue from product sales and become profitable depends on our
success on a number of factors.

We have no products approved for commercial sale, have not generated any revenue from product sales, and do not anticipate generating any revenue from
product sales until some time after we have received marketing approval for the commercial sale of a product candidate, if ever. Our ability to generate
revenue and achieve profitability depends significantly on our success in many factors, including:

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completing clinical development of JTX-8064, vopratelimab and JTX-4014;

completing preclinical development of JTX-1811 and obtaining IND clearance;

completing research, discovery, preclinical and clinical development of future product candidates;

obtaining marketing approvals for our current and future product candidates for which we complete clinical trials;

developing  a  sustainable  and  scalable  manufacturing  process  for  our  product  candidates,  including  establishing  and  maintaining  commercially
viable supply and manufacturing relationships with third parties;

launching  and  commercializing  our  product  candidates  for  which  we  obtain  marketing  approvals,  either  directly  or  with  a  collaborator  or
distributor;

obtaining market acceptance of our current and future product candidates as viable treatment options;

addressing any competing technological and market developments;

identifying, assessing, acquiring and developing new product candidates;

negotiating favorable terms in any collaboration, licensing, or other arrangements into which we may enter;

obtaining, maintaining, protecting, and expanding our portfolio of intellectual property rights, including patents, trade secrets and know-how; and

attracting, hiring and retaining qualified personnel.

Even if our product candidates or future product candidates that we develop are approved for commercial sale, we anticipate incurring significant costs
associated with commercializing any approved product candidate. These costs may fluctuate or exceed our expectations and our revenues will depend on
many factors that we cannot control or estimate. If we are not able to generate revenue from the sale of any approved products, we may never become
profitable.

We will require substantial additional financing to achieve our goals, and a failure to obtain this necessary capital when needed could force us to delay,
limit, reduce or terminate our product development or commercialization efforts.

Our operations have consumed substantial amounts of cash since inception. As of December 31, 2020, our cash, cash equivalents, short-term and long-term
investments were $213.2 million. We expect to continue to spend substantial amounts to continue the clinical development of JTX-8064, vopratelimab and
JTX-4014  and  preclinical  and  clinical  development  of  future  product  candidates.  If  we  are  able  to  gain  marketing  approval  for  any  of  our  product
candidates, we will require significant additional amounts of cash in order to launch and commercialize those product candidates to the extent that such
launch and commercialization are not the responsibility of a collaborator or a licensee. In addition, other unanticipated costs may arise. Because the design
and outcome of our planned and anticipated clinical trials are highly uncertain, we cannot reasonably estimate the actual amounts necessary to successfully
complete the development and commercialization of our current and future product candidates. Our future capital requirements depend on many factors,
including:

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the scope, progress, results and costs of researching and developing our product candidates, and conducting preclinical studies and clinical trials,
including the impacts of the COVID-19 pandemic on the timing and progress of our ongoing and planned clinical trials;

the timing of, and the costs involved in, obtaining marketing approvals for our product candidates if clinical trials are successful;

the cost of commercialization activities for our product candidates, that are approved for sale, including marketing, sales and distribution costs;

the cost of manufacturing our product candidates for clinical trials in preparation for marketing approval and in preparation for commercialization;

our ability to establish and maintain strategic licensing or other arrangements and the financial terms of such agreements;

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the costs involved in preparing, filing, prosecuting, maintaining, expanding, defending and enforcing patent claims, including litigation costs and
the outcome of such litigation;

the timing, receipt, and amount of sales of, or royalties on, our future products, if any;

the emergence of competing cancer therapies and other adverse market developments; and

the requirement for and cost of developing companion diagnostics and/or complementary diagnostics.

Until we can generate sufficient product and royalty revenue to finance our cash requirements, which we may never do, we expect to finance our future
cash needs through a combination of public or private equity offerings, debt financings, collaborations, strategic alliances, licensing arrangements and other
marketing or distribution arrangements. Based on our research and development plans, we expect that our existing cash, cash equivalents, short-term and
long-term investments will enable us to fund our operating expenses and capital expenditure requirements through the second quarter of 2023.

If we are unable to obtain adequate financing on favorable terms when needed, we may have to delay, reduce the scope of or suspend one or more of our
clinical  trials  or  research  and  development  programs  or  our  commercialization  efforts.  Further,  our  ability  to  raise  additional  capital  may  be  adversely
impacted by potential worsening global economic conditions and disruptions to and volatility in the credit and financial markets in the United States and
worldwide resulting from the ongoing COVID-19 pandemic.

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

Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of private and public
equity offerings, debt financings, collaborations, strategic alliances and licensing arrangements. To the extent that we raise additional capital through the
sale of common stock or securities convertible or exchangeable into common stock, stockholders’ ownership interest will be diluted, and the terms of these
securities may include liquidation or other preferences that adversely affect our stockholders’ rights. Debt financing, if available, would increase our fixed
payment  obligations  and  may  involve  agreements  that  include  covenants  limiting  or  restricting  our  ability  to  take  specific  actions,  such  as  incurring
additional debt, making capital expenditures or declaring dividends.

If  we  are  unable  to  raise  additional  funds  through  equity  or  debt  financings  when  needed,  and  instead  raise  additional  capital  through  marketing  and
distribution agreements or other collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish certain valuable
rights to our current and future product candidates, technologies, future revenue streams or discovery programs or grant licenses on terms that may not be
favorable to us.

Risks Related to Intellectual Property

If we are unable to obtain, maintain and protect our intellectual property rights for our product candidates or if our intellectual property rights are
inadequate, our competitive position could be harmed.

Our commercial success will depend in part on our ability to obtain and maintain patent and other intellectual property protection in the United States and
other countries with respect to our product candidates. We rely on trade secret, patent, copyright and trademark laws, and confidentiality, licensing and
other  agreements  with  employees  and  third  parties,  all  of  which  offer  only  limited  protection.  We  currently,  or  will  in  the  future,  seek  to  protect  our
proprietary position by filing and prosecuting patent applications in the United States and abroad related to our current and future product candidates, and
any future novel technologies that are important to our business.

The  steps  we,  our  licensees  or  our  licensors  have  taken  to  protect  our  proprietary  rights  may  not  be  adequate  to  preclude  misappropriation  of  our
proprietary information or infringement of our intellectual property rights, both inside and outside of the United States. Filing, prosecuting and defending
patents  on  our  current  and  future  product  candidates  throughout  the  world  would  be  prohibitively  expensive,  and  intellectual  property  rights  in  some
countries outside the United States can be less extensive than those in the United States.

If we, our licensees or our licensors are unable to obtain and maintain patent protection for our current and future product candidates, or if the scope of the
patent  protection  obtained  is  not  sufficient,  our  competitors  could  develop  and  commercialize  products  similar  or  superior  to  ours,  and  our  ability  to
successfully commercialize our current and future product candidates and future technologies may be adversely affected.

Our  pending  applications  cannot  be  enforced  against  third  parties  unless  and  until  a  patent  issues  from  such  applications  and,  even  after  issuance,  such
patents may be challenged in the courts or patent offices in the United States and abroad. We are currently involved in an opposition proceeding in the
European Patent Office, and this proceeding may be ongoing for a number of years and may divert employee resources from our business. Additionally,
this and other such proceedings may result in the loss of patent protection, the narrowing of claims in such patents or the invalidity or unenforceability of
such patents, which

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could  limit  our  ability  to  stop  others  from  using  or  commercializing  similar  or  identical  products  or  limit  the  duration  of  the  patent  protection  for  our
current and future product candidates.

Many companies have encountered significant problems in protecting and defending intellectual property rights in certain foreign jurisdictions. Any efforts
to  enforce  our  intellectual  property  and  proprietary  rights  around  the  world  may  be  inadequate  to  obtain  a  significant  commercial  advantage  from  the
intellectual property we develop or license. Moreover, many countries have compulsory licensing laws under which a patent owner may be compelled to
grant licenses to third parties. If we or any of our licensors are forced to grant a license to third parties with respect to any patents relevant to our business,
our competitive position may be impaired, and our business and results of operations may be adversely affected.

Furthermore, we cannot predict whether any of our future patent applications will result in the issuance of patents that effectively protect our current and
future product candidates, or if any of our issued patents or if any of our licensor’s issued patents will effectively prevent others from commercializing
competitive products. In some cases, it may be difficult or impossible to detect third-party infringement or misappropriation of our intellectual property
rights, even in relation to issued patent claims, and proving any such infringement may be even more difficult. If we are unable to obtain, maintain, and
protect  our  intellectual  property  our  competitive  advantage  could  be  harmed,  and  it  could  result  in  a  material  adverse  effect  on  our  business,  financial
condition, and the results of operations and prospects.

Patent  terms  may  be  inadequate  to  protect  our  competitive  position  on  our  products  for  an  adequate  amount  of  time,  and  our  current  and  future
product candidates for which we intend to seek approval as biologic products may face competition sooner than anticipated.

Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might
expire before or shortly after such candidates are commercialized. We expect to seek patent term extensions of patent terms in the United States for our
issued  patents,  licensed  patents  and  any  patents  we  own  in  the  future  and,  if  available,  in  other  countries  where  that  may  be  available  when  we  are
prosecuting patents. In the United States, the Drug Price Competition and Patent Term Restoration Act of 1984 permits a patent term extension of up to five
years beyond the normal expiration of the patent, which is limited to the approved indication. However, the applicable authorities, including the FDA and
the United States Patent and Trademark Office, or USPTO, in the United States, and any equivalent regulatory authority in other countries, may not agree
with our assessment of whether such extensions are available, and may refuse to grant extensions to our patents, or may grant more limited extensions than
we request. We may not be granted an extension because of, for example, failure to exercise due diligence during the testing phase or regulatory review
process,  failure  to  apply  within  applicable  deadlines,  failure  to  apply  prior  to  expiration  of  relevant  patents  or  otherwise  failing  to  satisfy  applicable
requirements. If we are unable to obtain patent term extension or the term of any such extension is less than we request, our competitors may be able to take
advantage of our investment in development and clinical trials by referencing our clinical and preclinical data and launch their product earlier than might
otherwise be the case, which could result in a material adverse effect on our business, financial condition, results of operation and prospects.

The  Biologics  Price  Competition  and  Innovation  Act  of  2009,  or  BPCIA,  established  legal  authority  for  the  FDA  to  review  and  approve  biosimilar
biologics, including the possible designation of a biosimilar as “interchangeable” based on its similarity to an existing brand product. Under the BPCIA, an
application for a biosimilar product cannot be approved by the FDA until 12 years after the original branded product was approved under a BLA. The law
is  complex  and  is  still  being  interpreted  and  implemented  by  the  FDA.  As  a  result,  its  ultimate  impact,  implementation,  and  meaning  are  subject  to
uncertainty. While it is uncertain when such processes intended to implement BPCIA may be fully adopted by the FDA, any such processes could have a
material adverse effect on the future commercial prospects for our biological products.

We intend to seek market exclusivity for our biological product candidates that is subject to its own BLA for 12 years in the United States, 10 years in
Europe and other durations in other markets. However, the term of the patents that cover such product candidates may not extend beyond the applicable
market exclusivity awarded by a particular country. For example, in the United States, if all of the patents that cover our particular biologic product expire
before the 12-year market exclusivity expires, a third party could submit a marketing application for a biosimilar product four years after approval of our
biologic product, and the FDA could immediately review the application and approve the biosimilar product for marketing 12 years after approval of our
biologic. Alternatively, a third party could submit a BLA for a similar or identical product any time after approval of our biologic product, and the FDA
could  immediately  review  and  approve  the  similar  or  identical  product  for  marketing  and  the  third  party  could  begin  marketing  the  similar  or  identical
product upon expiry of all of the patents that cover our particular biologic product.

Additionally,  there  is  a  risk  that  this  exclusivity  could  be  shortened  due  to  congressional  action,  potentially  creating  the  opportunity  for  biosimilar
competition sooner than anticipated. The extent to which a biosimilar, once approved, will be substituted for any one of our reference products in a way
that is similar to traditional generic substitution for non-biological products is not yet clear, and will depend on a number of marketplace and regulatory
factors that are still developing.

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If  we  are  unable  to  protect  the  confidentiality  of  our  proprietary  information  and  know-how,  the  value  of  our  technology  and  products  could  be
adversely affected.

In  addition  to  seeking  patent  protection,  we  also  rely  on  other  proprietary  rights,  including  protection  of  trade  secrets,  know-how  and  confidential  and
proprietary information. To maintain the confidentiality of our trade secrets and proprietary information, we enter into confidentiality agreements with our
employees,  consultants,  collaborators  and  other  third  parties  who  have  access  to  our  trade  secrets.  These  agreements  require  that  all  confidential
information  developed  by  the  individual  or  made  known  to  the  individual  by  us  during  the  course  of  the  individual’s  relationship  with  us  be  kept
confidential and not disclosed to third parties. Our agreements with employees also provide that any inventions conceived by the individual in the course of
rendering services to us shall be our exclusive property. However, we may not obtain these agreements in all circumstances, and individuals with whom we
have  these  agreements  may  not  comply  with  their  terms.  The  assignment  of  intellectual  property  rights  may  not  be  self-executing,  or  the  assignment
agreements may be breached, and we may be forced to bring claims against third parties, or defend claims that they may bring against us, to determine the
ownership  of  what  we  regard  as  our  intellectual  property.  In  addition,  in  the  event  of  unauthorized  use  or  disclosure  of  our  trade  secrets  or  proprietary
information, these agreements, even if obtained, may not provide meaningful protection, particularly for our trade secrets or other confidential information.

Adequate remedies may not exist in the event of unauthorized use or disclosure of our confidential information. Enforcing a claim that a party illegally
disclosed or misappropriated a trade secret is difficult, expensive, and time consuming, and the outcome is unpredictable. In addition, some courts are less
willing or unwilling to protect trade secrets. The disclosure of our trade secrets or the independent development of our trade secrets by a competitor or other
third party would impair our competitive position and may materially harm our business, financial condition, results of operations and prospects.

Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain
and could harm our business.

Our commercial success depends on our ability and the ability of our current or future licensees or collaborators to develop, manufacture, market and sell
our product candidates, and to use our related proprietary technologies without infringing, misappropriating or otherwise violating the intellectual property
and proprietary rights of third parties. The biotechnology and pharmaceutical industries are characterized by extensive litigation regarding patents and other
intellectual property rights. We may become party to, or threatened with, adversarial proceedings or litigation regarding intellectual property rights with
respect to our current and future product candidates. For example, we are aware of third-party patents or patent applications that may be construed to cover
the  targets  of  JTX-8064,  vopratelimab,  JTX-4014  or  JTX-1811.  If  we  are  found  to  infringe  a  third-party’s  intellectual  property  rights,  and  we  are
unsuccessful in demonstrating that such intellectual property rights are invalid or unenforceable, we could be required to obtain a license from such third
party to continue developing, manufacturing and commercializing our product candidates. 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 and other third
parties access to the same technologies licensed to us, and it could require us to make substantial licensing and royalty payments. We also could be forced,
including  by  court  order,  to  cease  developing,  manufacturing,  and  commercializing  our  product  candidates.  In  addition,  in  any  such  proceeding  or
litigation,  we  could  be  found  liable  for  significant  monetary  damages,  including  treble  damages  and  attorneys’  fees,  if  we  are  found  to  have  willfully
infringed a patent or other intellectual property right. Any of the foregoing could have a material adverse effect on our business, financial condition, results
of operations and prospects.

Furthermore, we are testing JTX-8064, vopratelimab and JTX-4014 and expect to test our future product candidates with other products that are covered by
patents held by other companies or institutions. In the event that a labeling instruction is required in product packaging recommending that combination,
we  could  be  accused  of,  or  held  liable  for,  infringement  of  the  third-party  patents  covering  the  product  candidate  or  product  recommended  for
administration  with  our  product  candidates.  In  such  a  case,  we  could  be  required  to  obtain  a  license  from  the  other  company  or  institution  to  use  the
required or desired package labeling, which may not be available on commercially reasonable terms, or at all.

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If we breach any of our license agreements or collaboration agreements, it could have a material adverse effect on our commercialization efforts for
our product candidates.

Our  commercial  success  depends  on  our  ability,  and  at  times,  the  ability  of  our  licensors  and  current  or  future  licensees  and  collaborators  to  develop,
manufacture, market, and sell our product candidates, and use our licensors’ proprietary technologies without infringing the property rights of third parties.
For example, we have entered into an exclusive license agreement with Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer
Center and Memorial Hospital for Cancer and The University of Texas MD Anderson Cancer Center related to certain uses of our vopratelimab, and we
may enter into additional licenses in the future. These and other licenses may not provide exclusive rights to use such intellectual property and technology
in all relevant fields of use and in all territories in which we may wish to develop or commercialize our products in the future. As a result, we may not be
able to prevent competitors from developing and commercializing competitive products in territories included in all our licenses.

In  addition,  we  may  not  have  the  right  to  control  the  preparation,  filing,  prosecution,  maintenance,  enforcement  and  defense  of  patents  and  patent
applications covering the technology that we license to or from third parties. For example, under the Gilead License Agreement, Gilead has the first right to
enforce,  maintain  or  defend  our  intellectual  property  rights  with  respect  to  JTX-1811.  In  such  cases,  we  cannot  be  certain  that  these  patents  and  patent
applications will be prepared, filed, prosecuted, maintained, enforced, and defended in a manner consistent with the best interests of our business. If Gilead
or any other of our licensors or licensees fail to prosecute, maintain, enforce and defend such patents, or lose rights to those patents or patent applications,
the rights we have licensed may be reduced or eliminated and our right to develop and commercialize our product candidates that are the subject of such
licensed rights could be adversely affected. Furthermore, our owned and in-licensed patents may be subject to a reservation of rights by one or more third
parties.

Certain  of  our  license  agreements  also  require  us  to  meet  development  thresholds  to  maintain  the  license,  including  establishing  a  set  timeline  for
developing and commercializing products. If we fail to comply with the obligations under our license agreements, including payment and diligence terms,
our licensors may have the right to terminate our agreements. Such an occurrence could materially adversely affect the value of the product candidate being
developed under any such agreement. Termination of our license agreements or reduction or elimination of our rights under them may result in our having
to negotiate a new or reinstated agreement, which may not be available to us on equally favorable terms, or at all.

If disputes over intellectual property that we have licensed prevent or impair our ability to maintain our current licensing arrangements on commercially
acceptable terms, we may be unable to successfully develop and commercialize the affected product candidates, which could have a material adverse effect
on our business, financial conditions, results of operations and prospects.

Further, the resolution of any contract interpretation disagreement that may arise could narrow what we believe to be the scope of our rights to the relevant
intellectual property or technology, or increase what we believe to be our financial or other obligations under the relevant agreement, either of which could
have a material adverse effect on our business, financial condition, results of operations and prospects.

We may not be successful in obtaining necessary rights to our product candidates we may develop or obtain through acquisitions and in-licenses.

We  currently  have  rights  to  intellectual  property,  through  licenses  from  third  parties,  for  certain  uses  of  vopratelimab.  Because  our  current  and  future
product candidates may require the use of proprietary rights held by third parties, the growth of our business likely will depend, in part, on our ability to
acquire,  in-license  or  use  these  proprietary  rights.  We  may  be  unable  to  acquire  or  in-license  any  compositions,  methods  of  use,  processes  or  other
intellectual property rights from third parties that we identify as necessary for our current and future product candidates. The licensing or acquisition of
third-party intellectual property rights is a competitive area, and several more established companies may pursue strategies to license or acquire third-party
intellectual  property  rights  that  we  may  consider  attractive.  These  established  companies  may  have  a  competitive  advantage  over  us  due  to  their  size,
capital resources and greater clinical development and commercialization capabilities.

If we are unable to successfully obtain required third-party intellectual property rights or maintain the existing intellectual property rights we have, we may
have to abandon or alter our plans for the development or commercialization of the relevant program or product candidate, which could have a material
adverse effect on our business, financial condition, results of operations and prospects.

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

The  USPTO  and  various  foreign  governmental  patent  agencies  require  compliance  with  a  number  of  procedural,  documentary,  fee  payments  and  other
similar provisions during the patent application process and to maintain patents after they are issued. In certain circumstances, we rely on our licensing
partners to take the necessary action to comply with these requirements with respect to our licensed intellectual property. While an unintentional lapse can
be cured by payment of a late fee or by other means in accordance with the applicable rules, there are situations in which noncompliance can result in
abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. If we fail to obtain
and maintain the patents and patent applications covering our products or procedures, we may not be able to stop a competitor from marketing products that
are the same as or similar to our current and future product candidates, which would have a material adverse effect on our business.

Changes to the patent law in the United States and other jurisdictions could diminish the value of patents in general, thereby impairing our ability to
protect our product candidates.

As  is  the  case  with  other  biopharmaceutical  companies,  our  success  is  heavily  dependent  on  intellectual  property,  particularly  patents.  Obtaining  and
enforcing  patents  in  the  biopharmaceutical  industry  involves  both  technological  and  legal  complexity  and  is  therefore  costly,  time  consuming  and
inherently uncertain. Changes in either the patent laws or interpretation of the patent laws in the United States could increase the uncertainties and costs.

The U.S. Supreme Court has ruled on several patent cases in recent years, either narrowing the scope of patent protection available in certain circumstances
or  weakening  the  rights  of  patent  owners  in  certain  situations.  Depending  on  future  actions  by  the  U.S.  Congress,  the  U.S.  courts,  the  USPTO  and  the
relevant  law-making  bodies  in  other  countries,  the  laws  and  regulations  governing  patents  could  change  in  unpredictable  ways  that  would  weaken  our
ability to obtain new patents or to enforce our existing patents and patents that we might obtain in the future. Changes in patent law could increase the
uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could have
a material adverse effect on our business, financial condition, results of operations and prospects.

We may become involved in lawsuits to protect or enforce our intellectual property, which could be expensive, time-consuming and unsuccessful and
have a material adverse effect on the success of our business.

Competitors may infringe our licensed patents or any patent we own in the future or misappropriate or otherwise violate our intellectual property rights. We
may  also  be  required  to  defend  against  claims  of  infringement  and  our  licensed  patents  and  any  patents  we  own  in  the  future  may  become  involved  in
priority or other intellectual property related disputes. To counter infringement or unauthorized use, litigation may be necessary to enforce or defend our
intellectual  property  rights  or  to  determine  the  validity  and  scope  of  our  own  intellectual  property  rights  or  the  proprietary  rights  of  others.  Also,  third
parties may initiate legal proceedings against us or our licensors to assert that we are infringing their intellectual property rights or to challenge the validity
or scope of our owned or licensed intellectual property rights. Litigation and other intellectual property related proceedings could result in substantial costs
and diversion of management resources, which could harm our business and financial results. Despite our best efforts, we may not be able to prevent third
parties  from  infringing  upon  or  misappropriating  our  intellectual  property.  In  addition,  an  adverse  result  in  any  litigation  or  other  intellectual  property
related proceeding could put one or more of our patents at risk of being invalidated, held unenforceable or interpreted narrowly.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our
confidential information could be disclosed during this type of litigation. There could also be public announcements of the results of hearings, motions or
other interim proceedings or developments in any such proceedings. If securities analysts or investors perceive these results to be negative, it also could
have  a  material  adverse  effect  on  the  price  of  shares  of  our  common  stock.  Any  of  the  foregoing  may  have  a  material  adverse  effect  on  our  business,
financial condition, results of operations and prospects.

We  may  be  subject  to  claims  by  third  parties  asserting  that  our  collaborators,  licensors,  employees  or  we  have  misappropriated  their  intellectual
property,  have  wrongfully  used  or  disclosed  confidential  information  of  third  parties  or  are  in  breach  of  non-competition  or  non-solicitation
agreements with our competitors.

Many of our employees, our collaborators’ employees and our licensors’ employees, including our senior management, are currently or previously were
employed  at  universities  or  other  biotechnology  or  pharmaceutical  companies,  including  our  competitors  or  potential  competitors.  Some  of  these
employees,  including  each  member  of  our  senior  management,  executed  proprietary  rights,  non-disclosure  and  non-competition  agreements,  or  similar
agreements, in connection with such previous employment. Although we try to ensure that our employees do not use the proprietary information or know-
how of others in their work for us, we may be subject to claims that we or these employees have used or disclosed intellectual property of any

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such individual’s current or former employer. In addition, we could be subject to claims that we or our employees have inadvertently or otherwise used or
disclosed alleged trade secrets or other confidential information of former employers or competitors, that we caused an employee to breach the terms of his
or her non-competition or non-solicitation agreement, or that we or these individuals have, inadvertently or otherwise, used or disclosed the alleged trade
secrets  or  other  proprietary  information  of  a  former  employer  or  competitor.  Litigation  may  be  necessary  to  defend  against  such  claims.  If  we  fail  in
defending  any  such  claims,  we  may  lose  valuable  intellectual  property  rights  or  personnel  or  sustain  monetary  damages.  Even  if  we  are  successful  in
defending against such claims, litigation could result in substantial costs and be a distraction to management. Any of the foregoing may have a material
adverse effect on our business, financial condition, results of operations and prospects.

Issued patents covering our current and future product candidates could be found invalid or unenforceable if challenged in court or before the USPTO
or comparable foreign authority.

If  we  or  one  of  our  licensing  partners  initiate  legal  proceedings  against  a  third  party  to  enforce  a  patent  covering  one  of  our  current  or  future  product
candidates,  the  defendant  could  counterclaim  that  the  patent  covering  our  product  candidate  is  invalid  or  unenforceable.  The  outcome  following  legal
assertions of invalidity and unenforceability is unpredictable. If a third party were to prevail on a legal assertion of invalidity and/or unenforceability, we
would lose at least part, and perhaps all, of the patent protection on our current and future product candidates. Such a loss of patent protection could have a
material adverse impact on our business.

Risks Related to Employee Matters, Managing our Growth and Other Risks Related to our Business

We are highly dependent on our key personnel, and if we are not successful in attracting, motivating and retaining highly qualified personnel, we may
not be able to successfully implement our business strategy.

Our  ability  to  compete  in  the  highly  competitive  biotechnology  and  pharmaceutical  industries  depends  upon  our  ability  to  attract,  motivate  and  retain
highly  qualified  managerial,  scientific  and  medical  personnel.  We  are  highly  dependent  on  our  management,  particularly  our  chief  executive  officer,
Richard  Murray,  and  our  scientific  and  medical  personnel.  The  loss  of  the  services  of  any  of  our  executive  officers,  key  employees,  and  scientific  and
medical advisors, and our inability to find suitable replacements, could result in delays in product development and harm our business.

Our  Cambridge,  Massachusetts  headquarters  is  located  in  a  region  that  is  home  to  many  other  biopharmaceutical  companies  and  many  academic  and
research institutions. Competition for skilled personnel is intense and the turnover rate can be high, which may limit our ability to hire and retain highly
qualified personnel on acceptable terms or at all. We expect that we will need to recruit talent from outside of our region and doing so may be costly and
difficult.

To induce valuable employees to remain at our Company, in addition to salary and cash incentives, we have provided equity awards that vest over time.
The value to employees of these equity grants that vest over time may be 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. Although we have employment agreements with our key
employees, these employment agreements provide for at-will employment, meaning that such employees could leave our employment at any time, with or
without notice. We do not maintain “key man” insurance policies on the lives of all of these individuals or the lives of any of our other employees.

We currently have no marketing and sales organization and have no experience in marketing products. If we are unable to establish marketing and
sales capabilities or enter into agreements with third parties to market and sell our product candidates, we may not be able to generate product revenue.

We currently have no sales, marketing, or distribution capabilities and have no experience in marketing products. If any of our product candidates receives
appropriate  regulatory  approval,  we  intend  to  develop  an  in-house  marketing  organization  and  sales  force,  which  will  require  significant  capital
expenditures, management resources and time. We will have to compete with other pharmaceutical and biotechnology companies to recruit, hire, train and
retain marketing and sales personnel.

If we are unable or decide not to establish internal sales, marketing and distribution capabilities, we will pursue collaborative arrangements regarding the
sales and marketing of our products; however, we cannot assure stockholders that we will be able to establish or maintain such collaborative arrangements,
on  favorable  terms  if  at  all.  We  cannot  assure  stockholders  that  we  will  be  able  to  develop  in-house  sales  and  distribution  capabilities  or  establish  or
maintain relationships with third-party collaborators to commercialize any current or future product candidates.

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

We are exposed to the risk that our employees, independent contractors, vendors, principal investigators, CROs and consultants may engage in fraudulent
conduct  or  other  illegal  activity.  Misconduct  by  these  parties  could  include  intentional,  reckless  and/or  negligent  conduct  or  disclosure  of  unauthorized
activities to us that violate the regulations of the FDA and comparable foreign regulatory authorities, including those laws requiring the reporting of true,
complete and accurate information to such authorities; healthcare fraud and abuse laws and regulations in the United States and abroad; anti-corruption and
anti-bribery laws, including the Foreign Corrupt Practices Act, and various other anti-corruption laws in countries outside of the United States; or laws that
require the reporting of financial information or data accurately. 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. We have adopted a
code of conduct applicable to all of our employees, but it is not always possible to identify and deter 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 comply with these laws or regulations. Additionally, we are subject to the risk that a person could
allege such fraud or other misconduct, even if none occurred. If any such actions are instituted against us, and we are not successful in defending ourselves
or asserting our rights, those actions could result in significant penalties and could have a material adverse effect on our ability to operate our business and
our results of operations.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could
have a material adverse effect on the success of our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the handling, use,
storage,  treatment  and  disposal  of  hazardous  materials  and  wastes.  Our  operations  involve  the  use  of  hazardous  and  flammable  materials,  including
chemicals and biological and radioactive materials. Our operations also produce hazardous waste products. We generally contract with third parties for the
disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury
resulting from our use of hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also
could incur significant costs associated with civil or criminal fines and penalties.

Although we maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from
the  use  of  hazardous  materials,  this  insurance  may  not  provide  adequate  coverage  against  potential  liabilities.  We  do  not  maintain  insurance  for
environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive
materials.

If we engage in future acquisitions or strategic partnerships, this may increase our capital requirements, dilute our stockholders, cause us to incur debt
or assume contingent liabilities, and subject us to other risks.

We may evaluate various acquisitions and additional strategic partnerships, including licensing or acquiring complementary products, intellectual property
rights, technologies, or businesses. Any potential acquisition or strategic partnership may entail numerous risks, including:

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increased operating expenses and cash requirements;

the assumption of additional indebtedness or contingent liabilities;

the issuance of our equity securities;

assimilation  of  operations,  intellectual  property  and  products  of  an  acquired  company,  including  difficulties  associated  with  integrating  new
personnel;

the diversion of our management’s attention from our existing product programs and initiatives in pursuing such a strategic merger or acquisition;

retention of key employees, the loss of key personnel, and uncertainties in our ability to maintain key business relationships;

risks and uncertainties associated with the other party to such a transaction, including the prospects of that party and their existing products or
product candidates and marketing approvals; and

our inability to generate revenue from acquired technology and/or products sufficient to meet our objectives in undertaking the acquisition or even
to offset the associated acquisition and maintenance costs.

In  addition,  if  we  undertake  acquisitions,  we  may  issue  dilutive  securities,  assume  or  incur  debt  obligations,  incur  large  one-time  expenses  and  acquire
intangible assets that could result in significant future amortization expense. Moreover, we may not

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be able to locate suitable acquisition opportunities and this inability could impair our ability to grow or obtain access to technology or products that may be
important to the development of our business.

Our internal information technology systems, or those used by our CROs or other third parties, may fail or suffer security breaches and cyber-attacks,
which could compromise our intellectual property or other sensitive information, could result in a material disruption of our business or could subject
us to regulatory actions that could result in significant fines.

We, our CROs and other third parties rely significantly upon information technology systems, and despite the implementation of security measures, our
internal information technology systems are vulnerable to damage from computer viruses and unauthorized access. While we have not to our knowledge
experienced  any  such  material  system  failure  or  security  breach  to  date,  if  such  an  event  were  to  occur,  it  could  result  in  a  material  disruption  of  our
business  operations.  We,  our  CROs,  contractors  and  other  third  parties  rely  on  information  technology  networks  and  systems  to  process,  personal
identifying  information  and  payroll  data,  including  operational  and  financial  transactions  and  records.  In  particular,  we  rely  on  third  parties  for  many
aspects of our business, including manufacturing product candidates and conducting clinical trials. The secure maintenance of this information is critical to
our  business  and  reputation.  We  believe  that  companies  have  been  increasingly  subject  to  a  wide  variety  of  security  incidents,  cyber-attacks  and  other
attempts  to  gain  unauthorized  access.  These  threats  can  come  from  a  variety  of  sources,  ranging  in  sophistication  from  an  individual  hacker  to  a  state-
sponsored attack. Cyber threats may be generic, or they may be custom-crafted against our information systems. Over the past few years, cyber-attacks
have become more prevalent and much harder to detect and defend against. Additionally, our increased reliance on personnel working from home 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 or delay necessary interactions with regulators, CROs, clinical trial sites or third-party manufacturing and supply
partners.

Our  network  and  storage  applications  and  those  of  CROs  and  other  third  parties  may  be  subject  to  unauthorized  access  by  hackers  or  breached  due  to
operator error, malfeasance or other system disruptions. It is often difficult to anticipate or immediately detect such incidents and the damage caused by
them. These data breaches and any unauthorized access or disclosure of our information or intellectual property could compromise our intellectual property
and  expose  sensitive  business  information.  A  security  breach,  cyber-attack  or  unauthorized  access  of  our  clinical  data  or  other  data  could  damage  the
integrity  of  our  clinical  trials,  impact  our  regulatory  filings,  cause  significant  risk  to  our  business,  compromise  our  ability  to  protect  our  intellectual
property,  and  subject  us  to  regulatory  actions,  including  under  privacy  or  security  rules  under  federal,  state  or  other  international  laws  protecting
confidential  information,  that  could  be  expensive  to  defend  and  could  result  in  significant  fines  or  other  penalties.  Although  we  maintain  a  cyber  risk
management insurance policy, cyber-attacks could cause us to incur significant remediation costs, disrupt key business operations and divert attention of
management and key information technology resources. Our network security and data recovery measures and those of our CROs, licensees, collaborators,
contractors and vendors may not be adequate to protect against such security breaches and disruptions.

We, or the third parties upon whom we depend, may be adversely affected by unforeseen or catastrophic events, including the emergence of a pandemic
or other natural disasters, and our business continuity and disaster recovery plans may not adequately protect us from a serious disaster.

The COVID-19 pandemic has had adverse effects on our business, including difficulty sourcing the components of sample collection kits for our clinical
trials,  and  may  have  further  adverse  effects,  the  extent  or  nature  of  which  we  are  not  able  to  predict  at  this  time.  In  addition,  other  unforeseen  or
catastrophic events could severely disrupt our operations and our supply chain, and have a material adverse effect on our business. If a natural disaster,
power  outage  or  other  event  occurred  that  damaged  critical  infrastructure,  such  as  our  headquarters  or  the  manufacturing  facilities  of  our  third-party
contract  manufacturers,  or  that  otherwise  disrupted  operations,  it  may  be  difficult  or,  in  certain  cases,  impossible  for  us  to  continue  our  business  for  a
substantial period of time. The disaster recovery and business continuity plans we have in place may prove inadequate in the event of a serious disaster or
similar event. We may incur substantial expenses as a result of the limited nature of our disaster recovery and business continuity plans, which, could have
a material adverse effect on our business.

Unstable market and economic conditions may have serious adverse consequences on our business, financial condition and stock price.

Our  general  business  strategy  may  be  adversely  affected  by  any  economic  downturn,  volatile  business  environment  or  unpredictable  and  unstable
conditions  in  global  credit  and  financial  markets.  We  cannot  assure  stockholders  that  deterioration  of  the  global  credit  and  financial  markets  would  not
negatively impact our stock price, our current portfolio of cash equivalents or investments, or our ability to meet our financing objectives. Foreign currency
fluctuations could result in increased operating expenses and other obligations incident to doing business in another country. If the current equity and credit
markets deteriorate, it may make any necessary debt or equity financing more difficult, more costly, and more dilutive. Failure to secure any necessary
financing in a timely manner and on favorable terms could have a material adverse effect on our growth strategy, financial performance and stock price and
could require us to delay or abandon clinical development plans.

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Risks Related to our Common Stock

The  price  of  our  common  stock  may  be  volatile  and  fluctuate  substantially,  which  could  result  in  substantial  losses  for  purchasers  of  our  common
stock.

Our stock price is likely to be volatile. The stock market in general and the market for biopharmaceutical companies in particular have experienced extreme
volatility that has often been unrelated to the operating performance of particular companies. As a result, we may face difficulties raising capital through
sales  of  our  common  stock  or  such  sales  may  be  on  unfavorable  terms.  The  market  price  for  our  common  stock  may  be  influenced  by  many  factors,
including:

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the success of competitive products or technologies;

results of our clinical trials or those of our competitors;

regulatory or legal developments in the United States and other countries;

developments or disputes concerning patent applications, issued patents or other proprietary rights;

the recruitment or departure of key personnel;

the level of expenses related to our product candidates or clinical development programs;

the results of our efforts to discover, develop, acquire or in-license additional product candidates or drugs;

actual or anticipated changes in estimates as to financial results, development timelines or recommendations by securities analysts;

variations in our financial results or those of companies that are perceived to be similar to us;

changes in the structure of healthcare payment systems;

market conditions in the pharmaceutical and biotechnology sectors;

general economic, industry and market conditions; and

the other factors described in this “Risk Factors” section.

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

Our executive officers, directors, principal stockholders and their affiliates will continue to exercise control over our company, which will limit your
ability to influence corporate matters and could delay or prevent a change in corporate control.

As  of  December  31,  2020,  our  executive  officers  and  directors,  combined  with  our  stockholders  who  owned  more  than  five  percent  of  our  outstanding
common stock, and their affiliates, beneficially owned approximately 55 percent of our outstanding common stock. As a result, these stockholders, if they
act together, could be able to control the outcome of matters submitted to our stockholders for approval, including the election of directors and any sale,
merger, consolidation, or sale of all or substantially all of our assets. In addition, this concentration of ownership might adversely affect the market price of
our common stock by:

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delaying, deferring or preventing a change of control;

impeding a merger, consolidation, takeover or other business combination; or

discouraging a potential acquiror from making a tender offer or otherwise attempting to obtain control.

Our ability to utilize our net operating loss carryforwards and certain other tax attributes has been limited by “ownership changes” and may be further
limited.

Under Section 382 of the Internal Revenue Code of 1986, as amended, or the IRC, if a corporation undergoes an “ownership change” (generally defined as
a  greater  than  50  percent  change  (by  value)  in  the  ownership  of  its  equity  over  a  three-year  period),  the  corporation’s  ability  to  use  its  pre-change  net
operating loss, or NOL, carryforwards and certain other pre-change tax attributes to offset its post-change income may be limited. An IRC Section 382
study, completed in August 2016, identified three previous ownership changes for purposes of IRC Section 382. No additional ownership changes were
identified in a study completed in May 2020. As a result of these ownership changes, our net operating loss and tax credit carryforwards allocable to

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the periods preceding each such ownership change are subject to limitations under IRC Section 382. We may experience ownership changes in the future as
a result subsequent shifts in our stock ownership, some of which are outside our control, which may also be subject to limitations by “ownership changes”
in the future, which could result in increased tax liability to us.

There is also a risk that due to regulatory changes, such as suspensions on the use of NOLs, or other unforeseen reasons, our existing NOLs could expire or
otherwise  become  unavailable  to  offset  future  income  tax  liabilities.  As  described  below  in  “Changes  in  tax  laws  or  in  their  implementation  or
interpretation may adversely affect our business and financial condition,” the Tax Act, as amended by the Coronavirus Aid, Relief, and Economic Security
Act, or CARES Act, includes changes to U.S. federal tax rates and the rules governing NOL carryforwards that may significantly impact our ability to
utilize our NOLs to offset taxable income in the future. In addition, state NOLs generated in one state cannot be used to offset income generated in another
state. For these reasons, even if we attain profitability, we may be unable to use a material portion of our NOLs and other tax attributes.

Changes in tax laws or in their implementation or interpretation may adversely affect our business and financial condition.

Changes  in  tax  law  may  adversely  affect  our  business  or  financial  condition.  On  December  22,  2017,  the  U.S.  government  enacted  the  Tax  Act,  which
significantly  reformed  the  IRC.  The  Tax  Act,  among  other  things,  contained  significant  changes  to  corporate  taxation,  including  a  reduction  of  the
corporate tax rate from a top marginal rate of 35% to a flat rate of 21%, the limitation of the tax deduction for net interest expense to 30% of adjusted
taxable income (except for certain small businesses), the limitation of the deduction for NOLs arising in taxable years beginning after December 31, 2017
to 80% of current year taxable income and elimination of net operating loss carrybacks for losses arising in taxable years ending after December 31, 2017
(though  any  such  NOLs  may  be  carried  forward  indefinitely),  the  imposition  of  a  one-time  taxation  of  offshore  earnings  at  reduced  rates  regardless  of
whether  they  are  repatriated,  the  elimination  of  U.S.  tax  on  foreign  earnings  (subject  to  certain  important  exceptions),  the  allowance  of  immediate
deductions  for  certain  new  investments  instead  of  deductions  for  depreciation  expense  over  time,  and  the  modification  or  repeal  of  many  business
deductions and credits.

As part of Congress’s response to the COVID-19 pandemic, the Families First Coronavirus Response Act, or FFCR Act, was enacted on March 18, 2020,
and the CARES Act was enacted on March 27, 2020. Both contain numerous tax provisions. In particular, the CARES Act retroactively and temporarily
(for taxable years beginning before January 1, 2021) suspends application of the 80%-of-income limitation on the use of NOLs, which was enacted as part
of the Tax Act. It also provides that NOLs arising in any taxable year beginning after December 31, 2017, and before January 1, 2021 are generally eligible
to  be  carried  back  up  to  five  years.  The  CARES  Act  also  temporarily  (for  taxable  years  beginning  in  2019  or  2020)  relaxes  the  limitation  of  the  tax
deductibility for net interest expense by increasing the limitation from 30% to 50% of adjusted taxable income.

Regulatory  guidance  under  the  Tax  Act,  the  FFCR  Act  and  the  CARES  Act  is  and  continues  to  be  forthcoming,  and  such  guidance  could  ultimately
increase or lessen impact of these laws on our business and financial condition. Congress is also considering and may enact further tax law changes in
connection  with  the  COVID-19  pandemic,  some  of  which  could  have  an  impact  on  our  company.  In  addition,  state  tax  legislation  or  administrative
guidance conforming to or decoupling from particular provisions of the Tax Act, the FFCR Act and the CARES Act could affect our business or financial
condition.

We are incurring and will continue to incur significantly increased costs as a result of operating as a public company, and our management is required
to devote substantial time to compliance initiatives.

As a public company, we are incurring and will continue to incur significant legal, accounting and other expenses, particularly after we are no longer an
emerging growth company. We are subject to the reporting requirements of the Exchange Act, as well as various requirements imposed by the Sarbanes-
Oxley  Act,  rules  subsequently  adopted  by  the  SEC  and  Nasdaq  to  implement  provisions  of  the  Sarbanes-Oxley  Act,  and  the  Dodd-Frank  Wall  Street
Reform and Consumer Protection Act. Stockholder activism, the current political environment and the current high level of government intervention and
regulatory  reform  may  lead  to  substantial  new  regulations  and  disclosure  obligations,  which  may  lead  to  additional  compliance  costs  and  impact  the
manner in which we operate our business in ways we cannot currently anticipate.

Our management and other personnel will need to continue to devote a substantial amount of time to these compliance initiatives. Moreover, these rules
and regulations will increase our legal and financial compliance costs and make some activities more time-consuming and costly. For example, we expect
these rules and regulations to make it more difficult and more expensive for us to obtain director and officer liability insurance, and we may be required to
incur substantial costs to maintain the same or similar coverage. We cannot predict or estimate the amount or timing of additional costs we may incur to
respond to these requirements. The impact of these requirements 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.

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

Certain  stockholders  hold  a  substantial  number  of  shares  of  our  common  stock.  If  such  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,  shares  of  common  stock  that  are  either  subject  to  outstanding  options  or  reserved  for  future  issuance  under  our  stock  incentive  plans  will
become  eligible  for  sale  in  the  public  market  extent  permitted  by  the  provisions  of  various  vesting  schedules  and  Rule  144  and  Rule  701  under  the
Securities Act of 1933, as amended, or the Securities Act, and, in any event, we have filed a registration statement permitting shares of common stock
issued on exercise of options to be freely sold in the public market. 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.

Certain holders of our common stock are entitled to rights with respect to the registration of their shares under the Securities Act. Registration of these
shares under the Securities Act would result in the shares becoming freely tradable without restriction under the Securities Act, except for shares held by
affiliates. Any sales of securities by these stockholders who have exercised registration rights could have a material adverse effect on the trading price of
our common stock.

Our operating results may fluctuate significantly, which makes our future operating results difficult to predict and could cause our operating results to
fall below expectations or our guidance.

Our quarterly and annual operating results may fluctuate significantly, which makes it difficult for us to predict our future operating results. From time to
time, we may enter into license or collaboration agreements with other companies that include development funding and significant upfront and milestone
payments and/or royalties, which may become an important source of our revenue. Accordingly, our revenue may depend on development funding and the
achievement of development and clinical milestones under current and any potential future license and collaboration agreements and sales of our products,
if  approved.  These  upfront  and  milestone  payments  may  vary  significantly  from  period  to  period  and  any  such  variance  could  cause  a  significant
fluctuation in our operating results from one period to the next.

Furthermore, our operating results may fluctuate due to a variety of other factors, many of which are outside of our control and may be difficult to predict,
including the following:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the timing and cost of, and level of investment in, research and development activities relating to our current and future product candidates, which
will change from time to time;

our ability to enroll patients in clinical trials and the timing of enrollment;

the cost of manufacturing our current and future product candidates, which may vary depending on FDA guidelines and requirements, the quantity
of production and the terms of our agreements with manufacturers;

expenditures that we will or may incur to acquire or develop additional product candidates and technologies;

the timing and outcomes of clinical trials for our current product candidates or competing product candidates;

competition from existing and future products that may compete with our current and future product candidates, and changes in the competitive
landscape of our industry, including consolidation among our competitors or partners;

any delays in regulatory review or approval of any of our current or future product candidates;

the level of demand for our current and future product candidates, if approved, which may fluctuate significantly and be difficult to predict;

our ability to commercialize our current and future product candidates, if approved;

the success of our exclusive license to Gilead and our ability to establish and maintain other collaborations, licensing or other arrangements;

our ability to adequately support future growth;

potential unforeseen business disruptions that increase our costs or expenses;

future accounting pronouncements or changes in our accounting policies;

the impact of the COVID-19 pandemic, including precautions to mitigate the spread of COVID-19; and

the changing and volatile global economic environment.

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The  cumulative  effect  of  these  factors  could  result  in  large  fluctuations  and  unpredictability  in  our  quarterly  and  annual  operating  results.  As  a  result,
comparing our operating results on a period-to-period basis may not be meaningful. Investors should not rely on our past results as an indication of our
future performance. If our revenue or operating results fall below the expectations of analysts or investors or below any forecasts we may provide to the
market,  or  if  the  forecasts  we  provide  to  the  market  are  below  the  expectations  of  analysts  or  investors,  the  price  of  our  common  stock  could  decline
substantially.  Such  a  stock  price  decline  could  occur  even  when  we  have  met  any  previously  publicly  stated  revenue  and/or  earnings  guidance  we  may
provide.

Moreover, 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 as pharmaceutical 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.

If securities analysts do not publish research or reports about our business or if they publish negative evaluations of our stock, the price of our stock
could decline.

The trading market for our common stock will rely, in part, on the research and reports that industry or financial analysts publish about us or our business.
If one or more of the analysts covering our business downgrade their evaluations of our stock, the price of our stock could decline. If one or more of these
analysts cease to cover our stock, we could lose visibility in the market for our stock, which, in turn, could cause our stock price to decline.

Anti-takeover  provisions  in  our  charter  documents  and  under  Delaware  law  could  make  an  acquisition  of  us,  which  may  be  beneficial  to  our
stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management.

Provisions in our amended and restated certificate of incorporation and amended and restated bylaws may delay or prevent an acquisition of us or a change
in our management. These provisions include a classified board of directors, a prohibition on actions by written consent of our stockholders and the ability
of our board of directors to issue preferred stock without stockholder approval. In addition, because we are incorporated in Delaware, we are governed by
the provisions of Section 203 of the Delaware General Corporation Law, which limits the ability of stockholders owning in excess of 15 percent of our
outstanding voting stock to merge or combine with us. Although we believe these provisions collectively provide for an opportunity to obtain greater value
for stockholders by requiring potential acquirors to negotiate with our board of directors, they would apply even if an offer rejected by our board were
considered beneficial by some stockholders. In addition, 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.

Our bylaws designate the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of actions and proceedings that
may  be  initiated  by  our  stockholders,  which  could  limit  our  stockholders’  ability  to  obtain  a  favorable  judicial  forum  for  disputes  with  us  or  our
directors, officers or employees.

Our  bylaws,  provide  that,  unless  we  consent  in  writing  to  an  alternative  forum,  the  Court  of  Chancery  of  the  State  of  Delaware  will  be  the  sole  and
exclusive forum for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim of breach of a fiduciary duty owed by
any of our directors, officers and employees to us or our stockholders, (iii) any action asserting a claim arising pursuant to any provision of the Delaware
General Corporation Law, our certificate of incorporation or our bylaws, or (iv) any action asserting a claim that is governed by the internal affairs doctrine,
in  each  case  subject  to  the  Court  of  Chancery  having  personal  jurisdiction  over  the  indispensable  parties  named  as  defendants  therein.  Any  person
purchasing or otherwise acquiring any interest in any shares of our capital stock shall be deemed to have notice of and to have consented to this provision
of our bylaws.

This exclusive forum provision would not apply to suits brought to enforce a duty or liability created by the Securities Exchange Act of 1934, as amended,
which provides for exclusive jurisdiction of the federal courts. It could apply, however, to a suit that falls within one or more of the categories enumerated
in the exclusive forum provision and asserts claims under the Securities Act of 1933, as amended, or the Securities Act, inasmuch as Section 22 of the
Securities Act creates concurrent jurisdiction for federal and state courts over all suits brought to enforce any duty or liability created by the Securities Act
or the rules and regulations thereunder, provided, that with respect to claims under the Securities Act, our stockholders will not be deemed to have waived
our compliance with the federal securities laws and the rules and regulations thereunder.

This  choice  of  forum  provision  may  limit  a  stockholder’s  ability  to  bring  a  claim  in  a  judicial  forum  that  it  finds  favorable  for  disputes  with  us  or  our
directors,  officers  or  employees,  which  may  discourage  such  lawsuits  against  us  and  our  directors,  officers  and  employees  even  though  an  action,  if
successful, might benefit our stockholders. Stockholders who do bring a claim

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in the Court of Chancery could face additional litigation costs in pursuing any such claim, particularly if they do not reside in or near the State of Delaware.
The Court of Chancery may also reach different judgments or results than would other courts, including courts where a stockholder considering an action
may  be  located  or  would  otherwise  choose  to  bring  the  action,  and  such  judgments  or  results  may  be  more  favorable  to  us  than  to  our  stockholders.
Alternatively, if a court were to find this provision of our amended and restated certificate of incorporation inapplicable to, or unenforceable in respect of,
one or more of the specified types of actions or proceedings, we may incur additional costs, which could have a material adverse effect on our business,
financial condition or results of operations.

Item 1B. Unresolved Staff Comments

Not applicable.

Item 2. Properties

We lease a facility containing our research and development, laboratory and office space, which consists of approximately 51,000 square feet located at
780 Memorial Drive, Cambridge, Massachusetts. Our lease expires on March 31, 2025. This facility is our corporate headquarters. We believe that our
facilities are sufficient to meet our current needs.

Item 3. Legal Proceedings

We are not currently a party to any material legal proceedings.

Item 4. Mine Safety Disclosures

Not applicable.

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PART II

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

Market Information and Holders

Our common stock trades on the Nasdaq Global Select Market under the symbol “JNCE”. As of February 19, 2021, we had approximately 17 holders of
record of our common stock. This number does not include beneficial owners whose shares were held by nominees in street name.

Dividend Policy

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all available funds and any future earnings, if any, to fund
the development and expansion of our business and we do not anticipate paying any cash dividends in the foreseeable future. Any future determination to
pay  dividends  will  be  made  at  the  discretion  of  our  board  of  directors  and  will  depend  on  various  factors,  including  applicable  laws,  our  results  of
operations, financial condition, future prospects, then applicable contractual restrictions and any other factors deemed relevant by our board of directors.
Investors should not purchase our common stock with the expectation of receiving cash dividends.

Recent Sales of Unregistered Securities

None.

Purchase of Equity Securities

We did not purchase any of our registered equity securities during the period covered by this Annual Report on Form 10‑K.

Item 6. Selected Financial Data

Not applicable.

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

The  following  discussion  and  analysis  of  our  financial  condition  and  results  of  operations  should  be  read  together  with  our  consolidated  financial
statements and related notes appearing elsewhere in this Annual Report on Form 10-K. In addition to historical information, this discussion and analysis
contains forward-looking statements that involve risks, uncertainties and assumptions. Our actual results may differ materially from those anticipated in
these forward-looking statements as a result of certain factors. We discuss factors that we believe could cause or contribute to these differences below and
elsewhere  in  this  Annual  Report  on  Form  10-K,  including  those  factors  set  forth  in  the  section  entitled  “Cautionary  Note  Regarding  Forward-Looking
Statements and Industry Data” and in the section entitled “Risk Factors” in Part I, Item 1A.

Overview

We are a clinical-stage immunotherapy company dedicated to transforming the treatment of cancer by developing therapies that enable the immune system
to  attack  tumors  and  provide  long-lasting  benefits  to  patients.  Our  strategy  is  to  use  a  biomarker-driven  approach  from  discovery  through  clinical
development.  We  have  developed  a  suite  of  integrated  technologies  that  comprise  our  Translational  Science  Platform,  enabling  us  to  comprehensively
interrogate the cellular and molecular composition of tumors. By focusing on specific cell types, both immune and non-immune, within tumors, we can
prioritize targets and then identify related biomarkers designed to match the right therapy to the right patient. Our pipeline is focused on product candidates
to  address  PD-(L)1-inhibitor  resistant  and  PD-(L)1  inhibitor  sensitive  tumors,  which  represent  significant  opportunities  requiring  different  biological
approaches. We aim to develop product candidates that address the unmet medical need of patients in both of these populations.

Our highest priority program, JTX-8064, is being developed for patients with either PD-(L)1-inhibitor resistant or PD-(L)1 inhibitor sensitive tumors. JTX-
8064  is  the  first  tumor-associated  macrophage  candidate  to  emerge  from  our  Translational  Science  Platform.  JTX-8064  is  an  antibody  that  binds  to
Leukocyte Immunoglobulin Like Receptor B2, or LILRB2 (also known as ILT4), which is a cell surface receptor expressed on macrophages. In January
2021, we began enrollment in the INNATE trial, our Phase 1 dose-escalation clinical trial of JTX-8064 as a monotherapy and in combination with either
our  PD-1  inhibitor,  JTX-4014,  or  pembrolizumab  in  patients  with  advanced  solid  tumors.  Our  goal  is  to  advance  this  program  rapidly,  and,  as  a  result,
INNATE is a proof-of-concept trial that includes indication-specific expansion cohorts.

Vopratelimab is a clinical-stage monoclonal antibody that binds to and activates the Inducible T cell CO-Stimulator, or ICOS, a protein on the surface of
certain  T  cells  commonly  found  in  many  solid  tumors.  We  are  currently  enrolling  patients  in  the  SELECT  trial,  which  is  evaluating  vopratelimab  in
combination with JTX-4014, our anti-PD-1 antibody, compared to JTX-4014 alone in biomarker-selected, immunotherapy-naive second-line non-small cell
lung cancer, or NSCLC, patients. We identify patients for SELECT using TIS
, an 18 gene signature that includes genes relevant to both CD8 and CD4
T cell biology. TIS
  has  been  optimized  to  predict  for  emergence  of  ICOS  hi  CD4  T  cells  in  the  peripheral  blood,  which  have  been  associated  with
clinical benefit in patients treated with vopratelimab alone or in combination with nivolumab. SELECT is a randomized Phase 2 clinical trial outside the
United States, and we dosed the first patient in October 2020. Due to COVID-19-related delays, we now expect to report clinical data from SELECT in
2022.

vopra 

vopra

JTX-4014  is  a  clinical-stage  anti-PD-1  antibody  that  we  are  developing  primarily  for  potential  use  in  combination  with  our  product  candidates,  as  we
believe that combination therapy has the potential to be a mainstay of cancer immunotherapy. We presented safety and preliminary efficacy data from a
Phase  1  clinical  trial  of  JTX-4014  monotherapy  in  2019.  Based  on  the  results  of  that  clinical  trial,  we  are  using  JTX-4014  in  combination  with
vopratelimab in SELECT, and we plan to use JTX-4014 in combination with JTX-8064 in INNATE.

Beyond  our  product  candidates,  we  continue  to  advance  and  build  our  discovery  pipeline.  We  are  discovering  and  developing  next-generation
immunotherapies  by  leveraging  our  Translational  Science  Platform  to  systematically  and  comprehensively  interrogate  cell  types  within  the  tumor
microenvironment.  Our  broad  discovery  pipeline  includes  multiple  programs  targeting  myeloid  cells  such  as  macrophages,  T  regulatory  cells  and  non-
immune cells, such as stromal cells. We believe that the use of our Translational Science Platform to efficiently identify novel immuno-oncology targets
and advance them from discovery to investigational new drug application, or IND, stage is a sustainable approach that we plan to continually apply across
our broad discovery pipeline and target selection process.

In August 2020, we entered into an agreement to exclusively license JTX-1811 to Gilead Sciences, Inc., or Gilead. JTX-1811 is the most recent product
candidate to emerge from our Translational Science Platform, and, is a monoclonal antibody that is designed to selectively deplete T regulatory cells in the
tumor microenvironment, or TME, by targeting a receptor called CCR8, which is preferentially expressed on intra-tumoral T regulatory cells. Pursuant to
our  exclusive  license  agreement  with  Gilead,  or  the  Gilead  License  Agreement,  we  granted  Gilead  a  worldwide  license  to  develop,  manufacture  and
commercialize  JTX-1811  and  certain  derivatives  thereof,  as  well  as  backup  antibodies  defined  within  the  agreement.  Concurrently  with  the  license
agreement, we entered into a stock purchase agreement with Gilead, or the Stock Purchase Agreement, and a registration rights agreement.

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Under  the  terms  of  the  Gilead  License  Agreement  and  Stock  Purchase  Agreement,  Gilead  paid  us  a  one-time,  non-refundable  upfront  payment  of
$85.0  million  and  $35.0  million  to  purchase  5,539,727  shares  of  our  common  stock  pursuant  to  the  Stock  Purchase  Agreement.  Under  the  terms  of  the
Gilead License Agreement, we will advance JTX-1811 until the clearance of an IND application or an earlier date specified by Gilead, at which time the
program will be transitioned to Gilead. We are entitled to receive payments from Gilead upon the achievement of specified clinical, regulatory and sales
milestones,  including  potential  clinical  development  and  regulatory  milestone  payments  up  to  an  aggregate  total  of  $510.0  million  and  potential  sales
milestone payments up to an aggregate total of $175.0 million. We are also eligible to receive tiered royalty payments based on a percentage of annual
worldwide  net  sales  ranging  from  the  high-single  digits  to  mid-teens,  based  on  future  annual  net  sales  of  licensed  products,  on  a  licensed  product-by-
licensed product and country-by-country basis.

On July 22, 2019, we entered into an exclusive license agreement with Celgene, or the Celgene License Agreement, granting Celgene a worldwide and
exclusive license to develop, manufacture and commercialize JTX-8064 and certain derivatives thereof, as well as any antibody or other biologic controlled
by us that is specifically directed to the LILRB2 receptor. Under the terms of the Celgene License Agreement, Celgene paid us a one-time, non-refundable
upfront payment of $50.0 million.

Celgene was subsequently acquired by Bristol Myers Squibb, or BMS, in November 2019 and the Celgene License Agreement was terminated effective
June 3, 2020. We now have sole worldwide rights to JTX-8064, and all of our intellectual property rights pertaining to JTX-8064 and licensed to Celgene
were reacquired by us.

In July 2016, we entered into a Master Research and Collaboration Agreement, or the Celgene Collaboration Agreement, and a Series B-1 Preferred Stock
Purchase Agreement with Celgene. Under the terms of these agreements, we received a $225.0 million upfront cash payment and $36.1 million from the
sale  of  10,448,100  shares  of  our  Series  B-1  convertible  preferred  stock,  which  shares  converted  into  2,831,463  shares  of  common  stock  upon  the
completion of our initial public offering, or IPO, in 2017. We terminated the Celgene Collaboration Agreement concurrently with entry into the Celgene
License Agreement.

Since  inception,  our  operations  have  focused  on  organizing  and  staffing  our  company,  business  planning,  raising  capital,  developing  our  Translational
Science Platform and conducting research, preclinical studies and clinical trials. We do not have any products approved for sale. We are subject to a number
of  risks  comparable  to  those  of  other  similar  companies,  including  dependence  on  key  individuals;  the  need  to  develop  commercially  viable  products;
competition  from  other  companies,  many  of  which  are  larger  and  better  capitalized;  and  the  need  to  obtain  adequate  additional  financing  to  fund  the
development  of  our  products.  We  have  funded  our  operations  primarily  through  proceeds  received  from  public  offerings  and  private  placements  of  our
stock totaling $298.5 million and up-front payments from our Celgene and Gilead collaboration and license agreements totaling $360.0 million.

Due to our significant research and development expenditures, we have accumulated substantial losses since our inception. As of December 31, 2020, we
had an accumulated deficit of $151.0 million. We expect to incur substantial additional losses in the future as we expand our research and development
activities.

The spread of COVID-19 during 2020 has caused an economic downturn on a global scale. As of February 25, 2021, we have not experienced a significant
financial impact directly related to the COVID-19 pandemic but have experienced some disruptions to clinical operations and to our supply chain. As the
pandemic continues to unfold, the extent of its effect on our operational and financial performance will depend in large part on future developments, which
cannot be predicted with confidence at this time.

Financial Operations Overview

Revenue

For the year ended December 31, 2020, we recognized $62.3 million of license revenue under the Gilead License Agreement entered into in October 2020.
For  the  year  ended  December  31,  2019,  we  recognized  $147.9  million  of  license  and  collaboration  revenue,  which  was  comprised  of  $50.0  million  of
license  revenue  under  the  Celgene  License  Agreement  and  $97.9  million  of  collaboration  revenue  under  the  Celgene  Collaboration  Agreement.  The
Celgene  Collaboration  Agreement  was  terminated  effective  July  22,  2019,  at  which  time  all  remaining  deferred  revenue  was  recognized  as  we  had  no
further performance obligations.

In the future, we may generate revenue from product sales or collaboration agreements, strategic alliances and licensing arrangements, including potential
milestone payments and royalties under the Gilead License Agreement. We expect that our revenue will fluctuate from quarter-to-quarter and year-to-year
as a result of the timing and amount of license fees, milestones, reimbursement of costs incurred and other payments, if any, and product sales, to the extent
any  products  are  successfully  commercialized.  If  we  or  third  parties  fail  to  complete  the  development  of  our  product  candidates  in  a  timely  manner  or
obtain

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regulatory approval for them, our ability to generate future revenue, and our results of operations and financial position, would be materially adversely
affected.

Operating Expenses

Research and Development Expenses

Research  and  development  expenses  represent  costs  incurred  by  us  for  the  discovery,  development  and  manufacture  of  our  current  and  future  product
candidates  and  include:  external  research  and  development  expenses  incurred  under  arrangements  with  third  parties,  including  contract  research
organizations, contract manufacturing organizations, academic and non-profit institutions and consultants; salaries and personnel-related costs, including
non-cash stock-based compensation expense; license fees to acquire in-process technology and other expenses, which include direct and allocated expenses
for laboratory, facilities and other costs.

We  use  our  employee  and  infrastructure  resources  across  multiple  research  and  development  programs  directed  toward  developing  our  Translational
Science Platform and for identifying, testing and developing product candidates. We manage certain activities such as contract research and manufacture of
our product candidates and discovery programs through our third-party vendors.

At  this  time,  we  cannot  reasonably  estimate  or  know  the  nature,  timing  and  estimated  costs  of  the  efforts  that  will  be  necessary  to  complete  the
development of our product candidates. We are also unable to predict when, if ever, material net cash inflows will commence from sales of our product
candidates. This is due to the numerous risks and uncertainties associated with developing such product candidates, including the uncertainty of:

•

•

•

•

•

•

•

•

•

•

•

•

addition and retention of key research and development personnel;

establishing an appropriate safety profile with IND-enabling toxicology studies;

the cost to acquire or make therapies to study in combination with our immunotherapies;

successful enrollment in and completion of clinical trials, including the impacts of the COVID-19 pandemic on the timing and progress of our
ongoing and planned clinical trials;

establishing  agreements  with  third-party  contract  manufacturing  organizations  for  clinical  supply  for  our  clinical  trials  and  commercial
manufacturing, if our product candidates are approved;

receipt of marketing approvals from applicable regulatory authorities;

commercializing products, if and when approved, whether alone or in collaboration with others;

the cost to develop companion diagnostics and/or complementary diagnostics as needed for each of our development programs;

the costs associated with the development of any additional product candidates we acquire through third-party collaborations or identify through
our Translational Science Platform;

the terms and timing of any collaboration, license or other arrangement, including the terms and timing of any milestone payments thereunder;

obtaining and maintaining patent and trade secret protection and regulatory exclusivity for our products, if and when approved; and

continued acceptable safety profiles of the products following approval.

A change in the outcome of any of these variables with respect to the development of any of our product candidates would significantly change the costs,
timing  and  viability  associated  with  the  development  of  that  product  candidate.  We  plan  to  increase  our  research  and  development  expenses  for  the
foreseeable future as we advance our product candidates through clinical trials and continue the enhancement of our Translational Science Platform and the
progression of our pipeline.

Due to the inherently unpredictable nature of preclinical and clinical development, we do not allocate all of our internal research and development expenses
on  a  program-by-program  basis  as  they  primarily  relate  to  personnel  and  lab  consumables  costs  that  are  deployed  across  multiple  programs  under
development.  Our  research  and  development  expenses  also  include  external  costs,  which  we  do  track  on  a  program-by-program  basis  following  the
program’s nomination as a development candidate. We began incurring such external costs for vopratelimab in 2015, JTX-4014 in 2016, JTX-8064 in 2017
and JTX-1811 in 2019.

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Included below are external research and development and external clinical and regulatory costs for vopratelimab, JTX-4014, JTX-1811, JTX-8064, and
our pre-development candidates:

(in thousands)
Vopratelimab
Vopratelimab / JTX-4014 combination
JTX-4014
JTX-1811
JTX-8064
Pre-development candidates

Total external research and development and clinical and regulatory costs

Year Ended December 31,

2020

2019

$

$

13,613  $
10,504 
2,866 
7,007 
1,674 
1,328 
36,992  $

16,778 

— 
2,785 
138 
5,225 
950 
25,876 

Research and development activities account for a significant portion of our operating expenses. As we continue to implement our business strategy, we
expect our research and development expenses to increase over the next several years. We expect that these expenses will increase as we:

•

•

•

•

•

continue our clinical development of JTX-8064, including our Phase 1 INNATE clinical trial of JTX-8064 as a monotherapy and in combination
with either JTX-4014 or pembrolizumab;

continue our clinical development of vopratelimab, including our Phase 2 SELECT clinical trial of vopratelimab and JTX-4014;

complete preclinical, IND-enabling and other development activities for JTX-1811 and transition the program to Gilead in accordance with the
terms of the Gilead License Agreement;

continue  to  identify  and  develop  potential  predictive  biomarkers  and  companion  diagnostics  and/or  complementary  diagnostics  for  our  product
candidates; and

continue to develop and enhance our Translational Science Platform and advance our pipeline of immunotherapy programs and our early research
activities into IND-enabling activities.

Product candidates in later stages of clinical development generally incur higher development costs than those in earlier stages of clinical development,
primarily due to the increased size and duration of later-stage clinical trials.

General and Administrative Expenses

General  and  administrative  expenses  consist  of  salaries  and  personnel-related  costs,  including  non-cash  stock-based  compensation  expense,  for  our
personnel in executive, business development, legal, finance and accounting, human resources and other administrative functions, consulting fees, facility
costs not otherwise included in research and development expenses, fees paid for accounting and tax services, insurance expenses and legal costs. Legal
costs include general corporate legal fees, patent legal fees and related costs. We anticipate that our general and administrative expenses will increase in the
future to support our continued operations.

Other Income, Net

Other income, net, consists primarily of interest and investment income on our cash, cash equivalents and investments.

Critical Accounting Policies and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which
have  been  prepared  in  accordance  with  generally  accepted  accounting  principles  in  the  United  States.  The  preparation  of  these  consolidated  financial
statements  requires  us  to  make  estimates  and  assumptions  that  affect  the  amounts  reported  in  the  financial  statements  and  accompanying  notes.  On  an
ongoing  basis,  our  management  evaluates  our  estimates  which  include,  but  are  not  limited  to,  estimates  related  to  revenue  recognized  under  the  Gilead
License Agreement and Celgene Collaboration Agreement (including estimates of internal and external costs expected to be incurred to satisfy performance
obligations), accrued expenses, stock-based compensation expense and income taxes. In addition, in 2019, we made estimates to determine the discount
rate utilized in the initial application of Accounting Standards Codification, or ASC, Topic 842, Leases, or ASC 842. We base our estimates on historical
experience and other market specific or other relevant assumptions we believe to be reasonable under the circumstances. Actual results could differ from
those estimates.

While  our  significant  accounting  policies  are  described  in  more  detail  in  the  notes  to  our  consolidated  financial  statements  appearing  elsewhere  in  this
Annual Report on Form 10-K, we believe the following accounting policies to be most critical to the judgments and estimates used in the preparation of our
consolidated financial statements.

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Revenue Recognition

We recognize revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers, or ASC 606. Under ASC 606, an entity recognizes
revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration that the entity expects to receive in
exchange for those goods or services. In applying ASC 606, we perform the following five steps: (i) identify the contract(s) with a customer; (ii) identify
the  promises  and  performance  obligations  in  the  contract;  (iii)  determine  the  transaction  price;  (iv)  allocate  the  transaction  price  to  the  performance
obligations in the contract; and (v) recognize revenue when (or as) we satisfy the performance obligations. We only apply the five-step model to contracts
when it is probable that we will collect the consideration to which we are entitled in exchange for the goods or services we transfer to the customer. At
contract  inception,  once  the  contract  is  determined  to  be  within  the  scope  of  ASC  606,  we  assess  the  goods  or  services  promised  within  each  contract,
determine those that are performance obligations and assess whether each promised good or service is distinct. We then recognize as revenue the amount of
the  transaction  price  that  is  allocated  to  the  respective  performance  obligation  when  (or  as)  the  performance  obligation  is  satisfied.  We  do  not  assess
whether a contract has a significant financing component if the expectation at contract inception is that the period between payment by the customer and
the transfer of promised goods or services to the customer will be one year or less.

The terms of our license agreements include upfront and license fees, milestones and other contingent payments for the achievement of defined certain
clinical, regulatory and sales-based milestone events, as well as royalties on sales of commercialized products. Arrangements that include upfront payments
may require deferral of revenue recognition to a future period until obligations under such arrangements are fulfilled. The event-based milestone payments
represent variable consideration, and we use the “most likely amount” method to estimate this variable consideration. Given the high degree of uncertainty
around the occurrence of these events, we determined the milestone and other contingent amounts to be fully constrained until the uncertainty associated
with  these  payments  is  resolved.  Revenue  will  be  recognized  from  sales-based  royalty  payments  when  or  as  the  sales  occur.  We  will  re-evaluate  the
transaction  price  in  each  reporting  period  as  uncertain  events  are  resolved  and  other  changes  in  circumstances  occur.  See  Note  3  to  our  consolidated
financial statements included within Part IV, Item 15 of this Annual Report on Form 10-K for further information on the application of ASC 606 to the
Celgene Collaboration Agreement, the Celgene License Agreement and the Gilead License Agreement.

Accrued Research and Development Expenses

As part of the process of preparing our consolidated financial statements, we are required to estimate our accrued research and development expenses as of
each balance sheet date. In accruing service fees, we estimate the time period over which services will be performed and the level of effort to be expended
in each period. This process involves reviewing open contracts and purchase orders, communicating with internal 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 the actual cost. We periodically confirm the accuracy of our estimates with our service providers and make adjustments if
necessary. The majority of our service providers invoice us monthly in arrears for services performed or when contractual milestones are met. The financial
terms of agreements with these service providers are subject to negotiation, vary from contract-to-contract and may result in uneven payment flows. In
circumstances where amounts have been paid in excess of costs incurred, we record a prepaid expense.

Although we do not expect our estimates to be materially different from amounts actually incurred, if our estimates of the status and timing of services
performed  differ  from  the  actual  status  and  timing  of  services  performed,  it  could  result  in  us  reporting  amounts  that  are  too  high  or  too  low  in  any
particular period. To date, there have been no material differences between our estimates of such expenses and the amounts actually incurred.

Stock-based Compensation

We  account  for  stock-based  payments  in  accordance  with  ASC  Topic  718,  Compensation—Stock  Compensation.  This  guidance  requires  all  stock-based
payments to employees, including grants of employee stock options, restricted stock awards and restricted stock units, to be recognized as expense in the
consolidated statements of operations and comprehensive income (loss) based on their grant date fair values. For stock options granted to employees and to
members of our board of directors for their services on the board of directors, we estimate the grant date fair value of each stock option using the Black-
Scholes option-pricing model. For restricted stock awards and restricted stock units granted to employees, we estimate the grant date fair value of each
award using intrinsic value, which is based on the value of the underlying common stock less any purchase price. For stock-based payments subject to
service-based vesting conditions, we recognize stock-based compensation expense equal to the grant date fair value of stock-based payment on a straight-
line basis over the requisite service period. 

The Black‑Scholes option pricing model requires the input of certain subjective assumptions, including (i) the calculation of expected term of the stock-
based payment, (ii) the risk‑free interest rate, (iii) the expected stock price volatility and (iv) the expected dividend yield. We use the simplified method as
prescribed by SEC Staff Accounting Bulletin No. 107 to calculate the

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expected term for stock options granted to employees as we do not have sufficient historical exercise data to provide a reasonable basis upon which to
estimate the expected term. We determine the risk‑free interest rate based on a treasury instrument whose term is consistent with the expected term of the
stock options. Because there had been no public market for our common stock prior to our IPO, there is a lack of historical and implied volatility data.
Accordingly, we base our estimates of expected volatility on the historical volatility of a group of publicly-traded companies with similar characteristics to
us, including stage of product development and therapeutic focus within the life sciences industry. Historical volatility is calculated over a period of time
commensurate  with  the  expected  term  of  the  stock-based  payment.  We  use  an  assumed  dividend  yield  of  zero  as  we  have  never  paid  dividends  on  our
common stock, nor do we expect to pay dividends on our common stock in the foreseeable future.

We account for forfeitures of all stock-based payments when such forfeitures occur.

Income Taxes

Income taxes are recorded in accordance with ASC Topic 740, Income Taxes, which provides for deferred taxes using an asset and liability approach. We
recognize  deferred  tax  assets  and  liabilities  for  the  expected  future  tax  consequences  of  events  that  have  been  included  in  the  consolidated  financial
statements or tax returns. Deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets
and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. A valuation allowance against deferred tax
assets is recorded if, based on the weight of the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized.

We  account  for  uncertain  tax  positions  using  a  more-likely-than-not  threshold  for  recognizing  and  resolving  uncertain  tax  positions.  The  evaluation  of
uncertain tax positions is based on factors, including, but not limited to, changes in the law, the measurement of tax positions taken or expected to be taken
in tax returns, the effective settlement of matters subject to audit, new audit activity and changes in facts or circumstances related to a tax position.

Recent Accounting Pronouncements

See  Note  2  to  our  consolidated  financial  statements  included  within  Part  IV,  Item  15  of  this  Annual  Report  on  Form  10-K  for  a  description  of  recent
accounting pronouncements applicable to our business.

Results of Operations

Comparison of the Years Ended December 31, 2020 and 2019

The following table summarizes our results of operations for the years ended December 31, 2020 and 2019:

(in thousands)
Revenue:

License and collaboration revenue—related party

Operating expenses:

Research and development
General and administrative
Total operating expenses

Operating (loss) income
Other income, net          
(Loss) income before provision for income taxes
Provision for income taxes

Net (loss) income

License and Collaboration Revenue

Year Ended December 31,

2020

2019

$ Change

62,339  $

147,872  $

(85,533)

78,690 
28,766 
107,456 
(45,117)
1,289 
(43,828)
14 
(43,842) $

67,135 
27,920 
95,055 
52,817 
4,052 
56,869 
46 
56,823  $

11,555 
846 
12,401 
(97,934)
(2,763)
(100,697)
(32)
(100,665)

$

$

For the year ended December 31, 2020, we recognized $62.3 million of license revenue under the Gilead License Agreement entered into in October 2020.
For  the  year  ended  December  31,  2019,  we  recognized  $147.9  million  of  license  and  collaboration  revenue,  which  was  comprised  of  $50.0  million  of
license  revenue  under  the  Celgene  License  Agreement  and  $97.9  million  of  collaboration  revenue  under  the  Celgene  Collaboration  Agreement.  The
Celgene  Collaboration  Agreement  was  terminated  effective  July  22,  2019,  at  which  time  all  remaining  deferred  revenue  was  recognized  as  we  had  no
further performance obligations.

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Research and Development Expenses

The following table summarizes our research and development expenses for the years ended December 31, 2020 and 2019:

(in thousands)
Employee compensation
External clinical and regulatory
External research and development
Lab consumables
Facility costs
Research consulting
Other research

Total research and development expenses

Year Ended December 31,

2020

2019

$ Change

$

$

27,880  $
25,340 
11,652 
6,042 
5,522 
505 
1,749 
78,690  $

25,002  $
17,414 
8,462 
6,841 
5,813 
917 
2,686 
67,135  $

2,878 
7,926 
3,190 
(799)
(291)
(412)
(937)
11,555 

Research and development expenses increased by $11.6 million from $67.1 million for the year ended December 31, 2019 to $78.7 million for the year
ended December 31, 2020. The increase in research and development expenses was primarily attributable to:

•

•

•

•

•

$7.9 million of increased external clinical and regulatory costs primarily attributable to our SELECT clinical trial which commenced in 2020;

$3.2 million of increased external research and development costs primarily attributable to IND-enabling expenses related to JTX-1811, partially
offset by reduced expenses related to JTX-8064 incurred during the year ended December 31, 2020;

$2.9 million of increased employee compensation costs primarily attributable to increased headcount, merit and bonus expense;

partially offset by $0.9 million of decreased other research costs primarily attributable to reduced travel expenses resulting from COVID-19 travel
limitations; and

$0.8 million of decreased lab consumables costs.

General and Administrative Expenses

The following table summarizes our general and administrative expenses for the years ended December 31, 2020 and 2019:

(in thousands)
Employee compensation
Professional services
Facility costs
Other

Total general and administrative expenses

Year Ended December 31,

2020

2019

$ Change

$

$

15,137  $
4,927 
4,332 
4,370 
28,766  $

13,606  $
5,134 
4,580 
4,600 
27,920  $

1,531 
(207)
(248)
(230)
846 

General  and  administrative  expenses  increased  by  $0.8  million  from  $27.9  million  for  the  year  ended  December  31,  2019  to  $28.8  million  for  the  year
ended  December  31,  2020.  The  increase  in  general  and  administrative  expenses  was  primarily  attributable  to  $1.5  million  of  increased  employee
compensation costs related to increased merit and bonus expense for the year ended December 31, 2020.

Other Income, net

Other income, net, decreased by $2.8 million from $4.1 million for the year ended December 31, 2019 to $1.3 million for the year ended December 31,
2020. The decrease in other income, net is attributable to reduced interest rates due to current market conditions.

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Liquidity and Capital Resources

Sources of Liquidity

We have funded our operations primarily through proceeds received from public offerings and private placements of our stock totaling $298.5 million and
up-front payments from our Celgene and Gilead collaboration and license agreements totaling $360.0 million. As of December 31, 2020, we had cash, cash
equivalents and investments of $213.2 million.

On December 17, 2019, we entered into a Sales Agreement with Cowen and Company, LLC, or Cowen, pursuant to which we offered and sold shares of
our common stock with an aggregate offering price of up to $50.0 million under the ATM Offering. The Sales Agreement provides that Cowen will be
entitled to a sales commission equal to 3.0% of the gross sales price per share of all shares sold under the ATM Offering. As of December 31, 2020, we had
sold an aggregate of 2,522,121 shares under the ATM Offering at an average price of $7.47 per share for net proceeds of $18.0 million after deducting sales
commissions and offering expenses, of which $14.5 million was received during the year ended December 31, 2020.

In January 2021, we sold an aggregate of 3,156,200 shares at an average price of $9.87 per share for net proceeds of $30.2 million. Consequently, we have
completed the sale of all available amounts under the ATM Offering, of which three investors account for $43.1 million of all funds raised (see Note 16 to
our consolidated financial statements included within Part IV, Item 15 of this Annual Report on Form 10-K).

Funding Requirements

Our plan of operation is to continue implementing our business strategy, the research and development of our current product candidates, our preclinical
development  activities,  the  expansion  of  our  research  pipeline  and  the  enhancement  of  our  internal  research  and  development  capabilities.  Due  to  the
inherently  unpredictable  nature  of  preclinical  and  clinical  development  and  given  the  early  stage  of  our  programs  and  product  candidates,  we  cannot
reasonably estimate the costs we will incur and the timelines that will be required to complete development, obtain marketing approval, and commercialize
our products, if and when approved. For the same reasons, we are also unable to predict when, if ever, we will generate revenue from product sales or
whether, or when, if ever, we may achieve profitability. Clinical and preclinical development timelines, the probability of success, and development costs
can differ materially from expectations. In addition, we cannot forecast which products, if and when approved, may be subject to future collaborations,
when such arrangements will be secured, if at all, and to what degree such arrangements would affect our development plans and capital requirements.

Due  to  our  significant  research  and  development  expenditures,  we  have  generated  substantial  operating  losses  since  inception.  We  have  incurred  an
accumulated deficit of $151.0 million through December 31, 2020. We expect to incur substantial additional losses in the future as we expand our research
and development activities and continue to advance our programs. Based on our research and development plans, we expect that our existing cash, cash
equivalents  and  investments  of  $213.2  million  will  enable  us  to  fund  our  operating  expenses  and  capital  expenditure  requirements  through  the  second
quarter of 2023. However, we have based this estimate on assumptions that may prove to be incorrect, and we could exhaust our capital resources sooner
than we expect. The timing and amount of our operating expenditures will depend largely on:

•

•

•

•

•

•

•

•

•

the timing and progress of preclinical and clinical development activities, including the impacts of the COVID-19 pandemic on the timing and
progress of our ongoing and planned clinical trials;

the cost to access, acquire or develop therapies to study in combination with our immunotherapies;

successful enrollment in and completion of clinical trials;

the cost to develop companion diagnostics and/or complementary diagnostics as needed for each of our development programs;

our ability to establish agreements with third-party manufacturers for clinical supply for our clinical trials and, if any of our product candidates are
approved, commercial manufacturing;

the  costs  associated  with  the  development  of  any  additional  product  candidates  we  acquire  through  acquisition  or  third-party  collaborations  or
identify through our Translational Science Platform;

our ability to maintain our current research and development programs and enhancement of our Translational Science Platform;

addition and retention of key research and development personnel;

our efforts to enhance operational, financial and information management systems, and hire additional personnel, including personnel to support
development of our product candidates;

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•

•

•

•

the legal patent costs involved in prosecuting patent applications and enforcing patent claims and other intellectual property claims;

the costs and ongoing investments to in-license or acquire additional technologies, including the in-license of intellectual property related to our
potential product candidates;

the progress and success of our exclusive license of JTX-1811 to Gilead; and

the  terms  and  timing  of  any  other  collaboration,  license  or  other  arrangement,  including  the  terms  and  timing  of  any  option  and  milestone
payments thereunder.

A change in the outcome of any of these or other variables with respect to the development of any of our product candidates could significantly change the
costs and timing associated with the development of that product candidate. Furthermore, our operating plans may change in the future, and we may need
additional funds to meet operational needs and capital requirements associated with such operating plans.

In addition to the variables described above, if and when any of our product candidates successfully complete development, we expect to incur substantial
additional  costs  associated  with  regulatory  filings,  marketing  approval,  post-marketing  requirements,  maintaining  our  intellectual  property  rights,  and
regulatory protection, in addition to other costs. We cannot reasonably estimate these costs at this time.

Until  such  time,  if  ever,  as  we  can  generate  substantial  product  revenue,  we  expect  to  finance  our  cash  needs  through  a  combination  of  equity  or  debt
financings, collaborations, licensing arrangements and strategic alliances. We currently do not have a credit facility or committed sources of capital. To the
extent that we raise additional capital through the future sale of equity or debt, the ownership interests of our stockholders will be diluted, and the terms of
these securities may include liquidation or other preferences that adversely affect the rights of our existing common stockholders. If we raise additional
funds through the issuance of debt securities, these securities could contain covenants that would restrict our operations. We may require additional capital
beyond  our  currently  anticipated  amounts.  Additional  capital  may  not  be  available  on  reasonable  terms,  or  at  all.  If  we  raise  additional  funds  through
collaboration arrangements in the future, we may have to relinquish valuable rights to our technologies, future revenue streams or product candidates, or
grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may
be required to delay, limit, reduce, or terminate development or future commercialization efforts, or grant rights to develop and market product candidates
that we would otherwise prefer to develop and market ourselves.

Cash Flows

The following table provides information regarding our cash flows for the years ended December 31, 2020 and 2019:

(in thousands)
Net cash (used in) provided by:

Operating activities
Investing activities
Financing activities

Net increase in cash, cash equivalents and restricted cash

Cash Used in Operating Activities

Year Ended December 31,

2020

2019

$

$

(27,788) $
51,298 
70,742 
94,252  $

(30,129)
31,382 
4,082 
5,335 

Net cash used in operating activities for the year ended December 31, 2020 was $27.8 million, compared to net cash used in operating activities of $30.1
million  for  the  year  ended  December  31,  2019.  Cash  used  in  operating  activities  decreased  by  $2.3  million  primarily  due  to  $62.3  million  in  revenue
recognized under the Gilead License Agreement in 2020, partially offset by $50.0 million in revenue recognized under the Celgene License Agreement
during 2019 and increased operating expenses during the year ended December 31, 2020.

Cash Provided by Investing Activities

Net cash provided by investing activities for the year ended December 31, 2020 was $51.3 million, compared to net cash provided by investing activities of
$31.4 million for the year ended December 31, 2019. Cash provided by investing activities increased by $19.9 million as cash was reinvested into cash
equivalents,  as  opposed  to  other  short-term  and  long-term  investments,  due  to  current  market  conditions  during  the  year  ended  December  31,  2020.
Proceeds received from maturities and sales of investments were either re-invested or used to fund operations.

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Cash Provided by Financing Activities

Net cash provided by financing activities for the year ended December 31, 2020 was $70.7 million, compared to net cash provided by financing activities
of $4.1 million for the year ended December 31, 2019. Cash provided by financing activities increased by $66.7 million due to Gilead’s equity investment
of $55.7 million, at fair value at the closing, and the receipt of $14.5 million of net proceeds from our ATM Offering during the year ended December 31,
2020.

Off-Balance Sheet Arrangements

We did not have, during the periods presented, and we do not currently have, any off-balance sheet arrangements, as defined under applicable SEC rules.

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

We are a smaller reporting company as defined by Rule 12b-2 of the Exchange Act and are not required to provide the information under this item.

Item 8. Financial Statements and Supplementary Data

The  financial  statements  required  to  be  filed  pursuant  to  this  Item  8  are  appended  to  this  Annual  Report  on  Form  10-K.  An  index  of  those  financial
statements is found in Part IV, Item 15.

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and our principal financial officer, evaluated the effectiveness of our disclosure
controls and procedures as of December 31, 2020. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the
Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by the company in
the  reports  that  it  files  or  submits  under  the  Exchange  Act  is  recorded,  processed,  summarized  and  reported,  within  the  time  periods  specified  in  the
Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed
to  ensure  that  information  required  to  be  disclosed  by  a  company  in  the  reports  that  it  files  or  submits  under  the  Exchange  Act  is  accumulated  and
communicated to the company’s management, including its principal executive and principal financial officers, or persons performing similar functions, as
appropriate  to  allow  timely  decisions  regarding  required  disclosure.  Our  management  recognizes  that  any  controls  and  procedures,  no  matter  how  well
designed  and  operated,  can  provide  only  reasonable  assurance  of  achieving  their  objectives  and  our  management  necessarily  applies  its  judgment  in
evaluating  the  cost-benefit  relationship  of  possible  controls  and  procedures.  Based  on  the  evaluation  of  our  disclosure  controls  and  procedures  as  of
December 31, 2020, our principal executive officer and principal financial officer concluded that, as of such date, our disclosure controls and procedures
were effective at the reasonable assurance level.

Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting
is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act as a process designed by, or under the supervision of, a company’s principal executive
officer  and  principal  financial  officer,  or  persons  performing  similar  functions,  and  effected  by  a  company’s  board  of  directors,  management,  and  other
personnel, 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 and includes those policies and procedures that:

•

•

•

pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of a company’s assets;

provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally
accepted  accounting  principles,  and  that  a  company’s  receipts  and  expenditures  are  being  made  only  in  accordance  with  authorizations  of  the
company’s management and directors; and

provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have
a material effect on the financial statements.

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Because  of  its  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements.  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.

Under  the  supervision  of  and  with  the  participation  of  our  principal  executive  officer  and  principal  financial  officer,  our  management  assessed  the
effectiveness  of  our  internal  control  over  financial  reporting  as  of  December  31,  2020  based  on  the  criteria  set  forth  by  the  Committee  of  Sponsoring
Organizations of the Treadway Commission in Internal Control—Integrated Framework (2013). Based on this assessment, management concluded that our
internal control over financial reporting was effective as of December 31, 2020.

This Annual Report on Form 10-K does not include an attestation report of our independent registered public accounting firm due to a transition period
established by rules of the SEC for newly public companies.

Changes in Internal Control over Financial Reporting

There was no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15(d)-15(f) under the Exchange Act) that occurred
during the fourth quarter of the year ended December 31, 2020 that has materially affected, or is reasonably likely to materially affect, our internal control
over financial reporting.

Item 9B. Other Information

None.

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Item 10. Directors, Executive Officers and Corporate Governance

PART III

Board of Directors

Board Composition and Structure

The  Board  of  Directors  is  currently  comprised  of  nine  members.  Below  is  a  list  of  the  names,  ages  as  of  February  19,  2021,  and  classification  of  the
individuals who currently serve as our directors.

Name
Luis A. Diaz, Jr., M.D.
Barbara Duncan
J. Duncan Higgons
Robert Iannone, M.D., M.S.C.E.
Robert Kamen, Ph.D.
Perry Karsen
Richard Murray, Ph.D.
Cary Pfeffer, M.D.
Luisa Salter-Cid, Ph.D.

Director Biographies

Age
50
56
66
53
76
65
62
58
56

Position
Director (Class II)
Director (Class II)
Director (Class I)
Director (Class I)
Director (Class II)
Chairman of the Board of Directors (Class III)
Director (Class III); Chief Executive Officer and President
Director (Class III)
Director (Class I)

Luis Diaz, Jr., M.D.—Dr. Diaz has served as the head of the solid tumor oncology division and a faculty member at the Memorial Sloan Kettering Cancer
Center  since  December  2016.  From  2004  to  December  2016,  Dr.  Diaz  was  a  faculty  member  and  physician  at  Johns  Hopkins  University  School  of
Medicine. Dr. Diaz is also a founder and board member, and from 2010 to April 2016 served as president, chief executive officer and chief medical officer,
of Personal Genome Diagnostics Inc., a private cancer genome analysis company. He received his M.D. from the University of Michigan, where he also
received his B.A. in Microbiology. We believe Dr. Diaz is qualified to serve on our board of directors due to his background as a physician focused on
oncology and his experience as a faculty member at a major hospital and medical center.

Barbara Duncan—Ms. Duncan served as the chief financial officer of Intercept Pharmaceuticals Inc., a public biopharmaceutical company, from May 2009
to June 2016 and as treasurer from 2010 to June 2016. She has served on the board of directors of Adaptimmune Therapeutics plc since June 2016, Atea
Pharmaceuticals, Inc. since October 2020, Fusion Pharmaceuticals Inc. since October 2020, ObsEva SA since December 2016 and Ovid Therapeutics, Inc.
since June 2017, each of which is a public therapeutics company. She previously served on the board of public companies Immunomedics Inc. from March
2019 to October 2020, Aevi Genomic Medicine, Inc. (formerly Medgenics, Inc.) from June 2015 to February 2020 and Innoviva, Inc. from September 2016
to April 2018. Ms. Duncan holds an M.B.A. from the Wharton School of Business and a B.S. from Louisiana State University. We believe Ms. Duncan is
qualified  to  serve  on  our  board  of  directors  because  of  her  experience  in  the  biopharmaceutical  industry,  her  experience  in  the  financial  sector  and
membership on boards of directors of other public and private companies.

J. Duncan Higgons—Mr. Higgons served as chief operating officer of Agios Therapeutics, Inc., a public biopharmaceutical company, from 2009 to January
2016.  Mr.  Higgons  serves  on  the  board  of  directors  of  Rheos  Medicines,  Inc.,  PsiOxus  Therapeutics  Ltd.  and  previously  served  on  the  board  of  Auron
Therapeutics, Inc., all of which are private life science companies. He holds a B.Sc. in Mathematics from King's College University of London and a M.Sc.
in  Economics  from  London  Business  School.  We  believe  that  Mr.  Higgons  is  qualified  to  serve  on  our  board  of  directors  due  to  his  leadership  and
management experience.

Robert Iannone, M.D., M.S.C.E.—Dr. Iannone has served as the Executive Vice President, Research and Development of Jazz Pharmaceuticals plc since
May 2019. Previously, he served as the Chief Medical Officer and Head of Research and Development at Immunomedics, Inc. from April 2018 until May
2019. Dr. Iannone has also held leadership roles at AstraZeneca and Merck & Co. At AstraZeneca, from July 2014 until April 2018, he was employed in
the roles of Senior Vice President and Head of Immuno-oncology, Global Medicines Development. At Merck & Co., Dr. Iannone served in various roles,
culminating  with  his  role  as  Executive  Director  and  Section  Head  of  Oncology  Clinical  Development.  Dr.  Iannone  received  a  B.S.  from  The  Catholic
University of America, an M.D. from the Yale School of Medicine and an M.S.C.E. from the University of Pennsylvania Perelman School of Medicine. We
believe Dr. Iannone is qualified to serve on our board of directors due to his background as a physician focused on oncology and his leadership experience
in the life science industry.

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Robert Kamen, Ph.D.—Dr. Kamen has been a venture partner at Third Rock Ventures, LLC, or TRV, since December 2017, and he previously served as an
entrepreneur-in-residence at TRV from 2010 through 2017. Dr. Kamen also served as our interim chief technology officer from February 2013 to December
2015.  Dr.  Kamen  served  on  the  board  of  directors  of  Neon  Therapeutics,  Inc.,  a  public  immuno-oncology  company,  from  2015  through  May  2020  and
serves on the boards of directors for several private companies, including EpimAb Biotherapeutics, Inc. and Lycera Corporation. Dr. Kamen holds a Ph.D.
in biochemistry and molecular biology from Harvard University and a B.S. in biophysics from Amherst College. We believe that Dr. Kamen is qualified to
serve  on  our  board  of  directors  because  of  his  experience  in  the  venture  capital  and  life  sciences  industries,  membership  on  various  other  boards  of
directors, and his leadership and management experience.

Perry Karsen—Mr. Karsen has served as the chairman of our board of directors since April 2016. Mr. Karsen retired from Celgene Corporation at the end
of 2015 and currently is a venture partner at Samsara BioCapital, as well as the executive chair of Autobahn Labs. He serves as a member of the board of
Jiya Acquisition Corp., a public blank check special purpose acquisition company affiliated with Samsara BioCapital, the executive chair of the board of
directors  of  Nitrome  Biosciences,  and  a  member  of  the  boards  of  directors  for  ESCAPE  Bio,  Inc.,  Graphite  Bio,  Inc.  and  the  Gladstone  Foundation.
Previously, Mr. Karsen served on the boards of directors of Intellia Therapeutics, Inc. from April 2016 to December 2020, Voyager Therapeutics, Inc. from
July 2015 to August 2019, OncoMed Pharmaceuticals, Inc. from January 2016 to April 2019, Agios Pharmaceuticals, Inc. from November 2011 to March
2016, each of which is a public life sciences company. Mr. Karsen received a Masters of Management from Northwestern University's Kellogg Graduate
School of Management, a Masters of Arts in Teaching of Biology from Duke University and a B.S. in Biological Sciences from the University of Illinois,
Urbana-Champaign. We believe Mr. Karsen is qualified to serve on our board of directors because of his executive leadership experience and membership
on boards of directors of other public companies.

Richard Murray, Ph.D.—Dr. Murray has served as our president, chief executive officer and a member of our board of directors since July 2014. Prior to
joining  Jounce,  Dr.  Murray  served  as  senior  vice  president  of  biologics  and  vaccines  research  and  development  at  Merck  &  Co.,  a  global  healthcare
company,  from  2009  to  June  2014  where  he  was  responsible  for  the  advancement  of  biologics  and  vaccines,  including  Merck's  cancer  immunotherapy
pipeline.  Since  June  2019,  he  has  served  as  a  director  of  Platelet  Biogenesis,  Inc.,  a  private  biotechnology  company.  Dr.  Murray  holds  a  Ph.D.  in
microbiology and immunology from the University of North Carolina at Chapel Hill and a B.S. in microbiology from the University of Massachusetts,
Amherst. We believe that Dr. Murray is qualified to serve on our board of directors due to his operating and historical experience gained from serving as
our president, chief executive officer and as a board member, combined with his experience in drug research and development.

Cary Pfeffer, M.D.—Dr. Pfeffer is a partner at TRV, which he joined in 2007. Dr. Pfeffer served as the chairman of our board from July 2014 to April 2016
and as our interim chief executive officer from February 2013 to July 2014. Dr. Pfeffer was the interim chief executive officer of Faze Medicines, Inc. from
December 2020 to January 2021, the interim chief executive officer of Neon Therapeutics, Inc. from October 2015 to September 2016, the interim chief
business officer of Rheos Medicines, Inc. from March 2018 to November 2018, and the interim chief business officer of Casma Therapeutics, Inc. from
May  2018  to  December  2018.  Dr.  Pfeffer  serves  on  the  boards  of  directors  for  several  private  companies,  including  Casma  Therapeutics,  Inc.,  Faze
Medicines,  Inc.,  Rheos  Medicines,  Inc.  and  Tango  Therapeutics,  Inc.  Previously,  he  served  as  a  director  of  Neon  Therapeutics,  Inc.,  a  public  immuno-
oncology company, from May 2015 to May 2020. From August 2009 to September 2016, Dr. Pfeffer served as a director of Eleven Biotherapeutics, Inc., a
public  biologics  oncology  company,  and  as  its  chief  business  officer  from  February  2010  to  September  2011.  Dr.  Pfeffer  received  an  M.B.A.  from  the
Wharton School of Business, an M.D. from the University of Pennsylvania School of Medicine and a B.A. in biochemistry from Columbia University. We
believe  that  Dr.  Pfeffer  is  qualified  to  serve  on  our  board  of  directors  because  of  his  experience  in  the  venture  capital  industry,  life  sciences  industry,
membership  on  various  other  boards  of  directors,  his  prior  service  as  our  president  and  chief  executive  officer,  and  his  leadership  and  management
experience.

Luisa  Salter-Cid,  Ph.D.—Dr.  Salter-Cid  has  served  as  the  Chief  Scientific  Officer  of  Gossamer  Bio,  Inc.,  or  Gossamer,  a  publicly-traded  clinical-stage
biopharmaceutical  company,  since  August  2018.  Prior  to  joining  Gossamer,  Dr.  Salter-Cid  worked  at  Bristol  Myers  Squibb  in  increasing  positions  of
responsibility  from  2005  to  August  2018,  most  recently  as  Vice  President  and  Head  of  Immunology,  small  molecule  Immuno-Oncology  and  Genomics
Discovery where she focused on target validation and development of innovative biologic and small-molecule therapeutics to address significant unmet
needs in autoimmune diseases and cancer. She was a member of the Scientific Advisory Board of Enterome SA until July 2018. Dr. Salter-Cid holds a B.S.
in Biology from University of Lisbon and a Ph.D. in Immunology from the University of Miami School of Medicine. We believe that Dr. Salter-Cid is
qualified to serve on our board of directors because of her leadership experience in the life science industry and experience in immuno-oncology.

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Executive Officers

The following table sets forth our executive officers as of February 19, 2021.

(1)

Name
Richard Murray, Ph.D.
Kimberlee C. Drapkin
Hugh M. Cole
Elizabeth G. Trehu, M.D.

Age
62
53
55
60

Position
President, Chief Executive Officer and Director
Chief Financial Officer and Treasurer
Chief Business Officer and Head of Corporate Development
Chief Medical Officer

    (1) Richard Murray, Ph.D. is also a member of the Board of Directors and his biographical information appears above.

Kimberlee C. Drapkin—Ms. Drapkin has served as our chief financial officer since August 2015, and our treasurer since February 2013. From 2009 to
August 2015, Ms. Drapkin was the owner of KCD Financial LLC, through which she served as our interim chief financial officer from 2012 to August
2015, and consulted for numerous biotechnology companies. Ms. Drapkin began her career at PricewaterhouseCoopers LLP, is a certified public accountant
and holds a B.S. in accounting from Babson College.

Hugh M. Cole—Prior to joining Jounce in August 2017, Mr. Cole served as chief business officer for ARIAD Pharmaceuticals, Inc., an oncology company,
from March 2014 to June 2017, where he led numerous business development transactions. Previously, Mr. Cole served as senior vice president, strategic
planning and program management at Shire plc, a global biopharmaceutical company, from 2007 to March 2014. Mr. Cole earned his M.B.A. in health care
management and finance at the Wharton School of Business and his A.B. in chemistry from Harvard University.

Elizabeth G. Trehu, M.D.—Dr. Trehu joined Jounce as our chief medical officer in November 2015. Prior to joining Jounce, Dr. Trehu served as the chief
medical  officer  of  Promedior,  Inc.,  a  biotechnology  company,  from  2012  to  November  2015.  Dr.  Trehu  holds  an  M.D.  from  the  New  York  University
School of Medicine and an A.B. in English from Princeton University.

Code of Ethics

We  have  adopted  a  written  code  of  business  conduct  and  ethics  that  applies  to  our  directors,  officers,  and  employees,  including  our  principal  executive
officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions. A copy of the code is posted on the
Corporate Governance section of our website, which is located at www.jouncetx.com. If we make any substantive amendments to, or grant any waivers
from, the code of business conduct and ethics for any officer or director, we will disclose the nature of such amendment or waiver on our website or in a
current report on Form 8-K. We will provide any person, without charge, a copy of such Code of Business Conduct and Ethics upon written request, which
may be mailed to 780 Memorial Drive, Cambridge, MA 02139, Attn: Corporate Secretary.

Additional  information  required  by  this  Item  10  will  be  included  in  the  sections  captioned  “Proposal  1  -  Election  of  Three  Class  I  Directors”  and
“Corporate  Governance”  and  “Delinquent  Section  16(a)  Reports,”  if  applicable,  in  our  definitive  Proxy  Statement  for  our  2021  Annual  Meeting  of
Stockholders to be filed with the SEC within 120 days of December 31, 2020, which information is incorporated herein by reference.

Item 11. Executive Compensation

The  information  required  by  this  Item  11  will  be  included  in  the  section  captioned  “Executive  and  Director  Compensation”  in  our  definitive  Proxy
Statement  for  our  2021  Annual  Meeting  of  Stockholders  to  be  filed  with  the  SEC  within  120  days  of  December  31,  2020,  which  information  is
incorporated herein by reference.

Item 12. Security Ownership of Certain of Beneficial Owners and Management and Related Stockholder Matters

The information required by this Item 12 will be included in the section captioned “Principal Stockholders” and “Equity Compensation Plan Information”
in our definitive Proxy Statement for our 2021 Annual Meeting of Stockholders to be filed with the SEC within 120 days of December 31, 2020, which
information is incorporated herein by reference.

Item 13. Certain Relationships and Related Transactions and Director Independence

The information required by this Item 13 will be included in the sections captioned “Corporate Governance” and “Transactions with Related Persons” in
our  definitive  Proxy  Statement  for  our  2021  Annual  Meeting  of  Stockholders  to  be  filed  with  the  SEC  within  120  days  of  December  31,  2020,  which
information is incorporated herein by reference.

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Item 14. Principal Accountant Fees and Services

The  information  required  by  this  Item  14  will  be  included  in  the  section  captioned  “Ratification  of  the  Selection  of  Independent  Registered  Public
Accounting  Firm”  in  our  definitive  Proxy  Statement  for  our  2021  Annual  Meeting  of  Stockholders  to  be  filed  with  the  SEC  within  120  days  of
December 31, 2020, which information is incorporated herein by reference.

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Item 15. Exhibits and Financial Statement Schedules

(1) Financial Statements

PART IV

The following documents are attached hereto and are filed as part of this Annual Report on Form 10-K.    

Report of Independent Registered Public Accounting Firm
Consolidated Balance Sheets
Consolidated Statements of Operations and Comprehensive (Loss) Income
Consolidated Statements of Stockholders’ Equity
Consolidated Statements of Cash Flows
Notes to Consolidated Financial Statements

(2) Financial Statement Schedules

F-1
F-2
F-3
F-4
F-5
F-6

Schedules have been omitted since they are either not required or not applicable or the information is otherwise included herein.

(3) Exhibits

The exhibits filed or furnished as part of this Annual Report on Form 10-K are listed in the Exhibit Index immediately preceding the signatures, which
Exhibit Index is incorporated herein by reference.

Item 16. Form 10-K Summary

None.

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Jounce Therapeutics, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Jounce Therapeutics, Inc. (the Company) as of December 31, 2020 and 2019, the related
consolidated statements of operations and comprehensive (loss) income, stockholders' equity and cash flows for each of the two years in the period ended
December 31, 2020, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial
statements present fairly, in all material respects, the financial position of the Company at December 31, 2020 and 2019, and the results of its operations
and its cash flows for each of the two years in the period ended December 31, 2020, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial
statements  based  on  our  audits.  We  are  a  public  accounting  firm  registered  with  the  Public  Company  Accounting  Oversight  Board  (United  States)
(PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and
regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor
were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of
internal  control  over  financial  reporting  but  not  for  the  purpose  of  expressing  an  opinion  on  the  effectiveness  of  the  Company's  internal  control  over
financial reporting. Accordingly, we express no such opinion.

Our  audits  included  performing  procedures  to  assess  the  risks  of  material  misstatement  of  the  financial  statements,  whether  due  to  error  or  fraud,  and
performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in
the  financial  statements.  Our  audits  also  included  evaluating  the  accounting  principles  used  and  significant  estimates  made  by  management,  as  well  as
evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2013.

Boston, Massachusetts
February 25, 2021

F-1

Table of Contents

Jounce Therapeutics, Inc.
Consolidated Balance Sheets
(amounts in thousands, except par value amounts)

Assets:
Current assets:

Cash and cash equivalents
Short-term investments
Prepaid expenses and other current assets
Total current assets

Property and equipment, net
Long-term investments
Operating lease right-of-use asset
Other non-current assets               

Total assets               

Liabilities and stockholders’ equity:
Current liabilities:

Accounts payable
Accrued expenses
Deferred revenue, current—related party
Operating lease liability, current
Other current liabilities               
Total current liabilities

Operating lease liability, net of current portion

Total liabilities

Commitments and contingencies (Note 13)
Stockholders’ equity:

Preferred stock, $0.001 par value: 5,000 shares authorized at December 31, 2020 and 2019; no shares issued or
outstanding at December 31, 2020 and 2019
Common stock, $0.001 par value: 160,000 shares authorized at December 31, 2020 and 2019; 41,729 and 33,738
shares issued at December 31, 2020 and 2019, respectively; 41,729 and 33,738 shares outstanding at December 31,
2020 and 2019, respectively
Additional paid-in capital
Accumulated other comprehensive (loss) income
Accumulated deficit
Total stockholders’ equity

Total liabilities and stockholders’ equity

December 31,

2020

2019

147,493  $
58,985 
4,913 
211,391 
7,336 
6,710 
14,856 
3,943 
244,236  $

2,036  $
12,044 
1,931 
3,271 
42 
19,324 
13,618 
32,942 

53,241 
115,602 
4,854 
173,697 
10,672 
1,601 
17,615 
2,297 
205,882 

2,460 
8,907 
— 
2,901 
132 
14,400 
16,889 
31,289 

— 

— 

42 
362,270 
(17)
(151,001)
211,294 
244,236  $

34 
281,664 
54 
(107,159)
174,593 
205,882 

$

$

$

$

The accompanying notes are an integral part of these consolidated financial statements.

F-2

 
 
 
 
 
 
 
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Jounce Therapeutics, Inc.
Consolidated Statements of Operations and Comprehensive (Loss) Income
(amounts in thousands, except per share amounts)

Revenue:

License and collaboration revenue—related party

Operating expenses:

Research and development
General and administrative
Total operating expenses

Operating (loss) income
Other income, net          
(Loss) income before provision for income taxes
Provision for income taxes

Net (loss) income
Net (loss) income per share, basic
Net (loss) income per share, diluted
Weighted-average common shares outstanding, basic
Weighted-average common shares outstanding, diluted
Comprehensive (loss) income:
Net (loss) income
Other comprehensive income:

Unrealized (loss) gain on available-for-sale securities               

Comprehensive (loss) income

Year Ended December 31,

2020

2019

62,339  $

147,872 

78,690 
28,766 
107,456 
(45,117)
1,289 
(43,828)
14 
(43,842) $

(1.24) $
(1.24) $

35,426 
35,426 

(43,842) $

(71)
(43,913) $

67,135 
27,920 
95,055 
52,817 
4,052 
56,869 
46 
56,823 

1.72 
1.66 
33,080 
34,294 

56,823 

132 
56,955 

$

$

$
$

$

$

The accompanying notes are an integral part of these consolidated financial statements.

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Jounce Therapeutics, Inc.
Consolidated Statements Stockholders’ Equity
(amounts in thousands)

Balance at December 31, 2018
Issuance of common stock from at the
market offering, net of issuance costs
Exercise of stock options
Vesting of restricted stock awards and
restricted stock units
Stock-based compensation expense
Other comprehensive income
Cumulative effect adjustment upon
adoption of ASC 842
Net income
Balance at December 31, 2019
Issuance of common stock from at the
market offering, net of issuance costs
Issuance of common stock under a stock
purchase agreement
Exercise of stock options
Vesting of restricted stock awards and
restricted stock units
Stock-based compensation expense
Other comprehensive loss
Net loss

Balance at December 31, 2020

Common Stock

Shares

Amount

Additional Paid-
In Capital

Accumulated Other
Comprehensive (Loss)
Income

Accumulated
Deficit

Total
Stockholders’
Equity

32,941  $

33  $

268,081  $

(78) $

(163,907) $

104,129 

448 
185 

164 
— 
— 

— 
— 
33,738 

2,074 

5,540 
128 

1 
— 

— 
— 
— 

— 
— 
34 

2 

6 
— 

3,510 
437 

27 
9,609 
— 

— 
— 
281,664 

14,511 

55,724 
600 

249 
— 
— 
— 
41,729  $

— 
— 
— 
— 
42  $

— 
9,771 
— 
— 
362,270  $

— 
— 

— 
— 
132 

— 
— 
54 

— 

— 
— 

— 
— 
(71)
— 
(17) $

— 
— 

— 
— 
— 

(75)
56,823 
(107,159)

— 

— 
— 

— 
— 
— 
(43,842)
(151,001) $

3,511 
437 

27 
9,609 
132 

(75)
56,823 
174,593 

14,513 

55,730 
600 

— 
9,771 
(71)
(43,842)
211,294 

The accompanying notes are an integral part of these consolidated financial statements.

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Jounce Therapeutics, Inc.
Consolidated Statements of Cash Flows
(amounts in thousands)

Operating activities:
Net (loss) income
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Stock-based compensation expense
Depreciation expense
Net amortization of premiums and discounts on investments
Changes in operating assets and liabilities:

Prepaid expenses and other current assets
Other non-current assets
Accounts payable
Accrued expenses and other current liabilities
Deferred revenue—related party
Other liabilities
Net cash used in operating activities

Investing activities:
Purchases of investments
Proceeds from maturities of investments
Purchases of property and equipment

Net cash provided by investing activities

Financing activities:
Proceeds from at the market offering, net of issuance costs
Proceeds from issuance of common under a stock purchase agreement, at fair value
Proceeds from exercise of stock options

Net cash provided by financing activities           

Net increase in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash, beginning of period

Cash, cash equivalents and restricted cash, end of period
Non-cash investing and financing activities:
Purchases of property and equipment in accounts payable and accrued expenses
Issuance costs in accounts payable and accrued expenses
Discount on common stock issued under a stock purchase agreement
Supplemental cash flow information:
Cash paid for lease liabilities
Cash paid for income taxes

Year Ended December 31,

2020

2019

$

(43,842) $

9,771 
3,401 
47 

(236)
(1,469)
(296)
3,047 
1,931 
(142)
(27,788)

(85,895)
137,287 
(94)
51,298 

14,412 
55,730 
600 
70,742 
94,252 
54,511 
148,763  $

—  $
33  $
(20,730) $

4,024  $
45  $

$

$
$
$

$
$

56,823 

9,609 
3,851 
(1,480)

(1,375)
(728)
(944)
1,983 
(97,872)
4 
(30,129)

(188,999)
221,366 
(985)
31,382 

3,645 
— 
437 
4,082 
5,335 
49,176 
54,511 

29 
134 
— 

4,270 
101 

The accompanying notes are an integral part of these consolidated financial statements.

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1. Nature of Business

Jounce Therapeutics, Inc.
Notes to Consolidated Financial Statements

Jounce Therapeutics, Inc. (the “Company”) is a clinical-stage immunotherapy company dedicated to transforming the treatment of cancer by developing
therapies that enable the immune system to attack tumors and provide long-lasting benefits to patients through a biomarker-driven approach. The Company
is subject to a number of risks similar to those of other clinical-stage immunotherapy companies, including dependence on key individuals; the need to
develop commercially viable products; competition from other companies, many of which are larger and better capitalized; and the need to obtain adequate
additional financing to fund the development of its products.

As of December 31, 2020, the Company had cash, cash equivalents, and investments of $213.2 million. The Company expects that its existing cash, cash
equivalents  and  investments  will  enable  it  to  fund  its  expected  operating  expenses  and  capital  expenditure  requirements  for  at  least  12  months  from
February 25, 2021, the filing date of this Annual Report on Form 10-K. The Company expects to finance its future cash needs through a combination of
equity or debt financings, collaborations, licensing arrangements and strategic alliances.

2. Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation and Consolidation

The  accompanying  consolidated  financial  statements  have  been  prepared  in  accordance  with  the  rules  and  regulations  of  the  Securities  and  Exchange
Commission (the “SEC”) and generally accepted accounting principles in the United States of America (“GAAP”) as found in the Accounting Standards
Codification  (“ASC”)  of  the  Financial  Accounting  Standards  Board  (“FASB”).  These  consolidated  financial  statements  include  the  accounts  of  Jounce
Therapeutics,  Inc.  and  its  wholly-owned  subsidiary,  Jounce  Mass  Securities,  Inc. All  intercompany  transactions  and  balances  have  been  eliminated  in
consolidation.

Segment Information

Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating
decision-maker  in  deciding  how  to  allocate  resources  and  assess  performance.  The  Company  and  the  Company’s  chief  operating  decision  maker,  the
Company’s chief executive officer, views the Company’s operations and manages its business as a single operating segment. The Company operates only in
the United States.

Use of Estimates

The  preparation  of  financial  statements  in  conformity  with  GAAP  requires  management  to  make  estimates  and  assumptions  that  affect  the  amounts
reported in the financial statements and accompanying notes. On an ongoing basis, the Company’s management evaluates its estimates which include, but
are not limited to, estimates related to revenue recognized under the Gilead License Agreement and Celgene Collaboration Agreement (including estimates
of  standalone  selling  prices  of  each  performance  obligation  and  internal  and  external  costs  expected  to  be  incurred  to  satisfy  performance  obligations),
accrued expenses, stock-based compensation expense and income taxes. In addition, in 2019, the Company made estimates to determine the discount rate
utilized  in  the  initial  application  of  ASC  Topic  842,  Leases  (“ASC  842”).  The  Company  bases  its  estimates  on  historical  experience  and  other  market
specific or other relevant assumptions it believes to be reasonable under the circumstances. Actual results could differ from those estimates.

Fair Value of Financial Instruments

ASC Topic 820, Fair Value Measurement (“ASC 820”) establishes a fair value hierarchy for instruments measured at fair value that distinguishes between
assumptions based on market data (observable inputs) and the Company’s own assumptions (unobservable inputs). Observable inputs are inputs that market
participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are
inputs that reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset or liability and are developed based
on the best information available in the circumstances.

ASC  820  identifies  fair  value  as  the  exchange  price,  or  exit  price,  representing  the  amount  that  would  be  received  to  sell  an  asset  or  paid  to  transfer  a
liability in an orderly transaction between market participants. As a basis for considering market participant assumptions in fair value measurements, ASC
820 establishes a three-tier fair value hierarchy that distinguishes between the following:

•

Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities.

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•

•

Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.

Level  3  inputs  are  unobservable  inputs  that  reflect  the  Company’s  own  assumptions  about  the  assumptions  market  participants  would  use  in
pricing the asset or liability. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the
fair value measurement.

To the extent that the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires
more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3.
A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

Cash Equivalents

Cash equivalents are highly-liquid investments that are readily convertible into cash with original maturities of three months or less when purchased. These
assets include investment in money market funds that invests in U.S. Treasury obligations.

Investments

Short-term  investments  consist  of  investments  with  maturities  greater  than  ninety  days  and  less  than  one  year  from  the  balance  sheet  date.  Long-term
investments  consist  of  investments  with  maturities  of  greater  than  one  year  that  are  not  expected  to  be  used  to  fund  current  operations.  The  Company
classifies  all  of  its  investments  as  available-for-sale  securities.  Accordingly,  these  investments  are  recorded  at  fair  value.  Realized  gains  and  losses,
amortization and accretion of discounts and premiums are included in “Other income, net”. Unrealized gains and losses on available-for-sale securities are
included in “Other comprehensive income” as a component of stockholders’ equity until realized.

Property and Equipment

Property  and  equipment  is  recorded  at  cost  and  consists  of  laboratory  equipment,  furniture  and  office  equipment,  computer  equipment,  leasehold
improvements. The Company capitalizes property and equipment that is acquired for research and development activities and that has alternate future use.
Expenditures  for  maintenance  and  repairs  are  recorded  to  expense  as  incurred,  whereas  major  betterments  are  capitalized  as  additions  to  property  and
equipment.  Leasehold  improvements  are  depreciated  over  the  lesser  of  their  useful  life  or  the  term  of  the  lease.  Depreciation  is  calculated  over  the
estimated useful lives of the assets using the straight-line method.

Impairment of Long-lived Assets

The Company reviews its property and equipment whenever events or changes in circumstances indicate that the carrying value of certain assets might not
be recoverable and recognizes an impairment loss when it is probable that an asset’s realizable value is less than the carrying value.

Leases

Effective January 1, 2019, the Company adopted ASC 842. In adopting ASC 842, the Company elected to utilize a package of practical expedients under
which an entity need not reassess whether any expired or existing contracts are or contain leases, the lease classification for any expired or existing leases
or initial direct costs for any existing leases. The Company also elected a practical expedient whereby an entity can utilize hindsight in determining the
lease term, including options to extend or terminate the lease. Finally, although separation of lease and non-lease components is required under ASC 842,
the Company elected a practical expedient to not separate lease and non-lease components and rather accounts for lease and non-lease components together
as a single lease component.

At the inception of an arrangement, the Company determines whether the arrangement is or contains a lease based on the unique facts and circumstances
present in the arrangement. Leases with a term greater than one year are recognized on the balance sheet as right-of-use assets and short-term and long-term
lease liabilities, as applicable. The Company does not recognize leases with terms of one year or less on the balance sheet. Options to renew a lease are not
included in the Company’s initial lease term assessment unless there is reasonable certainty that the Company will renew. The Company monitors its plans
to renew its material leases on a quarterly basis.

Operating  lease  liabilities  and  their  corresponding  right-of-use  assets  are  recorded  based  on  the  present  value  of  lease  payments  over  the  expected
remaining lease term. Certain adjustments to the right-of-use asset may be required for items such as

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incentives  received.  The  interest  rate  implicit  in  lease  contracts  is  typically  not  readily  determinable.  As  a  result,  the  Company  utilizes  its  incremental
borrowing rate (“IBR”), which reflects the fixed rate at which the Company could borrow on a collateralized basis the amount of the lease payments in the
same currency, for a similar term, and in a similar economic environment.

The Company subsequently measures its lease liability at the present value of remaining lease payments, discounted using the IBR for the lease. The right-
of-use asset is subsequently measured at the amount of the lease liability, adjusted for prepaid or accrued lease payments and the remaining balance of lease
incentives received. The Company recognizes operating lease expense on a straight-line basis over the lease term.

Revenue Recognition

The Company recognizes revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”). Under ASC 606, an entity
recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration that the entity expects to
receive in exchange for those goods or services. In applying ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a
customer; (ii) identify the promises and performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to
the performance obligations in the contract; and (v) recognize revenue when (or as) the Company satisfies the performance obligations. The Company only
applies the five-step model to contracts when it is probable that it will collect the consideration to which it is entitled in exchange for the goods or services
it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or
services promised within each contract, determines those that are performance obligations and assesses whether each promised good or service is distinct.
The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the
performance obligation is satisfied. As part of the assessment, the Company must develop assumptions that require judgment to determine the standalone
selling  price  for  each  performance  obligation  identified  in  the  contract. The  Company  uses  key  assumptions  to  determine  the  standalone  selling  price,
which may include reimbursement rates for personnel costs, development timelines and probabilities of regulatory success. The Company does not assess
whether a contract has a significant financing component if the expectation at contract inception is that the period between payment by the customer and
the transfer of promised goods or services to the customer will be one year or less.

Arrangements that include upfront payments may require deferral of revenue recognition to a future period until obligations under these arrangements are
fulfilled. The event-based milestone payments represent variable consideration, and the Company uses the “most likely amount” method to estimate this
variable  consideration.  Given  the  high  degree  of  uncertainty  around  the  occurrence  of  these  events,  the  Company  determined  the  milestone  and  other
contingent amounts to be fully constrained until the uncertainty associated with these payments is resolved. Revenue will be recognized from sales-based
royalty payments when or as the sales occur. The Company will re-evaluate the transaction price in each reporting period as uncertain events are resolved
and other changes in circumstances occur. See Note 3, “License and Collaboration Revenue”, for further information on the Company’s application of ASC
606.

Research and Development Expenses

Expenditures relating to research and development are expensed as incurred. Research and development expenses include external expenses incurred under
arrangements with third parties, academic and non-profit institutions and consultants; salaries and personnel-related costs, including non-cash stock-based
compensation  expense;  license  fees  to  acquire  in-process  technology  and  other  expenses,  which  include  direct  and  allocated  expenses  for  laboratory,
facilities  and  other  costs.  Non‑refundable  advance  payments  for  goods  and  services  that  will  be  used  in  future  research  and  development  activities  are
expensed when the activity has been performed or when the goods have been received rather than when the payment is made.

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As  part  of  the  process  of  preparing  the  consolidated  financial  statements,  the  Company  is  required  to  estimate  its  accrued  research  and  development
expenses as of each balance sheet date. In accruing service fees, the Company estimates the time period over which services will be performed and the
level of effort to be expended in each period. This process involves reviewing open contracts and purchase orders, communicating with internal personnel
to identify services that have been performed on the Company’s behalf and estimating the level of service performed and the associated cost incurred for
the service when the Company has not yet been invoiced or otherwise notified of the actual cost. The Company periodically confirms the accuracy of its
estimates with its service providers and makes adjustments if necessary. The majority of the Company’s service providers invoice monthly in arrears for
services performed or when contractual milestones are met. The financial terms of agreements with these service providers are subject to negotiation, vary
from  contract-to-contract  and  may  result  in  uneven  payment  flows.  In  circumstances  where  amounts  have  been  paid  in  excess  of  costs  incurred,  the
Company records a prepaid expense.

Intellectual Property Expenses

The  Company  expenses  costs  associated  with  intellectual  property-related  matters  as  incurred  and  classifies  such  costs  as  general  and  administrative
expenses within the consolidated statements of operations and comprehensive (loss) income.

Stock-based Compensation

The  Company  accounts  for  stock-based  payments  in  accordance  with  ASC  Topic  718,  Compensation—Stock Compensation.  This  guidance  requires  all
stock-based payments to employees, including grants of employee stock options, restricted stock awards (“RSAs”) and restricted stock units (“RSUs”), to
be recognized as expense in the consolidated statements of operations and comprehensive (loss) income based on their grant date fair values. For stock
options granted to employees and to members of the Company’s board of directors for their services on the board of directors, the Company estimates the
grant date fair value of each stock option using the Black-Scholes option-pricing model. For RSUs and RSAs granted to employees, the Company estimates
the grant date fair value of each award using intrinsic value, which is based on the value of the underlying common stock less any purchase price. For
stock-based payments subject to service-based vesting conditions, the Company recognizes stock-based compensation expense equal to the grant date fair
value of stock-based payment on a straight-line basis over the requisite service period. 

The Black‑Scholes option pricing model requires the input of certain subjective assumptions, including (i) the calculation of expected term of the stock-
based payment, (ii) the risk‑free interest rate, (iii) the expected stock price volatility and (iv) the expected dividend yield. The Company uses the simplified
method as proscribed by SEC Staff Accounting Bulletin No. 107 to calculate the expected term for stock options granted to employees as the Company
does  not  have  sufficient  historical  exercise  data  to  provide  a  reasonable  basis  upon  which  to  estimate  the  expected  term.  The  Company  determines  the
risk‑free interest rate based on a treasury instrument whose term is consistent with the expected term of the stock options. Because there had been no public
market for the Company’s common stock prior to the Company’s initial public offering (“IPO”), there is a lack of Company‑specific historical and implied
volatility data. Accordingly, the Company bases its estimates of expected volatility on the historical volatility of a group of publicly-traded companies with
similar  characteristics  to  itself,  including  stage  of  product  development  and  therapeutic  focus  within  the  life  sciences  industry.  Historical  volatility  is
calculated over a period of time commensurate with the expected term of the stock-based payment. The Company uses an assumed dividend yield of zero
as the Company has never paid dividends on its common stock, nor does it expect to pay dividends on its common stock in the foreseeable future. The
Company accounts for forfeitures of all stock-based payments when such forfeitures occur.

Income Taxes

Income taxes are recorded in accordance with ASC Topic 740, Income Taxes, which provides for deferred taxes using an asset and liability approach. The
Company  recognizes  deferred  tax  assets  and  liabilities  for  the  expected  future  tax  consequences  of  events  that  have  been  included  in  the  consolidated
financial statements or tax returns. Deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases
of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. A valuation allowance against deferred
tax assets is recorded if, based on the weight of the available evidence, it is more likely than not that some or all of the deferred tax assets will not be
realized.

The  Company  accounts  for  uncertain  tax  positions  using  a  more-likely-than-not  threshold  for  recognizing  and  resolving  uncertain  tax  positions.  The
evaluation  of  uncertain  tax  positions  is  based  on  factors,  including,  but  not  limited  to,  changes  in  the  law,  the  measurement  of  tax  positions  taken  or
expected to be taken in tax returns, the effective settlement of matters subject to audit, new audit activity and changes in facts or circumstances related to a
tax position.

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Comprehensive (Loss) Income

Comprehensive (loss) income is comprised of net (loss) income and other comprehensive income. Other comprehensive income for all periods presented
consists solely of unrealized gains on available-for-sale securities.

Net (Loss) Income per Share

Basic  net  (loss)  income  per  share  is  calculated  based  upon  the  weighted-average  number  of  common  shares  outstanding  during  the  period,  excluding
outstanding stock options and RSAs and RSUs that have been issued but are not yet vested. Diluted net (loss) income per share is calculated based upon the
weighted-average  number  of  common  shares  outstanding  during  the  period  plus  the  dilutive  impact  of  weighted-average  common  equivalent  shares
outstanding during the period. The potentially dilutive shares of common stock resulting from the assumed exercise of outstanding stock options and the
assumed vesting of RSAs and RSUs are determined under the treasury stock method.

Concentrations of Credit Risk and Off-Balance Sheet Risk

Financial instruments that potentially expose the Company to concentrations of credit risk primarily consist of cash, cash equivalents and investments. The
Company maintains its cash and cash equivalent balances with high-quality financial institutions and, consequently, the Company believes that such funds
are  subject  to  minimal  credit  risk.  The  Company’s  cash  equivalents  and  investments  are  comprised  of  money  market  funds  that  are  invested  in  U.S.
Treasury obligations, corporate debt securities, U.S. Treasury obligations and government agency securities. Credit risk in these securities is reduced as a
result of the Company’s investment policy to limit the amount invested in any single issuer and to only invest in securities of a high credit quality. 

The Company has no significant off-balance sheet risk such as foreign exchange contracts, option contracts or other foreign hedging arrangements.

Recently Adopted Accounting Pronouncements

In  August  2018,  the  FASB  issued  Accounting  Standards  Updates  (“ASU”)  2018-13,  Fair  Value  Measurement  (Topic  820):  Disclosure  Framework—
Changes to the Disclosure Requirements for Fair Value Measurement, which eliminates, adds and modifies certain disclosure requirements for fair value
measurements.  This  guidance  became  effective  for  fiscal  years  beginning  after  December  15,  2019,  including  interim  periods  within  those  fiscal  years.
Accordingly, the Company adopted ASU 2018-13 effective January 1, 2020, and there was no impact to the condensed consolidated financial statements
due to the adoption of this guidance.

In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for
Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This guidance aligns the requirements for capitalizing
implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to
develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of
a hosting arrangement that is a service contract is not affected. This guidance became effective for fiscal years beginning after December 15, 2019,
including interim periods within those fiscal years. The amendments in this update are able to be applied either retrospectively or prospectively to all
implementation costs incurred after the date of adoption. Accordingly, the Company adopted ASU 2018-15 effective January 1, 2020, and it elected to
apply this guidance on a prospective basis. There was no impact to the condensed consolidated financial statements due to the adoption of this guidance.

In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606,
which clarifies that certain transactions between participants in a collaborative arrangement should be accounted for under ASC Topic 606, Revenue from
Contracts with Customers (“ASC 606”) when the counterparty is a customer. In addition, ASU 2018-18 adds unit-of-account guidance to ASC Topic 808,
Collaborative Arrangements, in order to align this guidance with ASC 606 and also precludes an entity from presenting consideration from a transaction in
a collaborative arrangement as revenue from contracts with customers if the counterparty is not a customer for that transaction. This guidance became
effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Accordingly, the Company adopted ASU
2018-18 effective January 1, 2020, and there was no impact to the condensed consolidated financial statements due to the adoption of this guidance.

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In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which eliminates certain
exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim
period and the recognition of deferred tax liabilities when investment ownership changes. In addition, ASU 2019-12 simplifies the accounting for the
interim period effects of changes in tax laws or rates and transactions that result in a step-up in the tax basis of goodwill. While this guidance is effective
for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years, early adoption is permitted. Consequently, the
Company elected to early adopt ASU 2019-12 effective January 1, 2020. Due to the adoption of this guidance, the Company did not record an intraperiod
tax allocation to other comprehensive income for the three months ended March 31, 2020. In accordance with ASU 2019-12, the Company has applied the
new provisions related to the intraperiod tax allocation on a prospective basis.

Recent Accounting Pronouncements, Not Yet Adopted

In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.
This  standard  requires  that  credit  losses  be  reported  using  an  expected  losses  model  rather  than  the  incurred  losses  model  that  is  currently  used,  and  it
establishes additional disclosure requirements related to credit risks. For available-for-sale debt securities with expected credit losses, this standard now
requires allowances to be recorded instead of reducing the amortized cost of the investment. This guidance was originally effective for annual reporting
periods  beginning  after  December  15,  2019,  including  interim  periods  within  those  annual  reporting  periods,  and  early  adoption  was  permitted.  In
November 2019, the FASB subsequently issued ASU 2019-10, Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815),
and  Leases  (Topic  842):  Effective  Dates,  whereby  the  effective  date  of  this  standard  for  smaller  reporting  companies  was  deferred  to  annual  reporting
periods  beginning  after  December  15,  2022,  including  interim  periods  within  those  annual  reporting  periods,  and  early  adoption  is  still  permitted.
Accordingly, the Company will now adopt this standard effective January 1, 2023, and it is currently evaluating the potential impact that ASU 2016-13 may
have on the consolidated financial statements.

3.     License and Collaboration Revenue

Gilead License Agreement

On August 31, 2020, the Company and Gilead entered into an exclusive license agreement (the “Gilead License Agreement”) to license the Company’s
JTX-1811  program  to  Gilead.  Concurrently  with  the  license  agreement,  the  Company  and  Gilead  entered  into  a  stock  purchase  agreement  (the  “Stock
Purchase Agreement”) and a registration rights agreement (the “Registration Rights Agreement”, and together with the License Agreement and the Stock
Purchase  Agreement,  the  “Transaction  Agreements”).  The  transactions  with  Gilead  were  subject  to  review  under  the  Hart-Scott  Rodino  Antitrust
Improvements Act of 1976 and other customary closing conditions, and became effective on October 16, 2020, the closing date of the agreement. Pursuant
to the Gilead License Agreement, the Company granted to Gilead a worldwide and exclusive license to develop, manufacture and commercialize JTX-1811
and  certain  derivatives  thereof  (the  “Licensed  Products”).  Gilead  paid  the  Company  a  one-time,  non-refundable  upfront  payment  of  $85.0  million  in
October 2020. The Company will continue to develop JTX-1811 during the initial development term, which includes conducting activities defined within
the agreement to advance JTX-1811 through the clearance of an IND application or an earlier date specified by Gilead, at which time the program will be
transitioned to Gilead.

Milestone and Royalties

The Company is entitled to receive payments from Gilead upon the achievement of specified clinical, regulatory and sales milestones, including potential
clinical  development  and  regulatory  milestone  payments  up  to  an  aggregate  total  of  $510.0  million  and  potential  sales  milestone  payments  up  to  an
aggregate total of $175.0 million.

The Company is also eligible to receive tiered royalty payments based on a percentage of annual worldwide net sales ranging from the high-single digits to
mid-teens, based on future annual net sales of the Licensed Products, on a Licensed Product-by-Licensed Product and country-by-country basis.

Termination

Gilead may terminate the License Agreement for convenience, in its sole discretion, in its entirety or on a Licensed Product-by-Licensed Product or region-
by-region basis, at any time with prior written notice to the Company. Unless terminated earlier in accordance with its terms, the Gilead License Agreement
provides that it will expire (i) on an Licensed Product-by-Licensed

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Product and country-by-country basis on the date of the expiration of the royalty term with respect to such Licensed Product in such country and (ii) in its
entirety upon the expiration of all applicable royalty terms with respect to the Licensed Products in all countries, following which the applicable licenses
under the License Agreement will become fully paid-up, perpetual, irrevocable and royalty-free.

Accounting Analysis

Identification of the Contract(s)

The Company assessed the Gilead License Agreement and concluded that it represents a contract with a customer within the scope of ASC 606, Revenue
from  Contracts  with  Customers.  In  addition,  the  Company  determined  that  the  Gilead  License  Agreement  and  Stock  Purchase  Agreement  should  be
evaluated as a combined contract in accordance with ASC 606 given that the agreements were executed contemporaneously, negotiated as a package and
have the same commercial objective to provide funding to further the Company’s research and development activities.

Identification of Promises and Performance Obligations

The Company determined that the Gilead License Agreement contains the following promises: (i) delivery of a worldwide and exclusive license to develop,
manufacture and commercialize JTX-1811 (the “JTX-1811 License”), (ii) provision of certain research transition activities, specifically outlined within the
Gilead License Agreement, related to the advancement of JTX-1811 through the clearance of an IND application and transition of the JTX-1811 program to
Gilead (the “Research and Transition Services”), (iii) appointment of an individual to act as an alliance manager and primary point of contact for Gilead,
(iv) appointment of individuals to participate on the Joint Steering Committee (“JSC”), and (v) optional assistance by Jounce after completion of Research
and Transition Services upon the request of Gilead.

The Company assessed the above promises and concluded that each of the JTX-1811 License and Research and Transition Services is capable of being
distinct and distinct within the context of the Gilead License Agreement. Based upon this evaluation, the Company concluded that its promise to deliver the
JTX-1811 License and promise to perform Research and Transition Services represent separate performance obligations in the Gilead License Agreement.

The  Company  determined  that  the  appointment  of  an  individual  to  act  as  an  alliance  manager  and  primary  point  of  contact  for  Gilead,  participation  in
alliance management meetings and the appointment of individuals to participate on the JSC do not constitute the transfer of a good or service to Gilead and
as such, do not represent performance obligations under the contract.

Finally,  the  Company  assessed  Gilead’s  ability  to  request  optional  assistance  by  Jounce  after  completion  of  Research  and  Transition  Services  and
determined that it was both quantitatively and qualitatively immaterial in the context of the Gilead License Agreement. Accordingly, the Company did not
assess the optional assistance as a performance obligation.

Determination of Transaction Price

As  noted  above,  the  Company  received  a  non-refundable  upfront  payment  of  $85.0  million  upon  the  execution  of  the  Gilead  License  Agreement.  This
upfront payment represents an element of fixed consideration under the Gilead License Agreement.

The  Company  also  evaluated  as  possible  variable  consideration  the  milestones  and  royalties  discussed  above.  With  respect  to  clinical  development  and
regulatory milestones, based upon the high degree of uncertainty and risk associated with these potential payments, the Company concluded that all such
amounts should be fully constrained and are not included in the initial transaction price. As part of the evaluation of the constraint the Company considered
certain factors, including that receipt of such milestones is outside the control of the Company and the probability of success criteria is estimated. Each of
these variable consideration items was evaluated under the most-likely amount method. As for royalties and sales milestones, the Company determined that
the royalties and milestones relate solely to the JTX-1811 License, which is a license of intellectual property (“IP”). Accordingly, the Company did not
include  any  potential  royalty  or  sales  milestone  amounts  in  the  initial  transaction  price,  and  the  Company  will  not  recognize  revenue  related  to  these
royalties and sales milestones until the associated sales occur and relevant thresholds are met.

The Company assessed proceeds of $35.0 million received under the Stock Purchase Agreement and determined that the fair value of the equity component
was $55.7 million based on the closing price of $10.06 per share on October 16, 2020. Pursuant to the agreement, the Company sold 5,539,727 shares of
common  stock  for  aggregate  cash  consideration  of  $35.0  million,  or  $6.32  per  share,  which  is  equal  to  the  daily  volume  weighted  average  per  share
intraday price of the Common Stock on Nasdaq over the 30-trading day period ending on and including August 28, 2020 plus a 30% premium. As a result,
the Company

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determined that the gross proceeds of $35.0 million received under the Stock Purchase Agreement included a discount to the fair value of the Company’s
stock as of October 16, 2020 equal to $20.7 million. In accordance with ASC 606, the discount amount will be included in the transaction price for revenue
recognition, resulting in an initial transaction price of $64.3 million.

Allocation of Transaction Price to Performance Obligations

The Company allocated the transaction price to each performance obligation on a relative estimated standalone selling price basis. The Company developed
the estimated standalone selling price for the JTX-1811 License based on the present value of expected future cash flows associated with the license and
related clinical development and regulatory milestones. In developing such estimate, the Company applied judgement in determining the timing needed to
develop  the  Licensed  Product,  the  probability  of  success,  and  the  discount  rate.  The  Company  developed  the  estimated  standalone  selling  price  for  the
Research and Transition Services obligation based on the nature of the services to be performed and the Company’s best estimate of the length of time
required to perform the services necessary to achieve clearance of an IND application for the JTX-1811 program.

Recognition of Revenue

The Company determined that the JTX-1811 License is a functional license as the underlying IP has significant standalone functionality. In addition, the
Company determined that the JTX-1811 License represents a right to use certain of the Company’s IP as it exists at a point in time. Finally, the Company
determined that October 16, 2020 represents (i) the date at which the Company made available the IP to Gilead and (ii) the beginning of the period during
which Gilead is able to use and benefit from its right to use the IP. Based upon these considerations, the Company recognized $60.8 million in revenue
related to the JTX-1811 License performance obligation during the year ended December 31, 2020.

Further, the Company determined the input method under ASC 606 is the most appropriate method of revenue recognition for the Research and Transition
Services  performance  obligation.  The  method  of  measuring  progress  towards  delivery  of  the  services  incorporated  actual  internal  and  external  costs
incurred, relative to total internal and external costs expected to be incurred to satisfy the performance obligation. The period over which total costs were
estimated reflected the Company’s best estimate of the period over which it would perform the research and transition services to achieve clearance of an
IND application of the JTX-1811 program and transition the program to Gilead. Based upon these considerations, the Company recognized $1.6 million in
revenue related to the Research and Transition Services performance obligation during the year ended December 31, 2020.

The following table provides a summary of the transaction price allocated to each performance obligation, in addition to revenue activity during the period
(in thousands):

JTX-1811 License
Research and Transition Services

Totals

Transaction Price Allocated

Revenue Recognized - related
party
Year Ended December 31,
2020

Deferred Revenue - related
party

As of December 31, 2020

$

$

60,776  $
3,494 
64,270  $

60,776  $
1,563 
62,339  $

— 
1,931 
1,931 

As of December 31, 2020, the remaining amount of the transaction price allocated to the Research and Transition Services that was unsatisfied is expected
to be recognized in 2021 as services are performed.

Celgene License Agreement

On July 22, 2019, the Company entered into a License Agreement (the “Celgene License Agreement”) with Celgene Corporation (“Celgene”). Pursuant to
the Celgene License Agreement, the Company granted to Celgene a worldwide and exclusive license to develop, manufacture and commercialize JTX-
8064  and  certain  derivatives  thereof  (an  “Initial  Licensed  Compound”),  as  well  as  any  antibody  (other  than  the  Initial  Licensed  Compound)  or  other
biologic controlled by the Company as of July 22, 2019 that is specifically directed to the LILRB2 receptor (the “Licensed Compounds”), and Celgene paid
the Company a one-time, non-refundable upfront payment of $50.0 million.

As of November 2019, Celgene became a Bristol Myers Squibb company. As part of its Celgene integration process, Bristol Myers Squibb streamlined its
pipeline to address areas of overlap. As a result, Celgene provided the Company with a notice of

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termination and the Celgene License Agreement was terminated effective June 3, 2020 (the “Celgene License Agreement Termination Date”). As of the
Celgene License Agreement Termination Date, the Company has sole worldwide rights to JTX-8064, and all of the Company’s intellectual property rights
pertaining to JTX-8064 and licensed to Celgene were reacquired by the Company. No party had any further financial or service obligations to one another
beyond transition costs and efforts, which were completed during the year ended December 31, 2020.

Accounting Analysis

Identification of the Contract(s)

The Company assessed the Celgene License Agreement and concluded that it represents a contract with a customer within the scope of ASC 606.

Identification of Promises and Performance Obligations

The  Company  determined  that  the  Celgene  License  Agreement  contained  the  following  promises:  (i)  delivery  of  a  worldwide  and  exclusive  license  to
develop,  manufacture  and  commercialize  an  Initial  Licensed  Compound  and  the  Licensed  Compounds  (the  “JTX-8064  License”)  and  (ii)  provision  of
certain transition activities, specifically outlined within the Celgene License Agreement, related to the delivery of the JTX-8064 License (the “Transition
Activities”).

The Company also evaluated certain other optional activities outlined within the Celgene License Agreement and concluded that none conveyed a material
right to Celgene. Accordingly, these options were not considered to be promises within the Celgene License Agreement.

The Company assessed the above promises and concluded that the JTX-8064 License was both capable of being distinct and distinct within the context of
the Celgene License Agreement. The Company also assessed its promise to perform the Transition Activities and concluded that it was both quantitatively
and  qualitatively  immaterial  in  the  context  of  the  Celgene  License  Agreement.  Accordingly,  the  Company  did  not  assess  the  Transition  Activities  as  a
performance  obligation.  Based  upon  this  evaluation,  the  Company  concluded  that  its  promise  to  deliver  the  JTX-8064  License  represented  the  sole
performance obligation in the Celgene License Agreement.

Determination of Transaction Price

As noted above, the Company received a non-refundable upfront payment of $50.0 million upon the execution of the Celgene License Agreement. This
upfront payment represented an element of fixed consideration under the Celgene License Agreement.

The  Company  also  evaluated  as  possible  variable  consideration  clinical,  regulatory  and  sales  milestone  payments  and  royalties  that  the  Company  was
eligible to receive under the Celgene License Agreement. With respect to clinical and regulatory milestones, based upon the high degree of uncertainty and
risk associated with these potential payments, the Company concluded that all such amounts should be fully constrained and are not included in the initial
transaction price. As for royalties and sales milestones, the Company determined that the royalties and milestones related solely to the JTX-8064 License,
which is a license of intellectual property (“IP”). Accordingly, the Company did not include any potential royalty or sales milestone amounts in the initial
transaction  price,  and  the  Company  determined  it  would  not  recognize  revenue  related  to  these  royalties  and  sales  milestones  until  the  associated  sales
occurred and relevant thresholds were met.

Based upon the above considerations, the Company concluded that the initial transaction price associated with the Celgene License Agreement consisted
solely of the upfront payment of $50.0 million.

Allocation of Transaction Price to Performance Obligations

As the Company’s promise to deliver the JTX-8064 License represented the sole performance obligation in the Celgene License Agreement, the entirety of
the $50.0 million transaction price was allocated to this performance obligation.

Recognition of Revenue

The Company determined that the JTX-8064 License was a functional license as the underlying IP had significant standalone functionality. In addition, the
Company determined that the JTX-8064 License represented a right to use certain of the Company’s IP as it existed at a point in time. Finally, the Company
determined that July 22, 2019 represented (i) the date at which the Company made available the IP to Celgene and (ii) the beginning of the period during
which Celgene was able to use and benefit from its right to use the IP. Based upon these considerations, the Company recognized $50.0 million of license

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revenue  during  the  year  ended  December  31,  2019.  As  the  upfront  payment  was  non-refundable,  the  subsequent  termination  of  the  Celgene  License
Agreement had no impact on this revenue recognition. Up through the Celgene License Agreement Termination Date, the Company did not receive any
milestone or royalty payments.

Celgene Collaboration Agreement

In  July  2016,  the  Company  entered  into  a  Master  Research  and  Collaboration  Agreement  (the  “Celgene  Collaboration  Agreement”)  with  Celgene.  The
primary  goal  of  the  collaboration  was  to  co-develop  and  co-commercialize  innovative  biologic  immunotherapies  that  either  activate  or  suppress  the
immune system by binding to targets identified by leveraging the Company’s Translational Science Platform. Under the Celgene Collaboration Agreement,
the Company granted Celgene exclusive options to develop and commercialize the Company’s lead product candidate, vopratelimab, and up to four early-
stage programs, consisting of targets to be selected from a pool of certain B cell, T regulatory cell and tumor-associated macrophage targets. Additionally,
the  Company  granted  Celgene  an  exclusive  option  to  develop  and  commercialize  the  Company’s  product  candidate  JTX-4014,  an  anti-PD-1  antibody,
which, upon exercise of such option, would have been a shared program to be used by both parties in and outside of the collaboration. The Company and
Celgene terminated the Celgene Collaboration Agreement effective July 22, 2019.

The Company received a non-refundable upfront cash payment of $225.0 million in July 2016 upon the execution of the Celgene Collaboration Agreement.
The Company also received $36.1 million from the sale of 10,448,100 shares of Series B-1 convertible preferred stock upon the execution of a Series B-1
Preferred Stock Purchase Agreement with Celgene, which shares converted into 2,831,463 shares of common stock upon the completion of the IPO. If
Celgene had elected to exercise any of the program options, Celgene would have been required to pay the Company an option-exercise fee that varied by
program.  The  initial  research  term  of  the  collaboration  was  four  years,  which  could  have  been  extended,  at  Celgene’s  option,  annually  for  up  to  three
additional years.

Worldwide Development Cost and U.S. Operating Profit and Loss Sharing

Prior to Celgene exercising any of its options, the Company was responsible for all research and development activities under the Celgene Collaboration
Agreement. Upon the exercise of each program option, the parties would have entered into a co-development and co-commercialization agreement (the
“Co-Co  Agreements”)  or,  in  the  case  of  JTX-4014,  a  license  agreement  (the  “JTX-4014  License  Agreement”)  to  govern  the  development  and
commercialization of the applicable program. As part of the Celgene Collaboration Agreement, the parties agreed to the terms of the Co-Co Agreements
and the JTX-4014 License Agreement that would have been executed upon Celgene’s exercise of any option.

Milestones and Royalties

Under the Co-Co Agreements and the JTX-4014 License Agreement, Celgene would have been required to pay the Company for specified development,
regulatory and commercial milestones, if achieved, across all collaboration programs. Development milestones were payable on the initiation of certain
clinical trials, regulatory approval milestones were payable upon regulatory approval in the United States and outside the United States and commercial
milestones were payable upon achievement of specified aggregate product sales outside the United States for each program. The Company was also eligible
to receive royalties on product sales outside the United States.

Accounting Analysis

Identification of the Contract(s)

The Company assessed the Celgene Collaboration Agreement and concluded that it represented a contract with a customer within the scope of ASC 606.
The Company also concluded that each of the Co-Co Agreements and the JTX-4014 License Agreement, if any had been executed, would have represented
separate contracts apart from the Celgene Collaboration Agreement.

Identification of Promises and Performance Obligations

The  Company  determined  that  the  Celgene  Collaboration  Agreement  contained  the  following  promises:  (i)  research  and  development  services  for
vopratelimab (“Vopratelimab Research Services”), (ii) research and development services for JTX-4014 (“JTX-4014 Research Services”), (iii) research and
development  services  associated  with  the  Lead  Program  and  Other  Programs  (“Lead  and  Other  Programs  Research  Services”),  (iv)  research  services
associated  with  target  screening  (“Target  Screening  Services”),  (v)  non-transferable,  limited  sub-licensable  and  non-exclusive  licenses  to  use  the
Company’s

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intellectual property and the Company’s rights in the collaboration intellectual property to conduct certain activities, on a program-by-program basis (the
“Research Licenses”), (vi) various record-keeping and reporting requirements on a program-by-program basis, (vii) exclusivity provisions with respect to
each Collaboration Exclusive Target and biologics binding to such Collaboration Exclusive Targets and (viii) establishment of and participation in a joint
steering committee (the “JSC”) and a joint patent committee (the “JPC”). The Company also evaluated the six program options as well as the research term
extension options and concluded that none conveyed a material right to Celgene. Accordingly, neither the program options nor the research term extension
options were considered to be promises within the Celgene Collaboration Agreement.

The Company assessed the above promises and concluded that each of the Vopratelimab Research Services, JTX-4014 Research Services, Lead and Other
Programs Research Services and Target Screening Services were both capable of being distinct and distinct within the context of the Celgene Collaboration
Agreement. Therefore, the Company concluded that each of the Vopratelimab Research Services, JTX-4014 Research Services, Lead and Other Programs
Research Services and Target Screening Services represented separate performance obligations.

The  Company  determined  that  the  Research  Licenses  were  not  distinct  within  the  context  of  the  Celgene  Collaboration  Agreement  as  the  Research
Licenses allowed Celgene to evaluate the results of the research and development services performed by the Company and the right to perform its duties
under the Celgene Collaboration Agreement, but did not provide Celgene with any commercialization rights. Celgene could only benefit from the Research
Licenses in conjunction with the related research and development services. Accordingly, the Research Licenses related to vopratelimab, JTX-4014 and the
Lead and Other Programs were combined with their respective research and development services performance obligations.

Similarly, the Company also determined that the various record-keeping and reporting requirements related to each program and the exclusivity provisions
with respect to each Collaboration Exclusive Target and biologics binding to such Collaboration Exclusive Targets were not distinct within the context of
the  Celgene  Collaboration  Agreement.  Accordingly,  the  various  record-keeping  and  reporting  requirements  on  a  program-by-program  basis  and  the
exclusivity provisions with respect to each Collaboration Exclusive Target and biologics binding to such Collaboration Exclusive Targets were combined
with their respective research and development services performance obligations.

Finally, the Company assessed its participation in the JSC and the JPC and concluded that it was both quantitatively and qualitatively immaterial in the
context  of  the  Celgene  Collaboration  Agreement.  Accordingly,  the  Company  did  not  assess  its  participation  in  the  JSC  and  the  JPC  as  a  performance
obligation.

Determination of Transaction Price

As noted above, the Company received a non-refundable upfront payment of $225.0 million upon the execution of the Celgene Collaboration Agreement.
This  upfront  payment  represented  an  element  of  fixed  consideration  under  the  Celgene  Collaboration  Agreement.  Celgene  also  purchased  10,448,100
shares of Series B-1 convertible preferred stock (“Series B-1 Preferred Stock”) for gross proceeds of $36.1 million, which shares converted into 2,831,463
shares  of  common  stock  upon  the  completion  of  the  IPO.  The  Company  determined  the  shares  of  Series  B-1  Preferred  Stock  were  sold  at  fair  value.
Therefore, the proceeds from the issuance of Series B-1 Preferred Stock did not impact the transaction price to be allocated to the performance obligations.

The  Company  evaluated  as  possible  variable  consideration  the  milestones,  royalties,  development  cost  sharing  and  profit-sharing  provisions  discussed
above.  The  Company  concluded  that  none  of  these  items  represented  variable  consideration  under  the  Celgene  Collaboration  Agreement  as  all  such
amounts were dependent upon the execution of a related Co-Co Agreement or the JTX-4014 License Agreement. The Co-Co Agreements and the JTX-
4014 License Agreement, if any had been executed, would have represented separate contracts apart from the Celgene Collaboration Agreement.

The Company also considered the existence of any significant financing component within the Celgene Collaboration Agreement given its upfront payment
structure. Based upon this assessment, the Company concluded that any difference between the promised consideration and the cash selling price of the
services under the Celgene Collaboration Agreement arose for reasons other than the provision of financing, and the difference between those amounts was
proportional  to  the  reason  for  the  difference.  Accordingly,  the  Company  concluded  that  the  upfront  payment  structure  of  the  Celgene  Collaboration
Agreement did not result in the existence of a significant financing component.

Based upon the above considerations, the Company concluded that the transaction price associated with the Celgene Collaboration Agreement consisted
solely of the upfront payment of $225.0 million.

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Table of Contents

Allocation of Transaction Price to Performance Obligations

The Company allocated the transaction price to each performance obligation on a relative standalone selling price basis. For all performance obligations,
the Company determined the standalone selling price using estimates of the costs to perform the research and development services, including expected
internal and external costs for services and supplies, adjusted to reflect a reasonable profit margin. The total estimated cost of the research and development
services reflected the nature of the services to be performed and the Company’s best estimate of the length of time required to perform the services.

Recognition of Revenue

Prior  to  the  termination  of  the  Celgene  Collaboration  Agreement,  the  Company  was  recognizing  revenue  over  time  as  the  services  related  to  each
performance  obligation  were  rendered.  The  Company  concluded  that  an  input  method  under  ASC  606  was  a  representative  depiction  of  the  transfer  of
services under the Celgene Collaboration Agreement. The method of measuring progress towards delivery of the services incorporated actual internal and
external costs incurred, relative to total internal and external costs expected to be incurred to satisfy the performance obligations. The period over which
total costs were estimated reflected the Company’s estimate of the period over which it would perform the research and development services to deliver a
pre-defined data package to Celgene for each program subject to an option. The Company was recognizing revenue for each performance obligation over
periods ranging from twelve months to four years. Changes in estimates of total internal and external costs expected to be incurred were recognized in the
period of change as a cumulative catch-up adjustment.

For  the  year  ended  December  31,  2019,  the  Company  recognized  collaboration  revenue  of  $97.9  million  under  the  Celgene  Collaboration  Agreement
related to the $225.0 million upfront payment received in 2016. Following the termination of the Celgene Collaboration Agreement, which was effective
July  22,  2019,  the  Company  had  no  further  performance  obligations.  Accordingly,  all  remaining  deferred  revenue  related  to  the  Celgene  Collaboration
Agreement was recognized during the year ended December 31, 2019. Up through the termination of the Celgene Collaboration Agreement, the Company
did not receive any option exercise, research term extension, milestone or royalty payments.

4.    Fair Value Measurements

The Company measures the fair value of money market funds, U.S. Treasuries and government agency securities based on quoted prices in active markets
for identical securities. Investments also include corporate debt securities which are valued either based on recent trades of securities in inactive markets or
based on quoted market prices of similar instruments and other significant inputs derived from or corroborated by observable market data.

The  carrying  amounts  reflected  in  the  consolidated  balance  sheets  for  cash,  prepaid  expenses  and  other  current  assets,  accounts  payable  and  accrued
expenses approximate their fair values, due to their short-term nature.

Assets measured at fair value on a recurring basis as of December 31, 2020 were as follows (in thousands):

Quoted Prices in
Active Markets for
Identical Assets
(Level 1)

Total

Significant Other
Observable Inputs
(Level 2)

Significant
Unobservable Inputs
(Level 3)

Money market funds, included in cash equivalents
Investments:

Corporate debt securities
Government agency securities

Totals

$

$

147,492  $

147,492  $

—  $

63,691 
2,005 
213,188  $

— 
— 
147,492  $

63,691 
2,005 
65,696  $

— 

— 
— 
— 

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Assets measured at fair value on a recurring basis as of December 31, 2019 were as follows (in thousands):

Quoted Prices in
Active Markets for
Identical Assets
(Level 1)

Total

Significant Other
Observable Inputs
(Level 2)

Significant
Unobservable Inputs
(Level 3)

Money market funds, included in cash equivalents
Investments:

Corporate debt securities
U.S. Treasuries
Government agency securities

Totals

$

$

50,242  $

50,242  $

—  $

48,300 
59,082 
12,820 
170,444  $

— 
59,082 
— 
109,324  $

48,300 
— 
12,820 
61,120  $

— 

— 
— 
— 
— 

There were no changes in valuation techniques during the years ended December 31, 2020 or 2019. There were no liabilities measured at fair value on a
recurring basis as of December 31, 2020 or 2019.

5.     Investments

Short-term  investments  consist  of  investments  with  maturities  greater  than  ninety  days  and  less  than  one  year  from  the  balance  sheet  date.  Long-term
investments  consist  of  investments  with  maturities  of  greater  than  one  year  that  are  not  expected  to  be  used  to  fund  current  operations.  The  Company
classifies  all  of  its  investments  as  available-for-sale  securities.  Accordingly,  these  investments  are  recorded  at  fair  value.  Realized  gains  and  losses,
amortization and accretion of discounts and premiums are included in other income, net. Unrealized gains and losses on available-for-sale securities are
included in other comprehensive income as a component of stockholders’ equity until realized.

Cash equivalents, short-term investments and long-term investments as of December 31, 2020 were comprised as follows (in thousands):

Amortized Cost

December 31, 2020
Unrealized Gains Unrealized Losses

Fair Value

Cash equivalents and short-term investments:

Money market funds, included in cash equivalents
Corporate debt securities
Government agency securities
Total cash equivalents and short-term investments

Long-term investments:

Corporate debt securities
Total long-term investments

Total cash equivalents and investments

147,492  $
56,985 
2,001 
206,478 

6,727 
6,727 
213,205  $

—  $
9 
4 
13 

— 
— 
13  $

—  $
(13)
— 
(13)

(17)
(17)
(30) $

147,492 
56,981 
2,005 
206,478 

6,710 
6,710 
213,188 

$

$

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Cash equivalents, short-term investments and long-term investments as of December 31, 2019 were comprised as follows (in thousands):

Cash equivalents and short-term investments:

Money market funds, included in cash equivalents
Corporate debt securities
U.S. Treasuries
Government agency securities
Total cash equivalents and short-term investments

Long-term investments:

Corporate debt securities
Total long-term investments

Total cash equivalents and investments

Amortized Cost

December 31, 2019
Unrealized Gains Unrealized Losses

Fair Value

$

$

50,242  $
46,695 
59,058 
12,796 
168,791 

1,599 
1,599 
170,390  $

—  $
8 
26 
24 
58 

2 
2 
60  $

—  $
(4)
(2)
— 
(6)

— 
— 
(6) $

50,242 
46,699 
59,082 
12,820 
168,843 

1,601 
1,601 
170,444 

As of December 31, 2020 and 2019, the aggregate fair value of securities that were in an unrealized loss position for less than twelve months was $28.3
million and $28.3 million, respectively. As of December 31, 2020 there were no securities that were in an unrealized loss position for more than twelve
months.  As  of  December  31,  2019,  the  aggregate  fair  value  of  securities  that  were  in  an  unrealized  loss  position  for  more  than  twelve  months  was
$2.0 million. As of December 31, 2020, the Company did not intend to sell, and would not be more likely than not required to sell, the securities in an
unrealized  loss  position  before  recovery  of  their  amortized  cost  bases.  Furthermore,  the  Company  determined  that  there  was  no  material  change  in  the
credit  risk  of  these  securities.  As  a  result,  the  Company  determined  it  did  not  hold  any  securities  with  any  other-than-temporary  impairment  as  of
December 31, 2020.

There were no realized gains and losses on available-for-sale securities during the year ended December 31, 2020 and 2019,

6.     Restricted Cash

As of both December 31, 2020 and 2019, the Company maintained non-current restricted cash of $1.3 million. This amount is included within “Other non-
current  assets”  in  the  accompanying  consolidated  balance  sheets  and  is  comprised  solely  of  a  letter  of  credit  required  pursuant  to  the  lease  for  the
Company’s corporate headquarters.

The following table provides a reconciliation of cash, cash equivalents and restricted cash that sums to the total of the same such amounts shown in the
consolidated statements of cash flows (in thousands):

Year Ended
December 31, 2020

Year Ended
December 31, 2019

Beginning of Period

End of Period

Beginning of Period

End of Period

Cash and cash equivalents
Restricted cash

Cash, cash equivalents and restricted cash

$

$

53,241  $
1,270 
54,511  $

147,493  $
1,270 
148,763  $

47,906  $
1,270 
49,176  $

53,241 
1,270 
54,511 

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7.     Property and Equipment, Net

Property and equipment, net as of December 31, 2020 and 2019 was comprised as follows (in thousands):

Laboratory equipment
Furniture and office equipment
Computer equipment

Leasehold improvements

Total property and equipment, gross

Less: accumulated depreciation

Total property and equipment, net

Estimated Useful Life (in
Years)
5
4
3
Shorter of useful life or
remaining lease term

December 31,

2020

2019

$

$

11,408  $
1,071 
1,528 

8,572 
22,579 
(15,243)

7,336  $

11,374 
1,071 
1,505 

8,572 
22,522 
(11,850)
10,672 

Depreciation expense for the years ended December 31, 2020 and 2019 was $3.4 million and $3.9 million, respectively.

8.     Accrued Expenses

Accrued expenses as of December 31, 2020 and 2019 were comprised as follows (in thousands):

Employee compensation and benefits
External research and professional services
Lab consumables and other

Total accrued expenses

9.   Common Stock and Preferred Stock

Common Stock

December 31,

2020

2019

$

$

6,825  $
4,855 
364 
12,044  $

5,147 
3,639 
121 
8,907 

The Company is authorized to issue 160,000,000 shares of common stock. Holders of common stock are entitled to one vote per share. Holders of common
stock are entitled to receive dividends, if and when declared by the Board of Directors.

On December 17, 2019, the Company entered into a Sales Agreement with Cowen and Company, LLC (“Cowen”) pursuant to which the Company may
offer and sell shares of its common stock with an aggregate offering price of up to $50.0 million under an “at the market” offering program (the “ATM
Offering”). The Sales Agreement provides that Cowen will be entitled to a sales commission equal to 3.0% of the gross sales price per share of all shares
sold under the ATM Offering.

The following table summarizes sales under the ATM Offering (net proceeds shown in thousands):

For the year ended December 31,
2019
2020

Total sales under the ATM Offering

Shares Sold

Net Proceeds

Average Selling Price

447,847  $

2,074,274 
2,522,121 $

3,510  $
14,513  $
18,023 

8.57 
7.23 

In January 2021, 3,156,200 shares were sold for net proceeds of $30.2 million. Consequently, the Company completed the sale of all available amounts
under the ATM Offering (Note 16).

Preferred Stock

The  Company  is  authorized  to  issue  5,000,000  shares  of  undesignated  preferred  stock  in  one  or  more  series.  As  of  December  31,  2020,  no  shares  of
preferred stock were issued or outstanding.

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Shares Reserved for Future Issuance

As of December 31, 2020 and 2019, the Company had reserved for future issuance the following number of shares of common stock (in thousands):

Shares reserved for vesting of restricted stock awards
Shares reserved for vesting of restricted stock units
Shares reserved for exercises of outstanding stock options
Shares reserved for future issuances under the 2017 Stock Option and Incentive Plan

Total shares reserved for future issuance

10.   Stock-based Compensation

2013 Stock Option and Grant Plan

December 31,

2020

2019

— 
588 
6,586 
1,284 
8,458 

— 
460 
5,735 
1,288 
7,483 

In February 2013, the board of directors adopted and the Company’s stockholders approved the 2013 Stock Option and Grant Plan (the “2013 Plan”), as
amended and restated, under which it could grant incentive stock options (“ISOs”), non-qualified stock options, RSAs and RSUs to eligible employees,
officers, directors, and consultants. The 2013 Plan was subsequently amended in January 2015, April 2015, July 2015, March 2016 and October 2016 to
allow for the issuance of additional shares of common stock.

2017 Stock Option and Incentive Plan

In January 2017, the board of directors adopted and the Company’s stockholders approved the 2017 Stock Option and Incentive Plan (the “2017 Plan”),
which  became  effective  immediately  prior  to  the  effectiveness  of  the  Company’s  IPO.  Upon  the  adoption  of  the  2017  Plan,  no  further  awards  will  be
granted under the 2013 Plan.

The  2017  Plan  provides  for  the  grant  of  ISOs,  non-qualified  stock  options,  RSAs,  RSUs,  stock  appreciation  rights  and  other  stock-based  awards.  The
Company’s employees, officers, directors and consultants and advisors are eligible to receive awards under the 2017 Plan. The terms of awards, including
vesting requirements, are determined by the Board of Directors, subject to the provisions of the 2017 Plan.

The Company initially registered 1,753,758 shares of common stock under the 2017 Plan, which was comprised of (i) 1,510,000 shares of common stock
reserved  for  issuance  under  the  2017  Plan,  plus  (ii)  243,758  shares  of  common  stock  originally  reserved  for  issuance  under  the  2013  Plan  that  became
available for issuance under the 2017 Plan upon the completion of the Company’s IPO. The 2017 Plan also provides that an additional number of shares
will automatically be added to the shares authorized for issuance under the 2017 Plan on January 1, 2018 and each January 1  thereafter. The number of
shares added each year will be equal to the lesser of (i) 4% of the outstanding shares on the immediately preceding December 31  or (ii) such amount as
determined  by  the  compensation  committee  of  the  board  of  directors.  Effective  January  1,  2019  and  2020,  1,317,935  and  1,349,526  additional  shares,
respectively, were automatically added to the shares authorized for issuance under the 2017 Plan.

st

st

As of December 31, 2020, there were 1,283,871 shares available for future issuance under the 2017 Plan.

2017 Employee Stock Purchase Plan

In January 2017, the board of directors adopted and the Company’s stockholders approved the 2017 Employee Stock Purchase Plan (the “2017 ESPP”),
which became effective upon the closing of the Company’s IPO. The Company initially reserved 302,000 shares of common stock for future issuance under
the 2017 ESPP. The 2017 ESPP also provides that an additional number of shares will automatically be added to the shares authorized for issuance under
the 2017 ESPP on January 1, 2018 and each January 1  thereafter through January 1, 2027. The number of shares added each year will be equal to the
lesser  of  (i)  1%  of  the  outstanding  shares  on  the  immediately  preceding  December  31 , (ii)  603,000  shares  or  (iii)  such  amount  as  determined  by  the
Compensation  Committee  of  the  Board  of  Directors.  Effective  January  1,  2019  and  2020,  329,483  and  337,381  additional  shares,  respectively,  were
automatically  added  to  the  shares  authorized  for  issuance  under  the  2017  ESPP.  No  offering  periods  under  the  2017  ESPP  had  been  initiated  as  of
December 31, 2020.

st  

st

F-21

 
 
Table of Contents

Stock-based Compensation Expense

Total  stock-based  compensation  expense  recognized  in  the  consolidated  statements  of  operations  and  comprehensive  (loss)  income  for  the  years  ended
December 31, 2020 and 2019 was as follows (in thousands):

Research and development
General and administrative

Total stock-based compensation expense

RSU Activity

Year Ended December 31,

2020

2019

$

$

4,242  $
5,529 
9,771  $

4,353 
5,256 
9,609 

The Company has also granted RSUs to its employees under the 2017 Plan. The following table summarizes RSU activity for the year ended December 31,
2020 (in thousands, except per share amounts):

Unvested as of December 31, 2019

Issued
Vested
Cancelled

Unvested as of December 31, 2020

RSUs

Weighted-Average Grant
Date Fair Value per
Share

460  $
420  $
(248) $
(44) $
588  $

5.61 
6.50 
6.54 
6.14 

5.82 

The aggregate fair value of RSUs vested during the year ended December 31, 2020, based upon the fair values of the stock underlying the RSUs on the day
of vesting, was $1.5 million. The aggregate fair value of RSUs vested during the year ended December 31, 2019, based upon the fair values of the stock
underlying the RSUs on the day of vesting, was $0.7 million.

As  of  December  31,  2020,  there  was  unrecognized  stock-based  compensation  expense  related  to  unvested  RSUs  of  $2.2  million,  which  the  Company
expects to recognize over a weighted-average period of approximately 1.7 years.

Stock Option Activity

The fair value of stock options granted to employees and directors during the years ended December 31, 2020 and 2019 was calculated on the date of grant
using the following weighted-average assumptions:

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

F-22

Year Ended December 31,

2020

2019

1.2 %
— %
6.0
72.3 %

2.2 %
— %
6.0
69.4 %

 
 
 
 
 
Table of Contents

Using the Black-Scholes option pricing model, the weighted-average grant date fair value of stock options granted to employees and directors during the
years ended December 31, 2020 and 2019 was $4.25 and $2.76 per share, respectively.

The following table summarizes changes in stock option activity during the year ended December 31, 2020 (in thousands, except per share amounts):

Outstanding at December 31, 2019

Granted
Exercised
Cancelled

Outstanding at December 31, 2020
Exercisable at December 31, 2020

Options

Weighted-Average
Exercise Price

5,735  $
1,230  $
(128) $
(251) $
6,586  $
4,586  $

8.76 
6.68 
4.67 
12.69 

8.30 
8.15 

Weighted-Average
Remaining Contractual
Term (in years)

Aggregate Intrinsic
Value

7.2 $

18,959 

6.5 $
5.8 $

13,110 
10,832 

The  aggregate  intrinsic  value  of  stock  options  exercised  during  the  years  ended  December  31,  2020  and  2019  was  $0.5  million  and  $0.6  million,
respectively.

As  of  December  31,  2020,  there  was  unrecognized  stock-based  compensation  expense  related  to  unvested  stock  options  of  $9.4  million,  which  the
Company expects to recognize over a weighted-average period of approximately 2.2 years.

11.   Income Taxes

The provision for income taxes for the years ended December 31, 2020 and 2019 was comprised as follows (in thousands):

Current taxes:

Federal
State
Total current taxes

Deferred taxes:

Federal
State
Total deferred taxes

Total provision for income taxes

Year Ended December 31,

2020

2019

$

$

—  $
14 
14 

— 
— 
— 
14  $

— 
46 
46 

— 
— 
— 
46 

F-23

 
 
 
 
 
 
 
 
 
Table of Contents

As part of Congress’s response to the COVID-19 pandemic, the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”), was signed into
United States law on March 27, 2020 and modifies certain provisions of the Tax Cuts and Jobs Act, enacted in 2017, with respect to net operating losses.
Under the CARES Act, the limitation on the deduction of net operating losses to 80% of annual taxable income is suspended for taxable years beginning
before January 1, 2021. The CARES Act did not have a material impact on the condensed consolidated financial statements.

A reconciliation of the federal statutory income tax rate to the Company’s effective tax rate is as follows:

Income tax computed at federal statutory tax rate
State taxes, net of federal benefit
Tax credit carryforwards
Permanent items
Change in valuation allowance
Other

Effective tax rate

Year Ended December 31,

2020

2019

21.0 %
4.2 %
7.8 %
(12.4)%
(20.4)%
(0.2)%
— %

21.0 %
4.8 %
(5.4)%
1.1 %
(21.4)%
— %
0.1 %

The  principal  components  of  the  Company’s  deferred  tax  assets  and  liabilities  as  of  December  31,  2020  and  2019  were  comprised  as  follows  (in
thousands):

Deferred tax assets:

Net operating loss carryforwards
Tax credit carryforwards
Deferred revenue
Operating lease liability
Intangibles
Accrued expenses and other
Unrealized loss on available-for-sale securities
Depreciation
Stock-based compensation
Total deferred tax assets

Less: valuation allowance
Net deferred tax assets

Deferred tax liabilities:

Section 481(a) method change
Operating lease right-of-use asset
Depreciation
Total deferred tax liabilities

Net deferred taxes

December 31,

2020

2019

$

22,717  $
21,387 
528 
4,614 
785 
1,838 
17 
314 
4,031 
56,231 
(52,172)
4,059 

— 
(4,059)
— 
(4,059)

$

—  $

33,008 
17,185 
— 
5,407 
519 
1,358 
17 
— 
3,376 
60,870 
(43,219)
17,651 

(12,827)
(4,812)
(12)
(17,651)
— 

As of December 31, 2020, the Company had federal and state net operating loss (“NOL”) carryforwards of $82.2 million and $86.3 million, respectively.
Federal NOLs generated through the year ended December 31, 2017 expire at various dates from 2032 through 2037, and federal NOLs generated in years
beginning after December 31, 2017 may be carried forward indefinitely. State NOLs expire at various dates from 2035 through 2038. As of December 31,
2020, the Company had federal research and development tax credit carryforwards of $16.1 million which expire at various dates from 2032 through 2040.
In addition, as of December 31, 2020, the Company had state research and development and investment tax credit carryforwards of $6.6 million and $0.1
million, respectively. The state research and development tax credit carryforwards expire at various dates from 2029 through 2035 and the state investment
tax credit carryforwards expire at various dates from 2021 through 2023.

Management  has  evaluated  the  positive  and  negative  evidence  bearing  upon  the  realizability  of  its  deferred  tax  assets,  which  primarily  pertain  to  NOL
carryforwards, tax credit carryforwards, the Company’s operating lease liability and stock-based

F-24

 
 
 
 
 
Table of Contents

compensation. Management has determined that it is more likely than not that the Company will not realize the benefits of its deferred tax assets, and as a
result, a valuation allowance of $52.2 million has been established at December 31, 2020. The increase in the valuation allowance of $9.0 million during
the year ended December 31, 2020 was primarily due to the reduction in the deferred tax liability that was recorded as of December 31, 2019 related to the
Company’s Internal Revenue Code Section 481(a) method change for revenue recognition under the Celgene Collaboration Agreement. The deferred tax
liability reversed during the year ended December 31, 2020 and is no longer available as a source of future income.

NOL and tax credit carryforwards are subject to review and possible adjustment by the Internal Revenue Service (“IRS”) and may become subject to an
annual limitation in the event of certain cumulative changes in the ownership interest of significant shareholders over a three-year period in excess of 50%
as defined under Sections 382 and 383 in the IRC. This could limit the amount of tax attributes that can be utilized annually to offset future taxable income
or tax liabilities. The amount of the annual limitation is determined based on the Company’s value immediately prior to the ownership change. An IRC
Section 382 study, completed in August 2016, identified three previous ownership changes for purposes of IRC Section 382. As a result of these ownership
changes, the Company’s NOL and tax credit carryforwards allocable to the periods preceding each such ownership change are subject to limitations under
IRC Section 382. No additional ownership changes were identified in a study completed in May 2020. Subsequent ownership changes may further affect
the limitation in future years.

The  Company  had  no  unrecognized  tax  benefits  as  of  either  December  31,  2020  or  2019.  During  the  year  ended  December  31,  2017,  the  Company
completed a study of its research and development credit carryforwards generated during the years ended December 31, 2016 and 2015. The Company has
not conducted a study of its research and development credit carryforwards generated during any subsequent years. This study may result in an adjustment
to the Company’s research and development credit carryforwards; however, until a study is completed and any adjustment is known, no amounts are being
presented as an uncertain tax position. A full valuation allowance has been provided against the Company’s research and development credit carryforwards,
and  if  an  adjustment  is  required,  this  adjustment  would  be  offset  by  an  adjustment  to  the  valuation  allowance.  Thus,  there  would  be  no  impact  to  the
consolidated statements of operations and comprehensive (loss) income if an adjustment were required.

Interest  and  penalty  charges,  if  any,  related  to  income  taxes  would  be  classified  as  a  component  of  the  provision  for  income  taxes  in  the  consolidated
statements  of  operations  and  comprehensive  (loss)  income.  As  of  December  31,  2020,  the  Company  has  not  incurred  any  material  interest  or  penalty
charges.

The Company files income tax returns in the United States federal tax jurisdiction and the Massachusetts state tax jurisdiction. Since the Company is in a
loss  carryforward  position,  it  is  generally  subject  to  examination  by  federal  and  state  tax  authorities  for  all  tax  years  in  which  a  loss  carryforward  is
available.

12.   Related-party Transactions

In July 2019, the Company entered into the Celgene License Agreement under which it received a non-refundable upfront payment of $50.0 million from
Celgene. Previously, in July 2016, the Company entered into the Celgene Collaboration Agreement and a Series B-1 Preferred Stock Purchase Agreement
with Celgene. Under the Celgene Collaboration Agreement, the Company received a non-refundable upfront payment of $225.0 million. Under the Series
B-1 Preferred Stock Purchase Agreement, Celgene purchased 10,448,100 shares of Series B-1 Preferred Stock for $36.1 million. These shares of Series B-1
Preferred  Stock  converted  into  2,831,463  shares  of  common  stock  upon  the  completion  of  the  Company’s  IPO.  In  addition,  an  affiliate  of  Celgene
purchased 625,000 shares of the Company’s common stock in the IPO at the public offering price of $16.00 per share for a total of $10.0 million. As of
December 31, 2020, the Company had recorded no reimbursable expenses due to or from Celgene. As of December 31, 2019, the Company had recorded
$0.7  million  of  reimbursement  expenses  due  from  Celgene  within  prepaid  expenses  and  other  current  assets  in  the  accompanying  consolidated  balance
sheets.

As discussed within Note 3, “License and Collaboration Revenue”, BMS completed its acquisition of Celgene in November 2019, and Celgene is now a
wholly-owned subsidiary of BMS.

In August 2020, the Company entered into the Gilead License Agreement and Stock Purchase Agreement under which it received a non-refundable upfront
payment  of  $85.0  million  and  cash  consideration  of  $35.0  million  for  Gilead’s  purchase  of  5,539,727  shares  of  the  Company’s  common  stock.  As  of
December 31, 2020, the Company has recognized $62.3 million in revenue under these arrangements and has recorded deferred revenue of $1.9 million in
the accompanying consolidated balance sheets. As of December 31, 2020, the Company had recorded $0.1 million of reimbursement expenses due from
Gilead within prepaid expenses and other current assets in the accompanying consolidated balance sheets.

F-25

Table of Contents

13.   Commitments and Contingencies

Corporate Headquarters Lease

In  November  2016,  the  Company  entered  into  an  operating  lease  agreement  (the  “Corporate  Headquarters  Lease”)  to  occupy  51,000  square  feet  of
laboratory  and  office  space  in  Cambridge,  Massachusetts.  This  facility  serves  as  the  Company’s  corporate  headquarters.  The  lease  term  began  on
November 1, 2016 and extends to March 31, 2025. The Company has the option to extend the lease term for one consecutive five-year period, at the market
rate, by giving the landlord written notice of its election to exercise the extension at least twelve months prior to the original expiration of the lease term.
The Company provided the landlord with a security deposit in the form of a letter of credit in the amount of $1.3 million, which is recorded as restricted
cash  and  included  within  “Other  non-current  assets”  in  the  consolidated  balance  sheets.  The  Corporate  Headquarters  Lease  also  provided  the  Company
with a tenant improvement allowance of $0.5 million. Leasehold improvements related to this facility are being amortized over the shorter of their useful
life or the lease term.

Accounting under ASC 842

As  a  result  of  the  adoption  of  ASC  842  on  January  1,  2019,  the  Company  recorded  a  right-of-use  asset  and  a  corresponding  lease  liability  on  the
consolidated balance sheets as of December 31, 2020 and 2019. As there is no rate implicit in the Corporate Headquarters Lease, the Company estimated
its incremental borrowing rate based upon a synthetic credit rating and yield curve analysis. Based upon this analysis, the Company calculated a discount
rate of 8.0% for the Corporate Headquarters Lease.

As of December 31, 2020, the future minimum lease payments due under the operating lease for the Company’s corporate headquarters are as follows (in
thousands):

2021
2022
2023
2024
2025 and thereafter

Total remaining minimum rental payments

Less: effect of discounting

Total lease liability

$

$

Amount

4,505 
4,633 
4,764 
4,900 
1,242 
20,044 
(3,155)
16,889 

The Company recorded operating lease expense for the Corporate Headquarters Lease of $4.2 million for the years ended December 31, 2020 and 2019. As
of December 31, 2020, the remaining lease term of the Corporate Headquarters Lease was 4.3 years. The Company presents changes in its right-of-use
asset and lease liability on a combined net basis within “Other liabilities” in the consolidated statements of cash flows.

License and Collaboration Agreements

The Company has entered into various license agreements for certain technology. The Company could be required to make aggregate technical, clinical
development and regulatory milestone payments of up to $9.0 million and low single-digit royalty payments based on a percentage of net sales of licensed
products. As of December 31, 2020, the Company had made $0.7 million in aggregate milestone payments under these license agreements. The Company
may cancel these agreements at any time by providing 30 to 90 days’ notice to the licensors, and all payments not previously due would no longer be owed.

The  Company  has  also  entered  into  collaboration  agreements  with  various  third  parties  for  research  services  and  access  to  proprietary  technology
platforms.  Under  these  collaboration  agreements,  the  Company  could  be  required  to  make  aggregate  technical,  clinical  development  and  regulatory
milestones payments ranging from $12.5 million to $12.9 million per product candidate and low single-digit royalty payments based on a percentage of net
sales  on  a  product-by-product  basis.  As  of  December  31,  2020,  the  Company  had  made  $1.8  million  in  aggregate  milestone  payments  under  these
collaboration agreements.

F-26

Table of Contents

14.   401(k) Savings Plan

The Company has a defined-contribution savings plan under Section 401(k) of the IRC (the “401(k) Plan”). The 401(k) Plan covers all employees who
meet defined minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pretax basis. Beginning
on  January  1,  2018,  the  Company  matches  50%  of  an  employee’s  401(k)  contributions  up  to  a  maximum  of  6%  of  the  participant’s  salary,  subject  to
employer match limitations under the IRC. As such, the Company made $0.6 million and $0.6 million in contributions to the 401(k) Plan for the years
ended December 31, 2020 and 2019, respectively.

15.   Net (Loss) Income per Share

The following table summarizes the calculation of basic and diluted net (loss) income per share (in thousands, except per share amounts):

Net (loss) income

Weighted-average common shares outstanding, basic

Dilutive effect of outstanding stock options
Dilutive effect of unvested RSAs
Dilutive effect of unvested RSUs

Weighted-average common shares outstanding, diluted

Net (loss) income per share, basic
Net (loss) income per share, diluted

Years Ended December 31,

2020

2019

(43,842) $

35,426 
— 
— 
— 
35,426 

(1.24) $
(1.24) $

56,823 

33,080 
1,121 
1 
92 
34,294 

1.72 
1.66 

$

$
$

The  following  weighted-average  amounts  were  excluded  from  the  calculation  of  diluted  net  (loss)  income  per  share  because  their  effect  would  be  anti-
dilutive (in thousands):

Outstanding stock options
Unvested RSUs

Total

16.   Subsequent Events

Year Ended December 31,

2020

2019

6,594 
660 
7,254 

3,727 
24 
3,751 

Subsequent to December 31, 2020 and through the filing date of this Annual Report on Form 10-K, the Company sold an aggregate of 3,156,200 shares at
an average price of $9.87 per share for net proceeds of $30.2 million. Consequently, the Company has completed the sale of all available amounts under the
ATM Offering.

F-27

Table of Contents

Exhibit No.
3.1

3.2

4.1

4.2

4.3
10.1#

10.2#

10.3#

10.4#

10.5*#
10.6#

10.7#

10.8#

10.9#

10.10#

10.11#

10.12#

10.13

10.14†

10.15‡

10.16‡

10.17‡

21.1*
23.1*
31.1*

31.2*

32.1+

101*

*

+
#
†
‡

EXHIBIT INDEX

Description of Exhibit
Fourth Amended and Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 of the Registrant’s Annual Report on Form 10-K
(File No. 001-37998) filed March 8, 2018)
Amended and Restated Bylaws of the Registrant (incorporated by reference to Exhibit 3.2 of the Registrant’s Annual Report on Form 10-K (File No. 001-37998) filed
March 8, 2018)
Specimen Common Stock Certificate (incorporated by reference to Exhibit 4.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-215372) filed
December 30, 2016)
Amended and Restated Investors’ Rights Agreement by and among the Registrant and certain of its stockholders, dated April 17, 2015 as amended (incorporated by
reference to Exhibit 4.2 of the Registrant’s Registration Statement on Form S-1 (File No. 333-215372) filed December 30, 2016)
Description of Securities (incorporated by reference to Exhibit 4.3 of the Registrant’s Annual Report on Form 10-K (File No. 001-37998) filed February 27, 2020)
Jounce Therapeutics, Inc. 2017 Stock Option and Grant Plan and forms of award agreements thereunder (incorporated by reference to Exhibit 10.1 of the Registrant’s
Registration Statement on Form S-1/A (File No. 333-215372) filed January 17, 2017)
Form of Restricted Stock Unit Award Agreement under 2017 Stock Option and Incentive Plan (for employees) (incorporated by reference to Exhibit 10.1 of the
Registrant’s Quarterly Report on Form 10-Q (File No. 001-37998) filed August 9, 2018)
Jounce Therapeutics, Inc. 2013 Stock Option and Grant Plan and forms of award agreements thereunder (incorporated by reference to Exhibit 10.2 of the Registrant’s
Annual Report on Form 10-K (File No. 001-37998) filed March 8, 2018)
Jounce Therapeutics, Inc. 2017 Employee Stock Purchase Plan, As Amended (incorporated by reference to Exhibit 10.1 of the Registrant’s Quarterly Report on Form 10-
Q (File No. 001-37998) filed November 13, 2017)
Amended and Restated Non-Employee Director Compensation Policy
Amended and Restated Employment Agreement between Richard Murray and the Registrant, dated January 6, 2017 (incorporated by reference to Exhibit 10.4 of the
Registrant’s Registration Statement on Form S-1/A (File No. 333-215372) filed January 17, 2017)
Amended and Restated Employment Agreement between Kim Drapkin and the Registrant, dated January 6, 2017 (incorporated by reference to Exhibit 10.5 of the
Registrant’s Registration Statement on Form S-1/A (File No. 333-215372) filed January 17, 2017)
Amended and Restated Employment Agreement between Elizabeth Trehu and the Registrant, dated January 6, 2017 (incorporated by reference to Exhibit 10.6 of the
Registrant’s Registration Statement on Form S-1/A (File No. 333-215372) filed January 17, 2017)
Employment Agreement between Hugh Cole and the Registrant, dated August 14, 2017 (incorporated by reference to Exhibit 10.8 of the Registrant’s Annual Report on
Form 10-K (File No. 001-37998) filed March 8, 2018)
Form of Director Indemnification Agreement (incorporated by reference to Exhibit 10.12 of the Registrant’s Registration Statement on Form S-1 (File No. 333-215372)
filed December 30, 2016)
Form of Officer Indemnification Agreement (incorporated by reference to Exhibit 10.13 of the Registrant’s Registration Statement on Form S-1/A (File No. 333-215372)
filed January 17, 2017)
Senior Executive Cash Incentive Bonus Plan (incorporated by reference to Exhibit 10.14 of the Registrant’s Registration Statement on Form S-1/A (File No. 333-215372)
filed January 17, 2017)
Lease Agreement between ARE-770/784/790 Memorial Drive, LLC and the Registrant, dated November 1, 2016 (incorporated by reference to Exhibit 10.11 of the
Registrant’s Registration Statement on Form S-1 (File No. 333-215372) filed December 30, 2016)
Amended and Restated Exclusive License Agreement between Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center and Memorial
Hospital for Cancer and the Registrant, dated September 28, 2015 (incorporated by reference to Exhibit 10.9 of the Registrant’s Registration Statement on Form S-1 (File
No. 333-215372) filed December 30, 2016)
License Agreement by and between the Registrant and Gilead Sciences, Inc., dated August 31, 2020 (incorporated by reference to Exhibit 10.1 of the Registrant’s
Quarterly Report on Form 10-Q (File No. 001-37998) filed on November 6, 2020)
Stock Purchase Agreement by and between the Registrant and Gilead Sciences, Inc., dated August 31, 2020 (incorporated by reference to Exhibit 10.2 of the Registrant’s
Quarterly Report on Form 10-Q (File No. 001-37998) filed on November 6, 2020)
Registration Rights Agreement by and between the Registrant and Gilead Sciences, Inc., dated August 31, 2020 (incorporated by reference to Exhibit 10.3 of the
Registrant’s Quarterly Report on Form 10-Q (File No. 001-37998) filed on November 6, 2020)
List of Subsidiaries of the Registrant
Consent of Ernst & Young LLP, Independent Registered Public Accounting Firm
Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of
the Sarbanes-Oxley Act of 2002
Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of
the Sarbanes-Oxley Act of 2002
Certifications of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-
Oxley Act of 2002
The following materials from the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, formatted in eXtensible Business Reporting Language
(XBRL): (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Operations and Comprehensive Income (Loss), (iii) Consolidated Statements of Stockholders’
Equity, (iv) Consolidated Statements of Cash Flows and (v) Notes to Consolidated Financial Statements

Filed herewith

Furnished herewith
Indicates a management contract or any compensatory plan, contract or arrangement
Confidential treatment granted as to portions of the exhibit. Confidential materials omitted and filed separately with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended

Portions of this Exhibit have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K

Table of Contents

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

SIGNATURES

Date: February 25, 2021

JOUNCE THERAPEUTICS, INC.

By:

/s/ Richard Murray
Richard Murray, Ph.D.
President and Chief Executive Officer

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 registrant
and in the capacities and on the dates indicated.    

Signature

/s/ Richard Murray
Richard Murray, Ph.D.

/s/ Kim C. Drapkin
Kim C. Drapkin

/s/ Perry A. Karsen
Perry A. Karsen

/s/ Luis A. Diaz, Jr.
Luis A. Diaz, Jr., M.D.

/s/ Barbara Duncan
Barbara Duncan

/s/ J. Duncan Higgons
J. Duncan Higgons

/s/ Robert Iannone
Robert Iannone, M.D., M.S.C.E.

/s/ Robert Kamen
Robert Kamen, Ph.D.

/s/ Cary G. Pfeffer
Cary G. Pfeffer, M.D.

/s/ Luisa Salter-Cid
Luisa Salter-Cid, Ph.D.

Title

President, Chief Executive Officer and Director (Principal
Executive Officer)

Treasurer and Chief Financial Officer
(Principal Financial and Accounting Officer)

Date

February 25, 2021

February 25, 2021

Chairman of the Board of Directors

February 25, 2021

Director

Director

Director

Director

Director

Director

Director

February 25, 2021

February 25, 2021

February 25, 2021

February 25, 2021

February 25, 2021

February 25, 2021

February 25, 2021

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.5

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

The  purpose  of  this  Non-Employee  Director  Compensation  Policy  (the  “Policy”)  of  Jounce  Therapeutics,  Inc.,  a  Delaware
corporation (the “Company”), is to provide a total compensation package that enables the Company to attract and retain, on a
long-term basis, high-caliber directors who are not employees or officers of the Company. This Policy will become effective (the
“Effective Date”)  upon  approval  by  the  Company’s  Board  of  Directors  (the  “Board”). In  furtherance  of  this  purpose,  all  non-
employee directors shall be paid compensation for services provided to the Company as set forth below:

Cash Retainers

Annual Retainer for Board Membership: $35,000 for general availability and participation in meetings and conference calls of
our Board. No additional compensation for attending individual Board meetings.

Additional Annual Retainer for Non-Executive Chairperson of the Board: $30,000 to acknowledge the additional responsibilities
and time commitment of the Chairperson role.

Additional Annual Retainers for Committee Membership:

Audit Committee Chairperson:     $15,000

Audit Committee member:     $7,500

Compensation Committee Chairperson:         $12,500

Compensation Committee member:     $6,000

Nominating and Corporate Governance Committee Chairperson:     $8,000

Nominating and Corporate Governance Committee member:     $4,000

Science and Technology Committee Chairperson:         $12,500

Science and Technology Committee member:     $6,000

No additional compensation for attending individual committee meetings.

All cash retainers will be paid quarterly, in arrears, or upon the earlier of resignation or removal of the non-employee director.
Cash retainers owing to non-employee directors shall be annualized, meaning that with respect to non-employee directors who
join the Board during the calendar year, such amounts shall be pro-rated based on the number of calendar days served by such
director following such director’s appointment or election.

Equity Retainers

Initial  Option  Grant:  One-time  option  grant  to  each  new  non-employee  director  upon  his/her  election  to  the  Board  after  the
Effective Date to purchase 31,400 shares of common stock, par value $0.001 per share (the Common Stock”). Such initial option
grant shall be made upon the director first becoming a director. Such initial option grant shall vest in equal quarterly installments
during the 12 quarters following the grant date, subject to the director’s continued service on the Board.

On the date of each Annual Meeting of Stockholders: Annual option grant to each non-employee director serving on the Board
immediately  following  the  Company’s  annual  meeting  of  stockholders  to  purchase  15,700  shares  of  Common  Stock,  provided
that if at such time a director has served on the Board for less than 270 days, the number of shares subject to such option shall be
reduced to the applicable amount set forth below based on such director’s length of service on the Board as of such time:

Length of Service on Board as of
Annual Meeting Date
180 days or more, but less than 270
days
90 days or more, but less than 180
days
Less than 90 days

Number of Option Shares

11,776

7,850

0

Such annual option grant shall vest in equal quarterly installments during the 4 quarters following the grant date, subject to the
director’s continued service on the Board, provided that if the Company’s next annual meeting of stockholders is held prior to the
first  anniversary  of  the  grant  date,  the  vesting  of  such  annual  option  will  accelerate  in  full  as  of  the  date  of  such  next  annual
meeting  of  stockholders,  subject  to  the  director’s  continued  service  on  the  Board  as  of  immediately  prior  to  such  next  annual
meeting.

All of the foregoing option grants will become immediately exercisable upon the death, disability of a director or upon a Sale
Event (as defined in the Company’s 2017 Stock Option and Incentive Plan). In addition, if the option grants described above are
in  the  form  of  options  to  purchase  the  Company’s  common  stock,  par  value  $0.001  per  share  (the  “Common  Stock”),  the
directors will have until the earlier of one year following cessation of service as a director or the original expiration date of the
option to exercise the option (to the extent vested at the date of such cessation), provided that the director has not been removed
for cause.

Any stock option granted to a non-employee director pursuant to this Policy will be granted at an exercise price equal to the fair
market value of a share of Common Stock on the date of grant.

Expenses

The Company shall reimburse all reasonable out-of-pocket expenses incurred by non-employee directors in attending Board and
committee meetings.

ADOPTED AND EFFECTIVE: December 4, 2020.

Subsidiaries of the Registrant

Exhibit 21.1

Name
Jounce Mass Securities, Inc.

Jurisdiction of Organization
Massachusetts

Percentage Ownership
100%

We consent to the incorporation by reference in the following Registration Statements:

Consent of Independent Registered Public Accounting Firm

(1) Registration Statement (Form S-3 No. 333-223518) of Jounce Therapeutics, Inc.,
(2) Registration Statement (Form S-8 No. 333-215794) pertaining to the Jounce Therapeutics, Inc. 2013 Stock Option and Grant Plan, the Jounce

Therapeutics, Inc. 2017 Stock Option and Incentive Plan and the Jounce Therapeutics, Inc. 2017 Employee Stock Purchase Plan, and
(3) Registration Statements (Form S-8 Nos. 333-223519, 333-230088, and 333-236687) pertaining to the Jounce Therapeutics, Inc. 2017 Stock

Option and Incentive Plan and the Jounce Therapeutics, Inc. 2017 Employee Stock Purchase Plan;

of our report dated February 25, 2021, with respect to the consolidated financial statements of Jounce Therapeutics, Inc. included in this Annual Report
(Form 10-K) for the year ended December 31, 2020.

Exhibit 23.1

/s/ Ernst & Young LLP                                                    

Boston, Massachusetts
February 25, 2021

Exhibit 31.1

I, Richard Murray, certify that:

1. I have reviewed this Annual Report on Form 10-K of Jounce Therapeutics, Inc.;

CERTIFICATIONS

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange
Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the
registrant and have:

    a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure
that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly
during the period in which this report is being prepared;

    b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision,
to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles;

    c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of
the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

    d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal
quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the
registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the
registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

    a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely
to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

    b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over
financial reporting.

Date: February 25, 2021

By:

/s/ Richard Murray
Richard Murray, Ph.D.
President and Chief Executive Officer
(Principal Executive Officer)

Exhibit 31.2

I, Kim C. Drapkin, certify that:

1. I have reviewed this Annual Report on Form 10-K of Jounce Therapeutics, Inc.;

CERTIFICATIONS

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange
Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the
registrant and have:

    a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure
that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly
during the period in which this report is being prepared;

    b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision,
to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles;

    c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of
the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

    d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal
quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the
registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the
registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

    a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely
to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

    b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over
financial reporting.

Date: February 25, 2021

By:

/s/ Kim C. Drapkin
Kim C. Drapkin
Treasurer and Chief Financial Officer
(Principal Financial and Accounting Officer)

CERTIFICATIONS OF CEO AND CFO PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.1

In connection with this Annual Report on Form 10-K of Jounce Therapeutics, Inc. (the “Company”) for the year ended December 31, 2020, as filed with
the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company hereby certifies, pursuant to
18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of her or his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the
Company.

Date: February 25, 2021

Date: February 25, 2021

By:

By:

/s/ Richard Murray
Richard Murray, Ph.D.
President and Chief Executive Officer
(Principal Executive Officer)

/s/ Kim C. Drapkin
Kim C. Drapkin
Treasurer and Chief Financial Officer
(Principal Financial and Accounting Officer)