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Jounce Therapeutics

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FY2019 Annual Report · Jounce Therapeutics
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
________________________________________________________________________________________________________

FORM 10-K

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

________________________________________________________________________________________________________

For the fiscal year ended December 31, 2019
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

x

x

x 

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. x  

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b‑2 of the Act). Yes ☐  No x

As of June 28, 2019, 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 $79,433,477, based upon the closing price of the registrant’s Common Stock on June 28, 2019.

As of February 21, 2020, there were 34,049,091 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 2020 Annual Meeting of Stockholders to be filed within 120 days of the end of the registrant’s fiscal year ended

December 31, 2019 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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Table of Contents

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;

the  timing,  scope,  or  likelihood  of  regulatory  filings  and  approvals,  including,  as  applicable,  timing  of  our  investigational  new  drug
application 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-8064 to Celgene, a wholly-owned subsidiary of Bristol-Myers Squibb Company;

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;

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

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.

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), 
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.

(https://www.linkedin.com/company/3494537/) 

LinkedIn 

Twitter 

page 

and 

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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.  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 most  advanced  product  candidate,  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 conducting a Phase
2 clinical trial, which we refer to as EMERGE, of vopratelimab in combination with ipilimumab, an anti-CTLA-4 antibody, in PD-1/PD-L1 inhibitor
experienced  patients  with  one  of  two  tumor  types,  non-small  cell  lung  cancer,  or  NSCLC,  and  urothelial  cancer.  EMERGE  is  the  first  of  our
Phase 2 clinical trials designed based on the relationship between the ICOS hi CD4 T cells and potential clinical benefit. We expect to report
EMERGE data including preliminary efficacy and biomarker relationships to clinical outcomes for up to 40 NSCLC patients in the second half of
2020.

In  addition  to  EMERGE,  we  are  in  the  planning  stages  of  a  randomized  Phase  2  clinical  trial,  which  we  refer  to  as  SELECT.  SELECT  is
designed  to  evaluate  the  efficacy  of  vopratelimab  in  combination  with  JTX-4014,  our  anti-PD-1  antibody,  compared  to  JTX-4014  alone  in
biomarker-selected,  immunotherapy-naive  second-line  NSCLC  patients.  We  have  identified  TISvopra,  an  18  gene  RNA  Tumor  Inflammation
Signature used with a vopratelimab-specific threshold, as a baseline predictive biomarker associated with the emergence of ICOS hi CD4 T
cells. We expect to initiate SELECT in mid-2020 and to report interim clinical data in 2021.

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 completed enrollment in a Phase 1
clinical  trial  of  JTX‑4014  monotherapy  that  was  designed  to  assess  safety,  and  we  have  determined  the  recommended  Phase  2  dose.  We
presented  safety  and  preliminary  efficacy  data  from  this  Phase  1  clinical  trial  at  the  November  2019  annual  meeting  of  the  Society  for
Immunotherapy of Cancer. Based on the results of this clinical trial, we plan to use JTX-4014 in combination with our other product candidates,
including in combination with vopratelimab in SELECT.

JTX-1811  is  the  most  recent  product  candidate  to  emerge  from  our  Translational  Science  Platform.  JTX-1811  is  a  monoclonal  antibody
designed to selectively deplete T regulatory cells in the tumor microenvironment, or TME. The function of T regulatory cells is to suppress an
ongoing-immune response, and by depleting these immunosuppressive cells, we aim to foster more productive immune responses within the
TME.

Our  product  candidate  JTX-8064  was  exclusively  licensed  to  Celgene  Corporation,  or  Celgene,  in  July  2019.  Celgene  was  subsequently
acquired by Bristol-Myers Squibb Company, or BMS. JTX-8064 is an antibody that binds to LILRB2, which is a cell surface receptor expressed
on  macrophages.  JTX-8064  was  the  first  tumor-associated  macrophage  candidate  to  emerge  from  our  Translational  Science  Platform.  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.

Our  strategy  is  to  use  a  biomarker-driven  approach  from  discovery  through  clinical  development.  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. We
can also use characteristics defined by our biomarker efforts to focus on niche indications and/or niche subsets within indications to inform our
clinical strategy. 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.

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We  have  assembled  a  highly-experienced  internal  and  external  team  of  experts  in  immunotherapy  to  help  us  leverage  our  Translational
Science  Platform  to  drive  the  development  of  our  early  discovery  programs  and  our  product  candidates,  including  vopratelimab.  Two  of  our
founders, Dr. James Allison and Dr. Padmanee Sharma of the University of Texas MD Anderson Cancer Center, were initially responsible for
the  translational  science  behind  ICOS.  Dr. Allison  played  a  fundamental  role  in  ushering  in  the  era  of  immune  checkpoint  therapy,  including
contributing to the understanding of the basic science of CTLA-4 that supported the development of ipilimumab, marketed as Yervoy® by BMS.
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.

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;

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. Allison, led to the discovery of one of the first immune cell checkpoint therapies. 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
need.  Data  emerging  from  clinical  studies  with  these  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.

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.  Reasons  for
resistance to immunotherapy may include a lack of appropriate immune cells in the TME, for example, the absence of T effector cells, or the
presence of immunosuppressive cells, such as T regulatory cells or tumor associated macrophages. In these cases, therapeutic approaches
that target other cell types within the TME to convert colder tumors to hot tumors may broaden the applicability of cancer immunotherapies. In
addition,  a  tumor  may  initially  respond  to  a  PD-1  checkpoint  inhibitor  immunotherapy,  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  instances,  combination  therapy  approaches  that  target  more  than  one  checkpoint,  or  more  than  one  mechanism,  may  be  key  to
maximizing the benefit of cancer immunotherapies.

We believe that our Translational Science Platform, which 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, 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.

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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 overall market for immunotherapy is expected to expand over the next five years, with 2025
market size estimates ranging from $47 billion to $61 billion across solid and blood-based tumors according to market reports.

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

Lead Program Vopratelimab: An Anti-ICOS Monoclonal Antibody Immunotherapy

Our most advanced product candidate, 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 current and planned Phase 2 clinical
trials  has  been  informed  by  data  suggesting  that  ICOS  can  be  upregulated  on  T  cells  following  exposure  to  certain  agents  and  our  ex vivo
studies indicating that a high expression of ICOS per T cell is necessary for vopratelimab to drive the activation of T effector cells. Our current
and planned Phase 2 clinical trials aim to determine whether vopratelimab can offer a treatment alternative to patients who have progressed
after treatment with a PD-1 inhibitor, and/or whether it can enhance the therapeutic benefit of PD-1 inhibitors.

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Vopratelimab  was  assessed  in  a  Phase  1/2  clinical  trial  that  we  refer  to  as  ICONIC.  The  ICONIC  patient  population  included  patients  with
multiple  relapsed  and  refractory  solid  tumors  who  had  a  median  of  three  prior  lines  of  therapy  for  metastatic  disease.  Vopratelimab  was
observed to be safe and well-tolerated, both alone and in combination with each of the anti-PD-1 antibodies nivolumab and pembrolizumab, as
well as with ipilimumab. Clinical data from ICONIC was presented at the June 2018 American Society of Clinical Oncology annual meeting, and
updates on pharmacodynamic and predictive biomarker subset analyses were presented at the American Association of Cancer Research and
Society  for  Immunotherapy  of  Cancer  annual  meetings  in  2019.  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  two  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 is currently being assessed in our EMERGE Phase 2 clinical trial in PD-1/PD-L1 inhibitor experienced patients in two tumor types,
NSCLC and urothelial cancer. In EMERGE, subjects receive vopratelimab in a sequenced combination with ipilimumab, which was informed by
our understanding of the kinetics of induction of ICOS hi CD4 T cells by ipilimumab and their sustained activation by vopratelimab. The primary
endpoint is overall response rate and secondary endpoints include safety, duration of response, progression free survival and overall survival.
Additional  assessments  will  include  monitoring  of  ICOS  hi  CD4  T  cell  emergence  and  a  range  of  other  biomarkers,  including  exploratory
assessments  of  potential  predictive  biomarkers.  Enrollment  in  EMERGE  commenced  in  June  2019;  we  are  currently  enrolling  the  NSCLC
cohorts.  We  paused  enrollment  in  the  urothelial  cancer  cohorts  following  the  approval  by  the  United  States  Food  &  Drug  Administration,  or
FDA, in December 2019 of an antibody-drug conjugate in the same population of urothelial cancer patients. We expect to report EMERGE data
including preliminary efficacy and biomarker relationships to clinical outcomes for up to 40 NSCLC patients in the second half of 2020.

We are also in the planning stages of SELECT, a Phase 2 clinical trial of vopratelimab in combination with JTX-4014 compared to JTX-4014
alone.  SELECT  will  be  a  randomized,  ex-U.S.  trial  with  TISvopra  biomarker-selected,  immunotherapy-naive  second-line  NSCLC  patients.  The
TISvopra  biomarker  is  a  baseline  tumor  RNA  signature  with  a  threshold  optimized  for  the  emergence  of  peripheral  ICOS  hi  CD4  T  cells,  a
vopratelimab pharmacodynamic biomarker associated with clinical benefit and not associated with PD-1 inhibitor therapy. We identified TISvopra
through a reverse translational analysis of tumor biopsies in a subset of ICONIC patients, in whom CD4 T cell populations were analyzed for
ICOS  levels.  This  indicated  an  association  between  the  emergence  of  ICOS  hi  CD4  T  cells  and  TISvopra.  When  TISvopra  was  applied
retrospectively to clinical outcomes, it also appeared predictive of improved response rate, six- and nine-month progression free survival and
overall survival.

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 combinations with potential 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.

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. We have completed enrollment and have identified the recommended Phase 2 dose for JTX-4014.

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JTX-1811: An Antibody Designed to Deplete T regulatory Cells

JTX-1811  is  the  most  recent  product  candidate  to  emerge  from  our  Translational  Science  Platform.  JTX-1811  is  a  monoclonal  antibody
designed to selectively deplete T regulatory cells in the tumor microenvironment. Because T regulatory cells are immunosuppressive cells, we
seek to enhance immune responses within the tumor microenvironment by depleting these cells. 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.

Discovery Programs

With our focus on bringing the right immunotherapy to the right patients, we have invested 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. 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 thereby convert cold
tumors to hot tumors.

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
non-immune cells such as stromal cells, with the goal of enabling us to develop therapies to benefit patients with tumors across the hot to cold
spectrum.  We  believe  that  some  of  our  discovery  approaches,  including  targeting  stromal  cells,  may  identify  product  candidates  with  the
potential  to  address  a  significant  unmet  medical  need  by  turning  cold  tumors  hot  and  making  them  amenable  to  PD-1  checkpoint  inhibitors,
such as JTX-4014, and other immunotherapies.

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. Celgene was subsequently acquired by BMS.

Under  the  terms  of  the  Celgene  License  Agreement,  Celgene  paid  us  a  one-time,  non-refundable  upfront  payment  of  $50.0  million.  We  are
eligible  to  receive  payments  from  Celgene  upon  the  achievement  of  specified  clinical,  regulatory  and  sales  milestones,  including  potential
clinical  and  regulatory  milestone  payments  up  to  an  aggregate  total  of  $180.0  million  and  potential  sales  milestone  payments  up  to  an
aggregate  total  of  $300.0  million.  We  are  also  eligible  to  receive  royalties  at  percentage  rates  ranging  from  mid-single-digits  to  low-double-
digits, based on future annual net sales, on product-by-product and country-by-country basis for the royalty term. The royalty term will expire
upon the later of (i) the date on which there are no longer any valid composition of matter or method of use claims within our patents or patents
jointly owned by us and Celgene related to JTX-8064 and certain derivatives thereof in such country and (ii) the twelve-year anniversary of the
date of the first commercial sale of the first product in such country. Royalty payments may be reduced in specified circumstances, including
payments required to be made by Celgene to third parties to acquire patent rights, up to an aggregate minimum floor, or may be reduced upon
the occurrence of certain specified events, including certain compulsory licenses, or if associated with certain products.

Celgene is obligated to use commercially reasonable efforts to develop, seek regulatory approval for and commercialize at least one product.
During  the  term  of  the  license,  the  Company  is  prohibited  from  developing,  manufacturing  or  commercializing  any  product  that  contains  an
antibody or other biologic that is specifically directed to LILRB2 or any related antibody or related biologic.

Unless terminated earlier in accordance with its terms, the Celgene License Agreement provides that it will expire (i) on a product-by-product
and country-by-country basis on the date of the expiration of the royalty term with respect to such product in such country and (ii) in its entirety
upon the expiration of all applicable royalty term with respect to

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JTX-8064  and  certain  derivatives  thereof  in  all  countries,  following  which  the  applicable  licenses  under  the  Celgene  License  Agreement  will
become  fully  paid-up,  perpetual,  irrevocable  and  royalty-free.  Celgene  may  terminate  the  License  Agreement  for  convenience,  in  its  sole
discretion, in its entirety or on a product-by-product or country-by-country basis, at any time with prior written notice to 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 vopratelimab, JTX-4014 and JTX-1811.

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:

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traditional cancer therapies, including chemotherapy;

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 & Co., 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 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

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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 21, 2020, with respect to vopratelimab patent rights, we own three pending U.S. provisional patent applications, four pending U.S.
non-provisional applications, thirty-six pending foreign patents and patent applications, and four pending Patent Cooperation Treaty, or PCT,
patent applications within eight patent families that cover compositions of matter and methods of use and ICOS-related biomarkers, and we
own two issued U.S. patents that cover compositions of matter and methods of use. As of February 21, 2020, with respect to JTX-4014 patent
rights,  we  own  one  pending  U.S.  non-provisional  application,  seventeen  pending  foreign  patent  applications,  and  one  pending  provisional
application  within  two  patent  families  that  cover  compositions  of  matter  and  methods  of  use,  and  we  do  not  own  any  issued  patents.  As of
February 21, 2020, with respect to JTX-1811 patent rights, we own one pending U.S. non-provisional application within one patent family that
covers compositions of matter and methods of use, and we do not own any issued patents. 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 of a patent 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  vopratelimab,  JTX-4014,  JTX-1811  and  our
other future product candidates. 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

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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 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  vopratelimab,  JTX-4014,  JTX-1811  and  other  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.

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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.

Vopratelimab, JTX-4014, JTX-1811 and other 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 vopratelimab,
JTX-4014, JTX-1811 and other 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:

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

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

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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, or DSMB. This group provides authorization as
to whether or 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.

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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

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conducted  to  demonstrate  that  vopratelimab,  JTX-4014,  JTX-1811  and  other  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 advanced therapy. 

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  2020  is  $2,942,965  for  an  application
requiring clinical data. The sponsor of an approved application is also subject to an annual program fee, which for fiscal year 2020 is $325,424.
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

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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.

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

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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  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 Risk Evaluation
and Mitigation Strategy, or 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

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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.

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.

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

Depending upon the timing, duration and specifics of FDA approval of vopratelimab, JTX-4014, JTX-1811 and other 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
January  31,  2020,  the  FDA  has  approved  26  biosimilar  products  for  use  in  the  United  States.  No  interchangeable  biosimilars  have  been
approved.

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.

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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  1,  2020,  the  website  of  the  European
Commission  reported  that  the  implementation  of  the  new  Clinical  Trials  Regulation  was  dependent  on  the  development  of  a  fully  functional
clinical trials portal and database, which would be confirmed by an independent audit, and that the new legislation would come into effect six
months  after  the  European  Commission  publishes  a  notice  of  this  confirmation.  The  website  indicated  that  the  audit  was  expected  to
commence in December 2020.

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

On  June  23,  2016,  the  electorate  in  the  United  Kingdom  voted  in  favor  of  leaving  the  European  Union,  commonly  referred  to  as  Brexit.
Following protracted negotiations, the United Kingdom left the European Union on January 31, 2020. Under the withdrawal agreement, there is
a transitional period until December 31, 2020 (extendable up to two years). Discussions between the United Kingdom and the European Union
have so far mainly focused on finalizing withdrawal issues and transition agreements but have been extremely difficult to date. To date, only an
outline of a trade agreement has been reached.  Much remains open, but the Prime Minister has indicated that the United Kingdom will not
seek  to  extend  the  transitional  period  beyond  the  end  of  2020.    If  no  trade  agreement  has  been  reached  before  the  end  of  the  transitional
period,  there  may  be  significant  market  and  economic  disruption.  The  Prime  Minister  has  also  indicated  that  the  UK  will  not  accept  high
regulatory alignment with the EU.

Since  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. 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

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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.

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

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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  a  May  2018  report,
the Congressional Budget Office estimated that, the number of uninsured will increase by 6 million in 2028 as compared to 2018, in part due to
the elimination of the individual mandate, and that premiums in insurance markets may rise.

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. The Trump administration and CMS have both stated that the ruling will have no
immediate effect, and on December 30, 2018 the same judge issued an order staying the judgment pending appeal. The Trump Administration
recently represented to the Court of Appeals considering this judgment that it does not oppose the lower court’s ruling. On July 10, 2019, the
Court of Appeals for the Fifth Circuit heard oral argument in this case. On December 18, 2019, that 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. On January 21, 2020, the U.S. Supreme Court declined to review this
decision on an expedited basis. 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
federal  level,  Congress  and  the  current  administration  have  each  indicated  that  it  will  continue  to  seek  new  legislative  and/or  administrative
measures  to  control  drug  costs.  For  example,  on  December  23,  2019,  the  Trump  Administration  published  a  proposed  rulemaking  that,  if
finalized, would allow states or certain other non-federal government entities to submit importation program proposals to FDA for review and
approval. Applicants would be required to demonstrate their importation plans pose no additional risk to public health and safety and will result
in  significant  cost  savings  for  consumers.  At  the  same  time,  FDA  issued  draft  guidance  that  would  allow  manufacturers  to  import  their  own
FDA-approved drugs that are authorized for sale in other countries (multi-market approved 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.

Employees

As of December 31, 2019, we had 130 full-time employees. Of these full-time employees, 44 have Ph.D. or M.D. degrees and 101 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

We  were  incorporated  under  the  laws  of  the  State  of  Delaware  in  March  2012.  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.

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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  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

We are early in our development efforts. Our product candidates vopratelimab and JTX-4014 are clinical-stage programs, and JTX-
1811 and other future product candidates are in preclinical or earlier stages of development. If we are unable to advance our product
candidates  through  clinical  development,  advance  other  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: vopratelimab and JTX-4014 are our only clinical-stage product candidates, and JTX-1811 and other
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 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  July  2019,  we  granted  an  exclusive  license  for  the  development,
manufacture  and  commercialization  of  JTX-8064  to  Celgene  Corporation,  or  Celgene,  a  wholly-owned  subsidiary  of  Bristol-Myers  Squibb
Company, or BMS, and we may never receive any payments from Celgene for the achievement of research and development or commercial
milestones, or royalties from potential future sales of JTX-8064. 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  Food  and  Drug  Administration,  or  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 JTX-1811 and our future product candidates;

acceptance of investigational new drug applications, or INDs, 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;

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•

•

•

•

•

•

•

•

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;

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.

Our product candidates vopratelimab and JTX-4014 are clinical-stage programs and JTX-1811 and future product candidates are in preclinical
or earlier stages of development. The risk of failure 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 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 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 Europe 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:

•

•

•

•

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;

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•

•

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•

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•

•

•

•

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;

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;

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  compounds  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, or DSMB, 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:

•

•

•

•

•

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.

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Our current and future product candidates we develop 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.

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 established that vopratelimab is safe in humans
in studies to date, we cannot predict if future clinical trials of our product candidates, 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.  In  addition,  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 and 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 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  a  sufficient
number of patients who remain in the study until its conclusion. We may experience difficulties in patient enrollment in our clinical trials for a
variety of reasons. The enrollment of patients depends on many factors, including:

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the patient eligibility criteria defined in the protocol;

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

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

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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  for  future
patient enrichment efforts; and

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.

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. Specifically, there are numerous trials on-going or in development targeting PD-1/PD-L1 experienced patients
with non-small cell lung cancer, which is the same patient population we seek to enroll in EMERGE, including GlaxoSmithKline plc’s Phase 3
trial of its ICOS agonist and docetaxel in combination and other Phase 3 trials. 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  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.

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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.

Among  other  things,  the  research,  testing,  manufacturing,  labeling,  approval  and  license  maintenance,  selling,  import  and  export,  marketing
and distribution of biologic products 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. In addition, failure to comply with FDA and other applicable domestic and foreign regulatory requirements
may subject us to administrative or judicially imposed sanctions, including the following:

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untitled and warning letters;

civil or criminal penalties and fines;

injunctions;

suspension or withdrawal of marketing approval;

suspension of any ongoing clinical trials;

product recalls;

refusal to accept or approve BLAs or supplements thereto filed by us;

restrictions on operations, including costly new manufacturing requirements; or

seizure or detention of our products or import bans.

Prior  to  receiving  approval  to  commercialize  our  product  candidates  in  the  United  States  or  abroad,  we  and  any  of  our  existing  or  future
collaborators or licensees must demonstrate with substantial evidence from well-controlled clinical trials, and to the satisfaction of the FDA and
comparable foreign regulatory authorities, that such product candidates are safe and effective for their intended uses. Even if we and any of our
existing or future collaborators or licensees 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.  Administering  our  product
candidates to humans may produce undesirable side effects, which could interrupt, delay or cause suspension of clinical trials of our product
candidates and result in the FDA or other regulatory authorities denying approval of our current and future product candidates for any or all
targeted indications.

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. The FDA can delay, limit or deny
approval of a product candidate for many reasons, including, but not limited to, the following:

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a product candidate may not be deemed safe or effective;

FDA officials may not find the data from preclinical studies and clinical trials sufficient;

the  FDA  might  not  deem  our  or  our  third-party  manufacturers’  processes  or  facilities  adequate  for  approval  of  our  marketing
applications; or

the FDA may change its approval policies or adopt new regulations.

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.

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

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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 related to 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 are placing significant focus on the development of our product candidates 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 and 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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Even if we complete the necessary clinical trials, we cannot predict when or if we will obtain marketing approval to commercialize a
product or the approval may be for a narrower indication than we expect.

We cannot commercialize a product candidate until the appropriate regulatory authorities have reviewed and approved the product candidate.
Even  if  our  product  candidates  demonstrate  safety  and  efficacy  in  clinical  trials,  the  regulatory  agencies  may  not  complete  their  review
processes in a timely manner, or we may not be able to obtain marketing approval. In addition, 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.

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.

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,
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.

Additionally, on June 23, 2016, the electorate in the United Kingdom voted in favor of leaving the European Union, commonly referred to as
Brexit. Following protracted negotiations, the United Kingdom left the European Union on January 31, 2020. Under the withdrawal agreement,
there  is  a  transitional  period  until  December  31,  2020  (extendable  up  to  two  years).  Discussions  between  the  United  Kingdom  and  the
European Union have so far mainly focused on finalizing withdrawal issues and transition agreements but have been extremely difficult to date.
To date, only an outline of a trade agreement has been reached.  Much remains open, but the Prime Minister has indicated that the United
Kingdom will not seek to extend the transitional period beyond the end of 2020.  If no trade agreement has been

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reached  before  the  end  of  the  transitional  period,  there  may  be  significant  market  and  economic  disruption.  The  Prime  Minister  has  also
indicated that the UK will not accept high regulatory alignment with the EU.

Since  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. 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.

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 good clinical practice, or GCP,
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;

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

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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 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  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 future 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 program may be materially
and  irreversibly  harmed.  If  we  are  unable  to  rely  on  clinical  data  collected  by  our  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.  Furthermore,  in  EMERGE,  due  to  a  site  error,  we  had  to  enroll  additional  patients  to  achieve  the  number  of  patients
required for our statistical analysis. As a result, 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.

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:

•

•

•

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;

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•

•

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.

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

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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  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
vopratelimab and 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 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:

•

•

•

•

We  do  not  have  the  capability  internally  to  manufacture  drug  products  or  drug  substances  for  clinical  use.  We  use  third-party
manufacturers  for  manufacturing  vopratelimab  and  JTX-4014  for  our  on-going  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.

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  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-ICOS antibodies of BMS, 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  may  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.

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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 approaches to address cancer.
These treatments are often combined with one another in an attempt to maximize the response rate.

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  depend  on  Celgene  to  develop,  manufacture  and  commercialize  JTX-8064  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  July  2019,  we  entered  into  a  License  Agreement,  or  the  Celgene  License  Agreement,  with  Celgene.  Pursuant  to  the  Celgene  License
Agreement, we granted Celgene an exclusive, worldwide license to develop, manufacture and commercialize JTX-8064. The license provides
for  potential  payment  to  us  from  Celgene  upon  the  achievement  of  specified  clinical,  regulatory  and  sales  milestones,  and  potential  royalty-
based revenue if JTX-8064 is successfully commercialized. As a result of this license, we will not control the nature, timing or cost of bringing
JTX-8064 to market. We cannot provide any assurance with respect to the success of the license. The acquisition of Celgene by BMS may
result in a change in Celgene’s business priorities, and as such, may lead to changes in its future operations, contracts and strategic plans,
including those involving JTX-8064, and may have a material adverse effect on Celgene’s development, manufacture or commercialization of
JTX-8064. Any such change could affect Celgene’s ability to retain and motivate key personnel who are important to the development of JTX-
8064,  reduce  or  terminate  its  efforts  to  develop,  manufacture  or  launch  JTX-8064,  and/or  cause  the  Celgene  License  Agreement  to  be
terminated. There is no guarantee that BMS will place the same emphasis on the development of JTX-8064 as Celgene, and our business may
be harmed. BMS may elect to terminate the Celgene License Agreement and any such termination may adversely affect our business and our
stock price and make it more difficult for us to enter into a collaboration agreement or license with another party.

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:

•

•

•

•

•

Collaborators,  including  licensors,  have  significant  discretion  in  determining  the  efforts  and  resources  that  they  will  apply  to  these
collaborations. For example, under the Celgene License Agreement, development and commercialization plans and strategies for JTX-
8064 will be conducted by Celgene.

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.

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•

•

•

•

Collaborators may 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.

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. For example, Celgene has the exclusive right to enforce,
maintain or defend our intellectual property rights for JTX-8064 under the Celgene License Agreement.

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.  For  example,  until
termination  or  expiration  of  the  Celgene  License  Agreement,  we  may  not  directly  or  indirectly  research,  develop,  manufacture  or
commercialize any antibody or biologic that is specifically directed to the LILRB2 receptor.

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.

If  we  establish  one  or  more  licenses  or  collaborations,  all  of  the  risks  relating  to  product  development,  regulatory  approval  and
commercialization described in this Annual Report on Form 10-K would also apply to the activities of any such 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 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 Celgene License Agreement, we have granted worldwide exclusive rights to Celgene for any antibody or biologic that is
specifically  directed  to  the  LILRB2  receptor,  and  during  the  term  of  the  agreement  we  will  be  restricted  from  granting  similar  rights  to  other
parties. This exclusivity could limit our ability to enter into strategic collaborations with future collaborators.

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

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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:

•

•

•

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.

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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,  liability
claims may result in:

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•

•

decreased demand for our product candidates;

injury to our reputation;

withdrawal of clinical trial participants;

initiation of investigations by regulators;

costs to defend the related litigation;

a diversion of management’s time and our resources;

substantial monetary awards to trial participants or patients;

product recalls, withdrawals or labeling, marketing or promotional restrictions;

loss of revenue;

exhaustion of any available insurance and our capital resources;

the inability to commercialize any product candidate; and

a decline in our share price.

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 anti-ICOS antibodies of BMS, 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  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.

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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.

For  example,  with  enactment  of  the  Tax  Cuts  and  Jobs  Act  of  2017,  which  was  signed  by  the  President  on  December  22,  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 a May 2018 report, the Congressional Budget Office estimated that, the number of uninsured will increase by 6
million in 2028 as compared to 2018, in part due to the elimination of the individual mandate, and that premiums in insurance markets may rise.
Further, each chamber of the Congress has put forth multiple bills designed to repeal or repeal and replace portions of the ACA. Although none
of  these  measures  has  been  enacted  by  Congress  to  date,  Congress  may  consider  other  legislation  to  repeal  and  replace  elements  of  the
ACA.

Further, 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. The Trump administration and CMS have both stated that the ruling will have no
immediate effect, and on December 30, 2018 the same judge issued an order staying the judgment pending appeal. The Trump administration
has represented to the US Court of Appeals for the Fifth Circuit considering this judgment that it does not oppose the lower court’s ruling. To
that end, on May 1, 2019, the Justice Department filed a brief asking the Court to strike down the entirety of the ACA. Thereafter, on July 10,
2019,  the  Court  of  Appeals  for  the  Fifth  Circuit  heard  oral  argument  in  this  case.  In  those  arguments,  the  Trump  administration  argued  in
support of upholding the lower court decision. On December 18, 2019, that 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. On January 21, 2020, the U.S. Supreme Court declined to review this decision on an expedited
basis. Litigation and legislation over the ACA are likely to continue, with unpredictable and uncertain results.

The current administration has also taken executive actions to undermine or delay implementation of the ACA. In January 2017, the President
signed  an  Executive  Order  directing  federal  agencies  with  authorities  and  responsibilities  under  the  ACA  to  waive,  defer,  grant  exemptions
from, or delay the implementation of any provision of the ACA that would impose a fiscal or regulatory burden on states, individuals, healthcare
providers, health insurers, or manufacturers of pharmaceuticals or medical devices. In October 2017, the President signed a second Executive
Order allowing for the use of association health plans and short-term health insurance, which may provide fewer health benefits than the plans
sold  through  the  ACA  exchanges.  At  the  same  time,  the  Administration  announced  that  it  will  discontinue  the  payment  of  cost-sharing
reduction, or CSR, payments to insurance companies until Congress approves the appropriation of funds for such CSR payments. The loss of
the CSR payments is expected to increase premiums on certain policies issued by qualified health plans under the ACA.

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, or HITECH, 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.

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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. 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 $27.4 million for the year ended December 31, 2018. As of December 31, 2019, we had an
accumulated deficit of $107.2 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.

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 vopratelimab and JTX-4014;

completing preclinical and clinical development of JTX-1811;

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;

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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 other 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,  2019,  our  cash,  cash  equivalents  and
investments were $170.4 million. We expect to continue to spend substantial amounts to continue the clinical development of vopratelimab and
JTX-4014 and preclinical and clinical development of JTX-1811 and 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;

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;

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 and investments of $170.4 million as of December 31, 2019 will enable us to fund our operating expenses and capital
expenditure requirements through the end of 2021.

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.

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

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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.

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  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.

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

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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.

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.

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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 that may be construed to cover the targets of 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. Additionally, under the Celgene License Agreement, if Celgene is required to obtain a right or a license for
intellectual property from a third party for the development, manufacturing or commercialization of JTX-8064, Celgene may deduct payments
for such right or license from any royalties payable to us, up to an aggregate minimum floor. Any of the foregoing could have a material adverse
effect on our business, financial condition, results of operations and prospects.

Furthermore, we are testing 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.

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  our  Celgene  License  Agreement,
Celgene has the exclusive right to enforce, maintain or defend our intellectual property rights with respect to JTX-8064. Therefore, 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 Celgene or any other of our licensors 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

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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.

We may not be able to protect our intellectual property and proprietary rights throughout the world.

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.

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  is  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.

Generic or biosimilar product manufacturers may develop, seek approval for, and launch biosimilar versions or generic versions, respectively, of
our  products.  The  FDA  has  published  draft  guidance  documents  on  biosimilar  product  development.  For  the  FDA  to  approve  a  biosimilar
product as interchangeable with a reference product, the agency must find that the biosimilar product can be expected to produce the same
clinical  results  as  the  reference  product  and,  for  products  administered  multiple  times,  the  biosimilar  and  the  reference  biologic  may  be
switched after one has been previously administered without increasing safety risks or risks of diminished efficacy relative to exclusive use of
the reference biologic. 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. In particular, a biosimilar product could be significantly less costly to bring to market
and priced significantly lower than our products, if approved by the FDA.

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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,

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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 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.

We conduct our operations at our facility in Cambridge, Massachusetts, 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 will need to grow the size of our organization, and we may experience difficulties in managing this growth.

As  of  December  31,  2019,  we  had  130  full-time  employees,  including  101  employees  engaged  in  research  and  development.  As  our
development  and  commercialization  plans  and  strategies  develop,  we  expect  to  need  additional  managerial,  operational,  sales,  marketing,
financial and other personnel. Future growth would impose significant added responsibilities on members of management, including:

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identifying, recruiting, integrating, maintaining and motivating additional employees;

managing our internal development efforts effectively, including the clinical and FDA review process for our current and future product
candidates, while complying with our contractual obligations to contractors and other third parties; and

improving our operational, financial and management controls, reporting systems and procedures.

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Our future financial performance and our ability to commercialize our current and future product candidates will depend, in part, on our ability to
effectively expand our organization by hiring new employees and expand our groups of consultants and contractors and manage any future
growth,  and  our  management  may  also  have  to  divert  a  disproportionate  amount  of  its  attention  away  from  day-to-day  activities  in  order  to
devote a substantial amount of time to managing these growth activities.

We  currently  rely,  and  for  the  foreseeable  future  will  continue  to  rely,  in  substantial  part  on  certain  independent  organizations,  advisors  and
consultants to provide certain services, including substantially all aspects of marketing approval, clinical management, and manufacturing. We
cannot assure stockholders that we can effectively manage our outsourced activities.

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.

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

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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  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.

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. Cyber-attacks could cause us to incur

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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  natural  disasters  and  our  business  continuity  and
disaster recovery plans may not adequately protect us from a serious disaster.

Natural disasters could severely disrupt our operations 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.

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.  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;

continued efforts by BMS to develop and commercialize JTX-8064 following the closing of the transaction with Celgene;

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.

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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,  2019,  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  54 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:

•

•

•

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. As a result of these ownership changes, our net operating loss and tax credit carryforwards allocable to 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.

We  are  incurring  and  will  continue  to  incur  significantly  increased  costs  as  a  result  of  operating  as  a  public  company,  and  our
management is now 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.

We  are  a  “smaller  reporting  company,”  and  the  reduced  disclosure  requirements  applicable  to  smaller  reporting  companies  may
make our common stock less attractive to investors.

We are considered a “smaller reporting company” under Rule 12b-2 of the Exchange Act. We are therefore entitled to rely on certain reduced
disclosure requirements, such as an exemption from providing selected financial data and

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executive  compensation  information.  These  exemptions  and  reduced  disclosures  in  our  SEC  filings  due  to  our  status  as  a  smaller  reporting
company also mean our auditors are not required to review our internal control over financial reporting and may make it harder for investors to
analyze our results of operations and financial prospects. We cannot predict if investors will find our common stock less attractive because we
may rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for
our  common  stock  and  our  common  stock  prices  may  be  more  volatile.  We  will  remain  a  smaller  reporting  company  until  our  public  float
exceeds $250 million or our annual revenues exceed $100 million with a public float greater than $700 million.

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:

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•

•

•

•

•

•

•

•

the timing and cost of, and level of investment in, research and development activities relating to our current and other 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  other  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 and future 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;

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•

•

•

•

•

the  success  of  our  exclusive  license  to  Celgene  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; and

the changing and volatile global economic environment.

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.

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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. There is uncertainty as to whether a court would enforce
such provision with respect to claims under the Securities Act, and 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 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 21, 2020, we had approximately 19
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

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.

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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.  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 most  advanced  product  candidate,  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 conducting a Phase
2 clinical trial, which we refer to as EMERGE, of vopratelimab in combination with ipilimumab, an anti-CTLA-4 antibody, in PD-1/PD-L1 inhibitor
experienced  patients  with  one  of  two  tumor  types,  non-small  cell  lung  cancer,  or  NSCLC,  and  urothelial  cancer.  EMERGE  is  the  first  of  our
Phase 2 clinical trials designed based on the relationship between the ICOS hi CD4 T cells and potential clinical benefit. We expect to report
EMERGE data including preliminary efficacy and biomarker relationships to clinical outcomes for up to 40 NSCLC patients in the second half of
2020.

In addition to EMERGE, we are in the planning stages of a randomized Phase 2 clinical trial, which we refer to as SELECT. SELECT is
designed to evaluate the efficacy of vopratelimab in combination with JTX-4014, our anti-PD-1 antibody, compared to JTX-4014 alone in
biomarker-selected, immunotherapy-naive second-line NSCLC patients. We have identified TISvopra, an 18 gene RNA Tumor Inflammation
Signature used with a vopratelimab-specific threshold, as a baseline predictive biomarker associated with the emergence of ICOS hi CD4 T
cells. We expect to initiate SELECT in mid-2020 and to report interim clinical data in 2021.

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 completed enrollment in a Phase 1
clinical  trial  of  JTX‑4014  monotherapy  that  was  designed  to  assess  safety,  and  we  have  determined  the  recommended  Phase  2  dose.  We
presented  safety  and  preliminary  efficacy  data  from  this  Phase  1  clinical  trial  at  the  November  2019  annual  meeting  of  the  Society  for
Immunotherapy of Cancer. Based on the results of this clinical trial, we plan to use JTX-4014 in combination with our other product candidates,
including in combination with vopratelimab in SELECT.

JTX-1811 is the most recent product candidate to emerge from our Translational Science Platform. JTX-1811 is a monoclonal antibody
designed to selectively deplete T regulatory cells in the tumor microenvironment, or TME. The function of T regulatory cells is to suppress an
ongoing-immune response, and by depleting these immunosuppressive cells, we aim to foster more productive immune responses within the
TME.

Our  product  candidate  JTX-8064  was  exclusively  licensed  to  Celgene  Corporation,  or  Celgene,  in  July  2019.  Celgene  was  subsequently
acquired by Bristol-Myers Squibb Company, or BMS. JTX-8064 is an antibody that binds to LILRB2, which is a cell surface receptor expressed
on  macrophages.  JTX-8064  was  the  first  tumor-associated  macrophage  candidate  to  emerge  from  our  Translational  Science  Platform.  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.

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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 T-regulatory cells, macrophages and 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. We expect to select a new development candidate and commence IND-enabling studies later
in 2019.

On July 22, 2019, we entered into a License Agreement, or the Celgene License Agreement, with Celgene. Pursuant to the Celgene License
Agreement,  we  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 us as of July 22, 2019 that is specifically directed to the LILRB2 receptor (a Licensed Compound).

The Celgene License Agreement provides Celgene with the sole right, at its sole cost and expense, to develop, seek regulatory approval for,
manufacture and commercialize the Licensed Compounds and any product that comprises a Licensed Compound (each a Licensed Product)
for  all  uses  and  purposes.  Celgene  is  obligated  to  use  commercially  reasonable  efforts  to  develop,  seek  regulatory  approval  for  and
commercialize at least one Licensed Product comprising or incorporating the Initial Licensed Compound (any such Licensed Product, an Initial
Licensed Product).

Under the terms of the Celgene License Agreement, Celgene paid us a one-time, non-refundable upfront payment of $50.0 million in July 2019.
We are entitled to receive payments from Celgene upon the achievement of specified clinical, regulatory and sales milestones with respect to
the first Initial Licensed Product to achieve such milestones, including potential clinical and regulatory milestone payments up to an aggregate
total of $180.0 million and potential sales milestone payments up to an aggregate total of $300.0 million. We are eligible to receive royalties at
percentage rates ranging from mid-single-digits to low-double-digits, based on future annual net sales of the Initial Licensed Products, on an
Initial Licensed Product-by-Initial Licensed Product and country-by-country basis.

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  private  placements  of  our  convertible  preferred  stock,  proceeds  received  from  our  IPO,  the  upfront  payment  of  $225.0  million
received  in  connection  with  the  Celgene  Collaboration  Agreement,  the  upfront  payment  of  $50.0  million  received  in  connection  with  the
Celgene License Agreement and proceeds received from our “at the market” offering program, or the ATM Offering.

Due  to  our  significant  research  and  development  expenditures,  we  have  accumulated  substantial  losses  since  our  inception.  As  of
December  31,  2019,  we  had  an  accumulated  deficit  of  $107.2 million.  We  expect  to  incur  substantial  additional  losses  in  the  future  as  we
expand our research and development activities.

Financial Operations Overview

Revenue

For  the  year  ended  December  31,  2019,  we  recognized  $147.9  million  of  license  and  collaboration  revenue.  This  was  comprised  of  $50.0
million of license revenue recognized under the Celgene License Agreement and $97.9 million of collaboration revenue recognized under the
Celgene Collaboration Agreement related to the $225.0 million upfront payment received in 2016. The Celgene Collaboration Agreement was
terminated effective July 22, 2019, and all remaining deferred revenue was recognized as we have no further performance obligations.

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In  the  future,  we  may  generate  revenue  from  product  sales  or  collaboration  agreements,  strategic  alliances  and  licensing  arrangements,
including the Celgene 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 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
academic  and  non-profit  institutions,  contract  research  organizations,  contract  manufacturing  organizations  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:

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•

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;

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

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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. We
do not expect to incur future external costs for JTX-8064 as a result of our entry into the Celgene License Agreement in July 2019.

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

(in thousands)

Vopratelimab

JTX-4014

JTX-8064

JTX-1811

Pre-development candidates

Total external research and development and clinical and regulatory costs

Year Ended December 31,

2019

2018

16,778   $
2,785  
5,225  
138  
950  
25,876   $

19,661

7,585

2,754

—

1,169

31,169

$

$

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 Phase 2 EMERGE clinical trial of vopratelimab;

initiate additional clinical trials of vopratelimab and JTX-4014, including our Phase 2 SELECT clinical trial;

complete our Phase 1 clinical trial of JTX-4014;

complete our Phase 1/2 ICONIC clinical trial of vopratelimab;

continue our IND-enabling activities for JTX-1811;

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 later stages of development.

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.

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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, we evaluate our estimates which include, but are not limited to, the determination
of the discount rate utilized in the initial application of Accounting Standard Codification, or ASC, Topic 842, Leases, accrued expenses, stock-
based compensation expense and income taxes. In addition, through July 2019, we made estimates related to revenue recognized under the
Celgene Collaboration Agreement, including estimates of internal and external costs expected to be incurred to satisfy performance obligations.
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.

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.  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 and the Celgene 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.

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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  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.

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Results of Operations

Comparison of the Years Ended December 31, 2019 and 2018

The following table summarizes our results of operations for the years ended December 31, 2019 and 2018:

(in thousands)

Revenue:

License and collaboration revenue—related party

Operating expenses:

Research and development

General and administrative

Total operating expenses

Operating income (loss)

Other income, net          

Income (loss) before provision for income taxes

Provision for income taxes

Net income (loss)

License and Collaboration Revenue

Year Ended December 31,

2019

2018

$ Change

$

$

147,872   $

65,201   $

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

70,052  
26,443  
96,495  
(31,294)  
3,961  
(27,333)  
46  
(27,379)   $

82,671

(2,917)

1,477

(1,440)

84,111

91

84,202

—

84,202

License and collaboration revenue for the year ended December 31, 2019 was comprised of $50.0 million of license revenue recognized under
the Celgene License Agreement and $97.9 million of collaboration revenue resulting from the recognition all remaining deferred revenue from
the  upfront  payment  we  received  in  July  2016  under  the  Celgene  Collaboration  Agreement,  which  was  terminated  effective  July  22,  2019.
License  and  collaboration  revenue  for  the  year  ended  December  31,  2018  was  solely  related  to  the  recognition  of  the  upfront  payment  we
received under the Celgene Collaboration Agreement. Prior to the termination of the Celgene Collaboration Agreement, we were recognizing
revenue over time as the services related to each performance obligation were rendered.

Research and Development Expenses

The following table summarizes our research and development expenses for the years ended December 31, 2019 and 2018:

(in thousands)

Employee compensation

External research and development

External clinical and regulatory

Lab consumables

Research consulting

Facility costs

Other research

Total research and development expenses

Year Ended December 31,

2019

2018

$ Change

$

$

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

21,898   $
14,492  
16,677  
7,694  
1,601  
5,726  
1,964  
70,052   $

3,104

(6,030)

737

(853)

(684)

87

722

(2,917)

Research and development expenses decreased by $2.9 million from $70.1 million for the year ended December 31, 2018 to $67.1 million for
the year ended December 31, 2019. The decrease in research and development expenses was primarily attributable to:

•

•

$6.0 million of decreased external research and development costs primarily attributable to vopratelimab manufacturing expenses and
JTX-4014  IND-enabling  expenses  incurred  during  the  year  ended  December  31,  2018,  partially  offset  by  increased  JTX-8064  IND-
enabling expenses incurred during the year ended December 31, 2019; and

$0.9 million of decreased lab consumables costs.

These decreases were partially offset by $3.1 million of increased employee compensation costs primarily arising from increased personnel.

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General and Administrative Expenses

The following table summarizes our general and administrative expenses for the years ended December 31, 2019 and 2018:

(in thousands)

Employee compensation

Professional services

Facility costs

Other

Total general and administrative expenses

Year Ended December 31,

2019

2018

$ Change

$

$

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

12,570   $
5,359  
4,516  
3,998  
26,443   $

1,036

(225)

64

602

1,477

General and administrative expenses increased by $1.5 million from $26.4 million for the year ended December 31, 2018 to $27.9 million for
the year ended December 31, 2019. The increase in general and administrative expenses was primarily attributable to $1.0 million of increased
employee compensation costs, including $0.4 million of increased stock-based compensation expense, and $0.6 million of increased other
general and administrative costs to support our operations.

Other Income, net

Other  income,  net,  increased  by  $0.1  million  from  $4.0  million  for  the  year  ended  December  31,  2018  to  $4.1  million  for  the  year  ended
December  31,  2019.  The  change  in  other  income,  net,  is  attributable  to  increased  interest  and  investment  income  on  our  cash,  cash
equivalents and investments as a result of an overall increased rate of return.

Liquidity and Capital Resources

Sources of Liquidity

We have funded our operations primarily through gross proceeds from private placements of our convertible preferred stock of $139.1 million,
net  proceeds  from  our  IPO  of  $106.4  million,  a  non-refundable  upfront  payment  of  $225.0  million  received  in  connection  with  the  Celgene
Collaboration Agreement, a non-refundable upfront payment of $50.0 million received in connection with the Celgene License Agreement and
net  proceeds  from  our  ATM  Offering  of  $3.5 million.  As  of  December  31,  2019,  we  had  cash,  cash  equivalents  and  investments  of  $170.4
million.

On December 17, 2019, we entered into a Sales Agreement with Cowen and Company, LLC, or Cowen, pursuant to which we may offer and
sell 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, 2019, we had sold an aggregate of 447,847 shares under the ATM Offering at an average price of $8.57 per share for net
proceeds of $3.5 million after deducting sales commissions and offering expenses. Subsequent to December 31, 2019 and through the filing
date of this Annual Report on Form 10-K, we sold an aggregate of 200,998 shares under the ATM Offering at an average price of $8.46 per
share for net proceeds of $1.6 million.

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 $107.2 million through December 31, 2019. We expect to incur substantial additional losses in the future as
we expand our research and development activities and continue to

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advance our programs. Based on our research and development plans, we expect that our existing cash, cash equivalents and investments of
$170.4 million will enable us to fund our operating expenses and capital expenditure requirements through the end of 2021. 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;

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;

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 effectiveness of which is subject to certain conditions; and

the  terms  and  timing  of  any  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.

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Cash Flows

The following table provides information regarding our cash flows for the years ended December 31, 2019 and 2018:

(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,

2019

2018

$

$

  $

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

(63,613)

86,414

1,546

24,347

Net  cash  used  in  operating  activities  for  the  year  ended  December  31,  2019  was  $30.1  million,  compared  to  net  cash  used  in  operating
activities of $63.6 million for the year ended December 31, 2018. Cash used in operating activities decreased by $33.5 million primarily due to
the $50.0 million non-refundable upfront payment received under the Celgene License Agreement during the year ended December 31, 2019.
We received $16.8 million of state and federal income tax refunds during the year ended December 31, 2018.

Cash Provided by Investing Activities

Net cash provided by investing activities for the year ended December 31, 2019 was $31.4 million, compared to net cash provided by investing
activities of $86.4 million for the year ended December 31, 2018. Cash provided by investing activities decreased by $55.0 million primarily due
to decreased proceeds from maturities and sales of investments, partially offset by decreased purchases of investments, during the year ended
December 31, 2019 as compared to the year ended December 31, 2018.  Proceeds  received  from  maturities  and  sales  of  investments  were
either re-invested or used to fund operations.

Cash Provided by Financing Activities

Net cash provided by financing activities for the year ended December 31, 2019 was $4.1 million, compared to net cash provided by financing
activities  of  $1.5 million  for  the  year  ended  December  31,  2018.  Cash  provided  by  financing  activities  increased  by  $2.5  million  due  to  the
receipt of $3.5 million of net proceeds from our ATM Offering, partially offset by a decrease in proceeds received from the exercise of stock
options during the year ended December 31, 2019 as compared to the year ended December 31, 2018.

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, 2019. The term “disclosure controls

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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,  2019,  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.

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, 2019 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, 2019.

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, 2019 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 21, 2020, 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.

Robert Tepper, M.D.

Director Biographies

Age

49

55

65

52

75

64

61

57

64

  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
2009 to June 2016 and as treasurer from 2010 to September 2016. She has served on the board of directors of Adaptimmune Therapeutics plc
since June 2016, Immunomedics, Inc. since March 2019, ObsEva SA since December 2016, Ovid Therapeutics, Inc. since June 2017, Aevi
Genomic Medicine, Inc. (formerly Medgenics, Inc.) from June 2015 to February 2020 and Innoviva, Inc. from September 2016 to April 2018,
each of which is a public therapeutics company. 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 Auron Therapeutics,
Inc., which are all 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 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

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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.

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  has  served  on  the  board  of  directors  of  Neon  Therapeutics,  Inc.,  a  public  immuno-oncology
company, since 2015 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 was the chief executive officer of
the Celgene Cellular Therapeutics division of Celgene Corporation, or Celgene, a global biopharmaceutical company, from May 2013 until his
retirement in December 2015. Mr. Karsen served as executive vice president and chief operations officer of Celgene from 2010 to May 2013,
and  as  senior  vice  president  and  head  of  worldwide  business  development  of  Celgene  from  2004  to  2009.  He  is  a  member  of  the  board  of
directors  of  Intellia  Therapeutics,  Inc.,  a  public  genome  editing  company,  and  has  served  as  the  chairman  since  April  2016.  Previously,  Mr.
Karsen served on the boards of directors of 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, Alliqua Biomedical, Inc. from November 2012 to
February 2016, and Navidea Biopharmaceuticals, Inc. from February 2014 to July 2015, 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 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 has served
as a director of Neon Therapeutics, Inc., a public immuno-oncology company, since May 2015 and is currently the chairman of the board; he
also serves on the boards of directors for several private companies, including Casma Therapeutics, Inc., Rheos Medicines, Inc. and Tango
Therapeutics, Inc. From August 2009 to September 2016, Dr. Pfeffer was a member of the board of directors of Eleven Biotherapeutics, Inc., a
public  biologics  oncology  company,  and  served  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.

Robert Tepper, M.D.—Dr. Tepper is a partner at TRV, a position he has held since he co-founded TRV in 2007. From February 2013 to January
2015, Dr. Tepper served as our interim chief scientific officer. He also served as interim chief science officer of Casma Therapeutics, Inc. from
May  2018  to  December  2018,  and  of  Neon  Therapeutics,  Inc.  from  October  2015  to  November  2016.  Dr.  Tepper  serves  on  the  boards  of
directors of Allena Pharmaceuticals, Inc., a public biopharmaceutical company, Constellation Pharmaceuticals, Inc., a public biopharmaceutical
company, and Neon Therapeutics, Inc., a public immuno-oncology company, and Casma Therapeutics, Inc., a private biotechnology company.
Previously, Dr. Tepper served on the board of directors of bluebird bio, Inc., a public biopharmaceutical

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company, from September 2010 through March 2015, Kala Pharmaceuticals, Inc., a public biopharmaceutical company, from December 2009
through June 2018 and various other private life science companies. Dr. Tepper received an M.D. from Harvard Medical School and an A.B. in
biochemistry from Princeton University. We believe that Dr. Tepper is qualified to serve on our board of directors due to his experience in the
venture capital industry, particularly with biotech and pharmaceutical companies, combined with his experience building and leading research
and development operations, serving on the boards of public and private life sciences companies and as faculty and advisory board members
of several healthcare institutions.

Executive Officers

The following table sets forth our executive officers as of February 21, 2020.

Name
Richard Murray, Ph.D.(1)
Kimberlee C. Drapkin

Hugh M. Cole

Elizabeth G. Trehu, M.D.

Age

61

52

54

59

  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 director of the Company 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 III Directors” and
“Corporate Governance” and “Delinquent Section 16(a) Reports,” if applicable, in our definitive Proxy Statement for our 2020 Annual Meeting of
Stockholders to be filed with the SEC within 120 days of December 31, 2019, 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 2020 Annual Meeting of Stockholders to be filed with the SEC within 120 days of December 31, 2019, which information is
incorporated herein by reference.

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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  2020  Annual  Meeting  of  Stockholders  to  be  filed  with  the  SEC  within  120  days  of
December 31, 2019, 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  2020  Annual  Meeting  of  Stockholders  to  be  filed  with  the  SEC  within  120  days  of
December 31, 2019, which information is incorporated herein by reference.

Item 14. Principal Accounting Fees and Services

The information required by this Item 14 will be included in the section captioned “Ratification of Selection of Independent Registered Public
Accounting Firm” in our definitive Proxy Statement for our 2020 Annual Meeting of Stockholders to be filed with the SEC within 120 days of
December 31, 2019, 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 Income (Loss)
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, 2019 and
2018, the related consolidated statements of operations and comprehensive income (loss), stockholders' equity and cash flows for each of the
two years in the period ended December 31, 2019, 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,
2019  and  2018,  and  the  results  of  its  operations  and  its  cash  flows  for  each  of  the  two  years  in  the  period  ended  December  31,  2019,  in
conformity with U.S. generally accepted accounting principles.

Adoption of ASC 842

As discussed in Note 2 to the consolidated financial statements, the Company changed its method of accounting for leases effective January 1,
2019 due to the adoption of Accounting Standards Update (ASU) 2016-02, Leases (Topic 842), and the related amendments.

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 27, 2020

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

Deferred revenue, net of current portion—related party

Operating lease liability, net of current portion

Other non-current liabilities

Total liabilities

Commitments and contingencies (Note 13)

Stockholders’ equity:

Preferred stock, $0.001 par value: 5,000 shares authorized at December 31, 2019 and 2018; no shares issued or
outstanding at December 31, 2019 or 2018

Common stock, $0.001 par value: 160,000 shares authorized at December 31, 2019 and 2018; 33,738 and 32,948
shares issued at December 31, 2019 and 2018, respectively; 33,738 and 32,941 shares outstanding at December 31,
2019 and 2018, respectively

Additional paid-in capital

Accumulated other comprehensive income (loss)

Accumulated deficit

Total stockholders’ equity

Total liabilities and stockholders’ equity

December 31,

2019

2018

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  

—  

34  
281,664  
54  

(107,159)
174,593  
205,882   $

47,906

141,968

2,335

192,209

13,540

5,990

—

2,713

214,452

3,272

6,952

55,157

—

165

65,546

42,715

—

2,062

110,323

—

33

268,081

(78)

(163,907)

104,129

214,452

$

$

$

$

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

F-2

 
 
 
 
   
 
   
 
   
 
   
 
 
   
 
Table of Contents

Jounce Therapeutics, Inc.
Consolidated Statements of Operations and Comprehensive Income (Loss)
(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 income (loss)

Other income, net          

Income (loss) before provision for income taxes

Provision for income taxes

Net income (loss)

Net income (loss) per share, basic

Net income (loss) per share, diluted

Weighted-average common shares outstanding, basic

Weighted-average common shares outstanding, diluted

Comprehensive income (loss):

Net income (loss)

Other comprehensive income:

Unrealized gain on available-for-sale securities               

Comprehensive income (loss)

Year Ended December 31,

2019

2018

$

147,872

$

65,201

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   $

70,052

26,443

96,495

(31,294)

3,961

(27,333)

46

(27,379)

(0.84)

(0.84)

32,567

32,567

(27,379)

331

(27,048)

$

$

$

$

$

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

F-3

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

Balance at December 31, 2017

Exercise of stock options

Vesting of restricted stock awards

Stock-based compensation expense

Other comprehensive income

Cumulative effect adjustment upon adoption of ASC 606

Net loss

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

Common Stock

Shares

Amount

Additional Paid-In
Capital

Accumulated Other
Comprehensive
(Loss) Income

Accumulated
Deficit

Total Stockholders’
Equity

32,249

  $

683

9
—  
—  
—  
—  

32,941

448

185

164
—  
—  
—  
—  

32

  $

1
—  
—  
—  
—  
—  

33

1
—  

—  
—  
—  
—  
—  

257,101   $
1,545  
28  
9,407  
—  
—  
—  
268,081  

3,510  
437  

27  
9,609  
—  
—  
—  

33,738

  $

34

  $

281,664   $

(409)

  $

(89,615)

  $

167,109

—  
—  
—  
331  
—  
—  

(78)

—  
—  

—  
—  
132  
—  
—  
54   $

—  
—  
—  
—  

(46,913)

(27,379)

(163,907)

—  
—  

—  
—  
—  

(75)
56,823  

(107,159)

  $

1,546

28

9,407

331

(46,913)

(27,379)

104,129

3,511

437

27

9,609

132

(75)

56,823

174,593

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

F-4

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

Operating activities:

Net income (loss)

Adjustments to reconcile net income (loss) 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:

Taxes receivable

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

Proceeds from sales 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 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

Supplemental cash flow information:

Cash paid for lease liabilities

Cash paid for income taxes

Year Ended December 31,

2019

2018

$

56,823   $

(27,379)

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   $

9,407

3,831

(1,107)

16,737

873

—

562

(1,443)

(65,201)

107

(63,613)

(252,918)

336,694

3,997

(1,359)

86,414

—

1,546

1,546

24,347

24,829

49,176

31

—

—

—

$

$

$

$

$

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. 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, 2019, the Company had cash, cash equivalents, and investments of $170.4 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 27, 2020, 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., which was established in July
2016. 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, the determination of the discount rate utilized in the initial application of ASC Topic 842, Leases
(“ASC  842”),  accrued  expenses,  stock-based  compensation  expense  and  income  taxes.  In  addition,  through  July  2019,  the  Company  made
estimates  related  to  revenue  recognized  under  the  Master  Research  and  Collaboration  Agreement  (the  “Celgene  Collaboration  Agreement”)
with  Celgene  Corporation  (“Celgene”),  including  estimates  of  internal  and  external  costs  expected  to  be  incurred  to  satisfy  performance
obligations. 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

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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.

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,  and  construction  in  progress.  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.

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

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transaction  price  that  is  allocated  to  the  respective  performance  obligation  when  (or  as)  the  performance  obligation  is  satisfied.  See  Note  3,
“Celgene Agreements”, 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.

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 income (loss).

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 income (loss) 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 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.

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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.

Comprehensive Income (Loss)

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

Net Income (Loss) per Share

Basic net income (loss) 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 income (loss) 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.

Recent Accounting Pronouncements

In February 2016, the FASB issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842), which requires a lessee to recognize
assets and liabilities on the balance sheet for operating leases and changes many key definitions, including the definition of a lease. The new
standard includes a short-term lease exception for leases with a term of 12 months or less, as part of which a lessee can make an accounting
policy  election  not  to  recognize  lease  assets  and  lease  liabilities.  Lessees  will  continue  to  differentiate  between  finance  leases  (previously
referred  to  as  capital  leases)  and  operating  leases  using  classification  criteria  that  are  substantially  similar  to  the  previous  guidance.  In  July
2018,  the  FASB  also  issued  ASU  2018-11,  Leases  (Topic  842):  Targeted  Improvements,  which  permits  entities  to  continue  applying  legacy
guidance in ASC Topic 840, Leases (“ASC 840”), including its disclosure requirements, in the comparative periods presented in the year that
the entity adopts the new leasing standard. Under this transition method, the cumulative effect of initially applying ASC 842 is recognized as an
adjustment to the opening balance of retained earnings or accumulated deficit at the beginning of the annual reporting period that includes the
date of initial

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application.  The  new  standard  became  effective  for  annual  reporting  periods  beginning  after  December  15,  2018,  including  interim  periods
within those annual reporting periods.

Accordingly, the Company adopted ASC 842 on January 1, 2019 using the transition method permitted by ASU 2018-11. 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, the Company elected a practical expedient related to not separating lease and nonlease components. In addition,
as discussed above, an entity may elect an accounting policy whereby it does not apply the recognition requirements of ASC 842 to short-term
leases with a term of 12 months or less. Under this accounting policy, an entity does not recognize a right-of-use asset or lease liability on its
balance sheet and instead recognizes lease payments as an expense on a straight-line basis over the lease term. The Company has elected
this short-term lease accounting policy.

Upon the adoption of ASC 842, the Company removed its legacy deferred rent balances that were previously recorded under ASC 840 and
established  an  operating  lease  right-of-use  asset  of  $20.2 million,  an  operating  lease  liability,  current  of  $2.6 million  and  an  operating  lease
liability, net of current portion of $19.8 million, all relating to the Company’s existing operating lease for its current corporate headquarters. The
Company also recorded an increase to the opening balance of accumulated deficit of less than $0.1 million as a result of the adoption of ASC
842. The following table presents a summary of the amount by which each financial statement line item was affected by the adoption of ASC
842 (in thousands):

Operating lease right of use asset

Operating lease liability, current

Other current liabilities

Operating lease liability, net of current portion

Other non-current liabilities

Accumulated deficit

Prior to the Adoption of ASC
842

January 1, 2019

Effect of Adoption

Subsequent to the Adoption
of ASC 842

$

$

$

$

$

$

—   $
—   $
165   $
—   $
2,062   $
  $

(163,907)

20,156   $
2,563   $
(61)   $
19,790   $
(2,062)   $
(75)   $

20,156

2,563

104

19,790

—

(163,982)

The adoption of ASC 842 did not have a material impact on the consolidated statements of operations and comprehensive income (loss) or the
consolidated statement of cash flows for the year ended December 31, 2019.

The Company subsequently measures its lease liability at the present value of remaining lease payments, discounted using the discount rate
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. See Note 13, “Commitments and Contingencies”, for further information on the application of ASC 842 to the Company’s
operating lease for its current corporate headquarters.

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.

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In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based
Payment Accounting. This guidance is intended to simplify the accounting for stock-based payments to nonemployees by aligning it with the
accounting  for  stock-based  payments  to  employees,  with  certain  exceptions.  This  guidance  became  effective  for  annual  reporting  periods
beginning after December 15, 2018, including interim periods within those annual reporting periods. Accordingly, the Company adopted ASU
2018-07  effective  January  1,  2019,  and  there  was  no  impact  to  the  consolidated  financial  statements  as  a  result  of  the  adoption  of  this
guidance.

In  August  2018,  the  FASB  issued  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 will be effective for annual reporting periods beginning after December 15, 2019, including interim periods within those annual
reporting periods, and early adoption is permitted. More specifically, an entity is permitted to early adopt any removed or modified disclosure
requirements immediately and delay adoption of additional disclosure requirements until the effective date of this guidance. The Company does
not anticipate a material impact to the consolidated financial statements as a result of 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 will
be effective for annual reporting periods beginning after December 15, 2019, including interim periods within those annual reporting periods,
and early adoption is permitted. The amendments in this update should be applied either retrospectively or prospectively to all implementation
costs incurred after the date of adoption. The Company intends to adopt this guidance prospectively, and it does not anticipate a material
impact to the consolidated financial statements as a result of 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 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 will be effective
for  annual  reporting  periods  beginning  after  December  15,  2019,  including  interim  periods  within  those  annual  reporting  periods,  and  early
adoption is permitted. The Company does not anticipate a material impact to the consolidated financial statements as a result of the adoption of
this guidance.

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. This guidance will be effective for annual reporting periods beginning after December 15, 2020, including interim periods within those
annual  reporting  periods,  and  early  adoption  is  permitted.  The  Company  is  currently  evaluating  the  potential  impact  that  ASU  2019-12  may
have on the consolidated financial statements.

3.     Celgene Agreements

Celgene License Agreement

On July 22, 2019, the Company entered into a License Agreement (the “Celgene License Agreement”) with 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  (“LILRB2”)  (the  “Licensed
Compounds”). In November

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2019, Bristol-Myers Squibb Company (“BMS”) completed its acquisition of Celgene, and Celgene is now a wholly-owned subsidiary of BMS.

The Celgene License Agreement provides Celgene with the sole right, at its sole cost and expense, to develop, seek regulatory approval for,
manufacture and commercialize the Licensed Compounds and any product that comprises a Licensed Compound (each a “Licensed Product”)
for  all  uses  and  purposes.  Celgene  is  obligated  to  use  commercially  reasonable  efforts  to  develop,  seek  regulatory  approval  for  and
commercialize at least one Licensed Product comprising or incorporating the Initial Licensed Compound (any such Licensed Product, an “Initial
Licensed Product”). During the term of the license, the Company is prohibited from developing, manufacturing or commercializing any product
that contains an antibody or other biologic that is specifically directed to LILRB2 or any related antibody or related biologic.

Milestone and Royalties

Under the terms of the Celgene License Agreement, Celgene paid the Company a one-time, non-refundable upfront payment of $50.0 million in
July 2019. The Company is also entitled to receive payments from Celgene upon the achievement of specified clinical, regulatory and sales
milestones for the first Initial Licensed Product to achieve such milestones, including potential clinical and regulatory milestone payments up to
an aggregate total of $180.0 million and potential sales milestone payments up to an aggregate total of $300.0 million.

The Company is also eligible to receive royalties at percentage rates ranging from mid-single-digits to low-double-digits, based on future annual
net sales of the Initial Licensed Products, on an Initial Licensed Product-by-Initial Licensed Product and country-by-country basis until the later
of (i) the date on which there are no longer any valid composition of matter or method of use claims within the Company’s patents or patents
jointly owned by the Company and Celgene related to the Initial Licensed Product in such country and (ii) the twelve-year anniversary of the
date of the first commercial sale of the first Initial Licensed Product in such country (the “Royalty Term”). Royalty payments may be reduced in
specified  circumstances,  including  payments  required  to  be  made  by  Celgene  to  third  parties  to  acquire  patent  rights,  up  to  an  aggregate
minimum floor, or may be reduced upon the occurrence of certain specified events, including certain compulsory licenses, or if associated with
a Licensed Product that is not an Initial Licensed Product.

Termination

Unless  terminated  earlier  in  accordance  with  its  terms,  the  Celgene  License  Agreement  provides  that  it  will  expire  (i)  on  an  Initial  Licensed
Product-by-Initial Licensed Product and country-by-country basis on the date of the expiration of the Royalty Term with respect to such Initial
Licensed Product in such country and (ii) in its entirety upon the expiration of all applicable Royalty Terms with respect to the Initial Licensed
Products in all countries, following which the applicable licenses under the License Agreement will become fully paid-up, perpetual, irrevocable
and royalty-free.

Celgene  may  terminate  the  License  Agreement  for  convenience,  in  its  sole  discretion,  in  its  entirety  or  on  a  Licensed  Product-by-Licensed
Product  or  country-by-country  basis,  at  any  time  with  prior  written  notice  to  the  Company.  The  License  Agreement  may  be  terminated  in  its
entirety  or  on  a  Licensed  Product-by-Licensed  Product  or  country-by-country  basis  by  either  the  Company  or  Celgene  upon  the  uncured
material  breach  of  the  other  party.  If  the  material  breach  relates  solely  to  a  particular  Licensed  Product,  the  non-breaching  party  may  only
terminate  the  License  Agreement  with  respect  to  such  Licensed  Product.  Either  the  Company  or  Celgene  may  terminate  the  License
Agreement in the event of the bankruptcy or insolvency of the other party. The License Agreement provides that upon termination by Celgene
for material breach with respect to a Licensed Product, Celgene will be released from its development, manufacturing and commercialization
obligations  with  respect  to  such  Licensed  Product.  Upon  termination  by  the  Company  due  to  Celgene’s  material  breach  or  by  Celgene  for
convenience, the licenses granted by the Company under the License Agreement will terminate and Celgene will grant to the Company, subject
to  negotiation  regarding  economic  terms,  a  non-exclusive,  worldwide  license  to  develop,  manufacture  and  commercialize  the  terminated
Licensed Products.

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.

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Identification of Promises and Performance Obligations

The  Company  determined  that  the  Celgene  License  Agreement  contains  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 convey
a material right to Celgene. Accordingly, these options are not considered to be promises within the Celgene License Agreement.

The Company assessed the above promises and concluded that the JTX-8064 License is 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 represents 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 represents an element of fixed consideration under the Celgene License Agreement.

The  Company  also  evaluated  as  possible  variable  consideration  the  milestones  and  royalties  discussed  above.  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  as  it  is  not  probable  that  a  significant  reversal  in  the  amount  of  cumulative  revenue
recognized will not occur. As for royalties and sales milestones, the Company determined that the royalties and milestones relate 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 will not recognize revenue related to these royalties and sales milestones
until the associated sales occur and relevant thresholds are met.

Based  upon  the  above  considerations,  the  Company  concluded  that  the  initial  transaction  price  associated  with  the  Celgene  License
Agreement consists 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 represents the sole performance obligation in the Celgene License Agreement, the
entirety of the $50.0 million transaction price has been allocated to this performance obligation.

Recognition of Revenue

The  Company  determined  that  the  JTX-8064  License  is  a  functional  license  as  the  underlying  IP  has  significant  standalone  functionality.  In
addition, the Company determined that the JTX-8064 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 July 22, 2019 represents (i) the date at which the Company made available the IP to Celgene and
(ii) the beginning of the period during which Celgene is able to use and benefit from its right to use the IP. Based upon these considerations, the
Company recognized $50.0 million of license revenue during the year ended December 31, 2019 under the Celgene License Agreement.

Celgene Collaboration Agreement

In July 2016, the Company entered into the Celgene Collaboration Agreement. 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

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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 Company’s initial public offering (“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 3 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  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

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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.

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.

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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. Following the termination of the Celgene Collaboration Agreement, which was effective July 22, 2019, the Company has no further
performance obligations. Accordingly, all remaining deferred revenue related to the Celgene Collaboration Agreement was recognized during
the three months ended September 30, 2019.

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.

The  following  table  presents  changes  in  the  Company’s  contract  liabilities  related  to  the  Celgene  Collaboration  Agreement  during  the  year
ended December 31, 2019 (in thousands):

Balance as of

January 1, 2019

Additions

Reductions

December 31, 2019

Balance as of

Contract liabilities:

Deferred revenue—related party

Totals

$

$

97,872   $
97,872   $

—   $
—   $

(97,872)   $
(97,872)   $

—

—

The reductions to the deferred revenue contract liability during the year ended December 31, 2019 were comprised of revenue recognized for
research  and  development  services  performed  during  the  period,  including  the  recognition  of  the  remaining  transaction  price  upon  the
termination of the Celgene Collaboration Agreement. All revenue recognized during the year ended December 31, 2019 related to the Celgene
Collaboration Agreement was included within the beginning balance of the deferred revenue contract liability.

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.

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Assets measured at fair value on a recurring basis as of December 31, 2019 were as follows (in thousands):

Total

Quoted Prices in Active
Markets for Identical
Assets (Level 1)

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   $

—

—

—

—

—

Assets measured at fair value on a recurring basis as of December 31, 2018 were as follows (in thousands):

Total

Quoted Prices in Active
Markets for Identical
Assets (Level 1)

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

$

$

41,434   $

41,434   $

—   $

67,843  
53,758  
32,829  
195,864   $

—  
53,758  
32,829  
128,021   $

67,843  
—  
—  
67,843   $

—

—

—

—

—

There were no changes in valuation techniques during the years ended December 31, 2019 or 2018. There were no liabilities measured at fair
value on a recurring basis as of December 31, 2019 or 2018.

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, 2019 were comprised as follows (in thousands):

Amortized Cost

December 31, 2019
  Unrealized Gains   Unrealized Losses  

Fair Value

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

$

F-17

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)

—  

—

50,242

46,699

59,082

12,820

168,843

1,601

1,601

(6)

$

170,444

 
 
 
 
 
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
 
 
 
 
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Cash equivalents, short-term investments and long-term investments as of December 31, 2018 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

Government agency securities

Total long-term investments

Total cash equivalents and investments

Amortized Cost

December 31, 2018
  Unrealized Gains   Unrealized Losses  

Fair Value

$

$

41,434   $
65,887  
53,765  
28,866  
189,952  

2,001  
3,989  
5,990  
195,942   $

—   $
2  
1  
—  
3  

—  
8  
8  
11   $

—   $
(39)  
(8)  
(34)  
(81)  

(8)  
—  
(8)  
(89)   $

41,434

65,850

53,758

28,832

189,874

1,993

3,997

5,990

195,864

As of December 31, 2019 and 2018, the aggregate fair value of securities that were in an unrealized loss position for less than twelve months
was $28.3 million and $81.4 million, respectively. As of December 31, 2019  and  2018,  the  aggregate  fair  value  of  securities  that  were  in  an
unrealized loss position for more than twelve months was $2.0 million and $22.3 million, respectively. As of December 31, 2019, 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, 2019.

There were no  realized  gains  and  losses  on  available-for-sale  securities  during  the  year  ended  December  31,  2019. There were immaterial
realized gains and losses on available-for-sale securities during the year ended December 31, 2018.

6.     Restricted Cash

As of both December 31, 2019 and 2018, 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, 2019

Year Ended
December 31, 2018

Beginning of Period

End of Period

Beginning of Period

End of Period

Cash and cash equivalents

Restricted cash

Cash, cash equivalents and restricted cash

$

$

47,906   $
1,270  
49,176   $

F-18

53,241   $
1,270  
54,511   $

23,559   $
1,270  
24,829   $

47,906

1,270

49,176

 
 
 
   
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
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7.     Property and Equipment, Net

Property and equipment, net as of December 31, 2019 and 2018 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)

December 31,

2019

2018

5

4

3

Shorter of useful life or
remaining lease term

  $

  $

11,374   $
1,071  
1,505  

8,572  
22,522  
(11,850)  
10,672   $

10,435

1,071

1,505

8,534

21,545

(8,005)

13,540

Depreciation expense for the years ended December 31, 2019 and 2018 was $3.9 million and $3.8 million, respectively.

8.     Accrued Expenses

Accrued expenses as of December 31, 2019 and 2018 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,

2019

2018

5,147   $
3,639  
121  

8,907

$

4,063

2,796

93

6,952

$

$

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. As of December 31, 2019, the Company had sold an aggregate of 447,847
shares under the ATM Offering at an average price of $8.57 per share for net proceeds of $3.5 million after deducting sales commissions and
offering expenses.

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, 2019, no
shares of preferred stock were issued or outstanding.

F-19

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Shares Reserved for Future Issuance

As  of  December  31,  2019  and  2018,  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,

2019

2018

—  
460  
5,735  
1,288  
7,483  

7

371

5,023

1,114

6,515

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 1st 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 31st or (ii) such amount as determined by the compensation committee of the board of directors. Effective
January  1,  2018  and  2019,  1,290,609  and  1,317,935  additional  shares,  respectively,  were  automatically  added  to  the  shares  authorized  for
issuance under the 2017 Plan.

As of December 31, 2019, there were 1,288,186 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 1st 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 31st,
(ii) 603,000 shares or (iii) such amount as determined by the Compensation Committee of the Board of Directors. Effective January 1, 2018
and 2019, 322,652 and 329,483 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, 2019.

F-20

 
 
 
Table of Contents

Stock-based Compensation Expense

Total  stock-based  compensation  expense  recognized  in  the  consolidated  statements  of  operations  and  comprehensive  income  (loss)  for  the
years ended December 31, 2019 and 2018 was as follows (in thousands):

Research and development

General and administrative

Total stock-based compensation expense

RSA Activity

Year Ended December 31,

2019

2018

$

$

4,353   $
5,256  
9,609   $

4,540

4,867

9,407

Pursuant to RSA agreements originally issued under the terms of the 2013 Plan, the Company, at its discretion, has the option to repurchase
unvested shares underlying RSAs at the initial purchase price if the employees or non-employees terminate their service relationships with the
Company. The shares underlying RSAs are recorded in stockholders’ equity as they vest.

The following table summarizes RSA activity for the year ended December 31, 2019 (in thousands, except per share amounts):

Unvested as of December 31, 2018

Issued

Vested

Repurchased

Unvested as of December 31, 2019

RSAs

Weighted-Average Grant
Date Fair Value per Share

7   $
—   $
  $
(7)
—   $
—   $

—

—

—

—

—

The aggregate fair value of RSAs that vested during each of the years ended December 31, 2019 and 2018, based upon the fair values of the
stock underlying the RSAs on the day of vesting, was less than $0.1 million.

RSU Activity

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, 2019 (in thousands, except per share amounts):

Unvested as of December 31, 2018

Issued

Vested

Cancelled

Unvested as of December 31, 2019

RSUs

Weighted-Average Grant
Date Fair Value per Share

371   $
354   $
  $
  $
(108)
460   $

(157)

8.02

4.40

8.02

6.40

5.61

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. No RSUs vested during the year ended December 31, 2018.

As of December 31, 2019, there was unrecognized stock-based compensation expense related to unvested RSUs of $1.7 million,  which  the
Company expects to recognize over a weighted-average period of approximately 1.6 years.

F-21

 
 
 
 
 
 
 
Table of Contents

Stock Option Activity

The fair value of stock options granted to employees and directors during the years ended December 31, 2019 and 2018 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

Year Ended December 31,

2019

2018

2.2%  
—%  

6.0
69.4%  

2.7%

—%

6.0

65.2%

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, 2019 and 2018 was $2.76 and $12.88 per share, respectively.

The following table summarizes changes in stock option activity during the year ended December 31, 2019  (in  thousands,  except  per  share
amounts):

Outstanding at December 31, 2018

Granted

Exercised

Cancelled

Outstanding at December 31, 2019

Exercisable at December 31, 2019

Options

Weighted-Average
Exercise Price

(185)

5,023   $
1,418   $
  $
  $
(521)
5,735   $
3,586   $

10.23  
4.37  
2.36  
13.19  
8.76  
7.41  

Weighted-Average
Remaining Contractual
Term (in years)

Aggregate Intrinsic
Value

7.6   $

3,133

7.2   $
6.4   $

18,959

13,864

The  aggregate  intrinsic  value  of  stock  options  exercised  during  the  years  ended  December  31,  2019  and  2018  was  $0.6  million  and  $5.7
million, respectively.

As  of  December  31,  2019,  there  was  unrecognized  stock-based  compensation  expense  related  to  unvested  stock  options  of  $13.0  million,
which the Company expects to recognize over a weighted-average period of approximately 2.3 years.

11.   Income Taxes

The provision for income taxes for the years ended December 31, 2019 and 2018 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,

2019

2018

—   $
46  
46  

—  
—  
—  
46   $

—

46

46

—

—

—

46

$

$

F-22

 
 
 
 
 
 
 
 
   
 
   
 
   
 
 
 
 
 
   
 
   
Table of Contents

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

Change in valuation allowance

Other

Effective tax rate

Year Ended December 31,

2019

2018

21.0 %  
4.8 %  
(5.4)%  
(21.4)%  
1.1 %  
0.1 %  

21.0 %

10.3 %

12.2 %

(42.7)%

(1.0)%

(0.2)%

The principal components of the Company’s deferred tax assets and liabilities as of December 31, 2019 and 2018 were comprised as follows
(in thousands):

Deferred tax assets:

Net operating loss carryforwards

Tax credit carryforwards

Deferred revenue

Deferred lease incentive

Deferred rent

Operating lease liability

Intangibles

Accrued expenses and other

Unrealized loss on available-for-sale securities

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,

2019

2018

$

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)

$

—   $

37,417

12,751

26,739

103

476

—

552

1,091

39

2,119

81,287

(55,348)

25,939

(25,653)

—

(286)

(25,939)

—

As of December 31, 2019, the Company had federal and state net operating loss (“NOL”) carryforwards of $119.8 million and $124.2 million,
respectively. Federal NOLs generated through the year ended December 31, 2017 expire at various dates from 2034 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 2034
through 2038. As of December 31, 2019, the Company had federal research and development tax credit carryforwards of $12.7 million which
expire at various dates from 2032 through 2039. In addition, as of December 31, 2019, the Company had state research and development and
investment tax credit carryforwards of $5.2 million and $0.5 million, respectively. The state research and development tax credit carryforwards
expire at various dates from 2029 through 2034 and the state investment tax credit carryforwards expire at various dates from 2020 through
2022.

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  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 $43.2 million has been established at December 31, 2019. The decrease in the valuation allowance of $12.1 million  during  the
year ended December 31,

F-23

 
 
 
 
 
 
 
   
 
 
   
 
 
 
 
Table of Contents

2019  was  primarily  due  to  the  reversal  of  the  Company’s  deferred  revenue  deferred  tax  asset  upon  the  termination  of  the  Celgene
Collaboration Agreement and the current year utilization of NOLs.

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  Internal  Revenue  Code  (“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. Subsequent
ownership changes may further affect the limitation in future years.

The Company had no  unrecognized  tax  benefits  as  of  either  December  31,  2019  or  2018.  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
income (loss) 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  income  (loss).  As  of  December  31,  2019,  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, 2019, the Company had recorded $0.7 million of
reimbursable expenses due from Celgene within prepaid expenses and other current assets in the accompanying consolidated balance sheets.
No amounts were due to or from Celgene as of December 31, 2018.

As  discussed  within  Note  3,  “Celgene  Agreements”,  BMS  completed  its  acquisition  of  Celgene  in  November  2019,  and  Celgene  is  now  a
wholly-owned subsidiary of BMS.

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

F-24

Table of Contents

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 has recorded a right-of-use asset and a corresponding lease liability
on the consolidated balance sheets as of December 31, 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, 2019, the future minimum lease payments due under the operating lease for the Company’s corporate headquarters are
as follows (in thousands):

2020

2021

2022

2023

2024 and thereafter

Total remaining minimum rental payments

Less: effect of discounting

Total lease liability

$

$

Amount

4,380

4,505

4,633

4,764

6,143

24,425

(4,635)

19,790

The Company recorded operating lease expense for the Corporate Headquarters Lease of $4.2 million for the year ended December 31, 2019
pursuant to ASC 842. As of December 31, 2019, the remaining lease term of the Corporate Headquarters Lease was 5.3 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.

Accounting under ASC 840

Prior to the adoption of ASC 842, and pursuant to the legacy guidance within ASC 840, the Company recorded rent expense on a straight-line
basis  through  the  end  of  the  lease  term  and  also  recorded  deferred  rent  on  the  condensed  consolidated  balance  sheets.  The  Company
recorded the tenant improvement allowance as a deferred lease incentive and was amortizing the deferred lease incentive through a reduction
of rent expense ratably over the lease term.

As of December 31, 2018, the future minimum lease payments due under the Corporate Headquarters Lease were as follows (in thousands):

2019

2020

2021

2022

2023

2024 and thereafter

Total future minimum lease payments

Minimum Lease Payments

4,260

4,380

4,505

4,633

4,764

6,142

28,684

$

$

The  Company  recorded  total  rent  expense  for  the  Corporate  Headquarters  Lease  of  $4.0  million  for  the  year  ended  December  31,  2018
pursuant to ASC 840.

F-25

 
 
Table of Contents

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  $11.7  million  and  low  single-digit  royalty  payments  based  on  a
percentage of net sales of licensed products. As of December 31, 2019, the Company had made $0.5 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, 2019, the Company had made $1.0 million in
aggregate milestone payments under these collaboration agreements.

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  $0.5  million  in
contributions to the 401(k) Plan for the years ended December 31, 2019 and 2018, respectively.

15.   Net Income (Loss) per Share

The following table summarizes the calculation of basic and diluted net income (loss) per share (in thousands, except per share amounts):

Net income (loss)

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 income (loss) per share, basic

Net income (loss) per share, diluted

Years Ended December 31,

2019

2018

56,823   $

(27,379)

33,080  
1,121  
1  
92  
34,294  

1.72   $
1.66   $

32,567

—

—

—

32,567

(0.84)

(0.84)

$

$

$

The following weighted-average amounts were excluded from the calculation of diluted net income (loss) per share because their effect would
be anti-dilutive (in thousands):

Outstanding stock options

Unvested RSAs

Unvested RSUs

Total

F-26

Year Ended December 31,

2019

2018

3,727  
—  
24  
3,751  

5,573

10

146

5,729

 
 
 
 
 
   
 
 
   
 
 
 
Table of Contents

16.   Subsequent Events

Subsequent to December 31, 2019 and through the filing date of this Annual Report on Form 10-K, the Company sold an aggregate of 200,998
shares under the ATM Offering at an average price of $8.46 per share for net proceeds of $1.6 million.

F-27

Table of Contents

Exhibit No.

  Description of Exhibit

EXHIBIT INDEX

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

21.1*

23.1*

31.1*

31.2*

32.1+

101*

*

+

#

†

‡ 

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

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 (incorporated by reference to Exhibit 10.1 of the Registrant’s Quarterly Report on
Form 10-Q (File No. 001-37998) filed May 8, 2019)

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 among the Registrant, Celgene Corporation, and Celgene RIVOT LLC, dated July 22, 2019 (incorporated by reference to Exhibit
10.1 of the Registrant’s Quarterly Report on Form 10-Q (File No. 001-37998) filed November 7, 2019)

Sales Agreement, dated of December 17, 2019, by and between the Registrant and Cowen and Company, LLC (incorporated by reference to Exhibit 1.1 of
the Registrant’s Current Report on Form 8-K (File No. 001-37998) filed December 17, 2019)

  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,
  Portions of this Exhibit have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K

as amended.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
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

JOUNCE THERAPEUTICS, INC.

Date: February 27, 2020

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

Title

Date

President, Chief Executive Officer and Director (Principal
Executive Officer)

February 27, 2020

Treasurer and Chief Financial Officer
(Principal Financial and Accounting Officer)

February 27, 2020

  Chairman of the Board of Directors

February 27, 2020

/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

  Director

  Director

/s/ J. Duncan Higgons

  Director

J. Duncan Higgons

/s/ Robert Iannone

  Director

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/ Robert Tepper

Robert Tepper, M.D.

  Director

  Director

  Director

February 27, 2020

February 27, 2020

February 27, 2020

February 27, 2020

February 27, 2020

February 27, 2020

February 27, 2020

 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
   
 
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
 
 
 
   
   
 
   
 
 
 
   
   
 
   
 
 
 
   
   
 
   
   
Exhibit 4.3

DESCRIPTION OF SECURITIES REGISTERED UNDER TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

The following description of the common stock, $0.001 par value per share (the “Common Stock”), of Jounce Therapeutics, Inc.
(“us,”  “our,”  “we”  or  the  “Company”),  which  is  the  only  security  of  the  Company  registered  under  Section  12  of  the  Securities
Exchange  Act  of  1934,  as  amended  (the  “Exchange  Act”),  summarizes  certain  information  regarding  the  Common  Stock  in  our
certificate  of  incorporation,  our  amended  and  restated  by-laws  and  applicable  provisions  of  Delaware  corporate  law,  and  is
qualified by reference to our certificate of incorporation and amended and restated by-laws, which are incorporated by reference
as Exhibit 3.1 and Exhibit 3.2, respectively, to the Annual Report on Form 10-K.

Our authorized capital stock consists of 160,000,000 shares of common stock, par value $0.001 per share, and 5,000,000 shares
of preferred stock, par value $0.001 per share.

Common Stock

Annual  Meeting.  Annual  meetings  of  our  stockholders  are  held  on  the  date  designated  in  accordance  with  our  amended  and
restated  by-laws.  Written  notice  must  be  mailed  to  each  stockholder  entitled  to  vote  not  less  than  ten  nor  more  than  60  days
before  the  date  of  the  meeting.  The  presence  in  person  or  by  proxy  of  the  holders  of  record  of  a  majority  of  our  issued  and
outstanding  shares  entitled  to  vote  at  such  meeting  constitutes  a  quorum  for  the  transaction  of  business  at  meetings  of  the
stockholders.  Special  meetings  of  the  stockholders  may  be  called  for  any  purpose  only  by  the  board  of  directors  pursuant  to  a
resolution approved by the affirmative vote of a majority of the directors then in office. Except as may be otherwise provided by
applicable law, our certificate of incorporation or our amended and restated by-laws, all elections of directors shall be decided by a
plurality, and all other questions shall be decided by a majority, of the votes cast by stockholders entitled to vote thereon at a duly
held meeting of stockholders at which a quorum is present.

Voting Rights. Holders of common stock are entitled to one vote for each share held of record on all matters to be voted upon by
stockholders and do not have cumulative voting rights.

Dividends. Subject to the rights, powers and preferences of any outstanding preferred stock that we may designate and issue in
the future, and except as provided by law or in our certificate of incorporation, dividends may be declared and paid or set aside for
payment on the Common Stock out of legally available assets or funds when and as declared by our board of directors.

Liquidation, Dissolution and Winding Up. Subject to the rights, powers and preferences of any outstanding preferred stock that we
may designate and issue in the future, in the event of our liquidation, dissolution or winding up, our net assets will be distributed
pro rata to the holders of Common Stock.

Other  Rights.  Holders  of  Common  Stock  have  no  preemptive,  subscription,  redemption  or  conversion  rights.  The  rights,
preferences and privileges of holders of Common Stock are subject to and may be adversely affected by the rights of the holders
of  shares  of  any  series  of  preferred  stock  that  we  may  designate  and  issue  in  the  future.  Holders  of  Common  Stock  are  not
required to make additional capital contributions.

Preferred Stock

Our board of directors has the authority to designate and issue up to 5,000,000 shares of preferred stock in one or more series.
The  authorized  shares  of  our  preferred  stock  are  available  for  issuance  without  further  action  by  our  stockholders,  unless  such
action  is  required  by  applicable  law  or  the  rules  of  any  stock  exchange  on  which  our  securities  may  be  listed.  Our  board  of
directors may also designate the rights, powers, preferences and the relative, participating, optional or other special rights and any
qualifications, limitations and restrictions of the shares of each series of preferred stock.

No shares of preferred stock are outstanding as of the date of our Annual Report on Form 10-K with which this Exhibit 4.3 is filed
as an exhibit.

Provisions  of  Our  Certificate  of  Incorporation  and  Amended  and  Restated  By-laws  and  Delaware  Law  That  May  Have
Anti-Takeover Effects

The provisions of Delaware law and our certificate of incorporation and amended and restated by-laws could discourage or make
it more difficult to accomplish a proxy contest or other change in our management or the acquisition of control by a holder of a
substantial  amount  of  our  voting  stock.  It  is  possible  that  these  provisions  could  make  it  more  difficult  to  accomplish,  or  could
deter, transactions that stockholders may otherwise consider to be in their best interests or in our best interests. These provisions
are intended to enhance the likelihood of continuity and stability in the composition of our board of directors and in the policies
formulated  by  the  board  of  directors  and  to  discourage  certain  types  of  transactions  that  may  involve  an  actual  or  threatened
change  of  our  control.  These  provisions  are  designed  to  reduce  our  vulnerability  to  an  unsolicited  acquisition  proposal  and  to
discourage certain tactics that may be used in proxy fights. Such provisions also may have the effect of preventing changes in our
management.

Board of Directors. Our certificate of incorporation and amended and restated by-laws provide for a board of directors divided as
nearly equally as possible into three classes. Each class is elected to a term expiring at the annual meeting of stockholders held in
the third year following the year of such election. The number of directors comprising our board of directors is fixed from time to
time by the board of directors.

Removal of Directors by Stockholders. Our certificate of incorporation provides that members of our board of directors may only
be removed for cause by a vote of the holders of at least seventy-five percent (75%) of the outstanding shares entitled to vote on
the election of the directors.

Issuance  of  Preferred  Stock.  Our  board  of  directors  is  authorized,  without  further  action  by  our  stockholders,  to  issue  up  to
5,000,000  shares  of  preferred  stock  in  one  or  more  series,  and  to  fix  the  designations,  powers,  preferences  and  the  relative,
participating,  optional  or  other  special  rights,  and  any  qualifications,  limitations  and  restrictions  of  the  shares  of  each  series  of
preferred stock. The issuance of preferred stock could impede the completion of a merger, tender offer or other takeover attempt.

Stockholder Nomination of Directors. Our amended and restated by-laws provide that a stockholder must notify us in writing of any
stockholder  nomination  of  a  director  not  earlier  than  5:00  p.m.,  Eastern  Time,  on  the  120th  day  and  not  later  than  5:00  p.m.,
Eastern Time, on the 90th day prior to the first anniversary of the preceding year’s annual meeting; provided, that if the date of the
annual  meeting  is  advanced  by  more  than  30  days  before  such  anniversary  date,  delayed  by  more  than  60  days  after  such
anniversary date or if no annual meeting were held in the prior year, notice by the stockholder to be timely must be so delivered
not  later  than  5:00  p.m.,  Eastern  Time,  on  the  later  of  (x)  the  90th  day  prior  to  the  date  of  such  meeting  and  (y)  the  10th  day
following the day on which public announcement of the date of such annual meeting is first made by us.

No Action By Written Consent. Our certificate of incorporation provides that our stockholders may not act by written consent and
may only act at duly called meetings of stockholders.

Delaware Business Combination Statute. Section 203 of the General Corporation Law of the State of Delaware, which we refer to
as  the  DGCL,  is  applicable  to  us.  Section  203  of  the  DGCL  restricts  some  types  of  transactions  and  business  combinations
between a corporation and a 15% stockholder. A 15% stockholder is generally considered by Section 203 to be a person owning
15% or more of the corporation’s outstanding voting stock. Section 203 refers to a 15% stockholder as an “interested stockholder.”
Section  203  restricts  these  transactions  for  a  period  of  three  years  from  the  date  the  stockholder  acquires  15%  or  more  of  our
outstanding voting stock. With some exceptions, unless the transaction is approved by the board of directors and the holders of at
least two-thirds of the outstanding voting stock of the corporation, Section 203 prohibits significant business transactions such as:

•

•

a  merger  with,  disposition  of  significant  assets  to  or  receipt  of  disproportionate  financial  benefits  by  the  interested
stockholder, and

any other transaction that would increase the interested stockholder’s proportionate ownership of any class or series of our
capital stock.

The shares held by the interested stockholder are not counted as outstanding when calculating the two-thirds of the outstanding
voting stock needed for approval.

The prohibition against these transactions does not apply if:

•

•

prior  to  the  time  that  any  stockholder  became  an  interested  stockholder,  the  board  of  directors  approved  either  the
business combination or the transaction in which such stockholder acquired 15% or more of our outstanding voting stock,
or

the  interested  stockholder  owns  at  least  85%  of  our  outstanding  voting  stock  as  a  result  of  a  transaction  in  which  such
stockholder  acquired  15%  or  more  of  our  outstanding  voting  stock.  Shares  held  by  persons  who  are  both  directors  and
officers or by some types of employee stock plans are not counted as outstanding when making this calculation.

Exclusive Forum Selection. Our restated certificate of incorporation provides that the Court of Chancery of the State of Delaware
shall be the sole and exclusive forum for (1) any derivative action or proceeding brought on behalf of our company, (2) any action
asserting a claim of breach of a fiduciary duty owed by any of our directors, officers, or other employees to our company or our
stockholders, (3) any action asserting a claim against our company arising pursuant to any provision of the General Corporation
Law  of  the  State  of  Delaware  or  our  certificate  of  incorporation  or  amended  and  restated  bylaws,  or  (4)  any  action  asserting  a
claim  against  our  company  governed  by  the  internal  affairs  doctrine.  This  exclusive  forum  provision  would  not  apply  to  suits
brought to enforce a duty or liability created by the Exchange Act, 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, 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. There is uncertainty as to whether a court would enforce such provision with respect to claims under the Securities
Act, and our stockholders will not be deemed to have waived our compliance with the federal securities laws and the rules and
regulations thereunder.

Subsidiaries of the Registrant

Exhibit 21.1

Name

Jounce Mass Securities, Inc.

  Jurisdiction of Organization
  Massachusetts

  Percentage Ownership
  100%

 
   
   
 
   
   
 
   
   
 
   
   
 
   
   
 
   
   
 
   
   
 
   
   
Consent of Independent Registered Public Accounting Firm

Exhibit 23.1

We consent to the incorporation by reference in the following Registration Statements:

(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 and 333-230088) 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  27,  2020,  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, 2019.

/s/ Ernst & Young LLP            

Boston, Massachusetts
February 27, 2020

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 27, 2020

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 27, 2020

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, 2019, 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 27, 2020

By:

/s/ Richard Murray

Richard Murray, Ph.D.

President and Chief Executive Officer

(Principal Executive Officer)

Date: February 27, 2020

By:

/s/ Kim C. Drapkin

Kim C. Drapkin

Treasurer and Chief Financial Officer

(Principal Financial and Accounting Officer)