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Deciphera Pharmaceuticals

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FY2021 Annual Report · Deciphera Pharmaceuticals
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
______________________________________________

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

FORM 10-K

______________________________________________

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

OR

For the fiscal year ended December 31, 2021

For the transition period from                  to                
Commission file number: 001-38219
______________________________________________

DECIPHERA PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)
______________________________________________

Delaware
(State or other jurisdiction of incorporation or organization)

200 Smith Street, Waltham, MA
(Address of principal executive offices)

30-1003521
(I.R.S. Employer Identification Number)

02451
(Zip Code)

Title of each class
Common Stock, $0.01 Par Value

Registrant's telephone number, including area code: (781) 209-6400

Securities registered pursuant to Section 12(b) of the Act:
Trading Symbol(s)
DCPH

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

Name of exchange on which registered
The Nasdaq Global Select Market

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes ☐   No ☒
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ☐    No  ☒
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such

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

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter)

during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒   No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the

definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer
Non-accelerated filer

☒
☐

Accelerated filer

Smaller reporting company
Emerging growth company

☐

☐
☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards

provided pursuant to Section 13(a) of the Act.   ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section

404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ☐    No ☒
As of June 30, 2021, the last business day of the registrant's most recently completed second fiscal quarter, the aggregate market value of Common Stock held by non-affiliates of the registrant

computed by reference to the price of the registrant's Common Stock (based on the last reported sale price on the Nasdaq Global Select Market as of June 30, 2021) was $1,504,121,667. As of
January 31, 2022, there were 58,552,372 shares of Common Stock, $0.01 par value per share, outstanding.

Portions of the registrant's Proxy Statement for its 2022 Annual Meeting of Stockholders, which the registrant intends to file pursuant to Regulation 14A with the Securities and Exchange

Commission not later than 120 days after the registrant's fiscal year ended December 31, 2021, are incorporated by reference into Part III of this Annual Report on Form 10-K.

DOCUMENTS INCORPORATED BY REFERENCE

 
 
 
 
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Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.

Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.
Item 9C.

Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

Deciphera Pharmaceuticals, Inc.
Index

PART I

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

PART II

Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Reserved
Management's Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements With Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information
Disclosure Regarding Foreign Jurisdiction that Prevents Inspections

PART III

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

Item 15.
Item 16.
Signatures

Exhibits, Financial Statement Schedules
Form 10-K Summary

PART IV

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SUMMARY OF MATERIAL RISKS ASSOCIATED WITH OUR BUSINESS

Our business is subject to numerous risks and uncertainties that you should be aware of before making an investment decision. These risks include, but are not limited to, the

following:

• Our corporate strategy and restructuring plan may not be successful.

•

There is no assurance that our commercialization efforts with respect to QINLOCK® (ripretinib), referred to as QINLOCK, including, without limitation, our launch in
Germany, will be successful or that we will be able to generate revenues at the levels or on the timing we expect, or at levels or on the timing necessary to support our
goals.

• We have limited experience as a commercial company and the marketing and sale of QINLOCK or any future approved drugs may be unsuccessful or less successful than

anticipated.

•

If we are not able to obtain, or if there are delays in obtaining, required regulatory approvals for our drug and drug candidates, or if we experience a delay in drug supply,
we will not be able to commercialize our drug candidates or expand our marketing for QINLOCK in additional geographies, and our ability to generate revenue will be
materially impaired.

• Our reliance on sole source third-party suppliers could harm our ability to commercialize QINLOCK or any drug candidates that may be approved in the future.

• Our relationships with customers and third-party payors will be subject to applicable anti-kickback, fraud and abuse, and other healthcare laws and regulations, and health
information privacy and security laws, which could expose us to criminal sanctions, civil penalties, contractual damages, reputational harm, and diminished profits and
future earnings.

•

•

Failure to obtain or maintain adequate coverage and reimbursement for new or current products could limit our ability to market those products and decrease our ability to
generate revenue.

Recently enacted and future legislation may increase the difficulty and cost for us to obtain marketing approval of and commercialize our drug candidates and decrease
the prices we may obtain for our approved drug.

• QINLOCK or any current drug candidates, such as vimseltinib and DCC-3116, or future drug candidates, if successfully developed and approved, may cause undesirable
side effects that limit the commercial profile or result in other significant negative consequences for approved products; or delay or prevent further development or
regulatory approval with respect to drug candidates or new indications, or cause regulatory authorities to require labeling statements, such as boxed warnings.

• We face substantial competition, which may result in others discovering, developing, or commercializing products before or more successfully than we do.

•

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If the market opportunities for our approved drug or drug candidates are smaller than we estimate or if any approval that we obtain is based on a narrower definition of the
patient population, our revenue potential and ability to achieve profitability will be adversely affected.

The commercial success of QINLOCK, and of any future approved drugs, such as vimseltinib or DCC-3116, if approved, will depend upon the degree of market
acceptance by physicians, patients, third-party payors, and others in the medical community.

• Our failure to obtain additional marketing approvals in other foreign jurisdictions would prevent QINLOCK and our drug candidates from being marketed more

extensively internationally, and any approval we are granted for QINLOCK or our drug candidates in the United States (U.S.) or key European markets would not assure
approval of QINLOCK or our drug candidates in other foreign jurisdictions.

• QINLOCK and any drug candidate for which we obtain marketing approval will be subject to ongoing enforcement of post-marketing requirements and we could be

subject to substantial penalties, including withdrawal of QINLOCK or any future approved product from the market, if we fail to comply with all regulatory requirements.
In addition, the terms of the marketing approval of QINLOCK, and any future approved products, and ongoing regulation of our products, may limit how we manufacture
and market our products and compliance with such requirements may involve substantial resources, which could materially impair our ability to generate revenue.

• We may incur additional costs or experience delays in completing, or ultimately be unable to complete, the development and commercialization of our drug and drug

candidates.

•

If we experience delays or difficulties in the enrollment of patients in clinical trials, including in our clinical trials of vimseltinib or DCC-3116, our receipt of necessary
marketing approvals could be delayed or prevented.

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•

If serious adverse events or unacceptable side effects are identified during the development of our drug or drug candidates, we may need to abandon or limit such
development.

• We may not be able to obtain or, if granted, retain orphan drug exclusivity for our drug or drug candidates.

•

The current pandemic of the novel coronavirus (COVID-19), including recurring surges and waves of infection, and the future outbreak of other highly infectious or
contagious diseases, could seriously harm our research, development, and commercialization efforts, increase our costs and expenses and have a material adverse effect on
our business, financial condition, and results of operations.

• We have incurred significant operating losses since our inception and have not generated sufficient revenue to result in a profit from product sales. We expect to incur

continued losses for the foreseeable future and may never achieve or maintain profitability.

• We have a limited operating history, have not successfully completed late-stage clinical trials for any drug candidate other than QINLOCK, and have not generated

sufficient revenue to result in a profit from product sales or profits from our operations. We may never achieve or sustain profitability.

•

If we are unable to raise capital when needed, or on attractive terms, we could be forced to delay, reduce, or eliminate our research or drug development programs or
commercialization efforts.

• We rely, and expect to continue to rely, on third parties to conduct our clinical trials and preclinical studies, and those third parties may not perform satisfactorily, or may
experience delays in performing these services, including failing to meet deadlines for the completion of such trials or studies, which may harm our ability to obtain
regulatory approval for or commercialize our approved drug and drug candidates and our business could be substantially harmed.

• Our reliance on third parties for the manufacture of our drug candidates for preclinical testing and clinical trials, and for the manufacture of QINLOCK for

commercialization and clinical trials, increases the risk that we will not have sufficient quantities of our drug or drug candidates or such quantities at an acceptable cost or
quality, which could delay, prevent, or impair our development or commercialization efforts.

• We may not be able to enforce our intellectual property rights throughout the world.

•

If we are unable to obtain and maintain sufficient patent protection for our approved drug or drug candidates, or if the scope of the patent protection is not sufficiently
broad, third parties, including our competitors, could develop and commercialize products similar or identical to ours, and our ability to commercialize our approved drug
or drug candidates successfully may be adversely affected.

The summary risk factors described above should be read together with the text of the full risk factors below in the section entitled "Risk Factors" and the other information set
forth in this Annual Report on Form 10-K (Form 10-K), including our consolidated financial statements and the related notes, as well as in other documents that we file with the U.S.
Securities and Exchange Commission (SEC). The risks summarized above or described in full below are not the only risks that we face. Additional risks and uncertainties not
precisely known to us or that we currently deem to be immaterial may also materially adversely affect our business, financial condition, results of operations, and future growth
prospects.

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FORWARD-LOOKING STATEMENTS

This Form 10-K contains forward-looking statements, which reflect our current views with respect to, among other things, our operations and financial performance. All
statements other than statements of historical facts contained in this Form 10-K, including statements regarding our strategy, future operations, future financial position, future
revenue, projected costs, prospects, plan, objectives of management, and expected market growth are forward-looking statements. You can identify these forward-looking statements
by the use of words such as "outlook," "believes," "expects," "potential," "continues," "may," "will," "should," "seeks," "approximately," "predicts," "intends," "plans," "estimates,"
"anticipates," or the negative version of these words or other comparable words. Such forward-looking statements are subject to various risks and uncertainties. Accordingly, there
are or will be important factors that could cause actual outcomes or results to differ materially from those indicated in these statements. We believe these factors include but are not
limited to those described under "Risk Factors" and include, among other things:

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our ability to successfully commercialize or otherwise provide access to QINLOCK for the treatment of adult patients with advanced GIST who have received prior
treatment with three or more kinase inhibitors, including imatinib, in the U.S., key European markets, and any other jurisdictions where we may receive marketing
approval in the future;

the success and cost of our plans to research, develop, and commercialize our drug candidates, including the timing of our product development activities and clinical
trials, including the timing of our investigational new drug (IND) applications, and clearance thereof, for any other product candidates;

our ability to successfully complete the Phase 3 MOTION study for vimseltinib in tenosynovial giant cell tumor (TGCT) patients, advance our DCC-3116 program
through clinical development, and nominate additional drug candidates from our switch control inhibitor platform;

our ability to obtain and maintain regulatory approval for QINLOCK or obtain and maintain regulatory approval for any of our current or future drug candidates, and any
related restrictions, limitations, and/or warnings in the label of QINLOCK or any of our current or future drug candidates that may receive marketing approval;

the rate and degree of market acceptance for QINLOCK or any current or future drug candidate for which we may receive marketing approval;

our ability and plans in continuing to maintain our commercial infrastructure and successfully marketing and selling QINLOCK and any current or future drug candidate
for which we may receive marketing approval, including our plans with respect to the focus and activities of our sales force, the nature of our marketing, market access,
patient support activities, and our pricing of QINLOCK;

the pricing and reimbursement of, and the extent to which patient assistance programs are utilized for, QINLOCK, or any current or future drug candidates for which we
may receive marketing approval;

our expectations regarding the size and growth potential of the markets for QINLOCK or any of our current or future drug candidates for which we may receive marketing
approval and our ability to serve those markets;

our ability to obtain funding for our operations;

our ability to manufacture or obtain sufficient quantities of QINLOCK or our drug candidates, on a timely basis, to support our planned clinical trials and
commercialization of QINLOCK or any of our current or future drug candidates for which we may receive marketing approval;

the therapeutic benefit and effectiveness of QINLOCK and our drug candidates;

the safety profile and related adverse events of QINLOCK and our drug candidates;

our commercial preparedness efforts and our ability to commercially launch our drug or drug candidates, if and when they are approved, including, without limitation,
QINLOCK in Germany and France, and our ability to provide access in additional European countries through other channels;

the performance and experience of our licensee, Zai Lab (Shanghai) Co., Ltd. (Zai), to successfully develop and commercialize QINLOCK in the People's Republic of
China (the PRC), Hong Kong, Taiwan and, if approved, in Macau, these territories collectively referred to as Greater China, under the terms and conditions of our license
agreement, and the performance of our distributors in other territories;

our ability to attract additional licensees and/or collaborators or distributors with development, regulatory, and commercialization expertise;

our expectations regarding our ability to obtain, maintain, enforce, and defend our intellectual property protection for QINLOCK or our drug candidates;

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•

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future agreements with third parties in connection with the commercialization of QINLOCK or any of our current or future drug candidates for which we may receive
marketing approval;

regulatory and legal developments in the U.S. and foreign countries;

our ability to comply with healthcare laws and regulations in the U.S., key European markets, and any other foreign countries, including, without limitation, those
applying to the marketing and sale of commercial drugs;

the performance and experience of our third-party suppliers and manufacturers;

the success and timing of competing therapies that are or may become available;

our ability to attract and retain key scientific, medical, commercial, and management personnel;

the accuracy of our estimates regarding expenses, future revenues, capital requirements, and needs for additional financing;

the success of the implementation of our corporate restructuring intended to prioritize clinical development of select programs, streamline commercial operations,
maintain a focus on discovery research, and extend our cash runway;

the impact of global economic and political developments on our business, including economic slowdowns or recessions that may result from the continuing COVID-19
pandemic, which could harm our commercialization efforts for QINLOCK as well as the value of our common stock and our ability to access capital markets;

natural and manmade disasters, including pandemics such as COVID-19, and other force majeures, which could impact our operations, and those of our partners and other
participants in the health care industry, and which could adversely impact our clinical studies, preclinical research activities, and drug supply; and

our use of the proceeds from our follow-on public offerings and any other financing transaction we may undertake.

These factors should not be construed as exhaustive and should be read in conjunction with the other cautionary statements that are included elsewhere in this Form 10-K and
our prior filings with the SEC. You should read this Form 10-K and the documents that we have filed as exhibits to this 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 Form 10-K are made as of the date of this Form 10-K, and
we undertake no obligation to publicly update or review any forward-looking statement, whether as a result of new information, future developments or otherwise.

NOTE REGARDING TRADEMARKS

The Deciphera® word mark and logo and the QINLOCK® word mark and logo are registered trademarks of Deciphera Pharmaceuticals, LLC.

We have, in certain cases, omitted the ®, ©, and ™ designations for these and other trademarks used in this Form 10-K. Nevertheless, all rights to such trademarks are

reserved. These and other trademarks referenced in this Form 10-K are the property of their respective owners.

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Except where the context otherwise requires or where otherwise indicated, the terms "Deciphera," "we," "us," "our," "our company," "the company," and "our business" refer

to Deciphera Pharmaceuticals, Inc. and its consolidated subsidiaries.

PART I

ITEM 1.    BUSINESS

Overview

We are a biopharmaceutical company focused on discovering, developing, and commercializing important new medicines to improve the lives of people with cancer.

Leveraging our proprietary switch-control kinase inhibitor platform and deep expertise in kinase biology, we design kinase inhibitors to target the switch pocket region of the kinase
with the goal of developing potentially transformative medicines. Through our patient-inspired approach, we seek to develop a broad portfolio of innovative medicines to improve
treatment outcomes. QINLOCK, our switch-control kinase inhibitor, was engineered using our proprietary drug discovery platform and developed for the treatment of fourth-line
GIST. QINLOCK is approved in Australia, Canada, China, the European Union (EU), Hong Kong, Switzerland, Taiwan, the United States (U.S.), and the United Kingdom (U.K.) for
the treatment of fourth-line GIST. We wholly own QINLOCK and all of our drug candidates with the exception of a development and commercialization out-license agreement for
QINLOCK in Greater China. In addition to QINLOCK, we have identified and advanced multiple product candidates from our platform into clinical studies, including vimseltinib
and DCC-3116.

We are focused on the commercialization of QINLOCK for the treatment of fourth-line GIST in the U.S., where we believe that QINLOCK has been established as the
standard of care. Following QINLOCK’s European Commission (EC) approval in fourth-line GIST in November 2021, we have decided to focus our direct commercial efforts on
Germany and France. We have launched QINLOCK in Germany and plan to transition to a post-approval paid access program in France in the first half of 2022, subject to program
approval by the French National Authority for Health (HAS). We plan to provide access to QINLOCK to fourth-line GIST patients in additional European countries through other
channels.

We have two additional clinical-stage assets, vimseltinib and DCC-3116. In January 2022, we announced that enrollment was underway in our Phase 3 MOTION study for

vimseltinib, a CSF1R inhibitor, in patients with TGCT. Our Phase 1/2 study of vimseltinib in TGCT patients is ongoing and we expect to provide updated data in the second half of
2022. We are also advancing DCC-3116, our potential first-in-class drug candidate targeting the ULK kinase to inhibit autophagy. DCC-3116 is in the dose escalation phase of a
Phase 1 study in patients with mutant RAS and RAF cancers, and we expect to provide initial Phase 1 dose escalation data, as well as additional preclinical data on DCC-3116, in
2022. Following and subject to the selection of a recommended Phase 2 dose of DCC-3116 from the monotherapy dose escalation portion of the Phase 1 study of DCC-3116, we plan
to initiate the Phase 1 combination dose escalation cohorts with trametinib in 2022 and, subject to feedback from regulatory authorities, expand this study to add a combination with
a mutant KRAS G12C inhibitor in non-small cell lung cancer patients. In addition, we intend to continue to explore preclinical combinations of DCC-3116 with other agents. Finally,
we continue to invest in our next generation of research programs, which are designed to provide first-in-class or best-in-class treatments using our proprietary switch-control
inhibitor platform. Our goal for 2022 is to nominate a development candidate for our pan-RAF research program, which targets inhibition of BRAF and CRAF kinases.

QINLOCK - A Broad Spectrum KIT and PDGFRA Kinase Inhibitor for GIST

QINLOCK, an orally administered kinase switch control inhibitor of the KIT and PDGFRA kinases, is approved in nine territories for the treatment of fourth-line advanced

GIST.

On May 15, 2020, QINLOCK was approved by the U.S. Food and Drug Administration (FDA) for the treatment of adult patients with advanced GIST who have received prior

treatment with three or more kinase inhibitors, including imatinib. In May 2020, we launched QINLOCK commercially in the U.S. In 2020, QINLOCK was also approved for the
treatment of fourth-line GIST in Canada and Australia. In November 2020, we announced that we had entered into exclusive distribution agreements for QINLOCK in Canada,
Israel, Australia, New Zealand, Singapore, Malaysia, and Brunei. In November 2021, we announced that the EC approved QINLOCK in the EU for the treatment of adult patients
with GIST who have received prior treatment with three or more kinase inhibitors, including imatinib. The EC decision is applicable to all 27 EU member states plus Iceland,
Norway, and Liechtenstein. In 2021, QINLOCK was also approved for the treatment of fourth-line GIST in Switzerland and the U.K.

In June 2019, we entered into a License Agreement with Zai (the Zai License Agreement), pursuant to which we granted Zai exclusive rights to develop and commercialize

QINLOCK, including certain follow-on compounds (the Licensed Products), in Greater China. In March and September 2021, the China National Medical Products Administration
(NMPA) and the Taiwan Food and Drug Administration, respectively, approved QINLOCK for the treatment of adult patients with advanced GIST who

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have received prior treatment with three or more kinase inhibitors, including imatinib. In March 2021, the Hong Kong Department of Health approved QINLOCK in Hong Kong for
the treatment of adult patients with advanced GIST who have received prior treatment with imatinib, sunitinib, and regorafenib.

In November 2021, we announced top-line data from INTRIGUE, our Phase 3 study of QINLOCK for the treatment of second-line GIST. The INTRIGUE study did not meet

the primary endpoint of improved progression-free survival (PFS) compared with the standard of care sunitinib. The INTRIGUE Phase 3 clinical study is an interventional,
randomized, global, multicenter, open-label study to evaluate the efficacy and safety of QINLOCK compared to sunitinib in patients with GIST previously treated with imatinib. In
the study, 453 patients were randomized 1:1 to either QINLOCK 150 mg once daily or sunitinib 50 mg once daily for four weeks followed by two weeks without sunitinib.

We are focused on the commercialization of QINLOCK for the treatment of fourth-line GIST in the U.S., where we believe QINLOCK is the standard of care. Following
QINLOCK’s EC approval in fourth-line GIST in November 2021, we have decided to focus our direct commercial efforts on Germany and France. We have launched QINLOCK in
Germany and plan to transition to a post-approval paid access program in France in the first half of 2022, subject to program approval by the HAS. We plan to provide access to
QINLOCK to fourth-line GIST patients in additional European countries through other channels. Further clinical development of QINLOCK has been discontinued.

Vimseltinib – CSF1R Kinase Inhibitor for TGCT

Vimseltinib is an investigational, orally administered, potent, and highly-selective switch-control kinase inhibitor of the colony stimulating factor 1 receptor (CSF1R). We are
currently studying vimseltinib in a pivotal Phase 3 study in patients with TGCT (MOTION study). The MOTION study is a two-part, randomized, double-blind, placebo-controlled
study to assess the efficacy and safety of vimseltinib in patients with TGCT who are not amenable to surgery. In Part 1 of the study, eligible study participants will be assigned to
receive either vimseltinib or matching placebo for 24 weeks. Participants assigned to placebo in Part 1 will have the option to receive vimseltinib for Part 2 of the study. Part 2 is a
long-term treatment phase in which all participants will receive open-label vimseltinib. The primary endpoint of the study is objective response rate (ORR) at 25 weeks as measured
by Response Evaluation Criteria In Solid Tumors (RECIST) v1.1 by blinded independent central review. In January 2022, we announced that enrollment is currently underway in our
Phase 3 MOTION study.

We are also conducting an international, multicenter, ongoing open-label Phase 1/2 study designed to evaluate the safety, efficacy, pharmacokinetics (PK), and

pharmacodynamics (PD) of vimseltinib in patients with solid tumors and TGCT. In September 2021, at the European Society for Medical Oncology (ESMO) Congress 2021, we
announced data from patients with TGCT in both the Phase 1 dose escalation portion of the study and from cohort A in the Phase 2 expansion portion of the study.

Cohort A includes TGCT patients with no prior anti-CSF1/CSF1R (previous therapy with imatinib or nilotinib is eligible) and cohort B includes patients with prior anti-
CSF1/CSF1R (previous therapy with imatinib or nilotinib alone is not eligible). As GIST and TGCT have significant overlap in the key opinion leaders and treating physicians, we
believe our QINLOCK commercial infrastructure provides a strong foundation for a potential vimseltinib product, if approved. In 2022, we plan to focus on enrollment of our Phase
3 MOTION study and provide updated data from our Phase 1/2 study of vimseltinib in TGCT patients.

DCC-3116 – ULK Kinase Inhibitor for RTK/RAS/MAPK Driven Cancers

DCC-3116 is a potential first-in-class investigational, orally administered, potent, and highly selective switch-control inhibitor of the ULK kinase. DCC-3116 is designed to

inhibit autophagy, a key tumor survival mechanism in cancer cells, by inhibiting the ULK 1/2 kinases, referred to collectively as ULK or ULK kinases, which have been shown to be
the initiating factors that activate autophagy. We believe that DCC-3116, in combination with receptor tyrosine kinase (RTK)/RAS/MAP kinase signaling pathway inhibition, has the
potential to change the treatment of RTK/RAS/MAPK driven cancers, if approved.

DCC-3116 is being studied in a Phase 1 study designed to evaluate the safety, tolerability, clinical activity, PK, and PD of DCC-3116 as a single agent and in combination with
trametinib, an FDA approved MEK inhibitor, in patients with advanced or metastatic tumors with a RAS or RAF mutation. The clinical development plan for DCC-3116 will initially
focus on documented RAS and RAF cancer mutations, which we believe utilize autophagy for tumor growth, survival, and as a resistance mechanism to inhibitors of RTK, RAS, and
MAP kinases.

Following the dose escalation phase and subject to the selection of a recommended Phase 2 dose, expansion cohorts in combination with trametinib are currently planned in

patients with advanced or metastatic pancreatic ductal adenocarcinoma with KRAS or BRAF mutations, non-small cell lung cancer with KRAS, NRAS, or BRAF mutations,
colorectal cancer with KRAS, NRAS, or BRAF mutations, and melanoma with NRAS or BRAF mutations. In June 2021, we announced dosing of the first

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patient in the Phase 1, multicenter, open-label, first-in-human study of DCC-3116. In 2022, we plan to continue to enroll patients and expect to provide initial Phase 1 dose escalation
data as well as additional preclinical data on DCC-3116. Following and subject to the selection of a recommended Phase 2 dose of DCC-3116 from the monotherapy dose escalation
portion of the Phase 1 study of DCC-3116, we plan to initiate the Phase 1 combination dose escalation cohorts with trametinib in 2022 and, subject to feedback from regulatory
authorities, expand this study to add a combination with a mutant KRAS G12C inhibitor in non-small cell lung cancer patients.

Discovery Platform – Switch-Control Kinase Inhibition

We believe our proprietary switch-control kinase inhibitor platform, supported by our experienced management team, enables us to develop advanced, differentiated kinase

inhibitors that may provide significant benefits to patients with cancer. We continue to work on potential new drug candidates for undisclosed targets.

Kinase inhibitors are an important class of cancer therapies. Despite the success of this drug class, there remains a significant opportunity for advanced kinase inhibitors that
address the shortcomings of current therapies, including limited durability of response caused by development of resistance mutations and off-target toxicities that limit dose and,
consequently, target inhibition. In addition, currently approved kinase inhibitors target fewer than 10% of the over 500 known human kinases. There remains a substantial
opportunity to develop novel inhibitors that target therapeutically relevant kinases.

Our proprietary switch-control kinase inhibitor platform combines our deep expertise in kinase biology with our library of drug-like compounds that we designed to interact

with specific regions of the kinase regulating switch function. The transformation of a kinase from a switched-off, or inactivated, state to a switched-on, or activated, state is
dependent upon the interaction of one region of the kinase called the activation switch with another region called the switch pocket. The interaction between the activation switch and
the switch pocket is a common mechanism among all kinases; however, the molecular structure of the activation switch and the switch pocket varies among kinases allowing for the
rational design of molecules that inhibit a specific kinase or specific kinases. An extension of our platform has been shown to enable the design of switch-control inhibitors for
serine/threonine kinases that utilize other kinase domain regions for switch regulation/activation, including the C-helix, P-loop, and catalytic amino acid residues.

Our drug candidates directly target the conformation-controlling switches that kinases rely on for activation and are designed to inhibit the kinase from switching on. By using
our proprietary approach to target the switch pocket, we believe we can design inhibitors that are more broadly active against the target kinase or that are spectrum-selective against
several chosen on-target kinases, all while minimizing off-target toxicity. We believe that our drug candidates may contribute to higher activity than currently available kinase
inhibitors even upon accumulation of mutations that would render the kinase resistant to other kinase inhibitors.

In addition to QINLOCK, our platform also enabled the discovery and development of vimseltinib, our Phase 3 inhibitor of CSF1R kinase for the potential treatment of TGCT,

and DCC-3116, our Phase 1 inhibitor of ULK1 and ULK2 kinases being developed to inhibit autophagy, which is a key process used by cancers for survival and resistance to a
variety of anti-tumor therapeutics.

We are also making a focused investment in our next generation of research programs, which are designed to provide first-in-class or best-in-class treatments using our
proprietary switch-control inhibitor platform. Our goal for 2022 is to nominate a development candidate for our pan-RAF research program, which targets inhibition of BRAF and
CRAF kinases. We also plan to continue to develop our in-licensed research-stage program, which targets the VPS34 kinase.

We have assembled a management team with extensive experience in the discovery, development, and commercialization of cancer therapeutics, including in senior roles at

leading pharmaceutical companies. We are supported by our board of directors and specialized scientific advisory boards, who contribute their deep understanding of drug discovery
and development, as well as expertise in building public companies and business development. We believe that our team is ideally positioned to leverage our highly differentiated
platform to develop and, if approved, commercialize advanced kinase inhibitors that will have significant benefit for patients with cancer.

Our Strategy

Our objective is to discover, develop and commercialize important new medicines to improve the lives of people with cancer. The principal components of our strategy

include:

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•

Successfully commercialize QINLOCK in fourth-line GIST in the U.S., where we believe we are the standard of care, and the key European markets of Germany and
France, while working to provide access to QINLOCK to eligible patients around the world through other channels.

• Develop vimseltinib, our inhibitor of CSF1R, as a potential single agent therapy for the treatment of TGCT, for which we recently initiated the Phase 3 MOTION study,

and leverage potential synergies and experience we have gained from QINLOCK towards this second drug candidate.

• Develop DCC-3116, our inhibitor of ULK kinase, for the potential treatment of mutant RTK, RAS, or RAF cancers, including potentially expanding this program to

include a mutant KRAS G12C combination agent in non-small cell lung cancer.

• Advance our discovery efforts using our switch-control kinase inhibitor platform towards nominating a development candidate for our pan-RAF research program.

•

•

Evaluate strategic opportunities to accelerate development timelines and maximize the commercial potential of our drug candidates.

Foster a values-based culture that embraces diversity and advances our patient-focused mission.

Kinases and their Role in Cellular Function

Kinases play an important role in regulating cellular functions and the communication of cells with their environments. When dysregulated, kinases contribute to the

development and progression of diseases including cancer and inflammatory and autoimmune diseases. Despite the success of kinase inhibitors as a drug class, the therapeutic
potential of individual kinase inhibitors has been limited by the development of drug resistance and by poor potency and selectivity profiles that lead to off-target toxicities or
diminished efficacy. In addition, currently approved kinase inhibitors target fewer than 10% of the over 500 known human kinases. We believe there is a substantial opportunity to
develop novel kinase inhibitor therapies.

Within almost all kinases, a molecular control known as the activation switch governs whether the kinase is in the inactive or the active state. Most of the time kinases are in an

inactive state and are triggered into the active state when they are needed to direct normal cellular functions. In cancer, mutations within kinases, particularly those that involve the
activation switch region, can cause uncontrolled kinase signaling within the cell. In addition, kinases may acquire further mutations during treatment with traditional kinase inhibitors
that confer resistance to these kinase inhibitors. We designate specific regions of the gene that encodes the kinase, or exons, when referring to particular mutations. Kinase activity
also may be amplified through the aberrant development of multiple copies of the relevant gene. These aggressively activated mutated or amplified kinases can drive rapid,
uncontrolled growth and spread of tumors. Additionally, wild-type kinases (not mutationally activated) in cancer cells or in various cell types in the tumor microenvironment can be
co-opted by tumors or malignancies to enable growth, survival, or metastases.

Our Approach: Switch-Control Kinase Inhibitors

We created our diverse pipeline of clinical-stage drug candidates entirely in house using our proprietary switch-control kinase inhibitor platform. We developed our platform

based on our deep insight into the biology of kinases, which are regulated by control of their shape, or conformation. The transformation of a kinase from an inactive to an activated
state is dependent upon the interaction of one region of the kinase called the activation switch with another region called the switch pocket. This activation switch mechanism is
common among kinases. Some kinases also can be activated if the activity of an inhibitory switch that ordinarily blocks the ability of the activation switch to interact with the switch
pocket is diminished or lost. Our drug candidates, which we refer to as switch-control kinase inhibitors, directly interfere with the interaction between the activation switch and the
switch pocket and prevent kinase activation. While the interaction between the activation switch and the switch pocket is common among kinases, the molecular structure of the
activation switch and the switch pocket varies among kinases. We take advantage of this variation to design molecules that inhibit a specific kinase or kinases. An extension of our
platform has been shown to enable the design of switch-control inhibitors for serine/threonine kinases that utilize kinase regions other than the activation loop for switch
regulation/activation, including the C-helix, P-loop, or catalytic amino acid residues. This expanded platform enables the design of switch-control inhibitors that bind a kinase in
either a Type II state (DFG-out) or a Type I state (DFG-in).

Our proprietary switch-control kinase inhibitor platform includes a library of drug-like, switch-control kinase compounds. We have determined and assessed more than 200 co-

crystal structures where our compounds are bound into the switch pocket of specific kinases. We use this information to identify and optimize candidate molecules that are
specifically designed to interact with the switch pocket. By directly targeting the switch pocket, we believe we can design inhibitors that will be broadly active

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against the target kinase, covering both wild-type and many or all of the known mutant or amplified forms, or spectrum-selective towards several chosen kinases.

Using our switch-control kinase inhibitor platform, we have developed a diverse pipeline of differentiated, orally administered drug candidates that include our approved drug,

QINLOCK, and two clinical-stage agents, vimseltinib and DCC-3116, and ongoing research-stage programs. Our switch-control kinase inhibitors are designed to interact at a
molecular level that is distinct from other kinase inhibitors and are designed to generate higher and more durable rates of response. We believe our drug candidates may contribute to
higher activity than currently available kinase inhibitors.

The figure below illustrates activation of the switch pocket and how our switch-control kinase inhibitors are designed to embed into the switch pocket thereby inhibiting switch

activation.

Switched on: Kinase active

Switched off: Kinase inactive

While we believe that our proprietary switch-control kinase inhibitor platform offers the benefits described above, there are certain limitations of our platform, including its

inability to control inhibition of certain kinases that interfere with access to the switch pocket, including cyclin dependent kinases and specific kinases in the MAP kinase family
(MEK and ERK), which constitute less than 10% of the over 500 known human kinases as well as the inability of our laboratory assays to support high-throughput screening,
resulting in limitations on the number of molecules that can be screened.

Our Drug and Drug Candidates

We are leveraging our proprietary switch-control kinase inhibitor platform to develop a pipeline of highly selective, potent small molecule drug candidates that are designed to
directly inhibit activation of kinases implicated in the growth and spread of tumors. Our platform allows us to rapidly identify new drug candidates to enter preclinical development.
We wholly own QINLOCK and all of our drug candidates with the exception of a development and commercialization out-license agreement for QINLOCK in Greater China,
including the lead programs summarized in the following figure. Our research -stage programs are also wholly-owned, with the exception of VPS34 program, which we have in-
licensed:

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Notes: CSF1R=colony-stimulating factor 1 receptor; GIST=gastrointestinal stromal tumor; KIT=KIT proto-oncogene receptor tyrosine kinase; PDGFRA=platelet-derived growth factor receptor α; RAF=rapidly accelerated fibrosarcoma; RAS=rat sarcoma
gene; TGCT=tenosynovial giant cell tumor; ULK=unc-51-like autophagy-activating kinase; (1) Exclusive development and commercialization license with Zai Lab in Greater China for QINLOCK; (2) QINLOCK is approved for 4  line GIST in the United
States, Australia, Canada, China, the European Union, Hong Kong, Switzerland, Taiwan, and the United Kingdom; (3) Agreement with Sprint Bioscience for exclusive in-license worldwide rights to a research-stage program targeting VPS34.

th

QINLOCK: A Broad Spectrum Kinase Inhibitor of KIT and PDGFRA for GIST

QINLOCK is an orally administered switch-control kinase inhibitor developed for the treatment of GIST and is approved in nine territories for the treatment of fourth-line
advanced GIST. While approved kinase inhibitors control certain initiating and drug resistance-causing mutations in KIT and PDGFRA, the kinases that drive disease progression in
most GIST patients, these approved drugs fail to inhibit all known mutations. We designed QINLOCK to improve the treatment of GIST patients by inhibiting the full spectrum of
the known mutations in KIT and PDGFRA. QINLOCK is a KIT and PDGFRA switch-control kinase inhibitor that blocks initiating and resistance KIT mutations in exons 9, 11, 13,
14, 17, and 18 known to be present in GIST patients. QINLOCK similarly inhibits the primary initiating PDGFRA mutations occurring in exons 12 and 18 and also inhibits wild-type
PDGFRA that is subject to amplification in cancers.

Following the Phase 3 INVICTUS study of QINLOCK in fourth-line GIST which met its primary endpoint of improved PFS versus placebo, on May 15, 2020, QINLOCK was

approved by the FDA for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib. Following
FDA approval of QINLOCK, in May 2020, we commenced sales and marketing of QINLOCK in the U.S.

In 2020, QINLOCK was also approved for the treatment of fourth-line GIST in Canada and Australia. In November 2020, we announced that we had entered into exclusive

distribution agreements for QINLOCK in Canada, Israel, Australia, New Zealand, Singapore, Malaysia, and Brunei. In November 2021, we announced that the European
Commission (EC) approved QINLOCK in the EU for the treatment of adult patients with GIST who have received prior treatment with three or more kinase inhibitors, including
imatinib. The EC decision is applicable to all 27 EU member states plus Iceland, Norway, and Liechtenstein. In 2021, QINLOCK was also approved for the treatment of fourth-line
GIST in Switzerland and the U.K.

In June 2019, we entered into the Zai License Agreement with Zai pursuant to which we granted Zai exclusive rights to develop and commercialize the Licensed Products in

Greater China. In March and September 2021, the China NMPA and the Taiwan Food and Drug Administration, respectively, approved QINLOCK for the treatment of adult patients
with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib. In March 2021, the Hong Kong Department of Health approved
QINLOCK in Hong Kong for the treatment of adult patients with advanced GIST who have received prior treatment with imatinib, sunitinib, and regorafenib.

In November 2021, we announced top-line data from INTRIGUE, our Phase 3 study of QINLOCK for the treatment of second-line GIST. The INTRIGUE study did not meet

the primary endpoint of improved PFS compared with the standard of care sunitinib. The INTRIGUE Phase 3 clinical study is an interventional, randomized, global, multicenter,
open-label study to evaluate the efficacy and safety of QINLOCK compared to sunitinib in patients with GIST previously treated with imatinib. In January 2022, we presented the
results from the INTRIGUE Phase 3 study of QINLOCK in patients with GIST previously treated with imatinib at the American Society of Clinical Oncology Plenary Series
Session.

We are focused on the commercialization of QINLOCK for the treatment of fourth-line GIST in the U.S., where we believe QINLOCK is the standard of care. Following

QINLOCK’s EC approval in fourth-line GIST in November 2021, we plan to focus

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our direct commercial efforts on Germany and France. We have launched QINLOCK in Germany and plan to transition to a post-approval paid access program in France in the first
half of 2022, subject to program approval by the HAS. We plan to provide access to QINLOCK to fourth-line GIST patients in additional European countries through other channels.
Further clinical development of QINLOCK has been discontinued.

Market Opportunity in GIST

GIST is the most common sarcoma of the gastrointestinal tract and is commonly localized to the stomach and small intestine. GIST can occur at any age, but is more common
in individuals aged over 50 years. According to the American Cancer Society, in 2020 approximately 4,000 to 6,000 patients were newly diagnosed with GIST in the U.S. Estimates
for 5-year survival range from 52% to 94% depending upon the stage of the disease at diagnosis.

GIST is a disease driven initially by primary mutations in KIT kinase in approximately 80% of cases or in PDGFRA kinase in approximately 5% to 10% of cases. In
approximately 10% to 15% of all GIST patients, the disease is not driven by KIT or PDGFRA but by other genetic mutations or alterations. Primary mutations in the KIT gene are
found in exon 11 in approximately 67% of GIST patients, in exon 9 in approximately 10% of GIST patients, and less frequently in exon 13 or 17. Primary mutations in the PDGFRA
gene are found in exon 18 (a mutation referred to as D842V being the most frequent) in approximately 6% of GIST patients and more rarely in exon 12.

Metastatic KIT-driven GIST is a disease characterized by many mutations in KIT, with over 90% of individual KIT-driven GIST patients harboring multiple mutations that

drive progression of their disease. Multiple secondary mutations can arise within an individual patient and/or tumor in different areas or sites of tumor growth. Drug resistant
secondary mutations in patients with KIT-driven GIST span exon regions 13 to 18.

Existing First-, Second-, and Third-Line Treatments For GIST

Patients diagnosed early with localized GIST generally undergo surgical resection of their tumors. In surgically resected patients considered at a high risk of recurrence and in

unresectable or metastatic patients, the kinase inhibitor imatinib is the only approved first-line therapy in the U.S., other than avapritinib, which is approved in the U.S. for GIST
patients with PDGFRA exon 18 mutations only (estimated to be approximately 6% of all patients with newly-diagnosed GIST). RECIST criteria, which characterizes changes in
tumor size measured by CT scan, define a partial response (PR) as tumor size reduction of 30% or more, a complete response (CR) as tumor size reduced by 100%, and disease
progression as an increase in tumor size by 20% or more. RECIST criteria define stable disease (SD) as neither qualifying for PR nor for disease progression.

Disease progression in advanced GIST is often due to secondary mutations in KIT or PDGFRA that cause resistance to first-line treatment. In GIST patients who progress on

imatinib, second-line therapy is typically sunitinib, which was approved in 2006 for patients with GIST who had disease progression following treatment with, or intolerance to,
imatinib.

In 2013, regorafenib received marketing approval in the U.S. for the treatment of adults with metastatic and unresectable GIST who have experienced disease progression on,

or intolerance to, imatinib and sunitinib.

Although GIST patients may experience periods of disease control with approved treatments, due to the heterogeneous nature of the mutations that drive the disease, many
patients continue to progress and ultimately fail all lines of treatment. Of the approximately 4,000 to 6,000 GIST patients newly diagnosed each year in the U.S., we estimate that
about 65% will experience metastatic disease with a comparable incidence in what is referred to as the EU5, which includes Germany, France, Italy, Spain, and the U.K. We estimate
that the annual new treatment-eligible population of fourth-line GIST patients in the U.S. is approximately 1,000 to 1,300. This treatment eligible patient estimate excludes the
estimated proportion of patients that die, discontinue treatment, or enter a clinical trial and, therefore, are not eligible for treatment; for later lines of therapy, we expect a similar
drop-off rate. This estimate, which is based on our analyses of U.S. claims data, is inherently uncertain.

Clinical Development of QINLOCK

Phase 3 INVICTUS Study in Fourth-Line and Fourth-Line Plus GIST

On May 15, 2020, QINLOCK was approved by the FDA for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase

inhibitors, including imatinib. The FDA’s approval of QINLOCK was based on our New Drug Application (NDA) submission in December 2019, which was reviewed under the
FDA’s Oncology Center of Excellence (OCE) pilot program, Real-Time Oncology Review (RTOR) and the FDA’s Project Orbis initiative, and granted priority review. Our NDA
submission was based on positive results from our first Phase 3 study, INVICTUS, in patients with fourth-line and fourth-line plus GIST. Following the FDA approval of QINLOCK,
in May 2020, we commenced sales and

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marketing of QINLOCK in the U.S. In 2020, QINLOCK was also approved for the treatment of fourth-line GIST in Canada and Australia. In November 2020, we announced that we
had entered into exclusive distribution agreements for QINLOCK in Canada, Israel, Australia, New Zealand, Singapore, Malaysia, and Brunei. In November 2021, we announced
that the EC approved QINLOCK in the EU for the treatment of adult patients with GIST who have received prior treatment with three or more kinase inhibitors, including imatinib.
The EC decision is applicable to all 27 EU member states plus Iceland, Norway, and Liechtenstein. In 2021, QINLOCK was also approved for the treatment of fourth-line GIST in
Switzerland and the U.K.

We will maintain a limited direct commercial presence that will support the launch of QINLOCK in two key markets, Germany and France, and plan to provide access to

QINLOCK in additional European countries through other channels. In addition, named patient sales in Switzerland are underway.

The INVICTUS Phase 3 study was an international, multicenter, randomized, double-blind, placebo-controlled trial to evaluate the safety, tolerability, and efficacy of

QINLOCK compared to placebo in patients with advanced GIST whose previous therapies have included at least imatinib, sunitinib, and regorafenib. The primary efficacy endpoint
is PFS based on disease assessment by blinded independent central review (BICR) using modified RECIST 1.1 criteria. The key secondary endpoint is ORR based on BICR.
Additional secondary endpoints include overall survival (OS), time to progression, time to best response, PFS by investigator assessment, quality of life, and safety.

In the INVICTUS study, QINLOCK demonstrated a median PFS of 6.3 months (27.6 weeks) compared to 1.0 month (4.1 weeks) in the placebo arm and significantly reduced

the risk of disease progression or death by 85% (Hazard Ratio [HR] of 0.15, 95% Confidence Interval (0.09,0.25), p-value <0.0001) compared to placebo. This PFS benefit was
consistent across all assessed patient subgroups.

For the key secondary endpoint of ORR as determined by BICR using modified RECIST, QINLOCK demonstrated an ORR of 9.4% compared with 0% for placebo (p-
value=0.0504), which was not statistically significant. As of the cutoff date of May 31, 2019, the median duration of response had not been reached with seven of the eight patients
still responding to treatment. All responders had PRs.

QINLOCK also showed a clinically meaningful improvement over placebo in terms of the secondary endpoint of OS (median OS 15.1 months with QINLOCK compared to

6.6 months with placebo, HR = 0.36, 95% Confidence Interval (0.21,0.62), nominal p-value=0.0004). According to the pre-specified hierarchical testing procedure of the endpoints,
the hypothesis testing of OS cannot be formally conducted unless the test of ORR is statistically significant. Since statistical significance was not achieved for ORR, the hypothesis
testing of OS was not formally performed. The OS data for the placebo arm includes patients taking placebo who, following progression, were crossed-over to QINLOCK treatment.

QINLOCK was generally well tolerated and associated with an acceptable safety profile. The most common adverse reactions (≥20%) in patients treated with QINLOCK were

alopecia, fatigue, nausea, abdominal pain, constipation, myalgia, diarrhea, decreased appetite, PPES, and vomiting. Grade 3 or 4 treatment-emergent adverse events (TEAEs)
occurred in 42 patients (49%) on the QINLOCK arm compared to 19 patients (44%) on the placebo arm. Grade 3 or 4 TEAEs in greater than 5% of patients in the QINLOCK arm
were anemia (9%; n=8), abdominal pain (7%; n=6), and hypertension (7%; n=6). Grade 3 or 4 TEAEs in greater than 5% of patients in the placebo arm were anemia (14%; n=6). The
most common grade 3 or 4 laboratory abnormalities (≥4%) were increased lipase and decreased phosphate. Serious adverse events (SAEs) occurred in 31% of patients who received
QINLOCK. SAEs that occurred in >2% of patients were abdominal pain (4.7%), anemia (3.5%), nausea (2.4%), and vomiting (2.4%).

TEAEs leading to dose reduction occurred in 7% of patients on the QINLOCK arm compared to 2% on the placebo arm. TEAEs leading to dose interruption occurred in 24%

of patients on the QINLOCK arm compared to 21% on the placebo arm. TEAEs leading to study treatment discontinuation occurred in 8% of patients on the QINLOCK arm
compared to 12% of patients on the placebo arm. TEAEs leading to death occurred in 6% of patients on the QINLOCK arm compared to 23% on the placebo arm.

In June 2021, we presented data for QINLOCK patients undergoing intra-patient dose escalation after disease progression in the INVICTUS Phase 3 study at the American

Society of Clinical Oncology. An exploratory analysis was conducted to assess the safety and efficacy of QINLOCK dose escalation to 150 mg BID among patients randomized to
QINLOCK 150 mg QD in the INVICTUS study. As of the August 10, 2020 cutoff date, of the 85 patients randomized to QINLOCK 150 mg QD in the INVICTUS study, 43 dose
escalated to 150 mg BID after disease progression by blinded independent central review using modified RECIST version 1.1.

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Among the 43 patients in the QINLOCK arm who dose escalated, initial median PFS, or mPFS1, was 4.6 months (95% CI 2.7–6.4) and the subsequent median PFS, or mPFS2,

from the day of dose escalation to second disease progression or death was 3.7 months (95% CI 3.1–5.3). The ratio of mPFS2/mPFS1 was 80%. Median OS was 18.4 months in
patients randomized to QINLOCK 150 mg QD with progressive disease and who dose escalated to 150 mg BID (n=43) and 14.2 months in those randomized to QINLOCK 150 mg
QD with progressive disease and not dose escalating (n=22) (HR 0.74, 95% CI 0.37–1.49). QINLOCK 150 mg BID was well tolerated with a similar safety profile to QINLOCK 150
mg QD, with new or worsening Grade 3–4 TEAEs of anemia in 6 (14%) and abdominal pain in 3 (7%) patients. In addition, in January 2022, we announced that the National
Comprehensive Cancer Network (NCCN) Clinical Practice Guidelines for GIST now includes the use of QINLOCK 150 mg twice daily (BID) after disease progression if previously
treated with QINLOCK 150 mg once daily in fourth-line GIST patients.

In September 2021, we announced a long-term update from the Phase 3 INVICTUS study. An exploratory evaluation of primary and secondary endpoints in the Phase 3
INVICTUS study, with a cutoff date of January 15, 2021, an additional 19 months after the primary analysis, demonstrated consistent PFS with no change since the primary data cut
off, and improved median OS among patients receiving ripretinib (median OS 18.2 months with QINLOCK compared to 6.3 months with placebo, HR = 0.41, 95% Confidence
Interval (0.26, 0.65)). Safety findings were consistent with the primary analysis results and most TEAEs were Grade 1 or 2. Increases in TEAEs and TEAEs leading to dose
modifications in the additional 19 months of follow up were minimal. We believe these more mature results continue to support the clinically meaningful benefit in PFS and OS for
QINLOCK with an acceptable safety profile in patients with advanced GIST treated with three or more prior lines of therapy.

Phase 3 INTRIGUE Study in Second-Line GIST

In December 2018, we initiated a pivotal Phase 3 study, INTRIGUE, to evaluate the efficacy and tolerability of QINLOCK compared to sunitinib in second-line GIST patients.

The study is being conducted at 122 investigational sites in 22 countries. We successfully completed enrollment of 453 patients in INTRIGUE.

The INTRIGUE Phase 3 study is an interventional, randomized, global, multicenter, open-label study to evaluate the safety, tolerability, and efficacy of QINLOCK compared
to sunitinib in patients with GIST previously treated with imatinib. Patients were randomized 1:1 to either 150 mg of QINLOCK once daily or 50 mg of sunitinib once daily for four
weeks followed by two weeks without sunitinib. The primary efficacy endpoint was PFS as determined by independent radiologic review using modified RECIST. Secondary
endpoints as determined by independent radiologic review using modified RECIST include ORR and OS. As an event-driven study, the analysis of the primary endpoint for
INTRIGUE occurred once a pre-specified number of events, defined as death or disease progression events based on independent radiologic review using modified RECIST, had
occurred.

In November 2021, we announced top-line data from our INTRIGUE study, which showed the INTRIGUE study did not meet the primary endpoint of improved PFS

compared with the standard of care sunitinib.

The statistical analysis plan included a hierarchical testing structure that included testing patients with a KIT exon 11 primary mutation and in the all patient intent-to-treat

(AP) population. In patients with a KIT exon 11 primary mutation, (n=327), QINLOCK demonstrated a mPFS of 8.3 months compared to 7.0 months for the sunitinib arm (HR of
0.88, p=0.360). Although not formally tested due to the rules of the hierarchical testing sequence, in the AP population QINLOCK demonstrated a mPFS of 8.0 months compared to
8.3 months for the sunitinib arm (HR of 1.05, nominal p=0.715).

In the INTRIGUE study, QINLOCK was generally well tolerated and the safety profile of QINLOCK was consistent with its existing prescribing information, with the safety

population as follows: ripretinib (n=223) and sunitinib (n=221). Any grade 3/4 TEAEs were as follows (n (%)): ripretinib 92 (41.3) and sunitinib 145 (65.6). Any grade 3/4 drug-
related TEAEs were as follows (n (%)): ripretinib 59 (26.5) and sunitinib 122 (55.2).

QINLOCK Mechanism of Action

KIT and PDGFRA are kinases that each contain both an auxiliary inhibitory switch encoded by KIT exon 11 or PDGFRA exon 12 and a main activation switch within the

kinase domain encoded by KIT exons 17 and 18 or PDGFRA exons 18 and 19. These mechanisms carefully regulate cellular kinase activity by controlling kinase conformation in
either an “on” or “off" position. Oncogenic kinase mutations predominantly function by disrupting one or more regulatory switch mechanisms, leading to dysregulated function and
loss of normal, physiologic conformational control. QINLOCK is a novel switch-control TKI specifically designed to broadly inhibit KIT and PDGFRA kinase signaling through a
dual mechanism of action that secures the kinase into an inactive conformation, resulting in inhibition of downstream signaling and cell proliferation.

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QINLOCK precisely and durably binds to both the switch pocket region and the activation switch to lock the kinase in the inactive state, preventing downstream signaling and
cell proliferation. For one aspect of its dual mechanism of action, portions of QINLOCK mimic the inhibitory switch and occupy the switch pocket, thereby preventing the activation
switch’s entry. Additionally, other residues on QINLOCK bind to the activation loop, stabilizing it out of the switch pocket and covering the adenosine triphosphate (ATP) binding
site, so phosphorylation cannot occur. This dual mechanism of action secures KIT and PDGFRA kinases in their inactive conformations providing broad inhibition of KIT and
PDGFRA kinase activity, including wild type and multiple primary and secondary mutations. QINLOCK also inhibits other kinases in vitro, such as PDGFRB, TIE2, VEGFR2, and
BRAF.

Vimseltinib: CSF1R Kinase Inhibitor for TGCT

Vimseltinib is an investigational, orally administered, potent, and highly-selective switch-control kinase inhibitor of CSF1R. Vimseltinib was designed to selectively bind to

the CSF1R switch pocket. It has greater than 100-fold selectivity for CSF1R over the closely related kinases FLT3, KIT, PDGFRA, PDGFRB, and VEGFR2 and has an even greater
selectivity for CSF1R over approximately 300 other human kinases that we tested. Vimseltinib inhibits CSF1R signaling in cellular assays, as well as blocks macrophage-mediated
tumor cell migration, osteoclast differentiation, and proliferation of a CSF1R-dependent cell line.

We are currently studying vimseltinib in a pivotal Phase 3 study in patients with TGCT. The MOTION study is a two-part, randomized, double-blind, placebo-controlled study

of vimseltinib to assess the efficacy and safety in patients with TGCT who are not amenable to surgery. In Part 1 of the study, eligible study participants will be assigned to receive
either vimseltinib or matching placebo for 24 weeks. Participants assigned to placebo in Part 1 will have the option to receive vimseltinib for Part 2 of the study. Part 2 is a long-term
treatment phase in which all participants will receive open-label vimseltinib. The primary endpoint of the study is ORR at 25 weeks as measured by RECIST v1.1 by blinded
independent central review. In January 2022, we announced that enrollment is currently underway in our Phase 3 MOTION study.

We are also conducting an international, multicenter, ongoing open-label Phase 1/2 study designed to evaluate the safety, efficacy, PK, and PD of vimseltinib in patients with
solid tumors and TGCT. In September 2021, we announced data from patients with TGCT in both the Phase 1 dose escalation portion of the study and from cohort A in the Phase 2
expansion portion of the study. Cohort A includes TGCT patients with no prior anti-CSF1/CSF1R (previous therapy with imatinib or nilotinib is eligible) and cohort B includes
patients with prior anti-CSF1/CSF1R (previous therapy with imatinib or nilotinib alone is not eligible).

In November 2021, we also announced that vimseltinib had been granted fast track designation by the FDA for the treatment of patients with TGCT who are not amenable to

surgery.

We are prioritizing the clinical development of vimseltinib in patients with TGCT through our Phase 3 MOTION study and we plan to continue to enroll patients during 2022.

As GIST and TGCT have significant overlap in the key opinion leaders and treating physicians, we believe our QINLOCK commercial infrastructure provides a strong foundation
for a potential vimseltinib product, if approved. In the second half of 2022, we plan to provide updated data from our Phase 1/2 study of vimseltinib in TGCT patients.

Market Opportunity in TGCT

TGCTs are a group of benign tumors that involve the synovium, bursae, and/or tendon sheath. Although benign, these tumors can grow and cause damage to surrounding

tissues and structures inducing pain, swelling, and limitation of movement of the joint. A genetic translocation in certain cells within the tumor causes overproduction of CSF1, the
ligand for the CSF1R receptor, triggering migration of inflammatory cells including CSF1R-expressing tumor-associated macrophages to tumor sites. Surgery is the main treatment
option; however, these tumors tend to recur in approximately 45% of patients with diffuse-type TGCT and 10% of patients with localized TGCT. If untreated or if the tumor
continually recurs, damage and degeneration may occur in the affected joint and surrounding tissues, which may cause significant disability. TGCT typically occurs in people 30-50
years old and patient burden most commonly includes pain, joint stiffness, restricted mobility, joint damage, and negative impact on quality of life.

TGCTs are divided into types based on where they are and how they grow. Localized TGCTs are typically more well-defined and confined to a portion of joints like the
fingers, toes, knees, wrists, and ankles. Diffuse-type TGCTs are typically less well-defined and occur most commonly in and around joints such as the knee, hips, ankles, elbows, and
shoulders. We estimate that approximately 14,000 to 18,000 patients are diagnosed annually with localized and diffuse-type TGCT in the U.S. In addition, we estimate that annual
incidence of new drug-treated TGCT cases in the U.S. is approximately 1,300 to 1,400, with a

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comparable incidence in the EU5. We estimate that the annual prevalent drug-eligible TGCT patients in the U.S. is approximately 8,000.

CSF1R inhibition has demonstrated promising clinical benefit in TGCT patients and we believe that despite an approved treatment for TGCT patients in the U.S., there

remains an unmet medical need for this population. Pexidartinib is the only approved product for TGCT patients with TGCT associated with severe morbidity or functional
limitations and not amenable to improvement with surgery. In a randomized Phase 3 trial, the proportion of patients who achieved ORR was higher for pexidartinib, at 38%, versus
placebo, at 0%, at week 25 by RECIST, version 1.1. The FDA approval includes a Risk Evaluation and Mitigation Strategy (REMS) for pexidartinib, including intensive liver
monitoring due to hepatotoxicity risks, thought to be an off-target effect. The European Medicines Agency (EMA) adopted the decision of refusal of the pexidartinib EU MAA in
November 2020. Many patients are treated with off-label tyrosine kinase inhibitors, in particular imatinib, despite the lack of an approval in TGCT.

Phase 3 MOTION Study in Patients with TGCT

We are currently studying vimseltinib in a pivotal Phase 3 MOTION study in patients with TGCT. In January 2022, we announced that enrollment is currently underway in our

Phase 3 MOTION study. The MOTION study is a two-part, randomized, double-blind, placebo-controlled study to assess the efficacy and safety of vimseltinib in patients with
TGCT who are not amenable to surgery. In Part 1 of the study, eligible study participants will be assigned to receive either 30 mg twice weekly vimseltinib (n=80) or matching
placebo (n=40) for 24 weeks. Participants assigned to placebo in Part 1 will have the option to receive vimseltinib for Part 2 of the study. Part 2 is a long-term treatment phase in
which all participants will receive open-label vimseltinib. The primary endpoint of the study is ORR at 25 weeks as measured by RECIST v1.1 by blinded independent central
review.

Ongoing Phase 1/2 Study of Vimseltinib in Patients with TGCT

We have an ongoing open-label Phase 1/2 study designed to evaluate the safety, efficacy, PK, and PD of vimseltinib in patients with solid tumors and TGCT. The dose
escalation portion of our Phase 1/2 study is a single arm study of vimseltinib that is designed to evaluate the safety, PK, and PD of multiple doses of vimseltinib in approximately 60
patients with malignant solid tumors and TGCT patients not amenable to surgery. The dose escalation portion of the study was designed to determine the Phase 2 dose and the MTD
using a 3+3 dose escalation design with a minimum of three patients enrolled in each dose level cohort; starting at a dose of 10 mg once daily. Loading doses administered in the
second cohort and subsequent cohorts were based on PK profiles observed in the first cohort. Based on the results from the dose escalation portion of the study, in November 2020,
we announced the selection of a Phase 2 dose for, and initiated, the expansion portion of the study in patients with TGCT not amenable to surgery. The expansion portion of the study
is designed to evaluate the safety, tolerability, preliminary antitumor activity, PK, PD, and patient reported outcomes of vimseltinib in TGCT.

In September 2021, at the ESMO Congress 2021, we announced the presentation of preliminary data from the ongoing Phase 1 dose escalation portion of the study and from

cohort A in the Phase 2 expansion portion of the study. Cohort A includes TGCT patients with no prior anti-CSF1/CSF1R (previous therapy with imatinib or nilotinib is eligible) and
cohort B includes patients with prior anti-CSF1/CSF1R (previous therapy with imatinib or nilotinib alone is not eligible).

As of the June 7, 2021 cutoff date, 68 TGCT patients were treated with vimseltinib and included in the safety population, including 32 TGCT patients enrolled in the Phase 1

dose escalation portion of the study and 36 TGCT patients enrolled in cohort A in the Phase 2 portion of the study. Efficacy data presented was from 51 TGCT patients, including all
32 TGCT patients enrolled in the Phase 1 dose escalation portion of the study and 19 TGCT patients enrolled in cohort A in the Phase 2 portion of the study that were evaluable for
efficacy as of the cutoff date.

Thirty-two patients enrolled in Phase 1 dose escalation portion of the study and 36 patients enrolled in Phase 2 cohort A expansion portion of the study as follows: Phase 1
cohort 5 (n=8): 30 mg loading dose daily for five days followed by a maintenance dose of 30 mg twice a week; Phase 1 cohort 8 (n=12): 30 mg loading dose daily for three days
followed by a maintenance dose of 10 mg daily; Phase 1 cohort 9 (n=12): 20 mg loading dose daily for three days followed by a maintenance dose of 6 mg daily; and Phase 2 cohort
A (n=36): 30 mg twice weekly (no loading dose). Twelve out of 32 patients (38%) in Phase 1 and 32 out of 36 patients (89%) in Phase 2 cohort A had at least one prior surgery; five
patients (16%) in Phase 1 and two patients (6%) in Phase 2 cohort A had received at least one prior systematic therapy. Fifty-one patients were evaluable for efficacy by RECIST
v1.1 at the data cutoff in Phase 1 across all dose cohorts and in Phase 2 cohort A. Response data is based on independent central radiologic review with the exception of one patient
who had a local assessment, and for whom no central assessment was performed.

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Of the 51 efficacy-evaluable patients in Phase 1 across all dose cohorts and in the Phase 2 cohort A, 24 patients had a response resulting in an ORR (by best overall response)

of 47%. Of the 32 patients in Phase 1, 16 patients achieved an objective response for an ORR (by best overall response) of 50% with durable responses observed across all dose
cohorts, including one complete response in cohort 5. The median duration of treatment for all patients was 10.1 months. As of the data cutoff date, 72% of patients remained active
in the study. Of the 36 patients enrolled in Phase 2 cohort A, 19 patients were evaluable for efficacy, of which there were eight patients with an objective response for an ORR (by
best overall response) of 42%. Of the 19 patients, 10 had more than one follow-up imaging assessment and two responses occurred at later scans. The median duration of treatment
for all patients was 1.9 months. The study is ongoing and follow-up evaluation is continuing with 83% of patients remaining active as of the data cutoff date.

In both Phase 1 and Phase 2 cohort A, treatment with vimseltinib was generally well tolerated in patients with TGCT. The majority of the common (≥15%) TEAEs were Grade

2 or lower. Two patients (6%) discontinued treatment due to a TEAE in Phase 1 and one patient (3%) discontinued treatment due to an TEAE in Phase 2 cohort A. Two patients
experienced SAEs at least possibly related to vimseltinib, including metabolic encephalopathy and vaginal hemorrhage in Phase 1; no treatment-related SAEs were reported in Phase
2 cohort A. Observed transaminase, pancreatic, and creatine phosphokinase enzyme elevations were mostly low grade, asymptomatic, and consistent with mechanism of action of
CSF1R inhibitors. No abnormalities in bilirubin levels were reported. In the second half 2022, we plan to provide updated data from our Phase 1/2 study of vimseltinib in TGCT
patients.

DCC-3116: ULK Kinase Inhibitor for RTK/RAS/MAPK Driven Cancers

DCC-3116 is a potential first-in-class investigational, orally administered, potent, and highly selective switch-control inhibitor of the ULK kinase. DCC-3116 is designed to
inhibit autophagy, a key tumor survival mechanism in cancer cells, by inhibiting the ULK kinases, which have been shown to be the initiating factors that activate autophagy. We
believe that DCC-3116, in combination with RTK/RAS/MAP kinase signaling pathway inhibition has the potential to change the treatment of RTK/RAS/MAPK driven cancers, if
approved.

DCC-3116 is being studied in a Phase 1 study designed to evaluate the safety, tolerability, clinical activity, PK, and PD of DCC-3116 as a single agent and in combination with
trametinib, an FDA approved MEK inhibitor, in patients with advanced or metastatic tumors with a RAS or RAF mutation. The clinical development plan for DCC-3116 will initially
focus on documented RAS and RAF cancer mutations, which we believe utilize autophagy for tumor growth, survival, and as a resistance mechanism to inhibitors of RTK, RAS, and
MAP kinases. Following the dose escalation phase and subject to the selection of a recommended Phase 2 dose, expansion cohorts in combination with trametinib are currently
planned in patients with advanced or metastatic pancreatic ductal adenocarcinoma with KRAS or BRAF mutations, non-small cell lung cancer with KRAS, NRAS or BRAF
mutations, colorectal cancer with KRAS, NRAS or BRAF mutations, and melanoma with NRAS or BRAF mutations. In June 2021, we announced dosing of the first patient in the
Phase 1, multicenter, open-label, first-in-human study of DCC-3116. In 2022, we plan to continue to enroll patients and expect to provide initial Phase 1 dose escalation data as well
as additional preclinical data on DCC-3116. Following and subject to the selection of a recommended Phase 2 dose of DCC-3116 from the monotherapy dose escalation portion of
the Phase 1 study of DCC-3116, we plan to initiate the Phase 1 combination dose escalation cohorts with trametinib in 2022 and, subject to feedback from regulatory authorities,
expand this study to add a combination with a mutant KRAS G12C inhibitor in non-small cell lung cancer patients.

Market Opportunity in DCC-3116

Autophagy is a catabolic process in which cells recycle their components as a source of energy. Cancer cells can activate this pathway as an escape mechanism from anti-

cancer therapy. Significant scientific evidence exists that inhibition of the MAPK pathway elicits autophagy and protects cancer cells from the cytotoxic effects of targeted inhibition
along either pathway. ULK kinases are the initiating factors in autophagy and DCC-3116, a potent and selective inhibitor of ULK kinases, is being studied to explore its potential to
inhibit this important mechanism of cancer cell survival. Our preclinical studies have demonstrated the potential for DCC-3116 to inhibit autophagy related resistance to inhibitors of
the MAPK pathway.

Inhibition anywhere along the MAPK pathway in cells containing a tumor driver mutation activates ULK and autophagy. These tumor driver mutations may occur within
RTKs and multiple nodes along these pathways, such as RAS and RAF. With this broad potential role of autophagy as a survival/resistance pathway to MAPK and RTK inhibition,
there is a significant opportunity for DCC-3116 to provide benefit across a broad spectrum of solid tumors. Specifically, RTK/RAS/RAF mutations are known to occur in
approximately 70% of human cancers. While we do not intend to pursue all potential combination approaches within these pathways, we believe the opportunity for DCC-3116 as a
potential first-in-class inhibitor is substantial.

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Mechanism of Action and Preclinical Profile of DCC-3116

DCC-3116 is designed to treat cancer patients in combination with RTK/RAS/MAP kinase signaling pathway inhibitors. Autophagy is a survival pathway in which cells
respond to stress by recycling their own components and/or clearing damaged organelles and proteins from the cell. RTK, RAS, and MAP kinase pathway driven cancers are reported
to have high basal levels of autophagy, which these cancers use to maintain nutrient supply, and regulate cancer cell metabolism and survival. Autophagy has been observed to be
upregulated in mutant cancers and is also known to mediate resistance to inhibitors of RTK/RAS/MAP kinase signaling pathways.

Cellular studies in RTK, RAS, and MAP kinase driven cancers have demonstrated that treatment with RTK, RAS, and MAP kinase pathway inhibitors, as well as other
signaling pathway inhibitors, can induce ULK activation and autophagic flux as a compensatory survival mechanism. Autophagic flux is the cellular induction of the formation of
autophagosomes and their ultimate fusion with lysosomes. Such induction is seen with MAP kinase pathway inhibitors such as RAF, MEK, and ERK inhibitors, direct inhibitors of
the RAS pathway including inhibitors of mutant KRAS G12C, as well as RTK inhibitors, such as EGFR inhibitors. In in vivo models inhibition of autophagy by DCC-3116
combined with inhibitors of RTK/RAS/MAP kinase signaling has demonstrated additive or synergistic anti-tumor activity.

In the figure below, two key signaling pathways are shown: the MAPK pathway and the PI3K pathway, which are activated in cancer cells by RTK/RAS/RAF mutations. RTK

and RAS mutations activate both of these pathways and RAF mutations activate the MAPK pathway in cancer cells. Both the MAPK and PI3K pathways negatively regulate ULK
kinase activity, i.e. ULK kinase activity is diminished when the MAPK and/or PI3K pathways are activated. Conversely, when the MAPK and/or PI3K pathways are inhibited by
targeted therapies, such as with an RTK inhibitor, the negative regulation of ULK kinase is released, which has been shown to result in increased activation of ULK kinase and
downstream autophagic flux.

We have shown in preclinical studies that inhibiting the ULK kinase in combination with an inhibitor of key nodes in these pathways results in additive or synergistic inhibition

of tumor growth in vivo. For example, in in vivo studies at the RTK node, DCC-3116 exhibited additivity or synergy with the inhibitors of the EGFR RTK, osimertinib, or afatinib,
resulting in tumor regression in EGFR-mutant non-small cell lung cancer. In addition, in in vivo studies at the RAS node, DCC-3116 exhibited additivity or synergy with a direct
inhibitor of KRAS G12C, sotorasib, resulting in tumor regression in KRAS G12C-mutant non-small cell lung cancer. Also in in vivo studies at the MEK node, DCC-3116 exhibited
additivity or synergy in combination with the MEK inhibitor, trametinib, inhibiting tumor growth in RAS-mutant pancreatic and lung, and BRAF-mutant melanoma in xenograft
tumor growth. In composite, inhibition along the MAPK or PI3K pathways has the potential to activate ULK and autophagy if there is a tumor driver mutation upstream of that node
in the pathway. We believe inhibition of ULK by DCC-3116 in combination with an inhibitor of RTK/RAS/RAF is potentially a promising approach for the treatment of mutant
RTK/RAS/RAF cancers.

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Combination of DCC-3116 with RTK Inhibitors - Preclinical Demonstration with EGFR Inhibitors

In our preclinical studies, we have observed DCC-3116 to durably and potently inhibit ULK activation and autophagic flux in various cancer cell lines through the inhibition of

ULK kinases. Our in vitro studies have also demonstrated that DCC-3116 in combination with inhibitors of the RTK/RAS/MAP kinase pathway inhibits both basal ULK activity
(ULK phosphorylation of downstream substrates in the absence of a MAP kinase pathway inhibitor) and also RTK/RAS/MAPK pathway inhibitor-induced increased ULK kinase
activation in various cancer cell lines as measured by the decrease in phosphorylation of the cellular ULK autophagy substrate ATG13.

For example, DCC-3116 has been shown preclinically to inhibit autophagy induced by mutant EGFR inhibitors. In the left panel in the figure below, when evaluated in vitro,

osimertinib and afatinib induced ULK phosphorylation of ATG13 in the EGFR L858R/T790M mutant non-small cell lung cancer cell line H1975. Gefitinib and erlotinib, two EGFR
inhibitors that are not able to inhibit the L858R/T790M EGFR mutant in H1975 cells, did not increase ULK phosphorylation of ATG13. These results appear to demonstrate that
ULK activation may be linked to specific inhibition of the mutant EGFR kinase. In the below figure in the left panel, our in vitro studies demonstrated that DCC-3116 in combination
with osimertinib or afatinib inhibits both basal ULK activity and EGFR inhibitor-induced increased ULK kinase activation.

In the middle panel of the figure, autophagic flux was monitored by measuring the fluorescence of mCherry and green fluorescent protein (GFP) in H1975 cells stably
transfected with a construct encoding an mCherry-LC3-GFP fusion protein. LC3 is an autophagy protein that is incorporated into autophagosomes. GFP is sensitive to the pH of the
lysosome, whereas mCherry is not. If autophagic flux is induced and autophagosomes fuse with lysosomes, GFP fluorescence is lost, resulting in an increase in mCherry versus GFP
fluorescence. Osimertinib and afatinib were demonstrated to induce autophagic flux over time in this cell line, while DCC-3116 inhibited osimertinib- or afatinib-induced autophagic
flux to near baseline levels in this in vitro model.

In the right panel of the figure, in an in vivo H1975 lung cancer xenograft model, DCC-3116 as a single agent demonstrated partial or no inhibition of tumor growth. However,

when DCC-3116 was evaluated in combination with osimertinib, synergistic inhibition of tumor growth and regression were observed compared to single agent treatments.

Combination of DCC-3116 with RAS Inhibitors – Preclinical Demonstration with KRAS G12C Inhibitors

In addition, DCC-3116 has demonstrated preclinically to inhibit autophagy induced by mutant KRAS G12C inhibitors. In the left panel in the figure below, when evaluated in

vitro, adagrasib and sotorasib, two KRAS G12C inhibitors, induced ULK phosphorylation of ATG13 in the KRAS G12C mutant non-small cell lung cancer cell line H358. In the
below figure in the left panel, our in vitro studies demonstrated that DCC-3116 in combination with adagrasib or sotorasib inhibited both basal ULK activity and KRAS inhibitor-
induced increased ULK kinase activation.

In the middle panel of the figure, autophagic flux was monitored by measuring the fluorescence of mCherry and GFP in H358 cells stably transfected with a construct encoding

an mCherry-LC3-GFP fusion protein. Adagrasib and sotorasib were

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demonstrated to induce autophagic flux over time in this cell line, while DCC-3116 inhibited adagrasib- or sotorasib-induced autophagic flux to near baseline levels in this in vitro
model.

In the right panel of the figure, in an in vivo H358 lung cancer xenograft model, DCC-3116 as a single agent exhibited partial inhibition of tumor growth, similar to single
agent treatment with sotorasib. When DCC-3116 was evaluated in combination with sotorasib, additive inhibition of tumor growth was observed, which resulted in tumor regression
during the dosing period.

Combination of DCC-3116 with MAPK Pathway Inhibitors - Preclinical Demonstration with MEK Inhibitor

DCC-3116 also has demonstrated preclinically to inhibit autophagy induced by MEK inhibitors, such as trametinib. In the left panel in the figure below, when evaluated in

vitro, trametinib induced ULK phosphorylation of ATG13 in the KRAS mutant pancreatic cancer cell line MiaPaca-2. In the below figure in the left panel, our in vitro studies
demonstrated that DCC-3116 in combination with trametinib inhibited both basal ULK activity and MEK inhibitor-induced increased ULK kinase activation.

In the middle panel of the figure, autophagic flux was monitored by measuring the fluorescence of mCherry and GFP in MiaPaca-2 cells stably transfected with a construct
encoding an mCherry-LC3-GFP fusion protein. Trametinib was demonstrated to induce autophagic flux over time in this cell line, while DCC-3116 inhibited trametinib-induced
autophagic flux to near baseline levels in this in vitro model.

In the right panel of the figure, in an in vivo MiaPaca-2 pancreatic cancer xenograft model, DCC-3116 as a single agent exhibited partial or no inhibition of tumor growth.

When DCC-3116 was evaluated in combination with trametinib, tumor growth inhibition was greater than observed with single agent trametinib.

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Platform Development and Preclinical Pipeline

We are making a focused investment in our next generation of research programs, which are designed to provide first-in-class or best-in-class treatments using our proprietary

switch-control inhibitor platform. Our goal for 2022 is to nominate a development candidate for our pan-RAF research program, which targets inhibition of BRAF and CRAF
kinases. We also plan to continue to develop our in-licensed research-stage program, which targets the VPS34 kinase.

In-License Agreement

In August 2021, we entered into an agreement with Sprint Bioscience (Sprint) to exclusively in-license worldwide rights to a research-stage program targeting the VPS34
kinase (the Sprint Agreement). For further details on the Sprint Agreement, please read Note 11, In-License Agreement, to the consolidated financial statements included in this Form
10-K.

Out-License of QINLOCK in Greater China

In June 2019, we entered into the Zai License Agreement, pursuant to which we granted Zai exclusive rights to develop and commercialize the Licensed Products in Greater

China, also referred to as the Territory. We retain exclusive rights to, among other things, develop, manufacture, and commercialize the Licensed Products outside the Territory.

Pursuant to the terms of the Zai License Agreement, as of February 2022, we received an upfront cash payment of $20.0 million and three development milestone payments

totaling $12.0 million and will be eligible to receive up to $173.0 million in potential development and commercial milestone payments, consisting of up to $38.0 million of
development milestones and up to $135.0 million of commercial milestones. In addition, during the term of the Zai License Agreement, Zai will be obligated to pay us tiered
percentage royalties ranging from low to high teens on annual net sales of the Licensed Products in the Territory, subject to adjustments in specified circumstances. Additionally,
certain costs incurred by the Company associated with the Zai License Agreement are reimbursed by Zai.

Subject to the terms and conditions of the Zai License Agreement, Zai will be responsible for conducting the development and commercialization activities in the Territory

related to the Licensed Products.

In February 2020, we entered into a Supply Agreement (the Zai Supply Agreement) with Zai, as required by terms in the Zai License Agreement, pursuant to which we will

supply the Licensed Products to Zai for use in the Territory for clinical trials as well as commercial inventory, if QINLOCK obtained regulatory approval in the Territory. Subject to
the Zai Supply Agreement, costs incurred by us for external manufacturing services are reimbursed by Zai. In March 2021, QINLOCK was approved by the NMPA for the treatment
of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib, and was approved by the Hong Kong Department of
Health for the treatment of adult patients with advanced GIST who have received prior treatment with imatinib, sunitinib, and regorafenib. In September 2021, QINLOCK was
approved by the Taiwan Food and Drug Administration. Subject to the Zai Supply Agreement, costs incurred by the Company for clinical and commercial supply are reimbursed by
Zai.

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Subject to specified exceptions, during the term of the Zai License Agreement, each party has agreed that neither it nor its affiliates nor, with respect to Zai, its sublicensees,
will conduct any development, manufacturing, and commercialization activities in the Territory that may be deemed competitive with the Licensed Products. In addition, under the
Zai License Agreement, each party has granted the other party specified intellectual property licenses to enable the other party to perform its obligations and exercise its rights under
the Zai License Agreement, including license grants to enable each party to conduct research, development, and commercialization activities pursuant to the terms of the Zai License
Agreement.

The Zai License Agreement will continue on a Licensed Product-by-Licensed Product and region-by-region basis until the later of (i) the abandonment, expiry, or final
determination of invalidity of the last valid claim within our patent rights that covers the Licensed Product in such region in the Territory; (ii) the expiry of the regulatory exclusivity
for such Licensed Product in such region; or (iii) the close of business of the day that is exactly ten years after the date of the first commercial sale of such Licensed Product in such
region. Subject to the terms of the Zai License Agreement, Zai may terminate the Zai License Agreement for convenience by providing written notice to us, which termination will
be effective following a prescribed notice period. In addition, we may terminate the Zai License Agreement under specified circumstances if Zai or certain other parties challenge our
patent rights or if Zai or its affiliates do not conduct certain development activities with respect to one or more Licensed Products for a specified period of time, subject to specified
exceptions. Either party may terminate the Zai License Agreement for the other party's uncured material breach of a material term of the Zai License Agreement, with a customary
notice and cure period, or insolvency. After termination (but not natural expiration), we are entitled to retain a worldwide and perpetual license from Zai to exploit the Licensed
Products. On a region-by-region and a Licensed Product-by-Licensed Product basis, upon the natural expiration of the Zai License Agreement as described above, the licenses
granted by us to Zai under the Zai License Agreement in such region with respect to the Licensed Product become fully paid-up, perpetual, and irrevocable.

Commercial Operations

For QINLOCK, we have established our own commercial and marketing organization in the U.S. and in key European markets we have built a targeted infrastructure to
commercialize QINLOCK in Germany and France, and plan to provide access to QINLOCK in additional European countries through other channels. In addition, we have entered
into distributor arrangements in certain countries including Australia and Canada, and may in the future enter into additional select distributor arrangements to offer QINLOCK to
geographies where we do not intend to distribute QINLOCK on our own, or to selectively establish partnerships, such as the Zai license for Greater China described above, in other
markets outside the U.S. In the U.S., we have built a specialist sales force to target physicians who are high prescribers of treatments for GIST, including key opinion leaders at
academic centers of excellence, as well as to call on community oncologists and sarcoma doctors with eligible GIST patients. Our sales force is supported by sales management,
internal sales support, an internal marketing group, and distribution support. Additionally, our sales and marketing teams manage relationships with key accounts such as managed
care organizations, group purchasing organizations, hospital systems, physician group networks, and government accounts.

In addition, we will consider entering into relationships with strategic partners that enable the expansion of the ongoing clinical development and/or licenses for development

and commercialization or distribution in geographies where we do not intend to distribute QINLOCK on our own, while retaining significant value for our shareholders. These
pharmaceutical company partnerships could focus on specific patient populations and their caregivers, on regional development, or on distribution and sales.

Manufacturing and Supply

We do not own or operate, and have no plans to establish, any manufacturing facilities. We produce limited quantities of drug substance for evaluation in our research
programs. We currently rely on third parties to manufacture our drug candidates for preclinical and clinical testing, as well as for the commercial manufacture of our current and any
future drugs. To date, we have obtained drug substance and drug product from third-party manufacturers for QINLOCK, vimseltinib, and DCC-3116 to support preclinical and
clinical testing and commercial supply of QINLOCK. We have only limited supply arrangements in place with respect to our drug candidates and sole source supplier arrangements
for our commercial supply of drug substance and finished drug product for QINLOCK. We acquire many key materials on a purchase-order basis. While we have commercial supply
arrangements for our drug substance and finished drug product for QINLOCK, we do not have any long-term supply arrangements in place with respect to our drug candidates and
other materials. Furthermore, we do not currently have arrangements in place for redundant supply or a second source of drug substance or drug product. We rely on our sole source
suppliers to manufacture all of our drug substance and finished drug product for commercialization of QINLOCK unless and until we add additional sources. We do not currently
have a validated manufacturing process in place for any drug candidate, other than our approved drug, QINLOCK, which would be required to support commercialization of any of
our drug candidates, if approved.

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QINLOCK and all of our drug candidates are compounds of low molecular weight, generally called small molecules. As drug substances, they can be manufactured from

readily available or custom synthesized starting materials in reliable and reproducible synthetic processes that are amenable to scale-up. Some, including QINLOCK, may require
specialized processing to optimize performance of the drug product. We expect to continue to develop drug candidates that can be produced cost-effectively at contract
manufacturing facilities.

We generally expect to rely on third parties for the manufacture of any companion diagnostics we may develop.

Competition

The pharmaceutical and biotechnology industries are characterized by rapidly advancing technologies, intense competition and a strong emphasis on proprietary drugs. While

we believe that our technology, development experience, and scientific knowledge provide us with competitive advantages, we face potential competition from many different
sources, including major pharmaceutical, specialty pharmaceutical and biotechnology companies, academic institutions and governmental agencies, and public and private research
institutions. Any drug candidates that we successfully develop and commercialize, including QINLOCK, will compete with existing drugs and new drugs that may become available
in the future.

We compete in the segments of the pharmaceutical, biotechnology, and other related markets that address inhibition of kinases in cancer and other rare genetic diseases. There

are other companies working to develop therapies in the field of kinase inhibition for cancer and other diseases. These companies include divisions of large pharmaceutical
companies and biotechnology companies of various sizes.

Many of the companies against which we are competing or against which we may compete in the future have significantly greater financial resources and expertise in research

and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals, and marketing and selling approved drugs than we do. Mergers and
acquisitions in the pharmaceutical, biotechnology, and diagnostic industries may result in even more resources being concentrated among a smaller number of our competitors.
Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These third
parties compete with us in recruiting and retaining qualified scientific, management, and sales and marketing personnel, establishing clinical trial sites and patient registration for
clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

We could see a reduction or elimination in our commercial opportunity if our competitors develop and commercialize drugs that are safer, more effective, have fewer or less

severe side effects, are approved for broader indications or patient populations, are approved for specific sub-populations, are more convenient, or are less expensive than QINLOCK
or any other drugs that we or our collaborators may develop. Our competitors also may obtain FDA, EMA, or other marketing approval for their drugs more rapidly than we may
obtain approval for ours, which could result in our competitors establishing a strong market position before we or our collaborators are able to enter the market. In addition, our
ability to compete may be affected in many cases by insurers or other third-party payors seeking to encourage the use of generic products. Generic products are currently on the
market for some of the indications that we are pursuing, and additional products are expected to become available on a generic basis over the coming years. We expect that
QINLOCK, and any of our drug candidates that achieve marketing approval, will be priced at a significant premium over any competitive generic products.

The key competitive factors affecting the success of QINLOCK and all of our drug candidates, if approved, are likely to be their efficacy, safety, convenience, price, the

effectiveness of companion diagnostics, the level of generic competition, and the availability of reimbursement from government and other third-party payors.

QINLOCK, and the drug candidates in our clinical programs, if we receive approval for the indications we are targeting, will compete with the drugs discussed below and will

likely compete with other drugs that are currently in clinical trials.

Competition for QINLOCK

On May 15, 2020, QINLOCK was approved by the FDA for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase

inhibitors, including imatinib.

In GIST, the current approved standards of care for unresectable or metastatic patients are first-line imatinib, followed by second-line sunitinib upon imatinib progression,

followed by third-line regorafenib upon sunitinib progression, followed by ripretinib (QINLOCK) after a patient has received prior treatment with three or more kinase inhibitors,
including imatinib. In addition, generic versions of imatinib and sunitinib are available in the U.S. and certain other major markets. In addition, avapritinib was approved by the FDA
in January 2020 for patients with GIST harboring a PDGFRA exon 18 mutation only,

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including PDGFRA D842V mutations. There are pharmaceutical and biotechnology companies developing or marketing treatments for cancer that would be competitive with
QINLOCK, if such drug candidates are approved. Many of these companies are developing cancer therapeutics that are also kinase inhibitors.

With respect to QINLOCK, there are several large pharmaceutical companies and biotechnology companies marketing small molecule drugs or biologic drugs for the treatment

of GIST, including Blueprint Medicines Corporation (Blueprint), Novartis AG (Novartis), Pfizer, Inc. (Pfizer), and Bayer AG (Bayer). We are also aware of pharmaceutical and
biotechnology companies developing drugs for the treatment of GIST including AB Sciences S.A. (ABS), Arog Pharmaceuticals, Inc. (Arog), Chia Tai Tianqing Pharmaceutical
Group CO., LTD (CTTPG), Cogent Biosciences, Inc. (Cogent), Daiichi Sankyo Company, Limited (Daiichi), Exelixis, Inc. (Exelixis), Immunicum AB (Immunicum), Jiangsu
HengRui, Inc. (Jiangsu), Merck KGaA (Merck), Ningbo Tai Kang Medical Technology Co. Ltd. (NTKMT), Novartis, Taiho Pharmaceutical Co. Ltd (Taiho), Theseus
Pharmaceuticals (Theseus), and Xencor, Inc. (Xencor). Several of these programs are in clinical studies, including but not limited to Arog, CTTPG, Cogent, Immunicum, Jiangsu,
NTKMT, and Theseus.

Competition for Vimseltinib

We are developing vimseltinib, a potent, and highly selective switch-control kinase inhibitor of CSF1R, for the treatment of patients with TGCT. If vimseltinib receives
marketing approval, we may face competition from other companies marketing or developing antibodies and small molecules targeting CSF1R for TGCT, including Abbisko
Therapeutics Co., Ltd. (Abbisko), AmMax Bio, Inc. (AmMax), Daiichi, SynOx Therapeutics Ltd (SynOx), and HUTCHMED (China) Limited (HutchMed). These programs are also
in clinical studies for TGCT. In addition, pexidartinib is the only FDA approved product, which is indicated for the treatment of adult patients with symptomatic TGCT associated
with severe morbidity or functional limitations and not amenable to improvement with surgery.

Competition for DCC-3116

We are developing DCC-3116, an ULK inhibitor designed to address mutant RAS and RAF cancers. We are aware of other companies that are advancing programs targeting

ULK, including Endeavor Biomedicines, Inc. and Erasca, Inc.

Intellectual Property

We strive to protect the proprietary technologies that we believe are important to our business, including pursuing and maintaining patent protection intended to cover the
composition of matter of our drug and drug candidates, for example, QINLOCK, vimseltinib, and DCC-3116, their methods of use, related technologies, and other inventions that are
important to our business. In addition to patent protection, we also rely on trade secrets to protect aspects of our business that are not amenable to, or that we do not consider
appropriate for, patent protection, including our proprietary switch-control kinase inhibitor platform.

Our commercial success depends in part upon our ability to obtain and maintain patent and other proprietary protection for our approved drug and drug candidates and other

commercially important technologies, inventions, and know-how related to our business, defend and enforce our intellectual property rights, in particular, our patent rights, preserve
the confidentiality of our trade secrets, and operate without infringing valid and enforceable intellectual property rights of others.

The patent positions for biotechnology and pharmaceutical companies like us are generally uncertain and can involve complex legal, scientific, and factual issues. We cannot

predict whether the patent applications we are currently pursuing will issue as patents in any particular jurisdiction or whether the claims of any issued patents will provide sufficient
proprietary protection from competitors. In addition, the coverage claimed in a patent application can be significantly reduced before a patent is issued, and its scope can be
reinterpreted and even challenged after issuance. As a result, we cannot guarantee that our drug or any of our drug candidates will be protected or remain protectable by enforceable
patents. Moreover, any patents that we hold may be challenged, circumvented, or invalidated by third parties. For more information regarding the risks related to our intellectual
property please see "Risk Factors—Risks Related to Our Intellectual Property."

With regard to QINLOCK (ripretinib), as of January 31, 2022, we own five issued U.S. patents with composition of matter and, method of use, and drug product claims. One
issued U.S. patent is expected to expire in 2030, two issued U.S. patents, are expected to expire in 2032 and two are expected to expire in 2040. In addition, we own related patents
and pending patent applications in Europe, Australia, South America, and Asia that are also expected to expire between 2032 and 2040. In addition, we also own ten pending U.S.
applications, and related pending applications in Europe, Australia, South America, and Asia, as well as three pending Patent Cooperation Treaty (PCT) patent applications directed
to methods of use and drug product of QINLOCK (ripretinib). If one or more patents claiming priority to these patent applications is granted, it is expected to expire

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between 2037 and 2040. We also own four pending U.S. provisional applications that relate to QINLOCK (ripretinib). If one or more patents claiming priority to these provisional
applications is granted, it is expected to expire in 2042.

With regard to vimseltinib, as of January 31, 2022, we own two issued U.S. patent with composition of matter and method of use claims. The issued U.S. patents are expected
to expire between 2034 and 2040. In addition, we own one pending U.S. application which, if granted, is expected to expire in 2039, and related patents and pending applications in
Australia, Canada, Asia, Europe and South America that are expected to expire between 2034 and 2039.

With regard to DCC-3116, as of January 31, 2022, we own three pending U.S. applications with composition of matter and method of use claims. In addition, we own related

pending applications in Australia, Canada, Asia, Africa, Middle East, Europe, and South America. If one or more patents claiming priority to these patent applications is granted, it is
expected to expire in 2040.

With regard to our early-stage research programs, as of January 31, 2022, we own seven pending U.S. applications and have seven pending PCT applications. If one or more

patents claiming priority to these patent applications is granted, it is expected to expire in 2041. We also own five pending U.S. provisional applications. If one or more patents
claiming priority to these provisional applications is granted, it is expected to expire in 2042.

With regard to the portfolio in-licensed from Sprint as of January 31, 2022, we have worldwide rights to four issued U.S. patents, six pending U.S. applications, and related

patents and applications in Australia, Canada, Asia, and Europe. The patents which have issued or, if one or more patents claiming priority to these patent applications is granted, are
expected to expire in 2037.

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 U.S., the term of a patent covering an FDA-approved drug may, in certain cases, be eligible for a patent term extension under the Drug Price Competition and Patent
Term Restoration Act of 1984, commonly referred to as the Hatch-Waxman Act, as compensation for the loss of patent term during FDA regulatory review process. The period of
extension may be up to five years, but cannot extend the remaining term of a patent beyond a total of 14 years from the date of product approval. Only one patent among those
eligible for an extension and only those claims covering the approved drug, a method for using it, or a method for manufacturing it may be extended. Similar provisions are available
in Europe and in certain other jurisdictions to extend the term of a patent that covers an approved drug. It is possible that issued U.S. patents covering QINLOCK and vimseltinib
may be entitled to patent term extensions. We have applied for patent term extensions that, if granted, may extend the patent term of one of our granted U.S. patents and the patent
terms of our two issued Australian patents for QINLOCK. We have obtained a Certificate of Supplementary Protection for our issued patent in Canada, extending the patent expiry
date until 2034. We also intend to seek patent term extensions in any jurisdictions where they are available, however, there is no guarantee that the applicable authorities, including
the FDA, will agree with our assessment of whether such extensions should be granted, and even if granted, the length of such extensions.

In addition to patent protection, we also rely on trade secret protection for our proprietary information that is not amenable to, or that we do not consider appropriate for, patent

protection, including, for example, our proprietary switch-control kinase inhibitor platform and certain aspects of our manufacturing processes. However, trade secrets can be
difficult to protect. Although we take steps to protect our proprietary information, including restricting access to our premises and our confidential information, as well as entering
into agreements with our employees, consultants, advisors, and potential collaborators, such individuals may breach such agreements and disclose our proprietary information
including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. In addition, third parties may independently develop the same or similar
proprietary information or may otherwise gain access to our proprietary information. As a result, we may be unable to meaningfully protect our trade secrets and proprietary
information. For more information regarding the risks related to our intellectual property please see "Risk Factors—Risks Related to Our Intellectual Property."

Government Regulation

Government authorities in the U.S. at the federal, state, and local level and in other countries extensively regulate, among other things, the research and clinical development,

testing, manufacture, quality control, approval, labeling, packaging, storage, record-keeping, promotion, advertising, distribution, post-approval monitoring and reporting, marketing,
pricing, and export and import of drug products, such as those we are developing. Generally, before a new drug can be marketed, considerable data demonstrating its quality, safety,
and efficacy must be obtained, organized into a format specific to each regulatory authority, submitted for review, and approved by the regulatory authority.

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Drugs are also 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 require the expenditure of substantial time and financial resources. Failure to comply with the applicable regulatory
requirements at any time during the product development process, approval process, or after approval, may subject an applicant to administrative or judicial sanctions. These
sanctions could include, among other actions, the regulatory authority's refusal to approve pending applications, withdrawal of an approval, clinical holds, untitled or warning letters,
voluntary product recalls or withdrawals from the market, product seizures, total or partial suspension of production or distribution, injunctions, debarment, fines, refusals of
government contracts, restitution, disgorgement, or civil or criminal penalties. Any agency or judicial enforcement action could have a material adverse effect on us.

U.S. Drug Development

In the U.S., the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act (FDCA) and its implementing regulations. Drugs are also subject to other federal, state,

and local statutes and regulations. Our drug candidates must be approved by the FDA through the NDA process before they may be legally marketed in the U.S. The process required
by the FDA before a drug may be marketed in the U.S. generally involves the following:

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•

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completion of extensive preclinical, sometimes referred to as nonclinical, laboratory tests, animal studies, and formulation studies all performed in accordance with
applicable regulations, including the FDA's good laboratory practice (GLP) regulations;

submission to the FDA of an IND, which must become effective before human clinical trials may begin and must be updated annually;

performance of adequate and well-controlled human clinical trials in accordance with applicable IND and other clinical trial-related regulations, sometimes referred to as
good clinical practices (GCPs) to establish the safety and efficacy of the proposed drug for its proposed indication;

submission to the FDA of a NDA for a new drug;

a determination by the FDA within 60 days of its receipt of a NDA to file the NDA for review;

satisfactory completion of an FDA pre-approval inspection of the manufacturing facility or facilities at which the active pharmaceutical ingredient (API) and finished drug
product are produced to assess compliance with the FDA's current good manufacturing practice requirements (cGMP);

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

FDA review and approval of the NDA prior to any commercial marketing or sale of the drug in the U.S.

The data required to support a NDA are generated in two distinct development stages: preclinical and clinical. For new chemical entities, the preclinical development stage

generally involves synthesizing the active component, developing the formulation, and determining the manufacturing process, as well as carrying out non-human toxicology,
pharmacology, and drug metabolism studies in the laboratory, which support subsequent clinical testing. The conduct of the preclinical tests must comply with federal regulations,
including GLPs. The sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data, any available clinical data or literature, and a
proposed clinical protocol, to the FDA as part of the IND. An IND is a request for authorization from the FDA to administer an investigational drug product to humans. The central
focus of an IND submission is on patient safety and the general investigational plan and the protocol(s) for human trials. The IND automatically becomes effective 30 days after
receipt by the FDA, unless the FDA raises concerns or questions regarding the proposed clinical trials and places the IND on clinical hold within that 30-day time period. In such a
case, the IND sponsor and the FDA must resolve any outstanding concerns or questions before the clinical trial can begin. The FDA also may impose a partial clinical hold that
would limit a trial, for example, to certain doses or for a certain length of time or to a certain number of subjects. The FDA may also impose clinical holds on a drug candidate at any
time before or during clinical trials due to safety concerns or non-compliance. Accordingly, we cannot be sure that submission of an IND will result in the FDA allowing clinical
trials to begin, or that, once begun, issues will not arise that could cause the trial to be suspended or terminated.

The clinical-stage of development involves the administration of the drug candidate to human subjects under the supervision of qualified investigators, generally physicians not

employed by or under the trial sponsor's control, in accordance with GCPs, which include the requirement that all research subjects provide their informed consent for their
participation in any clinical trial. 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. Further, each clinical trial must be reviewed and approved by an independent institutional review board (IRB) at or servicing each institution at

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which the clinical trial will be conducted. An IRB is charged with protecting the welfare and rights of trial participants and considers such items as whether the risks to individuals
participating in the clinical trials are minimized and are reasonable in relation to anticipated benefits. The IRB also approves the informed 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. There are also requirements governing the reporting of ongoing clinical trials
and completed clinical trial results to public registries.

Clinical trials are generally conducted in three sequential phases that may overlap or be combined, known as Phase 1, Phase 2, and Phase 3 trials. Phase 1 trials generally
involve a small number of healthy volunteers who are initially exposed to a single dose and then multiple doses of the drug candidate. The primary purpose of these clinical trials is
to assess the metabolism, pharmacologic action, side effects, tolerability, and safety of the drug. Phase 2 clinical trials typically involve studies in disease-affected patients to
determine the dose required to produce the desired benefits. At the same time, safety and further PK and PD information is collected, as well as identification of possible adverse
effects and safety risks and preliminary evaluation of efficacy. Phase 3 trials generally involve large numbers of patients at multiple sites (from several hundred to several thousand
subjects) and are designed to provide the data necessary to demonstrate the efficacy of the drug for its intended use, its safety in use, and to establish the overall benefit/risk
relationship of the drug and provide an adequate basis for physician labeling. The duration of treatment is often extended to mimic the actual use of a drug during marketing.
Generally, two adequate and well-controlled Phase 3 trials are required by the FDA for approval of a NDA.

A pivotal study is a clinical study that adequately meets regulatory agency requirements for the evaluation of a drug candidate's efficacy and safety such that it can serve as the

primary basis for approval of the drug. Generally, pivotal studies are also Phase 3 studies but may be Phase 2 studies if the trial design provides a well-controlled and reliable
assessment of clinical benefit, particularly in situations where there is an unmet medical need. 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. In certain instances, the FDA
may mandate the performance of Phase 4 clinical trials.

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 adverse reactions, any finding from other clinical studies, tests in laboratory animals, or in vitro testing that suggests a significant risk for
human subjects, or any clinically important increase in the rate of a serious suspected adverse reaction over that listed in the protocol or investigator brochure. The sponsor must
submit an IND safety report within 15 calendar days after the sponsor determines that the information qualifies for reporting. The sponsor also must notify the FDA of any
unexpected fatal or life-threatening suspected adverse reaction within seven calendar days after the sponsor's initial receipt of the information. Phase 1, Phase 2, and Phase 3 trials
may not be completed successfully within any specified period, if at all. The FDA, the IRB, or the clinical trial 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 has been associated with unexpected serious harm to
patients. Additionally, some clinical trials are overseen by an independent group of qualified experts organized by the clinical trial sponsor, known as a data safety monitoring board
or committee. This group provides authorization for whether or not a trial may move forward at designated check points based on access to certain data from the trial. We may also
suspend or terminate a clinical trial based on evolving business objectives and/or competitive climate. Concurrent with clinical trials, companies usually complete additional animal
studies and must also develop additional information about the chemistry and physical characteristics of the drug as well as finalize a process for manufacturing the drug in
commercial quantities in accordance with cGMP requirements. The manufacturing process must be capable of consistently producing quality batches of the drug candidate and,
among other things, cGMPs impose extensive procedural, substantive, and recordkeeping requirements to ensure and preserve the long-term stability and quality of the final drug
product. Additionally, appropriate packaging must be selected and tested, and stability studies must be conducted to demonstrate that the drug candidate does not undergo
unacceptable deterioration over its shelf life.

A manufacturer of an investigational drug for a serious disease or condition is required to make available, such as by posting on its website, its policy on evaluating and
responding to requests for individual patient access to such investigational drug. This requirement applies on the earlier of the first initiation of a Phase 2 or Phase 3 trial of the
investigational drug or, as applicable, 15 days after the drug receives a designation as a breakthrough therapy, fast track product, or regenerative advanced therapy.

Moreover, the Right to Try Act, among other things, provides a federal framework for certain patients to access certain investigational new drug products that have completed a
Phase 1 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

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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.

NDA and the FDA Review Process

Following trial completion, trial data are analyzed to assess safety and efficacy. The results of preclinical studies and clinical trials are then submitted to the FDA as part of a
NDA, along with proposed labeling for the drug and information about the manufacturing process and facilities that will be used to ensure drug quality, results of analytical testing
conducted on the chemistry of the drug, and other relevant information. The NDA is a request for approval to market the drug and must contain adequate evidence of safety and
efficacy, which is demonstrated by extensive preclinical and clinical testing. Data may come from company-sponsored clinical trials intended to test the safety and efficacy of a use
of a drug, or from a number of alternative sources, including studies initiated by investigators. To support marketing approval, the data submitted must be sufficient in quality and
quantity to establish the safety and efficacy of the investigational drug product for a particular indication or indications to the satisfaction of the FDA. FDA approval of a NDA must
be obtained before a drug may be offered for sale in the U.S.

Under the Prescription Drug User Fee Act (PDUFA), as amended, each NDA must be accompanied by a user fee. The FDA adjusts the PDUFA user fees on an annual basis.

According to the FDA's fee schedule, effective from October 1, 2021 through September 30, 2022, the user fee for an application requiring clinical data, such as an original NDA, is
$3,117,218. The PDUFA also imposes an annual prescription drug product program fee for human drugs ($369,413). Fee waivers or reductions are available in certain circumstances,
including a waiver of the application fee for the first application filed by a small business. Additionally, no user fees are assessed on NDAs for products designated as orphan drugs,
unless the product also includes a non-orphan indication.

Within 60 days following submission of an original NDA, the FDA reviews the application to determine if it is substantially complete before the agency accepts it for filing.

The FDA may refuse to file any NDA that it deems incomplete or not properly reviewable at the time of submission, including for failure to pay required fees, and may request
additional information. In this event, the application must be resubmitted with the additional information. The resubmitted application also is subject to review before the FDA
accepts it for filing. The FDA typically makes a decision on whether to accept a NDA for filing within 60 days of receipt. Once the submission is accepted for filing, the FDA begins
an in-depth, substantive review of the NDA. Under the performance goals established under the PDUFA, the FDA has agreed to review 90% of standard NDAs for new molecular
entities (NMEs) in ten months from the filing date and 90% of priority NME NDAs in six months from the filing date. The goals for reviewing standard and priority non-NME
NDAs are ten months and six months, respectively, measured from the receipt date of the application. The FDA does not always meet its PDUFA goal dates for standard and priority
NDAs, and the review process is often significantly extended by FDA requests for additional information or clarification.

After the NDA submission is accepted for filing, the FDA reviews the NDA to determine, among other things, whether the proposed drug is safe and effective for its intended

use, and whether the drug is being manufactured in accordance with cGMP to assure and preserve the drug's identity, strength, quality, and purity. The FDA may refer applications
for novel drugs or drug candidates that present difficult questions of safety or efficacy to an advisory committee, typically a panel that includes clinicians and other experts, for
review, evaluation, and a recommendation as to whether the application should be approved and under what conditions. The FDA is not bound by the recommendations of an
advisory committee, but it considers such recommendations carefully when making decisions. In the course of its review, the FDA may re-analyze the clinical trial data, which could
result in extensive discussions between the FDA and the applicant during the review process. The review and evaluation of a NDA by the FDA is extensive and time consuming and
may take longer than originally planned to complete, and we may not receive a timely approval, if at all.

Before approving a NDA, the FDA typically conducts a pre-approval inspection of the manufacturing facilities for the new drug to determine whether they comply with
cGMPs. The FDA will not approve the drug unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure
consistent production of the drug within required specifications. In addition, before approving a NDA, the FDA may also audit data from clinical trials to ensure compliance with
GCP requirements. After the FDA evaluates the application, manufacturing process, and manufacturing facilities where the drug product and/or its API will be produced, it may 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 indicates that the review cycle of the application is complete and the application is not ready for approval. A Complete Response Letter usually describes
all of the specific deficiencies in the NDA identified by the FDA. The Complete Response Letter may require additional clinical data and/or an additional pivotal clinical trial(s),
and/or other significant, expensive and time-consuming requirements related to clinical trials, preclinical studies, or manufacturing. If a Complete Response Letter is issued, the
applicant may either resubmit the NDA, addressing all of the deficiencies identified in the

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letter, challenge the determination set forth in the letter by requesting a hearing, or withdraw the application. Even if such data and information are submitted, the FDA may
ultimately decide that the NDA 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.

There is no assurance that the FDA will ultimately approve a drug product for marketing in the U.S. and we may encounter significant difficulties or costs during the review

process for any of our drug candidates. If a drug receives marketing approval, the approval may be significantly limited to specific diseases, dosages, or patient subgroups, or the
indications for use may otherwise be limited, which could restrict the commercial value of the drug. Further, the FDA may require that certain contraindications, warnings,
precautions, or adverse events be included in the drug labeling or may condition the approval of the NDA on other changes to the proposed labeling, development of adequate
controls and specifications, or a commitment to conduct post-marketing testing or clinical trials, and surveillance to monitor the effects of approved drugs. For example, the FDA
may require Phase 4 testing which involves clinical trials designed to further assess a drug's safety and may require testing and surveillance programs to monitor the safety of
approved drugs that have been commercialized. The FDA may also place other conditions on approvals including the requirement for a REMS to assure the safe use of the drug. If
the FDA concludes a REMS is needed, the sponsor of the NDA must submit a proposed REMS. The FDA will not approve the NDA without an approved REMS, if required. A
REMS could include medication guides, physician communication plans, or elements to assure safe use, such as restricted distribution methods, patient registries, and other risk
minimization tools. Any of these limitations on approval or marketing could restrict the commercial promotion, distribution, prescription, or dispensing of drugs. Drug approvals
may be withdrawn for non-compliance with regulatory standards or if problems occur following initial marketing.

Special FDA Expedited Review and Approval Programs

The FDA has various programs, including Fast Track Designation, priority review, accelerated approval, and breakthrough designation, that are intended to expedite or
simplify the process for the development and FDA review of drugs that are intended for the treatment of serious or life-threatening diseases or conditions and demonstrate the
potential to address unmet medical needs. The purpose of these programs is to provide important new drugs to patients earlier than under standard FDA review procedures. To be
eligible for a Fast Track Designation, the FDA must determine, based on the request of a sponsor, that a drug is intended to treat a serious or life-threatening disease or condition and
demonstrates the potential to address an unmet medical need. The FDA will determine that a product will fill an unmet medical need if it will provide a therapy where none exists or
provide a therapy that may be potentially superior to existing therapy based on efficacy or safety factors.

The FDA may give a priority review designation to drugs intended to treat serious conditions that offer major advances in treatment or provide a treatment where no adequate

therapy exists. A priority review means that the goal for the FDA to review an application is six months, rather than the standard review of ten months under current PDUFA
guidelines. These six and ten-month review periods are measured from the "filing" date rather than the receipt date for NDAs for NME, which typically adds approximately two
months to the timeline for review and decision from the date of submission. Most products that are eligible for Fast Track Designation are also likely to be considered appropriate to
receive a priority review.

In addition, drugs studied for their safety and effectiveness in treating serious or life-threatening illnesses and that provide meaningful therapeutic benefit over existing
treatments may receive accelerated approval and may be approved on the basis of adequate and well-controlled clinical trials establishing that the drug has 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, that is reasonably likely to
predict an effect on irreversible morbidity or mortality, or other clinical benefit, taking into account the severity, rarity, or prevalence of the condition and the availability or lack of
alternative treatments. The FDA generally requires a sponsor of a drug receiving accelerated approval to perform post-marketing studies to verify and describe the predicted effect on
irreversible morbidity or mortality, or other clinical endpoint. In addition, for products being considered for accelerated approval, the FDA generally requires, unless otherwise
informed by the agency, that all advertising and promotional materials intended for dissemination or publication within 120 days of marketing approval be submitted to the agency
for preapproval and pre-use review. In addition, the drug may be subject to accelerated withdrawal procedures.

Moreover, a sponsor can request designation of a drug candidate as a "breakthrough therapy." A breakthrough therapy is defined as a drug that is intended, alone or in

combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the drug may demonstrate
substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For
drugs and biologics that have been designated as breakthrough therapies, interaction and communication between the FDA and the sponsor of the trial can help to identify the most
efficient path for clinical development while minimizing the number of patients placed in ineffective control regimens. Drugs designated as breakthrough therapies by the FDA may
also be eligible for accelerated approval. The FDA must take certain actions, such as holding timely meetings and providing advice, intended to expedite the development and review
of an application for approval of a breakthrough therapy.

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In addition, the FDA may review applications under RTOR, which, according to the FDA, aims to explore a more efficient review process to ensure that safe and effective
treatments are available to patients as early as possible, while maintaining and improving review quality. Drugs considered for review under RTOR must be likely to demonstrate
substantial improvements over available therapy, which may include drugs previously granted breakthrough therapy designation (BTD) for the same or other indications, and must
have straight-forward study designs and endpoints that can be easily interpreted. RTOR allows the FDA to review much of the data in a NDA earlier, before the applicant formally
submits the complete application. This analysis of the pre-submission package gives the FDA and applicants an early opportunity to address data quality and potential review issues
and allows the FDA to provide early feedback regarding the most effective way to analyze data to properly address key regulatory questions.

Project Orbis is an initiative of the FDA's OCE and, according to the FDA, provides a framework for concurrent submission and review of oncology products among

international partners. For example, in December 2019, for QINLOCK, we submitted our NDA to FDA, and filed an NDS with Health Canada and an AUS MAA with the Australian
Therapeutic Goods Administration in Australia under Project Orbis.

Even if a product qualifies for one or more of the expedited review programs, the FDA may later decide that the product no longer meets the conditions for qualification or

decide that the time period for FDA review or approval will not be shortened. Furthermore, Fast Track Designation, priority review, accelerated approval, BTD, RTOR, and Project
Orbis do not change the standards for approval and may not ultimately expedite the development or approval process.

Pediatric Trials

Under the Pediatric Research Equity Act (PREA), as amended, a NDA or supplement to a NDA for a drug that includes a new active ingredient, new indication, new dosage

form, new dosing regimen, or new route of administration 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 drug is safe and effective. The FDA may grant deferrals for submission of
data or full or partial waivers.

A sponsor who is planning to submit a marketing application for a drug subject to PREA must submit an initial Pediatric Study Plan (PSP) within 60 days of an end-of-Phase 2

meeting or as may be agreed between the sponsor and the FDA. The initial PSP must include an outline of the pediatric study or studies that the sponsor plans to conduct, including
study objectives and design, age groups, relevant endpoints, and statistical approach, or a justification for not including such detailed information, and any request for a deferral of
pediatric assessments or a full or partial waiver of the requirement to provide data from pediatric studies along with supporting information. The FDA and the sponsor must reach
agreement on the PSP. A sponsor can submit amendments to an agreed-upon initial PSP at any time if changes to the pediatric plan need to be considered based on data collected
from preclinical studies, early phase clinical trials, and/or other clinical development programs.

Post-Marketing Requirements

Following approval of a new drug, a pharmaceutical company and the approved drug are subject to continuing regulation by the FDA, including, among other things,

establishment registration and drug listing, monitoring and recordkeeping activities, reporting to the applicable regulatory authorities of adverse experiences with the drug, providing
the regulatory authorities with updated safety and efficacy information, drug sampling and distribution requirements, and complying with promotion and advertising requirements,
which include, among others, standards for direct-to-consumer advertising, restrictions on promoting drugs for uses or in patient populations that are not described in the drug's
approved labeling (known as off-label promotion), limitations on industry-sponsored scientific and educational activities, and requirements for promotional activities involving the
internet. Although physicians may prescribe legally available drugs for off-label uses, the FDA takes the position that manufacturers may not market or promote such off-label uses.
Modifications or enhancements to the drug or its labeling or changes of the site or process of manufacture are often subject to the approval of the FDA and other regulators, which
may or may not be received or may result in a lengthy review process.

Prescription drug advertising is subject to federal, state, and foreign regulations. In the U.S., the FDA regulates prescription drug promotion, including direct-to-consumer
advertising. Prescription drug promotional materials must be submitted to the FDA in conjunction with their first use. Any distribution of prescription drugs and pharmaceutical
samples must comply with the U.S. Prescription Drug Marketing Act, a part of the FDCA. The Drug Supply Chain Security Act (DSCSA) was enacted in 2013 with the aim of
building an electronic system to identify and trace certain prescription drugs distributed in the U.S. The DSCSA mandates phased-in and resource-intensive obligations for
pharmaceutical manufacturers, wholesale distributors, and dispensers over a 10-year period that is expected to culminate in November 2023. The law's requirements include the
quarantine and prompt investigation of a suspect product to determine if it is illegitimate, and notifying trading partners and the FDA of any illegitimate

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product. Drug manufacturers and other parties involved in the supply chain for prescription drug products must also comply with product tracking and tracking requirements, such as
placing a unique product identifier on prescription drug packages. This identifier consists of the National Drug Code, serial number, lot number, and expiration date, in the form of a
2-dimensional data matrix barcode that can be read by humans and machines.

In the U.S., once a drug is approved, its manufacture is subject to comprehensive and continuing regulation by the FDA. FDA regulations require that drugs be manufactured in

specific facilities per the NDA approval and in accordance with cGMP. We rely, and expect to continue to rely, on third parties for the production of clinical and commercial
quantities of our approved drug and drug candidates in accordance with cGMP regulations. cGMP regulations require among other things, quality control and quality assurance as
well as the corresponding maintenance of records and documentation and the obligation to investigate and correct any deviations from cGMP. Drug manufacturers and other entities
involved in the manufacture and distribution of approved drugs are required to register their establishments with the FDA and certain state agencies and are subject to periodic
unannounced inspections by the FDA and certain state agencies for compliance with cGMP and other laws. Accordingly, manufacturers must continue to expend time, money, and
effort in the area of production and quality control to maintain cGMP compliance. These regulations also impose certain organizational, procedural, and documentation requirements
with respect to manufacturing and quality assurance activities. NDA holders using contract manufacturers, laboratories, or packagers are responsible for the selection and monitoring
of qualified firms, and, in certain circumstances, qualified suppliers to these firms. These firms and, where applicable, their suppliers are subject to inspections by the FDA at any
time, and the discovery of violative conditions, including failure to conform to cGMP, could result in enforcement actions that interrupt the operation of any such facilities or the
ability to distribute drugs manufactured, processed, or tested by them. Discovery of problems with a drug after approval may result in restrictions on a drug, manufacturer, or holder
of an approved NDA, including, among other things, recall or withdrawal of the drug from the market, and may require substantial resources to correct.

The FDA also may require post-approval testing, sometimes referred to as Phase 4 testing, risk minimization action plans, and post-marketing surveillance to monitor the

effects of an approved drug or place conditions on an approval that could restrict the distribution or use of the drug. Discovery of previously unknown problems with a drug or the
failure to comply with applicable FDA requirements can have negative consequences, including adverse publicity, judicial, or administrative enforcement, untitled or warning letters
from the FDA, mandated corrective advertising or communications with doctors, and civil or criminal penalties, among others. Newly discovered or developed safety or
effectiveness data may require changes to a drug's approved labeling, including the addition of new warnings and contraindications, and also may require the implementation of other
risk management measures, including a REMS or the conduct of post-marketing studies to assess a newly discovered safety issue. Also, new government requirements, including
those resulting from new legislation, may be established, or the FDA's policies may change, which could delay or prevent regulatory approval of our drug candidates under
development.

Other Regulatory Matters

Manufacturing, sales, promotion, and other activities following drug approval are also subject to regulation by numerous regulatory authorities in addition to the FDA,
including, in the U.S., the Centers for Medicare & Medicaid Services (CMS), other divisions of the U.S. Department of Health and Human Services (HHS), the Drug Enforcement
Administration for controlled substances, the Consumer Product Safety Commission, the Federal Trade Commission, the Occupational Safety & Health Administration, the
Environmental Protection Agency, and state and local governments. In the U.S., sales, marketing, and scientific/educational programs must also comply with state and federal fraud
and abuse laws. 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 Patient Protection and Affordable Care Act as amended by the Health Care and Education Reconciliation Act of 2010 (or collectively, the ACA). If drugs are
made available to authorized users of the Federal Supply Schedule of the General Services Administration, additional laws and requirements apply. The handling of any controlled
substances must comply with the U.S. Controlled Substances Act and Controlled Substances Import and Export Act. Drugs must meet applicable child-resistant packaging
requirements under the U.S. Poison Prevention Packaging Act. Manufacturing, sales, promotion, and other activities are also potentially subject to federal and state consumer
protection and unfair competition laws.

We are subject to numerous foreign, federal, state, and local 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. In addition, our leasing and operation of real property may subject us to liability pursuant to certain
U.S. environmental laws and regulations, under which current or previous owners or operators of real property and entities that disposed or arranged for the disposal of hazardous
substances may be held strictly, jointly, and severally liable for the cost of investigating or remediating contamination caused by hazardous substance releases, even if they did not
know of and were not responsible for the releases.

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The distribution of pharmaceutical drugs is subject to additional requirements and regulations, including extensive record-keeping, licensing, storage, and security

requirements intended to prevent the unauthorized sale of pharmaceutical drugs.

The failure to comply with regulatory requirements subjects firms 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, voluntary recall or seizure of drugs, 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. In addition, even if a firm complies with FDA and other
requirements, new information regarding the safety or efficacy of a product could lead the FDA to modify or withdraw product approval. Prohibitions or restrictions on sales or
withdrawal of our approved drug or any 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 product; or (iv) additional record-keeping requirements. If any such changes
were to be imposed, they could adversely affect the operation of our business.

U.S. Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration, and specifics of the FDA approval of our drug or any of our drug candidates, some of our U.S. patents may be eligible for limited patent

term extension under the Hatch-Waxman Act. The Hatch-Waxman Act permits a patent restoration term of up to five years as compensation for patent term lost during product
development and the FDA regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product's
approval date. The patent term restoration period is generally one-half the time between the effective date of an IND and the submission date of a NDA plus the time between the
submission date of a NDA and the approval of that application. Only one patent may be extended and only those claims covering the approved drug, a method for using it, or a
method for manufacturing it may be extended and the application for the extension must be submitted prior to the expiration of the patent. The U.S. Patent and Trademark Office
(USPTO), in consultation with the FDA, reviews and approves the application for any patent term extension or restoration. We intend to apply for restoration of patent term for one
of our currently owned or licensed patents that cover any drug candidate that receives FDA approval 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.

Marketing exclusivity provisions under the FDCA can also delay the submission or the approval of certain marketing applications for competing products. The FDCA provides
a five-year period of non-patent marketing exclusivity within the U.S. to the first applicant to obtain approval of a 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. During the
exclusivity period, the FDA may not accept for review an abbreviated new drug application (ANDA) or a 505(b)(2) NDA submitted by another company for another drug based on
the same active moiety, regardless of whether the drug is intended for the same indication as the original innovator drug or for another indication. However, an application may be
submitted after four years if it contains a certification of patent invalidity or non-infringement to one of the patents listed with the FDA by the innovator NDA holder. The FDCA also
provides three years of marketing exclusivity for a NDA, or supplement to an existing NDA, if new clinical investigations, other than bioavailability studies, that were conducted or
sponsored by the applicant are deemed by the FDA to be essential to the approval of the application, for example new indications, dosages, or strengths of an existing drug. This
three-year exclusivity covers only the modification for which the drug received approval on the basis of the new clinical investigations and does not prohibit the FDA from approving
ANDAs or 505(b)(2) applications for drugs containing the active agent for the original indication or condition of use. Five-year and three-year exclusivity will not delay the
submission or approval of a full NDA. However, an applicant submitting a full NDA would be required to conduct or obtain a right of reference to all of the preclinical studies and
adequate and well-controlled clinical trials necessary to demonstrate safety and effectiveness. Orphan drug exclusivity, as described below, may offer a seven-year period of
marketing exclusivity, except in certain circumstances. Pediatric exclusivity is another type of regulatory market exclusivity in the U.S. Pediatric exclusivity, if granted, adds six
months to existing exclusivity periods and patent terms. This six-month exclusivity, which runs from the end of other exclusivity protection or patent term, may be granted based on
the voluntary completion of a pediatric trial in accordance with a FDA-issued "Written Request" for such a trial.

Orphan Drug Designation

The FDA may grant Orphan Drug Designation to drugs intended to treat a rare disease or condition that affects fewer than 200,000 individuals in the U.S., or if it affects more
than 200,000 individuals in the U.S., there is no reasonable expectation that the cost of developing and marketing the drug for this type of disease or condition will be recovered from
sales in the U.S. In the EU, the EC, after receiving the opinion of the EMA's Committee for Orphan Medicinal Products (COMP) grants Orphan Drug

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Designation to also promote the development of orphan products. The relevant European legislation provides that a product can be designated as an orphan drug by the EC if its
sponsor can establish that the product is (1) intended for the diagnosis, prevention, or treatment of a life-threatening or chronically debilitating condition; (2) either (i) the prevalence
of the condition is not more than 5 in 10,000 persons in the EU when the application is made, or (ii) without incentives it is unlikely that the marketing of the product in the EU
would generate sufficient return to justify the necessary investment in its development; and (3) exists no satisfactory method of diagnosis, prevention, or treatment of condition
authorized for marketing in the EU or, if such a method exists, the product will be of significant benefit to those affected by the condition, as defined in Regulation (EC) 847/2000.

In the U.S., 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 addition, if a product receives the first FDA approval for the indication for which it has orphan designation, the product is entitled to orphan drug exclusivity, which
means the FDA may not approve any other application to market the same drug for the same indication for a period of seven years, except in limited circumstances, such as a
showing of clinical superiority over the product with orphan exclusivity.

In the EU, Orphan Drug Designation also entitles a party to financial incentives such as reduction of fees or fee waivers and ten years of market exclusivity is granted
following drug or biological product approval. During this market exclusivity period, neither the EMA nor the EC or any of the competent authorities in the EU Member States can
accept an application or grant a marketing authorization for a "similar medicinal product." A "similar medicinal product" is defined as a medicinal product containing a similar active
substance or substances as contained in an authorized orphan medicinal product, and which is intended for the same therapeutic indication. This period may be reduced to six years
if, after five years, it is established that the Orphan Drug Designation criteria are no longer met, including where it is shown that the product is sufficiently profitable not to justify
maintenance of market exclusivity. Market exclusivity may also be revoked in very select cases, such as if (i) it is established that a similar medicinal product is safer, more effective
or otherwise clinically superior; (ii) the marketing authorization holder consents to such revocation; or (iii) the marketing authorization holder cannot supply enough orphan
medicinal product.

Orphan drug exclusivity may be lost if the FDA 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 must be requested before submitting an application for marketing
approval. Orphan drug designation does not convey any advantage in, or shorten the duration of, the regulatory review and approval process.

As of January 1, 2021, a separate process for orphan drug designation applies in Great Britain (GB). There is no pre-marketing authorization orphan designation (as there is in

the EU) and the application for orphan designation is reviewed by the U.K. Medicines and Healthcare products Regulatory Agency (MHRA) the U.K. medicines regulator, at the
time of a MAA. The criteria are the same as in the EU, save that they apply to GB only (e.g. there must be no satisfactory method of diagnosis, prevention or treatment of the
condition concerned in GB).

Regulation of Diagnostic Tests

Some of our drug candidates may require use of a diagnostic test to identify appropriate patient populations for our products. These diagnostics, often referred to as companion
diagnostics, are medical devices, often in vitro devices, which provide information that is essential for the safe and effective use of a corresponding drug. In the U.S., the FDCA and
its implementing regulations, and other federal and state statutes and regulations govern, among other things, medical device design and development, preclinical and clinical testing,
premarket clearance or approval, establishment registration and device listing, manufacturing, labeling, storage, advertising and promotion, sales and distribution, export and import,
and post-market surveillance. Unless an exemption applies, diagnostic tests require marketing clearance or approval from the FDA prior to commercial distribution. The two primary
types of FDA marketing authorization applicable to a medical device are premarket notification, also called 510(k) clearance, and premarket approval application (PMA) approval.
We expect that any companion diagnostic developed for our drug or drug candidates will utilize the PMA pathway.

PMAs must be supported by valid scientific evidence, which typically requires extensive data, including technical, preclinical, clinical, and manufacturing data, to demonstrate
to the FDA's satisfaction the safety and effectiveness of the device. For diagnostic tests, a PMA typically includes data regarding analytical and clinical validation studies. As part of
its review of the PMA, the FDA will conduct a pre-approval inspection of the manufacturing facility or facilities to ensure compliance with the Quality System Regulation, which
requires manufacturers to follow design, testing, control, documentation, and other quality assurance procedures. FDA review of an initial PMA may require several years to
complete. If the FDA evaluations of both the PMA and the manufacturing facilities are favorable, the FDA will either issue an approval letter or an approvable letter, which usually
contains a number of conditions that must be met in order to secure the final approval of the PMA. If the FDA's evaluation of the PMA or manufacturing facilities is not favorable,
the FDA will deny approval of the PMA or issue a not approvable letter.

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A not approvable letter will outline the deficiencies in the application and, where practical, will identify what is necessary to make the PMA approvable. The FDA may also
determine that additional clinical trials are necessary, in which case the PMA approval may be delayed for several months or years while the trials are conducted and then the data
submitted in an amendment to the PMA. Once granted, PMA approval may be withdrawn by the FDA if compliance with post approval requirements, conditions of approval, or
other regulatory standards are not maintained or problems are identified following initial marketing.

On August 6, 2014, the FDA issued a final guidance document addressing the development and approval process for "In Vitro Companion Diagnostic Devices." According to
the guidance, for novel drugs such as our drug or drug candidates, a companion diagnostic device and its corresponding drug should be approved or cleared contemporaneously by
the FDA for the use indicated in the therapeutic product labeling. The guidance also explains that a companion diagnostic device used to make treatment decisions in clinical trials of
a drug generally will be considered an investigational device, unless it is employed for an intended use for which the device is already approved or cleared. If used to make critical
treatment decisions, such as patient selection, the diagnostic device generally will be considered a significant risk device under the FDA's Investigational Device Exemption (IDE)
regulations. Thus, the sponsor of the diagnostic device will be required to comply with the IDE regulations. According to the guidance, if a diagnostic device and a drug are to be
studied together to support their respective approvals, both products can be studied in the same investigational study, if the study meets both the requirements of the IDE regulations
and the IND regulations. The guidance provides that depending on the details of the study plan and subjects, a sponsor may seek to submit an IND alone, or both an IND and an IDE.

In the EU, in vitro medical devices are required to conform with the essential requirements of the EU Directive on in vitro diagnostic medical devices (Directive No 98/79/EC,

as amended). To demonstrate compliance with the essential requirements, the manufacturer must undergo a conformity assessment procedure. The conformity assessment varies
according to the type of medical device and its classification. For low-risk devices, the conformity assessment can be carried out internally, but for higher risk devices it requires the
intervention of an accredited EU Notified Body. If successful, the conformity assessment concludes with the drawing up by the manufacturer of an EC Declaration of Conformity
entitling the manufacturer to affix the European Conformity (CE) mark to its products and to sell them throughout the EU. The in vitro diagnostic medical devices Directive is being
replaced by a new Regulation in the EU. The new Regulation (Regulation (EU) 2017/746) entered into force on 25 May 2017, and is subject to a 5 year transition period during
which manufacturers of in vitro diagnostic medical devices must update their technical information and processes in line with the new Regulation. During the transition period,
manufacturers may elect whether to put any new in vitro diagnostic devices under the Directive's regime or under the regulation of the new Regulation. Under European law, a
Regulation differs from a Directive, as a regulation is directly effective in each Member State, without the need for implementing legislation (which is required for a Directive).

Following the U.K.'s departure from the EU on January 31, 2020, the U.K. (which comprises GB and Northern Ireland) continued to follow the same regulations as the EU
during a transition period which ended on December 31, 2020. Now that this transition period has ended, all in vitro medical devices must be registered with the MHRA before being
placed on the GB market. European CE marks will continue to be recognized in GB until June 30, 2023, following which a U.K.CA mark will be required for an in vitro medical
device to be marketed in GB. The new EU Regulation will not automatically apply in GB, so the regulation of medical devices in GB may diverge from EU regulations in future. The
EU regulatory framework on medical devices will, however, continue to apply in Northern Ireland under the Northern Irish Protocol and medical devices in Northern Ireland may
either carry a European CE mark or a U.K. and Northern Ireland CE (CE U.K.NI) mark (although devices bearing the CE U.K.NI marking will not be accepted on the EU market).

European Drug Development

In Europe, our current or future approved drugs may also be subject to extensive regulatory requirements. As in the U.S., medicinal products can only be marketed if a

marketing authorization from the competent regulatory agencies has been obtained.

Similar to the U.S., the various phases of preclinical and clinical research in Europe are subject to significant regulatory controls. Although the EU Clinical Trials Directive
2001/20/EC (the Directive) sought to harmonize the EU clinical trials regulatory framework, setting out common rules for the control and authorization of clinical trials in the EU,
the EU Member States have transposed and applied the provisions of the Directive differently. This has led to significant variations in the Member State regimes. Under the current
regime, before a clinical trial can be initiated it must be approved in each of the EU Member States where the trial is to be conducted by two distinct bodies: the National Competent
Authority (NCA) and one or more Ethics Committees (ECs). All suspected unexpected serious adverse reactions to the investigated drug that occur during the clinical trial have to be
reported to the NCA and ECs of the member state where they occurred.

In April 2014, a new Clinical Trials Regulation 536/2014 (the Regulation), replacing the current Directive, was adopted. The new Regulation is set to come into effect on

January 31, 2022 and will become directly applicable in all EU Member States

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(without national implementation). The new Regulation seeks to simplify and streamline the approval of clinical trials in the EU. For example, the sponsor shall submit a single
application for approval of a clinical trial via the EU Portal. As part of the application process, the sponsor shall propose a reporting Member State, who will coordinate the
validation and evaluation of the application. The reporting Member State shall consult and coordinate with the other Member States in which the clinical trial is to take place (such
Member States being referred to as the Member States Concerned). If an application is rejected, it can be amended and resubmitted through the EU Portal. If an approval is issued,
the sponsor can start the clinical trial in all Member States Concerned. However, a Member State Concerned can in limited circumstances declare an "opt-out" from an approval. In
such a case, the clinical trial cannot be conducted in that Member State. The Regulation also aims to streamline and simplify the rules on safety reporting and introduces enhanced
transparency requirements such as mandatory submission of a summary of the clinical trial results to the EU Database.

The U.K. has implemented Directive 2001/20/EC into national law through The Medicines for Human Use (Clinical Trials) Regulations 2004, so U.K. regulation of clinical
trials is currently aligned with EU regulations. Whether the U.K. will amend its legislation to align more closely with the new EU Regulation once that comes into effect is as yet
unknown.

European Drug Review and Approval

In the EU, medicinal products can only be commercialized after obtaining an EU marketing authorization. There are two types of marketing authorizations.

The first is the centralized marketing authorization, which is issued by the EC through the centralized procedure, based on the opinion of the Committee for Medicinal Products

for Human Use of the EMA. A centralized marketing authorization is valid throughout the entire territory of the EEA. The centralized procedure is mandatory for certain types of
drugs, including biotechnology medicinal drugs, advanced-therapy medicines (gene-therapy, somatic cell-therapy, or tissue-engineered medicines), orphan medicinal drugs, and
medicinal drugs containing a new active substance indicated for the treatment of HIV or AIDS, cancer, neurodegenerative disorders, diabetes, auto-immune and other immune
dysfunctions, and viral diseases. The CP is optional for drugs containing a new active substance not yet authorized in the EEA, or for drugs that constitute a significant therapeutic,
scientific, or technical innovation or which are in the interest of public health in the EU.

National EU marketing authorizations, which are issued by the competent authorities of the Member States of the EU and only cover their respective territory, are available for

drugs not falling within the mandatory scope of the centralized procedure. Where a drug has already been authorized for marketing in an EU Member State, this national
authorization can be recognized in other Member States through the mutual recognition procedure. If the drug has not received a national authorization in any Member State at the
time of application, it can be approved simultaneously in various Member States through the decentralized procedure. Under the decentralized procedure an identical dossier is
submitted to the competent authorities of each of the Member States in which the authorization is sought, one of which is selected by the applicant as the Reference Member State
(RMS). The competent authority of the RMS prepares a draft assessment report, a draft summary of the drug characteristics (SmPC), and a draft of the labeling and package leaflet,
which are sent to the other Member States (referred to as the Concerned Member States) for their approval. If the Concerned Member States raise no objections, based on a potential
serious risk to public health, to the assessment, SPC, labeling, or packaging proposed by the RMS, the drug is subsequently granted a national marketing authorization in all the
Member States (i.e., in the RMS and the Concerned Member States).

Under the above described procedures, before granting the marketing authorizations, the EMA or the competent authorities of the Member States of the EU make an

assessment of the risk-benefit balance of the drug on the basis of scientific criteria concerning its quality, safety, and efficacy.

Now that the U.K. has left the EU, GB will no longer be covered by centralized marketing authorizations (under the Northern Irish Protocol, centralized EU authorizations will

continue to be recognized in Northern Ireland). All medicinal products with a current centralized authorization were automatically converted to GB marketing authorizations on
January 1, 2021. For a period of two years from January 1, 2021, the MHRA may rely on a decision taken by the EC on the approval of a new marketing authorization in the
centralized procedure, in order to more quickly grant a new GB marketing authorization. A separate application will, however, still be required. The MHRA also has the power to
have regard to marketing authorizations approved in EU Member States through decentralized or mutual recognition procedures with a view to more quickly granting a marketing
authorization in the U.K. or GB.

European Chemical Entity Exclusivity

In the EU, innovative medicinal products, qualify for eight years of data exclusivity upon marketing authorization and an additional two years of market exclusivity. If granted,

data exclusivity prevents generic or biosimilar applicants from referencing

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the innovator's preclinical and clinical trial data contained in the dossier of the reference product when applying for a generic or biosimilar marketing authorization in the EU, during
a period of eight years from the date of which the reference product was first authorized in the EU. During the additional two-year period of market exclusivity, a generic or
biosimilar marketing authorization can be submitted, and the innovator's data may be referenced, but no generic or biosimilar product can be marketed until the expiration of the
market exclusivity. The overall ten-year period will be extended to a maximum of eleven years if, during the first eight years of those ten years, the marketing authorization holder
obtains an authorization for one or more new therapeutic indications which, during the scientific evaluation prior to their authorization, are held to bring a significant clinical benefit
in comparison with existing therapies. There is no guarantee that a product will be considered by the EMA to be an innovative medicinal product, and products may not qualify for
data exclusivity. Even if a compound is considered to be a new chemical entity so that the innovator gains the prescribed period of data exclusivity, another company may market
another version of the product if such company obtained marketing authorization based on an MAA with a complete independent data package of pharmaceutical tests, preclinical
tests and clinical trials.

Brexit and the Regulatory Framework in the U.K.

On June 23, 2016, the electorate in the U.K. voted in favor of leaving the EU (commonly referred to as Brexit). Thereafter, on March 29, 2017, the country formally notified
the EU of its intention to withdraw pursuant to Article 50 of the Lisbon Treaty. The U.K. formally left the EU on January 31, 2020. There was a transition period during which EU
pharmaceutical laws continued to apply to the UK, which expired on December 31, 2020. However, the EU and the U.K. have concluded a trade and cooperation agreement (the
TCA), which was provisionally applicable since January 1, 2021 and has been formally applicable since May 1, 2021. The TCA includes specific provisions concerning
pharmaceuticals, which include the mutual recognition of GMP, inspections of manufacturing facilities for medicinal products and GMP documents issued, but does not foresee
wholesale mutual recognition of U.K. and EU pharmaceutical regulations. At present, GB has implemented EU legislation on the marketing, promotion and sale of medicinal
products through the Human Medicines Regulations 2012 (as amended) (under the Northern Ireland Protocol, the EU regulatory framework will continue to apply in Northern
Ireland). The regulatory regime in GB therefore currently aligns with EU regulations, however it is possible that these regimes will diverge in future now that GB’s regulatory system
is independent from the EU and the TCA does not provide for mutual recognition of U.K. and EU pharmaceutical legislation.

Furthermore, the Data Protection Act 2018 in the United Kingdom “implements” and complements the EU’s the General Data Protection Regulation (EU) 2016/679 (GDPR),
and is effective in the United Kingdom. On June 28, 2021, the EC adopted an adequacy decision in respect of transfers of personal data to the U.K. for a four-year period (until June
27, 2025). Similarly, the U.K. has determined that it considers all of the EU Member States to be adequate for the purposes of data protection. This ensures that data flows between
the U.K. and the EU remain unaffected. The aforementioned EU rules are generally applicable in the European Economic Area (EEA) which consists of the EU Member States, plus
Norway, Liechtenstein and Iceland.

Rest of the World Regulation

For other countries outside of Europe and the U.S., such as countries in Eastern Europe, Latin America, or Asia, the requirements governing the conduct of clinical trials, drug

licensing, pricing, and reimbursement vary from country to country. In all cases the clinical trials must be conducted in accordance with GCP requirements and the applicable
regulatory requirements and the ethical principles that have their origin in the Declaration of Helsinki, which is a statement of ethical principles for medical research involving
human subjects, including research on identifiable human material and data, developed by the World Medical Association.

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.

Coverage and Reimbursement

Sales of QINLOCK and any future approved drugs will depend, in part, on the extent to which such drugs will be covered by third-party payors, such as government health

programs, commercial insurers, and managed healthcare organizations, as well as the level of reimbursement such third-party payors provide for our products. Patients and providers
are unlikely to use QINLOCK or any future approved drugs unless coverage is provided and reimbursement is adequate to cover a significant portion of the cost of such drugs. These
third-party payors are increasingly reducing reimbursements for medical drugs and services.

In the U.S., no uniform policy of coverage and reimbursement for drugs or biological products exists, and one payor's determination to provide coverage and adequate

reimbursement for a product does not assure that other payors will make a similar

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determination. In the U.S., the principal decisions about reimbursement for new medicines are typically made by the CMS, an agency within the HHS, as the CMS decides whether
and to what extent a new medicine will be covered and reimbursed under Medicare. Private third-party payors tend to follow Medicare coverage and reimbursement limitations to a
substantial degree, but also have their own methods and approval process apart from Medicare determinations. Accordingly, decisions regarding the extent of coverage and amount
of reimbursement to be provided for QINLOCK or any of our drug candidates, if approved, are made on a payor-by-payor basis. As a result, the coverage determination process may
be a time-consuming and costly process that will require us to provide scientific and clinical support for the use of QINLOCK or any future approved drugs to each payor separately,
with no assurance that coverage and adequate reimbursement will be obtained. Even if we obtain coverage for a given product, the resulting reimbursement payment rates might not
be adequate for us to achieve or sustain profitability or may require co-payments that patients find unacceptably high. Further, due to the COVID-19 pandemic, millions of
individuals have lost or will be losing employer-based insurance coverage, which may adversely affect our ability to commercialize our products.

Additionally, the containment of healthcare costs has become a priority of federal and state governments, and the prices of drugs have been a focus in this effort. The U.S.

government, state legislatures, and foreign governments have shown significant interest in implementing cost-containment programs, including price controls, restrictions on
reimbursement, and requirements for substitution of generic drugs. Adoption of price controls and cost-containment measures, and adoption of more restrictive policies in
jurisdictions with existing controls and measures, could further limit our net revenue and results. Decreases in third-party reimbursement for QINLOCK or any of our drug
candidates, if approved, or a decision by a third-party payor to not cover QINLOCK or any of our drug candidates could reduce physician usage of such drugs and have a material
adverse effect on our sales, results of operations and financial condition.

The Medicaid Drug Rebate Program (MDRP) requires pharmaceutical manufacturers to enter into and have in effect a national rebate agreement with the Secretary of the HHS

as a condition for states to receive federal matching funds for the manufacturer's outpatient drugs furnished to Medicaid patients. The ACA made several changes to the MDRP,
including increasing pharmaceutical manufacturers' rebate liability by raising the minimum basic Medicaid rebate percentage on most branded prescription drugs of average
manufacturer price (AMP) and adding a new rebate calculation for "line extensions" (i.e., new formulations, such as extended release formulations) of solid oral dosage forms of
branded products, creating a new methodology by which rebates owed are calculated for drugs that are inhaled, infused, instilled, implanted, or injected, as well as potentially
impacting their rebate liability by modifying the statutory definition of AMP. The ACA also expanded the universe of Medicaid utilization subject to drug rebates by requiring
pharmaceutical manufacturers to pay rebates on Medicaid managed care utilization and by enlarging the population potentially eligible for Medicaid drug benefits. Pricing and rebate
programs must also comply with the Medicaid rebate requirements of the U.S. Omnibus Budget Reconciliation Act of 1990.

The Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA) established the Medicare Part D (Part D) program to provide a voluntary prescription

drug benefit to Medicare beneficiaries. Under Part D, Medicare beneficiaries may enroll in prescription drug plans offered by private entities that provide coverage of outpatient
prescription drugs. Unlike Medicare Parts A and B, Part D coverage is not standardized. While all Medicare drug plans must give at least a standard level of coverage set by
Medicare, Part D prescription drug plan sponsors are not required to pay for all covered Part D drugs, and each drug plan can develop its own drug formulary that identifies which
drugs it will cover and at what tier or level. These Part D prescription drug formularies must include drugs within each therapeutic category and class of covered Part D drugs, though
not necessarily all the drugs in each category or class. Any formulary used by a Part D prescription drug plan must be developed and reviewed by a pharmacy and therapeutic
committee. Government payment for some of the costs of prescription drugs may increase demand for QINLOCK or any drug candidates for which we may obtain marketing
approval. However, any negotiated prices for QINLOCK or any future drugs covered by a Part D prescription drug plan will likely be lower than the prices we might otherwise
obtain. Moreover, while the MMA applies only to drug benefits for Medicare beneficiaries, private payors often follow Medicare coverage policy and payment limitations in setting
their own payment rates. Any reduction in payment that results from the MMA may result in a similar reduction in payments from non-governmental payors.

For a drug product to receive federal reimbursement under the Medicaid or Medicare Part B (Part B) programs or to be sold directly to U.S. government agencies, the
manufacturer must extend discounts to entities eligible to participate in the 340B drug pricing program. The required 340B discount on a given product is calculated based on the
AMP and Medicaid rebate amounts reported by the manufacturer. As of 2010, the ACA expanded the types of entities eligible to receive discounted 340B pricing, although, under
the current state of the law, with the exception of children's hospitals, these newly eligible entities will not be eligible to receive discounted 340B pricing on orphan drugs. In
addition, as 340B drug pricing is determined based on AMP and Medicaid rebate data, the revisions to the Medicaid rebate formula and AMP definition described above could cause
the required 340B discount to increase. In addition, legislation may be introduced that, if passed, would further expand the Public Health Service's 340B Drug Pricing Program (the
340B program) to additional covered entities or would require participating manufacturers to agree to provide 340B discounted pricing on drugs used in an inpatient setting.

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The American Recovery and Reinvestment Act of 2009 provides funding for the federal government to compare the effectiveness of different treatments for the same illness.

The plan for the research was published in 2012 by the HHS, the Agency for Healthcare Research and Quality and the National Institutes for Health, and periodic reports on the
status of the research and related expenditures are made to Congress. Although the results of the comparative effectiveness studies are not intended to mandate coverage policies for
public or private payors, it is not clear what effect, if any, the research will have on the sales of QINLOCK or any of our drug candidates for which we may obtain marketing
approval, if any such drug or the condition that they are intended to treat are the subject of a trial. It is also possible that comparative effectiveness research demonstrating benefits in
a competitor's drug could adversely affect the sales of QINLOCK or any of our drug candidates for which we may obtain marketing approval. If third-party payors do not consider
QINLOCK or any future drugs to be cost-effective compared to other available therapies, they may not cover such drugs as a benefit under their plans or, if they do, the level of
payment may not be sufficient to allow us to sell such drugs on a profitable basis.

In recent years, additional laws have resulted in direct or indirect reimbursement reductions for certain Medicare providers, including:

•

•

The Budget Control Act of 2011 (BCA), among other things, created measures for spending reductions by Congress. A Joint Select Committee on Deficit Reduction,
tasked with recommending a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, was unable to reach required goals, thereby triggering the
legislation's automatic reduction to several government programs. These changes included aggregate reductions to Medicare payments to providers of up to 2% per fiscal
year. These reductions went into effect on April 1, 2013 and, due to subsequent legislative amendments to the statute, will remain in effect through 2030, with the
exception of a temporary suspension from May 1, 2020 through March 31, 2022 due to the COVID-19 pandemic. Following the temporary suspension, a 1% payment
reduction will occur beginning April 1, 2022 through June 30, 2022, and the 2% payment reduction will resume on July 1, 2022.

The American Taxpayer Relief Act of 2012 (ATRA), among other things, reduced Medicare payments to several providers, and increased the statute of limitations period
for the government to recover overpayments to providers from three to five years.

These laws, and future state and federal healthcare reform measures may be adopted in the future, any of which may result in additional reductions in Medicare and other

healthcare funding and otherwise affect the prices we may obtain for QINLOCK or any drug candidates for which we may obtain regulatory approval or the frequency with which
QINLOCK or any such drug candidate is prescribed or used.

As noted above, the marketability of QINLOCK or any drug candidates for which we receive regulatory approval for commercial sale may suffer if the government and other

third-party payors fail to provide adequate coverage and reimbursement. We expect that an increasing emphasis on cost containment measures in the U.S. 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 some foreign countries, the proposed pricing for a drug must be approved before it may be lawfully marketed. The requirements governing drug pricing vary
widely from country to country. For example, the EU provides options for its Member States to restrict the range of medicinal drugs for which their national health insurance systems
provide reimbursement and to control the prices of medicinal drugs for human use. A Member State may approve a specific price for the medicinal drug or it may instead adopt a
system of direct or indirect controls on the profitability of the company placing the medicinal drug on the market. There can be no assurance that any country that has price controls
or reimbursement limitations for pharmaceutical drugs will allow favorable reimbursement and pricing arrangements for QINLOCK or any of our future drugs. Historically, drugs
launched in the EU do not follow price structures of the U.S. and generally tend to be significantly lower.

U.S. Healthcare Reform

The ACA has had a significant impact on the healthcare industry. The ACA expanded coverage for the uninsured while at the same time containing overall healthcare costs.
With regard to pharmaceutical products, the ACA, among other things, addressed a new methodology by which rebates owed by manufacturers under the MDRP are calculated for
drugs that are inhaled, infused, instilled, implanted, or injected, increased the minimum Medicaid rebates owed by manufacturers under the MDRP, extended the rebate program to
individuals enrolled in Medicaid managed care organizations, and established annual fees and taxes on manufacturers of certain branded prescription drugs, and a new Medicare
Part D coverage gap discount program, in which manufacturers must agree to offer 70% (increased pursuant to the Bipartisan Budget Act of 2018, effective as of 2019

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(BBA) point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer's
outpatient drugs to be covered under Medicare Part D.

The ACA requires pharmaceutical manufacturers of branded prescription drugs to pay a branded prescription drug fee to the federal government. Each such manufacturer is

required to pay a prorated share of the branded prescription drug fee based on the dollar value of its branded prescription drug sales to certain federal programs identified in the law.
The ACA also expanded the 340B program to include additional types of covered entities. Federal law requires that any company that participates in the Medicaid rebate program
also participate in the 340B program in order for federal funds to be available for the manufacturer's drugs under Medicaid. The 340B program requires participating manufacturers
to agree to charge statutorily defined covered entities no more than the 340B "ceiling price" for the manufacturer's covered outpatient drugs. In addition, in order to be eligible to
have its products paid for with federal funds under the Medicaid programs and purchased by certain federal grantees and agencies, a manufacturer also must participate in the
Department of Veterans Affairs Federal Supply Schedule (FSS) pricing program, established by Section 603 of the Veterans Health Care Act of 1992. Under this program, the
manufacturer is obligated to make products available for procurement on an FSS contract and charge a price to four federal agencies—the Department of Veterans Affairs, the
Department of Defense, the Public Health Service, and the Coast Guard—that is at least 24% less than the Non-Federal Average Manufacturing Price (non-FAMP) for the prior fiscal
year.

Some of the provisions of the ACA have yet to be fully implemented, while certain provisions have been subject to reform through legislation and Executive Orders of the
previous President of the U.S. (the previous U.S. President), and to judicial challenges. The U.S. Supreme Court has upheld certain key aspects of the legislation, including a tax-
based shared responsibility payment imposed on certain individuals who fail to maintain qualifying health coverage for all or part of a year, which is commonly the requirement that
all individuals maintain health insurance coverage or pay a penalty, referred to as the "individual mandate." However, the Tax Cuts and Jobs Act of 2017 (2017 Tax Reform Act)
included a provision repealing the individual mandate, effective January 1, 2019. 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 2017 Tax Reform Act, the
remaining provisions of the ACA are invalid as well. On December 18, 2019, the Fifth Circuit U.S. Court of Appeals held that the individual mandate is unconstitutional, and
remanded the case to the lower court to reconsider its earlier invalidation of the full ACA. Pending review, the ACA remains in effect, but it is unclear at this time what effect the
latest ruling will have on the status of the ACA. The current U.S. presidential administration has indicated that enhancing the ACA is a legislative priority. We continue to evaluate
legislative efforts regarding the ACA and its possible impact on our business.

The previous U.S. presidential administration signed two Executive Orders designed to delay the implementation of certain provisions of the ACA or otherwise circumvent
some of the requirements for health insurance mandated by the ACA. On January 20, 2017, the previous U.S. 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 burden
on states or a cost, fee, tax, penalty, or regulatory burden on individuals, healthcare providers, health insurers, or manufacturers of pharmaceuticals or medical devices. On
October 13, 2017, the previous U.S. President signed an Executive Order terminating the cost-sharing subsidies that reimburse insurers under the ACA. The previous U.S.
presidential administration concluded that cost-sharing reduction (CSR) payments to insurance companies required under the ACA had not received necessary appropriations from
Congress and discontinued these payments due to the lack of appropriations. The loss of the CSR payments is expected to increase premiums on certain policies issued by qualified
health plans under the ACA. Several state Attorneys General filed suit to stop the administration from terminating the subsidies, but their request for a restraining order was denied
by a federal judge in California on October 25, 2017. Further, on June 14, 2018, U.S. Court of Appeals for the Federal Circuit ruled that the federal government was not required to
pay more than $12 billion in ACA risk corridor payments to third-party payors who argued were owed to them. In April 2020, the U.S. Supreme Court issued an opinion in Moda
Health Plan, Inc. v. United States which held that the ACA requires the federal government to compensate insurers for significant losses their health plans incurred during the first
three years of the ACA's marketplaces, and that insurers can sue for nonpayment in the Court of Federal Claims. The effects of this decision on third-party payors, the viability of the
ACA marketplace, providers, and potentially our business, are not yet known.

On January 22, 2018, the previous U.S. President signed a continuing resolution on appropriations for fiscal year 2018 that delayed the implementation of certain ACA-
mandated fees, including the so-called "Cadillac" tax on certain high cost employer-sponsored insurance plans, the annual fee imposed on certain health insurance providers based on
market share, and the medical device excise tax on non-exempt medical devices. However, on December 20, 2019, the previous U.S. President signed into law the Further
Consolidated Appropriations Act (H.R. 1865), which repeals the Cadillac tax, the health insurance provider tax, and the medical device excise tax. The BBA among other things,
amends the ACA, effective January 1, 2019, to close the coverage gap in most Medicare drug plans, commonly referred to as the "donut hole."

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In December 2018, the CMS published a final rule permitting further collections and payments to and from certain ACA qualified health plans and health insurance issuers

under the ACA risk adjustment program in response to the outcome of federal district court litigation regarding the method CMS uses to determine this risk adjustment. In addition,
CMS has recently published a final rule that would give states greater flexibility starting in 2020, in setting benchmarks for insurers in the individual and small group marketplaces,
which may have the effect of relaxing the essential health benefits required under the ACA for plans sold through such marketplaces.

Other legislative changes have also been proposed and adopted since the ACA was enacted that, directly or indirectly, affect or are likely to affect, the pharmaceutical industry

and the commercialization of our products, including the BCA, the ATRA, and the Middle Class Tax Relief and Job Creation Act of 2012. In August 2011, the BCA, among other
things, created measures for spending reductions by Congress. A Joint Select Committee on Deficit Reduction, tasked with recommending a targeted deficit reduction of at least $1.2
trillion for the years 2013 through 2021, was unable to reach required goals, thereby triggering the legislation's automatic reduction to several government programs. This includes
aggregate reductions of Medicare payments to providers up to 2% per fiscal year, and, due to subsequent legislative amendments, will remain in effect through 2030 unless additional
Congressional action is taken. However, the Medicare sequester reductions under the BCA were temporarily suspended from May 1, 2020 through March 31, 2022 due to the
COVID-19 pandemic. Following the temporary suspension, a 1% payment reduction will occur beginning April 1, 2022 through June 30, 2022, and the 2% payment reduction will
resume on July 1, 2022. The ATRA among other things, reduced Medicare payments to several providers, including hospitals, imaging centers and cancer treatment centers, and
increased the statute of limitations period for the government to recover overpayments to providers from three to five years.

We expect that the ACA, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional
downward pressure on the price that we receive for our products that obtain marketing approval. Any reduction in reimbursement from Medicare or other government programs may
result in a similar reduction in payments from private payors. The implementation of cost-containment measures or other healthcare reforms may prevent us from being able to
generate revenue, attain profitability, or commercialize our products.

Additionally, there has been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products, which have resulted in several

recent Congressional inquiries and proposed bills designed to, among other things, bring more transparency to drug pricing, review the relationship between pricing and
manufacturer patient programs, and reform government program reimbursement methodologies for drugs. In addition, the U.S. government, state legislatures, and foreign
governments have shown significant interest in implementing cost-containment programs, including price-controls, restrictions on reimbursement, and requirements for substitution
of generic products for branded prescription drugs to limit the growth of government paid healthcare costs. At the federal level, the previous U.S. presidential administration released
a "Blueprint" to lower drug prices and reduce out of pocket costs of drugs that contains additional proposals to increase drug manufacturer competition, increase the negotiating
power of certain federal healthcare programs, incentivize manufacturers to lower the list price of their products, and reduce the out of pocket costs of drug products paid by
consumers. HHS has already started the process of soliciting feedback on some of these measures and, at the same time, is immediately implementing others under its existing
authority. In May 2019, the CMS issued a final rule to allow Medicare Advantage Plans the option of using step therapy, a type of prior authorization, for Part B drugs beginning
January 1, 2020. This final rule codified the CMS's policy change that was effective January 1, 2019. The U.S. Congress and the prior U.S. presidential administration have each
indicated that they would continue to seek new legislative and/or administrative measures to control drug costs. For example, on September 25, 2019, the Senate Finance Committee
introduced the Prescription Drug Pricing Reduction Action of 2019, a bill intended to reduce Medicare and Medicaid prescription drug prices. The proposed legislation would
restructure the Part D benefit, modify payment methodologies for certain drugs, and impose an inflation cap on drug price increases. An even more restrictive bill, the Lower Drug
Costs Now Act of 2019, was introduced in the House of Representatives on September 19, 2019, and would require HHS to directly negotiate drug prices with manufacturers. The
Lower Drugs Costs Now Act of 2019 has passed out of the House and was delivered to the Senate on December 16, 2019. However, it is unclear whether either of these bills will
make it through both chambers and be signed into law, and if either is enacted, what effect it would have on our business.

In the U.S., the MMA contains provisions that call for the promulgation of regulations that expand pharmacists' and wholesalers' ability to import cheaper versions of an

approved drug and competing products from Canada, where there are government price controls. Further, the MMA provides that these changes to U.S. importation laws will not
take effect, unless and until the Secretary of the HHS certifies that the changes will pose no additional risk to the public's health and safety and will result in a significant reduction in
the cost of products to consumers. On September 23, 2020, the Secretary of the HHS made such certification to Congress, and on October 1, 2020, the FDA published a final rule
that allows for the importation of certain prescription drugs from Canada. Under the final rule, States and Indian Tribes, and in certain future circumstances pharmacists and
wholesalers, may submit importation program proposals to the FDA for review and authorization. On September 25, 2020, the CMS stated drugs imported by States under this rule
will not be eligible for federal rebates under Section 1927 of the Social

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Security Act and manufacturers would not report these drugs for "best price" or Average Manufacturer Price purposes. Since these drugs are not considered covered outpatient drugs,
the CMS further stated it will not publish a National Average Drug Acquisition Cost for these drugs. Separately, the FDA also issued a final guidance document outlining a pathway
for manufacturers to obtain an additional National Drug Code for an FDA-approved drug that was originally intended to be marketed in a foreign country and that was authorized for
sale in that foreign country. The market implications of the final rule and guidance are unknown at this time. Proponents of drug reimportation may attempt to pass legislation that
would directly allow reimportation under certain circumstances. Legislation or regulations allowing the reimportation of drugs, if enacted, could decrease the price we receive for any
products that we may develop and adversely affect our future revenues and prospects for profitability.

Individual states in the U.S. have also become increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical 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.

Other Healthcare Laws

For our drug and any drug candidates that obtain regulatory approval and are marketed in the U.S., our arrangements with third-party payors, customers, and other third parties

may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and relationships through
which we market, sell, and distribute QINLOCK or any products for which we obtain marketing approval. In addition, we may be subject to health information privacy and security
regulation by U.S. federal and state governments and foreign jurisdictions in which we conduct our business. In the U.S., these laws include, without limitation, state and federal anti-
kickback, false claims, physician transparency, and patient data privacy and security laws and regulations, including but not limited to those described below:

•

•

The federal Anti-Kickback Statute makes it illegal for any person, including a prescription drug manufacturer (or a party on its behalf) to, knowingly and willfully offer,
solicit, receive, or pay remuneration (including any kickback, bribe, or rebate), directly or indirectly, in cash or in kind, that is intended to induce or reward, or in return
for, either the referral of an individual for, or the purchase, order, or recommendation of, any good or service, for which payment may be made, in whole or in part, under
federal healthcare programs such as the Medicare and Medicaid programs. Violations of this law are subject to civil and criminal fines and penalties for each violation,
plus up to three times the remuneration involved, imprisonment, administrative civil monetary penalties, and exclusion from participation in government healthcare
programs. In addition, a person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation. In
addition, the government may assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or
fraudulent claim for purposes of the False Claims Act (FCA). The Anti-Kickback Statute has been interpreted to apply to arrangements between pharmaceutical
manufacturers, on the one hand, and prescribers, purchasers, and formulary managers, on the other. Although there are a number of statutory exceptions and regulatory
safe harbors protecting some common activities from prosecution, the exceptions and safe harbors are drawn narrowly. Practices that involve remuneration that may be
alleged to be intended to induce prescribing, purchases, or recommendations may be subject to scrutiny if they do not qualify for an exception or safe harbor. Failure to
meet all of the requirements of a particular applicable statutory exception or regulatory safe harbor does not make the conduct per se illegal under the Anti-Kickback
Statute. Instead, the legality of the arrangement will be evaluated on a case-by-case basis based on a cumulative review of all of its facts and circumstances.

The federal civil and criminal false claims laws, including the federal False Claims Act, impose criminal and civil penalties, and authorizes civil whistleblower or qui tam
actions, against individuals or entities (including manufacturers) for, among other things, knowingly presenting, or causing to be presented false or fraudulent claims for
payment by a federal healthcare program; making, using, or causing to be made or used, a false statement or record material to payment of a false or fraudulent claim or
obligation to pay or transmit money or property to the federal government; or knowingly concealing or knowingly and improperly avoiding or decreasing an obligation to
pay money to the federal government. The government may deem manufacturers to have "caused" the submission of false or fraudulent claims by, for example, providing
inaccurate billing or coding information to customers or promoting a product off-label. Claims which include items or services resulting from a violation of the federal
Anti-Kickback Statute are false or fraudulent claims for purposes of the False Claims Act. Our marketing and activities relating to the reporting of wholesaler or estimated
retail prices for QINLOCK or any future products, the reporting of prices used to calculate Medicaid rebate information, and other information affecting federal, state, and
third-party reimbursement for QINLOCK or any future products, and the sale and marketing of QINLOCK and any future product candidates, are subject to scrutiny
under this law.

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•

•

The anti-inducement law, which prohibits, among other things, the offering or giving of remuneration, which includes, without limitation, any transfer of items or services
for free or for less than fair market value (with limited exceptions), to a Medicare or Medicaid beneficiary that the person knows or should know is likely to influence the
beneficiary's selection of a particular supplier of items or services reimbursable by a federal or state governmental program.

The federal Health Insurance Portability and Accountability Act of 1996 (HIPAA) which imposes criminal and civil liability for knowingly and willfully executing, or
attempting to execute, a scheme to defraud any healthcare benefit program, or obtain, by means of false or fraudulent pretenses, representations, or promises, any of the
money or property owned by, or under the custody or control of, any healthcare benefit program, regardless of the payor (e.g., public or private), willfully obstructing a
criminal investigation of a healthcare offense, and knowingly or willfully falsifying, concealing or covering up by any trick or device a material fact, or making any
materially false, fictitious, or fraudulent statement in connection with the delivery of or payment for healthcare benefits, items, or services relating to healthcare matters.
Similar to the U.S. federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the healthcare fraud statute implemented under HIPAA or
specific intent to violate it in order to have committed a violation.

• HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 (HITECH), and their respective implementing regulations,

which impose, among other things, requirements on certain covered healthcare providers, health plans, and healthcare clearinghouses and their business associates, that
perform services for them that involve the use, or disclosure of, individually identifiable health information, relating to the privacy, security, and transmission of
individually identifiable health information without appropriate authorization, including mandatory contractual terms and required implementation of technical safeguards
of such information. HITECH also created new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly applicable to business
associates, and gave state attorneys general new authority to file civil actions for damage or injunctions in federal courts to enforce the federal HIPAA laws and seek
attorneys' fees and costs associated with pursuing federal civil actions.

•

•

•

The federal false statements statute prohibits knowingly and willfully falsifying, concealing, or covering up a material fact or making any materially false statement in
connection with the delivery of or payment for healthcare benefits, items, or services.

Federal price reporting laws require drug manufacturers to calculate and report complex pricing metrics to government programs, where such reported prices may be used
in the calculation of reimbursement and/or discounts on approved products.

The federal Physician Payments Sunshine Act (Sunshine Act), enacted as part of the ACA, and its implementing regulations, require certain manufacturers of drugs,
devices, biologics, and medical supplies for which payment is available under Medicare, Medicaid, or the Children's Health Insurance Program (with certain exceptions)
to report annually to the HHS under the Open Payments Program, information related to payments and other "transfers of value" provided to physicians (defined to
include doctors, dentists, optometrists, podiatrists, and chiropractors) and teaching hospitals, and ownership and investment interests held by physicians and their
immediate family members. Effective January 1, 2022, these reporting obligations will extend to include transfers of value made to certain non-physician providers such
as physician assistants and nurse practitioners. In addition, many states also require the reporting of payments or other transfers of value. Many of these state laws differ
from each other in significant ways, are often not pre-empted, and may have a more prohibitive effect than the Sunshine Act, thus further complicating compliance efforts.

• Analogous state and foreign laws and regulations, such as state anti-kickback, false claims laws, consumer protection, and unfair competition laws, which may apply to

pharmaceutical business practices, including but not limited to, research, distribution, sales, and marketing arrangements as well as submitting claims involving healthcare
items or services reimbursed by any third-party payor, including commercial insurers. Such laws are enforced by various state agencies and through private actions. Some
state laws require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant federal government
compliance guidance that otherwise restricts payments that may be made to healthcare providers and other potential referral sources, require drug manufacturers to report
information related to pricing and marketing information, such as the tracking and reporting of gifts, compensations, and other remuneration and items of value provided
to physicians and other healthcare providers and entities, require the registration of pharmaceutical sales representatives, and restrict marketing practices or require
disclosure of marketing expenditures. State and foreign laws also govern the privacy and security of health information in certain circumstances. Such data privacy and
security laws may differ from one another in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

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In California, the California Consumer Privacy Act (CCPA) was enacted in June 2018, became effective on January 1, 2020, and became subject to enforcement by the
California Attorney General's office on July 1, 2020. The CCPA broadly defines personal information, and creates new individual privacy rights and protections for California
consumers (as defined in the law), places increased privacy and security obligations on entities handling personal data of consumers or households, and provides for civil penalties
for violations and a private right of action for data breaches. The CCPA requires covered companies to provide certain disclosures to consumers about its data collection, use and
sharing practices, and to provide affected California residents with ways to opt-out of certain sales or transfers of personal information. While there is an exception for protected
health information that is subject to HIPAA and clinical trial regulations, the CCPA may impact our business activities if we become a "Business" regulated by the scope of the
CCPA.

In addition to the CCPA, new privacy and data security laws have been proposed in more than half of the states in the U.S. and in the U.S. Congress, reflecting a trend toward
more stringent privacy legislation in the U.S., which trend may accelerate depending on the new U.S. presidential administration. The effects of the CCPA, and other similar state or
federal laws, are potentially significant and may require us to modify our data processing practices and policies and to incur substantial costs and potential liability in an effort to
comply with such legislation.

In the U.S., to help patients afford QINLOCK and any other products, if approved, we have various programs to assist them, including patient assistance programs and co-pay

coupon programs for eligible patients. Government enforcement agencies have shown increased interest in pharmaceutical companies' product and patient assistance programs,
including reimbursement support services, and a number of investigations into these programs have resulted in significant civil and criminal settlements. In addition, at least one
insurer has directed its network pharmacies to no longer accept co-pay coupons for certain specialty drugs the insurer identified. Our co-pay coupon programs could become the
target of similar insurer actions. In November 2013, the CMS issued guidance to the issuers of qualified health plans sold through the ACA marketplaces encouraging such plans to
reject patient cost-sharing support from third parties and indicating that the CMS intends to monitor the provision of such support and may take regulatory action to limit it in the
future. The CMS subsequently issued a rule requiring individual market qualified health plans to accept third-party premium and cost-sharing payments from certain government-
related entities. In September 2014, the Office of Inspector General (OIG) of the HHS issued a Special Advisory Bulletin warning manufacturers that they may be subject to
sanctions under the federal anti-kickback statute and/or civil monetary penalty laws if they do not take appropriate steps to exclude Part D beneficiaries from using co-pay coupons.
Accordingly, companies exclude these Part D beneficiaries from using co-pay coupons.

Third party patient assistance programs that receive financial support from companies have become the subject of enhanced government and regulatory scrutiny. The OIG has

established guidelines that suggest that it is lawful for pharmaceutical manufacturers to make donations to charitable organizations who provide co-pay assistance to Medicare
patients, provided that such organizations, among other things, are bona fide charities, are entirely independent of and not controlled by the manufacturer, provide aid to applicants on
a first-come basis according to consistent financial criteria, and do not link aid to use of a donor's product. However, donations to patient assistance programs have received some
negative publicity and have been the subject of multiple government enforcement actions, related to allegations regarding their use to promote branded pharmaceutical products over
other less costly alternatives. Specifically, in recent years, there have been multiple settlements resulting out of government claims challenging the legality of their patient assistance
programs under a variety of federal and state laws.

The scope and enforcement of each of these laws is uncertain and subject to rapid change in the current environment of healthcare reform, especially in light of the lack of

applicable precedent and regulations. Federal and state enforcement bodies have recently increased their scrutiny of interactions between healthcare companies and healthcare
providers, which has led to a number of investigations, prosecutions, convictions, and settlements in the healthcare industry. In November 2020, the OIG issued a Fraud Alert
highlighting its view that pharmaceutical promotional speaker programs can pose a high risk of fraud and abuse. It is possible that governmental authorities will conclude that our
business practices may not comply with current or future statutes, regulations, or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our
operations are found to be in violation of any of these laws or any other related governmental regulations that may apply to us, we may be subject to significant civil, criminal, and
administrative penalties, damages, fines, individual imprisonment, disgorgement, exclusion of drugs from government funded healthcare programs, such as Medicare and Medicaid,
contractual damages, reputational harm, diminished profits and future earnings, and the curtailment or restructuring of our operations, as well as additional oversight, and reporting
obligations if we become subject to a corporate integrity agreement or similar settlement to resolve allegations of non-compliance with these laws. If any of the physicians or other
healthcare providers or entities with whom we expect to do business is found to be not in compliance with applicable laws, they may be subject to criminal, civil, or administrative
sanctions, including exclusions from government funded healthcare programs, which may also adversely affect our business. Ensuring business arrangements comply with applicable
healthcare laws, as well as responding to possible investigations by government authorities, can be time- and resource-consuming and can divert a company's attention from the
business.

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European Data Collection

Internationally, virtually every jurisdiction in which we conduct trials or otherwise operate has established its own data security and privacy legal framework with which we or

our customers must comply. In the EU, we face particular privacy, data security, and data protection risks in connection with requirements of the GDPR, and other data protection
regulations. The GDPR applies to any company established in the EU as well as to those outside the EU if they collect and use personal data in connection with the offering of goods
or services to individuals in the EU or the monitoring of their behavior. The GDPR has enhanced data protection obligations for controllers of personal data, including, for example,
expanded disclosures about how personal information is to be used, limitations on retention of information, mandatory data breach notification requirements, restrictions on transfers
outside of the EU to third countries deemed to lack adequate privacy protections (such as the U.S.), and has created onerous new obligations and liabilities on services providers or
data processors. In addition, the GDPR imposed heightened obligations for sensitive data including information revealing health or medical information. These obligations could
greatly increase our cost of conducting our business or even prevent us from offering certain services in jurisdictions in which we may operate. Non-compliance with the GDPR may
result in monetary penalties of up to €20 million or 4% of worldwide revenue, whichever is higher. Moreover, data subjects can claim damages resulting from infringement of the
GPDR. The GDPR further grants non-profit organizations the right to bring claims on behalf of data subjects. The GDPR may increase our responsibility and liability in relation to
personal data that we process where such processing is subject to the GDPR, and we may be required to put in place additional mechanisms to ensure compliance with the GDPR,
including as implemented by individual countries. Compliance with the GDPR is a continuous, rigorous and time-intensive process that may increase our cost of doing business or
require us to change our business practices, and despite those efforts, there is a risk that we may be subject to fines and penalties, litigation, and reputational harm in connection with
our European activities. In addition, further to the U.K.'s exit from the EU on January 31, 2020, the GDPR ceased to apply in the U.K. at the end of the transition period on
December 31, 2020. However, as of January 1, 2021, the U.K.’s European Union (Withdrawal) Act 2018 incorporated the U.K. GDPR into U.K. law. The U.K. GDPR and the U.K.
Data Protection Act 2018 set out the U.K.'s data protection regime, which is independent from but aligned to the EU's data protection regime. Non-compliance with the U.K. GDPR
may result in monetary penalties of up to £17.5 million or 4% of worldwide revenue, whichever is higher. In addition, on June 28, 2021, the EC adopted an adequacy decision in
respect of transfers of personal data to the U.K. for a four-year period (until June 27, 2025). Similarly, the U.K. has determined that it considers all of the EEA to be adequate for the
purposes of data protection. This ensures that data flows between the U.K. and the EEA remain unaffected.

Human Capital Resources

As of January 31, 2022, we had approximately 280 employees located in approximately 25 states across the United States and four countries in Europe. More than 150
employees are located at our headquarters in Waltham, Massachusetts, approximately 35 employees are located at our research facility in Lawrence, Kansas, and approximately 10
employees are located in our European commercial headquarters in Zug, Switzerland. Our employee headcounts listed above assume full completion of our corporate restructuring
announced in November 2021.

We believe that our future success largely depends upon our continued ability to attract, retain and engage highly skilled employees. We emphasize a number of measures and

objectives in managing our human capital assets, including, among others, employee engagement, development, and training, talent acquisition and retention, employee safety and
wellness, diversity and inclusion, and compensation and pay equity. We provide our employees with competitive salaries and bonuses, opportunities for equity ownership,
development programs that enable continued learning and growth and a robust rewards package that promotes well-being across all aspects of their lives, including health care,
retirement planning and paid time off. In addition, we regularly conduct employee surveys to gauge employee engagement and identify areas of focus.

We are committed to continuously building a culture that embraces the uniqueness of our people and finds strength in our differences. We recognize our duty to cultivate
diversity within the organization and to ensure that every voice is heard. We understand that varied perspectives lead to the best ideas and outcomes. By creating a workplace where
every individual can feel welcome and valued, we will better meet the needs of those we serve. In 2021, we formed a cross-functional Diversity, Equity, and Inclusion (DEI) task
force of employee volunteers. The task force meets regularly and conducted a gap analysis in 2021. The result of this analysis informed the development of a DEI roadmap with the
goal of realizing our vision in 2022 and beyond. Our guiding principles of patient-focus, accountability, transparency, honesty and integrity, and stewardship, serve as our cultural
pillars. Grounded in these guiding principles, we focus our company-wide efforts on creating a collaborative environment where our colleagues feel respected, valued, and can
contribute to their fullest potential.

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Corporate Information

Deciphera Pharmaceuticals, Inc. is a Delaware corporation that was formed in August 2017. Deciphera Pharmaceuticals, LLC, one of our wholly owned subsidiaries, is a
Delaware limited liability company that was formed in 2003 as our initial company entity. Our principal executive offices are located at 200 Smith Street, Waltham, MA 02451, and
our telephone number is (781) 209-6400.

Available Information

Our Internet address is www.deciphera.com. Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, including exhibits, proxy,
and information statements and amendments to those reports filed or furnished pursuant to Sections 13(a), 14, and 15(d) of the Securities Exchange Act of 1934, as amended (the
Exchange Act), are available through the "Investors" portion of our website free of charge as soon as reasonably practicable after we electronically file such material with, or furnish
it to, the SEC. Information on our website is not part of this Form 10-K or any of our other securities filings unless specifically incorporated herein by reference. In addition, our
filings with the SEC may be accessed through the SEC's Interactive Data Electronic Applications system at www.sec.gov. All statements made in any of our securities filings,
including all forward-looking statements or information, are made as of the date of the document in which the statement is included, and we do not assume or undertake any
obligation to update any of those statements or documents unless we are required to do so by law.

ITEM 1A.    RISK FACTORS

Our business is subject to numerous material and other risks. You should carefully consider the risks and uncertainties described below together with all of the other
information contained in this Form 10-K including our consolidated financial statements and the related notes, and in our other filings with the SEC. If any of the following risks
actually occur, our business, prospects, operating results, and financial condition could suffer materially. In such event, the trading price of our common stock could decline and you
might lose all or part of your investment.

Risks Related to Our Business and Commercialization

Risks Related to Business Development and Commercialization

Our corporate strategy and restructuring plan may not be successful.

In November 2021, we announced a corporate restructuring to prioritize clinical development programs and streamline commercial operations. We are prioritizing the clinical
development of our vimseltinib and DCC-3116 programs and continuing with a focused investment in our next generation of research programs, designed to provide first-in-class or
best-in-class treatments for patients. There is no guarantee that the corporate restructuring plan will achieve its intended benefits or that our post-restructuring focus will be sufficient
for us to achieve success. For example, our corporate restructuring may not result in anticipated savings or other economic benefits, could result in total costs and expenses that are
greater than expected, could make it more difficult to attract and retain qualified personnel and may disrupt our operations, each of which could have a material adverse effect on our
business.

Our business depends heavily on our ability to successfully commercialize QINLOCK in the U.S., key European markets, and in other jurisdictions where we may obtain
marketing approval. There is no assurance that our commercialization efforts with respect to QINLOCK including, without limitation, our launch of QINLOCK in Germany,
will be successful or that we will be able to generate revenues at the levels or on the timing we expect, or at levels or on the timing necessary to support our goals.

To date, we have not generated sufficient revenue to result in a profit from the sale of products. On May 15, 2020, QINLOCK was approved in the U.S. by the FDA for the

treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib. Our business currently depends heavily
on our ability to successfully commercialize QINLOCK as a treatment for GIST in the U.S., key European markets, and in other jurisdictions where we may obtain marketing
approval. In November 2021, we announced that the EC approved QINLOCK in the EU for the treatment of adult patients with advanced GIST who have received prior treatment
with three or more kinase inhibitors, including imatinib. In January 2022, we launched QINLOCK in Germany, representing our first European launch of QINLOCK, and are in the
process of transitioning to a post-approval paid early access program in France. Following the corporate restructuring announced in November 2021, we will maintain a limited direct
commercial presence that will support the launch of QINLOCK in two key markets, Germany and France, and plan to provide access to QINLOCK in additional European countries
through

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other channels. This process is conducted on a country-by-country basis and is time-consuming and complex, and we may not be successful in obtaining reimbursements and other
approvals in a timely manner with acceptable terms, or at all. Furthermore, we may never be able to successfully commercialize our product or meet our expectations with respect to
revenues. We have never marketed, sold, or distributed for commercial use any pharmaceutical product other than QINLOCK in fourth-line GIST and have a limited history of
commercial sales. There is no guarantee that the infrastructure, systems, processes, policies, relationships, and materials we have built for the commercialization of QINLOCK in the
U.S. in GIST, or those for the commercialization of QINLOCK in key European markets in GIST, will be sufficient for us to achieve success at the levels we expect. Furthermore,
there is no guarantee that we will be able to expand patient access to QINLOCK in other European countries through any channels that we may pursue.

Our dependence on QINLOCK sales in fourth-line GIST in major geographies is even more important in light of the fact that our Phase 3 INTRIGUE study in second-line

GIST did not meet its primary endpoint and we have determined to discontinue further clinical development of QINLOCK.

We may encounter issues and challenges in commercializing QINLOCK and generating sufficient revenues to result in a profit. We may also encounter challenges related to
reimbursement of QINLOCK, including potential limitations in the scope, breadth, availability, or amount of reimbursement covering QINLOCK. Similarly, healthcare settings or
patients may determine that the financial burdens of treatment are not acceptable. We may face other limitations or issues related to the price of QINLOCK. Our results may also be
negatively impacted if we have not adequately sized our field teams or our physician segmentation and targeting strategy is inadequate or if we encounter deficiencies or
inefficiencies in our infrastructure or processes, all of which risks are heightened following the reduction in the size of our U.S. commercial team in connection with the corporate
restructuring described above. Other factors that may hinder our ability to successfully commercialize QINLOCK, or any of our future approved drugs, and generate sufficient
revenues to result in a profit, include:

•

•

•

•

•

•

•

•

•

the acceptance of QINLOCK by patients and the medical community;

the ability of our third-party manufacturer(s) to manufacture commercial supplies of QINLOCK at acceptable costs, to remain in good standing with regulatory agencies,
and to maintain commercially viable manufacturing processes that are, to the extent required, compliant with cGMP regulations;

our ability to remain compliant with laws and regulations that apply to us and our commercial activities;

FDA- or EMA-mandated package insert requirements and successful completion of any related FDA or EMA post-marketing requirements;

the actual market size for QINLOCK, which may be different than expected;

the length of time that patients who are prescribed our drug remain on treatment;

the sufficiency of our drug supply to meet commercial and clinical demands which could be negatively impacted if our projections regarding the potential number of
patients are inaccurate, we are subject to unanticipated regulatory requirements, or our current drug supply is destroyed, or negatively impacted at our manufacturing sites,
storage sites, or in transit;

our ability to effectively compete with other therapies; and

our ability to maintain, enforce, and defend third party challenges to our intellectual property rights in and to QINLOCK.

Any of these issues could impair our ability to successfully commercialize our product or to generate sufficient revenues to result in a profit or profits or to meet our

expectations with respect to the amount or timing of revenues or profits. Any issues or hurdles related to our commercialization efforts may materially adversely affect our business,
results of operations, financial condition, and prospects. There is no guarantee that we will be successful in our commercialization efforts with respect to QINLOCK in fourth-line
GIST. We may also experience significant fluctuations in sales of QINLOCK from period to period and, ultimately, we may never generate sufficient revenues from QINLOCK to
reach or maintain profitability or sustain our anticipated levels of operations. Any inability on our part to successfully commercialize QINLOCK in the U.S., key European markets,
and any other international markets where it may subsequently be approved or any significant delay, could have a material adverse impact on our company.

We have limited experience as a commercial company and the marketing and sale of QINLOCK or any future approved drugs may be unsuccessful or less successful than
anticipated.

While we are commercializing QINLOCK in the U.S. in fourth-line and fourth-line plus GIST, and initiating the launch of QINLOCK in Germany and France, we have limited

experience as a commercial company and there is limited information about

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our ability to successfully overcome many of the risks and uncertainties encountered by companies commercializing drugs in the biopharmaceutical industry. To execute our business
plan, in addition to successfully marketing and selling QINLOCK, we will need to successfully:

•

•

•

•

establish and maintain our relationships with healthcare providers who will be treating the patients who may receive our drug and any future drugs;

obtain adequate pricing and reimbursement for QINLOCK and any future drugs;

obtain regulatory authorization for the development and commercialization of the drug candidates in our pipeline;

develop and maintain successful strategic alliances; and

• manage our spending as costs and expenses increase due to clinical trials, marketing approvals, and commercialization.

If we are unsuccessful in accomplishing these objectives, we may not be able to successfully develop drug candidates, commercialize QINLOCK or any future drugs, raise

capital, expand our business, or continue our operations.

Our reliance on sole source third-party suppliers could harm our ability to commercialize QINLOCK or any drug candidates that may be approved in the future.

We have scaled up our manufacturing process for QINLOCK, and may continue to scale up as needed to satisfy greater drug requirements for commercialization. We do not

currently own or operate manufacturing facilities for the production of QINLOCK or any drug candidates that may be approved in the future. We rely on sole source third-party
suppliers to manufacture and supply QINLOCK which may not be able to produce sufficient inventory to meet commercial demand in a cost-efficient, timely manner, or at all. Our
third-party suppliers may not be required to, or may be unable to, provide us with any guaranteed minimum production levels or have sufficient dedicated capacity for our drug. As a
result, there can be no assurances that we will be able to obtain sufficient quantities of QINLOCK or any drug candidates that may be approved in the future, which could have a
material adverse effect on our business as a whole.

Our relationships with customers and third-party payors will be subject to applicable anti-kickback, fraud and abuse, and other healthcare laws and regulations, and health
information privacy and security laws, which could expose us to criminal sanctions, civil penalties, contractual damages, reputational harm, and diminished profits and future
earnings.

Healthcare providers, physicians, and third-party payors play a primary role in the recommendation and prescription of QINLOCK and any drug candidates for which we

obtain marketing approval. Our arrangements with third-party payors, customers, and other third parties may expose us to broadly applicable fraud and abuse and other healthcare
laws and regulations that may constrain the business or financial arrangements and relationships through which we market, sell, and distribute QINLOCK and any other products for
which we obtain marketing approval. Restrictions under applicable federal and state healthcare laws and regulations, include the following:

•

the federal Anti-Kickback Statute which prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving, or providing remuneration
(including any kickback, bribe, or rebate), directly or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the
purchase, order or recommendation of, any good or service, for which payment may be made, in whole or in part, under a federal healthcare program such as Medicare
and Medicaid. A person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation. Violations are
subject to civil and criminal fines and penalties for each violation, plus up to three times the remuneration involved, imprisonment, and exclusion from government
healthcare programs. In addition, the government may assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute
constitutes a false or fraudulent claim for purposes of the FCA. The Anti-Kickback Statute has been interpreted to apply to arrangements between pharmaceutical
manufacturers, on the one hand, and prescribers, purchasers, and formulary managers, on the other. Although there are a number of statutory exceptions and regulatory
safe harbors protecting some common activities from prosecution, the exceptions and safe harbors are drawn narrowly. Practices that involve remuneration that may be
alleged to be intended to induce prescribing, purchases, or recommendations may be subject to scrutiny if they do not qualify for an exception or safe harbor. Failure to
meet all of the requirements of a particular applicable statutory exception or regulatory safe harbor does not make the conduct per se illegal under the Anti-Kickback
Statute. Instead, the legality of the arrangement will be evaluated on a case-by-case basis based on a cumulative review of all of its facts and circumstances;

•

the federal False Claims laws which impose criminal and civil penalties against individuals or entities for, among other things, knowingly presenting, or causing to be
presented false or fraudulent claims for payment by a federal

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government program, or making a false statement or record material to payment of a false claim or avoiding, decreasing, or concealing an obligation to pay money to the
federal government. The FCA also permits a private individual acting as a "whistleblower" to bring actions on behalf of the federal government alleging violations of the
FCA and to share in any monetary recovery;

• HIPAA, which created additional federal criminal statutes that prohibit knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare

benefit program or obtain, by means of false or fraudulent pretenses, representations, or promises, any of the money or property owned by, or under the custody or control
of, any healthcare benefit program, regardless of the payor (e.g., public or private) and knowingly and willfully falsifying, concealing, or covering up by any trick or
device a material fact or making any materially false statements in connection with the delivery of, or payment for, healthcare benefits, items or services relating to
healthcare matters. Similar to the federal Anti-Kickback Statute, a person or entity can be found guilty of violating HIPAA without actual knowledge of the statute or
specific intent to violate it;

• HIPAA, as amended by HITECH, and their respective implementing regulations, which impose, among other things, requirements on certain covered healthcare

providers, health plans, and healthcare clearinghouses as well as their respective business associates that perform services for them that involve the use, or disclosure of,
individually identifiable health information, relating to the privacy, security, and transmission of individually identifiable health information without appropriate
authorization. HITECH also created new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly applicable to business associates,
and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorneys' fees
and costs associated with pursuing federal civil actions;

•

•

•

•

the federal false statements statute prohibits knowingly and willfully falsifying, concealing, or covering up a material fact or making any materially false statement in
connection with the delivery of or payment for healthcare benefits, items, or services;

federal price reporting laws, which require drug manufacturers to calculate and report complex pricing metrics to government programs, where such reported prices may
be used in the calculation of reimbursement and/or discounts on approved products;

the Sunshine Act, created under the ACA, and its implementing regulations, which require manufacturers of drugs, devices, biologicals, and medical supplies for which
payment is available under Medicare, Medicaid, or the Children's Health Insurance Program (with certain exceptions) to report annually to the HHS under the Open
Payments Program, information related to payments or other transfers of value made to physicians (defined to include doctors, dentists, optometrists, podiatrists, and
chiropractors), and teaching hospitals, as well as ownership and investment interests held by physicians and their immediate family members. Effective January 1, 2022,
these reporting obligations will extend to include transfers of value made to certain non-physician providers such as physician assistants and nurse practitioners. In
addition, many states also require the reporting of payments or other transfers of value. Many of these state laws differ from each other in significant ways, are often not
pre-empted, and may have a more prohibitive effect than the Sunshine Act, thus further complicating compliance efforts; and

analogous state and foreign laws and regulations, such as state and foreign anti-kickback, false claims, consumer protection, and unfair competition laws which may apply
to pharmaceutical business practices, including but not limited to, research, distribution, sales, and marketing arrangements as well as submitting claims involving
healthcare items or services reimbursed by any third-party payor, including commercial insurers; state laws that require pharmaceutical companies to comply with the
pharmaceutical industry's voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government that otherwise restricts payments
that may be made to healthcare providers and other potential referral sources; state laws that require drug manufacturers to file reports with states regarding pricing and
marketing information, such as the tracking and reporting of gifts, compensations, and other remuneration and items of value provided to healthcare professionals and
entities; state and local laws requiring the registration of pharmaceutical sales representatives; and state and foreign laws governing the privacy and security of health
information in certain circumstances, many of which differ from each other in significant ways and are often not pre-empted by HIPAA, thus complicating compliance
efforts.

In the U.S., to help patients afford our approved product, we may utilize programs to assist them, including patient assistance programs and co-pay coupon programs for
eligible patients. Government enforcement agencies have shown increased interest in pharmaceutical companies' product and patient assistance programs, including reimbursement
support services, and a number of investigations into these programs have resulted in significant civil and criminal settlements. In addition, at least one insurer has directed its
network pharmacies to no longer accept co-pay coupons for certain specialty drugs the insurer identified. Our co-pay coupon programs could become the target of similar insurer
actions. In addition, in November 2013, the CMS issued guidance to the issuers of qualified health plans sold through the ACA's marketplaces encouraging such plans to reject
patient

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cost-sharing support from third parties and indicating that the CMS intends to monitor the provision of such support and may take regulatory action to limit it in the future. The CMS
subsequently issued a rule requiring individual market qualified health plans to accept third-party premium and cost-sharing payments from certain government-related entities. In
September 2014, the OIG of the HHS issued a Special Advisory Bulletin warning manufacturers that they may be subject to sanctions under the federal anti-kickback statute and/or
civil monetary penalty laws if they do not take appropriate steps to exclude Part D beneficiaries from using co-pay coupons. Accordingly, companies exclude these Part D
beneficiaries from using co-pay coupons. It is possible that changes in insurer policies regarding co-pay coupons and/or the introduction and enactment of new legislation or
regulatory action could restrict or otherwise negatively affect these patient support programs, which could result in fewer patients using affected products, and therefore could have a
material adverse effect on our sales, business, and financial condition.

Third party patient assistance programs that receive financial support from companies have become the subject of enhanced government and regulatory scrutiny. The OIG has

established guidelines that suggest that it is lawful for pharmaceutical manufacturers to make donations to charitable organizations who provide co-pay assistance to Medicare
patients, provided that such organizations, among other things, are bona fide charities, are entirely independent of and not controlled by the manufacturer, provide aid to applicants on
a first-come basis according to consistent financial criteria and do not link aid to use of a donor's product. However, donations to patient assistance programs have received some
negative publicity and have been the subject of multiple government enforcement actions, related to allegations regarding their use to promote branded pharmaceutical products over
other less costly alternatives. Specifically, in recent years, there have been multiple settlements resulting out of government claims challenging the legality of their patient assistance
programs under a variety of federal and state laws. It is possible that we may make grants to independent charitable foundations that help financially needy patients with their
premium, co-pay, and co-insurance obligations. If we choose to do so, and if we or our vendors or donation recipients are deemed to fail to comply with relevant laws, regulations or
evolving government guidance in the operation of these programs, we could be subject to damages, fines, penalties, or other criminal, civil, or administrative sanctions or
enforcement actions. We cannot ensure that our compliance controls, policies, and procedures will be sufficient to protect against acts of our employees, business partners, or vendors
that may violate the laws or regulations of the jurisdictions in which we operate. Regardless of whether we have complied with the law, a government investigation could impact our
business practices, harm our reputation, divert the attention of management, increase our expenses, and reduce the availability of foundation support for our patients who need
assistance.

On December 2, 2020, the HHS published a regulation removing safe harbor protection for price reductions from pharmaceutical manufacturers to plan sponsors under Part D,

either directly or through pharmacy benefit managers (PBMs), unless the price reduction is required by law. The rule also creates a new safe harbor for price reductions reflected at
the point-of-sale, as well as a safe harbor for certain fixed fee arrangements between PBMs and manufacturers. Implementation of this change and new safe harbors for point-of-sale
reductions in price for prescription pharmaceutical products and PBM service fees are currently under review by the current U.S. presidential administration and may be amended or
repealed. Further, on December 31, 2020, CMS published a new rule, effective January 1, 2023, requiring manufacturers to ensure the full value of co-pay assistance is passed on to
the patient or these dollars will count toward the Average Manufacturer Price and Best Price calculation of the drug. On May 21, 2021, PhRMA sued the HHS in the U.S. District
Court for the District of Columbia, to stop the implementation of the rule claiming that the rule contradicts federal law surrounding Medicaid rebates. It is unclear how the outcome
of this litigation will affect the rule. We cannot predict how the implementation of and any further changes to this rule will affect our business. Although a number of these and other
proposed measures may require authorization through additional legislation to become effective, and the current U.S. presidential administration may reverse or otherwise change
these measures, both the current U.S. presidential administration and Congress have indicated that they will continue to seek new legislative measures to control drug costs.

Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations will involve substantial costs. It is possible that

governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations, or case law involving applicable fraud and abuse or
other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be
subject to significant civil, criminal, and administrative penalties, damages, fines, individual imprisonment, disgorgement, exclusion of products from government funded healthcare
programs, such as Medicare and Medicaid, contractual damages, reputational harm, diminished profits and future earnings, and the curtailment or restructuring of our operations, as
well as additional reporting obligations and oversight if we become subject to a corporate integrity agreement or other agreement to resolve allegations of non-compliance with these
laws. Any action for violation of these laws, even if successfully defended, could cause a pharmaceutical manufacturer to incur significant legal expenses and divert management’s
attention from the operation of the business. If any of the physicians or other healthcare providers or entities with whom we expect to do business is found to be not in compliance
with applicable laws, they may be subject to criminal, civil, or administrative sanctions, including exclusions from government funded healthcare programs, which could have a
material adverse effect on our business, results of operations, financial condition, and prospects.

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The insurance coverage and reimbursement status of our drug is uncertain. QINLOCK and our drug candidates may become subject to unfavorable pricing regulations, third-
party coverage and reimbursement practices, or healthcare reform initiatives, which would harm our business. Failure to obtain or maintain adequate coverage and
reimbursement for new or current products could limit our ability to market those products and decrease our ability to generate revenue.

The regulations that govern marketing approvals, pricing, coverage, and reimbursement for new drugs vary widely from country to country. In the U.S., recently enacted
legislation may significantly change the approval requirements in ways that could involve additional costs and cause delays in obtaining approvals. Some countries require approval
of the sale price of a drug before it can be marketed. In many countries, the pricing review period begins after marketing or product licensing approval is granted. In some foreign
markets, including certain European countries, prescription pharmaceutical pricing remains subject to continuing governmental control even after initial approval is granted. As a
result, we might obtain marketing approval for a product in a particular country, but then be subject to price regulations that delay our commercial launch of the product, possibly for
lengthy time periods, and negatively impact the revenue we are able to generate from the sale of the product in that country. Adverse pricing limitations may hinder our ability to
recoup our investment in QINLOCK or one or more of our drug candidates, even if such drug candidates obtain marketing approval.

Our ability to successfully commercialize our drug and drug candidates also will depend in part on the extent to which coverage and adequate reimbursement for these products

and related treatments will be available from government health administration authorities, private health insurers, and other organizations. Government authorities and other third-
party payors, such as private health insurers and health maintenance organizations, decide which medications they will pay for and establish reimbursement levels. The availability of
coverage and extent of reimbursement by governmental and private payors is essential for most patients to be able to afford cancer treatments. Sales of these or other drug candidates
that we may identify will depend substantially, both domestically and abroad, on the extent to which the costs of our drug and drug candidates will be paid by health maintenance,
managed care, pharmacy benefit, and similar healthcare management organizations, or reimbursed by government health administration authorities, private health coverage insurers,
and other third-party payors. If coverage and adequate reimbursement is not available, or is available only to limited levels, we may not be able to successfully commercialize our
drug or drug candidates. Even if coverage is provided, the approved reimbursement amount may not be high enough to allow us to establish or maintain pricing sufficient to realize a
sufficient return on our investment.

A primary trend in the U.S. healthcare industry and elsewhere is cost containment. Government authorities and third-party payors have attempted to control costs by limiting

coverage and the amount of reimbursement for particular medications. In many countries, including those in Europe, the prices of medical products are subject to varying price
control mechanisms as part of national health systems. In general, the prices of medicines under such systems are substantially lower than in the U.S. Other countries allow
companies to fix their own prices for medicines, but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the
amount that we are able to charge for our drug or drug candidates. Accordingly, in markets outside the U.S., including in Europe, the reimbursement for products may be reduced
compared with the U.S. and may be insufficient to generate commercially reasonable revenues and profits. The U.S. government and state legislatures have also shown significant
interest in implementing cost-containment programs to limit the growth of government-paid healthcare costs, including price controls, restrictions on reimbursement, and
requirements for substitution of generic products for branded prescription drugs. Certain states have enacted legislation with the goal of controlling prices on branded prescription
drugs and placing restrictions on price increases or requiring companies to pay additional rebates in order to receive reimbursement from the state Medicaid programs, the effect of
which is unknown. Adoption of such controls and measures, and tightening of restrictive policies in jurisdictions with existing controls and measures, could limit payments for our
products and could adversely affect our net revenues and operating results.

There is also significant uncertainty related to the insurance coverage and reimbursement of newly approved products and coverage may be more limited than the purposes for

which the medicine is approved by the FDA or comparable foreign regulatory authorities. In the U.S., the principal decisions about reimbursement for new medicines are typically
made by the CMS, an agency within HHS. The CMS decides whether and to what extent a new medicine will be covered and reimbursed under Medicare and private payors tend to
follow the CMS to a substantial degree. Although Part D prescription drug formularies must include drugs within each therapeutic category and class of covered Part D drugs, they
have some flexibility to establish those categories and classes and are not required to cover all of the drugs in each category or class. Part D prescription drug plans may use
formularies to limit the number of drugs that will be covered in any therapeutic class and/or impose differential cost sharing or other utilization management techniques. No uniform
policy of coverage and reimbursement for products exists among third-party payors and coverage and reimbursement levels for products can differ significantly from payor to payor.
As a result, the coverage determination process is often a time consuming and costly process that may 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 applied consistently or obtained in the first instance. It is difficult to predict what the
CMS will decide with respect to reimbursement for fundamentally novel products such as ours, as there is no body of established practices and precedents for these new products.

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Reimbursement agencies in Europe may be more conservative than the CMS. For example, a number of cancer drugs have been approved for reimbursement in the U.S. and have not
been approved for reimbursement in certain European countries. Moreover, eligibility for reimbursement does not imply that any drug will be paid for in all cases or at a rate that
covers our costs, including research, development, manufacture, sale, and distribution. Interim reimbursement levels for new drugs, if applicable, may also not be sufficient to cover
our costs and may not be made permanent. Reimbursement rates may vary according to the use of the drug and the clinical setting in which it is used, may be based on
reimbursement levels already set for lower cost drugs and may be incorporated into existing payments for other services. Our inability to promptly obtain coverage and profitable
payment rates from both government-funded and private payors for our approved drug or any drug candidate for which we obtain marketing approval could have a material adverse
effect on our operating results, our ability to raise capital needed to commercialize our drug and drug candidates, and our overall financial condition.

Net prices for drugs may be reduced by mandatory discounts or rebates required by government healthcare programs or private payors and by any future relaxation of laws that

presently restrict imports of drugs from countries where they may be sold at lower prices than in the U.S. Our inability to promptly obtain coverage and profitable reimbursement
rates from third-party payors for any approved products that we develop could have a material adverse effect on our operating results, our ability to raise capital needed to
commercialize products, and our overall financial condition.

Increasingly, third-party payors are requiring that drug companies provide them with predetermined discounts from list prices and are challenging the prices charged for
medical products. We cannot be sure that reimbursement will be available for any drug or drug candidate that we commercialize and, if reimbursement is available, the level of
reimbursement. Reimbursement may impact the demand for, or the price of, our approved drug or any drug candidate for which we obtain marketing approval. In order to obtain
reimbursement, physicians may need to show that patients have superior treatment outcomes with our approved drug and any of our drug candidates for which we obtain marketing
approval, compared to standard of care drugs, including lower-priced generic versions of standard of care drugs. We expect to experience pricing pressures in connection with the
sale of our approved drug and any of our drug candidates for which we obtain marketing approval, due to the trend toward managed healthcare, the increasing influence of health
maintenance organizations, and additional legislative changes. The downward pressure on healthcare costs in general, particularly prescription drugs and surgical procedures and
other treatments, has become very intense. As a result, increasingly high barriers are being erected to the entry of new products.

The ACA requires pharmaceutical manufacturers of branded prescription drugs to pay a branded prescription drug fee to the federal government. Each such manufacturer is

required to pay a prorated share of the branded prescription drug fee of $4.1 billion in 2018 and $2.8 billion in each year thereafter, based on the dollar value of its branded
prescription drug sales to certain federal programs identified in the law. The ACA also expanded the 340B program (described below), to include additional types of covered entities.
We will participate in the 340B program for QINLOCK and any of our drug candidates for which we receive approval. Federal law requires that any company that participates in the
Medicaid rebate program also participate in the 340B program in order for federal funds to be available for the manufacturer's drugs under Medicaid. The 340B program requires
participating manufacturers to agree to charge statutorily defined covered entities no more than the 340B "ceiling price" for the manufacturer's covered outpatient drugs. In addition,
in order to be eligible to have its products paid for with federal funds under the Medicaid programs and purchased by certain federal grantees and agencies, a manufacturer also must
participate in the FSS pricing program, established by Section 603 of the Veterans Health Care Act of 1992. Under this program, the manufacturer is obligated to make products
available for procurement on an FSS contract and charge a price to four federal agencies—the Department of Veterans Affairs, the Department of Defense, the Public Health Service,
and the Coast Guard—that is at least 24% less than the non-FAMP for the prior fiscal year.

The requirements under the 340B and FSS programs, and the extent to which eligible patients utilize our patient assistance programs, could reduce the revenue we may

generate and could adversely affect our business and operating results.

Additionally, we may develop companion diagnostic tests for use with our drug or drug candidates. We, or our collaborators, may be required to obtain coverage and

reimbursement for these tests separate and apart from the coverage and reimbursement we seek for our drug and drug candidates, if approved. Even if we obtain regulatory approval
or clearance for such companion diagnostics, there is significant uncertainty regarding our ability to obtain coverage and adequate reimbursement for the same reasons applicable to
our drug or drug candidates. Medicare reimbursement methodologies, whether under Part A, Part B, or clinical laboratory fee schedule may be amended from time to time, and we
cannot predict what effect any change to these methodologies would have on any drug, drug candidate, or companion diagnostic for which we receive approval. Our inability to
promptly obtain coverage and adequate reimbursement from both third-party payors for the companion diagnostic tests that we develop and for which we obtain regulatory approval
could have a material and adverse effect on our business, financial condition, results of operations, and prospects.

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Recently enacted and future legislation may increase the difficulty and cost for us to obtain marketing approval of and commercialize our drug candidates and decrease the
prices we may obtain for our approved drug.

In the U.S. and some foreign jurisdictions, there have been a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could

prevent or delay marketing approval of our drug candidates, restrict or regulate post-approval activities, and affect our ability to profitably sell our approved drug and any drug
candidates for which we obtain marketing approval.

In the U.S., the MMA changed the way Medicare covers and pays for pharmaceutical products. The legislation expanded Medicare coverage for drug purchases by the elderly

and introduced a new reimbursement methodology based on average sales prices for physician-administered drugs. In addition, this legislation provided authority for limiting the
number of drugs that will be covered in any therapeutic class. Cost reduction initiatives and other provisions of this legislation could decrease the coverage and price that we receive
for our approved products. While the MMA applies only to drug benefits for Medicare beneficiaries, private payors often follow Medicare coverage policy and payment limitations
in setting their own reimbursement rates. Therefore, any reduction in reimbursement that results from the MMA may result in a similar reduction in payments from private payors.

In March 2010, the ACA was enacted into law. The ACA is a sweeping law intended to broaden access to health insurance, reduce or constrain the growth of healthcare
spending, enhance remedies against fraud and abuse, add new transparency requirements for the healthcare and health insurance industries, impose new taxes and fees on the health
industry, and impose additional health policy reforms.

Among the provisions of the ACA of importance to our approved drug and potential drug candidates are the following:

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an annual, nondeductible fee on any entity that manufactures or imports specified branded prescription drugs and biologic products;

an increase in the statutory minimum rebates a manufacturer must pay under the MDRP;

expansion of healthcare fraud and abuse laws, including the FCA and the Anti-Kickback Statute, new government investigative powers, and enhanced penalties for non-
compliance;

extension of manufacturers' Medicaid rebate liability;

expansion of eligibility criteria for Medicaid programs;

expansion of the entities eligible for discounts under the Public Health Service pharmaceutical pricing program;

requirements to report financial arrangements with physicians and teaching hospitals;

a requirement to annually report drug samples that manufacturers and distributors provide to physicians; and

a Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such
research.

Some of the provisions of the ACA have yet to be fully implemented, while certain provisions have been subject to reform through legislation and Executive Orders by the

previous U.S. presidential administration and to judicial challenges. In 2012, the U.S. Supreme Court heard challenges to the constitutionality of the individual mandate and the
viability of certain provisions of the ACA. The Supreme Court's decision upheld most of the ACA and determined that requiring individuals to maintain "minimum essential" health
insurance coverage or pay a penalty to the Internal Revenue Service was within Congress's constitutional taxing authority. However, as a result of tax reform legislation enacted into
law in late December 2017, the individual mandate has been eliminated, effective January 1, 2019. On June 17, 2021, the U.S. Supreme Court dismissed the most recent judicial
challenge to the ACA brought by several states without specifically ruling on the constitutionality of the ACA. Prior to the Supreme Court's decision, the current U.S. president
issued an executive order to initiate a special enrollment period from February 15, 2021 through August 15, 2021 for the purpose of obtaining health insurance coverage through the
ACA marketplace. The executive order also instructed certain governmental agencies to review and reconsider their existing policies and rules that limit access to healthcare,
including, among others, reexamining Medicaid demonstration projects and waiver programs that include work requirements, and policies that create unnecessary barriers to
obtaining access to health insurance coverage through Medicaid or the ACA. It is unclear how other healthcare reform measures of the current U.S. presidential administration or
other efforts, if any, to challenge, repeal, or replace the ACA will impact our business.

On January 22, 2018, the previous U.S. President signed a continuing resolution on appropriations for fiscal year 2018 that delayed the implementation of certain ACA-
mandated fees, including the so-called "Cadillac" tax on certain high cost employer-sponsored insurance plans, the annual fee imposed on certain health insurance providers based on
market share, and the medical

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device excise tax on non-exempt medical devices. However, on December 20, 2019, the previous U.S. President signed into law H.R. 1865, which repeals the Cadillac tax, the health
insurance provider tax, and the medical device excise tax. The BBA among other things, amends the ACA, effective January 1, 2019, to close the coverage gap in most Medicare
drug plans, commonly referred to as the "donut hole."

In December 2018, the CMS published a final rule permitting further collections and payments to and from certain ACA qualified health plans and health insurance issuers

under the ACA risk adjustment program in response to the outcome of federal district court litigation regarding the method the CMS uses to determine this risk adjustment. In
addition, the CMS has recently published a final rule that would give states greater flexibility, starting in 2020, in setting benchmarks for insurers in the individual and small group
marketplaces, which may have the effect of relaxing the essential health benefits required under the ACA for plans sold through such marketplaces.

Other legislative changes have also been proposed and adopted since the ACA was enacted that, directly or indirectly, affect or are likely to affect, the pharmaceutical industry
and the commercialization of our products, including the BCA, ATRA, and the Middle Class Tax Relief and Job Creation Act of 2012. In August 2011, the BCA, among other things,
created measures for spending reductions by Congress. A Joint Select Committee on Deficit Reduction, tasked with recommending a targeted deficit reduction of at least $1.2 trillion
for the years 2013 through 2021, was unable to reach required goals, thereby triggering the legislation's automatic reduction to several government programs. This includes aggregate
reductions of Medicare payments to providers up to 2% per fiscal year, and, due to subsequent legislative amendments, will remain in effect through 2030 unless additional
Congressional action is taken. However, the Medicare sequester reductions under the BCA will be suspended from May 1, 2020 through March 31, 2022 due to the COVID-19
pandemic. Following the temporary suspension, a 1% payment reduction will occur beginning April 1, 2022 through June 30, 2022, and the 2% payment reduction will resume on
July 1, 2022. The ATRA among other things, reduced Medicare payments to several providers, including hospitals, imaging centers and cancer treatment centers, and increased the
statute of limitations period for the government to recover overpayments to providers from three to five years.

In addition, the Creating and Restoring Equal Access to Equivalent Samples Act (CREATES Act) was enacted in 2019 requiring sponsors of approved NDAs and Biologics

License Applications to provide sufficient quantities of product samples on commercially reasonable, market-based terms to entities developing generic drugs and biosimilar
biological products. The law establishes a private right of action allowing developers to sue application holders that refuse to sell them product samples needed to support their
applications. If we are required to provide product samples or allocate additional resources to responding to such requests or any legal challenges under this law, our business could
be adversely impacted.

We expect that the ACA, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional
downward pressure on the price that we receive for our products that obtain marketing approval. Any reduction in reimbursement from Medicare or other government programs may
result in a similar reduction in payments from private payors. The implementation of cost-containment measures or other healthcare reforms may prevent us from being able to
generate revenue, attain profitability, or commercialize our products.

There has been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products, which have resulted in several recent
Congressional inquiries and proposed bills designed to, among other things, bring more transparency to product pricing, review the relationship between pricing and manufacturer
patient programs, and reform government program reimbursement methodologies for products. In addition, the U.S. government, state legislatures, and foreign governments have
shown significant interest in implementing cost-containment programs, including price-controls, restrictions on reimbursement, and requirements for substitution of generic products
for branded prescription drugs to limit the growth of government paid healthcare costs. At the federal level, the current U.S. president signed an Executive Order on July 9, 2021 (the
July 9, 2021 Executive Order) affirming the administration's policy to (i) support legislative reforms that would lower the price of prescription drugs and biologics, including by
allowing Medicare to negotiate drug prices, by imposing inflation caps, and, by supporting the development and market entry of lower-cost generic drugs and biosimilars; and (ii)
support the enactment of a public health insurance option. Among other things, the July 9, 2021 Executive Order also directs the HHS to provide a report on actions to combat
excessive pricing of prescription drugs, enhance the domestic drug supply chain, reduce the price that the Federal government pays for drugs, and address price gouging in the
industry; and directs the FDA to continue to clarify and improve the approval framework for generic drugs, identify and address any efforts to impede generic drug competition, and
work with states and Indian Tribes that propose to develop section 804 Importation Programs in accordance with the MMA and the FDA's implementing regulations. The FDA
released such implementing regulations on September 24, 2020, which went into effect on November 30, 2020, providing guidance for states to build and submit importation plans
for drugs from Canada. In response, authorities in Canada have passed rules designed to safeguard the Canadian drug supply from shortages. If implemented, importation of drugs
from Canada and the MFN Model may materially and adversely affect the price we receive for any of our product candidates. Further, on November 20, 2020, the CMS issued an
Interim Final Rule implementing the Most Favored Nation (MFN) Model under which Part B reimbursement rates would have been calculated for certain drugs and

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biologicals based on the lowest price drug manufacturers receive in Organization for Economic Cooperation and Development countries with a similar gross domestic product per
capita. However, on December 29, 2021 CMS rescinded the Most Favored Nations rule. Additionally, on December 2, 2020, the HHS published a regulation removing safe harbor
protection for price reductions from pharmaceutical manufacturers to plan sponsors under Part D, either directly or through PBMs, unless the price reduction is required by law. The
rule also creates a new safe harbor for price reductions reflected at the point-of-sale, as well as a safe harbor for certain fixed fee arrangements between PBMs and manufacturers.
Pursuant to court order, the removal and addition of the aforementioned safe harbors have been delayed until January 1, 2023. Implementation of this change and new safe harbors
for point-of-sale reductions in price for prescription pharmaceutical products and PBM service fees are currently under review by the current U.S. presidential administration and
may be amended or repealed. Although a number of these and other proposed measures may require authorization through additional legislation to become effective, and the current
U.S. presidential administration may reverse or otherwise change these measures, both the current U.S. presidential administration and Congress have indicated that they will
continue to seek new legislative measures to control drug costs.

Individual states in the U.S. have also become 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.

Legislative and regulatory proposals have been made to expand post-approval requirements and restrict sales and promotional activities for pharmaceutical products. We
cannot be sure whether additional legislative changes will be enacted, or whether FDA regulations, guidance or interpretations will be changed, or what the impact of such changes
on the marketing approvals of our drug or drug candidates, if any, may be. In addition, increased scrutiny by the U.S. Congress of the FDA's approval process may significantly delay
or prevent marketing approval, as well as subject us to more stringent product labeling and post-marketing testing and other requirements.

There have been, and likely will continue to be, legislative and regulatory proposals at the foreign, federal and state levels directed at containing or lowering the cost of
healthcare. The implementation of cost-containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability, or commercialize
our products. Such reforms could have an adverse effect on anticipated revenue from our drug or drug candidates that we may successfully develop and for which we may obtain
regulatory approval and may affect our overall financial condition and ability to develop future drug candidates. We cannot predict the initiatives that may be adopted in the future.
The continuing efforts of the government, insurance companies, managed care organizations, and other payors of healthcare services to contain or reduce costs of healthcare and/or
impose price controls may adversely affect:

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the demand for our drug and drug candidates, if approved;

our ability to receive or set a price that we believe is fair for our products;

our ability to generate revenue and achieve or maintain profitability;

the amount of taxes that we are required to pay; and

the availability of capital.

We expect that the ACA, as well as other healthcare reform measures that may be adopted in the future, may result in additional reductions in Medicare and other healthcare

funding, more rigorous coverage criteria, lower reimbursement, and new payment methodologies. This could lower the price that we receive for our approved products. Any denial in
coverage or reduction in reimbursement from Medicare or other government-funded programs may result in a similar denial or reduction in payments from private payors, which
may prevent us from being able to generate sufficient revenue, attain profitability or commercialize our drug and drug candidates, if approved. Litigation and legislative efforts to
change or repeal the ACA are likely to continue, with unpredictable and uncertain results.

QINLOCK or any current drug candidates, such as vimseltinib and DCC-3116, or future drug candidates, if successfully developed and approved, may cause undesirable side
effects that limit the commercial profile or result in other significant negative consequences for approved products; or delay or prevent further development or regulatory
approval with respect to drug candidates or new indications, or cause regulatory authorities to require labeling statements, such as boxed warnings.

Undesirable side effects caused by QINLOCK or any current drug candidates, such as vimseltinib and DCC-3116, or future approved drugs could limit the commercial profile

of such drug or result in significant negative consequences such as a more restrictive label or other limitations or restrictions.

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Undesirable side effects caused by our drug candidates could cause us or regulatory authorities to interrupt, delay or halt non-clinical studies and clinical trials or could result

in a more restrictive label or the delay or denial of regulatory approval by the FDA, the EMA, or other regulatory authorities.

Clinical trials by their nature utilize a sample of the potential patient population. With a limited number of patients and limited duration of exposure, certain side effects of
QINLOCK or of our current drug candidates, such as vimseltinib and DCC-3116, or future drug candidates may only be uncovered with a significantly larger number of patients
exposed to the drug, and those side effects could be serious or life-threatening. If we or others identify undesirable side effects caused by QINLOCK or any future approved drug (or
any other similar drugs), a number of potentially significant negative consequences could result, including:

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regulatory authorities may withdraw or limit their approval of such drugs;
regulatory authorities may require the addition of labeling statements, such as a “boxed” warning or additions to an existing boxed warning, or a contraindication,
including as a result of inclusion in a class of drugs for a particular disease;

regulatory authorities may refuse to approve label expansion for additional indications for any approved drugs;

• we may be required to change the way such drugs are distributed or administered, conduct additional clinical trials or change the labeling of the drugs;

• we may be subject to regulatory investigations and government enforcement actions;

• we may decide to remove such drugs from the marketplace;

• we could be sued and held liable for injury caused to individuals exposed to or taking such drugs; and

•

our reputation may suffer.

We believe that any of these events could prevent us from advancing clinical development or achieving or maintaining market acceptance of the affected drug, and could

substantially increase the costs of commercializing such drugs and significantly impact our ability to successfully commercialize such drugs and generate revenues.

We may incur significant liability if enforcement authorities allege or determine that we are engaging in commercial activities or promoting QINLOCK in a way that violates
applicable regulations.

Physicians have the discretion to prescribe drug products for uses that are not described in the product's labeling and that differ from those approved by the FDA or other
applicable regulatory agencies. Off-label uses are common across medical specialties. Although the FDA and other regulatory agencies do not regulate a physician's choice of
treatments, the FDA and other regulatory agencies regulate a manufacturer's communications regarding off-label use and prohibit off-label promotion, as well as the dissemination of
false or misleading labeling or promotional materials. Manufacturers may not promote drugs for off-label uses. Accordingly, we may not promote QINLOCK in the U.S. or Europe
for use in any indications other than the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib.
The FDA, competent authorities of the Member States in the EU, and other regulatory and enforcement authorities actively enforce laws and regulations prohibiting promotion of
off-label uses and the promotion of products for which marketing approval has not been obtained. A company that is found to have improperly promoted off-label uses, including
promoting unapproved dosing regimens, may be subject to significant liability, which may include civil and administrative remedies as well as criminal sanctions.

Notwithstanding regulations related to product promotion, the FDA, competent authorities of the Member States of the EU, and other regulatory authorities allow companies to

engage in truthful, non-misleading, and non-promotional scientific exchange concerning their products. We intend to engage in medical education activities and communicate with
healthcare providers in compliance with all applicable laws and regulatory guidance.

Laws and regulations governing our current international operations or international operations we may have in the future may preclude us from developing, manufacturing,
and selling certain drug candidates and products outside of the U.S. and require us to develop and implement costly compliance programs.

As we expand our operations outside of the U.S. in key European markets, we must dedicate additional resources to comply with numerous laws and regulations in each
jurisdiction in which we plan to operate. The Foreign Corrupt Practices Act (FCPA) prohibits any U.S. individual or business from paying, offering, authorizing payment, or offering
anything of value, directly or indirectly, to any foreign official, political party, or candidate for the purpose of influencing any act or decision of such third party

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in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the U.S. to comply with certain
accounting provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the company, including international subsidiaries, and
to devise and maintain an adequate system of internal accounting controls for international operations.

Compliance with the FCPA is expensive and difficult, particularly in countries in which corruption is a recognized problem. In addition, the FCPA presents particular
challenges in the pharmaceutical industry, because, in many countries, hospitals are operated by the government, and doctors and other hospital employees are considered foreign
officials. Certain payments to hospitals in connection with clinical trials and other work have been deemed to be improper payments to government officials and have led to FCPA
enforcement actions. Similar laws in other countries, such as the U.K. Bribery Act 2010, may apply to our operations.

Various laws, regulations, and executive orders also restrict the use and dissemination outside of the U.S., or the sharing with certain non-U.S. nationals, of information

classified for national security purposes, as well as certain products and technical data relating to those products. As we expand our presence outside of the U.S. in key European
markets, we must dedicate additional resources to comply with these laws, and such laws may preclude us from developing, manufacturing, or selling certain drug candidates and
products outside of the U.S., which could limit our growth potential and increase our development costs.

The failure to comply with laws governing international business practices may result in substantial civil and criminal penalties and suspension or debarment from government

contracting. The SEC also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA's accounting provisions.

Governments outside of the U.S. tend to impose strict price controls, which may adversely affect our revenues, if any.

In some countries, particularly Canada and the countries of Europe, the pricing of prescription pharmaceuticals is subject to governmental control. In these countries, pricing

negotiations with governmental authorities can take considerable time after the receipt of marketing authorization for a product. To obtain reimbursement or pricing approval in some
countries, we may be required to conduct a clinical trial that compares the cost-effectiveness of our drug candidate to other available therapies. If reimbursement of our products is
unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels, our business could be harmed.

The U.K.'s exit from the EU may have a negative effect on global economic conditions, financial markets, and our business.

In June 2016, the U.K. held a referendum in which voters approved an exit from the EU, commonly referred to as “Brexit.” This withdrawal has created political and economic

uncertainty, particularly in the U.K. and the EU, where we currently conduct clinical trials and intend to seek marketing approvals in the future. During the Brexit transition period,
which ended on December 31, 2020, the U.K. continued to follow all of the EU's rules and maintained its current trading relationship with the EU. In December 2020, the U.K. and
EU signed the TCA, which became provisionally applicable on January 1, 2021 and has been formally applicable since May 1, 2021. The TCA sets out the arrangements between the
U.K. and EU on trade in certain areas (e.g. goods and some services, energy, fisheries, social security coordination), however there is still uncertainty over how some of its terms will
take effect in practice and there are still key aspects of the U.K.’s relationship with the EU which are not covered by the TCA, such as in respect of financial services. We expect that
uncertainty over the terms of the TCA and other future agreements between the U.K. and EU will continue to cause political and economic uncertainty, which could harm our
business and financial results. The withdrawal will, among other outcomes, disrupt the free movement of goods, services and people between the U.K. and the EU, and result in
increased legal and regulatory complexities, as well as potential higher costs of conducting business in Europe. Until there is greater understanding on how the terms of the TCA will
take effect in the long-term, and until the terms of other potential agreements that the U.K. may eventually enter into with the EU are known, it is not possible to determine the extent
of the impact that the U.K.'s departure from the EU and/or any related matters may have on us; however, any of these effects of Brexit, and others we cannot anticipate, could
adversely affect our business, business opportunities, results of operations, financial condition, and cash flows. Likewise, similar actions taken by European and other countries in
which we operate could have a similar or even more profound impact.

For example, the TCA includes limited specific provisions concerning medicinal products, primarily regarding the mutual recognition of good manufacturing practice (GMP)

inspections of manufacturing facilities for medicinal products and GMP documents issued, but does not foresee wholesale mutual recognition of U.K. and EU pharmaceutical
regulations. Since the regulatory framework in the U.K. covering the quality, safety and efficacy of medicinal products, clinical trials, marketing authorizations, commercial sales and
distribution of medicinal products is derived from EU directives and regulations, Brexit could materially impact the future regulatory regime with respect to the approval of our
current or future product candidates in the U.K. now that the U.K. legislation has the potential to diverge from EU legislation. For instance, GB (under the Northern Ireland

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Protocol, the EU regulatory framework will continue to apply in Northern Ireland and centralized EU authorizations will continue to be recognized) will now no longer be covered
by the centralized procedure for obtaining marketing authorizations for medicinal products which are valid throughout the EEA, and a separate process for authorization of drug
products will be required in GB, resulting in an authorization covering the U.K. or GB only. In addition, the withdrawal of the U.K. from the EU has had and may continue to have a
material adverse effect on global economic conditions and the stability of global financial markets, and may significantly reduce global market liquidity and restrict the ability of key
market participants to operate in certain financial markets. Any of these effects of Brexit, among others, could adversely affect our business, our results of operations, liquidity, and
financial condition.

We may fail to comply with evolving U.S. federal and state and foreign privacy and data protection laws, which could adversely affect our business, results of operations and
financial condition.

In California, the CCPA was enacted in June 2018, became effective on January 1, 2020, and became subject to enforcement by the California Attorney General's office on

July 1, 2020. The CCPA broadly defines personal information, gives California residents expanded individual privacy rights and protections and provides for civil penalties for
violations and a private right of action for data breaches. Further, a new California privacy law, the California Privacy Rights Act (CPRA) was passed by California voters on
November 3, 2020. The CPRA will create additional obligations with respect to processing and storing personal information that are scheduled to take effect on January 1, 2023
(with certain provisions having retroactive effect to January 1, 2022). We will continue to monitor developments related to the CPRA and anticipate additional costs and expenses
associated with CPRA compliance. While there is an exception for protected health information that is subject to HIPAA and clinical trial regulations, the CCPA and CPRA may
impact our business activities if we become a “Business” regulated by the scope of the CCPA or are subject to CPRA and there continues to be some uncertainly about how certain
provisions of the CCPA will be interpreted and how the law will be enforced.

In addition, on March 2, 2021, Virginia enacted the Consumer Data Protection Act (CPDA). The CDPA will become effective January 1, 2023. The CDPA will regulate how
businesses (which the CDPA refers to as “controllers”) collect and share personal information. While the CDPA incorporates many similar concepts of the CCPA and CPRA, there
are also several key differences in the scope, application, and enforcement of the law that will change the operational practices of controllers. The new law will impact how
controllers collect and process personal sensitive data, conduct data protection assessments, transfer personal data to affiliates, and respond to consumer rights requests.

Also, on July 8, 2021, Colorado’s governor signed the Colorado Privacy Act (CPA), into law. The CPA is rather similar to the CPDA but also contains additional requirements.
The new measure applies to companies conducting business in Colorado or who produce or deliver commercial products or services intentionally targeted to its residents of the state
that either: (1) control or process the personal data of at least 100,000 consumers during a calendar year; or (2) derive revenue or receive a discount on the price of goods or services
from the sale of personal data and process or control the personal data of at least 25,000 consumers.

With the CPA, Colorado became the third state to enact a comprehensive privacy law but it is quite possible that other states will follow suit. New privacy and data security
laws have been proposed in more than half of the states in the U.S. and in the U.S. Congress, reflecting a trend toward more stringent privacy legislation in the U.S., which trend may
accelerate with the new U.S. presidential administration. The existence of comprehensive privacy laws in different states in the country will make our compliance obligations more
complex and costly and may require us to modify our data processing practices and policies and to incur substantial costs and potential liability in an effort to comply with such
legislation.

In the EU and the U.K., we may also face particular privacy, data security, and data protection risks in connection with requirements of the GDPR, the GDPR as it existed on
December 31, 2020 but subject to certain U.K. specific amendments incorporated into U.K. law on January 1, 2021 under the U.K. GDPR, and other data protection requirements.
The GDPR applies to any company established in the EU as well as to those outside the EU if they collect and use personal data in connection with the offering of goods or services
to individuals in the EU or the monitoring of their behavior. The GDPR has enhanced data protection obligations for controllers of personal data, including, for example, expanded
disclosures about how personal information is to be used, limitations on retention of information, mandatory data breach notification requirements, restrictions on transfers outside of
the EU to third countries deemed to lack adequate privacy protections (such as the U.S.), and has created onerous new obligations and liabilities on services providers or data
processors. Non-compliance with the GDPR may result in monetary penalties of up to €20 million or 4% of worldwide revenue, whichever is higher. Moreover, data subjects can
claim damages resulting from infringement of the GDPR. The GDPR further grants non-profit organizations the right to bring claims on behalf of data subjects. The GDPR and other
changes in laws or regulations associated with the enhanced protection of certain types of personal data, such as healthcare data or other sensitive information, could greatly increase
our cost of providing our products and services or even prevent us from offering certain services in jurisdictions that we may operate in. The GDPR may increase our responsibility
and liability in relation to personal data that we process where such processing is subject to the GDPR,

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and we may be required to put in place additional mechanisms to ensure compliance with the GDPR, including as implemented by individual countries. Compliance with the GDPR
will be a rigorous and time-intensive process that may increase our cost of doing business or require us to change our business practices, and despite those efforts, there is a risk that
we may be subject to fines and penalties, litigation, and reputational harm in connection with our European activities.

In addition, further to the U.K.'s exit from the EU on January 31, 2020, the GDPR ceased to apply in the U.K. at the end of the transition period on December 31, 2020.
However, as of January 1, 2021, the U.K.’s European Union (Withdrawal) Act 2018 incorporated the U.K. GDPR into U.K. law. The U.K. GDPR and the U.K. Data Protection Act
2018 set out the U.K.'s data protection regime, which is independent from but aligned to the EU's data protection regime. Non-compliance with the U.K. GDPR may result in
monetary penalties of up to £17.5 million or 4% of worldwide revenue, whichever is higher. In addition, on June 28, 2021, the EC adopted an adequacy decision in respect of
transfers of personal data to the U.K. for a four-year period (until June 27, 2025). Similarly, the U.K. has determined that it considers all of the EEA to be adequate for the purposes
of data protection. This ensures that data flows between the U.K. and the EEA remain unaffected.

We currently conduct clinical trials and engage in regulatory and commercial operations in the EEA and the U.K. As a result, we are subject to additional privacy laws,
including the GDPR and U.K. GDPR. The GDPR imposes a broad range of strict requirements on companies subject to the GDPR, including requirements relating to having legal
bases for processing personal information relating to identifiable individuals and transferring such information outside the EEA or the U.K., including to the U.S., providing details to
those individuals regarding the processing of their personal information, where required obtaining consent from data subjects to process their personal information, keeping personal
information secure, having data processing agreements with third parties who process personal information, responding to individuals' requests to exercise their rights in respect of
their personal information, reporting security breaches involving personal data to the competent national data protection authority and affected individuals, appointing data protection
officers, conducting data protection impact assessments, and record-keeping.

Over the past few years, the number of enforcement actions and the fines have both steadily increased. U.S. Data Privacy laws, such as the CCPA, CPRA, and others that may

be passed, similarly introduce requirements with respect to personal information, and non-compliance with the CCPA may result in liability through private actions (subject to
defined statutory damages in the event of certain data breaches) and enforcement. Failure to comply with these current and future laws, policies, industry standards, or legal
obligations or any security incident resulting in the unauthorized access to, corruption of, or acquisition, release, or transfer of personal information may result in government
enforcement actions, litigation, fines, and penalties, or adverse publicity and could cause our customers, business partners, and investors to lose trust in us which could have a
material adverse impact on our business and results of our operations. We continue to face uncertainty as to the exact interpretation of the new requirements on our trials and we may
be unsuccessful in implementing all measures required by data protection authorities or courts in interpretation of the new law.

In particular, the Member States have implemented national laws which may partially deviate from the GDPR and impose different and more restrictive obligations from

country to country, so that we do not expect to operate in a uniform legal landscape in the EU. Also, as it relates to processing and transfer of genetic data, the GDPR specifically
allows the Member States to enact laws that impose additional and more specific requirements or restrictions, and European laws have historically differed quite substantially in this
field, leading to additional uncertainty.

In addition, we must also ensure that we maintain adequate safeguards to enable the transfer of personal data outside of the EEA or the U.K., in particular to the U.S., in

compliance with European and U.K. data protection laws. We expect that we will continue to face uncertainty as to whether our efforts to comply with our obligations under
European privacy laws will be sufficient. In some cases, we rely upon the standard contractual clauses to legitimize transfers of personal data out of Europe. On June 4, 2021, the EC
issued new forms of standard contractual clauses for data transfers from controllers or processors in the EEA (or otherwise subject to the GDPR) to controllers or processors
established outside the EEA (and not subject to the GDPR). The new forms of standard contractual clauses will replace the standard contractual clauses that were adopted previously
under the Data Protection Directive. We will be required to transition to the new forms of standard contractual clauses and doing so will require significant effort and cost. The new
standard contractual clauses may also impact our business as companies based in Europe may be reluctant to utilize the new clauses to legitimize transfers of personal information to
third countries given the burdensome requirements of transfer impact assessments and the substantial obligations that the new standard contractual clauses impose upon exporters. If
we are investigated by a European data protection authority, we may face fines and other penalties. Any such investigation or charges by European data protection authorities could
have a negative effect on our existing business and on our ability to attract and retain new clients or pharmaceutical partners. We may also experience hesitancy, reluctance, or refusal
by European or multi-national clients or pharmaceutical partners to continue to use our products due to the potential risk exposure as a result of the current (and, in particular, future)
data protection obligations imposed on them by certain data protection authorities in interpretation of current law, including the GDPR. Such clients or pharmaceutical partners may
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alternative approaches to compliance as being too costly, too burdensome, too legally uncertain, or otherwise objectionable and therefore decide not to do business with us. Any of
the foregoing could materially harm our business, prospects, financial condition, and results of operations.

In addition, many jurisdictions outside of Europe are also considering and/or enacting comprehensive data protection legislation. For example, as of August 2020, the Brazilian

General Data Protection Law imposes stringent requirements similar to GDPR with respect to personal information collected from individuals in Brazil.

In China, there have also been recent significant developments concerning privacy and data security. On June 10, 2021, the Standing Committee of the PRC National People’s

Congress published the Data Security Law of the People’s Republic of China (the “Data Security Law”), which took effect on September 1, 2021. The Data Security Law requires
data processing (which includes the collection, storage, use, processing, transmission, provision and publication of data), to be conducted in a legitimate and proper manner. The Data
Security Law imposes data security and privacy obligations on entities and individuals carrying out data processing activities and also introduces a data classification and hierarchical
protection system based on the importance of data in economic and social development and the degree of harm it may cause to national security, public interests, or legitimate rights
and interests of individuals or organizations if such data are tampered with, destroyed, leaked, illegally acquired or illegally used. The appropriate level of protection measures is
required to be taken for each respective category of data.

Also in China, on August 20, 2021, the Standing Committee of the National People’s Congress of the PRC promulgated the Personal Information Protection Law, which took

effect on November 1, 2021. The Personal Information Protection Law raises the protection requirements for processing personal information, and many specific requirements of the
Personal Information Protection Law remain to be clarified. We may be required to make further significant adjustments to our business practices to comply with the personal
information protection laws and regulations in China including the Personal Information Protection Law.

We also continue to see jurisdictions, such as Russia, imposing data localization laws, which under Russian laws require personal information of Russian citizens to be, among
other data processing operations, initially collected, stored, and modified in Russia. These regulations may interfere with our intended business activities, inhibit our ability to expand
into those markets or prohibit us from continuing to offer services in those markets without significant additional costs.

Because the interpretation and application of many privacy and data protection laws (including the GDPR), commercial frameworks, and standards are uncertain, it is possible
that these laws, frameworks, and standards may be interpreted and applied in a manner that is inconsistent with our existing data management practices and policies. If so, in addition
to the possibility of fines, lawsuits, breach of contract claims, and other claims and penalties, we could be required to fundamentally change our business activities and practices or
modify our solutions, which could have an adverse effect on our business. Any inability to adequately address privacy and security concerns, even if unfounded, or comply with
applicable privacy and security or data security laws, regulations, and policies, could result in additional cost and liability to us, damage our reputation, inhibit our ability to conduct
trials, and adversely affect our business.

Our future success depends on our ability to retain key executives and to attract, retain, and motivate qualified personnel.

Our future operations will depend in large part on the efforts of our President and Chief Executive Officer, Steven L. Hoerter. In addition, we are highly dependent on the
research, development, and management expertise of the other principal members of our executive team, including, without limitation, the research expertise on switch-control
kinase inhibitors of Daniel L. Flynn, Ph.D., our founder and Chief Scientific Officer, and the clinical development expertise of Matthew L. Sherman, M.D., our Chief Medical
Officer. Although we have entered into employment agreements with our executive officers, each of them may terminate their employment with us at any time. We maintain “key
person” insurance for Dr. Flynn, but not for any of our other executives or employees.

Recruiting and retaining qualified scientific, clinical, manufacturing, and sales and marketing personnel will also be critical to our success. The loss of the services of our

executive officers or other key employees could impede the achievement of our research, development, and commercialization objectives and seriously harm our ability to
successfully implement our business strategy. Furthermore, replacing executive officers and key employees may be difficult and may take an extended period of time because of the
limited number of individuals in our industry with the breadth of skills and experience required to successfully develop, gain marketing approval of, and commercialize products.
Competition to hire from this limited pool is intense, and we may be unable to hire, train, retain, or motivate these key personnel on acceptable terms given the competition among
numerous pharmaceutical and biotechnology companies for similar personnel. We also experience competition for the hiring of scientific and clinical personnel from universities and
research institutions. In addition, we rely on consultants and advisors, including scientific and clinical advisors, to assist us in formulating our research and development and
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consultants and advisors may be employed by employers other than us and may have commitments under consulting or advisory contracts with other entities that may limit their
availability to us. If we are unable to continue to attract and retain high quality personnel, our ability to pursue our growth strategy will be limited.

Risks Related to Sales, Marketing, and Competition

We face substantial competition, which may result in others discovering, developing, or commercializing products before or more successfully than we do.

The development and commercialization of new pharmaceutical and biotechnology products is highly competitive. We face competition with respect to our approved drug and

current clinical-stage drug candidates and will face competition with respect to any drugs and drug candidates that we may seek to develop or commercialize in the future, from
major pharmaceutical companies, specialty pharmaceutical companies, and biotechnology companies worldwide. There are a number of large pharmaceutical and biotechnology
companies that currently market and sell products or are pursuing the development of products for the treatment of the disease indications for which we are developing our drug
candidates and commercializing our approved drug. Some of these competitive products and therapies are based on scientific approaches that are similar to our approach, and others
are based on entirely different approaches. Potential competitors also include academic institutions, government agencies, and other public and private research organizations that
conduct research, seek patent protection, and establish collaborative arrangements for research, development, manufacturing, and commercialization.

Specifically, there are a large number of pharmaceutical and biotechnology companies developing or marketing treatments for cancer that would be competitive with

QINLOCK and the drug candidates we are developing, if such drug candidates are approved. Many of these companies are developing cancer therapeutics that are also kinase
inhibitors. Although there are currently marketed drugs that have activity in GIST through their targeting of primary and secondary KIT mutants, other than avapritinib for GIST
PDGFRA exon 18 mutations only, no currently marketed drug directly targets certain secondary resistance mutations in KIT and PDGFRA, and no currently marketed drug provides
coverage of all KIT and PDGFRA mutants. With respect to QINLOCK, there are a number of large pharmaceutical companies and biotechnology companies marketing small
molecule drugs or biologic drugs for the treatment of GIST, including Blueprint, Novartis, Pfizer, and Bayer. We are also aware of pharmaceutical and biotechnology companies
developing drugs for the treatment of GIST including ABS, Arog, CTTPG, Cogent, Daiichi, Exelixis, Immunicum, Jiangsu, Merck, NTKMT, Novartis, Taiho, Theseus, and Xencor.
Several of these programs are in clinical studies, including but not limited to Arog, CTTPG, Cogent, Immunicum, Jiangsu, NTKMT, and Theseus. Further, there are numerous
companies marketing or developing antibodies and small molecules targeting CSF1R inhibitors for TGCT that we are seeking to target with our vimseltinib program, including
Abbisko, AmMax, Daiichi, SynOx, and HutchMed. These programs are also in clinical studies for TGCT. In addition, pexidartinib is the only FDA approved product, which is
indicated for the treatment of adult patients with symptomatic TGCT associated with severe morbidity or functional limitations and not amenable to improvement with surgery. With
respect to DCC-3116, an ULK inhibitor designed to address mutant RAS and RAF cancers that entered a Phase 1 clinical study in the second quarter of 2021, we are aware of other
companies that are advancing programs targeting ULK, including Endeavor Biomedicines, Inc. and Erasca, Inc.

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 approved for broader indications or patient populations, are approved for specific sub-populations, are more convenient, or are less expensive than QINLOCK or any
other products that we may develop. Our competitors also may obtain FDA, EMA, or other marketing approval for their products more rapidly than any approval we may obtain for
ours, which could result in our competitors establishing a strong market position before we are able to enter the market. In addition, our ability to compete may be affected in many
cases by insurers or other third-party payors seeking to encourage the use of generic products.

Generic products are currently on the market for some of the indications that we are pursuing, and additional products are expected to become available on a generic basis over

the coming years. We expect that QINLOCK, and any of our drug candidates that achieve marketing approval, will be priced at a significant premium over any competitive generic
products.

Many of the companies against which we are competing or against which we may compete in the future have significantly greater financial resources and expertise in research
and development, manufacturing, preclinical testing, conducting clinical trials, obtaining marketing approvals, and marketing and selling approved products than we do. Mergers and
acquisitions in the pharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. Smaller and other
early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These third parties
compete with us in recruiting and retaining

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qualified scientific, management, and sales and marketing personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies
complementary to, or necessary for, our programs.

The incidence and prevalence for target patient populations of our approved drug and drug candidates have not been established with precision. If the market opportunities for
our approved drug or drug candidates are smaller than we estimate or if any approval that we obtain is based on a narrower definition of the patient population, our revenue
potential and ability to achieve profitability will be adversely affected.

The precise incidence and prevalence for GIST, TGCT, specific mutant RAS and RAF cancers, and other indications we are exploring, are unknown. Our projections of both
the number of people who have these diseases, as well as the subset of people with these diseases who have the potential to benefit from treatment with our drug or drug candidates,
are based on estimates, which are inherently uncertain.

The total addressable market opportunity for QINLOCK, vimseltinib, and DCC-3116, and any other drug candidates we may produce will ultimately depend upon, among

other things, the diagnosis criteria included in the final label for our current and future drugs for sale for these indications, acceptance by the medical community and patient access,
drug pricing, and reimbursement. The number of patients in our targeted commercial markets and elsewhere may turn out to be lower than expected, patients may not be otherwise
amenable to treatment with our drug, or new patients may become increasingly difficult to identify or gain access to, all of which would adversely affect our results of operations and
our business.

The commercial success of QINLOCK, and of any future approved drugs, such as vimseltinib or DCC-3116, if approved, will depend upon the degree of market acceptance by
physicians, patients, third-party payors, and others in the medical community.

The commercial success of QINLOCK, and of any future approved drugs, such as vimseltinib or DCC-3116, if approved, will depend in part on market acceptance by

physicians, patients, third-party payors, and others in the medical community. For example, current cancer treatments, such as surgery, existing targeted therapies, chemotherapy, and
radiation therapy, are well established in the medical community, and doctors may continue to rely on these treatments. If QINLOCK and any future approved drugs, such as
vimseltinib or DCC-3116, if approved, do not achieve and maintain an adequate level of acceptance, we may not generate significant product revenues and we may not become
profitable. The degree of market acceptance of QINLOCK and of any current drug candidates, such as vimseltinib and DCC-3116, or future drug candidates, if approved for
commercial sale, will depend on a number of factors, including:

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the availability, perceived advantages, and relative cost, safety, and efficacy of alternative and competing treatments;

the prevalence and severity of any side effects, adverse reactions, misuse, or any unfavorable publicity in these areas, in particular compared to alternative treatments;

our ability (and the ability of our partners) to offer our products for sale at competitive prices;

the convenience and ease of administration compared to alternative treatments;

the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies;

the strength and effectiveness of our marketing, sales, and distribution strategy and efforts, including, without limitation, our own and that of our licensees and
distributors, and the degree to which the approved labeling supports promotional initiatives for commercial success;

the existence of distribution and/or use restrictions, such as through a REMS;

the availability and timeliness of third-party payor coverage and adequate reimbursement;

the inability of patients to afford the out-of-pocket costs of their drug therapy based on their insurance coverage and/or benefit design;

the timing of any marketing approval in relation to other product approvals;

support from patient advocacy groups;

• maintaining an acceptable safety profile of our approved drug and drug candidates following approval;

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the labeling of our products, including any significant use or distribution restrictions or safety warnings;

any restrictions on the use of our products together with other medications; and

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•

the foregoing factors as they apply to any combination drug for which a drug candidate of ours, such as DCC-3116, may be approved to be prescribed with as part of a
combination therapy.

Even if a potential drug displays a favorable efficacy and safety profile in preclinical and clinical studies, market acceptance of the drug will not be known until after it is
launched. Our efforts to educate the medical community and third-party payors on the benefits of our drug may require significant resources and may never be successful. Our efforts
to educate the marketplace may require more resources than are required by the therapies marketed by our competitors. Any of these factors may cause QINLOCK, or any future
approved drugs, such as vimseltinib or DCC-3116, if approved, to be unsuccessful or less successful than anticipated.

Our failure to obtain additional marketing approvals in other foreign jurisdictions would prevent QINLOCK and our drug candidates from being marketed more extensively
internationally, and any approval we are granted for QINLOCK or our drug candidates in the U.S. or key European markets would not assure approval of QINLOCK or our
drug candidates in other foreign jurisdictions.

Following the FDA approval of QINLOCK in May 2020, we commenced commercial sales of QINLOCK in the U.S. In addition, our partner, Zai, obtained regulatory
approval to market QINLOCK in the PRC and Hong Kong in March 2021 and Taiwan in September 2021. Following EC approval in November 2021, we launched QINLOCK in
Germany. In order to market and sell QINLOCK, or any future products in other jurisdictions, we or our partners must obtain separate marketing approvals in applicable foreign
jurisdictions and comply with numerous and varying regulatory requirements. The approval procedure varies among countries and can involve additional testing as well as additional
information and filings. The time required to obtain approval may differ substantially from that required to obtain FDA approval. The regulatory approval process outside the U.S.
generally includes all of the risks associated with obtaining FDA approval. In addition, in many countries outside the U.S., it is required that the product be approved for
reimbursement before the product can be approved for sale in that country. We may not (and/or our partners, as applicable, may not) obtain approvals from regulatory authorities
outside the U.S. on a timely basis, if at all, or may not be successful in seeking and obtaining favorable local reimbursement and pricing approvals, particularly in light of the impact
of COVID-19 on the global economy. Approval by the FDA does not ensure approval by regulatory authorities in other countries or jurisdictions, and approval by one regulatory
authority outside the U.S. does not ensure approval by regulatory authorities in other countries or jurisdictions or by the FDA. Except for QINLOCK in select countries where we
have received approval, we, or our partners, may not be able to file for marketing approvals and may not receive necessary approvals to commercialize our products in any market
outside the U.S.

QINLOCK and any drug candidate for which we obtain marketing approval will be subject to ongoing enforcement of post-marketing requirements and we could be subject to
substantial penalties, including withdrawal of QINLOCK or any future approved product from the market, if we fail to comply with all regulatory requirements. In addition, the
terms of the marketing approval of QINLOCK, and any future approved products, and ongoing regulation of our products, may limit how we manufacture and market our
products and compliance with such requirements may involve substantial resources, which could materially impair our ability to generate revenue.

QINLOCK and any drug candidate for which we obtain marketing approval, along with the manufacturing processes, post-approval clinical data, labeling, advertising, and
promotional activities for such products, will be subject to continual requirements of and review by the FDA and other regulatory authorities. These requirements include, but are not
limited to, restrictions governing promotion of an approved product, submissions of safety and other post-marketing information and reports, registration and listing requirements,
cGMP requirements relating to manufacturing, quality control, quality assurance and corresponding maintenance of records and documents, and requirements regarding drug
distribution and the distribution of samples to physicians and recordkeeping.

The FDA and other federal and state agencies, including the Department of Justice, closely regulate compliance with all requirements governing prescription drug products,

including requirements pertaining to marketing and promotion of drugs in accordance with the provisions of the approved labeling and manufacturing of products in accordance with
cGMP requirements. Violations of such requirements may lead to investigations alleging violations of the FDCA and other statutes, including the FCA and other federal and state
healthcare fraud and abuse laws as well as state consumer protection laws. Our failure to comply with all regulatory requirements, and later discovery of previously unknown adverse
events or other problems with our products, manufacturers, or manufacturing processes, may yield various results, including:

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litigation involving patients taking our products;

restrictions on such products, manufacturers, or manufacturing processes;

restrictions on the labeling or marketing of a product;

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restrictions on product distribution or use;

requirements to conduct post-marketing studies or clinical trials;

• warning or untitled letters;

• withdrawal of the products from the market;

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refusal to approve pending applications or supplements to approved applications that we submit;

voluntary recall of products;

fines, restitution, or disgorgement of profits or revenues;

suspension or withdrawal of marketing approvals;

damage to relationships with any potential collaborators;

unfavorable press coverage and damage to our reputation;

refusal to permit the import or export of our products;

product seizure; or

injunctions or the imposition of civil or criminal penalties.

Non-compliance by us or any future collaborator with regulatory requirements, including safety monitoring or pharmacovigilance, and with requirements related to the
development of products for the pediatric population can also result in significant financial penalties. Similarly, failure to comply with applicable regulatory requirements regarding
the protection of personal information can also lead to significant penalties and sanctions.

In addition, we and our contract manufacturers will continue to expend time, money, and effort in all areas of regulatory compliance, including manufacturing, production,
product surveillance, and quality control. For certain commercial prescription drug products, manufacturers and other parties involved in the supply chain must also meet chain of
distribution requirements and build electronic, interoperable systems for product tracking and tracing and for notifying the FDA of counterfeit, diverted, stolen, and intentionally
adulterated products or other products that are otherwise unfit for distribution in the U.S. If we are not able to comply with post-approval regulatory requirements, we could have the
marketing approvals for QINLOCK or any future approved products withdrawn by regulatory authorities and our ability to market QINLOCK or any future approved products could
be limited, which could adversely affect our ability to achieve or sustain profitability. As a result, the cost of compliance with post-approval regulations may have a negative effect on
our operating results and financial condition.

If we and/or our partners are unable to maintain and further develop sales and marketing capabilities, we or our partners may not be successful in commercializing QINLOCK,
or any of our drug candidates if and when they are approved, and we may not be able to generate sufficient revenues to result in a profit.

We have only recently established our sales and marketing infrastructure in the U.S. and in key European markets, and currently have only limited experience in the sale,
marketing, or distribution of biopharmaceutical products. To achieve commercial success for QINLOCK or any other product for which we obtain marketing approval, we will need
to successfully maintain and expand our sales, marketing, and distribution capabilities, either ourselves or through collaboration, licensing, distribution, or other arrangements with
third parties. In addition, our licensee for QINLOCK for Greater China is building a sales and marketing infrastructure but currently has limited experience in sales, marketing, and
distribution of a commercial product. Given our focus on Germany and France, we plan to provide access to QINLOCK in additional European countries through other channels.

We have built our own focused, specialized sales and marketing organization in the U.S. and commercial capabilities in key European markets. In addition to our existing
QINLOCK license to Zai for Greater China, we have executed, and intend to seek additional, distribution arrangements in select geographies where we choose not to establish a sales
presence to support the commercialization of QINLOCK or our drug candidates for which we obtain marketing approval and that can be commercialized through such arrangements.

There are risks involved with establishing our own sales and marketing capabilities. For example, recruiting, training and motivating a sales force is expensive and time-
consuming and could delay any product launch. We will need to commit significant management and other resources to maintain our commercial organization. We may not be able to
achieve the necessary development and growth in a cost-effective manner or realize a positive return on our investment. We will also have to compete with other companies to
recruit, hire, train, and retain sales and marketing personnel. We cannot be sure that we will be

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able to recruit, hire, train, and retain a sufficient number of sales representatives or that they will be effective at promoting QINLOCK or any future approved drugs.

Factors that may inhibit our efforts to commercialize QINLOCK or any future approved products on our own include:

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our inability to recruit, hire, train, and retain adequate numbers of effective sales and marketing personnel;

our inability to raise financing necessary to maintain and grow our commercialization infrastructure;

the inability of sales personnel to obtain access to physicians or educate physicians about the benefits, safety, and effectiveness of QINLOCK or any future approved
products, in particular in light of reduced in-person access to medical institutions and personnel in some areas and other significant disruptions to the healthcare system
and community due to COVID-19;

the lack of complementary products to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies with more extensive product
lines; and

unforeseen costs and expenses associated with creating an independent sales and marketing organization.

Our product revenues and profitability, if any, are likely to be lower as a result of any partnerships we choose to enter into in markets outside of the U.S. or key European

markets than if we were to market and sell the products ourselves in those markets. In addition, we may not be successful in entering into arrangements with third parties to market
and sell QINLOCK or any future approved products or may be unable to do so on terms that are acceptable to us. We likely will have little control over such third parties, and any of
these third parties may fail to devote the necessary resources and attention to develop (as necessary in the relevant jurisdiction), sell, and market QINLOCK or any future approved
products effectively. If we do not maintain and expand our sales and marketing capabilities successfully, either on our own or in collaboration with third parties, we will not be
successful in commercializing QINLOCK or any of our drug candidates for which we may receive marketing approval. In the event that we are unable to effectively deploy our sales
organization or distribution strategy on a timely and efficient basis, if at all, the commercialization of QINLOCK and our drug candidates, if approved, could be delayed which would
negatively impact our ability to generate product revenues.

Other Risks Related to Our Business

Our business could be negatively affected by cyber security threats.

A cyberattack or similar incident could occur and result in information theft, data corruption, operational disruption, damage to our reputation, or financial loss. We are
increasingly dependent on information technology systems and infrastructure, including mobile technologies, to operate our business. In the ordinary course of our business, we use
our data centers and our networks to store and access confidential and proprietary business information. Our technologies, systems, networks, or other proprietary information, and
those of our vendors, suppliers and other business partners, may become the target of cyberattacks or information security breaches that could result in the unauthorized release,
gathering, monitoring, misuse, loss, or destruction of proprietary and other information, or could otherwise lead to the disruption of our business operations. Cyberattacks are
becoming more sophisticated and certain cyber incidents, such as surveillance, may remain undetected for an extended period and could lead to disruptions in critical systems or the
unauthorized release of confidential or otherwise protected information. These events could lead to financial loss from remedial actions, loss of business, disruption of operations,
damage to our reputation, or potential liability. Our systems and insurance coverage for protecting against cybersecurity risks may not be sufficient. Further, as cyberattacks continue
to evolve, we may be required to expend significant additional resources to continue to modify or enhance our protective measures or to investigate and remediate any vulnerability
to cyberattacks.

We are increasingly dependent on critical, complex, and interdependent information technology (IT) systems and data to operate our business. Any failure, inadequacy,
interruption, or security lapse of that technology, including security attacks, incidents, and/or breaches, could harm our ability to operate our business effectively.

We have outsourced significant parts of our IT and business infrastructure to third-party providers, and we currently use these providers to perform business critical IT services

for us. We are therefore vulnerable to cybersecurity attacks and incidents on the associated networks and systems, whether they are managed by us directly or by the third-parties
with whom we contract, and we have experienced and may in the future experience such cybersecurity threats and attacks. In the context of the COVID-19 pandemic, the risk of such
threats and attacks has increased, as virtual and remote working has become more widely used, and sensitive data is accessed by employees working in less secure, home-based
environments. Although the pandemic has shifted during the past few months, the way we work is still largely remote in most aspects of the business and we will continue to factor
this into our cybersecurity risk management strategy. In addition, due to our reliance on third-party providers, we have

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experienced and may in the future experience interruptions, delays, or outages related to IT service availability due to a variety of factors outside of our control, including technical
failures, natural disasters, fraud, or security attacks experienced by or caused by these third-party providers. Interruptions in the service provided by these third-party providers could
affect our ability to perform critical tasks.

As a global pharmaceutical company, our systems are subject to frequent cyber-attacks. Due to the nature of some of these attacks, there is a risk that they may remain
undetected for a period of time. While we have invested in the protection of data and information technology, our efforts may not prevent service interruptions or security breaches
(e.g., ransomware attacks). Any such interruption or breach of our systems could adversely affect our business operations and/or result in the loss of critical or sensitive confidential
information or intellectual property, and could result in financial, legal, business, and reputational harm to us. We maintain cyber liability insurance; however, this insurance may not
be sufficient to cover the financial, legal, business, or reputational losses that may result from an interruption or breach of our systems.

Despite the implementation of security technical and organizational measures, our internal computer systems and those of third parties with which we contract are vulnerable to

damage from security incidents, breaches, and/or attacks (e.g., ransomware, computer viruses, worms, and other destructive or disruptive software), unauthorized access, natural
disasters, terrorism, war, and telecommunication and electrical failures. System failures, accidents, or security attacks and/or breaches of our systems could result in operational
interruptions and/or a material disruption of our clinical and commercialization activities and business operations, in addition to possibly requiring substantial expenditures of
resources to remedy. The loss or compromised integrity of clinical trial data could result in delays in our regulatory approval efforts and significantly increase our costs to recover or
reproduce the data. To the extent that any systems disruptions, security incidents, or security breaches were to result in a loss of, damage to, or compromised integrity of our data or
applications, or inappropriate disclosure of confidential or proprietary information, we could incur liability and our product research, development, and commercialization efforts
could be disrupted or delayed. In addition, we may not have adequate insurance coverage to provide compensation for any losses associated with such events.

We could be subject to risks caused by misappropriation, misuse, leakage, falsification, or intentional or accidental disclosure or loss of information maintained in the

information systems and networks of our company, including personal information of our employees. In addition, outside parties may attempt to penetrate our systems or those of our
vendors or fraudulently induce our employees or employees of our vendors to disclose sensitive information in order to gain access to our data. Like other companies, we have on
occasion, and will continue to experience, threats to our data and systems, including malicious codes and viruses, and other security incidents, breaches, and attacks. The number and
complexity of these threats continue to increase over time. Although we have experienced some of the events described above, to date, they have not had a material impact on our
operations. Still, the occurrence of any of the events described above in the future could disrupt our business operations and result in enforcement actions or liability, including
potential fines and penalties, claims for damages, and shareholder litigation.

Security incidents could also include supply chain attacks which, if successful, could cause a delay in the manufacturing of our products. Our key business partners face similar

risks, and any security breach of their systems could adversely affect our security posture. In addition, our increased use of cloud technologies could heighten these and other
operational risks, and any failure by cloud technology service providers to adequately safeguard their systems and prevent cyber-attacks could disrupt our operations and result in
misappropriation, corruption, or loss of confidential or proprietary information.

In addition, as we increase our commercial activities and our brand becomes more widely known and recognized, we may become a more attractive target for malicious third
parties. If a material breach of our security or that of our third-party providers occur, the market perception of the effectiveness of our security measures could be harmed, we could
lose business, and our reputation and credibility could be damaged. We could be required to expend significant amounts of money and other resources to repair or replace
information assets and/or information systems. We could also be required to change third-party providers and/or products at significant cost. Although we develop and maintain
systems and controls designed to prevent these events from occurring, and we have a process to identify and mitigate threats, the development and maintenance of these systems,
controls, and processes is costly and requires ongoing monitoring and updating as technologies change and efforts to overcome security measures become more sophisticated.
Moreover, despite our efforts, the possibility of these events occurring cannot be eliminated entirely. Any breach of our security measures as a result of third-party action, employee
negligence and/or error, malfeasance, defects, or otherwise that compromises the confidentiality, integrity, or availability of our data could result in:

•

•

severe harm to our reputation or brand, or a material and adverse effect on the overall market perception of our technical and organizational measures to protect the
confidentiality, integrity, and availability of our information;

individual and/or class action lawsuits, which could result in financial judgments against us and which would cause us to incur legal fees and costs;

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legal or regulatory enforcement action, which could result in fines and/or penalties and which would cause us to incur legal fees and costs; and/or

additional costs associated with responding to business interruption or security incidents and/or breaches, such as investigative and remediation costs, the costs of
providing individuals and/or data owners with notice of the breach, legal fees, the costs of any additional fraud or cyber detection activities, or the costs of prolonged
system disruptions or shutdowns.

Any of these events could materially adversely impact our business and results of operations.

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

Social media is increasingly being used to communicate about our drug, clinical development programs, and the diseases our drug and drug candidates are being developed to

treat. We are utilizing what we believe is appropriate social media in connection with our commercialization efforts for QINLOCK and we intend to do the same for our future
products, if approved. Social media practices in the biopharmaceutical industry continue to evolve and regulations relating to such use are not always clear. This evolution creates
uncertainty and risk of noncompliance with regulations applicable to our business, resulting in potential regulatory actions against us. For example, patients may use social media
channels to comment on their experience in an ongoing clinical study or to report an alleged adverse event (AE). When such disclosures occur, there is a risk that we fail to monitor
and comply with applicable AE reporting obligations or we may not be able to defend our business or the public's legitimate interests in the face of the political and market pressures
generated by social media due to restrictions on what we may say about our investigational products. There is also a risk of inappropriate disclosure of sensitive information or
negative or inaccurate posts or comments about us on any social networking website. If any of these events were to occur or we otherwise fail to comply with applicable regulations,
we could incur liability, face regulatory actions, or incur other harm to our business.

The effects of enacted tax legislation and other legislative, regulatory, and administrative developments to our business are uncertain. Increased costs related to such
developments could adversely affect our financial condition and results of operations.

It cannot be predicted whether, when, in what form, or with what effective dates, tax laws, regulations, and rulings may be enacted, promulgated, or issued, which could result
in an increase in our or our shareholders' tax liability or require changes in the manner in which we operate in order to minimize or mitigate any adverse effects of changes in tax law.

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

Under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, if a corporation undergoes an “ownership change” (generally defined as a greater than 50%

change (by value) in its equity ownership over a three-year period), the corporation's ability to use its pre-change net operating loss carryforwards and other pre-change tax attributes
to offset its post-change taxable income may be limited. We may experience ownership changes in the future as a result of subsequent shifts in our stock ownership. As of
December 31, 2021, we had U.S. federal net operating loss carryforwards and U.S. federal research and development tax credit carryforwards, which could be limited if we
experience an “ownership change.”

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 harm our business.

We are subject to numerous foreign, federal, state, and local 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 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, including any available insurance.

In addition, our leasing and operation of real property may subject us to liability pursuant to certain of these laws or regulations. Under existing U.S. environmental laws and
regulations, current or previous owners or operators of real property and entities that disposed or arranged for the disposal of hazardous substances may be held strictly, jointly, and
severally liable for the cost of investigating or remediating contamination caused by hazardous substance releases, even if they did not know of and were not responsible for the
releases.

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We could incur significant costs and liabilities which may adversely affect our financial condition and operating results for failure to comply with such laws and regulations,
including, among other things, civil or criminal fines and penalties, property damage, and personal injury claims, costs associated with upgrades to our facilities or changes to our
operating procedures, or injunctions limiting or altering our operations.

Although we maintain workers' compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from the use of hazardous

materials, this insurance may not provide adequate coverage against potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be
asserted against us in connection with our storage or disposal of biological, hazardous, or radioactive materials.

In addition, we may incur substantial costs in order to comply with current or future environmental, health, and safety laws and regulations. These current or future laws and

regulations, which are becoming increasingly more stringent, may impair our research, development, or manufacturing efforts. Our failure to comply with these laws and regulations
also may result in substantial fines, penalties, or other sanctions.

We or the third parties upon whom we depend may be adversely affected by natural disasters or global health crises and our business continuity and disaster recovery plans may
not adequately protect us from a serious disaster.

Natural disasters or global health crises, including the COVID-19 pandemic, could severely disrupt our operations, and have a material adverse effect on our business, results

of operations, financial condition, and prospects. If a natural disaster, global health crisis, power outage, or other event occurred that prevented us from using all or a significant
portion of our headquarters, that damaged critical infrastructure, such as the manufacturing facilities of our third-party contract manufacturers, or that otherwise disrupted our
operations or the operations of our vendors, 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, health crisis, 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.

Risks Related to Clinical Development, Regulatory Review, and Approval of Our Drug and Drug Candidates

Risks Related to Clinical Development

Clinical drug development involves a lengthy and expensive process. We may incur additional costs or experience delays in completing, or ultimately be unable to complete, the
development and commercialization of our drug and drug candidates.

We currently have several drug candidates in varying stages of clinical development, including DCC-3116 in a Phase 1 study, in patients with advanced or metastatic tumors

with a RAS or RAF mutation, and vimseltinib in a Phase 3 study in patients with TGCT, and the risk of failure is high. We are unable to predict when or if any of our drug candidates
will prove effective or safe in humans or will obtain marketing approval. Before obtaining marketing approval from regulatory authorities for the sale of any drug candidate, we must
complete preclinical development and then conduct extensive clinical trials to demonstrate the safety and efficacy of our drug candidates in humans. Clinical testing is expensive,
difficult to design and implement, and can take many years to complete and is uncertain as to the outcome. A failure of one or more clinical trials can occur at any stage of testing.
The outcome of preclinical testing and early clinical trials may not be predictive of the success of later clinical trials, interim or preliminary results of a clinical trial do not
necessarily predict final results, and results for one indication may not be predictive of the success in additional indications. In particular, the small number of patients in our early
clinical trials may make the results of these trials less predictive of the outcome of later clinical trials. For example, in November 2021, we announced that the INTRIGUE study did
not meet the primary endpoint of improved PFS compared with the standard of care sunitinib despite initially observing encouraging preliminary data in our Phase 1 study of
QINLOCK in second-line GIST. In addition, although we observed encouraging preliminary efficacy results including ORR (best response) in our Phase 1/2 study of vimseltinib in
TGCT, the assessments of efficacy from the Phase 1/2 study of vimseltinib were not designed to demonstrate statistical significance and may not be predictive of the results of further
clinical trials of vimseltinib, including our ongoing Phase 3 MOTION study for vimseltinib. These factors also apply to the earlier-stage trials for our drug candidates, such as the
Phase 1 study of DCC-3116.

We may experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent our ability to obtain marketing approval or commercialize

our drug or drug candidates, including:

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regulators may not authorize us to commence or continue a clinical trial or may impose a clinical hold or may limit the conduct of a clinical trial through the imposition of
a partial clinical hold;

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institutional review boards (IRBs) may not authorize us or our investigators to commence or continue a clinical trial at a prospective trial site or an IRB may not approve a
protocol amendment to an ongoing clinical trial;

• we may experience delays in reaching, or fail to reach, agreement on acceptable clinical trial contracts or clinical trial protocols with prospective trial sites;

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

the number of patients required for clinical trials for our drug candidates may be larger than we anticipate, enrollment in these clinical trials may be slower than we
anticipate, participants may drop out of these clinical trials at a higher rate than we anticipate, or the duration of these clinical trials may be longer than we anticipate,
particularly in light of the COVID-19 pandemic;

our third-party contractors, including investigators, may fail to meet their contractual obligations to us in a timely manner, or at all, due to interruptions to their business,
including those impacts caused by the COVID-19 pandemic, or may fail to comply with regulatory requirements;

• we may have to suspend, change, or terminate clinical trials for various reasons, including a finding that the participants are being exposed to unacceptable health risks,

including potential exposure to COVID-19 in their geography;

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our drug or drug candidates may have undesirable side effects or other unexpected characteristics, causing us or our investigators, regulators, or IRBs to suspend, change,
or terminate the trials;

unforeseen global instability, including political instability or instability from an outbreak of pandemic or contagious disease, such as COVID-19, in or around the
countries in which we conduct our clinical trials or where our third-party contractors operate, could delay the commencement or rate of completion of our clinical trials, or
those that may be conducted in Greater China under our collaboration with Zai;

the cost of clinical trials for our drug or drug candidates may be greater than we anticipate, particularly in light of the uncertainties associated with the outbreak of
COVID-19; and

the supply or quality of our drug or drug candidates or other materials necessary to conduct clinical trials may be insufficient or inadequate and result in delays or
suspension of our clinical trials, including those caused by the COVID-19 pandemic.

While we designed QINLOCK to inhibit the full spectrum of the known mutant or amplified KIT and PDGFRA kinases that drive cancers such as GIST, we may find that

patients treated with QINLOCK have or develop mutations that confer resistance to treatment. We are aware of a secondary mutation in PDGFRA, in a patient not treated with
QINLOCK, where the potency of inhibition determined in in vitro assays by QINLOCK suggests that this mutation may confer resistance to QINLOCK in patients. We may identify
additional mutations in PDGFRA or mutations in KIT that are resistant to QINLOCK. If patients have or develop resistance to treatment with our approved drug or drug candidates,
we may be unable to successfully complete our clinical trials, and may not be able to obtain regulatory approval.

Our product development costs will increase if we experience delays in preclinical studies or clinical trials or in obtaining marketing approvals. We do not know whether any

of our planned preclinical studies or clinical trials will begin on a timely basis or at all, will need to be restructured, or will be completed on schedule, or at all. Our ongoing trials
continue to generate additional data that may be requested by the FDA or other regulatory agencies. The FDA may request additional information or data or require us to conduct
additional preclinical studies or clinical trials or to change our development plans and any such requests or requirements could result in development delays. Furthermore, the FDA
could place a clinical hold, either another partial clinical hold or a full clinical hold, on our trials if they are not satisfied with the information we provide to them, which could result
in delays for the trial. Significant preclinical study or clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize our drug
candidates or allow our competitors to bring products to market before we do and impair our ability to successfully commercialize our drug candidates and may harm our business
and results of operations.

We may utilize companion diagnostics in our planned clinical trials in the future in order to identify appropriate patient populations. If a satisfactory companion diagnostic is

not commercially available, we may be required to create or obtain one that would be subject to regulatory approval requirements. The process of obtaining or creating such
diagnostic is time consuming and costly.

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If we experience delays or difficulties in the enrollment of patients in clinical trials, including in our clinical trials of vimseltinib or DCC-3116, our receipt of necessary
marketing approvals could be delayed or prevented.

We may not be able to continue clinical trials for our drug or drug candidates if we are unable to locate and enroll a sufficient number of eligible patients to participate in these
trials as required by the FDA or similar regulatory authorities outside of the U.S., or our clinical trials may be delayed if enrollment is slowed or paused due to health considerations,
access restrictions, or disruptions and shortages in the global supply chain resulting from COVID-19 or other factors.

In addition, some of our competitors have ongoing, or planned, clinical trials for drug candidates that treat the same indications as our drug or drug candidates and may
simultaneously cover the same line of therapy and/or focus on sub-populations of a line of therapy, and patients who would otherwise be eligible for our clinical trials may instead
enroll in clinical trials for our competitors' drug candidates or patients may not be eligible for our trials, which could potentially change the availability or number of patients from a
particular sub-population. Patient enrollment and/or drop-out rate is affected by other factors including:

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the severity of the disease under investigation;

the eligibility criteria for the trial in question;

the perceived risks and benefits of the drugs or drug candidates under study;

the efforts to facilitate timely enrollment in clinical trials;

the patient referral practices of physicians;

the burden on patients due to inconvenient procedures and visits, in particular in light of considerations surrounding COVID-19;

diversion of healthcare resources as a result of COVID-19, and the availability of qualified investigators to conduct clinical trials during the COVID-19 pandemic;

the ability to monitor patients adequately during and after treatment, in particular in light of travel restrictions, access restrictions to medical institutions, and the impact of
social distancing and quarantine guidelines as a result of COVID-19; and

the proximity and availability of clinical trial sites for prospective patients, and the ability of patients to travel to study sites during the COVID-19 pandemic.

If we experience higher than expected drop-out rates for an event-driven study, as we previously experienced with our INTRIGUE study, we may choose to increase the total

number of patients in the study to strengthen the ability to achieve the pre-specified number of events. Other factors in slower than expected enrollment may include recruitment
challenges for indications that are difficult to diagnose and/or treat where the population is small and dispersed or for a chronic non life-threatening condition, such as TGCT, and
other competing trials are recruiting simultaneously. Our inability to enroll a sufficient number of patients for our clinical trials would result in significant delays and could require us
to abandon one or more clinical trials altogether. Enrollment delays in our clinical trials may result in increased development costs for our drug candidates, which would cause
significant harm to our financial position, adversely impact our stock price, and impair our ability to raise capital.

If serious adverse events or unacceptable side effects are identified during the development of our drug or drug candidates, we may need to abandon or limit such development.

If our drug or drug candidates are associated with serious adverse events or undesirable side effects in clinical trials or have characteristics that are unexpected, we may need to

abandon their development, limit development to more narrow uses or subpopulations in which the serious adverse events, undesirable side effects or other characteristics are less
prevalent, less severe, or more acceptable from a risk-benefit perspective or highlight these risks, side effects, or other characteristics in the approved product label. In pharmaceutical
development, many drugs that initially show promise in early-stage testing for treating cancer and other diseases may later be found to cause side effects that prevent further
development of the drug. Currently marketed therapies for the treatment of cancer are generally limited to some extent by their toxicity. In addition, some of our drug candidates
would be chronic therapies or be used in pediatric populations, for which safety concerns may be particularly important. Use of our drug candidates as monotherapies may also result
in adverse events consistent in nature with other marketed therapies. In addition, if used in combination with other therapies in the future, our drug or drug candidates may exacerbate
adverse events associated with the therapy as well as result in adverse events from drug-drug interaction. If serious adverse events or unexpected side effects are identified during
development, we may be required to develop a REMS to mitigate those serious safety risks, which could impose significant distribution and/or use restrictions on our drug or drug
candidates, if approved.

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We currently have no products that are approved for sale with the exception of QINLOCK. Our drug and all of our drug candidates target key interactions with kinase switch
regions to inhibit kinase activity. If we are unable to successfully develop and commercialize QINLOCK or our drug candidates, if approved, or experience significant delays in
doing so, our business will be materially harmed.

We currently have no products that are approved for sale with the exception of QINLOCK. All of our drug candidates, including vimseltinib and DCC-3116, are still in varying

stages of clinical development.

Our drug and drug candidates target key interactions with kinase switch regions to inhibit kinase activity. We discontinued an earlier drug candidate that also targeted key
interactions with kinase switch regions to inhibit kinase activity. Its development was discontinued due to strategic and competitive reasons. There can be no assurance that our
current drug candidates will achieve success in their clinical trials or obtain regulatory approval.

Our ability to generate continued product revenues will depend heavily on the successful development and commercialization of our approved drug and drug candidates, if

approved. Our success in the development of our approved drug and drug candidates will depend on several factors, including the following:

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successful completion of preclinical studies and clinical trials, including our ongoing Phase 3 study of vimseltinib;

receipt and related terms of marketing approvals from applicable regulatory authorities;

raising additional funds necessary to complete clinical development of and commercialize any current or future drug candidates for which we obtain marketing approval;

obtaining and maintaining patent, trade secret, and other intellectual property protection and regulatory exclusivity for our drug and drug candidates;

• making and maintaining timely and cost-effective arrangements with third-party manufacturers, or establishing manufacturing capabilities, for both clinical and

commercial supplies of our drug and drug candidates;

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the ability to obtain clearance or approval of companion diagnostic tests, if required, on a timely basis, or at all;

attracting additional licensees and/or collaborators or distributors with development, regulatory, and commercialization expertise; and

protecting and enforcing our rights in our intellectual property portfolio.

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 QINLOCK
or any current or future drug candidates for which we receive approval, which would materially harm our business. For example, our business was materially impacted following the
preliminary results of our ongoing Phase 3 study of QINLOCK for second-line GIST, which failed to meet its primary endpoint.

We may ultimately be unable to complete the development and commercialization of our drug candidates.

We may be required to conduct additional clinical trials or other testing of our drug or drug candidates beyond those that we currently contemplate if we are unable to

successfully complete clinical trials for our drug or drug candidates or other testing, obtain results of these trials or tests that are not positive or are only modestly positive, or if there
are safety concerns. While we plan to conduct only one pivotal Phase 3 MOTION study for vimseltinib in patients with TGCT, for a single randomized, placebo-controlled trial to
support submission to the FDA of an NDA, the trial must be well-designed, well-conducted, with a favorable risk/benefit ratio, and provide statistically persuasive efficacy findings
so compelling that a second trial would be unethical or practically impossible to repeat. In addition, certain data that we have presented to date have been generated and reviewed at
the clinical sites and are preliminary. The data may be subject to subsequent central review, and based on that review, there may be changes to these data which may not be favorable.
For example, in our ongoing Phase 1 study of QINLOCK, there were differences observed between imaging data assessed at the clinical sites in accordance with the Phase 1 protocol
and by central review, including some instances where central review's findings regarding the number of objective responses were less favorable than those previously reported.
Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that have believed their drug candidates performed
satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of their products. In addition, we, or our licensees, such as Zai in Greater
China, may be required to conduct additional clinical trials in the local region or regions where the licensees seek to commercialize our drug or drug candidates before a local
regulatory authority will approve any marketing application. These local studies may involve, among other things, exploration of the effect our drug or drug candidates may have on
a local population, which could be different than our clinical trial results or experience to date, and subject these trials and our development efforts to the risk that they do not support
regional approval.

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In addition, we may:

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be delayed in obtaining marketing approval for our drug or drug candidates;

not obtain marketing approval at all;

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

obtain approval with labeling that includes significant use or distribution restrictions or safety warnings;

be subject to additional post-marketing testing requirements; or

have the product, including QINLOCK, removed from the market after obtaining marketing approval.

Additionally, as of May 26, 2021, the FDA noted it is continuing to ensure timely reviews of applications for medical products during the COVID-19 pandemic in line with its
user fee performance goals. On July 16, 2020, the FDA noted that it is continuing to expedite oncology product development with its staff teleworking full-time. However, the FDA
may not be able to continue its current pace and review timelines could be extended.

Risks Related to the Industry

With the exception of QINLOCK, we have not received approval or authorization to market any of our drug candidates from regulatory authorities in any jurisdiction. Even if
we complete the necessary clinical trials, the marketing approval process is expensive, time-consuming, and uncertain, which may prevent us from obtaining approvals for the
commercialization of some or all of our drug candidates or expand our marketing for QINLOCK in additional geographies. If we are not able to obtain, or if there are delays in
obtaining, required regulatory approvals for our drug candidates, or if we experience a delay in drug supply, we will not be able to commercialize our drug candidates, and our
ability to generate revenue will be materially impaired.

Our drug candidates and the activities associated with their development and commercialization, including their design, testing, manufacture, safety, efficacy, recordkeeping,

labeling, storage, approval, advertising, promotion, sale, and distribution are subject to comprehensive regulation by the FDA and other regulatory agencies in the U.S., the EMA and
national competent authorities of the Member States in the EU, and China's NMPA and similar regulatory authorities outside the U.S. Failure to obtain marketing approval for a drug
candidate will prevent us from commercializing the drug candidate. Our drug candidates are in the varying stages of clinical development and are subject to the risks of failure
inherent in drug development. We have only received marketing authorization for QINLOCK in the U.S., Europe, and other select jurisdictions, and have not received marketing
authorization for any of our drug candidates from regulatory authorities in any jurisdiction. We have only limited experience in conducting and managing clinical trials, and in
submitting and supporting the applications necessary to seek marketing approvals and expect to rely on third-party contract research organizations (CROs) to assist us in this process.
Securing marketing approval requires the submission of extensive nonclinical and clinical data and supporting information to regulatory authorities for each therapeutic indication to
establish the drug candidate's safety and efficacy. Securing marketing approval also requires the submission of information about the product manufacturing process to, and
inspection of manufacturing facilities by, the regulatory authorities. Our drug candidates may not be effective, may be only moderately effective, or may prove to have undesirable or
unintended side effects, toxicities, or other characteristics that may preclude our obtaining marketing approval or prevent or limit commercial use.

The process of obtaining marketing approvals, both in the U.S. and internationally, is expensive, may take many years if additional clinical trials are required, if approval is

obtained at all, and can vary substantially based upon a variety of factors, including the type, complexity, and novelty of the drug candidates involved. Further, changes in marketing
approval policies during the development period, changes in or the enactment of additional statutes or regulations, or changes in regulatory review for each submitted product
application, may cause delays in the approval or rejection of an application. Regulatory authorities have substantial discretion in the approval process and may refuse to accept any
application or may decide that our data are insufficient for approval and require additional nonclinical, clinical, or other studies. In addition, varying interpretations of the data
obtained from nonclinical and clinical testing could delay, limit, or prevent marketing approval of a drug candidate. Any marketing approval we ultimately obtain may be limited or
subject to restrictions or post-approval commitments that render the approved product not commercially viable. If we experience delays in obtaining approval or if we fail to obtain
approval of our drug candidates or expand the approval for QINLOCK in additional geographies, the commercial prospects for our drug or drug candidates may be harmed and our
ability to generate further revenues will be materially impaired.

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We may not be able to obtain or, if granted, retain orphan drug exclusivity for our drug or drug candidates.

Regulatory authorities in some jurisdictions, including the U.S. and Europe, may in response to a request from the sponsor designate drugs for relatively small patient
populations as orphan drugs. Under the Orphan Drug Act, the FDA may designate a product as an orphan drug if it is a drug intended to treat a rare disease or condition, which is
generally defined as a patient population of fewer than 200,000 individuals annually in the U.S. For example, we have received orphan drug designation for ripretinib for the
treatment of GIST in the U.S. In the EU, a medicinal product may be designated as orphan if (1) it is intended for the diagnosis, prevention or treatment of a life-threatening or
chronically debilitating condition; (2) either (i) such condition affects no more than five in 10,000 persons in the EU when the application is made, or (ii) it is unlikely that the
product, without the benefits derived from orphan status, would generate sufficient return in the EU to justify the necessary investment in its development; and (3) there exists no
satisfactory method of diagnosis, prevention or treatment of such condition authorized for marketing in the EU, or if such a method exists, the product will be of significant benefit to
those affected by the condition, as defined in Regulation (EC) 847/2000.

Generally, if a product with an orphan drug designation subsequently receives the first marketing approval for the indication for which it has such designation, the product is

entitled to a period of marketing exclusivity, which precludes the approval of another marketing application for the same drug for the same indication for that time period. The
applicable period is seven years in the U.S. and ten years in the EU. Orphan drug exclusivity may be lost if the FDA or the EMA 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. In addition, the FDA can
subsequently approve a marketing application for the same drug, or a product with the same active moiety, for treatment of the same disease or condition if it concludes that the later
drug is clinically superior in that it is shown to be safer, more effective or makes a major contribution to patient care. Similarly, the EMA may grant a marketing authorization to a
similar medicinal product for the same indication as an authorized orphan product at any time if it is established that the second product, although similar, is safer, more effective or
otherwise clinically superior to the authorized product. The FDA and EMA also can approve a different drug for the same orphan indication, or the same drug for a different
indication, during the orphan exclusivity period.

On August 3, 2017, the Congress passed the FDA Reauthorization Act of 2017 (the FDARA). The FDARA, among other things, codified the FDA's preexisting regulatory
interpretation, to require that a drug sponsor demonstrate the clinical superiority of an orphan drug that is otherwise the same as a previously approved drug for the same rare disease
in order to receive orphan drug exclusivity. The law reverses prior precedent holding that the Orphan Drug Act unambiguously requires that the FDA recognize the orphan
exclusivity period regardless of a showing of clinical superiority. Moreover, in the Consolidated Appropriations Act of 2021, Congress did not further change this interpretation when
it clarified that the interpretation codified in the FDARA would apply in cases where FDA issued an orphan designation before the enactment of the FDARA but where product
approval came after the enactment of the FDARA. The FDA may further reevaluate the Orphan Drug Act and its regulations and policies. We do not know if, when, or how the FDA
may change the orphan drug regulations and policies in the future, and it is uncertain how any changes might affect our business. Depending on what changes the FDA may make to
its orphan drug regulations and policies, our business could be adversely impacted.

Even if we obtain orphan drug exclusivity for a product's use in a specific indication, that exclusivity may not effectively protect the product from competition.

Interim, “top-line” and preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become available, may be
interpreted differently if additional data are disclosed, and are subject to audit and verification procedures that could result in material changes in the final data.

From time to time, we may publicly disclose preliminary or “top-line” data from our clinical trials, which may be based on a preliminary analysis of then-available data in a

summary or “top-line” format, and the results and related findings may change as more patient data become available, may be interpreted differently if additional data are disclosed
at a later time and are subject to audit and verification procedures that could result in material changes in the final data. If additional results from our clinical trials are not viewed
favorably, our ability to obtain approval for and commercialize our approved drug and drug candidates, our business, operating results, prospects, or financial condition may be
harmed and our stock price may decrease.

We also make assumptions, estimates, calculations, and conclusions as part of our analyses of data, and we may not have received or had the opportunity to fully and carefully

evaluate all data. As a result, the preliminary or “top-line” results that we report may differ from future results of the same trials, or different conclusions or considerations may
qualify such results, once additional data have been disclosed and/or are received and fully evaluated. Such data also remain subject to audit and verification procedures that may
result in the final data being materially different from the preliminary data we previously published. As a result, preliminary and “top-line” data should be viewed with caution until
the final data are available. We may also disclose

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interim data from our clinical trials. Interim data from clinical trials that we may complete are subject to the risk that one or more of the clinical outcomes may materially change as
patient enrollment continues and more patient data become available. Adverse differences between preliminary or interim data and final data could significantly harm our business
prospects.

Further, others, including regulatory agencies, may not accept or agree with our assumptions, estimates, calculations, conclusions, or analyses or may interpret or weigh the
importance of data differently, which could impact the value of the particular program, the approvability or commercialization of the particular drug candidate or product, and our
business in general. In addition, in regards to the information we publicly disclose regarding a particular study or clinical trial, such as “top-line” data, you or others may not agree
with what we determine is the material or otherwise appropriate information to include in such disclosure, and any information we determine not to disclose – or to disclose at a later
date, such as at a medical meeting—may ultimately be deemed significant with respect to future decisions, conclusions, views, activities, or otherwise regarding a particular drug,
drug candidate, or our business. If the “top-line” data that we report differ from actual results or are interpreted differently once additional data are disclosed at a later date, or if
others, including regulatory authorities, disagree with the conclusions reached, our ability to obtain approval for and commercialize our drug candidates, our business, operating
results, prospects, or financial condition may be harmed or our stock price may decline.

If we are unable to successfully develop companion diagnostic tests for our drug candidates that require such tests, or experience significant delays in doing so, we may not
realize the full commercial potential of these drug candidates.

We may develop, either by ourselves or with collaborators, in vitro companion diagnostic tests for our drug candidates for certain indications. To be successful, we or our

collaborators will need to address a number of scientific, technical, regulatory, and logistical challenges. The FDA regulates in vitro companion diagnostics as medical devices that
will likely be subject to clinical trials in conjunction with the clinical trials for our drug candidates, and which will require regulatory clearance or approval prior to
commercialization. We may rely on third parties for the design, development, and manufacture of companion diagnostic tests for our therapeutic drug candidates that require such
tests. If these parties are unable to successfully develop companion diagnostics for these therapeutic drug candidates, or experience delays in doing so, the development of these
therapeutic drug candidates may be adversely affected, these therapeutic drug candidates may not obtain marketing approval, and we may not realize the full commercial potential of
any of these therapeutics that obtain marketing approval. As a result, our business, results of operations, and financial condition could be materially harmed.

The failure to obtain required regulatory clearances or approvals for any companion diagnostic tests that we may pursue may prevent or delay approval of any of our drug
candidates. Moreover, the commercial success of any of our drug candidates that require a companion diagnostic will be tied to the receipt of any required regulatory clearances
or approvals and the continued availability of such tests.

In connection with the clinical development of our drug candidates for certain indications, we may work with collaborators to develop or obtain access to in vitro companion

diagnostic tests to identify appropriate patients for our drug candidates. We may rely on third parties for the development, testing, and manufacturing of these companion diagnostics,
the application for and receipt of any required regulatory clearances or approvals, and the commercial supply of these companion diagnostics. Our third-party collaborators may fail
to obtain the required regulatory clearances or approvals, which could prevent or delay approval of our drug candidates. In addition, the commercial success of any of our drug
candidates that require a companion diagnostic will be tied to and dependent upon the receipt of required regulatory clearances or approvals and the continued ability of such third
parties to make the companion diagnostic commercially available on reasonable terms in the relevant geographies.

A fast track designation by the FDA for our drug candidates may not actually lead to a faster development or regulatory review or approval process.

In November 2021, we announced that vimseltinib had been granted fast track designation by the FDA for the treatment of patients with TGCT who are not amenable to
surgery. We intend to seek fast track designation for some of our other drug candidates. If a drug is intended for the treatment of a serious or life-threatening condition and the drug
demonstrates the potential to address unmet medical needs for this condition, the drug sponsor may apply for FDA fast track designation. The FDA has broad discretion whether or
not to grant this designation, so even if we believe a particular drug candidate is eligible for this designation, we cannot assure you that the FDA would decide to grant it. Even if we
do receive fast track designation, we may not experience a faster development process, review, or approval compared to conventional FDA procedures. The FDA may rescind fast
track designation if the drug candidate no longer meets the qualifying criteria for fast track designation, such as if the drug: (1) no longer demonstrates a potential to address unmet
medical need or (2) is not being studied in a manner that shows the drug can treat a serious condition and meets an unmet medical need. A drug candidate may no longer demonstrate
a potential to address an unmet medical need if a new product was approved under a traditional approval that addressed the same need or if

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emerging clinical data failed to show that the fast track designated drug candidate had the anticipated advantage over available therapy.

A Breakthrough Therapy Designation (BTD) by the FDA for our drug candidates may not lead to a faster development or regulatory review or approval process, and it does not
increase the likelihood that our drug candidates will obtain marketing approval.

We may seek a BTD for some of our drug candidates. A breakthrough therapy is defined as a drug that is intended, alone or in combination with one or more other drugs, to

treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on
one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For drugs and biologics that have been designated as
breakthrough therapies, interaction and communication between the FDA and the sponsor of the trial can help to identify the most efficient path for clinical development while
minimizing the number of patients placed in ineffective control regimens. Drugs designated as breakthrough therapies by the FDA may also be eligible for accelerated approval.

Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe one of our drug candidates meets the criteria for designation as a
breakthrough therapy, the FDA may disagree and instead determine not to make such designation. In any event, the receipt of a BTD for a drug candidate may not result in a faster
development process, review, or approval compared to drugs considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In
addition, even if one or more of our drug candidates qualify as breakthrough therapies, the FDA may later decide that the products no longer meet the conditions for qualification or
decide that the time period for the FDA review or approval will not be shortened.

Risks Related to Drug Discovery

Results of preclinical studies and early clinical trials of product candidates may not be predictive of results of later studies or trials. Our product candidates may not have
favorable results in later clinical trials, if any, or receive regulatory approval.

Preclinical and clinical drug development is expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the

preclinical study or clinical trial process. Despite promising preclinical or clinical results, any program or product candidate can unexpectedly fail at any stage of preclinical or
clinical development. The historical failure rate for programs or product candidates in our industry is high. The results from preclinical studies or early clinical trials may not be
predictive of the results from later preclinical studies or clinical trials, and interim results of a clinical trial are not necessarily indicative of final results. Product candidates in later
stages of clinical trials may fail to show the desired safety and efficacy characteristics despite having progressed through preclinical studies and initial clinical trials.

Many companies in the biopharmaceutical industry have suffered significant setbacks at later stages of development after achieving positive results in early stages of
development. Moreover, non-clinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that believed their product candidates
performed satisfactorily in preclinical studies and clinical trials nonetheless failed to obtain regulatory approval. A program may fail to result in a designated compound for many
reasons, including inability to achieve desired candidate profile properties, chemistry or patent challenges, or inconclusive or conflicting in vitro and/or in vivo studies. Designated
compounds undergoing IND-enabling studies, including animal toxicity studies, may fail at that stage. Moreover, even if an IND is filed, regulatory authorities may not clear the
candidate as safe to proceed for human studies. Even if any product candidates progress to clinical trials, these product candidates may fail to achieve clinical-proof-of-concept or
show the safety and efficacy in clinical development required to obtain regulatory approval, despite the observation of positive results in animal studies. Our or our collaborators’
failure to replicate positive results from early research programs and preclinical studies may prevent us from further developing and commercializing those or other product
candidates, which would limit our potential to generate revenues from them and harm our business and prospects.

For the foregoing reasons, we cannot be certain that any ongoing or future preclinical studies or clinical trials, including our ongoing Phase 1 study of DCC-3116 or our pan-
RAF research program, will be successful. Any safety or efficacy concerns observed in any one of our preclinical studies or clinical trials in a targeted area could limit the prospects
for regulatory approval of product candidates in that and other areas, which could have a material adverse effect on our business and prospects.

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We may expend our limited resources to pursue a particular drug candidate or indication and fail to capitalize on drug candidates or indications that may be more profitable or
for which there is a greater likelihood of success.

Because we have limited financial and managerial resources, we focus on research programs and drug candidates that we identify for specific indications. As a result, we may

forego or delay pursuit of opportunities with other drug candidates or for other indications that later prove to have greater commercial potential. Our resource allocation decisions
may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Our spending on current and future research and development programs and drug
candidates for specific indications may not yield any other commercially viable products. If we do not accurately evaluate the commercial potential or target market for a particular
drug candidate, we may relinquish valuable rights to that drug candidate through collaboration, distributor, licensing, or other royalty arrangements in cases in which it would have
been more advantageous for us to retain sole development and commercialization rights to such drug candidate.

We may not be successful in our efforts to discover additional potential drug candidates.

A key element of our strategy is to apply our proprietary knowledge and our understanding of the structure, biology, and activity of kinase inhibitors that target the switch

control mechanism to develop drug candidates. The therapeutic discovery activities that we are conducting may not be successful in identifying additional drug candidates that are
useful in treating cancer or other diseases. Our research programs may initially show promise in identifying potential drug candidates, yet fail to yield drug candidates for clinical
development for a number of reasons, including:

•

•

•

the research methodology used may not be successful in identifying potential drug candidates;

potential drug candidates may, on further study, be shown to have harmful side effects or other characteristics that indicate that they are unlikely to be drugs that will
obtain marketing approval or achieve market acceptance; or

potential drug candidates may not be effective in treating their targeted diseases.

Research programs to identify new drug candidates require substantial technical, financial, and human resources. We may choose to focus our efforts and resources on a
potential drug candidate that ultimately proves to be unsuccessful. If we are unable to identify suitable drug candidates for preclinical and clinical development, we will not be able to
obtain revenues from the sale of products in future periods, which likely would result in significant harm to our financial position and adversely impact our stock price.

Risks Related to the COVID-19 Pandemic

The current pandemic of COVID-19, including recurring surges and waves of infection, and the future outbreak of other highly infectious or contagious diseases, could
seriously harm our research, development and commercialization efforts, increase our costs and expenses and have a material adverse effect on our business, financial
condition, and results of operations.

Broad-based business or economic disruptions could adversely affect our ongoing or planned research and development and commercialization activities. For example, in

December 2019, an outbreak of a novel strain of coronavirus spread to the majority of countries around the world, including the U.S. To date, the COVID-19 pandemic has caused
significant disruptions to the U.S. and global economy and has contributed to significant volatility and negative pressure in financial markets. The global impact of the pandemic
continues to evolve as additional cases of the virus are identified, public health officials learn more about the spread of the virus and the efficacy of containment measures, new
strains of the virus that causes COVID-19 proliferate, and vaccines against the virus are developed and distributed. Many countries, including certain states and cities in the U.S.,
instituted varying levels of quarantine and social distancing requirements, restrictions on travel, mandatory closures of and/or occupancy limits for businesses, and requiring proof of
vaccination and/or negative COVID-19 test results to mitigate the spread of the virus. Although some restrictions aimed at minimizing the spread of COVID-19 have been and may
from time to time be eased or lifted in the U.S. and other countries, in response to local surges and new waves of infection, including those caused by the spread of certain variants of
the virus, some countries, states, and local governments have maintained these restrictions, or may reinstitute these restrictions from time to time, in response to rising rates of
infection.

The extent to which the COVID-19 pandemic, or the future outbreak of any other highly infectious or contagious diseases, impacts our business, including our

commercialization efforts, preclinical studies, and clinical trial operations, will depend on continuously changing circumstances, which are highly uncertain and cannot be predicted
with confidence, such as the duration of such pandemic including future waves of infection, new strains of the virus that causes COVID-19, or the impact of the increasing
availability of effective vaccines, the actions taken to contain the pandemic or mitigate its impact, and the direct and indirect economic effects of the pandemic and containment
measures, among others. The ongoing fluidity of this situation precludes any

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prediction as to the full impact of the COVID-19 pandemic, but it could have a material adverse effect on our business, financial condition, and results of operations. The COVID-19
pandemic may also have the effect of heightening many of the risks described herein, including the below:

• Our ability to successfully commercialize and generate revenue from QINLOCK may be adversely affected by the economic impact of the COVID-19 pandemic. For

example, in the U.S. we plan to utilize various programs to help patients afford our products, including patient assistance programs for eligible patients. Market disruption
caused by the COVID-19 pandemic may lead to delays in obtaining insurance coverage and reimbursement of newly approved products as well as an increase in the
numbers of uninsured patients and patients who may no longer be able to afford their co-insurance or co-pay obligations. These factors may lead to increased utilization of
our patient assistance programs, which could reduce revenues.

•

The COVID-19 pandemic may also negatively impact our commercialization strategy for QINLOCK. While restrictive safety measures are in place, limited hospital
access for non-patients, which includes our sales personnel, social distancing requirements, proof of vaccination and/or negative COVID-19 test, and other precautionary
measures due to COVID-19 may impact the ability of our sales personnel to interact in-person with customers in the same way as they did before the COVID-19
pandemic. As a result, in many circumstances we have needed to limit our interactions with physicians and payors and adapt our commercialization strategies and tactics
to a virtual model, including developing and deploying various technology-enabled platforms for virtual engagement such as remote detailing, digital and non-personal
marketing channels, and social media. Although some of these restrictions have been, and may continue to be lifted in certain healthcare institutions, the impact of prior
and continued COVID-19 related safety measures, and the potential for reimposition of restrictions due to local surges and new waves of infection, including those caused
by the spread of certain variants of the virus, may adversely affect the ability of our sales professionals to effectively market QINLOCK to physicians and the rate of
uptake for QINLOCK, which may have a negative impact on our sales and our market penetration. In addition, patient visits with physicians in specialties such as
oncology have decreased as a result of COVID-19, due to travel restrictions, social distancing requirements, prioritization of healthcare resources to address the pandemic,
and/or fear of exposure to the virus, which could have a material adverse impact on new patient starts and overall patient treatment volume.

• We are currently conducting numerous clinical studies. We believe that the COVID-19 pandemic has had, and will likely continue to have, an impact on various aspects of
our ongoing clinical trials. For example, some clinical trial sites have imposed restrictions on site visits by sponsors and CROs, the initiation of new trials, and new patient
enrollment to protect both site staff and patients from possible COVID-19 exposure and to focus medical resources on patients suffering from COVID-19. While all our
studies remain open, enrollment has slowed at some sites, some sites have, or may in the future, temporarily pause enrollment of new patients, and we have provided
guidance to all of our clinical trial sites that new patient enrollment may occur at sites where resources allow these patients to be safely enrolled and closely monitored.

• Other potential impacts of the COVID-19 pandemic on our clinical trials include difficulties associated with patient visits for screening and study conduct, and study
monitoring, which may be paused or delayed due to changes in policies at various clinical sites, federal, state, local, or foreign laws, rules, and regulations, including
closure of site access to outside monitors, quarantines, social distancing guidelines, or other travel restrictions, prioritization of healthcare resources toward pandemic
efforts, including diminished attention of physicians serving as our clinical trial investigators and reduced availability of site staff supporting the conduct of clinical trials,
heightened exposure of patients, principal investigators, and site staff to COVID-19 if a surge occurs in their geography, or other reasons related to the COVID-19
pandemic. We are working closely with our study sites and CROs to allow for utilization of remote and local assessments, such as televisits, in accordance with FDA and
EMA guidance, as well as to ensure availability of study drug for patients, but we cannot assure you these efforts will be successful or that our clinical trial activities will
not be adversely affected, delayed, or interrupted by COVID-19. Despite our efforts to address these risks, some patients and clinical investigators may not be able to
comply with clinical trial protocols if quarantines or social distancing guidelines impede movement or interrupt healthcare services or if medical resources are reallocated
to focus on patients suffering from complications related to COVID-19. If patients choose to withdraw from our studies or we choose to or are required to pause
enrollment and/or patient dosing or other clinical trial related activities in order to preserve healthcare resources, protect trial participants from being exposed to
unacceptable health risks or comply with access restrictions resulting from COVID-19, our studies and related timelines may be adversely affected. It is unknown how
long these pauses or disruptions could continue. In addition, other aspects of our clinical trials may be adversely affected, delayed, or interrupted while the COVID-19
pandemic continues or if future surges or waves of infection occur, including, for example, site initiation, patient recruitment, availability of clinical trial materials and
data analysis.

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• We currently rely on third parties to, among other things, manufacture raw materials, manufacture our product candidates for our clinical trials and our drug for

commercial sales, ship investigational and commercial drug supply for use in clinical trials or by patients, as appropriate, perform quality testing, and supply other goods
and services to run our business. Since the beginning of the COVID-19 pandemic, three vaccines for COVID-19 have received Emergency Use Authorization by the FDA
and two of those later received marketing approval. Additional vaccines may be authorized or approved in the future. If any such third parties in our supply chain for
materials are adversely impacted by restrictions resulting from the COVID-19 pandemic, including staffing shortages, production slowdowns, disruptions in delivery
systems, or the resultant demand for vaccines and potential for of their facilities be commandeered under the Defense Production Act of 1950, or equivalent foreign
legislation to produce supplies needed for COVID-19 remediation, our supply chain may be disrupted, limiting our ability to manufacture our product candidates for our
clinical trials, our research and development operations, or for commercial sale of QINLOCK.

• We have implemented precautionary measures to protect the health and safety of our employees, partners, and patients during the COVID-19 pandemic, including

instituting a vaccination requirement as part of our return-to-office plan for all of our U.S. employees as of December 1, 2021. Requests for accommodations for medical
conditions and sincerely held religious beliefs have been granted to certain of our employees consistent with applicable law. In addition, our return-to-office plan requires
adherence to onsite occupancy limits and appropriate safety measures designed to comply with federal, state, and local guidelines and allows our personnel, other than
those engaged in laboratory research activities, to work remotely as part of a flexible hybrid work model. As a result, our personnel may choose to continue to work
remotely, and this could increase our cyber security risk, create data accessibility concerns, and make us more susceptible to communication disruptions, any of which
could adversely impact our business operations or delay necessary interactions with local and federal regulators, IRBs, and ethics committees, manufacturing sites,
research or clinical trial sites, and other important agencies and contractors. Our business operations may be further disrupted if any of our employees, officers, or board
of directors contract an illness related to COVID-19 and are unable to perform their duties.

• Our employees, and employees of third-party contractors responsible for conducting research activities may have limited or reduced access to laboratories for an extended
period of time as a result of occupancy restrictions or the temporary closure of such workspaces and the possibility that governmental authorities impose or modify current
restrictions. As a result, this could delay timely completion of ongoing preclinical activities, including completion of IND-enabling studies, our ability to select future
development candidates, and initiation of additional clinical trials for our drug candidates.

• Health regulatory agencies globally may experience disruptions in their operations as a result of the evolving COVID-19 pandemic. The FDA and comparable foreign
regulatory agencies may have slower response times or be under-resourced and, as a result, review, inspection, and other timelines may be materially delayed. For
example, as of May 26, 2021, the FDA noted that it is continuing to ensure timely reviews of applications for medical products during the COVID-19 pandemic in line
with its user fee performance goals. However, it is possible that the FDA may not be able to continue its current pace and approval times could be extended, including
where a pre-approval inspection or an inspection of clinical sites is required and due to the ongoing COVID-19 pandemic and travel restrictions FDA is unable to
complete such required inspections during the review period. Since March 2020, when foreign and domestic inspections of facilities were largely placed on hold, the FDA
has been working to resume routine surveillance, bioresearch monitoring, and pre-approval inspections on a prioritized basis. In April 2021, the FDA issued guidance for
the industry formally announcing plans to employ remote interactive evaluations, using risk management methods, to meet user fee commitments and goal dates. The
FDA has developed a rating system to assist in determining when and where it is safest to conduct prioritized domestic inspections. In July 2021, the FDA began the
gradual transition into standard operational levels for domestic surveillance inspections. In November 2021, the FDA announced that it is currently developing a plan for
resuming prioritized foreign inspections, including surveillance and application-related inspections, starting in February 2022. As of September 2021, ongoing travel
restrictions and other uncertainties continue to impact oversight operations. The FDA is continuing to complete mission-critical work, prioritize other higher-tiered
inspectional needs (e.g., for-cause inspections), and carry out surveillance inspections using risk-based approaches for evaluating public health. Should the FDA
determine that an inspection is necessary for approval and an inspection cannot be completed during the review cycle due to restrictions on travel, and the FDA does not
determine a remote interactive evaluation to be adequate, the FDA has stated that it generally intends to issue a complete response letter or defer action on the application
until an inspection can be completed.During the COVID-19 public health emergency, a number of companies announced receipt of complete response letters due to the
FDA's inability to complete required inspections for their applications. Regulatory authorities outside the U.S. may adopt similar restrictions or other policy measures in
response to the COVID-19 pandemic and may experience delays in their regulatory activities. It is unknown how long these disruptions could continue, were they to
occur. Any elongation or

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de-prioritization of our clinical trials or delay in regulatory review or inspection resulting from such disruptions could materially affect the development and study of our
drug candidates.

• Health regulatory agencies may refuse to accept data from our clinical trials due to mitigation strategies we utilize in response to the COVID-19 pandemic and current
regulatory guidance, which could delay, limit, or prevent marketing approval of our drug or drug candidates. For example, the FDA may find our actions, including the
use of televisits and local laboratories and physicians to conduct clinical trial activities, fail to comply with evolving regulatory guidance and may decide that our data are
insufficient for approval and require additional nonclinical, clinical, or other studies.

•

The trading prices for our common stock and other biopharmaceutical companies have been highly volatile as a result of the COVID-19 pandemic. As a result, we may
face difficulties raising capital through sales of our common stock or such sales may be on unfavorable terms. In addition, a recession, depression, inflation or other
sustained adverse market event resulting from the COVID-19 pandemic could materially and adversely affect our business and the value of our common stock.

While it is not possible at this time to estimate the entirety of the impact that the COVID-19 pandemic will have on our business or operations, the continued spread or future

waves of COVID-19, measures taken by governments, actions taken to protect employees, and the broad impact of the pandemic on all business activities may materially and
adversely affect our preclinical activities, clinical development progress, data and timelines, commercialization efforts including any revenue from sales, supply chain continuity, and
general business operations, and our business, prospects, financial condition, and results of operations could be materially harmed as a result.

Risks Related to Litigation

Product liability lawsuits against us could cause us to incur substantial liabilities and to limit commercialization of our approved drug or any of our drug candidates that we may
develop.

We face an inherent risk of product liability exposure related to the sale and use of our approved drug and the testing of drug candidates in human clinical trials and use of our
drug candidates through compassionate use and expanded access programs, and an even greater risk in connection with our commercialization of our current and future drugs. If we
cannot successfully defend ourselves against any claims that our approved drug or any of our drug candidates caused injuries, we will incur substantial liabilities. Regardless of merit
or eventual outcome, liability claims may result in:

•

•

decreased demand for our approved drug or any of our drug candidates or products that we may develop and commercialize;

injury to our reputation and significant negative media attention;

• withdrawal of clinical trial participants;

•

•

•

•

•

significant costs to defend the related litigation;

substantial monetary awards to trial participants or patients;

loss of revenue or royalties;

reduced resources of our management to pursue our business strategy; and

the inability to commercialize our approved drug or any of our drug candidates that we may develop.

We currently hold $20.0 million in product liability insurance coverage in the aggregate for the U.S. and certain other jurisdictions, with a per incident limit of $20.0 million,
which may not be adequate to cover all liabilities that we may incur or may be responsible for with respect to indemnification obligations. We anticipate that we may need to further
increase our insurance coverage as we expand our clinical trials or if we successfully commercialize additional drugs or drug candidates. Insurance coverage is increasingly
expensive. We may not be able to maintain insurance coverage at a reasonable cost or in an amount adequate to satisfy any liability that may arise.

We could be subject to securities class action litigation.

In the past, securities class action litigation has often been brought against a company following a decline in the market price of its securities. This risk is especially relevant

for us because pharmaceutical companies have experienced significant stock

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price volatility in recent years. If we face such litigation, it could result in substantial costs and a diversion of management's attention and resources, which could harm our business.

Risks Related to Intellectual Property Litigation

We may become involved in lawsuits or administrative disputes to protect or enforce our patents or other intellectual property, which could be expensive, time consuming, and
unsuccessful.

Our commercial success depends on obtaining and maintaining intellectual property rights to our products and product candidates, as well as successfully defending these

rights against third-party challenges. Competitors may infringe our patents, trademarks, copyrights, trade secrets, or other intellectual property. To counter infringement or
unauthorized use, we may be required to file infringement claims, which can be expensive and time consuming and divert the time and attention of our management and scientific
personnel. Any claims we assert against perceived infringers could provoke these parties to assert counterclaims against us alleging that we infringe their patents or their intellectual
property, in addition to counterclaims asserting that our patents are invalid or unenforceable, or both. In any patent infringement proceeding, there is a risk that a court will decide
that a patent of ours is invalid or unenforceable, in whole or in part, and that we do not have the right to stop the other party from using the invention at issue. There is also a risk that,
even if the validity of such patents is upheld, the court will construe the patent's claims narrowly or decide that we do not have the right to stop the other party from using the
invention at issue on the grounds that our patent claims do not cover the invention. An adverse outcome in a litigation or proceeding involving our patents could limit our ability to
assert our patents against those parties or other competitors and may curtail or preclude our ability to exclude third parties from making and selling similar or competitive products.
Any of these occurrences could adversely affect our competitive business position, business prospects, and financial condition. Similarly, if we assert trademark infringement claims,
a court may determine that the marks we have asserted are invalid or unenforceable, or that the party against whom we have asserted trademark infringement has superior rights to
the marks in question. In this case, we could ultimately be forced to cease use of such trademarks.

Even if we establish infringement, the court may decide not to grant an injunction against further infringing activity and instead award only monetary damages, which may or
may not be an adequate remedy. 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 compromised by disclosure during litigation. There could also be public announcements of the results of hearings, motions, or other interim
proceedings or developments. If securities analysts or investors perceive these results to be negative, it could have a material adverse effect on the price of shares of our common
stock. Moreover, there can be no assurance that we will have sufficient financial or other resources to file and pursue such infringement claims, which typically last for years before
they are concluded. Even if we ultimately prevail in such claims, the monetary cost of such litigation and the diversion of the attention of our management and scientific personnel
could outweigh any benefit we receive as a result of the proceedings.

Furthermore, third parties may also raise invalidity or unenforceability claims before administrative bodies in the U.S. or comparable foreign authorities, even outside the
context of litigation. Such mechanisms include re-examination, inter partes review, post-grant review, interference proceedings, derivation proceedings, and equivalent proceedings
in foreign jurisdictions (e.g., opposition proceedings). Such proceedings could result in revocation, cancellation, or amendment to our patents in such a way that they no longer cover
and protect our drug or drug candidates. The outcome following legal assertions of invalidity and unenforceability is unpredictable. With respect to the validity of our patents, for
example, we cannot be certain that there is no invalidating prior art of which we, our licensors, our patent counsel, and the patent examiner were unaware during prosecution. If a
third party were to prevail on a legal assertion of invalidity or unenforceability, we would lose at least part, and perhaps all, of the patent protection on one or more of our drug or
drug candidates. Any such loss of patent protection could have a material adverse impact on our business, financial condition, results of operations, and prospects.

If we are sued for infringing, misappropriating, or otherwise violating intellectual property rights of third parties, such litigation or disputes could be costly and time consuming
and could prevent or delay us from developing or commercializing our drug and drug candidates, and an unfavorable outcome could harm our business.

Our commercial success depends, in part, on our ability to develop, manufacture, market, and sell our drug and drug candidates without infringing, misappropriating, or

otherwise violating the intellectual property and other proprietary rights of third parties. If any third-party patents or patent applications are found to cover our drug or drug
candidates or their methods of use, or manufacturing, we may be required to pay damages, which could be substantial, and we would not be free to manufacture or market our drug
or drug candidates without obtaining a license, which may not be available on commercially reasonable terms, or at all.

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There is a substantial amount of intellectual property litigation in the biotechnology and pharmaceutical industries, and we may become party to, or threatened with, litigation

or other adversarial proceedings regarding intellectual property rights with respect to our drug or drug candidates, including interference proceedings before the U.S. Patent and
Trademark Office (USPTO).

Third parties may assert infringement, misappropriation, or other claims against us based on existing or future intellectual property rights. The outcome of intellectual property
litigation and other disputes is subject to uncertainties that cannot be adequately quantified in advance. The pharmaceutical and biotechnology industries have produced a significant
number of patents, and it may not always be clear to industry participants, including us, which patents cover various types of products or methods of using or manufacturing
products. The coverage of patents is subject to interpretation by the courts, and the interpretation is not always uniform. If we were sued for patent infringement, we would need to
demonstrate that our drug candidates, drug, or methods of use, manufacturing, or other applicable activities either do not infringe the patent claims of the relevant patent or that the
patent claims are invalid or unenforceable, and we may not be successful in doing so. Proving invalidity is difficult. For example, in the U.S., proving invalidity requires a showing
of clear and convincing evidence to overcome the presumption of validity enjoyed by issued patents. Even if we believe third-party intellectual property claims are without merit,
there is no assurance that a court would find in our favor on questions of infringement, validity, or enforceability. Even if we are successful in these proceedings, we may incur
substantial costs and the time and attention of our management and scientific personnel could be diverted in pursuing these proceedings, which could significantly harm our business
and operating results. In addition, we may not have sufficient resources to bring these actions to a successful conclusion.

If we are found to infringe, misappropriate, or otherwise violate 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 forced, including by court order, to cease developing, manufacturing, or commercializing the infringing drug candidate or
drug. Alternatively, we may be required to obtain a license from such third party in order to use the infringing technology and continue developing, manufacturing, or marketing the
infringing drug or drug candidate. However, we may not be able to obtain any required license on commercially reasonable terms, or at all. Even if we were able to obtain a license, it
could be non-exclusive, thereby giving our competitors access to the same technologies licensed to us. In addition, we could be found liable for monetary damages, including treble
damages, and attorneys' fees if we are found to have willfully infringed a patent. We cannot provide any assurances that third-party patents do not exist which might be enforced
against our drug or drug candidates, and a finding of infringement could prevent us from commercializing our drug or drug candidates or force us to cease some of our business
operations, which could materially harm our business. Claims that we have misappropriated the confidential information or trade secrets of third parties could have a similar negative
impact on our business, financial condition, results of operations, and prospects.

We may be subject to claims by third parties asserting that our employees or consultants or we have misappropriated their intellectual property, or claiming ownership of what
we regard as our own intellectual property.

Some of our employees and consultants are currently or have been previously employed at universities or at other biotechnology or pharmaceutical companies, including our

competitors or potential competitors. These employees and consultants may have executed proprietary rights, non-disclosure and non-competition agreements, or similar agreements,
in connection with such other current or previous employment. Although we try to ensure that our employees and consultants 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 individuals have used or disclosed intellectual property, including trade secrets, or other proprietary
information, of third parties. Litigation may be necessary to defend against such claims. If we fail in defending any such claims, in addition to paying monetary damages, we may
lose valuable intellectual property rights or personnel or sustain damages. Such intellectual property rights could be awarded to a third party, and we could be required to obtain a
license from such third party to commercialize our technology or products. Such a license may not be available on commercially reasonable terms, or at all. Even if we are successful
in defending against such claims, litigation could result in substantial costs and be a distraction to our management. Any of the foregoing would have a material adverse effect on our
business, financial condition, results of operations, and prospects.

In addition, while we typically require our employees, consultants, and contractors who may be involved in the development of intellectual property to execute agreements
assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who in fact develops intellectual property that we regard as our
own. In addition, such agreements may not be self-executing such that the intellectual property subject to such agreements may not be assigned to us without additional assignments
being executed, and we may fail to obtain such assignments. In addition, such agreements may be breached. Accordingly, we may be forced to bring claims against third parties, or
defend claims that they may bring against us related to the ownership of such intellectual property. If we fail in prosecuting or defending any such claims, in addition to paying
monetary damages, we may lose valuable intellectual property rights. Even if we are successful in prosecuting or defending against such claims, litigation could result in substantial
costs and be a distraction to our senior management and scientific personnel, which would have a material adverse effect on our business, financial condition, results of operations,
and prospects.

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Risks Related to Our Financial Position, and Capital Needs, and Ownership of Our Common Stock

Risks Related to Our Financial Position

We have incurred significant operating losses since our inception and have not generated sufficient revenue to result in a profit from product sales. We expect to incur continued
losses for the foreseeable future and may never achieve or maintain profitability.

Investment in pharmaceutical product development is a highly speculative undertaking and involves a substantial degree of risk. We were formed and commenced operations
in 2003. Other than QINLOCK, we have no approved products for commercial sale and have not generated sufficient revenue to result in a profit from product sales. We continue to
incur significant research and development and other expenses related to our ongoing operations. As a result, we have never been profitable and have incurred losses in each year
since inception. For the years ended December 31, 2021, 2020, and 2019 we reported net losses of $300.0 million, $266.5 million, and $192.3 million, respectively. As of
December 31, 2021, we had an accumulated deficit of $1.1 billion.

Since our inception, we have focused substantially all of our efforts and financial resources on developing our proprietary compound library, including, without limitation, the

preclinical and clinical development of QINLOCK and our drug candidates and, more recently, establishing a commercial infrastructure. On May 15, 2020, QINLOCK was approved
by the FDA for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib. Except for
QINLOCK, all of our drug candidates, including vimseltinib, and DCC-3116, are still in clinical stages of development. To date, we have not generated sufficient revenue to result in
a profit from the product sales of QINLOCK and have funded our operations primarily with proceeds from the sales of our common stock in public offerings and under the Sales
Agreement, sales of preferred shares, proceeds from the issuance of convertible notes, payments received under a concluded collaboration agreement, upfront and milestone
payments received under our license agreement with Zai, borrowings under a repaid construction loan, and research and development grants from the Kansas Bioscience Authority.
Since our inception, we received an aggregate of $1.3 billion in net proceeds from such transactions. As of December 31, 2021, our cash, cash equivalents, and marketable securities
were $327.6 million.

We expect to incur operating losses for the foreseeable future, particularly as we commercialize QINLOCK and advance development of our drug and drug candidates. Our

prior losses, combined with expected future losses, have had, and will continue to have, an adverse effect on our stockholders' equity and working capital. We expect to incur
significant research and development expenses in connection with our ongoing and future clinical trials for vimseltinib, and DCC-3116, and development of any other future drug
candidates we may choose to pursue. In addition, we will incur significant sales, marketing, and outsourced manufacturing costs and expenses in connection with the
commercialization of QINLOCK and any other approved drugs in the future. We expect to incur costs associated with preparations for commercial activities in Europe in connection
with the marketing approval for QINLOCK in select countries in Europe. We have and will also continue to incur additional costs associated with operating as a public company. As
a result, we expect to continue to incur operating losses for the foreseeable future. Because of the numerous risks and uncertainties associated with developing and commercializing
pharmaceutical products, we are unable to predict the extent of any future losses or when we will become profitable, if at all. Even if we do become profitable, we may not be able to
sustain or increase our profitability on a quarterly or annual basis.

Our ability to become profitable depends upon our ability to generate revenue. To date, we have not generated sufficient revenue to result in a profit from sales of QINLOCK,

and we do not know when, or if, we will generate profits or positive operating cash flows. We also have not obtained marketing approval for QINLOCK outside of the U.S., and
other select jurisdictions, including in key European markets, or for any other indications, and we have not obtained marketing approval for any of our drug candidates. We do not
expect to generate significant revenue from our drug candidates unless and until we obtain marketing approval for, and begin to sell, such drug candidates. Our ability to generate
further revenue from sales of QINLOCK or revenue from sales of our drug candidates depends on a number of factors, including, but not limited to, our ability to:

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successfully complete our Phase 3 MOTION study for vimseltinib in patients with TGCT;

initiate and successfully complete other later-stage clinical trials that meet their clinical endpoints;

initiate and successfully complete all safety studies and related reports required to obtain U.S. and foreign marketing approval for our drug candidates;

continue to maintain and expand commercial manufacturing capabilities or make further arrangements with third-party manufacturers for clinical supply and commercial
manufacturing of QINLOCK and our drug candidates;

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commercialize QINLOCK by deploying a sales force and marketing QINLOCK in the U.S. and key European markets and, either ourselves or through third parties, in
other jurisdictions where we receive approval including Canada and Australia, assisting our licensee, Zai, in its efforts to develop and commercialize QINLOCK in the
PRC, Hong Kong, and Taiwan and, if approved, in Macau, and/or entering into additional license and/or collaboration agreements and/or distribution arrangements with
third parties;

obtain, maintain, protect, and defend our intellectual property portfolio; and

achieve and maintain market acceptance of QINLOCK, or any current or future drug candidate for which we may receive marketing approval, in the medical community
and with third-party payors.

To become and remain profitable, we must succeed in developing, and commercializing, products that generate significant revenue. This will require us to be successful in a

range of challenging activities, including completing preclinical testing and clinical trials for our drug candidates, discovering additional drug candidates, establishing arrangements
with third parties for the manufacture of clinical and commercial supplies of our drug and drug candidates, obtaining marketing approval for our drug candidates, and manufacturing,
marketing, and selling any products for which we obtain marketing approval, including QINLOCK. We are only in early stages of many of these activities. We may never succeed in
these activities and, even if we do, may never generate revenues that are significant enough to achieve profitability.

Because of the numerous risks and uncertainties associated with pharmaceutical product development, we are unable to accurately predict the timing or amount of increased

expenses we will incur or when, or if, we will be able to achieve profitability. If we are required by the FDA, the EMA, or other regulatory authorities to perform studies in addition
to those currently expected, or if there are any delays in establishing appropriate manufacturing arrangements for, or in completing our clinical trials for, the development of any of
our drug candidates, or as a result of impacts from the COVID-19 pandemic, our expenses could increase materially.

Even if we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become and remain profitable would

cause significant harm to our financial position, adversely impact our stock price, and impair our ability to raise capital, expand our business, maintain our research and development
efforts, diversify our product offerings, or even continue our operations. A decline in the value of our company could also cause you to lose all or part of your investment.

We have a limited operating history, have not successfully completed late-stage clinical trials for any drug candidate other than QINLOCK, and have not generated sufficient
revenue to result in a profit from product sales or profits from our operations. We may never achieve or sustain profitability.

We commenced operations in 2003. Our operations to date have been limited to organizing and staffing our company, business planning, raising capital, conducting research
and development, filing patents, identifying potential drug candidates, undertaking preclinical studies, initiating and conducting clinical trials, establishing arrangements with third
parties for the manufacture of our drug and drug candidates, and establishing a commercial infrastructure in the U.S. and key European markets. On May 15, 2020, QINLOCK was
approved by the FDA for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib. Except for
QINLOCK, all of our drug candidates, including vimseltinib and DCC-3116, are still in clinical stages of development.

We have not yet demonstrated our ability to complete Phase 3 clinical trials other than for QINLOCK and we have not generated sufficient revenue to result in a profit from

product sales or profit from our operations. Consequently, we may never achieve or sustain profitability and any predictions you make about our future success or viability may not
be as accurate as they could be if we had an operating history with these activities.

In addition, as a growing business entering into new stages of pharmaceutical development, we may encounter unforeseen expenses, difficulties, complications, delays, and

other known and unknown factors. We are in the early stages of transitioning from a company with a research and development focus to a company supporting commercial activities
and we have limited experience with activities designed to conduct large-scale sales, marketing, and distribution activities necessary for successful product commercialization. While
these efforts are underway, some of the activities are in the early stages and all are subject to numerous risks and uncertainties; accordingly, there can be no assurance that we will be
successful in such a transition.

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We may engage in strategic transactions that could impact our liquidity, increase our expenses, and present significant distractions to our management.

From time to time, we may consider strategic transactions, such as acquisitions of companies, businesses or assets, and out-licensing or in-licensing of products, drug
candidates, or technologies. Additional potential transactions that we may consider include a variety of different business arrangements, including spin-offs, strategic partnerships,
joint ventures, restructurings, divestitures, business combinations, and investments. Any such transaction may require us to incur non-recurring or other charges, may increase our
near term or long-term expenditures, and may pose significant integration challenges or disrupt our management or business, which could adversely affect our operations and
financial results. For example, these transactions may entail numerous operational and financial risks, including:

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exposure to unknown liabilities;

disruption of our business and diversion of our management's time and attention in order to develop acquired products, drug candidates, or technologies;

incurrence of substantial debt or dilutive issuances of equity securities to pay for acquisitions;

higher than expected acquisition and integration costs;

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increased amortization expenses;

difficulty and cost in combining the operations, systems, and personnel of any acquired businesses with our operations, systems, and personnel;

impairment of relationships with key suppliers or customers of any acquired businesses due to changes in management and ownership; and

inability to retain key employees of any acquired businesses.

We have broad discretion in the use of working capital and may not use it effectively.

Our management has broad discretion in the application of working capital, and stockholders do not have the opportunity to assess whether working capital is being used
appropriately. Because of the number and variability of factors that will determine our use of our working capital, its ultimate use may vary substantially from its currently intended
use. Management might not apply working capital in ways that ultimately increase stockholder value. Failure by us to apply working capital effectively could harm our business.
Pending its use, we may invest our working capital in short-term, investment-grade, interest-bearing securities. These investments may not yield a favorable return to our
stockholders. In addition, the fair value of such investments is subject to change as a result of potential market fluctuations, including resulting from the impact of the COVID-19
pandemic. If we do not invest or apply our working capital in ways that enhance stockholder value, we may fail to achieve expected financial results, which could cause our stock
price to decline.

Risks Related to Our Capital Needs

We will require substantial additional funding. If we are unable to raise capital when needed, or on attractive terms, we could be forced to delay, reduce, or eliminate our
research or drug development programs or commercialization efforts.

We expect to incur significant expenses in connection with our ongoing activities, particularly as we commercialize QINLOCK, and advance our drug candidates, vimseltinib,

and DCC-3116, and seek to identify lead drug candidates in our research programs. We expect increased expenses as we continue our research and development and initiate
additional clinical trials and establish arrangements with third parties for the manufacture of clinical supplies of and seek marketing approval for our drug candidates. In addition, we
expect to incur significant commercialization costs and expenses related to product manufacturing, marketing, sales, and distribution of QINLOCK, including related to the initiation
of our commercial launch in key European markets and any current or future drug candidate for which we may receive marketing approval. Furthermore, we expect to continue to
incur costs associated with operating as a public company.

Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise capital when needed, or on attractive

terms, we could be forced to delay, reduce, or eliminate our research or drug development programs or our commercialization efforts.

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We believe that our cash, cash equivalents, and marketable securities as of December 31, 2021, together with anticipated product, royalty, and supply revenues, but excluding
any potential future milestone payments under our collaboration or license agreements will enable us to fund our operating expenses and capital expenditure requirements into 2024.
We have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect.

Our future capital requirements will depend on many factors, including:

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the scope, progress, costs, and results of drug discovery, preclinical development, and clinical trials for our drug candidates;

the anticipated cost savings of our corporate restructuring;

the cost of maintaining, expanding, or contracting for sales, marketing, and distribution capabilities in connection with commercialization of QINLOCK or any future
drugs for which we may receive marketing approval;

the success of our commercialization efforts and market acceptance for QINLOCK or any of our future approved drugs;

the number and development requirements of drug candidates that we pursue, including ones we may acquire from third parties;

the costs and timing of arrangements with third parties for the manufacture of clinical and commercial supplies of QINLOCK and our drug candidates;

the costs, timing, and outcome of regulatory review of our drug candidates and for QINLOCK in additional geographies, including in key European markets;

the costs and timing of commercialization activities, including product manufacturing, marketing, sales, and distribution, for QINLOCK and any of our drug candidates
for which we obtain marketing approval, as well as infrastructure costs in the U.S. and key European markets, and in other jurisdictions where we may seek marketing
approval and choose to sell or enter into distribution arrangements;

the revenue received from commercial sales of QINLOCK and our drug candidates for which we obtain marketing approval, if any;

the achievement of milestones or occurrence of other developments that trigger payments, including, without limitation, milestone or royalty payments, to us under our
license agreement with Zai or any collaboration, distribution, or other license agreements that we have entered into or may enter into in the future, if any;

the costs and timing of preparing, filing, and prosecuting any patent applications, maintaining and enforcing our intellectual property rights, and defending any intellectual
property-related claims;

our ability to establish additional license, distributor, and/or collaboration arrangements with other biotechnology or pharmaceutical companies on favorable terms, if at
all, for the development or commercialization of our drug candidates; and

the extent to which we acquire or in-license drug candidates, technologies, and associated intellectual property rights, which may require up-front, milestone and/or
royalty payments to the seller or licensor.

Identifying potential drug candidates and conducting preclinical testing and clinical trials and, for any drug candidates that receive marketing approval, establishing and
maintaining a commercial infrastructure, is a time-consuming, expensive, and uncertain process that takes years to complete, and we may never generate the necessary data or results
required to obtain additional marketing approvals, including for QINLOCK in additional geographies, and achieve sufficient revenues to result in a profit for any of our drug
candidates that receive marketing approval, including for QINLOCK. In addition, QINLOCK and any of our drug candidates that receive marketing approval may not achieve
commercial success. Accordingly, we will need to obtain substantial additional funds to achieve our business objectives. Adequate additional funds may not be available to us on
acceptable terms, or at all.

Risks Related to Ownership of Our Common Stock

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

Until at least such time, if ever, as we can generate sufficient product revenues to result in a profit, we expect to finance our cash needs primarily through a combination of

equity, debt, or other financings, collaborations, strategic alliances, and marketing,

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distribution, or licensing arrangements. We do not currently have any committed external source of funds. In addition, we may seek additional capital due to favorable market
conditions or strategic considerations, even if we believe we have sufficient funds for our current or future operating plans. To the extent that we raise additional capital through the
sale of equity or convertible debt securities, your ownership interest will be diluted, and the terms of our securities may include liquidation or other preferences that adversely affect
your rights as a common stockholder. Debt financing and preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to
take specific actions, such as incurring additional debt, making acquisitions or capital expenditures, or declaring dividends.

If we raise additional funds through collaborations, strategic alliances or marketing, distribution, or licensing arrangements with third parties, we may have to relinquish
valuable rights to our technologies, future revenue streams, research programs, drug or drug 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 or other arrangements when needed, we may be required to delay, limit, reduce, or terminate our research, product
development, or commercialization efforts, or grant rights to develop and market drugs and drug candidates that we would otherwise prefer to develop and market ourselves.

We expect our operating results to fluctuate in future periods, which may adversely affect our stock price.

Our quarterly operating results have fluctuated in the past, and we believe they will continue to do so in the future. Our operating results may fluctuate due to the level of
success of our commercial efforts, as well as the variable nature of our operating expenses as a result of the timing and magnitude of expenditures. In one or more future periods, our
results of operations may fall below the expectations of securities analysts and investors. In that event, the market price of our common stock could decline.

Our executive officers, directors, and principal stockholders, if they choose to act together, will continue to have the ability to significantly influence all matters submitted to
stockholders for approval.

As of January 31, 2022, our executive officers and directors, and, based on filings required by Section 13 of the Exchange Act through February 1, 2022, combined with our

stockholders who own more than 10% of our outstanding capital stock, beneficially own shares, in the aggregate, representing approximately 31% of our capital stock. As a result, if
these stockholders were to choose to act together, they would be able to exert significant influence over all matters submitted to our stockholders for approval, as well as our
management and affairs. For example, these persons, if they choose to act together, would have significant influence over the election of directors and approval of any merger,
consolidation, or sale of all or substantially all of our assets. This concentration of ownership control may:

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delay, defer, or prevent a change in control;

entrench our management and the board of directors; or

impede a merger, consolidation, takeover, or other business combination involving us that other stockholders may desire.

Provisions in our corporate charter documents, under Delaware law and in certain of our contractual agreements could make an acquisition of our company, 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 our amended and restated by-laws may discourage, delay, or prevent a merger, acquisition, or other

change in control of our company that stockholders may consider favorable, including transactions in which you might otherwise receive a premium for your shares. These
provisions could also limit the price that investors might be willing to pay in the future for shares of our common stock, thereby depressing the market price of our common stock. In
addition, because our board of directors is responsible for appointing the members of our management team, 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. Among other things, these
provisions:

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establish a classified board of directors such that only one of three classes of directors is elected each year;

allow the authorized number of our directors to be changed only by resolution of our board of directors;

limit the manner in which stockholders can remove directors from our board of directors;

establish advance notice requirements for stockholder proposals that can be acted on at stockholder meetings and nominations to our board of directors;

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require that stockholder actions must be effected at a duly called stockholder meeting and prohibit actions by our stockholders by written consent;

limit who may call stockholder meetings;

authorize our board of directors to issue preferred stock without stockholder approval, which could be used to institute a “poison pill” that would work to dilute the stock
ownership of a potential hostile acquirer, effectively preventing acquisitions that have not been approved by our board of directors; and

require the approval of the holders of at least 75% of the votes that all our stockholders would be entitled to cast to amend or repeal specified provisions of our charter or
by-laws.

Moreover, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which prohibits a person

who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of three years after the date of the transaction in which the person
acquired in excess of 15% of our outstanding voting stock, unless the merger or combination is approved in a prescribed manner.

Our amended and restated by-laws designate specific courts as the 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 amended and restated by-laws 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 any state law claims for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim of breach of or based on a breach of a
fiduciary duty owed by any of our current or former directors, officers, and employees to us or our stockholders, (iii) any action asserting a claim against us or any of our current or
former directors, officers, employees, or stockholders arising pursuant to any provision of the Delaware General Corporation Law, our amended and restated certificate of
incorporation or our amended and restated by-laws, or (iv) any action asserting a claim governed by the internal affairs doctrine (collectively, the Delaware Forum Provision). The
Delaware Forum Provision will not apply to any causes of action arising under the Securities Act or the Exchange Act. Our amended and restated by-laws further provide that unless
we consent in writing to the selection of an alternative forum, the United States District Court for the District of Massachusetts shall be the exclusive forum for resolving any
complaint asserting a cause of action arising under the Securities Act, or the Federal Forum Provision, as our principal executive offices are located in Waltham, Massachusetts. In
addition, 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 the Delaware Forum
Provision and the Federal Forum Provision; provided, however, that stockholders cannot and will not be deemed to have waived our compliance with the U.S. federal securities laws
and the rules and regulations thereunder.

We recognize that the Delaware Forum Provision and the Federal Forum Provision may impose additional litigation costs on stockholders who assert the provision is not

enforceable and may impose more general litigation costs in pursuing any such claims, particularly if the stockholders do not reside in or near the State of Delaware or the
Commonwealth of Massachusetts. Additionally, these forum selection clauses in our amended and restated by-laws 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 the filing of such lawsuits against us and our directors, officers, and
employees even though an action, if successful, might benefit our stockholders. While the Delaware Supreme Court ruled in March 2020 that federal forum selection provisions
purporting to require claims under the Securities Act be brought in federal court are “facially valid” under Delaware law, there is uncertainty as to whether other courts will enforce
our Federal Forum Provision. The Federal Forum Provision may also impose additional litigation costs on stockholders who assert that the provision is unenforceable, and if the
Federal Forum Provision is found to be unenforceable, we may incur additional costs with resolving such matters. The Court of Chancery of the State of Delaware and the United
States District Court for the District of Massachusetts 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.

The market price of our common stock may be volatile and fluctuate substantially upon the occurrence of future events, 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 smaller biopharmaceutical companies in particular have experienced extreme volatility

that has often been unrelated to the operating performance of particular companies. Our common stock is currently quoted on the Nasdaq Global Select Market under the symbol
“DCPH.” Since our common stock began trading on the Nasdaq Global Select Market on September 28, 2017, our stock has traded at prices as low as

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$7.36 per share and as high as $71.11 per share through January 31, 2022. Market prices for our common stock will be influenced by a number of factors, including:

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the issuance of new equity securities pursuant to a future offering, including issuances of preferred stock;

changes in interest rates;

significant dilution caused by the anti-dilutive clauses in our financial agreements;

the success of commercialization of our drug and drug candidates, if approved;

competitive developments, including announcements by competitors of new products or services or significant contracts, acquisitions, strategic partnerships, joint
ventures, or capital commitments;

variations in quarterly operating results or those of companies that are perceived to be similar to us;

the depth and liquidity of the market for our common stock;

investor perceptions of our company and the pharmaceutical and biotech industries generally;

the degree of success of competitive products or technologies;

results of clinical trials and preclinical studies, of our drug or drug candidates or those of our competitors;

regulatory or legal developments in the U.S. and other countries;

receipt of, or failure to obtain, regulatory approvals;

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 drug or any of our drug candidates or clinical development programs;

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

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

rumors or announcements regarding transactions involving our company or our drug or drug candidates;

changes in the structure of healthcare payment systems;

• market conditions in the pharmaceutical and biotechnology sectors;

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general economic, industry, and market conditions and other national conditions; and

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

If we fail to maintain proper and effective internal control over financial reporting, our ability to produce accurate and timely financial statements could be impaired, which
could harm our operating results, investors’ views of us and, as a result, the value of our common stock.

Pursuant to Section 404 of the Sarbanes-Oxley Act (Section 404), our independent registered public accounting firm is required to attest to the effectiveness of our internal

control over financial reporting. Preparing such attestation report and the cost of compliance with reporting requirements that we had not previously implemented has and will
continue to increase our expenses and require significant management time. Investors may find our common stock less attractive because of the additional compliance costs. 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 stock price may be more volatile.

The rules governing the standards that must be met for management and our independent registered public accounting firm to assess our internal control over financial

reporting are complex and require significant documentation, testing, and possible remediation. In connection with our and our independent registered public accounting firm's
evaluations of our internal control over financial reporting, we may need to upgrade systems, including information technology, implement additional financial and management
controls, reporting systems, and procedures, and hire additional accounting and finance staff.

Any failure to implement required new or improved controls, or difficulties encountered in their implementation, could cause us to fail to meet our reporting obligations. In

addition, any testing by us or our independent registered public accounting firm conducted in connection with Section 404 may reveal deficiencies in our internal control over
financial reporting that are deemed to be material weaknesses or that may require prospective or retroactive changes to our financial statements or identify

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other areas for further attention or improvement. Inferior internal controls could also cause investors to lose confidence in our reported financial information, which could have a
negative effect on the trading price of our common stock. Internal control deficiencies could also result in a restatement of our financial results in the future. We could become
subject to stockholder or other third-party litigation, as well as investigations by the SEC, the Nasdaq Global Select Market, or other regulatory authorities, which could require
additional financial and management resources and could result in fines, trading suspensions, payment of damages or other remedies. Further, any delay in compliance with the
auditor attestation provisions of Section 404 could subject us to a variety of administrative sanctions, including ineligibility for short-form resale registration, action by the SEC and
the suspension or delisting of our common stock, which could reduce the trading price of our common stock and could harm our business.

Because we do not anticipate paying any cash dividends on our capital stock in the foreseeable future, capital appreciation, if any, will be your sole source of gain.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all of our future earnings, if any, to finance the growth and development of

our business. In addition, the terms of any future debt agreements we may enter into may preclude us from paying dividends. As a result, capital appreciation, if any, of our common
stock will be your sole source of gain for the foreseeable future.

Risks Related to Our Dependence on Third Parties

We rely, and expect to continue to rely, on third parties to conduct our clinical trials and preclinical studies, and those third parties may not perform satisfactorily, or may
experience delays in performing these services, including failing to meet deadlines for the completion of such trials or studies, which may harm our ability to obtain regulatory
approval for or commercialize our approved drug and drug candidates and our business could be substantially harmed.

We currently rely on various third-party CROs to conduct our ongoing clinical trials for QINLOCK, vimseltinib, and DCC-3116, and do not plan to independently conduct any

clinical trials for our future drug candidates. We expect to continue to rely on third parties, such as CROs, clinical data management organizations, medical institutions, and clinical
investigators, to conduct our clinical trials. We also rely on CROs, including third-party laboratories, to conduct some of our preclinical studies. Agreements with these third parties
might terminate or be amended for a variety of reasons, including a failure to perform by the third parties. If we need to enter into alternative arrangements, that would delay our
product development and commercialization activities.

Our reliance on these third parties for research and development activities will reduce our control over these activities but will not relieve us of our responsibilities. For
example, we will remain responsible for ensuring that each of our clinical trials is conducted in accordance with the general investigational plan and protocols for the trial. Moreover,
the FDA requires us to comply with requirements, commonly referred to as good clinical practices, for conducting, recording, and reporting the results of clinical trials to assure that
data and reported results are credible and accurate and that the rights, integrity, and confidentiality of trial participants are protected.

Furthermore, these third parties may have relationships with other entities, some of which may be our competitors, and have substantial other contractual obligations with their

other clients. In addition, these third parties could experience business interruptions, for example in connection with COVID-19, that could hinder their ability to meet their
contractual obligations to us or may delay their performance of the services they conduct for us. If these third parties do not successfully carry out their contractual duties, meet
expected deadlines or conduct our clinical trials in accordance with regulatory requirements, applicable laws, rules and regulations, and our stated protocols, we will not be able to
obtain, or may be delayed in obtaining, marketing approvals for our drug candidates and will not be able to, or may be delayed in our efforts to, successfully commercialize our drug
candidates, if approved.

Manufacturing pharmaceutical products is complex and subject to product loss for a variety of reasons. We contract with third parties for the manufacture of our drug
candidates for preclinical testing, clinical trials, and for the manufacture of QINLOCK. This reliance on third parties increases the risk that we will not have sufficient
quantities of our drug or drug candidates or such quantities at an acceptable cost or quality, which could delay, prevent, or impair our development or commercialization efforts.

We do not own any manufacturing facilities. We produce in our research laboratories very small quantities of drug substance for evaluation in our research programs. We rely,

and expect to continue to rely, on third parties for the manufacture of our drug candidates for preclinical and clinical testing, and for the commercial manufacture of any of our
current and future drugs.

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As a general matter, our manufacturers represent our sole source of supply. This reliance on third parties increases the risk that we will not have sufficient quantities of our drug or
drug candidates or such quantities at an acceptable cost or quality or in a timely manner, which could delay, prevent, or impair our development or commercialization efforts, or those
of our partners. Although we actively manage these third-party relationships to ensure continuity, quality, and compliance with regulations, some events beyond our control,
including global instability due to political unrest or from an outbreak of pandemic or contagious disease, such as COVID-19, could result in supply chain disruptions or the complete
or partial failure of these manufacturing services. Any such failure or disruptions could materially adversely affect our business, financial condition, cash flows, and results of
operations.

We may be unable to establish any agreements with third-party manufacturers or to do so on acceptable terms. Even if we are able to establish agreements with third-party

manufacturers, reliance on third-party manufacturers entails additional risks, including:

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reliance on the third party for regulatory, compliance, and quality assurance;

the possible breach of the manufacturing agreement by the third party;

if the third party ceases its operations for any reason;

our relative importance as a customer to the third party and whether the third party subordinates our needs to its other customers;

the possible misappropriation of our proprietary information, including our trade secrets and know how; and

the possible termination or nonrenewal of the agreement by the third party, including sole source suppliers, at a time that is costly or inconvenient for us.

We have only limited supply arrangements in place with respect to our drug candidates and sole source supplier arrangements for our commercial supply of drug substance,

and finished drug product for QINLOCK. We acquire many key materials on a purchase order basis. As a result, while we have commercial supply arrangements for our drug
substance and finished drug product for QINLOCK, we do not have long term supply arrangements with respect to our drug candidates and other materials. We do not currently have
arrangements in place for redundant supply or a second source for drug substance or drug product. We rely on our sole source suppliers to manufacture all of our drug substance and
finished drug product for commercialization of QINLOCK unless and until we add additional sources. If we obtain marketing approval for any of our drug candidates, we will need
to establish an agreement for commercial manufacture with a third party. Any performance failure on the part of our existing or future manufacturers could delay clinical
development, marketing approval, or commercial supply, including with respect to QINLOCK. If our current sole source suppliers, or future third-party manufacturers, cannot
perform as agreed, or if such contract manufacturers choose to terminate their agreements with us, we would be required to replace such manufacturers. We may incur added costs,
delays, and difficulties in identifying and qualifying any such replacement manufacturer or in reaching an agreement with any such alternative manufacturers. In addition, we depend
on the proprietary technology of our third-party manufacturers for QINLOCK and certain of our drug candidates and we may have difficulty, or there may be contractual restrictions
prohibiting us from, transferring such skills to a back-up or alternate supplier, or we may be unable to transfer such skills at all. We will also need to verify, such as through a
manufacturing comparability study, that any new supplier will produce our product candidate or product according to the specifications previously submitted to the FDA or another
regulatory authority. In addition, changes in suppliers often involve changes in manufacturing procedures and processes, which could require that we conduct bridging studies
between our prior clinical supply used in our clinical trials and that of any new supplier. The delays associated with the verification of a new supplier or comparability of new
manufacturing processes could negatively affect our ability to develop product candidates or commercialize our product in a timely manner or within budget.

If any supplier facility does not pass a pre-approval inspection by the FDA or if the FDA finds significant deficiencies at any such facility as part of any NDA approval process

for any drug candidate, we will not be able to commercialize this drug candidate until the third-party manufacturer comes into compliance or we secure an agreement for another
facility, which is determined to be adequate by the FDA. If the FDA requires changes to our manufacturing process or the conditions, processes, or other matters at any supplier
facility as part of its response to any NDA we may submit for a drug candidate, it will delay our approval. We have limited control over our third-party manufacturer's ability to make
changes or respond to address any FDA concerns. The facility that our supplier of QINLOCK will initially use to manufacture commercial supply has limited experience
manufacturing commercial finished drug product.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the CARES Act), drafted in response to the U.S. COVID-19 pandemic, became law. Throughout

the COVID-19 pandemic, there has been public concern over the availability and accessibility of critical medical products, and the CARES Act enhanced FDA's existing authority
with respect to drug

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shortage measures. Under the CARES Act, we must have in place a risk management plan that identifies and evaluates the risks to the supply of approved drugs for certain serious
diseases or conditions for each establishment where the drug or active pharmaceutical ingredient is manufactured. The risk management plan will be subject to FDA review during an
inspection. If we experience shortages in the supply of our marketed product, our results could be materially impacted.

For our other potential products, if we are not able to negotiate commercial supply terms with any third-party manufacturers, we may be unable to commercialize our drug

candidates if they were to be approved, and our business and financial condition would be materially harmed. If we are forced to accept unfavorable terms for our relationships with
any such third-party manufacturer, our business and financial condition would be materially harmed.

Third-party manufacturers may not be able to comply with the FDA’s cGMP regulations or similar regulatory requirements outside of the U.S., including in Europe. Our

failure, or the failure of our third-party manufacturers, to comply with applicable regulations could result in sanctions being imposed on us, including clinical holds, fines,
injunctions, civil penalties, delays, suspension or withdrawal of approvals, seizures or voluntary recalls of drug candidates or products, operating restrictions, and criminal
prosecutions, any of which could significantly and adversely affect supplies of our drug or drug candidates. Third-party manufacturers' failure to achieve and maintain high
manufacturing standards, in accordance with applicable regulatory requirements, or the incidence of manufacturing errors, also could result in patient injury or death, product
shortages, delays or failures in product testing or delivery, cost overruns, or other problems that could seriously harm our business. Third-party manufacturers often encounter
difficulties involving production yields, quality control, and quality assurance, as well as shortages of qualified personnel.

Our drug and drug candidates may compete with other drugs and drug candidates for access to manufacturing facilities. As a result, we may not obtain access to these facilities

on a priority basis or at all. There are a limited number of manufacturers that operate under cGMP regulations and that might be capable of manufacturing for us.

We have not yet scaled up the commercial manufacturing process for any of our drug candidates, other than our approved drug, QINLOCK. Even minor deviations from
normal manufacturing processes could result in reduced production yields, product defects, and other supply disruptions. If microbial, viral, or other contaminations are discovered in
our drug or drug candidates or in the manufacturing facilities in which our drug or drug candidates are made, such manufacturing facilities may need to be closed for an extended
period of time to investigate and remedy the contamination.

Our current and anticipated future dependence upon others for the manufacture of our drug or drug candidates may adversely affect our future profit margins and our ability to

commercialize our approved products on a timely and competitive basis.

We may enter into license and/or collaborations with third parties for the development and commercialization of our approved drug or drug candidates. If those license and/or
collaborations, including, without limitation, our license arrangement with Zai for the development and commercialization of QINLOCK in Greater China, are not successful,
we may not be able to capitalize on the market potential of our approved drug or drug candidates.

We have in the past, currently have, and may in the future, seek third-party licensees and/or collaborators for the development and commercialization of certain approved drugs

or drug candidates on a selective basis. Our likely licensees and/or collaborators for any arrangements include large and mid-size pharmaceutical companies, regional and national
pharmaceutical companies, and biotechnology companies. For example, in 2019, we licensed QINLOCK for development and commercialization in Greater China to Zai, a China
and U.S.-based commercial stage biopharmaceutical company. Zai received regulatory approval to market QINLOCK in the PRC and Hong Kong in March 2021 and Taiwan in
September 2021. We will not derive product revenue from Zai's sales of QINLOCK in Greater China and will in return for the license rights granted receive specified payments in the
form of an upfront payment, certain milestone payments, if achieved, and royalties on the licensee's sales of QINLOCK in Greater China during a specified period.

To the extent we have, and if we do enter into any further such arrangements with any third parties, we will likely have, limited control over the amount and timing of

resources that our licensees and/or collaborators dedicate to the development or commercialization of our drug or drug candidates. Our ability to generate revenues from these
arrangements will depend on our licensees' and/or collaborators' abilities and efforts to successfully perform the functions assigned to them in these arrangements. License and
collaborations involving our drug or drug candidates would pose numerous risks to us, including the following:

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licensees and/or collaborators have significant discretion in determining the efforts and resources that they will apply to these arrangements and may not perform their
obligations as expected;

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licensees and/or collaborators may deemphasize or not pursue development and commercialization of our approved drug or drug candidates or may elect not to continue
or renew development or commercialization programs based on clinical trial results, changes in their strategic focus, including as a result of a sale or disposition of a
business unit or development function, or available funding or external factors such as an acquisition that diverts resources or creates competing priorities;

licensees and/or collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial, or abandon an approved drug or drug
candidate, repeat, or conduct new clinical trials, or require a new formulation of a drug candidate for clinical testing;

licensees and/or collaborators could independently develop, or develop with third parties, products that compete directly or indirectly with our approved drug or drug
candidates if they believe that competitive products are more likely to be successfully developed or can be commercialized under terms that are more economically
attractive than ours;

license or collaboration arrangements may subject us to exclusivity provisions which could restrict our ability to compete in certain territories, including those licensed to
the licensee and/or collaborator;

a licensee and/or collaborator with marketing and distribution rights to multiple products may not commit sufficient resources to the marketing and distribution of our
product relative to other products;

licensees and/or collaborators may not properly obtain, maintain, defend, or enforce our intellectual property rights or may use our proprietary information and intellectual
property in such a way as to invite litigation or other intellectual property related proceedings that could jeopardize or invalidate our proprietary information and
intellectual property or expose us to potential litigation or other intellectual property related proceedings;

disputes may arise between the licensees and/or collaborators and us that result in the delay or termination of the research, development, or commercialization of our
approved drug or drug candidates or that result in costly litigation or arbitration that diverts management attention and resources;

licenses and/or collaborations may be terminated and, if terminated, may result in a need for additional capital to pursue further development or commercialization of our
approved drug or drug candidates;

license or collaboration agreements may not lead to development or commercialization of our approved drug or drug candidates in the most efficient manner, or at all; and

if a licensee and/or collaborator of ours were to be involved in a business combination, the continued pursuit and emphasis on our product development or
commercialization program could be delayed, diminished, or terminated.

If our license arrangement with Zai, or any future license or collaboration we may enter into, if any, is not successful, our business, financial condition, results of operations,

prospects, and development and commercialization efforts may be adversely affected. Any termination or expiration of our license agreement with Zai, or any future license or
collaboration we may enter into, if any, could adversely affect us financially or harm our business reputation, development, and commercialization efforts.

If we are not able to establish licenses and/or collaborations, or distribution arrangements with distributors, we may have to alter our development and commercialization plans.

Our drug development programs and the commercialization of QINLOCK and any drug candidates for which we obtain marketing approval will require substantial additional
cash to fund expenses. In the past, we have been party to a collaboration agreement, which was concluded before completion because our collaboration partner elected not to pursue
the development of the drug candidate beyond Phase 1 clinical trials. We have entered into a license transaction for development and commercialization of QINLOCK in Greater
China. We may in the future decide to enter into additional licenses for QINLOCK or license to or collaborate with pharmaceutical and biotechnology companies for the
development and potential commercialization of our drug candidates. We currently have, and may in the future choose to enter into distribution arrangements with local distributors
in jurisdictions where we gain marketing authorization but do not wish to invest in our own local sales and commercial support infrastructure.

We face significant competition in seeking appropriate licensees and/or collaborators or distributors. Our ability to reach a definitive agreement for a license and/or
collaboration or distribution arrangement will depend, among other things, upon our assessment of the licensee/collaborator/distributor's resources and expertise, the terms and
conditions of the proposed transaction, and the proposed licensee/collaborator/distributor's evaluation of a number of factors. Those factors may include the following:

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the design or results of clinical trials;

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the likelihood of approval by the FDA or similar regulatory authorities outside of the U.S.;

the potential market for the subject drug or drug candidate;

the costs and complexities of manufacturing and delivering such drug or drug candidate to patients;

the potential of competing products;

the ability of our intellectual property portfolio to exclude others from marketing competing products that could read on our rights, including, without limitation, generic
products;

the existence of uncertainty with respect to our ownership of technology or other rights, which can exist if there is a challenge to such ownership without regard to the
merits of the challenge; and

industry and market conditions generally, including due to the impact of COVID-19.

The licensee/collaborator/distributor may also consider alternative drug candidates or technologies for similar indications that may be available to collaborate on and whether

such a collaboration could be more attractive than the one with us for our drug or drug candidate. We may also be restricted under any license agreements, including, without
limitation, our license agreement with Zai, from entering into agreements on certain terms or at all with potential licensees, collaborators, or distributors. Licenses or collaborations
are complex and time-consuming to negotiate and document. 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 licensees/collaborators and changes to the strategies of the combined company.

We may not be able to negotiate licenses, collaborations, or distribution arrangements 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 such drug candidate, reduce, or delay one or more of our other development programs, delay the commercialization of such drug or drug candidate, if
approved, or reduce the scope of any sales or marketing activities for such drug or drug candidate, or increase our expenditures and undertake development, manufacturing, or
commercialization activities at our own expense. If we elect to increase our expenditures to fund development, manufacturing, 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. If we do not have sufficient funds, we may not be able to further develop our drug
candidates or bring them to market and generate product revenue.

Risks Related to Our Intellectual Property

We may not be able to enforce our intellectual property rights throughout the world.

Filing, prosecuting, and defending patents with respect to our drug and drug candidates in all countries throughout the world would be prohibitively expensive, and the laws of

foreign countries may not protect our rights to the same extent as the laws of the U.S. The requirements for patentability may differ in certain countries, particularly in developing
countries. In addition, our intellectual property license agreements may not always include worldwide rights. Consequently, competitors and other third parties may use our
technologies in jurisdictions where we have not obtained patent protection to develop their own products and, further, may export otherwise infringing products to territories where
we may obtain patent protection, but where patent enforcement is not as strong as that in the U.S. These products may compete with our products in jurisdictions where we do not
have any issued or licensed patents or where any future patent claims or other intellectual property rights may not be effective or sufficient to prevent them from competing with us,
which could have a material adverse effect on our business, financial condition, results of operations, and prospects.

Moreover, our ability to protect and enforce our intellectual property rights may be adversely affected by unforeseen changes in foreign intellectual property laws. Additionally,

laws of some countries outside of the U.S. and Europe do not afford intellectual property protection to the same extent as the laws of the U.S. and Europe. Many companies have
encountered significant problems in protecting and defending intellectual property rights in certain foreign jurisdictions. The legal systems of some countries, including India, China,
and other developing countries, do not favor the enforcement of patents and other intellectual property rights, particularly those relating to biotechnology products, which could make
it difficult for us to stop the infringement, misappropriation, or other violation of our patents or other intellectual property rights. For example, many foreign countries have
compulsory licensing laws under which a patent owner must grant licenses to third parties. Consequently, we may not be able to prevent third parties from practicing our inventions
in certain countries outside the U.S. and Europe. In addition, many countries limit the enforceability of patents against government agencies or government contractors. In these
countries, the patent owner may have limited remedies, which could materially diminish the value of such patent. If we are forced to grant a license to third parties with respect to
any patents relevant to our business, our competitive position may be impaired, and our business, financial condition, results of operations, and prospects may be adversely affected.

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Proceedings to enforce our patent rights in foreign jurisdictions, whether or not successful, could result in substantial costs and divert our efforts and resources from other
aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly, could put our patent applications at risk of not issuing, and could provoke third
parties to assert claims against us. We may not prevail in any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful.
Furthermore, while we intend to protect our intellectual property rights in major markets for our products, we cannot ensure that we will be able to initiate or maintain similar efforts
in all jurisdictions in which we may wish to market our products. Accordingly, our efforts to protect our intellectual property rights in such countries may be inadequate.

If we are unable to protect the confidentiality of our trade secrets, the value of our technology could be materially adversely affected and our business would be harmed.

While we have obtained composition of matter patents with respect to our drug and certain of our drug candidates, we also rely on proprietary know-how and trade secret
protection and confidentiality agreements to protect proprietary know-how or trade secrets that are not patentable or that we elect not to patent. For example, we have elected to not
patent our proprietary switch-control kinase inhibitor platform and therefore rely on protecting the proprietary aspects of our platform as a trade secret. We seek to protect our trade
secrets and proprietary know-how in part, by entering into non-disclosure and confidentiality agreements with parties who have access to them, such as our employees, consultants,
independent contractors, advisors, contract manufacturers, suppliers, collaborators, and other third parties. We also enter into confidentiality and invention or patent assignment
agreements with employees and certain consultants. However, we cannot guarantee that we have entered into such agreements with each party that may have or have had access to
our trade secrets or proprietary know-how. Additionally, our confidentiality agreements and other contractual protections may not be adequate to protect our intellectual property
from unauthorized disclosure, third-party infringement, or misappropriation. Any party with whom we have executed such an agreement may breach that agreement and disclose our
proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. 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, if any of our trade secrets were to be lawfully obtained or
independently developed by a competitor, we would have no right to prevent such third party, or those to whom they communicate such technology or information, from using that
technology or information to compete with us. If any of our trade secrets, including with respect to our proprietary switch-control kinase inhibitor platform, were to be disclosed to or
independently developed by a competitor or other third party, our business, financial condition, results of operations, and our business prospects and competitive position could be
materially harmed.

If we fail to comply with our obligations under any license, collaboration, or other agreement, we may be required to pay damages and could lose intellectual property rights that
are necessary for developing and protecting our drug or drug candidates.

We rely, in part, on license, collaboration, and other agreements. We may need to obtain additional licenses from others to advance our research or allow commercialization of
our drug and drug candidates and it is possible that we may be unable to obtain additional licenses at a reasonable cost or on reasonable terms, if at all. 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. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to use. We also may be unable to license or
acquire third party intellectual property rights on terms that would allow us to make an appropriate return on our investment.

In addition, our present and future licenses, collaborations, and other intellectual property related agreements, are likely to impose various development, commercialization,

funding, milestone, royalty, diligence, sublicensing, insurance, patent prosecution and enforcement, or other obligations on us. If we breach any of these obligations, or use the
intellectual property licensed to us in an unauthorized manner, we may be required to pay damages and our licensors may have the right to terminate the license. If our license or
other intellectual property related agreements are terminated, we may be required to cease developing and commercializing drugs or drug candidates that are covered by the licensed
intellectual property. Disputes may arise regarding intellectual property subject to a licensing, collaboration, or other agreement, including:

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the scope of rights granted under the agreement and other interpretation related issues;

the extent to which our technology and processes infringe on intellectual property of the licensor that is not subject to the agreement;

the sublicensing of patent and other rights under our collaborative development relationships;

our diligence obligations under the agreement and what activities satisfy those diligence obligations;

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the inventorship and ownership of inventions and know-how resulting from the joint creation or use of intellectual property by our licensors and us and our collaborators;
and

the priority of invention of patented technology.

In addition, the agreements under which we license intellectual property or technology to or from third parties are complex, and certain provisions in such agreements may be

susceptible to multiple interpretations. 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. Moreover, 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 drug or drug
candidates.

In some circumstances, we may not have the right to control the preparation, filing, and prosecution of patent applications, or to maintain the patents, covering the technology

that we license from third parties. Therefore, we cannot be certain that these patents and applications will be prosecuted, maintained, and enforced in a manner consistent with the
best interests of our business. If our licensors fail to obtain or maintain such intellectual property, or lose rights to such intellectual property, the rights we have licensed and our
exclusivity may be reduced or eliminated and our right to develop and commercialize any of our products that are subject to such licensed rights could be adversely affected.

Moreover, our rights to our in-licensed patents and patent applications may depend, in part, on inter-institutional or other operating agreements between the joint owners of

such in-licensed patents and patent applications. If one or more of such joint owners breaches such inter-institutional or operating agreements, our rights to such in-licensed patents
and patent applications may be adversely affected. In addition, while we cannot currently determine the amount of the royalty obligations we would be required to pay on sales of
future products, if any, the amounts may be significant. The amount of our future royalty obligations will depend on the technology and intellectual property we use in products that
we successfully develop and commercialize, if any. Therefore, even if we successfully develop and commercialize products, we may be unable to achieve or maintain profitability.
Any of the foregoing could have a material adverse effect on our competitive position, business, financial conditions, results of operations, and prospects.

If we are unable to successfully obtain rights to required third party intellectual property rights or maintain the existing intellectual property rights we have, we may have to

abandon commercialization of the relevant drug, or development of the relevant program or drug candidate, and our business, financial condition, results of operations, and prospects
could suffer.

Intellectual property rights do not necessarily address all potential threats.

The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations and may not adequately protect our

business or permit us to maintain our competitive advantage. For example:

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others may be able to make products similar to our approved drug or any of our drug candidates we may develop or utilize similarly related technologies that are not
covered by the claims of the patents that we license or may own in the future;

• we, or our license partners or current or future collaborators, might not have been the first to make the inventions covered by the issued patent or pending patent

application that we license or may own in the future;

• we, or our license partners or current or future collaborators, might not have been the first to file patent applications covering certain of our or their inventions;

•

•

•

•

others may independently develop similar or alternative technologies or duplicate any of our technologies without infringing, misappropriating, or otherwise violating any
of our owned or licensed intellectual property rights;

it is possible that our pending licensed patent applications or those that we may own in the future will not lead to issued patents;

issued patents that we hold rights to may be held invalid or unenforceable, including as a result of legal challenges by our competitors or other third parties;

our competitors or other third parties might conduct research and development activities in countries where we do not have patent rights and then use the information
learned from such activities to develop competitive products for sale in our major commercial markets;

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• we may not develop additional proprietary technologies that are patentable;

•

the patents of others may harm our business; and

• we may choose not to file a patent in order to maintain certain trade secrets or know how, and a third party may subsequently file a patent covering such intellectual

property.

Should any of these events occur, they could have a material adverse effect on our business, financial condition, results of operations, and prospects.

Risks Related to Patents

If we are unable to obtain and maintain sufficient patent protection for our approved drug or drug candidates, or if the scope of the patent protection is not sufficiently broad,
third parties, including our competitors, could develop and commercialize products similar or identical to ours, and our ability to commercialize our approved drug or drug
candidates successfully may be adversely affected.

Our success depends in large part on our ability to protect our proprietary technologies that we believe are important to our business, including pursuing and maintaining patent
protection intended to cover the composition of matter of our approved drug and drug candidates, for example, QINLOCK, vimseltinib, and DCC-3116, their methods of use, related
technologies, and other inventions that are important to our business. In addition to patent protection, we also rely on trade secrets to protect aspects of our business that are not
amenable to, or that we do not consider appropriate for, patent protection, including our proprietary switch-control kinase inhibitor platform. If we do not adequately obtain,
maintain, protect, or enforce our intellectual property, third parties, including our competitors, may be able to erode or negate any competitive advantage we may have and market
competition may increase, which could harm our business, reduce our potential revenues, and adversely affect our ability to achieve profitability.

The patent application and approval process is expensive, time-consuming, and complex. We may not be able to file and prosecute all necessary or desirable patent applications

at a reasonable cost or in a timely manner. It is also possible that we fail to identify patentable aspects of our research and development output before it is too late to obtain patent
protection.

Furthermore, the patent position of biotechnology and pharmaceutical companies generally is highly uncertain. No consistent policy regarding the breadth of claims allowed in

biotechnology and pharmaceutical patents has emerged to date in the U.S. or in many foreign jurisdictions. The standards applied by the USPTO and foreign patent offices in
granting patents are not always applied uniformly or predictably. In addition, the determination of patent rights with respect to pharmaceutical compounds commonly involves
complex legal and factual questions, which has in recent years been the subject of much litigation. As a result, the issuance, scope, validity, enforceability, and commercial value of
our patent rights are highly uncertain. Thus, we cannot offer any assurances about which, if any, patents will issue, the breadth of any such patents, whether any issued patents will be
found invalid and unenforceable or will be threatened by third parties or whether any issued patents will effectively prevent others from commercializing competing technologies and
drug candidates.

Our pending patent applications cannot be enforced against third parties practicing the technology claimed in such applications unless and until a patent issues from such
applications. Assuming the other requirements for patentability are met, currently, the first to file a patent application is generally entitled to the patent. However, prior to March 16,
2013, in the U.S, the first to invent was entitled to the patent. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in
the U.S. and other jurisdictions are typically not published until 18 months after filing, or in some cases not at all. Since patent applications in the U.S. and most other countries are
confidential for a period of time after filing, and some remain so until issued, we cannot be certain that we were the first to file or invent (prior to March 16, 2013) any patent
application related to our approved drug or drug candidates. In addition, we enter into non-disclosure and confidentiality agreements with parties who have access to confidential or
patentable aspects of our research and development output, such as our employees, collaborators, consultants, advisors, and other third parties; however, any of these parties may
breach the agreements and disclose such output before a patent application is filed, thereby jeopardizing our ability to seek patent protection. Furthermore, if third parties have filed
patent applications related to our approved drug, drug candidates, or technology, an interference proceeding in the U.S. can be initiated by the USPTO or a third party to determine
who was the first to invent any of the subject matter covered by the patent claims of our applications. Therefore, we cannot be certain that we were the first to make the inventions
claimed in our patents or pending patent applications, or that we were the first to file for patent protection of such inventions.

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Moreover, because the issuance of a patent is not conclusive as to its inventorship, scope, validity, or enforceability, our patents or pending patent applications may be
challenged in the courts or patent offices in the U.S. and abroad. There is no assurance that all of the potentially relevant prior art relating to our patents and patent applications has
been found, which could be used by a third party to challenge validity of our patents, to prevent a patent from issuing from a pending patent application. For example, we may be
subject to a third-party preissuance submission of prior art to the USPTO or become involved in post-grant review procedures, oppositions, derivations, revocation, reexaminations,
inter partes review, or interference proceedings, in the U.S. or elsewhere, challenging our patent rights or the patent rights of others. An adverse determination in any such challenge
may result in loss of exclusivity or in our patent claims being narrowed, invalidated, or held unenforceable, in whole or in part, which could limit our ability to stop others from using
or commercializing similar or identical technology and products or limit the duration of the patent protection of our technology and products. Such challenges also may result in
substantial cost and require significant time from our scientists and management, even if the eventual outcome is favorable to us. Any of the foregoing could have a material adverse
effect on our business, financial condition, results of operations, and prospects.

In addition, given the amount of time required for the development, testing, and regulatory review of new drug candidates, our patents protecting such drugs or drug candidates

might expire before or shortly after such drugs or drug candidates are commercialized. As a result, our intellectual property may not provide us with sufficient rights to exclude
others from commercializing products similar or identical to ours, including generic versions of such products. Moreover, some of our patents may in the future be co-owned with
third parties. If we are unable to obtain an exclusive license to any such third-party co-owners' interest in such patents or patent applications, such co-owners may be able to license
their rights to other third parties, including our competitors, and our competitors could market competing products and technology. In addition, we may need the cooperation of any
such co-owners of our patents in order to enforce such patents against third parties, and such cooperation may not be provided to us. Any of the foregoing could have a material
adverse effect on our competitive position, business, financial conditions, results of operations, and prospects.

Our pending and future patent applications may not result in patents being issued that protect our approved drug or drug candidates, in whole or in part, or which effectively
prevent others from commercializing competitive products. Changes in either the patent laws or interpretation of the patent laws in the U.S. and other countries may diminish the
value of our patents or narrow the scope of our patent protection. In addition, the laws of foreign countries may not protect our rights to the same extent or in the same manner as the
laws of the U.S. For example, European patent law restricts the patentability of methods of treatment of the human body more than U.S. law does.

Even if our patent applications issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors from competing with us
or otherwise provide us with any competitive advantage. Moreover, the coverage claimed in a patent application can be significantly reduced before the patent is issued and its scope
can be reinterpreted after issuance. Our competitors and other third parties may be able to circumvent our patents by developing similar or alternative technologies or products in a
non-infringing manner. Our competitors and other third parties may also seek approval to market their own products similar to or otherwise competitive with our products.
Alternatively, our competitors or other third parties may seek to market generic or biosimilar versions of any approved products and in so doing, claim that patents owned or licensed
by us are invalid, unenforceable, or not infringed. In these circumstances, we may need to defend or assert our patents, or both, including by filing lawsuits alleging patent
infringement. In any of these types of proceedings, a court or other agency with jurisdiction may find our patents invalid or unenforceable, or that our competitors are competing in a
non-infringing manner. Thus, even if we have valid and enforceable patents, these patents still may not provide protection against competing products or processes sufficient to
achieve our business objectives.

Furthermore, our patents may be subject to a reservation of rights by one or more third parties. For example, if any of our technologies are developed in the future with
government funding, the government may obtain certain rights in any resulting patents, including a non-exclusive license authorizing the government to use the invention or to have
others use the invention on its behalf. If the U.S. government then decides to exercise these rights, it is not required to engage us as its contractor in connection with doing so. These
rights may also permit the government to disclose our confidential information to third parties and to exercise march-in rights to use or allow third parties to use our licensed
technology. The government may also exercise its march-in rights if it determines that action is necessary because we failed to achieve practical application of the government-
funded technology, because action is necessary to alleviate health or safety needs, to meet requirements of federal regulations, or to give preference to U.S. industry. In addition, our
rights in such government-funded inventions may be subject to certain requirements to manufacture products embodying such inventions in the U.S. Any exercise by the government
of aforementioned proprietary rights could harm our competitive position, business, financial condition, results of operations, and prospects.

We will incur significant ongoing expenses in maintaining our patent portfolio. Should we lack the funds to maintain our patent portfolio or to enforce our rights against

infringers, we could be adversely impacted. Moreover, the failure of any patents

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that may issue to us or our licensors to adequately protect our drug, drug candidates, or technology could have an adverse impact on our business.

The term of our patents may be inadequate to protect our competitive position on our products.

Given the amount of time required for the development, testing, and regulatory review of new drug candidates, patents protecting such candidates might expire before or
shortly after such candidates are commercialized. Depending upon the timing, duration, and other factors relating to any FDA marketing approval we receive for our approved drug
or any of our drug candidates, one or more 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 Act. We have applied for patent term extension in the U.S. on patents covering QINLOCK and we expect to seek extensions of
patent terms in the U.S. for other drug candidates and, if available, in other countries where we are prosecuting patents. In the U.S., the Hatch-Waxman Act permits a patent term
extension of up to five years beyond the normal expiration of the patent as compensation for patent term lost during the regulatory review process. A patent term extension cannot
extend the remaining term of a patent beyond a total of 14 years from the date of product approval, only one patent may be extended and only those claims covering the approved
drug, a method for using it, or a method for manufacturing it may be extended, and the application for the extension must be submitted prior to the expiration of the patent. However,
the applicable authorities, including the FDA and the USPTO in the U.S., and any equivalent regulatory authority in other countries, may not agree with our assessment of whether
such extensions are available for our patents, may refuse to grant extensions to our patents, or may grant more limited extensions than we request. We may not be granted an
extension because of, for example, failing to exercise due diligence during the testing phase or regulatory review process, failing to apply within applicable deadlines, failing to apply
prior to expiration of relevant patents, or otherwise failing to satisfy applicable requirements. If we are unable to obtain patent term extension or the term of any such extension is less
than we request, our competitors and other third parties may be able to obtain approval of competing products following our patent expiration and 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. Any of the foregoing would have
a material adverse effect on our business, financial condition, results of operations, and prospects.

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

Periodic maintenance fees on any issued patent are due to be paid to the USPTO and patent offices in foreign countries in several stages over the lifetime of the patent. The
USPTO and patent offices in foreign countries require compliance with a number of procedural, documentary, fee payment, and other requirements during the patent application
process. In certain circumstances, we rely on our licensing partners to pay these fees due to U.S. and non-U.S. patent agencies and to comply with these other requirements with
respect to our licensed patents and patent applications. While an inadvertent 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 non-compliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of a patent or patent rights in
the relevant jurisdiction. Non-compliance events that could result in abandonment or lapse of a patent or patent application include, but are not limited to, failure to file non-
provisional applications claiming priority to our provisional applications by the statutory deadlines, failure to timely file national and regional stage patent applications based on an
international patent application, failure to respond to official actions within prescribed time limits, non-payment of fees, and failure to properly legalize and submit formal
documents. In such an event, our competitors and other third parties might be able to enter the market with similar or identical products or technology, which would have a material
adverse effect on our business, financial condition, results of operations, and prospects.

Changes to the patent law in the U.S. and other jurisdictions could diminish the value of patents in general, thereby impairing our ability to protect our products.

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 U.S. could increase the uncertainties and costs surrounding the prosecution of patent applications and the enforcement or defense of issued
patents. Recent patent reform legislation in the U.S. and other countries, including the Leahy-Smith America Invents Act (the Leahy-Smith Act), signed into law in September 2011,
could increase those uncertainties and costs. The Leahy-Smith Act includes a number of significant changes to U.S. patent law. These include provisions that affect the way patent
applications are prosecuted, redefine prior art, and provide more efficient and cost-effective avenues for competitors to challenge the validity of patents. For example, the Leahy-
Smith Act allows third-party submission of prior art to the USPTO during patent prosecution and additional procedures to attack the validity of a patent by USPTO administered
post-grant

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proceedings, including post-grant review, inter partes review, and derivation proceedings. In addition, the Leahy-Smith Act has transformed the U.S. patent system from a "first-to-
invent" system to a "first-to-file" system in which, assuming that other requirements for patentability are met, the first inventor to file a patent application will be entitled to the patent
on an invention regardless of whether a third party was the first to invent the claimed invention. The first-to-file provisions, however, only became effective on March 16, 2013.
Accordingly, it is not yet clear what, if any, impact the Leahy-Smith Act will have on the operation of our business. However, the Leahy-Smith Act and its implementation could
make it more difficult to obtain patent protection for our inventions and increase the uncertainties and costs surrounding the prosecution of our or our collaboration partners' patent
applications and the enforcement or defense of our or our collaboration partners' issued patents, all of which could harm our business, results of operations, financial condition, and
prospects.

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. Additionally, there have been recent proposals for additional changes to the patent laws of the U.S. and other countries that, if adopted,
could impact our ability to enforce our proprietary technology. 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.

ITEM 1B.    UNRESOLVED STAFF COMMENTS

None.

ITEM 2.    PROPERTIES

We currently lease a total of 82,346 rentable square feet of office space for our headquarters at 200 Smith Street, Waltham, Massachusetts (the Premises). The initial term of

our leases at the Premises will expire in November 2029 unless terminated earlier in accordance with the terms of the leases and we are entitled to two five-year options to extend the
leases. Our existing space is used primarily for our clinical development and operations, medical affairs, commercial, regulatory, business development, and administrative functions.

Additionally, we lease 50,320 square feet of laboratory, office, and storage space in Lawrence, Kansas, which is used primarily for discovery research, preclinical research and

non-clinical functions. The initial term of the leases in Lawrence, Kansas will expire on December 31, 2030 unless terminated earlier in accordance with the terms of the lease and
the Company is entitled to two five-year options to extend the leases. The described leased space in Lawrence, Kansas includes space for leases that are less than 12 months and
leases which had not commenced under Accounting Standards Codification (ASC) Topic 842, Leases (ASC 842), as of December 31, 2021, and as a result, these leases are not
reflected within the consolidated balance sheets. We expect these leases to commence in 2022.

We also lease 2,422 square feet of space in Zug, Switzerland for our European headquarters, to accommodate our needs for office space in supporting our European

commercialization efforts. The lease terms for such space are less than 12 months.

We believe that our existing office and laboratory space is sufficient to meet our needs for the foreseeable future and that suitable additional space will be available as and

when needed.

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

Certain Information Regarding the Trading of Our Common Stock

Our common stock trades under the symbol "DCPH" on the Nasdaq Global Select Market and has been publicly traded since September 28, 2017. Prior to this time, there was

no public market for our common stock.

Holders of Our Common Stock

As of January 31, 2022, there were approximately two holders of record of shares of our common stock. This number does not include stockholders for whom shares are held

in "nominee" or "street" name.

Dividends

We have never declared or paid any cash dividends on our capital stock. We currently intend to retain all available funds and any future earnings for use in the operation of our

business and do not anticipate paying any dividends on our common stock in the foreseeable future. Any future determination to declare dividends will be made at the discretion of
our board of directors and will depend on our financial condition, operating results, capital requirements, general business conditions, and other factors that our board of directors
may deem relevant.

Securities authorized for issuance under equity compensation plans

Information about our equity compensation plans will be included in our definitive proxy statement to be filed with the SEC with respect to our 2022 Annual Meeting of

Stockholders and is incorporated herein by reference.

Stock Performance Graph

The following performance graph and related information shall not be deemed to be "soliciting material" or to be "filed" with the SEC, for purposes of Section 18 of the
Exchange Act, nor shall such information be incorporated by reference into any future filing under the Exchange Act or Securities Act, except to the extent that we specifically
incorporate it by reference into such filing.

The following graph compares the performance of our common stock to the Nasdaq Composite Index and to the Nasdaq Biotechnology Index from September 28, 2017 (the
first date that shares of our common stock were publicly traded) through December 31, 2021. The comparison assumes $100 was invested in our common stock and in each of the
foregoing indices after

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the market closed on September 28, 2017, and it assumes reinvestment of dividends, if any. The stock price performance included in this graph is not necessarily indicative of future
stock price performance.

ITEM 6.    RESERVED

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 in conjunction with our consolidated financial statements and related
notes appearing at the end of this Form 10-K. Some of the information contained in this discussion and analysis or set forth elsewhere in this Form 10-K, including information with
respect to our plans and strategy for our business, includes forward looking statements that involve risks and uncertainties. As a result of many factors, including those factors set
forth in the "Risk Factors" section of this Form 10-K, our actual results could differ materially from the results described in, or implied by, the forward-looking statements contained
in the following discussion and analysis.

Overview

We are a biopharmaceutical company focused on discovering, developing, and commercializing important new medicines to improve the lives of people with cancer.

Leveraging our proprietary switch-control kinase inhibitor platform and deep expertise in kinase biology, we design kinase inhibitors to target the switch pocket region of the kinase
with the goal of developing potentially transformative medicines. Through our patient-inspired approach, we seek to develop a broad portfolio of innovative medicines to improve
treatment outcomes. QINLOCK, our switch-control kinase inhibitor, was engineered using our proprietary drug discovery platform and developed for the treatment of fourth-line
GIST. QINLOCK is approved in Australia, Canada, China, the EU, Hong Kong, Switzerland, Taiwan, the U.S., and the U.K. for the treatment of fourth-line GIST. We wholly own
QINLOCK and all of our drug candidates with the exception of a development and commercialization out-license agreement for QINLOCK in Greater China. In addition to
QINLOCK, we have identified and advanced multiple product candidates from our platform into clinical studies, including vimseltinib and DCC-3116.

We are focused on the commercialization of QINLOCK for the treatment of fourth-line GIST in the U.S., where we believe that QINLOCK has been established as the
standard of care. Following QINLOCK’s EC approval in fourth-line GIST in November 2021, we have decided to focus our direct commercial efforts on Germany and France. We
have launched QINLOCK in Germany and plan to transition to a post-approval paid access program in France in the first half of 2022, subject to program approval by the HAS. We
plan to provide access to QINLOCK to fourth-line GIST patients in additional European countries through other channels.

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We have two additional clinical-stage assets, vimseltinib and DCC-3116. In January 2022, we announced that enrollment was underway in our Phase 3 MOTION study for

vimseltinib, a CSF1R inhibitor, in patients with TGCT. Our Phase 1/2 study of vimseltinib in TGCT patients is ongoing and we expect to provide updated data in the second half of
2022. We are also advancing DCC-3116, our potential first-in-class drug candidate targeting the ULK kinase to inhibit autophagy. DCC-3116 is in the dose escalation phase of a
Phase 1 study in patients with mutant RAS and RAF cancers, and we expect to provide initial Phase 1 dose escalation data, as well as additional preclinical data on DCC-3116, in
2022. Following and subject to the selection of a recommended Phase 2 dose of DCC-3116 from the monotherapy dose escalation portion of the Phase 1 study of DCC-3116, we plan
to initiate the Phase 1 combination dose escalation cohorts with trametinib in 2022 and, subject to feedback from regulatory authorities, expand this study to add a combination with
a mutant KRAS G12C inhibitor in non-small cell lung cancer patients. In addition, we intend to continue to explore preclinical combinations of DCC-3116 with other agents. Finally,
we continue to invest in our next generation of research programs, which are designed to provide first-in-class or best-in-class treatments using our proprietary switch-control
inhibitor platform. Our goal for 2022 is to nominate a development candidate for our pan-RAF research program, which targets inhibition of BRAF and CRAF kinases.

Restructuring

In November 2021, we announced a corporate restructuring intended to prioritize clinical development of select programs, streamline commercial operations, maintain a focus

on discovery research, and extend our cash runway.

We intend to reduce expenses and extend our existing cash runway into 2024 through the following restructuring initiatives and prioritization of our pipeline:

• We implemented an organizational restructuring that resulted in a workforce reduction of approximately 35%, or approximately 140 positions. The restructuring affected

U.S. employees across all areas of the organization including the QINLOCK commercial team, research and development, and general and administrative support functions.

• We remain focused on the commercialization of QINLOCK for the treatment of fourth-line GIST in the U.S. with a reduced commercial team. In Europe, we maintain a

limited direct commercial presence that support the launch of QINLOCK in two key markets, Germany and France, and work to provide access to QINLOCK in additional
European countries through other channels. Further clinical development of QINLOCK will be discontinued, including the Phase 1b/2 MEK combination study, which had
been planned to start in the fourth quarter of 2021.

• We are prioritizing the clinical development of our vimseltinib and DCC-3116 programs, discontinuing the development of the rebastinib program, and continuing with a

focused investment in our next generation of research programs, designed to provide first-in-class or best-in-class treatments for patients.

◦ Vimseltinib: We initiated the Phase 3 MOTION study for vimseltinib, an orally administered, potent, and highly selective switch-control kinase inhibitor of

CSF1R, for the treatment of TGCT in December 2021.

◦ DCC-3116: We continue to advance the clinical development of DCC-3116, a potential first-in-class ULK kinase inhibitor designed to inhibit autophagy for the
treatment of patients with advanced or metastatic tumors with a mutant RAS or RAF gene. DCC-3116 is currently being investigated as a single agent and in
combination with trametinib in an ongoing Phase 1 study. We expect to present initial data from the dose escalation phase of the Phase 1 study in 2022. In addition
to the ongoing Phase 1 study, we are actively exploring preclinical combinations of DCC-3116 with multiple additional targeted oncology agents with diverse
mechanisms of action.

◦

◦

Rebastinib: We discontinued development of rebastinib, which was expected to enter a Phase 3 study in patients with platinum-resistant ovarian cancer in 2022.

Research: We intend to continue to invest in the development of new product candidates using our novel switch-control inhibitor approach.

As a result of the restructuring, we recognized a one-time charge in the fourth quarter of 2021 of approximately $26.2 million. This charge includes approximately $9.8 million

of employee-related termination costs and approximately $16.4 million of discontinuation costs such as contract termination fees and non-cancellable commitments related to the
rebastinib and ripretinib programs.

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Our Drug and Drug Candidates

QINLOCK

QINLOCK, an orally administered kinase switch control inhibitor of the KIT and PDGFRA kinases, is approved in nine territories for the treatment of advance GIST.

Following the Phase 3 INVICTUS study of QINLOCK in fourth-line GIST which met its primary endpoint of improved PFS versus placebo, on May 15, 2020, QINLOCK was

approved by the FDA for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib. In May
2020, we launched QINLOCK commercially in the U.S. In 2020, QINLOCK was also approved for the treatment of fourth-line GIST in Canada and Australia. In November 2020,
we announced that we had entered into exclusive distribution agreements for QINLOCK in Canada, Israel, Australia, New Zealand, Singapore, Malaysia, and Brunei. In November
2021, we announced that the EC approved QINLOCK in the EU for the treatment of adult patients with GIST who have received prior treatment with three or more kinase inhibitors,
including imatinib. The EC decision is applicable to all 27 EU member states plus Iceland, Norway, and Liechtenstein. In 2021, QINLOCK was also approved for the treatment of
fourth-line GIST in Switzerland and the U.K.

In June 2019, we entered into the Zai License Agreement, pursuant to which we granted Zai exclusive rights to develop and commercialize QINLOCK, including certain
follow-on compounds (the Licensed Products), in Greater China. In March and September 2021, the China NMPA and the Taiwan Food and Drug Administration, respectively,
approved QINLOCK for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib. In March
2021, the Hong Kong Department of Health approved QINLOCK in Hong Kong for the treatment of adult patients with advanced GIST who have received prior treatment with
imatinib, sunitinib, and regorafenib.

In November 2021, we announced top-line data from INTRIGUE, our Phase 3 study of QINLOCK for the treatment of second-line GIST. The INTRIGUE study did not meet
the primary endpoint of improved PFS compared with the standard of care sunitinib. The study did not achieve the primary efficacy endpoint of PFS as determined by independent
radiologic review using modified RECIST. The INTRIGUE Phase 3 clinical study is an interventional, randomized, global, multicenter, open-label study to evaluate the efficacy and
safety of QINLOCK compared to sunitinib in patients with GIST previously treated with imatinib. In the study, 453 patients were randomized 1:1 to either QINLOCK 150 mg once
daily or sunitinib 50 mg once daily for four weeks followed by two weeks without sunitinib.

We are focused on the commercialization of QINLOCK for the treatment of fourth-line GIST in the U.S., where we believe QINLOCK is the standard of care. Following
QINLOCK’s EC approval in fourth-line GIST in November 2021, we have decided to focus our direct commercial efforts on Germany and France. We have launched QINLOCK in
Germany and plan to transition to a post-approval paid access program in France in the first half of 2022, subject to program approval by the HAS. We plan to provide access to
QINLOCK to fourth-line GIST patients in additional European countries through other channels. Further clinical development of QINLOCK has been discontinued.

Vimseltinib

Vimseltinib is an investigational, orally administered, potent, and highly-selective switch-control kinase inhibitor of the colony stimulating factor 1 receptor (CSF1R). We are
currently studying vimseltinib in a pivotal Phase 3 study in patients with TGCT (MOTION study). The MOTION study is a two-part, randomized, double-blind, placebo-controlled
study to assess the efficacy and safety of vimseltinib in patients with TGCT who are not amenable to surgery. In Part 1 of the study, eligible study participants will be assigned to
receive either vimseltinib or matching placebo for 24 weeks. Participants assigned to placebo in Part 1 will have the option to receive vimseltinib for Part 2 of the study. Part 2 is a
long-term treatment phase in which all participants will receive open-label vimseltinib. In January 2022, we announced that enrollment is currently underway in our Phase 3
MOTION study.

We are also conducting an international, multicenter, ongoing open-label Phase 1/2 study designed to evaluate the safety, efficacy, PK, and PD of vimseltinib in patients with
solid tumors and TGCT. In September 2021, at the ESMO Congress 2021, we announced data from patients with TGCT in both the Phase 1 dose escalation portion of the study and
from cohort A in the Phase 2 dose expansion portion of the study.

Cohort A includes TGCT patients with no prior anti-CSF1/CSF1R (previous therapy with imatinib or nilotinib is eligible) and cohort B includes patients with prior anti-
CSF1/CSF1R (previous therapy with imatinib or nilotinib alone is not eligible). As GIST and TGCT have significant overlap in the key opinion leaders and treating physicians, we
believe our QINLOCK commercial infrastructure provides a strong foundation for a potential vimseltinib product, if approved.

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In November 2021, we also announced that vimseltinib had been granted fast track designation by the FDA for the treatment of patients with TGCT who are not amenable to

surgery.

DCC-3116

DCC-3116 is a potential first-in-class investigational, orally administered, potent, and highly selective switch-control inhibitor of the ULK kinase. DCC-3116 is designed to

inhibit autophagy, a key tumor survival mechanism in cancer cells, by inhibiting the ULK kinases, referred to collectively as ULK or ULK kinases, which have been shown to be the
initiating factors that activate autophagy. We believe that DCC-3116, in combination with RTK/RAS/MAP kinase signaling pathway inhibition, has the potential to change the
treatment of mutant RTK/RAS/RAF cancers, if approved.

DCC-3116 is being studied in a Phase 1 study designed to evaluate the safety, tolerability, clinical activity, PK, and PD of DCC-3116 as a single agent and in combination with

trametinib, an FDA approved MEK inhibitor, in patients with advanced or metastatic tumors with a RAS or RAF mutation.

Coronavirus (COVID-19)

The full extent to which the COVID-19 pandemic, or the future outbreak of any other highly infectious or contagious diseases, may impact our business, including our
preclinical studies, clinical trial operations, or commercialization efforts will depend on continuously changing circumstances, which are highly uncertain and cannot be predicted at
this time, such as the duration of such pandemic including future waves of infection, new strains of the virus that causes COVID-19, or the impact of effective vaccines, the actions
taken to contain the pandemic or mitigate its impact, and the direct and indirect economic effects of the pandemic and containment measures, among others. The ongoing fluidity of
this situation precludes any prediction as to the full impact of the COVID-19 pandemic but it could have a material adverse effect on our business, financial condition, and results of
operations. The COVID-19 pandemic may also have the effect of heightening the risks to which we are subject, including various aspects of our preclinical studies and ongoing
clinical trials, the reliance on third parties in our supply chain for materials and manufacturing of our drug and drug candidates, disruptions in health regulatory agencies' operations
globally, the volatility of our common stock, our ability to access capital markets, and our ability to successfully commercialize and generate revenue from QINLOCK.

We are continuing to assess the long-term impact of COVID-19 on our business operations in an effort to mitigate interruption to our clinical programs, research efforts,
commercialization of QINLOCK, and other business activities and to ensure the safety and well-being of our employees, as well as the physicians and patients participating in our
clinical studies. COVID-19 infections continue to fluctuate in the U.S. and in many countries worldwide as local surges and new waves of infection continue to be reported, in
particular as caused by new variants of the virus that causes COVID-19 and the lack of availability of effective vaccines in certain countries or regions, or failure to utilize available
vaccines in other geographies. Although some of the restrictions aimed at minimizing the spread of COVID-19 have been and may from time to time be eased or lifted in the U.S.
and other countries from the height of the pandemic, in response to local surges and waves of infection, including those caused by certain variants of the virus, some countries, states,
and local governments have maintained or reinstituted these restrictions, or may reinstitute these restrictions from time to time, in response to rising rates of infection. In response to
the COVID-19 pandemic, we have implemented precautionary measures to protect the health and safety of our employees, partners, and patients, including encouraging all
employees, other than those engaged in laboratory research activities, to work-from-home, and requiring adherence to onsite occupancy limits and appropriate safety measures
designed to comply with federal, state, and local guidelines. These safety measures may be eased, lifted, or reinstituted in accordance with updates to such guidelines.

Our ability to successfully commercialize and generate revenue from QINLOCK may be adversely affected by the impact of the COVID-19 pandemic. While restrictive safety

measures are in place, limited hospital access for non-patients, including our sales personnel, social distancing requirements, and precautionary measures due to COVID-19 may
impact the ability of our sales personnel to interact in-person with customers in the same manner as they did before the COVID-19 pandemic. In response, we have implemented a
virtual sales model to supplement traditional means of customer engagement. Although some of these restrictions have been, and may continue to be lifted in certain healthcare
institutions, the impact of prior and continued COVID-19 related safety measures, and the potential for reimposition of restrictions due to local surges and new waves of infection,
including those caused by certain variants of the virus, may adversely affect the ability of our sales professionals to effectively market QINLOCK to physicians, which may have a
negative impact on our sales and our market penetration. The persistence of the COVID-19 pandemic could also impact the patient treatment paradigm and how patients are
diagnosed and monitored. In addition, in the U.S. we are utilizing various programs to help patients afford our products, including patient assistance programs for eligible patients.
Market disruption and higher levels of unemployment caused by the COVID-19 pandemic may lead to increased utilization of our patient assistance programs, which could reduce
revenues.

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In addition, we continue to actively monitor risks associated with potential interruptions to our clinical studies due to the impact of COVID-19 and are in frequent

communication with clinical study sites and contract research organizations (CROs). Some clinical trial sites have maintained or reinstituted restrictions on site visits by sponsors and
CROs, initiation of new trials, patient visits, and new patient enrollment as a result of COVID-19. While all of our studies remain open for enrollment, we have provided guidance to
our clinical trial sites that new patient enrollment may occur at sites where resources allow these patients to be safely enrolled and closely monitored and enrollment has slowed at, or
has been or may in the future be temporarily paused for new patients in some sites. In addition, we continue to work closely with our study sites and CROs to allow for utilization of
remote and local assessments, such as televisits, in accordance with FDA and EMA guidance, as well as to ensure availability of study drug for patients. While study activities are
continuing in the clinical trials we have underway in sites across the globe, and although some of these restrictions have been, and may from time to time, be eased or lifted, we
cannot guarantee that COVID-19 precautions, either now or in the future, or the impact of the pandemic, will not directly or indirectly affect the expected timelines for some of our
clinical trials.

In light of the changing circumstances surrounding the COVID-19 pandemic, the operating environment remains fluid and uncertain, and the full significance of the impact of

the COVID-19 outbreak on our business and the duration for which it may have an impact cannot be determined at this time.

Components of Our Results of Operations

Revenues

On May 15, 2020, QINLOCK was approved by the FDA for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase

inhibitors, including imatinib. Following FDA approval of QINLOCK, in May 2020, we commenced commercial sales of QINLOCK in the U.S. and began generating product
revenue. We may generate revenue in the future from a combination of product sales or payments from collaboration, distribution, or any potential additional license agreements that
we may enter into with third parties. We expect that our revenue in the foreseeable future will be derived primarily from sales of QINLOCK and, payments owed to us under the Zai
License Agreement and Zai Supply Agreement we entered into in June 2019 and February 2020, respectively, including royalty revenues under the Zai License Agreement and
revenues associated with the sales of commercial inventory to Zai under the Zai Supply Agreement following the approvals of QINLOCK in the PRC and Hong Kong in March
2021. We cannot provide assurance as to what extent we will generate revenue from the commercialization of QINLOCK or if, when, or to what extent we will generate revenue
from the commercialization and sale of our drug candidates for which we may receive marketing approval, if any. Additionally, we cannot provide assurance as to the extent of future
royalty payments, the timing of future milestone payments, or that we will achieve and receive any future milestone payments at all. We may never succeed in obtaining regulatory
approval for any drug or drug candidate other than QINLOCK.

Product Revenues, Net

Following the FDA approval of QINLOCK in May 2020, we commenced commercial sales of QINLOCK in the U.S. and began generating product revenue. During the years
ended December 31, 2021 and 2020, our only source of product revenues was from the sales of QINLOCK. Product revenues are recorded net of estimates of variable consideration.
Please read Note 2, Summary of Significant Accounting Policies, of these consolidated financial statements included in this Form 10-K for further details of the reserves recorded for
variable considerations.

Collaboration Revenues

For the years ended December 31, 2021, 2020, and 2019, collaboration revenues were associated with the Zai License Agreement and the Zai Supply Agreement, as

applicable.

Zai License Agreement
Pursuant to the terms of the Zai License Agreement, we received an upfront cash payment of $20.0 million and three development milestone payments totaling $12.0 million
and will be eligible to receive up to $173.0 million in potential development and commercial milestone payments, consisting of up to $38.0 million of development milestones and
up to $135.0 million of commercial milestones. In addition, during the term of the Zai License Agreement, Zai will be obligated to pay us tiered percentage royalties ranging from
low to high teens on annual net sales of the Licensed Products in the Territory, subject to adjustments in specified circumstances. Additionally, certain costs we incur associated with
the Zai License Agreement are reimbursed by Zai.

During the second quarter of 2021, following the approvals of QINLOCK in the PRC and Hong Kong in March 2021, we began recognizing royalty revenues under the Zai

License Agreement.

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Zai Supply Agreement

Pursuant to the terms of the Zai Supply Agreement, costs incurred by us for external manufacturing services associated with the production of QINLOCK for use in the
Territory for clinical trials and commercial inventory are reimbursed by Zai. During the second quarter of 2021, following the approvals of QINLOCK in the PRC and Hong Kong in
March 2021, we began recognizing revenues associated with sales of commercial inventory of QINLOCK under the Zai Supply Agreement.

Cost of Sales

Our cost of sales includes external costs of producing and distributing inventories that are related to product revenue during the respective period of the associated sales. In

addition, shipping and handling costs for product shipments are recorded in cost of sales as incurred. Further, cost of sales includes the external costs of producing and distributing
commercial inventories sold under the Zai Supply Agreement. Cost of sales also includes charges related to inventory written down as a result of excess, obsolescence,
unmarketability, or other reasons.

Cost of sales for newly launched products will not include the full cost of manufacturing until the initial pre-launch inventory is depleted, and additional inventory is
manufactured and sold. The gross margin on sales of QINLOCK for the years ended December 31, 2021 and 2020 was enhanced by sales of the initial pre-launch inventory, and
therefore, use of active pharmaceutical ingredients and components that were previously expensed as research and development expenses prior to the launch of QINLOCK, referred
to as zero cost inventories. However, we do not expect that the cost of sales as a percentage of net sales of QINLOCK will increase significantly after we have sold all zero cost
inventories and commenced the sales of inventories which will reflect the full cost of manufacturing.

Operating Expenses

The successful development and commercialization of our drug and drug candidates is highly uncertain. This is due to the numerous risks and uncertainties, including the

following:

•

•

•

•

•

•

continuing to establish sales, marketing, and distribution capabilities to support the commercial launch of QINLOCK or our drug candidates, if and when approved,
whether alone or in collaboration with others such as Zai, our licensee for QINLOCK in Greater China;

successful completion of preclinical studies and clinical trials;

receipt and related terms of marketing approvals from applicable regulatory authorities;

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

developing and implementing marketing and reimbursement strategies;

raising additional funds necessary to fund ongoing operations and capital expenditure requirements, including to complete clinical development of and commercialize any
current or future drug candidates for which we receive approval;

• making arrangements with third-party manufacturers, or establishing manufacturing capabilities, for both clinical and commercial supplies of our drug and drug

candidates;

• maintaining a continued acceptable safety profile of our products following approval.

•

•

•

•

obtaining and maintaining patent, trade secret and other intellectual property protection, and regulatory exclusivity for our drug and drug candidates;

protecting and enforcing our rights in our intellectual property portfolio;

effectively competing with other therapies; and

attracting additional licensees and/or collaborators or distributors with development, regulatory, and commercialization expertise.

A change in the outcome of any of these variables with respect to the commercialization of QINLOCK or the development of any of our drug candidates would significantly

change the costs and timing associated with the commercialization of QINLOCK or development of that drug candidate. We may never succeed in obtaining regulatory approval for
any of our drug candidates other than QINLOCK.

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Research and Development Expenses

Research and development expenses consist primarily of costs incurred for our research activities, including our drug discovery efforts and the development of our drug and

drug candidates, which include:

•

•

•

•

employee-related expenses, including salaries, related benefits, travel, and stock-based compensation expense for employees engaged in research and development
functions;

expenses incurred in connection with the preclinical and clinical development of our drug candidates, including under agreements with CROs;

the cost of consultants and contract manufacturing organizations (CMOs) that manufacture drug products for use in our preclinical studies and clinical trials as well as all
expenses associated with the pre-launch manufacturing of commercial inventory of QINLOCK prior to FDA approval; and

facilities, depreciation, and other expenses, which include direct and allocated expenses for rent and maintenance of facilities, insurance, supplies, and technology-related
costs.

We expense research and development costs to operations as incurred. Advance payments for goods or services to be received in the future for use in research and development

activities are recorded as prepaid expenses within our consolidated balance sheets. The prepaid amounts are expensed as the related goods are delivered or the services are
performed.

Our direct research and development expenses are tracked on a program-by-program basis and consist primarily of external costs, such as fees paid to consultants, central

laboratories, contractors, CMOs, and CROs in connection with our preclinical and clinical development activities. Additionally, during the year ended December 31, 2021, certain
costs incurred in connection with our corporate restructuring were included in research and development expense. We do not allocate employee costs, costs associated with our
proprietary switch-control kinase inhibitor platform technology or facility expenses, including depreciation or other indirect costs, to specific drug or drug candidate development
programs because these costs are deployed across multiple drug or drug candidate development programs and, as such, are not separately classified.

Research and development activities are central to our business model. Drugs and drug candidates in later stages of clinical development generally have higher development

costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials. We expect research and development expenses
associated with vimseltinib and DCC-3116 will increase in 2022 as our drug and drug candidate development programs progress. However, we expect research and development
expenses will decrease overall as compared to 2021 due to the cost reduction measures included in the corporate restructuring implemented in the fourth quarter of 2021. We do not
believe that it is possible at this time to accurately project total program-specific expenses through commercialization. There are numerous factors associated with the successful
commercialization of our drug and any of our drug candidates, including future trial design and various regulatory requirements, many of which cannot be determined with accuracy
at this time based on our stage of development. Additionally, future commercial and regulatory factors beyond our control will impact our clinical development programs and plans.

Selling, General, and Administrative Expenses

Selling, general, and administrative expenses consist primarily of salaries and related costs, including stock-based compensation, for personnel in executive, legal, finance,

commercial, human resources, and administrative functions. Selling, general, and administrative expenses also include direct and allocated facility- and technology-related costs as
well as professional fees for legal, patent, consulting, accounting, and audit services. Additionally, during the year ended December 31, 2021, certain costs incurred in connection
with our corporate restructuring were included in selling, general, and administrative expenses.

We anticipate that our selling, general, and administrative expenses will decrease overall due to the cost reduction measures included in the corporate restructuring

implemented in the fourth quarter of 2021, despite increased selling, general, and administrative expenses to be incurred related to the launch of QINLOCK in Germany and France
in 2022. We also anticipate that we will continue to incur accounting, audit, legal, regulatory, compliance, and investor and public relations expenses associated with the business and
continued operations as a public company.

Restructuring

We have made estimates and judgments regarding the amount and timing of our restructuring expense and liability, including current and future period termination benefits,
pipeline program termination costs and other exit costs to be incurred when related actions take place. Restructuring charges are reflected in our consolidated statements of income
within research and development expense and selling, general, and administrative expense. Actual results may differ from these estimates.

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Other Income (Expense)

Interest and Other Income, net

Interest income consists of interest earned on our cash, cash equivalents, and marketable securities balances. Other income, net, consists of insignificant amounts of

miscellaneous income and expenses unrelated to our core operations, including the impacts of foreign currency exchange differences.

Interest Expense

Interest expense for the year ended December 31, 2019 consisted of interest expense associated with a previously outstanding construction loan from a related party. The

outstanding balance of the construction loan from a related party was repaid in December 2019, and there was therefore no interest expense during the years ended December 31,
2021 and 2020.

Income Taxes

On October 2, 2017, immediately prior to the completion of our initial public offering (IPO), we engaged in a series of transactions whereby Deciphera Pharmaceuticals, LLC

became a wholly owned subsidiary of Deciphera Pharmaceuticals, Inc., a Delaware corporation (the Conversion). Prior to the Conversion, we were treated as a partnership for tax
purposes and had not been subject to U.S. federal or state income taxation. Upon the Conversion, we became subject to typical corporate U.S. federal and state income taxation;
however, we do not have net operating loss (NOL) carryforwards from periods prior to October 2, 2017 available to offset taxable income earned in future periods in which we will
be treated as a corporation.

Since the Conversion in October 2017, we have not recorded any U.S. federal, state or foreign income tax benefits for either the net losses we have incurred or our earned

research and orphan drug credits, due to the uncertainty of realizing a benefit from those items in the future. As of December 31, 2021, we had NOL carryforwards for federal
income tax purposes of $870.9 million, of which $16.6 million begin to expire in 2037 and $854.3 million may be carried forward indefinitely but are subject to an 80% limitation.
As of December 31, 2021, we had NOL carryforwards for state income tax purposes of $688.8 million, which begin to expire in 2035. We also had federal and state research and
orphan drug credits of $36.6 million and $4.5 million, respectively, as of December 31, 2021, which begin to expire in 2037 and 2032, respectively. We also had foreign NOL
carryforwards of $19.3 million as of December 31, 2021, which will begin to expire in 2026.

Critical Accounting Policies and Significant Judgments and Estimates

Our consolidated financial statements are prepared in accordance with generally accepted accounting principles in the U.S. (GAAP). The preparation of our consolidated
financial statements and related disclosures requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues, costs and expenses, and the
disclosure of contingent assets and liabilities in our consolidated financial statements. We base our estimates on historical experience, known trends and events, and various other
factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not
readily apparent from other sources. We evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates under different assumptions
or conditions.

While our significant accounting policies are described in more detail in Note 2, Summary of Significant Accounting Policies, of these consolidated financial statements
included in this Form 10-K, we believe that the following accounting policies are those most critical to the judgments and estimates used in the preparation of our consolidated
financial statements.

Product Revenue Reserves

We recognize product revenues, net of variable consideration related to certain allowances and accruals, when the customer takes control of the product, which is typically

upon delivery to the customer. Product revenue is recorded at the net sales price, or transaction price. We record product revenue reserves, which are classified as a reduction in
product revenues, to account for the components of variable consideration. Variable consideration includes the following components: chargebacks, government rebates, trade
discounts and allowances, product returns, and other incentives, which are described below.

These reserves are based on estimates of the amounts earned or to be claimed on the related sales and are classified as reductions of accounts receivable (if the amount is

payable to our customer) or a liability (if the amount is payable to a party other than our customer). Our estimates of reserves established for variable consideration are calculated
based upon a consistent application of the expected value method, which is the sum of probability-weighted amounts in a range of possible consideration amounts. These estimates
reflect our historical experience, current contractual and statutory requirements, specific known market

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events and trends, industry data, forecasted customer buying, and payment patterns. The amount of variable consideration that is included in the transaction price may be subject to
constraint and is included in net product revenues only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized will not occur in
a future period. Actual amounts of consideration received may ultimately differ from our estimates. If actual results vary, we adjust these estimates, which could have an effect on
earnings in the period of adjustment.

Chargebacks and administrative fees: Chargebacks for discounts represent our estimated obligations resulting from contractual commitments to sell product to qualified

healthcare providers and government agencies at prices lower than the list prices charged to the customers who directly purchase the product from us. The customers charge us for
the difference between what the customers pay us for the product and the customer's ultimate contractually committed or government required lower selling price to the qualified
healthcare providers. As part of our contractual commitments to sell product to qualified healthcare providers, we pay fees for administrative services, such as account management
and data reporting.

Government rebates: Government rebates consist of Medicare, Tricare, Medicaid, and other governmental rebates. These reserves are recorded in the same period the related

revenue is recognized. For Medicare, we also estimate the number of patients in the prescription drug coverage gap for whom we will owe a rebate under the Medicare Part D
program.

Trade discounts and allowances: We provide customers with discounts that are explicitly stated in contracts and recorded in the period the related product revenue is

recognized. In addition, we also receive sales order management, inventory management, and data services from customers in exchange for certain fees.

Product returns: We estimate the amount of our product sales that may be returned by our customers and record this estimate in the period the related product revenue is

recognized. We currently estimate product return liabilities based on available industry data and our visibility into the inventory remaining in the distribution channel.

Other incentives: Other incentives include co-payment assistance provided to qualified patients, whereby we may provide financial assistance to patients with prescription

drug co-payments required by the patient's insurance provider. Reserves for co-payment assistance are recorded in the same period the related revenue is recognized.

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. This process involves

reviewing open contracts and purchase orders, communicating with our applicable personnel to identify services that have been performed on our behalf, and estimating the
associated cost incurred for the services when we have not yet been invoiced or otherwise notified of actual costs. The majority of our service providers invoice us in arrears for
services performed, on a pre-determined schedule or when contractual milestones are met; however, some require advance payments. We make estimates of our accrued expenses as
of each balance sheet date in the consolidated financial statements based on facts and circumstances known to us at that time. We periodically confirm the accuracy of the estimates
with the service providers and make adjustments if necessary. Examples of estimated accrued research and development expenses include fees paid to:

•

•

•

•

vendors in connection with the preclinical development activities;

CMOs in connection with the production of preclinical and clinical trial materials;

CROs in connection with preclinical and clinical studies; and

investigative sites in connection with clinical trials.

We base our expenses related to preclinical studies and clinical trials on our estimates of the services received and efforts expended pursuant to quotes and contracts with

multiple research institutions and CROs that conduct and manage preclinical studies and clinical trials on our behalf. The financial terms of these agreements are subject to
negotiation, vary from contract to contract and may result in uneven payment flows. There may be instances in which payments made to our vendors will exceed the level of services
provided and result in a prepayment of the expense. 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. If the actual timing of the performance of services or the level of effort varies from the estimate, we adjust the accrual or prepaid expense accordingly. Although we
do not expect our estimates to be materially different from amounts actually incurred, our understanding of the status and timing of services performed relative to the actual status
and timing of services performed may vary and may result in reporting amounts that are too high or too low in any particular period. To date, there have not been any material
adjustments to our prior estimates of accrued research and development expenses.

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Stock-Based Compensation

We measure all stock option awards granted to employees and directors based on the fair value on the date of the grant and recognize compensation expense of those awards

over the requisite service period, which is generally the vesting period of the respective award. The straight-line method of expense recognition is applied to all awards with service-
only conditions. We account for forfeitures as they occur.

We estimate the fair value of each stock option award using the Black-Scholes option-pricing model, which uses as inputs the fair value of our common stock and assumptions
we make for the volatility of our common stock, the expected term of our stock-based awards, the risk-free interest rate for a period that approximates the expected term of our stock-
based awards, and our expected dividend yield. Prior to October 2017, we were a privately-held company and lacked company-specific historical and implied volatility information.
Therefore, we estimate our expected volatility based on the historical volatility of a set of our publicly traded peer companies as well as the limited historical volatility of our own
traded stock price. We estimate the expected term of our options using the "simplified" method for awards that qualify as "plain-vanilla" options. The risk-free interest rate is
determined by reference to the U.S. Treasury yield curve in effect at the time of grant of the award for time periods approximately equal to the expected term of the award. Expected
dividend yield is based on the fact that we have never paid cash dividends on common stock and do not expect to pay any cash dividends in the foreseeable future.

The assumptions used in determining the fair value of stock-based awards represent our best estimates, but the estimates involve inherent uncertainties and the application of
our judgment. As a result, if factors change and we use significantly different assumptions or estimates, our stock-based compensation expense could be materially different in the
future.

Results of Operations

Comparison of the Years Ended December 31, 2021, 2020, and 2019

The following table summarizes our results of operations for the years ended December 31, 2021, 2020, and 2019:

(in thousands)
Revenues:

Product revenues, net
Collaboration revenues
Total revenues

Cost and operating expenses:

Cost of sales
Research and development
Selling, general, and administrative

Total cost and operating expenses

Loss from operations
Other income (expense):

Interest and other income, net
Interest expense

Total other income (expense), net

Net loss

Revenues

Product Revenues, Net

2021

Year Ended December 31,
2020

2019

87,389 
8,759 
96,148 

2,932 
257,040 
136,253 
396,225 
(300,077)

113 
— 
113 
(299,964)

$

$

39,461 
2,626 
42,087 

225 
198,970 
114,082 
313,277 
(271,190)

4,701 
— 
4,701 
(266,489)

$

$

— 
25,000 
25,000 

— 
157,610 
68,116 
225,726 
(200,726)

8,537 
(67)
8,470 
(192,256)

$

$

During the years ended December 31, 2021 and 2020, our only source of product revenues was from the sales of QINLOCK, which commenced in the U.S. in May 2020
following the FDA approval of QINLOCK on May 15, 2020 and during 2020 and 2021 in certain other jurisdictions following regulatory approval or on a named patient basis.

During the years ended December 31, 2021 and 2020, net product revenues by geography consisted of the following:

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(in thousands)
U.S.
Rest of world

Total product revenues, net

Year Ended December 31,

2021

2020

$

$

81,476  $
5,913 
87,389  $

37,989 
1,472 
39,461 

For the year ended December 31, 2021 compared to the same period in 2020, net product revenues increased $47.9 million primarily due to full quarters of sales in the U.S. in
the first and second quarters of 2021 compared to a partial quarter of sales in the U.S. in the second quarter of 2020 and increased sales volume in the U.S. during the third and fourth
quarters of 2021 compared to the same periods in 2021 as we continued our commercialization efforts.

Collaboration Revenues

For the year ended December 31, 2021 compared to the same period in 2020, collaboration revenues increased $6.1 million primarily due to an increase in milestone revenues

of $3.0 million and the commencement of royalty revenues under the Zai License Agreement as well as the commencement of revenues under the Zai Supply Agreement in the
second quarter of 2021. The increase in milestone revenues was due to the recognition of a $5.0 million development milestone in the first quarter of 2021 associated with the
approval of QINLOCK for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib, by the
China NMPA in March 2021, compared to the recognition of a $2.0 million development milestone in the second quarter of 2020. Following the approvals of QINLOCK in the PRC
and Hong Kong in March 2021, we began recognizing revenues associated with the sales of commercial inventory of QINLOCK under the Zai Supply Agreement and began
recognizing royalty revenues under the Zai License Agreement. The first sales of commercial inventory under the Zai Supply Agreement and first royalty revenues under the Zai
License Agreement were recognized during the second quarter of 2021.

For the year ended December 31, 2020 compared to the same period in 2019, collaboration revenues decreased $22.4 million, primarily due to the recognition of up-front and

development milestone payments of $20.0 million and $5.0 million, respectively, associated with the Zai License Agreement, entered into in June 2019, in the second quarter of 2019
as compared to the recognition of a $2.0 million development milestone payment associated with the Zai License Agreement in the second quarter of 2020. The decrease in up-front
and milestone payments were partially offset by revenues recognized associated with external manufacturing services for clinical trial use under the Zai Supply Agreement and
reimbursements for services provided under the Zai License Agreement during the year ended December 31, 2020.

Cost of Sales

We began incurring costs of product sales during the year ended December 31, 2020 upon commencing the commercialization of QINLOCK in the U.S. We began incurring

costs of collaboration sales during the year ended December 31, 2021 upon commencing sales of commercial inventory of QINLOCK under the Zai Supply Agreement.

During the years ended December 31, 2021 and 2020, cost of sales by type consisted of the following:

(in thousands)
Cost of product sales
Cost of collaboration sales

Total cost of sales

Year Ended December 31,

2021

2020

$

$

1,305  $
1,627 
2,932  $

225 
— 
225 

For the year ended December 31, 2021 compared to the same period in 2020, cost of sales increased $2.7 million primarily due to the costs of commercial inventory of
QINLOCK sold under the Zai Supply Agreement, which began in the second quarter of 2021, as well as increased product sales of QINLOCK driven by full quarters of sales in U.S.
in the first and second quarters of 2021 compared to a partial quarter of sales in the U.S. in the second quarter of 2020 and increased sales volume in the U.S. during the third and
fourth quarters of 2021 compared to the same periods in 2020. During the year ended December 31, 2021, cost of sales also included a charge of less than $0.1 million for inventory
written down as a result of excess, obsolescence, unmarketability, or other reasons. Cost of sales associated with product sales of QINLOCK was primarily related to the sales of zero
cost inventories, which consisted of packaging, labeling, shipping, and distribution costs. As a result, the full costs of manufacturing QINLOCK inventory are not included in cost of
sales during the years ended December 31, 2021 and 2020.

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Prior to receiving FDA approval for QINLOCK in May 2020, we manufactured inventory to be sold and recorded approximately $6.0 million related to this inventory build-up

as research and development expense. During the years ended December 31, 2020 and 2019, we recorded approximately $1.0 million and $5.0 million, respectively, of such costs
related to the build-up of this inventory as research and development expense. We did not record any such costs related to the build-up of this inventory as research and development
expense during the year ended December 31, 2021.

Utilizing the actual direct costs to manufacture QINLOCK prior to receiving FDA approval, had the previously expensed inventory been capitalized and recognized when sold,

the total cost of sales with these manufacturing costs included for the year ended December 31, 2021 would have increased by approximately $1.9 million and $0.6 million in the
prior year comparative period.

We do not expect our cost of sales for QINLOCK to increase significantly as a percentage of net sales in future periods as we continue to produce inventory for future sales,

which will reflect the full cost of manufacturing, and then sell such inventory. We expect to continue to sell the zero cost inventories of QINLOCK in the U.S. during 2022.

Operating Expenses

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Research and Development Expenses

QINLOCK

For the year ended December 31, 2021 compared to the same period in 2020, research and development expenses related to QINLOCK decreased primarily as a result of
decreased clinical trial expenses of $9.5 million and decreased manufacturing expenses of $3.5 million, partially offset by restructuring charges incurred in the fourth quarter of 2021
of $10.9 million related to the termination of agreements and the discontinuation of the Phase 1b/2 MEKi combination study. Clinical trial expenses for QINLOCK decreased
primarily as a result of decreased expenses associated with INTRIGUE, which we initiated in December 2018 and for which we announced "top-line" results in November 2021, and
INVICTUS, which we initiated in January 2018 and for which announced top-line results in August 2019. Manufacturing expenses for the QINLOCK program decreased primarily
as a result of activities to support drug requirements for commercialization during the months prior to commencing capitalization of inventory following the FDA approval of
QINLOCK on May 15, 2020.

For the year ended December 31, 2020 compared to the same period in 2019, research and development expenses related to QINLOCK decreased primarily as a result of a
decrease in clinical trial expenses of $6.1 million. The decrease in clinical trial expenses was primarily due to decreased expenses associated with our pivotal Phase 3 study in fourth-
line and fourth-line plus GIST, INVICTUS, which we initiated in January 2018 and announced top-line results from in August 2019. In addition, clinical trial expenses decreased due
to decreased expenses associated with our ongoing Phase 1 study of QINLOCK and decreased expenses associated with clinical pharmacology studies. These decreases were
partially offset by increased expenses related to our pivotal Phase 3 study in second-line GIST, INTRIGUE, which we initiated in December 2018 and completed enrollment of which
in December 2020.

Vimseltinib

For the year ended December 31, 2021 compared to the same period in 2020, expenses related to our vimseltinib program increased primarily as a result of increases in clinical

trial expenses of $7.8 million and manufacturing costs of $4.2 million. Clinical trial expenses increased primarily due to start-up activities associated with our Phase 3 study of
vimseltinib in patients with TGCT, MOTION, which we initiated in the fourth quarter of 2021, increased activities associated with our ongoing Phase 1/2 study of vimseltinib to
assess the safety, efficacy, pharmacokinetics, and pharmacodynamics in patients with TGCT, and increased clinical pharmacology study activities. Manufacturing costs for the
vimseltinib program increased as a result of increased activities to support clinical trials.

For the year ended December 31, 2020 compared to the same period in 2019, expenses related to our vimseltinib program increased primarily as a result of increases in clinical

trial expenses of $4.1 million, manufacturing costs of $2.7 million, and preclinical costs of $0.8 million. The increase in clinical trial expenses was primarily due to increased
activities associated with the dose escalation portion of our ongoing Phase 1/2 study of vimseltinib to assess the safety, tolerability, PK, and PD in patients with TGCT.
Manufacturing costs for the vimseltinib program increased as a result of increased activities to support clinical trials. The increase in preclinical costs was primarily due to increased
ongoing studies.

Rebastinib

For the year ended December 31, 2021 compared to the same period in 2020, expenses related to our rebastinib program primarily increased as a result of restructuring charges
incurred in the fourth quarter of 2021 of $5.5 million due to the decision to discontinue the rebastinib program and an increase in manufacturing costs of $1.1 million, partially offset
by decreases in clinical trial expenses of $3.9 million. The increase in manufacturing costs is primarily due to manufacturing completed in advance of performing late stage
development and registration readiness activities for the drug candidate as it was moving towards a potential pivotal trial in 2022 prior to discontinuation of the program in the fourth
quarter of 2021 The decrease in clinical trial expenses was primarily associated with our Phase 1b/2 trial of rebastinib in combination with paclitaxel due to the completion of
enrollment of multiple cohorts in the trial, including completion of enrollment in Part 2, Stage 2 of both the endometrial and platinum-resistant ovarian cancer cohorts, as announced
in February 2021.

For the year ended December 31, 2020 compared to the same period in 2019, expenses related to our rebastinib program increased primarily as a result of increases in
manufacturing costs of $1.9 million and clinical trial expenses of $1.7 million. Manufacturing costs for the rebastinib program increased as a result of increased activities to support
clinical trials. The increases in clinical trial expenses were due to our Phase 1b/2 study of rebastinib in combination with paclitaxel, which we initiated in October 2018 and moved to
Part 2 of the Phase 1b/2 study in the second quarter of 2019, and our second Phase 1b/2 study of rebastinib in combination with carboplatin, which we initiated in January 2019 and
moved to Part 2 of the Phase 1b/2 study in January 2020.

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DCC-3116

For the year ended December 31, 2021 compared to the same period in 2020, expenses related to our DCC-3116 program changed as we completed preclinical studies,
submitted our IND, and initiated our first clinical trial for DCC-3116 in the second quarter of 2021. For the year ended December 31, 2021 compared to the same period in 2020, the
changes in expenses resulted in increases in clinical trial expenses of $2.0 million and manufacturing costs of $1.1 million associated with our Phase 1 study of DCC-3116, partially
offset by decreased preclinical activities, including IND-enabling studies, of $1.8 million.

For the year ended December 31, 2020 compared to the same period in 2019, expenses related to our DCC-3116 program increased primarily as a result of an increase in
preclinical activities of $1.4 million, including IND-enabling studies, associated with a full year of activities for this drug candidate, which we announced as an addition to our
pipeline in June 2019, and increased manufacturing costs of $1.1 million to support our Phase 1 study of DCC-3116, which was initiated in the second quarter of 2021.

Preclinical

For the year ended December 31, 2021 compared to the same period in 2020, the increase in preclinical costs of $8.6 million, were primarily due to a $4.0 million upfront
payment to Sprint to in-license our preclinical program VPS34, pursuant to the Sprint Agreement during the third quarter of 2021 in addition to increased activities for our early-
stage drug research programs. For further details on the Sprint Agreement, please read Note 11, In-License Agreement, to the consolidated financial statements included in this Form
10-K.

For the year ended December 31, 2020 compared to the same period in 2019, the increase in preclinical costs was primarily due to increased costs of $3.3 million in connection

with increased activities for our early-stage drug research programs.

Unallocated expenses

For the year ended December 31, 2021 compared to the same period in 2020, the increase in unallocated research and development expenses was related to personnel-related
costs and other research and development costs. The increase in personnel-related costs was primarily due to an increase in headcount and stock-based compensation expense in our
research and development functions as well as restructuring expense of $5.9 million. Personnel-related costs for the years ended December 31, 2021 and 2020 included stock-based
compensation expense of $20.7 million and $17.4 million, respectively. The increase in stock-based compensation expense was primarily related to headcount increases, a higher
value of our common stock in the first half of 2021 resulting in increased valuations of share-based awards granted to our employees, partially offset by $1.9 million of expenses
related to the achievement of vesting events associated with performance-based restricted stock units during the year ended December 31, 2020. The increase in other research and
development costs was primarily due to increased costs for temporary staffing of $3.6 million to support our research and development functions as well as $3.1 million of other
development and manufacturing costs that support multiple clinical and early-stage research programs.

For the year ended December 31, 2020 compared to the same period in 2019, the increase in unallocated research and development expenses was related to personnel-related
costs and other research and development costs. The increase in personnel-related costs was primarily due to an increase in headcount and stock-based compensation expense in our
research and development functions. Personnel-related costs for the years ended December 31, 2020 and 2019 included stock-based compensation expense of $17.4 million and $7.9
million, respectively. The increase in stock-based compensation expense was primarily related to headcount increases, a higher value of our common stock resulting in increased
valuations of share-based awards granted to our employees, and $1.9 million of expenses related to the achievement of vesting events associated with performance-based restricted
stock units during the year ended December 31, 2020. The increase in other research and development costs is primarily due to increased costs for temporary staffing of $2.5 million
to support our research and development functions.

We expect research and development expenses associated with vimseltinib and DCC-3116 will increase in 2022 as we continue to invest in the development of these programs.

However, we expect research and development expenses will decrease overall as compared to 2021 due to the cost reduction measures included in the corporate restructuring
implemented in the fourth quarter of 2021.

Selling, General, and Administrative Expenses

For the year ended December 31, 2021 compared to the same period in 2020, the increase in selling, general, and administrative expenses was primarily associated with
personnel-related costs and professional and consultant fees. For the year ended December 31, 2021 compared to the same period in 2020, the increases in personnel-related costs,
including increases in

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stock-based compensation of $5.7 million, were primarily a result of increases in headcount in our selling, general, and administrative functions as well as restructuring expense of
$4.0 million. The increases in professional and consultant fees were primarily due to an increase in various advisory and temporary staffing fees, including those related to
establishing a direct commercial infrastructure and commercialization preparedness in Germany and France to support the launch of QINLOCK in Europe.

For the year ended December 31, 2020 compared to the same period in 2019, the increase in selling, general, and administrative expenses was related to personnel-related
costs, professional and consultant fees, and other selling, general, and administrative costs. The increase in personnel-related costs was primarily a result of an increase in headcount
and an increase in stock-based compensation expense in our selling, general, and administrative functions. Personnel-related costs for the years ended December 31, 2020 and 2019
included stock-based compensation expense of $19.7 million and $12.5 million, respectively. The increase in stock-based compensation expense was primarily related to an increase
in headcount and a higher value of our common stock resulting in increased valuations of share-based awards granted to our employees, partially offset by the modification of stock
options pursuant to the transition agreement with our former President and Chief Executive Officer resulting in $2.4 million of expenses during the year ended December 31, 2019.
The increase in professional and consultant fees was primarily due to an increase in various advisory fees, including those related to commercialization preparedness and the launch
of QINLOCK. The increase in other selling, general, and administrative costs was primarily due to a full year of expenses, including those related to rent and depreciation expenses,
associated with our new headquarters (the Premises) that commenced in October 2019 (the Initial Space) and rent, depreciation, and moving expenses associated with our lease at the
Premises that commenced in July 2020 (the Additional Space) as well as technology-related costs to support the growth of the business. For additional information on our leases at
the Premises, please read Note 7, Leases, to the consolidated financial statements included in this Form 10-K.

We anticipate that our selling, general, and administrative expenses will decrease overall due to the cost reduction measures included in the corporate restructuring

implemented in the fourth quarter of 2021, despite increased selling, general, and administrative expenses to be incurred related to the launch of QINLOCK in Germany and France
in 2022.

Interest and Other Income, Net

For the year ended December 31, 2021 compared to the same period in 2020, the decrease in interest and other income, net, was primarily due to decreases in interest income

earned on our cash equivalents and marketable securities associated with our decrease in marketable securities and holdings of lower yield investments during the year ended
December 31, 2021.

For the year ended December 31, 2020 compared to the same period in 2019, the decrease in interest and other income, net, was primarily due to decreases in interest income

earned on our cash equivalents and marketable securities associated with our holdings of lower yield investments during the year ended December 31, 2020.

Inflation

Inflation generally affects us by increasing our cost of labor. We do not believe that inflation had a material effect on our business, financial condition, or results of operations

during the years ended December 31, 2021, 2020, and 2019.

Liquidity and Capital Resources

Since our inception in 2003, we have focused substantially all of our efforts and financial resources on organizing and staffing our company, business planning, raising capital,

developing product and technology rights, conducting research and development activities for our drug candidates, building a commercial and marketing organization, and
commercializing our first approved product, QINLOCK. Our only product approved for sale is QINLOCK, and we have not generated sufficient revenues to result in a profit.

As a result, we have incurred significant operating losses since our inception. We have generated limited revenue to date primarily from our product sales and under our Zai

License Agreement and Zai Supply Agreement. On May 15, 2020, QINLOCK was approved by the FDA for the treatment of adult patients with advanced GIST who have received
prior treatment with three or more kinase inhibitors, including imatinib. Following the FDA approval of QINLOCK, in May 2020, we commenced commercial sales of QINLOCK in
the U.S. and began generating product revenue. During the years ended December 31, 2021 and 2020, our product revenues were primarily derived from sales of QINLOCK in the
U.S. We have also entered into exclusive distributor arrangements to facilitate product sales of QINLOCK in select geographies where we do not currently intend to distribute
QINLOCK on our own. During the second quarter of 2021, following the approvals of QINLOCK in the PRC and Hong Kong in March 2021, we also began to recognize royalty
revenues under the Zai License Agreement. However, we cannot provide

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assurance as to what extent we will generate revenue from the commercialization of QINLOCK by us or our partners. We do not expect to generate revenue from sales of any drug
candidates in the near future, if at all, unless and until we obtain marketing approval for, and begin to sell, such drug candidates. We may never generate revenues that are significant
enough to achieve profitability.

On October 2, 2017, we completed the IPO of our common stock. Since October 2017, we have primarily supported our operations by completing public issuances of our

common stock through our IPO, subsequent follow-on offerings, and an Open Market Sale Agreement℠ (the Sales Agreement) with Jefferies LLC (Jefferies). Through such
issuances, we have sold and issued 29,669,386 shares of our common stock resulting in net proceeds of $956.5 million after deducting commissions and other offering expenses.

In August 2020, we entered into the Sales Agreement with Jefferies, pursuant to which we may issue and sell shares of our common stock having aggregate offering proceeds
of up to $200.0 million (the Shares) from time to time through Jefferies as our sales agent. Upon delivery of a placement notice and subject to the terms and conditions of the Sales
Agreement, Jefferies may sell the Shares by any method permitted by law deemed to be an "at the market offering" as defined in Rule 415(a)(4) promulgated under the Securities Act
of 1933, as amended. We may sell the Shares in amounts and at times to be determined by us from time to time subject to the terms and conditions of the Sales Agreement, but we
have no obligation to sell any Shares under the Sales Agreement. We or Jefferies may suspend or terminate the offering of Shares upon notice to the other party and subject to other
conditions. As of December 31, 2021, there was $172.5 million available for future issuance under the Sales Agreement.

Public issuances of our common stock and shares issued pursuant to the underwriters' partial or full exercises of options to purchase additional shares of common stock, if

applicable, associated with our IPO, subsequent follow-on offerings, and issuances of shares pursuant to the Sales Agreement have been summarized in the following table:

(in
millions, except
share and per
share amounts)

IPO
June
2018 Follow-on
Public Offering

Third

Quarter of 2019
Follow-on
Public Offering
February
2020 Follow-on
Public Offering
Issuances

Pursuant to the
Sales
3
Agreement

Shares Issued in Public Offering

Shares Issued Pursuant to The Underwriters' Exercise
of Options to Purchase Additional Shares of Common Stock
(if applicable)

Total

Price per

Share¹

Date
October

Shares

Issued

Net Proceeds²

$

17.00 

2, 2017

7,500,000

$

114.1 

2017

June 11,

Date
October 4,

June 20,

Shares

Issued

Net Proceeds²

Shares

Issued

Net Proceeds²

666,496

$

10.5 

8,166,496

$

124.6 

40.00 

2018

4,300,000

161.0 

2018

645,000

24.3 

4,945,000

185.3 

August

September

37.00 

19, 2019

10,810,810

375.4 

3, 2019

1,621,621

56.4 

12,432,431

February

February

55.00 

19, 2020

3,181,818

163.7 

25, 2020

477,272

24.7 

3,659,090

431.8 

188.4 

3
Various

3
Various

466,369 

26.4

Not applicable

Total

466,369
29,669,386

26.4 
956.5 

$

1.

2.
3.

The price per share presented above represents the price per share at which shares were sold for both the public offering of shares and the underwriters' exercise of options to purchase additional
shares, if applicable.
Proceeds are presented net of underwriting discounts and commissions and other offering expenses.
Information presented above represents the total number of shares of our common stock issued, and total net proceeds from issuances of shares of our common stock, pursuant to the Sales
Agreement through December 31, 2021. Shares issued pursuant to the Sales Agreement were sold on multiple days at varying prices.

Cash Flows

As of December 31, 2021, our principal sources of liquidity were cash, cash equivalents, and marketable securities of $327.6 million, which consisted of cash, money market

funds, U.S. government securities, commercial paper, corporate debt securities, and certificates of deposit. The primary objectives of our investment activities are to preserve
principal, provide liquidity, and maximize income without significantly increasing risk. Given the nature of these investments, we believe that the market for these instruments is not
illiquid.

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The following table summarizes our sources and uses of cash and cash equivalents for each of the periods presented:

(in thousands)
Net cash flows used in operating activities
Net cash flows provided by (used in) investing activities
Net cash flows provided by financing activities

Net (decrease) increase in cash and cash equivalents

Operating Activities

2021

(240,824)
176,848 
14,890 
(49,086)

$

$

December 31,
2020

$

$

(239,683)
28,459 
226,801 
15,577 

$

$

2019

(149,296)
(460,522)
436,374 
(173,444)

During the year ended December 31, 2021 compared to the same period in 2020, net cash used in operating activities increased $1.1 million, primarily resulting from an
increase in our net loss of $33.5 million and increases in net cash outflows related to changes in our operating assets and liabilities of $14.7 million, partially offset by increases in net
non-cash charges of $17.7 million. Net non-cash charges increased primarily due to an increase in share-based compensation of $8.9 million. The increase in net cash flows related to
changes in our operating assets and liabilities were generally due to the timing of vendor invoicing and payments and settlement of accounts receivable.

During the year ended December 31, 2020 compared to the same period in 2019, net cash used in operating activities increased $90.4 million, primarily resulting from an

increase in our net loss of $74.2 million and increases in net cash outflows related to changes in our operating assets and liabilities of $38.6 million, partially offset by increases in
non-cash charges of $22.5 million. The increase in net cash outflows related to changes in our operating assets and liabilities was primarily due to an increase in accounts receivable
of $13.9 million and an increase in inventory of $3.2 million. The increases in accounts receivable and inventory were primarily associated with sales of QINLOCK and the
commencement of the capitalization of QINLOCK inventory, respectively, following the FDA approval of QINLOCK in May 2020. Other net cash outflows related to changes in our
operating assets and liabilities were generally due to the timing of vendor invoicing and payments. Net non-cash charges increased primarily due to an increase in share-based
compensation of $16.7 million.

Investing Activities

During the year ended December 31, 2021 compared to the same period in 2020, net cash flows provided by investing activities increased $148.4 million, primarily resulting

from a decrease in purchases of marketable securities, partially offset by a decrease in proceeds from sales and maturities of marketable securities and a $4.0 million upfront payment
to Sprint pursuant to the Sprint Agreement during the third quarter of 2021. For further details on the Sprint Agreement, please read Note 11, In-License Agreement, to the
consolidated financial statements included in this Form 10-K.

During the year ended December 31, 2020 compared to the same period in 2019, net cash flows provided by investing activities increased $489.0 million, resulting from an

increase in proceeds from sales and maturities of marketable securities of $770.1 million, partially offset by an increase in purchases of marketable securities of $279.6 million. The
increase in net sales and maturities of marketable securities was partially offset by increases in our restricted investments of $1.2 million, which was made up of a $1.0 million
increase to the letter of credit for our leases at the Premises associated with the commencement of the Additional Space and a $0.6 million increase to our Company credit card limit
to support the growth of our business during the year ended December 31, 2020 compared to an increase of $0.4 million to secure a Company credit card during the same period in
2019, and an increase in purchases of property and equipment of $0.4 million primarily associated with moving into the Additional Space.

Financing Activities

During the year ended December 31, 2021 compared to the same period in 2020, net cash flows provided by financing activities decreased $211.9 million, primarily resulting

from a decrease in net proceeds from offerings of our common stock of $197.9 million and a decrease in proceeds from stock option exercises and employee stock purchase plan
activity of $14.0 million. Net of underwriting discounts and commissions and other offering costs, the decrease in proceeds from our offerings was due to our issuance in February
2020 of $188.4 million and our issuances in the fourth quarter of 2020 under the Sales Agreement of $17.9 million as compared to our issuances under the Sales Agreement during
the year ended December 31, 2021 of $8.5 million.

During the year ended December 31, 2020 compared to the same period in 2019, net cash flows provided by financing activities decreased $209.6 million, primarily resulting

from a decrease in net proceeds from public offerings of our common

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stock of $225.2 million, partially offset by an increase in proceeds from the exercise of stock options and employee stock purchase plans of $14.5 million, which was primarily due to
increased stock option exercises associated with vesting of increased share-based awards as a result of headcount growth, and a $1.3 million decrease in repayments associated with a
previous note payable to a related party, which was not outstanding during the year ended December 31, 2020 due to the early repayment of the outstanding balance of the note
payable to a related party in December 2019. Net of underwriting discounts and commissions and other offering costs, the decrease in proceeds from our public offerings was due our
issuance in the third quarter of 2019 of $431.8 million as compared to our issuance in February 2020 of $188.4 million and our issuance in the fourth quarter of 2020 under the Sales
Agreement of $17.9 million.

Funding Requirements

Our ability to generate product revenues sufficient to achieve profitability will depend heavily on the successful commercialization of QINLOCK and the development and

eventual commercialization of one or more of our drug candidates. Our net loss was $300.0 million, $266.5 million, and $192.3 million for the years ended December 31, 2021,
2020, and 2019, respectively. As of December 31, 2021, we had an accumulated deficit of $1.1 billion. We expect to continue to incur significant expenses and operating losses for
the foreseeable future. We expect that our expenses and capital requirements will continue in connection with our ongoing activities, particularly as we:

•

•

•

•

•

•

continue to commercialize QINLOCK in the U.S., and continue to build our global commercial capability as we actively prepare to bring QINLOCK to eligible patients
around the world, including in key European markets;

continue with our ongoing and planned clinical programs for vimseltinib as a potential single agent therapy for the treatment of TGCT;

develop DCC-3116, our ULK kinase inhibitor, for the potential treatment of mutant RAS or RAF cancers;

continue research and development and drug discovery activities and initiate additional clinical trials;

seek marketing approval for our drug or any of our drug candidates that successfully complete clinical development;

develop and scale up our capabilities to support our ongoing preclinical activities and clinical trials for our drug candidates and commercialization of any of our drug
candidates for which we obtain marketing approval;

• make payments, if any, pursuant to any license or collaboration agreement we may enter into, including those associated with the Sprint Agreement;

• maintain, expand, protect, and enforce our intellectual property portfolio; and

• maintain our operational, financial, and management systems and personnel, including to support our clinical development and commercialization efforts and our

operations as a public company, including international operations in key European markets and other potential geographies.

As we continue to seek regulatory approval for our drug candidates, we expect to incur significant expenses related to our ongoing clinical development efforts and activities

related to maintaining and expanding our internal commercialization capability to support product sales, marketing, and distribution except to the extent we enter into a
commercialization partnership that covers such expenses. Further, we expect to continue to incur costs associated with operating as a public company.

As a result, we will need substantial additional funding to support our continuing operations and pursue our growth strategy. Even if we are able to generate substantial product
sales of QINLOCK, we may not become profitable. Until we become profitable, if ever, we expect to finance our operations primarily through a combination of equity, debt, or other
financings, collaborations, strategic alliances, and marketing, distribution, or additional licensing arrangements. We may be unable to raise additional funds or enter into such other
agreements or arrangements when needed on favorable terms, or at all. Market volatility resulting from the COVID-19 pandemic or other factors could also adversely impact our
ability to access capital as and when needed. If we are unable to raise additional funds through equity or debt financings or other arrangements when needed, we may be required to
delay, limit, reduce, or terminate our research, product development, or commercialization efforts or grant rights to develop and market drugs and drug candidates that we would
otherwise prefer to develop and market ourselves.

To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of existing equity holders will be diluted, and the

terms of these securities may include liquidation or other preferences that adversely affect the rights of common stockholders. Debt financing and preferred equity financing, if
available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making acquisitions or capital
expenditures, or declaring dividends. If we raise additional funds through collaborations, strategic alliances or marketing, distribution, or licensing arrangements with third parties
(such as the Zai License Agreement), we may

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have to relinquish valuable rights to our technologies, future revenue streams, research programs, drugs, or drug candidates, or grant licenses on terms that may not be favorable to
us.

Because of the numerous risks and uncertainties associated with pharmaceutical product development and commercialization, we are unable to accurately predict the timing or
amount of expenses and capital requirements or when or if we will be able to achieve or maintain profitability. If we fail to become profitable or are unable to sustain profitability on
a continuing basis, then we may be unable to continue our operations at planned levels and be forced to further reduce or terminate our operations. The timing and amount of our
operating expenditures will depend largely on:

•

•

•

•

•

•

•

•

•

•

the timing and progress of preclinical and clinical development activities;

successful enrollment in and completion of clinical trials;

the success of our commercialization efforts and market acceptance for QINLOCK or any of our future approved drugs;

the timing and outcome of regulatory review of our drug and drug candidates;

the cost to develop companion diagnostics as needed for each of our drug candidates;

our ability to establish and manage agreements with third-party manufacturers for clinical supply for our clinical trials and commercial manufacturing;

addition and retention of key research and development and commercial, including sales and marketing, personnel;

the costs and timing of commercialization activities, including product manufacturing, marketing, sales, and distribution, for QINLOCK, including our commercial launch
of QINLOCK in key European markets, and any of our drug candidates for which we obtain marketing approval;

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

the terms and timing of any collaboration, license, distribution, or other arrangement, including the terms and timing of any upfront, milestone, and/or royalty payments
thereunder.

We believe that our cash, cash equivalents, and marketable securities as of December 31, 2021 of $327.6 million, together with anticipated product, royalty, and supply
revenues, but excluding any potential future milestone payments under our collaboration or license agreements will enable us to fund our operating expenses and capital expenditure
requirements into 2024. We have based these estimates on assumptions that may prove to be wrong, and we could utilize our available capital resources sooner than we expect.

Contractual and Other Obligations

We have entered into arrangements that contractually obligate us to make payments that will affect our liquidity and cash flows in future periods. Such arrangements include

those related to our lease commitments and commercial supply agreements.

Lease Commitments

Our lease commitments reflect payments due for our lease agreements for office space at the Premises that expire in November 2029, laboratory, office, and storage space in

Lawrence, Kansas under lease agreements that expire in December 2030, and office space in key European markets to support European commercialization which have terms of less
than 12 months. As of December 31, 2021, our contractual commitments for our leases were $40.3 million, which will be paid over the term of such leases. The amount of lease
commitments reflects payments due for leases in Lawrence, Kansas that had not commenced under Accounting Standards Codification (ASC) Topic 842, Leases (ASC 842), as of
December 31, 2021, and as a result, these leases are not reflected within the consolidated balance sheets. We expect these leases to commence in 2022. For additional information on
our leases and timing of future payments, please read Note 7, Leases, to the consolidated financial statements included in this Form 10-K.

Commercial Supply Agreements

We have entered into commercial supply agreements related to the supply of QINLOCK that require us to make binding forecasts for a certain amount of purchases. The
related cancellation clauses would as a general matter require us to pay the full amount of these binding forecasts. As of December 31, 2021, our contractual commitments for such
obligations were $15.5 million, of which $14.5 million are expected to be paid within one year.

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Other Obligations

We enter into contracts in the normal course of business with various third parties for clinical trials, preclinical research studies, and testing, manufacturing, and other services
and products for operating purposes. These contracts provide for termination upon notice. Payments due upon cancellation generally consist only of payments for services provided
or expenses incurred, including non-cancellable obligations of our service providers, up to the date of cancellation. These payments have not been included separately within these
contractual and other obligations disclosures.

Recently Issued and Adopted Accounting Pronouncements

A description of recently issued accounting pronouncements that may potentially impact our financial position and results of operations is disclosed in Note 2, Summary of

Significant Accounting Policies, to our consolidated financial statements included in this Form 10-K.

ITEM 7A.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our cash, cash equivalents, and marketable securities as of December 31, 2021 consisted of cash, money market funds, U.S. government securities, commercial paper,
corporate debt securities, and certificates of deposit. The primary objectives of our investment activities are to preserve principal, provide liquidity, and maximize income without
significantly increasing risk. We have policies requiring us to invest in high-quality issuers, limit our exposure to any individual issuer, and ensure adequate liquidity. Our primary
exposure to market risk is interest income sensitivity, which is affected by changes in the general level of interest rates. Because of the general short-term nature of the instruments in
our portfolio, we believe that a sudden change in market interest rates would not be expected to have a material impact on our financial position or results of operations. A potential
change in fair value for interest rate sensitive instruments, which include marketable securities, has been assessed on a hypothetical 100 basis point adverse movement across all
maturities. As of December 31, 2021 and 2020, we estimate that such hypothetical 100 basis point adverse movement would result in a hypothetical loss in fair value of
approximately $2.4 million and $4.3 million, respectively, to our interest rate sensitive instruments.

We do not believe that our cash, cash equivalents, and marketable securities have significant risk of default or illiquidity. While we believe our cash, cash equivalents, and

marketable securities do not contain excessive risk, we cannot provide absolute assurance that in the future our investments will not be subject to adverse changes in market value,
including changes resulting from the impact of the COVID-19 pandemic. In addition, we maintain significant amounts of cash, cash equivalents, and marketable securities at one
financial institution that are in excess of federally insured limits.

We contract with vendors in foreign countries. As such, we have exposure to adverse changes in exchange rates of foreign currencies associated with our foreign transactions.

We believe this exposure to be immaterial. We do not hedge against this exposure to fluctuations in exchange rates.

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ITEM 8.    CONSOLIDATED FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

DECIPHERA PHARMACEUTICALS, INC.

Index to Consolidated Financial Statements

Report of Independent Registered Public Accounting Firm (PCAOB ID 238)
Consolidated Balance Sheets
Consolidated Statements of Operations and Comprehensive Loss
Consolidated Statements of Stockholders' Equity
Consolidated Statements of Cash Flows
Notes to Consolidated Financial Statements

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124
125
126
127
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To the Board of Directors and Stockholders of Deciphera Pharmaceuticals, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

Report of Independent Registered Public Accounting Firm

We have audited the accompanying consolidated balance sheets of Deciphera Pharmaceuticals, Inc. and its subsidiaries (the “Company”) as of December 31, 2021 and 2020, and the
related consolidated statements of operations and comprehensive loss, of shareholders' equity and of cash flows for each of the three years in the period ended December 31, 2021,
including the related notes (collectively referred to as the “consolidated financial statements”). We also have audited the Company's internal control over financial reporting as of
December 31, 2021, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway
Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2021 and
2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021 in conformity with accounting principles generally
accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31,
2021, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of
the effectiveness of internal control over financial reporting, included in Management’s Report on Internal Control Over Financial Reporting appearing under Item 9A. Our
responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting 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 audits to obtain reasonable assurance about whether
the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained
in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated 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
consolidated 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 consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial
reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our
audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies
and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii)
provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles,
and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable
assurance regarding

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prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future
periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may
deteriorate.

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be
communicated to the audit committee and that (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially
challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a
whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Accrued External Research and Development Expenses

As described in Notes 2 and 8 to the consolidated financial statements, the Company has entered into various research and development contracts with research institutions and other
companies both inside and outside of the U.S. Management records accruals for estimated ongoing research costs. Within accrued expenses and other current liabilities, management
has accrued $32.6 million of external research and development expenses as of December 31, 2021. When evaluating the adequacy of the accrued liabilities, management analyzes
progress of the studies or trials, including the phase or completion of events, invoices received, and contracted costs. As disclosed by management, this process involves reviewing
open contracts and purchase orders, communicating with applicable personnel to identify services that have been performed, and estimating the associated cost incurred for the
services when the Company has not yet been invoiced or otherwise notified of actual costs. Significant judgments and estimates are made in determining the accrued balances at the
end of the reporting period.

The principal considerations for our determination that performing procedures relating to accrued external research and development expenses is a critical audit matter are the
significant judgment by management in developing the estimate of costs incurred, which in turn led to a high degree of auditor judgment and effort in performing procedures to
evaluate management’s estimate of the cost incurred for the research and development activities and in evaluating the audit evidence obtained for these accrued external research and
development expenses.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These
procedures included testing the effectiveness of controls relating to accrued external research and development expenses. These procedures also included, among others (i) testing
management’s process for estimating accrued research and development expenses, (ii) testing the completeness and accuracy of the data used to develop the estimate related to actual
invoiced expenses, contractual rates for services, and patient services received, and (iii) evaluating the reasonableness of the estimated cost incurred for the services which have not
been invoiced.

/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
February 8, 2022

We have served as the Company’s auditor since 2009.

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DECIPHERA PHARMACEUTICALS, INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

Table of Contents

Assets
Current assets:

Cash and cash equivalents
Short-term marketable securities
Accounts receivable, net
Inventory
Prepaid expenses and other current assets

Total current assets

Long-term marketable securities
Long-term investments—restricted
Property and equipment, net
Operating lease assets

Total assets

Liabilities and Stockholders' Equity
Current liabilities:

Accounts payable
Accrued expenses and other current liabilities
Operating lease liabilities

Total current liabilities

Operating lease liabilities, net of current portion

Total liabilities

Commitments and contingencies (Note 16)
Stockholders' equity:

Preferred stock, $0.01 par value per share; 5,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.01 par value per share; 125,000,000 shares authorized; 58,549,644 shares and 57,596,144 shares issued and

outstanding as of December 31, 2021 and 2020, respectively

Additional paid-in capital
Accumulated other comprehensive income
Accumulated deficit

Total stockholders' equity

Total liabilities and stockholders' equity

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

124

December 31,

2021

2020

$

$

$

$

87,063  $
198,571 
20,595 
14,125 
18,660 
339,014 
41,950 
3,110 
8,610 
36,800 
429,484  $

13,130  $
80,773 
2,870 
96,773 
27,991 
124,764 

— 

585 
1,358,516 
51 
(1,054,432)
304,720 
429,484  $

135,897 
416,033 
13,896 
5,716 
12,489 
584,031 
9,375 
3,102 
9,583 
36,341 
642,432 

12,308 
55,227 
2,457 
69,992 
28,764 
98,756 

— 

576 
1,297,557 
11 
(754,468)
543,676 
642,432 

DECIPHERA PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(In thousands, except share and per share amounts)

Table of Contents

Revenues:

Product revenues, net
Collaboration revenues
Total revenues

Cost and operating expenses:

Cost of sales
Research and development
Selling, general, and administrative

Total cost and operating expenses

Loss from operations
Other income (expense):

Interest and other income, net
Interest expense

Total other income (expense), net

Net loss

Net loss per share—basic and diluted
Weighted average common shares outstanding—basic and diluted

Comprehensive loss:
Net loss
Other comprehensive income (loss):

Unrealized gains (losses) on marketable securities
Currency translation adjustment

Total other comprehensive income (loss)

Total comprehensive loss

Year Ended December 31,

2021

2020

2019

87,389  $
8,759 
96,148 

2,932 
257,040 
136,253 
396,225 
(300,077)

113 
— 
113 
(299,964) $

39,461  $
2,626 
42,087 

225 
198,970 
114,082 
313,277 
(271,190)

4,701 
— 
4,701 
(266,489) $

— 
25,000 
25,000 

— 
157,610 
68,116 
225,726 
(200,726)

8,537 
(67)
8,470 
(192,256)

(5.16) $

(4.78) $

(4.48)

58,084,325 

55,780,982 

42,869,058 

(299,964) $

(266,489) $

(192,256)

(278)
318 
40 

(299,924) $

(100)
— 
(100)
(266,589) $

111 
— 
111 
(192,145)

$

$

$

$

$

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

125

Common Shares

Shares
37,676,760  $

Amount

Additional 
Paid-in Capital

Accumulated
Other
Comprehensive
Income (Loss)

377  $

575,327  $

—  $

Accumulated
Deficit
(295,723) $

Table of Contents

DECIPHERA PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(In thousands, except share amounts)

Balance, December 31, 2018
Issuance of common stock sold in public offering, net of underwriting

discounts, commissions, and offering costs

Issuance of common stock under stock option and incentive plan
Stock-based compensation expense
Other comprehensive income
Net loss
Balance, December 31, 2019
Issuance of common stock sold in public offering, net of underwriting

discounts, commissions, and offering costs

Issuance of common stock under stock option and incentive and employee

stock purchase plans

Stock-based compensation expense
Other comprehensive loss
Net loss
Balance, December 31, 2020
Issuance of common stock sold, net of underwriting discounts,

commissions, and offering costs

Issuance of common stock under stock option and incentive and employee

stock purchase plans

Stock-based compensation expense
Other comprehensive income
Net loss
Balance, December 31, 2021

12,432,431 
1,508,448 
— 
— 
— 
51,617,639 

3,953,365 

2,025,140 
— 
— 
— 
57,596,144 

172,094 

781,406 
— 
— 
— 

58,549,644  $

124 
15 
— 
— 
— 
516 

40 

20 
— 
— 
— 
576 

2 

7 
— 
— 
— 
585  $

431,656 
6,426 
20,410 
— 
— 
1,033,819 

206,236 

20,365 
37,137 
— 
— 
1,297,557 

8,547 

6,334 
46,078 
— 
— 

1,358,516  $

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

126

Total
Stockholders'
Equity

279,981 

431,780 
6,441 
20,410 
111 
(192,256)
546,467 

— 
— 
— 
— 
(192,256)
(487,979)

— 

206,276 

— 
— 
— 
(266,489)
(754,468)

20,385 
37,137 
(100)
(266,489)
543,676 

— 

8,549 

— 
— 
— 
111 
— 
111 

— 

— 
— 
(100)
— 
11 

— 

— 
— 
40 
— 
51  $

— 
— 
— 
(299,964)
(1,054,432) $

6,341 
46,078 
40 
(299,964)
304,720 

 
 
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DECIPHERA PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

Cash flows from operating activities:

Net loss
Adjustments to reconcile net loss to net cash used in operating activities:

Stock-based compensation expense
Depreciation expense
Noncash lease expense
Acquired in-process research and development
Gain on disposal of equipment
Net accretion of discounts on marketable securities
Changes in operating assets and liabilities:

Accounts receivable
Inventory
Prepaid expenses and other current assets
Accounts payable
Accrued expenses and other current liabilities
Operating lease liabilities
Other long-term liabilities

Net cash flows used in operating activities

Cash flows from investing activities:
Purchases of marketable securities
Maturities of marketable securities
Sales of marketable securities
Purchases of property and equipment
Proceeds from sale of equipment
Acquired in-process research and development
Increase in restricted investments
Net cash flows provided by (used in) investing activities

Cash flows from financing activities:

Proceeds from offerings of common stock, net of underwriting discounts and commissions
Repayment of notes payable to related party
Payments of public offering costs
Proceeds from stock option exercises and employee stock purchase plan
Net cash flows provided by financing activities

Net (decrease) increase in cash and cash equivalents
Effect of exchange rate changes on cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period

Supplemental disclosure of cash flow information:

Cash paid for interest
Addition of operating lease asset included in accrued expenses and other current liabilities

Supplemental disclosure of non-cash investing and financing activities:

Purchases of property and equipment included in accounts payable and accrued expenses and other current liabilities
Unsettled exercise of stock options

$

$
$

$
$

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

127

2021

Year ended December 31,
2020

2019

$

(299,964)

$

(266,489)

$

(192,256)

46,078 
3,014 
3,446 
4,000 
— 
1,782 

(6,699)
(10,155)
(7,934)
833 
27,285 
(2,510)
— 
(240,824)

(335,375)
468,587 
49,613 
(1,970)
— 
(4,000)
(7)
176,848 

8,589 
— 
(40)
6,341 
14,890 
(49,086)
252 
135,897 
87,063 

— 
— 

71 
— 

$

$
$

$
$

37,137 
2,305 
2,834 
— 
(7)
(1,611)

(13,896)
(3,241)
(1,772)
(7,533)
13,923 
(1,333)
— 
(239,683)

(1,096,769)
627,913 
504,216 
(5,316)
7 
— 
(1,592)
28,459 

207,231 
— 
(815)
20,385 
226,801 
15,577 
— 
120,320 
135,897 

— 
— 

239 
— 

$

$
$

$
$

20,410 
830 
958 
— 
— 
(3,999)

— 
— 
(10,321)
10,862 
24,189 
(319)
350 
(149,296)

(817,142)
261,216 
100,780 
(4,935)
— 
— 
(441)
(460,522)

432,400 
(1,294)
(620)
5,888 
436,374 
(173,444)
— 
293,764 
120,320 

67 
562 

661 
553 

 
 
Table of Contents

DECIPHERA PHARMACEUTICALS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Nature of the Business and Basis of Presentation

Deciphera Pharmaceuticals, Inc. (the Company) is a biopharmaceutical company focused on discovering, developing, and commercializing important new medicines to
improve the lives of people with cancer. Leveraging its proprietary switch-control kinase inhibitor platform and deep expertise in kinase biology, the Company designs kinase
inhibitors to target the switch pocket region of the kinase with the goal of developing potentially transformative medicines. Through its patient-inspired approach, the Company seeks
to develop a broad portfolio of innovative medicines to improve treatment outcomes. QINLOCK is the Company's switch-control kinase inhibitor, was engineered using its
proprietary drug discovery platform and developed for the treatment of fourth-line GIST. QINLOCK is approved in Australia, Canada, China, the European Union (EU), Hong Kong,
Switzerland, Taiwan, the United States (U.S.), and the United Kingdom (U.K.) for the treatment of fourth-line GIST. The Company wholly owns QINLOCK and all of its drug
candidates with the exception of a development and commercialization out-license agreement for QINLOCK in Greater China. In addition to QINLOCK, the Company has identified
and advanced multiple product candidates from its platform into clinical studies, including vimseltinib and DCC-3116.

The Company is subject to risks and uncertainties common to companies in the biotechnology industry, including, but not limited to, development by competitors of new
technological innovations, dependence on key personnel, market acceptance and the successful commercialization of QINLOCK or any of the Company's current or future drug
candidates for which it receives marketing approval, protection of proprietary technology, ability to complete late-stage clinical trials, ability to obtain and maintain regulatory
approvals, compliance with government regulations, the impact of the novel coronavirus (COVID-19) pandemic on its operations, and the ability to secure additional capital to fund
operations. QINLOCK and the Company's drug candidates currently under development will require significant additional research and development efforts, including extensive
preclinical and/or clinical testing and regulatory approval. In addition to supporting its research and development efforts, the Company will be required to invest in the Company's
commercial capabilities and infrastructure, to support its commercialization of QINLOCK, the Company's first approved drug, and any current or future drug candidate for which the
Company obtains marketing approval. These efforts require significant amounts of additional capital, adequate personnel and infrastructure, and extensive compliance-reporting
capabilities. Even if the Company's drug development and commercialization efforts are successful, it is uncertain when, if ever, the Company will realize sufficient revenue to result
in a profit from product sales of QINLOCK or any current or future drug candidates for which it receives marketing approval.

The full extent to which the COVID-19 pandemic, or the future outbreak of any other highly infectious or contagious diseases, may impact the Company's business, including
its preclinical studies, clinical trial operations, or commercialization efforts will depend on continuously changing circumstances, which are highly uncertain and cannot be predicted
at this time, such as the duration of such pandemic including future waves of infection, new strains of the virus that causes COVID-19, or the impact of effective vaccines, the actions
taken to contain the pandemic or mitigate its impact, and the direct and indirect economic effects of the pandemic and containment measures, among others. The Company is
continuing to monitor the long-term impact of COVID-19, if any, on its financial condition and results of operations. The ongoing fluidity of this situation precludes any prediction
as to the full impact of the COVID-19 pandemic but it could have a material adverse effect on the Company's business, financial condition, and results of operations. The COVID-19
pandemic may also have the effect of heightening the risks to which the Company is subject, including various aspects of the Company's preclinical studies and ongoing clinical
trials, the reliance on third parties in the Company's supply chain for materials and manufacturing of the Company's drug and drug candidates, disruptions in health regulatory
agencies' operations globally, the volatility of the Company's common stock, and its ability to access capital markets, and the Company's ability to successfully commercialize and
generate revenue from sales of QINLOCK.

In the third quarter of 2019, the Company issued and sold 12,432,431 shares of its common stock in a follow-on public offering at a public offering price of $37.00 per share,

resulting in net proceeds of $431.8 million after deducting underwriting discounts and commissions and other offering expenses. In February 2020, the Company issued and sold
3,659,090 shares of its common stock in a follow-on public offering at a public offering price of $55.00 per share, resulting in net proceeds of $188.4 million after deducting
underwriting discounts and commissions and other offering expenses.

In August 2020, the Company entered into an Open Market Sale Agreement℠ (the Sales Agreement) with Jefferies LLC (Jefferies), pursuant to which the Company may issue
and sell shares of its common stock having aggregate offering proceeds of up to $200.0 million (the Shares) from time to time through Jefferies as its sales agent. Upon delivery of a
placement notice and subject to the terms and conditions of the Sales Agreement, Jefferies may sell the Shares by any method permitted by law deemed to be an "at the market
offering" as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended. The Company may sell the Shares in amounts and at times to be determined by the
Company from time to time subject to the terms

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and conditions of the Sales Agreement, but it has no obligation to sell any Shares under the Sales Agreement. The Company or Jefferies may suspend or terminate the offering of
Shares upon notice to the other party and subject to other conditions. During the years ended December 31, 2021 and 2020, the Company issued 172,094 shares resulting in net
proceeds of $8.5 million and 294,275 shares resulting in net proceeds of $17.9 million, respectively, after deducting commissions and other offering expenses under the Sales
Agreement. As of December 31, 2021, there was up to $172.5 million available for future issuance under the Sales Agreement.

The accompanying consolidated financial statements have been prepared on the basis of continuity of operations, realization of assets and the satisfaction of liabilities, and

commitments in the ordinary course of business. Since inception, the Company has incurred recurring losses including net losses of $300.0 million, $266.5 million, and $192.3
million for the years ended December 31, 2021, 2020, and 2019, respectively. As of December 31, 2021, the Company had an accumulated deficit of $1.1 billion. The Company
expects to continue to generate operating losses for the foreseeable future. The Company expects that its cash, cash equivalents, and marketable securities of $327.6 million as of
December 31, 2021 will be sufficient to fund its operating expenses and capital expenditure requirements through at least 12 months from the issuance date of these consolidated
financial statements. The future viability of the Company is dependent on its ability to raise additional capital to fund its operations.

The Company will need to obtain substantial additional funding in connection with continuing operations. If the Company is unable to raise capital when needed, or on

attractive terms, it could be forced to delay, reduce, or further terminate its research or drug development programs or certain commercialization efforts. Although management
continues to pursue these plans, there is no assurance that the Company will be successful in obtaining sufficient funding on terms acceptable to the Company to fund continuing
operations, if at all.

These consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been

eliminated.

These consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. (GAAP).

2. Summary of Significant Accounting Policies

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and

liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods.
Significant estimates and assumptions reflected in these consolidated financial statements include, but are not limited to, product revenue reserves, the accrual for research and
development expenses, and the valuation of stock-based option awards. Estimates are periodically reviewed in light of changes in circumstances, facts, and experience. Changes in
estimates are recorded in the period in which they become known. Actual results could differ from those estimates.

Segment Information

The Company manages its operations, and the Company's chief operating decision maker views the Company's business, as a single segment for the purposes of making
decisions on how to allocate resources and assessing performance. The Company's singular focus is discovering, developing, and delivering important new medicines to improve the
lives of people with cancer by tackling key mechanisms of drug resistance that limit the rate and/or durability of response to existing cancer therapies. The Company operates in the
U.S. and Europe. All of the Company's long-lived assets reside in the U.S.

Revenues

The Company 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. To determine revenue recognition for arrangements, the Company performs the following five steps: (i) identify the contract(s) with a
customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price, including variable consideration, if any; (iv) allocate the transaction price to
the performance obligations in the contract; and (v) recognize revenue when (or as) the

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Company satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration to which it is
entitled in exchange for the goods or services it transfers to the customer.

Product Revenues

In May 2020, the Company began generating product revenue from sales of QINLOCK to specialty distributors and specialty pharmacies in the U.S. following the approval of

QINLOCK by the FDA on May 15, 2020 for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including
imatinib.

The Company recognizes product revenues, net of variable consideration related to certain allowances and accruals, when the customer takes control of the product, which is
typically upon delivery to the customer. Product revenue is recorded at the net sales price, or transaction price. The Company records product revenue reserves, which are classified
as a reduction in product revenues, to account for the components of variable consideration. Variable consideration includes the following components: chargebacks, government
rebates, trade discounts and allowances, product returns, and other incentives, which are described below.

These reserves are based on estimates of the amounts earned or to be claimed on the related sales and are classified as reductions of accounts receivable (if the amount is

payable to the Company's customer) or a liability (if the amount is payable to a party other than the Company's customer, other than product returns, which are recorded as
liabilities). The Company's estimates of reserves established for variable consideration are calculated based upon a consistent application of the expected value method, which is the
sum of probability-weighted amounts in a range of possible consideration amounts. These estimates reflect the Company's historical experience, current contractual and statutory
requirements, specific known market events and trends, industry data, forecasted customer buying, and payment patterns. The amount of variable consideration that is included in the
transaction price may be subject to constraint and is included in net product revenues only to the extent that it is probable that a significant reversal in the amount of the cumulative
revenue recognized will not occur in a future period. Actual amounts of consideration received may ultimately differ from the Company's estimates. If actual results vary, the
Company adjusts these estimates, which could have an effect on earnings in the period of adjustment.

Chargebacks and administrative fees: Chargebacks for discounts represent the Company's estimated obligations resulting from contractual commitments to sell product to

qualified healthcare providers and government agencies at prices lower than the list prices charged to the customers who directly purchase the product from the Company. The
customers charge the Company for the difference between what the customers pay the Company for the product and the customer's ultimate contractually committed or government
required lower selling price to the qualified healthcare providers. As part of the Company's contractual commitments to sell product to qualified healthcare providers, the Company
pays fees for administrative services, such as account management and data reporting.

Government rebates: Government rebates consist of Medicare, Tricare, Medicaid, and other governmental rebates. These reserves are recorded in the same period the related

revenue is recognized. For Medicare, the Company also estimates the number of patients in the prescription drug coverage gap for whom it will owe a rebate under the Medicare Part
D program.

Trade discounts and allowances: The Company provides the customers with discounts that are explicitly stated in the contracts and recorded in the period the related product

revenue is recognized. In addition, the Company also receives sales order management, inventory management, and data services from the customers in exchange for certain fees.

Product returns: The Company estimates the amount of its product sales that may be returned by its customers and records this estimate in the period the related product
revenue is recognized. The Company currently estimates product return liabilities based on available industry data and its visibility into the inventory remaining in the distribution
channel.

Other incentives: Other incentives include co-payment assistance provided to qualified patients, whereby the Company may provide financial assistance to patients with

prescription drug co-payments required by the patient's insurance provider. Reserves for co-payment assistance are recorded in the same period the related revenue is recognized.

Collaboration Revenues

In June 2019, the Company entered into a License Agreement (the Zai License Agreement) with an affiliate of Zai Lab (Shanghai) Co., Ltd. (Zai), pursuant to which the
Company granted Zai exclusive rights to develop and commercialize QINLOCK, including certain follow-on compounds (the Licensed Products), in Greater China (the Territory). In
February 2020, the Company entered into a Supply Agreement (the Zai Supply Agreement), as required by terms in the Zai License Agreement, pursuant to which the Company
supplies the Licensed Products to Zai for use in the Territory for commercial inventory and

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clinical trials. Subject to the Zai Supply Agreement, costs incurred by the Company for external manufacturing services are reimbursed by Zai.

The Zai License Agreement includes development and regulatory milestone payments. Therefore, the Company evaluates whether the milestones are considered probable of
being reached and estimates the amount to be included in the transaction price using the most likely amount method. If it is probable that a significant cumulative revenue reversal
would not occur, the associated milestone value is included in the transaction price. Milestone payments that are not within the Company's control or the licensee's control, such as
regulatory approvals, are generally not considered probable of being achieved until those approvals are received.

The Zai License Agreement also includes sales-based royalties for the license of intellectual property, including milestone payments based on the level of sales. As the license

is deemed to be the predominant item to which the royalties relate, the Company recognizes royalty revenue and sales-based milestones at the later of (i) when the related sales occur,
or (ii) when the performance obligation to which the royalty has been allocated has been satisfied.

The Company recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) each performance obligation is

satisfied, either at a point in time or over time, and if over time, recognition is based on the use of an output or input method.

For additional information on the Zai License Agreement and Zai Supply Agreement, please read Note 3, Revenues, to these consolidated financial statements.

Cash Equivalents

The Company considers all highly liquid investments with original maturities of 90 days or less at the date of purchase to be cash equivalents.

Marketable Securities

Marketable securities consist of investments with original maturities greater than 90 days at the date of purchase. As of December 31, 2021 and 2020, the Company's

marketable securities were comprised of debt securities, commercial paper, U.S. government securities and the Company considers its marketable securities portfolio to be available-
for-sale.

Available-for-sale marketable securities are classified as current or non-current based on each instrument's underlying effective maturity date and for which the Company has

the intent and ability to hold the investment for a period of greater than 12 months. Marketable securities with maturities of less than 12 months from the balance sheet date are
classified as current and are included in short-term marketable securities in the consolidated balance sheets. Marketable securities with maturities greater than 12 months from the
balance sheet date for which we have the intent and ability to hold the investment for greater than 12 months are classified as non-current and are included in long-term marketable
securities in the consolidated balance sheets.

Available-for-sale marketable debt securities are recorded at fair market value and unrealized gains and losses are included in accumulated other comprehensive income (loss)

in equity, net of related tax effects, except for the changes in allowance for expected credit losses, which are recorded in other income (expense), net, within the consolidated
statements of operations and comprehensive loss. Realized gains and losses are reported in other income (expense), net, within the consolidated statements of operations and
comprehensive loss on a specific identification basis.

The Company conducts periodic reviews to identify and evaluate each investment in the Company's portfolio that has an unrealized loss to determine whether a credit loss

exists. An unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis.

A credit loss is estimated by considering available information relevant to the collectability of the security and information about past events, current conditions, and

reasonable and supportable forecasts. Any credit loss is recorded as a charge to other income (expense), net, not to exceed the amount of the unrealized loss. Unrealized losses other
than the credit loss are recognized in accumulated other comprehensive income (loss). When determining whether a credit loss exists, the Company considers several factors,
including whether the Company has the intent to sell the security or whether it is more likely than not that the Company will be required to sell the security prior to recovery of its
amortized cost basis. If the Company has an intent to sell, or if it is more likely than not that the Company will be required to sell a debt security in an unrealized loss position before
recovery of its amortized cost basis, the Company will write down the security to its fair value and record the corresponding charge as a

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component of other income (expense), net. No declines in value were deemed to be credit losses during the years ended December 31, 2021 or 2020 or other than temporary during
the year ended December 31, 2019.

Fair Value Measurements

Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability

(an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation
techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Financial assets and liabilities carried at fair value
are to be classified and disclosed in one of the following three levels of the fair value hierarchy, of which the first two are considered observable and the last is considered
unobservable:

•

•

•

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs (other than Level 1 quoted prices), such as quoted prices in active markets for similar assets or liabilities, quoted prices in markets that are not
active for identical or similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to determining the fair value of the assets or liabilities, including
pricing models, discounted cash flow methodologies, and similar techniques.

The Company's cash equivalents and marketable securities are carried at fair value, determined according to the fair value hierarchy described above. For additional

information on the Company's fair value hierarchy, please read Note 4, Marketable Securities and Fair Value Measurements, to these consolidated financial statements. The carrying
values of the Company's accounts payable and accrued expenses approximate their fair values due to the short-term nature of these liabilities.

Concentrations of Credit Risk and of Significant Suppliers

Financial instruments that potentially expose the Company to concentrations of credit risk consist primarily of cash, cash equivalents, and marketable securities. The Company
maintains all cash, cash equivalents, and marketable securities at accredited financial institutions, in amounts that exceed federally insured limits. The Company attempts to minimize
the risks related to cash, cash equivalents, and marketable securities by investing in a range of financial instruments as defined by the Company. The Company has established
guidelines related to credit ratings and maturities intended to safeguard principal balances and maintain liquidity. The marketable securities portfolio is maintained in accordance with
the Company's investment policy, which defines allowable investments, specifies credit quality standards and limits the credit exposure of any single issuer. The Company does not
believe that it is subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships.

The Company is dependent on third-party manufacturers to supply products for commercial and research and development activities associated with its drug and drug

candidates, as applicable. In particular, the Company relies and expects to continue to rely on a small number of manufacturers to supply it with its requirements for the active
pharmaceutical ingredients and formulated drugs related to the Company's drug and drug candidate activities. These activities, including the commercialization of QINLOCK, could
be adversely affected by a significant interruption in the supply of active pharmaceutical ingredients and formulated drugs.

Accounts Receivable

Accounts receivable arise from product sales and amounts due from the Company's collaboration partner and have standard payment terms that generally require payment

within 30 to 90 days. The amount from product sales represents amounts due from specialty distributors and specialty pharmacies, which are recorded net of reserves for customer
chargebacks, trade discounts and allowances, and other incentives to the extent such amounts are payable to the customer by the Company. The Company monitors economic
conditions to identify facts or circumstances that may indicate that its receivables are at risk of collection. The Company provides reserves against accounts receivable for estimated
losses, if any, that may result from a customer's inability to pay based on the composition of its accounts receivable, current economic conditions, and historical credit loss activity.
Amounts determined to be uncollectible are charged or written-off against the reserve. During the years ended December 31, 2021 and 2020, the Company did not record any
expected credit losses related to outstanding accounts receivable.

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Inventory

Inventories are stated at the lower of cost or estimated net realizable value with cost based on the first-in first-out method. Inventory that can be used in either the production of

clinical or commercial products is expensed as research and development costs when identified for use in clinical trials.

Prior to the regulatory approval of its drug candidates, the Company incurs expenses for the manufacture of drug product supplies to support clinical development that could

potentially be available to support the commercial launch of those drugs. Until the date at which regulatory approval has been received or is otherwise considered probable, the
Company records all such costs as research and development expenses.

The Company performs an assessment of the recoverability of capitalized inventories during each reporting period and writes down any excess and obsolete inventory to its net

realizable value in the period in which the impairment is first identified. Such impairment charges, should they occur, are recorded as a component of cost of sales in the Company's
consolidated statements of operations and comprehensive loss. The determination of whether inventory costs will be realizable requires the use of estimates by management. If actual
market conditions are less favorable than projected by management, additional write-downs of inventory may be required.

Long-Term Investment—Restricted

The Company's long-term investment—restricted balance is comprised of certificates of deposit. The certificates of deposit are held to secure letters of credit associated with
the Company's lease for space at its headquarters location and to secure a credit card. The balances of such accounts are classified as non-current and are measured at carrying value
in the consolidated balance sheets.

Property and Equipment

Property and equipment are stated at cost less accumulated depreciation. Depreciation expense is recognized using the straight-line method over the estimated useful life of

each asset as follows:

Asset Category
Lab equipment
Computer equipment
Furniture and fixtures

Leasehold improvements

Estimated Useful Life
5 to 7 years
3 to 5 years
7 years
Shorter of life of lease 

or 15 years

Upon retirement or sale, the cost of assets disposed of and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is included in the

consolidated statements of operations and comprehensive loss. The cost of normal, recurring, or periodic repairs and maintenance activities are expensed as incurred.

Leases

The Company accounts for a contract as a lease when it has the right to control the asset for a period of time while obtaining substantially all of the asset's economic benefits.
The Company determines if an arrangement is a lease or contains an embedded lease at inception. For arrangements that meet the definition of a lease, the Company determines the
initial classification and measurement of its operating right-of-use asset and operating lease liability at the lease commencement date and thereafter if modified. The lease term
includes any renewal options that the Company is reasonably assured to exercise. The present value of lease payments is determined by using the interest rate implicit in the lease, if
that rate is readily determinable; otherwise, the Company uses its estimated secured incremental borrowing rate for that lease term.

In addition to rent, the leases may require the Company to pay additional amounts for taxes, insurance, maintenance, and other expenses, which are generally referred to as

non-lease components. The Company has elected to not separate lease and non-lease components. Only the fixed costs for lease components and their associated non-lease
components are accounted for as a single lease component and recognized as part of a right-of-use asset and liability. Rent expense is recognized on a straight-line basis over the
reasonably assured lease term based on the total lease payments and is included in operating expenses in the consolidated statements of operations and comprehensive loss.

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The Company has made an accounting policy election to not recognize short-term leases, or leases that have a lease term of 12 months or less at commencement date, within

its consolidated balance sheets and to recognize those lease payments in the consolidated statements of operations and comprehensive loss on a straight-line basis over the lease term.

Impairment of Long-Lived Assets

Long-lived assets consist of property, equipment, and operating lease assets. Long-lived assets to be held and used are tested for recoverability whenever events or changes in
business circumstances indicate that the carrying amount of the assets or asset group may not be fully recoverable. Factors that the Company considers in deciding when to perform
an impairment review include significant underperformance of the business in relation to expectations, significant negative industry or economic trends, and significant changes or
planned changes in the use of the assets. If an impairment review is performed to evaluate a long-lived asset group for recoverability, the Company compares forecasts of
undiscounted cash flows expected to result from the use and eventual disposition of the long-lived asset group to its carrying value. An impairment loss would be recognized when
estimated undiscounted future cash flows expected to result from the use of an asset group are less than its carrying amount. The impairment loss would be based on the excess of the
carrying value of the impaired asset group over its fair value, determined based on discounted cash flows. The Company did not record any impairment losses on long-lived assets
during the years ended December 31, 2021, 2020, or 2019.

Acquired In-Process Research and Development (IPR&D)

Acquired IPR&D represents the value assigned to research and development assets that have not reached technological feasibility. Upon the acquisition of IPR&D, the

Company completes an assessment of whether the acquisition constitutes the purchase of a single asset or group of assets. The Company considers multiple factors in this
assessment, including the nature of the technology acquired, the presence or absence of separate cash flows, the development process and stage of completion, quantitative
significance, and the Company's rationale for entering into the transaction.

If the Company acquires a business as defined under applicable accounting standards, then the acquired IPR&D is capitalized as an intangible asset on the consolidated balance

sheets and recorded at fair value. If the Company acquires an asset or group of assets that do not meet the definition of a business under applicable accounting standards, then the
acquired IPR&D is expensed as research and development in the consolidated statements of operations and comprehensive loss on its acquisition date. Future costs to develop these
assets are recorded to research and development expense as they are incurred until such time that the asset or group of assets reaches technological feasibility, if ever.

Research and Development Costs

Research and development costs are expensed as incurred. Research and development expenses are comprised of costs incurred in performing research and development
activities, including salaries, stock-based compensation and benefits, facility- and technology-related costs, depreciation, manufacturing expenses, external costs of outside vendors
engaged to conduct preclinical development activities and trials, and upfront fees paid to third-parties associated with acquired IPR&D that has not reached technological feasibility.
Prior to initial regulatory approval, the Company expenses costs relating to the production of inventory for the Company's drug and drug candidates as research and development
expenses within the Company's consolidated statements of operations and comprehensive loss in the period incurred, unless the Company believes regulatory approval and
subsequent commercialization of the drug candidate is probable and the Company expects the future economic benefit from sales of the drug to be realized.

Advance payments for goods or services to be received in the future for use in research and development activities are recorded as prepaid expenses within the Company's

consolidated balance sheets. The prepaid amounts are expensed as the related goods are delivered or the services are performed.

Research Contract Costs and Accruals

The Company has entered into various research and development contracts with research institutions and other companies. These agreements are generally cancellable, and

related payments are recorded as research and development expenses as incurred. The Company records accruals for estimated ongoing research costs. When evaluating the
adequacy of the accrued liabilities, the Company analyzes progress of the studies or trials, including the phase or completion of events, invoices received, and contracted costs.
Significant judgments and estimates are made in determining the accrued balances at the end of any reporting period. Actual results could differ from the Company's estimates. The
Company's historical accrual estimates have not been materially different from the actual costs.

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Patent Costs

All patent-related costs incurred in connection with filing and prosecuting patent applications are expensed as incurred due to the uncertainty about the recovery of the

expenditure. Amounts incurred are classified as selling, general, and administrative expenses in the consolidated statements of operations and comprehensive loss.

Stock-Based Compensation

The Company measures all stock options and other stock-based awards granted to employees and directors based on the fair value on the date of the grant and recognizes

compensation expense of those awards over the requisite service period, which is generally the vesting period of the respective award. The straight-line method of expense
recognition is applied to all awards with service-only conditions while the graded-vesting method is applied to all awards with both service and performance conditions. The
Company has granted performance-based awards under which the fair market value of the awards is expensed after assessing the probability that certain performance criteria will be
met and the associated targeted payout level that is forecasted will be achieved. The Company accounts for forfeitures as they occur.

The Company classifies stock-based compensation expense in its consolidated statements of operations and comprehensive loss in the same manner in which the award

recipient's payroll costs are classified or in which the award recipient's service payments are classified.

Income Taxes

The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax
consequences of events that have been recognized in the consolidated financial statements or in the Company's tax returns. Deferred taxes are determined based on the difference
between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. Changes in
deferred tax assets and liabilities are recorded in the provision for income taxes. The Company assesses the likelihood that its deferred tax assets will be recovered from future
taxable income and, to the extent it believes, based upon the weight of available evidence, that it is more likely than not that all or a portion of deferred tax assets will not be realized,
a valuation allowance is established through a charge to income tax expense. Potential for recovery of deferred tax assets is evaluated by estimating the future taxable profits
expected and considering prudent and feasible tax planning strategies.

The Company accounts for uncertainty in income taxes recognized in its consolidated financial statements by applying a two-step process to determine the amount of tax

benefit to be recognized. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination by the taxing authorities. If the tax
position is deemed more-likely-than- not to be sustained, the tax position is then assessed to determine the amount of benefit to recognize in the consolidated financial statements.
The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The provision for income
taxes includes the effects of any resulting tax reserves, or unrecognized tax benefits, that are considered appropriate as well as the related net interest and penalties.

Comprehensive Loss and Accumulated Other Comprehensive Income (Loss)

Comprehensive loss includes net loss as well as other changes in stockholders' equity (deficit) that result from transactions and economic events other than those with
shareholders. For the year ended December 31, 2021, the Company's other comprehensive income (loss) consisted of foreign currency translation adjustments and unrealized gains
(losses) on marketable securities. For the years ended December 31, 2020 and 2019, the Company's other comprehensive income (loss) consisted of unrealized gains (losses) on
marketable securities.

As of December 31, 2021, accumulated other comprehensive income (loss) primarily consisted of foreign currency translation adjustments and unrealized gains (losses) on

marketable securities. As of December 31, 2020, accumulated other comprehensive income (loss) consisted of unrealized gains (losses) on marketable securities.

Net Loss per Share

Basic net income (loss) per share is computed by dividing the net income (loss) by the weighted average number of common shares outstanding for the years ended

December 31, 2021, 2020, and 2019. Diluted net income (loss) per share is computed by dividing the diluted net income (loss) by the weighted average number of common shares,
including potential dilutive common shares assuming the dilutive effect of outstanding stock options and unvested restricted common stock, as determined using the treasury stock
method. For periods in which the Company has reported net losses, diluted net loss per

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common share is the same as basic net loss per common share, since dilutive common shares are not assumed to have been issued if their effect is antidilutive.

3. Revenues

Net Product Revenues

To date, the Company's only source of product revenues has been from the sales of QINLOCK, which began in May 2020, following the approval of QINLOCK by the FDA

on May 15, 2020 for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase inhibitors, including imatinib, and during 2020
and 2021 in certain other jurisdictions following regulatory approval or on a named patient basis.

Net product revenues by geography consisted of the following:

(in thousands)
U.S.
Rest of world

Total product revenues, net

2021

Year Ended December 31,
2020

2019

$

$

81,476  $
5,913 
87,389  $

37,989  $
1,472 
39,461  $

— 
— 
— 

The Company primarily sells QINLOCK through specialty distributors and specialty pharmacies. The Company recognized revenues from three customers accounting for

57%, 18%, and 10% of gross product revenues for the year ended December 31, 2021, and 57%, 24%, and 10% of gross product revenues for the year ended December 31, 2020,
respectively. As of December 31, 2021, two customers individually accounted for approximately 46% and 30% of accounts receivable associated with the Company's product sales,
as compared to 59% and 20% as of December 31, 2020, respectively.

Activity in each of the product revenue allowance and reserve categories is summarized as follows:

(in thousands)
Balance as of December 31, 2020

Provision related to sales in the

current year

Adjustments related to prior period

sales

Credits and payments made during

the period

Balance as of December 31, 2021

Trade discounts and
allowances

Chargebacks and

administrative fees

Government rebates

and other incentives

Returns

Total

$

$

152 

$

264 

$

2,522 

85 

(2,492)
267 

$

4,367 

57 

(4,194)
494 

$

2,433 

8,279 

(418)

(2,431)
7,863 

$

$

532 

$

2,013 

(395)

(1,333)
817 

$

3,381 

17,181 

(671)

(10,450)
9,441 

The total reserves described above are summarized as components of the Company's consolidated balance sheets as follows:
(in thousands)
Reduction of accounts receivable, net
Component of accrued expenses and other current liabilities

Total revenue-related reserves

December 31, 2021

December 31, 2020

$

$

719 
8,722 
9,441 

$

$

363 
3,018 
3,381 

Collaboration Revenues

Zai License Agreement

In June 2019, the Company entered into the Zai License Agreement, pursuant to which the Company granted Zai exclusive rights to develop and commercialize the Licensed

Products in the Territory. The Company retains exclusive rights to, among other things, develop, manufacture, and commercialize the Licensed Products outside the Territory.

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Pursuant to the terms of the Zai License Agreement, the Company received an upfront cash payment of $20.0 million and three development milestone payments totaling

$12.0 million and will be eligible to receive up to $173.0 million in potential development and commercial milestone payments, consisting of up to $38.0 million of development
milestones and up to $135.0 million of commercial milestones. In addition, during the term of the Zai License Agreement, Zai will be obligated to pay the Company tiered
percentage royalties ranging from low to high teens on annual net sales of the Licensed Products in the Territory, subject to adjustments in specified circumstances. Additionally,
certain costs incurred by the Company associated with the Zai License Agreement are reimbursed by Zai.

During the year ended December 31, 2021, revenues recognized under the Zai License Agreement included the achievement of a $5.0 million development milestone in the

first quarter of 2021 associated with the approval of QINLOCK for the treatment of adult patients with advanced GIST who have received prior treatment with three or more kinase
inhibitors, including imatinib, by the China NMPA in March 2021. Additionally, during the second quarter of 2021, following the approvals of QINLOCK in the PRC and Hong
Kong in March 2021, the Company began recognizing royalty revenues under the Zai License Agreement.

During the year ended December 31, 2020, revenues recognized under the Zai License Agreement included the achievement of a $2.0 million development milestone in the

second quarter of 2020.

During the year ended December 31, 2019, revenues recognized under the Zai License Agreement included the $20.0 million upfront payment and a $5.0 million INTRIGUE

study-related development milestone payment, which the Company believed to be probable of achievement in the second quarter of 2019 and was achieved in July 2019.

Subject to the terms and conditions of the Zai License Agreement, Zai will be responsible for conducting the development and commercialization activities in the Territory

related to the Licensed Products.

Subject to specified exceptions, during the term of the Zai License Agreement, each party has agreed that neither it nor its affiliates nor, with respect to Zai, its sublicensees,
will conduct any development, manufacturing, and commercialization activities in the Territory that may be deemed competitive with the Licensed Products. In addition, under the
Zai License Agreement, each party has granted the other party specified intellectual property licenses to enable the other party to perform its obligations and exercise its rights under
the Zai License Agreement, including license grants to enable each party to conduct research, development and commercialization activities pursuant to the terms of the Zai License
Agreement.

The Zai License Agreement will continue on a Licensed Product-by-Licensed Product and region-by-region basis until the later of (i) the abandonment, expiry or final
determination of invalidity of the last valid claim within the Company's patent rights that covers the Licensed Product in such region in the Territory; (ii) the expiry of the regulatory
exclusivity for such Licensed Product in such region; or (iii) the close of business of the day that is exactly ten (10) years after the date of the first commercial sale of such Licensed
Product in such region. Subject to the terms of the Zai License Agreement, Zai may terminate the Zai License Agreement for convenience by providing written notice to the
Company, which termination will be effective following a prescribed notice period. In addition, the Company may terminate the Zai License Agreement under specified
circumstances if Zai or certain other parties challenge our patent rights or if Zai or its affiliates do not conduct certain development activities with respect to one or more Licensed
Products for a specified period of time, subject to specified exceptions. Either party may terminate the Zai License Agreement for the other party's uncured material breach of a
material term of the Zai License Agreement, with a customary notice and cure period, or insolvency. After termination (but not natural expiration), the Company is entitled to retain a
worldwide and perpetual license from Zai to exploit the Licensed Products. On a region-by-region and a Licensed Product-by-Licensed Product basis, upon the natural expiration of
the Zai License Agreement as described above, the licenses granted by the Company to Zai under the Zai License Agreement in such region with respect to the Licensed Product
become fully paid-up, perpetual and irrevocable.

The Company identified the following promises under the Zai License Agreement: (1) the exclusive license, with the right to grant sublicenses, granted in the Territory for the

Licensed Products; (2) initial and continuing know-how transfer for the Licensed Products; (3) clinical supply of the Licensed Products; (4) participation in the joint steering
committee (JSC); and (5) regulatory and technical assistance responsibilities.

The Company determined that the exclusive license is distinct and constitutes one performance obligation that is a right to use the Company's intellectual property. The

Company determined that the promises under the Zai License Agreement related to the know-how transfer, clinical and commercial supply, participation in the JSC, and the
assistance responsibilities are immaterial in the context of the Zai License Agreement and therefore are excluded from the assessment of performance obligations. The Company also
evaluated certain options and contingent obligations contained within the Zai License Agreement to determine if they provide Zai with any material rights. The Company concluded
that the options and contingent obligations were not issued at

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a significant and incremental discount, and therefore do not provide Zai with a material right. As such, these options and contingent obligations were excluded as performance
obligations and will be accounted for if and when they occur or are exercised.

The Company determined that the upfront payment of $20.0 million and the $5.0 million INTRIGUE study-related development milestone were probable of achievement and
that a significant reversal of cumulative revenue would not occur upon resolution of the uncertainty, and constitutes the consideration to be included in the transaction price as of the
commencement of the arrangement. The transaction price, totaling $25.0 million, was allocated to the one performance obligation, which was satisfied at a point in time upon
delivery of the license in June 2019, and therefore the Company recognized license revenue in the full amount of the transaction price during the second quarter of 2019.
Additionally, in the second quarter of 2020 and first quarter of 2021, the Company determined that the $2.0 million and $5.0 million development milestones, respectively, were
probable of achievement and that a significant reversal of cumulative revenue would not occur upon resolution of the uncertainty, and constitute consideration to be included in the
transaction price of the arrangement. The remaining potential milestone payments that the Company is eligible to receive were excluded from the transaction price and were fully
constrained based on the probability of achievement. The Company will reevaluate the transaction price at the end of each reporting period and as uncertain events are resolved or
other changes in circumstances occur, and if necessary, the Company will adjust its estimate of the transaction price. Because the performance obligation has been satisfied, any
additions to the transaction price would be fully recognized in the period.

The Company assessed the Zai License Agreement to determine whether a significant financing component exists and concluded that a significant financing component does

not exist.

Zai Supply Agreement

In February 2020, the Company entered into the Zai Supply Agreement, as required by terms in the Zai License Agreement, pursuant to which the Company will supply the

Licensed Products to Zai for use in the Territory for clinical trials as well as commercial inventory, if QINLOCK obtained regulatory approval in the Territory. In March 2021,
QINLOCK was approved in the PRC and in Hong Kong. In September 2021, QINLOCK was approved in Taiwan. Subject to the Zai Supply Agreement, costs incurred by the
Company for clinical and commercial supply are reimbursed by Zai.

During the second quarter of 2021, following the approvals of QINLOCK in the PRC and Hong Kong in March 2021, the Company began recognizing revenues associated

with sales of commercial inventory of QINLOCK under the Zai Supply Agreement.

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4. Marketable Securities and Fair Value Measurements

The following tables present marketable securities by contractual maturity and security type:

As of December 31, 2021 (in thousands)
Due within one year:
Commercial paper
Corporate debt securities
Certificates of deposit
U.S. government securities

Due after one year through five years:

Corporate debt securities
U.S. government securities

Total

As of December 31, 2020 (in thousands)
Due within one year:

U.S. government securities
Commercial paper
Corporate debt securities
Certificates of deposit

Due after one year through five years:

U.S. government securities

Total

Amortized Cost

Gross Unrealized

Gains

Gross Unrealized

Losses

Estimated Fair Value

$

$

105,433 
61,721 
23,528 
8,008 

37,003 
5,094 
240,787 

$

$

1 
— 
1 
— 

— 
— 
2 

$

$

(44)
(70)
(7)
— 

(129)
(18)
(268)

$

$

105,390 
61,651 
23,522 
8,008 

36,874 
5,076 
240,521 

Amortized Cost

Gross Unrealized Gains

Gross Unrealized Losses

Estimated Fair Value

$

$

298,335  $
62,037 
38,309 
17,344 

9,370 
425,395  $

49  $
9 
— 
1 

5 
64  $

(1) $

(15)
(34)
(1)

— 
(51) $

298,383 
62,031 
38,275 
17,344 

9,375 
425,408 

The following tables present information about the Company's financial assets measured at fair value on a recurring basis and indicate the level of the fair value hierarchy

utilized to determine such fair values:

As of December 31, 2021 (in thousands)
Cash equivalents:

Money market funds
U.S. government securities

Marketable securities:

U.S. government securities
Commercial paper
Corporate debt securities
Certificates of deposit

Total

As of December 31, 2020 (in thousands)
Cash equivalents:

Money market funds
Certificates of deposit

Marketable securities:

U.S. government securities
Commercial paper
Corporate debt securities
Certificates of deposit

Total

Level 1

Level 2

Level 3

Total

$

$

$

$

— 
— 

— 
— 
— 
— 
— 

Level 1

47,800 
— 

13,084 
105,390 
98,525 
23,522 
288,321 

Level 2

$

$

— 
— 

— 
— 
— 
— 
— 

$

$

Level 3

Total

—  $
— 

— 
— 
— 
— 
—  $

46,676  $
30,000 

307,758 
62,031 
38,275 
17,344 
502,084  $

—  $
— 

— 
— 
— 
— 
—  $

$

$

139

47,800 
— 

13,084 
105,390 
98,525 
23,522 
288,321 

46,676 
30,000 

307,758 
62,031 
38,275 
17,344 
502,084 

Table of Contents

The tables above exclude certificates of deposit of $3.1 million as of both December 31, 2021 and 2020 that the Company held to secure a letter of credit associated with its

leases and to secure a credit card account. The certificates of deposit are measured at carrying value in the consolidated balance sheets in long-term investments—restricted and
approximate fair value. For additional information on the letter of credit associated with the Company's leases, please read Note 7, Leases, to these consolidated financial statements.

The fair value of Level 2 instruments classified as cash equivalents and marketable securities were determined through third-party pricing services. The pricing services use

many observable market inputs to determine value, including reportable trades, benchmark yields, credit spreads, broker/dealer quotes, bids, offers, current spot rates, and other
industry and economic events. The Company performs validation procedures to ensure the reasonableness of this data. The Company performs its own review of prices received
from the independent pricing services by comparing these prices to other sources. After completing the validation procedures, the Company did not adjust or override any fair value
measurements provided by the pricing services as of December 31, 2021 and 2020.

5. Inventory

The Company commenced the capitalization of QINLOCK inventory in May 2020 upon receiving FDA approval of QINLOCK.

Capitalized inventory consisted of the following:
(in thousands)
Raw materials
Work in process
Finished goods

Total inventory

December 31, 2021

December 31, 2020

$

$

4,721 
7,925 
1,479 
14,125 

$

$

1,352 
4,142 
222 
5,716 

Inventory written down as a result of excess, obsolescence, unmarketability, or other reasons is charged to cost of sales, and totaled less than $0.1 million during the year ended

December 31, 2021. There were no inventory amounts written down and charged to cost of sales during the year ended December 31, 2020.

6. Property and Equipment, Net

Property and equipment, net consisted of the following:

(in thousands)
Laboratory equipment
Computer equipment
Furniture and fixtures
Leasehold improvements
Construction in progress

Total cost

Less: Accumulated depreciation

Total property and equipment, net

December 31,

2021

2020

$

$

5,297 
4,843 
3,424 
2,055 
127 
15,746 
(7,136)
8,610 

$

$

3,631 
4,795 
3,187 
1,895 
197 
13,705 
(4,122)
9,583 

Depreciation expense was $3.0 million, $2.3 million, and $0.8 million for the years ended December 31, 2021, 2020, and 2019, respectively.

7. Leases

The Company leases real estate, including office and laboratory space.

In May 2018, the Company entered into a lease for office space (the Initial Space) at 200 Smith Street in Waltham, Massachusetts (the Premises). The initial term of the lease

expires in November 2029, unless terminated earlier in accordance with the terms of the lease. The Company is entitled to two five-year options to extend. The initial annual base
rent is

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Table of Contents

approximately $2.0 million and will increase annually for a total of $22.4 million over the lease term. In October 2019, the lease for the Initial Space commenced and resulted in the
addition of an operating lease asset of $21.2 million and corresponding lease liability of $17.0 million in the fourth quarter of 2019. The Premises became the Company's new
headquarters in October 2019.

In April 2019, the Company amended its lease for office space at the Premises to add an additional 38,003 square feet of space (the Additional Space) for a total of 82,346

square feet of space. The initial term of the lease for the Additional Space will expire in November 2029 unless terminated earlier in accordance with the terms of the lease and the
Company is entitled to two five-year options to extend the lease. The initial annual base rent for the Additional Space is approximately $1.9 million and will increase annually for a
total of $18.2 million over the lease term. In July 2020, the lease for the Additional Space commenced and resulted in the addition of an operating lease asset of $16.5 million and a
corresponding lease liability of $13.5 million in the third quarter of 2020.

The Company is required to maintain a letter of credit associated with its leases at the Premises. The balances of the Company's certificate of deposit associated with the letter
of credit for its leases at the Premises of $2.1 million as of both December 31, 2021 and 2020 were classified as long-term investment—restricted in the consolidated balance sheets.
The Company increased the letter of credit and associated certificate of deposit by $1.0 million pursuant to the terms of the lease agreement for the Additional Space during the
fourth quarter of 2020.

In August 2020, the Company amended and restated its real estate leases primarily for office and laboratory space in Lawrence, Kansas (the 2020 Lawrence Lease

Agreements). The initial term of the 2020 Lawrence Lease Agreements will expire on December 31, 2030 unless terminated earlier in accordance with the terms of the lease and the
Company is entitled to two five-year options to extend the leases. The 2020 Lawrence Lease Agreements modified a previously existing operating lease which resulted in an
additional operating lease asset of $1.4 million and a corresponding lease liability of $1.4 million during the third quarter of 2020. Further, new leases associated with the 2020
Lawrence Lease Agreements commenced under ASC 842 during the first and fourth quarters of 2021 resulting in the additions of operating lease assets of $0.5 million and $3.4
million and corresponding lease liabilities of $0.5 million and $1.7 million, respectively. The Company expects that an additional new operating lease associated with additional lease
space included in the 2020 Lawrence Lease Agreements will commence in 2022.

The Company's leases contain options to extend the lease terms; however, these extensions were not included in the operating lease assets and lease liabilities recorded on the

consolidated balance sheets as they were not reasonably certain of being exercised.

During the years ended December 31, 2021, 2020, and 2019 the Company was subject to certain lease agreements with terms of less than 12 months to accommodate short-

term or temporary needs and its office space needs to support commercialization efforts in key European markets. The expenses associated with such lease agreements are included
in short-term lease costs for the years ended December 31, 2021, 2020, and 2019, as applicable.

The Company's leases require the Company to pay for its share of certain operating expenses, taxes, and other expenses based on actual costs incurred and therefore, as the

amounts are variable in nature, are expensed in the period incurred and included in variable lease costs for the years ended December 31, 2021, 2020, and 2019. Payment escalations
specified in the leases are recognized on a straight-line basis over the lease terms.

All of the Company's leases qualify as operating leases. The following table summarizes the presentation of the Company's operating leases in the consolidated balance sheet:

(in thousands)

Operating lease assets

Current operating lease liabilities
Operating lease liabilities, net of current portion

Total operating lease liabilities

141

December 31,

2021

2020

36,800  $

36,341 

2,870  $

27,991 
30,861  $

2,457 
28,764 
31,221 

$

$

$

Table of Contents

The components of lease expense were as follows:

(in thousands)
Operating lease cost
Short-term lease cost
Variable lease cost

Total lease expense

Future annual minimum lease payments under operating leases are as follows:

(in thousands)
2022
2023
2024
2025
2026
Thereafter

Total future minimum lease payments

Less: imputed interest

Total operating lease liabilities

2021

Year Ended December 31,
2020

2019

$

$

5,178  $
357 
1,225 
6,760  $

4,167  $
354 
461 
4,982  $

1,223 
520 
427 
2,170 

As of December 31, 2021
4,518 
$
4,601 
4,683 
4,765 
4,848 
15,136 
38,551 
(7,690)
30,861 

$

As of December 31,

2021

2020

8.02

5.57 %

8.97

5.60 %

The weighted-average remaining lease term and weighted-average discount rate of the Company's operating leases are as follows:

Weighted-average remaining lease term in years

Weighted-average discount rate

Supplemental disclosure of cash flow information related to the Company's operating leases included in cash flows used in operating activities in the consolidated statement of

cash flows were as follows:

(in thousands)
Cash paid for amounts included in the measurement of operating lease liabilities
Operating lease liabilities arising from obtaining operating lease assets

8. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:

(in thousands)
External research and development expenses
Restructuring reserve
Payroll and related expenses
Revenue-related reserves
Professional fees
Other

Total accrued expenses and other current liabilities

2021

Year Ended December 31,
2020

$
$

4,243  $
2,150  $

2,666  $
14,902  $

2019

532 
17,144 

December 31,

2021

2020

$

$

32,619 
20,790 
11,945 
8,722 
5,626 
1,071 
80,773 

$

$

31,259 
— 
17,255 
3,018 
3,306 
389 
55,227 

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Table of Contents

9. Shareholders' Equity

Undesignated Preferred Stock

The Company's board of directors has the authority, without further action by its stockholders, to issue up to 5,000,000 shares of preferred stock in one or more series and to fix

the rights, preferences, privileges and restrictions thereof. These rights, preferences and privileges could include dividend rights, conversion rights, voting rights, terms of
redemption, liquidation preferences, sinking fund terms and the number of shares constituting, or the designation of, such series, any or all of which may be greater than the rights of
common stock. The issuance of preferred stock could adversely affect the voting power of holders of common stock and the likelihood that such holders will receive dividend
payments and payments upon the Company's liquidation. In addition, the issuance of preferred stock could have the effect of delaying, deferring or preventing a change in control of
the Company or other corporate action. There are no shares of preferred stock outstanding as of the date of this Annual Report on Form 10-K.

Common Stock

On August 19, 2019, the Company issued and sold 10,810,810 shares of its common stock in a follow-on public offering at a public offering price of $37.00 per share,
resulting in net proceeds of $375.4 million after deducting underwriting discounts and commissions and other offering expenses. On September 3, 2019, the Company issued and
sold an additional 1,621,621 shares of its common stock at the offering price of $37.00 per share, pursuant to the underwriters' full exercise of their option to purchase additional
shares of common stock, resulting in additional net proceeds of $56.4 million after deducting underwriting discounts and commissions.

On February 19, 2020, the Company issued and sold 3,181,818 shares of its common stock in a follow-on public offering at a public offering price of $55.00 per share,
resulting in net proceeds of $163.7 million after deducting underwriting discounts and commissions and other offering expenses. On February 25, 2020, the Company issued and sold
an additional 477,272 shares of its common stock at the offering price of $55.00 per share, pursuant to the underwriters' full exercise of their option to purchase additional shares of
common stock, resulting in additional net proceeds of $24.7 million after deducting underwriting discounts and commissions.

In August 2020, the Company entered into the Sales Agreement with Jefferies, pursuant to which the Company may issue and sell shares of its common stock in "at-the-
market" offerings having aggregate offering proceeds of up to $200.0 million from time to time through Jefferies as its sales agent. During the years ended December 31, 2021 and
2020, the Company issued 172,094 shares resulting in net proceeds of $8.5 million and 294,275 shares resulting in net proceeds of $17.9 million, respectively, under the Sales
Agreement. As of December 31, 2021, there was up to $172.5 million available for future issuance under the Sales Agreement. For additional information on the Sales Agreement,
please read Note 1, Nature of the Business and Basis of Presentation, to these consolidated financial statements.

10. Stock-Based Awards

2017 Equity Incentive Plan

The Company's 2017 Stock Option and Incentive Plan (the 2017 Plan) provides for the grant of equity-based incentive awards. The number of shares initially reserved for
issuance of awards under the 2017 Plan was 2,655,831 shares of common stock and may be increased by the number of shares under the 2015 Equity Incentive Plan (the 2015 Plan)
and the 2017 Plan that are forfeited, cancelled, repurchased by the Company, or otherwise surrendered. The 2017 Plan provides that the number of shares reserved and available for
issuance under the plan will automatically increase each January 1, beginning on January 1, 2018, by 4% of the outstanding number of shares of our common stock on the
immediately preceding December 31, or such lesser number of shares as determined by the Compensation Committee of the Company's Board of Directors. As of December 31,
2021, 615,131 remained available for issuance under the 2017 Plan. The number of shares reserved for issuance under the 2017 Plan was increased by 2,341,985 shares effective
January 1, 2022.

Inducement Plan

In January 2022, the Company adopted the Inducement Plan pursuant to which the Company reserved 800,000 shares of common stock to be used exclusively for grants of
equity-based awards to individuals who were not previously employees or directors of the Company, as an inducement material to the individual’s entry into employment with the
Company within the meaning of Rule 5635(c)(4) of the Marketplace Rules of the Nasdaq Stock Market, Inc. The Inducement Plan provides for the grant of equity-based awards in
the form of nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, unrestricted stock awards, and dividend equivalent rights. The
Inducement Plan was adopted by the

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Company without stockholder approval pursuant to Rule 5635(c)(4) of the Marketplace Rules of the Nasdaq Stock Market, Inc. To date, there have been no grants made pursuant to
the Inducement Plan.

2015 Equity Incentive Plan

Under the 2015 Plan the Company was authorized to sell or issue common shares or restricted common shares, or to grant options for the purchase of common shares, share
appreciation rights, and other awards, to employees, members of the board of directors, consultants, and advisors of the Company. Upon effectiveness of the 2017 Plan no further
awards were available to be issued under the 2015 Plan.

Both the 2017 and 2015 Plans provide that they be administered by the board of directors or, at the discretion of the board of directors, by a committee of the board of

directors. The exercise prices for stock options may not be less than 100% of the fair market value of the common stock on the date of grant and the term of awards may not be
greater than ten years. The Company bases fair value of common stock on the quoted market price. Vesting periods are determined at the discretion of the board of directors. Awards
granted to employees and directors typically vest over four years.

2017 Employee Stock Purchase Plan

The 2017 Employee Stock Purchase Plan (the ESPP) initially reserved and authorized the issuance of up to 306,750 shares of common stock to participating employees. The
ESPP provides that the number of shares reserved and available for issuance will automatically increase each January 1, beginning on January 1, 2018 and each January 1 thereafter
through January 1, 2027, by the least of (i) 1% of the outstanding number of shares of common stock on the immediately preceding December 31; (ii) 400,000; shares or (iii) such
number of shares as determined by the ESPP administrator. As of December 31, 2021, 1,681,188 remained available for issuance under the ESPP Plan. The number of shares
reserved for issuance under the ESPP was increased by 400,000 shares effective January 1, 2022.

The purchase price of common stock under the ESPP is equal to 85% of the lesser of (i) the fair market value per share of the common stock on the first business day of an
offering period and (ii) the fair market value per share of the common stock on the purchase date. The fair value of the discounted purchases made under the ESPP is calculated using
the Black-Scholes option-pricing model, which is described in further detail within the "Stock Option Valuation" section below, on the date of the first day of the offering period. The
fair value of the look-back provision plus the 15% discount is recognized as stock-based compensation expense in the consolidated statements of operations and comprehensive loss
over the 6-month purchase period. Employees began participating in the ESPP program during the first offering period of the ESPP program in the second quarter of 2020. There
were 90,947 and 37,298 shares of common stock issued under the ESPP during the years ended December 31, 2021 and 2020, respectively.

Stock Option Valuation

The fair value of each stock option award is estimated on the date of grant using the Black-Scholes option-pricing model, which uses as inputs the fair value of the Company's
common stock and assumptions for the volatility of its common stock, the expected term of stock-based awards, the risk-free interest rate for a period that approximates the expected
term of stock-based awards, and the expected dividend yield. Prior to October 2017, the Company was privately-held and lacked company-specific historical and implied volatility
information. Therefore, it estimates its expected share volatility based on the historical volatility of a set of publicly traded peer companies as well as the limited historical volatility
of its own traded stock price. The Company estimated the expected term of its options using the "simplified" method for awards that qualify as "plain-vanilla" options. The risk-free
interest rate is determined by reference to the U.S. Treasury yield curve in effect at the time of grant of the award for time periods approximately equal to the expected term of the
award. Expected dividend yield is based on the fact that the Company has never paid cash dividends on common shares and does not expect to pay any cash dividends in the
foreseeable future.

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Table of Contents

The assumptions that the Company used to determine the fair value of options granted to employees and directors were as follows, presented on a weighted average basis:

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

2021
1.0 

77.8 
0 

%
5.8
%
%

Year Ended December 31,
2020
1.2 

%
6.1
%
%

77.2 
0 

2019
2.2 

74.5 
0 

%
6.2
%
%

The following table summarizes the Company's option activity from January 1, 2021 to December 31, 2021:

Number

of Shares

Weighted Average

Exercise Price

Weighted

Average Remaining
Contractual Term
(in years)

Aggregate Intrinsic

Value
(in thousands)

Outstanding as of December 31, 2020

Granted
Exercised
Forfeited/Expired

Outstanding as of December 31, 2021

Options vested and expected to vest as of December 31, 2021

Options exercisable as of December 31, 2021

5,712,339 
2,877,170 
(577,605)
(572,396)
7,439,508 

7,439,508 

3,599,498 

$
$
$
$

$

$

$

29.53 
26.80 
8.17 
40.49 

29.28 

29.28 

29.06 

7.86

7.86

6.65

$

$

$

3,891 

3,891 

3,103 

The aggregate intrinsic value of options is calculated as the difference between the exercise price of the options and the fair value of the Company's common shares for those
options that had exercise prices lower than the fair value of the Company's common shares. The aggregate intrinsic value of options exercised during the years ended December 31,
2021, 2020, and 2019 was $15.7 million, $86.0 million, and $53.2 million, respectively.

The weighted average grant-date fair value per share of options granted during the years ended December 31, 2021, 2020, and 2019 was $17.95, $36.71, and $19.22,

respectively.

Restricted Stock Units

The 2017 Plan provides for the award of restricted stock units. During the years ended December 31, 2021, 2020, and 2019, the Company granted restricted stock units to

employees that were subject to time-based vesting conditions that lapse between one year and four years from date of grant, assuming continued employment.

From time to time, the Company may grant restricted stock units that are subject to performance-based vesting conditions. The Company granted no performance-based

restricted units in 2021 or 2020. As of December 31, 2021 and 2020, there were no unvested performance-based restricted units.

All restricted stock units currently granted have been classified as equity instruments as their terms require settlement in shares. Restricted stock units with time-based and

performance-based vesting conditions are valued on the grant date using the grant date market price of the underlying shares.

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Table of Contents

The table below summarizes the Company's time-based restricted stock unit activity from January 1, 2021 to December 31, 2021:

Unvested at December 31, 2020

Granted
Vested
Forfeited

Unvested at December 31, 2021

Number

of Shares

438,625 
1,341,899 
(112,854)
(129,938)
1,537,732 

$
$
$
$

$

Weighted

Average
Grant Date
Fair Value

49.28 
31.12 
48.48 
46.95 

33.68 

The fair value of time-based restricted stock units that vested during the years ended December 31, 2021, 2020, and 2019 were $4.7 million, $2.3 million, and $0.5 million

respectively.

Stock-Based Compensation Expense

Stock-based compensation expense was classified in the statements of operations and comprehensive loss as follows:

(in thousands)
Research and development
Selling, general, and administrative
Total stock-based compensation

2021

20,698 
25,380 
46,078 

$

$

Year Ended December 31,
2020

$

$

17,443 
19,694 
37,137 

The following table summarizes share-based compensation expense associated with each of our share-based compensation arrangements:

(in thousands)
Stock options
Time-based restricted stock units
Performance-based restricted stock units
Employee stock purchase plan

Total stock-based compensation expense

2021

Year Ended December 31,
2020

36,263 
9,047 
— 
768 
46,078 

$

$

29,925 
4,424 
1,907 
881 
37,137 

$

$

2019

7,934 
12,476 
20,410 

2019

19,328 
1,082 
— 
— 
20,410 

$

$

$

$

As of December 31, 2021, total unrecognized compensation cost related to the unvested share-based awards was $101.1 million, which is expected to be recognized over a

weighted average of 2.1 years.

During the year ended December 31, 2020, the Company recorded $1.9 million of stock-based compensation expense related to a vesting event associated with performance-
based restricted stock units that became probable and was achieved during the second quarter of 2020. These expenses were classified as research and development expenses within
the consolidated statements of operations and comprehensive loss.

During the year ended December 31, 2019, the Company recorded $2.4 million of stock-based compensation expense related to the modification of stock options pursuant to

the transition agreement with its former President and Chief Executive Officer, which was classified within selling, general, and administrative expenses in the statements of
operations and comprehensive loss.

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Table of Contents

11. In-License Agreement

In August 2021, the Company entered into an agreement with Sprint Bioscience (Sprint) to exclusively in-license worldwide rights to a research-stage program targeting

VPS34, a key kinase in the autophagy pathway for the potential treatment of cancer (the Sprint Agreement).

The Company accounted for this transaction as an asset acquisition as the value being acquired primarily relates to a single IPR&D asset. Pursuant to the terms of the Sprint

Agreement, the Company made an upfront payment of $4.0 million during the third quarter of 2021, which was recorded as research and development expense within the
consolidated statements of operations and comprehensive loss during the year ended December 31, 2021 as the acquired asset had not yet reached technological feasibility. Sprint is
also eligible to receive up to an additional $273.0 million in potential development and commercial milestone payments from the Company as well as tiered percentage royalties
ranging from the mid-single-digits to the low-double-digits on the sales of a potential product from the program, if approved.

12. 401(k) Savings Plan

Effective January 1, 2018, the Company adopted the 2018 401(k) Plan, a defined contribution plan under Section 401(k) of the Internal Revenue Code, whereby the Company

provides matching contributions of 100% of each employee's contribution up to a maximum matching contribution of 3% of the employee's eligible compensation and at a rate of
50% of each employee's contribution in excess of 3% up to a maximum of 5% of the employee's eligible compensation.

Total employer matching contributions related to the 2018 401(k) Plan were $2.8 million, $2.3 million, and $0.9 million for the years ended December 31, 2021, 2020, and

2019, respectively.

13. Restructuring

In November 2021, the Company announced a corporate restructuring intended to prioritize clinical development of select programs, streamline commercial operations,
maintain a focus on discovery research, and extend its cash runway. The corporate restructuring included a workforce reduction of approximately 35%, or approximately 140
positions, as well as discontinuation costs such as contract termination fees and non-cancellable commitments related to the rebastinib and ripretinib programs. These amounts will
be substantially incurred and paid by the end of 2022.

The Company recognized a one-time charge in the fourth quarter of 2021 of approximately $26.2 million. This charge included approximately $9.8 million of employee-
related termination costs and approximately $16.4 million of discontinuation costs such as contract termination fees and non-cancellable commitments related to the rebastinib and
ripretinib programs. For the year ended December 31, 2021, approximately $22.2 million and $4.0 million is recognized in research and development expenses and selling, general,
and administrative expenses, respectively, on the Company's consolidated statements of operations and comprehensive loss. The restructuring reserve was included in accrued
expenses and other in the Company’s consolidated balance sheets.

The following table summarizes the charges and spending related to the Company’s restructuring efforts during 2021:

(in thousands)
Restructuring charges incurred during the fourth quarter of 2021
Amounts previously included in prepaid and other current assets

Reserves established

Amounts paid through December 31, 2021

Restructuring reserve as of December 31, 2021

14. Net Loss per Share

Workforce Reduction

Pipeline Programs

Total

$

$

9,835  $
— 
9,835 
(2,452)
7,383  $

16,335  $
(2,927)
13,408 
— 
13,408  $

26,170 
(2,927)
23,243 
(2,452)
20,791 

Basic net income (loss) per share is computed by dividing the net income (loss) by the weighted average number of common shares outstanding for the period. Diluted net

income (loss) per share is computed by dividing the diluted net income (loss) by the weighted average number of common shares, including potential dilutive common shares
assuming the dilutive effect as determined using the treasury stock method.

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For periods in which the Company has reported net losses, diluted net loss per common share is the same as basic net loss per common share, since dilutive common shares are

not assumed to have been issued if their effect is anti-dilutive. The Company reported a net loss during each of the periods presented.

Basic and diluted net loss per share was calculated as follows:

(in thousands, except share and per share amounts)
Numerator:
Net loss

Denominator:

Weighted average common shares outstanding—basic and diluted

Net loss per share—basic and diluted

Common Stock Equivalents

2021

(299,964)

58,084,325 

(5.16)

$

$

Year Ended December 31,
2020

$

$

(266,489)

55,780,982 

(4.78)

2019

(192,256)

42,869,058 

(4.48)

$

$

The following potential dilutive securities, presented based on amounts outstanding at the end of each reporting period, have been excluded from the calculation of diluted net

loss per share because including them would have had an anti-dilutive impact:

Options to purchase common stock
Unvested restricted stock units
Unvested employee stock purchase plan shares

Total

15. Income Taxes

2021
7,439,508 
1,537,732 
211,822 
9,189,062 

As of December 31,
2020
5,712,339 
438,625 
30,826 
6,181,790 

2019
6,750,939 
156,900 
— 
6,907,839 

On October 2, 2017, immediately prior to the completion of its initial public offering (IPO), the Company engaged in a series of transactions whereby Deciphera
Pharmaceuticals, LLC became a wholly owned subsidiary of Deciphera Pharmaceuticals, Inc., a Delaware corporation. As part of the transactions, shareholders of Deciphera
Pharmaceuticals, LLC exchanged their shares of Deciphera Pharmaceuticals, LLC for shares of Deciphera Pharmaceuticals, Inc. on a one-for-5.65 basis (the Conversion).

Prior to the Conversion on October 2, 2017, the Company had been treated as a partnership for tax purposes and had not been subject to U.S. federal or state income taxation.

As a result, the Company had not recorded any U.S. federal or state income tax benefits for the net losses incurred prior to October 2, 2017 or for earned research and orphan drug
credits as the operating losses incurred by the Company had been passed through to its members. Upon consummation of the Conversion on October 2, 2017, the Company became
subject to Corporate U.S. federal and state income taxes.

During the years ended December 31, 2021, 2020, and 2019, the Company reported net losses, and as a result, recorded no income tax benefits for the net operating losses

(NOLs), due to its uncertainty of realizing a benefit from those items.

Net loss by jurisdiction is as follows:

(in thousands)
U.S.
Foreign

Net loss

2021

Year Ended December 31,
2020

$

$

(281,129) $
(18,835)
(299,964) $

(266,483) $

(6)

(266,489) $

2019

(192,256)
— 
(192,256)

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Table of Contents

A reconciliation of the U.S. federal statutory income tax rate to the Company's effective income tax rate is as follows:

Federal statutory income tax rate

State taxes, including credits, net of federal benefit
Federal research and orphan drug credit
Stock-based compensation
Permanent adjustments and other
Increase in deferred tax asset valuation allowance

Effective income tax rate

2021
21.0 
3.2 
2.5 
0.1 
(0.3)
(26.5)
— 

%

%

%

Year Ended December 31,
2020
21.0 
2.4 
2.1 
5.4 
0.5 
(31.4)
— 

%

2019
21.0 
7.0 
5.4 
4.7 
(0.9)
(37.2)
— 

%

%

During 2020, the Company completed a detailed study of its research and development and orphan drug credits. As a result, the Company adjusted its deferred tax asset

balances and the impacts are included in the research and orphan drug credit line in the effective rate reconciliation above. The impacts of the decreases in the deferred tax asset
balances have been completely offset by a decrease in the Company's valuation allowance which is included in the increase in deferred tax asset valuation allowance line in the
reconciliation above.

Net deferred tax assets consisted of the following:

(in thousands)
Deferred tax assets (liabilities):

Net operating loss carryforwards
Research and orphan drug credit carryforwards
Stock-based compensation
Accrued expenses
Operating lease liabilities
Property and equipment
Operating lease assets
Other

Total gross deferred tax assets

Valuation allowance

Net deferred tax assets

The change in the valuation allowance was as follows:

(in thousands)
Valuation allowance as of beginning of year

Net increases recorded to income tax provision

Valuation allowance as of end of year

December 31,

2021

2020

216,377  $
40,077 
15,701 
9,560 
9,019 
(322)
(8,904)
1,028 
282,536 
(282,536)

—  $

159,192 
31,142 
8,928 
3,779 
9,321 
(387)
(8,811)
16 
203,180 
(203,180)
— 

Year Ended December 31,

2021

2020

(203,180) $
(79,356)
(282,536) $

(119,647)
(83,533)
(203,180)

$

$

$

$

As of December 31, 2021, the Company had NOL carryforwards for federal income tax purposes of $870.9 million, of which $16.6 million begin to expire in 2037 and $854.3

million may be carried forward indefinitely but are subject to an 80% limitation. As of December 31, 2021, the Company had NOL carryforwards for state income tax purposes of
$688.8 million, which begin to expire in 2035. As of December 31, 2021, the Company also had available research and orphan drug credit carryforwards for federal and state income
tax purposes of $36.6 million and $4.5 million, respectively, which begin to expire in 2037 and 2032, respectively. We also had foreign NOL carryforwards of $19.3 million as of
December 31, 2021, which will begin to expire in 2026. Utilization of the NOL carryforwards and research and orphan drug credit carryforwards may be subject to a substantial
annual limitation under Section 382 of the Internal Revenue Code of 1986, as amended (the Code), and similar state law due to ownership changes that could occur in the future.

These ownership changes may limit the amount of carryforwards that can be utilized annually to offset future taxable income. If the Company experiences a change of control,
as defined by Section 382 of the Code and similar state law, at any time since the IPO, utilization of the NOL carryforwards or research and orphan drug credit carryforwards may be
subject to an annual

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limitation under Section 382 of the Code, which is determined by first multiplying the value of the Company's stock at the time of the ownership change by the applicable long-term
tax-exempt rate, and then could be subject to additional adjustments, as required. Any limitation may result in expiration of a portion of the NOL carryforwards or research and
orphan drug credit carryforwards before utilization. The Company performed an analysis of ownership changes through December 31, 2020. Based on this analysis, the Company
does not believe that any of its tax attributes through December 31, 2020 will expire unutilized due to Section 382 limitations. The Company has not conducted a formal study to
assess whether a change of control has occurred or whether there have been multiple changes of control since December 31, 2020 due to the recency of the previous study and
significant complexity and cost associated with such a study.

The Company has evaluated the positive and negative evidence bearing upon its ability to realize the deferred tax assets. Management has considered the Company's history of
cumulative net losses incurred since inception and has concluded that it is more likely than not that the Company will not realize the benefits of the deferred tax assets. Accordingly,
a full valuation allowance has been established against the deferred tax assets as of December 31, 2021. Management reevaluates the positive and negative evidence at each reporting
period.

The Company has not recorded any amounts for unrecognized tax benefits as of December 31, 2021. The Company will recognize interest and penalties related to uncertain tax

positions in income tax expense when, if ever, it is in a taxable income position. As of December 31, 2021 and 2020, the Company had no accrued interest or penalties related to
uncertain tax positions and no amounts have been recognized in the Company's statement of operations and comprehensive loss.

The Company files tax returns as prescribed by the tax laws of the jurisdictions in which it operates. In the normal course of business, the Company is subject to examination
by federal, state, and foreign jurisdictions, where applicable. There are currently no pending income tax examinations. The Company's tax years that are open under statute are from
December 31, 2018 to the present, although carryforward attributes that were generated prior to 2018 may still be adjusted upon examination by the IRS or state tax authorities if
they either have been or will be used in a future period. The Company's policy is to record interest and penalties related to income taxes as part of its income tax provision.

As of December 31, 2021, the unremitted earnings of our foreign subsidiaries are not material. We have not provided for U.S. income taxes or foreign withholding taxes on

these earnings as it is our current intention to permanently reinvest these earnings outside the U.S. The tax liability on these earnings is also not material. Events that could trigger a
tax liability include, but are not limited to, distributions, reorganizations or restructurings and/or tax law changes.

16. Commitments and Contingencies

Purchase Commitments Associated with Commercial Supply Agreements

The Company has entered into commercial supply agreements related to the supply of QINLOCK that require the Company to make binding forecasts for a certain amount of

purchases. The related cancellation clauses would as a general matter require the Company to pay the full amount of these binding forecasts. As of December 31, 2021, the
Company's contractual commitments for its commercial supply agreements were $15.5 million, of which $14.5 million is expected to be paid within one year and $1.0 million is
expected to be paid between one and three years. During the years ended December 31, 2021 and 2020, the Company made $9.1 million and $3.7 million, respectively, of payments
for purchases associated with its commercial supply agreements.

Legal Proceedings

The Company is not currently a party to any material legal proceedings. At each reporting date, the Company evaluates whether or not a potential loss amount or a potential
range of loss is probable and reasonably estimable under the provisions of the authoritative guidance that addresses accounting for contingencies. The Company expenses the costs
related to its legal proceedings as they are incurred.

Indemnification Agreements

In the ordinary course of business, the Company may provide indemnification of varying scope and terms to vendors, lessors, business partners, and other parties with respect

to certain matters including, but not limited to, losses arising out of breach of such agreements or from intellectual property infringement claims made by third parties. In addition,
the Company has entered into indemnification agreements with members of its board of directors and senior management that will require the Company, among other things, to
indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. The maximum potential amount of future payments the Company
could be required to make under these indemnification agreements is, in many cases, unlimited. To date, the Company has not incurred any material costs as a result of

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such indemnifications. The Company is not aware of any claims under indemnification arrangements, and it has not accrued any liabilities related to such obligations in its
consolidated financial statements as of December 31, 2021 or 2020.

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 Chief Executive Officer and Chief Financial Officer (our principal executive officer and principal financial officer,

respectively), evaluated the effectiveness of our disclosure controls and procedures as of December 31, 2021. The term "disclosure controls and procedures," as defined in Rules 13a-
15(e) and 15d-15(e) under the Exchange Act means controls and other procedures of a company that are designed to provide reasonable assurance that information required to be
disclosed by a 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 SEC's
rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to provide reasonable assurance 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.

Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and
management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and
procedures as of December 31, 2021, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures were effective
at the reasonable assurance level.

Internal Control Over Financial Reporting

Management's Report on Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rule 13a-15(f) under the Securities

Exchange Act of 1934, as amended. Our internal control over financial reporting is a process designed under the supervision of our principal executive officer and principal financial
officer to provide reasonable assurance regarding the reliability of financial reporting and the preparation of our financial statements for external purposes in accordance with GAAP.
Our management conducted an assessment of the effectiveness of our internal control over financial reporting based on the criteria set forth in "Internal Control-Integrated
Framework (2013)" issued by the Committee of Sponsoring Organization of the Treadway Commission. Based on this assessment, management concluded that, as of December 31,
2021, our internal control over financial reporting was effective.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to
future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may
deteriorate.

The effectiveness of our internal control over financial reporting as of December 31, 2021 has been audited by PricewaterhouseCoopers LLP, an independent registered public

accounting firm, as stated in their audit report, which is included herein.

Changes in Internal Control Over Financial Reporting

No change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) occurred during the three months ended

December 31, 2021 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 9C. DISCLOSURE REGARDING FOREIGN JURISDICTION THAT PREVENTS INSPECTIONS

Not applicable.

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Table of Contents

PART III

ITEM 10.    DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by this Item 10 will be included in our definitive proxy statement to be filed with the SEC with respect to our 2022 Annual Meeting of Stockholders

and is incorporated herein by reference.

ITEM 11.    EXECUTIVE COMPENSATION

The information required by this Item 11 will be included in our definitive proxy statement to be filed with the SEC with respect to our 2022 Annual Meeting of Stockholders

and is incorporated herein by reference.

ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required by this Item 12 will be included in our definitive proxy statement to be filed with the SEC with respect to our 2022 Annual Meeting of Stockholders

and 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 our definitive proxy statement to be filed with the SEC with respect to our 2022 Annual Meeting of Stockholders

and is incorporated herein by reference.

ITEM 14.    PRINCIPAL ACCOUNTING FEES AND SERVICES

The information required by this Item 14 will be included in our definitive proxy statement to be filed with the SEC with respect to our 2022 Annual Meeting of Stockholders

and is incorporated herein by reference.

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PART IV

ITEM 15.    EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a)

(1) Financial Statements

The following financial statements are filed as part of this report:

•

•

•

•

•

Report of the Independent Registered Public Accounting Firm

Consolidated Balance Sheets

Consolidated Statements of Operations and Comprehensive Loss

Consolidated Statements of Stockholders' Equity

Consolidated Statements of Cash Flows

• Notes to Consolidated Financial Statements

(2) Financial Statement Schedules

Financial statement schedules have been omitted because they are either not required or not applicable or the information is included in the consolidated financial statements
or the notes thereto.

(3) Exhibits

See the Exhibit Index in Item 15(b) below.

(b)    Exhibit Index.
Exhibit

Number

Description

2.1*

3.1*

3.2*

4.1*

4.2*

4.3*

4.4*

10.1#*

10.2#*

10.3#*

10.4#*

Reorganization Agreement and Plan of Merger by and among the Registrant, Deciphera Pharmaceuticals, LLC and the other parties named therein, dated
October 2, 2017 (Incorporated by reference to Exhibit 2.1 to the Registrant’s Quarterly Report on Form 10-Q filed on November 14, 2017)(1)

Amended and Restated Certificate of Incorporation of the Registrant (Incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K

filed on October 5, 2017).

Amended and Restated Bylaws of the Registrant (Incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K filed on June 12,

2020)

Specimen Common Stock Certificate (Incorporated by reference to Exhibit 4.1 to Amendment No. 3 to the Registrant’s Registration Statement on Form S-1 filed

on September 22, 2017).

Second Amended and Restated Investors’ Rights Agreement among Deciphera Pharmaceuticals, LLC and certain of its shareholders, dated May 26, 2017
(Incorporated by reference to Exhibit 4.2 to Amendment No. 1 to the Registrant’s Registration Statement on Form S-1 filed on September 11, 2017).

Registration Rights Agreement by and among the Registrant and certain of its stockholders, dated October 2, 2017 (Incorporated by reference to Exhibit 4.1 to

the Registrant’s Quarterly Report on Form 10-Q filed on November 14, 2017).

Description of Securities (Incorporated by reference to Exhibit 4.4 to the Registrant's Annual Report on Form 10-K filed on March 9, 2020).

2015 Equity Incentive Plan, as amended, and form of award agreements thereunder (Incorporated by reference to Exhibit 10.1 to Amendment No. 2 to the

Registrant’s Registration Statement on Form S-1 filed on September 18, 2017).

2017 Stock Option and Incentive Plan (Incorporated by reference to Exhibit 10.2 to Amendment No. 3 to the Registrant’s Registration Statement on Form S-

1 filed on September 22, 2017).

Form of Incentive Stock Option Agreement under 2017 Stock Option and Incentive Plan (Incorporated by reference to Exhibit 10.3 to the Registrant’s Annual

Report on Form 10-K filed on February 9, 2021).

Form of Non-Qualified Stock Option Agreement for Company Employees under 2017 Stock Option and Incentive Plan (Incorporated by reference to Exhibit

10.4 to the Registrant’s Annual Report on Form 10-K filed on February 9, 2021).

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Table of Contents

hibit

Number

Description

5#*

6#*

7#*

8#*

9#

10#

11#

12#*

13#*

14#*

15#*

16#*

17#*

18#*

18(a)#*

19#*

19(a)#*

20#*

21#*

22#*

Form of Restricted Stock Unit Award Agreement for Company Employees under 2017 Stock Option and Incentive Plan (Incorporated by reference to Exhibit

10.5 to the Registrant’s Annual Report on Form 10-K filed on February 9, 2021).

Form of Non-Qualified Stock Option Agreement for Non-U.S. Optionees under 2017 Stock Option and Incentive Plan (Incorporated by reference to Exhibit 10.6

to the Registrant’s Annual Report on Form 10-K filed on February 9, 2021).

Form of Restricted Stock Unit Award Agreement for Non-U.S. Grantees under 2017 Stock Option and Incentive Plan (Incorporated by reference to Exhibit 10.7

to the Registrant’s Annual Report on Form 10-K filed on February 9, 2021).

Form of Non-Qualified Stock Option Agreement for Non-Employee Directors under 2017 Stock Option and Incentive Plan (Incorporated by reference to Exhibit

10.8 to the Registrant’s Annual Report on Form 10-K filed on February 9, 2021).

2022 Inducement Plan

Form of Non-Qualified Stock Option Agreement for Company Employees under 2022 Inducement Plan

Form of Restricted Stock Unit Award Agreement for Company Employees under 2022 Inducement Plan

2017 Employee Stock Purchase Plan (Incorporated by reference to Exhibit 10.3 to Amendment No. 3 to the Registrant’s Registration Statement on Form S-

1 filed on September 22, 2017).

Form of Indemnification Agreement between Deciphera Pharmaceuticals, Inc. and each of its directors (Incorporated by reference to Exhibit 10.4 to Amendment

No. 3 to the Registrant’s Registration Statement on Form S-1 filed on September 22, 2017).

Form of Indemnification Agreement between Deciphera Pharmaceuticals, Inc. and each of its executive officers (Incorporated by reference to Exhibit 10.5 to

Amendment No. 3 to the Registrant’s Registration Statement on Form S-1 filed on September 22, 2017).

Transition Agreement, dated as of March 4, 2019, by and between Deciphera Pharmaceuticals, Inc., Deciphera Pharmaceuticals, LLC and Michael D. Taylor

(Incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on March 4, 2019).

Employment Agreement, dated as of March 4, 2019, by and between Deciphera Pharmaceuticals, LLC and Steven Hoerter (Incorporated by reference to Exhibit

10.2 to the Registrant’s Current Report on Form 8-K filed on March 4, 2019).

Employee Confidentiality, Assignment and Noncompetition Agreement, dated as of March 4, 2019, by and between Deciphera Pharmaceuticals, LLC and

Steven Hoerter (Incorporated by reference to Exhibit 10.3 to the Registrant’s Current Report on Form 8-K filed on March 4, 2019).

Employment Agreement, between Deciphera Pharmaceuticals, LLC and Thomas P. Kelly (Incorporated by reference to Exhibit 10.7 to the Registrant’s Current

Report on Form 10-K filed on March 14, 2019).

Amendment No. 1 to Employment Agreement, between Deciphera Pharmaceuticals, LLC and Thomas P. Kelly (Incorporated by reference to Exhibit 10.16(a) to

the Registrant’s Annual Report on Form 10-K filed on February 9, 2021).

Employment Agreement, between Deciphera Pharmaceuticals, LLC and Daniel L. Flynn (Incorporated by reference to Exhibit 10.17 to the Registrant’s Annual

Report on Form 10-K filed on February 9, 2021).

Amendment No. 1 to Employment Agreement, between Deciphera Pharmaceuticals, LLC and Daniel L. Flynn (Incorporated by reference to Exhibit 10.17(a) to

the Registrant’s Annual Report on Form 10-K filed on February 9, 2021)

Employment Agreement, between Deciphera Pharmaceuticals, LLC and Matthew L. Sherman (Incorporated by reference to Exhibit 10.11 to the Registrant’s

Current Report on Form 10-K filed on March 9, 2020).

Employment Agreement, between Deciphera Pharmaceuticals, LLC and Daniel C. Martin (Incorporated by reference to Exhibit 10.8 to the Registrant’s Current

Report on Form 10-K filed on March 14, 2019).

Deciphera Pharmaceuticals, Inc. Amended and Restated Non-Employee Director Compensation Policy (Incorporated by reference to Exhibit 10.1 to the

Registrant’s Quarterly Report on Form 10-Q filed on May 5, 2020).

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Table of Contents

hibit

Number

23#*

24*

24(a)*

24(b)*

24(c)*

25*

26*

27*

28*

29*

1

1

1

1

2

1†

2†

.INS

.SCH

.CAL

.LAB

.PRE

.DEF

Description

Deciphera Pharmaceuticals, Inc. Senior Executive Cash Incentive Bonus Plan (Incorporated by reference to Exhibit 10.11 to Amendment No. 3 to the

Registrant’s Registration Statement on Form S-1 filed on September 22, 2017).

Lease Agreement, dated May 29, 2018, by and between Deciphera Pharmaceuticals, Inc. and 200 Smith NWALP Property Owner LLC (Incorporated by

reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on May 31, 2018).

Amendment No. 1 dated October 26, 2018 to the Lease Agreement, dated May 29, 2018, by and between Deciphera Pharmaceuticals, Inc. and 200 Smith

NWALP Property Owner LLC (Incorporated by reference to Exhibit 10.11(a) to the Registrant's Annual Report on Form 10-K filed on March 19, 2019).

Amendment No. 2 dated December 17, 2018 to the Lease Agreement, dated May 29, 2018, by and between Deciphera Pharmaceuticals, Inc. and 200 Smith

NWALP Property Owner LLC (Incorporated by reference to Exhibit 10.11(a) to the Registrant's Annual Report on Form 10-K filed on March 19, 2019).

Third Amendment to Lease, dated April 29, 2019, by and between Deciphera Pharmaceuticals, Inc. and 200 Smith NWALP Property Owner LLC (Incorporated

by reference to Exhibit 10.1to the Registrant’s Current Report on Form 8-K filed on May 3, 2019).

License Agreement, made as of June 10, 2019, by and between Deciphera Pharmaceuticals, LLC and Zai Lab (Shanghai) Co., Ltd. (2) (Incorporated by

reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q filed on August 2, 2019).

Letter Agreement, made as of January 17, 2020, by and between Deciphera Pharmaceuticals, LLC and Zai Lab (Shanghai) Co., Ltd. (2) (Incorporated by

reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q filed on May 5, 2020).

Commercial Manufacturing Services and Supply Agreement, made as of April 3, 2019, by and between Deciphera Pharmaceuticals, LLC and Lonza (2)

(Incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q filed on August 4, 2020).

Supply Agreement, made as of February 28, 2020, by and between Deciphera Pharmaceuticals, LLC and Cambrex (2) (Incorporated by reference to Exhibit 10.2

to the Registrant's Quarterly Report on Form 10-Q filed on August 4, 2020).

Open Market Sale Agreement

, dated August 4, 2020, by and between Deciphera Pharmaceuticals, Inc. and Jefferies LLC. (Incorporated by reference to

SM

Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on August 4, 2020).

List of Subsidiaries of Registrant.

Consent of PricewaterhouseCoopers LLP, an independent registered public accounting firm.

Power of Attorney (included on signature page to this Annual Report on Form 10-K).

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.

Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

XBRL Instance Document.

XBRL Taxonomy Extension Schema Document.

XBRL Taxonomy Extension Calculation Linkbase Document.

XBRL Taxonomy Extension Labels Linkbase Document.

XBRL Taxonomy Extension Presentation Linkbase Document.

XBRL Taxonomy Extension Definition Linkbase Document.

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Table of Contents

hibit

Number

Description

Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101).

_____________
*    Previously filed.
#    Indicates management contract or compensation plan.
(1)

Schedules and exhibits have been omitted from this filing pursuant to Item 601(b)(2) of Regulation S-K. The registrant agrees to furnish supplementally a copy of any
omitted schedule or exhibit to the Securities and Exchange Commission upon its request; provided, however, that the registrant may request confidential treatment pursuant
to Rule 24b-2 of the Securities Exchange Act of 1934, as amended, for any schedule or exhibit so furnished.
Portions of this exhibit (indicated by asterisk) have been omitted in accordance with the rules of the Securities and Exchange Commission.

(2)
†    The certifications attached as Exhibits 32.1 and 32.2 that accompany this Annual Report on Form 10-K, are not deemed filed with the Securities and Exchange Commission and
are not to be incorporated by reference into any filing of Deciphera Pharmaceuticals, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of
1934, as amended, whether made before or after the date of this Annual Report on Form 10-K, irrespective of any general incorporation language contained in such filing.

ITEM 16.    FORM 10-K SUMMARY

None.

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Table of Contents

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the

SIGNATURES

undersigned, thereunto duly authorized.

Date: February 8, 2022

DECIPHERA PHARMACEUTICALS, INC.

By:

/s/ Steven L. Hoerter
Steven L. Hoerter
President and Chief Executive Officer

POWER OF ATTORNEY

Each person whose individual signature appears below hereby authorizes and appoints Steven L. Hoerter and Thomas P. Kelly, and each of them, with full power of

substitution and resubstitution and full power to act without the other, as his or her true and lawful attorney-in-fact and agent to act in his or her name, place and stead and to execute
in the name and on behalf of each person, individually and in each capacity stated below, and to file any and all amendments to this annual report on Form 10-K and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of
them, full power and authority to do and perform each and every act and thing, ratifying and confirming all that said attorneys-in-fact and agents or any of them or their or his
substitute or substitutes may lawfully do or cause to be done by virtue thereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the

capacities and on the dates indicated.

Signature

/s/ Steven L. Hoerter

Steven L. Hoerter

/s/ Thomas P. Kelly

Thomas P. Kelly

/s/ Patricia L. Allen

Patricia L. Allen

/s/ Edward J. Benz, Jr., M.D.

Edward J. Benz, Jr., M.D.

/s/ James A. Bristol, Ph.D.

James A. Bristol, Ph.D.

/s/ Frank S. Friedman

Frank S. Friedman

/s/ Susan L. Kelley, M.D.

Susan L. Kelley, M.D.

/s/ John R. Martin

John R. Martin

/s/ Ron Squarer

Ron Squarer

/s/ Dennis L. Walsh

Dennis L. Walsh

President, Chief Executive Officer and

Director (Principal Executive Officer)

Title

Chief Financial Officer (Principal

Financial and Accounting Officer)

Director

Director

Director

Director

Director

Director

Director

Director

158

Date
February 8, 2022

February 8, 2022

February 8, 2022

February 8, 2022

February 8, 2022

February 8, 2022

February 8, 2022

February 8, 2022

February 8, 2022

February 8, 2022

 
 
Exhibit 10.9

DECIPHERA PHARMACEUTICALS, INC.

2022 INDUCEMENT PLAN

SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS

The name of the plan is the Deciphera Pharmaceuticals, Inc. 2022 Inducement Plan (the “Plan”). The purpose of the Plan is to enable. (the “Company”) to grant equity awards

to induce highly qualified prospective employees to accept employment and provide them with a proprietary interest in the Company. It is anticipated that providing such persons
with a direct stake in the Company’s welfare will assure a closer identification of their interests with those of the Company and its stockholders, thereby stimulating their efforts on
the Company’s behalf and strengthening their desire to remain with the Company. The Company intends that the Plan be reserved for persons to whom the Company may issue
securities without stockholder approval as an inducement pursuant to Rule 5635(c)(4) of the Marketplace Rules of the NASDAQ Stock Market, Inc.

The following terms shall be defined as set forth below:

“Act” means the Securities Act of 1933, as amended, and the rules and regulations thereunder.

“Administrator” means either the Board or the compensation committee of the Board or a similar committee performing the functions of the compensation committee and

which is comprised of not less than two Non-Employee Directors who are independent.

“Award” or “Awards,” except where referring to a particular category of grant under the Plan, shall include Non-Qualified Stock Options, Stock Appreciation Rights,

Restricted Stock Units, Restricted Stock Awards, Unrestricted Stock Awards and Dividend Equivalent Rights.

“Award Certificate” means a written or electronic document setting forth the terms and provisions applicable to an Award granted under the Plan. Each Award Certificate is

subject to the terms and conditions of the Plan.

“Board” means the Board of Directors of the Company.

“Code” means the Internal Revenue Code of 1986, as amended, and any successor Code, and related rules, regulations and interpretations.

“Dividend Equivalent Right” means an Award entitling the grantee to receive credits based on cash dividends that would have been paid on the shares of Stock specified in the

Dividend Equivalent Right (or other award to which it relates) if such shares had been issued to and held by the grantee.

“Effective Date” means the date on which the Plan is approved by the Board as set forth in Section 18.

“Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder.

“Fair Market Value” of the Stock on any given date means the fair market value of the Stock determined in good faith by the Administrator; provided, however, that if the
Stock is admitted to quotation on the National Association of Securities Dealers Automated Quotation System (“NASDAQ”), NASDAQ Global Market or another national securities
exchange, the determination shall be made by reference to market quotations. If there are no market quotations for such date, the determination shall be made by reference to the last
date preceding such date for which there are market quotations.

“Non-Employee Director” means a member of the Board who is not also an employee of the Company or any Subsidiary.

Exhibit 10.9

“Non-Qualified Stock Option” means any Stock Option that is not an “incentive stock option” under Section 422 of the Code.

“Option” or “Stock Option” means any option to purchase shares of Stock granted pursuant to Section 5.

“Restricted Shares” means the shares of Stock underlying a Restricted Stock Award that remain subject to a risk of forfeiture or the Company’s right of repurchase.

“Restricted Stock Award” means an Award of Restricted Shares subject to such restrictions and conditions as the Administrator may determine at the time of grant.

“Restricted Stock Units” means an Award of stock units subject to such restrictions and conditions as the Administrator may determine at the time of grant. 

“Sale Event” shall mean (i) the sale of all or substantially all of the assets of the Company on a consolidated basis to an unrelated person or entity, (ii) a merger, reorganization
or consolidation pursuant to which the holders of the Company’s outstanding voting power and outstanding stock immediately prior to such transaction do not own a majority of the
outstanding voting power and outstanding stock or other equity interests of the resulting or successor entity (or its ultimate parent, if applicable) immediately upon completion of
such transaction, (iii) the sale of all of the Stock of the Company to an unrelated person, entity or group thereof acting in concert, or (iv) any other transaction in which the owners of
the Company’s outstanding voting power immediately prior to such transaction do not own at least a majority of the outstanding voting power of the Company or any successor
entity immediately upon completion of the transaction other than as a result of the acquisition of securities directly from the Company.

“Sale Price” means the value as determined by the Administrator of the consideration payable, or otherwise to be received by stockholders, per share of Stock pursuant to a

Sale Event.

“Section 409A” means Section 409A of the Code and the regulations and other guidance promulgated thereunder.

“Stock” means the Common Stock, par value $0.01 per share, of the Company, subject to adjustments pursuant to Section 3.

“Stock Appreciation Right” means an Award entitling the recipient to receive shares of Stock having a value equal to the excess of the Fair Market Value of the Stock on the
date of exercise over the exercise price of the Stock Appreciation Right multiplied by the number of shares of Stock with respect to which the Stock Appreciation Right shall have
been exercised.

“Subsidiary” means any corporation or other entity (other than the Company) in which the Company has at least a fifty percent (50%) interest, either directly or indirectly.

“Unrestricted Stock Award” means an Award of shares of Stock free of any restrictions.

SECTION 2. ADMINISTRATION OF PLAN; ADMINISTRATOR AUTHORITY TO SELECT GRANTEES AND DETERMINE                       AWARDS

(a) Administration of Plan. The Plan shall be administered by the Administrator.

(b) Powers of Administrator. The Administrator shall have the power and authority to grant Awards consistent with the terms of the Plan, including the power and authority:

(i) to select the individuals to whom Awards may from time to time be granted;

Exhibit 10.9

(ii) to determine the time or times of grant, and the extent, if any, of Non-Qualified Stock Options, Stock Appreciation Rights, Restricted Stock Awards, Restricted Stock

Units, Unrestricted Stock Awards, and Dividend Equivalent Rights, or any combination of the foregoing, granted to any one or more grantees;

(iii) to determine the number of shares of Stock to be covered by any Award;

(iv) to determine and modify from time to time the terms and conditions, including restrictions, not inconsistent with the terms of the Plan, of any Award, which terms

and conditions may differ among individual Awards and grantees, and to approve the forms of Award Certificates;

(v) to accelerate at any time the exercisability or vesting of all or any portion of any Award;

(vi) subject to the provisions of Section 5(c), to extend at any time the period in which Stock Options may be exercised; and

(vii) at any time to adopt, alter and repeal such rules, guidelines and practices for administration of the Plan and for its own acts and proceedings as it shall deem

advisable; to interpret the terms and provisions of the Plan and any Award (including related written instruments); to make all determinations it deems advisable for the
administration of the Plan; to decide all disputes arising in connection with the Plan; and to otherwise supervise the administration of the Plan.

All decisions and interpretations of the Administrator shall be binding on all persons, including the Company and Plan grantees.

(c) Award Certificate. Awards under the Plan shall be evidenced by Award Certificates that set forth the terms, conditions and limitations for each Award which may include,

without limitation, the term of an Award and the provisions applicable in the event employment or service terminates.

(d) Indemnification. Neither the Board nor the Administrator, nor any member of either or any delegate thereof, shall be liable for any act, omission, interpretation,

construction or determination made in good faith in connection with the Plan, and the members of the Board and the Administrator (and any delegate thereof) shall be entitled in all
cases to indemnification and reimbursement by the Company in respect of any claim, loss, damage or expense (including, without limitation, reasonable attorneys’ fees) arising or
resulting therefrom to the fullest extent permitted by law and/or under the Company’s certificate of incorporation or bylaws or any directors’ and officers’ liability insurance
coverage which may be in effect from time to time and/or any indemnification agreement between such individual and the Company.

(e) Foreign Award Recipients. Notwithstanding any provision of the Plan to the contrary, in order to comply with the laws in other countries in which the Company and its

Subsidiaries operate or have employees or other individuals eligible for Awards, the Administrator, in its sole discretion, shall have the power and authority to: (i) determine which
Subsidiaries shall be covered by the Plan; (ii) determine which individuals outside the United States are eligible to participate in the Plan; (iii) modify the terms and conditions of any
Award granted to individuals outside the United States to comply with applicable foreign laws; (iv) establish subplans and modify exercise procedures and other terms and
procedures, to the extent the Administrator determines such actions to be necessary or advisable (and such subplans and/or modifications shall be attached to this Plan as
appendices); provided, however, that no such subplans and/or modifications shall increase the share limitations contained in Section 3(a) hereof; and (v) take any action, before or
after an Award is made, that the Administrator determines to be necessary or advisable to obtain approval or comply with any local governmental regulatory exemptions or
approvals. Notwithstanding the foregoing, the Administrator may not take any actions hereunder, and no Awards shall be granted, that would violate the Exchange Act or any other
applicable United States securities law, the Code, or any other applicable United States governing statute or law.

SECTION 3. STOCK ISSUABLE UNDER THE PLAN; MERGERS; SUBSTITUTION

(a) Stock Issuable. The maximum number of shares of Stock reserved and available for issuance under the Plan shall be 800,000 shares, subject to adjustment as provided in

Section 3(b). For purposes of this limitation, the shares of Stock underlying any Awards under the Plan that are forfeited, canceled, held back upon exercise of an Option or
settlement of an Award to cover the exercise price or tax withholding, reacquired by the Company prior to

Exhibit 10.9

vesting, satisfied without the issuance of Stock or otherwise terminated (other than by exercise) shall be added back to the shares of Stock available for issuance under the Plan. In
the event the Company repurchases shares of Stock on the open market, such shares shall not be added to the shares of Stock available for issuance under the Plan. The shares
available for issuance under the Plan may be authorized but unissued shares of Stock or shares of Stock reacquired by the Company.

(b) Changes in Stock. Subject to Section 3(c) hereof, if, as a result of any reorganization, recapitalization, reclassification, stock dividend, stock split, reverse stock split or
other similar change in the Company’s capital stock, the outstanding shares of Stock are increased or decreased or are exchanged for a different number or kind of shares or other
securities of the Company, or additional shares or new or different shares or other securities of the Company or other non-cash assets are distributed with respect to such shares of
Stock or other securities, or, if, as a result of any merger or consolidation, sale of all or substantially all of the assets of the Company, the outstanding shares of Stock are converted
into or exchanged for securities of the Company or any successor entity (or a parent or subsidiary thereof), the Administrator shall make an appropriate or proportionate adjustment
in (i) the maximum number of shares reserved for issuance under the Plan, (ii) the number and kind of shares or other securities subject to any then outstanding Awards under the
Plan, (iii) the repurchase price, if any, per share subject to each outstanding Restricted Stock Award, and (iv) the exercise price for each share subject to any then outstanding Stock
Options and Stock Appreciation Rights under the Plan, without changing the aggregate exercise price (i.e., the exercise price multiplied by the number of Stock Options and Stock
Appreciation Rights) as to which such Stock Options and Stock Appreciation Rights remain exercisable. The Administrator shall also make equitable or proportionate adjustments in
the number of shares subject to outstanding Awards and the exercise price and the terms of outstanding Awards to take into consideration cash dividends paid other than in the
ordinary course or any other extraordinary corporate event. The adjustment by the Administrator shall be final, binding and conclusive. No fractional shares of Stock shall be issued
under the Plan resulting from any such adjustment, but the Administrator in its discretion may make a cash payment in lieu of fractional shares.

(c)        Mergers and Other Transactions. In the case of and subject to the consummation of a Sale Event, the parties thereto may cause the assumption or continuation of
Awards theretofore granted by the successor entity, or the substitution of such Awards with new Awards of the successor entity or parent thereof, with appropriate adjustment as to
the number and kind of shares and, if appropriate, the per share exercise prices, as such parties shall agree. To the extent the parties to such Sale Event do not provide for the
assumption, continuation or substitution of Awards, upon the effective time of the Sale Event, the Plan and all outstanding Awards granted hereunder shall terminate. In such case,
except as may be otherwise provided in the relevant Award Certificate, all Options and Stock Appreciation Rights that are not exercisable immediately prior to the effective time of
the Sale Event shall become fully exercisable as of the effective time of the Sale Event, all other Awards with time-based vesting, conditions or restrictions shall become fully vested
and nonforfeitable as of the effective time of the Sale Event, and all Awards with conditions and restrictions relating to the attainment of performance goals may become vested and
nonforfeitable in connection with a Sale Event in the Administrator’s discretion or to the extent specified in the relevant Award Certificate. In the event of such termination, (i) the
Company shall have the option (in its sole discretion) to make or provide for a payment, in cash or in kind, to the grantees holding Options and Stock Appreciation Rights, in
exchange for the cancellation thereof, in an amount equal to the difference between (A) the Sale Price multiplied by the number of shares of Stock subject to outstanding Options and
Stock Appreciation Rights (to the extent then exercisable at prices not in excess of the Sale Price) and (B) the aggregate exercise price of all such outstanding Options and Stock
Appreciation Rights; or (ii) each grantee shall be permitted, within a specified period of time prior to the consummation of the Sale Event as determined by the Administrator, to
exercise all outstanding Options and Stock Appreciation Rights (to the extent then exercisable) held by such grantee. The Company shall also have the option (in its sole discretion)
to make or provide for a payment, in cash or in kind, to the grantees holding other Awards in an amount equal to the Sale Price multiplied by the number of vested shares of Stock
under such Awards.

SECTION 4. ELIGIBILITY

Grantees under the Plan will be such individuals to whom the Company may issue securities without stockholder approval in accordance with Rule 5635(c)(4) of the

Marketplace Rules of the NASDAQ Stock Market, Inc. and related guidance thereunder, as are selected from time to time by the Administrator in its sole discretion.

Exhibit 10.9

SECTION 5. STOCK OPTIONS

(a) Award of Stock Options. The Administrator may grant Stock Options under the Plan. Any Stock Option granted under the Plan shall be a Non-Qualified Stock Option and

shall be in such form as the Administrator may from time to time approve.

Stock Options granted pursuant to this Section 5 shall be subject to the following terms and conditions and shall contain such additional terms and conditions, not inconsistent

with the terms of the Plan, as the Administrator shall deem desirable.

(b) Exercise Price. The exercise price per share for the Stock covered by a Stock Option granted pursuant to this Section 5 shall be determined by the Administrator at the time

of grant but shall not be less than one hundred percent (100%) of the Fair Market Value on the date of grant.

(c) Option Term. The term of each Stock Option shall be fixed by the Administrator, but no Stock Option shall be exercisable more than ten years after the date the Stock

Option is granted.

(d) Exercisability; Rights of a Stockholder. Stock Options shall become exercisable at such time or times, whether or not in installments, as shall be determined by the

Administrator at or after the grant date. The Administrator may at any time accelerate the exercisability of all or any portion of any Stock Option. An optionee shall have the rights of
a stockholder only as to shares acquired upon the exercise of a Stock Option and not as to unexercised Stock Options.

(e) Method of Exercise. Stock Options may be exercised in whole or in part, by giving written or electronic notice of exercise to the Company, specifying the number of shares

to be purchased. Payment of the purchase price may be made by one or more of the following methods except to the extent otherwise provided in the Option Award Certificate:

(i) In cash, by certified or bank check or other instrument acceptable to the Administrator;

(ii) Through the delivery (or attestation to the ownership following such procedures as the Company may prescribe) of shares of Stock that are not then subject to

restrictions under any Company plan. Such surrendered shares shall be valued at Fair Market Value on the exercise date;

(iii) By the optionee delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company
cash or a check payable and acceptable to the Company for the purchase price; provided that in the event the optionee chooses to pay the purchase price as so provided, the optionee
and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Company shall prescribe as a condition of such payment
procedure; or

(iv) By a “net exercise” arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of

shares with a Fair Market Value that does not exceed the aggregate exercise price.

Payment instruments will be received subject to collection. The transfer to the optionee on the records of the Company or of the transfer agent of the shares of Stock to be purchased
pursuant to the exercise of a Stock Option will be contingent upon receipt from the optionee (or a purchaser acting in his stead in accordance with the provisions of the Stock Option)
by the Company of the full purchase price for such shares and the fulfillment of any other requirements contained in the Option Award Certificate or applicable provisions of laws
(including the satisfaction of any withholding taxes that the Company is obligated to withhold with respect to the optionee). In the event an optionee chooses to pay the purchase
price by previously-owned shares of Stock through the attestation method, the number of shares of Stock transferred to the optionee upon the exercise of the Stock Option shall be
net of the number of attested shares. In the event that the Company establishes, for itself or using the services of a third party, an automated system for the exercise of Stock Options,
such as a system using an internet website or interactive voice response, then the paperless exercise of Stock Options may be permitted through the use of such an automated system.

SECTION 6. STOCK APPRECIATION RIGHTS

Exhibit 10.9

(a) Award of Stock Appreciation Rights. The Administrator may grant Stock Appreciation Rights under the Plan. A Stock Appreciation Right is an Award entitling the
recipient to receive shares of Stock having a value equal to the excess of the Fair Market Value of a share of Stock on the date of exercise over the exercise price of the Stock
Appreciation Right multiplied by the number of shares of Stock with respect to which the Stock Appreciation Right shall have been exercised.

(b) Exercise Price of Stock Appreciation Rights. The exercise price of a Stock Appreciation Right shall not be less than one hundred percent (100%) of the Fair Market Value

of the Stock on the date of grant.

(c) Grant and Exercise of Stock Appreciation Rights. Stock Appreciation Rights may be granted by the Administrator independently of any Stock Option granted pursuant to

Section 5 of the Plan.

(d) Terms and Conditions of Stock Appreciation Rights. Stock Appreciation Rights shall be subject to such terms and conditions as shall be determined on the date of grant by

the Administrator. The term of a Stock Appreciation Right may not exceed ten years. The terms and conditions of each such Award shall be determined by the Administrator, and
such terms and conditions may differ among individual Awards and grantees.

SECTION 7. RESTRICTED STOCK AWARDS

(a) Nature of Restricted Stock Awards. The Administrator may grant Restricted Stock Awards under the Plan. A Restricted Stock Award is any Award of Restricted Shares

subject to such restrictions and conditions as the Administrator may determine at the time of grant. Conditions may be based on continuing employment (or other service
relationship) and/or achievement of pre-established performance goals and objectives. 

(b) Rights as a Stockholder. Upon the grant of the Restricted Stock Award and payment of any applicable purchase price, a grantee shall have the rights of a stockholder with
respect to the voting of the Restricted Shares and receipt of dividends; provided that if the lapse of restrictions with respect to the Restricted Stock Award is tied to the attainment of
performance goals, any dividends paid by the Company during the performance period shall accrue and shall not be paid to the grantee until and to the extent the performance goals
are met with respect to the Restricted Stock Award. Unless the Administrator shall otherwise determine, (i) uncertificated Restricted Shares shall be accompanied by a notation on the
records of the Company or the transfer agent to the effect that they are subject to forfeiture until such Restricted Shares are vested as provided in Section 7(d) below, and
(ii) certificated Restricted Shares shall remain in the possession of the Company until such Restricted Shares are vested as provided in Section 7(d) below, and the grantee shall be
required, as a condition of the grant, to deliver to the Company such instruments of transfer as the Administrator may prescribe.

(c) Restrictions. Restricted Shares may not be sold, assigned, transferred, pledged or otherwise encumbered or disposed of except as specifically provided herein or in the

Restricted Stock Award Certificate. Except as may otherwise be provided by the Administrator either in the Award Certificate or, subject to Section 15 below, in writing after the
Award is issued, if a grantee’s employment (or other service relationship) with the Company and its Subsidiaries terminates for any reason, any Restricted Shares that have not vested
at the time of termination shall automatically and without any requirement of notice to such grantee from or other action by or on behalf of, the Company be deemed to have been
reacquired by the Company at its original purchase price (if any) from such grantee or such grantee’s legal representative simultaneously with such termination of employment (or
other service relationship), and thereafter shall cease to represent any ownership of the Company by the grantee or rights of the grantee as a stockholder. Following such deemed
reacquisition of Restricted Shares that are represented by physical certificates, a grantee shall surrender such certificates to the Company upon request without consideration.

(d) Vesting of Restricted Shares. The Administrator at the time of grant shall specify the date or dates and/or the attainment of pre-established performance goals, objectives

and other conditions on which the non-transferability of the Restricted Shares and the Company’s right of repurchase or forfeiture shall lapse. Subsequent to such date or dates and/or
the attainment of such pre-established performance goals, objectives and other conditions, the shares on which all restrictions have lapsed shall no longer be Restricted Shares and
shall be deemed “vested.”

SECTION 8. RESTRICTED STOCK UNITS

Exhibit 10.9

(a) Nature of Restricted Stock Units. The Administrator may grant Restricted Stock Units under the Plan. A Restricted Stock Unit is an Award of stock units that may be settled

in shares of Stock upon the satisfaction of such restrictions and conditions at the time of grant. Conditions may be based on continuing employment (or other service relationship)
and/or achievement of pre-established performance goals and objectives. The terms and conditions of each such Award shall be determined by the Administrator, and such terms and
conditions may differ among individual Awards and grantees. Except in the case of Restricted Stock Units with a deferred settlement date that complies with Section 409A, at the end
of the vesting period, the Restricted Stock Units, to the extent vested, shall be settled in the form of shares of Stock. Restricted Stock Units with deferred settlement dates are subject
to Section 409A and shall contain such additional terms and conditions as the Administrator shall determine in its sole discretion in order to comply with the requirements of
Section 409A.

(b) Rights as a Stockholder. A grantee shall have the rights as a stockholder only as to shares of Stock acquired by the grantee upon settlement of Restricted Stock Units;
provided, however, that the grantee may be credited with Dividend Equivalent Rights with respect to the stock units underlying his Restricted Stock Units, subject to the provisions
of Section 10 and such terms and conditions as the Administrator may determine.

(c) Termination. Except as may otherwise be provided by the Administrator either in the Award Certificate or, subject to Section 15 below, in writing after the Award is issued,

a grantee’s right in all Restricted Stock Units that have not vested shall automatically terminate upon the grantee’s termination of employment (or cessation of service relationship)
with the Company and its Subsidiaries for any reason.

SECTION 9. UNRESTRICTED STOCK AWARDS

Grant or Sale of Unrestricted Stock. The Administrator may grant (or sell at par value or such higher purchase price determined by the Administrator) an Unrestricted Stock

Award under the Plan. An Unrestricted Stock Award is an Award pursuant to which the grantee may receive shares of Stock free of any restrictions under the Plan. Unrestricted Stock
Awards may be granted in respect of past services or other valid consideration, or in lieu of cash compensation due to such grantee.

SECTION 10. DIVIDEND EQUIVALENT RIGHTS

(a) Dividend Equivalent Rights. The Administrator may grant Dividend Equivalent Rights under the Plan. A Dividend Equivalent Right is an Award entitling the grantee to

receive credits based on cash dividends that would have been paid on the shares of Stock specified in the Dividend Equivalent Right (or other Award to which it relates) if such
shares had been issued to the grantee. A Dividend Equivalent Right may be granted hereunder to any grantee as a component of an award of Restricted Stock Units or as a
freestanding award. The terms and conditions of Dividend Equivalent Rights shall be specified in the Award Certificate. Dividend equivalents credited to the holder of a Dividend
Equivalent Right may be paid currently or may be deemed to be reinvested in additional shares of Stock, which may thereafter accrue additional equivalents. Any such reinvestment
shall be at Fair Market Value on the date of reinvestment or such other price as may then apply under a dividend reinvestment plan sponsored by the Company, if any. Dividend
Equivalent Rights may be settled in cash or shares of Stock or a combination thereof, in a single installment or installments. A Dividend Equivalent Right granted as a component of
an award of Restricted Stock Units shall provide that such Dividend Equivalent Right shall be settled only upon settlement or payment of, or lapse of restrictions on, such other
Award, and that such Dividend Equivalent Right shall expire or be forfeited or annulled under the same conditions as such other Award.

(b) Termination. Except as may otherwise be provided by the Administrator either in the Award Certificate or, subject to Section 15 below, in writing after the Award is issued,

a grantee’s rights in all Dividend Equivalent Rights shall automatically terminate upon the grantee’s termination of employment (or cessation of service relationship) with the
Company and its Subsidiaries for any reason. 

SECTION 11. TRANSFERABILITY OF AWARDS

(a) Transferability. Except as provided in Section 11(b) below, during a grantee’s lifetime, his or her Awards shall be exercisable only by the grantee, or by the grantee’s legal
representative or guardian in the event of the grantee’s incapacity. No Awards shall be sold, assigned, transferred or otherwise encumbered or disposed of by a grantee other than by
will or by the laws of descent and distribution or pursuant to a domestic relations order. No

Exhibit 10.9

Awards shall be subject, in whole or in part, to attachment, execution, or levy of any kind, and any purported transfer in violation hereof shall be null and void.

(b) Administrator Action. Notwithstanding Section 11(a), the Administrator, in its discretion, may provide either in the Award Certificate regarding a given Award or by
subsequent written approval that the grantee (who is an employee or director) may transfer his or her Non-Qualified Stock Options to his or her immediate family members, to trusts
for the benefit of such family members, or to partnerships in which such family members are the only partners, provided that the transferee agrees in writing with the Company to be
bound by all of the terms and conditions of this Plan and the applicable Award. In no event may an Award be transferred by a grantee for value.

(c) Family Member. For purposes of Section 11(b), “family member” shall mean a grantee’s child, stepchild, grandchild, parent, stepparent, grandparent, spouse, former

spouse, sibling, niece, nephew, mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law, or sister-in-law, including adoptive relationships, any person sharing the
grantee’s household (other than a tenant of the grantee), a trust in which these persons (or the grantee) have more than fifty percent (50%) of the beneficial interest, a foundation in
which these persons (or the grantee) control the management of assets, and any other entity in which these persons (or the grantee) own more than fifty percent (50%) of the voting
interests.

(d) Designation of Beneficiary. To the extent permitted by the Company, each grantee to whom an Award has been made under the Plan may designate a beneficiary or

beneficiaries to exercise any Award or receive any payment under any Award payable on or after the grantee’s death. Any such designation shall be on a form provided for that
purpose by the Administrator and shall not be effective until received by the Administrator. If no beneficiary has been designated by a deceased grantee, or if the designated
beneficiaries have predeceased the grantee, the beneficiary shall be the grantee’s estate.

SECTION 12. TAX WITHHOLDING

(a) Payment by Grantee. Each grantee shall, no later than the date as of which the value of an Award or of any Stock or other amounts received thereunder first becomes
includable in the gross income of the grantee for Federal income tax purposes, pay to the Company, or make arrangements satisfactory to the Administrator regarding payment of,
any Federal, state, or local taxes of any kind required by law to be withheld by the Company with respect to such income. The Company and its Subsidiaries shall, to the extent
permitted by law, have the right to deduct any such taxes from any payment of any kind otherwise due to the grantee. The Company’s obligation to deliver evidence of book entry (or
stock certificates) to any grantee is subject to and conditioned on tax withholding obligations being satisfied by the grantee. 

(b) Payment in Stock. Subject to approval by the Administrator, a grantee may elect to have the Company’s required tax withholding obligation satisfied, in whole or in part, by

authorizing the Company to withhold from shares of Stock to be issued pursuant to any Award a number of shares with an aggregate Fair Market Value (as of the date the
withholding is effected) that would satisfy the withholding amount due; provided, however, that the amount withheld does not exceed the maximum statutory tax rate or such lesser
amount as is necessary to avoid adverse accounting treatment or as determined by the Administrator. The Administrator may also require Awards to be subject to mandatory share
withholding up to the required withholding amount. For purposes of share withholding, the Fair Market Value of withheld shares shall be determined in the same manner as the value
of Stock includible in income of the Participants.

SECTION 13. SECTION 409A AWARDS

To the extent that any Award is determined to constitute “nonqualified deferred compensation” within the meaning of Section 409A (a “409A Award”), the Award shall be
subject to such additional rules and requirements as specified by the Administrator from time to time in order to comply with Section 409A. In this regard, if any amount under a
409A Award is payable upon a “separation from service” (within the meaning of Section 409A) to a grantee who is then considered a “specified employee” (within the meaning of
Section 409A), then no such payment shall be made prior to the date that is the earlier of (i) six months and one day after the grantee’s separation from service, or (ii) the grantee’s
death, but only to the extent such delay is necessary to prevent such payment from being subject to interest, penalties and/or additional tax imposed pursuant to Section 409A.
Further, the settlement of any such Award may not be accelerated except to the extent permitted by Section 409A.

Exhibit 10.9

SECTION 14. TERMINATION OF EMPLOYMENT, TRANSFER, LEAVE OF ABSENCE, ETC.

(a) Termination of Employment. If the grantee’s employer ceases to be a Subsidiary, the grantee shall be deemed to have terminated employment for purposes of the Plan.

(b) For purposes of the Plan, the following events shall not be deemed a termination of employment:

(i) a transfer to the employment of the Company from a Subsidiary or from the Company to a Subsidiary, or from one Subsidiary to another; or

(ii) an approved leave of absence for military service or sickness, or for any other purpose approved by the Company, if the employee’s right to re-employment is
guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was granted or if the Administrator otherwise so provides in writing. 

SECTION 15. AMENDMENTS AND TERMINATION

The Board may, at any time, amend or discontinue the Plan and the Administrator may, at any time, amend or cancel any outstanding Award for the purpose of satisfying
changes in law or for any other lawful purpose, but no such action shall adversely affect rights under any outstanding Award without the holder’s consent. Except as provided in
Section 3(b) or 3(c), without prior stockholder approval, in no event may the Administrator exercise its discretion to reduce the exercise price of outstanding Stock Options or Stock
Appreciation Rights or effect the repricing of such Awards through cancellation and re-grants or cancellation of Stock Options or Stock Appreciation Rights in exchange for cash or
other Awards.  Nothing in this Section 15 shall limit the Administrator’s authority to take any action permitted pursuant to Section 3(b) or 3(c).

SECTION 16. STATUS OF PLAN

With respect to the portion of any Award that has not been exercised and any payments in cash, Stock or other consideration not received by a grantee, a grantee shall have no

rights greater than those of a general creditor of the Company unless the Administrator shall otherwise expressly determine in connection with any Award or Awards. In its sole
discretion, the Administrator may authorize the creation of trusts or other arrangements to meet the Company’s obligations to deliver Stock or make payments with respect to Awards
hereunder, provided that the existence of such trusts or other arrangements is consistent with the foregoing sentence.

SECTION 17. GENERAL PROVISIONS

(a) No Distribution. The Administrator may require each person acquiring Stock pursuant to an Award to represent to and agree with the Company in writing that such person

is acquiring the shares without a view to distribution thereof.

(b) Delivery of Stock Certificates. Stock certificates to grantees under this Plan shall be deemed delivered for all purposes when the Company or a stock transfer agent of the
Company shall have mailed such certificates in the United States mail, addressed to the grantee, at the grantee’s last known address on file with the Company. Uncertificated Stock
shall be deemed delivered for all purposes when the Company or a Stock transfer agent of the Company shall have given to the grantee by electronic mail (with proof of receipt) or
by United States mail, addressed to the grantee, at the grantee’s last known address on file with the Company, notice of issuance and recorded the issuance in its records (which may
include electronic “book entry” records). Notwithstanding anything herein to the contrary, the Company shall not be required to issue or deliver any evidence of book entry or
certificates evidencing shares of Stock pursuant to the exercise of any Award, unless and until the Administrator has determined, with advice of counsel (to the extent the
Administrator deems such advice necessary or advisable), that the issuance and delivery is in compliance with all applicable laws, regulations of governmental authorities and, if
applicable, the requirements of any exchange on which the shares of Stock are listed, quoted or traded. Any Stock issued pursuant to the Plan shall be subject to any stop-transfer
orders and other restrictions as the Administrator deems necessary or advisable to comply with federal, state or foreign jurisdiction, securities or other laws, rules and quotation
system on which the Stock is listed, quoted or traded. The Administrator may place legends on any Stock certificate or notation on any book entry to reference restrictions applicable
to the Stock. In addition to the terms and conditions provided herein, the Administrator may require that an individual make such reasonable covenants, agreements, and
representations as the Administrator, in its discretion, deems necessary or advisable in order to

Exhibit 10.9

comply with any such laws, regulations, or requirements. The Administrator shall have the right to require any individual to comply with any timing or other restrictions with respect
to the settlement or exercise of any Award, including a window-period limitation, as may be imposed in the discretion of the Administrator.

(c) Stockholder Rights. Until Stock is deemed delivered in accordance with Section 17(b), no right to vote or receive dividends or any other rights of a stockholder will exist

with respect to shares of Stock to be issued in connection with an Award, notwithstanding the exercise of a Stock Option or any other action by the grantee with respect to an Award.

(d) Other Compensation Arrangements; No Employment Rights. Nothing contained in this Plan shall prevent the Board from adopting other or additional compensation
arrangements, including trusts, and such arrangements may be either generally applicable or applicable only in specific cases. The adoption of this Plan and the grant of Awards do
not confer upon any employee any right to continued employment with the Company or any Subsidiary.

(e) Trading Policy Restrictions. Option exercises and other Awards under the Plan shall be subject to the Company’s insider trading policies and procedures, as in effect from

time to time.

(f) Clawback Policy. Awards under the Plan shall be subject to the Company’s clawback policy, as in effect from time to time.

SECTION 18. EFFECTIVE DATE OF PLAN

This Plan shall become effective upon approval by the Board. 

SECTION 19. GOVERNING LAW

This Plan and all Awards and actions taken thereunder shall be governed by, and construed in accordance with, the laws of the State of Delaware, applied without regard to

conflict of law principles.

DATE APPROVED BY BOARD OF DIRECTORS: January 14, 2022

Exhibit 10.10

NON-QUALIFIED STOCK OPTION AGREEMENT
FOR COMPANY EMPLOYEES
UNDER DECIPHERA PHARMACEUTICALS, INC.
2022 INDUCEMENT PLAN

Name of Optionee:

No. of Option Shares:

Option Exercise Price per Share:

Grant Date:

Expiration Date:

Pursuant to the Deciphera Pharmaceuticals, Inc. 2022 Inducement Plan as amended through the date hereof (the “Plan”), Deciphera
Pharmaceuticals, Inc. (the “Company”) hereby grants to the Optionee named above an option (the “Stock Option”) to purchase on or prior to the
Expiration Date specified above all or part of the number of shares of Common Stock, par value $0.01 per share (the “Stock”) of the Company
specified above at the Option Exercise Price per Share specified above subject to the terms and conditions set forth herein and in the Plan. This Stock
Option has been granted as an inducement pursuant to Rule 5635(c)(4) of the Marketplace Rules of NASDAQ Stock Market, Inc. This Stock Option is
not intended to be an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986, as amended.

1. Exercisability Schedule. No portion of this Stock Option may be exercised until such portion shall have become exercisable. Except as set

forth below, and subject to the discretion of the Administrator (as defined in Section 2 of the Plan) to accelerate the exercisability schedule hereunder,
this Stock Option shall vest and become exercisable with respect to the following number of Option Shares on the dates indicated; provided that the
Optionee continues to have a Service Relationship at such time. For purposes of this Agreement, “Vesting Commencement Date” shall mean.

[INSERT VESTING SCHEDULE]

 If Vest Type equals “Monthly,” the number of shares shown as exercisable will vest ratably per month from the previous date exercisable until the
#
final date exercisable.

Once exercisable, this Stock Option shall continue to be exercisable at any time or times prior to the close of business on the Expiration Date,

subject to the provisions hereof and of the Plan.

The vesting of this Stock Option shall accelerate in full if, on or within 12 months following, the consummation of a Change in Control Event,

the Optionee's Service Relationship

Exhibit 10.10

with the Company, any Subsidiary or the acquiring or succeeding entity (or an affiliate thereof) is terminated by the Company, any Subsidiary or such
entity without Cause.

“Cause” shall mean, unless otherwise provided in an employment or other service agreement between the Company or any Subsidiary and the

Optionee, willful misconduct by the Optionee or willful failure by the Optionee to perform his or her responsibilities to the Company or any Subsidiary
(including, without limitation, breach by the Optionee of any provision of any employment, consulting, advisory, nondisclosure, non-competition or
other similar agreement between the Optionee and the Company or any Subsidiary), as determined by the Company or any Subsidiary, which
determination shall be conclusive. The Optionee shall be considered to have been terminated for Cause if the Company or any Subsidiary determines,
within 30 days after the Optionee's resignation, that termination for Cause was warranted.

“Change in Control Event” shall mean, unless otherwise provided in an employment or other service agreement between the Company or any

Subsidiary and the Optionee:

(i) the acquisition after the date hereof by an individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of
the Exchange Act (a “Person”) of (x) beneficial ownership (within the meaning of Rule 13d-3 under the Exchange Act) of any equity or membership
interest in the Company if, after (but not before) such acquisition, such Person beneficially owns (within the meaning of Rule 13d-3 under the
Exchange Act) more than 50% of the combined voting power of the then-outstanding equity or membership interests of the Company having the right
to elect directors of the Company (or otherwise having the right to direct the operation and management of the Company), or (y) the sole power, by the
terms of the organizational documents of the Company or by contract, to direct the operation and management of the Company; provided, however,
that for purposes of this subsection (1), the following acquisitions shall not constitute a Change in Control: (i) any acquisition directly from the
Company (excluding an acquisition pursuant to the exercise, conversion or exchange of any security exercisable for, convertible into or exchangeable
for voting securities of the Company, unless the Person exercising, converting or exchanging such security acquired such security directly from the
Company or an underwriter or agent of the Company), (ii) any acquisition by the Company, (iii) any acquisition by any employee benefit plan (or
related trust) sponsored or maintained by the Company or any corporation controlling or controlled by the Company, or (iv) any acquisition by any
entity pursuant to a Sale (as defined below) which complies with clauses (x) and (y) of subsection (ii) of this definition; or

(ii) the consummation of a sale or other disposition of all or substantially all of the assets of the Company (a “Sale”), unless,

immediately following such Sale, each of the following two conditions is satisfied: (x) all or substantially all of the individuals and entities who were
the beneficial owners of the equity or membership interests in the Company immediately prior to such Sale beneficially own, directly or indirectly,
more than 50% of the then-outstanding equity or membership interests and the combined voting power of the then-outstanding securities having the
right to elect directors (or otherwise having the right to direct the operation and management), respectively, of the resulting or acquiring entity in such
Sale (which shall include, without limitation, an entity which as a result of such transaction owns

Exhibit 10.10

the Company or substantially all of the Company's assets either directly or through one or more subsidiaries) (such resulting or acquiring entity is
referred to herein as the “Acquiring Entity”) in substantially the same proportions as their ownership of the equity or membership interest in the
Company immediately prior to such Sale and (y) no Person (excluding any employee benefit plan (or related trust) maintained or sponsored by the
Company or by the Acquiring Entity) beneficially owns, directly or indirectly, 50% or more of the then-outstanding equity or membership interests in
the Acquiring Entity or of the combined voting power of the then-outstanding securities of such entity having the right to elect directors (or otherwise
having the right to direct the operation and management of such entity) (except to the extent that such ownership existed prior to the Sale).

Notwithstanding any other provision in this definition, where required to avoid additional taxation under Section 409A of the Code, the event
that occurs must also be a “change in the ownership or effective control of a corporation, or a change in the ownership of a substantial portion of the
assets of a corporation” as defined in Treas. Reg. Section 1.409A‑3(i)(5).

“Service  Relationship”  means  any  relationship  as  an  employee,  director  or  consultant  of  the  Company  or  any  Subsidiary  (e.g.,  a  Service
Relationship  shall  be  deemed  to  continue  without  interruption  in  the  event  an  individual’s  status  changes  from  full-time  employee  to  part-time
employee or consultant).

2. Manner of Exercise.

(a) The Optionee may exercise this Stock Option only in the following manner: from time to time on or prior to the Expiration Date of

this Stock Option, the Optionee may give written notice to the Administrator of his or her election to purchase some or all of the Option Shares
purchasable at the time of such notice. This notice shall specify the number of Option Shares to be purchased.

Payment of the purchase price for the Option Shares may be made by one or more of the following methods: (i) in cash, by certified or bank
check or other instrument acceptable to the Administrator; (ii) to the extent permitted by the Administrator, through the delivery (or attestation to the
ownership) of shares of Stock that have been purchased by the Optionee on the open market or that are beneficially owned by the Optionee and are not
then subject to any restrictions under any Company plan and that otherwise satisfy any holding periods as may be required by the Administrator; (iii)
by the Optionee delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to
the Company cash or a check payable and acceptable to the Company to pay the option purchase price, provided that in the event the Optionee chooses
to pay the option purchase price as so provided, the Optionee and the broker shall comply with such procedures and enter into such agreements of
indemnity and other agreements as the Administrator shall prescribe as a condition of such payment procedure; (iv) by a “net exercise” arrangement
pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair
Market Value that does not exceed the aggregate exercise price; or (v) a combination of (i), (ii), (iii) and (iv) above. Payment instruments will be
received subject to collection.

Exhibit 10.10

The transfer to the Optionee on the records of the Company or of the transfer agent of the Option Shares will be contingent upon (i) the
Company's receipt from the Optionee of the full purchase price for the Option Shares, as set forth above, (ii) the fulfillment of any other requirements
contained herein or in the Plan or in any other agreement or provision of laws, and (iii) the receipt by the Company of any agreement, statement or
other evidence that the Company may require to satisfy itself that the issuance of Stock to be purchased pursuant to the exercise of Stock Options under
the Plan and any subsequent resale of the shares of Stock will be in compliance with applicable laws and regulations. In the event the Optionee chooses
to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock transferred to the
Optionee upon the exercise of the Stock Option shall be net of the shares of Stock attested to.

(b) The shares of Stock purchased upon exercise of this Stock Option shall be transferred to the Optionee on the records of the Company

or of the transfer agent upon compliance to the satisfaction of the Administrator with all requirements under applicable laws or regulations in
connection with such transfer and with the requirements hereof and of the Plan. The determination of the Administrator as to such compliance shall be
final and binding on the Optionee. The Optionee shall not be deemed to be the holder of, or to have any of the rights of a holder with respect to, any
shares of Stock subject to this Stock Option unless and until this Stock Option shall have been exercised pursuant to the terms hereof, the Company or
the transfer agent shall have transferred the shares to the Optionee, and the Optionee's name shall have been entered as the stockholder of record on the
books of the Company. Thereupon, the Optionee shall have full voting, dividend and other ownership rights with respect to such shares of Stock.

(c) The minimum number of shares with respect to which this Stock Option may be exercised at any one time shall be 100 shares, unless

the number of shares with respect to which this Stock Option is being exercised is the total number of shares subject to exercise under this Stock
Option at the time.

(d) Notwithstanding any other provision hereof or of the Plan, no portion of this Stock Option shall be exercisable after the Expiration

Date hereof.

3. Termination of Service Relationship. If the Optionee's Service Relationship is terminated, the period within which to exercise the Stock

Option may be subject to earlier termination as set forth below.

(a) Termination Due to Death. If the Optionee's Service Relationship terminates by reason of the Optionee's death, any portion of this

Stock Option outstanding on such date, to the extent exercisable on the date of death, may thereafter be exercised by the Optionee's legal representative
or legatee for a period of 12 months from the date of death or until the Expiration Date, if earlier. Any portion of this Stock Option that is not
exercisable on the date of death shall terminate immediately and be of no further force or effect.

(b) Termination Due to Disability. If the Optionee's Service Relationship terminates by reason of the Optionee's disability (as

determined by the Administrator), any portion of this Stock Option outstanding on such date, to the extent exercisable on the date of

Exhibit 10.10

such termination, may thereafter be exercised by the Optionee for a period of 12 months from the date of termination or until the Expiration Date, if
earlier. Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further force or
effect.

(c) Termination for Cause. If the Optionee's Service Relationship terminates for Cause, any portion of this Stock Option outstanding on

such date shall terminate immediately and be of no further force and effect.

(d) Other Termination. If the Optionee's Service Relationship terminates for any reason other than the Optionee's death, the Optionee's

disability or Cause, and unless otherwise determined by the Administrator, any portion of this Stock Option outstanding on such date may be exercised,
to the extent exercisable on the date of termination, for a period of three months from the date of termination or until the Expiration Date, if earlier.
Any portion of this Stock Option that is not exercisable on the date of termination shall terminate immediately and be of no further force or effect.

The Administrator's determination of the reason for termination of the Optionee's Service Relationship shall be conclusive and binding on the

Optionee and his or her representatives or legatees.

4. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Stock Option shall be subject to and governed by all the terms
and conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall
have the meaning specified in the Plan, unless a different meaning is specified herein.

5. Transferability. This Agreement is personal to the Optionee, is non-assignable and is not transferable in any manner, by operation of law or

otherwise, other than by will or the laws of descent and distribution. This Stock Option is exercisable, during the Optionee's lifetime, only by the
Optionee, and thereafter, only by the Optionee's legal representative or legatee.

6. Tax Withholding. The Optionee shall, not later than the date as of which the exercise of this Stock Option becomes a taxable event for
Federal income tax purposes, pay to the Company or make arrangements satisfactory to the Administrator for payment of any Federal, state, and local
taxes required by law to be withheld on account of such taxable event. The Company shall have the authority to cause the required tax withholding
obligation to be satisfied, in whole or in part, by withholding from shares of Stock to be issued to the Optionee a number of shares of Stock with an
aggregate Fair Market Value that would satisfy the withholding amount due; provided, however, that the amount withheld does not exceed the
maximum statutory tax rate or such lesser amount as is necessary to avoid adverse accounting treatment or as determined by the Administrator.

7. No Obligation to Continue Service Relationship. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or this

Agreement to continue the Optionee’s

Exhibit 10.10

Service Relationship and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate
the Service Relationship of the Optionee at any time.

8. Integration. This Agreement constitutes the entire agreement between the parties with respect to this Stock Option and supersedes all prior

agreements and discussions between the parties concerning such subject matter.

9. Data Privacy Consent. In order to administer the Plan and this Agreement and to implement or structure future equity grants, the Company,

its subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may process any and all personal or professional data,
including but not limited to Social Security or other identification number, home address and telephone number, date of birth and other information that
is necessary or desirable for the administration of the Plan and/or this Agreement (the “Relevant Information”). By entering into this Agreement, the
Optionee (i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any
privacy rights the Optionee may have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such
information in electronic form; and (iv) authorizes the transfer of the Relevant Information to any jurisdiction in which the Relevant Companies
consider appropriate. The Optionee shall have access to, and the right to change, the Relevant Information. Relevant Information will only be used in
accordance with applicable law.

10. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or delivered to

the Optionee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party
in writing.

[Remainder of page intentionally left blank.]

Exhibit 10.10

DECIPHERA PHARMACEUTICALS, INC.

By:
Name:
Title:

The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned. Electronic acceptance of this
Agreement pursuant to the Company's instructions to the Optionee (including through an online acceptance process) is acceptable.

Dated: ______________________

Optionee's Signature

Optionee's name and address:

Exhibit 10.11

RESTRICTED STOCK UNIT AWARD AGREEMENT
FOR COMPANY EMPLOYEES
UNDER DECIPHERA PHARMACEUTICALS, INC.
2022 INDUCEMENT PLAN

Name of Grantee:

No. of Restricted Stock Units:

Grant Date:

Pursuant to the Deciphera Pharmaceuticals, Inc. 2022 Inducement Plan as amended through the date hereof (the “Plan”), Deciphera
Pharmaceuticals, Inc. (the “Company”) hereby grants an award of the number of Restricted Stock Units listed above (an “Award”) to the Grantee
named above. Each Restricted Stock Unit shall relate to one share of Common Stock, par value $0.01 per share (the “Stock”) of the Company. This
Award has been granted as an inducement pursuant to Rule 5635(c)(4) of the Marketplace Rules of NASDAQ Stock Market, Inc.

Restrictions on Transfer of Award. This Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the

1.
Grantee, and any shares of Stock issuable with respect to the Award may not be sold, transferred, pledged, assigned or otherwise encumbered or
disposed of until (i) the Restricted Stock Units have vested as provided in Paragraph 2 of this Agreement and (ii) shares of Stock have been issued to
the Grantee in accordance with the terms of the Plan and this Agreement.

2.
Vesting of Restricted Stock Units. The restrictions and conditions of Paragraph 1 of this Agreement shall lapse on the Vesting Date or Dates
specified in the following schedule so long as the Grantee remains in a Service Relationship on such Dates. If a series of Vesting Dates is specified,
then the restrictions and conditions in Paragraph 1 shall lapse only with respect to the number of Restricted Stock Units specified as vested on such
date.

The Administrator may at any time accelerate the vesting schedule specified in this Paragraph 2.

[INSERT VESTING SCHEDULE]

Termination of Service. If the Grantee’s Service Relationship terminates for any reason (including death or disability) prior to the satisfaction of

3.
the vesting conditions set forth in Paragraph 2 above, any Restricted Stock Units that have not vested as of such date shall automatically and without
notice terminate and be forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter
have any further rights or interests in such unvested Restricted Stock Units.

Notwithstanding the foregoing, the vesting of the Restricted Stock Units shall accelerate in full if, on or within 12 months following, the

consummation of a Change in Control Event, the Grantee’s Service Relationship with the Company, any Subsidiary or the acquiring or succeeding

Exhibit 10.11

entity (or an affiliate thereof) is terminated by the Company, any Subsidiary or such entity without Cause.

“Cause” shall mean, unless otherwise provided in an employment or other service agreement between the Company or any Subsidiary and the

Grantee, willful misconduct by the Grantee or willful failure by the Grantee to perform his or her responsibilities to the Company or any Subsidiary
(including, without limitation, breach by the Grantee of any provision of any employment, consulting, advisory, nondisclosure, non-competition or
other similar agreement between the Grantee and the Company or any Subsidiary), as determined by the Company or any Subsidiary, which
determination shall be conclusive. The Grantee shall be considered to have been terminated for Cause if the Company or any Subsidiary determines,
within 30 days after the Grantee’s resignation, that termination for Cause was warranted.

“Change in Control Event” shall mean, unless otherwise provided in an employment or other service agreement between the Company or any

Subsidiary and the Grantee:

(i) the acquisition after the date hereof by an individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of
the Exchange Act (a “Person”) of (x) beneficial ownership (within the meaning of Rule 13d-3 under the Exchange Act) of any equity or membership
interest in the Company if, after (but not before) such acquisition, such Person beneficially owns (within the meaning of Rule 13d-3 under the
Exchange Act) more than 50% of the combined voting power of the then-outstanding equity or membership interests of the Company having the right
to elect directors of the Company (or otherwise having the right to direct the operation and management of the Company), or (y) the sole power, by the
terms of the organizational documents of the Company or by contract, to direct the operation and management of the Company; provided, however,
that for purposes of this subsection (1), the following acquisitions shall not constitute a Change in Control: (i) any acquisition directly from the
Company (excluding an acquisition pursuant to the exercise, conversion or exchange of any security exercisable for, convertible into or exchangeable
for voting securities of the Company, unless the Person exercising, converting or exchanging such security acquired such security directly from the
Company or an underwriter or agent of the Company), (ii) any acquisition by the Company, (iii) any acquisition by any employee benefit plan (or
related trust) sponsored or maintained by the Company or any corporation controlling or controlled by the Company, or (iv) any acquisition by any
entity pursuant to a Sale (as defined below) which complies with clauses (x) and (y) of subsection (ii) of this definition; or

(ii) the consummation of a sale or other disposition of all or substantially all of the assets of the Company (a “Sale”), unless,

immediately following such Sale, each of the following two conditions is satisfied: (x) all or substantially all of the individuals and entities who were
the beneficial owners of the equity or membership interests in the Company immediately prior to such Sale beneficially own, directly or indirectly,
more than 50% of the then-outstanding equity or membership interests and the combined voting power of the then-outstanding securities having the
right to elect directors (or otherwise having the right to direct the operation and management), respectively, of the resulting or acquiring entity in such
Sale (which shall include, without limitation, an entity which as a result of such transaction owns the Company or

Exhibit 10.11

substantially all of the Company’s assets either directly or through one or more subsidiaries) (such resulting or acquiring entity is referred to herein as
the “Acquiring Entity”) in substantially the same proportions as their ownership of the equity or membership interest in the Company immediately
prior to such Sale and (y) no Person (excluding any employee benefit plan (or related trust) maintained or sponsored by the Company or by the
Acquiring Entity) beneficially owns, directly or indirectly, 50% or more of the then-outstanding equity or membership interests in the Acquiring Entity
or of the combined voting power of the then-outstanding securities of such entity having the right to elect directors (or otherwise having the right to
direct the operation and management of such entity) (except to the extent that such ownership existed prior to the Sale).

Notwithstanding any other provision in this definition, where required to avoid additional taxation under Section 409A of the Code, the event
that occurs must also be a “change in the ownership or effective control of a corporation, or a change in the ownership of a substantial portion of the
assets of a corporation” as defined in Treas. Reg. Section 1.409A‑3(i)(5).

“Service  Relationship”  means  any  relationship  as  an  employee,  director  or  consultant  of  the  Company  or  any  Subsidiary  (e.g.,  a  Service
Relationship  shall  be  deemed  to  continue  without  interruption  in  the  event  an  individual’s  status  changes  from  full-time  employee  to  part-time
employee or consultant).

Issuance of Shares of Stock. As soon as practicable following each Vesting Date (but in no event later than two and one-half months after the

4.
end of the year in which the Vesting Date occurs), the Company shall issue to the Grantee the number of shares of Stock equal to the aggregate number
of Restricted Stock Units that have vested pursuant to Paragraph 2 of this Agreement on such date and the Grantee shall thereafter have all the rights of
a stockholder of the Company with respect to such shares.

5.
Incorporation of Plan. Notwithstanding anything herein to the contrary, this Agreement shall be subject to and governed by all the terms and
conditions of the Plan, including the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have
the meaning specified in the Plan, unless a different meaning is specified herein.

Tax Withholding; Mandatory Sell to Cover. In connection with the settlement of vested Restricted Stock Units, the Company shall issue the

6.
shares of Stock referred to in Paragraph 4 to a broker designated by the Company and acting on behalf and for the account of the Grantee with
instructions to (i) sell a number of shares of such Stock sufficient to satisfy the applicable withholding taxes which arise in connection with such
settlement; provided, that the amount sold does not exceed the maximum statutory tax rate or such lesser amount as is necessary to avoid liability
accounting treatment, along with any applicable third-party commission, and (ii) remit the proceeds of such sale to the Company. In the event the sale
proceeds are insufficient to fully satisfy the applicable withholding taxes, the Grantee authorizes withholding from payroll and any other amounts
payable to the Grantee, in the same calendar year, and otherwise agrees to make adequate provision through the submission of cash, a check or its
equivalent for any sums required to satisfy the applicable withholding taxes. Unless the withholding tax obligations of the Company and/or any
Affiliate thereof are satisfied, the Company shall have no obligation to issue any shares of Stock on the Grantee’s behalf pursuant to the vesting of the
Restricted Stock Units.

Exhibit 10.11

Section 409A of the Code. This Agreement shall be interpreted in such a manner that all provisions relating to the settlement of the Award are

7.
exempt from the requirements of Section 409A of the Code as “short-term deferrals” as described in Section 409A of the Code.

No Obligation to Continue Service. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or this Agreement to

8.
continue the Grantee’s Service Relationship, and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any
Subsidiary to terminate the Grantee’s Service Relationship at any time.

Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all prior agreements

9.
and discussions between the parties concerning such subject matter.

Data Privacy Consent. In order to administer the Plan and this Agreement and to implement or structure future equity grants, the Company, its

10.
subsidiaries and affiliates and certain agents thereof (together, the “Relevant Companies”) may process any and all personal or professional data,
including but not limited to Social Security or other identification number, home address and telephone number, date of birth and other information that
is necessary or desirable for the administration of the Plan and/or this Agreement (the “Relevant Information”). By entering into this Agreement, the
Grantee (i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any
privacy rights the Grantee may have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such
information in electronic form; and (iv) authorizes the transfer of the Relevant Information to any jurisdiction in which the Relevant Companies
consider appropriate. The Grantee shall have access to, and the right to change, the Relevant Information. Relevant Information will only be used in
accordance with applicable law.

Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or delivered to the

11.
Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in
writing.

[Remainder of page intentionally left blank]

Exhibit 10.11

DECIPHERA PHARMACEUTICALS, INC.

By:
Title:

The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned. Electronic acceptance of this
Agreement pursuant to the Company’s instructions to the Grantee (including through an online acceptance process) is acceptable.

Dated: ________________________

Grantee’s Signature

Grantee’s name and address:

Address:

The following is a list of significant subsidiaries of Deciphera Pharmaceuticals, Inc. as of December 31, 2021.

DECIPHERA PHARMACEUTICALS, INC.

SUBSIDIARY
Deciphera Pharmaceuticals, LLC
Deciphera Pharmaceuticals Securities Corporation

STATE OR OTHER JURISDICTION OF INCORPORATION OR
ORGANIZATION
Delaware
Massachusetts

Exhibit 21

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-220866, 333-223992, 333-230270, 333-237031, 333-252904) and Form
S-3 (No. 333-236389) of Deciphera Pharmaceuticals, Inc. of our report dated February 8, 2022 relating to the financial statements and the effectiveness of internal control over
financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

February 8, 2022

Exhibit 31.1

I, Steven L. Hoerter, certify that:

1. I have reviewed this Annual Report on Form 10-K of Deciphera Pharmaceuticals, 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 8, 2022

By:

/s/ Steven L. Hoerter
Steven L. Hoerter

President and Chief Executive Officer
(Principal Executive Officer)

Exhibit 31.2

I, Thomas P. Kelly, certify that:

1. I have reviewed this Annual Report on Form 10-K of Deciphera Pharmaceuticals, 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 8, 2022

By:

/s/ Thomas P. Kelly
Thomas P. Kelly
Chief Financial Officer
(Principal Financial and Accounting Officer)

CERTIFICATION 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  the  Annual  Report  on  Form  10-K  of  Deciphera  Pharmaceuticals,  Inc.  (the  “Company”)  for  the  fiscal  year  ended  December  31,  2021  as  filed  with  the
Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Steven L. Hoerter, President and Chief Executive Officer 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 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 8, 2022

By:

/s/ Steven L. Hoerter
Steven L. Hoerter

President and Chief Executive Officer
(Principal Executive Officer)

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.2

In  connection  with  the  Annual  Report  on  Form  10-K  of  Deciphera  Pharmaceuticals,  Inc.  (the  “Company”)  for  the  fiscal  year  ended  December  31,  2021  as  filed  with  the
Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Thomas P. Kelly, Chief Financial Officer 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 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 8, 2022

By:

/s/ Thomas P. Kelly
Thomas P. Kelly
Chief Financial Officer
(Principal Financial and Accounting Officer)