You should read the following discussion and analysis of our financial condition
and results of operations together with our consolidated financial statements
and related notes thereto included elsewhere in this Annual Report on Form 10-K.
Some of the information contained in this discussion and analysis or set forth
elsewhere in this Annual Report on Form 10-K, including information with respect
to our plans and strategy for our business and related financing, 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 Annual Report on 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.

References in the following discussion to "we," "our," "us," "Mirati" or "the Company" refer to Mirati Therapeutics, Inc. and its subsidiaries.



Company Overview
Mirati Therapeutics, Inc. is a clinical-stage oncology company developing novel
therapeutics to address the genetic and immunological promoters of cancer.
MRTX849 is an investigational, selective, specific, potent and orally available
KRAS G12C inhibitor in clinical development as a monotherapy and in combination
with other agents. Adagrasib is the provisionally filed nonproprietary name for
MRTX849. MRTX1133 is an investigational, selective, specific and potent KRAS
G12D inhibitor in preclinical development. Sitravatinib is an investigational
spectrum-selective kinase inhibitor designed to potently inhibit receptor
tyrosine kinases ("RTK"s) and enhance immune responses through the inhibition of
immunosuppressive signaling. We also have additional preclinical discovery
programs which include potentially first-in-class and best-in-class product
candidates specifically designed to address mutations and tumors where few
treatment options exist. We approach each of our discovery and development
programs with a singular focus: to translate our deep understanding of the
molecular drivers of cancer into better therapies and better outcomes for
patients.

Critical Accounting Policies and Significant Judgments and Estimates



Our discussion and analysis of financial condition and results of operations are
based upon our consolidated financial statements, which have been prepared in
accordance with U.S. generally accepted accounting principles. The preparation
of these financial statements requires us to make significant estimates and
judgments that affect the reported amounts of assets, liabilities, revenue and
expenses and related disclosures. On an ongoing basis, our actual results may
differ significantly from our estimates.

While our significant accounting policies are more fully described in Note 2 to
our consolidated financial statements appearing elsewhere in this Annual Report
on Form 10-K, we believe the following accounting policies to be critical to the
judgments and estimates used in the preparation of our consolidated financial
statements.

Revenue Recognition

Under Accounting Standards Codification ("ASC") Topic 606 ("Topic 606"), we
recognize revenue when our 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 contracts with customers, we perform 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; (iv)
allocate the transaction price to the performance obligations in the contract;
and (v) recognize revenue when (or as) the entity satisfies a performance
obligation. We only apply the five-step model to contracts when it is probable
that we will collect the consideration we are entitled to in exchange for the
goods or services we transfer. At contract inception, once the contract is
determined to be within the scope of Topic 606, we assess the goods or services
promised within each contract, determine those that are performance obligations,
and assess whether each promised good or service is distinct. We then recognize
as revenue the amount of the transaction price that is allocated to the
respective performance obligation when (or as) the performance obligation is
satisfied. We utilize key assumptions to determine a stand-alone selling price
for performance obligations, which may include revenue forecasts, expected
development timelines, discount rates, probabilities of technical and regulatory
success and costs for manufacturing clinical supplies. Because the amount of
revenue recognized for each performance obligation is determined based upon its
relative stand-alone selling price, an increase or decrease of 10% in the
estimated fair value of each performance obligation would not have a significant
impact on the amount of revenue recognized.
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Accrued Research and Development Expenses



We accrue and expense clinical trial activities performed by third parties based
upon estimates of the proportion of work completed over the life of the
individual clinical trial and patient enrollment rates in accordance with
agreements established with clinical research organizations ("CROs") and
clinical trial sites. We determine the estimates by reviewing contracts, vendor
agreements and purchase orders, and through discussions with internal clinical
personnel and external service providers as to the progress or stage of
completion of trials or services and the agreed-upon fee to be paid for such
services. However, actual costs and timing of clinical trials are highly
uncertain, subject to risks and may change depending upon a number of factors,
including our clinical development plan.

We make estimates of our accrued expenses as of each balance sheet date in our
consolidated financial statements based on facts and circumstances known to us
at that time. If the actual timing of the performance of services or the level
of effort varies from the estimate, we will adjust the accrual accordingly.
Nonrefundable advance payments for goods and services, including fees for
process development or manufacturing and distribution of clinical supplies that
will be used in future research and development activities, are deferred and
recognized as expense in the period that the related goods are consumed or
services are performed.

Share-Based Compensation Expense



We measure and recognize compensation expense for share-based payments based on
estimated fair value. We estimate the fair value of stock options granted using
the Black-Scholes option-pricing model. The Black-Scholes option- pricing model
requires the use of certain estimates and judgmental assumptions that affect the
amount of share-based compensation expense recognized in our consolidated
financial statements. These assumptions include the expected volatility of our
stock price, expected term of the options, the risk-free interest rate and
expected dividend yields. We estimate the fair value of restricted stock units
granted based on the closing market price of our common stock on the date of
grant. Share-based compensation is recognized using the graded accelerated
vesting method. If any of the assumptions used in our calculation change
significantly, share-based compensation expense may differ materially from what
we have recorded in the current period.

Results of Operations

Comparison of the Years Ended December 31, 2020 and 2019



This section provides an analysis of our financial results for the fiscal year
ended December 31, 2020 compared to the fiscal year ended December 31, 2019. For
the discussion covering the fiscal year ended December 31, 2019 compared to the
fiscal year ended December 31, 2018, please refer to Item 7, "Management's
Discussion and Analysis of Financial Condition and Results of Operations" in our
Annual Report on Form 10-K for the fiscal year ended December 31, 2019 filed
with the SEC on February 26, 2020.

The following table summarizes our results of operations for the year ended December 31, 2020 and 2019 (in thousands):


                                                 Year Ended December 31,
                                                   2020

2019 Increase


    License and collaboration revenues    $      13,398              $  

3,335 $ 10,063


    Research and development expenses           299,349               

182,866 116,483


    General and administrative expenses          83,412                42,573        40,839
    Other income, net                            11,426                 8,848         2,578


License and collaboration revenues



License and collaboration revenues relate to the BeiGene Agreement under which
BeiGene was granted an exclusive license to develop, manufacture and
commercialize sitravatinib in the Licensed Territory, as well as a license
agreement (the "ORIC License Agreement") with ORIC Pharmaceuticals, Inc.
("ORIC") pursuant to which the Company granted to ORIC an exclusive, worldwide
license to develop and commercialize the Company's allosteric polycomb
repressive complex 2 ("PRC2") inhibitors for all indications. License and
collaboration revenues for the year ended December 31, 2020 were $13.4 million,
of which $11.4 million related to the transfer of the license and related
know-how to ORIC under the ORIC License Agreement,
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and $2.0 million related to the manufacturing supply services agreement with
BeiGene. License and collaboration revenues for the year ended December 31, 2019
were $3.3 million and relate to the manufacturing supply services agreement with
BeiGene.

Research and Development Expenses

Research and development expenses consist primarily of:

•salaries and related expenses for personnel, including expenses related to stock options, or other share-based compensation granted to personnel in development functions;



•fees paid to external service providers such as CROs and contract manufacturing
organizations related to clinical trials, including contractual obligations for
clinical development, clinical sites, manufacturing and scale-up, and
formulation of clinical drug supplies;

•fees paid to contract services related to drug discovery efforts including chemistry and biology services;

•license fees paid in connection with our early discovery efforts; and

•costs for allocated facilities and depreciation of equipment.

We record research and development expenses as incurred.



Our research and development efforts during the years ended December 31, 2020
and 2019 were focused primarily on our clinical development programs and our
preclinical programs. The following table summarizes our research and
development expenses, (in thousands):
                                                                       Year Ended December 31,                 Increase
                                                                       2020                   2019            (Decrease)

Third-party research and development expenses:


  Clinical development programs:
MRTX849                                                        $     121,689              $  53,778          $   67,911
Sitravatinib                                                          57,276                 60,952              (3,676)
Discontinued programs                                                  1,900                  2,995              (1,095)
  Pre-clinical development programs:
MRTX1133                                                              10,297                  7,540               2,757
Preclinical and early discovery                                       11,873                  3,353               8,520
Total third-party research and development expenses                  203,035                128,618              74,417
Salaries and other employee related expense                           37,545                 19,835              17,710
Share-based compensation expense                                      48,044                 31,024              17,020
Other research and development costs                                  10,725                  3,389               7,336
Research and development expense                               $     299,349              $ 182,866          $  116,483



Research and development expenses for the year ended December 31, 2020 were
$299.3 million compared to $182.9 million during the year ended December 31,
2019. The increase of $116.4 million during the year ended December 31, 2020
relates to an increase in third-party research and development expenses of $74.4
million, an increase in salaries and other employee related expense of $17.7
million, an increase in share-based compensation expense of $17.0 million, and
an increase in other research and development costs of $7.3 million. The
increase in third-party research and development expense primarily relates to an
increase in expenses associated with the development of MRTX849 of $67.9
million. The increase in expenses associated with MRTX849 relates to the Phase
1/2 clinical trial which was initiated in the first quarter of 2019, and a Phase
2 clinical trial which was initiated in the first quarter of 2020, and the costs
are comprised largely of manufacturing expenses, CRO fees and other clinical
trial-related expenses. The increase in salaries and other employee related
expense of $17.7 million is primarily due to an increase in the number of
research and development employees during the year ended December 31, 2020
compared to the same period in 2019. The increase in share-based compensation of
$17.0 million is due to an increase in the fair value of equity awards granted
and an increase in headcount during the year ended December 31, 2020
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compared to the same period in 2019. The increase in other research and development costs of $7.3 million is primarily due to increases in costs associated with professional and consulting services, as well as temporary worker expenses.



At this time, due to the risks inherent in the clinical development process and
product development programs we are unable to estimate with any certainty the
costs we will incur in the continued development of MRTX849 and sitravatinib.
The process of conducting clinical trials necessary to obtain regulatory
approval and manufacturing scale-up to support expanded development and
potential future commercialization is costly and time consuming. Any failure by
us or delay in completing clinical trials, manufacturing scale up or in
obtaining regulatory approvals could lead to increased research and development
expense and, in turn, have a material adverse effect on our results of
operations. We expect that our research and development expenses may increase if
we are successful in advancing MRTX849, sitravatinib and MRTX1133, or any of our
other preclinical programs into more advanced stages of clinical development.

General and Administrative Expenses



General and administrative expenses consist primarily of salaries and related
benefits, including share-based compensation, related to our executive, finance,
legal, commercial and support functions. Other general and administrative
expenses include professional fees for auditing, tax, consulting and
patent-related services, rent and utilities and insurance.

General and administrative expenses for the year ended December 31, 2020 were
$83.4 million compared to $42.6 million for the same period in 2019. The
increase of $40.8 million is primarily due to an increase in share-based
compensation expense of $13.3 million, an increase in salaries and other
employee related expense of $12.8 million, an increase in professional services
expense of $11.2 million, and an increase in facilities, insurance and other
expense of $3.6 million. The increase in share-based compensation expense is due
to an increase in the fair value of equity awards granted and an increase in
headcount during the year ended December 31, 2020 compared to the same period in
2019. The increase in salaries and other employee related expense is primarily
due to an increase in the number of general and administrative employees during
the year ended December 31, 2020 compared to the same period in 2019, and is
largely driven by commercial readiness activities. The increase in professional
services expense is primarily due to an increase in commercial costs. The
increase in facilities, insurance and other expense is primarily driven by
increased software licensing costs and expensed equipment due to increased
headcount during the year ended December 31, 2020 compared to the same period in
2019, as well as increased director's and officer's liability insurance expense.

Other Income, Net



Other income, net for the year ended December 31, 2020 was $11.4 million
compared $8.8 million for the same period in 2019. The increase is primarily due
to the change in fair value on the long-term investment in ORIC Pharmaceuticals,
Inc., which was acquired in 2020 in connection with the ORIC License Agreement,
offset by a decrease in interest income primarily due to timing of scheduled
maturities.

Liquidity and Capital Resources



At December 31, 2020, we had $1.4 billion of cash, cash equivalents and
short-term investments compared to $415.1 million at December 31, 2019. During
2020, we completed public offerings of our common stock that generated total net
proceeds of $1.2 billion: in October 2020, we completed a public offering of our
common stock that generated net proceeds of $879.6 million and in January 2020,
we completed a public offering of our common stock that generated net proceeds
of $324.0 million. In July 2020, we entered into a sales agreement pursuant to
which we may, from time to time, sell shares of our common stock having an
aggregate offering price of up to $200.0 million; no shares have been sold in
connection with this sales agreement. In 2019, we completed public offerings of
our common stock that generated net proceeds of $327.8 million. Based on our
current and anticipated level of operations, we believe that our cash, cash
equivalents and short-term investments will be sufficient to meet our
anticipated obligations for at least one year from the date this Annual Report
on Form 10-K is filed with the SEC.

To date, we have funded our operations primarily through the sale of our common
stock, pre-funded warrants to purchase our common stock, and to a lesser extent
through up-front payments, research funding and milestone payments under
collaborative arrangements. Since inception, we have primarily devoted our
resources to funding research and development programs, including discovery
research, preclinical and clinical development activities. To fund future
operations, we will likely need to raise additional capital. The amount and
timing of future funding requirements will depend on many factors, including the
timing and results of our ongoing development efforts, the potential expansion
of our current development programs, potential new development programs and
related general and administrative support. We anticipate that we will seek to
fund our operations through public or private equity or debt financings or other
sources, such as potential collaboration
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agreements. We cannot make assurances that anticipated additional financing will
be available to us on favorable terms, or at all. Although we have previously
been successful in obtaining financing through our equity securities offerings,
there can be no assurance that we will be able to do so in the future. As a
result of the COVID-19 pandemic and actions taken to slow its spread, the global
credit and financial markets have experienced extreme volatility, including in
liquidity and credit availability, declines in consumer confidence, declines in
economic growth, increases in unemployment rates and uncertainty about economic
stability. There can be no assurance that deterioration in credit and financial
markets and confidence in economic conditions will not occur. If equity and
credit markets deteriorate, it may make any necessary debt or equity financing
more difficult to obtain, more costly and/or more dilutive.

Cash Flows for the Years Ended December 31, 2020 and 2019

The following table provides a summary of the net cash flow activity for each of the periods set forth below (in thousands):


                                                               Year Ended 

December 31,


                                                                2020        

2019


 Net cash used in operating activities                     $    (271,531)

$ (147,726)


 Net cash used in investing activities                          (139,857)   

(176,140)


 Net cash provided by financing activities                     1,250,714    

338,028

Increase in cash, cash equivalents, and restricted cash 839,326

14,162

Net cash used in operating activities



Net cash used for operating activities was $271.5 million and $147.7 million for
the years ended December 31, 2020 and 2019, respectively. Cash used in operating
activities during 2020 primarily related to our net loss of $357.9 million,
adjusted for non-cash share-based compensation expense of $85.8 million and net
cash inflows from a change in our operating assets and liabilities of $16.2
million. Cash used in operating activities during 2019 primarily related to our
net loss of $213.3 million, adjusted for non-cash share-based compensation
expense of $55.5 million and net cash inflows from a change in our operating
assets and liabilities of $13.2 million.

Net cash used in investing activities



Net cash used in investing activities for the years ended December 31, 2020 and
2019 was $139.9 million and $176.1 million, respectively, and reflects the
purchases of short-term investments and property and equipment, offset by sales
and maturities of short-term investments.

Net cash provided by financing activities



Net cash provided by financing activities for the year ended December 31, 2020
was $1.3 billion and consisted primarily of proceeds received from the issuance
of common stock, exercise of common stock options and stock issuances under the
employee stock option plan. Net cash provided by financing activities for the
year ended December 31, 2019 was $338.0 million and consisted of proceeds from
issuance of common stock, exercise of common stock options, and stock issuances
under the employee stock option plan.

Contractual Obligations and Commitments

The following table summarizes our contractual obligations and commitments as of December 31, 2020 that will affect our future liquidity (in thousands):



                                                                                                                               More than 5
                                        Total             Less than 1 year           1-3 years            3-5 years               years
Operating Lease Obligations(1)      $   94,184          $               -   

$ 9,525 $ 16,402 $ 68,257 Total contractual obligations $ 94,184 $

               -   

$ 9,525 $ 16,402 $ 68,257





(1) On June 30, 2020, the Company entered into an amended and restated lease
agreement (the "Amended and Restated Lease") for office and laboratory space
located in San Diego, California, for the Company's new corporate headquarters.
The Amended
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and Restated Lease supersedes in its entirety the original lease agreement for
the Company's future corporate headquarters dated as of August 22, 2019. The
Amended and Restated Lease term has a lease term of approximately 12 years. The
Company has an early termination right 7 years into the lease term, in which the
total contractual obligation would be reduced by $41.1 million.

We enter into contracts in the normal course of business with clinical sites for
the conduct of clinical trials, CROs for clinical research studies, professional
consultants for expert advice and other vendors for clinical supply
manufacturing or other services. These contracts generally provide for
termination on notice, and therefore are cancelable contracts and not included
in the table of contractual obligations and commitments.

Off-Balance Sheet Arrangements



During the years ended December 31, 2020 and 2019, we did not have any
off-balance sheet arrangements (as defined by applicable SEC regulations) that
are reasonably likely to have a current or future material effect on our
financial condition, results of operations, liquidity, capital expenditures or
capital resources.
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