Quarterlytics / Healthcare / Medical - Diagnostics & Research / Guardant Health

Guardant Health

gh · NASDAQ Healthcare
Claim this profile
Ticker gh
Exchange NASDAQ
Sector Healthcare
Industry Medical - Diagnostics & Research
Employees 501-1000
← All annual reports
FY2019 Annual Report · Guardant Health
Sign in to download
Loading PDF…
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549
_____________________
FORM 10-K
_____________________

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

For the fiscal year ended December 31, 2019

OR
☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from                        to                        

Commission File Number: 001-38683
_____________________

GUARDANT HEALTH, INC.

(Exact Name of Registrant as Specified in its Charter)
_____________________

Delaware
(State or other jurisdiction of
incorporation or organization)

45-4139254
(I.R.S. Employer
Identification No.)

505 Penobscot Dr.
Redwood City, California 94063
(Address of principal executive offices) (Zip Code)
Registrant’s telephone number, including area code: (855) 698-8887

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

Title of each class

Common Stock, par value $0.00001

Name of each exchange on which registered

The Nasdaq Global Select Market

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

None
___________________

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ☒  No  ☐
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange 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

Emerging growth company

☒

☐

☐

Accelerated Filer

Smaller reporting company

☐

☐

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

or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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

The  aggregate  market  value  of  the  voting  and  non‑voting  common  equity  held  by  non‑affiliates  of  the  registrant,  as  of  the  last  business  day  of  the
registrant’s most recently completed second fiscal quarter was approximately $3.4 billion  (based  on  the  closing  price  of  the  registrant’s  common  stock  on  the
Nasdaq Global Select Market on June 28, 2019 of $86.33 per share).

As of February 14, 2020, the registrant had 94,382,681 shares of common stock, $0.00001 par value per share, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement relating to its annual meeting of stockholders to be held in 2020 (the “2020 Annual Meeting”), to be filed
with the Securities and Exchange Commission (the “SEC”) within 120 days after the end of the fiscal year to which this Annual Report on Form 10-K relates, are
incorporated herein by reference where indicated. Except with respect to information specifically incorporated by reference in this Annual Report on Form 10-K,
such proxy statement is not deemed to be filed as part hereof.

 
 
GUARDANT HEALTH, INC.
FORM 10-K

For the Fiscal Year Ended December 31, 2019

TABLE OF CONTENTS

PART I

Item 1.

Item 1A.

Item 1B.

Item 2.

Item 3.

Item 4.

Business

Risk Factors

Unresolved Staff Comments

Properties

Legal Proceedings

Mine Safety Disclosures

PART II

Item 5.

Item 6.

Item 7.

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

Selected Financial Data

Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7A.

Quantitative and Qualitative Disclosures About Market Risk

Item 8.

Item 9.

Item 9A.

Item 9B.

Item 10.

Item 11.

Item 12.

Item 13.

Item 14.

Item 15.

Item 16.

Financial Statements and Supplementary Data

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Controls and Procedures

Other Information

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

PART IV

Exhibits, Financial Statement Schedules

Form 10-K Summary

Signatures

Page

1

35

80

80

80

80

80

81

83

102

103

149

149

150

152

152

152

152

152

152

155

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K, including the sections titled “Business” and “Management’s Discussion and Analysis of Financial Condition and Results of
Operations,” contains forward-looking statements regarding future events and our future results that are based on our current expectations, estimates, forecasts
and projections about our business, our results of operations, the industry in which we operate and the beliefs and assumptions of our management. Words such
as “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,” “would,” “could,” “should,” “intend” and “expect,” variations of these words, and similar
expressions are intended to identify forward-looking statements. These forward-looking statements are only predictions and are subject to risks, uncertainties and
assumptions that are difficult to predict. Therefore, actual results may differ materially and adversely from those expressed in any forward-looking statements.
Factors that might cause or contribute to such differences include, but are not limited to, those discussed in Part I, Item 1A,“Risk Factors,” of this Annual Report
on  Form  10-K  and  elsewhere  herein,  and  in  other  reports  we  file  with  the  U.S.  Securities  and  Exchange  Commission,  or  the  SEC.  While  forward-looking
statements are based on the reasonable expectations of our management at the time that they are made, you should not rely on them. We undertake no obligation
to revise or update publicly any forward-looking statements for any reason, whether as a result of new information, future events or otherwise, except as may be
required by law.

Each of the terms the “Company,” “we,” “our,” “us” and similar terms used herein refer collectively to Guardant Health, Inc., a Delaware corporation, and its
consolidated subsidiaries, unless otherwise stated. 

PART I

Item 1. Business

Overview

We are a leading precision oncology company focused on helping conquer cancer globally through use of our proprietary blood-based tests, vast data sets and
advanced analytics. We believe that the key to conquering cancer is unprecedented access to its molecular information throughout all stages of the disease, which
we intend to enable by a routine blood draw, or liquid biopsy. Our Guardant Health Oncology Platform is designed to leverage our capabilities in technology,
clinical  development,  regulatory  and  reimbursement  to  drive  commercial  adoption  of  our  tests,  improve  patient  clinical  outcomes,  lower  healthcare  costs  and
accelerate drug development. In pursuit of our goal to manage cancer across all stages of the disease, we have launched our Guardant360 and GuardantOMNI
tests for advanced stage cancer. Our Guardant360 test, launched in 2014, has been used by more than 7,000 oncologists, over 50 biopharmaceutical companies
and  all  28  National  Comprehensive  Cancer  Network,  or  NCCN,  Centers  in  the  United  States,  and  we  believe  it  is  the  world’s  market  leading  comprehensive
liquid biopsy test based on public disclosure of the number of comprehensive liquid biopsy tests sold in 2018. Our GuardantOMNI test, launched in 2017, has
been  used  by  our  biopharmaceutical  customers  as  a  comprehensive  genomic  profiling  tool  to  help  accelerate  clinical  development  programs  in  both  immuno-
oncology  and  targeted  therapy.  These  tests  fuel  development  of  our  LUNAR  program,  which  aims  to  address  the  needs  of  early  stage  cancer  patients  with
neoadjuvant and adjuvant treatment selection, cancer survivors with surveillance, and asymptomatic individuals eligible for cancer screening and individuals at a
higher risk for developing cancer with early detection. Our LUNAR-1 assay was launched in 2018 for research use and in late 2019 for investigational use.

Precision oncology, as it is practiced today, is primarily focused on matching cancer patients to personalized treatments based on the underlying molecular profile
of  their  tumors.  There  is  a  critical  need  to  expand  the  scope  of  precision  oncology  to  enable  precise  detection,  monitoring  and  selection  of  the  appropriate
intervention  as  early  in  the  disease  state  as  possible.  We  believe  a  major  challenge  to  achieving  this  is  the  limited  access  to  cancer’s  molecular  information.
Traditionally,  tissue  tests  that  require  physical  access  to  tumor  tissue  through  a  biopsy  or  surgery  have  been  used  to  gain  access  to  this  information.  A  tissue
biopsy or surgery procedure, however, is often invasive, time-consuming and costly, which limits the utility of tissue tests. Tissue tests are also not feasible for
certain applications such as screening for early detection of cancer.

Our liquid biopsy tests address many of the challenges of tissue biopsies. We believe our tests can expand the scope of precision oncology to earlier stages of the
disease, improve patient outcomes and lower healthcare costs. We estimate the market opportunity for our current commercial and pipeline products is over $35
billion in the United States, comprising applications for clinicians and biopharmaceutical customers to address early to late-stage disease, including:

1

Therapy  selection  in  advanced  stage  cancer  patients  -  We  are  pioneering  the  clinical  comprehensive  liquid  biopsy  market  with  our  Guardant360  and
GuardantOMNI  tests.  Based  on  SEER  Cancer  Registry  statistics  we  estimate  the  total  number  of  metastatic  cancer  patients  in  the  United  States  to  be
approximately 700,000. Using publicly available pricing for tissue-based therapy selection tests, and assuming patients are testing an average of two times over
the course of their disease, we estimate the potential market opportunity for therapy selection among these patients to be approximately $4 billion. Additionally,
based on the number of targeted therapy and immuno-oncology therapy programs in the current clinical pipeline, prevalence data, and typical pricing for our tests
when  used  by  our  biopharmaceutical  company  customers  in  connection  with  their  clinical  trials,  we  estimate  that  the  potential  market  opportunity  for  our
products in use by biopharmaceutical companies is approximately $2 billion. By combining these two, we estimate the aggregate market opportunity for therapy
selection in late-stage cancer patients to be approximately $6 billion. Our Guardant360 test is a molecular diagnostic test measuring 74 cancer-related genes and
our GuardantOMNI test has a broader 500-gene panel, both of which analyze circulating tumor DNA in blood. Our Guardant360 test has been used over 100,000
times by clinicians to help inform which therapy may be effective for advanced stage cancer patients with solid tumors. Our Guardant360 and GuardantOMNI
tests  are  used  by  biopharmaceutical  companies  for  a  range  of  applications,  including  identifying  target  patient  populations  to  accelerate  translational  science
research, clinical trial enrollment, and drug development, and post-approval commercialization.

Neoadjuvant and adjuvant treatment selection in early stage cancer patients and surveillance in cancer survivors -We are developing tests from our LUNAR
program  for  neoadjuvant  and  adjuvant  treatment  selection  in  early  stage  cancer  patients.  The  American  Cancer  Society  estimated  that  in  2016  there  were
approximately 15 million solid tumor cancer survivors. We believe this reflects a potential market opportunity of approximately $15 billion. For early stage solid
tumors,  neoadjuvant  and  adjuvant  treatment  may  be  given  as  a  first  step  in  care  to  shrink  the  tumor  or  adjuvantly  as  a  secondary  treatment  after  the  primary
treatment to reduce the risk of recurrence. However, not all early stage cancer patients may benefit from neoadjuvant and adjuvant treatment. For instance, based
on data published in 2007 from a randomized study of adjuvant chemotherapy versus observation in patients with colorectal cancer, the use of adjuvant treatment
showed  significant  benefit  for  a  subgroup  of  the  patients  who  meet  certain  clinical  criteria,  but  only  marginal  benefit  for  the  patients  who  do  not  meet  these
criteria. We are currently investigating our LUNAR-1 assay’s ability to determine if the presence of ctDNA in early stage cancer could more accurately identify
patients who may benefit from neoadjuvant and adjuvant treatment. We are also developing tests from our LUNAR program for minimal residual disease and
recurrence detection in cancer survivors. Our LUNAR-1 assay leverages data and learnings from our Guardant360 and GuardantOMNI tests and is designed to
enable clinicians to detect minimal residual disease and to detect cancer recurrence at a stage when intervention may have a higher chance of success. We believe
our  LUNAR-1  assay  may  also  help  biopharmaceutical  companies  identify  new  drug  development  opportunities.  In  return,  these  relationships  could  help  us
establish clinical utility for our tests and create new testing opportunities related to emerging therapies.

Early detection of cancer in asymptomatic individuals eligible for cancer screening and individuals at a higher risk for developing cancer - We are developing
screening tests from our LUNAR program for individuals who are eligible for colorectal cancer screening annually based on the U.S. Preventive Services Task
Force, or USPTF, guidelines for colorectal cancer screening. Recent data reported at the 2019 National Colorectal Cancer Roundtable, shows that amongst this
population, approximately 31% are not up to date with the recommended colorectal cancer screening. Therefore, we believe there is a significant unmet need for
non-invasive modalities such as our LUNAR-2 assay that, if successfully developed, we believe could increase compliance with the USPTF guidelines. Based on
an estimated 30 million individuals who are eligible for colorectal cancer screening, we believe this represents a potential market opportunity of approximately
$15  billion.  We  are  also  pursuing  the  development  of  screening  tests  from  our  LUNAR  program  for  individuals  at  a  higher  risk  of  developing  cancer  due  to
multiple  factors,  including  moderate  to  heavy  smoking,  hereditary  risk  and  pre-existing  infections  and/or  inflammatory  conditions. Based  on  various  industry
sources, we estimate there are approximately 35 million individuals that satisfy one of three criteria for being susceptible to high risk cancer. We believe this
represents  a  potential  market  opportunity  of  approximately  $18  billion.  We  believe  that  developing  a  blood  test  for  early  detection  of  cancer  requires  a  vast
amount of molecular and clinical data across all stages of the disease in order to better understand the biology and clinical relevance of tumor-specific biomarkers
in blood. We further believe that we can accelerate the collection of this data pool and the development of our LUNAR-2 assay for an early detection test in a
capital-efficient  manner  by  developing  and  commercializing  our  Guardant360  test,  GuardantOMNI  test  and  LUNAR-1  assay,  while  we  are  using  our
development-stage LUNAR-2 assay in exploratory studies. While we believe the benefits of early detection on clinical outcomes are widely known, early cancer
or precancerous detection may also benefit biopharmaceutical companies by identifying a much larger at-risk population who may benefit from early therapeutic
intervention or from preventative medicines.

2

We believe that best-in-class technology is required to address these market opportunities, but is only one of many strengths required to create a market leading
liquid biopsy platform. We believe our Guardant Health Oncology Platform has developed strengths across five critical layers, each of which facilitates success in
the adjacent layers, and together the five layers form a barrier to entry and provide us a competitive advantage and a platform we can efficiently leverage across
multiple products. These five layers include:

Technology  -  Our  proprietary  Guardant  Health  Digital  Sequencing  Technology  combines  cutting  edge  capabilities  from  multiple  disciplines  including
biochemistry,  next-generation  sequencing,  signal  processing,  bioinformatics,  machine  learning  and  process  engineering  to  enable  what  we  believe  to  be  the
world’s market leading comprehensive liquid biopsy test with a typical turnaround time of less than seven days after we receive the sample and enable our high
performing liquid biopsy tests intended for different market segments. Furthermore, our machine learning capability enables performance improvement as we
incorporate additional data.

Clinical utility - We believe that success in the clinical utility layer requires both independent investments in clinical research and strategic relationships with
market-leading biopharmaceutical companies. We have invested heavily in clinical studies, including more than 50 clinical outcomes studies demonstrating that
overall  biomarker  detection  rates  of  our  non-invasive  blood  testing  were  in  line  with  standard  of  care  tissue  testing.  Our  clinical  research  collaborations  have
resulted in more than 150 peer-reviewed publications. We also have relationships with over 50 biopharmaceutical customers that have provided rigorous clinical
validation of our technology and early insights into test opportunities for emerging therapeutics.

Regulatory  approval  -  We  believe  Guardant360  test  was  the  first  comprehensive  liquid  biopsy  approved  by  the  New  York  State  Department  of  Health,  or
NYSDOH.  In  addition,  based  on  our  review  of  publicly  available  records,  we  believe  our  facility  was  the  first  comprehensive  liquid  biopsy  laboratory  to  be
certified  pursuant  to  the  Clinical  Laboratory  Improvement  Amendments  of  1988,  or  CLIA,  accredited  by  the  College  of  American  Pathologists,  or  CAP,  and
NYSDOH-permitted.  Our  Guardant360  and  GuardantOMNI  tests  have  each  been  designated  by  the  U.S.  Food  and  Drug  Administration,  or  the  FDA,  as  a
breakthrough device for use as a companion diagnostic in connection with certain specified therapeutic products of our biopharmaceutical customers. Among
other  things,  designation  as  a  breakthrough  device  provides  for  priority  review  by  the  FDA  and  more  interactive  communication  with  the  FDA  during  the
development process. In the fourth quarter of 2019, we submitted a premarket approval, or PMA, application to seek the FDA’s approval of our Guardant360 test
to  be  used  as  a  companion  diagnostic,  initially  in  connection  with  one  therapeutic  product  of  a  biopharmaceutical  customer,  and  to  provide  tumor  mutation
profiling for cancer patients with solid tumors. In February 2020, we submitted an additional module of the PMA application for our Guardant360 test to the
FDA. We believe that FDA approval will become increasingly important for diagnostic tests to gain commercial adoption both in the United States and abroad.

3

Payer coverage and reimbursement - The analytical and clinical data that we have generated in our efforts to establish clinical utility, combined with the support
we have developed with key opinion leaders, or KOLs, in the oncology space have led to positive coverage decisions by a number of commercial payers. Our
Guardant360  test  is  currently  covered  by  Cigna,  Priority  Health,  multiple  regional  Blue  Cross  Blue  Shield  plans  as  well  as  the  health  plans  associated  with
eviCore  for  non-small  cell  lung  cancer,  or  NSCLC,  which  we  believe  gives  us  a  competitive  advantage  with  these  payers  with  respect  to  NSCLC  patients.
Payment  from  commercial  payers  differs  depending  on  whether  we  have  entered  into  a  contract  with  the  payers  as  a  “participating  provider.”  Payers  often
reimburse non-participating providers, if at all, at a lower amount than participating providers. When we are not contracted with these payers, they determine the
amount they are willing to reimburse us for tests. When we contract with a payer to serve as a participating provider, reimbursements by the payer are generally
made pursuant to a negotiated fee schedule and are limited to only covered indications or where prior approval has been obtained.

With respect to Medicare, in July 2018, Palmetto GBA, the Medicare Administrative Contractor, or MAC, responsible for administering Medicare’s Molecular
Diagnostic Services Program, or MolDx, issued a local coverage determination, or LCD, for our Guardant360 test with respect to NSCLC patients who meet
certain  clinical  criteria.  Shortly  thereafter  in  2018,  Noridian  Healthcare  Solutions,  the  MAC  responsible  for  adjudicating  claims  in  California,  where  our
laboratory is located, and a participant in MolDx, finalized an equivalent LCD for our Guardant360 test. Pursuant to this Noridian LCD, in September 2018, we
began to submit claims for reimbursement for Guardant360 clinical testing performed for NSCLC patients covered under such LCD who meet certain clinical
criteria,  and  in  October  2018,  we  began  to  receive  payments  for  these  services  from  Medicare.  In  December  2019,  replacing  its  prior  NSCLC  patient  LCD,
Palmetto GBA finalized a new LCD for our Guardant360 test that provides limited Medicare coverage for the Guardant360 test in patients diagnosed with solid
cancers of non-central nervous system origin. The new LCD covers our Guardant360 test for fee-for-service Medicare patients with advanced cancers who meet
its clinical criteria for complete genomic profiling with next-generation sequencing, or NGS, of tumor tissue to optimize treatment selection decisions but have
insufficient or unavailable tissue for molecular profiling. The expanded coverage decision is in line with FDA approvals of several tumor-agnostic drugs that are
based on a single genomic biomarker across all cancers or that are targetable across multiple cancer types. We expect Noridian Healthcare Solutions to issue a
new LCD for our Guardant360 test equivalent to the new LCD issued by Palmetto GBA, though the timing and scope of the Noridian LCD are uncertain.

We anticipate approval by the FDA, if obtained, may support further improvements in coverage and reimbursement for our Guardant360 test. We estimate total
current  coverage  in  the  United  States  for  the  Guardant360  test  to  be  more  than  170  million  lives,  including  Medicare  beneficiaries  and  members  of  several
commercial health plans.

Commercial adoption - Success in each of the layers above is important for commercial adoption of our tests by clinicians and biopharmaceutical companies.
Additionally, for clinicians, endorsement by KOLs, utilization by academic centers and inclusion in national treatment guidelines are important, especially for
adoption in the local community setting where 80% of cancer treatment occurs. Our relationships with key stakeholders across the oncology space, clinical data
we  believe  to  support  use  of  Guardant360  test  ahead  of  tissue  based  testing,  as  well  as  the  inclusion  of  liquid  biopsy  as  a  potential  alternative  under  certain
circumstances  to  tissue  biopsy  in  NCCN  guidelines,  have  helped  facilitate  the  use  of  our  tests  by  7,000  oncologists,  who  have  collectively  ordered  our
Guardant360 test over 100,000 times, and over 50 biopharmaceutical companies. We sold 49,926 tests to clinical customers in the year ended December 31, 2019,
an increase from 29,238 and 25,626 in the year ended December 31, 2018 and 2017, respectively. We sold 20,643 tests to biopharmaceutical customers in the
year ended December 31, 2019, an increase from 10,370 and 6,286 in the year ended December 31, 2018 and 2017, respectively.

In the United States, we market our tests to clinical customers through our targeted sales organization, which is engaged in sales efforts and promotional activities
primarily to oncologists and cancer centers. Outside the United States, we market our tests to clinical customers through distributors and direct contracts with
healthcare institutions. We market our tests to biopharmaceutical customers globally through our business development team, which promotes the broad utility of
our tests for drug development and commercialization. Additionally, we have established a joint venture with SoftBank to accelerate commercialization of our
products including in Asia, the Middle East and Africa, with our initial focus being on Japan. Our products are currently marketed in approximately 40 countries.

We  generated  total  revenue  of  $214.4 million  in  the  years  ended  December  31,  2019,  an  increase  from  $90.6  million  and  $49.8  million  in  the  years  ended
December 31, 2018 and 2017, respectively. We also incurred net losses of $67.9 million, $84.3 million and $83.2 million in the years ended December 31, 2019,
2018 and 2017, respectively.

4

Summary of our product portfolio

Our  product  portfolio  is  built  upon  the  same  principle  as  our  platform,  in  that  success  with  each  facilitates  success  for  the  next.  Data  and  learnings  from  our
Guardant360 test have benefited us in developing our GuardantOMNI test, both of which fuel development of our LUNAR program.

The table below illustrates our current products and development programs:

Our strategy

Our objective is to be the leading provider of precision oncology products for cancer management across all stages of the disease and drive commercial adoption
of our products. To achieve this, we intend to:

•

Increase awareness of our products by:

•

•

•

•

building awareness of liquid biopsy and pioneering a blood-first paradigm for genotyping cancer patients;

educating biopharmaceutical companies, KOLs and advocacy groups;

advocating for inclusion of our tests in treatment guidelines; and

expanding access to our products globally through direct investment and by leveraging our global network of partners.

•

Expand clinical utility and increase reimbursement for our products by:

•

•

working with private and public payers to establish coverage and reimbursement for our tests;

investing in clinical evidence directly and through relationships with academia and biopharmaceutical companies to establish expanded indications for
use;

5

•

•

demonstrating improved clinical utility and health economics from use of our tests to patients, physicians and payers; and

pursuing FDA approval of our tests to facilitate reimbursement and global market access.

•

Strengthen our relationships with biopharmaceutical and academia customers by:

•

•

•

demonstrating the utility of our products in connection with standard of care biopharmaceutical treatments thereby encouraging clinical adoption;

developing and seeking approval of our products as companion diagnostics for targeted therapies and immuno-oncology therapies; and

providing earlier insights into emerging clinically relevant biomarkers.

•

Leverage our Guardant Health Oncology Platform to expand our product portfolio by:

•

•

•

•

•

using our commercial engine as a force multiplier of returns on research and development investment to generate data and analytical insights to enable
development of new products;

taking  a  disciplined  and  systematic  approach  to  product  and  market  development,  by  starting  with  therapy  selection  and  then  expanding  sequentially
towards early cancer detection;

utilizing our data, sample biobank and insights into biology of circulating tumor-related biomarkers in blood to develop our LUNAR program;

building on our regulatory and commercial infrastructure to accelerate new product launches and drive commercial efficiencies; and

using our strategic relationships, including our joint venture with SoftBank, to drive global commercialization of our products, with a near-term focus on
Japan.

Our industry

Despite enormous investment in research and the introduction of new treatments, cancer remains a critical area of unmet medical need. According to the Centers
for Disease Control and Prevention, or CDC, cancer is the second leading cause of death in the United States, exceeded only by heart disease. The American
Cancer Society reported that in 2016 there were more than 15.5 million Americans with a history of cancer and that approximately 1.7 million new cancer cases
would be diagnosed in 2018. Furthermore, approximately 600,000 Americans were expected to die of cancer in 2019. The International Agency for Research on
Cancer predicted that the annual global burden of cancer would reach 22 million new cases and 13 million cancer deaths by 2030. The World Health Organization
estimated that the total annual economic cost of cancer in 2010 was approximately $1.2 trillion.

The promise of precision oncology

Traditionally, cancer has been classified by the specific organ in which it is located and treated independently of its molecular profile. However, cancer treatment
is seeing a significant shift towards precision oncology, the practice of which seeks to match patients to personalized, targeted therapies based on the specific
molecular  profile  of  their  tumors.  Major  cancer  types,  including  lung,  breast,  colorectal  and  melanoma,  for  example,  have  become  increasingly  classified  and
treated on the basis of molecular profile.

Discovery of new molecular biomarkers continues to result in further sub-classification of cancer patient populations, which increases complexity of diagnosing
and treating the disease for clinicians. This has led to increasing clinical utility and adoption of comprehensive genomic profiling, or CGP. Unlike tests that focus
on  a  single  or  limited  set  of  biomarkers,  commonly  referred  to  as  hotspot  testing,  CGP  provides  a  more  comprehensive  view  of  the  tumor’s  molecular
information. Specifically, a comprehensive genomic test must be able to identify all four classes of genetic alterations, namely single nucleotide variants, copy
number  variants,  insertions/deletions  and  fusions,  across  multiple  genes.  The  NCCN  treatment  guidelines  now  support  multi-biomarker  testing  across  several
cancer types, which has led to increased adoption of CGP. For example, for NSCLC, NCCN treatment guidelines now include recommendations for testing across
nine genes, as well as tumor mutational burden, or TMB, each associated with targeted therapies that are either FDA-approved or in late-stage development.

6

While  precision  oncology  is  improving  clinical  outcomes  for  patients  across  many  cancer  types,  it  is  also  benefiting  oncology  drug  development.
Biopharmaceutical companies are able to increase chances of a drug’s success in clinical trials by identifying and selecting patients whose cancer has the right
molecular  profile.  This  enables  them  to  potentially  require  fewer  patients  for  the  trial  and  shorten  the  duration  of  late-stage  clinical  trials.  According  to
GlobalData, approximately 66% of the solid tumor oncology clinical pipeline in 2018 was for targeted therapies and immuno-oncology therapy agents, many of
which are targeting a cancer with a specific molecular profile or biomarker.

Despite improvements to clinical outcomes and oncology drug development, primarily in the advanced cancer setting, precision oncology has not significantly
impacted earlier stage cancer care. For example, precision oncology has yet to fully impact neoadjuvant and adjuvant treatment management, minimal residual
disease and recurrence detection in cancer survivors, or early cancer detection in screening eligible asymptomatic individuals and higher risk individuals. Many
early  stage  cancer  patients  receive  only  non-targeted  chemotherapy  post-surgical  resection  of  the  tumor  in  the  adjuvant  setting  and  ad-hoc,  symptomatic
monitoring for recurrence. For early detection of cancer in screening eligible asymptomatic individuals, the current standard of care is comprised of single protein
biomarker tests or radiographic imaging, which can have challenges with high false positive rates when used for screening. For example, according to the results
from the national lung screening trial reported in The New England Journal of Medicine in November 2011, low-dose CT, or LDCT, imaging may identify lung
nodules  in  heavy  smokers,  out  of  which  95%  are  benign.  Furthermore,  these  tests  are  generally  only  applicable  to  specific  cancers  and  incapable  of  broad
screening for multi-cancer detection.

Limitations of tissue biopsies

We believe that precision oncology, as it is practiced currently, suffers from the major challenge of limited access to molecular information, largely resulting from
a reliance on tissue biopsies. This has impeded progress on both early disease diagnosis and effective treatment selection. For a tissue biopsy to be performed, the
patient typically must undergo an imaging procedure to locate the tumor, following which a biopsy of the tumor is taken using interventional procedures, such as
a core needle biopsy or fine needle aspiration. As part of this procedure, the needle is placed into the tumor and cells are aspirated into a syringe. The cells are
placed on a microscope slide, stained and examined by a pathologist to determine the diagnosis and classification of the disease. If genotyping is required, which
could include testing with next-generation sequencing, additional slides with tumor tissue would need to be prepared for this analysis.

The tissue biopsy process holds significant challenges, including:

Adverse  event  risks  -  Tissue  biopsies  require  use  of  an  invasive  tool  to  access  the  tumor  within  the  body  and  are  frequently  associated  with  morbidity  and
mortality. For instance, a study published in The Journal of Oncology Practice / Clinical Lung Cancer in March 2016 reported that, according to Medicare claims
data from 2009 to 2011, a lung biopsy was associated with a 19.3% complication rate. Complications included pneumothorax, respiratory failure and hemorrhage.

Delay  in  care  -  Collection  of  tissue  biopsy  often  requires  a  medical  imaging  procedure  to  locate  the  cancer  and  coordination  amongst  an  interventional
radiologist, surgical oncologist and pathologist to interpret the imaging and collect and analyze the tissue. A traditional tissue biopsy can take several weeks to
schedule and additional time to process the sample, which can be burdensome on the patient and delay the collection of critical molecular information.

Cost - According to a study published in The Journal of Oncology Practice / Clinical Lung Cancer in  March  2016,  the  average  total  cost  of  a  lung  biopsy  is
$14,670, due largely to the required imaging, biopsy or surgical procedure to obtain the tissue, and associated morbidity.

Limited tissue availability - Tissue sampling has variable but significant failure rates due to procedural or sampling failure and may be exhausted by pathology
tests for cancer diagnosis. In NSCLC, this has been documented across many institutions and happens as often as 60% of the time. In addition, tissue sampling is
unavailable for a minority of patients due to medical contraindication, patient unwillingness or logistical concerns.

Limited to a small portion of a single tumor - A tissue biopsy is often limited to a small portion of a single tumor site, which may not accurately represent the
entire tumor or all clinically relevant biomarkers due to tumor heterogeneity. This could lead to tissue biopsy missing mutations targetable by therapy for patients
with advanced solid tumors. This limitation has been demonstrated in many tumor types, including lung, breast, gastric, renal and cholangiocarcinoma.

Inability  to  address  applications  for  early  stage  cancer  patients  -  For  disease  recurrence  detection  or  screening  for  early  detection  of  cancer,  tissue  tests  are
impractical or not feasible.

7

The potential for our liquid biopsy technology

We believe that our liquid biopsy technology can liberate molecular information across all stages of cancer and broaden the scope of precision oncology to earlier
stages  of  the  disease.  Furthermore,  we  believe  our  liquid  biopsy  can  potentially  lead  to  dramatically  greater  rates  of  data  generation  and  shorten  cycles  of
learning, thereby accelerating progress in improving clinical outcomes. Relative to a tissue biopsy, a routine blood draw is:

• minimally invasive;

•

•

•

rapidly administered;

cost effective; and

readily available.

In addition, we believe our liquid biopsy technology is:

Able  to  provide  timely  insight  into  tumor  genomic  alterations  -  Our  liquid  biopsy  tests  are  convenient  and  fast.  With  a  routine  blood  draw,  and  for  example,
typically  seven  days  or  less  turn-around-time  with  our  Guardant360  test,  we  believe  our  Guardant  Health  Oncology  Platform  can  comprehensively  genotype
cancer patients and other populations to enable rapid initiation of effective treatment and potential clinical trial enrollment.

More representative of the molecular profile of the tumor in its entirety - Our test results could represent an overall summary of the entire molecular profile of the
tumor  or  tumors  and  not  just  a  subset  of  a  single  tumor  that  may  be  represented  in  a  tissue  sample.  This  may  enable  insight  into  potentially  more  targetable
mutations than tissue testing.

Able  to  monitor  response  to  therapy  –  We  believe  recent  data  suggests  that  changes  in  tumor  burden  can  be  monitored  through  the  use  of  our  liquid  biopsy
technology and successive blood draws to potentially provide quicker information as to the effectiveness of a chosen treatment than current approaches using
radiographic imaging.

Able to address all stages of the disease – We believe ready access to molecular information and the ability to potentially detect cancer at early stages in blood
enable  our  liquid  biopsy  technology  to  be  used  for  applications,  such  as  for  minimal  residual  disease  and  recurrence  detection  or  early  cancer  detection  in
screening eligible asymptomatic individuals and higher risk individuals.

Able  to  match  standard-of-care  tissue  testing  –  In  a  recent  head-to-head  comparison  of  Guardant360  test  to  standard-of-care  tissue  testing  for  biomarker
identification in first-line advanced NSCLC patients, our liquid biopsy technology produced biomarker detection rates in line with standard of care tissue testing.

History of liquid biopsy and challenges

The concept of a liquid biopsy is not new, and we believe that a minimally invasive tool, such as a liquid biopsy, has been an aspiration of the oncology field for
many decades. Multiple modalities have been pursued to access a patient’s molecular information through blood, including ctDNA, circulating tumor cells, or
CTCs, and exosomes. It has been shown that modalities using ctDNA may have distinct advantages over other known modalities. For example, ctDNA has a
concentration in blood that may be over 100 times higher than CTCs, which can enable increased test sensitivity and accuracy.

However, despite this promise of higher concentration and, therefore, higher theoretical sensitivity of a ctDNA test, these fragments are still found at very low
concentrations which can make their analysis challenging by conventional methods. For example, circulating cell-free fetal DNA, which is the target for a variety
of non-invasive prenatal testing applications for women during pregnancy, makes up a median of 10% of the total cell-free DNA in maternal blood. By contrast,
the median concentration of ctDNA genomic alterations detected by us in blood of advanced cancer patients is 0.46% and can be present at levels below 0.01% in
early stage cancer patients.

Although  the  sensitivity  and  specificity  of  conventional  next-generation  sequencing  is  sufficient  for  tissue  biopsy  based  tumor  profiling,  this  performance  is
inadequate  for  liquid  biopsies  due  to  the  low  concentrations  of  ctDNA  in  blood.  Moreover,  comprehensive  genomic  profiling  for  precision  oncology  requires
detection across all four classes of genomic alterations below, which can be especially challenging with ctDNA:

Single-nucleotide variants (SNVs) - variation(s) in a single nucleotide in a DNA molecule

Insertions/deletions (Indels) - short nucleotide section(s) of a DNA molecule inserted or deleted

Copy number amplifications (CNVs) - regions(s), typically spanning one or more genes of the genome that are repeated

8

Genomic rearrangements - involve gross alterations of chromosomes or large chromosomal regions and can take the form of deletions, duplications, insertions,
inversions or translocations.

The market opportunity and our vision for the standard of cancer care

We believe that liquid biopsy tests can solve critical challenges of tissue-based tests, expand the scope of precision oncology across the cancer care continuum to
earlier  stage  disease,  and  empower  clinicians  to  make  better  decisions  to  improve  clinical  outcomes,  lower  healthcare  costs  and  enable  biopharmaceutical
companies to advance new therapies. We believe liquid biopsy has application in the following areas, representing a market opportunity we estimate to be more
than $50 billion in the United States:

Therapy  selection  in  advanced  cancers.  Clinicians  require  genomic  information  in  order  to  properly  match  advanced  cancer  patients  with  the  appropriate
treatment across multiple lines of therapy. Given the limitations of tissue biopsies, we believe a blood test that is capable of accessing the comprehensive genomic
profile  of  the  patient’s  cancer  represents  a  significant  breakthrough,  especially  in  the  local  community  setting,  where  80%  of  cancer  patients  are  treated,
infrastructure  and  expertise  to  access  tissue  may  be  especially  limited.  We  also  believe  a  comprehensive  liquid  biopsy  test  for  therapy  selection  can  benefit
biopharmaceutical companies across a range of applications, including patient selection and recruitment for clinical trials and commercialization once the drug is
approved, as well as identification of new molecular targets for drug development. For example, better access to molecular information can speed clinical trial
enrollment and increase the probability of success of drug development in a target patient population.

We estimate this is an up to $6 billion total market opportunity in the clinical and biopharmaceutical markets. This includes a near-term clinical opportunity of $2
billion, based on an estimated 700,000 metastatic patients in the United States and an assumed average reimbursement rate of $3,000, a similar amount covered
by  Medicare  for  a  comprehensive  genomic  profiling  test.  We  estimate  the  number  of  metastatic  patients  in  the  United  States  based  on  the  number  of  deaths
attributable to cancer annually in the United States as reported in A Cancer Journal for Clinicians and the number of patients who are diagnosed with advanced
cancer in the United States and are alive a year after diagnosis as reported in the SEER Cancer Registry. We believe this opportunity may expand by up to an
additional $2 billion, as metastatic patients may require multiple tests to inform subsequent lines of therapy.

We estimate that the market opportunity with biopharmaceutical companies in the United States is over $2 billion including an opportunity of over 400,000 tests
based on the industry’s current clinical pipeline of over 1,200 immuno-oncology and over 450 targeted therapy programs, involving more than 130,000 patients.
These  programs  represent  two  distinct  testing  opportunities:  (1)  prospective  screening  to  identify  candidate  patients  for  clinical  trial  enrollment  and  (2)
retrospective analysis of patient samples. In addition, we estimate there is a market opportunity of $500 million in companion diagnostics development and other
commercial opportunities.

The chart below represents the breakdown of the total estimated market opportunity across both the targeted therapy and immuno-oncology opportunities for the
therapy selection markets:

9

Neoadjuvant and adjuvant treatment in early stage cancer patients and surveillance in cancer survivors. We believe early stage cancer patients would benefit
from  tests  that  could  more  accurately  identify  patients  to  benefit  from  adjuvant  treatment.  A  liquid  biopsy  test  in  this  setting  could  help  biopharmaceutical
companies identify new opportunities in adjuvant drug development and therapies targeting earlier stage cancers. In addition, we believe cancer survivors would
benefit from tests that could improve minimal residual disease and recurrence detection. Follow-up testing for surveillance in cancer survivors is often ad-hoc,
leaving patients guessing as to if and when their cancer may recur. A portion of this market is currently served by prognostic and predictive molecular tests that
can  classify  whether  a  patient  may  be  at  low-risk  or  high-risk  of  recurrence.  We  believe  that  a  definitive  diagnostic  test  for  cancer  would  benefit  this  patient
population both immediately following surgical resection of the tumor and as a monitoring tool in subsequent years. We estimate this is an approximately $15
billion market opportunity, based on an estimated 15 million solid tumor cancer survivors as of 2016, excluding survivors of blood cancers, including leukemia
and Non-Hodgkin’s lymphoma, in the United States as reported by the American Cancer Society, and assuming an average price of $1,000 per test for each solid
tumor cancer survivor, which is consistent with the cost to screen a patient for lung cancer as reported in the New England Journal of Medicine in November
2011.

Early detection of cancer.  Earlier  detection  of  cancer  is  generally  correlated  with  better  clinical  outcomes  and  a  higher  cure  rate  for  many  cancer  types.  We
believe  that  a  test  that  can  accurately  detect  cancer  at  its  earliest  stages  or  even  pre-cancer  in  a  largely  asymptomatic  population  will  need  to  overcome  high
technological, clinical and regulatory challenges. However, such a test can have significant benefits on mortality and perhaps eventually reduce incidence rates of
cancer, if the information provided can be effectively paired with the right preventative medicine or curative intervention. We believe this represents a potential
market opportunity of approximately $15 billion for non-invasive modalities such as our LUNAR-2 assay that is under development, based on an estimated 30
million individuals who are eligible for colorectal cancer screening. In addition, we estimate this is an approximately $18 billion market opportunity with respect
to individuals at a higher risk of developing cancer, based on an estimated 35 million individuals at higher risk for cancer in the United States and assuming an
average price of $500 per test. The estimated 35 million individuals at higher risk for cancer in the United States consist of approximately 17 million individuals
at moderate to high hereditary risk of developing breast, ovarian, colorectal, endometrial or prostate cancer, based on prevalence statistics reported in Genetics in
Medicine and U.S. Census Data; approximately 14.5 million people over the age of 50 who are moderate to heavy smokers, as reported by the Centers for Disease
Control and Prevention; and approximately 3.5 million individuals in the United States at high risk of developing liver cancer due to Hepatitis C infection, based
on the 2003-2010 data reported in Hepatology in 2015.

10

The graphic below depicts the potential opportunities of liquid biopsy across the cancer continuum of care:

11

The Guardant Health Oncology Platform

The Guardant Health Oncology Platform is comprised of strengths across five critical layers, each of which is tightly coupled with the others, and we believe
success in each facilitates success in adjacent layers. We believe our platform and our position as a pioneer of comprehensive liquid biopsy provide us with a
competitive advantage and form a barrier to entry. The following diagram depicts the five layers of our oncology platform:

Technology – Guardant Health Digital Sequencing

Guardant Health Digital Sequencing combines state-of-the-art technology from multiple disciplines and is enabled by robust, high-efficiency biochemistry at the
front-end, next-generation sequencing and a machine learning augmented bioinformatics pipeline. The combination of all of these technologies onto one platform
has enabled our programs in liquid biopsy and what we believe is the highest performing clinical comprehensive liquid biopsy, with a turnaround time of typically
less than seven days after we receive the sample. We believe our platform is able to detect all four classes of genomic alterations and microsatellite instability, or
MSI, at sensitivity levels beyond comparable platforms.

Two specific enhancements we employ throughout the workflow include:

High-efficiency chemistry - Our proprietary ctDNA sample preparation biochemistry is able to convert the vast majority of extracted ctDNA molecules into a
sequencing  library.  This  enables  enhanced  sensitivity  to  detect  mutations  present  at  ultra-low  variant  frequency  and  the  ability  to  work  with  limited  sample
volumes.

Error suppression via proprietary bioinformatics engine - Our bioinformatics pipeline reduces the sequencing error rate by 1000-fold over conventional next-
generation sequencing and by 30-fold over other sequencing assays relying on molecular barcoding alone. Furthermore, the machine learning capability enables
performance improvement as we incorporate data from additional blood samples.

12

Clinical utility

We believe that the measure of the clinical utility provided by a given diagnostic test or technology lies in the ability to enable the physician to match intervention
with the patient to select the treatment likely to produce a more favorable outcome for the patient. We also believe that success in the clinical utility layer requires
both independent, systematic investments in clinical research, and strategic relationships with market-leading biopharmaceutical companies. We aim to generate
publications  in  independently  peer-reviewed  scientific  journals  to  demonstrate  clinical  utility  of  our  technology.  For  this  reason,  we  have  invested  in  directly
sponsoring or participating in prospective, interventional clinical trials with leading academic cancer centers and biopharmaceutical companies, including over
three dozen published clinical outcomes studies demonstrating that overall biomarker detection rates of our non-invasive blood testing were in line with tissue
testing. We have built an internal clinical development team that can efficiently run clinical utility studies and continue to invest in such studies spanning many
indications within the advanced cancer setting, including completed outcomes studies (27 in lung cancer, 15 in gastrointestinal cancers, 5 in breast cancer and 10
in other cancer types). We are also investing heavily in studies involving earlier stage disease.

The strength of our technology facilitates strategic relationships with academia and over 50 biopharmaceutical companies, to help them advance the development
of their drug pipelines and expand the utilization of currently commercialized treatments. In return, these relationships provide rigorous clinical validation of our
technology and early insights into emerging therapeutically relevant test targets.

Regulatory approval

We believe that Guardant360 test was the first comprehensive liquid biopsy approved by the NYSDOH. In addition, based on our review of publicly available
records, we believe our facility was the first comprehensive liquid biopsy laboratory to become CLIA-certified, CAP-accredited and NYSDOH-permitted. Our
Guardant360 and GuardantOMNI tests have each been designated by the FDA as a breakthrough device for use as a companion diagnostic in connection with
certain specified therapeutic products of our biopharmaceutical customers. Among other things, designation as a breakthrough device provides for priority review
by the FDA and more interactive communication with the FDA during the development process. In the fourth quarter of 2019, we submitted a PMA application
to  seek  the  FDA’s  approval  of  our  Guardant360  test  to  be  used  as  a  companion  diagnostic,  initially  in  connection  with  one  therapeutic  product  of  a
biopharmaceutical customer, and to provide tumor mutation profiling for cancer patients with solid tumors. In February 2020, we submitted an additional module
of the PMA application for our Guardant360 test to the FDA. Medicare’s National Coverage Determination, or NCD, for Next Generation Sequencing, or NGS,
was established in 2018 and subsequently updated in 2020. The NCD provides coverage for molecular diagnostic tests such as our Guardant360 test, if, among
other criteria, such tests are offered within their FDA-approved companion diagnostic labeling. We believe that this establishes a competitive advantage for tests
receiving FDA approval and that FDA approval will be increasingly necessary for diagnostic tests to gain adoption, both in the United States and abroad, by
clinicians, payers and biopharmaceutical companies.

Payer coverage

Coverage from public and commercial payers is primarily influenced by clinical evidence, endorsement by KOLs and treatment guidelines. The analytical and
clinical  data  that  we  have  generated,  combined  with  our  support  from  KOLs,  has  led  to  a  number  of  positive  coverage  decisions  from  commercial  payers.
Guardant360  test  is  currently  covered  by  Cigna,  Priority  Health,  multiple  regional  Blue  Cross  Blue  Shield  plans  as  well  as  the  health  plans  associated  with
eviCore for NSCLC, which we believe gives us a competitive advantage with these payers. With respect to Medicare, in July 2018, Palmetto GBA, the MAC
responsible for administering MolDx, issued an LCD for our Guardant360 test with respect to NSCLC patients who meet certain clinical criteria. Subsequently in
2018, Noridian Healthcare Solutions, the MAC responsible for adjudicating claims in California, where our laboratory is located, and a participant in MolDx,
finalized an equivalent LCD for our Guardant360 test, and we have been billing Medicare pursuant to this Noridian LCD. In December 2019, replacing its prior
NSCLC patient LCD, Palmetto GBA finalized a new LCD for our Guardant360 test that provides limited Medicare coverage for the Guardant360 test in patients
diagnosed  with  solid  cancers  of  non-central  nervous  system  origin.  The  new  LCD  covers  our  Guardant360  test  for  fee-for-service  Medicare  patients  with
advanced  cancers  who  meet  its  clinical  criteria  for  complete  genomic  profiling  with  NGS  of  tumor  tissue  to  optimize  treatment  selection  decisions  but  have
insufficient or unavailable tissue for molecular profiling. The expanded coverage decision is in line with FDA approvals of several tumor-agnostic drugs that are
based on a single genomic biomarker across all cancers or that are targetable across multiple cancer types. We expect Noridian Healthcare Solutions to issue a
new LCD for our Guardant360 test equivalent to the new LCD issued by Palmetto GBA, though the timing and scope of the Noridian LCD are uncertain. We
anticipate FDA approval of our Guardant360 test, if obtained, may support further improvements in coverage and reimbursement, including Medicare according
to the NGS NCD.

13

Commercial adoption

Success  in  each  of  the  layers  above  is  important  for  commercial  adoption  by  clinicians  and  biopharmaceutical  companies.  Additionally,  for  clinicians,
endorsement  by  KOLs  traction  at  academic  centers  and  inclusion  in  national  treatment  guidelines  is  important,  especially  for  clinical  adoption  in  the  local
community setting where 80% of cancer treatment occurs. Our relationships with key stakeholders across the oncology space, as well as the recent inclusion of
liquid biopsy under certain circumstances as a potential alternative to tissue biopsy in NCCN treatment guidelines has helped facilitate adoption of our tests by
7,000 oncologists, who have collectively ordered our Guardant360 test over 100,000 times, and by over 50 biopharmaceutical companies.

Our products and development programs

We have launched our Guardant360 and GuardantOMNI tests and are developing additional tests under our LUNAR program, including having launched our
LUNAR-1 assay for research or investigational use. We believe our product portfolio, once completed, will address the full continuum of care and has utility in
both the clinical and biopharmaceutical markets.

14

Therapy Selection

The increasing diversity of targeted therapies and associated molecular biomarkers has given rise to comprehensive genomic profiling, particularly in tumor types
where multiple genomic targets can be found and treated effectively. For example, NSCLC, like other tumors, has multiple effective treatment options targeting
different genomic mutations. There are nine targetable genes in NSCLC, which are comprised of alterations across all four genomic variant classes (SNVs, indels,
CNVs,  and  fusions),  as  well  as  TMB.  Five  of  these  targets  are  on-label  approved  biomarkers  for  FDA-approved  therapies.  The  NCCN  treatment  guidelines
recently  recommended  testing  for  all  of  the  genomic  mutations  or  alterations  across  different  cancer  types,  which  demonstrates  the  requirement  for  broader
genomic profiling.

Despite NCCN guidelines, data from a study of 800 NSCLC patients, published on Clinical Lung Cancer in November 2017, reported that only a minority of
patients  actually  were  tested  for  the  guideline-recommended  targetable  genomic  mutations,  and  only  8%  of  patients  were  comprehensively  genotyped.  A
retrospective review of data extracted from electronic medical records of 1,497 patients with pathologically confirmed metastatic colon cancer, or mCC, at 23
practices  across  the  United  States,  published  in  Journal  of  Clinical  Oncology  Precision  Oncology  in  December  2019,  showed  that  only  40%  of  such  1,497
patients  were  tested  according  to  guidelines  despite  longstanding  medical  guidelines  recommending  biomarker  testing  for  all  patients  with  mCC.  Such
“undergenotyping”  had  multiple  causes  in  the  study,  and  primary  reasons  for  not  testing  were  lack  of  sufficient  tissue,  poor  patient  performance  status  or
infeasibility to undergo a repeat biopsy for additional tissue.

Guardant360 Test

We believe Guardant360 test is the market leading comprehensive liquid biopsy test, based on the number of tests ordered. Guardant360 test is a 74 gene test that
supports treatment selection for advanced stage cancer patients with solid tumors. The testing process requires two 10 milliliter blood samples that are sent to our
laboratory in Redwood City, California, where we process and analyze the samples using proprietary, next-generation sequencing-based Guardant Health Digital
Sequencing Technology. Results are typically delivered in seven days following receipt of sample and delivered by a clinical report through fax, portal or mobile
device.

Since we launched our Guardant360 test in 2014, it has been ordered over 100,000 times by more than 7,000 oncologists across dozens of cancer types, by more
than 50 biopharmaceutical companies and by all 28 NCCN centers. Guardant360 test is also currently being developed for use as a companion diagnostic.

Guardant360 clinical report

A typical Guardant360 clinical report contains somatic mutations detected in patient blood samples, associated treatment options and available clinical trials in
the  vicinity  of  the  patient’s  location.  Additionally,  the  report  depicts  a  proprietary  visual  representation  that  shows  the  evolution  of  somatic  mutations  in
longitudinal blood samples.

Analytical validation

We believe there are two key performance characteristics that are critical for a liquid biopsy test. The first is sensitivity, which refers to the level of ctDNA in
circulation at which the technology reliably detects variants for a given input sample amount. The second is specificity, which is the probability that a given test
result  is  accurate.  These  metrics  are  critical  for  effective  treatment  selection  based  on  the  results  of  liquid  biopsy  testing.  It  can  be  especially  challenging  to
maintain  high  specificity  at  detection  levels  below  0.25%  due  to  the  high  error  rates  of  standard  next-generation  sequencing  protocols  at  these  levels  and  the
broad genomic footprint tested simultaneously in a comprehensive liquid biopsy test. In order to assess these key performance characteristics for Guardant360
test, we conducted analytical validation studies against orthogonally validated methods. The results, as published in Clinical Cancer Research, demonstrated that
Guardant360 test has a detection threshold of one to two molecules across multiple alteration types, including all four classes of genomic alterations and MSI,
with very high specificity which results in accurate and sensitive detection of somatic mutations in patient samples.

15

Clinical trials and publications

The goal of our clinical development with Guardant360 test is to support its use for comprehensive genomic profiling across multiple tumor types, including as a
preferred alternative to tissue testing to inform first line treatment right after diagnosis and at time of disease progression. We publish peer-reviewed studies in
order  to  influence  treatment  guidelines,  to  educate  clinicians  and  other  oncology  stakeholders  about  the  value  proposition  of  our  test  and  to  set  the  stage  for
reimbursement  with  private  and  public  payers.  We  have  over  50  approved,  completed  or  active  clinical  outcomes  studies,  more  than  150  peer-reviewed
publications and more than 400 scientific abstracts. We are proactively pursuing studies to support the use of our Guardant360 test as a preferred alternative to
tissue  testing  to  inform  first  line  treatment  right  after  diagnosis,  with  the  goal  to  provide  evidence  that  our  Guardant360  test  detects  genomic  alterations  at  a
similar rate compared to standard of care tissue testing in the United States, Europe and Asia. Such a strategy is predicated on the Guardant360 test’s ability to
offer accurate, reliable and fast guideline-directed comprehensive genotyping for all adult solid tumors without exposing patients to invasive biopsy procedures’
risks, delays or chance of failure.

The following summarizes the results of some of our Guardant360 test clinical studies:

Biomarker discovery rate. In the first quarter of 2019, we announced results from our Noninvasive vs. Invasive Lung Evaluation, or NILE, study after it met its
primary  endpoint  of  demonstrating  that  Guardant360  test  detected  targetable  genomic  biomarkers  in  advanced,  non-squamous  NSCLC  at  a  similar  rate  to
standard of care tissue testing. Our Guardant360 test identified guideline-recommended biomarkers in 77 of the 282 patients enrolled in the study, while tissue
testing identified such biomarkers in 60 of those patients. In the study, the median time to results for Guardant360 testing was much shorter than for tissue testing,
as Guardant360 test results were reported in an average of 9 days, while tissue testing results were reported in an average of 15 days, and our Guardant360 test
resulted in guideline-recommended testing for three times as many patients as standard-of-care tissue testing. We believe these data support the use of our testing
ahead of tissue testing for all newly diagnosed advanced NSCLC patients. Findings from an 800-patient prospective clinical trial led by the Institute of Cancer
Research London for treatment selection in advanced breast cancer, which we refer to as plasmaMATCH trial, as presented at the San Antonio Breast Cancer
Symposium in December 2019, showed that our Guardant360 test accurately detected biomarkers that can guide targeted treatment for late stage breast cancer
patients, many with bone metastases that are often difficult to biopsy and typically yield insufficient bone tissue for biomarker analysis.

Genotyping  concordance  with  matched  tumor  tissue  -  Results  of  a  blinded  retrospective  study  comprising  6,948  consecutive  NSCLC  samples  to  assess  the
concordance between Guardant360 test and tissue genotyping of samples received for clinical testing at our laboratory showed high positive predictive value,
which is the probability that a variant detected by Guardant360 test in blood was in fact present in the corresponding tissue sample. A study published in Clinical
Cancer Research in August 2019 concluded that microsatellite instability, or MSI, detection using the Guardant360 test was highly concordant with standard-of-
care tissue testing, which enabled detection of MSI status concurrent with comprehensive genomic profiling and expanded access to immunotherapy for advanced
cancer patients for whom current testing practices are inadequate.

Detection rate of ctDNA in patient samples - We observed a test success rate of 99.6% in a study comprising 10,593 consecutive samples to provide insights into
Guardant360  test  performance  in  real-world  clinical  specimens.  Overall  detection  rates  of  ctDNA  were  consistently  high  (85.9%),  predominantly  driven  by
NSCLC (87.7%), colorectal (85.0%) and breast (86.8%). We believe this cohort demonstrates the need for a highly sensitive liquid biopsy as the median variant
allele frequency, or VAF, found was only 0.46%.

Prospective  clinical  response  rate  -  A  prospective,  interventional,  multi-cancer  clinical  utility  study  of  Guardant360  test  across  193  patients  with  no  tissue
genotyping  options  showed  an  objective  response  rate  of  87%  (95%  CI,  58%-98%)  with  disease  control  rate  of  100%  (95%  CI,  75%-100%).  In  the  NSCLC
cohort, 73 patients were tested, 34 were matched with pre-specified therapy, of which 17 patients were treated with matched therapy, of which 15 patients were
evaluable. Importantly, the response rate was independent of the VAF of mutations found in the blood.

Clinical relevance of actionable mutations detected at ultra-low concentrations - We analyzed the clinical response of a multi-center case series of Guardant360
test-detected targetable driver alterations in advanced NSCLC with VAFs of less than 0.2%. Twelve patients were selected who had targetable driver alterations in
EGFR (n=7, VAF range 0.045%-0.14%), MET exon 14 skipping mutation (n=1, VAF = 0.06%), BRAF V600E (n=1, VAF = 0.1%), EML-ALK fusions (n=3, VAF
range 0.07-0.16%). All patients responded to targeted therapy with median progression-free survival of 52 weeks. Of particular significance, 7 out of 12 patients
were undergenotyped, largely due to tissue insufficiency.

16

GuardantConnect

Because  metastatic  cancer  patients  often  exhaust  standard  of  care  treatment  options  as  the  disease  progresses  and  guidelines  recommend  clinical  trials  for
advanced  cancer  patients,  clinical  trial  matching  is  an  acute  need  in  oncology.  At  the  same  time,  biopharmaceutical  companies  need  to  fill  clinical  trials  that
require  screening  hundreds  of  thousands  of  patients.  Despite  these  needs,  clinical  trial  enrollment  in  oncology  has  severely  lagged,  with  only  3-6%  of  cancer
patients enrolling in clinical trials. GuardantConnect is our integrated software solution designed for our clinical and biopharmaceutical customers, seeking to
connect patients in need tested with Guardant360 test with clinical trials.

GuardantOMNI Test

Our GuardantOMNI test is built on Guardant Health Digital Sequencing Technology and learnings from our Guardant360 test. The GuardantOMNI test, launched
in  2017,  has  a  significantly  larger  genomic  panel  footprint  than  the  Guardant360  test  and  has  achieved  comparable  analytical  performance  in  clinical  studies,
including for translational science applications in collaboration with several biopharmaceutical companies, including AstraZeneca, Bristol-Myers Squibb, Merck
MSD, Merck KGaA of Darmstadt, Germany and Pfizer. It covers 500 genes, including genes associated with homologous recombination repair deficiency and
biomarkers for immuno-oncology applications, such as tumor mutational burden and microsatellite instability.

In  order  to  preserve  performance  characteristics  of  our  Guardant360  test  across  a  broader  gene  panel,  we  implemented  additional  enhancements  to  the  assay
efficiency  and  bioinformatics  analysis  to  improve  the  sensitivity  of  our  GuardantOMNI  test.  These  enhancements  are  critical  in  the  context  of  using  the
GuardantOMNI test in the retrospective testing of clinical trial samples for translational science applications in collaboration with biopharmaceutical customers,
as those samples are often available with only a limited volume of plasma.

Validation data indicates that the GuardantOMNI test exceeds the Guardant360 test’s sensitivity for detecting clinically actionable biomarkers. At the same time,
broader panel-wide performance of small variants is roughly similar to that of Guardant360 test. The broad genomic footprint of our GuardantOMNI test enables
accurate measurement of tumor mutational burden. The GuardantOMNI test received breakthrough device designation from the FDA in December 2018 and is
currently  being  developed,  including  for  use  as  a  potential  companion  diagnostic,  to  identify  patients  who  may  benefit  from  immuno-oncology  therapeutics,
including patients that may more likely respond to immuno-oncology agents based on TMB.

LUNAR Program

We  believe  that  there  is  a  critical  need  to  develop  products  to  expand  precision  oncology  to  post-cancer  monitoring  and  earlier  stage  settings.  Such  products
would  enable  clinicians  to  precisely  detect,  monitor  and  select  the  appropriate  intervention  at  the  right  times  in  the  disease’s  evolution,  key  to  significantly
improving patient clinical outcomes. In order to systematically address this need, we launched our LUNAR program to develop tests to address the needs of early
stage  cancer  patients  with  neoadjuvant  and  adjuvant  treatment  selection,  cancer  survivors  with  surveillance,  and  asymptomatic  individuals  eligible  for  cancer
screening  and  individuals  at  a  higher  risk  for  developing  cancer  with  early  detection.  Our  research  and  development  results  to  date  indicate  that  somatic
signatures alone may be insufficient for detection of early stage cancers with high sensitivity. For this reason, we have incorporated epigenomic signatures to
enhance the performance of our LUNAR assays in these settings.

Our LUNAR-1 assay is intended to address identification of those who are likely to benefit from adjuvant treatment, detection of minimal residual disease in the
blood of cancer patients after surgery, and surveillance of patients who have completed curative cancer treatment to potentially detect recurrence at an earlier
stage.

Our LUNAR-2 assay is being developed to address early cancer detection in screening eligible asymptomatic individuals and higher risk individuals. Early cancer
detection is challenging, especially with respect to clinical specificity. There is a minimal amount of ctDNA in patients with low-disease burden. Additionally,
naturally occurring genomic aberrations in blood as well as signals from non-cancer related diseases can add biological noise obfuscating detection of circulating
tumor-related biomarkers. We believe we have the unique capability to overcome these challenges by leveraging our:

•

Vast  data  sets  and  deep  insights:  We  have  targeted  deep  sequencing  data  in  combination  with  low  coverage  sequencing  of  whole  genome  from  tens  of
thousands of cancer patients. This data has enabled discovery of novel epigenomic variations across multiple cancer types. We believe augmenting genomic
with epigenomic signatures can enhance the clinical sensitivity and specificity of our tests significantly. Moreover, we developed a database of biological
noise sources such as clonal hematopoiesis of indeterminate potential, which enables us to further enhance the sensitivity and specificity of our tests.

17

•

Extensive blood biobank: We have a biobank of tens of thousands of cancer samples that we use for discovery and, more importantly, biomarker verification
and validation. For example, we are analyzing these samples with whole genome sequencing to identify and confirm tumor associated signatures. Also, we
have been collecting additional samples through multiple on-going research collaborations.

Neoadjuvant and adjuvant treatment selection in early stage cancer patients

Neoadjuvant and adjuvant therapies may include chemotherapy, hormone therapy, radiation therapy, immunotherapy and targeted therapy. Neoadjuvant therapies
are delivered before the main treatment to help reduce the size of a tumor or kill cancer cells that have spread. Adjuvant therapies are delivered after the primary
treatment to destroy remaining cancer cells. Neoadjuvant and adjuvant therapies are often recommended when a patient with early-stage cancer undergoes surgery
or radiation therapy and the oncologist believes the patient may benefit from additional systemic treatments. Neoadjuvant and adjuvant therapies benefit many,
but not all, cancer patients. Our LUNAR-1 assay is intended to identify early stage cancer patients that may benefit from neoadjuvant and adjuvant treatment.

In  addition,  we  believe  there  is  an  opportunity  to  evaluate  clinical  utility  of  our  LUNAR-1  assay  by  partnering  with  biopharmaceutical  companies  to  identify
these patients for adjuvant trial enrollment and also monitor treatment effectiveness post-adjuvant treatment. In comparison to drug development in the metastatic
setting, adjuvant drug development can cost significantly more, typically require more patients, last longer and have a lower probability of success. Identification
of  those  most  likely  to  benefit  from  adjuvant  therapy  is  therefore  an  important  clinical  challenge.  We  believe  that  our  LUNAR-1  assay  could  support  ctDNA
enrichment strategies that may reduce the cost of these development activities, lead to new therapeutic indications and potentially reduce the use of cytotoxic
chemotherapy  in  patients  unlikely  to  benefit.  In  June,  2019,  results  presented  by  us,  together  with  the  Massachusetts  General  Hospital  Cancer  Center,  at  the
American Society of Clinical Oncology, or ASCO, annual meeting, provided evidence regarding our LUNAR-1 assay’s ability to identify early-stage colorectal
cancer patients with post-operative molecular residual disease who may benefit from adjuvant therapy.

Minimal residual disease and recurrence detection in cancer survivors

Minimal residual disease is a term generally used to describe the small number of cancer cells in the body after cancer treatment. After treating cancer, remaining
cancer cells can become active and start to multiply, causing a relapse of the disease. Detecting minimal residual disease may indicate that the treatment was not
completely effective or that the treatment was incomplete. The number of remaining cells may be so small that they do not cause any physical signs or symptoms
and often cannot even be detected through traditional methods. Testing for minimal residual disease can help the treatment team distinguish between patients who
need additional or different treatment from those who do not. This knowledge can also potentially guide treatment decisions and improve patient outcomes.

A recurrence occurs when the cancer comes back after treatment. This can happen weeks, months, or even years after the primary cancer was treated. Cancer
survivors in general face a risk of developing another cancer, and fear of recurrence can negatively affect quality of life.

Our LUNAR-1 assay is intended to provide cancer survivors with quantitative peace of mind through a test for minimal residual disease or recurrence and help
physicians determine those patients that may still have minimal residual disease or identify a risk of relapse much earlier than conventional methods and therefore
finds candidates for earlier intervention.

To  further  pursue  this  potential  market  opportunity,  we,  in  collaboration  with  a  National  Clinical  Trials  Network  group,  initiated  a  prospective  multi-center
randomized controlled trial, which we refer to as the COBRA study, in approximately 1,400 patients with resected stage II colon cancer to use our LUNAR-1
assay to evaluate recurrence-free survival in patients who receive ctDNA-directed therapy as compared to the current standard-of-care active surveillance.

Early cancer detection in screening eligible asymptomatic individuals

Colorectal cancer may not cause symptoms until the cancer has spread and is difficult to treat, which makes screening for colorectal cancer in people who do not
readily demonstrate symptoms appealing. It has the potential to find the cancer earlier when it may be easier to treat, and reduce disease-specific mortality. Based
on the 2009-2015 cancer statistics from the Surveillance, Epidemiology, and End Results (SEER) program of the National Cancer Institute, the average five-year
survival rate for all U.S. colorectal cancer patients is 64.4% and is increased to 89.9% among those diagnosed at an early stage.

18

Our  LUNAR-2  assay  is  being  developed  to  identify  people  who  are  likely  to  benefit  from  screening  for  colorectal  cancer.  In  April  2019,  at  the  American
Association  for  Cancer  Research,  or  AACR,  annual  meeting,  we  presented  exploratory  data  around  the  use  of  our  LUNAR-2  assay  for  potential  screening
applications in a cohort of 229 recently diagnosed colorectal cancer patients and aged-matched cancer-free controls. These data showed average LUNAR-2 assay
sensitivity exceeding 80% with specificity of 94% for patients with stage I/II colorectal cancer in this cohort (76% in stage I and 87% in stage II). To further
pursue this potential market opportunity, we initiated a prospective screening study, which we refer to as the ECLIPSE trial, to evaluate the performance of our
LUNAR-2 assay in detecting colorectal cancer in average-risk adults. We expect to recruit approximately 10,000 patients and enrolled the first patient in the study
in the fourth quarter of 2019.

Early cancer detection in higher risk individuals

Although  cancer  is  the  second  leading  cause  of  death  in  the  United  States,  it  can  be  cured  if  detected  and  treated  at  its  earliest  stages.  For  example,  the
introduction  of  the  Pap  smear  reduced  cervical  cancer  mortality  by  more  than  80%  from  1950  to  2005.  However,  despite  the  benefit  of  screening,  which  is
recommended  by  the  U.S.  Preventive  Services  Task  Force  for  cervical,  breast,  lung  and  colorectal  cancers,  a  significant  number  of  people  do  not  receive
screening today. For example, greater than 30% of eligible Americans are not up to date on screening for colorectal cancer.

We believe some of the major challenges lie in the limited efficacy of existing screening modalities:

Protein testing - Current screening tests using protein biomarkers for various cancers, including prostate (PSA), pancreatic (CA19-9) and ovarian (CA125), lack
sensitivity and specificity.

Imaging - While radiographic imaging is sensitive, it lacks clinical specificity. For lung cancer screening, as an example, the landmark National Lung Cancer
Screening Trial reported that low-dose computed tomography, or LDCT, lung cancer screening of heavy smokers significantly increased cancer diagnosis rate and
decreased  overall  mortality.  However,  a  recent  practice  survey  reported  that  only  3.9%  of  the  estimated  6.8  million  eligible  patients  had  received  LDCT
screening. An important barrier to adoption of LDCT screening has been its greater than 95% false positive rate, which results in many unnecessary biopsies or
inaction on positive findings.

Our goal is to develop an accurate, affordable test with potential for high compliance for use in higher risk individuals. To support this development, we have
forged several clinical research collaborations, including with institutions such as the University of San Francisco, the University of Colorado and the University
of Pennsylvania, studying applications of our LUNAR-2 assay for different cancer types.

Commercialization

U.S. clinical commercial efforts

We  sell  our  tests  to  clinical  customers  in  the  United  States  through  our  targeted  sales  organization.  As  of  December  31,  2019,  our  clinician-focused  sales
organization  in  the  United  States  is  engaged  in  sales  efforts  and  promotional  activities  primarily  targeting  oncologists  and  cancer  centers.  Our  sales
representatives  typically  have  extensive  backgrounds  in  laboratory  testing,  therapeutics  and  oncology. We  have  supplemented  the  team  with  clinical  oncology
specialists with extensive medical affairs experience for molecular information support in the field.  

Our clinical commercial efforts are focused on driving adoption with academic research institutions and with community oncology practices, including through
leading physician networks. As we continue to grow our sales organization, we are also expanding our reach to include large community practices, community
oncology  networks,  integrated  delivery/  payer-owned  systems  and  government  medical  facilities  that  are  looking  for  a  reliable  partner  for  comprehensive
molecular information testing. 

International clinical commercial efforts

We currently offer our tests in countries outside the United States primarily through distributor relationships or direct contracts with hospitals.

Currently, all customer samples are shipped globally to our laboratory in Redwood City, California. We are conducting studies in various jurisdictions in an effort
to secure reimbursement. As these studies progress and we near commercial opportunities there, we may seek to establish an in-country laboratory and direct
sales  organization.  Specifically,  we  have  already  demonstrated  the  ability  to  deploy  our  technology  to  partner  laboratories  such  as  cancer  centers,  for  the
development of liquid biopsy assays based on our technology platform. We believe that this capability will be important in accelerating adoption of our platform
and the performance of liquid biopsy testing in certain countries.

19

Together with SoftBank, we formed a joint venture, Guardant Health AMEA, Inc., which we refer to as the Joint Venture, relating to the sale, marketing and
distribution of our tests in all areas worldwide outside of North America, Central America, South America, the United Kingdom, all other member states of the
European Union as of May 2017, Iceland, Norway, Switzerland and Turkey, or the JV Territory. Depending on the market opportunity in a country, the Joint
Venture  may  create  direct  operations  or  conduct  its  operations  through  either  a  distribution  model  or  a  licensing  model.  Direct  operations  would  entail  full
operations including a laboratory, sales and marketing and regulatory among other functions. Under the distribution model, our tests would be marketed and sold
by the Joint Venture or third-party distributors in relevant countries within the JV Territory, and the tests would be performed by or on behalf of us or our affiliates
outside of such countries on samples obtained by the Joint Venture or third-party distributors in such countries. Under the license model, the Joint Venture, or an
entity designated by the Joint Venture, would be licensed to market and sell the tests in relevant countries within the JV Territory, and the Joint Venture, or an
entity designated by the Joint Venture, would perform the tests on samples obtained in such countries. Following a determination by the board of directors of the
Joint Venture on the appropriate model for an individual country, we will enter into an agreement with the Joint Venture with respect to the individual country that
is based on either the distribution or license model. We expect to rely on the Joint Venture to accelerate commercialization of our products in Asia, the Middle
East, and Africa.

Currently, we and the Joint Venture are primarily focused on expanding our commercial capabilities in Asia, with an initial focus on Japan. There are estimated to
be over 400,000 deaths from solid tumor cancers annually in Japan with a significant portion relating to lung and gastric cancers. We are involved in several
nationwide clinical programs that help establish clinical utility of our Guardant360 test in the Japanese population with the first patient tested in late 2018.

Biopharmaceutical commercial efforts

Our business development team is focused on enterprise selling to biopharmaceutical companies in the United States and internationally. Our strategy with each
biopharmaceutical customer is to demonstrate the value proposition of the Guardant Health Oncology Platform and expand its utilization across the organization
from  early  stage  research  through  clinical  development  to  commercialization.  Given  the  broad  and  differentiated  utility  of  our  platform,  we  believe  we  can
support our biopharmaceutical customers across many applications, including:

•

•

•

•

discovery of new targets and mechanisms of acquired resistance;

retrospective sample analysis to rapidly identify biomarkers associated with response and lack of response;

prospective screening and referral services to accelerate clinical trial enrollment; and

companion diagnostic development to support the approval and commercialization of therapeutics.

We also expect to be able to capture other commercial opportunities from our genomic data, which can be used in combination with clinical outcomes or claims
data for multiple applications, including novel target identification.

Payer coverage and reimbursement

We  believe  our  tests  and  services  provide  solutions  that  enhance  the  safety,  efficacy  and  guide  cost-effective  treatment  selection  of  cancer  therapeutics,  as
evidenced by the adoption from key stakeholders in the healthcare ecosystem. Evidence-based analytical validity, clinical validity and clinical utility studies are
key  drivers  of  both  clinical  adoption  and  reimbursement  from  commercial  and  government  payers.  Peer-reviewed  evidence  of  our  products  and  services  will
continue to be a center piece of our reimbursement strategy.

We believe our products offer significant health economic value to payers in the following ways:

•
alternatives such as immunotherapy; and

reduce  undergenotyping,  thereby  matching  health  plan  members  to  targeted  therapies  that  are  both  less  costly  and  more  effective  than  potential

•

reduce the need for a repeat invasive biopsy, thereby avoiding the associated high costs and risks of tissue biopsy complications.

In sum, we believe our tests help payers reduce both diagnostic and treatment costs, while simultaneously and most importantly improving clinical outcomes.

We estimate total lung cancer coverage in the United States for our Guardant360 test to be a total of more than 170 million lives, including Medicare beneficiaries
and members of several commercial health plans.

20

Commercial third-party payers and patient billing

Payment from third-party payers differs depending on whether we have entered into a contract with the payers as a “participating provider” or do not have a
contract and are considered a “non-participating provider.” Payers will often reimburse non-participating providers at a lower amount than participating providers
or not at all. Where we are not reimbursed in full or at all, we may elect to appeal the insurer’s underpayment or denial of payment or seek payment from the
patient. However, insurer appeal and patient collection efforts take a substantial amount of time and resources and are often unsuccessful. Additionally, there are
several  national  third-party  commercial  payers  that  have  adopted  non-coverage  policies  that  treat  both  tissue  and  liquid  comprehensive  genomic  profiling,  or
CGP, testing, including our Guardant360 test, as experimental or investigational at this time.

We have provided testing services to patients with many cancer types and indications, most of the time as a non-participating provider through 2019. We received
reimbursement for tests across the spectrum of these patients, though for amounts that on average were significantly lower than for participating providers.

When we contract with a payer to serve as a participating provider, reimbursements by the payer are generally made pursuant to a negotiated fee schedule and are
limited to only covered indications or where prior approval has been obtained. Becoming a participating provider can result in higher reimbursement amounts for
covered uses of our test and, potentially, no reimbursement for non-covered uses identified under the payer’s policies or the contract. As a result, the potential for
more favorable reimbursement associated with becoming a participating provider may be offset by a potential loss of reimbursement for non-covered uses of our
tests. In addition, we have experienced situations where commercial payers proactively reduced the amounts they were willing to reimburse for our tests, and
where commercial payers have determined that the amounts previously paid were too high and sought to recover those perceived excess payments by deducting
such amounts from payments owed to us.

Coverage  from  commercial  payers  has  been  focused  on  NSCLC,  which  represented  approximately  44%  of  our  U.S.  clinical  testing  volume  in  2019  and
approximately 46% of our U.S. clinical testing volume in both 2018 and 2017. To date, the benefit of increased reimbursement for covered NSCLC Guardant360
testing as a participating provider has been approximately offset by the loss of reimbursement on tests for non-covered indications previously received when we
served as a non-participating provider. Therefore, the net result of receiving coverage for a particular indication, including NSCLC, may be little to no change in
our average revenue per test for all our patients served by these insurance payers.

We are actively engaged to expand coverage among existing contracted providers and to achieve coverage with the remaining key commercial payers, laboratory
benefit managers and evidence review organizations. This includes addressing variable coverage requirements and evidence required, and the need for enhanced
guideline support. Our existing contracted payers, which include Cigna, Priority Health and multiple Blue Cross Blue Shield regional plans, have determined that
the analytical validity, clinical validity and clinical utility evidence requirements for medical policy inclusion of our Guardant360 test in NSCLC have been met.
In addition, as of July 1, 2019, our Guardant360 test is a covered benefit for the members of the health plans associated with eviCore, a technology assessment
company, as being considered medically necessary to assist in selecting therapy for patients with advanced lung cancer.

As we broaden our coverage amongst existing providers to include additional tests, we may begin to experience increases in average revenue per test performed;
however, we cannot make any assurances that we will be successful in broadening our coverage on a timely basis or at all. Similarly, as we have experienced with
our existing contracted payers, we cannot assure that the addition of new contracted payers will increase our average selling price or revenue.

In  addition  to  our  existing  contracted  payers,  various  laboratory  benefit  managers  and  national  expert  opinion  organizations  who  work  with  these  plans  have
endorsed coverage of our Guardant360 test. The analytical validity, clinical validity and clinical utility evidence requirements for medical policy inclusion of our
Guardant360 test in NSCLC have been met by multiple commercial payers and laboratory benefit managers.

Government payers

Medicare coverage is limited to items and services that are within the scope of a Medicare benefit category that are reasonable and necessary for the diagnosis or
treatment  of  an  illness  or  injury.  National  coverage  determinations  are  made  through  an  evidence-based  process  by  CMS,  with  opportunities  for  public
participation. Medicare’s NGS NCD (CAG-00450N) provides coverage for molecular diagnostic tests such as our Guardant360 test, if, among other criteria, such
tests are offered within their FDA-approved companion diagnostic labeling.

21

In July 2018, Palmetto GBA, or Palmetto, the MAC responsible for administering MolDx, issued an LCD for the Guardant360 test for NSCLC patients with a
date of service on or after August 27, 2018 who meet certain clinical criteria. Noridian Healthcare Solutions, or Noridian, the MAC responsible for adjudicating
claims in California, where our laboratory is located, is a participant in MolDx. Noridian published an equivalent LCD that adopts the positive coverage decision
from Palmetto in the Noridian jurisdiction, effective as of October 20, 2018. In December 2019, replacing its prior NSCLC patient LCD, Palmetto finalized a new
LCD  for  our  Guardant360  test  to  provide  limited  Medicare  coverage  for  use  of  the  Guardant360  test  for  patients  diagnosed  with  solid  cancers  of  non-central
nervous system origin. The new LCD requires that patients are recurrent, relapsed, refractory, metastatic, or advanced cancer patients who are seeking further
treatment  and  are  potential  candidates  for  an  FDA-approved  or  NCCN-recommended  (for  Category  1  or  2A  level  of  evidence)  biomarker  targeted  therapy.
Additionally, the patient must not have had previous Guardant360 testing and must be untreated or not responding on the patient’s current therapy. A patient who
has previously been tested with the Guardant360 test and has progressed with new malignant growth since the prior test is considered to have a new primary
cancer diagnosis and thus is eligible to have another test. Finally, for qualifying cancers other than NSCLC, tissue-based comprehensive genomic profiling must
be infeasible for coverage. NSCLC patients would be eligible for coverage if tissue-based testing is infeasible or if previous tissue-based comprehensive genomic
profiling returned no actionable results. The new LCD covers our Guardant360 test for fee-for-service Medicare patients with advanced cancers who meet its
clinical  criteria  for  complete  genomic  profiling  with  next-generation  sequencing,  or  NGS,  of  tumor  tissue  to  optimize  treatment  selection  decisions  but  have
insufficient  or  unavailable  tissue  for  molecular  profiling.  The  expanded  Medicare  coverage  decision  is  in  line  with  FDA  approvals  of  several  tumor-agnostic
drugs that are based on a single genomic biomarker across all cancers or that are targetable across multiple cancer types. We expect Noridian Healthcare Solutions
to issue a new LCD for our Guardant360 test equivalent to the new LCD issued by Palmetto, though the timing and scope of the Noridian LCD are uncertain. We
anticipate approval by the FDA, if obtained, may support further improvements in coverage and reimbursement for our Guardant360 test.

Under Medicare, payment for laboratory tests like ours is generally made under the Clinical Laboratory Fee Schedule, or CLFS, with payment amounts assigned
to specific procedure billing codes. In April 2014, Congress passed the Protecting Access to Medicare Act of 2014, or PAMA, which included substantial changes
to the way in which clinical laboratory services are paid under Medicare. On June 23, 2016, CMS published the final rule implementing the reporting and rate-
setting requirements under PAMA. Under PAMA, laboratories that receive the majority of their Medicare revenue from payments made under the CLFS were
required to report to CMS, beginning in 2017 and every three years thereafter (or annually for “advanced diagnostic laboratory tests”), commercial payer payment
rates and volumes for each test they perform. CMS uses this data to calculate a weighted median payment rate for each test, which is used to establish revised
Medicare CLFS reimbursement rates for the test. As we have begun billing Medicare for our tests, we are subject to reporting requirements under PAMA and the
Medicare rate for our tests will be calculated in the future based on our private payer rates. For tests furnished on or after January 1, 2018, Medicare payments for
clinical diagnostic laboratory tests are based upon these reported commercial payer rates.

State Medicaid programs make individual coverage decisions for diagnostic tests and have taken steps to control the cost, utilization and delivery of healthcare
services.

We believe that additional state and federal health care reform measures may be adopted in the future, any of which could have a material adverse effect on the
clinical laboratory industry and our ability to successfully commercialize our tests. Any of these or other changes could substantially impact our revenues and
increase costs. We cannot predict how future healthcare policy changes, if any, will affect our business and financial success.

Operations

We perform the Guardant360 and GuardantOMNI tests in our clinical laboratory located in Redwood City, California. Our laboratory is CAP-accredited, CLIA-
certified, NYSDOH-permitted and also licensed in California, Florida, Maryland, Pennsylvania and Rhode Island.

The  proprietary  validated  methods  utilize  robust  semi-automated  workflows  designed  for  high  throughput  sample  testing.  This  methodology  allows  for  rapid
scaling of testing volume without impacting performance metrics. These processes allow us to successfully deliver greater than 98% of results successfully. The
workflows allow for rapid generation of reports delivering greater than 80% of results within seven calendar days from the day of sample receipt.

Our  Guardant360  testing  process  includes  blood  collection,  laboratory  processing,  analysis  and  reporting.  All  major  processing  steps  utilize  quality  control  to
ensure consistent and reproducible results.

22

Guardant Health Digital Sequencing Technology

Guardant  Health  Digital  Sequencing  Technology  combines  state-of-the-art  technology  from  multiple  disciplines  and  is  enabled  by  robust,  high-efficiency
biochemistry at the front-end, next-generation sequencing and a machine learning augmented bioinformatics pipeline. The technology, through machine learning,
has accrued performance improvements by incorporating learnings generated from the data collected from additional samples.

Two specific enhancements achieved by Guardant Health Digital Sequencing Technology are:

•

•

High-efficiency chemistry: Overall efficiency of Guardant Health Digital Sequencing in recovery of ctDNA molecules from starting input amount of ctDNA
to the post-sequencing analysis of reconstructed molecules indicates the vast majority of extracted ctDNA molecules are converted into a sequencing library,
which exceeds most other next-generation sequencing preparations by more than 100%;

Error suppression via proprietary bioinformatics engine: Error suppression through Guardant Health Digital Sequencing corresponds to a typical error rate of
approximately one error per 3,000,000 reconstructed molecule nucleotides of high quality. This should be compared to the simplest single-end sequencing
error rate of approximately one error per 1,000 sequenced nucleotides and approximately one error per 100,000 nucleotides that could be achieved by other
assays relying on molecular barcoding alone.

Supply chain

We  utilize  industry  leading  vendors  for  our  supply  chain.  Most  reagents  and  materials  are  sourced  from  a  limited  number  of  vendors  and  would  require
qualification to transition to a different vendor. To mitigate risk, we employ a multi-month, multi-lot safety stock strategy to ensure an uninterrupted supply of
reagent and material to our laboratory. In the event that a latent defect is identified, the lot of material in use is expected to be timely quarantined and changed for
a new vendor lot that has been previously qualified for use. The experience with our vendors during last five years has provided us confidence in their ability to
produce consistent and quality instrumentation, reagents and materials.

In September 2014, we entered into a supply agreement with Illumina, Inc., or Illumina, for Illumina to provide products and services that can be used for certain
research  and  clinical  activities,  including  certain  sequencers,  equipment  and  other  materials  that  we  use  in  our  laboratory  operations.  Subsequently,  we  and
Illumina amended the supply agreement to, among other things, update the specific products and services to be provided, and pricing terms therefor, and to extend
the  initial  term  of  the  supply  agreement.  During  the  term  of  the  supply  agreement,  as  amended,  Illumina  will  supply  us  with  sequencers,  reagents,  and  other
consumables for use with the Illumina sequencers, as well as service contracts for the maintenance and repair of the sequencers.

During  the  term  of  the  supply  agreement,  as  amended,  we  are  required  to  make  a  rolling,  non-binding  forecast  of  our  expected  needs  for  reagents  and  other
consumables, and place purchase orders for reagents and other consumables, and Illumina may not unreasonably reject conforming purchase orders. Subject to
discounts that vary depending on the volume of hardware and reagents and other consumables ordered, the price for sequencers and for service contracts is based
on  Illumina  list  prices,  and  the  price  for  reagents  and  other  consumables  is  based  on  contract  prices  that  are  fixed  for  a  set  period  of  time  and  may  increase
thereafter subject to limitations. The supply agreement does not require us to order minimum amounts of hardware, or to use exclusively the Illumina platform for
conducting our sequencing.

The supply agreement contains negotiated use limitations, representations and warranties, indemnification, limitations of liability, and other provisions. The initial
term  of  the  supply  agreement,  as  amended,  continues  until  December  2021,  and  the  supply  agreement  automatically  renews  for  additional  one-year  terms
thereafter unless either we or Illumina provide the other with notice of termination one year in advance of the date when such termination is to take effect. Either
we or Illumina may terminate the supply agreement for the other’s uncured material breach, bankruptcy or insolvency-related events, or in the event a regulatory
authority notifies such party that continued performance under the supply agreement would violate applicable laws or regulations.

Competition

Growing understanding of the importance of biomarkers linked with therapy selection and response is leading to more companies offering services in genomic
profiling.  The  promise  of  liquid  biopsy  is  also  leading  to  more  companies  attempting  to  enter  the  space  and  compete  with  us.  Our  main  competition  is  from
diagnostic companies with products and services to profile genes in cancers based on either single-marker or comprehensive genomic profile testing, based on
next-generation sequencing in either blood or tissue.

23

Our competitors within the liquid biopsy space include Foundation Medicine, Inc., which was acquired by Roche Holdings, Inc. in July 2018, Roche Molecular
Systems, Inc., Thermo Fisher Scientific, Inc., Illumina, Inc., Personal Genome Diagnostics, Inc., Qiagen N.V. and Sysmex Inostics. In addition, GRAIL, Inc. and
Natera, Inc., among others, are our competitors in early cancer detection.

Competitors  within  the  broader  genomics  profiling  space  based  on  tissue  include  laboratory  companies  such  as  Bio-Reference  Laboratories,  Inc.,  Laboratory
Corporation of America and Quest Diagnostics, Inc., as well as companies such as Foundation Medicine, Inc., Caris Life Science and Myriad Genetics, Inc. that
sell molecular diagnostic tests for cancer to physicians and have or may develop tests that compete with Guardant360 and GuardantOMNI tests. In addition, we
aware that certain of our customers are also developing their own tests and may decide to enter our market or otherwise stop using our tests.

In addition to developing kits, certain diagnostic companies also provide next-generation sequencing platforms that could be used for liquid biopsy testing. These
include  Illumina,  Inc.,  Thermo  Fisher  Scientific  Inc.,  and  other  companies  developing  next-generation  sequencing  platforms  that  are  sold  directly  to
biopharmaceutical  companies,  clinical  laboratories  and  research  centers.  While  many  of  the  applications  for  these  platforms  are  focused  on  research  and
development applications, each of these companies has launched and could continue to commercialize products focused on the clinical oncology market. These
tests could include FDA-approved diagnostic kits, which can be sold to the clients who have purchased their platforms.

Furthermore, many companies are developing information technology-based tools to support the integration of next-generation sequencing testing into the clinical
setting. These companies may also use their own tests or others to develop an integrated system which could limit our access to certain networks.

We believe key competitive factors affecting our success are the price and performance of our products, evidence of clinical differentiation, support by KOLs,
commercial competitiveness, turnaround time and scope and quality of payer contracts. Our Guardant Health Oncology Platform has developed strengths across
five layers, which we believe form a barrier to entry and a competitive advantage. However, we cannot assure that we will continue to compete effectively on
each of those layers.

Intellectual property

Protection of our intellectual property is fundamental to the long-term success of our business. We seek to ensure that investments made into the development of
our  technology  are  protected  by  relying  on  a  combination  of  patents,  trademarks,  copyrights,  trade  secrets  (such  as  know-how),  license  agreements,
confidentiality agreements and procedures, non-disclosure agreements, invention disclosure and assignment agreements and other contractual rights.

Our  patent  strategy  is  focused  on  seeking  coverage  for  our  core  technology,  our  digital  sequencing  platform,  and  specific  follow-on  applications  and
implementations  for  detecting  and  monitoring  cancer  or  other  diseases  by  determining  genetic  variations  in  patient  samples.  In  addition,  we  file  for  patent
protection  on  our  on-going  research  and  development  particularly  into  early  stage  cancer  detection,  including  on  pattern  recognition  based,  for  example,  on
analyzing our extensive patient blood sample database.

Our patent portfolio includes owned and licensed patents and patent applications, generally falling into three broad categories:

•

•

•

applications and patents relating to our digital sequencing platform, including claims directed to methods for sequencing cell-free DNA, identifying CNVs,
SNVs, indels and fusions in cell-free DNA and techniques for enriching nucleic acid samples;

applications and patents relating to detecting and monitoring cancer and other diseases by determining genetic variations in biological samples; and

applications and patents relating to early-stage cancer detection.

Issued U.S. patents and their international counterparts currently in our patent portfolio that relate to various aspects of our technology and products are expected
to expire between 2026 and 2037.

Our proprietary technology is also bolstered by our acquisition of, and procurement of licenses to, technologies developed by third parties. While we developed
our digital sequencing platform internally, we believe the technologies underlying our licenses from third parties, which typically relate to improvements to next-
generation sequencing technologies, are potentially valuable and of possible strategic importance to us or our competitors. Under some of these agreements, we
are obligated to pay low single-digit percentage running royalties on net sales where the licensed technology is used in the product or service sold, subject to
minimum annual royalties or fees in certain agreements.

24

Our customers and partners recognize us as being a leader in the liquid biopsy field. Thus, just as patent and trade secret protection is essential to protecting our
technology, we believe that it is equally as important for us to protect our brand and identity. We have filed for trademark protection in our name, logo and initial
products in the United States.

We intend to pursue additional intellectual property protection to the extent we believe it would advance our business objectives. Despite our efforts to protect our
intellectual  property  rights,  they  may  not  be  respected  in  the  future  or  may  be  invalidated,  circumvented  or  challenged.  In  addition,  laws  of  various  foreign
countries where our products are or expected to be sold may not protect our intellectual property rights to the same extent as laws in the United States.

We also rely on trade secrets, including know-how, unpatented technology and other proprietary information, to maintain and strengthen our competitive position.
We have determined that certain technologies, such as aspects of our sample preparation methods and some bioinformatic analysis techniques, are better kept as
trade secrets. To mitigate the chance of trade secret misappropriation, it is our policy to enter into nondisclosure and confidentiality agreements with parties who
have access to our trade secrets, such as our employees, collaborators, outside scientific collaborators, consultants, advisors and other third parties. We also enter
into invention disclosure and assignment agreements with our employees and consultants that obligate them to assign to us any inventions they have developed
while working for us.

Government regulations

Federal and state laboratory licensing requirements

Under CLIA, a laboratory is any facility that performs laboratory testing on specimens derived from humans for the purpose of providing information for the
diagnosis, prevention or treatment of disease, or the impairment of or assessment of health. CLIA requires that a laboratory hold a certificate applicable to the
type  of  laboratory  examinations  it  performs  and  that  it  complies  with,  among  other  things,  standards  covering  operations,  personnel,  facilities  administration,
quality  systems  and  proficiency  testing,  which  are  intended  to  ensure,  among  other  things,  that  clinical  laboratory  testing  services  are  accurate,  reliable  and
timely.

To renew our CLIA certificate, we are subject to survey and inspection every two years to assess compliance with program standards. Because we are a CAP
accredited  laboratory,  CMS  does  not  perform  this  survey  and  inspection  and  relies  on  our  CAP  survey  and  inspection.  We  also  may  be  subject  to  additional
unannounced inspections. Laboratories performing high complexity testing are required to meet more stringent requirements than laboratories performing less
complex tests. In addition, a laboratory that is certified as “high complexity” under CLIA may develop, manufacture, validate and use proprietary tests referred to
as laboratory developed tests, or LDTs. CLIA requires analytical validation including accuracy, precision, specificity, sensitivity and establishment of a reference
range for any LDT used in clinical testing. The regulatory and compliance standards applicable to any testing we perform may change over time and any such
changes could have a material effect on our business.

CLIA provides that a state may adopt laboratory regulations that are more stringent than those under federal law, and a number of states have implemented their
own more stringent laboratory regulatory requirements. For example, state laws may require that nonresident laboratories, or out-of-state laboratories, maintain an
in-state laboratory license to perform tests on samples from patients who reside in that state. As a condition of state licensure, these state laws may require that
laboratory personnel meet certain qualifications, specify certain quality control procedures or facility requirements or prescribe record maintenance requirements.
Because our laboratory is located in the State of California, we are required to and do maintain a California state laboratory license. We maintain a current license
with NYSDOH for our laboratory. In addition, our laboratory is licensed in a few states where nonresident laboratories are required to obtain state laboratory
licenses under certain circumstances, including Florida, Maryland, Pennsylvania and Rhode Island. Other states may currently have or adopt similar licensure
requirements in the future, which may require us to modify, delay or stop its operations in those states.

Failure to comply with CLIA certification and state clinical laboratory licensure requirements may result in a range of enforcement actions, including certificate
or  license  suspension,  limitation,  or  revocation,  directed  plan  of  action,  onsite  monitoring,  civil  monetary  penalties,  criminal  sanctions,  and  revocation  of  the
laboratory’s approval to receive Medicare and Medicaid payment for its services, as well as significant adverse publicity.

CLIA  and  state  laws  and  regulations,  operating  together,  sometimes  limit  the  ability  of  laboratories  to  offer  consumer-initiated  testing  (also  known  as  “direct
access testing”). CLIA certified laboratories are permitted to perform testing only upon the order of an “authorized person,” defined as an individual authorized
under  state  law  to  order  tests  or  receive  test  results,  or  both.  Many  states  do  not  permit  persons  other  than  licensed  healthcare  providers  to  order  tests.  We
currently do not offer direct access testing and our CLIA tests may only be ordered by authorized healthcare providers.

25

Regulatory framework for medical devices in the United States

Pursuant to its authority under the Federal Food, Drug and Cosmetic Act, or the FDCA, the FDA has jurisdiction over medical devices, which are defined to
include, among other things, in vitro diagnostic devices, or IVDs. The FDA regulates, among other things, the research, design, development, pre-clinical and
clinical  testing,  manufacturing,  safety,  effectiveness,  packaging,  labeling,  storage,  recordkeeping,  pre-market  clearance  or  approval,  adverse  event  reporting,
marketing, promotion, sales, distribution and import and export of medical devices. Unless an exemption applies, each new or significantly modified medical
device  we  seek  to  commercially  distribute  in  the  United  States  will  require  either  a  premarket  notification  to  the  FDA  requesting  permission  for  commercial
distribution under Section 510(k) of the FDCA, also referred to as a 510(k) clearance, or approval from the FDA of a PMA. Both the 510(k) clearance and PMA
processes can be resource intensive, expensive, and lengthy, and require payment of significant user fees.

Device classification

Under  the  FDCA,  medical  devices  are  classified  into  one  of  three  classes-Class  I,  Class  II  or  Class  III-depending  on  the  degree  of  risk  associated  with  each
medical device and the extent of control needed to provide reasonable assurances with respect to safety and effectiveness.

Class I includes devices with the lowest risk to the patient and are those for which safety and effectiveness can be reasonably assured by adherence to a set of
FDA regulations, referred to as the General Controls for Medical Devices, which require compliance with the applicable portions of the FDA’s quality system
regulation, or QSR, facility registration and product listing, reporting of adverse events and malfunctions, and appropriate, truthful and non-misleading labeling
and promotional materials. Some Class I devices also require premarket clearance by the FDA through the 510(k) premarket notification process described below.
Most Class I products are exempt from the premarket notification requirements.

Class  II  devices  are  those  that  are  subject  to  the  General  Controls,  as  well  as  special  controls  as  deemed  necessary  by  the  FDA  to  ensure  the  safety  and
effectiveness of the device. These special controls can include performance standards, patient registries, FDA guidance documents and post-market surveillance.
Most  Class  II  devices  are  subject  to  premarket  review  and  clearance  by  the  FDA.  Premarket  review  and  clearance  by  the  FDA  for  Class  II  devices  is
accomplished through the 510(k) premarket notification process.

Class  III  devices  include  devices  deemed  by  the  FDA  to  pose  the  greatest  risk  such  as  life-supporting  or  life-sustaining  devices,  or  implantable  devices,  in
addition  to  those  deemed  novel  and  not  substantially  equivalent  following  the  510(k)  process.  The  safety  and  effectiveness  of  Class  III  devices  cannot  be
reasonably  assured  solely  by  the  General  Controls  and  special  controls  described  above.  Therefore,  these  devices  are  subject  to  the  PMA  process,  which  is
generally more costly and time-consuming than the 510(k) process. As part of the PMA process, the applicant must submit data and information demonstrating
reasonable  assurance  of  the  safety  and  effectiveness  of  the  device  for  its  intended  use  to  the  FDA’s  satisfaction.  Accordingly,  a  PMA  application  typically
includes,  but  is  not  limited  to,  extensive  technical  information  regarding  device  design  and  development,  pre-clinical  and  clinical  trial  data,  manufacturing
information, labeling and financial disclosure information for the clinical investigators in device studies. A PMA application must also provide valid scientific
evidence that demonstrates to the FDA’s satisfaction a reasonable assurance of the safety and effectiveness of the device for its intended use.

The investigational device exemption (IDE) process

In the United States, absent certain limited exceptions, human clinical trials intended to support medical device clearance or approval require an IDE application.
Some types of studies deemed to present “non-significant risk” are deemed to have an approved IDE once certain requirements are addressed and institutional
review board, or IRB, approval is obtained. If the device presents a “significant risk” to human health, as defined by the FDA, the sponsor must submit an IDE
application to the FDA and obtain IDE approval prior to commencing the human clinical trials. The IDE application must be supported by appropriate data, such
as animal and laboratory testing results, showing that it is safe to test the device in humans and that the testing protocol is scientifically sound. Generally, clinical
trials for a significant risk device may begin only after the IDE application is approved by the FDA and the study protocol and informed consent are approved by
appropriate IRBs at the clinical trial sites. There can be no assurance that submission of an IDE will result in the ability to commence clinical trials, and although
the FDA’s approval of an IDE allows clinical testing to go forward for a specified number of subjects, it does not bind the FDA to accept the results of the trial as
sufficient to prove the product’s safety and efficacy, even if the trial meets its intended success criteria.

26

Such clinical trials must be conducted in accordance with the FDA’s IDE regulations that govern investigational device labeling, prohibit promotion and specify
an  array  of  recordkeeping,  reporting  and  monitoring  responsibilities  of  study  sponsors  and  study  investigators.  Such  clinical  trials  must  also  comply  with  the
FDA’s good clinical practice regulations for IRB approval and for informed consent and other human subject protections. Required records and reports are subject
to inspection by the FDA. The results of clinical testing may be unfavorable, or, even if the intended safety and efficacy success criteria are achieved, may not be
considered sufficient for the FDA to grant marketing approval or clearance of a product. The commencement or completion of any clinical trial may be delayed or
halted, or be inadequate to support approval of a PMA application, for numerous reasons, including, but not limited to, the following:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the FDA or other regulatory authorities do not approve a clinical trial protocol or a clinical trial, or place a clinical trial on hold;

patients do not enroll in clinical trials at the rate expected;

patients do not comply with trial protocols;

patient follow-up is not at the rate expected;

patients experience adverse events;

patients die during a clinical trial, even though their death may not be related to the products that are part of the trial;

device malfunctions occur with unexpected frequency or potential adverse consequences;

side effects or device malfunctions of similar products already in the market that change the FDA’s view toward approval of new or similar PMAs or result in
the imposition of new requirements or testing;

institutional review boards and third-party clinical investigators may delay or reject the trial protocol;

third-party  clinical  investigators  decline  to  participate  in  a  trial  or  do  not  perform  a  trial  on  the  anticipated  schedule  or  consistent  with  the  clinical  trial
protocol, investigator agreement, investigational plan, good clinical practices, the IDE regulations or other FDA or IRB requirements;

third-party investigators are disqualified by the FDA;

we or third-party organizations do not perform data collection, monitoring and analysis in a timely or accurate manner or consistent with the clinical trial
protocol or investigational or statistical plans, or otherwise fail to comply with the IDE regulations governing responsibilities, records and reports of sponsors
of clinical investigations;

third-party clinical investigators have significant financial interests related to us or our study such that the FDA deems the study results unreliable, or the
company or investigators fail to disclose such interests;

regulatory inspections of our clinical trials or manufacturing facilities, which may, among other things, require us to undertake corrective action or suspend or
terminate our clinical trials;

changes in government regulations or administrative actions;

the interim or final results of the clinical trial are inconclusive or unfavorable as to safety or efficacy; or

the FDA concludes that our trial designs are unreliable or inadequate to demonstrate safety and efficacy.

The 510(k) clearance process

Under  the  510(k)  clearance  process,  the  manufacturer  must  submit  to  the  FDA  a  premarket  notification,  demonstrating  that  the  device  is  “substantially
equivalent” to a legally marketed predicate device. A predicate device is a legally marketed device that is not subject to a PMA, i.e., a device that was legally
marketed prior to May 28, 1976 (pre-amendments device) and for which a PMA is not required, a device that has been reclassified from Class III to Class II or I,
or a device that was previously found substantially equivalent through the 510(k) process. To be “substantially equivalent,” the proposed device must have the
same  intended  use  as  the  predicate  device,  and  either  have  the  same  technological  characteristics  as  the  predicate  device  or  have  different  technological
characteristics  and  not  raise  different  questions  of  safety  or  effectiveness  than  the  predicate  device.  Clinical  data  is  sometimes  required  to  support  substantial
equivalence.

27

After  a  510(k)  premarket  notification  is  submitted,  the  FDA  determines  whether  to  accept  it  for  substantive  review.  If  it  lacks  necessary  information  for
substantive review, the FDA will refuse to accept the 510(k) notification. If it is accepted for filing, the FDA begins a substantive review. By statute, the FDA is
required to complete its review of a 510(k) notification within 90 days of receiving the 510(k) notification. As a practical matter, clearance often takes longer, and
clearance is never assured. Although many 510(k) premarket notifications are cleared without clinical data, the FDA may require further information, including
clinical data, to make a determination regarding substantial equivalence, which may significantly prolong the review process. If the FDA agrees that the device is
substantially equivalent, it will grant clearance to commercially market the device.

If the FDA determines that the device is not “substantially equivalent” to a predicate device, or if the device is automatically classified into Class III, the device
sponsor must then fulfill the much more rigorous pre-marketing requirements of the PMA approval process, or seek reclassification of the device through the de
novo process. The de novo classification process is an alternate pathway to classify medical devices that are automatically classified into Class III but which are
low to moderate risk. A manufacturer can submit a petition for direct de novo review if the manufacturer is unable to identify an appropriate predicate device and
the  new  device  or  new  use  of  the  device  presents  a  moderate  or  low  risk.  De  novo  classification  may  also  be  available  after  receipt  of  a  “not  substantially
equivalent” letter following submission of a 510(k) to FDA.

After  a  device  receives  510(k)  clearance,  any  modification  that  could  significantly  affect  its  safety  or  effectiveness,  or  that  would  constitute  a  new  or  major
change  in  its  intended  use,  will  require  a  new  510(k)  clearance  or,  depending  on  the  modification,  could  require  a  PMA  application.  The  FDA  requires  each
manufacturer to determine whether the proposed change requires a new submission in the first instance, but the FDA can review any such decision and disagree
with  a  manufacturer’s  determination.  Many  minor  modifications  are  accomplished  by  a  letter-to-file  in  which  the  manufacture  documents  the  change  in  an
internal letter-to-file. The letter-to-file is in lieu of submitting a new 510(k) to obtain clearance for such change. The FDA can always review these letters to file
in an inspection. If the FDA disagrees with a manufacturer’s determination regarding whether a new premarket submission is required for the modification of an
existing 510(k)-cleared device, the FDA can require the manufacturer to cease marketing and/or recall the modified device until 510(k) clearance or approval of a
PMA application is obtained. In addition, in these circumstances, the FDA can impose significant regulatory fines or penalties for failure to submit the requisite
application(s).

In addition, over the last several years, the FDA has proposed reforms to its 510(k) clearance process, and such proposals could include increased requirements
for  clinical  data  and  a  longer  review  period,  or  could  make  it  more  difficult  for  manufacturers  to  utilize  the  510(k)  clearance  process  for  their  products.  For
example, in November 2018, FDA officials announced forthcoming steps that the FDA intends to take to modernize the premarket notification pathway under
Section 510(k) of the FDCA. Among other things, the FDA announced that it planned to develop proposals to drive manufacturers utilizing the 510(k) pathway
toward  the  use  of  newer  predicates.  These  proposals  included  plans  to  potentially  sunset  certain  older  devices  that  were  used  as  predicates  under  the  510(k)
clearance pathway, and to potentially publish a list of devices that have been cleared on the basis of demonstrated substantial equivalence to predicate devices that
are  more  than  10  years  old.  In  May  2019,  the  FDA  solicited  public  feedback  on  these  proposals.  The  FDA  requested  public  feedback  on  whether  it  should
consider certain actions that might require new authority, such as whether to sunset certain older devices that were used as predicates under the 510(k) clearance
pathway. These proposals have not yet been finalized or adopted, and the FDA may work with Congress to implement such proposals through legislation.

More  recently,  in  September  2019,  the  FDA  finalized  guidance  describing  an  optional  “safety  and  performance  based”  premarket  review  pathway  for
manufacturers of “certain, well-understood device types” to demonstrate substantial equivalence under the 510(k) clearance pathway by showing that such device
meets objective safety and performance criteria established by the FDA, thereby obviating the need for manufacturers to compare the safety and performance of
their  medical  devices  to  specific  predicate  devices  in  the  clearance  process.  The  FDA  intends  to  develop  and  maintain  a  list  device  types  appropriate  for  the
“safety and performance based” pathway and will continue to develop product-specific guidance documents that identify the performance criteria for each such
device type, as well as the testing methods recommended in the guidance documents, where feasible.

The PMA process

Following receipt of a PMA application, the FDA conducts an administrative review to determine whether the application is sufficiently complete to permit a
substantive review. If it is not, the agency will refuse to file the PMA. If it is, the FDA will accept the application for filing and begin the review. The FDA has
180  days  to  review  a  filed  PMA  application,  although  the  review  of  an  application  more  often  occurs  over  a  significantly  longer  period  of  time.  During  this
review  period,  the  FDA  may  request  additional  information  or  clarification  of  information  already  provided  and  may  issue  a  major  deficiency  letter  to  the
applicant, requesting the applicant’s response to deficiencies communicated by the FDA.

28

Before  approving  or  denying  a  PMA,  an  FDA  advisory  committee  may  review  the  PMA  at  a  public  meeting  and  provide  the  FDA  with  the  committee’s
recommendation  on  whether  the  FDA  should  approve  the  submission,  approve  it  with  specific  conditions,  or  not  approve  it.  The  FDA  is  not  bound  by  the
recommendations of an advisory committee, but it considers such recommendations carefully when making decisions.

Prior to approval of a PMA, the FDA may conduct inspections of the clinical trial data and clinical trial sites, as well as inspections of the manufacturing facility
and processes. Overall, the FDA review of a PMA application generally takes between one and three years but may take significantly longer. The FDA can delay,
limit or deny approval of a PMA application for many reasons, including:

•

•

•

•

the device may not be shown safe or effective to the FDA’s satisfaction;

the data from pre-clinical studies and/or clinical trials may be found unreliable or insufficient to support approval;

the manufacturing process or facilities may not meet applicable requirements; and

changes in FDA approval policies or adoption of new regulations may require additional data.

If the FDA evaluation of a PMA is favorable, the FDA will issue either an approval letter, or an approvable letter, the latter of which usually contains a number of
conditions that must be met in order to secure final approval of the PMA. When and if those conditions have been fulfilled to the satisfaction of the FDA, the
agency will issue a PMA approval letter authorizing commercial marketing of the device, subject to the conditions of approval and the limitations established in
the approval letter. If the FDA’s evaluation of a PMA application or manufacturing facilities is not favorable, the FDA will deny approval of the PMA or issue a
not  approvable  letter.  The  FDA  may  also  determine  that  additional  tests  or  clinical  trials  are  necessary,  in  which  case  the  PMA  approval  may  be  delayed  for
several months or years while the trials are conducted and data is submitted in an amendment to the PMA, or the PMA is withdrawn and resubmitted when the
data are available. The PMA process can be expensive, uncertain and lengthy and a number of devices for which the FDA approval has been sought by other
companies have never been approved for marketing.

New  PMA  applications  or  PMA  supplements  are  required  for  modification  to  the  manufacturing  process,  equipment  or  facility,  quality  control  procedures,
sterilization,  packaging,  expiration  date,  labeling,  device  specifications,  ingredients,  materials  or  design  of  a  device  that  has  been  approved  through  the  PMA
process.  PMA  supplements  often  require  submission  of  the  same  type  of  information  as  an  initial  PMA  application,  except  that  the  supplement  is  limited  to
information needed to support changes from the device covered by a PMA and may or may not require as extensive technical or clinical data or the convening of
an advisory panel, depending on the nature of the proposed change.

In approving a PMA application, as a condition of approval, the FDA may require some form of post-approval study or post-market surveillance, whereby the
applicant conducts a follow-up study or follows certain patient groups for a number of years and makes periodic reports to the FDA on the clinical status of those
patients  when  necessary  to  protect  the  public  health  or  to  provide  additional  or  longer  term  safety  and  effectiveness  data  for  the  device.  The  FDA  may  also
approve a PMA application with other post-approval conditions intended to ensure the safety and effectiveness of the device, such as restrictions on labeling,
promotion, sale, distribution and use. New PMA applications or PMA supplements may also be required for modifications to approved diagnostic tests, including
modifications to manufacturing processes, device labeling and device design, based on the findings of post-approval studies.

FDA regulation of laboratory developed tests

Although  the  FDA  regulates  medical  devices,  including  IVDs,  the  FDA  has  historically  exercised  its  enforcement  discretion  and  not  enforced  applicable
provisions of the FDCA and FDA regulations with respect to LDTs, which are a subset of IVDs that are intended for clinical use and are developed, validated and
offered within a single laboratory for use only in that laboratory. We currently market our Guardant360 test as an LDT and therefore currently do not expect the
FDA to enforce its medical device regulations and the applicable FDCA provisions on Guardant360 testing.

29

Legislative  and  administrative  proposals  addressing  oversight  of  LDTs  were  introduced  in  recent  years  and  we  expect  that  new  legislative  and  administrative
proposals will be introduced from time to time. It is possible that legislation could be enacted into law or regulations or guidance could be issued by the FDA
which may result in new or increased regulatory requirements for us to continue to offer our LDTs or to develop and introduce new tests as LDTs. For example, in
2014 the FDA issued two draft guidance documents proposing a risk-based framework with respect to applying the FDA’s oversight over LDTs. The Framework
Guidance stated that the FDA intended to modify its policy of enforcement discretion with respect to LDTs in a risk-based manner consistent with the existing
classification  of  medical  devices.  Thus,  we  believe  the  FDA  planned  to  begin  to  enforce  its  medical  device  requirements,  including  premarket  submission
requirements, on LDTs that have historically been marketed without FDA premarket review and oversight. In November 2016, the FDA announced its intention
not to finalize the 2014 draft guidance to allow for further public discussion on an appropriate oversight approach to LDTs and to give congressional authorizing
committees the opportunity to develop a legislative solution. In January 2017, the FDA issued a discussion paper on possible approaches to LDT regulation.

Although the FDA halted finalization of the guidance in November 2016 to allow for further public discussion on an appropriate oversight approach to LDTs and
to give congressional authorizing committees the opportunity to develop a legislative solution, the FDA could ultimately modify its current approach to LDTs in a
way  that  would  subject  our  products  marketed  as  LDTs  to  the  enforcement  of  regulatory  requirements.  Moreover,  legislative  measures  have  recently  been
proposed in Congress that, if ultimately enacted, could provide the FDA with additional authority to require premarket review of and regulate LDTs.

Research use only or investigational use only devices

Our GuardantOMNI test and LUNAR-1 assay are currently available for research use only, or RUO, or for investigational use only, or IUO, depending on the
proposed application. An RUO device is an IVD that is in the laboratory research phase of development. RUO devices must bear prominent labeling stating: “For
Research Use Only. Not for use in diagnostic procedures.” An IUO device is an IVD that in the product testing phase of development. An IUO device must bear
prominent  labeling  stating:  “For  Investigational  Use  Only.  The  performance  characteristics  of  this  product  have  not  been  established.”  Neither  RUO  or  IUO
devices may be used in clinical practice, and such devices cannot be advertised or promoted for clinical or diagnostic purposes. Devices that are intended for
RUO  or  IUO  and  are  properly  labeled  as  RUO  or  IUO  are  exempt  from  compliance  with  the  FDA  requirements  discussed  above,  including  the  approval  or
clearance and QSR requirements. A device labeled RUO or IUO but intended to be used diagnostically may be viewed by the FDA as adulterated and misbranded
under the FDCA and is subject to FDA enforcement activities. The FDA may consider the totality of the circumstances surrounding distribution and use of an
RUO or IUO device, including how the device is marketed, when determining its intended use.

EAP (Expedited Access Program)/Breakthrough Devices Program

The EAP was a voluntary program for certain medical devices that demonstrate the potential to address unmet medical needs for life threatening or irreversibly
debilitating diseases or conditions that are subject to premarket submissions. Under the EAP, the FDA worked with device sponsors to try to reduce the time and
cost  from  development  to  marketing  decision  without  changing  the  FDA’s  PMA  standard  of  reasonable  assurance  of  safety  and  effectiveness  or  any  other
standards of valid scientific evidence. Components of the EAP include priority review, more interactive review, senior management involvement, and assignment
of a case manager.

Pursuant  to  the  21st  Century  Cures  Act,  the  Breakthrough  Devices  provisions  were  added  to  the  FDCA.  The  Breakthrough  Devices  Program  is  a  voluntary
program intended to expedite the review, development, assessment and review of certain medical devices that provide for more effective treatment or diagnosis of
life-threatening or irreversibly debilitating human diseases or conditions for which no approved or cleared treatment exists or that offer significant advantages
over existing approved or cleared alternatives. For Breakthrough Devices, the FDA intends to provide interactive and timely communication with the sponsor
during device development and throughout the review process. FDA also intends to assign staff to be available within a reasonable time to address questions by
institutional  review  committees  concerning  the  conditions  and  clinical  testing  expectations  applicable  to  the  investigational  use  of  a  Breakthrough  Device.  In
addition, all submissions for devices designated as Breakthrough Devices will receive priority review, meaning that the review of the submission is placed at the
top  of  the  appropriate  review  queue  and  receives  additional  review  resources,  as  needed.  The  Breakthrough  Devices  Program  superseded  the  EAP  and  the
previous  priority  review  program  for  medical  device  submissions.  The  FDA  has  indicated  that  all  participants  previously  granted  EAP  designation  will  have
designation  as  breakthrough  devices,  and  that  no  separate  action  will  necessary  for  sponsors  of  EAP-designated  devices  to  receive  breakthrough  device
designation for such devices.

In January 2018, we received EAP designation from the FDA for our Guardant360 test. In December 2018, we received breakthrough device designation from
the FDA for our GuardantOMNI test.

30

Companion Diagnostics

For  certain  of  our  tests,  we  are  pursuing  development  as  in  vitro  companion  diagnostics  for  use  in  selecting  the  patients  that  may  respond  to  our  partners’
pharmaceutical  products.  Companion  diagnostics  are  regulated  by  the  FDA  as  medical  devices.  The  FDA  issued  a  final  guidance  document  in  July  2014
addressing agency policy in relation to in vitro  companion  diagnostic  tests.  The  guidance  explains  that  for  some  drugs  and  therapeutic  biologics,  the  use  of  a
companion diagnostic test is essential for the safe and effective use of the product, such as when the use of a product is limited to a specific patient subpopulation
that  can  be  identified  by  using  the  test.  According  to  the  guidance,  the  FDA  generally  requires  the  therapeutic  product  and  the  companion  diagnostic  to  be
developed and approved or cleared contemporaneously. In July 2016, the FDA issued a draft guidance intended to assist sponsors of the drug therapeutic and in
vitro  companion  diagnostic  device  on  issues  related  to  co-development  of  the  products,  and  in  December  2018,  FDA  issued  a  draft  guidance  describing
considerations for the development and labeling of in vitro companion diagnostic devices to support the indicated uses of multiple drug or biological oncology
products.

Pervasive and continuing FDA regulation

After a device enters commercial distribution, numerous regulatory requirements continue to apply. These include:

•

•

•

•

•

•

the  FDA’s  QSR,  which  requires  manufacturers,  including  third-party  manufacturers,  to  follow  stringent  design,  testing,  production,  control,
supplier/contractor selection, complaint handling, documentation and other quality assurance procedures during all aspects of the manufacturing process;

labeling regulations, unique device identification requirements and FDA prohibitions against the promotion of products for uncleared, unapproved or off-
label uses;

advertising and promotion requirements;

restrictions on sale, distribution or use of a device;

PMA annual reporting requirements;

PMA approval of product modifications, or the potential for new 510(k) clearances for certain modifications to 510(k)-cleared devices;

• medical device reporting regulations, which require that manufacturers report to the FDA if their device may have caused or contributed to a death or serious

injury or malfunctioned in a way that would likely cause or contribute to a death or serious injury if the malfunction were to recur;

• medical  device  correction  and  removal  reporting  regulations,  which  require  that  manufacturers  report  to  the  FDA  field  corrections  and  product  recalls  or

removals if undertaken to reduce a risk to health posed by the device or to remedy a violation of the FDCA that may present a risk to health;

•

•

•

•

recall  requirements,  including  a  mandatory  recall  if  there  is  a  reasonable  probability  that  the  device  would  cause  serious  adverse  health  consequences  or
death;

an order of repair, replacement or refund;

device tracking requirements; and

post-market surveillance regulations, which apply when necessary to protect the public health or to provide additional safety and effectiveness data for the
device.

The FDA has broad post-market and regulatory enforcement powers. Medical device manufacturers are subject to unannounced inspections by the FDA and other
state,  local  and  foreign  regulatory  authorities  to  assess  compliance  with  the  QSR  and  other  applicable  regulations,  and  these  inspections  may  include  the
manufacturing facilities of any suppliers. Failure to comply with applicable regulatory requirements can result in enforcement action by the FDA, which may
include sanctions such as: warning letters, fines, injunctions, consent decrees and civil penalties; unanticipated expenditures, repair, replacement, refunds, recall
or seizure of our products; operating restrictions, partial suspension or total shutdown of production; the FDA’s refusal of our requests for 510(k) clearance or
premarket  approval  of  new  products,  new  intended  uses  or  modifications  to  existing  products;  the  FDA’s  refusal  to  issue  certificates  to  foreign  governments
needed  to  export  products  for  sale  in  other  countries;  and  withdrawing  510(k)  clearance  or  premarket  approvals  that  have  already  been  granted  and  criminal
prosecution.

31

Federal and state fraud and abuse laws

We are subject to federal fraud and abuse laws such as the federal Anti-Kickback Statute, or AKS, the federal Eliminating Kickbacks in Recovery Act, or EKRA,
the federal prohibition against physician self-referral, or Stark Law, and the federal false claims law, or the False Claims Act, or FCA. We are also subject to
similar state and foreign fraud and abuse laws.

The AKS prohibits knowingly and willfully offering, paying, soliciting, or receiving remuneration, directly or indirectly, overtly or covertly, in cash or in kind, in
return  for  or  to  induce  such  person  to  refer  an  individual,  or  to  purchase,  lease,  order,  arrange  for,  or  recommend  purchasing,  leasing  or  ordering,  any  good,
facility, item or service that is reimbursable, in whole or in part, under a federal healthcare program. 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 an AKS violation constitutes a false or fraudulent claim for purposes of the False Claims Act.

The EKRA prohibits knowingly and willfully soliciting or receiving any remuneration (including any kickback, bribe or rebate) directly or indirectly, overtly or
covertly, in cash or in kind, in return for referring a patient or patronage to a laboratory; or paying or offering any remuneration (including any kickback, bribe or
rebate) directly or indirectly, overtly or covertly, in cash or in kind, to induce a referral of an individual to a laboratory or in exchange for an individual using the
services of that laboratory. The EKRA applies to all payers including commercial payers and government payers, and EKRA violations result in significant fines
and/or up to 10 years in jail, separate and apart from existing AKS regulations.

The Stark Law and similar state laws, including California’s Physician Ownership and Referral Act, generally prohibit, among other things, clinical laboratories
and other entities from billing a patient or any governmental or commercial payer for any diagnostic services when the physician ordering the service, or any
member of such physician’s immediate family, has a direct or indirect investment interest in or compensation arrangement with us, unless the arrangement meets
an exception to the prohibition.

Other federal fraud and abuse laws to which we are subject include but are not limited to the federal civil and criminal false claims laws including the FCA,
which imposes liability on any person or entity that, among other things, knowingly presents, or causes to be presented, a false or fraudulent claim for payment to
the federal government, and the federal Civil Monetary Penalties Law, which prohibits, among other things, the offering or transfer of remuneration to a Medicare
or state healthcare program beneficiary if the person knows or should know it is likely to influence the beneficiary’s selection of a particular provider, practitioner,
or supplier of services reimbursable by Medicare or a state healthcare program, unless an exception applies. Under the FCA, private citizens can bring claims on
behalf of the government through qui tam actions. We must also operate within the bounds of the fraud and abuse laws of the states in which we do business
which may apply to items or services reimbursed by non-governmental third-party payers, including private insurers.

Efforts to ensure that our business arrangements with third parties comply with applicable laws and regulations will involve substantial costs. 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, imprisonment, exclusion from government-funded healthcare programs, such as Medicare and Medicaid, disgorgement,
contractual damages, reputational harm, diminished profits and future earnings, additional reporting or oversight obligations if we become subject to a corporate
integrity agreement or other agreement to resolve allegations of non-compliance with the law and the curtailment or restructuring of our operations, any of which
could adversely affect our ability to operate our business and our results of operations. If any physicians or other healthcare providers or entities with whom we
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.

Privacy and Security

Under  the  administrative  simplification  provisions  of  the  Health  Insurance  Portability  and  Accountability  Act  of  1996,  or  HIPAA,  as  amended  by  the  Health
Information Technology for Economic and Clinical Health Act, or HITECH, the U.S. Department of Health and Human Services, or HHS, issued regulations that
establish  uniform  standards  governing  the  conduct  of  certain  electronic  healthcare  transactions  and  requirements  for  protecting  the  privacy  and  security  of
protected health information, or PHI, used or disclosed by covered entities. Covered entities and their business associates are subject to HIPAA and HITECH.
Because we are a health care provider that electronically transmits health care information to payers, we are a covered entity under HIPAA. Our subcontractors
that create, receive, maintain or transmit or otherwise process PHI on our behalf must also comply with HIPAA as business associates thereunder.

32

HIPAA and HITECH include the privacy and security rules, breach notification requirements and electronic transaction standards. The privacy rule covers the use
and disclosure of PHI by covered entities and business associates. The privacy rule generally prohibits the use or disclosure of PHI except as permitted under the
rule. The rule also sets forth individual patient rights, such as the right to access or amend certain records containing his or her PHI, or to request restrictions on
the  use  or  disclosure  of  his  or  her  PHI.  The  security  rule  requires  covered  entities  and  business  associates  to  safeguard  the  confidentiality,  integrity,  and
availability of electronically transmitted or stored PHI by implementing administrative, physical and technical safeguards. Under HITECH’s breach notification
rule, a covered entity must notify individuals, the Secretary of the HHS, and in some circumstances, the media of breaches of unsecured PHI.

If they are found to be in violation of HIPAA as the result of a breach of unsecured PHI, a complaint about their privacy practices or an audit by HHS, entities
may be subject to significant civil and criminal fines and penalties and/or additional reporting and oversight obligations if such entities are required to enter into a
resolution agreement and corrective action plan with HHS to settle allegations of HIPAA non-compliance.

In addition, we may be subject to state health information privacy, security and data breach notification laws, which may govern the collection, use, disclosure
and protection of health-related and other personal information. State laws may be more stringent, broader in scope or offer greater individual rights with respect
to PHI than HIPAA. California, for example, has enacted the Confidentiality of Medical Information Act, which sets forth standards in addition to HIPAA and
HITECH with which all California health care providers like us must abide. In addition, the California Consumer Privacy Act, or the CCPA, was signed into law
on June 28, 2018, and went into effect January 1, 2020. The CCPA contains new disclosure obligations for businesses that collect personal information about
California residents and affords those individuals new rights relating to their personal information that may affect our ability to use personal information. The
CCPA authorizes private lawsuits to recover statutory damages for certain data breaches. Although the CCPA exempts protected health information regulated by
HIPAA  and  certain  data  regarding  clinical  trials,  the  CCPA,  to  the  extent  applicable  to  our  business  and  operations,  may  increase  our  compliance  costs  and
potential liability with respect to other personal information we maintain about California residents. The CCPA has substantial penalties for non-compliance and
we  continue  to  assess  its  impact  on  our  business.  Complying  with  these  various  state  laws  and  regulations,  which  may  differ  from  state  to  state,  requires
significant resources and may complicate our compliance efforts. Penalties  for  violation  of  any  of  these  laws  and  regulations  may  include  sanctions  against  a
laboratory’s licensure, as well as civil and/or criminal penalties.

U.S. healthcare reform

In the United States, there have been a number of legislative and regulatory changes at the federal and state levels which seek to reduce healthcare costs and
improve the quality of healthcare. For example, in March 2010, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education
Affordability Reconciliation Act, or the ACA, became law. The ACA substantially changed the way healthcare is financed by both commercial and government
payers and contains a number of provisions expected to impact our business and operations, some of which in ways we cannot currently predict, including those
governing enrollment in federal and state healthcare programs, reimbursement changes and fraud and abuse.

Since its enactment, there have been efforts to repeal all or part of the ACA, and the current Presidential Administration and U.S. Congress have taken action to
roll  back  certain  provisions  of  the  ACA.  For  example,  the  Tax  Cuts  and  Jobs  Act,  among  other  things,  removes  penalties  for  not  complying  with  the  ACA’s
individual mandate to carry health insurance. On December 14, 2018, a U.S. District Court Judge in the Northern District of Texas, or the Texas District Court
Judge, ruled that the individual mandate is a critical and inseverable feature of the ACA, and therefore, because it was repealed as part of the Tax Cuts and Jobs
Act, the remaining provisions of the ACA are invalid as well. On December 18, 2019, the U.S. Court of Appeals for the 5th Circuit upheld the district court’s
decision that the individual mandate was unconstitutional but remanded the case back to the District Court to determine whether the remaining provisions of the
Affordable Care Act are invalid as well. It is unclear how these decisions, subsequent appeals, if any, and other efforts to challenge, repeal or replace the ACA
will impact the ACA.

In  addition,  other  legislative  changes  have  been  proposed  and  adopted  since  the  ACA  was  enacted.  On  August  2,  2011,  the  Budget  Control  Act  of  2011  was
signed into law, which, among other things, reduced Medicare payments to providers by 2% per fiscal year, effective on April 1, 2013 and, due to subsequent
legislative amendments to the statute, will remain in effect through 2029 unless additional Congressional action is taken.

We  anticipate  there  will  continue  to  be  proposals  by  legislators  at  both  the  federal  and  state  levels,  regulators  and  commercial  payers  to  reduce  costs  while
expanding individual healthcare benefits. Certain of these changes could impose additional limitations on the prices we will be able to charge for our tests, the
coverage of or the amounts of reimbursement available for our tests from payers, including commercial and government payers.

33

Employees

As of December 31, 2019, we had 622 full-time employees, with 560 in technology, research and development, sales and business development, regulatory and
medical affairs, reimbursement and client services, as well as laboratory operations, and 62 in general and administrative functions. Of these full-time employees,
171 work remotely and the remainder work in our headquarters in Redwood City, California. None of our employees is represented by a labor union with respect
to his or her employment with us. We consider our relationship with our employees to be good.

Corporate information

We were incorporated in Delaware in 2011 as Guardant Health, Inc.

Available information

Our  website  is  located  at  https://guardanthealth.com.  Our  Annual  Reports  on  Form  10-K,  Quarterly  Reports  on  Form  10-Q,  Current  Reports  on  Form  8-K,
including their 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, 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 Annual Report on 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  http://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.

34

Item 1A. Risk Factors

Our operations and financial results are subject to various risks and uncertainties including those described below. You should consider carefully the risks and
uncertainties described below, in addition to other information contained in this Annual Report on Form 10-K, including our consolidated financial statements
and related notes. The risks and uncertainties described below are not the only ones we face. Additional risks and uncertainties that we are unaware of, or that
we currently believe are not material, may also become important factors that adversely affect our business. If any of the following risks or others not specified
below materialize, our business, financial condition and results of operations could be materially and adversely affected. In that case, the trading price of our
common stock could decline.

Risks related to our business and strategy

We have incurred significant losses since inception, we may continue to incur losses in the future and we may not be able to generate sufficient revenue to
achieve and maintain profitability.

We have incurred significant losses since our inception. For the years ended December 31, 2019, 2018 and 2017, we incurred net losses of 67.9 million, 84.3
million  and  83.2 million,  respectively.  As  of  December  31,  2019,  we  had  an  accumulated  deficit  of  352.8 million.  To  date,  we  have  financed  our  operations
principally from the sale of stock and revenue from precision oncology testing and our development services. We have devoted substantially all of our resources
to the development and commercialization of our current products and to research and development activities related to our LUNAR program, including clinical
and regulatory initiatives to obtain marketing approval and sales and marketing activities. We will need to generate substantial revenue to achieve and then sustain
profitability,  and  even  if  we  achieve  profitability,  we  cannot  be  sure  that  we  will  remain  profitable  for  any  period  of  time.  Our  failure  to  achieve  or  maintain
profitability could negatively impact the value of our common stock.

We  may  not  be  able  to  generate  sufficient  revenue  to  achieve  and  maintain  profitability  and  our  current  or  future  products  may  not  achieve  or  maintain
sufficient commercial market acceptance.

We are currently not profitable. Even if we succeed in increasing adoption of our existing products and services by physicians, obtaining additional coverage
decisions from commercial and government payers, maintaining and creating relationships with our existing and new biopharmaceutical partners, and developing
and commercializing additional products and services, we may not be able to generate sufficient revenue to achieve or maintain profitability.

We believe our commercial success is dependent upon our ability to continue to successfully market and sell our current products, including our Guardant360 and
GuardantOMNI  tests,  and  our  future  products,  to  continue  to  expand  our  current  relationships  and  develop  new  relationships  with  clinicians  and
biopharmaceutical  customers  and  to  develop  and  commercialize  new  products  based  on  our  Guardant  Health  Oncology  Platform.  Our  ability  to  achieve  and
maintain sufficient commercial market acceptance of our existing and future products will depend on a number of factors, including:

•

•

•

•

•

•

•

•

our ability to increase awareness of our tests and the benefits of liquid biopsy;

the rate of adoption and/or endorsement of our tests by clinicians, KOLs, advocacy groups and biopharmaceutical companies;

the timing and scope of any approval by the FDA for our tests;

our ability to obtain positive coverage decisions for our tests from additional commercial payers and to broaden the scope of indications included in such
coverage decisions;

our ability to obtain reimbursement and expanded coverage from government payers, including Medicare;

the impact of our investments in product innovation and commercial growth;

negative publicity regarding ours or our competitors’ products resulting from defects or errors; and

our ability to further validate our technology through clinical research and accompanying publications.

35

We cannot assure that we will be successful in addressing each of these criteria or other criteria that might affect the market acceptance of our products. If we are
unsuccessful in achieving and maintaining market acceptance of our products, our business and results of operations will suffer.

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

Our quarterly and annual operating results may fluctuate significantly, which makes it difficult for us to predict our future operating results. These fluctuations
may occur due to a variety of factors, many of which are outside of our control, including, but not limited to:

•

•

•

•

•

•

•

•

•

•

•

•

the level of demand for any of our products, which may vary significantly;

the  timing  and  cost  of,  and  level  of  investment  in,  research,  development,  regulatory  approval  and  commercialization  activities  relating  to  our  products,
which may change from time to time;

the volume and customer mix of our precision oncology testing;

the start and completion of projects in which our development services are utilized;

the introduction of new products or product enhancements by us or others in our industry;

coverage and reimbursement policies with respect to our products and products that compete with our products;

expenditures that we may incur to acquire, develop or commercialize additional products and technologies;

changes in governmental regulations or in the status of our regulatory approvals or applications;

future accounting pronouncements or changes in our accounting policies;

developments or disruptions in the business and operations of our clinical, commercial and other partners;

the  impact  of  natural  disasters,  political  and  economic  instability,  including  wars,  terrorism,  and  political  unrest,  epidemics  or  pandemics,  including  the
current outbreak of novel coronavirus (2019-nCoV), boycotts, curtailment of trade and other business restrictions; and

general market conditions and other factors, including factors unrelated to our operating performance or the operating performance of our competitors.

Additionally, it is difficult to predict the amount we are able to collect for our tests from commercial payers. We receive reimbursement for our tests from several
commercial payers for whom we are not a participating provider. Because we are not contracted with these payers, they determine the amount they are willing to
reimburse us for tests. We have provided testing services to patients with many cancer types and indications, most of the time as a non-participating provider
through  2019.  When  we  have  received  payment  as  a  non-participating  provider,  the  amounts,  on  average,  were  significantly  lower  than  for  participating
providers. Even when these payers have paid a claim, they may elect at any time to review previously paid claims and determine the amount they paid was too
much. In these situations, the payer will typically notify us of their decision and then offset whatever amount they determine they overpaid against amounts they
owe us on current claims. We have limited abilities to dispute these retroactive adjustments and we cannot predict when, or how often, a payer might engage in
these reviews. A significant amount of these offsets by one or more payers in any given quarter could have a material effect on our results of operations and cause
them to fall below expectations or guidance we may provide. We have sought to become a participating provider of a number of commercial payers; but that
effort may not be successful and could be time-consuming and costly. Even when we have obtained positive coverage decisions for our tests from commercial
payers and entered into agreements with them, such agreements typically are standard form contracts and may allow payers to terminate coverage on short notice,
impose significant obligations on us and create additional regulatory and compliance risks and costs for us.

As part of our reimbursement operations, we appeal denials from payers, and if successful, we receive payments from these appeals. However, due to the inherent
variability of the insurance landscape, we cannot guarantee future success of, or any payments from, appeals of reimbursement denials by payers. Historic success
and payments are not indicative of future success of and payments from such appeals.

36

The cumulative effects of factors discussed above could result in large fluctuations and unpredictability in our quarterly and annual operating results. As a result,
comparing our operating results on a period-to-period basis may not be meaningful. Investors should not rely on our past results as an indication of our future
performance.

This variability and unpredictability could also result in our failing to meet the expectations of industry or financial analysts or investors for any period. If our
revenue or operating results fall below the expectations of analysts or investors or below any guidance we may provide, or if the guidance we provide is below
the expectations of analysts or investors, the price of our common stock could decline substantially. Such a stock price decline could occur even when we have
met any previously publicly stated guidance we may provide.

New product development and commercialization involve a lengthy and complex process and we may be unable to develop or commercialize new products on
a timely basis, or at all.

We launched a CLIA-validated version of our LUNAR-1 assay for research or investigational use, depending on the proposed application of the assay. Products
from our LUNAR program have taken time and considerable resources to develop, and we may not be able to complete the development and commercialization
of  the  LUNAR  assay  or  other  products  from  our  LUNAR  program  for  clinical  use  on  a  timely  basis,  or  at  all.  There  can  be  no  assurance  that  our  LUNAR
program will produce commercial products for recurrence detection of cancer or for early detection of cancer. Before we can commercialize any new products,
we will need to expend significant funds in order to:

•

•

•

conduct substantial research and development, including validation studies and clinical trials;

further develop and scale our laboratory processes to accommodate different products; and

further develop and scale our infrastructure to be able to analyze increasingly large amounts of data.

Our product development process involves a high degree of risk, and product development efforts may fail for many reasons, including:

•

•

•

failure of the product to perform as expected, including defects and errors;

lack of validation data; or

failure to demonstrate the clinical utility of the product.

Our  development  plan  involves  using  data  and  analytical  insights  generated  from  our  current  products  as  a  force  multiplier  of  returns  on  research  and
development investment in our LUNAR program. However, if we are unable to generate additional or compatible data and insights, then we may not be able to
advance our LUNAR program as quickly, or at all, or without significant additional investment.

As  we  develop  products,  we  have  made  and  will  have  to  make  significant  investments  in  product  development,  marketing  and  selling  resources,  including
investing heavily in clinical studies, which could adversely affect our future cash flows.

Our current revenue is primarily generated from sales of our Guardant360 and GuardantOMNI tests and we are highly dependent on them for our success.

Our  ability  to  execute  our  growth  strategy  and  become  profitable  is  highly  dependent  on  the  continued  adoption  and  use  of  our  Guardant360  test  and  our
GuardantOMNI test, which accounted for almost all of our revenue in the years ended December 31, 2018 and 2019. Continued adoption and use of our tests will
depend on several factors, including the prices we charge for our tests, the scope of coverage and amount of reimbursement available from third-party payers for
our  tests,  the  availability  of  clinical  data  that  supports  the  value  of  our  tests  and  the  inclusion  of  our  tests  in  industry  treatment  guidelines.  In  addition,  many
biopharmaceutical companies have existing relationships with companies that develop molecular diagnostic tests, including our competitors, and may continue to
use their tests instead of ours. Despite our business development efforts, it could be difficult, expensive and/or time-consuming for biopharmaceutical companies
to switch diagnostic tests for their products, and our tests may not be widely accepted by biopharmaceutical companies, if at all, which could in turn hinder the
growth of sales of our tests. If we are unable to achieve commercial success for our Guardant360 and GuardantOMNI tests, our business, results of operations and
financial  condition  would  be  materially  and  adversely  affected.  We  cannot  assure  that  our  tests  will  continue  to  maintain  or  gain  market  acceptance,  and  any
failure to do so would materially harm our business and results of operations.

37

If our products, or our competitors’ liquid biopsy-based products, do not meet the expectations of patients and our customers, our operating results,
reputation and business could suffer.

Our success depends on the market’s confidence that we can provide reliable, high-quality precision oncology products that will improve clinical outcomes, lower
healthcare  costs  and  enable  better  biopharmaceutical  development.  We  believe  that  patients,  clinicians  and  biopharmaceutical  companies  are  likely  to  be
particularly sensitive to product defects and errors in the use of our products, including if our products fail to detect genomic alterations with high accuracy from
samples or if we fail to list or inaccurately include certain treatment options and available clinical trials in our test reports, and there can be no guarantee that our
products  will  meet  their  expectations.  Furthermore,  if  our  competitors’  liquid-biopsy  based  products  do  not  perform  to  expectations,  it  may  result  in  lower
confidence in liquid biopsy-based tests in general. As a result, the failure of our products or our competitors’ products to perform as expected could significantly
impair our operating results and our reputation. In addition, we may be subject to legal claims arising from any defects or errors in our products.

If we are unable to support demand for our current and future products, including ensuring that we have adequate capacity to meet increased demand, or we
are unable to successfully manage our anticipated growth, our business could suffer.

As our volume of test sales grows, we will need to continue to increase our workflow capacity for sample intake, customer service, billing and general process
improvements,  expand  our  internal  quality  assurance  program  and  extend  our  platform  to  support  comprehensive  genomic  analysis  at  a  larger  scale  within
expected turnaround times. We will need additional certified laboratory scientists and other scientific and technical personnel to process higher volumes of our
precision oncology products. Portions of our process are not automated and will require additional personnel to scale. We will also need to purchase additional
equipment, some of which can take several months or more to procure, setup and validate, and increase our software and computing capacity to meet increased
demand.  There  is  no  assurance  that  any  of  these  increases  in  scale,  expansion  of  personnel,  equipment,  software  and  computing  capacities  or  process
enhancements will be successfully implemented, if at all, or that we will have adequate space in our laboratory facility or be able to secure additional facility
space to accommodate such required expansion.

As we commercialize additional products, we will need to incorporate new equipment, implement new technology systems and laboratory processes, and hire
new personnel with different qualifications. Failure to manage this growth or transition could result in turnaround time delays, higher product costs, declining
product quality, deteriorating customer service and slower responses to competitive challenges. A failure in any one of these areas could make it difficult for us to
meet market expectations for our products and could damage our reputation and the prospects for our business.

If we cannot maintain our current relationships, or enter into new relationships, with biopharmaceutical companies, our revenue prospects could be reduced.

Biopharmaceutical  customers  collaborate  with  us  for  analysis  of  whole  blood  or  plasma  samples  for  multiple  applications  primarily  to  support  clinical  trials,
including patient identification, companion diagnostics and retrospective testing. In the years ended December 31, 2019, 2018 and 2017, revenue from our top
five biopharmaceutical customers, including their affiliated entities, accounted for 38.0%, 36.1% and 29.7% of our total revenue, respectively, with AstraZeneca
PLC, including its affiliated entities, representing 26.0%, 18.0% and 13.4% of our total revenue, respectively. The revenue attributable to our biopharmaceutical
customers may also fluctuate in the future, which could have an adverse effect on our financial condition and results of operations. In addition, the termination of
these  relationships  could  result  in  a  temporary  or  permanent  loss  of  revenue.  Adverse  speculation  about  our  existing  or  potential  relationships  with
biopharmaceutical companies may be a catalyst for adverse speculation about us, our products and our technology, which can adversely affect our reputation and
business.

38

Our  future  success  depends  in  part  on  our  ability  to  maintain  relationships  and  to  enter  into  new  relationships  with  biopharmaceutical  customers,  including
offering our platform to such customers for companion diagnostic development, novel target discovery and validation as well as clinical trial enrollment, and
growing into other business opportunities. This can be difficult due to many factors, including the type of biomarker support required and our ability to deliver it
and our biopharmaceutical customers’ satisfaction with our products or services, internal and external constraints placed on these organizations and other factors
that may be beyond our control. Furthermore, our biopharmaceutical customers may decide to decrease or discontinue their use of our current products, including
our Guardant360 test and our GuardantOMNI test, or our future products due to changes in their research and product development plans, failures in their clinical
trials, financial constraints, or utilization of internal testing resources or tests performed by other parties, or other circumstances outside of our control. Continued
usage  of  our  tests  by  particular  biopharmaceutical  customers  may  also  depend  on  whether  the  partner  obtains  positive  data  in  its  clinical  trials,  is  able  to
successfully obtain regulatory approval and subsequently commercializes a therapy for which we have partnered with them to develop a companion diagnostic, or
other administrative factors that are outside our control. Some of our biopharmaceutical customers have contracted with us to provide testing for large numbers of
samples,  which  could  strain  our  testing  capacity  and  restrict  our  ability  to  perform  tests  for  other  customers.  Furthermore,  biopharmaceutical  companies  may
decline to do business with us or decrease or discontinue their use of our tests due to their broad strategic collaboration with any of our competitors. In addition to
reducing  our  revenue,  the  loss  of  one  or  more  of  these  relationships  may  reduce  our  exposure  to  research  and  clinical  trials  that  facilitate  the  collection  and
incorporation  of  new  information  into  our  platform  and  tests.  We  engage  in  conversations  with  biopharmaceutical  companies  regarding  potential  commercial
opportunities on an ongoing basis. There is no assurance that any of these conversations will result in a commercial agreement, that the resulting relationship will
be successful, or that clinical trials conducted as part of the engagement will produce successful outcomes. If we cannot maintain our current relationships, or
enter  into  new  relationships,  with  biopharmaceutical  companies,  our  product  development  could  be  delayed  and  revenue  and  results  of  operations  could  be
adversely affected.

Our payer concentration may materially adversely affect our financial condition and results of operations.

We  receive  a  substantial  portion  of  our  revenue  from  a  limited  number  of  third-party  commercial  payers,  most  of  which  have  not  contracted  with  us  to  be  a
participating provider. If one or more of these payers were to significantly reduce, or cease to pay, the amount such payer reimburses us for tests we perform, or if
such  payer  does  not  reach  or  maintain  favorable  coverage  and  reimbursement  decisions  for  our  tests,  it  could  have  a  material  adverse  effect  on  our  business,
financial  condition  and  results  of  operations. We  have  experienced  situations  where  commercial  payers  proactively  reduced  the  amounts  they  were  willing  to
reimburse  for  our  tests,  and  in  other  situations,  commercial  payers  have  determined  that  the  amounts  they  previously  paid  were  too  high  and  have  sought  to
recover those perceived excess payments by deducting such amounts from payments otherwise being made. If commercial payers were to decide not to include us
as a participating provider, cease paying us altogether, drastically reduce the amount they were willing to pay us or attempt to recover any amounts they had
already paid, it could cause significant fluctuations in our quarterly results and could harm our business and results of operations.

In September 2018, we began to submit claims for Medicare reimbursement for Guardant360 clinical testing, and in October 2018, we began to receive payments
from Medicare. Approximately 38.0% of our U.S. clinical tests were for Medicare beneficiaries in each of the years 2019, 2018 and 2017. Revenue attributable to
Medicare accounted for more than 10% of our total revenue in the year ended December 31, 2019. Our Medicare reimbursement currently lacks the certainty
afforded  by  a  national  coverage  determination  by  CMS.  In  addition,  pursuant  to  CMS  regulations,  we  cannot  bill  Medicare  directly  for  tests  provided  for
Medicare beneficiaries in some situations. CMS adopted an exception to its laboratory date of service regulation, and if certain conditions are met, molecular
testing laboratories such as us can rely on that exception to bill Medicare directly, instead of seeking payment from the hospital. If this exception is repealed or
curtailed by CMS, or its laboratory date of service regulation is otherwise changed to adversely impact our ability to bill Medicare directly, our revenue could be
materially reduced.

If we fail to obtain or maintain coverage and adequate reimbursement from third-party payers, we may be unable to increase our testing volume and revenue as
expected. Retrospective reimbursement adjustments, such as deductions from further payments and clawbacks, can also negatively impact our revenue and cause
our financial results to fluctuate. In addition, as part of our reimbursement operations, we appeal denials from payers, and if successful, we receive payments from
these  appeals.  However,  due  to  the  inherent  variability  of  the  insurance  landscape,  we  cannot  guarantee  future  success  of,  or  any  payments  from,  appeals  of
reimbursement denials by payers. Historic success and payments are not indicative of future success of and payments from such appeals.

39

If we cannot compete successfully with our competitors, we may be unable to increase or sustain our revenue or to achieve and then sustain profitability.

Growing understanding of the importance of biomarkers linked with therapy selection and response is leading to more companies offering services in genomic
profiling.  The  promise  of  liquid  biopsy  is  also  leading  to  more  companies  attempting  to  enter  the  space  and  compete  with  us.  Our  main  competition  is  from
diagnostic companies with products and services to profile genes in cancers based on either single-marker or comprehensive genomic profile testing, based on
next-generation sequencing in either blood or tissue.

Our competitors within the liquid biopsy space include Foundation Medicine, Inc., which was acquired by Roche Holdings, Inc. in July 2018, Roche Molecular
Systems, Inc., Thermo Fisher Scientific Inc., Illumina, Inc., Personal Genome Diagnostics, Inc., Qiagen N.V. and Sysmex Inostics. In addition, GRAIL, Inc. and
Natera Inc., among others, are developing and/or commercializing tests that are competitive with our LUNAR program for early cancer detection.

Competitors  within  the  broader  genomics  profiling  space  based  on  tissue  include  laboratory  companies  such  as  Bio-Reference  Laboratories,  Inc.,  Laboratory
Corporation of America and Quest Diagnostics, Inc., as well as companies such as Foundation Medicine, Inc., Caris Life Sciences, Inc. and Myriad Genetics,
Inc., that sell molecular diagnostic tests for cancer to physicians and have or may develop tests which compete with our Guardant360 and GuardantOMNI tests.
In addition, we are aware that certain of our customers are also developing their own tests and may decide to enter our market or otherwise stop using our tests.

Some of our competitors and potential competitors may have longer operating histories; larger customer bases; greater brand recognition and market penetration;
substantially greater financial, technological and research and development resources and selling and marketing capabilities; and more experience dealing with
third-party  payers.  As  a  result,  they  may  be  able  to  respond  more  quickly  to  changes  in  customer  requirements,  devote  greater  resources  to  the  development,
promotion  and  sale  of  their  tests  than  we  do  or  sell  their  tests  at  prices  designed  to  win  significant  levels  of  market  share.  We  may  not  be  able  to  compete
effectively  against  these  organizations.  Increased  competition  and  cost-saving  initiatives  on  the  part  of  governmental  entities  and  other  third-party  payers  are
likely to result in pricing pressures, which could harm our sales, profitability or ability to gain market share. In addition, competitors may be acquired by, receive
investments from or enter into other commercial relationships with larger, well-established and well-financed companies. Certain of our competitors may be able
to secure key inputs from vendors on more favorable terms, devote greater resources to marketing and promotional campaigns, adopt more aggressive pricing
policies  and  devote  substantially  more  resources  to  product  development  than  we  can.  In  addition,  companies  or  governments  that  control  access  to  genetic
testing  through  umbrella  contracts  or  regional  preferences  could  promote  our  competitors  or  prevent  us  from  performing  certain  services.  If  we  are  unable  to
compete successfully against current and future competitors, we may be unable to increase market acceptance and sales of our tests, which could prevent us from
increasing our revenue or achieving profitability and could cause our stock price to decline.

Our competitors’ tests could include FDA-approved diagnostic kits, which can be sold to their clients. In addition to developing kits, certain diagnostic companies
also provide next-generation sequencing platforms that could be used for liquid biopsy testing. These include Illumina, Inc., Thermo Fisher Scientific Inc. and
other  companies  developing  next-generation  sequencing  platforms  that  are  sold  directly  to  biopharmaceutical  companies,  clinical  laboratories  and  research
centers. While many of the applications for these platforms are focused on research and development applications, each of these companies has launched and will
continue to commercialize products and services focused on the clinical oncology market.

Furthermore, many companies are developing information technology-based tools to support the integration of next-generation sequencing testing into the clinical
setting. These companies may also use their own tests or others to develop an integrated system which could limit access for us to certain networks.

40

The sizes of the markets for our current and future products have not been established with precision, and may be smaller than we estimate.

Our estimates of the annual total addressable markets for our current products and products under development in our LUNAR program are based on a number of
internal and third-party estimates, including, without limitation, the number of patients with late-stage, solid tumor cancer, the number of individuals who are at a
higher risk for developing cancer, and the assumed prices at which we can sell tests for markets that have not been established. While we believe our assumptions
and  the  data  underlying  our  estimates  are  reasonable,  these  assumptions  and  estimates  may  not  be  correct  and  the  conditions  supporting  our  assumptions  or
estimates may change at any time, thereby reducing the predictive accuracy of these underlying factors. As a result, our estimates of the annual total addressable
market for our current or future products may prove to be incorrect. If the actual number of patients who would benefit from our products, the price at which we
can  sell  our  products,  or  the  annual  total  addressable  market  for  our  products  is  smaller  than  we  have  estimated,  it  may  impair  our  sales  growth  and  have  an
adverse impact on our business.

The precision oncology industry is subject to rapid change, which could make our Guardant Health Oncology Platform, our current products and any future
products we may develop, obsolete.

Our industry is characterized by rapid changes, including technological and scientific breakthroughs, frequent new product introductions and enhancements and
evolving industry standards, all of which could make our current and future products obsolete. Our future success will depend on our ability to keep pace with the
evolving  needs  of  our  customers  on  a  timely  and  cost-effective  basis  and  to  pursue  new  market  opportunities  that  develop  as  a  result  of  scientific  and
technological advances. In recent years, there have been numerous advances in technologies relating to the diagnosis and treatment of cancer. There have also
been advances in methods used to analyze very large amounts of molecular information. We must continuously enhance our Guardant Health Oncology Platform
and  develop  new  products  to  keep  pace  with  evolving  standards  of  care.  If  we  do  not  update  our  product  offerings  to  reflect  new  scientific  knowledge  about
cancer biology, information about new cancer therapies or relevant clinical trials, our products could become obsolete and sales of our current products and any
new products we may develop could decline or fail to grow as expected.

We may be unable to manage our future growth effectively, which could make it difficult to execute our business strategy.

Since our inception, we have experienced rapid growth and anticipate further growth in our business operations. Our future growth could create strain on our
organizational,  administrative  and  operational  infrastructure,  including  laboratory  operations,  quality  control,  customer  service  and  sales  organization
management. We expect to continue to increase headcount and to hire more specialized personnel as we grow our business. We will need to continue to hire, train
and  manage  additional  qualified  scientists,  laboratory  personnel,  client  and  account  services  personnel,  as  well  as  sales  and  marketing  staff,  and  improve  and
maintain our technology to properly manage our growth. If our new hires perform poorly, if we are unsuccessful in hiring, training, managing and integrating
these new employees or if we are not successful in retaining our existing employees, our business may be harmed.

In addition, we may not be able to maintain the quality or expected turnaround times of our products, or satisfy customer demand as it grows, and our business
may be harmed. Our ability to manage our growth properly will also require us to continue to improve our operational, financial and management controls, as
well  as  our  reporting  systems  and  procedures.  The  time  and  resources  required  to  implement  these  new  systems  and  procedures  is  uncertain  and  could  be
demanding, and failure to complete this in a timely and efficient manner could adversely affect our operations.

We  have  limited  experience  in  marketing  and  selling  our  products,  and  if  we  are  unable  to  expand  our  sales  organization  to  adequately  address  our
customers’ needs, our business may be adversely affected.

We  have  limited  experience  in  marketing  and  selling  our  current  products,  including  our  Guardant360  and  GuardantOMNI  tests,  and  other  products  we  may
develop. We may not be able to market, sell or distribute such tests or other products we may develop effectively enough to support our planned growth. We
currently sell to clinicians in the United States through our own sales organization and to biopharmaceutical companies through our business development team.

41

Each of our target markets is large, distinctive and diverse. As a result, we believe it is necessary for our sales representatives and business development managers
to have established oncology-focused expertise. Competition for such employees within the precision oncology industry is intense. We may not be able to attract
and  retain  personnel  or  be  able  to  build  an  efficient  and  effective  sales  organization  or  business  development  team,  which  could  negatively  impact  sales  and
market acceptance of our products and limit our revenue growth and potential profitability.

Our  expected  future  growth  will  impose  significant  added  responsibilities  on  members  of  management,  including  the  need  to  identify,  recruit,  maintain  and
integrate additional employees. Our future financial performance and our ability to commercialize our products, to increase our sales and to compete effectively
will depend, in part, on our ability to manage this potential future growth effectively, without compromising quality.

Outside the United States, we established the Joint Venture with SoftBank for sales of our products throughout Asia, the Middle East and Africa. We share a
measure  of  control  of  the  Joint  Venture,  and  if  its  sales  and  marketing  efforts  for  our  products  in  those  regions  are  not  successful,  our  business  would  be
materially  and  adversely  affected.  In  other  territories,  such  as  Europe,  we  sell  our  tests  primarily  through  distributor  relationships  or  direct  contracts  with
hospitals. Locating, qualifying, engaging and maintaining relationships with distribution partners and hospitals with local industry experience and knowledge will
be  necessary  to  effectively  market  and  sell  our  products  outside  the  United  States.  We  may  not  be  successful  in  finding,  attracting  and  retaining  distribution
partners or local hospitals, or we may not be able to enter into such arrangements on favorable terms. Sales practices utilized by any such parties that are locally
acceptable  may  not  comply  with  sales  practices  standards  required  under  U.S.  laws  that  apply  to  us,  which  could  create  additional  compliance  risk.  If  our
international  sales  and  marketing  efforts  are  not  successful,  we  may  not  achieve  market  acceptance  for  our  products  outside  the  United  States,  which  would
materially and adversely impact our business.

We rely on a limited number of suppliers or, in some cases, sole suppliers, for some of our laboratory instruments and materials and may not be able to find
replacements or immediately transition to alternative suppliers.

We rely on a limited number of suppliers or, in some cases, sole suppliers, including Illumina Inc., or Illumina, for certain sequencers, reagents, blood tubes and
other equipment, instruments and materials that we use in our laboratory operations. An interruption in our laboratory operations could occur if we encounter
delays  or  difficulties  in  securing  these  laboratory  equipment,  instruments  or  materials,  and  if  we  cannot  then  obtain  an  acceptable  substitute.  Any  such
interruption could significantly and adversely affect our business, financial condition, results of operations and reputation. We rely on Illumina as the sole supplier
of  the  sequencers  and  as  the  sole  provider  of  maintenance  and  repair  services  for  these  sequencers.  Any  disruption  in  operations  of  Illumina  or  other  sole  or
limited suppliers or termination or suspension of our relationships with them could materially and adversely impact our supply chain and laboratory operations of
our precision oncology platform and thus our ability to conduct our business and generate revenue. These limited or sole suppliers could engage in diverse types
of businesses, including selling products or providing services in competition with us, and there can be no assurance that we can continue to receive required
equipment, instruments or materials from them.

We believe that there are only a limited number of other manufacturers that are capable of supplying and servicing the equipment and materials necessary for our
laboratory operations, including sequencers and various associated reagents, and potentially replacing our current suppliers. The use of equipment or materials
furnished  by  these  replacement  suppliers  would  require  us  to  alter  our  laboratory  operations.  Transitioning  to  a  new  supplier  would  be  time-consuming  and
expensive, may result in interruptions in our laboratory operations, could affect the performance specifications of our laboratory operations or could require that
we  revalidate  our  tests.  There  can  be  no  assurance  that  we  will  be  able  to  secure  alternative  equipment,  reagents  and  other  materials,  bring  such  equipment,
reagents and materials online, and revalidate our tests without experiencing interruptions in our workflow. In the case of an alternative supplier for Illumina, for
example,  there  can  be  no  assurance  that  replacement  sequencers  and  various  associated  reagents  will  be  available  or  will  meet  our  quality  control  and
performance requirements for our laboratory operations. If we should encounter delays or difficulties in securing, reconfiguring or integrating the equipment and
reagents we require for our products or in revalidating our products, our business, financial condition, results of operations and reputation could be materially and
adversely affected.

42

If our sole laboratory facility becomes damaged or inoperable or we are required to vacate our existing facility, our ability to perform our tests and pursue
our research and development efforts may be jeopardized.

We  currently  derive  the  majority  of  our  revenue  from  tests  performed  at  a  single  laboratory  facility  located  in  Redwood  City,  California.  Our  facility  and
equipment  could  be  harmed  or  rendered  inoperable  by  natural  or  man-made  disasters,  including  war,  fire,  earthquake,  power  loss,  communications  failure  or
terrorism, which may render it difficult or impossible for us to operate our Guardant Health Oncology Platform for some period of time. The inability to perform
our tests or to reduce the backlog that could develop if our facility is inoperable, for even a short period of time, may result in the loss of customers or harm to our
reputation, and we may be unable to regain those customers or repair our reputation. Furthermore, our facility and the equipment we use to perform our research
and development work could be unavailable or costly and time-consuming to repair or replace. It would be difficult, time-consuming and expensive to rebuild our
facility,  to  locate  and  qualify  a  new  facility  or  enable  a  third  party  to  practice  our  proprietary  technology,  particularly  in  light  of  licensure  and  accreditation
requirements.  Even  if  we  are  able  to  find  a  third  party  with  such  qualifications  to  perform  our  tests,  the  parties  may  be  unable  to  agree  on  commercially
reasonable terms.

We  carry  insurance  for  damage  to  our  property  and  disruption  of  our  business,  but  this  insurance  may  not  cover  all  of  the  risks  associated  with  damage  or
disruption to our facility and business, may not provide coverage in amounts sufficient to cover our potential losses and may not continue to be available to us on
acceptable terms, if at all.

The loss of any member of our senior management team or our inability to attract and retain highly skilled scientists, clinicians, sales representatives and
business development managers could adversely affect our business.

Our success depends on the skills, experience and performance of key members of our senior management team, including Helmy Eltoukhy, our Chief Executive
Officer, and AmirAli Talasaz, our President and Chief Operating Officer and the chairman of our board of directors. The individual and collective efforts of these
employees will be important as we continue to develop our platform and additional products, and as we expand our commercial activities. The loss or incapacity
of existing members of our executive management team could adversely affect our operations if we experience difficulties in hiring qualified successors. Our
executive officers signed offer letters when first joining our company, but do not have employment agreements, and we cannot guarantee their retention for any
period of time. We do not maintain “key person” insurance on any of our employees.

Our research and development programs and laboratory operations depend on our ability to attract and retain highly skilled scientists and technicians. We may not
be  able  to  attract  or  retain  qualified  scientists  and  technicians  in  the  future  due  to  the  competition  for  qualified  personnel  among  life  science  businesses,
particularly  near  our  headquarters  in  Redwood  City,  California.  We  also  face  competition  from  universities  and  public  and  private  research  institutions  in
recruiting and retaining highly qualified scientific personnel. In addition, we may have difficulties locating, recruiting or retaining qualified sales representatives
and business development managers. Recruiting and retention difficulties can limit our ability to support our research and development and sales programs. All of
our employees are at-will, which means that either we or the employee may terminate their employment at any time.

If we were to be sued for product liability or professional liability, we could face substantial liabilities that exceed our resources.

The marketing, sale and use of our products could lead to the filing of product liability claims were someone to allege that our products identified inaccurate or
incomplete information regarding the genomic alterations of the tumor or malignancy analyzed, reported inaccurate or incomplete information concerning the
available  therapies  for  a  certain  type  of  cancer,  or  otherwise  failed  to  perform  as  designed.  We  may  also  be  subject  to  professional  liability  for  errors  in,  a
misunderstanding  of,  or  inappropriate  reliance  upon,  the  information  we  provide  in  the  ordinary  course  of  our  business  activities.  A  product  liability  or
professional liability claim could result in substantial damages and be costly and time-consuming for us to defend.

We  maintain  product  and  professional  liability  insurance,  but  this  insurance  may  not  fully  protect  us  from  the  financial  impact  of  defending  against  product
liability  or  professional  liability  claims.  Any  product  liability  or  professional  liability  claim  brought  against  us,  with  or  without  merit,  could  increase  our
insurance rates or prevent us from securing insurance coverage in the future. Additionally, any product liability or professional liability lawsuit could damage our
reputation or cause current clinical customers to terminate existing agreements with us and potential clinical customers to seek other partners, any of which could
adversely impact our results of operations.

43

We are exposed to risks associated with our joint venture with SoftBank, and may not realize the advantages we expect from it.

We have a 50% ownership interest in the Joint Venture, Guardant Health AMEA, Inc., we formed with SoftBank in May 2018 to accelerate the commercialization
of our products in Asia, the Middle East and Africa, with a near-term focus on Japan. However, the Joint Venture may not be successful in the timeframe we
expect, or at all.

Additionally, SoftBank shares a measure of control over the operations of the Joint Venture. As a result, our investment in our joint venture involves risks that are
different  from  the  risks  involved  in  owning  facilities  and  operations  independently.  These  risks  include  the  possibility  that  our  joint  venture  or  SoftBank  has
economic or business interests or goals that are or become inconsistent with our economic or business interests or goals; is in a position to take action contrary to
our instructions, requests, policies or objectives; subjects us to unexpected liabilities; takes actions that reduce our return on investment; or takes actions that harm
our reputation or restrict our ability to run our business.

The joint venture agreement between us and SoftBank includes a put-call arrangement with respect to the shares of the Joint Venture held by SoftBank and its
affiliates. SoftBank will have a put right to cause us to purchase all shares of the Joint Venture held by SoftBank and its affiliates, and we will have a call right to
purchase all such shares in the event of (i) certain material disagreements relating to the Joint Venture or its business that may seriously affect the ability of the
Joint  Venture  to  perform  its  obligations  under  the  joint  venture  agreement  or  may  otherwise  seriously  impair  the  ability  of  the  Joint  Venture  to  conduct  its
business in an effective matter, other than one relating to the Joint Venture’s business plan or to factual matters that may be capable of expert determination; (ii)
the effectiveness of our initial public offering, a change in control, the seventh anniversary of the formation of the Joint Venture, or each subsequent anniversary
of each of the foregoing events; or (iii) a material breach of the joint venture agreement by the other party that goes unremedied within 20 business days. Unless
the shares of the Joint Venture are publicly traded and listed on a nationally recognized stock exchange, the purchase price per share of the Joint Venture in these
situations will be determined by a third-party valuation firm on the assumption that the sale is on an arm’s-length basis on the date of the put or call notice. The
third-party valuation firm may evaluate a range of factors and employ assumptions that are subjective in nature, which may result in the fair value of Softbank’s
interest in the Joint Venture being determined to be materially different from what has been recorded in our consolidated financial statements, including those
included elsewhere in this Annual Report on Form 10-K. We may pay the purchase price for those shares in cash (including in the form of a promissory note), in
shares of our common stock, or in a combination thereof. In the event SoftBank exercises its put right, we will choose the form of consideration. In the event we
exercise our call right, SoftBank will choose the form of consideration. If we are required or choose to purchase those shares from SoftBank, we could experience
significant cash outflow, our other stockholders could see their holdings diluted, and our financial condition and the price of our common stock may be adversely
affected.

We may acquire businesses, form joint ventures or make investments in companies or technologies that could negatively affect our operating results, distract
management’s attention from other business concerns, dilute our stockholders’ ownership, and significantly increase our debt, costs, expenses, liabilities and
risks.

We have made acquisitions of businesses, technologies and assets and may pursue additional acquisitions in the future. We also may pursue strategic alliances and
additional joint ventures that leverage our Guardant Health Oncology Platform and industry experience to expand our product offerings or distribution. We have
limited experience with acquisitions and forming strategic partnerships. We compete for those opportunities with others including our competitors, some of which
have  greater  financial  or  operational  resources  than  we  do.  We  may  not  be  able  to  identify  suitable  acquisition  candidates  or  strategic  partners,  we  may  have
inadequate access to information or insufficient time to complete due diligence, and we may not be able to complete such transactions on favorable terms, if at all.
If  we  make  any  acquisitions,  we  may  not  be  able  to  integrate  these  acquisitions  successfully  into  our  existing  business,  and  we  could  assume  unknown  or
contingent liabilities. Difficulties in assimilating acquired businesses include redeployment or loss of key employees and their severance, combination of teams
and  processes  in  various  functional  areas,  reorganization  or  closures  of  facilities,  relocation  or  disposition  of  excess  equipment,  and  increased  litigation,
regulatory  and  compliance  risks,  any  of  which  could  be  expensive  and  time  consuming  and  adversely  affect  us.  Integration  of  an  acquired  business  also  may
disrupt our ongoing operations and require management resources that we would otherwise focus on developing our existing business. In addition, any acquisition
could result in the incurrence of debt, contingent liabilities or future write-offs of intangible assets or goodwill, any of which could have a material adverse effect
on our financial condition, results of operations and cash flows. We may also experience losses related to investments in other companies, which could have a
material negative effect on our results of operations and financial condition. We may not realize the anticipated benefits of any acquisition, technology license,
strategic alliance or joint venture.

44

To  finance  any  acquisitions,  joint  ventures  or  investments,  we  may  choose  to  issue  shares  of  our  common  stock  as  consideration,  which  would  dilute  the
ownership  of  our  stockholders.  Additional  funds  may  not  be  available  on  terms  that  are  favorable  to  us,  or  at  all.  If  the  price  of  our  common  stock  is  low  or
volatile, we may not be able to acquire other companies or fund a joint venture project using our stock as consideration.

International  expansion  of  our  business  exposes  us  to  business,  regulatory,  political,  operational,  financial,  and  economic  risks  associated  with  doing
business outside of the United States.

We currently have limited international operations, but our business strategy incorporates potentially significant international expansion, including through the
Joint Venture with SoftBank, which we formed to accelerate the commercialization of our products in Asia, the Middle East and Africa, with a near-term focus on
Japan.

We  plan  to  maintain  distributor  relationships,  to  conduct  physician  and  patient  association  outreach  activities,  to  extend  laboratory  capabilities  and  to  expand
payer relationships, outside of the United States, both directly and through our joint venture. Doing business internationally involves a number of risks, including:

• multiple,  conflicting  and  changing  laws  and  regulations  such  as  privacy  regulations,  tax  laws,  export  and  import  restrictions,  economic  sanctions  and

embargoes, employment laws, regulatory requirements and other governmental approvals, permits and licenses;

•

•

•

•

•

•

•

•

•

•

•

failure by us, our distributors, our local partners or the Joint Venture with SoftBank to obtain regulatory approvals for the use of our products in various
countries;

additional potentially blocking or relevant third-party patent or other intellectual property rights;

complexities and difficulties in obtaining intellectual property protection and enforcing our intellectual property;

difficulties in staffing and managing foreign operations;

complexities associated with managing multiple payer reimbursement regimes, government payers, or patient self-pay systems;

logistics and regulations associated with shipping blood samples, including infrastructure conditions and transportation delays;

limits in our ability to penetrate international markets if we are not able to perform our tests locally;

financial  risks,  such  as  longer  payment  cycles,  difficulty  collecting  accounts  receivable,  the  impact  of  local  and  regional  financial  crises  on  demand  and
payment for our products and exposure to foreign currency exchange rate fluctuations, currency controls and cash repatriation restrictions;

natural  disasters,  political  and  economic  instability,  including  wars,  terrorism,  and  political  unrest,  boycotts,  curtailment  of  trade  and  other  business
restrictions;

public  health  or  similar  issues,  such  as  epidemics  or  pandemics,  including  the  current  outbreak  of  novel  coronavirus  (2019-nCoV),  for  which  the  World
Health  Organization  declared  a  global  emergency  on  January  30,  2020,  that  could  cause  business  disruption  for  the  Joint  Venture,  including  the  Joint
Venture’s  offices  in  Japan  and  Singapore,  and  make  it  more  difficult  to  sell  our  tests  in  the  affected  countries  or  regions,  many  of  which  are  in  the  JV
Territory, and

regulatory  and  compliance  risks  that  relate  to  maintaining  accurate  information  and  control  over  sales  and  distributors’  activities  that  may  fall  within  the
purview of the U.S. Foreign Corrupt Practices Act, or FCPA, its books and records provisions, or its anti-bribery provisions.

Any of these factors could significantly harm our future international expansion and operations and, consequently, our revenue and results of operations.

45

We could be adversely affected by violations of the FCPA and other anti-bribery laws.

International customers may currently order our Guardant360 and GuardantOMNI tests, either directly from us or through the Joint Venture with SoftBank, and
we are subject to the FCPA, which prohibits companies and their intermediaries from making payments in violation of law to non-U.S. government officials for
the purpose of obtaining or retaining business or securing any other improper advantage. Our reliance on independent distributors to sell our Guardant360 and
GuardantOMNI  tests  internationally  demands  a  high  degree  of  vigilance  in  maintaining  our  policy  against  participation  in  corrupt  activity,  because  these
distributors  could  be  deemed  to  be  our  agents  and  we  could  be  held  responsible  for  their  actions.  Other  U.S.  companies  in  the  medical  device  and
biopharmaceutical field have faced criminal penalties under the FCPA for allowing their agents to deviate from appropriate practices in doing business with these
individuals. We are also subject to similar anti-bribery laws in the jurisdictions in which we operate, including the United Kingdom’s Bribery Act of 2010, which
also prohibits commercial bribery and makes it a crime for companies to fail to prevent bribery. These laws are complex and far-reaching in nature, and, as a
result, we cannot assure that we would not be required in the future to alter one or more of our practices to be in compliance with these laws or any changes in
these  laws  or  the  interpretation  thereof.  Any  violations  of  these  laws,  or  allegations  of  such  violations,  could  disrupt  our  operations,  involve  significant
management distraction, cause us to incur significant costs and expenses, including legal fees, and result in a material adverse effect on our business, prospects,
financial  condition  and  results  of  operations.  We  could  also  suffer  severe  penalties,  including  criminal  and  civil  penalties,  disgorgement  and  other  remedial
measures.

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

We are exposed to the risk of fraud or other misconduct by our employees, principal investigators, consultants and commercial partners. Misconduct by these
parties could include intentional failures to comply with the regulations of the FDA, CMS and non-U.S. regulators, comply with healthcare fraud and abuse laws
and  regulations  in  the  United  States  and  abroad,  report  financial  information  or  data  accurately  or  disclose  unauthorized  activities  to  us.  In  particular,  sales,
marketing, and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, misconduct, kickbacks,
self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales
commission, customer incentive programs and other business arrangements. Such misconduct could also involve the improper use of information obtained in the
course of clinical studies, which could result in regulatory sanctions and cause serious harm to our reputation. We currently have a code of conduct applicable to
all of our employees, but it is not always possible to identify and deter employee misconduct, and our code of conduct and the other precautions we take to detect
and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses, or in protecting us from governmental investigations, lawsuits
or  other  actions  stemming  from  a  failure  to  comply  with  these  laws  or  regulations.  If  any  such  actions  are  instituted  against  us,  and  we  are  not  successful  in
defending  ourselves  or  asserting  our  rights,  those  actions  could  result  in  the  imposition  of  significant  civil,  criminal  and  administrative  penalties,  including,
without limitation, damages, monetary fines, individual imprisonment, disgorgement of profits, possible exclusion from participation in Medicare, Medicaid and
other  federal  healthcare  programs  or  from  coverage  of  commercial  payers,  contractual  damages,  reputational  harm,  diminished  profits  and  future  earnings,
additional reporting or oversight obligations if we become subject to a corporate integrity agreement or other agreement to resolve allegations of non-compliance
with  the  law  and  curtailment  or  restructuring  of  our  operations,  which  could  have  a  significantly  adverse  impact  on  our  business.  Whether  or  not  we  are
successful in defending against such actions, we could incur substantial costs and expenses, including legal fees, and divert the attention of management from the
operation of our business.

We may need to raise additional capital to fund our existing operations, develop our platform, commercialize new products or expand our operations.

Based on our current business plan, we believe our current cash, cash equivalents and marketable securities and anticipated cash flow from operations, will be
sufficient to meet our anticipated cash requirements over at least the next 12 months from the date of this Annual Report on Form 10-K. If our available cash
balances  and  anticipated  cash  flow  from  operations  are  insufficient  to  satisfy  our  liquidity  requirements  including  because  of  lower  demand  for  our  products,
lower than currently expected rates of reimbursement from commercial third-party payers and government payers or other risks described in this Annual Report
on Form 10-K, we may seek to sell equity or convertible securities, enter into a credit facility or another form of third-party funding, or seek other debt financing.

46

We may consider raising additional capital in the future to expand our business, to meet existing obligations, to pursue acquisitions or strategic investments, to
take advantage of financing opportunities or for other reasons, including to:

•

•

•

•

•

•

increase our sales and marketing efforts to drive market adoption of our current products, including our Guardant360 and GuardantOMNI tests, and address
competitive developments;

fund development and marketing efforts of products from our LUNAR program or any other future products we may develop;

expand our technologies into other types of cancer management and detection products;

acquire, license or invest in technologies;

acquire or invest in complementary businesses or assets; and

finance capital expenditures and general and administrative expenses.

Our present and future funding requirements will depend on many factors, including:

•

•

•

•

•

•

•

•

our ability to achieve revenue growth;

our  rate  of  progress  in  establishing  payer  coverage  and  reimbursement  arrangements  with  domestic  and  international  commercial  payers  and  government
payers;

the cost of expanding our laboratory operations and product offerings, including our sales and marketing efforts;

our rate of progress in, and costs of our sales and marketing activities associated with, establishing adoption of and reimbursement for our current products,
including our Guardant360 and GuardantOMNI tests;

our rate of progress in, and costs of our research and development activities associated with, products in research and early development;

the effect of competing technological and market developments;

costs related to our international expansion; and

the potential costs of and delays in product development as a result of any existing or new regulatory oversight applicable to our products.

The various ways we could raise additional capital carry potential risks. If we raise funds by issuing equity or convertible securities, dilution to our stockholders
could result. Any preferred equity securities issued also could provide for rights, preferences or privileges senior to those of holders of our common stock. If we
raise funds by issuing debt securities, those debt securities would have rights, preferences and privileges senior to those of holders of our common stock. The
terms of debt securities issued or borrowings pursuant to a credit agreement could impose significant restrictions on our operations. If we raise funds through
collaborations  and  licensing  arrangements,  we  might  be  required  to  relinquish  significant  rights  to  our  platform  technologies  or  products  or  grant  licenses  on
terms that are not favorable to us. These alternatives of raising additional capital may not be available to us on acceptable or commercially reasonable terms, if at
all, or in amounts sufficient to meet our needs. The failure to obtain any required future financing may require us to reduce or curtail existing operations and
could contribute to negative market perceptions about us or our securities.

We are dependent on third parties for the collection of blood samples for our tests.

We rely on third-party phlebotomy providers, including physician offices, to collect blood samples for our tests. Our current third-party phlebotomy providers
may refuse to continue to collect samples for us in the future, in particular if they have agreements or arrangements with one of our competitors to collect samples
for  their  tests,  or  if  the  phlebotomy  provider  is  owned  or  controlled  by  a  laboratory  that  offers  tests  that  compete  with  ours.  There  has  been  a  trend  towards
consolidation of independent phlebotomy providers. Independent phlebotomy providers, once acquired by our competitors, may terminate their relationships with
us. If our patients are unable to readily access a phlebotomy provider to collect a blood sample for our tests, we may be unable to compete effectively with other
laboratories that have greater access to phlebotomy providers and our business, financial condition and results of operations may be harmed.

47

In addition, if third-party phlebotomy providers fail to adequately and properly obtain and collect viable blood samples from patients and to properly package and
ship the samples to us, our patients and their physicians may experience problems and delays in receiving test results, which could lead to dissatisfaction with our
tests, therefore harming our reputation and adversely affecting our business, financial condition and results of operations. Similarly, our contracts with third-party
phlebotomy providers to collect blood could be scrutinized under federal and state healthcare laws such as the federal Anti-Kickback Statute, or AKS, and the
federal law prohibiting physician self-referral, or Stark Law, to the extent these services to us are deemed to provide a financial benefit to or relieve a financial
burden for a potential referral source, or are subsequently found not to be for fair market value. If our operations are found to be in violation of any of these laws
and  regulations,  we  may  be  subject  to  administrative,  civil  and  criminal  penalties,  damages,  fines,  individual  imprisonment,  exclusion  from  participation  in
federal healthcare programs or from coverage of commercial payers, refunding of payments received by us, and curtailment or cessation of our operations, any of
which could harm our reputation and adversely affect our business, financial condition and results of operations.

We  rely  on  commercial  courier  delivery  services  to  transport  samples  to  our  laboratory  facility  in  a  timely  and  cost-efficient  manner  and  if  these  delivery
services are disrupted, our business will be harmed.

Our business depends on our ability to quickly and reliably deliver test results to our customers. Blood samples are typically received within days from the United
States and outside the United States for analysis at our Redwood City, California facility. Disruptions in delivery services to transport samples to that facility,
whether  due  to  labor  disruptions,  bad  weather,  natural  disaster,  terrorist  acts  or  threats  or  for  other  reasons  could  adversely  affect  specimen  integrity  and  our
ability to process samples in a timely manner, delay our provision of test results to our customers, and ultimately our reputation and our business. In addition, if
we  are  unable  to  continue  to  obtain  expedited  delivery  services  to  transport  samples  to  us  on  commercially  reasonable  terms,  our  operating  results  may  be
adversely affected.

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

We have incurred net losses since our inception and we may never achieve or sustain profitability. Generally, losses incurred will carry forward until such losses
expire (for losses generated prior to January 1, 2018) or are used to offset future taxable income, if any. Under Sections 382 and 383 of the Internal Revenue Code
of 1986, as amended, or the IRC, if a corporation undergoes an “ownership change,” generally defined as a greater than 50 percentage point change (by value) in
its equity ownership by certain stockholders over a three-year period, the corporation’s ability to use its pre-change net operating loss, or NOL, carryforwards and
other pre-change tax attributes (such as research tax credits) to offset its post-change income or taxes may be limited. We have not completed a study to assess
whether an ownership change for purposes of Section 382 or 383 has occurred, or whether there have been multiple ownership changes since our inception. For
purposes of Section 382 or 383, we may have experienced ownership changes in the past and may experience ownership changes in the future as a result of shifts
in  our  stock  ownership  (some  of  which  shifts  are  outside  our  control).  As  a  result,  if  we  earn  net  taxable  income,  our  ability  to  use  our  pre-change  NOL
carryforwards to offset such taxable income will be subject to limitations. Similar provisions of state tax law may also apply to limit our use of accumulated state
tax attributes. Therefore, if we attain profitability, we may be unable to use a material portion of our NOL carryforwards and other tax attributes, which could
adversely  affect  our  future  cash  flows.  In  addition,  the  Tax  Cuts  and  Jobs  Act  of  2017  imposes  a  reduction  to  the  maximum  deduction  allowed  for  NOLs
generated in tax years beginning after December 31, 2017, but allow such NOLs to be carried forward indefinitely. These changes may adversely affect our future
cash flow.

We depend on information technology systems, and any failure of these systems could harm our business.

We  depend  on  information  technology  and  telecommunications  systems  for  significant  elements  of  our  operations,  including  our  laboratory  information
management  system,  our  computational  biology  system,  our  knowledge  management  system,  our  customer  reporting  and  our  GuardantConnect  software
platform. We have installed, and expect to expand, a number of enterprise software systems that affect a broad range of business processes and functional areas,
including for example, systems handling human resources, financial controls and reporting, contract management, regulatory compliance and other infrastructure
operations. In addition to the aforementioned business systems, we intend to extend the capabilities of both our preventative and detective security controls by
augmenting the monitoring and alerting functions, the network design and the automatic countermeasure operations of our technical systems. These information
technology  and  telecommunications  systems  support  a  variety  of  functions,  including  laboratory  operations,  test  validation,  sample  tracking,  quality  control,
customer service support, billing and reimbursement, research and development activities, scientific and medical curation and general administrative activities. In
addition,  our  third-party  provider  of  billing  and  collections  services  for  late-stage  clinical  testing  in  the  United  States  depends  upon  technology  and
telecommunications systems provided by its outside vendors.

48

Information technology and telecommunications systems are vulnerable to damage from a variety of sources, including telecommunications or network failures,
malicious human acts and natural disasters. Moreover, despite network security and back-up measures, some of our servers are potentially vulnerable to physical
or  electronic  break-ins,  computer  viruses  and  similar  disruptive  problems.  For  example,  in  the  past  year,  we  identified  security  incidents  involving  an
unauthorized actor obtaining access to our email system and sending phishing messages. Despite the precautionary measures we have taken in response to such
incidents  and  to  prevent  other  unanticipated  problems  that  could  affect  our  information  technology  and  telecommunications  systems,  failures  or  significant
downtime of our information technology or telecommunications systems or those used by our third-party service providers could prevent us from performing our
comprehensive  genomic  analysis,  preparing  and  providing  reports  to  pathologists  and  oncologists,  billing  payers,  processing  reimbursement  appeals,  handling
patient or physician inquiries, conducting research and development activities and managing the administrative aspects of our business. Any disruption or loss of
information technology or telecommunications systems on which critical aspects of our operations depend could have an adverse effect on our business and our
reputation, and we may be unable to regain or repair our reputation.

Despite the security and maintenance measures we and our vendors and distributors have in place to help protect against system failures, our systems, and those
of our vendors and distributors, remain vulnerable to delays, disruptions, data corruption, programming and/or human errors or other similar events, such as those
due to system updates, natural disasters, malicious attacks, accidents, power disruptions, telecommunications failures, acts of terrorism or war, computer viruses,
physical or electronic break-ins or similar events. Such incidents may disrupt our operations, result in losses, damage our reputation, and expose us to the risks of
litigation and liability (including regulatory liability); and may have a material adverse effect on our business, results of operations and financial condition.

Risks related to our highly regulated industry

We conduct business in a heavily regulated industry, and changes in regulations or violations of regulations may, directly or indirectly, reduce our revenue,
adversely affect our results of operations and financial condition, and harm our business.

The clinical laboratory testing industry is highly regulated, and there can be no assurance that the regulatory environment in which we operate will not change
significantly and adversely to us in the future. Areas of the regulatory environment that may affect our ability to conduct business include, without limitation:

•

•

•

•

•

•

•

•

•

•

federal and state laws applicable to test ordering, documentation of tests ordered, billing practices and claims payment and/or regulatory agencies enforcing
those laws and regulations;

federal and state health care fraud and abuse laws;

federal and state laboratory anti-mark-up laws;

coverage and reimbursement levels by Medicare, Medicaid, other governmental payers and private insurers;

restrictions on coverage of and reimbursement for tests;

federal and state laws governing laboratory testing, including CLIA, and state licensing laws;

federal  and  state  laws  and  enforcement  policies  governing  the  development,  use  and  distribution  of  diagnostic  medical  devices,  including  laboratory
developed tests, or LDTs;

federal, state and local laws governing the handling and disposal of medical and hazardous waste;

federal and state Occupational Safety and Health Administration rules and regulations; and

the Health Insurance Portability and Accountability Act of 1996, or HIPAA, and similar state data privacy and security laws.

In particular, the laws and regulations governing the marketing of clinical laboratory tests are extremely complex, and in many instances, there are no sufficient
regulatory  or  judicial  interpretations  of  these  laws  and  regulations.  For  example,  some  of  our  clinical  laboratory  tests  are,  or  may  in  the  future  be,  actively
regulated by the FDA pursuant to the medical device provisions of the Federal Food, Drug and Cosmetic Act, or FDCA. The FDA defines a medical device to
include

49

Table of Contents

any instrument, apparatus, implement, machine, contrivance, implant, in vitro reagent or other similar or related article, including a component, part or accessory,
intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment or prevention of disease, in man or other animals. Our clinical
laboratory  tests  are  in  vitro  diagnostic  products  that  are  considered  by  the  FDA  to  be  medical  devices.  Among  other  things,  pursuant  to  the  FDCA  and  its
implementing  regulations,  the  FDA  regulates  the  research,  design,  testing,  manufacturing,  safety,  labeling,  storage,  recordkeeping,  premarket  clearance  or
approval, marketing and promotion and sales and distribution of medical devices in the United States to ensure that medical devices distributed domestically are
safe and effective for their intended uses. In addition, the FDA regulates the import and export of medical devices. If we do not comply with these requirements
or later become subject to these requirements and fail to adequately comply, our business may be harmed.

Certain of our tests are currently marketed as LDTs, and future changes in FDA enforcement discretion for LDTs could subject our operations to much more
significant regulatory requirements.

The  FDA  has  a  policy  of  enforcement  discretion  with  respect  to  LDTs  whereby  the  FDA  does  not  actively  enforce  its  regulatory  requirements  for  such  tests.
However, the FDA has stated its intention to modify its enforcement discretion policy with respect to LDTs. If there are changes in FDA policy, or if the FDA
disagrees  that  we  are  marketing  our  tests  as  LDTs  within  the  scope  of  its  policy  of  enforcement  discretion,  we  may  become  subject  to  extensive  regulatory
requirements and may be required to stop selling our existing tests or launching any other tests we may develop and to conduct additional clinical trials or take
other actions prior to continuing to market our tests. This could significantly increase the costs and expenses of conducting, or otherwise harm, our business.

We currently market our Guardant360 test as an LDT and may in the future market our other tests as LDTs. While we believe that we are currently in material
compliance  with  applicable  laws  and  regulations  as  historically  enforced  by  the  FDA,  we  cannot  assure  that  the  FDA  will  agree  with  our  determination.  A
determination that we have violated these laws and regulations, or a public announcement that we are being investigated for possible violations, could adversely
affect our business, prospects, results of operations and financial condition.

On  July  31,  2014,  the  FDA  notified  Congress  of  its  intent  to  modify,  in  a  risk-based  manner,  its  policy  of  enforcement  discretion  with  respect  to  LDTs.  On
October  3,  2014,  FDA  issued  two  draft  guidances,  entitled  “Framework  for  Regulatory  Oversight  of  Laboratory  Developed  Tests  (LDTs),”  or  the  Framework
Guidance,  and  “FDA  Notification  and  Medical  Device  Reporting  for  Laboratory  Developed  Tests  (LDTs).”  The  Framework  Guidance  stated  that  the  FDA
intended to modify its policy of enforcement discretion with respect to LDTs in a risk-based manner consistent with the existing classification of medical devices.
Thus, pursuant to the Framework Guidance, the FDA planned to begin to enforce its medical device requirements, including premarket submission requirements,
on LDTs that have historically been marketed without FDA premarket review and oversight. Although the FDA halted finalization of the guidance in November
2016 to allow for further public discussion on an appropriate oversight approach to LDTs and to give congressional authorizing committees the opportunity to
develop a legislative solution, the FDA could ultimately modify its current approach to LDTs in a way that would subject our products marketed as LDTs to the
enforcement of regulatory requirements. If and when such changes to the regulatory framework occur, we could for the first time be subject to enforcement of
regulatory requirements as a device manufacturer such as registration and listing requirements, medical device reporting requirements and the requirements of the
FDA’s Quality System Regulation. Additionally, if and when the FDA begins to actively enforce its premarket submission regulations with respect to LDTs, we
may be required to obtain premarket clearance or approval for our Guardant360 test and other products we plan to commercialize as LDTs. Moreover, legislative
measures have recently been proposed in Congress that, if ultimately enacted, could provide the FDA with additional authority to require premarket review of and
regulate LDTs.

50

Table of Contents

There  is  no  guarantee  that  the  FDA  will  grant  510(k)  clearance  or  a  premarket  approval  of  our  products  and  failure  to  obtain  necessary  clearances  or
approvals for our products would adversely affect our ability to grow our business.

Before we begin to label and market our products for use as clinical diagnostics in the United States, including as companion diagnostics, we may be required to
obtain either 510(k) clearance or a premarket approval, or PMA, from the FDA, unless an exemption applies or FDA exercises its enforcement discretion and
refrains from enforcing its medical device requirements. For example, the FDA has a policy of refraining from enforcing such requirements with respect to LDTs,
which the FDA considers to be a type of in vitro diagnostic test that is designed, manufactured and used within a single laboratory. Although we currently market
Guardant360 test as an LDT pursuant to FDA’s policy of enforcement discretion, we could pursue clearances or approvals from the FDA for our Guardant360 and
other tests, including future products we may develop. For example, in the fourth quarter of 2019, we submitted a premarket approval, or PMA, application to
seek  the  FDA’s  approval  of  our  Guardant360  test  to  be  used  as  a  companion  diagnostic,  initially  in  connection  with  one  therapeutic  product  of  a
biopharmaceutical customer, and to provide tumor mutation profiling for cancer patients with solid tumors. In February 2020, we submitted an additional module
of the PMA application for our Guardant360 test to the FDA.

The process of obtaining a PMA is much more rigorous, costly, lengthy and uncertain than the 510(k) clearance process. In the PMA process, the FDA must
determine that a proposed device is safe and effective for its intended use based, in part, on extensive data, including, but not limited to, technical, pre-clinical,
clinical trial, manufacturing and labeling data. In the 510(k) clearance process, the FDA must determine that a proposed device is “substantially equivalent” to a
device legally on the market, known as a “predicate” device, in order to clear the proposed device for marketing. To be “substantially equivalent,” the proposed
device must have the same intended use as the predicate device, and either have the same technological characteristics as the predicate device or have different
technological characteristics and not raise different questions of safety or effectiveness than the predicate device. Clinical data is sometimes required to support a
substantial equivalence determination.

The FDA’s 510(k) clearance process usually takes from three to twelve months from submission, but may last longer. The process of obtaining a PMA generally
takes  from  one  to  three  years,  or  even  longer,  from  the  time  the  PMA  is  submitted  to  the  FDA  until  an  approval  is  obtained.  Any  delay  or  failure  to  obtain
necessary regulatory approvals or clearances would have a material adverse effect on our business, prospects, financial condition and results of operations.

The FDA can delay, limit or deny clearance or approval of a device for many reasons, including:

•

•

•

•

•

•

•

•

•

our inability to demonstrate to the satisfaction of the FDA that our products are safe or effective for their intended uses;

the disagreement of the FDA with the design, conduct or implementation of our clinical trials or the analysis or interpretation of data from our pre-clinical
studies or clinical trials;

serious and unexpected adverse effects experienced by participants in our clinical trials;

the data from our pre-clinical studies and clinical trials may be insufficient to support clearance or approval, where required;

our inability to demonstrate that the clinical and other benefits of any of our tests outweigh the risks;

an advisory committee, if convened by the FDA, may recommend against approval of our PMA or other application for any of our tests or may recommend
that  the  FDA  require,  as  a  condition  of  approval,  additional  pre-clinical  studies  or  clinical  trials,  limitations  on  approved  labeling  or  distribution  and  use
restrictions, or even if an advisory committee, if convened, makes a favorable recommendation, the FDA may still not approve the test;

the FDA may identify deficiencies in our marketing application, and in our manufacturing processes, facilities or analytical methods or those of our third-
party contract manufacturers;

the potential for approval policies or regulations of the FDA to change significantly in a manner rendering our clinical data or regulatory filings insufficient
for the clearance or approval; and

the FDA may audit our clinical trial data and conclude that the data is not sufficiently reliable to support a PMA application.

51

Table of Contents

If we are unable to obtain clearance or approval for any tests for which we plan to seek clearance or approval, our business may be harmed.

Modifications to our FDA-cleared or approved products may require new 510(k) clearances or premarket approvals, or may require us to cease marketing or
recall the modified products until clearances are obtained.

For any product approved pursuant to a PMA, we are required to seek supplemental approval for many types of changes to the approved product, for which we
will  need  to  determine  whether  a  PMA  supplement  or  other  regulatory  filing  is  needed  or  whether  the  change  may  be  reported  via  the  PMA  Annual  Report.
Similarly,  any  modification  to  a  510(k)-cleared  device  that  could  significantly  affect  its  safety  or  effectiveness,  or  that  would  constitute  a  major  change  in  its
intended use, design, or manufacture, requires new 510(k) clearance or, possibly, approval of a new PMA. The FDA requires us to make this determination in the
first instance, but the FDA may review and may not agree with our determination. If the FDA disagrees with our determination and requires us to seek approvals
or clearances for modifications to our previously approved or cleared products, for which we concluded that new approvals or clearances are unnecessary, we
may be required to cease marketing or distribution of our products or to recall the modified product until we obtain the approval or clearance, and we may be
subject to significant regulatory fines or penalties.

If third-party payers, including commercial payers and government healthcare programs, do not provide coverage of, or adequate reimbursement for, our
tests, our business and results of operations will be negatively affected.

Our  revenue  and  commercial  success  depend  on  achieving  broad  coverage  and  reimbursement  for  our  tests  from  payers,  including  both  commercial  and
government payers. If payers do not provide coverage of, or do not provide adequate reimbursement for, a substantial portion of our tests, we may need to seek
payment from the patient, which may adversely affect demand for our tests. Coverage determinations by a payer may depend on a number of factors, including
but  not  limited  to  a  payer’s  determination  that  a  test  is  appropriate,  medically  necessary  or  cost-effective.  If  we  are  unable  to  provide  payers  with  sufficient
evidence  of  the  clinical  utility  and  validity  of  our  test,  they  may  not  provide  coverage,  may  provide  limited  coverage  or  may  terminate  coverage,  which  will
adversely  affect  our  revenues  and  our  financial  condition.  To  the  extent  that  more  competitors  enter  our  markets,  the  availability  of  coverage  and  the
reimbursement rate for our tests may decrease as we encounter pricing pressure from our competitors.

Each payer makes its own decision as to whether to provide coverage for our tests, whether to enter into a contract with us and how much it will reimburse for a
test.  Negotiating  with  payers  could  be  a  time-consuming  and  costly  process,  and  payers  often  insist  on  their  standard  form  contracts,  which  typically  contain
requirements that apply to ordering physicians. There is no guarantee that a payer will provide adequate coverage or reimbursement for our tests or that we can
reach an agreement with the payer on reasonable terms without being subject to additional regulatory and compliance risks. In addition, the determination by a
payer to cover or not cover our tests and the amount it will reimburse for them are often made on an indication-by-indication basis. In cases where there is no
coverage, or we do not have a contracted rate for reimbursement as a participating provider, with the payer, the patient is typically responsible for a greater share
of  the  cost  of  the  test,  which  may  result  in  further  delay  of  our  revenue,  increase  our  collection  costs  or  decrease  the  likelihood  of  collection.  We  maintain  a
financial assistance program, the Guardant Access Fee Assistance Program, under which we provide tests without charge or at a significant discount to certain
patients meeting income based eligibility standards. This may result in payers requiring us to prove eligibility of such patients to pay no or reduced test fees, and
if  the  payers  disagree  with  such  eligibility,  they  may  recoup  amounts  previously  paid  for  such  tests,  terminate  coverage  or  seek  to  renegotiate  the  rate  for
reimbursement.

Our claims for reimbursement from payers may be denied upon submission, and we may need to take additional steps to receive payment, such as appealing the
denials.  Such  appeals  and  other  processes  are  time-consuming  and  expensive  and  may  not  result  in  payment.  Payers  may  perform  audits  of  historically  paid
claims and attempt to recoup funds years after the funds were initially distributed if the payers believe the funds were paid in error or determine that our tests
were medically unnecessary. If a payer audits our claims and issues a negative audit finding, and we are not able to overturn the audit findings through appeal, the
subsequent  recoupment  may  result  in  a  material  adverse  effect  on  our  revenue.  Additionally,  in  some  cases  commercial  payers  for  whom  we  are  not  a
participating provider may elect at any time to review claims previously paid and determine the amount they paid was excessive. In these situations, the payer
typically  notifies  us  of  its  decision  and  then  offsets  the  amount  it  determines  to  be  overpaid  against  amounts  it  owes  us  on  current  claims.  We  do  not  have  a
mechanism to dispute these retroactive adjustments, and we cannot predict when, or how often, a payer might engage in these reviews.

52

Table of Contents

When we contract with a payer to serve as a participating provider, reimbursements by the payer are generally made pursuant to a negotiated fee schedule and are
limited to only covered indications or where prior approval has been obtained. Becoming a participating provider can result in higher reimbursement amounts for
covered uses of our test and, potentially, no reimbursement for non-covered uses identified under the payer’s policies or the contract. As a result, the potential for
more favorable reimbursement associated with becoming a participating provider may be offset by a potential loss of reimbursement for non-covered uses of our
tests.

Although we are a participating provider with some commercial payers, including Cigna, Priority Health, multiple Blue Cross Blue Shield regional plans as well
as the health plans associated with eviCore, certain large, national commercial payers, including Anthem, Aetna and Humana, have issued non-coverage policies
that treat both tissue and liquid CGP testing, including our Guardant360 test, as experimental or investigational. If we are not successful in obtaining coverage
from such payers, including in reversing their existing non-coverage policies, or if other payers issue similar non-coverage policies, our business and results of
operations could be materially and adversely affected.

Medicare’s National Coverage Determination, or NCD, for Next Generation Sequencing, or NGS, established in 2018 and subsequently updated in 2020 states
that NGS tests, such as our Guardant360 test, are covered by Medicare nationally, when: (1) performed in a CLIA-certified laboratory, (2) ordered by a treating
physician, (3) the patient meets certain clinical and treatment criteria, including having recurrent, relapsed, refractory, metastatic, or advanced stages III or IV
cancer, (4) the test is approved or cleared by the FDA as a companion in vitro diagnostic for an FDA approved or cleared indication for use in that patient’s
cancer, and (5) results are provided to the treating physician for management of the patient using a report template to specify treatment options. The NGS NCD
also states that each Medicare Administrative Contractor, or MAC, may provide local coverage of other next-generation sequencing tests for cancer patients only
when the test is performed by a CLIA-certified laboratory, ordered by a treating physician and the patient meets the same clinical and treatment criteria required
of  nationally  covered  next-generation  sequencing  tests  under  the  NGS  NCD.  An  NGS  test  is  not  covered  by  Medicare  when  cancer  patients  do  not  have  the
above-noted  indications  for  cancer  under  either  national  or  local  coverage  criteria.  In  July  2018,  Palmetto  GBA,  the  MAC  responsible  for  administering
Medicare’s Molecular Diagnostic Services Program, or MolDx, issued a local coverage determination, or LCD, for our Guardant360 test for non-small cell lung
cancer,  or  NSCLC,  patients  who  meet  certain  clinical  and  treatment  criteria.  Noridian  Healthcare  Solutions,  the  MAC  responsible  for  adjudicating  claims  in
California, where our laboratory is located, and a participant in MolDx, recently finalized its LCD for our Guardant360 test. Pursuant to this Noridian LCD, in
September 2018, we began to submit claims to Medicare for reimbursement for Guardant360 clinical testing performed for NSCLC patients covered under the
LCD who meet certain clinical criteria, and in October 2018, we began to receive payments for these services from Medicare for these clinical tests. In December
2019, replacing its prior NSCLC patient LCD, Palmetto GBA finalized a new LCD for our Guardant360 test that provides limited Medicare coverage for the
Guardant360 test in patients diagnosed with solid cancers of non-central nervous system origin. We expect Noridian Healthcare Solutions to issue a new LCD for
our Guardant360 test equivalent to the new LCD issued by Palmetto GBA, though the timing and scope of the Noridian LCD are uncertain. We may not be able
to obtain reimbursement under the expanded Noridian LCD until it is finalized and Noridian completes certain administrative steps.

Under Medicare, payment for laboratory tests like ours is generally made under the Clinical Laboratory Fee Schedule, or CLFS, with payment amounts assigned
to specific procedure billing codes. In April 2014, Congress passed the Protecting Access to Medicare Act of 2014, or PAMA, which included substantial changes
to the way in which clinical laboratory services are paid under Medicare. Under PAMA, laboratories that receive the majority of their Medicare revenue from
payments made under the CLFS are generally required to report to CMS, beginning in 2017 and every three years thereafter (or annually for “advanced diagnostic
laboratory tests”), private payer payment rates and volumes for each test they perform. CMS uses this data to calculate a weighted median payment rate for each
test, which is used to establish revised Medicare CLFS reimbursement rates for the test. Laboratories that fail to report the required payment information may be
subject to substantial civil monetary penalties. As we have begun billing Medicare for our tests, we are subject to reporting requirements under PAMA and the
Medicare rate for our tests will be calculated in the future based on our private payer rates. For clinical diagnostic laboratory tests furnished on or after January 1,
2018,  their  Medicare  CLFS  reimbursement  rates  are  established  upon  these  reported  private  payer  rates.  If  we  are  unable  to  obtain  and  maintain  favorable
reimbursement rates from commercial payers for our tests, this may adversely affect the tests’ Medicare reimbursement rates. We believe that our tests do not
meet the current definition of advanced diagnostic laboratory tests, and we will be required to report private payer rates for our tests every three years; but this
determination may change. It is unclear what impact new Medicare pricing structures, such as those adopted under PAMA, may have on our business, financial
condition, results of operations or cash flows.

The U.S. federal government continues to show significant interest in pursuing health care reform and reducing health care costs. Similarly, private payers may
seek to reduce costs by reducing coverage or reimbursement for our tests.

53

Table of Contents

Any government-adopted reform measures or changes to commercial payer coverage and policies could cause significant pricing pressure on reimbursement for
health care products and services, including our tests, which could decrease demand for our tests, and adversely affect our sales, revenue and financial condition.

Some  payers  have  implemented,  or  are  in  the  process  of  implementing,  laboratory  benefit  management  programs,  often  using  third-party  benefit  managers  to
manage these programs. The stated goals of these programs are to help improve the quality of outpatient laboratory services, support evidence-based guidelines
for patient care and lower costs. The impact on laboratories, such as us, of active laboratory benefit management by third parties is unclear, and we expect that it
would  have  a  negative  impact  on  our  revenue  in  the  short  term.  Payers  may  resist  reimbursement  for  our  tests  in  favor  of  less  expensive  tests,  require  pre-
authorization for our tests, or impose additional pricing pressure on and substantial administrative burden for reimbursement for our tests. We expect to continue
to focus substantial resources on increasing adoption of, and coverage and reimbursement for, our current tests and any future tests we may develop. We believe it
may take several years to achieve broad coverage and adequate contracted reimbursement with a majority of payers for our tests. However, we cannot predict
whether, under what circumstances, or at what price levels payers will cover and reimburse our tests. If we fail to establish and maintain broad adoption of, and
coverage and reimbursement for, our tests, our ability to generate revenue could be harmed and our business and prospects could suffer.

Our  products  may  in  the  future  be  subject  to  product  recalls.  A  recall  of  our  products,  either  voluntarily  or  at  the  direction  of  the  FDA  or  another
governmental authority, or the discovery of serious safety issues with our products, could have a significant adverse impact on us.

The FDA has the authority to require the recall of commercialized products that are subject to FDA regulation in the event of material deficiencies or defects in
design or manufacture. The authority to require a recall must be based on an FDA finding that there is reasonable probability that the device would cause serious,
adverse health consequences or death. We may also, on our own initiative, recall a product. The FDA requires that certain classifications of recalls be reported to
the FDA within ten working days after the recall is initiated. If we obtain FDA approval for one of our tests, a government-mandated or voluntary recall by us or
one of our distributors could occur as a result of an unacceptable risk to health, component failures, malfunctions, manufacturing errors, design or labeling defects
or other deficiencies and issues. Recalls of any of our products could divert managerial and financial resources and impair our ability to produce our products in a
cost-effective  and  timely  manner  in  order  to  meet  our  customers’  demands,  which  would  have  an  adverse  effect  on  our  reputation,  results  of  operations  and
financial condition. We may be subject to liability claims, may be required to bear costs or may take other actions that may have a negative impact on our future
sales and our ability to generate profits. Companies are required to maintain certain records of recalls, even if they are not reportable to the FDA. We may initiate
voluntary recalls involving our products in the future that we determine do not require notification of the FDA. If the FDA disagrees with our determinations, the
FDA could require us to report those actions and take enforcement action for failing to report the recalls when they were conducted. A future recall announcement
could harm our reputation with customers and negatively affect our sales and financial condition.

If we initiate a correction or removal for one of our tests, issue a safety alert or undertake a field action or recall to reduce a risk to health imposed by the test, this
could lead to increased scrutiny by the FDA and our customers regarding the quality and safety of our tests and to negative publicity, including FDA alerts, press
releases or administrative or judicial actions. Furthermore, circulation of any such negative publicity could harm our reputation, be used by competitors against us
in competitive situations and cause customers to delay purchase decisions or cancel orders.

54

Table of Contents

Clinical development involves a lengthy and expensive process with an uncertain outcome, and results of earlier studies and trials may not be predictive of
future trial results.

Our ongoing research and development and clinical trial activities are subject to extensive regulation and review by numerous governmental authorities both in
the United States and abroad. We are currently conducting pre-and post-market clinical studies of some of our tests. In the future we may conduct clinical trials to
support  approvals  of  new  products.  The  commencement  of  clinical  trials  may  be  delayed  due  to  insufficient  patient  enrollment,  which  is  a  function  of  many
factors, including the size of the patient population, the nature of the protocol, the proximity of patients to clinical sites and the trial eligibility criteria. Clinical
studies may need to be conducted in compliance with FDA regulations or the FDA may take enforcement action. The data collected from these clinical studies
may ultimately be used to support marketing authorization for these products. Even if our clinical trials are completed as planned, we cannot be certain that their
results will support our marketing claims or that the FDA or foreign authorities will agree with our conclusions regarding them. Success in pre-clinical studies
and early clinical trials does not ensure that later clinical trials will be successful, and we cannot be sure that the later trials will replicate the results of prior trials
and  studies.  The  clinical  trial  process  may  fail  to  demonstrate  that  our  tests  are  safe  and  effective  for  the  proposed  indicated  uses,  which  could  cause  us  to
abandon or delay development of our tests. Any delay or termination of our clinical trials will delay the filing of our marketing applications. Many of the factors
that may cause or lead to a delay in the commencement or completion of clinical trials may also ultimately lead to delay or denial of regulatory clearance or
approval, and any such event may render us unable to commercialize our tests and generate revenue.

We may find it necessary to engage contract research organizations to perform data collection and analysis and other aspects of our clinical trials, which might
increase the cost and complexity of our trials. We may also depend on clinical investigators, medical institutions and contract research organizations to perform
the trials, and would control only certain aspects of their activities. Nevertheless, we would be responsible for ensuring that each of our trials is conducted in
accordance with the applicable protocol, legal, regulatory and scientific standards, and our reliance on these third parties would not relieve us of our regulatory
responsibilities. We and our third-party contractors are required to comply with good clinical practices, or GCPs, which are regulations and guidelines enforced
by  the  FDA,  and  comparable  regulations  enforced  by  foreign  regulatory  authorities  for  products  in  clinical  development.  Regulatory  authorities  enforce  these
GCPs  through  periodic  inspections  of  trial  sponsors,  principal  investigators  and  trial  sites.  If  we  or  any  third-party  contractor  fails  to  comply  with  applicable
GCPs, the clinical data generated in clinical trials may be deemed unreliable and the FDA or comparable foreign regulatory authorities may require us to perform
additional  clinical  trials  before  clearing  or  approving  our  marketing  applications.  A  failure  to  comply  with  these  regulations  may  require  us  to  repeat  clinical
trials,  which  would  delay  the  regulatory  clearance  or  approval  process.  In  addition,  if  these  parties  do  not  successfully  carry  out  their  contractual  duties  or
obligations or meet expected deadlines, or if the quality, completeness or accuracy of the clinical data they obtain is compromised due to the failure to adhere to
our clinical protocols or for other reasons, our clinical trials may have to be extended, delayed or terminated.

Many of these factors would be beyond our control. We may not be able to undertake additional trials, repeat trials or enter into new arrangements with third
parties without undue delays or considerable expenditures. If there are delays in testing or clearances or approvals as a result of the failure to perform by third
parties, our research and development costs would increase, and we may not be able to obtain regulatory clearance or approval for our tests. In addition, we may
not be able to establish or maintain relationships with these parties on favorable terms, if at all. Each of these outcomes would harm our ability to market our
tests, generate revenue or to achieve sustained profitability.

Our “research use only” and “investigational use only” products could become subject to more onerous regulation by the FDA or other regulatory agencies
in the future, which could increase our costs and delay our commercialization efforts, thereby materially and adversely affecting our business and results of
operations.

In the United States, our GuardantOMNI test and our LUNAR-1 assay are currently available for research use only, or RUO, or for investigational use only, or
IUO, depending on the proposed application. We make our RUO and IUO products available to a variety of parties, including biopharmaceutical companies and
research institutes. Because RUO and IUO products are not intended for use in clinical practice and cannot be advertised or promoted for clinical or diagnostic
claims, they are exempt from many regulatory requirements otherwise applicable to medical devices. In particular, while the FDA regulations require that RUO
products  be  labeled  “For  Research  Use  Only.  Not  for  use  in  diagnostic  procedures,”  and  that  IUO  products  be  labeled  “For  Investigational  Use  Only.  The
performance  characteristics  of  this  product  have  not  been  established,”  such  products  are  not  subject  to  the  FDA’s  pre-  and  post-market  controls  for  medical
devices.

55

Table of Contents

A significant change in the laws governing RUO or IUO products or how they are enforced may require us to change our business model in order to maintain
compliance. For instance, in November 2013 the FDA issued a guidance document entitled “Distribution of In Vitro Diagnostic Products Labeled for Research
Use Only or Investigational Use Only,” or the RUO/IUO Guidance, which highlights the FDA’s interpretation that distribution of RUO or IUO products with any
labeling, advertising or promotion that suggests that clinical laboratories can validate the test through their own procedures and subsequently offer it for clinical
diagnostic use as an LDT is in conflict with the RUO or IUO status. The RUO/IUO Guidance further articulates the FDA’s position that any assistance offered in
performing clinical validation or verification, or similar specialized technical support, to clinical laboratories, is in conflict with RUO or IUO status. If we engage
in any activities that the FDA deems to be in conflict with the RUO or IUO status held by any of our products so labeled, we may be subject to immediate, severe
and broad FDA enforcement action that would adversely affect our ability to continue operations. Accordingly, if the FDA finds that we are distributing our RUO
or  IUO  products  in  a  manner  that  is  inconsistent  with  its  RUO/IUO  Guidance,  we  may  be  forced  to  stop  distribution  of  our  RUO/IUO  tests  until  we  are  in
compliance, which would reduce our revenue, increase our costs and adversely affect our business, prospects, results of operations and financial condition. In the
event that the FDA requires, or we apply for, marketing authorization of our RUO or IUO products in the future, there can be no assurance that the FDA will
grant any clearance or approval requested by us in a timely manner, or at all.

Even if we receive regulatory approval of our current products, including our Guardant360 and GuardantOMNI tests, or any of our other products, we will
continue to be subject to extensive regulatory oversight.

Medical devices are subject to extensive regulation by the FDA in the United States and by regulatory agencies in other territories where we do business. If any of
our  products  are  approved  by  the  FDA  or  other  regulatory  agencies,  we  will  be  required  to  timely  file  various  reports.  If  these  reports  are  not  filed  timely,
regulators may impose sanctions and sales of our products may suffer, and we may be subject to product liability or regulatory enforcement actions, all of which
could harm our business. In addition, as a condition of approving a PMA application, the FDA may also require some form of post-approval study or post-market
surveillance, whereby the applicant conducts a follow-up study or follows certain patient groups for a number of years and makes periodic reports to the FDA on
the clinical status of those patients when necessary to protect the public health or to provide additional safety and effectiveness data for the device. The product
labeling  must  be  updated  and  submitted  in  a  PMA  supplement  as  results,  including  any  adverse  event  data  from  the  post-approval  study,  become  available.
Failure to conduct or timely complete post-approval studies in compliance with applicable regulations, update the product labeling, or comply with other post-
approval requirements could result in withdrawal of approval of the PMA, which would harm our business and revenue.

The FDA and the Federal Trade Commission, or FTC, also regulate the advertising and promotion of medical devices to ensure that their promotional claims
made are consistent with the applicable marketing authorizations, that there are adequate and reasonable data to substantiate the claims, and that the promotional
labeling and advertising is neither false nor misleading in any respect. If the FDA or FTC determines that any of our promotional claims are false, misleading, not
substantiated or not permissible, we may be subject to enforcement actions and we may be required to revise our promotional claims and make other corrections
or restitutions.

The  FDA,  state  and  foreign  authorities  have  broad  enforcement  powers.  Our  failure  to  comply  with  applicable  regulatory  requirements  could  result  in
enforcement action by the FDA, state or foreign regulatory agencies, which may include any of the following sanctions:

•

•

•

•

•

•

•

adverse publicity, warning letters, untitled letters, fines, injunctions, consent decrees and civil penalties;

repair, replacement, refunds, recalls, termination of distribution, administrative detention or seizures of our products;

operating restrictions, partial suspension or total shutdown of production;

customer notifications or repair, replacement or refunds;

refusing our requests for clearances or approvals of new products, new intended uses or modifications to existing products;

withdrawals of current clearances or approvals, resulting in prohibitions on sales of our products;

refusal to issue certificates needed to export products for sale in other countries; and

56

Table of Contents

•

criminal prosecution.

Any of these sanctions could also result in higher than anticipated costs or lower than anticipated sales of our products and have a material adverse effect on our
reputation, business, results of operations and financial condition.

In addition, the FDA may change its clearance and approval policies, adopt additional regulations or revise existing regulations, or take other actions which may
prevent  or  delay  approval  or  clearance  of  our  current  or  future  products  under  development.  For  example,  in  November  2018,  FDA  officials  announced
forthcoming steps that the FDA intends to take to modernize the premarket notification pathway under Section 510(k) of the FDCA.

Among  other  things,  the  FDA  announced  that  it  planned  to  develop  proposals  to  drive  manufacturers  utilizing  the  510(k)  pathway  toward  the  use  of  newer
predicates. These proposals included plans to potentially sunset certain older devices that were used as predicates under the 510(k) clearance pathway, and to
potentially publish a list of devices that have been cleared on the basis of demonstrated substantial equivalence to predicate devices that are more than 10 years
old. In May 2019, the FDA solicited public feedback on these proposals. The FDA requested public feedback on whether it should consider certain actions that
might require new authority, such as whether to sunset certain older devices that were used as predicates under the 510(k) clearance pathway. These proposals
have not yet been finalized or adopted, and the FDA may work with Congress to implement such proposals through legislation. Accordingly, it is unclear the
extent to which any proposals, if adopted, could impose additional regulatory requirements on us that could delay our ability to obtain new 510(k) clearances,
increase the costs of compliance, or restrict our ability to maintain our current clearances, or otherwise create competition that may negatively affect our business.

More  recently,  in  September  2019,  the  FDA  finalized  guidance  describing  an  optional  “safety  and  performance  based”  premarket  review  pathway  for
manufacturers of “certain, well-understood device types” to demonstrate substantial equivalence under the 510(k) clearance pathway by showing that such device
meets objective safety and performance criteria established by the FDA, thereby obviating the need for manufacturers to compare the safety and performance of
their  medical  devices  to  specific  predicate  devices  in  the  clearance  process.  The  FDA  intends  to  develop  and  maintain  a  list  device  types  appropriate  for  the
“safety and performance based” pathway and will continue to develop product-specific guidance documents that identify the performance criteria for each such
device type, as well as the testing methods recommended in the guidance documents, where feasible. The FDA may establish performance criteria for classes of
devices  for  which  we  or  our  competitors  seek  or  currently  have  received  clearance,  and  it  is  unclear  the  extent  to  which  such  performance  standards,  if
established, could impact our ability to obtain new 510(k) clearances or otherwise create competition that may negatively affect our business.

In addition, FDA regulations and guidance are often revised or reinterpreted by the FDA in ways that may significantly affect our business and our products. Any
new statutes, regulations or revisions or reinterpretations of existing regulations may impose additional costs or lengthen review times of our current or future
products or make it more difficult to obtain clearance or approval for, manufacture, market or distribute our products. We cannot determine what effect changes in
regulations, statutes, legal interpretation or policies, when and if promulgated, enacted or adopted may have on our business in the future. Such changes could,
among other things, require: additional testing prior to obtaining clearance or approval; changes to manufacturing methods; recall, replacement or discontinuance
of our products; or additional record keeping.

The FDA’s and other regulatory authorities’ policies may change and additional government regulations may be promulgated that could prevent, limit or delay
regulatory clearance or approval of our product candidates.

We also cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative or executive action, either
in  the  United  States  or  abroad.  For  example,  certain  policies  of  the  Trump  administration  may  impact  our  business  and  industry.  In  particular,  the  Trump
administration has taken several executive actions, including the issuance of a number of executive orders, that could impose significant burdens on, or otherwise
materially delay, the FDA’s ability to engage in regulatory and oversight activities such as implementing statutes through rulemaking, issuance of guidance and
review and approval of marketing applications. It is difficult to predict how these executive actions, will be implemented, and the extent to which they will affect
the  FDA’s  ability  to  exercise  its  regulatory  authority.  If  these  executive  actions  impose  constraints  on  the  FDA’s  ability  to  engage  in  regulatory  and  oversight
activities, including approving our applications, in the normal course, our business may be negatively impacted.

57

Table of Contents

Failure  to  comply  with  federal,  state  and  foreign  laboratory  licensing  requirements  and  the  applicable  requirements  of  the  FDA  or  any  other  regulatory
authority,  could  cause  us  to  lose  the  ability  to  perform  our  tests,  experience  disruptions  to  our  business,  or  become  subject  to  administrative  or  judicial
sanctions.

We are subject to the Clinical Laboratory Improvement Amendments, or CLIA, a federal law that regulates clinical laboratories that perform testing on specimens
derived from humans for the purpose of providing information for the diagnosis, prevention or treatment of disease. CLIA regulations establish specific standards
with  respect  to  personnel  qualifications,  facility  administration,  proficiency  testing,  quality  control,  quality  assurance  and  inspections.  Any  testing  subject  to
CLIA  regulation  must  be  performed  in  a  CLIA  certified  laboratory.  CLIA  certification  is  also  required  in  order  for  us  to  be  eligible  to  bill  state  and  federal
healthcare programs, as well as commercial payers, for our tests. We have a current CLIA certificate to perform our tests at our laboratory in Redwood City,
California. To maintain this certificate, we are subject to survey and inspection every two years. Moreover, CLIA inspectors may make random inspections of our
laboratory from time to time.

We are also required to maintain a California clinical laboratory license to perform testing in California. California laboratory laws establish standards for day-to-
day operation of our clinical laboratory in Redwood City, California, including the training and skills required of personnel and quality control. In addition, some
other states require our California laboratory to be licensed in the state in order to test specimens from those states. In addition to California, our laboratory is
licensed in Florida, Maryland, Pennsylvania, Rhode Island and New York. Although we have obtained licenses from states where we believe we are required to
be licensed, it is possible that other states we are not aware of currently require out-of-state laboratories to obtain licensure in order to test specimens from the
state, and that other states may adopt similar requirements in the future.

We  may  also  be  subject  to  regulations  in  foreign  jurisdictions  as  we  seek  to  expand  international  utilization  of  our  tests  or  as  such  jurisdictions  adopt  new
licensure  requirements,  which  may  require  review  of  our  tests  in  order  to  offer  them  or  may  have  other  limitations  such  as  restrictions  on  the  transport  of
specimens  necessary  for  us  to  perform  our  tests  that  may  limit  our  ability  to  make  our  tests  available  outside  of  the  United  States.  Complying  with  licensure
requirements in new jurisdictions may be expensive, time-consuming and subject us to significant and unanticipated delays.

Failure  to  comply  with  applicable  clinical  laboratory  licensure  requirements  may  result  in  a  range  of  enforcement  actions,  including  suspension,  limitation  or
revocation of our CLIA certificate and/or state licenses, imposition of a directed plan of action, on-site monitoring, civil monetary penalties, criminal sanctions,
inability to receive reimbursement from Medicare, Medicaid and commercial payers, as well as significant adverse publicity. Any sanction imposed under CLIA,
its implementing regulations, or state or foreign laws or regulations governing clinical laboratory licensure or our failure to renew our CLIA certificate, a state or
foreign license or accreditation, could have a material adverse effect on our business, financial condition and results of operations. Even if we were able to bring
our laboratory back into compliance, we could incur significant expenses and potentially lose revenue in doing so.

In order to test specimens from New York, LDTs must be approved by the New York State Department of Health, or NYSDOH, on a product-by-product basis
before they are offered, and our Guardant360 test has been approved by NYSDOH. We will need to seek NYSDOH approval of any future LDTs we develop and
want to offer for clinical testing to New York residents, and there can be no assurance that we will be able to obtain such approval. As a result, we are subject to
periodic inspection by the NYSDOH and are required to demonstrate ongoing compliance with NYSDOH regulations and standards. To the extent NYSDOH
identified  any  non-compliance  and  we  are  unable  to  implement  satisfactory  corrective  actions  to  remedy  such  non-compliance,  the  State  of  New  York  could
withdraw approval for our tests.

The College of American Pathologists, or CAP, maintains a clinical laboratory accreditation program. While not required to operate a CLIA-certified laboratory,
many private insurers require CAP accreditation as a condition to contracting with clinical laboratories to cover their tests. In addition, some countries outside the
United States require CAP accreditation as a condition to permitting clinical laboratories to test samples taken from their citizens. In 2014, we obtained CAP
accreditation  for  our  Redwood  City,  California  laboratory,  and  in  order  to  maintain  such  accreditation,  we  are  subject  to  survey  for  compliance  with  CAP
standards every two years. Failure to maintain CAP accreditation could have a material adverse effect on the sales of our tests and the results of our operations.

58

Table of Contents

We are subject to numerous federal and state healthcare statutes and regulations; complying with such laws pertaining to our business is an expensive and
time-consuming  process,  and  any  failure  to  comply  could  result  in  substantial  penalties  and  a  material  adverse  effect  to  our  business  and  results  of
operations.

Our operations are subject to other extensive federal, state, local and foreign laws and regulations, all of which are subject to change. These laws and regulations
may include, among others:

•

•

•

•

•

the AKS, which prohibits knowingly and willfully offering, paying, soliciting or receiving remuneration, directly or indirectly, overtly or covertly, in cash or
in kind (e.g. provision of free or discounted goods, services or items), in return for or to induce such person to refer an individual, or to purchase, lease, order,
arrange  for  or  recommend  purchasing,  leasing  or  ordering,  any  good,  facility,  item  or  service  that  is  reimbursable,  in  whole  or  in  part,  under  a  federal
healthcare  program.  The  term  ‘‘remuneration’’  has  been  broadly  interpreted  to  include  anything  of  value,  such  as  phlebotomy  kits.  Although  there  are  a
number  of  statutory  exceptions  and  regulatory  safe  harbors  protecting  certain  common  activities  from  prosecution  or  other  regulatory  sanctions,  the
exceptions  and  safe  harbors  are  drawn  narrowly,  and  practices  that  involve  remuneration  that  are  alleged  to  be  intended  to  induce  referrals,  purchases  or
recommendations of covered items or services 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 AKS. Instead, the
legality of the arrangement will be evaluated on a case-by-case basis based on a cumulative review of all its facts and circumstances. Several courts have held
that if any one purpose of an arrangement involving remuneration is to induce referrals of federal healthcare covered business, the AKS has been violated.
Moreover, 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  significant  civil  monetary  penalties,  plus  up  to  three  times  the  remuneration  involved.  Violations  of  the  AKS  may  also  result  in
criminal penalties, including additional fines and imprisonment of up to ten years, and exclusion from Medicare, Medicaid or other governmental healthcare
programs;

the EKRA, which prohibits knowingly and willfully soliciting or receiving any remuneration (including any kickback, bribe or rebate) directly or indirectly,
overtly or covertly, in cash or in kind, in return for referring a patient or patronage to a laboratory; or paying or offering any remuneration (including any
kickback, bribe or rebate) directly or indirectly, overtly or covertly, in cash or in kind, to induce a referral of an individual to a laboratory or in exchange for
an individual using the services of that laboratory. The EKRA applies to all payers including commercial payers and government payers. Violations of EKRA
are subject to significant fines and/or up to 10 years in jail, separate and apart from existing AKS regulations and penalties;

the  Stark  Law,  which  prohibits  a  physician  from  making  a  referral  for  certain  designated  health  services  covered  by  the  Medicare  or  Medicaid  program,
including laboratory and pathology services, if the physician or an immediate family member of the physician has a financial relationship with the entity
providing the designated health services and prohibits that entity from billing, presenting or causing to be presented a claim for the designated health services
furnished pursuant to the prohibited referral, unless an exception applies. Sanctions for violating the Stark Law include denial of payment, significant civil
monetary penalties (on a per claim basis and additional penalties for a circumvention scheme), and exclusion from the federal health care programs;

the  federal  Civil  Monetary  Penalties  Law,  which  prohibits,  among  other  things,  the  offering  or  transfer  of  remuneration  to  a  Medicare  or  state  healthcare
program beneficiary if the person knows or should know it is likely to influence the beneficiary’s selection of a particular provider, practitioner or supplier of
services reimbursable by Medicare or a state healthcare program, unless an exception applies. Violations can result in significant civil monetary penalties for
each wrongful act;

federal  and  state  “Anti-Markup”  rules,  which,  among  other  things,  typically  prohibit  a  physician  or  supplier  billing  for  clinical  or  diagnostic  tests  (with
certain exceptions) from marking up the price of a purchased test performed by another physician or supplier that does not “share a practice” with the billing
physician or supplier;

59

Table of Contents

•

•

•

•

•

•

•

the federal Physician Payments Sunshine Act, which requires certain manufacturers of drugs, biologicals, and kits, medical devices or supplies that require
premarket approval by or notification to the FDA, and for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program
to report annually to CMS, information related to (i) payments and other transfers of value to physicians, certain other health care professionals beginning in
2022, and teaching hospitals, and (ii) ownership and investment interests in such manufacturers held by physicians and their immediate family members.
Failure to submit required information may result in significant civil monetary penalties for any payments, transfers of value or ownership or investment
interests that are not timely, accurately, and completely reported in an annual submission, and may result in liability under other federal laws or regulations;

the  federal  government  may  bring  a  lawsuit  under  the  False  Claims  Act,  or  the  FCA,  against  any  party  whom  it  believes  has  knowingly  or  recklessly
presented, or caused to be presented, a false or fraudulent request for payment from the federal government, or who has made a false statement or used a false
record to get a claim for payment approved. The federal government and a number of courts have taken the position that claims presented in violation of
certain  other  statutes,  including  the  AKS  or  the  Stark  Law,  can  also  be  considered  a  violation  of  the  FCA  based  on  the  theory  that  a  provider  impliedly
certifies  compliance  with  all  applicable  laws,  regulations,  and  other  rules  when  submitting  claims  for  reimbursement.  An  FCA  violation  may  provide  the
basis  for  the  imposition  of  administrative  penalties  as  well  as  exclusion  from  participation  in  governmental  healthcare  programs,  including  Medicare  and
Medicaid.  A  number  of  states  including  California  have  enacted  laws  that  are  similar  to  the  federal  FCA.  Private  individuals  can  bring  FCA  “qui  tam”
actions, on behalf of the government and such individuals, commonly known as “whistleblowers,” may share in amounts paid by the entity to the government
in fines or settlement. When an entity is determined to have violated the FCA, the government may impose civil fines and penalties for each false claim, plus
treble damages, and exclude the entity from participation in federal healthcare programs;

the  HIPAA  fraud  and  abuse  provisions,  which  created  federal  criminal  statutes  that  prohibit,  among  other  things,  knowingly  and  willfully  executing,  or
attempting to execute, a scheme to defraud any healthcare benefit program, including private insurers, knowingly and willfully embezzling or stealing from a
healthcare  benefit  program,  willfully  obstructing  a  criminal  investigation  of  a  healthcare  offense,  and  knowingly  and  willfully  falsifying,  concealing  or
covering up 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. 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;

federal and state laws related to, among other things, unlawful schemes to defraud, excessive fees for services, unlawful trade practices, insurance fraud,
kickbacks,  patient  inducement  and  statutory  or  common  law  fraud  restrict  the  provision  of  products,  services  or  items  for  free  or  at  reduced  charge  to
government  or  non-government  healthcare  program  beneficiaries.  These  laws  and  regulations  relating  to  the  provision  of  items  or  services  for  free  are
complex and are subject to interpretation by the courts and by government agencies;

other  federal  and  state  fraud  and  abuse  laws,  such  as  state  anti-kickback,  self-referrals,  false  claims  and  anti-markup  laws,  any  of  which  may  extend  to
services reimbursable by any payer, including private insurers;

state  laws  that  prohibit  other  specified  practices,  such  as  billing  physicians  for  tests  that  they  order;  providing  tests  at  no  or  discounted  cost  to  induce
adoption; waiving co-insurance, co-payments, deductibles or other amounts owed by patients; billing a state healthcare program at a price that is higher than
what is charged to other payers; or employing, exercising control over or splitting fees with licensed medical professionals; and

similar foreign laws and regulations in the countries in which we operate or may operate in the future.

As  a  clinical  laboratory,  our  business  practices  may  face  additional  scrutiny  from  various  government  agencies  such  as  the  Department  of  Justice,  the  U.S.
Department  of  Health  and  Human  Services  Office  of  Inspector  General,  or  OIG,  and  CMS.  Certain  arrangements  between  clinical  laboratories  and  referring
physicians have been identified in fraud alerts issued by the OIG as implicating the AKS. The OIG has stated that it is particularly concerned about these types of
arrangements because the choice of laboratory and the decision to order laboratory tests typically are made or strongly influenced by the physician, with little or
no patient input. Moreover, the provision of payments or other items of value by a clinical laboratory to a referral source could be prohibited under the Stark Law
unless the arrangement meets all criteria of an exception. The government has been active in enforcement of these laws against clinical laboratories.

60

Table of Contents

Numerous states have enacted laws prohibiting business corporations, such as us, from practicing medicine and from employing or engaging physicians and other
medical professionals (generally referred to as the prohibition against the corporate practice of medicine), which could include physician laboratory directors.
These  laws  are  designed  to  prevent  interference  in  the  medical  decision-making  process  by  anyone  who  is  not  a  licensed  medical  professional.  For  example,
California’s  Medical  Board  has  indicated  that  determining  the  appropriate  diagnostic  tests  for  a  particular  condition  and  taking  responsibility  for  the  ultimate
overall care of a patient, including making treatment options available to the patient, would constitute the unlicensed practice of medicine if performed by an
unlicensed person. Violation of these laws may result in sanctions and civil or criminal penalties. It is possible that governmental authorities may conclude that
our business practices, including our consulting and advisory board arrangements with physicians and other healthcare providers, some of whom receive stock or
stock options as compensation for services provided, do not comply with current or future corporate practice of medicine statutes, regulations, agency guidance or
case law.

The growth and international expansion of our business may increase the potential of violating applicable laws and regulations. The risk is further increased by
the fact that many such laws and regulations have not been fully interpreted by the regulatory authorities or the courts, and their provisions are open to a variety
of interpretations. Efforts to ensure that our internal operations and business arrangements with third parties comply with applicable laws and regulations will
involve substantial costs. Any action brought against us for violation of these or other laws or regulations, even if we successfully defend against it, could cause
us  to  incur  significant  legal  expenses  and  divert  our  management’s  attention  from  the  operation  of  our  business.  Any  of  the  foregoing  consequences  could
seriously harm our business and our financial results. To the extent our business operations are found to be in violation of any of these laws or regulations, we
may  be  subject  to  significant  civil,  criminal  and  administrative  penalties,  including,  without  limitation,  damages,  monetary  fines,  individual  imprisonment,
disgorgement  of  profits,  possible  exclusion  from  participation  in  Medicare,  Medicaid  and  other  healthcare  programs,  contractual  damages,  reputational  harm,
diminished profits and future earnings, additional reporting or oversight obligations if we become subject to a corporate integrity agreement or other agreement to
resolve allegations of non-compliance with the law and curtailment or restructuring of our operations, any of which could adversely affect our ability to operate
our business and pursue our strategy. If any of the healthcare providers or other parties with whom we interact or may interact in the future, are found not to be in
compliance with applicable laws and regulations, they may be subject to criminal, civil or administrative sanctions, including exclusions from participation in
various healthcare programs, which could also negatively affect our business or revenue.

If  the  validity  of  an  informed  consent  from  patients  regarding  our  test  was  challenged,  we  could  be  forced  to  stop  offering  our  products  or  using  our
resources, our business and results of operations would be negatively affected.

We offer our tests to physicians and to biopharmaceutical companies in connection with clinical trials. We have implemented measures to ensure that data and
biological samples that we receive have been collected from subjects who have provided appropriate informed consent. We also act as a sponsor of clinical trials
in  connection  with  the  development  of  our  tests,  which  are  frequently  conducted  in  collaboration  with  different  parties.  We  seek  to  receive  approval  from  an
ethical review board, or institutional review board, or IRB, for projects that meet the definition of “human subjects research,” which includes review and approval
of  processes  for  subject  informed  consent  and  authorization  for  use  of  personal  information  or  waivers  thereof.  We  and  our  biopharmaceutical  partners  could
conduct clinical trials in a number of different countries. When we are acting as a vendor in connection with a clinical trial sponsored by our biopharmaceutical
partners, we rely upon them to comply with the requirements to obtain the subject’s informed consent and to comply with applicable laws and regulations. The
collection of data and samples in many different countries results in complex legal questions regarding the adequacy of informed consent and the status of genetic
material under a large number of different legal systems. Those informed consents could be challenged and prove invalid, unlawful, or otherwise inadequate for
our  purposes.  Any  such  findings  against  us,  or  our  biopharmaceutical  partners,  could  force  us  to  stop  accessing  or  using  data  and  samples  or  servicing  or
conducting clinical trials, which would hinder our product offerings or development. We could also become involved in legal actions, which could consume our
management and financial resources.

We may be subject to fines, penalties, licensure requirements, or legal liability, if it is determined that through our test reports we are practicing medicine
without a license.

61

Table of Contents

Our test reports delivered to physicians provide information regarding FDA-approved therapies and clinical trials that oncologists may use in making treatment
decisions for their patients. We make members of our organization available to discuss the information provided in the reports. Certain state laws prohibit the
practice of medicine without a license. Our customer service representatives and medical affairs team provide support to our customers, including assistance in
interpreting the test report results. A governmental authority or other parties could allege that the identification of available therapies and clinical trials in our
reports and the related customer service we provide constitute the practice of medicine. A state may seek to have us discontinue the inclusion of certain aspects of
our test reports or the related services we provide, or subject us to fines, penalties, or licensure requirements. Any determination that we are practicing medicine
without a license may result in significant liability to us, and our business and reputation would be harmed.

Our  billing  and  claim  processing  are  complex  and  time-consuming,  and  any  delay  in  submitting  claims  or  failure  to  comply  with  applicable  billing
requirements could hinder collection and have an adverse effect on our revenue.

Billing  for  our  tests  is  complex,  time-consuming  and  expensive.  Depending  on  the  billing  arrangement  and  applicable  law,  we  bill  various  payers,  such  as
Medicare,  Medicaid,  health  plans,  insurance  companies  and  patients,  all  of  which  may  have  different  billing  requirements.  Several  factors  make  the  billing
process complex, including:

•

•

•

•

•

•

•

differences between the list prices for our tests and the reimbursement rates of payers;

compliance with complex federal and state regulations related to billing government healthcare programs, including Medicare and Medicaid, to the extent our
tests are covered by such programs;

differences in coverage among payers and the effect of patient co-payments or co-insurance;

differences in information, pre-authorization and other billing requirements among payers;

changes to codes and coding instructions governing our tests;

incorrect or missing billing information; and

the resources required to manage the billing and claim appeals process.

These billing complexities and the related uncertainty in obtaining payment for our tests could negatively affect our revenue and cash flow, our ability to achieve
profitability and the consistency and comparability of our results of operations. In addition, if claims for our tests are not submitted to payers on a timely basis, or
if we fail to comply with applicable billing requirements, it could have an adverse effect on our revenue and our business.

In addition, the coding procedure used by third-party payers to identify various procedures, including our test, during the billing process is complex, does not
adapt well to our tests and may not enable coverage and adequate reimbursement rates. Third-party payers usually require us to identify the test for which we are
seeking reimbursement using a Current Procedural Terminology, or the CPT code. CPT coding plays a significant role in how our Guardant360 test is reimbursed
both from commercial and governmental payers. The CPT code set is maintained by the American Medical Association, or AMA. In cases where there is not a
specific CPT code to describe a test, such as Guardant360 test, the test may be billed under an unlisted molecular pathology procedure code or through the use of
a combination of single gene CPT codes, depending on the payer. The Protecting Access to Medicare Act, or PAMA authorized the adoption of new, temporary
billing codes and unique test identifiers for FDA-cleared or approved tests as well as advanced diagnostic laboratory tests. The AMA has created a new section of
CPT codes, Proprietary Laboratory Analyses codes, to facilitate implementation of this section of PAMA. In addition, CMS maintains the Healthcare Common
Procedure  Coding  System,  or  HCPCS,  and  may  assign  unique  level  II  HCPCS  code  to  tests  that  are  not  already  described  by  a  unique  CPT  code.  If  our
Guardant360 test receives approval from the FDA, we may be required to obtain a new code to report the Guardant360 test on claims submitted to U.S. payers.
New  CPT  codes  are  issued  annually  and  new  HCPCS  codes  are  issued  as  frequently  as  quarterly.  Payers’  acceptance  of  the  new  code  could  be  delayed,  and
transition  to  the  new  code  could  result  in  a  decrease  in  reimbursement  for  our  tests,  both  of  which  could  potentially  reduce  revenue  from  commercial  and
government  payers.  Changes  to  the  codes  used  to  report  the  Guardant360  test  to  payers  may  result  in  significant  changes  in  its  reimbursement,  which  could
negatively impact our revenue.

Because the current coding for reporting our products does not describe a specific test, the claim must be examined to determine what test was provided, whether
the test was appropriate and medically necessary, and whether payment should be rendered, which may require a letter of medical necessity from the ordering
physician. This process can result in a delay in processing the claim, a lower reimbursement amount or denial of the claim. Because billing third-party

62

Table of Contents

payers  for  our  tests  is  an  unpredictable,  challenging,  time-consuming  and  costly  process,  we  may  face  long  collection  cycles  and  the  risk  that  we  may  never
collect at all, either of which could adversely affect our business, results of operations and financial condition, and we may have to increase collection efforts and
incur additional costs.

Changes in healthcare laws, regulations and policies could increase our costs, decrease our sales and revenues and negatively impact reimbursement for our
tests.

In March 2010, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation Act, or the ACA,
became law. This law substantially changed the way health care is financed by both commercial payers and government payers, and significantly impacted our
industry.  The  ACA  contains  a  number  of  provisions  expected  to  impact  existing  state  and  federal  health  care  programs  or  result  in  the  development  of  new
programs,  including  those  governing  enrollments  in  state  and  federal  health  care  programs,  reimbursement  changes  and  fraud  and  abuse.  Our  business  and
operations could be affected by the ACA, including in ways we cannot currently predict.

Since its enactment, there have been efforts to repeal all or part of the ACA, and the current Presidential Administration and the U.S. Congress have taken action
to roll back certain provisions of the ACA. For example, the Tax Cuts and Jobs Act, among other things, removes penalties for not complying with the ACA’s
individual mandate to carry health insurance. On December 14, 2018, a U.S. District Court Judge in the Northern District of Texas, or the Texas District Court
Judge, ruled that the individual mandate is a critical and inseverable feature of the ACA, and therefore, because it was repealed as part of the Tax Cuts and Jobs
Act, the remaining provisions of the ACA are invalid as well. On December 18, 2019, the U.S. Court of Appeals for the 5th Circuit upheld the district court’s
decision that the individual mandate was unconstitutional but remanded the case back to the District Court to determine whether the remaining provisions of the
Affordable Care Act are invalid as well. It is unclear how these decisions, subsequent appeals, if any, and other efforts to challenge, repeal or replace the ACA
will impact the ACA or our business.

In  addition,  other  legislative  changes  have  been  proposed  and  adopted  since  the  ACA  was  enacted.  On  August  2,  2011,  the  Budget  Control  Act  of  2011  was
signed into law, which, among other things, reduced Medicare payments to providers by 2% per fiscal year, effective on April 1, 2013 and, due to subsequent
legislative amendments to the statute, will remain in effect through 2029 unless additional Congressional action is taken.

We anticipate there will continue to be proposals by legislators at both the federal and state levels, regulators and commercial and government payers to reduce
healthcare costs while expanding individual healthcare benefits. Certain of these changes could impose additional limitations on the prices we will be able to
charge for our tests, the coverage of or the amounts of reimbursement available for our tests from commercial and government payers.

Our  collection,  use  and  disclosure  of  personally  identifiable  information,  including  patient  and  employee  information,  is  subject  to  privacy  and  security
regulations, and our failure to comply with those regulations or to adequately secure the information in our possession could result in significant liability or
reputational harm.

The privacy and security of personally identifiable information stored, maintained, received or transmitted, including electronically, is a major issue in the United
States  and  abroad.  We  collect,  process,  maintain,  retain,  evaluate,  utilize  and  distribute  large  amounts  of  personal  health  and  financial  information  and  other
confidential and sensitive data about our customers and others in the ordinary course of our business. While we strive to comply with all applicable privacy and
security laws and regulations, as well as our own posted privacy policies, legal standards for privacy, including but not limited to ‘‘unfairness’’ and ‘‘deception,’’
as enforced by the FTC and state attorneys general, continue to evolve and any failure or perceived failure to comply may result in proceedings or actions against
us by government entities or others, or could cause us to lose customers and payer coverage, which could have a material adverse effect on our business and
results  of  operations.  Recently,  there  has  been  an  increase  in  public  awareness  of  privacy  issues  in  the  wake  of  revelations  about  the  various  privacy-related
government investigations and enforcement actions and civil lawsuits against healthcare companies. Concerns about and claims challenging our practices with
regard to the collection, use, retention, disclosure or security of personally identifiable information or other privacy-related matters, even if unfounded and even if
we are in compliance with applicable laws, could damage our reputation and harm our business.

Numerous  federal,  state  and  foreign  laws  and  regulations  govern  collection,  dissemination,  use  and  confidentiality  of  personally  identifiable  information  and
protected health information, including HIPAA, state privacy and confidentiality laws (including state laws requiring disclosure of breaches); federal and state
consumer protection and employment laws; and European and other foreign data protection laws. And new privacy legislation may create additional rights for
consumers and impose additional requirements on businesses. As these laws and regulations increase in complexity and number, they may change frequently,
sometimes conflict and increase our compliance efforts, costs and risks.

63

Table of Contents

HIPAA, as amended by HITECH, establishes a set of national privacy and security standards for the protection of protected health information, or PHI, by health
plans, certain healthcare providers and others that submit certain covered transactions electronically, or ‘‘covered entities,’’ and their ‘‘business associates,’’ which
are persons or entities that perform certain services for, or on behalf of, a covered entity that involve creating, receiving, maintaining or transmitting PHI. We are
a  covered  entity  under  HIPAA  and  therefore  must  comply  with  its  requirements  to  protect  the  privacy  and  security  of  health  information  and  must  provide
individuals with certain rights with respect to their health information. If we engage a business associate to help us carry out healthcare activities and functions,
we must have a written business associate contract or other arrangement with the business associate that establishes specifically what the business associate has
been engaged to do and requires the business associate to comply with the same requirements.

On December 12, 2018, HHS issued a request for information, or RFI, seeking input from the public on how the HIPAA regulations, and the Privacy Rule in
particular, could be modified to amend existing, or impose additional, obligations relating to the processing of PHI. We will monitor this process and assess the
impact of changes to the Privacy Rule or other HIPAA regulations to our business.

Penalties for violations of these laws vary. For instance, a single breach incident can result in findings of violations of multiple HIPAA provisions. Penalties for
failure to comply with a requirement of HIPAA and HITECH vary significantly, and include civil monetary penalties for each provision of HIPAA that is violated
and,  in  certain  circumstances,  criminal  penalties,  including  imprisonment  and/or  additional  fines.  A  person  who  knowingly  obtains  or  discloses  individually
identifiable health information in violation of HIPAA may face additional fines and up to one-year imprisonment. The criminal penalties increase if the wrongful
conduct involves false pretenses or the intent to sell, transfer, or use identifiable health information for commercial advantage, personal gain, or malicious harm.
In addition, responding to government investigations regarding alleged violations of these and other laws and regulations, even if ultimately concluded with no
findings of violations or no penalties imposed, can consume company resources and impact our business and, if public, harm our reputation.

Further, various states, such as California and Massachusetts, have implemented similar privacy laws and regulations, such as the California Confidentiality of
Medical  Information  Act,  that  impose  restrictive  requirements  regulating  the  use  and  disclosure  of  health  information  and  other  personally  identifiable
information, and the California Consumer Privacy Act, which came into effect on January 1, 2020, and creates new data privacy rights for users,. These laws and
regulations  are  not  necessarily  preempted  by  HIPAA,  particularly  if  a  state  affords  greater  protection  to  individuals  than  HIPAA.  Where  state  laws  are  more
protective, we may have to comply with the stricter provisions. In addition to fines and penalties imposed upon violators, some of these state laws also afford
private rights of action to individuals who believe their personal information has been misused. The interplay of federal and state laws may be subject to varying
interpretations by courts and government agencies, creating complex compliance issues for us and our clients, and potentially exposing us to additional expense,
adverse publicity and liability. Further, as regulatory focus on privacy issues continues to increase and laws and regulations concerning the protection of personal
information expand and become more complex, these potential risks to our business could intensify. Changes in laws or regulations associated with the enhanced
protection  of  certain  types  of  sensitive  data,  such  as  PHI,  or  personally  identifiable  information  along  with  increased  demands  for  enhanced  data  security
infrastructure, could greatly increase our costs of providing our services, decrease demand for our services, reduce our revenue and/or subject us to additional
risks.

In addition, the interpretation and application of consumer, health-related, and data protection laws, especially with respect to genetic samples and data, in the
United States, the European Union, or the EU, and elsewhere are often uncertain, contradictory, and in flux. We and our joint ventures operate or may operate in a
number of countries outside of the United States whose laws may in some cases be more stringent than the requirements in the United States. For example, EU
member countries have specific requirements relating to cross-border transfers of personal data to certain jurisdictions, including to the United States where our
laboratory resides. In addition, some countries have stricter consumer notice and/or consent requirements relating to personal data collection, use or sharing, more
stringent  requirements  relating  to  organizations’  privacy  programs  and  provide  stronger  individual  rights.  Moreover,  international  privacy  and  data  security
regulations may become more complex and have greater consequences. For instance, the General Data Protection Regulation, or GDPR, went into effect in May
2018  and  imposes  stringent  data  protection  requirements  for  controllers  and  processors  of  personal  data  of  persons  within  the  EU.  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  enhances  data  protection  obligations  for  processors  and  controllers  of  personal  data,
including,  for  example,  higher  standards  for  obtaining  consent  from  individuals  to  process  their  personal  data,  more  robust  disclosures  to  individuals  and  a
strengthened  individual  data  rights  regime,  shortened  timelines  for  data  breach  notifications,  limitations  on  retention  of  information,  increased  requirements
pertaining to health data, other special categories of personal data and pseudonymised (i.e., key-coded) data and additional obligations when we contract third-
party processors in connection

64

Table of Contents

with the processing of the personal data. The GDPR provides that EU member states may make their own further laws and regulations limiting the processing of
personal data, including genetic, biometric or health data, which could limit our ability to use and share personal data or could cause our costs could increase, and
harm our business and financial condition. Failure to comply with the requirements of GDPR and the applicable national data protection laws of the EU Member
States may result in fines of up to €20,000,000 or up to 4% of the total worldwide annual turnover of the preceding financial year, whichever is higher, and other
administrative penalties. Failure to comply with the GDPR and other applicable privacy or data security-related laws, rules or regulations could result in material
penalties  imposed  by  regulators,  affect  our  compliance  with  client  contracts  and  have  an  adverse  effect  on  our  business,  financial  condition  and  results  of
operations.

European data protection law also imposes strict rules on the transfer of personal data out of the EU to the United States. These obligations may be interpreted
and applied in a manner that is inconsistent from one jurisdiction to another and may conflict with other requirements or our practices. In addition, these rules are
constantly under scrutiny. For example, both the EU-U.S. Privacy Shield Framework and EU Standard Contractual Clauses are the subject of legal challenges in
European courts and may face additional challenges in the future, and the absence of successor safeguards for continued data transfer could require us to create
duplicative, and potentially expensive, information technology infrastructure and business operations in Europe or limit our ability to collect and use personal
information  collected  in  Europe.  In  addition,  the  EU  Commission  has  proposed  a  new  ePrivacy  Regulation  that  would  address  various  matters,  including
provisions specifically aimed at the use of cookies to identify an individual’s online behavior, and any such ePrivacy Regulation may provide for new compliance
obligations  and  significant  penalties.  Any  of  these  changes  to  EU  data  protection  law  or  its  interpretation  could  disrupt  and  harm  our  business.  We  rely  on  a
mixture of safeguards to transfer personal data from our EU business to the U.S., and could be impacted by changes in law as a result of a future review of these
transfer mechanisms by European regulators or current challenges to these mechanisms in the European courts.

In addition, the United Kingdom leaving the EU could also lead to further legislative and regulatory changes. It remains unclear how the United Kingdom data
protection laws or regulations will develop in the medium to longer term and how data transfer to the United Kingdom from the EU will be regulated, especially
following  the  United  Kingdom's  departure  from  the  EU  on  January  31,  2020  without  a  deal.  However,  the  United  Kingdom  has  transposed  the  GDPR  into
domestic law with the Data Protection Act 2018, which remains in force following the United Kingdom's departure from the EU.

Because of the breadth of these laws and the narrowness of their exceptions and safe harbors, it is possible that our current practices are challenged under one or
more of such laws. The scope and enforcement of each of these laws is uncertain and subject to rapid change in the current environment of healthcare reform.
Federal, state and foreign enforcement bodies have 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.

Cyber-based attacks, security breaches, loss of data and other disruptions in relation to our information systems and computer networks could compromise
sensitive information related to our business, prevent us from accessing it and expose us to liability, which could adversely affect our business and reputation.

Cyber-attacks,  security  breaches,  computer  viruses,  malware  and  other  incidents  could  cause  misappropriation,  loss  or  other  unauthorized  disclosure  of
confidential data, materials or information, including those concerning our customers and employees. Increasingly complex methods have been used in cyber-
attacks, including ransomware, phishing, structured query language injections and distributed denial-of-service attacks. A cyber-attack can also be in the form of
unauthorized access or a blocking of authorized access. We can provide no assurance that we or our vendors will be able to detect, prevent or contain the effects
of  such  attacks  or  other  information  security  risks  or  threats  in  the  future.  The  costs  of  attempting  to  protect  against  the  foregoing  risks  and  the  costs  of
responding to a cyber-attack are significant. Large scale data breaches at other entities increase the challenge we and our vendors face in maintaining the security
of our information technology systems and of our customers’ sensitive information. Following a cyber-attack, our and/or our vendors’ remediation efforts may
not be successful, and a cyber-attack could result in interruptions, delays or cessation of service, and loss of existing or potential customers. In addition, breaches
of  our  and/or  our  vendors’  security  measures  and  the  unauthorized  dissemination  of  sensitive  personal  information  or  proprietary  information  or  confidential
information about us, our customers or other third-parties, could expose our customers' private information and our customers to the risk of financial or medical
identity  theft,  or  expose  us  or  other  third  parties  to  a  risk  of  loss  or  misuse  of  this  information,  and  result  in  investigations,  regulatory  enforcement  actions,
material fines and penalties, loss of customers, litigation or other actions which could have a material adverse effect on our business, prospects, reputation, results
of operations and financial condition. In addition, if we fail to adhere to our privacy policy and other published statements or applicable laws concerning our
processing, use, transmission and disclosure of protected

65

Table of Contents

information, or if our statements or practices are found to be deceptive or misrepresentative, we could face regulatory actions, fines and other liability.

In  the  ordinary  course  of  our  business,  we  collect  and  store  sensitive  data,  including  PHI,  personally  identifiable  information,  credit  card  and  other  financial
information, intellectual property and proprietary business information owned or controlled by us or other parties such as customers and payers. We manage and
maintain our applications and data utilizing a combination of on-site systems and cloud-based data centers. We utilize external security and infrastructure vendors
to manage parts of our data centers. We also communicate sensitive data, including patient data, through phone, Internet, facsimile, multiple third-party vendors
and their subcontractors or integrations with third-party electronic medical records. These applications and data encompass a wide variety of information critical
to our business, including research and development information, patient data, commercial information and business and financial information. We face a number
of risks related to protecting this critical information, including loss of access, inappropriate use or disclosure, unauthorized access, inappropriate modification
and  our  being  unable  to  adequately  monitor,  audit  or  modify  our  controls  over  such  critical  information.  This  risk  extends  to  the  third-party  vendors  and
subcontractors we use to manage this sensitive data or otherwise process it on our behalf.

The  secure  processing,  storage,  maintenance  and  transmission  of  this  critical  information  are  vital  to  our  operations  and  business  strategy,  and  we  devote
significant resources to protecting such information. Although we take reasonable measures to protect sensitive data from unauthorized access, use, modification
or  disclosure,  no  security  measures  can  be  perfect  and  our  information  technology  infrastructure  could  be  vulnerable  to  hackers,  phishing  scams,  malware,
viruses, security flaws, employee errors, and other malfeasance or inadvertent disruptions. Any breach or interruption of our security measures or information
technology infrastructure could compromise our networks, and the information stored there could be accessed by unauthorized parties, publicly disclosed, lost or
stolen. Any such access, breach, or other loss of information could result in legal claims or proceedings, and liability under federal, state or foreign laws that
protect  the  privacy  of  personal  information,  such  as  HIPAA  or  HITECH,  and  regulatory  penalties.  Notice  of  breaches  is  required  to  be  made  to  affected
individuals, the Secretary of the Department of Health and Human Services or other state, federal or foreign regulators, and for extensive breaches, notice may
need to be made to the media or State Attorneys General. Such a notice could harm our reputation and our ability to compete. Although we have implemented
security measures and an enterprise security program to prevent unauthorized access to patient data, such data is currently accessible through multiple channels,
and there is no guarantee we can protect all data from breach. Unauthorized access, loss or dissemination could disrupt our operations (including our ability to
perform our analysis, provide test results, bill payers or patients, process claims and appeals, provide customer assistance, conduct research and development,
develop  intellectual  property,  collect,  process  and  prepare  financial  information,  provide  information  about  our  tests  and  continue  other  patient  and  physician
education and outreach efforts, and manage our business) and damage our reputation, any of which could adversely affect our business and financial condition.
We continue to prioritize security and the development of practices and controls to protect our systems. As cyber threats 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 information security vulnerabilities,
and these efforts may not be successful.

For  example,  in  July  2018,  we  experienced  security  incidents  involving  an  unauthorized  actor  obtaining  access  to  our  email  system  and  sending  phishing
messages. We promptly engaged an independent cybersecurity firm to support our investigation, assess our systems and bolster security thereof. These incidents
resulted  in  the  unauthorized  access  of  certain  information  relating  to  an  aggregate  of  approximately  1,700  individuals.  For  approximately  1,100  of  these
individuals, the information accessed included PHI and primarily consisted of patients’ names, contact information, birth dates, medical diagnosis codes and, in a
very limited number of cases, Social Security numbers. For the remaining individuals, information accessed did not include PHI and primarily consisted of Social
Security numbers and certain other personal financial information, and credit card information in one of the incidents. We have provided timely notices to the
U.S.  Department  of  Health  and  Human  Services,  or  the  HHS,  certain  state  regulators  and  certain  credit  agencies,  as  applicable,  as  well  as  to  the  individuals
affected. We have offered credit monitoring and identity protection services to those who have been affected by this cyber-attack. While the cyber-attack did not
have a material impact on our business, cash flows, financial condition and results of operations, we have incurred and may continue to incur internal and external
costs, including those relating to mitigation of the incidents, and may be subject to penalties, such as those described above. We have implemented and continue
to  implement  additional  security  measures  as  appropriate  to  help  prevent  future  unauthorized  access  to  our  systems  and  the  data  we  maintain,  but  we  cannot
guarantee  that  future  incidents  can  be  avoided.  In  addition,  because  the  cybersecurity  firm’s  investigation  only  analyzed  our  email  accounts  dating  back  to
February 2018 (the time period for which security logs were available in our email software), we cannot assure that no similar incidents took place before that
time.

66

Table of Contents

In connection with a former employee’s complaints alleging non-compliance with applicable provisions of HIPAA, we received requests for information from the
HHS Office for Civil Rights, or OCR, in August 2019. After we responded to these requests, we were informed by the OCR that it has closed this matter without
further action.

We have contingency plans and insurance coverage for certain potential claims, liabilities, and costs relating to security incidents that may arise from our business
or operations; however, the coverage may not be sufficient to cover all claims, liabilities, and costs arising from the incidents, including fines and penalties. It
could be difficult to predict the ultimate resolution of any such incidents or to estimate the amounts or ranges of potential loss, if any, that could result therefrom.
If we cannot successfully resolve a security incident or contain any potential loss, it could materially impact our ability to operate our business as well as our
results of operations and financial position.

Risks related to our intellectual property

If we are unable to obtain and maintain sufficient intellectual property protection for our technology, or if the scope of the intellectual property protection
obtained  is  not  sufficiently  broad,  our  competitors  could  develop  and  commercialize  products  similar  or  identical  to  ours,  and  our  ability  to  successfully
commercialize our products may be impaired.

We rely on patent protection as well as trademark, copyright, trade secret and other intellectual property rights protection and contractual restrictions to protect
our  proprietary  technologies,  all  of  which  provide  limited  protection  and  may  not  adequately  protect  our  rights  or  permit  us  to  gain  or  keep  any  competitive
advantage. If we fail to protect our intellectual property, third parties may be able to compete more effectively against us. In addition, we have incurred and may
continue to incur substantial litigation costs in our attempts to recover or restrict use of our intellectual property.

To the extent our intellectual property offers inadequate protection, or is found to be invalid or unenforceable, we would be exposed to a greater risk of direct
competition. If our intellectual property does not provide adequate coverage of our competitors’ products, our competitive position could be adversely affected, as
could our business. Both the patent application process and the process of managing patent disputes can be time-consuming and expensive.

As is the case with other biotechnology companies, our success depends in large part on our ability to obtain and maintain protection of the intellectual property
we own solely and may own jointly with others or we have licensed and may continue to license from others, particularly patents, in the United States and other
countries with respect to our products and technologies. We apply for patents covering our products and technologies and uses thereof, as we deem appropriate.
However, obtaining and enforcing biotechnology patents is costly, time-consuming and complex, and we may fail to apply for patents on important products,
services and technologies in a timely fashion or at all, or we may fail to apply for patents in potentially relevant jurisdictions. We may not be able to file and
prosecute all necessary or desirable patent applications, or maintain, enforce and license any patents that may issue from such patent applications, at a reasonable
cost or in a timely manner. It is also possible that we will fail to identify patentable aspects of our research and development output before it is too late to obtain
patent protection. We may not have the right to control the preparation, filing and prosecution of patent applications, or to maintain the rights to patents licensed
to third parties. Therefore, these patents and applications may not be prosecuted and enforced in a manner consistent with the best interests of our business.

We own or license numerous U.S. patents and pending U.S. patent applications, with international counterparts in certain countries. It is possible that our or our
licensors’ pending patent applications will not result in issued patents in a timely fashion or at all, and even if patents are granted, they may not provide a basis for
intellectual  property  protection  of  commercially  viable  products  or  services,  may  not  provide  us  with  any  competitive  advantages,  or  may  be  challenged  and
invalidated  by  third  parties.  It  is  possible  that  others  will  design  around  our  current  or  future  patented  technologies.  Some  of  such  patent  rights  are  being
challenged,  including  at  the  United  States  Patent  and  Trademark  Office,  or  USPTO,  in  post-grant  proceedings,  at  the  European  Patent  Office,  or  EPO,  in
opposition proceedings, and some of such patent rights may be challenged in the future. We may not be successful in defending any such challenges made against
our owned or licensed patents or patent applications. Any successful third-party challenge to such patent rights could result in their unenforceability or invalidity
and increased competition to our business. We have challenged and may choose to challenge the patents or patent applications of third parties. The outcome of
patent litigation or other proceeding can be uncertain, and any attempt by us to enforce our patent rights against others or to challenge the patent rights of others
may not be successful, or, if successful, may take substantial time and result in substantial cost, and may divert our efforts and attention from other aspects of our
business.

67

Table of Contents

The  patent  positions  of  life  sciences  companies  can  be  highly  uncertain  and  involve  complex  legal  and  factual  questions  for  which  important  legal  principles
remain  unresolved.  No  consistent  policy  regarding  the  breadth  of  claims  allowed  in  such  companies’  patents  has  emerged  to  date  in  the  United  States  or
elsewhere. Courts frequently render opinions in the biotechnology field that may affect the patentability of certain inventions or discoveries, including opinions
that may affect the patentability of methods for analyzing or comparing DNA sequences.

In  particular,  the  patent  positions  of  companies  engaged  in  the  development  and  commercialization  of  genomic  diagnostic  tests,  like  our  current  products,
including our Guardant360 and GuardantOMNI tests, and our future products, are particularly uncertain. Various courts, including the U.S. Supreme Court, have
rendered  decisions  that  affect  the  scope  of  patentability  of  certain  inventions  or  discoveries  relating  to  certain  diagnostic  tests  and  related  methods.  These
decisions state, among other things, that a patent claim that recites an abstract idea, natural phenomenon or law of nature (for example, the relationship between
particular genetic variants and cancer) are not themselves patentable. Precisely what constitutes a law of nature is uncertain, and it is possible that certain aspects
of genetic diagnostics tests would be considered natural laws. Accordingly, the evolving legal and administrative standards around the world, including in the
United  States  may  adversely  affect  our  ability  to  obtain  patents  and  may  facilitate  third-party  challenges  to  any  owned  or  licensed  patents.  The  laws  of  some
foreign jurisdictions do not protect intellectual property rights to the same extent as the laws of the United States, and we may encounter difficulties in protecting
and  defending  such  rights  in  foreign  jurisdictions.  The  legal  systems  of  many  foreign  jurisdictions  do  not  favor  the  enforcement  of  patent  rights  and  other
intellectual property protection, particularly those relating to biotechnology, which could make it difficult for us to stop the infringement of our patent rights and
other intellectual property rights thereunder. Proceedings to enforce our patent rights and other intellectual property protection in foreign jurisdictions could result
in substantial cost and divert our efforts and attention from other aspects of our business.

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

Changes in either the patent laws or in interpretations of patent laws in the United States or other countries or regions may diminish the value of our intellectual
property.  We  cannot  predict  the  breadth  of  claims  that  may  be  allowed  or  enforced  in  our  patents  or  in  third-party  patents.  We  may  not  develop  additional
proprietary products, methods and technologies that are patentable.

Assuming that other requirements for patentability are met, prior to March 16, 2013, in the United States, the first to invent the claimed invention was entitled to
the patent, while outside the United States, the first to file a patent application was entitled to the patent. On or after March 16, 2013, under the Leahy-Smith
America  Invents  Act,  or  the  America  Invents  Act,  enacted  in  September  16,  2011,  the  United  States  transitioned  to  a  first  inventor  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. A third party that files a patent application in the USPTO on or after March 16, 2013, but
before us could therefore be awarded a patent covering an invention of ours even if we had made the invention before it was made by such third party. This will
require us to be cognizant of the time from invention to filing of a patent application. Since patent applications in the United States and most other countries are
confidential for a period of time after filing or until issuance, we cannot be certain that we or our licensors were the first to either (i) file any patent application
related to our product candidates or (ii) invent any of the inventions claimed in our or our licensor’s patents or patent applications.

The America Invents Act also includes a number of significant changes that affect the way patent applications will be prosecuted and also affect patent litigation.
These include allowing third-party submission of prior art to the USPTO during patent prosecution or post-grant proceedings, including post-grant review, inter
partes  review  and  derivation  proceedings,  to  attack  the  validity  of  a  patent.  Because  of  a  lower  evidentiary  standard  in  USPTO  proceedings  compared  to  the
evidentiary  standard  in  United  States  federal  courts  necessary  to  invalidate  a  patent  claim,  a  third  party  could  potentially  provide  evidence  in  a  USPTO
proceeding sufficient for the USPTO to hold a claim invalid even though the same evidence might not be sufficient to invalidate the claim if presented in a district
court  action.  Accordingly,  third  parties  have  used  and  may  continue  to  use  the  USPTO  proceedings  to  invalidate  our  patent  claims  that  would  not  have  been
invalidated  if  first  challenged  by  the  third  party  in  a  district  court  action.  Therefore,  the  America  Invents  Act  and  its  implementation  could  increase  the
uncertainties and costs surrounding our or our licensors' prosecution of patent applications and enforcement or defense of issued patents, all of which could have a
material adverse effect on our business, financial condition, results of operations and prospects.

68

Table of Contents

Issued patents covering our products could be found invalid or unenforceable if challenged.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability. Some of our owned or licensed patent rights have been, are
being  or  may  be  challenged  at  a  future  point  in  time  in  opposition,  derivation,  re-examination,  inter  partes  review,  post-grant  review  or  interference.  Any
successful third-party challenge to our patent rights in this or any other proceeding could result in the unenforceability or invalidity of such patent rights, which
may lead to increased competition to our business, which could harm our business. In addition, if the breadth or strength of protection provided by our patents and
patent applications is threatened, regardless of the outcome, it could dissuade companies from collaborating with us to license, develop or commercialize our
current or future products.

We  may  not  be  aware  of  all  third-party  intellectual  property  rights  potentially  relating  to  our  product  candidates.  Publications  of  discoveries  in  the  scientific
literature  often  lag  behind  the  actual  discoveries,  and  patent  applications  in  the  United  States  and  other  jurisdictions  are  typically  not  published  until
approximately 18 months after filing or, in some cases, not until such patent applications issue as patents. We might not have been the first to make the inventions
covered by each of our pending patent applications and we might not have been the first to file patent applications for these inventions. To determine the priority
of  these  inventions,  we  have  participated  and  may  continue  to  participate  in  interference  proceedings,  derivation  proceedings  or  other  post-grant  proceedings
declared by the USPTO that could result in substantial cost to us. The outcome of such proceedings is uncertain. No assurance can be given that other patent
applications will not have priority over our patent applications. In addition, changes to the patent laws of the United States allow for various post-grant opposition
proceedings that have not been extensively tested, and their outcome is therefore uncertain. Our licensors may also license patent rights to others, and we may not
be aware of such licenses before they are granted or such licenses may be subject to disputes or uncertainties that affect patent rights licensed by us or could limit
our  ability  to  enforce  such  patent  rights.  If  third  parties  bring  actions  against  our  owned  or  licensed  patent  rights,  we  could  experience  significant  costs  and
management distraction.

In  patent  litigation  in  the  United  States  or  abroad,  defendant  counterclaims  alleging  invalidity  or  unenforceability  are  commonplace.  Grounds  for  a  validity
challenge could be an alleged failure to meet any of several statutory requirements, including lack of novelty, obviousness or non-enablement. Grounds for an
unenforceability assertion could be an allegation that someone connected with prosecution of the patent withheld relevant information from the patent office or
made a misleading statement during prosecution. Similar claims may also be raised before patent offices in the United States or abroad, even outside the context
of litigation, through mechanisms including re-examination, post-grant review and equivalent proceedings in foreign jurisdictions (e.g., opposition proceedings).
Such  proceedings  could  result  in  revocation  or  amendment  to  our  patent  rights  in  such  a  way  that  they  no  longer  cover  our  products.  The  outcome  of  patent
litigation or patent office proceedings following assertions of invalidity and unenforceability is unpredictable. With respect to the validity question, for example,
we cannot be certain that there is no invalidating prior art, of which we and the patent examiner were unaware during prosecution. If a defendant were to prevail
on a legal assertion of invalidity and/or unenforceability, we would lose at least part, and perhaps all, of the patent protection on our products. Such a loss of
patent protection could have a material adverse impact on our business.

We and some of our licensors have initiated, are currently involved in, and may in the future initiate or become involved in legal proceedings against a third party
to  enforce  a  patent  covering  one  of  our  products.  For  example,  we  filed  separate  patent  infringement  suits  against  Foundation  Medicine,  Inc.  (“Foundation
Medicine”)  and  Personal  Genome  Diagnostics,  Inc.  (“Personal  Genome  Diagnostics”),  alleging  that  each  infringed  patent  related  to  our  digital  sequencing
technology.

Defendants in such proceedings could counterclaim that the patents covering our product are invalid or unenforceable and could institute legal proceedings to
challenge  such  patents  both  in  court  and  before  patent  offices.  For  example,  Foundation  Medicine  and  Personal  Genome  Diagnostics  have  each  asserted
counterclaims  of  patent  invalidity,  unenforceability  under  the  doctrine  of  inequitable  conduct,  and  non-infringement.  Personal  Genome  Diagnostics  has  also
alleged antitrust violations related to the enforcement of our patent rights. In addition, Personal Genome Diagnostics and Foundation Medicine have each filed
petition for post-grant review with the Patent Trial and Appeal Board at the USPTO, challenging the patentability of certain patents asserted by us. If Foundation
Medicine  or  Personal  Genome  Diagnostics  were  to  prevail  on  their  assertions  of  invalidity  and/or  unenforceability,  we  would  lose  at  least  part  of  the  patent
protection on our products. Such a loss of patent protection could have a material adverse impact on our business. A counterclaim, even if not successful, could
be time-consuming and expensive to defend, damage our reputation in the marketplace and the prospects for our business, and divert our management’s attention.

69

Table of Contents

We rely on licenses from third parties, and if we lose these licenses then we may be subjected to future litigation.

We  are,  and  we  may  acquire  companies  that  are,  party  to  various  royalty-bearing  license  agreements  that  grant  us  rights  to  use  certain  intellectual  property,
including  patents  and  patent  applications,  typically  in  certain  specified  fields  of  use.  We  may  need  to  obtain  additional  licenses  from  others  to  advance  our
research,  development  and  commercialization  activities.  Our  license  agreements  impose,  and  we  expect  that  future  license  agreements  will  impose,  various
development,  diligence,  commercialization  and  other  obligations  on  us,  including  obligations  to  making  payments  to  our  licensors  upon  achievement  of
milestones.

In spite of our efforts, our licensors have asserted and may in the future assert that we have materially breached our obligations under such license agreements and
could therefore seek or threaten to terminate the license agreements. If these licenses are terminated, or if the underlying patent rights fail to provide the intended
exclusivity, our ability to develop and commercialize products and technology covered by these license agreements would be limited or lost, and our competitors
or other third parties might have the freedom to develop, produce, seek regulatory approval of, or to market, products identical or similar to ours and we may be
required to cease our development and commercialization activities. Our actual or potential licensors could take action with respect to our licensed intellectual
property that may decrease the value of such licensed intellectual property. Any of the foregoing could have a material adverse effect on our competitive position,
business, financial condition, results of operations and prospects. Moreover, disputes could arise with respect to any aspect of our license agreements, including:

•

•

•

•

•

•

•

the scope of rights granted under the license agreement and other interpretation-related issues;

the extent to which our products or product candidates, technology and processes infringe on intellectual property of the licensor that is not subject to the
licensing agreement;

the licensing of patent and other rights controlled by our licensors or developed under our collaborative development relationships to others;

our diligence obligations under the license agreement and what activities satisfy those diligence obligations;

the inventorship and ownership of inventions and know-how licensed to us or resulting from the joint creation or use of intellectual property by our licensors,
us and/or our partners;

the validity, enforceability or priority of licensed patent rights; and

the amount of royalties and other payments we are obligated to pay under the license agreement.

If we do not prevail in such disputes, we may lose any of such license agreements, the license agreements may not be meaningful for our business and operations,
and we may be subject to unnecessary or additional payment obligations.

In addition, the agreements under which we currently license intellectual property or technology from third parties are complex, and certain provisions in such
agreements could be susceptible to multiple interpretations. The resolution of any such contract interpretation disagreement 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 licensed intellectual property impair our ability to enforce licensed intellectual property against third parties or use it to defend ourselves in litigation, the
value of such licensed intellectual property may be diminished.

70

Table of Contents

If we fail to maintain our current licensing arrangements on commercially acceptable terms, we may be unable to successfully develop and commercialize the
affected product candidates, which could have a material adverse effect on our business, financial condition, results of operations and prospects. If any of these
license agreements is terminated, if the licensor fails to abide by the terms of the license agreement, if the licensor fails to prevent infringement by third parties, or
if the licensed patent or other rights are found to be invalid or unenforceable, our may be unable to achieve our business goals and our results of operations and
financial  condition  could  be  adversely  affected.  Absent  the  license  agreements,  we  could  infringe  patents  subject  to  those  agreements,  and  if  the  license
agreements are terminated, we may be subject to litigation by the licensor. Litigation could result in substantial costs and be a distraction to management. If we do
not prevail, we may be required to pay damages, including treble damages, attorneys’ fees, costs and expenses, royalties or, be enjoined from selling our products
or services, including our Guardant360 and GuardantOMNI tests, which could adversely affect our ability to offer products or services, our ability to continue
operations and our financial condition.

If we cannot license and maintain rights to use third-party technology on reasonable terms, we may not be able to successfully commercialize our products.
Our licensed or acquired technology may lose value or utility or over time.

From time to time, we may identify third-party technology we may need, including to develop or commercialize new products or services. We may also need to
negotiate licenses to patents or patent applications before or after introducing a commercial product, and we may not be able to obtain necessary licenses to such
patents  or  patent  applications.  If  we  are  unable  to  enter  into  the  necessary  licenses  on  acceptable  terms  or  at  all,  if  any  necessary  licenses  are  subsequently
terminated, if the licensors fail to abide by the terms of the licenses or fail to prevent infringement by third parties, or if the licensed patents or other rights are
found to be invalid or unenforceable, our business may suffer. In addition, any technology licensed or acquired by us may lose value or utility, including as a
result of a change of in the industry, in our business objectives, others' technology, our dispute with the licensor, and other circumstances outside our control. In
return for the use of a third party’s technology, we may agree to pay the licensor royalties based on sales of our products or services. Royalties are a component of
cost of products or services and affect the margins on our products or services. If we are unable to negotiate reasonable royalties or if we have to pay royalties on
technology that becomes less useful for us or ceases to provide value to us, our profit margin will be reduced and we may suffer losses.

We may not be able to protect or enforce our intellectual property rights adequately throughout the world.

Filing,  prosecuting  and  defending  patents  on  our  products  and  services  in  all  countries  throughout  the  world  would  be  prohibitively  expensive,  and  our
intellectual property rights in some territories outside the United States can be less extensive than those in the United States. In addition, the laws of some foreign
countries and regions do not protect intellectual property rights to the same extent as the laws of the United States, and we may encounter difficulties in protecting
and defending such rights in foreign jurisdictions. Consequently, we may not be able to prevent third parties from practicing our inventions in all jurisdictions, or
from  selling  or  importing  products  made  using  our  inventions  in  and  into  the  United  States  or  other  jurisdictions.  Competitors  may  use  our  inventions  in
jurisdictions where we have not obtained patent protection to develop their own products and may also export infringing products to territories where we have
patent protection, but enforcement is not as strong as that in the United States. These products may compete with our products. Our patents or other intellectual
property rights existing outside the United States may not be effective or sufficient to prevent them from competing. Similarly, intellectual property rights may be
exhausted in certain situations, and others could import our products sold abroad and compete with us domestically.

Many  companies  have  encountered  significant  problems  in  protecting  and  defending  intellectual  property  rights  in  foreign  jurisdictions.  The  legal  systems  of
many other countries and regions do not favor the enforcement of patents and other intellectual property protection, particularly those relating to biotechnology,
which could make it difficult for us to stop the infringement of our patents in such jurisdictions. Proceedings to enforce our patent rights in foreign jurisdictions
could  result  in  substantial  cost  and  divert  our  efforts  and  attention  from  other  aspects  of  our  business,  could  put  our  patents  at  risk  of  being  invalidated  or
interpreted  narrowly  and  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  to  us,  if  any,  may  not  be  commercially  meaningful.  Accordingly,  our  efforts  to  enforce
intellectual property rights around the world may be inadequate to obtain a significant commercial advantage.

71

Table of Contents

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 could
be harmed.

In  addition  to  pursuing  patents  on  our  technology,  we  take  steps  to  protect  our  intellectual  property  and  proprietary  technology  by  entering  into  agreements,
including  confidentiality  agreements,  non-disclosure  agreements  and  intellectual  property  assignment  agreements,  with  our  employees,  consultants,  academic
institutions,  corporate  partners  and,  when  needed,  our  advisers.  However,  we  cannot  be  certain  that  such  agreements  have  been  entered  into  with  all  relevant
parties, and we cannot be certain that our trade secrets and other proprietary information will not be disclosed or that competitors will not otherwise gain access to
our trade secrets or independently develop substantially equivalent information and techniques. For example, any of these parties may breach the agreements and
disclose our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. Such agreements may
not be enforceable or may not provide meaningful protection for our trade secrets or other proprietary information in the event of unauthorized use or disclosure
or other breaches of the agreements, and we may not be able to prevent such unauthorized use or disclosure. If we are required to assert our rights against such
party, it could result in significant cost and distraction.

Monitoring unauthorized use or disclosure is difficult, and we do not know whether the steps we have taken to prevent such use or disclosure are, or will be,
adequate. If we were to enforce a claim that a third party had illegally obtained and was using our trade secrets, it would be expensive and time-consuming, and
the outcome would be unpredictable. In addition, courts outside the United States may be less willing to protect trade secrets.

We  also  seek  to  preserve  the  integrity  and  confidentiality  of  our  proprietary  information  by  maintaining  physical  security  of  our  premises  and  physical  and
electronic security of our information technology systems, but it is possible that these security measures could be breached. If any of our confidential proprietary
information  were  to  be  lawfully  obtained  or  independently  developed  by  a  competitor,  absent  patent  protection,  we  would  have  no  right  to  prevent  such
competitor from using that technology or information to compete with us, which could harm our competitive position.

We may be subject to claims that our employees, consultants or independent contractors have wrongfully used or disclosed confidential information of third
parties or that our employees have wrongfully used or disclosed trade secrets of their former employers.

We have employed or engaged and expect to employ or engage individuals who were previously employed at or associated with universities or other companies,
including  our  competitors  or  potential  competitors.  Although  we  try  to  ensure  that  our  employees,  consultants  and  independent  contractors  do  not  use  the
proprietary information or know-how of others in their work for us, we may be subject to claims that our employees, consultants or independent contractors have
inadvertently or otherwise used or disclosed trade secrets or other proprietary information of their former employers or other third parties, or to claims that we
have  improperly  used  or  obtained  such  trade  secrets.  Litigation  may  be  necessary  to  defend  against  these  claims.  If  we  lose,  in  addition  to  paying  monetary
damages, we may be deprived of valuable intellectual property and face increased competition. A loss of key research personnel or work product could hamper or
prevent our ability to commercialize potential products, which could harm our business. Even if we are successful in defending against these claims, litigation
could result in damage to our reputation and substantial costs and be a distraction to management and affected individuals.

We may not be able to protect and enforce our trademarks and we could infringe others’ trademarks.

We  have  not  yet  registered  trademarks  in  all  of  our  potential  markets,  although  we  have  registered  Guardant  Health,  Guardant360  and  GuardantOMNI  in  the
United States. If we apply to register additional trademarks in the United States and other countries, our applications may not be allowed for registration in a
timely fashion or at all, and our registered trademarks may not be maintained or enforced. In addition, opposition or cancellation proceedings may be filed against
our  trademark  applications  and  registrations,  and  our  trademarks  may  not  survive  such  proceedings.  If  we  do  not  timely  register  and  enforce  marks  used  in
connection with our products or services, we may encounter difficulty in enforcing them against third parties, and if these marks are registered by others, we
could infringe such trademarks.

72

Table of Contents

We may be subject to claims challenging the inventorship or ownership of our owned or licensed intellectual property.

We or our licensors may be subject to claims that former employees, collaborators or other third parties have an interest in or right to our owned or licensed
patents,  trade  secrets  or  other  intellectual  property.  For  example,  we  or  our  licensors  may  have  inventorship  disputes  arise  from  conflicting  obligations  of
employees, consultants or others who are involved in developing such intellectual property. Litigation may be necessary to defend against these and other claims
challenging inventorship or ownership of our owned or licensed patents, trade secrets or other intellectual property. If we or our licensors fail in defending against
any such claims, we may lose exclusive ownership of, or right to use, valuable intellectual property. Even if we are successful in defending against such claims,
litigation could result in damage to our reputation and substantial costs and be a distraction to management and other employees. Any of the foregoing could have
a material adverse effect on our business, financial condition, results of operations and prospects.

We are and may continue to be involved in litigation and other legal proceedings related to intellectual property, which could be time-intensive and costly and
may adversely affect our business, operating results or financial condition.

We have been, are currently in, and may also in the future be, involved with litigation or USPTO actions with various third parties. We expect that the number of
such claims may increase as the number of our products or services grows, and the level of competition in our industry segments increases. Any infringement
claim, regardless of its validity, could harm our business by, among other things, resulting in time-consuming and costly litigation, diverting management’s time
and attention from the development of our business, or requiring the payment of monetary damages (including treble damages, attorneys’ fees, costs and expenses
if we are found to have willfully infringed) and ongoing royalties.

Litigation may be necessary for us to enforce our intellectual property and proprietary rights or to determine the scope, coverage and validity of the intellectual
property  and  proprietary  rights  of  others.  We  are  currently  engaged  in  lawsuits  against  Foundation  Medicine,  Inc.  and  Personal  Genome  Diagnostics,  Inc.  for
infringement over some of our patents and in proceedings before the USPTO in relation to certain such patents. The outcome of such lawsuits, as well as any
other  litigation  or  proceeding,  is  inherently  uncertain  and  might  not  be  favorable  to  us.  Further,  we  could  encounter  delays  in  product  introductions,  or
interruptions in sale of products or services, as we develop alternative products or services. In addition, if we resort to legal proceedings to enforce our intellectual
property rights (as we have against Foundation Medicine, Inc. and Personal Genome Diagnostics, Inc.) or to determine the validity, scope and coverage of the
intellectual property or other proprietary rights of others, the proceedings could be burdensome and expensive, even if we were to prevail. If we do not prevail in
such legal proceedings, we may be required to pay damages, and we may lose significant intellectual property protection for our products or services, such that
competitors could copy our products or services. Any litigation that may be necessary in the future could result in substantial costs and diversion of resources and
could have a material adverse effect on our business, operating results or financial condition.

As we move into new markets and applications for our products or services, incumbent participants in such markets may assert their patents and other intellectual
property or proprietary rights against us as a means of slowing our entry into such markets or as a means to extract substantial license and royalty payments from
us. As our business matures and our public profile grows, we may also be subject to an increased number of allegations of patent infringement, whether by our
competitors  or  other  patent  owners,  both  in  the  United  States  and  throughout  the  world  wherever  we  seek  to  commercialize  our  products  and  services.  Our
competitors and others may have significantly larger and more mature patent portfolios than we have. In addition, while we can assert our own patents or other
rights during litigation, our own patents may provide little or no deterrence or protection against patent holding companies or other patent owners who have no
relevant product or service revenue. Therefore, our commercial success may depend in part on our non-infringement of the patents or other rights of third parties
and on our success in defending ourselves in litigation.

73

Table of Contents

However,  our  research,  development  and  commercialization  activities  are  currently  and  may  in  the  future  be  subject  to  claims  that  we  infringe  or  otherwise
violate patents or other intellectual property rights owned or controlled by third parties. There is a substantial amount of litigation and other patent challenges,
both  within  and  outside  the  United  States,  involving  patent  and  other  intellectual  property  rights  in  the  biotechnology  industry,  including  patent  infringement
lawsuits,  interferences,  oppositions  and  inter  partes  review  proceedings  before  the  USPTO,  and  corresponding  proceedings  before  foreign  patent  offices.
Numerous  U.S.  and  foreign  issued  patents  and  pending  patent  applications,  which  are  owned  by  third  parties,  exist  in  the  fields  in  which  we  are  developing
products. As the precision oncology industry expands and more patents are issued, the risk increases that our products or services may be subject to claims of
infringement of the patent rights of third parties. Numerous significant intellectual property issues have been litigated, are being litigated and will likely continue
to be litigated, between existing and new participants in our existing and targeted markets, and our competitors have asserted and may in the future assert that our
products or services infringe their intellectual property rights as part of a business strategy to impede our successful entry into or growth in those markets, and we
may enforce our owned or licensed intellectual property rights against our competitors and other parties. For example, we have been or are currently involved in
legal proceedings against Foundation Medicine and Personal Genome Diagnostics related to our patent rights both in court and before the USPTO.

Third parties have asserted and may in the future assert that we are employing their proprietary technology or trade secrets without authorization. For instance,
Foundation Medicine, Inc. filed a lawsuit for patent infringement against us in May 2016, which we settled in July 2018. We are also aware of issued U.S. patents
and patent applications with claims related to our products and services, and there may be other related third-party patents or patent applications of which we are
not aware. By interacting with us, our licensors may learn more about our business or technology and could assert additional patent rights against us, such as
patent rights that are not currently licensed to us or patent rights that may be obtained by any such licensors in the future, which may occur if such patent rights
are not available for licensing or if they are not offered on acceptable or commercially reasonable terms. Because patent applications can take many years to issue
and are not publicly available until a certain period of time passes from filing, there may be currently pending patent applications which may later result in issued
patents that our current or future products and services may infringe. In addition, similar to what other companies in our industry have experienced, we expect our
competitors and others may develop or obtain patents with our products or services in mind and claim that making, having made, using, selling, offering to sell or
importing our products or services infringes these patents.

We could incur substantial costs and divert the attention of our management and technical personnel in defending against any of these claims. Parties making
claims against us may be able to sustain the costs of complex patent litigation more effectively than we can, for example, because they have substantially greater
resources.

Parties  making  claims  against  us  may  be  able  to  obtain  injunctive  or  other  relief,  which  could  block  our  ability  to  develop,  commercialize  and  sell  certain
products or services, and could result in the award of substantial damages against us, including treble damages, attorney’s fees, costs and expenses if we are found
to have willfully infringed. In the event of a successful claim of infringement against us, we may be required to pay damages and ongoing royalties, and obtain
one or more licenses from third parties, or be prohibited from selling certain products or services. We may not be able to obtain these licenses on acceptable or
commercially reasonable terms, if at all, or these licenses may be non-exclusive, which could result in our competitors gaining access to the same intellectual
property.  In  addition,  we  could  encounter  delays  in  product  or  service  introductions  while  we  attempt  to  develop  alternative  products  or  services  to  avoid
infringing  third-party  patents  or  proprietary  rights.  Defense  of  any  lawsuit  or  failure  to  obtain  any  of  these  licenses  could  prevent  us  from  commercializing
products or services, and the prohibition of sale of any of our products or services could materially affect our business and our ability to gain market acceptance
for our products or services.

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 this type of litigation. In addition, during the course of this kind of litigation, there could 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 substantial adverse effect on the price of our common stock.

In addition, our agreements with some of our customers, suppliers or other entities with whom we do business require us to defend or indemnify these parties to
the extent they become involved in infringement claims, including the types of claims described above. We could also voluntarily agree to defend or indemnify
third parties in instances where we are not obligated to do so if we determine it would be important to our business relationships. If we are required or agree to
defend  or  indemnify  third  parties  in  connection  with  any  infringement  claims,  we  could  incur  significant  costs  and  expenses  that  could  adversely  affect  our
business, operating results or financial condition.

74

Table of Contents

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

Periodic maintenance fees, renewal fees, annuity fees and various other governmental fees on patents and/or applications will be due to be paid to the USPTO and
various governmental patent agencies outside of the United States at several stages over the lifetime of the patents and/or applications. We have systems in place
to  remind  us  to  pay  these  fees,  and  we  rely  on  our  outside  counsel  to  pay  these  fees  due  to  non-U.S.  patent  agencies.  The  USPTO  and  various  foreign
governmental  patent  agencies  require  compliance  with  a  number  of  procedural,  documentary,  fee  payment  and  other  similar  requirements  during  the  patent
application process. We employ reputable law firms and other professionals to help us comply, and in many cases, an inadvertent lapse can be cured by payment
of  a  late  fee  or  by  other  means  in  accordance  with  the  applicable  rules.  However,  there  are  situations  in  which  non-compliance  can  result  in  abandonment  or
forfeiture of the patent or patent application and thus loss of patent rights in the relevant jurisdiction. Such an event would allow our competitors to enter the
unprotected market and have a material adverse effect on our business.

Patent terms may be inadequate to protect our competitive position for an adequate amount of time.

Patents have a limited lifespan. In the United States, if all maintenance fees are timely paid, the natural expiration of a patent is generally 20 years from its earliest
U.S. non-provisional filing date. Various extensions may be available, but the life of a patent, and the protection it affords, is limited. Even if patents covering our
products  or  services  are  obtained,  once  the  patent  life  has  expired,  we  may  be  open  to  competition.  Given  the  amount  of  time  required  for  the  development,
testing and regulatory review of our new products or services, patents protecting them might expire before or shortly after they are commercialized. As a result,
our  owned  and  licensed  patent  portfolio  may  not  provide  us  with  a  sufficient  exclusivity  period  to  exclude  others  from  commercializing  products  or  services
similar or identical to ours.

Risks related to our common stock

An active trading market for our common stock may not be maintained.

We can provide no assurance that we will be able to maintain an active trading market for our common stock on the Nasdaq Global Select Market, or Nasdaq, or
any other exchange in the future. If an active market for our common stock is not maintained, or if we fail to satisfy the continued listing standards of Nasdaq for
any reason and our common stock is delisted, it may be difficult for our stockholders to sell shares without depressing the market price for the shares or at all. An
inactive  trading  market  may  also  impair  our  ability  to  both  raise  capital  by  selling  shares  of  common  stock  and  acquire  other  complementary  products,
technologies or businesses by using our shares of common stock as consideration.

The price of our common stock has fluctuated substantially and may do so in the future, and you may not be able to resell shares of our common stock at or
above the price at which you purchased them.

The market price of our common stock has been volatile and may fluctuate substantially in the future due to many factors, including:

•

•

•

•

•

•

volume and customer mix for our precision oncology testing;

the introduction of new products or product enhancements by us or others in our industry;

disputes or other developments with respect to our or others’ intellectual property rights;

our ability to develop, obtain regulatory clearance or approval for, and market new and enhanced products on a timely basis;

product liability claims or other litigation;

quarterly or annual variations in our results of operations or those of others in our industry;

• media exposure of our products or of those of others in our industry;

•

changes in governmental regulations or in the status of our regulatory approvals or applications;

75

Table of Contents

•

•

changes in earnings estimates or recommendations by securities analysts; and

general market conditions and other factors, including factors unrelated to our operating performance or the operating performance of our competitors.

In recent years, the stock markets generally have experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the
operating performance of those companies. Broad market and industry factors may significantly affect the market price of our common stock, regardless of our
actual  operating  performance.  In  addition,  in  the  past,  class  action  litigation  has  often  been  instituted  against  companies  whose  securities  have  experienced
periods of volatility in market price. Securities litigation brought against us following volatility in our stock price, regardless of the merit or ultimate results of
such litigation, could result in substantial costs, which would hurt our financial condition and operating results and divert management’s attention and resources
from our business.

Securities analysts may not publish favorable research or reports about our business or may publish no information at all, which could cause our stock price
or trading volume to decline.

The trading market for our common stock is influenced to some extent by the research and reports that industry or financial analysts publish about us and our
business. We do not control these analysts. The analysts who publish information about our common stock may have had relatively little experience with us or
our industry, which could affect their ability to accurately forecast our results and could make it more likely that we fail to meet their estimates. In the event we
obtain  securities  or  industry  analyst  coverage,  if  any  of  the  analysts  who  cover  us  provide  inaccurate  or  unfavorable  research  or  issue  an  adverse  opinion
regarding our stock price, our stock price could decline. If one or more of these analysts cease coverage of us or fail to publish reports covering us regularly, we
could lose visibility in the market, which in turn could cause our stock price or trading volume to decline.

If our estimates or judgments relating to our critical accounting policies are based on assumptions that change or prove to be incorrect, our operating results
could fall below our publicly announced guidance or the expectations of securities analysts and investors, resulting in a decline in the market price of our
common stock.

The  preparation  of  financial  statements  in  conformity  with  accounting  principles  generally  accepted  in  the  United  States  of  America,  or  GAAP,  requires
management to make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes. We base our estimates on
historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making
judgments  about  the  carrying  values  of  assets,  liabilities,  equity,  revenue  and  expenses  that  are  not  readily  apparent  from  other  sources.  In  connection  with
adopting and implementing a new revenue recognition standard, FASB ASC Topic 606, Revenue from Contracts with Customers, management has made and will
continue  to  make  judgments  and  assumptions  based  on  our  interpretation  of  the  new  standard.  The  new  revenue  recognition  standard  is  principle-based  and
interpretation of those principles may vary from company to company based on their unique circumstances. We also adopted a new lease accounting standard,
FASB ASC Topic 842, Leases, which involved significant judgment and assumptions, including the estimation of incremental borrowing rate used to discount our
lease  liabilities  and  the  assessment  of  risks  associated  with  the  specific  economic  environment  of  our  leased  assets.  It  is  possible  that  interpretation,  industry
practice and guidance may evolve as we work toward implementing these new accounting standards. If our assumptions change or if actual circumstances differ
from our assumptions, our operating results may be adversely affected and could fall below our publicly announced guidance or the expectations of analysts and
investors, resulting in a decline in the market price of our common stock.

A significant portion of our total outstanding shares may be sold into the market in the near future. This could cause the market price of our common stock
to drop significantly, even if our business is doing well.

Sales of a substantial number of shares of our common stock in the public market could occur at any time. These sales, or the perception in the market that the
holders  of  a  large  number  of  shares  intend  to  sell  their  shares,  could  result  in  a  decrease  in  the  market  price  of  our  common  stock.  Moreover,  holders  of
approximately 2.6 million shares of our common stock will have rights, subject to some conditions, to require us to file registration statements covering their
shares or to include their shares in registration statements that we may file for ourselves or other stockholders. We also registered shares of our common stock that
have  been  issued  or  that  we  may  issue  under  our  current  equity  compensation  plans,  which  shares  can  be  freely  sold  in  the  public  market,  subject  to  volume
limitations applicable to affiliates.

76

Table of Contents

Our executive officers, directors and principal stockholders have significant voting power and may take actions that may not be in the best interests of our
other stockholders.

As  of  December  31,  2019,  our  executive  officers  and  directors  as  well  as  entities  affiliated  with  them  collectively  controlled  approximately  37%  of  our
outstanding  common  stock.  As  a  result,  these  stockholders,  if  they  act  together,  may  be  able  to  effectively  control  or  exert  significant  influence  over  the
management and affairs of our company and most matters requiring stockholder approval, including the election of directors and approval of significant corporate
transactions. This concentration of ownership may have the effect of delaying or preventing a change of control and might adversely affect the market price of our
common stock. This concentration of ownership may not be in the best interests of our other stockholders.

We expect to incur significant additional costs as a result of being a public company, which may adversely affect our business, financial condition and results
of operations.

We expect to incur costs associated with corporate governance requirements that are applicable to us as a public company, including rules and regulations of the
SEC, under the Sarbanes-Oxley Act, the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, and the Securities Exchange Act of 1934, as
amended,  or  the  Exchange  Act,  as  well  as  the  rules  of  Nasdaq.  These  rules  and  regulations,  including  those  applicable  to  a  large  accelerated  filer  such  as  us,
significantly increase our accounting, legal and financial compliance costs and make some activities more time-consuming. These rules and regulations also make
it more expensive for us to maintain directors’ and officers’ liability insurance. Accordingly, increases in costs incurred as a result of being a publicly traded
company may adversely affect our business, financial condition and results of operations.

If we experience material weaknesses in the future or otherwise fail to maintain an effective system of internal controls in the future, we may not be able to
accurately  report  our  financial  condition  or  results  of  operations  which  may  adversely  affect  investor  confidence  in  us  and,  as  a  result,  the  value  of  our
common stock.

As a result of becoming a public company, we are required, under Section 404 of the Sarbanes-Oxley Act, to furnish annual reports by management on, among
other things, the effectiveness of our internal control over financial reporting. This assessment needs to include disclosure of any material weaknesses identified
by our management in our internal control over financial reporting. A material weakness is a deficiency or combination of deficiencies in internal control over
financial  reporting,  such  that  there  is  a  reasonable  possibility  that  a  material  misstatement  of  a  company’s  annual  and  interim  financial  statements  will  not  be
detected or prevented on a timely basis.

If we identify one or more material weaknesses in our internal control over financial reporting, we will be unable to assert that our internal controls are effective.
The effectiveness of our controls and procedures may be limited by a variety of factors, including:

•

•

•

•

faulty human judgment and simple errors, omissions or mistakes;

fraudulent action of an individual or collusion of two or more people;

inappropriate management override of procedures; and

the possibility that any enhancements to controls and procedures may still not be adequate to assure timely and accurate financial control.

Pursuant to the Sarbanes-Oxley Act and the rules and regulations promulgated by the SEC, we are required to furnish in this Annual Report on Form 10-K a
report by our management regarding the effectiveness of our internal control over financial reporting. The report includes, among other things, an assessment of
the effectiveness of our internal control over financial reporting as of the end of our fiscal year, including a statement as to whether or not our internal control
over financial reporting is effective. This assessment must include disclosure of any material weaknesses in our internal control over financial reporting identified
by management. While we believe our internal control over financial reporting is currently effective, the effectiveness of our internal controls in future periods is
subject to the risk that our controls may become inadequate because of changes in conditions. Establishing, testing and maintaining an effective system of internal
control over financial reporting requires significant resources and time commitments on the part of our management and our finance staff, may require additional
staffing and infrastructure investments and would increase our costs of doing business.

77

Table of Contents

In addition, under the federal securities laws, our auditors are required to express an opinion on the effectiveness of our internal controls. If we are unable to
confirm that our internal control over financial reporting is effective, or if our independent registered public accounting firm is unable to express an opinion on
the effectiveness of our internal controls, we could lose investor confidence in the accuracy and completeness of our financial reports, which could cause the price
of our common stock to decline.

Our disclosure controls and procedures may not prevent or detect all errors or acts of fraud.

We are subject to the periodic reporting requirements of the Exchange Act. We designed our disclosure controls and procedures to provide reasonable assurance
that  information  we  must  disclose  in  reports  we  file  or  submit  under  the  Exchange  Act  is  accumulated,  communicated  to  management,  recorded,  processed,
summarized and reported within the time periods specified in the rules and forms of the SEC. We believe that any disclosure controls and procedures, no matter
how well-conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met.

These  inherent  limitations  include  the  realities  that  judgments  in  decision-making  can  be  faulty,  and  that  breakdowns  can  occur  because  of  simple  error  or
mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by an unauthorized override of
the controls. Accordingly, because of the inherent limitations in our control system, misstatements due to error or fraud may occur and not be detected.

Provisions in our corporate charter documents and under Delaware law could make a change in control of us 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 bylaws may discourage, delay or prevent a merger, acquisition
or other change in control of us that stockholders may consider favorable, including transactions in which our stockholders might otherwise receive a premium
for their 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, these provisions may make it more difficult for our stockholders to replace current members of our board of
directors or add new members thereto. Because our board of directors is responsible for appointing the members of our management team, these provisions could
in turn affect any attempts by our stockholders to change our management team. Among others, these provisions include that:

•

•

•

•

•

•

•

•

our board of directors has the exclusive right to expand its size and to elect directors to fill a vacancy created by the expansion of the board or the resignation,
death or removal of a director, which prevents stockholders from being able to fill vacancies on our board of directors;

our board of directors is divided into three classes, Class I, Class II and Class III, with each class serving staggered three-year terms, which may delay the
ability of stockholders to change the membership of a majority of our board of directors;

our stockholders may not act by written consent, which forces stockholder action to be taken at an annual or special meeting of our stockholders;

a special meeting of stockholders may be called only by our board of directors, its chairman, our chief executive officer or our president, which may delay
the ability of our stockholders to force consideration of a proposal or to take action, including the removal of directors;

our amended and restated certificate of incorporation prohibits cumulative voting in the election of directors, which limits the ability of minority stockholders
to elect their director candidates;

our board of directors may alter our bylaws without obtaining stockholder approval;

approval of the holders of at least two-thirds of the shares entitled to vote at an election of directors is required to adopt, amend or repeal our bylaws or repeal
the provisions of our amended and restated certificate of incorporation regarding the election and removal of directors;

stockholders  must  provide  advance  notice  and  additional  disclosures  in  order  to  nominate  candidates  for  election  to  the  board  of  directors  or  to  propose
matters that can be acted upon at a stockholders’ meeting, which may discourage or deter a potential acquiror from conducting a solicitation of proxies to
elect the acquiror’s own slate of directors or otherwise attempting to obtain control of our company; and

78

Table of Contents

•

our board of directors is authorized to issue shares of preferred stock and to determine the terms of those shares, including preferences and voting rights,
without stockholder approval, which could be used to significantly dilute the ownership of a hostile acquiror.

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.
Furthermore,  our  amended  and  restated  certificate  of  incorporation  specifies  that,  unless  we  consent  in  writing  to  the  selection  of  an  alternative  forum,  to  the
fullest  extent  permitted  by  law,  the  Court  of  Chancery  of  the  State  of  Delaware  will  be  the  sole  and  exclusive  forum  for  most  legal  actions  involving  actions
brought against us by stockholders; provided that, the exclusive forum provision will not apply to suits brought to enforce any liability or duty created by the
Exchange Act or any other claim for which the federal courts have exclusive jurisdiction; and provided further that, if and only if the Court of Chancery of the
State of Delaware dismisses any such action for lack of subject matter jurisdiction, such action may be brought in another state or federal court sitting in the State
of Delaware. We believe these provisions may benefit us by providing increased consistency in the application of Delaware law by Delaware courts, particularly
experienced in resolving corporate disputes, efficient administration of cases on a more expedited schedule relative to other forums and protection against the
burdens of multi-forum litigation. However, these provisions may have the effect of discouraging lawsuits brought against us and our directors and officers by our
stockholders. The enforceability of similar choice of forum provisions in other companies’ certificates of incorporation has been challenged in legal proceedings,
and it is possible that, in connection with any applicable action brought against us, a court could find the choice of forum provisions contained in our amended
and restated certificate of incorporation to be inapplicable or unenforceable in such action.

Our amended and restated certificate of incorporation also provides that the federal district courts of the United States of America will be the exclusive forum for
the resolution of any complaint asserting a cause of action against us or any of our directors, officers, employees or agents and arising under the Securities Act.
However, a Delaware court recently held that such an exclusive forum provision relating to federal courts was unenforceable under Delaware law, and unless and
until the Delaware court decision is reversed on appeal or otherwise abrogated, we do not intend to enforce such a provision in the event of a complaint asserting
a cause of action arising under the Securities Act against us or any of our directors, officers, employees or agents.

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,  future  debt  or  other  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.

79

Table of Contents

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

Our headquarters is located in Redwood City, California, where we lease approximately 163,000 square feet of space in several buildings. These leases currently
have  expiration  dates  ranging  from  2025  to  2027.  Our  CLIA-certified  laboratory  is  located  in  these  facilities,  where  testing  for  both  clinical  and
biopharmaceutical customers is performed. We also maintain leased office spaces in Spring City, Texas and Seattle, Washington. While we believe our existing
facilities are adequate to meet our current requirements, we expect to expand our facilities as our operations grow over time. We believe we will be able to obtain
such additional space on acceptable and commercially reasonable terms.

Item 3. Legal Proceedings

We may from time to time be involved in various legal proceedings and other matters arising in the normal course of business. For example, we have received,
and  may  in  the  future  continue  to,  receive  letters,  claims  or  complaints  from  others  alleging  false  advertising,  patent  infringement,  violation  of  employment
practices  and  trademark  infringement.  We  have  also  instituted,  and  may  in  the  future  institute  additional,  legal  proceedings  to  enforce  our  rights  and  seek
remedies,  such  as  monetary  damages,  injunctive  relief  and  declaratory  relief.  We  cannot  predict  the  results  of  any  such  disputes,  and  despite  the  potential
outcomes, the existence thereof may have an adverse material impact on us because of diversion of management time and attention as well as the financial costs
related to resolving such disputes.

The information under the caption “Commitments and Contingencies - Legal Proceedings” in Note 10 to the consolidated financial statements included elsewhere
in this Annual Report on Form 10-K, concerning certain legal proceedings in which we are involved, is hereby incorporated by reference. The resolution of any
such legal proceeding is subject to inherent uncertainty and could have a material adverse effect on our financial condition, cash flows or results of operations.

Item 4. Mine Safety Disclosures.

Not applicable.

PART II

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

Market information for common stock

Our common stock is traded on the Nasdaq Global Select Market, or Nasdaq, under the symbol “GH.”

Holders of record

As of February 14, 2020, there were 65 holders of record of our common stock. Because many of our shares of common stock are held by brokers and other
institutions on behalf of stockholders, we are unable to estimate the total number of stockholders represented by these record holders.

Dividend policy

We have never declared or paid any dividends on our common stock. We currently intend to retain all available funds and any future earnings for the operation
and expansion of our business. Accordingly, we do not anticipate declaring or paying dividends in the foreseeable future. The payment of any future dividends
will be at the discretion of our board of directors and will depend on our results of operations, capital requirements, financial condition, prospects, contractual
arrangements, including any limitations on payment of dividends, and other factors that the board may deem relevant.

Unregistered sales of equity securities

None.

80

Table of Contents

Purchases of equity securities by the issuer and affiliated purchasers

None.

Securities authorized for issuance under equity compensation plans

The information required by this item with respect to our equity compensation plans is incorporated by reference to our definitive proxy statement relating to our
2020 Annual Meeting of Stockholders to be filed with the SEC within 120 days after the end of the fiscal year to which this Annual Report on Form 10-K relates
(the “2020 Proxy Statement”).

Stock performance graph

The graph below shows a comparison, from October 4, 2018 (the date our common stock commenced trading on the Nasdaq) through December 31, 2019, of the
cumulative total return to stockholders of our common stock relative to the Nasdaq Composite Index (“NBI”) and the Nasdaq Biotechnology Index (“IXIC”). The
graph assumes that $100 was invested in each of our common stock, the Nasdaq Composite and the Nasdaq Biotechnology at their respective closing prices on
October 4, 2018 and assumes reinvestment of gross dividends. The stock price performance shown in the graph represents past performance and should not be
considered an indication of future stock price performance.

This graph is not “soliciting material,” is not deemed “filed” with the SEC and is not to be incorporated by reference into any of our filings under the Securities
Act or the Exchange Act, whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

Item 6. Selected Financial Data

The  following  selected  consolidated  financial  data  should  be  read  in  conjunction  with  Part  II,  Item  7,  “Management’s  Discussion  and  Analysis  of  Financial
Condition and Results of Operations,” and the audited consolidated financial statements and related notes included in Part II, Item 8, “Financial Statements and
Supplementary Data,” of this Annual Report on Form 10-K, including factors that may affect the comparability of such selected information. The consolidated
statements of operations data for the years ended December 31, 2019, 2018 and 2017, respectively, and the consolidated balance sheet data as of December 31,
2019 and 2018, respectively, are derived from our audited consolidated financial statements and

81

Table of Contents

related notes included elsewhere in this Annual Report on Form 10-K. The consolidated statements of operations data for the year ended December 31, 2016 and
the consolidated balance sheet data as of December 31, 2017 and 2016, respectively, are derived from our audited consolidated financial statements that is not
included  in  this  Annual  Report  on  Form  10-K.  The  selected  consolidated  financial  data  in  this  section  are  not  intended  to  replace  our  consolidated  financial
statements and the related notes, and are qualified in their entirety by the consolidated financial statements and related notes included elsewhere in this Annual
Report on Form 10-K. Our historical results are not necessarily indicative of our results in any future period.

(in thousands, except per share data)

2019

2018

2017

2016

Year Ended December 31,

Statements of Operations Data:

Revenue:

Precision oncology testing (1)
Development services (1)

Total revenue

Costs and operating expenses:

Cost of precision oncology testing

Cost of development services

Research and development expense

Sales and marketing expense

General and administrative expense

Total costs and operating expenses

Loss from operations

Interest income

Interest expense

Loss on debt extinguishment

Other income (expense), net

Loss before provision for income taxes

Provision for (Benefit from) income taxes

Net loss

Adjustment of redeemable noncontrolling interest

Net loss attributable to Guardant Health, Inc.

  $

180,462   $

78,407   $

42,088   $

33,913  

214,375  

62,255  

8,465  

86,292  

78,335  

61,399  

296,746  

(82,371)  

13,741  

(1,181)  

—  

88  

(69,723)  

(1,872)  

(67,851)  

(7,800)  

12,232  

90,639  

7,754  

49,842  

39,846  

3,364  

50,714  

53,465  

36,192  

183,581  

(92,942)  

5,266  

(1,251)  

—  

4,702  

28,883  

2,735  

25,562  

32,497  

36,777  

126,454  

(76,612)  

2,234  

(2,702)  

(5,075)  

(1,059)  

24,496

753

25,249

22,065

59

10,859

26,192

9,921

69,096

(43,847)

733

(3,018)

—

(1)

(84,225)  

(83,214)  

(46,133)

38  

7  

6

(84,263)  

(83,221)  

(46,139)

(800)  

—  

—

  $

(75,651)   $

(85,063)   $

(83,221)   $

(46,139)

Deemed dividend related to repurchase of Series A convertible preferred stock

Deemed dividend related to change in conversion rate of Series D convertible

preferred stock

Net loss attributable to Guardant Health, Inc. common stockholders

Net loss per share attributable to Guardant Health, Inc. common stockholders, basic

and diluted

  $

  $

Weighted-average shares used in computing net loss per share attributable to

Guardant Health, Inc. common stockholders, basic and diluted

—  

—  

—  

—  

(4,716)  

(1,058)  

—

—

(75,651)   $

(85,063)   $

(88,995)   $

(46,139)

(0.84)   $

(2.80)   $

(7.07)   $

(3.53)

90,597  

30,403  

12,582  

13,053

82

 
 
 
 
 
 
   
   
   
   
   
   
   
   
 
 
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

(in thousands)

Balance Sheet Data:

Cash, cash equivalents and marketable securities
Working capital (1),(2),(3)
Total assets (1),(3)
Total liabilities (3)
Redeemable noncontrolling interest
Total stockholders’ equity (1)

As of December 31,

2019

2018

2017

2016

  $

791,585   $

496,524   $

294,574   $

524,624  

962,535  

114,542  

49,600  

798,393  

422,047  

587,403  

62,451  

41,800  

223,308  

342,938  

34,332  

—  

483,152  

308,606  

95,256

88,813

116,565

36,869

—

79,696

(1) Fiscal years 2018, 2017 and 2016 results do not reflect the impact of the adoption of the new revenue accounting standard in fiscal year 2019.

(2) We define working capital as current assets less current liabilities. See our audited financial statements and related notes included elsewhere in this Annual Report on Form 10-K for further details regarding

our current assets and current liabilities.

(3) Fiscal years 2018, 2017 and 2016 do not reflect the impact of adoption of the new leasing standard in fiscal year 2019.

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

You should read the following discussion and analysis of financial condition and results of operations together with the consolidated financial statements and
related notes included elsewhere in this Annual Report on Form 10-K. This discussion and other parts of this Annual Report on Form 10-K contain forward-
looking statements that involve risk and uncertainties, such as statements of our plans, objectives, expectations and intentions. Our actual results could differ
materially from those discussed in these forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to,
those discussed in Part I, Item 1A“Risk Factors,” of this Annual Report on Form 10-K.

The following generally compares our results of operations for the years ended December 31, 2019 and 2018. A detailed discussion comparing our results of
operations for the years ended December 31, 2018 and 2017 can be found in Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and
Results of Operations,” of our Annual Report on Form 10-K for the year ended December 31, 2018.

Overview

We are a leading precision oncology company focused on helping conquer cancer globally through use of our proprietary blood tests, vast data sets and advanced
analytics. We believe that the key to conquering cancer is unprecedented access to its molecular information throughout all stages of the disease, which we intend
to  enable  by  a  routine  blood  draw,  or  liquid  biopsy.  Our  Guardant  Health  Oncology  Platform  is  designed  to  leverage  our  capabilities  in  technology,  clinical
development, regulatory and reimbursement to drive commercial adoption, accelerate drug development, improve patient clinical outcomes and lower healthcare
costs. In pursuit of our goal to manage cancer across all stages of the disease, we launched our Guardant360 and GuardantOMNI liquid biopsy-based tests for
advanced stage cancer. Our Guardant360 test, launched in 2014, has been used by more than 7,000 oncologists, over 50 biopharmaceutical companies and all 28
National Comprehensive Cancer Network, or NCCN, Centers. Our GuardantOMNI test, launched in 2017, has been used by our biopharmaceutical customers as
a  comprehensive  genomic  profiling  tool  to  help  accelerate  clinical  development  programs  in  both  immuno-oncology  and  targeted  therapy.  These  tests  fuel
development of our LUNAR program, which aims to address the needs of early stage cancer patients with neoadjuvant and adjuvant treatment selection, cancer
survivors with surveillance, asymptomatic individuals eligible for cancer screening and individuals at a higher risk for developing cancer with early detection.
Our LUNAR-1 assay was launched in 2018 for research use and in late 2019 for investigational use.

Since our inception, we have devoted substantially all of our resources to research and development activities related to our Guardant360 and GuardantOMNI
tests and our LUNAR program, including clinical and regulatory initiatives to obtain approval by the U.S. Food and Drug Administration, or the FDA, as well as
sales and marketing activities. We have over 50 approved, completed or active clinical outcomes studies, more than 150 peer-reviewed publications and more
than 400 scientific abstracts. We are pioneering the clinical comprehensive liquid biopsy market with our Guardant360 and GuardantOMNI tests, both of which
analyze circulating tumor DNA in blood. Our Guardant360 test is a molecular diagnostic test measuring 74 cancer-related genes and has been used by clinicians
to help inform which therapy may be effective for advanced stage cancer patients with solid tumors and by biopharmaceutical companies

83

 
 
   
 
 
 
 
   
   
   
   
 
 
 
 
 
Table of Contents

for  a  range  of  applications,  including  identifying  target  patient  populations  to  accelerate  translational  science  research,  clinical  trial  enrollment,  and  drug
development,  and  post-approval  commercialization.  Our  GuardantOMNI  test  has  a  broader  500-gene  panel,  including  genes  associated  with  homologous
recombination  repair  deficiency  and  biomarkers  for  immuno-oncology  applications,  such  as  tumor  mutational  burden  and  microsatellite  instability,  and  has
achieved comparable analytical performance in clinical studies, including for translational science applications in collaboration with several biopharmaceutical
companies, including AstraZeneca, Bristol-Myers Squibb, Merck MSD, Merck KGaA of Darmstadt, Germany and Pfizer.

Our Guardant360 and GuardantOMNI tests have each been designated by the FDA as a breakthrough device for use as a companion diagnostic in connection
with certain specified therapeutic products of our biopharmaceutical customers. Among other things, designation as a breakthrough device provides for priority
review  by  the  FDA  and  more  interactive  communication  with  the  FDA  during  the  development  process.  Our  Guardant360  and  GuardantOMNI  tests  are  both
being developed as companion diagnostics under collaborations with biopharmaceutical companies, including AstraZeneca and Amgen.

We perform our Guardant360, GuardantOMNI and other tests in our clinical laboratory located in Redwood City, California. Our laboratory is certified pursuant
to the Clinical Laboratory Improvement Amendments of 1988, or CLIA, accredited by the College of American Pathologists, or CAP, permitted by the New York
State Department of Health, or NYSDOH, and licensed in California and four other states.

The analytical and clinical data that we have generated in our efforts to establish clinical utility, combined with the support we have developed with key opinion
leaders, or KOLs, in the oncology space have led to positive coverage decisions by a number of commercial payers. Our Guardant360 test is currently covered by
Cigna, Priority Health, multiple Blue Cross Blue Shield plans as well as the health plans associated with eviCore, which have adopted policies that specifically
cover Guardant360 test for non-small cell lung cancer, or NSCLC, which we believe gives us a competitive advantage with these payers.

In  July  2018,  Palmetto  GBA,  the  Medicare  Administrative  Contractor,  or  MAC,  responsible  for  administering  Medicare’s  Molecular  Diagnostic  Services
Program, or MolDx, issued a local coverage determination, or LCD, for our Guardant360 test for NSCLC patients who meet certain clinical criteria. We worked
with Palmetto GBA to obtain this positive coverage decision through the submission of a detailed dossier of analytical and clinical data to substantiate that the
test  meets  Medicare’s  medical  necessity  requirements.  Subsequently  in  2018,  Noridian  Healthcare  Solutions,  the  MAC  responsible  for  adjudicating  claims  in
California, where our laboratory is located, and a participant in MolDx, also finalized its LCD for Guardant360 test. Pursuant to this Noridian LCD, in September
2018, we began to submit claims for reimbursement for Guardant360 clinical testing performed for NSCLC patients covered under the LCD who meet certain
clinical criteria, and in October 2018, we began to receive payments for these services from Medicare.

We estimate that approximately 75% of Medicare patients tested for NSCLC are covered by the LCDs for NSCLC patients. For the years ended December 31,
2019 and 2018, respectively, approximately 44% and 46% of our U.S. clinical tests were for patients tested for NSCLC.

In  December  2019,  replacing  its  prior  NSCLC  patient  LCD,  Palmetto  GBA  finalized  a  new  LCD  for  our  Guardant360  test  that  provides  limited
Medicare coverage for the Guardant360 test in patients diagnosed with solid cancers of non-central nervous system origin. The new LCD requires that patients
are recurrent, relapsed, refractory, metastatic, or advanced cancer patients who are seeking further treatment and are potential candidates for an FDA-approved or
NCCN-recommended (for Category 1 or 2A level of evidence) biomarker targeted therapy. Additionally, the patient must not have had a previous Guardant360
testing and must be untreated or not responding on the patient’s current therapy. A patient who has previously been tested with the Guardant360 test and has
progressed with new malignant growth since the patient’s prior test is considered to have a new primary cancer diagnosis and thus is eligible to have another test.
Finally,  for  qualifying  cancers  other  than  NSCLC,  tissue-based  comprehensive  genomic  profiling  must  be  infeasible  for  coverage.  NSCLC  patients  would  be
eligible  for  coverage  if  tissue-based  testing  is  infeasible  or  if  previous  tissue-based  comprehensive  genomic  profiling  returned  no  actionable  results.  The  new
LCD covers our Guardant360 test for fee-for-service Medicare patients with advanced cancers who meet its clinical criteria for complete genomic profiling with
next-generation sequencing, or NGS, of tumor tissue to optimize treatment selection decisions but have insufficient or unavailable tissue for molecular profiling.
The expanded Medicare coverage decision is in line with FDA approvals of several tumor-agnostic drugs that are based on a single genomic biomarker across all
cancers or that are targetable across multiple cancer types. We expect Noridian Healthcare Solutions to issue a new LCD for our Guardant360 test equivalent to
the new LCD issued by Palmetto GBA, though the timing and scope of the Noridian LCD are uncertain. Based on historic physician ordering patterns, we believe
the new Noridian LCD, if issued, would significantly expand

84

Table of Contents

coverage  for  use  of  the  Guardant360  test  for  Medicare  patients.  We  also  anticipate  approval  by  the  FDA,  if  obtained,  may  support  further  improvements  in
coverage and reimbursement for our Guardant360 test.

In  the  United  States,  we  market  our  tests  to  clinical  customers  through  our  sales  organization,  which  is  engaged  in  sales  efforts  and  promotional  activities
primarily targeting oncologists and cancer centers. Outside the United States, we market our tests to clinical customers through distributors and direct contracts
with healthcare institutions. We also market our tests to biopharmaceutical customers globally through our business development team, which promotes the broad
utility  of  our  tests  throughout  drug  development  and  commercialization.  Additionally,  we  have  established  a  joint  venture  with  SoftBank  to  accelerate
commercialization of our products including in Asia, the Middle East and Africa, with our initial focus being on Japan. Our products are currently marketed in
approximately 40 countries.

We generated total revenue of $214.4 million, $90.6 million and $49.8 million  for  the  years  ended  December  31,  2019,  2018  and  2017,  respectively.  We  also
incurred net losses of $67.9 million, $84.3 million and $83.2 million in the years ended December 31, 2019, 2018 and 2017, respectively. We have funded our
operations to date principally from the sale of our stock and revenue from our precision oncology testing and development services. In 2017, we raised $320.4
million through the sale of our Series E convertible preferred stock. In October 2018, we completed our initial public offering, or the IPO, selling 14,375,000
shares  of  our  common  stock  and  raising  $249.5  million  net  of  underwriting  discounts  and  commissions  and  other  expenses  payable  by  us.  In  May  2019,  we
completed an underwritten public offering of a total of 5,175,000 shares of our common stock, through which we received net proceeds of approximately $349.7
million after deducting underwriting discounts and commissions and offering expenses payable by us. As of December 31, 2019, we had cash, cash equivalents
and marketable securities of $791.6 million.

Factors affecting our performance

We believe there are several important factors that have impacted and that we expect will impact our operating performance and results of operations, including:

•

•

Testing volume, pricing and customer mix. Our revenue and costs are affected by the volume of testing and mix of customers from period to period. We
evaluate both the volume of tests that we perform for patients on behalf of clinicians and the number of tests we perform for biopharmaceutical companies.
Our performance depends on our ability to retain and broaden adoption with existing customers, as well as attract new customers. We believe that the test
volume we receive from clinicians and biopharmaceutical companies are indicators of growth in each of these customer verticals. Customer mix for our tests
has the potential to significantly affect our results of operations, as the average selling price for biopharmaceutical sample testing is currently higher than our
average selling price for clinical tests because we are not a contracted provider for, or our tests are not covered by clinical patients’ insurance for, the majority
of the tests that we perform for patients on behalf of clinicians. Approximately 38% of our U.S. clinical tests for the years ended December 31, 2019 and
2018 were for Medicare beneficiaries. Prior to the third quarter of 2018, Medicare did not cover our tests and we did not submit claims for reimbursement. In
September 2018, we began to submit claims to Medicare for reimbursement for Guardant360 clinical tests for NSCLC patients covered under MolDx who
meet certain clinical criteria, and in October 2018, we began to receive payments from Medicare for these clinical tests. In December 2019, Palmetto GBA
expanded its LCD for our Guardant360 test to provide limited Medicare coverage for use of Guardant360 for qualifying patients diagnosed with solid tumor
cancers  of  non-central  nervous  system  origin.  Noridian  Healthcare  Solutions,  or  Noridian,  is  the  MAC  responsible  for  adjudicating  claims  in  California
where  our  laboratory  is  located.  Noridian  is  a  participant  in  MolDx  and  recently  issued  a  draft  LCD  for  the  Guardant360  test  modeled  on  the  expanded
Palmetto  LCD.  We  may  not  be  able  to  obtain  reimbursement  under  the  expanded  Noridian  LCD  until  it  is  finalized  and  Noridian  completes  certain
administrative steps.

Regulatory approval. Our Guardant360 test was the first comprehensive liquid biopsy test approved by NYSDOH. In addition, we believe our facility was
the first comprehensive liquid biopsy laboratory to be CLIA-certified, CAP-accredited and NYSDOH-permitted. In the fourth quarter of 2019, we submitted
a premarket approval, or PMA, application to seek the FDA’s approval of our Guardant360 test to be used as a companion diagnostic, initially in connection
with one therapeutic product of a biopharmaceutical customer, and to provide tumor mutation profiling for cancer patients with solid tumors. In February
2020, we submitted an additional module of the PMA application for our Guardant360 test to the FDA. Medicare’s National Coverage Determination for
Next  Generation  Sequencing  established  in  2018  and  subsequently  updated  in  2020  provides  coverage  for  molecular  diagnostic  tests  such  as  our
Guardant360 test, if, among other criteria, such tests are offered within their FDA-approved companion diagnostic labeling. We believe that this establishes a
competitive advantage for tests receiving FDA approval and that FDA approval will be increasingly necessary for diagnostic tests to gain adoption, both in
the United States and abroad. We believe FDA approval, if obtained, will help increase adoption of our tests and

85

Table of Contents

•

•

facilitate favorable reimbursement decisions by Medicare and commercial payers. We also intend to pursue regulatory approvals in specific markets outside
of the United States, including in Europe, Japan and China. Any negative regulatory decisions or changes in regulatory requirements affecting our business
could adversely impact our operations and financial results.

Payer coverage and reimbursement. Our revenue depends on achieving broad coverage and reimbursement for our tests from third-party payers, including
both commercial and government payers. Payment from commercial payers can vary depending on whether we have entered into a contract with the payers
as a “participating provider” or do not have a contract and are considered a “non-participating provider.” Payers often reimburse non-participating providers,
if at all, at a lower amount than participating providers. We have received a substantial portion of our revenue from a limited number of commercial payers,
most of which have not contracted with us to be a participating provider. We have received reimbursement for tests of patients with a variety of cancers,
though  for  amounts  that  on  average  are  significantly  lower  than  for  participating  providers.  We  have  experienced  situations  where  commercial  payers
proactively reduced the amounts they were willing to reimburse for our tests, and in other situations, commercial payers have determined that the amounts
they previously paid were too high and have sought to recover those perceived excess payments by deducting such amounts from payments otherwise being
made.  When  we  contract  with  a  payer  to  serve  as  a  participating  provider,  reimbursements  by  the  payer  are  generally  made  pursuant  to  a  negotiated  fee
schedule  and  are  limited  to  only  covered  indications  or  where  prior  approval  has  been  obtained.  Becoming  a  participating  provider  can  result  in  higher
reimbursement  amounts  for  covered  uses  of  our  test  and,  potentially,  no  reimbursement  for  non-covered  uses  identified  under  the  payer’s  policies  or  the
contract. As a result, the potential for more favorable reimbursement associated with becoming a participating provider may be offset by a potential loss of
reimbursement for non-covered uses of our tests. Current Procedural Terminology, or CPT, coding plays a significant role in how our Guardant360 test is
reimbursed both from commercial and governmental payers. Changes to the codes used to report the Guardant360 test to payers may result in significant
changes in its reimbursement. If our Guardant360 test receives approval from the FDA, we may be required to obtain a new code to report the Guardant360
test on claims submitted to U.S. payers. If a coding change were to occur, payments for certain uses of the Guardant360 test could be reduced or eliminated
by such payers. Cigna, Priority Health, multiple Blue Cross Blue Shield plans as well as the health plans associated with eviCore adopted policies that cover
our Guardant360 test for the majority of NSCLC patients we test. If their policies were to change in the future to cover additional cancer indications, we
anticipate  that  our  total  reimbursement  would  increase.  In  September  2018,  we  began  to  submit  claims  for  reimbursement  with  respect  to  Guardant360
clinical testing performed for NSCLC patients covered under the LCD who meet certain clinical criteria, and in October 2018, we began to receive payments
from Medicare. We estimate total coverage in the United States for the Guardant360 test to be more than 170 million lives, including Medicare beneficiaries
and members of several commercial health plans. If we fail to obtain or maintain coverage and adequate reimbursement from third-party payers, we may be
unable  to  increase  our  testing  volume  and  revenue  as  expected.  Retrospective  reimbursement  adjustments,  such  as  deductions  from  further  payments
and clawbacks, can also negatively impact our revenue and cause our financial results to fluctuate. Due to the inherent variability of the insurance landscape,
historic success of, and payments from, appeals of reimbursement denials by payers are not indicative of future success of and payments from such appeals.

Biopharmaceutical  customers.  Our  revenue  also  depends  on  our  ability  to  attract  new,  and  to  maintain  and  expand  relationships  with  existing,
biopharmaceutical  customers,  and  we  expect  to  increase  our  sales  and  marketing  expense  in  furtherance  of  this  goal.  As  we  continue  to  develop  these
relationships,  we  expect  to  support  a  growing  number  of  clinical  trials  both  in  the  United  States  and  internationally.  If  our  relationships  expand  with
biopharmaceutical  customers,  we  believe  we  may  continue  to  have  opportunities  to  offer  our  platform  to  such  customers  for  companion  diagnostic
development, novel target discovery and validation as well as clinical trial enrollment, and to grow into other business opportunities. For example, we believe
that  our  genomic  data,  in  combination  with  clinical  outcomes  or  claims  data,  has  revenue-generating  potential,  supporting  novel  drug  development  and
companion diagnostic development.

86

Table of Contents

•

•

Research and development. A significant aspect of our business is our investment in research and development, including the development of new products,
such as those being developed as part of our LUNAR program. In particular, we have invested heavily in clinical studies, including more than 50 clinical
outcomes  studies,  the  largest-ever  liquid-to-tissue  concordance  study,  and  a  prospective  interventional  clinical  utility  study  demonstrating  clinical  overall
response rates in line with tissue biopsy approaches. Our clinical research has resulted in over 150 peer-reviewed publications. With respect to our LUNAR
program,  we  initiated  a  prospective  screening  study,  which  we  refer  to  as  the  ECLIPSE  trial,  to  recruit  approximately  10,000  patients  and  evaluate  the
performance of our LUNAR-2 assay in detecting colorectal cancer in average-risk adults, and in collaboration with a National Clinical Trials Network group,
initiated a prospective multi-center randomized controlled trial, which we refer to as the COBRA study, in approximately 1,400 patients with resected stage II
colon  cancer  to  use  our  LUNAR-1  assay  to  evaluate  recurrence-free  survival  in  patients  who  receive  ctDNA-directed  therapy  as  compared  to  the  current
standard-of-care active surveillance. Furthermore, we are collaborating with investigators from multiple academic cancer centers, including MD Anderson
Cancer Center, the University of Colorado, Memorial Sloan Kettering Cancer Center, Massachusetts General Cancer Center, Wake Forest Cancer Center and
the University of California San Francisco, as well as several international institutions. We believe these studies are critical to gaining physician adoption and
driving  favorable  coverage  decisions  by  payers,  and  expect  our  investments  in  clinical  studies  to  increase.  We  expect  to  increase  our  research  and
development expense with the goal of fueling further innovation.

International expansion. A component of our long-term growth strategy is to expand our commercial footprint internationally, and we expect to increase our
sales  and  marketing  expense  to  execute  on  this  strategy.  We  currently  offer  our  tests  in  countries  outside  the  United  States  primarily  through  distributor
relationships or direct contracts with hospitals. In May 2018, we formed and capitalized a joint venture, Guardant Health AMEA, Inc., which we refer to as
the Joint Venture, with SoftBank, relating to the sale, marketing and distribution of our tests generally outside the Americas and Europe. We expect to rely on
the  Joint  Venture  to  accelerate  commercialization  of  our  products  in  Asia,  the  Middle  East  and  Africa,  with  our  initial  focus  being  on  Japan.  The  recent
outbreak of novel coronavirus may disrupt operations for the Joint Venture and make it more difficult to sell our tests in the affected countries or regions,
many  of  which  are  in  the  JV  Territory.  While  the  impact  of  this  outbreak  on  the  Joint  Venture’s  business  is  still  uncertain  and  depends  on  many  factors,
including how long the outbreak goes uncontained, the Joint Venture’s revenue and results of operations could be adversely affected.

While each of these areas presents significant opportunities for us, they also pose significant risks and challenges that we must address. See Part I, Item 1A, “Risk
Factors” of this Annual Report on Form 10-K for more information.

Components of results of operations

Revenue

We derive our revenue from two sources: (i) precision oncology testing and (ii) development services.

Effective January 1, 2019, we adopted a new revenue recognition standard FASB ASC Topic 606, Revenue from Contracts with Customers, or ASC 606, which
primarily impacted our recognition of revenue related to patient claims paid by third-party commercial and governmental payors. We adopted ASC 606 using the
modified retrospective method, which means that the cumulative effect of applying ASC 606 has been recognized to beginning accumulated deficit at January 1,
2019, the date of adoption of ASC 606, and prior comparative periods were not recast to reflect ASC 606. As a result, revenue for the year ended December 31,
2018  is  presented  in  accordance  with  FASB  ASC  Topic  605,  Revenue Recognition,  or  ASC  605,  whereas  revenue  for  the  year  ended  December  31,  2019  is
presented under ASC 606. ASC 606 provides a five-step model for recognizing revenue that includes identifying the contract with a customer, identifying the
performance  obligations  in  the  contract,  determining  the  transaction  price,  allocating  the  transaction  price  to  the  performance  obligations,  and  recognizing
revenue when, or as, an entity satisfies a performance obligation.

Precision  oncology  testing.  Precision  oncology  testing  revenue  is  generated  from  sales  of  our  Guardant  360  and  GuardantOMNI  tests  to  clinical  and
biopharmaceutical  customers.  In  the  United  States,  through  December  31,  2019,  we  generally  performed  tests  as  an  out-of-network  service  provider  without
contracts  with  health  insurance  companies.  We  submit  claims  for  payment  for  tests  performed  for  patients  covered  by  U.S.  private  payers.  Prior  to  the  third
quarter of 2018, Medicare did not cover our tests and we did not submit claims for reimbursement for these tests. In September 2018, we began to submit claims
to  Medicare  for  reimbursement  for  Guardant360  clinical  testing  performed  for  NSCLC  patients  covered  under  Medicare’s  Molecular  Diagnostic  Services
Program who meet certain clinical criteria. Tests for

87

Table of Contents

patients covered by Medicare represented approximately 38% of our U.S. clinical tests in both 2019 and 2018. Due to the historical general lack of contracts with
U.S. private payers and variability in payments received for claims submitted to them, as well as the limited claims experience to date with Medicare, from our
inception through the end of 2018 revenue had not been recognized by us at the time the service was performed as the price of the transaction was not fixed or
determinable and collectability was not reasonably assured. As we provide precision oncology testing to biopharmaceutical customers under contracts for which
all recognition criteria are met, we have recognized revenue on an accrual basis for those services.

Development services. Development services revenue represents services, other than precision oncology testing, that we provide to biopharmaceutical companies
and large medical institutions. It includes companion diagnostic development and regulatory approval services, clinical trial referrals and liquid biopsy testing
development and support. We collaborate with biopharmaceutical companies in the development and clinical trials of new drugs. As part of these collaborations,
we provide services related to regulatory filings with the FDA to support companion diagnostic device submissions for our liquid biopsy panels. Under these
arrangements, we generate revenue from progression of our collaboration efforts, as well as from provision of on-going support. Development services revenue
can vary over time as different projects start and complete.

Costs and operating expenses

Cost of precision oncology testing. Cost  of  precision  oncology  testing  generally  consists  of  cost  of  materials,  direct  labor,  including  bonus,  benefit  and  stock-
based  compensation;  equipment  and  infrastructure  expenses  associated  with  processing  liquid  biopsy  test  samples,  including  sample  accessioning,  library
preparation, sequencing, quality control analyses and shipping charges to transport blood samples; freight; curation of test results for physicians; and license fees
due to third parties. Infrastructure expenses include depreciation of laboratory equipment, rent costs, amortization of leasehold improvements and information
technology costs. Costs associated with performing our tests are recorded as the tests are performed regardless of whether revenue was recognized with respect to
the tests. Royalties for licensed technology are calculated as a percentage of revenues generated using the associated technology and recorded as expense at the
time the related revenue is recognized. One-time royalty payments related to signing of license agreements or other milestones, such as issuance of new patents,
are amortized to expense over the expected useful life of the patents. While we do not believe the technologies underlying these licenses are necessary to permit
us to provide our tests, we do believe these technologies are potentially valuable and of possible strategic importance to us or our competitors. Cost of precision
oncology testing revenue included royalty expense of $4.4 million and $1.4 million for the years ended December 31, 2019 and 2018, respectively.

We expect the cost of precision oncology testing to generally increase in line with the increase in the number of tests we perform, but the cost per test to decrease
modestly over time due to the efficiencies we may gain as test volume increases, and from automation and other cost reductions.

Cost of development services. Cost of development services includes costs incurred for the performance of development services requested by our customers. For
development of new products, costs incurred before technological feasibility has been achieved are reported as research and development expenses, while costs
incurred thereafter are reported as cost of revenue. Cost of development services will vary depending on the nature, timing and scope of customer projects.

Research  and  development  expense.  Research  and  development  expenses  consist  of  costs  incurred  to  develop  technology  and  include  salaries  and  benefits,
reagents  and  supplies  used  in  research  and  development  laboratory  work,  infrastructure  expenses,  including  allocated  facility  occupancy  and  information
technology costs, contract services, other outside costs and costs to develop our technology capabilities. Research and development expenses also include costs
related to activities performed under contracts with biopharmaceutical companies before technological feasibility has been achieved. Research and development
costs are expensed as incurred. Payments made prior to the receipt of goods or services to be used in research and development are deferred and recognized as
expense in the period in which the related goods are received or services are rendered. Costs to develop our technology capabilities are recorded as research and
development unless they meet the criteria to be capitalized as internal-use software costs. We expect that our research and development expenses will continue to
increase  in  absolute  dollars  as  we  continue  to  innovate  and  develop  additional  products,  expand  our  genomic  and  medical  data  management  resources  and
conduct our ongoing and new clinical trials, with a particular focus on our LUNAR program.

Sales and marketing expense. Our sales and marketing expenses are expensed as incurred and include costs associated with our sales organization, including our
direct  sales  force  and  sales  management,  client  services,  marketing  and  reimbursement,  medical  affairs,  as  well  as  business  development  personnel  who  are
focused on our biopharmaceutical customers. These expenses consist primarily of salaries, commissions, bonuses, employee benefits, travel expenses

88

Table of Contents

and stock-based compensation, as well as marketing and educational activities and allocated overhead expenses. We expect our sales and marketing expenses to
increase in absolute dollars as we expand our sales force, increase our presence within and outside of the United States, and increase our marketing activities to
drive further awareness and adoption of our Guardant360 and GuardantOMNI tests.

General and administrative expense. Our general and administrative expenses include costs for our executive, accounting and finance, legal and human resources
functions.  These  expenses  consist  principally  of  salaries,  bonuses,  employee  benefits,  travel  expenses  and  stock-based  compensation,  as  well  as  professional
services  fees  such  as  consulting,  audit,  tax  and  legal  fees,  and  general  corporate  costs  and  allocated  overhead  expenses.  We  expect  that  our  general  and
administrative  expenses  will  continue  to  increase  in  absolute  dollars,  primarily  due  to  increased  headcount  and  costs  associated  with  operating  as  a  public
company, including expenses related to legal, accounting, regulatory, maintaining compliance with exchange listing and requirements of the SEC, director and
officer  insurance  premiums  and  investor  relations.  These  expenses,  though  expected  to  increase  in  absolute  dollars,  are  expected  to  decrease  modestly  as  a
percentage  of  revenue  in  the  long  term,  though  they  may  fluctuate  as  a  percentage  of  revenue  from  period  to  period  due  to  the  timing  and  extent  of  these
expenses.

Interest income

Interest income consists of interest earned on our cash, cash equivalents and marketable securities.

Interest expense

Interest expense consists primarily of interest from finance leases or capital leases and royalty obligations.

Other income (expense), net

In  the  first  quarter  of  2018,  we  settled  a  commercial  legal  dispute.  In  connection  with  the  settlement,  we  received  a  payment  of  $4.25  million,  which  was
recognized as one-time other income (expense), net for the year ended December 31, 2018.

Other income (expense), net also consists of foreign currency exchange gains and losses. We expect our foreign currency gains and losses to continue to fluctuate
in the future due to changes in foreign currency exchange rates.

Provision for (Benefit from) income tax

Income taxes are recorded using an asset and liability approach. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to
differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases using enacted tax rates in effect for
the year in which the differences are expected to affect taxable income. Tax benefits are recognized when it is more likely than not that a tax position will be
sustained during an audit. Deferred tax assets are reduced by a valuation allowance if current evidence indicates that it is considered more likely than not that
these benefits will not be realized.

Our tax positions are subject to income tax audits. We recognize the tax benefit of an uncertain tax position only if it is more likely than not that the position is
sustainable upon examination by the taxing authority, based on the technical merits. The tax benefit recognized is measured as the largest amount of benefit which
is more likely than not to be realized upon settlement with the taxing authority. We recognize interest accrued and penalties related to unrecognized tax benefits in
its  tax  provision.  We  evaluate  uncertain  tax  positions  on  a  regular  basis.  The  evaluations  are  based  on  a  number  of  factors,  including  changes  in  facts  and
circumstances, changes in tax law, correspondence with tax authorities during the course of the audit, and effective settlement of audit issues. The provision for
(benefit from) income taxes includes the effects of any accruals that we believe are appropriate, as well as the related net interest and penalties.

89

Table of Contents

Results of operations

The following table sets forth the significant components of our results of operations for the periods presented.

Revenue:

Precision oncology testing (1)
Development services (1)

Total revenue

Costs and operating expenses:

Cost of precision oncology testing(2)
Cost of development services
Research and development expense(2)
Sales and marketing expense(2)
General and administrative expense(2)(3)

Total costs and operating expenses

Loss from operations

Interest income

Interest expense

Other income (expense), net

Loss before provision for income taxes

Provision for (benefit from) income taxes

Net loss

(1)

Fiscal year 2018 results do not reflect the impact of the adoption of the new revenue accounting standard in fiscal year 2019.

(2) Amounts include stock-based compensation expense as follows:

Cost of precision oncology testing

Research and development expense

Sales and marketing expense
General and administrative expense(3)

Total stock-based compensation expense

Year Ended December 31,

2019

2018

(in thousands)

$

180,462   $

33,913  

214,375  

62,255  

8,465  

86,292  

78,335  

61,399  

296,746  

(82,371)  

13,741  

(1,181)  

88  

(69,723)  

(1,872)  

$

(67,851)   $

78,407  

12,232  

90,639  

39,846  

3,364  

50,714  

53,465  

36,192  

183,581  

(92,942)  

5,266  

(1,251)  

4,702  

(84,225)  

38  

(84,263)  

Year Ended December 31,

2019

2018

(in thousands)

863   $

5,907  

4,716  

5,468  

16,954   $

512  

1,684  

1,727  

2,928  

6,851  

$

$

(3) Amounts include $157,000 of compensation expenses associated with repurchase of common stock for the year ended December 31, 2018.

90

 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
Table of Contents

Comparison of the Years Ended December 31, 2019 and 2018

Revenue

Precision oncology testing

Development services

Total revenue

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

$

$

180,462   $

33,913  

214,375   $

78,407   $

12,232  

90,639   $

102,055  

21,681  

123,736  

130%

177%

137%

Total revenue was $214.4 million for the year ended December 31, 2019 compared to $90.6 million for the year ended December 31, 2018, an increase of $123.7
million, or 137%.

Precision oncology testing revenue increased to $180.5 million for the year ended December 31, 2019 from $78.4 million for the year ended December 31, 2018,
an increase of $102.1 million, or 130%.

Precision oncology revenue from tests for clinical customers was $101.0 million for the year ended December 31, 2019, up 131.1% from $43.7 million for the
year ended December 31, 2018. This increase in clinical testing revenue was driven primarily by increases in test volume plus higher average revenue per test.
Precision  oncology  revenue  for  the  year  ended  December  31,  2019  included  $6.8  million  of  payments  received  during  that  year  from  successful  appeals  of
payers’ denials of reimbursement for samples processed in 2018. Given the age of the samples associated with these successful appeals, we do not believe this
appeals revenue is indicative of results in the ordinary course of our operations. Precision oncology tests for clinical customers increased to 49,926 for the year
ended December 31, 2019 from 29,238 for the year ended December 31, 2018 (excluding 354 tests in 2018 from a customer that in March 2018 began processing
tests in-house). We believe this volume increase is due to a number of factors including increases in our commercial programs, additional clinical data including
from  the  NILE  study,  and  new  drugs  which  continue  to  expand  the  need  for  comprehensive  genomic  profiling.  Average  revenue  per  test  increased  due  to
reimbursement for testing of most Medicare lung cancer patients starting in the fourth quarter of 2018, increases in commercial payer payments that we believe
were beneficially affected by the Protecting Access to Medicare Act of 2014 (“PAMA”), and the $6.8 million from appeals of samples tested in 2018.

Precision  oncology  revenue  from  tests  for  biopharmaceutical  customers  was  $79.5  million  for  the  year  ended  December  31,  2019,  up  129.1%  from  $34.7
million for the year ended December 31, 2018. Precision oncology tests for biopharmaceutical customers increased to 20,643 for the year ended December 31,
2019 from 10,370 for the year ended December 31, 2018 due to an increase in the number of biopharmaceutical customers and their contracted projects. The
average selling price of precision oncology tests for biopharmaceutical customers was $3,850 for the year ended December 31, 2019, up from $3,347  the  year
ended December 31, 2018,  due  to  a  greater  number  of  such  tests  being  GuardantOMNI  test,  which  has  a  higher  selling  price  than  the  Guardant360  test.  The
change to accounting for revenue under ASC 606 increased precision oncology revenue from tests for pharmaceutical customers by $1.0 million since revenue
under  ASC  605  for  precision  oncology  revenue  from  tests  for  pharmaceutical  customers  for  the  year  ended  December  31,  2019  would  have  been
approximately $78.5 million.

Development services revenue increased to $33.9 million for the year ended December 31, 2019 from $12.2 million for the year ended December 31, 2018, an
increase  of  $21.7 million,  or  177%.  This  increase  in  development  services  revenue  was  due  to  revenue  received  from  new  projects  in  2019  and  was  mainly
received from biopharmaceutical customers related to companion diagnostic development and regulatory approval services.

Costs and operating expenses

Cost of precision oncology testing

Cost of precision oncology testing

$

62,255   $

39,846   $

22,409  

56%

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

91

 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
Table of Contents

Cost of precision oncology testing revenue was $62.3 million for the year ended December 31, 2019 compared to $39.8 million for the year ended December 31,
2018, an increase of $22.4 million, or 56%. This increase in cost of precision oncology testing was primarily due to a $11.2 million increase in material costs, a
$5.2 million increase in labor and manufacturing overhead costs, and a $2.9 million increase in royalties and $3.2 million increase in other costs including costs
related to freight, curation of test results for physicians.

Cost of development services

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

Cost of development services

$

8,465   $

3,364   $

5,101  

152%

Cost  of  development  services  was  $8.5 million  for  the  year  ended  December  31,  2019  compared  to  $3.4 million  for  the  year  ended  December  31,  2018,  an
increase of $5.1 million, or 152%. This increase in cost of development services was primarily due to an increase in labor costs related to companion diagnostic
development and regulatory approval service contracts.

Research and development expense

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

Research and development

$

86,292   $

50,714   $

35,578  

70%

Research and development expenses were $86.3 million for the year ended December 31, 2019 compared to $50.7 million for the year ended December 31, 2018,
an increase of $35.6 million, or 70%. This increase in research and development expense was primarily due to an increase of $14.9 million in personnel-related
costs, an increase of $4.2 million in noncash stock-based compensation for employees in our research and development group, an increase of $2.2 million related
to allocated facilities and information technology infrastructure costs, and a $0.9 million increase in office administrative costs as we increased our headcount to
support continued investment in our technology. The increase is also attributable to an increase of $7.9 million in material costs relating to the development of our
LUNAR programs and the continuous improvement in our Guardant360 and GuardantOMNI liquid biopsy panels, and an increase of $4.9 million in development
consulting fees.

Sales and marketing expense

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

Sales and marketing

$

78,335   $

53,465   $

24,870  

47%

Selling and marketing expenses were $78.3 million for the year ended December 31, 2019 compared to $53.5 million for the year ended December 31, 2018, an
increase of $24.9 million, or 47%. This increase was primarily due to an increase of $15.6 million in personnel-related costs and an increase of $3.0 million in
noncash  stock-based  compensation  associated  with  the  expansion  of  our  commercial  organization,  an  increase  of  $2.9 million  related  to  office  administrative
costs, an increase of $2.3 million in travel expenses, an increase of $0.5 million related to allocated facilities and information technology infrastructure costs, and
an increase of $0.6 million in professional service expenses related to marketing activities.

92

 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
Table of Contents

General and administrative expense

General and administrative

$

61,399   $

36,192   $

25,207  

70%

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

General and administrative expenses were $61.4 million for the year ended December 31, 2019 compared to $36.2 million for the year ended December 31, 2018,
an increase of $25.2 million, or 70%. This increase was primarily due to an increase of $15.6 million  in  personnel-related  costs  including  an  increase  of  $2.5
million in noncash stock-based compensation expense and an increase of $1.2 million in administration expenses as we increased our headcount, and an increase
of $11.9 million  in  professional  service  expenses  related  to  outside  legal,  accounting,  consulting  and  IT  services.  This  increase  was  offset  by  a  $3.0  million
reduction in legal costs due to settlements of a patent lawsuits and commercial legal disputes that were finalized and incurred in 2018.

Interest income

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

Interest income

$

13,741   $

5,266   $

8,475  

161%

Interest income was $13.7 million for the year ended December 31, 2019 compared to $5.3 million for the year ended December 31, 2018, an increase of $8.5
million, or 161%. The increase was primarily due to a higher cash, cash equivalents and marketable securities average balance year over year due to the timing of
receipt of cash proceeds from our initial public offering and the follow-on offering that was completed in May 2019.

Interest expense

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

Interest expense

$

1,181   $

1,251   $

(70)  

(6)%

Interest expense was $1.2 million for the year ended December 31, 2019 compared to $1.3 million for the year ended December  31,  2018,  a  decrease  of  $0.1
million, or 6%. This decrease was primarily due to reduced outstanding balance of an obligation related to a royalty in connection with a patent license agreement
entered into in January 2017.

Other income (expense), net

Other income (expense), net
*    Not meaningful

Year Ended December 31,

Change

2019

2018

$

%

$

88   $

4,702   $

(4,614)  

*

(in thousands)

Other income (expense), net included a gain of $4.3 million for settlement of a commercial legal dispute for the year ended December 31, 2018. There was no
similar charge or gain for the year ended December 31, 2019.

Other income (expense), net also included foreign currency exchange gains of $0.4 million for the year ended December 31, 2018. Foreign currency exchange
gains/losses for the year ended December 31, 2019 was immaterial.

93

 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
Table of Contents

Provision for (benefit from) income taxes

Year Ended December 31,

Change

2019

2018

$

%

(in thousands)

Provision for (benefit from) income taxes

$

(1,872)   $

38   $

(1,910)  

(5,026)%

Benefit from income taxes of $1.9 million for the year ended December 31, 2019 compared to an expense of $38,000 for the year ended December 31, 2018 was
primarily  due  to  the  release  of  valuation  allowance  of  $1.6  million  associated  with  nondeductible  intangible  assets  recorded  as  part  of  the  Bellwether  Bio
acquisition.  Additionally, there was a benefit of $0.4 million associated with the utilization of tax losses from continuing operations against other comprehensive
income gains.

94

 
 
 
 
 
 
 
   
Table of Contents

Quarterly results of operations

The  following  tables  set  forth  our  unaudited  quarterly  consolidated  statements  of  operations  data  for  each  of  the  eight  quarters  in  the  24-month  period  ended
December 31, 2019.  The information for each of these quarters has been prepared in accordance with generally accepted accounting principles in the United
States of America and on the same basis as our audited consolidated financial statements included elsewhere in this Annual Report on Form 10-K. In the opinion
of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of our results of operations. This
data  should  be  read  in  conjunction  with  our  audited  financial  statements  and  related  notes  included  elsewhere  in  this  Annual  Report  on  Form  10-K.  These
quarterly operating results are not necessarily indicative of our operating results for the full year or any future period.

  December 31, 2019

September 30, 2019

June 30,
2019

March 31, 2019

  December 31, 2018

  September 30, 2018  

June 30,
2018

  March 31, 2018

Three Months Ended

Revenue:

Precision oncology testing (1)

Development services (1)

Total revenue

Costs and operating expenses:

Cost of precision oncology testing

Cost of development services

Research and development expense

Sales and marketing expense

General and administrative expense

Total costs and operating expenses

Loss from operations

Interest income

Interest expense

Other income (expense), net

Loss before provision for income taxes

Provision for(benefit from) income taxes

Net loss

Adjustment of redeemable
noncontrolling interest

Net loss attributable to Guardant Health,

Inc.

Net loss attributable to Guardant Health,

Inc. common stockholders

Net loss per share attributable to

Guardant Health, Inc. common
stockholders, basic and diluted

Weighted-average shares used in
computing net loss per share
attributable to Guardant Health, Inc.
common stockholders, basic and
diluted

  $

  $

  $

  $

57,414

  $

52,147

  $

42,064

  $

28,837

  $

28,096

  $

(unaudited)

(in thousands)

5,483

62,897

20,004

1,834

25,875

22,287

18,859

88,859

8,701

60,848

16,578

1,936

24,569

18,802

16,440

78,325

11,911

53,975

14,650

2,183

19,532

19,439

13,439

69,243

7,818

36,655

11,023

2,512

16,316

17,807

12,661

60,319

4,777

32,873

12,624

1,323

16,652

17,114

12,547

60,260

(25,962)

(17,477)

(15,268)

(23,664)

(27,387)

3,871

(321)

(187)

(22,599)

(489)

(22,110)

(3,100)

4,286

(280)

179

(13,292)

(202)

(13,090)

300

3,099

(287)

(51)

(12,507)

(1,207)

(11,300)

(300)

2,485

(293)

147

2,334

(299)

115

(21,325)

(25,237)

26

(21,351)

(4,700)

35

(25,272)

150

18,298   $
3,394  
21,692  

17,822   $
1,560  
19,382  

9,671  
380  
14,253  
13,464  
8,129  
45,897  
(24,205)  
958  
(304)  
43  
(23,508)  
—  
(23,508)  

(950)  

9,506  
453  
11,554  
11,575  
8,997  
42,085  
(22,703)  
989  
(317)  
395  
(21,636)  
3  
(21,639)  

—  

(25,210)

(25,210)

  $

  $

(12,790)

(12,790)

  $

  $

(11,600)

(11,600)

  $

  $

(26,051)

(26,051)

  $

  $

(25,122)

(25,122)

  $

  $

(24,458)   $

(21,639)   $

(24,458)   $

(21,639)   $

14,191

2,501

16,692

8,045

1,208

8,255

11,312

6,519

35,339

(18,647)

985

(331)

4,149

(13,844)

—

(13,844)

—

(13,844)

(13,844)

(0.27)

  $

(0.14)

  $

(0.13)

  $

(0.30)

  $

(0.30)

  $

(1.94)   $

(1.75)   $

(1.16)

93,997

93,303

89,036

85,935

84,123

12,582  

12,388  

11,920

(1) Quarterly periods in 2018 do not reflect the adoption of the new revenue accounting standards in 2019.

95

 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Liquidity and capital resources

We have incurred losses and negative cash flows from operations since our inception, and as of December 31, 2019, we had an accumulated deficit of $352.8
million. We expect to incur additional operating losses in the near future and our operating expenses will increase as we continue to invest in clinical trials and
develop new product offerings from our research programs, including our LUNAR program, expand our sales organization, and increase our marketing efforts to
drive  market  adoption  of  our  Guardant360  and  GuardantOMNI  tests.  As  demand  for  our  Guardant360  and  GuardantOMNI  tests  are  expected  to  continue  to
increase from physicians and biopharmaceutical companies, we anticipate that our capital expenditure requirements will also increase in order to build additional
capacity.

We  have  funded  our  operations  to  date  principally  from  the  sale  of  stock  and  revenue  from  precision  oncology  testing  and  development  services.  As  of
December 31, 2019, we had cash and cash equivalents of $143.2 million and marketable securities of $648.4 million. Cash in excess of immediate requirements is
invested  in  accordance  with  our  investment  policy,  primarily  with  a  view  to  liquidity  and  capital  preservation.  Currently,  our  funds  are  held  in  marketable
securities consisting of United States treasury securities and corporate bonds.

Based on our current business plan, we believe our current cash, cash equivalents and marketable securities and anticipated cash flow from operations will be
sufficient to meet our anticipated cash requirements over at least the next 12 months from the date of this Annual Report on Form 10-K. We may consider raising
additional  capital  to  expand  our  business,  to  pursue  strategic  investments,  to  take  advantage  of  financing  opportunities  or  for  other  reasons.  As  revenue  from
precision oncology testing and development service is expected to grow, we expect our accounts receivable and inventory balances to increase. Any increase in
accounts receivable and inventory may not be completely offset by increases in accounts payable and accrued expenses, which could result in greater working
capital requirements.

If our available cash, cash equivalents and marketable securities and anticipated cash flow from operations are insufficient to satisfy our liquidity requirements
including  because  of  lower  demand  for  our  products  as  a  result  of  lower  than  currently  expected  rates  of  reimbursement  from  our  customers  or  other  risks
described  in  this  Annual  Report  on  Form  10-K,  we  may  seek  to  sell  additional  common  or  preferred  equity  or  convertible  debt  securities,  enter  into  a  credit
facility  or  another  form  of  third-party  funding  or  seek  other  debt  financing.  The  sale  of  equity  and  convertible  debt  securities  may  result  in  dilution  to  our
stockholders and, in the case of preferred equity securities or convertible debt, those securities could provide for rights, preferences or privileges senior to those of
our common stock. The terms of debt securities issued or borrowings pursuant to a credit agreement could impose significant restrictions on our operations. If we
raise funds through collaborations and licensing arrangements, we might be required to relinquish significant rights to our platform technologies or products or
grant licenses on terms that are not favorable to us. Additional capital may not be available to us on reasonable terms, or at all.

Cash flows

The following table summarizes our cash flows for the periods presented:

Cash used in operating activities

Cash used in investing activities

Cash provided by financing activities

Operating activities

Year Ended December 31,

2019

2018

(in thousands)

$

(47,134)   $

(317,570)  

367,304  

(72,185)  

(153,028)  

293,161  

Cash used in operating activities during the year ended December 31, 2019 was $47.1 million, which resulted from a net loss of $67.9 million and net change in
our operating assets and liabilities of $6.1 million, partially offset by non-cash charges of $26.8 million. Non-cash charges primarily consisted of $11.4 million of
depreciation and amortization and $17.0 million of stock-based compensation, partially offset by $2.3 million of amortization of discount on investment. The net
change in our operating assets and liabilities was primarily the result of a $7.4 million increase in accounts receivable driven by higher sales to biopharmaceutical
customers and adoption of ASC 606, a $6.2 million increase in prepaid expenses and other current assets, a $6.0 million increase in inventory to support testing
volumes, a $2.9 million increase in other assets for security deposits relating to new leases entered into in 2019 and a $3.9 million decrease in deferred revenue
partially offset by a $9.2 million increase in accrued expenses and other current liabilities,

96

 
 
 
 
 
Table of Contents

a $5.6 million increase in accrued compensation due to increased personnel, a $4.3 million increase in accounts payable and a $1.0 million increase in operating
lease liabilities as a result of the adoption of ASC 842.

Cash used in operating activities during the year ended December 31, 2018 was $72.2 million, which resulted from a net loss of $84.3 million and net change in
our operating assets and liabilities of $1.1 million, partially offset by non-cash charges of $13.2 million. Non-cash charges primarily consisted of $7.1 million of
depreciation and amortization and $6.9 million of stock-based compensation, partially offset by $0.4 million of amortization of discount on investment. The net
change  in  our  operating  assets  and  liabilities  was  primarily  the  result  of  a  $22.9  million  increase  in  accounts  receivable  driven  by  higher  sales  to
biopharmaceutical customers, a $3.7 million increase in prepaid expenses and other current assets and a $1.8 million increase in inventory due to higher testing
volumes, partially offset by a $13.0 million increase in deferred revenue, an $8.1 million increase in accrued compensation due to increased personnel, a $5.0
million increase in accounts payable and a $1.3 million increase in deferred rent.

Investing activities

Cash used in investing activities during the year ended December 31, 2019 was $317.6 million, which resulted primarily from purchases of marketable securities
of $614.3 million, purchases of property and equipment of $18.7 million purchase of business of $7.3 million and purchase of intangible assets of $2.5 million,
partially offset by our proceeds from the maturities of marketable securities of $325.3 million.

Cash used in investing activities during the year ended December 31, 2018 was $153.0 million, which resulted primarily from purchases of marketable securities
of  $287.5  million  and  purchases  of  property  and  equipment  of  $20.2  million,  partially  offset  by  our  proceeds  from  the  maturities  of  marketable  securities
of $154.6 million.

Financing activities

Cash provided by financing activities during the year ended December 31, 2019 was $367.3 million which was primarily due to proceeds of $350.4 million from
the  follow-on  offering  completed  in  May  2019,  and  receipt  of  proceeds  of  $18.0 million  from  issuance  of  common  stock  upon  exercise  of  stock  options  and
issuance of shares under our ESPP.

Cash provided by financing activities during the year ended December 31, 2018 was $293.2 million, which was primarily due to proceeds from the IPO of $254.0
million, net of underwriting discounts and commissions, and net proceeds from sale of equity interests in noncontrolling interests of $41.0 million.

Contractual obligations and commitments

Our contractual commitments will have an impact on our future liquidity. The following table summarizes our contractually committed future obligations as of
December 31, 2019:

Total

Less than
 1 year

1-3 years

3-5 years

  More than 5 years

Payments due by period

Operating lease obligations (1) (2)
Royalty obligation (3)

Total

$

$

65,425   $

11,775  

77,200   $

(in thousands)

8,408   $

1,402  

9,810   $

18,630   $

3,084  

21,714   $

19,473   $

3,364  

22,837   $

18,914

3,925

22,839

(1) We lease our office and laboratory space in Redwood City, California, and office space in Spring City, Texas and Seattle, Washington under operating leases that expire between January 2021 - November 2027.

We also have operating leases for manufacturing and office equipment through March 2023.

(2)

Includes payments relating to a facility agreement entered into as of December 31, 2019 for a lease commencing in 2020 net of sublease income of $0.1 million.

(3) We have patent license agreements with four parties. Under these agreements, we have made one-time and milestone license fee payments that we have capitalized and are amortizing to expense ratably over the
useful life of the applicable underlying patent rights. Under some of these agreements, we are obligated to pay low single-digit percentage running royalties on net sales where the patent right(s) are used in the
product or service sold, subject to minimum annual royalties or fees in certain agreements.

97

 
 
 
 
 
 
Off-balance sheet arrangements

As of December 31, 2019, we have not had any off-balance sheet arrangements as defined in the rules and regulations of the SEC.

Critical accounting policies and estimates

We  have  prepared  our  financial  statements  in  accordance  with  accounting  principles  generally  accepted  in  the  United  States  of  America  (“GAAP”).  Our
preparation of these financial statements requires us to make estimates, assumptions and judgments that affect the reported amounts of assets, liabilities, expenses
and related disclosures at the date of the financial statements, as well as revenue and expenses recorded during the reporting periods. We evaluate our estimates
and  judgments  on  an  ongoing  basis.  We  base  our  estimates  on  historical  experience  and  on  various  other  factors  that  we  believe  are  reasonable  under  the
circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other
sources. Actual results could therefore differ materially from these estimates under different assumptions or conditions.

While our significant accounting policies are described in more detail in Note 2 to our consolidated financial statements included 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 financial statements.

Revenue recognition

We derive revenue from the provision of precision oncology testing services provided to our ordering physicians and biopharmaceutical customers, as well as
from biopharmaceutical research and development services provided to our biopharmaceutical customers. Precision oncology services include genomic profiling
and  the  delivery  of  other  genomic  information  derived  from  our  platform.  Development  services  include  companion  diagnostic  development,  information
solutions  and  laboratory  services.  We  currently  receive  payments  from  commercial  third-party  payors,  certain  hospitals  and  oncology  centers  and  individual
patients, as well as biopharmaceutical companies and research institutes.

Effective January 1, 2019, we began recognizing revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers, or ASC 606. Revenues
are recognized when control of services is transferred to customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those
services. ASC 606 provides for a five-step model that includes identifying the contract with a customer, identifying the performance obligations in the contract,
determining  the  transaction  price,  allocating  the  transaction  price  to  the  performance  obligations,  and  recognizing  revenue  when,  or  as,  an  entity  satisfies  a
performance obligation.

Precision oncology testing

We  recognize  revenue  from  the  sale  of  our  precision  oncology  tests  for  clinical  customers,  including  certain  hospitals,  cancer  centers,  other  institutions  and
patients,  at  the  time  results  of  the  test  are  reported  to  physicians.  Most  precision  oncology  tests  requested  by  clinical  customers  are  sold  without  a  written
agreement; however, we determine an implied contract exists with our clinical customers. We identify each sale of our liquid biopsy test to clinical customer as a
single performance obligation. With the exception of certain limited contracted arrangements with insurance carriers and other institutions where the transaction
price  is  fixed,  a  stated  contract  price  does  not  exist  and  the  transaction  price  for  each  implied  contract  with  our  clinical  customers  represents  variable
consideration. We estimate the variable consideration under the portfolio approach and consider the historical reimbursement data from third-party payers and
patients, as well as known current or anticipated reimbursement trends not reflected in the historical data. We monitor the estimated amount to be collected in the
portfolio at each reporting period based on actual cash collections in order to assess whether a revision to the estimate is required. Both the estimate and any
subsequent revision contain uncertainty and require the use of judgment in the estimation of the variable consideration and application of the constraint for such
variable consideration.

Revenue from sales of precision oncology tests to biopharmaceutical customers are based on a negotiated price per test or on the basis of an agreement to provide
certain testing volume over a defined period. We identify our promise to

98

Table of Contents

transfer a series of distinct liquid biopsy tests to biopharmaceutical customers as a single performance obligation. Precision oncology tests to biopharmaceutical
customers are generally billed at a fixed price for each test performed. For agreements involving testing volume to be satisfied over a defined period, revenue is
recognized over time based on the number of tests performed as the performance obligation is satisfied over time.

Results of our precision oncology services are delivered electronically, and as such there are no shipping or handling fees incurred by us or billed to customers.

Development services

We perform development services for our biopharmaceutical customers utilizing our precision oncology information platform. Development services typically
represent a single performance obligation as we perform a significant integration service, such as analytical validation and regulatory submissions. The individual
promises  are  not  separately  identifiable  from  other  promises  in  the  contracts  and,  therefore,  are  not  distinct.  However,  under  certain  contracts,  a
biopharmaceutical customer may engage us for multiple distinct development services which are both capable of being distinct and separately identifiable from
other promises in the contracts and, therefore, distinct performance obligations.

We collaborate with pharmaceutical companies in the development and clinical trials of new drugs. As part of these collaborations, we provide services related to
regulatory  filings  with  the  FDA  to  support  companion  diagnostic  device  submissions  for  our  liquid  biopsy  panels.  Under  these  collaborations,  we  generate
revenue  from  achievement  of  milestones,  as  well  as  provision  of  on-going  support.  These  collaboration  arrangements  include  no  royalty  obligations.  For
development  services  performed,  we  are  compensated  through  a  combination  of  an  upfront  fee  and  performance-based  non-refundable  regulatory  and  other
developmental milestone payments. The transaction price of our development services contracts typically represents variable consideration. Application of the
constraint  for  variable  consideration  to  milestone  payments  is  an  area  that  requires  significant  judgment.  We  evaluate  factors  such  as  the  scientific,  clinical,
regulatory, commercial, and other risks that must be managed to achieve the respective milestone and the level of effort and investment required to achieve the
respective  milestone.  In  making  this  assessment,  we  consider  our  historical  experience  with  similar  milestones,  the  degree  of  complexity  and  uncertainty
associated  with  each  milestone,  and  whether  achievement  of  the  milestone  is  dependent  on  parties  other  than  us.  The  constraint  for  variable  consideration  is
applied such that it is probable a significant reversal of revenue will not occur when the uncertainty associated with the contingency is resolved. Application of
the constraint for variable consideration is updated at each reporting period as a revision to the estimated transaction price. We recognize development services
revenue over the period in which biopharmaceutical research and development services are provided. Specifically, we recognize revenue using an input method to
measure progress, utilizing costs incurred to-date relative to total expected costs as its measure of progress. For development of new products or services under
these arrangements, costs incurred before technological feasibility is reached are included as research and development expenses in our consolidated statements
of operations, while costs incurred thereafter are recorded as cost of development services.

Contracts with multiple performance obligations

Contracts  with  biopharmaceutical  customers  may  include  multiple  distinct  performance  obligations,  such  as  provision  of  precision  oncology  testing,
biopharmaceutical  research  and  development  services,  and  clinical  trial  enrollment  assistance,  among  others.  We  evaluate  the  terms  and  conditions  included
within our contracts with biopharmaceutical customers to ensure appropriate revenue recognition, including whether services are considered distinct performance
obligations that should be accounted for separately versus together. We first identify material promises, in contrast to immaterial promises or administrative tasks,
under  the  contract  and  then  evaluates  whether  these  promises  are  both  capable  of  being  distinct  and  distinct  within  the  context  of  the  contract.  In  assessing
whether a promised service is capable of being distinct, we consider whether the customer could benefit from the service either on its own or together with other
resources that are readily available to the customer, including factors such as the research, development, and commercialization capabilities of a third party and
the availability of the associated expertise in the general marketplace. In assessing whether a promised service is distinct within the context of the contract, we
consider whether we provide a significant integration of the services, whether the services significantly modify or customize one another, or whether the services
are highly interdependent or interrelated.

For  contracts  with  multiple  performance  obligations,  the  transaction  price  is  allocated  to  the  separate  performance  obligations  on  a  relative  standalone  selling
price basis. We determine standalone selling price by considering the historical selling price of these performance obligations in similar transactions as well as
other  factors,  including,  but  not  limited  to,  the  price  that  customers  in  the  market  would  be  willing  to  pay,  competitive  pricing  of  other  vendors,  industry
publications and current pricing practices, and expected costs of satisfying each performance obligation plus appropriate margin.

99

Table of Contents

Variable interest entity

We review agreements we enter into with third party entities, pursuant to which we may have a variable interest in the entity, in order to determine if the entity is
a variable interest entity, or VIE. If the entity is a VIE, we assess whether or not we are the primary beneficiary of that entity. In determining whether we are the
primary  beneficiary  of  an  entity,  we  apply  a  qualitative  approach  that  determines  whether  we  have  both  (1)  the  power  to  direct  the  economically  significant
activities of the entity and (2) the obligation to absorb losses of, or the right to receive benefits from, the entity that could potentially be significant to that entity.
If we determine we are the primary beneficiary of a VIE, we consolidate the statements of operations and financial condition of the VIE into our consolidated
financial statements. Accounting for the consolidation is based on our determination if the VIE meets the definition of a business or and asset. Assets, liabilities
and  noncontrolling  interests,  excluding  goodwill,  of  VIEs  that  are  not  determined  to  be  businesses  are  recorded  at  fair  value  in  our  financial  statements  upon
consolidation. Assets and liabilities that we have transferred to a VIE, after, or shortly before the date we became the primary beneficiary are recorded at the same
amount at which the assets and liabilities would have been measured if they had not been transferred. Our determination about whether we should consolidate
such VIEs is made continuously as changes to existing relationships or future transactions may result in a consolidation or deconsolidation event.

In May 2018, we and SoftBank formed and capitalized the Joint Venture for the sale, marketing and distribution of our tests in the JV Territory. We expect to rely
on the Joint Venture to accelerate commercialization of our products in Asia, the Middle East and Africa, with an initial focus on Japan. As of March 31, 2018,
the Joint Venture is deemed to be a VIE and we are identified as the primary beneficiary of the VIE. Consequently, we have consolidated the financial position,
results of operations and cash flows of the Joint Venture in our financial statements and all intercompany balances have been eliminated in consolidation.

The joint venture agreement also includes a put-call arrangement with respect to the shares of the Joint Venture held by SoftBank and its affiliates. SoftBank will
have a put right to cause us to purchase all shares of the Joint Venture held by SoftBank and its affiliates, and we will have a call right to purchase all such shares
in the event of (i) certain material disagreement relating to the Joint Venture or its business that may seriously affect the ability of the Joint Venture to perform its
obligations under the joint venture agreement or may otherwise seriously impair the ability of the Joint Venture to conduct its business in an effective matter,
other than one relating to the Joint Venture’s business plan or to factual matters that may be capable of expert determination; (ii) the effectiveness of our initial
public offering, a change in control, the seventh anniversary of the formation of the Joint Venture, or each subsequent anniversary of each of the foregoing events;
or (iii) a material breach of the joint venture agreement by the other party that goes unremedied within 20 business days. Unless the shares of the Joint Venture are
publicly traded and listed on a nationally recognized stock exchange, the purchase price per share of the Joint Venture in these situations will be determined by a
third-party valuation firm on the assumption that the sale is on an arm’s-length basis on the date of the put or call notice. The third-party valuation firm may
evaluate a range of factors and employ assumptions that are subjective in nature, which could result in the fair value of SoftBank’s interest in the Joint Venture
being  determined  to  be  materially  different  from  what  has  been  recorded  in  our  consolidated  financial  statements,  including  those  included  elsewhere  in  this
Annual Report on Form 10-K.

In the event we exercise our call right, the fair value of the Joint Venture will be deemed to be no less than an amount that yields a 20% internal rate of return on
each tranche of capital invested by SoftBank and its affiliates in the Joint Venture, taking into account all proceeds received by SoftBank and its affiliates arising
from their shares through such date.

In the event SoftBank exercises its put right and the fair value of the Joint Venture is determined to be greater than 40% of our fair value, we will only be required
to purchase the number of shares of the Joint Venture held by SoftBank and its affiliates having an aggregate value equal to the product of 40% of our fair value
and the pro rata portion of the outstanding shares of the Joint Venture held by SoftBank and its affiliates.

We may pay the purchase price for the shares of the Joint Venture in cash, in shares of our common stock, or in a combination thereof. In the event we exercise
the  call  right,  SoftBank  will  choose  the  form  of  consideration.  In  the  event  SoftBank  exercises  the  put  right,  we  will  choose  the  form  of  consideration.  The
noncontrolling interest held by SoftBank contains embedded put-call redemption features that are not solely within our control and has been classified outside of
permanent equity in our consolidated balance sheets. The put-call feature embedded in the redeemable noncontrolling interest do not currently require bifurcation
as it does not meet the definition of a derivative and is considered to be clearly and closely related to the redeemable noncontrolling interest. The noncontrolling
interest is considered probable of becoming redeemable as SoftBank has the option to exercise its put right to sell its equity

100

Table of Contents

ownership in the Joint Venture to us on or after the seventh anniversary of the formation of the Joint Venture, on each subsequent anniversary of the IPO and
under certain other circumstances. We elected to recognize the change in redemption value immediately as they occur as if the put-call redemption feature were
exercisable at the end of the reporting period.

Stock-based compensation

After  the  adoption  of  Accounting  Standards  Update  2018-07,  Compensation—Stock  Compensation  (Topic  718):  Improvements  to  Nonemployee  Share-Based
Payment Accounting on January 1, 2019, we measure stock-based compensation expense for stock options granted to our employees, directors, and nonemployee
consultants on the date of grant and recognize the corresponding compensation expense of those awards over the period that the related services are rendered,
which  is  generally  the  vesting  period  of  the  respective  award.  Compensation  expense  for  stock  options  with  performance  metrics  is  calculated  based  upon
expected achievement of the metrics specified in the grant.

We estimate the fair value of stock options granted to our employees, directors, nonemployee consultants and purchase rights under our 2018 Employee Stock
Purchase Plan on the grant date using the Black-Scholes option-pricing model. The Black-Scholes option-pricing model requires the use of assumptions regarding
a number of variables that are complex, subjective and generally require significant judgment to determine. The assumptions used to calculate the fair value of
our stock options were:

Expected term

Our  expected  term  represents  the  period  that  our  stock  options  are  expected  to  be  outstanding.  After  the  adoption  of  Accounting  Standards  Update  2018-07,
Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting on January 1, 2019, the expected term of
stock options issued to employees and nonemployee consultants is determined using the simplified method (based on the mid-point between the vesting date and
the end of the contractual term), as we do not have sufficient historical data to use any other method to estimate expected term.

Expected volatility

Prior to the commencement of trading of our common stock on the Nasdaq Global Select Market on October 4, 2018 in connection with the IPO, there was no
active trading market for our common stock. Due to limited historical data for the trading of our common stock, expected volatility is estimated based on the
average  volatility  for  comparable  publicly  traded  peer  group  companies  in  the  same  industry  plus  our  expected  volatility  for  the  available  periods.  The
comparable companies are chosen based on their similar size, stage in the life cycle or area of specialty.

Risk-free interest rate

The risk-free interest rate is based on the U.S. treasury zero coupon issues in effect at the time of grant for periods corresponding with the expected term of the
stock option grants.

Expected dividend yield

We have never paid dividends on our common stock and have no plans to pay dividends on our common stock. Therefore, we use an expected dividend yield of
zero.

101

Table of Contents

Black-Scholes assumptions

The  weighted-average  assumptions  used  in  our  Black-Scholes  option-pricing  model  were  as  follows  for  stock  option  granted  to  our  employees,  directors  and
nonemployees for the periods presented:

Expected term (in years)

Expected volatility

Risk-free interest rate

Expected dividend yield

Year Ended December 31,

2019

2018

2017

5.50 – 6.22

63.2% – 68.7%

1.6% – 2.7%

—%

5.01 – 6.51

68.7% – 78.8%

2.5% – 3.0%

—%

6.02 – 6.08

74.1% – 75.1%

1.9% – 2.2%

—%

We  recognize  stock-based  compensation  expense  net  of  forfeitures  as  they  occur  in  accordance  with  Accounting  Standards  Update  2016-09,  Compensation -
Stock Compensation (Topic 718).

We will continue to use judgment in evaluating the assumptions related to our stock-based compensation on a prospective basis. As we continue to accumulate
additional  data  related  to  our  common  stock,  we  may  have  refinements  to  our  estimates,  which  could  materially  impact  our  future  stock-based  compensation
expense.

Recent accounting pronouncements

See Note 2, Summary of Significant Accounting Policies, to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K for
more information.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to market risk in the ordinary course of our business. Market risk represents the risk of loss that may impact our financial position due to adverse
changes in financial market prices and rates.

Interest rate risk

We are exposed to market risk for changes in interest rates related primarily to our cash and cash equivalents, marketable securities and our indebtedness. As of
December 31, 2019, we had cash and cash equivalents of $143.2 million held primarily in cash deposits and money market funds. Our marketable securities are
held in U.S. government debt securities, U.S. government agency bonds and corporate bonds. As of December 31, 2019, we invested in short-term marketable
securities of $379.6 million and long-term marketable securities of $268.8 million. Our primary exposure to market risk is interest income sensitivity, which is
affected by changes in the general level of the interest rates in the United States. As of December 31, 2019, a hypothetical 100 basis point increase in interest rates
would have resulted in an approximate $5.5 million decline of the fair value of our available-for-sale securities. This estimate is based on a sensitivity model that
measures market value changes when changes in interest rates occur.

Foreign currency risk

The majority of our revenue is generated in the United States. Through December 31, 2019, we have generated an insignificant amount of revenues denominated
in foreign currencies. As we expand our presence in the international market, our results of operations and cash flows are expected to increasingly be subject to
fluctuations  due  to  changes  in  foreign  currency  exchange  rates  and  may  be  adversely  affected  in  the  future  due  to  changes  in  foreign  exchange  rates.  Our
obligation related to a royalty denominated in Euros is subject to foreign currency risk. As of December 31, 2019, the effect of a hypothetical 10% change in
foreign currency exchange rates would result in a foreign exchange gains or losses of $1.3 million, on total cumulative balance of obligations. To date, we have
not entered into any hedging arrangements with respect to foreign currency risk. As our international operations grow, we will continue to reassess our approach
to manage our risk relating to fluctuations in currency rates.

102

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 8. Financial Statements and Supplementary Data

Guardant Health, Inc.

Index to Consolidated Financial Statements

As of December 31, 2019 and 2018, and

For the Years Ended December 31, 2019, 2018 and 2017

Report of Independent Registered Public Accounting Firm

Consolidated Balance Sheets

Consolidated Statements of Operations

Consolidated Statements of Comprehensive Loss

Consolidated Statements of Redeemable Noncontrolling Interest and Stockholders' Equity

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

Page

104

106

108

109

110

112

114

The  supplementary  financial  information  required  by  this  Item  8  is  included  in  Part  II,  Item  7  under  the  caption  “Quarterly Results of Operations”,  which  is
incorporated herein by reference.

103

 
Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of

Guardant Health, Inc.

Opinion on the Financial Statements

We  have  audited  the  accompanying  consolidated  balance  sheets  of  Guardant  Health,  Inc.  (the  Company)  as  of  December  31,  2019  and  2018,  the  related
consolidated statements of operations, comprehensive loss, redeemable noncontrolling interest and stockholders’ equity and cash flows for each of the three years
in the period ended December 31, 2019, and the related notes (collectively referred to as the “consolidated financial statements“). In our opinion, the consolidated
financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2019 and 2018, and the results of its operations
and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal
control  over  financial  reporting  as  of  December  31,  2019,  based  on  criteria  established  in  Internal  Control-Integrated  Framework  issued  by  the  Committee  of
Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated March 2, 2020 expressed an unqualified opinion thereon.

Adoption of ASU No. 2014-09

As  discussed  in  Note  2  to  the  consolidated  financial  statements,  the  Company  changed  its  method  for  recognizing  revenue  as  a  result  of  the  adoption  of
Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606), effective January 1, 2019.

Basis for Opinion

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

We  conducted  our  audits  in  accordance  with  the  standards  of  the  PCAOB.  Those  standards  require  that  we  plan  and  perform  the  audit  to  obtain  reasonable
assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to
assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such
procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating
the  accounting  principles  used  and  significant  estimates  made  by  management,  as  well  as  evaluating  the  overall  presentation  of  the  financial  statements.  We
believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to
be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) 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 matters below, providing separate opinions on the critical audit matters or on the
accounts or disclosures to which they relate.

Precision Oncology Revenue (testing services provided to ordering physicians)

Description of the Matter

For the year ended December 31, 2019, revenue recognized from Precision Oncology was $180.5 million. As described in Note 2 to the consolidated financial
statements, the Company recognizes revenue from the performance of precision oncology tests for clinical customers upon delivery of test results to the ordering
physician. As most precision oncology tests requested by customers are sold based on a physician requisition form without further written terms and conditions,
the Company determined an implied contract exists with its patients and estimates variable consideration to be received

104

for these services. Management estimates variable consideration based on historical payment data from third-party payers and patients adjusted for known and
forecasted changes in payment patterns and subject to a constraint such that revenue recognized is not expected to be reversed.

Auditing the Company’s estimate of total consideration expected to be received for the precision oncology tests is complex and requires significant judgment to
evaluate management’s estimate of payments to be received for the tests. This estimate is affected by assumptions on coverage of the tests for the patient and
experience with collection from third-party payors.

How We Addressed the Matter in Our Audit

We obtained an understanding, evaluated the design, and tested the operating effectiveness of internal controls that address the risks of material misstatement
relating to the measurement of precision oncology revenues based upon estimating variable consideration. This included testing controls relating to management’s
review of the significant assumptions described above and inputs used in the determination of the estimated amount that would be collected for tests performed
during the period. We also tested controls over the current and historical data used by management in determining this estimate of variable consideration, subject
to a constraint, including the completeness and accuracy of the data.

Our  audit  procedures  over  the  Company’s  precision  oncology  revenue  included,  among  others,  assessing  assumptions  and  inputs  described  above,  testing  the
completeness and accuracy of the underlying data used by the Company in its analysis, including the constraint applied. We agreed the terms and conditions of
the type of test (i.e. lung, non-lung, etc.) to be performed to the requisition forms submitted by the physician. We compared the significant assumptions and inputs
used by management to the Company’s third-party payor collection trends and other relevant factors. This included testing inputs to the calculation by comparing
historical information to source documents and evaluating the historical accuracy of management's estimates by comparing such estimates to actual results.

Valuation of Redeemable Non-Controlling Interest

Description of the Matter

As described in Note 3 to the consolidated financial statements, in May 2018, the Company entered into an agreement with an entity affiliated with SoftBank, a
related party, to establish a Joint Venture to distribute the Company’s tests in certain markets outside the United States. The Company is consolidating the Joint
Venture and as part of the accounting for the redeemable noncontrolling interest (NCI) held by Softbank, management is carrying the NCI at its fair value as the
agreement has a put feature which contractually allows Softbank to return the NCI interest back to the Company. The fair value of the NCI was determined using
two valuation models the income approach and the market approach. Determining the fair value of the NCI requires judgment and the use of significant estimates
and assumptions, such as, discount rate and exit multiple rate. The discount rate is applied to calculate the present value the expected future cash flows of the
Joint Venture. The selection of exit multiple rate establishes an exit event (i.e. sale or initial public offering) of the Joint Venture. These significant estimates and
assumptions are forward looking and could be affected by future economic and market conditions. At December 31, 2019, the Company’s non-controlling interest
was $49.6 million.

How We Addressed the Matter in Our Audit

We obtained an understanding, evaluated the design and tested the operating effectiveness of the Company’s controls over the fair value estimation of the NCI.
We tested controls over the selection and application of the valuation models and the underlying significant estimates and assumptions noted above.

To test the estimated fair value of the NCI, our audit procedures included, among others, involvement of our valuation specialist to assist us in the evaluation of
the Company’s valuation methodology and testing of the significant estimates and assumptions. For example, we compared the discount rate to industry trends
and market conditions and the exit multiple rate to the comparable public companies. We also compared the revenue forecast to evidence of approval by the Joint
Venture board of directors.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2015.

Redwood City, California

March 2, 2020

105

Guardant Health, Inc.

Consolidated Balance Sheets
(in thousands, except share and per share data)

As of December 31,

2019

2018

ASSETS

Current assets:

Cash and cash equivalents

Short-term marketable securities

Accounts receivable

Inventory

Prepaid expenses and other current assets

Total current assets

Long-term marketable securities

Property and equipment, net

Right-of-use assets

Intangible assets, net

Goodwill

Capitalized license fees

Other assets

Total Assets(1)(2)

$

143,228   $

379,574  

47,986  

15,181  

11,389  

597,358  

268,783  

43,668  

29,140  

8,524  

3,290  

6,890  

4,882  

$

962,535   $

LIABILITIES, REDEEMABLE NONCONTROLLING INTEREST AND STOCKHOLDERS’ EQUITY  

Current liabilities:

Accounts payable

Accrued compensation

Accrued expenses

Deferred revenue

Total current liabilities

Long-term operating lease liabilities

Deferred rent, net of current portion

Obligation related to royalty

Other long-term liabilities
Total Liabilities(1)(2)

Commitments and contingencies (Note 10)

Redeemable noncontrolling interest

$

16,197   $

18,557  

25,703  

12,277  

72,734  

33,256  

—  

6,880  

1,672  

114,542  

49,600  

41,800

106

140,544

278,417

35,690

9,136

5,204

468,991

77,563

31,003

—

—

—

7,800

2,046

587,403

10,642

12,986

7,178

16,138

46,944

—

7,844

7,338

325

62,451

 
 
 
 
   
 
   
   
 
   
 
Stockholders’ equity:

Preferred stock, par value of $0.00001 per share; 10,000,000 shares authorized, no shares issued and

outstanding as of December 31, 2019 and 2018

Common stock, par value of $0.00001 per share; 350,000,000 and 350,000,000 shares authorized as of

December 31, 2019 and 2018, respectively; 94,261,414 and 85,832,454 shares issued and outstanding as
of December 31, 2019 and 2018, respectively

Additional paid-in capital

Accumulated other comprehensive gain (loss)

Accumulated deficit

Total Stockholders’ Equity

—  

1  

1,150,090  

1,111  

(352,809)  

798,393  

Total Liabilities, Redeemable Noncontrolling Interest and Stockholders’ Equity

$

962,535   $

—

1

764,033

(83)

(280,799)

483,152

587,403

(1)  As  of  December  31,  2019  and  2018,  includes  $45.1  million  and  $48.3  million  of  assets,  respectively,  that  can  be  used  only  to  settle  obligations  of  the
consolidated variable interest entity (“VIE”) and VIE’s subsidiaries, and $5.7 million and $1.2 million of liabilities, respectively, of the consolidated VIE  of
liabilities  of  consolidated  VIE  and  VIE’s  subsidiaries  for  which  their  creditors  do  not  have  recourse  to  the  general  credit  of  the  Company.  See  Note  3,
Investment in Joint Venture.

(2) Fiscal 2018 does not reflect the impact of the adoption of the new revenue accounting and lease accounting standards in fiscal year 2019.

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

107

 
   
Table of Contents

Revenue:

Precision oncology testing (1)
Development services (1)

Total revenue

Costs and operating expenses:

Cost of precision oncology testing

Cost of development services

Research and development expense

Sales and marketing expense

General and administrative expense

Total costs and operating expenses

Loss from operations

Interest income

Interest expense

Loss on debt extinguishment

Other income (expense), net

Loss before provision for income taxes

Provision for (benefit from) income taxes

Net loss

Adjustment of redeemable noncontrolling interest

Net loss attributable to Guardant Health, Inc.

Guardant Health, Inc.

Consolidated Statements of Operations
(in thousands, except per share data)

Year Ended December 31,

2019

2018

2017

  $

180,462   $

33,913  

214,375  

62,255  

8,465  

86,292  

78,335  

61,399  

296,746  

(82,371)  

13,741  

(1,181)  

—  

88  

(69,723)  

(1,872)  

(67,851)  

(7,800)  

78,407   $

12,232  

90,639  

39,846  

3,364  

50,714  

53,465  

36,192  

183,581  

(92,942)  

5,266  

(1,251)  

—  

4,702  

(84,225)  

38  

(84,263)  

(800)  

  $

(75,651)   $

(85,063)   $

—  

—  

—  

—  

  $

  $

(75,651)   $

(85,063)   $

(0.84)   $

(2.80)   $

90,597  

30,403  

42,088

7,754

49,842

28,883

2,735

25,562

32,497

36,777

126,454

(76,612)

2,234

(2,702)

(5,075)

(1,059)

(83,214)

7

(83,221)

—

(83,221)

(4,716)

(1,058)

(88,995)

(7.07)

12,582

Deemed dividend related to repurchase of Series A convertible preferred stock

Deemed dividend related to change in conversion rate of Series D convertible

preferred stock

Net loss attributable to Guardant Health, Inc. common stockholders

Net loss per share attributable to Guardant Health, Inc. common stockholders, basic

and diluted

Weighted-average shares used in computing net loss per share attributable to

Guardant Health, Inc. common stockholders, basic and diluted

(1) Fiscal year 2018 and 2017 results do not reflect the impact of the adoption of the new revenue accounting standard in fiscal year 2019.

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

108

 
 
 
 
 
 
   
   
   
 
 
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Guardant Health, Inc.

Consolidated Statements of Comprehensive Loss
(in thousands)

Net loss

Other comprehensive income (loss), net of tax impact:

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

Foreign currency translation adjustments

Other comprehensive income (loss)

Comprehensive loss

Comprehensive loss attributable to redeemable noncontrolling interest

Comprehensive loss attributable to Guardant Health, Inc.

Year Ended December 31,

2019

2018

2017

  $

(67,851)   $

(84,263)   $

(83,221)

1,110  

84  

1,194  

(66,657)   $

(7,800)  

(74,457)   $

449  

—  

449  

(83,814)   $

(800)  

(84,614)   $

(446)

—

(446)

(83,667)

—

(83,667)

  $

  $

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

109

 
 
 
 
 
 
   
   
   
 
 
 
 
Balance as of December 31, 2016

$

Cumulative effect adjustment for ASU 2016-09 adoption

Issuance of Series D convertible preferred stock in exchange for a

technology license agreement

Issuance of Series E convertible preferred stock, net of issuance cost of

$883

Repurchase of Series A convertible preferred stock

Issuance of common stock upon exercise of stock options

Issuance of common stock upon exercise of warrants

Vesting of common stock exercised early

Repurchase of common stock

Stock-based compensation

Other comprehensive loss, net of tax impact

Net loss

Balance as of December 31, 2017

Conversion of convertible preferred stock to common stock upon initial

public offering

Issuance of common stock upon initial public offering, net of offering
costs of $4,475 issuance of Series D convertible preferred stock in
exchange for a technology license agreement

Issuance of common stock upon exercise of stock options

Issuance of common stock upon early exercise of stock options

Issuance of common stock upon exercise of warrants

Repurchase of common stock

Stock-based compensation

—  
—  
—  
—  
—  
—  

Issuance of equity interests in redeemable noncontrolling interest

41,000

Adjustment of redeemable noncontrolling interest

Other comprehensive gain, net of tax impact

Net loss

Balance as of December 31, 2018

Cumulative effect adjustment for Topic 606 adoption

Cumulative effect adjustment for ASU 2018-07 adoption

Issuance of common stock upon follow-on offering, net of offering costs

of $723

Issuance of common stock upon exercise of stock options

Vesting of restricted stock units

Issuance of common stock exercised early

Common stock issued under employee stock purchase plan

Stock-based compensation

Adjustment of redeemable noncontrolling interest

Other comprehensive gain, net of tax impact

Net loss

800
—  
—  

41,800

—  
—  

—    
—  
—  
—  
—  
—  

7,800

—  
—  

Balance as of December 31, 2019

$

49,600

Guardant Health, Inc.
Consolidated Statements of Redeemable Noncontrolling Interest and Stockholders’ Equity
(in thousands, except share data)

Redeemable
Noncontrolling
Interest

Convertible 
Preferred Stock  

Common Stock  

Additional 
Paid-in 
Capital

Accumulated
Other
Comprehensive
Gain (Loss)

Shares
—   40,181,923
—  

—  

Amount
  $ 179,997

Shares
  13,184,214

  $

—  

—  

—  

141,774

1,060

(666,920)

—   38,970,592
—  
—  
—  
—  
—  
—  
—  
—  
—   78,627,369

—  
—  
—  
—  
—  
—  
—  

—  

—  
—  

319,536

(619)

89,030

342,946

—  
—  
—  
—   (1,719,308)
—  
—  
—  

—  

—  
—  

499,974

  11,896,882

Amount

—   $
—  

—  

—  
—  
—  
—  
—  
—  
—  
—  
—  
—  

7,410

  $

174

—  

—  
—  

753

12

103

(7,222)

3,670

  (78,627,369)

(499,974)

  58,264,577

1

499,973

—  
—  

(446)

—  

4,900

(532)

(195,736)

308,606

Total
Stockholders’
Equity

Accumulated
Deficit
  $ (107,625)

  $

79,696

—

1,060

319,536

(174)

—  

—  

(4,716)

(5,335)

—  
—  
—  
—  
—  
—  

753

12

103

(7,222)

3,670

(446)

(83,221)

(83,221)

—  

—  
—  
—  
—  
—  
—  
—  

(800)

—  

—

249,531

2,905

—

45

(172)

6,851

—

(800)

449

(84,263)

(84,263)

(280,799)

483,152

4,907

(1,266)

—  
—  
—  
—  
—  
—  

(7,800)

—  

4,907

—

349,709

11,638

—

95

6,395

16,954

(7,800)

1,194

(67,851)

(86)
—  

—  

—  
—  
—  
—  
—  
—  
—  

—  

—  
—  
—  
—  
—  
—  
—  

—  

449
—  

(83)
—  
—  

—  
—  
—  
—  
—  
—  
—  

1,194

—  

—  
—  
—  
—  
—  
—  
—  

—  
—  
—  

1
—  
—  

—  
—  
—  
—  
—  
—  
—  
—  

249,531

2,905

—  

45

(172)

6,851

—  

—  
—  
—  

764,033

—  

1,266

349,709

11,638

—  

95

6,395

16,954

—  
—  
—  

44,268

963,119

—   14,375,000
—  
—  
—  
—  
—  
—  

320,289

(31,681)

—  

—  

—  
—  
—  
—   85,832,454
—  
—  

—  
—  

5,175,000

22,208

232,333

2,999,419

—  
—  
—  
—  
—  
—  
—  
—  
—   94,261,414

—  

—  
—  
—  
—  

—  
—  
—  
—  
—  
—  
—  

—  
—  
—  
—  
—  
—  

—  
—  
—  
—  
—  
—  
—  
—  
—   $

110

  $

1

  $ 1,150,090

  $

1,111

  $

798,393

(67,851)
  $ (352,809)

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

111

Table of Contents

Guardant Health, Inc.

Consolidated Statements of Cash Flows
(in thousands)

OPERATING ACTIVITIES:

Net loss

Adjustments to reconcile net loss to net cash used in operating activities:

Depreciation and amortization

Amortization of ROU

Unrealized translation (gains) losses on obligation related to royalty

Re-valuation of contingent consideration

Non-cash stock-based compensation

Non-cash interest expense

Loss on debt extinguishment

Amortization of premium (discount) on marketable securities

Benefit from income tax differences

Changes in operating assets and liabilities:

Accounts receivable

Inventory

Prepaid expenses and other current assets

Other assets

Accounts payable

Accrued compensation

Accrued expenses and other current liabilities

Long-term operating lease liabilities net of ROU

Deferred rent

Deferred revenue

Other liabilities

Net cash used in operating activities

INVESTING ACTIVITIES:

Purchase of marketable securities

Maturity of marketable securities

Business acquisition, net of cash acquired

Purchase of property and equipment

Purchase of intangible assets and capitalized license obligations

Payment in connection with a license agreement

Net cash used in investing activities

FINANCING ACTIVITIES:

Payment related to settlement of debt and buyout of royalty obligations

Payments made on capital lease obligations

Proceeds from issuance of convertible preferred stock, net of issuance costs

112

Year Ended December 31,

2019

2018

2017

$

(67,851)   $

(84,263)   $

(83,221)

11,411  

2,198  

(147)  

300  

16,954  

—  

—  

(2,310)  

(1,597)  

(7,389)  

(6,045)  

(6,185)  

(2,852)  

4,341  

5,571  

9,213  

1,039  

—  

(3,861)  

76  

(47,134)  

(614,290)  

325,333  

(7,328)  

(18,717)  

(2,500)  

(68)  

7,136  

—  

(357)  

—  

6,851  

(13)  

—  

(412)  

—  

(22,903)  

(1,849)  

(3,663)  

(451)  

5,046  

8,075  

286  

—  

1,307  

13,025  

—  

(72,185)  

(287,450)  

154,625  

—  

(20,203)  

—  

—  

(317,570)  

(153,028)  

(311)  

(128)  

—  

—  

(443)  

—  

5,206

—

980

—

3,670

685

5,075

359

—

(9,292)

(4,518)

30

(883)

1,250

2,348

4,657

—

204

1,215

—

(72,235)

(236,835)

75,402

—

(6,681)

—

(2,302)

(170,416)

(25,844)

(244)

319,536

 
 
 
 
 
   
 
   
   
 
   
   
 
 
   
   
 
   
   
 
 
   
   
 
   
   
Table of Contents

Proceeds from issuance of common stock under employee stock purchase plan

Proceeds from issuance of common stock upon exercise of stock options

Proceeds from issuance of common stock upon the exercise of warrants

Repurchase of convertible preferred stock

Repurchase of common stock

Proceeds from public offerings of common stock

Payment of offering costs related to public offerings of common stock

Net proceeds from issuance of equity interests in redeemable noncontrolling interest

Net cash provided by financing activities

Net effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash

Net increase in cash, cash equivalents and restricted cash

Cash, cash equivalents and restricted cash - Beginning of period

Cash, cash equivalents and restricted cash - End of period

Supplemental Disclosures of Cash Flow Information:

Operating lease liabilities arising from obtaining right-of-use assets

Cash paid for interest

Cash paid for income taxes

Supplemental Disclosures of Noncash Investing and Financing Activities:

Capitalized license fees financed through future royalty payment

Issuance of Series D convertible preferred stock in exchange for a technology license agreement

Increase in purchases of property and equipment included in accounts payable and accrued

expenses

Vesting of common stock exercised early

Property and equipment acquired under capital leases

Conversion of convertible preferred stock to common stock upon initial public offering

Initial fair value of contingent consideration at acquisition date

Deferred offering costs included in accounts payable and accrued expenses

$

$

$

$

$

$

$

$

$

$

$

$

6,395  

11,639  

—  

—  

—  

350,432  

(723)  

—  

367,304  

84  

2,684  

140,544  

—  

3,111  

45  

—  

(172)  

254,006  

(4,386)  

41,000  

293,161  

—  

67,948  

72,596  

143,228   $

140,544   $

16,714   $

1,181   $

298   $

—   $

—   $

3,296   $

95   $

—   $

—   $

1,065   $

—   $

—   $

1,251   $

102   $

—   $

—   $

897   $

—   $

—   $

499,974   $

—   $

89   $

—

753

12

(5,335)

(7,222)

—

—

—

281,656

—

39,005

33,591

72,596

—

1,339

26

6,302

1,060

591

103

346

—

—

—

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

113

 
   
   
 
   
   
Table of Contents

1. Description of Business

 Guardant Health, Inc.

Notes to Consolidated Financial Statements

Guardant Health, Inc. (the “Company”) is a leading precision oncology company focused on helping conquer cancer globally through use of its proprietary blood
tests,  vast  data  sets  and  advanced  analytics.  The  key  to  conquering  cancer  is  unprecedented  access  to  its  molecular  information  throughout  all  stages  of  the
disease, which it enables by a routine blood draw, or liquid biopsy. The Guardant Health Oncology Platform is designed to leverage the Company’s capabilities in
technology, clinical development, regulatory, reimbursement and commercial adoption to improve patient clinical outcomes, lower healthcare costs and accelerate
biopharmaceutical drug development. In pursuit of its goal to manage cancer across all stages of the disease, the Company has launched its Guardant360 and
GuardantOMNI liquid biopsy-based tests for advanced stage cancer patients, and is developing tests from its LUNAR program which aims to address the needs
of early stage cancer patients with neoadjuvant and adjuvant treatment selection, cancer survivors with surveillance, and asymptomatic individuals eligible for
cancer screening and individuals at a higher risk for developing cancer with early detection.

The  Company  was  incorporated  in  Delaware  in  December  2011  and  is  headquartered  in  Redwood  City,  California.  In  April  2018,  the  Company  established
Guardant Health AMEA, Inc. (the “Joint Venture”) in the United States with an entity affiliated with SoftBank. Under the terms of the joint venture agreement,
the Company held a 50%  ownership  interest  in  the  Joint  Venture.  The  Joint  Venture  has  subsidiaries  in  Singapore  and  Japan  (see  Note  3, Investment in Joint
Venture) and the Company has a subsidiary in Switzerland which was incorporated in 2019.

Reverse Stock Split

In September 2018, the Company’s Board of Directors and its stockholders approved a 0.7378-for-one reverse stock split of the Company’s common stock. The
reverse  stock  split  became  effective  on  September  19,  2018.  The  par  value  of  the  common  stock  was  not  adjusted  as  a  result  of  the  reverse  stock  split.
Adjustments  corresponding  to  the  reverse  stock  split  were  made  to  the  ratio  at  which  the  convertible  preferred  stock  was  convertible  into  common  stock
immediately prior to the closing of the Company’s initial public offering (the “IPO”). All share and per share amounts in the accompanying consolidated financial
statements and notes thereto have been retroactively adjusted for all periods presented to give effect to this reverse stock split.

Approval of Amended and Restated Certificate of Incorporation

In  September  2018,  the  Company’s  Board  of  Directors  and  stockholders  approved  an  amended  and  restated  certificate  of  incorporation,  which  authorized
350,000,000  shares  of  common  stock  and  10,000,000  shares  of  preferred  stock.  The  amended  and  restated  certificate  of  incorporation  became  effective  on
October 9, 2018.

Initial Public Offering

On October 9, 2018, the Company completed the IPO, in which it issued and sold 14,375,000 shares of its common stock at a public offering price of $19.00 per
share.  The  Company  received  net  proceeds  of  $249.5  million  after  deducting  underwriting  discounts  and  commissions  and  offering  expenses  payable  by  the
Company. All then-outstanding warrants to purchase the Company’s common stock were exercised prior to the completion of the IPO. In addition, in connection
with the IPO, all shares of the Company’s then-outstanding convertible preferred stock were automatically converted into 58,264,577 shares of its common stock,
and all then-outstanding warrants to purchase the Company’s convertible preferred stock were automatically converted into warrants to purchase 7,636 shares of
the Company’s common stock.

Follow-on Offering

In May 2019, the Company completed an underwritten public offering, in which it issued and sold 5,175,000 shares of its common stock (including the exercise
in  full  of  the  underwriters’  over-allotment  option  to  purchase  675,000  additional  shares)  at  a  price  of  $71.00  per  share.  The  Company  received  net  proceeds
of $349.7 million after deducting underwriting discounts and commissions and offering expenses payable by the Company.

114

Table of Contents

2. Summary of Significant Accounting Policies

Basis of Presentation

The  Company’s  consolidated  financial  statements  have  been  prepared  in  conformity  with  accounting  principles  generally  accepted  in  the  United  States  of
America (“GAAP”). The accompanying consolidated financial statements include the accounts of Guardant Health, Inc. and its consolidated Joint Venture. Other
stockholders’ interests in the Joint Venture are shown in the consolidated financial statements as redeemable noncontrolling interest. All significant intercompany
balances and transactions have been eliminated in consolidation.

The Company believes that its existing cash and cash equivalents and marketable securities as of December 31, 2019 will be sufficient to allow the Company to
fund its current operating plan through at least a period of one year after the date the accompanying consolidated financial statements are issued. As the Company
continues to incur losses, its transition to profitability is dependent upon a level of revenues adequate to support the Company’s cost structure. If the Company’s
transition to profitability is not consistent with its current operating plan, the Company may have to seek additional capital.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make certain estimates, judgments and assumptions that
affect the reported amounts of assets and liabilities and the related disclosures at the date of the consolidated financial statements, as well as the reported amounts
of  revenues  and  expenses  during  the  periods  presented.  The  Company  bases  its  estimates  on  historical  experience  and  other  market-specific  or  other  relevant
assumptions that it believes to be reasonable under the circumstances. Estimates are used in several areas including, but not limited to, estimation of variable
consideration,  standalone  selling  price  allocation  included  in  contracts  with  multiple  performance  obligations,  the  fair  value  of  assets  acquired  and  liabilities
assumed  for  business  combinations,  goodwill  and  identifiable  intangible  assets,  stock-based  compensation,  contingencies,  certain  inputs  into  the  provision  for
(benefit  from)  income  taxes,  including  related  reserves,  valuation  of  redeemable  noncontrolling  interest,  among  others.  These  estimates  generally  involve
complex issues and require judgments, involve the analysis of historical results and prediction of future trends, can require extended periods of time to resolve
and are subject to change from period to period. Actual results may differ materially from management’s estimates.

JOBS Act Accounting Election

Effective December 31, 2019, we are no longer an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”).
Prior to losing our status as an emerging growth company, the JOBS Act allowed us to delay adoption of new or revised accounting pronouncements applicable to
public companies until such pronouncements were made applicable to private companies, and we had elected to use this extended transition period. We can no
longer take advantage of this extended transition period.

Foreign Currency Translation

The functional currency of the subsidiaries of the consolidated Joint Venture is the local currency. The assets and liabilities of the subsidiaries are translated into
U.S. dollars at exchange rates in effect at each balance sheet date, with the resulting translation adjustments recorded to a separate component of accumulated
other comprehensive loss within stockholders’ equity. Income and expense accounts are translated at average exchange rates during the period. Foreign currency
transaction  gains  and  losses  resulting  from  transactions  denominated  in  a  currency  other  than  the  functional  currency  are  recognized  in  the  consolidated
statements  of  operations.  For  the  year  ended  December  31,  2019  and  2018,  foreign  currency  translation  adjustment  was  immaterial.  For  the  year  ended
December 31, 2017, the Company did not have foreign currency translation adjustment as the foreign subsidiaries were established in 2018.

Segment Information

The Company operates as one operating and reportable segment. The Company’s chief operating decision makers, the Chief Executive Officer, and the President
and Chief Operating Officer, manage the Company’s operations on an aggregate basis for purposes of allocating resources.

115

Table of Contents

Cash and Cash Equivalents and Restricted Cash

Cash  equivalents  consist  of  highly  liquid  investments  with  original  maturities  at  the  time  of  purchase  of  three  months  or  less.  Cash  equivalents  include  bank
demand  deposits  and  money  market  accounts  that  invest  primarily  in  U.S.  government-backed  securities  and  treasuries.  Cash  equivalents  are  carried  at  cost,
which approximates their fair value.

In  fiscal  2017,  restricted  cash  consists  of  deposits  related  to  the  Company’s  corporate  credit  card.  The  Company  did  not  have  any  restricted  cash  as  of
December 31, 2019 and 2018.

Marketable Securities

Marketable securities consist primarily of high-grade corporate bonds, commercial papers and certificates of deposit with third parties. Marketable securities with
original maturities at the time of purchase between three and twelve months from balance sheet dates are classified as short-term marketable securities and those
with maturities over twelve months from balance sheet dates are classified as long-term marketable securities. The Company classifies all marketable securities as
available-for-sale, which are recorded at fair value. Unrealized gains and losses are included in accumulated other comprehensive loss in stockholders’ equity.
Any  premium  or  discount  arising  at  purchase  is  amortized  or  accreted  to  interest  income  or  expense.  Realized  gains  and  losses  and  declines  in  value,  if  any,
judged to be other than temporary on available‑for‑sale securities are reported in other income (expense), net. When securities are sold, any associated unrealized
gain or loss initially recorded as a separate component of stockholders’ equity is reclassified out of stockholders’ equity on a specific‑identification basis and
recorded in earnings for the period.

The Company periodically evaluates whether declines in fair values of its marketable securities below their book value are other-than-temporary. This evaluation
consists of several qualitative and quantitative factors regarding the severity and duration of the unrealized loss as well as the Company’s ability and intent to hold
the marketable security until a forecasted recovery occurs. Additionally, the Company assesses whether it has plans to sell the security or it is more likely than not
that  it  will  be  required  to  sell  any  marketable  securities  before  recovery  of  its  amortized  cost  basis.  Factors  considered  include  quoted  market  prices,  recent
financial results and operating trends, implied values from any recent transactions or offers of investee securities, credit quality of debt instrument issuers, other
publicly available information that may affect the value of the marketable security, duration and severity of the decline in value, and management’s strategy and
intentions for holding the marketable security. To date, the Company has not recorded any impairment charges on its marketable securities related to other-than-
temporary declines in market value.

Concentration of Risk

The Company is subject to credit risk from its portfolio of cash equivalents held at one commercial bank and investments in marketable securities. The Company
limits its exposure to credit losses by investing in money market funds through a U.S. bank with high credit ratings. The Company’s cash may consist of deposits
held with banks that may at times exceed federally insured limits, however, its exposure to credit risk in the event of default by the financial institution is limited
to  the  extent  of  amounts  recorded  on  the  consolidated  balance  sheets.  The  Company  performs  evaluations  of  the  relative  credit  standing  of  these  financial
institutions to limit the amount of credit exposure.

The Company also invests in investment‑grade debt instruments and has policy limits for the amount it can invest in any one type of security, except for securities
issued  or  guaranteed  by  the  U.S.  government.  The  goals  of  the  Company’s  investment  policy,  in  order  of  priority,  are  as  follows:  safety  and  preservation  of
principal  and  diversification  of  risk;  liquidity  of  investments  sufficient  to  meet  cash  flow  requirements;  and  a  competitive  after‑tax  rate  of  return.  Under  its
investment policy, the Company limits amounts invested in such securities by credit rating, maturity, investment type and issuer, as a result, the Company is not
exposed to any significant concentrations of credit risk from these financial instruments.

The Company is also subject to credit risk from its accounts receivable. The majority of the Company’s accounts receivable arises from the provision of precision
oncology  services  in  the  United  States  and  are  primarily  with  biopharmaceutical  companies  with  high  credit  ratings.  The  Company  has  not  experienced  any
material  losses  related  to  receivables  from  individual  customers,  or  groups  of  customers.  The  Company  does  not  require  collateral.  Accounts  receivable  are
recorded at the invoiced amount and do not bear interest.

A  significant  customer  is  a  biopharmaceutical  customer  or  a  clinical  testing  payer  that  represents  10%  or  more  of  the  Company’s  total  revenue  or  accounts
receivable  balance.  Revenue  attributable  to  each  significant  customer,  including  its  affiliated  entities,  as  a  percentage  of  the  Company’s  total  revenue,  for  the
respective period, and accounts receivable balance attributable to each significant customers, including its affiliated entities, as a percentage of the Company’s
total accounts receivable balance, at the respective consolidated balance sheet date, are as follows:

116

Table of Contents

Customer A

Customer B

Customer C

Customer D
*

less than 10%

Accounts Receivable

Revenue

Year Ended December 31,

Accounts Receivable

As of December 31,

2019

2018

2017

2019

2018

*

26%  

*

14%  

*

18%  

*

*

13%  

13%  

*

*

*

40%  

10%  

*

*

65%

*

*

Accounts receivable represent valid claims against biopharmaceutical companies, research institutes and international distributors. The Company evaluates the
collectability of its accounts receivable and provides for an allowance for potential credit losses based on management’s best estimate of the amount of probable
credit losses. As of December 31, 2019 and December 31, 2018, the Company had no allowance for doubtful accounts.

Inventory

Inventories are stated at the lower of cost or net realizable value on a first-in, first-out basis. Inventory consisted entirely of supplies, which are consumed when
providing liquid biopsy tests, and therefore the Company does not maintain any finished goods inventory.

In order to assess the ultimate realization of inventories, the Company is required to make judgments as to future demand requirements compared to current or
committed inventory levels. The Company periodically reviews its inventories for excess or obsolescence and writes-down obsolete or otherwise unmarketable
inventory to its estimated net realizable value. If the actual net realizable value is less than that estimated by the Company, or if it is determined that inventory
utilization will further diminish based on estimates of demand, additional inventory write-downs may be required. Amounts written-down due to unmarketable
inventory are recorded in cost of precision oncology testing.

Property and Equipment, Net

Property and equipment are recorded at cost. Depreciation is computed over estimated useful lives of the related assets using the straight-line method. Leasehold
improvements are amortized using the straight-line method over the estimated useful lives of the assets or the remaining term of the lease, whichever is shorter.
The  Company  periodically  reviews  the  depreciable  lives  assigned  to  property  and  equipment  placed  in  service  and  changes  the  estimates  of  useful  lives,  if
necessary. Maintenance and repairs are expensed as incurred.

Estimated useful lives for property and equipment are as follows:

Property and Equipment

Machinery and equipment

Furniture and fixtures

Computer hardware and computer software

Leasehold improvements

Business Combinations

Estimated Useful Life

3 – 5 years

7 years

3 years

Lesser of estimated useful life or remaining lease term

The  Company  includes  the  results  of  operations  of  the  businesses  that  are  acquired  as  of  the  acquisition  date.  The  Company  allocates  the  purchase  price  of
acquisitions  to  the  assets  acquired  and  liabilities  assumed  based  on  the  estimated  fair  values.  The  excess  of  the  purchase  price  over  the  fair  values  of  the
identifiable assets and liabilities is recorded as goodwill. Acquisition related costs are recognized separately from the business combination and are expensed as
incurred.

117

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Goodwill and Intangible Assets, net

Intangible assets related to in-process research and development costs (“IPR&D”) are considered to be indefinite-lived until the completion or abandonment of
the associated research and development efforts. If and when development is complete, the associated assets would be deemed finite-lived and would then be
amortized  based  on  their  respective  estimated  useful  lives  at  that  point  in  time.  Prior  to  completion  of  the  research  and  development  efforts,  the  assets  are
considered indefinite-lived. During this period, the assets will not be amortized but will be tested for impairment on an annual basis and between annual tests if
we  become  aware  of  any  events  occurring  or  changes  in  circumstances  that  would  indicate  a  reduction  in  the  fair  value  of  the  IPR&D  projects  below  their
respective carrying amounts.

Goodwill represents the excess of the purchase price over the fair value of net identifiable assets and liabilities. Goodwill and IPR&D are not amortized but are
tested  for  impairment  at  least  annually  during  the  fourth  fiscal  quarter,  or  if  circumstances  indicate  their  value  may  no  longer  be  recoverable.  The  Company
continues to operate in one segment, which is considered to be the sole reporting unit and, therefore, goodwill was tested for impairment at the enterprise level.
As of December 31, 2019, there has been no impairment of goodwill.

Intangible  assets  are  carried  at  cost,  net  of  accumulated  amortization.  The  Company  does  not  have  intangible  assets  with  indefinite  useful  lives  other  than
goodwill and the acquired IPR&D. Amortization is recorded on a straight-line basis over the intangible asset's useful life, which is approximately 6-10 years.

Obligation Related to Royalty

Certain of the Company’s asset acquisitions involve the potential for future payment of consideration that is contingent upon the royalty payments due on future
product net sales, subject to annual minimums. The fair value of such liabilities is determined at the acquisition date using unobservable inputs. These inputs
include the estimated amount and timing of projected cash flows and the risk-adjusted discount rate used to present value the cash flows.

Impairment for Long-Lived Assets

The Company evaluates long-lived assets, including property and equipment, for impairment whenever events or changes in business circumstances indicate that
the carrying amount of the asset may not be fully recoverable. An impairment loss would be recognized when estimated undiscounted future cash flows expected
to  result  from  the  use  of  the  asset  and  its  eventual  disposition  are  less  than  its  carrying  amount.  Impairment,  if  any,  is  measured  as  the  amount  by  which  the
carrying amount of a long-lived asset exceeds its fair value.

Leases

The  Company  determines  if  an  arrangement  contains  a  lease  at  inception.  Operating  lease  right-of-use  (“ROU”)  assets  and  operating  leases  liabilities  are
recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. ROU assets also include any initial
direct costs incurred and any lease payments made at or before the lease commencement date, less lease incentives received. The Company uses its incremental
borrowing rate based on the information available at the commencement date in determining the lease liabilities, as the Company's leases generally do not provide
an implicit rate. Lease terms may include options to extend or terminate when the Company is reasonably certain the option will be exercised. Lease expense is
recognized on a straight-line basis over the lease term. The Company also has lease arrangements with lease and non-lease components. The Company elected the
practical expedient not to separate non-lease components from lease components for the Company’s facility leases. The Company also elected to apply the short-
term lease measurement and recognition exemption in which ROU assets and lease liabilities are not recognized for leases with terms of 12 months or less.

Revenue Recognition under ASC 606

The Company derives revenue from the provision of precision oncology testing services provided to its ordering physicians and biopharmaceutical customers, as
well as from biopharmaceutical research and development services provided to its biopharmaceutical customers. Precision oncology services include genomic
profiling and the delivery of other genomic information derived from the Company’s platform. Development services include companion diagnostic development,
information solutions and laboratory services. The Company currently receives payments from third-party commercial and governmental payers, certain hospitals
and oncology centers and individual patients, as well as biopharmaceutical companies and research institutes.

118

Table of Contents

Effective  January  1,  2019,  we  adopted  the  new  revenue  recognition  standard  FASB  ASC  Topic  606,  Revenue  from  Contracts  with  Customers,  or  ASC  606.
Revenues are recognized when control of services is transferred to customers, in an amount that reflects the consideration the Company expects to be entitled to
in  exchange  for  those  services.  ASC  606  provides  for  a  five-step  model  that  includes  identifying  the  contract  with  a  customer,  identifying  the  performance
obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations, and recognizing revenue when, or as,
an entity satisfies a performance obligation.

Precision oncology testing

The Company recognizes revenue from the sale of its precision oncology tests for clinical customers, including certain hospitals, cancer centers, other institutions
and patients, at the time results of the test are reported to physicians. Most precision oncology tests requested by clinical customers are sold without a written
agreement; however, the Company determines an implied contract exists with its clinical customers. The Company identifies each sale of its liquid biopsy test to
clinical customer as a single performance obligation. With the exception of certain limited contracted arrangements with insurance carriers and other institutions
where the transaction price is fixed, a stated contract price does not exist and the transaction price for each implied contract with clinical customers represents
variable  consideration.  The  Company  estimates  the  variable  consideration  under  the  portfolio  approach  and  considers  the  historical  reimbursement  data  from
third-party  commercial  and  governmental  payers  and  patients,  as  well  as  known  or  anticipated  reimbursement  trends  not  reflected  in  the  historical  data.  The
Company monitors the estimated amount to be collected in the portfolio at each reporting period based on actual cash collections in order to assess whether a
revision to the estimate is required. Both the estimate and any subsequent revision contain uncertainty and require the use of judgment in the estimation of the
variable  consideration  and  application  of  the  constraint  for  such  variable  consideration.  Revenue  from  sales  of  precision  oncology  tests  to  biopharmaceutical
customers  are  based  on  a  negotiated  price  per  test  or  on  the  basis  of  an  agreement  to  provide  certain  testing  volume  over  a  defined  period.  The  Company
identifies its promise to transfer a series of distinct liquid biopsy tests to biopharmaceutical customers as a single performance obligation. Precision oncology tests
to  biopharmaceutical  customers  are  generally  billed  at  a  fixed  price  for  each  test  performed.  For  agreements  involving  testing  volume  to  be  satisfied  over  a
defined  period,  revenue  is  recognized  over  time  based  on  the  number  of  tests  performed  as  the  performance  obligation  is  satisfied  over  time.  Results  of  the
Company’s  precision  oncology  services  are  delivered  electronically,  and  as  such  there  are  no  shipping  or  handling  fees  incurred  by  the  Company  or  billed  to
customers.

Development services

The Company performs development services for its biopharmaceutical customers utilizing its precision oncology information platform. Development services
typically  represent  a  single  performance  obligation  as  the  Company  performs  a  significant  integration  service,  such  as  analytical  validation  and  regulatory
submissions. The individual promises are not separately identifiable from other promises in the contracts and, therefore, are not distinct. However, under certain
contracts,  a  biopharmaceutical  customer  may  engage  the  Company  for  multiple  distinct  development  services  which  are  both  capable  of  being  distinct  and
separately  identifiable  from  other  promises  in  the  contracts  and,  therefore,  distinct  performance  obligations.  The  Company  collaborates  with  pharmaceutical
companies in the development of new drugs. As part of these collaborations, the Company provides services related to regulatory filings with the FDA to support
companion diagnostic device submissions for the Company’s liquid biopsy panels. Under these collaborations, the Company generates revenue from achievement
of milestones, as well as provision of on-going support. For development services performed, the Company is compensated through a combination of an upfront
fee  and  performance-based,  non-refundable  regulatory  and  other  developmental  milestone  payments.  The  transaction  price  of  the  Company's  development
services  contracts  typically  represents  variable  consideration.  Application  of  the  constraint  for  variable  consideration  to  milestone  payments  is  an  area  that
requires significant judgment. The Company evaluates factors such as the scientific, clinical, regulatory, commercial, and other risks that must be managed to
achieve the respective milestone and the level of effort and investment required to achieve the respective milestone. In making this assessment, the Company
considers its historical experience with similar milestones, the degree of complexity and uncertainty associated with each milestone, and whether achievement of
the milestone is dependent on parties other than the Company. The constraint for variable consideration is applied such that it is probable a significant reversal of
revenue will not occur when the uncertainty associated with the contingency is resolved. Application of the constraint for variable consideration is updated at
each  reporting  period  as  a  revision  to  the  estimated  transaction  price.  The  Company  recognizes  development  services  revenue  over  the  period  in  which
biopharmaceutical research and development services are provided. Specifically, the Company recognizes revenue using an input method to measure progress,
utilizing costs incurred to-date relative to total expected costs as its measure of progress. For development of new products or services under these arrangements,
costs  incurred  before  technological  feasibility  is  reached  are  included  as  research  and  development  expenses  in  the  Company’s  consolidated  statements  of
operations, while costs incurred thereafter are recorded as cost of development services.

119

Table of Contents

Contracts with multiple performance obligations

Contracts  with  biopharmaceutical  customers  may  include  multiple  distinct  performance  obligations,  such  as  provision  of  precision  oncology  testing,
biopharmaceutical research and development services, and clinical trial enrollment assistance, among others. The Company evaluates the terms and conditions
included  within  its  contracts  with  biopharmaceutical  customers  to  ensure  appropriate  revenue  recognition,  including  whether  services  are  considered  distinct
performance  obligations  that  should  be  accounted  for  separately  versus  together.  The  Company  first  identifies  material  promises,  in  contrast  to  immaterial
promises or administrative tasks, under the contract, and then evaluates whether these promises are both capable of being distinct and distinct within the context
of the contract. In assessing whether a promised service is capable of being distinct, the Company considers whether the customer could benefit from the service
either  on  its  own  or  together  with  other  resources  that  are  readily  available  to  the  customer,  including  factors  such  as  the  research,  development,  and
commercialization capabilities of a third party as well as the availability of the associated expertise in the general marketplace. In assessing whether a promised
service is distinct within the context of the contract, the Company considers whether it provides a significant integration of the services, whether the services
significantly  modify  or  customize  one  another,  or  whether  the  services  are  highly  interdependent  or  interrelated.  For  contracts  with  multiple  performance
obligations,  the  transaction  price  is  allocated  to  the  separate  performance  obligations  on  a  relative  standalone  selling  price  basis.  The  Company  determines
standalone selling price by considering the historical selling price of these performance obligations in similar transactions as well as other factors, including, but
not limited to, the price that customers in the market would be willing to pay, competitive pricing of other vendors, industry publications and current pricing
practices, and expected costs of satisfying each performance obligation plus appropriate margin.

Contract assets

Contract assets consists primarily of: i) precision oncology testing revenues to clinical customers that are recognized upon delivery of the test results prior to cash
collection; and ii) development services revenues to biopharmaceutical customers that are recognized upon the achievement of performance-based milestones but
prior to the establishment of billing rights. Contract assets are relieved when the Company receives payments from clinical customers, or when it invoices the
biopharmaceutical customers when milestones are achieved, thereby reclassifying the balances from contract assets to accounts receivable. Contract assets are
presented under accounts receivable and other assets on the Company’s consolidated balance sheets. As of December 31, 2019, the Company had contract assets
of $6.2 million of which $1.0 million is recorded in other assets in the consolidated balance sheet. The Company had $4.9 million of contract assets as of January
1, 2019.

Deferred revenue

Deferred revenue, which is a contract liability, consists primarily of payments received in advance of revenue recognition from contracts with customers. For
example, development services contracts with biopharmaceutical customers often contain upfront payments which results in the recording of deferred revenue to
the extent cash is received prior to the Company’s performance of the related services. Contract liabilities are relieved as the Company performs its obligations
under  the  contract  and  revenue  is  consequently  recognized.  As  of  December  31,  2019  and  2018,  the  deferred  revenue  balance  was  $12.3  million  and  $16.1
million, respectively, which included $4.8 million and $10.5 million, respectively, related to collaboration development efforts with pharmaceutical companies to
be recognized as the Company performs research and development services in the future periods. Revenue recognized in the twelve months ended December 31,
2019  that  was  included  in  the  deferred  revenue  balance  as  of  January  1,  2019  was  $15.2  million,  which  primarily  represented  revenue  from  provision  of
development services under the collaboration agreement with our biopharmaceutical companies. 

Transaction price allocated to the remaining performance obligations

Transaction price allocated to remaining performance obligations represents contracted revenue that has not yet been recognized, which includes deferred revenue
and  non-cancelable  amounts  that  will  be  invoiced  and  recognized  as  revenues  in  future  periods.  The  Company  expects  to  recognize  substantially  all  of  the
remaining transaction price in the next 12 months.

120

Table of Contents

Revenue Recognition under ASC 605

The Company derives revenue from the provision of precision oncology testing services provided to its ordering physicians and biopharmaceutical customers, as
well as from biopharmaceutical research and development services provided to its biopharmaceutical customers. Precision oncology services include genomic
profiling and the delivery of other genomic information derived from the Company’s platform. Development services include the development of new platforms
and information solutions, including companion diagnostic development and laboratory services. The Company currently receives payments from commercial
third-party payers, certain hospitals and oncology centers and individual patients, as well as biopharmaceutical companies and research institutes.

The Company recognizes revenue when all of the following criteria are met: (i) persuasive evidence of an arrangement exists; (ii) delivery has occurred; (iii) the
fee is fixed or determinable; and (iv) collectability is reasonably assured. Criterion (i) is satisfied when the Company has an arrangement or contract in place.
Criterion (ii) is satisfied when the Company delivers a test report corresponding to each sample, without further commercial obligations. Determination of criteria
(iii) and (iv) are based on management’s judgments regarding whether the fee is fixed or determinable, and whether the collectability of the fee is reasonably
assured. The Company recognizes revenue from the sale of its precision oncology tests for clinical customers, including certain hospitals, cancer centers, other
institutions and patients, at the time results of the test are reported to physicians, if criteria (i) through (iv) above are met. The Company recognizes revenue on a
cash basis when it cannot conclude that criteria (iii) and (iv) have been met. Most of precision oncology tests requested by clinical customers are sold without a
contracted engagement with a third-party payer; therefore, the Company experiences significant variability in collections and does not have sufficient history to
establish a predictable pattern of payment. Because the price is not fixed or determinable and collectability is not reasonably assured, the Company recognizes
revenue on a cash basis for sales of its liquid biopsy tests to clinical customers where collection depends on a third-party payer or the individual patient. The
Company uses judgment in its assessment of whether the fee is fixed or determinable and whether collectability is reasonably assured in determining when to
recognize revenue. Accordingly, the Company expects to recognize revenue on a cash basis for these clinical customers until it has sufficient history to reliably
estimate payment patterns. The Company’s precision oncology information services are delivered electronically, and as such there are no shipping or handling
fees incurred by the Company or billed to customers.

Revenue from sales of the Company’s tests to biopharmaceutical customers are based on a negotiated price per test or on the basis of an agreement to provide
certain  testing  volume,  data  access  or  biopharmaceutical  research  and  development  services  over  a  defined  period.  The  Company  recognizes  revenue  upon
delivery of the test results, or over the period in which biopharmaceutical research and development services are provided, as appropriate.

Multiple-element arrangements.

The  Company  performs  development  services  for  its  biopharmaceutical  customers  utilizing  its  precision  oncology  information  platform.  Contracts  with
biopharmaceutical  customers  are  primarily  analyzed  as  multiple-element  arrangements  given  the  nature  of  the  service  deliverables.  For  development  services
performed, the Company is compensated in various ways, including (i) through non-refundable regulatory and other developmental milestone payments; and (ii)
through  royalty  and  sales  milestone  payments.  The  Company  performs  development  services  as  part  of  its  normal  activities.  The  Company  records  these
payments as development services revenue in the consolidated statements of operations using a proportional performance model over the period which the unit of
accounting is delivered or based on the level of effort expended to date over the total expected effort, whichever is considered the most appropriate measure of
performance. For development of new products or services under these arrangements, costs incurred before technological feasibility is assured are included as
research and development expenses in the Company’s consolidated statements of operations, while costs incurred thereafter are recorded as cost of development
services.  The  Company  collaborates  with  pharmaceutical  companies  in  the  development  and  clinical  trials  of  new  drugs.  As  part  of  these  collaborations,  the
Company  provides  services  related  to  regulatory  filings  with  the  FDA  to  support  companion  diagnostic  device  submissions  for  the  Company’s  liquid  biopsy
panels. Under these collaborations the Company generates revenue from achievement of milestones, as well as provision of on-going support. These collaboration
arrangements include no royalty obligations.

For revenue arrangements with multiple deliverables, the Company evaluates each deliverable to determine whether it qualifies as a separate unit of accounting.
This determination is based on whether the deliverable has stand-alone value to the customer and whether a general right of return exists. In assessing whether an
item  has  standalone  value,  the  Company  considers  factors  such  as  the  research,  development  and  commercialization  capabilities  of  a  third  party  and  the
availability of the associated expertise in the general marketplace. In addition, the Company considers whether the other party in the arrangement can use the
other deliverables for their intended purpose without the receipt of the remaining elements, whether the value of the deliverable is dependent on the undelivered
items and whether there are other vendors that can provide the

121

Table of Contents

undelivered elements. The consideration that is fixed or determinable is then allocated to each separate unit of accounting based on the relative selling price of
each  deliverable.  The  Company  allocates  the  arrangement  consideration  following  a  hierarchy  to  determine  the  relative  selling  price  to  be  used  for  allocating
revenue to deliverables: (i) vendor-specific objective evidence of fair value (“VSOE”), (ii) third-party evidence of selling price (“TPE”), and (iii) best estimate of
the selling price (“BESP”) if neither VSOE nor TPE is available. The Company typically uses BESP to estimate the selling price, since it generally does not have
VSOE or TPE of selling price for its units of accounting under multiple-element arrangements. In developing the BESP for a unit of accounting, the Company
considers applicable market conditions and estimated costs. The Company validates the BESP for units of accounting by evaluating whether changes in the key
assumptions used to determine the BESP will have a significant effect on the allocation of arrangement consideration between multiple units of accounting. The
consideration allocated to each unit of accounting is recognized as the related goods or services are delivered, limited to the consideration that is not contingent
upon future deliverables. The Company uses judgment in identifying the deliverables in its arrangements, assessing whether each deliverable is a separate unit of
accounting and in determining the best estimate of selling price for certain deliverables. The Company also uses judgment in determining the period over which
the deliverables are recognized in certain of its arrangements. Any amounts received that do not meet the criteria for revenue recognition are recorded as deferred
revenue  until  such  criteria  are  met.  The  Company  performed  laboratory  installation  and  maintenance  services  for  one  of  its  customers  as  part  of  a  multiple-
element arrangement entered into in 2017. The Company recognized certain revenue from its construction service deliverables in a multiple-element collaboration
arrangement based on the completed-contract method. This method was used as the Company determined that it did not have the basis for estimating performance
under the contract. Other construction service deliverables under that contract were recognized under the percentage-of-completion method due to the Company’s
ability  to  make  reasonably  dependable  estimates  of  the  extent  of  progress  toward  contract  completion.  All  construction  services  under  this  arrangement  were
completed in March 2018.

Milestones

The  Company  recognizes  payments  that  are  contingent  upon  achievement  of  a  substantive  milestone  in  their  entirety  in  the  period  in  which  the  milestone  is
achieved. Milestones are defined as events that can only be achieved based on the Company’s performance and there is substantive uncertainty about whether the
event will be achieved at the inception of the arrangement. Events that are contingent only on the passage of time or only on counterparty performance are not
considered  substantive  milestones.  Further,  the  amounts  received  must  relate  solely  to  prior  performance,  be  reasonable  relative  to  all  of  the  deliverables  and
payment terms within the agreement and commensurate with the Company’s performance to achieve the milestone after commencement of the agreement. Any
contingent  payment  that  becomes  payable  upon  achievement  of  events  that  are  not  considered  substantive  milestones  are  allocated  to  the  units  of  accounting
previously identified at the inception of an arrangement when the contingent payment is received and revenue is recognized based on the revenue recognition
criteria  for  each  unit  of  accounting.  Revenue  from  commercial  milestone  payments  are  recorded  as  revenue  upon  achievement  of  the  milestone,  assuming  all
other revenue recognition criteria are met.

Costs of Precision Oncology Testing

Cost of precision oncology testing generally consists of cost of materials, direct labor including bonus, benefit and stock-based compensation, equipment and
infrastructure  expenses  associated  with  processing  liquid  biopsy  test  samples  (including  sample  accessioning,  library  preparation,  sequencing,  quality  control
analyses  and  shipping  charges  to  transport  blood  samples),  freight,  curation  of  test  results  for  physicians  and  license  fees  due  to  third  parties.  Infrastructure
expenses include depreciation of laboratory equipment, rent costs, amortization of leasehold improvements and information technology costs. Costs associated
with performing the Company’s tests are recorded as the tests are performed regardless of whether revenue was recognized with respect to that test. Royalties for
licensed technology calculated as a percentage of revenues generated using the associated technology are recorded as expense at the time the related revenues are
recognized. One-time royalty payments related to signing of license agreements or other milestones, such as issuance of new patents, are amortized to expense
over the expected useful life of the applicable patent rights.

Cost of Development Services

Cost of development service includes costs incurred for the performance of development services requested by the Company’s customers. For development of
new products, costs incurred before technological feasibility has been achieved are reported as research and development expenses, while costs incurred thereafter
are reported as cost of development services.

Research and Development Expenses

Research  and  development  expenses  are  comprised  of  costs  incurred  to  develop  technology  and  include  salaries  and  benefits,  reagents  and  supplies  used  in
research and development laboratory work, infrastructure expenses, including allocated facility occupancy and information technology costs, contract services
and other outside costs. Research and development expenses

122

Table of Contents

also include costs related to activities performed under contracts with biopharmaceutical companies. Research and development costs are expensed as incurred.
Payments made prior to the receipt of goods or services to be used in research and development are deferred and recognized as expense in the period in which the
related goods are received or services are rendered. Costs to develop the Company’s technology capabilities are recorded as research and development unless they
meet the criteria to be capitalized as internal-use software costs.

Advertising

The Company expenses advertising costs as incurred. The Company incurred advertising costs of $1.3 million, $0.2 million and $0.3 million for the years ended
December 31, 2019, 2018 and 2017, respectively.

Deferred Offering Costs

Deferred offering costs consist of fees and expenses incurred in connection with the anticipated sale of the Company’s common stock in the IPO, including the
legal, accounting, printing and other IPO-related costs. In October 2018, upon completion of the IPO, the Company reclassified deferred offering costs of $4.5
million into additional paid-in capital as a reduction of the net proceeds received from the IPO. There were no deferred offering costs as of December 31, 2019.

Stock‑Based Compensation

Stock‑based compensation related to stock options granted to the Company’s employees, directors and nonemployees is measured at the grant date based on the
fair value of the award. The fair value is recognized as expense over the requisite service period, which is generally the vesting period of the respective awards.
Compensation expense for stock options with performance metrics is calculated based upon expected achievement of the metrics specified in the grant.

In 2018, the Company accounted for stock options issued to nonemployees consultants based on the estimated fair value at the grant date and re-measured at each
reporting  period.  Starting  January  1,  2019,  upon  adoption  of  Accounting  Standards  Update  (“ASU”)  2018-07,  Compensation  -  Stock  Compensation  (Topic
718), Improvements to Nonemployee Share-Based Payment Accounting, the fair value of stock options issued to nonemployee consultants is determined as of the
grant date, and compensation expense is being recognized over the period that the related services are rendered.

The Company uses the Black‑Scholes option‑pricing model to estimate the fair value of its stock options and purchase rights under its 2018 Employee Stock
Purchase Plan. The Black-Scholes option-pricing model requires assumptions to be made related to expected term of an award, expected volatility, risk-free rate
and expected dividend yield. Starting January 1, 2017, forfeitures are accounted for as they occur.

The Company accounts for restricted stock units issued to employees based on the grant date fair value which is determined based on the closing market price of
the  common  stock  on  the  date  of  grant.  The  expense  is  recognized  in  the  Company’s  consolidated  statement  of  operations  on  a  straight-line  basis  over  the
requisite vesting period.

Income Taxes

Income taxes are recorded using an asset and liability approach. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to
differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases using enacted tax rates in effect for
the year in which the differences are expected to affect taxable income. Tax benefits are recognized when it is more likely than not that a tax position will be
sustained during an audit. Deferred tax assets are reduced by a valuation allowance if current evidence indicates that it is considered more likely than not that
these benefits will not be realized.

The Company’s tax positions are subject to income tax audits. The Company recognizes the tax benefit of an uncertain tax position only if it is more likely than
not that the position is sustainable upon examination by the taxing authority, based on the technical merits. The tax benefit recognized is measured as the largest
amount of benefit which is more likely than not to be realized upon settlement with the taxing authority. The Company recognizes interest accrued and penalties
related to unrecognized tax benefits in its tax provision. The Company evaluates uncertain tax positions on a regular basis. The evaluations are based on a number
of  factors,  including  changes  in  facts  and  circumstances,  changes  in  tax  law,  correspondence  with  tax  authorities  during  the  course  of  the  audit,  and  effective
settlement of audit issues. The provision for income taxes includes the effects of any accruals that the Company believes are appropriate, as well as the related net
interest and penalties.

123

Table of Contents

Net Loss Per Share Attributable to Common Stockholders

The  Company  calculates  basic  net  loss  per  share  attributable  to  common  stockholders  by  dividing  the  net  loss  attributable  to  common  stockholders  by  the
weighted-average number of shares of common stock outstanding for the period. The diluted net loss per share attributable to common stockholders is computed
by giving effect to all potential dilutive common stock equivalents outstanding for the period determined using the treasury stock method. For purposes of this
calculation, convertible preferred stock, common stock warrants, stock options, restricted stock units, shares issuable pursuant to the employee stock purchase
plan, shares subject to repurchase from early exercised options and contingently issuable shares are considered common stock equivalents but have been excluded
from the calculation of diluted net loss per share attributable to common stockholders as their effect is anti-dilutive.

Prior to the closing of the Company’s IPO in October 2018 and the conversion of its convertible preferred stock into common stock, the Company calculated its
basic and diluted net loss per share attributable to common stockholders of the Company in conformity with the two-class method required for companies with
participating securities. The Company considered its convertible preferred stock to be participating securities. In the event a dividend had been declared or paid
on the Company’s common stock, holders of convertible preferred stock were entitled to a share of such dividend in proportion to the holders of common stock
on an as-if converted basis. Under the two-class method, net loss attributable to common stockholders is determined by allocating undistributed earnings between
common and preferred stockholders. The net loss attributable to common stockholders was not allocated to the convertible preferred stock under the two-class
method as the convertible preferred stock did not have a contractual obligation to share in the Company’s losses.

Accounting Pronouncements Adopted

Revenues

The Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and all related amendments (collectively, “ASC 606”) on January 1,
2019 utilizing the modified retrospective method. The cumulative effect of applying the standard to all contracts that were not completed as of the date of initial
application  was  recognized  to  beginning  accumulated  deficit  as  of  January  1,  2019.  The  Company  identified  certain  differences  in  accounting  for  revenue
recognition as a result of the adoption of ASC 606 which have impacted its financial position and results of operations. For precision oncology testing revenue
with  certain  clinical  customers,  the  Company  historically  deferred  revenue  recognition  until  cash  receipt  when  the  price  pursuant  to  the  underlying  customer
arrangement became fixed and determinable and collectability became reasonably assured. Under the new standard, this is considered variable consideration and
revenue is recognized at the estimated transaction price upon delivery. This results in earlier revenue recognition under the new standard as compared to previous
revenue recognition. For development services revenue with certain biopharmaceutical customers, the Company historically limited revenue recognition based on
the  right  to  invoice  the  customer.  Under  the  new  standard,  for  these  arrangements,  the  Company  constrains  revenue  such  that  it  is  probable  that  a  significant
reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved.
For arrangements with regulatory and other developmental milestone payments, this results in a change to the timing and pattern of revenue recognition under the
new standard as compared to previous revenue recognition. Comparative information from prior periods has not been restated and continues to be reported under
the accounting standards in effect for those periods. The cumulative effect of changes made to the consolidated balance sheet as of January 1, 2019 related to the
adoption of ASC 606 were as follows:

Assets:

Accounts receivable

Equity:

Accumulated deficit

As of December 31,
2018

Adjustments due to
ASC 606

As of January 1,
2019

(in thousands)

$

$

35,690 $

4,907 $

40,597

(280,799) $

4,907 $

(275,892)

In  accordance  with  ASC  606  requirements  under  the  modified  retrospective  method  of  adoption,  the  impact  of  the  adoption  of  ASC  606  on  the  Company’s
consolidated statement of operations and consolidated balance sheet was as follows:

124

 
 
 
 
 
 
 
 
Table of Contents

Revenue:

Precision oncology testing

Development services

Assets:

Accounts receivable

Equity:

Accumulated deficit

For the year ended December 31, 2019

As Reported Under
ASC 606

Effect of
Change

Balances Without
Adoption of ASC 606

(in thousands)

$

$

180,462 $

33,913 $

(347) $

— $

180,115

33,913

As of December 31, 2019

As Reported
Under ASC
606

Effect of
Change

Balances Without Adoption of
ASC 606

(in thousands)

$

$

47,986 $

(347) $

(352,809) $

(347) $

47,639

(353,156)

ASC 606 did not have an aggregate impact on the Company’s net cash used in operating activities but resulted in offsetting changes in certain assets presented
within net cash used in operating activities in the Company’s consolidated statement of cash flows, as reflected in the above table. The the Company’s revenue is
generated  primarily  from  the  sale  of  precision  oncology  testing  and  development  services.  Precision  oncology  testing  revenue  is  generated  from  sales  of  the
Company’s current products to clinical and biopharmaceutical customers. Total precision oncology testing revenues from sales to clinical customers for the years
ended December 31, 2019, 2018 and 2017 were $94.2 million, $43.7 million and $24.5 million, respectively. Total precision oncology testing revenues from sales
to  biopharmaceutical  customers  for  the  years  ended  December  31,  2019,  2018  and  2017  were  $79.5  million,  $34.7  million,  and  $17.6  million,  respectively.
Development  services  revenue  represent  services,  other  than  precision  oncology  testing,  that  we  provide  to  biopharmaceutical  companies  and  large  medical
institutions.

Leases

The  Company  adopted ASC  842,  Leases, and  its  related  amendments  which  requires  the  recognition  of  right-of-use  (“ROU”)  assets  and  lease  liabilities  for
operating  leases  on  the  consolidated  balance  sheet  on  January  1,  2019  using  a  modified  retrospective  transition  approach  by  applying  the  new  standard  to  all
leases existing at the date of initial application and not restating comparative periods. The Company elected the package of practical expedients permitted under
the transition guidance within the new standard, which among other things, allowed us to carry forward the historical lease classification of those leases in place
as  of  January  1,  2019.  The  Company  also  elected  the  practical  expedient  to  not  separate  lease  and  non-lease  components  for  its  facility  leases,  and  to  not
recognize ROU assets and operating lease liabilities for short-term leases.

Under ASC 842, the Company determines if an arrangement contains a lease and the classification of that lease, if applicable, at inception or upon modification
of a contract. The Company has elected to not recognize a lease liability or ROU asset for short-term leases (leases with a term of twelve months or less and does
not include an option to purchase the underlying asset that the Company is reasonably certain to exercise). The Company has elected to not allocate the contract
consideration for operating lease contracts with lease and non-lease components, and account for the lease and non-lease components as a single lease component.
ROU  assets  represent  the  Company's  right  to  use  an  underlying  asset  for  the  lease  term.  Lease  liabilities  represent  the  Company's  obligation  to  make  lease
payments under the lease. Operating lease ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments
over the lease term. In determining the present value of lease payments, the Company uses the incremental borrowing rate based on the information available at
lease commencement date. The operating lease ROU asset also includes any lease prepayments, net of lease incentives. Certain of the Company's leases include
options to extend or terminate the lease. An option to extend the lease

125

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

is considered in connection with determining the ROU asset and lease liability when it is reasonably certain we will exercise that option. An option to terminate is
considered unless it is reasonably certain that the Company will not exercise the option.

The  primary  impact  of  adopting  Topic  842  was  the  recognition  of  ROU  assets  and  lease  liabilities  for  operating  leases  of  $14.5  million  and  $22.4  million
respectively, on January 1, 2019, which included reclassifying prepaid rent and deferred rent as a component of the ROU asset. Topic 842 did not have a material
impact on the Company's consolidated statements of operations and cash flows.

The short-term liabilities from the Company's operating leases are included in accrued expenses in the consolidated balance sheet. The Company's accounting for
finance leases (formerly referred to as capital leases prior to the adoption of Topic 842) remains substantially unchanged. Finance leases are not material to the
consolidated financial statements.

Lease expense for lease payments for the operating leases is recognized on a straight-line basis over the term of the lease.

Stock Compensation

In  June  2018,  the  FASB  issued  ASU  2018-07,  Compensation—Stock  Compensation  (Topic  718):  Improvements  to  Nonemployee  Share-Based  Payment
Accounting,  which  expands  the  scope  of  Topic  718  to  include  share-based  payment  transactions  for  acquiring  goods  and  services  from  nonemployees,  with
certain exceptions. The Company early adopted this new guidance effective January 1, 2019. In accordance with the transition guidance, the Company assessed
its outstanding nonemployee awards for which a measurement date had not been established. These outstanding awards were re-measured to fair value as of the
January  1,  2019  adoption  date.  For  nonemployee  awards  that  contain  performance  condition,  the  measurement  is  based  on  the  outcome  that  is  probable  as
opposed  to  the  lowest  aggregate  fair  value  within  a  range  of  possible  outcomes.  The  adoption  of  ASU  2018-07  provided  administrative  relief  by  fixing  the
measurement  date  of  nonemployee  awards  and  eliminating  the  requirement  of  quarterly  re-measurement.  The  Company  adopted  this  standard  on  a  modified
retrospective basis and recorded a cumulative-effect adjustment of $1.3 million as an increase to accumulated deficit and an equal increase to additional paid-in
capital as of January 1, 2019.

Income Taxes

On December 22, 2017, the U.S. federal government enacted the Tax Cuts and Jobs Act (the “Tax Act”), which contains, among other things, significant changes
to  corporate  taxation,  including  reduction  of  the  corporate  tax  rate  from  a  top  marginal  rate  of  35%  to  a  flat  rate  of  21%  for  tax  years  beginning  after
December 31, 2017, limitation of the deduction for net operating losses to 80% of current year taxable income and elimination of net operating loss carrybacks,
implementing a territorial tax system, and requiring a mandatory one-time tax on U.S. owned undistributed foreign earnings and profits known as the transition
tax. In December 2017, SEC staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (“SAB 118”) to
address  the  accounting  implications  of  the  enacted  U.S.  federal  tax  reform.  SAB  118  allows  companies  to  record  provisional  amounts  during  a  measurement
period not to extend beyond one year of the enactment date to address ongoing guidance and tax interpretations that are expected over the next 12 months. The
Company  has  adopted  SAB  118  and  no  measurement  period  adjustments  were  recognized  due  to  the  full  valuation  allowance  on  the  Company’s  deferred  tax
assets.

Accounting Pronouncements Not Yet Adopted

Financial Instruments

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments, which amends the
impairment  model  by  requiring  entities  to  use  a  forward-looking  approach  based  on  expected  losses  to  estimate  credit  losses  on  certain  types  of  financial
instruments, including trade receivables and available for sale debt securities. The guidance is effective for the Company beginning January 1, 2020 with early
adoption permitted. The Company is currently evaluating the impact of the new guidance on its consolidated financial statements.

Goodwill

In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment which eliminates
Step 2 from the goodwill impairment test and instead requires entities to perform its annual or interim, goodwill impairment test by comparing the fair value of a
reporting unit with its carrying amount. The guidance is effective for the Company beginning January 1, 2020 with early adoption permitted. The Company is
currently evaluating the impact of the new guidance on its consolidated financial statements.

Fair Value Measurements

126

Table of Contents

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair
Value Measurement, which eliminates, adds and modifies certain disclosure requirements for fair value measurements in ASC 820, Fair Value Measurement, as
part of its disclosure framework project. The guidance is effective for the Company beginning January 1, 2020 with early adoption permitted. The amendments in
ASU 2018-13 on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value
measurements,  and  the  narrative  description  of  measurement  uncertainty  should  be  applied  prospectively  for  only  the  most  recent  interim  or  annual  period
presented  in  the  initial  fiscal  year  of  adoption.  All  other  amendments  in  ASU  2018-13  should  be  applied  retrospectively  to  all  periods  presented  upon  their
effective  date.  Early  adoption  is  permitted  upon  issuance  of  ASU  2018-13.  The  Company  is  currently  evaluating  the  impact  of  the  new  guidance  on  its
consolidated financial statements.

Cloud Computing

In  August  2018,  the  FASB  issued  ASU  2018-15—Intangibles-Goodwill  and  Other-Internal—Use  Software  (Subtopic  350-40):  Customer’s  Accounting  for
Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which requires a customer in a cloud computing arrangement that
is a service contract to follow the internal-use software guidance in ASC Topic 350, Intangibles—Goodwill and Other, to determine which implementation costs
to capitalize as assets or expense as incurred. The guidance is effective for the Company beginning January 1, 2020 with early adoption permitted. The Company
is currently evaluating the impact of the new guidance on its consolidated financial statements.

Collaborative Arrangements

In November 2018, the FASB amended ASC 808 and ASC 606 to clarify that certain transactions between participants in a collaborative arrangement should be
accounted for under ASC 606 when the counterparty is a customer. The guidance is effective for us beginning January 1, 2020 and early adoption is permitted.
The Company is currently evaluating the impact of the new guidance on its consolidated financial statements.

Income Taxes

In December 2019, the FASB issued ASU 2019-12, Income Taxes - Topic 740, which simplifies the accounting for income taxes.  Amendments include removal
of certain exceptions to the general principles of ASC 740, Income Taxes, related to the approach for intraperiod tax allocation, the methodology for calculating
income  taxes  in  an  interim  period,  and  the  recognition  of  deferred  tax  liabilities  for  outside  basis  differences.  ASU  2019-12  also  simplifies  aspects  of  the
accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of
goodwill.    The  guidance  is  effective  for  the  Company  beginning  January  1,  2021,  and  early  adoption  is  permitted.    The  Company  is  currently  evaluating  the
impact of the new guidance on its consolidated financial statements.

3. Investment in Joint Venture

Variable Interest Entity (“VIE”)

In connection with SoftBank’s purchase of its Series E convertible preferred stock, the Company entered into a joint venture agreement with an entity affiliated
with SoftBank, a related party. In May 2018, the Company and SoftBank formed and capitalized Guardant Health AMEA, Inc. (the “Joint Venture”) for the sale,
marketing and distribution of the Company’s tests in all areas worldwide, outside of North America, Central America, South America, the United Kingdom, all
other member states of the European Union as of May 2017, Iceland, Norway, Switzerland and Turkey. The Company expects to rely on the Joint Venture to
accelerate commercialization of its products in Asia, the Middle East and Africa, with an initial focus on Japan.

Under  the  terms  of  the  joint  venture  agreement,  the  Company  paid  $9.0 million  for  40,000  shares  of  common  stock,  or  50%  ownership  interest,  of  the  Joint
Venture, and the affiliate of SoftBank contributed $41.0 million for 40,000 shares of common stock, or the other 50% ownership interest, of the Joint Venture.
Neither party has the obligation to provide additional financial support to the Joint Venture. Each party holds two seats on the board of the Joint Venture and has
to cast through its representatives on the board at least one vote for any board resolution of the Joint Venture to pass. The representatives of the Company on the
Joint Venture’s board of directors have the right to appoint and remove a chief executive officer and a legal representative for the Joint Venture, in each case,
subject to the approval of the full Joint Venture board of directors. The Joint Venture’s board of directors has the right to appoint and remove all other members of
the  Joint  Venture’s  senior  management  reporting  to  its  chief  executive  officer  and  to  approve  the  compensation  of  all  foregoing  individuals,  including  the
compensation of the chief executive officer and legal representative.

At the inception of the arrangement and at the end of each reporting period, the Company assesses whether the Joint Venture is a variable interest entity (“VIE”),
and if so, who is the primary beneficiary of the VIE. As of December 31, 2019, the Company and SoftBank had equal ownership interests and equal voting rights
in the Joint Venture, and the Joint Venture’s board consisted of an equal number of directors representing the interest of the Company and SoftBank, respectively.
As  of  December  31,  2019,  the  Joint  Venture’s  board  had  the  right  to  vote  on  all  critical  matters  that  most  significantly  impact  the  Joint  Venture’s  economic
performance, except that the Company had the unilateral right to make pricing decisions. As of December 31, 2019, the Company had responsibility for the Joint
Venture’s  daily  operations,  while  SoftBank  served  as  a  financing  partner.  The  Company  also  entered  into  various  ancillary  agreements  with  the  Joint  Venture
necessary  to  operate  its  business.  The  Joint  Venture  is  deemed  to  be  a  VIE,  and  considering  the  power  and  benefits  criterion,  the  Company  and  SoftBank,
collectively as a related party group, has the characteristics of the primary beneficiary of the Joint Venture, as the related party group has the power to direct the
activities of the

127

Table of Contents

VIE that most significantly impact the VIE’s economic performance and has the obligation to absorb losses or the right to receive benefits from the VIE that
could potentially be significant to the VIE. Because the Company is most closely associated with the Joint Venture within the related party group, it has been
identified as the VIE’s primary beneficiary. As the primary beneficiary, the Company has consolidated the financial position, results of operations and cash flows
of the Joint Venture in its financial statements and all intercompany balances have been eliminated in consolidation. The Company concluded the Joint Venture
did  not  meet  the  definition  of  a  business  upon  consolidation  as  it  lacked  the  processes  required  to  generate  outputs.  Upon  consolidation  no  liabilities  were
assumed  and  other  than  cash,  and  any  identifiable  assets  were  related  to  intellectual  property  rights  that  the  Company  transferred  to  the  Joint  Venture  shortly
before it became its primary beneficiary and therefore such transfer was treated as a common control transaction. Upon initial consolidation, the non-controlling
interest of the affiliate of SoftBank was recorded at its estimated fair value of $41.0 million, which is equal to the original investment made by the affiliate of
SoftBank.

As  of  December  31,  2019,  the  Joint  Venture  had  total  assets  of  approximately  $45.1 million,  which  was  primarily  comprised  of  cash  and  security  deposits.
Although the Company consolidates the Joint Venture, the legal structure of the Joint Venture limits the recourse that its creditors will have over the Company’s
general credit or assets.  Similarly, the assets held in the Joint Venture can be used only to settle obligations of the Joint Venture. As of December 31, 2019, the
Company has not provided financial or other support to the Joint Venture that was not previously contracted or required.

Put-call arrangements

The  joint  venture  agreement  includes  a  put-call  arrangement  with  respect  to  the  shares  of  the  Joint  Venture  held  by  SoftBank  and  its  affiliates.  Under  certain
specified circumstances and on terms specified in the joint venture agreement, including timely written notice, SoftBank has the right to cause the Company to
purchase all shares of the Joint Venture held by SoftBank and its affiliates (the “put right”), and the Company has a right to purchase all such shares (the “call
right”).

If the Company’s business model were to change such that the sale, marketing and distribution of its tests in the territory covered by the joint venture agreement
was no longer economical, SoftBank would have the right to cause the Company to purchase, or the Company would have the right to purchase, all of the shares
of the Joint Venture held by SoftBank and its affiliates. In this instance, the Company would be required to repurchase the shares at an aggregate purchase price of
$41.0 million, the original purchase price paid by SoftBank to the Joint Venture for the shares.

Additionally, each of the Company and SoftBank may exercise its respective put-call rights for the Company to purchase all shares of the Joint Venture held by
SoftBank in the event of (i) certain material disagreements relating to the Joint Venture or its business that may seriously affect the ability of the Joint Venture to
perform its obligations under the joint venture agreement or may otherwise seriously impair the ability of the Joint Venture to conduct its business in an effective
matter, other than one relating to the Joint Venture’s business plan or to factual matters that may be capable of expert determination; (ii) the effectiveness of the
Company’s  initial  public  offering,  a  change  in  control  of  the  Company,  the  seventh  anniversary  of  the  formation  of  the  Joint  Venture,  or  each  subsequent
anniversary of each of the foregoing events; or (iii) a material breach of the joint venture agreement by the other party that goes unremedied within 20 business
days. Unless the shares of the Joint Venture are publicly traded and listed on a nationally recognized stock exchange, the purchase price per share of the Joint
Venture in these situations will be determined by a third-party valuation firm on the assumption that the sale is on an arm’s-length basis on the date of the put or
call notice. The third-party valuation firm may evaluate a range of factors and employ assumptions that are subjective in nature, which could result in the fair
value  of  SoftBank’s  interests  in  the  Joint  Venture  being  determined  to  be  materially  different  from  what  has  been  recorded  in  the  Company’s  consolidated
financial  statements  including  those  included  elsewhere  in  this  Annual  Report  on  Form  10-K.  As  a  result  of  the  IPO,  the  put-call  rights  for  the  Company  to
purchase all shares of the Joint Venture held by SoftBank are exercisable on each subsequent anniversary of the IPO by the Company or SoftBank.

In the event the Company exercises its call right, the fair value of the Joint Venture will be deemed to be no less than an amount that yields a 20% internal rate of
return  on  each  tranche  of  capital  invested  by  SoftBank  and  its  affiliates  in  the  Joint  Venture,  taking  into  account  all  proceeds  received  by  SoftBank  and  its
affiliates arising from their shares through such date.

In the event SoftBank exercises its put right and the fair value of the Joint Venture is determined to be greater than 40% of the fair value of the Company, the
Company will only be required to purchase the number of shares of the Joint Venture held by SoftBank and its affiliates having an aggregate value equal to the
product of 40% of the Company’s fair value and the pro rata portion of the outstanding shares of the Joint Venture held by SoftBank and its affiliates.

The Company may pay the purchase price for the shares of the Joint Venture in cash, in shares of its capital stock (which may be a non-voting security with senior
preferences to all other classes of its equity or, if its common stock is publicly

128

Table of Contents

traded on a national exchange, its common stock), or in a combination thereof. In the event the Company exercises the call right, SoftBank will choose the form
of consideration. In the event SoftBank exercises the put right, the Company will choose the form of consideration.

The  noncontrolling  interest  held  by  SoftBank  contains  embedded  put-call  redemption  features  that  are  not  solely  within  the  Company’s  control  and  has  been
classified  outside  of  permanent  equity  in  the  consolidated  balance  sheets.  The  put-call  feature  embedded  in  the  redeemable  noncontrolling  interest  do  not
currently require bifurcation as it does not meet the definition of a derivative and is considered to be clearly and closely related to the redeemable noncontrolling
interest.  The  noncontrolling  interest  is  considered  probable  of  becoming  redeemable  as  SoftBank  has  the  option  to  exercise  its  put  right  to  sell  its  equity
ownership in the Joint Venture to the Company on or after the seventh anniversary of the formation of the Joint Venture, on each subsequent anniversary of the
IPO  and  under  certain  other  circumstances.  The  Company  elected  to  recognize  the  change  in  redemption  value  immediately  as  they  occur  as  if  the  put-call
redemption  feature  were  exercisable  at  the  end  of  the  reporting  period.  The  carrying  value  of  the  redeemable  noncontrolling  interest  is  first  adjusted  for  the
earnings  or  losses  attributable  to  the  redeemable  noncontrolling  interest  based  on  the  percentage  of  the  economic  or  ownership  interest  retained  in  the
consolidated  VIE  by  the  noncontrolling  parties,  and  then  adjusted  to  equal  to  its  redemption  amount,  or  the  fair  value  of  the  noncontrolling  interest  held  by
SoftBank, as if the redemption were to occur at the end of the reporting date.

As  of  December  31,  2019,  the  fair  value  of  the  redeemable  noncontrolling  interest  held  by  SoftBank  was  determined  using  the  combination  of  the  income
approach and the market approach. Determining the fair value of the redeemable noncontrolling interest requires judgment and the use of significant estimates
and  assumptions.  Such  estimates  and  assumptions  include  future  revenue  growth  rates,  gross  profit  margins,  EBITDA  margins,  future  capital  expenditures,
weighted average costs of capital and future market conditions, among others. The fair value measurement of the redeemable noncontrolling interest is classified
within Level 3 of the fair value hierarchy. The change in the value of the redeemable noncontrolling interest consists of net loss of $3.9 million and increase in
fair value adjustment of $11.7 million for the year ended December 31, 2019.

4. Consolidated Balance Sheet Components

Property and Equipment, Net

Property and equipment, net consist of the following:

Machinery and equipment

Computer hardware

Leasehold improvements

Furniture and fixtures

Computer software

Construction in progress

Property and equipment, gross

Less: accumulated depreciation and amortization

Property and equipment, net

As of December 31,

2019

2018

(in thousands)

$

29,119   $

6,296  

21,031  

1,962  

829  

6,354  

65,591  

(21,923)  

$

43,668   $

23,440

4,949

13,965

1,522

643

3,118

47,637

(16,634)

31,003

Depreciation and amortization expense related to property and equipment was $9.3 million, $6.1 million and $4.2 million for the years ended December 31, 2019,
2018 and 2017, respectively.

129

 
 
 
 
Table of Contents

Accrued Expenses

Accrued expenses consist of the following:

Accrued royalty obligations

Accrued legal expenses

Accrued tax liabilities

Accrued professional services

Accrued clinical trials and studies

Purchases of property and equipment included in accrued expenses

Operating lease liabilities

Other

Total accrued expenses

As of December 31,

2019

2018

(in thousands)

1,564   $

1,046  

3,050  

3,464  

2,029  

2,424  

7,140  

4,986  

25,703   $

707

814

1,470

1,791

236

343

—

1,817

7,178

$

$

5. Fair Value Measurements, Cash Equivalents and Marketable Securities

Financial instruments consist of cash equivalents, marketable securities, prepaid expenses and other current assets, accounts payable and accrued expenses. Cash
equivalents and marketable securities are stated at fair value. Prepaid expenses and other current assets, accounts payable and accrued expenses are stated at their
carrying value, which approximates fair value due to the short time to the expected receipt or payment date.

Fair value is defined as the exchange price that would be received from sale of an asset or paid to transfer a liability in the principal or most advantageous market
for  the  asset  or  liability  in  an  orderly  transaction  between  market  participants  on  the  measurement  date.  The  identification  of  market  participant  assumptions
provides a basis for determining what inputs are to be used for pricing each asset or liability. A financial instrument’s classification within the fair value hierarchy
is based upon the lowest level of input that is significant to the fair value measurement.

A fair value hierarchy has been established which gives precedence to fair value measurements calculated using observable inputs over those using unobservable
inputs. This hierarchy prioritized the inputs into three broad levels as follows:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets
that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

130

 
 
 
 
Table of Contents

The Company’s financial assets and liabilities subject to fair value measurements on a recurring basis and the level of inputs used in such measurements were as
follows:

Financial Assets:

Money market funds

Total cash equivalents

Corporate bonds

U.S. government debt securities

Total short-term marketable securities

U.S. government debt securities

Total long-term marketable securities

Total

Financial Liabilities:

Contingent consideration

Financial Assets:

Money market funds

Total cash equivalents

Corporate bonds

U.S. government debt securities

U.S. government agency bonds

Total short-term marketable securities

Corporate bonds

U.S. government debt securities

Total long-term marketable securities

Total

Fair Value

Level 1

Level 2

Level 3

December 31, 2019

(in thousands)

10,734   $

10,734   $

10,734   $

10,734   $

—   $

—   $

16,690  

362,884  

379,574   $

268,783  

268,783  

—   $

—  

—   $

—   $

—  

16,690  

362,884  

379,574   $

268,783  

268,783  

659,091   $

10,734   $

648,357   $

—

—

—

—

—

—

—

—

1,365  

1,365   $

—  

—   $

—   $

—   $

1,365

1,365

Fair Value

Level 1

Level 2

Level 3

December 31, 2018

(in thousands)

25,796   $

25,796   $

25,796   $

25,796   $

—   $

—   $

38,397   $

235,016  

5,004    

278,417   $

3,805   $

73,758  

77,563   $

381,776   $

—   $

—  

—   $

—   $

—  

—   $

25,796   $

38,397   $

235,016  

5,004    

278,417   $

3,805   $

73,758  

77,563   $

355,980   $

—

—

—

—

—

—

—

—

—

$

$

$

$

$

$

$

$

$

$

$

$

$

$

$

The Company measures the fair value of money market funds based on quoted prices in active markets for identical securities. Corporate bonds, U.S. government
debt securities and U.S. government agency bonds are valued taking into consideration valuations obtained from third-party pricing services. The pricing services
utilize industry standard valuation models, including both income and market-based approaches, for which all significant inputs are observable, either directly or
indirectly,  to  estimate  fair  value.  These  inputs  include  reported  trades  of  and  broker/dealer  quotes  on  the  same  or  similar  securities,  issuer  credit  spreads;
benchmark securities; prepayment/default projections based on historical data; and other observable inputs.

The Company's contingent consideration was valued using the discounted cash flow method. Significant unobservable inputs used in the fair value measurement
of the Company’s contingent consideration liability include the estimated amount and timing of projected cash flows, and the risk-adjusted discount rate used to
present value the cash flows. The change in discount rate has an inverse relationship to the overall valuation of the contingent consideration.

131

 
 
 
 
 
 
 
   
   
   
 
 
   
   
   
 
 
   
   
   
 
 
   
   
   
 
   
   
   
 
 
 
 
 
 
 
 
   
   
   
 
 
   
   
   
 
 
 
   
   
   
Table of Contents

The use of different inputs in the valuation of the contingent consideration liability could result in materially different fair value estimates.

There were no transfers between Level 1, Level 2 and Level 3 during the periods presented.

Cash Equivalents and Marketable Securities

The following tables summarizes the Company’s cash equivalents and marketable securities’ amortized costs, gross unrealized gains, gross unrealized losses and
estimated fair values by significant investment category:

Money market fund

Corporate bond

U.S. government debt securities

Total

Money market fund

Corporate bond

U.S. government debt securities

U.S. government agency bonds................

Total

Amortized Cost

  Gross Unrealized Gain   Gross Unrealized Loss   Estimated Fair Value

December 31, 2019

10,734   $

16,679  

630,283  

657,696   $

(in thousands)

—   $

11  

1,422  

1,433   $

December 31, 2018

—   $

—  

(39)  

(39)   $

10,734

16,690

631,666

659,090

Amortized Cost

  Gross Unrealized Gain   Gross Unrealized Loss   Estimated Fair Value

25,796   $

42,273  

308,775  

5,014  

381,858   $

(in thousands)

—   $

—  

235  

—  

235   $

—   $

(71)  

(236)  

(10)  

(317)   $

25,796

42,202

308,774

5,004

381,776

$

$

$

$

There  have  been  no  material  realized  gains  or  losses  on  marketable  securities  for  the  periods  presented.  None  of  the  Company’s  investments  in  marketable
securities has been in an unrealized loss position for more than one year. The Company determined that it did have the ability and intent to hold all marketable
securities that have been in a continuous loss position until maturity or recovery, thus there has been no recognition of any other-than-temporary impairment in
the year ended December 31, 2019 and 2018. The maturities of the Company’s long-term marketable securities range from 1.04 to 1.75 years from December 31,
2019.

6. Acquisition of Bellwether Bio

In April 2019, the Company purchased of all of the outstanding shares of Bellwether Bio, Inc. (“Bellwether Bio”), a privately-held company developing a method
for early blood-based cancer detection. The Company accounted for the acquisition as a business combination. The total purchase consideration was $8.7 million,
which consisted of i)     $7.6 million in cash paid upon closing; and ii) future contingent consideration liability with a fair value of $1.1 million on the acquisition
date. The contingent consideration is subject to the achievement of certain commercialization milestones with a maximum payout amount of $10.0 million. The
Company  will  also  pay  additional  earn-out  consideration  of  up  to  $10.0 million  subject  to  the  achievement  of  certain  commercialization  milestones  and  the
continued  provision  of  services  to  the  Company  by  certain  former  employees  and  consultants  of  Bellwether  Bio.  The  contingent  consideration  and  earn-out
consideration may be paid, at the Company’s election, in cash or in the Company’s common stock. As of December 31, 2019, the Company did not believe the
earn-out consideration is probable to be achieved, and therefore, did not record any compensation expense.

The  excess  purchase  consideration  over  the  fair  value  of  assets  acquired  and  liabilities  assumed  was  recorded  as  goodwill.  Goodwill  is  attributable  to  future
revenue opportunities that we expect to achieve from leveraging Bellwether Bio’s existing license and IPR&D, as well as the assembled workforce. The valuation
of  the  intangible  assets  acquired  was  determined  using  currently  available  information  and  reasonable  assumptions.  The  following  table  summarizes  the
allocation of the total consideration to the estimated fair values of assets acquired and liabilities assumed:

132

 
 
 
 
 
 
Table of Contents

Cash

Identified intangible assets

Goodwill

Net liabilities assumed

Total

Amount

(in thousands)

521

6,700

3,289

(1,802)

8,708

  $

  $

The following table presents details of the identified intangible assets acquired from the Bellwether Bio acquisition:

Acquired license

IPR&D

Total

*

IPR&D assets are not subject to amortization.

Fair Value

(in thousands)

Estimated Useful
Life

  $

  $

5,100  

1,600  

6,700    

10 years

*

In  connection  with  the  acquisition  of  Bellwether  Bio,  the  Company  also  entered  into  non-compete  agreements  with  certain  key  individuals  based  on  their
experience  and  importance  to  the  operation  of  Bellwether  Bio.  The  Company  accounted  for  the  covenants  not  to  compete  as  purchases  of  intangible  assets
separate  from  the  business  combination  as  these  non-compete  agreements  were  initiated  by  the  Company  to  protect  its  interests.  The  fair  value  of  acquired
covenants not to compete was estimated to be $2.5 million, which is recorded within intangible assets on the consolidated balance sheet and will be amortized
over an estimated useful life of 6 years using the straight-line method.

The following table presents other intangible assets - net:

Weighted Average Useful Life

Gross

As of December 31, 2019

(in thousands)

Accumulated
Depreciation

  Net

Acquired license

Non-compete agreements

9.5

5.5

IPR&D

Goodwill

Total intangible assets

  $

  $

  $

  $

5,100   $

2,500  

7,600  

1,600  

3,290  

12,490   $

373   $

303  

676   $

—   $

—  

676   $

There were no intangible assets as of December 31, 2018.

The following table summarizes estimated future amortization expense of finite-lived intangible assets—net:

Years

2020

2021

2022

2023

2024 and thereafter

Total

Amount

(in thousands)

$

$

4,727

2,197

6,924

1,600

3,290

11,814

928

928

928

928

3,212

6,924

Acquisition-related contingent consideration is measured at fair value on a quarterly basis based on additional information as it becomes available and change in
estimated contingent consideration to be paid will be included in

133

 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
   
 
   
   
   
   
   
   
 
   
 
Table of Contents

operating  expenses  in  the  consolidated  statements  of  operations.  The  fair  value  of  acquisition-related  contingent  consideration  is  estimated  using  a  multiple-
outcome discounted cash flow valuation technique. Contingent consideration is classified within Level 3 of the fair value hierarchy, as it is based on a probability
that  includes  significant  unobservable  inputs.  The  significant  unobservable  inputs  include  a  probability-weighted  estimate  of  achievement  of  certain
commercialization  milestones,  continued  services  from  certain  former  employees  and  consultants,  resulting  contingent  payments,  and  discount  rate  to  present
value the expected payments. A significant change in any of these input factors in isolation could have a material impact to fair value measurement.

Since initial valuation on the date of acquisition, contingent consideration liability increased by $0.3 million due to change in estimate relating to inputs used to
determine the fair value of contingent consideration. As of December 31, 2019, contingent consideration liability of $1.4 million was recorded within other long-
term liabilities on the consolidated balance sheet.

For  the  period  ended  December  31,  2019,  the  Company  incurred  acquisition-related  transaction  costs  of  $0.4  million  which  are  included  in  general  and
administrative expenses in the consolidated statements of operations.

7. Patent License Agreement

In  January  2017,  the  Company  entered  into  a  license  agreement  with  a  biotechnology  company  for  an  exclusive,  non-transferable  right  to  use  proprietary
technology related to high-throughput screening and identification of mutations in targeted gene sequences. The payment terms of the license agreement included
(i) a one-time upfront payment of €1.0 million; (ii) issuance of 141,774 shares of the Company’s Series D convertible preferred stock; (iii) a milestone payment of
€1.0 million associated with the achievement of a specified milestone event; and (iv) future royalty payments at the minimum of €13.4 million in the aggregate
based  on  annual  net  sales  in  which  the  licensed  technology  are  used.  The  Company  made  a  one-time  upfront  payment  of  $1.1 million  in  January  2017  and  a
milestone payment of $1.2 million in August 2017 upon achievement of the specified milestone event. The Series D convertible preferred stock issued under the
license agreement had a fair value of $1.1 million on the date of issuance. The transaction was treated as an acquisition of an asset and the Company capitalized
the upfront payment, milestone payments and fair value of Series D convertible preferred stock in addition to license fees of $6.3 million related to the future
minimum royalty payments discounted to the present value. The Company recorded the obligation at the estimated present value of the future payments using a
discount rate of 15%, the Company’s estimate of its effective borrowing rate for similar obligations.

As of December 31, 2019 and 2018, unamortized capitalized license fees plus one-time upfront and milestone payments totaled $6.9 million and $7.8  million,
respectively,  which  will  be  amortized  over  the  remaining  useful  life  of  7.0 and 8.0  years,  respectively.  Amortization  of  capitalized  license  fees  plus  one-time
upfront and milestone payments totaled $1.0 million and $0.9 million for the years ended December 31, 2019 and 2018, respectively.

8. Senior Term Loan and Royalty Purchase Agreement

In  2015,  the  Company  entered  into  a  credit  agreement  with  a  financial  institution  for  a  senior  term  loan  (the  “Credit  Agreement”).  The  Credit  Agreement
provided  for  up  to  $40.0  million  in  borrowing  capacity.  The  Company  borrowed  $20.0  million  on  the  effective  date  of  the  Credit  Agreement.  The  Credit
Agreement provided for an interest rate equal to the greater of (i) three-month LIBOR or (ii) 1% per annum plus 8.75% on the outstanding balance of the term
loan not exceeding $20.0 million.

Concurrent  with  the  Credit  Agreement,  the  Company  also  entered  into  a  Royalty  Purchase  Agreement  (the  “Royalty  Agreement”)  with  the  same  financial
institution, which obligated the Company to make quarterly royalty payments of (i) 1.5% applied to total Company fiscal year revenues of up to $50 million and
(ii) 2.45%  applied  to  fiscal  year  revenues  in  excess  of  $50 million.  The  Royalty  Agreement  included  a  buyout  option,  by  which  the  Company  had  the  right,
exercisable in its sole discretion, to buy out the obligation to make future royalty payments. The price of this buyout option was calculated based on a table with
axes of principal balance outstanding and time, less the cumulative sum of royalty payments at the time the buy-out option is exercised.

In June 2017, the Company exercised its prepayment right under the Credit Agreement and repaid the outstanding principal balance of $19.8 million and accrued
interest of $0.7 million. The prepayment option also required the Company to pay a prepayment penalty of $1.5 million. Concurrent with the prepayment of the
senior  term  loan,  the  Company  also  excised  its  royalty  buyout  option  for  $4.5 million.  The  transaction  was  accounted  for  as  a  debt  extinguishment.  The  net
carrying amount of the debt and royalty liabilities immediately before the extinguishment was $20.7 million. As a result, the difference between the reacquisition
price and the net carrying amount of $5.1 million was recorded as loss on debt extinguishment in the accompanying consolidated statements of operations. As of
December 31, 2019 and 2018, the Company had no outstanding balance under the senior term loan and its related royalty obligations.

134

9. Leases

The Company has entered into various operating lease agreements for office space, with remaining terms ranging from 1 year to 8 years some of which include
one  or  more  options  to  renew.  As  leases  approach  maturity,  the  Company  considers  various  factors  such  as  market  conditions  and  the  terms  of  any  renewal
options  that  may  exist  to  determine  whether  we  will  renew  the  lease,  as  such,  we  do  not  include  renewal  options  in  our  lease  terms  for  calculating  our  lease
liability, as the renewal options allow us to maintain operational flexibility and we are not reasonably certain we will exercise these renewal options at the time of
the lease commencement.

Operating lease expense for the year ended December 31, 2019 was $4.4 million which includes both lease and non-lease components (primarily common area
maintenance charges and property taxes).

Rent expense for the facility leases was $4.6 million and $1.8 million for the years ended December 31, 2018 and 2017, respectively.

As  of  December  31,  2019,  the  weighted-average  remaining  lease  term  and  weighted-average  discount  rate  for  operating  leases  is  6.4  years  and  7.77%
respectively.

The following table summarizes our future principal contractual obligations for operating lease commitments as of
December 31, 2019:

Year Ending December 31,

2020

2021

2022

2023

2024 and thereafter

Total operating lease payments

Less: Imputed Interest

Total operating lease liabilities

(in thousands)

7,582

7,534

7,684

8,276

20,816

51,892

(11,496)

40,396

$

$

$

As of December 31, 2019, the Company has additional future minimum lease payments relating to a facility agreement had not yet commenced amounting to
$13.7 million (imputed interest of $3.4 million) net of sublease income of $0.1 million.

Finance leases are not material to the Company's consolidated financial statements.

ASC 840 Disclosures

The Company elected modified retrospective transition approach and is required to present previously disclosed information under the prior accounting standards
for leases. Total minimum lease payments as of December 31, 2018 are as follows:

Year Ending December 31,

2019

2020

2021

2022

2023

2024 and thereafter

Total

(in thousands)

$

$

4,099

5,273

5,358

5,557

6,105

15,786

42,178

135

 
 
 
 
Table of Contents

10. Commitments and Contingencies

License Agreements

The  Company  has  patent  license  agreements  with  four  different  parties.  Under  these  agreements,  the  Company  has  made  one-time  upfront  and  milestone
payments, which it has capitalized and is amortizing to expense ratably over the useful life of the underlying patent right(s). Under some of these agreements, the
Company is obligated to pay low single-digit percentage running royalties on net sales where the licensed patent right(s) are used in the product or service sold,
subject to minimum annual royalties or fees in certain agreements.

Royalty  expenses  were  included  in  cost  of  precision  oncology  testing  on  the  accompanying  consolidated  statements  of  operations.  The  Company  recognized
royalty expenses of $4.4 million, $1.4 million and $1.1 million, or 2%, 2% and 2%  of  precision  oncology  testing  revenue  in  each  period,  for  the  years  ended
December 31, 2019, 2018 and 2017, respectively. As of December 31, 2019, future minimum royalty payments are due as follows regardless of sales amounts:

Year Ending December 31,

2020

2021

2022

2023

2024 and thereafter

Total future minimum royalty payments

Less: amount representing interest

Present value of future minimum royalty payments

Indemnification Agreements

(in thousands)

1,402

1,402

1,682

1,682

5,607

11,775

(4,895)

6,880

$

$

The Company has entered into indemnification agreements with certain directors and officers that 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. To date, no such matters have arisen and the Company does not
believe that the outcome of any claims under indemnification arrangements will have a material adverse effect on its financial positions, results of operations or
cash flows. Accordingly, the Company has not recorded a liability related to such indemnifications as of December 31, 2019.

Security Incidents

In connection with a former employee’s complaints alleging non-compliance with applicable provisions of the Health Insurance Portability and Accountability
Act of 1996, the Company received requests for information from the Office for Civil Rights, or OCR, of the U.S. Department of Health and Human Services in
August 2019. After the Company responded to these requests, the Company was informed by the OCR that it has closed this matter without further action.

Legal Proceedings

The Company is subject to claims and assessments from time to time in the ordinary course of business. The Company will accrue a liability for such matters
when it is probable that a liability has been incurred and the amount can be reasonably estimated. When only a range of possible loss can be established, the most
probable amount in the range is accrued. If no amount within this range is a better estimate than any other amount within the range, the minimum amount in the
range is accrued. The accrual for a litigation loss contingency might include, for example, estimates of potential damages, outside legal fees and other directly
related costs expected to be incurred.

Patent Disputes

In May 2016, Foundation Medicine, Inc. (“Foundation Medicine”) filed a lawsuit for patent infringement against the Company in the United States District Court
for the Eastern District of Texas, alleging that the Company infringed Foundation Medicine’s patent relating to its tissue biopsy assay technology and seeking
compensatory damages and attorneys’ fees. The Company filed three petitions for inter partes review (“IPR”) with the Patent Trial and Appeal Board (“PTAB”)
at the U.S. Patent and Trademark Office, challenging the patentability of Foundation Medicine’s patent. In July 2018, the Company reached an agreement with
Foundation Medicine to settle the lawsuit and resolve the IPRs. As part of the settlement agreement, which was accepted by the PTAB and the United States
District Court,

136

 
 
Table of Contents

the  Company  made  a  one-time  payment  of  $3.0  million  to  Foundation  Medicine.  The  Company  recorded  $3.0  million  as  litigation  settlement  expense,  a
component of general and administrative expenses, at December 31, 2017.

In November 2017, the Company filed separate lawsuits against Foundation Medicine and Personal Genome Diagnostics, Inc. (“Personal Genome Diagnostics”)
in the United States District Court for the District of Delaware, alleging that each of the two companies has infringed a patent relating to the Company’s digital
sequencing technology. The Company subsequently amended its original complaints in each case to assert infringement of three additional patents relating to its
digital  sequencing  technology.  In  each  lawsuit,  the  Company  is  seeking  compensatory  damages,  injunctive  relief  and  attorneys’  fees.  Personal  Genome
Diagnostics and Foundation Medicine have each asserted counterclaims of patent invalidity and non-infringement. In March 2018, Personal Genome Diagnostics
filed two petitions for post-grant review with the PTAB, challenging the patentability of two of the patents asserted by the Company. Prior to reaching a decision
on the merits, the two post-grant review petitions were dismissed with prejudice in July 2018. Subsequently, Foundation Medicine filed six petitions for inter
partes review with the PTAB, challenging the patentability of all four of the patents asserted by the Company, which actions are currently pending at the PTAB.
The Company plans to vigorously defend its patent rights during such PTAB actions. At this time, the Company cannot reasonably ascertain the likelihood that
any of the challenged patents will be found to be invalid or unenforceable.

License Dispute

In  November  2018,  the  Company  filed  a  request  for  arbitration  to  the  International  Chamber  of  Commerce  claiming  that  one  of  its  licensors,  KeyGene  N.V.
(“Licensor”), has breached its patent license agreement with the Company. In January 2019, Licensor responded with its answer and counterclaims and alleged
that the Company has breached the patent license agreement. The Company subsequently followed up with supplemental claims, for which Licensor responded
with its supplemental answer. The Company is seeking damages, declaratory relief and alternative forms of relief including recession and reformation to address
Licensor’s  alleged  breaches  of  the  patent  license  agreement.  Licensor  is  seeking  damages,  recovery  of  costs  and  fees  and  declaratory  relief  in  addition  to  the
dismissal of the Company’s claims. The arbitration is in preliminary stages, and no date has been set for rendering a final decision. At this time, the Company
cannot reasonably ascertain the likelihood that any of its claims or Licensor’s counterclaims will be heard by the arbitration panel or succeed on the merits.

Other Disputes

In the first quarter of 2018, the Company settled a commercial dispute. In connection with the settlement, the Company received a payment of $4.25  million,
which was reported as other income in the consolidated statements of operations for the year ended December 31, 2018.

11. Common Stock

The  Company’s  common  stockholders  are  entitled  to  dividends  if  and  when  declared  by  the  Company’s  Board  of  Directors  (the  “Board  of  Directors”).  As  of
December 31, 2019 and 2018, no dividends on the Company’s common stock had been declared by the Board of Directors.

The Company’s common stock has been reserved for the following potential future issuances:

Shares underlying outstanding stock options

Shares available for future stock option grants

Shares available for issuance under the 2018 Employee Stock Purchase Plan

Total

Reverse Stock Split

As of December 31,

2019

2018

4,494,889  

2,726,225  

689,917  

7,911,031  

7,588,405

3,556,507

922,250

12,067,162

In September 2018, the Board of Directors and its stockholders approved a 0.7378-for-one reverse stock split of the Company’s common stock. The reverse stock
split  became  effective  on  September  19,  2018.  The  par  value  of  the  common  stock  was  not  adjusted  as  a  result  of  the  reverse  stock  split.  Adjustments
corresponding to the reverse stock split were made to the ratio at which the convertible preferred stock was convertible into common stock immediately prior to
the closing of the IPO.

137

 
 
 
Table of Contents

Initial Public Offering

On October 9, 2018, the Company completed the IPO, in which it issued and sold 14,375,000 shares of its common stock at a price of $19.00 per share. The
Company received net proceeds of $249.5 million after deducting underwriting discounts and commissions and offering expenses payable by the Company. All
then-outstanding  warrants  to  purchase  the  Company’s  common  stock  were  exercised  prior  to  the  completion  of  the  IPO.  In  addition,  in  connection  with  the
IPO, all shares of the Company’s then-outstanding convertible preferred stock were automatically converted into 58,264,577 shares of its common stock, and all
then-outstanding  warrants  to  purchase  the  Company’s  convertible  preferred  stock  were  automatically  converted  into  warrants  to  purchase  7,636  shares  of  the
Company’s common stock.

Follow-on Offering

In May 2019, the Company completed an underwritten public offering, in which it issued and sold 5,175,000 shares of its common stock at a price of $71.00 per
share.  The  Company  received  net  proceeds  of  $349.7 million  after  deducting  underwriting  discounts  and  commissions  and  offering  expenses  payable  by  the
Company.

12. Warrants

In  connection  with  a  bank  loan  agreement  with  a  financial  institution  in  September  2013,  the  Company  issued  warrants  to  purchase  5,386  shares  of  Series  A
convertible preferred stock at an exercise price of $0.93 per share. In October 2014, the Company issued additional warrants to the same financial institution to
purchase 4,965 shares of Series B convertible preferred stock at an exercise price of $3.16 per share. These preferred stock warrants were converted to warrants to
purchase common stock upon the consummation of the IPO and were net exercised into 6,548 shares of common stock in October 2018. No warrants remained
outstanding as of December 31, 2019 and 2018.

In 2012, the Company issued to certain investors warrants to purchase 495,775 shares of common stock. The exercise price of the warrants is $0.14 per share and
the warrants have a contractual term through September 2023. For the year ended December 31, 2018 and 2017, 313,741 and 89,030 shares, respectively, were
issued upon the exercise of these warrants. As of December 31, 2017, warrants to purchase 313,741 shares of common stock were outstanding, and these warrants
were fully exercised prior to the consummation of the IPO in October 2018.

13. Convertible Preferred Stock

The Company previously issued convertible preferred stock in one or more series, each with such designations, rights, qualifications, limitations, and restrictions
as  set  forth  in  the  Company’s  certificate  of  incorporation,  as  in  effect  prior  to  the  IPO.  Immediately  prior  to  the  completion  of  the  IPO,  as  described  in  Note
1, Description of Business, all shares of convertible preferred stock then outstanding were automatically converted to 58,264,577 shares of common stock at the
respective conversion ratios in October 2018.

In  May  2017,  the  Company  entered  into  the  Series  E  convertible  preferred  stock  purchase  agreement  with  SoftBank  and  certain  of  the  Company’s  existing
stockholders. Pursuant to the purchase agreement, the Company issued and sold an aggregate of 38,174,246 shares of Series E convertible preferred stock at a
purchase price of $8.3936 per share, for an aggregate purchase price of $320.4 million. The purchase agreement also provided that the Company would issue
additional shares of Series E convertible preferred stock to the Series E investors in such an amount as to cause SoftBank’s equity ownership in the Company to
equal 35% of the Company’s outstanding fully-diluted capital stock measured 70 days after the initial closing. This gross-up was intended to enable the Company
to engage in various repurchases of its equity from existing stockholders and still maintain SoftBank’s equity ownership at 35%. As a result, in July 2017, the
Company  repurchased  an  aggregate  of  1,588,065  shares  of  common  stock  from  certain  of  its  directors  and  executive  officers  for  a  purchase  price
of $10.23887 per share, which represented a price equal to 90% of the original price per shares for the Series E convertible preferred stock, as adjusted to reflect
the 0.7378-for-one reverse stock split of the Company’s common stock effected on September 19, 2018. The Company also engaged in a tender offer pursuant to
which it repurchased 131,243 shares of common stock from certain employees at the same per share price paid for the Series E convertible preferred stock as
adjusted  to  reflect  the  0.7378-for-one  reverse  stock  split  of  the  Company’s  common  stock  effected  on  September  19,  2018,  and  666,920  shares  of  Series  A
convertible preferred stock from existing stockholders at a purchase price of $8.00 per share of Series A convertible preferred stock. Following these repurchases,
in  October  2017,  the  Company  issued  an  additional  796,346  shares  of  Series  E  convertible  preferred  stock  to  the  Series  E  investors  for  a  purchase  price  of
$0.00001 per share pursuant to the terms of the gross up provision. The conversion price of Series E convertible preferred stock was adjusted as a result of the
dilutive issuance of Series E convertible preferred stock under the gross up provision.

138

Table of Contents

In May 2017, in accordance with its certificate of incorporation then in effect, the Company adjusted the conversion price of Series D convertible preferred stock
from $10.1338 per share to $9.8329 per share. The Company accounted for the transaction as a modification. A deemed dividend of $1.1 million, calculated as
the  additional  253,361  shares  of  common  stock  to  be  received  upon  the  conversion  of  the  Series  D  convertible  preferred  stock  after  the  conversion  ratio
adjustment, multiplied by the then current fair value of the Company’s common stock, was reported as an increase to net loss attributable to common stockholders
for the year ended December 31, 2018.

Repurchase of Series A Convertible Preferred Stock

During the year ended December 31, 2017, the Company repurchased 666,920 shares of outstanding Series A convertible preferred stock at a price of $8.00 per
share for a total consideration of $5.3 million. The difference between the repurchase amount and the carrying value of these shares of $4.7 million was recorded
as a deemed dividend in accumulated deficit on the accompanying consolidated statements of stockholders’ equity.

14. Stock-Based Compensation

2012 Stock Plan and 2018 Incentive Award Plan

In June 2012 and September 2018, the Company’s Board of Directors adopted and its stockholders approved the Company’s 2012 Stock Plan (as amended and
restated, the “2012 Plan”) and the Company’s 2018 Incentive Award Plan (the “2018 Plan”), respectively, under which the Company may grant cash and equity
incentive awards such as stock options, restricted shares, stock units and stock appreciation rights to its employees and non-employees. Stock options granted
may  be  either  incentive  stock  options  or  nonstatutory  stock  options.  Shares  issued  under  the  2018  Plan  may  be  authorized  but  unissued  shares,  or  shares
purchased in the open market or treasury shares. Upon effectiveness of the 2018 Plan in connection with the IPO in October 2018, the 2012 Plan was terminated
and 508,847 shares reserved under the 2012 Plan were forfeited. Any outstanding awards granted under the 2012 Plan remain outstanding, subject to the terms of
the 2012 Plan and applicable award agreement, and further cancellation of awards granted under the 2012 Plan are not available for grant in the future. No further
grants will be made under the 2012 Plan.

139

Table of Contents

Stock Option Activity

A summary of the Company’s stock option activity under the 2012 Plan and the 2018 Plan and related information is as follows:

Shares
Available for
Grant 

Shares Subject to
Options Outstanding

Weighted-Average
Exercise Price 

Weighted-Average
Remaining
Contractual Life
(Years)

Options Outstanding

Aggregate Intrinsic
Value

(in thousands)

Balance as of December 31, 2017

Shares authorized

Shares forfeited

Granted

Exercised

Canceled

Repurchase of early exercised shares

1,698,790  

3,658,602  

(508,847)  

(2,088,639)  

—  

795,371  

1,230  

7,391,052   $

3.63  

8.6   $

3,325

—    

—    

2,088,639  

(1,007,387)  

(883,899)  

—    

7.19    

3.09    

4.57    

Balance as of December 31, 2018

3,556,507  

7,588,405   $

4.58  

8.3  

250,495

Shares authorized

Shares forfeited

Granted

Exercised

Canceled

Repurchase of early exercised shares

—  

—  

(324,579)  

—  

12,636  

—  

—    

—    

324,579  

(2,999,419)  

(418,676)  

—    

88.18    

3.87    

6.64    

Balance as of December 31, 2019

3,244,564  

4,494,889   $

10.90  

Vested and Exercisable as of December 31,

2019

1,908,216   $

5.27  

7.7   $

7.2   $

306,392

139,337

Aggregate intrinsic value represents the difference between the estimated fair value of the underlying common stock and the exercise price of outstanding, in-the-
money options. The total intrinsic value of the options exercised was $218.2 million, $8.4 million and $0.6 million for the years ended December 31, 2019, 2018
and 2017, respectively.

The weighted-average grant date fair value of options granted was $52.37, $5.17 and $2.90 per share for the years ended December 31, 2019, 2018 and 2017,
respectively.

Future stock-based compensation for unvested options as of December 31, 2019 was $26.0 million, which is expected to be recognized over a weighted-average
period of 2.7 years.

In December 2019, the Company modified one of the performance based awards issued to a nonemployee which resulted in reversal of expense of $1.0 million
due to options not vested.

Restricted Stock Units

A summary of the Company’s restricted stock unit activity under the 2012 Plan and the 2018 Plan and related information is as follows:

140

 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
 
 
Table of Contents

Balance as of December 31, 2018

Granted

Vested

Canceled

Balance as of December 31, 2019

Restricted Stock
Units Outstanding

Weighted-Average
Grant Date Fair
Value

—   $

567,425  

(22,208)  

(49,086)  

496,131   $

—

78.61

47.78

57.51

82.08

162

507

80

2,921

3,670

Future stock-based compensation for unvested restricted stock units as of December 31, 2019 was $36.5 million, which is expected to be recognized over a
weighted-average period of 3.5 years.

Stock‑Based Compensation Expense

The following table presents the effect of employee and non‑employee related stock‑based compensation expense:

Cost of precision oncology testing

Research and development expense

Sales and marketing expense

General and administrative expense

Total stock-based compensation expense

Valuation of Stock Options

Year Ended December 31,

2019

2018

2017

$

$

(in thousands)

863   $

512   $

5,907  

4,716  

5,468  

1,684  

1,727  

2,928  

16,954   $

6,851   $

Starting January 1, 2019, the Company adopted ASU 2018-07 which aligns the accounting treatment of nonemployee awards with employee awards, and the fair
value of stock options issued to employees and nonemployee consultants are both determined as of the grant date. 

The grant date fair value of employee and nonemployee stock options was estimated using a Black-Scholes option-pricing model with the following weighted-
average assumptions:

Expected term (in years)

Expected volatility

Risk-free interest rate

Expected dividend yield

Year Ended December 31,

2019

2018

2017

5.50 – 6.22

63.2% – 68.7%

1.6% – 2.7%

—%

5.01 – 6.51

68.7% – 78.8%

2.5% – 3.0%

—%

6.02 – 6.08

74.1% – 75.1%

1.9% – 2.2%

—%

The determination of the fair value of stock options on the date of grant using a Black-Scholes option-pricing model is affected by the estimated fair value of the
Company’s common stock, as well as assumptions regarding a number of variables that are complex, subjective and generally require significant judgment to
determine. The valuation assumptions were determined as follows:

Fair Value of Common Stock

Prior  to  the  IPO,  the  grant  date  fair  value  of  the  Company’s  common  stock  was  determined  by  the  Company’s  Board  of  Directors  with  the  assistance  of
management  and  an  independent  third-party  valuation  specialist.  The  grant  date  fair  value  of  the  Company’s  common  stock  was  determined  using  valuation
methodologies  which  utilizes  certain  assumptions  including  probability  weighting  of  events,  volatility,  time  to  liquidation,  a  risk-free  interest  rate  and  an
assumption for a discount for lack of marketability (Level 3 inputs). In determining the fair value of the Company’s

141

 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

common  stock,  the  methodologies  used  to  estimate  the  enterprise  value  of  the  Company  were  performed  using  methodologies,  approaches,  and  assumptions
consistent with the American Institute of Certified Public Accountants Accounting and Valuation Guide, Valuation of Privately-Held-Company Equity Securities
Issued as Compensation. Subsequent to the IPO, the fair value of the Company’s common stock is determined by the closing price, on the date of grant, of its
common stock, which is traded on the Nasdaq Global Select Market.

Expected Term

The expected term represents the period that the options granted are expected to be outstanding and is determined using the simplified method (based on the mid-
point  between  the  vesting  date  and  the  end  of  the  contractual  term)  as  the  Company  has  concluded  that  its  stock  option  exercise  history  does  not  provide  a
reasonable basis upon which to estimate expected term.

Expected Volatility

Prior to the commencement of trading of the Company’s common stock on the Nasdaq Global Select Market on October 4, 2018 in connection with the IPO,
there was no active trading market for the Company’s common stock. Due to limited historical data for the trading of the Company’s common stock, expected
volatility is estimated based on the average volatility for comparable publicly traded peer group companies in the same industry plus the Company's expected
volatility for the available periods. The comparable companies are chosen based on their similar size, stage in the life cycle or area of specialty.

Risk-Free Interest Rate

The risk-free interest rate is based on the U.S. Treasury rate, with maturities similar to the expected term of the stock options.

Expected Dividend Yield

The Company does not anticipate paying any dividends in the foreseeable future and, therefore, uses an expected dividend yield of zero.

2018 Employee Stock Purchase Plan

In September 2018, the Company’s Board of Directors adopted and its stockholders approved the 2018 Employee Stock Purchase Plan (the “ESPP”). A total of
922,250 shares of common stock are initially reserved for issuance under the ESPP. The number of shares may be increased in accordance with the terms of the
ESPP.

Subject  to  any  plan  limitations,  the  ESPP  allows  eligible  employees  to  contribute,  normally  through  payroll  deductions,  up  to  10%  of  their  earnings  for  the
purchase of the Company’s common stock at a discounted price per share. The price at which common stock is purchased under the ESPP is equal to 85% of the
fair  market  value  of  the  Company’s  common  stock  on  the  first  or  last  day  of  the  offering  period,  whichever  is  lower.  The  initial  offering  period  ran  from
October 2, 2018 to January 31, 2019, the second offering period ran from February 1, 2019 to July 31, 2019, and the third offering period began on August 1,
2019  and  ran  to  November  14,  2019.  On  a  going  forward  basis,  the  ESPP  will  provide  for  separate  six-month  offering  periods  beginning  on  May  15  and
November 15 of each year.

During the year ended December 31, 2019, 232,333 shares were purchased under the ESPP. No shares were purchased under the ESPP during the year ended
December 31, 2018. The total compensation expense related to the ESPP for year ended December 31, 2019 and December 31, 2018 was $2.3 million and $0.3
million, respectively.

The fair value of the stock purchase right granted under the ESPP was estimated on the first day of each offering period using the Black-Scholes option pricing
model. The following assumptions were used to calculate the stock-based compensation for each stock purchase right granted under the ESPP:

Expected term (in years)

Expected volatility

Risk-free interest rate

Expected dividend yield

Year Ended December 31,

2019

0.29 – 0.5

58.8% – 60.3%

1.6% – 2.5%

—%

2018

0.33

43.6%

2.4%

—%

142

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Future stock-based compensation under the ESPP as of December 31, 2019 was $0.8 million, which is expected to be recognized over a weighted-average period
of 0.4 years.

Liabilities for Early Exercise of Employee Options

The Company allowed certain stock option holders to exercise unvested options to purchase shares of the Company’s common stock. Shares received from such
early exercises are subject to repurchase in the event of the optionee’s employment termination, at the original issuance price, until the options are fully vested.
As of December 31, 2019 and 2018, 23,981 shares and 44,268 shares of common stock were subject to repurchase at weighted-average price of $4.66 per share.
As  of  December  31,  2019  and  December  31,  2018,  the  cash  proceeds  received  for  unvested  shares  of  common  stock  of  $0.1  million  and  $0.2  million  was
recorded within other long-term liabilities on the consolidated balance sheet, respectively. The shares issued pursuant to unvested options have been included in
shares  issued  and  outstanding  on  the  consolidated  balance  sheet  and  consolidated  statement  of  redeemable  noncontrolling  interest  and  stockholders’  equity  as
such shares are considered legally outstanding.

15. Net Loss Per Share Attributable to Guardant Health, Inc. Common Stockholders

The following table sets forth the computation of the basic and diluted net loss per share attributable to Guardant Health, Inc. common stockholders:

Net loss

Adjustment of redeemable noncontrolling interest

Net loss attributable to Guardant Health, Inc.

Deemed dividend related to repurchase of Series A convertible preferred stock

Deemed dividend related to change in conversion rate of Series D convertible preferred stock

Net loss attributable to Guardant Health, Inc. common stockholders, basic and diluted

Net loss per share attributable to Guardant Health, Inc. common stockholders, basic and

diluted

Weighted-average shares used in computing net loss per share attributable to Guardant Health,

Inc. common stockholders, basic and diluted

143

Year Ended December 31,

2019

2018

2017

(in thousands, except per share data)

(67,851)   $

(84,263)   $

(83,221)

(7,800)  

(75,651)  

—  

—  

(800)  

(85,063)  

—  

—  

(75,651)   $

(85,063)   $

—

(83,221)

(4,716)

(1,058)

(88,995)

(0.84)   $

(2.80)   $

(7.07)

90,597  

30,403  

12,582

$

$

$

 
 
 
 
 
Table of Contents

Since the Company was in a loss position for all periods presented, basic net loss per share attributable to Guardant Health, Inc. common stockholders is the same
as  diluted  net  loss  per  share  attributable  to  Guardant  Health,  Inc.  common  stockholders,  as  the  inclusion  of  all  potential  shares  of  common  stock  outstanding
would  have  been  anti-dilutive.  The  following  weighted-average  common  stock  equivalents  were  excluded  from  the  calculation  of  diluted  net  loss  per  share
attributable to Guardant Health, Inc. common stockholders for the periods presented as they had an anti-dilutive effect:

Convertible preferred stock (on an as if converted basis)

Stock options issued and outstanding

ESPP obligation

Preferred stock warrants (on an as if converted basis)

Common stock warrants

Restricted stock units

Common stock subject to repurchase

Total

144

Year Ended December 31,

2019

2018

2017

(in thousands)

—  

5,976  

52  

—  

—  

252  

31  

43,898  

7,527  

22  

6  

208  

—  

46  

44,818

5,179

—

8

382

—

28

6,311  

51,707  

50,415

 
 
 
 
 
16. Income Taxes

The components of loss before provision for income taxes were as follows (in thousands):

United States

Foreign

Total

The components of the provision for income taxes are as follows:

Current:

State

Foreign

Total current tax expense

Deferred:

Federal

State

Foreign

Total deferred tax expense

Total provision for income taxes

Year Ended December 31,

2019

2018

2017

(in thousands)

$

$

(69,930)   $

(84,313)   $

(83,214)

207  

88  

—

(69,723)   $

(84,225)   $

(83,214)

Year Ended December 31,

2019

2018

2017

(in thousands)

$

$

$

$

$

3   $

266  

269   $

(1,652)   $

(311)  

(178)  

(2,141)   $

(1,872)   $

4   $

34  

38   $

—   $

—  

—  

—   $

38   $

—

7

7

—

—

—

—

7

Deferred income taxes reflect the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and
the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets are as follows:

145

 
 
 
 
 
 
 
 
 
 
 
   
   
 
   
   
Deferred tax assets:

Net operating losses carryforwards

Intangible assets

Accruals and reserves

Research and development credits

Stock-based compensation

Lease liabilities

Other

Total deferred tax asset

Deferred tax liabilities:

Property and equipment

Section 481 (a) adjustment

Right-of-use asset

Unrealized gain/loss on investments

Less: valuation allowance

Net deferred tax assets

Year Ended December 31,

2019

2018

(in thousands)

$

$

$

$

90,534   $

14,165  

4,936  

11,031  

3,143  

10,195  

160  

134,164   $

(119)   $

(914)  

(7,363)  

(346)  

(125,245)  

177   $

36,783

17,107

5,127

5,753

1,289

—

210

66,269

(73)

—

—

—

(66,196)

—

The following table presents a reconciliation of the income tax expense computed at the statutory federal rate and the Company’s income tax expense for the
periods presented:

Tax at the statutory federal rate

Other nondeductible items

Stock-based compensation

Research and development credits

Change in valuation allowance

State taxes, net of federal benefits

Change in tax rate due to Tax Act

Other

Year Ended December 31,

2019

2018

2017

$

(14,642)   $

(17,690)   $

(28,293)

(in thousands)

887  

(33,042)  

(5,266)  

59,049  

(8,253)  

—  

(605)  

329  

497  

(1,726)  

22,516  

(4,231)  

—  

343  

38   $

371

3,819

(714)

5,415

(1,868)

21,346

(69)

7

Total provision for (benefit from) income taxes

$

(1,872)   $

The  Company’s  actual  tax  expense  differed  from  the  statutory  federal  income  tax  expense  using  a  tax  rate  of  21%  for  the  year  ended  December  31,  2019
primarily due to state and foreign income taxes, nondeductible expenses, research and development tax credits, the acquisition of Bellwether Bio, and the change
in valuation allowance. The Company’s actual tax expense differed from the statutory federal income tax expense using a tax rate of 21% and 34% for the years
ended December 31, 2018, and 2017, respectively, primarily due to state income taxes, nondeductible expenses, research and development tax credits, and the
change in valuation allowance. The benefit from income taxes for the year ended December 31, 2019 included a release of a valuation allowance of $1.6 million
associated with nondeductible intangible assets recorded as a result of the acquisition of Bellwether Bio. In connection with the acquisition of Bellwether Bio, a
deferred  tax  liability  was  established  for  the  book-tax  basis  differences  related  to  the  non-goodwill  intangible  assets.  The  net  deferred  tax  liability  from  this
acquisition creates an additional source of income to offset the Company’s deferred tax assets. The benefit from income taxes for the year ended December 31,
2019 also included a benefit of $0.4 million associated with the utilization of tax losses from continuing operations against other comprehensive income gains in
accordance with intra-period tax allocation under ASC Topic 740.

146

 
 
 
 
 
   
 
   
 
 
 
 
 
As of December 31, 2019 and 2018, the Company had a net operating loss carryforwards of $365.3 million and $152.3 million for federal purposes, respectively,
and $223.2 million and $73.2 million  for  state  and  local  purposes,  respectively,  which  may  be  subject  to  limitations  as  described  below.  If  not  utilized,  these
carryforwards  will  begin  to  expire  in  2031  for  federal,  and  2020  for  state  and  local  purposes.  Under  the  newly  enacted  federal  income  tax  law,  federal  net
operating losses incurred in 2018 and in future years may be carried forward indefinitely, but the deductibility of such federal net operating losses is limited. It is
uncertain if and to what extent various states will conform to the newly enacted federal income tax law.

As  of  December  31,  2019  and  2018,  the  Company  had  research  and  development  tax  credit  carryforwards  for  federal  tax  purposes  of  $6.8 million  and  $3.5
million, and state research and development tax credit carryforwards of $5.3 million and $2.9 million,  respectively.  The  federal  research  and  development  tax
credit  carryforwards  will  expire  at  various  dates  beginning  in  the  year  2032.  The  Company’s  state  research  and  development  tax  credit  carryforwards  do  not
expire.

Utilization of the net operating loss (“NOL”) carryforwards and credits may be subject to a substantial annual limitation due to the ownership change limitations
provided  by  the  Internal  Revenue  Code  of  1986,  as  amended,  and  similar  state  provisions.  The  annual  limitation  may  result  in  the  expiration  of  NOL
carryforwards and credits before utilization. Current laws impose substantial restrictions on the utilization of NOL carryforwards and credits in the event of an
“ownership change” within a three-year period as defined by the Internal Revenue Code Section 382 (“Section 382”). If there should be an ownership change, the
Company’s ability to utilize its NOL carryforwards and credits could be limited. The Company has not performed a Section 382 analysis.

Realization  of  the  future  tax  benefits  is  dependent  on  the  Company’s  ability  to  generate  sufficient  taxable  income  within  the  carryforward  period.  Due  to  the
Company’s history of U.S. operating losses, the Company believes that the recognition of the deferred tax assets arising from the above-mentioned future tax
benefits is currently not more likely than not to be realized and, accordingly, have provided a full valuation allowance against net U.S. deferred tax assets. The net
change  in  total  valuation  allowance  was  an  increase  of  $59.0  million  and  an  increase  of  $22.5  million  for  the  years  ended  December  31,  2019  and  2018,
respectively.

The SEC staff issued SAB 118 on December 23, 2017 regarding application of the Tax Act. It provides a “measurement period,” lasting through December 22,
2018,  to  allow  registrants  time  to  obtain,  prepare  and  analyze  information  to  complete  the  accounting  required  under  ASC  740,  Income Taxes. The  Company
completed its analysis during the measurement period and there were no measurement period adjustments recognized during 2019.

The  Company  has  not  recorded  a  provision  for  deferred  U.S.  tax  expense  that  could  result  from  the  remittance  of  foreign  undistributed  earnings  since  the
Company intends to reinvest the earnings in its foreign subsidiaries indefinitely.

The  Company  has  made  an  accounting  policy  election  to  treat  Global  Intangible  Low-Taxed  Income  ("GILTI")  taxes  as  a  current  period  expense  rather  than
including these amounts in the measurement of deferred taxes.

Uncertain Tax Positions

The Company records unrecognized tax benefits, where appropriate, for all uncertain income tax positions. The Company recorded unrecognized tax benefits for
uncertain tax positions of $6.5 million and $3.4 million as of December 31, 2019 and 2018, respectively, none of which would impact the Company’s effective
tax rate if recognized, because the benefit would be offset by an increase in the valuation allowance.

A reconciliation of the beginning and ending balance of total unrecognized tax benefits is as follows:

Unrecognized tax benefits - Beginning of period

Increases related to current year’s tax positions

Increases related to prior years’ tax positions

Unrecognized tax benefits - End of period

Year Ended December 31,

2019

2018

2017

$

$

(in thousands)

3,427   $

3,116  

—  

6,543   $

1,712   $

1,635  

80  

3,427   $

884

828

—

1,712

The Company’s policy is to recognize interest and penalties accrued on any unrecognized tax benefits as a component of income tax expense. During the years
ended December 31, 2019 and 2018, the Company recognized no interest and penalties associated with unrecognized tax benefits. There are no tax positions for
which it is reasonably possible that

147

 
 
 
 
 
the total amounts of unrecognized tax benefits will significantly increase or decrease within twelve months of the reporting date.

Due to the net operating loss carryforwards, all years remain open for income tax examination by tax authorities in the United States, various states and foreign
tax jurisdictions in which the Company files tax returns.

17. Employee Benefit Plan

The Company sponsors a 401(k) plan, and pursuant to its terms, eligible employees can elect to contribute to the 401(k) plan, subject to certain limitations, up to
the lesser of the statutory maximum or 100% of eligible compensation on a pre-tax basis. For the year ended December 31, 2019, the Company contributed $0.3
million  to  match  employee  contributions  as  permitted  by  the  plan.  For  the  years  ended  December  31,  2018  and  2017,  the  Company  did  not  elect  to  match
employee contributions as permitted by the plan. The Company pays the administrative costs for the plan.

18. Segment and Geographic Information

The following table sets forth the Company’s revenue by geographic areas based on the customers’ locations:

United States (2)
International(1) (2)

Total revenue

Year Ended December 31,

2019

2018

2017

(in thousands)

$

$

194,312   $

20,063  

214,375   $

77,916   $

12,723  

90,639   $

43,715

6,127

49,842

(1) No single country outside of the United States accounted for more than 10% of total revenue during each of the years ended December 31, 2019, 2018 and 2017.

(2) Fiscal years 2018 and 2017 results do not reflect the impact of the adoption of the new revenue accounting standard in fiscal year 2019.

As of December 31, 2019 and 2018, 97% and 100%, respectively, of the Company’s long-lived assets are located in the United States.

19. Related Party Transactions

As discussed in Note 3, Investment in Joint Venture, and Note 13, Convertible Preferred Stock, in connection with Softbank’s purchase of its Series E convertible
preferred stock in 2017, the Company entered into a joint venture agreement with an entity affiliated with SoftBank. In May 2018, the Company and SoftBank
formed and capitalized the Joint Venture to accelerate commercialization of its products in Asia, the Middle East and Africa, with an initial focus on Japan. The
Company  has  consolidated  the  financial  position,  results  of  operations  and  cash  flows  of  the  Joint  Venture  in  its  financial  statements  and  all  intercompany
balances have been eliminated in consolidation.

As discussed in Note 11, Common Stock, in July and August 2017, the Company repurchased an aggregate of 1,640,901 shares of outstanding common stock
from certain executive officers for $16.9 million. The difference between the repurchase amount and the fair value of repurchased shares of $10.0 million were
recorded as cash-based compensation expense in the accompanying consolidated statements of operations.

For  each  of  the  years  ended  December  31,  2019  and  2017,  the  Company  recognized  revenue  of  $0.5  million  from  an  entity  affiliated  with  a  member  of  the
Company’s Board of Directors, who serves on the board of both the aforementioned entity and the Company. This individual was appointed to the Company’s
board in January 2017. There was no revenue recognized by the Company from that entity for the year ended December 31, 2018.

148

 
 
 
 
 
Table of Contents

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,  or  CEO,  and  chief  financial  officer,  or  CFO,  has  evaluated  the  effectiveness  of  our
disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or Exchange Act), as of
the end of the period covered by this Annual Report on Form 10-K. Based on that evaluation, our CEO and CFO have concluded that as of December 31, 2019,
our disclosure controls and procedures are designed at a reasonable assurance level and are effective to provide reasonable assurance that information we are
required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified
in the rules and forms of the SEC, and that such required information is accumulated and communicated to our management, including our CEO and CFO, as
appropriate, to allow timely decisions regarding required disclosures.

Management report on internal control over financial reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in the Exchange Act
Rules  13a-15(f).  Under  the  supervision  and  with  the  participation  of  our  management,  including  our  CEO  and  CFO,  we  conducted  an  assessment  of  the
effectiveness of our internal control over financial reporting based on the framework in Internal Control Integrated Framework (2013) issued by the Committee of
Sponsoring  Organizations  of  the  Treadway  Commission.  Based  on  the  results  of  our  assessment  under  the  framework  in  the  Internal  Control—Integrated
Framework (2013), our management concluded that our internal control over financial reporting was effective as of December 31, 2019.The effectiveness of our
internal control over financial reporting as of December 31, 2019, has been audited by an independent registered public accounting firm, as stated in their report
included in Part II, Item 8, “Financial Statements” of this Annual Report on Form 10-K.

Changes in internal control

There was no change in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the
Exchange Act that occurred during the period covered by this Annual Report on Form 10-K that has materially affected, or is reasonably likely to materially
affect, our internal control over financial reporting.

Inherent Limitations Over Internal Controls

Our internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with U.S. GAAP.

Our 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 our assets;

(ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with U.S. GAAP, and that
our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and

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

Management, including our CEO and CFO, do not expect that our internal controls will prevent or detect all errors and all fraud. A control system, no matter how
well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control
system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent
limitations in all control systems, no evaluation of internal controls can provide absolute assurance that

149

Table of Contents

all control issues and instances of fraud, if any, have been detected. Also, any evaluation of the effectiveness of controls in future periods are subject to the risk
that those internal controls may become inadequate because of changes in business conditions, or that the degree of compliance with the policies or procedures
may deteriorate.

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Guardant Health, Inc.

Opinion on Internal Control Over Financial Reporting

We have audited Guardant Health, Inc.’s internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control-Integrated Framework
issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Guardant Health, Inc. (the Company)
maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the
Company as of December 31, 2019 and 2018 and consolidated statements of operations, comprehensive loss, redeemable noncontrolling interest and stockholders’ equity and cash
flows for each of the three years in the period ended December 31, 2019, and the related notes and our report dated March 2, 2020 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over
financial reporting included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s
internal control over financial reporting based on our audit. We are a public accounting firm registered with the 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 audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether
effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and
operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our
audit provides a reasonable basis for our opinion.

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 (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the
company; (2) 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
(3) provide reasonable assurance regarding 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.

/s/ Ernst & Young LLP

Redwood City, California

March 2, 2020

Item 9B. Other Information.

We filed a Current Report on Form 8-K with the SEC on December 5, 2019 (the “Original 8-K Report”), which reported, among other things, that on December
2, 2019, Richard Lanman, M.D., notified us of his decision to retire as our Chief Medical Officer, effective as of December 31, 2019. This Item 9B disclosure
intends to provide information called for under Item 5.02(e) of Form 8-K that had not been determined at the time of filing of the Original 8-K Report.

150

Following Dr. Lanman’s retirement, we and Dr. Lanman, on February 28, 2020, entered into a part-time employment agreement for Dr. Lanman to continue with
us as an advisor to facilitate a successful transition (the “Advisor Agreement”). Pursuant to the Advisor Agreement, Dr. Lanman will receive an hourly wage and
will be entitled to a one-time bonus of $100,000 for his services provided to us in 2019 and the continued vesting of his equity awards previously granted by us
during his part-time employment with us. The general terms and conditions of such equity awards are described in our definitive proxy statement filed on April
29, 2019 with the SEC.

This summary of the Advisor Agreement does not purport to be complete and is subject to and qualified in its entirety by reference to the full text of the Advisor
Agreement. The full text of the Advisor Agreement is included as Exhibit 10.21 to this Annual Report on Form 10-K and is incorporated herein by reference.

151

Table of Contents

PART III

Item 10. Directors, Executive Officers and Corporate Governance

The information required by this Item 10 of Form 10-K will be included in our 2020 Proxy Statement to be filed with the SEC in connection with the solicitation
of proxies for our 2020 Annual Meeting of Stockholders and is incorporated herein by reference. The 2020 Proxy Statement will be filed with the SEC within 120
days after the end of the fiscal year to which this Annual Report on Form 10-K relates.

Item 11. Executive Compensation

The information required by this Item 11 of Form 10-K will be included in our 2020 Proxy Statement 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 of Form 10-K will be included in our 2020 Proxy Statement and is incorporated herein by reference.

Item 13. Certain Relationships and Related Transactions, and Director Independence

The information required by this Item 13 of Form 10-K will be included in our 2020 Proxy Statement and is incorporated herein by reference.

Item 14. Principal Accounting Fees and Services

The information required by this Item 14 of Form 10-K will be included in our 2020 Proxy Statement and is incorporated herein by reference.

PART IV

Item 15. Exhibits, Financial Statement Schedules

(a)    Documents filed as part of this report

(1)    All financial statements

See Index to Consolidated Financial Statements in Part II, Item 8 of this Annual Report on Form 10-K.

(2)    Financial Statement Schedules

All  financial  statement  schedules  have  been  omitted  since  the  required  information  was  not  applicable  or  was  not  present  in  amounts  sufficient  to  require
submission of the schedules, or because the information required is included in the consolidated financial statements or the accompanying notes.

(3)    Exhibits required by Item 601 of Regulation S-K

The exhibits listed in the following Index to Exhibits are filed, furnished or incorporated by reference as part of this Annual Report on Form 10-K.

152

Exhibit
Number

3.1

3.2

4.1

10.1

10.2#

10.2(a)#

10.3#

10.3(a)#

10.3(b)#

10.3(c)#

10.4#

10.6#

10.7#

10.8#

10.9

10.10

10.11

10.12§

10.13§

10.14§

10.15§

INDEX TO EXHIBITS

Incorporated by Reference

Exhibit Description

Form  

File No.

Exhibit

Filing Date

  Amended and Restated Certificate of Incorporation

  Amended and Restated Bylaws

  8-K

  8-K

  001-38683

  001-38683

  3.1

  3.2

  10/9/2018

  10/9/2018

Description of Registrant’s Securities Registered under Section 12
of the Exchange Act

Amended and Restated Investors' Rights Agreement, dated May 9,
2017, by and among Guardant Health, Inc. and the investors listed
therein

  Amended and Restated 2012 Stock Plan

Form of Notice of Stock Option Grant and Stock Option
Agreement under the Amended and Restated 2012 Stock Plan

  2018 Incentive Award Plan

  S-1

  S-1

  S-1

  S-8

  333-227206

  333-227206

  10.1

  10.3

  9/6/2018

  9/6/2018

  333-227206

  333-227762

  10.4

  9/6/2018

  99.2(a)

  10/10/2018

Filed/Furnished
Herewith

  *

Form of Stock Option Agreement under the 2018 Incentive Award
Plan

Form of Restricted Stock Award Agreement under the 2018
Incentive Award Plan

Form of Restricted Stock Unit Award Agreement under the 2018
Incentive Award Plan

  2018 Employee Stock Purchase Plan

10.4(a)#

  First Amendment to 2018 Employee Stock Purchase Plan

10.5#

  Executive Severance Plan

10.5(a)#

  First Amendment to Executive Severance Plan

  Non-Employee Director Compensation Program

Amended and Restated Offer Letter Agreement, dated September
16, 2018, by and between Guardant Health, Inc. and Ian Clark

Amended and Restated Offer Letter Agreement, dated September
16, 2018, by and between Guardant Health, Inc. and Stanley
Meresman

Form of Indemnification Agreement between Guardant Health, Inc.
and its directors and officers

Lease, dated November 1, 2014, by and between the Registrant and
Metropolitan Life Insurance Company

  S-1/A

  333-227206

  10.9(a)

  9/21/2018

  S-1/A

  333-227206

  10.9(b)

  9/21/2018

  S-1/A

  333-227206

  10.9(c)

  9/21/2018

  S-8

  10-K

  S-1/A

  10-K

  10-Q

  333-227762

  99.3

  10/10/2018

  001-38683

  10.4(a)

  3/29/2019

  333-227206

  10.13

  9/21/2018

  001-38683

  001-38683

  10.5(a)

  3/29/2019

  10.3

  5/10/2019

  10-Q

  001-38683

  10.9

  11/19/2018

  10-Q

  001-38683

  10.10

  11/19/2018

  S-1/A

  333-227206

  10.8

  9/18/2018

  S-1

  333-227206

  10.2

  9/6/2018

First Amendment to Lease, dated October 17, 2017, by and
between the Registrant and Metropolitan Life Insurance Company   S-1

  333-227206

  10.2(a)

  9/6/2018

Joint Venture Agreement, dated May 9, 2017, by and between the
Registrant and SoftBank Vision Fund (AIV M1) L.P., as assignee
from SoftBank Group Capital Limited

Supply Agreement, dated September 15, 2014, by and between the
Registrant and Illumina, Inc.

Amendment to Supply Agreement, dated August 11, 2015, by and
between the Registrant and Illumina, Inc.

Amendment #2 to Supply Agreement, dated December 24, 2016,
by and between the Registrant and Illumina, Inc.

  S-1

  333-227206

  10.5

  9/6/2018

  S-1

  333-227206

  10.7

  9/6/2018

  S-1

  333-227206

  10.7(a)

  9/6/2018

  S-1

  333-227206

  10.7(b)

  9/6/2018

153

 
   
 
   
 
 
 
 
 
   
   
 
   
   
   
   
 
   
   
 
   
   
 
   
 
   
 
   
   
 
   
   
   
 
   
 
   
 
   
 
   
 
   
 
   
 
   
 
   
 
   
10.16§

10.17§

10.18#

10.19#

10.20#+

10.21#+

21.1

23.1

24.1

31.1

31.2

32.1

32.2

101.INS

Amendment #3 to Supply Agreement, dated August 14, 2017, by
and between the Registrant and Illumina, Inc.

Amendment #4 to Supply Agreement, dated June 26, 2018, by and
between the Registrant and Illumina, Inc.

Form of letter agreement relating to certain time-based equity
awards held by Helmy Eltoukhy and AmirAli Talasaz

Offer Letter, dated July 29, 2014, by and between Guardant Health,
Inc. and Richard Lanman

Offer Letter, dated May 13, 2018, by and between Guardant Health,
Inc. and Leena Das-Young

Advisor Agreement, dated February 28, 2020, by and between
Guardant Health, Inc. and Richard Lanman

  S-1

  333-227206

  10.7(c)

  9/6/2018

  S-1

  333-227206

  10.7(d)

  9/6/2018

  10-K

  001-38683

  10.19

  3/29/2019

  10-Q

  001-38683

  10.6

  5/10/2019

  10-Q

  001-38683

  10.5

  5/10/2019

  List of Subsidiaries

  Consent of Independent Registered Public Accounting Firm

Power of Attorney (included on the signatures page of this Annual
Report on Form 10-K)

Certification of the Chief 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 the Chief 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 the Chief 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 the Chief Financial Officer pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-
Oxley Act of 2002

Inline XBRL Instance Document - the instance document does not
appear in the Interactive Data File because its XBRL tags are
embedded within the Inline XBRL document

101.SCH

  Inline XBRL Taxonomy Extension Schema Document

101.CAL

101.DEF

101.LAB

101.PRE

Inline XBRL Taxonomy Extension Calculation Linkbase
Document

  Inline XBRL Taxonomy Extension Definition Linkbase Document

  Inline XBRL Taxonomy Extension Label Linkbase Document

Inline XBRL Taxonomy Extension Presentation Linkbase
Document

Cover Page Interactive Data File (formatted as inline XBRL with
applicable taxonomy extension information contained in Exhibits
104
101)
___________________________
Filed herewith.
*
Furnished herewith.
**
Indicates management contract or compensatory plan.
#

154

*

  *

  *

  *

  *

  *

  **

  **

  *

  *

  *

  *

  *

  *

  *

 
   
 
   
 
   
 
   
 
   
 
   
   
   
   
 
   
   
   
   
   
   
   
   
 
   
   
   
   
 
   
   
   
 
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
   
   
   
   
 
   
   
   
   
   
   
   
   
   
   
   
   
 
   
   
   
   
 
   
   
   
   
§

Portions  of  this  exhibit  (indicated  by  asterisks)  have  been  omitted  pursuant  to,  a  request  for  confidential  treatment  pursuant  to  Rule  24b-2  under  the
Securities Exchange Act of 1934, as amended, or Item 601(a)(5) of Regulation S-K.

+ Schedules and attachments to this exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K.

Item 16. Form 10-K Summary

None.

155

Table of Contents

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by
the undersigned, thereunto duly authorized.

Dated:

March 2, 2020

GUARDANT HEALTH, INC.

By:

Name:

Title:

/s/ Helmy Eltoukhy

Helmy Eltoukhy

Chief Executive Officer

Power of Attorney

KNOW  ALL  PERSONS  BY  THESE  PRESENTS,  that  each  person  whose  signature  appears  below  constitutes  and  appoints  Helmy  Eltoukhy,  his  or  her
attorneys-in-fact, each with the power of substitution, for him or her in any and all capacities, to sign any amendments to this Annual Report on Form 10-K, and
to  file  the  same,  with  exhibits  thereto  and  other  documents  in  connection  therewith,  with  the  Securities  and  Exchange  Commission,  hereby  ratifying  and
confirming all that each of said attorneys-in-fact, or his substitute or substitutes, may do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and
in the capacities and on the dates indicated:

Signature

  Title

Chief Executive Officer and Director
(Principal Executive Officer)

  Date

March 2, 2020

/s/ Helmy Eltoukhy

Helmy Eltoukhy

/s/ Derek Bertocci

Derek Bertocci

/s/ AmirAli Talasaz

AmirAli Talasaz

/s/ Ian Clark

Ian Clark

/s/ Bahija Jallal

Bahija Jallal

/s/ Samir Kaul

Samir Kaul

/s/ Stanley Meresman

Stanley Meresman

/s/ Dipchand Nishar

Dipchand Nishar

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

March 2, 2020

  President, Chief Operating Officer and Chairman of the Board of Directors

  March 2, 2020

  Director

  Director

  Director

  Director

  Director

156

  March 2, 2020

  March 2, 2020

  March 2, 2020

  March 2, 2020

  March 2, 2020

 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
   
   
 
 
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
Description of the Registrant’s Securities Registered
Pursuant to Section 12 of the Securities Exchange Act of 1934

Exhibit 4.1

Except as otherwise indicated herein or as the context otherwise requires, references in this exhibit to “we,” “us,” “our” and “our company” refer to Guardant
Health, Inc. The following description of our common stock and certain provisions of our amended and restated certificate of incorporation and amended and
restated  bylaws  are  summaries  and  are  qualified  in  their  entirety  by  reference  to  the  full  text  of  our  amended  and  restated  certificate  of  incorporation  and
amended and restated bylaws. We urge you to read those documents, each of which are incorporated by reference as exhibits to our filings with the Securities and
Exchange Commission, for additional information.

General

Our common stock is registered under Section 12 of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Our amended and restated certificate
of incorporation authorizes 350,000,000 shares of common stock, all with a par value of $0.00001 per share. Holders of our common stock are entitled to one
vote for each share held on all matters submitted to a vote of stockholders and do not have cumulative voting rights. The election of directors by holders of our
common stock is determined by a plurality of the votes cast by the stockholders entitled to vote on the election, subject to any preferential voting rights of any
series of preferred stock that we may designate and issue in the future. Holders of our common stock are entitled to receive proportionately any dividends as may
be declared by our board of directors, subject to any preferential dividend rights of any series of preferred stock that we may designate and issue in the future.

In the event of our liquidation or dissolution, the holders of our common stock are entitled to receive proportionately our net assets available for distribution to
stockholders after the payment of all debts and other liabilities and subject to the prior rights of any outstanding preferred stock. Holders of our common stock
have no preemptive, subscription, redemption or conversion rights. Outstanding shares of our common stock are, when issued and paid for, validly issued, fully
paid and nonassessable. The rights, preferences and privileges of holders of our common stock are subject to and may be adversely affected by the rights of the
holders of shares of any series of preferred stock that we may designate and issue in the future.

Anti-takeover Provisions

Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws

Because  our  stockholders  do  not  have  cumulative  voting  rights,  our  stockholders  holding  a  majority  of  the  voting  power  of  our  shares  of  common  stock
outstanding  will  be  able  to  elect  all  of  our  directors.  Our  amended  and  restated  certificate  of  incorporation  and  amended  and  restated  bylaws  provide  that  all
stockholder actions must be effected at a duly called meeting of stockholders and not by consent in writing. A special meeting of stockholders may be called only
by a majority of our board of directors, the chair of our board of directors or our chief executive officer.

Our amended and restated certificate of incorporation further provides that the affirmative vote of holders of at least sixty-six and two-thirds percent (66-2/3%) of
the voting power of all of the then outstanding shares of voting stock, voting as a single class, is required to amend certain provisions of our amended and restated
certificate  of  incorporation,  including  provisions  relating  to  the  size  of  the  board,  removal  of  directors,  special  meetings,  actions  by  written  consent  and
cumulative voting. The affirmative vote of holders of at least sixty-six and two-thirds percent (66-2/3%) of the voting power of all of the then outstanding shares
of voting stock, voting as a single class, is required to amend or repeal our amended and restated bylaws, although our amended and restated bylaws may be
amended by a simple majority vote of our board of directors.

Our amended and restated certificate of incorporation further provides that our board of directors is divided into three classes, Class I, Class II and Class III, with
each class serving staggered terms.

Finally, our amended and restated certificate of incorporation provides that, unless we consent in writing to the selection of an alternative forum, to the fullest
extent permitted by law, the Court of Chancery of the State of Delaware is the sole and exclusive forum for: (i) any derivative action or proceeding brought on
behalf  of  us;  (ii)  any  action  asserting  a  claim  of  breach  of  a  fiduciary  duty  owed  by  any  of  our  directors,  officers  or  other  employees  or  agents  to  us  or  our
stockholders; (iii) any action asserting a claim against us arising pursuant to any provision of the Delaware General Corporation Law or our amended and restated
certificate of incorporation or amended and restated bylaws; or (iv) any action asserting a claim against us governed by the internal affairs doctrine; provided that,
the exclusive forum provision will not apply to suits brought to enforce any liability or duty created by the Exchange Act, or any other claim for which the federal
courts have exclusive jurisdiction; and provided further that, if and only if the Court of Chancery of the State of Delaware dismisses any such action for lack of
subject matter jurisdiction, such action may be brought in another state or federal court sitting in the State of Delaware. Our amended and restated certificate of
incorporation  also  provides  that  the  federal  district  courts  of  the  United  States  of  America  will  be  the  exclusive  forum  for  the  resolution  of  any  complaint
asserting  a  cause  of  action  against  us  or  any  of  our  directors,  officers,  employees  or  agents  and  arising  under  the  Securities  Act  of  1933,  as  amended,  or  the
Securities Act. However, a Delaware court recently held that such an exclusive forum provision relating to federal courts was unenforceable under Delaware law,
and unless and until the Delaware court decision is reversed on appeal or otherwise abrogated, we do not intend to enforce such a provision in the event of a
complaint asserting a cause of action arising under the Securities Act against us or any of our directors, officers, employees or agents.

The foregoing provisions may make it more difficult for our existing stockholders to replace our board of directors as well as for another party to obtain control of
our company by replacing our board of directors. Since our board of directors has the power to retain and discharge our officers, these provisions may also make
it more difficult for existing stockholders or another party to effect a change in management. In addition, the authorization of undesignated preferred stock makes
it possible for our board of directors to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to change the
control of our company.

These  provisions  are  intended  to  enhance  the  likelihood  of  continued  stability  in  the  composition  of  our  board  of  directors  and  its  policies  and  to  discourage
certain types of transactions that may involve an actual or threatened acquisition of our company. These provisions are also designed to reduce our vulnerability
to  an  unsolicited  acquisition  proposal  and  to  discourage  certain  tactics  that  may  be  used  in  proxy  rights.  However,  these  provisions  may  have  the  effect  of
discouraging  others  from  making  tender  offers  for  our  shares  and  may  have  the  effect  of  deterring  hostile  takeovers  or  delaying  changes  in  control  of  our
company or our management. As a consequence, these provisions also may inhibit fluctuations in the market price of our stock that could result from actual or
rumored takeover attempts.

Section 203 of the Delaware General Corporation Law

We are subject to Section 203 of the Delaware General Corporation Law, which prohibits a Delaware corporation from engaging in any business combination
with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

•

before  such  date,  the  board  of  directors  of  the  corporation  approved  either  the  business  combination  or  the  transaction  that  resulted  in  the  stockholder
becoming an interested stockholder;

In general, Section 203 defines business combination to include the following:

•

•

upon closing of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least eight-five
percent (85%) of the voting stock of the corporation outstanding at the time the transaction began, excluding for purposes of determining the voting stock
outstanding  (but  not  the  outstanding  voting  stock  owned  by  the  interested  stockholder)  those  shares  owned  by  (i)  persons  who  are  directors  and  also
officers and (ii) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the
plan will be tendered in a tender or exchange offer; or

on or after such date, the business combination is approved by the board of directors and authorized at an annual or special meeting of the stockholders,
and not by written consent, by the affirmative vote of at least sixty-six and two-thirds percent (66 2/3%) of the outstanding voting stock that is not owned
by the interested stockholder.

any merger or consolidation involving the corporation and the interested stockholder;

•
In general, Section 203 defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or
within three years prior to the time of determination of interested stockholder status did own, fifteen percent (15%) or more of the outstanding voting stock of the
corporation.

•

•

•

•

any sale, transfer, pledge or other disposition of ten percent (10%) or more of the assets of the corporation involving the interested stockholder;

subject to certain exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested
stockholder;

any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series of the corporation
beneficially owned by the interested stockholder; or

the receipt by the interested stockholder of the benefit of any loss, advances, guarantees, pledges or other financial benefits by or through the corporation.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ex 10.21

GUARDANT HEALTH 505 Penobscot Drive, Redwood City, CA 94063 USA / 855.698.8887 client services / www.guardanthealth.com

December 31, 2019

CONFIDENTIAL

Dr. Richard Lanman
556 Van Buren St.
Los Altos, CA 94022

Re:Employment as Advisor

Dear Rick:

This letter will provide details regarding your employment as a part-time Advisor for Guardant Health, Inc. (the “Company”). This letter
constitutes the entire agreement between you and the Company with respect to the subject matter hereof and supersedes and replaces any and all
prior agreements or representations relating to such subject matter including, but not limited to, your July 29, 2014 offer of employment with the
Company which will become null and void upon your agreement to this letter.

The details of your employment as an Advisor are as follows:

Start Date as Advisor: You will begin serving as an Advisor, effective January 3, 2020. Although it is anticipated that your position as
Advisor will last until December 31, 2020 (the “End Date”), you will remain an at-will employee during the entire term of your employment, as
described below.

Compensation: The  majority  of  your  compensation  for  your  services  as  an  Advisor  will  be  related  to  your  continued  vesting  of  your
outstanding  equity  awards  (see  Stock  Options/RSUs  below).  Nevertheless,  the  Company  will  pay  you  an  hourly  rate  of  $22.00  per  hour  for
compliance reasons. Your position is classified as non-exempt, meaning you are eligible for overtime pay. You will be paid overtime as required by
state and federal law. As required by California law, I’ve provided detailed information about the terms of your wages in the enclosed Notice to
Employee (Labor Code section 2810.5). Please also sign and return one copy of the notice with this signed letter.

Sick Leave/Paid Time Off: As a part-time employee regularly scheduled to work fewer than 30 hours per week, you are not eligible to
accrue vacation or to receive paid holidays. As a part-time employee you will accrue sick time at one hour for every 30 hours worked. You may
only use accrued sick leave beginning on the 90th day of employment.

Stock Options/RSUs: The parties acknowledge that your seamless transition from Global Chief Medical Officer to part-time Advisor does
not constitute a break in service for purposes of your outstanding stock options and restricted stock unit awards (together, the “Equity Awards”). In
addition,  the  vesting  schedule  of  your  Equity  Awards  will  continue  in  accordance  with  the  same  vesting  schedule  applicable  while  you  were
employed as Global Chief Medical Officer, and you will continue to vest in such awards so long as you continue to provide services as an Advisor
to the Company.

Bonus: Despite your transition from Global Chief Medical Officer, the Company will pay you a one-time bonus of $100,000 to recognize

your efforts during 2019. You will not be eligible for any other incentive compensation for past services or services under this Agreement.

1

Benefits: In your role as Advisor, you are not eligible for any Company benefits (including any severance benefits that you may have had
available to you when you were previously an executive of the Company), except as otherwise described in this letter and as otherwise required by
state, federal, or local law. As a result of your transition from Company executive to Advisor, the Company will reimburse your COBRA premiums
during the term of your continued employment as an Advisor.

Expense Reimbursement: You must obtain prior approval from AmirAli Talasaz for any business-related travel, with any arrangements

relating to transportation, lodging and meals to be mutually agreed between the parties in advance.

At-Will Employment: Consistent with state law, your employment with the Company will be “at-will.” This means that your employment
with the Company will not last for any specific period of time, and either you or the Company can terminate your employment with 60 days’ notice
and for any reason or for no reason. This letter will reflect the final, total and complete agreement between you and the Company regarding how
your employment may be terminated. The “at-will” nature of your employment may only be changed if the CEO of the Company signs a written
contract which explicitly changes at-will status.

Offer Acceptance: In order to accept this agreement, you must sign this letter and the other document enclosed for your signature, and I
must receive them back before close of business on February 28, 2020. This letter, once accepted, constitutes the entire agreement between you and
Guardant Health, Inc. with respect to the subject matter hereof and supersedes and replaces any and all prior agreements or representations relating
to such subject matter including, but not limited to, your July 29, 2014 offer of employment. If you have any questions about this letter, then before
signing please contact me.

Sincerely,

/s/ Amelia Merrill____
Amelia Merrill
VP, People
Guardant Health, Inc.

I, Dr. Richard Lanman, have read this letter and understand and agree to its terms.

Date: February 28, 2020 Dr. Richard Lanman

Signature: /s/ Richard Lanman____

 
Subsidiaries of Guardant Health, Inc.

Name

Guardant Health AMEA, Inc.

Guardant Health Pte. Ltd.

Guardant Health Japan Corp.

Exhibit 21.1

Jurisdiction of Incorporation

Delaware

Singapore

Japan

Guardant Holdings (Switzerland) GmbH

                                                                        Switzerland

Bellwether Bio, Inc.

Washington

Consent of Independent Registered Public Accounting Firm

Exhibit 23.1

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-227762) of Guardant Health, Inc. of our reports dated March 2,
2020, with respect to the consolidated financial statements of Guardant Health, Inc. and the effectiveness of internal control over financial reporting of Guardant
Health Inc., included in this Annual Report (Form 10-K) for the year ended December 31, 2019.

/s/ Ernst & Young LLP

Redwood City, California

March 2, 2020

CERTIFICATION OF THE PRINCIPAL EXECUTIVE OFFICER
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 31.1

I, Helmy Eltoukhy, certify that:

1.

I have reviewed this Annual Report on Form 10-K of Guardant Health, Inc.;

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(s)  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(s) 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:

March 2, 2020

/s/ Helmy Eltoukhy

Helmy Eltoukhy

Chief Executive Officer

(Principal Executive Officer)

 
 
 
CERTIFICATION OF THE PRINCIPAL FINANCIAL OFFICER
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 31.2

I, Derek Bertocci, certify that:

1.

I have reviewed this Annual Report on Form 10-K of Guardant Health, Inc.;

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(s)  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(s) 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:

March 2, 2020

/s/ Derek Bertocci

Derek Bertocci

Chief Financial Officer

(Principal Financial 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  of  Guardant  Health,  Inc.  (the  “Company”)  on  Form  10-K  for  the  period  ended  December  31,  2019  as  filed  with  the
Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-
Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date:

March 2, 2020

/s/ Helmy Eltoukhy

Helmy Eltoukhy

Chief Executive Officer

(Principal Executive Officer)

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section 18 of
the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the
date hereof, regardless of any general incorporation language in such filing.

 
 
 
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  of  Guardant  Health,  Inc.  (the  “Company”)  on  Form  10-K  for  the  period  ended  December  31,  2019  as  filed  with  the
Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-
Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date:

March 2, 2020

/s/ Derek Bertocci

Derek Bertocci

Chief Financial Officer

(Principal Financial Officer)

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section 18 of
the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the
date hereof, regardless of any general incorporation language in such filing.