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G1 Therapeutics

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FY2017 Annual Report · G1 Therapeutics
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

(Mark One)
☒

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

For the fiscal year ended December 31, 2017

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 001-38096

G1 THERAPEUTICS, INC.

(Exact name of Registrant as specified in its Charter)

Delaware
( State or other jurisdiction of
incorporation or organization)

79 T.W. Alexander Drive
4501 Research Commons, Suite 100
Research Triangle Park, NC
(Address of principal executive offices)

26-3648180
(I.R.S. Employer
Identification No.)

27709
(Zip Code)

Registrant’s telephone number, including area code: (919) 213-9835

Securities registered pursuant to Section 12(b) of the Act: Common Stock, Par Value $.0001 Per Share; Common stock traded on The Nasdaq Stock 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 15(d) of the Act. YES ☐ NO ☒
Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months
(or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES ☒ NO ☐
Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted
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 and post such
files). YES ☒ NO ☐
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405) is not contained herein, and will not be contained, to the best of Registrant’s
knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☒
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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

  ☒  (Do not check if a smaller reporting 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, based on the closing price of the shares of common stock on The
Nasdaq Stock Market on June 30, 2017, was $294,068,519.
The number of shares of Registrant’s Common Stock outstanding as of February 16, 2018 was 28,444,863.

Documents Incorporated by Reference
Portions of the Registrant’s Definitive Proxy Statement relating to the Annual Meeting of Stockholders, scheduled to be held on June 7, 2018, are incorporated by reference into Part III
of this report.

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

PART II
Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.

PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV
Item 15.
Item 16.

Table of Contents

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

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

  Directors, Executive Officers and Corporate Governance
  Executive Compensation
  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
  Certain Relationships and Related Transactions, and Director Independence
  Principal Accounting Fees and Services

  Exhibits, Financial Statement Schedules
  Form 10-K Summary

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Special note regarding forward-looking statements

This Annual Report on Form 10-K (this “Annual Report”) contains forward-looking statements that involve risks and uncertainties. All statements other than
statements of historical facts contained in this Annual Report are forward-looking statements. In some cases, you can identify forward-looking statements by
words such as “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,”
“seek,” “should,” “target,” “will,” “would,” or the negative of these words or other comparable terminology.

These forward-looking statements are subject to a number of risks, uncertainties and assumptions, including those described in the “Risk Factors” section and
elsewhere in this Annual Report. Moreover, we operate in a very competitive and rapidly changing environment, and new risks emerge from time to time. It is
not  possible  for  our  management  to  predict  all  risks,  nor  can  we  assess  the  impact  of  all  factors  on  our  business  or  the  extent  to  which  any  factor,  or
combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these
risks, uncertainties and assumptions, the forward-looking events and circumstances discussed in this Annual Report may not occur and actual results could
differ materially and adversely from those anticipated or implied in the forward-looking statements.

You  should  not  rely  upon  forward-looking  statements  as  predictions  of  future  events.  Although  we  believe  that  the  expectations  reflected  in  the  forward-
looking statements are reasonable, we cannot guarantee that the future results, levels of activity, performance or events and circumstances reflected in the
forward-looking statements will be achieved or occur. Such forward looking statements speak only as of the date of this Annual Report.  Except as may be
required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements.

You should read this Annual Report and the documents that we have filed as exhibits to this Annual Report with the understanding that our actual future
results, levels of activity, performance, and events and circumstances may be materially different from what we expect.

This  Annual  Report  includes  statistical  and  other  industry  and  market  data  that  we  obtained  from  industry  publications  and  research,  surveys  and  studies
conducted by third parties. Industry publications and third-party research, surveys and studies generally indicate that their information has been obtained from
sources believed to be reliable, although they do not guarantee the accuracy or completeness of such information.

1

 
PART I

Item 1. Business.

Overview

We are a clinical-stage biopharmaceutical company focused on the discovery, development and commercialization of novel small molecule therapeutics for
the treatment of patients with cancer. Our product portfolio is built on a drug discovery platform that targets key cellular pathways with proprietary medicinal
chemistry. Our therapies are designed to enable more effective combination treatment strategies and improve outcomes for patients across multiple oncology
indications.

We were incorporated under the laws of the State of Delaware in May 2008 under the name “G-Zero Therapeutics, Inc.” In September 2012, we changed our
name  to  “G1  Therapeutics,  Inc.”  Our  principal  executive  offices  are  located  at  79  T.W.  Alexander  Drive,  4501  Research  Commons,  Suite  100,  Research
Triangle Park, NC 27709, and our telephone number is (919) 213-9835. 

We manage our operations as a single segment for the purposes of assessing performance and making operating decisions. All of our assets are held in the
United States.

“G1 Therapeutics” and our logo are our trademarks. All other service marks, trademarks and trade names appearing in this Annual Report are the property of
their respective owners. We do not intend our use or display of other companies’ trade names, trademarks or service marks to imply a relationship with, or
endorsement or sponsorship of us by, these other companies.

Product Pipeline

Our product pipeline includes several product candidates with the potential to significantly improve the treatment of patients with cancer.  Our two clinical
candidates,  trilaciclib  and  G1T38,  are  based  on  our  core  understanding  of  cyclin-dependent  kinases  4  and  6,  or  CDK4/6,  a  pair  of  proteins  that  play  an
important role in the growth and proliferation of all human cells.  G1T48 is a potential first-in-class oral Selective Estrogen Receptor Degrader, or SERD,
which we plan to develop as a single agent and in combination with other agents, including G1T38 for the treatment of ER-positive, or ER+, HER2- breast
cancer.  We own the global rights to all our product candidates.

G1 Therapeutics Product Pipeline

Candidate

  Target

   MOA

Clinical Status

Global Rights

trilaciclib

CDK4/6

Short-acting IV CDK4/6 inhibitor
Preserves HSPCs, enhances immune system function

  Phase 2

G1T38

CDK4/6

  Oral CDK4/6 inhibitor

Stops tumor proliferation and growth

G1T48

Estrogen Receptor

Oral Selective Estrogen Receptor Degrader (SERD)
Inhibits estrogen receptor driven tumor proliferation

  Phase 1/2

  Open IND

Our CDK4/6 Inhibitor Product Candidates

CDK4 and CDK6, collectively known as CDK4/6, are key cell signaling proteins that regulate cell growth and proliferation.  The CDK4/6 pathway is critical
for  cell  cycle  regulation  of  both  healthy  normal  cells  and  certain  tumor  cells,  representing  a  validated  and  promising  class  of  targets  for  anti-cancer
therapeutics. An example of normal cells whose growth and proliferation are regulated by CDK4/6, are hematopoietic stem and progenitor cells, or HSPCs.
HSPCs reside in the bone marrow and are the “reservoir” from which all blood and immune system cells are formed. Additionally, CDK4/6 plays an integral
role in the growth and proliferation of certain types of tumors.

We have leveraged our deep knowledge in CDK4/6 biology to discover and develop two highly potent and selective CDK4/6 inhibitors that may have broad
applicability  across  multiple  cancer  indications.    We  believe  we  are  the  only  company  with  two  distinct  clinical-stage  CDK4/6  inhibitors,  trilaciclib  and
G1T38, each of which has the potential to be the backbone therapy of multiple combination regimens.  Our two CDK4/6 inhibitors were rationally designed
to treat distinct patient populations with different combination regimens.

Trilaciclib, a short-acting IV therapy, is in development for combinations with chemotherapy and chemotherapy/checkpoint inhibitor regimens. G1T38, an
oral therapy, is in development for combinations with other oral targeted therapies.

2

 
 
   
   
  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
Trilaciclib: our novel approach to preserve HSPCs from damage by chemotherapy

Trilaciclib  is  a  potential  first-in-class,  short-acting  CDK4/6  inhibitor  which  we  are  developing  to  be  administered  intravenously  prior  to  chemotherapy.  In
preclinical studies, administration of trilaciclib prior to chemotherapy has been shown to induce transient cell-cycle arrest of HSPCs, protect HSPCs from
chemotherapy-induced  damage,  preserve  bone  marrow  and  immune  system  function,  protect  against  bone  marrow  exhaustion,  improve  complete  blood
counts (CBC) recovery, prevent myeloid skewing and consequent lymphopenia, and enhance T-cell effector function in the tumor microenvironment.

Following evaluation of trilaciclib in a Phase 1 trial in healthy volunteers, we initiated two Phase 1b/2a trials in patients with extensive-stage small cell lung
cancer  (SCLC);  one  in  a  first-line  setting  (in  combination  with  carboplatin/etoposide)  and  the  other  in  a  second-/third  line  setting  (in  combination  with
topotecan). Enrollment in the open label Phase 1b portions of both trials has been completed and preliminary data were reported in 2016 and 2017; response
rates and tolerability compared favorably to historical chemotherapy-only trials. In the Phase 1b parts of these two trials, we treated 51 patients with over 250
cycles of trilaciclib and chemotherapy, and did not have a single episode of febrile neutropenia – one of the most common adverse consequences of these
chemotherapy regimens. Further, there were no drug-related serious adverse events reported during the Phase 1b parts of these two trials. There were some
adverse events reported involving fatigue and cytopenias, but those adverse events were less severe and less frequent than those generally reported in trials
involving the use of chemotherapy alone.

Based on these encouraging preliminary data, we advanced both of these SCLC trials into the randomized, placebo-controlled, double-blind Phase 2a parts.
Enrollment in the first-line SCLC Phase 2a trial was completed in the second quarter of 2017 and unblinded preliminary data will be reported in March 2018;
at  that  time,  we  will  also  update  data  from  the  Phase  1b  patients  of  the  trial.  Enrollment  in  the  second-/third-line  SCLC  Phase  2a  trial  is  expected  to  be
completed in the second quarter of 2018, with unblinded preliminary data (as well as updated Phase 1b data) reported in the fourth quarter of 2018. In 2017
we  initiated  a  randomized  Phase  2  trial  of  trilaciclib  in  patients  with  first-/second-/third-line  metastatic  triple-negative  breast  cancer  (mTNBC)  receiving
gemcitabine and carboplatin.  Enrollment is expected to be completed in the second quarter of 2018, with preliminary data reported in the fourth quarter of
2018.  Finally, as part of our non-exclusive collaboration with Genentech, in 2017 we initiated a randomized, placebo-controlled, double-blind Phase 2 trial of
trilaciclib in combination with Tecentriq® (atezolizumab)/carboplatin/etoposide in first-line SCLC patients. We completed enrollment in February 2018; as
the primary endpoint of this trial is overall-survival, data read-out is event driven, and is not expected until 2019 or later.

Market opportunities for trilaciclib

Cancer is the second leading cause of death in the United States with approximately 1.7 million new cases and 600,000 deaths in 2016. Chemotherapy is still
the standard of care treatment for multiple cancers. We estimate that more than one million patients in the United States receive chemotherapy annually.

Chemotherapy  has  significant  clinical  utility  and  continues  to  be  the  most  effective  treatment  for  many  cancers.  However,  it  also  damages  HSPCs
(myelosuppression) and the immune system (immunosuppression), leading to severe adverse effects and limiting anti-tumor activity.  Chemotherapy-induced
myelosuppression causes abnormally low numbers of red blood cells, or anemia, abnormally low numbers of neutrophils, or neutropenia, and/or abnormally
low numbers of platelets, or thrombocytopenia. The treatment and prevention of myelosuppressive side effects of chemotherapy is a large market opportunity.
The only current treatment for chemotherapy-induced myelosuppression is growth factor support. Two main types of commercially available growth factors
are: granulocyte-colony stimulating factor, or GCSF, and erythropoiesis stimulating agents, or ESAs. GCSF increases production of neutrophils in patients to
reduce  the  incidence  of  infection  after  chemotherapy.  GCSF  does  not  preserve  the  function  of  the  bone  marrow  and  immune  system  from  chemotherapy
damage.  ESAs  increase  production  of  red  blood  cells  in  patients.  Accordingly,  ESAs  also  do  not  preserve  the  function  of  the  bone  marrow  and  immune
system from chemotherapy. ESA use in oncology has diminished recently due to a “black box” warning related to death and serious cardiovascular events.
Despite these limitations, we estimate that annual worldwide sales of growth factor support therapy in oncology exceeds $7 billion.

Our  first  trial  for  trilaciclib  is  in  first-line  treatment  of  extensive-stage  Small  Cell  Lung  Cancer,  or  SCLC.  SCLC  is  inherently  CDK4/6-independent  and
accounts for approximately 15% of all lung cancers. Approximately 31,000 people are diagnosed annually with SCLC in the United States and approximately
70%, or 21,000, of those have extensive-stage disease. First-line treatment for extensive-stage SCLC is typically a chemotherapy regimen of carboplatin and
etoposide,  each  of  which  has  significant  myelosuppressive  side  effects.  While  these  patients  often  respond  to  chemotherapy,  approximately  90%  progress
within one year and die within two years. Five-year survival rates are less than 5% for patients with extensive-stage SCLC. The last drug approved for the
treatment of patients with SCLC was topotecan in 2007, which was approved in a second/third line setting and is highly myelosuppressive.

We are also exploring the use of trilaciclib in Triple Negative Breast Cancer, or TNBC. According to the World Cancer Research Fund International, breast
cancer  is  the  second  most  common  cancer  in  the  world  and  the  most  prevalent  cancer  in  women,  with  an  estimated  1.7  million  cases  of  breast  cancer
diagnosed annually worldwide. TNBC makes up approximately 15-20% of such diagnosed breast cancers. Because TNBC cells lack key growth-signaling
receptors, patients do not respond well to medications that

3

block estrogen, progesterone, or HER2 receptors. Instead, treating TNBC typically involves chemotherapy, radiation, and surgery. In general, survival rates
tend to be lower with TNBC compared to other forms of breast cancer, and TNBC is also more likely than some other types of breast cancer to return after it
has been treated, especially in the first few years after treatment.

There  are  currently  approximately  300  trials  of  which  we  are  aware  evaluating  checkpoint  inhibitors  in  combination  with  chemotherapy.  We  believe  that
administering trilaciclib with chemotherapy/checkpoint inhibitor combinations may increase efficacy. We are collaborating non-exclusively with Genentech
to explore the utility of trilaciclib and their checkpoint inhibitor Tecentriq combined with chemotherapy. Our first targeted indication is first-line SCLC and
we initiated a Phase 2 trial in combination with Tecentriq in the second quarter of 2017. We also anticipate trials in other indications.

Advantages of trilaciclib

We believe that treating patients with trilaciclib prior to the administration of chemotherapy may have the following benefits and advantages:

•

•

•

•

•

•

•

Potential to minimize chemotherapy-induced myelotoxicity and immunosuppression. Trilaciclib has been rationally designed and optimized to
preserve HSPCs from damage by chemotherapy, thereby minimizing cytopenias across all four blood lineages: red cells, platelets, neutrophils
and lymphocytes.  Trilaciclib has the potential to decrease the clinically relevant consequences of these cytopenias, such as febrile neutropenia.

Potential  to  reduce  chemotherapy  dose-delays  and  dose  reductions.  Chemotherapy-induced  myelosuppression  is  the  major  dose  limiting
toxicity of cytotoxic chemotherapy and can lead to dose reductions and schedule delays that can limit therapeutic benefit. Trilaciclib has been
designed specifically to minimize myelosuppression and has the potential to enable maintenance of the indicated and planned chemotherapeutic
dose and schedule.

Potential for combination with immune checkpoint inhibitors. There are currently approximately 300 trials of which we are aware evaluating
checkpoint  inhibitors  in  combination  with  chemotherapy.  We  believe  that  administering  trilaciclib  with  chemotherapy/checkpoint  inhibitor
combinations  may  increase  efficacy.  We  are  collaborating  non-exclusively  with  Genentech  to  explore  the  utility  of  trilaciclib  and  their
checkpoint  inhibitor  Tecentriq  combined  with  chemotherapy.  Our  first  indication  is  first-line  SCLC  and  we  initiated  a  Phase  2  trial  in
combination with Tecentriq in the second quarter of 2017.We also anticipate trials in other indications.

Potential  broad  applicability.  We  believe  trilaciclib  has  the  potential  to  benefit  patients  treated  with  multiple  myelosuppressive
chemotherapeutic regimens across a wide range of oncology indications.

Convenience  of  administration.  Trilaciclib  is  designed  to  be  administered  via  an  IV  infusion  prior  to  chemotherapy  treatment.  This  dosing
regimen fits with standard clinical practice for chemotherapy and/or checkpoint inhibitor treatment.

Reduced  potential  of  secondary  hematological  malignancies.  Chemotherapy  has  been  linked  with  secondary  types  of  cancer  that  may  occur
years  after  initial  treatment.  HSPCs  are  especially  sensitive  to  chemotherapy,  and  damage  to  HSPCs  by  chemotherapy  can  lead  to  both
myelodysplastic syndrome and acute myelogenous leukemia. We believe that protecting HSPCs from the cytotoxic effects of chemotherapy has
the potential to reduce incidence of these secondary hematological malignancies.

Potential to reduce the overall cost of care. Chemotherapy-induced myelosuppression leads to severe adverse side effects, such as fatigue due
to anemia, infections due to neutropenia, and bleeding due to thrombocytopenia. These adverse side effects often require costly hospitalizations,
transfusions,  antibiotic  usage  and/or  treatment  with  growth  factor  support.  Because  trilaciclib  has  been  designed  specifically  to  minimize
myelosuppression, we believe that it has the potential to reduce the overall cost of care. Our market research with payers supports the value
proposition of trilaciclib.

4

 
 
 
 
 
 
 
Trilaciclib: preclinical and clinical development

Preclinical development

We  have  published  extensive  biochemical,  cellular  and  in vivo  data  on  trilaciclib  from  2015-2017.    Our  preclinical  data  show  that  trilaciclib  can  induce
transient  and  reversible  cell-cycle  arrest  of  HSPCs;  protect  HSPCs  from  damage  by  chemotherapy;  preserve  bone  marrow  and  immune  system  function;
improve  CBC  recovery;  protect  from  bone  marrow  exhaustion;  prevent  myeloid  skewing  and  consequent  lymphopenia;  activate  T-cells  in  the  tumor
microenvironment; and enhance chemotherapy and checkpoint inhibitor anti-tumor activity.

Completed Phase 1 clinical trial

In  2015,  we  completed  a  Phase  1  clinical  trial  of  trilaciclib  in  45  healthy  volunteers  in  the  Netherlands.  In  this  trial,  subjects  in  seven  cohorts  were
administered  a  single  ascending  dose  of  trilaciclib  between  6  mg/m²  and  192  mg/m².  The  purpose  of  this  trial  was  to  evaluate  the  safety  including  dose
limiting toxicities, or DLTs, serious adverse events, or SAEs, adverse events, or AEs, and pharmacokinetics, or PK, and identify a biologically effective dose
of trilaciclib. Published data from this trial demonstrated that trilaciclib was well tolerated, with no DLTs or SAEs reported. These data demonstrated that the
administration of trilaciclib resulted in the robust cell-cycle arrest of HSPCs for at least 32 hours and supported a starting dose of 200 mg/m 2 for the initial
studies in patients.

Ongoing clinical trials
Trilaciclib (IV CDK4/6 inhibitor):

  Initial indications
  1st -line 
Small Cell Lung Cancer

  2nd /3rd –line
Small Cell Lung Cancer

  Regimen
  + etoposide/carboplatin

  Phase
  1b/2a

  + topotecan

  1b/2a

metastatic  Triple          Negative
Breast Cancer
1st -line
Small Cell Lung Cancer

  +gemcitabine/carboplatin

  +Tecentriq/carboplatin/
etoposide

  2

  2

Ongoing Phase 1b/2a clinical trial in first-line treatment of SCLC

  Status and expected milestones
  Phase 1b & 2a enrollment complete 
Report updated Phase 1b, and preliminary
Phase 2a data in March 2018
  Phase 1b enrollment complete, anticipate
completing Phase 2a enrollment in Q2 2018
Report updated Phase 1b, and preliminary
Phase 2a data in Q4 2018
  Anticipate completing enrollment in Q2 2018
Report preliminary data in Q4 2018
  Enrollment  completed  in  Q1  2018  (two  quarters
ahead of schedule)

In 2015, we initiated a Phase 1b/2a clinical trial in first-line extensive-stage SCLC patients across multiple sites in the United States and Europe. The Phase
1b segment of the trial was designed to confirm the trilaciclib dose to be used in the randomized, placebo-controlled Phase 2a segment. The goals of the trial
are to evaluate the safety, myelopreservation, pharmacokinetics, and anti-tumor activity of trilaciclib in combination with the existing first-line chemotherapy
standard  of  care  regimen  of  etoposide  and  carboplatin  and  to  confirm  the  dose  to  be  used  in  future  trials.  All  patients  in  the  Phase  1b  segment  were
administered  three-week  cycles  of  trilaciclib  plus  etoposide/carboplatin,  with  an  estimated  four  to  six  cycles  administered  in  total  per  patient  based  on
historical practice. Trilaciclib was administered as an IV infusion prior to every dose of etoposide/carboplatin.

In the Phase 1b section of this trial, as reported at the American Society of Clinical Oncology meetings in June 2017, we treated 19 patients with multiple
cycles of trilaciclib and chemotherapy and did not have a single episode of febrile neutropenia – one of the most common adverse consequences of these
chemotherapy regimens. We also observed a dose dependent reduction in grade 3/4 hematologic adverse events.  The results from the Phase 1b study support
the hypothesis that trilaciclib could ameliorate the significant acute and long-term consequences of chemotherapy-induced myelosuppression by preserving
hematopoietic and immune system function. Based on these results, we initiated the randomized, placebo-controlled Phase 2a segment of the trial in fourth-
quarter of 2016 with a trilaciclib dose of 240 mg/m2 and completed enrollment of a total of 77 patients in the second quarter of 2017.  We expect to update
the data from the Phase 1b segment of the trial and to report preliminary data from the Phase 2a segment of the trial in March 2018.

5

 
 
 
 
 
 
 
 
 
 
 
Ongoing Phase 1b/2a clinical trial in second/third-line treatment of SCLC

In  2015,  we  initiated  a  Phase  1b/2a  clinical  trial  in  second/third-line  SCLC  patients  across  multiple  sites  in  the  United  States  and  Europe.  The  Phase  1b
segment of the trial was designed to confirm the trilaciclib dose to be used in the randomized, placebo-controlled Phase 2a segment of the trial. The goals of
the  trial  are  to  evaluate  the  safety,  myelopreservation,  PK,  and  anti-tumor  activity  of  trilaciclib  in  combination  with  the  existing  second/third-line
chemotherapy  standard  of  care  regimen  of  topotecan  and  to  confirm  the  dose  to  be  used  in  future  trials.  All  patients  in  the  Phase  1b  segment  were
administered three-week cycles of trilaciclib plus topotecan until the progression of disease. Trilaciclib was administered as an IV infusion prior to every dose
of topotecan. Trilaciclib doses of 200 to 280 mg/m2 and topotecan doses of 0.75 to 1.5 mg/m2 were tested across 7 cohorts in the completed Phase 1b open-
label segment of the trial. Upon completion of the Phase 1b segment of the trial, the doses chosen for the randomized, placebo-controlled Phase 2a segment of
this trial are trilaciclib 240 mg/m2 + topotecan 0.75 mg/m2 and trilaciclib 240 mg/m2 + topotecan 1.5 mg/m2.

In  the  Phase  1b  segment  we  treated  32  patients  with  trilaciclib  and  topotecan  without  any  episodes  of  febrile  neutropenia  or  treatment  related  SAEs.
Preliminary results from Phase 1b were reported at the IASCLC World Conference on Lung Cancer in December 2016. Based on these results, the Phase 2a
segment was initiated in the first quarter of 2017 and consists of a double blind-design with approximately 90 patients randomized on a 2:1 basis to receive
trilaciclib plus topotecan, or placebo plus topotecan. We plan to complete enrollment in this trial in the second quarter of 2018. We expect to update the data
from the Phase 1b segment of the trial and to report preliminary data from the Phase 2a segment of the trial in the fourth quarter of 2018.

Ongoing Phase 2 clinical trial in Triple Negative Breast Cancer (TNBC)

In  January  2017,  we  initiated  an  open  label,  randomized,  Phase  2  trial  that  is  expected  to  enroll  approximately  90  patients  with  first,  second  or  third-line
metastatic TNBC across multiple sites in the United States and Europe. The goals of the clinical trial are to evaluate the safety, myelopreservation, PK, and
anti-tumor activity of trilaciclib in combination with the existing chemotherapy standard of care regimen of gemcitabine and carboplatin. We expect to fully
enroll this trial in the second-quarter of 2018 and report preliminary data in the fourth-quarter of 2018.

Ongoing Phase 2 clinical trial in first-line treatment of SCLC with a checkpoint inhibitor

In December 2016, we entered into a non-exclusive agreement with Genentech to evaluate the combination of Genentech's immune checkpoint, anti-PD-L1
antibody Tecentriq with trilaciclib. Our first trial under the agreement is in first-line treatment for patients with extensive stage SCLC receiving carboplatin
and etoposide.  We initiated enrollment in this randomized, double-blinded, placebo-controlled Phase 2 trial in the second quarter of 2017.  The goals of the
clinical  trial  are  to  evaluate  the  safety,  overall  survival,  myelopreservation,  PK,  and  anti-tumor  activity  of  trilaciclib  in  combination  with  Tecentriq  and
chemotherapy.  We completed enrollment in the first quarter of 2018.

G1T38: Our potential best-in-class CDK4/6 inhibitor for patients with CDK4/6-dependent tumors

G1T38, our second clinical-stage candidate, is a potential best-in-class oral CDK4/6 inhibitor, to be used in combination with other targeted therapies to treat
multiple cancers. We rationally designed G1T38 to improve upon and address the shortcomings of the approved CDK4/6 inhibitors Ibrance®, Kisqali® and
Verzenio®. Our preclinical data and early human clinical data indicate the potential for continuous daily dosing, less dose-limiting neutropenia, and improved
tolerability. A Phase 1 trial of G1T38 in 75 healthy volunteers showed a favorable safety profile, and we initiated a Phase 1b/2a trial in ER+, HER2- breast
cancer in January 2017. Our plans for G1T38 include combinations in other cancers, such as non-small cell lung cancer, or NSCLC, where we expect to begin
a  Phase  1b/2  trial  in  March  2018  in  combination  with  the  epidermal  growth  factor  receptor  (EGFR)  inhibitor,  Tagrisso®.  We  believe  that  G1T38  has  the
potential to be the backbone therapy of multiple combination targeted therapy regimens.

Market opportunity for G1T38

The importance of CDK4/6 as a key regulator of tumor cell growth and proliferation in certain tumors has been validated by the FDA’s approval of Pfizer’s
CDK4/6 inhibitor Ibrance for the treatment of ER+, HER2- advanced breast cancer as initial endocrine therapy in combination with an aromatase inhibitor in
post-menopausal women and in women with disease progression following endocrine therapy in combination with fulvestrant, the approval in 2017 of Kisqali
in  combination  with  an  aromatase  inhibitor,  and  the  approval  in  2017  of  Verzenio  in  combination  with  fulvestrant.  Worldwide  sales  of  Ibrance  were  $2.1
billion and $3.1 billion in 2016 and 2017, respectively. Wall Street analysts estimate Ibrance peak annual worldwide sales to exceed $7 billion.

6

  
 
Advantages of G1T38

We believe that G1T38 has the potential to be a best-in-class CDK4/6 inhibitor. There are currently three other CDK4/6 inhibitors approved to treat ER+,
HER2- breast cancer - Ibrance, Kisqali, and Verzenio. Each of these drugs has shortcomings that we believe could be addressed by a best-in-class CDK4/6
inhibitor. Ibrance and Kisqali have long half-lives that can lead to drug accumulation and neutropenia, requiring a dosing regimen of 21 days on drug and a
treatment  holiday  of  at  least  seven  days  off  drug.  Kisqali  has  also  exhibited  cardiovascular  and  liver  side  effects.    Verzenio  has  demonstrated  significant
gastrointestinal issues, which can require administration of antidiarrheal therapies.  Verzenio has also exhibited liver and blood clotting side effects.

We believe that G1T38 has the potential to be best-in-class because of the following advantages:

•

•

•

•

•

Less myelotoxicity.  In  preclinical  studies,  G1T38  has  demonstrated  less  myelotoxicity  than  Ibrance,  but  equivalent  anti-tumor  efficacy.  We
believe this is due to the inherently different PK properties of G1T38.

Potential for continuous daily dosing.  Patients  on  Ibrance  and  Kisqali  can  only  be  given  the  drug  on  a  21  days-on,  followed  by  7  days-off,
schedule. Even with this dosing holiday, dose-delays and dose reductions due to persistent neutropenia are common. Our preclinical data and
clinical data to date with G1T38 support the potential for continuous daily dosing with less dose-limiting neutropenia.

Improved cardiovascular and liver safety. G1T38 has not shown any of the QT prolongation issues (seen with Kisqali) and liver injury (seen
with Kisqali and Verzenio).

Improved tolerability profile. We have designed G1T38 to be selective for CDK4/6 and have minimal CDK2 activity, as inhibition of CDK2 has
been associated with gastrointestinal toxicities.

Greater potential for combination therapies. We believe that G1T38 is the only selective CDK4/6 inhibitor in development that is not currently
owned by a large pharmaceutical company. We believe that other pharmaceutical and biotech companies with targeted therapies may want to
test a combination of their therapies with our CDK4/6 inhibitor. Accordingly, we believe we are in a strong position to explore collaborative
arrangements with these companies.

G1T38: preclinical and clinical development

Preclinical development

We have published extensive biochemical, cellular and in vivo data on G1T38 demonstrating: high potency and selectivity for CDK4/6; equivalent anti-tumor
activity  to  Ibrance  when  dosed  orally  once  daily  for  28-days  in  a  mouse  model  of  ER+,  HER2-  breast  cancer;  less  myelotoxicity  than  Ibrance  in  mouse
models, suggesting the potential for continuous daily dosing without the need for a treatment holiday; and anti-tumor efficacy in models of certain CDK4/6-
dependent tumor types, such as NSCLC and castrate resistant prostate cancer, or CRPC.

Completed Phase 1 clinical trial

In the fourth quarter of 2016, we completed a Phase 1 clinical trial of G1T38 in 75 healthy volunteers in the Netherlands. This was a single ascending dose,
placebo-controlled trial testing doses of 3 to 600 mg. In addition, G1T38 was dosed at 200 and 300 mg twice a day, 300 mg with and without food, and 300
mg as an oral solution. The goals of the clinical trial were to obtain PK and safety data to inform appropriate starting dose(s) for studies in patients. There
were no DLTs, SAEs, or grade 3/4 AEs reported in this study.

Ongoing clinical trials
G1T38 (oral CDK4/6 inhibitor):

Initial
indications
ER+, HER2- 
Breast Cancer
EGFR mutant
Non-small Cell Lung Cancer

Regimen
+Faslodex

+ Tagrisso

Phase
  1b/2a

  1b/2

  Status and expected milestones
Phase 1b enrollment ongoing 
Report preliminary Phase 1b data in Q2 2018
Initiate Phase 1b in March 2018

Ongoing Phase 1b/2a clinical trial in ER+, HER2- breast cancer

In January 2017, we initiated a Phase 1b/2a trial in ER+, HER2- breast cancer patients in combination with Faslodex®, an FDA-approved SERD. The trial is
expected to enroll up to 100 patients in Europe. The goals of the clinical trial are to evaluate the safety, PK, and anti-tumor activity of G1T38 in combination
with Faslodex and to determine the dose to be used in future trials. The Phase 1b

7

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
segment of the trial is open-label and consists of two arms, with G1T38 dosed continuously without a holiday, either once a day or twice a day in combination
with Faslodex. Once the dose and schedule have been determined, the Phase 2a segment will enroll approximately 30 patients at the recommended G1T38
dose and schedule in combination with Faslodex. All patients in the trial are being administered G1T38 orally continuously without a treatment holiday and
intramuscular, or IM, Faslodex per the label. Tumor lesions are being assessed under RECIST criteria by CT scans or MRI every 8 weeks.

Early clinical data from the first 24 patients enrolled in the trial suggest that G1T38 may be able to address the shortcomings of the other CDK4/6 inhibitors.
G1T38 has a shorter half-life and larger volume of distribution than Ibrance and Kisqali and is not expected to show drug accumulation. All of the enrolled
patients had a decline in neutrophil counts, which is expected and due to a mechanism-based decrease in neutrophil production caused by G1T38, which also
occurs with other CDK4/6 inhibitors such as Ibrance and Kisqali. No cardiovascular or liver side effects have been reported so far and there have been no
G1T38-related SAEs. The incidence of gastrointestinal AEs reported so far are similar to Ibrance and Kisqali and less than Verzenio. These early clinical data
indicate  the  potential  for  continuous  daily  dosing  of  G1T38  without  a  holiday  in  combination  with  Faslodex,  and  the  potential  for  improved  tolerability
compared to other marketed CDK4/6 inhibitors. We expect to report preliminary data from the Phase 1b segment of this trial in the second quarter of 2018.

G1T48: Our oral SERD

G1T48 is a potential first/best-in-class oral SERD, which we plan to initially develop as a single agent and in combination with G1T38 for the treatment of
ER+,  HER2-  breast  cancer.  We  believe  we  are  in  a  unique  position  as  the  only  emerging  biopharmaceutical  company  with  a  wholly  owned,  proprietary
combination of a SERD and an oral CDK4/6 inhibitor, a validated regimen in ER+, HER2- breast cancer. Based on compelling preclinical efficacy and safety
data, we filed an Investigational New Drug application (IND) with the U.S. Food and Drug Administration (FDA) in the fourth quarter of 2017. With the IND
now open, we expect to initiate a clinical trial in the second quarter of 2018.

Market opportunity for G1T48

Breast cancer is the most prevalent cancer in women, accounting for 30% of all female cancers in the United States. The major cause of death from breast
cancer is metastases, and approximately 30% of early-stage patients develop metastatic disease. Approximately 65% of breast cancers are ER+ and depend on
estrogen  signaling  for  growth  and  survival  of  the  malignant  cells.  Patients  with  ER+  breast  cancers  are  typically  treated  with  endocrine  therapies  such  as
aromatase inhibitors, or AIs, selective estrogen receptor modulators, or SERMs, and SERDs. AIs, which block the generation of estrogen, and SERMs, which
selectively inhibit an ER’s ability to bind estrogen, both block ER-dependent signaling but leave functional ERs present in breast cancer cells. For this reason,
although  AIs  and  SERMs  are  effective  treatments  for  some  breast  cancers,  many  patients  acquire  resistance  to  them  by  developing  the  ability  to  signal
through the ER in a ligand-independent manner. In contrast, SERDs are a class of endocrine therapies that directly induce ER degradation. Therefore, it is
believed that SERDs have the potential to treat ER+ tumors without allowing ligand-independent resistance to develop, and to act on AI- and SERM-resistant
ER-positive tumors.

Currently only one SERD, Faslodex, is approved for the treatment of ER+ metastatic breast cancer. Faslodex is administered as an IM injection, and requires
a loading dose during the first month of treatment. This means it is typically given on days 1, 15, and 29 of treatment and then once monthly thereafter. Each
treatment  typically  consists  of  two  injections,  one  into  each  buttock.  Injection  site  reactions  are  common,  occurring  in  approximately  10%  of  patients.
Injection site related events including sciatica, neuralgia, neuropathic pain, and peripheral neuropathy have been reported. Other frequently reported adverse
reactions with Faslodex include nausea (9.7%) and bone pain (9.4%).

While there are several oral SERDs in early clinical development, no one candidate has emerged as a clear front runner as an oral alternative to Faslodex
based on early results. Limited efficacy has been reported in some of the oral SERDs in development and one has been shown to possess ER agonist activity
without complete receptor degradation, suggesting that it is a SERM rather than a SERD with complete antagonist activity.

Advantages of G1T48

We believe that G1T48 has the potential to be first/best-in-class because of the following advantages:

•

•

Higher potency. In preclinical models of ER+, HER2- breast cancer, G1T48 is more potent than Faslodex in binding and degrading the ER and
inhibiting cell growth.

Improved  oral  efficacy.  G1T48  demonstrated  improved  activity  compared  to  another  oral  SERD  in  development  in  preclinical  models  of
endocrine resistance mediated by ER mutation. G1T48 also demonstrated better efficacy than other oral SERDs in development in a tamoxifen
resistant model of ER+, HER2- breast cancer.

8

 
 
•

•

Ease  of  administration.  The  only  approved  SERD,  Faslodex,  is  required  to  be  given  via  IM  injection.  We  have  designed  G1T48  to  be
administered orally.

Wholly owned proprietary combination regimen. To our knowledge, we are the only emerging biopharmaceutical company with both an oral
SERD (G1T48) and an oral CDK4/6 inhibitor (G1T38). We believe that being in the unique position of having this wholly owned proprietary
combination of a validated regimen for the treatment of ER+, HER2- breast cancer provides us a strategic and competitive advantage.

G1T48: Preclinical development
We have presented extensive biochemical, cellular and in vivo data on G1T48 demonstrating that it: has drug-like properties, is highly potent, is active on ER
mutant receptors, is highly selective, leads to complete ER degradation, demonstrated a favorable safety profile, and has oral efficacy.

We plan to initiate a Phase 1/2a clinical trial in the second quarter of 2018 with the goal of evaluating the safety, tolerability, and PK of the drug in breast
cancer patients.

Our Business Strategy

Our  goal  is  to  be  a  leader  in  the  discovery  and  development  of  CDK4/6  inhibitor-based  treatments  for  cancer.  Our  strategy  includes  the  following  key
components:
•

Develop trilaciclib in combination with chemotherapy across multiple indications. We believe that trilaciclib has the potential to be used to
treat patients receiving myelosuppressive chemotherapy across multiple oncology indications.

•

•

•

•

•

Develop trilaciclib in combination with immune checkpoint inhibitors. We believe that using trilaciclib in combination with chemotherapy
and checkpoint inhibitors has the potential to significantly enhance efficacy. In December 2016, we entered into a collaboration with Genentech
to evaluate trilaciclib in combination with Genentech’s checkpoint inhibitor Tecentriq in multiple indications.

Develop G1T38 as a best-in-class treatment across multiple cancer indications. We believe that G1T38 has the potential for less dose-limiting
neutropenia than Ibrance and Kisqali and an improved safety/tolerability profile versus Kisqali and Verzenio. We plan to develop G1T38 across
multiple cancer indications, either alone or with one or more strategic collaborators.

Rapidly advance G1T48 into clinical trials in combination with G1T38. The use of a selective CDK4/6 inhibitor in combination with a SERD
has  been  validated  by  the  FDA  approval  and  commercial  success  of  Ibrance.  With  an  oral  SERD  (G1T48)  and  an  oral  CDK4/6  inhibitor
(G1T38),  we  believe  we  are  in  a  unique  position  as  the  only  emerging  biopharmaceutical  company  with  a  wholly  owned  proprietary
combination for this validated anti-cancer regimen.

Pursue  global  development  of  combination  therapies.  We  believe  our  expertise  in  CDK4/6  biology  puts  us  in  an  advantageous  position  to
develop  proprietary  best-in-combination  or  first-in-combination  therapies  with  the  potential  for  improved  efficacy  and  safety.  We  are
developing  G1T38  to  be  used  in  combination  with  other  targeted  therapies  such  as  SERDs.  The  approval  of  Ibrance  has  created  significant
interest in the use of selective CDK4/6 inhibitors in combination with other targeted therapies for the treatment of cancer. Ibrance, Kisqali and
the other selective CDK4/6 inhibitor in clinical development are owned by large pharmaceutical companies. As a result, we believe that we are
in  a  strong  position  to  explore  collaborative  arrangements  with  other  pharmaceutical  and  biotechnology  companies  that  are  interested  in
combining their targeted therapies with G1T38.

Build a fully integrated oncology company. We plan to commercialize our product candidates on our own in the United States using a small
and  highly  specialized  sales  force.  We  may  also  establish  global  or  regional  collaborations  with  pharmaceutical  companies  to  leverage  their
development and commercialization capabilities and enable us to maximize the potential of our product candidates.

Commercialization

Given our stage of development, we have not yet established our own commercial organization or distribution capabilities. We believe our focus on oncology
will enable us to efficiently commercialize our product candidates on our own in the United States using a small and highly specialized sales force. However,
we may also establish global or regional collaborations with pharmaceutical companies to leverage their development and commercialization capabilities to
maximize the potential of our product candidates.

9

 
 
 
 
 
 
 
 
 
Manufacturing

We do not own or operate, and currently have no plans to establish any manufacturing facilities. We currently rely, and expect to continue to rely, on third
parties for the manufacture of our product candidates for preclinical and clinical testing, as well as for commercial manufacture of any drugs that we may
commercialize. To date, we have obtained active pharmaceutical ingredients, or API, formulations, and drug products for trilaciclib, G1T38 and G1T48 for
our preclinical studies and clinical trials from multiple third-party manufacturers. We obtain our supplies from these manufacturers on a purchase order basis
and do not have long-term supply arrangements in place. Redundant suppliers are in place for some of our APIs.  As development proceeds for our product
candidates, we will evaluate qualifying additional redundant manufacturers for API and drug product.  

Competition

The  development  and  commercialization  of  new  drug  therapies  is  highly  competitive.  We  will  face  competition  with  respect  to  all  therapeutics  we  may
develop or commercialize in the future from pharmaceutical and biotechnology companies worldwide. If any of our product candidates is approved, they will
compete  with  currently  marketed  drugs  and  therapies  used  for  treatment  of  the  same  indications,  and  potentially  with  product  candidates  currently  in
development  for  the  same  indications.  Many  of  the  entities  marketing  or  developing  potentially  competing  products  have  significantly  greater  financial
resources and expertise than we do in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals
and marketing. We believe the key competitive factors affecting the success of any approved product will be its efficacy, safety profile, price, convenience of
administration,  and  level  of  promotional  activity.  Accordingly,  our  commercial  opportunity  will  be  reduced  or  eliminated  if  our  competitors  develop  and
commercialize products that are more effective, have fewer side effects, are more convenient or are less expensive than any products that we may develop.

If trilaciclib is approved, it will compete with:

•

•

•
•

existing  growth  factor  support  treatments,  including  Neulasta®  (pegfigrastim),  Neupogen®  (filgrastim),  Procrit®  (epoeitin  alpha),  and
Aranesp® (darbepoetin alfa) as well as biosimilars of these products when available;

if approved, Rova-T® (rovalpituzumab tesirine), an antibody drug conjugate currently being developed by AbbVie for the treatment of patients
with SCLC;

if approved, the multiple immune checkpoint inhibitors in clinical trials for the treatment of patients with SCLC; and

multiple approved drugs or drugs that may be approved in the future for indications for which we may develop trilaciclib.

If G1T38 is approved, it will compete with:

•
•
•
•

•

Pfizer’s approved CDK4/6 inhibitor Ibrance;

Novartis’s approved CDK4/6 inhibitor Kisqali;

Eli Lilly’s approved CDK4/6 inhibitor Verzenio;

if approved, other non-selective CDK4/6 inhibitor product candidates in clinical development, including product candidates being developed by
FLX Bio and Onconova Therapeutics; and

multiple approved drugs or drugs that may be approved in the future for indications for which we may develop G1T38.

If G1T48 is approved, it will compete with:

•
•

•

the approved IM SERD, Faslodex, being marketed by AstraZeneca;

if  approved,  other  oral  SERDs  in  development  including:  RAD1901,  being  developed  by  Radius  Health;  GDC-9545,  being  developed  by
Genentech; AZD9496, being developed by AstraZeneca; SAR439859, being developed by Sanofi; and LSZ102, being developed by Novartis;
and

multiple approved drugs or drugs that may be approved in the future for indications for which we may develop G1T48.

Intellectual property

Our  commercial  success  depends  in  part  on  our  ability  to  obtain  and  maintain  proprietary  protection  for  our  CDK4/6  inhibitor  molecules,  including  our
CDK4/6 inhibitors in clinical trials and methods of treatment using our CDK4/6 inhibitors, alone and in combination with other therapeutic agents. We also
seek protection on processes for the production of our CDK4/6 inhibitors, formulations incorporating our CDK4/6 inhibitors, combinations of our product
candidates with other active agents and dosing

10

 
 
 
 
 
 
 
 
 
 
 
 
 
 
schedules and regimens related to our CDK4/6 inhibitors. Our success also depends on our ability to operate without infringing on the proprietary rights of
others and to prevent others from infringing our proprietary rights. Our policy is to seek to protect our proprietary position by, among other methods, filing
U.S.  and  foreign  patent  applications  covering  our  proprietary  technology,  inventions,  and  improvements  that  are  important  to  the  development  and
implementation  of  our  business.  In  addition,  we  plan  to  seek patent term adjustments, restorations,  and/or  patent  term  extensions  where  applicable  in  the
United States and other jurisdictions. We also rely on trade secrets, know-how, continuing technological innovation and potential in-licensing opportunities to
develop and maintain our proprietary position. Additionally, we expect to benefit, where appropriate, from statutory frameworks in the United States, Europe
and other countries that provide a period of clinical data exclusivity to compensate for the time required for regulatory approval of our drug products. See also
the “Government Regulation and Product Approval” section below.

We are the sole owner or exclusive licensee of all of our patents and currently filed patent applications that cover our product candidates. Our intellectual
property strategy is focused on patenting our CDK4/6 inhibitors, their uses, and methods of manufacturing as well as our licensed-in applications directed to
selective estrogen receptor degraders and their uses, manufacture, and combination with our CDK 4/6 inhibitors. We have obtained eleven composition-of-
matter patents in the United States on a number of our CDK4/6 inhibitors, including claims that cover our product candidates trilaciclib and G1T38, and we
continue to seek composition-of-matter patents on additional CDK4/6 inhibitors both in the United States and throughout the world. In addition, we have
obtained three method of treatment patents in the United States on a number of our CDK4/6 inhibitors, including claims that cover our product candidates
trilaciclib and G1T38. We  continue  to  seek  additional  patents  for  our  key  CDK4/6  inhibitors  and  their  uses  in  key  therapeutic  areas.  We  also  seek  patent
protection on methods of treatment that incorporate our CDK4/6 inhibitors in combination with other therapeutic agents to treat specific clinical indications
and  targeted  patient  populations.  Furthermore,  we  will  seek,  where  appropriate,  patent  protection  on  processes  of  making  certain  CDK4/6  inhibitors,  and
intermediates used in the processes.

We continually assess and refine our intellectual property strategies as we develop new technologies and product candidates. We plan to file additional patent
applications  based  on  our  intellectual  property  strategies  where  appropriate,  including  where  we  seek  to  adapt  to  competition  or  to  improve  business
opportunities. Further, we plan to file patent applications, as we consider appropriate under the circumstances, to protect new technologies that we develop.
Our patent filing strategy generally includes seeking patent protection in the United States, the European Union and in additional countries where we believe
such protection is likely to be useful, including one or more of Australia, Brazil, Canada, China, Hong Kong, India, Israel, Japan, Mexico, Russia, Singapore,
and South Korea.

Our owned and in-licensed patent estate as of December 31, 2017, on a worldwide basis, includes 132 granted or pending patent applications spread over 23
patent families with 14 granted U.S. patents, 21 pending U.S. applications, eight pending international patent applications filed under the Patent Cooperation
Treaty and 89 pending or granted patents that have entered the national phase of prosecution in countries outside the United States. The term of individual
patents depends upon the laws of the countries in which they are obtained. In the countries in which we currently file, the patent term is 20 years from the
earliest date of filing of a non-provisional patent application which serves as a priority application. However, the term of a U.S. patent may be extended to
compensate for the time required to obtain regulatory approval to sell a drug (a patent term extension) or by delays encountered during patent prosecution that
are caused by the USPTO (referred to as patent term adjustment). For example, the Hatch-Waxman Act permits a patent term extension for FDA-approved
drugs  of  up  to  five  years  beyond  the  expiration  of  the  patent.  The  length  of  the  patent  term  extension  is  related  to  the  length  of  time  the  drug  is  under
regulatory review and diligence during the review process. Patent term extensions cannot extend the remaining term of a patent beyond a total of 14 years
from the date of product approval, and only one patent covering an approved drug or its method of use may be extended. A similar kind of patent extension,
referred to as a Supplementary Protection Certificate, is available in Europe. Legal frameworks are also available in certain other jurisdictions to extend the
term of a patent. We currently intend to seek patent term extensions on any of our issued patents in any jurisdiction where we have a qualifying patent and the
extension is available; however, there is no guarantee that the applicable regulatory authorities, including the FDA in the United States, will agree with our
assessment  of  whether  such  extensions  should  be  granted,  and  even  if  granted,  the  length  of  such  extensions.  Further,  even  if  our  patent  is  extended,  the
patent, including the extended portion of the patent, may be held invalid or unenforceable by a court of final jurisdiction in the United States or a foreign
country.

Our current issued patents covering the composition of matter for our present clinical candidates trilaciclib and G1T38 will expire in 2031, exclusive of any
patent term extension, and patent applications covering our clinical candidate G1T48 will expire in 2036, if issued and exclusive of any patent term extension.
Our pending applications on additional methods of use of our clinical candidates, should they issue, will expire on dates ranging from 2034 to 2037. We plan
to file additional applications on aspects of our innovations that may have patent terms that extend beyond these dates. However, any of our patents, including
patents that we may rely on to protect our market for approved drugs, may be held invalid or unenforceable by a court of final jurisdiction. Alternatively, we
may decide that it is in our interest to settle a litigation in a manner that affects the term or enforceability of our patent. Changes in either the patent laws or in
interpretations of patent laws in the United States and other countries may diminish our ability to protect our inventions and enforce our intellectual property
rights. Accordingly, we cannot predict the breadth or enforceability of claims that have been or may be granted in our patents or in third-party patents. The
biotechnology and pharmaceutical industries are characterized by extensive litigation regarding patents and other intellectual property rights. Our ability to
obtain and maintain our proprietary position for our CDK4/6 inhibitors and technology will depend on our success in enforcing the claims that have been

11

granted or may grant. We do not know whether any of the pending patent applications that we have filed or may file or license from third parties will result in
the issuance of any additional patents. The issued patents that we own or may receive in the future may be challenged, invalidated, or circumvented, and the
rights granted under any issued patents may not provide us with sufficient protection or competitive advantages against competitors with similar technology.
Furthermore, our competitors may be able to independently develop and commercialize drugs with similar mechanisms of action and duplicate our methods
of treatments or strategies without infringing our patents. Because of the extensive time required for clinical development and regulatory review of a drug we
may develop, it is possible that, before any of our drugs can be commercialized, any related patent may expire or remain in force for only a short period
following commercialization, thereby reducing any advantage of any such patent.

Trilaciclib and G1T38 patent coverage

We own two issued U.S. Patents (U.S. 8,598,186 and U.S. 8,598,197) and one allowed U.S. application covering the trilaciclib compositions-of-matter and its
pharmaceutical composition. We also own three issued U.S. Patents (U.S. 8,598,186; U.S. 8,598,197; and U.S. 9,481,691) and one allowed U.S. application
covering the G1T38 composition-of-matter and pharmaceutical composition. We own corresponding issued patents covering trilaciclib and G1T38 and their
pharmaceutical compositions in Europe, Canada, Japan, Mexico, China, Australia, Russia, and Singapore. There are additional pending applications covering
these compounds and compositions in Europe, China, Brazil, Canada, Israel, India, Japan, South Korea, Mexico and Russia. The expected year of expiration
for these composition-of-matter patents, where issued, valid and enforceable, is 2031, without regard to any extensions, adjustments, or restorations of term
that may be available under national law.

In  addition,  we  own  an  issued  U.S.  Patent  (U.S.  9,487,530)  and  one  pending  U.S.  application  covering  the  use  of  trilaciclib  to  reduce  the  effect  of
chemotherapy on healthy cells in a subject being treated for CDK4/6 replication independent cancer. This patent family covers, for example, SCLC treatment
protocols  involving  chemotherapeutic  agents  carboplatin,  etoposide,  and/or  topotecan  along  with  trilaciclib  for  protection  of  healthy  replicating  cells  like
hematopoietic  stem  and  progenitor  cells.  The  patent  filing  also  covers  chemoprotection  of  healthy  replicating  cells  with  trilaciclib  during  the  treatment  of
CDK4/6 independent cancer including triple negative breast cancer. This patent filing is also pending in Europe, Canada, China, Hong Kong and Japan. In
January 2018, this patent filing was allowed in China. The expected year of expiration for this patent family, where issued, valid and enforceable, is 2034,
without regard to any extensions, adjustments, or restorations of term that may be available under national law.

We  also  own  a  U.S.  application  that  covers  an  advantageous  pharmacokinetic  profile  target  of  trilaciclib  for  the  protection  of  hematopoietic  stem  and
progenitor cells during chemotherapy. The expected year of expiration for this patent application, if issued, valid and enforceable, is 2036, without regard to
any extensions, adjustments, or restorations of term that may be available under U.S. law.

We  have  filed  an  international  application  under  the  Patent  Cooperation  Treaty  that  covers  the  administration  of  trilaciclib  in  combination  with  a  PD-L1
inhibitor  such  as  Tecentriq.  The  expected  year  of  expiration  for  this  patent  family,  where  issued,  valid  and  enforceable,  is  2037,  without  regard  to  any
extensions, adjustments, or restorations of term that may be available under national law.

In addition, we own a U.S. application that is directed to the treatment of retinoblastoma protein-negative, or RB-negative, tumors with the administration of a
topoisomerase inhibitor in combination with trilaciclib, to protect hematopoietic stem and progenitor cells during chemotherapeutic treatment. The expected
year of expiration of this patent application, if issued, valid and enforceable, is 2035, without regard to any extensions, adjustments, or restorations of term
that may be available under U.S. law.

We own two patent families that are directed to the use of G1T38 to treat RB-positive tumors. The first family includes an issued U.S. Patent (U.S. 9,527,857)
and  one  pending  U.S.  application  directed  to  the  treatment  of  RB-positive  cancers  with  G1T38.  The  issued  patent  covers  the  use  of  G1T38,  to  treat  RB-
positive breast cancer, colon cancer, ovarian cancer, NSCL cancer, prostate cancer, and glioblastoma. This patent filing is also pending in Europe, Canada,
China,  Hong  Kong  and  Japan.  The  expected  year  of  expiration  for  this  patent  family,  where  issued,  valid  and  enforceable,  is  2034,  without  regard  to  any
extensions,  adjustments,  or  restorations  of  term  that  may  be  available  under  national  law.  The  second  family  includes  a  U.S.  patent  application  and  a
European patent application  directed to the treatment of RB-positive cancers with G1T38 with additional active agents. The expected year of expiration for
this patent family, where issued, valid and enforceable, is 2035, without regard to any extensions, adjustments, or restorations of term that may be available
under national law.

We own a patent family directed to the use of G1T38 as an anti-neoplastic agent against a T or B cell cancer. This patent filing is also pending in Europe,
Canada,  China  and  Japan.  The  expected  year  of  expiration  for  this  patent  family,  where  issued,  valid  and  enforceable,  is  2034,  without  regard  to  any
extensions, adjustments, or restorations of term that may be available under national law.

We have filed a patent application that covers the administration of G1T38 in combination with an EGFR inhibitor. The expected year of expiration for this
patent,  where  issued,  valid  and  enforceable,  is  2038,  without  regard  to  any  extensions,  adjustments,  or  restorations  of  term  that  may  be  available  under
national law.

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G1T48 Patent Coverage

We  have  exclusively  licensed  from  University  of  Illinois,  or  UIC,  three  international  applications  filed  under  the  Patent  Cooperation  Treaty  and  two  U.S.
pending applications that cover G1T48 and related compounds and their pharmaceutical compositions and use as selective estrogen receptor down-regulators.
The  expected  year  of  expiration  for  this  patent  family,  where  issued,  valid  and  enforceable,  is  2036,  without  regard  to  any  extensions,  adjustments,  or
restorations of term that may be available under national law. Under the Exclusive License Agreement with UIC, G1 has the right to prosecute the licensed
applications, subject to review by UIC.

We co-own, along with UIC, one U.S. patent application, which converted to a PCT application on January 6, 2018, directed to the combination of G1T48
and related compounds with G1T38 and related compounds for the treatment of estrogen-modulated disorders such as RB-positive breast cancer. We have
exclusively licensed UIC’s rights in this co-owned application. The expected year of expiration for this patent family, where issued, valid and enforceable, is
2037, without regard to any extensions, adjustments, or restorations of term that may be available under national law.

A  number  of  our  pending  patent  applications  covering  certain  aspects  of  using  our  current  clinical  candidates  have  not  yet  issued.  As  with  other
biotechnology and pharmaceutical companies, our ability to obtain and maintain a proprietary position on our drug candidates and technologies will depend
on our success in obtaining effective patent claims on these pending patents and enforcing those claims if granted. However, our pending patent applications,
and any patent applications that we may in the future file or license from third parties, may not result in the issuance of patents. We also cannot predict the
breadth of claims that may be allowed or enforced in our patents.

Any issued patents that we have received or may receive in the future may be challenged, invalidated or circumvented. In addition, because of the extensive
time required for clinical development and regulatory review of a drug candidate we may develop, it is possible that, before any of our drug candidates can be
commercialized, any related patent may expire or remain in force for only a short period following commercialization, thereby limiting protection such patent
would afford the respective product and any competitive advantage such patent may provide. Moreover, even our issued patents do not guarantee us the right
to  practice  our  technology  in  relation  to  the  commercialization  of  our  clinical  candidates.  The  area  of  patent  and  other  intellectual  property  rights  in
pharmaceuticals  is  an  evolving  one  with  many  risks  and  uncertainties,  and  third  parties  may  have  blocking  patents  that  could  be  used  to  prevent  us  from
commercializing our clinical candidates.

Exclusive license for G1T48

In  November  2016,  we  entered  into  a  license  agreement  with  the  University  of  Illinois,  or  UIC,  pursuant  to  which  we  obtained  an  exclusive,  worldwide
license to make, have made, use, import, sell and offer for sale of certain SERDs, including G1T48, covered by patent rights owned UIC. The rights licensed
to us are for all fields of use.

Under the terms of the agreement we paid a one-time only, non-refundable upfront fee of $500,000, and we are required to pay UIC low single-digit royalties
on all net sales of products and a share of any sublicensing revenues. We are also obligated to pay annual maintenance fees, which are fully creditable against
any royalty payments made by us. We may also be required to pay UIC milestone payments of up to an aggregate of $2.625 million related to the initiation
and execution of clinical trials and first commercial sale of a product in multiple countries. We are responsible for all future patent prosecution costs.

The term of the license agreement will continue on a country-by-country basis until the later of (i) the expiration of the last valid claim within the patent rights
covering the product in such country, (ii) the expiration of market exclusivity in such country and (iii) the 10th anniversary of the first commercial sale in
such country. UIC may terminate the agreement in the event (i) we fail to pay any amount or make any report when required to be made and fail to cure such
failure within 30 days after receipt of notice, (ii) we are in breach of any provision of the agreement and fail to remedy such breach within 45 days after
receipt of notice, (iii) we make a report to UIC under the agreement that is determined to be materially false, (iv) we declare insolvency or bankruptcy or
(v) we take any action that causes patent rights or technical information to be subject to any lien or encumbrance and fail to remedy within 45 days of receipt
of notice. We may terminate the agreement at any time upon at least 90 days’ written notice. Upon expiration or termination of the agreement, all rights revert
to UIC.

Trade secrets

In addition to patents, we rely upon unpatented trade secrets and know-how and continuing technological innovation to develop and maintain our competitive
position. We seek to protect our proprietary information, in part, using confidentiality agreements with our commercial partners, collaborators, employees,
and consultants, and invention assignment agreements with our employees. These agreements are designed to protect our proprietary information and, in the
case  of  the  invention  assignment  agreements,  to  grant  us  ownership  of  technologies  that  are  developed  through  a  relationship  with  a  third  party.  These
agreements  may  be  breached,  and  we  may  not  have  adequate  remedies  for  any  breach.  In  addition,  our  trade  secrets  may  otherwise  become  known  or  be
independently

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discovered by competitors. To the extent that our commercial partners, collaborators, employees, and consultants use intellectual property owned by others in
their work for us, disputes may arise as to the rights in related or resulting know-how and inventions.

Government regulation and product approval

FDA approval process

In  the  United  States,  pharmaceutical  products  are  subject  to  extensive  regulation  by  the  U.S.  Food  and  Drug  Administration,  or  FDA.  The  Federal  Food,
Drug, and Cosmetic Act, or the FDC Act, and other federal and state statutes and regulations, govern, among other things, the research, development, testing,
manufacture,  storage,  recordkeeping,  approval,  labeling,  promotion  and  marketing,  distribution,  post-approval  monitoring  and  reporting,  sampling,  and
import and export of pharmaceutical products. Failure to comply with applicable U.S. requirements may subject a company to a variety of administrative or
judicial sanctions, such as FDA refusal to approve pending new drug applications, or NDAs, warning letters, voluntary product recalls, product seizures, total
or partial suspension of production or distribution, injunctions, fines, civil penalties and criminal prosecution.

Pharmaceutical product development in the United States typically involves the performance of nonclinical laboratory and animal tests, the submission to the
FDA of an investigational new drug application, or IND, which must become effective before clinical testing may commence, and adequate, well-controlled
clinical  trials  to  establish  the  safety  and  effectiveness  of  the  drug  for  each  indication  for  which  FDA  approval  is  sought.  Satisfaction  of  FDA  pre-market
approval requirements typically takes many years, and the actual time required may vary substantially based upon the type, complexity, and novelty of the
product or disease.

Preclinical  tests  include  laboratory  evaluation  of  product  chemistry,  formulation,  and  toxicity,  as  well  as  animal  studies  to  assess  the  characteristics  and
potential  safety  and  efficacy  of  the  product.  The  conduct  of  the  preclinical  and  other  nonclinical  tests  must  comply  with  certain  federal  regulations  and
requirements, including good laboratory practices. The results of preclinical testing are submitted to the FDA as part of an IND along with other information,
including information about product chemistry, manufacturing and controls, and a proposed clinical trial protocol. Long-term nonclinical tests, such as animal
tests of reproductive toxicity and carcinogenicity, may continue after the IND is submitted.

A  30-day  waiting  period  after  the  submission  of  each  IND  is  required  prior  to  the  commencement  of  clinical  testing  in  humans.  If  the  FDA  has  neither
commented on nor questioned the IND within this 30-day period, the clinical trial proposed in the IND may begin.

Clinical trials involve the administration of the investigational new drug to healthy volunteers or patients under the supervision of a qualified investigator.
Clinical trials must be conducted: (i) in compliance with federal regulations, including those encompassing good clinical practice, or GCP, requirements that
are meant to protect the rights and health of patients and to define the roles of clinical trial sponsors, investigators, and monitors, and (ii) under protocols
detailing  the  objectives  of  the  clinical  trial,  the  parameters  to  be  used  in  monitoring  safety  and  the  effectiveness  criteria  to  be  evaluated.  Each  protocol
involving testing on U.S. patients and subsequent protocol amendments must be submitted to the FDA as part of the IND.

The FDA may order the temporary, or permanent, discontinuation of a clinical trial at any time by imposing a clinical hold or impose other sanctions if it
believes that the clinical trial either is not being conducted in accordance with FDA requirements or presents an unacceptable risk to the clinical trial patients.
The clinical trial protocol and informed consent information for patients in clinical trials must also be submitted to an institutional review board, or IRB, at
each  site  where  a  clinical  trial  will  be  performed  for  approval.  An  IRB  may  also  require  the  clinical  trial  at  the  site  to  be  halted,  either  temporarily  or
permanently, for failure to comply with the IRB’s requirements or it may impose other conditions.

Clinical trials to support NDAs for marketing approval are typically conducted in three sequential phases, but the phases may overlap. In Phase 1, the initial
introduction  of  the  drug  into  healthy  human  subjects  or  patients,  the  drug  is  tested  to  assess  metabolism,  pharmacokinetics,  pharmacological  actions,  side
effects associated with increasing doses, and, if possible, early evidence of effectiveness. Phase 2 usually involves clinical trials in a limited patient population
to  determine  the  effectiveness  of  the  drug  for  a  particular  indication,  dosage  tolerance,  and  optimum  dosage,  and  to  identify  common  adverse  effects  and
safety  risks.  If  a  compound  demonstrates  evidence  of  effectiveness  and  an  acceptable  safety  profile  in  Phase  2  evaluations,  Phase  3  clinical  trials  are
undertaken to obtain the additional information about clinical efficacy and safety in a larger number of patients, typically at geographically dispersed clinical
trial sites, to permit the FDA to evaluate the overall benefit-risk relationship of the drug and to provide adequate information for the labeling of the drug. In
most cases, the FDA requires two adequate and well-controlled Phase 3 clinical trials to demonstrate the efficacy of the drug. A single Phase 3 clinical trial
with other confirmatory evidence may be sufficient in rare instances where the clinical trial is a large multicenter trial demonstrating internal consistency and
a statistically very persuasive finding of a clinically meaningful effect on mortality, irreversible morbidity, or prevention of a disease with potentially serious
outcome, and confirmation of the result in a second clinical trial would be practically or ethically impossible.

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After completion of the required clinical testing, an NDA is prepared and submitted to the FDA. FDA approval of the NDA is required before marketing of
the product may begin in the United States. The NDA must include the results of all nonclinical, clinical, and other testing and a compilation of data relating
to  the  product’s  pharmacology,  chemistry,  manufacture,  and  controls.  The  cost  of  preparing  and  submitting  an  NDA  is  substantial.  Under  federal  law,  the
submission of most NDAs is additionally subject to a substantial application user fee, currently $2,038,100 for an NDA with clinical information, and the
manufacturer  and/or  sponsor  under  an  approved  NDA  is  also  subject  to  annual  product  and  establishment  user  fees,  currently  $97,750  per  product  and
$512,200 per establishment. These fees are typically increased annually.

The  FDA  has  60  days  from  its  receipt  of  an  NDA  to  determine  whether  the  application  will  be  accepted  for  filing  based  on  the  agency’s  threshold
determination that it is sufficiently complete to permit substantive review. Once the submission is accepted for filing, the FDA begins an in-depth review. The
FDA has agreed to certain performance goals in the review of NDAs. The FDA seeks to review applications for standard review drug products within ten
months, and applications for priority review drugs within six months. Priority review can be applied to drugs intended to treat a serious condition and that the
FDA  determines  offer  major  advances  in  treatment,  or  provide  a  treatment  where  no  adequate  therapy  exists.  The  review  process  for  both  standard  and
priority  review  may  be  extended  by  FDA  for  three  additional  months  to  consider  certain  late-submitted  information,  or  information  intended  to  clarify
information already provided in the submission.

The FDA may also refer applications for novel drug products, or drug products that present difficult questions of safety or efficacy, to an advisory committee,
which is typically a panel that includes clinicians and other experts, for review, evaluation, and a recommendation as to whether the application should be
approved. The FDA is not bound by the recommendation of an advisory committee, but it generally follows such recommendations. Before approving an
NDA, the FDA will typically inspect one or more clinical sites to assure compliance with GCP. Additionally, the FDA will inspect the facility or the facilities
at  which  the  drug  is  manufactured.  The  FDA  will  not  approve  the  product  unless  compliance  with  current  good  manufacturing  practice,  or  cGMP,
requirements is satisfactory and the NDA contains data that provide substantial evidence that the drug is safe and effective in the indication studied.

After the FDA evaluates the NDA and the manufacturing facilities, it issues either an approval letter or a complete response letter. A complete response letter
generally outlines the deficiencies in the submission and may require substantial additional testing, or information, in order for the FDA to reconsider the
application. If, or when, those deficiencies have been addressed to the FDA’s satisfaction in a resubmission of the NDA, the FDA will issue an approval letter.
The FDA has committed to reviewing such resubmissions in two or six months depending on the type of information included.

An  approval  letter  authorizes  commercial  marketing  of  the  drug  with  specific  prescribing  information  for  specific  indications.  As  a  condition  of  NDA
approval, the FDA may require a risk evaluation and mitigation strategy, or REMS, to help ensure that the benefits of the drug outweigh the potential risks.
REMS can include medication guides, communication plans for health care professionals, and elements to assure safe and effective use, or ETASU. ETASU
can  include,  but  are  not  limited  to,  special  training  or  certification  for  prescribing  or  dispensing,  dispensing  only  under  certain  circumstances,  special
monitoring, and the use of patient registries. The requirement for a REMS can materially affect the potential market and profitability of the drug. Moreover,
product approval may require substantial post-approval testing and surveillance to monitor the drug’s safety or efficacy. Once granted, product approvals may
be withdrawn if compliance with regulatory requirements is not maintained or problems are identified following initial marketing.

Disclosure of clinical trial information

Sponsors  of  clinical  trials  of  certain  FDA-regulated  products,  including  prescription  drugs,  are  required  to  register  and  disclose  certain  clinical  trial
information  on  a  public  website  maintained  by  the  U.S.  National  Institutes  of  Health.  Information  related  to  the  product,  patient  population,  phase  of
investigation, clinical trial sites and investigator, and other aspects of the clinical trial is made public as part of the registration. Sponsors are also obligated to
disclose the results of these clinical trials after completion if the product candidate is ultimately approved, and disclosure of the results of these clinical trials
will  be  delayed  until  such  approval.  Competitors  may  use  this  publicly-available  information  to  gain  knowledge  regarding  the  design  and  progress  of  our
development programs.

The Hatch-Waxman act

Orange book listing

In seeking approval for a drug through an NDA, applicants are required to list with the FDA each patent whose claims cover the applicant’s product. Upon
approval  of  a  drug,  each  of  the  patents  listed  in  the  application  for  the  drug  is  then  published  in  the  FDA’s  Approved  Drug  Products  with  Therapeutic
Equivalence Evaluations, commonly known as the Orange Book. Drugs listed in the Orange Book can, in turn, be cited by potential generic competitors in
support  of  approval  of  an  abbreviated  new  drug  application,  or  ANDA.  An  ANDA  provides  for  marketing  of  a  drug  product  that  has  the  same  active
ingredients in the same strengths and dosage

15

form as the listed drug and has been shown through bioequivalence testing to be therapeutically equivalent to the listed drug. Other than the requirement for
bioequivalence testing, ANDA applicants are not required to conduct, or submit results of, nonclinical or clinical tests to prove the safety or effectiveness of
their  drug  product.  Drugs  approved  in  this  way  are  commonly  referred  to  as  “generic  equivalents”  to  the  listed  drug,  and  can  often  be  substituted  by
pharmacists under prescriptions written for the original listed drug.

The ANDA applicant is required to certify to the FDA concerning any patents listed for the approved product in the FDA’s Orange Book. Specifically, the
applicant must certify that: (i) the required patent information has not been filed; (ii) the listed patent has expired; (iii) the listed patent has not expired, but
will expire on a particular date and approval is sought after patent expiration; or (iv) the listed patent is invalid or will not be infringed by the new product.
The ANDA applicant may also elect to submit a section viii statement, certifying that its proposed ANDA label does not contain or carve out any language
regarding the patented method-of-use, rather than certify to a listed method-of-use patent.

If the applicant does not challenge the listed patents, the ANDA application will not be approved until all the listed patents claiming the referenced product
have expired. A certification that the new product will not infringe the already approved product’s listed patents, or that such patents are invalid, is called a
Paragraph IV certification. If the ANDA applicant has provided a Paragraph IV certification to the FDA, the applicant must also send notice of the Paragraph
IV certification to the NDA and patent holders once the ANDA has been accepted for filing by the FDA. The NDA and patent holders may then initiate a
patent infringement lawsuit in response to the notice of the Paragraph IV certification. The filing of a patent infringement lawsuit within 45 days of the receipt
of a Paragraph IV certification automatically prevents the FDA from approving the ANDA until the earlier of 30 months, expiration of the patent, settlement
of the lawsuit, or a decision in the infringement case that is favorable to the ANDA applicant.

The ANDA application also will not be approved until any applicable non-patent exclusivity listed in the Orange Book for the referenced product has expired.

Exclusivity

Upon NDA approval of a new chemical entity or NCE, which is a drug that contains no active moiety that has been approved by the FDA in any other NDA,
that drug receives five years of marketing exclusivity during which time the FDA cannot receive any ANDA seeking approval of a generic version of that
drug. Certain changes to a drug, such as the addition of a new indication to the package insert, are associated with a three-year period of exclusivity during
which the FDA cannot approval an ANDA for a generic drug that includes the change.

An ANDA may be submitted one year before NCE exclusivity expires if a Paragraph IV certification is filed. If there is no listed patent in the Orange Book,
there may not be a Paragraph IV certification, and, thus, no ANDA may be filed before the expiration of the exclusivity period.

Patent term extension

After NDA approval, owners of relevant drug patents may apply for up to a five-year patent term extension. The allowable patent term extension is calculated
as half of the drug’s testing phase—the time between when the IND becomes effective and NDA submission—and all of the review phase—the time between
NDA submission and approval, up to a maximum of five years. The time can be shortened if FDA determines that the applicant did not pursue approval with
due diligence. The total patent term after the extension may not exceed 14 years.

For patents that might expire during the application phase, the patent owner may request an interim patent extension. An interim patent extension increases
the patent term by one year and may be renewed up to four times. For each interim patent extension granted, the post-approval patent extension is reduced by
one  year.  The  director  of  the  PTO  must  determine  that  approval  of  the  drug  covered  by  the  patent  for  which  a  patent  extension  is  being  sought  is  likely.
Interim patent extensions are not available for a drug for which an NDA has not been submitted.

Advertising and promotion

Once an NDA is approved, a product will be subject to certain post-approval requirements. For instance, FDA closely regulates the post-approval marketing
and  promotion  of  drugs,  including  standards  and  regulations  for  direct-to-consumer  advertising,  off-label  promotion,  industry-sponsored  scientific  and
educational activities and promotional activities involving the internet. Drugs may be marketed only for the approved indications and in accordance with the
provisions of the approved labeling. Changes to some of the conditions established in an approved application, including changes in indications, labeling, or
certain  manufacturing  processes  or  facilities,  require  submission  and  FDA  approval  of  a  new  NDA  or  NDA  supplement  before  the  change  can  be
implemented. An NDA

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supplement for a new indication typically requires clinical data similar to that in the original application, and the FDA uses the same procedures and actions
in reviewing NDA supplements as it does in reviewing NDAs.

Adverse event reporting and cGMP compliance

Adverse  event  reporting  and  submission  of  periodic  reports  is  required  following  FDA  approval  of  an  NDA.  The  FDA  also  may  require  post-marketing
testing, known as Phase 4 testing, REMS, and surveillance to monitor the effects of an approved product, or the FDA may place conditions on an approval
that  could  restrict  the  distribution  or  use  of  the  product.  In  addition,  quality-control,  drug  manufacture,  packaging,  and  labeling  procedures,  among  other
things, must continue to conform to cGMP after approval. Drug manufacturers and certain of their subcontractors are required to register their establishments
with FDA and certain state agencies. Registration with the FDA subjects entities to periodic unannounced inspections by the FDA, during which the agency
inspects manufacturing facilities to assess compliance with cGMP. Accordingly, manufacturers must continue to expend time, money and effort in the areas of
production and quality-control to maintain compliance with cGMP. Regulatory authorities may impose a range of enforcement actions, including bringing a
seizure and injunction in court, withdraw product approvals or request voluntary product recalls if a company fails to comply with cGMP requirements.

Pediatric information

Under the Pediatric Research Equity Act, or PREA, NDAs or supplements to NDAs must contain data to assess the safety and effectiveness of the drug for
the claimed indications in all relevant pediatric subpopulations and to support dosing and administration for each pediatric subpopulation for which the drug
is  safe  and  effective.  The  sponsor  must  submit  an  initial  Pediatric  Study  Plan,  or  PSP,  within  60  days  of  an  end-of-phase  2  meeting  or  as  may  be  agreed
between the sponsor and the FDA. The initial PSP must include an outline of the pediatric study or studies that the sponsor plans to conduct, including study
objectives and design, age groups, relevant endpoints and statistical approach, or a justification for not including such detailed information, and any request
for a deferral of pediatric assessments or a full or partial waiver of the requirement to provide data from pediatric studies along with supporting information.
The FDA and the sponsor must reach agreement on the PSP. A sponsor can submit amendments to an agreed-upon initial PSP at any time if changes to the
pediatric plan need to be considered based on data collected from nonclinical studies, early phase clinical trials, and/or other clinical development programs.
The FDA may grant full or partial waivers, or deferrals, for submission of data.

The Best Pharmaceuticals for Children Act, or BPCA, provides NDA holders a six-month extension of any exclusivity—patent or non-patent—for a drug if
certain  conditions  are  met,  including  satisfaction  of  a  pediatric  trial  as  described  above.  Conditions  for  exclusivity  include  the  FDA’s  determination  that
information relating to the use of a new drug in the pediatric population may produce health benefits in that population, the FDA making a written request for
pediatric clinical trials, and the applicant agreeing to perform, and reporting on, the requested clinical trials within the statutory timeframe. Applications under
the BPCA are treated as priority applications, with all of the benefits that designation confers.

Special protocol assessment

A company may reach an agreement with FDA under the Special Protocol Assessment, or SPA, process as to the required design and size of clinical trials
intended to form the primary basis of an efficacy claim. Under the FDC Act and FDA guidance implementing the statutory requirement, an SPA is generally
binding upon the FDA except in limited circumstances, such as if the FDA identifies a substantial scientific issue essential to determining safety or efficacy
after the clinical trial begins, public health concerns emerge that were unrecognized at the time of the protocol assessment, the sponsor and FDA agree to the
change in writing, or if the clinical trial sponsor fails to follow the protocol that was agreed upon with the FDA.

Expedited review and approval

The FDA has various programs, including Fast Track, priority review, accelerated approval and breakthrough designation which are intended to expedite or
simplify the process for reviewing drugs, and/or provide for approval on the basis of surrogate endpoints. Even if a drug qualifies for one or more of these
programs, the FDA may later decide that the drug no longer meets the conditions for qualification or that the time period for FDA review or approval will not
be shortened. Generally, drugs that may be eligible for these programs are those for serious or life-threatening conditions, those with the potential to address
unmet  medical  needs,  and  those  that  offer  meaningful  benefits  over  existing  treatments.  For  example,  Fast  Track  is  a  process  designed  to  facilitate  the
development,  and  expedite  the  review,  of  drugs  to  treat  serious  diseases  and  fill  an  unmet  medical  need.  The  request  may  be  made  at  the  time  of  IND
submission and generally no later than the pre-NDA meeting. The FDA will respond within 60 calendar days of receipt of the request. Priority review, which
is  requested  at  the  time  of  NDA  submission,  is  designed  to  give  drugs  that  offer  major  advances  in  treatment  or  provide  a  treatment  where  no  adequate
therapy exists an initial review within six months as compared to a standard review time of ten months. Although Fast Track and priority review do not affect
the standards for approval, the FDA will attempt to facilitate early and frequent meetings with a sponsor of a Fast Track designated drug and expedite review
of the application for a drug designated for

17

priority review. Accelerated approval provides an earlier approval of drugs to treat serious diseases, and that fill an unmet medical need based on a surrogate
endpoint, which is a laboratory measurement or physical sign used as an indirect or substitute measurement representing a clinically meaningful outcome.
Discussions with the FDA about the feasibility of an accelerated approval typically begin early in the development of the drug in order to identify,  among
other things, an appropriate endpoint. As a condition of approval, the FDA may require that a sponsor of a drug receiving accelerated approval perform post-
marketing clinical trials to confirm the appropriateness of the surrogate marker clinical trial.

Another expedited program is that for Breakthrough Therapy. A Breakthrough Therapy designation is designed to expedite the development and review of
drugs that are intended to treat a serious condition where preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over
available therapy on a clinically significant endpoint(s). A sponsor may request Breakthrough Therapy designation at the time that the IND is submitted, or no
later than at the end-of-Phase 2 meeting. The FDA will respond to a Breakthrough Therapy designation request within sixty days of receipt of the request. A
drug that receives Breakthrough Therapy designation is eligible for all fast track designation features, intensive guidance on an efficient drug development
program, beginning as early as Phase 1 and commitment from the FDA involving senior managers.

Regulation of companion diagnostic devices

If we decide that a diagnostic test would provide useful information for patient selection or if the FDA requires us to develop such a test, we may work with a
collaborator to develop an in vitro diagnostic, or companion test. The FDA regulates in vitro diagnostic tests as medical devices, and the type of regulation to
which such a test will be subjected will depend, in part, on a risk assessment by the FDA as well as a determination of whether the test is intended to yield
results  that  would  be  helpful  to  know  versus  one  that  the  FDA  or  we  believe  is  necessary  to  know  for  the  safe  and  effective  use  of  our  drugs  under
development.

The FDA issued Guidance on In-Vitro Companion Diagnostic Devices in August 2014, which is intended to assist companies developing in vitro companion
diagnostic devices and companies developing therapeutic products that depend on the use of a specific in vitro companion diagnostic for the safe and effective
use of the product. The FDA defined an in vitro companion diagnostic device, or IVD companion diagnostic device, as a device that provides information that
is essential for the safe and effective use of a corresponding therapeutic product. The use of an IVD companion diagnostic device with a therapeutic product
will be stipulated in the instructions for use in the labeling of both the diagnostic device and the corresponding therapeutic product, including the labeling of
any generic equivalents of the therapeutic product. The FDA expects that the therapeutic product sponsor will address the need for an approved or cleared
IVD  companion  diagnostic  device  in  its  therapeutic  product  development  plan  and  that,  in  most  cases,  the  therapeutic  product  and  its  corresponding
companion diagnostic will be developed contemporaneously.

Europe/Rest of world government regulation

In addition to regulations in the United States, we are and will be subject, either directly or through our distribution partners, to a variety of regulations in
other jurisdictions governing, among other things, clinical trials and commercial sales and distribution of our products, if approved.

Whether or not we obtain FDA approval for a product, we must obtain the requisite approvals from regulatory authorities in non-U.S. countries prior to the
commencement of clinical trials or marketing of the product in those countries. Certain countries outside of the United States have a process that requires the
submission  of  a  clinical  trial  application  much  like  an  IND  prior  to  the  commencement  of  human  clinical  trials.  In  Europe,  for  example,  a  clinical  trial
application, or CTA, must be submitted to the competent national health authority and to independent ethics committees in each country in which a company
plans to conduct clinical trials. Once the CTA is approved in accordance with a country’s requirements, clinical trials may proceed in that country.

The  requirements  and  process  governing  the  conduct  of  clinical  trials,  product  licensing,  pricing  and  reimbursement  vary  from  country  to  country,  even
though there is already some degree of legal harmonization in the European Union member states resulting from the national implementation of underlying
E.U. legislation. In all cases, the clinical trials are conducted in accordance with GCP and other applicable regulatory requirements.

To  obtain  regulatory  approval  of  a  new  drug,  or  medicinal  product  in  the  European  Union  sponsor  must  obtain  approval  of  a  marketing  authorization
application. The way in which a medicinal product can be approved in the European Union depends on the nature of the medicinal product

The centralized procedure results in a single marketing authorization granted by the European Commission that is valid across the European Union, as well as
in Iceland, Liechtenstein and Norway. The centralized procedure is compulsory for human drugs that are: (i) derived from biotechnology processes, such as
genetic engineering, (ii) contain a new active substance indicated for the treatment of certain diseases, such as HIV/AIDS, cancer, diabetes, neurodegenerative
diseases, autoimmune and other immune dysfunctions and viral diseases, (iii) officially designated “orphan drugs” (drugs used for rare human diseases) and
(iv) advanced-therapy medicines,

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such as gene-therapy, somatic cell-therapy or tissue-engineered  medicines.  The  centralized  procedure  may  at  the  request  of  the  applicant  also  be  used  for
human drugs which do not fall within the above mentioned categories if the human drug (a) contains a new active substance which was not authorized in the
European Community; or (b) the applicant shows that the medicinal product constitutes a significant therapeutic, scientific or technical innovation or that the
granting of authorization in the centralized procedure is in the interests of patients or animal health at the European Community level.

Under the centralized procedure in the European Union, the maximum timeframe for the evaluation of a marketing authorization application by the EMA is
210  days  (excluding  clock  stops,  when  additional  written  or  oral  information  is  to  be  provided  by  the  applicant  in  response  to  questions  asked  by  the
Committee for Medicinal Products for Human Use, or CHMP), with adoption of the actual marketing authorization by the European Commission thereafter.
Accelerated evaluation might be granted by the CHMP in exceptional cases, when a medicinal product is expected to be of a major public health interest from
the point of view of therapeutic innovation, defined by three cumulative criteria: the seriousness of the disease to be treated; the absence of an appropriate
alternative  therapeutic  approach,  and  anticipation  of  exceptional  high  therapeutic  benefit.  In  this  circumstance,  EMA  ensures  that  the  evaluation  for  the
opinion of the CHMP is completed within 150 days and the opinion issued thereafter.

The  mutual  recognition  procedure,  or  MRP,  for  the  approval  of  human  drugs  is  an  alternative  approach  to  facilitate  individual  national  marketing
authorizations within the European Union. Basically, the MRP may be applied for all human drugs for which the centralized procedure is not obligatory. The
MRP is applicable to the majority of conventional medicinal products, and is based on the principle of recognition of an already existing national marketing
authorization by one or more member states.

The  characteristic  of  the  MRP  is  that  the  procedure  builds  on  an  already  existing  marketing  authorization  in  a  member  state  of  the  E.U.  that  is  used  as
reference in order to obtain marketing authorizations in other E.U. member states. In the MRP, a marketing authorization for a drug already exists in one or
more member states of the E.U. and subsequently marketing authorization applications are made in other European Union member states by referring to the
initial  marketing  authorization.  The  member  state  in  which  the  marketing  authorization  was  first  granted  will  then  act  as  the  reference  member  state.  The
member states where the marketing authorization is subsequently applied for act as concerned member states.

The MRP is based on the principle of the mutual recognition by European Union member states of their respective national marketing authorizations. Based
on a marketing authorization in the reference member state, the applicant may apply for marketing authorizations in other member states. In such case, the
reference member state shall update its existing assessment report about the drug in 90 days. After the assessment is completed, copies of the report are sent
to all member states, together with the approved summary of product characteristics, labeling and package leaflet. The concerned member states then have 90
days to recognize the decision of the reference member state and the summary of product characteristics, labeling and package leaflet. National marketing
authorizations shall be granted within 30 days after acknowledgement of the agreement.

Should any Member State refuse to recognize the marketing authorization by the reference member state, on the grounds of potential serious risk to public
health, the issue will be referred to a coordination group. Within a timeframe of 60 days, member states shall, within the coordination group, make all efforts
to reach a consensus. If this fails, the procedure is submitted to an EMA scientific committee for arbitration. The opinion of this EMA Committee is then
forwarded to the Commission, for the start of the decision-making process. As in the centralized procedure, this process entails consulting various European
Commission Directorates General and the Standing Committee on Human Medicinal Products or Veterinary Medicinal Products, as appropriate.

For other countries outside of the European Union, such as countries in Eastern Europe, Latin America or Asia, the requirements governing the conduct of
clinical trials, product licensing, pricing and reimbursement vary from country to country. In all cases, again, the clinical trials are conducted in accordance
with GCP and the other applicable regulatory requirements.

If we fail to comply with applicable foreign regulatory requirements, we may be subject to, among other things, fines, suspension of clinical trials, suspension
or withdrawal of regulatory approvals, product recalls, seizure of products, operating restrictions and criminal prosecution.

Employees

As of December 31, 2017, we had 44 full-time employees, including 36 in research and development and eight in general and administrative functions. We
have  no  collective  bargaining  agreements  with  our  employees,  and  we  have  not  experienced  any  work  stoppages.  We  consider  our  relations  with  our
employees to be good.

Available Information

Our internet address is www.g1therapeutics.com.  Our annual reports on Form 10‑K, quarterly reports on Form 10‑Q, current reports on Form 8‑K, and all
amendments to those reports, are available to you free of charge through the Investors section of our website as

19

soon  as  reasonably  practicable  after  such  materials  have  been  electronically  filed  with,  or  furnished  to,  the  Securities  and  Exchange  Commission,  or  the
SEC.  The information found on our website is not part of this or any other report we file with, or furnish to, the SEC.

Item 1A. Risk Factors.

Investing in our common stock involves a high degree of risk. You should carefully consider the risks and uncertainties described below, together with all of
the  other  information  in  this  Annual  Report,  including  our  financial  statements  and  related  notes,  before  investing  in  our  common  stock.  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  affect  us.  If  any  of  the  following  risks  occur,  our  business,  operating  results  and  prospects  could  be
materially harmed. In that event, the price of our common stock could decline, and you could lose part or all of your investment.

Risks related to our financial position and need for additional capital

We have incurred significant operating losses since our inception. We expect to incur losses for the foreseeable future and may never achieve or maintain
profitability.

We  have  incurred  significant  operating  losses  since  our  inception.  We  incurred  net  losses  of  $60.1  million  for  the  year  ended  December  31,  2017,  $30.3
million for the year ended December 31, 2016, and $20.3 million for the year ended December 31, 2015. As of December 31, 2017, we had an accumulated
deficit of $129.1 million. Our product candidates span a range from preclinical development to Phase 2 clinical trials, and it may be several years, if ever,
before  we  have  a  product  candidate  ready  for  commercialization.  To  date,  we  have  financed  our  operations  primarily  through  sales  of  our  preferred  and
common stock. We expect to continue to incur significant expenses and increasing operating losses for the foreseeable future. The net losses we incur may
fluctuate significantly from quarter to quarter. We anticipate that our expenses will increase substantially if and as we:

continue  development  of  our  product  candidates,  including  initiating  additional  clinical  trials  of  trilaciclib  and  G1T38  and  initiating  clinical
trials of our product candidate, G1T48;
identify and develop new product candidates;
seek marketing approvals for our product candidates that successfully complete clinical trials;
establish a sales, marketing and distribution infrastructure to commercialize any products for which we may obtain marketing approval;
achieve market acceptance of our product candidates in the medical community and with third-party payors;

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• maintain, expand and protect our intellectual property portfolio;
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hire additional personnel;
enter into collaboration arrangements, if any, for the development of our product candidates or in-license other products and technologies;
achieve milestones requiring payment under our in-licensing programs;
add operational, financial and management information systems and personnel, including personnel to support our product development and
planned future commercialization efforts; and
incur increased costs as a result of operating as a public company.

•

•

Because of the numerous risks and uncertainties associated with developing pharmaceutical drugs, we are unable to predict the extent of any future losses or
when we will become profitable, if at all. In addition, our expenses could increase beyond expectations if we are required by the FDA or foreign regulatory
agencies, to perform studies and clinical trials in addition to those that we currently anticipate, or if there are any delays in our or our partners completing
clinical trials or the development of any of our product candidates.

To become and remain profitable, we must develop and eventually commercialize a product or products with significant market potential. This will require us
to be successful in a range of challenging activities, including the following:

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completing clinical trials of our product candidates that meet their clinical endpoints;
obtaining marketing approval for our product candidates;
manufacturing, marketing and selling those products for which we may obtain marketing approval; and
achieving market acceptance of our product candidates in the medical community and with third-party payors.

We may never succeed in these activities and, even if we do, may never generate revenues that are significant or large enough to achieve profitability. If we
do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become and remain profitable
would decrease the value of the company and could impair our ability to raise capital, maintain our discovery and preclinical development efforts, expand our
business or continue our operations and may require

20

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
us to raise additional capital that may dilute your ownership interest. A decline in the value of our company could also cause you to lose all or part of your
investment.

Our limited operating history may make it difficult for you to evaluate the success of our business to date and to assess our future viability.

We are an early-stage biopharmaceutical company. Biopharmaceutical drug development is a highly speculative undertaking and involves a substantial degree
of  risk.  Our  operations  to  date  have  been  limited  to  organizing  and  staffing  our  company,  business  planning,  raising  capital,  developing  our  technology,
identifying potential product candidates, undertaking preclinical studies, and conducting clinical trials of trilaciclib and G1T38. We have not yet demonstrated
our ability to successfully complete large-scale, pivotal clinical trials, obtain marketing approvals, manufacture a commercial scale product, or arrange for a
third party to do so on our behalf, or conduct sales and marketing activities necessary for successful product commercialization. Typically, it takes several
years to develop one new drug from the time it is discovered to when it is available for treating patients. In addition, as a new business, we may encounter
unforeseen expenses, difficulties, complications, delays and other known and unknown factors. We will need to transition from a company with a research
focus to a company capable of supporting commercial activities. We may not be successful in such a transition.

We  will  need  substantial  additional  funding.  If  we  are  unable  to  raise  capital  when  needed,  we  would  be  compelled  to  delay,  reduce  or  eliminate  our
product development programs or commercialization efforts.

The development of pharmaceutical drugs is capital-intensive. We expect our expenses to increase in parallel with our ongoing activities, particularly as we
conduct larger-scale clinical trials of, and seek marketing approval for, our product candidates. In addition, if we obtain marketing approval for any of our
product candidates, we expect to incur significant commercialization expenses related to product sales, marketing, manufacturing and distribution. We may
also need to raise additional funds sooner if we choose to pursue additional indications and/or geographies for our product candidates or otherwise expand
more  rapidly  than  we  presently  anticipate.  Furthermore,  we  have  incurred  and  expect  to  continue  to  incur  additional  costs  associated  with  operating  as  a
public company. Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise
capital  when  needed  or  on  attractive  terms,  we  would  be  forced  to  delay,  reduce  or  eliminate  our  clinical  programs,  development  efforts  or  any  future
commercialization efforts.

As of December 31, 2017, we had $103.8 million in cash and cash equivalents. We believe that, based upon our current operating plan, our existing capital
resources  will  be  sufficient  to  fund  our  anticipated  operations  for  greater  than  12  months  from  the  date  of  filing  this  Annual  Report.  Our  future  capital
requirements and the period for which we expect our existing resources to support our operations may vary significantly from what we expect. Our monthly
spending levels vary based on new and ongoing research and development and other corporate activities. Because the length of time and activities associated
with  successful  research  and  development  of  our  product  candidates  is  highly  uncertain,  we  are  unable  to  estimate  the  actual  funds  we  will  require  for
development  and  any  approved  marketing  and  commercialization  activities.  In  addition,  our  future  capital  requirements  will  depend  on  many  factors,  and
could increase significantly as a result of many factors, including:

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the scope, progress, results and costs of preclinical development, laboratory testing and clinical trials for our product candidates;
the scope, prioritization and number of our research and development programs;
the costs, timing and outcome of regulatory review of our product candidates;
the extent to which we enter into non-exclusive, jointly funded clinical research collaboration arrangements, if any, for the development of our
product candidates in combination with other companies’ products;
our ability to establish collaboration arrangements for the development of our product candidates on favorable terms, if at all;
the achievement of milestones or occurrence of other developments that trigger payments under our license agreement and any collaboration
agreements into which we may enter, if any;
the extent to which we are obligated to reimburse, or entitled to reimbursement of, clinical trial costs under future collaboration agreements, if
any;
the extent to which we acquire or in-license product candidates and technologies, such as G1T48, and the terms of such in-licenses;
the  costs  of  future  commercialization  activities,  including  product  sales,  marketing,  manufacturing  and  distribution,  for  any  of  our  product
candidates for which we receive marketing approval;
revenue, if any, received from commercial sales of our product candidates, should any of our product candidates receive marketing approval;
and
the  costs  of  preparing,  filing  and  prosecuting  patent  applications,  maintaining  and  enforcing  our  intellectual  property  rights  and  defending
intellectual property-related claims.

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Conducting preclinical studies and clinical trials is a time-consuming, expensive and uncertain process that can take years to complete, and we may never
generate the necessary data or results required to obtain marketing approval and achieve product sales. In addition, our product candidates, if approved, may
not achieve commercial success. Our commercial revenues, if any, will be derived from sales of products that may not be commercially available for several
years, if ever. Accordingly, we will need to continue to rely on additional financing to achieve our business objectives.

Any  additional  fundraising  efforts  may  divert  our  management  from  their  day-to-day  activities,  which  may  adversely  affect  our  ability  to  develop  and
commercialize our product candidates. Volatility in the financial markets have generally made equity and debt financing more difficult to obtain and may
have a material adverse effect on our ability to meet our fundraising needs. We cannot guarantee that future financing will be available in sufficient amounts
or  on  terms  acceptable  to  us,  if  at  all.  Moreover,  the  terms  of  any  financing  may  adversely  affect  the  holdings  or  the  rights  of  our  stockholders  and  the
issuance of additional securities, whether equity or debt, by us, or the possibility of such issuance, may cause the market price of our shares to decline.

If  we  are  unable  to  obtain  funding  on  a  timely  basis,  we  may  be  required  to  significantly  curtail,  delay  or  discontinue  one  or  more  of  our  research  or
development  programs  or  the  commercialization  of  any  product  candidate  or  be  unable  to  expand  our  operations  or  otherwise  capitalize  on  our  business
opportunities, as desired, which could materially affect our business, financial condition and results of operations.

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

Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of private and public
equity financings, debt financings, collaborations, strategic alliances and licensing arrangements. The sale of additional equity or convertible debt securities
would dilute all of our stockholders. The incurrence of indebtedness would result in increased fixed payment obligations, and we may be required to agree to
certain restrictive covenants, such as limitations on our ability to incur additional debt, limitations on our ability to acquire, sell or license intellectual property
rights, limitations on declaring dividends and other operating restrictions that could adversely impact our ability to conduct our business. We could also be
required to seek funds through collaborations, strategic alliances or licensing arrangements with third parties, and we could be required to do so at an earlier
stage than otherwise would be desirable. In connection with any such collaborations, strategic alliances or licensing arrangements, we may be required to
relinquish valuable rights to our intellectual property, future revenue streams, research programs or product candidates, grant rights to develop and market
product candidates that we would otherwise prefer to develop and market ourselves, or otherwise agree to terms unfavorable to us, any of which may have a
material adverse effect on our business, operating results and prospects.

Risks related to development of our product candidates

Initial success in our ongoing clinical trials may not be indicative of results obtained when these trials are completed or in later stage trials.

We are currently evaluating trilaciclib in four clinical trials: two Phase 1b/2a trials in patients with small cell lung cancer, or SCLC, an additional Phase 2 trial
in combination with Tecentriq in SCLC and a Phase 2 trial in patients with triple-negative breast cancer, or TNBC. While trilaciclib has shown compelling
response rates and favorable tolerability in early-stage trials, including the completed Phase 1b segments of the two Phase 1b/2a trials in SCLC, these trials
are not complete, and we may not see such favorable data in these ongoing or in future clinical trials involving trilaciclib. Similarly, favorable results obtained
from  the  early-stage  trial  of  G1T38  may  not  be  replicated  in  the  ongoing  Phase  1/2  trial  in  ER+,  HER2-  breast  cancer  or  in  any  future  clinical  trials.
Furthermore,  there  can  be  no  assurance  that  any  of  our  clinical  trials  will  ultimately  be  successful  or  support  further  clinical  development  of  any  of  our
product candidates. There is a high failure rate for drugs and biologics proceeding through clinical trials. A number of companies in the pharmaceutical and
biotechnology  industries  have  suffered  significant  setbacks  in  clinical  development  even  after  achieving  promising  results  in  earlier  studies,  and  any  such
setbacks in our clinical development could have a material adverse effect on our business and operating results.

Preliminary  and  interim  data  from  our  clinical  studies,  including  the  Phase  1b  segments  of  our  Phase  1b/2a  trials  of  trilaciclib,  may  change  as  more
patient data become available.

Preliminary or interim data from our clinical studies, including those from the Phase 1b segments of our Phase 1b/2a trials of trilaciclib, are not necessarily
predictive  of  final  results.  Preliminary  and  interim  data  are  subject  to  the  risk  that  one  or  more  of  the  clinical  outcomes  may  materially  change,  as  more
patient data become available and we issue our final clinical study report. As a result, preliminary and interim data should be viewed with caution until the
final data are available. Material adverse changes in the final data compared to the interim data could significantly harm our business prospects.

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We are very early in our development efforts. If we are unable to successfully develop and commercialize our product candidates or experience significant
delays in doing so, our business will be materially harmed.

We  currently  do  not  have  any  products  that  have  gained  marketing  approval.  We  have  invested  substantially  all  of  our  efforts  and  financial  resources
identifying  and  developing  our  CDK4/6  inhibitor  product  candidates,  trilaciclib  and  G1T38,  and  our  oral  SERD  product  candidate,  G1T48.  Our  ability  to
generate product revenues, which may not occur for several years, if ever, will depend on the successful development and eventual commercialization of one
or more of our product candidates. We currently generate no revenues from sales of any drugs, and we may never be able to develop or commercialize a
marketable drug. Each of our product candidates will require development, management of development and manufacturing activities, marketing approval in
multiple jurisdictions, obtaining manufacturing supply, building of a commercial organization, substantial investment and significant marketing efforts before
we generate any revenues from drug sales.

We  have  not  yet  demonstrated  an  ability  to  successfully  overcome  many  of  the  risks  and  uncertainties  frequently  encountered  by  companies  in  new  and
rapidly evolving fields, particularly in the biopharmaceutical area. For example, to execute our business plan, we will need to successfully:

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execute development activities for our product candidates, including successful enrollment in and completion of clinical trials;
obtain required marketing approvals for the development and commercialization of our product candidates;
obtain and maintain patent and trade secret protection and regulatory exclusivity for our product candidates and ensure that we do not infringe
the valid patent rights of third parties;
protect, leverage and expand our intellectual property portfolio;
establish  and  maintain  clinical  and  commercial  manufacturing  capabilities  or  make  arrangements  with  third-party  manufacturers  for  clinical
and commercial manufacturing;
build  and  maintain  robust  sales,  distribution  and  marketing  capabilities,  either  on  our  own  or  in  collaboration  with  strategic  partners,  if  our
product candidates are approved;
gain acceptance for our product candidates, if approved, by patients, the medical community and third-party payors;
compete effectively with other therapies;
obtain and maintain healthcare coverage and adequate reimbursement;

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• maintain a continued acceptable safety profile for our product candidates following approval, if approved;
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• manage our spending as costs and expenses increase due to preclinical development, clinical trials, marketing approvals and commercialization.

develop and maintain any strategic relationships we elect to enter into, if any;
enforce and defend intellectual property rights and claims; and

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

Our  development  of  a  CDK4/6  to  reduce  chemotherapy-induced  myelosuppression  is  novel,  unproven  and  rapidly  evolving  and  may  never  lead  to  a
marketable product.

Trilaciclib,  is  a  short-acting  intravenous  CDK4/6  inhibitor.  The  use  of  a  CDK4/6  inhibitor  to  reduce  chemotherapy-induced  myelosuppression  is  a  novel
approach,  and  we  believe  that  we  are  the  only  company  currently  developing  a  CDK4/6  inhibitor  for  this  patient  population.  The  scientific  evidence  to
support  the  feasibility  of  developing  this  product  candidate  is  both  preliminary  and  limited.  Even  though  trilaciclib  has  demonstrated  positive  results  in
preclinical studies and early-stage clinical trials, we may not succeed in demonstrating safety and efficacy of trilaciclib in larger-scale clinical trials.

Advancing this novel therapy creates significant challenges for us, including:

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obtaining marketing approval, as the FDA and other regulatory authorities have limited experience with commercial development of a CDK4/6
inhibitor for this type of use;
educating  medical  personnel  regarding  the  potential  safety  benefits,  as  well  as  the  challenges,  of  incorporating  our  product  candidates,  if
approved, into their treatment regimens; and
establishing sales and marketing capabilities upon obtaining any marketing approval to gain market acceptance of a novel therapy.

If we experience delays or difficulties in the enrollment of patients in clinical trials, development of our product candidates may be delayed or prevented,
which would have a material adverse effect on our business.

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Identifying and qualifying patients to participate in clinical trials for our product candidates is critical to our success. In particular, because we are initially
focused on patients with diseases with genetically defined tumors, our ability to enroll eligible patients may be limited or may result in slower enrollment than
we anticipate. We may not be able to initiate or continue clinical trials for our product candidates if we are unable to locate and enroll a sufficient number of
eligible patients to participate in these trials. Patient enrollment may be affected by many factors including:

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the severity of the disease under investigation;
the eligibility criteria for the clinical trial in question;
the perceived risks and benefits of the product candidate under study;
the efforts to facilitate timely enrollment in clinical trials;
the patient referral practices of physicians;
the availability of competing therapies and clinical trials; and
the proximity and availability of clinical trial sites for prospective patients.

If we experience delays or difficulties in the enrollment of patients in clinical trials, our clinical trials may be delayed or terminated. Any delays in completing
our clinical trials will increase our costs, delay or prevent our product candidate development and approval process, and jeopardize our ability to commence
product sales and generate revenue. Any of these occurrences may harm our business, financial condition and prospects significantly.

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

The risk of failure in drug development is high. Before obtaining marketing approval from regulatory authorities for the sale of any of our product candidates,
we must complete preclinical development and conduct extensive clinical trials to demonstrate the safety and efficacy of our product candidates in humans.
Clinical trials are expensive, difficult to design and implement and can take several years to complete, and their outcomes are inherently uncertain. Failure
can occur at any time during the clinical trial process. Further, the results of preclinical studies and early clinical trials of our product candidates may not be
predictive of the results of later-stage clinical trials, and interim results of a clinical trial do not necessarily predict final results. Moreover, preclinical and
clinical  data  are  often  susceptible  to  varying  interpretations  and  analyses,  and  many  companies  that  have  believed  their  product  candidates  performed
satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of their products. It is impossible to predict when or
if any of our product candidates will prove effective or safe in humans or will receive marketing approval.

We may experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent our ability to receive marketing approval or
commercialize our product candidates. Clinical trials may be delayed, suspended or prematurely terminated because costs are greater than we anticipate or for
a variety of reasons, such as:

•
•

•

•

•
•
•

•

•

•

•

delay or failure in reaching agreement with the FDA or a comparable foreign regulatory authority on a trial design that we are able to execute;
delay  or  failure  in  obtaining  authorization  to  commence  a  trial  or  inability  to  comply  with  conditions  imposed  by  a  regulatory  authority
regarding the scope or design of a clinical trial;
delays  in  reaching,  or  failure  to  reach,  agreement  on  acceptable  terms  with  prospective  trial  sites  and  prospective  contract  research
organizations, or CROs, the terms of which can be subject to extensive negotiation and may vary significantly among different CROs and trial
sites;
inability,  delay,  or  failure  in  identifying  and  maintaining  a  sufficient  number  of  trial  sites,  many  of  which  may  already  be  engaged  in  other
clinical programs;
delay or failure in recruiting and enrolling suitable subjects to participate in a trial;
delay or failure in having subjects complete a trial or return for post-treatment follow-up;
clinical sites and investigators deviating from the clinical protocol, failing to conduct the trial in accordance with regulatory requirements, or
dropping out of a trial;
failure to initiate or delay of or failure to complete a clinical trial as a result of an IND being placed on clinical hold by the FDA, or for other
reasons;
lack of adequate funding to continue a clinical trial, including unforeseen costs due to enrollment delays, requirements to conduct additional
clinical trials and increased expenses associated with the services of our CROs and other third parties;
clinical  trials  of  our  product  candidates  may  produce  negative  or  inconclusive  results,  and  we  may  decide,  or  regulators  may  require  us,  to
conduct additional clinical trials or abandon product development programs;
the number of patients required for clinical trials of our product candidates may be larger than we anticipate, enrollment in these clinical trials
may be slower than we anticipate, or participants may drop out of these clinical trials at a higher rate than we anticipate;

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•

•

•

•

•

our third-party contractors may fail to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or at
all;
regulators, or a Data Safety Monitoring Board, or DSMB, if one is used for our clinical trials, may require that we suspend or terminate our
clinical  trials  for  various  reasons,  including  noncompliance  with  regulatory  requirements,  unforeseen  safety  issues  or  adverse  side  effects,
failure to demonstrate a benefit from using a drug, or a finding that the participants are being exposed to unacceptable health risks;
the  supply  or  quality  of  our  product  candidates  or  other  materials  necessary  to  conduct  clinical  trials  of  our  product  candidates  may  be
insufficient;
the FDA or other regulatory authorities may require us to submit additional data or impose other requirements before permitting us to initiate a
clinical trial; or
there may be changes in governmental regulations or administrative actions.

Many of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of marketing
approval for our product candidates. Further, the FDA may disagree with our clinical trial design and our interpretation of data from clinical trials or may
change the requirements for approval even after it has reviewed and commented on the design for our clinical trials.

If we are required to conduct additional clinical trials or other studies of our product candidates beyond those that we currently contemplate, if we are unable
to successfully complete clinical trials of our product candidates or other studies, if the results of these trials or tests are not positive or are only modestly
positive or if there are safety concerns, we may:

•
•
•
•

•
•

be delayed in obtaining marketing approval for our product candidates;
not obtain marketing approval for our product candidates at all;
obtain approval for indications or patient populations that are not as broad as intended or desired;
obtain approval with labeling that includes significant use or distribution restrictions or safety warnings that would reduce the potential market
for our products or inhibit our ability to successfully commercialize our products;
be subject to additional post-marketing restrictions and/or requirements; or
have the product removed from the market after obtaining marketing approval.

Our  product  development  costs  will  also  increase  if  we  experience  delays  in  preclinical  and  clinical  development  or  receiving  the  requisite  marketing
approvals. We do not know whether any of our preclinical studies or clinical trials will need to be restructured or will be completed on schedule, or at all.
Significant  preclinical  or  clinical  trial  delays  also  could  shorten  any  periods  during  which  we  may  have  the  exclusive  right  to  commercialize  our  product
candidates or allow our competitors to bring products to market before we do and impair our ability to successfully commercialize our product candidates and
may harm our business and results of operations.

Risks related to marketing approval of our product candidates

If  we  are  not  able  to  obtain,  or  if  there  are  delays  in  obtaining,  required  marketing  approvals,  we  will  not  be  able  to  commercialize  our  product
candidates, and our ability to generate revenue will be materially impaired.

Our  product  candidates  and  the  activities  associated  with  their  development  and  commercialization,  including  their  design,  testing,  manufacture,  safety,
efficacy, recordkeeping, labeling, storage, approval, advertising, promotion, sale, distribution, import and export are subject to comprehensive regulation by
the  FDA  and  other  regulatory  agencies  in  the  United  States  and  by  comparable  authorities  in  other  countries.  These  requirements  include  submissions  of
safety and other post-marketing information and reports, registration and listing requirements, current good manufacturing practice, or cGMP, requirements
relating  to  manufacturing,  quality  control,  quality  assurance  and  corresponding  maintenance  of  records  and  documents,  including  periodic  inspections  by
FDA and other regulatory authorities, requirements regarding the distribution of samples to physicians and recordkeeping. Before we can commercialize any
of our product candidates, each such product candidate must be approved by the FDA pursuant to a new drug application, or NDA, in the United States, by
the  European  Medicines  Agency,  or  EMA,  pursuant  to  a  marketing  authorization  application,  or  MAA,  in  the  European  Union,  and  by  similar  regulatory
authorities outside the United States prior to commercialization.

The process of obtaining marketing approvals, both in the United States and abroad, is expensive and takes several years, if approval is obtained at all, and
can  vary  substantially  based  upon  a  variety  of  factors,  including  the  type,  complexity  and  novelty  of  the  product  candidates  involved.  Failure  to  obtain
marketing approval for a product candidate will prevent us from commercializing the product candidate. We have not received approval to market any of our
product  candidates  from  regulatory  authorities  in  any  jurisdiction.  We  have  limited  experience  in  planning  and  conducting  the  clinical  trials  required  for
marketing approvals, and we expect to rely on third-party contract research organizations, or CROs, to assist us in this process. Obtaining marketing approval
requires  the  submission  of  extensive  preclinical  and  clinical  data  and  supporting  information  to  regulatory  authorities  for  each  therapeutic  indication  to
establish  the  product  candidate’s  safety  and  efficacy.  Securing  marketing  approval  also  requires  the  submission  of  information  about  the  product
manufacturing process, and in many cases the inspection of manufacturing facilities by the regulatory authorities. Our product

25

 
 
 
 
 
 
 
 
 
 
 
candidates  may  not  be  effective,  may  be  only  moderately  effective  or  may  prove  to  have  undesirable  or  unintended  side  effects,  toxicities  or  other
characteristics that may preclude our obtaining marketing approval or prevent or limit commercial use. Regulatory authorities have substantial discretion in
the  approval  process  and  may  refuse  to  accept  any  application  or  may  decide  that  our  data  are  insufficient  for  approval  and  require  additional  preclinical
studies  or  clinical  trials.  Our  product  candidates  could  be  delayed  in  receiving,  or  fail  to  receive,  marketing  approval  for  many  reasons,  including  the
following:

the FDA or comparable foreign regulatory authorities may disagree with the design or implementation of our clinical trials;

•
• we may be unable to demonstrate to the satisfaction of the FDA or comparable foreign regulatory authorities that a product candidate is safe

•

and effective for its proposed indication;
the results of clinical trials may not meet the level of statistical significance required by the FDA or comparable foreign regulatory authorities
for approval;

• we may be unable to demonstrate that a product candidate’s clinical and other benefits outweigh its safety risks;
•
•

the FDA or comparable foreign regulatory authorities may disagree with our interpretation of data from preclinical studies or clinical trials;
the data collected from clinical trials of our product candidates may not be sufficient to support the submission of an NDA or other submission
to obtain marketing approval in the United States or elsewhere;
third-party manufacturers or our clinical or commercial product candidates may be unable to meet the FDA’s cGMP requirements or similar
requirements of foreign regulatory authorities; and
the approval requirements or policies of the FDA or comparable foreign regulatory authorities may significantly change in a manner rendering
our clinical data insufficient for approval.

•

•

In  addition,  even  if  we  were  to  obtain  approval,  regulatory  authorities  may  approve  our  product  candidates  for  fewer  or  more  limited  indications  than  we
request, may grant approval contingent on the performance of costly post-marketing clinical trials, or may approve a product candidate with a label that does
not include the labeling claims necessary or desirable for the successful commercialization of that product candidate. Any of the foregoing scenarios could
materially harm the commercial prospects for our product candidates.

If we experience delays in obtaining approval or if we fail to obtain approval of our product candidates, the commercial prospects for our product candidates
may be harmed and our ability to generate revenues will be materially impaired.

Our  product  candidates  may  cause  undesirable  side  effects  that  could  delay  or  prevent  their  marketing  approval,  limit  the  commercial  profile  of  an
approved label, or result in significant negative consequences following marketing approval, if any.

Undesirable side effects caused by our product candidates could cause us or the FDA or other regulatory authorities to interrupt, delay or halt our clinical
trials  and  could  result  in  more  restrictive  labels  or  the  delay  or  denial  of  marketing  approval  by  the  FDA  or  other  regulatory  authorities  of  our  product
candidates. Results of our clinical trials could reveal a high and unacceptable severity and prevalence of these or other side effects. In such an event, our trials
could be suspended or terminated, and the FDA or comparable foreign regulatory authorities could order us to cease further development of or deny approval
of our product candidates for any or all targeted indications. In addition to this, the drug-related side effects could affect patient recruitment or the ability of
enrolled patients to complete the trial or result in potential product liability claims. Any of these occurrences may harm our business, financial condition and
prospects significantly.

Further, clinical trials by their nature utilize a sample of the potential patient population. With a limited number of patients, rare and severe side effects of our
product candidates may only be uncovered with a significantly larger number of patients exposed to the product candidate. If our product candidates receive
marketing approval and we or others identify undesirable side effects caused by such product candidates (or any other similar drugs) after such approval, a
number of potentially significant negative consequences could result, including:

regulatory authorities may withdraw or limit their approval of such product candidates;
regulatory authorities may require the addition of labeling statements, such as a “boxed” warning or a contraindication;

•
•
• we may be required to create a medication guide outlining the risks of such side effects for distribution to patients;
• we may be required to change the way such product candidates are distributed or administered, conduct additional clinical trials or change the

•

labeling of the product candidates;
regulatory authorities may require a Risk Evaluation and Mitigation Strategy plan to mitigate risks, which could include medication guides,
physician  communication  plans,  or  elements  to  assure  safe  use,  such  as  restricted  distribution  methods,  patient  registries  and  other  risk
minimization tools;

• we may be subject to regulatory investigations and government enforcement actions;
• we may decide to remove such product candidates from the marketplace after they are approved;
• we could be sued and held liable for injury caused to individuals exposed to or taking our product candidates; and
•

our reputation may suffer.

26

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
We  believe  that  any  of  these  events  could  prevent  us  from  achieving  or  maintaining  market  acceptance  of  the  affected  product  candidates  and  could
substantially increase the costs of commercializing our product candidates, if approved, and significantly impact our ability to successfully commercialize our
product candidates and generate revenues.

A Breakthrough Therapy Designation by the FDA, even if granted for any of our product candidates, may not lead to a faster development or regulatory
review or approval process, and does not increase the likelihood that our product candidates will receive marketing approval.

We  do  not  currently  have  Breakthrough  Therapy  Designation  for  any  of  our  product  candidates  but  may  seek  such  designation.  A  Breakthrough  Therapy
Designation may be granted to a drug that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or
condition, and for which preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or
more  clinically  significant  endpoints,  such  as  substantial  treatment  effects  observed  early  in  clinical  development.  For  drugs  that  have  been  designated  as
Breakthrough  Therapies,  interaction  and  communication  between  the  FDA  and  the  sponsor  can  help  to  identify  the  most  efficient  path  for  development.
Drugs designated as Breakthrough Therapies are also eligible for accelerated approval.

Designation as a Breakthrough Therapy is within the discretion of the FDA. Accordingly, even if we believe, after completing early clinical trials, that one of
our  product  candidates  meets  the  criteria  for  designation  as  a  Breakthrough  Therapy,  the  FDA  may  disagree  and  instead  determine  not  to  grant  such
designation. In any event, the receipt of a Breakthrough Therapy designation by itself for a product candidate may not result in a faster development process,
review or approval compared to drugs considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In
addition, even if one or more of our product candidates qualify as a Breakthrough Therapy, the FDA may later decide that such product candidates no longer
meet the conditions for qualification.

A Fast Track Designation by the FDA, even if granted for any of our product candidates, may not lead to a faster development or regulatory review or
approval process and does not increase the likelihood that our product candidates will receive marketing approval.

We do not currently have Fast Track Designation for any of our product candidates but may seek such designation. If a drug is intended for the treatment of a
serious or life-threatening condition and the drug demonstrates the potential to address unmet medical needs for this condition, the drug sponsor may apply
for FDA Fast Track Designation. The FDA has broad discretion whether to grant this designation. Even if we believe a particular product candidate is eligible
for this designation, we cannot assure you that the FDA would decide to grant it. Even if we do receive Fast Track Designation, we may not experience a
faster development process, review or approval compared to conventional FDA procedures. The FDA may withdraw Fast Track Designation if it believes that
the designation is no longer supported by data from our clinical development program. Many drugs that have received Fast Track Designation have failed to
obtain drug approval.

Any product candidate for which we obtain marketing approval will be subject to extensive post-marketing regulatory requirements and could be subject
to post-marketing restrictions or withdrawal from the market, and we may be subject to penalties if we fail to comply with regulatory requirements or if we
experience unanticipated problems with our products, when and if any of them are approved.

If the FDA or a comparable foreign regulatory authority approves any of our product candidates, activities such as the manufacturing processes, labeling,
packaging, distribution, adverse event reporting, storage, advertising, promotion and recordkeeping for the product will be subject to extensive and ongoing
regulatory requirements. The FDA or a comparable foreign regulatory authority may also impose requirements for costly post-marketing preclinical studies or
clinical trials and surveillance to monitor the safety or efficacy of the product. The FDA closely regulates the post-approval marketing and promotion of drugs
to ensure drugs are marketed only for the approved indications and in accordance with the provisions of the approved labeling. The FDA imposes stringent
restrictions on manufacturers’ communications regarding use of their products, and if we promote our products beyond their approved indications, we may be
subject to enforcement actions or prosecution arising from that off-label promotion. Violations of the Federal Food, Drug, and Cosmetic Act relating to the
promotion of prescription drugs may lead to investigations alleging violations of federal and state healthcare fraud and abuse and other laws, as well as state
consumer protection laws.

In addition, later discovery of previously unknown adverse events or other problems with our products, manufacturers or manufacturing processes, or failure
to comply with regulatory requirements, may yield various results, including:

restrictions on such products, manufacturers or manufacturing processes;
restrictions on the labeling or marketing of a product;
restrictions on product distribution or use;
requirements to conduct post-marketing studies or clinical trials;

•
•
•
•
• warning or untitled letters;

27

 
 
 
 
 
• withdrawal of the products from the market;
•
•
•
•
•
•
•

refusal to approve pending applications or supplements to approved applications that we submit;
recall of products;
fines, restitution or disgorgement of profits or revenues;
suspension or withdrawal of marketing approvals;
refusal to permit the import or export of our products;
product seizure; or
injunctions or the imposition of civil or criminal penalties.

Non-compliance  with  European  Union  requirements  regarding  safety  monitoring  or  pharmacovigilance  can  also  result  in  significant  financial  penalties.
Similarly, failure to comply with the European Union’s requirements regarding the protection of personal information can also lead to significant penalties
and sanctions.

The FDA’s policies may change and additional government regulations may be enacted that could prevent, limit or delay marketing approval of our product
candidates. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to
maintain regulatory compliance, we may lose any marketing approval that we may have obtained, which would adversely affect our business, prospects and
ability to achieve or sustain profitability.

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

Although  we  do  not  currently  have  any  drugs  on  the  market,  once  we  begin  commercializing  our  product  candidates,  we  will  be  subject  to  additional
healthcare statutory and regulatory requirements and enforcement by federal government and the states and foreign governments in the jurisdictions in which
we  conduct  our  business.  Healthcare  providers,  physicians  and  third-party  payors  will  play  a  primary  role  in  the  recommendation  and  prescription  of  any
product  candidates  for  which  we  obtain  marketing  approval.  Our  future  arrangements  with  third-party  payors  and  customers  may  expose  us  to  broadly
applicable  fraud  and  abuse  and  other  healthcare  laws  and  regulations  that  may  constrain  the  business  or  financial  arrangements  and  relationships  through
which we market, sell and distribute any products for which we obtain marketing approval. Restrictions under applicable federal and state healthcare laws and
regulations include the following:

•

•

•

•

the federal Anti-Kickback Statute prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or paying
remuneration,  directly  or  indirectly,  in  cash  or  in  kind,  to  induce  or  reward,  or  in  return  for,  either  the  referral  of  an  individual  for,  or  the
purchase,  order  or  recommendation  of,  any  good  or  service,  for  which  payment  may  be  made  under  a  federal  healthcare  program  such  as
Medicare and Medicaid; a person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have
committed a violation;
the federal false claims laws impose criminal and civil penalties, including civil whistleblower or qui tam actions, against individuals or entities
for knowingly presenting, or causing to be presented, to the federal government, claims for payment that are false or fraudulent or making a
false statement to avoid, decrease or conceal an obligation to pay money to the federal government; in addition, the government may assert that
a claim including items and services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for
purposes of the False Claims Act;
the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, imposes criminal and civil liability for executing a scheme
to  defraud  any  healthcare  benefit  program,  or  knowingly  and  willfully  falsifying,  concealing  or  covering  up  a  material  fact  or  making  any
materially false statement in connection with the delivery of or payment for healthcare benefits, items or services; similar to the federal Anti-
Kickback  Statute,  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;
the  federal  physician  payment  transparency  requirements,  sometimes  referred  to  as  the  “Sunshine  Act”  under  the  Patient  Protection  and
Affordable  Care  Act,  as  amended  by  the  Health  Care  and  Education  Reconciliation  Act  of  2010,  or  collectively  the  ACA,  require
manufacturers  of  drugs,  devices,  biologics  and  medical  supplies  that  are  reimbursable  under  Medicare,  Medicaid,  or  the  Children’s  Health
Insurance Program to report to the Centers for Medicare & Medicaid Services, or CMS, information related to payments and other transfers of
value to physicians and teaching hospitals and the ownership and investment interests of physicians and their immediate family members in
such manufacturers;

• HIPPA, as amended by the Health Information Technology for Economic and Clinical Health Act and its implementing regulations, which also
imposes  obligations  on  certain  covered  entity  healthcare  providers,  health  plans,  and  healthcare  clearinghouses  as  well  as  their  business
associates  that  perform  certain  services  involving  the  use  or  disclosure  of  individually  identifiable  health  information,  including  mandatory
contractual terms, with respect to safeguarding the privacy, security and transmission of individually identifiable health information;
analogous  state  and  foreign  laws  and  regulations,  such  as  state  anti-kickback  and  false  claims  laws,  may  apply  to  sales  or  marketing
arrangements and claims involving healthcare items or services reimbursed by non-governmental third-party payors, including private insurers;

•

28

 
 
 
 
 
 
 
 
 
 
 
 
 
 
•

•

some  state  laws  require  pharmaceutical  companies  to  comply  with  the  pharmaceutical  industry’s  voluntary  compliance  guidelines  and  the
relevant  compliance  guidance  promulgated  by  the  federal  government  and  may  require  drug  manufacturers  to  report  information  related  to
payments and other transfers of value to physicians and other healthcare providers or marketing expenditures; and
state  and  foreign  laws  also  govern  the  privacy  and  security  of  health  information  in  certain  circumstances,  many  of  which  differ  from  each
other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations will involve substantial costs.
It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law
involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other
governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, damages, fines, imprisonment,
exclusion of products from government funded healthcare programs, such as Medicare and Medicaid, and the curtailment or restructuring of our operations. If
any of the physicians or other healthcare providers or entities with whom we expect to do business is found to be not in compliance with applicable laws, they
may be subject to criminal, civil or administrative sanctions, including exclusions from government funded healthcare programs.

Current and future legislation may increase the difficulty and cost for us to obtain marketing approval of and commercialize our product candidates and
affect the prices we may obtain.

In  the  United  States  and  some  foreign  jurisdictions,  there  have  been  a  number  of  legislative  and  regulatory  changes  and  proposed  changes  regarding  the
healthcare system that could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability
to profitably sell any product candidates for which we obtain marketing approval.

In the United States, the Medicare Prescription Drug, Improvement, and Modernization Act of 2003, or the MMA, changed the way Medicare covers and
pays for pharmaceutical products. The legislation expanded Medicare coverage for drug purchases by the elderly and certain disabled people and introduced a
reimbursement methodology based on average sales prices for physician-administered drugs. In addition, this law provided authority for limiting the number
of drugs that will be covered in any therapeutic class. Cost reduction initiatives and other provisions of this law and future laws could decrease the coverage
and  price  that  we  will  receive  for  any  approved  products.  While  the  MMA  only  applies  to  drug  benefits  for  Medicare  beneficiaries,  private  payors  often
follow Medicare coverage policy and payment limitations in setting their own payment rates. Therefore, any limitations in reimbursement that results from
the MMA may result in reductions in payments from private payors.

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

Among the provisions of the ACA of importance to our potential product candidates are the following:

•
•
•

•

•
•
•
•
•
•

an annual, nondeductible fee on any entity that manufactures or imports specified branded prescription drugs and biologic products;
an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program;
expansion of healthcare fraud and abuse laws, including the False Claims Act and the Anti-Kickback Statute, new government investigative
powers, and enhanced penalties for noncompliance;
a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 50% point-of-sale discounts off negotiated
prices;
extension of manufacturers’ Medicaid rebate liability;
expansion of eligibility criteria for Medicaid programs;
expansion of the entities eligible for discounts under the Public Health Service Act’s pharmaceutical pricing program;
new requirements to report financial arrangements with physicians and teaching hospitals;
a new requirement to annually report drug samples that manufacturers and distributors provide to physicians; and
a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research,
along with funding for such research.

The  current  administration  supports  a  repeal  of  the  ACA  and  an  Executive  Order  has  been  signed  commanding  federal  agencies  to  try  to  waive  or  delay
requirements  of  the  ACA  that  impose  economic  or  regulatory  burdens  on  states,  families,  the  health-care  industry  and  others.  The  Executive  Order  also
declares that the administration will seek the “prompt repeal” of the law and that the government should prepare to “afford the States more flexibility and
control to create a more free and open healthcare market.” At this time, the immediate impact of the Executive Order is not clear. In addition, other legislative
changes have been proposed and adopted since the ACA was enacted. These new laws may result in additional reductions in Medicare and other healthcare
funding.

29

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

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

Our future growth may depend, in part, on our ability to penetrate foreign markets, where we would be subject to additional regulatory burdens and other
risks and uncertainties.

Our  future  profitability  may  depend,  in  part,  on  our  ability  to  commercialize  our  product  candidates  in  foreign  markets.  In  order  to  market  and  sell  our
products in the European Union and many other jurisdictions, we or our third-party collaborators must obtain separate marketing approvals and comply with
numerous and varying regulatory requirements. The approval procedure varies among countries and economic areas and can involve additional testing. The
time  required  to  obtain  approval  may  differ  substantially  from  that  required  to  obtain  FDA  approval.  The  marketing  approval  process  outside  the  United
States generally includes all of the risks associated with obtaining FDA approval. In addition, in many countries outside the United States, it is required that
the product be approved for reimbursement before the product can be approved for sale in that country. We or these third parties may not obtain approvals
from regulatory authorities outside the United States on a timely basis, if at all. Approval by FDA does not ensure approval by regulatory authorities in other
countries  or  jurisdictions,  and  approval  by  one  regulatory  authority  outside  the  United  States  does  not  ensure  approval  by  regulatory  authorities  in  other
countries or jurisdictions or by FDA. Additionally, a failure or delay in obtaining marketing approval in one jurisdiction may have a negative effect on the
marketing  approval  process  in  others.  Approval  procedures  vary  among  jurisdictions  and  can  involve  requirements  and  administrative  review  periods
different from, and greater than, those in the United States, including additional preclinical studies or clinical trials. Obtaining foreign marketing approvals
and compliance with foreign regulatory requirements could result in significant delays, difficulties and costs for us and could delay or prevent the introduction
of  our  products  in  certain  countries.  If  we  fail  to  comply  with  the  regulatory  requirements  in  international  markets  and/or  receive  applicable  marketing
approvals, our target market will be reduced and our ability to realize the full market potential of our product candidates will be harmed.

We  may  not  be  able  to  file  for  marketing  approvals  and  may  not  receive  necessary  approvals  to  commercialize  our  products  in  any  market.  If  we  obtain
approval  of  our  product  candidates  and  ultimately  commercialize  our  product  candidates  in  foreign  markets,  we  would  be  subject  to  additional  risks  and
uncertainties, including:

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our customers’ ability to obtain reimbursement for our product candidates in foreign markets;
our inability to directly control commercial activities because we are relying on third parties;
the burden of complying with complex and changing foreign regulatory, tax, accounting and legal requirements;
different medical practices and customs in foreign countries affecting acceptance in the marketplace;
import or export licensing requirements;
longer accounts receivable collection times;
longer lead times for shipping;
language barriers for technical training;
reduced or no protection on pharmaceutical products or their use in some foreign countries;
the unwillingness of courts in some foreign jurisdictions to enforce patents even when valid and infringed in that country;
the possibility of pre-grant or post-grant review proceedings in certain foreign countries that allow a petitioner to hold up patent rights for an
extended period or permanently by challenging the patent filing at the patent office of that country;
the possibility of a compulsory license issued by a foreign country that allows a third-party company or a government to manufacture, use or
sell our products with a government-set low royalty to us;
the existence of additional potentially relevant third-party intellectual property rights;
foreign currency exchange rate fluctuations; and
the interpretation of contractual provisions governed by foreign laws in the event of a contract dispute.

Foreign sales of our product candidates could also be adversely affected by the imposition of governmental controls, political and economic instability, trade
restrictions and changes in tariffs.

Governments outside the United States tend to impose strict price controls, which may adversely affect our revenues, if any.

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

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could
harm our business.

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

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

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or
future laws and regulations may impair our discovery, preclinical development or production efforts. Our failure to comply with these laws and regulations
also may result in substantial fines, penalties or other sanctions.

Risks related to our dependence on third parties

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

We do not have the ability to independently conduct clinical trials. We rely on medical institutions, clinical investigators, contract laboratories and other third
parties, such as CROs, to conduct or otherwise support clinical trials for our product candidates. We expect to rely heavily on these parties for performance of
clinical trials for our product candidates. Nevertheless, we will be responsible for ensuring that each of our clinical trials is conducted in accordance with the
applicable protocol, legal and regulatory requirements and scientific standards.

We, our investigators, and our CROs will be required to comply with regulations, including good clinical practice, or GCP, and other related requirements for
conducting, monitoring, recording and reporting the results of clinical trials to ensure that the data and results are scientifically credible and accurate, and that
the trial patients are adequately informed of the potential risks of participating in clinical trials and their rights are protected. These regulations are enforced
by the FDA, the Competent Authorities of the Member States of the European Economic Area and comparable foreign regulatory authorities for any drugs in
clinical  development.  The  FDA  enforces  GCPs  through  periodic  inspections  of  clinical  trial  sponsors,  principal  investigators  and  trial  sites.  If  we,  our
investigators or our CROs fail to comply with applicable GCPs, the clinical data generated in our clinical trials may be called into question and the FDA or
comparable foreign regulatory authorities may require us to perform additional clinical trials before considering our marketing applications for approval. We
cannot assure you that, upon inspection, the FDA will determine that any of our future clinical trials will comply with GCPs.

In addition, our clinical trials must be conducted with product candidates produced under cGMPs. Our failure or the failure of our investigators or CROs to
comply  with  these  requirements  may  require  us  to  repeat  clinical  trials,  which  would  delay  the  marketing  approval  process  and  could  also  subject  us  to
enforcement action. We also are required to register certain clinical trials and post the results of such completed clinical trials involving product candidates for
which we receive marketing approval on a government-sponsored database, ClinicalTrials.gov, within certain timeframes. Failure to do so can result in fines,
adverse publicity and civil and criminal sanctions.

Although we intend to design the clinical trials for our product candidates, CROs will administer all of the clinical trials. As a result, many important aspects
of our development programs, including their conduct and timing, will be outside of our direct control. Our

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reliance on third parties to conduct future clinical trials will also result in less direct control over the management of data developed through clinical trials
than would be the case if we were relying entirely upon our own staff. Communicating with outside parties can also be challenging, potentially leading to
mistakes as well as difficulties in coordinating activities. Outside parties may:

have staffing difficulties;
fail to comply with contractual obligations;
experience regulatory compliance issues;
undergo changes in priorities or become financially distressed;

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form relationships with other entities, some of which may be our competitors.

These factors may materially adversely affect the willingness or ability of third parties to conduct our clinical trials and may subject us to unexpected cost
increases that are beyond our control. If the CROs do not perform clinical trials in a satisfactory manner, breach their obligations to us or fail to comply with
regulatory  requirements,  the  development,  marketing  approval  and  commercialization  of  our  product  candidates  may  be  delayed,  we  may  not  be  able  to
obtain  marketing  approval  and  commercialize  our  product  candidates,  or  our  development  program  may  be  materially  and  irreversibly  harmed.  If  we  are
unable to rely on clinical data collected by our CROs, we could be required to repeat, extend the duration of, or increase the size of any clinical trials we
conduct, and this could significantly delay commercialization and require significantly greater expenditures.

If  any  of  our  relationships  with  these  third-party  CROs  terminate,  we  may  not  be  able  to  enter  into  arrangements  with  alternative  CROs.  If  CROs  do  not
successfully carry out their contractual duties or obligations or meet expected deadlines, if they need to be replaced or if the quality or accuracy of the clinical
data they obtain is compromised due to the failure to adhere to our clinical protocols, regulatory requirements or for other reasons, any clinical trials such
CROs are associated with may be extended, delayed or terminated, and we may not be able to obtain marketing approval for or successfully commercialize
our product candidates. As a result, we believe that our financial results and the commercial prospects for our product candidates in the subject indication
would be harmed, our costs could increase and our ability to generate revenue could be delayed.

We contract with third parties for the manufacture of our product candidates for preclinical studies and clinical trials and expect to continue to do so for
commercialization. This reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates or drugs or such
quantities at an acceptable cost, which could delay, prevent or impair our development or commercialization efforts.

We do not currently own or operate, nor do we have any plans to establish in the future, any manufacturing facilities or personnel. We rely, and expect to
continue  to  rely,  on  third  parties  for  the  manufacture  of  our  product  candidates  for  preclinical  studies  and  clinical  trials,  as  well  as  for  the  commercial
manufacture of our drugs if any of our product candidates receive marketing approval. This reliance on third parties increases the risk that we will not have
sufficient  quantities  of  our  product  candidates  or  drugs  or  such  quantities  at  an  acceptable  cost  or  quality,  which  could  delay,  prevent  or  impair  our
development or commercialization efforts.

The facilities used to manufacture our product candidates must be evaluated by the FDA pursuant to inspections that will be conducted after we submit our
marketing applications to the FDA to ensure compliance with cGMP. We do not control the manufacturing process of, and will be completely dependent on,
our contract manufacturers for compliance with cGMPs in connection with the manufacture of our product candidates. If our contract manufacturers cannot
successfully manufacture material that conforms to our specifications and the regulatory requirements of the FDA or others, we will not be able to use the
products produced at their manufacturing facilities. In addition, we have no control over the ability of our contract manufacturers to maintain adequate quality
control,  quality  assurance  and  qualified  personnel.  If  the  FDA  or  a  comparable  foreign  regulatory  authority  finds  that  these  facilities  do  not  comply  with
cGMP, we may need to find alternative manufacturing facilities, which would significantly impact our ability to develop, obtain marketing approval for or
market  our  product  candidates,  if  approved.  Further,  our  failure,  or  the  failure  of  our  third  party  manufacturers,  to  comply  with  these  or  other  applicable
regulations  could  result  in  sanctions  being  imposed  on  us,  including  clinical  holds,  fines,  injunctions,  civil  penalties,  delays,  suspension  or  withdrawal  of
approvals, license revocation, seizures or recalls of product candidates or drugs, if approved, operating restrictions and criminal prosecutions, any of which
could significantly and adversely affect our business and supplies of our product candidates.

We may be unable to establish any agreements with third-party manufacturers or do so on acceptable terms. Even if we are able to establish agreements with
third party manufacturers, reliance on third party manufacturers entails additional risks, including:

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reliance on the third party for regulatory compliance and quality assurance;
the possible breach of the manufacturing agreement by the third party;
the possible misappropriation of our proprietary information, including our trade secrets and know-how; and
the possible termination or nonrenewal of the agreement by the third party at a time that is costly or inconvenient for us.

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Our product candidates and any other drugs that we may develop may compete with other product candidates and approved drugs for access to manufacturing
facilities. There are a limited number of manufacturers that operate under cGMP regulations and that might be capable of manufacturing for us.

Any performance failure on the part of our existing or future manufacturers could delay clinical development or marketing approval. If our current contract
manufacturers cannot perform as agreed, we may be required to replace such manufacturers. Although we believe that there are several potential alternative
manufacturers who could manufacture our product candidates, we may incur added costs and delays in identifying and qualifying any such replacement.

Our  current  and  anticipated  future  dependence  upon  others  for  the  manufacture  of  our  product  candidates  or  drugs  may  adversely  affect  our  future  profit
margins and our ability to commercialize any drugs that receive marketing approval on a timely and competitive basis.

We, or our third-party manufacturers, may be unable to successfully scale-up manufacturing of our product candidates in sufficient quality and quantity,
which would delay or prevent us from developing our product candidates and commercializing approved products, if any.

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

The third parties upon which we rely for the supply of the active pharmaceutical ingredients, formulations, and drug products are our sole sources of
supply and have limited capacity, and the loss of any of these suppliers could harm our business.

Some active pharmaceutical ingredients, or APIs, and drug products for our product candidates are supplied to us from single source suppliers with limited
capacity. Our ability to successfully develop our product candidates, and to ultimately supply our commercial drugs in quantities sufficient to meet the market
demand, depends in part on our ability to obtain the APIs and drug products in accordance with cGMP requirements and in sufficient quantities for clinical
trials  and  commercialization.      It  is  possible  that  our  suppliers  of  API  or  drug  product  which  are  not  dual-sourced  could,  for  any  reason,  cease  their
operations.  

We  do  not  know  whether  our  suppliers  will  be  able  to  meet  our  demand,  either  because  of  the  nature  of  our  agreements  with  those  suppliers,  our  limited
experience with those suppliers or our relative importance as a customer to those suppliers. It may be difficult for us to assess their ability to timely meet our
demand in the future based on past performance. While our suppliers have generally met our demand for their products on a timely basis in the past, they may
subordinate our needs in the future to their other customers.

For all of our product candidates, we intend to identify and qualify additional manufacturers to provide API and drug products prior to submission of an NDA
to the FDA and/or an MAA to the EMA. Establishing additional or replacement suppliers for APIs and drug products for our product candidates, if required,
may not be accomplished quickly. If we are able to find a replacement supplier, such replacement supplier would need to be qualified, or we may have to
perform comparative studies comparing the drug product from a new manufacturer to the product used in any completed clinical trials. All of this may require
additional regulatory approval, which could result in further delay. While we seek to maintain adequate inventory of APIs and drug product for our product
candidates, any interruption or delay in the supply of components or materials, or our inability to obtain such APIs and drug product from alternate sources at
acceptable prices in a timely manner could impede, delay, limit or prevent our development efforts, which could harm our business, results of operations,
financial condition and prospects.

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

Our drug development programs and the potential commercialization of our product candidates will require substantial additional cash to fund expenses. For
some  of  our  product  candidates,  we  may  decide  to  collaborate  with  pharmaceutical  and  biotechnology  companies  for  the  development  and  potential
commercialization of those product candidates.

We face significant competition in seeking appropriate collaborators. Whether we reach a definitive agreement for a collaboration will depend, among other
things,  upon  our  assessment  of  the  collaborator’s  resources  and  expertise,  the  terms  and  conditions  of  the  proposed  collaboration  and  the  proposed
collaborator’s evaluation of a number of factors. Those factors may include the design or results of clinical trials, the likelihood of approval by the FDA or
similar regulatory authorities outside the United States, the potential market for the subject product candidate, the costs and complexities of manufacturing
and delivering such product candidate to

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patients, the potential of competing drugs and market conditions generally. The proposed collaborator  may  also  consider  alternative  product  candidates  or
technologies for similar indications that may be available to collaborate on and whether such a collaboration could be more attractive than the one with us for
our product candidate. The terms of any collaborations or other arrangements that we may establish may not be favorable to us.

We  may  also  be  restricted  under  existing  collaboration  agreements  from  entering  into  future  agreements  on  certain  terms  with  potential  collaborators.
Collaborations  are  complex  and  time-consuming  to  negotiate  and  document.  In  addition,  there  have  been  a  significant  number  of  recent  business
combinations among large pharmaceutical companies that have resulted in a reduced number of potential future collaborators.

We  may  not  be  able  to  negotiate  collaborations  on  a  timely  basis,  on  acceptable  terms,  or  at  all.  If  we  are  unable  to  do  so,  we  may  have  to  curtail  the
development  of  the  product  candidate  for  which  we  are  seeking  to  collaborate,  reduce  or  delay  its  development  program  or  one  or  more  of  our  other
development  programs,  delay  its  potential  commercialization  or  reduce  the  scope  of  any  sales  or  marketing  activities,  or  increase  our  expenditures  and
undertake  development  or  commercialization  activities  at  our  own  expense.  If  we  elect  to  increase  our  expenditures  to  fund  development  or
commercialization activities on our own, we may need to obtain additional capital, which may not be available to us on acceptable terms or at all. If we do not
have sufficient funds, we may not be able to further develop our product candidates or bring them to market and generate drug revenue.

In addition, any collaboration that we enter into may not be successful. The success of our collaboration arrangements will depend heavily on the efforts and
activities  of  our  collaborators.  Collaborators  generally  have  significant  discretion  in  determining  the  efforts  and  resources  that  they  will  apply  to  these
collaborations.  Any  such  collaboration  may  require  us  to  incur  non-recurring  or  other  charges,  increase  our  near-  and  long-term  expenditures  and  pose
significant  integration  or  implementation  challenges  or  disrupt  our  management  or  business.  These  transactions  would  entail  numerous  operational  and
financial risks, including exposure to unknown liabilities, disruption of our business and diversion of our management’s time and attention in order to manage
a  collaboration,  incurrence  of  substantial  debt  or  dilutive  issuances  of  equity  securities  to  pay  transaction  consideration  or  costs,  higher  than  expected
collaboration  or  integration  costs,  write-down  of  assets  or  goodwill  or  impairment  charges,  increased  amortization  expenses  and  difficulty  and  cost  in
facilitating the collaboration.

Lastly, disagreements between parties to a collaboration arrangement regarding clinical development and commercialization matters can lead to delays in the
development  process  or  commercializing  the  applicable  product  candidate  and,  in  some  cases,  termination  of  the  collaboration  arrangement.  These
disagreements can be difficult to resolve if neither of the parties has final decision-making authority. Collaborations with pharmaceutical or biotechnology
companies and other third parties often are terminated or allowed to expire by the other party. Any such termination or expiration would adversely affect us
financially and could harm our business reputation.

Risks related to the commercialization of our product candidates

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

If any of our product candidates receives marketing approval, it may nonetheless fail to gain sufficient market acceptance by physicians, patients, third-party
payors  and  others  in  the  medical  community.  If  our  product  candidates  do  not  achieve  an  adequate  level  of  acceptance,  we  may  not  generate  significant
product  revenues  and  we  may  not  become  profitable.  The  degree  of  market  acceptance  of  our  product  candidates,  if  approved  for  commercial  sale,  will
depend on a number of factors, including:

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the timing of our receipt of any marketing approvals;
the terms of any approvals and the countries in which approvals are obtained;
the efficacy and safety and potential advantages and disadvantages compared to alternative treatments;
the prevalence and severity of any side effects associated with our products;
the indications for which our products are approved;
adverse publicity about our products or favorable publicity about competing products;
the approval of other products for the same indications as our products;
our ability to offer our products for sale at competitive prices;
the convenience and ease of administration compared to alternative treatments;
the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies;
the success of our physician education programs;
the strength of our marketing and distribution support;
the availability of third-party coverage and adequate reimbursement, including patient cost-sharing programs such as copays and deductibles;
and
any restrictions on the use of our products together with other medications.

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If any product we commercialize fails to achieve market acceptance, it could have a material and adverse effect on our business, financial condition, results of
operation and prospects.

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

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

Specifically, there are a large number of companies developing or marketing treatments for cancer, including many major pharmaceutical and biotechnology
companies. If trilaciclib is approved, it would compete with (a) existing growth factor support treatments, (b) if approved, rovalpituzumab tesirine (Rova-T),
an antibody drug conjugate currently being developed by AbbVie for the treatment of patients with SCLC, (c) if approved, the multiple immune checkpoint
inhibitors in clinical trials for the treatment of patients with SCLC and TNBC, and (d) multiple approved drugs or drugs that may be approved in the future
for  indications  for  which  we  may  develop  trilaciclib.  If  G1T38  is  approved,  it  would  compete  with  (a)  Pfizer’s  approved  CDK4/6  inhibitor,  Ibrance,  (b)
Novartis’s approved CDK4/6 inhibitor, Kisqali, (c) Eli Lilly’s approved CDK4/6 inhibitor, Verzenio, (d) if approved, other non-selective CDK4/6 inhibitor
product  candidates  in  clinical  development,  including  product  candidates  being  developed  by  FLX  Bio  and  OncoMed  Pharmaceuticals,  and  (e)  multiple
approved drugs or drugs that may be approved in the future for indications for which we may develop G1T38. If G1T48 is approved, it would compete with
(a)  the  approved  intramuscular  SERD,  Faslodex,  being  marketed  by  AstraZeneca,  (b)  if  approved,  other  oral  SERDs  in  development  by  Radius  Health,
Genentech, AstraZeneca and Novartis; and (c) multiple approved drugs or drugs that may be approved in the future for indications for which we may develop
G1T48.

Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer
or less severe side effects, are more convenient or are less expensive than any products that we may develop. Our competitors also may obtain FDA or other
marketing approval for their products more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market
position before we are able to enter the market and/or slow our marketing approval. Some of the important competitive factors affecting the success of all of
our  product  candidates,  if  approved,  are  likely  to  be  their  efficacy,  safety,  convenience,  price  and  the  availability  of  reimbursement  from  government  and
other third-party payors.

Many of the companies against which we are competing or against which we may compete in the future have significantly greater financial resources and
expertise in research and development, manufacturing, preclinical studies, conducting clinical trials, obtaining marketing approvals and marketing approved
products  than  we  do.  Mergers  and  acquisitions  in  the  pharmaceutical  and  biotechnology  industries  may  result  in  even  more  resources  being  concentrated
among  a  smaller  number  of  our  competitors.  Smaller  and  early-stage  companies  may  also  prove  to  be  significant  competitors,  particularly  through
collaborative  arrangements  with  large  and  established  companies.  These  third  parties  compete  with  us  in  recruiting  and  retaining  qualified  scientific  and
management personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or
necessary for, our programs.

Even if we are able to commercialize any product candidates, such drugs may become subject to unfavorable pricing regulations or third-party coverage
and reimbursement policies, which would harm our business.

The  regulations  that  govern  marketing  approvals,  pricing  and  reimbursement  for  new  drugs  vary  widely  from  country  to  country.  Some  countries  require
approval of the sale price of a drug before it can be marketed. In many countries, the pricing review period begins after marketing approval is granted. In
some  foreign  markets,  prescription  pharmaceutical  pricing  remains  subject  to  continuing  governmental  control  even  after  initial  approval  is  granted.  As  a
result, we might obtain marketing approval for a product candidate in a particular country, but then be subject to price regulations that delay our commercial
launch of the product candidate, possibly for lengthy time periods, and negatively impact the revenues we are able to generate from the sale of the product
candidate in that country. Adverse pricing limitations may hinder our ability to recoup our investment in one or more product candidates, even if our product
candidates obtain marketing approval.

Our  ability  to  commercialize  any  product  candidates  successfully  also  will  depend  in  part  on  the  extent  to  which  coverage  and  reimbursement  for  these
product candidates and related treatments will be available from government authorities, private health

35

insurers and other organizations. In the United States, the principal decisions about reimbursement for new medicines are typically made by the CMS, an
agency  within  the  U.S.  Department  of  Health  and  Human  Services,  as  CMS  decides  whether  and  to  what  extent  a  new  medicine  will  be  covered  and
reimbursed  under  Medicare.  Private  payors  tend  to  follow  CMS  to  a  substantial  degree.  It  is  difficult  to  predict  what  CMS  will  decide  with  respect  to
reimbursement. Reimbursement agencies in Europe may be more conservative than CMS. For example, a number of cancer drugs are generally covered and
paid for in the United States, but have not been approved for reimbursement in certain European countries. A primary trend in the U.S. healthcare industry
and elsewhere is cost containment. Government authorities and third-party payors have attempted to control costs by limiting coverage and the amount of
payments for particular drugs. Increasingly, third-party payors are requiring that drug companies provide them with predetermined discounts from list prices
and are challenging the prices charged for drugs. We cannot be sure that coverage will be available for any product candidate that we commercialize and, if
coverage  is  available,  the  level  of  payments.  Reimbursement  may  impact  the  demand  for,  or  the  price  of,  any  product  candidate  for  which  we  obtain
marketing approval. If reimbursement is not available or is available only to limited levels, we may not be able to successfully commercialize any product
candidate for which we obtain marketing approval.

In addition to CMS and private payors, professional organizations such as the National Comprehensive Cancer Network and the American Society of Clinical
Oncology can influence decisions about reimbursement for new medicines by determining standards of care. In addition, many private payors contract with
commercial vendors who sell software that provide guidelines that attempt to limit utilization of, and therefore reimbursement for, certain products deemed to
provide limited benefit to existing alternatives. Such organizations may set guidelines that limit reimbursement or utilization of our products.

There may be significant delays in obtaining reimbursement for newly approved drugs, and coverage may be more limited than the purposes for which the
drug is approved by the FDA or similar regulatory authorities outside the United States. Moreover, eligibility for reimbursement does not imply that any drug
will  be  paid  for  in  all  cases  or  at  a  rate  that  covers  our  costs,  including  research,  development,  manufacture,  sale  and  distribution.  Interim  reimbursement
levels for new drugs, if applicable, may also not be sufficient to cover our costs and may not be made permanent. Reimbursement rates may vary according to
the use of the drug and the clinical setting in which it is used, may be based on reimbursement levels already set for lower cost drugs and may be incorporated
into  existing  payments  for  other  services.  Net  prices  for  drugs  may  be  reduced  by  mandatory  discounts  or  rebates  required  by  government  healthcare
programs or private payors and by any future relaxation of laws that presently restrict imports of drugs from countries where they may be sold at lower prices
than in the United States. Our inability to promptly obtain coverage and profitable payment rates from both government-funded and private payors for any
approved drugs that we develop could have a material adverse effect on our operating results, our ability to raise capital needed to commercialize drugs and
our overall financial condition.

We currently have no marketing and sales force. If we are unable to establish effective sales or marketing capabilities or enter into agreements with third
parties to sell or market our product candidates, we may not be able to effectively sell or market our product candidates, if approved, or generate product
revenues.

We  do  not  currently  have  a  sales  or  marketing  infrastructure  and  have  limited  experience  in  the  sale,  marketing  or  distribution  of  drugs.  To  achieve
commercial  success  for  any  approved  product  candidate  for  which  we  retain  sales  and  marketing  responsibilities,  we  must  build  our  sales,  marketing,
managerial,  and  other  non-technical  capabilities  or  make  arrangements  with  third  parties  to  perform  these  services.  There  are  risks  involved  with  both
establishing our own sales and marketing capabilities and entering into arrangements with third parties to perform these services. For example, recruiting and
training a sales force is expensive and time consuming and could delay any drug launch. If the commercial launch of a product candidate for which we recruit
a sales force and establish marketing capabilities is delayed or does not occur for any reason, we would have prematurely or unnecessarily incurred these
commercialization expenses. This may be costly, and our investment would be lost if we cannot retain or reposition our sales and marketing personnel.

Factors that may inhibit our efforts to commercialize our product candidates on our own include:

•
•
•

•

our inability to recruit and retain adequate numbers of effective sales and marketing personnel;
the inability of sales personnel to obtain access to physicians or persuade adequate numbers of physicians to prescribe any future drugs;
the lack of complementary drugs to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies with
more extensive product lines; and
unforeseen costs and expenses associated with creating an independent sales and marketing organization.

If  we  enter  into  arrangements  with  third  parties  to  perform  sales,  marketing  and  distribution  services,  our  drug  revenues  or  the  profitability  of  these  drug
revenues  to  us  are  likely  to  be  lower  than  if  we  were  to  market  and  sell  any  product  candidates  that  we  develop  ourselves.  In  addition,  we  may  not  be
successful in entering into arrangements with third parties to sell and market our product candidates or may be unable to do so when needed or on terms that
are favorable to us. We likely will have little control over such third parties, and any of them may fail to devote the necessary resources and attention to sell
and market our product candidates

36

 
 
 
 
effectively.  If  we  do  not  establish  sales  and  marketing  capabilities  successfully,  either  on  our  own  or  in  collaboration  with  third  parties,  we  will  not  be
successful in commercializing our product candidates that receive marketing approval or any such commercialization may experience delays or limitations. If
we are not successful in commercializing our product candidates, either on our own or through collaborations with one or more third parties, our business,
results of operations, financial condition and prospects will be materially adversely affected.

Product liability lawsuits against us could cause us to incur substantial liabilities and to limit commercialization of any products that we may develop.

We face an inherent risk of product liability exposure related to the evaluation of our product candidates in human clinical trials and will face an even greater
risk  if  we  commercially  sell  any  products  that  we  may  develop.  If  we  cannot  successfully  defend  ourselves  against  claims  that  our  product  candidates  or
products caused injuries, we will incur substantial liabilities. Regardless of merit or eventual outcome, liability claims may result in:

decreased demand for any product candidates or products that we may develop;
injury to our reputation and significant negative media attention;

•
•
• withdrawal of clinical trial participants;
•
•
•
•
•

significant costs to defend the related litigation;
substantial monetary awards to trial participants or patients;
loss of revenue;
reduced resources of our management to pursue our business strategy; and
the inability to successfully commercialize any products that we may develop.

We currently hold $10.0 million in product liability insurance coverage in the aggregate, with a per incident limit of $10.0 million, which may not be adequate
to  cover  all  liabilities  that  we  may  incur.  We  may  need  to  increase  our  insurance  coverage  as  we  expand  our  clinical  trials  or  if  we  commence
commercialization  of  our  product  candidates.  Insurance  coverage  is  increasingly  expensive.  We  may  not  be  able  to  maintain  insurance  coverage  at  a
reasonable cost or in an amount adequate to satisfy any liability that may arise.

Risks related to our intellectual property

If  we  are  unable  to  obtain  and  maintain  intellectual  property  protection  for  our  technology  and  products,  or  if  the  scope  of  the  intellectual  property
protection obtained is not sufficiently broad, our competitors could commercialize technology and products similar or identical to ours, and our ability to
successfully commercialize our technology and products may be impaired and, if we infringe the valid patent rights of others, we may be prevented from
making, using or selling our products or may be subject to damages or penalties.

Our success depends in large part on our ability to obtain and maintain patents in the United States and other countries that adequately protect our proprietary
technology and products. We seek to protect our proprietary position by filing patent applications in the United States and in foreign countries that cover our
novel product candidates and their uses, pharmaceutical formulations and dosages, and processes for the manufacture of them. Our patent portfolio currently
includes both patents and patent applications.

The patent prosecution process is expensive and time-consuming. We may not be able to file and prosecute all necessary or desirable patent applications at a
reasonable cost or in a timely manner. We may choose not to seek patent protection for certain innovations and may choose not to pursue patent protection in
certain  jurisdictions.  Under  the  laws  of  certain  jurisdictions,  patents  or  other  intellectual  property  rights  may  be  unavailable  or  limited  in  scope.  It  is  also
possible that we will fail to identify patentable aspects of our research and development before it is too late to obtain patent protection.

We currently solely own or exclusively license our patents and patent applications and we have the right to control the prosecution of the in-licensed patent
applications. In the future, we may choose to in-license additional patents or patent applications from third parties that we conclude are useful or necessary for
our business goals. We may not have the right to control the preparation, filing, prosecution or maintenance of such patent applications. Therefore, if we do
license additional patents or patent applications in the future, these patents and applications may not be prosecuted and enforced in a manner consistent with
the best interests of our business.

The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and has in
recent  years  been  the  subject  of  much  litigation.  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 18 months after filing, or in some cases not at all. Therefore, we
cannot know with certainty whether we were the first to make the inventions claimed in our owned or licensed patents or pending patent applications, or that
we were the first to file for patent protection of such inventions. As a result, the issuance, scope, validity, enforceability and commercial value of our patent
rights are highly uncertain. Our pending and future patent applications may not result in patents being issued which protect our technology or

37

 
 
 
 
 
 
 
 
products, in whole or in part, or which effectively prevent others from commercializing competitive technologies and products. Changes in either the patent
laws or interpretation of the patent laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent
protection.

Recent  patent  reform  legislation  could  increase  the  uncertainties  and  costs  surrounding  the  prosecution  of  our  patent  applications  and  the  enforcement  or
defense of our issued patents. On September 16, 2011, the Leahy-Smith America Invents Act, or the Leahy-Smith Act, was signed into law. The Leahy-Smith
Act includes a number of significant changes to U.S. patent law. These include provisions that affect the way patent applications are prosecuted and may also
affect patent litigation. The U.S. Patent and Trademark Office, or U.S. PTO, recently developed new regulations and procedures to govern administration of
the Leahy-Smith Act, and many of the substantive changes to patent law associated with the Leahy-Smith Act, and in particular, the first to file provisions,
became effective on March 16, 2013. The Leahy-Smith Act also created certain new administrative adversarial proceedings, discussed below. It is not clear
what, if any, impact the Leahy-Smith Act will have on the operation of our business. However, the Leahy-Smith Act and its implementation could increase
the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could
have a material adverse effect on our business and financial condition.

The U.S. Supreme Court has issued opinions in patent cases in the last few years that many consider may weaken patent protection in the United States, either
by  narrowing  the  scope  of  patent  protection  available  in  certain  circumstances,  holding  that  certain  kinds  of  innovations  are  not  patentable  or  generally
otherwise making it easier to invalidate patents in court. Additionally, there have been recent proposals for additional changes to the patent laws of the United
States and other countries that, if adopted, could impact our ability to obtain patent protection for our proprietary technology or our ability to enforce our
proprietary  technology.  Depending  on  future  actions  by  the  U.S.  Congress,  the  U.S.  courts,  the  U.S.  PTO  and  the  relevant  law-making  bodies  in  other
countries, the laws and regulations governing patents could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce
our existing patents and patents that we might obtain in the future.

Even if our patent applications issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors from
competing with us or otherwise provide us with any competitive advantage. Our competitors may be able to circumvent our owned or licensed patents by
developing similar or alternative technologies or products in a non-infringing manner.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our owned and licensed patents may be challenged in the
courts  or  patent  offices  in  the  United  States  and  in  other  countries.  Such  challenges  may  result  in  loss  of  exclusivity  or  in  patent  claims  being  narrowed,
invalidated  or  held  unenforceable,  in  whole  or  in  part,  which  could  limit  our  ability  to  stop  others  from  using  or  commercializing  similar  or  identical
technology  and  products,  or  limit  the  duration  of  the  patent  protection  of  our  technology  and  products.  Given  the  amount  of  time  required  for  the
development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates
are commercialized. As a result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from commercializing
products similar or identical to ours. Likewise, a court could uphold and enforce a third-party patent that it rules we have infringed, which would subject us to
damages or prevent us from making, using or selling our products.

During patent prosecution in the United States and in most foreign countries, a third party can submit prior art or arguments to the reviewing patent office to
attempt to prevent the issuance of a competitor’s patent. For example, our pending patent applications may be subject to a third-party pre-issuance submission
of prior art to the U.S. PTO or an Observation in Europe. Such submission may convince the receiving patent office not to issue the patent. In addition, if the
breadth or strength of protection provided by our patents and patent applications is reduced by such third-party submission, it could affect the value of our
resulting patent or dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates.

The risks described here pertaining to our patents and other intellectual property rights also apply to any intellectual property rights that we may license in the
future, and any failure to obtain, maintain and enforce these rights could have a material adverse effect on our business. In some cases, we may not have
control  over  the  prosecution,  maintenance  or  enforcement  of  the  patents  that  we  license,  and  our  licensors  may  fail  to  take  the  steps  that  we  believe  are
necessary or desirable in order to obtain, maintain and enforce the licensed patents. Any inability on our part to adequately protect or defend our intellectual
property may have a material adverse effect on our business, operating results and financial position.

Some  intellectual  property  may  have  been  discovered  through  government  funded  programs  and  thus  may  be  subject  to  federal  regulations  such  as
“march-in” rights, certain reporting requirements and a preference for U.S.-based companies. Compliance with such regulations may limit our exclusive
rights, and limit our ability to contract with non-U.S. manufacturers.

Many of our intellectual property rights were generated through the use of U.S. government funding and are therefore subject to certain federal regulations.
As a result, the U.S. government may have certain rights to intellectual property embodied in our current or future product candidates pursuant to the Bayh-
Dole  Act  of  1980,  or  Bayh-Dole  Act.  These  U.S.  government  rights  in  certain  inventions  developed  under  a  government-funded  program  include  a  non-
exclusive, non-transferable, irrevocable worldwide license to

38

use  inventions  for  any  governmental  purpose.  In  addition,  the  U.S.  government  has  the  right,  under  certain  limited  circumstances,  to  require  us  to  grant
exclusive, partially exclusive, or non-exclusive licenses to any of these inventions to a third party if it determines that: (i) adequate steps have not been taken
to  commercialize  the  invention;  (ii)  government  action  is  necessary  to  meet  public  health  or  safety  needs;  or  (iii)  government  action  is  necessary  to  meet
requirements  for  public  use  under  federal  regulations  (also  referred  to  as  “march-in  rights”).  The  U.S.  government  also  has  the  right  to  take  title  to  these
inventions if we fail to disclose the invention to the government or fail to file an application to register the intellectual property within specified time limits.
Intellectual property generated under a government funded program is also subject to certain reporting requirements, compliance with which may require us
to expend substantial resources. In addition, the U.S. government requires that any products embodying the subject invention or produced through the use of
the  subject  invention  be  manufactured  substantially  in  the  United  States.  The  manufacturing  preference  requirement  can  be  waived  if  the  owner  of  the
intellectual property can show that reasonable but unsuccessful efforts have been made to grant licenses on similar terms to potential licensees that would be
likely to manufacture substantially in the United States or that under the circumstances domestic manufacture is not commercially feasible. This preference
for U.S. manufacturers may limit our ability to contract with non-U.S. product manufacturers for products covered by such intellectual property. To the extent
any of our current or future intellectual property is generated through the use of U.S. government funding, the provisions of the Bayh-Dole Act may similarly
apply.

We may become involved in administrative adversarial proceedings in the U.S. PTO or in the patent offices of foreign countries brought by a third party
to attempt to cancel or invalidate our patent rights, which could be expensive, time consuming and cause a loss of patent rights.

The  Leahy-Smith  Act  created  for  the  first  time  new  procedures  to  challenge  issued  patents  in  the  United  States,  including  post-grant  review  and  inter
partes review proceedings, which some third parties have been using to cause the cancellation of selected or all claims of issued patents of competitors. For a
patent with a priority date of March 16, 2013 or later, a petition for post-grant review can be filed by a third party in a nine-month window from issuance of
the patent. A petition for inter partes review can be filed immediately following the issuance of a patent if the patent was filed prior to March 16, 2013. A
petition for inter partes review can be filed after the nine-month period for filing a post-grant review petition has expired for a patent with a priority date of
March  16,  2013  or  later.  Post-grant  review  proceedings  can  be  brought  on  any  ground  of  challenge,  whereas  inter partes  review  proceedings  can  only  be
brought  to  raise  a  challenge  based  on  published  prior  art.  These  administrative  adversarial  actions  at  the  U.S.  PTO  review  patent  claims  without  the
presumption of validity afforded to U.S. patents in lawsuits in U.S. federal courts, use a lower burden of proof than used by U.S. federal courts, and interpret
patent  claims  using  a  “broadest  reasonable  construction”  instead  of  “plain  and  ordinary  meaning,”  which  is  used  in  court  litigation.  Because  of  these
differences between U.S. administrative and judicial adversarial patent proceedings, it is generally considered easier for a competitor or third party to have a
U.S. patent cancelled in a patent office post-grant review or inter partes review proceeding than invalidated in a litigation in a U.S. federal court. If any of our
patents are challenged by a third party in such a U.S. patent office proceeding, there is no guarantee that we will be successful in defending the patent, which
would result in a loss of the challenged patent right to us.

Opposition or invalidation procedures are also available in most foreign countries. Many foreign authorities, such as the authorities at the European Patent
Office, have only post-grant opposition proceedings, however, certain countries, such as India, have both pre-grant and post-grant opposition proceedings.
These procedures have been used frequently against pharmaceutical patents in foreign countries. For example, in some foreign countries, these procedures are
used by generic companies to hold up an innovator’s patent rights as a means to allow the generic company to enter the market. This activity is particularly
prevalent in India, China and South America and may become more prevalent in Africa and other parts of Asia as certain countries reach more established
economies. If any of our patents are challenged in a foreign opposition or invalidation proceeding, we could face significant costs to defend our patents, and
we may not be successful. Uncertainties resulting from the initiation, continuation or loss of such proceedings could have a material adverse effect on our
ability to compete in the market place. Further, in many foreign jurisdictions, the losing party must pay the attorneys’ fees of the winning party, which can be
substantial.

We may have to file one or more lawsuits in court to prevent a third party from selling a product or using a product in a manner that infringes our patent,
which could be expensive, time consuming and unsuccessful, and ultimately result in the loss of our proprietary market.

Because competition in our industry is intense, competitors may infringe or otherwise violate our issued patents, patents of our licensors or other intellectual
property. To counter infringement or unauthorized use, we may be required to file infringement lawsuits, which can be expensive and time consuming. Any
claims we assert against perceived infringers could provoke these parties to assert counterclaims against us alleging that we infringe their patents. In addition,
in a patent infringement proceeding, a court may decide that a patent of ours is invalid or unenforceable, in whole or in part, construe the patent’s claims
narrowly or refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An
adverse result in any litigation proceeding could put one or more of our patents at risk of being invalidated or interpreted narrowly. We may also elect to enter
into license agreements in order to settle patent infringement claims or to resolve disputes prior to litigation, and any such license agreements may require us
to pay royalties and other fees that could be significant. Furthermore, because of the substantial

39

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.

Because  our  CDK  4/6  inhibitor  candidates  are  small  molecules,  after  commercialization  they  will  be  subject  to  the  patent  litigation  process  of  the  Hatch
Waxman Act, which allows a generic company to submit an Abbreviated New Drug Application, or ANDA, to the FDA to obtain approval to sell our drug
using bioequivalence data only. Under the Hatch Waxman Act, since our candidates will be considered new chemical entities, we will have the opportunity to
list all of our patents that cover our drug product or its method of use in the FDA’s compendium of “Approved Drug Products with Therapeutic Equivalence
Evaluation,” sometimes referred to as the FDA’s Orange Book. A generic company can submit an ANDA to the FDA four years after our drug approval. The
submission of the ANDA by a generic company is considered a technical act of patent infringement. The generic company can certify that it will wait until
the  natural  expiration  date  of  our  listed  patents  to  sell  a  generic  version  of  our  product  or  can  certify  that  one  or  more  of  our  listed  patents  are  invalid,
unenforceable, or not infringed. If the latter, we will have 45 days to bring a patent infringement lawsuit against the generic company. This will initiate a
challenge to one or more of our Orange Book listed patents based on arguments from the generic company that either our patent is invalid, unenforceable or
not infringed. Under the Hatch Waxman Act, if a lawsuit is brought, the FDA is prevented from issuing a final approval on the generic drug until the earlier of
seven-and-a-half years from our drug approval or a final decision of a court holding that our asserted patent claims are invalid, unenforceable or not infringed.
If we do not properly list our relevant patents in the Orange Book, or timely file a lawsuit in response to a certification from a generic company under an
ANDA, or if we do not prevail in the resulting patent litigation, we can lose our proprietary market, which can rapidly become generic. Further, even if we do
correctly list our relevant patents in the Orange Book, bring a lawsuit in a timely manner and prevail in that lawsuit, it may be at a very significant cost to us
of attorneys’ fees and employee time and distraction over a long period. Further, it is common for more than one generic company to try to sell an innovator
drug at the same time, and so we may be faced with the cost and distraction of multiple lawsuits. We may also determine it is necessary to settle the lawsuit in
a manner that allows the generic company to enter our market prior to the expiration of our patent or otherwise in a manner that adversely affects the strength,
validity or enforceability of our patent.

A number of pharmaceutical companies have been the subject of intense review by the U.S. Federal Trade Commission or a corresponding agency in
another  country  based  on  how  they  have  conducted  or  settled  drug  patent  litigation,  and  certain  reviews  have  led  to  an  allegation  of  an  anti-trust
violation, sometimes resulting in a fine or loss of rights. We cannot be sure that we would not also be subject to such a review or that the result of the
review would be favorable to us, which could result in a fine or penalty.

The U.S. Federal Trade Commission, or FTC, has brought a number of lawsuits in federal court in the past few years to challenge Hatch Waxman ANDA
litigation settlements between innovator companies and generic companies as anti-competitive. The FTC has taken an aggressive position that anything of
value is a payment, whether money is paid or not. Under their approach, if an innovator as part of a patent settlement agrees not to launch or delay launch of
an authorized generic during the 180-day period granted to the first generic company to challenge an Orange Book listed patent covering an innovator drug,
or negotiates a delay in entry without payment, the FTC may consider it an unacceptable reverse payment. The biopharmaceutical industry argues that such
agreements  are  rational  business  decisions  to  dismiss  risk  and  are  immune  from  antitrust  attack  if  the  terms  of  the  settlement  are  within  the  scope  of  the
exclusionary potential of the patent. In 2013, the U.S. Supreme Court, in a five-to-three decision in FTC v. Actavis, Inc. rejected both the biopharmaceutical
industry’s and FTC’s arguments with regard to so-called reverse payments, and held that whether a “reverse payment” settlement involving the exchange of
consideration for a delay in entry is subject to an anticompetitive analysis depends on five considerations: (a) the potential for genuine adverse effects on
competition; (b) the justification of payment; (c) the patentee’s ability to bring about anticompetitive harm; (d) whether the size of the payment is a workable
surrogate for the patent’s weakness; and (e) that antitrust liability for large unjustified payments does not prevent litigating parties from settling their lawsuits,
for example, by allowing the generic to enter the market before the patent expires without the patentee’s paying the generic. Furthermore, whether a reverse
payment is justified depends upon its size, its scale in relation to the patentee’s anticipated future litigation costs, its independence from other services for
which  it  might  represent  payment,  as  was  the  case  in  Actavis,  and  the  lack  of  any  other  convincing  justification.  The  Court  held  that  reverse  payment
settlements can potentially violate antitrust laws and are subject to the standard antitrust rule-of-reason analysis, with the burden of proving that an agreement
is unlawful on the FTC and leaving to lower courts the structuring of such rule of reason analysis. If we are faced with drug patent litigation, including Hatch
Waxman litigation with a generic company, we could be faced with such an FTC challenge based on that activity, including how or whether we settle the case,
and even if we strongly disagree with the FTC’s position, we could face a significant expense or penalty.

Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain
and could have a material adverse effect on the success of our business.

We  may  become  party  to,  or  threatened  with,  future  adversarial  proceedings  or  litigation  regarding  intellectual  property  rights  covering  our  products  and
technology, including interference or derivation proceedings before the U.S. PTO. Third parties may assert infringement claims against us based on existing
patents or patents that may be granted in the future. If we are found to infringe a third party’s intellectual property rights, we could be required to obtain a
license from such third party to continue developing and marketing our products and technology. However, we may not be able to obtain any required license
on commercially reasonable

40

terms or at all. Even if we were able to obtain a license, it could be non-exclusive, thereby giving our competitors access to the same technologies licensed to
us. We could be forced, including by court order, to cease commercializing the infringing technology or product. In addition, we could be found liable for
monetary damages, including treble damages and attorneys’ fees if we are found to have willfully infringed a patent. A finding of infringement could prevent
us from commercializing our product candidates or force us to cease some of our business operations, which could materially harm our business. Claims that
we have misappropriated the confidential information or trade secrets of third parties could have a similar negative impact on our business.

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

Filing, prosecuting and defending patents on our product candidates in all countries throughout the world would be prohibitively expensive, and therefore we
only file for patent protection in selected countries. The requirements for patentability may differ in certain countries, particularly in developing countries.
Moreover, our ability to protect and enforce our intellectual property rights may be adversely affected by unforeseen changes in foreign intellectual property
laws.

The laws of foreign countries may not protect our rights to the same extent as the laws of the United States. For example, Europe, India, China and certain
other  countries  do  not  allow  patents  for  methods  of  treating  the  human  body.  Many  companies  have  encountered  significant  problems  in  protecting  and
defending intellectual property rights in certain foreign jurisdictions that do not favor patent protection on drugs. This could make it difficult for us to stop the
infringement of our patents or the misappropriation of our other intellectual property rights. Competitors may use our technologies in jurisdictions where we
have  not  obtained  patent  protection  to  develop  their  own  drugs  and,  further,  may  export  otherwise  infringing  drugs  to  territories  where  we  have  patent
protection,  if  our  ability  to  enforce  our  patents  to  stop  infringing  activities  is  inadequate.  These  drugs  may  compete  with  our  product  candidates,  and  our
patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

Proceedings  to  enforce  our  patent  rights  in  foreign  jurisdictions,  whether  or  not  successful,  could  result  in  substantial  costs  and  divert  our  efforts  and
resources from other aspects of our business. Furthermore, while we intend to protect our intellectual property rights in the major markets for our product
candidates,  we  cannot  ensure  that  we  will  be  able  to  initiate  or  maintain  similar  efforts  in  all  jurisdictions  in  which  we  may  wish  to  market  our  product
candidates. Accordingly, our efforts to protect our intellectual property rights in such countries may be inadequate.

A number of foreign countries have stated that they are willing to issue compulsory licenses to patents held by innovator companies on approved drugs to
allow the government or one or more third party companies to sell the approved drug without the permission of the innovator patentee where the foreign
government concludes it is in the public interest. India, for example, has used such a procedure to allow domestic companies to make and sell patented drugs
without innovator approval. There is no guarantee that patents covering any of our drugs will not be subject to a compulsory license in a foreign country, or
that we will have any influence over if or how such a compulsory license is granted. Further, Brazil allows its regulatory agency ANVISA to participate in
deciding  whether  to  grant  a  drug  patent  in  Brazil,  and  patent  grant  decisions  are  made  based  on  several  factors,  including  whether  the  patent  meets  the
requirements for a patent and whether such a patent is deemed in the country’s interest. In addition, several other countries have created laws that make it
more  difficult  to  enforce  drug  patents  than  patents  on  other  kinds  of  technologies.  Further,  under  the  treaty  on  the  Trade-Related  Aspects  of  Intellectual
Property, or TRIPS, as interpreted by the Doha Declaration, countries in which drugs are manufactured are required to allow exportation of the drug to a
developing country that lacks adequate manufacturing capability. Therefore, our drug markets in the United States or foreign countries may be affected by the
influence of current public policy on patent issuance, enforcement or involuntary licensing in the healthcare area.

In addition, in November 2015, members of the World Trade Organization, or the WTO, which administers TRIPS, voted to extend the exemption against
enforcing pharmaceutical drug patents in least developed countries until 2033. We currently have no patent applications filed in least developed countries, and
our current intent is not to file in these countries in the future, at least in part due to this WTO pharmaceutical patent exemption.

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

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 U.S.
PTO and various governmental patent agencies outside of the United States in 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 employ an outside firm and rely on our outside counsel to pay these fees due to non-U.S. patent
agencies. 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 lapse of
the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. In such an event, our competitors might be
able to enter the market and this circumstance would have a material adverse effect on our business.

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Intellectual property litigation could cause us to spend substantial resources and distract our personnel from their normal responsibilities.

Litigation  or  other  legal  proceedings  relating  to  intellectual  property  claims,  with  or  without  merit,  is  unpredictable  and  generally  expensive  and  time
consuming  and  is  likely  to  divert  significant  resources  from  our  core  business,  including  distracting  our  technical  and  management  personnel  from  their
normal responsibilities. 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, there could be public announcements
of the results of hearings, motions or other interim proceedings or developments and 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. Such litigation or proceedings could substantially increase our operating losses and
reduce the resources available for development activities or any future sales, marketing or distribution activities.

We may not have sufficient financial or other resources to adequately conduct such litigation or proceedings. Some of our competitors may be able to sustain
the  costs  of  such  litigation  or  proceedings  more  effectively  than  we  can  because  of  their  greater  financial  resources  and  more  mature  and  developed
intellectual property portfolios. Accordingly, despite our efforts, we may not be able to prevent third parties from infringing upon or misappropriating or from
successfully challenging our intellectual property rights. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings
could have a material adverse effect on our ability to compete in the marketplace.

If we fail to comply with our obligations under the license agreement with the University of Illinois, we could lose license rights that are necessary for
developing and commercializing G1T48.

Our  exclusive  license  with  the  University  of  Illinois,  or  UIC,  for  technology  relating  to  G1T48  imposes  various  development,  commercialization,  royalty
payment, diligence and other obligations on us. Specifically, we are required to:

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pay UIC a minimum annual fee and potential milestone payments;
pay UIC low single-digit royalties on all net sales of products and a share of any sublicensing revenues;
use commercially reasonable efforts to bring products to market;
provide financial reports to UIC;
file, prosecute, defend and maintain patent rights; and
indemnify UIC against certain claims and maintain insurance coverage.

If we breach any of these obligations, UIC may have the right to terminate the license, which would result in our being unable to develop, manufacture and
sell products that are covered by the licensed technology, including G1T48, or in a competitor’s gaining access to the licensed technology.

We may be subject to claims by third parties asserting that our employees or we have misappropriated their intellectual property, or claiming ownership of
what we regard as our own intellectual property.

Many of our employees were previously employed at universities or other biotechnology or pharmaceutical companies, including our competitors or potential
competitors. Although we try to ensure that our employees do not use the proprietary information or know-how of others in their work for us, we may be
subject to claims that these employees or we have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such
employee’s former employer. Litigation may be necessary to defend against these claims.

In  addition,  while  it  is  our  policy  to  require  our  employees  and  contractors  who  may  be  involved  in  the  development  of  intellectual  property  to  execute
agreements  assigning  such  intellectual  property  to  us,  we  may  be  unsuccessful  in  executing  such  an  agreement  with  each  party  who  in  fact  develops
intellectual property that we regard as our own. Our and their assignment agreements may not be self-executing or may be breached, and we may be forced to
bring claims against third parties, or defend claims they may bring against us, to determine the ownership of what we regard as our intellectual property.

If  we  fail  in  prosecuting  or  defending  any  such  claims,  in  addition  to  paying  monetary  damages,  we  may  lose  valuable  intellectual  property  rights  or
personnel.  Even  if  we  are  successful  in  prosecuting  or  defending  against  such  claims,  litigation  could  result  in  substantial  costs  and  be  a  distraction  to
management.

If we are unable to protect the confidentiality of our trade secrets, our business and competitive position would be harmed.

In addition to seeking patents for some of our technology and product candidates, we also rely on trade secrets, including unpatented know-how, technology
and other proprietary information, to maintain our competitive position. We seek to protect these trade secrets, in part, by entering into non-disclosure and
confidentiality agreements with parties who have access to them, such as our employees, corporate collaborators, outside scientific collaborators, contract
manufacturers, consultants, advisors and other third parties. We seek

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to protect our confidential proprietary information, in part, by entering into confidentiality and invention or patent assignment agreements with our employees
and consultants, however, we cannot be certain that such agreements have been entered into with all relevant parties. Moreover, to the extent we enter into
such agreements, 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. Enforcing a claim that a party illegally disclosed or misappropriated a trade secret is difficult, expensive
and time-consuming, and the outcome is unpredictable. In addition, some courts inside and outside the United States are less willing or unwilling to protect
trade secrets. If any of our trade secrets were to be lawfully obtained or independently developed by a competitor, we would have no right to prevent them, or
those to whom they communicate it, from using that technology or information to compete with us. If any of our trade secrets were to be disclosed to or
independently developed by a competitor, our competitive position would be harmed.

Risks related to employee matters, managing growth and other risks related to our business

We  currently  have  a  limited  number  of  employees,  and  our  future  success  depends  on  our  ability  to  retain  key  executives  and  to  attract,  retain  and
motivate qualified personnel.

We are an early-stage clinical development company, and, as of December 31, 2017, had only 44 employees, which includes five executive officers. We are
highly dependent on the research and development, clinical and business development expertise of Mark A. Velleca, M.D., Ph.D., our President and Chief
Executive  Officer,  Rajesh  Malik,  M.D.,  our  Chief  Medical  Officer,  Barclay  Phillips,  our  Chief  Financial  Officer,  Jay  Strum,  Ph.D.,  our  Chief  Scientific
Officer, and Terry Murdock, our Senior Vice President of Development Operations, as well as the other principal members of our management, scientific and
clinical team. Although we have entered into employment agreements with our executive officers, each of them may terminate their employment with us at
any time. Other than for Dr. Velleca and Dr. Malik, we do not maintain “key person” insurance for any of our executives or other employees. In addition, we
rely on consultants and advisors, including scientific and clinical advisors, to assist us in formulating our research and development and commercialization
strategy. Our consultants and advisors may be employed by employers other than us and may have commitments under consulting or advisory contracts with
other entities that may limit their availability to us. If we are unable to continue to attract and retain high quality personnel, our ability to pursue our growth
strategy will be limited.

Recruiting  and  retaining  qualified  scientific,  clinical,  manufacturing,  sales  and  marketing  personnel  will  also  be  critical  to  our  success.  The  loss  of  the
services of our executive officers or other key employees could impede the achievement of our research, development and commercialization objectives and
seriously harm our ability to successfully implement our business strategy. Furthermore, replacing executive officers and key employees may be difficult and
may  take  an  extended  period  of  time  because  of  the  limited  number  of  individuals  in  our  industry  with  the  breadth  of  skills  and  experience  required  to
successfully develop, obtain marketing approval of and commercialize products. Competition to hire from this limited pool is intense, and we may be unable
to  hire,  train,  retain  or  motivate  these  key  personnel  on  acceptable  terms  given  the  competition  among  numerous  pharmaceutical  and  biotechnology
companies for similar personnel. We also experience competition for the hiring of scientific and clinical personnel from universities and research institutions.
Failure to succeed in clinical trials may make it more challenging to recruit and retain qualified scientific personnel. If we are unable to continue to attract and
retain high quality personnel, our ability to pursue our growth strategy will be limited.

We expect to expand our development and regulatory capabilities and potentially implement sales, marketing and distribution capabilities, and as a result,
we may encounter difficulties in managing our growth, which could disrupt our operations.

To  manage  our  anticipated  development  and  expansion,  we  must  continue  to  implement  and  improve  our  managerial,  operational  and  financial  systems,
expand our facilities and continue to recruit and train additional qualified personnel. Also, our management may need to divert a disproportionate amount of
its  attention  away  from  its  day-to-day  activities  and  devote  a  substantial  amount  of  time  to  managing  these  development  activities.  Due  to  our  limited
resources, we may not be able to effectively manage the expansion of our operations or recruit and train additional qualified personnel. This may result in
weaknesses  in  our  infrastructure,  give  rise  to  operational  mistakes,  loss  of  business  opportunities,  loss  of  employees  and  reduced  productivity  among
remaining employees. The physical expansion of our operations may lead to significant costs and may divert financial resources from other projects, such as
the development of our product candidates. If our management is unable to effectively manage our expected development and expansion, our expenses may
increase more than expected, our ability to generate or increase our revenue could be reduced and we may not be able to implement our business strategy. Our
future financial performance and our ability to commercialize our product candidates, if approved, and compete effectively will depend, in part, on our ability
to effectively manage the future development and expansion of our company.

Unfavorable global economic conditions could adversely affect our business, financial condition or results of operations.

Our  results  of  operations  could  be  adversely  affected  by  general  conditions  in  the  global  economy  and  in  the  global  financial  markets.  The  recent  global
financial  crisis  caused  extreme  volatility  and  disruptions  in  the  capital  and  credit  markets.  A  severe  or  prolonged  economic  downturn,  such  as  the  recent
global financial crisis, could result in a variety of risks to our business, including our ability to

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raise additional capital when needed on acceptable terms, if at all. A weak or declining economy could also strain our suppliers, possibly resulting in supply
disruption.  Any  of  the  foregoing  could  harm  our  business,  and  we  cannot  anticipate  all  of  the  ways  in  which  the  current  economic  climate  and  financial
market conditions could adversely impact our business.

Our business and operations could suffer in the event of system failures.

We utilize information technology systems and networks to process, transmit and store electronic information in connection with our business activities. As
use  of  digital  technologies  has  increased,  cyber  incidents,  including  deliberate  attacks  and  attempts  to  gain  unauthorized  access  to  computer  systems  and
networks,  have  increased  in  frequency  and  sophistication.  These  threats  pose  a  risk  to  the  security  of  our  systems  and  networks  and  the  confidentiality,
availability and integrity of our data. There can be no assurance that we will be successful in preventing cyber-attacks or successfully mitigating their effects.

Despite the implementation of security measures, our internal computer systems and those of our third-party CROs and other contractors and consultants are
vulnerable  to  damage  from  cyber-attack,  computer  viruses,  unauthorized  access,  natural  disasters,  terrorism,  war  and  telecommunication  and  electrical
failures.  Furthermore,  we  have  little  or  no  control  over  the  security  measures  and  computer  systems  of  our  third-party  CROs  and  other  contractors  and
consultants.  While  we  have  not  experienced  any  such  system  failure,  accident,  or  security  breach  to  date,  if  such  an  event  were  to  occur  and  cause
interruptions in our operations, it could result in a material disruption of our programs. For example, the loss of clinical trial data for our product candidates
could result in delays in our marketing approval efforts and significantly increase our costs to recover or reproduce the data. To the extent that any disruption
or security breach results in a loss of or damage to our data or applications or other data or applications relating to our technology or product candidates, or
inappropriate disclosure of confidential or proprietary information, we could incur liabilities and the further development of our product candidates could be
delayed.

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

We  are  exposed  to  the  risk  that  our  employees,  principal  investigators,  CROs  and  consultants  may  engage  in  fraudulent  conduct  or  other  illegal  activity.
Misconduct  by  these  parties  could  include  intentional,  reckless  and/or  negligent  conduct  or  disclosure  of  unauthorized  activities  to  us  that  violate  the
regulations  of  the  FDA  and  other  regulatory  authorities,  including  those  laws  requiring  the  reporting  of  true,  complete  and  accurate  information  to  such
authorities; healthcare fraud and abuse laws and regulations in the United States and abroad; or laws that require the reporting of financial information or data
accurately.  In  particular,  sales,  marketing  and  business  arrangements  in  the  healthcare  industry  are  subject  to  extensive  laws  and  regulations  intended  to
prevent fraud, misconduct, kickbacks, self-dealing and other abusive practices. 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. Activities subject to these laws also
involve the improper use of information obtained in the course of clinical trials or creating fraudulent data in our preclinical studies or clinical trials, which
could result in regulatory sanctions and cause serious harm to our reputation. We have adopted a code of conduct applicable to all of our employees, but it is
not always possible to identify and deter misconduct by employees and other third parties, and the precautions we take to detect and prevent this activity may
not  be  effective  in  controlling  unknown  or  unmanaged  risks  or  losses  or  in  protecting  us  from  governmental  investigations  or  other  actions  or  lawsuits
stemming  from  a  failure  to  comply  with  these  laws  or  regulations.  Additionally,  we  are  subject  to  the  risk  that  a  person  could  allege  such  fraud  or  other
misconduct, even if none occurred. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those
actions could have a significant impact on our business, including the imposition of civil, criminal and administrative penalties, damages, monetary fines,
possible  exclusion  from  participation  in  Medicare,  Medicaid  and  other  federal  healthcare  programs,  contractual  damages,  reputational  harm,  diminished
profits  and  future  earnings,  and  curtailment  of  our  operations,  any  of  which  could  adversely  affect  our  ability  to  operate  our  business  and  our  results  of
operations.

We may expend our limited resources to pursue a particular product candidate and fail to capitalize on product candidates that may be more profitable or
for which there is a greater likelihood of success.

Because  we  have  limited  financial  and  managerial  resources,  we  focus  on  specific  product  candidates.  As  a  result,  we  may  forgo  or  delay  pursuit  of
opportunities with other product candidates that later prove to have greater commercial potential. Our resource allocation decisions may cause us to fail to
capitalize  on  viable  commercial  products  or  profitable  market  opportunities.  Our  spending  on  current  and  future  research  and  development  programs  and
product  candidates  for  specific  indications  may  not  yield  any  commercially  viable  product  candidates.  If  we  do  not  accurately  evaluate  the  commercial
potential or target market for a particular product candidate, we may relinquish valuable rights to that product candidate through collaboration, licensing or
other royalty arrangements in cases in which it would have been more advantageous for us to retain sole development and commercialization rights to such
product candidate.

We may acquire businesses or drugs, or form strategic alliances, in the future, and we may not realize the benefits of such acquisitions.

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We may acquire additional businesses or drugs, form strategic alliances or create joint ventures with third parties that we believe will complement or augment
our existing business. If we acquire businesses with promising markets or technologies, we may not be able to realize the benefit of acquiring such businesses
if we are unable to successfully integrate them with our existing operations and company culture. We may encounter numerous difficulties in developing,
manufacturing and marketing any new drugs resulting from a strategic alliance or acquisition that delay or prevent us from realizing their expected benefits or
enhancing our business. We cannot assure you that, following any such acquisition, we will achieve the expected synergies to justify the transaction.

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

Earthquakes or other natural disasters could severely disrupt our operations and have a material adverse effect on our business, results of operations, financial
condition  and  prospects.  If  a  natural  disaster,  power  outage  or  other  event  occurred  that  prevented  us  from  using  all  or  a  significant  portion  of  our
headquarters, that damaged critical infrastructure, such as the manufacturing facilities of our third-party contract manufacturers, or that otherwise disrupted
operations,  it  may  be  difficult  or,  in  certain  cases,  impossible  for  us  to  continue  our  business  for  a  substantial  period  of  time.  The  disaster  recovery  and
business continuity plans we have in place may prove inadequate in the event of a serious disaster or similar event. We may incur substantial expenses as a
result of the limited nature of our disaster recovery and business continuity plans, which could have a material adverse effect on our business.

The recently passed comprehensive tax reform bill could adversely affect our business and financial condition.

On December 22, 2017, President Trump signed into law the “Tax Cuts and Jobs Act,” or Tax Act, that significantly reforms the Internal Revenue Code of
1986, as amended, or the Code. The Tax Act, among other things, includes changes to U.S. federal tax rates, imposes significant additional limitations on the
deductibility  of  interest  and  net  operating  loss  carryforwards,  allows  for  the  expensing  of  capital  expenditures,  and  puts  into  effect  the  migration  from  a
“worldwide” system of taxation to a territorial system. We continue to examine the impact this tax reform legislation may have on our business. The impact of
this tax reform is uncertain and could be adverse. We urge our stockholders to consult with their legal and tax advisors with respect to such legislation and the
potential tax consequences of investing in our common stock.

Risks related to our common stock

The price of our common stock may be volatile and fluctuate substantially.

The  market  price  of  shares  of  our  common  stock  could  be  subject  to  wide  fluctuations  in  response  to  many  risk  factors  listed  in  this  section,  and  others
beyond our control, including:

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results of preclinical and clinical trials of our product candidates, including trilaciclib, G1T38 and G1T48;
results of clinical trials of our competitors’ products;
regulatory actions with respect to our products or our competitors’ products;
actual or anticipated fluctuations in our financial condition and operating results;
publication of research reports by securities analysts about us or our competitors or our industry;
our failure or the failure of our competitors to meet analysts’ projections or guidance that we or our competitors may give to the market;
developments or disputes concerning patent applications, issued patents or other proprietary rights;
additions and departures of key personnel;
strategic decisions by us or our competitors, such as acquisitions, collaborations, divestitures, spin-offs, joint ventures, strategic investments or
changes in business strategy;
the passage of legislation or other regulatory developments in the United States and other countries affecting us or our industry;
fluctuations in the valuation of companies perceived by investors to be comparable to us;
sales of our common stock by us, our insiders or our other stockholders;
speculation in the press or investment community;
announcement or expectation of additional financing efforts;
changes in accounting principles;
changes in the structure of healthcare payment systems;
terrorist acts, acts of war or periods of widespread civil unrest;
natural disasters and other calamities;
changes in market conditions for pharmaceutical and biopharmaceutical stocks;
changes in general market, industry and economic conditions; and
the other factors described in this “Risk Factors” section.

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In addition, the stock market has experienced significant volatility, particularly with respect to pharmaceutical, biotechnology and other life sciences company
stocks.  The  volatility  of  pharmaceutical,  biotechnology  and  other  life  sciences  company  stocks  often  does  not  relate  to  the  operating  performance  of  the
companies represented by the stock. In the past, securities class action litigation has often been initiated against companies following periods of volatility in
their stock price. This type of litigation could result in substantial costs and divert our management’s attention and resources, and could also require us to
make substantial payments to satisfy judgments or to settle litigation.

Our executive officers, directors and principal stockholders and their affiliates, if they choose to act together, will continue to have the ability to exercise
significant influence over all matters submitted to stockholders for approval.

Our  executive  officers  and  directors,  combined  with  our  stockholders  who  owned  more  than  5%  of  our  outstanding  common  stock,  in  the  aggregate,
beneficially own shares representing a majority of our outstanding capital stock. As a result, if these stockholders were to choose to act together, they would
be able to influence our management and affairs and the outcome of matters submitted to our stockholders for approval, including the election of directors and
any sale, merger, consolidation, or sale of all or substantially all of our assets. This concentration of ownership control may adversely affect the market price
of our common stock by:

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delaying, deferring or preventing a change in control;
entrenching our management and the board of directors;
impeding a merger, consolidation, takeover or other business combination involving us that other stockholders may desire; and/or
discouraging a potential acquirer from making a tender offer or otherwise attempting to obtain control of us.

Provisions  in  our  corporate  charter  documents  and  under  Delaware  law  could  make  an  acquisition  of  our  company,  which  may  be  beneficial  to  our
stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management.

Provisions  in  our  certificate  of  incorporation  and  our  by-laws  may  discourage,  delay  or  prevent  a  merger,  acquisition  or  other  change  in  control  of  our
company that stockholders may consider favorable, including transactions in which you might otherwise receive a premium for your shares. These provisions
could also limit the price that investors might be willing to pay in the future for shares of our common stock, thereby depressing the market price of our
common stock. In addition, because our board of directors is responsible for appointing the members of our management team, these provisions may frustrate
or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for stockholders to replace members of
our  board  of  directors.  Although  we  believe  these  provisions  collectively  provide  for  an  opportunity  to  obtain  greater  value  for  stockholders  by  requiring
potential acquirers to negotiate with our board of directors, they would apply even if an offer rejected by our board of directors were considered beneficial by
some stockholders. Among other things, these provisions:

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establish a classified board of directors such that only one of three classes of directors is elected each year;
allow the authorized number of our directors to be changed only by resolution of our board of directors;
limit the manner in which stockholders can remove directors from our board of directors;
establish advance notice requirements for stockholder proposals that can be acted on at stockholder meetings and nominations to our board of
directors;
require  that  stockholder  actions  must  be  effected  at  a  duly  called  stockholder  meeting  and  prohibit  actions  by  our  stockholders  by  written
consent;
limit who may call stockholder meetings;
authorize  our  board  of  directors  to  issue  preferred  stock  without  stockholder  approval,  which  could  be  used  to  institute  a  “poison  pill”  that
would work to dilute the stock ownership of a potential hostile acquirer, effectively preventing acquisitions that have not been approved by our
board of directors; and
require the approval of the holders of at least two-thirds of the voting power of all of the then-outstanding shares of capital stock that would be
entitled to vote generally in the election of directors to amend or repeal specified provisions of our certificate of incorporation or by-laws.

Moreover, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which
prohibits a person who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of three years after the date of
the transaction in which the person acquired in excess of 15% of our outstanding voting stock, unless the merger or combination is approved in a prescribed
manner.

Our certificate of incorporation includes a forum selection clause, which could limit our stockholders’ ability to obtain a favorable judicial forum for
disputes with us.

Our certificate of incorporation provides that, unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of
Delaware will be the sole and exclusive forum for any stockholder to bring (i) any derivative action or

46

 
 
 
 
 
 
 
 
 
 
 
 
proceeding brought on our behalf, (ii) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers, or employees to us or
to  our  stockholders,  (iii)  any  action  asserting  a  claim  arising  pursuant  to  any  provision  of  the  Delaware  General  Corporation  Law  or  our  certificate  of
incorporation  or  by-laws,  or  (iv)  any  action  asserting  a  claim  governed  by  the  internal  affairs  doctrine;  in  all  cases  subject  to  the  court’s  having  personal
jurisdiction over the indispensable parties named as defendants. Any person or entity purchasing or otherwise acquiring any interest in shares of our capital
stock is deemed to have notice of and consented to the foregoing provisions. This forum selection provision in our certificate of incorporation may limit our
stockholders’ ability to obtain a favorable judicial forum for disputes with us. It is also possible that, notwithstanding the forum selection clause included in
our certificate of incorporation, a court could rule that such a provision is inapplicable or unenforceable.

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

The trading market for our common stock will depend in part on the research and reports that securities or industry analysts publish about us or our business.
We do not have any control over these analysts. We may never obtain research coverage by industry or financial analysts. If no or few analysts commence
coverage of us, the trading price of our stock would likely decrease. Even if we do obtain analyst coverage, there can be no assurance that analysts will cover
us or provide favorable coverage. If one or more of the analysts who covers us downgrades our stock or changes his or her opinion of our stock, our stock
price would likely decline. If one or more of these analysts cease coverage of our company or fail to regularly publish reports on us, we could lose visibility in
the financial markets, which could cause our stock price or trading volume to decline.

We are an “emerging growth company,” and the reduced disclosure requirements applicable to emerging growth companies may make our common stock
less attractive to investors.

We are an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act. We will remain an emerging growth
company until the earlier of (i) the last day of the fiscal year in which we have total annual gross revenues of $1.07 billion or more; (ii) the last day of the
fiscal year following the fifth anniversary of the date of the completion of our initial public offering, or IPO; (iii) the date on which we have issued more than
$1 billion in nonconvertible debt during the previous three years; or (iv) the date on which we are deemed to be a large accelerated filer under the rules of the
Securities and Exchange Commission, which means the market value of our common stock that is held by non-affiliates exceeds $700 million as of the prior
June 30th. For so long as we remain an emerging growth company, we are permitted and intend to rely on exemptions from certain disclosure requirements
that are applicable to other public companies that are not emerging growth companies. These exemptions include:

•
•

•

•
•

not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act of 2002;
not  being  required  to  comply  with  any  requirement  that  may  be  adopted  by  the  Public  Company  Accounting  Oversight  Board  regarding
mandatory  audit  firm  rotation  or  a  supplement  to  the  auditor’s  report  providing  additional  information  about  the  audit  and  the  financial
statements;
providing  only  two  years  of  audited  financial  statements  in  addition  to  any  required  unaudited  interim  financial  statements  and  a
correspondingly reduced “Management’s Discussion and Analysis of Financial Condition and Results of Operations” disclosure in our initial
registration statement;
reduced disclosure obligations regarding executive compensation; and
exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden
parachute payments not previously approved.

We  may  choose  to  take  advantage  of  some,  but  not  all,  of  the  available  exemptions.  We  will  continue  to  take  advantage  of  these  reduced  reporting
requirements for as long as we remain an emerging growth company. We cannot predict whether investors will find our common stock less attractive if we
rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock
and our stock price may be more volatile.

In addition, the JOBS Act provides that an emerging growth company can take advantage of an extended transition period for complying with new or revised
accounting standards. This allows an emerging growth company to delay the adoption of certain accounting standards until those standards would otherwise
apply to private companies. We have irrevocably elected not to avail ourselves of this exemption from new or revised accounting standards and, therefore, we
will be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies.

We have incurred and will continue to incur increased costs as a result of operating as a public company, and our management will be required to devote
substantial time to new compliance initiatives and corporate governance practices.

As a public company, and particularly after we are no longer an emerging growth company, we have incurred and will continue to incur significant legal,
accounting and other expenses that we did not incur as a private company. The Sarbanes-Oxley Act of 2002,

47

 
 
 
 
 
the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of The Nasdaq Stock Market and other applicable securities rules
and regulations impose various requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and
corporate  governance  practices.  Our  management  and  other  personnel  will  need  to  devote  a  substantial  amount  of  time  to  these  compliance  initiatives.
Moreover, these rules and regulations will increase our legal and financial compliance costs and will make some activities more time-consuming and costly.
For example, we expect that these rules and regulations may make it more difficult and more expensive for us to obtain director and officer liability insurance.

We are evaluating these rules and regulations, and cannot predict or estimate the amount of additional costs we may incur or the timing of such costs. These
rules and regulations are often subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice
may  evolve  over  time  as  new  guidance  is  provided  by  regulatory  and  governing  bodies.  This  could  result  in  continuing  uncertainty  regarding  compliance
matters and higher costs necessitated by ongoing revisions to disclosure and governance practices.

Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, or Section 404, we will first be required to furnish a report by our management on our internal
control over financial reporting for the year ending December 31, 2018. However, while we remain an emerging growth company, we will not be required to
include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm. To achieve compliance
with Section 404 within the prescribed period, we will be engaged in a process to document and evaluate our internal control over financial reporting, which
is  both  costly  and  challenging.  In  this  regard,  we  will  need  to  continue  to  dedicate  internal  resources,  potentially  engage  outside  consultants  and  adopt  a
detailed  work  plan  to  assess  and  document  the  adequacy  of  internal  control  over  financial  reporting,  continue  steps  to  improve  control  processes  as
appropriate, validate through testing that controls are functioning as documented and implement a continuous reporting and improvement process for internal
control over financial reporting. Despite our efforts, there is a risk that we will not be able to conclude, within the prescribed timeframe or at all, that our
internal control over financial reporting is effective as required by Section 404. If we identify one or more material weaknesses, it could result in an adverse
reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.

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

Under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, a corporation that undergoes an “ownership change,” is subject to limitations
on its ability to use its pre-change net operating loss carryforwards, or NOLs, and other pre-change tax attributes (such as research tax credits) to offset its
post-change income or taxes. For these purposes, an ownership change generally occurs where the equity ownership of one or more stockholders or groups of
stockholders who owns at least 5% of a corporation’s stock increases its ownership by more than 50 percentage points over its lowest ownership percentage
within a three-year period. We may have experienced such ownership changes in the past, and we may experience shifts in our stock ownership, some of
which are outside the Company’s control. These ownership changes may subject our existing NOLs or credits to substantial limitations under Sections 382
and  383.  Accordingly,  we  may  not  be  able  to  utilize  a  material  portion  of  our  NOLs  or  credits.  As  of  December  31,  2017,  we  had  federal  NOLs  of
approximately  $100.8  million.  Limitations  on  our  ability  to  utilize  those  NOLs  to  offset  U.S.  federal  taxable  income  could  potentially  result  in  increased
future tax liability to us. In addition, at the state level, there may be periods during which the use of NOLs is suspended or otherwise limited, which could
accelerate or permanently increase state taxes owed.

We do not anticipate paying any cash dividends on our capital stock in the foreseeable future.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all of our future earnings, if any, to finance the growth and
development of our business. In addition, the terms of any future debt agreements may preclude us from paying dividends. As a result, capital appreciation, if
any, of our common stock will be the sole source of gain for our stockholders for the foreseeable future.

Item 1B. Unresolved Staff Comments.

None.

48

 
Item 2. Properties.

Our corporate headquarters is located in Research Triangle Park, North Carolina, where we lease approximately 14,103 square feet of laboratory and office
space.  In January 2018, we signed an amendment to our current lease to secure an additional 6,395 square feet of office space in our existing building.  We
expect this space to be available in July 2018.  Our lease on our corporate headquarters expires on December 31, 2022.  We believe our facilities are adequate
for our current needs and that suitable additional substitute space would be available if needed.

Item 3. Legal Proceedings.

We are not currently subject to any material pending legal proceedings.

Item 4. Mine Safety Disclosures.

Not applicable.

49

PART II

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

Market Information

Our common stock has traded on the Nasdaq Global Select Market under the symbol “GTHX” since May 17, 2017. Prior to that time, there was no public
market for our common stock. As a result, we have only set forth quarterly information with respect to the high and low sales prices of our common stock for
the three most recent fiscal quarters. The following table states the high and low sales prices of our common stock for each of the last three calendar quarters
during the year ended December 31, 2017.

Second Quarter 2017 (beginning May 17, 2017)
Third Quarter 2017
Fourth Quarter 2017

Low

High

$
$
$

13.35  
12.04  
18.20  

  $
  $
  $

20.60 
28.67 
27.93

Holders

As of February 21, 2018, there were approximately 26 stockholders of record of our common stock.  Holders of record are defined as those stockholders
whose shares are registered in their names in our stock records and do not include beneficial owners of common stock whose shares are held in the names of
brokers, dealers or clearing agencies.  

Dividends

We have never paid cash dividends and do not anticipate paying cash dividends in the foreseeable future. We currently intend to retain earnings, if any, to
finance growth and development of our business.

Stock Performance Graph

This performance graph is not “soliciting material,” is not deemed filed with the SEC and is not to be incorporated by reference in any filing by us under the
Securities Act of 1933 or the Securities and Exchange Act of 1934, as amended, whether made before or after the date hereof and irrespective of any general
incorporation language in any such filing. The stock price performance shown on the graph is not necessarily indicative of future price performance.

50

 
 
 
 
 
 
 
 
 
Comparison of Cumulative Total Return
Among G1 Therapeutics, Inc., the Nasdaq Biotechnology Index and the Nasdaq Composite Index

The above graph measures the change in a $100 investment in our common stock from May 17, 2017 (the date our common stock commenced trading on the Nasdaq
Global Select Market) through December 31, 2017. Our relative performance is then compared with the Nasdaq Composite Index and the Nasdaq Biotechnology
Index.

Recent Sales of Unregistered Securities

None.  

Use of Proceeds from Registered Securities

On May 16, 2017, the SEC declared our Registration Statement on Form S-1 (File No. 333-217285) effective and our registration statement on Form S-1 filed
pursuant to Rule 462(b) of the Securities Act of 1933, as amended, (File no. 333-218045) also become effective. Our IPO closed on May 22, 2017. We sold
an aggregate of 7,781,564 shares of our common stock in the IPO, including 781,564 shares sold pursuant to the partial exercise of the underwriters’ over-
allotment  option,  at  a  price  to  the  public  of  $15.00  per  share  for  aggregate  gross  proceeds  of  $116.7  million.   As  a  result,  we  received  net  proceeds  of
$107.1  million  (after  underwriters’  discounts,  commissions,  and  other  offering  expenses).  The  managing  underwriter  of  the  offering  was  J.P.  Morgan
Securities LLC.

The net proceeds of the IPO have been invested in accordance with our investment policy. There has been no material change in the planned use of proceeds
from our IPO as described in our final prospectus dated May 16, 2017 and filed with the SEC on May 17, 2017.

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

We did not purchase any of our equity securities during the fourth quarter of 2017.

51

 
 
 
 
 
 
 
 
 
 
 
Item 6. Selected Financial Data.

You should read the following selected financial data together with the information under the caption “Management’s Discussion and Analysis of Financial
Condition  and  Results  of  Operations”  and  our  audited  financial  statements  and  accompanying  notes  included  in  this  Annual  Report.  We  have  derived  the
statement of operations data for the years ended December 31, 2017, 2016 and 2015 and the balance sheet data as of and December 31, 2017 and 2016 from
our audited financial statements included elsewhere in this Annual Report. The selected balance sheet data as of December 31, 2015 is derived from audited
financial statements that are not included in this Annual Report.  Our historical results are not necessarily indicative of results that should be expected in the
future.

Statements of Operations Data:
Grant revenue
Operating expenses:

Research and development
General and administrative
Total operating expenses
Operating loss

Other income (expenses):

Other income
Change in fair value of warrant liability
Change in fair value of Series B purchase option liability

Total other income (expense), net
Net loss and comprehensive loss

Accretion of redeemable convertible preferred stock(1)
Net loss attributable to common shareholders
Basic and diluted net loss per share(2)
Weighted average shares outstanding, basic and diluted(2)

Balance Sheet Data:
Cash, cash equivalents and short-term investments
Working capital(3)
Total assets
Redeemable convertible preferred stock
Total stockholders' equity/(deficit)

Year Ended December 31,
2017
2015
2016
(in thousands except share and per share amounts)

  $

—  

  $

—  

  $

522 

53,881  
7,087  
60,968  
(60,968 )

888  
(41 )
—  
847  
(60,121 )
(4,757 )
(64,878 )
(3.57 )
18,197,970  

  $

25,161  
5,230  
30,391  
(30,391 )

182  
(82 )
—  
100  
(30,291 )
(4,405 )
(34,696 )
(23.33 )
1,486,986  

Year Ended December 31,

2017

2016
(in thousands)

  $

103,812  
92,957  
105,171  
—  
93,388  

47,305  
42,276  
48,212  
107,580  
(64,993 )

  $

  $

12,730 
3,216 
15,946 
(15,424)

18 
(85)
(4,772)
(4,839)
(20,263)
(1,427)
(21,690)
(16.13)
1,344,584

2015

22,938  
21,582  
23,897  
53,424  
(31,695 )

  $

  $

(1)

(2)

Subsequent to our initial public offering in May 2017, our redeemable convertible preferred stock was converted to common stock and no further accretion has
been recorded.
See  Note  9  to  our  financial  statements  appearing  elsewhere  in  this  Annual  Report  for  further  details  on  the  calculation  of  basic  and  diluted  net  loss  per  share
applicable to common stockholders.

(3) We define working capital as current assets less current liabilities.

52

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

You should read the following discussion and analysis of our financial condition and results of operations together with our financial statements and related
notes included elsewhere in this Annual Report. This discussion contains forward-looking statements that involve risk and uncertainties, such as statements of
our plans, objectives, expectations and intentions. As a result of many factors, including those factors set forth in the “Risk Factors” section of this Annual
Report,  our  actual  results  could  differ  materially  from  the  results  described  in  or  implied  by  the  forward-looking  statements  contained  in  the  following
discussion and analysis.

Overview

We are a clinical-stage biopharmaceutical company focused on the discovery, development and commercialization of novel small molecule therapeutics for
the treatment of patients with cancer. Our product portfolio is built on a drug discovery platform that targets key cellular pathways with proprietary medicinal
chemistry. Our therapies are designed to enable more effective combination treatment strategies and improve outcomes for patients across multiple oncology
indications.

Product Pipeline

Our product pipeline includes several product candidates with the potential to significantly improve the treatment of patients with cancer.  Our two clinical
candidates,  trilaciclib  and  G1T38,  are  based  on  our  core  understanding  of  cyclin-dependent  kinases  4  and  6,  or  CDK4/6,  a  pair  of  proteins  that  play  an
important role in the growth and proliferation of all human cells.  G1T48 is a potential first-in-class oral Selective Estrogen Receptor Degrader, or SERD,
which we plan to develop as a single agent and in combination with other agents, including G1T38 for the treatment of ER-positive, or ER+, HER2- breast
cancer.  We own the global rights to all our product candidates.

G1 Therapeutics Product Pipeline

Candidate

  Target

   MOA

Clinical Status

Global Rights

trilaciclib

CDK4/6

Short-acting IV CDK4/6 inhibitor
Preserves HSPCs, enhances immune system function

  Phase 2

G1T38

CDK4/6

  Oral CDK4/6 inhibitor

Stops tumor proliferation and growth

G1T48

Estrogen Receptor

Oral Selective Estrogen Receptor Degrader (SERD)
Inhibits estrogen receptor driven tumor proliferation

  Phase 1/2

  Open IND

Trilaciclib: our novel approach to preserve HSPCs from damage by chemotherapy

Trilaciclib  is  a  potential  first-in-class,  short-acting  CDK4/6  inhibitor  which  we  are  developing  to  be  administered  intravenously  prior  to  chemotherapy.  In
preclinical studies, administration of trilaciclib prior to chemotherapy has been shown to induce transient cell-cycle arrest of HSPCs, protect HSPCs from
chemotherapy-induced  damage,  preserve  bone  marrow  and  immune  system  function,  protect  against  bone  marrow  exhaustion,  improve  complete  blood
counts (CBC) recovery, prevent myeloid skewing and consequent lymphopenia, and enhance T-cell effector function in the tumor microenvironment.

Ongoing Phase 1b/2a clinical trial in first-line treatment of SCLC

In 2015, we initiated a Phase 1b/2a clinical trial in first-line extensive-stage SCLC patients across multiple sites in the United States and Europe. The Phase
1b segment of the trial was designed to confirm the trilaciclib dose to be used in the randomized, placebo-controlled Phase 2a segment. The goals of the trial
are to evaluate the safety, myelopreservation, pharmacokinetics, and anti-tumor activity of trilaciclib in combination with the existing first-line chemotherapy
standard  of  care  regimen  of  etoposide  and  carboplatin  and  to  confirm  the  dose  to  be  used  in  future  trials.  All  patients  in  the  Phase  1b  segment  were
administered  three-week  cycles  of  trilaciclib  plus  etoposide/carboplatin,  with  an  estimated  four  to  six  cycles  administered  in  total  per  patient  based  on
historical practice. Trilaciclib was administered as an IV infusion prior to every dose of etoposide/carboplatin.

In the Phase 1b section of this trial, as reported at the American Society of Clinical Oncology meetings in June 2017, we treated 19 patients with multiple
cycles of trilaciclib and chemotherapy and did not have a single episode of febrile neutropenia – one of the most

53

 
 
 
   
   
  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
common adverse consequences of these chemotherapy regimens. We also observed a dose dependent reduction in grade 3/4 hematologic adverse events.  The
results from the Phase 1b study support the hypothesis that trilaciclib could ameliorate the significant acute and long-term consequences of chemotherapy-
induced myelosuppression by preserving hematopoietic and immune system function. Based on these results, we initiated the randomized, placebo-controlled
Phase 2a segment of the trial in fourth-quarter of 2016 with a trilaciclib dose of 240 mg/m2 and completed enrollment of a total of 77 patients in the second
quarter of 2017. We expect to update the data from the Phase 1b segment of the trial and to report preliminary data from the Phase 2a segment of the trial in
March 2018.

Ongoing Phase 1b/2a clinical trial in second/third-line treatment of SCLC

In  2015,  we  initiated  a  Phase  1b/2a  clinical  trial  in  second/third-line  SCLC  patients  across  multiple  sites  in  the  United  States  and  Europe.  The  Phase  1b
segment of the trial was designed to confirm the trilaciclib dose to be used in the randomized, placebo-controlled Phase 2a segment of the trial. The goals of
the  trial  are  to  evaluate  the  safety,  myelopreservation,  PK,  and  anti-tumor  activity  of  trilaciclib  in  combination  with  the  existing  second/third-line
chemotherapy  standard  of  care  regimen  of  topotecan  and  to  confirm  the  dose  to  be  used  in  future  trials.  All  patients  in  the  Phase  1b  segment  were
administered three-week cycles of trilaciclib plus topotecan until the progression of disease. Trilaciclib was administered as an IV infusion prior to every dose
of topotecan. Trilaciclib doses of 200 to 280 mg/m2 and topotecan doses of 0.75 to 1.5 mg/m2 were tested across 7 cohorts in the completed Phase 1b open-
label segment of the trial. Upon completion of the Phase 1b segment of the trial, the doses chosen for the randomized, placebo-controlled Phase 2a segment of
this trial are trilaciclib 240 mg/m2 + topotecan 0.75 mg/m2 and trilaciclib 240 mg/m2 + topotecan 1.5 mg/m2.

In  the  Phase  1b  segment  we  treated  32  patients  with  trilaciclib  and  topotecan  without  any  episodes  of  febrile  neutropenia  or  treatment  related
SAEs.  Preliminary results from the Phase 1b were reported at the IASCLC World Conference on Lung Cancer in December 2016, and based on these results
the Phase 2a segment of the trial was initiated in the first quarter of 2017 and consists of a double blind-design with approximately 90 patients randomized on
a 2:1 basis to receive trilaciclib plus topotecan, or placebo plus topotecan. We plan to complete enrollment in this trial in the second quarter of 2018. We
expect to update the data from the Phase 1b segment of the trial and to report preliminary data from the Phase 2a segment of the trial in the fourth quarter of
2018.

Ongoing Phase 2 clinical trial in Triple Negative Breast Cancer (TNBC)

In  January  2017,  we  initiated  an  open  label,  randomized,  Phase  2  trial  that  is  expected  to  enroll  approximately  90  patients  with  first,  second  or  third-line
metastatic TNBC across multiple sites in the United States and Europe. The goals of the clinical trial are to evaluate the safety, myelopreservation, PK, and
anti-tumor activity of trilaciclib in combination with the existing chemotherapy standard of care regimen of gemcitabine and carboplatin. We expect to fully
enroll this trial in the second-quarter of 2018 and report preliminary data in the fourth-quarter of 2018.

Ongoing Phase 2 clinical trial in first-line treatment of SCLC with a checkpoint inhibitor

In December 2016, we entered into a non-exclusive agreement with Genentech to evaluate the combination of Genentech's immune checkpoint, anti-PD-L1
antibody Tecentriq with trilaciclib. Our first trial under the agreement is in first-line treatment for patients with extensive stage SCLC receiving carboplatin
and etoposide.  We initiated enrollment in this randomized, double-blinded, placebo-controlled Phase 2 trial in the second quarter of 2017.  The goals of the
clinical  trial  are  to  evaluate  the  safety,  overall  survival,  myelopreservation,  PK,  and  anti-tumor  activity  of  trilaciclib  in  combination  with  a  checkpoint
inhibitor Tecentriq and chemotherapy.  We completed enrollment in the first quarter of 2018.

G1T38: Our potential best-in-class CDK4/6 inhibitor for patients with CDK4/6-dependent tumors

G1T38, our second clinical-stage candidate, is a potential best-in-class oral CDK4/6 inhibitor, to be used in combination with other targeted therapies to treat
multiple cancers. We rationally designed G1T38 to improve upon and address the shortcomings of the approved CDK4/6 inhibitors Ibrance®, Kisqali® and
Verzenio®. Our preclinical data and early human clinical data indicate the potential for continuous daily dosing, less dose-limiting neutropenia, and improved
tolerability. A Phase 1 trial of G1T38 in 75 healthy volunteers showed a favorable safety profile, and we initiated a Phase 1b/2a trial in ER+, HER2- breast
cancer in January 2017. Our plans for G1T38 include combinations in other cancers, such as non-small cell lung cancer, or NSCLC, where we expect to begin
a  Phase  1b/2  trial  in  March  2018  in  combination  with  the  epidermal  growth  factor  receptor  (EGFR)  inhibitor,  Tagrisso®.  We  believe  that  G1T38  has  the
potential to be the backbone therapy of multiple combination targeted therapy regimens.

54

 
  
 
Completed Phase 1 clinical trial

In the fourth quarter of 2016, we completed a Phase 1 clinical trial of G1T38 in 75 healthy volunteers in the Netherlands. This was a single ascending dose,
placebo-controlled trial testing doses of 3 to 600 mg. In addition, G1T38 was dosed at 200 and 300 mg twice a day, 300 mg with and without food, and 300
mg as an oral solution. The goals of the clinical trial were to obtain PK and safety data to inform appropriate starting dose(s) for studies in patients. There
were no DLTs, SAEs, or grade 3/4 AEs reported in this study. The most common grade 1/2 AEs were gastrointestinal in nature (such as diarrhea, nausea or
vomiting). A fed/fasted cohort demonstrated that taking G1T38 after a meal did not result in any nausea and that food had no effect on PK. Therefore, we
plan to dose G1T38 with food in all upcoming studies.

Ongoing Phase 1b/2a clinical trial in ER+, HER2- breast cancer

In January 2017, we initiated a Phase 1b/2a trial in ER+, HER2- breast cancer patients in combination with Faslodex®, an FDA-approved SERD. The trial is
expected to enroll up to 100 patients in Europe. The goals of the clinical trial are to evaluate the safety, PK, and anti-tumor activity of G1T38 in combination
with Faslodex and to determine the dose to be used in future trials. The Phase 1b segment of the trial is open-label and consists of two arms, with G1T38
dosed continuously without a holiday, either once a day or twice a day in combination with Faslodex. Once the dose and schedule have been determined, the
Phase 2a segment will enroll approximately 30 patients at the recommended G1T38 dose and schedule in combination with Faslodex. All patients in the trial
are  being  administered  G1T38  orally  continuously  without  a  treatment  holiday  and  IM  Faslodex  per  the  label.  Tumor  lesions  are  being  assessed  under
RECIST criteria by CT scans or MRI every 8 weeks.

Early clinical data from the first 24 patients enrolled in the trial suggest that G1T38 may be able to address the shortcomings of the other CDK4/6 inhibitors.
G1T38 has a shorter half-life and larger volume of distribution than Ibrance and Kisqali and is not expected to show drug accumulation. All of the enrolled
patients had a decline in neutrophil counts, which is expected and due to a mechanism-based decrease in neutrophil production caused by G1T38, which also
occurs with other CDK4/6 inhibitors such as Ibrance and Kisqali. No cardiovascular or liver side effects have been reported so far and there have been no
G1T38-related SAEs. The incidence of GI AEs reported so far are similar to Ibrance and Kisqali and less than Verzenio. These early clinical data indicate the
potential for continuous daily dosing of G1T38 without a holiday in combination with Faslodex, and the potential for improved tolerability compared to other
CDK4/6 inhibitors.

G1T48: Our oral SERD

G1T48, is a potential first/best in-class oral SERD, which we plan to initially develop as a single agent and in combination with G1T38 for the treatment of
ER+,  HER2-  breast  cancer.  We  believe  we  are  in  a  unique  position  as  the  only  emerging  biopharmaceutical  company  with  a  wholly  owned,  proprietary
combination of a SERD and an oral CDK4/6 inhibitor, a validated regimen in ER+, HER2- breast cancer. Based on compelling preclinical efficacy and safety
data, we filed an Investigational New Drug application (IND) with the U.S. Food and Drug Administration (FDA) in the fourth quarter of 2017. With the IND
now open, we expect to initiate a clinical trial in the second quarter of 2018.

We plan to initiate a Phase 1/2a clinical trial in the second quarter of 2018 with the goal of evaluating the safety, tolerability and PK of the drug in breast
cancer patients.

Financial Overview

Since our inception in 2008, we have devoted substantially all of our resources to synthesizing, acquiring, testing and developing our product candidates,
including  conducting  preclinical  studies  and  clinical  trials  and  providing  general  and  administrative  support  for  these  operations  as  well  as  securing
intellectual property protection for our product candidates. We do not have any products approved for sale and have not generated any revenues from product
sales. We recorded $0 million, $0 million and $0.5 million of revenue for the years ended December 31, 2017, 2016 and 2015, respectively. We do not expect
to generate revenue in the foreseeable future. To date, we have financed our operations primarily through the IPO and private placements of convertible debt
and equity securities.  From inception through December 31, 2017, we raised an aggregate of $213.9 million to fund our operations.

On May 22, 2017, we closed our IPO of 7,781,564 shares of common stock at a public offering price of $15 per share, including 781,564 shares of common
stock issued upon exercise by the underwriters of their option to purchase additional shares.  The gross proceeds from the IPO were $116.7 million and net
proceeds were $107.1 million, after deducting underwriting discounts and commissions and other offering expenses payable by us.

As  of  December  31,  2017,  we  had  cash  and  cash  equivalents  of  $103.8  million.  Since  inception,  we  have  incurred  net  losses.  Our  net  losses  were
$60.1 million, $30.3 million and $20.3 million for the years ended December 31, 2017, 2016 and 2015, respectively. As of

55

 
 
December 31, 2017, we had an accumulated deficit of $129.1 million. Substantially all of our net losses have resulted from costs incurred in connection with
our  research  and  development  programs  and  from  general  and  administrative  expenses  associated  with  our  operations.  We  expect  to  continue  to  incur
significant  expenses  and  increasing  operating  losses for the  foreseeable  future.  We  expect  our  expenses  will  increase  substantially  in  connection  with  our
ongoing activities as we:

•

•

•

•

•

•

•

•

•

•

continue  development  of  our  product  candidates,  including  initiating  additional  clinical  trials  of  trilaciclib  and  G1T38  and  completing
preclinical studies and potentially initiating clinical trials of our preclinical-stage product candidate, G1T48;

identify and develop new product candidates;

seek marketing approvals for our product candidates that successfully complete clinical trials;

establish a sales, marketing and distribution infrastructure to commercialize any products for which we may obtain marketing approval;

achieve market acceptance of our product candidates in the medical community and with third-party payors;

maintain, expand and protect our intellectual property portfolio;

hire additional personnel;

enter into collaboration arrangements, if any, for the development of our product candidates or in-license other products and technologies;

add operational, financial and management information systems and personnel, including personnel to support our product development and
planned future commercialization efforts; and

incur increased costs as a result of operating as a public company.

License agreement with the University of Illinois

In  November  2016,  we  entered  into  a  license  agreement  with  the  University  of  Illinois,  or  UIC,  pursuant  to  which  we  obtained  an  exclusive,  worldwide
license to make, have made, use, import, sell and offer for sale SERDs, including G1T48, covered by certain patent rights owned UIC. The rights licensed to
us are for all fields of use. Under the terms of the agreement we paid a one-time only, non-refundable upfront fee of $0.5 million, and are required to pay UIC
low single-digit royalties on all net sales of products and a share of any sublicensing revenues. We are also obligated to pay annual maintenance fees, which
are  fully  creditable  against  any  royalty  payments  made  by  us.  We  may  also  be  required  to  pay  UIC  milestone  payments  of  up  to  an  aggregate  of
$2.625 million related to the initiation and execution of clinical trials and first commercial sale of a product in multiple countries. We are responsible for all
future patent prosecution costs. See “Business—Intellectual Property—Exclusive License for G1T48.”

Financial operations overview

Revenues

To date, we have not generated any revenues from the commercial sale of approved products or out-licensing of our product candidates, and we do not expect
to generate substantial revenue from the commercial sale of our products for the foreseeable future, if ever. In the future, we will seek to generate revenue
primarily  from  product  sales  and,  potentially,  regional  or  global  collaborations  with  strategic  partners.  We  have  received  all  of  our  revenues  to  date  from
government grants related to our research.

Operating expenses

We  classify  our  operating  expenses  into  two  categories:  research  and  development  and  general  and  administrative  expenses.  Personnel  costs,  including
salaries,  benefits,  bonuses  and  stock-based  compensation  expense,  comprise  a  significant  component  of  each  of  these  expense  categories.  We  allocate
expenses associated with personnel costs based on the nature of work associated with these resources.

Research and Development Expenses

The largest component of our total operating expenses since inception has been research and development activities, including the preclinical and clinical
development of our product candidates.

Research and development costs are expensed as incurred. Our research and development expense primarily consists of:

•

salaries and personnel-related costs, including bonuses, benefits and any stock-based compensation, for our scientific personnel performing or
managing out-sourced research and development activities;

56

 
 
 
 
 
 
 
 
 
 
 
•

•

•

•

•

•

costs incurred under agreements with contract research organizations and investigative sites that conduct preclinical studies and clinical trials;

costs related to manufacturing pharmaceutical active ingredients and drug products for preclinical studies and clinical trials;

costs related to upfront and milestone payments under in-licensing agreements;

fees paid to consultants and other third parties who support our product candidate development;

other costs incurred in seeking regulatory approval of our product candidates; and

allocated facility-related costs and overhead.

The successful development of our product candidates is highly uncertain. Product candidates in later stages of clinical development generally have higher
development  costs  than  those  in  earlier  stages  of  clinical  development,  primarily  due  to  the  increased  size  and  duration  of  later-stage  clinical  trials.
Accordingly, we expect research and development costs to increase significantly for the foreseeable future as programs progress. However, we do not believe
that it is possible at this time to accurately project total program-specific expenses through commercialization. We are also unable to predict when, if ever,
material net cash inflows will commence from our product candidates to offset these expenses. Our expenditures on current and future preclinical and clinical
development  programs  are  subject  to  numerous  uncertainties  in  timing  and  cost  to  completion.  The  duration,  costs  and  timing  of  clinical  trials  and
development of our product candidates will depend on a variety of factors including:

•

•

•

•

•

•

•

the scope, rate of progress, and expenses of our ongoing as well as any additional clinical trials and other research and development activities;

future clinical trial results;

achievement of milestones requiring payments under our in-licensing agreements;

uncertainties in clinical trial enrollment rates or drop-out or discontinuation rates of patients;

potential additional studies requested by regulatory agencies;

significant and changing government regulation; and

the timing and receipt of any regulatory approvals.

We track research and development expenses on a program-by-program basis only for clinical-stage product candidates. Preclinical research and development
expenses  and  chemical  manufacturing  research  and  development  expenses  are  not  assigned  or  allocated  to  individual  development  programs.  In  2015,
trilaciclib  was  our  only  clinical-stage  product  candidate.  In  2016,  we  had  two  clinical-stage  product  candidates,  trilaciclib  and  G1T38.    In  2017,  we  had
ongoing clinical trials for two of our product candidates, trilaciclib and G1T38, and we incurred costs related to our G1T48 product candidate as we prepared
to initiate a clinical trial in 2018.

General and administrative expenses

General and administrative expenses consist of personnel costs, allocated expenses and other expenses for outside professional services, including legal, audit
and  accounting  services.  Personnel  costs  consist  of  salaries,  bonuses,  benefits  and  stock-based  compensation.  Other  general  and  administrative  expenses
include  facility-related  costs  not  otherwise  allocated  to  research  and  development  expense,  professional  fees,  expenses  associated  with  obtaining  and
maintaining patents and costs of our information systems. We anticipate that our general and administrative expenses will continue to increase in the future as
we increase our headcount to support our continued research and development and potential commercialization of our product candidates.

We  expect  to  continue  to  incur  additional  general  and  administrative  expenses  in  2018  as  we  support  continued  research  and  development  activities  and
support our operations in a public company environment, including expenses related to compliance with the rules and regulations of the SEC and Nasdaq,
additional insurance expenses, and expenses related to investor relations activities and other administration and professional services.

Total other income (expense), net

Total other income (expense), net consists of interest income earned on cash and cash equivalents and the change in fair value of warrant liabilities and other
liabilities.

Income taxes

To date, we have not been required to pay U.S. federal or state income taxes because we have not generated taxable income.

57

 
 
 
 
 
 
 
 
 
 
 
 
 
Critical accounting policies and significant judgments and estimates

This discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been prepared in accordance
with U.S. generally accepted accounting principles. The preparation of our financial statements requires us to make estimates and assumptions that affect the
reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported
expenses  incurred  during  the  reporting  periods.  Our  estimates  are  based  on  our  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 may differ from these estimates under different assumptions or conditions.

While our significant accounting policies are more fully described in the notes to our financial statements appearing elsewhere in this Annual Report, we
believe  that  the  following  accounting  policies  are  critical  to  the  process  of  making  significant  judgments  and  estimates  in  the  preparation  of  our  financial
statements and understanding and evaluating our reported financial results.

Accrued research and development expenses

As  part  of  the  process  of  preparing  our  financial  statements,  we  are  required  to  estimate  and  accrue  expenses,  the  largest  of  which  is  related  to  accrued
research and development expenses. This process for estimating and accruing expenses involves reviewing contracts and purchase orders, identifying services
that have been performed on our behalf, and estimating the level of service performed and the associated cost incurred for the service when we have not yet
been invoiced or otherwise notified of the actual costs.

Costs for preclinical study and clinical trial activities are recognized based on an evaluation of our vendors’ progress towards completion of specific tasks,
using data such as patient enrollment, clinical site activations or information provided to us by our vendors regarding their actual costs incurred. Payments for
these  activities  are  based  on  the  terms  of  individual  contracts  and  payment  timing  may  differ  significantly  from  the  period  in  which  the  services  were
performed. We determine accrual estimates through reports from and discussions with applicable personnel and outside service providers as to the progress or
state  of  completion  of  trials,  or  the  services  completed.  Our  estimates  of  accrued  expenses  as  of  each  balance  sheet  date  are  based  on  the  facts  and
circumstances known at the time.

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

Warrant liability

Warrants to purchase our preferred stock have been classified as liabilities and recorded at their estimated fair value. In each reporting period, any change in
fair value of the warrants has been recorded as expense in the case of an increase in fair value and income in the case of a decrease in fair value. We used
significant assumptions in estimating the fair value of our warrant liability including the estimated volatility, risk free interest rate, estimated fair value of our
redeemable convertible preferred shares and the estimated life of the warrant. These assumptions were used in our option pricing method and the probability
weighted expected return method, a blend of which were considered in establishing fair value. As of December 31, 2017, we have no outstanding warrants.

Series B purchase option liability

The option to purchase shares of Series B redeemable convertible preferred stock in a second tranche has been accounted for as a free-standing instrument
and classified as a liability. On February 4, 2015, upon purchase of the first tranche of Series B Preferred Stock, the option to purchase additional shares was
recorded at its fair value, with the remaining cash proceeds received on that date allocated to Series B Preferred Stock. As the value of the option to purchase
shares in the second tranche increased over time, a change in the fair value of the liability was recorded as “Change in fair value of Series B purchase option
liability”  in  the  accompanying  statement  of  operations.  This  free-standing  instrument  was  exercised  on  December  10,  2015  when  the  right  to  require  the
purchase of the second tranche shares by the holders of the outstanding shares of Series B Preferred Stock was exercised, resulting in an outstanding liability
of zero on December 31, 2017 and 2016.

Stock-based compensation

We  account  for  stock-based  compensation  awards  in  accordance  with  Financial  Accounting  Standards  Board  (FASB)  Accounting  Standards  Codification
(ASC) Topic 718, Compensation—Stock Compensation, or ASC 718. ASC 718 requires all stock-based

58

payments to employees, including grants of employee stock options, to be recognized in the statement of operations based on their fair values. Our stock-
based compensation awards have historically consisted of stock options.

We recognize compensation costs related to stock options granted to employees based on the estimated fair value of the awards on the date of grant, net of
estimated  forfeitures.  We  estimate  the  grant  date  fair  value,  and  the  resulting  stock-based  compensation  expense,  using  the  Black-Scholes  option-pricing
model. The grant date fair value of the stock-based awards is generally recognized on a straight-line basis over the requisite service period, which is generally
the vesting period of the respective awards.

We recognize compensation costs related to stock options granted to non-employees based on the estimated fair value of the awards on the date of grant in the
same manner as we do options for employees; however, the fair value of the stock options granted to non-employees is re-measured each reporting period
until the service is complete, and the resulting increase or decrease in value, if any, is recognized as expense or income, respectively, during the period the
related services are rendered.

We recorded non-cash stock-based compensation expense for employee and non-employee stock option grants of $3.4 million, $1.4 million and $0.4 million
for the years ended December 31, 2017, 2016 and 2015, respectively.

We  calculate  the  fair  value  of  stock  options  using  the  Black-Scholes  option-pricing  model.  The  Black-Scholes  option-pricing  model  requires  the  use  of
subjective assumptions, including the expected volatility of our common stock, the assumed dividend yield, the expected term of our stock options, the risk-
free interest rate for a period that approximates the expected term of our stock options, and the fair value of the underlying common stock on the date of grant.
In applying these assumptions, we considered the following factors:

•

•

•

•

•

we do not have sufficient history to estimate the volatility of our common stock; we calculate expected volatility based on reported data for
selected similar publicly traded companies for which the historical information is available; we plan to continue to use the guideline peer group
volatility information until the historical volatility of our common stock is sufficient to measure expected volatility for future option grants;

the assumed dividend yield of zero is based on our expectation of not paying dividends for the foreseeable future;

our estimates of expected term used in the Black-Scholes option-pricing model were based on the estimated time from the grant date to the date
of exercise;

we determine the risk-free interest rate by reference to implied yields available from U.S. Treasury securities with a remaining term equal to the
expected life assumed at the date of grant; and

we estimate forfeitures based on our historical analysis of actual stock option forfeitures. To date, we have had minimal forfeitures, accordingly,
we have assumed no forfeiture rate.

See  “Note  8  –  Stock  Option  Plan”  to  the  accompanying  audited  financial  statements  included  in  Item  15  of  this  Annual  Report  for  the  weighted  average
assumptions used in the Black-Scholes option-pricing model for awards granted in the years ended December 31, 2017, 2016 and 2015.

Prior  to  our  initial  public  offering,  the  fair  value  of  our  common  shares  underlying  our  stock  options  was  estimated  on  each  grant  date  by  our  board  of
directors. In order to determine the fair value of our common shares underlying granted stock options, our board of directors considered, among other things,
timely  valuations  of  our  common  shares  prepared  by  an  unrelated  third-party  valuation  firm  in  accordance  with  the  guidance  provided  by  the  American
Institute of Certified Public Accountants Practice Guide, Valuation of Privately-Held-Company Equity Securities Issued as Compensation.

Given  the  absence  of  a  public  trading  market  for  our  common  shares,  our  board  of  directors  exercised  reasonable  judgment  and  considered  a  number  of
objective and subjective factors to determine the best estimate of the fair value of our common shares, including (1) our business, financial condition and
results  of  operations,  including  related  industry  trends  affecting  our  operations;  (2)  our  forecasted  operating  performance  and  projected  future  cash  flows;
(3) the illiquid nature of our common shares; (4) liquidation preferences and other rights and privileges of our common shares; (5) market multiples of our
most comparable public peers and (6) market conditions affecting our industry.

In  connection  with  our  2015  audit,  we  reassessed  the  determination  of  the  fair  value  of  the  common  shares  underlying  1,607,119  stock  options  granted
throughout 2015. As a result, we determined that the fair value of the common shares in 2015 increased from $0.30 per common share at January 31, 2015 to
$3.72  per  common  share  at  December  31,  2015,  which  was  higher  than  the  fair  value  per  share  as  initially  determined  by  the  board  of  directors  on  the
respective  grant  dates  of  February  27,  2015,  July  15,  2015  and  September  7,  2015.  The  use  of  this  higher  share  price  increased  both  recognized  and
unrecognized share-based compensation expense.

59

 
 
 
 
 
 
 
In 2017, in connection with our IPO  and  after  discussions  with  our  underwriters,  we  reassessed  the  determination  of  the  fair  value  of  the  common  shares
underlying the 1,099,320 stock options granted throughout 2016, and the 119,997 options granted up through our IPO date of May 16, 2017, and determined
that no adjustment was necessary.

Since our IPO, our board of directors has determined the fair value of each common share underlying share-based awards based on the closing price of our
common shares as reported by the Nasdaq on the date of grant.

Income taxes

We recognize deferred income taxes for temporary differences between the basis of assets and liabilities for financial statement and income tax purposes. We
periodically evaluate the positive and negative evidence bearing upon the ability to realize our deferred tax assets. Based upon the weight of the available
evidence, which includes historical operating performance, reported cumulative net losses since inception and difficulty in accurately forecasting our future
results, we maintained a full valuation allowance on the net deferred tax assets for all periods presented. We intend to maintain a full valuation allowance on
the U.S. deferred tax assets for the foreseeable future until sufficient positive evidence exists to support reversal of the valuation allowance.

As of December 31, 2017, we had federal and state operating loss carryforwards of approximately $100.8 million, available to reduce future taxable income
that will begin to expire in 2028. As of December 31, 2017, we also had research and development tax credit carryforwards of approximately $3.3 million for
federal purposes available to offset future income tax. If not utilized, the federal carryforwards will expire in various amounts beginning in 2034.

Utilization  of  the  net  operating  loss  carryforwards  may  be  subject  to  a  substantial  annual  limitation  due  to  the  ownership  change  limitations  provided  by
Section  382  of  the  Internal  Revenue  Code  of  1986,  as  amended,  and  similar  state  provisions.  The  annual  limitation  may  result  in  the  expiration  of  net
operating losses and credits before utilization. An analysis to determine the limitation of the net operating loss carryforwards has not been performed.

On December 22, 2017, the Tax Cuts and Jobs Act (“Tax Act”) was signed into law. The Tax Act lowered the Federal corporate tax rate from 34% to 21%
and made numerous other tax law changes. The Company has measured deferred tax assets at the enacted tax rate expected to apply when these temporary
differences are expected to be realized or settled.  U.S. GAAP requires companies to recognize the effect of tax law changes in the period of enactment. 
Reasonable estimates were made based on the Company’s analysis of the Tax Act. These provisional amounts may be adjusted during 2018 when additional
information is obtained. Additional information that may affect our provisional amounts would include further clarification and guidance on how the Internal
Revenue Service will implement the Tax Act, including guidance with respect to guidance on how state taxing authorities will implement tax reform and the
related  effect  on  our  state  income  tax  returns,  completion  of  our  2017  tax  return  filings,  and  the  potential  for  additional  guidance  from  the  Financial
Accounting  Standards  Board  related  to  the  Tax  Act.  Under  the  Tax  Act,  NOLs  arising  after  December  31,  2017  may  be  carried  forward  indefinitely.
However, for NOLs arising after December 31, 2017, NOL carryforwards will be limited to 80% of taxable income. Our NOLs generated in 2017 and in
prior years will not be subject to the limitations under the Tax Act.

Results of operations

Comparison of the year ended December 31, 2017 and December 31, 2016

Revenue
Operating Expenses:

Research and Development
General and Administrative

Total Operating Expenses

Loss from Operations
Other Income
Net Loss

Year Ended December 31,
2016
2017
(in thousands)

Change
$

  $

—     $

—     $

— 

53,881      
7,087      
60,968      
(60,968 )    
847      
(60,121 )   $

25,161      
5,230      
30,391      
(30,391 )    
100      
(30,291 )   $

28,720 
1,857 
30,577 
(30,577)
747 
(29,830)

  $

Revenue

Revenue was $0 for the years ended December 31, 2017 and December 31, 2016.

60

 
 
 
 
 
   
 
 
 
   
   
 
 
 
 
   
       
       
  
   
   
   
   
   
 
Research and development

Research and development expenses were $53.9 million for the year ended December 31, 2017 as compared to $25.2 million for the year ended December 31,
2016. The increase of $28.7 million, or 114%, was primarily due to an increase of $16.3 million in our clinical program costs which reflects increased costs in
our ongoing clinical trials and initiation of our trial in SCLC with Tecentriq, as well as increased headcount-related expenses to support these trials.  The
increase in research and development expenses was also due to an increase in costs for manufacturing of pharmaceutical active ingredient and drug product to
support our clinical trials and an increase in external costs related to preclinical development. The following table summarizes our research and development
expenses allocated to trilaciclib, G1T38 and G1T48, and unallocated research and development expenses for the periods indicated:

Clinical Expenses—trilaciclib
Clinical Expenses—G1T38
Clinical Expenses—G1T48
Chemical Manufacturing and Development
Discovery and Pre-clinical Expenses
Total Research and Development Expenses

Year Ended December 31,
2016
2017

(in thousands)

26,801     $
4,336      
366      
13,142      
9,236      
53,881     $

11,693 
3,504 
— 
4,967 
4,997 
25,161

  $

  $

General and administrative

General and administrative expenses were $7.1 million for the year ended December 31, 2017 as compared to $5.2 million for the year ended December 31,
2016. The increase of $1.9 million, or 36%, was due to an increase of $1.4 million in personnel related costs as a result of headcount-related costs, an increase
of  $1.5  million  in  professional  services,  insurance,  board  compensation  and  other  administrative  costs  necessary  to  support  our  operations  as  a  public
company and offset by a decrease of $1.0 million in transaction related costs from our deferred public offering.

Total other income (expense), net

Total other income, net was $0.8 million for the year ended December 31, 2017 as compared to $0.1 million for the year ended December 31, 2016. The
increase in income of $0.7 million was due to additional interest income earned on a higher balance of money market funds during the year ended December
31, 2017 as compared to the year ended December 31, 2016.

Comparison of the year ended December 31, 2016 and December 31, 2015

Revenue
Operating Expenses:

Research and Development
General and Administrative

Total Operating Expenses

Loss from Operations
Other Income
Net Loss

Year Ended December 31,
2015
2016
(in thousands)

Change
$

  $

—     $

522     $

(522)

25,161      
5,230      
30,391      
(30,391 )    
100      
(30,291 )   $

12,730      
3,216      
15,946      
(15,424 )    
(4,839 )    
(20,263 )   $

12,431 
2,014 
14,445 
(14,967)
4,939 
(10,028)

  $

Revenue

Revenue was $0 for the year ended December 31, 2016 as compared to $0.5 million for the year ended December 31, 2015. The decrease of $0.5 million was
due to the expiration of existing government grants in 2015. We have not applied for new government grants and do not expect any additional grant revenue
in the near future.

61

 
 
 
 
 
 
   
 
 
 
 
   
   
   
   
 
 
 
 
 
 
 
   
 
 
 
   
   
 
 
 
 
 
 
       
       
  
 
 
 
 
 
 
 
 
 
 
 
Research and development

Research and development expenses were $25.2 million for the year ended December 31, 2016 as compared to $12.7 million for the year ended December 31,
2015. The increase of $12.4 million, or 98%, was primarily due to an increase of $10.3 million in our clinical program costs which included increased costs in
our ongoing trials of trilaciclib in SCLC and initiation costs for a Phase 2 clinical trial of trilaciclib in TNBC and preparation for a trial of G1T38 in ER+,
HER2- breast cancer. The increase in research and development expense is also due to an increase in connection with manufacturing of pharmaceutical active
ingredient and drug product to support our clinical trials, an increase in personnel-related costs as a result of increased headcount and fees paid to consultants,
an increase in license fees and an increase in supplies and facility costs, offset in part by a decrease in external costs related to the selection of compounds for
development  and  preclinical  development  of  G1T38  and  G1T48.  The  following  table  summarizes  our  research  and  development  expenses  allocated  to
trilaciclib and G1T38 and unallocated research and development expenses for the periods indicated:

Clinical Expenses—trilaciclib
Clinical Expenses—G1T38
Clinical Expenses—G1T48
Chemical Manufacturing and Development
Discovery and Pre-clinical Expenses
Total Research and Development Expenses

Year Ended December 31,
2015
2016

(in thousands)

11,693     $
3,504      
—      
4,967      
4,997      
25,161     $

4,889 
— 
— 
2,688 
5,153 
12,730

  $

  $

General and administrative

General and administrative expenses were $5.2 million for the year ended December 31, 2016 as compared to $3.2 million for the year ended December 31,
2015. The increase of $2.0 million, or 63%, was due to an increase of $1.0 million of transaction related costs from our deferred initial public offering, an
increase  of  $0.6  million  in  personnel  costs  as  a  result  of  increased  headcount  and  fees  paid  to  consultants  and  an  increase  of  $0.4  million  in  general  and
intellectual property legal expenses.

Total other income (expense), net

Total other income (expense), net was $0.1 million for the year ended December 31, 2016 as compared to $(4.8) million for the year ended December 31,
2015. The decrease in expense of $4.9 million was due to the change in fair value of the Series B purchase option liability in 2015 and no equivalent expense
in 2016, the change in the fair value of the warrant liability and an increase in interest income.

Liquidity and Capital Resources   

We  have  incurred  significant  operating  losses  since  our  inception.  We  incurred  net  losses  of  $60.1  million  for  the  year  ended  December  31,  2017,  $30.3
million for the year ended December 31, 2016, and $20.3 million for the year ended December 31, 2015. As of December 31, 2017, we had an accumulated
deficit of $129.1 million. Our product candidates span a range from preclinical development to Phase 2 clinical trials, and it may be several years, if ever,
before  we  have  a  product  candidate  ready  for  commercialization.  To  date,  we  have  financed  our  operations  primarily  through  sales  of  our  preferred  and
common stock. We expect to continue to incur significant expenses and increasing operating losses for the foreseeable future.

As  of  December  31,  2017,  we  had  cash,  cash  equivalents  and  short-term  investments  of  $103.8  million.    We  believe  that  our  existing  cash  and  cash
equivalents will be sufficient to fund our projected cash needs for greater than 12 months following the filing of this Annual Report. In order to complete the
process of obtaining regulatory approval for our product candidates and to build the sales, marketing and distribution infrastructure that we believe will be
necessary to commercialize our product candidates, if approved, we will require substantial additional funding.

62

 
 
 
 
 
 
   
 
 
 
 
   
   
   
   
 
 
    Cash flows

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

Net cash used in operating activities
Net cash used in investing activities
Net cash provided by financing activities
Net increase in cash and cash equivalents

Net cash used in operating activities

2017

Year Ended December 31,
2016
(in thousands)

2015

  $

  $

(50,519 )   $
(294 )    

107,320  
56,507  

  $

(25,141 )   $
(250 )    

49,758  
24,367  

  $

(13,845)
(87)
33,176 
19,244

During the year ended December 31, 2017, net cash used in operating activities was $50.5 million, which consisted of a net loss of $60.1 million and net
changes in prepaids and other working capital adjustments of $0.1 million, partially offset by an increase of $6.3 million in accrued expenses and accounts
payable, primarily driven by increased research and development costs, and non-cash stock-based compensation charges of $3.4 million.

During the year ended December 31, 2016, net cash used in operating activities was $25.1 million, which consisted of a net loss of $30.3 million, partially
offset by an increase in accrued expenses and accounts payable of $3.4 million, related primarily increased in research and development activity during that
period, non-cash stock-based compensation charges of $1.4 million, and $0.4 million of other working capital adjustments.  

During the year ended December 31, 2015, net cash used in operating activities was $13.8 million, which consisted primarily of a net loss of $20.3 million,
partially  offset  by  $4.8  million  due  to  the  increase  in  fair  value  of  the  Series  B  purchase  option  liability,  and  a  change  in  accrued  expenses  and  accounts
payable of $1.7 million, related primarily to an increase in research and development activity during that period.

Net cash used in investing activities

Net cash used in investing activities was $0.3 million, $0.3 million and $0.1 million for the years ended December 31, 2017, 2016 and 2015, respectively.  

Net cash used in investing activities represented purchases of property and equipment, primarily associated with laboratory equipment and build out costs for
new office space.

Net cash provided by financing activities

During the year ended December 31, 2017, net cash provided by financing activities was $107.3 million, consisting of $107.1 million of net proceeds from
our IPO and $0.2 million of proceeds from the exercise of stock options and warrants.

During  the  year  ended  December  31,  2016,  net  cash  provided  by  financing  activities  was  $49.8  million,  consisting  of  $50.0  million  in  proceeds  from  the
issuance of Series C preferred stock, offset by $0.2 million of issuance costs.

During  the  year  ended  December  31,  2015,  net  cash  provided  by  financing  activities  was  $33.2  million,  consisting  of  $33.3  million  in  proceeds  from  the
issuance of Series B preferred stock, offset by $0.1 million of issuance costs.

Operating capital requirements and plan of operations

To date, we have not generated any revenue from product sales. We do not know when, or if, we will generate any revenue from product sales. We do not
expect to generate significant revenue from product sales unless and until we obtain regulatory approval of and commercialize one of our current or future
product candidates. We anticipate that we will continue to generate losses for the foreseeable future, and we expect the losses to increase as we continue the
development of and seek regulatory approvals for our product candidates, and begin to commercialize any approved products. We are subject to all of the
risks inherent in the development of new products, and we may encounter unforeseen expenses, difficulties, complications, delays and other unknown factors
that may adversely affect our business. We expect to incur additional costs associated with operating as a public company and we anticipate that we will need
substantial additional funding in connection with our continuing operations.

We believe that our existing cash and cash equivalents will be sufficient to fund our projected cash needs for greater than 12 months following the filing of
this Annual Report. In order to complete the process of obtaining regulatory approval for our product

63

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
candidates  and  to  build  the  sales,  marketing  and  distribution  infrastructure  that  we  believe  will  be  necessary  to  commercialize  our  product  candidates,  if
approved, we will require substantial additional funding.

We have based our projections of operating capital requirements on assumptions that may prove to be incorrect and we may use all of our available capital
resources  sooner  than  we  expect.  Because  of  the  numerous  risks  and  uncertainties  associated  with  research,  development  and  commercialization  of
pharmaceutical products, we are unable to estimate the exact amount of our operating capital requirements. Our future funding requirements will depend on
many factors, including, but not limited to:

•

•

•

•

•

•

•

•

•

•

•

the scope, progress, results and costs of nonclinical development, laboratory testing and clinical trials for our product candidates;

the scope, prioritization and number of our research and development programs;

the costs, timing and outcome of regulatory review of our product candidates;

the extent to which we enter into non-exclusive, jointly funded clinical research collaboration arrangements, if any, for the development of our
product candidates in combination with other companies’ products;

our ability to establish such collaborative co-development arrangements on favorable terms, if at all;

the achievement of milestones or occurrence of other developments that trigger payments under our license agreement and any collaboration
agreements into which we enter;

the extent to which we are obligated to reimburse, or entitled to reimbursement of, clinical trial costs under future collaboration agreements, if
any;

the extent to which we acquire or in-license product candidates and technologies, such as G1T48, and the terms of such in-licenses;

the  costs  of  future  commercialization  activities,  including  product  sales,  marketing,  manufacturing  and  distribution,  for  any  of  our  product
candidates for which we receive marketing approval;

revenue, if any, received from commercial sales of our product candidates, should any of our product candidates receive marketing approval;
and

the  costs  of  preparing,  filing  and  prosecuting  patent  applications,  maintaining  and  enforcing  our  intellectual  property  rights  and  defending
intellectual property-related claims.

Until  such  time,  if  ever,  as  we  can  generate  substantial  revenues,  we  expect  to  finance  our  cash  needs  through  a  combination  of  equity  offerings,  debt
financings, other third-party funding, marketing and distribution arrangements and other collaborations, strategic alliances and licensing arrangements. We do
not have any committed external source of funds. To the extent that we raise additional capital through the sale of equity or convertible debt securities, our
stockholders’ ownership interest will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect your rights
as  a  common  stockholder.  Debt  financing,  if  available,  may  involve  agreements  that  include  covenants  limiting  or  restricting  our  ability  to  take  specific
actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise funds through additional collaborations, strategic
alliances  or  licensing  arrangements  with  third  parties,  we  may  have  to  relinquish  valuable  rights  to  our  technologies,  future  revenue  streams,  research
programs or product candidates or to grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds when needed, we may
be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market product
candidates that we would otherwise prefer to develop and market ourselves.

Contractual obligations, commitments and contingencies

Our principal commitments consist of obligations under our clinical trial commitments, consulting fees and operating lease commitments. The following table
summarizes these contractual obligations as of December 31, 2017:

Contractual Obligations:
Operating lease obligations(1)

Total contractual obligations(2)

Total

Less than
1 Year

Payments due by period
1 to 3
Years
(in thousands)

3 to 5
Years

More Than
5 Years

  $
  $

1,561    $
1,561    $

294    $
294    $

615    $
615    $

652    $
652    $

— 
—

64

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
      
      
      
      
  
 
 
(1)

Represents future minimum lease payments under the non-cancelable lease for our headquarters in Research Triangle Park, NC. The minimum lease
payments above do not include any related common area maintenance charges or real estate taxes.

(2) We  enter  into  agreements  in  the  normal  course  of  business  with  contract  research  organizations  for  clinical  trials  and  with  vendors  for  preclinical
studies and other services and products for operating purposes which are cancelable at any time by us, generally upon 30-60 days prior written notice.
The  contractual  obligations  above  do  not  include  such  payments.  The  above  amounts  exclude  potential  payments  to  be  made  under  our  license
agreement for G1T48 with the University of Illinois that are based on the progress of G1T48, as these payments are not determinable.

In January 2018, we signed an amendment to lease additional office space in the same building as our existing office space. Payments on the additional space
are estimated to begin in July 2018 and continue until the lease expires on December 31, 2022.

Off-Balance sheet arrangements

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

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

We  are  exposed  to  market  risks  in  the  ordinary  course  of  our  business.  These  risks  primarily  include  interest  rate  sensitivities.  We  had  cash  and  cash
equivalents  of  $103.8  million  as  of  December  31,  2017,  which  consists  of  deposits  in  banks,  including  checking  accounts,  money  market  accounts  and
certificates of deposit. Such interest-earning instruments carry a degree of interest rate risk; however, historical fluctuations in interest income have not been
significant. We had no outstanding debt as December 31, 2017.

Item 8. Financial Statements and Supplementary Data.

The financial statements of G1 Therapeutics, Inc. are provided in Part IV, Item 15 in this Annual Report.

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

Not Applicable.

Item 9A. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

We  maintain  disclosure  controls  and  procedures  that  are  designed  to  ensure  that  information  required  to  be  disclosed  in  the  reports  that  we  file  or  submit
under the Securities and Exchange Act of 1934 is (i) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and
forms and (ii) accumulated and communicated to our management, including our principal executive officer and principal financial officer, to allow timely
decisions regarding required disclosure.

As of December 31, 2017, our management, with the participation of our principal executive officer and principal financial officer, 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).  Our  management
recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives,
and management necessarily applies its judgement in evaluating the cost-benefit relationship of possible controls and procedures.  Our principal executive
officer and principal financial officer have concluded based upon the evaluation described above that, as of December 31, 2017, our disclosure controls and
procedures were effective at the reasonable assurance level.

65

 
 
 
Changes in Internal Controls

There  were  no  changes  in  our  internal  control  over  financial  reporting,  identified  in  connection  with  the  evaluation  of  such  internal  control  that  occurred
during the fourth quarter of our last fiscal year that have materially affected, or are reasonably likely to materially affect, our internal control over financial
reporting.

Management’s Report on Internal Control Over Financial Reporting.
This Annual Report does not include a report of management’s assessment regarding internal control over financial reporting or an attestation report of our
independent  registered  public  accounting  firm  due  to  a  transition  period  established  by  the  rules  of  the  SEC  for  newly  public  companies.    We  are  an
“emerging  growth  company”  as  defined  in  the  JOBS  Act.    Commencing  with  the  Annual  Report  for  our  fiscal  year  ending  December  31,  2018,  we  will
include a report of management’s assessment regarding internal control over financial reporting.  For as long as we remain an “emerging growth company”
we are exempt from the auditor attestation requirement in the assessment of the effectiveness of our internal control over financial reporting through the end
of the fiscal year following the fifth anniversary of our IPO.

Item 9B. Other Information.

None.

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

The information required by this item is incorporated herein by reference from the Company’s Proxy Statement for the 2018 Annual Meeting of Stockholders,
which  will  be  filed  with  the  SEC  within  120  days  after  the  end  of  our  2017  fiscal  year  pursuant  to  Regulation  14A  for  our  2018  Annual  Meeting  of
Stockholders  (the  “Proxy  Statement”),  under  the  captions  “Management  and  Corporate  Governance,”  “Code  of  Conduct  and  Ethics,”  and  “Section  16(a)
Beneficial Ownership Reporting Compliance.”  

Item 11. Executive Compensation.

The  information  required  by  this  item  is  incorporated  herein  by  reference  from  the  Proxy  Statement  under  the  captions  “Executive  Officer  and  Director
Compensation” and “Management and Corporate Governance – Compensation Committee Interlocks and Insider Participation.”

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

The  information  required  by  this  item  is  incorporated  herein  by  reference  from  the  Proxy  Statement,  under  the  captions  “Security  Ownership  of  Certain
Beneficial Owners and Management” and “Equity Compensation Plan Information.”

Item 13. Certain Relationships and Related Transactions, and Director Independence.

The  information  required  by  this  item  is  incorporated  herein  by  reference  from  the  Proxy  Statement,  under  the  captions  “Management  and  Corporate
Governance” and “Certain Relationships and Related Person Transactions.”

Item 14. Principal Accounting Fees and Services.

The  information  required  by  this  item  is  incorporated  herein  by  reference  from  the  Proxy  Statement  under  the  caption  “Independent  Registered  Public
Accounting Firm”

66

 
 
 
 
 
 
 
 
 
 
 
 
 
PART IV

Item 15. Exhibits, Financial Statement Schedules.

The following documents are filed as part of this Annual Report:

(a)

Financial Statements. 

INDEX TO FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm

Balance Sheets as of December 31, 2017 and 2016

Statements of Operations for the Years ended December 31, 2017, 2016 and 2015

Statements of Stockholders’ Equity for the Years ended December 31, 2017, 2016 and 2015

Statements of Cash Flows for the Years ended December 31, 2017, 2016 and 2015

Notes to the Financial Statements

(b)

Financial Statement Schedules.

F-1

F-2

F-3

F-4

F-5

F-6

No financial statement schedules are provided because the information called for is not required or is shown either in the financial statements or notes.

(c)

Exhibits.

Exhibit
Number

3.1

3.2

4.1

4.2

10.1

10.2*

10.3*

10.4*

10.5*

Amended and Restated Certificate of Incorporation of G1 Therapeutics, Inc., dated as of May 22, 2017, filed as Exhibit 3.1 to the
Registrant’s Current Report on Form 8-K filed on May 26, 2017 (File No. 001-38096), and incorporated herein by reference.

Description

Amended and Restated Bylaws of G1 Therapeutics, Inc., dated as of May 22, 2017, filed as Exhibit 3.2 to the Registrant’s Current Report
on Form 8-K filed on May 26, 2017 (File No. 001-38096), and incorporated herein by reference.

Specimen Common Stock Certificate, filed as Exhibit 4.1 to the Registrant’s Second Amendment to the Registration Statement on Form S-
1 filed on May 8, 2017 (File No. 333-217285), and incorporated herein by reference.

Second Amended and Restated Registration Rights Agreement, dated as of April 27, 2016, by and among the Registrant and the
Stockholders listed therein, filed as Exhibit 4.6 to the Registrant’s Registration Statement on Form S-1 filed on April 13, 2017 (File No.
333-217285), and incorporated herein by reference.

Form of Indemnification Agreement, filed as Exhibit 10.1 to the Registrant’s Second Amendment to the Registration Statement on Form
S-1 filed on May 8, 2017 (File No. 333-217285), and incorporated herein by reference.

Sixth Amendment to G1 Therapeutics, Inc. 2011 Equity Incentive Plan, dated as of November 7, 2016, filed as Exhibit 10.2 to the
Registrant’s Registration Statement on Form S-1 filed on April 13, 2017 (File No. 333-217285), and incorporated herein by reference.

2017 Employee, Director and Consultant Equity Incentive Plan, filed as Exhibit 10.3 to the Registrant’s Second Amendment to the
Registration Statement on Form S-1 filed on May 8, 2017 (File No. 333-217285), and incorporated herein by reference.

Third Amendment to Executive Employment Agreement, by and between the Registrant and Mark A. Velleca, M.D., Ph.D., dated May 19,
2014, as amended on February 1, 2015, May 10, 2016 and May 5, 2017, filed as Exhibit 10.4 to the Registrant’s Second Amendment to the
Registration Statement on Form S-1 filed on May 8, 2017 (File No. 333-217285), and incorporated herein by reference.

First Amendment to Employment Agreement, by and between the Registrant and Rajesh K. Malik, M.D., dated July 1, 2014, as amended
on May 5, 2017, filed as Exhibit 10.5 to the Registrant’s Second Amendment to the Registration Statement on Form S-1 filed on May 8,
2017 (File No. 333-217285), and incorporated herein by reference.

67

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.6*

10.7*

10.8*

10.9*

10.10

10.11**

10.12**

10.13*

10.14*

10.15*

10.16*

10.17*

10.18*

21.1

23.1

31.1

31.2

32.1

First Amendment to Employment Agreement, by and between the Registrant and Gregory J. Mossinghoff, dated February 1, 2015, as
amended on May 5, 2017, filed as Exhibit 10.6 to the Registrant’s Second Amendment to the Registration Statement on Form S-1 filed on
May 8, 2017 (File No. 333-217285), and incorporated herein by reference.

Consulting Agreement, by and between the Registrant and Gregory J. Mossinghoff, dated June 3, 2014, filed as Exhibit 10.7 to the
Registrant’s Registration Statement on Form S-1 filed on April 13, 2017 (File No. 333-217285), and incorporated herein by reference.

Director Agreement, by and between the Registrant and Seth A. Rudnick, M.D., dated July 15, 2016, filed as Exhibit 10.8 to the
Registrant’s Registration Statement on Form S-1 filed on April 13, 2017 (File No. 333-217285), and incorporated herein by reference.

Advisory Board Members Agreement, by and between the Registrant and Seth A. Rudnick, M.D., dated July 15, 2016, filed as Exhibit
10.9 to the Registrant’s Registration Statement on Form S-1 filed on April 13, 2017 (File No. 333-217285), and incorporated herein by
reference.

Second Amendment to Office Lease, by and between the Registrant and Highwoods Realty Limited Partnership as assigned to Raleigh RC
Green, LLC, dated January 10, 2014, filed as Exhibit 10.10 to the Registrant’s Registration Statement on Form S-1 filed on April 13, 2017
(File No. 333-217285), and incorporated herein by reference.

Exclusive License Agreement, dated November 23, 2016, by and between the Registrant and The Board of Trustees of the University of
Illinois, filed as Exhibit 10.11 to the Registrant’s Registration Statement on Form S-1 filed on April 13, 2017 (File No. 333-217285), and
incorporated herein by reference.

Amendment No. 1 to Exclusive License Agreement, dated March 24, 2017, by and between the Registrant and The Board of Trustees of
the University of Illinois, filed as Exhibit 10.12 to the Registrant’s Registration Statement on Form S-1 filed on April 13, 2017 (File No.
333-217285), and incorporated herein by reference.

Non-Employee Director Compensation Policy, filed as Exhibit 10.13 to the Registrant’s Second Amendment to the Registration Statement
on Form S-1 filed on May 8, 2017 (File No. 333-217285), and incorporated herein by reference.

First Amendment to Employment Agreement, by and between the Registrant and Jennifer K. Moses, dated May 10, 2016, as amended on
May 5, 2017, filed as Exhibit 10.14 to the Registrant’s Second Amendment to the Registration Statement on Form S-1 filed on May 8,
2017 (File No. 333-217285), and incorporated herein by reference.

First Amendment to Employment Agreement, by and between the Registrant and Jay C. Strum, Ph.D., dated July 1, 2014, as amended
May 5, 2017, filed as Exhibit 10.15 to the Registrant’s Second Amendment to the Registration Statement on Form S-1 filed on May 8,
2017 (File No. 333-217285), and incorporated herein by reference.

Employment Agreement by and between the Registrant and Terry Murdock, dated as of August 1, 2017, filed as Exhibit 10.1 to the
Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2017 filed on November 8, 2017 (File No. 001-38096),
and incorporated herein by reference.

Employment Agreement by and between the Registrant and Barclay A. Phillips, dated as of November 13, 2017, filed as Exhibit 10.1 to
the Registrant’s Current Report on Form 8-K filed on November 13, 2017 (File No. 001-38096), and incorporated herein by reference.

  Non-Qualified Stock Option Agreement by and between the Registrant and Barclay A. Phillips, dated December 6, 2017.

Subsidiaries of the Registrant, filed as Exhibit 21.1 to the Registrant’s Registration Statement on Form S-1 filed on April 13, 2017 (File
No. 333-217285), and incorporated herein by reference.

  Consent of PricewaterhouseCoopers LLP.

  Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as

Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

  Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as

Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

  Certification of Principal Executive Officer Pursuant to 18 U.S.C. § 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act

of 2002.

68

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
32.2

  Certification of Principal Financial Officer Pursuant to 18 U.S.C. § 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act

of 2002.

101.INS

  XBRL Instance Document

101.SCH

  XBRL Taxonomy Extension Schema Document

101.CAL

  XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF

  XBRL Taxonomy Extension Definition Linkbase Document

101.LAB

  XBRL Taxonomy Extension Label Linkbase Document

101.PRE

  XBRL Taxonomy Extension Presentation Linkbase Document

*
**

Management contract or compensatory plan or arrangement.
Confidential treatment has been requested for portions of this exhibit.  These portions have been omitted and have been filed separately with the U.S.
Securities and Exchange Commission.

Item 16. Form 10-K Summary.

None.

69

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

Date:  February 21, 2018

  G1 THERAPEUTICS, INC.

  By:

/s/ Mark A. Velleca
Mark A. Velleca, M.D., Ph.D.
President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below by the following persons on behalf of the
Registrant in the capacities and on the dates indicated.

Name

Title

/s/ Mark A. Velleca
Mark A. Velleca, M.D., Ph.D.

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

Date

  February 21, 2018

/s/ Barclay A. Phillips
Barclay A. Phillips

/s/ Jennifer K. Moses
Jennifer K. Moses

/s/ Fredric N. Eshelman
Fredric N. Eshelman, Pharm.D.

/s/ Glenn P. Muir
Glenn P. Muir

/s/ Tyrell J. Rivers
Tyrell J. Rivers, Ph.D.

/s/ Seth A. Rudnick
Seth A. Rudnick, M.D.

/s/ Christy L. Shaffer
Christy L. Shaffer, Ph.D.

/s/ Andrew P. Witty
Sir Andrew P. Witty

Chief Financial Officer and Senior Vice President of Corporate
Development

  February 21, 2018

  (Principal Financial Officer)

  Vice President of Finance and Administration
  (Principal Accounting Officer)

  Director

  Director

  Director

  Director

  Director

  Director

70

  February 21, 2018

  February 21, 2018

  February 21, 2018

  February 21, 2018

  February 21, 2018

  February 21, 2018

  February 21, 2018

 
 
 
   
 
 
   
 
   
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of G1 Therapeutics, Inc.:

Opinion on the Financial Statements

We have audited the accompanying balance sheets of G1 Therapeutics, Inc. as of December 31, 2017 and December 31, 2016, and the related statements of
operations, of redeemable convertible preferred stock and stockholders’ equity (deficit) and of cash flows for each of the three years in the period ended
December 31, 2017, including the related notes (collectively referred to as the “financial statements”).  In our opinion, the financial statements present fairly,
in all material respects, the financial position of the Company as of December 31, 2017 and 2016, and the results of its operations and its cash flows for each
of the three years in the period ended December 31, 2017 in conformity with accounting principles generally accepted in the United States of America.  

Basis for Opinion

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

We conducted our audits of these financial statements 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.

/s/ PricewaterhouseCoopers LLP
Raleigh, North Carolina
February 21, 2018

We have served as the Company's auditor since 2014.

F-1

 
 
 
 
 
 
 
 
 
 
 
 
G1 Therapeutics, Inc.
Balance Sheets
(in thousands, except share and per share amounts)

Assets
Current assets

Cash and cash equivalents
Prepaid expenses and other current assets

Total current assets

Property and equipment, net
Total assets

Liabilities, Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit)
Current liabilities

Accounts payable
Accrued expenses
Warrant liability

Total current liabilities

Other non-current liabilities
Total liabilities

Commitments and contingencies
Series C redeemable convertible preferred stock $0.0001 par value, 0 shares authorized,
   issued and outstanding on December 31, 2017, 17,000,000 shares authorized,
   5,609,398 issued and outstanding on December 31, 2016; (liquidation preference of $51,673 on
   December 31, 2016)
Series B redeemable convertible preferred stock $0.0001 par value, 0 shares authorized,
   issued and outstanding on December 31, 2017, 23,000,000 shares authorized,
   7,642,734 issued and outstanding on December 31, 2016; (liquidation preference of $35,722 on
   December 31, 2016)
Series A redeemable convertible preferred stock $0.0001 par value, 0 shares authorized,
   issued and outstanding on December 31, 2017, 14,996,692 shares authorized,
   4,998,895 issued and outstanding on December 31, 2016; (liquidation preference of $14,431 on
   December 31, 2016)
Series 1 redeemable convertible preferred stock $0.0001 par value, 0 shares authorized,
   issued and outstanding on December 31, 2017, 2,112,025 shares authorized,
   682,026 issued and outstanding on December 31, 2016; (liquidation preference of $931 on
   December 31, 2016)
Stockholders’ equity (deficit)

Common stock, $0.0001 par value, 120,000,000 shares and 73,000,000 shares authorized as of
    December 31, 2017 and December 31, 2016, respectively; 28,420,511 and 1,504,947 shares
    issued as of December 31, 2017 and December 31, 2016, respectively; 28,393,845 and
    1,478,281 shares outstanding as of December 31, 2017 and December 31, 2016, respectively
Treasury stock, 26,666 shares
Additional paid-in capital
Accumulated deficit

Total stockholders’ equity (deficit)
Total liabilities, mezzanine equity and equity

December 31, 2017

December 31, 2016

  $

  $

  $

103,812    $
849   
104,661   
510   
105,171    $

4,184    $
7,520   
—   
11,704   
79   
11,783   

47,305 
596 
47,901 
311 
48,212 

2,605 
2,853 
167 
5,625 
— 
5,625 

—   

51,424 

—   

40,355 

—   

14,431 

—   

1,370 

3   
(8)  
222,511   
(129,118)  
93,388   
105,171    $

— 
(8)
— 
(64,985)
(64,993)
48,212

  $

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

F-2

 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
    
 
  
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
    
 
  
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
G1 Therapeutics, Inc.
Statements of Operations
(in thousands, except share and per share amounts)

Grant revenue
Operating expenses

Research and development
General and administrative
Total operating expenses
Operating loss

Other income (expense)

Other income
Change in fair value in warrant liability and other liabilities
Change in fair value of Series B purchase option liability

Total other income (expense), net
Net loss

Accretion of redeemable convertible preferred stock
Net loss attributable to common stockholders

Net loss per share attributable to common stockholders, basic and diluted
Weighted average common shares outstanding, basic and diluted

2017

Year Ended December 31,
2016

2015

  $

—    $

—    $

522 

53,881   
7,087   
60,968   
(60,968)  

888   
(41)  
—   
847   
(60,121)   $

(4,757)  
(64,878)   $

(3.57)   $

25,161   
5,230   
30,391   
(30,391)  

182   
(82)  
—   
100   
(30,291)   $

(4,405)  
(34,696)   $

(23.33)   $

18,197,970   

1,486,986   

12,730 
3,216 
15,946 
(15,424)

18 
(85)
(4,772)
(4,839)
(20,263)

(1,427)
(21,690)

(16.13)
1,344,584

  $

  $

  $

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

F-3

 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
G1 Therapeutics, Inc.
Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit)
(in thousands, except share amounts)

Preferred stock
series C

Preferred stock
series B

Preferred stock
series A

Preferred stock
series 1

Common stock

    Treasury stock

Shares

    Amount    

Shares

    Amount    

Shares

    Amount     Shares

    Amount      

Shares

    Amount    Shares     Amount   

Additional

paid-in     Accumulated   
capital

deficit

Total
share-
holders'  
equity  

—    $

—     

—    $

—      4,998,895    $ 13,171      682,026    $

931        1,273,831    $ —      (26,666)   $

(8)   $

3    $

(10,623)   $ (10,628)

—     

—      7,642,734      33,262     

—     

—     

—     

—       

—      —     

—      —     

—     

—     

— 

—     

—     

—     

(1,935)    

—     

—     

—     

—       

—      —     

—      —     

—     

—     

— 

—     

—     

—     

797     

—     

630     

—     

—       

—      —     

—      —     

(626)    

(800)    

(1,426)

—     

—     

—     

—     

—     

—     

—     

—       

164,722      —     

—      —     

53     

—     

53  

—     

—     

—     

—     

—     

—     

—     

—       

—      —     

—      —     

—     

— 

—     

—     

—     

—     

—     

—     

—     

—       

—      —     

—      —     

389     

—     

389  

—     

—     

—     

(139)    

—     

—     

—     

—       

—      —     

—      —     

—     

—     

— 

—     

—     

—     

—     

—     

—     

—     

—       

48,666      —     

—      —     

181     

—     

181  

—     

—     

—     

6,707     

—     

—     

—     

—       

—      —     

—      —     

—     

—     

— 

—     

—     

—     

—     

—     

—     

—     

—       

—      —     

—      —     

—     

(20,263)    

(20,263)

— 

$

— 

  7,642,734    $ 38,692 

  4,998,895 

$ 13,801 

  682,026    $

931 

  1,487,219 

$ — 

  (26,666)

$

(8)

$

— 

$

(31,686)

$ (31,694)

    5,609,398      50,000      

—     

—     

—     

—     

—     

—       

—      —     

—      —     

—     

—     

— 

—     

1,673      

—     

1,663     

—     

630     

—     

439       

—      —     

—      —     

(1,397)    

(3,008)    

(4,405)

—     

—     

—     

—     

—     

—     

—     

—       

17,728      —     

—      —     

6     

—     

6  

—     

—     

—     

—     

—     

—     

—     

—       

—      —     

—      —     

1,391     

—     

1,391  

—     

(249)    

—     

—     

—     

—     

—     

—       

—      —     

—      —     

—     

—     

— 

—     

—     

—     

—     

—     

—     

—     

—       

—      —     

—      —     

—     

(30,291)    

(30,291)

    5,609,398   

  7,642,734 

    4,998,895   

    682,026 

    1,504,947   

    (26,666)  

$ 51,424  

  $ 40,355 

$ 14,431 

  $ 1,370 

$ — 

$

(8)

$

— 

$

(64,985)

$ (64,993)

—     

3,732      

—     

620     

—     

235     

—     

171       

—      —     

—      —     

(745)    

(4,012)    

(4,757)

—     

—     

—     

—     

—     

—     

—     

—        7,781,564     

1     

—      —      108,502     

—      108,503  

  (5,609,398)     (55,156)     (7,642,734)     (40,975)     (4,998,895)     (14,666)     (682,026)     (1,541)       18,933,053     

2     

—      —      112,335     

—      112,337 

—     

—     

—     

—     

—     

—     

—     

—       

—      —     

—      —     

208     

—     

208  

—     

—     

—     

—     

—     

—     

—     

—       

160,579      —     

—      —     

214     

—     

214  

—     

—     

—     

—     

—     

—     

—     

—       

40,368      —     

—      —   

1     

—     

1  

—     
—     

—     
—     

—     
—     

—     
—     

—     
—     

—     
—     

—     
—     

—       
—       

—      —     
—      —     

—      —     
—      —     

3,394     
(1,398)    

—     
—     

3,394  
(1,398)

Balance at
December
31, 2014
Issuance of
Series B
redeemable
convertible
preferred
   stock
Allocation of
Series B
proceeds to
Series B
purchase
   option
liability
Accretion of
redeemable,
convertible
preferred
stock
Exercise of
common
stock options
Exercise of
common
stock
warrants
Stock-based
compensation
Stock
financing
costs
Issuance of
common
shares for
license
agreement
Exercise of
Series B
purchase
option
liability
Net loss
during year
Balance at
December
31, 2015
Issuance of
Series C
redeemable
convertible
preferred
   stock
Accretion of
redeemable,
convertible
preferred
stock
Exercise of
common
stock options
Stock-based
compensation
Stock
financing
costs
Net loss
during year
Balance at
December
31, 2016
Accretion of
redeemable,
convertible
preferred
stock
Initial public
offering
Automatic
conversion of
preferred
stock
Automatic
conversion of
preferred
warrants
Exercise of
common
stock options
Exercise of
common
stock
warrants
Stock-based
compensation
IPO
financing

 
 
 
   
   
   
     
   
 
 
   
   
 
 
   
 
 
 
 
 
 
 
 
 
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
costs
Net loss
during
quarter
Balance at
December
31, 2017

—     

—     

—     

—     

—     

—     

—     

—       

—      —     

—      —     

—     

(60,121)    

(60,121)

— 

$

— 

—    $

— 

— 

$

— 

—    $ — 

  28,420,511 

$

3 

  (26,666)

$

(8)

$ 222,511 

$

(129,118)

$ 93,388  

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

F-4

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
G1 Therapeutics, Inc.
Statements of Cash Flows
(amounts in thousands)

Cash flows from operating activities
Net loss
Adjustments to reconcile net loss to net cash used in operating activities

Depreciation and amortization
Stock-based compensation
Purchase of license agreement
Gain/loss on disposal of property and equipment
Increase in fair value of warrant activity
Increase in fair value of Series B purchase option liability
Change in operating assets and liabilities
Prepaid expenses and other assets
Accounts payable and accrued expenses
Net cash used in operating activities

Cash flows from investing activities
Purchases of property and equipment

Net cash used in investing activities

Cash flows from financing activities
Proceeds from stock options and warrants exercised
Proceeds from Series C preferred stock
Proceeds from Series B preferred stock
Issuance costs for preferred share financings
Proceeds from initial public offering, net of underwriting fees and commissions
Payment of public offering costs

Net cash provided by financing activities
Net change in cash and cash equivalents

Cash and cash equivalents
Beginning of period
End of period

Non-cash investing and financing activities
Accretion of redeemable convertible preferred stock
Exercise of Series B purchase option
Common stock issued for patent rights
Conversion of preferred stock and preferred warrants to common stock and common
warrants

2017

Year Ended December 31,
2016

2015

  $

(60,121)   $

(30,291)   $

(20,263)

89   
3,394   
—   
6   
41   
—   

(253)  
6,325   
(50,519)  

(294)  
(294)  

215   
—   
—   
—   
108,503   
(1,398)  
107,320   
56,507   

67   
1,391   
—   
18   
82   
—   

216   
3,376   
(25,141)  

(250)  
(250)  

7   
50,000   
—   
(249)  
—   
—   
49,758   
24,367   

  $

  $
  $
  $

  $

47,305   
103,812    $

22,938   
47,305    $

4,757    $
—    $
—    $

4,405    $
—    $
—    $

112,545    $

—    $

42 
389 
181 
2 
85 
4,773 

(789)
1,735 
(13,845)

(87)
(87)

53 
— 
33,263 
(140)
— 
— 
33,176 
19,244 

3,694 
22,938 

1,427 
6,708 
181 

—

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

F-5

 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
    
 
  
 
 
 
 
 
 
    
 
    
 
  
 
 
 
 
G1 Therapeutics, Inc.
Notes to Financial Statements

1. Description of business

G1 Therapeutics, Inc. (the “Company”) is a privately held clinical-stage biopharmaceutical company based in Research Triangle Park, North Carolina that
focuses on the discovery and development of novel therapeutics for the treatment of cancer. The Company was incorporated on May 19, 2008 in the state of
Delaware.

The Company focuses on cyclin-dependent kinases (CDKs), a family of proteins that plays an important role in the growth and proliferation of all human
cells.  The  Company  has  focused  its  CDK  research  on  developing  potent  and  selective  inhibitors  of  the  kinases  CDK4  and  CDK6,  collectively  known  as
CDK4/6. The Company is currently advancing two CDK4/6 inhibitor product candidates that each have broad applicability across multiple cancer indications.

Trilaciclib,  the  Company’s  most  advanced  clinical-stage  candidate,  is  a  potential  first-in-class  intravenous  CDK4/6  inhibitor  designed  to  preserve
hematopoietic stem cells and enhance immune system function during chemotherapy. Based on compelling response rates and favorable tolerability shown in
early-stage  trials,  trilaciclib  is  currently  being  evaluated  in  four  randomized  Phase  1b/2a  trials:  two  in  patients  with  small  cell  lung  cancer,  or  SCLC,  an
additional Phase 2 trial in combination with Tecentriq in SCLC and a Phase 2 in patients with triple-negative breast cancer, or TNBC.

G1T38,  the  Company’s  second  clinical-stage  candidate,  is  a  potential  best-in-class  oral  CDK4/6  inhibitor,  to  be  used  in  combination  with  other  targeted
therapies to treat multiple cancers. A Phase 1 trial of G1T38 in 75 healthy volunteers showed a favorable safety profile, and the Company initiated a Phase
1/2 trial in ER+, HER2- breast cancer in January 2017. The Company’s plans for G1T38 include future combinations in other cancers, such as non-small cell
lung cancer, or NSCLC.

As part of the Company’s strategy to develop wholly-owned proprietary combinations, the Company has exclusively in-licensed G1T48, a potential first/best-
in-class oral selective estrogen receptor degrader, or SERD. The Company expects to initially develop G1T48 to be used in combination with G1T38 for the
treatment of ER+, HER2- breast cancer.

The  Company  plans  to  continue  to  leverage  its  proprietary  assets  and  knowledge  of  CDK4/6  biology  to  explore  additional  combination  treatments  and  to
build a fully integrated oncology company.

The Company’s financial statements have been prepared assuming that the Company will continue as a going concern, which contemplates the realization of
assets and the settlement of liabilities and commitments in the normal course of business. As of December 31, 2017, the Company had an accumulated deficit
of $129.1 million. The Company has reported a net loss in all fiscal periods since inception and expects to incur substantial losses in the future to conduct
research and development and pre-commercialization activities.

As of December 31, 2017, the Company had cash and cash equivalents of $103.8 million.   The Company expects that its existing cash and cash equivalents
will enable it to fund its operating expenses and capital expenditure requirements for greater than 12 months from the date of filing this Annual Report.  The
failure  of  the  Company  to  obtain  sufficient  funds  on  acceptable  terms  when  needed  could  have  a  material  adverse  effect  on  the  Company’s  results  of
operations and financial condition.  

2. Summary of significant accounting policies

Basis of presentation

The  Company  has  prepared  the  accompanying  financial  statements  in  conformity  with  generally  accepted  accounting  principles  in  the  United  States  of
America (“U.S. GAAP”).

Use of estimates

The  preparation  of  financial  statements  in  conformity  with  U.S.  GAAP  requires  management  to  make  estimates  and  assumptions  that  affect  the  amounts
reported in the financial statements and the accompanying notes. Actual results could differ from those estimates. These estimates include the Company’s
common stock valuation, warrant valuation and deferred tax asset valuation allowance.

F-6

 
Cash and cash equivalents

The  Company  considers  all  highly  liquid  investments  purchased  with  an  original  maturity  of  three  months  or  less  at  the  date  of  purchase  to  be  cash
equivalents. Cash and cash equivalents at December 31, 2017 consist of amounts on deposit in banks, including checking accounts, money market accounts
and certificates of deposit. Cash deposits are all in financial institutions in the United States.

Concentration of credit risk

Financial instruments that potentially subject the Company to credit risk consist of cash and cash equivalents. Deposits with financial institutions are insured,
up to certain limits, by the Federal Deposit Insurance Corporation (“FDIC”). The Company’s cash deposits often exceed the FDIC insurance limit; however,
all deposits are maintained with high credit quality institutions and the Company has not experienced any losses in such accounts. The financial condition of
financial institutions is periodically reassessed, and the Company believes the risk of any loss is minimal. The Company believes the risk of any loss on cash
due to credit risk is minimal.

Property and equipment

Property  and  equipment  are  stated  at  cost  less  accumulated  depreciation.  Depreciation  is  generally  calculated  using  the  straight-line  method  over  the
following estimated useful lives:

Computer equipment
Laboratory equipment
Furniture and fixtures
Leasehold improvements

    5 years
    5 years
    7 years
    7 years

Costs associated with maintenance and repairs are charged to expense as incurred. Property and equipment held under leasehold improvements are amortized
over the shorter of the lease term or the estimated useful life of the related asset.

Impairment of long-lived assets

The Company evaluates its long-lived assets for indicators of possible impairment by comparison of the carrying amounts to future net undiscounted cash
flows expected to be generated by such assets when events or changes in circumstances indicate the carrying amount of an asset may not be recoverable.
Should  an  impairment  exist,  the  impairment  loss  would  be  measured  based  on  the  excess  carrying  value  of  the  asset  over  the  asset’s  fair  value  based  on
discounted estimates of future cash flows. For the years ended  December 31, 2017, 2016 and 2015, the Company’s management evaluated its long-lived
assets and determined no impairment charge was needed.

Warrant liability

Warrants to purchase the Company’s redeemable convertible preferred stock have been classified as liabilities and are recorded at their estimated fair value. In
each reporting period, any change in fair value of the warrants has been recorded as expense in the case of an increase in fair value and income in the case of
a decrease in fair value.

Series B purchase option liability

The option to purchase shares of Series B redeemable convertible preferred stock in the second tranche has been accounted for as a free-standing instrument
and classified as a liability. On February 4, 2015, upon purchase of the first tranche of Series B Preferred Stock, the option to purchase additional shares was
recorded at its fair value, with the remaining cash proceeds received on that date allocated to Series B Preferred Stock. As the value of the option to purchase
shares in the second tranche increased over time, a change in the fair value of the liability was recorded as “Change in fair value of Series B purchase option
liability” in the accompanying statement of operations. This free-standing instrument was exercised on December 10, 2015 when the holders exercised their
right to require the purchase of the second tranche shares by the holders of the outstanding shares of Series B Preferred Stock, resulting in an outstanding
liability of $0 on December 31, 2016 and 2017.

Research and development

Research and development expenses consist of costs incurred to further the Company’s research and development activities and include salaries and related
employee  benefits,  manufacturing  of  pharmaceutical  active  ingredients  and  drug  products,  costs  associated  with  clinical  trials,  nonclinical  activities,
regulatory activities, research-related overhead expenses and fees paid to expert consultants,

F-7

 
 
 
 
 
 
 
external service providers and contract research organizations which conduct certain research and development activities on behalf of the Company. Costs
incurred in the research and development of products are charged to research and development expense as incurred.

Each  reporting  period,  the  Company  estimates  and  accrues  expenses,  the  largest  of  which  is  related  to  accrued  research  and  development  expenses.  This
process involves reviewing contracts and purchase orders, identifying services that have been performed on the Company’s behalf, and estimating the level of
service performed and the associated cost incurred for the service when the Company has not yet been invoiced or otherwise notified of the actual costs.

Costs for preclinical studies and clinical trial activities are recognized based on an evaluation of vendors’ progress towards completion of specific tasks, using
data such as patient enrollment, clinical site activations or information provided by vendors regarding their actual costs incurred. Payments for these activities
are  based  on  the  terms  of  individual  contracts  and  payment  timing  may  differ  significantly  from  the  period  in  which  the  services  were  performed.  The
Company determines accrual estimates through reports from and discussions with applicable personnel and outside service providers as to the progress or
state  of  completion  of  trials,  or  the  services  completed.  The  estimates  of  accrued  expenses  as  of  each  balance  sheet  date  are  based  on  the  facts  and
circumstances known at the time.

Revenue recognition

The Company received the majority of its revenues from grant programs authorized by Congress through the Small Business Innovation Research (SBIR)
program and the Small Business Technology Transfer Act (STTR) of 1992. In addition, the Company was also awarded grant funds through other federal and
state  programs  related  to  its  research.  Under  the  terms  of  the  grants,  the  Company  is  entitled  to  receive  reimbursement  of  its  allowable  direct  expenses,
allocated overhead and general and administrative expenses.

Revenue  received  under  these  grant  programs  is  recognized  as  direct  project  costs  are  incurred,  plus  a  portion  of  the  Company’s  indirect  costs  such  as
overhead and general and administrative expenses allocated to the project. The Company’s grant agreements are fixed fee arrangements.

In the event that the granting agency provides advance funding of a grant award, the Company records deferred revenues and then recognizes revenue as costs
are incurred over the life of the grant.

To date, the Company has not generated any revenue from the commercial sale of its product candidates.

Fair value of financial instruments

The Company provides disclosure of financial assets and financial liabilities that are carried at fair value based on the price that would be received upon sale
of  an  asset  or  paid  to  transfer  a  liability  in  an  orderly  transaction  between  market  participants  at  the  measurement  date.  Fair  value  measurements  may  be
classified based on the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities using the following three levels:

Level 1

Level 2

Inputs  are  unadjusted  quoted  prices  in  active  markets  for  identical  assets  or  liabilities  that  the  Company  has  the  ability  to  access  at  the
measurement date.

Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets
that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or
corroborated by observable market data by correlation or other means.

Level 3

Unobservable inputs that reflect the Company’s estimates of the assumptions that market participants would use in pricing the asset or liability.
The Company develops these inputs based on the best information available, including its own data.

The carrying amounts of cash, cash equivalents, accounts payable and accrued liabilities approximate fair value because of their short-term nature.

F-8

 
 
  
 
 
  
 
 
  
At  December 31, 2017 and 2016 these financials instruments and respective fair values have been classified as follows (in thousands):

Assets

Money market funds
Certificates of Deposit
Total assets at fair value:

Liabilities:

Warrant Liability

Total liabilities at fair value:

Assets

Money market funds
Certificates of Deposit
Total assets at fair value:

Liabilities:

Warrant Liability

Total liabilities at fair value:

Quoted prices
in active
markets for
identical
assets
(Level 1)

Significant
other
observable
inputs
(Level 2)

Significant
other
unobservable
inputs
(Level 3)

Balance at
December 31,
2017

  $

  $

  $
  $

87,694     $
15,203      
102,897     $

—     $
—     $

—     $
—      
—     $

—    $
—    $

—     $
—      
—     $

— 
— 

 $
 $

87,694 
15,203 
102,897 

— 
—

Quoted prices
in active
markets for
identical
assets
(Level 1)

Significant
other
observable
inputs
(Level 2)

Significant
other
unobservable
inputs
(Level 3)

Balance at
December 31,
2016

  $

  $

  $
  $

31,730     $
15,041      
46,771     $

—     $
—     $

—     $
—      
—     $

—     $
—     $

—     $
—      
—     $

167     $
167     $

31,730 
15,041 
46,771 

167 
167

The change in the fair value measurement using significant inputs (Level 3) is summarized below (in thousands):

Balance at December 31, 2015
Change in fair value in warrant liability
Balance at December 31, 2016
Change in fair value in warrant liability
Conversion of warrant to common stock warrant
Balance at December 31, 2017

  $

  $

  $

85 
82 
167 
41 
(208)
—

Patent costs

Costs associated with the submission of patent applications are expensed as incurred given the uncertainty of the future economic benefits of the patents.
Patent-related legal expenses included in general and administrative costs were approximately $997, $1,034, and $691 for the years ended December 31,
2017, 2016 and 2015, respectively.  

Income taxes

Income  taxes  are  accounted  for  using  the  asset  and  liability  method.  Deferred  tax  assets  and  liabilities  are  recognized  for  the  future  tax  consequences
attributable to temporary differences between the financial statements carrying amounts of assets and liabilities and their respective tax bases, operating loss
carryforwards, and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the
years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is
recognized in income in the period that includes the enactment date.

In  accordance  with  Financial  Accounting  Standards  Board  (FASB)  Accounting  Standards  Codification  (ASC)  740,  Accounting  for  Income  Taxes,  the
Company reflects in the financial statements the benefit of positions taken in a previously filed tax return or expected to be taken in a future tax return only
when it is considered ‘more-likely-than-not’ that the position taken will be sustained by a taxing authority. As of December 31, 2017 and 2016, the Company
had no unrecognized income tax benefits and correspondingly

F-9

 
 
 
 
 
 
 
 
 
 
 
     
       
       
       
 
   
   
       
       
       
  
 
 
 
 
 
 
 
 
 
 
 
     
       
       
       
 
   
   
       
       
       
  
 
 
 
 
 
 
 
 
 
 
 
there is no impact on the Company’s effective income tax rate associated with these items. The Company’s policy for recording interest and penalties relating
to uncertain income tax positions is to record them as a component of income tax expense in the accompanying statements of operations. As of December 31,
2017 and 2016, the Company had no such accruals.

Stock-based compensation

The  primary  type  of  stock-based  payments  utilized  by  the  Company  are  stock  options.  The  Company  accounts  for  stock-based  employee  compensation
arrangements by measuring the cost of employee services received in exchange for all equity awards granted based on the fair value of the award on the grant
date. The fair value of each employee stock option is estimated on the date of grant using an options pricing model. The Company currently uses the Black-
Scholes valuation model to estimate the fair value of its share-based payments. The model requires management to make a number of assumptions including
expected volatility, expected life, risk-free interest rate and expected dividends.

The Company accounts for stock-based non-employee compensation arrangements by recording the expense of such services based on the fair value of the
equity instrument as estimated using the Black-Scholes pricing model. The fair value of the equity instrument is charged to operating expense over the term of
the service agreement.

Segment information

The Company manages its operations as a single segment for the purposes of assessing performance and making operating decisions. All of the Company’s
assets are held in the United States.

Comprehensive loss

Comprehensive loss includes net loss as well as other changes in stockholders’ equity (deficit) that result from transactions and economic events other than
those with stockholders. There was no difference between net loss and comprehensive loss for each of the periods presented in the accompanying financial
statements.

Redeemable convertible preferred stock

The Company classifies its redeemable convertible preferred stock, for which the Company does not control the redemption, outside of permanent equity. The
Company  records  redeemable  convertible  preferred  stock  at  fair  value  upon  issuance,  net  of  any  offering  costs,  and  the  carrying  value  is  adjusted  to  the
redemption  value  at  the  end  of  each  reporting  period.  These  adjustments  are  effected  through  charges  against  additional  paid-in  capital  and  accumulated
deficit.

New accounting standards

In  May  2017,  the  FASB  issued  ASU  2017-09,  Compensation—Stock  Compensation  (Topic  718):  Scope  of  Modification  Accounting.  This  guidance  is
intended  to  provide  clarity  and  reduce  diversity  in  practice  as  to  when  changes  to  the  terms  or  conditions  of  share-based  payments  are  accounted  for  as
modifications. Under this new guidance, entities will apply modification accounting if the fair value, vesting conditions or classification of the award changes.
This  guidance  will  be  effective  for  annual  reporting  periods  beginning  after  December  15,  2017,  including  interim  periods  within  those  annual  reporting
periods, and early adoption is permitted. The guidance per ASU 2017-09 is to be adopted prospectively to an award modified on or after the adoption date.
The Company does not anticipate a material impact to the Company’s financial statements as a result of the adoption of this guidance.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The
FASB issued ASU 2016-09 to improve U.S. GAAP by providing guidance on the cash flow statement classification of eight specific areas where there is
existing diversity in practice. The FASB expects that the guidance in this ASU will reduce the current and potential future diversity in practice in such areas.
This ASU is effective for annual and interim periods beginning after December 15, 2017, with early adoption permitted. The Company is currently evaluating
the impact of the adoption of this ASU on the Company’s financial statements.

In  February  2016,  the  FASB  issued  ASU  No.  2016-02,  Leases  (Topic  842).  This  guidance  revises  the  accounting  related  to  leases  by  requiring  lessees  to
recognize a lease liability and a right-of-use asset for all leases. The new lease guidance also simplifies the accounting for sale and leaseback transactions.
This ASU is effective for annual reporting periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently evaluating
the impact of the adoption of this ASU on the Company’s financial statements.

F-10

 
In May 2014, the FASB and the International Accounting Standards Board jointly issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic
606),  which  supersedes  the  revenue  recognition  requirements  in  ASC  605  and  most  industry-specific  guidance.  The  new  standard  requires  that  an  entity
recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects
to be entitled in exchange for those goods and services. The update also requires additional disclosures about the nature, amount, timing and uncertainty of
revenue  and  cash  flows  arising  from  customer  contracts,  including  significant  judgements  and  changes  in  judgments  and  assets  recognized  from  costs
incurred to obtain or fulfill a contract. ASU 2014-09 is effective for public entities for annual and interim periods within those annual periods beginning after
December 15, 2017. The Company is currently evaluating the method of adoption and the potential impact this standard may have on its financial position
and results of operations. The future impact of ASU 2014-09 will be dependent on the nature of the Company’s future revenue contracts and arrangements, if
any.

3. Property and equipment

Property and equipment consists of the following (in thousands):

Computer equipment
Laboratory equipment
Furniture and fixtures
Leasehold improvements
Construction in progress
Accumulated depreciation

Property and equipment, net

December 31,
2017

December 31,
2016

  $

  $

112    $
283     
174     
121     
1     
(181)    
510    $

67 
207 
64 
80 
— 
(107)
311

Depreciation expenses relating to property and equipment were $89, $67, and $42 for the years ended December 31, 2017, 2016 and 2015, respectively.

4. Patent license agreement

On November 23, 2016, the Company entered into a license agreement with the Board of Trustees of the University of Illinois (the University) whereby the
University  licensed  patent  rights  to  the  Company,  with  rights  of  sublicense,  to  make,  have  made,  use,  import,  sell  and  offer  for  sale  products  covered  by
certain  patent  rights  owned  by  the  University.  The  rights  licensed  to  the  Company  are  exclusive,  worldwide,  non-transferable  rights,  for  all  fields  of  use.
Under the terms of the agreement the Company paid a one-time only, non-refundable license issue fee in the amount of $500 which was charged to research
and development expense in the fourth quarter of 2016.

The  Company  is  also  obligated  to  pay  annual  maintenance  fees  to  the  University.  All  annual  minimum  payments  are  fully  creditable  against  any  royalty
payments made by the Company. Under the terms of the agreement, the Company must pay the University a low single-digit royalty percentage on all net
sales of products and a share of sublicensing revenues. The University is eligible to receive milestone payments of up to $2,625  related to the initiation and
execution  of  clinical  trials  and  first  commercial  sale  of  a  product  in  multiple  countries.  The  Company  is  also  responsible  for  all  future  patent  prosecution
costs.

The term of the license agreement will continue until the later of (i) the expiration of the last valid claim within the patent rights covering the product in such
country, (ii) the expiration of market exclusivity in such country and (iii) the 10th anniversary of the first commercial sale in such country. The University
may terminate the agreement in the event (i) the Company fails to pay any amount or make any report when required to be made and fails to cure such failure
within thirty (30) days after receipt of notice from the University, (ii) is in breach of any provision of the agreement and fails to remedy within forty-five
(45) days after receipt of notice, (iii) makes a report to the University under the agreement that is determine to be materially false, (iv) declares insolvency or
bankruptcy or (v) takes an action that causes patent rights or technical information to be subject to lien or encumbrance and fails to remedy any such breach
with  in  forty-five  (45)  days  of  receipt  of  notice  from  the  University.  The  Company  may  terminate  the  agreement  at  any  time  on  written  notice  to  the
University at least ninety (90) days prior to the termination date specified in the notice. Upon expiration or termination of the agreement, all rights revert to
the University.

On December 31, 2015 the Company entered into a non-exclusive, royalty-free license agreement for patent rights. As consideration for the patent rights, the
Company issued 48,666 shares of common stock with a fair value of $181, and agreed to pay past and future

F-11

 
 
 
 
   
 
 
 
 
 
   
 
  
   
   
   
   
   
 
 
patent  prosecution  costs  related  to  the  countries  in  which  valid  claims  have  or  will  have  issued.  The  aggregate  fair  value  of  all  consideration  paid  was
expensed as a research and development cost in 2015.

5. Accrued expenses

Accrued expenses are comprised as follows (in thousands):

Accrued external research and professional fees
Accrued external clinical study costs
Accrued compensation expense
Deferred rent, current portion

Accrued expenses

December 31,
2017

December 31,
2016

  $

  $

1,402    $
4,788     
1,328     
2     
7,520    $

295 
1,897 
617 
44 
2,853

6. Lease obligations

Operating lease commitments

Pursuant to a lease dated January 10, 2014, on April 1, 2014, the Company leased office and lab space under a lease agreement for $6 per month with a free
rent period and escalating rent payments; the lease was set to expire on July 31, 2017.

On January 27, 2016, the Company signed an amendment to the Company’s existing lease to move to a larger office and lab space beginning in August 2016
for $16 per month with a discounted rent period and escalating rent payments; the lease was extended to December 31, 2022. The amendment also contained
an option for a five year renewal and a right of first refusal to lease adjacent office space.

On March 27, 2017, the Company signed an amendment to the Company’s existing lease to lease additional, adjacent office space. Beginning August 2017,
the combined space leased for $24 per month with a discounted rent period and escalating rent payments. The lease is set to expire on December 31, 2022.
The Company has maintained an option for a five year renewal on the combined space.

Rent expense amounted to $252, $126 and $71 for the years ended December 31, 2017, 2016 and 2015, respectively.

The following is a schedule by years of minimum future rental payments on noncancelable operating leases as of December 31, 2017 (in thousands):

2018
2019
2020
2021
2022
2023

7. Capitalization

Redeemable convertible preferred stock

  $

  $

294 
303 
312 
321 
331 
— 
1,561

The Company has determined that the Series C, Series B, Series A and Series 1 redeemable convertible preferred stock were redeemable, after a stated period
of  time,  based  on  voting  thresholds  that  vary  by  shareholder  class,  as  outlined  in  the  Company’s  certificate  of  incorporation.  The  Company  classified  its
redeemable convertible preferred stock outside of permanent equity and into mezzanine equity.

The Company recorded its redeemable convertible preferred stock at fair value upon issuance, net of any issuance costs or discounts, and the carrying value is
increased  by  periodic  accretion  to  its  redemption  value  until  the  earliest  possible  date  of  redemption.  These  increases  were  recorded  as  charges  against
additional  paid-in-capital  until  the  additional  paid-in-capital  balance  is  reduced  to  zero.  At  that  time,  additional  accretion  adjustments  were  recorded  as
additions to accumulated deficit. 

F-12

 
 
 
 
   
 
 
 
 
 
   
 
  
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
In May 2014, the Company issued 2,495,663 shares of its Series A redeemable convertible preferred stock for cash consideration of $2.52 per share. Total
proceeds, including cancellation of indebtedness of $39, amounted to $6,289.

In  February  2015,  the  Company’s  Board  of  Directors  and  stockholders  approved  the  Fourth  Amended  and  Restated  Certification  of  Incorporation,  which
increased  the  authorized  number  of  shares  of  its  redeemable  convertible  preferred  stock  to  39,908,717,  of  which  2,112,025  were  designated  as  Series  1
redeemable convertible preferred stock, 14,996,692 as Series A redeemable convertible preferred stock and 22,800,000 as Series B redeemable convertible
preferred stock. At the same time, the Company issued 3,794,024 shares of its Series B redeemable convertible preferred stock for cash consideration and
cancellation of indebtedness at a price of $4.3521 per share. Total proceeds, including cancellation of indebtedness of $12, amounted to $16,512.

In December 2015, the Company approved a Certificate of Amendment to the Fourth Amended and Restated Certification of Incorporation which increased
the authorized number of shares of its redeemable convertible preferred stock to 40,108,717, of which 2,112,025 were be designated as Series 1 redeemable
convertible  preferred  stock,  14,996,692  as  Series  A  redeemable  convertible  preferred  stock  and  23,000,000  as  Series  B  redeemable  convertible  preferred
stock. At the same time, the Company authorized 11,546,147 shares of its Series B redeemable convertible preferred stock and issued 3,848,710 shares of its
Series B redeemable convertible preferred stock for cash consideration at a price of $4.3521 per share. Total additional proceeds amounted to $16,750.

In April 2016, the Company’s Board of Directors and stockholders approved the Fifth Amended and Restated Certification of Incorporation which increased
the authorized number of shares of its redeemable convertible preferred stock to 57,108,717, of which 2,112,025 were be designated as Series 1 redeemable
convertible preferred stock, 14,996,692 as Series A redeemable convertible preferred stock, 23,000,000 as Series B redeemable convertible preferred stock
and 17,000,000 as Series C redeemable convertible preferred stock. In the second quarter of 2016, the Company authorized 16,828,217 shares of its Series C
redeemable convertible preferred stock and issued 5,609,398 shares of its Series C redeemable convertible preferred stock for cash consideration at a price of
$8.91 per share. Total additional proceeds amounted to $50,000.

Prior  to  the  IPO,  the  holders  of  the  Company’s  convertible  preferred  stock  had  certain  voting  and  dividend  rights,  as  well  as  liquidation  preferences  and
conversion privileges.  All rights, preferences and privileges associated with the convertible preferred stock were terminated at the time of the Company’s IPO
in conjunction with the conversion of all outstanding shares of convertible preferred stock into shares of common stock.  

On May 22, 2017, the Company closed its IPO of 7,781,564 shares of the Company’s common stock at a public offering price of $15.00 per share, including
781,564 shares of common stock issued upon exercise by the underwriters of their option to purchase additional shares. The gross proceeds from the IPO
were $116.7 million and net proceeds were $107.1 million, after deducting underwriting discounts and commissions and other offering expenses payable by
the Company.

Upon closing of the IPO, all outstanding shares of the Company’s preferred stock were automatically converted into 18,933,053 shares of common stock. In
connection with the IPO, the Board of Directors and the stockholders of the Company approved a one-for-three reverse stock split of the Company’s common
stock. The reverse stock split became effective on May 11, 2017. All share and per share amounts in the financial statements have been retroactively adjusted
for all periods presented to give effect to the reverse stock split, including reclassifying an amount equal to the reduction in par value to accumulated deficit.

Series B preferred stock tranche rights

Pursuant to the terms of the Series B Preferred Stock Purchase Agreement, the purchasers of Series B redeemable convertible preferred stock at the initial
closing also committed to purchase an aggregate of 3,791,272 shares of Series B redeemable convertible preferred stock at $4.3521 per share (the “Second
Tranche Shares”) at a second closing, subject to certain conditions, upon the achievement of one of the following milestones: (i) the Company’s enrollment of
ten  patients  in  an  IV  trilaciclib  SCLC  chemoprotection  clinical  trial  with  resulting  data  trending  positively  against  historical  controls  or  (ii)  successful
completion of IND-enabling studies for an oral trilaciclib antineoplastic program; provided, that either milestone is achieved prior to the earliest to occur of
(i) a qualified initial public offering, (ii) a liquidation event or (iii) 12 months after the initial closing. Holders of at least sixty percent (60%) of the then-
outstanding shares of Series B redeemable convertible preferred stock may elect to waive the foregoing conditions and to require the purchasers of Series B
redeemable  convertible  preferred  stock  to  purchase  their  pro  rata  portion  of  the  Second  Tranche  Shares.  Each  purchaser  also  had  the  option,  but  not  the
obligation, to purchase all of its allocation of the Second Tranche Shares at any time prior to the earlier to occur of (i) the second closing, and (ii) 12 months
after the initial closing.

The option to purchase shares of Series B redeemable convertible preferred stock in the second tranche has been accounted for as a free-standing instrument
and classified as a liability. On February 4, 2015, upon purchase of the first tranche of Series B redeemable convertible preferred stock, the option to purchase
additional shares was recorded at its fair value, with the remaining cash proceeds received on that date allocated to Series B redeemable convertible preferred
stock.  As  the  value  of  the  option  to  purchase  shares  in  the  second  tranche  increased  over  time,  a  change  in  the  fair  value  of  the  liability  was  recorded  as
“Change in fair value of Series B purchase option liability” in the accompanying statement of operations. This free-standing instrument was exercised on
December 10,

F-13

 
2015 when the holders of at least sixty percent (60%) of the then-outstanding shares of Series B redeemable convertible preferred stock elected to waive the
conditions set forth above and required the purchasers of Series B redeemable convertible preferred stock to purchase their pro rata portion of the second
tranche shares resulting in an outstanding liability of $0 on December 31, 2016. The Company relied on an independent third-party valuation in estimating the
fair value of its Series B purchase option liability. The valuations used significant assumptions including the estimated volatility range of 68%-71%, risk free
interest  rate  range  of  0.47%-0.94%,  estimated  fair  value  of  the  redeemable  convertible  preferred  stock  and  a  2-year  estimated  life  of  the  purchase  option.
These  assumptions  were  used  in  the  option  pricing  method  and  the  probability  weighted  expected  return  method,  a  blend  of  which  were  considered  in
establishing fair value.

Preferred stock

Upon completion of the IPO, all outstanding preferred stock was automatically converted into 18,933,053 shares of common stock.  The Company is also
authorized to issue 5.0 million shares of undesignated preferred stock in one or more series.  As December 31, 2017, no shares of preferred stock were issued
or outstanding.

Common stock

The Company’s common stock has a par value of $0.0001 per share and consists of 120,000,000 and 73,000,000 authorized shares as of December 31, 2017
and 2016, respectively.  Holders of common stock are entitled to one vote per share and are entitled to receive dividends, as if and when declared by the
Company’s Board of Directors.

The Company has reserved authorized shares of common stock for future issuance at December 31, 2017 and December 31, 2016 as follows:

Conversion of Series C Preferred Stock on a fully-diluted basis
Conversion of Series B Preferred Stock on a fully-diluted basis
Conversion of Series A Preferred Stock on a fully-diluted basis
Conversion of Series 1 Preferred Stock on a fully-diluted basis
Common stock warrants issued with promissory notes
Other common stock warrants
Series 1 Preferred Stock warrants issued with promissory notes
Common stock options outstanding
Options available for grant under Equity Incentive Plans

December 31,
2017

December 31,
2016

—      
—      
—      
—      
—      
—      
—      
4,116,333      
1,602,687      
5,719,020      

5,609,398  
7,642,734  
4,998,895  
682,026  
16,666  
3,466  
21,978  
3,690,058  
176,919  
22,842,140

8. Stock option plan

2011 Equity Incentive Plan

In  March  2011,  the  Company  adopted  the  2011  Equity  Incentive  Plan  (the  “Plan”).   As  amended,  4,400,640  shares  of  common  stock  were  reserved  for
issuance under the 2011 Plan.  Eligible plan participants included employees, directors, officers, consultants and advisors of the Company. The 2011 plan
permitted the granting of incentive stock options, nonqualified stock options and other stock- based awards. In connection with the adoption of the 2017 Plan
(as defined below), the 2011 Plan was terminated and no further awards will be made under the 2011 Plan.

2017 Equity Incentive Plan

In May 2017, the Company adopted the 2017 Equity Incentive Plan (the “2017 Plan”). The 2017 Plan provided for the direct award or sale of the Company’s
common stock and for the grant of up to 1,932,000 stock options to employees, directors, officers, consultants and advisors of the Company.  The 2017 Plan
provides for the grant of incentive stock options, non-statutory stock options or restricted stock.

F-14

 
 
   
   
 
 
   
   
   
   
   
   
   
   
   
   
   
   
   
     
 
 
      
 
Under both the 2011 Plan and the 2017 Plan, options to purchase the Company’s common stock may be granted at a price no less than the fair market value of
a share of common stock on the date of grant.  The fair value shall be the closing sales price for a share as quoted on any established securities exchange for
such  grant  date  or  the  last  preceding  date  for  which  such  quotation  exists.    Vesting  terms  of  options  issued  are  determined  by  the  board  of  directors  or
compensation committee of the board.  The Company’s stock options vest based on terms in the stock option agreements.  Stock options have a maximum
term of ten years.

As of December 31, 2017, there were a total of 1,602,687 shares of common stock available for future issuance under the 2017 Plan.

Stock-based Compensation

During the years ended December 31, 2017, 2016 and 2015, the Company recorded employee share-based compensation expense of $1,772, $907, and $180,
respectively. The Company recorded non-employee share-based compensation expense of $1,622, $484, and $209 during the years ended December 31, 2017,
2016 and 2015, respectively.  Total share-based compensation expense included in the statements of operations is as follows:

Research and development
General and administrative

Total stock-based compensation expense

2017

Year Ended December 31,
2016
in thousands

2015

  $

  $

2,531  
863  
3,394  

  $

  $

911  
480  
1,391  

  $

  $

221  
168  
389  

The  fair  value  of  each  option  grant  is  estimated  on  the  grant  date  using  the  Black-Scholes  option-pricing  model,  using  the  following  weighted  average
assumptions:

Expected volatility
Weighted-average risk-free rate
Dividend yield
Expected term (in years)
Weighted-average grant-date fair value per share

2017

74.2 - 79.3%
1.9 - 2.2%
—%
6.01
10.71

  $

Year Ended December 31,
2016

74.8 - 83.9%
1.2 - 2.1%
—%
6.40
3.24

    $

    $

2015

66.8 - 69.3%
1.5 - 1.7%
—%
6.56
1.59

The expected term of stock options represents the weighted-average period the stock options are expected to remain outstanding and is based on the option
vesting term, contractual terms and industry peers as the Company did not have sufficient historical information to develop reasonable expectations about
future exercise patterns and post-vesting employment termination behavior.

The expected stock price volatility assumptions for the Company’s stock options were determined by examining the historical volatilities for industry peers.

The risk-free interest rate assumption at the date of grant is based on the U.S. Treasury instruments whose term was consistent with the expected term of the
Company’s stock options.

F-15

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
   
   
 
 
   
   
 
 
     
   
 
 
 
The expected dividend assumption is based on the Company’s history and expectation of dividend payouts.

Stock option activity during 2017 is as follows:

Weighted average

Options
outstanding

Weighted
average
exercise
price

Remaining
contractual
for
life (Years)

Balance as of December 31, 2016

Cancelled
Granted
Exercised
Balance as of December 31, 2017

Exercisable at December 31, 2017
Vested at December 31, 2017 and expected to vest

3,690,058    $

(89,687)   $
688,997     
(173,035)    
4,116,333    $

2,225,970     
4,116,333     

2.13     

3.81     
15.96     
2.24     
4.41     

1.64     
4.41     

Aggregate
intrinsic
value
(in thousands)  
17,463 

8.4    $

7.8    $

7.2    $
7.8    $

63,577 

40,523 
63,577

As  of  December  31,  2017,  there  was  $10,404  of  total  unrecognized  share-based  compensation  costs,  net  of  estimated  forfeitures,  which  is  expected  to  be
recognized over a weighted-average period of 2.93 years.   

In 2016, in connection with preparation of the 2015 financials, the Company reassessed the determination of the fair value of the common shares underlying
stock options granted throughout 2015. As a result, the Company determined that the fair value of the common shares was $0.75, $2.40 and $2.73 per share at
February 27, 2015, July 15, 2015 and September 7, 2015, respectively, which was higher than the fair value as initially determined by the Board of Directors
on the dates of grant. The use of this higher share price increased both recognized and unrecognized share-based compensation expense and also impacted the
valuation of the non-employee share-based compensation expense which is marked to market at each reporting date.

In 2017, in connection with the Company’s initial public offering and after discussions with their underwriters, the Company reassessed the determination of
the fair value of the common shares underlying the 1,099,320 stock options granted throughout 2016, and the 119,997 options granted up through the IPO
date of May 16, 2017, and determined that no adjustment was necessary.

Since the IPO, the board of directors has determined the fair value of each common share underlying share-based awards based on the closing price of the
common shares as reported by Nasdaq on the date of grant.

9. Net loss per common share

Basic  net  loss  per  common  share  is  computed  using  the  weighted  average  number  of  common  shares  outstanding  during  the  period  including  nominal
issuances  of  common  stock  warrants.  Diluted  net  loss  per  common  share  is  computed  using  the  sum  of  the  weighted  average  number  of  common  shares
outstanding during the period and, if dilutive, the weighted average number of potential shares of common stock, including the assumed exercise of stock
options, stock warrants and unvested restricted common stock. For the years ended December 31, 2017, 2016 and 2015, the following potentially dilutive
securities have been excluded from the computations of diluted weighted-average shares outstanding because the effect would be anti-dilutive:

Stock options issued and outstanding
Stock warrants

Amounts in the table above reflect the common stock equivalents of the noted instruments.

F-16

2017

Year Ended December 31,
2016

2015

3,838,358   
11,385   
3,849,743   

3,224,682   
25,444   
3,250,126   

1,867,325 
25,444 
1,892,769

 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
   
   
 
   
 
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
   
 
 
 
 
 
   
 
 
   
 
 
   
   
   
      
  
   
      
  
   
      
  
   
   
   
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10. Income taxes

Income  taxes  are  accounted  for  using  the  asset  and  liability  method.  Deferred  tax  assets  and  liabilities  are  recognized  for  the  future  tax  consequences
attributable to temporary differences between the financial statements carrying amounts of assets and liabilities and their respective tax bases, operating loss
carryforwards, and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the
years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is
recognized in income in the period that includes the enactment date.

In  accordance  with  FASB  ASC  740,  Accounting  for  Income  Taxes,  the  Company  reflects  in  the  financial  statements  the  benefit  of  positions  taken  in  a
previously  filed  tax  return  or  expected  to  be  taken  in  a  future  tax  return  only  when  it  is  considered  ‘more-likely-than-not’  that  the  position  taken  will  be
sustained by a taxing authority. As of December 31, 2017 and 2016, the Company had no unrecognized income tax benefits and correspondingly there is no
impact  on  the  Company’s  effective  income  tax  rate  associated  with  these  items.  The  Company’s  policy  for  recording  interest  and  penalties  relating  to
uncertain income tax positions is to record them as a component of income tax expense in the accompanying statements of operations. As of December 31,
2017 and 2016, the Company had no such accruals.

The components of income tax expense (benefit) attributable to continuing operations are as follows:

Current Expense:

Federal
State

Deferred Expense:

Federal
State

Year ended December 31,
2016

2017

2015

  $

  $

—     $
—      
—      

—      
—      
—     $

—     $
—      
—      

—      
—      
—     $

— 
— 
— 

— 
— 
—

The differences between the company’s income tax expense attributable to continuing operation and the expense computed at the 34% U.S. statutory income
tax rate were as follows (in thousands):

Federal income tax expense at statutory rate:
Increase (reduction) in income tax resulting from:

Year ended December 31,
2016
(10,299)   $

2017
(20,441)   $

  $

2015

(6,890)

State Income Taxes
Increase in Valuation Allowance
Increase in fair value of Series B purchase option liability    
Equity Financing Expenses
Stock Compensation
Research and Development Credit
Effect on Tax Cuts & Job Acts Rate Reduction
Other

  $

F-17

(1,623)    
8,977     
—     
39     
152     
(1,882)    
14,770     
8     
—    $

(397)    
10,936     
—     
371     
200     
(803)    
—     
(8)    
—    $

(335)
6,109 
1,623 
— 
48 
(509)
— 
(46)
—

 
 
 
 
 
 
 
 
 
 
   
   
 
     
       
       
 
   
 
   
   
       
       
  
   
   
 
 
 
 
 
 
 
 
 
   
 
 
 
   
      
      
  
   
   
   
   
   
   
   
 
 
The  tax  effects  of  temporary  differences  and  operating  loss  carryforwards  that  gave  rise  to  significant  portions  of  the  deferred  tax  assets  and  deferred  tax
liabilities were as follows at December 31, 2017 and 2016 (in thousands):

Deferred tax assets

Accrued expenses
Deferred rent
Stock compensation
Charitable contributions
Capitalized patents and licenses
R&D credits
Net operating loss carryforwards

Deferred tax assets

Deferred tax liabilities

Property, plant and equipment, primarily
   due to differences in depreciation

Deferred tax liabilities
Valuation allowance
Net deferred tax assets

Year ended December 31,
2016
2017

  $

1,412    $
20   
360   
2   
1,225   
3,333   
23,556   
29,908   

(21)  
(21)  
(29,887)  

  $

—    $

751 
16 
386 
1 
1,474 
1,451 
16,844 
20,923 

(13)
(13)
(20,910)
—

At December 31, 2017 and December 31, 2016, the Company evaluated all significant available positive and negative evidence, including the existence of
losses  in  recent  years  and  management’s  forecast  of  future  taxable  income,  and,  as  a  result,  determined  it  was  more  likely  than  not  that  federal  and  state
deferred tax assets, including benefits related to net operating loss carryforwards, would not be realized. The valuation allowance was increased from $20,910
at  December  31,  2016  to  $29,887  at  December  31,  2017.  The  increase  in  valuation  allowance  was  due  primarily  to  the  increase  in  net  operating  loss
carryforwards and income tax credits offset by the impact of the Tax Cuts and Job Act rate reduction.

The table below summarizes changes in the deferred tax valuation allowance (in thousands):

Balance at beginning of year
Charges to costs and expenses
Write-offs
Balance at end of year

  $

2017

2016

2015

20,910    $
8,977   
—   
29,887   

9,974    $
10,936   
—   
20,910   

3,865 
6,109 
— 
9,974

At December 31, 2017, the Company has federal net operating loss carryforwards of approximately $100,795, which are available to offset future taxable
income. The federal net operating loss carryforwards begin to expire in 2028. In addition, the Company has state net operating loss carryforwards totaling
approximately $100,793, which are available to offset future state taxable income. State net operating losses begin to expire in 2023. Because the Company
has incurred cumulative net operating losses since inception, all tax years remain open to examination by U.S. federal and state income tax authorities.

In  accordance  with  FASB  ASC  740,  Accounting  for  Income  Taxes,  the  Company  reflects  in  the  financial  statements  the  benefit  of  positions  taken  in  a
previously  filed  tax  return  or  expected  to  be  taken  in  a  future  tax  return  only  when  it  is  considered  ‘more-likely-than-not’  that  the  position  taken  will  be
sustained by a taxing authority. As of December 31, 2017 and 2016, the Company had no unrecognized income tax benefits and correspondingly there is no
impact  on  the  Company’s  effective  income  tax  rate  associated  with  these  items.  The  Company’s  policy  for  recording  interest  and  penalties  relating  to
uncertain income tax positions is to record them as a component of income tax expense in the accompanying statements of income. As of December 31, 2017
and 2016, the Company had no such accruals.

On December 22, 2017, the Tax Cuts and Jobs Act (“Tax Act”) was signed into law. The Tax Act lowered the Federal corporate tax rate from 34% to 21%
and made numerous other tax law changes. The Company has measured deferred tax assets at the enacted tax rate expected to apply when these temporary
differences are expected to be realized or settled, resulting in a provisional charge of $14.8 million for the revaluation of the Company’s deferred tax assets. 
U.S.  GAAP  requires  companies  to  recognize  the  effect  of  tax  law  changes  in  the  period  of  enactment.    Reasonable  estimates  were  made  based  on  the
Company’s analysis of the Tax Act. These provisional amounts may be adjusted during 2018 when additional information is obtained. Additional information
that may affect

F-18

 
 
 
 
 
 
 
 
   
 
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
our  provisional  amounts  would  include  further  clarification  and  guidance  on  how  the  Internal  Revenue  Service  will  implement  the  Tax  Act,  including
guidance  with  respect  to  guidance  on  how  state  taxing  authorities  will  implement  tax  reform  and  the  related  effect  on  our  state  income  tax  returns,
completion of our 2017 tax return filings, and the potential for additional guidance from the Financial Accounting Standards Board related to the Tax Act.
Under the Tax Act, NOLs arising after December 31, 2017 may be carried forward indefinitely. However, for NOLs arising after December 31, 2017, NOL
carryforwards will be limited to 80% of taxable income. The Company’s NOLs generated in 2017 and in prior years will not be subject to the limitations
under the Tax Act.

Potential 382 Limitation

The Company’s ability to utilize its net operating loss (NOL) and research and development (R&D) credit carryforwards may be substantially limited due to
ownership changes that may have occurred or that could occur in the future, as required by Section 382 of the Internal Revenue Code of 1986, as amended
(the Code), as well as similar state provisions. These ownership changes may limit the amount of NOL and R&D credit carryforwards that can be utilized
annually  to  offset  future  taxable  income  and  tax,  respectively.  In  general,  an  “ownership  change,”  as  defined  by  Section  382  of  the  Code,  results  from  a
transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percent of the outstanding stock of a company
by certain stockholders or public groups.

The  Company  has  not  completed  a  study  to  assess  whether  one  or  more  ownership  changes  have  occurred  since  the  Company  became  a  loss  corporation
under the definition of Section 382. If the Company has experienced an ownership change, utilization of the NOL or R&D credit carryforwards would be
subject  to  an  annual  limitation,  which  is  determined  by  first  multiplying  the  value  of  the  Company’s  stock  at  the  time  of  the  ownership  change  by  the
applicable long-term, tax-exempt rate, and then could be subject to additional adjustments, as required. Any such limitation may result in the expiration of a
portion of the NOL or R&D credit carryforwards before utilization. Until a study is completed and any limitation known, no amounts are being considered as
an uncertain tax position or disclosed as an unrecognized tax benefit under ASC-740. Any carryforwards that expire prior to utilization as a result of such
limitations  will  be  removed  from  deferred  tax  assets  with  a  corresponding  reduction  of  the  valuation  allowance.  Due  to  the  existence  of  the  valuation
allowance, it is not expected that any possible limitation will have an impact on the results of operations of the Company.

11. Related party transactions

Two co-founders and shareholders of the Company had consulting agreements with the Company for their continued development work through June 30,
2017. The Company renewed its consulting agreement with one of these founders through June 30, 2019. Combined consulting fees paid to both founders
were approximately $64, $108, and $104 for the years ended December 31, 2017, 2016 and 2015, respectively.

The Company paid approximately $11, $14, $20 to the Chairman of the Board of Directors for scientific advisory services outside of his role on the board of
directors during the years ended December 31, 2017, 2016 and 2015, respectively.

12. Quarterly Results of Operations (Unaudited)

The  following  table  contains  quarterly  financial  information  for  2017  and  2016.  The  Company  believes  that  the  following  information  reflects  all  normal
recurring adjustments necessary for a fair statement of the information for the periods presented. The operating results for any quarter are not necessarily
indicative of results for any future period.

F-19

 
 
 
 
Total operating expenses
Operating loss
Total other income (expense), net
Net loss

Accretion of redeemable convertible preferred stock
Net loss attributable to common stockholders
Net loss per share attributable to common stockholders, basic and diluted

Weighted average common shares outstanding, basic and diluted

Total operating expenses
Operating loss
Total other income (expense), net
Net loss and comprehensive loss

Accretion of redeemable convertible preferred stock
Net loss attributable to common stockholders
Net loss per share attributable to common stockholders, basic and diluted

Three Months Ended

(unaudited)

(in thousands, except share and per share amounts)

March 31,

2017

June 30,

2017

September 30,

  December 31,

2017

2017

12,378    $
(12,378)  
33   
(12,345)   $

(4,468)  
(16,813)   $
(11.24)   $

15,379    $
(15,379)  
185   
(15,194)   $

(289)  
(15,483)   $
(1.09)   $

15,929    $
(15,929)  
328   
(15,601)   $

—   
(15,601)   $
(0.55)   $

17,282 
(17,282)
301 
(16,981)

— 
(16,981)
(0.60)

1,496,336   

14,208,115   

28,318,656   

28,362,323 

March 31,

2016

June 30,

2016

September 30,

  December 31,

2016

2016

5,946    $
(5,946)  
(8)  
(5,954)   $

(1,009)  
(6,963)   $
(4.71)   $

7,429    $
(7,429)  
50   
(7,379)   $

(986)  
(8,365)   $
(5.63)   $

6,613    $
(6,613)  
56   
(6,557)   $

(1,205)  
(7,762)   $
(5.21)   $

10,403 
(10,403)
2 
(10,401)

(1,205)
(11,606)
(7.77)

$

$

$
$

$

$

$
$

Weighted average common shares outstanding, basic and diluted

1,447,219   

1,486,303   

1,490,552   

1,493,753

13. Subsequent events

In January 2018, the Company signed an amendment to its current lease to secure additional 6,395 square feet of office space in its existing building. The
Company expects the space to be available in July 2018.

F-20

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
 
 
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.18

Option No.________

G1 THERAPEUTICS, INC.

Non-Qualified Stock Option Grant Notice

1.

2.

3.

4.

5.

6.

7.

Name and Address of Participant:Barclay A. Phillips

Date of Option Grant:December 6, 2017

Maximum Number of Shares for
which this Option is exercisable:

150,000

Exercise (purchase) price per share:

$19.46

Option Expiration Date:November 13, 2027

Vesting Start Date:November 13, 2017

Vesting Schedule:  This Option shall become exercisable (and the Shares issued upon exercise shall be vested) as follows
provided the Participant is an Employee of the Company or of an Affiliate on the applicable vesting date:

The option vests as to 25% of the option shares on November 13, 2018 and vests as to an additional 1/48th of the option
shares monthly thereafter.

The foregoing rights are cumulative and are subject to the other terms and conditions of this Agreement.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company and the Participant acknowledge receipt of this Stock Option Grant Notice and agree to the terms of the

Stock Option Agreement attached hereto and the terms of this Option Grant as set forth above.

G1 THERAPEUTICS, INC.

By:
     Name:
     Title:

Participant: Barclay A. Phillips

2

 
 
 
 
 
 
 
G1 THERAPEUTICS, INC.

NON-QUALIFIED STOCK OPTION AGREEMENT

Exhibit 10.18

AGREEMENT made as of the date of grant set forth in the Stock Option Grant Notice by and between G1 Therapeutics,
Inc.  (the  “Company”),  a  Delaware  corporation,  and  the  individual  whose  name  appears  on  the  Stock  Option  Grant  Notice  (the
“Participant”).

WHEREAS, the Company desires to grant to the Participant an Option to purchase shares of its common stock, $0.0001
par value per share (the “Shares”) as an inducement material to the Participant’s entering into employment as Senior Vice President
and Chief Financial Officer of the Company, effective November 13, 2017 (the “Vesting Start Date”), in accordance with the terms
of an employment agreement with the Company effective as of November 13, 2017; and

WHEREAS, the Company and the Participant each intend that the Option granted herein shall be a non-qualified stock

option.

NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  hereinafter  set  forth  and  for  other  good  and  valuable

consideration, the parties hereto agree as follows:

1.

DEFINITIONS.

Unless otherwise specified or unless the context otherwise requires, the following terms, as used in this Agreement, have

the following meanings:

Administrator  means  the  Board  of  Directors,  unless  it  has  delegated  power  to  act  on  its  behalf  to  the
Committee, in which case the term “Administrator” means the Committee.

Affiliate means a corporation which, for purposes of Section 424 of the Code, is a parent or subsidiary of the
Company, direct or indirect.

Board of Directors means the Board of Directors of the Company.

Cause means, with respect to the Participant (a) dishonesty with respect to the Company or any Affiliate, (b)
insubordination,  substantial  malfeasance  or  non‑feasance  of  duty,  (c)  unauthorized  disclosure  of  confidential
information,  (d)  breach  by  the  Participant  of  any  provision  of  any  employment,  consulting,  advisory,
nondisclosure,  non-competition  or  similar  agreement  between  the  Participant  and  the  Company  or  any
Affiliate, and (e) conduct substantially prejudicial to the business of the Company or any Affiliate; provided,
however, that any provision in an agreement between the Participant and the Company or an Affiliate, which
contains a conflicting definition of Cause for termination and which is in effect at the time of such termination,
shall  supersede  this  definition.   The  determination  of  the  Administrator  as  to  the  existence  of  Cause  will  be
conclusive on the Participant and the Company.

 
 
 
 
 
 
 
 
 
 
Code  means  the  United  States  Internal  Revenue  Code  of  1986,  as  amended  including  any  successor  statute,
regulation and guidance thereto.

Committee  means  the  committee  of  the  Board  of  Directors,  if  any,  to  which  the  Board  of  Directors  has
delegated power to act.

Common Stock means shares of the Company’s common stock, $0.0001 par value per share.

Disability or Disabled means permanent and total disability as defined in Section 22(e)(3) of the Code.

Employee means any employee of the Company or of an Affiliate (including, without limitation, an employee
who is also serving as an officer or director of the Company or of an Affiliate).

Exchange Act means the United States Securities Exchange Act of 1934, as amended.

Fair Market Value of a Share of Common Stock means:

(a)

If  the  Common  Stock  is  listed  on  a  national  securities  exchange  or  traded  in  the
over‑the‑counter  market  and  sales  prices  are  regularly  reported  for  the  Common  Stock,  the  closing  or,  if  not
applicable, the last price of the Common Stock on the composite tape or other comparable reporting system for
the trading day on the applicable date and if such applicable date is not a trading day, the last market trading
day prior to such date;

(b)

If  the  Common  Stock  is  not  traded  on  a  national  securities  exchange  but  is  traded  on  the
over‑the‑counter market, if sales prices are not regularly reported for the Common Stock for the trading day
referred to in clause (1), and if bid and asked prices for the Common Stock are regularly reported, the mean
between  the  bid  and  the  asked  price  for  the  Common  Stock  at  the  close  of  trading  in  the  over-the-counter
market for the trading day on which Common Stock was traded on the applicable date and if such applicable
date is not a trading day, the last market trading day prior to such date; and

(c)

If  the  Common  Stock  is  neither  listed  on  a  national  securities  exchange  nor  traded  in  the
over‑the‑counter  market,  such  value  as  the  Administrator,  in  good  faith,  shall  determine  in  compliance  with
applicable laws.

Non‑Qualified  Option  means  an  option  which  is  not  intended  to  qualify  as  an  incentive  stock  option  under
Section 422 of the Code.

Option means a Non‑Qualified Option granted as an inducement under Nasdaq Listing Rule 5635(c)(4).

Securities Act means the United States Securities Act of 1933, as amended.

2

 
 
Survivor means the deceased Participant’s legal representatives and/or any person or persons who acquire the
Option by will or by the laws of descent and distribution.

2.

GRANT OF OPTION.

The Company hereby grants to the Participant the right and option to purchase all or any part of an aggregate of
the  number  of  Shares  set  forth  in  the  Stock  Option  Grant  Notice,  on  the  terms  and  conditions  and  subject  to  all  the
limitations set forth herein and under United States securities and tax laws.

3.

EXERCISE PRICE.

The exercise price of the Shares covered by the Option shall be the amount per Share set forth in the Stock Option Grant
Notice, subject to adjustment, as provided in Section 10 of this Agreement, in the event of a stock split, reverse stock split or other
events  affecting  the  holders  of  Shares  after  the  date  hereof  (the  “Exercise  Price”).    Payment  shall  be  made  in  accordance  with
Section 6 of this Agreement.

4.

EXERCISABILITY OF OPTION.

Subject  to  the  terms  and  conditions  set  forth  in  this  Agreement,  the  Option  granted  hereby  shall  become  vested  and

exercisable as set forth in the Stock Option Grant Notice and is subject to the other terms and conditions of this Agreement.

5.

TERM OF OPTION.

This Option shall terminate on the Option Expiration Date as specified in the Stock Option Grant Notice, but shall be

subject to earlier termination as provided herein.

If  the  Participant  ceases  to  be  an  Employee  of  the  Company  or  of  an  Affiliate  for  any  reason  other  than  the  death  or
Disability of the Participant, or termination of the Participant for Cause (the “Termination Date”), the Option, to the extent then
vested and exercisable pursuant to Section 4 hereof as of the Termination Date and not previously terminated in accordance with
this Agreement, may be exercised within three months after the Termination Date, or on or prior to the Option Expiration Date as
specified in the Stock Option Grant Notice, whichever is earlier, but may not be exercised thereafter except as set forth below.  In
such event, the unvested portion of the Option shall not be exercisable and shall expire and be cancelled on the Termination Date.

Notwithstanding  the  foregoing,  in  the  event  of  the  Participant’s  Disability  or  death  within  three  months  after  the
Termination Date, the Participant or the Participant’s Survivors may exercise the Option within one year after the Termination Date,
but in no event after the Option Expiration Date as specified in the Stock Option Grant Notice.

3

 
 
 
 
 
 
 
 
 
 
 
 
 
In the event the Participant’s service is terminated by the Company or an Affiliate for Cause, the Participant’s right to
exercise any unexercised portion of this Option even if vested shall cease immediately as of the time the Participant is notified his
or her service is terminated for Cause, and this Option shall thereupon terminate.  Notwithstanding anything herein to the contrary,
if subsequent to the Participant’s termination, but prior to the exercise of the Option, the Administrator determines that, either prior
or  subsequent  to  the  Participant’s  termination,  the  Participant  engaged  in  conduct  which  would  constitute  Cause,  then  the
Participant shall immediately cease to have any right to exercise the Option and this Option shall thereupon terminate.

In  the  event  of  the  Disability  of  the  Participant,  the  Option  shall  be  exercisable  within  one  year  after  the  Participant’s
termination  of  service  due  to  Disability  or,  if  earlier,  on  or  prior  to  the  Option  Expiration  Date  as  specified  in  the  Stock  Option
Grant Notice.  In such event, the Option shall be exercisable:

(a)

(b)

to the extent that the Option has become exercisable but has not been exercised as of the date of the
Participant’s termination of service due to Disability; and

in  the  event  rights  to  exercise  the  Option  accrue  periodically,  to  the  extent  of  a  pro  rata  portion
through the date of the Participant’s termination of service due to Disability of any additional vesting
rights that would have accrued on the next vesting date had the Participant not become Disabled.  The
proration shall be based upon the number of days accrued in the current vesting period prior to the
date of the Participant’s termination of service due to Disability.

In the event of the death of the Participant while an Employee of the Company or of an Affiliate, the Option shall be
exercisable by the Participant’s Survivors within one year after the date of death of the Participant or, if earlier, on or prior to the
Option Expiration Date as specified in the Stock Option Grant Notice.  In such event, the Option shall be exercisable:

(x)

(y)

to  the  extent  that  the  Option  has  become  exercisable  but  has  not  been  exercised  as  of  the  date  of
death; and

in  the  event  rights  to  exercise  the  Option  accrue  periodically,  to  the  extent  of  a  pro  rata  portion
through the date of death of any additional vesting rights that would have accrued on the next vesting
date had the Participant not died.  The proration shall be based upon the number of days accrued in
the current vesting period prior to the Participant’s date of death.

6.

METHOD OF EXERCISING OPTION.

Subject to the terms and conditions of this Agreement, the Option may be exercised by written notice to the Company or
its designee, in substantially the form of Exhibit A attached hereto (or in such other form acceptable to the Company, which may
include electronic

4

 
 
 
 
 
 
 
 
 
 
 
 
 
 
notice).  Such notice shall state the number of Shares with respect to which the Option is being exercised and shall be signed by the
person exercising the Option (which signature may be provided electronically in a form acceptable to the Company).  Payment of
the Exercise Price for such Shares shall be made (a)  in  United  States  dollars  in  cash  or  by  check;  or  (b)  at  the  discretion  of  the
Administrator, through delivery of shares of Common Stock held for at least six months (if required to avoid negative accounting
treatment) having a Fair Market Value equal as of the date of the exercise to the aggregate cash exercise price for the number of
Shares as to which the Option is being exercised; or (c) at the discretion of the Administrator, by having the Company retain from
the Shares otherwise issuable upon exercise of the Option, a number of Shares having a Fair Market Value equal as of the date of
exercise to the aggregate exercise price for the number of Shares as to which the Option is being exercised; or (d) at the discretion
of the Administrator, in accordance with a cashless exercise program established with a securities brokerage firm, and approved by
the  Administrator;  or  (e)  at  the  discretion  of  the  Administrator,  by  any  combination  of  (a),  (b),  (c)  and  (d)  above;  or  (f)  at  the
discretion of the Administrator, by payment of such other lawful consideration as the Administrator may determine.  The Company
shall deliver such Shares as soon as practicable after the notice shall be received, provided, however, that the Company may delay
issuance of such Shares until completion of any action or obtaining of any consent, which the Company deems necessary under any
applicable law (including, without limitation, state securities or “blue sky” laws).  The Shares as to which the Option shall have
been so exercised shall be registered in the Company’s share register in the name of the person so exercising the Option (or, if the
Option  shall  be  exercised  by  the  Participant  and  if  the  Participant  shall  so  request  in  the  notice  exercising  the  Option,  shall  be
registered in the Company’s share register in the name of the Participant and another person jointly, with right of survivorship) and
shall be delivered as provided above to or upon the written order of the person exercising the Option.  In the event the Option shall
be  exercised,  pursuant  to  Section  5  hereof,  by  any  person  other  than  the  Participant,  such  notice  shall  be  accompanied  by
appropriate proof of the right of such person to exercise the Option.  All Shares that shall be purchased upon the exercise of the
Option as provided herein shall be fully paid and nonassessable.

7.

PARTIAL EXERCISE.

Exercise of this Option to the extent above stated may be made in part at any time and from time to time within the above

limits, except that no fractional share shall be issued pursuant to this Option.

8.

NON‑ASSIGNABILITY.

The Option shall not be transferable by the Participant otherwise than by will or by the laws of descent and distribution or
pursuant to a qualified domestic relations order as defined by the Code or Title I of the Employee Retirement Income Security Act
or  the  rules  thereunder.  Except  as  provided  above  in  this  paragraph,  the  Option  shall  be  exercisable,  during  the  Participant’s
lifetime,  only  by  the  Participant  (or,  in  the  event  of  legal  incapacity  or  incompetency,  by  the  Participant’s  guardian  or
representative) and shall not be assigned, pledged or hypothecated in any way (whether by operation of law or otherwise) and shall
not be subject to execution, attachment or similar process.  Any attempted transfer, assignment, pledge,

5

 
 
 
 
 
 
 
 
hypothecation or other disposition of the Option or of any rights granted hereunder contrary to the provisions of this Section 8, or
the levy of any attachment or similar process upon the Option shall be null and void.

9.

NO RIGHTS AS STOCKHOLDER UNTIL EXERCISE.

The Participant shall have no rights as a stockholder with respect to Shares subject to this Agreement until registration of
the Shares in the Company’s share register in the name of the Participant.  Except as is expressly provided in Section 10 of this
Agreement  with  respect  to  certain  changes  in  the  capitalization  of  the  Company,  no  adjustment  shall  be  made  for  dividends  or
similar rights for which the record date is prior to the date of such registration.

10.

ADJUSTMENTS.

Upon the occurrence of any of the following events, the Participant’s rights with respect to the Option shall be adjusted as

hereinafter provided:

(a) Stock Dividends and Stock Splits.  If (i) the Shares shall be subdivided or combined into a greater or smaller number
of  shares  or  if  the  Company  shall  issue  any  Shares  as  a  stock  dividend  on  its  outstanding  Common  Stock,  or
(ii)  additional  shares  or  new  or  different  shares  or  other  securities  of  the  Company  or  other  non-cash  assets  are
distributed  with  respect  to  such  shares  of  Common  Stock,  the  Option  and  the  number  of  Shares  deliverable
thereunder shall be appropriately increased or decreased proportionately, and appropriate adjustments shall be made
including, in the exercise price per share, to reflect such events.

(b) Corporate  Transactions.    If  the  Company  is  to  be  consolidated  with  or  acquired  by  another  entity  in  a  merger,
consolidation,  sale  of  all  or  substantially  all  of  the  Company’s  assets  or  the  acquisition  of  all  of  the  outstanding
voting stock of the Company in a single transaction or a series of related transactions by a single entity other than a
transaction to merely change the state of incorporation (a “Corporate Transaction”), the Administrator or the board
of directors of any entity assuming the obligations of the Company hereunder (the “Successor Board”), shall, as to
the unexercised portion of the Option, either (i) make appropriate provision for the continuation of the Option by
substituting  on  an  equitable  basis  for  the  Shares  then  subject  to  the  Option  either  the  consideration  payable  with
respect  to  the  outstanding  shares  of  Common  Stock  in  connection  with  the  Corporate  Transaction  or  securities  of
any  successor  or  acquiring  entity;  or  (ii)  upon  written  notice  to  the  Participant,  provide  that  the  Option  must  be
exercised (to the extent then exercisable, within a specified number of days of the date of such notice, at the end of
which period the Option shall terminate); or (iii) terminate the Option in exchange for payment of an amount equal
to  the  consideration  payable  upon  consummation  of  such  Corporate  Transaction  to  the  holder  of  the  number  of
shares  of  Common  Stock  into  which  such  Option  would  have  been  exercisable  (either  (A)  to  the  extent  then
exercisable or, (B) at the discretion of the Administrator, any such Options being made partially or fully exercisable
for  purposes  of  this  Subparagraph)  less  the  aggregate  exercise  price  thereof.    For  purposes  of  determining  the
payments to be made pursuant to subsection

6

 
 
 
 
 
 
 
 
 
 
 
(iii) above, in the case of a Corporate Transaction the consideration for which, in whole or in part, is other than cash,
the consideration other than cash shall be valued at the fair value thereof as determined in good faith by the Board of
Directors.

(c) Recapitalization or Reorganization.  In the event of a recapitalization or reorganization of the Company other than a
Corporate Transaction pursuant to which securities of the Company or of another corporation are issued with respect
to  the  outstanding  shares  of  Common  Stock,  a  Participant  upon  exercising  an  Option  or  accepting  a  Stock  Grant
after  the  recapitalization  or  reorganization  shall  be  entitled  to  receive  for  the  price  paid  upon  such  exercise  or
acceptance if any, the number of replacement securities which would have been received if such Option had been
exercised or Stock Grant accepted prior to such recapitalization or reorganization.

(d) Modification of Options.  Notwithstanding the foregoing, any adjustments made pursuant to Subparagraph (a), (b)
or  (c)  above  shall  be  made  only  after  the  Administrator  determines  whether  such  adjustments  would  cause  any
adverse tax consequences, including, but not limited to, pursuant to Section 409A of the Code.  If the Administrator
determines  that  such  adjustments  made  with  respect  to  Options  would  constitute  a  modification  of  the  Option  or
other  adverse  tax  consequence  to  the  Participant,  it  may  refrain  from  making  such  adjustments,  unless  the
Participant specifically agrees in writing that such adjustment be made and such writing indicates that the holder has
full knowledge of the consequences of such “modification” on his or her income tax treatment with respect to the
Option.

(e) Dissolution or Liquidation of the Company.  Upon the dissolution or liquidation of the Company, the Option will
terminate  and  become  null  and  void;  provided,  however,  that  if  the  rights  of  the  Participant  or  the  Participant’s
Survivors  have  not  otherwise  terminated  and  expired,  the  Participant  or  the  Participant’s  Survivors  will  have  the
right  immediately  prior  to  such  dissolution  or  liquidation  to  exercise  the  Option  to  the  extent  that  the  Option  is
exercisable as of the date immediately prior to such dissolution or liquidation.

11.

TAXES.

The Participant acknowledges and agrees that (i) any income or other taxes due from the Participant with respect to this
Option or the Shares issuable pursuant to this Option shall be the Participant’s responsibility; (ii) the Participant was free to use
professional  advisors  of  his  or  her  choice  in  connection  with  this  Agreement,  has  received  advice  from  his  or  her  professional
advisors in connection with this Agreement, understands its meaning and import, and is entering into this Agreement freely and
without coercion or duress; (iii) the Participant has not received and is not relying upon any advice, representations or assurances
made by or on behalf of the Company or any Affiliate or any employee of or counsel to the Company or any Affiliate regarding any
tax or other effects or implications of the Option, the Shares or other matters contemplated by this Agreement; and (iv) neither the
Administrator, the Company, its Affiliates, nor any of its officers or directors, shall be held liable for any applicable costs, taxes,

7

 
 
 
 
 
 
 
 
 
 
 
 
 
or  penalties  associated  with  the  Option  if,  in  fact,  the  Internal  Revenue  Service  were  to  determine  that  the  Option  constitutes
deferred compensation under Section 409A of the Code.

The  Participant  agrees  that  the  Company  may  withhold  from  the  Participant’s  remuneration,  if  any,  the  minimum
statutory  amount  of  federal,  state  and  local  withholding  taxes  attributable  to  such  amount  that  is  considered  compensation
includable in such person’s gross income.  At the Company’s discretion, the amount required to be withheld may be withheld in
cash from such remuneration, or in kind from the Shares otherwise deliverable to the Participant on exercise of the Option.  The
Participant  further  agrees  that,  if  the  Company  does  not  withhold  an  amount  from  the  Participant’s  remuneration  sufficient  to
satisfy the Company’s income tax withholding obligation, the Participant will reimburse the Company on demand, in cash, for the
amount under-withheld.

12.

PURCHASE FOR INVESTMENT.

Unless  the  offering  and  sale  of  the  Shares  to  be  issued  upon  the  particular  exercise  of  the  Option  shall  have  been
effectively  registered  under  the  Securities  Act,  the  Company  shall  be  under  no  obligation  to  issue  the  Shares  covered  by  such
exercise unless the Company has determined that such exercise and issuance would be exempt from the registration requirements
of the Securities Act and until the following conditions have been fulfilled:

(a)

(b)

The person(s) who exercise the Option shall warrant to the Company, at the time of such exercise,
that such person(s) are acquiring such Shares for their own respective accounts, for investment, and
not with a view to, or for sale in connection with, the distribution of any such Shares, in which event
the person(s) acquiring such Shares shall be bound by the provisions of the following legend which
shall be endorsed upon any certificate(s) evidencing the Shares issued pursuant to such exercise:

“The shares represented by this certificate have been taken for investment and they may not be sold
or  otherwise  transferred  by  any  person,  including  a  pledgee,  unless  (1)  either  (a)  a  Registration
Statement  with  respect  to  such  shares  shall  be  effective  under  the  Securities  Act  of  1933,  as
amended,  or  (b)  the  Company  shall  have  received  an  opinion  of  counsel  satisfactory  to  it  that  an
exemption  from  registration  under  such  Act  is  then  available,  and  (2)  there  shall  have  been
compliance with all applicable state securities laws;” and

If  the  Company  so  requires,  the  Company  shall  have  received  an  opinion  of  its  counsel  that  the
Shares  may  be  issued  upon  such  particular  exercise  in  compliance  with  the  Securities  Act  without
registration  thereunder.    Without  limiting  the  generality  of  the  foregoing,  the  Company  may  delay
issuance  of  the  Shares  until  completion  of  any  action  or  obtaining  of  any  consent,  which  the
Company deems necessary under any applicable law (including without limitation state securities or
“blue sky” laws).

8

 
 
 
 
 
 
 
 
 
 
 
 
13.

RESTRICTIONS ON TRANSFER OF SHARES.

13.1

The Participant agrees that in the event the Company proposes to offer for sale to the public any of its equity
securities and such Participant is requested by the Company and any underwriter engaged by the Company in connection with such
offering to sign an agreement restricting the sale or other transfer of Shares, then it will promptly sign such agreement and will not
transfer, whether in privately negotiated transactions or to the public in open market transactions or otherwise, any Shares or other
securities of the Company held by the Participant during such period as is determined by the Company and the underwriters, not to
exceed  180  days  following  the  closing  of  the  offering,  plus  such  additional  period  of  time  as  may  be  required  to  comply  with
FINRA  rules  or  similar  rules  thereto  promulgated  by  another  regulatory  authority  (such  period,  the  “Lock-Up  Period”).    Such
agreement shall be in writing and in form and substance reasonably satisfactory to the Company and such underwriter and pursuant
to  customary  and  prevailing  terms  and  conditions.    Notwithstanding  whether  the  Participant  has  signed  such  an  agreement,  the
Company  may  impose  stop-transfer  instructions  with  respect  to  the  Shares  or  other  securities  of  the  Company  subject  to  the
foregoing restrictions until the end of the Lock-Up Period.

13.2

The  Participant  acknowledges  and  agrees  that  neither  the  Company,  its  stockholders  nor  its  directors  and
officers, has any duty or obligation to disclose to the Participant any material information regarding the business of the Company or
affecting the value of the Shares before, at the time of, or following a termination of the service of the Participant by the Company,
including, without limitation, any information concerning plans for the Company to make a public offering of its securities or to be
acquired by or merged with or into another firm or entity.

14.

NO OBLIGATION TO MAINTAIN RELATIONSHIP.

The Participant acknowledges that: (i) the Company is not by this Agreement obligated to continue the Participant as an
employee of the Company or an Affiliate; (ii) the grant of the Option is a one-time benefit which does not create any contractual or
other right to receive future grants of options, or benefits in lieu of options; (iii) all determinations with respect to any such future
grants,  including,  but  not  limited  to,  the  times  when  options  shall  be  granted,  the  number  of  shares  subject  to  each  option,  the
option price, and the time or times when each option shall be exercisable, will be at the sole discretion of the Company; (iv) the
value  of  the  Option  is  an  extraordinary  item  of  compensation  which  is  outside  the  scope  of  the  Participant’s  employment  or
consulting  contract,  if  any;  and  (v)  the  Option  is  not  part  of  normal  or  expected  compensation  for  purposes  of  calculating  any
severance,  resignation,  redundancy,  end  of  service  payments,  bonuses,  long-service  awards,  pension  or  retirement  benefits  or
similar payments.

15.

NOTICES.

Any notices required or permitted by the terms of this Agreement shall be given by recognized courier service, facsimile,

registered or certified mail, return receipt requested, addressed as follows:

9

 
 
 
 
 
 
 
 
 
 
 
 
If to the Company:

G1 Therapeutics, Inc.
79 T.W. Alexander Drive

4401 Research Commons, Suite 105
Research Triangle Park, NC 27709
(919) 213-9835

Attention: Chief Executive Officer

If to the Participant, at the address set forth on the Stock Option Grant Notice

or to such other address or addresses of which notice in the same manner has previously been given.  Any such notice shall be
deemed to have been given upon the earlier of receipt, one business day following delivery to a recognized courier service or three
business days following mailing by registered or certified mail.

16.

GOVERNING LAW.

This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware, without giving
effect to the conflict of law principles thereof.  For the purpose of litigating any dispute that arises under this Agreement, the parties
hereby consent to exclusive jurisdiction in the State of Delaware and agree that such litigation shall be conducted in the state courts
in the District of Durham, North Carolina or the federal courts of the United States for the District of Durham, North Carolina.

17.

BENEFIT OF AGREEMENT.

Subject to the provisions hereof, this Agreement shall be for the benefit of and shall be binding upon the heirs, executors,

administrators, successors and assigns of the parties hereto.

18.

ENTIRE AGREEMENT.

This Agreement embodies the entire agreement and understanding between the parties hereto with respect to the subject
matter hereof and supersedes all prior oral or written agreements and understandings relating to the subject matter hereof (with the
exception of acceleration of vesting provisions contained in any other agreement with the Company).  No statement, representation,
warranty, covenant or agreement not expressly set forth in this Agreement shall affect or be used to interpret, change or restrict, the
express terms and provisions of this Agreement.

19.

MODIFICATIONS AND AMENDMENTS.

The terms and provisions of this Agreement may be modified or amended by the Administrator; provided, however, the

Administrator not take any action that is considered a

10

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
direct  or  indirect  “repricing”  for  purposes  of  the  stockholder  approval  rules  of  the  applicable  securities  exchange  or  inter-dealer
quotation system on which the Shares are listed, including any other action that is treated as a repricing under generally accepted
accounting  principles.    Any  modification  or  amendment  of  this  Agreement  shall  not,  without  the  consent  of  the  Participant,
adversely affect the Participant’s rights under this Agreement.

20.

WAIVERS AND CONSENTS.

The  terms  and  provisions  of  this  Agreement  may  be  waived,  or  consent  for  the  departure  therefrom  granted,  only  by
written document executed by the party entitled to the benefits of such terms or provisions.  No such waiver or consent shall be
deemed to be or shall constitute a waiver or consent with respect to any other terms or provisions of this Agreement, whether or not
similar.  Each such waiver or consent shall be effective only in the specific instance and for the purpose for which it was given, and
shall not constitute a continuing waiver or consent.

21.

DATA PRIVACY.

By entering into this Agreement, the Participant:  (i) authorizes the Company and each Affiliate, and any agent of the
Company or any Affiliate facilitating the grant of options under this Agreement, to disclose to the Company or any of its Affiliates
such  information  and  data  as  the  Company  or  any  such  Affiliate  shall  request  in  order  to  facilitate  the  grant  of  options;  and  (ii)
authorizes the Company and each Affiliate to store and transmit such information in electronic form for the purposes set forth in
this Agreement.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

11

 
 
 
 
 
 
 
 
 
Exhibit 10.18

Exhibit A

NOTICE OF EXERCISE OF STOCK OPTION

[Form for Shares registered in the United States]

To:

G1 Therapeutics, Inc.

IMPORTANT NOTICE:  This form of Notice of Exercise may only be used at such time as the Company has filed a Registration
Statement with the Securities and Exchange Commission under which the issuance of the Shares for which this exercise is being
made is registered and such Registration Statement remains effective.

Ladies and Gentlemen:

I  hereby  exercise  my  Stock  Option  to  purchase  _________  shares  (the  “Shares”)  of  the  common  stock,  $0.0001  par
value, of G1 Therapeutics, Inc. (the “Company”), at the exercise price of $________ per share, pursuant to and subject to the terms
of that Stock Option Grant Notice dated _______________, 20__.

I  understand  the  nature  of  the  investment  I  am  making  and  the  financial  risks  thereof.    I  am  aware  that  it  is  my
responsibility to have consulted with competent tax and legal advisors about the relevant national, state and local income tax and
securities laws affecting the exercise of the Option and the purchase and subsequent sale of the Shares.

I am paying the option exercise price for the Shares as follows:

Please issue the Shares (check one):

☐ to me; or

☐ to me and ____________________________, as joint tenants with right of survivorship,

at the following address:

Exhibit A-1

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
My mailing address for stockholder communications, if different from the address listed above, is:

Very truly yours,

Participant (signature)

Print Name

Date

Exhibit A-2

74373630v.1

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S‑8 (No. 333-218468) of G1 Therapeutics, Inc. of our report dated
February 21, 2018 relating to the financial statements, which appears in this Form 10‑K.

/s/ PricewaterhouseCoopers LLP
Raleigh, North Carolina
February 21, 2018

 
 
Exhibit 31.1

I, Mark A. Velleca, certify that:

1.  I have reviewed this annual report on Form 10-K of G1 Therapeutics, Inc.;

CERTIFICATIONS UNDER SECTION 302

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)  (Paragraph omitted pursuant to SEC Release Nos. 33-8238/34-47986 and 33-8392/34-49313);

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: February 21, 2018

/s/ Mark A. Velleca
Mark A. Velleca, M.D., Ph.D.
President and Chief Executive Officer
(Principal Executive Officer)

 
 
 
 
Exhibit 31.2

I, Barclay A. Phillips, certify that:

1.  I have reviewed this annual report on Form 10-K of G1 Therapeutics, Inc.;

CERTIFICATIONS UNDER SECTION 302

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)  (Paragraph omitted pursuant to SEC Release Nos. 33-8238/34-47986 and 33-8392/34-49313);

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: February 21, 2018

/s/ Barclay A. Phillips
Barclay A. Phillips
Chief Financial Officer and Senior Vice President, Corporate Development
(Principal Financial Officer)

 
 
 
 
 
 
CERTIFICATION UNDER SECTION 906

Exhibit 32.1

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United

States Code), the undersigned officer of G1 Therapeutics, Inc., a Delaware corporation (the “Company”), does hereby certify, to such officer’s
knowledge, that:

The Annual Report for the year ended December 31, 2017 (the “Form 10-K”) of the Company fully complies with the requirements

of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Form 10-K fairly presents, in all material
respects, the financial condition and results of operations of the Company.

Date: February 21, 2018

/s/ Mark A. Velleca, M.D., Ph.D.

  Mark A. Velleca, M.D., Ph.D.
  President and Chief Executive Officer

(Principal Executive Officer)

 
 
 
 
 
 
 
 
CERTIFICATION UNDER SECTION 906

Exhibit 32.2

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United

States Code), the undersigned officer of G1 Therapeutics, Inc., a Delaware corporation (the “Company”), does hereby certify, to such officer’s
knowledge, that:

The Annual Report for the year ended December 31, 2017 (the “Form 10-K”) of the Company fully complies with the requirements

of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Form 10-K fairly presents, in all material
respects, the financial condition and results of operations of the Company.

Date: February 21, 2018

/s/ Barclay A. Phillips

  Barclay A. Phillips.
  Chief Financial Officer and Senior Vice President, Corporate

Development
(Principal Financial Officer)