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Onconova Therapeutics

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FY2013 Annual Report · Onconova Therapeutics
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UNITED STATES
SECURITIES  AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 10-K

(Mark one)

(cid:1) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)  OF THE  SECURITIES

EXCHANGE ACT OF 1934

For the  fiscal year ended December 31, 2013

(cid:2)

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 001-36020
Onconova Therapeutics, Inc.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)

375 Pheasant Run, Newtown,  PA
(Address of principal executive offices)

22-3627252
(I.R.S. Employer
Identification No.)

18940
(Zip Code)

(267) 759-3680
(Registrant’s telephone number, including area code)

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

Title of each class

Name of  each exchange on which registered

Common Stock, par  value $.01  per  share

NASDAQ Global 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 (cid:2) No  (cid:1)

Indicate by  check  mark  if  the registrant  is not  required to file reports pursuant to Section 13 or Section 15(d) of the Act.

Yes (cid:2) No  (cid:1)

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 (cid:1) No (cid:2)

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 (cid:1) No  (cid:2)

Indicate by  check mark if disclosure  of delinquent filers pursuant to Item 405 of Regulation S-K 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. (cid:2)

Indicate by  check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a
smaller reporting company. See the definitions  of  ‘‘large accelerated filer,’’ ‘‘accelerated filer’’ and ‘‘smaller reporting company’’
in  Rule  12b-2 of the Exchange Act.
Large  accelerated  filer (cid:2)

Smaller reporting company  (cid:2)

Accelerated  filer (cid:2)

Non-accelerated filer (cid:1)
(Do  not check if  a
smaller reporting company)

Indicate by  check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Act). Yes (cid:2) No (cid:1)
As of June 28, 2013  (the  last  business  day  of  the registrant’s most recently completed second fiscal quarter), the
registrant’s common stock  was not  listed on  any  exchange or over-the-counter market. The registrant’s common stock began
trading  on  the NASDAQ  Global Market  on  July 25,  2013. As of February 28, 2014, the aggregate market value of the
registrant’s voting stock held by  non-affiliates  was approximately $107.3 million based on the number of shares held by
non-affiliates as of February 28, 2014, and the  last reported sale price of the registrant’s common stock on February 28, 2014.

There  were 21,638,029 shares of  Common Stock outstanding as of February 28, 2014.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of our Proxy  Statement  for the 2014  Annual Meeting of Stockholders, to be filed within 120 days of

December 31, 2013, are incorporated by  reference  in Part III. Such Proxy Statement, except for the parts therein which have
been specifically  incorporated by  reference,  shall  not be deemed ‘‘filed’’ for the purposes of this Annual Report on Form 10-K.

ONCONOVA THERAPEUTICS, INC.

INDEX TO REPORT ON FORM 10-K

PART I

Item 1:
Business . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 1A: Risk Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 1B: Unresolved Staff Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 2:
Legal Proceedings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 3:
Mine Safety Disclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 4:

PART II

Item 5:

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

Item 6:
Item 7:

Purchases of Equity Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selected Financial Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Management’s Discussion  and  Analysis of Financial Condition  and Results of

Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 7A: Quantitative and Qualitative Disclosures About Market Risk . . . . . . . . . . . . . . . . . .
Financial Statements and Supplementary  Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 8:
Changes in and Disagreements With Accountants on Accounting  and Financial
Item 9:

Disclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 9A: Controls and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 9B: Other Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PART III
Item 10: Directors, Executive Officers  and Corporate Governance . . . . . . . . . . . . . . . . . . . . .
Executive Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 11:
Security Ownership of Certain  Beneficial  Owners and  Management and Related
Item 12:

Item 13:
Item 14:

Stockholder Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certain Relationships and Related Transactions, and Director Independence . . . . . . .
Principal Accountant Fees  and  Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PART IV

Page

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95

Item 15:

Exhibits, Financial Statement Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

95

i

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS AND INDUSTRY DATA

This Annual Report on Form 10-K (‘‘Annual Report’’) includes forward-looking statements. We

may, in some cases, use terms such as  ‘‘believes,’’  ‘‘estimates,’’  ‘‘anticipates,’’ ‘‘expects,’’  ‘‘plans,’’
‘‘intends,’’ ‘‘may,’’ ‘‘could,’’ ‘‘might,’’ ‘‘will,’’  ‘‘should,’’ ‘‘approximately’’ or other  words that convey
uncertainty of future events or outcomes to identify these forward-looking statements.  Forward-looking
statements appear in a number of places  throughout this Annual Report and include statements
regarding our intentions, beliefs, projections,  outlook, analyses or current expectations concerning,
among other things, our ongoing and  planned preclinical development and clinical  trials, the timing of
and our ability to make regulatory filings  and  obtain and maintain regulatory  approvals for our  product
candidates, our intellectual property position,  the degree of clinical  utility of our products,  particularly
in specific patient populations, our ability  to  develop  commercial functions, expectations regarding
clinical trial data, our results of operations, cash needs, financial condition, liquidity,  prospects, growth
and strategies, the industry in which we operate and the  trends that may affect the industry or us.

By  their nature, forward-looking statements involve risks and uncertainties because  they relate to
events, competitive dynamics and industry change,  and depend on the economic  circumstances that may
or may not occur in the future or may  occur  on longer or shorter timelines  than anticipated. Although
we believe that we have a reasonable  basis for  each forward-looking  statement  contained in this Annual
Report, we caution you that forward-looking statements are not  guarantees  of future performance and
that our actual results of operations, financial condition and liquidity, and the development  of  the
industry in which we operate may differ materially from  the forward-looking statements contained  in
this  Annual Report. In addition, even  if our results of operations, financial condition and  liquidity, and
events in the industry in which we operate  are consistent  with the forward-looking statements contained
in this Annual Report, they may not be predictive of results  or developments  in future  periods.

Actual results could differ materially from  our  forward-looking statements due to a  number of

factors, including risks related to:

(cid:127) our estimates regarding expenses, future revenues, capital requirements and needs for  additional

financing;

(cid:127) the success and timing of our preclinical studies  and clinical trials;

(cid:127) the difficulties in obtaining and maintaining regulatory approval of our  product candidates,  and

the labeling under any approval we may obtain;

(cid:127) our plans and ability to develop and commercialize our product candidates;

(cid:127) our failure to recruit or retain key scientific or management personnel or to retain our executive

officers;

(cid:127) the size and growth of the potential markets  for our product  candidates and our ability to serve

those markets;

(cid:127) regulatory developments in the United States and foreign countries;

(cid:127) the rate and degree of market acceptance of any  of our product candidates;

(cid:127) obtaining and maintaining intellectual property  protection for our product  candidates and our

proprietary technology;

(cid:127) the successful development of our commercialization capabilities, including sales and  marketing

capabilities;

(cid:127) recently enacted and future legislation regarding  the healthcare system;

(cid:127) the success of competing therapies and products  that are  or  become available;  and

ii

(cid:127) the performance of third parties, including contract  research organizations, or  CROs and  third-

party manufacturers.

Any forward-looking statements that  we make in this Annual Report speak  only  as of the date of

such statement, and we undertake no obligation  to  update such  statements to reflect events or
circumstances after the date of this Annual Report or  to  reflect the occurrence  of unanticipated events.
Comparisons of results for current and  any  prior periods  are not intended to express  any future trends
or indications of future performance,  unless expressed  as such,  and  should only be viewed as  historical
data.

You should also read carefully the factors described in the  ‘‘Risk Factors’’ section of  this Annual

Report and elsewhere to better understand the risks and uncertainties  inherent in  our  business  and
underlying any forward-looking statements. As a  result of these factors,  we  cannot assure you that the
forward-looking statements in this Annual  Report  will prove to be accurate. Furthermore, if our
forward-looking statements prove to be  inaccurate, the  inaccuracy  may  be material. In  light of the
significant uncertainties in these forward-looking statements, you should not  regard these statements as
a representation or warranty by us or  any other person that we  will achieve our  objectives  and plans in
any specified timeframe, or at all.

We  obtained the industry, market and competitive position data in  this  Annual Report  from our

own internal estimates and research as well as from industry and general  publications and research
surveys  and studies conducted by third parties. Industry publications and surveys generally  state that the
information contained therein has been obtained from  sources believed to  be  reliable. We believe this
data is accurate in all material respects  as of the date  of  this Annual Report.

iii

ITEM 1. BUSINESS

Overview

PART I

We  are a clinical-stage biopharmaceutical company focused on discovering  and developing novel

small molecule drug candidates to treat  cancer. Using our proprietary chemistry platform, we have
created an extensive library of targeted  anti-cancer agents designed to work against specific  pathways
that are important to cancer cells. We  believe  that  the drug candidates  in our pipeline have the
potential to be efficacious in a variety  of  cancers  without causing harm to normal cells. Currently, we
have three clinical-stage product candidates  and  six preclinical programs.

Rigosertib, our most advanced product candidate, is being tested in clinical studies  for

myelodysplastic syndromes, or MDS, and  head  and neck cancers.  To  date, we have enrolled more than
1,000 patients in rigosertib trials in hematological  diseases and solid tumors. We  are testing  both
intravenous and oral formulations of rigosertib,  referred to as rigosertib IV and rigosertib Oral.

In February 2014, we reported that the  Phase 3  ‘‘ONTIME’’ trial  of  rigosertib  IV in patients with

higher  risk MDS who had progressed on,  failed  to  respond to or relapsed  after prior therapy with
hypomethylating agents, or HMAs, did  not meet the  primary  endpoint of improving overall  survival
compared to best supportive care, or BSC. The ONTIME trial enrolled  299 patients, including
199 patients in the rigosertib IV plus  BSC  arm. Median overall survival in  the rigosertib IV plus  BSC
arm was 8.2 months compared to 5.8  months in BSC only arm.  Treatment with  rigosertib  IV plus BSC
did not demonstrate a statistically significant improvement  in median overall  survival when compared to
BSC only (Hazard Ratio=0.86; p-value=0.27). However, a post-hoc  analysis demonstrated a statistically
significant increase in median overall  survival  in the subset of patients who had progressed on  or failed
to respond to previous treatment with  HMAs, thus demonstrating potential activity  of rigosertib in
these MDS patients. In this subset of patients, the median overall survival was 8.5 months in the
rigosertib IV plus BSC arm compared to 4.7  months in  BSC  only  arm (Hazard Ratio=0.67;
p-value=0.022). In this patient population, 127 patients  were  in the treatment  arm and 57 patients were
in the BSC arm. The other subset, which  was comprised of patients who  had relapsed after responding
to previous treatment with HMAs (115  of 299 patients enrolled), did  not show a statistically significant
survival benefit. Preliminary safety analysis from the trial  indicates that  rigosertib was generally well
tolerated in the study population. We will consult with regulatory  authorities to determine the next
steps for rigosertib IV in higher risk  MDS.

A Phase 3 trial of rigosertib IV in higher risk  MDS patients who have progressed on  HMA
therapy is now enrolling patients in U.S.  and European Sites.  This  single-arm study is designed for 90
patients. Currently, 19 patients have  been  enrolled  in this  study.

In December 2013, we reported results from a  Phase 2  trial with  rigosertib  Oral in transfusion-

dependent lower risk MDS at the 2013  American  Society of Hematology (ASH)  Annual  Meeting.
Based on Phase 2 data presented at  the 2013  ASH meeting, we consulted  with the U.S. Food and Drug
Administration, or FDA, regarding further development of rigosertib  Oral  for transfusion-dependent
lower risk MDS patients. As a result  of  this dialogue, we have  designed a pivotal Phase  3 protocol. We
intend to seek a Special Protocol Assessment, or SPA,  for this randomized, double-blind, placebo-
controlled study in lower risk MDS patients who do  not  respond  to  erythropoiesis-stimulating  agents, or
ESAs, and are dependent on packed red blood  cell  transfusions  to  alleviate their  anemia. Total number
of patients, entry criteria, secondary endpoints, and the statistical  analysis plan will be finalized during
the SPA process. We project to start enrollment in the Phase 3 study in the second  half of 2014  at
multiple sites in the United States and  Europe. We are  also evaluating a prognostic  tool based on
genomic methylation analysis in this patient population. Currently, a validation cohort of  20 patients is
being enrolled in a Phase 2 trial with  the objective of assessing the value of the  prognostic  genomic

1

methylation marker for future studies. The FDA  has encouraged us  to  discuss these results with them
for potential integration of this analytical tool  in the pivotal study. We expect to report  on these studies
and discussions in the second half of 2014. We have obtained rights to intellectual  property covering
this  method of prognosis from Columbia University.

We  are also evaluating rigosertib Oral in combination  with azacitidine in a  Phase 1/2 trial  for
first-line treatment of MDS. A Phase 1/2 study is now underway to evaluate the potential synergistic
activity of rigosertib and azacitidine. In  this study,  the full indicated dose  of azacitidine is given in
combination with escalating doses of  rigosertib Oral in successive  cohorts. Rigosertib  doses of
140-560  mg given two times daily (BID)  will be tested. After the  dose-finding segment of  the trial is
completed, the second part of the trial will evaluate  the selected dose  in additional  patients. A total of
up to 40 patients are planned to be enrolled in  this study.  This  study  is now  running in  U.S. sites and
has enrolled seven patients. We expect to provide updates on safety,  tolerability and preliminary
evidence of anti-tumor activity in the  second half of 2014.

We  are also testing rigosertib in solid tumors. A Phase 2  clinical trial is underway in head  and

neck cancer.

In December 2013, following a pre-planned interim analysis, we announced the  discontinuation  of
a Phase 3 study of rigosertib in combination with gemcitabine  in first-line metastatic pancreatic cancer.

Rigosertib has been granted orphan drug status for MDS in the  United States, Europe, and Japan.
Baxter Healthcare SA, or Baxter, a subsidiary  of Baxter  International Inc., has commercialization rights
for rigosertib in Europe and SymBio  Pharmaceuticals Limited,  or SymBio, has commercialization rights
in Japan and  Korea. We retain development and commercialization rights to rigosertib in all other
territories, including in the United States.

Rigosertib inhibits two important cellular signaling pathways  involving phosphoinositide 3-kinase,

or PI3K, and polo-like kinase, or PLK, through a novel mechanism of  action.  PI3K signaling  promotes
the growth and survival of cells under  stressful conditions, such  as under  low oxygen  levels that are
often found in tumors. By inhibiting the PI3K pathway  in cancer cells, rigosertib promotes tumor  cell
apoptosis, or programmed cell death. The  PLK pathway has a  critical  role in maintaining proper
chromosome organization and sorting during  cell  division. By modulating the  PLK  pathway, rigosertib
stops cancer cells at late stages of the  cell  division cycle,  which leads to chromosome disorganization
and death in these cells. In normal cells, rigosertib reversibly pauses progression of the  cell  cycle  in the
early stages, without causing harm or  death to these cells. We recently presented new  data  on the  mode
of action of rigosertib. These data indicate that rigosertib binds to the  Ras Binding Domain (RBD)
found in many signaling proteins, including Raf kinases and PI3K.  This specific binding disrupts
protein-protein interactions necessary for  signal  transduction in the  cell.  This signal  transduction
inhibitory activity suggests novel ways in  which cellular pathways could be interrupted by rigosertib and
informs the design of future translational  studies.

Onconova is developing rigosertib IV  and rigosertib Oral for  the following unmet  medical  needs:

(cid:127) Rigosertib IV as a second-line therapy in higher risk MDS: In February 2014, we reported that the
Phase 3 ONTIME trial of rigosertib IV  in patients with  higher risk MDS who  had progressed
on, failed to respond to or relapsed after prior therapy  with HMAs did not  meet the primary
endpoint  of improving overall survival compared to BSC. However, a post-hoc  analysis
demonstrated a statistically significant increase in median overall  survival  in the subset of
patients who had progressed on or failed  to  respond  to  previous treatment  with HMAs, thus
demonstrating potential activity of rigosertib in these MDS patients. Preliminary safety  analysis
from the trial indicates that rigosertib  was generally well  tolerated  in the  study population.  We
will consult with regulatory authorities to determine the next steps for rigosertib IV in higher
risk MDS.

2

MDS is a group of blood disorders caused by altered bone marrow function. We  believe that
there is a significant medical need for new therapies to treat MDS  patients  who have failed or
cannot tolerate treatment with the hypomethylating drugs azacitidine  (Vidaza(cid:3)) or decitabine
(Dacogen(cid:3)), which represent  the current standard of care for  higher risk MDS patients. To our
knowledge, there are no other current  Phase 3  trials in this patient population.  A provider of
marketing analytics and data to the biopharmaceutical industry has estimated that, for  2011 in
the United States, the diagnosed incidence  of MDS was approximately 15,600 and the
prevalence of MDS was approximately 52,000. According to the same marketing analytics firm,
approximately 23% of MDS patients are  estimated  to  fall into the  categories of MDS
characterized as higher risk.

(cid:127) Rigosertib Oral as a first-line therapy in transfusion-dependent lower risk MDS: We reported results
from a Phase 2 trial with rigosertib Oral in  transfusion-dependent  lower risk MDS at  the 2013
ASH Annual Meeting. Overall, transfusion  independence  was  observed  in 39% (14 of 36) of
patients receiving at least eight weeks of the intermittent dosing schedule of rigosertib Oral. A
combined response rate of 53% (according  to  International Working Group criteria)  was also
observed  in these patients. Following recent consultations with the FDA, we expect  to  begin  a
Phase 3 trial of rigosertib Oral in patients  with transfusion-dependent lower risk MDS in  the
second half of 2014 at multiple sites  in the United  States and Europe.

We  believe transfusion-dependent MDS  is a serious unmet medical need, and  the quality of  life
of these patients could be improved by lowering or eliminating transfusions. Approximately 77%
of MDS patients are estimated to fall into the  categories of MDS characterized as lower  risk.

(cid:127) Combination therapy with rigosertib Oral and azacitidine in first-line MDS: We are testing the

combination of rigosertib Oral and azacitidine in  a Phase  1/2 study of up  to 40 first-line MDS
patients. This trial will determine the  maximum tolerated dose of rigosertib that can be given
with azacitidine and assess the safety, tolerability, and activity of the combination. We  expect to
provide updates on this trial in the second half of 2014.

(cid:127) Rigosertib Oral in head and neck cancers: We are evaluating rigosertib Oral in  a Phase 2  trial in
patients with head and neck cancers.  Enrollment of patients in the first phase  of  the trial has
been completed, and next steps in this patient population  will be determined in the  second
quarter of 2014.

(cid:127) Rigosertib IV in combination with gemcitabine for first-line  metastatic pancreatic cancer: After

conducting a pre-planned interim analysis of 165 patients  in December 2013, we  announced the
discontinuation of  this trial. The Data Safety Monitoring Board determined that the combination
of rigosertib and gemcitabine is unlikely to demonstrate a statistically significant improvement in
overall survival compared to gemcitabine alone.

We  entered into a development and licensing agreement with Baxter in 2012  to  commercialize
rigosertib in Europe. In 2011, we entered into a  licensing agreement with SymBio to commercialize
rigosertib in Japan and Korea. We have  retained development  and commercialization rights to
rigosertib in the rest of the world, including the United States. We will explore  a variety  of  alternatives
for the commercialization of rigosertib  in territories we currently retain, including direct
commercialization, co-promotion or selective out-licensing of rights to a third party.

Our second clinical-stage product candidate  is ON  013105, or briciclib, a small molecule targeting
an important regulatory protein, cyclin  D1, which is often found at elevated  levels in  cancer cells. We
are planning to resume Phase 1 clinical development of briciclib in  2014 with  a multi-site dose
escalation study in patients with advanced solid tumors refractory to current  therapies.

Our third clinical-stage product candidate, recilisib, is being developed in collaboration with  the
U.S. Department of Defense, or DoD, for  acute radiation syndromes, or ARS.  We  have conducted

3

animal efficacy studies and human Phase  1 clinical  trials of recilisib. This product  candidate is  being
developed under the FDA’s Animal Efficacy Rule, which permits marketing approval for new  medical
countermeasures by relying on evidence from  animal studies in appropriate animal  models to support
efficacy in humans. We have completed four Phase 1 trials to evaluate the  safety and  pharmacokinetics
of recilisib in healthy human adult subjects using both subcutaneous  and oral formulations,  referred to
as recilisib SC and recilisib Oral. We  have  received two orphan  drug  designations  for recilisib for ARS
in the United States.

In addition, we are also developing six  preclinical stage molecules that target important enzymes or

proteins involved in cell growth, metabolism or  cell  division.

We  have broad-based capabilities that span  drug discovery and clinical development, from
medicinal chemistry and evaluation in  biochemical, cell-based and  animal models, through Phase 3
trials and regulatory filings in the United States,  Europe and  India.  Our discovery program is based on
a proprietary chemistry platform comprising  more than  150 novel core chemical  structures. Our
chemistry and screening approaches  aim  to discover new drug candidates  that  kill cancer cells,  with
minimal toxicity to normal cells. Our  intellectual property portfolio includes more than 100 issued
patents and over 90 patent applications,  either  owned by us or licensed  exclusively to us, including
patents covering our most advanced  product candidate,  rigosertib.  These patents and licenses cover
composition-of-matter, manufacturing  process,  formulations and method-of-treatment claims for  our
clinical-stage product portfolio.

Our Strategy

We  are committed to providing novel treatments to cancer patients, particularly in  poorly served or
unmet medical indications. We are focused on  discovering and developing  targeted  small molecule anti-
cancer product candidates. The key components of our strategy are to:

Seek Regulatory Approval for Rigosertib

(cid:127) For higher risk MDS patients who have failed azacitidine or decitabine  therapy: We reported top-

line overall survival results from a Phase 3 trial  with rigosertib IV in  higher risk MDS patients in
February 2014. We intend to discuss  the results  of this  trial with  regulatory authorities in the
United States and Europe with the goal of  determining next steps in  advancing development  of
rigosertib IV in higher risk MDS.

(cid:127) For first-line treatment of transfusion-dependent lower risk MDS  patients: We reported response

and safety data from the first Phase 2  trial  of rigosertib Oral in transfusion-dependent lower risk
patients at the ASH Annual Meeting in December 2013. Following regulatory input  from the
FDA, we expect to start our Phase 3 trial  in this  indication  with rigosertib Oral in the  second
half of 2014.

(cid:127) For first-line treatment of MDS patients in  combination  with azacitidine: We are testing the

combination of rigosertib Oral and azacitidine (Vidaza(cid:3), a hypomethylating agent indicated for
first-line treatment of MDS patients)  in a Phase 1/2 study. We expect to provide  updates  on this
trial in the second half of 2014.

(cid:127) For treatment of solid tumors: We are currently evaluating rigosertib Oral  in a Phase 2 trial  as

treatment for head and neck cancer. We  expect to determine the next steps  for this program in
the second quarter of 2014.

4

Continue Development of Our Product Pipeline

(cid:127) Initiate clinical development of briciclib for all  tumor types: We are planning to resume Phase 1

development of briciclib in 2014 with a multi-site dose escalation study in patients with  advanced
solid tumors refractory to current therapies.

(cid:127) Continue animal efficacy studies for recilisib: We are seeking collaborations and government

funding to support nonhuman primate  efficacy studies as well  as to identify predictive
biomarkers in animals.

(cid:127) Advance  a preclinical product candidate towards  clinical testing: Building on the experience and

knowledge we have gained from our clinical-stage product  candidates, we have identified several
lead molecules in our preclinical pipeline.  Two of these molecules  are  being developed in
collaboration with GVK Biosciences, or GVK, a CRO  based in India.  We intend to explore
additional collaborations to further the  development of these product  candidates.

(cid:127) Maintain Flexibility in Commercializing and Maximizing the Value of our Programs

(cid:127) While retaining U.S. and other territorial rights, we  have entered into collaborations  with Baxter
to commercialize rigosertib in Europe  and with SymBio to commercialize rigosertib in Japan and
Korea. We will explore a variety of alternatives for the commercialization of rigosertib in
territories we currently retain, including direct commercialization,  co-promotion or selective
out-licensing of rights to a third party.

Our Product Candidates

Clinical Programs

The development status of our three  clinical-stage product  candidates is summarized  below:

Phase 1

Phase 2

Phase 3

Status / Anticipated Milestones

Clinical-Stage Product Candidates

Rigosertib Single-agent 

2nd-line Higher Risk MDS (IV)

1st-line Lower Risk MDS (Oral)

Head & Neck Cancer (Oral)

Rigosertib in Combination

1st-line MDS (Oral)
Azacitidine Combination

(cid:127)  Baxter has commercialization rights for Europe; 

(cid:127)  SymBio has commercialization rights for Japan and Korea;    

(cid:127)  Onconova retains commercialization rights in all other territories, including the United States.

Briciclib (ON 013105)

All Cancers (IV)

(cid:127)  Onconova retains commercialization rights world-wide.

Recilisib

Acute Radiation Syndromes
                              (SC & Oral) 

(cid:127)  Onconova retains commercialization rights world-wide.

5

(cid:127)  Discussions with Regulatory Authorities

(cid:127)  Advance to Phase 3

(cid:127)  Enrollment Complete in First Phase of
   Trial; Next Steps 2Q14

(cid:127)  Phase 2 Dosing in 2H-2014

(cid:127)  Resume Clinical Study

(cid:127)  Seeking Government Funding

18MAR201405203343

Rigosertib—Inhibitor of Phosphoinositide 3-Kinase  & Polo-Like Kinase Pathways

Overview

Rigosertib is our most advanced product candidate and has been extensively  tested in clinical  trials,

which  have collectively enrolled more  than 1,000 patients.

In February 2014, we reported that the  Phase 3  ONTIME trial  of  rigosertib  IV in patients with

higher  risk MDS who had progressed on,  failed  to  respond to or relapsed  after prior therapy with
HMAs did not meet the primary endpoint of improving overall  survival  compared to BSC. However, a
post-hoc analysis demonstrated a statistically significant increase in  median overall survival  in the subset
of patients who had progressed on or  failed to respond  to  previous treatment with HMAs, thus
demonstrating potential activity of rigosertib in these MDS patients. Preliminary safety  analysis from
the trial indicates that rigosertib was generally  well tolerated in the study population. We will  consult
with regulatory authorities to determine the next  steps for rigosertib IV  in higher risk MDS.

Rigosertib Oral, single agent, is being  studied as  first-line therapy  in two  Phase 2 trials in patients

with transfusion-dependent lower risk MDS.  We reported response and safety data from the  first
Phase 2 trial at the ASH Annual Meeting in  December  2013.  Following  regulatory input from the
FDA, we expect to start our Phase 3 trial  in this  indication  in the second half of 2014. Rigosertib Oral
is also being studied as a first-line therapy in  combination with azacitidine in MDS  in a Phase 1/2
study. We expect to provide updates on this  trial in the  second half  of 2014.

Finally, we are evaluating rigosertib Oral in a Phase 2 trial in patients  with head  and neck cancers.

Enrollment of patients in the first phase  of  the trial has  been completed, and  next steps in this
indication will be determined in the second quarter  of  2014.

Rigosertib Inhibits Signaling Pathways Associated with Cancer Cell Growth and Survival

Rigosertib inhibits two important cellular signaling pathways  involving phosphoinositide 3-kinase,

or PI3K, and polo-like kinase, or PLK, through a novel mechanism of  action.  PI3K signaling  promotes
the growth and survival of cells under  stressful conditions, such  as under  low oxygen  levels that are
often found in tumors. By inhibiting the PI3K pathway  in cancer cells, rigosertib promotes tumor  cell
apoptosis, or programmed cell death. The  PLK pathway has a  critical  role in maintaining proper
chromosome organization and sorting during  cell  division. By modulating the  PLK  pathway, rigosertib
stops cancer cells at late stages of the  cell  division cycle,  which leads to chromosome disorganization
and death in these cells. In normal cells, rigosertib reversibly pauses progression of the  cell  cycle  in the
early stages, without causing harm or  death to these cells. We recently presented new  data  on the  mode
of action of rigosertib. These data indicate that rigosertib binds to the  Ras Binding Domain (RBD)
found in many signaling proteins, including Raf kinases and PI3K.  This specific binding disrupts
protein-protein interactions necessary for  signal  transduction in the  cell.  This signal  transduction
inhibitory activity suggests novel ways in  which cellular pathways could be interrupted by rigosertib and
informs the design of future translational  studies.

Myelodysplastic Syndromes

MDS is a group of blood disorders that affect bone marrow function. MDS typically affects
patients over the age of 65. In MDS, bone marrow becomes  dysplastic, or  defective.  The blood cells
produced do not develop normally, such  that too  few  healthy  blood  cells are released into the blood
stream, which leads to low blood cell counts,  or cytopenias.  Thus,  many patients with  MDS require
frequent blood transfusions. In most cases,  the disease  worsens and the  patient  develops  progressive
bone marrow failure. In advanced stages  of the  disease,  immature blood cells, or  blasts,  leave the bone
marrow and enter the blood stream, leading to acute myelogenous leukemia,  or AML, which  occurs in
approximately one-third of patients with  MDS.

6

Based on Surveillance Epidemiology  and End Results  (SEER) data from the National  Cancer
Institute, a marketing analytics firm has  estimated the 2011  incidence of MDS  at approximately 15,600
cases and the prevalence of MDS at  approximately  52,000 cases in  the United States.  We believe  that
the actual incidence numbers may be  higher, due  to  underdiagnosing and underreporting of new cases
of MDS to centralized cancer registries, and that the incidence of MDS in  the United  States  is likely to
increase, due to an aging population, improved disease awareness and diagnostic precision, and an
increase in the number of cases of secondary, often  chemotherapy-induced, MDS.

MDS is typically diagnosed using routine blood  tests  or by  observing symptoms, such as shortness

of breath, weakness, easy bruising or bleeding, or  fever  with frequent infections. A diagnosis of MDS is
confirmed by evaluating a bone marrow biopsy/aspirate showing dysplastic  changes, and,  in more
advanced cases, the presence of excess blasts, meaning  that blasts account for  more than 5% of the
total number of nucleated cells in the bone  marrow. Because the bone  marrow  and blood cells in MDS
patients can undergo different kinds of abnormal  changes, several classification systems have  been
developed to gauge the severity of disease  and help determine  prognosis and  treatment strategy. We
use two standard classification systems, the French-American-British morphological classification
system, or the FAB system, as modified  by the World Health  Organization, or WHO, and the
International Prognostic Scoring System,  or IPSS, to define  patient  inclusion criteria for our  rigosertib
trials in MDS:

(cid:127) FAB Classification/WHO Diagnostic Criteria. In 1999, WHO modified the FAB system for  MDS

that had been based primarily on the percentage of blasts in the  bone marrow and  blood.
Sub-categories under the WHO classification  are:  Refractory anemia, or RA  (less than 5%
blasts), RA with ringed sideroblasts,  or RARS, refractory  cytopenia  with multilineage dysplasia,
or RCMD, RA with excess blasts-1 (5-9% blasts), or  RAEB-1,  RAEB-2 (10-19% blasts), MDS
with isolated deletion of the long arm of chromosome  5, or  del(5q),  and MDS unclassified,  or
MDS-U. Patients classified as RAEB in transformation (21-29% blasts),  or RAEB-t, under the
FAB system are reclassified in the WHO  system as AML patients.

(cid:127) IPSS Diagnostic Criteria. IPSS ranks the severity of chromosome  abnormalities, number of

cytopenias, and percentage of bone marrow blasts observed at diagnosis to calculate a four-level
risk score: Low, Intermediate-1, Intermediate-2 and High.  MDS patients are generally classified
using IPSS in order to assess the risk of dying or having  their disease  progress  to  AML.

Patients with RAEB-1, RAEB-2 or RAEB-t under the FAB/WHO criteria or  patients  with IPSS
risk scores of Intermediate-2 or High are generally considered to have higher  risk MDS,  with a median
survival of less than two years. According to a marketing analytics firm,  approximately  23% of MDS
patients are classified in these higher risk categories.

Patients with IPSS scores of Low and  Intermediate-1 are generally considered to have  lower risk
MDS, with an overall survival of approximately three  to  six years. Approximately 77% of MDS patients
are classified in these lower risk categories.

Treating Myelodysplastic Syndromes

Stem cell or bone marrow transplantation is  a potentially curative therapy  for MDS. However,
since most patients with MDS are elderly  and therefore ineligible for transplantation,  this  option is
generally considered only for the small  proportion of younger MDS patients.

We  believe that most higher risk and  some lower risk MDS  patients are treated with  azacitidine

and decitabine, the hypomethylating  drugs approved in the United  States for  treatment of MDS. A
provider of information, services and technology for the healthcare industry estimates  that  in the year
ended June 2012, approximately 12,500 MDS  patients in the United  States received treatment with
hypomethylating agents. For 2012, revenues of azacitidine were reported to be approximately

7

$327 million in the United States and  revenues for  decitabine were reported  to  be  approximately
$225 million in North America. Generic  versions  of  azacitidine and decitabine  entered the U.S. market
in 2013.

A significant number of higher risk MDS patients  fail or  cannot tolerate treatment with azacitidine
or decitabine, which represent the current standard  of  care for higher risk MDS patients, and almost all
patients who initially respond to therapy  eventually relapse. Median  survival time of MDS patients who
have failed hypomethylating drugs is less than  six months. Accordingly, we believe that a new  therapy
that would extend survival in these patients  would represent a  major contribution in the treatment  of
MDS.

Hypomethylating drugs work by inhibiting the  methylation of  DNA. Methylation  is a biochemical

process involving the addition of a methyl  group to DNA and  plays an important role in gene
expression during cell division and differentiation. By  inhibiting  methylation, hypomethylating drugs
cause  the death of rapidly dividing cells,  including  cancer cells that are no longer responsive to normal
growth control mechanisms. Hypomethylation  may also restore normal  function to genes that are
critical for differentiation and proliferation. The mechanisms underlying lack of  response  to  and/or
resistance to hypomethylating agents in patients are not well  understood. Studies performed with
decitabine in cultured cell lines revealed lowered expression of enzymes required for drug transport and
activation.

By  contrast, rigosertib works by inhibiting  the PI3K  pathway, a cellular  signaling pathway that

promotes the growth and survival of  cells  under stressful conditions, such as under low oxygen levels
that are often found in tumors, and by  modulating PLK pathway activity, which leads  to  chromosome
disorganization and death in cancer cells. We believe that,  because  rigosertib has a mechanism  of action
that is different from hypomethylating  agents, it may be active in patients who have  failed treatment
with those drugs.

In the case of lower risk MDS patients,  those categorized as Low  or Intermediate-1 risk with

transfusion-dependent anemia and del(5q) cytogenetic  abnormality are  generally  treated with
lenalidomide (Revlimid(cid:3)). For all other lower risk MDS patients, supportive care employing blood
products, such as red blood cell and platelet transfusions,  and erythroid stimulating agents, is the
mainstay of therapy. Frequent transfusions  introduce many risks, including iron  overload, blood  borne
infections and immune-related reactions. We believe that a  therapeutic  agent that could lower or
eliminate the need for transfusions over  an  extended period of  time  would fulfill a  significant unmet
medical need for this patient population.

Clinical Development of Rigosertib IV in Higher Risk Myelodysplastic Syndromes

We  initiated clinical trials with rigosertib in MDS in 2008. We  recently announced  topline survival

results from the multi-center Phase 3  ONTIME trial with rigosertib IV as  a single  agent in patients
with MDS who had progressed on, failed  to respond  to  or relapsed  after prior  therapy with HMAs.
The ONTIME trial is a randomized, controlled study, where eligible  patients must have  progressed on,
failed to respond to or relapsed after prior therapy with HMAs,  have excess blasts (5-30%  blasts) and
have at least one cytopenia. There is  currently  no approved drug for this  group of patients and the
current standard treatment consists of  best supportive  care, which is treatment intended to manage
disease-related symptoms. In the ONTIME trial, both  groups of patients received best  supportive care,
with the treatment group of patients also receiving rigosertib.  The  study  employed a  2:1 randomization
in which two-thirds of the patients received rigosertib plus best supportive  care, and one-third of
patients received only best supportive care. The protocol for this trial was developed under an SPA.
The EMA also provided Scientific Advice.

8

The primary objective of the ONTIME  trial was to ascertain whether treatment with rigosertib
leads to an overall survival benefit. Secondary  objectives  included evaluation of other responses, such as
improvements in bone marrow and cytogenetic  and blood  profiles, according to standard response
criteria for MDS defined by the 2006  WHO International Working Group,  and to measure  patients’
quality of life scores and times to transition to AML. In this study, rigosertib was administered as  a
continuous intravenous infusion over  a period  of  three days  with a bag  change every 24 hours. Patients
used an ambulatory pump, avoiding the  need for hospital stays. We completed enrollment in the
ONTIME trial in July 2013.

The ONTIME trial was conducted at  42 sites  in the United States and  at  47 sites in Belgium,

France, Germany, Italy and Spain. A  total  of 299 patients were enrolled in the trial.  Among the
299 patients, 179 were enrolled at U.S.  sites.  In February  2014, we reported top-line  overall  survival
results from this trial. Median overall survival in the rigosertib  IV  plus BSC arm  was  8.2 months
compared to 5.8 months in BSC only  arm. Treatment with rigosertib IV plus  BSC did not demonstrate
a statistically significant improvement in  median overall  survival when compared to BSC  only  (Hazard
Ratio=0.86; p-value=0.27). However, a  post-hoc analysis demonstrated a statistically  significant
increase in median overall survival in the  subset  of patients who had progressed on or failed to respond
to previous treatment with HMAs, thus  demonstrating potential  activity of rigosertib in these MDS
patients. In this subset of patients (184  of  299 enrolled patients), the median overall  survival was
8.5 months in the rigosertib IV plus  BSC  arm  compared to 4.7 months in BSC  only  arm (Hazard
Ratio=0.67; p-value=0.022). Severe adverse  events were  uncommon,  with a similar profile of  serious
adverse events in both study arms. Grade  3/4  treatment-related  hematologic and  non-hematologic
adverse events were reported in less  than  7%  and 3%  of  patients,  respectively.  Incidence  of all grades
of treatment-related nausea, diarrhea,  fatigue and constipation were 22%, 17%,  17%, and  15%,
respectively. All other treatment-related  adverse events were reported in less than 10% of patients.
Additional details, including secondary endpoints, will  be  presented at the 2014 American Society of
Clinical Oncology (ASCO) Annual Meeting.  During  the second quarter of 2014,  we plan to consult
with regulatory authorities to determine the next  steps for rigosertib IV  in higher risk MDS.

Clinical Development of Rigosertib Oral in Lower  Risk Myelodysplastic Syndromes

We  filed an IND amendment with the FDA for  rigosertib Oral in February 2009. Based  on
Phase 1 and Phase 2 trial results with rigosertib Oral, we  believe that rigosertib has the  potential to
reduce or eliminate the transfusion needs  and  improve  the quality of life  for patients with lower risk
MDS. As median survival for these transfusion-dependent  patients is five or more  years,  frequent
transfusions are subject to risks and limitations, including iron overload, blood borne infections and
immune related reactions. We believe that  an oral therapeutic agent that  could lower  or eliminate the
need for transfusions over an extended period of time would fulfill a  significant unmet medical need
for this patient population.

We  are enrolling transfusion-dependent lower risk MDS patients in two Phase 2  trials. We

reported an updated interim analysis of  response  and safety data  from  the first Phase 2 trial, which we
refer to as the ‘‘ONTARGET’’ trial,  at  the December 2013 ASH Annual  Meeting. The ONTARGET
trial is an open-label, multi-site trial  testing the  effect of rigosertib Oral in  transfusion-dependent  lower
risk MDS patients. To be eligible for this  study, patients must have received transfusions of  at least four
units of red blood  cells during the eight weeks before randomization and  patients  can continue to
receive transfusions and erythroid stimulating agents while in the trial.  The primary objectives of this
trial are to evaluate efficacy, as measured by transfusion independence, as well as safety.

Patients enrolled in the ONTARGET  study received rigosertib Oral administered initially as

560 mg given two times daily (BID) for  three weeks  uninterrupted, later amended  to  560 mg BID given
intermittently (two weeks on and one  week off), and then further reduced to 560  mg AM/280 mg  PM
given intermittently. The enrollment  of  57 patients from  five  clinical  sites was completed  on

9

November 5, 2013. Updated interim  results from 36 evaluable patients in  the intermittent arm and nine
patients from the uninterrupted arm were reported  as a poster presentation  during  the ASH Annual
Meeting in New Orleans in December  2013.

Evaluation of the data indicated that rigosertib  Oral was generally well tolerated,  with the most
frequently observed drug-related side effects  being  urologic in  nature and believed to be related to the
dosing regimen. In the uninterrupted  dosing arm  of the study, six of the  first  nine patients  experienced
drug-related urinary side effects of Grade 2  or higher, meaning that they were  more than mild  in
toxicity. Accordingly, the study protocol  was amended to allow all patients to be treated with the
intermittent dosing regimen. Urinary adverse  events of grade 2+  were reported in 19 of 35 patients in
the 560 mg BID intermittent dosing.  Only  one of 13 patients (8%) reported a Grade 2+ urinary event
in the 560 mg AM/280 mg PM intermittent BID dosing.

Other adverse events of Grade 2 or higher reported in the  study  included  intermittent  neutropenia,

or an abnormally low number of white  blood cells that serve  as the primary defense against infections,
which  occurred at Grade 3 in one patient  and at  Grade  4 in one  other patient.  Renal function  was
unaffected and gastrointestinal adverse events and fatigue were  infrequently observed. Median  duration
of the treatment in the uninterrupted  dosing arm was 23 weeks. Because  the  trial  is ongoing, median
duration of the treatment in the intermittent dosing (560 mg BID and 560 mg AM/280  mg PM) arm
has not yet been determined. Initial  response results showed  that 14 of the  36 evaluable patients in  the
intermittent dosing arm and two of the eight  evaluable patients in  the uninterrupted dosing  arm
achieved transfusion independence, defined as a period of at least eight consecutive weeks without  any
red  blood cell transfusions. As shown  in  the figure  below,  in the 14  patients  who achieved  transfusion
independence in the intermittent dosing arm, the  duration of transfusion  independence ranged  from
eight weeks to more than 70 weeks.

Updated Interim Analysis of Transfusion-Dependent  Lower  Risk  MDS  Patients Treated with
Rigosertib Oral in the Intermittent Dosing Arm

Transfusion Independence (14 of 36 Evaluable Patients)*

D

I

t
n
e

i
t
a
P

01-01

01-20

01-35

01-25

01-14

01-23

01-27

01-39

01-37

01-02

01-34

01-45

01-41

01-10

Transfusion Independence in 14 /36 (39%)
evaluable patients (8 weeks+ treatment) with
intermittent 560 mg bid

0

10

20

30

40

50

60

Duration of Transfusion Independence (weeks)

80

70
18MAR201405203650

(cid:127) Horizontal arrows indicate patients  who  continued to meet the criteria for transfusion

independence at the time this data analysis was conducted. Transfusion independence is  defined
as a minimum of 8 consecutive weeks without red blood  cell transfusions.

10

 
One  of the aims of the ONTARGET  trial  was to correlate patient  characteristics with transfusion

response, thus potentially allowing for the  selection of appropriate patients for future trials with
rigosertib. To this end, a genomic scan  for methylation  was employed to analyze  for correlations  in
response to rigosertib. A signature comprising 50 loci  was identified, which  related transfusion
independence with methylation profile  in  32 patients.  A confirmation cohort  of  20 additional  patients is
now being enrolled to further explore this  potential prognostic tool.

We  initiated a second multi-center Phase 2 trial  in May  2013 in  transfusion-dependent  lower risk
MDS patients who have failed treatment with  ESAs, in  which all  patients  will receive the intermittent
dosing schedule. We expect to complete enrollment for this trial in the  second  half of 2014.

Previously, we conducted a Phase 1 trial of rigosertib Oral to determine drug safety  and tolerability

and to monitor plasma levels of rigosertib  Oral in Low, Intermediate-1, Intermediate-2 and  High-Risk
MDS patients who had failed prior azacitidine, decitabine or lenalidomide therapy or injection of an
ESA. Pharmacokinetic analysis showed that plasma levels of rigosertib could be achieved  that  were at
or above levels predicted to be pharmacodynamically  active. Encouraging preliminary  signs of activity
were observed. Safety data are available  in 33 patients from this trial. The most frequent  drug-related
adverse events, occurring in at least 10%  of patients, were decreased appetite, diarrhea, nausea  and
dysuria.  Drug-related adverse events  that were  Grade  3 or greater in  severity occurred in two  patients
and included urinary tract infection, syncope, or fainting, and dyspnea, or shortness of breath.
Hematuria was identified as the most frequent dose-limiting toxicity,  occurring  in two  patients.

Clinical Development of Rigosertib Oral in Head  and Neck  Cancers

According to the National Cancer Institute, head  and neck  cancers  accounts for approximately  3%
of all new cancer cases in the United States,  with approximately  52,000 cases  diagnosed in 2012.  Single-
modality treatment with surgery or radiation  is generally recommended for the 30% to 40% of patients
with early-stage disease. Combined modality therapy with  surgery, radiation or concurrent
chemotherapy and radiation is utilized for patients with  locally  or regionally advanced disease. Patients
with very advanced or recurrent disease are treated with  platinum-based chemotherapy, cetuximab
(Erbitux(cid:3)) or both in combination. Expected overall survival in  patients with head and neck  cancers
who have failed platinum-based therapy is about six months.

We filed an IND amendment with the FDA for  rigosertib in head and neck cancer in  November

2012. We conducted a Phase 1 trial with rigosertib Oral in 48  patients with various  advanced solid
tumors refractory to standard therapy, including  six patients with head  and neck cancers  who had
previously failed on platinum-based therapy. Two of  these  six head and neck cancers patients achieved
durable  responses to rigosertib therapy. One patient had a confirmed  complete response, defined as the
disappearance of chest and lung disease, and the other patient had a partial  response,  with a 53%
decrease of liver metastasis. Both patients  remained on therapy  for an extended period of time, over
98 weeks for one and over 48 weeks for the  other.

Rigosertib Oral is currently in a Phase  2 trial in relapsed or metastatic  squamous cell carcinoma,

with a focus on enrolling patients with head  and neck cancers. The study  will evaluate both human
papilloma virus, or HPV, positive and HPV negative groups  of patients. HPV infection presents a
significant new therapeutic challenge in  head and neck cancer  patients. Enrollment of patients in  the
first phase of the trial has been completed, and next  steps  will be determined  in this indication  in the
second quarter of 2014.

11

Briciclib—Targeted Anti-cancer Agent Modulating Cyclin  D1

Overview

Briciclib suppresses cyclin D1 accumulation  in cancer cells. Cyclin D1 is a protein required  for
normal progression through the cell reproduction cycle, and it is over-expressed in solid tumors and
hematological diseases. We are planning  to  resume  Phase 1 development of briciclib in 2014.

Clinical Development

We  filed an IND with the FDA for briciclib in November 2008. We began a Phase 1

dose-escalation study of briciclib in patients with relapsed or refractory lymphomas and acute lymphoid
leukemia, in which we were evaluating  the safety,  pharmacokinetics and activity of  a once-weekly
intravenous infusion regimen. In the  first two complete  dose  cohorts, briciclib was readily detectible  in
plasma and had a half-life of less than  one hour.  In  2011, we suspended enrollment in our Phase 1 trial
of briciclib because enrollment of patients was  occurring too slowly  and, as a result, inventory of
briciclib clinical trial materials reached its  expiration date.  We are planning to resume Phase 1 clinical
development of briciclib in 2014 with a multi-site dose escalation study in patients with  advanced solid
tumors refractory to current therapies.

Recilisib—Acute Radiation Syndromes  Treatment

Overview

Recilisib is a small molecule with radiation protection properties.  We are  developing  recilisib  SC

and recilisib Oral to address a need for medical  countermeasures to treat the effects  of  ARS,
specifically radiation-induced cytopenia.  The DoD  provided  $10.2 million  in government  funding  to  us
pursuant to a number of programs through 2011.  All agreements  relating to the government funding of
recilisib have expired and no funding  or other obligations on the part of the DoD  remain outstanding.
Our strategy is to continue to seek support  from government agencies and to develop recilisib under
the FDA Animal Efficacy Rule.

Novel Mechanism of Action

Recilisib employs a novel mechanism  of action that involves intracellular signaling  and DNA
damage  repair pathways. In preclinical  studies, cells treated with recilisib sustained less DNA damage
upon exposure to ionizing radiation in comparison  to  untreated cells.

Clinical Development for Acute Radiation Syndromes

We  filed original INDs with the FDA  for recilisib SC  and  for  recilisib  Oral in  April 2008 and May
2011, respectively. We have completed four Phase 1 trials with recilisib, three  trials with recilisib SC  in
more than 50 healthy adults and one trial with recilisib Oral  in nine healthy adults.

(cid:127) In  these Phase 1 trials, recilisib SC  was generally well tolerated without significant  drug-related
systemic toxicity. Main adverse events  were mild,  self-limited injection site reactions, generally
subsiding in a few hours. No clinically significant trends were noted in  plasma cytokines between
recilisib and placebo-treated groups. In one study,  subjects successfully self-administered recilisib
using an auto-injector system.

(cid:127) Recilisib Oral displayed good bioavailability and was well tolerated. No  drug-related systemic
side-effects were observed. Drug concentration  and overall exposure increased more than
dose-proportionately, with corresponding decreases  in the rate of clearance of recilisib.

12

Preclinical Development for Acute Radiation Syndromes

We  have conducted preclinical studies to evaluate  the radioprotective effects of recilisib SC  and
recilisib Oral in collaboration with the Armed  Forces Radiobiology  Research Institute  and Georgetown
University. In these studies, protection  from radiation injury by recilisib was observed  when
administered prophylactically prior to  ionizing radiation exposure  in cellular and  animal models. In
irradiated mice, the protective benefits included  increased overall survival and an enhanced rate of
recovery of the hematopoietic system  and  crypt cells lining  the gut. We are also working with  the
Biomedical Advanced Research and Development  Authority on this program.

Preclinical Programs

In addition to our three clinical-stage product  candidates, we  have developed a  pipeline of
preclinical programs. Our preclinical pipeline includes six programs that  target kinases,  cellular
metabolism or division. We intend to  explore  additional collaborations to  further the development of
these product candidates as we focus internally on  our more  advanced programs.

ON 1231320—Inhibitor of Polo-like Kinase 2, or PLK2: PLK2 is critical for centriole duplication
during cell division, or mitosis. ON 1231320 is a specific inhibitor of PLK2, and in preclinical  studies, it
induced mitotic arrest and reduced tumor  burden in mice  injected subcutaneously with colon tumor
and triple-negative breast cancer cells.

ON 123300—Inhibitor of the Cell Cycle and Cancer Cell Metabolism: ON 123300 inhibits the activity

of two kinases, cyclin-dependent kinase 4,  or CDK4, and AMP-activated protein kinase  5, or ARK5.
CDK4 is an essential component of the  cell division machinery  and is a well-established target  for
therapeutic development. ARK5 is believed to be involved  in the regulation of cancer cell metabolic
activity. We believe that ON 123300 may  have promise as  a  brain tumor therapy.  We observed that ON
123300 can kill glioblastoma tumor cells  in vitro and we also observed that, in mouse  brain  tumor
models, ON 0123300 can cross the blood-brain barrier.

ON 108600—Inhibitor of Cyclin-dependent  Kinase 9 and Casein Kinase 2: ON 108600 is a dual
inhibitor of two growth-regulatory kinases.  Cyclin-dependent kinase 9 is over expressed in several
cancers, including leukemias and lymphomas. Casein kinase  2 is overexpressed in  a variety  of tumor
types and plays a role in oncogenic processes including  DNA damage and repair. We believe that
ON 108600 may invoke a novel mechanism of  cancer  cell  lethality  by inhibiting these two targets.

ON 044580—Non-ATP Dual Inhibitor  of Janus  Kinase 2,  or JAK-2, and Bcr-Abl Kinase: ON 044580

inhibits mutant forms of the two target kinases,  including JAK2  V617F and imatinib-resistant
Bcr-Abl  T315I. Three major myeloproliferative disorders,  a group of diseases  of the bone marrow in
which  excess cells are produced, are polythycemia  vera, essential thrombocythemia and myeloid
metaplasia with myelofibrosis. These  disorders harbor mutations in JAK2, making this enzyme a
potentially attractive therapeutic target for treating these disorders.  Philadelphia  chromosome-positive
chronic myeloid leukemia cells make  an abnormal protein  called Bcr-Abl kinase, which is the  clinical
target of the approved inhibitor, imatinib  (Gleevec(cid:3)).

ON 24 Series of Compounds—Oral Anti-Tubulin Agents: Microtubules are organelles composed of a
protein known as tubulin that help maintain cell shape,  assist  in cell movement and guide cell division.
Interference with microtubule formation is an  established anti-cancer  strategy. ON  24 compounds  cause
tubulin to depolymerize, inducing mitotic arrest  in cultured tumor  cell  lines.

ON 146 Series—Selective Inhibitors of PI3K alpha/delta Isoforms: Gain-of-function mutations in
alpha and delta isoforms of PI3K are  critical  drivers of growth  in several  cancers. ON 146040  inhibits
the growth of a variety of blood cancer cell lines,  including Burkitt’s  lymphoma,  MCL, multiple
myeloma and chronic myeloid leukemia.

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Our Proprietary Drug Discovery Platform

Our product candidates, designed for  targeting cancer while  protecting healthy  cells,  are derived

from a novel chemistry platform and cell-based differential screening, which  together  define our
discovery  approach. Our chemical library  contains more than 150 novel core chemical structures and
thousands of unique compounds. Most are simple two- or  three-ring  structures that are  built around a
common core or signature element. Most  kinase enzymes require  the binding of adenosine
triphosphate, or ATP, to function. Unlike most kinase  inhibitors, our  proprietary library includes many
molecules that do not compete with the ATP binding site of kinases, which  we believe  may provide a
more selective way to inhibit these enzymes.

Research and Development

Since commencing operations, we have dedicated  a significant  portion of  our resources to the
development of our clinical-stage product  candidates, particularly rigosertib. We incurred research and
development expenses of $50.2 million, $52.8 million, and $22.6  million during the  years  ended
December 31, 2013, 2012 and 2011, respectively. We anticipate that  a significant portion of our
operating expenses will continue to be related to research and development as  we continue  to  advance
our  clinical-stage product candidates.

Collaborations

Baxter Healthcare SA

In September 2012, we entered into a  development and license agreement with a  subsidiary  of
Baxter International Inc., Baxter Healthcare SA, or Baxter, granting Baxter an  exclusive,  royalty-bearing
license for the research, development, commercialization and manufacture  (in  specified instances) of
rigosertib in all therapeutic indications  in  Europe. Under  the Baxter  agreement, we  are obligated to use
commercially reasonable efforts, in accordance with a development  plan agreed  upon by the  parties, to
direct, coordinate and manage the development of rigosertib for MDS  and pancreatic cancer. In
addition, there is a specified mechanism  set  forth in the agreement to expand  the scope of the
collaboration for additional indications.  Our agreement with Baxter is guided by a joint steering
committee. If the joint steering committee is  not  able  to  make a decision by consensus, then  any
dispute would be resolved by specified executive officers of both parties.

Under the terms of the agreement, Baxter made  an upfront payment of $50.0  million. We are

eligible to receive pre-commercial milestone payments of up to an aggregate of $337.5  million if
specified development and regulatory  milestones are  achieved. The potential pre-commercial
development milestone payments to us include the  following:

(cid:127) $50.0 million for achievement of the primary endpoint of a Phase 3 clinical  trial  for rigosertib IV
in higher risk MDS patients (the ‘‘MDS IV indication’’)  or mutual agreement of  the Parties to
file for any marketing approval in either the European Union  as a whole or in  all  of the Big
Five EU Countries;

(cid:127) $25.0 million for the joint decision to proceed  with the  development of rigosertib for  lower risk

MDS; and

(cid:127) $25.0 million for each drug approval  application  filed for indications specified in  the

arrangement with Baxter.

We  may also receive up to $212.5 million in milestone  payments for regulatory approvals of the

rigosertib MDS indications specified  in the  arrangement with Baxter,  each of which  may be up to and
in excess of $100.0 million. We are also  potentially  eligible to receive an additional $20.0 million
pre-commercial milestone payment related to the timing of regulatory  approval  of rigosertib IV in

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higher  risk MDS patients in Europe.  In  addition to these pre-commercial milestones, we are eligible  to
receive up to an aggregate of $250.0  million  in milestone payments  based on Baxter’s achievement of
pre-specified threshold levels of annual  net sales of rigosertib.  We are also  entitled to receive  royalties
at percentage rates ranging from the  low-teens to the low-twenties on net sales of rigosertib by Baxter
in the licensed territory.

Under the agreement, Baxter is obligated to pay  us  royalties, on  a country-by-country basis  in the

licensed territory, until the later of the expiration  of all valid claims of  the  patent  rights licensed to
Baxter that cover the manufacture, use,  sale or  importation  of  rigosertib in such country, and  the
expiration of regulatory-based exclusivity  for rigosertib in  such country. If  the patent rights and
regulatory-based exclusivity expire in a  particular country before a specified period  of  time after  first
commercial sale of rigosertib in that country, Baxter will pay us royalties at  a reduced rate  until the
end of the specified period. In addition,  unless  we receive marketing approval for the use of
rigosertib IV for MDS from the EMA  or  specified  European  Union countries without undertaking
additional specified clinical-trials, the royalty  rates may be reduced  depending on when  we receive
marketing approval for the use of rigosertib IV for MDS from  the EMA  or specified European Union
countries, and whether or not a competing  product for refractory  MDS has been approved  within a
specified period after our receipt of approval for rigosertib  IV for MDS.

The agreement with Baxter will remain in  effect until the expiration of  all applicable royalty  terms
and satisfaction of all payment obligations  in each licensed  country,  unless terminated earlier due to the
uncured material breach or bankruptcy of a party, force majeure, or in the event of a  specified
commercial failure. We may terminate the agreement  in the event  that Baxter brings  a challenge
against us in relation to the licensed patents. Baxter may terminate the agreement without cause
commencing after a specified period  of  time from the  execution  of  the agreement.

In July 2012, Baxter purchased $50.0  million of our Series  J convertible preferred stock,  which
converted to shares of Common Stock  immediately prior to the  consummation  of our  IPO. Baxter also
invested $5.0 million in our initial public  offering in July  2013.

SymBio Pharmaceuticals Limited

In July 2011, we entered into a license  agreement with  SymBio Pharmaceuticals Limited, or
SymBio, as subsequently amended, granting SymBio an  exclusive,  royalty-bearing license  for the
development and commercialization of rigosertib in Japan and Korea.  Under  the SymBio license
agreement, SymBio is obligated to use  commercially reasonable efforts to develop and obtain market
approval for rigosertib inside the licensed territory and we  have similar obligations  outside of  the
licensed territory. We have also entered  into an agreement with SymBio to supply them  with
development-stage product. Under the  SymBio license  agreement we also agreed  to  supply commercial
product  to SymBio under specified terms  that will  be  included in  a  commercial supply  agreement to be
negotiated prior to the first commercial sale of  rigosertib. We  have also granted SymBio a right  of first
negotiation to license or obtain the rights  to  develop  and  commercialize  compounds having a chemical
structure similar to rigosertib in the licensed  territory.

Under the terms of the SymBio license  agreement, we  received an upfront payment of

$7.5 million. We are eligible to receive  milestone payments of up to an aggregate of $22.0  million from
SymBio upon the achievement of specified  development and regulatory milestones for specified
indications. Of the regulatory milestones,  $5.0 million is due  upon receipt  of  marketing  approval in the
United States of rigosertib IV in higher risk  MDS patients, $3.0  million is  due  upon receipt  of
marketing approval in Japan for rigosertib IV  in higher risk MDS patients, $5.0 million is  due  upon
receipt of marketing approval in the  United  States for  rigosertib Oral  in lower risk MDS patients,
$5.0 million is due upon receipt of marketing  approval in Japan  for rigosertib Oral in  lower risk  MDS
patients. Furthermore, upon receipt of marketing approval in the United  States  and Japan for an

15

additional specified indication of rigosertib,  which we are  currently not  pursuing, an  aggregate  of
$4.0 million would be due. In addition to these pre-commercial milestones, we are eligible to receive
tiered milestone payments of up to an  aggregate of $30.0  million based  upon  annual net sales of
rigosertib by SymBio in the licensed territory. Further, under  the terms  of  the SymBio license
agreement, SymBio is obligated to make royalty  payments to us at  percentage  rates ranging from  the
mid-teens to 20% based on net sales  of rigosertib by SymBio  in the licensed  territory.

Royalties will be payable under the SymBio agreement  on a country-by-country  basis in  the

licensed territory, until the later of the expiration  of marketing exclusivity in  those countries,  a specified
period of time after first commercial  sale of rigosertib in such country, or the  expiration of all valid
claims of the licensed patents covering  rigosertib or  the manufacture or  use of rigosertib in  such
country. If no valid claim exists covering the  composition  of matter of rigosertib  or the use of or
treatment with rigosertib in a particular country before the expiration of the royalty term, and specified
competing products achieve a specified market share  percentage in  such country, SymBio’s obligation  to
pay us royalties will continue at a reduced royalty rate until the  end  of the royalty  term. In addition,
the applicable royalties payable to us may  be reduced if SymBio  is required to pay royalties  to  third
parties for licenses to intellectual property  rights necessary to develop, use,  manufacture or
commercialize rigosertib in the licensed territory.

The license agreement with SymBio will remain in  effect until the expiration of the royalty term.

However, the SymBio license agreement may be terminated  earlier due to the uncured material breach
or bankruptcy of a party, or force majeure. If SymBio terminates the  license agreement  in these
circumstances, its licenses to rigosertib  will survive, subject  to  SymBio’s milestone  and royalty
obligations, which SymBio may elect  to  defer and offset against any damages that may be determined
to be due from us. In addition, we may  terminate the license  agreement in  the event that SymBio
brings a challenge against us in relation to the licensed patents, and SymBio may terminate the license
agreement without cause by providing us  with written notice a  specified period of time in  advance  of
termination.

The Leukemia and Lymphoma Society

In May 2010, we entered into a funding agreement  with The Leukemia and  Lymphoma Society, or
LLS, to fund  the development of rigosertib. Under the LLS funding agreement,  we are  obligated to use
the funding received exclusively for the payment or reimbursement  of the costs  and expenses for
clinical development activities for rigosertib. Under this agreement, we  retain  ownership and  control  of
all intellectual property pertaining to works  of authorship, inventions,  know-how,  information, data and
proprietary material.

Under the LLS funding agreement, as amended, we  received funding  of $8.0 million from LLS

through 2012. We did not receive any  funding from  LLS in  2013 and we terminated the funding
agreement effective as of March 2013.  We are  required to make specified payments to LLS, including
payments payable upon execution of the  first out-license; first approval for marketing  by  a regulatory
body; completion of the first commercial sale of  rigosertib; and  achieving  specified annual  net sales
levels of rigosertib. The extent of these payments  and  our obligations will  depend  on whether we
out-license rights to develop or commercialize  rigosertib  to a third party, we commercialize rigosertib
on our own or we combine with or are  sold to another company. In  addition, we will pay to LLS a
single-digit percentage royalty of our  net  sales of  rigosertib, if  any.  The  sum of our payments to LLS is
capped  at three times the total funding  received  from LLS, or $24.0 million.

In addition, some of our obligations  under the funding  agreement will  remain in effect until  the

completion of specified milestones and payments to LLS.  Assuming the  successful outcome  of  the
development activities covered by the LLS funding agreement  and  our receipt  of  necessary  regulatory
approvals, we will be required to take  commercially reasonable steps through March  2018 to advance

16

the development of rigosertib in clinical  trials and to bring rigosertib to practical application for MDS
in a major market country, provided that  we  reasonably believe  the  product is  safe and effective. We
believe that we can satisfy our obligation by out-licensing  rigosertib to, or partnering rigosertib with, a
third party. We are required to report to LLS on  our efforts and results with respect to continuing
development of rigosertib. Our failure to perform these diligence obligations,  even if we successfully
achieve the specified development milestones, would require us to pay back  to  LLS the total  amount of
the funding we received from them, unless an  exception  applies. If LLS were to claim that such  failure
occurred and we disagreed with such claim, the  dispute  would  be  settled through  binding  arbitration.

Preclinical Collaboration

In December 2012, we formed GBO, LLC,  or GBO, an  entity jointly-owned by both us and GVK

Biosciences Private Limited, or GVK, to collaborate on the development of two of our preclinical
programs. GVK made an initial capital  contribution of $500,000  in exchange  for a  10% interest in
GBO and we contributed a sub-license  to  the intellectual property related to the two programs in
exchange for a 90% interest. GVK will  be  required  to  make additional capital contributions over time,
subject to specified conditions, and its  interest in GBO will increase to as  much  as 50%. At  specified
times, we will be entitled to buy back from  GVK  the rights to either of these two programs.

Intellectual Property

Patents and Proprietary Rights

Our intellectual property is derived through  our  internal research,  licensing agreements with
Temple University, or Temple, and licensing research agreements  with the  Mount Sinai School  of
Medicine, or Mount Sinai.

License Agreement with Temple University

In January 1999, we entered into a license agreement  with Temple  as subsequently amended,  to
obtain an exclusive, world-wide license  to  certain Temple patents  and technical information  to  make,
have made, use, sell, offer for sale and  import several classes  of novel  compounds, including  our three
clinical-stage product candidates, rigosertib, briciclib and  recilisib.

Under the terms of the license agreement, we  paid  Temple a non-refundable up-front payment,
and are required to pay annual license  maintenance fees, as well as a low  single-digit percentage  of net
sales as a royalty. In addition, we agreed to pay  Temple  25% of any consideration received from any
sublicensee of the licensed Temple patents  and technical information, which  does not include  any
royalties on sales, funds received for  research  and  development or proceeds from any equity or debt
investment.

The license agreement with Temple can be terminated by mutual agreement or due to the material
breach or bankruptcy of either party. We  may terminate the license agreement for  any reason by giving
Temple prior written notice.

Research Agreement with Mount Sinai School of Medicine

In May 2010, we entered into a research agreement  with Mount Sinai.  This  agreement is described

in more detail under the caption ‘‘Certain Relationships and Related Party Transactions—Research
Agreement.’’

Rigosertib Patents

As of May 6, 2013, we owned or exclusively  licensed 64 issued patents  and 18  pending patent

applications covering composition-of-matter, process, formulation and various  indications for

17

method-of-use for rigosertib filed worldwide, including five patents and three patent applications  in the
United States. The U.S. composition-of-matter  patent for  rigosertib, which we in-licensed pursuant to
the license agreement with Temple, expires in  2026. The U.S.  method of treatment patent for
rigosertib, which we also in-licensed from  Temple, expires  in 2025.

Briciclib Patents

As of May 6, 2013, we owned or exclusively  licensed eight issued patents and five pending patent

applications covering composition-of-matter, process, formulation and various  indications for
method-of-use for briciclib filed worldwide, including one patent in the  United States. The  U.S.
composition-of-matter patent for briciclib expires in 2025.

Recilisib Patents

As of May 6, 2013, we owned or exclusively  licensed 43 issued patents  and 38  pending patent
applications covering composition of  matter, formulation and various indications for method-of-use for
recilisib filed worldwide, including four  patents  and  five  patent  applications  in the United States. The
U.S. composition-of-matter patent for  recilisib  expires in 2020.

General Considerations

As with other biotechnology and pharmaceutical  companies, our ability to maintain and solidify a

proprietary position for our product candidates will depend upon  our success in  obtaining  effective
patent claims and enforcing those claims once granted.

Our commercial success will depend in part upon  not  infringing upon the proprietary rights of
third parties. It is uncertain whether the  issuance of any third-party  patent  would require us to alter
our  development or commercial strategies, or our  product candidates  or  processes, obtain licenses or
cease certain activities. The biotechnology  and pharmaceutical  industries are characterized by extensive
litigation regarding patents and other  intellectual property rights. If a third  party commences a  patent
infringement action against us, or our collaborators,  it could  consume significant  financial  and
management resources, regardless of  the merit of the  claims or the outcome  of  the litigation.

The term of a patent that covers an FDA-approved  drug  may  be  eligible  for additional patent term

extension, which provides patent term  restoration as compensation for the patent term  lost  during the
FDA regulatory review process. The  Drug Price Competition and Patent Term  Restoration Act of 1984,
or the Hatch-Waxman Act, permits a patent term  extension of up  to  five  years  beyond the expiration of
the patent. The length of the patent  term extension is related  to  the length of time the drug is  under
regulatory review.  Patent extension cannot extend the  remaining  term of a  patent  beyond a total of
14 years from the date of product approval  and only one  patent  applicable to an  approved drug may  be
extended. Similar provisions are available  in Europe and other  foreign jurisdictions to extend  the term
of a patent that covers an approved drug.  In the future, if and when our  pharmaceutical products
receive FDA approval, we expect to apply for patent term extensions on patents covering those
products.

Furthermore, we may be able to obtain extension of patent  term by adjustment of the  said term
under the provisions of 35 U.S.C. § 154 if the issue of an original patent  is delayed due to the failure
of the U.S. Patent and Trademark Office. For example,  we have  received  adjustments of 1,139 days
extension to the patent term for the rigosertib composition of matter  patent  (US 7,598,232), 1,155 days
extension for the patent covering the process for  making rigosertib (US 8,143,453)  and 751 days
extension for rigosertib formulation patent (US  8,063,109)  under the  provisions of  35 U.S.C. §154.

18

Many pharmaceutical companies, biotechnology  companies  and academic institutions  are
competing with us in the field of oncology  and  filing patent applications  potentially relevant to our
business. Even when a third party patent  is identified, we  may  conclude upon a thorough analysis,  that
we do not infringe upon the patent or  that the patent is invalid. If  the third-party patent owner
disagrees with our conclusion and we continue with  the business  activity in  question, we may  be  subject
to patent litigation. Alternatively, we  might decide to initiate litigation  in an attempt to have a  court
declare the third-party patent invalid  or  non-infringed by our activity. In either  scenario, patent
litigation typically is costly and time-consuming, and the outcome can be favorable  or unfavorable.

In addition to patents, we rely upon  unpatented trade  secrets, know-how  and continuing
technological innovation to develop and  maintain  a competitive position. We seek  to  protect our
proprietary information, in part, through confidentiality agreements  with our employees, collaborators,
contractors and consultants, and invention assignment agreements with our employees. We also have
agreements requiring assignment of inventions with  selected  consultants and collaborators.  The
confidentiality agreements are designed to protect  our  proprietary information and, in  the case of
agreements or clauses requiring invention  assignment, to grant us  ownership  of  technologies that are
developed through a relationship with  a  third party.

Competition

The pharmaceutical industry is highly  competitive and subject to rapid and significant  technological

change. While we believe that our development experience and scientific  knowledge provide us with
competitive advantages, we face competition from both large  and small pharmaceutical and
biotechnology companies. There are a number of pharmaceutical companies, biotechnology companies,
public and private universities and research organizations actively engaged  in the research and
development of products that may compete with our products. Many  of  these companies are
multinational pharmaceutical or biotechnology organizations, which are pursuing the development of,
or are currently marketing, pharmaceuticals that target the key oncology indications  or cellular
pathways on which we are focused.

It  is probable that the increasing incidence  and prevalence of  cancer will  lead  to  many more
companies seeking to develop products and therapies  for the  treatment of unmet needs in oncology.
Many of our competitors have significantly greater financial, technical  and human  resources  than we
have. Many of our competitors also have a significant advantage with respect to experience in  the
discovery  and development of product  candidates,  as well  as  obtaining FDA and  other regulatory
approvals of products and the commercialization  of  those products. We anticipate  intense and
increasing competition as new drugs  enter  the market and as more advanced technologies become
available. Our success will be based in part on our ability to identify,  develop  and manage  a portfolio
of drugs that are safer and more effective  than competing  products in  the treatment of cancer  patients.

Myelodysplastic Syndromes

There are several ongoing clinical trials aimed at expanding the use of approved chemotherapeutic

and immunomodulatory agents in higher  risk MDS, as well as several new  clinical programs testing
novel technologies in this area. Companies competing in this space include Eisai Inc.  (decitabine),
Celgene Corporation (azacitidine in combination with lenalidomide  or vorinostat (Zolinza(cid:3)), Cell
Therapeutics, Inc. (tosedostat in combination with decitabine  or cytarabine), Cyclacel
Pharmaceuticals, Inc. (sapacitabine), Mirati  Therapeutics (mocetinostat in combination with
azacitidine), and MEI Pharma (pacrinostat in combination  with azacitidine).  To our knowledge,  there
are no Phase 3 trials other than our  trial  for rigosertib IV being conducted for higher risk MDS
patients who have  failed treatment with hypomethylating agents. In the lower  risk MDS  market, we
face competition from a number of companies in mid-stage clinical trials, such as Celgene  Corporation
(lenalidomide), Array BioPharma Inc (ARRY-614), and Acceleron Pharma (sotatercept and ACE-536).

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Acute Radiation Syndrome

Competitors developing products to  address ARS include Soligenix, Inc., Cellerant

Therapeutics, Inc., and Cleveland BioLabs,  Inc. Each  of  these companies is  working with  the U.S.
government to develop its products through federal contracts and grants.

Manufacturing

Our product candidates are synthetic small molecules. Manufacturing  activities must comply  with

FDA current good manufacturing practices, or cGMP,  regulations. We conduct our manufacturing
activities under individual purchase orders with  third-party contract manufacturers, or CMOs. We have
in place quality agreements with our key CMOs and  are negotiating supply  agreements with them. We
have also established an internal quality management organization, which audits and  qualifies  CMOs  in
the United States and abroad.

We  are working with CMOs to produce  the rigosertib active pharmaceutical ingredient,  which we

believe will enable us to launch and  commercialize  rigosertib IV if and when marketing approval is
obtained. Other CMOs produce rigosertib IV  and rigosertib Oral  for use in our clinical trials. We
believe that the manufacturing processes for  the active pharmaceutical  ingredient and  finished  drug
products for rigosertib have been developed to adequately support future development and commercial
demands.

The FDA regulates and inspects equipment, facilities and  processes used in manufacturing
pharmaceutical products prior to approval. If we fail to comply with  applicable  cGMP requirements
and conditions of product approval, the  FDA may  seek sanctions, including fines, civil  penalties,
injunctions, suspension of manufacturing operations, operating restrictions, withdrawal of FDA
approval, seizure or recall of products  and criminal  prosecution.  Although we periodically monitor  the
FDA compliance of our third-party CMOs, we cannot be certain  that our  present  or future  third-party
CMOs will consistently comply with cGMP and other applicable FDA regulatory requirements.

Commercial Operations

We  do not currently have an organization for the sales, marketing and distribution of
pharmaceutical products. We may rely on  licensing and co-promotion agreements  with strategic
partners for the commercialization of  our products in the  United States and other territories.  If we
choose to build a commercial infrastructure to support  marketing  in the United States, such
commercial infrastructure could be expected to include  a targeted, oncology sales force supported by
sales management, internal sales support,  an internal marketing group and distribution  support. To
develop the appropriate commercial  infrastructure internally, we would have to invest financial and
management resources, some of which would have  to  be  deployed prior to any confirmation that
rigosertib will be approved.

Government Regulation

As a pharmaceutical company that operates in the United States, we are subject  to  extensive
regulation by the FDA, and other federal, state,  and  local regulatory agencies. The Federal Food,  Drug,
and Cosmetic Act, or the FDC Act, and its implementing regulations  set forth, among other things,
requirements for the research, testing, development,  manufacture, quality  control, safety, effectiveness,
approval, labeling, storage, record keeping,  reporting, distribution, import, export, advertising  and
promotion of our products. Although  the  discussion below  focuses  on regulation  in the United States,
we anticipate seeking approval for, and marketing of, our products  in other countries. Generally,  our
activities in other countries will be subject  to  regulation that is  similar in nature and  scope  as that
imposed in the United States, although  there  can be important differences.  Additionally, some
significant aspects  of regulation in Europe  are addressed  in a  centralized  way  through the EMA,  but

20

country-specific regulation remains essential in  many  respects. The process of obtaining regulatory
marketing approvals and the subsequent compliance with  appropriate federal,  state, local and  foreign
statutes and regulations require the expenditure of substantial  time  and  financial resources.

United States Government Regulation

The FDA is the main regulatory body  that controls pharmaceuticals in  the United States,  and its
regulatory authority is based in the FDC Act. Pharmaceutical products are  also subject  to  other  federal,
state and local statutes. A failure to comply  explicitly with  any  requirements during the product
development, approval, or post-approval  periods,  may lead to administrative or judicial  sanctions. These
sanctions could include the imposition by the FDA or an  institutional  review board, or IRB, of a hold
on clinical trials, refusal to approve pending marketing applications or supplements, withdrawal of
approval, warning letters, product recalls, product seizures, total or partial suspension  of  production  or
distribution, injunctions, fines, civil penalties or criminal prosecution.

The steps required before a new drug  may  be  marketed in the United  States generally include:

(cid:127) Completion of preclinical laboratory tests, animal studies  and formulation studies  in compliance

with the FDA’s GLP regulations;

(cid:127) Submission to the FDA of an IND  to  support human clinical testing;

(cid:127) Approval by an IRB at each clinical site before each  trial may be initiated;

(cid:127) Performance of adequate and well-controlled  clinical trials  in accordance with federal  regulations

and with current good clinical practices, or GCPs, to establish  the safety and efficacy of the
investigational drug product for each  targeted indication;

(cid:127) Submission of an NDA to the FDA;

(cid:127) Satisfactory completion of an FDA Advisory Committee review, if applicable;

(cid:127) Satisfactory completion of an FDA inspection of  the manufacturing facilities at  which the

investigational product is produced to assess compliance with cGMP,  and to  assure that the
facilities, methods and controls are adequate; and

(cid:127) FDA review and approval of the NDA.

Clinical Trials

An IND is a request for authorization  from the FDA to administer  an investigational drug product
to humans. This authorization is required  before  interstate  shipping and administration of any new drug
product  to humans that is not the subject  of an  approved NDA.  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 drug  to
patients under the supervision of qualified investigators following GCPs, an international standard
meant to protect the rights and health of patients  and  to  define the roles of clinical trial sponsors,
administrators and monitors. Clinical  trials are conducted under  protocols  that  detail the parameters  to
be used in monitoring safety, and the efficacy 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 informed written consent of  each participating subject is required.  The  clinical investigation
of an investigational drug is generally  divided into three phases. Although the  phases are  usually

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conducted sequentially, they may overlap  or be combined.  The  three phases of  an investigation are  as
follows:

(cid:127) Phase 1. Phase 1 includes the initial  introduction of  an investigation drug into humans. Phase 1

clinical trials may be conducted in patients with the target disease or condition  or healthy
volunteers. These studies are designed to evaluate the safety,  metabolism, pharmacokinetics and
pharmacologic actions of the investigational drug in humans,  the side  effects associated with
increasing doses, and if possible, to  gain early evidence on effectiveness. During Phase 1 clinical
trials, sufficient information about the investigational product’s pharmacokinetics  and
pharmacological effects may be obtained to permit  the design of Phase 2  clinical trials.  The  total
number of participants included in Phase 1  clinical  trials varies, but is  generally in the  range of
20 to 80.

(cid:127) Phase 2. Phase 2 includes the controlled clinical trials conducted to evaluate the  effectiveness

of the investigational product for a particular  indication(s)  in patients with the disease or
condition under study, to determine dosage tolerance and optimal  dosage, and to identify
possible adverse side effects and safety risks associated with the drug. Phase 2 clinical trials are
typically well-controlled, closely monitored,  and conducted in  a  limited  patient population,
usually involving no more than several hundred participants.

(cid:127) Phase 3. Phase 3 clinical trials are controlled clinical trials conducted  in an expanded patient
population at geographically dispersed clinical trial sites.  They are performed  after preliminary
evidence suggesting effectiveness of the investigational  product has  been obtained, and are
intended to further evaluate dosage, clinical effectiveness and  safety, to establish the  overall
benefit-risk relationship of the product, and to provide an adequate basis for product approval.
Phase 3 clinical trials usually involve  several hundred to several thousand participants. 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 trial with other confirmatory evidence  may be
sufficient in rare instances where the  study 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 a  potentially serious outcome
and confirmation of the result in a second  trial  would be practically or ethically impossible.

The decision to terminate development of an investigational drug  product may be made by either a
health authority body, such as the FDA  or IRB/ethics committees, or by a company  for various reasons.
The FDA may order the temporary,  or permanent, discontinuation of a  clinical trial at any time,  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. In some cases,
clinical trials are overseen by an independent  group of qualified  experts organized by the trial  sponsor,
or the clinical monitoring board. This  group provides  authorization for whether or  not  a trial may move
forward at designated check points. These decisions  are based on the limited access to data from the
ongoing trial. The suspension or termination of development can occur  during any  phase of clinical
trials if it is determined that the participants or patients are being exposed  to  an unacceptable health
risk. In addition, there are requirements for  the registration of ongoing clinical trials of  drugs on public
registries and the disclosure of certain  information  pertaining to the trials  as well as  clinical trial  results
after completion.

A sponsor may be  able to request an  SPA,  the purpose of  which is  to  reach agreement with the
FDA on the Phase 3 clinical trial protocol  design and analysis that  will form the primary basis of an
efficacy claim. A sponsor meeting the regulatory  criteria may make a specific  request for  an SPA and
provide information regarding the design  and size of the proposed  clinical trial. An SPA request must
be made before the proposed trial begins, and all open issues must  be  resolved  before  the trial begins.
If a  written agreement is reached, it will be documented and  made  part  of  the record. The agreement

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will be binding on the FDA and may  not  be  changed by the  sponsor  or the FDA after the trial  begins
except with the written agreement of the  sponsor and the FDA or if  the FDA determines that a
substantial scientific issue essential to  determining the safety or efficacy of the product candidate was
identified after the testing began. An  SPA  is not binding if new circumstances arise, and there  is no
guarantee that a study will ultimately be adequate  to  support an approval  even if the  study is  subject to
an SPA. Rigosertib is being tested in several advanced stage clinical trials, including  a pivotal  Phase 3
trial under an SPA. Having an SPA agreement does  not  guarantee  that a product  will receive FDA
approval.

Assuming successful completion of all required testing  in accordance with all applicable  regulatory
requirements, detailed investigational  drug product  information  is submitted  to  the FDA in the  form of
a NDA to request market approval for the  product in  specified indications.

New Drug Applications

In order to obtain approval to market a drug  in the United States, a marketing application must

be submitted to the FDA that provides  data establishing the  safety and effectiveness  of the drug
product  for the proposed indication.  The application includes all relevant data available from pertinent
preclinical and clinical trials, including negative  or ambiguous results as  well as positive findings,
together with detailed information relating to the  product’s chemistry,  manufacturing, controls  and
proposed labeling, among other things. Data can  come  from company-sponsored  clinical trials  intended
to test the safety and effectiveness of a  product, or from a  number  of alternative  sources,  including
studies initiated by investigators. To support  marketing  approval, the data submitted must be sufficient
in quality and quantity to establish the  safety and effectiveness of the  investigational  drug product to
the satisfaction of the FDA.

In most cases, the NDA must be accompanied by a substantial user fee (currently exceeding
$1,958,000); there may be some instances  in  which the  user fee is waived. The FDA  will initially review
the NDA for completeness before it accepts the NDA for filing. 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.  After the NDA
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. Most such  applications for standard review drug products
are reviewed within ten to twelve months. The FDA  can extend this review by three months to consider
certain late-submitted information or information intended to clarify  information  already  provided in
the submission. The FDA reviews the  NDA to determine, among other things, whether the proposed
product  is safe and effective for its intended  use, and whether the  product is  being  manufactured in
accordance with cGMP. The FDA may  refer applications for novel  drug products which  present  difficult
questions of safety or efficacy to an advisory committee, typically a panel that includes  clinicians  and
other experts, for review, evaluation and a  recommendation as  to  whether the application should be
approved and under what conditions. The  FDA  is not bound by the recommendations of an advisory
committee, but it considers such recommendations carefully  when  making decisions.

Before approving an NDA, the FDA will inspect the facilities at which the product  is

manufactured. The FDA will not approve  the product unless it determines that the manufacturing
processes and facilities are in compliance with cGMP  requirements and adequate  to  assure consistent
production of the product within required  specifications. Additionally,  before  approving an NDA, the
FDA will typically inspect one or more  clinical sites to assure compliance with  GCP. 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

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such resubmissions in two or six months depending on the type of  information included.
Notwithstanding the submission of any  requested additional  information, the FDA ultimately may
decide that the application does not satisfy the  regulatory criteria for approval.

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 healthcare
professionals, and elements to assure safe 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  standards is not maintained
or problems are identified following initial marketing.

Changes to some of the conditions established in an  approved application, including changes in
indications, labeling, or manufacturing processes  or facilities, require submission  and FDA  approval of
a new NDA or NDA supplement before  the change can be implemented. An  NDA 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.

Advertising and Promotion

The FDA and other federal regulatory agencies closely  regulate the marketing and  promotion of

drugs through, among other things, standards  and  regulations for direct-to-consumer advertising,
communications regarding unapproved  uses,  industry-sponsored scientific and  educational activities,  and
promotional activities involving the Internet.  A product cannot be commercially promoted before it is
approved. After approval, product promotion can  include only  those claims  relating to safety  and
effectiveness that are consistent with  the labeling approved by the FDA. Healthcare providers are
permitted to prescribe drugs for ‘‘off-label’’  uses—that is, uses not approved  by  the FDA and therefore
not described in the drug’s labeling—because the FDA does  not regulate the practice of medicine.
However, FDA regulations impose stringent restrictions  on manufacturers’  communications regarding
off-label uses. Broadly speaking, a manufacturer may  not  promote  a drug for off-label  use, but may
engage in non-promotional, balanced  communication regarding off-label use under specified conditions.
Failure to comply with applicable FDA requirements and  restrictions in this area may subject  a
company to adverse publicity and enforcement action by the  FDA,  the DOJ, or the Office  of  the
Inspector General of HHS, as well as state authorities.  This  could subject  a company to a  range of
penalties that could have a significant  commercial impact,  including civil and criminal fines and
agreements that materially restrict the manner in  which a  company promotes or distributes drug
products.

Post-Approval Regulations

After regulatory approval of a drug is obtained,  a company is  required to comply  with a number of
post-approval requirements. For example, as a  condition  of  approval  of  an NDA, the  FDA may  require
post-marketing testing, including Phase  4 clinical  trials, and  surveillance to further assess and monitor
the product’s safety and effectiveness  after commercialization. Regulatory  approval of oncology
products often requires that patients in clinical trials be followed  for long periods  to  determine  the
overall survival benefit of the drug. In  addition, as a  holder of an approved NDA,  a company would  be
required to report adverse reactions and  production problems to the FDA, to provide updated  safety
and efficacy information, and to comply  with requirements concerning advertising and promotional
labeling for any of its products. Also, quality control and manufacturing procedures must continue to

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conform to cGMP after approval to assure and preserve the  long term  stability of the  drug  or biological
product.  The  FDA periodically inspects  manufacturing  facilities to assess  compliance with cGMP,  which
imposes extensive procedural and substantive  record keeping  requirements. In addition, changes to the
manufacturing process are strictly regulated,  and,  depending on the significance of the  change, may
require prior FDA approval before being implemented. FDA regulations also require investigation and
correction of any deviations from cGMP and impose reporting and documentation requirements upon a
company and any third-party manufacturers that a  company  may decide  to  use. Accordingly,
manufacturers must continue to expend  time, money  and effort  in the area  of  production  and quality
control to maintain compliance with cGMP and other aspects of regulatory compliance.

We  rely, and expect to continue to rely, on  third parties for  the production of clinical  and

commercial quantities of our product candidates. Future FDA and state  inspections  may identify
compliance issues at our facilities or  at  the facilities of our contract manufacturers that may disrupt
production or distribution, or require substantial resources to correct.  In addition, discovery of
previously unknown problems with a product  or the failure to comply with applicable requirements may
result in restrictions on a product, manufacturer or holder  of an approved  NDA, including withdrawal
or recall of the product from the market  or  other  voluntary,  FDA-initiated or judicial action that could
delay or prohibit further marketing.

Newly discovered or developed safety or effectiveness  data may require changes to a  product’s
approved labeling, including the addition  of new warnings and contraindications, and  also may require
the implementation of other risk management measures.  Also, new  government  requirements, including
those resulting from new legislation,  may  be established,  or the FDA’s policies  may change, which  could
delay or prevent regulatory approval  of our products  under development.

FDA Animal Efficacy Rule for Approval of Medical Countermeasures

Marketing approval by the FDA for  new medical countermeasures in situations for which human
efficacy testing is not feasible or ethical,  such as  for ARS, is based  on the so-called ‘‘Animal Efficacy
Rule.’’ Under this rule, FDA can rely on the evidence from animal studies to provide substantial
prediction of effectiveness of an agent  in humans, when  coupled with:

(cid:127) a reasonably well understood pathophysiological mechanism  for the  toxicity of the radiological or

nuclear substance and its amelioration  or prevention  by  the agent;

(cid:127) protective effect is demonstrated in  generally more than one animal  species expected to react
with a response predictive for humans, and hence  be  a reliable  indicator of  its effectiveness in
humans;

(cid:127) animal study endpoint is clearly related to the desired benefit  in humans; and

(cid:127) data or information on the pharmacokinetics and pharmacodynamics of the  product in  animals
and humans is sufficiently well understood  to  allow selection of a dose predicted to be effective
in humans.

The Hatch-Waxman Amendments to the  FDC 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

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has the same active ingredients in the same  strengths and dosage  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, pre-clinical 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 statement certifying that its  proposed  ANDA label does  not contain  (or  carves 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 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  approve 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
extension. The allowable patent term  extension is  calculated as  half of the drug’s testing phase—the
time between IND application 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 the  FDA
determines that the applicant did not  pursue approval with due  diligence. The  total  patent  term after
the extension may not exceed 14 years.

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The Foreign Corrupt Practices Act

The Foreign Corrupt Practices Act, or FCPA, prohibits any  U.S.  individual or business from
paying,  offering, or authorizing payment  or offering of anything of  value, directly or  indirectly, to any
foreign official, political party or candidate for the purpose of influencing any act or decision  of  the
foreign entity in order to assist the individual or  business in  obtaining or  retaining business. The FCPA
also obligates companies whose securities  are listed in the United States to comply with accounting
provisions requiring the company to maintain books and records that accurately  and fairly reflect all
transactions of the corporation, including  international  subsidiaries,  and to devise  and maintain an
adequate system of internal accounting controls for international operations.

Europe and Other International Government  Regulation

In addition to regulations in the United  States,  we will be subject  to  a  variety  of regulations in

other jurisdictions governing, among  other things,  clinical trials and any commercial sales  and
distribution of our products. Whether  or not we  obtain  FDA approval for  a product,  we must obtain
the requisite approvals from regulatory  authorities  in foreign countries  prior to the commencement of
clinical trials or marketing of the product in  those countries. Some countries  outside of  the United
States have a similar process that requires the submission of a clinical trial application, or CTA, much
like the IND  prior to the commencement  of human  clinical trials. In  Europe,  for example,  a CTA must
be submitted to each country’s national health authority  and  an  independent ethics committee, much
like the FDA and IRB, respectively.  Once  the CTA  is approved  in accordance with  a country’s
requirements, clinical trial development  may  proceed.

To obtain regulatory approval to commercialize a new drug under European Union  regulatory

systems, we must submit a marketing authorization application, or MAA. The MAA is similar to the
NDA,  with the exception of, among other  things, country-specific document requirements.

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 applicable regulatory  requirements  and the ethical principles  that  have
their origin in the Declaration of Helsinki.

Compliance

During  all phases of development (pre- and  post-marketing),  failure to comply with applicable
regulatory requirements may result in  administrative or judicial sanctions. These sanctions  could  include
the FDA’s imposition of a clinical hold on  trials, refusal to approve pending applications, withdrawal of
an approval, warning letters, product  recalls, product  seizures, total  or  partial suspension of production
or distribution, product detention or  refusal to permit the import or export  of  products, injunctions,
fines, civil penalties or criminal prosecution. Any agency or judicial  enforcement  action could have a
material adverse effect on us.

Other  Special Regulatory Procedures

Orphan Drug Designation

The FDA may grant Orphan Drug Designation  to  drugs intended  to  treat a rare disease or

condition that affects fewer than 200,000  individuals in the United States,  or, if the disease or condition
affects more than 200,000 individuals  in the  United States, there is no reasonable expectation that the
cost of developing and making the drug would be recovered from sales in  the United  States.  In  the
European Union, the EMA’s Committee for Orphan Medicinal Products, or  COMP, grants  Orphan
Drug Designation to promote the development of products that  are  intended  for the  diagnosis,

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prevention or treatment of life-threatening or chronically  debilitating  conditions affecting not more  than
five in 10,000 persons in the European  Union community.  Additionally,  designation  is granted for
products intended for the diagnosis, prevention or  treatment of a  life- threatening, seriously debilitating
or serious and chronic condition and when, without incentives, it  is unlikely that sales of the  drug in
the European Union would be sufficient  to justify  the necessary investment in developing the  drug.

In the United States, Orphan Drug Designation entitles a party to financial  incentives, such as
opportunities for grant funding towards  clinical trial costs, tax  credits for  certain research and user fee
waivers under certain circumstances.  In addition, if a  product receives  the first FDA approval for the
indication for which it has orphan designation, the product is entitled to seven  years  of  market
exclusivity, which means the FDA may not approve any  other application for the same drug  for the
same indication for a period of seven years, except in limited circumstances, such as a showing of
clinical superiority over the product with orphan  exclusivity.  Orphan drug  exclusivity does  not  prevent
the FDA from approving a different  drug for the  same disease or condition, or the  same drug for a
different disease or condition.

In the European Union, Orphan Drug  Designation  also entitles a party  to  financial  incentives such

as reduction of fees or fee waivers and ten years of market  exclusivity  is granted following drug
approval. This period may be reduced  to  six years if the Orphan Drug Designation criteria  are no
longer met, including where it is shown  that the product  is sufficiently profitable not to justify
maintenance of market exclusivity.

Orphan  drug designation must be requested before submission of  an  application  for marketing

approval. Orphan drug designation does not convey any advantage in, or shorten the duration  of the
regulatory review and approval process.

Priority Review (United States) and Accelerated Review (European Union)

Based on results of the Phase 3 clinical  trial(s) submitted  in an NDA, upon the request of an
applicant, a priority review designation may  be  granted to a product by  the FDA,  which sets  the target
date  for FDA action on the application  at  six months from FDA  filing,  or eight months from the
sponsor’s submission. Priority review is given where preliminary  estimates indicate that a product, if
approved, has the potential to provide a  safe and effective therapy where no satisfactory alternative
therapy exists, or a significant improvement compared to marketed products is possible. If  criteria are
not met for priority review, the standard  FDA  review period is ten  months from FDA filing,  or
12 months from sponsor submission. Priority review  designation does not change  the scientific/medical
standard for approval or the quality of  evidence necessary  to support approval.

Under the Centralized Procedure in the European Union, the  maximum timeframe for  the

evaluation of a marketing authorization application 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
CHMP). 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, defined by three cumulative criteria: the
seriousness of the disease (e.g., heavy  disabling  or life-threatening diseases) to be treated; the  absence
or insufficiency of an appropriate alternative  therapeutic  approach; and  anticipation of  high therapeutic
benefit. In this circumstance, EMA ensures  that the opinion of the CHMP is given  within 150  days.

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 FDA may grant  full  or partial waivers,  or deferrals, for

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submission of data. Unless otherwise required by regulation,  PREA does not apply to any drug for an
indication for which orphan designation  has been  granted.

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.  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 studies, and the  applicant agreeing to perform,  and reporting on,  the requested
studies within the statutory timeframe. Applications under the  BPCA are  treated as priority
applications, with all of the benefits that  designation  confers.

Healthcare Reform

In March 2010, the President of the United States signed  one  of  the most  significant healthcare
reform measures in decades. The Affordable Care Act, substantially changes  the way healthcare will  be
financed by both governmental and private insurers, and significantly impacts the pharmaceutical
industry. The Affordable Care Act will impact existing government  healthcare programs and  will  result
in the development of new programs. For example, the Affordable  Care  Act provides  for Medicare
payment for performance initiatives and improvements  to  the physician  quality reporting system and
feedback program.

Among the Affordable Care Act’s provisions  of  importance to the pharmaceutical industry are  the

following:

(cid:127) an annual, nondeductible fee on any entity that manufactures  or imports  specified branded
prescription drugs and biologic agents apportioned among these entities according  to  their
market share in some government healthcare  programs,  beginning  in 2011;

(cid:127) an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid

Drug Rebate Program, retroactive to January 1, 2010, to 23%  and 13% of the average
manufacturer price for most branded and  generic drugs, respectively;

(cid:127) 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;

(cid:127) a new  Medicare Part D coverage gap discount  program,  in which manufacturers must agree to
offer 50% point-of-sale discounts off negotiated prices of applicable  brand drugs  to  eligible
beneficiaries during their coverage gap period, as a  condition for  the manufacturers’ outpatient
drugs to be covered under Medicare Part  D;

(cid:127) extension of manufacturers’ Medicaid rebate liability to covered  drugs dispensed to individuals

who are enrolled in Medicaid managed care organizations;

(cid:127) expansion of eligibility criteria for Medicaid programs by,  among other things, allowing states  to

offer Medicaid coverage to additional  individuals beginning in 2014  and by adding  new
mandatory eligibility categories for individuals with income  at  or  below 133% of the  Federal
Poverty Level, thereby potentially increasing manufacturers’  Medicaid rebate liability;

(cid:127) expansion of the entities eligible for discounts under  the Public Health Service  pharmaceutical

pricing program;

(cid:127) new requirements to report annually specified financial  arrangements  with physicians and

teaching hospitals, as defined in the Affordable Care Act and its implementing regulations,
including reporting any ‘‘payments or transfers  of value’’  made or distributed to prescribers,
teaching hospitals, and other healthcare providers and reporting any ownership and investment

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interests held by physicians and other  healthcare providers and their immediate family  members
and applicable group purchasing organizations during the preceding calendar  year, with data
collection to be required beginning August 1, 2013 and reporting to the Centers for Medicare
and Medicaid Services to be required  by  March 31,  2014 and by  the 90th  day of each subsequent
calendar year;

(cid:127) a new  requirement to annually report  drug  samples that manufacturers and  distributors  provide

to physicians; and

(cid:127) 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 Affordable Care Act also establishes  an Independent Payment Advisory  Board, or IPAB, to
reduce the per capita rate of growth in Medicare  spending.  Beginning in  2014, IPAB is mandated to
propose changes in Medicare payments  if  it determines that the rate  of  growth of Medicare
expenditures exceeds target growth rates. The IPAB has broad discretion to propose policies to reduce
expenditures, which may have a negative  impact on  payment rates for pharmaceutical  products. A
proposal made by the IPAB is required to be implemented by the  U.S.  government’s Centers for
Medicare & Medicaid Services unless Congress adopts a proposal with savings greater than those
proposed by the IPAB. IPAB proposals may impact payments for physician and free-standing services
beginning in 2015 and for hospital services beginning  in 2020.

In addition, other legislative changes have been proposed and adopted since the Affordable  Care

Act was enacted. On August 2, 2011,  the President  signed into law the Budget  Control Act of 2011,
which,  among other things, created the Joint Select Committee  on Deficit  Reduction to recommend
proposals in spending reductions to Congress. The Joint Select Committee did  not  achieve its  targeted
deficit reduction of at least $1.2 trillion  for  the years 2013 through  2021, triggering the  legislation’s
automatic reductions to several government programs. These  reductions include aggregate reductions to
Medicare payments to providers of up to 2% per fiscal year, starting in  2013. On January  2, 2013,
President Obama signed into law the American  Taxpayer Relief Act of 2012, which,  among  other
things, reduced Medicare payments to several providers and increased the statute of limitations period
for the government to recover overpayments to providers from three  to  five years. These  new laws may
result in additional reductions in Medicare and other healthcare funding, which  could  have a material
adverse effect on our customers and accordingly, our financial operations.

We  anticipate that the Affordable Care Act will  result in additional downward pressure on
coverage and the price that we receive for any approved  product, and could seriously harm our
business. Any reduction in reimbursement from Medicare and  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. In addition, it is possible that there will be further
legislation or regulation that could harm our business, financial condition, and results of operations.

Coverage and Reimbursement

In the US, many independent third-party payers, as  well as  the Medicare  and state Medicaid
programs, reimburse buyers of pharmaceutical products. Medicare is  the  federal program that provides
health care benefits to senior citizens and  certain  disabled and chronically ill  persons. Medicaid is  the
federal program administered by the  states to provide health care benefits to certain indigent  persons.
In return for  including our pharmaceutical commercial products in the  Medicare and Medicaid
programs, we may need to agree to pay  a rebate to state Medicaid agencies that provide
reimbursement for those products. We  will  also have to agree to sell our commercial products under
contracts with the Department of Veterans  Affairs, Department of Defense, Public Health Service,  and
numerous other federal agencies as well as certain  hospitals that are designated as 340B  covered

30

entities (entities designated by federal programs to receive  drugs  at  discounted prices) at prices that are
significantly below the price we may charge to commercial pharmaceutical distributors. These programs
and contracts are highly regulated and  may  impose  restrictions on our business. Failure to comply with
these regulations and restrictions could  result in  a loss  of  our ability to continue receiving
reimbursement for our drugs once approved.

Different pricing and reimbursement  schemes exist in  other  countries. In the European
Community, governments influence the  price of pharmaceutical products  through their pricing and
reimbursement rules and control of national health care systems that fund  a large part of the cost of
those products to consumers. Some jurisdictions  operate positive  and negative list systems  under which
products may only be marketed once a  reimbursement  price has been agreed. To  obtain  reimbursement
or pricing approval, some of these countries may require the completion of clinical trials that compare
the cost-effectiveness of a particular drug  candidate to currently  available therapies. Other  member
states allow companies to fix their own prices for  medicines, but monitor  and control company  profits.
The downward pressure on health care  costs  in general, particularly prescription  drugs, has become
very intense. As a result, increasingly  high  barriers are being  erected to the  entry of new products.  In
addition, in some countries, cross-border  imports from low-priced  markets exert a  commercial pressure
on pricing within a country. There can be no assurance  that any country  that  has price controls  or
reimbursement limitations for dug products  will allow  favorable  reimbursement and  pricing
arrangements of our products.

Other  Healthcare Laws and Compliance Requirements

The federal Anti-Kickback Statute prohibits,  among other things,  knowingly and willfully offering,
paying,  soliciting or receiving remuneration to induce or  in return for purchasing,  leasing, ordering or
arranging for the purchase, lease or order of any healthcare  item or  service  reimbursable  under
Medicare, Medicaid or other federally  financed  healthcare programs. This statute has been interpreted
to apply to arrangements between pharmaceutical  manufacturers on  one hand  and prescribers,
purchasers, and formulary managers on  the other. Although  there are a number  of statutory
exemptions and regulatory safe harbors protecting some business  arrangements from  prosecution,  the
exemptions and safe harbors are drawn narrowly and practices that  involve remuneration intended to
induce prescribing, purchasing or recommending may be subject to scrutiny if  they do  not  qualify for an
exemption or safe harbor. Our practices may  not  in all cases meet all  of the criteria for  safe harbor
protection from federal Anti-Kickback Statute liability. The reach of the Anti-Kickback  Statute  was
broadened by the Affordable Care Act, which, among other things, amends the intent requirement  of
the federal Anti-Kickback Statute. Pursuant to the statutory  amendment,  a person or  entity  no longer
needs to have actual knowledge of this statute  or specific  intent to violate it in order to have
committed a violation. In addition, the  Affordable  Care  Act provides that the government may assert
that a claim including items or services  resulting  from a violation of the federal Anti-Kickback Statute
constitutes a false or fraudulent claim for  purposes of the  civil  False Claims Act  (discussed  below) or
the civil monetary penalties statute, which imposes  penalties  against  any person who is determined  to
have presented or caused to be presented  a claim to a federal health program that the person  knows  or
should know is for an item or service  that was  not  provided as claimed  or is false  or fraudulent.

The federal False Claims Act prohibits any person from knowingly presenting,  or causing to be
presented, a false claim for payment to  the federal  government or knowingly making,  using, or causing
to be made or used a false record or statement material to a  false  or fraudulent claim to the federal
government. As a result of a modification made by the Fraud Enforcement and Recovery Act of  2009,
a claim includes ‘‘any request or demand’’  for money or  property  presented to the U.S. government.
Recently, several pharmaceutical and  other healthcare  companies have  been prosecuted under these
laws for allegedly providing free product  to customers with  the expectation that the customers would
bill  federal programs for the product.  Other companies have been  prosecuted for causing false  claims

31

to be submitted because of the companies’  marketing  of  the product for unapproved,  and thus
non-reimbursable, uses. HIPAA created  new  federal criminal statutes that prohibit knowingly  and
willfully executing a scheme to defraud any healthcare benefit program,  including private third-party
payors and knowingly and willfully falsifying, concealing  or covering up a  material  fact or making  any
materially false, fictitious or fraudulent  statement  in connection with the delivery  of or payment  for
healthcare benefits, items or services.  Also,  many states  have similar fraud and  abuse statutes or
regulations that apply to items and services reimbursed under  Medicaid and  other  state programs, or,
in several states, apply regardless of the payor.

In addition, we may be subject to data  privacy  and security regulation by  both the  federal

government and the states in which we conduct  our  business.  HIPAA, as  amended  by  HITECH,  and its
implementing regulations, imposes requirements relating to the privacy, security  and transmission  of
individually identifiable health information. Among other things, HITECH  makes  HIPAA’s  privacy and
security standards directly applicable  to  ‘‘business associates’’—independent contractors or agents of
covered entities that receive or obtain  protected health information in connection with providing a
service on behalf of a covered entity.  HITECH also increased the civil and criminal  penalties that may
be imposed against covered entities, business  associates and  possibly other persons,  and gave  state
attorneys general new authority to file civil actions for damages or injunctions in  federal courts to
enforce the federal HIPAA laws and  seek attorney’s fees and costs associated with pursuing federal civil
actions. In addition, state laws govern the  privacy and  security of  health  information in  specified
circumstances, many of which differ from each  other  in significant ways  and may  not  have the same
effect, thus complicating compliance efforts.

In the United States, our activities are  potentially subject to additional regulation  by  various

federal, state and local authorities in  addition to the FDA, including  the Centers for  Medicare and
Medicaid Services, other divisions of  HHS (e.g.,  the Office of Inspector General), the  DOJ  and
individual U.S. Attorney offices within  the DOJ, and state and local governments.  If a drug product is
reimbursed by Medicare or Medicaid,  pricing and rebate  programs  must comply  with, as  applicable, the
Medicare Prescription Drug, Improvement,  and Modernization Act of 2003 as  well as the  Medicaid
rebate requirements of the Omnibus  Budget Reconciliation  Act of 1990,  or  the OBRA, and  the
Veterans Health Care Act of 1992, each  as amended.  Among other things, the OBRA  requires drug
manufacturers to pay rebates on prescription drugs to state Medicaid  programs and empowers states to
negotiate rebates on pharmaceutical prices, which may result in prices for our future products  that  will
likely be lower than the prices we might  otherwise  obtain. If products  are made available to authorized
users of the Federal Supply Schedule of  the General Services Administration, additional laws and
requirements apply. Under the Veterans  Health Care Act, or VHCA, drug companies are  required to
offer some drugs at a reduced price to a number  of federal agencies including the  U.S. Department of
Veterans Affairs and DoD, the Public  Health Service and some private  Public Health Service
designated entities in order to participate in other federal funding programs including  Medicaid. Recent
legislative changes require that discounted  prices be offered for specified DoD purchases for its
TRICARE program via a rebate system.  Participation under  the VHCA requires submission of pricing
data and calculation of discounts and  rebates  pursuant  to  complex statutory  formulas, as  well as the
entry into government procurement contracts governed by the  Federal Acquisition  Regulation.

Because of the breadth of these laws and the narrowness of available statutory and regulatory
exemptions, it is possible that some of our  business  activities could be subject to challenge  under one
or more of such laws. If our operations  are  found to be in violation of any of the federal and state  laws
described above or any other governmental  regulations  that apply to us, we may be subject to penalties,
including criminal and significant civil monetary penalties, damages, fines, imprisonment, exclusion from
participation in government programs, injunctions, recall or seizure of products, total or  partial
suspension of production, denial or withdrawal of pre-marketing  product  approvals,  private ‘‘qui tam’’
actions brought by individual whistleblowers in the  name of the government or refusal to allow us to

32

enter into supply contracts, including  government contracts, and  the  curtailment or  restructuring of our
operations, any of which could adversely affect our ability to operate our business and our results of
operations. To the extent that any of  our  products are sold in  a foreign country,  we may be subject to
similar foreign laws and regulations,  which may include, for instance, applicable post-marketing
requirements, including safety surveillance,  anti-fraud and abuse  laws, and implementation of  corporate
compliance programs and reporting of payments or transfers  of value to healthcare professionals.

In order to distribute products commercially, we must comply with state laws that require  the

registration of manufacturers and wholesale distributors of pharmaceutical products in a  state,
including, in some states, manufacturers and distributors who  ship products into the  state even if such
manufacturers or distributors have no  place  of business  within the  state. Some states also  impose
requirements on manufacturers and distributors to establish the  pedigree  of product in the chain of
distribution, including some states that  require  manufacturers and others to adopt  new technology
capable of tracking and tracing product  as it moves through the  distribution chain.  Several states have
enacted  legislation requiring pharmaceutical companies to,  among other things,  establish marketing
compliance programs, file periodic reports with the  state, make periodic public disclosures  on sales,
marketing, pricing, clinical trials and other  activities, and/  or register their sales representatives,  as well
as to prohibit pharmacies and other  healthcare  entities from providing specified physician prescribing
data to  pharmaceutical companies for use in sales and marketing, and to prohibit  other  specified sales
and marketing practices. All of our activities are potentially subject  to  federal and state consumer
protection and unfair competition laws.

Employees

As of December 31, 2013, we had 64  employees. We have no  collective bargaining  agreements with

our  employees and have not experienced any work stoppages. We  believe that relations with our
employees are good.

Facilities

Our corporate headquarters and research facilities are located in Newtown, Pennsylvania,  where
we lease an aggregate of approximately  9,500 square  feet of office and  laboratory space, pursuant to
lease agreements, the terms of which expire in March 2014  and September 2014, respectively. We  have
a second office located in Pennington,  New Jersey, where we lease an  aggregate  of approximately
5,200 square feet of office space pursuant  to lease agreements,  the terms  of  which expire in February
2015 and October 2014, respectively.  This  facility houses our clinical  development, clinical operations,
regulatory and commercial personnel.

We  believe that our existing facilities  are  adequate for our near-term needs. When our leases
expire, we may exercise renewal options or look for additional  or alternate space  for our operations.
We  believe that suitable additional or  alternative space would be available  if required in  the future on
commercially reasonable terms.

Legal Proceedings

We  are not a party to any legal proceedings.

33

ITEM 1A. RISK FACTORS

You should carefully consider the following  risk  factors together with the other  information contained in

this Annual Report, and in prior periodic  reports filed  pursuant to the Securities Exchange  Act  of 1934, as
amended and the filing with the SEC pursuant to the Securities Act of  1933, as  amended.  If any of the
following risks actually occur, they may materially harm our business and  our financial condition  and results
of operations. In this event, the market price of our common  stock  could decline and your investment could
be lost.

Risks Related to Our Financial Position and Capital Needs

We have  incurred significant losses since  our  inception and  anticipate that  we will continue to incur  losses in
the future.

We  are a clinical-stage biopharmaceutical company. Investment in biopharmaceutical product

development is highly speculative because  it entails substantial  upfront capital expenditures and
significant risk that a product candidate  will  fail to gain  regulatory approval  or become  commercially
viable. We do not have any products approved by regulatory authorities for  marketing  and have  not
generated any revenue from product  sales to date,  and  we continue  to  incur  significant research,
development and other expenses related to our ongoing operations.  As a result, we are not profitable
and have incurred losses in every reporting  period since  our inception in 1998.  For the years ended
December 31, 2013, 2012 and 2011, we reported  net losses of $62.6  million, $29.9 million  and
$26.3 million, respectively, and we had  an  accumulated deficit  of $231.0 million at  December 31,  2013.

We  expect to continue to incur significant expenses and  operating losses for the  foreseeable future.

We  anticipate these losses to increase  as we continue  the research and development of, and seek
regulatory approvals for, our product  candidates,  and  potentially begin to commercialize any products
that may achieve regulatory approval.  We  may encounter unforeseen expenses, difficulties,
complications, delays and other unknown factors  that may adversely affect our business. The size  of  our
future net losses will depend, in part,  on the  rate of future  growth of our expenses and  our ability  to
generate revenues. If any of our product candidates fail  in clinical trials or do not gain  regulatory
approval, or if approved, fail to achieve  market acceptance, we  may never  become profitable. Even  if
we achieve profitability in the future, we may not be able to sustain  profitability in subsequent periods.

We have  a limited operating history, which may  make it difficult  for you to evaluate  the success  of our
business to date and to assess our future  viability.

Our operations to date have been limited to organizing  and staffing our  company, acquiring
product  and technology rights, discovering novel molecules  and conducting  product development
activities for our product candidates.  We have not yet  obtained regulatory approval  for any of our
product  candidates. Consequently, any predictions about our future success, performance or viability
may not be as accurate as they could be if we had a longer  operating history  or approved  products on
the market.

We currently have no source of product revenue and may never become profitable.

To date, we have not generated any revenues from commercial product sales.  Our ability to

generate revenue from product sales and achieve profitability will depend upon our  ability to
successfully commercialize products, including any of our current product candidates, or other product
candidates that we may in-license or acquire in  the future.  Even if we are able to successfully achieve
regulatory approval for these product candidates,  we do not know when any of these products  will
generate revenue from product sales for  us, if  at all.  Our ability  to  generate revenue from product sales

34

from our current or future product candidates  also depends on a number  of  additional factors,
including our ability to:

(cid:127) successfully complete development activities, including the necessary  clinical trials;

(cid:127) complete and submit new drug applications,  or NDAs, to the U.S. Food and  Drug

Administration, or FDA, and obtain regulatory approval for  indications for which there is  a
commercial market;

(cid:127) complete and submit applications to,  and  obtain  regulatory approval from, foreign regulatory

authorities;

(cid:127) successfully complete all required regulatory agency inspections;

(cid:127) set a commercially viable price for our products;

(cid:127) obtain commercial quantities of our products at  acceptable cost levels;

(cid:127) develop a commercial organization  capable of sales, marketing and distribution for any products
we intend to sell ourselves in the markets in which we  choose to commercialize on  our own;

(cid:127) find suitable distribution partners to help  us  market,  sell and distribute  our approved products in

other markets; and

(cid:127) obtain coverage and adequate reimbursement from  third  parties, including government and

private payors.

In addition, because of the numerous risks and uncertainties associated with product development,
including that our product candidates may  not  advance  through development or  achieve  the endpoints
of applicable  clinical trials, we are unable  to predict the  timing or amount of increased expenses, or
when or if we will be able to achieve  or  maintain  profitability. Even  if we are  able to complete  the
development and regulatory process for  any product candidates, we anticipate incurring  significant costs
associated with commercializing these products.

Even if we are able to generate revenues from the sale of our products,  we may  not  become
profitable and may need to obtain additional funding to continue operations. If we fail to become
profitable or are unable to sustain profitability on  a continuing basis, then we may  be  unable to
continue our operations at planned levels  and be forced to reduce  our operations.

We are likely to require additional capital to fund  our operations and if we fail to  obtain necessary financing,
we may be unable to complete the development  and potential commercialization  of  our product candidates.

Our operations have consumed substantial amounts  of cash  since inception. We expect  to  continue
to spend substantial amounts to advance  the clinical development of our product  candidates and launch
and commercialize any product candidates  for which we receive regulatory approval, including
potentially building our own commercial  organization. We believe that existing  cash and cash
equivalents and interest thereon, will be sufficient to fund our projected operating requirements for at
least the next 12 months. However, we  will likely  require additional capital for the further  development
and potential commercialization of our  product  candidates and may also  need  to  raise additional  funds
sooner to pursue a more accelerated  development of our product candidates.

Our forecast of the period of time through which  our financial resources  will  be  adequate to
support our operations is a forward-looking statement and involves risks and uncertainties,  and actual
results could vary as a result of a number  of  factors, including the factors discussed elsewhere in this
‘‘Risk Factors’’ section. We have based  this estimate  on assumptions  that may prove to be wrong, and

35

we could utilize our available capital  resources sooner than we currently expect. Our future funding
requirements, both near and long-term,  will depend on many factors, including, but not limited  to:

(cid:127) the initiation, progress, timing, costs and results  of clinical trials for our product candidates and
future  product candidates, including our Phase  2 and Phase  3 clinical trials for rigosertib, and
our  Phase 1 trials for, briciclib and recilisib;

(cid:127) the clinical development plans we establish  for  these and other  product candidates;

(cid:127) the achievement of milestones and  our obligation to make royalty payments to Temple,  LLS, or

any other future product candidate licensor, if any, under our in-licensing agreements;

(cid:127) the number and characteristics of product candidates that  we  discover or in-license  and develop;

(cid:127) the outcome, timing and cost of regulatory  review by the FDA and  comparable foreign

regulatory authorities, including the potential  for the FDA  or comparable foreign regulatory
authorities to require that we perform more studies  than those  that we  currently  expect;

(cid:127) the costs of filing, prosecuting, defending and enforcing any patent  claims and  maintaining  and

enforcing other intellectual property rights;

(cid:127) the effect of competing technological and market developments;

(cid:127) the costs and timing of the implementation  of commercial-scale outsourced manufacturing

activities; and

(cid:127) the costs and timing of establishing  sales, marketing and distribution capabilities for any  product

candidates for which we may receive regulatory  approval in  territories where we  choose to
commercialize products on our own.

If we  are unable to expand our operations or  otherwise capitalize  on our  business opportunities

due to a lack of capital, our ability to  become profitable will be compromised.

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

Until we can generate substantial revenue from product  sales, if ever, we expect  to  seek  additional

capital through a combination of private and public equity  offerings, debt  financings, strategic
collaborations and alliances and licensing  arrangements. To the  extent that we raise additional  capital
through the sale of equity or convertible  debt securities, the ownership  interests of  existing stockholders
will be diluted, and the terms may include liquidation or other preferences that adversely affect  the
rights of existing stockholders. Debt  financing, if  available, may involve agreements  that  include
restrictive covenants limiting our ability to take  important  actions, such as incurring additional debt,
making capital expenditures or declaring  dividends. If we  raise additional  funds through strategic
collaborations and alliances or licensing  arrangements  with third parties,  we may have  to  relinquish
valuable rights to our technologies or product candidates, or grant  licenses on terms that are not
favorable to us. If we are unable to raise  additional funds  through equity or  debt financing  when
needed, we may be required to delay,  limit, reduce or terminate our  product development  or
commercialization efforts or grant rights to develop  and market  product candidates that we would
otherwise prefer to develop and market ourselves.

Unstable market and economic conditions  may have  serious  adverse consequences on our business, financial
condition and stock price.

As has been widely reported, global  credit and financial  markets have at times experienced

disruptions over the past several years, including diminished  liquidity and credit availability, declines  in
consumer confidence, declines in economic growth, increases  in unemployment rates and uncertainty

36

about economic stability. There can be no assurance that deterioration in credit  and financial markets
and confidence in economic conditions  will not occur. Our general  business  strategy may  be
compromised by economic downturns,  a  volatile business environment and unpredictable and unstable
market conditions. If the current equity  and credit markets deteriorate,  it may  make  any necessary debt
or equity financing more difficult to secure, more costly, or more dilutive. Failure to secure any
necessary financing in a timely manner and on favorable terms could harm our  growth strategy,
financial performance and stock price  and  could require  us to delay  or  abandon  our  business  and
clinical development plans. In addition,  there  is a risk that one or more  of our current service
providers, manufacturers and other partners may experience financial  difficulties, which  could  directly
affect our ability to attain our operating goals in accordance with  our schedule and budget.

Risks Related to Our Business and Industry

Our future success is dependent primarily on  the regulatory  approval and commercialization of our product
candidates, including rigosertib, which  is  currently undergoing Phase 2 and 3 clinical trials.

We  do not have any products that have gained  regulatory  approval. Currently, our only clinical-
stage product candidates are rigosertib, briciclib and recilisib, and  rigosertib IV is  our  only  late-stage
product  candidate.

As a result, our business is substantially dependent on  our ability to obtain regulatory approval for,

and, if approved, to successfully commercialize rigosertib and, to a lesser degree,  briciclib and recilisib
in a timely manner. We cannot commercialize product candidates in the United  States without  first
obtaining regulatory approval for the  product  from the FDA. Similarly, we  cannot commercialize
product  candidates outside of the United  States  without obtaining  regulatory approval  from comparable
foreign regulatory  authorities. Before obtaining  regulatory approvals for  the commercial sale of any
product  candidate for a target indication, we  must demonstrate  with substantial  evidence gathered  in
preclinical and well-controlled clinical studies,  generally including two well-controlled Phase 3 trials,
and, with respect to approval in the United States, to the satisfaction of the FDA, that the product
candidate is safe and effective for use  for that  target  indication  and  that the manufacturing  facilities,
processes and controls are adequate.  Even  if  rigosertib  or another product  candidate were  to
successfully obtain approval from the  FDA and comparable foreign regulatory authorities, any approval
might contain significant limitations related  to  use restrictions  for specified age groups, warnings,
precautions or contraindications, or may  be  subject to burdensome post-approval study or risk
management requirements. If we are unable to obtain regulatory  approval for rigosertib in one or  more
jurisdictions, or any approval contains significant  limitations, we may not be able to obtain sufficient
funding or generate sufficient revenue  to  continue  the development of briciclib, recilisib, or any other
product  candidate that we may discover, in-license, develop or acquire in the  future. Furthermore, even
if we obtain regulatory approval for rigosertib, we will still need  to  develop a  commercial organization,
establish commercially viable pricing and  obtain  approval for adequate  reimbursement from third-party
and government payors. If we or our commercialization collaborators  are unable to successfully
commercialize rigosertib, we may not  be  able to earn sufficient revenues to  continue our business.

The results of preclinical testing or earlier clinical studies are not necessarily predictive  of future results,
rigosertib, or any other product candidate we  advance into clinical  trials may not have  favorable  results in
later-stage clinical trials or receive regulatory approval.

Success in preclinical testing and earlier clinical studies  does not ensure that later  clinical trials  will

generate adequate data to demonstrate  the efficacy and safety of  an investigational drug. A number  of
companies in the pharmaceutical and biotechnology industries, including those with greater resources
and experience, have suffered significant setbacks in  clinical trials, even after seeing  promising results in
earlier clinical trials. Despite the results  reported in earlier clinical trials for  rigosertib  and our other
clinical-stage product candidates, we do  not  know whether the later-stage clinical  trials we may  conduct

37

in the future will demonstrate adequate efficacy  and safety to result in  regulatory approval  to  market
any of our product candidates in any particular jurisdiction. If later-stage  clinical trials do not produce
favorable results, our ability to achieve  regulatory approval for  any of our product candidates may  be
adversely impacted.

Clinical drug development involves a lengthy  and expensive process  with an uncertain outcome.

Clinical testing is expensive, can take many years to complete, and its outcome  is inherently
uncertain. Failure can occur at any time during the clinical trial  process. Product candidates  in later
stages of clinical trials may fail to show the desired safety and efficacy traits despite having  progressed
through preclinical studies and early clinical trials.

We  may experience delays in our ongoing or  future clinical trials and we do not know whether
planned clinical trials will begin or enroll  subjects  on time,  need to be redesigned or  be  completed on
schedule, if at all. For example, we experienced  a clinical hold with our initial  IND submission for
recilisib based on the need to conduct additional  toxicology studies and to revise  quality requirements
for manufacture of the drug product.  While we  do not anticipate any such delays, there  can be no
assurance that the  FDA will not put  clinical trials  of recilisib  or any other of our product candidates on
clinical hold in the future. Clinical trials  may be delayed,  suspended or prematurely terminated for  a
variety of reasons, such as:

(cid:127) 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;

(cid:127) 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 study;

(cid:127) delay or failure in reaching agreement  on acceptable terms with prospective  contract research
organizations, or CROs, and clinical trial sites,  the terms  of  which can be subject to extensive
negotiation and may vary significantly among different CROs and  trial sites;

(cid:127) delay or failure in obtaining institutional review board, or IRB, approval or the approval  of
other reviewing entities, including comparable foreign  regulatory authorities,  to  conduct  a
clinical trial at each site;

(cid:127) withdrawal of clinical trial sites from our  clinical trials  as a  result  of changing  standards of care

or the ineligibility of a site to participate in  our  clinical trials;

(cid:127) delay or failure in recruiting and enrolling suitable subjects to participate in  a trial;

(cid:127) delay or failure in subjects completing a  trial or returning  for post-treatment follow-up;

(cid:127) clinical sites and investigators deviating from trial protocol, failing to conduct the trial  in

accordance with regulatory requirements, or dropping out of a trial;

(cid:127) inability to identify and maintain a sufficient number of trial sites,  many of which may already be
engaged in other clinical trial programs, including  some that may be for the  same indication;

(cid:127) failure of our third-party clinical trial  managers  to  satisfy  their contractual  duties or meet

expected deadlines;

(cid:127) delay or failure in adding new clinical trial sites;

(cid:127) delay or failure in meeting regulatory agency inspectional requirements;

(cid:127) ambiguous or negative interim results or results  that are inconsistent  with earlier results;

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(cid:127) feedback from the FDA, the IRB,  data safety monitoring boards,  or a comparable foreign

regulatory authority, or results from  earlier stage  or concurrent preclinical and clinical studies,
that might require modification to the  protocol  for the  trial;

(cid:127) decision by the FDA, the IRB, a comparable foreign  regulatory authority,  or us, or

recommendation by a data safety monitoring board or comparable  foreign regulatory authority,
to suspend or terminate clinical trials  at any time for safety issues or for any  other reason;

(cid:127) unacceptable risk-benefit profile, unforeseen safety  issues  or  adverse side effects;

(cid:127) failure to demonstrate a benefit from using a  drug;

(cid:127) difficulties in manufacturing or obtaining from  third parties sufficient quantities  of  a product

candidate for use in clinical trials;

(cid:127) lack of adequate funding to continue the  clinical trial, including the  incurrence  of unforeseen

costs due to enrollment delays, requirements to conduct additional  clinical  studies or  increased
expenses associated with the services  of  our  CROs and other  third parties;  or

(cid:127) changes in governmental regulations or  administrative actions  or lack of  adequate funding to

continue the clinical trial.

Patient enrollment, a significant factor in the  timing of clinical trials, is affected by many  factors
including the size and nature of the patient population,  the proximity of subjects  to  clinical sites, the
eligibility criteria for the trial, the design  of the  clinical trial, ability to obtain  and maintain patient
consents, risk that enrolled subjects will  drop  out before completion, competing clinical trials and
clinicians’ and patients’ perceptions as  to  the potential  advantages  of  the drug being studied in  relation
to other available therapies, including any new drugs that may be approved for  the indications we are
investigating. In 2011, we suspended enrollment in  our  Phase 1  trial of briciclib because enrollment of
patients was occurring so slowly that  our  inventory of briciclib clinical  trial material expired. We are
planning to resume Phase 1 development of briciclib in 2014  with a multi-site dose escalation study in
patients with advanced solid tumors refractory to current therapies. Furthermore, we  rely on CROs and
clinical trial sites to ensure the proper  and timely conduct of our  clinical trials,  and while we have
agreements governing their committed  activities, we have  limited  influence  over their  actual
performance.

If we  experience delays in the completion or termination of, any  clinical trial of  our product

candidates, the commercial prospects  of our product candidates will be harmed,  and our ability to
generate product revenues from any  of  these product  candidates will be delayed.  In addition, any delays
in completing our clinical trials will increase our costs,  slow down our product candidate development
and approval process and jeopardize  our ability to commence product  sales  and generate revenues. In
addition, many of the factors that could cause a delay  in the commencement or completion of clinical
trials may also ultimately lead to the  denial of regulatory approval of our product candidates.

The regulatory approval processes of the FDA and comparable foreign regulatory authorities are lengthy, time
consuming and inherently unpredictable, and if we are ultimately unable  to  obtain regulatory approval for  our
product candidates, our business will be substantially harmed.

The time required to obtain approval  by  the FDA and comparable foreign  regulatory authorities is

unpredictable, but typically takes many  years  following  the commencement of  preclinical studies  and
clinical trials and depends upon numerous factors, including the substantial discretion of the  regulatory
authorities. In addition, approval policies, regulations, or the type and amount of clinical data necessary
to gain approval may change during the course of a  product candidate’s  clinical development and  may
vary among jurisdictions. We have not obtained regulatory approval  for any product  candidate, and it  is

39

possible that none of our existing product candidates or  any product candidates  we may  discover,
in-license or acquire and seek to develop  in the future will ever obtain  regulatory approval.

Our product candidates could fail to receive  regulatory approval from the FDA or a  comparable

foreign regulatory  authority for many reasons,  including:

(cid:127) disagreement over the design or implementation  of  our  clinical trials;

(cid:127) failure to demonstrate that a product candidate is safe and effective for its proposed  indication;

(cid:127) failure of clinical trials to meet the level  of  statistical  significance  required for approval;

(cid:127) failure to demonstrate that a product candidate’s clinical and other benefits outweigh  its  safety

risks;

(cid:127) disagreement over our interpretation of  data  from preclinical  studies or clinical trials;

(cid:127) delay or failure in meeting regulatory agency inspectional requirements;

(cid:127) disagreement over whether to accept  efficacy results from clinical  trial sites outside the United
States or clinical trial sites where the standard of care is potentially different from that in  the
United States;

(cid:127) the insufficiency of data collected from clinical trials of our  product candidates  to  support the

submission and filing of an NDA or other submission or to obtain regulatory approval;

(cid:127) disapproval of the manufacturing processes or facilities  of  third-party manufacturers with whom

we contract for clinical and commercial  supplies;  or

(cid:127) changes in the approval policies or  regulations that render our preclinical  and clinical data

insufficient for approval.

The FDA or a comparable foreign regulatory authority  may require more information, including
additional preclinical or clinical data  to  support approval, which may delay or prevent approval and  our
commercialization plans, or we may decide  to  abandon the development program altogether. Even if
we do obtain regulatory approval, our  product candidates  may be approved for fewer or  more limited
indications than we request, approval contingent  on the  performance of costly post-marketing clinical
trials, or approval with a label that does not include the labeling claims necessary or desirable for  the
successful commercialization of that product candidate. In addition,  the FDA  may require the
establishment of Risk Evaluation Mitigation Strategies, or  REMS, or a comparable foreign  regulatory
authority may require the establishment  of a  similar strategy, that  may restrict distribution of our
products and impose burdensome implementation requirements on us.  Any of  the foregoing scenarios
could materially harm the commercial prospects  for our product  candidates.

Approval by the FDA does not ensure  approval by foreign  regulatory authorities  and approval  by
one or more foreign regulatory authorities  does not ensure approval  by regulatory authorities in  other
countries or by the FDA. However, a  failure or delay  in obtaining regulatory approval in  one  country
may have a negative effect on the regulatory  process  in others. We may not be able to file for
regulatory approvals and even if we file  we may not receive the necessary approvals  to  commercialize
our  products in any market.

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

Undesirable side effects caused by our product  candidates could  cause us or regulatory  authorities

to interrupt, delay or halt clinical trials  and could result in a more  restrictive label or  the delay  or
denial of regulatory approval by the  FDA or other comparable foreign  regulatory authority. For

40

example, patients in our earlier-stage clinical trials  of  rigosertib in some cases experienced  side effects,
some of which were severe.

As a result of undesirable side effects or safety  or toxicity issues  that we  may experience in our

clinical trials, we may not receive approval  to  market  any product candidates, which could prevent us
from ever generating revenues or achieving profitability. Results of our trials could reveal an
unacceptably high severity and prevalence of 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 or deny approval of our product candidates for any or all targeted
indications. These side effects could affect  patient  recruitment  or the ability of  enrolled subjects  to
complete the trial or result in potential  product liability claims.

Additionally, if any of our product candidates receives marketing  approval, and we  or others later

identify undesirable side effects caused  by such product,  a number  of potentially significant negative
consequences could result, including:

(cid:127) we may be forced to suspend marketing of  such product;

(cid:127) regulatory authorities may withdraw their approvals  of such product;

(cid:127) regulatory authorities may require  additional warnings  on the label that could diminish  the usage

or otherwise limit the commercial success  of such products;

(cid:127) we may be required to conduct post-market studies;

(cid:127) we could be sued and held liable for harm caused to subjects  or patients;  and

(cid:127) our reputation may suffer.

Any of these events could prevent us  from achieving  or maintaining market acceptance of the

particular product candidate, if approved.

Even if our product candidates receive regulatory approval,  they may still face future development  and
regulatory difficulties.

Even if we obtain regulatory approval for a product  candidate, it  would be subject  to  ongoing

requirements by the FDA and comparable foreign regulatory authorities governing the  manufacture,
quality control, further development, labeling, packaging, storage, distribution, safety  surveillance,
import, export, advertising, promotion,  recordkeeping  and reporting of safety and other post-market
information. The safety profile of any  product will continue  to  be  closely monitored by the FDA and
comparable foreign regulatory authorities  after approval.  If the FDA  or comparable foreign regulatory
authorities become aware of new safety  information  after approval of any  of our  product candidates,
they may require labeling changes or establishment of a REMS  or  similar strategy, impose significant
restrictions on a product’s indicated uses  or  marketing,  or impose ongoing requirements  for potentially
costly post-approval studies or post-market  surveillance. The label ultimately  approved for rigosertib, if
it achieves marketing approval, may include restrictions on use.

In addition, manufacturers of drug products  and their facilities are subject to continual review and

periodic inspections by the FDA and  other regulatory  authorities for compliance with current good
manufacturing practices, or cGMP, and  other  regulations.  If we or a regulatory agency  discover
previously unknown problems with a product,  such as adverse  events of unanticipated severity or
frequency, or problems with the facility  where  the product  is manufactured,  a regulatory  agency may
impose restrictions on that product, the  manufacturing facility or us, including requiring recall  or
withdrawal of the product from the market  or suspension of manufacturing.  If we,  our product

41

candidates or the manufacturing facilities  for  our  product candidates  fail to comply  with applicable
regulatory requirements, a regulatory agency may:

(cid:127) issue warning letters or untitled letters or  otherwise unacceptable  inspectional findings;

(cid:127) mandate modifications to promotional materials or require  us to provide corrective  information

to healthcare practitioners;

(cid:127) require us to enter into a consent decree, which can  include  imposition of various  fines,

reimbursements for inspection costs, required  due  dates for specific actions and penalties for
noncompliance;

(cid:127) seek an injunction or impose civil or criminal penalties or monetary fines;

(cid:127) suspend or withdraw regulatory approval;

(cid:127) suspend any ongoing clinical studies;

(cid:127) refuse  to approve pending applications or supplements to applications filed by us;

(cid:127) suspend or impose restrictions on  operations, including costly  new  manufacturing requirements;

or

(cid:127) seize  or detain products, refuse to  permit  the import or  export of products, or  require us to

initiate a product recall.

The occurrence of any event or penalty described  above may inhibit  our ability  to  commercialize

our  products and generate revenue.

Advertising and promotion of any product candidate that obtains approval  in the United States will

be heavily scrutinized by the FDA, the Department of  Justice, or the DOJ, the Office of  Inspector
General of the Department of Health and Human Services, or HHS, state attorneys general,  members
of Congress and the public. Violations,  including promotion  of our  products for unapproved or  off-label
uses, are subject to enforcement letters,  inquiries  and  investigations, and civil and criminal sanctions by
the FDA. Additionally, advertising and  promotion of any  product candidate  that  obtains approval
outside of the United States will be heavily scrutinized by comparable foreign regulatory authorities.

In the United States, engaging in impermissible promotion of our  products for off-label  uses can

also subject us to false claims litigation  under federal  and  state statutes, which can lead to civil and
criminal penalties and fines and agreements  that materially restrict the manner in which we promote or
distribute our drug products. These false claims statutes  include  the federal False Claims Act, which
allows any individual to bring a lawsuit against a pharmaceutical company  on behalf of  the federal
government alleging submission of false  or fraudulent claims,  or causing  to  present  such false or
fraudulent claims, for payment by a federal program such as Medicare  or Medicaid. If the  government
prevails in the lawsuit, the individual  will  share in any fines or settlement funds. Since 2004, these False
Claims Act lawsuits against pharmaceutical companies  have increased significantly in volume and
breadth, leading to several substantial civil  and criminal settlements based on  certain sales  practices
promoting off-label drug uses. This growth in  litigation has increased the risk that a pharmaceutical
company will have to defend a false claim action, pay settlement  fines or restitution, agree to comply
with burdensome reporting and compliance obligations, and be excluded from  the Medicare,  Medicaid
and other federal and state healthcare programs. If we do  not lawfully promote our approved  products,
we may become subject to such litigation  and, if we are not successful  in defending against  such
actions, those actions could compromise  our ability to become profitable.

42

Failure to obtain regulatory approval in international jurisdictions would prevent our product candidates from
being marketed abroad.

In order to market and sell our products  in the European Union  and  many  other  jurisdictions,

including Japan and Korea, we must obtain  separate  marketing  approvals and comply with numerous
and varying regulatory requirements. The approval procedure varies among countries  and can involve
additional testing. The time required  to  obtain approval may differ substantially  from that required  to
obtain FDA approval. The regulatory  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 may not  obtain approvals  from  regulatory authorities outside the
United States on a timely basis, if at  all. Approval by the  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 the FDA. 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 are unable to  obtain  approval of any of
our  product candidates by regulatory  authorities in the European Union, Japan, Korea or another
country, the commercial prospects of that  product candidate may be significantly diminished and  our
business prospects could decline.

Recently enacted and future legislation, including potentially  unfavorable pricing regulations  or other
healthcare reform initiatives, 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.

The regulations that govern, among other things, marketing approvals, coverage, pricing  and
reimbursement for new drug products vary widely  from country to country. 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 successfully
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 Medicare Modernization Act,  changed  the way Medicare covers and pays for pharmaceutical
products. The legislation expanded Medicare coverage  for  drug purchases  by  the elderly  and introduced
a new reimbursement methodology based  on average sales prices for physician  administered drugs.  In
recent years, Congress has considered  further reductions in Medicare reimbursement for drugs
administered by physicians. The Centers for Medicare and Medicaid Services,  the agency  that  runs the
Medicare program, also has the authority  to  revise reimbursement  rates and to implement coverage
restrictions for some drugs. Cost reduction  initiatives  and  changes  in coverage implemented through
legislation or regulation could decrease utilization  of  and  reimbursement for  any approved products,
which  in turn would affect the price we  can receive for those products.  While the  Medicare
Modernization Act and Medicare regulations apply only to drug benefits for Medicare beneficiaries,
private  payors often follow Medicare  coverage  policy and payment limitations  in setting  their  own
reimbursement rates. Therefore, any  reduction  in reimbursement that results from federal legislation or
regulation may result in a similar reduction  in payments from private payors.

In March 2010, President Obama signed into law the Patient  Protection  and Affordable  Care Act
and the Health Care and Education Affordability Reconciliation  Act of 2010,  or the Affordable Care
Act, 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
healthcare and health insurance industries,  impose new  taxes  and fees on pharmaceutical and medical
device manufacturers and impose additional health policy reforms. The  Affordable Care Act expanded
manufacturers’ rebate liability to include covered drugs dispensed to individuals who are enrolled  in

43

Medicaid managed care organizations,  increased  the minimum rebate  due  for innovator  drugs from
15.1% of average manufacturer price, or  AMP, to 23.1%  of AMP and capped  the total rebate amount
for innovator drugs at 100% of AMP. The  Affordable  Care Act  and subsequent legislation also  changed
the definition of AMP. Furthermore, the  Affordable Care Act imposes a significant annual,
nondeductible fee on companies that  manufacture or import certain branded prescription drug
products. Substantial new provisions affecting  compliance have  also been  enacted, which  may affect our
business practices with healthcare practitioners,  and  a significant  number of provisions are  not  yet, or
have only recently become, effective.  Although  it is too early to determine the effect of the  Affordable
Care Act, it appears likely to continue  the pressure on pharmaceutical pricing, especially under the
Medicare program, and may also increase  our regulatory burdens and operating costs.

In addition, other legislative changes have been proposed and adopted since the Affordable  Care
Act was enacted. More recently, on August 2, 2011,  the President signed into  law the  Budget Control
Act of 2011, which, among other things,  creates the  Joint Select  Committee on Deficit Reduction to
recommend to Congress proposals in  spending reductions. The Joint Select  Committee did not achieve
a targeted deficit reduction of at least $1.2  trillion for the years 2013  through 2021, triggering the
legislation’s automatic reduction to several government  programs.  This includes  aggregate reductions  to
Medicare payments to providers of up to 2% per fiscal year, starting in  2013. On January  2, 2013,
President Obama signed into law the American  Taxpayer Relief Act of 2012, which,  among  other
things, reduced Medicare payments to several providers and increased the statute of limitations period
for the government to recover overpayments to providers from three  to  five years. These  new laws may
result in additional reductions in Medicare and other healthcare funding, which  could  have a material
adverse effect on our customers and accordingly, our financial operations. 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 the FDA regulations,  guidance or interpretations will  be  changed, or  what the
impact of such changes on the marketing  approvals of our product candidates, if any, may be.

In the United States, the European Union and other potentially significant  markets  for our
product  candidates, government authorities and third-party payors are increasingly attempting to limit
or regulate the price of medical products  and services, particularly for new and innovative products and
therapies, which has resulted in lower average selling prices. Furthermore, the increased emphasis on
managed healthcare in the United States  and on  country and regional pricing and reimbursement
controls in the European Union will put  additional pressure on product pricing, reimbursement  and
usage, which may adversely affect our future product sales and results of operations. These pressures
can arise from rules and practices of managed care groups,  judicial decisions and governmental laws
and regulations related to Medicare,  Medicaid and healthcare reform,  pharmaceutical reimbursement
policies and pricing in general.

Some countries require approval of the sale price of a drug before it can  be  marketed. In many

countries, the pricing review period begins after marketing or product  licensing approval is granted. In
some foreign markets, 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, possibly  for lengthy time periods,  which could negatively impact the
revenues we are able to generate from  the sale  of  the product in that particular 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.

44

Laws and regulations governing international  operations may preclude us from developing,  manufacturing and
selling certain product candidates outside  of  the United States and require us to  develop and implement costly
compliance programs.

As we expand our operations outside  of the  United States, we must  comply with  numerous laws
and regulations in each jurisdiction in which we plan to operate.  The  creation and implementation of
international business practices compliance  programs is costly and  such programs  are difficult to
enforce, particularly where reliance on  third parties is required.

The Foreign Corrupt Practices Act, or FCPA, prohibits any  U.S.  individual or business from

paying,  offering, authorizing payment  or  offering anything  of  value, directly or indirectly, to any foreign
official, political party or candidate for the purpose of influencing any  act or decision of the  foreign
entity in  order to assist the individual  or  business in obtaining or retaining  business.  The FCPA also
obligates companies whose securities  are  listed in  the United States  to  comply with certain  accounting
provisions requiring the company to maintain books and records that accurately  and fairly reflect all
transactions of the corporation, including  international  subsidiaries,  and to devise  and maintain an
adequate system of internal accounting controls for international operations. The  anti-bribery provisions
of the FCPA are enforced primarily by  the DOJ. The  Securities and Exchange  Commission, or the
SEC, is  involved with enforcement of  the books  and records provisions of  the FCPA.

Compliance with the FCPA is expensive and difficult, particularly  in countries in  which corruption

is a recognized problem. In addition, the FCPA presents  particular challenges in  the pharmaceutical
industry, because, in many countries,  hospitals are operated by  the  government, and doctors and other
hospital employees are considered foreign  officials. Certain payments to hospitals  in connection with
clinical studies and other work have been  deemed  to  be  improper  payments to government officials  and
have led to FCPA enforcement actions.

Various laws, regulations and executive orders also restrict the  use and  dissemination outside of

the United States, or the sharing with certain non-U.S. nationals, of information classified for national
security purposes, as well as certain products and technical data relating to those  products. Our
expanding presence outside of the United  States will  require us to dedicate additional  resources to
comply  with these laws, and these laws may preclude us from developing, manufacturing, or selling
certain products and product candidates  outside of the United  States, which  could  limit  our  growth
potential and increase our development  costs.

The failure to comply with laws governing  international business practices may result  in substantial
penalties, including suspension or debarment  from government contracting.  Violation of the  FCPA can
result in significant civil and criminal penalties. Indictment alone under the FCPA can lead  to
suspension of the right to do business with  the U.S. government until  the pending claims are resolved.
Conviction of a violation of the FCPA can result  in long-term disqualification as a  government
contractor. The termination of a government contract  or relationship as  a result  of our  failure to satisfy
any of our obligations under laws governing international business practices would have a negative
impact on our operations and harm our reputation and  ability  to  procure government contracts. The
SEC also may suspend or bar issuers from trading securities  on  U.S. exchanges for violations  of  the
FCPA’s accounting provisions.

Even if we are able to commercialize our product  candidates, the  products  may  not  receive coverage and
adequate reimbursement from third-party payors,  which could  harm our business.

Our ability to commercialize any products successfully will depend, in part, on  the extent to which
coverage and adequate reimbursement for these products  and related treatments will be available  from
government health administration authorities,  private health  insurers  and  other organizations.
Government authorities and third-party payors, such as private  health insurers and  health  maintenance
organizations, determine which medications  they will cover and establish reimbursement levels. A

45

primary trend in the U.S. healthcare industry and  elsewhere is cost containment. Government
authorities and third-party payors have  attempted to control costs by limiting coverage and the amount
of reimbursement for particular medications. Increasingly, third-party  payors are requiring that drug
companies provide them with predetermined discounts from  list prices  and  are challenging the prices
charged for medical products. Third-party payors may also  seek additional clinical evidence, beyond  the
data required to obtain marketing approval, demonstrating  clinical  benefits and value  in specific  patient
populations before covering our products  for  those patients. We cannot be sure that coverage and
adequate reimbursement will be available for any product  that we commercialize  and, if reimbursement
is available, what the level of reimbursement will be. Coverage and 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  at limited levels, we may not be able  to  successfully
commercialize any product candidate for  which we  obtain marketing approval.

There may be significant delays in obtaining coverage and reimbursement for newly approved
drugs, and coverage may be more limited  than the purposes for which the drug is approved  by  the
FDA or comparable foreign regulatory authorities.  Moreover, eligibility for coverage and
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 only be
temporary. 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. Third-party payors often rely upon  Medicare coverage
policy and payment limitations in setting  their own reimbursement policies. Our inability to obtain
coverage and profitable reimbursement rates from both government-funded  and private payors for any
approved products that we develop could  have a material adverse effect  on our operating  results, our
ability to raise capital needed to commercialize products and our overall financial condition.

If we are unable to establish sales and  marketing  capabilities or  enter into agreements  with third parties to
market and sell our product candidates,  we may be unable to generate any revenue.

We  do not currently have an organization for the sale, marketing and distribution of

pharmaceutical products and the cost  of  establishing and maintaining such  an organization may exceed
the cost-effectiveness of doing so. In  order  to  market  any  products that may be approved by the FDA
and comparable foreign regulatory authorities, we must build our  sales, marketing, managerial  and
other non-technical capabilities or make arrangements  with third parties to perform these services. If
we are unable to establish adequate sales, marketing and  distribution capabilities, whether
independently or with third parties, we  may  not  be  able  to generate product revenue  and may  not
become  profitable. We will be competing  with  many companies that  currently have  extensive  and
well-funded sales and marketing operations.  Without an internal commercial organization or  the
support of a third party to perform sales and marketing functions, we  may be unable to compete
successfully against these more established  companies.

Our commercial success depends upon  attaining significant market acceptance  of our product candidates,  if
approved, among physicians, patients, healthcare payors  and  the major operators of  cancer  clinics.

Even if we obtain regulatory approval for any of our  product candidates that we may  develop  or
acquire in the future, the product may  not  gain market acceptance among physicians, healthcare payors,

46

patients or the medical community. Market acceptance  of  any of  our product candidates  for which we
receive approval depends on a number of factors, including:

(cid:127) the efficacy and safety of such product candidates as demonstrated  in clinical  trials;

(cid:127) the clinical indications for which the product candidate is approved;

(cid:127) acceptance of such product candidates as a safe  and effective  treatment by physicians, major

operators of cancer clinics and patients;

(cid:127) the potential and perceived advantages of product candidates over alternative treatments;

(cid:127) the safety of product candidates seen in broader patient groups, including  its use outside the

approved indications;

(cid:127) the prevalence and severity of any  side effects;

(cid:127) product labeling or product insert  requirements  of  the FDA  or other regulatory authorities;

(cid:127) the timing of market introduction  of our products as well as competitive products;

(cid:127) the cost of treatment in relation to  alternative treatments;

(cid:127) the availability of coverage and adequate reimbursement and pricing by third-party  payors and

government authorities;

(cid:127) relative convenience and ease of administration; and

(cid:127) the effectiveness of our sales and marketing  efforts and those of  our collaborators.

If any of our product candidates are  approved but fail to achieve market  acceptance  among
physicians, patients, or healthcare payors,  we may not be able to generate significant revenues,  which
would compromise our ability to become  profitable.

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.

Healthcare providers, physicians and  third-party  payors  will  all play important  roles 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 would  market, sell and distribute  our  products. As a
pharmaceutical company, even though we  do not and will not control referrals  of healthcare services or
bill  directly to Medicare, Medicaid or  other third-party payors, federal and state healthcare laws and
regulations pertaining to fraud and abuse  and  patients’ rights are and  will be applicable to our business.
Restrictions under applicable federal  and  state healthcare laws  and regulations that may  affect our
ability to operate include the following:

(cid:127) the federal healthcare Anti-Kickback Statute will constrain our marketing practices, educational

programs, pricing policies, and relationships  with healthcare providers or other entities,  by
prohibiting, among other things, persons  from knowingly and willfully soliciting, offering,
receiving or providing 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;

(cid:127) federal civil and criminal false claims laws and civil monetary  penalty laws impose  criminal and
civil penalties, including through civil whistleblower  or qui  tam  actions, against individuals or

47

entities for knowingly presenting, or  causing to be presented,  to  the federal government,
including the Medicare and Medicaid programs, 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;

(cid:127) 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  and
also created federal criminal laws that prohibit knowingly  and willfully falsifying,  concealing or
covering up a material fact or making  any materially false statements in  connection with  the
delivery of or payment for healthcare  benefits, items or services;

(cid:127) HIPAA, as amended by the Health  Information  Technology  for Economic and  Clinical  Health

Act, or HITECH, also imposes obligations,  including  mandatory contractual  terms, with  respect
to safeguarding the privacy, security and transmission of individually identifiable health
information;

(cid:127) the federal physician sunshine requirements under  the Affordable Care Act requires

manufacturers of drugs, devices, biologics and medical supplies to report annually to HHS
information related to payments and other transfers of value to physicians, other healthcare
providers, and teaching hospitals, and ownership and investment interests held  by  physicians  and
other healthcare providers and their immediate family  members  and applicable group purchasing
organizations; and

(cid:127) 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; 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 govern  the privacy and security of health information in
specified 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 from government funded healthcare programs, such as  Medicare and
Medicaid, and the curtailment or restructuring of our operations. If  any  physicians or other  healthcare
providers or entities with whom we expect to do business are  found  to  not be in compliance with
applicable laws, they may be subject  to  criminal, civil  or administrative  sanctions, including exclusions
from government funded healthcare programs.

Our employees may engage in misconduct  or other improper activities, including noncompliance with
regulatory standards and requirements, which  could cause  significant liability  for us and harm our reputation.

We  are exposed to the risk of employee fraud  or other misconduct, including intentional failures to

comply  with FDA regulations or similar  regulations  of comparable  foreign regulatory authorities,
provide accurate information to the FDA or comparable foreign  regulatory authorities, comply with
manufacturing standards we have established, comply with federal and state healthcare  fraud and abuse
laws and regulations and similar laws  and  regulations  established and enforced by comparable foreign

48

regulatory authorities, report financial  information or data accurately or disclose unauthorized  activities
to us. Employee misconduct could also  involve  the improper use of information obtained in the course
of clinical trials, which could result in regulatory sanctions and serious harm to our reputation.  We have
adopted a code of conduct for our directors, officers and employees, or the  Code  of Conduct, but it is
not always possible to identify and deter  employee  misconduct,  and the precautions  we take to detect
and prevent this activity may not be effective  in controlling unknown or unmanaged  risks  or losses or in
protecting us from governmental investigations  or other actions  or  lawsuits stemming from  a failure to
be in compliance with such laws or regulations.  If any such actions  are  instituted  against us, and we are
not successful in defending ourselves or  asserting our rights, those  actions could have a significant
impact on our business and results of operations,  including the  imposition of significant  fines or other
sanctions.

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

The development and commercialization of  new drug products is highly competitive. We face
competition with respect to our current  product candidates,  rigosertib, briciclib  and recilisib, 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.

Our product candidates are being developed  for  cancer therapeutics and radiation protection.
There are a variety of available therapies and supportive  care  products marketed for cancer patients. In
many  cases, these drugs are administered in combination to enhance efficacy or to reduce side effects.
Some of these drugs are branded and  subject to patent protection,  and others are available on  a
generic basis. Many of these approved drugs are well established therapies or  products and are  widely
accepted by physicians, patients and third-party payors. Insurers and other third-party payors  may also
encourage the use of generic products.  This  may make it difficult for  us to achieve market acceptance
at desired levels in a timely manner to ensure  viability of  our business.

More established companies may have a competitive advantage  over us due to their  greater  size,

cash flows and institutional experience. Compared to us, many of our  competitors  may have
significantly greater financial, technical and human resources.

As a result of these factors, our competitors may obtain regulatory approval of their products
before we are able to obtain patent protection or  other  intellectual property  rights which  will  limit  our
ability to develop or commercialize our product candidates. Our competitors may  also develop drugs
that are safer, more effective, more widely  used  and cheaper than ours, and may also  be  more
successful than us in manufacturing and marketing their products. These appreciable  advantages  could
render our product candidates obsolete  or non-competitive before we can recover the expenses of
development and commercialization.

Mergers and acquisitions in the pharmaceutical and biotechnology industries  may result in even
more resources being concentrated among a smaller number of  our competitors. Smaller  and other
early-stage companies may also prove to be significant  competitors, particularly through  collaborative
arrangements with large and established  companies. These third parties compete with us in recruiting

49

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

If we breach the license agreements or fail to negotiate new agreements pertaining to our product  candidates,
we could lose the ability to continue the  development  and potential commercialization  of  these product
candidates.

In January 1999, we entered into an  agreement with  Temple, as  subsequently amended, to obtain
an exclusive, world-wide license to make, have made,  use, sell, offer  for  sale and import  several classes
of novel compounds, including all three of our clinical-stage product candidates.  In  May 2010,  we
entered into an agreement with Mount Sinai  School of  Medicine, as subsequently amended,  giving us
the option to exclusively negotiate licenses related to certain compounds. If we fail to meet our
obligations under these license agreements  or if  we fail to negotiate future license agreements, our
rights under the licenses could be terminated, and upon the effective date of such  termination,  our
right to use the licensed technology would terminate. While we would expect to exercise all rights and
remedies available to us, including attempting to cure any breach by us, and otherwise seek  to  preserve
our  rights under the patents and other technology licensed to us,  we  may not be able  to  do  so in a
timely manner, at an acceptable cost or at all. Any uncured,  material  breach  under the  license
agreement could result in our loss of exclusive rights and may lead to a complete termination  of our
product  development and any commercialization  efforts for the applicable product  candidates.

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 testing  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. Product  liability claims may be brought against  us  by  subjects enrolled  in
our  clinical trials, patients, healthcare  providers or  others using, administering  or selling  our  products.
If we  cannot successfully defend ourselves  against claims that our product  candidates or products
caused injuries, we could incur substantial liabilities.  Regardless of  merit or eventual  outcome, liability
claims may result in:

(cid:127) decreased demand for any product candidates or products that  we may develop;

(cid:127) termination of clinical trial sites or  entire trial programs;

(cid:127) injury to our reputation and significant negative media  attention;

(cid:127) withdrawal of clinical trial participants;

(cid:127) significant costs to defend the related  litigation;

(cid:127) substantial monetary awards to trial subjects or  patients;

(cid:127) loss of revenue;

(cid:127) diversion of management and scientific  resources from our business operations; and

(cid:127) the inability to commercialize any  products that we  may develop.

We  currently hold $10.0 million in product liability insurance coverage in the  aggregate, which may
not be adequate to cover all liabilities  that we may incur. Insurance coverage is increasingly expensive.
We  may not be able to maintain insurance coverage at  a reasonable cost  or in an  amount  adequate to
satisfy any liability that may arise. We intend to expand  our insurance coverage for products  to  include
the sale of commercial products if we obtain marketing approval for our product candidates in
development, but we may be unable to obtain  commercially reasonable product liability insurance  for

50

any products  approved for marketing.  Large judgments have been awarded in class  action lawsuits
based on drugs that had unanticipated  side effects.  A successful product liability claim or  series of
claims brought against us, particularly if judgments exceed our  insurance  coverage,  could  decrease our
cash and adversely affect our business.

We will need to grow the size of our organization, and  we may experience difficulties in managing this growth.

As of December 31, 2013, we had 64  employees. As our  development and  commercialization plans

and strategies develop, or as a result  of any future acquisitions,  we will need additional  managerial,
operational, sales, marketing, financial and other resources. Our management,  personnel and systems
currently in place may not be adequate  to  support  this future growth.  Future growth would impose
significant added responsibilities on members of management,  including:

(cid:127) managing our clinical trials effectively;

(cid:127) identifying, recruiting, training, maintaining,  motivating and integrating additional  employees;

(cid:127) managing our internal development efforts effectively while complying with  our contractual

obligations to licensors, licensees, contractors and other third parties;

(cid:127) improving our managerial, development, operational and finance systems; and

(cid:127) expanding our facilities.

As our operations expand, we will need to manage  additional relationships with various strategic

partners, suppliers and other third parties. Our  future  financial performance and our ability to
commercialize our product candidates and to compete effectively will depend, in  part, on our ability to
manage any future growth effectively. To  that  end, we must  be  able to manage  our development efforts
and clinical trials effectively and hire, train and integrate additional management,  administrative and
sales and marketing personnel. Our failure to accomplish any of these tasks  could  prevent us from
successfully growing our company.

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

We  are highly dependent upon Ramesh Kumar, Ph.D., President and  Chief Executive Officer;

Thomas McKearn, M.D., Ph.D., President,  Research and Development; and Ajay Bansal, Chief
Financial Officer. Although we have employment  agreements with  the persons named above,  these
agreements are at-will and do not prevent  such persons from terminating  their  employment with us at
any time. We do not maintain ‘‘key person’’ insurance for any of our executives or other employees,
other than our President and Chief Executive Officer.  The  loss of the services of any of these persons
could impede the achievement of our research,  development and commercialization objectives.

If we are unable to attract and retain highly  qualified employees, we may not be able to grow effectively.

Our future growth and success depend  on our ability to recruit,  retain, manage and  motivate our
employees. The loss of any member  of  our senior management  team or the inability to hire or  retain
experienced management personnel could  compromise our ability to execute  our business plan and
harm our operating results.

Because of the specialized scientific and managerial nature of  our business, we rely heavily on our
ability to attract and retain qualified  scientific, technical  and managerial personnel.  The competition for
qualified personnel in the pharmaceutical field is intense and  as a  result, we  may be unable to continue
to attract and retain qualified personnel  necessary for  the development of our business.

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We may  engage in future acquisitions that could disrupt  our business,  cause dilution to our stockholders and
harm our financial condition and operating  results.

While we currently have no specific plans  to  acquire any other businesses,  we may,  in the future,
make acquisitions of, or investments  in, companies that  we believe have products or capabilities that
are a strategic or commercial fit with  our  current product  candidates and business or otherwise offer
opportunities for our company. In connection with these acquisitions or  investments, we  may:

(cid:127) issue stock that would dilute our existing stockholders’ percentage of ownership;

(cid:127) incur debt and assume liabilities; and

(cid:127) incur amortization expenses related to intangible  assets or incur  large and  immediate  write-offs.

We  may not be able to complete acquisitions on favorable  terms, if at all. If we do complete an
acquisition, we cannot assure you that  it  will ultimately strengthen our competitive position or  that  it
will be viewed positively by customers, financial  markets  or  investors. Furthermore, future  acquisitions
could pose numerous additional risks to our operations, including:

(cid:127) problems integrating the purchased business, products or technologies;

(cid:127) increases to our expenses;

(cid:127) the failure to discover undisclosed liabilities of the acquired asset or company;

(cid:127) diversion of management’s attention  from their day-to-day responsibilities;

(cid:127) harm to our operating results or financial  condition;

(cid:127) entrance into markets in which we  have  limited  or no  prior experience; and

(cid:127) potential loss of key employees, particularly  those of  the acquired  entity.

We  may not be able to complete any  acquisitions or effectively integrate  the operations, products

or personnel gained through any such  acquisition.

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

Despite the implementation of security  measures, our internal computer systems, and those of our

CROs and other third parties on which we rely, are vulnerable to damage from computer viruses,
unauthorized access, natural disasters,  fire, terrorism, war and telecommunication and electrical
failures. If such an event were to occur and cause interruptions in our  operations,  it could result in a
material disruption of our drug development  programs. For  example,  the loss of clinical trial data from
completed, ongoing or planned clinical trials could result  in delays  in our regulatory  approval efforts
and significantly increase our costs to  recover or  reproduce the data. To the extent  that  any disruption
or security breach results in a loss of or damage  to  our  data  or  applications, or inappropriate disclosure
of confidential or proprietary information,  we could incur liability and the further development of our
product  candidates could be delayed.

If we fail to comply with environmental,  health and safety laws and regulations, we could  become subject to
fines or penalties or incur costs that could have a material adverse  effect on the success  of our business.

We  are subject to numerous environmental, health and safety  laws and regulations, including  those

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

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Although we maintain workers’ compensation insurance to cover  us for costs and expenses  we may

incur due to injuries to our employees resulting from the use of hazardous materials, this insurance
may not provide adequate coverage against potential  liabilities.  We do  not  maintain  insurance for
environmental liability or toxic tort claims  that may be asserted  against us in  connection with  our
storage or disposal of biological or hazardous 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 research, development  or production efforts.  Failure to comply  with these laws and
regulations also may result in substantial  fines, penalties or other  sanctions.

Business disruptions could seriously harm our future  revenues and financial  condition and increase our costs
and expenses.

Our operations could be subject to earthquakes, power shortages, telecommunications failures,
water shortages, floods, hurricanes, typhoons, fires, extreme  weather conditions, medical epidemics and
other natural or manmade disasters or business  interruptions, for which  we are  predominantly
self-insured. The occurrence of any of  these business disruptions could seriously harm our operations
and financial condition and increase our  costs and expenses.  We rely  on third-party manufacturers to
produce our product candidates. Our ability to obtain clinical supplies  of  product candidates  could  be
disrupted if the operations of these suppliers is affected by a man-made or natural disaster  or other
business interruption. The ultimate impact  on us, our significant suppliers and our  general
infrastructure of being consolidated in  certain geographical areas is  unknown, but our operations  and
financial condition could suffer in the event of  a major earthquake, fire or other  natural disaster.

We are relying on the FDA’s ‘‘Animal Efficacy Rule’’ to demonstrate  efficacy of  recilisib, which could result in
delays or failure at any stage of recilisib’s development process, increase our development costs  and adversely
affect the commercial prospects of recilisib.

Because humans are not normally exposed to radiation and it would  be  unethical to expose
humans to such, effectiveness of recilisib cannot be demonstrated  in humans, but instead,  under the
FDA’s ‘‘Animal Efficacy Rule,’’ can be  demonstrated, in part, by utilizing animal models.  This effect has
to be demonstrated in more than one  animal species expected to be predictive of  a response in
humans, but an effect in a single animal species  may be acceptable  if that animal model is sufficiently
well-characterized for predicting a response in humans. The animal study endpoint must be clearly
related to the desired benefit in humans  and  the information obtained from animal studies  must  allow
selection of an effective dose in humans.  Safety may be demonstrated  in human studies.

We  may not be able to sufficiently demonstrate the animal correlation to the satisfaction  of the
FDA, as these correlates are difficult  to  establish and  are often unclear.  The FDA may decide that our
data are insufficient for approval and  require additional preclinical, clinical or other studies, refuse to
approve recilisib, or place restrictions on our ability to commercialize  recilisib. Furthermore, other
countries, at this time, have not established criteria for review and approval of  these types of products
outside their normal review process. There is no ‘‘Animal  Efficacy  Rule’’ equivalent in countries other
than the United States, and consequently  there can  be  no assurance that we  will  be  able to make a
submission for marketing approval in foreign countries based on such  animal data.

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Risks Related to Our Dependence on Third  Parties

We rely on third parties to conduct our preclinical and clinical trials.  If these  third  parties do not successfully
carry  out their contractual duties or meet  expected deadlines, we  may not be able  to obtain  regulatory
approval for or commercialize our product candidates.

We  have relied upon and plan to continue to rely upon third-party  CROs  to  monitor and manage

data for our ongoing preclinical and  clinical programs. We rely on these parties  for execution of  our
preclinical and clinical trials, and we  control only some aspects of their activities. Nevertheless, we  are
responsible for ensuring that each of  our studies  is conducted in accordance with the applicable
protocol and legal, regulatory and scientific standards, and our reliance on the CROs does not relieve
us of our regulatory responsibilities. We also rely on third parties  to  assist  in conducting our  preclinical
studies in accordance with Good Laboratory Practices,  or GLP, and  the Animal Welfare Act
requirements. We and our CROs are  required to comply with  federal  regulations and current Good
Clinical Practices, or GCP, which are international  standards meant to protect the rights and  health  of
patients that are enforced by the FDA,  the  Competent Authorities  of the Member  States of the
European Economic Area, or EEA, and comparable foreign regulatory authorities for all of our
products in clinical development. Regulatory authorities enforce GCP through periodic  inspections of
trial sponsors, principal investigators and trial sites. If we or any of our  CROs fail to comply with
applicable GCP, the clinical data generated in our  clinical trials may be deemed unreliable and  the
FDA or comparable foreign regulatory authorities  may  require us to perform additional  clinical trials
before approving our marketing applications. We cannot assure you that upon inspection by a  given
regulatory authority, such regulatory  authority  will determine that any of our clinical trials comply  with
GCP requirements. In addition, our  clinical  trials must  be  conducted with product  produced under
cGMP requirements. Failure to comply with  these  regulations may require  us to repeat  preclinical and
clinical trials, which would delay the regulatory approval  process.

Our CROs are not our employees, and except for  remedies available to us under our agreements

with such CROs, we cannot control whether or  not  they devote sufficient  time and resources to our
ongoing clinical, nonclinical and preclinical  programs. If CROs do not successfully carry  out their
contractual duties or obligations or meet expected deadlines 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, our clinical  trials may be extended, delayed or terminated  and we
may not be able to obtain regulatory approval for or successfully commercialize our product  candidates.
As a result, our results of operations and the  commercial prospects for  our product candidates would
be harmed, our costs could increase and our  ability  to  generate  revenues  could be delayed.

Because we have relied on third parties, our internal capacity to perform these functions  is limited.

Outsourcing these functions involves risk  that third parties may  not perform to our standards,  may not
produce results in a timely manner or  may fail to perform at  all. In  addition, the  use of third-party
service providers requires us to disclose  our proprietary information to these  parties, which  could
increase the risk that this information  will be misappropriated. We  currently have a small number of
employees, which limits the internal resources we  have available to identify and  monitor our third-party
providers. To the extent we are unable  to  identify and successfully manage the performance of third-
party service providers in the future, our business may be adversely affected. Though we  carefully
manage our relationships with our CROs,  there  can be no assurance that  we will not encounter
challenges or delays in the future or that  these delays  or challenges  will not have  a material adverse
impact on our business, financial condition and prospects.

If we lose our  relationships with CROs,  our  drug development efforts could be delayed.

We  rely  on third-party vendors and CROs for  preclinical studies  and clinical trials  related to our

drug development efforts. Switching or  adding additional CROs would involve  additional cost and

54

requires management time and focus.  Our CROs have  the right to terminate their agreements  with us
in the event of an uncured material breach. In addition,  some of our CROs  have an ability to terminate
their respective agreements with us if  it  can be reasonably  demonstrated that the safety  of  the subjects
participating in our clinical trials warrants  such termination, if we make a general assignment  for the
benefit of our creditors or if we are liquidated. Identifying, qualifying and managing performance of
third-party service  providers can be difficult, time consuming and cause delays in  our  development
programs. In addition, there is a natural transition  period when a new CRO commences work and the
new CRO may not provide the same  type or level of services as the  original  provider.  If any  of our
relationships with our third-party CROs terminate, we may not  be  able  to enter into arrangements with
alternative CROs or to do so on commercially reasonable terms.

We have  limited experience manufacturing  our product candidates on a  large clinical or commercial scale and
have no  manufacturing facility. We are  dependent on third-party manufacturers for the manufacture of our
most advanced product candidate as well  as on  third parties for our  supply  chain,  and if we experience
problems with any third parties, the manufacturing  of our product  candidates or products could be delayed.

We  do not own or operate facilities for the manufacture  of our  product candidates. We currently
have no plans to build our own clinical  or commercial scale manufacturing capabilities. We currently
rely on a single source contract manufacturing organization, or CMO, for  the chemical  manufacture of
active  pharmaceutical ingredient for  rigosertib, another  CMO for  the  production  of  the rigosertib
intravenous formulation, and a third CMO for the  production of the rigosertib oral formulation for
Phase 3 clinical trials. To meet our projected needs for  clinical supplies  to support our activities
through regulatory approval and commercial manufacturing, the CMOs  with whom we currently work
will need to increase the scale of production. We may need  to  identify  additional CMOs for continued
production of supply for our product candidates. In addition,  regulatory authorities  enforce  cGMP
through periodic inspections of active  pharmaceutical ingredient, or API and drug product
manufacturing sites, quality control contract  laboratories and  distribution  centers.  If we  or our  CMO
fail to comply with applicable cGMP,  the manufacturing data generated  and subsequent  API lots and
drug product batches in our supply chain  may  be  deemed unreliable and the  FDA or comparable
foreign regulatory  authorities may require us  to  perform additional API  and  drug product
manufacturing before approving our marketing applications We have not yet identified alternate
suppliers in the event the current CMOs  we utilize  are unable to scale  production,  or if we otherwise
experience any problems with them.  Although alternative third-party suppliers with the  necessary
manufacturing and regulatory expertise  and facilities exist,  it could be expensive  and take a significant
amount of time to  arrange for alternative  suppliers.  If we are  unable  to  arrange for  alternative third-
party manufacturing sources, or to do  so on  commercially reasonable  terms or in  a timely manner, we
may not be able to complete development  of our product  candidates, or market or  distribute them.

Reliance on third-party manufacturers entails risks to which we would  not be subject if we

manufactured product candidates or products ourselves, including  reliance on  the third  party for
regulatory compliance and quality assurance, the possibility of breach of the manufacturing  agreement
by the third party because of factors  beyond  our control, including a failure to synthesize and
manufacture our product candidates or  any products we may eventually  commercialize in accordance
with our specifications, and the possibility  of termination or nonrenewal of the  agreement by the third
party, based on its own business priorities, at a time that is costly  or  damaging to us. In addition, the
FDA and other regulatory authorities require that our product  candidates and any products  that  we
may eventually commercialize be manufactured according  to  cGMP and similar foreign  standards. Any
failure by our third-party manufacturers to comply with cGMP or  failure to scale up  manufacturing
processes, including any failure to deliver sufficient quantities of product  candidates in a timely  manner,
could lead to a delay in, or failure to obtain, regulatory  approval of  any of our product candidates. In
addition, such failure could be the basis  for the FDA to issue a warning letter, withdraw  approvals for
product  candidates previously granted  to  us, or take other regulatory or legal action, including recall or

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seizure of outside supplies of the product candidate, total or  partial suspension of  production,
suspension of ongoing clinical trials, refusal to approve pending applications or supplemental
applications, detention or product, refusal  to permit the import  or export of products, injunction,  or
imposing civil and criminal penalties.

Any significant disruption in our supplier relationships  could harm our business. Any significant

delay in the supply of a product candidate or its  key  materials for an ongoing clinical study could
considerably delay completion of our clinical studies,  product testing and potential regulatory  approval
of our product candidates. If our manufacturers or  we are unable  to  purchase these key materials after
regulatory approval has been obtained for  our product candidates, the  commercial launch of our
product  candidates would be delayed or  there would be a shortage in  supply, which would impair  our
ability to generate revenues from the sale of our product  candidates.

We have  entered into collaboration agreements with SymBio Pharmaceuticals Limited  and  Baxter
Healthcare SA for rigosertib development  and commercialization in certain territories and we may  elect to
enter into additional licensing or collaboration agreements  to partner rigosertib  in territories  currently retained
by  us. Our dependence on such relationships  may adversely affect our  business.

Because we have limited resources, we  seek to enter into, and in  the past we have entered into,
collaboration agreements with other  pharmaceutical companies  and may elect to enter  into  more of
these agreements in the future. In July 2011, we entered into a license agreement with SymBio
Pharmaceuticals Limited, or SymBio,  as  subsequently amended, granting an exclusive, royalty-bearing
license for the development and commercialization of rigosertib in  Japan and  Korea. In September
2012, we entered into a development  and  license agreement  with Baxter Healthcare  SA, or  Baxter, a
subsidiary of Baxter International Inc.,  granting an exclusive, royalty-bearing  license for the
development and commercialization of rigosertib in Europe. In  December 2012, we also entered into a
collaboration agreement with GVK Biosciences Private Limited  for the  further development  of  two of
our  preclinical oncology programs. Any  failure by our partners to perform their obligations or  any
decision by our partners to terminate these  agreements could negatively impact  our  ability  to
successfully develop, obtain regulatory  approvals for  and commercialize the applicable product
candidate. In addition, any termination  of  our  collaboration agreements will terminate  the funding we
may receive under the relevant collaboration agreement  and  may  impair our ability to fund further
development efforts and our progress  in our development  programs.

Our commercialization strategy for rigosertib  in territories currently  retained by us may  depend  on

our  ability to enter into agreements with collaborators to obtain assistance and funding for  the
development and potential commercialization of  rigosertib  in those territories. Despite  our  efforts, we
may be unable to secure additional collaborative licensing or other arrangements  that  are necessary for
us to further develop and commercialize rigosertib.  Supporting diligence activities conducted by
potential collaborators and negotiating the  financial and other  terms of a collaboration agreement are
long and complex processes with uncertain results.  Even if we are successful in entering  into  one or
more collaboration agreements, collaborations may involve greater uncertainty for us, as we have less
control over certain aspects of our collaborative programs than  we  do over  our  proprietary
development and commercialization programs. We may determine that continuing a  collaboration  under
the terms provided is not in our best  interest, and we may terminate  the  collaboration. Our
collaborators could delay or terminate their agreements, and as a result rigosertib may never  be
successfully commercialized.

Further, our future collaborators may develop alternative products or  pursue  alternative

technologies either on their own or in  collaboration with  others, including  our  competitors, and  the
priorities or focus  of our collaborators may shift such that rigosertib receives  less  attention  or resources
than we would like, or they may be terminated  altogether. Any such actions  by  our collaborators may
adversely affect our business prospects  and ability to earn  revenues.  In addition, we could have disputes

56

with our current or future collaborators,  such as  the interpretation of terms in our agreements.  Any
such disagreements could lead to delays  in the development  or  commercialization of rigosertib or  could
result in time-consuming and expensive  litigation or arbitration, which  may not be resolved in  our
favor.

With respect to our programs that are currently not the subject  of  collaborations, we may enter
into agreements with collaborators to  share in  the burden  of  conducting clinical  trials, manufacturing
and marketing these product candidates.  In addition, our ability to develop additional proprietary
compounds may depend on our ability  to  establish and maintain licensing arrangements  or other
collaborative arrangements with the holders of proprietary rights to such compounds.  We may not be
able to establish such arrangements on favorable terms  or at  all, and our future collaborative
arrangements may not be successful.

Risks Related to Our Intellectual Property

If we are unable to protect our intellectual  property rights, our competitive  position could be  harmed.

We  depend on our ability to protect our proprietary  technology. We  rely on trade  secret,  patent,
copyright and trademark laws, and confidentiality,  licensing and other agreements with employees  and
third parties, all of which offer only limited  protection. Our commercial success will depend  in large
part on our ability to obtain and maintain  patent protection in the United States and other countries
with respect to our proprietary technology  and  products. Where we have  the right to do so under  our
license agreements, we seek to protect our proprietary  position by  filing patent applications in  the
United States and abroad related to our novel technologies and products  that are important to our
business. The patent positions of biotechnology  and  pharmaceutical  companies generally are highly
uncertain, involve complex legal and  factual questions  and have  in recent years been the  subject of
much  litigation. As a result, the issuance, scope, validity, enforceability and commercial  value of our
patents, including those patent rights licensed to us by third  parties, are  highly uncertain.

The steps we have taken to protect our proprietary  rights may not be adequate to preclude
misappropriation of our proprietary information or infringement  of  our intellectual property  rights,
both inside and outside the United States.  The rights already  granted  under  any of our currently issued
patents and those that may be granted  under future issued patents may not provide  us with the
proprietary protection or competitive  advantages we are seeking. If we are unable to obtain and
maintain patent protection for our technology and products, or  if the scope of the patent protection
obtained is not sufficient, our competitors  could  develop and  commercialize  technology and products
similar or superior to ours, and our ability to successfully  commercialize our technology  and products
may be adversely affected.

With respect to patent rights, we do  not know whether  any of the  pending  patent  applications  for

any of our licensed compounds will result in the issuance of patents  that protect our technology or
products, or if any of our issued patents  will  effectively prevent others from commercializing
competitive technologies and products. Our  pending  applications cannot be enforced  against third
parties practicing the technology claimed  in  such applications unless and until a patent issues from such
applications. Further, the examination  process may  require us  or our licensor to narrow the claims for
our  pending patent applications, which  may limit the  scope  of patent protection that may  be  obtained if
these applications issue. Because the  issuance  of a patent is not  conclusive  as to its inventorship, scope,
validity or enforceability, issued patents that we own or  have licensed from  third  parties may be
challenged in the courts or patent offices  in the  United States and abroad. Such challenges may  result
in the loss of patent protection, the narrowing of claims in  such patents or  the invalidity or
unenforceability of such patents, which  could limit  our ability to stop others  from using or
commercializing similar or identical technology and products, or limit  the  duration of the  patent
protection for our technology and products. Protecting against  the unauthorized  use of our patented

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technology, trademarks and other intellectual property rights is expensive, difficult and may in some
cases not be possible. In some cases,  it  may  be  difficult or impossible to detect third-party infringement
or misappropriation of our intellectual  property rights, even in relation to issued patent claims,  and
proving any such infringement may be  even more difficult.

We could be required to incur significant expenses to perfect our intellectual  property rights, and  our
intellectual property rights may be inadequate  to protect  our competitive position.

The patent prosecution process is expensive and time-consuming, and we  or our licensors may not
be able to file and prosecute all necessary or desirable patent applications  at a reasonable  cost or in  a
timely manner. It is also possible that  we or  our licensors will fail  to  identify patentable  aspects of
inventions made in the course of our development  and  commercialization activities before it is  too late
to obtain patent protection on them. Further, given the  amount  of  time  required for the development,
testing and regulatory review of new product  candidates, patents protecting  such candidates  might
expire before or shortly after such candidates are  commercialized.  We  expect to seek  extensions of
patent terms in the United States and,  if  available, in  other  countries where we  are prosecuting patents.
In the United States, the Drug Price  Competition and Patent Term Restoration Act of 1984 permits a
patent term extension of up to five years beyond the  expiration of the patent. However,  the applicable
authorities, including the FDA in the United  States,  and any equivalent regulatory authority in other
countries, may not agree with our assessment of whether such extensions  are  available,  and may  refuse
to grant extensions to our patents, or may  grant more  limited  extensions than  we request. If this  occurs,
our  competitors may be able to take advantage  of our investment in  development and  clinical trials  by
referencing our clinical and preclinical  data and launch their product earlier than might  otherwise be
the case. 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. The laws of foreign countries  may  not  protect our rights to the same extent as the laws of
the United States, and these foreign laws  may also be subject to change. For  example, methods of
treatment and manufacturing processes  may not be patentable  in certain  jurisdictions. 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 be certain that we or our licensors were the first to make
the inventions claimed in our owned or  licensed patents or  pending  patent  applications,  or that we  or
our  licensors were the first to file for patent protection of such  inventions.

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 will be prosecuted and  may also affect
patent litigation. In particular, under the Leahy-Smith Act,  the United States  transitioned  in March
2013 to a ‘‘first to file’’ system in which  the first  inventor to  file  a patent application will be entitled to
the patent. Third parties are allowed  to  submit  prior art before the  issuance  of  a patent by the U.S.
Patent and Trademark Office, or the USPTO, and may become involved in opposition, derivation,
reexamination, inter-partes review or  interference proceedings challenging our patent rights or  the
patent rights of others. An adverse determination in  any  such submission, proceeding  or litigation could
reduce the scope of, or invalidate, our patent rights,  which could adversely affect our competitive
position.

The USPTO 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, did not become  effective until March  16, 2013.

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Accordingly, 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.

Obtaining and maintaining our patent  protection depends on compliance with  various procedural, document
submissions, 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 on any issued patent are due to be paid to the  USPTO and foreign

patent agencies in several stages over  the lifetime of the patent. The  USPTO and various foreign
governmental patent agencies require  compliance with a  number  of procedural, documentary, fee
payment and other similar provisions during  the patent application process.  While  an inadvertent  lapse
can in many cases be cured by payment of a late fee or by  other means in  accordance  with the
applicable rules, there are situations  in which  noncompliance can result  in abandonment or  lapse of the
patent or patent application, resulting in partial or  complete  loss of  patent  rights in  the relevant
jurisdiction. Non-compliance events that  could result in abandonment or lapse of a patent or  patent
application include, but are not limited to, failure to respond to official actions  within prescribed time
limits, non-payment of fees and failure to properly  legalize and submit formal documents.  If we  or our
licensors fail to maintain the patents  and patent applications covering our  product candidates, our
competitive position would be adversely affected.

We may  become involved in lawsuits to protect  or enforce our intellectual property, which  could be expensive,
time consuming and unsuccessful.

Competitors may infringe our patents or  misappropriate or  otherwise violate our intellectual
property rights. To counter infringement  or unauthorized  use, litigation may  be  necessary  in the future
to enforce or defend our intellectual property rights, to protect our  trade secrets or to determine the
validity and scope of our own intellectual property rights  or the proprietary rights of others.  This can
be expensive and time consuming. Many of  our  current and potential competitors have  the ability to
dedicate substantially greater resources  to  defend  their  intellectual property rights than  we can.
Accordingly, despite our efforts, we may not be able  to  prevent third parties  from infringing upon or
misappropriating our intellectual property. Litigation  could result in  substantial costs and  diversion of
management resources. In addition, in  an infringement proceeding, a  court may decide that a patent
owned by or licensed to us is invalid or unenforceable, or may 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, held unenforceable or interpreted  narrowly.  Furthermore,  because of the substantial
amount of discovery required in connection with intellectual property litigation, there is a risk that
some of our confidential information  could be compromised  by disclosure  during  this  type of litigation.

Third parties may initiate legal proceedings  alleging  that we are infringing  their intellectual property rights,
the outcome of which would be uncertain  and could harm  our  business.

Our commercial success depends upon  our  ability and the  ability of our collaborators to develop,
manufacture, market and sell our product candidates, and to use  our proprietary technologies without
infringing the proprietary rights of third parties.  We may become party to, or threatened with, future
adversarial proceedings or litigation regarding intellectual property rights  with respect  to  our  products
and technology, including interference  or  derivation proceedings  before  the USPTO. 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 commercializing  our  products and

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technology. However, we may not be  able to obtain any  required license on commercially  reasonable
terms or at all. Even if we are able to  obtain  a license, it may  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, in  any such
proceeding or litigation, we could be found liable for monetary damages. 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.  Any claims by third  parties that we  have
misappropriated their confidential information or trade secrets  could have a similar negative impact on
our  business.

We may  be subject to claims that our employees  have wrongfully used  or disclosed alleged trade secrets  of  their
former employers.

Many of our employees, including our  senior management, were previously employed at other
biotechnology or pharmaceutical companies, including our competitors or potential competitors.  Some
of these  employees, including each member of our senior management,  executed  proprietary rights,
non-disclosure and non-competition agreements in connection  with such  previous employment.
Although we try to ensure that our employees do not use  the proprietary information  or know-how  of
others in their work for us, we may be  subject to claims  that we or these employees have used  or
disclosed intellectual property, including  trade secrets or other  proprietary information, of any such
employee’s former employer. We are not aware of any threatened or pending claims related  to  these
matters or concerning the agreements  with  our  senior management, but in the future  litigation may be
necessary to defend against such claims.  If we fail  in defending any such claims, in  addition to paying
monetary damages, we may lose valuable  intellectual  property rights or personnel.  Even if we are
successful in defending against such claims,  litigation could  result  in substantial costs and be a
distraction to management.

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

Even if resolved in our favor, litigation or  other  legal proceedings relating to intellectual property

claims may cause us to incur significant expenses, and could distract our technical  and management
personnel from their normal responsibilities.  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 market
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.
Uncertainties resulting from the initiation and continuation of patent litigation or other  proceedings
could compromise our ability to compete in the  marketplace.

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 products,  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, CMOs, consultants,  advisors and  other  third  parties. We
also generally enter into confidentiality and invention or patent  assignment  agreements with our

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employees and consultants. Despite these efforts, 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  both within and outside the  United States may  be  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  such competitor from
using that technology or information  to  compete with  us, which could harm  our  competitive position.

Although we expect all of our employees to assign  their inventions  to  us, and  all  of our  employees,

consultants, advisors and any third parties  who  have access to our  proprietary know-how, information
or technology to enter into confidentiality  agreements, we cannot provide any assurances that all such
agreements have been duly executed or  that our trade secrets and  other confidential proprietary
information will not be disclosed or that competitors  will not otherwise gain access to our trade secrets
or independently develop substantially equivalent  information and techniques. Additionally, if the steps
taken to maintain our trade secrets are deemed  inadequate, we  may have insufficient recourse against
third parties for misappropriating the trade secret, In addition, others may  independently  discover our
trade secrets and proprietary information. For example, the FDA, as  part of  its Transparency Initiative,
is currently considering whether to make  additional  information  publicly available  on a  routine basis,
including information that we may consider to be trade secrets or  other proprietary information, and it
is not clear at the present time how the FDA’s  disclosure policies may change in  the future, if at all.

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

Filing,  prosecuting and defending patents on all of our product candidates throughout the world

would be prohibitively expensive. Competitors may use  our  technologies in  jurisdictions where  we have
not obtained patent protection to develop their own products, and may export otherwise  infringing
products to territories where we have  patent protection, but where  enforcement  is not as strong as  that
in the United States. These products  may  compete with  our products in  jurisdictions where  we do not
have any issued patents and our patent  claims  or other intellectual property rights  may not be effective
or sufficient to prevent them from so competing.

Many companies have encountered significant  problems in protecting and defending intellectual

property rights in foreign jurisdictions.  The  legal systems  of certain countries, particularly certain
developing countries, do not favor the  enforcement of patents and other intellectual property
protection, particularly those relating to biopharmaceuticals, which could make it  difficult for  us  to  stop
the infringement of our patents or marketing of competing products in violation of our proprietary
rights generally. Proceedings to enforce our patent rights in foreign jurisdictions  could  result in
substantial cost and divert our efforts and  attention from other aspects of our  business.

Intellectual property rights do not necessarily address  all potential threats to our competitive advantage.

The degree of future protection afforded by our intellectual property rights is uncertain  because

intellectual property rights have limitations, and may not adequately protect our business, or permit us
to maintain our competitive advantage. The following examples are illustrative:

(cid:127) Others may be able to make compounds that are  the same as or similar to our product

candidates but that are not covered by the claims of the  patents that we own or have exclusively
licensed.

(cid:127) We or our licensors or any strategic partners might  not  have been  the first to make  the

inventions covered by the issued patent or pending patent application that we  own or have
exclusively licensed.

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(cid:127) We or our licensors or any strategic partners might  not  have been  the first to file patent

applications covering certain of our inventions.

(cid:127) Others may independently develop similar or  alternative  technologies or  duplicate  any of our

technologies without infringing our intellectual  property  rights.

(cid:127) It is possible that our pending patent applications will not lead to issued patents.

(cid:127) Issued patents that we own or have exclusively  licensed  may  not provide us with any  competitive

advantages, or may be held invalid or unenforceable, as  a result  of legal challenges by our
competitors.

(cid:127) Our competitors might conduct research and development activities in the United States and

other countries that provide a safe harbor from  patent  infringement claims for certain research
and development activities, as well as in  countries where we  do not  have patent rights  and then
use the information learned from such  activities to develop competitive products for  sale in our
major commercial markets.

(cid:127) We may not develop additional proprietary technologies that  are  patentable.

(cid:127) The patents of others may have an adverse effect on our business.

Risks Related to Ownership of Our Common Stock

The trading market in our common stock  has been extremely limited and substantially  less liquid than  the
average trading market for a stock quoted  on the  NASDAQ Global  Market.

Since our initial listing on the NASDAQ Global Market  on July  25, 2013,  the trading  market in
our  common stock has been limited and  substantially less  liquid than  the average trading market for
companies quoted on the NASDAQ Global Market. The  quotation  of  our  common stock on  the
NASDAQ Global Market does not assure that a meaningful, consistent and  liquid trading market
currently exists. We cannot predict whether  a more active market for our common stock will develop in
the future. An absence of an active trading  market  could  adversely  affect  our stockholders’ ability  to
sell our common stock at current market prices in short time periods, or  possibly at all. Additionally,
market visibility for our common stock may be limited and such lack of visibility  may have a depressive
effect on the market price for our common stock. As of December 31,  2013, approximately  42% of our
outstanding shares of common stock  was held by our  officers, directors,  beneficial owners  of  5% or
more of our capital stock and their respective affiliates, which adversely affects the  liquidity of the
trading market for our common stock,  in  as much as  federal  securities laws restrict  sales of  our shares
by these stockholders. If our affiliates continue to hold their  shares of common stock,  there will be
limited trading volume in our common  stock, which may make  it more  difficult  for investors to sell
their shares or increase the volatility  of  our stock  price.

Our share price may be volatile, which could  subject us to  securities class action litigation and result  in
substantial losses to our stockholders.

The trading price of our common stock is highly  volatile  and could be subject to wide  fluctuations

in response to various factors, some of which  are beyond our control. Since our initial  listing on the
NASDAQ Global Market on July 25,  2013 through December 31, 2013,  the price  of  our  common stock
on the NASDAQ Global Market has ranged from $11.31  per  share to $31.13  per  share. In addition to
the factors discussed in this ‘‘Risk Factors’’ section and  elsewhere in this Annual Report, these factors
include:

(cid:127) results of clinical trials of our product candidates  or those of our competitors;

(cid:127) regulatory actions with respect to our  products or our  competitors’  products;

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(cid:127) actual or anticipated changes in our  growth rate relative to our competitors;

(cid:127) announcements  by us or our competitors  of significant  acquisitions, strategic partnerships, joint

ventures, collaborations or capital commitments;

(cid:127) the success of competitive products  or technologies;

(cid:127) regulatory or legal developments in the United  States and other  countries;

(cid:127) developments or disputes concerning patent applications, issued patents or other  proprietary

rights;

(cid:127) the recruitment or departure of key personnel;

(cid:127) the level of expenses related to any  of our product candidates or clinical development programs;

(cid:127) the results of our efforts to in-license  or acquire additional  product candidates or products;

(cid:127) actual or anticipated changes in estimates as to financial results,  development timelines or

recommendations by securities analysts;

(cid:127) variations in our financial results or those  of companies  that are perceived to be similar to us;

(cid:127) fluctuations in the valuation of companies perceived  by  investors  to  be  comparable to us;

(cid:127) share price and volume fluctuations attributable  to  inconsistent trading volume  levels of our

shares;

(cid:127) announcement or expectation of additional  financing efforts;

(cid:127) sales of our common stock by us, our insiders or  our other stockholders;

(cid:127) changes in the structure of healthcare payment  systems;

(cid:127) market conditions in the pharmaceutical and biotechnology sectors; and

(cid:127) general economic, industry and market conditions.

In addition, the stock market in general, and pharmaceutical  and biotechnology  companies in
particular, have experienced extreme  price and volume fluctuations  that have often been unrelated  or
disproportionate to the operating performance  of  these companies. Broad  market and industry factors
may negatively affect the market price of our  common stock, regardless of our actual  operating
performance. The realization of any  of  these risks or any of a broad range of other risks, including
those described in these ‘‘Risk Factors,’’  could  have a dramatic and material  adverse  impact  on the
market price of our common stock.

We may  be subject to securities litigation, which is expensive and could divert  management attention.

The market price of our common stock has been  and  may  continue to be volatile, and  in the past

companies that have experienced volatility in the  market  price of their stock have  been subject to
securities class action litigation. We may  be  the target of this type of litigation  in the future. Securities
litigation against us could result in substantial costs and divert  our management’s attention from  other
business concerns, which could seriously harm our business.

Our principal stockholders and management  own a  significant percentage of  our  stock and will  be able to
exert significant control over matters subject  to  stockholder  approval.

Our executive officers, directors, holders of 5% or more  of  our capital stock and their respective

affiliates together beneficially owned  approximately  42% of our voting  stock  at December 31, 2013.
These stockholders may be able to determine the outcome of all  matters  requiring stockholder
approval. For example, these stockholders  may be able to control elections of directors, amendments of

63

our  organizational documents, or approval of any merger, sale of assets, or other major  corporate
transaction. This may prevent or discourage unsolicited acquisition proposals  or offers  for our common
stock that you may feel are in your best interest as  one of our stockholders. The interests of this group
of stockholders may not always coincide with  your interests  or the interests of  other  stockholders  and
they may act in a manner that advances  their  best interests  and not  necessarily  those of other
stockholders, including seeking a premium value for their common stock, and might affect the
prevailing market price for our common stock.

We are an ‘‘emerging growth company’’  and we intend to  take advantage  of reduced disclosure and governance
requirements applicable to emerging growth companies, which could  result  in our common stock being  less
attractive to investors.

We  are an ‘‘emerging growth company,’’ as  defined in the JOBS Act,  and we intend to take
advantage of certain exemptions from various reporting requirements that are  applicable to other
public companies that are not emerging growth companies including,  but not limited to, not being
required to comply with the auditor  attestation requirements of  Section 404 of  the Sarbanes-Oxley  Act,
reduced disclosure obligations regarding  executive compensation  in our periodic reports and proxy
statements, 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
cannot predict if investors will find our common  stock  less  attractive because  we will 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. We  may take
advantage of these reporting exemptions until we are no longer an emerging growth company,  which in
certain circumstances could be for up to five years.

Our status as an ‘‘emerging growth company’’  under the JOBS Act  may make  it more difficult to raise capital
as and when we need it.

Because of the exemptions from various reporting  requirements  provided to us as  an ‘‘emerging
growth company’’ we may be less attractive  to  investors  and  it may be difficult for us to raise additional
capital as and when we need it. Investors may be unable to compare our business with  other  companies
in our industry if they believe that our  financial accounting  is not as  transparent as other companies in
our  industry. If we are unable to raise  additional capital as  and  when we need  it, our financial
condition and results of operations may  be  materially and  adversely affected.

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

The Sarbanes-Oxley Act requires, among other things, that  we maintain effective internal controls
for financial reporting and disclosure  controls and procedures. Commencing with our annual report on
Form 10-K for the year ending December  31, 2014, we will be required,  under Section  404 of the
Sarbanes-Oxley Act, to furnish a report by management  on, among other things, the effectiveness of
our  internal control over financial reporting. This assessment will  need to include  disclosure of any
material weaknesses identified by our management in our internal control over  financial reporting.  A
material weakness is a deficiency, or combination  of  deficiencies, in internal  control over financial
reporting that results in more than a reasonable possibility that a material misstatement of annual  or
interim financial statements will not be prevented  or detected  on a timely  basis. Section  404 of the
Sarbanes-Oxley Act also generally requires an attestation from  our independent registered public
accounting firm on the effectiveness  of  our internal control over financial  reporting. However,  for as
long as we remain an ‘‘emerging growth  company’’ as defined in  the JOBS Act, we  intend to utilize the
provision  exempting us from the requirement  that our  independent registered public accounting firm
provide an attestation on the effectiveness of our internal  control over  financial reporting.

64

Our compliance with Section 404 will require  that we incur  substantial accounting expense and
expend significant management efforts.  We  currently do  not  have an internal audit group, and we  will
need to hire additional accounting and financial staff with appropriate public company  experience  and
technical accounting knowledge, and compile the system  and process documentation necessary to
perform the evaluation needed to comply  with Section 404.  We may not be able to complete our
evaluation, testing and any required  remediation  in a timely fashion. During the  evaluation and  testing
process, if we identify one or more material weaknesses in our internal control over financial reporting,
we will be unable to assert that our internal  control  over financial reporting  is effective. We cannot
assure you that there will not be material  weaknesses  or significant deficiencies  in our internal control
over financial reporting in the future. Any  failure to maintain internal control over  financial  reporting
could severely inhibit our ability to accurately report our financial condition, results of operations or
cash flows. If we are unable to conclude  that our internal control over financial  reporting is effective,
or if our independent registered public accounting  firm  determines we have  a material weakness  or
significant deficiency in our internal control over  financial reporting once  that  firm  begins its
Section 404 audits of internal control over financial reporting, we could lose investor confidence in  the
accuracy and completeness of our financial reports, the market price  of  our common stock could
decline,  and we could be subject to sanctions or investigations  by the NASDAQ  Stock Market, the  SEC
or other  regulatory authorities. Failure  to  remedy any material weakness in our internal control over
financial reporting, or to implement or  maintain other effective control systems required of public
companies, could also restrict our future  access to the  capital markets.

If we are unable to successfully remediate  the existing material weakness  in our  internal control  over financial
reporting, the accuracy and timing of our  financial reporting may be  adversely affected.

In preparing our consolidated financial  statements as of and for  the year  ended December 31,

2012, we and our independent registered public accounting firm  identified  control  deficiencies in the
design and operation of our internal control over financial  reporting  that together constituted  a
material weakness in our internal control  over financial  reporting. A material weakness is  a deficiency,
or a combination of deficiencies, in internal  control over financial reporting such that there  is a
reasonable possibility that a material misstatement of our financial statements will not be prevented or
detected on a timely basis. The material weakness identified  was that  we  did not have sufficient
financial reporting and accounting staff  with  appropriate  training in  GAAP  and SEC  rules and
regulations with respect to financial reporting.  As such,  our controls over financial reporting were not
designed or operating effectively, and as  a result  there were  adjustments required in connection  with
closing our books and records and preparing our 2012 consolidated  financial  statements.

We  have discussed this material weakness with our  independent registered  public accounting  firm
and our Audit Committee. To remediate,  this material weakness, we have expanded our staff  by  hiring
a Chief Financial Officer, a Director of  Financial Reporting and a Vice President of Financial Planning
and Accounting, each with prior public  company financial reporting experience. We have also  hired
additional finance and accounting personnel with appropriate training to build our financial
management and reporting infrastructure.  We have initiated processes  to  further develop and  document
our  accounting policies and financial  reporting procedures and to implement  additional internal
controls. Although, we believe we have  made improvements in our  disclosure  controls and  procedures,
as of  our December 31, 2013 financial closing process,  we had not yet fully  remediated the material
weakness discussed above. In addition,  we  cannot provide assurance that we  have identified all of our
existing material weaknesses, or that  we  will  not  in the future have additional material weaknesses.

We  have not yet remediated the material  weakness  described above, and the remediation  measures
that we have implemented and intend to implement may be insufficient to address our existing material
weakness or to identify or prevent additional material weaknesses. If we  fail  to  remediate the  material
weakness or to meet the demands that  will  be  placed upon us  as a public company, including the

65

requirements of the Sarbanes-Oxley Act, we may be unable to accurately report our financial results,  or
report them within the timeframes required by law or  stock exchange  regulations. Failure to comply
with Section 404 of the Sarbanes-Oxley  Act could  also potentially  subject us to sanctions  or
investigations by the SEC or other regulatory authorities. There is no  assurance that we  will  be  able to
remediate the material weakness in a timely manner, or  at  all, or that  in the  future, additional material
weaknesses will not exist or otherwise be discovered. If our efforts  to  remediate the material weakness
identified are not successful, or if other  material weaknesses or other deficiencies occur, our ability to
accurately and timely report our financial  position could be impaired, which could result in late filings
of our annual and quarterly reports under  the Exchange Act, restatements  of  our  consolidated  financial
statements, a decline in our stock price,  suspension or  delisting of our  common stock from the
NASDAQ Global Market, and could  adversely affect  our  reputation, results  of operations  and financial
condition.

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

We  are subject to the periodic reporting  requirements of the  Exchange Act.  Our disclosure

controls and procedures are designed  to  reasonably  assure that information required  to  be  disclosed by
us in reports we file or submit under  the Exchange Act  is accumulated  and  communicated to
management, recorded, processed, summarized and reported within the time periods  specified in the
rules and forms of the SEC. We believe that any  disclosure controls and procedures or internal controls
and procedures, no matter how well  conceived and  operated, can provide only reasonable, not absolute,
assurance that the  objectives of the control system are met.

These inherent limitations include the realities that  judgments in  decision-making can be faulty,

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

We will 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.

As a public company, we are incurring  and will continue to incur  significant  legal, accounting and

other expenses that we did not incur as  a private company, and these expenses may increase even more
after we are no longer an ‘‘emerging growth company.’’ We are subject  to  the reporting requirements
of the Exchange Act, the Sarbanes-Oxley  Act, the Dodd-Frank Wall  Street Reform  and Protection Act,
as well as rules adopted, and to be adopted, by the SEC  and NASDAQ Stock Market.  Our
management and other personnel need  to  devote  a substantial amount of time  to  these  compliance
initiatives. Moreover, these rules and  regulations substantially increase our  legal and financial
compliance costs and make some activities more time-consuming and costly. In the future,  we estimate
that we will incur approximately $2.0 to $3.0 million  of incremental costs per  year associated with being
a publicly traded company, although  it  is  possible that  our actual incremental costs  will be higher than
we currently estimate. For example, these  rules and regulations  can make it  more difficult and more
expensive for us to obtain director and  officer  liability  insurance and we  may be required  to  incur
substantial costs to maintain the sufficient coverage. We  cannot predict or  estimate the amount or
timing of  additional costs we may incur to respond to these requirements. The impact of these
requirements could also make it more  difficult for us to attract and retain qualified persons to serve on
our  board of directors, our board committees or as  executive officers.

66

Because we do not anticipate paying any cash dividends  on our  capital stock in  the foreseeable future,  capital
appreciation, if any, will be your sole source  of gain.

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

Future sales and issuances of our common  stock or  rights to purchase  common stock, including pursuant to
our equity incentive plans, could result in additional dilution of the percentage  ownership of our stockholders
and could cause our stock price to fall.

We  expect that significant additional capital will be needed in  the future  to  continue our planned
operations. To raise capital, we may sell  substantial  amounts  of common stock or  securities convertible
into or exchangeable for common stock.  These future issuances of common stock or  common stock-
related securities, together with the exercise of outstanding  options and any additional  shares issued  in
connection with acquisitions, if any, may result in material dilution to our investors.  Such  sales may  also
result in material dilution to our existing  stockholders, and new investors could gain  rights, preferences
and privileges senior to those of holders  of  our common stock, including  shares of common  stock sold
in this offering.

Pursuant to our equity incentive plans,  our  compensation  committee is authorized  to  grant equity-

based incentive awards to our directors,  executive  officers and  other employees  and service providers,
including officers, employees and service  providers of our subsidiaries and affiliates. The number  of
shares of our common stock available for  future grant under our  2013 Equity  Compensation Plan,
which  became effective in July 2013,  was 676,236  as of December 31, 2013. Future option grants and
issuances of common stock under our 2013 Equity Compensation Plan may  have an adverse effect on
the market price of our common stock.

We have  broad discretion in the use of  the net proceeds from our initial  public offering and  may not use them
effectively.

On July 30, 2013, the Company completed its  initial public offering of 5,941,667  shares of the

Company’s common stock, at a price of  $15.00 per share, including 775,000 shares of common stock
issued upon the exercise in full by the underwriters  of  their option to purchase additional shares  at the
same price to cover over-allotments. The  Company  received net  proceeds of $79,811,000 from the sale,
net of underwriting discounts and commissions and other estimated  offering expenses. The offer and
sale of all of the shares in the offering were registered under the Securities Act in accordance with the
Company’s final prospectus filed on  July  25,  2013 with  the SEC pursuant to Rule  424(b)(4)  of  the
Securities Act.

We  have invested the net proceeds from the offering in a  variety of capital preservation

investments, including short-term, investment grade, interest bearing instruments  such as U.S.
government securities and money market funds. We have broad discretion in  the use  of  the net
proceeds from our initial public offering and  could  spend  the proceeds in ways that do  not  improve our
results of operations or enhance the  value  of  our  stock. The failure by our management to apply these
funds  effectively could result in financial  losses that  could have a material adverse effect on our
business, cause the market price of our  common stock to decline  and  delay the development  of  our
product  candidates. Pending their use, we  may  invest  the net proceeds  from the offering in a  manner
that does not produce income or that loses  value. If we  do not invest  the net proceeds from the
offering in ways that enhance stockholder value, we may fail  to  achieve expected financial  results, which
could cause the price of our common  stock  to  decline.

67

Some provisions of our charter documents and Delaware  law may have anti-takeover effects that could
discourage an acquisition of us by others, even if an acquisition would be  beneficial to  our  stockholders and
may prevent attempts by our stockholders to replace or remove our  current  management.

Provisions in our tenth amended and  restated  certificate of incorporation,  or certificate of

incorporation, and amended and restated bylaws, as well as provisions  of  Delaware law, could make it
more difficult for a third party to acquire us or increase  the cost of  acquiring  us,  even  if doing  so
would benefit our stockholders, or remove our current  management. These include provisions that will:

(cid:127) permit our board of directors to issue up to 5,000,000  shares  of  preferred stock, with  any rights,

preferences and privileges as they may designate;

(cid:127) provide that all vacancies on our board  of  directors,  including as  a result of  newly  created

directorships, may, except as otherwise required by  law,  be  filled by the affirmative vote of a
majority of directors then in office, even  if  less than a  quorum;

(cid:127) require that any action to be taken  by our stockholders must be effected at  a duly  called annual

or special meeting of stockholders and  not be taken  by written consent;

(cid:127) provide that stockholders seeking to present proposals  before  a  meeting of stockholders or to

nominate candidates for election as directors at a meeting  of stockholders must provide advance
notice in writing, and also specify requirements as  to  the form and  content of a  stockholder’s
notice;

(cid:127) not provide for cumulative voting rights, thereby  allowing the holders of a  majority of the shares

of common stock entitled to vote in any election of directors  to  elect  all of  the directors
standing for election; and

(cid:127) provide that special meetings of our stockholders may be called  only by the  board of  directors or

by such person or persons requested by a majority of the board of directors to call such
meetings.

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, who are responsible for appointing the members  of our  management. Because we are
incorporated in Delaware, we are governed by  the provisions of  Section 203 of  the Delaware General
Corporation Law, which may discourage, delay or  prevent someone  from  acquiring  us or merging with
us whether or not it is desired by or  beneficial to our stockholders. Under Delaware  law,  a corporation
may not, in general, engage in a business  combination with any holder of 15% or  more of its capital
stock unless the holder has held the stock for  three years or, among other  things, the  board of  directors
has approved the transaction. Any provision of our amended  and restated certificate  of incorporation
or amended and restated bylaws or Delaware law that  has the effect of delaying or deterring a change
in control could limit the opportunity for  our  stockholders to receive a premium for their  shares of our
common stock, and could also affect the  price  that some investors are  willing  to  pay for  our common
stock.

If securities or industry analysts do not publish research  or publish inaccurate or  unfavorable research  about
our business, our stock price and trading  volume could decline.

The trading market for our common  stock is influenced by  the research and  reports that securities

or industry analysts publish about us or  our business. We  do not  have any control over these analysts.
There can be no assurance that analysts  will continue to cover us or  provide favorable coverage. If  one
or more of the analysts who cover us  downgrade our  stock  or change their opinion  of  our  stock,  our
share price would likely decline. If one or more of these analysts cease  coverage  of our  company or fail

68

to regularly publish reports on us, we could lose visibility  in the financial  markets,  which could cause
our  share price or trading volume to decline.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 2. PROPERTIES

Our corporate headquarters and research  facilities are located in Newtown, Pennsylvania,  where
we lease an aggregate of approximately 9,500 square feet of office and  laboratory space, pursuant to
lease agreements, the terms of which expire in March 2014  and September 2014, respectively. We  have
a second office located in Pennington,  New Jersey, where  we lease an  aggregate  of approximately  5,200
square feet of office space pursuant to  lease agreements, the  terms of which expire  in February 2015
and  October 2014, respectively. This  facility houses our  clinical development, clinical  operations,
regulatory and commercial personnel.

We believe that our existing facilities are adequate for our near-term needs. When our leases
expire, we may exercise renewal options or look for  additional  or alternate space  for our operations.
We believe that suitable additional or  alternative space would be available  if required in  the future on
commercially reasonable terms.

ITEM 3. LEGAL PROCEEDINGS

We are not a party to any legal proceedings and we  are  not aware of any claims or  actions pending

or threatened against us. In the future, we  might from time to time become  involved in litigation
relating to claims arising from our ordinary  course of business.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

69

PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON  EQUITY, RELATED STOCKHOLDER  MATTERS

AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information

Our common stock began trading on  the NASDAQ Global Market  on July 25, 2013  under the
symbol ‘‘ONTX.’’ Prior to that time, there was no public market for our common stock. Shares sold  in
our  initial public offering on July 24,  2013  were priced  at $15.00 per share.

The following table sets forth the high and low  sales prices per share of our  common stock as

reported on the NASDAQ Global Market  for  the period  indicated.

Year  Ended December 31, 2013

High

Low

Fourth quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third quarter (beginning July 25, 2013) . . . . . . . . . . . . . . . . . . . . .

$31.13
30.00

$11.31
19.42

Stockholders

As of February 28, 2014, there were  216 holders of record for shares of our  common stock. This

does not reflect beneficial stockholders  who held their common  stock  in ‘‘street’’ or nominee name
through brokerage firms.

Securities Authorized for Issuance Under  Equity Compensation Plans

Information regarding securities authorized for issuance under  the Company’s equity  compensation

plans is contained in Part III, Item 12  of  this Annual Report.

Performance Graph

The following graph illustrates a comparison of the  total  cumulative stockholder return for our

common stock since July 25, 2013, which  is the first trading day  for our stock, to two indices: the
NASDAQ Composite Index and the NASDAQ Biotechnology Index. The graph assumes  an initial
investment of $100 on July 25, 2013, in  our common stock, the  stocks comprising the  NASDAQ
Composite Index, and the stocks comprising the NASDAQ  Biotechnology  Index.  Historical  stockholder
return  is not necessarily indicative of the performance to be expected for  any future periods.

70

Comparison of 3 Month Cumulative  Total Return*
Among Onconova Therapeutics Pharmaceuticals, Inc., the NASDAQ Composite Index and the
NASDAQ Biotechnology Index

$160.00

$140.00

$120.00

$100.00

$80.00

$60.00

s
n
r
u
t
e
R
e
c
i
r
P

$40.00

7/25/2013

ONTX

NASDAQ Composite Index

NASDAQ Biotechnology Index

8/25/2013

9/25/2013

10/25/2013

11/25/2013

12/25/2013

12/31/2013

18MAR201405405124

*

$100 invested on 7/25/2013 in stock  or  index.

The performance graph shall not be  deemed to be incorporated by  reference by means  of  any

general statement incorporating by reference  this Annual Report  into  any filing under the Securities
Act of 1933, as amended or the Exchange Act, except to the extent  that we specifically incorporate
such information by reference, and shall not  otherwise be deemed filed under such acts.

Dividend Policy

We  have never declared or paid any cash dividends on  our capital stock. We currently intend to
retain all available funds and any future earnings  to  support our  operations  and finance the growth  and
development of our business. We do not intend to pay cash dividends on  our common  stock for  the
foreseeable future.

Issuer  Purchases of Equity Securities

We  did not purchase any of our registered equity  securities during the  period covered by this

Annual Report.

Use of Proceeds from Registered Securities

On July 30, 2013, the Company completed its  initial public offering of 5,941,667  shares of the

Company’s common stock, at a price of  $15.00 per share, including 775,000 shares of common stock
issued upon the exercise in full by the underwriters  of  their option to purchase additional shares  at the
same price to cover over-allotments. The  Company  received net  proceeds of $79,811,000 from the sale,
net of underwriting discounts and commissions and other offering expenses. The offer and  sale of  all  of
the shares in the offering were registered  under the Securities Act in accordance  with the Company’s
final prospectus filed on July 25, 2013  with the SEC  pursuant to Rule 424(b)(4) of the  Securities  Act.

We  have invested the net proceeds from the offering in a  variety of capital preservation

investments, including short-term, investment grade, interest bearing instruments  such as U.S.
government securities and money market funds. There has  been no material change in our planned use
of the net proceeds from the offering  as  described  in our final prospectus filed  with the Securities and
Exchange Commission pursuant to Rule 424(b)(4) under the Securities Act on  July 25,  2013. We  have
broad discretion in the use of the net  proceeds from our  initial public offering and  could  spend  the
proceeds in ways that do not improve our  results of  operations  or  enhance the  value of  our stock.

71

 
ITEM 6. SELECTED FINANCIAL DATA

The selected financial data set forth  below is derived from our  audited consolidated financial
statements and may not be indicative of  future operating results. The  following  selected  consolidated
financial data should be read in conjunction with Item 7, ‘‘Management’s Discussion and Analysis of
Financial Condition and Results of Operations’’  and the consolidated financial statements and the
notes thereto included elsewhere in this report. The  selected  financial data in this section are not
intended to replace our consolidated financial statements and the related notes. Our historical results
are not necessarily indicative of our future  results.

Consolidated Statement of Operations  Data:
Revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating expenses:

Years ended December 31,

2013

2012

2011

$ 4,753,000

$ 46,190,000

$ 1,487,000

General and administrative . . . . . . . . . . . . . . . . . . . . .
Research and development . . . . . . . . . . . . . . . . . . . . . .

16,793,000
50,182,000

15,707,000
52,762,000

6,436,000
22,624,000

Total operating expenses . . . . . . . . . . . . . . . . . . . . . .

66,975,000

68,469,000

29,060,000

Loss from operations . . . . . . . . . . . . . . . . . . . . . . . . . . .

(62,222,000)

(22,279,000)

(27,573,000)

Change in fair value of warrant liability . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

42,000
(4,000)
63,000

367,000
(8,608,000)
608,000

1,287,000
(19,000)
11,000

Net loss before income taxes . . . . . . . . . . . . . . . . . . . . . .
Income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(62,121,000)
435,000

(29,912,000)
—

(26,294,000)
—

Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net loss attributable to non-controlling  interest . . . . . . . . .

(62,556,000)
13,000

(29,912,000)
—

(26,294,000)
—

Net loss attributable to Onconova Therapeutics, Inc . . . . .
Accretion of redeemable convertible  preferred stock . . . . .

(62,543,000)
(2,320,000)

(29,912,000)
(3,953,000)

(26,294,000)
(4,020,000)

Net loss applicable to common stockholders . . . . . . . . . . .

$(64,863,000) $(33,865,000) $(30,314,000)

Net loss per share of common stock, basic and diluted . . .

$

(6.12) $

(15.35) $

(14.18)

Basic and diluted weighted average shares  outstanding . . .

10,594,227

2,206,888

2,137,403

December 31,

2013

2012

2011

Consolidated Balance Sheet Data:
Cash, cash equivalents and marketable  securities . . . . .
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated deficit . . . . . . . . . . . . . . . . . . . . . . . . . .
Total stockholders’ equity (deficit) . . . . . . . . . . . . . . . .

$ 100,003,000
105,153,000
24,253,000
(230,896,000)
80,900,000

$ 81,527,000
83,852,000
40,843,000
(168,353,000)
(158,306,000)

$

2,713,000
4,462,000
12,081,000
(138,441,000)
(138,419,000)

72

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 consolidated  financial  statements and the related notes and  other financial
information included elsewhere in this  Annual Report. Some of  the  information  contained in this discussion
and analysis or set forth elsewhere in this  Annual Report, including information  with respect  to our  plans
and strategy for our business and related financing, includes forward-looking statements  that  involve risks
and uncertainties. You should review the ‘‘Risk  Factors’’ section of this Annual Report  for a discussion of
important factors that could cause actual results to 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 discovering  and developing novel

small molecule drug candidates to treat  cancer. Using our  proprietary chemistry platform, we have
created an extensive library of targeted anti-cancer agents designed to work against specific  cellular
pathways that are important to cancer  cells. We believe  that  the  drug candidates in our  pipeline have
the potential to be efficacious in a wide variety  of  cancers  without causing harm  to  normal cells. We
have  three clinical-stage product candidates  and six  preclinical programs.

Rigosertib, our most advanced product candidate, is  being  tested in  clinical studies for

myelodysplastic syndromes, or MDS and  head  and neck cancers.  To date, we  have enrolled more  than
1,000 patients in rigosertib trials in hematological diseases and solid tumors. In February  2014, the
Company announced top-line analysis of a Phase 3 trial  of rigosertib IV in higher risk  MDS patients
who had progressed on, failed to respond to or relapsed  after  prior therapy with  hypomethylating
agents (HMAs). Although the results  of  this study showed numerical improvement in median overall
survival in the rigosertib treated patients,  the  observed  improvement  of  2.4 months did not meet  the
required level of statistical significance. However, a statistically significant improvement in median
overall survival was evident in the subset of patients  who had progressed on or failed to respond to
previous treatment with hypomethylating agents (HMAs). We  plan to consult with regulatory
authorities to determine the next steps for  rigosertib IV  in higher risk MDS.  We are also testing
rigosertib in two Phase 2 trials for transfusion-dependent lower  risk MDS,  in a Phase 2 trial for head
and  neck cancers and in a Phase 1/2 study in combination  with  azacitidine for first-line treatment  of
MDS. We also evaluated rigosertib in a Phase 3 trial for metastatic  pancreatic cancer.  In December
2013, a pre-planned interim futility and safety  analysis for this trial  was performed and  as a result the
study  was discontinued. Baxter Healthcare SA, or Baxter, has commercialization rights for  rigosertib  in
Europe and SymBio Pharmaceuticals Limited, or  SymBio,  has commercialization rights in Japan and
Korea. We have retained development and  commercialization  rights to rigosertib in  the rest of the
world, including in the United States.

Our second clinical-stage product candidate is ON 013105, or briciclib, a small molecule targeting
an important regulatory protein, cyclin  D1, which is often found at elevated  levels in  cancer cells. We
are planning to resume Phase 1 clinical development of briciclib (ON  013105)  in 2014 with a multi-site
dose escalation study in patients with advanced solid tumors refractory  to  current therapies.

Our third clinical-stage product candidate,  recilisib,  is being developed in collaboration with the
U.S. Department of Defense for acute radiation syndromes.  We have conducted animal  studies and
clinical trials of recilisib under the FDA’s  Animal Efficacy Rule, which permits marketing approval for
new medical countermeasures for which  human efficacy studies are not feasible or ethical,  by  relying on
evidence from animal studies in appropriate  animal models to support efficacy  in humans. We have
completed four Phase 1 trials to evaluate  the safety and pharmacokinetics  of  recilisib  in healthy  human
adult subjects using both subcutaneous and oral  formulations.

73

In addition to our three clinical-stage product  candidates, we  are  advancing six  preclinical
programs that target kinases, cellular metabolism or division. We  intend to explore additional
collaborations to further the development of these  product candidates  as we  focus internally on our
more advanced programs.

We  were incorporated in Delaware in December 1998 and  commenced operations in  January 1999.

Our operations to date have included our organization and staffing, business planning, raising capital,
in-licensing technology from research  institutions, identifying potential product  candidates, developing
product  candidates and building strategic  alliances,  as well as  undertaking preclinical  studies and
clinical trials of our product candidates.

Since commencing operations we have dedicated  a significant  portion of our resources to our
development efforts for our clinical-stage  product candidates,  particularly rigosertib. We incurred
research and development expenses of $50.2 million, $52.8 million and  $22.6 million during the  years
ended December 31, 2013, 2012 and 2011, respectively. We anticipate  that  a significant  portion of our
operating expenses will continue to be related to research and development as  we continue  to  advance
our  preclinical programs and our clinical-stage product  candidates. In July  2013, we  completed our
initial public offering, or IPO, from which we  received net  proceeds of $79.8 million.  Prior to the
consummation of the IPO, we funded  our operations  primarily  through the sale of preferred stock
amounting to $144.7 million, including  $50.0 million that Baxter  invested in our Preferred Stock in
2012, as well as proceeds from the issuance of convertible debt and  a stockholder loan amounting to
$26.8 million in the aggregate, all of which  was later converted into shares  of  our  Preferred Stock, and
upfront payments of $7.5 million from SymBio and $50.0 million from Baxter in  connection with  our
collaboration agreements. We have also received an  aggregate of $8.0  million from  The  Leukemia and
Lymphoma Society, or LLS, under a  funding agreement.  Under our  collaboration  agreements with
Baxter and SymBio, we are also eligible  to receive  an aggregate of up to $359.5 million upon the
achievement of specified development and  regulatory  milestones and up to $280.0  million upon the
achievement of specified commercialization milestones, as well as tiered  royalties, at percentage rates
ranging from the low-teens to low-twenties, on any future net sales of products  resulting from these
collaborations. As  of December 31, 2013, we had $100.0 million in cash, cash equivalents  and
marketable securities, respectively.

Our net  losses were $62.6 million, $29.9 million and $26.3  million for the years ended

December 31, 2013, 2012 and 2011, respectively. We recognized revenues of $4.8  million,  $46.2 million
and $1.5 million for the years ended December 31, 2013, 2012 and 2011,  respectively. As of
December 31, 2013, we had an accumulated  deficit of  $230.9  million.  We expect to incur significant
expenses and operating losses for the  foreseeable future  as we continue the  development and  clinical
trials of, and seek regulatory approval for, our product  candidates, even as milestones under  our license
and collaboration agreements may be  met. If we obtain regulatory approval for any of our product
candidates, we expect to incur significant commercialization expenses. We do not currently have  an
organization for the sales, marketing  and distribution of pharmaceutical products. We  may rely  on
licensing and co-promotion agreements  with strategic or collaborative partners for the
commercialization of our products in the  United States and other territories. If we choose  to  build a
commercial infrastructure to support  marketing in the  United States for any of our product  candidates
that achieve regulatory approval, such  commercial infrastructure  could be  expected to include  a
targeted, oncology sales force supported by sales management,  internal sales support,  an internal
marketing group and distribution support. To develop the appropriate commercial  infrastructure
internally, we would have to invest financial and management  resources,  some of  which would have  to
be deployed prior to having any certainty  about marketing approval.

Furthermore, we have and expect to  continue to incur  additional costs associated with  operating as

a public  company. Accordingly, we will seek to fund our operations primarily through public equity or
debt financings or other sources. Other additional financing may not  be  available to us  on acceptable

74

terms, or at all. Our failure to raise capital as  and when needed or on less favorable terms could have a
material adverse effect on our financial  condition and  our  ability to pursue our business strategy.

Collaboration Agreements

Baxter Healthcare SA

In September 2012, we entered into a  development and license agreement with Baxter, granting

Baxter an exclusive, royalty-bearing license  for the research, development, commercialization  and
manufacture (in specified instances) of  rigosertib in all  therapeutic indications  in Europe. Under the
Baxter agreement, we are obligated to  use commercially reasonable efforts  to  direct, coordinate and
manage the development of rigosertib  for  MDS,  in accordance with a  development  plan agreed  upon
by the parties. In addition, there is a specified  mechanism set forth in the agreement to expand the
scope of the collaboration for additional  indications. Our agreement with  Baxter is guided by a  joint
steering committee. If the joint steering  committee is not able to make a  decision by consensus, then
any dispute would be resolved by specified executive officers  of  both  parties.

Under the terms of the agreement, Baxter made  an upfront payment of $50.0  million. We are

eligible to receive pre-commercial milestone payments of up to an aggregate of $337.5  million if
specified development and regulatory  milestones are  achieved.

We  may also receive up to $212.5 million in milestone  payments for regulatory approvals of the

rigosertib MDS indications specified  in the  arrangement with Baxter,  each of which  may be up to and
in excess of $100.0 million. We are also  potentially  eligible to receive an additional $20.0 million
pre-commercial milestone payment related to the timing of regulatory  approval  of rigosertib IV in
higher  risk MDS patients in Europe.  In  addition to these pre-commercial milestones, we are eligible  to
receive up to an aggregate of $250.0  million  in milestone payments  based on Baxter’s achievement of
pre-specified threshold levels of annual  net sales of rigosertib.  We are also  entitled to receive  royalties
at percentage rates ranging from the  low-teens to the low-twenties on net sales of rigosertib by Baxter
in the licensed territory. In July 2012, Baxter purchased $50.0 million of our  Series J Preferred Stock,
which  converted to shares of our common stock  immediately  prior to the  consummation of the IPO.
Baxter also invested $5.0 million in our IPO in  July 2013.

SymBio Pharmaceuticals Limited

In July 2011, we entered into a license  agreement with  SymBio, as  subsequently amended, granting
SymBio an exclusive, royalty-bearing  license  for the development and commercialization of rigosertib in
Japan and Korea. Under the SymBio license agreement, SymBio is  obligated  to  use commercially
reasonable efforts to develop and obtain  market approval  for rigosertib inside the licensed  territory,
and we have similar obligations outside  of the licensed territory.  We have also entered  into  an
agreement with SymBio that provides that  we  will  supply  them with development-stage product.  Under
the SymBio license agreement, we also agreed to supply commercial  product to SymBio under specified
terms that will be included in a commercial  supply agreement to be negotiated prior to first commercial
sale of rigosertib. We have also granted SymBio a  right of first negotiation to license or obtain the
rights to develop and commercialize  compounds  having a  chemical  structure similar  to  rigosertib  in the
licensed territory.

Under the terms of the SymBio license  agreement, we  received an upfront payment of

$7.5 million. We are eligible to receive  milestone payments of up to an aggregate of $22.0  million from
SymBio upon the achievement of specified  development and regulatory milestones for specified
indications. Of the regulatory milestones,  $5.0 million is due  upon receipt  of  marketing  approval in the
United States for rigosertib IV in higher risk MDS patients, $3.0 million is due upon receipt of
marketing approval in Japan for rigosertib IV  in higher risk MDS patients, $5.0 million is  due  upon
receipt of marketing approval in the  United  States for  rigosertib Oral  in lower risk MDS patients, and

75

$5.0 million is due upon receipt of marketing  approval in Japan  for rigosertib Oral in  lower risk  MDS
patients. Furthermore, upon receipt of marketing approval in the United  States  and Japan for an
additional specified indication of rigosertib,  which we are  currently not  pursuing, an  aggregate  of
$4.0 million would be due. In addition to these pre-commercial milestones, we are eligible to receive
tiered milestone payments of up to an  aggregate of $30.0  million based  upon  annual net sales of
rigosertib by SymBio in the licensed territory.

Further, under the terms of the SymBio license agreement, SymBio is  obligated  to  make royalty

payments to us at  percentage rates ranging  from the mid-teens to 20% based  on net sales of rigosertib
by SymBio in the licensed territory.

The Leukemia and Lymphoma Society

In May 2010, we entered into a funding agreement  with LLS  to  fund  the development  of

rigosertib. We terminated the funding  agreement effective  as of March 2013. Under  the LLS  funding
agreement, we were obligated to use the  funding received exclusively for the  payment or
reimbursement of the costs and expenses for clinical development activities for rigosertib. Under  this
agreement, we retained ownership and control of all intellectual property pertaining to works of
authorship, inventions, know-how, information,  data and proprietary material.

Under the LLS funding agreement, as amended, we  received funding  of $8.0 million from LLS
through 2012. We did not receive any  funding in  2013. We  are  required to  make  specified payments  to
LLS, including payments payable upon execution of the  first out-license,  first approval for  marketing by
a regulatory body, completion of the  first commercial sale of rigosertib, and achieving specified annual
net sales levels of rigosertib. The extent  of these payments  and our  obligations will  depend  on whether
we out-license rights to develop or commercialize rigosertib to a third  party, we commercialize
rigosertib on our own or we combine with or  are sold to another  company.  In  addition, we will pay to
LLS a  single-digit percentage royalty  of  our net sales of rigosertib, if any. The sum of our payments to
LLS is capped at three times the total funding received from LLS,  or $24.0  million.

Financial Overview

Revenue

To date, we have derived revenue principally from  activities pursuant to our collaboration

arrangements with Baxter and SymBio  as  well as from  grants and  research agreements. The  following
table sets forth a summary of revenue  recognized  from our collaboration agreements and research
agreements for the years ended December 31, 2013, 2012 and 2011:

Year Ended December 31,

2013

2012

2011

Baxter license and collaboration revenue . . .
SymBio license and collaboration revenue . . .
Research funding . . . . . . . . . . . . . . . . . . . .

$4,176,000
577,000
—

$45,490,000
503,000
197,000

$

—
227,000
1,260,000

$4,753,000

$46,190,000

$1,487,000

We  have not generated any revenue from commercial product sales. In the future, if any  of our
product  candidates currently under development  are approved  for  commercial  sale in the United  States
and Canada, we may generate revenue from product  sales,  or  alternatively, we may choose to select a
collaborator to commercialize our product candidates in these markets.

The Baxter collaboration agreement  is considered to be a multiple-element arrangement for
accounting purposes. We determined  that there are two deliverables  under the Baxter agreement;

76

specifically, the license to rigosertib for Europe and the related research and development services  that
we are obligated to provide. We concluded  that $42.4 million of the fixed and determinable
$50.0 million upfront payment was associated with the license and $7.6  million  was associated with  the
research and development services. We recognized the entire  $42.4 million associated with the upfront
license as revenue during the third quarter of 2012  upon the execution  of  the Baxter  agreement, and
we are recognizing the research and  development services revenue of $7.6  million on the proportional
performance method over the period  of commitment and  development, which  we estimate to be
through March 31, 2014, the period of our non-contingent  obligations  to  perform  research  and
development services sufficient to advance rigosertib. For the years ended  December 31, 2013, 2012
and 2011, we recognized $4.2 million, $3.1 million  and  $0.0  million,  respectively, of research and
development services revenue under the  Baxter  agreement.

The SymBio collaboration agreement  is  also considered to be a multiple-element  arrangement for

accounting purposes. We determined  that there were  three deliverables under the SymBio collaboration
agreement; specifically, the license to  rigosertib for Japan and Korea, our obligation to perform
research and development services necessary for  SymBio  to  seek  approval in  its territory  and our
obligation to participate on a joint steering committee.  We concluded  that  these deliverables should  be
accounted for as a single unit of accounting. We determined that the $7.5 million upfront  payment
received in 2011 should be deferred and recognized as  revenue on a straight-line basis through
December 2027, reflecting our estimate  of  when we will complete our obligations under the agreement.
For the years ended December 31, 2013,  2012 and 2011, we recognized revenues  of  $455,000, $455,000
and $227,000, respectively, under the SymBio collaboration  agreement. In addition,  we recognized
revenues of $122,000, $48,000 and $0.0 for the  years  ended December 31, 2013, 2012 and  2011,
respectively, related to the supply agreement with SymBio.

Pursuant to our funding agreement with LLS, during the year ended December 31,  2012, we  paid
$1.0 million to LLS, which we recorded  as research  and development  expenses. This payment reduced
the maximum milestone and royalty payment obligation  under this agreement to $23.0 million  at
December 31, 2013.

In addition, some of our obligations  under the LLS funding agreement  will remain in  effect until
the completion of specified milestones and payments to LLS. Assuming  the successful  outcome of the
development activities covered by the LLS funding agreement  and  our receipt  of  necessary  regulatory
approvals, we will be required to take  commercially reasonable steps through March  2018 to advance
the development of rigosertib in clinical  trials and to bring rigosertib to practical application for MDS
in a major market country, provided that  we  believe the product is safe  and  effective. We believe that
we can satisfy our obligation by out-licensing rigosertib to, or  partnering  rigosertib  with, a third party.
We  are required to report to LLS on our efforts and results  with respect to  continuing  development of
rigosertib. Our failure to perform these diligence  obligations, even if  we  successfully  achieve  the
specified development milestones, would require us  to  pay  back to LLS  the total amount of the  funding
we received from them, unless an exception applies. If LLS were to claim that such failure  occurred
and we disagreed with such claim, the dispute would  be  settled through binding arbitration.

As a result of the potential obligation to pay back  to  LLS the total amount  of  funding  received
under this arrangement, the $8.0 million  of milestone  payments we received through December 31,
2013 has been recorded as deferred revenue.

Preclinical Collaboration

In December 2012, we formed GBO, LLC,  or GBO, an  entity jointly-owned by both us and GVK

Biosciences Private Limited, or GVK, to collaborate on the development of two of our preclinical
programs. GVK made an initial capital  contribution of $500,000  in exchange  for a  10% interest in
GBO and we contributed a sub-license  to  the intellectual property related to the two programs in

77

exchange for a 90% interest. GVK will  be  required  to  make additional capital contributions over time,
subject to specified conditions, and its  interest in GBO will increase to as  much  as 50%. At  specified
times, we will be entitled to buy back from  GVK  the rights to either of these two programs.

GBO is consolidated in our financial statements for  the year ended December 31, 2013, which
means that we included its assets and liabilities  in our balance sheets and its  expenses in our  statements
of operations, less those amounts comprising the non-controlling  interest. The  consolidation of GBO
did not have a material effect on our consolidated  financial position  or  results  of  operations.

Operating Expenses

The following table summarizes our operating expenses for  the years ended December 31, 2013,

2012 and 2011:

General and administrative . . . . . . . . . . . .
Research and development . . . . . . . . . . . .

$16,793,000
50,182,000

$15,707,000
52,762,000

$ 6,436,000
22,624,000

Total operating expenses . . . . . . . . . . . . . .

$66,975,000

$68,469,000

$29,060,000

2013

2012

2011

General and Administrative Expenses

General and administrative expenses  consist principally  of  salaries and  related  costs for executive

and other administrative personnel, including stock-based compensation and  travel expenses.  Other
general and administrative expenses  include  facility-related costs, communication  expenses and
professional fees for legal, patent review, consulting and accounting  services.

We  anticipate that our general and administrative  expenses will increase in the future with  the
continued research and development and potential  commercialization of  our product candidates and as
we operate as a public company. These increases will likely include increased costs for  insurance, costs
related to the hiring of additional personnel and payments to outside consultants,  investor relations,
lawyers and accountants, among other  expenses.  Additionally,  if and  when we  believe a regulatory
approval of a product candidate appears likely,  we anticipate  an increase  in  payroll  and expense as a
result of our preparation for commercial operations, especially  as it relates to the sales and  marketing
of our product candidates.

Research and Development Expenses

Our research and development expenses consist  primarily of costs incurred for  the development  of

our  product candidates, which include:

(cid:127) employee-related expenses, including salaries, benefits, travel and stock-based compensation

expense;

(cid:127) expenses incurred under agreements with CROs  and investigative  sites that conduct our clinical

trials and preclinical studies;

(cid:127) the cost of acquiring, developing and manufacturing clinical trial  materials;

(cid:127) facilities, depreciation and other expenses, which include direct and allocated expenses for rent

and maintenance of facilities, insurance  and  other  supplies;  and

(cid:127) costs associated with preclinical activities and regulatory operations.

Research and development costs are expensed as incurred.  License fees and milestone payments

we make related to in-licensed products and technology are expensed if it is determined  that  they have

78

no alternative future use. We record  costs  for some  development activities,  such as clinical trials, based
on an evaluation of the progress to completion  of specific  tasks using data such  as patient enrollment,
clinical site activations or information provided to us by our vendors.

Research and development activities  are central to our business  model.  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. We
plan  to increase our research and development expenses for the  foreseeable future.

To date, our research and development  expenses have  related  primarily to the  development of

rigosertib. We do not currently utilize  a  formal  time allocation  system to capture expenses on  a
project-by-project basis because we are organized and record expense by  functional department and our
employees may allocate time to more  than  one  development project.  Accordingly, we do not allocate
expenses to individual projects or product candidates, although we do allocate  some portion of our
research and development expenses by functional  area and by compound.

The following table summarizes our research and development expenses  by  functional area for the

years ended December 31, 2013, 2012 and 2011:

Twelve Months Ended December 31,

2013

2012

2011

Pre-clinical & clinical development . . . . . .
Milestones & royalties . . . . . . . . . . . . . . .
Personnel related . . . . . . . . . . . . . . . . . . .
Manufacturing, formulation &

development . . . . . . . . . . . . . . . . . . . . .
Stock-based compensation . . . . . . . . . . . .
Consulting fees . . . . . . . . . . . . . . . . . . . .

$28,693,000

$20,957,000
— 13,500,000
4,876,000

$11,593,000
1,875,000
4,020,000

9,059,000

4,967,000
3,170,000
4,293,000

3,362,000
6,645,000
3,422,000

3,184,000
3,000
1,949,000

$50,182,000

$52,762,000

$22,624,000

It  is difficult to determine with certainty the duration and completion costs  of  our  current or
future preclinical programs and clinical trials of our  product candidates,  or if,  when or  to  what extent
we will generate revenues from the commercialization and  sale of  any of  our  product candidates  that
obtain regulatory approval. We may never succeed in  achieving  regulatory approval  for any of our
product  candidates. The duration, costs and timing of clinical trials and development  of  our  product
candidates will depend on a variety of  factors, including the uncertainties of future clinical and
preclinical studies, uncertainties in clinical trial enrollment rate  and significant and changing
government regulation. In addition, the  probability  of success for each product candidate will depend
on numerous factors, including competition,  manufacturing  capability  and commercial  viability. We  will
determine which programs to pursue and how much to fund each  program  in response to the scientific
and clinical success of each product candidate, as  well as an  assessment of each product candidate’s
commercial potential.

Change in Fair Value of Warrant Liability

We  issued warrants for the purchase  of our Series  G convertible preferred stock that we believed

were financial instruments that might require  a transfer of assets because of the  redemption features of
the underlying preferred stock. Therefore,  we classified these warrants  as liabilities that we  re-measured
to fair value at each balance sheet date and we recorded the changes in the fair  value of  the warrant
liability as either income or expense. Upon consummation of our  IPO, the  underlying  preferred stock
was converted to common stock, and  the fair value of the warrant liability at that time  was  reclassified
to additional paid-in capital.

79

Interest Expense and Other Income, Net

Other income, net consists principally of interest income earned on cash and cash  equivalent

balances and income earned on our sale of New Jersey state net operating losses in  2012.

Interest expense for the years ended December 31, 2013, 2012 and 2011 consisted of cash  paid and

non-cash interest expense related to  our  prior loan from  a stockholder and convertible promissory
notes payable, as well as a charge of $8.2  million  for the  unamortized contingent beneficial conversion
feature upon conversion of those promissory  notes into shares  of Series I  convertible preferred stock in
2012.

Accretion of Preferred Stock

We  accounted for the redemption of  premium and issuance costs on our preferred stock using  the

interest method, accreting such amounts  to preferred stock from the date of issuance to the earliest
date  of  redemption. Immediately prior to the consummation of  our IPO, all series of our preferred
stock converted into common stock.

Critical Accounting Policies and Significant Judgments and Estimates

This management’s discussion and analysis of our financial condition and results of operations is
based on our consolidated financial statements,  which have  been prepared in  accordance  with GAAP.
The preparation of these financial statements requires us to make estimates  and judgments that affect
the reported amounts of assets, liabilities,  revenues and expenses and the disclosure  of contingent
assets and liabilities in our consolidated  financial statements.  On an ongoing basis,  we evaluate our
estimates and judgments, including those related to accrued expenses,  revenue recognition, deferred
revenue and stock-based compensation.  We base our estimates on historical experience, known trends
and events and various other factors that  we  believe to be reasonable  under the circumstances,  the
results of which form the basis for making  judgments about the carrying values  of assets 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 described  in the notes to our  consolidated  financial
statements appearing elsewhere in this prospectus, we believe the  following  accounting policies to be
most critical to the judgments and estimates  used  in the preparation of our consolidated financial
statements.

Revenue Recognition

We  generate revenue primarily through collaborative research and  license  agreements. The terms

of these  agreements contain multiple deliverables, which may include  licenses, research and
development activities, participation in  joint steering  committees and product  supply. The terms  of
these agreements may include nonrefundable upfront  license  fees,  payments for  research  and
development activities, payments based  upon the achievement of specified  milestones, royalty  payments
based on product sales derived from the  collaboration,  and  payments for  supplying product. In all
instances, we recognize revenue only when the price is fixed  or determinable, persuasive  evidence of an
arrangement exists, delivery has occurred  or the services have been rendered, collectability of the
resulting receivable is reasonably assured and we have  fulfilled  our performance obligations under the
contract.

Effective January 1, 2011, we adopted the Financial Accounting Standards Board,  or FASB,
Accounting Standards Update, or ASU,  No.  2009-13, Multiple-Deliverable Revenue Arrangements, or
ASU 2009-13. This guidance, which applies to multiple-element  arrangements entered  into  or materially
modified on or after January 1, 2011,  amends the criteria for separating and allocating consideration in

80

a multiple-element arrangement by modifying the fair value  requirements  for revenue recognition and
eliminating the use of the residual value method. The  selling prices of deliverables under an
arrangement may be derived using third-party evidence,  or TPE, or a best  estimate of selling price, or
BESP, if vendor-specific objective evidence  of  fair value, or VSOE, is not available. The objective of
BESP is to determine the price at which we would  transact  a sale if  the element  within the license
agreement was sold on a standalone basis. Establishing BESP involves management’s  judgment and
takes into account multiple factors, including market conditions and  company-specific factors, such as
those factors contemplated in negotiating  the agreements  as well  as internally developed models that
include assumptions related to market  opportunity,  discounted cash flows, estimated development costs,
probability of success, and the time needed  to  commercialize a product candidate pursuant to the
license. In validating the BESP, management  considers whether changes in  key  assumptions used  to
determine the BESP will have a significant  effect on the  allocation of the arrangement  consideration
between the multiple deliverables. We  may use third-party valuation specialists to assist us in
determining BESP. Deliverables under the  arrangement are  separate  units of accounting if (i) the
delivered item has value to the customer  on a  standalone basis  and (ii)  if the  arrangement includes a
general right of return relative to the delivered item, delivery  or  performance of  the undelivered item is
considered probable and substantially within our control. The arrangement consideration that is  fixed
or determinable at the inception of the  arrangement is  allocated to the  separate units of accounting
based on their relative selling prices.  The  appropriate  revenue  recognition model is applied to each
element and revenue is accordingly recognized  as each element is  delivered. Management exercises
significant judgment in determining whether a  deliverable is  a  separate unit of accounting.

In determining the separate units of  accounting, we  evaluate whether the license has standalone

value to the collaborator based on consideration of the  relevant facts and circumstances for each
arrangement. Factors considered in this  determination include the research  and development
capabilities of the  collaborator and the  availability  of  relevant  research  expertise in  the marketplace. In
addition, we consider whether or not  (i) the  collaborator  can use the license for its  intended purpose
without the receipt of the remaining deliverables, (ii)  the value of the license is  dependent on the
undelivered items and (iii) the collaborator or other vendors can  provide the undelivered  items.

Under a collaborative research and license agreement,  a steering  committee is  typically responsible

for overseeing the general working relationships,  determining the protocols to be followed in the
research and development performed, and evaluating  the results  from  the continued development of
the product. We evaluate whether our participation  in joint steering committees is  a substantive
obligation or  whether the services are considered inconsequential  or perfunctory. The  factors we
consider in determining if our participation in  a joint steering committee is  a substantive obligation
include: (i) which party negotiated or requested the steering  committee, (ii) how frequently the steering
committee meets, (iii) whether or not  there  are any  penalties or other  recourse if we do not attend the
steering committee meetings, (iv) which  party has  decision  making authority on the steering  committee
and (v) whether or not the collaborator  has the requisite experience and  expertise  associated with  the
research and development of the licensed intellectual property.

For all periods presented, whenever we determine that an element is delivered over a  period of
time, we recognize revenue using either  a  proportional performance model or  a straight-line  model
over the period of performance, which  is  typically the research  and  development term. We typically  use
progress achieved under our various  CRO  contracts as  the measure of  performance. At each reporting
period, we reassess our cumulative measure of performance and  make appropriate adjustments, if
necessary. We recognize revenue using the proportional  performance  model whenever we can make
reasonably reliable estimates of the level of effort required  to  complete our  performance obligations
under an arrangement. We recognize  revenue under the  proportional performance model at each
reporting period by multiplying the total expected payments  under  the contract, excluding royalties and
payments contingent upon achievement of milestones, by  the ratio of the level  of  effort incurred to

81

date  to the estimated total level of effort required  to  complete the performance obligations under  the
arrangement. Revenue is limited to the lesser  of  the cumulative amount  of payments  received or  the
cumulative amount of revenue earned, as  determined using the  proportional performance  model  as of
each  reporting period. Alternatively, if we  cannot make reasonably reliable estimates of the level of
effort required to complete our performance  obligations under  an arrangement, then  we recognize
revenue under the arrangement on a  straight-line  basis over the period expected to complete  our
performance obligations.

Incentive milestone payments may be triggered  either by the results  of our research efforts or by

events external to us, such as regulatory  approval  to  market  a  product. We recognize  consideration that
is contingent upon achievement of a milestone in its entirety as  revenue in the period in which  the
milestone is achieved, but only if the  consideration earned  from the achievement of a milestone meets
all the criteria for  the milestone to be considered substantive at the inception of  the arrangement. For
a milestone to be considered substantive,  the consideration  earned by achieving the milestone  must  be
commensurate with either our performance to achieve the  milestone or the  enhancement  of  the value
of the item delivered as a result of a specific outcome resulting from our performance  to  achieve the
milestone, relate solely to our past performance  and  be  reasonable relative  to  all  deliverables and
payment terms in the collaboration agreement.

For events for which the occurrences  are contingent solely upon  the passage of time or are  the
result of performance by a third party, we will recognize the  contingent payments  as revenue  when
payments are earned, the amounts are  fixed and  determinable and collectability is  reasonably  assured.

We  will recognize royalty revenue, if any, as  earned in accordance  with the  contract terms  when

third-party sales can be reliably measured and  collectability is reasonably assured.

We  recognized revenue of $4.2 million, $45.5 million and $0.0  million during the  years  ended
December 31, 2013, 2012 and 2011, respectively, under our  license and  collaboration  agreement with
Baxter. We recognized revenue of $577,000, $503,000 and $227,000 during the years ended
December 31, 2013, 2012 and 2011, respectively, under our  license and  collaboration  agreement with
SymBio. The remaining revenue recognized during the  years  ended December  31, 2013, 2012 and  2011
of $0,  $197,000 and $1,260,000, respectively, pertained to research and development services provided
under research grants. The Baxter and SymBio agreements  are  the  only agreements that are being
accounted for under ASU 2009-13.

Research and Development Expenses

Research and development costs are charged to expense  as incurred  and  include, but are  not
limited to, license fees related to the acquisition of  in-licensed products, employee-related  expenses,
including salaries, benefits and travel,  expenses incurred  under agreements  with CROs and investigative
sites that conduct clinical trials and preclinical studies, the cost of  acquiring,  developing  and
manufacturing clinical trial materials,  facilities, depreciation  and  other expenses, which include direct
and allocated expenses for rent and maintenance of facilities, insurance and  other supplies and costs
associated with preclinical activities and  regulatory operations.

We  record costs for certain development activities, such as  clinical trials, based on our evaluation

of the progress to completion of specific  tasks  using data such as  patient  enrollment,  clinical site
activations, or information provided to us by our vendors  on their  actual  costs incurred. Payments for
these activities are based on the terms of  the individual arrangements, which may differ from  the
pattern of costs incurred, and are reflected in  the consolidated  financial  statements as prepaid or
accrued research and development expense, as the case  may be.

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Income Taxes

We  recorded deferred tax assets of $93.3  million  as of December 31, 2013,  which have been fully

offset by a valuation allowance due to  uncertainties surrounding our  ability to realize these tax benefits.
The deferred tax assets are primarily composed of federal and  state tax net  operating loss, or NOL,
carry forwards and research and development  tax  credit carry forwards.  As of December 31, 2013, we
had federal NOL carry forwards of $119.2  million, state NOL carry forwards of $99.3 million and
research and development tax credit  carry  forwards  of  $35.1 million available to reduce  future taxable
income, if any. These federal NOL carry forwards  will begin  to  expire at various dates starting in 2022.
The state NOL carry forwards will begin to expire  at various dates starting in  2016. In general,  if  we
experience a greater than 50 percentage  point aggregate  change in ownership of  specified significant
stockholders over a three-year period,  utilization of our pre-change NOL carry forwards will be subject
to an annual limitation under Section 382 of the U.S. Internal  Revenue Code of 1986,  as amended, or
the Code, and similar state laws. Such  limitations may  result in expiration of a  portion of the NOL
carry forwards before utilization and  may  be substantial. We have  determined that we  have experienced
ownership changes in the past and approximately $24.0 million of our NOL carry  forwards are  subject
to an annual limitation under Section 382 of the Code. If we experienced a Section  382 ownership
change in connection with the offering  or  as a  result of future changes in our stock ownership, some of
which  changes are outside our control, the tax benefits  related to the  NOL carry forwards may be
further limited or lost.

Stock-Based Compensation

Prior to April 2013, our stock option  awards  were accounted  for as liability awards as  we, through
our  chairman of the board of directors, who is  also a significant stockholder, had  established a pattern
of settling these awards for cash. Accordingly, we  measured stock-based compensation expense at the
end of each reporting period based on  the intrinsic  value of all  outstanding vested stock options on
each  reporting date and recognized expense  based on any increases in  their intrinsic value since the  last
measurement date to the extent the stock  options  vested. The intrinsic  value represented the  difference
between the current fair value of our  common stock and the  contractual exercise prices of  the awards.

On April 23, 2013, we distributed a notification letter  to  all  holders of stock options under  our
2007 Equity Compensation Plan advising them that cash settlement transactions would no longer occur,
unless, at the time of a cash settlement  transaction, the option holder has held  the common stock
issued upon exercise of options for a period of greater than  six months prior to such  cash settlement
transaction and that any such settlement  would be at the fair value  of  the common stock on the date  of
such sale. Following this notification,  we  reclassified options  outstanding under  our 2007 Equity
Compensation Plan from liabilities to stockholders’ deficit  within our consolidated balance sheets.
Upon issuing the notification, a modification to the liability awards  occurred and  the awards are now
accounted for as equity awards from the  date of modification with  compensation  expense fixed at fair
value at the modification date. As a result,  we reclassified  the amount of stock-based compensation
liability at the modification date to additional paid-in capital. The modification date fair value is
recognized over the remaining service period, generally the vesting period, on  a straight-line  basis. The
fair value of the modified awards was estimated on the  modification  date using the  intrinsic  value
model. The grant date fair value of awards  granted after the  modification  is estimated using the  Black-
Scholes valuation model, net of estimated forfeitures. Awards granted  to  non-employees will also be
valued  using the Black-Scholes valuation model and will be subject to periodic  adjustment  until the
underlying equity instruments vest.

Stock-based compensation expense totaled  $8.0 million, $13.8 million and $6,000 for the years
ended December 31, 2013, 2012 and 2011, respectively. We record stock-based  compensation  expense
as a component of research and development expenses or  general  and administrative expenses,

83

depending on the function performed by the optionee. For the years ended  December 31,  2013, 2012
and 2011, we allocated stock-based compensation as  follows:

General and administrative . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
Research and development

$4,845,000
3,170,000

$ 7,199,000
6,645,000

$3,000
3,000

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$8,015,000

$13,844,000

$6,000

2013

2012

2011

Fair Value Estimates

Since April 23, 2013, we estimate the  fair value  of  share-based awards  to  employees and  directors

using the Black-Scholes option pricing model. The Black-Scholes  model requires  the input of highly
complex and subjective assumptions,  including  (a) the  expected stock price volatility, (b)  the calculation
of the expected term of the award, (c) the risk free interest  rate and (d) expected dividends. Due to
our  limited operating history and a lack of company specific historical  and  implied volatility data, we
based our estimate of expected volatility  on the historical volatility of a group of similar companies that
are publicly traded. When selecting these  public companies on which  we have  based its expected  stock
price volatility, we selected companies with  comparable characteristics to us, including  enterprise value,
risk profiles, position within the industry,  and with historical  share price information sufficient to meet
the expected life of the stock-based awards.  The  historical volatility  data was computed using the daily
closing prices for the selected companies’ shares during the  equivalent period of the calculated
expected term of the stock-based awards.  Due to our lack of sufficient historical data, we will continue
to apply this process until a sufficient amount of historical information regarding  the volatility of our
own stock price becomes available. We estimate  the expected  life  of our employee stock  options using
the ‘‘simplified’’ method, whereby, the  expected life  equals the arithmetic average  of the vesting term
and the original contractual term of the option.  The  risk-free interest rates for periods within  the
expected life of the option are based  on the  U.S. Treasury yield curve in effect during  the period  the
options were granted. We have never paid, and  do not expect to pay  dividends  in the foreseeable
future.

Prior to April 23, 2013, we were required to estimate  the fair value of  the common stock

underlying our stock-based awards when performing the  fair value calculations using the intrinsic value
method at each reporting date. In the  absence of a public trading market for our  common stock, on
each  grant date, we developed an estimate of the  fair value of our common stock  by  engaging an
independent third-party valuation firm to assist  our board of directors  in determining the fair value  of
the common stock underlying our stock-based awards.  We determined the fair value of our common
stock using methodologies, approaches  and assumptions consistent with  the American Institute  of
Certified Public Accountants, or AICPA, Audit  and  Accounting Practice Aid Series: Valuation of
Privately Held Company Equity Securities  Issued  as Compensation, or the AICPA Practice Guide. All
options to purchase shares of our common  stock  were  granted  with an exercise price per share no less
than the fair value per share of our common stock underlying those options on the date of grant, based
on the information known to us on the date  of  grant. Accordingly, under the liability method  of
accounting, we did not record any stock-based compensation expense on the  grant dates  of  our  options.
However, under the liability method, the  liability for all outstanding  vested stock-based awards  was
adjusted through our statement of operations,  based on the current  estimated  fair value of our common
stock at each reporting date.

Clinical Trial Expense

As part of the process of preparing our  consolidated financial statements,  we are  required to
estimate our accrued expenses. Our clinical trial accrual process is designed  to  account for  expenses

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resulting from our obligations under contracts with  vendors, consultants and CROs and  clinical site
agreements in connection with conducting  clinical trials.  The financial terms  of  these  contracts are
subject to negotiations, which vary from contract to contract  and may  result in  payment flows that do
not match the periods over which materials  or services are provided to us under such contracts. Our
objective is to reflect the appropriate  clinical trial expenses in  our consolidated  financial statements  by
matching the appropriate expenses with  the period in which  services are provided and efforts are
expended. We account for these expenses  according to the progress of  the trial as measured by patient
progression and the timing of various aspects of the  trial. We determine accrual estimates through
financial models that take into account discussion with applicable  personnel and outside service
providers as to the progress or state  of completion  of  trials, or  the  services completed.  During the
course of a clinical trial, we adjust our clinical expense  recognition  if actual results  differ  from our
estimates. We make estimates of our accrued expenses as of each balance sheet date in our
consolidated financial statements based  on  the facts and circumstances known  to  us at that time. Our
clinical trial accrual and prepaid assets are dependent, in part, upon  the receipt of timely and accurate
reporting from CROs and other third-party vendors.  Although we do not expect our estimates  to  be
materially different from amounts actually  incurred, our understanding of  the status  and timing  of
services performed relative to the actual  status and  timing of services performed may vary and may
result in us reporting amounts that are  too high or too low for any  particular period.

JOBS Act

In April 2012, the JOBS Act was enacted. Section  107 of 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. Thus,  an ‘‘emerging  growth company’’ can 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 extended transition period and, as a result, we
will adopt new or revised accounting standards on the relevant dates on which adoption of such
standards is required for other companies.

Results of Operations

Comparison of Years Ended December  31, 2013  and 2012

Revenue . . . . . . . . . . . . . . . . . . . . . . .
Operating expenses:

Year ended December 31,

2013

2012

Change

$ 4,753,000

$ 46,190,000

$(41,437,000)

General and administrative . . . . . . . .
Research and development . . . . . . . .

16,793,000
50,182,000

15,707,000
52,762,000

(1,086,000)
2,580,000

Total operating expenses . . . . . . . .

66,975,000

68,469,000

1,494,000

Loss from operations . . . . . . . . . . . . . .
Change in fair value of warrant liability .
Interest expense . . . . . . . . . . . . . . . . . .
Other income (expense), net . . . . . . . . .

(62,222,000)
42,000
(4,000)
63,000

(22,279,000)
367,000
(8,608,000)
608,000

(39,943,000)
(325,000)
8,604,000
(545,000)

Net loss before income taxes . . . . . . . . .
Income taxes . . . . . . . . . . . . . . . . . . . .

(62,121,000)
435,000

(29,912,000)
—

(32,209,000)
(435,000)

Net loss . . . . . . . . . . . . . . . . . . . . . . . .

$(62,556,000) $(29,912,000) $(32,644,000)

85

Revenues

Revenues decreased by $41.4 million in 2013 when compared  to  2012 primarily  as a result  of
entering into the Baxter agreement in  2012. Of this decrease, $42.4 million was attributable to the
revenue recognized upon signing of the Baxter agreement in  2012, offset  by  the revenue recognized
related to development services under the  Baxter agreement, which increased by $1.1 million  to
$4.2 million in 2013 from $3.1 million  in  2012. Research funding  decreased by $0.2 million  in 2013
compared to 2012.

General and administrative expenses

General and administrative expenses  increased by $1.1  million,  or  6.9%, to $16.8  million for the

year ended December 31, 2013 compared to $15.7 million for the year ended  December 31,  2012. The
increase was attributable to an increase  of $1.6  million  as a result of general  and administrative
headcount growing from 10 at the end  of 2012 to 15  at the  end of 2013.  Insurance,  meetings, and
facilities-related expenses increased $1.6  million as total Company-wide  headcount grew from 46  at
December 31, 2012 to 64 at December  31, 2013  and  because of increased operating  costs as  a result of
becoming a public company. Professional  fees  remained relatively flat  as fees related to negotiating  the
Baxter agreement in 2012 were replaced by fees related to being a  public company  in 2013. These
increases in general and administrative expenses were offset by a decrease  of  $2.4 million in stock-
based compensation which was primarily the result  of  a change in  accounting method  during  2013.

Research and development expenses

Research and development expenses decreased by $2.6  million, or 4.9%, to $50.2 million for the

year ended December 31, 2013 compared to $52.8 million for the year ended  December 31,  2012. This
decrease was driven primarily by a $12.5  million milestone paid to Temple University as  a result of
entering into the Baxter agreement and a  $1.0 million payment to LLS in  2012, as well  as a decrease in
stock-based compensation of $3.5 million  in  2013 compared  to  2012 due  primarily  to  a change in
accounting method during 2013. These  decreases were partially offset by  an increase in  pre-clinical  and
clinical trial expenses of $6.3 million; an increase of $4.2 million related to a change in research and
development headcount to 46 at December  31, 2013  from 36 at  December  31, 2012;  an increase of
$3.0 million in manufacturing, formulation,  and development  costs; and  an  increase of $0.9  million
related to consulting services in connection with clinical development.

Change in fair value of warrant liability

The fair value of the warrant liability  decreased by $42,000  during  the year  ended December 31,

2013 compared to a decrease of $0.4  million  during  the year  ended December 31, 2012,  which in  both
cases resulted in a commensurate increase in  other income.  The decrease in the fair value of the
warrant liability in 2013 was primarily due  to the revaluation of the warrants outstanding. The decrease
in the fair value of the warrant liability in  2012  was  primarily due  a  decrease of $1.0  million  related to
the expiration of Series G convertible preferred stock warrants  in 2012,  offset by an  increase of
$0.6 million related to the revaluation of  the warrants outstanding.

Interest expense

Interest expense decreased by $8.6 million  during  the year ended December 31, 2013  compared to

the year ended December 31, 2012. In  July 2012, the holders of our convertible notes elected to
convert their outstanding principal and accrued interest into shares of Series I  convertible preferred
stock. At the time of the conversion, there  was $8.2 million in  unamortized contingent beneficial
conversion features that we immediately expensed.

86

Other income, net

Other income, net, decreased by $0.5  million during the year ended  December 31,  2013 compared

to the year ended December 31, 2012.  This decrease  was driven  by a $0.5 million gain recognized on
our  sale of New Jersey state NOL carry  forwards  in 2012.

Comparison of Years Ended December  31,  2012 and 2011

Revenue . . . . . . . . . . . . . . . . . . . . . . .
Operating expenses:

Year ended December 31,

2012

2011

Change

$ 46,190,000

$ 1,487,000

$ 44,703,000

General and administrative . . . . . . . .
Research and development . . . . . . . .

15,707,000
52,762,000

6,436,000
22,624,000

(9,271,000)
(30,138,000)

Total operating expenses . . . . . . . .

68,469,000

29,060,000

(39,409,000)

Loss from operations . . . . . . . . . . . . . .
Change in fair value of warrant liability .
Interest expense . . . . . . . . . . . . . . . . . .
Other income (expense), net . . . . . . . . .

(22,279,000)
367,000
(8,608,000)
608,000

(27,573,000)
1,287,000
(19,000)
11,000

Net loss before income taxes . . . . . . . . .
Income taxes . . . . . . . . . . . . . . . . . . . .

(29,912,000)
—

(26,294,000)
—

5,294,000
(920,000)
(8,589,000)
597,000

(3,618,000)
—

Net  loss . . . . . . . . . . . . . . . . . . . . . . . .

$(29,912,000) $(26,294,000) $ (3,618,000)

Revenues

Revenues increased by $44.7 million  in 2012 when  compared to 2011  primarily  as a result of
entering into the Baxter agreement in  2012. Of this  increase, $42.4 million related to the value ascribed
to the license, and was therefore recognized immediately  upon signing of the  Baxter agreement,  and
$3.1 million related to the portion of  development services revenue  recognized in 2012 under the
Baxter agreement. Those increases attributable to the Baxter agreement  were partially offset by a
$1.1 million reduction in research funding.

General and administrative expenses

General and administrative expenses  increased by $9.3 million, or  144.0%, to $15.7 million for the
year ended December 31, 2012 from $6.4  million for  the year  ended December 31, 2011. The increase
was primarily attributable to an increase of $7.2 million  related to stock-based  compensation due to the
increase in the fair value of our common  stock  during the  year, an increase of $1.7 million in
professional fees related to the negotiation of the Baxter agreement in 2012, and an increase  of
$0.4 million as a result of the increase  in general and administrative headcount  from six at the end of
2011 to nine at the end of 2012.

Research and development expenses

Research and development expenses increased by  $30.1 million, or 133.0%, to $52.8 million for the
year ended December 31, 2012 from $22.6 million for  the year  ended December 31, 2011.  This increase
was driven by a $12.5 million milestone due  to  Temple, in 2012 as a result of entering into the Baxter
agreement in 2012 compared to a $1.9 million payment to Temple  in 2011  as a result of entering into
the SymBio agreement. The change was  also due to an increase  in clinical trial expenses of $8.4 million
for rigosertib, $6.6 million in additional stock-based compensation due  to the increase in the fair value
of our common stock during the year,  an increase of $1.4 million related to consulting services  in

87

connection with the rigosertib clinical  trials, an  increase of $1.5  million  in nonclinical trial-related costs
for rigosertib and an increase of $0.9  million  related to a  change in research and development
headcount to 36 at the end of 2012 from  25 at the  end of 2011 as a result  of  our  expanded research
and development activities.

Change in fair value of warrant liability

The fair value of the warrant liability  decreased by $0.4 million during the  year ended

December 31, 2012 compared to a decrease of $1.3 million  during the year ended December 31, 2011,
which  in both cases resulted in a commensurate increase  in other income. The decrease  in the fair
value of the warrant liability in 2012 was  primarily due to the  expiration of  Series G  convertible
preferred stock warrants in 2012, which accounted for  a decrease of  $1.0 million  in the value of the
liability, which was partially offset by an  increase of $0.6 million in the  value  of  the liability related  to
the revaluation of  the warrants outstanding. The decrease in  the fair value of the  warrant liability in
2011 was primarily due to the revaluation of  the warrants  outstanding.

Interest expense

Interest expense increased by $8.6 million  during the year ended December 31, 2012 compared to

the year ended December 31, 2011. In  July 2012, the holders of our convertible notes elected to
convert their outstanding principal and accrued interest into shares of Series I  convertible preferred
stock. At the time of the conversion, there  was $8.2 million in  unamortized contingent beneficial
conversion features that we immediately expensed.

Other income, net

Other income, net, increased by $0.6 million during the year ended  December 31,  2012 compared

to the year ended December 31, 2011.  This increase was driven  by a $0.5 million gain recognized on
our  sale of New Jersey state NOL carry  forwards.

Liquidity and Capital Resources

Since our inception, we have incurred net  losses and generally  negative cash flows from our

operations. We incurred net losses of $62.6  million, $29.9  million,  and  $26.3 million  for the  years  ended
December 31, 2013, 2012 and 2011, respectively. Since inception our  accumulated deficit is
$231 million.

Cash Flows

The following table summarizes our cash flows for the  years  ended December  31, 2013, 2012  and

2011:

Year Ended December 31,

2013

2012

2011

Net cash (used in) provided by:

Operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Effect of foreign currency translation  on  cash . . . . . . . .

$(61,384,000) $ 1,633,000
(279,000)
(40,599,000)
77,460,000
80,464,000
—
1,000

$(14,171,000)
(241,000)
9,785,000
—

Net (decrease) increase in cash and cash equivalents . . . . .

$(21,518,000) $78,814,000

$ (4,627,000)

88

Net cash (used in)  provided by operating activities

Net cash used in operating activities  was  $61.4 million  for  the year ended December 31, 2013  and

consisted primarily of a net loss of $62.6  million and a decrease  in deferred  revenue of $4.6 million
related to the recognition of deferred revenue under the Baxter and SymBio  collaboration  agreements.
These were offset by $8.4 million of noncash increases primarily  related  to stock  compensation  expense
of $8.0 million and depreciation of $0.4 million. The cash used in operating activities  was  also impacted
by the changes in operating assets and liabilities  including an  increase in  prepaid expenses and other
current assets of $2.7 million which was the result  of the timing of expense recognition and  payments to
our  contract research and manufacturing  organizations, and  an  increase of $0.1  million  in accounts
payable and accrued expenses, which was primarily  due to the  timing of our payments of clinical  trial
costs related to the ongoing trials and  development  of  our  product candidates.

Net cash provided by operating activities  was  $1.6 million for the year ended December 31,  2012

and consisted primarily of noncash increases  of $22.0 million and  a $9.6  million increase related to the
change in operating assets and liabilities  that were offset  by a net loss of $29.9 million. The noncash
increases were primarily attributable to increases in stock-based compensation and  recognition of debt
discounts and beneficial conversion features of $8.2 million upon conversion of our convertible
promissory notes into preferred stock.  The significant  items in  the change in  operating assets  and
liabilities included an increase in prepaid expenses and  other current  assets of $1.1  million, offset by
increases in accrued expenses of $2.6  million and  an increase in deferred  revenues of $8.2 million.  The
increase in prepaid expenses and other current  assets was primarily due to the prepayment of  upfront
costs for our Phase 3 clinical trials and continued development activities. The increase in  accrued
expenses was primarily due to the costs  for our Phase 3 clinical trial  activities. The  increase in deferred
revenues was primarily due to the receipt of payments  from Baxter and LLS of  $7.6 million and
$4.1 million, respectively, pursuant to the terms of  our  agreements  with such parties. These increases
were partially offset by the recognition  of  the  unamortized portions of upfront  payments under our
collaboration agreements with Baxter and SymBio for $3.1 million and $0.5  million, respectively.

Net cash used in investing activities

Net cash used in investing activities for  the years ended December 31,  2013 and  2012 was
$40.6 million and $0.3 million, respectively.  Cash used in investing  activities during 2013 consisted of
the purchases of marketable securities  of  $40.0 million and purchases  of  fixed  assets of $0.6  million.
Cash used in investing activities during  2012 consisted  primarily  of  purchases  of fixed assets.

Net cash provided by financing activities

Net cash provided by financing activities was  $80.5 million  for  the year ended December 31, 2013,
which  was primarily due to $79.8 million  in net proceeds from the IPO, the $0.5 million  investment by
our  collaboration partner, GVK, and $0.2 million  in proceeds  upon the  exercise of stock options.

Net cash provided by financing activities was  $77.5 million  for  the year ended December 31, 2012,

which  was primarily due to $47.8 million  in proceeds  from the issuance of Series J  convertible
preferred stock in  connection with the  Baxter equity investment, $25.8 million  in proceeds upon  the
issuance of convertible debt that was subsequently converted into shares of Series  I convertible
preferred stock, $2.2 million in proceeds upon the exercise  of warrants in exchange for  shares of
Series G convertible preferred stock,  $0.4  million in proceeds from collection  of  a subscription
receivable for our issuance of Series H  convertible preferred stock and $1.3  million in proceeds  upon
the exercise of stock options.

89

Operating and Capital Expenditure Requirements

We  have not achieved profitability since our inception and we expect to continue to incur net
losses for the foreseeable future. We expect our cash expenditures to increase in the  near term as  we
fund our Phase 2 and Phase 3 clinical trials of rigosertib, as well  as our clinical trials of our other
earlier-stage product candidates and continuing preclinical activities.

On July 30, 2013, we completed our  IPO. We received net  proceeds of  $79.8 million  from the sale,

net of underwriting discounts and commissions and other estimated  offering expenses.

As a publicly traded company, we have  incurred and will continue  to  incur  significant legal,
accounting and other expenses that we were not required to incur as a private  company. In addition,
the Sarbanes-Oxley Act of 2002, as well as  rules adopted by  the SEC and the NASDAQ Stock  Market,
require public companies to implement  specified corporate governance practices  that  are currently
inapplicable to us  as a private company. We expect  these rules and regulations will increase our legal
and financial compliance costs and will make some activities more  time-consuming and costly.  We
estimate that we will incur approximately  $2.0 million to $3.0 million of  incremental costs per year
associated with being a publicly traded company, although it is possible that our actual incremental
costs will be higher than we currently estimate.

We  believe that our existing capital resources, together with the net proceeds from our IPO, will

be sufficient to fund our operations for  at  least the next 12 months.  However, we anticipate that we
will need to raise substantial additional financing  in the future to fund our operations. In  order  to  meet
these additional cash requirements, we may  seek to sell additional equity or  convertible debt securities
that may result in dilution to our stockholders. If we raise  additional funds through  the issuance of
convertible debt securities, these securities could have rights senior  to  those  of  our  common stock and
could contain covenants that restrict our operations.  There can be no assurance that we will be able to
obtain additional equity or debt financing  on  terms acceptable to us, if at  all.  Further,  the achievement
of milestones and receipt from Baxter  and SymBio of milestone payments and royalties,  even  if
rigosertib is approved for commercial  use  in Baxter’s and SymBio’s licensed territories, are  not  assured.
Our failure to obtain sufficient funds on acceptable terms  when needed could have a  negative  impact
on our business, results of operations, and financial  condition. Our  future capital  requirements will
depend  on many factors, including:

(cid:127) the results of our Phase 2 and Phase 3 clinical trials;

(cid:127) whether Baxter and SymBio continue to pursue or  terminate our  collaboration arrangements for

the development and commercialization of rigosertib  in their licensed territories;

(cid:127) the amount and timing of any milestone payments or royalties we may  receive pursuant to our

collaboration arrangements;

(cid:127) the number and characteristics of any  other  product candidates we develop or  may acquire;

(cid:127) the scope, progress, results and costs of researching and developing our product  candidates or

any future product candidates, and conducting preclinical and clinical  trials;

(cid:127) the timing of, and the costs involved in, obtaining regulatory approvals for our product

candidates or any future product candidates;

(cid:127) the cost of commercialization activities  if  any future product  candidates are approved for sale,

including marketing, sales and distribution costs;

(cid:127) the cost of manufacturing rigosertib and our other  product candidates  and any products that

may achieve regulatory approval;

90

(cid:127) our ability to establish and maintain strategic collaborations, licensing or  other  arrangements and

the financial terms of such agreements;

(cid:127) any product liability or other lawsuits  related to our products;

(cid:127) the expenses needed to attract and retain skilled personnel;

(cid:127) the costs associated with being a public  company;

(cid:127) the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing patent

claims, including litigation costs and  the outcome of  such litigation; and

(cid:127) the timing, receipt and amount of sales of, or  royalties on, future  approved products, if any.

If we  are unable to successfully raise  sufficient additional capital, through future debt or  equity
financings, product sales, or through strategic and collaborative ventures with third parties, we will  not
have sufficient cash flows and liquidity  to  fund our planned business operations. In that event, we may
be forced to limit many, if not all, of our programs and consider other means of creating  value for our
stockholders, such as licensing to others the development  and commercialization of products  that  we
consider valuable and would otherwise  likely develop ourselves.  If we are unable to raise the  necessary
capital, we may be forced to curtail all  of our activities and, ultimately,  potentially cease operations.
Even if we are able to raise additional  capital,  such financings may  only be  available on unattractive
terms, or could result in significant dilution of stockholders’ interests. The condensed  consolidated
financial statements do not include any adjustments relating to recoverability  and classification of
recorded  asset amounts or the amounts and classification of liabilities  that might  be  necessary  should
we be unable to continue in existence.

Please see ‘‘Risk Factors’’ for additional risks associated with our substantial  capital requirements.

Contractual Obligations and Commitments

The following is a summary of our long-term contractual cash obligations as of December  31, 2013:

Operating lease obligations . . . . . . . . . . . . . . . . .

$284,000

$245,000

$39,000

Total contractual obligations . . . . . . . . . . . . . . . .

$284,000

$245,000

$39,000

Total

Less than
one year

1 - 3
Years

3 - 5
Years

$—

$—

More  than
5 Years

$—

$—

Purchase Commitments

We  have no material non-cancelable purchase commitments with contract manufacturers or service

providers as we have generally contracted on a cancelable purchase order  basis.

Milestone, Royalty-Based and Other Commitments

Under our license agreement with Temple to develop,  manufacture, market  and sell rigosertib
related compounds and derivatives, we  are obligated to pay annual license maintenance payments, as
well as 25% of any sublicensing fees we  receive. We are  also required to pay a low-single digit
percentage of our  net sales of rigosertib as  a royalty. During the year ended December 31,  2011, in
connection with the execution of the SymBio  agreement,  we made a payment to Temple in the amount
of $1.9 million. During the year ended  December 31, 2012, in connection with the execution of the
Baxter agreement, we became obligated to make a  payment to Temple in  the amount of $12.5 million.
Both of these payments were recorded as  research and development expenses.

In May 2010, we entered into an agreement with  LLS under which we were to conduct research in

return  for milestone payments, up to $10.0  million through 2013. This milestone payment amount was

91

subsequently reduced to $8.0 million pursuant to an amendment signed in  January 2013. In the event
that the research is successful, we must  proceed with commercialization of the  product or  repay the
amount funded. In addition, we will owe to LLS  regulatory and commercial milestone  payments and
royalties based on net sales of the product not to exceed three times the aggregate amount funded, or
$24.0 million. During the year ended December 31,  2012, in connection with the  execution  of the
Baxter agreement, we paid $1.0 million to LLS  and we have recorded  this amount in research and
development expenses. This payment reduced the maximum contingent  payment obligation under this
agreement to $23.0 million at December 31, 2012, and there were no changes during  the year  ended
December 31, 2013.

Because the achievement and timing  of these  milestones and net sales is  not  fixed  and

determinable, our commitments under  these  agreements have not been included  on our consolidated
balance sheets or in the Contractual  Obligations table above.

Off-Balance Sheet Arrangements

We  do not have any off-balance sheet arrangements, as defined by applicable SEC regulations.

Segment Reporting

We  view our operations and manage our business in one segment,  which is  the identification and

development of oncology therapeutics.

Recent  Accounting Pronouncements

In February 2013, the Financial Accounting Standards  Board (the ‘‘FASB’’) amended its guidance

to require an entity to present the effect  of certain significant reclassifications  out of accumulated other
comprehensive income on the respective line  items in  net income.  The new  accounting guidance does
not change the items that must be reported in  other comprehensive  income  or when an  item of  other
comprehensive income must be reclassified to net income. The guidance is effective prospectively for
fiscal years beginning after December  15, 2012.  The Company  adopted these new  provisions for the
quarter beginning January 1, 2013. As the  guidance requires additional presentation only, there was no
impact to the Company’s consolidated financial  position, results  of operations or cash flows.

In July 2013, the FASB issued guidance clarifying  that  an unrecognized tax benefit,  or a portion  of

an unrecognized tax benefit, should be presented in  the financial statements as  a reduction to a
deferred tax asset for a net operating loss  carryforward, a similar tax loss, or a  tax credit carryforward if
such settlement is required or expected  in the event the uncertain tax benefit is  disallowed. In
situations where a net operating loss  carryforward, a  similar tax  loss, or a tax credit  carryforward is  not
available at the reporting date under the tax law of the  applicable  jurisdiction  or the tax law of the
jurisdiction does not require, and the entity does not  intend  to  use, the deferred tax  asset for  such
purpose, the unrecognized tax benefit  should be presented in the financial statements as a liability and
should not be netted with the deferred  tax asset. The guidance is effective for  fiscal  years,  and interim
periods within those years, beginning  after December 15, 2013. Early adoption is permitted. The
guidance is to be applied prospectively  to  all unrecognized tax  benefits that exist  at the effective  date.
Retrospective application is permitted.  The Company is currently evaluating the impact that adoption
will have on the determination or reporting of its financial results.

92

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We  are exposed to market risks in the ordinary  course of our business.  These market risks are

principally limited to interest rate fluctuations.

We  had cash, cash equivalents and marketable securities of $100.0 million at December  31, 2013,

consisting primarily of funds in cash,  money  market  accounts and  US  treasury notes. The primary
objective of our investment activities is to preserve principal  and  liquidity while maximizing income
without significantly increasing risk. We do not enter into investments for  trading or  speculative
purposes. Due to the short-term nature  of our investment  portfolio, we do  not  believe an immediate
10% increase or decrease in interest rates would  have a  material effect  on  the fair market value of our
portfolio, and accordingly we do not  expect  our  operating results  or cash flows to be materially affected
by a sudden change in market interest rates.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The financial statements and supplementary data required by this item  are listed in Item  15—

‘‘Exhibits and Financial Statement Schedules’’ of this  Annual Report.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH  ACCOUNTANTS  ON ACCOUNTING  AND

FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and  Procedures

Our management, with the participation of our Chief Executive  Officer and our Chief Financial
Officer, evaluated the effectiveness of  our disclosure controls  and procedures as of December  31, 2013.
The term ‘‘disclosure controls and procedures,’’ as defined in Rules 13a-15(e) and 15d-15(e)  under the
Securities Exchange Act of 1934, as amended (the ‘‘Exchange Act’’), means controls and other
procedures of a company that are designed to ensure that information required to be disclosed by a
company in the reports that it files or  submits under the  Exchange Act is  recorded, processed,
summarized and reported, within the time periods specified in  the SEC’s rules and forms.  Disclosure
controls and procedures include, without  limitation, controls  and  procedures designed to ensure  that
information required to be disclosed  by  a  company in  the reports that  it files  or submits under  the
Exchange Act is accumulated and communicated to the  company’s management,  including its principal
executive and principal financial officers, as appropriate to allow timely decisions  regarding required
disclosure. Based on the evaluation of  our disclosure controls and procedures as of December 31,  2013,
our  Chief Executive Officer and Chief  Financial Officer  concluded that,  as of such date,  disclosure
controls and procedures were not effective at  the reasonable assurance  level because of the material
weakness in internal control over financial  reporting described below.

Internal Control Over Financial Reporting

In preparing our consolidated financial  statements as of and for  the year  ended December 31,

2012, we and our independent registered public accounting firm  identified  control  deficiencies in the
design and operation of our internal control over financial  reporting  that together constituted  a
material weakness in our internal control  over financial  reporting. A material weakness is  a deficiency,
or a combination of deficiencies, in internal  control over financial reporting such that there  is a
reasonable possibility that a material misstatement of our financial statements will not be prevented or
detected on a timely basis. The material weakness identified  was that  we  did not have sufficient
financial reporting and accounting staff  with  appropriate  training in  GAAP  and SEC  rules and

93

regulations with respect to financial reporting.  As such,  our controls over financial reporting were not
designed or operating effectively, and as  a result  there were  adjustments required in connection  with
closing our books and records and preparing our 2012 consolidated  financial  statements.

We  have discussed this material weakness with our  independent registered  public accounting  firm

and our Audit Committee. To remediate  this material weakness, we have expanded our staff  by  hiring  a
Chief Financial Officer, a Director of  Financial Reporting and a  Vice President of Financial Planning
and Accounting, each with prior public  company financial reporting experience. We have also  hired
additional finance and accounting personnel with appropriate training to build our financial
management and reporting infrastructure.  We have initiated processes  to  further develop and  document
our  accounting policies and financial  reporting procedures and to implement  additional internal
controls. Although, we believe we have  made improvements in our  disclosure  controls and  procedures,
as of  our December 31, 2013 financial closing process  we had not yet fully  remediated the material
weakness discussed above. In addition,  we  cannot provide assurance that we  have identified all of our
existing material weaknesses, or that  we  will  not  in the future have additional material weaknesses.

Neither we nor our independent registered public  accounting firm has  performed an  evaluation of
our  internal control over financial reporting during any period in accordance  with the provisions of the
Sarbanes-Oxley Act. In light of the control deficiencies and  the resulting  material  weakness  that  were
identified as a result of the limited procedures  performed, we believe  that  it is possible  that  had we and
our  independent registered public accounting firm  performed  an  evaluation of our internal control over
financial reporting in accordance with  the provisions of the  Sarbanes-Oxley Act, additional  material
weaknesses and significant control deficiencies  may  have been  identified. However,  for as  long as  we
remain an ‘‘emerging growth company’’  as defined  in the JOBS Act, we intend  to  utilize the provision
exempting us from the requirement that our independent registered  public accounting  firm  provide an
attestation on the effectiveness of 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 the  company’s registered public accounting
firm due to a transition period established by rules of the  Securities and Exchange  Commission for
newly public companies.

Changes  in Internal Control Over Financial Reporting

There has been no change in our internal control over financial reporting during the last fiscal
quarter that has materially affected,  or is reasonably likely to materially affect, our  internal control over
financial reporting.

ITEM 9B. OTHER INFORMATION

None.

94

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Information with respect to this item is  set forth in  the Proxy Statement for  the 2014 Annual

Meeting of Stockholders (the ‘‘Proxy Statement’’) under  the headings ‘‘Election of Directors,’’
‘‘Executive Officers,’’ ‘‘Section 16(a) Beneficial Ownership Reporting Compliance,’’ ‘‘Code of Ethics’’
and  ‘‘Corporate Governance’’ and is  incorporated herein by reference. The Proxy Statement will be
filed  with the SEC within 120 days after the  end of  the fiscal year covered by this Annual Report.

ITEM 11. EXECUTIVE COMPENSATION

Information with respect to this item is  set forth in  the Proxy Statement under the  headings

‘‘Executive Compensation’’ and ‘‘Director Compensation,’’ and is incorporated herein by reference. The
Proxy Statement will be filed  with the SEC within 120 days after the end  of the fiscal  year covered by
this Annual Report.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND  MANAGEMENT  AND

RELATED STOCKHOLDER MATTERS

Information with respect to this item is  set forth in  the Proxy Statement under the  headings
‘‘Security Ownership of Certain Beneficial Owners and  Management’’ and ‘‘Executive  Compensation,’’
and  is incorporated herein by reference. The  Proxy Statement will  be  filed with  the SEC within
120 days after the end of the fiscal year covered by this Annual Report.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND  DIRECTOR

INDEPENDENCE

Information with respect to this item is  set forth in  the Proxy Statement under the  headings

‘‘Certain Relationships and Related Party Transactions’’ and  ‘‘Corporate  Governance’’ and is
incorporated herein by reference. The Proxy Statement will be filed with  the SEC within  120 days after
the end of the fiscal year covered by this Annual Report.

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

Information with respect to this item is  set forth in  the Proxy Statement under the  heading

‘‘Ratification  of the Selection of Independent Registered  Public  Accounting Firm,’’  and is incorporated
herein  by reference. The Proxy Statement will be filed with the  SEC within  120 days after  the end of
the fiscal year covered by this Annual Report.

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a) (1) Financial Statements: See Index to Consolidated Financial  Statements on page  F-1.

(3) Exhibits:  See  Exhibits  Index  on  pages  98  to  101.

95

Pursuant to the requirements of Section  13  or 15(d) of the Securities Exchange Act of 1934, the

registrant has duly caused this report to be signed on its  behalf  by the undersigned,  thereunto duly
authorized.

SIGNATURES

Onconova Therapeutics, Inc.

Date: March 20, 2014

By:

/s/ RAMESH KUMAR

Ramesh Kumar
Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has  been signed

below by the following persons on behalf of  the registrant and in the capacities  and on the dates
indicated:

Signature

Title

Date

/s/ RAMESH KUMAR, PH.D.

Ramesh Kumar, Ph.D.

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

March 20, 2014

/s/ AJAY BANSAL

Ajay Bansal

Chief Financial Officer
(Principal Financial Officer)

March 20, 2014

/s/ JAMES R. ALTLAND

James R. Altland

Senior Vice President, Finance &
Corporate Development
(Principal Accounting Officer)

March 20, 2014

/s/ MICHAEL B. HOFFMAN

Michael B. Hoffman

/s/ HENRY S. BIENEN, PH.D.

Henry S. Bienen, Ph.D.

/s/ JEROME E. GROOPMAN, M.D.

Jerome E. Groopman, M.D.

/s/ VIREN MEHTA

Viren Mehta

Chairman, Board of Directors

March  20, 2014

March 20, 2014

March 20, 2014

March 20, 2014

Director

Director

Director

96

Signature

Title

Date

/s/ E. PREMKUMAR REDDY, PH.D.

E. Premkumar Reddy, Ph.D.

Director

March 20, 2014

/s/ ANNE M.  VANLENT

Anne M. VanLent

Director

March 20, 2014

97

Exhibit
Number

Exhibits Index

Exhibit Description

3.1

3.2

4.1

4.2

4.3

Tenth Amended and Restated Certificate of Incorporation of Onconova Therapeutics, Inc.
(Incorporated by reference to Exhibit 3.1  to the Company’s  Current Report on Form 8-K filed
on July 25, 2013).

Amended and Restated Bylaws  of Onconova Therapeutics, Inc. (Incorporated by reference
to Exhibit 3.1 to the Company’s Current  Report on Form  8-K filed on  July 25, 2013).

Form of Certificate of Common  Stock (Incorporated by reference to Exhibit 4.1 to
Pre-Effective Amendment No. 1 the Company’s Registration Statement on Form  S-1  filed  on
July 11, 2013.)

Eighth Amended and Restated  Stockholders’ Agreement, effective as of July  27, 2012, by
and among Onconova Therapeutics, Inc. and certain stockholders named therein
(Incorporated by reference to Exhibit 4.2to Pre-Effective Amendment No.  1 to  the Company’s
Registration Statement on Form S-1 filed on July 11, 2013).

Amendment No. 1 to Eighth Amended and Restated  Stockholders’ Agreement,  effective
as of July 9, 2013 (Incorporated by reference to Exhibit 4.2  to  Pre-Effective  Amendment No. 1
the Company’s Registration Statement on Form  S-1  filed  on July  11, 2013).

10.1* Development and License Agreement, effective as of September  19, 2012, by and between
Onconova Therapeutics, Inc. and Baxter Healthcare SA (Incorporated by reference to
Exhibit 10.1 to Pre-Effective Amendment  No. 2 the  Company’s Registration Statement on
Form S-1 filed on July 18, 2013).

10.2*

10.3*

10.4*

License Agreement, effective as of July 5,  2011, by and between Onconova
Therapeutics, Inc. and SymBio Pharmaceuticals Limited (Incorporated by reference to
Exhibit 10.2 to Pre-Effective Amendment  No. 2 the  Company’s Registration Statement on
Form S-1 filed on July 18, 2013).

First Amendment to License  Agreement,  effective as of September 2,  2011, by and
between Onconova Therapeutics, Inc.  and SymBio Pharmaceuticals Limited (Incorporated
by reference to Exhibit 10.3 to the Company’s Registration Statement on Form S-1 filed on
June 14, 2013).

License Agreement, effective as of January 1, 1999, by and  between Onconova
Therapeutics, Inc. and Temple University—Of The Commonwealth System of Higher
Education (Incorporated by reference to Exhibit 10.4 to  the Company’s  Registration Statement
on Form S-1 filed on June 14, 2013).

10.5* Amendment to License Agreement, effective as of September  1, 2000, by and between

Temple University—Of The Commonwealth System of Higher Education and Onconova
Therapeutics, Inc. (Incorporated by reference to Exhibit 10.5 to  the Company’s  Registration
Statement on Form S-1 filed on June 14, 2013).

10.6* Amendment #1 to Exclusive License Agreement, effective as of March  21, 2013, by and

between Temple University—Of The Commonwealth  System of Higher  Education and
Onconova Therapeutics, Inc. (Incorporated by reference to Exhibit 10.6  to the  Company’s
Registration Statement on Form S-1 filed on June 14, 2013).

10.7* Definitive Agreement, effective  as of May 12, 2010, by and between Onconova

Therapeutics, Inc. and The Leukemia and Lymphoma  Society (Incorporated by reference to
Exhibit 10.7 to the Company’s Registration Statement on Form S-1 filed on June 14, 2013).

98

Exhibit
Number

10.8*

Exhibit Description

First Amendment to Definitive Agreement, effective as of June 23,  2011, by and  between
Onconova Therapeutics, Inc. and The Leukemia and  Lymphoma  Society (Incorporated by
reference to Exhibit 10.8 to the Company’s Registration Statement  on Form S-1 filed on
June 14, 2013).

10.9*

Second Amendment to Definitive  Agreement, effective as of May 29, 2012, by and
between Onconova Therapeutics, Inc. and The Leukemia and Lymphoma Society
(Incorporated by reference to Exhibit 10.9 to  the Company’s  Registration Statement on
Form S-1 filed on June 14, 2013).

10.10* Third Amendment to Definitive Agreement,  effective  as of January 5, 2013,  by  and

between Onconova Therapeutics, Inc. and The Leukemia and Lymphoma Society
(Incorporated by reference to Exhibit 10.10 to  the Company’s  Registration Statement on
Form S-1 filed on June 14, 2013).

10.11

10.12*

Termination of Agreement, effective  as of February 5, 2013,  by and between  Onconova
Therapeutics, Inc. and The Leukemia and Lymphoma  Society (Incorporated by reference  to
Exhibit 10.11 to the Company’s Registration Statement on  Form S-1 filed on  June 14, 2013).

Limited Liability Company Agreement of GBO, LLC, dated as  of  December 12, 2012, by
and between Onconova Therapeutics,  Inc. and GVK Biosciences Private Limited
(Incorporated by reference to Exhibit 10.12 to  the Company’s  Registration Statement on
Form S-1 filed on June 14, 2013).

10.13+ Onconova Therapeutics, Inc.  2007 Equity  Compensation Plan, and  forms of agreement

thereunder (Incorporated by reference to Exhibit 10.13 to Pre-Effective Amendment No. 1 the
Company’s Registration Statement on Form S-1 filed on July  11, 2013).

10.14+ Employment Agreement, effective as of April 1, 2007, by  and  between Onconova

Therapeutics, Inc. and Ramesh Kumar,  Ph.D., including extension letter, dated April 10,
2010, and Employment Agreement Renewal, dated January 10, 2013 (Incorporated by
reference to Exhibit 10.14 to the Company’s Registration Statement  on Form S-1 filed on
June 14, 2013).

10.15+ Amendment to Employment Agreement, effective as of  December 21, 2012, by and

between Onconova Therapeutics, Inc. and Ramesh Kumar,  Ph.D. (Incorporated by reference
to Exhibit 10.15 to the Company’s Registration Statement on Form S-1 filed on  June 14,
2013).

10.16+ Employment Agreement, effective as of September 1, 2012, by and between Onconova

Therapeutics, Inc. and Thomas McKearn, M.D., Ph.D.  (Incorporated by reference to
Exhibit 10.16 to the Company’s Registration Statement on Form S-1 filed on  June 14, 2013).

10.17+ Amendment to Employment Agreement, effective as of April 9,  2013, by and between

Onconova Therapeutics, Inc. and Thomas  McKearn,  M.D., Ph.D.  (Incorporated by reference
to Exhibit 10.17 to the Company’s Registration  Statement  on Form S-1 filed on  June 14,
2013).

10.18+ Employment Agreement, effective as  of April 17, 2008, by  and  between Onconova
Therapeutics, Inc. and Fran¸cois Wilhelm, M.D., including Employment Agreement
Renewals, dated March 30, 2010 and January 10, 2013 (Incorporated by reference to
Exhibit 10.18 to the Company’s Registration Statement on Form S-1 filed on  June 14, 2013).

99

Exhibit
Number

Exhibit Description

10.19+ Amendment to Employment Agreement, effective as of  December 21, 2012, by and
between Onconova Therapeutics, Inc.  and Francois Wilhelm, M.D. (Incorporated by
reference to Exhibit 10.19 to the Company’s Registration Statement  on Form S-1 filed on
June 14, 2013).

10.20+ Employment Agreement, effective as of January  1, 2007, by and between Onconova

Therapeutics, Inc. and Dr. Manoj Maniar,  including Employment  Agreement Renewals,
dated March 30, 2010 and January 10, 2013 (Incorporated by reference to Exhibit 10.20  to
the Company’s Registration Statement on Form S-1 filed on June 14,  2013).

10.21+ Amendment to Employment Agreement, effective as of  December 21, 2012, by and

between Onconova Therapeutics, Inc. and Dr. Manoj Maniar  (Incorporated by reference to
Exhibit 10.21 to the Company’s Registration Statement on  Form S-1 filed on  June 14, 2013).

10.22+ Employment Agreement, effective as of March 20, 2013,  by and between Onconova
Therapeutics, Inc. and Ajay Bansal (Incorporated by reference to Exhibit 10.22 to  the
Company’s Registration Statement on Form S-1 filed on June 14,  2013).

10.23+ Consulting Agreement, effective as of January 1, 2012,  by and between Onconova

Therapeutics, Inc. and E. Premkumar Reddy,  Ph.D., including Consultant Agreement
Renewal, dated February 27, 2013 (Incorporated by reference to Exhibit 10.23 to  the
Company’s Registration Statement on Form S-1 filed  on June 14, 2013).

10.24+ Form of Indemnification Agreement entered into by and between Onconova

Therapeutics, Inc. and [each](1) director  and  executive officer (Incorporated by reference to
Exhibit 10.24 to Pre-Effective Amendment No.  1 the Company’s Registration Statement on
Form S-1 filed on July 11, 2013).

10.25+ Onconova Therapeutics, Inc.  2013 Equity  Compensation Plan, and  forms of agreement

thereunder (Incorporated by reference to Exhibit 10.25 to Pre-Effective Amendment No. 1 the
Company’s Registration Statement on Form S-1 filed on July  11, 2013).

10.26+ Onconova Therapeutics, Inc.  2013 Performance Bonus  Plan (Incorporated by reference to
Exhibit 10.26 to Pre-Effective Amendment  No. 1 the  Company’s Registration Statement on
Form S-1 filed on July 11, 2013).

21.1

23.1

23.2

31.1

31.2

32.1

32.2

Subsidiaries of Onconova Therapeutics, Inc.

Consent of Ernst & Young, LLP.

Consent of Eisner Amper, LLP.

Certification of Principal Executive Officer  pursuant to Section  302 of the Sarbanes-Oxley
Act of 2002.

Certification of Principal Financial Officer  pursuant to Section 302 of the  Sarbanes-Oxley
Act of 2002.

Certification of Principal Executive Officer  pursuant to 18  U.S.C. Section 1350  as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Certification of Principal Financial Officer  pursuant to 18 U.S.C. Section 1350 as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101.INS

XBRL Instance

101.SCH

XBRL Taxonomy Extension Schema  Document

100

Exhibit
Number

Exhibit Description

101.CAL

XBRL Taxonomy Extension  Calculation Linkbase Document

101.DEF

XBRL Taxonomy Extension  Calculation Linkbase Document

101.LAB

XBRL Taxonomy Extension Labels Linkbase Document

101.PRE

XBRL Taxonomy Extension  Presentation Linkbase  Document

+ Indicates management contract or compensatory  plan.

*

Confidential treatment has been requested with respect to certain portions  of  this  exhibit. Omitted
portions have been filed separately with the  Securities and  Exchange Commission.

101

ONCONOVA THERAPEUTICS, INC. AND  SUBSIDIARIES

Index to Consolidated Financial Statements

Report of Independent Registered Public Accounting  Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Report of Independent Registered Public Accounting  Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Balance Sheets, December  31, 2013 and 2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Operations,  Years  ended December 31, 2013, 2012  and 2011 . . . . . .
Consolidated Statements of Comprehensive Loss,  Years ended  December 31,  2013, 2012 and

Page

F-2
F-3
F-4
F-5

2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

F-6

Consolidated Statements of Redeemable  Convertible Preferred Stock and  Stockholders’ Equity,

Years ended December 31, 2013, 2012  and  2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Cash Flows,  Years ended  December  31, 2013, 2012 and 2011 . . . . . .
Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

F-7
F-8
F-9

F-1

Report of Independent Registered Public  Accounting Firm

The Board of Directors and Stockholders of  Onconova Therapeutics, Inc.

We  have audited the accompanying consolidated balance sheets of Onconova Therapeutics, Inc. as
of December 31, 2013 and 2012, and  the  related consolidated statements of operations, comprehensive
loss, redeemable convertible preferred stock and stockholders’  equity, and cash  flows  for the  years
ended December 31, 2013 and 2012. These financial statements  are  the responsibility  of  the Company’s
management. Our responsibility is to express an  opinion on  these financial  statements  based on our
audits.

We  conducted our audits in accordance with the standards  of  the Public Company Accounting
Oversight Board (United States). Those  standards require that we  plan and perform the audit to obtain
reasonable assurance about whether  the  financial  statements are free  of material misstatement.  We
were not engaged to perform an audit  of the  Company’s internal control over  financial reporting.  Our
audits included consideration of internal  control  over financial reporting  as a basis for  designing audit
procedures that are appropriate in the circumstances, but  not  for the  purpose of expressing an opinion
on the effectiveness of the Company’s  internal control over financial reporting. Accordingly, we express
no such opinion. An audit also includes  examining,  on a test basis,  evidence supporting  the amounts
and disclosures in  the financial statements, assessing  the accounting principles used and significant
estimates made by management, and  evaluating the  overall consolidated  financial  statement
presentation. We believe that our audits provide  a reasonable basis for  our  opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects,
the consolidated financial position of  Onconova Therapeutics, Inc. at  December  31, 2013 and 2012,  and
the consolidated results of its operations and its cash  flows for the years ended December 31, 2013  and
2012, in conformity with U.S. generally  accepted accounting principles.

Philadelphia, Pennsylvania
March 20, 2014

/s/ Ernst & Young LLP

F-2

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders
Onconova Therapeutics, Inc.

We  have audited the statements of operations and comprehensive loss,  redeemable  convertible

preferred stock and stockholders’ deficit,  and cash flows for  the year ended December 31,  2011. The
financial statements are the responsibility  of the Company’s  management. Our responsibility is  to
express an opinion on these financial statements based on our  audit.

We  conducted our audit in accordance with the standards of  the Public Company Accounting
Oversight Board (United States). Those  standards require that we  plan and perform the audit to obtain
reasonable assurance about whether  the  financial  statements are free  of material misstatement.  The
Company is not required to have, nor were we  engaged to perform,  an  audit of  its internal control over
financial reporting. Our audit included  consideration of  internal  control over financial reporting as a
basis for designing audit procedures that  are  appropriate in the circumstances,  but not for the purpose
of expressing an opinion on the effectiveness of the Company’s internal control over  financial  reporting.
Accordingly, we express no such opinion. An audit includes examining, on a  test basis, evidence
supporting the amounts and disclosures  in the financial statements.  An audit  also includes  assessing the
accounting principles used and significant estimates made  by  management, as  well as evaluating the
overall financial statement presentation.  We believe that  our  audit provides a reasonable basis for  our
opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects,
the results of the Company’s operations and its cash  flows for the year ended December 31, 2011,  in
conformity with accounting principles  generally  accepted in the United States of America.

Iselin,  New Jersey
May 2, 2013,  except for the third paragraph of Note 18, as to which  the date is July  17, 2013

/s/ EISNERAMPER LLP

F-3

Onconova Therapeutics, Inc.

Consolidated Balance Sheets

December 31,

2013

2012

Assets
Current assets:

Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Marketable securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other current assets . . . . . . . . . . . . . . . . . . . .

$ 60,009,000
39,994,000
4,387,000

$ 81,527,000
—
1,725,000

Total current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Property and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restricted cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other non-current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

104,390,000
626,000
125,000
12,000

83,252,000
463,000
125,000
12,000

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 105,153,000

$ 83,852,000

Liabilities, redeemable convertible preferred stock and  stockholders’

equity (deficit)
Current liabilities:

Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued expenses and other current  liabilities . . . . . . . . . . . . . . . . .
Warrant liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

Total current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue, non-current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Commitments and contingencies
Redeemable convertible preferred stock,  $0.01 par value per share,

none and 18,548,253 shares authorized at Decemeber 31, 2013 and
2012, none and 16,912,199 issued and  outstanding at  December 31,
2013 and 2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stockholders’ equity (deficit):

Preferred stock, $0.01 par value, 5,000,000  and  none  authorized  at
December 31, 2013 and 2012, none issued  and outstanding at
December 31, 2013 and 2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Common stock, $0.01 par value, 75,000,000 and 30,145,155

authorized at December 31, 2013 and 2012, 21,467,482 and
2,606,484 shares issued and outstanding at  December  31 2013 and
2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional paid in capital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive income . . . . . . . . . . . . . . . . . . . .
Accumulated deficit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3,710,000
5,820,000
20,000
—
788,000

10,338,000
13,909,000
6,000

24,253,000

$

5,517,000
3,925,000
62,000
11,967,000
3,907,000

25,378,000
15,421,000
44,000

40,843,000

—

201,315,000

—

—

215,000
311,093,000
1,000
(230,896,000)

26,000
10,021,000
—
(168,353,000)

(158,306,000)
—

Total Onconova Therapeutics, Inc. stockholders’ equity (deficit) . . . . . .
Non-controlling interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

80,413,000
487,000

Total stockholders’ equity (deficit) . . . . . . . . . . . . . . . . . . . . . . . . . . .

80,900,000

(158,306,000)

Total liabilities, redeemable convertible preferred stock and

stockholders’ equity (deficit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 105,153,000

$ 83,852,000

See accompanying notes to consolidated financial statements.

F-4

Onconova Therapeutics, Inc.

Consolidated Statements of Operations

Revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating expenses:

Years ended December 31,

2013

2012

2011

$ 4,753,000

$ 46,190,000

$ 1,487,000

General and administrative . . . . . . . . . . . . . . . . . . . . .
Research and development . . . . . . . . . . . . . . . . . . . . . .

16,793,000
50,182,000

15,707,000
52,762,000

6,436,000
22,624,000

Total operating expenses . . . . . . . . . . . . . . . . . . . . . .

66,975,000

68,469,000

29,060,000

Loss from operations . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in fair value of warrant liability . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(62,222,000)
42,000
(4,000)
63,000

(22,279,000)
367,000
(8,608,000)
608,000

(27,573,000)
1,287,000
(19,000)
11,000

Net loss before income taxes . . . . . . . . . . . . . . . . . . . . . .
Income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(62,121,000)
435,000

(29,912,000)
—

(26,294,000)
—

Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net loss attributable to non-controlling  interest . . . . . . . . .

(62,556,000)
13,000

(29,912,000)
—

(26,294,000)
—

Net loss attributable to Onconova Therapeutics, Inc . . . . .
Accretion of redeemable convertible  preferred stock . . . . .

(62,543,000)
(2,320,000)

(29,912,000)
(3,953,000)

(26,294,000)
(4,020,000)

Net loss applicable to common stockholders . . . . . . . . . . .

$(64,863,000) $(33,865,000) $(30,314,000)

Net loss per share of common stock, basic and diluted . . .

$

(6.12) $

(15.35) $

(14.18)

Basic and diluted weighted average shares  outstanding . . .

10,594,227

2,206,888

2,137,403

See accompanying notes to consolidated  financial statements.

F-5

Onconova Therapeutics, Inc.

Consolidated Statements of Comprehensive Loss

Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other comprehensive income, before tax:

Foreign currency translation adjustments, net . . . . . . .

Other comprehensive income, net of  tax . . . . . . . . . . . . . .

Years ended December 31,

2013

2012

2011

$(62,556,000) $(29,912,000) $(26,294,000)

1,000

1,000

—

—

—

—

Comprehensive loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(62,555,000)

(29,912,000)

(26,294,000)

Comprehensive loss attributable to non-controlling

interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13,000

—

—

Comprehensive loss attributable to Onconova

Therapeutics, Inc . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$(62,542,000) $(29,912,000) $(26,294,000)

See accompanying notes to consolidated financial statements.

F-6

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity

Onconova Therapeutics, Inc.

Redeemable Convertible Preferred
Stock

Shares

Amount

Preferred
Stock
Subscribed

Common Stock

Shares

Amount

Additional
Paid in
Capital

Stockholders’ Equity (Deficit)

Accumulated
other

Accumulated
deficit

comprehensive Non-controlling

income

interest

Total

Balance at January 1,
.
.
2011 .
Net loss .
.
.
Issuance of preferred

.
.

.
.

.
.

.
.

.
.

.
.

.
.

10,211,835 $ 105,734,000
—

—

$ 300,000
—

2,068,032 $ 21,000 $

—

—

7,000 $(108,745,000)
(26,294,000)

—

$ —
—

$

stock, net of issuance
.
.
.
costs
Exercise of stock options .
Issuance of preferred

.

.

.

.

.

.

.

819,329
—

7,917,000
—

(300,000)
—

—
99,896

—
1,000

—
611,000

—
—

—

.

.

stock upon exercise of
.
.
warrants

.
Accretion of preferred
stock to redemption
.
.
value .

.

.

.

.

.

.

.

.

Balance at December 31,
.
.

2011 .

.

.

.

.

.

.

Net loss .
.
.
Issuance of preferred

.

.

.

.

.

.

.

.

.

.

stock, net of issuance
.
.
.
costs
Exercise of stock options .
Proceeds from stockholder

.

.

.

.

.

.

.

in connection with
settlement of stock
.
option exercises

.
Settlement of stock option
.

.
Issuance of preferred

liabilities .

.

.

.

.

.

.

.

.

.

.

.

stock upon exercise of
.
.
.
warrants
Exchange of convertible
debt and preferred
.
.
stock .
Beneficial conversion

.

.

.

.

.

.

.

.

.

feature on convertible
.
.
debt

.
.
Accretion of preferred
stock to redemption
.
.
value .

.

.

.

.

.

.

.

.

Balance at December 31,
.
.

2012 .

.

.

.

.

.

.

Net loss .
.
Contribution from

.

.

.

.

.

.

.

non-controlling interest

.

.

.

.

.

.

.

.

.

.

.

income .

Other comprehensive
.

.
.
Exercise of stock options .
Stock-based compensation
Reclassification of stock
option liability .
.
Accretion of preferred
stock to redemption
.
.
.
value .
Conversion convertible
preferred stock into
common stock .
.
Issuance of common

.

.

.

.

.

.

.

.

.

.

.

.

stock, net of issuance
.
.
costs

.

.

.

.

.

.

.

Balance at December 31,
.
.

2013 .

.

.

.

.

.

.

.

.

196,005

2,326,000

—

4,020,000

—

—

—

—

—

—

—

(618,000)

(3,402,000)

11,227,169

119,997,000

— 2,167,928

22,000

— (138,441,000)

—

—

3,030,303
—

47,796,000
—

—

—

—

—

221,399

2,802,000

2,433,328

26,767,000

—

—

—

3,953,000

—

—
—

—

—

—

—

—

—

—

—

—

(29,912,000)

—
438,556

—
4,000

—
4,690,000

—

—

—

—

—

—

—

—

—

—

—

3,943,000

(2,835,000)

—

—

8,176,000

—

(3,953,000)

—
—

—

—

—

—

—

—

16,912,199

201,315,000

— 2,606,484

26,000

10,021,000

(168,353,000)

—

—

—
—
—

—

—

—

—

—
—
—

—

2,320,000

—

—

—
—
—

—

—

—

—

—
81,204
—

—

—

—

—

—
1,000
—

—

—

—
194,000
5,462,000

—

14,482,000

—

(2,320,000)

(16,912,199)

(203,635,000)

— 12,838,127

129,000

203,502,000

—

—

— 5,941,667

59,000

79,752,000

(62,543,000)

—

—
—
—

—

—

—

—

—
—

—
—

—

—

—

—

—
—

—

—

—

—

—

—

—

$(108,717,000)
(26,294,000)

—
612,000

—

(4,020,000)

(138,419,000)

(29,912,000)

—
4,694,000

3,943,000

(2,835,000)

—

—

8,176,000

(3,953,000)

(158,306,000)

(13,000)

(62,556,000)

500,000

500,000

—
—
—

—

—

—

—

1,000
195,000
5,462,000

14,482,000

(2,320,000)

203,631,000

79,811,000

—
—

—

—

—

—

—
—

—

—

—

—

—

—

—

—

—

1,000
—
—

—

—

—

—

— $

— $

— 21,467,482 $215,000 $311,093,000 $(230,896,000)

$1,000

$487,000

$ 80,900,000

See accompanying notes to consolidated financial statements.

F-7

Onconova Therapeutics, Inc.

Consolidated Statements of Cash Flows

Operating activities:
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment to reconcile net loss to net  cash (used in)  provided by

operating activities:

Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . .
Loss on asset disposal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amortization of deferred financing fees . . . . . . . . . . . . . . . . .
Amortization of debt discount . . . . . . . . . . . . . . . . . . . . . . . .
Change in fair value of warrant liabilities . . . . . . . . . . . . . . . .
Treasury note discount amortization . . . . . . . . . . . . . . . . . . . .
Stock compensation expense . . . . . . . . . . . . . . . . . . . . . . . . .
Changes in assets and liabilities:

Grants receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other current assets . . . . . . . . . . . . . .
Other assets
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other liabilites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,

2013

2012

2011

$(62,556,000) $(29,912,000) $(26,294,000)

446,000
—
—
—
(42,000)
(4,000)
8,015,000

—
(2,662,000)
—
(1,807,000)
1,894,000
(37,000)
(4,631,000)

319,000
3,000
15,000
8,176,000
(367,000)
—
13,844,000

78,000
(1,098,000)
(15,000)
(97,000)
2,573,000
(41,000)
8,155,000

316,000
—
21,000
—
(1,287,000)
—
6,000

1,730,000
253,000
—
2,230,000
1,123,000
58,000
7,673,000

Net cash (used in) provided by operating activities . . . . . . . . . . . . .

(61,384,000)

1,633,000

(14,171,000)

Investing activities:
Payments for purchase  of property and equipment . . . . . . . . . . . . .
Security deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purchases of marketable securities . . . . . . . . . . . . . . . . . . . . . . . .

(609,000)
—
(39,990,000)

Net cash used in  investing activities . . . . . . . . . . . . . . . . . . . . . . .

(40,599,000)

(279,000)
—
—

(279,000)

(256,000)
15,000
—

(241,000)

Financing activities:
Proceeds from initial public offering of common  stock, net  of

issuance costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from the exercise of stock options . . . . . . . . . . . . . . . . . .
Contribution from non-controlling interest . . . . . . . . . . . . . . . . . . .
Reverse stock split cash paid in  lieu  of fractional  shares
. . . . . . . . .
Proceeds from stockholder in connection with settlement of  stock

option exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settlement of stock options . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from the exercise of warrants . . . . . . . . . . . . . . . . . . . . .
Proceeds from the sale of Series H preferred  stock . . . . . . . . . . . . .
Proceeds from the sale of Series J preferred stock . . . . . . . . . . . . .
Repayments of long-term debt . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
Release of cash restricted for debt repayment
. . . . . . . . . . .
Proceeds from stockholder loan and convertible debt

79,811,000
157,000
500,000
(4,000)

—
—
—
—
—
—
—
—

—
165,000
—
—

3,943,000
(2,835,000)
2,167,000
400,000
47,796,000
—
—
25,824,000

—
154,000
—
—

—
—
1,918,000
7,218,000
—
(917,000)
792,000
620,000

Net cash provided by financing activities . . . . . . . . . . . . . . . . . . . .

80,464,000

77,460,000

9,785,000

Effect of foreign currency translation on  cash . . . . . . . . . . . . . . . .

1,000

—

—

Net (decrease) increase  in cash and cash equivalents . . . . . . . . . . . .
Cash and cash equivalents at beginning of  period . . . . . . . . . . . . . .

(21,518,000)
81,527,000

78,814,000
2,713,000

(4,627,000)
7,340,000

Cash and cash equivalents at end of period . . . . . . . . . . . . . . . . . .

$ 60,009,000

$ 81,527,000

$ 2,713,000

Supplemental disclosure of cash flow  information:

Income taxes paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

435,000

—

—

See accompanying notes to consolidated financial statements.

F-8

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements

1. Nature of Business

The Company

Onconova Therapeutics, Inc. (the ‘‘Company’’) was incorporated in the State of Delaware on
December 22, 1998 and commenced operations  on January 1, 1999.  The  Company’s headquarters are
located in Newtown, Pennsylvania. The Company is a clinical-stage biopharmaceutical company  focused
on discovering and developing novel small  molecule drug candidates to treat cancer. Using  its
proprietary chemistry platform, the Company has created an extensive library of targeted  anti-cancer
agents designed to work against specific  cellular  pathways that are important to cancer  cells.  The
Company believes that the drug candidates in its pipeline have the potential  to  be  efficacious in a  wide
variety of cancers without causing harm  to  normal cells. The  Company has three clinical-stage product
candidates and six preclinical programs.  To  accelerate and  broaden the development  of  rigosertib,  the
Company’s most advanced product candidate, the  Company entered into a  collaboration and  license
agreement in 2012 with Baxter Healthcare SA (‘‘Baxter’’), a subsidiary of Baxter International Inc., to
commercialize rigosertib in Europe. In 2011,  the Company  entered into a collaboration and license
agreement with SymBio Pharmaceuticals Limited  (‘‘SymBio’’)  to  commercialize rigosertib in  Japan  and
Korea. The Company has retained development  and  commercialization rights  to  rigosertib  in the rest of
the world, including the United States. During 2012, Onconova Europe GmbH was  established as a
wholly owned subsidiary of the Company for the  purpose of further developing business in Europe. In
April 2013, GBO, LLC, a Delaware limited  liability  company, (‘‘GBO’’) was  formed pursuant to a
collaboration agreement with GVK Biosciences Private Limited,  a  private  limited  company located in
India, (‘‘GVK BIO’’) to collaborate and develop two new clinical programs using  the Company’s
technology platform.

Liquidity

The Company has incurred recurring  operating losses since inception.  For the year ended

December 31, 2013, the Company incurred  a net loss  of $62,556,000 and as of  December 31,  2013, the
Company had generated an accumulated  deficit of $230,896,000.  The  Company anticipates operating
losses to continue for the foreseeable  future due to, among other  things, costs related  to  research
funding, development of its product candidates and its  preclinical programs, strategic  alliances  and the
development of its administrative organization. The Company  will require substantial additional
financing to fund its operations and to continue to execute  its  strategy.

The Company raised significant capital through  the issuance of its redeemable convertible
preferred stock, par value $0.01 per share, in  ten series denominated as Series A through Series J
(‘‘Series  A Preferred Stock’’ through ‘‘Series J Preferred Stock,’’ respectively, and  collectively the
‘‘Preferred Stock’’). See Note 10.

On July 30, 2013, the Company completed its  initial public offering (the ‘‘IPO’’) of 5,941,667
shares of the Company’s common stock,  par value $0.01 per share (‘‘Common Stock’’), at a price of
$15.00 per share, including 775,000 shares of  Common Stock issued  upon the exercise in full by the
underwriters of their option to purchase additional shares at the  same  price to cover over-allotments.
The Company received net proceeds  of  $79,811,000 from the sale, net of  underwriting  discounts and
commissions and other estimated offering  expenses. Immediately prior to the consummation  of  the
IPO, all outstanding shares of Preferred  Stock automatically  converted into shares  of Common Stock  at
the applicable conversion ratio then  in  effect. As a result of the conversion, as of July  30, 2013, the
Company had no shares of Preferred  Stock outstanding.  See Note 10.

F-9

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements are prepared in conformity  with accounting  principles
generally  accepted in the United States (‘‘GAAP’’). The financial statements include the  consolidated
accounts of the Company, its wholly-owned  subsidiary, Onconova Europe  GmbH and  GBO. All
significant intercompany transactions  have been eliminated.

Segment Information

Operating segments are defined as components  of an enterprise about which separate discrete
information is available for evaluation by  the  chief operating decision maker, or  decision-making  group,
in deciding how to allocate resources and in  assessing performance. The  Company views its operations
and  manages its business in one segment, which is the identification and development of oncology
therapeutics.

Use  of Estimates

The preparation of financial statements  in conformity with  GAAP requires management to make

estimates and assumptions that affect the reported  amounts of assets,  liabilities, revenues,  expenses,
other  comprehensive income and related  disclosures. On an ongoing basis,  management evaluates its
estimates, including estimates related to clinical trial accruals, warrant liability, and allocation of
consideration to multiple element collaborative arrangements. The Company bases its estimates on
historical experience and other market-specific or other relevant assumptions  that  it believes to be
reasonable under the circumstances.  Actual results  may  differ  from those estimates  or assumptions.

Prior to  completion of its IPO on July 30, 2013,  the Company utilized estimates and  assumptions

in determining the fair value  of its Common Stock. The  Company granted stock options at  exercise
prices not less than the fair value of its Common Stock as  determined by the board of directors, with
input  from management. Management used the assistance of a third-party valuation firm in  estimating
the fair value of the Common Stock. The board of directors  determined  the estimated fair  value of  the
Common Stock based on a number of objective and  subjective factors, including  external market
conditions affecting the biotechnology  industry sector and  the  historic  prices at which the  Company
sold shares of Preferred Stock.

Concentrations of Credit Risk and Off-Balance Sheet  Risk

Financial instruments that potentially subject the Company  to  concentrations of credit risk  are

primarily  cash, cash equivalents, restricted cash and  marketable securities. The Company maintains  a
portion of its cash and cash equivalent balances in the  form  of  money market accounts with financial
institutions that management believes are creditworthy.  Marketable securities are invested in  U.S.
Treasury obligations. The Company has  no financial instruments with  off-balance  sheet  risk of loss.

Cash and Cash Equivalents

The Company considers all highly liquid investments with  original or  remaining maturity  from the

date of purchase of three months or less to be cash equivalents. Cash  and cash equivalents include
bank demand deposits, marketable securities with maturities of three months  or less at purchase, and

F-10

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

money market funds that invest primarily in  certificates of  deposit, commercial paper and U.S.
government and U.S. government agency  obligations. Cash equivalents are  reported at  fair value.

Marketable Securities

Marketable securities with original maturities longer than three months but which  mature in less
than  one year from the balance sheet date  are  classified  as current assets.  Marketable securities that
mature more than one year from the balance sheet date are classified as noncurrent assets. Marketable
securities that the Company has the intent and  ability to hold  to  maturity  are classified as  investments
held-to-maturity and are reported at amortized cost. The  difference  between  the acquisition cost and
face values of held-to-maturity investments is amortized over the  remaining  term of the investments
and  added to or subtracted from the acquisition cost  and interest income. As of December 31, 2013, all
of the Company’s investments were classified  as held-to-maturity.

Fair Value of Financial Instruments

The carrying amounts reported in the accompanying  consolidated financial statements for cash  and

cash equivalents, marketable securities, accounts payable and accrued liabilities approximate  their
respective fair values because of the short-term nature of these accounts.  The fair value of the warrant
liability  is discussed in Note 4, ‘‘Fair Value Measurements.’’

Property and Equipment

Property and equipment are stated at cost, less accumulated  depreciation. Property and equipment

are depreciated using the straight-line method over  the  estimated useful  lives of the assets. Leasehold
improvements are amortized over the useful  life  of  the  asset  or the lease  term, whichever  is shorter.
Maintenance and repairs are expensed  as incurred. The following estimated useful  lives were  used to
depreciate the Company’s assets:

Lab equipment . . . . . . . . . . . . . .
Software . . . . . . . . . . . . . . . . . .
Computer and office equipment
.
Leasehold improvements . . . . . . .

5 - 6 years
3 years
5 - 6 years
Shorter of the lease term or estimated useful life

Estimated Useful Life

Upon retirement or sale, the cost of the disposed  asset and the related accumulated depreciation

are removed from the accounts and any resulting gain or loss is recognized.

The Company reviews long-lived assets for  impairment when  events or changes  in circumstances

indicate that the carrying value of the assets may not  be  recoverable. Recoverability  is measured by
comparison of the assets’ book value  to  future  net undiscounted cash flows that the assets are expected
to generate. If such assets are considered  to  be  impaired, the impairment to be recognized is  measured
by the amount by which the book value of the assets  exceeds their fair  value, which is measured based
on the projected discounted future net  cash flows  generated from the assets. No impairment losses
have been recorded through December 31, 2013.

F-11

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

Restricted Cash

Under the Company’s office lease, the Company is required to provide the  landlord a  $125,000

letter of credit, which is recorded as  restricted cash  on the consolidated balance sheets as of
December 31, 2013 and 2012.

Foreign Currency Translation

The reporting currency of the Company and its U.S. subsidiaries is  the U.S.  dollar. The functional
currency of the Company’s non-U.S. subsidiary is the local currency. Assets and liabilities of the  foreign
subsidiary are translated into U.S. dollars based  on exchange  rates at the end of the period. Revenues
and  expenses are translated at average exchange rates during the reporting  period. Gains and  losses
arising from the translation of assets and  liabilities are included as a component of accumulated other
comprehensive income. Gains and losses resulting from foreign currency transactions  are reflected
within the Company’s results of operations.  The Company  has not utilized  any foreign  currency  hedging
strategies to mitigate the effect of its foreign  currency exposure.

Revenue Recognition

Currently, the Company’s revenue is generated primarily through collaborative research and license

agreements. The terms of these agreements contain  multiple deliverables which may include
(i) licenses, (ii) research and development  activities, (iii) participation  in joint steering committees and
(iv) product supply. The terms of these agreements may  include nonrefundable upfront license fees,
payments for research and development activities, payments based upon  the achievement of  certain
milestones, royalty payments based on product sales derived from the collaboration, and  payments for
supplying product. In all instances, revenue is recognized only when the price is fixed or determinable,
persuasive evidence of an arrangement  exists,  delivery has occurred or the  services have been  rendered,
collectability of the resulting receivable is reasonably assured, and the Company  has fulfilled  its
performance obligations under the contract.

For arrangements with multiple elements, the Company recognizes revenue in accordance with the
Financial Accounting Standards Board (‘‘FASB’’) Accounting Standards Update (‘‘ASU’’) No.  2009-13,
Multiple-Deliverable Revenue Arrangements (‘‘ASU 2009-13’’), which provides guidance for separating and
allocating consideration in a multiple element  arrangement. The selling prices  of  deliverables under  an
arrangement may be derived using third-party evidence  (‘‘TPE’’), or a best  estimate of selling price
(‘‘BESP’’), if vendor-specific objective  evidence of  selling price  (‘‘VSOE’’) is  not  available.  The
objective of BESP is to determine the  price at which  the Company  would transact a sale if  the element
within the license agreement was sold  on a  standalone  basis. Establishing BESP  involves  management’s
judgment and considers multiple factors,  including market conditions and company-specific factors,
including those factors contemplated  in negotiating the agreements, as  well as  internally  developed
models  that include assumptions related  to market opportunity, discounted cash flows,  estimated
development costs, probability of success and the time needed to commercialize  a product  candidate
pursuant to the license. In validating  the BESP, management considers whether changes  in key
assumptions used to determine the BESP will have a  significant effect  on the  allocation  of the
arrangement consideration between the multiple deliverables. The Company may  use third-party
valuation specialists to assist it in determining BESP. Deliverables under the arrangement  are separate
units of accounting if (i) the delivered  item has  value to the  customer  on a standalone basis  and (ii) if

F-12

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

the arrangement includes a general right of return relative to the delivered  item, delivery or
performance of the undelivered item  is considered probable and substantially within the Company’s
control. The arrangement consideration that is fixed or determinable  at the inception  of the
arrangement is allocated to the separate units of accounting  based on  their  relative selling prices. The
appropriate revenue recognition model  is applied to each element  and  revenue is  accordingly
recognized as each element is delivered. Management  exercises significant judgment  in determining
whether a deliverable is a separate unit of accounting.

In determining the separate units of accounting,  the Company evaluates whether  the license  has

standalone value to the collaborator based on consideration  of  the relevant facts  and circumstances  for
each arrangement. Factors considered in this  determination include  the  research  and development
capabilities of the collaborator and the  availability of relevant  research  expertise in  the marketplace. In
addition, the Company considers whether or not (i) the collaborator  could  use the  license for its
intended purpose without the receipt  of  the  remaining  deliverables, (ii) the value of the license was
dependent on the undelivered items  and (iii) the collaborator or other vendors could provide the
undelivered items.

Under a  collaborative research and license agreement, a steering  committee is  typically responsible

for overseeing the general working relationships,  determining the protocols to be followed in the
research and development performed and evaluating  the results  from  the continued development of the
product. The Company evaluates whether  its  participation in joint steering  committees  is a substantive
obligation or whether the services are considered  inconsequential  or perfunctory. The  factors the
Company considers in determining if its participation in  a  joint steering committee  is a substantive
obligation include: (i) which party negotiated or requested the steering committee,  (ii) how  frequently
the steering committee meets, (iii) whether or not there  are any penalties  or other recourse if the
Company does not attend the steering committee meetings, (iv) which  party has decision making
authority on the steering committee and  (v)  whether or not  the collaborator has the requisite
experience and expertise associated with the research and development of  the licensed intellectual
property.

Whenever the Company determines that  an  element is delivered over  a  period of  time, revenue is

recognized using either a proportional performance model,  if a pattern  of  performance can be
determined or a straight-line model over the  period  of performance,  which is typically the research and
development term. Progress achieved under the Company’s various clinical research organization
contracts are typically used as the measure of performance when  applying the proportional
performance method. At the  end of each reporting period, the Company reassesses its  cumulative
measure of performance and makes appropriate adjustments, if  necessary.  The  Company recognizes
revenue using the proportional performance  model whenever the Company  is able to make reasonably
reliable estimates of the level of effort  required to complete its performance obligations under an
arrangement. Revenue recognized under the proportional  performance  model  at each reporting  period
is determined by multiplying the total expected payments under the contract (excluding royalties  and
payments contingent upon achievement of milestones) by  the  ratio of  the  level of effort  incurred to
date to the estimated total level of effort required to complete the performance obligations under  the
arrangement. Revenue is limited to the lesser of the cumulative amount  of payments  received or  the
cumulative amount of revenue earned, as determined  using the  proportional performance  model  as of
each reporting period. Alternatively, if the  Company is not able to make reasonably reliable estimates
of the level of effort required to complete its performance  obligations under  an arrangement, then

F-13

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

revenue under the arrangement is recognized on a straight-line basis over the period expected  to  be
required to complete the Company’s performance  obligations.

Incentive milestone payments may be triggered either by  the results  of the Company’s research

efforts or by events external to it, such as regulatory approval to market a product or attaining
agreed-upon sales levels. Consideration  that is  contingent upon  achievement of a  milestone is
recognized in its entirety as revenue in  the period in which  the milestone is  achieved, but only if  the
consideration earned from the achievement of a milestone  meets all  the criteria for  the milestone to be
considered substantive at the inception of the arrangement.  For a milestone to be considered
substantive, the consideration earned  by achieving  the milestone must (i) be commensurate with either
the Company’s performance to achieve the milestone  or the  enhancement of the value of the item
delivered as a result of a specific outcome  resulting  from the Company’s  performance to achieve the
milestone, (ii) relate solely to past performance and  (iii) be reasonable relative to all deliverables and
payment terms in the collaboration agreement.

For events for which the occurrences are contingent solely upon  the passage of time or are  the
result of performance by a third party, the contingent payments will be recognized as  revenue when
payments are earned, the amounts are fixed and  determinable and collectability is  reasonably  assured.

Royalties are recorded as earned in accordance with  the contract terms when third party sales can

be reliably measured and collectability  is reasonably assured.

The Company recognized revenue of $4,176,000 and $45,490,000 during  the years ended

December 31, 2013 and 2012, respectively, as a result of its license  and collaboration agreement with
Baxter. The Company recognized revenue  of  $577,000, $503,000 and $227,000  during  the years ended
December 31, 2013, 2012 and 2011, respectively, as a result of  its license and collaboration agreement
with SymBio. The remaining revenue recognized  during the years ended December 31,  2012 and  2011
of $197,000 and $1,260,000, respectively, pertained  to  research and development  services provided  by
the Company under certain research  grants.  The Baxter and SymBio agreements are the  only
agreements that are being accounted for  under ASU 2009-13. See Note 15,  ‘‘License and Collaboration
Agreements,’’ for a further discussion  of  the  agreements with Baxter and SymBio.

Research and Development Expenses

Research and development costs are charged  to  expense  as incurred.  These  costs include,  but are

not limited to, license fees related to the acquisition of in-licensed  products;  employee-related expenses,
including salaries, benefits and travel; expenses incurred under  agreements with  contract research
organizations and investigative sites that  conduct clinical trials and preclinical studies; the cost of
acquiring, developing and manufacturing clinical trial  materials;  facilities, depreciation and  other
expenses, which include direct and allocated expenses  for rent and maintenance of facilities, insurance
and  other supplies; and costs associated with preclinical  activities and regulatory operations.

Costs for certain development activities,  such as  clinical trials, are  recognized  based on  an

evaluation of the progress to completion  of  specific tasks using data such  as patient enrollment, clinical
site activations, or information provided to the  Company by its vendors with respect  to  their actual
costs incurred. Payments for these activities are based on  the terms of the  individual arrangements,
which may differ from the pattern of  costs  incurred,  and are reflected  in the consolidated financial
statements as prepaid or accrued research and development expense,  as the case may  be.

F-14

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

Comprehensive Loss

Comprehensive loss is defined as the change in equity  of  a  business enterprise  during  a period

from transactions and other events and  circumstances from non-owner sources.

Income Taxes

The Company accounts for income taxes under the asset  and liability method. Deferred tax  assets

and  liabilities are recognized for the future tax consequences attributable to differences between the
financial statement carrying amounts of existing assets and liabilities and their respective tax bases using
enacted tax rates in effect for the year in  which the differences are expected  to  affect taxable income.
The deferred tax asset primarily includes net operating  loss and tax credit  carry forwards,  accrued
expenses  not currently deductible and  the cumulative temporary differences related to certain research
and  patent costs, which have been charged to expense in the accompanying  statements of operations
but have been recorded as assets for income tax purposes. The portion  of any  deferred tax asset for
which it is more likely than not that a tax benefit will not be realized  must then be offset  by  recording
a valuation allowance. A full valuation allowance has been established against all of the  deferred tax
assets (see Note 8, ‘‘Income Taxes’’), as it  is more  likely than not that  these assets will  not  be  realized
given the Company’s history of operating  losses.  The Company  recognizes the  tax benefit  from an
uncertain tax position only if it is more likely  than not to be sustained upon examination based on the
technical merits of the position. The amount  for which  an exposure exists  is measured  as the largest
amount of benefit determined on a cumulative probability basis  that the Company believes is more
likely than not to be realized upon ultimate settlement of the position.

Preferred Stock

The Company accounted for the redemption premium and issuance costs on its Preferred Stock

using  the effective interest method, accreting such amounts  to  its  Preferred Stock  from the date  of
issuance to the earliest date of redemption.  Immediately prior to the  consummation of the IPO, all
outstanding shares of Preferred Stock automatically converted into shares of Common  Stock at  the
applicable conversion ratio then in effect. As  a  result  of  the conversion, as  of  July 30, 2013, the
Company had no shares of Preferred Stock outstanding. See Note 10.

Stock Warrants

Freestanding warrants that are related to the purchase of Stock are classified as liabilities and
recorded at fair value. The warrants  are subject to re-measurement at each balance sheet date and any
change  in fair value is recognized as a component  of  change in fair value of warrant liability in the
consolidated statements of operations. See Note  10. The warrants are classified  as Level 3 liabilities
(see Note 4 for a discussion of the fair value hierarchy).

Stock-Based Compensation Expense

The Company applies the provisions of  FASB  Accounting Standards  Codification (‘‘ASC’’)
Topic 718, Compensation—Stock Compensation (‘‘ASC  718’’), which requires  the measurement and
recognition of compensation expense for  all stock-based  awards made to employees and  non-employees,
including employee stock options.

F-15

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

At certain times throughout the Company’s history, the chairman  of the Company’s  board of

directors, who is also a significant stockholder of the Company  (the ‘‘Significant Holder’’), afforded
option holders the opportunity for liquidity  in transactions in  which options were exercised and the
shares of Common Stock issued in connection  therewith were simultaneously  purchased by the
Significant Holder (each, a ‘‘Purchase  Transaction’’). (See Note 11) Because the Company had
established a pattern of providing cash settlement  alternatives for option holders, the Company
accounted for its stock-based compensation awards as liability awards.  The  Company measured liability
awards based on the award’s intrinsic value on the  grant date and  then re-measured  them at each
reporting date until the date of settlement. Compensation  expense was recognized on  a straight-line
basis over the requisite service period  for each separately vesting portion of the  award.  Compensation
expense for each period until settlement  was  based on the  change in  intrinsic  value (or a  portion of the
change  in intrinsic value, depending on the percentage of  the requisite  service that has been  rendered
at the  reporting date). Changes in the intrinsic  value of a liability that occur after  the end of the
requisite service period were considered compensation  expense in the period in which the changes
occur. On April 23, 2013, the Company distributed a notification letter to all equity  award  holders
under the 2007 Plan advising them that Purchase Transactions would  no  longer occur, unless, at the
time of  a Purchase Transaction, the option holder has held the Common Stock  issued upon  exercise  of
options for a period of greater than six months prior to selling  such Common Stock to the Significant
Holder and that any such sale to the  Significant Holder  would be at the fair value of the  Common
Stock on the date of such sale. Based on  these new criteria  for Purchase Transactions,  the Company
remeasured options outstanding under the 2007  Plan  as of April 23, 2013 to their  intrinsic  value and
reclassified such options from liabilities  to  stockholders’  deficit  within the Company’s consolidated
balance sheets, which amounted to $14,482,000.  The remaining  expense for these options is being
recognized on a straight-line basis over the  remaining  requisite service  period.

Share-based payment transactions with employees, including grants of  employee stock options, are

recognized as compensation expense  over the  requisite service period  based on their estimated fair
values. ASC 718 also requires significant judgment and the use  of estimates, particularly surrounding
Black-Scholes assumptions such as stock  price volatility over  the option  term and  expected option lives,
as well as expected option forfeiture rates,  to  estimate the  grant date fair  value of equity-based
compensation and requires the recognition  of  the  fair value of stock compensation in the statement of
operations.

Clinical Trial Expense Accruals

As part of the process of preparing its financial statements, the Company is required  to  estimate
its expenses resulting from its obligations under contracts with vendors, clinical research organizations
and  consultants and under clinical site agreements  in connection  with conducting clinical trials. The
financial terms of these contracts are  subject to negotiations, which  vary  from contract  to  contract and
may result in payment flows that do not match the periods over which materials or services are
provided under such contracts. The Company’s objective is  to  reflect the appropriate trial expenses in
its financial statements by matching those  expenses with the period  in which services are performed and
efforts are expended. The Company accounts for  these expenses according  to  the progress of the trial
as measured by patient progression and  the  timing of various aspects of the  trial.  The Company
determines accrual estimates through financial  models taking into account discussion with applicable
personnel and outside service providers as to the  progress or state  of consummation of trials, or  the

F-16

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

services completed. During the course of a clinical trial, the Company  adjusts its  clinical expense
recognition if actual results differ from its estimates. The Company  makes estimates  of its  accrued
expenses  as of each balance sheet date  based on the facts and  circumstances  known  to  it at that time.
The Company’s clinical trial accruals are dependent  upon the  timely  and  accurate reporting  of  contract
research organizations and other third-party vendors.  Although the  Company does not expect  its
estimates to be materially different from  amounts actually incurred, its understanding of the status and
timing of services performed relative to the actual status and timing of services  performed  may vary
and  may result in it reporting amounts that  are  too high or too low for  any particular  period. For the
years ended December 31, 2013, 2012 and 2011, there were  no material adjustments to the  Company’s
prior period estimates of accrued expenses  for clinical  trials.

Collaboration Arrangements

A collaboration arrangement is defined as a contractual arrangement  that  has or may  have
significant financial milestones associated with success-based development, which include certain
arrangements the Company has entered into regarding the  research  and development, manufacture
and/or commercialization of products and  product candidates. These collaborations generally provide
for non-refundable, upfront license fees,  research and development and commercial performance
milestone payments, cost sharing and  royalty payments. The collaboration  agreements with third-parties
are performed on a ‘‘best efforts’’ basis with no  guarantee  of either technological or  commercial
success. The Company evaluates whether an arrangement is  a collaboration  arrangement at its
inception based on the facts and circumstances specific to the arrangement.  The  Company reevaluates
whether an arrangement qualifies or  continues to qualify as a collaboration arrangement whenever
there is a change in the anticipated or actual ultimate commercial success  of  the endeavor. See
Note 15, ‘‘License and Collaboration Agreements,’’ for a discussion  of the Company’s  current
collaborations with Baxter and SymBio.

Basic and Diluted Net Loss Per Share of  Common Stock

Basic net loss per share of common stock is computed  by dividing  net loss  applicable to common

stockholders by the weighted-average  number of shares of Common  Stock outstanding  during  the
period, excluding the dilutive effects of Preferred  Stock,  warrants to purchase  Preferred  Stock and stock
options. Diluted net loss per share of  common stock  is computed by dividing the net  loss applicable to
common stockholders by the sum of the weighted-average number of shares  of Common Stock
outstanding during the period plus the potential dilutive effects of  Preferred Stock and  warrants to
purchase Preferred Stock, and stock  options outstanding during  the period  calculated in  accordance
with the treasury stock method, but are  excluded if their effect is  anti-dilutive. Because  the impact of
these items is anti-dilutive during periods of net loss,  there was no difference between basic and diluted
net loss per share of Common Stock  for the years ended December 31,  2013, 2012  and 2011.

Recent Accounting Pronouncements

In February 2013, the Financial Accounting  Standards  Board (the ‘‘FASB’’) amended its guidance

to require an entity to present the effect of certain significant reclassifications  out of accumulated other
comprehensive income on the respective line  items in net income.  The new  accounting guidance does
not change the items that must be reported  in other comprehensive  income  or when an  item of  other
comprehensive income must be reclassified to net income.  The guidance is effective prospectively for

F-17

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

fiscal years beginning after December 15, 2012.  The Company  adopted these new  provisions for the
quarter beginning January 1, 2013. As the guidance requires additional presentation only, there was no
impact  to the Company’s consolidated financial position, results  of operations or cash flows.

In July 2013, the FASB issued guidance clarifying that  an  unrecognized tax benefit,  or a portion of

an unrecognized tax benefit, should be presented  in the financial statements as  a reduction to a
deferred tax asset for a net operating loss  carryforward, a  similar tax loss, or a  tax credit carryforward if
such  settlement is required or expected  in the event the  uncertain tax benefit is  disallowed. In
situations where a  net operating loss carryforward, a similar tax  loss, or a tax credit  carryforward is  not
available at the reporting date under the tax  law  of the applicable  jurisdiction  or the tax law of the
jurisdiction does not require, and the entity does not intend  to  use, the deferred tax  asset for  such
purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and
should not be netted with the deferred tax asset. The guidance is effective for  fiscal  years,  and interim
periods within those years, beginning  after December 15, 2013. Early adoption is permitted. The
guidance is to be applied prospectively  to  all unrecognized tax  benefits that exist  at the effective  date.
Retrospective application is permitted.  The Company is  currently evaluating the impact that adoption
will have on the determination or reporting of its financial results.

3. Property and Equipment

Property and equipment and related accumulated depreciation  are as follows:

December 31,

Laboratory equipment . . . . . . . . . . . . . . . . . . . . . . . . . .
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Computer and office equipment . . . . . . . . . . . . . . . . . . .
Leasehold improvements . . . . . . . . . . . . . . . . . . . . . . . .

$

866,000
92,000
433,000
1,011,000

$

2013

2012

764,000
91,000
323,000
633,000

Less accumulated depreciation . . . . . . . . . . . . . . . . . . . .

2,402,000
(1,776,000)

1,811,000
(1,348,000)

Property and equipment, net . . . . . . . . . . . . . . . . . . . . .

$

626,000

$

463,000

Depreciation and amortization expense was $449,000,  $319,000  and $316,000 for the years ended

December 31, 2013, 2012 and 2011, respectively.

4. Fair Value Measurements

The Company applies various valuation approaches in  determining the fair value  of  its  financial

assets and liabilities within a hierarchy that maximizes  the use  of  observable  inputs  and minimizes the
use of unobservable inputs by requiring  that  observable  inputs  be  used  when available. Observable
inputs are inputs that market participants  would use in pricing the asset or liability based  on market
data obtained from sources independent  of the Company. Unobservable  inputs  are inputs that reflect
the Company’s assumptions about the  inputs that market participants would use in pricing the  asset or

F-18

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

4. Fair Value Measurements (Continued)

liability  and are developed based on  the  best information available  under the circumstances.  The fair
value hierarchy is broken down into  three levels  based on the source of inputs as  follows:

Level 1—Valuations based on unadjusted quoted prices  in  active markets for  identical  assets or
liabilities that the Company has the ability to access.

Level 2—Valuations based on quoted  prices for similar  assets or liabilities in active markets,
quoted prices for identical or similar assets or liabilities in markets  that are not active and  models
for which all significant inputs are observable, either  directly or indirectly.

Level 3—Valuations based on inputs that are unobservable and significant to the overall fair value
measurement.

The availability of observable inputs can vary among the various  types  of financial assets and
liabilities. To the extent that the valuation  is based on  models or inputs that are  less  observable or
unobservable in the market, the determination  of  fair value  requires more judgment. In certain cases,
the inputs used to measure fair value may  fall into different levels of the fair value  hierarchy. In such
cases, for financial statement disclosure purposes, the level in the fair  value  hierarchy  within which  the
fair value measurement is classified is  based on the lowest level  input that is significant to the overall
fair value measurement.

The Company had no assets or liabilities classified as  Level 1 or Level 2.  The Series G Preferred

Stock warrants (see Note 10) are classified as Level 3.  The fair values of  these instruments are
determined using models based on market observable inputs and  management judgment. There were
no material re-measurements of fair value during the years ended December 31, 2013  and 2012 with
respect to financial assets and liabilities,  other than those assets and liabilities that are  measured at fair
value on a recurring basis.

The Company has classified the Series G  Preferred Stock warrants as  a  liability  and has
re-measured the liability to estimated fair value at December 31,  2013 and 2012, using the  Black-
Scholes option pricing model using the following assumptions: contractual life according  to  the
remaining terms of the warrants, no dividend yield, weighted average risk-free  interest  rate of 0.34%
and  0.31% at December 31, 2013 and 2012,  respectively,  and weighted average volatility of 74.40% and
64.87% at December 31, 2013 and 2012,  respectively

The following fair value hierarchy table presents information about the Company’s financial assets

and  liabilities measured at fair value on a recurring basis as  of December 31, 2013  and 2012.

Fair Value Measurement as of
December 31, 2013

Fair Value Measurement as of
December 31, 2012

Level 1 Level 2 Level 3

Balance Level 1 Level  2 Level 3

Balance

Warrant liability . . . . . . . . . . . . . . . . . .

$— $— $20,000 $20,000

$— $— $62,000 $62,000

Total . . . . . . . . . . . . . . . . . . . . . . . . . .

$— $— $20,000 $20,000

$— $— $62,000 $62,000

F-19

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

4. Fair Value Measurements (Continued)

The following table presents a reconciliation of the Company’s liabilities measured at  fair value on
a recurring basis using significant unobservable inputs (Level 3)  for the  years ended December  31, 2013
and  2012:

Warrant
Liability

Balance at December 31, 2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settlements of warrant liability awards . . . . . . . . . . . . . . . . . . . . . . . . .
Expiration of warrant liability awards . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in fair value upon re-measurement . . . . . . . . . . . . . . . . . . . . . .

$1,064,000
(635,000)
(975,000)
608,000

Balance at December 31, 2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

62,000

Change in fair value upon re-measurement . . . . . . . . . . . . . . . . . . . . . .

(42,000)

Balance at December 31, 2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

20,000

The fair values of cash equivalents, marketable securities,  accounts  payable and  accrued liabilities

approximate their  respective carrying  values due to the  short-term nature of these accounts.

There were no transfers between Level 1 and Level 2 in  any of the periods reported.

5. Net Loss Per Share of Common Stock

The following table sets forth the computation of basic and diluted  earnings  per  share for the

years ended December 31, 2013, 2012 and 2011:

Basic and diluted net loss per share of

common stock:

Net loss . . . . . . . . . . . . . . . . . . . . . . . .
Accretion to redemption value of

Year ended December 31,

2013

2012

2011

$(62,543,000) $(29,912,000) $(26,294,000)

preferred stock . . . . . . . . . . . . . . . . .

(2,320,000)

(3,953,000)

(4,020,000)

Net  loss applicable to common

stockholders . . . . . . . . . . . . . . . . . . .

$(64,863,000) $(33,865,000) $(30,314,000)

Weighted average shares of common

stock outstanding . . . . . . . . . . . . . . .

10,594,227

2,206,888

2,137,403

Net loss per share of common stock—

basic and diluted . . . . . . . . . . . . . . . .

$

(6.12) $

(15.35) $

(14.18)

F-20

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

5. Net Loss Per Share of Common Stock (Continued)

The following potentially dilutive securities outstanding at  December  31, 2013, 2012 and  2011 have
been excluded from the computation of diluted  weighted  average shares  outstanding, as they would be
antidilutive:

December 31,

2013

2012

2011

Preferred Stock . . . . . . . . . . . . . . . . . . . . . . .
Warrants . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stock options . . . . . . . . . . . . . . . . . . . . . . . . .

— 12,838,127
4,597
2,564,147

4,597
4,344,365

8,575,918
426,539
2,026,396

4,348,962

15,406,871

11,028,853

6. Balance Sheet Detail

Prepaid expenses and other current assets  are as  follows:

Research and development . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$2,242,000
1,051,000
645,000
449,000

$1,429,000
—
101,000
195,000

December 31,

2013

2012

Accrued expenses and other current  liabilities  are as  follows:

$4,387,000

$1,725,000

December 31,

2013

2012

Research and development . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation . . . . . . . . . . . . . . . . . . . . . . . . . .
Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$4,625,000
509,000
302,000
384,000

$3,521,000
247,000
—
157,000

$5,820,000

$3,925,000

7. Debt

In December 2011, the chairman of the Company’s board of directors,  who is  also a significant

stockholder of the Company, advanced  $620,000 to the  Company to fund operations. Interest accrued
at 10% per annum. The stockholder loan  was  exchanged for convertible  promissory  notes in  April 2012
(see Note 9).

8. Income Taxes

The Company accounts for income taxes under  FASB  ASC 740 (‘‘ASC  740’’).  Deferred income tax

assets and liabilities are determined based upon differences  between  financial  reporting and  tax bases

F-21

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

8. Income Taxes (Continued)

of assets and liabilities, which are measured  using the  enacted  tax  rates and laws that will be in effect
when the differences are expected to reverse.

Income taxes have been based on the  following income  (loss) before income tax  expense:

Year Ended December 31,

2013

2012

2011

Domestic . . . . . . . . . . . . . . . . . . . . .
Foreign . . . . . . . . . . . . . . . . . . . . . .

$(62,154,000) $(29,912,000) $(26,294,000)
—

33,000

—

Total . . . . . . . . . . . . . . . . . . . . . . . . . .

$(62,121,000) $(29,912,000) $(26,294,000)

The provision for income taxes consists  of  the following:

Year Ended December 31,

2013

2012

2011

Current

US  Federal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State and Local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$140,000
$— $—
285,000 — —
10,000 — —

Total Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$435,000

$— $—

Deferred

US  Federal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State and Local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

— $— $—
— — —
— — —

Total Deferred . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

— $— $—

Total Expense (Benefit) . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$435,000

$— $—

As of December 31, 2013, the Company had federal net  operating loss (‘‘NOL’’) carry forwards of

$119,165,000, state NOL carry forwards  of $99,165,000 and research and development tax credit  carry
forwards of $35,085,000, which are available to reduce future  taxable income.  The federal  NOL and  tax
credit carry forwards will begin to expire at various dates starting in 2022.  The  state NOL  carry
forwards will begin to expire at various dates starting  in 2016. The  NOL carry forwards are subject to
review and possible adjustment by the Internal Revenue Service and  state tax  authorities. NOL and tax
credit carry forwards may become subject to an annual limitation  in the event  of  certain cumulative
changes in the ownership interest of  significant  shareholders over a three-year period in  excess  of 50%,
as defined under Sections 382 and 383  of  the Internal Revenue Code  of 1986, as amended,  as well as
similar state tax provisions. This could  limit the amount of NOLs that the  Company can  utilize annually
to offset future taxable income or tax liabilities.  The  amount  of  the annual limitation,  if any, will be
determined based on the value of the Company immediately prior to the ownership change. Subsequent
ownership changes may further affect  the  limitation  in future years.

The Company’s reserves related to taxes are  based on a determination of whether and how much

of a tax benefit taken by the Company in its tax filings or positions is more  likely than not to be
realized. The Company recognized no  material adjustment  for  unrecognized income tax benefits.

F-22

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

8. Income Taxes (Continued)

Through December 31, 2013, the Company had no unrecognized  tax  benefits or related interest and
penalties accrued.

The principal components of the Company’s deferred tax assets are  as follows:

Year Ended December 31,

2013

2012

Deferred tax assets:

Net operating loss carryovers . . . . . . . . . . . . . . . . .
R&D tax credits . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-qualified stock options . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . .
Charitable contributions . . . . . . . . . . . . . . . . . . . .
Accrued expenses . . . . . . . . . . . . . . . . . . . . . . . . .
Fixed assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 47,364,000
35,223,000
3.988,000
5,938,000
6,000
586,000
199,000

$ 35,921,000
13,868,000
1,057,000
4,246,000
6,000
40,000
159,000

Deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . .
Less valuation allowance . . . . . . . . . . . . . . . . . . . . . .

93,304,000
(93,304,000)

55,297,000
(55,297,000)

Net deferred tax assets . . . . . . . . . . . . . . . . . . . . . . .

$

— $

—

ASC 740 requires  a valuation allowance  to  reduce the deferred tax assets  reported if, based on the

weight of available evidence, it is more  likely than  not  that some  portion or  all  of  the deferred  tax
assets will not be realized. After consideration of  all  the evidence,  both  positive and negative, the
Company has recorded a full valuation  allowance  against its  deferred tax assets  at December 31, 2013
and 2012, respectively, because the Company’s management has  determined that is it more likely than
not that these assets will not be fully  realized. The Company experienced a net change in valuation
allowance of $38,007,000 and $8,718,000  for the years ended  December 31, 2013 and 2012, respectively.

A reconciliation of income tax (expense)  benefit at  the statutory federal income tax  rate and

income taxes as reflected in the financial statements is as  follows:

Federal income tax expense at statutory rate . . . . . . . . . . . . .
Permanent items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State income tax, net of federal benefit . . . . . . . . . . . . . . . . .
Tax  credits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision to return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in valuation allowance . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended
December 31,

2013

2012

2011

34.0% 34.0% 34.0%
(25.1)
(8.3)
1.8
4.5
18.5
34.4
0.0
(3.8)
(29.1)
(61.2)
(0.1)
(0.2)

(5.6)
6.2
22.1
(5.1)
(51.6)
0.0

Effective income tax rate . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(0.6)% 0.0% 0.0%

F-23

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

9. Convertible Promissory Notes

In March 2012, the Company offered to its stockholders the opportunity to participate  in a

$30,000,000 private placement of convertible promissory notes (the  ‘‘Convertible Debt Offering’’). From
April through July 2012, the Company had aggregate  closings of the  Convertible Debt Offering of
$26,444,000, including $620,000 from the principal that remained outstanding on a stockholder loan at
December 31, 2011.

The convertible promissory notes issued in the Convertible Debt Offering carried a 10% interest

rate calculated on the basis of a 360-day  year and  were scheduled to mature  on June 29,  2013. The
convertible promissory notes provided the holder the  right  to  convert  any  portion of the outstanding
principal and interest in exchange for  equity instruments upon the completion of an  initial public
offering that generated aggregate proceeds  in excess of $25,000,000 (the  ‘‘IPO Scenario’’) or  upon the
completion of an equity offering that generated  aggregate  proceeds  in excess of $15,000,000  (the
‘‘Equity Scenario’’). In the event of a  conversion under  the IPO Scenario, the holder would have
received shares of Common Stock equal  to  the offering price that was initially offered to the public. In
the event of a conversion under the Equity Scenario, the  holder  would have received equity  instruments
equivalent to those issued in  the Equity Scenario at a conversion price equal to the lower  of $11.00 per
share or the original issuance price of  the underlying equity instrument.  If the Company  merged  with
another company while the convertible promissory notes were still outstanding, immediately after  which
the Company’s stockholders owned less than 50%  of the voting stock of the surviving company,  then
each convertible promissory note would have  been  required to be redeemed for an amount equal  to
two times the outstanding principal amount together  with any unpaid and accrued  interest.

In July 2012, the Company amended and  restated its certificate  of incorporation  and designated
Series I Preferred Stock. The Company  and the holders of  the convertible  promissory notes amended
the Equity Scenario provision of the notes  to  permit  the holders to convert  the convertible promissory
notes into shares of Series I Preferred  Stock  at  a  conversion  price of $11.00  per  share.

In connection with the amendment of the convertible promissory notes, the notes  were also

analyzed to determine the existence of a beneficial  conversion  feature. The Company concluded that an
$8,176,000 contingent beneficial conversion feature  existed related to the  Equity Scenario as of July
2012. The fair value of the Series I Preferred Stock used to calculate  the value  of the beneficial
conversion feature was determined by management with the assistance of a third-party  valuation firm.

On July 27, 2012, the holders of the convertible promissory  notes exercised their right to convert

the outstanding principal and interest into Series  I Preferred Stock. Upon conversion, the holders
received 2,443,328 shares of Series I  Preferred Stock, and the Company  recorded  interest  expense of
$8,176,000, which was equal to the amount of the unamortized contingent beneficial conversion feature.

F-24

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

10. Preferred Stock and Stockholders’ Equity (Deficit)

Capitalization

The following is the composition of share capital  as of December 31, 2013 and  2012:

Shares of $0.01 par value per share:
Common stock . . . . . . . . . . . . . . . . . . . . . . . . .

Shares of $0.01 par value per share:
Preferred Stock . . . . . . . . . . . . . . . . . . . . . . . . .

Redeemable Preferred Stock:
Series A Preferred Stock . . . . . . . . . . . . . . . . . .
Series B Preferred Stock . . . . . . . . . . . . . . . . . .
Series C Preferred Stock . . . . . . . . . . . . . . . . . .
Series D Preferred Stock . . . . . . . . . . . . . . . . . .
Series E Preferred Stock . . . . . . . . . . . . . . . . . .
Series F Preferred Stock . . . . . . . . . . . . . . . . . .
Series G Preferred Stock . . . . . . . . . . . . . . . . . .
Series H Preferred Stock . . . . . . . . . . . . . . . . . .
Series I Preferred Stock . . . . . . . . . . . . . . . . . . .
Series J Preferred Stock . . . . . . . . . . . . . . . . . . .

Total Redeemable Preferred Stock . . . . . . . . . . .

Authorized

Issued and Outstanding

December 31,
2013

December 31,
2012

December 31,
2013

December 31,
2012

75,000,000

30,145,155

21,467,482

2,606,484

5,000,000

—

—

—

—
400,000
— 1,200,000
— 1,200,000
— 1,625,000
— 1,650,000
— 2,000,000
— 2,700,000
— 2,042,950
— 2,700,000
— 3,030,303

— 18,548,253

—
107,000
— 1,107,189
— 1,069,946
— 1,583,568
— 1,633,082
— 2,000,000
— 1,934,359
— 2,013,424
— 2,433,328
— 3,030,303

— 16,912,199

In preparation for the IPO, the Company’s board of directors  and  stockholders approved a
one-for-1.333 reverse stock split of the Company’s Common Stock.  The reverse  stock  split became
effective on July 17, 2013. All Common  Stock share  and  per share amounts in  the condensed
consolidated financial statements and notes thereto have  been retroactively adjusted for  all  periods
presented to give effect to this reverse  stock split, including reclassifying an amount equal to the
reduction in par value of common stock to additional paid-in capital. The  reverse stock  split did not
result in a retroactive adjustment of share amounts for the  Preferred  Stock.

In July 2012, the Company issued 2,433,328 shares  of  Series I Preferred Stock in exchange  for the
conversion of the convertible promissory notes and accrued interest in  the amount of $26,444,000 and
$323,000, respectively. The effective conversion price was $11.00  per  share. Additionally,  in July  2012,
the Company issued 3,030,303 shares of Series J Preferred Stock  at $16.50  per  share for gross proceeds
of $50,000,000. Issuance costs associated with this offering were $2,204,000.

Series A Preferred Stock was issued  at $5.00  per  share; Series B Preferred Stock  was issued at
$5.75 per share; Series C Preferred Stock  was issued  at $3.56  per  share; Series D Preferred Stock was
issued at $4.67 per share; Series E Preferred Stock  was issued at  $9.76 per share; Series F Preferred
Stock was issued at $11.00 per share;  Series G  and Series H Preferred Stock were  issued at $9.79 per
share; Series I Preferred Stock was issued  at $11.00  per  share; and  Series J  Preferred Stock was issued
at $16.50 per share.

F-25

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

10. Preferred Stock and Stockholders’ Equity (Deficit) (Continued)

The following is the activity of the Preferred Stock for the  year ended December  31, 2013 and

2012:

December 31,
2012

Issuance of
Preferred
Stock

Exercise of
warrants

Accretion of
redemption
premium and
issuance costs
on Preferred
Stock

Conversion of
Preferred Stock
into Common
Stock

December  31,
2013

Series A

Shares . . . .
Amount . . .

$

107,000
535,000

Series B

Shares . . . .
Amount . . .

1,107,189
$ 12,733,000

Series C

Shares . . . .
Amount . . .

1,069,946
7,618,000

$

Series D

Shares . . . .
Amount . . .

1,583,568
$ 18,211,000

Series E

Shares . . . .
Amount . . .

1,633,082
$ 18,780,000

Series F

Shares . . . .
Amount . . .

2,000,000
$ 23,000,000

Series G

Shares . . . .
Amount . . .

1,934,359
$ 22,819,000

Series H

Shares . . . .
Amount . . .

2,013,424
$ 22,005,000

Series I

Shares . . . .
Amount . . .

2,433,328
$ 26,933,000

Series J

Shares . . . .
Amount . . .

3,030,303
$ 48,681,000

Total

Shares . . . .

16,912,199

Amount . . .

$201,315,000

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—

$—

—
— $

(107,000)
(535,000)

—
(1,107,189)
— $ (12,733,000)

—
— $

(1,069,946)
(7,618,000)

—
(1,583,568)
— $ (18,211,000)

—
(1,633,082)
— $ (18,780,000)

(2,000,000)
—
— $ (23,000,000)

—
(1,934,359)
— $ (22,819,000)

$

$

$

$

$

$

$

—
$ 868,000

(2,013,424)
$ (22,873,000)

—
$ 226,000

(2,433,328)
$ (27,159,000)

—
$1,226,000

(3,030,303)
$ (49,907,000)

—

(16,912,199)

$2,320,000

$(203,635,000)

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—

$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—
$—

—

$—

F-26

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

10. Preferred Stock and Stockholders’ Equity (Deficit) (Continued)

January 1,
2012

Issuance of
Preferred
Stock

Exercise of
warrants

Accretion of
redemption
premium and
issuance costs  on
Preferred Stock

December  31,
2012

Series A

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

$

107,000
535,000

Series B

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

1,107,189
$ 12,733,000

Series C

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

1,069,946
7,618,000

$

Series D

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

1,583,568
$ 18,211,000

Series E

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

1,633,082
$ 18,780,000

Series F

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

2,000,000
$ 23,000,000

Series G

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

1,712,960
$ 18,574,000

Series H

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

2,013,424
$ 20,546,000

$

$

$

$

$

$

$

$

—
— $

—
— $

—
— $

—
— $

—
— $

—
— $

—
— $

—
— $

—
— $

—
— $

—
— $

—
— $

—
— $

107,000
535,000

—
1,107,189
— $ 12,733,000

—
— $

1,069,946
7,618,000

1,583,568
—
— $ 18,211,000

—
1,633,082
— $ 18,780,000

—
2,000,000
— $ 23,000,000

221,399
—
— $2,802,000

—
$1,443,000

1,934,359
$ 22,819,000

—
— $

—
—
— $1,459,000

2,013,424
$ 22,005,000

Series I

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

Series J

Shares . . . . . . . . . . . . . . .
Amount . . . . . . . . . . . . . .

$

$

Total

—
2,433,328
— $26,767,000

—
3,030,303
— $47,796,000

$

$

—
—
— $ 166,000

2,433,328
$ 26,933,000

—
—
— $ 885,000

3,030,303
$ 48,681,000

Shares . . . . . . . . . . . . . . .

11,227,169

5,463,631

221,399

—

16,912,199

Amount . . . . . . . . . . . . . .

$119,997,000

$74,563,000

$2,802,000

$3,953,000

$201,315,000

Voting

Prior to the consummation of the IPO,  each  holder of outstanding  shares of Preferred Stock had
the right to one vote for each share of Common Stock into which such  Preferred Stock could then be
converted. The holders of shares of Preferred  Stock had full  voting rights  and powers equal  to  the
voting rights and powers of shares of Common Stock  and were entitled to notice  of any  stockholders’

F-27

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

10. Preferred Stock and Stockholders’ Equity (Deficit) (Continued)

meeting and voted together with the  holders  of Common Stock, with respect to any question upon
which holders of shares of Common Stock have the  right  to  vote, as a single class, including  without
limitation, actions to increase or decrease the aggregate number of authorized shares of Common Stock
and/or Preferred Stock.

Dividends

Prior to  the consummation of the IPO, the holders of each share of Series A, Series B, Series C,
Series D, Series E, Series F, Series G, Series H, Series  I and  Series J Preferred Stock  were entitled to
receive dividends when, as, and if declared by the Company’s  board of  directors in the following order
of preference: (i) the Series D, Series E, Series F, Series G,  Series H, Series  I  and Series J  Preferred
Stock, which ranked pari passu; (ii) the Series B and Series C Preferred Stock, which  ranked pari
passu; (iii) the Series A Preferred Stock; and  then  (iv) Common Stock.

Liquidation

Prior to  the consummation of the IPO, the assets of the Company legally available for  distribution

to stockholders were distributable in the  following  order of  priority:  (i) the holders  of the shares  of
Series D, Series E, Series F, Series G, Series H, Series  I and  Series J Preferred Stock,  which ranked
pari passu; (ii) the holders of the shares of Series  B and  Series C  Preferred Stock,  which ranked  pari
passu; (iii) the holders of the shares of  Series A Preferred Stock;  and (iv) the  holders of the shares of
Common Stock. Each series of Preferred  Stock  was  entitled to receive an  amount  per  share equal to
the greater of (1) the original issuance  price for such series, plus all  declared  but unpaid dividends
thereon, or (2) the amount that the holders of  such  series  would receive per share  of Common Stock  if
all shares of such series of Preferred Stock were  converted to Common Stock immediately prior to such
liquidation. If, upon a deemed liquidation event, the  assets of the Company were  insufficient to make
payment in full to all holders  of a series of Preferred  Stock, then such assets would  be  distributed
among the holders of such series of Preferred Stock at the time outstanding  ratably in  proportion to
the full amount to which they would otherwise be respectively entitled. The holders of Common  Stock
were entitled to receive, after the payment of the liquidation preference of all Preferred Stock
outstanding, the remaining assets of the Company on  a pro rata basis.

Conversion

Prior to  the consummation of the IPO, each issued  and outstanding share  of Preferred  Stock was

convertible into Common Stock at the holder’s option  at  any time after the date  of  issuance  or
automatically upon the occurrence of certain events as defined  in the Company’s  ninth amended and
restated certificate of incorporation, at a defined conversion rate.  Prior  to  the consummation of the
IPO, the number of shares of Common Stock into which one share  of  each series of Preferred Stock
was  convertible  was  as  follows,  after  giving  effect  to  the  reverse  stock  split  discussed  in  Note  18:  the
Series A Preferred Stock, 0.80; the Series B Preferred Stock, 0.85; the Series C  Preferred Stock, 0.75;
the Series D Preferred Stock, 0.75; the Series E Preferred Stock, 0.75; the  Series F  Preferred
Stock, 0.77; the Series G Preferred Stock, 0.75; the Series  H Preferred Stock, 0.75; the Series I
Preferred Stock, 0.75; and the Series J  Preferred Stock, 0.75.

The conversion price for each share of Preferred  Stock  was subject to adjustment upon the
occurrence of certain events. The conversion  price of each share of a series  of Preferred  Stock was

F-28

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

10. Preferred Stock and Stockholders’ Equity (Deficit) (Continued)

adjusted if the Company issued additional  shares, subject  to specified exceptions, at a price lower than
the then current conversion price for such series, which  is measured  and recognized if the contingency
occurs.

On July 30, 2013, immediately prior  to  the  consummation  of  the IPO,  all outstanding shares of
Preferred Stock automatically converted into shares of Common Stock  at the  applicable conversion
ratio then in effect. See Note 10.

Redemption

To the extent it was then lawfully able to do so,  the Company was required at any  time, upon

written request of the holders of at least  66.67% of  the then  outstanding Series  A, Series B and
Series C Preferred Stock collectively, or  upon written  request of the  holders of at  least  a majority of
the then outstanding shares of Series D, Series E and Series F Preferred Stock collectively, in  each case
as determined on an as-converted to Common Stock basis, to redeem the requested number of
outstanding shares of Series A Preferred Stock at $5.00 per share, Series  B Preferred Stock  at $11.50
per share, and Series C Preferred Stock  at $7.12 per share, and/or Series  D, E  and F Preferred Stock
at $11.50 per share, as the case may be.

In addition, to the extent it was lawfully  able  to  do so, the  Company was  required at any time,
upon written request of the holders of at least a majority  of the  then outstanding shares of Series  G
Preferred Stock, to redeem, from the  holders requesting  such redemption, the requested number of
outstanding shares of Series G Preferred Stock at  $11.50 per share.

To the extent it would have been lawfully able to do  so, the  Company would  have been required at

any time on or after September 21, 2013, upon written  request of the holders of at least a majority of
the then outstanding shares of Series H Preferred Stock, to redeem,  from the holders  requesting such
redemption, the requested number of outstanding shares of Series  H  Preferred Stock at  $11.50 per
share.

To the extent it would have been lawfully able to do  so, the  Company would  have been required at

any time on or after July 25, 2015, upon written request of the holders of at least  a majority of the
then  outstanding shares of Series I Preferred Stock, to redeem, from  the holders requesting such
redemption, the requested number of outstanding shares of Series  I Preferred  Stock at  $11.50 per
share.

To the extent it would have been lawfully able to do  so, the  Company would  have been required at

any time on or after July 27, 2015, upon written request of the holders of at least  a majority of the
then  outstanding shares of Series J Preferred Stock, to redeem, from the  holders requesting such
redemption, the requested number of outstanding shares of Series  J Preferred Stock at  $18.00 per
share.

If, upon any applicable redemption date,  defined as  60 days  after the  Company receives  the

written request for redemption, the funds  of  the  Company legally  available for  redemption of Preferred
Stock would have  been insufficient to redeem the  total  number  of shares  to be redeemed on that date,
those funds that were legally available  would have been used to redeem the maximum  possible number
of shares, ratably among the holders of such shares to be redeemed.  All remaining  shares not
redeemed would have remained outstanding until such time as additional  funds  became legally
available for redemption.

F-29

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

10. Preferred Stock and Stockholders’ Equity (Deficit) (Continued)

If more than one series of Preferred Stock had been contemporaneously subject  to  redemption,  the

redemption rights of the Preferred Stock would have followed  the  liquidation order of priority.  As of
December 31, 2012, Preferred Stock with an aggregate redemption  value  of  $103,122,000 was currently
redeemable.

Warrant Transactions

The Company issued 6,128 Series G Preferred  Stock  warrants in  connection with  a loan and
security agreement. Additionally, the Company  issued one Series G Preferred Stock warrant for every
two shares of Series G Preferred Stock purchased in  2009 and 2010. The warrants were  initially
recorded at their fair value calculated using  the Black-Scholes model, with  the following weighted
average assumptions: exercise price of $9.79, share price of $9.79,  expected  term of three years,
risk-free rate of 1.52% and volatility  of  85.46%.  The warrants are classified as liabilities because they
are exercisable for Preferred Stock, and the value  of  the  warrants is adjusted to current  fair value at
each reporting period end. For the years ended December 31, 2013,  2012 and 2011, the  Company
recorded $42,000, $367,000 and $1,287,000, respectively, in the consolidated statements of operations
related to the change in the fair value of  the outstanding warrants.

Immediately prior to the consummation  of  the  IPO,  the  6,128 Series G Preferred Stock warrants

outstanding were automatically converted into 4,597 Common Stock warrants (after  giving  effect  to  the
one-for-1.333 reverse stock split).

11. Stock-Based Compensation

In January 2008, the board of directors approved the 2007  Equity  Compensation Plan (the ‘‘2007

Plan’’), which amended, restated and renamed the Company’s 1999  Stock Based Compensation  Plan
(the ‘‘1999 Plan’’), which provided for  the  granting of incentive  and nonqualified  stock options  and
restricted stock to its employees, directors and consultants at the discretion  of  the board  of directors.
Under the 2007 Plan, the Company increased the number  of  shares reserved for  issuance  under the
2007 Plan such that the number of reserved  shares  is equal to 17% of the fully diluted  shares
calculated annually on December 10th.

Further,  in July 2013, the Company’s board of directors  and  stockholders approved, effective
immediately prior  to the listing of the  Common Stock on the  NASDAQ Global Market, the 2013
Equity Compensation Plan (the ‘‘2013 Plan’’), which amended, restated and renamed  the 2007 Plan.
Under the 2013 Plan, the Company may grant incentive stock options, non-statutory  stock  options,
stock appreciation rights, restricted stock, restricted stock units, deferred share awards, performance
awards and other equity-based awards to employees, directors and  consultants. The Company initially
reserved 6,107,831 shares of Common Stock for issuance, subject to adjustment as  set forth in  the 2013
Plan, of which 676,236 shares of Common Stock will be available for  future issuance.

Shares of Common Stock reserved for issuance under  the

2013 Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6,107,831

4,107,831

2013

2012

Stock options may be granted with exercise prices  of not less than  the estimated fair value of the

Common Stock on the date of grant  and  generally  vest over a period of up  to  four years. Stock  options

F-30

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

11. Stock-Based Compensation (Continued)

granted under the 2013 Plan generally  expire no  later than ten years from  the date  of  grant. A
summary of stock option activity for the years ended December 31,  2013 and 2012 is as follows:

Outstanding at December 31, 2010 . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Outstanding at December 31, 2011 . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Outstanding at December 31, 2012 . . . . . . . . . . . .
Granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Number of
Options

1,823,266
344,479
(99,896)
(41,453)

2,026,396
977,807
(438,556)
(1,500)

2,564,147
1,967,940
(81,204)
(106,518)

Weighted-
Average
Exercise
Price

$ 4.41
6.13
1.53
5.43

$ 4.81
12.51
2.90
1.53

8.10
14.60
1.93
12.23

Outstanding at December 31, 2013 . . . . . . . . . . . .

4,344,365

$11.05

Vested or expected to vest at December 31, 2013 .
Exercisable at December 31, 2013 . . . . . . . . . . . .

4,344,365
2,347,744

$11.05
$ 8.72

Weighted-
Average
Remaining
Contractual
Term
(in years)

6.09

6.39

7.52

7.91

7.91
6.63

At December 31, 2013 and 2012, the  aggregate  intrinsic  value  of the option liability recorded was
$0 and $11,967,000, respectively. During the  years  ended December 31, 2013 and  2012, the Company
granted 1,967,940 and 977,807 options  at an intrinsic  value of $0  at  the  grant date.

At certain times throughout the Company’s history, the Significant Holder has  afforded option
holders  the opportunity for liquidity in transactions in which options were exercised  and the  shares of
Common Stock issued in connection  therewith were  simultaneously  purchased by the Significant
Holder. Because the Company has established a pattern of  providing  cash settlement alternatives for
option holders, the Company has accounted  for its stock-based compensation  awards as liability awards,
the fair value of which is then re-measured at  each  balance sheet date. Upon the exercise of stock
options from January 1, 2013 through April 23,  2013, stock  option liabilities  of $38,000 were reclassified
to stockholders’ deficit.

On April 23, 2013, the Company distributed  a notification letter to all  equity award holders under
the 2007 Plan advising them that Purchase Transactions would no longer  occur, unless, at the  time of a
Purchase Transaction, the option holder has  held  the Common Stock issued upon exercise of options
for a period of greater than six months prior  to  selling such Common  Stock to the Significant Holder
and that any such sale to the Significant Holder would be at the  fair value of the Common Stock on
the date of such sale. Based on these  new  criteria for  Purchase  Transactions, the Company  remeasured
options outstanding under the 2007 Plan as of April 23, 2013 to their intrinsic value and  reclassified
such options from liabilities to stockholders’ deficit within  the Company’s consolidated balance sheets,
which  amounted to $14,482,000.

F-31

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

11. Stock-Based Compensation (Continued)

A roll forward of the stock option liability  balance for the  years  ended December  31, 2013 and

2012 is as follows:

Balance at December 31, 2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in intrinsic value upon re-measurement . . . . . . . . . . . . . . . . .
Settlements of option liability awards . . . . . . . . . . . . . . . . . . . . . . . .

$ 2,648,000
13,844,000
(4,525,000)

Balance at December 31, 2012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change in intrinsic value upon re-measurement . . . . . . . . . . . . . . . . .
Settlements of option liability awards . . . . . . . . . . . . . . . . . . . . . . . .
Reclassification to stockholders’ equity (deficit) . . . . . . . . . . . . . . . . .

11,967,000
2,553,000
(38,000)
(14,482,000)

Balance at December 31, 2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

—

The Company accounts for all stock-based  payments made after April 23, 2013 to employees and

directors using an option pricing model for estimating fair value.  Accordingly,  stock-based
compensation expense is measured based  on the  estimated  fair value of the  awards  on the  date of
grant, net of forfeitures. Compensation expense is recognized for the portion that is  ultimately  expected
to vest over the period during which the recipient renders the required  services  to  the Company using
the straight-line single option method. In accordance with  authoritative guidance, the fair  value of
non-employee stock based awards is re-measured as the awards  vest,  and  the  resulting increase in fair
value, if any, is recognized as expense in the period  the related services  are rendered.

The Company estimates the fair value  of  its  share-based awards to employees and  directors using
the Black-Scholes option pricing model. The Black-Scholes  model requires  the input of highly  complex
and subjective assumptions, including  (a) the expected stock price volatility, (b) the calculation of the
expected term of the award, (c) the risk free interest rate and (d) expected dividends. Due to the
Company’s limited operating history  and a lack of company  specific  historical and implied volatility
data, the Company has based its estimate  of expected  volatility  on the historical volatility of a  group of
similar companies that are publicly traded. When selecting these  public  companies on which it has
based its expected  stock price volatility, the Company selected  companies with comparable
characteristics to it, including enterprise value, risk profiles,  position  within the  industry,  and with
historical share price information sufficient to meet the  expected life of  the stock-based awards. The
historical volatility data was computed  using the daily closing prices for  the  selected companies’ shares
during the equivalent period of the calculated  expected term  of the stock-based awards. Due to its lack
of sufficient historical data, the Company  will continue to apply this process  until a sufficient  amount  of
historical information regarding the volatility  of  its  own stock price becomes available. The Company
has estimated the expected life of its employee  stock options using  the ‘‘simplified’’ method, whereby,
the expected life equals the arithmetic average of the vesting term  and the original contractual term of
the option. The risk-free interest rates for periods within  the expected  life of the option are based on
the U.S.  Treasury yield curve in effect during the period the options were granted. The Company  has
never paid, and does not expect to pay dividends in the foreseeable future.

Stock-based compensation expense includes stock options  granted to employees  and non-employees

and has been reported in the Company’s  statements  of operations  and comprehensive loss in  either
research and development expenses or  general  and  administrative expenses depending on the  function

F-32

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

11. Stock-Based Compensation (Continued)

performed by the optionee. No net tax benefits related to the stock-based compensation costs  have
been recognized since the Company’s  inception.

During the period from April 23, 2013 through  December  31, 2013, the Company granted options

to purchase shares of its Common Stock as follows:

Shares

Exercise Price

310,540
4,800
763,000
17,500
57,500
500
16,000
32,500
765,600

$13.28
$14.75
$15.00
$21.79
$28.81
$27.71
$14.67
$14.68
$13.48

The Company recorded $4,733,000 of compensation expense related to these options. The fair

value of these options was estimated using  the Black-Scholes  option pricing model with the  following
weighted-average assumptions: no dividend yield, volatility  of  77.00%, maximum  contractual  life of
5.87 years, and a risk-free interest rate  of 1.73%.

The weighted-average grant-date fair value of stock  options granted during the period from

April 23, 2013 through December 31, 2013  and  the years ended December 31, 2012  and 2011  was
$9.72, $0.00, and $0.00, respectively.  The fair value  of shares vested during  the years ended
December 31, 2013, 2012, and 2011 was $9,875,000, $5,554,000,  and  $1,712,000, respectively.

The Company recognized stock-based compensation expense as  follows for the years ended

December 31, 2013 and 2012:

Year ended December 31,

2013

2012

2011

General and administrative . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
Research and development

$4,845,000
3,170,000

$ 7,199,000
6,645,000

$3,000
3,000

$8,015,000

$13,844,000

$6,000

As of December 31, 2013, there was  $1,875,000 of unrecognized compensation  expense related to

the unvested liability awards, which is  expected to be recognized over  a  weighted-average period of
approximately  2.32  years.

As of December 31, 2013, there was  $3,597,000 of unrecognized compensation  expense related to

the unvested stock options issued from April 23,  2013 through  December 31,  2013, which  is expected to
be  recognized  over  a  weighted-average  period  of  approximately  3.65  years.  The  Company  accounts  for
stock options issued to nonemployees  using  a fair  value approach.

F-33

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

11. Stock-Based Compensation (Continued)

Information with respect to stock options outstanding  and  exercisable at December 31, 2013  is as

follows:

Exercise
Price

$1.33 - $2.67
$5.76 - 6.00
$6.13 - $7.53
$13.28 - $13.48
$14.67 - $15.00
$21.79 - $28.81

Shares

154,117
801,208
639,888
1,870,852
805,300
73,000

4,344,365

Weighted
Average
Remaining
Contractual
Life (years)

1.41
4.92
6.41
9.97
9.59
9.72

7.91

Exercisable

154,117
792,730
553,790
418,644
421,244
7,219

2,347,744

The aggregate intrinsic value is calculated as the  difference between the  exercise  price of the
underlying awards and the quoted price  of the Company’s  common stock for  those awards that have  an
exercise price currently below the closing  price.  The  intrinsic value of  options  exercised during the
years ended December 31, 2013, 2012, and 2011 was $1,076,000,  $4,510,000, and  $459,000, respectively.
At December 31, 2013 the aggregate intrinsic  value of options outstanding and vested options  were
$10,212,000 and $9,742,000, respectively.

12. Employee Benefit Plan

In October 2007, the Company established a 401(k) Retirement  Savings Plan. Employees are
eligible to participate in the plan as soon as they join  the Company if they are at least 21 years of  age
and work a minimum of 1,000 hours  per  year.  The  Company matches $0.50  ($0.60  beginning  January 1,
2014) for every dollar of the first 6% of payroll that employees invest, up to the legal  limit. Employer
contributions vest over four years at  the rate of 25% per year. For the years ended  December 31,  2013,
2012 and 2011, the Company contributed  $289,000, $159,000 and $131,000, respectively.

13. Commitments and Contingencies

Operating leases

In November 2010, the Company entered  into  a lease for 3,117  square feet of office space in
Pennington, New Jersey. The lease had  an original term  of  two years, with an option for two  additional
years. For the first two years of the lease,  the  Company was obligated to pay $4,400  per  month, or
$53,000 annually, beginning when possession of the facility was taken on February 1, 2011. The
Company was required to provide the  landlord a  $125,000 letter of credit,  the collateral for  which is
recorded  as restricted cash on the consolidated balance sheets.  This lease was renewed on February  1,
2012 with a 3.5% increase in the rent, to $5,000  per  month. On  October 2, 2012, the Company leased
an additional 2,130 square feet of office  space for $3,100 per month,  or $38,000 annually.

In January 2007, the Company entered into a  lease for 8,100 square  feet  of office and lab space in
Newtown, Pennsylvania, and in October  2009, the Company and  the  landlord  amended the  lease to add
three additional one-year options to extend the  lease term. The Company exercised  the first option  for
the period from April 1, 2012 to March  31, 2013 and the  second option for the period from April 1,

F-34

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

13. Commitments and Contingencies (Continued)

2013 to March 31, 2014 for rent of $11,000 per month.  In September 2012,  the Company sub-leased an
additional 1,356 square feet of office space for one year for $1,600  per  month, or  $19,000 annually.

Future minimum lease payments under these  non-cancellable leases having terms in excess of one

year as of December 31, 2013 are as follows:

2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total minimum lease payments . . . . . . . . . . . . . . . . . . . . . . . .

$245,000
39,000

$284,000

December 31, 2013

Rent expense was $309,000, $233,000  and $186,000 for the years ended  December 31, 2013, 2012

and 2011, respectively.

Employment agreements

The Company has entered into employment agreements with certain of its executives. The

agreements provide for, among other  things, salary,  bonus and  severance payments.

14. Research Agreements

The Company has entered into various  licensing and right-to-sublicense  agreements with

educational institutions for the exclusive use  of patents and patent applications, as well  as any patents
that may develop from research being conducted by such educational institutions in the field of
anticancer therapy, genes and proteins.  Results from  this research  have been licensed  to  the Company
pursuant to these agreements. Under one  of these agreements with Temple University  (‘‘Temple’’),  the
Company is required to make annual maintenance payments to Temple and royalty payments based
upon a percentage of sales generated  from any  products covered by the licensed  patents,  with minimum
specified royalty payments. As no sales  had been generated through December 31, 2013  under the
licensed patents, the Company did not incur any  royalty expenses  for  the years ended December 31,
2013, 2012 and 2011. In addition, the  Company is required to pay  Temple 25% of any  sublicensing fees
received by the Company. In September  2011, the Company made a payment to Temple  in the amount
of $1,875,000 in connection with the  collaboration agreement the Company  executed in July  2011 with
SymBio. Such payment was recorded  in  the consolidated statement of operations as research and
development expenses. In 2012, the Company  became  obligated to pay Temple $12,500,000  in
connection with the collaboration agreement  the Company  executed in  2012 with Baxter. Such expense
was recorded in the consolidated statement  of operations  as research and development  expenses. As of
December 31, 2012, $1,405,000 of this  amount  was  not yet paid  and was  included in accrued expenses
and other current liabilities in the consolidated balance sheets. This amount  was paid during 2013.

In May 2010, the Company signed a funding agreement  with the  Leukemia  and Lymphoma  Society

(‘‘LLS’’) to fund the development of  rigosertib.  Under this agreement,  the Company was entitled to
receive milestone payments of up to $10,000,000 through  2013 in connection with clinical trials to be
conducted. The aggregate milestone  payment amount was subsequently reduced  to  $8,000,000 pursuant
to an amendment signed in January 2013,  after which  LLS  was  not  obligated to fund any further
amounts. In the event that the research is  successful,  the Company must proceed with
commercialization of the licensed product or repay the amount funded. In addition, LLS  is entitled  to
receive regulatory and commercial milestone payments  and royalties from the  Company based  on the

F-35

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

14. Research  Agreements (Continued)

Company’s net sales of the licensed product, with  the amount of such milestone payments and royalties
not to exceed three times the amount funded ($24,000,000). During the year ended December 31,  2012,
in connection with the execution of the Baxter agreement  (Note  15), the Company  paid $1,000,000 to
LLS and recorded this amount in research and  development expenses.  This payment reduced the
maximum milestone and royalty payment obligation under  this  agreement to $23,000,000  at
December 31, 2013 and 2012. As a result of the  potential  obligation to repay the funds under this
arrangement, the milestone payments received through December 31, 2012 amounting to $8,000,000
have  been recorded as deferred revenue  at  December  31, 2013 and 2012 and will  be  recognized as
revenue commencing with the resolution  of  the  repayment contingency.

15. License and Collaboration Agreements

Baxter Agreement

In September 2012, the Company entered into a  development and  license  agreement with Baxter
granting Baxter an exclusive, royalty-bearing  license  for the research,  development, commercialization
and  manufacture (in specified instances)  of  rigosertib in all therapeutic indications in Europe  (the
‘‘Baxter Territory’’). In July 2012, Baxter  purchased  $50.0 million of the Company’s  Series J convertible
preferred stock, which converted to shares of Common  Stock  immediately prior to the  consummation
of the IPO. Baxter also invested $5.0 million in  the Company’s initial  public  offering in July  2013.

Under the terms of the agreement, the Company was initially required to perform research and

development to advance three initial rigosertib indications, rigosertib intravenous (‘‘IV’’) in higher risk
myelodysplastic syndrome (‘‘MDS’’) patients, rigosertib IV in pancreatic cancer  patients  and rigosertib
oral in  lower risk  MDS patients, through Phase 3, Phase 3 and Phase 2 clinical trials, respectively. In
December 2013, a pre-planned interim futility and safety analysis of the pancreatic cancer trial was
performed and the trial was discontinued. In February 2014, the Company announced top-line analysis of
a Phase 3  trial of rigosertib IV in higher risk MDS patients. Although the  results of this study showed
numerical  improvement in median overall survival in the rigosertib treated patients, the observed
improvement of 2.4 months did not meet the required level of statistical significance.  However, a
statistically  significant improvement in median overall survival was evident in  the subset of  patients  who
had progressed on or failed to respond to previous treatment with hypomethylating agents (HMAs).

If an additional Phase 3 clinical trial beyond the current  Phase  3 clinical trial in process for
rigosertib IV in higher risk MDS patients is required to obtain marketing approval  in the Baxter
Territory, the Company could require  Baxter to fund a percentage of the  costs of such additional trial
up to a specified maximum. At the completion of the current  Phase 2  trial for  rigosertib  oral  in lower
risk MDS patients and the review of the resulting data  and findings, the Company and Baxter will
decide whether or not to pursue further development of rigosertib  for  this indication. If  the Company
and  Baxter mutually agree to progress  the  development of rigosertib  oral  in lower risk MDS patients,
then  certain milestone payments will be payable  to  the  Company, and the  Company will be required  to
use its commercially reasonable efforts to progress the development  of  rigosertib for  this  indication to a
drug approval application in the Baxter  Territory. The  Company and Baxter  will work together for
potential future rigosertib indications, beyond the initial indications  noted above. Generally, if Baxter
chooses to participate in the development  of  additional indications, Baxter  will be responsible for a
percentage of all research and development  costs  and expenses and the  Company could earn additional
milestone payments. Baxter has full responsibility for all commercialization activities for the product in
the Baxter Territory, at Baxter’s sole cost  and expense.

F-36

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

15. License and Collaboration Agreements (Continued)

The Company and Baxter have agreed  to  negotiate a supply agreement under terms satisfactory to

both parties whereby the Company will supply Baxter with Baxter’s  required  levels of  product to
support commercialization efforts in the Baxter Territory. Baxter  also has the  right to engage third
parties for the manufacture and supply of its requirements  for the  licensed  product.

Under the terms of the agreement, Baxter made an  upfront payment of $50,000,000.  The  Company

is eligible to receive pre-commercial milestone payments of  up to an aggregate  of  $337,500,000 if
specified development and regulatory  milestones are achieved. The potential pre-commercial
development milestone payments to the Company  include the following:

(cid:127) $50,000,000 for achievement of the primary endpoint of a Phase 3 clinical  trial  for rigosertib IV
in higher risk MDS patients (the ‘‘MDS IV  indication’’) or mutual agreement of  the Parties to
file for any marketing approval in either the European  Union  as a whole or in  all  of the Big
Five  EU Countries;

(cid:127) $25,000,000 for the joint decision to proceed with the development of rigosertib for lower risk

MDS; and

(cid:127) $25,000,000 for each drug approval  application  filed for indications specified in  the arrangement

with Baxter.

The Company may also receive up to $212,500,000  in milestone payments  for regulatory approvals

of the rigosertib MDS indications specified  in the arrangement  with Baxter, each of which may be up
to and in excess of $100,000,000. The Company is  also  potentially  eligible to receive an additional
$20,000,000 pre-commercial milestone payment related to the timing  of  regulatory  approval of the
MDS IV indication in Europe. In addition  to  these pre-commercial milestones, the Company is eligible
to receive up to an aggregate of $250,000,000 in milestone  payments based  on Baxter’s achievement  of
pre-specified threshold levels of annual  net sales of rigosertib.  The Company will also be entitled to
receive royalties at percentage rates ranging from the low-teens to the low-twenties on  net sales  of
rigosertib by Baxter in the Baxter Territory.

The agreement with Baxter will remain in effect until the expiration of  all applicable royalty  terms
and  satisfaction of all payment obligations  in each licensed  country,  unless terminated earlier due to the
uncured  material breach or bankruptcy of a party, force majeure, or in the event of a  specified
commercial failure. The Company may terminate the agreement in the  event that Baxter  brings a
challenge against it in relation to the  licensed patents. Baxter  may  terminate  the agreement without
cause commencing after a specified period of time from the execution  of the agreement.

The Company determined that the deliverables under  the Baxter agreement include  the exclusive,

royalty-bearing, sublicensable license to rigosertib and  the  research and development services to be
performed by the Company. The Company  concluded  that the license had standalone  value to Baxter
and  was separable from the research  and development services because the  license is sublicensable,
there are no restrictions as to Baxter’s use of the license and  Baxter has significant research capabilities
in this field.

In determining the separate units of accounting,  the Company considered applicable accounting
guidance and noted that in an arrangement with  multiple  deliverables, the delivered  item or  items  shall
be considered a separate unit of accounting if  the  delivered item or items have value to the customer
on a stand-alone basis. The item or items  have value  on a stand-alone  basis if they are sold separately

F-37

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

15. License and Collaboration Agreements (Continued)

by any vendor or the customer could  resell the delivered  item(s)  on a stand-alone basis.  In  the context
of a customer’s ability to resell the delivered item(s),  this criterion does not require the  existence of  an
observable market for the deliverable(s).

The Baxter agreement allows Baxter to sublicense rigosertib and its ability to sublicense is not
contingent on the approval or right of first refusal  by the Company. The Company determined that
Baxter’s ability to sublicense the intellectual  property to others  demonstrates  that  the license  has stand-
alone value. In addition, at the time  of entering  into  the Baxter  agreement in September 2012, the
rigosertib program was in a Phase 3 clinical  trial for higher risk MDS, a Phase 3 clinical trial for
pancreatic cancer and a Phase 2 trial for lower risk MDS. The  protocols for the  clinical trials  had been
written and provided to Baxter and a Special Protocol  Assessment had already been  granted to the
Company by the FDA for higher risk MDS. These  later stage clinical trials, where protocols have been
prepared and trials are in process, can  be  completed more  easily by entities other than the Company,
as compared to earlier stage clinical  trials. The  remaining  services  to  be  performed  by  the Company are
not proprietary and could be performed by other qualified  parties. For  example, the Company  relies  on
clinical research organizations (‘‘CROs’’) to complete the clinical trials, and Baxter  could  engage the
same or similar CROs to complete the trials on its behalf. Although Baxter is not performing
development activities related to rigosertib, Baxter  possesses the  internal expertise (or a vendor could
be hired) to complete the efforts under the rigosertib  programs without further  assistance from  the
Company.

Baxter develops, manufactures and markets  products that save and sustain the lives of people with
hemophilia, immune disorders, infectious diseases, kidney disease, trauma, and other chronic and acute
medical conditions. As a global, diversified healthcare company, Baxter applies a unique combination of
expertise in medical devices, pharmaceuticals and biotechnology to create  products that advance patient
care worldwide. Baxter employs over  50,000 people, with  significant revenues and expenditures  for
research and development. Baxter has expertise  in completing  clinical  trials,  assessing clinical  trial
results and preparing regulatory filings and has also developed and obtained regulatory  and marketing
approval in Europe for numerous products  used  to  treat hematologic conditions. Baxter has  expertise
in rare hematologic conditions, and rigosertib is a natural  complement to Baxter’s  existing treatments
for patients with these conditions.

Baxter has the rights and full access to past and future intellectual  information in order to obtain

regulatory approval of rigosertib in Europe. In connection with the  Baxter agreement,  the Company
licensed to Baxter all information and all patents controlled  by the Company necessary for the
development, manufacture, use and sale of  rigosertib and all present and future formulations and
dosages in all present and future therapeutic indications  in  the licensed territory.

Accordingly, given Baxter’s ability to  sublicense under  the agreement and its ability internally or
with outside help to conduct the ongoing development  efforts, the Company  concluded that the license
has stand-alone value. In order to determine  if the license can  be  treated as a  separate unit  of
accounting, the Company also considered whether  there  is a general right of return associated  with the
license.  The $50,000,000 upfront payment received by  the Company is  non-refundable;  therefore, there
is no right of return for the license. As a result, the Company concluded that the license is  a separate
unit of accounting.

The Company was not able to establish  VSOE or TPE for either the license or the  research  and

development services and instead allocated the arrangement consideration between  the license  and

F-38

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

15. License and Collaboration Agreements (Continued)

research and development services based on their relative  selling prices  using BESP. Management
developed the BESP of the license using  a discounted cash flow model, taking into consideration
assumptions including the development  and commercialization timeline, discount  rate and probability  of
success. Management utilized a third party valuation specialist to assist with the determination of BESP
of the license. Management estimated the selling  price of the research and development services using
third party costs and a discounted cash flow model.  The estimated  selling prices utilized assumptions
including internal estimates of research and development personnel needed to perform  the research
and  development services; and estimates of expected cash outflows to third parties for  services  and
supplies over the expected period that  the services will be  performed.

The key assumptions in these models included the following  market  conditions and  entity-specific

factors: (a) the specific rights provided  under the license, (b) the stage  of  development of rigosertib
and  estimated remaining development and commercialization timelines, (c) the probability of
successfully developing and commercializing  rigosertib, (d) the  market  size including the associated
sales figures which generate royalty revenue, (e)  cost of goods sold, which  was assumed to be a
specified percentage of revenues based  on estimated cost of goods  sold  of a typical oncology product,
(f) sales and marketing costs,  which were  based on the costs required to field an oncology sales force
and  marketing group, including external costs required to promote an oncology  product, (g) the
expected product life of rigosertib assuming commercialization and (h) the competitive  environment.
The Company utilized a discount rate of 16%, representing the  cost of capital  derived from returns  on
equity for comparable companies.

Based on management’s analyses, it was  determined that the BESP of the license  was $120,000,000

and  the BESP of the research and development services was $20,600,000.  As noted above, the
Company received an up-front payment of $50,000,000 under the Baxter agreement,  which represents
the allocable agreement consideration. Based on the  respective BESPs, this payment was allocated
$42,400,000 to the license and $7,600,000 to the research  and  development  services. Since  the delivery
of the license occurred upon the execution of the Baxter agreement and  there was no general right of
return, $42,400,000 of the $50,000,000  upfront payment was recognized  upon  the execution of the
Baxter agreement. The portion allocated to research and development services is being recognized  over
the period of performance on a proportional  performance  basis through March 31,  2014. Management
estimated the period of performance to be the period necessary for completion of  the non-contingent
obligations to perform research and development  services required to advance the three  formulations of
rigosertib described above. For the years  ended  December  31, 2013 and  2012, the  Company recognized
$4,176,000 and $3,100,000, respectively,  of research  and development revenue under  the Baxter
agreement.

The Company and Baxter have agreed  to  establish a  joint committee to facilitate the governance

and  oversight of the parties’ activities under the  agreements. Management considered whether
participation on the joint committee  may  be  a  deliverable and determined  that  it was not a  deliverable.
Had management considered participation  on the joint committee  as a deliverable, it would  not  have
had  a material impact on the accounting  for the arrangement  based on the analysis of the estimated
selling price of such participation.

As noted above, in July 2012, Baxter  purchased  Series J  Preferred Stock. Because the Series J
Preferred Stock was acquired within several months  of the Baxter development and license agreement,
management considered whether the Preferred Stock was issued at  fair value and if not, whether the

F-39

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

15. License and Collaboration Agreements (Continued)

consideration received for the Preferred Stock ($50,000,000) or  for the  collaboration and  license
agreement ($50,000,000) should be allocated in  the financial statements in a  manner  differently than
the prices stated in the agreements. Management, with the  assistance of an outside  valuation specialist,
determined that the price paid by Baxter for  the Series J Preferred  Stock approximated its  fair value,
and  therefore the consideration received under  the agreements was allocated in accordance with terms
of the individual agreements.

SymBio Agreement

In July 2011, the Company entered into a license agreement with SymBio,  as subsequently

amended, granting SymBio an exclusive, royalty-bearing license  for the development and
commercialization of rigosertib in Japan and  Korea. Under  the SymBio license agreement,  SymBio  is
obligated to use commercially reasonable efforts  to  develop and obtain market approval for rigosertib
inside the licensed territory and the Company has similar obligations outside of the  licensed territory.
The Company has also entered into an agreement with SymBio providing  for it to supply  SymBio  with
development-stage product. Under the SymBio license  agreement, the Company also agreed  to  supply
commercial product to SymBio under specified  terms that  will  be  included in  a commercial supply
agreement to be negotiated prior to  the  first commercial sale of rigosertib. The supply of  development-
stage product and the supply of commercial product will be  at  the Company’s cost plus a  defined profit
margin. Sales of development-stage product have been de minimis. The  Company has additionally
granted SymBio a right of first negotiation  to  license  or  obtain the rights to develop and commercialize
compounds having a chemical structure  similar to rigosertib in  the licensed territory.

Under the terms of the SymBio license agreement, the  Company received an  upfront payment  of

$7,500,000. The Company is eligible to receive milestone  payments of up to an  aggregate  of $22,000,000
from SymBio upon the achievement of specified development and regulatory milestones for specified
indications. Of the regulatory milestones, $5,000,000 is due upon receipt  of marketing  approval in the
United States for rigosertib IV in higher risk MDS patients, $3,000,000 is  due  upon receipt  of
marketing approval in Japan for rigosertib IV in  higher risk MDS patients, $5,000,000 is  due  upon
receipt of marketing approval in the United  States for rigosertib oral  in lower  risk MDS  patients,
$5,000,000 is due upon receipt of marketing approval in  Japan  for  rigosertib  oral  in lower risk MDS
patients. Furthermore, upon receipt of marketing approval in the United  States  and Japan for an
additional specified indication of rigosertib, which we are currently not  pursuing, an  aggregate  of
$4,000,000 would be due. In addition to these pre-commercial milestones, the Company is eligible  to
receive tiered milestone payments based upon annual net sales of rigosertib by SymBio of up to an
aggregate of $30,000,000.

Further,  under the terms of the SymBio license agreement, SymBio will make royalty payments to

the Company at percentage rates ranging  from the mid-teens to 20% based on net sales of rigosertib by
SymBio.

Royalties will be payable under the SymBio agreement on a country-by-country  basis in  the

licensed territory, until the later of the expiration of marketing exclusivity in  those countries,  a specified
period  of time after first commercial  sale of rigosertib  in such country, or the  expiration of all valid
claims of the licensed patents covering rigosertib  or  the manufacture or  use of rigosertib in  such
country. If no valid claim exists covering the composition  of matter of rigosertib  or the use of or
treatment with rigosertib in a particular country before the expiration of the royalty term, and specified

F-40

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

15. License and Collaboration Agreements (Continued)

competing products achieve a specified market share  percentage in  such country, SymBio’s obligation to
pay the Company royalties will continue  at  a  reduced royalty  rate until the end  of the royalty term. In
addition, the applicable royalties payable to the Company may  be  reduced  if SymBio is required  to  pay
royalties to third-parties for licenses to intellectual  property rights necessary to develop, use,
manufacture or commercialize rigosertib  in the licensed  territory. The license agreement with  SymBio
will remain in effect until the expiration of the royalty term.  However,  the SymBio license  agreement
may be  terminated earlier due to the  uncured material  breach or  bankruptcy  of  a party, or force
majeure. If SymBio terminates the license  agreement  in these circumstances, its licenses to rigosertib
will survive, subject to SymBio’s milestone  and royalty  obligations, which  SymBio  may elect to defer
and  offset against any damages that may  be  determined to  be  due from the Company. In addition,  the
Company may terminate the license agreement in the event that  SymBio  brings a challenge  against it in
relation to the licensed patents, and SymBio  may terminate the license agreement without cause by
providing the Company with written notice within a specified  period  of time  in advance of termination.

The Company determined that the deliverables under  the SymBio agreement include  the exclusive,

royalty-bearing, sublicensable license to rigosertib, the research and development  services  to  be
provided by the Company and its obligation to serve on a joint committee. The Company  concluded
that the license did not have standalone value  to  SymBio and was not separable from the  research  and
development services, because of the uncertainty  of SymBio’s ability to develop rigosertib in the
SymBio territory on its own and the uncertainty  of SymBio’s ability to sublicense rigosertib and recover
a substantial portion of the original upfront  payment  of  $7,500,000 paid by SymBio to the  Company.

The supply of rigosertib for SymBio’s  commercial requirements is  contingent upon  the receipt of

regulatory approvals to commercialize rigosertib  in Japan and Korea.  Because the Company’s
commercial supply obligation was contingent upon  the receipt of future regulatory  approvals, and there
were no binding commitments or firm purchase orders pending for commercial supply at or  near the
execution of the agreement, the commercial supply obligation  is deemed to be contingent  and is not
valued as a deliverable under the SymBio agreement. If  SymBio orders the supplies from the Company,
the Company expects the pricing for this supply  to  equal its third-party manufacturing  cost plus  a
pre-negotiated percentage, which will not result in a significant incremental discount to market rates.

Due to the lack of standalone value for the license, research and development services, and joint
committee obligation, the upfront payment is being recognized ratably using the straight line  method
through  December 2027, the expected term of  the agreement. For  the years ended December 31, 2013,
2012 and 2011, the Company recognized revenues of $455,000, $455,000 and $227,000,  respectively,
under this agreement. In addition, the Company recognized revenues of  $122,000 and $48,000 for the
years ended December 31, 2013 and 2012,  respectively,  related to the supply  agreement with SymBio.

16. Preclinical Collaboration

In December 2012, we formed GBO, LLC, or GBO, an entity jointly-owned by both us and GVK

Biosciences Private Limited, or GVK. The purpose of GBO is to collaborate  on and develop two
programs through filing of an investigational new drug application  (‘‘IND’’) and/or  conducting  proof of
concept studies using the Company’s  technology  platform.

During the year ended December 31, 2013,  GVK made an  initial capital contribution of $500,000

in exchange for a 10% interest in GBO,  and the Company made an  initial capital contribution of a
sub-license to all the intellectual property  controlled  by the Company related to the  two specified

F-41

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

16. Preclinical Collaboration (Continued)

programs in exchange for a 90% interest.  Under the terms  of the joint venture agreement, GVK will
make additional capital contributions (with a minimum of $500,000) necessary to complete the  major
studies plus the exercise of the proof  on concept study option leading  to  deliverables under  the
programs including an IND approval  for one product and completion  of IND studies  for the  other
product. The GVK percentage interest in GBO  accordingly  may  change from the initial 10% to up  to
50%, depending on the amount of its total capital contributions.  The Company  evaluates its variable
interests in GBO on a quarterly basis  and has determined  that  it is the primary beneficiary.

For thirty days following the 15-month anniversary  of  the  commencement of either  of the two
programs, the Company will have an  option to (i) cancel the license and (ii) purchase all rights  in and
to that program. There are three of these buy-back scenarios depending  on the stage  of development of
the underlying assets. GVK will have operational control  of GBO and the Company will have  strategic
and  scientific control.

17. Related-Party Transactions

The Company has entered into a research  agreement, as subsequently  amended,  with the Mount

Sinai School of Medicine (‘‘Mount Sinai’’), with  which a member of its board of directors  and a
significant stockholder is affiliated. Mount  Sinai is undertaking research on  behalf of the Company on
the terms set forth in the agreements. Mount Sinai, in  connection  with the Company, will prepare
applications for patents generated from the  research. Results  from  all projects will belong exclusively to
Mount Sinai, but the Company will have an exclusive option  to  license  any inventions. Payments to
Mount Sinai for the years ended December 31, 2013, 2012  and  2011 were  $1,235,000, $1,230,000 and
$554,000, respectively. At December 31, 2013 and 2012, the Company had no outstanding  amounts
payable to Mount  Sinai.

The Company outsources the synthesis  of some  of  its  chemical compounds to vendors  in the

United States and in foreign countries.  A  supplier,  of which  a  member of the Company’s board  of
directors and a significant stockholder is an owner, produces  one  of these  compounds under  contract.
The Company’s aggregate payments for  these services for the years ended December 31,  2013, 2012
and  2011 were $0, $157,000 and $6,000, respectively. At  December  31, 2013 and 2012, the Company
owed this supplier $0 and $107,000, respectively,  which is included in accounts  payable on the
consolidated balance sheets.

The Company purchases chemical compounds  from corporations owned by a former  member  of its

board of directors. The Company’s aggregate payments to these  suppliers for  the years ended
December 31, 2013, 2012 and 2011 were $804,000, $410,000 and $970,000, respectively. At
December 31, 2013 and 2012, the Company owed  this supplier $50,000 and $0,  respectively, which is
included in accounts payable  on the  consolidated balance  sheets. The  Company also  rents  office space
in Pennington, New Jersey from a corporation related to these suppliers and  affiliated with the  former
member of the Company’s board of directors.

The Company has entered into a consulting agreement, with a member of its board  of  directors,
who is also a significant stockholder.  The board member  provides  consulting services  to  the Company
on the terms set forth in the agreement. Payments  to  this board member for the years ended
December 31, 2013, 2012 and 2011 were $182,000, $165,000 and $158,000, respectively.

F-42

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

18. Initial Public Offering

On July 24, 2013, the Company’s Registration  Statement was declared effective by the SEC,  and

on July 25, 2013, the Company’s Common Stock began trading on the NASDAQ Global Market under
the symbol ONTX.

On July 30, 2013, immediately prior  to  the  consummation  of  the IPO,  all outstanding shares of
Preferred Stock automatically converted into shares of Common Stock  at the  applicable conversion
ratio then in effect. As a result of the conversion, as of September 30, 2013, the Company had  no
shares of Preferred Stock outstanding.

On July 30, 2013, the Company completed the IPO. The  Company received net  proceeds of
$79,811,000 from the IPO, net of underwriting discounts and commissions and other estimated offering
expenses.

In preparation for the IPO, the Company’s board of directors  and  stockholders approved a
one-for-1.333 reverse stock split of the Company’s Common Stock.  The reverse  stock  split became
effective on July 17, 2013. All Common  Stock  share and per share amounts in  the consolidated
financial statements and notes thereto  have been retroactively adjusted for  all  periods  presented  to  give
effect to this reverse stock split, including reclassifying  an amount equal to the reduction in par value
of common stock to additional paid-in capital. The reverse stock split did  not  result in  a retroactive
adjustment of share amounts for the Preferred Stock. In addition, in  July 2013,  the Company’s  board of
directors and stockholders approved an amendment of the  Company’s certificate of incorporation  to,
among other things, change the definition of a designated public offering  to  remove the per share  price
requirement and to set the threshold at gross proceeds  to  the Company of at  least  $25.0 million.

F-43

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

19. Quarterly Data (unaudited)

Revenue . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating expenses:

2013

First
Quarter

Second
Quarter

Third
Quarter

Fourth
Quarter

$ 1,116,000

$

591,000

$ 1,116,000

$ 1,930,000

General and administrative . . . . . . . . . .
Research and development . . . . . . . . . . .

3,346,000
12,756,000

3,117,000
10,047,000

5,927,000
15,293,000

4,403,000
12,086,000

Total operating expenses . . . . . . . . . . .

16,102,000

13,164,000

21,220,000

16,489,000

Loss from operations . . . . . . . . . . . . . . . .

(14,986,000)

(12,573,000)

(20,104,000)

(14,559,000)

Change in fair value of warrant liability . . .
Interest expense . . . . . . . . . . . . . . . . . . . .
Other income, net . . . . . . . . . . . . . . . . . . .

14,000
—
127,000

(2,000)
(2,000)
15,000

(31,000)
(1,000)
47,000

61,000
(1,000)
(126,000)

Net loss before income taxes . . . . . . . . . . .
Income taxes . . . . . . . . . . . . . . . . . . . . . .

(14,845,000)
—

(12,562,000)
—

(20,089,000)
432,000

(14,625,000)
3,000

Net loss . . . . . . . . . . . . . . . . . . . . . . . . . .
Net loss attributable to non-controlling

interest . . . . . . . . . . . . . . . . . . . . . . . . .

Net loss attributable to Onconova

(14,845,000)

(12,562,000)

(20,521,000)

(14,628,000)

—

—

—

13,000

Therapeutics, Inc . . . . . . . . . . . . . . . . . .

(14,845,000)

(12,562,000)

(20,521,000)

(14,615,000)

Accretion of redeemable convertible

preferred stock . . . . . . . . . . . . . . . . . . .

(1,019,000)

(1,032,000)

(269,000)

—

Net loss applicable to common stockholders

$(15,864,000) $(13,594,000) $(20,790,000) $(14,615,000)

Net loss per share of common stock, basic

and diluted* . . . . . . . . . . . . . . . . . . . . .

$

(6.08) $

(5.21) $

(1.34) $

(0.68)

Basic and diluted weighted average shares

outstanding . . . . . . . . . . . . . . . . . . . . . .

2,607,406

2,609,495

15,480,416

21,419,208

F-44

Onconova Therapeutics, Inc.

Notes to Consolidated Financial Statements (Continued)

19. Quarterly Data (unaudited) (Continued)

Revenue . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating expenses:

2012

First
Quarter

Second
Quarter

Third
Quarter

Fourth
Quarter

$

198,000

$

220,000

$42,803,000

$ 2,969,000

General and administrative . . . . . . . . . . . .
Research and development . . . . . . . . . . . .

2,460,000
8,448,000

1,627,000
6,776,000

8,922,000
26,962,000

2,698,000
10,576,000

Total operating expenses . . . . . . . . . . . .

10,908,000

8,403,000

35,884,000

13,274,000

Loss from operations . . . . . . . . . . . . . . . . . .

(10,710,000)

(8,183,000)

6,919,000

(10,305,000)

Change in fair value of warrant liability . . . . .
Change in fair value option liability . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . .
Other income, net . . . . . . . . . . . . . . . . . . . .

(609,000)
—
(21,000)
541,000

999,000
—
(230,000)
(2,000)

Net loss before income taxes . . . . . . . . . . . .
Income taxes . . . . . . . . . . . . . . . . . . . . . . . .

(10,799,000)
—

(7,416,000)
—

(25,000)
—
(8,357,000)
28,000

(1,435,000)
—

2,000
—
—
41,000

(10,262,000)
—

Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net loss attributable to non-controlling

interest

. . . . . . . . . . . . . . . . . . . . . . . . . .

Net loss attributable to Onconova

(10,799,000)

(7,416,000)

(1,435,000)

(10,262,000)

—

—

—

—

Therapeutics, Inc . . . . . . . . . . . . . . . . . . .

(10,799,000)

(7,416,000)

(1,435,000)

(10,262,000)

Accretion of redeemable convertible

preferred stock . . . . . . . . . . . . . . . . . . . . .

(1,231,000)

(927,000)

(785,000)

(1,010,000)

Net loss applicable to common stockholders .

$(12,030,000) $(8,343,000) $ (2,220,000) $(11,272,000)

Net loss per share of common stock, basic

and diluted* . . . . . . . . . . . . . . . . . . . . . . .

$

(5.53) $

(3.84) $

(1.02) $

(4.89)

Basic and diluted weighted average shares

outstanding . . . . . . . . . . . . . . . . . . . . . . .

2,173,553

2,173,549

2,174,392

2,305,315

*

Earnings Per Share (EPS) in each quarter is computed  using the weighted-average number  of
shares outstanding during that quarter while  EPS for the full year  is computed using the weighted-
average number of shares outstanding during the  year.  Thus,  the sum  of the four  quarters’  EPS
does not equal the full-year EPS.

F-45