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Curis Inc

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FY2008 Annual Report · Curis Inc
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Curis is a drug development company that is

committed to leveraging its innovative signaling

pathway drug technologies to seek to create new

medicines for cancer. In expanding its drug

development efforts in the field of cancer, Curis is

building upon its previous experiences in targeting

signaling pathways for the development of next

generation targeted cancer therapies.

Dear Shareholders,

2008 and the early part of 2009 have been important periods for Curis, highlighted by significant clinical
development progress. Most notably, we achieved key goals and milestones related to our first-in-class
Hedgehog pathway inhibitor under development by our collaborator Genentech (Roche) as well as our
proprietary pipeline of targeted small molecule cancer drugs including CUDC-101, our first-in-class HDAC,
EGFR and Her2 inhibitor that is currently in Phase I clinical testing, and CUDC-305, our Hsp90 inhibitor for
which we expect to file an IND in mid-2009. We have also made good progress with several additional
promising preclinical targeted cancer programs.

In addition, we believe that we have systematically implemented a balanced business model comprised of a
pipeline of both partnered and proprietary assets. Our business model allows us to better address and manage
risk, while also allowing us to better capture prospective value for shareholders from our pipeline of promising
assets. We continue to proactively manage capital access risk, and we are exploring potential partnering
opportunities for our two lead proprietary compounds. If we can successfully execute this strategy, particularly
the consummation of a collaboration around at least one of our proprietary assets, we should be able to extend
our ability to continue funding operations well into 2011. We view this as a key objective since we believe that
other sources of funding may not be readily available in the foreseeable future.

We are extremely focused on developing enhanced therapies for patients suffering from various types of
cancer. The number of people diagnosed with cancer increases every year, and is projected to be the leading
cause of death by 2010, according to the International Agency for Research on Cancer, a division of the World
Health Organization. We are proud to be dedicated to the effort of addressing this significant unmet medical
need, and we also see a significant opportunity to create value for our shareholders through our efforts to develop
more effective drugs for these patients.

Hedgehog Pathway Inhibitor Program

Our most advanced drug candidate is GDC-0449, a first-in-class, orally-administered small molecule
Hedgehog pathway inhibitor that is being developed globally by Genentech (Roche) under our June 2003
collaboration agreement with Genentech. We are very pleased with the clinical progress of this program, which
recently included Genentech’s February 2009 initiation of a pivotal Phase II trial in advanced basal cell
carcinoma (BCC) and its initiation of Phase II clinical trials in metastatic colorectal cancer and in advanced
ovarian cancer in 2008. These three ongoing clinical trials of GDC-0449 also represent an important source of
non-dilutive capital to Curis, with the company receiving an aggregate of $12 million for the initiation of these
clinical trials over the last twelve months.

In the pivotal Phase II clinical trial of GDC-0449, Genentech will evaluate approximately 100 patients with
locally advanced or metastatic BCC in a global trial. This trial represents a significant development milestone for
GDC-0449 in locally advanced and metastatic BCC and builds upon the strong Phase I safety and efficacy data
demonstrated by the drug, which showed clinical benefit in a substantial proportion of advanced BCC patients.
We believe that advanced BCC represents a fast-to-market opportunity that could enable first market entry for a
compound that inhibits the Hedgehog signaling pathway. Most importantly, it could represent an important new
treatment option for patients suffering from advanced BCC.

We are pleased that GDC-0449 is also in Phase II clinical testing in colorectal and ovarian cancer
indications. Both colorectal and ovarian cancers continue to represent major unmet medical needs, particularly
here in the U.S. According to the American Cancer Society, colorectal cancer is the second leading cause of
cancer death in the U.S., and ovarian cancer is the eighth most common, causing more deaths in women than any
other cancer of the reproductive system.

In the Phase II colorectal cancer trial, Genentech will evaluate GDC-0449 in combination with the current
standard of care, FOLFOX or FOLFIRI chemotherapy in combination with bevacizumab. In the advanced

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ovarian cancer Phase II trial, GDC-0449 will be evaluated in patients in second or third complete remission.
Genentech has designed this trial to investigate whether the drug helps delay tumor regrowth following clinical
remission of cancer after second-line chemotherapy treatment for recurrent disease.

Genentech has indicated that if the proof-of-concept data from the colorectal or ovarian cancer trials are
positive, Genentech and Roche could consider a rapid expansion of development for the compound in additional
cancer indications. A decision by Genentech and Roche to increase their investment in additional cancer
indications could significantly increase the potential downstream value to Curis.

In addition to the three ongoing clinical trials that are run directly by Genentech, we are very pleased that
Genentech and the National Cancer Institute’s (NCI) Division of Cancer Treatment and Diagnosis have entered
into a collaborative relationship that will allow the NCI to explore GDC-0449 in additional cancer indications not
being evaluated by Genentech. We believe that clinical trials conducted under this arrangement may have a
significant impact on the overall development of GDC-0449, since they provide an opportunity to generate
additional data in tumor types not already under investigation and could help continue to discover potential new
applications for the drug. We look forward to the potential future initiation of clinical trials under this NCI
collaboration, which we hope will build on the exciting biological activity previously reported in BCC.

Another significant development to the GDC-0449 program was achieved in October 2008 when Genentech
granted a license to Roche for ex-U.S. rights to GDC-0449. Roche’s significant clinical development and
commercialization experience, particularly outside of the U.S., could greatly expand the potential value of
GDC-0449. Roche’s involvement and interest in the program is particularly encouraging given the recent merger
between Genentech and Roche.

Proprietary Targeted Cancer Programs

In addition to the Hedgehog pathway inhibitor program, we are very encouraged about our broad proprietary
pipeline of several classes of small molecule drug candidates that are designed to inhibit one or more validated
cancer targets. Our most advanced drug candidates in development are CUDC-101, a first-in-class HDAC, EGFR
and Her2 inhibitor, and CUDC-305, a novel and potentially best-in-class Hsp90 inhibitor. A majority of our
cancer programs are network-targeted drug candidates with an HDAC inhibitory component,
including
HDAC/Pi3K, HDAC/c-MET and HDAC/BCR-Abl.

We believe that adding HDAC inhibition to other targeted kinase inhibitors as a single agent may offer a
significant improvement over treatment with existing kinase inhibitors, which generally face problems of rapid
drug resistance and low response rates in cancer patient populations. Both internally generated data and
independently published data suggest that HDAC inhibition may enhance the effects of targeted therapy,
particularly through synergistic activity with receptor tyrosine kinase targets, such as EGFR and Her2. To
explore these data further, our scientists are designing network-targeted inhibitors using rational, synergistic
combinations designed as single small molecule drug candidates that seek to suppress primary cancer pathways
through receptor tyrosine kinase targeting, and also to achieve a blockade of the alternative resistance pathways
through HDAC inhibition.

CUDC-101 is our lead program from this pipeline and we began dosing patients in a Phase I clinical trial of
this drug candidate in August 2008. We have generated strong preclinical efficacy data in xenograft cancer
models using cell lines representing a broad range of cancers, including data that CUDC-101 demonstrates
efficacy in preclinical xenograft models of cancer cell lines that are unresponsive to existing EGFR, EGFR/Her2,
or HDAC inhibitors.

The Phase I trial is designed as an open-label dose escalation study of CUDC-101 in patients with advanced,
refractory solid tumors. The primary objectives of the Phase I trial are to evaluate the safety and tolerability of
escalating doses of CUDC-101 and to establish the maximum tolerated dose and dose limiting toxicities.

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Secondary objectives are to assess the pharmacokinetics, efficacy and ability of CUDC-101 to inhibit HDAC,
EGFR and Her2 in this patient population. The study is being conducted at two sites within the United States and
is expected to enroll between 18 and 40 patients across several dose-escalating cohorts. We are encouraged by
the early signs from this Phase I trial and are currently estimating that it will be completed in mid-2009.

We also are actively advancing our other preclinical drug candidates, including our Hsp90 inhibitor, CUDC-
305. We have completed CUDC-305’s GLP-toxicology testing and we are currently preparing for an IND filing,
which we expect to complete in mid-2009. As we advance this drug candidate towards clinical testing, we
continue to be actively involved in partnering discussions and hope to establish a collaboration for the compound
in 2009.

In addition to our progress with CUDC-101 and CUDC-305, we continue to engage in active preclinical
development efforts on our other targeted cancer programs, and we hope to select another development candidate
in 2009.

Following the events of 2008, we believe that Curis is well-positioned to meet its future goals and
objectives. We believe that the drugs that we are developing have the potential to change the landscape of
treatment for cancer patients, and we sincerely hope to be able to offer new and improved therapies for these
patients, which are so direly needed. Looking to 2009 and beyond, we remain focused on the continued evolution
of Curis as a leading targeted cancer drug development company.

I thank our shareholders for their continued support, our Board of Directors and our Clinical and Scientific
Advisory Boards for their expert guidance and our employees for their continued loyalty, hard work and
dedication. I look forward to providing you all with further updates on our targeted cancer pipeline as 2009
progresses.

Sincerely,

Daniel R. Passeri
President and Chief Executive Officer
Curis, Inc.

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form-10k

Curis 2008

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

(Mark one)
È ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

FORM 10-K

EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2008

OR
‘ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

EXCHANGE ACT OF 1934

Commission File Number 000-30347

CURIS, INC.

(Exact Name of Registrant as Specified in Its Charter)

DELAWARE
(State or other jurisdiction of
incorporation or organization)

04-3505116
(I.R.S. Employer
Identification No.)

45 Moulton Street
Cambridge, Massachusetts 02138
(Address of principal executive offices) (Zip Code)
617-503-6500
(Registrant’s telephone number, including area code)

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

Title of Each Class
Common Stock, $0.01 par value per share

Name of Each Exchange on Which Registered
The NASDAQ Stock Market

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

Indicate by check mark if the registrant

Act. Yes ‘ No È

is a well-known seasoned issuer, as defined in Rule 405 of the Securities

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

Act. Yes ‘ No È

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 È No ‘

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. ‘

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 ‘
Non-accelerated filer ‘
(Do not check if a smaller reporting company)

Accelerated filer È
Smaller reporting company È

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ‘ No È
The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant (without admitting that
any person whose shares are not included in such calculation is an affiliate) based on the last reported sale price of the common
stock on June 30, 2008 was approximately $62,390,000.

As of February 24, 2009, there were 63,653,698 shares of the registrant’s common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Specified portions of the registrant’s proxy statement for the annual meeting of stockholders scheduled to be held on June 3,
2009, which are to be filed with the Commission not later than 120 days after the close of the Registrant’s fiscal year ended
December 31, 2008 pursuant to Regulation 14A, have been incorporated by reference in Item 5 of Part II and Items 10-14 of Part III
of this Annual Report on Form 10-K.

CURIS, INC.

TABLE OF CONTENTS

Form 10-K

ITEM 1.

PART I
BUSINESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 2.

PROPERTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 3.

LEGAL PROCEEDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 4.

SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS . . . . . . . . . . . . . . . . .

PART II

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

MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES . . . . . . . . . . . . . . . . . . .

ITEM 6.

SELECTED FINANCIAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 8.

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA . . . . . . . . . . . . . . . . . . . . . . .

ITEM 9.

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING
AND FINANCIAL DISCLOSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE . . . . . . . . . . .

ITEM 11. EXECUTIVE COMPENSATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PART III

1

33

34

34

36

38

39

60

98

99

99

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

AND RELATED STOCKHOLDER MATTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

99

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR

INDEPENDENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

99

99

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES . . . . . . . . . . . . . . . . . . . . . . . . . .

100

SIGNATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

101

PART IV

PART I

This annual report on Form 10-K contains forward-looking statements that involve risks and uncertainties,
as well as assumptions that, if they never materialize or prove incorrect, could cause Curis’ financial, operating
and business results to differ materially from those expressed or implied by such forward-looking statements. All
statements other than statements of historical
fact are statements that could be deemed forward-looking
statements, including any expectations of revenue, expenses, earnings or losses from operations, or other
financial items; any statements of the plans, strategies and objectives of management for future operations; any
statements concerning product research, development and commercialization timelines; any statements of
expectation or belief; and any statements of assumptions underlying any of the foregoing. The risks, uncertainties
and assumptions referred to above include risks that are described in “Item 1A-Risk Factors” and elsewhere in
this annual report and that are otherwise described from time to time in our Securities and Exchange
Commission reports filed after this report.

The forward-looking statements included in this annual report represent our estimates as of the date of this
annual report. We specifically disclaim any obligation to update these forward-looking statements in the future.
These forward-looking statements should not be relied upon as representing our estimates or views as of any
date subsequent to the date of this annual report.

ITEM 1.

BUSINESS

Overview

We are a drug discovery and development company that is committed to leveraging our innovative signaling
pathway drug technologies in seeking to develop next generation targeted cancer therapies. In expanding our
drug development efforts with respect to these targeted cancer programs, we are building upon our past
experiences in targeting signaling pathways, including the Hedgehog pathway. We seek to conduct research
programs both internally and through strategic collaborations.

Our cancer programs include a Hedgehog pathway inhibitor program for which our collaborator Genentech
is conducting clinical trials on the lead molecule, GDC-0449. These trials include a pivotal Phase II clinical trial
in advanced basal cell carcinoma patients, as well as Phase II clinical trials in first-line metastatic colorectal
cancer and in advanced ovarian cancer patients. In addition to these trials, a Phase I clinical trial to treat
medulloblastoma patients was initiated by a third-party investigator under a Cooperative Research and
Development Agreement (CRADA) between Genentech and the National Cancer Institute (NCI). We anticipate
that additional clinical trials will be initiated in the future, including Phase II clinical trials in small cell lung and
pancreatic cancers, among others. While the initiation of future trials conducted under the CRADA will not result
in cash payments to us, we believe that such trials are important to the overall development of GDC-0449 since
they may provide a greater opportunity to generate additional data in tumor types other than those currently
under investigation by Genentech. We believe that GDC-0449 is the first Hedgehog pathway inhibitor to advance
to Phase II clinical testing. Moreover, we and our collaborator Genentech have substantial intellectual property
rights in the Hedgehog signaling pathway.

In addition to our Hedgehog pathway inhibitor program, since 2006 we have been applying our signaling
pathway-based preclinical drug development experience to develop cancer drug candidates that target biological
signaling pathways other than the Hedgehog pathway. However, unlike the Hedgehog pathway, a majority of
these targeted pathways have been clinically validated by others in various cancer indications. By directing our
efforts toward validated targets, we believe that we can expedite the drug development process by taking
advantage of the accumulated scientific knowledge base relating to these targets and the molecules that have
been developed to act on them. Our targeted cancer programs primarily consist of several proprietary drug
programs through which we have produced single small molecules that target one or more signaling pathways.
We believe that this approach of using a single small molecule to target critical nodes in various signaling
pathway networks may provide for a better therapeutic effect than many of the targeted cancer drugs currently

1

marketed or in development. Our lead candidate from these programs is CUDC-101, a small molecule that is
currently in Phase I clinical testing and is designed to target histone deacetylase (HDAC), epidermal growth
factor receptor (EGFR) and epidermal growth factor receptor 2 (Her2). In addition, we expect to file an
Investigational Drug Application (IND) for CUDC-305, a Heat Shock Protein 90 (Hsp90) inhibitor, in mid-2009,
and provided that we have adequate capital resources, begin clinical testing on this candidate during the second
half of 2009.

Product Development Programs

We are developing drug candidates to treat cancer. These product development initiatives, described in the
chart below, are being pursued using our internal resources or through collaboration with Genentech. We believe
that Genentech provides significant additional resources and clinical development expertise to our Hedgehog
pathway inhibitor program through our collaboration. In addition, this collaboration provides us with potential
future contingent cash payments upon the achievement of development and regulatory objectives and royalties on
future product sales, if any. Our product development initiatives are derived primarily from our intellectual
property portfolio related to the Hedgehog signaling pathway as well as to our other targeted cancer programs.

The table below summarizes our current research and development programs,

including the current

development status of each program.

Product Candidate

Hedgehog Pathway Inhibitor

- GDC-0449
- GDC-0449
- GDC-0449

Primary Indication

Collaborator/Licensee

Status

Advanced basal cell carcinoma
Metastatic colorectal cancer
Advanced ovarian cancer

Genentech
Genentech
Genentech

Pivotal Phase II
Phase II
Phase II

Targeted cancer programs

- CUDC-101 (HDAC, EGFR, Her2 inhibitor)
- CUDC-305 (Hsp90 inhibitor)
- Other targeted cancer programs

Cancer
Cancer
Cancer

Internal development
Internal development
Internal development

Phase I
Development candidate
Preclinical

In the chart above, “Pivotal Phase II” means that our collaborator Genentech is currently treating human
patients in a pivotal Phase II clinical trial, the primary objective of which is a therapeutic response in human
patients. The endpoints of this clinical trial, if positive, may serve as the basis for a future New Drug Application
(NDA) submission by Genentech. “Phase II” means that our collaborator Genentech is currently treating human
patients in a Phase II clinical trial, the primary objective of which is a therapeutic response (i.e., for the
metastatic colorectal cancer trial, progression-free survival from randomization to disease progression or death).
“Phase I” means that we are currently treating human patients in a Phase I clinical trial, the principal purpose of
which is to evaluate the safety and tolerability of the compound being tested. “Development candidate” means
that based on in vitro and in vivo in several preclinical models of human disease of various compounds from a
particular compound class, we have selected a single lead candidate for potential future clinical development and
are seeking to complete the relevant safety, toxicology, and other data required to submit an IND application
with the Food & Drug Administration (FDA) seeking to commence a Phase I clinical trial. “Preclinical” means
we are seeking to obtain evidence of therapeutic efficacy in preclinical models of human disease of one or more
compounds within a particular class of drug candidates.

Since our inception in 2000, substantially all of our revenues have been derived from collaborations and
other agreements with third parties. For the year ended December 31, 2008, Genentech, which is our only current
collaborator, and Stryker Corporation, the assignee of our Bone Morphogenetic Protein (BMP) assets, accounted
for substantially all of our revenue, as follows: Genentech, $6,282,000, or 75%, and Stryker, $1,750,000, or 21%.

2

Hedgehog Pathway Inhibitor Program

Our Hedgehog pathway inhibitor technologies represent our most advanced program and are being
developed in various cancer indications under a June 2003 collaboration agreement with Genentech. Genentech
is a biotechnology company with broad expertise in the development and commercialization of cancer
therapeutics.

The Hedgehog signaling pathway controls the development and growth of many kinds of tissues in the body
by directly promoting cell division in specific cell types, and by activating other secondary signaling pathways
that control the synthesis of growth factors and angiogenic (blood vessel-forming) factors.

In recent years, it has been widely published that abnormal Hedgehog signaling may also contribute to the
growth of certain cancers, including basal cell carcinoma, breast, colorectal, esophageal, ovarian, pancreatic,
prostrate and small cell lung cancers, among others. Preclinical evidence suggests that Hedgehog protein
produced by tumor cells may signal adjacent stromal cells within the tumor environment to produce various
growth and angiogenic factors that can enhance tumor maintenance and growth. Systemic administration of our
Hedgehog signaling pathway inhibitors has been shown to slow or halt the progression of various types of tumors
in our preclinical models of cancer. We believe that Hedgehog pathway inhibitors selectively target fundamental
mechanisms involved in the maintenance and progression of tumor growth and, as such, may represent a new
generation of cancer therapeutics.

This preclinical scientific data, combined with strong Phase I efficacy data in advanced basal cell carcinoma
patients, has resulted in a broad clinical development effort by our collaborator Genentech. Genentech is
currently conducting three clinical trials of GDC-0449, an orally administered first-in-class Hedgehog pathway
inhibitor, as follows:

•

•

Pivotal Phase II advanced basal cell carcinoma clinical trial:
In February 2009, Genentech initiated
a pivotal Phase II clinical trial of GDC-0449 as a single-agent therapy for patients with metastatic or
locally advanced basal cell carcinoma (BCC). Genentech expects to evaluate GDC-0449 in
approximately 100 patients with metastatic or locally advanced BCC in a global single-arm, two-cohort
clinical trial. One cohort includes all patients with histologically-confirmed, RECIST measurable
metastatic BCC. RECIST provides standard parameters to be used when documenting patient response
for solid tumors. The second cohort includes histologically-confirmed locally advanced BCC that is
considered inoperable by the treating physician. All patients will receive a daily oral dose of
GDC-0449. This Phase II pivotal study builds upon the Phase I safety and efficacy data demonstrated
by GDC-0449, which showed clinical benefit in a substantial proportion of advanced BCC patients.
There is currently no standard of care for patients with these types of BCC and Genentech has indicated
that it designed this pivotal trial so that its data, if positive, may serve as the basis for NDA submission
by Genentech.

Upon initiation of this pivotal Phase II clinical trial, we earned $6,000,000 from Genentech, which we
expect to be paid during the first quarter of 2009.

Phase II first-line metastatic colorectal cancer clinical trial:
In May 2008, Genentech initiated a
Phase II clinical trial of GDC-0449 in metastatic colorectal cancer. GDC-0449 is being evaluated in
approximately 150 patients with metastatic colorectal cancer in combination with the current standard
of care in a randomized, placebo-controlled, double-blind Phase II trial. Patients receive either
FOLFOX or FOLFIRI chemotherapy in combination with Avastin and are randomized to receive
GDC-0449 or placebo. The primary objective of
from
randomization to disease progression or death. Secondary outcome measures include the measurement
of Hedgehog protein expression in archival tissue and tracking of adverse events.

is progression-free survival

the trial

Genentech made a $3,000,000 cash payment to us in May 2008 for the initiation of this Phase II
clinical trial.

3

•

Phase II advanced ovarian cancer clinical trial:
In December 2008, Genentech initiated a Phase II
clinical trial of GDC-0449 as a maintenance therapy for advanced ovarian cancer patients. GDC-0449
is being evaluated in approximately 100 patients with ovarian cancer in second or third complete
remission in a randomized, placebo-controlled, double-blind, multi-center Phase II trial. Patients are
randomized in a 1:1 ratio to receive either GDC-0449 or a placebo comparator and are stratified based
on whether their cancer is in a second or third complete remission. The primary endpoint of the trial is
progression-free survival. Secondary outcome measures include overall survival, measurement of
Hedgehog ligand expression in archival tissue and number and attribution of adverse events. We
believe that there is a significant unmet treatment need for patients with relapsed ovarian cancer. While
many advanced ovarian cancer patients initially experience clinical remission with current therapies,
the disease recurs for most patients. Genentech designed this Phase II trial to investigate if GDC-0449
may help delay tumor re-growth following clinical remission of cancer after second-line chemotherapy
treatment for recurrent disease.

Curis received a $3,000,000 cash payment from Genentech in December 2008 for the initiation of this
Phase II clinical trial. This is the final Phase II development objective under this collaboration for
which we are eligible for compensation.

In addition to GDC-0449, which is a small molecule, Genentech has also conducted preclinical research on
antibody-based Hedgehog pathway inhibitors. We expect to provide further updates on this program only if
Genentech determines to pursue clinical development of an antibody candidate from this program, as we
currently cannot predict whether Genentech will pursue the further development of Hedgehog antibody pathway
inhibitors.

including cancer

Under the terms of the June 2003 agreement with Genentech, we granted Genentech an exclusive, global,
royalty-bearing license, with the right to sublicense, make, use, sell and import small molecule and antibody
Hedgehog pathway inhibitors for human therapeutic applications,
therapy. We had
responsibilities to perform certain funded preclinical research activities and, from January 2005 through August
2006, co-funded clinical development costs for certain products. In November 2008, Genentech granted a license
to F. Hoffmann-LaRoche, Ltd (Roche) for ex-U.S. rights to GDC-0449. Roche received this license pursuant to
an agreement between Genentech and Roche under which Genentech granted Roche an option to obtain a license
to commercialize certain Genentech products in non-U.S. markets. We believe that the collaborative worldwide
development activities of Genentech and Roche could expand the potential value of this compound since Roche
brings significant additional clinical development and commercialization experience to advance and market
GDC-0449 outside of the U.S. Genentech and Roche have primary responsibility for worldwide clinical
development, regulatory affairs, manufacturing and supply, formulation and sales and marketing. We are not a
party to this agreement between Genentech and Roche but we are eligible to receive cash payments for regulatory
filing and approval objectives achieved and future royalties on products developed outside of the U.S., if any,
under our June 2003 collaboration agreement with Genentech.

Pursuant to the collaboration agreement, in June 2003 Genentech made up-front payments of $8,500,000,
which consisted of a $3,509,000 non-refundable license fee payment and a payment of $4,991,000 in exchange
for 1,323,835 shares of our common stock. Genentech also made license maintenance fee payments totaling
$4,000,000 over the first two years of the collaboration. We entered into three amendments to the June 2003
collaboration agreement. Pursuant to the amendments, Genentech increased its funded research commitment and
extended its funding obligation through December 2006. As part of these amendments, Genentech provided us
with $5,846,000 in incremental research funding over the period from December 2004 to December 2006 at
which time, all research funding ended. We do not expect to receive additional future research funding from
Genentech or incur any material research costs related to this program. The achievement of certain development
objectives as outlined in the agreement provides us with an important source of financing, resulting in a total of
$18,000,000, including the $6,000,000 we will receive in the first quarter of 2009 for the initiation of the pivotal
Phase II trial initiated in February. In addition to these payments, we will be eligible to receive additional future

4

cash payments from Genentech only upon the achievement of additional specified clinical development and
regulatory approval objectives, as well as royalties on product sales if any Hedgehog pathway inhibitor products
are successfully developed and commercialized.

Unless terminated earlier,

the agreement will expire six months after the later of the expiration of
Genentech’s obligation to pay royalties to us under the agreement or such time as no activities have occurred
under the agreement for a period of twelve months. The agreement may be terminated earlier, by either party for
cause, upon sixty days prior written notice. In addition, Genentech may terminate the agreement, either in whole
or in part, without cause, upon six months prior written notice. In the event of any termination where specific
license grants survive, we will continue to receive clinical development and regulatory approval milestones and
royalties on product sales for such licensed compound.

If we terminate the agreement for cause or Genentech terminates the agreement without cause, all licenses
granted to Genentech automatically terminate and revert to us. In addition, Genentech has agreed that it will no
longer conduct any development or commercialization activities on any compounds identified during the course
of the agreement for so long as such compounds continue to be covered by valid patent claims.

As a result of our licensing agreements with various universities, we are obligated to make payments to
these university licensors when we receive certain payments from Genentech. As of December 31, 2008, we have
incurred expenses of an aggregate of $600,000 related to such payments.

Our Proprietary Targeted Cancer Programs

Over the past several years, targeted cancer drugs have been considered among the most promising cancer
therapeutic effect with less toxicity when compared with traditional
treatments for obtaining better
chemotherapy, which, in addition to attacking cancerous cells, also tends to attack a broad range of healthy cells.
A large body of published data shows cancers to have multiple, intersecting signaling pathways that support
survival, growth, and invasion. Targeting only one or two of these pathways with single-targeted agents has
generally only led to modest improvements to existing standards-of-care and most cancer patients with solid
tumors do not respond in a clinically meaningful manner. Identifying the correct combination of critical targets
within the network of cancer cell signaling pathways wherein simultaneous blockade could provide a major
improvement in outcomes for cancer patients is an area of intense research and development.

In 2006, we utilized medicinal chemistry and our biological expertise to initiate a series of proprietary
targeted cancer drug programs. These programs focus on the development of single agent drug candidates
targeting one or more molecular components within the signaling pathways associated with certain cancers.
These programs are primarily focused on developing a number of proprietary, small molecule, single agent,
multi-targeted inhibitor drug compounds, including CUDC-101, the first drug candidate from these programs to
reach human clinical testing. Each proprietary compound is being designed to inhibit validated cancer targets,
including among others EGFR, Her2, Bcr-Abl tyrosine kinase and phosphatidylinositol-3-kinase (PI3k), and in
combination with inhibition of HDAC, which is a validated non-kinase cancer target. We are also seeking to use
this platform to develop proprietary single agent, single target drug candidates for cancer indications, including
CUDC-305, an Hsp90 inhibitor.

HDAC inhibition is a core component in each of our multi-targeted inhibitors. We believe that HDAC
inhibition is a very promising non-kinase target for cancer therapy, particularly when combined with
simultaneous inhibition of certain other targets. There is substantial preclinical evidence of synergistic induction
of cancer cell death when HDAC inhibitors are combined with a diverse range of other targeted therapies or
standard chemotherapeutic agents, demonstrating that HDAC inhibition may be more broadly effective in the
treatment of cancer when integrated with other inhibitory activities. Currently, there is one FDA-approved
HDAC inhibitor and several other HDAC-targeted drug candidates in clinical trials for cancer.

5

In furtherance of the development of our targeted cancer programs, since May 2006, we have outsourced
certain medicinal chemistry functions to a leading provider in Shanghai, China. We have developed these
relationships with Chinese providers to support our U.S. operations and we are currently engaging 17 chemists in
China. We believe that this relationship has been important to our efforts to create a broad portfolio of
proprietary cancer drugs.

We have filed a number of patents including a broad omnibus patent application that covers the drug design
concept that is the basis for our multi-targeted cancer programs, as well as numerous species filings relating to
specific classes of compounds which we believe will constitute novel compositions from a patentability
standpoint. We expect that we will continue to file additional patent applications covering new compositions in
the future.

We are concurrently engaged in collaboration discussions with several pharmaceutical and biotechnology
companies and are seeking to consummate a collaboration for one of our targeted inhibitors during 2009,
although we cannot be certain that such a collaboration will occur in the time frame expected, if at all.

CUDC-101

CUDC-101 is the first compound selected as a drug candidate from our targeted cancer programs.
CUDC-101 is designed as a first-in-class therapeutic to simultaneously inhibit HDAC, EGFR and Her2. In
preclinical studies, CUDC-101 demonstrated the potential to inhibit all three molecular targets resulting in the
potent killing of a wide range of cancer cell lines that are representative of a variety of human cancer types, many
of which have demonstrated resistance to various approved targeted agents.

While CUDC-101’s mechanism of action is not known, our data suggest that CUDC-101’s mechanism of
action involves the sensitization of cancer cells to EGFR and Her2 inhibition through HDAC inhibition.
CUDC-101 simultaneously inhibits both EGFR and Her2 at the receptor level while blocking downstream HDAC
inhibition within the cancer cells. Despite the existence of other multi-targeted inhibitors, CUDC-101 is unique
in its choice of targets which we believe enables a synergistic attack on multiple nodes or points in the overall
pathway network that are used by tumors to survive, grow, and invade surrounding tissue. Utilizing the same
targeted strategy with other currently available drugs would require combining two or three separate agents,
which typically have mismatched dosing schedules and tend to display additive dose limiting toxicities. In
contrast, we believe that CUDC-101, as a single small molecule, has the potential to act in the same cancer cells
at the same time with fewer toxic side effects and thus potentially represents an important advance in targeted
agent cancer therapy.

In August 2008, we initiated a Phase I trial of CUDC-101in patients with advanced, refractory solid tumors.
The primary objectives of this open-label Phase I trial are to evaluate the safety and tolerability of escalating
doses of CUDC-101 and to establish the maximum tolerated dose and dose limiting toxicities. Secondary
objectives are to assess the pharmacokinetics, efficacy and ability of CUDC-101 to inhibit HDAC, EGFR and
HER2 in this patient population. The study is being conducted at two sites within the United States and is
expected to enroll between 18 and 40 patients spread across several dose-escalating cohorts.

We currently expect to complete this Phase I trial in mid-2009.

CUDC-305

In July 2008, we selected CUDC-305 as a development candidate. In addition to demonstrating potent
efficacy across a broad range of cancers in preclinical cancer models, CUDC-305 exhibited promising
pharmacological features in preclinical testing, particularly its high oral bioavailability, high tumor penetration
and extended tumor retention. Most notably, Curis scientists observed complete tumor regression following oral
administration of CUDC-305 in a mouse xenograft model of acute myelogenous leukemia (AML). Tumor

6

regression has also been observed after treatment of CUDC-305 in mouse xenograft models of breast, non-small
cell lung, gastric and colon cancers as well as in glioblastoma brain cancers. In this preclinical testing, the
compound also demonstrated an ability to effectively cross the blood brain barrier, and demonstrated an ability to
extend survival in a preclinical intracranial glioblastoma model. We initiated IND-enabling studies during the
second half of 2008 and anticipate that, assuming the outcome of those studies is favorable and that we have
adequate capital resources, we will file an IND application for CUDC-305 in mid-2009.

Other Targeted Cancer Programs

We are also seeking to advance several other small molecule drug candidates from our targeted cancer
programs. Provided that we have adequate capital resources, we anticipate that we will select a compound from
one of these programs as a development candidate in the second half of 2009. Assuming that we meet this
selection timeline and that subsequent preclinical studies are successful, we anticipate that we would submit an
IND application for this additional development candidate during the second half of 2010.

Corporate Information

We were organized as a Delaware corporation in February 2000. We began our operations in July 2000
upon the completion of the merger of Creative BioMolecules, Inc., Ontogeny, Inc. and Reprogenesis, Inc. Our
principal executive office is located at 45 Moulton Street, Cambridge, Massachusetts, 02138 and our telephone
number is (617) 503-6500.

Curis™ and the Curis logo are our trademarks. This annual report on Form 10-K may also contain

trademarks and trade names of others.

Website Access to Reports

We maintain a website with the address www.curis.com. We are not including the information contained in our
website as part of, or incorporating it by reference into, this annual report on Form 10-K. Our website address is
included in this annual report on Form 10-K as an inactive textual reference only. We make available free of charge
through our website our annual reports on Form 10-K, our quarterly reports on Form 10-Q, current reports on Form
8-K and any such amendments to those reports as soon as reasonably practicable after we electronically file such
material with, or furnish such material to, the Securities and Exchange Commission. The Securities and Exchange
Commission maintains a website, www.sec.gov, that contains reports, proxy and information statements and other
information regarding issuers that file electronically with the SEC. The public may read and copy any materials we
file with the Securities and Exchange Commission at the SEC’s Public Reference Room at 110 F Street, N.E.,
Washington, D.C. 20549. In addition, we provide paper copies of our filings free of charge upon request. We also
make available on our website our corporate governance guidelines, the charters for our audit committee,
compensation committee and nominating and corporate governance committee, and our code of business conduct
and ethics, and such information is available in print to any stockholder of Curis who requests it.

Intellectual Property

Our policy is to obtain and enforce the patents and proprietary technology rights that are key to our business.
We intend to continue to file U.S. and foreign patent applications to protect technology, inventions and
improvements that are considered important to the development of our business. We will be able to protect our
proprietary technologies from unauthorized use by third parties only to the extent that our proprietary rights are
covered by valid and enforceable patents or are effectively maintained as trade secrets.

In the U.S., we have issued patents expiring on various dates between 2013 and 2023 as well as pending
patent applications. We have foreign counterpart patent filings for most of our U.S. issued patents and patent
applications. These patents and patent applications are directed to compositions of matter, methods of making
and using these compositions for multiple applications, methods for drug screening and discovery,
developmental biological processes, and patents relating to our proprietary technologies.

7

Targeted Cancer Drug Development Platform. We have filed U.S. provisional patent applications and
U.S. and foreign utility patent applications directed to our single- and multi-target inhibitor classes of novel small
molecules, as well as U.S. and foreign patent applications which generically claim the platform concept itself.
These patent applications claim compositions of matter, methods of manufacturing these molecules,
formulations, and methods of using these molecules to treat a variety of therapeutic indications. We intend to
continue to file additional U.S. and foreign applications as the program progresses.

Hedgehog Pathway. We have issued U.S. patents and allowed U.S. applications expiring on various dates
between 2013 and 2023, which relate to the Hedgehog pathway. Our patents and patent applications cover
proteins, nucleic acids, antibodies, and certain small molecule agonists and inhibitors of the Hedgehog pathway,
drug screening and discovery methods, methods of protein manufacturing, as well as methods of using the
aforementioned proteins, nucleic acids, antibodies or small molecules to activate or inhibit the Hedgehog
pathway for a variety of therapeutic indications or diagnostic uses. In addition, we have filed foreign patent
applications corresponding to many of the aforementioned U.S. filings that could provide additional patent
protection for products that activate or inhibit the Hedgehog pathway.

Our academic and research institution collaborators have certain rights to publish data and information
regarding their discoveries to which we have rights. While we believe that the prepublication access to the data
developed by our collaborators pursuant to our collaboration agreements will be sufficient to permit us to apply
for patent protection in the areas in which we are interested in pursuing further research, there is considerable
pressure on such institutions to rapidly publish discoveries arising from their efforts. This may affect our ability
to obtain patent protection in the areas in which we may have an interest. In addition, these collaboration
agreements typically contain provisions that provide us with, at a minimum, an option to license the institution’s
rights to intellectual property arising from the collaboration.

We are party to various license agreements that give us rights to commercialize various technologies,
particularly our Hedgehog pathway technologies, and to use technologies in our research and development
processes. Our most significant license agreements include our license agreements dated February 9, 1995 and
September 1, 2000 with the President and Fellows of Harvard University, each of which were amended and
restated effective June 10, 2003; a license agreement dated January 1, 1995 and as subsequently amended with
The Trustees of the Columbia University; a license agreement dated September 26, 1996, which was amended
and restated effective June 1, 2003, with the Johns Hopkins University and the University of Washington School
of Medicine; a license agreement dated May 3, 2000 with the Johns Hopkins University; and a February 12, 1996
license agreement with the Leland Stanford Junior University. The consideration payable in exchange for these
licenses includes up-front fees, issuances of shares of common stock, annual royalties, milestone payments and
royalties on net sales by our sub-licensees and us. The licensors may terminate these agreements if we fail to
meet certain diligence requirements, fail to make payments or otherwise commit a material breach that is not
cured after notice.

In addition, we depend upon trade secrets, know-how and continuing technological advances to develop and
maintain our competitive position. To maintain the confidentiality of trade secrets and proprietary information,
we require our employees, scientific advisors, consultants and collaborators, upon commencement of a
relationship with us, to execute confidentiality agreements and, in the case of parties other than our research and
development collaborators, to agree to assign their inventions to us. These agreements are designed to protect our
proprietary information and to grant us ownership of technologies that are developed in connection with their
relationship to us.

Research and Development Program

We have a research group that seeks to identify and develop new therapeutic applications for our existing
patent portfolio and seeks to identify new signaling pathways that may have therapeutic potential. As of
December 31, 2008, our research group consists of 21 employees, consisting of molecular biologists, cell

8

biologists, pharmacologists and other scientific disciplines. In an effort to expand our research capabilities in a
fiscally prudent manner, we have also engaged 17 chemists on a contract basis at a leading preclinical service
provider in Shanghai, China.

During the years ended December 31, 2008, 2007 and 2006, our total company-sponsored research and
development expenses were approximately $13,092,000, $12,260,000 and $6,340,000, respectively, and our
collaborator-sponsored research and development expenses were approximately $134,000, $2,519,000 and
$8,250,000, respectively.

Regulatory Matters

FDA Requirements for New Drug Compounds

Numerous governmental authorities in the U.S. and other countries extensively regulate, among other
things, the research, testing, manufacture, import and export and marketing of drug products. In the U.S., drugs
are subject to rigorous regulation by the Food and Drug Administration, or FDA. The Federal Food, Drug, and
Cosmetic Act, and other federal and state statutes and regulations, govern, among other things, the research,
development, testing, manufacture, storage, recordkeeping, labeling, promotion, sampling and marketing and
distribution of pharmaceutical products. Failure to comply with applicable regulatory requirements may subject a
company to a variety of administrative or judicially imposed sanctions. These sanctions could include, among
other things, the FDA’s refusal to approve pending applications, withdrawal of approvals, clinical holds, warning
letters, product recalls, product seizures, total or partial suspension of our operations, injunctions, fines, civil
penalties or criminal prosecution.

The steps ordinarily required before a new pharmaceutical product may be marketed in the U.S. include
preclinical laboratory tests, animal tests and formulation studies under the FDA’s good laboratory practice, or
GLP, regulations; the submission to the FDA of a notice of claimed investigational exemption or an IND
application, which must become effective before clinical testing may commence; adequate and well-controlled
clinical trials to establish the safety and effectiveness of the drug for each indication for which FDA approval is
sought; submission to the FDA of a new drug application, or NDA, seeking approval to market the drug product;
satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the product is
produced to assess compliance with current good manufacturing practice, or cGMP, requirements; and FDA
review and approval of the new drug application. Satisfaction of FDA pre-market approval requirements
typically takes years, and the actual time required may vary substantially based upon the type, complexity and
novelty of the product or disease. Success in early stage clinical trials does not assure success in later stage
clinical trials. Data obtained from clinical activities is not always conclusive and may be susceptible to varying
interpretations that could delay, limit or prevent regulatory approval. Even if a product receives regulatory
approval, later discovery of previously unknown problems with a product, including new safety risks, may result
in restrictions on the product or even complete withdrawal of the product from the market.

Preclinical tests include laboratory evaluation of product chemistry and formulation, as well as animal trials
to assess the potential safety and efficacy of the product. The conduct of the preclinical tests and formulation of
compounds for testing must comply with federal regulations and requirements, including the FDA’s GLP
regulations. Preclinical testing is highly uncertain and may not be completed successfully within any specified
time period, if at all. Further, the successful completion of preclinical trials does not assure success in human
clinical trials. The results of preclinical testing are submitted to the FDA as part of an IND application, together
with manufacturing information and analytical and stability data of the drug formulation. The IND application
must become effective before clinical trials can begin in the United States. An IND application becomes effective
30 days after receipt by the FDA unless before that time the FDA places a clinical hold on the trials. In that case,
the IND application sponsor and the FDA must resolve any outstanding FDA concerns or questions before
clinical trials can proceed. If these concerns or questions are unresolved, the FDA may not allow the clinical
trials to commence.

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Clinical trials involve the administration of the investigational drug to healthy volunteers or patients under
the supervision of a qualified investigator. Clinical
trials must be conducted in compliance with federal
regulations and requirements, including good clinical practices, under protocols detailing, among other things,
the objectives of the trial, the parameters to be used in assessing safety and the effectiveness criteria to be
evaluated. Each protocol involving testing on U.S. subjects must be submitted to the FDA as part of the IND
application. The study protocol and informed consent information for patients in clinical trials must be submitted
to institutional review boards, or IRBs, for approval.

Clinical trials to support new drug applications for marketing approval are typically conducted in three
sequential phases, but the phases may overlap or be combined. In phase I, the initial introduction of the drug into
human subjects, the drug is tested to assess metabolism, pharmacokinetics and pharmacological actions and
safety, including side effects associated with increasing doses and, if possible, early evidence of effectiveness.
Phase II usually involves trials in a limited patient population, to determine dosage tolerance and optimum
dosage, identify possible adverse effects and safety risks, and provide preliminary support for the efficacy of the
drug in the indication being studied. If a compound demonstrates evidence of effectiveness and an acceptable
safety profile in phase II evaluations, phase III trials are undertaken to further evaluate clinical efficacy and to
further test for safety within an expanded patient population, typically at geographically dispersed clinical trial
sites to establish the overall benefit-risk relationship of the drug and to provide adequate information for the
labeling of the drug. Phase I, phase II or phase III testing of any product candidates may not be completed
successfully within any specified time period, if at all. The FDA closely monitors the progress of each of the
three phases of clinical trials that are conducted in the U.S. The FDA may, at its discretion, reevaluate, alter,
suspend or terminate the testing based upon the data accumulated to that point and the FDA’s assessment of the
risk/benefit ratio to the subject. The FDA, an institutional review board, or a clinical trial sponsor may suspend or
terminate clinical trials at any time for various reasons, including a finding that the subjects or patients are being
exposed to an unacceptable health risk. The FDA can also request additional clinical trials be conducted as a
condition to product approval. Finally, sponsors are required to publicly disseminate information about ongoing
and completed clinical trials on a government website administered by the National Institutes of Health, or NIH,
and are subject to civil money penalties and other civil and criminal sanctions for failing to meet these
obligations.

After successful completion of the required clinical testing, generally a new drug application, or NDA, is
prepared and submitted to the FDA. FDA approval of the NDA is required before marketing of the product may
begin in the United States. The new drug application must include the results of extensive preclinical and clinical
testing and a compilation of data relating to the product’s pharmacology, chemistry, manufacture, and controls.
In most cases, a substantial user fee must accompany the NDA.

If the FDA’s evaluation of the NDA and inspection of the manufacturing facilities are favorable, the FDA
may issue an approval letter, or, in some cases, a complete response letter. A complete response letter generally
contains a statement of specific conditions that must be met in order to secure final approval of the NDA. If and
when those conditions have been met to the FDA’s satisfaction, the FDA will typically issue an approval letter.
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 post-approval testing, including phase IV
trials, and surveillance to monitor the drug’s safety or efficacy and may impose other conditions, including
labeling restrictions and restrictions on distribution and use of the drug, which can materially impact the potential
market and profitability of the drug. Once granted, product approvals may be withdrawn if compliance with
regulatory standards is not maintained or problems are identified following initial marketing.

Once the new drug application is approved, a product will be subject to certain post-approval requirements,
including requirements for adverse event reporting, submission of periodic reports, and drug sampling and
distribution requirements. If new safety issues arise after approval, FDA may require the company to conduct
additional post-market studies to assess the risk, change the labeling to address the risk, or impose distribution
and use restrictions under a Risk Evaluation and Mitigation Strategy, or REMS. Additionally, the FDA strictly
regulates the promotional claims that may be made about prescription drug products. In particular, a drug may
not be promoted for uses that are not approved by the FDA as reflected in the drug’s approved labeling.

10

Moreover, the Department of Justice can bring civil or criminal actions against companies that promote drugs for
unapproved uses, based on the Federal Food, Drug, and Cosmetic Act, the False Claims Act and other federal
laws governing reimbursement for drugs under the Medicare and Medicaid laws. Monetary penalties in such
cases have often been in excess of $100 million and in some cases have exceeded $1 billion. In addition, the
FDA requires substantiation of any claims of superiority of one product over another including, in many cases,
requirements that such claims be proven by adequate and well-controlled head-to-head clinical trials. After
approval, some types of changes to the approved product, such as adding new indications, manufacturing
changes and additional labeling claims, are subject to FDA review and approval of a new NDA or NDA
supplement before the change can be implemented. Manufacturing operations must continue to conform to
cGMPs after approval. Drug manufacturers are required to register their facilities with the FDA and are subject to
periodic unannounced inspections by the FDA to assess compliance with cGMPs. Accordingly, manufacturers
must continue to expend time, money and effort in the area of production and quality control to maintain
compliance with cGMPs and other aspects of regulatory compliance.

If the FDA’s evaluation of the NDA submission or manufacturing facilities is not favorable, the FDA may
refuse to approve the NDA or issue a complete response letter. The complete response letter outlines the
deficiencies in the submission and may require additional testing or information in order for the FDA to
reconsider the application. Even with submission of this additional information, the FDA ultimately may decide
that the application does not satisfy the regulatory criteria for approval. With limited exceptions, FDA may
withhold approval of a NDA regardless of prior advice it may have provided or commitments it may have made
to the sponsor.

New Legislation

On September 27, 2007, the President signed the FDAAA. The new legislation grants significant new
powers to the FDA, many of which are aimed at improving the safety of drug products before and after approval.
In particular, the new law authorizes the FDA to, among other things, require post-approval studies and clinical
trials, mandate changes to drug labeling to reflect new safety information, and require risk evaluation and
mitigation strategies for certain drugs, including certain currently approved drugs. In addition, it significantly
expands the federal government’s clinical trial registry and results databank and creates new restrictions on the
advertising and promotion of drug products. Under the FDAAA, companies that violate these and other
provisions of the new law are subject to substantial civil monetary penalties.

While we expect

these provisions of the FDAAA, among others,

to have a substantial effect on the
pharmaceutical industry, the extent of that effect is not yet known. As the FDA issues regulations, guidance and
interpretations relating to the new legislation, the impact on the industry, as well as our business, will become clearer.
The new requirements and other changes that the FDAAA imposes may make it more difficult, and likely more costly,
to obtain approval of new pharmaceutical products and to produce, market and distribute existing products.

Foreign Regulation of New Drug Compounds

Approval of a drug product by comparable regulatory authorities will be necessary in foreign countries prior
to the commencement of marketing of the product in those countries, whether or not FDA approval has been
obtained. While clinical data generated in the U.S. may be accepted in many foreign jurisdictions in lieu of early
stage clinical trials (phase I), the approval procedure varies among countries and can involve requirements for
additional testing equivalent to phases II and III. The time required may differ from that required for FDA
approval and may be longer than that required to obtain FDA approval. There can be substantial delays in
obtaining required approvals from foreign regulatory authorities after the relevant applications are filed.

In Europe, marketing authorizations may be submitted under a centralized or decentralized procedure. The
centralized procedure is mandatory for the approval of biotechnology products and many pharmaceutical
products, and provides for the grant of a single marketing authorization, which is valid in all European Union
member states. The decentralized procedure is a mutual recognition procedure that is available at the request of
the applicant for medicinal products that are not subject to the centralized procedure.

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Hazardous Materials

Our research and development processes involve the controlled use of hazardous materials, chemicals and
radioactive materials and produce waste products. We are subject to federal, state and local laws and regulations
governing the use, manufacture, storage, handling and disposal of hazardous materials and waste products.

Competition

Our product candidates, if approved, will compete with existing and new products being developed by others
for treatment of the same indications. Competition in the development of human therapeutics and, in particular,
human therapeutics that target signaling pathways to treat cancers, is intense. Our competitors may include many
large pharmaceutical and biopharmaceutical companies, as well as specialized biotechnology firms. There are
several companies developing drug candidates that target the same cancer pathways that we are also targeting
utilizing our proprietary targeted cancer programs. We believe that our competitive advantage over these companies
is our strategy of developing drug candidates to target unique combinations of these cancer pathways to achieve
synergistic effect. In addition to these competitors, we have identified biotechnology and pharmaceutical companies
that claim to have intellectual property rights and drug development programs relating to compounds that modulate
the Hedgehog pathway. Two of these companies, Infinity Pharmaceuticals, Inc. and Exelixis, Inc., filed IND
applications in 2008 for molecules in their respective Hedgehog pathway inhibitor programs.

Many of the companies competing against us have financial, marketing and human resource capacities that
are substantially greater than our own, which may provide these competitors with significant competitive
advantages over us. Others have extensive experience in undertaking clinical trials, in obtaining regulatory
approval to market products, in manufacturing products on a large scale and in effectively promoting products to
healthcare providers, health plans and consumers which may enhance their competitive position relative to ours.
Most of the major pharmaceutical and biotechnology companies are developing targeted cancer therapies. In
addition to competing with pharmaceutical, biotechnology and medical device companies, the products we are
developing would also compete with those being developed by academic and research institutions, government
agencies and other public organizations. Any of these organizations may discover new therapies, seek patent
protection or establish collaborative arrangements for products and technologies that are competitive with our
products and technologies.

The technologies underlying the development of human therapeutic products are expected to continue to
undergo rapid and significant advancement and unpredictable changes. Accordingly, our technological and
commercial success will be based, among other things, on our ability to develop proprietary positions in key
scientific areas and efficiently evaluate potential product opportunities.

The timing of a product’s introduction may be a major factor in determining eventual commercial success and
profitability. Early entry may have important advantages in gaining product acceptance and market share.
Accordingly, we believe the relative speed with which we or any current or future collaborator can complete
preclinical and clinical testing, obtain regulatory approvals, and supply commercial quantities of a product will have
an important impact on our competitive position, both in the U.S. and abroad. Other companies may succeed in
developing similar products that are introduced earlier, are more effective, or are produced and marketed more
effectively, or at a minimum obtain a portion of the market share. For example, our competitors may discover,
characterize and develop important targeted cancer molecules before we do, which could have a material adverse
effect on any of our related research programs. If research and development by others renders any of our products
obsolete or noncompetitive, then our potential for success and profitability may be adversely affected.

For certain of our programs, we rely on, or intend to rely on, strategic collaborators for support in our
research programs and for preclinical evaluation and clinical development of our potential products and
manufacturing and marketing of any products. Our strategic collaborators may conduct multiple product
development efforts within each disease area that is the subject of our strategic collaboration with them. Our

12

strategic collaboration agreements may not restrict the strategic collaborator from pursuing competing internal
development efforts. Any of our product candidates, therefore, may be subject to competition with a product
candidate under development by a strategic collaborator.

Manufacturing

We have no experience or capabilities in manufacturing. We have no current plans to develop
manufacturing capability and instead plan to rely on corporate collaborators or subcontractors to manufacture
products. If any of our current or planned collaborators or subcontractors encounters regulatory compliance
problems or enforcement actions for their own or a collaborative product, it could have a material adverse effect
on our business prospects.

Sales and Marketing

We have no sales, marketing or distribution experience or infrastructure and we have no current plans to
develop sales, marketing and distribution capabilities. We currently plan to rely on corporate collaborators for
product sales, marketing and distribution.

Scientific Governance

We have established a scientific advisory board as well as a clinical advisory board, each made up of
leading scientists and physicians in the field of cancer research and drug development. Members of these boards
consult with us on matters relating to our research and development programs, including clinical trial designs,
new technologies relevant to our research and development programs and other scientific and technical issues
relevant to our business.

The current members of our scientific advisory board are as follows:
Name

Position/Institutional Affiliation

Joseph M. Davie, Ph.D., M.D. (Chairman) . . . . . . .

Stuart Aaronson, M.D . . . . . . . . . . . . . . . . . . . . . . .

Kenneth Pienta, M.D . . . . . . . . . . . . . . . . . . . . . . . .

George Vande Woude, Ph.D . . . . . . . . . . . . . . . . . .

13

Director, Curis, Inc.
Director, CV Therapeutics, Inc.
Director, Keel Pharmaceuticals, Inc.
Director, GENTIAE Clinical Research, Inc.
Director, Ocera, Inc.
Director, Stratatech Corporation
Director, Targeted Genetics, Inc.
Director, BG Medicine
Director, Multiple Sclerosis Research Center of
New York
Institute of Medicine since 1987

Chairman of the Department of Oncological
Sciences and the Jane B. and Jack R. Aron
Professor of Neoplastic Diseases, Mount Sinai
School of Medicine

Professor, Internal Medicine and Urology and
Co-director, Urologic Oncology Program, The
University of Michigan Comprehensive Cancer
Center
Director, Translational Medicine Committee of
the Southwest Oncology Group (SWOG)
Principal investigator, The University of
Michigan’s Specialized Program of Research
Excellence (SPORE) in prostate cancer
awarded from the National Cancer Institute
Director, Van Andel Research Institute Co-
editor, Advances in Cancer Research

The current members of our clinical advisory board are as follows:

Name

Position/Institutional Affiliation

Kenneth Pienta, M.D (Chairman)

. . . . . . . . . . . . . .

See scientific advisory board table

Philip A. Philip, M.D.

. . . . . . . . . . . . . . . . . . . . . . .

Samir Witta, M.D., Ph.D. . . . . . . . . . . . . . . . . . . . . .

Professor of Medicine, Wayne State University
School of Medicine
Clinical Professor of Oncology, Barbara Ann
Karmanos Cancer Institute
Editorial Board Member, Internet Journal of
Oncology and Community Oncology Member,
American Pancreatic Association Member,
American Society of Clinical Oncology
American Board of Internal Medicine-Certified,
Internal Medicine and Medical Oncology

Clinical Assistant Professor, Internal Medicine,
Division of Oncology, University of Colorado
Cancer Center
Member, American Society of Clinical
Oncology

Employees

As of December 31, 2008, we had 34 full-time employees, of whom 15 hold a Ph.D. or other advanced
degree. Of these employees, 21 are currently involved in research and development. None of our employees is a
party to a collective bargaining agreement, and we consider our relations with our employees to be good.

14

ITEM 1A. RISK FACTORS

RISKS RELATING TO OUR FINANCIAL RESULTS AND NEED FOR FINANCING

We have incurred substantial losses, we expect to continue to incur substantial losses for the foreseeable
future and we may never generate significant revenue or achieve profitability.

As of December 31, 2008, we had an accumulated deficit of approximately $707,971,000. We have not
successfully commercialized any products to date, either alone or in collaboration with others. If we are not able
to successfully commercialize any products, whether alone or with a collaborator, we will not achieve
profitability. All of our drug candidates are in early stages of development. For the foreseeable future, we will
need to spend significant capital in an effort to develop products that we can commercialize and we expect to
incur substantial operating losses for the foreseeable future. Our failure to become and remain profitable is likely
to depress the market price of our common stock and could impair our ability to raise capital, expand our
business, diversify our research and development programs or continue our operations.

We may not be able to generate substantial revenue from existing or future collaborations.

We have historically derived a substantial portion of our revenue from the research funding portion of our
collaboration agreements. However, we have no current source of research funding revenue. We expect that our
only source of cash flows from operations for the foreseeable future will be:

•

•

•

up-front license payments and research and development funding that we may receive if we are able to
successfully enter into new collaboration agreements;

contingent cash payments that we may receive for the achievement of development objectives under
any new collaborations or our existing collaborations with Genentech; and

royalty payments that are contingent upon the successful commercialization of products based upon
these collaborations.

We may not be able to successfully enter into or continue any corporate collaborations and the timing,
amount and likelihood of us receiving payments under such collaborations is highly uncertain. As a result, we
cannot assure you that we will attain any further revenue under any collaborations or licensing arrangements.

We will require substantial additional capital, which is likely to be difficult to obtain.

We will require substantial funds to continue our research and development programs and to fulfill our
planned operating goals. In particular, our currently planned operating and capital requirements include the need
for working capital to support our research and development activities for CUDC-101, CUDC-305 and other
small molecules that we are seeking to develop from our pipeline of targeted cancer programs, and to fund our
general and administrative costs and expenses.

We anticipate that existing cash, cash equivalents and working capital at December 31, 2008, together with
the $6,000,000 we will receive from Genentech in the first quarter of 2009, should enable us to maintain current
and planned operations into mid-2010. Our future capital requirements, however, may vary from what we
currently expect. There are a number of factors that may adversely affect our planned future capital requirements
and accelerate our need for additional financing many of which are outside our control, including the following:

•

•

•

•

unanticipated costs in our research and development programs;

the timing and cost of obtaining regulatory approvals for our drug candidates;

the timing, receipt and amount of payments, if any, from current and potential future collaborators;

the timing and amount of payments due to licensors of patent rights and technology used in our drug
candidates;

15

•

•

the costs of preparing, filing, prosecuting, maintaining and enforcing patent claims and other patent-
related costs, including litigation costs and technology license fees; and

unexpected losses in our cash investments or an inability to otherwise liquidate our cash investments
due to unfavorable conditions in the capital markets.

We may seek additional funding through public or private financings of debt or equity. The market for
emerging life science stocks in general, and the market for our common stock in particular, is highly volatile.
Due to this and various other factors, including the currently adverse general market conditions and the early-
stage status of our development pipeline, additional funding may not be available to us on acceptable terms, if at
all. In addition, the terms of such a financing may be dilutive or otherwise adversely affect other rights of our
stockholders. We also expect to seek additional funds through arrangements with collaborators, licensees or other
third parties. These arrangements would generally require us to relinquish or encumber rights to some of our
technologies or drug candidates, and we may not be able to enter into such arrangements on acceptable terms, if
at all. If we are unable to obtain additional funding on a timely basis, whether through sales of debt or equity or
through third party collaboration or license arrangements, we may be required to curtail or terminate some or all
of our development programs, including some or all of our drug candidates.

We may face fluctuations in our operating results from period to period, which may result in a drop in our
stock price.

Our operating results have fluctuated significantly from period to period in the past and may rise or fall

significantly from period to period in the future as a result of many factors, including:

•

•

•

•

•

•

•

•

•

•

•

•

•

the cost of research and development that we engage in;

a failure to successfully complete preclinical studies and clinical trials in a timely manner or at all,
resulting in a delay in receiving, or a failure to receive,
the required regulatory approvals to
commercialize our drug candidates;

the timing, receipt and amount of payments, if any, from current and potential future collaborators;

the entry into, or termination of, collaboration agreements;

the scope, duration and effectiveness of our collaborative arrangements;

the costs involved in prosecuting, maintaining and enforcing patent claims;

the ability to operate without infringing upon the proprietary rights of others;

costs to comply with changes in government regulations;

changes in management and reductions or additions of personnel;

general and industry-specific adverse economic conditions that may affect, among other things, our and
our collaborators’ operations and financial results;

revenue recognition policies;

changes in accounting estimates, policies or principles; and

the introduction of competitive products and technologies by third parties.

Due to fluctuations in our operating results, quarterly comparisons of our financial results may not
necessarily be meaningful, and investors should not rely upon such results as an indication of our future
performance. In addition, investors may react adversely if our reported operating results are less favorable than in
a prior period or are less favorable than those anticipated by investors or the financial community, which may
result in a drop of our stock price.

16

Unstable market and economic conditions may have serious adverse consequences on our business.

Our general business strategy may be adversely affected by the recent economic downturn and volatile
business environment and continued unpredictable and unstable market conditions. If the current equity and
credit markets deteriorate further, or do not improve, it may make any necessary debt or equity financing more
difficult, more costly, and more dilutive. Failure to secure any necessary financing in a timely manner and on
favorable terms could have a material adverse effect on our growth strategy, financial performance and stock
price and could require us to delay or abandon clinical development plans. In addition, there is a risk that one or
more of our current service providers, manufacturers and other partners may not survive these difficult economic
times, which would directly affect our ability to attain our operating goals on schedule and on budget.

At December 31, 2008, we had $28,853,000 of cash equivalents and marketable securities consisting of
commercial paper, corporate debt securities, and government obligations. While as of the date of this filing, we are
not aware of any downgrades, material losses, or other significant deterioration in the fair value of our cash
equivalents or marketable securities since December 31, 2008, no assurance can be given that further deterioration
in conditions of the global credit and financial markets would not negatively impact our current portfolio of cash
equivalents or marketable securities or our ability to meet our financing objectives. Further dislocations in the credit
market may adversely impact the value and/or liquidity of marketable securities owned by us.

There is a possibility that our stock price may decline, due in part to the volatility of the stock market and

the general economic downturn.

RISKS RELATING TO THE DEVELOPMENT AND COMMERCIALIZATION OF OUR PRODUCTS

We depend on our collaborative relationship with Genentech and if Genentech fails or delays in
developing or commercializing drug candidates based upon our technologies, our business prospects and
operating results would suffer and our stock price would likely decline.

We currently have two collaborations with Genentech pursuant to which we have granted to Genentech
exclusive rights to develop and commercialize products based upon our technologies in defined fields of use,
including GDC-0449, an orally-administered small molecule pathway inhibitor of the hedgehog signaling
pathway. Genentech is currently testing GDC-0449 in two phase II clinical trials and a pivotal phase II trial in
advanced basal cell carcinoma. Our collaborations with Genentech are our only current collaborations, and these
collaborations may not be scientifically or commercially successful due to a number of factors, including the
following:

•

•

•

•

Genentech has significant discretion in determining the efforts and resources that it will apply to each
collaboration. The timing and amount of any cash payments related to future royalties and the
achievement of development objectives that we may receive under such collaborative arrangements
will depend on, among other things, Genentech’s efforts, allocation of resources and successful
development and commercialization of our drug candidates.

Our strategic collaboration agreements with Genentech permit Genentech wide discretion in deciding
which drug candidates to advance through the clinical trial process. It is possible for Genentech to reject
drug candidates at any point in the research, development and clinical trial process, without triggering a
termination of the collaboration agreement with us. In the event of any such decision, our business and
prospects may be adversely affected due to our inability to progress drug candidates ourselves.

Genentech may develop and commercialize, either alone or with others, products that are similar to or
competitive with the drug candidates that are the subject of its collaborations with us.

Genentech may change the focus of its development and commercialization efforts or pursue higher-priority
programs. Our ability to successfully commercialize drug candidates under collaboration with Genentech
could be limited if Genentech decreases or fails to increase spending related to such drug candidates.

17

•

•

including a merger,
into one or more transactions with third parties,
Genentech may enter
consolidation, reorganization, sale of substantial assets, sale of substantial stock or change of control.
For example, in February 2009, Roche Holdings Ltd announced that it is commencing a cash tender
offer for all outstanding publicly-held shares of Genentech for $86.50 per share that will expire on
March 12, 2009, unless the offer is extended. Any such third-party transaction, including a merger with
Roche, could: divert the attention of Genentech’s management and adversely affect Genentech’s ability
to retain and motivate key personnel who are important to the continued development of the programs
under our collaboration. In addition,
the third-party could determine to reprioritize Genentech’s
development programs such that it ceases to diligently pursue the development of our programs; and/or
cause the collaboration with us to terminate.

Genentech may, under specified circumstances, terminate its collaborations with us on short notice and
for circumstances outside of our control, which could make it difficult for us to attract new
collaborators or adversely affect how we are perceived in the scientific and financial communities.

If Genentech fails to successfully develop and commercialize our drug candidates under collaboration, we
may not be able to develop and commercialize these candidates independently or successfully enter into one or
more alternative collaborations, in which event our financial condition, results of operations and stock price may
be adversely affected.

We may not be successful in establishing additional strategic collaborations, which could adversely affect
our ability to develop and commercialize products.

Our current strategy is to seek corporate collaborators or licensees for the further development and
commercialization of one or more drug candidates under our targeted cancer drug programs. For example, we are
currently seeking corporate collaborations for CUDC-101 and CUDC-305, the first two drug candidates we have
selected from these programs. We do not currently have the experience, resources or capacity to advance these
programs into later stages of clinical development or commercialization. As such, our success will depend, in
part, on our ability to enter into one or more such collaborations. We face significant competition in seeking
appropriate collaborators and the negotiation process is time-consuming and complex. Moreover, we may not be
successful in our efforts to establish a collaboration or other alternative arrangements for CUDC-101, CUDC-305
or any future programs because our research and development pipeline may be insufficient, our programs may be
deemed to be at too early of a stage of development for collaborative effort and/or third parties may not view our
drug candidates and programs as having the requisite potential to demonstrate safety and efficacy. Even if we are
successful in our efforts to establish new collaborations, the terms that we agree upon may not be favorable to us.
If we are not able to successfully enter into one or more collaborations or licensing arrangements for CUDC-101,
CUDC-305 or any future programs, the clinical development of these programs could be significantly delayed
and our future prospects may be adversely affected and our stock price could decline.

The therapeutic efficacy of drug candidates under our targeted cancer programs is unproven in humans,
and we may not be able to successfully develop and commercialize CUDC-101, CUDC-305 or any other
future drug candidates that we may select from this program.

Our internal drug development efforts are focused on our proprietary targeted cancer programs. These
programs focus on the development of single agent drug candidates targeting one or more molecular components
within signaling pathways associated with certain cancers. We are also seeking to develop proprietary single
agent, single target drug candidates for cancer indications. We have currently selected two drug candidates from
this program for further development: CUDC-101, which is being designed to simultaneously inhibit HDAC,
EGFR and Her2, and CUDC-305, an orally available, synthetic small molecule inhibitor of Hsp90. In August
2008, we treated the first patient in a phase I trial of CUDC-101, and we initiated IND-enabling studies of
CUDC-305 in the second half of 2008.

CUDC-101 and CUDC-305 are novel compounds and their potential benefit as therapeutic cancer drugs is
unproven. These drug candidates may not prove to be effective inhibitors of the validated cancer targets they are

18

being designed to act against and may not demonstrate in patients any or all of the pharmacological benefits that
we believe they may possess or that may have been demonstrated in preclinical trials. Moreover, there is a risk
that these drug candidates may interact with human biological systems in unforeseen, ineffective or harmful
ways. As a result of these and other risks described herein that are inherent in the development of novel
therapeutic agents, we may never successfully develop, enter into third party licensing or collaboration
transactions with respect to, or successfully commercialize CUDC-101, CUDC-305, or any other drug candidates
under our targeted cancer drug development platform, in which case we will not achieve profitability and the
value of our stock will decline.

If preclinical studies and clinical trials of our drug candidates are not successful then our future
profitability and success could be adversely affected.

In order to obtain regulatory approval for the commercial sale of our drug candidates, we and any current or
potential future collaborators will be required to complete extensive preclinical studies as well as clinical trials in
humans to demonstrate to the FDA and foreign regulatory authorities that our drug candidates are safe and
effective. For example, our lead product candidate, GDC-0449, is currently being tested by our collaborator,
Genentech, in a pivotal phase II clinical trial in advanced basal cell carcinoma and two phase II clinical trials in
other cancer indications. In addition, in August 2008 we treated our first patient in a phase I clinical trial of
CUDC-101, the lead drug candidate from our pipeline of proprietary targeted cancer programs.

Development,

including preclinical and clinical

is a long, expensive and uncertain process.
Accordingly, preclinical testing and clinical trials of our drug candidates under development may not be
successful. We, Genentech and any future collaborators could experience delays or failures in preclinical or
clinical trials of any of our drug candidates for a number of reasons. For example:

testing,

•

•

•

•

•

•

•

preclinical studies or clinical trials may produce negative, inconsistent or inconclusive results, and we
or any collaborators may decide, or regulators may require us, to conduct additional preclinical studies
or clinical trials or terminate testing for a particular product candidate;

the results from preclinical studies and early clinical trials may not be statistically significant or
predictive of results that will be obtained from expanded, advanced clinical trials;

we may encounter difficulties or delays in manufacturing sufficient quantities of the product candidate
used in any preclinical study or clinical trial;

the timing and completion of clinical trials of our drug candidates depend on, among other factors, the
number of patients required to be enrolled in the clinical trials and the rate at which those patients are
enrolled, and any increase in the required number of patients, decrease in recruitment rates or
difficulties retaining study participants may result in increased costs, program delays or program
termination;

our products under development may not be effective in treating any of our targeted cancer indications
or may prove to have undesirable or unintended side effects, toxicities or other characteristics that may
prevent or limit their commercial use;

institutional review boards or regulators, including the FDA, or any collaborators may hold, suspend or
terminate our clinical research or the clinical trials of our drug candidates for various reasons, including
failure to achieve established success criteria, noncompliance with regulatory requirements or if, in
their opinion, the participating subjects are being exposed to unacceptable health risks; and

we, along with any of our current or potential future collaborators and subcontractors, may not employ,
in any capacity, persons who have been debarred under the FDA’s Application Integrity Policy.
Employment of such a debarred person may result in delays in FDA’s review or approval of our
products, or the rejection of data developed with the involvement of such person(s).

If the preclinical studies and/or clinical trials for any of our drug candidates that we, Genentech, and any
future collaborators pursue are not successful, then our ability to successfully develop and commercialize

19

products on the basis of the respective technologies will be materially adversely affected, our reputation and our
ability to raise additional capital will be materially impaired and the value of an investment in our stock price is
likely to decline.

We expect to rely primarily on third parties for the performance and management of clinical trials and if
such third parties fail to perform then we will not be able to successfully develop and commercialize drug
candidates and grow our business.

We have very limited experience in conducting later-stage clinical trials. We expect to rely primarily on
third parties to conduct our clinical trials and provide services in connection with such clinical trials. For
example, we have granted development and commercialization rights to Genentech under our existing
collaboration agreements with Genentech and we expect that any future collaboration partners may similarly be
fully responsible for conducting at least the later-stage clinical trials of drug candidates. In the near term, we
expect to rely primarily on third parties such as consultants, contract research organizations and other similar
entities to complete IND-enabling preclinical studies, create and submit IND applications, enroll qualified
subjects, conduct our clinical trials and provide services in connection with such clinical trials. Our reliance on
these third parties for clinical development activities will reduce our control over these activities. These third
parties may not complete activities on schedule, or may not conduct our clinical trials in accordance with the trial
design. In addition, the FDA requires us to comply with certain standards, referred to as good clinical practices,
for conducting, recording and reporting the results of clinical trials to assure that data and reported results are
credible and accurate and that the rights, integrity and confidentiality of trial participants are protected. Our
reliance on third parties that we do not control does not relieve us of these responsibilities and requirements. If
any of the third party contractors on whom we may in the future rely do not comply with good clinical practices
or other applicable regulatory requirements, we may not be able to use the data and reported results from the
trial. Any failure by a third party to conduct our clinical trials as planned or in accordance with regulatory
requirements could delay or otherwise adversely affect our efforts to obtain regulatory approvals for and
commercialize our drug candidates.

If we and our current and potential future collaborative partners do not obtain necessary regulatory
approvals, then our business will be unsuccessful and the market price of our common stock could
substantially decline.

We, Genentech and any potential future collaborative partners will be required to obtain regulatory approval
in order to successfully advance our drug candidates through the clinic and prior to marketing and selling such
products. The process of obtaining FDA and other required regulatory approvals is expensive. The time required
for FDA and other approvals is uncertain and typically takes a number of years, depending on the complexity and
novelty of the product. With respect to our internal programs, we have limited experience in filing and
prosecuting applications to obtain marketing approval.

Any regulatory approval to market a product may be subject to limitations on the indicated uses for which
we, or our collaborative partners, may market the product. These limitations may restrict the size of the market
for the product and affect reimbursement by third-party payors. In addition, regulatory agencies may not grant
approvals on a timely basis or may revoke or significantly modify previously granted approvals.

We are subject to, and our current and potential future collaborative partners are, or will be, subject to,
numerous foreign regulatory requirements governing the manufacturing and marketing of our potential future
products outside of the United States. The approval procedure varies among countries, additional testing may be
required in some jurisdictions, and the time required to obtain foreign approvals often differs from that required
to obtain FDA approvals. Moreover, approval by the FDA does not ensure approval by regulatory authorities in
other countries, and vice versa.

In addition, regulatory agencies may change existing requirements or adopt new requirements or policies. We and

any collaborative partners may be slow to adapt or may not be able to adapt to these changes or new requirements.

20

As a result of these factors, we and any collaborators may not successfully begin or complete clinical trials
and/or obtain regulatory approval to market and sell our drug candidates in the time periods estimated, if at all.
Moreover, if we or any collaborators incur costs and delays in development programs or fail to successfully
develop and commercialize products based upon our technologies, we may not become profitable and our stock
price could decline.

Recently enacted legislation may make it more difficult and costly for us to obtain regulatory approval of
our drug candidates and to produce, market and distribute products after approval.

On September 27, 2007, the President of the United States signed the Food and Drug Administration
Amendments Act of 2007, or the FDAAA. The FDAAA grants a variety of new powers to the FDA, many of
which are aimed at improving the safety of drug products before and after approval. Under the FDAAA,
companies that violate the new law are subject to substantial civil monetary penalties. While we expect the
FDAAA to have a substantial effect on the pharmaceutical industry, the extent of that effect is not yet known. As
the FDA issues regulations, guidance and interpretations relating to the new legislation, the impact on the
industry, as well as our business, will become clearer. The new requirements and other changes that the FDAAA
imposes may make it more difficult, and likely more costly, to obtain approval of new pharmaceutical products
and to produce, market and distribute products after approval.

Even if marketing approval is obtained, any products we or any current or potential future collaborators
develop will be subject to ongoing regulatory oversight, which may affect the successful commercialization
of such products.

Even if we or any current or potential future collaborators obtain regulatory approval of a product candidate,
the approval may be subject to limitations on the indicated uses for which the product is marketed or require
costly post-marketing follow-up studies. After marketing approval for any product is obtained, the manufacturer
and the manufacturing facilities for that product will be subject to continual review and periodic inspections by
the FDA and other regulatory agencies. The subsequent discovery of previously unknown problems with the
product, or with the manufacturer or facility, may result in restrictions on the product or manufacturer, including
withdrawal of the product from the market.

If there is a failure to comply with applicable regulatory requirements, we or any collaborator may be
subject to fines, refusal to approve pending applications or supplements, suspension or withdrawal of regulatory
approvals, product recalls, seizure of products, operating restrictions, refusal to permit the import or export of our
products and criminal prosecution.

We and Genentech are, and any potential future collaborators will be, subject to governmental regulations
in connection with the research, development and commercialization of our drug candidates in addition to
those imposed by the FDA. We and any such collaborators may not be able to comply with these
regulations, which could subject us, or such collaborators, to penalties and otherwise result in the
limitation of our or such collaborators’ operations.

In addition to regulations imposed by the FDA, we, our current collaborator, Genentech, and any potential
future collaborators are subject to regulation under, among other laws, the Occupational Safety and Health Act,
the Environmental Protection Act, the Toxic Substances Control Act, the Research Conservation and Recovery
Act, as well as regulations administered by the Nuclear Regulatory Commission, national restrictions on
technology transfer, import, export and customs regulations and certain other local, state or federal regulations.
From time to time, other federal agencies and congressional committees have indicated an interest
in
implementing further regulation of pharmaceutical and biotechnology applications. We are not able to predict
whether any such regulations will be adopted or whether, if adopted, such regulations will apply to our business,
or whether we or our collaborators would be able to comply with any applicable regulations.

21

Our research and development activities involve the controlled use of hazardous materials and chemicals.
Although we believe that our safety procedures for handling and disposing of such materials comply with all
applicable laws and regulations, we cannot completely eliminate the risk of accidental contamination or injury
caused by these materials.

If we or any of our current and planned collaborators fail to achieve market acceptance for our products
under development, our future revenue and ability to achieve profitability may be adversely affected.

Our future products, if any are successfully developed, may not gain commercial acceptance among
physicians, patients and third-party payors, even if necessary marketing approvals have been obtained. We
believe that recommendations and endorsements by physicians will be essential for market acceptance of any
products we successfully develop. If we are not able to obtain market acceptance for such products, our expected
revenues from sales of these products would be adversely affected and our business may not be successful.

RISKS RELATED TO OUR BUSINESS, INDUSTRY, STRATEGY AND OPERATIONS

We, our current collaborator, Genentech, and any potential future collaborators, may not achieve
projected research and development goals in the time frames we or they announce, which could have an
adverse impact on our business and could cause our stock price to decline.

We set goals for, and make public statements regarding, the timing of certain accomplishments, such as the
commencement and completion of preclinical studies, initiation and completion of clinical trials, and other
developments and milestones under our proprietary programs and those programs being developed under
collaboration agreements. Genentech has also made public statements regarding its expectations for the clinical
development of GDC-0449 and may in the future make additional statements about its goals and expectations for
this collaboration with us. The actual timing of these events can vary dramatically due to a number of factors
such as delays or failures in our and our current and potential future collaborators’ preclinical studies or clinical
trials, the amount of time, effort and resources committed to our programs by us and our current and potential
future collaborators and the uncertainties inherent in the regulatory approval process. As a result, there can be no
assurance that our or our current and potential future collaborators’ preclinical studies and clinical trials will
advance or be completed in the time frames we or they announce or expect, that we or our current and potential
future collaborators will make regulatory submissions or receive regulatory approvals as planned or that we or
our current and potential future collaborators will be able to adhere to our current schedule for the achievement
of key milestones under any of our internal or collaborative programs. If we or any collaborators fail to achieve
one or more of these milestones as planned, our business could be materially adversely affected and the price of
our common stock could decline.

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

Our drug candidates face competition from existing and new technologies and products being developed by
biotechnology, medical device and pharmaceutical companies, as well as universities and other research
institutions. For example, research in the Hedgehog signaling pathway is increasingly competitive. We are
developing Hedgehog-based therapies under our collaborations with Genentech in the field of cancer.
Competitors may discover, characterize and develop Hedgehog pathway inhibitor drug candidates before we do
or may compete with us in the same market sector.

In addition, our small molecule targeted cancer drug development candidates, which are focused primarily
on clinically validated cancer targets, face significant competition from marketed drugs and drugs under
development that seek to inhibit the same targets as our drug candidates.

22

Many of our competitors have substantially greater capital resources, research and development staffs and
facilities, and more extensive experience, than we have. As a result, efforts by other life science, medical device
and pharmaceutical companies could render our programs or products uneconomical or result in therapies
superior to those that we develop alone or with a collaborator.

For those programs that we have selected for internal development, we face competition from companies
that are more experienced in product development and commercialization, obtaining regulatory approvals and
product manufacturing. Other smaller companies may also prove to be significant competitors, particularly
through collaborative arrangements with large and established companies. As a result, any of these companies
may be more successful
in obtaining collaboration agreements or other monetary support, approval and
commercialization of their products and/or may develop competing products more rapidly and/or at a lower cost.
For those programs that are subject to a collaboration agreement, competitors may have greater expertise in
testing, obtaining regulatory
discovery, research and development, manufacturing, preclinical and clinical
approvals and marketing than our collaborators and, consequently, may discover, develop and commercialize
products that render our products non-competitive or obsolete.

We expect competition to intensify in cancer generally and, specifically, in targeted approaches to develop
potential cancer therapies as technical advances in the field are made and become more widely known. If we are
not able to compete effectively, then we may not be able, either alone or with others, to advance the development
and commercialization of our drug candidates, which would adversely affect our ability to grow our business and
become profitable.

The trend towards consolidation in the pharmaceutical and biotechnology industries may adversely affect
us.

There is a trend towards consolidation in the pharmaceutical and biotechnology industries. This
consolidation trend may result in the remaining companies having greater financial resources and discovery
technological capabilities, thus intensifying competition in these industries. This trend may also result in fewer
potential collaborators or licensees for our therapeutic product candidates. Also, if a consolidating company is
already doing business with our competitors, we may lose existing licensees or collaborators as a result of such
consolidation.

This trend may adversely affect our ability to enter

into agreements for

the development and

commercialization of our product candidates, and as a result may harm our business.

We could be exposed to significant monetary damages and business harm if we are unable to obtain or
maintain adequate product liability insurance at acceptable costs or otherwise protect ourselves against
potential product liability claims.

Product liability claims inherent in the process of researching, developing and commercializing human
health care products could expose us to significant liabilities and prevent or interfere with the development or
commercialization of our drug candidates. Regardless of their merit or eventual outcome, product liability claims
would require us to spend significant time, money and other resources to defend such claims, could result in
decreased demand for our future products or result in reputational harm and could result in the payment of a
significant damage award. We currently have product liability insurance for our phase I clinical trial of CUDC-
101. However, this insurance is subject to deductibles and coverage limitations and may not be adequate in scope
to protect us in the event of a successful product liability claim. If any of our drug candidates advance in clinical
trials and/or are approved for marketing, we may seek additional insurance coverage. Product liability insurance
is expensive and may be difficult to procure. As such, it is possible that we will not be able to obtain product
liability insurance on acceptable terms, if at all, or that our product liability insurance coverage will prove to be
inadequate to protect us from all potential claims, which may harm our business.

23

If we are not able to attract and retain key management and scientific personnel and advisors, we may not
successfully develop our drug candidates or achieve our other business objectives.

We depend upon our senior management and scientific staff, including Daniel R. Passeri, our President and
Chief Executive Officer, Michael P. Gray, our Chief Operating Officer and Chief Financial Officer, and
Changgeng Qian, Ph.D., M.D., our Vice President, Discovery and Preclinical Development. The loss of the
service of any of the key members of our senior management may significantly delay or prevent the achievement
of product development and other business objectives. Our officers can terminate their employment with us at
any time, although we are not aware of any present intention of any of these individuals to leave our company.
Replacing key employees may be difficult and may take an extended period of time because of the limited
number of individuals in our industry with the breadth of skills and experience required to research, develop and
successfully commercialize products in our areas of core competency. We do not maintain key man life
insurance on any of these executive officers.

Our ability to operate successfully will depend on our ability to attract and retain qualified personnel,
consultants and advisors. We face intense competition for qualified individuals from numerous pharmaceutical
and biotechnology companies, universities, governmental entities and other research institutions. We may be
unable to attract and retain these individuals, and our failure to do so would have an adverse effect on our
business.

While we have no current plans, in the future, we may seek to acquire complementary businesses and
technologies in the future or otherwise seek to expand our operations to grow our business, which may
divert management resources and adversely affect our financial condition and operating results.

We may seek to expand our operations in the future, including without limitation through internal growth
and/or the acquisition of businesses and technologies that we believe are a strategic complement to our business
model. We may not be able to identify suitable acquisition candidates or expansion strategies and successfully
complete such acquisitions or successfully execute any such other expansion strategies. We may never realize the
anticipated benefits of any efforts to expand our business. Furthermore, the expansion of our business, either
through internal growth or through acquisitions, poses significant risks to our existing operations, financial
condition and operating results, including:

•

•

•

•

•

a diversion of management from our existing operations;

increased operating complexity of our business, requiring greater personnel and resources;

significant additional cash expenditures to expand our operations and acquire and integrate new
businesses and technologies;

incurrence of debt, other liabilities and contingent liabilities; and

dilutive stock issuances.

Any business that we conduct in China will expose us to the risk of adverse changes in political, legal and
economic policies of the Chinese government, which changes could impede our preclinical efforts in China
and materially and adversely affect the development of our Targeted Cancer Programs.

We currently engage medicinal chemists in Shanghai, China, pursuant to an agreement with a medicinal
chemistry provider in Shanghai. In addition, we have a subsidiary in China, Curis Shanghai, which is currently
licensed but is not operational.

Conducting business in China exposes us to a variety of risks and uncertainties that are unique to China. The
economy of China has been transitioning from a planned economy to a more market-oriented economy. Although
in recent years the Chinese government has implemented measures emphasizing the utilization of market forces
for economic reform, the reduction of state ownership of productive assets and the establishment of sound

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corporate governance in business enterprises, a substantial portion of productive assets in China is still owned by
the Chinese government. In addition, the Chinese government continues to play a significant role in regulating
industrial development. It also exercises significant control over China’s economic growth through the allocation
of resources, controlling payment of foreign currency-denominated obligations, setting monetary policy and
providing preferential treatment to particular industries or companies. Efforts by the Chinese government to slow
the pace of growth of the Chinese economy could result in interruptions of our development efforts in China. If
our research and development efforts in China are delayed due to such interruptions, we may not realize the
reductions in costs anticipated from engaging chemists in China. We would also have to consider moving our
chemistry and/or biology research that is currently conducted in China to U.S. or European providers, thereby
either increasing our overall costs for such services or reducing the total number of chemists and or/biologists
that we could engage.

In addition, the Chinese legal system is a civil law system based on written statutes. Unlike common law
systems, it is a system in which decided legal cases have little precedential value. In 1979, the Chinese
government began to promulgate a comprehensive system of laws and regulations governing economic matters in
general. Accordingly, we cannot predict the effect of future developments in the Chinese legal system, including
the promulgation of new laws, changes to existing laws or the interpretation or enforcement thereof, or the
preemption of local regulations by national laws. Our business could be materially harmed by any changes in the
political, legal or economic climate in China or the inability to enforce applicable Chinese laws and regulations.

If the estimates we make and the assumptions on which we rely in preparing our financial statements
prove inaccurate, our actual results may vary significantly.

Our financial statements have been prepared in accordance with accounting principles generally accepted in
the United States. The preparation of these financial statements requires us to make estimates and judgments that
affect the reported amounts of our assets, liabilities, revenues and expenses, the amounts of charges taken by us
and related disclosure. Such estimates and judgments include the carrying value of our property, equipment and
intangible assets, revenue recognition and the value of certain liabilities. We base our estimates and judgments on
historical experience and on various other assumptions that we believe to be reasonable under the circumstances.
these estimates and judgments, or the assumptions underlying them, may change over time.
However,
Accordingly, our actual financial results may vary significantly from the estimates contained in our financial
statements.

For a further discussion of the estimates and judgments that we make and the critical accounting policies
that affect these estimates and judgments, see “Management’s Discussion and Analysis of Financial Condition
and Results of Operations—Critical Accounting Policies and Estimates” elsewhere in this annual report on
Form 10-K.

Compliance with changing regulation of corporate governance and public disclosure as well as potential
new accounting pronouncements is likely to impact our future financial position or results of operations.

Changing laws, regulations and standards relating to corporate governance and public disclosure, new SEC
regulations and NASDAQ Global Market rules are creating uncertainty for companies such as ours. These new or
changed laws, regulations and standards are subject to varying interpretations in many cases due to their lack of
specificity, and as a result, their application in practice may evolve over time as new guidance is provided by
regulatory and governing bodies, which could result in continuing uncertainty regarding compliance matters and
higher costs necessitated by ongoing revisions to disclosure and governance practices. In addition, future changes
in financial accounting standards may cause adverse, unexpected revenue fluctuations and affect our financial
position or results of operations. New accounting pronouncements and varying interpretations of pronouncements
have occurred with frequency in the past and may occur again in the future and as a result we may be required to
make changes in our accounting policies, for example the 2006 requirement under Statement of Financial
Accounting Standards No. 123 (revised 2004), or SFAS 123(R), to expense stock options.

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Our efforts to comply with evolving laws, regulations and standards have resulted in, and are likely to
continue to result in, increased general and administrative expenses and management time related to compliance
activities. We expect these efforts to require the continued commitment of significant resources. If our efforts to
comply with new or changed laws, regulations and standards differ from the activities intended by regulatory or
governing bodies due to ambiguities related to practice, our reputation may be harmed and we might be subject
to sanctions or investigation by regulatory authorities, such as the SEC. Any such action could adversely affect
our financial results and the market price of our common stock.

Failure to maintain effective internal controls in accordance with section 404 of the Sarbanes-Oxley act
could have a material adverse effect on our business and stock price.

Section 404 of the Sarbanes-Oxley Act of 2002 requires management’s annual review and evaluation of our
internal controls, and attestations of the effectiveness of our internal controls by our independent auditors. Our
failure to maintain the effectiveness of our internal controls in accordance with the requirements of section 404
of the Sarbanes-Oxley Act, as such standards are modified, supplemented or amended from time to time, could
have a material adverse effect on our business, operating results and stock price.

RISKS RELATING TO OUR INTELLECTUAL PROPERTY

If we or any of our licensees or assignees breach any of the agreements under which we license or transfer
intellectual property to others, we could be deprived of important intellectual property rights and future
revenue.

We are a party to intellectual property out-licenses, collaborations and agreements that are important to our
business, including our June 2003 and April 2005 collaboration agreements with Genentech and our December
2007 assignment agreement with Stryker Corporation, and we expect to enter into similar agreements with third
parties in the future. Under these agreements, we generally license or transfer intellectual property to third parties
and impose various research, development, commercialization, sublicensing, royalty, indemnification, insurance,
and other obligations on them. If a third party breaches its responsibilities under these agreements, we generally
retain the right to terminate the agreement, and to bring a legal action in court or in arbitration. In the event of
breach, we may need to enforce our rights under these agreements by resorting to arbitration or litigation. During
the period of arbitration or litigation, we may be unable to effectively use, assign or license the relevant
intellectual property rights and may be deprived of current or future revenues that are associated with such
intellectual property.

We in-license certain of our principal proprietary technologies, and if we fail to comply with our
obligations under any of the related agreements, or fail to secure any required new licenses, we could lose
license rights that are necessary to commercializing our drug candidates.

We are party to various license agreements that give us rights to commercialize various technologies,
particularly our Hedgehog pathway technologies, and to use technologies in our research and development
processes. Our most significant in-license agreements are with Harvard University, Columbia University, the
Johns Hopkins University both alone and with the University of Washington, and Leland Stanford Junior
University. Some of these license agreements impose various development, commercialization, funding, royalty,
diligence, and other obligations on us, which provide that our failure to meet any agreed upon requirements may
allow the licensor to terminate the agreement. Some of our license agreements grant us exclusive licenses to the
underlying technologies. If our licensors terminate our license agreements or if we are unable to maintain the
exclusivity of our exclusive license agreements, we may be unable to continue to develop and commercialize
certain of our drug candidates. In addition, continued development and commercialization of our drug candidates
may require us to secure licenses to additional technologies. We may not be able to secure these licenses on
commercially reasonable terms, if at all.

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We may not be able to obtain patent protection for our technologies and the patent protection we do
obtain may not be sufficient to stop our competitors from using similar technology.

The patent positions of pharmaceutical and life science companies, including ours, are generally uncertain
and involve complex legal, scientific and factual questions. The procedures and standards that the United States
Patent and Trademark Office and various foreign intellectual property offices use to grant patents, and the
standards that courts use to interpret patents, are not always applied predictably or uniformly and may be
changed in a significant way and are expected to continue to change. Consequently, the level of protection, if
any, that will be obtained and provided by our patents if we attempt to enforce them, and they are challenged, is
uncertain. The long-term success of our business depends in significant part on our ability to:

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obtain patents to protect our technologies and discoveries;

protect trade secrets from disclosure to third-party competitors;

operate without infringing upon the proprietary rights of others; and

prevent others from infringing on our proprietary rights.

Patents may not issue from any of the patent applications that we own or license. If patents do issue, the
type and extent of patent claims issued to us may not be sufficient to protect our technology from exploitation by
our competitors. In addition,
invalidated or
circumvented. Our patents also may not afford us protection against competitors with similar technology.
Because patent applications in the United States and abroad are maintained in secrecy until 18 months after
filing, it is possible that third parties have filed or maintained patent applications for technology used by us or
covered by our pending patent applications without our knowledge.

issued patents that we own or license may be challenged,

We may not have rights under patents that may cover one or more of our drug candidates. In some cases,
these patents may be owned or controlled by third-party competitors and may prevent or impair our ability to
exploit our technology. As a result, we or our current or potential future collaborative partners may be required to
obtain licenses under third-party patents to develop and commercialize some of our drug candidates. If we are
unable to secure licenses to such patented technology on acceptable terms, we or our collaborative partners may
not be able to develop and commercialize the affected product candidate or candidates.

We may become involved in expensive and unpredictable litigation, and in particular, patent litigation or
other intellectual property proceedings, which could result
in liability for damages or stop our
development and commercialization efforts.

Substantial, complex or extended litigation could cause us to incur large expenditures and distract our
management, and could result in significant monetary or equitable judgments against us. For example, lawsuits
by employees, licensors, licensees, suppliers, distributors, stockholders, or competitors could be very costly and
substantially disrupt our business. Disputes from time to time with such companies or individuals are not
uncommon, and we cannot assure that we will always be able to resolve such disputes out of court or on terms
favorable to us. Any claims, with or without merit, and regardless of whether we prevail in the dispute, would be
time-consuming, could result in costly litigation and the diversion of technical and management personnel.

In recent years, there have been substantial litigation and other proceedings regarding patent and other
intellectual property rights in the pharmaceutical and life science industries. We may become a party to patent
litigation or other proceedings regarding intellectual property rights.

Situations that may give rise to patent litigation or other disputes over the use of our intellectual property

include:

•

initiation of litigation or other proceedings against third parties to enforce our patent rights, to seek to
invalidate the patents held by these third parties or to obtain a judgment that our drug candidates do not
infringe the third parties’ patents;

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•

•

participation in interference proceedings to determine the priority of invention if our competitors file
U.S. patent applications that claim technology also claimed by us;

initiation of foreign opposition proceedings by third parties that seek to limit or eliminate the scope of
our patent protection in a foreign jurisdiction;

initiation of litigation by third parties claiming that our processes or drug candidates or the intended use
of our drug candidates infringe their patent or other intellectual property rights; and

initiation of litigation by us or third parties seeking to enforce contract rights relating to intellectual
property that may be important to our business.

The costs associated with any patent litigation or other proceeding, even if resolved favorably, will likely be
substantial. Some of our competitors may be able to sustain the cost of such litigation or other proceedings more
effectively than we can because of their substantially greater financial resources. If a patent litigation or other
intellectual property proceeding is resolved unfavorably, we or any collaborative partners may be enjoined from
manufacturing or selling our products and services without a license from the other party and be held liable for
significant damages. Moreover, we may not be able to obtain required licenses on commercially acceptable terms
or any terms at all. In addition, we could be held liable for lost profits if we are found to have infringed a valid
patent, or liable for treble damages if we are found to have willfully infringed a valid patent. Litigation results are
highly unpredictable and we or any collaborative partners may not prevail in any patent litigation or other
proceeding in which we may become involved. Any changes in, or unexpected interpretations of the patent laws
may adversely affect our ability to enforce our patent position. Uncertainties resulting from the initiation and
continuation of patent litigation or other proceedings could damage our ability to compete in the marketplace.

Our commercial success will depend in part on our ability to obtain and maintain protection of our
intellectual property, which covers inventions which may have been subject to chemistry or biology related
work performed by contract research organizations in China.

We rely on trade secrets, proprietary know-how and other non-patentable technology, which we seek to protect
through agreements containing non-disclosure and intellectual property assignment provisions with the chemists
and biologists we have engaged in China. We cannot assure you that these agreements will not be breached, that we
will have adequate remedies for any breach, or that our trade secrets, proprietary know-how and other
non-patentable technology will not otherwise become known to, or be independently developed by, our competitors.

Implementation and enforcement of Chinese intellectual property-related laws has historically been
inconsistent and damages assessed fail to reflect the true value of the infringed technology and its market.
Accordingly, intellectual property rights and confidentiality protections in China may not be as effective as in the
United States or other countries. Policing unauthorized use of proprietary technology is difficult and expensive,
and we might need to resort to litigation to enforce or defend patents issued to us or to determine the
enforceability, scope and validity of our proprietary rights or those of others. The experience and capabilities of
Chinese courts in handling intellectual property litigation varies, and outcomes are unpredictable. Further, such
litigation may require significant expenditure of cash and management efforts and could harm our business,
financial condition and results of operations. An adverse determination in any such litigation will impair our
intellectual property rights and may harm our business, prospects and reputation.

If we are unable to keep our trade secrets confidential, our technology and proprietary information may
be used by others to compete against us.

We rely significantly upon proprietary technology, information, processes and know-how that are not subject
to patent protection. We seek to protect this information through confidentiality and intellectual property license or
assignment provisions in agreements with our employees, consultants and other third-party contractors as well as
through other security measures. The confidentiality and intellectual property provisions of our agreements and
security measures may be breached, and we may not have adequate remedies for any such breach. In addition, our
trade secrets may otherwise become known or be independently developed by competitors.

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RISKS RELATING TO MANUFACTURING AND SALES

We will depend on collaborators and third-party manufacturers to produce most, if not all, of our
products under development, and if these third parties do not successfully formulate or manufacture these
products, our business will be harmed.

We have no manufacturing experience or manufacturing capabilities. In order to continue to develop drug
candidates, apply for regulatory approvals, and commercialize our products under development, we or any
collaborators must be able to manufacture products in adequate clinical and commercial quantities, in compliance
with regulatory requirements, including those related to quality control and quality assurance, at acceptable costs
and in a timely manner. The manufacture of our drug candidates may be complex, difficult to accomplish and
difficult to scale-up when large-scale production is required. Manufacture may be subject to delays, inefficiencies
and poor or low yields of quality products. The cost of manufacturing some of our products may make them
prohibitively expensive. If supplies of any of our drug candidates or related materials become unavailable or are
not delivered on a timely basis or at all, or are contaminated or otherwise lost, certain preclinical studies and/or
clinical trials by us and any collaborators could be seriously delayed. This is due to the fact that such materials
are time-consuming to manufacture and cannot be readily obtained from third-party sources.

To the extent that we or any collaborators seek to enter into manufacturing arrangements with third parties,
we and such collaborators will depend upon these third parties to perform their obligations in a timely and
effective manner and in accordance with government regulations. Contract manufacturers may breach their
to renew a
manufacturing agreements because of factors beyond our control or may terminate or fail
manufacturing agreement based on their own business priorities at a time that is costly or inconvenient for us.

Any contract manufacturers with which we enter into manufacturing arrangements will be subject to
ongoing periodic, unannounced inspection by the FDA and corresponding state and foreign agencies or their
designees to ensure strict compliance with current good manufacturing practices and other governmental
regulations and corresponding foreign standards. Any failure by our contract manufacturers, any collaborators or
us to comply with applicable regulations could result in sanctions being imposed, including fines, injunctions,
civil penalties, failure of regulatory authorities to grant marketing approval of our drug candidates, delays,
suspension or withdrawal of approvals, seizures or recalls of drug candidates, operating restrictions and criminal
prosecutions, any of which could significantly and adversely affect our business. If we need to change
manufacturers, the FDA and corresponding foreign regulatory agencies must approve any new manufacturers in
advance. This would involve testing and pre-approval inspections to ensure compliance with FDA and foreign
regulations and standards.

If third-party manufacturers fail to perform their obligations, our competitive position and ability to generate

revenue may be adversely affected in a number of ways, including;

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•

•

we and any collaborators may not be able to initiate or continue certain preclinical and/or clinical trials
of products that are under development;

we and any collaborators may be delayed in submitting applications for regulatory approvals for our
drug candidates; and

we and any collaborators may not be able to meet commercial demands for any approved products.

We have no sales or marketing experience and, as such, will depend significantly on third parties who may
not successfully sell our products.

We have no sales, marketing or product distribution experience. If we receive required regulatory approvals,
we plan to rely primarily on sales, marketing and distribution arrangements with third parties, including our
collaborative partners. For example, as part of our agreements with Genentech, we have granted Genentech the
exclusive rights to distribute certain products resulting from such collaborations, if any are ever successfully

29

developed. We may have to enter into additional marketing arrangements in the future and we may not be able to
enter into these additional arrangements on terms that are favorable to us, if at all. In addition, we may have
limited or no control over the sales, marketing and distribution activities of these third parties and sales through
these third parties could be less profitable to us than direct sales. These third parties could sell competing
products and may devote insufficient sales efforts to our products. Our future revenues will be materially
dependent upon the success of the efforts of these third parties.

We may seek to independently market products that are not already subject to marketing agreements with
other parties. If we determine to perform sales, marketing and distribution functions ourselves, we could face a
number of additional risks, including:

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•

•

we may not be able to attract and build a significant and skilled marketing staff or sales force;

the cost of establishing a marketing staff or sales force may not be justifiable in light of the revenues
generated by any particular product; and

our direct sales and marketing efforts may not be successful.

Even if we successfully commercialize any products under development, either alone or in collaboration,
we face uncertainty with respect to coverage, pricing, third-party reimbursements and healthcare reform,
all of which could affect our future profitability.

Our ability to collect significant royalties from our products may depend on our ability, and the ability of
any current or potential future collaboration partners or customers, to obtain adequate levels of coverage for our
products and reimbursement from third-party payers such as:

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government health administration authorities;

private health insurers;

health maintenance organizations;

pharmacy benefit management companies; and

other healthcare-related organizations.

Third-party payers may deny coverage or offer inadequate levels of reimbursement if they determine that a
prescribed product has not received appropriate clearances from the FDA or other government regulators, is not
used in accordance with cost-effective treatment methods as determined by the third-party payer, or is
experimental, unnecessary or inappropriate. If third-party payers deny coverage or offer inadequate levels of
reimbursement, we or any collaborators may not be able to market our products effectively. We also face the risk
that we will have to offer our products at prices lower than anticipated as a result of the current trend in the
United States towards managed healthcare through health maintenance organizations. Currently, third-party
payers are increasingly challenging the prices charged for medical products and services. Prices could be driven
down by health maintenance organizations that control or significantly influence purchases of healthcare services
and products. Existing U.S. laws, such as the Medicare Prescription Drug, Improvement, and Modernization Act
of 2003, or future legislation to reform healthcare or reduce government insurance programs could also adversely
affect prices of our approved products, if any. The cost-containment measures that healthcare providers are
instituting and the results of potential healthcare reforms may prevent us from maintaining prices for our
products that are sufficient for us to realize profits and may otherwise significantly harm our business, financial
condition and operating results. In addition, to the extent that our products are marketed outside of the United
States, foreign government pricing controls and other regulations may prevent us from maintaining prices for our
products that are sufficient for us to realize profits and may otherwise significantly harm our business, financial
condition and operating results.

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Recent proposed legislation may permit re-importation of drugs from foreign countries into the United
States, including foreign countries where the drugs are sold at lower prices than in the United States,
which could force us to lower the prices at which we sell our products, if approved, and impair our ability
to derive revenue from these products.

Legislation has been introduced in the U.S. Congress that, if enacted, would permit more widespread
re-importation of drugs from foreign countries into the United States. This could include re-importation from
foreign countries where the drugs are sold at lower prices than in the United States. Such legislation, or similar
regulatory changes, could lead to a decrease in the price we receive for any approved products, which, in turn,
could impair our ability to generate revenue. Alternatively, in response to legislation such as this, we might elect
not to seek approval for or market our products in foreign jurisdictions in order to minimize the risk of
re-importation, which could also reduce the revenue we generate from our product sales.

RISKS RELATED TO OUR COMMON STOCK

If we fail to meet the requirements for continued listing on the NASDAQ Global Market, our common
stock could be delisted from trading, which would adversely affect the liquidity of our common stock and
our ability to raise additional capital.

Our common stock is currently listed for quotation on the NASDAQ Global Market. We are required to
meet specified financial requirements in order to maintain our listing on the NASDAQ Global Market. One such
requirement is that we maintain a minimum closing bid price of at least $1.00 per share for our common stock.
Our common stock has recently closed at prices that are below the minimum bid price requirement. If our stock
price falls below $1.00 per share for 30 consecutive business days, we will receive a deficiency notice from
NASDAQ advising us that we have 180 days to regain compliance by maintaining a minimum bid price of at
least $1.00 for a minimum of ten consecutive business days. Under certain circumstances, NASDAQ could
require that the minimum bid price exceed $1.00 for more than ten consecutive days before determining that a
company complies with its continued listing standards. Given the continued extraordinary market conditions,
however, NASDAQ has suspended the rules requiring a minimum $1.00 closing bid price of publicly held shares.
Enforcement of these rules is scheduled to resume on Monday, April 20, 2009. If in the future we fail to satisfy
the NASDAQ Global Market’s continued listing requirements, our common stock could be delisted from the
NASDAQ Global Market, in which case we may transfer to the NASDAQ Capital Market, which generally has
lower financial requirements for initial listing or, if we fail to meet its listing requirements, the OTC Bulletin
Board. Any potential delisting of our common stock from the NASDAQ Global Market would make it more
difficult for our stockholders to sell our stock in the public market and would likely result in decreased liquidity
and increased volatility for our common stock.

Our stock price may fluctuate significantly and the market price of our common stock could drop below
the price paid.

The trading price of our common stock has been volatile and may continue to be volatile in the future. For
example, our stock has traded as high as $2.35 and as low as $0.68 per share for the period January 1, 2007
through February 20, 2009. The stock market, particularly in recent years, has experienced significant volatility
with respect
to pharmaceutical- and biotechnology-based company stocks. Prices for our stock will be
determined in the marketplace and may be influenced by many factors, including:

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announcements regarding new technologies by us or our competitors;

market conditions in the biotechnology and pharmaceutical sectors;

rumors relating to us or our competitors;

litigation or public concern about the safety of our potential products;

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actual or anticipated variations in our quarterly operating results and any subsequent restatement of
such results;

actual or anticipated changes to our research and development plans;

deviations in our operating results from the estimates of securities analysts;

entering into new collaboration agreements or termination of existing collaboration agreements;

adverse results or delays in clinical trials being conducted by us or any collaborators;

any intellectual property or other lawsuits involving us;

third-party sales of large blocks of our common stock;

sales of our common stock by our executive officers, directors or significant stockholders;

equity sales by us of our common stock to fund our operations;

the loss of any of our key scientific or management personnel;

FDA or international regulatory actions; and

general economic and market conditions, including recent adverse changes in the domestic and
international financial markets.

While we cannot predict the individual effect that these factors may have on the price of our common stock,
these factors, either individually or in the aggregate, could result in significant variations in price during any
given period of time. Moreover, in the past, securities class action litigation has often been instituted against
companies following periods of volatility in their stock price. This type of litigation could result in substantial
costs and divert our management’s attention and resources.

The limited liquidity for our common stock could affect an investor’s ability to sell our shares at a
satisfactory price and makes the trading price of our common stock more volatile.

Our common stock is relatively illiquid. As of December 31, 2008, we had approximately 63.7 million
shares of common stock outstanding. The average daily trading volume in the common stock during the prior 50
trading days ending on December 31, 2008 was 120,000 shares. A more active public market for our common
stock, however, may not develop, which would continue to adversely affect the trading price and liquidity of the
common stock. Moreover, a thin trading market for the common stock causes the market price for the common
stock to fluctuate significantly more than the stock market as a whole. Without a large float, our common stock is
less liquid than the stock of companies with broader public ownership and, as a result, the trading prices of our
common stock may be more volatile.

Future sales of shares of our common stock, including upon the exercise of currently outstanding options
and warrants or pursuant to our universal shelf registration statement could negatively affect our stock
price.

Most of our outstanding common stock can be traded without restriction at any time. As such, sales of a
substantial number of shares of our common stock in the public market could occur at any time. These sales, or
the perception in the market that the holders of a large number of shares intend to sell such shares, could reduce
the market price of our common stock. In addition, we have a significant number of shares that are subject to
outstanding options and warrants. The exercise of these options and warrants and the subsequent sale of the
underlying common stock could cause a further decline in our stock price. These sales also might make it
difficult for us to sell equity securities in the future at a time and at a price that we deem appropriate.

We currently have the ability to offer and sell common stock, preferred stock and warrants under a currently
effective universal shelf registration statement. Sales of substantial amounts of shares of our common stock or

32

other securities under our universal shelf registration statement could lower the market price of our common
stock and impair our ability to raise capital through the sale of equity securities. In the future, we may issue
additional options, warrants or other derivative securities convertible into our common stock.

We do not intend to pay dividends on our common stock, and any return to investors will come, if at all,
only from potential increases in the price of our common stock.

At the present time, we intend to use available funds to finance our operations. Accordingly, while payment
of dividends rests within the discretion of our board of directors, no common stock dividends have been declared
or paid by us and we have no intention of paying any common stock dividends in the foreseeable future.

Insiders have substantial control over us and could delay or prevent a change in corporate control.

As of December 31, 2008, we believe that our directors, executive officers and principal stockholders,
together with their affiliates, owned, in the aggregate, approximately 39% of our outstanding common stock. As
a result, these stockholders, if acting together, may have the ability to determine the outcome of matters
submitted to our stockholders for approval, including the election and removal of directors and any merger,
consolidation or sale of all or substantially all of our assets. In addition, these persons, if acting together, will
have the ability to control the management and affairs of our company. Accordingly, this concentration of
ownership may harm the market price of our common stock by:

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•

delaying, deferring or preventing a change in control of our company;

impeding a merger, consolidation, takeover or other business combination involving our company; or

discouraging a potential acquirer from making a tender offer or otherwise attempting to obtain control
of our company.

We have anti-takeover defenses that could delay or prevent an acquisition that our stockholders may
consider favorable and the market price of our common stock may be lower as a result.

Provisions of our certificate of incorporation, our bylaws and Delaware law may have the effect of deterring
unsolicited takeovers or delaying or preventing changes in control of our management, including transactions in
which our stockholders might otherwise receive a premium for their shares over then current market prices. In
addition, these provisions may limit the ability of stockholders to approve transactions that they may deem to be
in their best interest. For example, we have divided our board of directors into three classes that serve staggered
three-year terms, we may issue shares of our authorized “blank check” preferred stock and our stockholders are
limited in their ability to call special stockholder meetings.

In addition, we are subject to the anti-takeover provisions of Section 203 of the Delaware General
Corporation Law, which prohibits a publicly-held Delaware corporation from engaging in a business
combination with an interested stockholder, generally a person which together with its affiliates owns, or within
the last three years has owned, 15% of our voting stock, for a period of three years after the date of the
transaction in which the person became an interested stockholder, unless the business combination is approved in
a prescribed manner. These provisions could discourage, delay or prevent a change in control transaction.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 2.

PROPERTIES

We currently lease a facility for our administrative, research and development requirements located at 45
Moulton Street in Cambridge, Massachusetts consisting of 35,095 square feet pursuant to a lease that expires in

33

2010. We also have the right to extend our lease term for two additional terms of three years each, with the first
such additional term commencing as of January 1, 2011 and expiring as of December 31, 2013 and the second
such additional term commencing as of January 1, 2014 and expiring as of December 31, 2016. We believe that
our existing facilities will be suitable and adequate to meet our needs for the foreseeable future.

ITEM 3.

LEGAL PROCEEDINGS

We are currently not a party to any material legal proceedings.

ITEM 4.

SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

We did not submit any matter to a vote of security holders during the fourth quarter of the fiscal year

covered by this annual report.

EXECUTIVE OFFICERS OF THE REGISTRANT

Our executive officers are as follows:

Name

Age

Position

Daniel R. Passeri, MSc., J.D.

. . . .

Michael P. Gray . . . . . . . . . . . . . . .

Mark W. Noel . . . . . . . . . . . . . . . . .

48

38

50

President and Chief Executive Officer

Chief Operating Officer and Chief Financial Officer

Vice President, Technology Management and Intellectual
Property

Changgeng Qian, Ph.D., M.D.

. . .

53

Vice President, Discovery and Preclinical Research

Daniel R. Passeri, MSc., J.D.

. . . . Mr. Passeri has served as our President and Chief Executive
Officer and as a director since September 2001. From
November 2000 to September 2001, Mr. Passeri served as
Senior Vice President, Corporate Development and Strategic
Planning of the Company. From March 1997 to November
2000, Mr. Passeri was employed by GeneLogic Inc., a
biotechnology company, most
recently as Senior Vice
President, Corporate Development and Strategic Planning.
From February 1995 to March 1997, Mr. Passeri was employed
by Boehringer Mannheim, a pharmaceutical, biotechnology and
diagnostic company, as Director of Technology Management.
Mr. Passeri is a graduate of the National Law Center at George
Washington University, with a J.D., of the Imperial College of
Science, Technology and Medicine at
the University of
London, with an M.Sc. in biotechnology, and of Northeastern
University, with a B.S. in biology.

Michael P. Gray . . . . . . . . . . . . . . . Mr. Gray has served as our Chief Operating Officer and Chief
Financial Officer since December 2006. From December 2003
until December 2006, Mr. Gray served as our Vice President of
Finance and Chief Financial Officer and served as our Senior
Director of Finance and Controller from August 2000 until
December 2003. From January 1998 to July 2000, Mr. Gray was
Controller at Reprogenesis, Inc., a predecessor biotechnology
company. Mr. Gray previously served as an audit professional
for the accounting and consulting firm of Ernst & Young, LLP.
Mr. Gray is a certified public accountant, holds an M.B.A. from
the F.W. Olin Graduate School of Business at Babson College,
and has a B.S. in accounting from Bryant College.

34

Mark W. Noel . . . . . . . . . . . . . . . . . Mr. Noel has served as our Vice President, Technology
Management and Intellectual Property since September 2008.
From March 2001 until September 2008, Mr. Noel has served
as our Vice President, Technology Management and Business
Development. From March 2000 to February 2001, Mr. Noel
was employed by GeneLogic, as Vice President of Customer
Relations. From January 1998 to February 2000, Mr. Noel was
employed by GeneLogic as Senior Director of Program
Management. From December 1993 to January 1998, Mr. Noel
was employed by the National Cancer Institute’s Office of
Technology Development (now the NCI Technology Transfer
Center), where from July 1997 to January 1998, he served as
Acting Deputy Director. From February 1989 to November
1993, Mr. Noel worked as a patent agent at Gist Brocades NV,
a supplier of ingredients to the pharmaceutical and food
sectors. Mr. Noel holds a B.S.
from the University of
Maryland.

Changgeng Qian, Ph.D., M.D.

. . .

served

Dr. Qian has served as our Vice President, Discovery and
Preclinical Research since September 2006. From May 2005 to
September 2006, Dr. Qian served as our Senior Director,
Pharmacology. From May 2002 to May 2005, Dr. Qian served
as our Director, Pharmacology, and from May 2001 to May
2002, Dr. Qian
our Associate Director,
as
Pharmacology. From November 1999 to May 2001, Dr. Qian
was Senior Scientist II at Millennium Pharmaceuticals, Inc., a
biopharmaceutical company. From October 1996 to November
1999, Dr. Qian was Senior Research Scientist III at LeukoSite,
Inc., a biopharmaceutical company that was acquired by
Millennium Pharmaceuticals in December 1999. From January
1992 to December 1995, Dr. Qian was Head of Pharmacology
at CytoMed, Inc., a biopharmaceutical company. Dr. Qian
holds a Ph.D. in Pharmacology and an M.D. from the Hunan
Medical University in Changsha, China and has served as a
professor of the Hunan Medical University since 1992.

35

PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY AND RELATED STOCKHOLDERS

MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

(a) Market Information. Our common stock is traded on the NASDAQ Global Market under the trading
symbol “CRIS.” The following table sets forth, for the fiscal periods indicated, the high and low sales prices per
share of our common stock as reported on the NASDAQ Global Market:

Year ended December 31, 2007

First Quarter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year ended December 31, 2008

First Quarter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Curis
Common Stock

High

Low

$1.72
$2.35
$1.31
$1.20

$1.63
$1.58
$1.94
$1.21

$1.15
$1.13
$0.93
$0.86

$0.91
$1.13
$1.08
$0.68

(b) Holders. On February 24, 2009, the last reported sale price of our common stock on the NASDAQ
Global Market was $1.26 and there were 301 holders of record of our common stock. The number of record
holders may not be representative of the number of beneficial owners because many of the shares of our common
stock are held by depositories, brokers or other nominees.

(c) Dividends. We have never declared or paid any cash dividends on our common stock. We currently
intend to retain earnings, if any, to support our business strategy and do not anticipate paying cash dividends in
the foreseeable future. Payment of future dividends, if any, will be at the sole discretion of our board of directors
after taking into account various factors, including our financial condition, operating results, capital requirements
and any plans for expansion.

(e) Performance Graph. The graph below compares the cumulative total stockholder return on the
common stock for the period from December 31, 2003 through December 31, 2008, with the cumulative total
return on (i) NASDAQ Pharmaceutical Index, (ii) NASDAQ Market Index—U.S. Companies and (iii) NASDAQ
Biotechnology Index. The comparison assumes investment of $100 on December 31, 2003 in our common stock
and in each of the indices and, in each case, assumes reinvestment of all dividends. Prior to August 1, 2000, our
common stock was not publicly traded.

36

175

150

125

100

75

50

25

0
2003

2004

2005

2006

2007

2008

CURIS INCORPORATED

NASDAQ PHARMACEUTICAL INDEX

NASDAQ MARKET INDEX-U.S. COS.

NASDAQ BIOTECHNOLOGY INDEX

CURIS INCORPORATED . . . . . . . . . . . . . . . . . . . . . . .
NASDAQ PHARMACEUTICAL INDEX . . . . . . . . . . .
NASDAQ MARKET INDEX-U.S. COS.
. . . . . . . . . . .
NASDAQ BIOTECHNOLOGY INDEX . . . . . . . . . . . .

100.00
100.00
100.00
100.00

116.00
108.08
109.04
112.31

79.11
119.19
112.97
131.52

28.00
119.53
126.73
130.42

21.78
116.69
138.98
129.36

16.67
106.89
81.17
122.91

12/31/03

12/31/04

12/31/05

12/31/06

12/31/07

12/31/08

37

ITEM 6.

SELECTED FINANCIAL DATA

The selected consolidated financial data set forth below have been derived from our consolidated financial
statements. These historical results are not necessarily indicative of results to be expected for any future period.
You should read the data set forth below in conjunction with “Management’s Discussion and Analysis of
Financial Condition and Results of Operations” and the consolidated financial statements and related notes
included elsewhere in this report.

Consolidated Statement of Operations Data:
Revenues:

Research and development contracts . . . . . . . . . . . . . . . . . . . $
License and maintenance fees(1) . . . . . . . . . . . . . . . . . . . . . .
Substantive milestones(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contra-revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Costs and expenses:

Research and development . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and administrative . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amortization of intangible assets . . . . . . . . . . . . . . . . . . . . . .

Total costs and expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,

2008

2007

2006

2005

2004

(in thousands, except per share data)

514 $

7,853
—
—

8,367

13,226
8,260
—

21,486

3,262 $
13,127
—
—

9,340 $ 10,493 $
4,324
3,000
(1,728)

2,258
250
(6,999)

16,389

14,936

6,002

14,779
9,984
—

24,763

14,590
10,374
27

24,991

13,705
8,090
75

21,870

3,407
242
50
—

3,699

12,662
7,757
75

20,494

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

(13,119)

(8,374)

(10,055)

(15,868)

(16,795)

Other income (expense):

Interest and other income . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total other income, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,000
(4)

996

1,495
(85)

1,410

1,422
(196)

1,226

1,321
(308)

1,013

2,131
(411)

1,720

Net loss applicable to common stockholders . . . . . . . . . . . . . . . . . $ (12,123) $

(6,964) $

(8,829) $ (14,855) $ (15,075)

Basic and diluted net loss per common share . . . . . . . . . . . . . . . . . $

(0.19) $

(0.13) $

(0.18) $

(0.31) $

(0.35)

Weighted average common shares (basic and diluted)

. . . . . . . . .

63,378

54,915

49,067

48,074

42,686

(in thousands)
As of December 31,

2008

2007

2006

2005

2004

Consolidated Balance Sheet Data:
Cash, cash equivalents and marketable securities . . . . . . . . . . . . . $ 28,853 $ 41,459 $ 36,656 $ 44,209 $ 49,514
46,854
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Working capital
193
Long-term investment—restricted . . . . . . . . . . . . . . . . . . . . . . . . .
67,332
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
—
Debt and lease obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5,710
Convertible notes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(665,199)
Accumulated deficit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
48,312
Total stockholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36,010
196
60,914
3,227
2,605
(680,054)
38,000

26,748
210
39,982
—
—
(707,971)
37,225

32,521
202
52,268
1,980
—
(688,883)
35,897

35,410
210
53,817
404
—
(695,848)
46,845

(1) During the year ended December 31, 2008, we recognized $6,000,000 of revenue for contingent cash payments that we
received during 2008 under our June 2003 Hedgehog pathway inhibitor collaboration with Genentech. During the year
ended December 31, 2007, we recognized $10,509,000 of revenue under this collaboration, which included $7,509,000
in previously deferred revenue and $3,000,000 for a contingent cash payment that we received during 2007.

(2) During the year ended December 31, 2006, we recognized $3,000,000 as substantive milestone revenue under our June
2003 Hedgehog pathway inhibitor collaboration with Genentech. In 2005, we recognized $250,000 under our January
2004 Hedgehog agonist collaboration with Wyeth.

38

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

The following discussion and analysis of financial condition and results of operations should be read
together with “Selected Financial Data,” and our financial statements and accompanying notes appearing
elsewhere in this annual report on Form 10-K. This discussion contains forward-looking statements, based on
current expectations and related to future events and our future financial performance, that involve risks and
uncertainties. Our actual results may differ materially from those anticipated in these forward-looking
statements as a result of many important factors, including those set forth under Item 1A, “Risk Factors” and
elsewhere in this report.

Overview

We are a drug discovery and development company that is committed to leveraging our innovative signaling
pathway drug technologies in seeking to develop next generation targeted cancer therapies. In expanding our
drug development efforts with respect to these targeted cancer programs, we are building upon our past
experiences in targeting signaling pathways, including the Hedgehog pathway. We seek to conduct research
programs both internally and through strategic collaborations.

Our most advanced program is a first-in-class orally administered Hedgehog pathway inhibitor program for
which our collaborator Genentech is conducting clinical trials on the lead molecule, GDC-0449, including a
pivotal Phase II clinical trial in advanced basal cell carcinoma patients as well as Phase II clinical trials in first-
line metastatic colorectal cancer and in advanced ovarian cancer patients. We believe that GDC-0449 is the first
Hedgehog pathway inhibitor to advance to Phase II clinical testing. The initiation of these clinical trials has
provided us with an important source of financing, resulting in a total of $18,000,000, including the $6,000,000
we will receive in the first quarter of 2009 for the initiation of the pivotal Phase II trial. In addition to these three
clinical trials, a Phase I clinical trial to treat medulloblastoma patients was initiated by a third-party investigator
under a Cooperative Research and Development Agreement (CRADA) between Genentech and the National
Cancer Institute (NCI). We anticipate that additional clinical trials will be initiated in the future including Phase
II clinical trials in small cell lung and pancreatic cancers, among others. The initiation of trials conducted under
the CRADA do not result in cash payments to us. We believe, however, that such trials are important to the
overall development of GDC-0449 since they may provide a greater opportunity to generate additional data in
tumor types other than those currently under investigation by Genentech.

Our internal drug development efforts are focused on our proprietary targeted cancer programs. However,
unlike the Hedgehog pathway, a majority of these targeted pathways have been clinically validated by others in
various cancer indications. By directing our efforts toward validated targets, we believe that we can expedite the
drug development process by taking advantage of the accumulated scientific knowledge base relating to these
targets and the molecules that have been developed to act on them. These targeted cancer programs primarily
consist of several proprietary drug programs that target multiple signaling pathways. We believe that this
approach of targeting multiple nodes in various signaling pathway networks may provide for a better therapeutic
effect than many of the targeted cancer drugs currently marketed or in development. Our lead candidate from
these programs is CUDC-101, a small molecule that is currently in Phase I clinical testing and is designed to
target histone deacetylase (HDAC), epidermal growth factor receptor (EGFR) and epidermal growth factor 2
(Her2). In addition, we expect to file an Investigational Drug Application (IND) for CUDC-305, a Heat Shock
Protein 90 (Hsp90) inhibitor, in mid-2009 and provided that we have adequate capital resources, begin clinical
testing on this candidate shortly thereafter.

Since our inception, we have funded our operations primarily through license fees, contingent cash
payments, research and development funding from our strategic collaborators, the private and public placement
of our equity securities and debt financings and the monetization of certain royalty rights. We have never been
profitable and have incurred an accumulated deficit of $707,971,000 as of December 31, 2008. We expect to
incur significant operating losses for the next several years as we devote substantially all of our resources to our

39

research and development programs. We will need to generate significant revenues to achieve profitability and
do not expect to achieve profitability in the foreseeable future, if at all. We believe that near term key drivers to
our success will include:

•

•

•

•

•

Genentech’s ability to continue to successfully advance its clinical trials for GDC-0449;

our ability to successfully enter into a material license or collaboration agreement for CUDC-305 and/
or CUDC-101;

our ability to continue to successfully enroll and treat patients in our phase I clinical trial for
CUDC-101 and achieve the primary and secondary endpoints of the trial;

our ability to successfully advance CUDC-305 through preclinical IND-enabling studies and file an
IND application for this compound in 2009; and

our ability to advance the preclinical development of other small molecule cancer drug candidates that
we are developing under our proprietary pipeline of targeted cancer programs.

In the longer term, a key driver to our success will be our ability, and the ability of any current or future

collaborator or licensee, to successfully commercialize drugs based upon our proprietary technologies.

Collaboration Agreements

We are currently a party to a June 2003 collaboration with Genentech relating to our Hedgehog pathway
inhibitor technologies and to an April 2005 collaboration with Genentech relating to the Wnt signaling pathway.
Our past and current collaborations have generally provided for research, development and commercialization
programs to be wholly or majority funded by our collaborators and provide us with the opportunity to receive
additional contingent cash payments principally if specified development and regulatory approval objectives are
achieved, as well as royalty payments upon the successful commercialization of any products based upon the
collaborations. We are currently not receiving any research funding and we do not expect to receive such funding
in the future from our current collaborator, Genentech. We currently expect to incur only nominal research and
development costs under these collaborations related to the maintenance of licenses. In addition, as a result of our
licensing agreements with various universities, we are obligated to make payments to these university licensors
when we receive certain payments from Genentech. As of December 31, 2008, we have incurred an aggregate of
$600,000 in expenses related to such payments. We also expect to incur general and administrative costs
associated with our Hedgehog pathway inhibitor program related to our share of intellectual property costs.

Our current collaboration agreements are summarized as follows:

Genentech Hedgehog Pathway Inhibitor Collaboration. Under the terms of the June 2003 agreement with
Genentech, we granted Genentech an exclusive, global, royalty-bearing license, with the right to sublicense,
make, use, sell and import small molecule and antibody Hedgehog pathway inhibitors. We had responsibilities to
perform certain funded preclinical research activities and, from January 2005 through August 2006, co-funded
clinical development costs for certain products. In November 2008, Genentech granted a license to F. Hoffmann-
LaRoche, Ltd (Roche) for ex-U.S. rights to GDC-0449. Roche received this license pursuant to an agreement
between Genentech and Roche under which Genentech granted Roche an option to obtain a license to
commercialize certain Genentech products in non-U.S. markets. We believe that the collaborative worldwide
development activities of Genentech and Roche could expand the potential value of this compound since Roche
brings significant additional clinical development and commercialization experience to advance and market
GDC-0449 outside of the U.S. Genentech and Roche have primary responsibility for worldwide clinical
development, regulatory affairs, manufacturing and supply, formulation and sales and marketing. We are not a
party to this agreement between Genentech and Roche but we are eligible to receive cash payments for regulatory
filing and approval objectives achieved and future royalties on products developed outside of the U.S., if any,
under our June 2003 collaboration agreement with Genentech.

40

Pursuant to the collaboration agreement, in June 2003 Genentech made up-front payments of $8,500,000,
which consisted of a $3,509,000 non-refundable license fee payment and a payment of $4,991,000 in exchange
for 1,323,835 shares of our common stock. Genentech also made license maintenance fee payments totaling
$4,000,000 over the first two years of the collaboration. We have entered into three amendments to the June 2003
collaboration agreement. Pursuant to the amendments, Genentech increased its funded research commitment and
extended its funding obligation through December 2006. As part of these amendments, Genentech provided us
with $5,846,000 in incremental research funding over the period from December 2004 to December 2006 at
which time, all research funding ended. We do not expect to receive additional future research funding from
Genentech or incur any material research costs related to this program. To date, we have received $12,000,000 in
cash payments for the achievement of certain development objectives under the terms of the agreement, and we
will receive an additional $6,000,000 during the first quarter of 2009 for the February 2009 initiation of the
pivotal Phase II clinical trial in advanced basal cell carcinoma. In addition to these payments, we will be eligible
to receive additional future cash payments from Genentech only upon the achievement of additional specified
clinical development and regulatory approval objectives as well as royalties on product sales if any Hedgehog
pathway inhibitor products are successfully developed and commercialized.

Genentech Wnt Pathway Collaboration.

In April 2005, we entered into a collaboration agreement with
Genentech for discovery and development of small molecule compounds that modulate the Wnt signaling
pathway. Under the terms of the agreement, we granted Genentech an exclusive royalty-bearing license to make,
use and sell the small molecule compounds that are modulators of the Wnt pathway. Genentech paid us an
up-front license fee of $3,000,000 and funded $5,270,000 for research and development activities during the
two-year research term, which ended in March 2007, at which time, Genentech assumed further responsibility for
any future development of this program. Genentech has also agreed to make cash payments to us that are
contingent upon the successful achievement of certain research, development, clinical and drug approval
objectives, as well as royalties on net product sales if product candidates derived from the collaboration are
successfully commercialized. If Genentech does not advance drug candidates generated under this collaboration
beyond the discovery research stage, we are not entitled to receive any future cash payments under this
collaboration. We can not predict whether Genentech will continue to pursue the development of drug candidates
under the agreement or whether any development objectives for which we may be entitled to a cash payment will
be achieved.

Stryker Corporation BMP Assignment and Sale

In December 2007, we sold and assigned our bone morphogenetic protein, or BMP, technologies to Stryker
Corporation. Under the agreement, Stryker paid us $1,750,000 in exchange for the sale and assignment of all of
our remaining BMP assets. As a result of the transaction, Stryker assumed all future costs subsequent to the
December 26, 2007 effective date related to future development activities, as well as to the maintenance and
prosecution of the patent portfolio. Under the terms of the agreements, we are entitled to contingent cash
payments related to certain clinical development and sales objectives, if achieved. We can not predict whether
any development objectives under this agreement for which we may be entitled to a contingent cash payment will
be achieved.

Financial Operations Overview

General. Our future operating results will largely depend on the magnitude of payments from our current
and potential future corporate collaborators and the progress of drug candidates currently in our research and
development pipeline. The results of our operations will vary significantly from year to year and quarter to
quarter and depend on, among other factors, the timing of our entry into new collaborations, if any, the timing of
the receipt of payments, if any, from new or existing collaborators and the cost and outcome of any preclinical
development or clinical trials then being conducted. We anticipate that existing capital resources at December 31,
2008, together with the $6,000,000 we have earned and will receive from Genentech during the first quarter of
2009 for the February 2009 initiation of a pivotal phase II clinical trial in advanced basal cell carcinoma, should

41

enable us to maintain current and planned operations into mid-2010. Our ability to continue funding our planned
operations is dependent upon the success of our collaborations with Genentech, our ability to control our cash
burn rate and our ability to raise additional funds through additional corporate collaborations, equity or debt
financings, or from other sources of financing.

In October 2008, we implemented a plan to reduce our spending in various general and administrative and
research and development expense areas, particularly costs associated with preclinical research. Spending
reductions include decreases in contract medicinal chemistry and biology work that was being performed in
China, and in personnel, legal and occupancy costs. As we seek to reduce administrative expenses and our
preclinical and discovery research costs, we expect that our expenses associated with the clinical development of
CUDC-101 and the IND-enabling studies underway for CUDC-305 will increase, resulting in an overall increase
in our research and development expenses for future periods as compared to prior years. We expect that our
reductions in general and administrative expenses will result in modest decreases in such expenses in future
periods.

A discussion of certain risks and uncertainties that could affect our liquidity, capital requirements and ability

to raise additional funds is set forth under “Part I, Item 1A—Risk Factors.”

Revenue. We do not expect to generate any revenue from the sale of products for several years, if ever.
Substantially all of our gross revenues to date have been derived from license fees, research and development
payments, and other amounts that we have received from our strategic collaborators and licensees. For the year
ended December 31, 2008, each of the following parties accounted for a portion of our total revenue as follows:
Genentech, $6,282,000, or 75%; Stryker Corporation, $1,750,000, or 21%; and Wyeth, $299,000, or 4%.

We currently have two collaborations, both of which are with Genentech. We currently receive no research
funding for our programs under collaboration with Genentech and we do not expect to receive such funding in
the future under these collaborations. Accordingly, our only source of revenues and/or cash flows from
operations for the foreseeable future will be up-front license payments and funded research and development that
we may receive under new collaboration agreements, if any, contingent cash payments for the achievement of
development objectives, if any are met, under new collaborations or our existing collaborations with Genentech
and royalty payments that are contingent upon the successful commercialization of any products based upon
collaborations. The timing of our entrance into any new collaboration agreements and any contingent cash
payments under our existing collaboration agreements with Genentech are not assured, cannot be easily predicted
and may vary significantly from quarter to quarter. Except for the $6,000,000 we will receive in the first quarter
of 2009 under our Hedgehog pathway inhibitor collaboration with Genentech, we do not expect to receive
additional contingent cash payments in 2009 under our ongoing collaborations based on our current estimates of
these development programs.

42

Research and Development. Research and development expense consists of costs incurred to discover,
research and develop our drug candidates. These expenses consist primarily of salaries and related expenses for
personnel including stock-based compensation expense. Research and development expenses also include the
costs of supplies and reagents, outside service costs including clinical research organizations and medicinal
chemistry, consulting, and occupancy and depreciation charges. We expense research and development costs as
incurred. Although we have historically incurred research and development expenses under our collaborations
with Genentech, we are currently incurring only nominal research and development expenses for these programs
which are limited to the maintenance of third-party licenses. For each contingent payment, if any, received under
our collaborations with Genentech, we would be obligated to make payments to these third parties and recognize
the related expense. Our research and development programs, both internal and under collaboration, are
summarized in the following table:

Product Candidate

Primary Indication

Collaborator/Licensee

Status

Hedgehog Pathway Inhibitor

- GDC-0449
- GDC-0449
- GDC-0449

Targeted cancer programs

Advanced basal cell carcinoma
Metastatic colorectal cancer
Advanced ovarian cancer

Genentech
Genentech
Genentech

Pivotal Phase II
Phase II
Phase II

- CUDC-101 (HDAC, EGFR,

Cancer

Internal development

Phase I

Her2 inhibitor)

- CUDC-305 (Hsp90 inhibitor)
- Other targeted cancer

Cancer
Cancer

programs

Internal development
Internal development

Development candidate
Preclinical

In the chart above, “Pivotal Phase II” means that our collaborator Genentech is currently treating human
patients in a pivotal Phase II clinical trial, the primary objective of which is a therapeutic response in human
patients. The endpoints of this clinical trial, if positive, may serve as the basis for future New Drug Application
(NDA) submission by Genentech. “Phase II” means that our collaborator Genentech is currently treating human
patients in a Phase II clinical trial, the primary objective of which is a therapeutic response (i.e., for the
metastatic colorectal cancer trial, progression-free survival from randomization to disease progression or death).
“Phase I” means that we are currently treating human patients in a Phase I clinical trial, the principal purpose of
which is to evaluate the safety and tolerability of the compound being tested. “Development candidate” means
that from our testing in several preclinical models of human disease of various compounds from a particular
compound class, we have selected a single lead candidate for potential future clinical development and are
seeking to complete the relevant safety, toxicology, and other data required to submit an IND application with
the FDA seeking to commence a Phase I clinical trial. “Preclinical” means we are seeking to obtain evidence of
therapeutic efficacy in preclinical models of human disease of one or more compounds within a particular class
of drug candidates.

Because of the early stages of development of these programs, our ability and that of our collaborator to
successfully complete preclinical and clinical studies of these drug candidates, and the timing of completion of
such programs, is highly uncertain. There are numerous risks and uncertainties associated with developing drugs
which may affect our and our collaborators’ future results, including:

•

•

•

•

•

•

the scope, quality of data, rate of progress and cost of clinical
development activities undertaken by us or our collaborators;

trials and other research and

the results of future preclinical and clinical trials;

the cost and timing of regulatory approvals;

the cost and timing of establishing sales, marketing and distribution capabilities;

the cost of establishing clinical and commercial supplies of our drug candidates and any products that
we may develop;

the effect of competing technological and market developments; and

43

•

the cost and effectiveness of filing, prosecuting, defending and enforcing any patent claims and other
intellectual property rights.

We cannot reasonably estimate or know the nature, timing and estimated costs of the efforts necessary to
complete the development of, or the period in which material net cash inflows are expected to commence from
any of our drug candidates. Any failure to complete the development of our drug candidates in a timely manner
could have a material adverse effect on our operations, financial position and liquidity.

A further discussion of some of the risks and uncertainties associated with completing our research and
development programs on schedule, or at all, and some consequences of failing to do so, are set forth above in
“Part I, Item 1A—Risk Factors.”

General and Administrative. General and administrative expense consists primarily of salaries, stock-
based compensation expense and other related costs for personnel in executive, finance, accounting, business
development, legal, information technology, corporate communications and human resource functions. Other
costs include facility costs not otherwise included in research and development expense,
insurance, and
professional fees for legal, patent and accounting services. Patent costs include certain patents covered under
collaborations, a portion of which is reimbursed by collaborators and a portion of which is borne by Curis. In
October 2008, we extended previously-initiated efforts to reduce our spending in various general and
administrative expense areas, including personnel, occupancy and legal services, among others. As a result of
these changes, we expect that our general and administration expenses will decline modestly in future periods.

Critical Accounting Policies and Estimates

The preparation of our consolidated financial statements in conformity with accounting principles generally
accepted in the United States requires that we make estimates and assumptions that affect the reported amounts
and disclosure of certain assets and liabilities at our balance sheet date. Such estimates and judgments include the
carrying value of property and equipment and intangible assets, revenue recognition, the value of certain
liabilities and stock-based compensation. We base our estimates on historical experience and on various other
factors that we believe to be appropriate under the circumstances, the results of which form the basis for making
judgments about the carrying value of assets and liabilities that are not readily apparent from other sources.
Actual results may differ from these estimates under different assumptions or conditions.

While our significant accounting policies are more fully described in our consolidated financial statements,
we believe that the following accounting policies are critical to understanding the judgments and estimates we
use in preparing our financial statements:

Revenue Recognition

Our business strategy includes entering into collaborative license and development agreements with
biotechnology and pharmaceutical companies for the development and commercialization of our product
candidates. The terms of the agreements typically include non-refundable license fees, funding of research and
development, payments based upon achievement of clinical development milestones and royalties on product
sales. We follow the provisions of the Securities and Exchange Commission’s Staff Accounting Bulletin, or
SAB, No. 104, Revenue Recognition, Emerging Issues Task Force, or EITF, Issue No. 00-21, Accounting for
Revenue Arrangements with Multiple Deliverables, EITF Issue No. 99-19, Reporting Revenue Gross as a
Principal Versus Net as an Agent, and EITF Issue No. 01-9, Accounting for Consideration Given by a Vendor to
a Customer (Including a Reseller of the Vendor’s Products).

License Fees and Multiple Element Arrangements. Non-refundable license fees are recognized as revenue
when we have a contractual right to receive such payment, the contract price is fixed or determinable, the
collection of the resulting receivable is reasonably assured and we have no further performance obligations under

44

the license agreement. Multiple element arrangements, such as license and development arrangements are
analyzed to determine whether the deliverables, which often include a license and performance obligations such
as research and steering committee services, can be separated or whether they must be accounted for as a single
unit of accounting in accordance with EITF 00-21. We recognize up-front license payments as revenue upon
delivery of the license only if the license has stand-alone value and the fair value of the undelivered performance
obligations, typically including research and/or steering committee services, can be determined. If the fair value
of the undelivered performance obligations can be determined, such obligations would then be accounted for
separately as performed. If the license is considered to either (i) not have stand-alone value or (ii) have
standalone value but the fair value of any of the undelivered performance obligations cannot be determined, the
arrangement would then be accounted for as a single unit of accounting and the license payments and payments
for performance obligations are recognized as revenue over the estimated period of when the performance
obligations are performed.

Whenever we determine that an arrangement should be accounted for as a single unit of accounting, we
must determine the period over which the performance obligations will be performed and revenue will be
recognized. Revenue will be recognized using either a relative performance or straight-line method. We
recognize revenue using the relative performance method provided that we can reasonably estimate the level of
effort required to complete our performance obligations under an arrangement and such performance obligations
are provided on a best-efforts basis. Direct labor hours or full-time equivalents are typically used as the measure
of performance. Revenue recognized under the relative performance method would be determined by multiplying
the total payments under the contract, excluding royalties and payments contingent upon achievement of
substantive milestones, by the ratio of level of effort incurred to date to estimated total level of effort required to
complete our 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 relative
performance method, as of each reporting period.

If we cannot reasonably estimate the level of effort required to complete our performance obligations under
an arrangement, the performance obligations are provided on a best-efforts basis and we can reasonably estimate
when the performance obligation ceases or becomes inconsequential,
then the total payments under the
arrangement, excluding royalties and payments contingent upon achievement of substantive milestones, would be
recognized as revenue on a straight-line basis over the period we expect
to complete our performance
obligations. Revenue is limited to the lesser of the cumulative amount of payments received or the cumulative
amount of revenue earned, as determined using the straight-line basis, as of the period ending date.

If we cannot reasonably estimate when our performance obligation either ceases or becomes inconsequential
and perfunctory, then revenue is deferred until we can reasonably estimate when the performance obligation
ceases or becomes inconsequential and perfunctory. Revenue is then recognized over the remaining estimated
period of performance.

judgment

Significant management

is required in determining the level of effort required under an
arrangement and the period over which we are expected to complete our performance obligations under an
arrangement. In addition, if we are involved in a steering committee as part of a multiple element arrangement
that is accounted for as a single unit of accounting, we assess whether our involvement constitutes a performance
obligation or a right to participate. Steering committee services that are not inconsequential or perfunctory and
that are determined to be performance obligations are combined with other research services or performance
obligations required under an arrangement, if any, in determining the level of effort required in an arrangement
and the period over which we expect to complete our aggregate performance obligations.

Substantive Milestone Payments. Our collaboration agreements may also contain substantive milestone
payments. Substantive milestone payments are considered to be performance bonuses that are recognized upon
achievement of the milestone only if all of the following conditions are met:

•

the milestone payments are non-refundable;

45

•

•

•

•

achievement of the milestone involves a degree of risk and was not reasonably assured at the inception
of the arrangement;

substantive effort on our part is involved in achieving the milestone;

the amount of the milestone payment is reasonable in relation to the effort expended or the risk
associated with achievement of the milestone; and,

a reasonable amount of time passes between the up-front license payment and the first milestone
payment as well as between each subsequent milestone payment.

Determination as to whether a payment meets the aforementioned conditions involves management’s
judgment. If any of these conditions are not met, the resulting payment would not be considered a substantive
milestone, and therefore the resulting payment would be considered part of the consideration for the single unit
of accounting and be recognized as revenue as such performance obligations are performed under either the
relative performance or straight-line methods, as applicable, and in accordance with these policies as described
above. In addition, the determination that one such payment was not a substantive milestone could prevent us
from concluding that subsequent milestone payments were substantive milestones and, as a result, any additional
milestone payments could also be considered part of the consideration for the single unit of accounting and
would be recognized as revenue as such performance obligations are performed under either the relative
performance or straight-line methods, as applicable.

Reimbursement of Costs. Reimbursement of costs is recognized as revenue provided the provisions of
EITF 99-19 are met, the amounts are determinable, and collection of the related receivable is reasonably assured.

Royalty Revenue. Royalty revenue is recognized upon the sale of the related products, provided that the
royalty amounts are fixed or determinable, collection of the related receivable is reasonably assured and we have
no remaining performance obligations under the arrangement. If royalties are received when we have remaining
performance obligations, the royalty payments would be attributed to the services being provided under the
arrangement and therefore would be recognized as such performance obligations are performed under either the
relative performance or straight line methods, as applicable, and in accordance with these policies as described
above. We did not recognize any royalty revenues for the years ended December 31, 2008, 2007 or 2006.

Payments from Curis as a Vendor to a Collaborator as a Customer. For revenue generating arrangements
where we, as a vendor, provide consideration to a licensor or collaborator, as a customer, we apply the provisions
of EITF 01-9. EITF 01-9 addresses the accounting for revenue arrangements where both the vendor and the
customer make cash payments to each other for services and/or products. A payment to a customer is presumed
to be a reduction of the selling price unless we receive an identifiable benefit for the payment and we can
reasonably estimate the fair value of the benefit received. Payments to a customer that are deemed a reduction of
selling price are recorded first as a reduction of revenue, to the extent of both cumulative revenue recorded
to-date and of probable future revenues, which include any unamortized deferred revenue balances, under all
arrangements with such customer and then as an expense. Payments that are not deemed to be a reduction of
selling price would be recorded as an expense.

Deferred Revenue. Amounts received prior to satisfying the above revenue recognition criteria are
recorded as deferred revenue in the accompanying consolidated balance sheets. Significant judgments are
required in the application of revenue recognition guidance. For example, in connection with our existing and
former collaboration agreements, we have historically recorded on our balance sheet short- and long-term
deferred revenue based on our best estimate of when such revenue would be recognized. Short-term deferred
revenue would consist of amounts that are expected to be recognized as revenue, or applied against future
co-development costs, within the next fiscal year. Amounts that we expect will not be recognized in the next
fiscal year would be classified as long-term deferred revenue. However, this estimate would be based on our
operating plan as of the balance sheet date and on our estimated performance periods under the collaboration in

46

which we have recorded deferred revenues. If our operating plan or our estimated performance period would
change, we could recognize a different amount of deferred revenue over the reporting period. As of
December 31, 2008, we had no remaining short- or long-term deferred revenue related to our collaborations.

The estimate of deferred revenue also reflects management’s estimate of the periods of our involvement in
certain of our collaborations. Our performance obligations under these collaborations have consisted of
participation on steering committees and the performance of other research and development services. In certain
instances, the timing of satisfying these obligations can be difficult to estimate. Accordingly, our estimates could
change. Such changes to estimates would result in a change in revenue recognition amounts. If these estimates
and judgments were to change over the course of these agreements, it could affect the timing and amount of
revenue that we would recognize and record in future periods.

Stock-based Compensation

Effective January 1, 2006, we adopted Statement of Financial Accounting Standards No. 123(revised 2004),
Share-Based Payment (SFAS 123(R)) which generally requires that such transactions be accounted for using a
fair-value-based method.

We have recorded employee stock-based compensation expense of $2,182,000, $3,105,000 and $3,820,000
for the years ended December 31, 2008, 2007 and 2006, respectively. For the options outstanding as of
December 31, 2008, we estimate that we will record approximately $1,200,000 to $1,600,000, in stock-based
compensation expense under SFAS 123(R) in 2009. We expect that we will issue additional options in 2009 that
will increase the amount of stock-based compensation ultimately recognized. The amount of the incremental
employee stock-based compensation expense attributable to 2009 employee stock options will depend primarily
on the number of stock options issued to employees in 2009, the fair market value of our common stock at the
respective grant dates, and the specific terms of the stock options.

The valuation of employee stock options is an inherently subjective process, since market values are
generally not available for long-term, non-transferable employee stock options. Accordingly, an option-pricing
model is utilized to derive an estimated fair value. In calculating the estimated fair value of our stock options, we
used a Black-Scholes pricing model for a majority of our stock awards and, for a small subset of our awards that
contained a market condition, a lattice model. Both of these models require the consideration of the following six
variables for purposes of estimating fair value:

•

•

•

•

•

•

the stock option exercise price

the expected term of the option

the grant date price of our common stock

the expected volatility of our common stock

the expected dividends on our common stock, which we do not anticipate paying for the foreseeable
future, and

the risk free interest rate for the expected option term

Of the variables above, we believe that the selection of an expected term and expected stock price volatility
are the most subjective. In accordance with the transition provisions of SFAS 123(R), the grant date estimates of
fair value associated with prior awards have not been changed. The specific valuation assumptions that were
utilized for purposes of deriving an estimate of fair value at the time that prior awards were issued are as
disclosed in our prior annual reports on Form 10-K, as filed with the SEC.

Upon adoption of SFAS 123(R), we were also required to estimate the level of award forfeitures expected to
occur, and record compensation expense only for those awards that we ultimately expect will vest. Accordingly,
we performed a historical analysis of option awards that were forfeited prior to vesting, and recorded total stock

47

option expense that reflected this estimated forfeiture rate for each of the quarterly periods in 2008, 2007 and
2006. This analysis is re-evaluated quarterly and the forfeiture rate is adjusted as necessary to reflect the actual
forfeitures for the reporting period. Ultimately, the actual expense recognized over the vesting period will only be
for those shares that vest.

Fair Value Measurements

Effective January 1, 2008, we adopted the provisions of SFAS (SFAS) No. 157, Fair Value Measurements
for our financial assets and financial liabilities. The adoption of SFAS No. 157 has not had a material impact on
our financial position or results of operations. In accordance with Financial Accounting Standards Board Staff
Position (FSP) No. 157-2, Effective Date of FASB Statement No. 157, we will delay application of SFAS No. 157
for non-financial assets and non-financial liabilities, except those that are recognized or disclosed at fair value in
the financial statements on a recurring basis, until January 1, 2009. SFAS No. 159, The Fair Value Option for
Financial Assets and Financial Liabilities Including an Amendment of FASB Statement No. 115, (SFAS No. 159)
became effective January 1, 2008 and permits entities to choose to measure many financial instruments and
certain other items at fair value that are not currently required to be measured at fair value. We did not elect to
adopt the fair value option for eligible financial instruments under SFAS No. 159.

SFAS No. 157 provides a framework for measuring fair value under U.S. generally accepted accounting
principles and requires expanded disclosures regarding fair value measurements. SFAS No. 157 defines fair
value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the
principal or most advantageous market for the asset or liability in an orderly transaction between market
participants on the measurement date. Market participants are buyers and sellers in the principal market that are
(i) independent, (ii) knowledgeable, (iii) able to transact, and (iv) willing to transact.

SFAS No. 157 requires the use of valuation techniques that are consistent with the market approach, the
income approach and/or the cost approach. The market approach uses prices and other relevant information
generated by market transactions involving identical or comparable assets and liabilities. The income approach
uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount
on a discounted basis. The cost approach is based on the amount that currently would be required to replace the
service capacity of an asset (replacement cost). Valuation techniques should be consistently applied. SFAS
No. 157 also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs,
where available, and minimize the use of unobservable inputs when measuring fair value. The standard describes
three levels of inputs that may be used to measure fair value:

Level 1

Quoted prices in active markets for identical assets or liabilities.

Level 2

Observable inputs other than Level 1 prices, such as quoted prices for similar assets or
liabilities; quoted prices in markets that are not active; or other inputs that are observable or
can be corroborated by observable market data for substantially the full term of the assets or
liabilities.

Level 3

Unobservable inputs that are supported by little or no market activity and that are
significant to the fair value of the assets or liabilities.

Our cash equivalents and marketable securities have been classified as Level 1 assets. We do not hold any
asset-backed or auction rate securities. Short-term accounts receivable and accounts payable are reflected in the
consolidated financial statements at net realizable value, which approximates fair value due to the short-term
nature of these instruments. In general, fair value is based upon quoted market prices, where available. While we
believe our valuation methodologies are appropriate and consistent with other market participants, the use of
different methodologies or assumptions to determine the fair value of certain financial instruments could result in
a different estimate of fair value at the reporting date.

48

Long-lived Assets

Long-lived assets consist primarily of property and equipment and goodwill. In the ordinary course of our
business, we incur costs that at times have been substantial related to property and equipment. Property and
equipment is stated at cost and depreciated over the estimated useful lives of the related assets using the straight-
line method. Determining the economic lives of property and equipment requires us to make significant
judgments that can materially impact our operating results. If it were determined that the carrying value of our
other long-lived assets might not be recoverable based upon the existence of one or more indicators of
impairment, we would measure an impairment based on application of SFAS No. 144, Accounting for the
Impairment or Disposal of Long-Lived Assets.

During 2006, we initiated a realignment of our research programs, shifting our focus on later-stage
preclinical drug development programs and de-emphasizing our earlier discovery research programs. As a result,
in 2006 we recorded an impairment charge of $148,000 related to certain of our equipment that was no longer
used in our discovery or other programs. In addition, we revised our estimates of the depreciable lives on the
remaining equipment currently being used in our discovery research programs as a result of the conclusion of
two of our discovery screening programs in late 2006 and early 2007.

In March 2007, our BMP-7 small molecule screening agreement with Centocor (a Johnson & Johnson
subsidiary) concluded in accordance with the terms of the agreement. The BMP-7 small molecule screening
program was the only remaining program utilizing the majority of our existing discovery screening equipment.
We determined that we would not fund the BMP small molecule program internally. As a result, during the year
ended December 31, 2007, we recorded additional property and equipment impairment charges of $352,000,
because this discovery equipment could not be used on other ongoing programs.

We assess the impairment of identifiable long-lived assets whenever events or changes in circumstances
indicate that the carrying value may not be recoverable. In addition, we perform a goodwill impairment test
annually. Since January 1, 2002, we have applied the provisions of Statement of Financial Accounting Standards,
or SFAS, No. 142, Goodwill and Other Intangibles. SFAS No. 142 requires us to perform an impairment
assessment annually or whenever events or changes in circumstances indicate that our goodwill may be impaired.
We completed our annual goodwill impairment tests in December 2008, 2007 and 2006, and determined that as
of those dates our fair value exceeded the carrying value of our net assets. Accordingly, no goodwill impairment
was recognized in 2008, 2007 and 2006.

Our discussion of our critical accounting policies is not intended to be a comprehensive discussion of all of
our accounting policies. In many cases, the accounting treatment of a particular transaction is specifically
dictated by generally accepted accounting principles, with no need for management’s judgment
in their
application. There are also areas in which management’s judgment in selecting any available alternative would
not produce a materially different result.

49

Results of Operations

Years Ended December 31, 2008 and 2007

Revenues

Total revenues are summarized as follows:

For the Year Ended
December 31,

2008

2007

Percentage
Increase/
(Decrease)

Revenues:
Research and development contracts

Genentech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wyeth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procter & Gamble . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Centocor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Subtotal
License fees

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Genentech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wyeth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stryker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procter & Gamble . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 282,000
196,000
—
—
36,000

514,000

6,000,000
103,000
1,750,000
—

$

962,000
1,529,000
636,000
73,000
62,000

3,262,000

11,446,000
439,000
—
1,242,000

Subtotal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7,853,000

13,127,000

Total Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$8,367,000

$16,389,000

(71%)
(87%)
(100%)
(100%)
(42%)

(84%)

(48%)
(77%)
100%
(100%)

(40%)

(49%)

Total revenues decreased by $8,022,000, or 49%, to $8,367,000 for the year ended December 31, 2008 from
$16,389,000 for the prior year. Research and development contracts decreased by $2,748,000 because all
research funding for programs under collaboration concluded at various times beginning in March 2007, and we
currently receive no research funding for our programs under past or current collaborations. We expect that our
future research and development contract revenues will be limited to expenses that we incur on behalf of our
collaborator, Genentech, for which Genentech is obligated to reimburse us.

In addition, our license revenues decreased by $5,274,000, or 40%, to $7,853,000 for the year ended
December 31, 2008 from $13,127,000 for the prior year. The decrease is primarily due to the recognition of
$7,509,000 revenue under our June 2003 Hedgehog pathway inhibitor collaboration with Genentech during 2007
resulting from changed facts and circumstances related to our joint steering committee performance obligations.
This amount had been previously deferred indefinitely. In addition, we recorded $3,000,000 in license fee
revenues received from Genentech as a contingent cash payment during the year ended December 31, 2007, and
we recorded $6,000,000 in license fee revenues received from Genentech related to contingent cash payments
received during the year ended December 31, 2008. License revenues recognized under our collaborations with
Procter & Gamble and Wyeth decreased $1,242,000 and $336,000, respectively, as a result of the conclusion of
these collaborations. These decreases were offset by $1,750,000 in license revenue recognized for the sale and
assignment of our remaining BMP assets to Stryker Corporation during the year ended December 31, 2008.

50

Operating Expenses

Research and development expenses are summarized as follows:

Research and Development Program Primary Indication

Collaborator

2008

2007

For the Year
Ended December 31,

Percentage
Increase/
(Decrease)

Hedgehog pathway inhibitor
CUDC-101 (HDAC, EGFR, Her2

Cancer

inhibitor)

CUDC-305 (Hsp90 inhibitor)
Other targeted cancer programs
Other targeted programs

Hedgehog small molecule agonist or

protein

Wnt signaling pathway
Hedgehog small molecule agonist
Discovery research
Net impairment of assets
Stock-based compensation

Cancer
Cancer
Cancer
Nervous system disorders/
cardiovascular disease
Nervous system disorders/
cardiovascular disease

Cancer
Hair loss
Various
N/A
N/A

Genentech

$

457,000 $

245,000

87%

Internal
Internal
Internal

Internal

Wyeth
Genentech
Procter & Gamble
Various/internal

4,002,000
2,693,000
4,402,000

5,056,000
—
4,893,000

(21%)
100%
(10%)

416,000

—

100%

199,000
—
—
123,000
191,000
743,000

1,593,000
638,000
23,000
1,265,000
263,000
803,000

(88%)
(100%)
(100%)
(90%)
(27%)
(7%)

Total research and development expense

$13,226,000 $14,779,000

(11%)

Our research and development expenses decreased by $1,553,000, or 11%, to $13,226,000 for the year
ended December 31, 2008, as compared to $14,779,000 for the prior year period. This decrease was due to
decreased spending on programs under collaborations offset by increased spending on our targeted programs,
specifically CUDC-305, which was selected as a development candidate in July 2008. Spending on our
collaborator-funded programs with (i) Genentech for the Wnt signaling pathway; (ii) Wyeth for the Hedgehog
agonist; and (iii) Centocor for BMP-7 small molecule agonists decreased by an aggregate amount of $2,472,000
as a result of the conclusion of the research funding for each of these programs at various times between March
2007 and February 2008. Certain of these resources were reallocated across our internal targeted cancer
programs. Our lead targeted drug development candidate, CUDC-101, which was selected for clinical
development in March 2007 and for which we initiated a phase I clinical trial in August 2008, accounted for a
decrease in spending of $1,054,000. Offsetting these decreases, spending on our second development candidate,
CUDC-305, accounted for an increase in spending of $2,693,000. We expect that our targeted cancer programs
will consist of a majority of our ongoing future research and development expenses for the foreseeable future.

During the year ended December 31, 2008, we also incurred expenses of $457,000, an increase of $212,000
over the same prior year period, related to $300,000 in sublicense payments we were required to make under our
Hedgehog pathway inhibitor program as a result of the $6,000,000 in contingent payments received from
Genentech for the achievement of clinical development objectives during 2008. During 2007, we incurred
sublicense payments of $150,000 related to this program. We expect that future research and development
expenses related to our Hedgehog pathway inhibitor program will be nominal.

51

General and administrative expenses are summarized as follows:

For the Year Ended
December 31,

2008

2007

Percentage
Increase/
(Decrease)

Personnel
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Occupancy and depreciation . . . . . . . . . . . . . . . . . . . . . . . . .
Legal services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consulting and professional services . . . . . . . . . . . . . . . . . . .
Insurance costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other general and administrative expenses . . . . . . . . . . . . . .
Stock-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . . .

$2,298,000
376,000
1,672,000
1,177,000
352,000
922,000
1,463,000

$2,697,000
138,000
2,220,000
1,122,000
443,000
977,000
2,387,000

Total general and administrative expenses . . . . . . . . . .

$8,260,000

$9,984,000

(15%)
172%
(25%)
5%
(21%)
(6%)
(39%)

(17%)

General and administrative expenses decreased $1,724,000, or 17%, for the year ended December 31, 2008
as compared to 2007 as a result of expense reductions in most cost categories, offset by increases in spending for
occupancy-related expenses. Stock-based compensation decreased $924,000 for the year ended December 31,
2008 as a result of the grant of stock options for a smaller number of shares, and related expense, awarded during
2008 compared to the prior year period. In addition, legal services decreased $548,000, primarily due to costs
associated with foreign patent applications in the prior year period, and employee costs decreased $399,000. For
the year ended December 31, 2007, employee costs related to bonuses and 401(k) matching contribution costs
were $260,000. We did not incur such costs during 2008 due to spending reductions taken in an effort to
conserve cash. In furtherance of these efforts, our executive officers reduced their respective salaries in October
2008 in exchange for stock options and restricted stock.

Offsetting these decreases, occupancy and depreciation costs increased $238,000 as a result of proceeds
received under a settlement agreement entered into with a former subtenant that had defaulted on a sublease of
our 61 Moulton Street facility during the year ended December 31, 2007.

Other Income (Expense)

For the year ended December 31, 2008, interest income was $990,000 as compared to $1,609,000 for the
year ended December 31, 2007, a decrease of $619,000, or 38%. The decrease in interest income resulted
primarily from lower average cash and investment balances as well as lower interest rates for the year ended
December 31, 2008 as compared to the year ended December 31, 2007.

For the year ended December 31, 2008, other income was $10,000 as compared to other expense of
$114,000 for the year ended December 31, 2007, an increase of $124,000, or 109%. During the year ended
December 31, 2007, we wrote down the carrying value of our investment in ES Cell International equity
securities, recognizing a charge of $145,000.

For the year ended December 31, 2008, interest expense was $4,000, as compared to $85,000 for the year
ended December 31, 2007, a decrease of $81,000, or 95%. The decrease resulted from lower outstanding debt
obligations during the year ended December 31, 2008 under our notes with the Boston Private Bank & Trust
Company which were fully repaid in April 2008.

Net Loss Applicable to Common Stockholders

As a result of the foregoing, we incurred a net loss applicable to common stockholders of $12,123,000 for

the year ended December 31, 2008, as compared to $6,964,000 for the year ended December 31, 2007.

52

Years Ended December 31, 2007 and 2006

Revenues

Total revenues are summarized as follows:

For the Year Ended
December 31,

2007

2006

Percentage
Increase/
(Decrease)

Revenues:
Research and development contracts

Genentech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wyeth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procter & Gamble . . . . . . . . . . . . . . . . . . . . . . . . . . .
Centocor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spinal Muscular Atrophy Foundation . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Subtotal
License fees

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Genentech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wyeth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procter & Gamble . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Micromet

Subtotal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Substantive milestones . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

962,000
1,529,000
636,000
73,000
—
62,000

3,262,000

11,446,000
439,000
1,242,000
—

13,127,000
—

$ 4,758,000
2,299,000
663,000
400,000
1,191,000
28,000

9,339,000

1,500,000
306,000
234,000
2,284,000

4,324,000
3,000,000

Gross Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16,389,000

16,663,000

(80%)
(33%)
(4%)
(82%)
(100%)
121%

(65%)

663%
43%
431%
(100%)

204%
(100%)

(2%)

Contra-revenues from co-development with

Genentech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

—

(1,728,000)

(100%)

Net Revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$16,389,000

$14,935,000

10%

Gross revenues decreased by $274,000, or 2%, to $16,389,000 for the year ended December 31, 2007 from
$16,663,000 for the prior year. The net decrease was due to decreases in research funding and substantive
milestone revenues offset by an increase in license revenues. The decrease in research and development contracts
of $6,077,000 was the result of the conclusion of research funding in the fourth quarter of 2006 and first quarter
of 2007 under four collaborations, including the conclusion of the research funding portion of our Hedgehog
pathway inhibitor and Wnt collaborations with Genentech, a sponsored research agreement with the SMA
Foundation and a screening agreement with Centocor. The termination of research funding under these
arrangements accounted for $5,314,000 of the decrease in research and development contract revenues. In
addition, during the first quarter of 2007 Wyeth decreased from eight to five the number of our researchers
supported by Wyeth under our Hedgehog agonist program.

License revenues increased $8,803,000, or 204%, for the year ended December 31, 2007 as compared to the
prior year, primarily due to the recognition of $10,509,000 in revenue under our June 2003 Hedgehog pathway
inhibitor collaboration with Genentech. Prior to the fourth quarter of 2007, we could not estimate the
performance period related to our ongoing joint steering committee obligation under this collaboration and
therefore deferred $7,509,000 in payments that we had received from Genentech in prior years. During the fourth
quarter of 2007, as a result of changed facts and circumstances, we concluded that our joint steering committee
performance obligation had become inconsequential and perfunctory to the agreement. Accordingly, during the
fourth quarter of 2007 we recorded as licensing revenues the $7,509,000 in previously deferred revenues as well
as $3,000,000 from a contingent cash payment that we received in October 2007. In addition, we accelerated
recognition of license fee revenue related to our September 2005 collaboration with Procter & Gamble, since

53

Procter & Gamble terminated this collaboration effective November 2007. This termination resulted in a
decrease in our estimated performance period under this collaboration, resulting in additional revenue of
$1,008,000 for the year ended December 31, 2007 as compared to the year ended December 31, 2006.

The increase in license fee revenues under our June 2003 Hedgehog pathway inhibitor collaboration with
Genentech and our September 2005 collaboration with Procter & Gamble were partially offset by decreases in
license fee revenues for two of our other research programs. We recorded $937,500 in license revenue during
2007 under our April 2005 Wnt collaboration with Genentech, as compared to $1,500,000 for the prior year
period. In addition, during the year ended December 31, 2006, we recognized $2,284,000 in license fee revenue
as part of a settlement agreement with a former collaborator, Micromet. We did not record any license fee
revenue under this agreement in 2007.

We also recorded $3,000,000 in substantive milestone revenue during the year ended December 31, 2006
under our June 2003 collaboration with Genentech. In addition, we did not record contra-revenues for the year
ended December 31, 2007 compared to contra-revenues of $1,728,000 for the year ended December 31, 2006. On
August 31, 2006, we ceased our participation in a co-development arrangement with Genentech of a basal cell
carcinoma drug candidate pursuant to which we had been recording contra-revenues.

Operating Expenses

Research and development expenses are summarized as follows:

Research and Development Program Primary Indication

Collaborator

2007

2006

For the Year
Ended December 31,

Percentage
Increase/
(Decrease)

Hh pathway inhibitor
CUDC-101 (HDAC, EGFR, Her2

Cancer

inhibitor)

Single and multi-target inhibitors
Hh small molecule agonist or

protein

Wnt signaling pathway
Hh small molecule agonist
Discovery research
Net impairment of assets
Stock-based compensation

Cancer
Cancer
Nervous system disorders/
cardiovascular disease

Cancer
Hair loss
Various
N/A
N/A

Total research and development expense

Genentech

$

245,000 $ 1,695,000

(86%)

Internal
Internal

5,056,000
4,893,000

— 100%
130%

2,124,000

Wyeth
Genentech
Procter & Gamble
Various/internal

1,593,000
638,000
23,000
1,265,000
263,000
803,000

2,409,000
2,763,000
835,000
3,511,000
148,000
1,105,000

(34%)
(77%)
(97%)
(64%)
78%
(27%)

$14,779,000 $14,590,000

1%

Our research and development expenses increased by $189,000, or 1%, to $14,779,000 for the year ended
December 31, 2007 as compared to $14,590,000 for the prior year period. This is due to the result of several
offsetting variances within our various programs. We increased spending by $7,825,000 for the internal
development of our targeted cancer drug development programs, including CUDC-101, as we shifted spending
from several previously funded programs that have concluded. These previously funded programs decreased by
$6,633,000 from the prior year period and included (i) the conclusion in the fourth quarter of 2006 and first
quarter of 2007 of the research funding under our ongoing Hedgehog pathway inhibitor and our Wnt signaling
pathway collaborations with Genentech, (ii) the termination by Procter & Gamble of a September 2005
Hedgehog agonist collaboration agreement for hair loss, and (iii) the conclusion of a sponsored research
agreement with the SMA Foundation and a BMP-7 small molecule screening agreement with Centocor, both to
conduct discovery research activities.

Spending on our collaborator-funded program with Wyeth decreased $816,000 as a result of fewer
researchers supporting the respective program. Funding on this program concluded in February 2008 in
accordance with the terms of the agreement.

54

Stock-based compensation expense also decreased $302,000 as a result of a decline in the grant date fair

value of stock options issued in 2007 as compared to 2006, which resulted in lower compensation expense.

As the research funding concluded on programs under collaboration and as we shifted our research focus,
we reallocated certain of these resources to our internal targeted cancer drug development programs, including
CUDC-101, which we initiated in the first half of 2006. These programs accounted for $9,949,000, or 67%, of
our 2007 research and development expense compared to $2,124,000 for the same prior year period, an increase
of $7,825,000.

General and administrative expenses are summarized as follows:

For the Year Ended
December 31,

2007

2006

Percentage
Increase/
(Decrease)

Personnel
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Occupancy and depreciation . . . . . . . . . . . . . . . . . . . . . . . .
Legal services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consulting and professional services . . . . . . . . . . . . . . . . . .
Insurance costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other general and administrative expenses . . . . . . . . . . . . .
Stock-based compensation . . . . . . . . . . . . . . . . . . . . . . . . . .

$2,697,000
138,000
2,220,000
1,122,000
443,000
977,000
2,387,000

$ 2,758,000
678,000
1,558,000
1,450,000
451,000
822,000
2,657,000

Total general and administrative expenses . . . . . . . . .

$9,984,000

$10,374,000

(2%)
(80%)
42%
(23%)
(2%)
19%
(10%)

(4%)

General and administrative expenses decreased $390,000, or 4%, for the year ended December 31, 2007 as
compared to 2006 as a result of expense reductions in most cost categories, offset by increases in spending for
legal services and other administrative expenses. These decreases included our receipt in 2007 of $262,000 in
proceeds under an April 2007 settlement agreement entered into with a former subtenant that had defaulted on a
sublease of our 61 Moulton Street facility. We recorded $212,000 of this amount as a reduction of expense. In
addition, our lease on our 61 Moulton Street facility concluded on April 30, 2007, which reduced our overall
occupancy costs. Professional and consulting services decreased $328,000 as a result of expenses incurred for the
restatement of our prior financial statements during the first quarter of 2006 and costs incurred during 2006
associated with the formation of our Chinese subsidiary, including technology evaluations and review of business
development opportunities in China. In addition, personnel costs and stock-based compensation decreased
$61,000 and $270,000, respectively. Stock-based compensation expense decreased as a result of a decline in the
grant date fair value of stock options issued in 2007 as compared to 2006, which resulted in lower compensation
expense.

Offsetting these decreases, legal services increased $662,000 as a result of increased spending related to our
patent portfolio,
including filings related to CUDC-101, other programs under our targeted cancer drug
development platform and foreign patent applications. Other general and administrative costs are comprised of
travel costs, temporary help, and computer and office supplies. These costs increased $155,000 primarily due to
increased travel costs and higher NASDAQ filing fees resulting from our August 2007 private placement.

Other Income (Expense)

For the year ended December 31, 2007, interest income was $1,609,000 as compared to $1,577,000 for the
year ended December 31, 2006, an increase of $32,000, or 2%. The increase in interest income resulted primarily
from higher interest rates for the year ended December 31, 2007 as compared to the year ended December 31,
2006.

For the year ended December 31, 2007, other expense was $114,000 as compared to $155,000 for the year
ended December 31, 2006, a decrease of $41,000, or 26%. During the year ended December 31, 2007, we wrote

55

down the carrying value of our investment in ES Cell International equity securities, recognizing a charge of
$145,000 compared to a charge of $164,000 from the write down of the carrying value of our investment in
Aegera equity securities during the year ended December 31, 2006.

For the year ended December 31, 2007, interest expense was $85,000, as compared to $196,000 for the year
ended December 31, 2006, a decrease of $111,000, or 57%. The decrease resulted from lower outstanding debt
obligations during the year ended December 31, 2007 under our notes with the Boston Private Bank & Trust
Company.

Net Loss Applicable to Common Stockholders

As a result of the foregoing, we incurred a net loss applicable to common stockholders of $6,964,000 for the

year ended December 31, 2007, as compared to $8,829,000 for the year ended December 31, 2006.

Liquidity and Capital Resources

We have financed our operations primarily through license fees, contingent cash payments and research and
development funding from our collaborators and licensors, the private and public placement of our equity
securities, debt financings and the monetization of certain royalty rights.

At December 31, 2008, our principal sources of liquidity consisted of cash, cash equivalents, and marketable
securities of $28,853,000, excluding restricted long-term investments of $210,000. Our cash and cash equivalents
are highly liquid investments with a maturity of three months or less at date of purchase and consist of time
deposits and investments in money market funds with commercial banks and financial institutions, short-term
commercial paper, and government obligations. We maintain cash balances with financial institutions in excess
of insured limits. While as of the date of this filing, we are not aware of any downgrades, material losses, or other
significant deterioration in the fair value of our cash equivalents or marketable securities since December 31,
2008, no assurance can be given that further deterioration in conditions of the global credit and financial markets
would not negatively impact our current portfolio of cash equivalents or marketable securities or our ability to
meet our financing objectives. Further dislocations in the credit market may adversely impact the value and/or
liquidity of marketable securities owned by us.

The use of our cash flows for operations has primarily consisted of salaries and wages for our employees,
facility and facility-related costs for our office and laboratory, fees paid in connection with preclinical studies,
laboratory supplies, consulting fees and legal fees. During the third quarter of 2008, we began incurring clinical
costs associated with our phase I trial of CUDC-101. We expect that costs associated with clinical studies will
increase in future periods assuming that CUDC-101 advances into further stages of clinical testing and other of
our targeted cancer drug candidates reach clinical trials.

To date, the primary source of our cash flows from operations has been payments received from our
collaborators and licensors. As a result of the conclusion of all research funding, the majority of our research and
development effort and expense has shifted from our programs that were funded under collaborations relating to
the Hedgehog pathway and various discovery and preclinical programs to the development of our targeted cancer
programs, particularly for our lead targeted cancer drug candidate, CUDC-101, and CUDC-305, which we
selected as a development candidate in July 2008 and is currently being evaluated in IND-enabling studies.

While we are seeking a corporate collaborator for one or more of our targeted cancer programs, we are
currently progressing the research and development of these programs on our own. We believe that our research
and development expenses will increase in future years in connection with our plans to continue phase I clinical
testing for CUDC-101 and to progress CUDC-305 in preclinical testing toward an anticipated IND filing in
mid-2009. We are actively seeking collaborators for our targeted cancer drug candidates, particularly CUDC-
305, but have not reached advanced stages of negotiation with any party. Our intention is to enter into a license

56

or collaboration agreement with CUDC-305 prior to initiation of phase I clinical testing. If we are unable to
consummate such a transaction, we would consider our further development options for CUDC-305. Our ability
to progress CUDC-305 would depend on a number of factors including, our future cash position and the overall
financial markets, and phase I data generated by CUDC-101, among others.

In general, our only source of cash flows from operations for the foreseeable future will be up-front license
payments and funded research and development that we may receive under new collaboration agreements, if any,
contingent cash payments for the achievement of development objectives,
if any are met, under new
collaborations or our existing collaborations with Genentech and royalty payments that are contingent upon the
successful commercialization of any products based upon collaborations. The timing of or entrance into any new
collaboration agreements and any contingent cash payments under our existing collaboration agreements with
Genentech are not assured, cannot be easily predicted and may vary significantly from quarter to quarter.

Net cash used in operating activities was $12,441,000 for the year ended December 31, 2008, compared to
$8,594,000 for the year ended December 31, 2007. Cash used in operating activities during the year ended
December 31, 2008 was primarily the result of our net loss for the period of $12,123,000. In addition, changes in
certain operating assets and liabilities affected operating cash during the year ended December 31, 2008,
including a decrease in deferred revenue of $1,853,000 as a result of the recognition of the $1,750,000 license fee
that we received in December 2007 under our BMP transaction with Stryker Corporation and a decrease of
$1,961,000 in our accounts payable and accrued liabilities. Offsetting these decreases were noncash items stock-
based compensation expense of $2,206,000 and depreciation of $999,000.

Cash used in operating activities during the years ended December 31, 2007 was primarily the result of our
net loss for the period of $6,964,000. In addition, changes in certain operating assets and liabilities offset these
increases in operating cash during year ended December 31, 2007. Specifically, our deferred revenue decreased
$9,034,000 as a result of accelerated license fee amortization under our Genentech and Procter & Gamble
collaborations. Offsetting this decrease, our accounts receivables decreased $1,112,000 primarily related to our
Microment settlement, and our accounts payable and accrued liabilities increased $1,201,000. Finally, several
noncash items further offset our net
including stock-based compensation expense of $3,190,000,
depreciation of $1,302,000 and impairment of assets of $497,000.

loss,

We expect to continue to use cash in operations as we continue to seek to advance our targeted cancer drug
programs through preclinical testing and into clinical development. In addition, in the future we may owe
royalties and other contingent payments to our licensors based on the achievement of developmental milestones,
product sales and other specified objectives.

Investing activities provided cash of $5,316,000 for the year ended December 31, 2008, resulting from
$5,376,000 in net investment sales to fund ongoing operations. Investing activities used $5,919,000 of cash for
the year ended December 31, 2007, resulting from $6,160,000 in net investment purchases primarily related to
investment of funds received from our August 2007 private placement. In addition, for the year ended
December 31, 2007, we received $316,000 in net proceeds from the sale of certain of our assets used to pay down
our outstanding principal obligations to the Boston Private Bank & Trust Company. We currently do not expect
to undertake any significant capital projects during 2009.

Financing activities used cash of approximately $112,000 for the year ended December 31, 2008, resulting
from repayment of $401,000 on our notes with the Boston Private Bank & Trust Company, which were canceled
in April 2008. This decrease in cash was offset by cash received of $289,000 upon the exercise of stock options
and purchases under our employee stock purchase plan. Financing activities provided cash of $13,080,000 for the
year ended December 31, 2007, resulting primarily from $14,646,000 received in issuances of common stock,
including net proceeds of $14,422,000 from our August 2007 private placement of common stock and $224,000
received upon the exercise of stock options and purchases under our employee stock purchase plan. Offsetting
these increases in cash, we repaid $1,565,000 of our term debt with the Boston Private Bank & Trust Company.

57

Contractual Obligations

As of December 31, 2008, we had future payments required under contractual obligations and other
commitments, including an operating lease related to our facility, research services agreements, consulting
agreements, and license agreements, as follows:

Operating lease obligations . . . . . . . . . . . . . . . . . . . . . .
Outside service obligations(1) . . . . . . . . . . . . . . . . . . . .
Licensing obligations(2) . . . . . . . . . . . . . . . . . . . . . . . .

Total

$1,896
1,475
230

$ 948
1,470
230

Total future obligations . . . . . . . . . . . . . . . . . . . . .

$3,601

$2,648

$948
5
—

$953

$—
—
—

$—

$—
—
—

$—

Payment Due By Period (amounts in 000’s)

Less than
One Year

One to
Three Years

Three to
Five Years

More than
Five Years

(1) Outside service obligations consist of agreements we have with outside labs, consultants and various other

service organizations.

(2)

In the future, we may owe royalties and other contingent payments to our licensees based on the
achievement of developmental milestones, product sales and specified other objectives. These potential
future obligations are not included in the above table.

We anticipate that existing capital resources at December 31, 2008, together with the $6,000,000 we will
receive from Genentech in the first quarter of 2009, should enable us to maintain current and planned operations
into mid-2010. We expect to incur substantial additional research and development and other costs, including
costs related to preclinical studies and clinical trials, for the foreseeable future. Our ability to continue funding
planned operations beyond mid-2010 is dependent upon, among other things, the success of our collaborations,
our ability to control our cash burn rate and our ability to raise additional funds through additional corporate
collaborations, equity or debt financings, or from other sources of financing. We are seeking additional
collaborative arrangements and also anticipate that we will seek to raise funds through one or more financing
transactions, if conditions permit. Due to our significant long-term capital requirements, we intend to seek to
raise funds through the sale of debt or equity securities when conditions are favorable, even if we do not have an
immediate need for additional capital at such time. Our general business strategy may be adversely affected by
the recent economic downturn and volatile business environment and continued unpredictable and unstable
market conditions. If the current equity and credit markets deteriorate further, or do not improve, it may make
any necessary debt or equity financing more difficult or impossible, more costly, and more dilutive. Failure to
secure any necessary financing in a timely manner and on favorable terms could have a material adverse effect
on our growth strategy, financial performance and stock price and could require us to delay or abandon clinical
development plans. In addition, there is a risk that one or more of our current service providers, manufacturers
and other partners may not survive these difficult economic times, which would directly affect our ability to
attain our operating goals on schedule and on budget. See “Part I, Item 1A—Risk Factors,” for a further
discussion of certain risks and uncertainties that could affect our liquidity, capital requirements and ability to
raise additional capital.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements as of December 31, 2008.

Inflation

We believe that inflation has not had a significant impact on our revenue and results of operations since

inception.

58

New Accounting Pronouncements

In December 2007, the FASB issued SFAS No. 141(R), Business Combinations (SFAS No. 141(R)). SFAS
No. 141(R) establishes principles and requirements for how an acquirer recognizes and measures in its financial
statements the identifiable assets acquired, the liabilities assumed, any noncontrolling interest in the acquiree and
the goodwill acquired. SFAS No. 141(R) also establishes disclosure requirements to enable the evaluation of the
nature and financial effects of the business combination. SFAS No. 141(R) is effective for fiscal years beginning
after December 15, 2008. SFAS No. 141(R) will have an impact on our financial statements if we are involved in
a business combination that occurs after January 1, 2009.

In December 2007, the EITF issued Issue No. 07-1, Accounting for Collaborative Arrangements (EITF
Issue No. 07-1). This Issue is effective for financial statements issued for fiscal years beginning after
December 15, 2008, and interim periods within those fiscal years, and shall be applied retrospectively to all prior
periods presented for all collaborative arrangements existing as of the effective date that include a joint operating
activity (i.e., co-development) and that are operated as a “virtual joint venture.” This Issue includes enhanced
disclosure requirements regarding the nature and purpose of the arrangement, rights and obligations under the
arrangement, accounting policy, amount and income statement classification of collaboration transactions
between the parties. This Issue also requires that transactions with third parties (i.e., parties that do not participate
in the collaborative arrangement) should be reported in the appropriate line item in each company’s financial
statement pursuant to the guidance in EITF Issue No. 99-19, Reporting Revenue Gross as a Principal versus Net
as an Agent. We have historically entered into collaborative arrangements in which this Issue would be
applicable; however, we do not expect the adoption of EITF 07-1 to have a material impact on our consolidated
financial statements as it relates to joint operating activities under current collaborations. Management will have
to evaluate the impact of this Issue on future collaborations that we may enter into.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our current cash balances in excess of operating requirements are invested in cash equivalents and short-
term marketable securities, which consist of time deposits and investments in money market funds with
commercial banks and financial institutions, short-term commercial paper, and government obligations with an
average maturity of less than one year. All marketable securities are considered available for sale. The primary
objective of our cash investment activities is to preserve principal while at the same time maximizing the income
we receive from our invested cash without significantly increasing risk of loss. This objective may be adversely
affected by the recent economic downturn and volatile business environment and continued unpredictable and
unstable market conditions. Our marketable securities are subject to interest rate risk and will fall in value if
market interest rates increase. While as of the date of this filing, we are not aware of any downgrades, material
losses, or other significant deterioration in the fair value of our cash equivalents or marketable securities since
December 31, 2008, no assurance can be given that further deterioration in conditions of the global credit and
financial markets would not negatively impact our current portfolio of cash equivalents or marketable securities
or our ability to meet our financing objectives. Further dislocations in the credit market may adversely impact the
value and/or liquidity of marketable securities owned by us. Our investments are investment grade securities, and
deposits are with investment grade financial institutions. We believe that the realization of losses due to changes
in credit spreads is unlikely as we currently have the ability to hold our investments for a sufficient period of time
to recover the fair value of the investment and there is sufficient evidence to indicate that the fair value of the
investment is recoverable. We do not use derivative financial instruments in our investment portfolio. We do not
believe that a 10% change in interest rate percentages would have a material impact on the fair value of our
investment portfolio or our interest income.

59

ITEM 8.

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial
reporting. Internal control over financial reporting is defined in Rules 13a-15(f) or 15d-15(f) promulgated under
the Securities Exchange Act of 1934, as amended, as a process designed by, or under the supervision of, our
principal executive and principal financial officers and effected by our board of directors, management and other
personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted accounting principles and
includes those policies and procedures that:

•

•

•

Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the
transactions and dispositions of our assets;

Provide reasonable assurance that transactions are recorded as necessary to permit preparation of
financial statements in accordance with generally accepted accounting principles, and that our receipts
and expenditures are being made only in accordance with authorizations of management and our
directors; and

Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use
or disposition of our assets that could have a material effect on the financial statements.

Because of its inherent
internal control over financial reporting may not prevent or detect
misstatements. Also, projections of evaluations of effectiveness to future periods are subject to the risk that
controls may become inadequate because of changes in conditions, or that the degree of compliance with the
policies or procedures may deteriorate.

limitations,

Our management assessed the effectiveness of our internal control over financial reporting as of December 31,
2008. In making this assessment our management used the criteria established in Internal Control—Integrated
Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission, or COSO.

Based on our assessment, management concluded that, as of December 31, 2008, our internal control over
financial reporting is effective based on the criteria established in Internal Control—Integrated Framework
issued by COSO.

The effectiveness of internal control over financial reporting as of December 31, 2008 has been audited by
PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which
appears herein.

60

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of Curis, Inc.:

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of
operations and comprehensive loss, of stockholders’ equity and of cash flows, present fairly, in all material
respects, the financial position of Curis, Inc. and its subsidiaries at December 31, 2008 and 2007, and the results
of their operations and their cash flows for each of the three years in the period ended December 31, 2008 in
conformity with accounting principles generally accepted in the United States of America. Also in our opinion,
the Company maintained, in all material respects, effective internal control over financial reporting as of
December 31, 2008, based on criteria established in Internal Control—Integrated Framework issued by the
Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is
responsible for these financial statements, for maintaining effective internal control over financial reporting and
for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying
Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express opinions on
these financial statements and on the Company’s internal control over financial reporting based on our integrated
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 audits to obtain reasonable
assurance about whether the financial statements are free of material misstatement and whether effective internal
control over financial reporting was maintained in all material respects. Our audits of the financial statements
included 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 financial statement presentation. Our audit of internal control over financial reporting included obtaining
an understanding of internal control over financial reporting, assessing the risk that a material weakness exists,
and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk.
Our audits also included performing such other procedures as we considered necessary in the circumstances. We
believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles. A company’s internal control over financial reporting
includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail,
accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable
assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance
with generally accepted accounting principles, and that receipts and expenditures of the company are being made
only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable
assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the
company’s assets that could have a material effect on the financial statements.

Because of its inherent
internal control over financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that
controls may become inadequate because of changes in conditions, or that the degree of compliance with the
policies or procedures may deteriorate.

limitations,

/s/ PRICEWATERHOUSECOOPERS LLP
Boston, Massachusetts
February 26, 2009

61

CURIS, INC. AND SUBSIDIARIES

Consolidated Balance Sheets

December 31,

2008

2007

Current Assets:

ASSETS

Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Marketable securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other current assets . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 10,158,795
18,694,200
107,341
373,373

$ 17,396,599
24,062,577
230,467
349,453

Total current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

29,333,709

42,039,096

Property and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-term investment—restricted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,448,176
210,007
8,982,000
7,980

2,577,602
210,007
8,982,000
7,980

$ 39,981,872

$ 53,816,685

LIABILITIES AND STOCKHOLDERS’ EQUITY

Current Liabilities:

Debt, current portion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue, current portion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other long-term liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

— $

1,961,439
624,462
—

2,585,901
171,375

2,757,276

403,832
3,222,091
1,150,931
1,852,518

6,629,372
342,750

6,972,122

Commitments (Notes 8 and 9)
Stockholders’ Equity:

Common stock, $0.01 par value—125,000,000 shares authorized;

64,701,405 and 63,653,698 shares issued and outstanding, respectively,
at December 31, 2008 and 64,288,793 and 63,241,086 shares issued
and outstanding, respectively, at December 31, 2007 . . . . . . . . . . . . . . .
Additional paid-in capital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treasury stock (at cost, 1,047,707 shares) . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated deficit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive income . . . . . . . . . . . . . . . . . . . . . . . . .

647,014
745,360,736
(891,274)
(12,550)
(707,970,836)
91,506

642,888
742,903,399
(891,274)
(46,286)
(695,847,738)
83,574

Total stockholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37,224,596

46,844,563

$ 39,981,872

$ 53,816,685

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

62

CURIS, INC. AND SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Loss

Years Ended December 31,

2008

2007

2006

Revenues:

Research and development contracts . . . . . . . . . . . . . . . . . . . .
License fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Substantive milestones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

Gross revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contra-revenues from co-development with Genentech . . . . .

514,099
7,852,518
—

8,366,617
—

$ 3,261,643
13,126,911
—

$ 9,339,191
4,324,173
3,000,000

16,388,554
—

16,663,364
(1,727,727)

Net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8,366,617

16,388,554

14,935,637

Costs and Expenses:

Research and development . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and administrative . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amortization related to intangible assets . . . . . . . . . . . . . . . . .

13,226,449
8,259,812
—

14,779,184
9,983,931
—

14,589,647
10,373,883
27,050

Total costs and expenses . . . . . . . . . . . . . . . . . . . . . . . . . .

21,486,261

24,763,115

24,990,580

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

(13,119,644)

(8,374,561)

(10,054,943)

Other Income (Expense):

Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income (expense) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

990,263
10,137
(3,854)

1,608,805
(113,644)
(84,843)

1,576,949
(155,124)
(196,204)

Total other income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

996,546

1,410,318

1,225,621

Net loss applicable to common stockholders . . . . . . . . . .

$(12,123,098) $ (6,964,243) $ (8,829,322)

Net Loss per Common Share (Basic and Diluted) . . . . . . . . . . . . . .

$

(0.19) $

(0.13) $

(0.18)

Weighted Average Common Shares (Basic and Diluted) . . . . . . . .

63,378,159

54,914,666

49,066,680

Net Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized Gain on Marketable Securities . . . . . . . . . . . . . . . . . . . .

$(12,123,098) $ (6,964,243) $ (8,829,322)
47,196

75,780

7,932

Comprehensive loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$(12,115,166) $ (6,888,463) $ (8,782,126)

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

63

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T

CURIS, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

Years Ended December 31,

2008

2007

2006

$(12,123,098) $ (6,964,243) $ (8,829,322)

Cash Flows from Operating Activities:
Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments to reconcile net loss to net cash used in operating

activities:

Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . .
Stock-based compensation expense . . . . . . . . . . . . . . . . . . . .
Reserve on loss of subtenant income . . . . . . . . . . . . . . . . . . .
Amortization of intangible assets . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
Impairment on property and equipment
Gain on sale of assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impairment of investment . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized foreign currency exchange gain . . . . . . . . . . . . . .
Changes in operating assets and liabilities:

998,596
2,206,472
—
—
191,376
—
—
—

Accounts receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other assets . . . . . . . . . . . . . . . . . .
Accounts payable and accrued and other liabilities . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total adjustments . . . . . . . . . . . . . . . . . . . . . . . . . .
Net cash used in operating activities . . . . . . . . . . . .

123,126
(23,920)
(1,961,115)
(1,852,518)
(317,983)
(12,441,081)

1,302,102
3,190,295
—
—
352,009
(87,761)
145,000
(26,935)

1,111,880
216,953
1,200,778
(9,034,315)
(1,629,994)
(8,594,237)

1,407,620
3,762,015
98,000
27,050
147,531
—
164,020
(40,280)

(272,621)
266,327
(1,603,100)
(1,106,851)
2,849,711
(5,979,611)

Cash Flows from Investing Activities:

Purchase of marketable securities . . . . . . . . . . . . . . . . . . . . . .
Sale of marketable securities . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase in restricted cash/restricted long-term

investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expenditures for property and equipment . . . . . . . . . . . . . . . .
Net proceeds from sale of assets . . . . . . . . . . . . . . . . . . . . . . .
Net cash provided by (used in) investing

(35,377,459)
40,753,768

(37,558,691)
31,398,569

(47,076,284)
51,195,829

—
(60,546)
—

(8,163)
(66,469)
316,121

(5,846)
(694,111)
—

activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5,315,763

(5,918,633)

3,419,588

Cash Flows from Financing Activities:

Proceeds from issuance of common stock, net of issuance

costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from other issuances of common stock . . . . . . . . . .
Repayments of notes payable and capital leases . . . . . . . . . . .
Net cash provided by (used in) financing

— 14,421,782
223,810
(1,565,455)

288,727
(401,213)

—
312,391
(1,233,334)

activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net decrease in Cash and Cash Equivalents . . . . . . . . . . . . . . . . . .
Cash and Cash Equivalents, beginning of period . . . . . . . . . . . . . .
Cash and Cash Equivalents, end of period . . . . . . . . . . . . . . . . . . .

(112,486)
(7,237,804)
17,396,599
$ 10,158,795

13,080,137
(1,432,733)
18,829,332
$ 17,396,599

(920,943)
(3,480,966)
22,310,298
$ 18,829,332

Supplemental cash flow data
Cash paid during the year for:

Interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

6,365

$

95,080

$

209,086

Supplemental Disclosure of Noncash Investing and Financing

Activities:

Issuance of common stock in connection with conversion of

note payable to Becton Dickinson (Note 8) . . . . . . . . . . . .

$

— $

— $ 2,605,280

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

65

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(1) OPERATIONS

Curis, Inc. (the “Company” or “Curis”) is a drug discovery and development company that
is
committed to leveraging its innovative signaling pathway drug technologies in seeking to develop next
generation targeted cancer therapies. In expanding the Company’s drug development efforts with
respect to these targeted cancer programs, Curis is building upon its past experiences in targeting
signaling pathways, including the Hedgehog pathway. Curis seeks to conduct research programs both
internally and through strategic collaborations.

The Company operates in a single reportable segment, which is the research and development of
innovative cancer therapeutics. The Company expects that any successful products would be used in
the health care industry and would be regulated in the United States by the U.S. Food and Drug
Administration, or FDA, and in overseas markets by similar regulatory agencies.

The Company is subject to risks common to companies in the biotechnology industry including, but not
limited to, development by its competitors of new or better technological innovations, dependence on
key personnel, its ability to protect proprietary technology, its ability to successfully advance discovery
and preclinical stage drug candidates in its internally funded programs, unproven technologies and drug
development approaches, reliance on corporate collaborators and licensors to successfully research,
develop and commercialize products based on the Company’s technologies, its ability to comply with
FDA government regulations and approval requirements as well as its ability to execute on its business
strategies and obtain adequate financing to fund its operations through corporate collaborations, sales
of equity or otherwise.

The Company’s future operating results will largely depend on the magnitude of payments from its
current and potential future corporate collaborators and the progress of drug candidates currently in its
research and development pipeline. The results of the Company’s operations will vary significantly
from year to year and quarter to quarter and depend on, among other factors, the timing of its entry into
new collaborations, if any, the timing of the receipt of payments from new or existing collaborators and
the cost and outcome of any preclinical development or clinical trials then being conducted. The
Company anticipates that existing capital resources at December 31, 2008,
together with the
$6,000,000 to be received from Genentech in the first quarter of 2009 for the initiation of the pivotal
phase II clinical trial in advanced basal cell carcinoma (see Note 16), should enable it to maintain
current and planned operations into mid-2010. The Company’s ability to continue funding its planned
operations is dependent upon, among other things, the success of its collaborations with Genentech, its
ability to control the cash burn rate and its ability to raise additional funds through equity, debt, entry
into new collaborations or other sources of financing.

(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

(a) USE OF ESTIMATES

The preparation of the Company’s consolidated financial statements in conformity with accounting
principles generally accepted in the United States requires management
to make estimates and
assumptions that affect the reported amounts and disclosure of revenue and certain assets and liabilities
at the balance sheet date. Such estimates include the performance obligations under the Company’s
collaboration agreements,
the carrying value of property and
equipment and intangible assets and the value of certain investments and liabilities. Actual results may
differ from such estimates.

the collectibility of receivables,

66

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

(b) CONSOLIDATION

The accompanying consolidated financial statements include the Company and its wholly owned
subsidiaries, Curis Securities Corporation, Inc. and Curis Pharmaceuticals (Shanghai) Co., Ltd., or
Curis Shanghai.

(c) REVENUE RECOGNITION

companies

The Company’s business strategy includes entering into collaborative license and development
and
agreements with biotechnology and pharmaceutical
commercialization of the Company’s product candidates. The terms of the agreements typically include
non-refundable license fees, funding of research and development, payments based upon achievement
of clinical development milestones and royalties on product sales. The Company follows the provisions
of the Securities and Exchange Commission’s Staff Accounting Bulletin (SAB) No. 104 (SAB
No. 104), Revenue Recognition, Emerging Issues Task Force (EITF) Issue No. 00-21 (EITF 00-21),
Accounting for Revenue Arrangements with Multiple Deliverables, EITF Issue No. 99-19 (EITF
99-19), Reporting Revenue Gross as a Principal Versus Net as an Agent, and EITF Issue No. 01-9
(EITF 01-9), Accounting for Consideration Given by a Vendor to a Customer (Including a Reseller of
the Vendor’s Products).

the development

for

License Fees and Multiple Element Arrangements.

Non-refundable license fees are recognized as revenue when the Company has a contractual right to
receive such payment, the contract price is fixed or determinable, the collection of the resulting
receivable is reasonably assured and the Company has no further performance obligations under the
license agreement. Multiple element arrangements, such as license and development arrangements are
analyzed to determine whether the deliverables, which often include a license and performance
obligations such as research and steering committee services, can be separated or whether they must be
accounted for as a single unit of accounting in accordance with EITF 00-21. The Company recognizes
up-front license payments as revenue upon delivery of the license only if the license has stand-alone
value and the fair value of the undelivered performance obligations, typically including research and/or
steering committee services, can be determined. If the fair value of the undelivered performance
obligations can be determined, such obligations would then be accounted for separately as performed.
If the license is considered to either (i) not have stand-alone value or (ii) have stand-alone value but the
fair value of any of the undelivered performance obligations cannot be determined, the arrangement
would then be accounted for as a single unit of accounting and the license payments and payments for
performance obligations are recognized as revenue over the estimated period of when the performance
obligations are performed.

If the Company is involved in a steering committee as part of a multiple element arrangement that is
accounted for as a single unit of accounting, the Company assesses whether its involvement constitutes
a performance obligation or a right to participate. Steering committee services that are determined to be
performance obligations are combined with other research services or performance obligations required
under an arrangement, if any, in determining the level of effort required in an arrangement and the
period over which the Company expects to complete its aggregate performance obligations.

Whenever the Company determines that an arrangement should be accounted for as a single unit of
accounting, it must determine the period over which the performance obligations will be performed and
revenue will be recognized. Revenue will be recognized using either a relative performance or straight-
line method. The Company recognizes revenue using the relative performance method provided that

67

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

the Company can reasonably estimate the level of effort required to complete its performance
obligations under an arrangement and such performance obligations are provided on a best-efforts
basis. Direct labor hours or full-time equivalents are typically used as the measure of performance.
Revenue recognized under the relative performance method would be determined by multiplying the
total payments under the contract, excluding royalties and payments contingent upon achievement of
substantive milestones, by the ratio of level of effort incurred to date to estimated total level of effort
required to complete the Company’s 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 relative performance method, as of each reporting period.

If the Company cannot reasonably estimate the level of effort required to complete its performance
obligations under an arrangement, the performance obligations are provided on a best-efforts basis and
the Company can reasonably estimate when the performance obligation ceases or the remaining
obligations become inconsequential and perfunctory, then the total payments under the arrangement,
excluding royalties and payments contingent upon achievement of substantive milestones, would be
recognized as revenue on a straight-line basis over the period the Company expects to complete its
performance obligations. Revenue is limited to the lesser of the cumulative amount of payments
received or the cumulative amount of revenue earned, as determined using the straight-line basis, as of
the period ending date.

If the Company cannot reasonably estimate when its performance obligation either ceases or becomes
inconsequential and perfunctory, then revenue is deferred until the Company can reasonably estimate
when the performance obligation ceases or becomes inconsequential. Revenue is then recognized over
the remaining estimated period of performance.

Significant management judgment is required in determining the level of effort required under an
arrangement and the period over which the Company is expected to complete its performance
obligations under an arrangement.

Substantive Milestone Payments.

Collaboration agreements may also contain substantive milestone payments. Substantive milestone
payments are considered to be performance bonuses that are recognized upon achievement of the
milestone only if all of the following conditions are met:

•

•

•

•

•

the milestone payments are non-refundable;

achievement of the milestone involves a degree of risk and was not reasonably assured at the
inception of the arrangement;

substantive Company effort is involved in achieving the milestone;

the amount of the milestone payment is reasonable in relation to the effort expended or the risk
associated with achievement of the milestone; and,

a reasonable amount of time passes between the up-front license payment and the first milestone
payment as well as between each subsequent milestone payment.

Determination as to whether a payment meets the aforementioned conditions involves management’s
judgment. If any of these conditions are not met, the resulting payment would not be considered a
substantive milestone, and therefore the resulting payment would be considered part of
the
consideration for the single unit of accounting and would be recognized as revenue as such
performance obligations are performed under either the relative performance or straight-line methods,

68

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

as applicable, and in accordance with these policies as described above. In addition, the determination
that one such payment was not a substantive milestone could prevent the Company from concluding
that subsequent milestone payments were substantive milestones and, as a result, any additional
milestone payments could also be considered part of the consideration for the single unit of accounting
and would be recognized as revenue as such performance obligations are performed under either the
relative performance or straight-line methods, as applicable.

Reimbursement of Costs.

Reimbursement of costs is recognized as revenue provided the provisions of EITF 99-19 are met, the
amounts are determinable and collection of the related receivable is reasonably assured.

Royalty Revenue.

Royalty revenue is recognized upon the sale of the related products, provided that the royalty amounts
are fixed or determinable, collection of the related receivable is reasonably assured and the Company
has no remaining performance obligations under the arrangement. If royalties are received when the
Company has remaining performance obligations, the royalty payments would be attributed to the
services being provided under the arrangement and therefore would be recognized as such performance
obligations are performed under either the relative performance or straight line methods, as applicable,
and in accordance with these policies as described above.

Payments by Curis as a Vendor to a Collaborator as a Customer.

For revenue-generating arrangements where the Company, as a vendor, provides consideration to a
licensor or collaborator, as a customer, the Company applies the provisions of EITF 01-9. A payment
to a customer is presumed to be a reduction of the selling price unless the Company receives an
identifiable benefit for the payment and the Company can reasonably estimate the fair value of the
benefit received. Payments to a customer that are deemed a reduction of selling price are recorded first
as a reduction of revenue, to the extent of both cumulative revenue recorded to-date and of probable
future revenues, which include any unamortized deferred revenue balances, under all arrangements
with such customer and then as an expense. Payments that are not deemed to be a reduction of selling
price would be recorded as an expense.

Deferred Revenue.

Amounts received prior to satisfying the above revenue recognition criteria would be recorded as
deferred revenue in the accompanying consolidated balance sheets. Amounts not expected to be
recognized during the year ending December 31, 2008 would be classified as long-term deferred
revenue. As of December 31, 2008, the Company had no remaining short- or long-term deferred
revenue.

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

Summary.

During the years ended December 31, 2008, 2007 and 2006, total gross revenues from major customers
as a percent of total gross revenues of the Company were as follows:

Year Ended December 31,

2008

2007

2006

75% 76% 56%
Genentech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4% 12% 16%
Wyeth Pharmaceuticals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21% —% —%
Stryker Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7%
Spinal Muscular Atrophy Foundation . . . . . . . . . . . . . . . . . . . . . . . . —% —%
Procter & Gamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —% 11%
5%
Micromet AG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —% —% 14%
2%
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —% —%
Centocor

(d) RESEARCH AND DEVELOPMENT

Research and development costs, including internal and external costs, are charged to operations as
incurred. Research and development costs include personnel costs, lab supplies, outside services
including clinical research organizations, medicinal chemistry, consulting agreements, allocations of
facility costs and fringe benefits, and other costs.

(e) CASH EQUIVALENTS, MARKETABLE SECURITIES AND LONG-TERM INVESTMENTS

Cash equivalents consist of short-term, highly liquid investments purchased with maturities of three
months or less. All other liquid investments are classified as marketable securities. In accordance with
Statement of Financial Accounting Standards (SFAS) No. 115, Accounting for Certain Investments in
Debt and Equity Securities, all of the Company’s marketable securities have been designated as
available-for-sale and are stated at market value with any unrealized holding gains or losses included as
a component of stockholders’ equity and any realized gains and losses recorded in the statement of
operations in the period the securities are sold.

The amortized cost, unrealized gains and fair value of marketable securities available-for-sale as of
December 31, 2008, with maturity dates ranging between one and twelve months and with a weighted
average maturity of 3.3 months are as follows:

U.S. Government obligations . . . . . . . . . . . . . . .
Corporate bonds and notes . . . . . . . . . . . . . . . . .

$ 9,449,000
9,157,000

$50,000
38,000

$ 9,499,000
9,195,000

Total marketable securities . . . . . . . . . . . . . . . . .

$18,606,000

$88,000

$18,694,000

Amortized
Cost

Unrealized
Gain

Fair Value

The amortized cost, unrealized gains and fair value of marketable securities available-for-sale as of
December 31, 2007, with maturity dates ranging between one and 12 months and with a weighted
average maturity of 3.8 months are as follows:

Corporate bonds and notes . . . . . . . . . . . . . . . . .

$23,979,000

$84,000

$24,063,000

Total marketable securities . . . . . . . . . . . . . . . . .

$23,979,000

$84,000

$24,063,000

Amortized
Cost

Unrealized
Gain

Fair Value

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

The Company has a restricted long-term investment in the amount of $210,000 at December 31, 2008
and 2007. This restricted long-term investment is comprised of a certificate of deposit pledged as
collateral in connection with a facility lease agreement. The restriction expires on December 31, 2010
unless the Company elects to extend its lease. The Company had no other long-term investments as of
December 31, 2008 or 2007.

(f) FAIR VALUE OF FINANCIAL INSTRUMENTS

On January 1, 2008, the Company adopted Statement of Financial Accounting Standards (SFAS)
No. 157, Fair Value Measurements, (SFAS No. 157) for its financial assets and liabilities. The
adoption of SFAS No. 157 has not had a material impact on the Company’s financial position or results
of operations. As permitted by FASB Staff Position No. FAS 157-2, Effective Date of FASB Statement
No. 157, the Company elected to defer the adoption of SFAS No. 157 for all nonfinancial assets and
nonfinancial liabilities, except those that are recognized or disclosed at fair value in the financial
statements on a recurring basis, until January 1, 2009. SFAS No. 159, The Fair Value Option for
Financial Assets and Financial Liabilities Including an Amendment of FASB Statement No. 115,
(SFAS No. 159) became effective January 1, 2008 and permits entities to choose to measure many
financial instruments and certain other items at fair value that are not currently required to be measured
at fair value. The Company did not elect to adopt the fair value option for eligible financial instruments
under SFAS No. 159.

SFAS No. 157 provides a framework for measuring fair value under U.S. GAAP and requires expanded
disclosures regarding fair value measurements. SFAS No. 157 defines fair value as the exchange price
that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most
advantageous market for the asset or liability in an orderly transaction between market participants on
the measurement date. Market participants are buyers and sellers in the principal market that are
(i) independent, (ii) knowledgeable, (iii) able to transact, and (iv) willing to transact.

SFAS No. 157 requires the use of valuation techniques that are consistent with the market approach,
the income approach and/or the cost approach. The market approach uses prices and other relevant
information generated by market transactions involving identical or comparable assets and liabilities.
The income approach uses valuation techniques to convert future amounts, such as cash flows or
earnings, to a single present amount on a discounted basis. The cost approach is based on the amount
that currently would be required to replace the service capacity of an asset (replacement cost).
Valuation techniques should be consistently applied. SFAS No. 157 also establishes a fair value
hierarchy which requires an entity to maximize the use of observable inputs, where available, and
minimize the use of unobservable inputs when measuring fair value. The standard describes three
levels of inputs that may be used to measure fair value:

Level 1 Quoted prices in active markets for identical assets or liabilities. The Company’s Level 1 assets include
cash and cash equivalents, investments in marketable securities, and a long-term restricted investment.
As of December 31, 2008, the Company held cash equivalents and marketable securities of $8,967,000
and $18,694,000, respectively. The Company’s marketable securities are investments with expected
maturities of greater than three months, but less than twelve months, and consist of commercial paper,
corporate debt securities, and government obligations. These amounts are invested directly in
commercial paper of financial institutions and corporations with A-/Aa3 or better long-term ratings and
A-1/P-1 short term debt ratings, U.S. Treasury securities, U.S. Treasury money market funds and
interest bearing bank accounts.

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

Level 2

Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities;
quoted prices in markets that are not active; or other inputs that are observable or can be corroborated
by observable market data for substantially the full term of the assets or liabilities. The Company has
no Level 2 assets or liabilities at December 31, 2008.

Level 3

Unobservable inputs that are supported by little or no market activity and that are significant to the
fair value of the assets or liabilities. The Company has no material Level 3 assets or liabilities at
December 31, 2008.

(g) LONG-LIVED ASSETS OTHER THAN GOODWILL

Long-lived assets other than goodwill consist of property and equipment and long-term deposits. The
aggregate balances for these long-lived assets were $1,666,000 and $2,796,000 as of December 31,
2008 and 2007, respectively. The Company applies SFAS No. 144, Accounting for the Impairment or
Disposal of Long-Lived Assets. If it were determined that the carrying value of the Company’s other
long-lived assets might not be recoverable based upon the existence of one or more indicators of
impairment, the Company would measure an impairment based on application of SFAS No. 144 (see
Note 6). During the years ended December 31, 2008, 2007 and 2006, the Company recognized an
impairment charge of $191,000, $352,000 and $148,000, respectively, related to certain equipment
with no current or planned future use.

Purchased equipment is recorded at cost. The Company does not currently hold any leased equipment.
Depreciation and amortization are provided on the straight-line method over the estimated useful lives
of the related assets or the remaining terms of the leases, whichever is shorter, as follows:

Asset Classification

Laboratory equipment, computers and software
Leasehold improvements

Office furniture and equipment

Estimated Useful Life

3-5 years
Lesser of life of the lease or the
life of the asset
5 years

(h) GOODWILL

As of December 31, 2008 and 2007, the Company had recorded goodwill of $8,982,000. Effective
January 1, 2002, the Company applied the provisions of SFAS No. 142, Goodwill and Other Intangible
Assets. During each of December 2008, 2007 and 2006, the Company completed its annual goodwill
impairment tests and determined that the Company represented a single reporting unit under SFAS 142
and as of those dates the fair value of the Company exceeded the carrying value of its net assets.
Accordingly, no goodwill impairment was recognized for the years ended December 31, 2008, 2007
and 2006.

(i) TREASURY STOCK

On May 31, 2002, the Company announced that its Board of Directors had approved the repurchase of
up to $3,000,000 of the Company’s common stock. Such purchases can be made from time to time, at
the discretion of certain members of the Company’s management. The Company accounts for its
common stock repurchases as treasury stock under the cost method. The repurchased stock provides the
Company with treasury shares for general corporate purposes, such as stock to be issued under
employee stock option and stock purchase plans. In 2002, the Company repurchased 1,047,707 shares
of its common stock at a cost of $891,000 pursuant to this repurchase program. The Company has not
purchased any shares since 2002.

72

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

(j) BASIC AND DILUTED LOSS PER COMMON SHARE

The Company applies SFAS No. 128, Earnings per Share, which establishes standards for computing
and presenting earnings per share. Basic and diluted net losses per share were determined by dividing
net loss by the weighted average common shares outstanding during the period. Diluted net loss per
common share is the same as basic net loss per common share for all periods presented, as the effect of
the potential common stock equivalents is antidilutive due to the Company’s net loss position for all
periods presented. Antidilutive securities consist of stock options, warrants and shares issuable under
the Company’s 2000 Employee Stock Purchase Plan; all of which are weighted based on the number of
days outstanding during the respective reporting period. Antidilutive securities were 15,887,602,
15,371,793 and 9,561,899 as of December 31, 2008, 2007 and 2006, respectively, consisting of the
following:

For the years ended December 31,

2008

2007

2006

Stock options outstanding . . . . . . . . . . . . . . . . . . .
Warrants outstanding . . . . . . . . . . . . . . . . . . . . . . .
Shares issuable under ESPP . . . . . . . . . . . . . . . . .

9,861,811
5,987,338
38,453

8,969,102
6,399,271
3,420

7,913,407
1,630,976
17,516

Total antidilutive securities . . . . . . . . . . . . . . . . . .

15,887,602

15,371,793

9,561,899

(k) STOCK-BASED COMPENSATION

On January 1, 2006, the Company adopted Statement of Financial Accounting Standards (SFAS)
No. 123 (revised 2004), Share-Based Payment (SFAS 123(R)), which establishes standards for the
accounting of transactions in which an entity exchanges its equity instruments for goods or services.
SFAS 123(R) focuses primarily on accounting for transactions in which an entity obtains employee
services in share-based payment transactions. SFAS 123(R) requires that the fair value of such equity
instruments be recognized as an expense in the financial statements as services are performed.

The Company adopted SFAS 123(R) using the modified-prospective-transition method. Under that
transition method, compensation cost recognized for the years ended December 31, 2008, 2007 and
2006 includes (i) compensation cost for all share-based payments granted prior to January 1, 2006, but
not yet vested at that date, based on the grant-date fair value estimated in accordance with the original
provisions of SFAS 123; and (ii) compensation cost for all share-based payments granted subsequent to
January 1, 2006, based on the grant-date fair value estimated in accordance with the provisions of
SFAS 123(R).

(l) OPERATING LEASES

As of December 31, 2008, the Company has one facility located at 45 Moulton Street in Cambridge,
Massachusetts under a noncancellable operating lease agreement for office and laboratory space. The
rent payments for this facility escalate over the lease term and the Company expenses its obligations
under this lease agreement on a straight-line basis over the term of the lease (see Note 9(a)).

(m) NEW ACCOUNTING PRONOUNCEMENTS

(SFAS
In December 2007,
No. 141(R)). SFAS No. 141(R) establishes principles and requirements for how an acquirer recognizes

the FASB issued SFAS No. 141(R), Business Combinations

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

and measures in its financial statements the identifiable assets acquired, the liabilities assumed, any
noncontrolling interest in the acquiree and the goodwill acquired. SFAS No. 141(R) also establishes
disclosure requirements to enable the evaluation of the nature and financial effects of the business
combination. SFAS No. 141(R) is effective for fiscal years beginning after December 15, 2008. SFAS
No. 141(R) will have an impact on the Company’s financial statements if it is involved in a business
combination that occurs after January 1, 2009.

In December 2007, the EITF issued Issue No. 07-1, Accounting for Collaborative Arrangements (EITF
Issue No. 07-1). This Issue is effective for financial statements issued for fiscal years beginning after
December 15, 2008, and interim periods within those fiscal years, and shall be applied retrospectively
to all prior periods presented for all collaborative arrangements existing as of the effective date that
include a joint operating activity (i.e., co-development) and that are operated as a “virtual joint
venture.” This Issue includes enhanced disclosure requirements regarding the nature and purpose of the
arrangement, rights and obligations under the arrangement, accounting policy, amount and income
statement classification of collaboration transactions between the parties. This Issue also requires that
transactions with third parties (i.e., parties that do not participate in the collaborative arrangement)
should be reported in the appropriate line item in each company’s financial statement pursuant to the
guidance in EITF Issue No. 99-19, Reporting Revenue Gross as a Principal versus Net as an Agent.
The Company has historically entered into collaborative arrangements in which this Issue would be
applicable; however, the Company does not expect the adoption of EITF 07-1 to have a material impact
on its consolidated financial statements as it relates to joint operating activities under current
collaborations. The Company will have to evaluate the impact of this Issue on future collaborations that
the Company may enter into.

(3) RESEARCH AND DEVELOPMENT COLLABORATIONS

(a) GENENTECH, INC. JUNE 2003 COLLABORATION

(i) Agreement Summary

In June 2003, the Company licensed its proprietary Hedgehog pathway technologies to Genentech for
human therapeutic use. The primary focus of the collaborative research plan has been to develop
molecules that inhibit the Hedgehog pathway for the treatment of various cancers. The collaboration
consists of two programs:
the development of a small molecule Hedgehog pathway inhibitor
formulated for the topical treatment for basal cell carcinoma; and the development of systemically
administered small molecule and antibody Hedgehog pathway inhibitors for the treatment of certain
other solid tumor cancers. Under this second program, Genentech is currently conducting three clinical
trials with GDC-0449, the lead molecule from the systemically administered Hedgehog pathway
inhibitor program.

Pursuant to the agreement, Genentech made an up-front payment of $8,500,000, which consisted of a
$3,509,000 non-refundable license fee payment and $4,991,000 in exchange for shares of the
Company’s common stock. Genentech also made license maintenance fee payments totaling
$4,000,000 over the first two years of the collaboration and agreed to pay additional contingent cash,
assuming specified clinical development and regulatory approval objectives are met. To date, the
Company has received a total of $12,000,000 in such contingent cash payments for the achievement of
development objectives under the agreement (see Note 16). In addition, Genentech agreed to pay a
royalty on potential future net product sales, which increases with increasing sales volume.

As a result of its licensing agreements with various universities, the Company is obligated to make
payments to these university licensors when certain payments are received from Genentech. As of

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

December 31, 2008, we have incurred aggregate expenses of $600,000 in connection with the
Company’s receipt of contingent cash payments from Genentech related to such licensing agreements.

The collaboration agreement provides the Company with the option to co-develop topically
administered Hedgehog pathway inhibitor products in the field of basal cell carcinoma in the U.S. In
January 2005, the Company exercised this co-development option and, until August 31, 2006, the
Company shared equally in the U.S. development costs of this product candidate. Development of this
topically administered basal cell carcinoma product candidate was governed by a co-development
steering committee. The co-development steering committee terminated when the parties ended the
co-development arrangement. In July 2006, the Company and Genentech elected to halt clinical
development of this product candidate. Effective August 31, 2006, the Company elected to cease its
co-development participation and Genentech became solely responsible for all future costs and
development decisions regarding this program. Since the termination of
its co-development
participation, the Company has not incurred any additional co-development or internal costs for a
topically administered basal cell carcinoma product candidate. Should Genentech determine to develop
a topically administered Hedgehog pathway inhibitor for the treatment of basal cell carcinoma, the
Company would be eligible for cash payments on the achievement of certain future clinical
development objectives as well as a royalty on future product sales, if any.

In addition to the co-development of a topically administered Hedgehog pathway inhibitor product in the
field of basal cell carcinoma, the collaboration provides for the development of systemically administered
small molecule and antibody Hedgehog pathway inhibitors for the treatment of cancer. The development
of these programs is governed by a joint steering committee which is comprised of an equal number of
representatives from both the Company and Genentech to oversee the research, development and
commercialization and other efforts around these programs. Each member of the joint steering committee
receives the right to cast one vote, but Genentech has the final decision making authority in most matters.
The joint steering committee was required to meet on at least a quarterly basis until the filing of the first
investigational new drug, or IND, application for a Hedgehog pathway inhibitor product candidate, which
occurred in October 2006. After such filing, the joint steering committee shall meet as often as it deems
necessary or at least semi-annually and shall exist as long as any compound under the collaboration is
being developed or commercialized in accordance with the contract terms.

Unless terminated earlier, the agreement shall expire six months after the later of the expiration of
Genentech’s obligation to pay royalties to the Company under the agreement or such time as no
activities have occurred under the agreement for a period of twelve months. Early termination
provisions are as follows:

(i) Either the Company or Genentech may terminate the agreement upon sixty days written notice for
cause upon either the occurrence of bankruptcy, insolvency, dissolution, winding up, or upon the
breach of any material provision of this agreement by the other party, provided such breach is not
cured by the other party within the sixty day period following written notice of termination by the
other party.

(ii)

If Genentech terminates the agreement for cause, all licenses granted by Genentech to the
Company automatically terminate and revert to Genentech and specified licenses granted by Curis
to Genentech shall survive so long as Genentech is not then in breach under the Agreement. The
consideration for any product that the Company shares gross profits and losses with Genentech
through a co-development structure (i.e., the basal cell carcinoma product candidate) will be
modified so that the Company will no longer receive its share of gross profits and losses. The
Company will instead receive clinical development and drug approval milestones and royalties on
product sales for such product.

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

(iii) If the Company terminates the agreement for cause or Genentech terminates the agreement
without cause, all licenses granted by the Company to Genentech automatically terminate and
revert to the Company and specified licenses granted by Genentech to the Company shall survive
so long as the Company is not then in breach under the Agreement. At the time of such
termination, Genentech shall no longer conduct any development or commercialization activities
on any compounds identified during the course of the agreement for so long as such compounds
continue to be covered by valid patent claims.

(ii) Accounting Summary

The Company considers its June 2003 arrangement with Genentech to be a revenue arrangement with
multiple deliverables. The Company’s deliverables under this collaboration include an exclusive
license to its Hedgehog pathway inhibitor technologies, research and development services for the first
two years of the collaboration, and participation on both the joint steering committee and the
co-development steering committee. The Company applied the provisions of EITF 00-21 to determine
whether the performance obligations under this collaboration could be accounted for separately or
should be accounted for as a single unit of accounting. The Company determined that the deliverables,
specifically, the license, research and development services and steering committee participation,
represented a single unit of accounting because the Company believes that the license, although
delivered at the inception of the arrangement, did not have stand-alone value to Genentech without the
Company’s research and development services and steering committee participation. In addition,
objective and reliable evidence of the fair value of the Company’s research and development services
and steering committee participation could not be determined.

The Company attributed the $3,509,000 up-front fee and the $4,000,000 of maintenance fees to the
undelivered research and development services and steering committee participation. The Company did
not consider the $4,000,000 in maintenance fees to be substantive milestone payments because receipt
of the maintenance fee payments did not meet each of the criteria set forth in the Company’s revenue
recognition policy related to substantive milestones (see Note 2(c)).

As of December 31, 2006, the Company had completed the delivery of (i) the license, (ii) the research
and development services and (iii) its participation on the co-development steering committee.
Therefore, as of December 31, 2006, the Company’s sole remaining performance obligation under this
collaboration consisted of participation on the joint steering committee. The agreement provides that
the joint steering committee shall exist for so long as any compound subject to this collaboration is
being developed or commercialized by either of the parties. As of December 31, 2006, the Company
had deferred the $7,509,000 in up-front license fee and maintenance fee payments because, at that time,
it could not reasonably estimate the period of performance of its steering committee obligation or when
the steering committee obligation would become inconsequential or perfunctory.

Since submission of the IND application in October 2006, Genentech has independently pursued further
clinical development of a lead compound and has not sought to involve the Company in the development
of the systemically administered small molecule and antibody Hedgehog pathway inhibitor research and
development efforts, all of which are being conducted exclusively by Genentech. Further, the Company
terminated all internal research activities involving Hedgehog pathway inhibitors immediately upon the
conclusion of the research funding in December 2006. Genentech manages all aspects of research and
development of Hedgehog pathway inhibitors covered by this collaboration. Genentech designed,
enrolled and continues to manage all aspects of the ongoing clinical trials of GDC-0449. The Company
has not been involved in the development of this program subsequent to the IND submission in October
2006 and expects that it will not be involved in the development plans in the future.

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

During the fourth quarter of 2007, in consideration of Genentech’s development progress without
assistance from the Company, including limited participation by either party on the joint steering
committee in 2007, the Company reassessed its participation on the joint steering committee. As a
result of this reassessment, the Company concluded that its participation in the joint steering committee
had become inconsequential and perfunctory. Specifically, the Company believes that its participation
on the joint steering committee is no longer essential to the current or future development of Hedgehog
pathway inhibitor compounds under collaboration with Genentech, and the fair value or cost, if any, of
completing the Company’s obligation is insignificant in relation to the non-refundable up-front license
fee and maintenance payments received from Genentech that have been allocated to the single unit of
accounting. As a result, the Company recorded the $7,509,000 in up-front license fee and maintenance
fee payments as license revenues for the year ended December 31, 2007.

In October 2006, Genentech filed an IND application with the FDA to initiate Phase I clinical testing of
GDC-0449 for the treatment of cancer, which triggered a contingent cash payment of $3,000,000 by
Genentech. The Company has recorded this amount as revenue in “Substantive milestones” in the
Revenues section of its Consolidated Statement of Operations for the year ended December 31, 2006
since the successful achievement of these objectives met each of the criteria set forth in the Company’s
revenue recognition policy related to substantive milestones.

In 2007, the Company received a payment of $3,000,000 from Genentech and, in 2008, the Company
received additional payments totaling $6,000,000 from Genentech upon the achievement of Phase II
clinical development objectives under the agreement. These payments did not meet the criteria to be
classified as substantive milestones, and, therefore, the Company has recorded these amounts as
revenue within “License Fees” in the Revenues section of its Consolidated Statement of Operations for
the years ended December 31, 2008 and 2007, respectively as the Company did not have any further
performance obligations under the collaboration. During the years ended December 31, 2008, 2007 and
2006, the Company also recorded revenue within “Research and development contracts” of $282,000,
$322,000 and $202,000, respectively, as revenue related to expenses incurred on behalf of Genentech
that were paid by the Company and for which Genentech is obligated to reimburse the Company. The
Company will continue to recognize revenue for expense reimbursement as such reimbursable
expenses are incurred, provided that the provisions of EITF 99-19 are met. As of December 31, 2008,
the Company had recorded $104,000 as amounts receivable from Genentech under this collaboration in
“Accounts receivable” in the Company’s Current Assets section of its Consolidated Balance Sheets.

The Company’s right to co-develop the Hedgehog pathway inhibitor products in the field of basal cell
carcinoma was not considered a deliverable under EITF 00-21, was exercisable only at the Company’s
option and, therefore, did not impact the initial accounting for this arrangement. As a result of the
Company’s decision to exercise its right to co-development the basal cell carcinoma product candidate,
the Company made significant cash payments to Genentech through August 31, 2006, which is the date
the Company ceased its participation in co-development. As of August 31, 2006, Genentech is solely
responsible for all future costs and development decisions regarding the basal cell carcinoma program.
The Company has recorded $1,728,000 in co-development payments to Genentech for the year ended
December 31, 2006 as contra-revenues in its Consolidated Statement of Operations. The Company
does not expect to incur any additional costs related to co-development of this drug candidate.

(b) GENENTECH, INC. APRIL 2005 AGREEMENT

(i) Agreement Summary

Effective April 11, 2005, the Company entered into a second amendment to its June 2003 agreement
with Genentech. Under the terms of the amendment, Genentech agreed to provide the Company with

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

up to $2,000,000 of funding to continue development of therapeutics to treat solid tumor cancers, and
the research term was extended from June 11, 2005 to December 11, 2005, at which time the
$2,000,000 was paid. At Genentech’s option, the research term would be extended for an additional
six-month period to June 11, 2006, upon written notice delivered to the Company by October 2005.
Genentech notified the Company in October 2005 of its decision to extend the research term, and
agreed to fund up to ten Curis full-time equivalents through June 11, 2006. Genentech paid the
Company $1,250,000 in June 2006. Other than the change to the period of the research term and
payments associated with such research, the amendment did not change the terms of the June 2003
agreement, which remains in full force and effect.

(ii) Accounting Summary

The Company considered the provisions of EITF 00-21 and determined that this agreement is a separate
contract from its June 2003 agreement, and a previous amendment entered into between the Company and
Genentech in December 2004, since it was not contemplated at the time of the June 2003 arrangement,
was separately negotiated in order to increase the number of full-time equivalent providing research and
development services and to provide xenograft tumor samples to Genentech, and was not entered into at
or near the time of the June 2003 agreement. The Company’s performance obligations under this
agreement were to provide research services and xenograft tumor samples to Genentech through June 11,
2006. Since Genentech elected to exercise its option and extend the research services, the Company’s
performance obligations extended for an additional period from December 2005 through June 2006. The
Company has applied the provisions of SAB No. 104 and recognized the research funding as revenues
under this collaboration as such research services were performed. The amount payable to the Company
and, accordingly, the amount of revenue recognized was based on the actual number of full-time
equivalents providing research services under this agreement through June 2006. During the year ended
December 31, 2006, the Company recorded $898,000 related to its research and development services
under this agreement as revenue in “Research and development contracts” in the Company’s Revenues
section of its Consolidated Statement of Operations. No revenues were recognized under this agreement
with Genentech in 2007 or 2008. As of December 31, 2008, the Company had no amounts receivable
from Genentech under this collaboration in “Accounts receivable” in the Company’s Current Assets
section of its Consolidated Balance Sheets.

(c) GENENTECH, INC. MAY 2006 AGREEMENT

(i) Agreement Summary

the Company entered into a third amendment

In May 2006,
to its June 2003 agreement with
Genentech. The May 2006 amendment, effective from June 12, 2006 to December 11, 2006, provided
for up to seven of the Company’s full-time equivalent researchers to provide research and development
services, in exchange for up to an additional $918,750, payable quarterly in advance. The agreement
also provided Genentech with the option to request that the Company provide up to seven full-time
equivalent researchers to perform research services during the period of December 12, 2006 until
June 11, 2007. Genentech did not exercise this option, and funding for research services on this
program ceased on December 11, 2006.

(ii) Accounting Summary

The Company considered the provisions of EITF 00-21 and determined that this agreement is a
separate contract from its June 2003 agreement, and previous amendments entered into between the

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

Company and Genentech in December 2004 and April 2005, since it was not contemplated at the time
of the June 2003 arrangement, was separately negotiated in order to extend the term in which full-time
equivalents would provide research and development services and to provide xenograft tumor samples
to Genentech, and was not entered into at or near the time of the June 2003 agreement. The Company’s
performance obligations under this agreement were to provide research services and xenograft tumor
samples to Genentech through December 11, 2006. The Company applied the provisions of SAB
No. 104 and recognized the research funding as revenues under this collaboration as such research
services were performed. The amount payable to the Company and, accordingly, the amount of revenue
recognized was based on the actual number of full-time equivalents providing research services under
this agreement through December 2006. During the year ended December 31, 2006, the Company
recorded $842,000 related to its research and development services under this agreement as revenue in
“Research and development contracts” in the Company’s Revenues section of its Consolidated
Statement of Operations. No revenues were recognized under this agreement with Genentech in 2008
or 2007. As of December 31, 2008, the Company had no amounts receivable from Genentech under
this collaboration.

(d) GENENTECH APRIL 2005 WNT DRUG DISCOVERY COLLABORATION

(i) Collaboration Summary

On April 1, 2005, the Company entered into a drug discovery collaboration agreement with Genentech
for the discovery and development of small molecule compounds that modulate the Wnt signaling
pathway. This pathway is believed to play an important role in cell proliferation and is a regulator of
tissue formation and repair, the abnormal activation of which is associated with certain cancers. Under
the terms of the agreement, the Company has granted Genentech an exclusive, royalty-bearing license
to make, use and sell the small molecule compounds that are modulators of the pathway. Curis has
retained the rights for ex vivo cell therapy, except in the areas of oncology and hematopoiesis.

that may result

Under the terms of the agreement,
the Company had primary responsibility for research and
development activities through March 2007 and Genentech is primarily responsible for clinical
development, manufacturing, and commercialization of products
from the
collaboration. Genentech paid the Company an up-front license fee of $3,000,000 and paid the
Company $5,270,000 for research and development activities during the initial two-year research term.
Genentech will also make cash payments to the Company that are contingent upon the successful
achievement of certain preclinical and clinical development objectives and drug approval objectives.
Genentech had an option to extend the initial two-year research term for up to two additional years in
one-year increments. In January 2007, Genentech informed the Company that it would not extend the
research term beyond the initial two-year term ending on March 31, 2007. Genentech will also pay the
Company royalties on net product sales if product candidates derived from the collaboration are
If Genentech does not advance drug candidates generated under this
successfully developed.
collaboration beyond the discovery research stage, the Company is not entitled to receive any future
cash payments under this collaboration. The Company can not predict whether Genentech will pursue
the further development of drug candidates under the agreement and/or whether any development
objectives for which the Company may be entitled to a cash payment will be achieved.

(ii) Accounting Summary

The Company considers this arrangement with Genentech to be a revenue arrangement with multiple
deliverables. The Company’s deliverables under this collaboration include an exclusive license to its
technologies in this signaling pathway and certain performance obligations, including research services

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

for at least two years and participation on a steering committee. The Company applied the provisions of
EITF 00-21 to determine whether the performance obligations under this collaboration can be
accounted for separately or as a single unit or multiple units of accounting. The Company determined
that these deliverables represented a single unit of accounting, since the Company believes that the
license does not have stand-alone value to Genentech without the Company’s research services and
steering committee participation during certain phases of research and because objective and reliable
evidence of the fair value of the Company’s research and steering committee participation could not be
determined.

The Company’s performance obligations under this collaboration consist of participation on a steering
committee and the performance of research services. Because the Company believed that it could
reasonably estimate its level of effort over the term of the arrangement, the Company accounted for the
arrangement under the relative performance method. In developing its original estimate of the
Company’s level of effort required to complete its performance obligations, the Company estimated
that Genentech would elect twice to extend the research service period and related funding, each in
one-year increments, although there was no assurance Genentech would make such an election. The
Company originally estimated that it would provide an equal number of full-time equivalents for the
four-year research and development service term. In developing this estimate, the Company assumed
that Genentech would maintain its initially elected number of twelve full-time equivalent researchers
throughout the four-year period. The steering committee effort was also expected to be consistent over
the four-year period. The $3,000,000 up-front fee plus $12,000,000, the total amount of research
funding which the Company would be entitled to for providing twelve full-time equivalents at
$250,000 each over four years, was being attributed to the research services.

As a result of Genentech’s decision not to extend the research term, the Company’s estimated
performance period was changed during the fourth quarter of 2006 to coincide with the March 31, 2007
research term end date, and the Company accelerated amortization of the unamortized up-front license
fee and the remaining amount of research funding to which the Company was entitled. Revenue for the
period April 1, 2005 through September 30, 2006 was being recognized as the research services were
provided assuming a four-year term through March 2009 at a rate of $312,500 per full-time equivalent.
Revenue for the period October 1, 2006 through March 31, 2007 was recognized as the research
services were provided at a rate of $562,500 per full-time equivalent, which includes the effects of
accelerating the unamortized up-front license fee.

The Company recorded revenue under this collaboration of $1,577,000 and $4,316,000 during the
years ended December 31, 2007 and 2006, respectively. Of this amount, approximately $938,000 and
$1,500,000 was attributed to the amortization of the up-front license fee and is included in “License
fees” within the Revenue section of the Company’s Consolidated Statement of Operations for the years
ended December 31, 2007 and 2006, respectively. In addition, the Company recorded $639,000 and
$2,811,000 related to research services performed by the Company’s full-time equivalent researchers
for the years ended December 31, 2007 and 2006, respectively, and is included within “Research and
development contracts” within the Revenues section of the Company’s Consolidated Statement of
Operations. During the year ended December 31, 2006, the Company also recorded revenue within
“Research and development contracts” of $5,000 as revenue related to expenses incurred on behalf of
Genentech that were paid by the Company and for which Genentech is obligated to reimburse the
Company. No revenues were recognized under this agreement with Genentech in 2008.

The Company believes that contingent payments tied to preclinical, clinical development and drug
approval objectives under this collaboration would not constitute substantive milestones since the
successful achievement of these objectives would not meet each of the criteria set forth in the

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

Company’s revenue recognition policy related to substantive milestones. For any future contingent
payments received by the Company, the Company would have no future deliverables under the
agreement because its performance period ended on March 31, 2007. The Company therefore expects
that it would record any such contingent payments as revenue in “License Fees” in the Company’s
Revenues section of its Consolidated Statement of Operations when the milestones are met.

As of December 31, 2006, the Company had provided cash consideration to Genentech in the form of
co-development payments for the Company’s equal share of U.S. development costs of a basal cell
carcinoma product candidate that is being developed under a separate collaboration with Genentech.
Effective August 31, 2006, the Company elected to cease its participation in the co-development of this
drug candidate and, as of August 31, 2006, Genentech will be solely responsible for all future costs and
development decisions regarding the basal cell carcinoma program. As of December 31, 2008, the
Company had no amounts receivable from Genentech under this collaboration.

(e) STRYKER

On December 27, 2007, the Company completed a transaction with Stryker, under the terms of which
Stryker paid the Company $1,750,000 in cash in exchange for the sale and assignment of all of the
Company’s remaining BMP assets. As a result of the transaction, Stryker assumed all future costs
subsequent to the December 27, 2007 effective date related to maintenance and prosecution of the
patent portfolio. As of December 31, 2007, the Company recorded the $1,750,000 received as short-
term deferred revenue because the Company had not delivered all of the assets to Stryker as required
by the agreement as of that date. The Company completed the transfer of all assets during the first
quarter of 2008, at which time no material ongoing performance obligations remained under the
agreement. Accordingly, the Company recorded $1,750,000 as license revenue within the Revenues
section of the Consolidated Statement of Operations for the year ended December 31, 2008.

Under the terms of the agreement, the Company is entitled to contingent cash payments related to
certain clinical development and sales objectives, if achieved. The Company believes that these
contingent payments would not constitute substantive milestones since the successful achievement of
these objectives would not meet each of the criteria set forth in the Company’s revenue recognition
policy related to substantive milestones. Accordingly, the Company would recognize such contingent
payments as revenue in “License Fees” in the Company’s Revenues section of its Consolidated
Statement of Operations when the milestones are met because the Company would has no future
deliverables under the agreement.

In connection with its transaction with Stryker, the Company entered into a separate agreement in
December 2007 with a former collaborator, to which the Company had previously licensed a portion of
its BMP technology. In exchange for the rights to transfer the licensed technology to Stryker and to
place previously agreed-upon financial consideration under such transfer, the Company was obligated
to make a one-time payment of $750,000 to the former collaborator, which has been recorded in
“Research and Development” line item of the Costs and Expenses section of the Company’s
Consolidated Statement of Operations for the year ended December 31, 2007. In connection with its
receipt of any contingent payments from Stryker, the Company would also be required to make
payments of up to $14,000,000 to this former third-party collaborator if such payments are made for
product candidates or products that are designed to treat certain indications affecting chronic kidney
disease patients.

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

(4) FORMER COLLABORATIONS

(a) WYETH PHARMACEUTICALS

(i) Agreement Summary

On January 12, 2004, the Company licensed its Hedgehog proteins and small molecule Hedgehog
pathway agonists to Wyeth Pharmaceuticals, or Wyeth, for therapeutic applications in the treatment of
neurological and other disorders. Pursuant to the collaboration agreement, Wyeth agreed to make
specified cash payments, including up-front payments of $3,000,000, which consisted of a $1,362,000
non-refundable license fee payment and $1,638,000 in exchange for 315,524 shares of the Company’s
common stock.

On May 6, 2008 the agreement terminated. On the termination date, the licenses granted by the
Company to Wyeth terminated and all terminated license rights reverted to the Company.

In addition, as part of a termination agreement entered into between the Company and Elan
Corporation, the Company paid Elan royalty payments related to any revenues in excess of the first
$1,500,000 received by the Company from Wyeth, other
than revenues received as direct
reimbursement for research, development and other expenses that the Company receive from Wyeth.
The Company was also obligated to make payments to various university licensors when certain
payments were received from Wyeth. These obligations totaled $163,000 in payments to Elan and
university licensors for the up-front license fee and substantive milestone payment received through
December 31, 2008.

(ii) Accounting Summary

The Company considered its arrangement with Wyeth to be a revenue arrangement with multiple
this
deliverables, or performance obligations. The Company’s performance obligations under
collaboration included an exclusive license to its Hedgehog agonist technologies and performing
services, including research and development services for at least two years and participation on a
steering committee. The Company applied the provisions of EITF 00-21 to determine whether the
performance obligations under this collaboration could be accounted for separately or as a single unit
or multiple units of accounting. The Company determined that
these performance obligations
represented a single unit of accounting, research and steering committee services, since the Company
believed that the license did not have stand-alone value to Wyeth without its research services and
steering committee participation and because objective and reliable evidence of the fair value of the
Company’s research and steering committee participation could not be determined.

The Company’s ongoing performance obligations under this collaboration consisted of participation on
a steering committee and the performance of research services. Because the Company believed that it
could reasonably estimate its level of effort over the term of the arrangement, the Company accounted
for the arrangement under the relative performance method. In developing its original estimate of the
Company’s level of effort required to complete its performance obligations, the Company estimated
that Wyeth would elect twice to extend the research and development service period and related
funding, each in one-year increments, for a total of four years. The agreement provided for a one-year
evaluation period immediately following the end of the research term, during which time the Company
could have been obligated to serve on the steering committee and could have been required, at Wyeth’s
expense, to perform additional research and development services. The Company originally estimated
it would provide an equal number of full-time equivalents for the four-year research and
that
the
development service term plus the one-year evaluation period. In developing this estimate,

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

Company assumed that Wyeth would maintain its initially elected number of eight full-time
equivalents throughout the five-year period. The steering committee effort was also expected to be
consistent over the five-year period. On November 3, 2006, Wyeth agreed to extend the research
funding term by one year through February 9, 2008 but elected to fund only five researchers working
on the program through the research term. Accordingly, the Company revised its estimated level of
effort over the remaining performance period. In December 2007, Wyeth informed the Company that it
would not extend the current contractual research funding term beyond February 2008. As a result, the
Company changed its estimated performance period to coincide with the conclusion of the research
term from its original estimate of February 2009. On March 7, 2008, Wyeth provided notice that it was
terminating the agreement.

The $1,362,000 up-front license fee plus $7,250,000, the total amount of research funding which the
Company will be entitled to for providing an average of 7.25 full-time equivalents over the four-year
performance period at a rate of $250,000 each (eight full-time equivalents over the first three years and
five full-time equivalents over the last year), is therefore being attributed to the research services.
Revenue was recognized as the research services were provided over the remaining performance period
through February 2008 at a rate of $297,000 per full-time equivalent.

During the years ended December 31, 2008, 2007 and 2006, the Company recorded revenue of
$299,000, $1,968,000 and $2,604,000, respectively, related to the Company’s research efforts under
the Wyeth arrangement, of which $103,000, $439,000 and $306,000, respectively, were recorded in
“License Fees” and $196,000, $1,332,000 and $2,298,000, respectively, were recorded in “Research
and development contracts” in the Company’s Revenues section of its Consolidated Statement of
Operations. Included within “Research and development contracts”, the Company recorded $62,000,
$197,000 and $298,000 for the years ended December 31, 2008, 2007 and 2006, respectively, as
revenue related to expenses incurred on behalf of Wyeth that were paid by the Company and for which
Wyeth is obligated to reimburse the Company. As of December 31, 2008, the Company had no
amounts recorded as amounts receivable from Wyeth.

As of December 31, 2008, the Company has not provided any consideration to Wyeth.

(b) PROCTER & GAMBLE

On September 18, 2005, the Company entered into a collaboration, research and license agreement
with Procter & Gamble to evaluate and seek to develop potential treatments for hair growth regulation
and skin disorders utilizing the Company’s Hedgehog agonist technology.

Under the terms of the agreement, the Company granted Procter & Gamble an exclusive, worldwide,
royalty-bearing license for the development and commercialization of topical dermatological and hair
growth products that incorporate the Company’s Hedgehog agonist technology. In accordance with the
terms of the agreement, the parties agreed to jointly undertake a research program with the goal of
identifying one or more compounds to be developed and commercialized by Procter & Gamble. Under
the agreement, Procter & Gamble paid the Company an up-front license fee of $500,000 and agreed to
fund up to $600,000 for two Curis full-time equivalents providing research and development activities
during the initial one-year research term, subject to its termination rights. Procter & Gamble had an
option to extend the initial one-year research term for up to three additional years in one-year
increments, and, in September 2006, Procter & Gamble exercised the option to extend research funding
through September 2007 for one-third of a full-time equivalent for $83,000.

On May 9, 2007, Procter & Gamble notified the Company of Procter & Gamble’s decision to terminate
the collaboration effective November 9, 2007.

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

The Company recorded revenue under this collaboration of $1,878,000 and $898,000 during the years
ended December 31, 2007 and 2006, respectively. Of these amounts, $1,242,000 and $235,000 were
attributed to the amortization of (i) the up-front license fee and (ii) a contingent cash payment that did
not constitute a substantive milestone since the successful achievement of these objectives did not meet
each of the criteria set forth in the Company’s revenue recognition policy related to substantive
milestones. These amounts are included in the “License fees” line item within the Revenues section of
the Company’s Consolidated Statement of Operations for the years ended December 31, 2007 and
2006. Of the remaining amounts, $548,000 and $107,000 were related to research services performed
by the Company’s two full-time equivalents for the years ended December 31, 2007 and 2006,
respectively, and $88,000 and $556,000 for the years ended December 31, 2007 and 2006, respectively,
related to expenses incurred on behalf of Procter & Gamble by the Company for which Procter &
Gamble is obligated to reimburse the Company, and for which the Company believes that the revenue
recognition provisions of EITF 99-19 have been met. These amounts are included within the “Research
and development contracts” line item within the Revenues section of the Company’s Consolidated
Statement of Operations. The Company did not record any revenues under this agreement for the year
ended December 31, 2008. As of December 31, 2008, the Company had no amounts receivable from
Procter & Gamble.

As of December 31, 2008, the Company has not provided any consideration, such as payments under
co-development arrangements, to Procter & Gamble.

(c) SPINAL MUSCULAR ATROPHY FOUNDATION

(i) Agreement Summary

Effective September 7, 2004, the Company entered into a sponsored research agreement with the
Spinal Muscular Atrophy, or SMA, Foundation. Under the agreement, the SMA Foundation had
committed to grant the Company up to $5,364,000 over a three-year period for the identification of
therapeutic compounds to treat spinal muscular atrophy, a neurological disease. The sponsored research
agreement was terminated by both parties on November 30, 2006, and the Company has no remaining
performance obligations under this grant.

(ii) Accounting Summary

The Company’s sole deliverable under this sponsored research agreement was to provide research
services. The Company has applied the provisions of SAB No. 104 for recognizing revenue under this
collaboration. The Company recognized revenues under this collaboration as the services were
performed, since payment was reasonably assured under the terms of the grant. For the year ended
December 31, 2006, the Company recognized $1,191,000 related to its research and development
efforts under this sponsored research agreement. These amounts are included in “Research and
development contracts” in the Company’s Revenues section of its Consolidated Statement of
Operations. The Company did not record any revenues under this agreement for the years ended
December 31, 2008 or 2007.

(d) MICROMET AG

In 2001, the Company entered into three agreements with Micromet including: (i) a purchase and sale
to which the Company assigned its single-chain-polypeptide technology to
agreement pursuant
Micromet in exchange for up-front consideration of $12,146,000, consisting of $8,000,000 in cash,

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

$3,460,000 in a euro-denominated note receivable, and equity valued by the Company at $686,000,
(ii) a product development agreement and (iii) a target research and license agreement. The note
receivable received under the purchase and sale agreement bore interest at 7% and was due and payable
in full on the earlier of (i) the closing date of an initial public offering of Micromet’s shares or
(ii) June 30, 2005. At maturity, the Company had the option to receive either cash or shares of
Micromet common stock. Further, under these agreements, the Company was entitled to receive
royalties on Micromet’s revenues, if any, arising out of the assigned technology, rights to jointly
develop and commercialize future product discoveries, if any, arising out of the product development
agreement and access to other technologies. The product development agreement provided the
Company with the right to (i) jointly fund research to develop antibodies on up to four potential targets
through the proof of principle stage and (ii) jointly fund the development of two such antibody targets
from the proof of principle stage through the completion of Phase I clinical trials.

On October 21, 2004, the Company amended its note receivable with Micromet, and, under the
amended note, Micromet was obligated to pay the Company a total amount of €4,500,000, subject to
certain conditions. As a result of Micromet’s financing in October 2004, the Company received a
€1,250,000 payment in 2004, resulting in a gain of $1,604,000 based on the EURO-to-US dollar
foreign exchange rate on the date of payment. The gain was recorded in other income as it related to a
recovery of previously written-off interest income and foreign exchange gains related to the note.

As a result of completing additional financings in 2005, Micromet made a second payment of
€1,250,000 on October 27, 2005, which resulted in a gain of $1,500,000 based on the EUR-to-US
dollar foreign exchange rate on such date. $1,400,000 of the gain was recorded as license fee revenue
for the year ended December 31, 2005 because it represented the recovery of a previously written-off
note that the Company had received from Micromet in exchange for the assignment of technology. The
remaining $100,000 was recorded in other income as it is related to a recovery of previously written-off
interest income and foreign exchange gains related to the note.

In March 2006, the Company asserted that the conditions precedent to the payment of the remaining
€2,000,000 due under the note receivable had been achieved through Micromet’s merger with
CancerVax, a claim that Micromet disputed. In September 2006, the Company agreed to a court-
proposed settlement agreement with Micromet, pursuant to which Micromet was required to repay the
note receivable in two installments of €1,000,000, on each of November 1, 2006 and May 31, 2007.
Under the terms of the settlement agreement, if Micromet made the second payment on or before
April 30, 2007, the second payment would decrease to €800,000. The Company believed that it was
probable that Micromet would honor its obligation under the court ruling and pay Curis €1,000,000 by
November 1, 2006 and €800,000 by April 30, 2007, to take advantage of the 30-day discount term. As
a result of this recovery of amounts owed under the note, the Company recorded license fee revenues
of $2,284,000 during the year ended December 31, 2006 based on the then Euro-to-U.S. dollar
exchange rate. The first payment of €1,000,000, or $1,252,000, was received on October 17, 2006, and
the second payment of €800,000, or $1,082,000, was received on April 20, 2007. Accordingly, no
additional amounts are due under this note.

(5) STOCK PLANS AND STOCK BASED COMPENSATION

2000 Stock Incentive Plan

In March 2000, the Board of Directors adopted and, in June 2000, the stockholders approved, the 2000
Stock Incentive Plan (the 2000 Plan), which permits the grant of incentive and non-qualified options to
purchase the Company’s common stock as well as the issuance of restricted shares of common stock.

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CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

Beginning on January 1, 2001 and continuing through January 1, 2010, the number of shares of
common stock reserved for issuance under the 2000 Plan is automatically increased by the lesser of
1,000,000 shares or 4% of outstanding stock on January 1 of each year. As of December 31, 2008, the
number of shares of common stock reserved for issuance under the 2000 Plan is 18,000,000 and
4,331,856 shares are available for grant under the 2000 Plan.

The 2000 Plan permits the granting of incentive and non-qualified stock options and stock awards to
employees, officers, directors, and consultants of the Company and its subsidiaries at prices determined
by the Company’s Board of Directors. Awards of stock may be made to consultants, directors,
employees or officers of the Company and its subsidiaries, and direct purchases of stock may be made
by such individuals also at prices determined by the Board of Directors. Options become exercisable as
determined by the Board of Directors and expire up to 10 years from the date of grant. Awards issued
under the 2000 Plan have generally consisted of stock options that typically vest over a four-year
period and that are issued with exercise prices equal to the closing market price of the Company’s
common stock on the NASDAQ Global Market on the grant date. The Company has, however, also
issued stock options that vest over shorter periods, stock options with performance conditions, as well
as restricted stock and unrestricted stock awards.

During the year ended December 31, 2008, the Company’s Board of Directors granted stock options to
purchase 1,826,000 shares of common stock to the Company’s employees, executive officers and
non-employee directors under the 2000 Plan. Of these stock options, 1,211,000 shares of common
stock will vest over a four-year period. Stock options to purchase 204,000 shares of common stock
were issued to non-officer employees of the Company with a performance condition and will vest on
April 24, 2014 or upon the consummation of a collaboration, licensing or other similar agreement
regarding programs under the Company’s targeted cancer programs that includes an up-front cash
payment of at least $10,000,000 excluding any equity investment in the Company, whichever occurs
first, subject to the employee’s continued employment. In consideration for the reduction of annual
base salaries of the Company’s executive officers, the Board of Directors granted stock options to
purchase 296,000 shares of common stock to three of the Company’s four executive officers, which
will vest monthly over a twelve-month period beginning November 24, 2008, subject to the executive
officer’s continued employment. The remaining stock options to purchase 115,000 shares of common
stock were issued to the Company’s non-employee directors and vested on the date of grant. All of
these stock options were issued with exercise prices equal to the closing market price of the Company’s
common stock on the NASDAQ Global Market on the respective grant dates.

On October 24, 2008, in consideration for the reduction of his annual base salary, the Board of
Directors granted to the Chief Operating and Chief Financial Officer a restricted stock award under the
2000 Plan for 79,113 shares of common stock at a purchase price of $0.01 per share which will vest
monthly over a twelve-month period beginning November 24, 2008. The only substantive restriction on
the award relates to a one-year service condition to achieve full vesting of the award. The restricted
common stock is subject to a right of repurchase by the Company, which lapses after this one-year
period, or October 24, 2009. The Company does not intend to exercise its repurchase right to these
shares. The closing price of the common stock on October 24, 2008 was $0.79 per share, which is also
the weighted average grant date fair value of the restricted stock. Accordingly, the Company will
recognize $62,000 in compensation expense over a one-year period, assuming a 0% forfeiture rate. For
the year ended December 31, 2008, the Company recognized $10,000 related to this award and 65,928
of the 79,113 shares of common stock granted remained unvested at December 31, 2008.

86

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

2000 Director Stock Option Plan

In March 2000, the Board of Directors adopted and, in June 2000, the shareholders approved the 2000
Director Stock Option Plan (the 2000 Director Plan). The 2000 Director Plan provides for the grant of
non-qualified options to non-employee directors as follows: (i) upon his or her initial election, each
non-employee director receives an option to purchase 25,000 shares of the Company’s common stock
that vests over a four-year period and that is issued with an exercise price that is equal to the closing
price of the Company’s common stock on the grant date; and (ii) each director receives an annual grant
of a stock option to purchase 5,000 shares of the Company’s common stock that vests and becomes
exercisable upon the grant date and that is issued with an exercise price that is equal to the closing
price of the Company’s common stock on the grant date.

During the year ended December 31, 2008, the Company’s Board of Directors granted options to its
Board of Directors to purchase 35,000 shares of common stock under the 2000 Director Plan, which
fully vested on the grant date of January 25, 2008. The exercise price of each of these options is equal
to the closing market price of the Company’s common stock on the NASDAQ Global Market on the
date of grant. As of December 31, 2008, the number of shares of common stock subject to issuance
under the 2000 Director Plan is 500,000 and there are 45,000 shares available for grant.

2000 Employee Stock Purchase Plan

In March 2000, the Board of Directors adopted and, in June 2000, the stockholders approved, the 2000
Employee Stock Purchase Plan (the ESPP). The Company has reserved 1,000,000 of its shares of
common stock for issuance under the ESPP. Eligible employees may purchase shares at 85% of the lower
closing market price at the beginning or ending date of the purchase period, as defined. The Company has
two six-month purchase periods per year. During the year ended December 31, 2008, 224,424 shares were
issued under the ESPP and there are 192,677 shares available for future purchase under the ESPP.

A summary of stock option activity under the 2000 Plan and the 2000 Director Plan is summarized as
follows:

Weighted
Average
Exercise
Price per
Share

Number of
Shares

Outstanding, December 31, 2007 (6,207,111 exercisable at weighted average price of

$3.51 per share) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Granted—employees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cancelled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9,240,966
1,861,000
(109,075)
(542,132)

$2.93
1.25
1.00
2.60

Outstanding, December 31, 2008 (7,218,825 exercisable at weighted average price of

$3.23 per share) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10,450,759

$2.67

Vested and unvested expected to vest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10,253,375

$2.69

87

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

The table below summarizes options outstanding and exercisable at December 31, 2008:

Exercise Price Range

$0.56 - $1.35 . . . . . . . . . . . . . . . . . . . . . . .
1.39 - 1.39 . . . . . . . . . . . . . . . . . . . . . . .
1.43 - 1.50 . . . . . . . . . . . . . . . . . . . . . . .
1.57 - 2.43 . . . . . . . . . . . . . . . . . . . . . . .
2.48 - 4.03 . . . . . . . . . . . . . . . . . . . . . . .
4.05 - 29.26 . . . . . . . . . . . . . . . . . . . . . . .

Options Outstanding

Options Exercisable

Weighted
Average
Remaining
Contractual
Life (in years)

Weighted
Average
Exercise Price
per Share

7.62
8.43
6.97
6.11
4.39
3.83

6.25

$1.04
1.39
1.46
1.96
3.74
7.23

$2.67

Number of
Shares

520,075
770,999
798,907
2,076,499
1,654,049
1,398,296

7,218,825

Weighted
Average
Exercise Price
per Share

$1.10
1.39
1.49
2.02
3.72
7.23

$3.23

Number of
Shares

1,264,844
1,832,875
1,780,907
2,423,126
1,750,086
1,398,921

10,450,759

The aggregate intrinsic value of options outstanding at December 31, 2008 was $6,000, of which all
related to exercisable options, and the weighted average remaining contractual life of vested stock
options at December 31, 2008 was 6.04 years. The weighted average grant-date fair values of stock
options granted during the years ended December 31, 2008, 2007 and 2006 were $0.91, $1.10 and
$1.62, respectively. As of December 31, 2008, there was approximately $2,991,000, including the
impact of estimated forfeitures, of unrecognized compensation cost related to unvested employee stock
option awards outstanding under the 2000 Plan and 2000 Director Plan that is expected to be
recognized as expense over a weighted average period of 2.7 years. The intrinsic value of employee
stock options exercised during the years ended December 31, 2008, 2007 and 2006 were $38,000,
$13,000 and $45,000, respectively. The total fair value of vested stock options for the years ended
December 31, 2008, 2007 and 2006 were $2,003,000, $3,300,000 and $3,423,000, respectively.

In determining the fair value of stock options, the Company generally uses the Black-Scholes option
pricing model. As discussed below, for employee stock options with a market performance condition,
the Company uses a lattice-based option valuation model. The Black-Scholes option pricing model
employs the following key assumptions for employee option grants issued in each of the following
years:

For the Year Ended December 31,

2008

2007

2006

Expected term (years)—Employees . . . . . . . . . . . . . . . . . . .
Expected term (years)—Directors . . . . . . . . . . . . . . . . . . . . .
Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.0-6.0
7.0

5.5-6.25
5.0

5.5-7.0
7.0
1.7-3.4% 3.6-4.9% 4.5-5.2%
71-93% 90-97% 95-102%
None

None

None

For the years ended December 31, 2007 and 2006, the expected terms of the options granted were
calculated using the “simplified approach,” as outlined in Staff Accounting Bulletin (SAB) No. 107,
Share-Based Payments. Using this approach, for grants issued during the years ended December 31,
2007 and 2006, the Company assigned an expected term of 6.25 years for grants with four-year graded
vesting and 5.5 years for grants with one-and two-year vesting. As of January 1, 2008, the “simplified
approach” could no longer be used for estimating expected terms.

The expected volatility is based on the annualized daily historical volatility of the Company’s stock
price through the end of the reporting period for a time period consistent with the expected term of a
grant. Management believes that the historical volatility of the Company’s stock price best represents

88

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

the volatility of the stock price. The risk-free rate is based on the U.S. Treasury yield curve in effect at
the time of grant. The Company does not anticipate declaring dividends in the foreseeable future.

The stock price volatility and expected terms utilized in the calculation involve management’s best
estimates at that time, both of which impact the fair value of the option calculated under the Black-
Scholes methodology and, ultimately, the expense that will be recognized over the life of the option.
SFAS 123(R) also requires that the Company recognize compensation expense for only the portion of
options that are expected to vest. Therefore, management calculated an estimated annual pre-vesting
forfeiture rate that is derived from historical employee termination behavior since the inception of the
Company, as adjusted. If the actual number of forfeitures differs from those estimated by management,
additional adjustments to compensation expense may be required in future periods. The Company does
not have a policy to repurchase shares of its common stock upon employee stock option exercises.
Further, no such repurchases have been made.

Under SFAS 123(R), the lattice-based model was used to value a limited number of stock options
issued in June 2002 that remained unvested as of January 1, 2006, and that contain a market condition.
These awards accounted for $40,000 and $70,000 of the employee stock-based compensation expense
recorded by the Company for the years ended December 31, 2007 and 2006, respectively. The lattice
model utilized assumptions including a 7-year expected life, 2.10% risk-free rate, 116% volatility, and
a 0% dividend rate. These awards became fully vested during 2007 and no additional expense related to
these options was recognized in subsequent periods.

For the years ended December 31, 2008, 2007 and 2006, the Company recorded compensation expense
related to its ESPP and calculated the fair value of shares expected to be purchased under the ESPP
using the Black-Scholes model with the following assumptions:

For the Year Ended December 31,

2008

2007

2006

Compensation expense recognized under ESPP . . .
Expected term . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . .
Volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$
73,000
6 months
0-1.9%
75-86%
None

$
64,000
6 months
3.3-5.0%
64-71%
None

$
80,000
6 months
4.6-5.3%
70-85%
None

Stock-based compensation for employees for the years ended December 31, 2008, 2007 and 2006 of
$2,182,000, $3,105,000 and $3,820,000, respectively, was calculated using the above valuation models
and has been included in the Company’s results of operations. No income tax benefit has been recorded
as the Company has recorded a full valuation allowance and management has concluded that it is not
likely that the net deferred tax asset will be realized (see Note 12). Based on basic and diluted weighted
average shares outstanding of 63,378,159, 54,914,666 and 49,066,680 for
the years ended
December 31, 2008, 2007 and 2006, respectively, the effect on the Company’s net loss per share of
stock-based compensation expense recorded under SFAS 123(R) was approximately $0.03, $0.06 and
$0.08 per share.

Non-Employee Grants

During the years ended December 31, 2007 and 2006, the Company granted stock options and
unrestricted stock awards to consultants for services. The options were issued at or above their fair
market value on the date of grant and have various vesting dates from date of grant, ranging from 9
months to 4 years. In addition, certain non-employee options vested only upon the achievement of
performance objectives. Should the Company terminate the consulting agreements, any unvested

89

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

options will be cancelled. Options issued to non-employees are marked-to-market liabilities, which
means that as the Company’s stock price fluctuates, the liability and related expense either increases or
decreases. The Company recognized expense of $24,000 and $85,000 related to non-employee stock
options and stock awards for the years ended December 31, 2008 and 2007, respectively. The Company
reversed expense of $58,000 related to non-employee stock options for the year ended December 31,
2006 as a result of a decline in the Company’s stock price throughout 2006. As of December 31, 2008,
the Company had recorded $13,000 in deferred compensation related to unvested non-employee
options.

For the years ended December 31, 2008, 2007 and 2006, the Company recorded employee and
non-employee stock-based compensation expense to the following line items in its Costs and Expenses
section of the Consolidated Statements of Operations and Comprehensive Loss:

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

$ 743,000
1,463,000

$ 803,000
2,387,000

$1,105,000
2,657,000

Total stock-based compensation expense . . . . . .

$2,206,000

$3,190,000

$3,762,000

For the Year ended December 31,

2008

2007

2006

(6) PROPERTY AND EQUIPMENT

Property and equipment consist of the following:

Laboratory equipment, computers and software . . . . . . . . . . .
Laboratory equipment and computers under notes

payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leasehold improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leasehold improvements under notes payable . . . . . . . . . . . .
Office furniture and equipment . . . . . . . . . . . . . . . . . . . . . . . .

Less—Accumulated depreciation and amortization . . . . . . . .

December 31,

2008

2007

$ 3,971,000

$ 3,647,000

—
6,254,000
—
380,000

777,000
4,619,000
1,623,000
368,000

10,605,000
(9,157,000)

11,034,000
(8,456,000)

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 1,448,000

$ 2,578,000

The Company recorded depreciation and amortization expense of $999,000, $1,302,000 and
$1,408,000 for the years ended December 31, 2008, 2007 and 2006, respectively.

In the fourth quarter of 2006, the Company initiated a realignment of its research programs, focusing
on later-stage preclinical drug development programs and de-emphasizing its earlier discovery research
programs. The Company revised its estimates of the depreciable lives on the remaining equipment
currently being used in its discovery research programs as a result of two of the Company’s discovery
programs ending: the sponsored research agreement with the SMA Foundation, which ended in the
fourth quarter of 2006, and the April 2005 drug discovery collaboration with Genentech, which ended
in the first quarter of 2007. During the year ended December 31, 2006, the Company recorded property
and equipment impairment charges of $148,000 related to the impairment of assets that had been used
in the Company’s discovery research programs.

the Company’s BMP-7 small molecule screening
During the year ended December 31, 2007,
agreement with Centocor (a Johnson & Johnson subsidiary) concluded in accordance with the terms of

90

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

the contract and was the only remaining discovery research program. The Company determined that it
would not fund the program internally and, as a result, during the year ended December 31, 2007,
recorded property and equipment impairment charges of $352,000, net of estimated proceeds from the
sale of these assets, because this discovery equipment could not be used on other ongoing programs.
These impairment charges have been reported within the “Research and development” line item within
the Expenses section of the Company’s Consolidated Statement of Operations for the years ended
December 31, 2007 and 2006.

The Company will continue to review its estimate of remaining useful lives related to assets currently
being used on the Company’s remaining programs. Any future changes to the estimated useful lives of
the Company’s assets could have a material impact on its financial statements.

(7) ACCRUED LIABILITIES

Accrued liabilities consist of the following:

Accrued compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Professional fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Facility-related costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$111,000
137,000
262,000
114,000

$ 708,000
73,000
192,000
178,000

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$624,000

$1,151,000

December 31,

2008

2007

(8) DEBT OBLIGATIONS

Boston Private Bank & Trust Company. Short-term debt, including accrued interest, was $404,000 at
December 31, 2007. This debt related to two separate 36-month term notes that the Company entered
into loan agreements with the Boston Private Bank & Trust Company, one for $2,250,000 at a fixed
rate of 7.36% and the other for $1,450,000 at a fixed rate of 7.95% for the respective repayment
periods. On April 1, 2008, the Company made the final repayments related to these notes and the
Company has no further obligations under these notes.

Becton Dickinson. On June 26, 2001, the Company received $2,000,000 from Becton Dickinson
under a convertible subordinated note payable in connection with the exercise of an option to negotiate
a collaboration agreement. The note payable was repayable at the option of the Company in either cash
or issuance of the Company’s common stock, also at the option of the Company, at any time up to its
maturity date of June 26, 2006. On January 20, 2006, the Company elected to prepay the then-
outstanding principal and interest due under the note in the amount of $2,639,000 by issuing to Becton
Dickinson 669,656 shares of the Company’s common stock, based on a 10-day trailing average of the
Company’s closing stock prices resulting in a conversion price of $3.94 per share. The Company has
no further obligations under this convertible note payable.

91

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

(9) COMMITMENTS

(a) OPERATING LEASES

The Company has noncancellable operating lease agreements for office and laboratory space. The
Company’s remaining operating lease commitments for all leased facilities with an initial or remaining
term of at least one year are as follows:
Year Ending December 31,

2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter

$ 948,000
948,000
—

Total minimum payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,896,000

Rent expense for all operating leases was $776,000, $541,000 and $863,000 for the years ended
December 31, 2008, 2007 and 2006, respectively, net of settlement proceeds received during 2007 and
facility sublease income of $262,000 and $185,000 in 2007 and 2006, respectively.

(b) LICENSE AGREEMENTS

The Company licenses a significant portion of its technology from several universities and foundations.
In exchange for the right to use licensed technology in its research and development efforts, the
Company has entered into various license agreements. These agreements generally stipulate that the
Company pays an annual license fee and is obligated to pay royalties on future revenues, if any,
resulting from use of the underlying licensed technology. Such revenues may include, for example,
up-front license fees, development milestones and royalties. In addition, some of the agreements
commit the Company to make contractually defined payments upon the attainment of scientific or
clinical milestones. The Company expenses license fee payments as incurred and expects to expense
royalty payments as related future product sales, if any, are recorded. The Company accrues expenses
for scientific and clinical milestones over the period that the work required to meet the milestone is
completed, provided that the Company believes that the achievement of the milestone is probable. The
Company incurred license fee expenses of $165,000, $199,000 and $295,000 for the years ended
December 31, 2008, 2007 and 2006, respectively.

(10) WARRANTS

The Company has warrants to purchase an aggregate of 5,322,361 shares of its common stock
outstanding as of December 31, 2008. These warrants are summarized as follows:

(a)

In connection with the private placement of 13,631,022 shares of its common stock on August 8,
2007, the Company issued warrants to purchase 4,770,859 shares of its common stock at an
exercise price of $1.02 per share all of which has been accounted for as equity in accordance with
EITF 00-19, Accounting for Derivative Financial Instruments Indexed to, and Potentially Settled
in, a Company’s Own Stock.

The warrants are exercisable for cash until August 8, 2012. In the event that the closing price of
the Company’s common stock as listed on NASDAQ equals or exceeds $2.50 per share for thirty
consecutive days, then for a period of thirty days thereafter the Company may require the
mandatory exercise of the warrants by providing at least twenty business days’ prior written notice
to the holder; provided that the Company simultaneously requires the mandatory exercise of all
warrants then outstanding under this private placement. As of December 31, 2008, none of these
warrants have been exercised.

92

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

(b)

In connection with the registered direct offering of 5,476,559 shares of its common stock on
October 14, 2004, the Company issued warrants to purchase 547,656 shares of its common at an
exercise price of $4.59 per share. The warrants expire on October 14, 2009. As of December 31,
2008, none of these warrants have been exercised.

(c) At December 31, 2008, other warrants to purchase 3,846 shares of common stock at an exercise
price of $19.51 per share are outstanding. These warrants expire at various dates, ranging from
September 2009 until December 2009.

(11) CURIS SHANGHAI

In August 2006, the Company established a wholly-owned subsidiary in Shanghai, China called Curis
Pharmaceuticals (Shanghai) Co., Ltd., or Curis Shanghai. Upon establishment of the subsidiary, the
Company was required by the Chinese government to contribute $2,100,000 to Curis Shanghai, of
which the first contribution of $420,000 was made in November 2006. The Company converted
$140,000 of this initial contribution into local currency and this amount will therefore be affected by
foreign currency fluctuations. The remaining $280,000 initial
investment was in a U.S. dollar-
denominated bank account in China. During 2007, the Chinese government approved the Company’s
request to decrease its capital requirement to $140,000, and $280,000 of the initial investment made in
China was returned to the Company in July 2007.

As of December 31, 2008, Curis Shanghai was not operational. There were only nominal transactions
related to administrative expenses at Curis Shanghai for the years ended December 31, 2008, 2007 and
2006. There were no intercompany transactions during the years ended December 31, 2008, 2007 and
2006. Curis Shanghai currently has no employees and the Company does not plan to hire any
subsidiary employees for
the foreseeable future. The Company currently expects that certain
operational aspects, including oversight of the third party chemistry provider, will be managed from the
Company’s Cambridge, Massachusetts’ location.

(12) INCOME TAXES

For the years ended December 31, 2008, 2007 and 2006, the Company did not record any federal or
state tax expense given its continued net operating loss position.

The provision for income taxes for continuing operations was at rates different from the U.S. federal
statutory income tax rate for the following reasons:

Statutory federal income tax rate . . . . . . . . . . . . . . . . . . . . . . . . . . .
State income taxes, net of federal benefit
. . . . . . . . . . . . . . . . . . . .
Research and development tax credits . . . . . . . . . . . . . . . . . . . . . . .
Deferred compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOL expirations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net increase (decrease) in valuation allowance . . . . . . . . . . . . . . . .

For the Year Ended
December 31,

2008

2007

2006

34.0% 34.0% 34.0%
5.7% 5.2% 5.0%
3.3% 7.4% 9.0%
(3.2%)
(6.5%)
(6.9%)
(53.7%) (70.3%) (19.5%)
(0.6%)
(0.2%)
(2.6%)
16.5% 30.8% (21.4%)

Effective income tax rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

—% —% —%

93

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

Deferred tax assets and deferred tax liabilities are recognized based on temporary differences between
the financial reporting and tax basis of assets and liabilities using future expected enacted rates. A
valuation allowance is recorded against deferred tax assets if it is more likely than not that some or all
of the deferred tax assets will not be realized.

The principle components of the Company’s deferred tax assets at December 31, 2008 and 2007,
respectively are as follows:

December 31,

2008

2007

Deferred Tax Assets:

Net operating loss carryforwards . . . . . . . . . . . . . . .
Research and development tax credit

carryforwards . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depreciation and amortization . . . . . . . . . . . . . . . . .
Capitalized research and development

expenditures . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impairment of investments . . . . . . . . . . . . . . . . . . . .
Stock options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued expenses and other . . . . . . . . . . . . . . . . . . .

$ 69,826,000

$ 71,296,000

9,814,000
1,819,000

9,586,000
2,663,000

24,295,000
—
124,000
1,864,000
140,000

23,725,000
746,000
124,000
1,482,000
257,000

Total Gross Deferred Tax Asset . . . . . . . . . . . . . . . . . . . .
Valuation Allowance . . . . . . . . . . . . . . . . . . . . . . . . . . . .

107,882,000
(107,882,000)

109,879,000
(109,879,000)

Net Deferred Tax Asset

. . . . . . . . . . . . . . . . . . . . . . . . . .

$

— $

—

The classification of the above deferred tax assets is as follows:

December 31,

2008

2007

Deferred Tax Assets:

Current deferred tax assets . . . . . . . . . . . . . . . . . . . .
Non-current deferred tax assets . . . . . . . . . . . . . . . .
Valuation Allowance . . . . . . . . . . . . . . . . . . . . . . . .

$

127,000
107,755,000
(107,882,000)

$

996,000
108,883,000
(109,879,000)

Net Deferred Tax Asset

. . . . . . . . . . . . . . . . . . . . . . . . . .

$

— $

—

As of December 31, 2008, the Company had federal and state net operating losses (“NOLs”) of
$195,974,000 and $50,952,000, respectively, and federal and state research and experimentation credit
carryforwards of approximately $8,028,000 and $2,706,000, respectively, which will expire at various
dates starting in 2009 through 2028. The Company had $17,355,000 of federal net operating losses
generated in 1993 and $9,631,000 of Massachusetts net operating losses generated in 2003 that expired
in 2008. As required by SFAS No. 109, the Company’s management has evaluated the positive and
negative evidence bearing upon the realizability of its deferred tax assets, and has determined that it is
not more likely than not that the Company will recognize the benefits of the deferred tax assets.
Accordingly, a valuation allowance of approximately $107,882,000 has been established at
December 31, 2008. The benefit of deductions from the exercise of stock options is included in the
NOL carryforwards. The benefit from these deductions will be recorded as a credit to additional paid-in
capital if and when realized through a reduction of cash taxes.

Utilization of the NOL and R&D credit carryforwards may be subject to a substantial annual limitation
under Section 382 of the Internal Revenue Code of 1986 due to ownership change limitations that have

94

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

occurred previously or that could occur in the future. These ownership changes may limit the amount
of NOL and R&D credit carryforwards that can be utilized annually to offset future taxable income and
tax, respectively. The Company has not completed a study to assess whether a change of control has
occurred or whether there have been multiple changes of control since the Company’s formation
because the Company continues to maintain a full valuation allowance on its NOL and R&D credit
carryforwards. In addition, there could be additional ownership changes in the future, which may result
in additional limitations in the utilization of the carryforward NOLs and credits, and the Company does
not expect to have any taxable income for the foreseeable future.

In June 2006, the FASB issued Interpretation No. 48, “Accounting for Uncertainty in Income Taxes, an
interpretation of FAS 109” (“FIN 48”). This statement clarifies the criteria that an individual tax
position must satisfy for some or all of the benefits of that position to be recognized in a company’s
financial statements. The Company adopted FIN No. 48 on January 1, 2007. The implementation of
FIN No. 48 did not have a material impact on the Company’s consolidated financial statements, results
of operations or cash flows. At the adoption date of January 1, 2007, and also at December 31, 2008,
the Company had no unrecognized tax benefits. The Company has not, as yet, conducted a study of its
research and development credit carryforwards. This study may result
to the
Company’s research and development credit carryforwards, however, until a study is completed and
any adjustment is known, no amounts are being presented as an uncertain tax position under FIN 48. A
full valuation allowance has been provided against the Company’s research and development credits
and, if an adjustment is required, this adjustment would be offset by an adjustment to the valuation
allowance. Thus, there would be no impact to the consolidated balance sheet or statement of operations
if an adjustment were required.

in an adjustment

The tax years 1994 through 2007 remain open to examination by major taxing jurisdictions to which
the Company is subject, which are primarily in the United States (“U.S.”), as carryforward attributes
generated in years past may still be adjusted upon examination by the Internal Revenue Service (“IRS”)
or state tax authorities if they have or will be used in a future period. The Company is currently not
under examination by the Internal Revenue Service or any other jurisdictions for any tax years. The
Company recognizes both accrued interest and penalties related to unrecognized benefits in income tax
expense. The Company has not recorded any interest and penalties on any unrecognized tax benefits
since its inception.

(13) RETIREMENT SAVINGS PLAN

The Company has a 401(k) retirement savings plan covering substantially all of the Company’s
employees. Matching Company contributions are at the discretion of the Board of Directors. For the
years ended December 31, 2007 and 2006, the Board of Directors authorized matching contributions of
$129,000 and $139,000, respectively. The Board of Directors did not authorize matching contributions
for the year ended December 31, 2008 as the Company continues to reduce costs.

(14) RELATED PARTY TRANSACTIONS

The Company and Joseph M. Davie, Ph.D., M.D., a member of the Company’s Board of Directors,
entered into a consulting agreement, which was approved by the Board of Directors on August 23,
2006 with an effective date of June 19, 2006, the date on which Dr. Davie commenced the performance
of consulting services for the Company as the Interim Chief Scientific Officer, as amended on
October 30, 2006. This agreement expired on June 19, 2007 in accordance with its terms. In
consideration for the services rendered by Dr. Davie to the Company, the Company agreed to pay
Dr. Davie compensation in the amount of $4,000 per day for each day of consulting work, or $500 per

95

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

hour for portions thereof. For the years ended December 31, 2007 and 2006, the Company had incurred
$8,000 and $53,000, respectively, in related consulting expenses in its Consolidated Statement of
Operations.

On September 14, 2006, the Company and Dr. Davie entered into a Scientific Advisory and Consulting
Agreement pursuant to which Dr. Davie agreed to serve as Chairman of the Company’s Scientific
Advisory Board. The term of this agreement is for a period of five years. Either party may terminate
this agreement by providing thirty days’ written notice to the other party. In consideration for the
services rendered by Dr. Davie to the Company, the Company agreed to pay Dr. Davie an annual
retainer of $25,000. Such retainer became effective upon the expiration of the consulting agreement for
services as interim Chief Scientific Officer on June 19, 2007. For the years ended December 31, 2008
and 2007, the Company incurred $25,000 and $13,000, respectively, in Scientific Advisory Board
services provided by Dr. Davie. As of December 31, 2008, $6,000 was included in “Accounts payable”
in the Company’s Consolidated Balance Sheet. For the year ended December 31, 2006, the Company
did not incur costs for Dr. Davie in his role as Chairman of the Scientific Advisory Board because this
retainer did not become effective until June 19, 2007.

In connection with the Scientific Advisory Board agreement, the Board also granted to Dr. Davie an
option, pursuant to the 2000 Plan, to purchase 35,000 shares of common stock of the Company at an
exercise price equal to $1.72, which was the closing price of the common stock of the Company on the
NASDAQ Global Market on September 14, 2006, the date of grant. These options will vest quarterly
over a four-year period.

(15) SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

The following are selected quarterly financial data for the years ended December 31, 2008 and 2007:

Quarter Ended

March 31,
2008

June 30,
2008

September 30,
2008

December 31,
2008

Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss from operations . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss applicable to common stockholders . . . . . . . . . .
Basic and diluted net loss per share . . . . . . . . . . . . . .
Shares used in computing basic and diluted net loss

$ 2,067,583
(3,823,723)
(3,430,667)

$ 3,107,810
(2,217,682)
(1,964,556)

$

86,721
(4,775,516)
(4,571,451)

$

(0.05) $

(0.03) $

(0.07) $

$ 3,104,503
(2,302,723)
(2,156,424)
(0.03)

per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

63,245,538

63,337,647

63,435,070

63,492,498

Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income (loss) from operations . . . . . . . . . . . . . . . . . .
Net income (loss) applicable to common

stockholders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic net income (loss) per share . . . . . . . . . . . . . . . .
Diluted net income (loss) per share . . . . . . . . . . . . . . .
Shares used in computing basic net income (loss) per
share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shares used in computing diluted net income (loss)

March 31,
2007

June 30,
2007

September 30,
2007

December 31,
2007

$ 2,362,786
(3,884,414)

$ 1,228,724
(4,177,286)

$ 1,312,202
(4,122,660)

$11,484,842
3,809,799

(3,540,773)

(3,997,544)

(3,718,300)

$
$

(0.07) $
(0.07) $

(0.08) $
(0.08) $

(0.06) $
(0.06) $

4,292,374
0.07
0.07

49,354,125

49,408,100

57,534,767

63,180,451

per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

49,354,125

49,408,100

57,534,767

63,206,837

The net loss amounts presented above for the quarter ending December 31, 2008 include $3,000,000 of
license revenue recognized under the Genentech June 2003 collaboration.

96

CURIS, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—Continued

The net loss amounts presented above for the quarter ending December 31, 2007 include $10,509,000
of revenue recognized under the Genentech June 2003 collaboration, which includes $3,000,000 for a
contingent cash payment that the Company received in October 2007 (see Note 3(a)).

(16) Subsequent Events

In February 2009, Genentech notified the Company that it had initiated a pivotal Phase II clinical trial
of GDC-0449, an orally-administered small molecule Hedgehog pathway inhibitor, as a single-agent
therapy for patients with metastatic or locally advanced basal cell carcinoma. As a result, the Company
will receive a $6,000,000 cash payment from Genentech under the parties’ June 2003 collaboration
agreement during the first quarter of 2009. Genentech is obligated to make the payment because it
determined that the pivotal classification satisfied the criteria for a Phase III clinical trial under the
parties’ collaboration agreement.

97

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND

FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls & Procedures

Our management, with the participation of our chief executive officer and chief financial officer, evaluated
the effectiveness of our disclosure controls and procedures as of December 31, 2008. The term “disclosure
controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls
and other procedures of a company that are designed to ensure that information required to be disclosed by us in
the reports that we file or submit 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. Management recognizes that any controls and procedures, no matter how
well designed and operated, can provide only reasonable assurance of achieving their objectives and management
necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.
Based on the evaluation of our disclosure controls and procedures as of December 31, 2008, our chief executive
officer and chief financial officer concluded that, as of such date, our disclosure controls and procedures were
effective at the reasonable assurance level.

Management’s report on internal control over financial reporting, as defined in Rules 13a-15(f) and
15d-15(f) under the Exchange Act, is included in Item 8 of this annual report on Form 10-K and is incorporated
herein by reference.

Changes in Internal Control Over Financial Reporting

No changes in our internal control over financial reporting occurred during the year ended December 31,
2008 that have materially affected, or are reasonably likely to materially affect, our internal control over financial
reporting.

ITEM 9B. OTHER INFORMATION

None.

98

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Information concerning directors that is required by this Item 10 is set forth in our proxy statement for our
2009 annual meeting of stockholders under the headings “Directors and Nominees for Director,” “Board
Committees” and “Section 16(a) Beneficial Ownership Reporting Compliance,” which information is
incorporated herein by reference. The information concerning our code of ethics is set forth in our proxy
statement under the heading “Code of Business Conduct and Ethics.” The name, age, and position of each of our
executive officers is set forth under the heading “Executive Officers of the Registrant” in Part I of this Annual
Report on Form 10-K, which information is incorporated herein by reference.

ITEM 11. EXECUTIVE COMPENSATION

Information required by this Item 11 is set forth in our proxy statement for our 2009 annual meeting of
stockholders under the headings “Executive and Director Compensation and Related Matters,” Compensation
Committee Interlocks and Insider Participation” and “Compensation Committee Report” which information is
incorporated herein by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

AND RELATED STOCKHOLDER MATTERS

Information required by this Item 12 is set forth in our proxy statement for our 2009 annual meeting of
stockholders under the headings “Securities Authorized for Issuance Under Equity Compensation Plans” and
“Security Ownership of Certain Beneficial Owners and Management,” which information is incorporated herein
by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR

INDEPENDENCE

Information required by this Item 13 is set forth in our proxy statement for our 2009 annual meeting of
stockholders under the headings “Policies and Procedures for Related Person Transactions,” “Determination of
Independence” and “Board Committees” which information is incorporated herein by reference.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

Information required by this Item 14 is set forth in our proxy statement for our 2009 annual meeting of
stockholders under the heading “Independent Registered Public Accounting Firm’s Fees and Other Matters,”
which information is incorporated herein by reference.

99

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a)(1) Financial Statements.

PART IV

Page
number
in this
report

Curis, Inc. and Subsidiaries

Report of Independent Registered Public Accounting Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Consolidated Balance Sheets as of December 31, 2008 and 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Consolidated Statements of Operations and Comprehensive Loss for the Years Ended December 31,

2008, 2007 and 2006 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Consolidated Statements of Stockholders’ Equity for the Years Ended December 31, 2008, 2007 and

2006 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Consolidated Statements of Cash Flows for the Years Ended December 31, 2008, 2007 and 2006 . . . . .

Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

61

62

63

64

65

66

(a)(2) Financial Statement Schedules.

All schedules are omitted because they are not applicable or the required information is shown in the

Financial Statement or Notes thereto.

(a)(3) List of Exhibits. The list of Exhibits filed as a part of this annual report on Form 10-K is set forth on

the Exhibit Index immediately preceding such Exhibits, and is incorporated herein by reference.

100

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

CURIS, INC.

By:

/s/ DANIEL R. PASSERI
Daniel R. Passeri
President and Chief Executive Officer

Date: February 26, 2009

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/ DANIEL R. PASSERI
Daniel R. Passeri

/s/ MICHAEL P. GRAY
Michael P. Gray

/s/ JAMES R. MCNAB, JR.
James R. McNab, Jr.

/s/ SUSAN B. BAYH
Susan B. Bayh

/s/ JOSEPH M. DAVIE
Joseph M. Davie

/s/ MARTYN D. GREENACRE
Martyn D. Greenacre

/s/ KENNETH I. KAITIN
Kenneth I. Kaitin

/s/ JAMES R. TOBIN
James R. Tobin

President, Chief Executive Officer and

February 26, 2009

Director (Principal Executive
Officer)

Chief Operating Officer and Chief

February 26, 2009

Financial Officer (Principal Financial
and Accounting Officer)

Chairman of the Board of Directors

February 26, 2009

February 26, 2009

February 26, 2009

February 26, 2009

February 26, 2009

February 26, 2009

Director

Director

Director

Director

Director

101

EXHIBIT INDEX

Exhibit
No.

Description

Articles of Incorporation and By-laws

Incorporated by Reference

Form

SEC Filing
Date

Exhibit
Number

Filed with
this 10-K

3.1 Restated Certificate of Incorporation of Curis,

S-4/A (333-32446)

06/19/00

3.3

Inc.

3.2 Certificate of Designations of Curis, Inc.

S-3 (333-50906)

08/10/01

3.3 Amended and Restated By-laws of Curis, Inc.

S-1 (333-50906)

11/29/00

3.4 Amendment to Amended and Restated By-laws

8-K

09/24/07

3.2

3.2

3.1

of Curis, Inc.

Instruments defining the rights of security holders, including
indentures

4.1 Form of Curis Common Stock Certificate

10-K

03/01/04

4.1

Material contracts—Management Contracts and Compensatory
Plans

#10.1 Employment

Agreement,

of
September 18, 2007, between Curis and Daniel
R. Passeri

dated

as

#10.2 Amendment to Employment Agreement, dated as
of October 31, 2006,
to the employment
agreement dated September 20, 2001, by and
between Curis and Daniel R. Passeri

#10.3 Amendment to Employment Agreement, dated as
of October 27, 2008,
to the employment
agreement dated September 18, 2007, by and
between Curis and Daniel R. Passeri

8-K

09/24/07

10.1

8-K

11/02/06

10.2

10-Q

10/28/08

10.1

#10.4 Offer Letter, dated as December 10, 2003,

10-K

03/01/04

10.4

between Curis and Michael P. Gray

#10.5 Amendment

to Offer Letter, dated as of
October 31, 2006,
letter dated
December 10, 2003, by and between Curis and
Michael P. Gray

to the offer

8-K

11/02/06

10.3

#10.6 Amendment to Offer Letter, dated as of October
27, 2008, to the offer letter dated December 10,
2003, by and between Curis and Michael P. Gray

10-Q

10/28/08

10.2

#10.7 Offer Letter, dated May 2, 2001, by and between

10-K

3/14/08

10.5

Curis and Changgeng Qian

#10.8 Amendment to Offer Letter, dated as of May 10,
2002, to the offer letter dated May 2, 2001, by
and between Curis and Changgeng Qian

#10.9 Amendment

to Offer Letter, dated as of
December 14, 2006,
to the offer letter dated
May 2, 2001, as amended on May 10, 2002, by
and between Curis and Changgeng Qian

E-1

10-K

3/14/08

10.6

10-K

3/14/08

10.7

Exhibit
No.

Description

#10.10 Amendment

to Offer Letter, dated as of
to the offer letter dated
October 27, 2008,
May 2, 2001, by and between Curis and
Changgeng Qian

Incorporated by Reference

SEC Filing
Date

Exhibit
Number

Filed with
this 10-K

10/28/08

10.3

Form

10-Q

#10.11 Offer Letter, dated January 11, 2001, by and

10-K

03/02/07

10.6

between Curis and Mark W. Noel

#10.12 Amendment

to Offer Letter, dated as of
October 31, 2006,
to the offer letter dated
January 11, 2001, by and between Curis and
Mark W. Noel

#10.13 Amendment to Offer Letter, dated as of October
27, 2008, to the offer letter dated January 11,
2001, by and between Curis and Mark W. Noel

8-K

11/02/06

10.4

10-Q

10/28/08

10.4

#10.14 Offer Letter, dated as of July 25, 2002, between

10-K

03/01/04

10.5

Curis and Mary Elizabeth Potthoff

#10.15 Amendment

to Offer Letter, dated as of
to the offer letter dated
October 31, 2006,
July 25, 2002, by and between Curis and Mary
Elizabeth Potthoff

#10.16 Agreement and General Release, dated as of
June 25, 2007, by and between Curis and Mary
Elizabeth Potthoff

#10.17 Consulting Agreement dated June 19, 2006 by
and between Curis and Joseph M. Davie,
Ph. D., M.D.

#10.18 First Amendment

to Consulting Agreement,
dated as of October 30, 2006, between Curis
and Joseph M. Davie, Ph.D., M.D.

#10.19 Scientific

Advisory

dated
September 14, 2006 by and between Curis and
Joseph M. Davie, Ph. D., M.D.

Agreement

#10.20 Agreement for Service as Chairman of the
Board of Directors, between Curis, Inc. and
James McNab, dated as of June 1, 2005

#10.21 Form of Indemnification Agreement, between
Curis, Inc. and each member of the Board of
Directors named on Schedule I thereto

#10.22

Indemnification Agreement between Curis, Inc.
and Dr. Stephen Carter, dated January 29, 2008

8-K

11/02/06

10.5

10-Q

07/31/07

10.1

8-K

08/29/06

10.1

8-K

11/02/06

10.1

8-K

09/19/06

10.2

8-K

06/07/05

10.1

10-Q

08/09/05

10.5

8-K

1/31/08

10.1

#10.23 Consulting Agreement dated May 11, 2007 by

10-K

3/14/08

10.19

and between Curis and Dr. Stephen Carter.

#10.24 Curis 2000 Stock Incentive Plan

S-4/A (333-32446)

05/31/00

10.71

#10.25 Curis 2000 Director Stock Option Plan

S-4/A (333-32446)

05/31/00

10.72

E-2

Exhibit
No.

Description

Incorporated by Reference

Form

SEC Filing
Date

Exhibit
Number

Filed with
this 10-K

#10.26 Curis 2000 Employee Stock Purchase Plan

S-4/A (333-32446)

05/31/00

10.73

#10.27 Form of Incentive Stock Option Agreement
granted to directors and named executive
officers under Curis’ 2000 Stock Incentive Plan

#10.28 Form of Non-statutory Stock Option Agreement
granted to directors and named executive
officers under Curis’ 2000 Stock Incentive Plan

#10.29 Form of Non-statutory Stock Option Agreement
granted to non-employee directors under Curis’
2000 Director Stock Option Plan

Material contracts—Leases

10.30 Lease, dated November 16, 1995, as amended,
Inc., Moulton Realty
between Ontogeny,
Corporation and the trustees of Moulton Realty
Trust relating to the premises at 33 and 45
Moulton Street, Cambridge, Massachusetts

10.31 Lease, dated March 15, 2001, between Curis
and Moulton Realty Company relating to the
premises at 61 Moulton Street, Cambridge,
Massachusetts

10.32 Amendment to Lease, dated August 9, 2002,
between Curis and FPRP Moulton LLC relating
to the premises at 25, 27, 33, 45 and 61
Moulton Street, Cambridge, Massachusetts

10.33 Second Amendment to Leases, dated August
17, 2004, between Curis and FPRP Moulton
LLC relating to the premises at 25, 27, 33, 45
and
Cambridge,
Massachusetts

61 Moulton

Street,

Material contracts—Financing Agreements

10.34 Line of Credit Agreement for the Acquisition of
Improvements,
Equipment
restated on September 23, 2004, between Curis
and Boston Private Bank & Trust Company

and Leasehold

10.35 Security Agreement,

on
September 23, 2004, between Curis and Boston
Private Bank & Trust Company

restated

dated

10.36 Secured Non-Revolving Time Note, dated
restated on September 23, 2004, made by Curis
in favor of Boston Private Bank & Trust
Company

10.37 Line of Credit Agreement for the Acquisition of
Equipment
Improvements,
between Curis, Inc. and Boston Private Bank &
Trust Company, dated as of June 9, 2005

and Leasehold

E-3

10-Q

10/26/04

10.2

10-Q

10/26/04

10.3

10-Q

10/26/04

10.4

S-4 (333-32446)

03/14/00

10.42

10-K

03/30/01

10.3

10-Q

11/12/02

10.1

10-Q

10/26/04

10.1

10-K

03/15/05

10.18

10-K

03/15/05

10.19

10-K

03/15/05

10.20

8-K

06/15/05

10.1

Exhibit
No.

Description

10.38 Secured Non-Revolving Time Note, issued by
to Boston Private Bank & Trust

Curis, Inc.
Company, dated June 9, 2005

10.39 Security Agreement (Equipment), between Curis,
Inc. and Boston Private Bank & Trust Company,
dated June 9, 2005

Material contracts—License and Collaboration
Agreements

†10.40 License Agreement, dated as of February 12,
1996, between Curis and Leland Stanford Junior
University

†10.41 License Agreement, dated as of January 1, 1995
as amended on July 19, 1995 and August 30,
1996, between Ontogeny and The Trustees of
Columbia University in the City of New York

†10.42 Amended and Restated License Agreement,
dated June 1, 2003, between Curis, The Johns
Hopkins
of
University
Washington School of Medicine

University

and

†10.43 Amended and Restated License Agreement
(2000), dated June 10, 2003, between Curis and
the President and Fellows of Harvard University

†10.44 Amended and Restated License Agreement
(1995), dated June 10, 2003, between Curis and
the President and Fellows of Harvard University

†10.45 Agreement, dated as of November 27, 2002, by
and Ortho Biotech

between Curis

and
Products, L.P.

†10.46 Collaborative Research, Development

and
License Agreement, dated June 11, 2003,
between Curis and Genentech, Inc.

10.47 First Amendment

to Collaborative Research,
Development and License Agreement, effective
December
and
10,
Genentech, Inc.

between Curis

2004,

Incorporated by Reference

SEC Filing
Date

Exhibit
Number

Filed with
this 10-K

06/15/05

10.2

Form

8-K

8-K

06/15/05

10.3

S-4/A (333-32446)

06/02/00

10.43

S-4/A (333-32446)

04/03/00

10.45

10-K

03/01/04

10.23

10-K

03/01/04

10.24

10-K

03/01/04

10.25

8-K

12/09/02

10.1

8-K

07/10/03

10.1

10-K

03/15/05

10.33

10.48 Second Amendment

to Collaborative Research,
Development and License Agreement between
Curis and Genentech effective as of April 11, 2005

†10.49 Drug Discovery and Collaboration Agreement
dated April 1, 2005 by and between Curis, Inc.
and Genentech, Inc.

†10.50 Collaboration, Research and License Agreement,
dated January 12, 2004, between Curis and Wyeth

8-K

04/19/05

99.1

10-Q

4/29/05

10.1

10-K

03/01/04

10.29

E-4

Exhibit
No.

Description

†10.51 Collaboration, Research and License Agreement dated
September 18, 2005 by and between Curis, Inc. and Procter &
Gamble Company

Material contracts—Miscellaneous

10.52 Termination Agreement

and Amendments

to Finance
Documents, dated May 16, 2003, between Elan Corporation,
PLC, Neuralab Limited, Elan International Services, LTD, Elan
Pharma International Limited, Curis, Inc. and Curis Newco,
LTD

Incorporated by Reference

Form

SEC Filing
Date

Exhibit
Number

Filed with
this 10-K

10-Q 11/14/05

10.1

8-K 06/03/03

10.1

10.53 Registration Rights Agreement, dated June 13, 2003, between

8-K 07/10/03

10.3

Curis and Genentech, Inc.

10.54 Common Stock Purchase Agreement, dated June 11, 2003,

8-K 07/10/03

10.2

between Curis and Genentech, Inc.

10.55 Common Stock Purchase and Registration Rights Agreement,

10-K 03/01/04

10.34

dated January 9, 2004, between Curis and Wyeth

10.56 Form of Common Stock and Warrant Purchase Agreement,
dated August 11, 2003, entered into by Curis and certain
investors, together with a schedule of such investors and the
material details of each such agreement

10.57 Form of Stock Purchase Agreement, dated as of October 12,
2004, entered into by Curis and each of the purchasers,
together with a schedule of purchasers who are parties thereto

10.58 Common Stock Purchase Agreement, dated as of August 6,
2007, by and among the Company and the Purchasers (as
defined therein), as amended by Amendment
to Common
Stock Purchase Agreement and Waiver, dated August 7, 2007

10.59 Common Stock Purchase Agreement, dated as of August 7,
2007, by and among the Company and the Purchasers (as
defined therein)

10.60 Registration Rights Agreement, dated as of August 6, 2007, by
and among the Company and the Purchasers (as defined
therein), as amended by Amendment to Registration Rights
Agreement, dated August 7, 2007

10.61 Form of Warrant, dated August 8, 2007, issued pursuant to the
Common Stock Purchase Agreement, dated as of August 6,
2007, as amended on August 7, 2007

10.62 Form of Warrant, dated August 8, 2007, issued pursuant to the
Common Stock Purchase Agreement, dated as of August 7,
2007

Code of Conduct

10-Q 11/12/03

10.1

8-K 10/14/04

10.1

8-K 08/09/07

10.1

8-K 08/09/07

10.2

8-K 08/09/07

10.3

8-K 08/09/07

10.4

8-K 08/09/07

10.5

14

Code of Business Conduct and Ethics

10-K 03/01/04

14

E-5

Exhibit
No.

Description

Additional Exhibits

21

Subsidiaries of Curis

23.1

Consent of PricewaterhouseCoopers LLP

31.1

31.2

32.1

32.2

Certification of the Chief Executive Officer pursuant to Rule
13a-14(a) of the Exchange Act/15d-14(a) of the Exchange Act

Certification of the Chief Financial Officer pursuant to Rule
13a-14(a) of the Exchange Act/15d-14(a) of the Exchange Act

Certification of the Chief Executive Officer pursuant to Rule
13a-14(b)/15d-14(b) of the Exchange Act and 18 U.S.C. Section
1350

Certification of the Chief Financial Officer pursuant to Rule
13a-14(b)/15d-14(b) of the Exchange Act and 18 U.S.C. Section
1350

Incorporated by Reference

Form

SEC Filing
Date

Exhibit
Number

Filed with
this 10-K

X

X

X

X

X

X

#

†

Indicates management contract or compensatory plan or arrangement.

Confidential treatment has been requested as to certain portions, which portions have been separately filed
with the Securities and Exchange Commission.

E-6

SHAREHOLDER INFORMATION
Curis, Inc. and Subsidiaries

OFFICERS
Daniel R. Passeri
President and Chief Executive Officer

Michael P. Gray
Chief Operating Officer, Chief Financial
Officer, Treasurer and Secretary

Changgeng Qian, Ph.D., M.D.
Vice President, Discovery and Preclinical
Development

Mark W. Noel
Vice President, Technology Management
and Intellectual Property

MARKET INFORMATION
Our common stock has traded on the
NASDAQ Global Market since August 1,
2000. Our trading symbol is “CRIS.”
There were 301 shareholders of record as
of February 24, 2009. The following table
sets forth, for the fiscal periods indicated,
the high and low sales prices per share of
our common stock as reported on the
NASDAQ Global Market:

FY 2008

1st Quarter
2nd Quarter
3rd Quarter
4th Quarter

FY 2007

1st Quarter
2nd Quarter
3rd Quarter
4th Quarter

HIGH LOW

$1.63
$1.58
$1.94
$1.21

$0.91
$1.13
$1.08
$0.68

HIGH LOW

$1.72
$2.35
$1.31
$1.20

$1.15
$1.21
$0.93
$0.86

CAUTIONARY NOTE

We have never declared or paid any cash
dividends on our common stock and we do
not anticipate paying cash dividends in the
foreseeable future.

CORPORATE HEADQUARTERS
Curis, Inc.
45 Moulton Street
Cambridge, MA 02138
P: 617.503.6500
F: 617.503.6501

TRANSFER AGENT
BNY Mellon Shareowner Services
P.O. Box 358015
Pittsburgh, PA 15252-8015
P: 877.810.2248
www.bnymellon.com/shareowner/isd

BOARD OF DIRECTORS
Susan B. Bayh
Director, Dyax Corporation, Dendreon
Corporation, Emmis Communications,
Inc., and Wellpoint, Inc.

Joseph M. Davie, Ph.D., M.D.
Director, CV Therapeutics Corporation
and Targeted Genetics, Inc.

Martyn D. Greenacre
Chairman of the Board, BMP Sunstone
and Life Mist, L.L.C.; Director, Cephalon,
Inc., and Acusphere, Inc.

Kenneth I. Kaitin, Ph.D.
Director of the Tufts Center for the Study
of Drug Development; Professor of
Medicine at Tufts University School of
Medicine

James R. McNab, Jr.
Chairman and Chief Executive Officer,
Palmetto Pharmaceuticals, Inc., Director,
Argolyn Biosciences, Inc.

Daniel R. Passeri
President and Chief Executive Officer,
Curis, Inc.

James R. Tobin
President and Chief Executive Officer,
Boston Scientific Corporation

INDEPENDENT ACCOUNTANTS
PricewaterhouseCoopers LLP
125 High Street
Boston, MA 02110
P: 617.530.5000
www.pwcglobal.com

LEGAL COUNSEL
Wilmer Cutler Pickering Hale and Dorr
LLP
60 State Street
Boston, MA 02109
P: 617.526.6000
www.wilmerhale.com

ANNUAL MEETING
The annual meeting of shareholders will be
held at 10:00 a.m. on June 3, 2009, at the
offices of Wilmer Cutler Pickering Hale
and Dorr LLP 60 State Street, Boston, MA
02109

SEC FORM 10-K
A copy of our 2008 annual report on Form
10-K, without exhibits, is available without
charge upon written request to:

INVESTOR RELATIONS
Curis, Inc.
45 Moulton Street
Cambridge, MA 02138
info@curis.com

This Annual Report contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements
about Curis’ financial results and expected cash life, the potential effectiveness of its technologies under development and other information pertaining to its
various research and development programs, strategies, plans and prospects. Such statements may contain the words “believes”, “expects”, “anticipates”,
“plans”, “seeks”, “estimates” or similar expressions. These forward looking statements are not guarantees of future performance and involve risks and
uncertainties that may cause Curis’ actual results to be materially different from those indicated by such forward-looking statements. Actual results can be
affected by a number of important factors including, among other things: adverse results in Curis’ and its strategic collaborators’ product development
programs; difficulties or delays in obtaining or maintaining required regulatory approvals; Curis’ ability to obtain or maintain required patent and other
proprietary intellectual property protection; changes in or Curis’ inability to execute its business strategy; the risk that Curis does not obtain required additional
funding ; unplanned cash requirements; risks relating to Curis’ ability to enter into and maintain important strategic collaborations, including its ability to
maintain its current Hedgehog pathway inhibitor collaboration agreement with Genentech and; competitive risks; and other risk factors identified in Curis’
most recent Annual Report on Form 10-K, Quarterly Report on Form 10-Q and any subsequent reports filed with the Securities and Exchange Commission. In
addition, any forward-looking statements represent Curis’ views only as of the date of this Annual Report and should not be relied upon as representing its
views as of any subsequent date. Curis disclaims any intention or obligation to update any of the forward-looking statements, whether as a result of new
information, future events or otherwise.

45 Moulton Street
Cambridge, MA 02138

TEL: 617.503.6500
FAX: 617.503.6501

www.curis.com