Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2015

OR

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

For the transition period from              to             

Commission file number: 001-35403

Verastem, Inc.

(Exact name of registrant as specified in its charter)

(781) 292-4200

(Registrant’s telephone number, including area code)

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 x  No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x  No o

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.

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

As of October 29, 2015 there were 36,934,804 shares of Common Stock, $0.0001 par value per share, outstanding.

Table of Contents

TABLE OF CONTENTS

2

Table of Contents

FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements related to present facts or current conditions or historical facts, contained in this Quarterly Report on Form 10-Q, the utility of FAK inhibitors for the treatment of cancer, including statements regarding our strategy, future operations, future financial position, future revenues, projected costs, prospects, plans and objectives of management, are forward looking statements. Such statements relate to, among other things, the development of our product candidates, including VS-6063, VS-4718 and VS-5584, and our FAK, PI3K/mTOR, and diagnostics programs generally, the timeline for clinical development and regulatory approval of our product candidates, the expected timing for the reporting of data from on-going trials, the structure of our planned or pending clinical trials, additional planned studies, our rights to develop or commercialize our product candidates and our ability to finance contemplated development activities and fund operations for a specified period. The words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “target,” “potential,” “will,” “would,” “could,” “should,” “continue” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.

Forward-looking statements are not guarantees of future performance and our actual results could differ materially from the results discussed in the forward-looking statements. Factors that could cause actual results to differ materially from those in the forward-looking statements include, but are not limited to, our ability to raise additional capital to support our clinical development program and other operations, our ability to develop products of commercial value and to identify, discover and obtain rights to additional product candidates, our ability to protect and maintain our intellectual property and the ability of our licensors to obtain and maintain patent protection for the technology or products that we license from them, the fact that the preclinical and clinical testing of our product candidates and preliminary data from clinical trials may not be predictive of the success of ongoing or later clinical trials, that data may not be available when we expect it to be, that enrollment of clinical trials may take longer than expected, that our product candidates may cause unexpected safety events, that we will be unable to successfully initiate or complete the clinical development of our product candidates, including VS-6063, VS-4718 and VS-5584, that development of our product candidates will take longer or cost more than planned, our reliance on third-parties, competitive developments, the effect of current and future legislation and regulation and regulatory actions, as well as other risks described in our Annual Report on Form 10-K, under “Risk Factors” and elsewhere in this Quarterly Report on Form 10-Q and other filings with the Securities and Exchange Commission (SEC).

As a result of these and other factors, we may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue reliance on our forward-looking statements. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments we may make. We do not assume any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

3

Table of Contents

PART I—FINANCIAL INFORMATION

Item 1.  Condensed Consolidated Financial Statements (Unaudited).

Verastem, Inc.

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited)

(in thousands, except per share amounts)

See accompanying notes.

4

Table of Contents

Verastem, Inc.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(unaudited)

(in thousands, except per share amounts)

See accompanying notes.

5

Table of Contents

Verastem, Inc.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited)

(in thousands)

See accompanying notes.

6

Table of Contents

Verastem, Inc.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. Summary of significant accounting policies

Basis of presentation

The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial reporting and as required by Regulation S-X, Rule 10-01. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (including those which are normal and recurring) considered necessary for a fair presentation of the interim financial information have been included. When preparing financial statements in conformity with GAAP, the Company must make estimates and assumptions that affect the reported amounts and related disclosures at the date of the financial statements. Actual results could differ from those estimates. Additionally, operating results for the three and nine months ended September 30, 2015 are not necessarily indicative of the results that may be expected for any other interim period or for the fiscal year ending December 31, 2015. For further information, refer to the financial statements and footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 as filed with the Securities and Exchange Commission (“SEC”) on March 10, 2015.

There have been no changes to the Company’s significant accounting policies included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 as filed with the SEC on March 10, 2015.

2. Fair value of financial instruments

The Company is required to disclose information on all assets and liabilities reported at fair value that enables an assessment of the inputs used in determining the reported fair values. The fair value hierarchy prioritizes valuation inputs based on the observable nature of those inputs. The fair value hierarchy applies only to the valuation inputs used in determining the reported fair value of the investments and is not a measure of the investment credit quality. The hierarchy defines three levels of valuation inputs:

The following table presents information about the Company’s financial assets and liabilities that have been measured at fair value at September 30, 2015 and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands):

7

Table of Contents

The following table presents information about the Company’s financial assets and liabilities that have been measured at fair value at December 31, 2014 and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands):

The Company’s cash equivalents and investments are comprised of money market accounts, government-sponsored enterprise securities, corporate bonds and commercial paper. These investments have been initially valued at the transaction price and subsequently valued, at the end of each reporting period, utilizing third party pricing services or other market observable data. The pricing services utilize industry standard valuation models, including both income and market based approaches and observable market inputs to determine value. These observable market inputs include reportable trades, benchmark yields, credit spreads, broker/dealer quotes, bids, offers, current spot rates and other industry and economic events. The Company validates the prices provided by third party pricing services by reviewing their pricing methods and matrices, obtaining market values from other pricing sources, analyzing pricing data in certain instances and confirming that the relevant markets are active. After completing its validation procedures, the Company did not adjust or override any fair value measurements provided by the pricing services as of September 30, 2015 and December 31, 2014.

The Company’s liability classified stock-based compensation awards are comprised of restricted stock units (RSUs) that allow for greater than minimum statutory tax withholdings. These awards are valued based on the fair value of the Company’s common stock underlying the awards, which is traded on an active market. During the first quarter of 2013, the Company amended the terms of certain RSUs to allow for cash tax withholdings greater than the minimum required statutory withholding amount. As a result of this change in the terms of the awards, the outstanding RSUs are considered to be liability instruments. As a result of this modification, the Company records a liability for the fair value of the awards as of each reporting date with the change in fair value recorded through the statement of operations. The Company will record stock-based compensation expense equal to the greater of the original grant date fair value of the awards or the settlement date fair value. During the three and the nine months ended September 30, 2015 and 2014, the Company made approximate payments of $164,000, $417,000, $200,000 and $757,000, respectively, to settle the tax liability for awards that settled during such periods.

3. Investments

The Company’s investments are classified as available-for-sale pursuant to the accounting standards for investments in debt and equity securities. The Company classifies investments available to fund current operations as current assets on its balance sheets. Investments are classified as long-term assets on the balance sheets if (i) the Company has the intent and ability

8

Table of Contents

to hold the investments for a period of at least one year and (ii) the contractual maturity date of the investments is greater than one year.

Investments are carried at fair value with unrealized gains and losses included as a component of accumulated other comprehensive (loss) income, until such gains and losses are realized. If a decline in the fair value is considered other-than-temporary, based on available evidence, the unrealized loss is transferred from other comprehensive loss to the statement of operations. There were no charges taken for other-than-temporary declines in fair value of short-term or long-term investments during the three and nine months ended September 30, 2015 and 2014. The Company recorded approximate unrealized gains and (losses) of $12,000, $33,000, $(3,000) and $(2,000) during the three and nine months ended September 30, 2015 and 2014, respectively. Realized gains and losses are included in interest income in the statement of operations. There were no realized gains or losses recognized during the three and nine months ended September 30, 2015 or 2014. The Company utilizes the specific identification method as a basis to determine the cost of securities sold.

The Company reviews investments for other-than-temporary impairment whenever the fair value of an investment is less than the amortized cost and evidence indicates that an investment’s carrying amount is not recoverable within a reasonable period of time. To determine whether an impairment is other-than-temporary, the Company considers the intent to sell, or whether it is more likely than not that the Company will be required to sell, the investment before recovery of the investment’s amortized cost basis. Evidence considered in this assessment includes reasons for the impairment, compliance with the Company’s investment policy, the severity and the duration of the impairment and changes in value subsequent to year end. As of September 30, 2015, there were no investments with a fair value that was significantly lower than the amortized cost basis or any investments that had been in an unrealized loss position for a significant period.

Cash, cash equivalents and investments at September 30, 2015 and December 31, 2014 consist of the following (in thousands):

9

Table of Contents

Verastem, Inc.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

4. Accrued expenses

Accrued expenses consist of the following (in thousands):

5. Net loss per share

Basic and diluted net loss per common share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period, without consideration for common stock equivalents. The Company’s potentially dilutive shares, which include outstanding stock options, restricted stock units and unvested restricted stock and the warrant issued in 2014 are considered to be common stock equivalents and are only included in the calculation of diluted net loss per share when their effect is dilutive.

The following potentially dilutive securities were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect:

6. Stock-based compensation

In December 2011, the Company adopted the 2012 Incentive Plan (the 2012 Plan). The 2012 Plan became effective upon the closing of the Company’s IPO in February 2012. The 2012 Plan provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock awards, restricted stock units and other stock-based and cash awards. Upon effectiveness, the number of shares of common stock that are reserved under the 2012 Plan is the sum of 3,428,571 shares plus the number of shares available under the Company’s prior 2010 Plan. The number of shares reserved under the 2012 Plan is increased by the number of shares of common stock (up to a maximum of 571,242 shares) subject to outstanding awards under the 2010 Plan that expire, terminate or are otherwise surrendered, cancelled, forfeited or repurchased. The 2012 Plan includes an “evergreen provision” that allows for an annual increase in the number of shares of common stock available for issuance under the 2012 Plan. The annual increase will be added on the first day of each year beginning in 2013 and each subsequent anniversary until the expiration of the 2012 Plan, equal to the lowest of 1,285,714 shares of common stock, 4.0% of the number of shares of common stock outstanding and an amount determined by the board of directors. On January 1, 2015 and 2014, the shares available under the 2012 Plan increased by 1,081,045 and 1,026,309 shares of common stock, respectively.

In December 2014, the Company established an inducement award program (in accordance with NASDAQ Listing Rule 5635(c)(4)) under which it may grant non-statutory stock options to purchase up to an aggregate of 750,000 shares of common stock to new employees as inducement for prospective employees to enter into employment with the Company. The program is governed by the terms of the 2012 Plan but the shares are not issued pursuant to the 2012 Plan.  The Company has granted 210,000 options to purchase shares under this program as of September 30, 2015.

10

Table of Contents

Restricted common stock

A summary of the Company’s restricted common stock activity and related information is as follows:

No restricted common stock was granted during the three and nine months ended September 30, 2015 and 2014. The total fair value of shares vested during the three and nine months ended September 30, 2015 and 2014 was an approximate $0, $59,000, $605,000 and $2.2 million, respectively. As of September 30, 2015, there was no unrecognized stock-based compensation expense related to unvested restricted common stock.

A summary of the Company’s restricted stock units (RSUs) activity and related information is as follows:

No RSUs were granted during the three and nine months ended September 30, 2015 and 2014. The approximate total fair value of RSUs vested during the three and nine months ended September 30, 2015 and 2014 was $761,000, $1.7 million, $790,000 and $2.2 million, respectively. As of September 30, 2015, there was approximately $472,000 of total unrecognized stock-based compensation expense related to unvested RSUs granted under the 2012 Plan. The Company expects to recognize this expense over a weighted average period of 0.3 years.

During the first quarter of 2013, the Company amended the terms of certain RSUs related to a total of 697,060 shares of common stock to allow for tax withholdings greater than the minimum required statutory withholding amount, of which 83,565 remain outstanding as of September 30, 2015. As a result of this change in the terms of the awards, the outstanding RSUs are considered to be liability instruments. As a result of this modification, the Company records a liability for the fair value of the awards as of each reporting date with the change in fair value recorded through the statement of operations. The Company will record stock-based compensation expense equal to the greater of the original grant date fair value of the awards or the settlement date fair value. During the three and nine months ended September 30, 2015 and 2014, the Company made approximate deposits with the taxing authorities of $164,000, $417,000, $200,000 and $757,000, respectively, in respect of the tax liability for awards that settled during such periods.

Stock options

A summary of the Company’s stock option activity and related information follows:

11

Table of Contents

The fair value of each stock option is estimated on the grant date using the Black-Scholes option-pricing model using the following weighted average assumptions:

7. Equity Offerings

In January 2015, the Company closed a public offering in which it sold 8,337,500 shares of its common stock to the public at a price of $6.50 per share, including 1,087,500 shares issued pursuant to the exercise of the underwriters’ option to purchase additional shares. The offering was completed under the shelf registration statement that was filed on Form S-3 and declared effective by the SEC on January 8, 2014. The net proceeds from this offering were approximately $50.9 million, after deducting underwriting discounts and commissions.

In December 2013, the Company established an at-the-market equity offering program pursuant to which it is able to offer and sell up to $35.0 million of its common stock at then current market prices from time to time through Cantor Fitzgerald & Co., as sales agent. In November 2014, the Company commenced sales under this program.  Through December 31, 2014, the Company sold 1,346,676 shares under this program for net proceeds of approximately $11.6 million (after deducting commissions and other offering expenses) and the Company sold an additional 28,800 and 1,189,479 shares in the three and nine months ended September 30, 2015, respectively, for net proceeds of approximately $199,000 and $10.9 million (after deducting commissions and other offering expenses).  Of the cumulative net proceeds through September 30, 2015, $9.6 million was received in 2014 and $12.9 million was received in 2015.

8. Subsequent Events

The Company reviews all activity subsequent to quarter end but prior to issuance of the condensed consolidated financial statements for events that could require disclosure or that could impact the carrying value of assets or liabilities as of the balance sheet date.

On October 7, 2015, the Company committed to a restructuring plan that will result in a reduction of approximately 50% of the Company’s workforce at its Needham, Massachusetts location. The restructuring is a result of a strategic realignment of the Company. Employees received notification on October 7, 2015 and will be provided with severance payments and outplacement assistance. The Company expects to complete the restructuring during the first quarter of 2016.

As a result of the restructuring plan, the Company estimates one-time severance and related costs of $1.1 million.  Approximately $950,000 is expected to be paid over the fourth quarter of 2015 and the first quarter of 2016, with the remainder to be paid later in 2016.

12

Table of Contents

Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations.

You should read the following discussion and analysis of our financial condition and results of operations together with our financial statements and related notes appearing elsewhere in this quarterly report. The following discussion contains forward-looking statements that involve risks and uncertainties. Our actual results and the timing of certain events could differ materially from those anticipated in these forward-looking statements as a result of certain factors, including those discussed below and elsewhere in this quarterly report or in our annual report on Form 10-K. Please also refer to the section under the heading “Forward-Looking Statements.”

OVERVIEW

We are a biopharmaceutical company focused on discovering and developing drugs to treat cancer by the targeted killing of cancer stem cells. A cancer stem cell is a particularly aggressive type of tumor cell, resistant to conventional cancer therapy, that we believe is an underlying cause of tumors, their recurrence and metastasis. Our most advanced programs target the Focal Adhesion Kinase (FAK) and the PI3K/mTOR signaling pathways. Our lead FAK inhibitor, VS-6063, has been assigned defactinib as the United States Adopted Name (USAN). VS-6063 is currently in a Phase 2 study in patients with non-small cell lung cancer, a Phase 2 trial preceding surgery in mesothelioma, a Phase 1b trial in combination with weekly paclitaxel for patients with ovarian cancer, and a combination trial of VS-6063 and VS-5584 in patients with relapsed mesothelioma.

On September 28, 2015, we stopped enrollment in our Phase 2 registration-directed, double-blind, placebo-controlled study (COMMAND) of VS-6063 for patients with mesothelioma. The decision to stop enrollment for futility followed a Data Safety Monitoring Board (DSMB) review of a pre-planned interim analysis. The results of the analysis demonstrated that VS-6063 had a generally well tolerated safety profile but that there was not a sufficient level of efficacy to warrant continuation of the study.

Our operations to date have been organizing and staffing our company, business planning, raising capital, acquiring and developing our technology, identifying potential product candidates and undertaking preclinical studies and clinical trials for our product candidates. To date, we have not generated any revenues and have financed our operations with net proceeds from the private placement of our preferred stock, our initial public offering in February 2012, our follow-on offerings in July 2013 and January 2015 and sales of our common stock under our at-the-market equity offering program.

As of September 30, 2015, we had an accumulated deficit of $187.0 million. We had net losses of $46.0 million and $39.4 million for the nine months ended September 30, 2015 and 2014, respectively.

After we stopped enrollment of COMMAND, we implemented a reduction of approximately 50% of our workforce, in October 2015, to reduce operating expenses and conserve cash resources as part of a corporate realignment to focus our efforts and resources on our ongoing and future programs.  Although the reduction is expected to result in annual savings of approximately $5.1 million in cash operating expenses on a going forward basis, we expect our expenses will increase over time in connection with increased activity and progress in our ongoing and future programs, particularly as we continue the research and development and clinical trials of, and potentially seek marketing approval for, our current and future product candidates. In addition, if we obtain marketing approval for any of our current or future product candidates, we expect to incur significant commercialization expenses related to product sales, marketing, manufacturing and distribution. Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. Adequate additional financing may not be available to us on acceptable terms, or at all. If we are unable to raise capital when needed or on attractive terms, we would be forced to delay, reduce or eliminate our research and development programs or any future commercialization efforts. We will need to generate significant revenues to achieve profitability, and we may never do so.

CRITICAL ACCOUNTING POLICIES AND SIGNIFICANT JUDGMENTS AND ESTIMATES

We believe that several accounting policies are important to understanding our historical and future performance. We refer to these policies as “critical” because these specific areas generally require us to make judgments and estimates about matters that are uncertain at the time we make the estimate, and different estimates—which also would have been reasonable—could have been used, which would have resulted in different financial results.

The critical accounting policies we identified in our most recent Annual Report on Form 10-K for the fiscal year ended December 31, 2014 related to accrued research and development expenses and stock-based compensation. There were no changes to these critical accounting policies in the three and nine months ended September 30, 2015. It is important that the discussion of our operating results that follows be read in conjunction with the critical accounting policies disclosed in our Annual Report on Form 10-K, as filed with the SEC on March 10, 2015.

13

Table of Contents

The Company has elected to follow the extended transition period guidance provided for in Section 7(a)(2)(B) of the Securities Act of 1933, as amended, for complying with new or revised accounting standards. The Company will disclose the date on which adoption of such standards is required for non-emerging growth companies and the date on which the Company will adopt the recently issued accounting standards.

RESULTS OF OPERATIONS

Comparison of the Three Months ended September 30, 2015 and September 30, 2014

Research and development expense.  Research and development expense for the three months ended September 30, 2015 (2015 Quarter) was $11.3 million compared to $9.0 million for the three months ended September 30, 2014 (2014 Quarter). The $2.3 million increase from the 2014 Quarter to the 2015 Quarter was primarily related to an increase of $2.3 million in contract research organization (CRO) expense for outsourced biology, chemistry, development and clinical services, which includes our clinical trial costs, an increase in consulting fees of approximately $299,000, an increase in personnel related costs of approximately $115,000 due to increased headcount and salaries (before our restructuring), and an increase of approximately $102,000 in lab supplies due to increased research activity. These increases were partially offset by a decrease of approximately $537,000 in stock-based compensation.

The table below summarizes our allocation of research and development expenses to our clinical programs for VS-6063, VS-4718 and VS-5584 for the 2015 Quarter and the 2014 Quarter. Our project costing methodology does not allocate personnel and other indirect costs to specific clinical programs. These unallocated research and development expenses are summarized in the table below and include $1.7 million of personnel related costs.

Due to the uncertainty in drug development and the stage of development of our clinical programs, we are unable to predict the requirements, specific timing and estimated costs to complete the development of our product candidates or the timing of when material cash inflows may commence, if ever.

General and administrative expense.  General and administrative expense for the 2015 Quarter was $4.2 million compared to $4.3 million for the 2014 Quarter. The decrease of approximately $100,000 from the 2014 Quarter to the 2015 Quarter primarily resulted from a decrease in professional fees of approximately $249,000, primarily related to lower IP and general legal costs, and a decrease in stock-based compensation expense of approximately $245,000.  These decreases were partially offset by increases in personnel related costs of approximately $247,000, primarily due to an increase in headcount and salaries (before our restructuring), and in consulting fees of approximately $164,000.

Interest income.  Interest income increased to approximately $89,000 for the 2015 Quarter from approximately $56,000 for the 2014 Quarter. This increase was primarily due to a higher average investment balance for the 2015 Quarter compared to the 2014 Quarter.

Comparison of the Nine Months ended September 30, 2015 and September 30, 2014

Research and development expense.  Research and development expense for the nine months ended September 30, 2015 (2015 Period) was $32.9 million compared to $25.8 million for the nine months ended September 30, 2014 (2014 Period). The $7.1 million increase from the 2014 Period to the 2015 Period was primarily related to an increase of approximately $7.3 million in CRO expense for outsourced biology, chemistry, development and clinical services, which includes our clinical trial costs, a $1.6 million increase in personnel related costs, primarily due to increased headcount (before our restructuring), and an increase of approximately $316,000 in consulting expense. These increases were partially offset by a decrease of $1.2 million in license fees related to the Encarta asset purchase in the 2014 Period and a $1.1 million decrease in stock-based compensation expense.

14

Table of Contents

The table below summarizes our allocation of research and development expenses to our clinical programs for VS-6063, VS-4718 and VS-5584 for the 2015 Period and the 2014 Period. Our project costing methodology does not allocate personnel and other indirect costs to specific clinical programs. These unallocated research and development expenses are summarized in the table below and include $5.8 million of personnel related costs.

Due to the uncertainty in drug development and the stage of development of our clinical programs, we are unable to predict the requirements, specific timing and estimated costs to complete the development of our product candidates or the timing of when material cash inflows may commence, if ever.

General and administrative expense.  General and administrative expense for the 2015 Period was $13.4 million compared to $13.8 million for the 2014 Period. The approximate $400,000 decrease from the 2014 Period to the 2015 Period primarily resulted from a decrease of approximately $879,000 in stock-based compensation expense and a decrease in professional fees of approximately $674,000, primarily related to lower IP and general legal costs.  These decreases were partially offset by an increase in personnel related costs of approximately $991,000, primarily due to an increase in salaries and headcount (before our restructuring), and an increase in consulting fees of approximately $130,000.

Interest income.  Interest income increased to approximately $236,000 for the 2015 Period from approximately $193,000 for the 2014 Period. This increase was primarily due to a higher average investment balance for the 2015 Period compared to the 2014 Period.

LIQUIDITY AND CAPITAL RESOURCES

Sources of liquidity

To date, we have not generated any revenues. We have financed our operations to date through private placements of preferred stock, our initial public offering in February 2012, our follow-on offerings in July 2013 and January 2015 and sales of common stock under our at-the market equity offering program. As of September 30, 2015, we had received $68.1 million in net proceeds from the issuance of preferred stock and $190.1 million in net proceeds from our public offerings of common stock. As of September 30, 2015, we had $120.5 million in cash, cash equivalents and investments. We primarily invest our cash, cash equivalents and investments in a U.S. Treasury money market fund, corporate bonds and commercial paper.

Cash flows

Operating activities.  The use of cash in all periods resulted primarily from our net losses adjusted for non-cash charges and changes in the components of working capital. The $8.1 million increase in cash used in operating activities for the 2015 Period compared to the 2014 Period is primarily due to an increase in research and development expenses related to our ongoing clinical trials and development of our lead product candidates.

The recently announced reduction in headcount is expected to result in annual savings of approximately $5.1 million in cash operating expenses on a going forward basis. We estimate aggregate cash charges of $1.1 million for one-time severance and related costs in the fourth quarter of 2015 and the 2016 fiscal year. We expect our cash used in operating activities to increase over time in connection with increased activity and progress in our ongoing and future programs.

Investing activities.  The cash used for investing activities for the 2015 Period primarily reflects the net purchases of investments of $42.0 million. The cash provided by investing activities for the 2014 Period reflects net maturities of investments of $31.7 million, partially offset by $1.9 million of property and equipment purchases primarily associated with the buildout of the Needham facility.

Financing activities.  The cash provided by financing activities for the 2015 Period primarily represents net proceeds of $63.9 million from the sale of shares of our common stock in our January 2015 follow-on offering and our at-the-market equity offering program, offset in part by approximately $417,000 used to satisfy the tax withholding obligations on certain restricted stock units that were net settled by employees. The cash used in financing activities in the 2014 Period reflects

15

Table of Contents

approximately $757,000 used to satisfy the tax withholding obligations on certain restricted stock units that were net settled by employees.

In December 2013, we established an at-the-market equity offering program pursuant to which we are able to offer and sell up to $35.0 million of our common stock at then current market prices from time to time through Cantor Fitzgerald & Co., as sales agent. In November 2014, we commenced sales under this program.  Through December 31, 2014, we sold 1,346,676 shares under this program for net proceeds of approximately $11.6 million (after deducting commissions and other offering expenses) and we sold an additional 28,800 and 1,189,479 shares in the three and nine months ended September 30, 2015, respectively, for net proceeds of approximately $199,000 and $10.9 million (after deducting commissions and other offering expenses).  Of the cumulative net proceeds through September 30, 2015, $9.6 million was received in 2014 and $12.9 million was received in 2015.

In January 2015, we completed a follow-on offering in which we sold 8,337,500 shares of our common stock to the public at a price of $6.50 per share, including 1,087,500 shares issued pursuant to the exercise of the underwriters’ option to purchase additional shares. The net proceeds from this offering were $50.9 million, after deducting underwriting discounts and commissions.

Reduction in force.  On October 7, 2015, we announced a reduction of workforce by approximately 50% to 20 full time employees. All affected employees will receive severance pay and outplacement assistance. As a result of the reduction in force and associated costs, we estimate annual savings of approximately $5.1 million in cash operating expenses on a going forward basis, with estimated one-time severance and related costs of $1.1 million.  Approximately $950,000 is expected to be paid over the fourth quarter of 2015 and the first quarter of 2016, with the remainder to be paid later in 2016.

Funding requirements

We currently have three product candidates currently in clinical trials. We expect our expenses to increase in connection with these and future programs. We expect to continue to incur significant expenses and operating losses for the foreseeable future. We anticipate that our expenses and operating losses will increase substantially if and as we:

·             continue our ongoing clinical trials with VS-6063, VS-5584 and VS-4718;

·             initiate additional clinical trials for our product candidates;

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

·             maintain, expand and protect our intellectual property portfolio;

·             acquire or in-license other products and technologies;

·             hire additional clinical, development and scientific personnel; and

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

We expect our existing cash, cash equivalents and investments will enable us to fund our current operating plan and capital expenditure requirements at least through the first half of 2017. We have based this estimate on assumptions that may prove to be wrong and we could use our available capital resources sooner than we currently expect. Because of the numerous risks and uncertainties associated with the development and commercialization of our product candidates, and the extent to which we may enter into collaborations with third parties for development and commercialization of our product candidates, we are unable to estimate the amounts of increased capital outlays and operating expenses associated with completing the development of our current product candidates. Our future capital requirements will depend on many factors, including:

·                  the rate and size of enrollment, results and cost of completing our ongoing clinical trials;

·                  the scope, progress and results of our ongoing and potential future clinical trials;

16

Table of Contents

·                  the extent to which we acquire or in-license other products and technologies;

·                  the costs, timing and outcome of regulatory review of our product candidates and the costs of future commercialization activities for such product candidates, for which we receive marketing approval;

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

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

·                  our ability to establish collaborations on favorable terms, if at all.

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

CONTRACTUAL OBLIGATIONS

There have been no material changes to the contractual obligations set forth in our Annual Report on Form 10-K for the year ended December 31, 2014.

OFF-BALANCE SHEET ARRANGEMENTS

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

Item 3.  Quantitative and Qualitative Disclosures About Market Risk.

We had cash, cash equivalents and investments of $120.5 million as of September 30, 2015, consisting of cash, U.S. Treasury money market funds, corporate bonds and commercial paper. Our primary exposure to market risk is interest rate sensitivity, which is affected by changes in the general level of U.S. interest rates, particularly because most of our investments are interest-bearing. Our available-for-sale securities are subject to interest rate risk and will fall in value if market interest rates increase. Due to the short-term duration of most of our investment portfolio and the low risk profile of our investments, an immediate 100 basis point change in interest rates would not have a material effect on the fair market value of our portfolio.

We contract with CROs and contract manufacturers globally. We may be subject to fluctuations in foreign currency rates in connection with these agreements. Transactions denominated in currencies other than our functional currency are recorded based on exchange rates at the time such transactions arise. As of September 30, 2015, $2.6 million of our total liabilities were denominated in currencies other than our functional currency. At this time, an immediate 10% change in currency exchange rates would not have a material effect on our financial position, results of operations or cash flows.

Item 4.  Controls and Procedures.

Evaluation of Disclosure Controls and 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 September 30, 2015. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act of 1934 (the “Exchange Act”), means

17

Table of Contents

controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. 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 September 30, 2015, 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.

Changes in Internal Control Over Financial Reporting

No change in our internal control over financial reporting occurred during the fiscal quarter ended September 30, 2015 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

18

Table of Contents

PART II—OTHER INFORMATION

Item 1.  Legal Proceedings.

None.

Item 1A.  Risk Factors.

You should carefully review and consider the information regarding certain factors that could materially affect our business, financial condition or future results set forth under Item 1A. (Risk Factors) in our Annual Report on Form 10-K for the fiscal year ended December 31, 2014, as supplemented or updated by the risk factors described below.  The updates to our risk factors below under the heading “Risks Related to the Discovery, Development and Commercialization of our Product Candidates” update the corresponding risk factor contained in our Annual Report on Form 10-K for the fiscal year ended December 31, 2014.  The updates to our risk factors below under the heading “Risks Related to Employee Matters and Managing Growth” is a new risk factor related to our organizational restructuring.

RISKS RELATED TO THE DISCOVERY, DEVELOPMENT AND COMMERCIALIZATION OF OUR PRODUCT CANDIDATES

Preclinical studies and preliminary and interim data from clinical trials of our product candidates are not necessarily predictive of the results or success of ongoing or later clinical trials of our product candidates. If we cannot replicate the results from our preclinical studies and clinical trials of our product candidates, we may be unable to successfully develop, obtain regulatory approval for and commercialize our product candidates.

Preclinical studies and any positive preliminary and interim data from our clinical trials of our product candidates may not necessarily be predictive of the results of ongoing or later clinical trials. Even if we are able to complete our planned clinical trials of our product candidates according to our current development timeline, the positive results from clinical trials of our product candidates may not be replicated in subsequent clinical trial results. Also, later -stage clinical trials could differ in significant ways from earlier stage clinical trials, which could cause the outcome of the later-stage trials to differ from our earlier stage clinical trials. For example, these differences may include changes to inclusion and exclusion criteria, efficacy endpoints and statistical design. Many companies in the pharmaceutical and biotechnology industries, including us, have suffered significant setbacks in late-stage clinical trials after achieving positive results in early-stage development.  For example, on September 28, 2015, we stopped enrollment in our Phase 2 registration-directed, double-blind, placebo-controlled study of VS-6063 for patients with mesothelioma (COMMAND) for futility after a Data Safety Monitoring Board (DSMB) review of a pre-planned interim analysis demonstrated that there was not a sufficient level of efficacy to warrant continuation of COMMAND.  We cannot be certain that we will not face similar setbacks in our ongoing clinical studies of VS-6063 in mesothelioma and in other indications as well as our clinical studies of our other product candidates. We have not completed any late-stage clinical trials for our product candidates yet, and if we fail to produce positive results in our planned clinical trials of any of our product candidates, the development timeline and regulatory approval and commercialization prospects for our product candidates, and, correspondingly, our business and financial prospects, would be materially adversely affected.

If clinical trials of our product candidates fail to demonstrate safety and efficacy to the satisfaction of regulatory authorities or do not otherwise produce positive results, we may incur additional costs or experience delays in completing, or ultimately be unable to complete, the development and commercialization of our product candidates.

Before obtaining marketing approval from regulatory authorities for the sale of our product candidates, we must complete extensive clinical trials to demonstrate the safety and efficacy of our product candidates in humans. Clinical testing is expensive, difficult to design and implement, can take many years to complete and is uncertain as to outcome. A failure of one or more clinical trials can occur at any stage of testing. The outcome of preclinical testing and early clinical trials may not be predictive of the success of later clinical trials, and interim results of a clinical trial do not necessarily predict final results. For example, the results of many of our ongoing clinical trials to date, including our Phase 2 window-of-opportunity study of VS-6063 in mesothelioma and our Phase 1/1b study of VS-6063 in ovarian cancer, are based on unaudited data provided by our clinical trial investigators. An audit of this data may change the conclusions drawn from this unaudited data indicating less promising results than we currently anticipate. In some instances, there can be significant variability in safety and/or efficacy results between different trials of the same product candidate due to numerous factors, including changes in trial protocols, differences in size and type of the patient populations, adherence to the dosing regimen and other trial protocols and the rate of dropout among clinical trial participants. We do not know whether any Phase 2, Phase 3 or other clinical trial we may conduct will demonstrate consistent or adequate efficacy and safety sufficient to obtain regulatory approval to market our product candidates.

In addition, the design of a clinical trial may determine whether its results will support approval of a product and flaws in the design of a clinical trial may not become apparent until the clinical trial is well-advanced. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that have believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of their

19

Table of Contents

products. For example, standard measures of clinical activity with respect to solid tumors, such as Response Criteria in Solid Tumors, or RECIST, measurement guidelines, which are based on gross changes in the size of tumor lesions, may not be sufficient to detect the targeting of CSCs by our product candidates.

A failure of one or more clinical trials could indicate a higher likelihood that subsequent clinical trials of the same product candidate in the same or other indications or subsequent clinical trials of other related product candidates will be unsuccessful for the same reasons as the unsuccessful clinical trials.  For example, on September 28, 2015, we stopped enrollment in COMMAND for futility after a DSMB review of a pre-planned interim analysis demonstrated that there was not a sufficient level of efficacy to warrant continuation of COMMAND. The audit of the data from COMMAND may provide additional information about VS-6063 and our other product candidates that could indicate a lower likelihood of demonstrating efficacy for VS-6063 in our ongoing clinical studies in mesothelioma and other indications as well as our clinical studies of our other product candidates

We may experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent our ability to receive marketing approval or commercialize our product candidates, including:

·      regulators or institutional review boards may not authorize us or our investigators to commence a clinical trial or conduct a clinical trial at a prospective trial site;

·      we may have delays in reaching or fail to reach agreement on clinical trial contracts or clinical trial protocols with prospective trial sites;

·      clinical trials of our product candidates may produce negative or inconclusive results, and we may decide, or regulators may require us, to conduct additional clinical trials or abandon product development programs;

·      the number of patients required for clinical trials of our product candidates may be larger than we anticipate, enrollment in these clinical trials may be slower than we anticipate or participants may drop out of these clinical trials at a higher rate than we anticipate;

·      our third-party contractors may fail to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or at all;

·      regulators or institutional review boards may require that we or our investigators suspend or terminate clinical trials for various reasons, including noncompliance with regulatory requirements or a finding that the participants are being exposed to unacceptable health risks;

·      the cost of clinical trials of our product candidates may be greater than we anticipate;

·      the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our product candidates may be insufficient or inadequate; and

·      our product candidates may have undesirable side effects or other unexpected characteristics, causing us or our investigators, regulators or institutional review boards to suspend or terminate the trials.

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

·      be delayed in obtaining marketing approval for our product candidates;

·      not obtain marketing approval at all;

·      obtain approval for indications or patient populations that are not as broad as intended or desired;

·      obtain approval with labeling that includes significant use or distribution restrictions or safety warnings, including boxed warnings;

·      be subject to additional post-marketing testing requirements; or

20

Table of Contents

·      have the product removed from the market after obtaining marketing approval.

We are currently conducting clinical studies of our product candidates. The FDA and foreign regulatory authorities may determine that the results from our ongoing trials do not support regulatory approval and may require us to conduct an additional clinical trial or trials. If these agencies take such a position, the costs of development of our product candidates could increase materially and its potential market introduction could be delayed. The regulatory agencies could also require that we conduct additional clinical, nonclinical or manufacturing validation studies and submit that data before it will consider an NDA application. Our product development costs will also increase if we experience delays in clinical testing or marketing approvals. We do not know whether any clinical trials will begin as planned, will need to be restructured or will be completed on schedule, or at all. Significant clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize our product candidates or allow our competitors to bring products to market before we do and impair our ability to successfully commercialize our product candidates and may harm our business and results of operations.

Our approach to the discovery and development of product candidates that target CSCs is unproven, and we do not know whether we will be able to develop any products of commercial value.

We are discovering and developing product candidates to treat cancer by the targeted killing of cancer stem cells. Research on CSCs is an emerging field and, consequently, there is ongoing debate regarding the existence of CSCs, whether the appropriate nomenclature to refer to these cells is cancer stem cells, tumor-initiating cells or another term and the importance of these cells as an underlying cause of tumor recurrence and metastasis.

Although there is general consensus that some cancer cells have tumor- initiating capacity, there also is some debate in the scientific community regarding the defining characteristics of these cells, which we call CSCs, and the origin of these cells. Some believe that normal adult stem cells mutate and transform into CSCs. Others believe that all cancer cells have tumor-initiating capabilities, these capabilities cannot be attributed to a factor intrinsic to a particular cell and, therefore, a definitive CSC cannot be isolated or targeted. We believe that the discovery by our scientific co-founders of the link between the epithelial-to-mesenchymal transition, or EMT, and the emergence of cancer stem cells is one way a cancer cell can transition to a CSC, but this view is not universally accepted. In addition, some believe that targeting CSCs should be sufficient for a positive clinical outcome, while others believe that, at times or always, targeting CSCs should be coupled with targeting tumor bulk for a positive clinical outcome.

Even if our beliefs regarding the existence, characteristics and function of CSCs are correct, any products that we develop may not effectively target CSCs. We do not believe that any drugs that target CSCs have been successfully developed to date for the treatment of cancer. While we are currently conducting clinical trials for product candidates that we believe target CSCs, we may not ultimately be successful in demonstrating their efficacy, alone or in combination with other treatments.

On September 28, 2015, we stopped enrollment in COMMAND for futility after a DSMB review of a pre-planned interim analysis demonstrated that there was not a sufficient level of efficacy to warrant continuation of COMMAND.  VS-6063 is currently in a Phase 2 study in patients with non-small cell lung cancer, a Phase 2 trial preceding surgery in mesothelioma, a Phase 1b trial in combination with weekly paclitaxel for patients with ovarian cancer, and a combination trial of VS-6063 and VS-5584 in patients with relapsed mesothelioma.  Given the futility of COMMAND, our ongoing clinical studies of VS-6063 in mesothelioma and other indications may not be successful.  Additionally, the futility of COMMAND could indicate that targeting CSCs is not sufficient for a positive clinical outcome or that the mechanism used by VS-6063 and our other product candidates is not an effective mechanism to target CSCs and our ongoing clinical studies of VS-6063 and our other product candidates may not be successful.

21

Table of Contents

RISKS RELATED TO EMPLOYEE MATTERS AND MANAGING GROWTH

We may experience difficulties in managing restructurings.

In October 2015, we undertook an organizational restructuring that reduced our workforce by approximately 50%. Effecting any restructuring places significant strains on management, our employees and our operational, financial and other resources. Furthermore, restructurings take time to fully implement and involve certain additional costs, including severance payments to terminated employees, and we may also incur liabilities from early termination or assignment of contracts, potential litigation or other effects from such restructuring. Such effects from our restructuring program could have a material adverse affect on our ability to execute on our business plan. There can be no assurance that we will be successful in implementing our restructuring program.

Future growth would impose significant added responsibilities on members of management, including the need to identify, recruit, maintain and integrate additional employees. Our future financial performance and our ability to develop our product candidates or additional assets will depend, in part, on our ability to effectively manage any future growth or restructuring, as the case may be.

There have been no additional material changes from the factors disclosed in our 2014 Annual Report on Form 10-K, although we may disclose changes to such factors or disclose additional factors from time to time in our future filings with the Securities and Exchange Commission.

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds.

RECENT SALES OF UNREGISTERED SECURITIES

None.

PURCHASE OF EQUITY SECURITIES

We did not purchase any of our registered equity securities during the period covered by this Quarterly Report on Form 10-Q.

Item 3.  Defaults Upon Senior Securities.

None.

Item 4.  Mine Safety Disclosures.

None.

Item 5.  Other Information.

The following disclosure is provided in accordance with and in satisfaction of the requirements of Item 2.02 “Results of Operations and Financial Condition” of Form 8-K:

On November 9, 2015, Verastem, Inc. announced its financial results for the quarter ended September 30, 2015 and commented on certain corporate accomplishments and plans. The full text of the press release issued in connection with the announcement is furnished as Exhibit 99.1 hereto.

22

Table of Contents

The information furnished in Item 5 (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Item 6.  Exhibits.

The exhibits filed as part of this Quarterly Report on Form 10-Q are set forth on the Exhibit Index, which Exhibit Index is incorporated herein by reference.

23

Table of Contents

SIGNATURES

Pursuant to the requirements 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.

24

Table of Contents

EXHIBIT INDEX

†                                         Filed herewith.

25

Exhibit 31.1

CERTIFICATIONS

I, Robert Forrester, certify that:

1.                                      I have reviewed this Quarterly Report on Form 10-Q of Verastem, Inc.;

2.                                      Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.                                      Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.                                      The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)                                     Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)                                     Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)                                      Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)                                     Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.                                      The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)                                     All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)                                     Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 9, 2015

1

Exhibit 31.2

CERTIFICATIONS

I, John B. Green, certify that:

1.                                      I have reviewed this Quarterly Report on Form 10-Q of Verastem, Inc.;

2.                                      Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.                                      Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.                                      The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)                                     Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)                                     Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)                                      Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)                                     Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.                                      The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)                                     All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)                                     Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 9, 2015

1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Verastem, Inc. (the “Company”) for the period ended September 30, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, President and Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

(1)                                 the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)                                 the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 9, 2015

1

Exhibit 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Verastem, Inc. (the “Company”) for the period ended September 30, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, John B. Green, Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

(1)                                 the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)                                 the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 9, 2015

1

Exhibit 99.1

Verastem Reports Third Quarter 2015 Financial and Corporate Results

BOSTON, MA — November 9, 2015 — Verastem, Inc. (NASDAQ: VSTM), focused on discovering and developing drugs to treat cancer by the targeted killing of cancer stem cells, today reported financial results for the third quarter ended September 30, 2015, and also provided an overview of certain corporate developments.

“Our mission is to improve survival and the quality of life for patients battling cancer through the combination of our cancer stem cell-targeting agents with current and emerging standard of care treatments,” said Robert Forrester, President and Chief Executive Officer of Verastem.  “We are supported by a strong balance sheet, three clinical compounds and a team of talented and dedicated professionals. We continue to believe in our pipeline candidates and are focused on executing their clinical development.”

Mr. Forrester continued:  “We are working with thought-leading researchers on innovative anti-cancer applications for our compounds. For example, researchers from the University of Edinburgh recently published a ground-breaking paper in “Cell” which highlights the potential of focal adhesion kinase (FAK) inhibition to enable the body’s immune system to better fight cancer. While this is early stage data, it provides support for the thesis that FAK inhibitors may be useful in combination with immuno-oncology agents with the goal of yielding more durable responses for a greater number of cancer patients.”

Recent Developments

Stopped Enrollment in the COMMAND Study Evaluating VS-6063 in Mesothelioma Due to Futility — In September 2015, Verastem announced its decision to stop enrollment in the Phase 2 registration-directed, double-blind, placebo-controlled study (COMMAND) of VS-6063 for patients with mesothelioma.  The decision to stop enrollment followed a Data Safety Monitoring Board (DSMB) review of a pre-planned interim analysis. The results of the analysis demonstrated that VS-6063 had a generally well tolerated safety profile but that there was not a sufficient level of efficacy to warrant continuation of the study.

New Research Published in the Journal “Cell” Highlighting the Potential of FAK Inhibition to Enhance the Efficacy of Anti-Tumor Immunotherapy — In September 2015, Verastem announced that researchers from the University of Edinburgh published a study in the journal “Cell” which discusses results from preclinical research showing that focal adhesion kinase (FAK), a protein which is often overproduced in tumors, enables cancer cells to evade attack by the body’s immune system.  In this study, researchers discovered that FAK inhibition can favorably modulate the balance of immune cells in the tumor, inducing immune-mediated tumor elimination in preclinical models.

Presented Data on VS-6063, VS-4718 and VS-5584 at Key Oncology-Focused Medical Meetings — In November 2015, Verastem presented a total of six posters at the 2015 AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics and the Society for Immunotherapy of Cancer (SITC) 30th Anniversary Annual Meeting.  The presented data described the results of preclinical research showing that FAK inhibitors may enhance the effects of anti-cancer immunotherapy for both typically responsive and non-responsive tumors.

1

During the third quarter, Verastem also gave several oral and poster presentations at the European Society for Medical Oncology (ESMO)/18th European Cancer Congress (ECC) and at the 16th World Conference on Lung Cancer (WCLC) describing clinical and preclinical data relating to its pipeline product candidates.

All of the posters and presentations can be found on the Presentations page of Verastem’s website.

Third Quarter 2015 Financial Results

As of September 30, 2015, Verastem had cash, cash equivalents and investments of $120.5 million compared to $92.7 million as of December 31, 2014.  Verastem used $11.6 million for operating activities in the third quarter ended September 30, 2015 (the “2015 Quarter”).

Net loss for the 2015 Quarter was $15.4 million, or $0.42 per share, as compared to a net loss of $13.3 million, or $0.52 per share, for the same period in 2014 (the “2014 Quarter”).  Net loss includes stock-based compensation expense of $2.1 million and $2.8 million for the 2015 Quarter and 2014 Quarter, respectively.

Research and development expense for the 2015 Quarter was $11.3 million compared to $9.0 million for the 2014 Quarter.  The $2.3 million increase from the 2014 Quarter to the 2015 Quarter was primarily related to an increase of $2.3 million in contract research organization expense for outsourced biology, chemistry, development and clinical services, which includes our clinical trial costs.

General and administrative expense for the 2015 Quarter was $4.2 million compared to $4.3 million for the 2014 Quarter.

The number of outstanding common shares as of September 30, 2015, was 36,934,804.

Financial Guidance

We expect our existing cash, cash equivalents and investments will enable us to fund our current operating plan and capital expenditure requirements at least through the first half of 2017.

About VS-6063

VS-6063 (defactinib) is an orally available compound designed to target cancer stem cells through the potent inhibition of focal adhesion kinase (FAK). Cancer stem cells are an underlying cause of tumor resistance to chemotherapy, recurrence and ultimate disease progression. Research has demonstrated that FAK activity is critical for the growth and survival of cancer stem cells. VS-6063 is currently being

2

studied in the “Window of Opportunity” study in patients with mesothelioma prior to surgery, a Phase 1/1b study in combination with paclitaxel in patients with ovarian cancer, a trial in patients with KRAS-mutated non-small cell lung cancer and a trial evaluating the combination of VS-6063 and VS-5584 in patients with relapsed mesothelioma.

About VS-4718

VS-4718 is an orally available compound designed to target cancer stem cells through the potent inhibition of focal adhesion kinase (FAK). VS-4718 is currently being studied in a Phase 1 dose escalation study in patients with advanced cancers.

About VS-5584

VS-5584 is an orally available compound that has demonstrated potent and highly selective activity against class 1 PI3K enzymes and dual inhibitory actions against mTORC1 and mTORC2. In preclinical studies, VS-5584 has been shown to reduce the percentage of cancer stem cells and induce tumor regression in chemotherapy-resistant models. Verastem is currently conducting a dose escalation trial of VS-5584 in patients with advanced solid tumors as a single agent and a combination trial of VS-5584 and VS-6063 in patients with relapsed mesothelioma. VS-5584 has been granted orphan drug designation for use in mesothelioma in the U.S. and EU.

About Verastem, Inc.

Verastem, Inc. (NASDAQ:VSTM) is discovering and developing drugs to treat cancer by the targeted killing of cancer stem cells. Cancer stem cells are an underlying cause of tumor recurrence and metastasis. Verastem is developing small molecule inhibitors of signaling pathways that are critical to cancer stem cell survival and proliferation: FAK and PI3K/mTOR. For more information, please visit www.verastem.com.

Forward-looking statements:

This press release includes forward-looking statements about Verastem’s strategy, future plans and prospects, including statements regarding the development and activity of Verastem’s product candidates, VS-6063, VS-4718 and VS-5584, and Verastem’s FAK, PI3K/mTOR and diagnostics programs generally, the utility of FAK inhibitors for the treatment of cancer, the timeline for clinical development and regulatory approval of our product candidates, the structure of our planned or pending clinical trials, our rights to develop or commercialize our product candidates and our ability to finance contemplated development activities and fund operations for a specified period. The words “anticipate,” “appear,” “believe,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “target,” “potential,” “will,” “would,” “could,” “should,” “continue,” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Each forward-looking statement is subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied in such statement. Applicable risks and uncertainties include the risks that the preclinical testing of Verastem’s product candidates and preliminary or interim data from clinical trials may not be predictive of the results or success of ongoing or later clinical trials, that data may not be available when we expect it to be, that enrollment of clinical trials may take longer than expected, that our product candidates will cause unexpected safety events, that Verastem will be unable to successfully initiate or complete the clinical development of its product candidates, that the development of Verastem’s product candidates will take longer or cost more than

3

planned, and that Verastem’s product candidates will not receive regulatory approval or become commercially successful products. Other risks and uncertainties include those identified under the heading “Risk Factors” in Verastem’s Annual Report on Form 10-K for the year ended December 31, 2014, Verastem’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2015 and in any subsequent SEC filings. The forward-looking statements contained in this press release reflect Verastem’s current views with respect to future events, and Verastem does not undertake and specifically disclaims any obligation to update any forward-looking statements.

Verastem, Inc.

Brian Sullivan, 781-292-4214

bsullivan@verastem.com

4

Verastem, Inc.

Unaudited Selected Consolidated Balance Sheet Information

(in thousands)

5

Verastem, Inc.

Unaudited Condensed Consolidated Statements of Operations

(in thousands, except per share amounts)

6