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

FORM 10-Q

Commission file number: 001-35403

Verastem, Inc.
(Exact name of registrant as specified in its charter)

(617) 252-9300
(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 ý    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 ý    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 ý

        As of July 31, 2013 there were 25,593,992 shares of Common Stock, $0.0001 par value per share, outstanding.

   

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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 of historical facts, contained in this Quarterly Report on Form 10-Q, including statements regarding our strategy, future operations, future financial position, future revenues, projected costs, prospects, plans and objectives of management, including the development of our compounds, the timeline for clinical development and regulatory approval of our compounds, the structure of our planned clinical trials and our ability to fund operations, are forward looking statements. 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 potential 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 outcome of research and development activities and the fact that the preclinical and clinical testing of our compounds may not be predictive of the success of later clinical trials, 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 and other filings with the Securities and Exchange Commission, or 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.

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PART I—FINANCIAL INFORMATION

Item 1.    Condensed Consolidated Financial Statements (Unaudited).

Verastem, Inc.

(A development stage company)

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited)

(in thousands, except per share amounts)

   

See accompanying notes.

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Verastem, Inc.

(A development stage company)

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(unaudited)

(in thousands, except per share amounts)

   

See accompanying notes.

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Verastem, Inc.

(A development stage company)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited)

(in thousands)

   

See accompanying notes.

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Verastem, Inc.

(A development stage company)

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 of assets, liabilities, revenues, expenses and related disclosures at the date of the financial statements. Actual results could differ from those estimates. Additionally, operating results for the three months ended June 30, 2013 are not necessarily indicative of the results that may be expected for any other interim period or for the fiscal year ending December 31, 2013. 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, 2012 as filed with the Securities and Exchange Commission ("SEC") on March 26, 2013.

Subsequent Events

        In preparing the financial statements included in this Form 10-Q, the Company has evaluated all subsequent events that occurred after June 30, 2013 through the date of the filing of this Form 10-Q. In July 2013, the Company closed a public offering in which it sold 4,255,000 shares of its common stock at a price of $15 per share (Note 7).

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 is now established that 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:

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Verastem, Inc.

(A development stage company)

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2. Fair value of financial instruments (Continued)

        The following table presents information about the Company's financial assets and liabilities that have been measured at fair value at June 30, 2013 and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands).

        The following table presents information about the Company's financial assets that have been measured at fair value at December 31, 2012 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 and commercial paper of publicly traded companies secured by the U.S. government. 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

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Verastem, Inc.

(A development stage company)

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2. Fair value of financial instruments (Continued)

Company did not adjust or override any fair value measurements provided by the pricing services as of June 30, 2013.

        The Company's liability classified stock-based compensation awards are comprised of restricted stock units 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.

3. Investments

        The Company's investments are classified as available-for-sale pursuant to Accounting Standards Codification (ASC) 320, Investments—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 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 six months ended June 30, 2013 and 2012 or for the period from August 4, 2010 (inception) to June 30, 2013. The Company recorded ($25,000), ($9,000), ($21,000), $34,000 and ($3,000) of unrealized gains/(losses) during the six months ended June 30, 2013 and 2012, three months ended June 30, 2013 and 2012, and the period from August 4, 2010 (inception) to June 30, 2013, 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 six months ended June 30, 2013 or 2012 or for the period from August 4, 2010 (inception) to June 30, 2013. 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 June 30, 2013, 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.

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Verastem, Inc.

(A development stage company)

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

3. Investments (Continued)

        Cash, cash equivalents and investments at June 30, 2013 and December 31, 2012 consist of the following (in thousands):

 

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Verastem, Inc.

(A development stage company)

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

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 applicable to common stockholders 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, unvested restricted stock and unvested restricted stock units 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 due to their 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 reserved under the 2012 Plan was the sum of 3,428,571 shares plus the number of shares available under the 2010 Equity Incentive Plan (the 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

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Verastem, Inc.

(A development stage company)

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

6. Stock-based compensation (Continued)

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, 2013, the shares available under the 2012 Plan increased by 844,448 shares of common stock.

Restricted stock

        A summary of the Company's nonvested restricted stock as of June 30, 2013 and changes during the six months ended June 30, 2013 is as follows:

        As of June 30, 2013, there was $4.4 million of total unrecognized stock-based compensation expense related to non-vested restricted stock. The expense is expected to be recognized over a weighted average period of 1.3 years.

        A summary of the Company's nonvested restricted stock units (RSUs) as of June 30, 2013 and changes during the six months ended June 30, 2013 is as follows:

        As of June 30, 2013, there was $6.5 million of total unrecognized stock-based compensation expense related to non-vested RSUs granted under the 2012 Plan. The expense is expected to be recognized over a weighted-average period of 2.5 years.

        During the first quarter of 2013, the Company amended the terms of certain RSUs related to a total of 657,058 shares of common stock to allow for 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 six months ended June 30, 2013, the Company deposited with tax authorities $55,000 and $829,000, respectively, to settle the tax liability for awards

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Verastem, Inc.

(A development stage company)

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

6. Stock-based compensation (Continued)

that settled during the respective periods. The liability related to these awards is recorded within other current liabilities on the consolidated balance sheet as of June 30, 2013.

Stock options

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

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

7. Subsequent Events

        In July 2013, the Company closed a public offering in which it sold 4,255,000 shares of its common stock to the public at a price of $15 per share, including 555,000 shares issued pursuant to the exercise of the underwriters' option to purchase additional shares. This offering was completed under the shelf registration statement that was filed on Form S-3 and declared effective by the Securities Exchange Commission on February 14, 2013. The net proceeds from this offering were approximately $59.8 million, after deducting underwriting discounts and commissions and other offering expenses payable by the Company.

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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.

OVERVIEW

        We are a clinical biopharmaceutical company focused on discovering and developing drugs to treat cancer by the targeted killing of cancer stem cells. We also develop proprietary companion diagnostics. 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. We have proprietary technology to create a stable population of cancer stem cells that we use to screen for and identify small molecule compounds that target cancer stem cells. Our most advanced programs target the Focal Adhesion Kinase, or FAK, and the PI3K/mTOR signaling pathways. Our lead FAK inhibitor, VS-6063, is currently in Phase 1/1b testing in combination with weekly paclitaxel in ovarian cancer and we expect to initiate a registration directed trial of VS-6063 in mesothelioma in the third quarter of 2013. VS-6063 has been assigned defactinib as the United States Adopted Name (USAN). We have received orphan drug designation for the use of VS-6063 in mesothelioma in the European Union and in the United States. We plan to initiate a Phase 1 study of VS-6063 in Japan in the third quarter of 2013 with the goal of including Japanese sites into the registration driven mesothelioma trial. In addition we expect to start a Phase 2 study of VS-6063 in non-small cell lung cancer in the third quarter of 2013. In addition to VS-6063, our FAK inhibitor VS-4718 is in a Phase 1 clinical trial in patients with advanced cancers and we expect our dual mTORC1/2 and PI3K inhibitor VS-5584 to enter a Phase 1 clinical trial in patients with advanced cancers in the fourth quarter of 2013.

        We commenced active operations in the second half of 2010. Our operations to date have been limited to organizing and staffing our company, business planning, raising capital, acquiring and developing our technology, identifying potential product candidates, undertaking preclinical studies of our most advanced product candidates and, conducting clinical trials for VS-6063 and VS-4718. As of June 30, 2013, we have not generated any revenues and have financed our operations with net proceeds from the private placement of our preferred stock and our initial public offering. We have raised additional proceeds in July 2013 from a follow-on offering of our common stock.

        As of June 30, 2013, we had a deficit accumulated during the development stage of $65.7 million. We had net losses of $19.3 million, $13.7 million and $65.7 million for the six months ended June, 2013 and 2012 and for the period from August 4, 2010 (inception) to June 30, 2013. We expect to incur significant expenses and increasing operating losses for the foreseeable future. We expect our expenses to increase in connection with our ongoing activities, particularly as we continue the research and development and initiate clinical trials of, and seek marketing approval for, our product candidates. In addition, if we obtain marketing approval for any of our product candidates, we expect to incur significant commercialization expenses related to product sales, marketing, manufacturing and distribution. 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.

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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, 2012 related to accrued research and development expenses and stock-based compensation. There were no changes to these critical accounting policies in the three and six months ended June 30, 2013. 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 26, 2013.

        The Company has elected to follow the extended transition period guidance provided for in Securities Act Section 7(a)(2)(B) 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 June 30, 2013 and June 30, 2012

        Research and development expense.    Research and development expense for the three months ended June 30, 2013 (2013 Quarter) was $6.0 million compared to $4.7 million for the three months ended June 30, 2012 (2012 Quarter). The $1.3 million increase from the 2012 Quarter to the 2013 Quarter was primarily related to an increase of $1.1 million in contract research organization expense for outsourced biology, chemistry and development services, a $407,000 increase in personnel costs primarily due to increased headcount and a $235,000 increase in stock-based compensation expense. These increases were partially offset by a decrease of $365,000 in license fee expense primarily related to the upfront payment made to S*Bio Pte Ltd. (S*Bio) in the 2012 Quarter.

        General and administrative expense.    General and administrative expense for the 2013 Quarter was $4.2 million compared to $2.2 million for the 2012 Quarter. The $2.0 million increase from the 2012 Quarter to the 2013 Quarter primarily resulted from an increase of $971,000 in stock-based compensation expense associated with restricted stock units and restricted stock units with performance-based vesting provisions, an increase in professional fees and other costs of $624,000, a $266,000 increase in corporate franchise taxes and an increase in consulting fees of $166,000.

        Interest income.    Interest income decreased to $34,000 for the 2013 Quarter from $71,000 for the 2012 Quarter. This decrease was due to an average lower cash balance for the 2013 Quarter compared to the 2012 Quarter.

Comparison of the Six Months ended June 30, 2013 and June 30, 2012

        Research and development expense.    Research and development expense for the six months ended June 30, 2013 (2013 Period) was $11.3 million compared to $9.5 million for the six months ended June 30, 2012 (2012 Period). The $1.8 million increase from the 2012 Period to the 2013 Period was primarily related to an increase of $1.7 million in contract research organization expense for outsourced biology, chemistry and development services, a $791,000 increase in personnel costs primarily due to increased headcount and a $160,000 increase in stock-based compensation expense. These increases were partially offset by a decrease of $732,000 in license fee expense primarily related to the

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revaluation of the obligation to issue the warrant to Poniard Pharmaceuticals in the 2012 Period associated with the license and the upfront payment to S*Bio.

        General and administrative expense.    General and administrative expense for the 2013 Period was $8.0 million compared to $4.3 million for the 2012 Period. The $3.7 million increase from the 2012 Period to the 2013 Period primarily resulted from an increase of $2.0 million in stock-based compensation expense associated with restricted stock units and restricted stock units with performance-based vesting provisions, an increase in professional fees and other costs of $1.1 million, an increase in consulting fees of $277,000 and a $226,000 increase in corporate franchise taxes.

        Interest income.    Interest income decreased to $78,000 for the 2013 Period from $128,000 for the 2012 Period. This decrease was due to a lower cash balance for the 2013 Period compared to the 2012 Period.

LIQUIDITY AND CAPITAL RESOURCES

Sources of liquidity

        As of June 30, 2013, we have not generated any revenues. Since our inception in August 2010, we have financed our operations principally through private placements and our initial public offering. We have raised additional proceeds in July 2013 from a follow-on offering of our common stock. As of June 30, 2013, we had $78 million in cash, cash equivalents, and investments. We primarily invest our cash, cash equivalents and investments in a U.S. Treasury money market fund, government-sponsored enterprise securities and commercial paper.

        In July 2013, we closed a public offering in which we sold 4,255,000 shares of common stock at a price of $15 per share, including 555,000 shares issued pursuant to the exercise of the underwriters' option to purchase additional shares. This offering was completed under the shelf registration statement that was filed on Form S-3 and declared effective by the Securities Exchange Commission on February 14, 2013. The net proceeds to the Company from this offering were approximately $59.8 million, after deducting underwriting discounts and commissions and other offering expenses payable by the Company.

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 significant increase in cash used in operating activities for the 2013 Period compared to the 2012 Period is due to an increase in research and development expenses as we increased our research and development headcount and increased spending on external research and development costs.

        Investing activities.    The cash provided by investing activities for the 2013 Period reflects the net maturities of investments of $17.3 million. The cash used in investing activities for the 2012 Period reflects the net purchases of investments of $52.9 million and the purchase of $167,000 of property and equipment.

        Financing activities.    The cash used in financing activities for the 2013 Period reflects cash used to pay tax withholdings for certain restricted stock units that were net settled by employees. The cash provided by financing activities in the 2012 Period reflects the net proceeds from our initial public offering less issuance costs paid in prior periods.

Funding requirements

        We expect our existing cash, cash equivalents and investments, including proceeds from our July 2013 public offering, will enable us to fund our current operating plan and capital expenditure

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requirements through the first half of 2016. 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 scope, progress, results and costs of compound discovery, preclinical development, laboratory testing and clinical trials for our product candidates;



•

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;



•

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



•

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



•

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.

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 are exposed to market risk related to changes in interest rates. We had cash, cash equivalents and investments of $78 million as of June 30, 2013, consisting of cash, U.S. Treasury money market fund, government-sponsored enterprise securities 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 in short-term securities. Our available-for-sale

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securities are subject to interest rate risk and will fall in value if market interest rates increase. Due to the short-term duration 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 the functional currency are recorded based on exchange rates at the time such transactions arise. As of June 30, 2013, approximately $573,000 of our total liabilities were denominated in currencies other than the functional currency.

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 June 30, 2013. 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 a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC's rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company's management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. 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 June 30, 2013, 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 June 30, 2013 that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.

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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, 2012. There have been no material changes from the factors disclosed in our 2012 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.

USE OF PROCEEDS FROM REGISTERED SECURITIES

        In February 2012, we completed an initial public offering of 6,325,000 shares of our common stock at a price of $10.00 per share for an aggregate offering price of $63.3 million. The offer and sale of all of the shares in the offering were registered under the Securities Act pursuant to a registration statement on Form S-1 (File No. 333-177677), which was declared effective by the SEC on January 26, 2012, and a registration statement on Form S-1 (File No. 333-179910) filed pursuant to Rule 462(b) of the Securities Act.

        As of June 30, 2013, we have used approximately $36 million of the net proceeds primarily to fund the preclinical and clinical development of our lead product candidates, to advance and expand the research,preclinical and clinical development of additional product candidates and companion diagnostics and for working capital, capital expenditures and other general corporate purposes. We have invested the balance of the net proceeds from the offering in a variety of capital preservation investments, including investment grade, interest bearing instruments and U.S. government securities. There has been no material change in our planned use of the balance of the net proceeds from the offering as described in our final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act.

Item 3.    Defaults Upon Senior Securities.

        None.

Item 4.    Mine Safety Disclosures.

        None.

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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 August 13, 2013, Verastem, Inc. announced its financial results for the quarter ended June 30, 2013 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.

        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.

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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.

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EXHIBIT INDEX

        In accordance with Rule 406T of Regulation S-T, the XBRL related information in Exhibit 101 to this Quarterly Report on Form 10-Q is deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act, is deemed not filed for purposes of Section 18 of the Exchange Act, and otherwise is not subject to liability under these sections.

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