What SEC filings does Verastem, Inc. submit to the SEC?

Verastem, Inc. (VSTM) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about VSTM?

A Form 4 for VSTM discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Verastem, Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for VSTM?

The 10-K is Verastem, Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all VSTM SEC filings directly on EDGAR?

You can view all historical Verastem, Inc. filings on the SEC EDGAR company page for VSTM. Each filing card on this page links directly to the original SEC document.

How often does Verastem, Inc. file with the SEC?

Verastem, Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling VSTM shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

VSTM SEC Filing News — Verastem, Inc.

Latest SEC filings for Verastem, Inc. (VSTM) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-14.

Verastem, Inc., a development-stage biopharmaceutical company, focuses on developing and commercializing drugs for the treatment of cancer in the United States. Its product candidates are Avutometinib, which is an orally administered, small molecule dual RAF/MEK inhibitor developed to block MEK kinase activity and the compensatory reactivation of MEK by upstream RAF, thereby targeting the RAS/MAPK signaling pathway that is commonly activated in various cancers; and Defactinib, an oral small mole…

Sector: Healthcare Industry: Biotechnology Market Cap: $780.7M

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for VSTM currently lean bearish. Of the 20 filing records displayed, 6 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

VSTM Filing Activity Snapshot 2026-05-26 — 2026-10-14

Insider Transactions (Form 4)

0 buys vs 6 sells

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$353.0K

Dan Paterson · 2026-10-01

44,121 shares · Form 144

Form 144 Notices

Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 8 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 8 filings in this group are Form 4s for Verastem, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 8 insider filings shown, the breakdown is 6 open-market sale and 2 compensation award. 6 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Open-market sale ×6: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Compensation award ×2: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Form 4 Open-market sale Insider Selling 2026-10-02

VSTM insider Paterson Dan (Director, President and CEO) sold 44,121 shares (~$353.0K)

Paterson Dan, listed as Director, President and CEO at Verastem, Inc., reported an open-market sale of 44,121 VSTM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	106,893	—	—
`S`	Open-market sale	44,121	$8.00	$353.0K

Filing: Form 4 (Insider Transaction) Insider: Paterson Dan (Director, President and CEO) Shares: 44,121 Est. Value: $353.0K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-10-02

VSTM insider Calkins Daniel (Chief Financial Officer) sold 2,566 shares (~$20.5K)

Calkins Daniel, listed as Chief Financial Officer at Verastem, Inc., reported an open-market sale of 2,566 VSTM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	8,333	—	—
`S`	Open-market sale	2,566	$8.00	$20.5K

Filing: Form 4 (Insider Transaction) Insider: Calkins Daniel (Chief Financial Officer) Shares: 2,566 Est. Value: $20.5K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-09-23

VSTM insider Calkins Daniel (Chief Financial Officer) sold 55 shares (~$423.50)

Calkins Daniel, listed as Chief Financial Officer at Verastem, Inc., reported an open-market sale of 55 VSTM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	55	$7.70	$423.50

Filing: Form 4 (Insider Transaction) Insider: Calkins Daniel (Chief Financial Officer) Shares: 55 Est. Value: $423.50

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-05

VSTM insider Paterson Dan (Director, President and CEO) sold 1,302 shares (~$7.6K)

Paterson Dan, listed as Director, President and CEO at Verastem, Inc., reported an open-market sale of 1,302 VSTM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	1,302	$5.81	$7.6K

Filing: Form 4 (Insider Transaction) Insider: Paterson Dan (Director, President and CEO) Shares: 1,302 Est. Value: $7.6K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-06-24

VSTM insider Paterson Dan (Director, President and CEO) sold 20,871 shares (~$87.2K)

Paterson Dan, listed as Director, President and CEO at Verastem, Inc., reported an open-market sale of 20,871 VSTM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	20,871	$4.18	$87.2K

Filing: Form 4 (Insider Transaction) Insider: Paterson Dan (Director, President and CEO) Shares: 20,871 Est. Value: $87.2K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-06-24

VSTM insider Calkins Daniel (Chief Financial Officer) sold 4,089 shares (~$17.1K)

Calkins Daniel, listed as Chief Financial Officer at Verastem, Inc., reported an open-market sale of 4,089 VSTM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	4,032	$4.18	$16.9K
`S`	Open-market sale	57	$4.13	$235.41

Filing: Form 4 (Insider Transaction) Insider: Calkins Daniel (Chief Financial Officer) Shares: 4,089 Est. Value: $17.1K

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-05-27

VSTM insider Form 4 filed for equity award, exercise, or tax withholding

BAILEY MICHAEL P (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	108,000	—	—

Filing: Form 4 (Insider Transaction) Insider: BAILEY MICHAEL P (Director) Shares: 108,000

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-05-26

VSTM insider Form 4 filed for equity award, exercise, or tax withholding

Tollefson Karin Anna (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	36,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Tollefson Karin Anna (Director) Shares: 36,000

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 5 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Verastem, Inc. has 5 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-10-01

VSTM Form 144 filed for proposed insider sale by Dan Paterson (44,121 shares) ~$353.0K

Dan Paterson filed a Form 144 with the SEC indicating intent to sell VSTM (Verastem, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Dan Paterson Shares: 44,121 Est. Value: $353.0K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-07-23

VSTM Form 144 filed for proposed insider sale by Gagnon Robert E. (31,924 shares) ~$188.0K

Gagnon Robert E. filed a Form 144 with the SEC indicating intent to sell VSTM (Verastem, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Gagnon Robert E. Shares: 31,924 Est. Value: $188.0K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-06-25

VSTM Form 144 filed for proposed insider sale by Gagnon Robert E. (21,492 shares) ~$90.5K

Filing: Form 144 (Proposed Sale Notice) Insider: Gagnon Robert E. Shares: 21,492 Est. Value: $90.5K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-06-22

VSTM Form 144 filed for proposed insider sale by Dan Paterson (20,871 shares) ~$87.2K

Filing: Form 144 (Proposed Sale Notice) Insider: Dan Paterson Shares: 20,871 Est. Value: $87.2K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-05-27

VSTM Form 144 filed for proposed insider sale by Gagnon Robert E. (20,103 shares) ~$87.6K

Filing: Form 144 (Proposed Sale Notice) Insider: Gagnon Robert E. Shares: 20,103 Est. Value: $87.6K

View on SEC EDGAR → Open Filing Document →

Material Events 6 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 6 in this period for Verastem, Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-10-14