[424B5] Verastem, Inc. Prospectus Supplement (Debt Securities)
Verastem, Inc. (VSTM) launched a preliminary prospectus supplement under Rule 424(b)(5) for a primary offering of common stock. The company also granted underwriters a 30‑day option to purchase additional shares, subject to customary underwriting discounts and commissions.
The company states its common stock last closed at $8.51 on The Nasdaq Capital Market on November 12, 2025. Net proceeds are intended to fund commercial activities for the AVMAPKI FAKZYNJA CO‑PACK in low‑grade serous ovarian cancer, continue clinical R&D for avutometinib, defactinib and VS‑7375, and for working capital and general corporate purposes.
As context, shares outstanding were 66,748,846 as of September 30, 2025. The prospectus notes a 60‑day lock‑up for the company and its directors and officers, with Jefferies, Guggenheim and Cantor as bookrunners. AVMAPKI FAKZYNJA CO‑PACK received FDA accelerated approval on May 8, 2025 for KRAS‑mutant recurrent LGSOC, with continued approval contingent on confirmatory data.
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Insights
Primary stock sale to fund commercialization and R&D; routine dilution risk.
Verastem filed a preliminary 424(b)(5) for a primary common stock offering, with a 30‑day underwriters’ option. Proceeds are earmarked for commercial rollout of AVMAPKI FAKZYNJA CO‑PACK in LGSOC and continued development of avutometinib, defactinib and VS‑7375. This aligns funding with the May
The excerpt lists 66,748,846 shares outstanding as of September 30, 2025 as a baseline and highlights a 60‑day lock‑up for the company and insiders. Equity raises can be dilutive, but actual dilution depends on final size and pricing, which are not specified here.
Key items to track when finalized include the offering size, per‑share pricing relative to the
Registration No. 333-275408
(To Prospectus dated November 20, 2023)
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Per Share
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Total
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Public offering price
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$
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$
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Underwriting discounts and commissions(1)
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$
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$
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Proceeds to Verastem, Inc., before expenses
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$
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$
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| | Jefferies | | |
Guggenheim Securities
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Cantor
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Page
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About This Prospectus Supplement
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Prospectus Supplement Summary
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The Offering
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Risk Factors
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Special Note Regarding Forward-Looking Statements
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Use of Proceeds
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Dilution
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Underwriting
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Material United States Federal Income Tax Considerations
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Where You Can Find More Information
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Incorporation of Certain Documents by Reference
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Legal Matters
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Experts
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Page
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ABOUT THIS PROSPECTUS
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OUR COMPANY
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RISK FACTORS
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FORWARD-LOOKING STATEMENTS
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USE OF PROCEEDS
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PLAN OF DISTRIBUTION
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DESCRIPTION OF COMMON STOCK
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DESCRIPTION OF PREFERRED STOCK
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DESCRIPTION OF WARRANTS
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DESCRIPTION OF DEBT SECURITIES
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WHERE YOU CAN FIND MORE INFORMATION
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INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
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LEGAL MATTERS
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EXPERTS
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offering
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Public offering price per share of common stock
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Net tangible book value per share as of September 30, 2025
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Increase in net tangible book value per share attributable to new investors
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As adjusted net tangible book value per share after this offering
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Dilution per share of common stock to new investors participating in the offering
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Underwriter
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Number of Shares
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Jefferies LLC
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Guggenheim Securities, LLC
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Cantor Fitzgerald & Co.
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Total
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Per Share
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Total
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Without
Option to Purchase Additional Shares |
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With
Option to Purchase Additional Shares |
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Without
Option to Purchase Additional Shares |
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With
Option to Purchase Additional Shares |
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Public offering price
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Underwriting discounts and commissions paid by us
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Proceeds to us, before expenses
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Verastem, Inc.
117 Kendrick Street, Suite 500
Needham, Massachusetts 02494
(781) 292-4200
email address: investors@verastem.com
Preferred Stock
Warrants
Debt Securities
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Page
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ABOUT THIS PROSPECTUS
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| | | | 1 | | |
|
OUR COMPANY
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| | | | 2 | | |
|
RISK FACTORS
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| | | | 3 | | |
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FORWARD-LOOKING STATEMENTS
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| | | | 4 | | |
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USE OF PROCEEDS
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| | | | 6 | | |
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PLAN OF DISTRIBUTION
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| | | | 7 | | |
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DESCRIPTION OF COMMON STOCK
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| | | | 9 | | |
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DESCRIPTION OF PREFERRED STOCK
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| | | | 10 | | |
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DESCRIPTION OF WARRANTS
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| | | | 11 | | |
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DESCRIPTION OF DEBT SECURITIES
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| | | | 12 | | |
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WHERE YOU CAN FIND MORE INFORMATION
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| | | | 19 | | |
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INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
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| | | | 19 | | |
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LEGAL MATTERS
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EXPERTS
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| | | | 20 | | |
Verastem, Inc.
117 Kendrick Street, Suite 500
Needham, Massachusetts 02494
(781) 292-4279
email address: info@verastem.com
| | Jefferies | | |
Guggenheim Securities
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| | Cantor | |