VSTM · Verastem, Inc. · Holdings
Substantial doubt about the company's ability to continue as a going concern.
“However, given the risks associated with these potential strategic or financing opportunities, they are not deemed probable for purposes of the going concern assessment and do not alleviate the substantial doubt about our ability to continue as a going concern. There can be no assurance that we will be able to generate sufficient net product revenues or obtain additional capital on favorable terms or at all.”View the 10-Q filed Aug 6, 2026
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 159 13F filersWho Holds VSTM
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 157 filers, like-for-like change +16.9%; actively managed books +13.4%; index-like books +27.6%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 48.7% | 76 | +16.6% |
| Exempt adviser | 2.5% | 4 | +4.0% |
| Adviser | 8.1% | 6 | +7.5% |
| Bank | 9.9% | 15 | +48.1% |
| Insurer | 0.0% | 1 | new |
| Benefit plan | 0.0% | 1 | -74.3% |
| Non-US | 0.3% | 5 | -15.5% |
| Holding company | 14.5% | 8 | +24.3% |
| Broker-dealer | 0.0% | 0 | -100.0% |
| Unknown | 15.9% | 41 | +5.6% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 27.1% | 23 | +27.6% |
| Systematic-like | 9.3% | 13 | -15.9% |
| Concentrated | 17.8% | 24 | +44.3% |
| Diversified active | 45.8% | 97 | +12.0% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 35.5% | 80 | +34.3% |
| Medium turnover | 39.6% | 39 | +25.8% |
| High turnover | 14.2% | 28 | -28.7% |
| Unknown | 10.7% | 10 | +37.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 13.7% | 17 | +13.5% |
| Medium horizon | 31.2% | 30 | +14.8% |
| Long horizon | 34.3% | 94 | +14.6% |
| Unknown | 20.8% | 16 | +27.0% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 16.9% | 25 | +10.0% |
| $1B to $10B | 23.9% | 40 | +4.1% |
| $10B to $100B | 19.6% | 40 | +33.6% |
| $100B or more | 39.6% | 52 | +21.6% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 0.3% | 26 | +42.5% |
| Pooled investment vehicles | 31.5% | 22 | +4.5% |
| Registered funds and BDCs | 10.7% | 11 | +63.4% |
| Pension and profit sharing plans | 0.0% | 1 | 0.0% |
| Insurance companies | 0.1% | 3 | +61.7% |
| Governments and sovereign funds | 0.8% | 3 | +29.1% |
| Other investment advisers | 0.0% | 2 | +1155.1% |
| Diversified | 1.7% | 7 | +231.9% |
| Unknown | 54.8% | 82 | +15.7% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 39.3% | 31 | +11.0% |
| Private equity funds | 0.1% | 4 | +128.6% |
| Venture capital funds | 0.0% | 1 | -100.0% |
| Real estate funds | 0.0% | 2 | +326.7% |
| Securitized asset funds | 0.0% | 1 | 0.0% |
| Other private funds | 0.5% | 6 | +4.1% |
| Mixed private funds | 0.1% | 1 | +74.1% |
| No private funds | 11.2% | 34 | +59.4% |
| Private funds, type not stated | 0.0% | 0 | — |
| Unknown | 48.9% | 77 | +17.6% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 91.0% | 135 | +15.5% |
| Outside the US | 9.0% | 22 | +33.4% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 1 holder with no observed 2026-03-31 13F and 2 holders with no observed 2026-06-30 13F.
Conviction and Crowding
157 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 64.1% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies VSTM's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | IRON Disc Medicine, Inc. | 8 |
| 2 | SPRB Spruce Biosciences, Inc. | 5 |
| 3 | HELP Helus Pharma Inc. | 6 |
| 4 | CBIO Crescent Biopharma, Inc. | 5 |
| 5 | TRAX First Tracks Biotherapeutics, Inc. | 5 |
| 6 | QNRX Quoin Pharmaceuticals Ltd. | 3 |
| 7 | PTHS Pelthos Therapeutics Inc. | 3 |
| 8 | AGIO Agios Pharmaceuticals, Inc. | 5 |
| 9 | CABA Cabaletta Bio, Inc. | 4 |
| 10 | LBRX Lb Pharmaceuticals Inc | 5 |
Shareholder Targets
13F filers that own its peers but not VSTM, quarter ended Jun 30, 2026Found through its holder-overlap peers: IRON, SPRB, HELP, CBIO, TRAX, QNRX, PTHS, AGIO, CABA, LBRX, SLDB, ALMS, KLRS, TLPH, JBIO, CLDX, QTTB, EVMN, RARE, ACOG. 510 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. Registered adviser, Concentrated | $528,861,008 6 held | IRON, SLDB, JBIO |
| 2 | AyurMaya Capital Management Company, LP Adviser, Unknown | $426,031,354 1 held | ALMS |
| 3 | Jupiter Topco LLC Unknown, Diversified active | $284,306,126 10 held | JBIO, ALMS, SLDB |
| 4 | SAMSARA BIOCAPITAL, LLC Registered adviser, Concentrated | $247,340,030 3 held | ALMS, KLRS, JBIO |
| 5 | Logos Global Management LP Registered adviser, Diversified active | $235,471,675 7 held | CLDX, IRON, CBIO |
| 6 | Bellevue Group AG Non-US, Diversified active | $219,763,928 4 held | JBIO, RARE, CLDX |
| 7 | FARALLON CAPITAL MANAGEMENT LLC Registered adviser, Diversified active | $219,594,714 1 held | AGIO |
| 8 | D. E. Shaw & Co., Inc. Unknown, Systematic-like | $208,499,184 11 held | AGIO, RARE, ALMS |
| 9 | TCG Crossover Management, LLC Unknown, Diversified active | $203,369,748 3 held | IRON, TRAX, LBRX |
| 10 | Kynam Capital Management, LP Registered adviser, Concentrated | $198,065,406 1 held | CLDX |
Fund Ownership of VSTM by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 15.49% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 2.90% | 2,625,787 |
| Index ETFs | 12.59% | 11,399,139 |
| Active ETFs | 0.64% | 578,939 |
| Active funds | 3.59% | 3,251,917 |
| Unclassified | 0.00% | 107 |
| All registered funds | 19.72% | 17,855,889 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $35,115,144 | 9.50% | 9,192,447 | Shares | 2026-08-07 | |
| Mid ARMISTICE CAPITAL, LLC Registered adviser | $26,831,680 | 7.26% | 7,024,000 | Shares | 2026-08-14 | |
| Large RTW INVESTMENTS, LP Registered adviser | $25,348,729 | 6.86% | 6,635,793 | Shares | 2026-08-14 | |
| Mid Deep Track Capital, LP Adviser | $21,930,047 | 5.93% | 5,740,850 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $19,611,341 | 5.31% | 5,133,859 | Shares | 2026-09-22 | |
| Small Rosalind Advisors, Inc. | $15,228,464 | 4.12% | 3,986,509 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $14,712,760 | 3.98% | 3,851,508 | Shares | 2026-08-13 | |
| Mid Nantahala Capital Management, LLC Registered adviser | $13,694,012 | 3.70% | 3,584,820 | Shares | 2026-08-19 | |
| Small Stonepine Capital Management, LLC Registered adviser | $12,795,575 | 3.46% | 3,349,627 | Shares | 2026-08-17 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $12,479,443 | 3.38% | 3,266,870 | Shares | 2026-08-13 | |
| Small Foresite Capital Management VI LLC | $12,020,130 | 3.25% | 3,146,631 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $10,394,899 | 2.81% | 2,721,178 | Shares | 2026-08-14 | |
| Large BAKER BROS. ADVISORS LP Registered adviser | $9,547,471 | 2.58% | 2,499,338 | Shares | 2026-08-14 | |
| Large Alyeska Investment Group, L.P. Registered adviser | $8,746,367 | 2.37% | 2,289,625 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $7,937,971 | 2.15% | 2,078,003 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $7,923,233 | 2.14% | 2,074,145 | Shares | 2026-08-12 | |
| Mid AIGH Capital Management LLC | $7,361,139 | 1.99% | 1,927,000 | Shares | 2026-08-07 | |
| Mid Opaleye Management Inc. Registered adviser | $6,876,000 | 1.86% | 1,800,000 | Shares | 2026-08-14 | |
| Large Balyasny Asset Management L.P. Registered adviser | $6,442,716 | 1.74% | 1,686,575 | Shares | 2026-08-14 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $6,220,824 | 1.68% | 1,628,488 | Shares | 2026-08-14 | |
| Mid Hennion & Walsh Asset Management, Inc. Adviser | $5,633,615 | 1.52% | 699,828 | Shares | 2026-10-13 | |
| Small ACORN CAPITAL ADVISORS, LLC | $5,612,164 | 1.52% | 1,469,153 | Shares | 2026-08-14 | |
| Small NEXTBio Capital Management LP | $4,991,976 | 1.35% | 1,306,800 | Shares | 2026-08-14 | |
| Mega FRANKLIN RESOURCES INC Adviser | $4,221,180 | 1.14% | 1,105,021 | Shares | 2026-08-13 | |
| Large Pinnacle Financial Partners, Inc. Bank | $4,150,200 | 1.12% | 1,086,440 | Shares | 2026-08-14 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $3,570,037 | 0.97% | 934,565 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $3,399,704 | 0.92% | 889,975 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $2,734,438 | 0.74% | 715,822 | Shares | 2026-08-13 | |
| Large PANAGORA ASSET MANAGEMENT INC Registered adviser | $2,547,458 | 0.69% | 666,874 | Shares | 2026-08-06 | |
| Mega NORTHERN TRUST CORP Bank | $2,488,710 | 0.67% | 651,495 | Shares | 2026-08-13 | |
| Mid J. Goldman & Co LP Registered adviser | $2,483,282 | 0.67% | 650,074 | Shares | 2026-08-14 | |
| Small SPHERA FUNDS MANAGEMENT LTD. Exempt adviser | $2,416,654 | 0.65% | 632,632 | Shares | 2026-08-14 | |
| Mega FMR LLC Holding company | $2,392,457 | 0.65% | 626,298 | Shares | 2026-08-13 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $2,356,412 | 0.64% | 616,862 | Shares | 2026-08-13 | |
| Mega UBS Group AG Bank | $2,309,112 | 0.62% | 604,480 | Shares | 2026-08-13 | |
| Mid XTX Topco Ltd | $2,146,041 | 0.58% | 561,791 | Shares | 2026-08-14 | |
| Large Jefferies Financial Group Inc. Holding company | $1,896,740 | 0.51% | 496,529 | Shares | 2026-08-17 | |
| Small Torray Investment Partners LLC Registered adviser | $1,823,878 | 0.49% | 477,455 | Shares | 2026-07-30 | |
| Large TORONTO DOMINION BANK Bank | $1,758,777 | 0.48% | 460,413 | Shares | 2026-08-14 | |
| Small Exome Asset Management LLC Registered adviser | $1,638,936 | 0.44% | 429,041 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1,585,300 | 0.43% | 415,000 | Put | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $1,212,189 | 0.33% | 317,327 | Shares | 2026-09-02 | |
| Small Palo Alto Investors LP Registered adviser | $1,182,996 | 0.32% | 309,685 | Shares | 2026-08-19 | |
| Large Jump Financial, LLC | $1,174,650 | 0.32% | 307,500 | Shares | 2026-08-13 | |
| Small Virtus Investment Advisers, LLC Registered adviser | $1,083,466 | 0.29% | 283,630 | Shares | 2026-08-11 | |
| Small Diametric Capital, LP | $1,014,358 | 0.27% | 265,539 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $989,124 | 0.27% | 258,933 | Shares | 2026-08-11 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $931,889 | 0.25% | 243,950 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $910,798 | 0.25% | 238,429 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $898,490 | 0.24% | 235,207 | Shares | 2026-08-11 | |
| Small Ikarian Capital, LLC Registered adviser | $816,964 | 0.22% | 213,865 | Shares | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $759,556 | 0.21% | 198,837 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $706,484 | 0.19% | 184,944 | Shares | 2026-08-06 | |
| Mega SG Americas Securities, LLC Non-US | $658,056 | 0.18% | 172,266 | Shares | 2026-08-07 | |
| Small Knott David M Jr | $592,100 | 0.16% | 155,000 | Shares | 2026-08-12 | |
| Large Janney Montgomery Scott LLC Adviser | $582,316 | 0.16% | 152,439 | Shares | 2026-08-05 | |
| Mid CANTOR FITZGERALD, L. P. | $534,800 | 0.14% | 140,000 | Shares | 2026-08-19 | |
| Mega Invesco Ltd. Adviser | $477,792 | 0.13% | 125,077 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $459,297 | 0.12% | 120,235 | Shares | 2026-08-03 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $447,283 | 0.12% | 117,090 | Shares | 2026-08-14 | |
| Mega ROYAL BANK OF CANADA Bank | $415,856 | 0.11% | 108,863 | Shares | 2026-08-14 | |
| Large ExodusPoint Capital Management, LP Registered adviser | $379,081 | 0.10% | 99,236 | Shares | 2026-08-14 | |
| Large Rafferty Asset Management, LLC Registered adviser | $359,859 | 0.10% | 94,204 | Shares | 2026-08-14 | |
| Mega BARCLAYS PLC Bank | $356,818 | 0.10% | 93,408 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Non-US | $334,891 | 0.09% | 87,668 | Shares | 2026-08-07 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $326,228 | 0.09% | 85,400 | Call | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $319,649 | 0.09% | 83,678 | Shares | 2026-08-12 | |
| Mid Virtu Financial LLC | $314,244 | 0.09% | 82,263 | Shares | 2026-08-13 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $308,223 | 0.08% | 80,687 | Shares | 2026-08-14 | |
| Mid ADAR1 Capital Management, LLC Registered adviser | $289,556 | 0.08% | 75,800 | Shares | 2026-08-14 | |
| Large Brevan Howard Capital Management LP Exempt adviser | $276,503 | 0.07% | 72,383 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $265,872 | 0.07% | 69,600 | Put | 2026-09-02 | |
| Mid BOOTHBAY FUND MANAGEMENT, LLC Registered adviser | $261,826 | 0.07% | 68,541 | Shares | 2026-08-14 | |
| Large Man Group plc | $258,220 | 0.07% | 67,597 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $250,458 | 0.07% | 65,565 | Shares | 2026-08-14 | |
| Mega HSBC HOLDINGS PLC | $227,160 | 0.06% | 59,466 | Shares | 2026-08-14 | |
| Large MetLife Investment Management, LLC Registered adviser | $226,331 | 0.06% | 59,249 | Shares | 2026-08-14 | |
| Large Jain Global LLC Registered adviser | $211,009 | 0.06% | 55,238 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $197,494 | 0.05% | 51,700 | Shares | 2026-08-14 | |
| Mid ALGERT GLOBAL LLC Registered adviser | $195,966 | 0.05% | 51,300 | Shares | 2026-08-13 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $190,824 | 0.05% | 49,954 | Shares | 2026-08-14 | |
| Mega Creative Planning Registered adviser | $181,785 | 0.05% | 47,588 | Shares | 2026-08-13 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $181,709 | 0.05% | 47,568 | Shares | 2026-08-14 | |
| Mid PROFUND ADVISORS LLC Registered adviser | $181,388 | 0.05% | 47,484 | Shares | 2026-08-11 | |
| Large Quadrature Capital Ltd | $179,471 | 0.05% | 46,982 | Shares | 2026-08-07 | |
| Large LOS ANGELES CAPITAL MANAGEMENT LLC Registered adviser | $179,058 | 0.05% | 46,874 | Shares | 2026-08-13 | |
| Large Quantinno Capital Management LP Registered adviser | $177,007 | 0.05% | 46,337 | Shares | 2026-08-13 | |
| Mega ENVESTNET ASSET MANAGEMENT INC Registered adviser | $170,299 | 0.05% | 44,581 | Shares | 2026-09-23 | |
| Mega Cetera Investment Advisers Registered adviser | $165,833 | 0.04% | 43,412 | Shares | 2026-08-12 | |
| Large MERCER GLOBAL ADVISORS INC /ADV Registered adviser | $163,507 | 0.04% | 42,803 | Shares | 2026-08-19 | |
| Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $158,947 | 0.04% | 19,745 | Shares | 2026-10-13 | |
| Mid Graham Capital Management, L.P. Registered adviser | $153,300 | 0.04% | 40,131 | Shares | 2026-08-14 | |
| Mega STIFEL FINANCIAL CORP | $146,507 | 0.04% | 38,353 | Shares | 2026-08-12 | |
| Large Caption Management, LLC Registered adviser | $146,306 | 0.04% | 38,300 | Call | 2026-08-14 | |
| Mid Quantbot Technologies LP Registered adviser | $139,960 | 0.04% | 36,639 | Shares | 2026-08-12 | |
| Mega JPMORGAN CHASE & CO Bank | $135,177 | 0.04% | 35,387 | Shares | 2026-08-12 | |
| Mid Diversified Trust Co | $123,175 | 0.03% | 32,245 | Shares | 2026-07-17 | |
| Small Aries Wealth Management Registered adviser | $117,782 | 0.03% | 30,833 | Shares | 2026-07-24 | |
| Mega Vanguard Global Advisers, LLC Registered adviser | $116,586 | 0.03% | 30,520 | Shares | 2026-08-13 | |
| Mid MIZUHO SECURITIES USA LLC | $114,600 | 0.03% | 30,000 | Shares | 2026-07-24 |
Showing the top 100 of 166 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.