Updated Jul 16, 2026 · Last SEC filing 2026-06-24
Verastem, Inc. (VSTM) has filed 11 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-24. 4 Form 8-K material event filings were reported by VSTM in the last 90 days. 3 Form 144 notices of proposed sale were filed for VSTM stock. InsiderAlpha tracks every VSTM SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Pharmaceutical Preparations (SIC 2834) |
|---|---|
| SEC CIK | 0001526119 |
| Form 4 filings (90d) | 11 |
|---|---|
| Form 8-K filings (90d) | 4 |
| Form 144 notices (90d) | 3 |
| Latest Form 4 filing | 2026-06-24 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Calkins Daniel | Chief Financial Officer | S — Open-market sale | 57 | $4.13 | $235 | SEC | |
| Calkins Daniel | Chief Financial Officer | S — Open-market sale | 4.0K | $4.18 | $17K | SEC | |
| Paterson Dan | President and CEO | S — Open-market sale | 20.9K | $4.18 | $87K | SEC | |
| Bunn Paul A. | Director | A — Grant or award | 36.0K | $0.00 | — | SEC | |
| Rowinsky Eric K | Director | A — Grant or award | 36.0K | $0.00 | — | SEC | |
| BAILEY MICHAEL P | Director | A — Grant or award | 108.0K | $0.00 | — | SEC | |
| Kapur Anil | Director | A — Grant or award | 36.0K | $0.00 | — | SEC | |
| ROBERTSON MICHELLE | Director | A — Grant or award | 36.0K | $0.00 | — | SEC | |
| JOHNSON JOHN | Director | A — Grant or award | 36.0K | $0.00 | — | SEC | |
| Stuglik Brian M | Director | A — Grant or award | 36.0K | $0.00 | — | SEC | |
| Tollefson Karin Anna | Director | A — Grant or award | 36.0K | $0.00 | — | SEC | |
| Paterson Dan | President and CEO | S — Open-market sale | 806 | $5.82 | $5K | SEC | |
| Calkins Daniel | Chief Financial Officer | A — Grant or award | 57 | $5.74 | $327 | SEC | |
| Paterson Dan | President and CEO | S — Open-market sale | 970 | $6.69 | $6K | SEC | |
| Calkins Daniel | Chief Financial Officer | A — Grant or award | 16.7K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Verastem, Inc. (VSTM). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Calkins Daniel | 2 | $17K |
| Paterson Dan | 2 | $92K |
| Stuglik Brian M | 1 | — |
| Kapur Anil | 1 | — |
| ROBERTSON MICHELLE | 1 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in VSTM insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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