Updated Jul 16, 2026 · Last SEC filing 2026-07-13
C4 Therapeutics, Inc. (CCCC) has filed 12 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-13. 4 Form 8-K material event filings were reported by CCCC in the last 90 days. 1 Form 144 notices of proposed sale were filed for CCCC stock. InsiderAlpha tracks every CCCC SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Biological Products, (No Diagnostic Substances) (SIC 2836) |
|---|---|
| SEC CIK | 0001662579 |
| Form 4 filings (90d) | 12 |
|---|---|
| Form 8-K filings (90d) | 4 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-07-13 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| REYNO LEONARD | Chief Medical Officer | F — Tax withholding / forfeiture | 7.4K | $4.06 | $30K | SEC | |
| REYNO LEONARD | Chief Medical Officer | M — Option exercise | 15.3K | $0.00 | — | SEC | |
| GROGAN DONNA ROY | Director | A — Grant or award | 3.3K | $4.34 | $14K | SEC | |
| Anderson Kenneth Carl | Director | A — Grant or award | 2.6K | $4.34 | $12K | SEC | |
| Anderson Kenneth Carl | Director | M — Option exercise | 1.1K | $2.11 | $2K | SEC | |
| Anderson Kenneth Carl | Director | A — Grant or award | 4.3K | $2.70 | $11K | SEC | |
| GROGAN DONNA ROY | Director | A — Grant or award | 5.4K | $2.70 | $14K | SEC | |
| Hirsch Andrew | President & CEO | F — Tax withholding / forfeiture | 9.1K | $1.89 | $17K | SEC | |
| Hirsch Andrew | President & CEO | M — Option exercise | 20.4K | $0.00 | — | SEC | |
| Adams Kendra | Chief Financial Officer | M — Option exercise | 30.9K | $0.00 | — | SEC | |
| Schick Kelly | Chief People Officer | M — Option exercise | 20.9K | $0.00 | — | SEC | |
| Boyle Scott N | Chief Business Officer | M — Option exercise | 20.9K | $0.00 | — | SEC | |
| REYNO LEONARD | Chief Medical Officer | M — Option exercise | 30.9K | $0.00 | — | SEC | |
| REYNO LEONARD | Chief Medical Officer | F — Tax withholding / forfeiture | 16.6K | $1.89 | $31K | SEC | |
| Adams Kendra | Chief Financial Officer | F — Tax withholding / forfeiture | 15.4K | $1.89 | $29K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for C4 Therapeutics, Inc. (CCCC). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Anderson Kenneth Carl | 4 | $14K |
| REYNO LEONARD | 2 | $30K |
| GROGAN DONNA ROY | 2 | $14K |
| Cooper Ronald Harold Wilfred | 1 | — |
| Koppikar Utpal | 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 CCCC 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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