SEC Form 4 · accession 0001470831-26-000504
C4 Therapeutics, Inc. · CCCC
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Kenneth Carl Anderson
Director
Period of report
Jun 1, 2026
Accepted (ET)
Jun 4, 2026 · 4:14 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001662579
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Jun 1, 2026 | M | 1,070 | $2.11 | A | 69,300 | D | |
| Common StockF2 | holding | — | — | — | 129,877 | I | By Kenneth C. Anderson 2021 Irrevocable Trust | |
| Common StockF3 | holding | — | — | — | 74,581 | I | By Kenneth C. Anderson 2015 Irrevocable Trust | |
| Common StockF4 | holding | — | — | — | 74,581 | I | By Cynthia E. Anderson 2015 Irrevocable Trust | |
| Common StockF5 | holding | — | — | — | 3,623 | I | By Kenneth C. Anderson Revocable Trust | |
| Common StockF6 | holding | — | — | — | 3,623 | I | By Cynthia E. Anderson Revocable Trust |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy)F7 | $2.11 | Jun 1, 2026 | M | 1,070 | D | — | Jul 12, 2026 | Common Stock | 1,070 | 0 | D |
Explanation of responses
- F1The reported transaction represents the exercise of a stock option for cash. No shares were sold in connection with the exercise.
- F2Shares held by the Kenneth C. Anderson 2021 Irrevocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
- F3Shares held by the Kenneth C. Anderson 2015 Irrevocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
- F4Shares held by the Cynthia E. Anderson 2015 Irrevocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
- F5Shares held by the Kenneth C. Anderson Revocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
- F6Shares held by the Cynthia E. Anderson Revocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
- F7The shares underlying this option are fully vested and exercisable.