5 insiders reported 18 Form 4 transactions for Definium Therapeutics, Inc. (DFTX) over the past 18 months (most recent 2026-06-26). Recent activity: Sullivan Mark (Chief Legal Officer) Sell 13,008 shares, Roberts Brandi (Chief Financial Officer) Sell 3,013 shares, Wiley Matthew T. (Chief Commercial Officer) Sell 2,867 shares, Barrow Robert (Chief Executive Officer) Sell 29,208 shares, Karlin Daniel (Chief Medical Officer) Sell 10,035 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-26 | Sullivan Mark | Chief Legal Officer | Sell | 13,008 | $585,750 |
| 2026-06-26 | Roberts Brandi | Chief Financial Officer | Sell | 3,013 | $135,675 |
| 2026-06-26 | Wiley Matthew T. | Chief Commercial Officer | Sell | 2,867 | $129,101 |
| 2026-06-26 | Barrow Robert | Chief Executive Officer | Sell | 29,208 | $1.3M |
| 2026-06-26 | Karlin Daniel | Chief Medical Officer | Sell | 10,035 | $451,876 |
| 2026-06-22 | Sullivan Mark | Chief Legal Officer | Buy | 62,500 | $0 |
| 2026-06-22 | Roberts Brandi | Chief Financial Officer | Buy | 62,500 | $0 |
| 2026-06-22 | Wiley Matthew T. | Chief Commercial Officer | Buy | 62,500 | $0 |
| 2026-06-22 | Barrow Robert | Chief Executive Officer | Buy | 375,000 | $0 |
| 2026-06-22 | Karlin Daniel | Chief Medical Officer | Buy | 100,000 | $0 |
| 2026-03-26 | Sullivan Mark | Chief Legal Officer | Sell | 10,702 | $197,666 |
| 2026-03-26 | Barrow Robert | Chief Executive Officer | Sell | 24,431 | $451,241 |
| 2026-03-26 | Karlin Daniel | Chief Medical Officer | Sell | 8,018 | $148,092 |
| 2026-02-05 | Wiley Matthew T. | Chief Commercial Officer | Buy | 115,000 | $0 |
| 2026-02-05 | Roberts Brandi | Chief Financial Officer | Buy | 150,000 | $0 |
| 2026-02-05 | Barrow Robert | Chief Executive Officer | Buy | 320,000 | $0 |
| 2026-02-05 | Karlin Daniel | Chief Medical Officer | Buy | 150,000 | $0 |
| 2026-02-05 | Sullivan Mark | Chief Legal Officer | Buy | 125,000 | $0 |
Source: SEC Form 4 filings · as of 2026-06-26