Definium Therapeutics, Inc. (DFTX) Insider Trading -- Recent Executive & Director Transactions
11 insiders reported 43 Form 4 transactions for Definium Therapeutics, Inc. (DFTX) over the past 18 months (most recent 2026-09-29). Recent activity: Roberts Brandi (Chief Financial Officer) Sell 3,377 shares, Sullivan Mark (Chief Legal Officer) Sell 14,051 shares, Wiley Matthew T. (Chief Commercial Officer) Sell 3,097 shares, Barrow Robert (Chief Executive Officer) Sell 31,550 shares, Karlin Daniel (Chief Medical Officer) Sell 10,853 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-29 | Roberts Brandi | Chief Financial Officer | Sell | 3,377 | $123,497 |
| 2026-09-29 | Sullivan Mark | Chief Legal Officer | Sell | 14,051 | $513,845 |
| 2026-09-29 | Wiley Matthew T. | Chief Commercial Officer | Sell | 3,097 | $113,257 |
| 2026-09-29 | Barrow Robert | Chief Executive Officer | Sell | 31,550 | $1.2M |
| 2026-09-29 | Karlin Daniel | Chief Medical Officer | Sell | 10,853 | $396,894 |
| 2026-09-18 | Vallone Carol A | Director | Buy | 1,086 | $38,575 |
| 2026-09-18 | Krebs Andreas | Director | Buy | 1,629 | $57,862 |
| 2026-09-14 | Sullivan Mark | Chief Legal Officer | Buy | 125,000 | $0 |
| 2026-09-14 | Roberts Brandi | Chief Financial Officer | Buy | 125,000 | $0 |
| 2026-09-14 | Wiley Matthew T. | Chief Commercial Officer | Buy | 125,000 | $0 |
| 2026-09-14 | Barrow Robert | Chief Executive Officer | Buy | 750,000 | $0 |
| 2026-09-14 | Karlin Daniel | Chief Medical Officer | Buy | 200,000 | $0 |
| 2026-09-04 | Barrow Robert | Chief Executive Officer | Sell | 19,023 | $721,733 |
| 2026-09-04 | Barrow Robert | Chief Executive Officer | Buy | 40,000 | $0 |
| 2026-08-12 | Sullivan Mark | Chief Legal Officer | Buy | 62,500 | $0 |
| 2026-08-12 | Roberts Brandi | Chief Financial Officer | Buy | 62,500 | $0 |
| 2026-08-12 | Wiley Matthew T. | Chief Commercial Officer | Buy | 62,500 | $0 |
| 2026-08-12 | Barrow Robert | Chief Executive Officer | Buy | 375,000 | $0 |
| 2026-08-12 | Karlin Daniel | Chief Medical Officer | Buy | 100,000 | $0 |
| 2026-06-26 | Barrow Robert | Chief Executive Officer | Sell | 29,208 | $1.3M |
| 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 | Karlin Daniel | Chief Medical Officer | Sell | 10,035 | $451,876 |
| 2026-06-26 | Wiley Matthew T. | Chief Commercial Officer | Sell | 2,867 | $129,101 |
| 2026-06-22 | Sullivan Mark | Chief Legal Officer | Buy | 62,500 | $0 |
Source: SEC Form 4 filings · as of 2026-09-29