Sullivan Mark (CIK 1331843) reported 9 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-06-26). Recent activity: Sell DFTX (13,008 shares), Buy DFTX (62,500 shares), Sell DFTX (10,702 shares), Buy DFTX (125,000 shares), Sell MNMD (11,276 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-26 | Definium Therapeutics, Inc. (DFTX) | Chief Legal Officer | Sell | 13,008 | $585,750 |
| 2026-06-22 | Definium Therapeutics, Inc. (DFTX) | Chief Legal Officer | Buy | 62,500 | $0 |
| 2026-03-26 | Definium Therapeutics, Inc. (DFTX) | Chief Legal Officer | Sell | 10,702 | $197,666 |
| 2026-02-05 | Definium Therapeutics, Inc. (DFTX) | Chief Legal Officer | Buy | 125,000 | $0 |
| 2025-12-29 | Mind Medicine (MindMed) Inc. (MNMD) | Chief Legal Officer | Sell | 11,276 | $148,279 |
| 2025-09-26 | Mind Medicine (MindMed) Inc. (MNMD) | Chief Legal Officer | Sell | 11,278 | $110,186 |
| 2025-06-26 | Mind Medicine (MindMed) Inc. (MNMD) | Chief Legal Officer | Sell | 11,491 | $78,139 |
| 2025-03-26 | Mind Medicine (MindMed) Inc. (MNMD) | Chief Legal Officer | Sell | 6,576 | $44,322 |
| 2025-03-13 | Mind Medicine (MindMed) Inc. (MNMD) | Chief Legal Officer | Buy | 150,000 | $0 |
Source: SEC Form 4 filings · as of 2026-06-26