Sullivan Mark
SEC insider (Form 3/4/5 filer). CIK 0001331843. Chief Legal Officer at Definium Therapeutics, Inc. (DFTX). 14 reported Form 4/5 transactions since Sep 2024; latest on Sep 25, 2026. Located in NEW YORK, NY.
Companies Sullivan Mark has filed insider reports for
- Definium Therapeutics, Inc. (DFTX): Officer, Chief Legal Officer
Sullivan Mark
CIK: 0001331843
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Definium Therapeutics, Inc.
Discretionary Trading P&L
Holdings
Transaction History (14 total)
- Sep 25, 2026DFTX
Definium Therapeutics, Inc.
SaleDirect14.1K shares at avg. $36.57$514K - Sep 14, 2026DFTX
Definium Therapeutics, Inc.
AwardDirect125K shares- - Aug 12, 2026DFTX
Definium Therapeutics, Inc.
AwardDirect62.5K shares- - Jun 25, 2026DFTX
Definium Therapeutics, Inc.
SaleDirect13K shares at avg. $45.03$586K - Jun 22, 2026DFTX
Definium Therapeutics, Inc.
AwardDirect62.5K shares- - Mar 25, 2026DFTX
Definium Therapeutics, Inc.
SaleDirect10.7K shares at avg. $18.47$198K - Feb 3, 2026DFTX
Definium Therapeutics, Inc.
AwardDirect125K shares- - Dec 26, 2025MNMD
Mind Medicine (MindMed) Inc.
SaleDirect11.3K shares at avg. $13.15$148K - Sep 25, 2025MNMD
Mind Medicine (MindMed) Inc.
SaleDirect11.3K shares at avg. $9.77$110K - Jun 25, 2025MNMD
Mind Medicine (MindMed) Inc.
SaleDirect11.5K shares at avg. $6.80$78K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 25, 2026 | DFTX Definium Therapeutics, Inc. | Sale | 14,051 | $36.57 | $513,845 | Direct |
| Sep 14, 2026 | DFTX Definium Therapeutics, Inc. | Award | 125,000 | - | $0 | Direct |
| Aug 12, 2026 | DFTX Definium Therapeutics, Inc. | Award | 62,500 | - | $0 | Direct |
| Jun 25, 2026 | DFTX Definium Therapeutics, Inc. | Sale | 13,008 | $45.03 | $585,750 | Direct |
| Jun 22, 2026 | DFTX Definium Therapeutics, Inc. | Award | 62,500 | - | $0 | Direct |
| Mar 25, 2026 | DFTX Definium Therapeutics, Inc. | Sale | 10,702 | $18.47 | $197,666 | Direct |
| Feb 3, 2026 | DFTX Definium Therapeutics, Inc. | Award | 125,000 | - | $0 | Direct |
| Dec 26, 2025 |  MNMD Mind Medicine (MindMed) Inc. | Sale | 11,276 | $13.15 | $148,244 | Direct |
| Sep 25, 2025 | MNMD Mind Medicine (MindMed) Inc. | Sale | 11,278 | $9.77 | $110,186 | Direct |
| Jun 25, 2025 | MNMD Mind Medicine (MindMed) Inc. | Sale | 11,491 | $6.80 | $78,139 | Direct |
1-10 of 14 transactions