Mark Sullivan

CIK 1331843 · Chief Legal Officer · last filed 2026-03-26

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$6.71M

Companies

4

Total Filings

23

Lifetime Open-Market Net

-$963.3K

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
DFTX Chief Legal Officer 271,079 $24.75 $6.71M -$197.7K 2 2026-03-26
Definium Therapeutics, Inc. (MNMD) Delisted Chief Legal Officer 282,576 $15.00 $4.24M -$569.9K 10 2025-12-29
Carisma Therapeutics Inc. (SESN) Delisted General Counsel & Secretary 383,716 $12.58 $4.83M -$152.1K 6 2023-03-06
MModal Inc. (MEDH) Delisted Gen Counsel, CCO & Secretary 39,268 -$43.7K 5 2012-01-04

Recent Filings · Page 2 of 3

23 filings
Form 4 transactions across all companies, newest first.
Filed Symbol Action Net Shares Net $ Link
2024-02-29 Definium Therapeutics, Inc. (MNMD) Delisted Grant (A) $0 EDGAR
2023-04-14 Definium Therapeutics, Inc. (MNMD) Delisted Grant (A) +200,000 $0 EDGAR
2023-03-06 Carisma Therapeutics Inc. (SESN) Delisted Mixed +78,957 $46.3K EDGAR
2023-02-23 Carisma Therapeutics Inc. (SESN) Delisted Sell (S) −39,831 -$23.4K EDGAR
2022-02-23 Carisma Therapeutics Inc. (SESN) Delisted Grant (A) +339,525 $0 EDGAR
2021-02-23 Carisma Therapeutics Inc. (SESN) Delisted Grant (A) $0 EDGAR
2020-02-18 Carisma Therapeutics Inc. (SESN) Delisted Grant (A) $0 EDGAR
2019-08-05 Carisma Therapeutics Inc. (SESN) Delisted Grant (A) $0 EDGAR
2012-01-04 MModal Inc. (MEDH) Delisted Sell (S) −4,719 -$43.7K EDGAR
2012-01-04 MModal Inc. (MEDH) Delisted Tax (F) −1,226 -$11.8K EDGAR
Showing 1120 of 23
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Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.