SEC Insider Transactions from Sullivan Mark.

Last updated: 2026-03-26 23:02 UTC | Total transactions: 18

Sullivan Mark, Chief Legal Officer at Definium Therapeutics ($DFTX), made four open market sales of company shares over the last year, totaling nearly $381,000. His most recent sale occurred on December 26, 2025. These transactions rank 7,053rd out of 11,678 individual insiders, well below the average sale amount of $8.6 million across 6 transactions per insider. Sullivan Mark recorded no open market purchases in this period.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
March 25, 2026 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer S Common Shares 10702 $18.47 271,079.0000 98,509,279 3.80% 0.01%
Feb. 3, 2026 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer A Common Shares 125000 $0.00 407,576.0000 98,509,279 44.24% 0.13%
Dec. 26, 2025 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer S Common Shares 11276 $13.15 282,576.0000 98,509,279 3.84% 0.01%
Sept. 25, 2025 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer S Common Shares 11278 $9.77 293,852.0000 75,368,359 3.70% 0.01%
June 25, 2025 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer S Common Shares 11491 $6.80 305,130.0000 75,368,359 3.63% 0.02%
March 25, 2025 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer S Common Shares 6576 $6.74 316,621.0000 75,368,359 2.03% 0.01%
March 12, 2025 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer A Common Shares 150000 $0.00 323,197.0000 75,368,359 86.61% 0.20%
Dec. 26, 2024 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer S Common Shares 4519 $7.43 173,197.0000 0 2.54% 0.00%
Sept. 25, 2024 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer S Common Shares 4430 $5.98 177,716.0000 0 2.43% 0.00%
June 25, 2024 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer S Common Shares 17854 $7.22 182,146.0000 0 8.93% 0.00%
Feb. 27, 2024 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer A Stock Option (Right to Buy) 125000 $0.00 125,000.0000 0 9999.99% 0.00%
April 13, 2023 Definium Therapeutics, Inc. $DFTX Sullivan Mark Chief Legal Officer A Common Shares 200000 $0.00 200,000.0000 0 9999.99% 0.00%
March 2, 2023 Carisma Therapeutics Inc. $CARM Sullivan Mark General Counsel & Secretary M Common Stock 113175 $0.59 423,530.0000 0 36.47% 0.00%
March 2, 2023 Carisma Therapeutics Inc. $CARM Sullivan Mark General Counsel & Secretary S Common Stock 44879 $0.59 378,651.0000 0 10.60% 0.00%
March 2, 2023 Carisma Therapeutics Inc. $CARM Sullivan Mark General Counsel & Secretary S Common Stock 100978 $0.59 198,716.0000 0 33.69% 0.00%
March 2, 2023 Carisma Therapeutics Inc. $CARM Sullivan Mark General Counsel & Secretary M Common Stock 185000 $0.59 383,716.0000 0 93.10% 0.00%
March 2, 2023 Carisma Therapeutics Inc. $CARM Sullivan Mark General Counsel & Secretary S Common Stock 73361 $0.59 310,355.0000 0 19.12% 0.00%
Feb. 21, 2023 Carisma Therapeutics Inc. $CARM Sullivan Mark General Counsel & Secretary S Common Stock 39831 $0.59 299,694.0000 0 11.73% 0.00%