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Definium Therapeutics, Inc. — Insider Transactions

Form 4 filings by directors, officers, and 10%+ shareholders

SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.

Overview All Filings Annual Quarterly Insiders
Insider Title Type Shares Price Value Owns After Date
Karlin Daniel Chief Medical Officer Sale 5,600 $13.15 $73,640 425,025 Dec 26, 2025
Barrow Robert Chief Executive Officer Sale 25,791 $13.15 $339,152 778,477 Dec 26, 2025
Sullivan Mark Chief Legal Officer Sale 11,276 $13.15 $148,279 282,576 Dec 26, 2025
Sullivan Mark Chief Legal Officer Sale 11,278 $9.77 $110,186 293,852 Sep 25, 2025
Barrow Robert Chief Executive Officer Sale 25,797 $9.77 $252,037 804,268 Sep 25, 2025
Karlin Daniel Chief Medical Officer Sale 7,704 $9.77 $75,268 430,625 Sep 25, 2025
Sullivan Mark Chief Legal Officer Sale 11,491 $6.80 $78,139 305,130 Jun 25, 2025
Karlin Daniel Chief Medical Officer Sale 7,848 $6.80 $53,366 438,329 Jun 25, 2025
Barrow Robert Chief Executive Officer Sale 26,491 $6.80 $180,139 830,065 Jun 25, 2025
Barrow Robert Chief Executive Officer Sale 21,208 $6.74 $142,942 856,556 Mar 25, 2025
Karlin Daniel Chief Medical Officer Sale 6,836 $6.74 $46,075 446,177 Mar 25, 2025
Sullivan Mark Chief Legal Officer Sale 6,576 $6.74 $44,322 316,621 Mar 25, 2025
Liao Carrie Chief Accounting Officer Sale 2,347 $6.74 $15,819 144,923 Mar 25, 2025
Karlin Daniel Chief Medical Officer Award / Grant 115,000 453,013 Mar 12, 2025
Barrow Robert Chief Executive Officer Award / Grant 350,000 877,764 Mar 12, 2025
Sullivan Mark Chief Legal Officer Award / Grant 150,000 323,197 Mar 12, 2025
Liao Carrie Chief Accounting Officer Award / Grant 50,000 142,270 Mar 12, 2025
Barrow Robert Chief Executive Officer Sale 19,106 $7.43 $141,958 526,666 Dec 26, 2024
Liao Carrie Chief Accounting Officer Sale 2,273 $7.43 $16,888 97,270 Dec 26, 2024
Karlin Dan Chief Medical Officer Sale 6,643 $7.43 $49,357 338,013 Dec 26, 2024
Sullivan Mark Chief Legal Officer Sale 4,519 $7.43 $33,576 173,197 Dec 26, 2024
GRYSKA DAVID W Purchase 2,500 $7.17 $17,925 19,851 Dec 5, 2024
Liao Carrie Chief Accounting Officer Sale 2,352 $5.98 $14,065 99,543 Sep 25, 2024
Barrow Robert Chief Executive Officer Sale 19,771 $5.98 $118,231 545,772 Sep 25, 2024
Karlin Dan Chief Medical Officer Sale 6,871 $5.98 $41,089 344,656 Sep 25, 2024
Sullivan Mark Chief Legal Officer Sale 4,430 $5.98 $26,491 177,716 Sep 25, 2024
GRYSKA DAVID W Purchase 3,500 $5.98 $20,930 17,351 Aug 23, 2024
Halperin Wernli Miri Executive President Option Exercise 50,000 $3.70 $185,000 235,000 Aug 21, 2024
Barrow Robert Chief Executive Officer Purchase 500 $6.12 $3,060 565,543 Aug 19, 2024
Sullivan Mark Chief Legal Officer Sale 17,854 $7.22 $128,906 182,146 Jun 25, 2024
Karlin Dan Chief Medical Officer Sale 6,925 $7.22 $49,999 351,527 Jun 25, 2024
Barrow Robert Chief Executive Officer Sale 15,659 $7.22 $113,058 564,543 Jun 25, 2024
Greenway Schond L. Chief Financial Officer Tax Withholding 5,560 $9.78 $54,377 211,057 Mar 25, 2024
Karlin Dan Chief Medical Officer Sale 6,578 $9.50 $62,491 358,452 Mar 25, 2024
Barrow Robert Chief Executive Officer Sale 16,519 $9.50 $156,931 580,202 Mar 25, 2024
Karlin Dan Chief Medical Officer Sale 6,774 $3.63 $24,590 365,030 Dec 26, 2023
Barrow Robert Chief Executive Officer Sale 13,237 $3.63 $48,050 596,721 Dec 26, 2023
Greenway Schond L. Chief Financial Officer Sale 5,652 $3.63 $20,517 216,617 Dec 26, 2023
Barrow Robert Chief Executive Officer Sale 8,231 $3.58 $29,467 611,729 Sep 25, 2023
Karlin Dan Chief Medical Officer Sale 3,240 $3.58 $11,599 371,804 Sep 25, 2023
Greenway Schond L. Chief Financial Officer Sale 1,908 $3.57 $6,812 226,123 Sep 25, 2023
Greenway Schond L. Chief Financial Officer Sale 20,000 $3.80 $76,000 228,031 Aug 25, 2023
Barrow Robert Chief Executive Officer Sale 8,416 $3.21 $27,015 623,457 Jun 27, 2023
Karlin Dan Chief Medical Officer Sale 2,963 $3.21 $9,511 378,722 Jun 27, 2023
Greenway Schond L. Chief Financial Officer Sale 3,941 $3.21 $12,651 248,031 Jun 27, 2023
GRYSKA DAVID W Award / Grant 13,851 13,851 Jun 21, 2023
CRYSTAL ROGER Award / Grant 13,671 19,623 Jun 21, 2023
Krebs Andreas Award / Grant 13,671 15,107 Jun 21, 2023
Vallone Carol A Award / Grant 13,671 16,544 Jun 21, 2023
Bruhn Suzanne Louise Award / Grant 13,671 19,623 Jun 21, 2023