SEC Form 4 · Updated Daily
THRX
Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| DENNER ALEXANDER J | Director | 7,125,825 | 2025-03-04 | S |
| Sarissa Capital Management LP | 10%+ Owner | 7,125,825 | 2025-03-04 | S |
| Aguiar Michael W | Director · Officer | 980,907 | 2017-12-04 | S |
| Winningham Rick E | Director · Officer | 825,391 | 2014-08-15 | D |
| WHITESIDES GEORGE M | Director | 606,377 | 2014-05-22 | A |
| Shafer Bradford J | Officer | 443,013 | 2014-08-20 | F |
| VAGELOS P ROY | Director | 404,802 | 2009-12-23 | M |
| BLUM LEONARD M | Officer | 401,538 | 2014-08-20 | F |
| dEsparbes Eric | Officer | 376,965 | 2018-05-20 | F |
| Mammen Mathai | Officer | 334,040 | 2014-08-20 | F |
| ABERCROMBIE GEORGE B | Director | 293,479 | 2018-08-20 | F |
| Raifeld Pavel | Director · Officer | 284,799 | 2026-08-20 | F |
| Faerm Michael E. | Officer | 279,422 | 2017-11-20 | F |
| LEE JUNNING | Officer | 262,198 | 2014-08-20 | F |
| Witek Theodore J. Jr. | Officer | 256,271 | 2018-08-20 | F |
| WALTRIP WILLIAM H | Director | 161,789 | 2017-04-20 | A |
| Haimovitz Jules | Director | 152,692 | 2026-05-04 | A |
| DiPaolo Mark | Director | 140,492 | 2026-05-04 | A |
| Schlesinger Sarah J. | Director | 140,492 | 2026-05-04 | A |
| Bickerstaff George | Director | 137,207 | 2022-04-25 | A |
| Odysseas Kostas D | Director | 122,625 | 2024-06-17 | A |
| Gunderson Robert V JR | Director | 115,970 | 2014-05-22 | A |
| LEVINE ARNOLD J | Director | 111,794 | 2014-03-21 | M |
| Basso Stephen | Officer | 88,013 | 2026-08-20 | F |
| YOUNG WILLIAM D | Director | 83,935 | 2014-05-22 | A |
| FRIEDMAN CATHY | Director | 73,805 | 2017-04-20 | A |
| PEPE PAUL | Director | 73,805 | 2017-04-20 | A |
| Tyree James L | Director | 70,554 | 2017-04-20 | A |
| Birx Deborah | Director | 58,984 | 2023-05-22 | A |
| LEPORE PATRICK G | Director | 58,278 | 2017-04-20 | A |
| Zhen Marianne | Officer | 56,389 | 2026-08-20 | F |
| Humphrey Patrick PA | Officer | 54,310 | 2007-12-10 | M |
| DUNCAN BARBARA GAYLE | Director | 52,318 | 2017-04-20 | A |
| Brinkley David L | Officer | 48,749 | 2013-05-29 | S |
| HULME GEOFFREY | Officer | 46,251 | 2020-05-20 | F |
| Kitt Michael | Officer | 45,738 | 2008-06-04 | M |
| Small Derek A | Director | 45,035 | 2026-05-04 | A |
| Srivastava Sapna | Director | 44,096 | 2024-06-17 | A |
| MALKIEL BURTON G | Director | 41,000 | 2014-05-22 | A |
| Ronsheim Matthew | Officer | 40,510 | 2024-05-20 | F |
| Kearney Terrence C | Director | 37,083 | 2015-04-24 | A |
| RINGROSE PETER S | Director | 36,000 | 2014-05-22 | A |
| DRAZAN JEFFREY M | Director | 33,465 | 2012-05-01 | S |
| Fore Henrietta | Director | 33,000 | 2014-05-22 | A |
| PASQUALONE FRANK | Officer | 20,000 | 2014-01-23 | A |
| Linden Josephine | Director | 15,194 | 2026-05-18 | A |
| JONKER JEFFREY DAVID | Officer | 15,000 | 2013-10-22 | A |
| Loewenthal Ronn | Director | 10,645 | 2006-05-02 | M |
| Campbell Arthur L | Officer | 5,376 | 2008-01-29 | A |
| GLAXOSMITHKLINE PLC | 10%+ Owner | 0 | 2021-05-20 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-20 | Raifeld Pavel | Tax withholding | 1,130 | $21.00 | 284,799 |
| 2026-08-20 | Basso Stephen | Tax withholding | 558 | $21.00 | 88,013 |
| 2026-08-20 | Zhen Marianne | Tax withholding | 1,127 | $21.00 | 56,389 |
| 2026-05-20 | Zhen Marianne | Tax withholding | 1,127 | $22.24 | 57,516 |
| 2026-05-20 | Raifeld Pavel | Tax withholding | 1,130 | $22.24 | 285,929 |
| 2026-05-20 | Basso Stephen | Tax withholding | 559 | $22.24 | 88,571 |
| 2026-05-18 | Linden Josephine | — | — | — | 0 |
| 2026-05-18 | Linden Josephine | Grant / award (derivative) | 9,166 | $0.00 | 9,166 |
| 2026-05-18 | Linden Josephine | Grant / award | 9,461 | $0.00 | 15,194 |
| 2026-05-18 | Linden Josephine | Grant / award | 5,733 | $0.00 | 5,733 |
| 2026-05-15 | Raifeld Pavel | Grant / award | 1,123 | $0.00 | 287,059 |
| 2026-05-15 | Basso Stephen | Grant / award | 1,123 | $0.00 | 89,130 |
| 2026-05-04 | Haimovitz Jules | Grant / award (derivative) | 10,000 | $0.00 | 10,000 |
| 2026-05-04 | Haimovitz Jules | Grant / award | 9,786 | $0.00 | 152,692 |
| 2026-05-04 | Small Derek A | Grant / award (derivative) | 10,000 | $0.00 | 10,000 |
| 2026-05-04 | Small Derek A | Grant / award | 9,786 | $0.00 | 45,035 |
| 2026-05-04 | Basso Stephen | Grant / award (derivative) | 93,750 | $0.00 | 93,750 |
| 2026-05-04 | Basso Stephen | Grant / award | 37,994 | $0.00 | 88,007 |
| 2026-05-04 | Schlesinger Sarah J. | Grant / award (derivative) | 10,000 | $0.00 | 10,000 |
| 2026-05-04 | Schlesinger Sarah J. | Grant / award | 9,786 | $0.00 | 140,492 |
| 2026-05-04 | Zhen Marianne | Grant / award (derivative) | 31,500 | $0.00 | 31,500 |
| 2026-05-04 | Zhen Marianne | Grant / award | 12,766 | $0.00 | 58,643 |
| 2026-05-04 | Raifeld Pavel | Grant / award (derivative) | 312,500 | $0.00 | 312,500 |
| 2026-05-04 | Raifeld Pavel | Grant / award | 126,646 | $0.00 | 285,936 |
| 2026-05-04 | DiPaolo Mark | Grant / award (derivative) | 10,000 | $0.00 | 10,000 |
| 2026-05-04 | DiPaolo Mark | Grant / award | 9,786 | $0.00 | 140,492 |
| 2026-02-20 | Zhen Marianne | Tax withholding | 2,460 | $23.39 | 45,877 |
| 2026-02-20 | Raifeld Pavel | Tax withholding | 2,986 | $23.39 | 159,290 |
| 2026-02-20 | Basso Stephen | Tax withholding | 1,244 | $23.39 | 50,013 |
| 2025-11-20 | Zhen Marianne | Tax withholding | 992 | $21.16 | 48,337 |
| 2025-11-20 | Basso Stephen | Tax withholding | 237 | $21.16 | 51,257 |
| 2025-11-15 | Basso Stephen | Grant / award | 604 | $0.00 | 51,494 |
| 2025-11-03 | Raifeld Pavel | Grant / award | 110,436 | $18.11 | 162,276 |
| 2025-11-03 | Basso Stephen | Grant / award | 27,609 | $18.11 | 50,890 |
| 2025-08-20 | Zhen Marianne | Tax withholding | 991 | $19.95 | 49,329 |
| 2025-08-20 | Basso Stephen | Tax withholding | 237 | $19.95 | 23,281 |
| 2025-05-20 | Basso Stephen | Tax withholding | 237 | $18.78 | 23,518 |
| 2025-05-20 | Zhen Marianne | Tax withholding | 992 | $18.78 | 50,320 |
| 2025-05-19 | Haimovitz Jules | Grant / award (derivative) | 10,000 | $0.00 | 10,000 |
| 2025-05-19 | Haimovitz Jules | Grant / award | 12,077 | $0.00 | 142,906 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.