Dianthus Therapeutics, Inc. /DE/ — 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.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Savitz Ryan | CFO & CBO | Option Exercise | 20,000 | $8.44 | $168,800 | 20,000 | Dec 4, 2025 |
| Randhawa Simrat | EVP, Head of R&D | Option Exercise | 3,529 | $17.88 | $63,099 | 91,507 | Nov 14, 2025 |
| Savitz Ryan | CFO & CBO | Option Exercise | 20,000 | $8.44 | $168,800 | 20,000 | Sep 9, 2025 |
| Kiselak Tomas | — | Other | 62,146 | — | — | — | Sep 27, 2024 |
| Kiselak Tomas | — | Other | 58,857 | — | — | — | Apr 1, 2024 |
| MOULDER LEON O JR | — | Award / Grant | 166,667 | $12.00 | $2,000,004 | 1,436,745 | Jan 22, 2024 |
| Fairmount Funds Management LLC | — | Award / Grant | 834,334 | $12.00 | $10,012,008 | 2,762,837 | Jan 22, 2024 |
| Avidity Partners Management (GP) LLC | — | Award / Grant | 1,500,000 | $12.00 | $18,000,000 | 2,717,554 | Jan 22, 2024 |
| Harwin Peter Evan | — | Purchase | 24,670 | $13.63 | $336,252 | 1,928,503 | Sep 29, 2023 |
| Kiselak Tomas | — | Purchase | 30,000 | $13.15 | $394,500 | 1,903,833 | Sep 26, 2023 |
| Randhawa Simrat | Chief Medical Officer | Purchase | 2,000 | $13.20 | $26,400 | 4,000 | Sep 21, 2023 |
| Kiselak Tomas | — | Purchase | 30,000 | $13.20 | $396,000 | 1,873,833 | Sep 19, 2023 |
| Kiselak Tomas | — | Purchase | 14,887 | $10.85 | $161,524 | 1,834,466 | Sep 13, 2023 |
| TRV GP IV, LLC | — | Sale | 1,500,000 | $0.82 | $1,230,000 | 3,058,204 | Feb 7, 2023 |
| Beetham Thomas W. | See Remarks | Award / Grant | 3,000 | $0.94 | $2,820 | 19,897 | Nov 30, 2022 |
| Mahoney Stephen F. | See Remarks | Award / Grant | 3,000 | $0.94 | $2,820 | 17,264 | Nov 30, 2022 |
| Deardorf Caren | Chief Commercial Officer | Award / Grant | 3,000 | $0.94 | $2,820 | 19,762 | Nov 30, 2022 |
| GARDNER JASON | See Remarks | Award / Grant | 3,000 | $0.94 | $2,820 | 292,872 | Nov 30, 2022 |
| Stants Kristen | Chief People Officer | Award / Grant | 3,000 | $0.94 | $2,820 | 20,264 | Nov 30, 2022 |
| Stants Kristen | Chief People Officer | Award / Grant | 3,000 | $0.99 | $2,970 | 17,264 | May 31, 2022 |
| Deardorf Caren | Chief Commercial Officer | Award / Grant | 3,000 | $0.99 | $2,970 | 16,762 | May 31, 2022 |
| GARDNER JASON | See Remarks | Award / Grant | 3,000 | $0.99 | $2,970 | 289,872 | May 31, 2022 |
| Beetham Thomas W. | See Remarks | Award / Grant | 3,000 | $0.99 | $2,970 | 16,897 | May 31, 2022 |
| Stants Kristen | Chief People Officer | Sale | 5,736 | $6.73 | $38,603 | 14,264 | Sep 16, 2021 |
| Mahoney Stephen F. | See Remarks | Sale | 5,736 | $6.73 | $38,603 | 14,264 | Sep 16, 2021 |
| Deardorf Caren | Chief Commercial Officer | Sale | 6,238 | $6.73 | $41,982 | 13,762 | Sep 16, 2021 |
| GARDNER JASON | See Remarks | Sale | 14,340 | $6.73 | $96,508 | 286,872 | Sep 16, 2021 |
| Beetham Thomas W. | See Remarks | Sale | 6,103 | $6.73 | $41,073 | 13,897 | Sep 16, 2021 |
| Nichols David Wayne | Chief Technical Officer | Sale | 5,694 | $6.73 | $38,321 | 14,306 | Sep 16, 2021 |
| Olson Lisa | See Remarks | Sale | 5,736 | $6.73 | $38,603 | 14,264 | Sep 16, 2021 |
| Olson Lisa | See Remarks | Award / Grant | 20,000 | — | — | 20,000 | Sep 14, 2021 |
| Stants Kristen | Chief People Officer | Award / Grant | 20,000 | — | — | 20,000 | Sep 14, 2021 |
| Deardorf Caren | Chief Commercial Officer | Award / Grant | 20,000 | — | — | 20,000 | Sep 14, 2021 |
| Mahoney Stephen F. | See Remarks | Award / Grant | 20,000 | — | — | 20,000 | Sep 14, 2021 |
| GARDNER JASON | See Remarks | Award / Grant | 50,000 | — | — | 301,212 | Sep 14, 2021 |
| Nichols David Wayne | Chief Technical Officer | Award / Grant | 20,000 | — | — | 20,000 | Sep 14, 2021 |
| Beetham Thomas W. | See Remarks | Award / Grant | 20,000 | — | — | 20,000 | Sep 14, 2021 |
| Borisy Alexis | — | Other | 4,100 | — | — | 4,100 | Aug 26, 2021 |
| Third Rock Ventures GP IV, L.P. | — | Other | 1,250,000 | — | — | 6,758,204 | Aug 25, 2021 |
| Atlas Venture Fund X, L.P. | — | Other | 968,726 | — | — | 3,148,399 | Feb 11, 2021 |
| Booth Bruce | — | Purchase | 1,250,000 | $8.00 | $10,000,000 | 1,250,000 | Jun 29, 2020 |
| GARDNER JASON | See Remarks | Sale | 11,200 | $15.25 | $170,800 | 251,212 | Jan 10, 2020 |
| DAVIS JOHN C. JR | Chief Medical Officer | Sale | 11,294 | $15.04 | $169,862 | 8,304 | Jan 2, 2020 |
| GARDNER JASON | See Remarks | Sale | 2,800 | $15.10 | $42,280 | 262,412 | Jan 2, 2020 |
| ZDRAVESKI ZORAN | See Remarks | Option Exercise | 820 | $7.71 | $6,322 | 140,912 | Dec 24, 2019 |
| ISACSON CHRISTINA K. | Chief Business Officer | Sale | 4,463 | $16.01 | $71,453 | 83,786 | Dec 24, 2019 |
| ZDRAVESKI ZORAN | See Remarks | Sale | 7,902 | $16.00 | $126,432 | 128,009 | Dec 24, 2019 |
| ZDRAVESKI ZORAN | See Remarks | Sale | 4,181 | $16.03 | $67,021 | 135,911 | Dec 23, 2019 |
| ISACSON CHRISTINA K. | Chief Business Officer | Sale | 9,867 | $16.03 | $158,168 | 88,249 | Dec 23, 2019 |
| GARDNER JASON | See Remarks | Sale | 2,897 | $15.10 | $43,745 | 265,212 | Dec 23, 2019 |