Spero 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.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Rajavelu Esther | See Remarks | Sale | 40,270 | $2.37 | $95,440 | 869,450 | Nov 7, 2025 |
| Mahadevia Ankit | — | Sale | 6,572 | $1.97 | $12,947 | 703,294 | Aug 28, 2025 |
| Keutzer Timothy | Chief Operating Officer | Sale | 1,695 | $1.97 | $3,339 | 739,744 | Aug 28, 2025 |
| Mahadevia Ankit | — | Award / Grant | 20,000 | — | — | 709,866 | Jun 12, 2025 |
| Deshpande Milind | — | Award / Grant | 20,000 | — | — | 91,454 | Jun 12, 2025 |
| Jackson Scott Thomas | — | Award / Grant | 20,000 | — | — | 75,000 | Jun 12, 2025 |
| VINK PATRICK V.J.J. | — | Award / Grant | 20,000 | — | — | 75,000 | Jun 12, 2025 |
| Pottage John C Jr | — | Award / Grant | 20,000 | — | — | 75,000 | Jun 12, 2025 |
| Smith Cynthia | — | Award / Grant | 20,000 | — | — | 75,000 | Jun 12, 2025 |
| THOMAS FRANK E | — | Award / Grant | 20,000 | — | — | 75,000 | Jun 12, 2025 |
| Tregoning Kathleen | — | Award / Grant | 20,000 | — | — | 75,000 | Jun 12, 2025 |
| Rajavelu Esther | See Remarks | Award / Grant | 185,000 | — | — | 909,720 | May 2, 2025 |
| Rajavelu Esther | CFO & CBO | Award / Grant | 266,139 | — | — | 645,409 | Feb 5, 2025 |
| Shukla Sath | CEO & President | Award / Grant | 751,407 | — | — | 1,892,216 | Feb 5, 2025 |
| Mahadevia Ankit | — | Sale | 55,260 | $0.78 | $43,103 | 689,866 | Feb 5, 2025 |
| Keutzer Timothy | Chief Operating Officer | Sale | 3,974 | $0.78 | $3,100 | 794,002 | Feb 3, 2025 |
| Rajavelu Esther | CFO & CBO | Sale | 23,351 | $1.31 | $30,590 | 396,515 | Nov 8, 2024 |
| Mahadevia Ankit | — | Sale | 5,912 | $1.35 | $7,981 | 759,085 | Aug 27, 2024 |
| Keutzer Timothy | Chief Operating Officer | Sale | 2,213 | $1.35 | $2,988 | 531,837 | Aug 27, 2024 |
| Shukla Sath | CEO & President | Sale | 2,757 | $1.35 | $3,722 | 1,140,809 | Aug 27, 2024 |
| Shukla Sath | CEO and President | Sale | 17,641 | $1.31 | $23,110 | 1,143,566 | Aug 2, 2024 |
| Deshpande Milind | — | Award / Grant | 20,000 | — | — | 71,454 | May 29, 2024 |
| Jackson Scott Thomas | — | Award / Grant | 20,000 | — | — | 55,000 | May 29, 2024 |
| Mahadevia Ankit | — | Award / Grant | 20,000 | — | — | 764,997 | May 29, 2024 |
| Tregoning Kathleen | — | Award / Grant | 20,000 | — | — | 55,000 | May 29, 2024 |
| VINK PATRICK V.J.J. | — | Award / Grant | 20,000 | — | — | 55,000 | May 29, 2024 |
| Smith Cynthia | — | Award / Grant | 20,000 | — | — | 55,000 | May 29, 2024 |
| THOMAS FRANK E | — | Award / Grant | 20,000 | — | — | 55,000 | May 29, 2024 |
| Pottage John C Jr | — | Award / Grant | 20,000 | — | — | 55,000 | May 29, 2024 |
| Mahadevia Ankit | — | Sale | 63,795 | $1.37 | $87,399 | 744,997 | Feb 2, 2024 |
| Keutzer Timothy | Chief Operating Officer | Sale | 30,971 | $1.36 | $42,121 | 534,050 | Feb 1, 2024 |
| JOSEPH TAMARA L | Chief Legal Officer | Sale | 30,906 | $1.37 | $42,341 | 531,615 | Feb 1, 2024 |
| HAMED KAMAL | Chief Medical Officer | Sale | 28,075 | $1.37 | $38,463 | 788,117 | Feb 1, 2024 |
| Rajavelu Esther | See Remarks | Award / Grant | 119,866 | — | — | 419,866 | Feb 1, 2024 |
| Shukla Sath | CEO and President | Sale | 30,901 | $1.37 | $42,334 | 1,221,100 | Feb 1, 2024 |
| Rajavelu Esther | See Remarks | Award / Grant | 300,000 | — | — | 300,000 | Nov 13, 2023 |
| Pottage John C Jr | — | Award / Grant | 20,000 | — | — | 35,000 | Oct 5, 2023 |
| Smith Cynthia | — | Award / Grant | 20,000 | — | — | 35,000 | Oct 5, 2023 |
| THOMAS FRANK E | — | Award / Grant | 20,000 | — | — | 35,000 | Oct 5, 2023 |
| Deshpande Milind | — | Award / Grant | 20,000 | — | — | 51,454 | Oct 5, 2023 |
| Tregoning Kathleen | — | Award / Grant | 20,000 | — | — | 35,000 | Oct 5, 2023 |
| VINK PATRICK V.J.J. | — | Award / Grant | 20,000 | — | — | 35,000 | Oct 5, 2023 |
| Jackson Scott Thomas | — | Award / Grant | 20,000 | — | — | 35,000 | Oct 5, 2023 |
| Mahadevia Ankit | — | Award / Grant | 20,000 | — | — | 808,792 | Oct 5, 2023 |
| HAMED KAMAL | Chief Medical Officer | Sale | 39,496 | $1.27 | $50,160 | 576,461 | Sep 13, 2023 |
| Shukla Sath | CEO and President | Sale | 1,854 | $1.26 | $2,336 | 576,663 | Aug 29, 2023 |
| Keutzer Timothy | Chief Development Officer | Sale | 1,854 | $1.26 | $2,336 | 325,290 | Aug 28, 2023 |
| JOSEPH TAMARA L | Chief Legal Officer | Sale | 1,854 | $1.26 | $2,336 | 322,790 | Aug 28, 2023 |
| Mahadevia Ankit | — | Sale | 9,040 | $1.26 | $11,390 | 788,792 | Aug 28, 2023 |
| Shukla Sath | CEO and President | Award / Grant | 266,000 | — | — | 578,517 | Aug 1, 2023 |