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 |
|---|---|---|---|---|---|---|---|
| HAMED KAMAL | Chief Medical Officer | Award / Grant | 140,000 | — | — | 615,957 | Jun 12, 2023 |
| Mahadevia Ankit | CEO and President | Sale | 12,286 | $1.81 | $22,238 | 797,832 | Feb 3, 2023 |
| Shukla Sath | Chief Financial Officer | Award / Grant | 265,957 | — | — | 322,021 | Feb 2, 2023 |
| Keutzer Timothy | Chief Operating Officer | Sale | 3,394 | $1.86 | $6,313 | 327,144 | Feb 1, 2023 |
| JOSEPH TAMARA L | Chief Legal Officer | Sale | 3,394 | $1.86 | $6,313 | 324,644 | Feb 1, 2023 |
| HAMED KAMAL | Chief Medical Officer | Award / Grant | 265,957 | — | — | 475,957 | Feb 1, 2023 |
| Mahadevia Ankit | CEO and President | Award / Grant | 531,914 | — | — | 810,118 | Feb 1, 2023 |
| Aquilo Capital Management, LLC | — | Sale | 1,335,512 | $2.25 | $3,004,902 | 3,985,719 | Sep 22, 2022 |
| Jackson Scott Thomas | — | Award / Grant | 15,000 | — | — | 15,000 | Sep 15, 2022 |
| Deshpande Milind | — | Award / Grant | 15,000 | — | — | 31,454 | Sep 15, 2022 |
| Pottage John C Jr | — | Award / Grant | 15,000 | — | — | 15,000 | Sep 15, 2022 |
| Smith Cynthia | — | Award / Grant | 15,000 | — | — | 15,000 | Sep 15, 2022 |
| THOMAS FRANK E | — | Award / Grant | 15,000 | — | — | 15,000 | Sep 15, 2022 |
| Tregoning Kathleen | — | Award / Grant | 15,000 | — | — | 15,000 | Sep 15, 2022 |
| VINK PATRICK V.J.J. | — | Award / Grant | 15,000 | — | — | 15,000 | Sep 15, 2022 |
| HAMED KAMAL | Chief Medical Officer | Award / Grant | 210,000 | — | — | 210,000 | Sep 12, 2022 |
| Shukla Sath | Chief Financial Officer | Sale | 6,017 | $0.89 | $5,355 | 56,064 | Aug 29, 2022 |
| Aquilo Capital, L.P. | — | Purchase | 39,727 | $5.24 | $208,169 | 5,321,231 | Apr 26, 2022 |
| Aquilo Capital Management, LLC | — | Purchase | 33,115 | $8.79 | $291,081 | 5,264,619 | Mar 30, 2022 |
| Aquilo Capital, L.P. | — | Purchase | 8,006 | $7.63 | $61,086 | 5,231,504 | Mar 14, 2022 |
| Aquilo Capital, L.P. | — | Purchase | 29,729 | $9.53 | $283,317 | 5,192,692 | Feb 28, 2022 |
| Aquilo Capital Management, LLC | — | Purchase | 14,828 | $9.24 | $137,011 | 5,162,963 | Feb 18, 2022 |
| Melnick David A. | Chief Medical Officer | Award / Grant | 38,014 | — | — | 62,081 | Feb 1, 2022 |
| Shukla Sath | Chief Financial Officer | Award / Grant | 38,014 | — | — | 62,081 | Feb 1, 2022 |
| Larkin Cristina | Chief Operating Officer | Award / Grant | 38,014 | — | — | 63,581 | Feb 1, 2022 |
| Mahadevia Ankit | CEO and President | Award / Grant | 134,168 | — | — | 278,204 | Feb 1, 2022 |
| Keutzer Timothy | Chief Development Officer | Award / Grant | 38,014 | — | — | 64,581 | Feb 1, 2022 |
| JOSEPH TAMARA L | Chief Legal Officer | Award / Grant | 38,014 | — | — | 62,081 | Feb 1, 2022 |
| Aquilo Capital Management, LLC | — | Purchase | 125,000 | $11.59 | $1,448,750 | 5,148,135 | Jan 31, 2022 |
| Aquilo Capital, L.P. | — | Purchase | 1,599 | $10.89 | $17,413 | 5,023,135 | Jan 24, 2022 |
| Aquilo Capital Management, LLC | — | Purchase | 48,488 | $12.41 | $601,736 | 5,021,536 | Jan 18, 2022 |
| Aquilo Capital Management, LLC | — | Purchase | 8,867 | $12.93 | $114,650 | 4,973,048 | Jan 10, 2022 |
| Aquilo Capital Management, LLC | — | Purchase | 75,493 | $14.64 | $1,105,218 | 4,789,181 | Dec 31, 2021 |
| Mahadevia Ankit | CEO and President | Option Exercise | 8,000 | $5.90 | $47,200 | 152,036 | Dec 27, 2021 |
| Aquilo Capital, L.P. | — | Purchase | 150,000 | $17.53 | $2,629,500 | 4,713,688 | Oct 29, 2021 |
| Aquilo Capital, L.P. | — | Purchase | 134,543 | $18.65 | $2,509,227 | 4,563,688 | Sep 30, 2021 |
| Aquilo Capital, L.P. | — | Purchase | 44,210 | $18.56 | $820,538 | 4,426,989 | Sep 14, 2021 |
| Aquilo Capital Management, LLC | — | Purchase | 24,749 | $18.50 | $457,857 | 4,382,779 | Sep 9, 2021 |
| Aquilo Capital Management, LLC | — | Purchase | 48,645 | $18.93 | $920,850 | 4,358,030 | Aug 30, 2021 |
| Aquilo Capital, L.P. | — | Purchase | 22,982 | $16.55 | $380,352 | 4,251,386 | Aug 27, 2021 |
| Shukla Sath | Chief Financial Officer | Award / Grant | 24,067 | — | — | 24,067 | Aug 26, 2021 |
| Keutzer Timothy | Chief Development Officer | Award / Grant | 24,067 | — | — | 26,567 | Aug 26, 2021 |
| JOSEPH TAMARA L | Chief Legal Officer | Award / Grant | 24,067 | — | — | 24,067 | Aug 26, 2021 |
| Larkin Cristina | Chief Operating Officer | Award / Grant | 24,067 | — | — | 25,567 | Aug 26, 2021 |
| Mahadevia Ankit | CEO and President | Award / Grant | 78,219 | — | — | 144,036 | Aug 26, 2021 |
| Melnick David A. | Chief Medical Officer | Award / Grant | 24,067 | — | — | 24,067 | Aug 26, 2021 |
| Aquilo Capital, L.P. | — | Purchase | 137,835 | $16.33 | $2,250,846 | 4,188,234 | Aug 20, 2021 |
| Aquilo Capital Management, LLC | — | Sale | 3,000 | $21.74 | $65,220 | 3,829,209 | Feb 8, 2021 |
| Aquilo Capital, L.P. | — | Sale | 34,144 | $18.99 | $648,395 | 3,832,209 | Feb 1, 2021 |
| Larkin Cristina | Chief Operating Officer | Sale | 12,000 | $19.00 | $228,000 | 1,500 | Dec 16, 2020 |