Spero Therapeutics, Inc. (SPRO) has 81 open-market insider trades by 20 insiders since 2008. Over the last six months insiders net sold $63K. The most active filer is Aquilo Capital, L.P., 10% Owner.
| Name | Title | Tier | Trades | Value | Last Trade |
|---|---|---|---|---|---|
| Aquilo Capital, L.P. | 10% Owner | — | 13 | $37.8M | 2022-04-26 |
| Aquilo Capital Management, LLC | 10% Owner | — | 10 | $17.7M | 2022-09-22 |
| Glaxosmithkline PLC | 10% Owner | — | 2 | $7.0M | 2018-07-17 |
| Vikas Goyal | Dir | — | 1 | $6.0M | 2017-11-06 |
| Jean Francois Formela | Dir | — | 1 | $6.0M | 2017-11-06 |
| Casper Breum | Dir | — | 1 | $3.0M | 2017-11-06 |
| Ankit Mahadevia | Dir | — | 12 | $1.0M | 2025-08-28 |
| Esther Rajavelu | — | — | 6 | $571K | 2026-05-04 |
| Cristina Larkin | COO | — | 3 | $319K | 2022-02-01 |
| Sath Shukla | CEOPres | — | 3 | $251K | 2025-02-05 |
| Insider | Title | Type | Value | Date |
|---|---|---|---|---|
| Esther Rajavelu | — | Sell | $63K | 2026-05-04 |
| Timothy Keutzer | COO | Sell | $44K | 2026-02-06 |
| Esther Rajavelu | — | Sell | $207K | 2026-02-06 |
| Esther Rajavelu | — | Sell | $41K | 2026-02-02 |
| Timothy Keutzer | COO | Sell | $101K | 2026-02-02 |
| Esther Rajavelu | — | Sell | $191K | 2025-11-07 |
Companies that share insiders with SPRO, and sector peers with recent insider buying. Related by who files, not by how the stocks move.
| Timothy Keutzer | COO | Sell | $3K | 2025-08-28 |
| Ankit Mahadevia | Director | Sell | $13K | 2025-08-28 |
| Ankit Mahadevia | Director | Sell | $54K | 2025-02-05 |
| Esther Rajavelu | CFO & CBO | Sell | $16K | 2025-02-05 |
| Sath Shukla | CEO & President | Sell | $204K | 2025-02-05 |
| Timothy Keutzer | COO | Sell | $44K | 2025-02-05 |
| Esther Rajavelu | CFO & CBO | Sell | $53K | 2024-11-07 |
| Timothy Keutzer | COO | Sell | $3K | 2024-08-27 |
| Sath Shukla | President | Sell | $4K | 2024-08-27 |