SPRO Spero Therapeutics, Inc.
Nasdaq · SEC CIK 1701108 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $552.0K 6 sales by 2 insiders
- Filings on record
- 124 since 2021-08-18, latest 2026-08-06 18:49
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| Rajavelu Esther | See Remarks | — | $406.8K |
| Keutzer Timothy | COO | — | $145.2K |
| Tregoning Kathleen | Dir | — | — |
| Zack Debra | Chief Medical Off | — | — |
| Smith Cynthia | Dir | — | — |
| Jackson Scott Thomas | Dir | — | — |
| VINK PATRICK V.J.J. | Dir | — | — |
| Deshpande Milind | Dir | — | — |
| Pottage John C Jr | Dir | — | — |
| THOMAS FRANK E | Dir | — | — |
Transactions 123
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-08-06 18:49 | 2026-08-03 | SPRO | Zack Debra | Chief Medical Off | A - Grant | $0.00 | +162.3K | 162.3K | New | $0 |
| D | 2026-06-25 19:26 | 2026-06-23 | SPRO | Deshpande Milind | Dir | A - Grant | $0.00 | +10.0K | 101.5K | +11% | $0 |
| D | 2026-06-25 19:17 | 2026-06-23 | SPRO | Tregoning Kathleen | Dir | A - Grant | $0.00 | +10.0K | 85.0K | +13% | $0 |
| D | 2026-06-25 19:14 | 2026-06-23 | SPRO | Smith Cynthia | Dir | A - Grant | $0.00 | +10.0K | 85.0K | +13% | $0 |
| D | 2026-06-25 19:12 | 2026-06-23 | SPRO | VINK PATRICK V.J.J. | Dir | A - Grant | $0.00 | +10.0K | 85.0K | +13% | $0 |
| D | 2026-06-25 18:59 | 2026-06-23 | SPRO | THOMAS FRANK E | Dir | A - Grant | $0.00 | +10.0K | 85.0K | +13% | $0 |
| D | 2026-06-25 18:57 | 2026-06-23 | SPRO | Jackson Scott Thomas | Dir | A - Grant | $0.00 | +10.0K | 85.0K | +13% | $0 |
| D | 2026-06-25 18:55 | 2026-06-23 | SPRO | Pottage John C Jr | Dir | A - Grant | $0.00 | +10.0K | 85.0K | +13% | $0 |
| 2026-05-06 21:53 | 2026-05-04 | SPRO | Rajavelu Esther | See Remarks | S - Sale | $2.51 | -25.2K | 986.9K | -2% | -$63.4K | |
| M | 2026-02-09 | 2026-02-06 | SPRO | Rajavelu Esther | See Remarks | S - Sale | $2.36 | -87.9K | 1.01M | -8% | -$207.5K |
| 2026-02-09 | 2026-02-06 | SPRO | Keutzer Timothy | COO | S - Sale | $2.36 | -18.7K | 742.5K | -2% | -$44.0K | |
| DM | 2026-02-05 | 2026-02-02+ | SPRO | Keutzer Timothy | COO | S - Sale | $2.17 | -46.6K | 788.9K | -6% | -$101.2K |
| D | 2026-02-05 | 2026-02-02 | SPRO | Keutzer Timothy | COO | A - Grant | $0.00 | +68.0K | 807.7K | +9% | $0 |
| D | 2026-02-04 | 2026-02-02 | SPRO | Rajavelu Esther | See Remarks | S - Sale | $2.20 | -18.4K | 1.10M | -2% | -$40.6K |
| D | 2026-02-04 | 2026-02-02 | SPRO | Rajavelu Esther | See Remarks | A - Grant | $0.00 | +249.0K | 1.12M | +29% | $0 |
| 2025-11-12 | 2025-11-07 | SPRO | Rajavelu Esther | See Remarks | S - Sale | $2.37 | -40.3K | 869.5K | -4% | -$95.4K | |
| 2025-09-03 | 2025-08-28 | SPRO | Mahadevia Ankit | Dir | S - Sale | $1.97 | -6,572 | 703.3K | -0.9% | -$12.9K | |
| 2025-09-03 | 2025-08-28 | SPRO | Keutzer Timothy | COO | S - Sale | $1.97 | -1,695 | 739.7K | -0.2% | -$3,339 | |
| 2025-06-16 | 2025-06-12 | SPRO | VINK PATRICK V.J.J. | Dir | A - Grant | $0.00 | +20.0K | 75.0K | +36% | $0 | |
| 2025-06-16 | 2025-06-12 | SPRO | Deshpande Milind | Dir | A - Grant | $0.00 | +20.0K | 91.5K | +28% | $0 | |
| 2025-06-16 | 2025-06-12 | SPRO | THOMAS FRANK E | Dir | A - Grant | $0.00 | +20.0K | 75.0K | +36% | $0 | |
| 2025-06-16 | 2025-06-12 | SPRO | Mahadevia Ankit | Dir | A - Grant | $0.00 | +20.0K | 709.9K | +3% | $0 | |
| 2025-06-16 | 2025-06-12 | SPRO | Jackson Scott Thomas | Dir | A - Grant | $0.00 | +20.0K | 75.0K | +36% | $0 | |
| 2025-06-16 | 2025-06-12 | SPRO | Smith Cynthia | Dir | A - Grant | $0.00 | +20.0K | 75.0K | +36% | $0 | |
| 2025-06-16 | 2025-06-12 | SPRO | Tregoning Kathleen | Dir | A - Grant | $0.00 | +20.0K | 75.0K | +36% | $0 | |
| 2025-06-16 | 2025-06-12 | SPRO | Pottage John C Jr | Dir | A - Grant | $0.00 | +20.0K | 75.0K | +36% | $0 | |
| 2025-05-06 | 2025-05-02 | SPRO | Rajavelu Esther | See Remarks | A - Grant | $0.00 | +185.0K | 909.7K | +26% | $0 | |
| 2025-02-05 | 2025-02-03 | SPRO | Keutzer Timothy | COO | A - Grant | $0.00 | +266.1K | 798.0K | +50% | $0 | |
| M | 2025-02-05 | 2025-02-05 | SPRO | Keutzer Timothy | COO | S - Sale | $0.78 | -56.5K | 794.0K | -7% | -$44.1K |
| M | 2025-02-05 | 2025-02-05 | SPRO | Mahadevia Ankit | Dir | S - Sale | $0.78 | -69.2K | 689.9K | -9% | -$54.0K |
| 2025-02-05 | 2025-02-05 | SPRO | Rajavelu Esther | CFO, CBO | S - Sale | $0.78 | -20.7K | 724.7K | -3% | -$16.1K | |
| M | 2025-02-05 | 2025-02-03 | SPRO | Rajavelu Esther | CFO, CBO | A - Grant | $0.00 | +366.1K | 645.4K | +131% | $0 |
| M | 2025-02-05 | 2025-02-05 | SPRO | Shukla Sath | CEO, Pres | S - Sale | $0.78 | -155.3K | 1.89M | -8% | -$121.2K |
| 2025-02-05 | 2025-02-03 | SPRO | Shukla Sath | CEO, Pres | A - Grant | $0.00 | +751.4K | 1.89M | +66% | $0 | |
| M | 2024-11-12 | 2024-11-07+ | SPRO | Rajavelu Esther | CFO, CBO | S - Sale | $1.31 | -40.6K | 396.5K | -9% | -$53.0K |
| 2024-08-29 | 2024-08-27 | SPRO | Shukla Sath | CEO, Pres | S - Sale | $1.35 | -2,757 | 1.14M | -0.2% | -$3,722 | |
| 2024-08-29 | 2024-08-27 | SPRO | Keutzer Timothy | COO | S - Sale | $1.35 | -2,213 | 531.8K | -0.4% | -$2,988 | |
| 2024-08-29 | 2024-08-27 | SPRO | Mahadevia Ankit | Dir | S - Sale | $1.35 | -5,912 | 759.1K | -0.8% | -$7,981 | |
| M | 2024-08-06 | 2024-08-02+ | SPRO | Shukla Sath | CEO, Pres | S - Sale | $1.31 | -32.4K | 1.14M | -3% | -$42.6K |
| 2024-05-30 | 2024-05-29 | SPRO | VINK PATRICK V.J.J. | Dir | A - Grant | $0.00 | +20.0K | 55.0K | +57% | $0 | |
| 2024-05-30 | 2024-05-29 | SPRO | Deshpande Milind | Dir | A - Grant | $0.00 | +20.0K | 71.5K | +39% | $0 | |
| 2024-05-30 | 2024-05-29 | SPRO | Mahadevia Ankit | Dir | A - Grant | $0.00 | +20.0K | 765.0K | +3% | $0 | |
| 2024-05-30 | 2024-05-29 | SPRO | THOMAS FRANK E | Dir | A - Grant | $0.00 | +20.0K | 55.0K | +57% | $0 | |
| 2024-05-30 | 2024-05-29 | SPRO | Pottage John C Jr | Dir | A - Grant | $0.00 | +20.0K | 55.0K | +57% | $0 | |
| 2024-05-30 | 2024-05-29 | SPRO | Jackson Scott Thomas | Dir | A - Grant | $0.00 | +20.0K | 55.0K | +57% | $0 | |
| 2024-05-30 | 2024-05-29 | SPRO | Smith Cynthia | Dir | A - Grant | $0.00 | +20.0K | 55.0K | +57% | $0 | |
| 2024-05-30 | 2024-05-29 | SPRO | Tregoning Kathleen | Dir | A - Grant | $0.00 | +20.0K | 55.0K | +57% | $0 | |
| 2024-02-05 | 2024-02-02 | SPRO | Mahadevia Ankit | Dir | S - Sale | $1.37 | -63.8K | 745.0K | -8% | -$87.4K | |
| 2024-02-05 | 2024-02-01 | SPRO | HAMED KAMAL | Chief Medical Off | A - Grant | $0.00 | +239.7K | 816.2K | +42% | $0 | |
| 2024-02-05 | 2024-02-02 | SPRO | HAMED KAMAL | Chief Medical Off | S - Sale | $1.37 | -28.1K | 788.1K | -3% | -$38.5K | |
| 2024-02-05 | 2024-02-01 | SPRO | JOSEPH TAMARA L | CLO | A - Grant | $0.00 | +239.7K | 562.5K | +74% | $0 | |
| 2024-02-05 | 2024-02-02 | SPRO | JOSEPH TAMARA L | CLO | S - Sale | $1.37 | -30.9K | 531.6K | -5% | -$42.3K | |
| 2024-02-05 | 2024-02-01 | SPRO | Keutzer Timothy | COO | A - Grant | $0.00 | +239.7K | 565.0K | +74% | $0 | |
| 2024-02-05 | 2024-02-02 | SPRO | Keutzer Timothy | COO | S - Sale | $1.36 | -31.0K | 534.0K | -5% | -$42.1K | |
| T | 2024-02-05 | 2024-02-01 | SPRO | Shukla Sath | CEO, Pres, Dir | A - Grant | $0.00 | +679.5K | 1.25M | +119% | $0 |
| MT | 2024-02-05 | 2024-02-02+ | SPRO | Shukla Sath | CEO, Pres, Dir | S - Sale | $1.42 | -76.0K | 1.22M | -6% | -$107.7K |
| 2024-02-05 | 2024-02-01 | SPRO | Rajavelu Esther | See Remarks | A - Grant | $0.00 | +119.9K | 419.9K | +40% | $0 | |
| 2023-11-15 | 2023-11-13 | SPRO | Rajavelu Esther | See Remarks | A - Grant | $0.00 | +300.0K | 300.0K | New | $0 | |
| 2023-10-10 | 2023-10-05 | SPRO | THOMAS FRANK E | Dir | A - Grant | $0.00 | +20.0K | 35.0K | +133% | $0 | |
| 2023-10-10 | 2023-10-05 | SPRO | Mahadevia Ankit | Dir | A - Grant | $0.00 | +20.0K | 808.8K | +3% | $0 | |
| 2023-10-10 | 2023-10-05 | SPRO | Jackson Scott Thomas | Dir | A - Grant | $0.00 | +20.0K | 35.0K | +133% | $0 | |
| 2023-10-10 | 2023-10-05 | SPRO | Tregoning Kathleen | Dir | A - Grant | $0.00 | +20.0K | 35.0K | +133% | $0 | |
| 2023-10-10 | 2023-10-05 | SPRO | Deshpande Milind | Dir | A - Grant | $0.00 | +20.0K | 51.5K | +64% | $0 | |
| 2023-10-10 | 2023-10-05 | SPRO | VINK PATRICK V.J.J. | Dir | A - Grant | $0.00 | +20.0K | 35.0K | +133% | $0 | |
| 2023-10-10 | 2023-10-05 | SPRO | Smith Cynthia | Dir | A - Grant | $0.00 | +20.0K | 35.0K | +133% | $0 | |
| 2023-10-10 | 2023-10-05 | SPRO | Pottage John C Jr | Dir | A - Grant | $0.00 | +20.0K | 35.0K | +133% | $0 | |
| 2023-09-15 | 2023-09-13 | SPRO | HAMED KAMAL | Chief Medical Off | S - Sale | $1.27 | -39.5K | 576.5K | -6% | -$50.2K | |
| 2023-08-30 | 2023-08-28 | SPRO | JOSEPH TAMARA L | CLO | S - Sale | $1.26 | -1,854 | 322.8K | -0.6% | -$2,336 | |
| 2023-08-30 | 2023-08-28 | SPRO | Mahadevia Ankit | Dir | S - Sale | $1.26 | -9,040 | 788.8K | -1% | -$11.4K | |
| 2023-08-30 | 2023-08-28 | SPRO | Keutzer Timothy | Chief Development Off | S - Sale | $1.26 | -1,854 | 325.3K | -0.6% | -$2,336 | |
| MT | 2023-08-30 | 2023-08-28+ | SPRO | Shukla Sath | CEO, Pres, Dir | S - Sale | $1.29 | -6,017 | 576.7K | -1% | -$7,748 |
| 2023-08-03 | 2023-08-01 | SPRO | Shukla Sath | CEO, Pres, Dir | A - Grant | $0.00 | +266.0K | 578.5K | +85% | $0 | |
| 2023-06-14 | 2023-06-12 | SPRO | HAMED KAMAL | Chief Medical Off | A - Grant | $0.00 | +140.0K | 616.0K | +29% | $0 | |
| 2023-02-06 | 2023-02-03 | SPRO | Mahadevia Ankit | CEO, Pres, Dir | S - Sale | $1.81 | -12.3K | 797.8K | -2% | -$22.2K | |
| 2023-02-03 | 2023-02-01 | SPRO | Keutzer Timothy | COO | A - Grant | $0.00 | +266.0K | 330.5K | +412% | $0 | |
| 2023-02-03 | 2023-02-02 | SPRO | Keutzer Timothy | COO | S - Sale | $1.86 | -3,394 | 327.1K | -1% | -$6,313 | |
| 2023-02-03 | 2023-02-01 | SPRO | Mahadevia Ankit | CEO, Pres, Dir | A - Grant | $0.00 | +531.9K | 810.1K | +191% | $0 | |
| 2023-02-03 | 2023-02-01 | SPRO | HAMED KAMAL | Chief Medical Off | A - Grant | $0.00 | +266.0K | 476.0K | +127% | $0 | |
| 2023-02-03 | 2023-02-01 | SPRO | JOSEPH TAMARA L | CLO | A - Grant | $0.00 | +266.0K | 328.0K | +428% | $0 | |
| 2023-02-03 | 2023-02-02 | SPRO | JOSEPH TAMARA L | CLO | S - Sale | $1.86 | -3,394 | 324.6K | -1% | -$6,313 | |
| 2023-02-03 | 2023-02-02 | SPRO | Shukla Sath | CFO | S - Sale | $1.83 | -9,504 | 312.5K | -3% | -$17.4K | |
| 2023-02-03 | 2023-02-01 | SPRO | Shukla Sath | CFO | A - Grant | $0.00 | +266.0K | 322.0K | +474% | $0 | |
| MI | 2022-09-26 | 2022-09-22 | SPRO | Aquilo Capital Management, LLC | 10% | S - Sale | $2.25 | -1.90M | 3.99M | -32% | -$4.28M |
| 2022-09-19 | 2022-09-15 | SPRO | Smith Cynthia | Dir | A - Grant | $0.00 | +15.0K | 15.0K | New | $0 | |
| 2022-09-19 | 2022-09-15 | SPRO | Pottage John C Jr | Dir | A - Grant | $0.00 | +15.0K | 15.0K | New | $0 | |
| 2022-09-19 | 2022-09-15 | SPRO | Deshpande Milind | Dir | A - Grant | $0.00 | +15.0K | 31.5K | +91% | $0 | |
| 2022-09-19 | 2022-09-15 | SPRO | Tregoning Kathleen | Dir | A - Grant | $0.00 | +15.0K | 15.0K | New | $0 | |
| 2022-09-19 | 2022-09-15 | SPRO | THOMAS FRANK E | Dir | A - Grant | $0.00 | +15.0K | 15.0K | New | $0 | |
| 2022-09-19 | 2022-09-15 | SPRO | VINK PATRICK V.J.J. | Dir | A - Grant | $0.00 | +15.0K | 15.0K | New | $0 | |
| 2022-09-19 | 2022-09-15 | SPRO | Jackson Scott Thomas | Dir | A - Grant | $0.00 | +15.0K | 15.0K | New | $0 | |
| 2022-09-14 | 2022-09-12 | SPRO | HAMED KAMAL | Chief Medical Off | A - Grant | $0.00 | +210.0K | 210.0K | New | $0 | |
| 2022-08-30 | 2022-08-29 | SPRO | Shukla Sath | CFO | S - Sale | $0.89 | -6,017 | 56.1K | -10% | -$5,355 | |
| I | 2022-04-28 | 2022-04-26 | SPRO | Aquilo Capital, L.P. | 10% | P - Purchase | $5.24 | +39.7K | 5.32M | +0.8% | +$208.2K |
| MI | 2022-03-31 | 2022-03-30 | SPRO | Aquilo Capital Management, LLC | 10% | P - Purchase | $8.79 | +50.0K | 5.26M | +1.0% | +$439.5K |
| MI | 2022-03-16 | 2022-03-14 | SPRO | Aquilo Capital, L.P. | 10% | P - Purchase | $7.63 | +23.7K | 5.23M | +0.5% | +$180.9K |
| MI | 2022-03-02 | 2022-02-28 | SPRO | Aquilo Capital, L.P. | 10% | P - Purchase | $9.53 | +44.8K | 5.19M | +0.9% | +$427.3K |
| I | 2022-02-23 | 2022-02-18 | SPRO | Aquilo Capital Management, LLC | 10% | P - Purchase | $9.24 | +14.8K | 5.16M | +0.3% | +$137.0K |
| D | 2022-02-03 | 2022-02-01 | SPRO | Keutzer Timothy | Chief Development Off | A - Grant | $0.00 | +38.0K | 64.6K | +143% | $0 |
| D | 2022-02-03 | 2022-02-01 | SPRO | Melnick David A. | Chief Medical Off | A - Grant | $0.00 | +38.0K | 62.1K | +158% | $0 |
| D | 2022-02-03 | 2022-02-01 | SPRO | Larkin Cristina | COO | A - Grant | $0.00 | +38.0K | 63.6K | +149% | $0 |
Purchase Sale Sale after option exercise All abbreviations