CIK 0001701108 · Non-accelerated filer<br>Smaller reporting company
Spero Therapeutics, Inc.
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- SPRO
- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- Phone
- 857-242-1600
- Business address
- 675 MASSACHUSETTS AVENUE, 14TH FLOOR, CAMBRIDGE, MA, 02139
- Former names
- Spero Therapeutics, LLC
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $42,485
- in 1 filing
Net −$42,485. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 95 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-02-06 | Rajavelu Esther See Remarks | Sale | −50,816 | $2.36 | $120K | 1,012,091 |
| 2026-02-06 | Keutzer Timothy Chief Operating Officer | Sale | −18,652 | $2.36 | $44K | 742,506 |
| 2026-02-04 | Keutzer Timothy Chief Operating Officer | Sale | −3,471 | $2.24 | $8K | 761,158 |
| 2026-02-03 | Keutzer Timothy Chief Operating Officer | Sale | −24,224 | $2.14 | $52K | 764,629 |
| 2026-02-02 | Keutzer Timothy Chief Operating Officer | Grant or award | +68,000 | 807,744 | ||
| 2026-02-02 | Keutzer Timothy Chief Operating Officer | Sale | −18,891 | $2.20 | $42K | 788,853 |
| 2026-02-02 | Keutzer Timothy Chief Operating Officer | Grant or award · Stock Option (Right to Buy) | +137,000 | 137,000 | ||
| 2026-02-02 | Rajavelu Esther See Remarks | Grant or award | +249,000 | 1,118,450 | ||
| 2026-02-02 | Rajavelu Esther See Remarks | Sale | −18,442 | $2.20 | $41K | 1,100,008 |
| 2026-02-02 | Rajavelu Esther See Remarks | Grant or award · Stock Option (Right to Buy) | +498,000 | 498,000 | ||
| 2025-11-07 | Rajavelu Esther See Remarks | Sale | −40,270 | $2.37 | $95K | 869,450 |
| 2025-08-28 | Mahadevia Ankit Director | Sale | −6,572 | $1.97 | $13K | 703,294 |
| 2025-08-28 | Keutzer Timothy Chief Operating Officer | Sale | −1,695 | $1.97 | $3K | 739,744 |
| 2025-06-12 | Mahadevia Ankit Director | Grant or award | +20,000 | 709,866 | ||
| 2025-06-12 | Deshpande Milind Director | Grant or award | +20,000 | 91,454 | ||
| 2025-06-12 | Jackson Scott Thomas Director | Grant or award | +20,000 | 75,000 | ||
| 2025-06-12 | VINK PATRICK V.J.J. Director | Grant or award | +20,000 | 75,000 | ||
| 2025-06-12 | Pottage John C Jr Director | Grant or award | +20,000 | 75,000 | ||
| 2025-06-12 | Smith Cynthia Director | Grant or award | +20,000 | 75,000 | ||
| 2025-06-12 | THOMAS FRANK E Director | Grant or award | +20,000 | 75,000 |
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