CIK 0001701108 · Non-accelerated filer<br>Smaller reporting company
Spero Therapeutics, Inc.
Sign in to watch- Ticker
- 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 |
|---|---|---|---|---|---|---|
| 2026-11-10 | HO WILLIAM Director | Grant or award · Stock Option (right to buy) | +100,000 | 100,000 | ||
| 2026-11-09 | Rajavelu Esther See Remarks | Sale | −40,851 | $1.04 | $42K | 946,000 |
| 2026-08-03 | Zack Debra Chief Medical Officer | Grant or award 10b5-1 | +162,311 | 162,311 | ||
| 2026-08-03 | Zack Debra Chief Medical Officer | Grant or award · Stock option (right to buy) 10b5-1 | +324,675 | 324,675 | ||
| 2026-06-23 | Deshpande Milind Director | Grant or award | +10,000 | 101,454 | ||
| 2026-06-23 | Deshpande Milind Director | Grant or award · Stock Option (right to buy) | +20,000 | 20,000 | ||
| 2026-06-23 | Tregoning Kathleen Director | Grant or award | +10,000 | 85,000 | ||
| 2026-06-23 | Tregoning Kathleen Director | Grant or award · Stock Option (right to buy) | +20,000 | 20,000 | ||
| 2026-06-23 | Smith Cynthia Director | Grant or award | +10,000 | 85,000 | ||
| 2026-06-23 | Smith Cynthia Director | Grant or award · Stock Option (right to buy) | +20,000 | 20,000 | ||
| 2026-06-23 | VINK PATRICK V.J.J. Director | Grant or award | +10,000 | 85,000 | ||
| 2026-06-23 | VINK PATRICK V.J.J. Director | Grant or award · Stock Option (right to buy) | +20,000 | 20,000 | ||
| 2026-06-23 | THOMAS FRANK E Director | Grant or award | +10,000 | 85,000 | ||
| 2026-06-23 | THOMAS FRANK E Director | Grant or award · Stock Option (right to buy) | +20,000 | 20,000 | ||
| 2026-06-23 | Jackson Scott Thomas Director | Grant or award | +10,000 | 85,000 | ||
| 2026-06-23 | Jackson Scott Thomas Director | Grant or award · Stock Option (right to buy) | +20,000 | 20,000 | ||
| 2026-06-23 | Pottage John C Jr Director | Grant or award | +10,000 | 85,000 | ||
| 2026-06-23 | Pottage John C Jr Director | Grant or award · Stock Option (right to buy) | +20,000 | 20,000 | ||
| 2026-05-04 | Rajavelu Esther See Remarks | Sale | −25,240 | $2.51 | $63K | 986,851 |
| 2026-02-06 | Rajavelu Esther See Remarks | Sale | −37,101 | $2.36 | $88K | 1,062,907 |
Page 1 of 8 · 157 trades