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 100 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 |
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