Spero Therapeutics, Inc. (SPRO)
Data as of , from SEC Form 4 filings.
No open-market insider trades (90d)Watch SPRO
See up to 3 months of SPRO. The 7-day demo opens the 1M and 3M ranges and puts SPRO on your watchlist.
Start 7-day demoLatest SPRO insider trades
About Spero Therapeutics, Inc. (SPRO)
Spero Therapeutics, Inc. files with the SEC under CIK 0001701108 and is classified as pharmaceutical preparations. It is grouped with Health Care companies on this site.
SPRO Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Grant or award | 2 | 486,986 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
SPRO insider transactions (Form 4)
3418 Form 4 filings on record, the earliest from Nov 12, 2024, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Debra Zack - Officer | Grant or award | Common Stock | 162,311 footnote F1 | $0.00 | - | |
| Debra Zack - Officer | Grant or award | Stock option (right to buy) | 324,675 | $0.00 | - | |
| ||||||
| Milind Deshpande | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| Milind Deshpande | Grant or award | Stock Option (right to buy) | 20,000 | $0.00 | - | |
| ||||||
| Kathleen Tregoning | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| Kathleen Tregoning | Grant or award | Stock Option (right to buy) | 20,000 | $0.00 | - | |
| ||||||
| Cynthia Smith | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| Cynthia Smith | Grant or award | Stock Option (right to buy) | 20,000 | $0.00 | - | |
| ||||||
| Patrick V.J.J. Vink | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| Patrick V.J.J. Vink | Grant or award | Stock Option (right to buy) | 20,000 | $0.00 | - | |
| ||||||
| Frank E. Thomas | Grant or award | Stock Option (right to buy) | 20,000 | $0.00 | - | |
| Frank E. Thomas | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| ||||||
| Scott Thomas Jackson | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| Scott Thomas Jackson | Grant or award | Stock Option (right to buy) | 20,000 | $0.00 | - | |
| ||||||
| John C. Pottage Jr. | Grant or award | Stock Option (right to buy) | 20,000 | $0.00 | - | |
| John C. Pottage Jr. | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| ||||||
| Esther Rajavelu - Officer | Open-market sale | Common Stock | 25,240 footnote F1 | $2.51 | $63K | |
| ||||||
| Esther Rajavelu - Officer | Open-market sale | Common Stock | 37,101 footnote F1 | $2.36 | $88K | |
| Esther Rajavelu - Officer | Open-market sale | Common Stock | 50,816 footnote F1 | $2.36 | $120K | |
| ||||||
| Timothy Keutzer - Officer | Open-market sale | Common Stock | 18,652 footnote F1 | $2.36 | $44K | |
| ||||||
| Timothy Keutzer - Officer | Grant or award | Common Stock | 68,000 footnote F1 | $0.00 | - | |
| Timothy Keutzer - Officer | Open-market sale | Common Stock | 18,891 footnote F2 | $2.20 | $42K | |
| Timothy Keutzer - Officer | Open-market sale | Common Stock | 24,224 footnote F2 | $2.14 | $52K | |
| Timothy Keutzer - Officer | Open-market sale | Common Stock | 3,471 footnote F2 | $2.24 | $8K | |
| Timothy Keutzer - Officer | Grant or award | Stock Option (Right to Buy) | 137,000 | $0.00 | - | |
| ||||||
| Esther Rajavelu - Officer | Grant or award | Common Stock | 249,000 footnote F1 | $0.00 | - | |
| Esther Rajavelu - Officer | Open-market sale | Common Stock | 18,442 footnote F2 | $2.20 | $41K | |
| Esther Rajavelu - Officer | Grant or award | Stock Option (Right to Buy) | 498,000 | $0.00 | - | |
| ||||||
| Esther Rajavelu - Officer | Open-market sale | Common Stock | 40,270 footnote F1 | $2.37 | $95K | |
| ||||||
| Ankit Mahadevia | Open-market sale | Common Stock | 6,572 | $1.97 | $13K | |
| Timothy Keutzer - Officer | Open-market sale | Common Stock | 1,695 | $1.97 | $3K | |
| Frank E. Thomas | Grant or award | Common Stock | 20,000 | $0.00 | - | |
| Esther Rajavelu - Officer | Open-market sale | Common Stock | 23,351 | $1.31 | $31K | |
| Esther Rajavelu - Officer | Open-market sale | Common Stock | 17,245 | $1.30 | $22K | |
Item 1.01, 8.01, 9.01
Item 2.02, 9.01
Item 1.01, 2.03, 7.01, 8.01, 9.01
Item 5.02, 5.03, 5.07, 9.01
SPRO insider trading FAQ
What is the latest insider trade for SPRO?
Spero Therapeutics, Inc. (SPRO) had 1 insider filing in the last 90 days, with the most recent on 2026-08-06. The full record for SPRO runs to 18 Form 4 filings, the earliest from 2024-11-12. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying SPRO stock?
No insider purchases of SPRO were filed in the last 90 days.
How many insiders are selling SPRO stock?
No insider sales of SPRO were filed in the last 90 days. 13 sales are on record for this company.
Where can I see SPRO SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects SPRO Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Debra Zack view on EDGAR
- - Milind Deshpande view on EDGAR
- - Kathleen Tregoning view on EDGAR
- - Cynthia Smith view on EDGAR
- - Patrick V.J.J. Vink view on EDGAR
- - Frank E. Thomas view on EDGAR
- - Scott Thomas Jackson view on EDGAR
- - John C. Pottage Jr. view on EDGAR
- - Esther Rajavelu view on EDGAR
Related companies with recent insider activity
Learn more
- What the Form 4 transaction codes mean
- Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
- Insider activity in Health Care
- Where SPRO's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
Follow SPRO with a 7-day demo
- SPRO on your watchlist
- Every SPRO Form 4 filing on record
- Up to 3 months of SPRO price history
- The daily trading plan of ranked insider buys, on a delay, with the plan archive
Start 7-day demoCard required. Your card is never charged for the demo.
