SPRO · ISSUER CIK 1701108
Spero Therapeutics, Inc.
Between Aug 1, 2026 and Oct 29, 2026, 1 Spero Therapeutics, Inc. insiders reported $0.00 of open-market purchases and $0.00 of sales on SEC Form 4.
↗1 insiders filed
Original Form 4 filings from Aug 1, 2026 to Oct 29, 2026. No open-market sales in the window.
$0.00Insider buying
$0.00Insider selling
$0.00Net open-market
Aug 6, 2026Latest filing
| Ticker | Insider | Type | Owned | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 6, 202618:49 | Aug 3, 2026 | SPRO | Chief Medical Officer | A · Grant10b5-1 | — | +162,311 | 162,311 | New | — |