SPRO
Spero Therapeutics, Inc. · 12 Form 4 · free tier: 48h delay
Recent Form 4 slice from EDGAR — up to 30 filings (not a full archive).
For informational purposes only. Not investment advice. Data is aggregated from public SEC and congressional disclosures. Nothing on this site is a recommendation to buy or sell any security. Public disclosure of a trade is not evidence of wrongdoing or insider trading.
Recent Form 4 trades
Open-market purchases and sales
1 trade in the last 48h is Pro-only
••••••••••••
SPRO · Trade · Nov 9, 2026 · Filed · Nov 10, 2026
$•••••
SPRO · Trade · May 4, 2026 · Filed · May 6, 2026 · filed 2 days after trade · Spero Therapeutics, Inc.
$63,352
25,240 sh
SPRO · Trade · Feb 6, 2026 · Filed · Feb 9, 2026 · filed 3 days after trade · Spero Therapeutics, Inc.
$44,019
18,652 sh
SPRO · Trade · Feb 6, 2026 · Filed · Feb 9, 2026 · filed 3 days after trade · Spero Therapeutics, Inc.
$207,484
87,917 sh · 2 tx
SPRO · Trade · Feb 4, 2026 · Filed · Feb 5, 2026 · Spero Therapeutics, Inc.
$7,775
3,471 sh
SPRO · Trade · Feb 3, 2026 · Filed · Feb 5, 2026 · filed 2 days after trade · Spero Therapeutics, Inc.
$51,839
24,224 sh
SPRO · Trade · Feb 2, 2026 · Filed · Feb 5, 2026 · filed 3 days after trade · Spero Therapeutics, Inc.
$41,560
18,891 sh
SPRO · Trade · Feb 2, 2026 · Filed · Feb 4, 2026 · filed 2 days after trade · Spero Therapeutics, Inc.
$40,572
18,442 sh
SPRO · Trade · Nov 7, 2025 · Filed · Nov 12, 2025 · filed 5 days after trade · Spero Therapeutics, Inc.
$95,440
40,270 sh
SPRO · Trade · Aug 28, 2025 · Filed · Sep 3, 2025 · filed 6 days after trade · Spero Therapeutics, Inc.
$3,339
1,695 sh
SPRO · Trade · Aug 28, 2025 · Filed · Sep 3, 2025 · filed 6 days after trade · Spero Therapeutics, Inc.
$12,947
6,572 sh