Stocks · Health care · Pharmaceutical Preparations

Spero Therapeutics, Inc.

SPRO Clue Score50
United States Fiscal year ends December CIK 0001701108 Results filed 12 Aug 2026

What the insiders did Net buying

Nothing of that kind in this period.

What was left out

Form 4 filings counted 197
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 23
Sales on a Rule 10b5-1 plan 4
Sales straight out of an exercise 24
Sales at will 53
Transactions with no price 0
Shares from compensation/vesting 13,007,082
Sales filed before the plan box existed 18
History held since 7 Nov 2017