Cynthia Smith - 12 Jun 2025 Form 4 Insider Report for Spero Therapeutics, Inc. (SPRO)

Role
Director
Signature
/s/ Maegan Deare, Attorney-in-Fact for Cynthia Smith
Issuer symbol
SPRO
Transactions as of
12 Jun 2025
Transactions value $
$0
Form type
4
Filing time
16 Jun 2025, 20:24:42 UTC
Previous filing
11 Jun 2025
Next filing
23 Jun 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Smith Cynthia Director C/O SPERO THERAPEUTICS, INC., 675 MASSACHUSETTS AVENUE, 14TH FLOOR, CAMBRIDGE /s/ Maegan Deare, Attorney-in-Fact for Cynthia Smith 12 Jun 2025 0001609480

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SPRO Common Stock Award $0 +20,000 +36% $0 75,000 12 Jun 2025 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Consists of restricted stock units ("RSUs"). Each RSU represents the right to receive one share of common stock upon vesting. The RSUs vest on June 12, 2026, subject to the Reporting Person's continued service through the applicable vesting date.