FRANK E. THOMAS - 17 Aug 2021 Form 4 Insider Report for Spero Therapeutics, Inc. (SPRO)

Role
Director
Signature
/s/ Matthew J. Gardella, as Attorney-in-Fact for Frank E. Thomas
Issuer symbol
SPRO
Transactions as of
17 Aug 2021
Net transactions value
$0
Form type
4
Filing time
18 Aug 2021, 16:55:51 UTC
Previous filing
17 May 2021
Next filing
07 Jan 2022
SEC
View on sec.gov

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction SPRO Stock Option (right to buy) Award $0 +7,500 $0.000000 7,500 17 Aug 2021 Common Stock 7,500 $13.69 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The shares underlying this option will vest and become exercisable in full on August 17, 2022 subject to the Reporting Person's continued service as a director through the vesting date.