Patrick V.J.J. Vink - Jan 5, 2022 Form 4 Insider Report for Spero Therapeutics, Inc. (SPRO)

Role: Director
Signature: /s/ Tamara Joseph, Attorney-in-Fact for Patrick V.J.J. Vink
Stock symbol: SPRO
Transactions as of: Jan 5, 2022
Transactions value $: $19,992
Form type: 4
Date filed: 1/7/2022, 04:07 PM
Previous filing: Aug 18, 2021
Next filing: Jun 16, 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	$20K	+2.21K		$9.03^*	2.21K	Jan 5, 2022	Common Stock	2.21K	$13.19	Direct	F1, F2

Showing 1 to 1 of 1 entries

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This stock option shall vest in four quarterly installments on the last day of each calendar quarter during the calendar year subject to the Reporting Person's continued service as a non-employee director.
F2	This stock option was issued to the Reporting Person, who elected to take stock options in lieu of $20,000 in cash compensation for services as a director, pursuant to the Issuer's non-employee director compensation policy.

Remarks:

Exhibit 24.1 - Power of Attorney