Kamal Hamed - Jun 12, 2023 Form 4 Insider Report for Spero Therapeutics, Inc. (SPRO)

Role: Chief Medical Officer
Signature: /s/ Tamara Joseph. Attorney-in-Fact for Kamal Hamed
Stock symbol: SPRO
Transactions as of: Jun 12, 2023
Transactions value $: $0
Form type: 4
Date filed: 6/14/2023, 08:30 AM
Previous filing: Feb 3, 2023
Next filing: Sep 15, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SPRO	Common Stock	Award	$0	+140K	+29.41%	$0.00	616K	Jun 12, 2023	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	On August 4, 2022, the Reporting Person was granted a target of 140,000 performance-based restricted stock units ("RSUs") under the Issuer's 2019 Inducement Equity Incentive Plan, as amended. Each RSU represents the right, upon achievement of certain pre-established performance criteria, to receive one share of the Issuer's common stock, subject to vesting conditions. On June 12, 2023, the Board of Directors of the Issuer determined that 100% of the performance-based conditions were met resulting in 140,000 RSUs earned by the Reporting Person. The RSUs vest in two equal annual installments on September 12, 2023 and September 12, 2024, subject to the Reporting Person's continued service through the applicable vesting date.
F2	Consists of RSUs held by the Reporting Person.

Content

On August 4, 2022, the Reporting Person was granted a target of 140,000 performance-based restricted stock units ("RSUs") under the Issuer's 2019 Inducement Equity Incentive Plan, as amended. Each RSU represents the right, upon achievement of certain pre-established performance criteria, to receive one share of the Issuer's common stock, subject to vesting conditions. On June 12, 2023, the Board of Directors of the Issuer determined that 100% of the performance-based conditions were met resulting in 140,000 RSUs earned by the Reporting Person. The RSUs vest in two equal annual installments on September 12, 2023 and September 12, 2024, subject to the Reporting Person's continued service through the applicable vesting date.

Consists of RSUs held by the Reporting Person.