GSK plc

Holdings History for Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO)

Symbol: SPRO on Nasdaq
Investment type: Equity / Common Stock, par value $0.001 per share
Latest Disclosed Shares Owned: 9,190,606 shares
Security Ownership %: 16%

Shares, Excluding Options vs Price

Value, Excluding Options

GSK PLC ownership in Spero Therapeutics, Inc. Common Stock, par value $0.001 per share (SPRO)

28 Mar 2025 - GSK PLC has filed an SCHEDULE 13D/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 9,190,606 shares of Spero Therapeutics, Inc. Common Stock, par value $0.001 per share (SPRO). This represents 16% ownership of the company. This is the first filing by GSK plc disclosing ownership of Spero Therapeutics, Inc. Common Stock, par value $0.001 per share (SPRO).

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
GSK PLC	16%		$6,709,142	9,190,606			$0.73	13D/A	27 Mar 2025	28 Mar 2025, 16:30

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025		2.7%	0%	$21,414,112	9,190,606	0		$2.33	Q4 2025

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.