Anson Funds Management LP

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: 1,615,469 shares
Security Ownership %: 2.9%

Shares, Excluding Options vs Price

Value, Excluding Options

Anson Funds Management LP ownership in Spero Therapeutics, Inc. Common Stock, par value $0.001 per share (SPRO)

14 Aug 2025 - Anson Funds Management LP has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,615,469 shares of Spero Therapeutics, Inc. Common Stock, par value $0.001 per share (SPRO). This represents 2.9% ownership of the company. This is the first filing by Anson Funds Management LP 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
Anson Funds Management LP	2.9%		$4,587,932	1,615,469			$2.84	13G/A	30 Jun 2025	14 Aug 2025, 21:48

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025	0.2%	-0.32%	$1,456,394	625,062	-978,507	-61%	$2.33	Q4 2025
30 Sep 2025	0.33%	-0%	$3,014,710	1,603,569	-11,900	-0.74%	$1.88	Q3 2025
30 Jun 2025	0.86%	-1.2%	$4,684,860	1,615,469	-2,183,463	-57%	$2.90	Q2 2025
31 Mar 2025	0.66%	-0.01%	$2,735,231	3,798,932	-40,954		$0.72	Q1 2025
31 Dec 2024	0.49%	+0.01%	$3,955,083	3,839,886	+89,436	+2.4%	$1.03	Q4 2024
30 Sep 2024	0.72%	0%	$5,025,603	3,750,450	0		$1.34	Q3 2024
30 Jun 2024	0.74%	0%	$4,875,585	3,750,450	0		$1.30	Q2 2024
31 Mar 2024	1.3%	-0.19%	$6,450,774	3,750,450	-547,249	-13%	$1.72	Q1 2024
31 Dec 2023	1.3%	+0.04%	$6,317,618	4,297,699	+138,127	+3.3%	$1.47	Q4 2023
30 Sep 2023	1.7%	+0.29%	$5,033,082	4,159,572	+714,710	+21%	$1.21	Q3 2023
30 Jun 2023	1.5%	+0.04%	$4,995,050	3,444,862	+100,000	+3%	$1.45	Q2 2023
31 Mar 2023	1.6%	+0.15%	$4,850,050	3,344,862	+325,254	+11%	$1.45	Q1 2023
31 Dec 2022	1.7%	+0.87%	$5,223,922	3,019,608	+1,545,736	+105%	$1.73	Q4 2022
30 Sep 2022	0.58%	+0.58%	$2,948,000	1,473,872	+1,473,872	NEW	$2.00	Q3 2022

* 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.