Octagon Capital Advisors LP

Holdings History for Gossamer Bio, Inc. - Common Stock, $0.0001 par value per share (GOSS)

Symbol: GOSS on Nasdaq
Investment type: Equity / Common Stock, $0.0001 par value per share
Latest Disclosed Shares Owned: 15,141,425 shares
Security Ownership %: 6.5%

Shares, Excluding Options vs Price

Value, Excluding Options

Octagon Capital Advisors LP ownership in Gossamer Bio, Inc. Common Stock, $0.0001 par value per share (GOSS)

17 Feb 2026 - Octagon Capital Advisors LP has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 15,141,425 shares of Gossamer Bio, Inc. Common Stock, $0.0001 par value per share (GOSS). This represents 6.5% ownership of the company. In their previous filing dated 05 Feb 2025, Octagon Capital Advisors LP had reported owning 19,576,054 shares, indicating a decrease of +23%. .

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
Octagon Capital Advisors LP	6.5%	-23%	$46,938,418	15,141,425	-4,434,629	-23%	$3.10	13G/A	31 Dec 2025	17 Feb 2026, 16:02
Octagon Capital Advisors LP	8.6%		$17,226,928	19,576,054			$0.88	13G	31 Dec 2024	05 Feb 2025, 18:28

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025	5.4%	-1.2%	$43,137,650	13,915,371	-3,134,629	-18%	$3.10	Q4 2025
30 Sep 2025	7%	-0.53%	$44,841,500	17,050,000	-1,300,000	-7.1%	$2.63	Q3 2025
30 Jun 2025	5%	0%	$22,570,500	18,350,000	0		$1.23	Q2 2025
31 Mar 2025	4.4%	0%	$20,185,000	18,350,000	0		$1.10	Q1 2025
31 Dec 2024	2.8%	+1.4%	$16,599,410	18,350,000	+9,162,117	+100%	$0.90	Q4 2024
30 Sep 2024	1.5%	0%	$9,062,928	9,187,883	0		$0.99	Q3 2024
30 Jun 2024	1.4%	0%	$8,277,364	9,187,883	0		$0.90	Q2 2024
31 Mar 2024	1.3%	0%	$10,841,702	9,187,883	0		$1.18	Q1 2024
31 Dec 2023	1.3%	+0.15%	$8,383,943	9,187,883	+1,000,000	+12%	$0.91	Q4 2023
30 Sep 2023	1.2%	+0.62%	$6,818,869	8,187,883	+4,229,814	+107%	$0.83	Q3 2023
30 Jun 2023	0.66%	+0.33%	$4,749,683	3,958,069	+2,000,000	+102%	$1.20	Q2 2023
31 Mar 2023	0.36%	0%	$2,467,167	1,958,069	0		$1.26	Q1 2023
31 Dec 2022	0.66%	-0.03%	$4,249,010	1,958,069	-87,373	-4.3%	$2.17	Q4 2022
30 Sep 2022	4.2%	-1.5%	$24,504,000	2,045,442	-712,627	-26%	$11.98	Q3 2022
30 Jun 2022	6.2%	+0.44%	$23,085,000	2,758,069	+194,931	+7.6%	$8.37	Q2 2022
31 Mar 2022	4.8%	+2%	$22,248,000	2,563,138	+1,050,000	+69%	$8.68	Q1 2022
31 Dec 2021	3.3%	0%	$17,114,000	1,513,138	0		$11.31	Q4 2021
30 Sep 2021	4.7%	+0.31%	$19,020,000	1,513,138	+100,000	+7.1%	$12.57	Q3 2021
30 Jun 2021	2.4%	0%	$11,475,000	1,413,138	0		$8.12	Q2 2021
31 Mar 2021	4.9%	-0.52%	$13,072,000	1,413,138	-150,000	-9.6%	$9.25	Q1 2021
31 Dec 2020	5.2%	0%	$15,116,000	1,563,138	0		$9.67	Q4 2020

* 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.