683 Capital Management, LLC

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: 12,331,304 shares
Security Ownership %: 5.2%

Shares, Excluding Options vs Price

Value, Excluding Options

683 Capital Management, LLC ownership in Gossamer Bio, Inc. Common Stock, $0.0001 par value per share (GOSS)

02 Mar 2026 - 683 Capital Management, LLC has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 12,331,304 shares of Gossamer Bio, Inc. Common Stock, $0.0001 par value per share (GOSS). This represents 5.2% ownership of the company. This is the first filing by 683 Capital Management, LLC disclosing ownership of Gossamer Bio, Inc. Common Stock, $0.0001 par value per share (GOSS).

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
683 Capital Management, LLC	5.2%		$31,444,825	12,331,304			$2.55	13G	23 Feb 2026	02 Mar 2026, 11:57

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025		1.3%	+0.03%	$16,091,480	5,190,800	+131,600	+2.6%	$3.10	Q4 2025
31 Dec 2025	call	0.08%	0%	$930,310	300,100	0		$3.10	Q4 2025
30 Sep 2025		1.2%	-0.31%	$13,305,696	5,059,200	-1,280,800	-20%	$2.63	Q3 2025
30 Sep 2025	call	0.1%	0%	$789,263	300,100	0		$2.63	Q3 2025
30 Jun 2025		0.79%	+0.03%	$7,798,200	6,340,000	+240,000	+3.9%	$1.23	Q2 2025
30 Jun 2025	call	0.07%	+0.07%	$369,123	300,100	+300,100	NEW	$1.23	Q2 2025
31 Mar 2025		0.68%	-0.1%	$6,710,000	6,100,000	-875,000		$1.10	Q1 2025
31 Dec 2024		0.62%	+0.1%	$6,309,585	6,975,000	+1,175,000	+20%	$0.90	Q4 2024
30 Sep 2024		0.58%	+0.01%	$5,721,120	5,800,000	+50,000	+0.87%	$0.99	Q3 2024
30 Jun 2024		0.54%	+0.23%	$5,180,175	5,750,000	+2,500,000	+77%	$0.90	Q2 2024
31 Mar 2024		0.39%	-0.01%	$3,835,000	3,250,000	-64,700	-2%	$1.18	Q1 2024
31 Dec 2023		0.3%	+0.15%	$3,024,664	3,314,700	+1,588,561	+92%	$0.91	Q4 2023
30 Sep 2023		0.15%	+0.15%	$1,437,529	1,726,139	+1,726,139	NEW	$0.83	Q3 2023

* 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.