Gossamer Bio, Inc. - Common Stock (GOSS)

Historical Holders from Q1 2019 to Q3 2025

Symbol: GOSS on Nasdaq
Type / Class: Equity / Common Stock
Shares outstanding: 227,306,614
All holders as of 30 Sep 2025: Q3 2025
Total 13F shares, excl. options: 180,099,073
Holdings value: $473,650,324
% of all portfolios: 0%
Number of holders: 161
Number of buys: 101
Number of sells: -59
Average buys %: +0%
Average sells %: -0%

Reported Shares, Excluding Options vs Price

Reported Value, Excluding Options

Total Investors

Significant Owners of Gossamer Bio, Inc. - Common Stock (GOSS)

Filer	Ownership	Change %	Holdings Value	Net Change	Nb Shares	Change %	Reporting Name	Report Period
Octagon Capital Advisors LP	8.6%		$17,226,928		19,576,054		Octagon Capital Advisors LP	31 Dec 2024
BlackRock, Inc.	5.3%		$14,926,467		12,135,339		BlackRock, Inc.	30 Jun 2025
VANGUARD GROUP INC	5.02%	+15%	$14,035,274	+$1,693,271	11,410,792	+14%	The Vanguard Group	30 Jun 2025
Invus Global Management, LLC	2.8%		$5,507,814		6,258,880		Invus Public Equities, L.P.	31 Dec 2024

Institutional Holders of Gossamer Bio, Inc. - Common Stock (GOSS)

Period	Reported Shares, Excl. Options	Value, Excl. Options	Value Change	Puts Notional Value	Calls Notional Value	Price	Investors
2025 Q3	180,099,073	$473,650,324	+$14,481,579	$553,615	$21,277,718	$2.63	161
2025 Q2	177,241,575	$218,003,209	+$9,779,866	$160,146	$3,523,721	$1.23	123
2025 Q1	169,972,743	$186,887,807	-$1,268,144	$63,580	$2,323,215	$1.1	118
2024 Q4	171,313,829	$154,975,691	-$4,643,111	$501,603	$735,729	$0.9046	102
2024 Q3	174,874,615	$172,644,460	-$19,949,532	$513,820	$423,378	$0.9864	99
2024 Q2	182,850,284	$164,736,451	-$20,026,799	$488,842	$408,109	$0.9009	93
2024 Q1	197,765,806	$233,516,476	-$11,193,563	$578,318	$477,428	$1.18	105
2023 Q4	203,270,485	$185,471,165	+$4,883,709	$589,694	$366,954	$0.9125	96
2023 Q3	205,596,440	$171,215,346	+$117,834,337	$297,655	$207,689	$0.8328	93
2023 Q2	62,010,889	$74,414,154	-$19,164,753	$578,340	$131,664	$1.2	94
2023 Q1	77,679,537	$97,875,805	-$40,109,226	$557,172	$246,708	$1.26	107
2022 Q4	103,773,723	$225,185,263	-$165,052,760	$449,407	$634,074	$2.17	117
2022 Q3	85,232,624	$1,021,045,667	+$262,239,455	$4,252,800	$15,871,590	$11.98	154
2022 Q2	63,691,207	$533,207,849	+$32,485,845	$372,000	$10,092,000	$8.37	126
2022 Q1	59,875,031	$519,727,258	+$5,179,881	$4,760,000	$12,744,000	$8.68	138
2021 Q4	58,810,100	$664,847,746	+$43,218,257	$4,932,000	$3,455,000	$11.31	129
2021 Q3	54,748,025	$687,740,924	+$24,001,097	$5,349,000	$4,093,000	$12.57	123
2021 Q2	53,088,201	$431,075,177	-$10,198,257	$3,024,000	$368,000	$8.12	109
2021 Q1	54,256,286	$501,857,885	+$8,880,956	$3,709,000	$3,552,000	$9.25	121
2020 Q4	53,109,159	$513,580,534	-$47,148,476	$1,677,000	$5,553,000	$9.67	119
2020 Q3	55,543,085	$689,284,591	+$37,297,727	$2,682,000	$4,429,000	$12.41	122
2020 Q2	52,506,803	$683,821,623	+$177,437,307	$378,000	$1,572,000	$13	108
2020 Q1	39,039,096	$396,249,329	-$15,719,655	$1,811,000	$1,036,000	$10.15	95
2019 Q4	40,415,352	$631,689,853	-$16,734,787	$14,177,000	$1,064,000	$15.63	86
2019 Q3	41,336,618	$693,682,039	+$153,760,437	$11,624,000	$17,864,000	$16.79	78
2019 Q2	36,689,307	$812,845,961	+$18,784,299			$22.18	74
2019 Q1	35,897,641	$776,340,000	+$776,340,189			$21.67	71