Gossamer Bio, Inc.

Historical 13F Holders

Symbol
GOSS
CUSIP
38341P102
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 38341P102 since 12/18/2024, largest first.

Filer % of Class Filed
683 Capital Management, LLC 13G
10.0% 6/11/2026
Event 6/4/2026
Context Capital Management, LLC 13G
9.9% 6/9/2026
Event 6/4/2026
DeepCurrents Investment Group LLC 13G
7.7% 6/11/2026
Event 6/4/2026
D. E. Shaw & Co., L.P. 13D/A
6.0% 8/24/2026
Event 8/20/2026
Opaleye Management Inc. 13G
5.1% 7/29/2026
Event 7/22/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (5)
Octagon Capital Advisors LP 13G/A
3.8% 5/14/2026
Event 3/31/2026
Invus Global Management, LLC 13G/A
2.8% 2/12/2025
Event 12/31/2024
Growth Equity Opportunities 18 VGE, LLC 13D/A
1.7% 2/24/2026
Event 2/23/2026
BlackRock, Inc. 13G/A 1.0% 7/29/2026
Event 6/30/2026
Vanguard Group Inc 13G/A 0% 3/27/2026
Event 3/13/2026

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 1 98.0 $14.00
2026 Q2 178 382 M $62.7 M
2026 Q1 201 177 M $58.8 M
2025 Q4 220 189 M $585 M
2025 Q3 181 180 M $474 M
2025 Q2 137 177 M $218 M
2025 Q1 127 170 M $187 M
2024 Q4 120 172 M $156 M
2024 Q3 112 175 M $173 M
2024 Q2 106 184 M $166 M
2024 Q1 119 207 M $244 M
2023 Q4 109 218 M $200 M
2023 Q3 106 206 M $171 M
2023 Q2 113 62.0 M $74.7 M
2023 Q1 119 77.7 M $97.9 M
2022 Q4 133 132 M $286 M
2022 Q3 188 85.3 M $1.02 B
2022 Q2 146 63.7 M $533 M
2022 Q1 153 59.9 M $520 M
2021 Q4 146 59.0 M $667 M
2021 Q3 135 54.7 M $688 M
2021 Q2 124 53.1 M $433 M
2021 Q1 131 54.3 M $502 M
2020 Q4 136 53.4 M $517 M
2020 Q3 137 55.5 M $689 M
2020 Q2 118 52.5 M $684 M
2020 Q1 110 40.4 M $410 M
2019 Q4 102 40.9 M $640 M
2019 Q3 92 41.3 M $694 M
2019 Q2 75 36.7 M $813 M
2019 Q1 73 35.9 M $776 M