Latest Period
Q1 2026
Security Snapshot
Gossamer Bio, Inc. - Common Stock, $0.0001 par value (GOSS) Institutional Ownership
CUSIP: 38341P102
13F Institutional Holders and Ownership History from Q1 2019 to Q1 2026
Institutions Reporting
181
Shares (Excl. Options)
169,589,690
Price
$0.33
Save this security page for your next review
Keep this CUSIP in your watchlists so you can revisit quarter changes from one place. If you create an account from here, we will bring you back after verification.
- Security type / class
- Equity / Common Stock, $0.0001 par value
- Symbol
- GOSS on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 169,589,690
- Total 13F value
- $55,714,825
- Portfolio coverage rank
- 0%
- Share change
- -15,395,619
- Value change
- -$77,470,486
- Number of holders
- 181
- Shares outstanding
- 236,211,947
- SEC-reported price per share
- $0.34
- Insider filing price
- $0.34
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- GOSS - Gossamer Bio, Inc. - Common Stock, $0.0001 par value is tracked under CUSIP 38341P102.
- 181 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 195 to 181 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $573,488,877 to $55,714,825.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 181 institutions filings for Q1 2026.
Security key
38341P102
Latest holder period
Q1 2026
13F holders
181
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
GOSS full holder history
Gossamer Bio, Inc. SEC filings
Gossamer Bio, Inc. company facts
Gossamer Bio, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 38341P102:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
GOSS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 6.5% | +24% | $46,705,201 | +$9,084,437 | 15,065,708 | +24% | BlackRock, Inc. | 31 Dec 2025 |
| 683 Capital Management, LLC | 3.9% | -27% | $3,732,522 | -$1,200,000 | 9,331,304 | -24% | 683 Capital Management, LLC | 18 Mar 2026 |
| Octagon Capital Advisors LP | 3.8% | -39% | $3,590,422 | -$2,466,148 | 8,976,054 | -41% | Octagon Capital Advisors LP | 31 Mar 2026 |
| Invus Global Management, LLC | 2.8% | $5,507,814 | 6,258,880 | Invus Public Equities, L.P. | 31 Dec 2024 | |||
| Growth Equity Opportunities 18 VGE, LLC | 1.7% | $10,366,092 | 4,065,134 | Growth Equity Opportunities 18 VGE, LLC | 23 Feb 2026 |
As of 31 Mar 2026, 181 institutional investors reported holding 169,589,690 shares of Gossamer Bio, Inc. - Common Stock, $0.0001 par value (GOSS). This represents 72% of the company’s total 236,211,947 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
59%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 7.1% | 16,826,695 | -1.3% | 0% | $5,527,571 |
| Kalehua Capital Management LLC | 4.3% | 10,236,293 | 2.4% | $3,362,622 | |
| AQR CAPITAL MANAGEMENT LLC | 4.3% | 10,126,897 | +805% | 0% | $3,326,687 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4% | 9,394,593 | 0% | 0% | $3,090,821 |
| ARCH Venture Management, LLC | 3.4% | 8,055,916 | 0% | 0.39% | $2,646,368 |
| Octagon Capital Advisors LP | 3.3% | 7,750,000 | -44% | 0.28% | $2,545,875 |
| SAMSARA BIOCAPITAL, LLC | 3.1% | 7,222,559 | 0% | 0.23% | $2,372,611 |
| Balyasny Asset Management L.P. | 2.5% | 5,922,298 | +290% | 0% | $1,945,475 |
| ACADIAN ASSET MANAGEMENT LLC | 2.2% | 5,277,904 | +19% | 0% | $1,729,000 |
| Siren, L.L.C. | 2.2% | 5,208,968 | 0% | 0.05% | $1,711,146 |
| 683 Capital Management, LLC | 2.1% | 5,000,000 | -3.7% | 0.15% | $1,642,500 |
| HHLR ADVISORS, LTD. | 2.1% | 4,974,041 | 0% | 0.1% | $1,633,972 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1% | 4,939,691 | +1.4% | 0% | $1,623,125 |
| Qube Research & Technologies Ltd | 2.1% | 4,917,763 | +810% | 0% | $1,615,485 |
| TWO SIGMA INVESTMENTS, LP | 2% | 4,780,851 | +41% | 0% | $1,570,510 |
| STATE STREET CORP | 1.9% | 4,388,109 | -53% | 0% | $1,441,494 |
| Corient Private Wealth LLC | 1.7% | 3,985,383 | +3.6% | 0% | $1,309,199 |
| Squarepoint Ops LLC | 1.4% | 3,398,757 | +1434% | 0% | $1,116,492 |
| GSA CAPITAL PARTNERS LLP | 1.4% | 3,254,233 | +6175% | 0.07% | $1,069,000 |
| BANK OF AMERICA CORP /DE/ | 1.3% | 3,173,725 | +66% | 0% | $1,040,982 |
| BARCLAYS PLC | 1.3% | 3,065,806 | +432% | 0% | $1,007,118 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.91% | 2,161,079 | 0% | 0% | $710,995 |
| Alyeska Investment Group, L.P. | 0.87% | 2,051,442 | +126% | 0% | $673,899 |
| UBS Group AG | 0.8% | 1,883,583 | +6.3% | 0% | $619,699 |
| Ensign Peak Advisors, Inc | 0.72% | 1,702,125 | 0% | $559,148 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
29
Latest
Q1 2026
Rows shown
1-25 of 29
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 169,589,690 | $55,714,825 | -$77,470,486 | $0.33 | 181 |
| 2025 Q4 | 185,008,788 | $573,488,877 | +$17,712,101 | $3.10 | 195 |
| 2025 Q3 | 180,099,232 | $473,650,742 | +$14,481,997 | $2.63 | 162 |
| 2025 Q2 | 177,241,575 | $218,003,209 | +$9,779,866 | $1.23 | 123 |
| 2025 Q1 | 169,972,743 | $186,887,807 | -$1,268,144 | $1.10 | 118 |
| 2024 Q4 | 171,313,829 | $154,975,691 | -$4,643,111 | $0.90 | 102 |
| 2024 Q3 | 174,874,615 | $172,644,460 | -$19,949,532 | $0.99 | 99 |
| 2024 Q2 | 182,850,284 | $164,736,451 | -$20,026,799 | $0.90 | 93 |
| 2024 Q1 | 197,765,806 | $233,516,476 | -$11,193,563 | $1.18 | 105 |
| 2023 Q4 | 203,270,485 | $185,471,165 | +$4,883,709 | $0.91 | 96 |
| 2023 Q3 | 205,596,440 | $171,215,346 | +$117,834,337 | $0.83 | 93 |
| 2023 Q2 | 62,010,889 | $74,414,154 | -$19,164,753 | $1.20 | 94 |
| 2023 Q1 | 77,679,537 | $97,875,805 | -$40,109,226 | $1.26 | 107 |
| 2022 Q4 | 103,773,723 | $225,185,263 | -$165,052,760 | $2.17 | 117 |
| 2022 Q3 | 85,232,624 | $1,021,045,667 | +$262,239,455 | $11.98 | 154 |
| 2022 Q2 | 63,691,207 | $533,207,849 | +$32,485,845 | $8.37 | 126 |
| 2022 Q1 | 59,875,031 | $519,727,258 | +$5,179,881 | $8.68 | 138 |
| 2021 Q4 | 58,810,100 | $664,847,746 | +$43,218,257 | $11.31 | 129 |
| 2021 Q3 | 54,748,025 | $687,740,924 | +$24,001,097 | $12.57 | 123 |
| 2021 Q2 | 53,088,201 | $431,075,177 | -$10,198,257 | $8.12 | 109 |
| 2021 Q1 | 54,256,286 | $501,857,885 | +$8,880,956 | $9.25 | 121 |
| 2020 Q4 | 53,109,159 | $513,580,534 | -$47,148,476 | $9.67 | 119 |
| 2020 Q3 | 55,543,085 | $689,284,591 | +$37,297,727 | $12.41 | 122 |
| 2020 Q2 | 52,506,803 | $683,821,623 | +$177,437,307 | $13.00 | 108 |
| 2020 Q1 | 39,039,096 | $396,249,329 | -$15,719,655 | $10.15 | 95 |