Latest Period
Q4 2025
Security Snapshot
Gossamer Bio, Inc. - Common Stock (GOSS) Institutional Ownership
CUSIP: 38341P102
13F Institutional Holders and Ownership History from Q1 2019 to Q1 2026
Institutions Reporting
194
Shares (Excl. Options)
185,006,357
Price
$3.10
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.
- Type / Class
- Equity / Common Stock
- Symbol
- GOSS on Nasdaq
- Shares outstanding
- 239,264,205
- Price per share
- $0.40
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 185,006,357
- Total reported value
- $573,481,341
- % of total 13F portfolios
- 0%
- Share change
- +5,001,775
- Value change
- +$17,709,144
- Number of holders
- 194
- Price from insider filings
- $0.40
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- GOSS - Gossamer Bio, Inc. - Common Stock is tracked under CUSIP 38341P102.
- 194 institutions reported positions in Q4 2025.
- 5 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 194 to 50 between Q4 2025 and Q1 2026.
- Reported value moved from $573,481,341 to $2,487,221.
Why This Matters
- 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.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 194 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 38341P102?
CUSIP 38341P102 identifies GOSS - Gossamer Bio, Inc. - Common Stock in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 38341P102:
Significant Owners of Gossamer Bio, Inc. - Common Stock (GOSS) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Octagon Capital Advisors LP | 6.5% | -23% | $46,938,418 | -$13,747,350 | 15,141,425 | -23% | Octagon Capital Advisors LP | 31 Dec 2025 |
| 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 |
| 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 Dec 2025, 194 institutional investors reported holding 185,006,357 shares of Gossamer Bio, Inc. - Common Stock (GOSS). This represents 77% of the company’s total 239,264,205 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of Gossamer Bio, Inc. - Common Stock (GOSS) together control 63% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| NEA Management Company, LLC | 7.6% | 18,093,034 | 0% | 2.9% | $56,088,405 |
| BlackRock, Inc. | 7.1% | 17,056,878 | +23% | 0% | $52,876,322 |
| Octagon Capital Advisors LP | 5.8% | 13,915,371 | -18% | 5.4% | $43,137,650 |
| VANGUARD GROUP INC | 5.4% | 12,873,209 | +7.2% | 0% | $39,906,948 |
| STATE STREET CORP | 3.9% | 9,310,969 | +140% | 0% | $28,864,004 |
| ARCH Venture Management, LLC | 3.4% | 8,055,916 | 0% | 3.8% | $24,973,340 |
| SAMSARA BIOCAPITAL, LLC | 3% | 7,222,559 | +18% | 2.3% | $22,389,933 |
| Siren, L.L.C. | 2.2% | 5,208,968 | 0% | 0.48% | $16,147,801 |
| 683 Capital Management, LLC | 2.2% | 5,190,800 | +2.6% | 1.3% | $16,091,480 |
| HHLR ADVISORS, LTD. | 2.1% | 4,974,041 | 0% | 0.5% | $15,419,527 |
| GEODE CAPITAL MANAGEMENT, LLC | 2% | 4,872,714 | +3.9% | 0% | $15,109,345 |
| Palo Alto Investors LP | 1.9% | 4,471,592 | -18% | 1.9% | $13,861,935 |
| ACADIAN ASSET MANAGEMENT LLC | 1.8% | 4,416,903 | -12% | 0.02% | $13,687,000 |
| FMR LLC | 1.8% | 4,237,590 | +3.7% | 0% | $13,136,529 |
| Corient Private Wealth LLC | 1.6% | 3,845,885 | +19124% | 0.02% | $11,922,244 |
| MILLENNIUM MANAGEMENT LLC | 1.5% | 3,584,288 | -0.97% | 0.01% | $11,111,293 |
| TWO SIGMA INVESTMENTS, LP | 1.4% | 3,397,110 | +49% | 0.02% | $10,531,041 |
| Rock Springs Capital Management LP | 1.4% | 3,266,960 | 0% | 0.52% | $10,127,576 |
| PERCEPTIVE ADVISORS LLC | 1.3% | 3,139,669 | -18% | 0.18% | $9,732,974 |
| Opaleye Management Inc. | 1.1% | 2,720,000 | -0.18% | 1.1% | $8,432,000 |
| TWO SIGMA ADVISERS, LP | 1.1% | 2,596,900 | +39% | 0.02% | $8,050,390 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 0.91% | 2,178,033 | +55% | 0.03% | $6,751,902 |
| SILVERARC CAPITAL MANAGEMENT, LLC | 0.89% | 2,135,722 | -55% | 0.96% | $6,620,738 |
| BANK OF AMERICA CORP /DE/ | 0.8% | 1,906,669 | -34% | 0% | $5,910,674 |
| GOLDMAN SACHS GROUP INC | 0.75% | 1,792,114 | +498% | 0% | $5,555,554 |
Institutional Holders of Gossamer Bio, Inc. - Common Stock (GOSS) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 7,552,128 | $2,487,221 | -$596,206 | $0.33 | 50 |
| 2025 Q4 | 185,006,357 | $573,481,341 | +$17,709,144 | $3.10 | 194 |
| 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 |
| 2019 Q4 | 40,415,352 | $631,689,853 | -$16,734,787 | $15.63 | 86 |
| 2019 Q3 | 41,336,618 | $693,682,039 | +$153,760,437 | $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 |