Who owns Gossamer Bio, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of GOSS from SEC Form 13F filings across 170 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 170 institutions disclosed 370.6M shares of Gossamer Bio, Inc. worth $60.8M — about 115.8% of shares outstanding; the largest disclosed holder is D. E. Shaw & Co., Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
170
13F holders
$60.8M
value, 2026 filers
115.8%
of shares outstanding (370.6M sh)
31
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of GOSS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | D. E. Shaw & Co., Inc. | 41.0M | $6.7M | 0.0% | 12.8% | +10417.7% |
| 2 | 683 Capital Management, LLC | 39.2M | $6.5M | 0.3% | 12.2% | +684.0% |
| 3 | DeepCurrents Investment Group LLCNEW | 37.7M | $6.0M | 0.2% | 11.8% | new |
| 4 | Context Capital Management, LLCNEW | 28.9M | $4.8M | 0.1% | 9% | new |
| 5 | Worth Venture Partners, LLCNEW | 25.0M | $4.1M | 9.3% | 7.8% | new |
| 6 | AQR CAPITAL MANAGEMENT LLC | 15.6M | $2.6M | 0.0% | 4.9% | +54.3% |
| 7 | GSA CAPITAL PARTNERS LLP | 15.0M | $2.5M | 0.2% | 4.7% | +360.5% |
| 8 | WOLVERINE ASSET MANAGEMENT LLCNEW | 12.9M | $2.1M | 0.0% | 4% | new |
| 9 | RENAISSANCE TECHNOLOGIES LLC | 11.6M | $1.9M | 0.0% | 3.6% | +854.9% |
| 10 | Kalehua Capital Management LLC | 11.1M | $1.8M | 1.3% | 3.5% | +49.2% |
| 11 | VANGUARD CAPITAL MANAGEMENT LLC | 9.4M | $1.6M | 0.0% | 2.9% | +0.2% |
| 12 | ARCH Venture Management, LLC | 8.1M | $1.3M | 0.1% | 2.5% | 0.0% |
| 13 | BARCLAYS PLC | 7.8M | $1.3M | 0.0% | 2.4% | +155.5% |
| 14 | Octagon Capital Advisors LP | 7.8M | $1.3M | 0.1% | 2.4% | 0.0% |
| 15 | BlackRock, Inc. | 7.7M | $1.3M | 0.0% | 2.4% | -54.4% |
| 16 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIPNEW | 7.6M | $1.2M | 0.0% | 2.4% | new |
| 17 | TWO SIGMA INVESTMENTS, LP | 7.4M | $1.2M | 0.0% | 2.3% | +55.5% |
| 18 | SAMSARA BIOCAPITAL, LLC | 7.2M | $1.2M | 0.1% | 2.3% | 0.0% |
| 19 | Qube Research & Technologies Ltd | 7.1M | $1.2M | 0.0% | 2.2% | +43.7% |
| 20 | Corient Private Wealth LP | 5.6M | $927,142 | 0.0% | 1.8% | +41.3% |
| 21 | Siren, L.L.C. | 5.2M | $857,396 | 0.0% | 1.6% | 0.0% |
| 22 | HHLR ADVISORS, LTD. | 5.0M | $818,727 | 0.1% | 1.6% | 0.0% |
| 23 | UBS Group AG | 3.1M | $510,474 | 0.0% | 1% | +64.2% |
| 24 | Squarepoint Ops LLC | 2.6M | $420,780 | 0.0% | 0.8% | -24.8% |
| 25 | GEODE CAPITAL MANAGEMENT, LLC | 2.5M | $408,706 | 0.0% | 0.8% | -49.8% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.