Who owns Gossamer Bio, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from SEC filings.
Institutional ownership of GOSS from SEC Form 13F filings across 118 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, 118 institutions disclosed 204.3M shares of Gossamer Bio, Inc. worth $33.1M — about 63.9% of shares outstanding; the largest disclosed holder is D. E. Shaw & Co., Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
118
13F holders
$33.1M
value, 2026 filers
63.9%
of shares outstanding (204.3M sh)
21
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 | VANGUARD CAPITAL MANAGEMENT LLC | 9.4M | $1.6M | 0.0% | 2.9% | -49.9% |
| 5 | BARCLAYS PLC | 7.8M | $1.3M | 0.0% | 2.4% | +155.5% |
| 6 | BlackRock, Inc. | 7.7M | $1.3M | 0.0% | 2.4% | -54.4% |
| 7 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIPNEW | 7.6M | $1.2M | 0.0% | 2.4% | new |
| 8 | TWO SIGMA INVESTMENTS, LP | 7.4M | $1.2M | 0.0% | 2.3% | +55.5% |
| 9 | Qube Research & Technologies Ltd | 7.1M | $1.2M | 0.0% | 2.2% | +43.7% |
| 10 | Corient Private Wealth LP | 5.6M | $925,959 | 0.0% | 1.8% | +41.2% |
| 11 | UBS Group AG | 3.1M | $510,474 | 0.0% | 1% | +64.2% |
| 12 | Squarepoint Ops LLC | 2.6M | $420,780 | 0.0% | 0.8% | -24.8% |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 2.5M | $408,706 | 0.0% | 0.8% | -49.8% |
| 14 | MILLENNIUM MANAGEMENT LLC | 2.4M | $395,473 | 0.0% | 0.8% | +1182.0% |
| 15 | MARSHALL WACE, LLPNEW | 2.1M | $338,399 | 0.0% | 0.7% | new |
| 16 | ACADIAN ASSET MANAGEMENT LLC | 1.8M | $293 | 0.0% | 0.6% | -66.0% |
| 17 | HSBC HOLDINGS PLC | 1.6M | $267,389 | 0.0% | 0.5% | +1289.4% |
| 18 | VANGUARD FIDUCIARY TRUST CO | 1.2M | $205,490 | 0.0% | 0.4% | -11.3% |
| 19 | JPMORGAN CHASE & CO | 1.2M | $201,495 | 0.0% | 0.4% | +1225.5% |
| 20 | GOLDMAN SACHS GROUP INC | 1.1M | $185,743 | 0.0% | 0.4% | -4.4% |
| 21 | DEUTSCHE BANK AG\ | 1.1M | $188,095 | 0.0% | 0.3% | -15.3% |
| 22 | Sixth Street Partners Management Company, L.P.NEW | 992,527 | $163,370 | 0.0% | 0.3% | new |
| 23 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 992,527 | $163,370 | 0.0% | 0.3% | -34.3% |
| 24 | SMITH, MOORE & CO. | 900,000 | $148,140 | 0.0% | 0.3% | +91.5% |
| 25 | Ishara Investments LP | 820,000 | $134,972 | 0.1% | 0.3% | 0.0% |
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.