# GOSSAMER BIO INC (GOSS)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/GOSS/

- Reporting holders: 175
- Reported value: $64.5M
- Shares held by institutions: 390,087,898 of 488,846,722 outstanding
- Held through calls: 0.7%
- Held through puts: 0.1%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [D. E. Shaw & Co., Inc.](https://holderbook.com/funds/1009207-d-e-shaw-co-inc/) | $6.7M | 40,959,285 | 0.0% | 5 |
| [683 Capital Management, LLC](https://holderbook.com/funds/1404574-683-capital-management-llc/) | $6.5M | 39,198,868 | 0.3% | 12 |
| [DeepCurrents Investment Group LLC](https://holderbook.com/funds/1754535-deepcurrents-investment-group-llc/) | $6.0M | 37,665,073 | 0.2% | 1 |
| [Context Capital Management, LLC](https://holderbook.com/funds/1301396-context-capital-management-llc/) | $4.8M | 28,946,459 | 0.1% | 1 |
| [Worth Venture Partners, LLC](https://holderbook.com/funds/1696778-worth-venture-partners-llc/) | $4.1M | 25,017,881 | 9.3% | 1 |
| [Kalehua Capital Management LLC](https://holderbook.com/funds/2106181-kalehua-capital-management-llc/) | $3.7M | 22,298,726 | 1.2% | 2 |
| [AQR CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/1167557-aqr-capital-management-llc/) | $2.6M | 15,629,993 | 0.0% | 4 |
| [GSA CAPITAL PARTNERS LLP](https://holderbook.com/funds/1362033-gsa-capital-partners-llp/) | $2.5M | 14,986,947 | 0.2% | 8 |
| [WOLVERINE ASSET MANAGEMENT LLC](https://holderbook.com/funds/1279891-wolverine-asset-management-llc/) | $2.1M | 12,894,746 | 0.0% | 2 |
| [RENAISSANCE TECHNOLOGIES LLC](https://holderbook.com/funds/1037389-renaissance-technologies-llc/) | $1.9M | 11,629,896 | 0.0% | 11 |
| [Corient Private Wealth LP](https://holderbook.com/funds/1948780-corient-private-wealth-lp/) | $1.9M | 11,251,018 | 0.0% | 15 |
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $1.6M | 9,416,023 | 0.0% | 2 |
| [ARCH Venture Management, LLC](https://holderbook.com/funds/1274403-arch-venture-management-llc/) | $1.3M | 8,055,916 | 0.1% | 12 |
| [BARCLAYS PLC](https://holderbook.com/funds/312069-barclays-plc/) | $1.3M | 7,832,522 | 0.0% | 17 |
| [Octagon Capital Advisors LP](https://holderbook.com/funds/1839435-octagon-capital-advisors-lp/) | $1.3M | 7,750,000 | 0.1% | 23 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $1.3M | 7,669,943 | 0.0% | 8 |
| [ARROWSTREET CAPITAL, LIMITED PARTNERSHIP](https://holderbook.com/funds/1164508-arrowstreet-capital-limited-partnership/) | $1.2M | 7,573,388 | 0.0% | 1 |
| [TWO SIGMA INVESTMENTS, LP](https://holderbook.com/funds/1179392-two-sigma-investments-lp/) | $1.2M | 7,432,001 | 0.0% | 26 |
| [SAMSARA BIOCAPITAL, LLC](https://holderbook.com/funds/1744967-samsara-biocapital-llc/) | $1.2M | 7,222,559 | 0.1% | 12 |
| [Qube Research & Technologies Ltd](https://holderbook.com/funds/1729829-qube-research-technologies-ltd/) | $1.2M | 7,065,756 | 0.0% | 11 |
| [Siren, L.L.C.](https://holderbook.com/funds/2005245-siren-l-l-c/) | $857.4K | 5,208,968 | 0.0% | 8 |
| [HHLR ADVISORS, LTD.](https://holderbook.com/funds/1762304-hhlr-advisors-ltd/) | $818.7K | 4,974,041 | 0.1% | 30 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $510.5K | 3,093,785 | 0.0% | 24 |
| [Squarepoint Ops LLC](https://holderbook.com/funds/1642575-squarepoint-ops-llc/) | $420.8K | 2,556,378 | 0.0% | 3 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $408.7K | 2,481,605 | 0.0% | 30 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 175 | $64.5M |
| Q1 2026 | 192 | $60.8M |
| Q4 2025 | 204 | $622.6M |
| Q3 2025 | 171 | $501.7M |
| Q2 2025 | 129 | $222.7M |
| Q1 2025 | 122 | $574.6M |
| Q4 2024 | 104 | $157.2M |
| Q3 2024 | 101 | $174.7M |
| Q2 2024 | 95 | $166.7M |
| Q1 2024 | 109 | $245.5M |
| Q4 2023 | 100 | $201.9M |
| Q3 2023 | 98 | $174.6M |