# GOSSAMER BIO INC COM

GOSSAMER BIO INC COM is a security (CUSIP 38341P102) tracked across SEC portfolio filings. 197 institutional managers reported $97.0M on Form 13F as of 2026-06-30; 9 registered fund positions totaling $1.2M via N-PORT as of 2026-05-31.

## Summary

- Issuer: GOSSAMER BIO INC
- Class: COM
- CUSIP: 38341P102
- Asset category: EC
- 13F holders: 197
- 13F value: $97.0M
- 13F period: 2026-06-30
- N-PORT fund positions: 9
- N-PORT value: $1.2M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 197 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $39.9M | 12,873,209 |
| BlackRock, Inc. | New York, NY | $5.5M | 16,826,695 |
| Context Capital Management, LLC | LAJOLLA, CA | $4.8M | 28,946,459 |
| [Kalehua Capital Management LLC](https://search.stillhousedata.com/firm/325290) | DALLAS, TX | $3.4M | 10,236,293 |
| [AQR CAPITAL MANAGEMENT LLC](https://search.stillhousedata.com/firm/111883) | Greenwich, CT | $3.3M | 10,126,897 |
| [ARCH Venture Management, LLC](https://search.stillhousedata.com/firm/158196) | CHICAGO, IL | $2.6M | 8,055,916 |
| [Octagon Capital Advisors LP](https://search.stillhousedata.com/firm/306424) | NEW YORK, NY | $2.5M | 7,750,000 |
| [Samsara BioCapital, LLC](https://search.stillhousedata.com/firm/288114) | Palo Alto, CA | $2.4M | 7,222,559 |
| Hennion & Walsh Asset Management, Inc. | Parsippany, NJ | $2.0M | 652,977 |
| [Balyasny Asset Management L.P.](https://search.stillhousedata.com/firm/138111) | Chicago, IL | $1.9M | 5,922,298 |
| Siren, L.L.C. | New York, NY | $1.7M | 5,208,968 |
| [683 Capital Management, LLC](https://search.stillhousedata.com/firm/156181) | NEW YORK, NY | $1.6M | 5,000,000 |
| [HHLR ADVISORS, LTD.](https://search.stillhousedata.com/firm/166112) | Grand Cayman, E9 | $1.6M | 4,974,041 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $1.6M | 4,939,691 |
| [Qube Research & Technologies Ltd](https://search.stillhousedata.com/firm/304552) | LONDON, X0 | $1.6M | 4,917,763 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $740K | 0.09% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $226K | 0.13% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $108K | 0.22% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $41K | 0.01% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $35K | 0.01% |
| BlackRock Health Sciences Term Trust | BlackRock Health Sciences Term Trust | $20K | 0.20% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $14K | 0.04% |
| BlackRock Health Sciences Trust | BlackRock Health Sciences Trust | $10K | 0.20% |
| [DWS Small Cap Index VIP](https://search.stillhousedata.com/fund/S000006223) | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $9K | 0.21% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/38341P102.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.