2 institutions reported holding $8,055 of UPSTREAM BIO INC COM (UPB) in SEC 13F filings for 2026-06-30. Largest institutional holders: GAMMA Investing LLC ($8,055), Versant Capital Management, Inc ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GAMMA Investing LLC | $8,055 | 1,164 | Added |
| 2 | Versant Capital Management, Inc | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30