4 institutions reported holding $22.7M of Tango Therapeutics Inc. (TNGX) in SEC 13F filings for 2026-06-30. Largest institutional holders: CONGRESS ASSET MANAGEMENT CO ($11.9M), Assenagon Asset Management S.A. ($10.8M), GAMMA Investing LLC ($26,977), MassMutual Private Wealth & Trust, FSB ($250). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | CONGRESS ASSET MANAGEMENT CO | $11.9M | 380,746 | Added |
| 2 | Assenagon Asset Management S.A. | $10.8M | 345,156 | New |
| 3 | GAMMA Investing LLC | $26,977 | 863 | Added |
| 4 | MassMutual Private Wealth & Trust, FSB | $250 | 8 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30