Who Owns PHATHOM PHARMACEUTICALS INC (PHAT)? -- Institutional Holders (2026-06-30)
192 institutions reported holding $799.3M of PHATHOM PHARMACEUTICALS INC (PHAT) in SEC 13F filings for 2026-06-30. Largest institutional holders: Frazier Life Sciences Management, L.P. ($135.3M), Medicxi Ventures Management (Jersey) Ltd ($81.0M), BlackRock, Inc. ($49.1M), Invesco Ltd. ($43.7M), VANGUARD GROUP INC ($42.0M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | Frazier Life Sciences Management, L.P. | $135.3M | 12.5M | Hold |
| 2 | Medicxi Ventures Management (Jersey) Ltd | $81.0M | 7.5M | Hold |
| 3 | BlackRock, Inc. | $49.1M | 4.5M | Added |
| 4 | Invesco Ltd. | $43.7M | 4.0M | Trimmed |
| 5 | VANGUARD GROUP INC | $42.0M | 3.9M | Added |
| 6 | Carlyle Group Inc. | $37.9M | 3.5M | Hold |
| 7 | MILLENNIUM MANAGEMENT LLC | $36.6M | 3.4M | Trimmed |
| 8 | GW&K Investment Management, LLC | $23.5M | 2.2M | Added |
| 9 | FRANKLIN RESOURCES INC | $21.4M | 2.0M | Added |
| 10 | NEA Management Company, LLC | $21.3M | 2.0M | Hold |
| 11 | 683 Capital Management, LLC | $20.1M | 1.9M | Hold |
| 12 | GOLDMAN SACHS GROUP INC | $19.3M | 1.8M | Added |
| 13 | STATE STREET CORP | $17.2M | 1.6M | Added |
| 14 | Catalys Pacific, LLC | $16.2M | 1.5M | Hold |
| 15 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $15.9M | 1.5M | Added |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | $14.3M | 1.3M | Trimmed |
| 17 | WASATCH ADVISORS LP | $14.2M | 1.3M | Trimmed |
| 18 | Ensign Peak Advisors, Inc | $11.4M | 1.1M | Trimmed |
| 19 | Propel Bio Management, LLC | $11.4M | 1.1M | Added |
| 20 | Point72 Asset Management, L.P. | $11.1M | 1.0M | New |
| 21 | SummitTX Capital, L.P. | $8.6M | 789,550 | Trimmed |
| 22 | HSBC HOLDINGS PLC | $7.7M | 709,695 | New |
| 23 | CITADEL ADVISORS LLC | $7.6M | 696,801 | Trimmed |
| 24 | MARSHALL WACE, LLP | $7.2M | 666,090 | Trimmed |
| 25 | EcoR1 Capital, LLC | $6.8M | 625,000 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30