PHAT: PHATHOM PHARMACEUTICALS INC insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-07-29 | New 13G stake | BlackRock, Inc. | 5.50% | SEC |
Institutional ownership (Q2 2026)
161 institutions reported holding $756.61M of PHATHOM PHARMACEUTICALS INC on Form 13F (174 the quarter before). 20 opened a new position and 32 sold out. Shares held by institutions: +5%.
| Largest holders | Shares | Value |
|---|---|---|
| Frazier Life Sciences Management, L.P. | 12,466,489 | $135.26M |
| Medicxi Ventures Management (Jersey) Ltd | 7,464,572 | $80.99M |
| BlackRock, Inc. | 4,525,129 | $49.10M |
| Invesco Ltd. | 4,029,731 | $43.72M |
| Carlyle Group Inc. | 3,496,808 | $37.94M |
| MILLENNIUM MANAGEMENT LLC | 3,375,834 | $36.63M |
| VANGUARD CAPITAL MANAGEMENT LLC | 2,656,944 | $28.83M |
| FRANKLIN RESOURCES INC | 1,970,828 | $21.38M |
| NEA Management Company, LLC | 1,960,169 | $21.27M |
| 683 Capital Management, LLC | 1,850,000 | $20.07M |
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