Who owns Phathom Pharmaceuticals, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of PHAT from SEC Form 13F filings across 160 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 160 institutions disclosed 71.3M shares of Phathom Pharmaceuticals, Inc. worth $773.5M — about 85.1% of shares outstanding; the largest disclosed holder is Frazier Life Sciences Management, L.P.. Source: SEC Form 13F filings, parsed by EvidInvest.
160
13F holders
$773.5M
value, 2026 filers
85.1%
of shares outstanding (71.3M sh)
21
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of PHAT's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Frazier Life Sciences Management, L.P. | 12.5M | $135.3M | 2.9% | 14.9% | 0.0% |
| 2 | Medicxi Ventures Management (Jersey) Ltd | 7.5M | $81.0M | 45.6% | 8.9% | 0.0% |
| 3 | BlackRock, Inc. | 4.5M | $49.1M | 0.0% | 5.4% | +11.4% |
| 4 | Invesco Ltd. | 4.0M | $43.7M | 0.0% | 4.8% | -6.8% |
| 5 | Carlyle Group Inc. | 3.5M | $37.9M | 0.4% | 4.2% | 0.0% |
| 6 | MILLENNIUM MANAGEMENT LLC | 3.4M | $36.6M | 0.0% | 4% | -16.1% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 2.7M | $28.8M | 0.0% | 3.2% | +2.8% |
| 8 | GW&K Investment Management, LLC | 2.2M | $23.5M | 0.2% | 2.6% | +52.5% |
| 9 | FRANKLIN RESOURCES INC | 2.0M | $21.4M | 0.0% | 2.4% | +98.2% |
| 10 | NEA Management Company, LLC | 2.0M | $21.3M | 1.3% | 2.3% | 0.0% |
| 11 | 683 Capital Management, LLC | 1.9M | $20.1M | 1.0% | 2.2% | 0.0% |
| 12 | GOLDMAN SACHS GROUP INC | 1.8M | $19.3M | 0.0% | 2.1% | +183.9% |
| 13 | STATE STREET CORP | 1.6M | $17.2M | 0.0% | 1.9% | +14.4% |
| 14 | Catalys Pacific, LLC | 1.5M | $16.2M | 7.1% | 1.8% | 0.0% |
| 15 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.5M | $15.9M | 0.0% | 1.7% | +21.4% |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | 1.3M | $14.3M | 0.0% | 1.6% | -0.9% |
| 17 | WASATCH ADVISORS LP | 1.3M | $14.2M | 0.1% | 1.6% | -2.5% |
| 18 | Ensign Peak Advisors, Inc | 1.1M | $11.4M | 0.0% | 1.3% | -35.4% |
| 19 | Propel Bio Management, LLC | 1.1M | $11.4M | 6.0% | 1.3% | +24.9% |
| 20 | Point72 Asset Management, L.P.NEW | 1.0M | $11.1M | 0.0% | 1.2% | new |
| 21 | VANGUARD PORTFOLIO MANAGEMENT LLC | 796,631 | $8.6M | 0.0% | 1% | +19.6% |
| 22 | HSBC HOLDINGS PLCNEW | 709,695 | $7.7M | 0.0% | 0.8% | new |
| 23 | MARSHALL WACE, LLP | 666,090 | $7.2M | 0.0% | 0.8% | -22.6% |
| 24 | EcoR1 Capital, LLC | 625,000 | $6.8M | 0.3% | 0.7% | 0.0% |
| 25 | PERCEPTIVE ADVISORS LLC | 532,000 | $5.8M | 0.1% | 0.6% | -42.5% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.