PHAT Phathom Pharmaceuticals, Inc.
Phathom Pharmaceuticals, Inc. (PHAT) Institutional Ownership
What the institutions did with PHAT last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Frazier Life Sciences Management, L.P. | 12.5M | 17.3% |
| Medicxi Ventures Management (Jersey) Ltd | 7.5M | 10.4% |
| BlackRock, Inc. | 4.5M | 6.3% |
| Invesco Ltd. | 4.0M | 5.6% |
| Carlyle Group Inc. | 3.5M | 4.9% |
| MILLENNIUM MANAGEMENT LLC | 3.4M | 4.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.7M | 3.7% |
| GW&K Investment Management, LLC | 2.2M | 3.0% |
| FRANKLIN RESOURCES INC | 2.0M | 2.7% |
| NEA Management Company, LLC | 2.0M | 2.7% |
| 683 Capital Management, LLC | 1.9M | 2.6% |
| GOLDMAN SACHS GROUP INC | 1.8M | 2.5% |
| STATE STREET CORP | 1.6M | 2.2% |
| Catalys Pacific, LLC | 1.5M | 2.1% |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.5M | 2.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.3M | 1.8% |
| WASATCH ADVISORS LP | 1.3M | 1.8% |
| Ensign Peak Advisors, Inc | 1.1M | 1.5% |
| Propel Bio Management, LLC | 1.1M | 1.5% |
| Point72 Asset Management, L.P. | 1.0M | 1.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 796.6K | 1.1% |
| SummitTX Capital, L.P. | 789.6K | 1.1% |
| HSBC HOLDINGS PLC | 709.7K | 1.0% |
| MARSHALL WACE, LLP | 666.1K | 0.9% |
| EcoR1 Capital, LLC | 625.0K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| GOLDMAN SACHS GROUP INC | Increased | 626.2K | 1.8M | +1.2M |
| Point72 Asset Management, L.P. | New | 0 | 1.0M | +1.0M |
| FRANKLIN RESOURCES INC | Increased | 994.5K | 2.0M | +976.3K |
| GW&K Investment Management, LLC | Increased | 1.4M | 2.2M | +745.7K |
| HSBC HOLDINGS PLC | New | 0 | 709.7K | +709.7K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 4.0M | 3.4M | -647.1K |
| Ensign Peak Advisors, Inc | Reduced | 1.6M | 1.1M | -575.9K |
| BlackRock, Inc. | Increased | 4.1M | 4.5M | +463.1K |
| PERCEPTIVE ADVISORS LLC | Reduced | 925.0K | 532.0K | -393.0K |
| Avidity Partners Management LP | Reduced | 498.8K | 200.0K | -298.8K |
| Invesco Ltd. | Reduced | 4.3M | 4.0M | -292.3K |
| Susquehanna Portfolio Strategies, LLC | Sold Out | 268.0K | 0 | -268.0K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Increased | 1.2M | 1.5M | +257.4K |
| Catalio Capital Management, LP | Sold Out | 247.8K | 0 | -247.8K |
| Squarepoint Ops LLC | Reduced | 275.2K | 31.6K | -243.6K |
| JANE STREET GROUP, LLC | New | 0 | 212.7K | +212.7K |
| Propel Bio Management, LLC | Increased | 841.3K | 1.1M | +209.1K |
| SummitTX Capital, L.P. | Reduced | 995.9K | 789.6K | -206.3K |
| STATE STREET CORP | Increased | 1.4M | 1.6M | +199.4K |
| CITADEL ADVISORS LLC | Reduced | 383.1K | 184.9K | -198.2K |
| MARSHALL WACE, LLP | Reduced | 860.7K | 666.1K | -194.6K |
| Opaleye Management Inc. | New | 0 | 185.6K | +185.6K |
| Hennion & Walsh Asset Management, Inc. | Increased | 145.9K | 327.3K | +181.3K |
| Jump Financial, LLC | Increased | 26.4K | 191.9K | +165.4K |
| Jones Hill Capital LP | New | 0 | 161.5K | +161.5K |
| UBS Group AG | Reduced | 360.4K | 204.6K | -155.8K |
| Birchview Capital, LP | Reduced | 195.0K | 55.0K | -140.0K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 666.0K | 796.6K | +130.6K |
| MORGAN STANLEY | Increased | 76.7K | 199.9K | +123.2K |
| Trexquant Investment LP | Reduced | 293.3K | 173.9K | -119.4K |
| WELLS FARGO & COMPANY/MN | Increased | 46.1K | 152.0K | +105.9K |
| SCHRODER INVESTMENT MANAGEMENT GROUP | New | 0 | 101.7K | +101.7K |
| Balyasny Asset Management L.P. | Sold Out | 95.3K | 0 | -95.3K |
| Freestone Grove Partners LP | Sold Out | 84.6K | 0 | -84.6K |
| HUSSMAN STRATEGIC ADVISORS, INC. | Sold Out | 84.0K | 0 | -84.0K |
| Brevan Howard Capital Management LP | Reduced | 94.6K | 14.6K | -80.0K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 55.5K | 134.9K | +79.4K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 305.8K | 226.4K | -79.4K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | New | 0 | 77.3K | +77.3K |
| DIADEMA PARTNERS LP | Increased | 54.7K | 130.0K | +75.3K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 93.0K | 17.7K | -75.3K |
| Burkehill Global Management, LP | Sold Out | 75.0K | 0 | -75.0K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 2.6M | 2.7M | +73.3K |
| GSA CAPITAL PARTNERS LLP | Reduced | 97.1K | 30.1K | -66.9K |
| BANK OF AMERICA CORP /DE/ | Reduced | 208.1K | 151.0K | -57.1K |
| Virtus Investment Advisers, LLC | Increased | 58.0K | 112.1K | +54.2K |
| GILDER GAGNON HOWE & CO LLC | Reduced | 139.9K | 88.1K | -51.8K |
| Pale Fire Capital SE | New | 0 | 49.7K | +49.7K |
| Engineers Gate Manager LP | Increased | 73.8K | 118.3K | +44.4K |
| NORTHERN TRUST CORP | Increased | 415.0K | 458.3K | +43.3K |
| Quantbot Technologies LP | New | 0 | 42.8K | +42.8K |
| Aquatic Capital Management LLC | Sold Out | 40.9K | 0 | -40.9K |
| NOMURA HOLDINGS INC | New | 0 | 40.0K | +40.0K |
| Y-Intercept (Hong Kong) Ltd | New | 0 | 39.8K | +39.8K |
| AMERIPRISE FINANCIAL INC | Increased | 254.2K | 294.0K | +39.8K |
| ALGERT GLOBAL LLC | Sold Out | 39.4K | 0 | -39.4K |
| VARCOV Co. | Sold Out | 39.2K | 0 | -39.2K |
| TUDOR INVESTMENT CORP ET AL | Sold Out | 38.2K | 0 | -38.2K |
| TWO SIGMA INVESTMENTS, LP | Increased | 482.1K | 519.1K | +36.9K |
| D. E. Shaw & Co., Inc. | Reduced | 132.5K | 95.7K | -36.8K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.