MIRM Mirum Pharmaceuticals, Inc.
Mirum Pharmaceuticals, Inc. (MIRM) Institutional Ownership
What the institutions did with MIRM 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. | 7.7M | 10.8% |
| Jupiter Topco LLC | 5.9M | 8.3% |
| BlackRock, Inc. | 4.4M | 6.1% |
| FMR LLC | 3.7M | 5.1% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.7M | 3.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.4M | 3.3% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.3M | 3.2% |
| STATE STREET CORP | 2.2M | 3.0% |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1.4M | 2.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.4M | 2.0% |
| Invesco Ltd. | 1.4M | 1.9% |
| WELLINGTON MANAGEMENT GROUP LLP | 1.3M | 1.8% |
| EVENTIDE ASSET MANAGEMENT, LLC | 1.2M | 1.7% |
| TANG CAPITAL MANAGEMENT LLC | 1.2M | 1.7% |
| Capital World Investors | 1.2M | 1.6% |
| FRANKLIN RESOURCES INC | 1.2M | 1.6% |
| NOVO HOLDINGS A/S | 1.1M | 1.6% |
| TCG Crossover Management, LLC | 1.1M | 1.5% |
| BVF INC/IL | 1.1M | 1.5% |
| Polar Capital Holdings Plc | 845.5K | 1.2% |
| Rock Springs Capital Management LP | 798.1K | 1.1% |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 752.0K | 1.1% |
| AMERIPRISE FINANCIAL INC | 726.7K | 1.0% |
| TWO SIGMA INVESTMENTS, LP | 690.3K | 1.0% |
| Bank of New York Mellon Corp | 670.0K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Increased | 2.0M | 3.7M | +1.7M |
| Invesco Ltd. | Increased | 285.2K | 1.4M | +1.1M |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Increased | 335.7K | 1.4M | +1.1M |
| CITADEL ADVISORS LLC | Sold Out | 1.1M | 0 | -1.1M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 1.4M | 2.4M | +944.9K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1.7M | 2.7M | +938.2K |
| Paradigm Biocapital Advisors LP | Sold Out | 625.0K | 0 | -625.0K |
| Polar Capital Holdings Plc | Increased | 283.5K | 845.5K | +562.0K |
| BlackRock, Inc. | Increased | 3.8M | 4.4M | +543.5K |
| BVF INC/IL | Reduced | 1.6M | 1.1M | -528.7K |
| AMERIPRISE FINANCIAL INC | Increased | 219.3K | 726.7K | +507.4K |
| FRANKLIN RESOURCES INC | Increased | 714.8K | 1.2M | +438.0K |
| Capital World Investors | Increased | 724.4K | 1.2M | +429.1K |
| Point72 Asset Management, L.P. | Sold Out | 347.0K | 0 | -347.0K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Increased | 405.3K | 752.0K | +346.7K |
| Soleus Capital Management, L.P. | Reduced | 400.3K | 75.0K | -325.3K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 911.4K | 606.4K | -305.0K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 368.6K | 96.2K | -272.4K |
| STATE STREET CORP | Increased | 1.9M | 2.2M | +226.4K |
| PANAGORA ASSET MANAGEMENT INC | Increased | 129.1K | 337.5K | +208.3K |
| NOVO HOLDINGS A/S | Reduced | 1.3M | 1.1M | -200.0K |
| Logos Global Management LP | Sold Out | 200.0K | 0 | -200.0K |
| First Turn Management, LLC | Reduced | 400.5K | 218.1K | -182.4K |
| MORGAN STANLEY | Reduced | 524.6K | 351.4K | -173.2K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 2.4M | 2.3M | -160.7K |
| EVENTIDE ASSET MANAGEMENT, LLC | Reduced | 1.4M | 1.2M | -160.5K |
| BANK OF AMERICA CORP /DE/ | Reduced | 722.2K | 561.7K | -160.5K |
| Nuveen, LLC | Reduced | 474.2K | 329.3K | -144.9K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 582.1K | 442.2K | -139.9K |
| D. E. Shaw & Co., Inc. | Reduced | 167.5K | 27.9K | -139.6K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.3M | 1.4M | +133.9K |
| PERCEPTIVE ADVISORS LLC | New | 0 | 115.4K | +115.4K |
| UBS Group AG | Reduced | 495.0K | 379.8K | -115.2K |
| GOLDMAN SACHS GROUP INC | Reduced | 662.3K | 549.9K | -112.4K |
| Seven Fleet Capital Management LP | New | 0 | 110.4K | +110.4K |
| Trails Edge Capital Partners, LP | Reduced | 333.3K | 223.3K | -110.0K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Sold Out | 104.1K | 0 | -104.1K |
| Pictet Asset Management Holding SA | Increased | 423.5K | 526.4K | +102.9K |
| Capricorn Fund Managers Ltd | New | 0 | 101.2K | +101.2K |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Increased | 286.4K | 384.6K | +98.2K |
| Atle Fund Management AB | Reduced | 195.8K | 100.8K | -95.0K |
| PEREGRINE CAPITAL MANAGEMENT LLC | New | 0 | 88.8K | +88.8K |
| Candriam S.C.A. | Reduced | 464.2K | 376.1K | -88.1K |
| ExodusPoint Capital Management, LP | Sold Out | 87.4K | 0 | -87.4K |
| Bank of New York Mellon Corp | Increased | 584.5K | 670.0K | +85.5K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 774.8K | 690.3K | -84.5K |
| LORD, ABBETT & CO. LLC | Reduced | 617.1K | 541.0K | -76.1K |
| EMERALD ADVISERS, LLC | Increased | 397.3K | 468.3K | +71.0K |
| FEDERATED HERMES, INC. | Reduced | 506.2K | 436.6K | -69.6K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Sold Out | 67.9K | 0 | -67.9K |
| Voleon Capital Management LP | Reduced | 150.5K | 82.9K | -67.6K |
| ARISTEIA CAPITAL, L.L.C. | New | 0 | 64.5K | +64.5K |
| Connor, Clark & Lunn Investment Management Ltd. | Reduced | 479.5K | 420.1K | -59.4K |
| NEUBERGER BERMAN GROUP LLC | Increased | 80.5K | 139.4K | +58.9K |
| Squarepoint Ops LLC | Reduced | 61.7K | 2.9K | -58.8K |
| NORTHERN TRUST CORP | Increased | 394.9K | 452.0K | +57.1K |
| BANK OF MONTREAL /CAN/ | Sold Out | 56.4K | 0 | -56.4K |
| Hennion & Walsh Asset Management, Inc. | Reduced | 93.6K | 37.5K | -56.1K |
| Trexquant Investment LP | New | 0 | 53.3K | +53.3K |
| Balyasny Asset Management L.P. | Reduced | 539.0K | 489.2K | -49.9K |
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.