Mirum Pharmaceuticals, Inc. (MIRM) Institutional Ownership

Ownership Summary

Mirum Pharmaceuticals, Inc. (NASDAQ:MIRM) is held by 277 institutional investors per 13F filings through December 2025.

• These investors collectively held 104.3% of Mirum Pharmaceuticals's outstanding shares in December 2025, up from 101.6% in September 2025.
• They increased total shares held in Mirum Pharmaceuticals by 8.56% from last quarter, and the number of investors in MIRM increased 35.12% annually.
• Among the 277 funds, 160 bought more Mirum Pharmaceuticals shares, 81 sold down, and 36 held their ground.
• In total, institutional investors held 59.46Mn shares in Mirum Pharmaceuticals as of December 2025, up by 4.69Mn shares quarter on quarter, and up 4.66Mn shares year over year.
• Janus Henderson Group Plc holds the largest position in MIRM at 13.74Mn shares as of December 31, 2025, or 24.1% of shares outstanding.
• Leading buyers of Mirum Pharmaceuticals shares for the quarter ending December 2025 were Janus Henderson Group Plc (7.67Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.41Mn), PRICE T ROWE ASSOCIATES INC /MD/ (1.72Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.43Mn), FMR LLC (1.32Mn).
• The largest sales of MIRM for the quarter ending December 2025 came from Goldman Sachs Group Inc (786.33K), D. E. Shaw & Co., Inc. (780.67K), EVENTIDE ASSET MANAGEMENT, LLC (684.71K), Polar Capital Holdings Plc (510.16K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (304.63K).
• Per Business Quant data, the top 10 holders of Mirum Pharmaceuticals for the quarter ending December 2025 are Janus Henderson Group Plc (13.74Mn), Frazier Life Sciences Management, L.P. (7.68Mn), BlackRock, Inc. (3.85Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.41Mn), FMR LLC (1.97Mn), State Street Corp (1.94Mn), PRICE T ROWE ASSOCIATES INC /MD/ (1.72Mn), BVF INC/IL (1.58Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.43Mn), EVENTIDE ASSET MANAGEMENT, LLC (1.41Mn).