MIRUM PHARMACEUTICALS INC (MIRM) Institutional Ownership Changes & 13F Activity

MIRUM PHARMACEUTICALS INC (MIRM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC and Polen Capital Management.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCBuy143,000582,085$53,773,012
Q1 2026Polen Capital ManagementBuy7,17120,531$1,896,654
Q4 2025Renaissance Technologies LLCSell-74,363439,085$34,683,324
Q4 2025Polen Capital ManagementBuy2113,360$1,055,306
Q3 2025Renaissance Technologies LLCBuy117,100513,448$37,640,873
Q3 2025Polen Capital ManagementSell-2,16813,339$977,882
Q2 2025Renaissance Technologies LLCBuy207,848396,348$20,170,150
Q2 2025Polen Capital ManagementBuy15,50715,507$789,151
Q1 2025Renaissance Technologies LLCBuy87,252188,500$8,491,925
Q4 2024Renaissance Technologies LLCBuy40,800101,248$4,186,605
Q3 2024Renaissance Technologies LLCBuy1,80060,448$2,357,472
Q4 2023Renaissance Technologies LLCSell-10,05258,648$1,731
Q3 2023Renaissance Technologies LLCBuy57,10068,700$2,171
Q2 2023Renaissance Technologies LLCSell-2,00011,600$300
Q1 2023Renaissance Technologies LLCSell-79,70013,600$327
Q4 2022Renaissance Technologies LLCBuy51,80093,300$1,819
Q2 2022Renaissance Technologies LLCBuy8,30041,500$808
Q1 2022Renaissance Technologies LLCBuy4,80033,200$731
Q4 2021Renaissance Technologies LLCSell-6,90028,400$453
Q3 2021Renaissance Technologies LLCSell-14,10035,300$703
Q2 2021Renaissance Technologies LLCBuy6,50049,400$854
Q4 2020Renaissance Technologies LLCBuy29,90042,900$749
Q2 2020Renaissance Technologies LLCBuy13,00013,000$253

Frequently asked questions about MIRM activity

  • Which institutional owners are buying MIRM?

    Institutional owners buying MIRM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MIRM activity?

    "Buy" means an investor increased their reported position in MIRM compared to the prior reporting period. This reflects growing exposure to MIRUM PHARMACEUTICALS INC (MIRM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MIRM increasing?

    Institutional interest in MIRM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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