Janus Henderson Group
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Janus Henderson Group’s Mirum Pharmaceuticals MIRM Stock Holding History

Janus Henderson Group’s Portfolio MIRM Stock Details MIRM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$642M Buy
6,945,813
+880,505
+15% +$82.8M 0.31% 73
2025
Q4 		$479M Buy
6,065,308
+1,067,722
+21% +$76.6M 0.21% 111
2025
Q3 		$367M Sell
4,997,586
-238,691
-5% -$15.2M 0.17% 120
2025
Q2 		$266M Buy
5,236,277
+470,168
+10% +$20.9M 0.13% 162
2025
Q1 		$219M Buy
4,766,109
+184,467
+4% +$8.69M 0.12% 178
2024
Q4 		$189M Buy
4,581,642
+101,358
+2% +$4.22M 0.1% 200
2024
Q3 		$175M Sell
4,480,284
-508,463
-10% -$20.3M 0.09% 202
2024
Q2 		$171M Buy
4,988,747
+2,221,537
+80% +$58.2M 0.09% 192
2024
Q1 		$69.5M Buy
2,767,210
+704,659
+34% +$19.4M 0.04% 326
2023
Q4 		$60.9M Buy
2,062,551
+138,791
+7% +$4.2M 0.04% 337
2023
Q3 		$60.8M Buy
1,923,760
+1,658,148
+624% +$45.4M 0.04% 331
2023
Q2 		$6.86M Buy
265,612
+224,328
+543% +$5.97M ﹤0.01% 769
2023
Q1 		$991K Buy
+41,284
New +$941K ﹤0.01% 1636

Other funds holding MIRM

FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
BI
BVF Inc San Francisco, California $3.14B AUM 249.53% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
EAM
Eventide Asset Management Boston, Massachusetts $6.05B AUM 76.64% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Janus Henderson Group's MIRM Position: Q1 2026 in Review

Janus Henderson Group increased its Mirum Pharmaceuticals (MIRM) stake by 15% in Q1 2026, buying an estimated $82.8M and bringing the position to 6,945,813 shares worth $642M. The position accounts for 0.31% of the portfolio, ranked #73.

Janus Henderson Group first reported a position in MIRM in Q1 2023 and has held it in 13 quarters since. 311 funds tracked by Wall St. Rank hold MIRM as of Q1 2026.

  • Janus Henderson Group held 6,945,813 shares of Mirum Pharmaceuticals worth $642M as of Q1 2026.
  • Janus Henderson Group bought 880,505 Mirum Pharmaceuticals shares in Q1 2026, an estimated $82.8M.
  • Mirum Pharmaceuticals made up 0.31% of Janus Henderson Group's portfolio in Q1 2026, its #73 holding.
  • Janus Henderson Group first reported a position in Mirum Pharmaceuticals in Q1 2023 and has held it in 13 quarters since.
  • 311 funds tracked by Wall St. Rank held Mirum Pharmaceuticals as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.