Jim Simons
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Jim Simons’s Mirum Pharmaceuticals MIRM Stock Holding History

Jim Simons’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 		$53.8M Buy
582,085
+143,000
+33% +$13.5M 0.08% 301
2025
Q4 		$34.7M Sell
439,085
-74,363
-14% -$5.34M 0.05% 403
2025
Q3 		$37.6M Buy
513,448
+117,100
+30% +$7.44M 0.05% 448
2025
Q2 		$20.2M Buy
396,348
+207,848
+110% +$9.25M 0.03% 712
2025
Q1 		$8.49M Buy
188,500
+87,252
+86% +$4.11M 0.01% 1095
2024
Q4 		$4.19M Buy
101,248
+40,800
+67% +$1.7M 0.01% 1558
2024
Q3 		$2.36M Buy
+60,448
New +$2.41M ﹤0.01% 1909
2024
Q1 		– Sell
-58,648
Closed -$1.73M – 3933
2023
Q4 		$1.73M Sell
58,648
-10,052
-15% -$304K ﹤0.01% 2047
2023
Q3 		$2.17M Buy
68,700
+57,100
+492% +$1.56M ﹤0.01% 1816
2023
Q2 		$300K Sell
11,600
-2,000
-15% -$53.2K ﹤0.01% 3120
2023
Q1 		$327K Sell
13,600
-79,700
-85% -$1.82M ﹤0.01% 3073
2022
Q4 		$1.82M Buy
+93,300
New +$1.84M ﹤0.01% 2132
2022
Q3 		– Sell
-41,500
Closed -$808K – 4277
2022
Q2 		$808K Buy
41,500
+8,300
+25% +$196K ﹤0.01% 2850
2022
Q1 		$731K Buy
33,200
+4,800
+17% +$97.9K ﹤0.01% 2936
2021
Q4 		$453K Sell
28,400
-6,900
-20% -$107K ﹤0.01% 3121
2021
Q3 		$703K Sell
35,300
-14,100
-29% -$229K ﹤0.01% 2733
2021
Q2 		$854K Buy
+49,400
New +$885K ﹤0.01% 2741
2021
Q1 		– Sell
-42,900
Closed -$749K – 3559
2020
Q4 		$749K Buy
+42,900
New +$843K ﹤0.01% 2641
2020
Q3 		– Sell
-13,000
Closed -$253K – 3558
2020
Q2 		$253K Buy
+13,000
New +$217K ﹤0.01% 3099

Other funds holding MIRM

FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 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 $3.37T AUM 44.26% 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

Jim Simons's MIRM Position: Q1 2026 in Review

Jim Simons increased its Mirum Pharmaceuticals (MIRM) stake by 33% in Q1 2026, buying an estimated $13.5M and bringing the position to 582,085 shares worth $53.8M. The position accounts for 0.08% of the portfolio, ranked #301.

Jim Simons first reported a position in MIRM in Q2 2020 and has held it in 19 quarters since. 311 funds tracked by Wall St. Rank hold MIRM as of Q1 2026.

  • Jim Simons held 582,085 shares of Mirum Pharmaceuticals worth $53.8M as of Q1 2026.
  • Jim Simons bought 143,000 Mirum Pharmaceuticals shares in Q1 2026, an estimated $13.5M.
  • Mirum Pharmaceuticals made up 0.08% of Jim Simons's portfolio in Q1 2026, its #301 holding.
  • Jim Simons first reported a position in Mirum Pharmaceuticals in Q2 2020 and has held it in 19 quarters since.
  • 311 funds tracked by Wall St. Rank held Mirum Pharmaceuticals as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.