Ken Griffin
MRUS

Ken Griffin’s Merus MRUS Stock Holding History

Ken Griffin’s Portfolio MRUS Stock Details MRUS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-614,538
Closed -$57.9M – 13574
2025
Q3 		$57.9M Buy
614,538
+278,944
+83% +$18.2M 0.01% 1246
2025
Q2 		$17.7M Buy
335,594
+308,605
+1,143% +$14.5M ﹤0.01% 2297
2025
Q1 		$1.14M Buy
26,989
+18,886
+233% +$824K ﹤0.01% 6688
2024
Q4 		$341K Sell
8,103
-211,116
-96% -$10.1M ﹤0.01% 9398
2024
Q3 		$11M Buy
219,219
+37,366
+21% +$1.95M ﹤0.01% 2760
2024
Q2 		$10.8M Sell
181,853
-170,355
-48% -$8.25M ﹤0.01% 2681
2024
Q1 		$15.9M Buy
352,208
+71,957
+26% +$2.92M ﹤0.01% 2337
2023
Q4 		$7.71M Buy
280,251
+277,066
+8,699% +$6.47M ﹤0.01% 3182
2023
Q3 		$75.1K Sell
3,185
-83,099
-96% -$2.02M ﹤0.01% 11244
2023
Q2 		$2.27M Sell
86,284
-59,175
-41% -$1.3M ﹤0.01% 4939
2023
Q1 		$2.68M Buy
145,459
+87,533
+151% +$1.52M ﹤0.01% 4833
2022
Q4 		$896K Sell
57,926
-7,845
-12% -$138K ﹤0.01% 7017
2022
Q3 		$1.32M Buy
65,771
+49,712
+310% +$1.19M ﹤0.01% 6411
2022
Q2 		$364K Sell
16,059
-662,676
-98% -$13.8M ﹤0.01% 9370
2022
Q1 		$17.9M Buy
678,735
+81,393
+14% +$2.18M ﹤0.01% 2101
2021
Q4 		$19M Buy
597,342
+419,152
+235% +$11.8M ﹤0.01% 2088
2021
Q3 		$3.92M Sell
178,190
-35,446
-17% -$760K ﹤0.01% 4797
2021
Q2 		$4.5M Buy
213,636
+162,986
+322% +$3.6M ﹤0.01% 4665
2021
Q1 		$1.06M Buy
+50,650
New +$1.17M ﹤0.01% 7972
2020
Q3 		– Sell
-20,565
Closed -$331K – 10490
2020
Q2 		$331K Buy
+20,565
New +$298K ﹤0.01% 7757

Other funds holding MRUS

DekaBank Deutsche Girozentrale
DekaBank Deutsche Girozentrale Frankfurt, Germany $59.2B AUM 26.02% 1-Year Est. Return
XT
XTX Topco George Town, Cayman Islands $5.75B AUM 30.56% 1-Year Est. Return
BIG
Brooklyn Investment Group Brooklyn, New York $3.2B AUM 26.32% 1-Year Est. Return
NAM
NTV Asset Management Charleston, West Virginia $1.02B AUM 31.16% 1-Year Est. Return
FFA
Farther Finance Advisors San Francisco, California $12.8B AUM 26.53% 1-Year Est. Return
Simplex Trading
Simplex Trading Chicago, Illinois $171B AUM 85% 1-Year Est. Return
EWA
EverSource Wealth Advisors Birmingham, Alabama $2.97B AUM 28.72% 1-Year Est. Return
PA
Parallel Advisors San Francisco, California $6.56B AUM 32.24% 1-Year Est. Return
IA
IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

Ken Griffin's MRUS Position: Q4 2025 in Review

Ken Griffin sold out of Merus (MRUS) in Q4 2025, closing a stake of 614,538 shares — an estimated $57.9M sold.

Ken Griffin first reported a position in MRUS in Q2 2020 and held it in 20 quarters. The position peaked at $57.9M in Q3 2025. 10 funds tracked by Wall St. Rank hold MRUS as of Q4 2025.

  • Ken Griffin reported no remaining Merus position as of Q4 2025 after selling out during the quarter.
  • Ken Griffin sold 614,538 Merus shares in Q4 2025, an estimated $57.9M.
  • Ken Griffin first reported a position in Merus in Q2 2020 and held it in 20 quarters.
  • Ken Griffin's Merus position peaked at $57.9M in Q3 2025.
  • 10 funds tracked by Wall St. Rank held Merus as of Q4 2025.

Based on Citadel Advisors's 13F filing for Q4 2025, filed 17 Feb 2026.