Simplex Trading
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Simplex Trading’s Caribou Biosciences CRBU Stock Holding History

Simplex Trading’s Portfolio CRBU Stock Details CRBU Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-21,123
Closed -$44.3K – 8774
2025
Q3 		$49K Buy
+21,123
New +$39.9K ﹤0.01% 6473
2024
Q3 		– Sell
-8,613
Closed -$17.6K – 8630
2024
Q2 		$14K Sell
8,613
-10,599
-55% -$33.9K ﹤0.01% 7168
2024
Q1 		$98K Buy
19,212
+1,899
+11% +$11.7K ﹤0.01% 5594
2023
Q4 		$99K Buy
17,313
+12,691
+275% +$62.7K ﹤0.01% 5396
2023
Q3 		$22K Sell
4,622
-3,439
-43% -$21.3K ﹤0.01% 6532
2023
Q2 		$34K Buy
8,061
+6,868
+576% +$30.9K ﹤0.01% 6210
2023
Q1 		$6K Sell
1,193
-3,672
-75% -$22.9K ﹤0.01% 7899
2022
Q4 		$30K Sell
4,865
-6,996
-59% -$62.3K ﹤0.01% 6455
2022
Q3 		$125K Buy
11,861
+4,954
+72% +$46.2K ﹤0.01% 5222
2022
Q2 		$37K Buy
6,907
+4,219
+157% +$32.3K ﹤0.01% 6871
2022
Q1 		$24K Sell
2,688
-1,418
-35% -$14.9K ﹤0.01% 8024
2021
Q4 		$61K Buy
+4,106
New +$79.9K ﹤0.01% 6963

Other funds holding CRBU

P
Pfizer New York $239M AUM 232.47% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
KCM
Kynam Capital Management Princeton, New Jersey $1.62B AUM 138.67% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $61.9B AUM 29.81% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Simplex Trading's CRBU Position: Q4 2025 in Review

Simplex Trading sold out of Caribou Biosciences (CRBU) in Q4 2025, closing a stake of 21,123 shares — an estimated $44.3K sold.

Simplex Trading first reported a position in CRBU in Q4 2021 and held it in 12 quarters. The position peaked at $125K in Q3 2022. 124 funds tracked by Wall St. Rank hold CRBU as of Q4 2025.

  • Simplex Trading reported no remaining Caribou Biosciences position as of Q4 2025 after selling out during the quarter.
  • Simplex Trading sold 21,123 Caribou Biosciences shares in Q4 2025, an estimated $44.3K.
  • Simplex Trading first reported a position in Caribou Biosciences in Q4 2021 and held it in 12 quarters.
  • Simplex Trading's Caribou Biosciences position peaked at $125K in Q3 2022.
  • 124 funds tracked by Wall St. Rank held Caribou Biosciences as of Q4 2025.

Based on Simplex Trading's 13F filing for Q4 2025, filed 11 Feb 2026.