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
2026
Q1 		$7.79K Sell
4,100
-900
-18% -$1.54K ﹤0.01% 7571
2025
Q4 		$7.95K Buy
5,000
+900
+22% +$1.89K ﹤0.01% 7140
2025
Q3 		$9K Buy
+4,100
New +$7.74K ﹤0.01% 7946
2025
Q2 		– Sell
-15,200
Closed -$13K – 8787
2025
Q1 		$13K Buy
15,200
+10,300
+210% +$13.4K ﹤0.01% 6890
2024
Q4 		$7K Sell
4,900
-1,700
-26% -$3.42K ﹤0.01% 7401
2024
Q3 		$12K Buy
6,600
+2,900
+78% +$5.94K ﹤0.01% 7054
2024
Q2 		$6K Buy
3,700
+200
+6% +$639 ﹤0.01% 7740
2024
Q1 		$17K Sell
3,500
-10,200
-74% -$62.9K ﹤0.01% 7211
2023
Q4 		$78K Buy
+13,700
New +$67.7K ﹤0.01% 5623
2023
Q3 		– Sell
-3,700
Closed -$15K – 8804
2023
Q2 		$15K Buy
3,700
+1,900
+106% +$8.54K ﹤0.01% 7023
2023
Q1 		$9K Sell
1,800
-1,100
-38% -$6.85K ﹤0.01% 7604
2022
Q4 		$18K Sell
2,900
-1,000
-26% -$8.9K ﹤0.01% 6966
2022
Q3 		$41K Sell
3,900
-4,000
-51% -$37.3K ﹤0.01% 6692
2022
Q2 		$42K Sell
7,900
-400
-5% -$3.06K ﹤0.01% 6710
2022
Q1 		$76K Sell
8,300
-1,800
-18% -$19K ﹤0.01% 6528
2021
Q4 		$152K Buy
+10,100
New +$196K ﹤0.01% 5580

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.