Jim Simons
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Jim Simons’s Caribou Biosciences CRBU Stock Holding History

Jim Simons’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
Q2 		$4.88M Buy
2,773,545
+183,048
+7% +$362K 0.01% 1479
2026
Q1 		$4.92M Buy
2,590,497
+950,640
+58% +$1.63M 0.01% 1393
2025
Q4 		$2.61M Buy
1,639,857
+859,436
+110% +$1.8M ﹤0.01% 1701
2025
Q3 		$1.82M Buy
780,421
+248,300
+47% +$469K ﹤0.01% 2139
2025
Q2 		$670K Buy
+532,121
New +$523K ﹤0.01% 2691
2024
Q4 		– Sell
-594,200
Closed -$1.16M – 3623
2024
Q3 		$1.16M Sell
594,200
-888,700
-60% -$1.82M ﹤0.01% 2348
2024
Q2 		$2.43M Buy
+1,482,900
New +$4.74M ﹤0.01% 1750
2024
Q1 		– Sell
-32,400
Closed -$186K – 3758
2023
Q4 		$186K Buy
+32,400
New +$160K ﹤0.01% 3154
2023
Q2 		– Sell
-77,700
Closed -$413K – 3970
2023
Q1 		$413K Buy
+77,700
New +$484K ﹤0.01% 2977
2022
Q3 		– Sell
-239,000
Closed -$1.3M – 4068
2022
Q2 		$1.3M Buy
239,000
+93,900
+65% +$718K ﹤0.01% 2528
2022
Q1 		$1.33M Buy
145,100
+49,151
+51% +$518K ﹤0.01% 2529
2021
Q4 		$1.45M Buy
+95,949
New +$1.87M ﹤0.01% 2393

Other funds holding CRBU

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Pfizer
Pfizer New York $170M AUM 191.09% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Mackenzie Financial
Mackenzie Financial Toronto Ontario, Ontario, Canada $100B AUM 36.93% 1-Year Est. Return
KCM
Kynam Capital Management Princeton, New Jersey $1.81B AUM 192.15% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Jim Simons's CRBU Position: Q2 2026 in Review

Jim Simons increased its Caribou Biosciences (CRBU) stake by 7.1% in Q2 2026, buying an estimated $362K and bringing the position to 2,773,545 shares worth $4.88M. The position accounts for 0.01% of the portfolio, ranked #1479.

Jim Simons first reported a position in CRBU in Q4 2021 and has held it in 12 quarters since. The position peaked at $4.92M in Q1 2026. 137 funds tracked by Wall St. Rank hold CRBU as of Q2 2026.

  • Jim Simons held 2,773,545 shares of Caribou Biosciences worth $4.88M as of Q2 2026.
  • Jim Simons bought 183,048 Caribou Biosciences shares in Q2 2026, an estimated $362K.
  • Caribou Biosciences made up 0.01% of Jim Simons's portfolio in Q2 2026, its #1479 holding.
  • Jim Simons first reported a position in Caribou Biosciences in Q4 2021 and has held it in 12 quarters since.
  • Jim Simons's Caribou Biosciences position peaked at $4.92M in Q1 2026.
  • 137 funds tracked by Wall St. Rank held Caribou Biosciences as of Q2 2026.

Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.