Jane Street
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Jane Street’s Quantum-Si Incorporated QSI Stock Holding History

Jane Street’s Portfolio QSI Stock Details QSI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-1,104,033
Closed -$1.14M – 12729
2025
Q4 		$1.21M Sell
1,104,033
-505,990
-31% -$824K ﹤0.01% 5754
2025
Q3 		$2.27M Buy
1,610,023
+1,325,270
+465% +$1.92M ﹤0.01% 4701
2025
Q2 		$558K Buy
+284,753
New +$421K ﹤0.01% 6708
2025
Q1 		– Sell
-23,845
Closed -$45.7K – 10399
2024
Q4 		$64.4K Sell
23,845
-232,844
-91% -$273K ﹤0.01% 8911
2024
Q3 		$226K Sell
256,689
-47,367
-16% -$46K ﹤0.01% 8473
2024
Q2 		$319K Buy
304,056
+152,933
+101% +$245K ﹤0.01% 7712
2024
Q1 		$298K Buy
151,123
+138,909
+1,137% +$243K ﹤0.01% 7583
2023
Q4 		$24.6K Sell
12,214
-15,571
-56% -$23.7K ﹤0.01% 8882
2023
Q3 		$46.1K Buy
27,785
+486
+2% +$1.17K ﹤0.01% 8168
2023
Q2 		$48.9K Sell
27,299
-103,738
-79% -$163K ﹤0.01% 8213
2023
Q1 		$231K Buy
+131,037
New +$258K ﹤0.01% 7618
2022
Q4 		– Sell
-11,455
Closed -$29.5K – 9947
2022
Q3 		$31K Buy
+11,455
New +$36.6K ﹤0.01% 9083
2022
Q2 		– Sell
-68,248
Closed -$261K – 10631
2022
Q1 		$319K Buy
+68,248
New +$333K ﹤0.01% 8302
2021
Q4 		– Sell
-24,831
Closed -$187K – 10678
2021
Q3 		$207K Sell
24,831
-18,773
-43% -$185K ﹤0.01% 8789
2021
Q2 		$534K Buy
43,604
+14,673
+51% +$154K ﹤0.01% 7113
2021
Q1 		$345K Buy
+28,931
New +$350K ﹤0.01% 7479

Other funds holding QSI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
AIM
ARK Investment Management St. Petersburg, Florida $12.9B AUM 64.92% 1-Year Est. Return
NAMA
Nikko Asset Management Americas New York $7.07B AUM 50.91% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Jane Street's QSI Position: Q1 2026 in Review

Jane Street sold out of Quantum-Si Incorporated (QSI) in Q1 2026, closing a stake of 1,104,033 shares — an estimated $1.14M sold.

Jane Street first reported a position in QSI in Q1 2021 and held it in 16 quarters. The position peaked at $2.27M in Q3 2025. 156 funds tracked by Wall St. Rank hold QSI as of Q1 2026.

  • Jane Street reported no remaining Quantum-Si Incorporated position as of Q1 2026 after selling out during the quarter.
  • Jane Street sold 1,104,033 Quantum-Si Incorporated shares in Q1 2026, an estimated $1.14M.
  • Jane Street first reported a position in Quantum-Si Incorporated in Q1 2021 and held it in 16 quarters.
  • Jane Street's Quantum-Si Incorporated position peaked at $2.27M in Q3 2025.
  • 156 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.