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Israel Englander’s Quantum-Si Incorporated QSI Stock Holding History

Israel Englander’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
Q2 		$2.77M Buy
+3,131,726
New +$2.98M ﹤0.01% 3550
2026
Q1 		– Sell
-191,791
Closed -$211K – 6261
2025
Q4 		$211K Sell
191,791
-2,478,168
-93% -$4.03M ﹤0.01% 5449
2025
Q3 		$3.76M Sell
2,669,959
-1,109,300
-29% -$1.6M ﹤0.01% 3430
2025
Q2 		$7.41M Sell
3,779,259
-155,026
-4% -$229K ﹤0.01% 2580
2025
Q1 		$4.72M Buy
+3,934,285
New +$7.54M ﹤0.01% 2919
2024
Q4 		– Sell
-150,865
Closed -$133K – 6374
2024
Q3 		$133K Sell
150,865
-223,862
-60% -$217K ﹤0.01% 5536
2024
Q2 		$393K Buy
374,727
+184,940
+97% +$296K ﹤0.01% 4747
2024
Q1 		$374K Buy
+189,787
New +$332K ﹤0.01% 4999
2023
Q2 		– Sell
-39,288
Closed -$69K – 6583
2023
Q1 		$69K Buy
39,288
+28,181
+254% +$55.6K ﹤0.01% 5538
2022
Q4 		$20K Buy
+11,107
New +$28.6K ﹤0.01% 6046
2022
Q2 		– Sell
-618,289
Closed -$2.89M – 7399
2022
Q1 		$2.89M Buy
+618,289
New +$3.01M ﹤0.01% 3528
2021
Q4 		– Sell
-208,722
Closed -$1.74M – 7272
2021
Q3 		$1.74M Sell
208,722
-2,541,278
-92% -$25M ﹤0.01% 4080
2021
Q2 		$33.2M Buy
2,750,000
+2,685,904
+4,190% +$28.1M 0.02% 827
2021
Q1 		$764K Buy
+64,096
New +$775K ﹤0.01% 4463

Other funds holding QSI

Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AIM
ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
NAMA
Nikko Asset Management Americas New York $7.75B AUM 33.73% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return

Israel Englander's QSI Position: Q2 2026 in Review

Israel Englander opened a new position in Quantum-Si Incorporated (QSI) in Q2 2026: 3,131,726 shares worth $2.77M. The stake represents ﹤0.01% of the portfolio and ranks #3550 among its holdings. This is a return to the name: Israel Englander previously reported a position in QSI as recently as Q4 2025.

Israel Englander first reported a position in QSI in Q1 2021 and has held it in 14 quarters since. The position peaked at $33.2M in Q2 2021. 140 funds tracked by Wall St. Rank hold QSI as of Q2 2026.

  • Israel Englander held 3,131,726 shares of Quantum-Si Incorporated worth $2.77M as of Q2 2026.
  • Quantum-Si Incorporated was a new Israel Englander position in Q2 2026.
  • Quantum-Si Incorporated made up ﹤0.01% of Israel Englander's portfolio in Q2 2026, its #3550 holding.
  • Israel Englander first reported a position in Quantum-Si Incorporated in Q1 2021 and has held it in 14 quarters since.
  • Israel Englander's Quantum-Si Incorporated position peaked at $33.2M in Q2 2021.
  • 140 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q2 2026.

Based on Millennium Management's 13F filing for Q2 2026, filed 14 Aug 2026.