Jim Simons’s Quantum-Si Incorporated QSI Stock Holding History

Jim Simons’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	$91.3K	Buy	+117,900	New	+$122K	﹤0.01%	3043
2025 Q3	–	Sell	-89,200	Closed	-$175K	–	3828
2025 Q2	$175K	Sell	89,200 -782,556	-90%	-$1.16M	﹤0.01%	3197
2025 Q1	$1.05M	Buy	871,756 +326,800	+60%	+$626K	﹤0.01%	2396
2024 Q4	$1.47M	Buy	544,956 +503,400	+1,211%	+$590K	﹤0.01%	2257
2024 Q3	$36.7K	Buy	+41,556	New	+$40.3K	﹤0.01%	3380
2023 Q3	–	Sell	-223,256	Closed	-$400K	–	4019
2023 Q2	$400K	Buy	223,256 +110,400	+98%	+$173K	﹤0.01%	2989
2023 Q1	$199K	Buy	112,856 +75,300	+201%	+$149K	﹤0.01%	3287
2022 Q4	$69K	Buy	+37,556	New	+$96.8K	﹤0.01%	3724

Other funds holding QSI

BlackRock New York $6.73T AUM 46.02% 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 Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Jim Simons's QSI Position: Q1 2026 in Review

Jim Simons opened a new position in Quantum-Si Incorporated (QSI) in Q1 2026: 117,900 shares worth $91.3K. The stake represents ﹤0.01% of the portfolio and ranks #3043 among its holdings. This is a return to the name: Jim Simons previously reported a position in QSI as recently as Q2 2025.

Jim Simons first reported a position in QSI in Q4 2022 and has held it in 8 quarters since. The position peaked at $1.47M in Q4 2024. 157 funds tracked by Wall St. Rank hold QSI as of Q1 2026.

Jim Simons held 117,900 shares of Quantum-Si Incorporated worth $91.3K as of Q1 2026.
Quantum-Si Incorporated was a new Jim Simons position in Q1 2026.
Quantum-Si Incorporated made up ﹤0.01% of Jim Simons's portfolio in Q1 2026, its #3043 holding.
Jim Simons first reported a position in Quantum-Si Incorporated in Q4 2022 and has held it in 8 quarters since.
Jim Simons's Quantum-Si Incorporated position peaked at $1.47M in Q4 2024.
157 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.