Atom Investors’s Quantum-Si Incorporated QSI Stock Holding History

Atom Investors’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	-21,995	Closed	-$24.2K	–	807
2025 Q4	$24.2K	Buy	+21,995	New	+$35.8K	﹤0.01%	554
2025 Q3	–	Sell	-20,803	Closed	-$40.8K	–	774
2025 Q2	$40.8K	Sell	20,803 -9,369	-31%	-$13.9K	﹤0.01%	578
2025 Q1	$36.2K	Buy	+30,172	New	+$57.8K	﹤0.01%	480

Other funds holding QSI

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 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 $2.9T AUM 29.55% 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

Atom Investors's QSI Position: Q1 2026 in Review

Atom Investors sold out of Quantum-Si Incorporated (QSI) in Q1 2026, closing a stake of 21,995 shares — an estimated $24.2K sold.

Atom Investors first reported a position in QSI in Q1 2025 and held it in 3 quarters. The position peaked at $40.8K in Q2 2025. 156 funds tracked by Wall St. Rank hold QSI as of Q1 2026.

Atom Investors reported no remaining Quantum-Si Incorporated position as of Q1 2026 after selling out during the quarter.
Atom Investors sold 21,995 Quantum-Si Incorporated shares in Q1 2026, an estimated $24.2K.
Atom Investors first reported a position in Quantum-Si Incorporated in Q1 2025 and held it in 3 quarters.
Atom Investors's Quantum-Si Incorporated position peaked at $40.8K in Q2 2025.
156 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q1 2026.

Based on Atom Investors's 13F filing for Q1 2026, filed 15 May 2026.