Belvedere Trading’s Quantum-Si Incorporated QSI Stock Holding History

Belvedere Trading’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
2025 Q4	–	Sell	-1,390	Closed	-$2.26K	–	1024
2025 Q3	$1.96K	Sell	1,390 -5,832	-81%	-$8.43K	﹤0.01%	857
2025 Q2	$14.2K	Buy	+7,222	New	+$10.7K	﹤0.01%	698
2025 Q1	–	Sell	-41,053	Closed	-$111K	–	917
2024 Q4	$111K	Buy	+41,053	New	+$48.1K	﹤0.01%	498
2021 Q3	–	Sell	-4,406	Closed	-$54K	–	574
2021 Q2	$54K	Buy	4,406 +2,150	+95%	+$22.5K	﹤0.01%	300
2021 Q1	$27K	Buy	+2,256	New	+$27.3K	﹤0.01%	242

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 $154B AUM 29.96% 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

Belvedere Trading's QSI Position: Q4 2025 in Review

Belvedere Trading sold out of Quantum-Si Incorporated (QSI) in Q4 2025, closing a stake of 1,390 shares — an estimated $2.26K sold.

Belvedere Trading first reported a position in QSI in Q1 2021 and held it in 5 quarters. The position peaked at $111K in Q4 2024. 135 funds tracked by Wall St. Rank hold QSI as of Q4 2025.

Belvedere Trading reported no remaining Quantum-Si Incorporated position as of Q4 2025 after selling out during the quarter.
Belvedere Trading sold 1,390 Quantum-Si Incorporated shares in Q4 2025, an estimated $2.26K.
Belvedere Trading first reported a position in Quantum-Si Incorporated in Q1 2021 and held it in 5 quarters.
Belvedere Trading's Quantum-Si Incorporated position peaked at $111K in Q4 2024.
135 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q4 2025.

Based on Belvedere Trading's 13F filing for Q4 2025, filed 10 Feb 2026.