Clear Street’s Quantumsphere Acquisition Corp Units QUMSU Stock Holding History

Clear Street’s Portfolio QUMSU Stock Details QUMSU Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$239K	Buy	23,142 +682	+3%	+$7.06K	﹤0.01%	698
2026 Q1	$232K	Buy	22,460 +7,594	+51%	+$77.5K	﹤0.01%	534
2025 Q4	$151K	Sell	14,866 -203,191	-93%	-$2.07M	﹤0.01%	472
2025 Q3	$2.21M	Buy	+218,057	New	+$2.19M	0.01%	166

Other funds holding QUMSU

GCIA

Gabelli & Co Investment Advisers Rye, New York $688M AUM 63.4% 1-Year Est. Return

Gabelli Funds Rye, New York $15.7B AUM 36.4% 1-Year Est. Return

HRT Financial New York $54.8B AUM 81.03% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Clear Street's QUMSU Position: Q2 2026 in Review

Clear Street increased its Quantumsphere Acquisition Corp Units (QUMSU) stake by 3% in Q2 2026, buying an estimated $7.06K and bringing the position to 23,142 shares worth $239K. The position accounts for ﹤0.01% of the portfolio, ranked #698.

Clear Street first reported a position in QUMSU in Q3 2025 and has held it in 4 quarters since. The position peaked at $2.21M in Q3 2025. 6 funds tracked by Wall St. Rank hold QUMSU as of Q2 2026.

Clear Street held 23,142 shares of Quantumsphere Acquisition Corp Units worth $239K as of Q2 2026.
Clear Street bought 682 Quantumsphere Acquisition Corp Units shares in Q2 2026, an estimated $7.06K.
Quantumsphere Acquisition Corp Units made up ﹤0.01% of Clear Street's portfolio in Q2 2026, its #698 holding.
Clear Street first reported a position in Quantumsphere Acquisition Corp Units in Q3 2025 and has held it in 4 quarters since.
Clear Street's Quantumsphere Acquisition Corp Units position peaked at $2.21M in Q3 2025.
6 funds tracked by Wall St. Rank held Quantumsphere Acquisition Corp Units as of Q2 2026.

Based on Clear Street's 13F filing for Q2 2026, filed 12 Aug 2026.