Gabelli Funds’s Quantumsphere Acquisition Corp Units QUMSU Stock Holding History

Gabelli Funds’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	$592K	Hold	57,300	–	–	﹤0.01%	1031
2026 Q1	$591K	Hold	57,300	–	–	﹤0.01%	1008
2025 Q4	$583K	Hold	57,300	–	–	﹤0.01%	1014
2025 Q3	$580K	Buy	+57,300	New	+$576K	﹤0.01%	1025

Other funds holding QUMSU

GCIA

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

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

Clear Street New York $39.5B AUM 124.03% 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

Gabelli Funds's QUMSU Position: Q2 2026 in Review

Gabelli Funds held its Quantumsphere Acquisition Corp Units (QUMSU) position steady in Q2 2026 at 57,300 shares worth $592K. The position accounts for ﹤0.01% of the portfolio, ranked #1031.

Gabelli Funds first reported a position in QUMSU in Q3 2025 and has held it in 4 quarters since. 6 funds tracked by Wall St. Rank hold QUMSU as of Q2 2026.

Gabelli Funds held 57,300 shares of Quantumsphere Acquisition Corp Units worth $592K as of Q2 2026.
Gabelli Funds left its Quantumsphere Acquisition Corp Units share count unchanged in Q2 2026.
Quantumsphere Acquisition Corp Units made up ﹤0.01% of Gabelli Funds's portfolio in Q2 2026, its #1031 holding.
Gabelli Funds first reported a position in Quantumsphere Acquisition Corp Units in Q3 2025 and has held it in 4 quarters since.
6 funds tracked by Wall St. Rank held Quantumsphere Acquisition Corp Units as of Q2 2026.

Based on Gabelli Funds's 13F filing for Q2 2026, filed 12 Aug 2026.