Quantumsphere Acquisition Ownership | Who Owns Quantumsphere Acquisition?

Quantumsphere Acquisition Ownership Summary

Quantumsphere Acquisition is owned by 36.89% institutional investors, and 63.11% retail investors. Mizuho securities usa is the largest institutional shareholder, holding 8.84% of QUMS shares. Westchester Merger Arbitrage Composite is the top mutual fund, with 1.81% of its assets in Quantumsphere Acquisition shares.

QUMS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Quantumsphere Acquisition	36.89%	-	63.11%
Industry	Shell Companies Stocks	2779.39%	19.92%	-2699.31%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Mizuho securities usa	731.98K	8.84%	$7.36M
Wolverine asset management	603.98K	7.29%	$6.11M
Berkley w r	508.54K	6.14%	$5.15M
Karpus management	493.88K	5.96%	$5.00M
Shaolin capital management	480.00K	5.80%	$4.86M
Rivernorth capital management	424.51K	5.13%	$4.30M
Glazer capital	423.02K	5.11%	$4.28M
D. e. shaw	409.86K	4.95%	$4.15M
Linden advisors lp	400.00K	4.83%	$4.05M
Polar asset management partners	400.00K	4.83%	$4.05M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Hgc investment management	300.00K	0.67%	$3.04M
Cable car capital	174.80K	0.61%	$1.77M
Rlh capital	100.00K	0.51%	$1.01M
Heights capital management	150.00K	0.42%	$1.52M
Berkley w r	508.54K	0.28%	$5.15M
Rivernorth capital management	424.51K	0.21%	$4.30M
Crossingbridge advisors	107.83K	0.20%	$1.09M
Shaolin capital management	480.00K	0.18%	$4.86M
Mizuho securities usa	731.98K	0.17%	$7.36M
Karpus management	493.88K	0.16%	$5.00M

Top Buyers

Holder	Shares	% Assets	Change
Rivernorth capital management	424.51K	0.21%	424.51K
Polar asset management partners	400.00K	0.08%	400.00K
Berkley w r	508.54K	0.28%	204.96K
Jpmorgan chase	121.08K	0.00%	121.08K
Highbridge capital management	121.08K	0.04%	121.08K

Top Sellers

Holder	Shares	% Assets	Change
Clear street group	175.00K	0.01%	-249.76K
Two sigma investments, lp	35.29K	0.00%	-182.19K
Warberg asset management	-	-	-41.42K
Periscope capital	100.00K	0.11%	-25.00K
Aqr arbitrage	308.29K	0.05%	-14.37K

New Positions

Holder	Shares	% Assets	Change	Value
Rivernorth capital management	424.51K	0.21%	424.51K	$4.30M
Polar asset management partners	400.00K	0.08%	400.00K	$4.05M
Jpmorgan chase	121.08K	0.00%	121.08K	$1.23M
Crossingbridge advisors	107.83K	0.20%	107.83K	$1.09M
Rlh capital	100.00K	0.51%	100.00K	$1.01M

Sold Out

Holder	Change
Warberg asset management	-41.42K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	11	-56.00%	3,054,116	-53.51%	36	0.59%	6	-75.00%	4	-
Dec 31, 2025	25	525.00%	6,568,805	671.59%	79	25.85%	24	500.00%	-	-
Sep 30, 2025	4	-	851,333	-	17	-	4	-	-	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Westchester Merger Arbitrage Composite	206.08K	1.81%	206.08K
The Merger Fund A	206.08K	1.81%	206.08K
Karpus Conservative Balanced	94.38K	0.83%	94.38K
Karpus Tax Sensitive Fixed Income	69.90K	0.61%	69.90K
Karpus Taxable Fixed Income	62.83K	0.55%	62.83K
Karpus Growth Balanced	31.85K	0.28%	31.85K
AQR Corp Abtg IAU1F USD Acc	12.71K	0.11%	12.71K
JNL Multi-Manager Alternative A	11.42K	0.10%	-
Virtus Westchester Event-Driven Fd I	11.06K	0.10%	11.06K
Westchester Event Driven Composite	11.06K	0.10%	11.06K

QUMS Ownership FAQ

Who Owns Quantumsphere Acquisition?

Quantumsphere Acquisition shareholders are primarily institutional investors at 36.89%, followed by 0% insiders and 0% retail investors. The average institutional ownership in Quantumsphere Acquisition's industry, Shell Companies Stocks , is 2779.39%, which Quantumsphere Acquisition falls below.

Who owns the most shares of Quantumsphere Acquisition?

Quantumsphere Acquisition’s largest shareholders are Mizuho securities usa (731.98K shares, 8.84%), Wolverine asset management (603.98K shares, 7.29%), and Berkley w r (508.54K shares, 6.14%). Together, they hold 22.28% of Quantumsphere Acquisition’s total shares outstanding.

Does Blackrock own Quantumsphere Acquisition?

BlackRock is not among the top 10 institutional shareholders of Quantumsphere Acquisition.

Who is Quantumsphere Acquisition’s biggest shareholder by percentage of total assets invested?

Hgc investment management is Quantumsphere Acquisition’s biggest shareholder by percentage of total assets invested, with 0.67% of its assets in 300K Quantumsphere Acquisition shares, valued at 3.04M$.

Who is the top mutual fund holder of Quantumsphere Acquisition shares?

Westchester Merger Arbitrage Composite is the top mutual fund holder of Quantumsphere Acquisition shares, with 1.81% of its total shares outstanding invested in 206.08K Quantumsphere Acquisition shares.

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