Who Owns Quantumsphere Acquisition Corp. Ordinary Shares (QUMS)?Hedge Fund & Institutional Holders

$10.12+0.02 (+0.20%)Financial ServicesNASDAQ

Institutional Holders

50

as of Q4 2025

Total Institutional Value

$7.000000575700048e+245T

% of Float Held

—

QoQ Change in Holders

+6 / -2

Price History

$9.93$9.97$10.02$10.06$10.11Sep 25Jan 26Mar 26

QUMS — Biggest New Institutional Buyers This Quarter

FundActionShares AddedValue Added
MIZUHO SECURITIES USA LLCNew Position+718K+$7.0B
WOLVERINE ASSET MANAGEMENT LLCNew Position+725K+$5.8B
Shaolin Capital Management LLCNew Position+940K+$4.9B
D. E. Shaw & Co., Inc.Increased+410K+$2.7B
Westchester Capital Management, LLCIncreased+250K+$2.5B
Clear Street Group Inc.Increased+449K+$1.8B
BERKLEY W R CORPIncreased+190K+$1.5B
HEIGHTS CAPITAL MANAGEMENT, INCNew Position+300K+$1.5B
Logan Stone Capital, LLCNew Position+15K+$145.0M
LINDEN ADVISORS LPIncreased+400K+$40.0M
HGC Investment Management Inc.Increased+300K+$27.0M
AQR Arbitrage LLCIncreased+323K+$24.5M
Radcliffe Capital Management, L.P.Increased+150K+$14.5M
Cable Car Capital, LPIncreased+175K+$14.3M
UBS Group AGNew Position+17K+$7.0M

QUMS — Institutions Reducing or Closing Positions

FundActionShares SoldValue Sold
HIGHBRIDGE CAPITAL MANAGEMENT LLCDecreased-616K-$6.0B
Hudson Bay Capital Management LPDecreased-85K-$2.4B
METEORA CAPITAL, LLCDecreased-194K-$2.3B
StoneX Group Inc.Closed Position-168K-$1.7B
ATW SPAC MANAGEMENT LLCClosed Position-100K-$1.0B
TWO SIGMA INVESTMENTS, LPDecreased-5K-$253.8M
RIVERNORTH CAPITAL MANAGEMENT, LLCDecreased-488-$-15.8M

Top Institutional Holders(Q4 2025)

#FundSharesValue% of PortfolioType
1MIZUHO SECURITIES USA LLC718,086$7.0B115.72%Share
2WOLVERINE ASSET MANAGEMENT LLC575,222$5.8B45.38%Share
3Shaolin Capital Management LLC480,000$4.8B0.15%Share
4RIVERNORTH CAPITAL MANAGEMENT, LLC424,512$4.3B0.20%Share
5LINDEN ADVISORS LP400,000$4.0B24.65%Share
6Polar Asset Management Partners Inc.400,000$4.0B50.75%Share
7D. E. Shaw & Co., Inc.409,860$4.0B2.19%Share
8Clear Street Group Inc.424,762$4.0B14.85%Share
9AQR Arbitrage LLC322,660$3.2B0.07%Share
10BERKLEY W R CORP303,580$3.0B0.14%Share
11HGC Investment Management Inc.300,000$3.0B0.64%Share
12Westchester Capital Management, LLC227,168$2.3B0.10%Share
13TWO SIGMA INVESTMENTS, LP217,479$2.0B2.82%Share
14Cable Car Capital, LP174,801$1.7B0.06%Share
15HEIGHTS CAPITAL MANAGEMENT, INC150,000$1.5B0.54%Share
16Radcliffe Capital Management, L.P.150,000$1.5B0.08%Share
17TORONTO DOMINION BANK175,778$1.0B1.48%Share
18Westchester Capital Management, LLC90,801$924.0M0.04%Share
19Warberg Asset Management LLC41,421$414.0M0.05%Share
20Harraden Circle Investments, LLC993,926$208.0M0.04%Share
21Westchester Capital Management, LLC20,576$205.0M0.01%Share
22Logan Stone Capital, LLC14,500$145.0M0.04%Share
23HIGHBRIDGE CAPITAL MANAGEMENT LLC684,037$143.0M0.00%Share
24Shaolin Capital Management LLC460,000$96.0M0.00%Share
25LINDEN ADVISORS LP400,000$88.0M0.54%Share
26Westchester Capital Management, LLC8,262$84.0M0.00%Share
27AQR Arbitrage LLC322,660$64.0M0.00%Share
28HGC Investment Management Inc.300,000$63.0M0.01%Share
29Cable Car Capital, LP174,801$36.0M0.00%Share
30Radcliffe Capital Management, L.P.150,000$33.0M0.00%Share
31WOLVERINE ASSET MANAGEMENT LLC150,000$31.0M0.24%Share
32HEIGHTS CAPITAL MANAGEMENT, INC149,900$31.0M0.01%Share
33Westchester Capital Management, LLC2,256$22.0M0.00%Share
34Westchester Capital Management, LLC937$9.0M0.00%Share
35BERKLEY W R CORP35,110$7.0M0.00%Share
36METEORA CAPITAL, LLC36,121$7.0M0.00%Share
37GLAZER CAPITAL, LLC424,153$4.2M0.11%Share
38UBS Group AG459$4.0M0.00%Share
39UBS Group AG16,104$3.0M0.00%Share
40PERISCOPE CAPITAL INC.125,000$1.3M0.14%Share
41BNP PARIBAS FINANCIAL MARKETS102,340$1.0M0.00%Share
42GABELLI & Co INVESTMENT ADVISERS, INC.67,700$689K0.10%Share
43Schonfeld Strategic Advisors LLC55,000$550K0.00%Share
44Virtu Financial LLC24,783$248K0.01%Share
45GLAZER CAPITAL, LLC420,536$88K0.00%Share
46PERISCOPE CAPITAL INC.125,000$26K0.00%Share
47Schonfeld Strategic Advisors LLC54,599$11K0.00%Share
48Hudson Bay Capital Management LP235,000$2K0.00%Share
49JPMORGAN CHASE & CO10,000$00.00%Share
50GABELLI FUNDS LLC57,300$00.00%Share

QUMS Institutional Ownership History

QuarterHoldersTotal ValueChange
Q4 202536$59.8B+6
Q3 202530$54.6B—

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As of Q4 2025, 50 institutional investors hold QUMS (Quantumsphere Acquisition Corp. Ordinary Shares). The largest holder is MIZUHO SECURITIES USA LLC with $7.0B in shares. This quarter, 6 institutions opened new positions and 2 closed their positions.

Frequently Asked Questions

How many hedge funds own QUMS?

As of Q4 2025, 50 institutional investors report holding QUMS (Quantumsphere Acquisition Corp. Ordinary Shares) in their 13F filings.

Who is the largest institutional holder of QUMS?

The largest institutional holder of QUMS is MIZUHO SECURITIES USA LLC with $7.0B in shares.

Is institutional ownership of QUMS increasing or decreasing?

This quarter, 6 institutions opened new positions in QUMS and 2 closed their positions.