QUMS · Quantumsphere Acquisition Corp · Shareholders & Ownership
Substantial doubt about the company's ability to continue as a going concern.
“The Company lacks the financial resources it needs to sustain operations for a reasonable period of time, which is considered to be one year from the date of the issuance of the financial statements. Therefore, management has determined that these conditions raise substantial doubt about the Company's ability to continue as a going concern until the earlier of the consummation of the Business Combination or the date the Company is required to liquidate.”View the 10-Q filed Aug 14, 2026
Every disclosed holder of QUMS in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns QUMS
13F quarter Jun 30, 2026No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 14,583,203 | 127.85% |
| Insiders (Forms 3, 4, 5) | 6,253,300 | 54.82% |
| 13D/G-only blocks | 718,086 | 6.30% |
| Remaining | 10,147,939 | -88.97% |
| Registered funds (N-PORT, not summed) | 216,336 | 1.90% |
Shares outstanding: 11,406,650, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of QUMS
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
|
3,126,650 | ||
| 1.1 |
|
3,126,650 | ||
| 2 |
|
3,126,650 | ||
| 3 |
Harraden Circle Investments, LLC
13F
CIK 1910592 · Registered investment adviser · Jun 30, 2026
|
993,926 | ||
| 4 |
|
905,510 | ||
| 4.1 |
BERKLEY W R CORP
13G
CIK 11544 · Insurance company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
881,402 | ||
| 5 |
Shaolin Capital Management LLC
13F
CIK 1766806 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
885,140 | ||
| 6 |
RIVERNORTH CAPITAL MANAGEMENT, LLC
13F
CIK 1447578 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
848,636 | ||
| 7 |
GLAZER CAPITAL, LLC
13F
CIK 1076809 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR, QUMSU
|
820,846 | ||
| 8 |
|
817,905 | ||
| 9 |
Linden Advisors LP
13F
CIK 1279396 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
800,000 | ||
| 10 |
Polar Asset Management Partners Inc.
13F
CIK 1326389 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
800,000 | ||
| 11 |
MIZUHO SECURITIES USA LLC
13F
CIK 812291 · Unknown · Jun 30, 2026
|
757,023 | ||
| 12 |
Mizuho Financial Group, Inc.
13G
CIK 1335730 · Bank · Dec 31, 2025
Rule 13d-1(b), qualified institution
|
718,086 | ||
| 13 |
HIGHBRIDGE CAPITAL MANAGEMENT LLC
13F
CIK 919185 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
684,923 | ||
| 14 |
AQR Arbitrage LLC
13F
CIK 1167456 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
636,771 | ||
| 15 |
|
534,860 | ||
| 16 |
Karpus Management, Inc.
13F
CIK 1048703 · Investment adviser · Jun 30, 2026
|
469,875 | ||
| 17 |
Westchester Capital Management, LLC
13F
CIK 1512805 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
450,000 | ||
| 18 |
|
434,900 | ||
| 19 |
|
410,315 | ||
| 20 |
Hudson Bay Capital Management LP
13F
CIK 1393825 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
385,000 | ||
| 21 |
Cable Car Capital, LP
13F
CIK 1699575 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
349,602 | ||
| 22 |
WOLVERINE ASSET MANAGEMENT LLC
13G
CIK 1279891 · Registered investment adviser · Sep 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
335,957 | ||
| 22.1 |
WOLVERINE ASSET MANAGEMENT LLC
13F
CIK 1279891 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
735,536 | ||
| 23 |
HGC Investment Management Inc.
13F
CIK 1711200 · Non-US institution · Jun 30, 2026
|
300,000 | ||
| 24 |
Radcliffe Capital Management, L.P.
13F
CIK 1218275 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
300,000 | ||
| 25 |
|
256,968 | ||
| 26 |
|
217,388 | ||
| 27 |
Periscope Capital Inc.
13F
CIK 1695320 · Exempt reporting adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
200,000 | ||
| 28 |
Schonfeld Strategic Advisors LLC
13F
CIK 1665241 · Registered investment adviser · Jun 30, 2026
Classes QUMS, QUMSR
|
109,200 | ||
| 29 |
Crossingbridge Advisors, LLC
13F
CIK 1770024 · Investment adviser · Jun 30, 2026
|
107,825 | ||
| 30 |
BOOTHBAY FUND MANAGEMENT, LLC
13F
CIK 1549230 · Registered investment adviser · Jun 30, 2026
|
100,000 | ||
| 31 |
First Trust Alternative Opportunities Fund
Fund
· Registered fund · Jun 30, 2026
First Trust Alternative Opportunities Fund, not summed
|
100,000 | ||
| 31.1 |
RiverNorth Opportunities Fund Inc.
Fund
· Registered fund · Jun 30, 2026
RIVERNORTH OPPORTUNITIES FUND INC., not summed
|
100,000 | ||
| 32 |
Quarry LP
13F
CIK 1965207 · Unknown · Jun 30, 2026
|
75,000 | ||
| 33 |
GABELLI & Co INVESTMENT ADVISERS, INC.
13F
CIK 932724 · Registered investment adviser · Jun 30, 2026
|
67,700 | ||
| 34 |
GABELLI FUNDS LLC
13F
CIK 1081407 · Registered investment adviser · Jun 30, 2026
|
57,300 | ||
| 35 |
HRT FINANCIAL LP
13F
CIK 1475597 · Unknown · Jun 30, 2026
|
30,000 | ||
| 36 |
|
16,506 | ||
| 37 |
Logan Stone Capital, LLC
13F
CIK 1535521 · Registered investment adviser · Jun 30, 2026
|
14,495 | ||
| 38 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
|
10,000 | ||
| 39 |
Rivernorth Enhanced Pre-Merger SPAC ETF
Fund
S000092118 · Registered fund · Jun 30, 2026
Elevation Series Trust, not summed
|
9,124 | ||
| 40 |
Global Multi-Strategy Fund
Fund
S000033960 · Registered fund · May 31, 2026
Principal Funds, Inc, not summed
|
7,212 | ||
| 41 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
|
53 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.