QUANTUMSPHERE ACQUISITION CO (QUMSU)
Institutional ownership reported to the SEC as of Q2 2026, across 4 quarters.
5
Reporting holders
$1.6M
Reported value
1.5%
Of shares outstanding
0.0%
Held as options
-1
Holder change
Institutions report 158,621 shares against 10,936,105 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| GABELLI & Co INVESTMENT ADVISERS, INC. | $699.3K | 67,700 | 0.10% | 4q | HELD |
| GABELLI FUNDS LLC | $591.9K | 57,300 | 0.00% | 4q | HELD |
| Clear Street Group Inc. | $239.1K | 23,142 | 0.00% | 4q | +3.0%+$7.0K |
| JPMORGAN CHASE & CO | $103.3K | 10,000 | 0.00% | 4q | HELD |
| UBS Group AG | $4.9K | 479 | 0.00% | 3q | +3.2% |
| HRT FINANCIAL LP | $309 | 30,000 | 0.00% | 4q | HELD |
| GLAZER CAPITAL, LLC | $2 | 221 | 0.00% | 2q | +0.9% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 5 | $1.6M | 158,621 | 0 | 2 | 0 | 0.0% |
| Q1 2026 | 6 | $2.6M | 257,924 | 0 | 2 | 0 | 0.0% |
| Q4 2025 | 8 | $10.9M | 1,074,837 | 1 | 0 | 2 | 0.0% |
| Q3 2025 | 28 | $52.2M | 5,157,880 | 27 | 0 | 0 | 0.0% |