QUMSU QUANTUMSPHERE ACQUISITION CO
FollowUNIT 07/30/2030 (unit), issuer CIK 2070900
6 managers (7 13F filers) reported a position in QUMSU shares at 2026-06-30, 188,842 shares in all. 0 filers opened a position and 1 filer sold out during the quarter.
- Managers
- 6
- 13F filers
- 7
- New
- 0
- Added
- 3
- Reduced
- 1
- Sold out
- 1
- Shares held by filers
- 188,842
Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.
13D and 13G filers
No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.
Insider trades
No Form 4 transaction on this security in the data.
13F holders, Q2 2026
Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.
| Holder | Shares | Value | % of portfolio | Change | Source |
|---|---|---|---|---|---|
| GAMCO Investors (Gabelli)group of 2 filers holding | 125,000 | $1.29M | 0 | Timeline
| |
| HRT FINANCIAL LP | 30,000 | $309K | <0.01% | -138 | 13F-HRTimeline |
| Clear Street Group Inc.in group Clear Street Group Inc. | 23,142 | $239K | <0.01% | +682 | 13F-HRTimelineGroup |
| JPMORGAN CHASE & COin group JPMORGAN CHASE & CO | 10,000 | $103K | <0.01% | 0 | 13F-HRTimelineGroup |
| UBS Group AGin group UBS Group AG | 479 | $4.95K | <0.01% | +15 | 13F-HRTimelineGroup |
| GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC | 221 | $2K | <0.01% | +2 | 13F-HRTimelineGroup |