QUMSR QUANTUMSPHERE ACQUISITION CO
FollowRIGHT 08/06/2030 (warrant or right), issuer CIK 2070900
23 managers (23 13F filers) reported a position in QUMSR shares at 2025-12-31, 5,874,623 shares in all. 19 filers opened a position and 1 filer sold out during the quarter.
- Managers
- 23
- 13F filers
- 23
- New
- 19
- Added
- 2
- Reduced
- 2
- Sold out
- 1
- Shares held by filers
- 5,874,623
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, Q4 2025
Filers in the available 13F reports with a share position at 2025-12-31, 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 |
|---|---|---|---|---|---|
| Harraden Circle Investments, LLCin group Harraden Circle Investments, … | 993,926 | $209K | 0.04% | +826,426 | 13F-HRTimelineGroup |
| TORONTO DOMINION BANKin group TORONTO DOMINION BANK | 695,137 | $146K | <0.01% | +645,137 | 13F-HRTimelineGroup |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 684,037 | $144K | 0.01% | -15,963 | 13F-HRTimeline |
| Shaolin Capital Management LLC | 460,000 | $96.6K | <0.01% | new | 13F-HRTimeline |
| GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC | 420,536 | $88K | <0.01% | new | 13F-HRTimelineGroup |
| Linden Advisors LPin group Linden Advisors LP | 400,000 | $88K | <0.01% | new | 13F-HRTimelineGroup |
| AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC | 322,660 | $64.6K | <0.01% | new | 13F-HRTimelineGroup |
| HGC Investment Management Inc. | 300,000 | $63K | 0.01% | new | 13F-HRTimeline |
| Clear Street Group Inc.in group Clear Street Group Inc. | 229,252 | $48.2K | <0.01% | new | 13F-HRTimelineGroup |
| Cable Car Capital, LP | 174,801 | $36.7K | <0.01% | new | 13F-HRTimeline |
| Radcliffe Capital Management, L.P. | 150,000 | $33K | <0.01% | new | 13F-HRTimeline |
| WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC | 150,000 | $31.5K | <0.01% | new | 13F-HRTimelineGroup |
| Hudson Bay Capital Management LPin group Hudson Bay Capital Management… | 150,000 | $31.5K | <0.01% | -85,000 | 13F-HRTimelineGroup |
| HEIGHTS CAPITAL MANAGEMENT, INCin group HEIGHTS CAPITAL MANAGEMENT, I… | 149,900 | $31.5K | 0.01% | new | 13F-HRTimelineGroup |
| D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc. | 125,000 | $26.3K | <0.01% | new | 13F-HRTimelineGroup |
| Periscope Capital Inc. | 125,000 | $26.3K | 0.01% | new | 13F-HRTimeline |
| BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS | 102,340 | $21.5K | <0.01% | new | 13F-HRTimelineGroup |
| BOOTHBAY FUND MANAGEMENT, LLC | 100,000 | $21K | <0.01% | new | 13F-HRTimeline |
| Schonfeld Strategic Advisors LLC | 54,599 | $11.5K | <0.01% | new | 13F-HRTimeline |
| Meteora Capital, LLC | 36,121 | $7.59K | <0.01% | new | 13F-HRTimeline |
| BERKLEY W R CORP | 35,110 | $7.38K | <0.01% | new | 13F-HRTimeline |
| UBS Group AGin group UBS Group AG | 16,104 | $3.38K | <0.01% | new | 13F-HRTimelineGroup |
| BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/ | 100 | $21 | <0.01% | new | 13F-HRTimelineGroup |