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QUMS QUANTUMSPHERE ACQUISITION CO

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ORD SHS (common), issuer CIK 2070900

25 managers (25 13F filers) reported a position in QUMS shares at 2025-12-31, 6,568,805 shares in all. 22 filers opened a position and 1 filer sold out during the quarter.

Managers
25
13F filers
25
New
22
Added
2
Reduced
0
Sold out
1
Shares held by filers
6,568,805

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

Each filer's latest stake. The shares are the aggregate the reporting persons state, which can include entities that file no 13F.

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.

HolderSharesValue% of portfolioChangeSource
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC718,086$7.13M0.12%new13F-HRTimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC575,222$5.76M0.08%new13F-HRTimelineGroup
Karpus Management, Inc.494,350$4.95M0.15%new13F-HR/ATimeline
Shaolin Capital Management LLC480,000$4.8M0.18%new13F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.424,762$4.25M0.02%+423,36313F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC424,153$4.25M0.11%new13F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.409,860$4.1M<0.01%new13F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP400,000$4M0.02%new13F-HRTimelineGroup
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC322,660$3.23M0.07%new13F-HRTimelineGroup
BERKLEY W R CORP303,580$3.04M0.17%new13F-HRTimeline
HGC Investment Management Inc.300,000$3M0.64%new13F-HRTimeline
Westchester Capital Management, LLCin group Westchester Capital Managemen…250,000$2.5M0.12%new13F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…235,000$2.35M0.01%013F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP217,479$2.18M<0.01%new13F-HRTimelineGroup
TORONTO DOMINION BANKin group TORONTO DOMINION BANK175,778$1.76M<0.01%new13F-HRTimelineGroup
Cable Car Capital, LP174,801$1.75M0.11%new13F-HRTimeline
HEIGHTS CAPITAL MANAGEMENT, INCin group HEIGHTS CAPITAL MANAGEMENT, I…150,000$1.5M0.57%new13F-HRTimelineGroup
Radcliffe Capital Management, L.P.150,000$1.5M0.08%new13F-HRTimeline
Periscope Capital Inc.125,000$1.25M0.24%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS102,340$1.02M<0.01%new13F-HRTimelineGroup
Schonfeld Strategic Advisors LLC55,000$551K<0.01%new13F-HRTimeline
Warberg Asset Management LLC41,421$415K0.12%new13F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC24,783$248K0.01%+9,84913F-HRTimelineGroup
Logan Stone Capital, LLC14,500$145K0.04%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY30$300<0.01%new13F-HR/ATimelineGroup

Events

  • WOLVERINE ASSET MANAGEMENT LLC and 3 other reporting persons reported 335,957 QUMS shares, 2.95% of the class, as of 2026-09-30, in a 13G/A filed 2026-10-06. 0001140361-26-038779

    Accepted , ingested