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QUMS QUANTUMSPHERE ACQUISITION CO

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ORD SHS (common), issuer CIK 2070900

27 managers (27 13F filers) reported a position in QUMS shares at 2026-06-30, 7,858,263 shares in all. 1 filer opened a position and 3 filers sold out during the quarter.

Managers
27
13F filers
27
New
1
Added
6
Reduced
10
Sold out
3
Shares held by filers
7,858,263

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, 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.

HolderSharesValue% of portfolioChangeSource
BERKLEY W R CORP881,402$9.01M0.44%+372,86213F-HRTimeline
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC757,023$7.68M0.12%+25,03913F-HR/ATimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC602,984$6.16M0.08%-1,00013F-HRTimelineGroup
Karpus Management, Inc.469,875$4.8M0.14%-24,00013F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC424,124$4.37M0.21%-38813F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.409,860$4.19M<0.01%013F-HRTimelineGroup
Shaolin Capital Management LLC405,761$4.15M0.24%-74,23913F-HRTimeline
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC400,089$4.09M0.1%-22,93013F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP400,000$4.09M0.02%013F-HRTimelineGroup
Polar Asset Management Partners Inc.400,000$4.09M0.07%013F-HRTimeline
HIGHBRIDGE CAPITAL MANAGEMENT LLC377,607$3.87M0.13%+256,52913F-HRTimeline
Westchester Capital Management, LLCin group Westchester Capital Managemen…350,000$3.58M0.18%+100,00013F-HRTimelineGroup
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC312,523$3.19M0.05%+4,22913F-HRTimelineGroup
RLH Capital LLC250,000$2.56M1.22%+150,00013F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…235,000$2.4M0.01%013F-HRTimelineGroup
Cable Car Capital, LP174,801$1.79M0.04%013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.164,793$1.68M0.01%-10,20813F-HRTimelineGroup
HEIGHTS CAPITAL MANAGEMENT, INCin group HEIGHTS CAPITAL MANAGEMENT, I…150,000$1.53M0.35%013F-HRTimelineGroup
Radcliffe Capital Management, L.P.150,000$1.53M0.12%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS115,048$1.18M<0.01%013F-HRTimelineGroup
Crossingbridge Advisors, LLC107,825$1.1M0.19%013F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK100,000$1.02M<0.01%-165,60013F-HRTimelineGroup
Periscope Capital Inc.75,000$766K0.12%-25,00013F-HRTimeline
Quarry LP75,000$766K0.12%new13F-HRTimeline
Schonfeld Strategic Advisors LLC55,000$562K<0.01%013F-HRTimeline
Logan Stone Capital, LLC14,495$148K0.03%-513F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY53$542<0.01%-1013F-HRTimelineGroup

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