13F

Stock

Quantumsphere Acquisition Co

Ticker not mapped · held by 29 managers

Reported value

$71.9M

Holders

29

+4 new · −1 exited

Holders’ est. mark

$625.6K

Price effect on 24 books still in the name

Largest holder

$7.36M

MIZUHO SECURITIES USA LLC

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
MIZUHO SECURITIES USA LLC732K$7.36M$87.8KAdded$227.5K
WOLVERINE ASSET MANAGEMENT LLC604K$6.11M$63.3KAdded$354.3K
BERKLEY W R CORP508.5K$5.15M$33.4KAdded$2.11M
Karpus Management, Inc.493.9K$5M$54.3KAdded$49.6K
Shaolin Capital Management LLC480K$4.86M$52.8KAdded$52.8K
RIVERNORTH CAPITAL MANAGEMENT, LLC424.5K$4.3MNew
D. E. Shaw & Co., Inc.409.9K$4.15M$45.1KAdded$45.1K
Polar Asset Management Partners Inc.400K$4.05MNew
Linden Advisors LP400K$4.05M$44KAdded$44K
AQR Arbitrage LLC308.3K$3.12M$33.9KCut−$109.9K
HGC Investment Management Inc.300K$3.04M$33KAdded$33K
TORONTO DOMINION BANK265.6K$2.69M$19.3KAdded$928.3K
Westchester Capital Management, LLC250K$2.53M$27.5KAdded$27.5K
Hudson Bay Capital Management LP235K$2.38M$25.8KAdded$25.9K
Clear Street Group Inc.175K$1.77M$19.2KCut−$2.48M
Cable Car Capital, LP174.8K$1.77M$19.2KAdded$19.2K
HEIGHTS CAPITAL MANAGEMENT, INC150K$1.52M$16.5KAdded$16.5K
Radcliffe Capital Management, L.P.150K$1.52M$16.5KAdded$16.5K
HIGHBRIDGE CAPITAL MANAGEMENT LLC121.1K$1.23MNew
BNP PARIBAS FINANCIAL MARKETS115K$1.16M$11.3KAdded$139.9K
Crossingbridge Advisors, LLC107.8K$1.09MNew
RLH Capital LLC100K$1.01MHeld
Periscope Capital Inc.100K$1.01M$11KCut−$239.3K
Schonfeld Strategic Advisors LLC55K$556.6K$6.05KAdded$6.05K
TWO SIGMA INVESTMENTS, LP35.3K$357.1K$3.88KCut−$1.82M
Logan Stone Capital, LLC14.5K$146.7K$1.59KAdded$1.59K
Glazer Capital, LLC423K$4.28K$46Added$35
MORGAN STANLEY63$638$4Added$338
Virtu Financial LLC22.3K$226$3Cut−$22

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.