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KEYYU KEYSTONE ACQUISITION CORP

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Unit (unit), issuer CIK 2102771

29 managers (29 13F filers) reported a position in KEYYU shares at 2026-06-30, 13,462,146 shares in all. 29 filers opened a position and 0 filers sold out during the quarter.

Managers
29
13F filers
29
New
29
Added
0
Reduced
0
Sold out
0
Shares held by filers
13,462,146

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.

HolderSharesValue% of portfolioChangeSource
Magnetar Financial LLCin group Magnetar Financial LLC2,000,000$20.1M0.18%new13F-HRTimelineGroup
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC1,723,275$17.3M0.25%new13F-HRTimelineGroup
LMR Partners LLPin group LMR Partners LLP1,300,000$13.1M0.1%new13F-HRTimelineGroup
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…1,250,000$12.6M0.02%new13F-HRTimeline
Alberta Investment Management Corp800,000$8.05M0.05%new13F-HRTimeline
HGC Investment Management Inc.800,000$8.03M1.59%new13F-HRTimeline
Fort Baker Capital Management LP600,000$6.02M0.48%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS526,725$5.29M<0.01%new13F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC500,000$5.02M<0.01%new13F-HRTimelineGroup
Radcliffe Capital Management, L.P.499,900$5.02M0.38%new13F-HRTimeline
Centiva Capital, LP425,000$4.27M0.14%new13F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT400,000$4.02M0.04%new13F-HRTimeline
Decagon Asset Management LLP375,000$3.77M0.75%new13F-HRTimeline
WHITEBOX ADVISORS LLC350,000$3.51M0.06%new13F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP300,000$3.01M0.07%new13F-HRTimeline
Lineage Point Capital LP295,719$2.97M0.61%new13F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC200,000$2.03M0.1%new13F-HRTimeline
Calamos Advisors LLCin group Calamos Advisors LLC200,000$2.02M0.01%new13F-HRTimelineGroup
Schonfeld Strategic Advisors LLC200,000$2.01M0.01%new13F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK199,900$2.01M<0.01%new13F-HRTimelineGroup
Ghisallo Capital Management LLC150,000$1.51M0.03%new13F-HRTimeline
ARISTEIA CAPITAL, L.L.C.144,062$1.45M0.02%new13F-HRTimeline
DLD Asset Management, LP100,000$1M0.08%new13F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…40,000$402K<0.01%new13F-HRTimelineGroup
ABC ARBITRAGE SAin group ABC ARBITRAGE SA30,000$301K0.03%new13F-HRTimelineGroup
HRT FINANCIAL LP22,330$224K<0.01%new13F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.20,553$206K<0.01%new13F-HRTimelineGroup
LONGFELLOW INVESTMENT MANAGEMENT CO LLC8,642$86.8K0.02%new13F-HRTimeline
UBS Group AGin group UBS Group AG1,040$10.4K<0.01%new13F-HRTimelineGroup