Keystone AcquisitionKEYYU 13F holders, Q2 2026 (June 30) 29 holders
1 famous investor
$10.05 avg. 13F price*
At the end of Q2 2026 , 29 institutions reported holding Keystone Acquisition Corp. (KEYYU) in their 13F filings. The largest holders were Magnetar Financial LLC ($20.1M), AQR Arbitrage LLC ($17.3M) and LMR Partners LLP ($13.1M). One famous investor held it Israel Englander (0.0% of Millennium Management's portfolio).
Company Keystone Acquisition Corp.
CUSIP G52539114
Latest filing quarter Q2 2026
Total Exit/New Position Q2 2026 Institutions Total Value New Positions 29 $135.2M Exits 0 $0
Ownership 29 holders Portfolio Manager % of Holder's Portfolio Change Shares Value ▼ Magnetar Financial LLC 0.20% New 2,000,000 $20.1M AQR Arbitrage LLC 0.30% New 1,723,275 $17.3M LMR Partners LLP 0.12% New 1,300,000 $13.1M Healthcare of Ontario Pension Plan Trust Fund 0.02% New 1,250,000 $12.6M Alberta Investment Management Corp 0.05% New 800,000 $8.0M HGC Investment Management Inc. 1.60% New 800,000 $8.0M Fort Baker Capital Management LP 0.59% New 600,000 $6.0M BNP Paribas Financial Markets 0.00% New 526,725 $5.3M Millennium Management 0.00% New 500,000 $5.0M Radcliffe Capital Management, L.P. 0.52% New 499,900 $5.0M Centiva Capital, LP 0.14% New 425,000 $4.3M Picton Mahoney Asset Management 0.04% New 400,000 $4.0M Decagon Asset Management LLP 0.76% New 375,000 $3.8M Whitebox Advisors LLC 0.18% New 350,000 $3.5M Moore Capital Management, LP 0.07% New 300,000 $3.0M Lineage Point Capital LP 0.62% New 295,719 $3.0M Rivernorth Capital Management, LLC 0.10% New 200,000 $2.0M Calamos Advisors LLC 0.01% New 200,000 $2.0M Schonfeld Strategic Advisors LLC 0.01% New 200,000 $2.0M Toronto Dominion Bank 0.00% New 199,900 $2.0M Ghisallo Capital Management LLC 0.04% New 150,000 $1.5M Aristeia Capital, L.L.C. 0.05% New 144,062 $1.4M DLD Asset Management, LP 0.27% New 100,000 $1.0M Susquehanna International Group, LLP 0.00% New 40,000 $402K Abc Arbitrage SA 0.03% New 30,000 $301K HRT Financial LP 0.00% New 22,330 $224K Clear Street Group Inc. 0.00% New 20,553 $206K Longfellow Investment Management Co. LLC 0.02% New 8,642 $87K UBS Group AG 0.00% New 1,040 $10K
"% of holder's portfolio" is KEYYU's weight in each manager's 13F, not the share of Keystone Acquisition Corp. the manager owns.