Keystone Acquisition Corp. (NASDAQ:KEYYU) was held by 29 institutional investors that filed 13F reports for the quarter ended June 30, 2026.
| # | Institution | CIK | Shares Held | % of Outstanding | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|---|---|
| 1 | Magnetar Financial LLC | 0001352851 | 2,000,000 | — | ▲2,000,000 | 0.00% | $20.08Mn |
| 2 | AQR Arbitrage LLC | 0001167456 | 1,723,275 | — | ▲1,723,275 | 0.00% | $17.30Mn |
| 3 | LMR Partners LLP | 0001578621 | 1,300,000 | — | ▲1,300,000 | 0.00% | $13.05Mn |
| 4 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 0001535845 | 1,250,000 | — | ▲1,250,000 | 0.00% | $12.58Mn |
| 5 | Alberta Investment Management Corp | 0001463559 | 800,000 | — | ▲800,000 | 0.00% | $8.05Mn |
| 5 | HGC Investment Management Inc. | 0001711200 | 800,000 | — | ▲800,000 | 0.00% | $8.03Mn |
| 6 | Fort Baker Capital Management LP | 0001688382 | 600,000 | — | ▲600,000 | 0.00% | $6.02Mn |
| 7 | BNP PARIBAS FINANCIAL MARKETS | 0001166588 | 526,725 | — | ▲526,725 | 0.00% | $5.29Mn |
| 8 | MILLENNIUM MANAGEMENT LLC | 0001273087 | 500,000 | — | ▲500,000 | 0.00% | $5.02Mn |
| 9 | Radcliffe Capital Management, L.P. | 0001218275 | 499,900 | — | ▲499,900 | 0.00% | $5.02Mn |
| 10 | Centiva Capital, LP | 0001692507 | 425,000 | — | ▲425,000 | 0.00% | $4.27Mn |
| 11 | PICTON MAHONEY ASSET MANAGEMENT | 0001539041 | 400,000 | — | ▲400,000 | 0.00% | $4.02Mn |
| 12 | Decagon Asset Management LLP | 0001950677 | 375,000 | — | ▲375,000 | 0.00% | $3.77Mn |
| 13 | WHITEBOX ADVISORS LLC | 0001257391 | 350,000 | — | ▲350,000 | 0.00% | $3.51Mn |
| 14 | MOORE CAPITAL MANAGEMENT, LP | 0001448574 | 300,000 | — | ▲300,000 | 0.00% | $3.01Mn |
| 15 | Lineage Point Capital LP | 0002093311 | 295,719 | — | ▲295,719 | 0.00% | $2.97Mn |
| 16 | Calamos Advisors LLC | 0001316507 | 200,000 | — | ▲200,000 | 0.00% | $2.02Mn |
| 16 | RIVERNORTH CAPITAL MANAGEMENT, LLC | 0001447578 | 200,000 | — | ▲200,000 | 0.00% | $2.03Mn |
| 16 | Schonfeld Strategic Advisors LLC | 0001665241 | 200,000 | — | ▲200,000 | 0.00% | $2.01Mn |
| 17 | Toronto Dominion Bank | 0000947263 | 199,900 | — | ▲199,900 | 0.00% | $2.01Mn |