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Keystone Acquisition Corp

CUSIP: G52539114 | 29 institutional holders

Quarters

Q3 2026Q2 2026
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Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13GMagnetar Financial LLC2,000,0007.0%New 5%+ stakeJun 30, 2026No 13F filer matched
13GMagnetar Financial LLC2,000,000
7.0% of class · Jun 30, 2026

Institutional Holders — Q3 2026

Alberta Investment Management Corp800,000
0.0% of portfolio›$8.1M
Calamos Advisors LLC200,000
0.0% of portfolio›$2.0M
StyleTurnoverLocationFiled
Alberta Investment Management Corp
800,000$8.1M0.0%ValueHighEdmonton, Abu Dhabi2026-11-09
Calamos Advisors LLC
200,000$2.0M0.0%CoreMediumNaperville, IL2026-11-02
New 5%+ stake
No 13F filer matched