Yorkville Acquisition Corp. issues $500K amended promissory note to sponsor for working capital

Yorkville Acquisition Corp.

Sponsor advanced additional $250K on May 4, 2026, increasing total principal to $500K under amended note.
Note is non-interest bearing, due upon business combination or winding up.
Convertible at sponsor's option at $10/unit into units identical to private placement units (max 50,000 units).
Note amends and restates prior $250K note from February 11, 2026.
Issuance relied on Section 4(a)(2) exemption for unregistered securities.

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