SCHEDULE 13G

YORKVILLE ACQUISITION CORP-A

Class A ordinary shares, $0.0001 par value per share · CUSIP: G98659116

Event date: 2026-09-30

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Westchester Capital Management, LLC

  Shares: 1,122,646 · Class: 6.30%

• Westchester Capital Partners, LLC

  Shares: 7,354 · Class: 0.04%

• Virtus Investment Advisers, LLC

  Shares: 1,046,816 · Class: 5.87%

• The Merger Fund

  Shares: 982,260 · Class: 5.51%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.