X0609 4 2026-05-04 0 0002064658 Yorkville Acquisition Corp. MCGA 0001271848 ANGELO MARK false C/O YORKVILLE ACQUISITION CORP 1012 SPRINGFIELD AVENUE MOUNTAINSIDE NJ 07092 1 0 1 0 0002074603 Yorkville Acquisition Sponsor LLC false C/O YORKVILLE ACQUISITION CORP 1012 SPRINGFIELD AVENUE MOUNTAINSIDE NJ 07092 0 0 1 0 0 Convertible Working Capital Note 2026-05-04 4 A 0 50000 A Class A ordinary shares 50000 50000 I Yorkville Acquisition Sponsor, LLC Convertible Working Capital Note 2026-05-04 4 A 0 16666 A Warrants 16666 16666 I Yorkville Acquisition Sponsor, LLC On May 4, 2026, the Issuer entered into an Amended and Restated Working Capital Note (the "Note") promising to pay Yorkville Acquisition Sponsor, LLC (the "Sponsor") $500,000. All amounts due under the Note may be converted into 50,000 units. Each unit consists of one Class A ordinary share and one-third of one warrant to purchase one Class A ordinary share, resulting in an aggregate of 50,000 Class A ordinary shares and warrants to purchase an additional 16,666 Class A ordinary shares of the Issuer at the discretion of the Sponsor upon the consummation of the business combinations. The warrants shall have the same terms and conditions as the warrants issued in the Issuer's initial public offering. The acquisition of the Note by the Sponsor, and through it, the beneficial acquisition of the Note by the Sponsor's members, is an exempt transaction under Rule 16b-3, promulgated by the U.S. Securities and Exchange Commission pursuant to the Securities Act of 1934, as amended. The principal balance of the Note shall be payable by the Issuer on the earlier of the date on which the Issuer consummates its initial business combination or the date that the winding up of the Issuer is effective, and is convertible at the Sponsor's election upon the consummation of the initial business combination. The Issuer's Class A ordinary shares and warrants are described under the heading "Description of Securities" in the Issuer's Registration Statement on Form S-1 (File No. 333-286569). Yorkville Advisors Global, LP ("Yorkville LP") is the manager of the Sponsor and holds voting and investment discretion over the securities held by the Sponsor. YA II PN, Ltd. ("YA II PN") is a member of the Sponsor. Yorkville LP is the investment manager of YA II PN, and Yorkville Advisors Global II, LLC ("Yorkville LLC") is the General Partner of Yorkville LP. Mr. Angelo serves as President of Yorkville LLC and makes all investment decisions for YA II PN. As such, Mr. Angelo may be deemed to have beneficial ownership of the securities held by the Sponsor. Mr. Angelo disclaims any beneficial ownership of the reported securities, except to the extent of his pecuniary interest therein. Mark Angelo 2026-07-21 Mark Angelo, Yorkville Acquisition Sponsor, LLC 2026-01-21