{"url_path":"/sec/mcga/8-k/2026-07-15/item-1-01","section_key":"item-1-01","section_title":"Item 1.01 **","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-07-15","source_url":"https://www.sec.gov/Archives/edgar/data/2064658/0001104659-26-083939-index.html","accession_number":"0001104659-26-083939","cik":"0002064658","ticker":"MCGA","issuer_name":"Yorkville Acquisition Corp.","edgar_url":"https://www.sec.gov/Archives/edgar/data/2064658/0001104659-26-083939-index.html","primary_entity_key":"0002064658","primary_entity_name":"Yorkville Acquisition Corp."},"word_count":331,"has_tables":true,"body_markdown":"**Item 1.01.**\n**Entry into a Material Definitive Agreement.**\n\n \n\n**Amended and Restated Working Capital Note**\n\n \n\nOn February 11, 2026, Yorkville Acquisition Corp. (the “Company”)\nissued a convertible unsecured promissory note (the “Prior Note”) in the aggregate principal amount of $250,000.00 to Yorkville\nAcquisition Sponsor, LLC, a Delaware limited liability company (the “Sponsor”), in order to provide the Company with additional\nworking capital, as previously disclosed in the Company’s Current Report on Form 8-K filed with the U.S. Securities and Exchange\nCommission (the “SEC”) on February 17, 2026. On May 4, 2026, the Sponsor advanced an additional $250,000 to the\nCompany for additional working capital purposes. Also on May 4, 2026, in order to document such additional advance, the Company issued\nan amended and restated convertible unsecured promissory note (the “Amended and Restated Working Capital Note”) in the aggregate\nprincipal amount of $500,000.00 to the Sponsor, which amends, restates, supersedes and replaces the Prior Note in its entirety. Pursuant\nto the terms of the Amended and Restated Working Capital Note, the principal balance shall not accrue interest; shall be payable by the\nCompany on the earlier of the date on which the Company consummates its initial business combination or the date that the winding up of\nthe Company is effective; and is convertible at the Sponsor’s election upon the consummation of the Company’s initial business\ncombination. Should the Sponsor elect to convert all or a portion of the principal balance, the elected principal balance amount will\nconvert, at a price of $10.00 per unit, into units identical to the private placement units issued in connection with the Company’s\ninitial public offering (each, a “New Unit”), rounded down to the nearest whole number.\n\n \n\nThe foregoing description of the Amended and Restated Working Capital\nNote does not purport to be complete and is qualified in its entirety by reference to the full text of the Amended and Restated Working\nCapital Note, which is filed hereto as Exhibit 10.1 and which is incorporated herein by reference."}