SCHEDULE 13G 0001950677 XXXXXXXX LIVE Class A Ordinary Shares 09/30/2025 0002064658 Yorkville Acquisition Corp. G98659116 1012 SPRINGFIELD AVENUE MOUNTAINSIDE NJ 07092 Rule 13d-1(b) Decagon Asset Management LLP X0 0 1035316 0 1035316 1035316 N 5.81 IA PN Benjamin John Durham X0 0 1035316 0 1035316 1035316 N 5.81 HC IN Yorkville Acquisition Corp. 1012 SPRINGFIELD AVENUE, MOUNTAINSIDE, NEW JERSEY 07092 This statement is filed by: (i) Decagon Asset Management LLP (the "Investment Manager") which serves as the investment manager or sub-adviser, with respect to certain funds and accounts (the "DAM Vehicles"), with respect to the Class A ordinary shares, par value $0.0001 per share ("Class A Ordinary Shares") of Yorkville Acquisition Corp. (the "Company") held by the DAM Vehicles; and (ii) Benjamin John Durham ("Mr. Durham") who indirectly controls the Investment Manager, with respect to the Class A Ordinary Shares held by the Dam Vehicles. The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons." The filing of this statement should not be construed as an admission that any of the Reporting Persons is the beneficial owner of the Class A Ordinary Shares reported herein. The address of the business office of each of the Reporting Persons is: c/o Decagon Asset Management LLP 5 SWALLOW PLACE LONDON, United Kingdom W1B 2AF Citizenship is set forth in Row 4 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. N IA HC The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The percentage set forth in this Schedule 13G as of September 30, 2025 is calculated based upon an aggregate of 17,831,250 Class A Ordinary Shares outstanding as of August 14, 2025, as reported in the Company's Company's Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2025, filed with the Securities and Exchange Commission on August 14, 2025. 5.81 The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Y N See Item 2(a). Squarepoint Diversified Partners Fund Limited, a DAM Vehicle, has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, more than 5% of the Class A Ordinary Shares. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. EXHIBIT 99.1 JOINT ACQUISITION STATEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint acquisition statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate. DATED: November 14th, 2025 DECAGON ASSET MANAGEMENT LLP By: /s/ Olivia Cooper Name: Olivia Cooper Title: COO /s/ Benjamin John Durham BENJAMIN JOHN DURHAM Decagon Asset Management LLP Olivia Cooper 11/14/2025 Benjamin John Durham Benjamin Durham 11/14/2025