SCHEDULE 13G 0001349339 XXXXXXXX LIVE Ordinary shares, par value $0.0001 per share 12/18/2025 0002051985 Iron Horse Acquisition II Corp. 46283H202 851 Broken Sound Parkway NW Boca Raton FL 33487 Rule 13d-1(c) Linden Capital L.P. a D0 0 1436406 0 1436406 1436406 Y 6.1 PN Linden GP LLC a DE 0 1436406 0 1436406 1436406 N 6.1 HC Linden Advisors LP a DE 0 1500000 0 1500000 1500000 N 6.4 IA PN Siu Min Wong a X1 0 1500000 0 1500000 1500000 N 6.4 IN HC Iron Horse Acquisition II Corp. 851 Broken Sound Parkway NW, Boca Raton, FL 33487 This Statement is filed on behalf of each of the following persons (collectively, the "Reporting Persons") i) Linden Capital L.P., a Bermuda limited partnership ("Linden Capital"); ii) Linden GP LLC, a Delaware limited liability company ("Linden GP"); iii) Linden Advisors LP, a Delaware limited partnership ("Linden Advisors"); and iv) Siu Min (Joe) Wong ("Mr. Wong"). This Statement relates to Ordinary shares, par value $0.0001 per share (the "Shares") of Iron Horse Acquisition II Corp. (the "Issuer") held for the account of Linden Capital and one or more separately managed accounts (the "Managed Accounts"). Linden GP is the general partner of Linden Capital and, in such capacity, may be deemed to beneficially own the Shares held by Linden Capital. Linden Advisors is the investment manager of Linden Capital and trading advisor or investment advisor for the Managed Accounts. Mr. Wong is the principal owner and controlling person of Linden Advisors and Linden GP. In such capacities, Linden Advisors and Mr. Wong may each be deemed to beneficially own the Shares held by Linden Capital and the Managed Accounts. The principal business address for Linden Capital is Victoria Place, 31 Victoria Street, Hamilton HM10, Bermuda. The principal business address for each of Linden Advisors, Linden GP and Mr. Wong is 590 Madison Avenue, 32nd Floor, New York, New York 10022. i) Linden Capital is a Bermuda limited partnership. ii) Linden GP is a Delaware limited liability company. iii) Linden Advisors is a Delaware limited partnership. iv) Mr. Wong is a citizen of China (Hong Kong) and the United States. Y As of December 18, 2025, each of Linden Advisors and Mr. Wong may be deemed the beneficial owner of 1,500,000 Shares. This amount consists of 1,436,406 Shares held by Linden Capital and 63,594 Shares held by the Managed Accounts. As of December 18, 2025 each of Linden GP and Linden Capital may be deemed the beneficial owner of the 1,436,406 Shares held by Linden Capital. As of December 18, 2025, each of Linden Advisors and Mr. Wong may be deemed the beneficial owner of approximately 6.4% of Shares outstanding, and each of Linden GP and Linden Capital may be deemed the beneficial owner of approximately 6.1% of Shares outstanding. Linden Capital and Linden GP: 0 Linden Advisors and Mr. Wong: 0 Linden Capital and Linden GP: 1,436,406 Linden Advisors and Mr. Wong: 1,500,000 Linden Capital and Linden GP: 0 Linden Advisors and Mr. Wong: 0 Linden Capital and Linden GP: 1,436,406 Linden Advisors and Mr. Wong: 1,500,000 Y N See disclosure in Items 2 and 4 hereof. N See disclosure in Item 2 hereof. N See Exhibit A attached hereto. Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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. Linden Capital L.P. /S/ Saul Ahn 12/22/2025 Linden GP LLC /S/ Saul Ahn 12/22/2025 Linden Advisors LP /S/ Saul Ahn 12/22/2025 Siu Min Wong /S/ Saul Ahn 12/22/2025 **Duly authorized under Siu Min Wong's Power of Attorney, dated June 10, 2019, incorporated herein by reference to Exhibit B of the statement on Schedule 13G filed by Linden Capital L.P. on June 19, 2019 in respect of its holdings in Haymaker Acquisition Corp II.