Iron Horse Acquisition II Corp. Commitments Disclosure

Note 5 — Commitments and Contingencies

Registration Rights

The holders of the Founders Shares issued and outstanding, as well as the holders of the private placement units, including those to be issued upon conversion of the rights, and any rights the initial shareholders, officers, directors or their affiliates may be issued in payment of working capital loans made to the Company (and all underlying securities), will be entitled to registration rights pursuant to an agreement signed on December 16, 2025. The holders of a majority of these securities are entitled to make up to two demands that the Company register such securities. The holders of the majority of the Founders Shares can elect to exercise these registration rights at any time commencing three months prior to the date on which these ordinary shares are to be released from escrow. The holders of a majority of the public and private rights issued to our initial shareholders, officers, directors or their affiliates in payment of working capital loans made to the Company (or underlying securities) can elect to exercise these registration rights at any time after the Company consummates a Business Combination. Notwithstanding anything to the contrary, the underwriter may only make a demand on one occasion and only during the five-year period beginning on the effective date of the registration statement of which this prospectus forms a part. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to our consummation of a Business Combination; provided, however, that the underwriter may participate in a “piggy-back” registration only during the seven-year period beginning on the effective date of the Initial Public Offering. The Company will bear the expenses incurred in connection with the filing of any such registration statements.

Underwriting Agreement

The Company granted the underwriters a 45-day option from the date of Initial Public Offering to purchase up to 3,000,000 additional Units to cover over-allotments, if any, at the Initial Public Offering price less the underwriting discounts and commissions. On December 18, 2025, the underwriters elected to fully exercise their over-allotment option to purchase an additional 3,000,000 Units at a price of $10.00 per Unit.

The underwriters were entitled to a cash underwriting discount of 2.0% of the gross proceeds of the Initial Public Offering, or $4,000,000, which was paid upon the closing of the Initial Public Offering.

Additionally, the underwriters were entitled to a deferred underwriting discount of 4.50% of the gross proceeds of the Initial Public Offering held in the Trust Account other than those sold pursuant to the underwriters’ over-allotment option and 6.50% of the gross proceeds sold pursuant to the underwriters’ over-allotment option, or $10,950,000 in the aggregate. The deferred underwriting discount will become payable to the underwriter from the amounts held in the Trust Account solely in the event the Company completes its Initial Business Combination.