Wintergreen Acquisition Corp. (the “Company”) filed a Current Report on Form 8-K dated September 28, 2026, disclosing a definitive agreement to issue an unsecured promissory note to its sponsor, MACRO DREAM Holdings Limited. The note has a principal amount of $184,635 and was issued to fund the extension of the deadline for the Company to consummate its initial business combination.

The Company’s Board of Directors approved the extension of the Business Combination Deadline from September 30, 2026, to October 30, 2026, upon the request of the Sponsor. The Company is continuing to pursue the previously announced business combination with KIKA Technology Inc. pursuant to a Merger Agreement dated November 17, 2025.

The promissory note does not bear interest and matures upon the earlier of the closing of the Company’s initial business combination or the date the Company is required to liquidate. In the event that the Company does not consummate a business combination, the Note will be forgiven, and the Sponsor will have no right to receive payment under the Note. The Sponsor has agreed to waive any right to receive distributions from the Trust Account related to the Note.

At the Sponsor’s option, prior to full payment of the principal balance, the Sponsor may elect to convert all or any portion of the unpaid principal balance into units of the Company at a conversion price of $10.00 per unit. These units would be identical to the placement units issued to the Sponsor during the private placement that closed simultaneously with the Company’s initial public offering. The issuance of the Note was made pursuant to an exemption from registration under Section 4(a)(2) of the Securities Act of 1933.