Material Agreement, Financial Obligation (Form 8-K)

Item 1.01 Entry into a Material Definitive Agreement.

On April 29, 2025, byNordic Acquisition Corporation ("BYNO", the "Company") issued a promissory note (the "Note") in the principal amount of $250,000 to Achilles Capital AB (the "Lender"), an affiliate of Water by Nordic AB, the Company's sponsor. The proceeds of the Note will be used to provide the Company with general working capital.

The Note bears no interest and is payable in full upon the consummation of the Company's initial business combination (the "Maturity Date"). A failure to pay the principal on the Maturity Date shall be deemed an event of default, in which case the Note may be accelerated. If the Company does not consummate an initial business combination, the Note will be repaid solely to the extent the Company has funds available outside its trust account established in connection with the Company's initial public offering.

A copy of the Note is attached as Exhibit 10.1 to this Current Report on Form 8-K and is incorporated herein by reference. The disclosures set forth in this Item 1.01 are intended to be summaries only and are qualified in their entirety by reference to the Note.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The disclosure contained in Item 1.01 of this Current Report on Form 8-K is incorporated by reference in this Item 2.03.