Adagio Medical Holdings, Inc.

Unless the context indicates otherwise, references in this Annual Report to the “Company,” “Adagio,” “Successor,” “we,” “us,” “our” and similar terms refer to Adagio Medical Holdings, Inc. (f/k/a Aja Holdco, Inc.) and its consolidated subsidiaries. References to “ListCo” refer to Aja Holdco, Inc. prior to the consummation of the Business Combination (as defined below).

On July 31, 2024, or the Closing Date (as defined below), ARYA Sciences Acquisition Corp IV, a Cayman Islands exempted company (“ARYA”), Aja Holdco, Inc. (“ListCo”), a Delaware corporation and wholly-owned subsidiary of ARYA, Aja Merger Sub 1, a Cayman Islands exempted company and wholly-owned subsidiary of ListCo (“ARYA Merger Sub”), Aja Merger Sub 2, Inc., a Delaware corporation and wholly-owned subsidiary of ListCo (“Company Merger Sub”), and Adagio Medical, Inc., a Delaware corporation (“Legacy Adagio” or the “Predecessor”), consummated the business combination (the “Business Combination”) pursuant to the terms of the Business Combination Agreement, dated February 13, 2024, by and among the foregoing parties, as amended by the Consent and Amendment No. 1 to Business Combination Agreement, dated as of June 25, 2024, by and between ARYA and Legacy Adagio (the “Business Combination Agreement”).

Pursuant to the Business Combination Agreement, on the Closing Date, (i) ARYA Merger Sub merged with and into ARYA (the “ARYA Merger”) and Company Merger Sub merged with and into Legacy Adagio (the “Adagio Merger” and, together with the ARYA Merger, the “Mergers”), with ARYA and Legacy Adagio surviving the Mergers and, after giving effect to such Mergers, each of ARYA and Legacy Adagio becoming a wholly-owned subsidiary of ListCo (the time that the ARYA Merger becomes effective being referred to as the “ARYA Merger Effective Time,” the time that the Adagio Merger becomes effective being referred to as the “Adagio Merger Effective Time,” the time after which both Mergers become effective being referred to as the “Closing,” and the date on which the Closing occurs being referred to as the “Closing Date”), (ii) ListCo filed with the Secretary of State of the State of Delaware an amended and restated certificate of incorporation of ListCo (the “Charter”), and the board of directors of ListCo approved and adopt amended and restated bylaws of ListCo (the “Bylaws”), and (iii) ListCo changed its name to Adagio Medical Holdings, Inc.