Material Agreement (Form 8-K)

Item 1.01 Entry into a Material Definitive Agreement.

Following the announcement on March 2, 2026 that The AES Corporation (the "Company" or "AES") had entered into an Agreement and Plan of Merger, by and among the Company, Horizon Parent, L.P., a Delaware limited partnership ("Parent"), and Horizon Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent, the Company entered into (i) Amendment No. 2 to the Credit Agreement (the "Citi Second Amendment") on March 13, 2026, by and among the Company, the lenders party thereto and Citibank, N.A., as administrative agent, which amends that certain Eighth Amended and Restated Credit Agreement, dated as of September 24, 2021, by and among the Company, as borrower, the lenders from time to time party thereto and Citibank, N.A., as administrative agent, (ii) First Amendment to Credit Agreement (the "SMBC First Amendment") on March 16, 2026, by and among the Company, the lenders party thereto and Sumitomo Mitsui Banking Corporation, as administrative agent, which amends that certain Credit Agreement, dated as of December 6, 2024, by and among the Company, as borrower, the lenders party thereto and Sumitomo Mitsui Banking Corporation, as administrative agent and (iii) Amendment No. 1 to the Letter of Credit Agreement (the "Barclays First Amendment") on March 16, 2026, by and among the Company and Barclays Bank PLC, as the bank, which amends that certain Letter of Credit Agreement, dated as of December 8, 2025, by and among the Company, as account party, and Barclays Bank PLC, as the bank.

Collectively, these amendments modify certain change of control provisions to permit direct or indirect ownership of the Company by Global Infrastructure Management, LLC, EQT Fund Management S.à r.l., Qatar Investment Authority, and certain investment vehicles affiliated with any of the foregoing or with funds, accounts or other entities managed, advised or controlled by any of the foregoing.

The foregoing summaries of the Citi Second Amendment, the SMBC First Amendment and the Barclays First Amendment do not purport to be complete and are qualified in their entirety by reference to such documents, copies of which are filed as Exhibits 10.1, 10.2 and 10.3, respectively, to this Current Report on Form 8-Kand are incorporated herein by reference.