UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-33159 AERCAP HOLDINGS N.V. (Translation of Registrant’s Name into English) AerCap House, 65 St. Stephen’s Green, Dublin D02 YX20, Ireland, +353 1 819 2010 (Address of Principal Executive Office) Indicate by check mark whether the registrant files or will file annual repo ...