LITE: Leadership change

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On July 27, 2026, Vincent Retort, Executive Vice President, Global Reliability & Quality of Lumentum Holdings Inc. (the “Company”), informed the Company of his planned retirement from the Company, effective in October 2026. Mr. Retort has agreed to provide consulting services to the Company for a two-year term following his retirement (the “Consulting Term”). In exchange for Mr. Retort’s services, his outstanding equity awards will continue to vest during the Consulting Term in accordance with their existing vesting schedules, provided that he remains as a service provider to the Company. Signature Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. LUMENTUM HOLDINGS INC. By: /s/ Jae Kim Name: Jae Kim Title: Senior Vice President, General Counsel and Secretary July 30, 2026