LITE: Financial results

Item 2.02. Results of Operations and Financial Condition. On November 2, 2026 , Lumentum Holdings Inc. (the “Company”) reported results for its fiscal first quarter ended September 26, 2026. A copy of the Company’s press release is furnished herewith as Exhibit 99.1. The information in this Current Report on Form 8-K, including Exhibit 99.1, is intended to be furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing. Item 9.01. Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description 99.1 Press release entitled “Lumentum Announces First Quarter of Fiscal Year 2027 Financial Results” dated November 2, 2026 104 Cover Page Interactive Data File (formatted as Inline XBRL) 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/ Wajid Ali Name: Wajid Ali Title: Chief Financial Officer November 2, 2026