X0609 4 2026-08-25 0001633978 Lumentum Holdings Inc. LITE 0001489550 Wupen Yuen false C/O LUMENTUM HOLDINGS INC. 1001 RIDDER PARK DRIVE SAN JOSE CA 95131 false true false false PRESIDENT, GLOBAL BUS. UNITS 1 Common Stock 2026-08-25 4 A 0 5138 0 A 120627 D Common Stock 2026-08-27 4 S 0 500 958.66 D 119127 D These securities are restricted stock units ("RSUs"). Each RSU represents a contingent right to receive, following vesting, one share of the Issuer's Common Stock. 1/3 of the shares shall vest one year from the grant date, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter on the 15th of November, February, May and August, subject to the Reporting Person continuing to be an employee through each such date, or as provided under the Issuer's 2025 Equity Incentive Plan. The number of shares reported as beneficially owned following the reported transaction is as of August 25, 2026 and prior to other transactions that occurred August 25, 2026 and August 26, 2026 as reported in a Form 4 filed by the Reporting Person on August 26, 2026. These shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 19, 2026. /s/ Jae Kim as Attorney-in-Fact 2026-08-27