X0609 4 2026-08-25 0001633978 Lumentum Holdings Inc. LITE 0001570465 Kim Jae false C/O LUMENTUM HOLDINGS INC. 1001 RIDDER PARK DRIVE SAN JOSE CA 95131 false true false false SVP, GENERAL COUNSEL 1 Common Stock 2026-08-25 4 S 0 205 842.3932 D 49599 D Common Stock 2026-08-25 4 S 0 280 843.6821 D 49319 D Common Stock 2026-08-25 4 S 0 360 844.6617 D 48959 D Common Stock 2026-08-25 4 S 0 570 845.959 D 48389 D Common Stock 2026-08-25 4 S 0 456 847.0044 D 47933 D Common Stock 2026-08-25 4 S 0 491 847.9411 D 47442 D Common Stock 2026-08-25 4 S 0 600 849.1433 D 46842 D Common Stock 2026-08-25 4 S 0 600 850.4378 D 46242 D Common Stock 2026-08-25 4 S 0 970 851.3098 D 45272 D Common Stock 2026-08-25 4 S 0 1998 852.3285 D 43274 D Common Stock 2026-08-25 4 S 0 851 853.5373 D 42423 D Common Stock 2026-08-25 4 S 0 1080 854.8428 D 41343 D Common Stock 2026-08-25 4 S 0 273 855.8929 D 41070 D Common Stock 2026-08-25 4 S 0 1679 856.698 D 39391 D Common Stock 2026-08-25 4 S 0 815 857.9592 D 38576 D Common Stock 2026-08-25 4 S 0 40 858.64 D 38536 D Common Stock 2026-08-25 4 S 0 732 860.0367 D 37804 D Common Stock 2026-08-25 4 A 0 1635 0 A 39439 D These shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 6, 2026. These sales were executed in multiple trades at prices ranging from $842.06 to $843.02. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide full information regarding the number of shares sold at each separate price, within the ranges set forth in footnotes (2) through (17) to this Form 4, upon request, to the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer. These sales were executed in multiple trades at prices ranging from $843.13 to $843.94. These sales were executed in multiple trades at prices ranging from $844.20 to $845.00. These sales were executed in multiple trades at prices ranging from $845.41 to $846.33. These sales were executed in multiple trades at prices ranging from $846.475 to $847.44. These sales were executed in multiple trades at prices ranging from $847.505 to $848.495. These sales were executed in multiple trades at prices ranging from $848.51 to $849.495. These sales were executed in multiple trades at prices ranging from $849.88 to $850.87. These sales were executed in multiple trades at prices ranging from $850.915 to $851.61. These sales were executed in multiple trades at prices ranging from $851.935 to $852.87. These sales were executed in multiple trades at prices ranging from $853.035 to $854.00. These sales were executed in multiple trades at prices ranging from $854.17 to $855.155. These sales were executed in multiple trades at prices ranging from $855.17 to $856.15. These sales were executed in multiple trades at prices ranging from $856.22 to $857.21. These sales were executed in multiple trades at prices ranging from $857.365 to $858.255. These sales were executed in multiple trades at prices ranging from $859.99 to $860.69. 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. /s/ Jae Kim 2026-08-27