X0508 4 2026-02-12 0001633978 Lumentum Holdings Inc. LITE 0001648256 Retort Vincent C/O LUMENTUM HOLDINGS INC. 1001 RIDDER PARK DRIVE SAN JOSE CA 95131 false true false false SEE REMARKS 1 Common Stock 2026-02-12 4 S 0 450 576.3523 D 147031 D Common Stock 2026-02-12 4 S 0 386 577.283 D 146645 D Common Stock 2026-02-12 4 S 0 250 578.594 D 146395 D Common Stock 2026-02-12 4 S 0 1363 579.6578 D 145032 D Common Stock 2026-02-12 4 S 0 2399 580.3438 D 142633 D Common Stock 2026-02-12 4 S 0 1068 581.4928 D 141565 D Common Stock 2026-02-12 4 S 0 260 582.5692 D 141305 D Common Stock 2026-02-12 4 S 0 170 584.8385 D 141135 D Common Stock 2026-02-12 4 S 0 2170 586.2886 D 138965 D Common Stock 2026-02-12 4 S 0 910 587.2794 D 138055 D Common Stock 2026-02-12 4 S 0 1368 588.4333 D 136687 D Common Stock 2026-02-12 4 S 0 3593 589.7011 D 133094 D Common Stock 2026-02-12 4 S 0 3738 590.5582 D 129356 D Common Stock 2026-02-12 4 S 0 7673 591.8233 D 121683 D Common Stock 2026-02-12 4 S 0 1953 592.7779 D 119730 D Common Stock 2026-02-12 4 S 0 2888 593.7391 D 116842 D Common Stock 2026-02-12 4 S 0 3576 594.7973 D 113266 D Common Stock 2026-02-12 4 S 0 2939 595.8707 D 110327 D Common Stock 2026-02-12 4 S 0 1626 597.0391 D 108701 D Common Stock 2026-02-12 4 S 0 2959 598.0859 D 105742 D Common Stock 2026-02-12 4 S 0 1516 599.5127 D 104226 D Common Stock 2026-02-12 4 S 0 650 600.1785 D 103576 D Common Stock 2026-02-12 4 S 0 1121 601.8192 D 102455 D These shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 13, 2025. These sales were executed in multiple trades at prices ranging from $575.795 to $576.665. 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 (24) 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 $577.00 to $577.50. These sales were executed in multiple trades at prices ranging from $578.00 to $578.99. These sales were executed in multiple trades at prices ranging from $579.00 to $579.8975. These sales were executed in multiple trades at prices ranging from $580.00 to $580.97. These sales were executed in multiple trades at prices ranging from $581.03 to $582.00. These sales were executed in multiple trades at prices ranging from $582.50 to $582.60. These sales were executed in multiple trades at prices ranging from $584.34 to $585.305. These sales were executed in multiple trades at prices ranging from $585.68 to $586.60. These sales were executed in multiple trades at prices ranging from $587.00 to $587.60. These sales were executed in multiple trades at prices ranging from $588.01 to $588.98. These sales were executed in multiple trades at prices ranging from $589.045 to $589.98. These sales were executed in multiple trades at prices ranging from $590.09 to $591.07. These sales were executed in multiple trades at prices ranging from $591.26 to $592.225. These sales were executed in multiple trades at prices ranging from $592.275 to $593.27. These sales were executed in multiple trades at prices ranging from $593.30 to $594.295. These sales were executed in multiple trades at prices ranging from $594.48 to $595.45. These sales were executed in multiple trades at prices ranging from $595.50 to $596.25. These sales were executed in multiple trades at prices ranging from $596.61 to $597.50. These sales were executed in multiple trades at prices ranging from $597.63 to $598.515. These sales were executed in multiple trades at prices ranging from $598.88 to $599.84. These sales were executed in multiple trades at prices ranging from $599.97 to $600.88. These sales were executed in multiple trades at prices ranging from $601.30 to $602.185. Officer title: Executive Vice President, Module Business Unit R&D and Product Development /s/ Jae Kim as Attorney-in-Fact 2026-02-13