Lumentum Holdings Inc.

Securities Trading Plans of Directors and Executive Officers

During our last fiscal quarter, the following officers, as defined in Rule 16a-1(f), adopted a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” each as defined in Regulation S-K Item 408.

On November 5, 2025, Wupen Yuen, our President, Global Business Units, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 28,522 shares of our common stock (based on PSUs vesting at target). The actual number of shares sold under the trading arrangement will depend on achievement of performance targets applicable to the PSUs subject to the trading arrangement, be subject to vesting of the PSUs and RSUs subject to the trading arrangement, and be net of shares withheld for taxes upon vesting and settlement of the PSUs and RSUs subject to the trading arrangement. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until December 31, 2026, or earlier if all transactions under the trading arrangement are completed.

On November 13, 2025, Vince Retort, our President, Modules R&D and New Product Design and Development, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate up to 105,445 shares of our common stock (based on PSUs vesting at target). The actual number of shares sold under the trading arrangement will depend on achievement of performance targets applicable to the PSUs subject to the trading arrangement, be subject to vesting of the PSUs and RSUs subject to the trading arrangement, and be net of shares withheld for taxes upon vesting and settlement of the PSUs and RSUs subject to the trading arrangement. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until November 20, 2026, or earlier if all transactions under the trading arrangement are completed.

On November 28, 2025, Wajid Ali, our Chief Financial Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 66,265 shares of our common stock (based on PSUs vesting at target). The actual number of shares sold under the trading arrangement will depend on achievement of performance targets applicable to the PSUs subject to the trading arrangement, be subject to vesting of the PSUs and RSUs subject to the trading arrangement, and be net of shares withheld for taxes upon vesting and settlement of the PSUs and RSUs subject to the trading arrangement. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until November 30, 2026, or earlier if all transactions under the trading arrangement are completed.