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 May 19, 2026, Wupen Yuen, our President, Global Business Units, adopted a modification of his Rule 10b5-1 trading arrangement entered into on November 5, 2025, providing for the sale from time to time of an aggregate of up to 18,422 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 May 19, 2027, or earlier if all transactions under the trading arrangement are completed.

On May 26, 2026, Wajid Ali, our Executive Vice President and Chief Financial Officer, adopted a modification of his Rule 10b5-1 trading arrangement entered into on November 28, 2025. The modified plan provides for the sale from time to time of an aggregate of up to 61,936 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 May 26, 2027, or earlier if all transactions under the trading arrangement are completed.

On May 28, 2026, Michael Hurlston, our President and Chief Executive Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 1,096 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until May 28, 2027, or earlier if all transactions under the trading arrangement are completed.