MACOM Technology Solutions Holdings, Inc.

Transactions in our securities by directors and officers are required to be made in accordance with our insider trading policy, which requires that the transactions be in accordance with applicable U.S. federal securities laws that prohibit trading while in possession of material nonpublic information. Rule 10b5-1 under the Exchange Act provides an affirmative defense that enables directors and officers to prearrange transactions in our securities in a manner that avoids concerns about initiating transactions while in possession of material nonpublic information.

The following table describes actions by our directors and Section 16 officers with respect to plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) during the fourth quarter of fiscal year 2025. None of our directors or Section 16 officers terminated a Rule 10b5-1 trading arrangement or took actions with respect to a “non-Rule 10b5-1 trading arrangement,” as such term is defined in Item 408(c) of Regulation S-K, during the fourth quarter of fiscal year 2025.

(1) Represents the gross number of shares subject to the Rule 10b5-1 plan, excluding the potential effect of shares withheld for taxes. Amounts may include shares to be earned as PRSUs and are presented at their target amounts. The actual number of PRSUs earned following the end of the applicable performance period, if any, will depend on the relative attainment of the performance metrics.

(2) Date of plan termination or such earlier date upon which all transactions are completed or expire without execution.