X0609 4 2026-10-21 0 0001493594 MACOM Technology Solutions Holdings, Inc. MTSI 0001588004 Dennehy Robert false C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS 100 CHELMSFORD STREET LOWELL MA 01851 0 1 0 0 Senior VP and COO 0 Common Stock 2026-10-21 4 A 0 2104 0 A 14862 D Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2021 Omnibus Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest as to 701 shares on 10/21/2027, 701 shares on 10/21/2028 and 702 shares on 10/21/2029, provided that the Reporting Person remains in continuous service with the Issuer through each such vesting date. /s/ Ambra R. Roth, Attorney-in-Fact 2026-10-23