X0508 4 2025-10-28 0 0001493594 MACOM Technology Solutions Holdings, Inc. MTSI 0001588004 Dennehy Robert C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS 100 CHELMSFORD STREET LOWELL MA 01851 0 1 0 0 SVP, Operations 0 Common Stock 2025-10-28 4 A 0 2463 0 A 8381 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 821 shares on 10/28/2026, 821 shares on 10/28/2027 and 821 shares on 10/28/2028, provided that the Reporting Person remains in continuous service with the Issuer through each such vesting date. /s/ Ambra R. Roth, Attorney-in-Fact 2025-10-30