X0609 4 2026-10-21 0 0001493594 MACOM Technology Solutions Holdings, Inc. MTSI 0001792846 Roth Ambra R. false C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS 100 CHELMSFORD STREET LOWELL MA 01851 0 1 0 0 SVP, GC and Secretary 0 Common Stock 2026-10-21 4 A 0 1401 0 A 10585 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 467 shares on 10/21/2027, 467 shares on 10/21/2028 and 467 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 2026-10-23