X0306 4 2018-11-06 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 Common Stock 2018-11-06 4 A 0 9545 0 A 69352 D Represents restricted stock units granted to the Reporting Person under the Issuer's 2012 Omnibus Incentive Plan. Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock. The restricted stock units vest in four equal annual installments on May 15, 2020, May 15, 2021, May 15, 2022 and May 15, 2023, provided that the Reporting Person remains in continuous service with the Issuer through each vesting date. /s/ Ambra R. Roth, Attorney-in-Fact 2018-11-08