144 0001252243 XXXXXXXX LIVE 0001493594 MACOM Technology Solutions Holdings, Inc. 001-35451 100 CHELMSFORD STREET LOWELL MA 01851 (978) 656-2500 OCAMPO SUSAN 10% Stockholder Common The Charles Schwab Corporation

3000 Schwab Way Westlake TX 76262

150000 19449000.00 74471281 09/18/2025 NASDAQ Common 06/30/2009 Founder Shares Issuer N 150000 06/03/2009 N/A N SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/05/2025 113275 14885388.00 SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/08/2025 3195 421918.00 SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/09/2025 45986 6029536.00 SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/10/2025 50361 6679719.00 SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/11/2025 80891 10716701.00 SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/12/2025 89868 11940024.00 SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/15/2025 150424 19920486.00 SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/17/2025 62435 8305195.00 Filing encompasses 3 Trust accounts in which Susan Ocampo is the TTEE 4 WK average volume Wk 1 2,790,200 Wk 2 4,351,000 Wk 3 3,033,600 Wk 4 4,047,400 Total = 14,222,200 / 4 = 3,555,550 shares per week average - total 746,435 sold so far 09/18/2025 Susan O'Campo