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

102261 14105882.00 74471281 10/16/2025 NASDAQ Common 06/30/2009 Founder Shares Issuer N 102261 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 SUSAN OCAMPO

100 CHELMSFORD STREET LOWELL MA 01851

Common 09/18/2025 150000 19964226.00 Susan O'Campo

100 Chelmsford Street Lowell MA 01851

Common 10/07/2025 62476 8323322.80 Susan O'Campo

100 Chelmsford Street Lowell MA 01851

Common 10/08/2025 150000 19954340.00 Susan O'Campo

100 Chelmsford Street Lowell MA 01851

Common 10/14/2025 53104 7064618.00 Susan O'Campo

100 Chelmsford Street Lowell MA 01851

Common 10/15/2025 150000 20402492.00 Filing encompasses 3 Trust accounts in which Susan Ocampo is the TTEE 4 WK average volume Sept 15th Wk 1: 9,404,600 Sept 22nd Wk 2: 5,758,700 Sept 29th Wk 3: 4,852,300 Oct 6th Wk 4: 5,300,200 Total = 25,315,800 / 4 = 6,328,950 shares per week average 10/16/2025 Susan O'Campo