X0306 4 2020-12-28 0001493594 MACOM Technology Solutions Holdings, Inc. MTSI 0001248224 OCAMPO JOHN L C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS 100 CHELMSFORD STREET LOWELL MA 01851 1 1 1 0 Chairman 0001252243 OCAMPO SUSAN C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS 100 CHELMSFORD STREET LOWELL MA 01851 1 0 1 0 Common Stock 2020-12-28 4 S 0 22570 50.42 D 71680 I By John Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 20293 51.60 D 51387 I By John Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 20692 52.23 D 30695 I By John Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 5761 53.59 D 24934 I By John Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 20617 54.65 D 4317 I By John Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 4317 55.22 D 0 I By John Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 23258 50.44 D 70992 I By Susan Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 23094 51.64 D 47898 I By Susan Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 15993 52.27 D 31905 I By Susan Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 6671 53.63 D 25234 I By Susan Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 21257 54.68 D 3977 I By Susan Ocampo Charitable Remainder Trust Common Stock 2020-12-28 4 S 0 3977 55.21 D 0 I By Susan Ocampo Charitable Remainder Trust Common Stock 3047742 I By trust for son Common Stock 3220242 I By trust for daughter Common Stock 3220242 I By trust for son Common Stock 9558142 I By Ocampo Family Trust - 2001 The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.02 to $51.01. The Reporting Persons undertake to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The Reporting Persons are trustees of the John Ocampo Charitable Remainder Trust, the Susan Ocampo Charitable Remainder Trust, the Ocampo Family Trust - 2001 and the trusts for the benefit of their children. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $51.02 to $52.01. The Reporting Perons undertake to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $52.02 to $53.01. The Reporting Persons undertake to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $53.02 to $54.01. The Reporting Persons undertake to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $54.02 to $55.01. The Reporting Persons undertake to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $55.02 to $55.56. The Reporting Persons undertake to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Ambra R. Roth, Attorney-in-Fact for John Ocampo and Susan Ocampo 2020-12-30