X0306 4 2015-05-15 0 0001493594 M/A-COM Technology Solutions Holdings, Inc. MTSI 0000830588 SUMMIT PARTNERS L P 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 See Remarks. 0001507545 Summit Investors Management, LLC 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 0 1 See Remarks. 0001494616 Summit Investors I (UK), L.P. 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 1 0 0001435565 Summit Investors I, LLC 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 1 0 0001486418 Summit Partners PE VII, L.P. 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 See Remarks. 0001486419 Summit Partners PE VII, LLC 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 See Remarks. 0001486421 Summit Partners Private Equity Fund VII-A, L.P. 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 1 0 0001385242 Summit Partners Private Equity Fund VII B L P 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 1 0 0001018067 MANNION MARTIN J C/O SUMMIT PARTNERS 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 0 1 See Remarks. 0001627278 SUMMIT MASTER COMPANY, LLC 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 0 1 See Remarks. Common Stock 2015-05-15 4 A 0 1577 0 A 6250503 I See Footnotes. Represents restricted stock units granted to Mr. Chung as part of the director compensation program. The restricted stock units will settle on February 15, 2016 solely by delivery of an equal number of shares of Common Stock. Mr. Chung holds any restricted stock units for the benefit of Summit Partners, L.P. which he has empowered to determine when the underlying shares will be sold and which is entitled to the proceeds of any such sales. The Common Stock is held as follows: 3,889,178 shares in the name of Summit Partners Private Equity Fund VII-A, L.P.; 2,335,903 shares in the name of Summit Partners Private Equity Fund VII-B, L.P.; 10,386 shares in the name of Summit Investors I, LLC; 733 shares in the name of Summit Investors I (UK), L.P.; 14,303 shares and restricted stock units in the name of Peter Y. Chung (including the restricted stock units reported herein), which are held for the benefit of Summit Partners, L.P. Summit Partners, L.P. is the managing member of Summit Partners PE VII, LLC, which is the general partner of Summit Partners PE VII, L.P., which is the general partner of each of Summit Partners Private Equity Fund VII-A, L.P. and Summit Partners Private Equity Fund VII-B, L.P. Summit Master Company, LLC is the managing member of Summit Investors Management, LLC, which is the manager of Summit Investors I, LLC, and the general partner of Summit Investors I (UK), L.P. Summit Master Company, LLC, as the managing member of Summit Investors Management, LLC has delegated investment decisions, including voting and dispositive power, to Summit Partners, L.P. and its Investment Committee responsible for voting and investment decisions with respect to the Issuer. Summit Partners, L.P., through a two-person Investment Committee responsible for voting and investment decisions with respect to the Issuer, currently composed of Martin Mannion and Peter Y. Chung, has voting and dispositive authority over the shares held by each of these entities and therefore may be deemed to beneficially own such shares. In addition, Mr. Chung is a member of Summit Master Company, LLC. Each of the Summit entities mentioned herein, Summit Partners, L.P., Summit Master Company, LLC, Mr. Mannion and Mr. Chung disclaims beneficial ownership of the shares of Common Stock and the restricted stock units, except to the extent of their pecuniary interest therein. Form 2 of 2 Summit Partners, L.P., by Robin W. Devereux, POA for Joseph F. Trustey, Member 2015-05-19 Summit Investors Management, LLC, by Summit Master Company, LLC, its Managing Member, by Robin W. Devereux, POA for Joesph F. Trustey, Member 2015-05-19 Summit Investors I (UK), L.P., by Summit Investors Management, LLC, its General Partner, by Summit Master Company, LLC, its Managing Member, by Robin W. Devereux, POA for Joseph F. Trustey, Member 2015-05-19 Summit Investors I, LLC, by Summit Investors Management, LLC, its Manager, by Summit Master Company, LLC, its Managing Member, by Robin W. Devereux, POA for Joseph F. Trustey, Member 2015-05-19 Summit Partners PE VII, L.P., by Summit Partners PE VII, LLC, its General Partner, by Summit Partners, L.P., its Manager, by Robin W. Devereux, POA for Joseph F. Trustey, Member 2015-05-19 Summit Partners PE VII, LLC, by Summit Partners, L.P., its Manager, by Robin W. Devereux, POA for Joseph F. Trustey, Member 2015-05-19 Summit Partners Private Equity Fund VII-A, L.P., by Summit Partners PE VII, L.P., its GP, by Summit Partners PE VII, LLC, its GP, by Summit Partners, L.P., its Managing Member, by Robin W. Devereux, POA for Joseph F. Trustey, Member 2015-05-19 Summit Partners Private Equity Fund VII-B, L.P., by Summit Partners PE VII, L.P., its GP, by Summit Partners PE VII, LLC, its GP, by Summit Partners, L.P., its Managing Member, by Robin W. Devereux, POA for Joseph F. Trustey, Member 2015-05-19 Robin W. Devereux, POA for Martin J. Mannion 2015-05-19 Summit Master Company, LLC, by Robin W. Devereux, POA for Joseph F. Trustey, Member 2015-05-19