X0202 4 2006-02-01 0 0001267201 SEABRIGHT INSURANCE HOLDINGS INC SEAB 0000830588 SUMMIT PARTNERS L P 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 Manager of GP of 10% Owner 0001258825 SUMMIT PARTNERS VI GP LLC 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 Indirect GP of 10% Owner 0001258826 SUMMIT PARTNERS VI GP LP 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 GP of 10% Owner 0001258824 SUMMIT PARTNERS LLC 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 Indirect GP of 10% Owner 0001258823 SUMMIT PARTNERS V LP 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 GP of 10% Owner Common Stock 2006-02-01 4 S 0 3450000 15.75 D 4095627 I Manager of GP of 10% Owner Shares of Common Stock are held in the name of Summit Ventures V, L.P.; Summit V Companion Fund, L.P.; Summit V Advisors Fund, L.P.; Summit V Advisors Fund (QP), L.P.; Summit Ventures VI-A, L.P.; Summit Ventures VI-B, L.P.; Summit VI Advisors Fund, L.P.; Summit VI Entrepreneurs Fund, L.P.; and Summit Investors VI, L.P. Summit Partners, L.P. is the manager of Summit Partners VI (GP), LLC, which is the general partner of Summit Partners VI (GP), L.P., which is the general partner of each of Summit Ventures VI-A, L.P., Summit Ventures VI-B, L.P., Summit VI Advisors Fund, L.P., Summit VI Entrepreneurs Fund, L.P. and Summit Investors VI, L.P. Summit Partners, L.P. is the manager of Summit Partners, LLC, which is the general partner of Summit Partners V, L.P., which is the general partner of each of Summit Ventures V, L.P., Summit V Companion Fund, L.P., Summit V Advisors Fund, L.P., and Summit V Advisors Fund (QP), L.P. Summit Partners, L.P. is the manager of Summit Partners VI (GP), LLC, which is the general partner of Summit Partners VI (GP), L.P., which is the general partner of each of Summit Ventures VI-A, L.P., Summit Ventures VI-B, L.P., Summit VI Advisors Fund, L.P., Summit VI Entrepreneurs Fund, L.P. and Summit Investors VI, L.P. Summit Partners, L.P. is the manager of Summit Partners, LLC, which is the general partner of Summit Partners V, L.P., which is the general partner of each of Summit Ventures V, L.P., Summit V Companion Fund, L.P., Summit V Advisors Fund, L.P., and Summit V Advisors Fund (QP), L.P. Summit Partners, L.P. has voting and dispositive authority over the shares held by each of these entities and, therefore, may beneficially own such shares. Each of Summit Partners, L.P., Summit Partners VI (GP), LLC, Summit Partners VI (GP), L.P., Summit Partners, LLC, Summit Partners V, L.P. and Summit Master Company, LLC, which is the general partner of Summit Partners, L.P., disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest. Summit Partners, L.P., by Robin W. Devereux, Power of Attorney for Peter Y. Chung, Member 2006-02-01 Summit Partners VI (GP), LLC, by Summit Partners, L.P., Its Manager, by Robin W. Devereux, Power of Attorney for Peter Y. Chung, Member 2006-02-01 Summit Partners VI (GP), L.P., by Summit Partners VI (GP), LLC, Its General Partner, by Summit Partners, L.P., Its Manager, by Robin W. Devereux, Power of Attorney for Peter Y. Chung, Member 2006-02-01 Summit Partners, LLC, by Summit Partners, L.P., Its Manager, by Robin W. Devereux, Power of Attorney for Peter Y. Chung, Member 2006-02-01 Summit Partners V, L.P. by Summit Partners, LLC, Its General Partner, by Summit Partners, L.P., Its Manager, by Robin W. Devereux, Power of Attorney for Peter Y. Chung, Member 2006-02-01