X0202 4 2005-02-01 0 0001299688 optionsXpress Holdings, Inc. OXPS 0000830588 SUMMIT PARTNERS L P 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 0 0 0 1 Mang Mbr 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 0001255670 COLLINS SCOTT C C/O SUMMIT PARTNERS 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 0 1 Indirect GP of 10% Owner 0001255672 MOHAN KEVIN P C/O SUMMIT PARTNERS 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 0 1 Indirect GP of 10% Owner 0001256100 WALSH ROBERT V C/O SUMMIT PARTNERS 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 0 0 0 1 Indirect GP of 10% Owner Common Stock 2005-02-01 4 C 0 18196074 A 18328489 I Mang Mbr of GP of 10% Owner Common Stock 2005-02-01 4 S 0 4500000 15.345 D 13828489 I Mang Mbr of GP of 10% Owner Series A Preferred Stock 2005-02-01 4 C 0 18196074 D Common Stock 18196074 0 I Mang Mbr of GP of 10% Owner Shares are held as follows: 12,333,000 shares in the name of Summit Ventures VI-A, L.P.; 5,143,358 shares in the name of Summit Ventures VI-B, L.P.; 256,493 shares in the name of Summit VI Advisors Fund, L.P.; 393,803 shares in the name of Summit VI Entrepreneurs Fund, L.P.; and 69,420 shares in the name of Summit Investors VI, L.P. Each share of Series A Preferred Stock was converted into one(1) share of Common Stock upon the completion of OXPS' initial public offering. There was no expiration date. Shares are held as follows: 12,422,748 shares in the name of Summit Ventures VI-A, L.P.; 5,180,790 shares in the name of Summit Ventures VI-B, L.P.; 258,360 shares in the name of Summit VI Advisors Fund, L.P.; 396,668 shares in the name of Summit VI Entrepreneurs Fund, L.P.; and 69,923 shares in the name of Summit Investors VI, L.P. Shares are held as follows: 3,050,026 shares in the name of Summit Ventures VI-A, L.P.; 1,271,984 shares in the name of Summit Ventures VI-B, L.P.; 63,432 shares in the name of Summit VI Advisors Fund, L.P.; 97,390 shares in the name of Summit VI Entrepreneurs Fund, L.P.; and 17,168 shares in the name of Summit Investors VI, L.P. Shares are held as follows: 9,372,722 shares in the name of Summit Ventures VI-A, L.P.; 3,908,806 shares in the name of Summit Ventures VI-B, L.P.; 194,928 shares in the name of Summit VI Advisors Fund, L.P.; 299,278 shares in the name of Summit VI Entrepreneurs Fund, L.P.; and 52,755 shares in the name of Summit Investors VI, L.P. The entities mentioned in Footnotes 1, 3, 4 and 5 are collectively referred to as "Summit Partners". Summit Partners, L.P. is the managing member 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. Messrs. Collins, Mohan and Walsh, along with Peter Y. Chung, Bruce R. Evans, Walter G. Kortschak, Martin J. Mannion, Thomas S. Roberts, E. Roe Stamps, IV, Joseph F. Trustey, Stephen G. Woodsum and Gregory M. Avis (who are included in a separate report due to the restriction on the number of joint filers in an electronic report), are the members of Summit Master Company, LLC, which is the general partner of Summit Partners, L.P., and each disclaims beneficial ownership of the shares held by Summit Partners, except to the extent of his pecuniary interest therein. Summit Partners, L.P., by Summit Master Company, LLC, Its General Partner, by Robin W. Devereux, Power of Attorney for Martin J. Mannion, Member 2005-02-03 Summit Partners VI (GP), LLC, by Robin W. Devereux, Power of Attorney for Martin J. Mannion, Member 2005-02-03 Summit Partners VI (GP), L.P., by Summit Partners VI (GP), LLC, Its General Partner, by Robin W. Devereux, Power of Attorney for Martin J. Mannion, Member 2005-02-03 Robin W. Devereux, Power of Attorney for Scott C. Collins 2005-02-03 Robin W. Devereux, Power of Attorney for Kevin P. Mohan 2005-02-03 Robin W. Devereux, Power of Attorney for Robert V. Walsh 2005-02-03