X0202 4 2004-10-01 0 0001091158 WEBSIDESTORY INC WSSI 0001258824 SUMMIT PARTNERS LLC 222 BERKELEY STREET BOSTON MA 02116 0 0 0 1 Indirect GP of 10% Owner 0001239366 CHUNG PETER Y 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 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 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 0001258823 SUMMIT PARTNERS V LP 222 BERKELEY STREET BOSTON MA 02116 0 0 0 1 GP of 10% Owner Common Stock 2004-10-01 4 C 0 2471319 A 2471319 I Indirect GP of 10% Owner Series A Convertible Redeemable Preferred Stock 2004-10-01 4 C 0 8249246 D Common Stock 852737 0 I Indirect GP of 10% Owner Series B Convertible Redeemable Preferred Stock 2004-10-01 4 C 0 5665052 D Common Stock 1618582 0 I Indirect GP of 10% Owner Not applicable. Converts 9.67 shares of Preferred into 1 share of Common Stock. Exercisable upon Initial Public Offering. These securities are preferred stock of the Issuer and do not have an expiration date. Series A Preferred shares held in the name of Summit Ventures V, L.P. are convertible into 643,565 shares of Common Stock; Series A Preferred shares held in the name of Summit V Companion Fund, L.P. are convertible into 149,817 shares of Common Stock; Series A Preferred shares held in the name of Summit V Advisors Fund, L.P. are convertible into 13,892 shares of Common Stock; and Series A Preferred shares held in the name of Summit V Advisors Fund (QP), L.P. are convertible into 45,463 shares of Common Stock. Converts 3.5 shares of Preferred into 1 share of Common Stock. Series B Preferred shares held in the name of Summit Ventures V, L.P. are convertible into 1,221,550 shares of Common Stock; Series B Preferred shares held in the name of Summit V Companion Fund, L.P. are convertible into 284,368 shares of Common Stock; Series B Preferred shares held in the name of Summit V Advisors Fund, L.P. are convertible into 26,370 shares of Common Stock; and Series B Preferred shares held in the name of Summit V Advisors Fund (QP), L.P. are convertible into 86,294 shares of Common Stock. Each reporting person is the general partner of Summit Partners V, L.P., which, in turn, is the general partner of each of the entities named in Footnote 3 above. As such, each reporting person may be deemed to beneficially own the shares of the Issuer owned directly by each of the Funds. The reporting persons disclaim beneficial ownership of such shares, and this report shall not be deemed an admission that the reporting persons are the beneficial owners of the securities for the purpose of Section 16 or for any other purpose, except to the extent of their pecuniary interest therein. Summit Partners, LLC, by Martin J. Mannion, Member 2004-10-01 Martin J. Mannion, Power of Attorney for Peter Y. Chung 2004-10-01 Martin J. Mannion, Power of Attorney for Kevin P. Mohan 2004-10-01 Martin J. Mannion, Power of Attorney for Scott C. Collins 2004-10-01 Martin J. Mannion, Power of Attorney for Robert V. Walsh 2004-10-01 Summit Partners V, L.P. by Summit Partners, LLC, Its General Partner, by Martin J. Mannion, Member 2004-10-01