X0202 4 2006-08-17 0 0001329919 Vocus, Inc. VOCS 0001346053 Lazard Technology Partners 5335 WISCONSIN AVENUE, NW SUITE 410 WASHINGTON DC 20015 0 0 1 0 0001352821 Lazard Alternative Investments LLC 5335 WISCONSIN AVENUE, NW SUITE 410 WASHINGTON DC 20015 0 0 1 0 0001352790 LTP II GenPar LLC 5335 WISCONSIN AVENUE, NW SUITE 410 WASHINGTON DC 20015 0 0 1 0 0001352788 LTP II LP 5335 WISCONSIN AVENUE, NW SUITE 410 WASHINGTON DC 20015 0 0 1 0 0001352787 Planitzer Russell E 5335 WISCONSIN AVENUE, NW SUITE 410 WASHINGTON DC 20015 0 0 1 0 0001352786 Rana Manu S 5335 WISCONSIN AVENUE, NW SUITE 410 WASHINGTON DC 20015 0 0 1 0 Common Stock 2006-08-17 4 S 0 257749 13.75 D 2103457 D Lazard Technology Partners II LP is the record holder of the securities and Lazard Alternative Investments LLC is the nominee for Lazard Technology Partners II LP with regard to such securities. As the general partner of both Lazard Technology Partners II LP and Lazard Alternative Investments LLC, LTP II LP may be deemed a beneficial owner of the securities. As the general partner of LTP II LP, LTP II GenPar LLC may also be deemed to be a beneficial owner of the securities. In their capacities as principals and/or managing principals, as applicalbe, of LTP II GenPAr LLC, each of Russell E. Planitzer and Manu S. Rana may also be deemed to be beneficial owners of the securities. Each Joint Filer, other than Lazard Technology Partners II LP expressly disclaims beneficial ownership of the securities, except to the extent of his or its pecuniary interest therein, if any. Melissa Gilmore, Attorney-in-fact 2006-08-21