X0202 4 2006-11-21 0 0001095315 PFSWEB INC PFSW 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M C/O SPECIAL SITUATIONS FUNDS 527 MADISON AVENUE, SUITE 2600 NEW YORK NY 10022 0 0 1 0 Common Stock 2006-11-21 4 P 0 37221 0.6954 A 6488078 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (QP), Special Situations Cayman Fund, L.P. (CAY) and Special Situations Private Equity Fund, L.P. (PE), respectively . 3,883,485 shares of Common Stock are owned by QP, 1,086,616 shares of Common Stock are owned by CAY and 1,517,977 shares of Common Stock are owned by PE. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, CAY and PE is limited to the extent of his pecuniary interest. Austin W. Marxe 2006-11-22 David M. Greenhouse 2006-11-22