X0206 3 2012-10-11 0 0001476719 Crumbs Bake Shop, Inc. crbm 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 2316585 I By Limited Partnership 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. (SSFQP), Special Situations Cayman Fund, L.P. (Cayman) and Special Situations Private Equity Fund, L.P. (PE). 1,585,988 shares of Common Stock are held by SSFQP, 503,163 shares of Common Stock are held by Cayman and 227,334 shares of Common Stock are held by PE. Greenhouse individually owns 100 shares of Common Stock. The interest of Marxe and Greenhouse in the shares of Common Stock owned by SSFQP, Cayman and PE is limited to the extent of his pecuniary interest. David Greenhouse 2012-10-19 Austin Marxe 2012-10-19