X0306 4 2012-10-16 1 0000849502 RAMTRON INTERNATIONAL CORP RMTR 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 2012-10-16 4 U 0 4000000 3.1 D 0 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. (Cayman), Special Situations Private Equity Fund, L.P. (PE), Special Situations Technology Fund, LP. (TN) and Special Situations Technology Fund II, L.P. (T2). 0 shares of Common Stock are held by QP, 0 shares of Common Stock are held by Cayman, 0 shares of Common Stock are held by PE, 0 shares of Common Stock are held by TN and 0 shares of Common Stock are held by T2. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, Cayman, PE, TN and T2 is limited to the extent of his pecuniary interest. Austin W. Marxe 2012-10-23 David M. Greenhouse 2012-10-23