X0303 4 2010-04-27 1 0001059786 MIPS TECHNOLOGIES INC MIPS 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 2010-04-27 4 S 0 100000 5.105 D 4526564 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, LP (QP), Special Situations Cayman Fund, L.P. (Cayman), Special Situations Technology Fund, LP (TN) and Special Situations Technology Fund II, L.P. (T2), respectively. 454,828 shares of Common Stock are held by QP, 159,500 shares of Common Stock are held by Cayman, 590,827 shares of Common Stock are held by TN and 3,421,409 shares of Common Stock are held by T2. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, Cayman, TN and T2 is limited to the extent of his pecuniary interest. This is a weighted average price. Austin W. Marxe 2010-04-29 David M. Greenhouse 2010-04-29