X0306 4 2014-02-20 0 0000751085 MAGNETEK, INC. MAG 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 2014-02-20 4 S 0 2024 24.5853 D 350453 I By Limited Partnerships Common Stock 2014-02-21 4 S 0 900 24.4411 D 349553 I By Limited Partnerships This is a weighted average price. This is a joint filing by Austin W. Marxe (Marxe), David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner). They share voting and investment control over all securities owned by Special Situations Fund III QP, LP (QP) and Special Situations Cayman Fund, L.P. (Cayman), respectively 261,207 shares of Common Stock are held by QP and 88,346 shares of Common Stock are held by Cayman. The interest of Marxe, Greenhouse and Stettner in the shares of Common Stock owned by QP and Cayman is limited to the extent of the pecuniary interest. Austin W. Marxe 2014-02-24 David M. Greenhouse 2014-02-24 Adam C. Stettner 2014-02-24