X0306 4 2013-09-04 0 0001120370 BROADWIND ENERGY, INC. BWEN 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 2013-09-04 4 S 0 6400 6.3525 D 2765263 I By Limited Partnerships This is a weighted average price. 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 Technology Fund, L.P. (Tech) and Special Situations Technology Fund II, L.P. (Tech 2). 1,455,103 shares of Common Stock are held by QP, 485,002 shares of Common Stock are held by Cayman, 115,488 shares of Common Stock are held by Tech and 709,670 shares of Common Stock are held by Tech 2. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, Cayman, Tech and Tech 2 is limited to the extent of his pecuniary interest. Austin W. Marxe 2013-09-06 David M. Greenhouse 2013-09-06