X0202 4 2008-05-02 0 0001053650 OMEGA PROTEIN CORP OME 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 2008-05-02 4 S 0 48517 15.4 D 2296201 I By Limited Partnerships Common Stock 2008-05-02 4 S 0 7083 15.4627 D 2289118 I By Limited Partnerships Common Stock 2008-05-03 4 S 0 2645 15.0576 D 2286473 I By Limited Partnerships Common Stock 2008-05-03 4 S 0 20000 15.0696 D 2266473 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) and Special Situations Private Equity Fund, L.P. (PE), respectively. 1,646,633 shares of Common Stock are held by QP, 309,920 shares of Common Stock are held by Cayman and 309,920 shares of Common Stock are held by PE. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, Cayman and PE is limited to the extent of his pecuniary interest. Austin W. Marxe 2008-05-06 David M. Greenhouse 2008-05-06