X0203 3 2009-03-02 0 0001049210 VERENIUM CORP VRNM 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 8828781 I By Limited Partnerships Warrants 4.44 2013-08-27 Common Stock 562508 I By Limited Partnerships Convertible Bonds 2.13 2012-04-01 Common Stock 2347418 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) and Special Situations Cayman Fund, L.P. (Cayman). 6,757,245 shares of Common Stock are held by QP and 2,071,536 shares of Common Stock are held by Cayman. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP and Cayman is limited to the extent of his pecuniary interest. 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) and Special Situations Cayman Fund, L.P. (Cayman). 281,255 warrants are held by QP and 281,253 warrants are held by Cayman. The interest of Marxe and Greenhouse in the shares of warrants owned by QP and Cayman is limited to the extent of his pecuniary interest. The holder of the Notes and Warrants shall not have the right to convert any portion to the extent that after giving effect to such conversion, the holder would beneficially own in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such conversion. 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) and Special Situations Cayman Fund, L.P. (Cayman). 2,500,000 corporate bonds convertible into 1,173,709 shares of common stock are held by QP and 2,500,000 corporate bonds convertible into 1,173,709 shares of common stock are held by Cayman. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP and Cayman is limited to the extent of his pecuniary interest. Austin W. Marxe 2009-03-04 David M. Greenhouse 2009-03-04