X0206 3 2014-08-22 0 0001368993 WaferGen Bio-systems, Inc. WGBS 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 1400000 I By Limited Partnerships Warrants 5 2014-08-22 2019-08-22 Common Stock 1400000 I By Limited Partnerships 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, L.P. (QP), Special Situations Cayman Fund, L.P. (Cayman), Special Situations Private Equity Fund, L.P. (PE) and Special Situations Life Sciences Fund, L.P. (LS), respectively. 600,000 shares of Common Stock are held by QP, 200,000 shares of Common Stock are held by Cayman, 200,000 shares of Common Stock are held by PE and 400,000 shares of Common Stock are held by LS. The interest of Marxe, Greenhouse and Stettner in the shares of Common Stock owned by QP, Cayman, PE, and LS is limited to the extent of his pecuniary interest. This is a joint filing by Austin W. Marxe (Marxe), David M. Greenhouse (Greenhouse) and Adam Stettner (Stettner). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (QP), Special Situations Cayman Fund, LP (Cayman), Special Situations Private Equity Fund, L.P. (PE) and Special Situations Life Sciences Fund, L.P. (LS). 600,000 Warrants are held by QP, 200,000 Warrants are held by Cayman, 200,000 Warrants are held by PE and 400,000 Warrants are held by LS. The interest of Marxe, Greenhouse and Stettner in the shares of warrants owned by QP, Cayman, PE and LS is limited to the extent of his pecuniary interest. Austin W. Marxe 2014-08-28 David M. Greenhouse 2014-08-28 Adam C. Stettner 2014-08-28