X0206 3 2015-02-04 0 0001368993 WaferGen Bio-systems, Inc. WGBS 0001535264 AWM Investment Company, Inc. 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 2019-08-27 Common Stock 1400000 I By Limited Partnerships AWM Investment Company, Inc., a Delaware corporation (AWM), is the investment adviser to Special Situations Fund III QP, L.P. (SSFQP), Special Situations Cayman Fund, L.P. (CAYMAN), Special Situations Private Equity Fund, L.P. (SSPE) and Special Situations Life Sciences Fund, L.P. (SSLS and together with SSFQP, CAYMAN, SSPE, the Funds). As the investment adviser to the Funds, AWM holds sole voting and investment power over 600,000 shares of Common Stock of the Issuer (the Shares) and 600,000 Warrants* held by SSFQP, 200,000 Shares and 200,000 Warrants* held by CAYMAN, 200,000 Shares and 200,000 Warrants* held by SSPE, and 400,000 Shares and 400,000* Warrants held by SSLS. Austin W. Marxe (Marxe), David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner) are the controlling principals of AWM. Marxe, Greenhouse and Stettner previously reported the Shares held by the Funds on Form 3. Accordingly, reference should be made to Marxe, Greenhouse and Stettner (CIK #0001044321) for any prior filings with the Securities and Exchange Commission relating to the Shares held by each of the Funds. The reporting person disclaims beneficial ownership of the Shares and Warrants, except to the extent of its pecuniary interest therein. This report shall not be deemed an admission that the reporting person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. *The Warrants described above may be exercised to the extent that the total number of shares of Common Stock then beneficially owned does not exceed 4.99% of the outstanding shares. The holder may request an increase of up to 9.99% of the outstanding shares, effective on the 61st day after notice is given to the Company. Corrected expiration date. Adam C. Stettner 2015-02-04