X0303 4 2010-05-26 0 0001003642 IMPAX LABORATORIES INC IPXL 0001245199 HSU LARRY C/O IMPAX LABORATORIES, INC. 30831 HUNTWOOD AVENUE HAYWARD CA 94544 1 1 0 0 President and CEO Common Stock 2010-05-26 4 A 0 46000 0.00 A 340793 D Common Stock 24388 I By Spouse Common Stock 2354568 I By The Hsu Family Trust Employee Stock Option (Right to Buy) 20.30 2010-05-26 4 A 0 115000 0.00 A 2020-05-26 Common Stock 115000 115000 D The option vests in four equal annual installments beginning on May 26, 2011, which is the first anniversary of the date of grant. The filing of this Statement shall not be construed as an admission (a) that the person filing this Statement is, for the purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the beneficial owner of any equity securities covered by this Statement, or (b) that this Statement is legally required to be filed by such person. /s/ James J. Devlin, Jr., by Power of Attorney 2010-05-28