X0306 4 2012-10-26 0001003642 IMPAX LABORATORIES INC IPXL 0001245199 HSU LARRY C/O IMPAX LABORATORIES, INC. 30831 HUNTWOOD AVENUE HAYWARD CA 94544 1 1 President and CEO Common Stock 2012-10-26 4 F 0 4409 24.34 D 130688 I By Spouse Common Stock 546060 D Common Stock 2302908 I By The Hsu Family Trust These shares of common stock were withheld by the issuer upon the vesting of three restricted stock awards to satisfy the payroll tax withholding obligations of Dr. Ann Hsu (the Reporting Person's spouse). Such withholding is treated as a disposition of securities under Section 16 of the Securities Exchange Act of 1934, as amended. 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/ Mark A. Schlossberg, by Power of Attorney 2012-10-30