X0306 4 2016-05-14 0001003642 IMPAX LABORATORIES INC IPXL 0001553489 Reasons Bryan M. C/O IMPAX LABORATORIES, INC. 30831 HUNTWOOD AVENUE HAYWARD CA 94544 1 Chief Financial Officer Common Stock 2016-05-14 4 F 0 1889 29.18 D 89921 D Common Stock 2016-05-15 4 F 0 1216 29.18 D 88705 D These shares of common stock were withheld by the issuer upon the vesting of a restricted stock award to satisfy Mr. Reason's payroll tax withholding obligations. 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 2016-05-16