X0306 4 2017-12-31 0 0001364099 Innophos Holdings, Inc. IPHS 0001660951 Mink Kim Ann 259 PROSPECT PLAINS ROAD, BUILDING A CRANBURY NJ 08512 1 1 0 0 Chairman, President and CEO Common Stock, par value $0.001 per share 2017-12-31 4 F 0 9764 46.73 D 71263 D Represents the number of shares of common stock that were withheld for tax purposes in connection with the vesting of certain restricted shares and restricted stock units. /s/ Joshua S. Horenstein, as Attorney-in-Fact 2018-01-02