X0306 4 2018-03-07 0001364099 Innophos Holdings, Inc. IPHS 0001670029 Horenstein Joshua 259 PROSPECT PLAINS RD. CRANBURY NJ 08512 1 Chief Legal Officer & Corp Sec Common Stock, Par Value $0.001 2018-03-07 4 A 0 2000 0 A 6001 D On March 7, 2018, these shares of restricted common stock were granted to the reporting person to be held in escrow, subject to certain vesting and forfeiture provisions. The grant vests in three equal installments over a three year period beginning on March 31, 2019, with the second installment on March 31, 2020, followed by the third installment on March 31, 2021. /s/ Joshua S. Horenstein 2018-03-08