X0306 4 2016-03-31 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 2016-03-31 4 F 0 120 30.91 D 874 D Common Stock, Par Value $0.001 2016-04-01 4 A 0 1904 0 A 2778 D 2016 Option to Purchase 31.11 2016-04-01 4 A 0 11906 0 A 2026-03-31 Common Stock 11906 11906 D Represents the number of restricted shares granted in 2013/2014/2015 withheld for tax purposes. Includes 680 restricted shares which are subject to certain vesting and forfeiture provisions. On April 1, 2016, 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 March 31, 2017. The second installment date is March 31, 2018, followed by the third installment date on March 31, 2019. The reporting person was granted options on April 1, 2016. Options vest in 3 equal annual installments over a three year period beginning March 31, 2017. The second installment date is March 31, 2018, followed by the third installment date on March 31, 2019. /s/ Joshua S. Horenstein 2016-04-04