X0306 4 2017-12-04 0 0001637913 Milacron Holdings Corp. MCRN 0001645268 Boots Ira G 10200 ALLIANCE ROAD SUITE 200 CINCINNATI OH 45242 1 0 0 0 Common Stock, par value $0.01 per share ("Common Stock") 2017-12-04 4 M 0 29950 6.64 A 29950 I Held by Boots Family Trust #1 Common Stock 2017-12-04 4 S 0 29950 18.25 D 0 I Held by Boots Family Trust #1 Common Stock 2017-12-05 4 M 0 4479 6.64 A 4479 I Held by Boots Family Trust #1 Common Stock 2017-12-05 4 S 0 4479 18.25 D 0 I Held by Boots Family Trust #1 Common Stock 2017-12-05 4 M 0 8648 6.64 A 8648 I Held by Boots Family Trust #1 Common Stock 2017-12-05 4 S 0 8648 18.25 D 0 I Held by Boots Family Trust #1 Common Stock 39989 D Stock Option (right to buy) 6.64 2017-12-04 4 M 0 29950 6.64 D 2022-04-30 Common Stock 29950 163099 I Held by Boots Family Trust #1 Stock Option (right to buy) 6.64 2017-12-05 4 M 0 4479 6.64 D 2022-04-30 Common Stock 4479 158620 I Held by Boots Family Trust #1 Stock Option (right to buy) 6.64 2017-12-05 4 M 0 8648 6.64 D 2022-04-30 Common Stock 8648 149972 I Held by Boots Family Trust #1 The securities were directly held by the Boots Family Trust #1, of which Mr. Boots is the sole trustee, for the benefit of Mr. Boots' spouse, parents, siblings or lineal descendants, and may be deemed to be held by the Reporting Person. Weighted average price. These shares were sold in multiple transactions at prices ranging from $18.25 to $18.30, inclusive. The reporting person undertakes to provide to Milacron Holdings Corp., any security holder of Milacron Holdings Corp., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Includes 13,595 restricted stock units that represent the right to receive, at settlement, one share of common stock, which are subject to vesting and forfeiture and which vest on February 27, 2018. Prior to vesting, the restricted stock units do not include any voting rights. The option was granted on 4/30/2012 and this amount was vested in full as of the transaction date. /s/ Hugh O'Donnell, as Attorney-in-Fact for Ira G. Boots 2017-12-06