X0306 4 2018-06-26 0 0001637913 Milacron Holdings Corp. MCRN 0001645726 Chalmers Bruce A. C/O MILACRON HOLDINGS CORP. 10200 ALLIANCE ROAD, SUITE 200 CINCINNATI OH 45242 0 1 0 0 Chief Financial Officer Common Stock, par value $0.01 per share 2018-06-26 4 S 0 5007 18.7128 D 148769 D This transaction was executed in multiple trades at prices ranging from $18.60 to $18.94. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. /s/ Hugh O'Donnell, as Attorney-in-Fact for Bruce A. Chalmers 2018-06-27