X0306 4 2018-05-09 0001101302 ENTEGRIS INC ENTG 0001198621 BRADLEY MICHAEL A C/O ENTEGRIS, INC. 129 CONCORD ROAD BILLERICA MA 01821 1 0 0 0 Common Stock 2018-05-09 4 A 0 4090 0 A 53893 D These Restricted Stock Units vest in full on the earlier of (1) the anniversary date of the grant, or (2) the date of the Company's 2019 Annual Meeting of Stockholders. These shares were awarded on May 9, 2018 as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2010 Stock Plan, which provides for the award of Restricted Stock Units to independent directors in consideration for services as such. /s/ Sue Lee, Attorney-In-Fact for Michael A. Bradley 2018-05-10