Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Beckman Bruce W.
 2. Date of Event Requiring Statement (Month/Day/Year)
02/12/2018		 3. Issuer Name and Ticker or Trading Symbol
ENTEGRIS INC [ENTG]
(Last)
(First)
(Middle)
C/O ENTEGRIS, INC., 129 CONCORD ROAD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP, Finance
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

BILLERICA, MA 01821		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 15,950.972 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to Buy)   (2) 02/19/2024 Common Stock 8,560 (3) $ 21.6 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Beckman Bruce W.
C/O ENTEGRIS, INC.
129 CONCORD ROAD
BILLERICA, MA 01821		       SVP, Finance  

Signatures

/s/ Sue Lee, Attorney-In-Fact for Bruce W. Beckman 02/14/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) These shares include a total of 12,280 restricted stock units granted on April 29, 2015, February 24, 2016 and February 14, 2017 with restrictions that lapse as follows: (i) 1,861 shares vest on May 15, 2018, (ii) 1,861 shares vest on May 15, 2019, (iii) 2,621 shares vest on February 19, 2018, (iv) 2,621shares vest on February 19, 2019, (v) 2,621 shares vest on February 19, 2020, and (vi) 695 shares vest on February 19, 2021.
(2) This option vests in four equal installments beginning on February 19, 2018 and thereafter on February 19, 2019, February 19, 2020 and February 19, 2021.
(3) Awarded pursuant to the Entegris, Inc. 2010 Stock Plan, as amended, in consideration of services as an employee.

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