Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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 *
Rucci Corey
   2. Issuer Name and Ticker or Trading Symbol
ENTEGRIS INC [ENTG] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP, Business Development
(Last)
(First)
(Middle)
C/O ENTEGRIS, INC., 129 CONCORD ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
03/09/2018
(Street)

BILLERICA, MA 01821		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/09/2018   M   3,599 A $ 13.49 24,664.494 D  
Common Stock 03/09/2018   F   1,998 D $ 36.55 22,666.494 D  
Common Stock 03/09/2018   M   6,498 A $ 12.2 29,164.494 D  
Common Stock 03/09/2018   F   3,444 D $ 36.55 25,720.494 D  
Common Stock 03/09/2018   M   3,734 A $ 21.6 29,454.494 D  
Common Stock 03/09/2018   F   2,657 D $ 36.55 26,797.494 D  
Common Stock 03/12/2018   S   5,732 D $ 36.4274 (1) 21,065.494 D  
Common Stock               35,000 I by IRA

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to Buy) $ 13.49 03/09/2018   M     3,599   (2) 02/19/2022 Common Stock 3,599 $ 0 (3) 3,599 D  
Employee Stock Option (Right to Buy) $ 12.2 03/09/2018   M     6,498   (4) 02/19/2023 Common Stock 6,498 $ 0 (3) 12,996 D  
Employee Stock Option (Right to Buy) $ 21.6 03/09/2018   M     3,734   (5) 02/19/2024 Common Stock 3,734 $ 0 (3) 11,202 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Rucci Corey
C/O ENTEGRIS, INC.
129 CONCORD ROAD
BILLERICA, MA 01821		       SVP, Business Development  

Signatures

 /s/ Sue Lee, Attorney-In-Fact for Corey Rucci   03/13/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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) The price reported in column 4 is a weighted average price reported in reliance on a letter from the Office of Chief Counsel, Securities and Exchange Commission's Division of Corporate Finance to the Society of Corporate Secretaries and Corporate Governance Professionals dated June 25, 2008. These shares were sold in multiple transactions at prices ranging from $36.35 to $36.50, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., 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.
(2) This option vests in four equal installments. The first three installments became exercisable on February 19, 2016, February 19, 2017 and February 19, 2018, respectively. The last installment will become exercisable on February 19, 2019.
(3) This option was granted pursuant to the Entegris, Inc. 2010 Stock Plan, as amended, in consideration of services as an employee.
(4) This option vests in four equal installments. The first two installments became exercisable on February 19, 2017 and February 19, 2018, respectively. The remaining installments will become exercisable on February 19, 2019 and February 19, 2020, respectively.
(5) This option vests in four equal installments. The first installment became exercisable on February 19, 2018. The remaining installments will become exercisable on February 19, 2019, February 19, 2020 and February 19, 2021, respectively.

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