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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1. Name and Address of Reporting Person * Shaner William James   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) Vice President, GM, ME Div. (Last) (First) (Middle) 9754 SUMMIT ASH COURT 3. Date of Earliest Transaction (Month/Day/Year) 01/18/2012 (Street) COLORADO SPRINGS, CO 80920 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 01/18/2012   M   7,000 A $ 2.1 62,566 D   Common Stock 01/18/2012   S   7,000 (1) D $ 9.2 55,566 D   Common Stock 01/18/2012   M   27,000 A $ 1.13 82,566 D   Common Stock 01/18/2012   S   27,000 (1) D $ 9.2 55,566 D   Common Stock 01/18/2012   M   12,374 A $ 5.4 67,940 D   Common Stock 01/18/2012   S   12,374 (1) D $ 9.2 55,566 D

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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)

$ 2.1

01/18/2012

M

7,000

(2)

12/16/2015

Common Stock

7,000

(5)

7,000

D

Employee Stock Option (Right to Buy)

$ 1.13

01/18/2012

M

27,000

(3)

02/19/2016

Common Stock

27,000

(5)

27,000

D

Employee Stock Option (Right to Buy)

$ 5.4

01/18/2012

M

12,374

(4)

02/19/2017

Common Stock

12,374

(5)

24,746

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Shaner William James 9754 SUMMIT ASH COURT COLORADO SPRINGS, CO 80920			Vice President, GM, ME Div.

Signatures

/s/ Peter W. Walcott, Attorney-In-Fact for William J. Shaner		01/19/2012
**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)	These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on November 30, 2011.
(2)	These options are part of a grant that vest in four equal annual installments. The first annual installment became exercisable on 12/16/2009, the second annual installment became exercisable on 12/16/2010 and the third annual installment became exercisable on 12/16/2011. The last annual installment becomes exercisable on 12/16/2012.
(3)	These options are part of a grant that vest in three equal annual installments. The first annual installment became exercisable on 2/19/2010, the second annual installment became exercisable on 2/19/2011. The last annual installment becomes exercisable on 2/19/2012.
(4)	These options are part of a grant that vest in three equal annaul installments. The first annual installment became exercisable on 2/19/2011. The second annual installment becomes exercisable on 2/19/2012. The last annual installment becomes exercisable on 2/19/2013.
(5)	These options were granted pursuant to an employee stock option plan that provides for the grant of options in consideration of services as an employee.

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