SEC Form 4 

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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| Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). | |

1. Name and Address of Reporting Person^*
WALCOTT PETER W

(Last) | (First) | (Middle)
25 LOWELL ROAD

(Street) 
WELLESLEY | MA | 02481

(City) | (State) | (Zip)

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)
SR V.P. & General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
01/21/2009

4. If Amendment, Date of Original Filed (Month/Day/Year)
01/23/2009

6. Individual or Joint/Group Filing (Check Applicable Line) 
X | Form filed by One Reporting Person
| Form filed by More than One Reporting Person

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 | 01/21/2009 | | S | | 0^(1) | D | $1.66 | 85,878^(1) | D |

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 Securities Underlying Derivative Security (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: 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 | | | |
Explanation of Responses:
1. This filing is being amended to adjust an overstatement of 2,808 shares sold as reported in the Form 4 filed on January 23, 2009 in Table I, Box 4 and therefore, an understatement of 2,808 in the number of shares of Common Stock beneficially owned following the otherwise accurately reported transaction as set forth in Table I, Box 5. The 2,808 shares merely represented the total of the other sales reported on January 21, 2009 and were inadvertently included as a separate sale on the Form 4. Subsequent transactions included in the Form 4 filed on January 23, 2009 and Forms 4 and Forms 4/A filed after January 23, 2009 also included the error.
Remarks:
| /s/ Peter W. Walcott | 05/11/2012
| ** Signature of Reporting Person | Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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