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 *
PYLE THOMAS O
   2. Issuer Name and Ticker or Trading Symbol
ENTEGRIS INC [ENTG] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
987 MEMORIAL DRIVE, APT. #272		 3. Date of Earliest Transaction (Month/Day/Year)
08/06/2005
(Street)

CAMBRIDGE, MA 02138		 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

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
Non-Employee Director Stock Option (right to buy) $ 9.4 08/06/2005   A   11,120     (1) 04/25/2015 Common Stock 11,120 (2) 11,120 D  
Non-Employee Director Stock Option (right to buy) $ 10.68 08/06/2005   A   13,900     (3) 04/28/2014 Common Stock 13,900 (4) 13,900 D  
Non-Employee Director Stock Option (right to buy) $ 5.66 08/06/2005   A   13,900     (5) 04/24/2013 Common Stock 13,900 (6) 13,900 D  
Non-Employee Director Stock Option (right to buy) $ 10.91 08/06/2005   A   6,950     (7) 04/26/2012 Common Stock 6,950 (8) 6,950 D  
Non-Employee Director Stock Option (right to buy) $ 7.46 08/06/2005   A   7,549     (9) 08/09/2006 Common Stock 7,549 (10) 7,549 D  
Non-Employee Director Stock Option (right to buy) $ 9.27 08/06/2005   A   11,322     (9) 08/09/2006 Common Stock 11,322 (11) 11,322 D  
Non-Employee Director Stock Option (right to buy) $ 10.79 08/06/2005   A   13,900     (9) 08/10/2011 Common Stock 13,900 (12) 13,900 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
PYLE THOMAS O
987 MEMORIAL DRIVE
APT. #272
CAMBRIDGE, MA 02138		   X      

Signatures

 /s/ Peter W. Walcott, attorney-in-fact for Thomas O. Pyle   08/08/2005
**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) This option vests in three (3) equal annual installments beginning 4/25/2006.
(2) Received in exchange for 8,000 shares of Mykrolis Corporation common stock at a price of $13.70 in connection with the merger of Mykrolis Corporation into Eagle DE, Inc. pursuant to Agreement and Plan of Merger, dated March 21, 2005 (the "Merger"); pursuant to the Merger Eagle DE, Inc. changed its name to Entegris, Inc.
(3) This option vests in three (3) equal annual installments beginning 4/28/2005.
(4) Received in the Merger in exchange for a non-employee director stock option to acquire 10,000 shares of Mykrolis Corporation at a price of $14.85 per share.
(5) This option vests in three (3) equal annual installments beginning 4/24/2004.
(6) Received in the Merger in exchange for a non-employee director stock option to acquire 10,000 shares of Mykrolis Corporation at a price of $7.87 per share.
(7) This option vests in three (3) equal annual installments beginning 4/26/2003.
(8) Received in the Merger in exchange for a non-employee director stock option to acquire 5,000 shares of Mykrolis Corporation at a price of $15.16 per share.
(9) This option is fully vested
(10) Received in the Merger in exchange for a non-employee director stock option to acquire 5,431 shares of Mykrolis Corporation at a price of $10.37 per share.
(11) Received in the Merger in exchange for a non-employee director stock option to acquire 8,146 shares of Mykrolis Corporation at a price of $12.887 per share.
(12) Received in the Merger in exchange for a non-employee director stock option to acquire 10,000 shares of Mykrolis Corporation at a price of $15.00 per share.

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