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	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	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* LOY BERTRAND (Last) (First) (Middle) 2 SETTLEMENT WAY (Street) ACTON MA 01720 (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) Executive V.P. & CAO
	3. Date of Earliest Transaction (Month/Day/Year) 08/06/2005
	4. If Amendment, Date of 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

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	08/06/2005		A		49,299	A	(1)	49,299	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
Employee Stock Option (right to buy)	$11.12	08/06/2005		A		76,450		(2)	12/04/2010	Common Stock	76,450	(3)	76,450	D
Employee Stock Option (right to buy)	$4.89	08/06/2005		A		52,560		(4)	12/18/2009	Common Stock	52,560	(5)	52,560	D
Employee Stock Option (right to buy)	$6.1	08/06/2005		A		18,879		(7)	12/07/2010	Common Stock	18,879	(6)	18,879	D
Employee Stock Option (right to buy)	$8.35	08/06/2005		A		30,406		(8)	11/29/2008	Common Stock	30,406	(9)	30,406	D
Employee Stock Option (right to buy)	$10.79	08/06/2005		A		59		(7)	08/10/2007	Common Stock	59	(11)	59	D
Employee Stock Option (right to buy)	$10.79	08/06/2005		A		30,406		(7)	08/10/2008	Common Stock	30,406	(10)	30,406	D

Explanation of Responses:

1. Received in exchange for 35,467 shares of Mykrolis Corporation common stock 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.

2. These options vest 25% on 12/4/2004 and quarterly therafter in 12 equal increments.

3. Received in exchange for 55,000 shares of Mykrolis Corporation common stock 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.

4. These options vest 25% on 12/18/2003 and quarterly therafter in 12 equal increments.

5. Received in the Merger in exchange for an employee stock option to acquire 37,813 shares of Mykrolis Corporation at a price of $6.80 per share.

6. Received in the Merger in exchange for an employee stock option to acquire 13,578 shares of Mykrolis Corporation at a price of $8.48 per share.

7. These options are fully vested.

8. These options vest 25% on 11/29/2002 and quarterly therafter in 12 equal increments.

9. Received in the Merger in exchange for an employee stock option to acquire 21,875 shares of Mykrolis Corporation at a price of $11.60 per share.

10. Received in the Merger in exchange for an employee stock option to acquire 21,875 shares of Mykrolis Corporation at a price of $15.00 per share.

11. Received in the Merger in exchange for an employee stock option to acquire 43 shares of Mykrolis Corporation at a price of $15.00 per share.

Remarks:

	/s/ Bertrand Loy	08/08/2005
	** 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).
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