SEC FORM 3

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Rucci Corey

(Last)

(First)

(Middle)

700 DOVER PLACE

(Street)

SOUTHLAKE

76092

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
05/07/2014

3. Issuer Name and Ticker or Trading Symbol
ENTEGRIS INC [ ENTG ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	V.P. Business Development

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	21,120.571⁽¹⁾⁽²⁾	D
Common Stock	50,000	I	By IRA

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (Right to Buy)	⁽³⁾	02/19/2018	Common Stock	9,320	$8.76	D
Employee Stock Option (Right to Buy)	⁽⁴⁾	02/19/2019	Common Stock	11,070	$9.27	D
Employee Stock Option (Right to Buy)	⁽⁵⁾	02/19/2020	Common Stock	15,800	$9.88	D
Employee Stock Option (Right to Buy)	⁽⁶⁾	02/19/2021	Common Stock	19,492	$11.71	D

Explanation of Responses:

1. These shares include a total of 10,565 restricted stock units granted on February 22, 2011, February 15, 2012, February 12, 2013 and February 11, 2014 with restrictions that lapse as follows: (i) 4,119 shares vest on February 19, 2015, (ii) 3,205 shares vest February 19, 2016, (iii) 2,126 shares vest on February 19, 2017, and (iv) 1,115 shares vest on February 19, 2018.

2. These shares include 3,906.571 shares acquired under the Entegris, Inc. Employee Stock Purchase Plan.

3. This option vests in four equal annual installments. The first three installments became exercisable on February 19, 2012, February 19, 2013 and February 19, 2014, respectively. The final installment is exercisable on February 19, 2015.

4. This option vests in four equal annual installments. The first two installments became exercisable on February 19, 2013 and February 19, 2014, respectively. The final two installments become exercisable on February 19, 2015 and February 19, 2016, respectively.

5. This option vests in four equal annual installments. The first installment became exercisable on February 19, 2014 and the next three installments become exercisable on February 19, 2015, February 19, 2016 and February 19, 2017, respectively.

6. This option vests in four equal annual installments. The first installment becomes exercisable on February 19, 2015, the next three installments become exercisable on February 19, 2016, February 19, 2017 and February 19, 2018, respectively.

Remarks:

	/s/ Peter W. Walcott, Attorney-In-Fact for Corey Rucci	05/16/2014
	** 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 5 (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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