UNITED
STATES
SECURITIES
AND EXCHANGE COMMISSION
Washington,
D.C. 20549
SCHEDULE
13G
(Rule
13d-102)
INFORMATION
TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO
RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
PURSUANT
TO RULE 13d-2(b)
(Amendment
No. ___)*
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Entegris,
Inc.
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(Name
of Issuer)
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Common
Stock, $.01 par value per share
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(Title
of Class of Securities)
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29362U104
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(CUSIP
Number)
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December
31, 2009
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(Date
of Event which Requires Filing of this
Statement)
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Check the
appropriate box to designate the rule pursuant to which this Schedule is filed:
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Rule
13d-1(b)
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o
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Rule
13d-1(c)
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o
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Rule
13d-1(d)
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*The
remainder of this cover page shall be filled out for a reporting person’s
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The
information required in the remainder of this cover page shall not be deemed to
be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934
or otherwise subject to the liabilities of that section of the Act but shall be
subject to all other provisions of the Act (however, see the
Notes).
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CUSIP
No. 29362U104
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13G
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Page 2
of 5 Pages
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1
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NAMES
OF REPORTING PERSONS
I.R.S.
IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Chilton
Investment Company, LLC
87-0742367
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2
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CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See
Instructions)
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(a)
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o
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(b)
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x
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3
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SEC
USE ONLY
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4
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CITIZENSHIP
OR PLACE OF ORGANIZATION
State
of Delaware
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NUMBER
OF
SHARES
BENEFICIALLY
OWNED
BY
EACH
REPORTING
PERSON
WITH
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5.
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SOLE
VOTING POWER
7,401,055
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6.
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SHARED
VOTING POWER
0
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7.
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SOLE
DISPOSITIVE POWER
7,401,055
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8.
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SHARED
DISPOSITIVE POWER
0
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9.
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AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
7,401,055
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10.
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CHECK
IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See
Instructions)
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11.
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PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
5.7%
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12.
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TYPE
OF REPORTING PERSON (See Instructions)
IA
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CUSIP
No. 29362U104
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13G
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Page 3
of 5 Pages
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Item
1(a).
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Name
of Issuer.
Entegris,
Inc.
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Item
1(b).
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Address
of Issuer’s Principal Executive Offices.
129
Concord Road, Billerica, MA 01821
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Item
2(a).
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Names
of Person Filing.
Chilton
Investment Company, LLC
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Item
2(b).
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Address
of Principal Business Office or, if None, Residence.
1266
East Main Street, 7th
Floor
Stamford,
CT 06902
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Item
2(c).
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Citizenship.
State
of Delaware
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Item
2(d).
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Title
of Class of Securities.
Common
Stock, $.01 par value
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Item
2(e).
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CUSIP
Number.
29362U104
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Item
3. If This Statement is Filed Pursuant to Rule 13d-1(b),
or 13d-2(b) or (c), Check
Whether
the Person Filing is a:
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(a)
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o |
Broker
or dealer registered under Section 15 of the Exchange
Act.
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(b)
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o
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Bank
as defined in Section 3(a)(6) of the Exchange Act.
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(c)
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o |
Insurance
company as defined in Section 3(a)(19) of the Exchange
Act.
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(d)
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o |
Investment
company registered under Section 8 of the Investment Company
Act.
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(e)
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x |
An
investment adviser in accordance with Rule
13d-1(b)(1)(ii)(E);
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(f)
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o |
An
employee benefit plan or endowment fund in accordance with Rule
13d-1(b)(1)(ii)(F);
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(g)
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o |
A
parent holding company or control person in accordance with Rule
13d-1(b)(1)(ii)(G);
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(h)
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o |
A
savings association as defined in Section 3(b) of the Federal Deposit
Insurance Act;
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(i)
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o |
A
church plan that is excluded from the definition of an investment company
under
Section
3(c)(14) of the Investment Company Act;
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(j)
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o |
Group,
in accordance with Rule
13d-1(b)(1)(ii)(J).
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CUSIP
No. 29362U104
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13G
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Page 4
of 5 Pages
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Item
4.
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Ownership.
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(a) Amount
beneficially owned: 7,401,055 shares
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(b) Percent
of class: 5.7%
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(c) Number
of shares as to which the person
has:
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(i)
(ii)
(iii)
(iv)
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Sole
power to vote or to direct the vote: 7,401,055
Shared
power to vote or to direct the vote: 0
Sole
power to dispose or to direct the disposition
of: 7,401,055
Shared
power to dispose or to direct the disposition
of: 0
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Item
5.
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Ownership
of Five Percent or Less of a Class.
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If
this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more
than five percent of the class of securities, check the
following o.
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Item
6.
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Ownership
of More than Five Percent on Behalf of Another Person.
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Inapplicable.
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Item
7.
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Identification
and Classification of the Subsidiary Which Acquired the Security Being
Reported on by the Parent Holding Company or Control
Person.
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Inapplicable.
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Item
8.
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Identification
and Classification of Members of the Group.
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Inapplicable.
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Item
9.
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Notice
of Dissolution of Group.
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Inapplicable.
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CUSIP
No. 29362U104
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13G
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Page 5
of 5 Pages
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Item
10.
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Certifications.
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By
signing below I certify that, to the best of my knowledge and belief, the
securities referred to above were not acquired and are not held for the
purpose of or with the effect of changing or influencing the control of
the issuer of the securities and were not acquired and are not held in
connection with or as a participant in any transaction having that purpose
or effect.
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SIGNATURE
After
reasonable inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and correct.
Date: February
12, 2010
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Chilton
Investment Company, LLC
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| By: |
/s/
James Steinthal
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| Name: |
James
Steinthal
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| Title: |
Executive
Vice President
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