0001354488-14-000539.txt : 20140207 0001354488-14-000539.hdr.sgml : 20140207 20140207090514 ACCESSION NUMBER: 0001354488-14-000539 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20140207 DATE AS OF CHANGE: 20140207 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: ATMI INC CENTRAL INDEX KEY: 0001041577 STANDARD INDUSTRIAL CLASSIFICATION: INDUSTRIAL INORGANIC CHEMICALS [2810] IRS NUMBER: 061481060 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-51731 FILM NUMBER: 14582032 BUSINESS ADDRESS: STREET 1: 7 COMMERCE DRIVE CITY: DANBURY STATE: CT ZIP: 06810-4169 BUSINESS PHONE: 2037941100 MAIL ADDRESS: STREET 1: 7 COMMERCE DRVIE CITY: DANBURY STATE: CT ZIP: 06810-4169 FORMER COMPANY: FORMER CONFORMED NAME: ATMI HOLDINGS INC DATE OF NAME CHANGE: 19970625 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: WESTFIELD CAPITAL MANAGEMENT CO LP CENTRAL INDEX KEY: 0001177719 IRS NUMBER: 800175963 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: ONE FINANCIAL CENTER STREET 2: 24FL CITY: BOSTON STATE: MA ZIP: 02111 BUSINESS PHONE: 6174287100 MAIL ADDRESS: STREET 1: ONE FINANCIAL CENTER STREET 2: 24FL CITY: BOSTON STATE: MA ZIP: 02111 FORMER COMPANY: FORMER CONFORMED NAME: WESTFIELD CAPITAL MANAGEMENT CO LLC DATE OF NAME CHANGE: 20020717 SC 13G/A 1 west_sc13ga.htm SCHEDULE 13G/A west_sc13ga.htm


UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
SCHEDULE 13G
 
Under the Securities Exchange Act of 1934

(Amendment No.  8)*
 
 
ATMI Inc
 
 
(Name of Issuer)
 
     
  Common Stock  
 
(Title of Class of Securities)
 
     
 
00207R101
 
 
(CUSIP Number)
 
     
 
December 31, 2013
 
 
(Date of Event Which Requires Filing of this Statement)
 
     
Check the appropriate box to designate the rule pursuant to which this Schedule is filed
 
þ Rule 13d-1(b)
o Rule 13d-1(c)
o Rule 13d-1(d)
 
*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 (“Act”) 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).

Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
 


 
 

 
CUSIP No. 00207R101
 
1.
Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).
 
Westfield Capital Management Company, LP
 
#80-0175963
2.
Check the Appropriate Box if a Member of a Group (See Instructions)
 
(a)  o
(b)  o
3.
SEC Use Only
 
4.
Citizenship of Place of Organization
 
Massachusetts
Number of Shares
Beneficially
Owned by Each
Reporting  Person
With
5.
Sole Voting Power 
 
0
6.
Shared Voting Power
 
0
7. 
Sole Dispositive Power 
 
0
8.
Shared Dispositive Power
 
0
9.
Aggregate Amount Beneficially Owned by each Reporting Person
 
0
10.
Check if the Aggregate Amount in Row (9) Excludes Certain Shares  o
 
 
11.
Percent of Class Represented by Amount in Row 9
 
0%
12.
Type of Reporting Person (See Instructions)
 
IA
 
 
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ITEM 1:
 
(a)  Name of Issuer:
 
ATMI Inc.
 
 (b)  Address of Issur’s Principal Executive Offices:
 
7 Commerce Drive
Danbury, CT 06810
 
ITEM 2:
 
(a)  Name of Person Filing:
 
Westfield Capital Management Company, LP
 
(b)  Address of Principal Business Office or, if None, Residence:
 
1 Financial Center, Boston, Massachusetts 02111
 
(c)  Citizenship:
 
Massachusetts
 
(d)  Title of Class of Securities:
 
Common Stock
 
(e)  CUSIP Number:
 
00207R101
 
ITEM 3:  IF THIS STATEMENT IS FILED PURSUANT TO §§240.13D-1(B) OR 240.13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A:
 
            
(a)     
o     
 Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
       
 
(b) 
o
 Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
       
 
(c) 
o
 Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
       
 
(d) 
o
 Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8);
       
 
(e) 
þ
 An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
       
 
(f) 
o
 An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
       
 
(g) 
o
 A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
       
 
(h) 
o
 A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
       
 
(i) 
o
 A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
       
 
(j) 
o
 A non-U.S. institution, in accordance with §240.13d-1(b)(1)(ii)(J);
       
 
(k) 
o
 Group, in accordance with §240.13d-1(b)(1)(ii)(K).
   
 
 
 If filing as a non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the type of institution: ___________________________.
 
 
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ITEM 4:  OWNERSHIP.

(a)  Amount beneficially owned: 0
 
(b)  Percent of class: 0%

(c)  Number of shares as to which the person has:
 
                     (i)    Sole power to vote or to direct the vote 0  
  (ii)    Shared power to vote or to direct the vote
0
 
  (iii)    Sole power to dispose or to direct the disposition of 0  
  (iv)    Shared power to dispose or to direct the disposition of    0  
 
ITEM 5:   OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
 
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 þ.
 
Instruction: Dissolution of a group requires a response to this item.
 
ITEM 6:   OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
 
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than five percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.

ITEM 7:   IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.
 
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
 
Not Applicable
 
ITEM 8:   IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
 
If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group.
 
Not Applicable
 
ITEM 9:   NOTICE OF DISSOLUTION OF GROUP.
 
Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5.

Not Applicable
 
ITEM 10:  CERTIFICATIONS.
 
a) The following certification shall be included if the statement is filed pursuant to §240.13d-1(b):
 
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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.
 
   
     
February 7, 2014
By:
/s/ Brandi McMahon
   
Brandi McMahon, Compliance Manager
     
 
The original statement shall be signed by each person on whose behalf the statement is filed or his authorized representative. If the statement is signed on behalf of a person by his authorized representative other than an executive officer or general partner
of the filing person, evidence of the representative’s authority to sign on behalf of such person shall be filed with the statement, provided, however, that a power of attorney for this purpose which is already on file with the Commission may be incorporated by reference. The name and any title of each person who signs the statement shall be typed or printed beneath his signature.
 
NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties for whom copies are to be sent.
 
Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001)

 
 
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