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Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
SEC Accession No. 0001354488-13-000488
Filing Date
2013-02-08
Accepted
2013-02-08 09:51:57
Documents
1

Document Format Files

Seq Description Document Type Size
1 AMENDMENT NO. 7 atmi_sc13ga.htm SC 13G/A 83526
  Complete submission text file 0001354488-13-000488.txt   85189
Mailing Address 7 COMMERCE DRVIE DANBURY CT 06810-4169
Business Address 7 COMMERCE DRIVE DANBURY CT 06810-4169 2037941100
ATMI INC (Subject) CIK: 0001041577 (see all company filings)

IRS No.: 061481060 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-51731 | Film No.: 13585038
SIC: 2810 Industrial Inorganic Chemicals

Mailing Address ONE FINANCIAL CENTER 24FL BOSTON MA 02111
Business Address ONE FINANCIAL CENTER 24FL BOSTON MA 02111 6174287100
WESTFIELD CAPITAL MANAGEMENT CO LP (Filed by) CIK: 0001177719 (see all company filings)

IRS No.: 800175963 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A