ATMI INC

FY: Dec 31 2013

FY: Dec 31 2013

Q: Sep 30 2013

Q: Jun 30 2013

Q: Mar 31 2013

FY: Dec 31 2012

Q: Sep 30 2012

Q: Jun 30 2012

Q: Mar 31 2012

FY: Dec 31 2011

Q: Sep 30 2011

Q: Jun 30 2011

Q: Mar 31 2011

FY: Dec 31 2010

Q: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

FY: Dec 31 2009

Q: Sep 30 2009

Q: Jun 30 2009

Completion of Acquisition or Disposition of Assets

Submission of Matters to a Vote of Security Holders

7.01,9.01

2.01,9.01

7.01,9.01

Entry into a Material Definitive Agreement

Results of Operations and Financial Condition

1.01,8.01,9.01

8.01,9.01

2.02,9.01

2.02,9.01

7.01,9.01

5.07

2.02,9.01

5.02,9.01

5.03,9.01

5.02,9.01

2.02,9.01

2.02,9.01

2.02,9.01

Certification of termination of registration of a class of securities (Section 12(b))

Notice of Effectiveness

Notice of Effectiveness

Notice of Effectiveness

Notice of Effectiveness

Notice of Effectiveness

Post Effective Amendment to S-8

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Notification of removal from listing and/or registration on a national securities exchange

Post-effective amendment to a registration statement

No description available

No description available

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

GAMCO INVESTORS, INC. ET AL

Ward David M

NEUGOLD DOUGLAS A

Mincieli Kathleen G

MARSH C DOUGLAS

BANUCCI EUGENE G

Shima Patrick J

SHARKEY DANIEL P

SEGALL MARK B

ADLEY MARK

MAHLE STEPHEN H

SCALISE GEORGE

Kramer Christian

SHAVERS CHERYL L

Dubois Lawrence H

Carlson Timothy C

MAHLE STEPHEN H

Kramer Christian

Mincieli Kathleen G

none

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

2,5