X0201 3/A 1999-02-10 1999-03-02 0 0001041577 ATMI INC ATMI 0001136879 NEUGOLD DOUGLAS A 0 1 0 0 Executive Vice President Common Stock 527 D Employee Stock Option 22.25 1999-01-26 2008-01-26 Common Stock 39000 D Employee Stock Option 25.25 2000-01-01 2009-01-01 Common Stock 30000 D This amendment is being filed solely to correct the Common Stock balance owned by the reporting person upon becoming an insider. The Initial Statement of Beneficial Ownership of Securities excluded 81 shares of Common Stock held by the insider. 7,800 vest on 1/26/99, 1/26/00, 1/26/01, 1/26/02 and 1/26/03. 6,000 vest on 1/1/00, 1/1/01, 1/1/02, 1/1/03 and 1/1/04. Douglas Neugold 2004-02-12