EXHIBIT 32.2
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Amendment No. 1 to Quarterly Report on Form 10-Q/A of Aspen Technology, Inc. (the “Company”) for the period ended September 30, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Bradley T. Miller, Senior Vice President and Chief Financial Officer of the Company hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
Dated: March 14, 2007 | /s/ BRADLEY T. MILLER |
| Bradley T. Miller |
| Senior Vice President and Chief Financial Officer |
