Aspen Technology Announces Date of Fiscal 2007 Fourth-Quarter Financial Results Release, Conference Call and Webcast

Aspen Technology Announces Date of Fiscal 2007 Fourth-Quarter Financial Results Release, Conference Call and Webcast

Aspen Technology, Inc. (Nasdaq: AZPN), a leading provider of software and services to the process industries, today announced that the company will release financial results for its fiscal 2007 fourth quarter, ended June 30, 2007, after the U.S. financial markets close on September 12, 2007.

In conjunction with this announcement, AspenTech will host a conference call and webcast on September 12, 2007, at 4:45 pm (Eastern Time) to discuss the Company’s financial results, business outlook, and related corporate and financial matters. The live dial-in number is (877) 239-3024, conference ID code 12769903.

Interested parties may also listen to a live webcast of the call by logging on to the Investor Relations section of AspenTech’s website, http://www.aspentech.com/corporate/investor.cfm, and clicking on the “webcast” link. A replay of the call will be archived on AspenTech’s website and will also be available via telephone at (800) 642-1687 or (706) 645-9291, conference ID code 12769903 through September 19, 2007.