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

August 13, 2007

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Aug. 13, 2007--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.

About AspenTech

AspenTech is a recognized expert and leading provider of award-winning process optimization software and services. AspenTech's integrated aspenONE(TM) solutions enable manufacturers to reduce costs, increase capacity, and optimize operational performance end-to-end throughout the engineering, plant operations, and supply chain management processes, resulting in millions of dollars in cost savings. For more information, visit www.aspentech.com.

(C) 2007 Aspen Technology, Inc. AspenTech(R), aspenONE(TM) and the Aspen leaf logo are registered trademarks of Aspen Technology, Inc. All rights reserved.

CONTACT: Media:
Aspen Technology, Inc.
Elisa Logan, 617-949-1398
Elisa.logan@aspentech.com
or
Investors:
ICR
Kori Doherty, 617-956-6730
kdoherty@icrinc.com

SOURCE: Aspen Technology, Inc.