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

April 16, 2007

CAMBRIDGE, Mass.--(BUSINESS WIRE)--April 16, 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 third quarter, ended March 31, 2007, before the U.S. financial markets open on May 9, 2007.

In conjunction with this announcement, AspenTech will host a conference call and webcast on May 9, 2007, at 8:30am (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 5774680. Interested parties may also listen to a live webcast of the call by logging on to the Investor Relations section of AspenTech's website,, 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 5774680 through May 16, 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

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

Aspen Technology, Inc.
Jeannine McDonough, 617-949-1276
Integrated Corporate Relations
Kori Doherty, 617-956-6730

Aspen Technology, Inc.