Release Details

BURLINGTON, Mass.--(BUSINESS WIRE)--Oct. 4, 2007--Aspen Technology (Nasdaq: AZPN) today announced that it received a Nasdaq Staff Determination on October 1, indicating that the Company fails to comply with the filing requirements for continued listing set forth in Marketplace Rule 4310(c)(14) as a result of its failure to file timely with the Securities and Exchange Commission its annual report on Form 10-K for the year ended June 30, 2007, and that the Company's securities are therefore subject to delisting from The Nasdaq Global Market. The Company has requested a hearing before a Nasdaq Listing Qualifications Panel to review the Staff Determination. There can be no assurance that the Panel will grant the Company's request for continued listing.

The delay in AspenTech's filing of its Form 10-K is attributed to the previously announced intention to restate certain historical financial statements. The Company is working diligently to complete its annual report on Form 10-K.

About AspenTech

AspenTech is a 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, aspenONE and the Aspen leaf logo are registered trademarks of Aspen Technology, Inc. All rights reserved.

This press release may contain forward-looking statements for purposes of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Actual results may vary significantly from AspenTech's expectations based on a number of risks and uncertainties, including, without limitation: AspenTech's plan to improve operational performance may not be implemented effectively; AspenTech has identified material weaknesses in its internal controls with respect to software license revenue recognition and other matters, that, if not remedied effectively, could result in material misstatements; risks around securities litigation and investigations; AspenTech's lengthy sales cycle makes it difficult to predict quarterly operating results; fluctuations in AspenTech's quarterly operating results; AspenTech's dependence on customers in the cyclical chemicals, petrochemicals and petroleum industries; the possibility of new accounting standards or the interpretation of existing accounting standards affecting our financial results; AspenTech's ability to raise additional capital as required; intense competition; AspenTech's need to develop and market products successfully; reliance on relationships with strategic partners; challenges associated with international operations; and other risk factors described from time to time in AspenTech's periodic reports filed with the Securities and Exchange Commission. AspenTech cannot guarantee any future results, levels of activity, performance, or achievements. AspenTech expressly disclaims any current intention to update forward-looking statements after the date of this press release.

CONTACT: Media:
Aspen Technology, Inc.
David Grip, 781-221-5273
david.grip@aspentech.com
or
Investors:
ICR
Kori Doherty, 617-956-6730
kdoherty@icrinc.com

SOURCE: Aspen Technology, Inc.