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Company Approved to Relist on NASDAQ Stock Market

BURLINGTON, Mass.–(BUSINESS WIRE)– Aspen Technology, Inc. (NASDAQ: AZPN, as of February 10, 2010) a leading provider of software and services to the process industries, today announced its financial results for its second quarter of fiscal 2010, ended December 31, 2009.

Mark Fusco, Chief Executive Officer of AspenTech, said, “We are pleased with the company’s performance in the second quarter, as solid transaction flow drove product-related bookings of approximately $95 million. Within product related bookings, the license portion was consistent with the year ago period. Early customer response to our new aspenONE licensing model has been very favorable, which is driving both renewal activity and expanded usage with customers across each of our target markets. As we look to the second half of our fiscal year, customer interest levels remain high and we are encouraged by the positive impact of our new aspenONE licensing model on both our competitive position and long-term market opportunity.”

Fusco added, “After bringing our financial statements current with the filing of our first quarter results and subsequently filing our second quarter results in a timely manner, we have been approved to relist the company’s common stock on the NASDAQ stock market effective tomorrow morning under the ticker ‘AZPN’. We are excited to complete this process so that investors can focus exclusively on AspenTech’s business performance, strong competitive position and market opportunity.”

AspenTech’s total revenue of $42.7 million decreased from $82.6 million in the second quarter of the prior year, due primarily to the ratable revenue recognition associated with the company’s new aspenONE licensing model.

For the quarter ended December 31, 2009, AspenTech reported a loss from operations of $29.3 million due primarily to the ratable revenue recognition associated with the company’s new aspenONE licensing model. For the quarter ended December 31, 2008, the company reported income from operations of $18.8 million. Net loss was $30.7 million in the second quarter of fiscal 2010, leading to net loss per basic and diluted share of $0.34 compared to net income per diluted share of $0.25 in the same period last year.

AspenTech had a cash balance of $109.4 million at December 31, 2009, compared to $109.0 million at the end of the first quarter of fiscal 2010. The company did not sell any installments receivable to raise cash during the second quarter of fiscal 2010 and it continued to reduce its secured borrowings balance, which was $96.5 million at the end of the quarter, down $12.3 million compared to $108.8 million at the end of the first quarter of fiscal 2010.

Other Second Quarter Business Metrics

Conference Call and Webcast

AspenTech will host a conference call and webcast today, February 9, at 5:00 p.m. (Eastern Time), to discuss the company’s financial results for the first quarter of fiscal 2010. The live dial-in number is (877) 245-0126, conference ID code 53424224. 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 53424224 through February 16, 2010.

About AspenTech

AspenTech is a leading supplier of software that optimizes process manufacturing – for energy, chemicals, pharmaceuticals, engineering and construction, and other industries that manufacture and produce products from a chemical process. With integrated aspenONE solutions, process manufacturers can implement best practices for optimizing their engineering, manufacturing and supply chain operations. As a result, AspenTech customers are better able to increase capacity, improve margins, reduce costs and become more energy efficient. To see how the world’s leading process manufacturers rely on AspenTech to achieve their operational excellence goals, visit www.aspentech.com.

© 2010 Aspen Technology, Inc., AspenTech, aspenONE and the Aspen leaf logo are trademarks of Aspen Technology, Inc. All rights reserved. All other trademarks are property of their respective owners.

Forward-Looking Statements

The second paragraph of this press release may contain forward-looking statements for purposes of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, including statements relating to the anticipated benefits of AspenTech’s new subscription-based licensing model. Actual results may vary significantly from AspenTech’s expectations based on a number of risks and uncertainties, including, without limitation: customers’ failure to adopt the new AspenONE licensing model at the rate expected by AspenTech or at all; AspenTech’s failure to realize the anticipated financial and operational benefits of the new AspenONE licensing model; unforeseen difficulties or uncertainties in the application of accounting standards; weaknesses in our internal controls, including our controls over the recognition of license revenue; 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.

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2009 and June 30, 2009