Messer Adopts Aspen Technology Software to Help Improve Efficiency and Margins

Lotte Advanced Materials Standardizes on AspenTech Manufacturing Execution Systems Softwar

Announces $100 million share repurchase program

AspenTech Software and Services Implementation Also Helps Korea’s Largest Chemical Company Achieve Operational Excellence Goals

Announces $100 Million Share Repurchase Program

Board of Directors Approve $40 Million Share Repurchase Program

aspenONE® MES Delivers Efficient Data Management, Operational Intelligence via Rich Visualization and Analytics, and Improved Production Execution To Quickly Identify and Resolve Operational Issues

Files Annual Report on Form 10-K for Fiscal Year 2009; Files Quarterly Reports on Form 10-Q for First, Second and Third Quarters Fiscal 2009; Announces Selected Preliminary Financial Results for First Quarter Fiscal 2010

Leading Energy, Chemicals, and Other Process Industry Manufacturers Gather in Seattle for AspenTech Supply Chain Management User Conference

Strong license revenue growth drives significant upside on profitability