Files Annual Report on Form 10-K for Fiscal Year 2008

Filing of 10-Q brings company current with SEC filing requirements Reports its first quarter under the new aspenONE subscription-based licensing model

Aspen Technology Announces Date of Selected Preliminary Fiscal 2009 Third-Quarter Financial Results Release, Conference Call and Webcast

AspenTech’s Aspen Licensing Center Provides Customers Insight to Replicate Best Practices Across the Enterprise

AspenTech’s 2008 User Conferences Highlight Best Practices in Operational Excellence

AspenTech Software Used by Process Manufacturing Industry to Combat Global Warming

AspenTech Simplifies Enterprise Rollout and Management of AspenONE Using Latest Microsoft Technologies

AspenTech’s Patented aspenONE Master Data Model Delivers Asset Lifecycle Management

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

Aspen Technology Announces Closure of FTC Investigation and Agreement to Modify Consent Decree