aspenONE Delivers Major Performance Improvements at PetroChina Polyethylene Plant

Aspen Technology to Present at Upcoming Investor Conferences in May

Aspen Technology Announces Date of First-Quarter Fiscal 2013 Financial Results Release, Conference Call and Webcast

Leading global energy company adopts aspenONE™ Advanced Process Control for Petroleum as standard solution to help achieve operational excellence across its worldwide refineries.

AspenTech Announces Changes to Board of Directors

Antonio Pietri, Executive VP of Worldwide Field Operations, to become CEO on October 1, 2013

Building on aspenONE V7 Innovations and Best Practice Input from Users,7.2 Release Makes Process Optimization Faster and Easier

AspenTech Customers Adopt aspenONE V7 and Increase Efficiency in Response to Challenging Economy

AspenTech Announces Accelerated Share Repurchase Program

Delivers New Aspen HYSYS®, Solids Modeling Within Aspen Plus®,New Aspen PIMS™ Platinum and Aspen Collaborative Demand Manager™, and Breakthrough Innovations in Advanced Process Control, Energy and Economic Analysis