Release Details

    CAMBRIDGE, Mass.--(BUSINESS WIRE)--June 2, 2003--

          Teleconference will be held on Monday, June 2, 2003
                       at 8:30 a.m. Eastern Time 

Aspen Technology, Inc. (Nasdaq:AZPN) today announced it will hold a conference call and webcast on Monday, June 2nd to discuss the details of the company's recently announced private equity financing. During the call, the company will also provide guidance concerning its business outlook over the next twelve months. The live dial-in number for the call is 913/981-5507.

The company also filed an 8-K and posted a presentation to its website with important, additional information relating to this announcement. Investors are encouraged to download this information prior to the conference call.

To listen to the live webcast, interested parties should access the Investor Relations section of the company's website at http://www.aspentech.com and click on the webcast hyperlink.

    What:       Conference Call & Webcast to Discuss Private Equity
                Financing

    When:       Monday, June 2, 2003, 8:30 a.m. Eastern Time

    Where:      http://www.aspentech.com

    How:        Live over the Internet -- Access the call through the
                AspenTech homepage

    Contact:    Joshua Young, Director of Investor Relations, Aspen
                Technology, Inc. 

If you are unable to listen to the live Webcast, the call will be archived on the Investor Relations section of AspenTech's website at the conclusion of the call and can also be accessed by dialing 719/457-0820 and entering in confirmation code 459086.

About AspenTech

Aspen Technology, Inc. provides industry-leading software and implementation services that enable process companies to increase efficiency and profitability. AspenTech's engineering product line is used to design and improve plants and processes, maximizing returns throughout an asset's operating life. Its manufacturing/supply chain product line allows companies to increase margins in their plants and supply chains, by managing customer demand, optimizing production, and streamlining the delivery of finished products. These two offerings are combined to create solutions for Enterprise Operations Management (EOM), integrated enterprise-wide systems that provide process manufacturers with the capability to dramatically improve their operating performance. Over 1,500 leading companies already rely on AspenTech's software, including Aventis, Bayer, BASF, BP, ChevronTexaco, Dow Chemical, DuPont, ExxonMobil, Fluor, Foster Wheeler, GlaxoSmithKline, Shell, and TotalFinaElf. For more information, visit www.aspentech.com.

    CONTACT: Aspen Technology, Inc. Joshua Young, 617/949-1274
             joshua.young@aspentech.com

    SOURCE: Aspen Technology, Inc.