Aspen Technology Announces Date and Time of Its Fourth Quarter and Fiscal Year Earnings Release; Earnings Release To Be Issued on August 7, 2003, after Market Close

July 7, 2003

CAMBRIDGE, Mass.--(BUSINESS WIRE)--July 7, 2003--Aspen Technology, Inc. (Nasdaq:AZPN) today announced the date and time of its fourth quarter and fiscal year 2003 earnings release and webcast for the period ending, June 30, 2003. The company's management team will hold a webcast to discuss its financial results, business outlook, and related corporate and financial matters, beginning at 4:45 p.m. on Thursday, August 7, 2003. The webcast will be open to interested parties by accessing the Investor Relations section of the company's website at http://www.aspentech.com and clicking on the webcast hyperlink.

    What:    Aspen Technology's Fourth Quarter & Fiscal Year Earnings
             Release

    When:    Thursday, August 7, 2003, after market close

    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.

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.