The Compliance Issue: MatrixOne Delivers Call to Action for Driving Regulatory Compliance within the Product Lifecycle at European PLM Summit

Business Wire, June 20, 2005

LONDON -- MatrixOne, Inc. (NASDAQ: MONEE), a leading provider of collaborative product lifecycle management (PLM) solutions for the value chain(TM), today announced that Mike Adami-Sampson, vice president product strategy, will give a presentation at Europe's first independent cross-industry product lifecycle management forum, taking place June 22-23, 2005.

Who:   Mike Adami-Sampson, vice president, product strategy

What:  The European PLM Summit 2005 gathers the world's leading
       companies together for the very first time to learn the lessons
       of global PLM implementations from world-class organisations.

When:  The European PLM Summit 2005 will take place June 22-23, 2005.
       Mike Adami-Sampson is scheduled to present on Wednesday,
       June 22, at 10.45 a.m.

Where: ExCel, Docklands, London E16, UK

Topic: Mike Adami-Sampson will be presenting on the topic of
       "Compliance - Doing What You Need To Do."  His presentation
       will focus on the dimensions of regulatory/environmental
       compliance that have an impact on the lifecycle of products and
       best practices for managing this complex aspect of product
       development.  Adami-Sampson will discuss how to proactively
       identify ELV, ROHS and WEEE compliance issues early in the
       design process, helping companies and their supply chains
       manage product development costs under new regulations.

About MatrixOne

MatrixOne, Inc. (NASDAQ: MONEE) is a recognized leader in delivering collaborative Product Lifecycle Management (PLM) solutions. We provide flexible solutions that unleash the creative power of global value chains to inspire innovations and speed them to market. MatrixOne's customers include global leaders in the aerospace and defense, automotive, consumer products, high technology, life sciences, machinery, and the process industries, including Agilent Technologies, General Electric, Honda, Johnson Controls, Philips, Procter & Gamble, Siemens, and Toshiba. MatrixOne (http://www.matrixone.com/) is headquartered in Westford, Massachusetts with locations throughout North America, Europe, and Asia/Pacific.

MatrixOne and the MatrixOne logo are registered trademarks and "a leading provider of collaborative product lifecycle management (PLM) solutions for the value chain" is a trademark of MatrixOne, Inc. All other trademarks and service marks are the property of their respective owners.

Forward-looking statements in this release are subject to risks and uncertainties that could cause our actual results to differ materially from those anticipated. Such statements may relate, among other things, to our plans, objectives and expected financial and operating results. The risks and uncertainties that may affect forward-looking statements include, among others: poor product sales, long sales cycles, difficulty developing new products, difficulty in relationships with vendors and partners, higher risk in international operations, difficulty assimilating future acquisitions, difficulty managing rapid growth, and increased competition. For more about the risks and uncertainties of our business, see our periodic and other S.E.C. filings.