MatrixOne to Host Seminar on Best Practices in Semiconductor Design; Speakers from Skyworks, IPextreme and Kalypso Will Discuss New Approaches to the Chip Design Process and the Benefits of Product Lifecycle Management Solutions

WESTFORD, Mass.--May 2, 2006--MatrixOne, Inc. , a leading provider of collaborative product lifecycle management (PLM) solutions for the value chain(TM), will be hosting a free half-day seminar on Thursday, May 4, 2006 at the San Jose Marriott. The seminar will be focused on the design and development challenges semiconductor companies face when bringing new products from concept to reality. In addition to speakers from MatrixOne, the event will feature product development-focused professional services firm Kalypso, semiconductor manufacturer Skyworks and semiconductor intellectual property (IP) reseller IPextreme.

PLM solutions unify and streamline processes across the product lifecycle, facilitating information sharing among employees, customers, suppliers and partners. As a result, companies are able to collaboratively develop, build and manage products easily and cost-effectively. PLM solutions can help semiconductor companies better manage common challenges such as globally dispersed design teams, system-on-a-chip (SOC) development and the move to 65nm design.

MatrixOne's Jym Leonardi, semiconductor industry solutions architect, and Rick Stanton, director, high tech industry solutions will review successful PLM implementations at semiconductor companies, offer tips for how to know when your organization is ready for PLM and will discuss how to get started with a PLM implementation.

Bill Poston, founding principal of Kalypso, will discuss the typical product development challenges faced by semiconductor companies and how PLM can help companies reduce design and development costs, leverage design expertise, improve quality and accelerate time-to-market. Rounding out the agenda, MatrixOne customers will speak: Warren McArthur, manager EDA and engineering computing at Skyworks will present his company's vision for PLM and discuss expected benefits; Trent Poltronetti, vice-president of marketing at IPextreme will speak on structural changes in the semiconductor design industry.

      What: A free half-day seminar for semiconductor companies,
            entitled "Tame Your Semiconductor Design Process: Best
            Practices from Concept to Silicon."

When/Where: Thursday May 4, 2006
            San Jose Marriott
            301 South Market Street
            San Jose, CA  95113

       Who: Speakers from MatrixOne, Skyworks, IPextreme and Kalypso
            will share their experiences in using PLM to solve several
            of the challenges chip design companies are facing.

 To Register: Please see
            http://matrixone.ed4.net/profile/61/signup.cfm?L=5765379
            to register, or contact events@matrixone.com with any
            questions.

About MatrixOne, Inc.

MatrixOne, Inc. , a leading global provider of collaborative product lifecycle management (PLM) software and services, enables companies to accelerate product innovation to achieve top line revenue growth and improve bottom line profitability. With world-class PLM solutions and a commitment to customer success, MatrixOne is focused on helping companies across the automotive, aerospace & defense, consumer, machinery, medical device, semiconductor and high-tech industries solve their most challenging new product development and introduction problems. More than 850 companies use MatrixOne's solutions to drive business value and gain a competitive advantage, including industry leaders such as BAE Systems, Bosch, Comau, General Electric, Honda, Johnson Controls, Linde AG, NCR, New Balance, Nokia, Philips, Porsche, Procter & Gamble, Sony Ericsson, STMicroelectronics and Toshiba. MatrixOne (www.matrixone.com) is headquartered in Westford, Massachusetts, with locations throughout North America, Europe and Asia-Pacific. On March 1, 2006, Dassault Systemes entered into a definitive agreement to acquire MatrixOne, Inc., subject to customary closing conditions.

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.