Paris, France - September 19, 2005  — MatrixOne, Inc. (NASDAQ: MONEE), a leading provider of collaborative product lifecycle management (PLM) solutions for the value chain , today announced that the Legrand Group, the world specialist in products and systems for electrical installations and information networks, has selected the MatrixOne PLM platform as the cornerstone of its product development environment. To be deployed throughout the Legrand Group, the MatrixOne solution will enable the Group's international product development teams to access, organize and share critical new product development information in real-time.

The decision to select the MatrixOne PLM platform was driven by a number of factors including Legrand's requirements for scalability, collaboration, ease-of-use and personalization.

"The MatrixOne solution is extremely user-friendly, with a much more natural man/machine interface than our previous solution," said Jean-Paul Chanal, the PDM project manager for Legrand. "Its ease-of-use is an important point worth highlighting, as we are now able to share data via our intranet across all the sites of the Group using a standard IT architecture. Another decisive criterion was the high level of personalization possible. We need a solution that can adapt to the company's requirements, and MatrixOne delivers that flexibility. We now have the capacity internally to execute specific settings and configurations as required."

"The MatrixOne platform saves us an enormous amount of time at the design and concept stages," continues Chanal. "Not only because of the ease of use, but also thanks to the reliable distribution of product data to our global teams. The fact that everyone has access to the most recent version makes file management much less time-consuming and labor-intensive. Furthermore, by integrating our mechanical and electronic CAO solutions, we can synchronize product design across engineering disciplines. The whole product development process thereby becomes more efficient and less costly and we reduce our time-to-market. That is the real added value of the MatrixOne solution."

"By deploying the MatrixOne platform, Legrand is enabling its geographically dispersed work teams to collaborate better and stay connected through access to real-time information," said Henri Carasso, General Manager for MatrixOne Southern Europe. "This eliminates communication barriers and drives faster decision-making, delivering higher levels of quality and innovation, and ultimately giving Legrand a competitive advantage over other players in the market."

About Legrand

Legrand is the world specialist in products and systems for electrical installations and information networks used in residential and commercial buildings and in industry. Its catalogues feature over 130,000 products and it operates in more than 60 countries, employing 26,000 people.

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.