MatrixOne to Release Second Quarter Financial Results on February 8, 2006

MatrixOne, Inc. (NASDAQ: MONE), a leading provider of
collaborative product lifecycle management (PLM) solutions for the
value chain(TM), today announced that it will release financial
results for the second quarter ended December 31, 2005 on Wednesday,
February 8, 2006 after the market closes. The Company's management
team plans to host a live conference call and webcast at 5:00 p.m.
eastern time on that day to discuss the financial results as well as
management's outlook for the business. The conference call may be
accessed in the United States by dialing [phone] and using
passcode "MONE". The conference call may be accessed outside of the
United States by dialing [phone] and using passcode "MONE". The
conference call will be simultaneously webcast on the Company's
Investor Relations website, which can be accessed at
www.matrixone.com/investor. A replay of the webcast will be available
approximately two hours after the call.

   About MatrixOne

   MatrixOne, Inc. (NASDAQ: MONE), 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 800
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, 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.

   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.