NEEDHAM, Mass.—(BUSINESS WIRE)—Dec. 14, 2005— PTC (Nasdaq: PMTC), the Product Development Company(TM), today reported that it has completed its previously announced investigation regarding irregularities in sales orders in the Asia-Pacific region. PTC has concluded that the items identified in the investigation, which principally relate to PTC's 2001-2003 fiscal years, are not material to its reported results for prior and current periods and do not require restatement of those results. For more information, please refer to PTC's 2005 Annual Report on Form 10-K, filed with the Securities and Exchange Commission today (available on PTC's investor web site at www.ptc.com/for/investors.htm).

About PTC

PTC (Nasdaq: PMTC) provides leading product lifecycle management (PLM), content management and dynamic publishing solutions to more than 40,000 companies worldwide. PTC customers include the world's most innovative companies in manufacturing, publishing, services, government and life sciences industries. PTC is included in the S&P 500 and Russell 2000 indices. For more information on PTC, please visit http://www.ptc.com.

PTC, The Product Development Company, and all PTC product names and logos are trademarks or registered trademarks of Parametric Technology Corporation or its subsidiaries in the United States and in other countries. All other companies and products referenced herein have trademarks or registered trademarks of their respective holders.

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