X0304 4 2012-02-03 0 0000857005 PARAMETRIC TECHNOLOGY CORP PMTC 0001186556 HARRISON C RICHARD 140 KENDRICK STREET NEEDHAM MA 02494 1 1 0 0 Executive Chairman Common Stock 2012-02-03 4 M 0 66818 8.50 A 1287196 D Common Stock 2012-02-03 4 S 0 66818 26.0008 D 1220378 D Employee Stock Option (right to buy) 8.50 2012-02-03 4 M 0 66818 0 D 2012-05-30 Common Stock 66818 161417 D This transaction was executed in multiple trades at prices ranging from $26.00 to $26.02. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The options became exercisable as to 60,000 shares on of May 30, 2003, 60,000 shares on May 30, 2004, 60,001 shares on May 30, 2005 and 59,998 shares on May 30, 2006. This amount represents the total number of derivative securities beneficially owned of the class shown. Catherine Gorecki by power of attorney filed 11/2/2007 2012-02-03