Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
HARRISON C RICHARD
   2. Issuer Name and Ticker or Trading Symbol
PARAMETRIC TECHNOLOGY CORP [PMTC] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President
(Last)
(First)
(Middle)
C/O PARAMETRIC TECHNOLOGY CORP, 140 KENDRICK ST.		 3. Date of Earliest Transaction (Month/Day/Year)
11/02/2006
(Street)

NEEDHAM, MA 02494		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 11/02/2006   S   1,000 (1) D $ 18.31 641,138 D  
Common Stock 11/02/2006   S   1,731 (1) D $ 18.32 639,407 D  
Common Stock 11/02/2006   S   3,855 (1) D $ 18.35 635,552 D  
Common Stock 11/02/2006   S   300 (1) D $ 18.36 635,252 D  
Common Stock 11/02/2006   S   1,303 (1) D $ 18.37 633,949 D  
Common Stock 11/02/2006   S   692 (1) D $ 18.45 633,257 D  
Common Stock 11/02/2006   S   2,734 (1) D $ 18.5 630,523 D  
Common Stock 11/02/2006   S   2,042 (1) D $ 18.52 628,481 D  
Common Stock 11/02/2006   S   10,941 (1) D $ 18.55 617,540 D  
Common Stock 11/02/2006   S   1,000 (1) D $ 18.7 616,540 D  
Common Stock 11/02/2006   S   443 (1) D $ 18.73 616,097 D  
Common Stock 11/02/2006   S   1,300 (1) D $ 18.76 614,797 (2) D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee stock option (right to buy) $ 24.8438 11/02/2006   M   0 (3)     (4) 09/10/2008 Common Stock 399,999 $ 0 399,999 (5) D  
Employee stock option (right to buy) $ 32.9688 11/02/2006   M   0 (3)     (6) 09/14/2010 Common Stock 299,999 $ 0 299,999 (5) D  
Employee stock option (right to buy) $ 12.575 11/02/2006   M   0 (3)     (7) 09/20/2011 Common Stock 320,000 $ 0 320,000 (5) D  
Employee stock option (right to buy) $ 8.5 11/02/2006   M   0 (3)     (8) 05/30/2012 Common Stock 239,999 $ 0 239,999 (5) D  
Employee stock option (right to buy) $ 4.975 11/02/2006   M   0 (3)     (9) 02/13/2013 Common Stock 199,999 $ 0 199,999 (5) D  
Employee stock option (right to buy) $ 4.975 11/02/2006   M   0 (3)     (10) 02/13/2013 Common Stock 319,999 $ 0 319,999 (5) D  
Employee stock option (right to buy) $ 11.475 11/02/2006   M   0 (3)     (11) 03/03/2014 Common Stock 319,999 $ 0 319,999 (5) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
HARRISON C RICHARD
C/O PARAMETRIC TECHNOLOGY CORP
140 KENDRICK ST.
NEEDHAM, MA 02494		   X     President  

Signatures

 /s/ C. Richard Harrison   11/02/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Shares sold pursuant to a pre-established Rule 10b5-1(c) trading plan that provided for the sale at market prices of a specified percentage of the Reporting Person's July 27, 2005 restricted stock award in order to satisfy current tax withholding obligations associated with the vesting of a portion of such restricted stock award.
(2) Adjusted to reflect the 2 for 5 reverse stock split of the company's Common Stock effective February 28, 2006.
(3) This option was previously reported and is now being reported (as currently outstanding) to reflect the 2 for 5 reverse stock split of the Company's Common Stock effective February 28, 2006.
(4) Employee stock option granted 9/10/1998, exercisable as to 100,001 shares on 9/10/1999, 100,000 shares on 9/10/2000, 99,999 shares on 9/10/2001, and 99,999 shares on 9/10/2002.
(5) This amount represents the total number of Derivative Securities Beneficially Owned by the class shown (i.e. the same exercise price and expiration date). The Reporting Person owns a total of 2,099,994 Options to purchase Common Stock of varying classes (i.e. varying exercise process and expiration dates).
(6) Employee stock option granted on 9/14/2000, exercisable as to 75,000 shares on 9/14/2001, 75,000 shares on 9/14/2002, 75,000 shares on 9/14/2003 and 74,999 shares on 9/14/2004.
(7) Employee stock option granted 9/20/2001, exercisable as to 80,001 shares on 9/20/2002, 80,000 shares on 9/20/2003, 79,999 shares on 9/20/2004 and 80,000 shares on 9/20/2005.
(8) Employee stock option granted 5/20/2002, exercisable as to 60,000 shares on 5/30/2003, 60,000 shares on 5/30/2004, 60,001 shares on 5/30/2005 and 59,998 shares on 5/30/2006.
(9) Employee stock option granted on 2/13/2003, exercisable as to 66,667 shares on 2/13/2004, 66,667 shares on 2/13/2005 and 66,665 shares on 2/13/2006.
(10) Employee stock option granted 2/13/2003, exercisable as to 80,000 shares on 2/13/2004, 80,000 shares on 2/13/2005, 80,000 shares on 2/13/2006 and 79,999 shares on 2/13/2007.
(11) Employee stock option granted 3/3/2004, exercisable as to 80,000 shares on 3/3/2005, 80,000 shares on 3/3/2006, 80,000 shares on 3/3/2007 and 79,999 shares on 3/3/2008.

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