Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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 *
  Ranaldi Robert
 2. Date of Event Requiring Statement (Month/Day/Year)
04/28/2011		 3. Issuer Name and Ticker or Trading Symbol
PARAMETRIC TECHNOLOGY CORP [PMTC]
(Last)
(First)
(Middle)
140 KENDRICK STREET		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP Worldwide Sales
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

NEEDHAM, MA 02494		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 4,613
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units   (2)   (2) Common Stock 4,578 $ (1) D  
Restricted Stock Units   (3)   (3) Common Stock 15,350 $ (1) D  
Restricted Stock Units   (4)   (4) Common Stock 17,122 $ (1) D  
Employee Stock Options (right to buy)   (5) 05/20/2013 Common Stock 5,000 (6) $ 7.725 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Ranaldi Robert
140 KENDRICK STREET
NEEDHAM, MA 02494		       EVP Worldwide Sales  

Signatures

Catherine Gorecki by power of attorney filed 5-3-2011 05/03/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) Each restricted stock unit represents a contingent right to receive one share of Parametric Technology Corporation common stock.
(2) Time-based Restricted Stock Units that vested as to 4,579 RSUs on each of November 15, 2009 and November 15, 2010 and vest as to 4,578 RSUs on November 15, 2011.
(3) Time-based Restricted Stock Units that vested as to 7,676 RSUs on November 15, 2010 and vest as to 7,675 RSUs on each of November 15, 2011 and November 15, 2012.
(4) Time-based Restricted Stock Units that vest as to 5,708 RSUs on each of November 15, 2011 and November 15, 2012, and 5,706 RSUs on November 15, 2013.
(5) Employee Stock Options granted on May 20, 2003 that vested in four equal installments of 5,000 shares each on May 20, 2004, 2005, 2006 and 2007.
(6) This amount represents the total number of derivative securities beneficially owned of the class shown.

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