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 *
  Lo Paul (Sheng-Chun)
 2. Date of Event Requiring Statement (Month/Day/Year)
09/06/2006		 3. Issuer Name and Ticker or Trading Symbol
SYNOPSYS INC [SNPS]
(Last)
(First)
(Middle)
700 EAST MIDDLEFIELD ROAD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Sr VP & GM, Analog/Mixed Signa
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

MOUNTAIN VIEW, CA 94043		 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)

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
Incentive Stock Option (right to buy) 05/18/2005 05/18/2011 Common Stock 14,984 $ 24.7979 D  
Non-Qualified Stock Option (right to buy)   (1) 10/15/2011 Common Stock 4,000 $ 16 D  
Non-Qualified Stock Option (right to buy)   (2) 12/23/2011 Common Stock 9,659 $ 17.16 D  
Non-Qualified Stock Option (right to buy)   (1) 12/10/2011 Common Stock 6,000 $ 17.58 D  
Non-Qualified Stock Option (right to buy)   (3) 08/14/2010 Common Stock 619 $ 19.2049 D  
Non-Qualified Stock Option (right to buy)   (4) 02/18/2013 Common Stock 8,000 $ 19.78 D  
Non-Qualified Stock Option (right to buy)   (1) 12/02/2012 Common Stock 10,000 $ 21.1 D  
Non-Qualified Stock Option (right to buy) 05/18/2005 05/18/2011 Common Stock 108,574 $ 24.7979 D  
Non-Qualified Stock Option (right to buy)   (5) 06/11/2012 Common Stock 15,000 $ 24.935 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Lo Paul (Sheng-Chun)
700 EAST MIDDLEFIELD ROAD
MOUNTAIN VIEW, CA 94043		       Sr VP & GM, Analog/Mixed Signa  

Signatures

By: Stephen Buckhout pursuant to POA For: Paul (Sheng-Chun) Lo 09/14/2006
**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) 3/48 vested 3 months after grant date with the balance vesting in 45 equal monthly installments.
(2) Exercisable in 36 equal monthly installments beginning one month from grant date
(3) 3/48 vested 3 months after grant date with the balance vesting in 45 equal monthly installments. Original grant of 14,840 shares: 14,221 shares have been exercised prior to individual becoming a reporting person.
(4) 3/48 vested 3 months after grant date with the balance vesting in 45 equal monthly installments. Original grant of 12,000 shares: 4,000 shares have been exercised prior to individual becoming a reporting person.
(5) 3/48 vested 3 months after grant date with the balance vesting in 45 equal monthly installments. Original grant of 24,000 shares: 9,000 shares have been exercised prior to individual becoming a reporting person.

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