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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1. Name and Address of Reporting Person * DE GEUS AART   2. Issuer Name and Ticker or Trading Symbol SYNOPSYS INC [SNPS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman of the Board & CEO (Last) (First) (Middle) 700 EAST MIDDLEFIELD ROAD 3. Date of Earliest Transaction (Month/Day/Year) 12/02/2009 (Street) MOUNTAIN VIEW, CA 94043 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 12/04/2009   A   21,000 A $ 0 (1) 372,329 D   Common Stock 12/04/2009   A   19,950 A $ 0 (1) 392,279 D   Common Stock 12/04/2009   F   7,703 (2) D $ 21.02 384,576 D   Common Stock 12/04/2009   F   7,318 (2) D $ 21.02 377,258 D   Common Stock               22,000 I by Spouse (3) Common Stock               275,000 I by Trust (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Restricted Stock Units

$ 0

12/04/2009

D

21,000

12/04/2009

12/10/2011

Common Stock

21,000

$ 0

42,000

D

Restricted Stock Units

$ 0

12/02/2009

A(5)

79,800

12/04/2009(6)

12/08/2012

Common Stock

79,800

$ 0

79,800

D

Restricted Stock Units

$ 0

12/04/2009

D

19,950

12/04/2009

12/08/2012

Common Stock

19,950

$ 0

59,850

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DE GEUS AART 700 EAST MIDDLEFIELD ROAD MOUNTAIN VIEW, CA 94043	X		Chairman of the Board & CEO

Signatures

By: Stephen Buckhout pursuant to POA For: Aart de Geus		12/04/2009
**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)	Upon vesting, each restricted stock unit was converted into an equivalent number of shares of common stock.
(2)	These shares were retained by the Company in order to meet the tax withholding obligations of the award holder in connection with the vesting of an installment of the performance restricted stock unit award. The Compensation Committee approved the disposition of shares by the award holder and the amount retained by the Company was not in excess of the amount of the tax liability.
(3)	Reporting person disclaims beneficial ownership by spouse
(4)	On September 1, 2009, the reporting person established a new grantor retained annuity trust for the benefit of himself and his two minor children and contributed 275,000 shares of SNPS common stock thereto. On September 12, 2006, the reporting person contributed 275,000 shares of SNPS common stock to a grantor retained annuity trust for the benefit of himself and his two minor children (the "2006 GRAT"). The reporting person previously reported returns of an aggregate of [155,389] shares from the 2006 GRAT to himself. The 2006 GRAT terminated on September 12, 2009, at which time an aggregate of 14,852 shares were gifted to trusts for the benefit of the reporting person's minor children, each trust of which has an independent trustee. In addition, on September 12, 2009, the remaining [104,759] shares in the 2006 GRAT were returned to the reporting person.
(5)	On 12/10/08 the reporting person was granted Restricted Stock Units the vesting of which was based on satisfaction of certain performance criteria for the fiscal year ending 10/31/09. The performance criteria were met.
(6)	25% of the units vest on the date shown followed by three equal annual installments.

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