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 *
CYPRESS SEMICONDUCTOR CORP /DE/
   2. Issuer Name and Ticker or Trading Symbol
SUNPOWER CORP [SPWR] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
198 CHAMPION COURT		 3. Date of Earliest Transaction (Month/Day/Year)
09/29/2008
(Street)

SAN JOSE, CA 95134		 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

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
Class B Common Stock (1) 09/29/2008   J(1)     42,033,287 11/10/2005 09/29/2008(1) Class A Common Stock 42,033,287 (2) (1) 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
CYPRESS SEMICONDUCTOR CORP /DE/
198 CHAMPION COURT
SAN JOSE, CA 95134		     X    

Signatures

 /s/ Brad W. Buss, Executive Vice President, Finance and Administration, Chief Financial Officer   10/01/2008
**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) On September 29, 2008, Cypress distributed all 42,033,287 shares of Class B Common Stock then owned by Cypress to Cypress' stockholders as a stock dividend (the "Spin Off"). Prior to the completion of the Spin Off, shares of Class B Common Stock were convertible into shares of Class A Common Stock on a one-for-one basis by Cypress at its option and under certain other circumstances. Following the completion of the Spin Off, the shares of Class B Common Stock are no longer convertible into shares of Class A Common Stock.
(2) As noted in footnote (1), shares of Class B Common Stock were convertible into shares of Class A Common Stock on a one-for-one basis prior to the completion of the Spin Off. Cypress has previously reported acquisitions and dispositions of shares of Class B Common Stock as acquisitions and dispositions of shares of Class A Common Stock, respectively, on ?Table I-Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned? of the relevant forms filed with the SEC pursuant to Section 16(a) of the Securities Exchange Act of 1934, as amended, and the relevant rules promulgated thereunder.

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