Definitive Additional Materials

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

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Exchange Act of 1934

(Amendment No.     )

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¨ Definitive Proxy Statement

 

x Definitive Additional Materials

 

¨ Soliciting Material Pursuant to §240.14a-12

SunPower Corporation

 

(Name of Registrant as Specified In Its Charter)

n/a

 

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*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to Be Held on November 15, 2011.

SUNPOWER CORPORATION

Meeting Information

Meeting Type: Special Meeting

For holders as of: September 19, 2011

Date: November 15, 2011 Time: 12:00 PM Local Time

Location: SunPower Corporation

77 Rio Robles

San Jose, California 95134

Meeting Directions: For directions to the Special Meeting please call: 408-240-5501

SUNPOWER CORPORATION

77 RIO ROBLES

SAN JOSE, CA 95134

You are receiving this communication because you hold shares in the above named company.

This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet or by mail upon request. You may view the proxy materials online at www.proxyvote.com or easily request a paper or e-mail copy (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.

See the reverse side of this notice to obtain

proxy materials and voting instructions.

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Before You Vote

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

NOTICE AND PROXY STATEMENT

How to View Online:

Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX (located on the following page) and visit: www.proxyvote.com.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

1) BY INTERNET: www.proxyvote.com

2) BY TELEPHONE: 1-800-579-1639

3) BY E-MAIL*: sendmaterial@proxyvote.com

* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow XXXX XXXX XXXX (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before November 1, 2011 to facilitate timely delivery.

How To Vote

Please Choose One of the Following Voting Methods

Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX available and follow the instructions.

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

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Voting Items

The Board of Directors recommends you vote FOR the following proposals:

1. Amend the Certificate of Incorporation to reclassify all outstanding shares of Class A common stock and Class B common stock into a single class of common stock and eliminate obsolete provisions of the Certificate of Incorporation.

2. Amend the Certificate of Incorporation to permit action by written consent of the stockholders without a meeting for any action required to be taken at any annual or special meeting.

3. Approval of the Third Amended and Restated SunPower Corporation 2005 Stock Incentive Plan that would increase the number of shares of common stock reserved for issuance under the plan by 2,500,000.

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