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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   ----------
                                    FORM 8-K
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                                 CURRENT REPORT
                         PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                                  JULY 20, 2006
                DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED)

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                              SUNPOWER CORPORATION
             (Exact name of Registrant as specified in its charter)

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           Delaware                     000-51593               94-3008969
 (State or other Jurisdiction     (Commission File No.)       (IRS Employer
      of Incorporation)                                    Identification No.)

                             3939 North First Street
                           San Jose, California 95134
          (Address of principal executive offices, including zip code)

                                 (408) 240-5500
              (Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ]  Written communications pursuant to Rule 425 under the Securities
     Act (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange
     Act (17 CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))

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ITEM 2.02 RESULTS OF OPERATIONS AND FINANCIAL CONDITION On July 20, 2006, SunPower Corporation. (the "Registrant") issued the press release attached hereto as Exhibit 99.1 announcing its results of operations for the second quarter of 2006. The information contained in this Form 8-K shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934 (the "Exchange Act") or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such filing. ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS (d) Exhibits. The following exhibit is furnished with this report on Form 8-K: 99.1 SunPower Corporation press release dated July 20, 2006. 2

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. SunPower Corporation. By: /s/ Emmanuel Hernandez ---------------------- Emmanuel Hernandez Chief Financial Officer Date: July 20, 2006 3

Exhibit Index EXHIBIT NUMBER DESCRIPTION - -------- --------------------------------------------------------------------- 99.1 Registrant's Press release dated July 20, 2006, is furnished pursuant to Item 2.02 of Form 8-K 4

                                                                    Exhibit 99.1

                  SUNPOWER REPORTS SECOND QUARTER 2006 RESULTS

     SAN JOSE, Calif., July 20 /PRNewswire-FirstCall/ -- SunPower Corporation
(Nasdaq: SPWR) today announced that revenue for the second quarter ended June
30, 2006 was $54.7 million, up 30% from the prior quarter's revenue of $42.0
million and up 233% from the second quarter 2005 revenue of $16.4 million.

     GAAP net income for the quarter was $5.4 million, or $0.08 diluted earnings
per share, compared to last quarter's net income of $0.3 million or $0.00 per
share and the second quarter 2005 net loss of $6.3 million.

     On a non-GAAP basis, excluding amortization of intangible assets,
stock-based compensation and the related tax effects, second quarter net income
was $7.5 million or $0.11 diluted earnings per share, compared to the prior
quarter's net income of $2.8 million and the second quarter 2005 net loss of
$5.0 million.

     Tom Werner, SunPower's CEO, said, "We had a strong quarter and our
operating results were significantly ahead of our announced objectives. Thanks
to our successful follow-on stock offering, we are well-positioned to accelerate
our growth while extending our technological advantages.

     "SunPower's manufacturing and R&D teams continue to execute, meeting or
beating our goals on all fronts," stated Werner. "The investment we made in the
first quarter to move to thinner wafers, improving our silicon utilization, paid
off in the second quarter. We are now producing cells at under eight grams of
polysilicon per watt, which contributed to the sequential quarterly improvement
in our non-GAAP gross margin from 17% in the first quarter of 2006 to 24% in the
second quarter."(1)

     OTHER SECOND QUARTER HIGHLIGHTS

     o    Successfully completed a $198 million follow-on stock offering: In
          June 2006, to support accelerated growth, SunPower sold 7 million
          shares of common stock at $29.50 per share before offering expenses.

     o    Executed four silicon agreements: Less than two months after the
          follow-on offering, SunPower executed three silicon supply agreements
          after previously concluding an extension of the M.Setek agreement.
          Consistent with SunPower's diversified silicon supply strategy, these
          agreements vary in terms of start date, duration, supplier and
          technology. These agreements include:

          a)   A supply agreement with DC Chemical Co. Ltd. SunPower will
               procure approximately $250 million of polysilicon from DC
               Chemical over a four-year term beginning in 2008. This agreement
               provides SunPower with polysilicon from DC Chemical's first
               polysilicon manufacturing facility. DC Chemical is Korea's
               largest chemical company and has expertise in producing gases
               which are key raw materials required for manufacturing
               polysilicon. To support the construction of this facility,
               SunPower will make prepayments to DC Chemical over the next 12
               months that will be credited against its purchase price upon
               polysilicon delivery.

          b)   A supply agreement with the world's leading manufacturer of
               polysilicon for semiconductor and solar grade silicon. SunPower
               will procure approximately $70 million of polysilicon from this
               polysilicon manufacturer over a ten-year term beginning in 2009.

          c)   An investment in a private company seeking to develop and
               commercialize an advanced technology process for polysilicon
               manufacturing.

          d)   An extension and expansion of a supply agreement with M.Setek Co.
               Ltd. SunPower's three new silicon agreements complement its
               M.Setek silicon supply agreement. In May 2006, the M.Setek
               agreement was amended and extended for two years through 2010 and
               expanded to a value estimated to exceed $500 million over its
               five-year term. M.Setek is a leading high-quality manufacturer of
               monocrystalline silicon ingots and wafers for the solar industry.

o Expanded capacity plans for second solar cell manufacturing plant: In the second quarter SunPower decided to buy land and an existing building to expand its cell manufacturing. The company had previously announced plans to construct a new cell manufacturing facility capable of housing six manufacturing lines. The newly purchased building has space for up to ten additional production lines, providing for a potential facility capacity of more than 300 megawatts, an increase of 100 megawatts from the previously announced planned capacity at SunPower's second cell plant. This building is located near SunPower's first cell manufacturing facility in the Philippines. SunPower plans to expand its nameplate manufacturing capacity, as illustrated in the table below, from 108 megawatts at year-end 2006 to at least 372 megawatts at year-end 2008. SunPower's expansion plans provide for nameplate capacity at the end of each year sufficient to achieve at least 80% - 90% of the production volume available in the subsequent year given current silicon supply agreements. SunPower intends to continue to secure additional sources of silicon supply. SunPower's Nameplate Capacity Plan Supports a Minimum of 80% to 90% of the Subsequent Year's Production Based on Silicon Supply 2006 2007 2008 -------- -------- -------- Expected Year-end Nameplate Capacity (megawatts) 108 207 372 -------- -------- -------- Production Capacity Supported by Current Silicon Procurement (megawatts) 65 110 250 -------- -------- -------- Cash Required for Silicon in Advance of Delivery ($ millions) $ 39.2* $ 48.3 $ 18.3 -------- -------- -------- * Third and fourth quarters 2006. o Met or exceeded all manufacturing milestones: In addition to meeting its goals for improving silicon utilization, SunPower is on track to begin production on Line 4 by the end of 2006, which will manufacture Gen 2 (second generation) solar cells with a 22% minimum-rated conversion efficiency. In addition, SunPower expects to begin production at its first solar panel plant in the third quarter 2006, also located in the Philippines. o Rapidly expanded SunPower's market penetration around the world: SunPower substantially diversified its geographic reach and its customer base in the first two quarters of 2006. The company is now active in major markets around the world, including 13 states in the U.S., Germany, Japan, Korea, Spain, Italy, and Portugal. SunPower has shipped over 1200 systems to North America in the last year. Because SunPower solar panels have the highest-rated power per square meter of any solar panel in the market today, residential, commercial and industrial customers, including power plants, are using SunPower's technology to maximize their solar power output.

"We expect that our success ramping up production on our first three lines will allow us to achieve sequential quarterly growth with revenues between $60 to $62 million in the third quarter of 2006, expected non-GAAP gross margins of 24% to 25% and diluted non-GAAP net income per of share of $0.13 to $0.15," Werner said.(2) "Our continued success in manufacturing expansion and technology advancement gives us the confidence to increase our 2006 revenue guidance to $225 to $230 million, up from our previous guidance of greater than $220 million, and provide 2007 revenue guidance of greater than $360 million." About SunPower SunPower Corp. (Nasdaq: SPWR) designs and manufactures high efficiency silicon solar cells and solar panels based on an all-back contact cell design. SunPower's solar cells and panels generate up to 50 percent more power per unit area than conventional solar technologies and have a uniquely attractive, all-black appearance. For more information on SunPower or solar technology, please visit the SunPower website at http://www.sunpowercorp.com. SunPower is a majority owned subsidiary of Cypress Semiconductor Corp. (NYSE: CY). Forward Looking Statements Statements herein that are not historical facts and that refer to SunPower's plans and expectations for revenue, gross margin and income for the third quarter and the full year of 2006 and the full year of 2007, the expected value of and expenditures under its supply contracts, the future construction and operation of its manufacturing facilities and the future supply of polysilicon and ingots, are forward-looking statements made pursuant to the Private Securities Litigation Reform Act of 1995. Such statements are based on our current expectations as of the date of the release, which could change or not materialize as expected. Our actual results may differ materially due to a variety of uncertainties and risk factors, including but not limited to business and economic conditions and growth trends in the solar power industry, our ability to obtain adequate supply of polysilicon and silicon ingots to manufacture our products and the price we pay for such material, our ability to ramp new production lines, our ability to realize expected manufacturing efficiencies, production difficulties that could arise and other risks described in our Annual Report on Form 10-K and other filings with the Securities and Exchange Commission. Except as required by law, we assume no obligation to update any such forward-looking statements. We use words such as "believes," "plans" and "expects" and similar expressions to identify forward-looking statements that include, but are not limited to, statements related to future demand for our products, our silicon supply, our expected revenue growth, our production capabilities, the value of and expenditures under our supply contracts, our gross margin, our earnings per share and our production capacity expansion plans. To supplement the consolidated financial results prepared under GAAP, SunPower uses non-GAAP measures which are adjusted from the most directly comparable GAAP results to exclude items related to amortization of intangible assets, stock-based compensation and the related tax effects. Management does not consider these charges in evaluating the core operational activities of the Company. Management uses these non-GAAP measures internally to make strategic decisions, forecast future results and evaluate the Company's current performance. Most analysts covering SunPower use the non-GAAP measures as well. Given management's use of these non-GAAP measures, SunPower believes these measures are important to investors in understanding the Company's current and future operating results as seen through the eyes of management. In addition, management believes these non-GAAP measures are useful to investors in enabling them to better assess changes in SunPower's core business across different time periods. These non-GAAP measures are not in accordance with or an alternative for GAAP financial data and may be different from non-GAAP measures used by other companies. Fiscal Periods The company operates on a fiscal calendar comprised of four thirteen-week quarters that end at midnight Pacific Time on the Sunday nearest the calendar quarter-end. For simplicity, the company labels its fiscal quarters as ending on the calendar quarter date.

NOTE: SunPower is a registered trademark of SunPower Corp. Cypress is a registered trademark of Cypress Semiconductor Corp. All other trademarks are the property of their respective owners. (1) The equivalent GAAP gross margin in the first quarter 2006 was 14% and the second quarter 2006 equivalent GAAP gross margin was 21%. (2) The estimated GAAP gross margin for Q306 is 21-22%. The estimated GAAP net income per share in Q306 is $0.08-$0.10. SUNPOWER CORPORATION CONDENSED CONSOLIDATED BALANCE SHEETS (In thousands) (Unaudited) June 30, December 31, 2006 2005 ---------- ------------ ASSETS Cash and cash equivalents $ 277,493 $ 143,592 Short-term investments 19,900 -- Accounts receivable, net 34,263 25,498 Inventories 21,566 13,147 Prepaid expenses and other assets 33,319 3,236 Property and equipment, net 136,435 110,559 Goodwill and other intangible assets, net 19,271 21,622 Total assets $ 542,247 $ 317,654 LIABILITIES AND STOCKHOLDERS' EQUITY Accounts payable and accrued liabilities $ 36,313 $ 21,604 Customer advances 42,113 37,400 Total liabilities 78,426 59,004 Stockholders' equity 463,821 258,650 Total liabilities and stockholders' equity $ 542,247 $ 317,654

SUNPOWER CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (On a GAAP basis) (In thousands, except per share data) (Unaudited) THREE MONTHS ENDED SIX MONTHS ENDED ----------------------------------- ---------------------- June 30, March 31, June 30, June 30, June 30, 2006 2006 2005 2006 2005 --------- --------- --------- --------- --------- Revenue $ 54,695 $ 41,958 $ 16,400 $ 96,653 $ 27,492 Cost of revenue 43,248 36,266 17,585 79,514 30,678 Gross margin 11,447 5,692 (1,185) 17,139 (3,186) Operating expenses: Research and development 2,588 1,996 1,360 4,584 3,027 Selling, general and administrative 4,985 4,381 2,203 9,366 4,003 Total operating expenses 7,573 6,377 3,563 13,950 7,030 Operating income (loss) 3,874 (685) (4,748) 3,189 (10,216) Interest and other income (expense), net 1,922 971 (1,588) 2,893 (3,357) Income (loss) before income tax provision 5,796 286 (6,336) 6,082 (13,573) Income tax provision 412 31 -- 443 -- Net income (loss) $ 5,384 $ 255 $ (6,336) $ 5,639 $ (13,573) Net income per share: - Basic $ 0.08 $ 0.00 $ 0.09 - Diluted $ 0.08 $ 0.00 $ 0.08 Shares used in calculation of net income per share: - Basic 64,040 61,126 62,583 - Diluted 69,357 66,932 68,172 Reconciliation of net income (loss) to non-GAAP net income (loss): Net income (loss) $ 5,384 $ 255 $ (6,336) $ 5,639 $ (13,573) Reconciling items: Stock-based compensation expenses 1,137 1,412 184 2,549 184 Amortization of intangible assets 1,175 1,175 1,177 2,350 2,353 Tax Impact (162) -- -- (162) -- Non-GAAP net income (loss) $ 7,534 $ 2,842 $ (4,975) $ 10,376 $ (11,036) Non-GAAP net income per share: - Basic $ 0.12 $ 0.05 $ 0.17 - Diluted $ 0.11 $ 0.04 $ 0.15 Shares used in calculation of non-GAAP net income per share: - Basic 64,040 61,126 62,583 - Diluted 69,357 66,932 68,172

SUNPOWER CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (On a non-GAAP basis) (In thousands, except per share data) (Unaudited) THREE MONTHS ENDED SIX MONTHS ENDED ----------------------------------- ---------------------- June 30, March 31, June 30, June 30, June 30, 2006 2006 2005 2006 2005 --------- --------- --------- --------- --------- Revenue $ 54,695 $ 41,958 $ 16,400 $ 96,653 $ 27,492 Cost of revenue 41,839 34,897 16,316 76,736 28,233 Gross margin 12,856 7,061 84 19,917 (741) Operating expenses: Research and development 2,324 1,577 1,291 3,901 2,958 Selling, general and administrative 4,346 3,582 2,180 7,928 3,980 Total operating expenses 6,670 5,159 3,471 11,829 6,938 Operating income (loss) 6,186 1,902 (3,387) 8,088 (7,679) Interest and other income (expense), net 1,922 971 (1,588) 2,893 (3,357) Income (loss) before income tax provision 8,108 2,873 (4,975) 10,981 (11,036) Income tax provision 574 31 -- 605 -- Net income (loss) $ 7,534 $ 2,842 $ (4,975) $ 10,376 $ (11,036) Non-GAAP net income per share: - Basic $ 0.12 $ 0.05 $ 0.17 - Diluted $ 0.11 $ 0.04 $ 0.15 Shares used in calculation of non-GAAP net income per share: - Basic 64,040 61,126 62,583 - Diluted 69,357 66,932 68,172 See accompanying reconciliation of GAAP measures to non-GAAP measures.

SUNPOWER CORPORATION RECONCILIATIONS OF GAAP MEASURES TO NON-GAAP MEASURES (Unaudited) (In thousands, except per share data) NET INCOME PER SHARE: SIX MONTHS THREE MONTHS ENDED ENDED --------------------- --------- June 30, March 31, June 30, 2006 2006 2006 --------- --------- --------- Basic: GAAP net income per share $ 0.08 $ 0.00 $ 0.09 Reconciling items: Amortization of intangible assets 0.02 0.02 0.04 Stock-based compensation expense 0.02 0.03 0.04 Non-GAAP net income per share $ 0.12 $ 0.05 $ 0.17 Diluted: GAAP net income per share $ 0.08 $ 0.00 $ 0.08 Reconciling items: Amortization of intangible assets 0.02 0.02 0.04 Stock-based compensation expense 0.01 0.02 0.03 Non-GAAP net income per share $ 0.11 $ 0.04 $ 0.15 STATEMENT OF OPERATIONS DATA: THREE MONTHS ENDED SIX MONTHS ENDED ----------------------------------- ---------------------- June 30, March 31, June 30, June 30, June 30, 2006 2006 2005 2006 2005 --------- --------- --------- --------- --------- GAAP cost of revenue $ 43,248 $ 36,266 $ 17,585 $ 79,514 $ 30,678 Amortization of intangible assets (1,175) (1,175) (1,177) (2,350) (2,353) Stock-based compensation (234) (194) (92) (428) (92) Non-GAAP cost of revenue $ 41,839 $ 34,897 $ 16,316 $ 76,736 $ 28,233 GAAP research and development expense $ 2,588 $ 1,996 $ 1,360 $ 4,584 $ 3,027 Stock-based compensation (264) (419) (69) (683) (69) Non-GAAP research and development expense $ 2,324 $ 1,577 $ 1,291 $ 3,901 $ 2,958 GAAP selling, general and administrative expense $ 4,985 $ 4,381 $ 2,203 $ 9,366 $ 4,003 Stock-based compensation (639) (799) (23) (1,438) (23) Non-GAAP selling, general and administrative expense $ 4,346 $ 3,582 $ 2,180 $ 7,928 $ 3,980 GAAP operating income (loss) $ 3,874 $ (685) $ (4,748) $ 3,189 $ (10,216) Amortization of intangible assets 1,175 1,175 1,177 2,350 2,353 Stock-based compensation 1,137 1,412 184 2,549 184 Non-GAAP operating income (loss) $ 6,186 $ 1,902 $ (3,387) $ 8,088 $ (7,679) GAAP income (loss) before income tax provision $ 5,796 $ 286 $ (6,336) $ 6,082 $ (13,573) Amortization of intangible assets 1,175 1,175 1,177 2,350 2,353 Stock-based compensation 1,137 1,412 184 2,549 184 Non-GAAP income (loss) before income tax provision $ 8,108 $ 2,873 $ (4,975) $ 10,981 $ (11,036) GAAP net income (loss) $ 5,384 $ 255 $ (6,336) $ 5,639 $ (13,573) Amortization of intangible assets 1,175 1,175 1,177 2,350 2,353 Stock-based compensation 1,137 1,412 184 2,549 184 Tax effect (162) -- -- (162) -- Non-GAAP income (loss) $ 7,534 $ 2,842 $ (4,975) $ 10,376 $ (11,036) SOURCE SunPower Corporation -0- 07/20/2006 /CONTACT: Julie Blunden, +1-408-240-5577, or Manny Hernandez, +1-408-240-5574, both of SunPower Corporation/ /Web site: http://www.sunpowercorp.com/ (SPWR CY)