FAIR VALUE MEASUREMENTS (Tables)
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9 Months Ended |
Sep. 30, 2026 |
| Fair Value Disclosures [Abstract] |
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| Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis |
The following table presents assets and liabilities measured at fair value on a recurring basis using the above input categories: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2026 | | December 31, 2025 | | | | | | | | | | | | | | (In thousands) | | Level 1 | | Level 2 | | Level 3 | | Level 1 | | Level 2 | | Level 3 | | Assets: | | | | | | | | | | | | | Cash equivalents: | | | | | | | | | | | | | Money market funds | $ | 44,150 | | | $ | — | | | $ | — | | | $ | 186,677 | | | $ | — | | | $ | — | | | | | | | | | | | | | | | Commercial paper | — | | | — | | | — | | | — | | | 14,985 | | | — | | | U.S. Treasuries | — | | | 19,970 | | | — | | | — | | | 29,885 | | | — | | | U.S. Government agency securities | — | | | 6,000 | | | — | | | — | | | — | | | — | | | Marketable securities: | | | | | | | | | | | | | Certificates of deposit | — | | | — | | | — | | | — | | | 14,515 | | | — | | | Commercial paper | — | | | 13,405 | | | — | | | — | | | 12,908 | | | — | | | Corporate notes and bonds | — | | | 239,480 | | | — | | | — | | | 373,383 | | | — | | | U.S. Treasuries | — | | | 64,147 | | | — | | | — | | | 63,754 | | | — | | | U.S. Government agency securities | — | | | 234,149 | | | — | | | — | | | 573,976 | | | — | | | Equity securities - SunPower common stock | 267 | | | — | | | — | | | — | | | — | | | — | | | Other current assets: | | | | | | | | | | | | | Investments in debt securities | — | | | — | | | 24,408 | | | — | | | — | | | — | | | Other assets: | | | | | | | | | | | | | Investments in debt securities | — | | | 2,319 | | | 29,746 | | | — | | | 6,300 | | | 55,046 | | | Investment in equity instruments | — | | | — | | | 5,000 | | | — | | | — | | | 5,000 | | | Investment in tax equity fund | — | | | — | | | 380 | | | — | | | — | | | 754 | | | Total assets measured at fair value | $ | 44,417 | | | $ | 579,470 | | | $ | 59,534 | | | $ | 186,677 | | | $ | 1,089,706 | | | $ | 60,800 | | | | | | | | | | | | | | | Liabilities: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Warranty obligations: | | | | | | | | | | | | | Current | $ | — | | | $ | — | | | $ | 22,771 | | | $ | — | | | $ | — | | | $ | 23,259 | | | Non-current | — | | | — | | | 164,191 | | | — | | | — | | | 169,963 | | | Total warranty obligations measured at fair value | — | | | — | | | 186,962 | | | — | | | — | | | 193,222 | | | Total liabilities measured at fair value | $ | — | | | $ | — | | | $ | 186,962 | | | $ | — | | | $ | — | | | $ | 193,222 | |
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| Schedule of Carrying Amount and Fair Value |
As of September 30, 2026, the carrying amount and fair value of the Notes due 2028 was as follows: | | | | | | | | | | | | | Carrying Amount | | Fair Value | | | | | | (In thousands) | | Notes due 2028 | $ | 573,163 | | | $ | 530,438 | |
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| Schedule of Significant Unobservable Inputs used in the Fair Value Measurement of Assets Designated as Level 3 |
The changes in the balance of investments in debt securities were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | | | 2026 | | 2025 | | 2026 | | 2025 | | | | | | | | | | | | | | (In thousands) | | Balance at beginning of period | $ | 87,948 | | | $ | 55,693 | | | $ | 61,346 | | | $ | 64,834 | | | | | Secured revolving credit facility, net | (4,944) | | | 6,300 | | | 24,408 | | | 6,300 | | | | | Fair value reduction included in other expense, net | (26,531) | | | (3,174) | | | (29,281) | | | (12,315) | | | | | | | | | | | | | | | Balance at end of period | $ | 56,473 | | | $ | 58,819 | | | $ | 56,473 | | | $ | 58,819 | | | |
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| Schedule of Principal Outstanding of Loan Receivables |
The principal outstanding under the loan receivables were as follows: | | | | | | | | | September 30, 2026 | | | | (In thousands) | | Current | $ | 34,113 | | | | | Non-current | 1,500 | | | | | Loan receivables | $ | 35,613 | | | |
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| Schedule of Variable Interest Entities |
The following table presents the carrying amounts of the Company’s variable interests and its maximum exposure to loss as of September 30, 2026: | | | | | | | | | | | | | | | | | | | | | | | | Arrangement | | Balance Sheet Classification | | Carrying Amount (Fair Value) | | Maximum Exposure | | | | | | | (In thousands) | Non-controlling equity investment (19.99%) | | Other assets | | $ | 5,000 | | | $ | 5,000 | | | | $1.5 million secured loan receivable — Loan 1 | | Other assets | | $ | 1,777 | | | $ | 1,777 | | | | $1.0 million secured loan receivable — Loan 2 | | Prepaid expenses and other current assets | | $ | 1,082 | | | $ | 1,082 | | | | $30.0 million secured revolving credit facility (approximately $24.4 million drawn) | | Prepaid expenses and other current assets | | $ | 24,408 | | | $ | 30,000 | | | | $35.0 million letters of credit (drawn: None) | | Accrued and other liabilities | | — | | | $ | 35,000 | | | |
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| Schedule of Changes in Nonfinancial Liabilities Related to Warrant Obligations Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs |
The following table provides information regarding changes in non-financial liabilities related to the Company’s warranty obligations measured at fair value on a recurring basis using significant unobservable inputs designated as Level 3 for the periods indicated: | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2026 | | 2025 | | 2026 | | 2025 | | | | | | | | | | | | | | (In thousands) | | Balance at beginning of period | $ | 185,447 | | | $ | 182,179 | | | $ | 193,222 | | | $ | 170,916 | | | | | Accruals for warranties issued during period | 6,970 | | | 7,918 | | | 18,238 | | | 22,814 | | | | | Changes in estimates | (2,074) | | | 554 | | | (9,037) | | | 8,430 | | | | | Settlements | (4,920) | | | (4,965) | | | (12,843) | | | (14,783) | | | | | Increase due to accretion expense | 3,491 | | | 3,498 | | | 10,373 | | | 9,804 | | | | | Change in profit element and risk premium | — | | | — | | | (3,526) | | | 781 | | | | | Change in discount rate | — | | | — | | | (3,332) | | | (5,715) | | | | | Other | (1,952) | | | (2,105) | | | (6,133) | | | (5,168) | | | | | Balance at end of period | $ | 186,962 | | | $ | 187,079 | | | $ | 186,962 | | | $ | 187,079 | | | |
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| Schedule of Significant Unobservable Inputs used in the Fair Value Measurement of Liabilities Designated as Level 3 |
As of September 30, 2026 and December 31, 2025, the significant unobservable inputs used in the fair value measurement of the Company’s liabilities designated as Level 3 were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Percent Used (Weighted Average) | | Item Measured at Fair Value | | Valuation Technique | | Description of Significant Unobservable Input | | September 30, 2026 | | December 31, 2025 | | Warranty obligations for products sold since January 1, 2014 | | Discounted cash flows | | Profit element and risk premium | | 14.9% | | 17.5% | | | Credit-adjusted risk-free rate | | 7.5% | | 7.3% | | | | | | | | | | | | | | | | | | |
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