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Fair Value Measurement | 9 Months Ended
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Sep. 30, 2025
Fair Value Disclosures [Abstract] |
Fair Value Measurement | 8. Fair Value Measurement The fair value of the Company’s assets and liabilities, which qualify as financial instruments under ASC Topic 820, “Fair Value Measurements and Disclosures,” approximates the carrying amounts represented in the accompanying condensed balance sheets, primarily due to their short-term nature. GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used sin measuring fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The Company has determined that warrants issued in connection with the IPO are subject to treatment as a liability. The Company utilized a Monte Carlo simulation methodology to value the warrants for periods prior to public warrant trading and will use observable transactions for subsequent periods, with changes in fair value recognized in the condensed statements of operations. The estimated fair value of the warrant liability is determined using Level 1 and Level 2 inputs. The key assumptions in the option pricing model utilized are assumptions related to expected share-price volatility, expected term, risk-free interest rate and dividend yield. The expected volatility as of the IPO Closing Date was derived from observable public warrant pricing on comparable ‘blank-check’ companies that recently went public. Transfers to/from Levels 1, 2, and 3 are recognized at the beginning of the reporting period. The risk-free interest rate is based on the interpolated U.S. Constant Maturity Treasury yield. The expected term of the warrants is assumed to be six months until the close of a Business Combination, and the contractual five-year term subsequently. The dividend rate is based on the historical rate, which the Company anticipates remaining at zero. At September 30, 2025, there were observable transactions and adequate trading volume in the Company’s public warrants to provide a reliable indication of value. The Public Warrants were valued at $0.76 per warrant at September 30, 2025. The Warrants are measured at fair value on a recurring basis. The subsequent measurement of the Public Warrants as of September 30, 2025, is classified as Level 1 due to the use of both observable inputs in an active market as well as quoted prices in active markets for similar assets and liabilities. As of September 30, 2025, the aggregate value of the Public Warrants was approximately $6.8 million based on the closing price of GTENW on that date of $0.76 per warrant. As of May 5, 2025, the aggregate value of the Public Warrants was approximately $1.5 million. The following table presents the quantitative information regarding market assumptions used in the Level 3 valuation of the Public Warrants at initial recording:
|  | May 5, 2025
Implied Class A ordinary share price |  | $ | 9.96 |  |
Exercise price |  | $ | 11.5 |  |
Simulation term (years) |  |  | 2.8 |  |
Risk-free rate (continuous) |  |  | 3.76 |  | %
Selected volatility |  |  |  | 5.00 |  | %
The following table presents information about the Company’s assets and liabilities that are measured at fair value on a recurring basis as of September 30, 2025 and indicates the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value. In general, fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities. Fair values determined by Level 2 inputs utilize data points that are observable such as quoted prices, interest rates and yield curves. Fair values determined by Level 3 inputs are unobservable data points for the asset or liability, and includes situations where there is little, if any, market activity for the asset or liability:
|  | September 30 |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 2025 |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |
Investments held in Trust Account |  | $ |  | 364,813,852 |  |  | $ |  | 364,813,852 |  |  | $ |  | — |  |  | $ |  | — |
Public warrants |  | $ |  | 6,817,200 |  |  | $ |  | 6,817,200 |  |  | $ |  | — |  |  | $ |  | — |
|  | May 5 |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 2025 |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |
Investments held in Trust Account |  | $ |  | 358,800,000 |  |  | $ |  | 358,800,000 |  |  | $ |  | — |  |  | $ |  | — |
Public warrants |  | $ |  | 1,524,900 |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 1,524,900 |
Transfers to/from Levels 1, 2, and 3 are recognized at the end of the reporting period. On September 30, 2025, there were no movements in Levels.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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