Organization and Business Operations	3 Months Ended
Mar. 31, 2026
Organization and Business Operations [Abstract]
ORGANIZATION AND BUSINESS OPERATIONS	Note 1 — Organization and Business Operations SC II Acquisition Corp. (the “Company”) is a blank check company incorporated as a Cayman Islands exempted corporation on June 30, 2025. The Company was incorporated for the purpose of effecting a merger, amalgamation, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses (the “Business Combination”). The Company is an early-stage and emerging growth company and, as such, the Company is subject to all of the risks associated with early-stage and emerging growth companies. The Company may pursue an initial Business Combination target in any industry. As of March 31, 2026, the Company had not entered into a definitive agreement with a specific Business Combination target. As of March 31, 2026, the Company had not commenced any operations. All activity for the period from June 30, 2025 (inception) through March 31, 2026 relates to the Company’s formation, the Initial Public Offering (as defined below), and subsequent to the Initial Public Offering, identifying and evaluating prospective acquisition candidates and activities in connection with the Business Combination. The Company will not generate any operating revenues until after the completion of its initial Business Combination, at the earliest. The Company generates non-operating income in the form of interest income from the proceeds derived from the Initial Public Offering. The Company has selected December 31 as its fiscal year end. The Registration Statement on Form S-1 for the Initial Public Offering, initially filed with the U.S. Securities and Exchange Commission (the “SEC”) on October 16, 2025, as amended (File No. 333-290917) was declared effective on November 25, 2025 (the “IPO Registration Statement”). On November 28, 2025, the Company consummated the Initial Public Offering of 17,250,000 units (the “Public Units”) at $10.00 per Public Unit, which included the full exercise of the Over-Allotment Option (as defined in Note 6) of 2,250,000 units (the “Option Units”), generating gross proceeds of $172,500,000 (the “Initial Public Offering”), as discussed in Note 3. Each Public Unit consists of one Class A Ordinary Share, par value $0.0001 per share, of the Company (the “Class A Ordinary Shares” and with respect to the Class A Ordinary Shares included in the Public Units, the “Public Shares”) and one right to receive one fifth (1/5) of a Class A Ordinary Share upon the consummation of an initial Business Combination (the “Public Rights”). Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of an aggregate of 255,000 units (the “Private Placement Units” and together with the Public Units, the “Units”), to (i) the Company’s sponsor, SC Capital II Sponsor LLC (the “Sponsor”), in the Initial Public Offering at a price of $10.00 per Private Placement Unit, or $2,550,000 in the aggregate (the “Private Placement”), as discussed in Note 4. Each Private Placement Unit consists of one Class A Ordinary Share (the “Private Placement Shares”) and one right to receive one-fifth of one Class A Ordinary Share upon consummation of a Business Combination (the “Private Placement Rights”, and together with the Public Rights, the “Rights”). Transaction costs amounted to $1,280,564, consisting of $750,000 of cash underwriting fee (net of $2,700,000 underwriters’ reimbursement), and $530,564 of other offering costs. The Business Combination must be with one or more target businesses that together have a fair market value equal to at least 80% of the net balance in the Trust Account (as defined below) (excluding the amount of Deferred Fee (as defined below), if any, and taxes payable on the income earned on the Trust Account, if any) at the time of the signing an agreement to enter into a Business Combination. However, the Company will only complete a Business Combination if the post-Business Combination company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”). There is no assurance that the Company will be able to successfully effect a Business Combination. Following the closing of the Initial Public Offering, on November 28, 2025, an amount of $172,500,000 ($10.00 per Public Unit) from the net proceeds of the Initial Public Offering and the Private Placement was placed in the trust account (the “Trust Account”), located in the United States, and may only be invested in U.S. government treasury obligations with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act, which invest only in direct U.S. government treasury obligations; the holding of these assets in this form is intended to be temporary and for the sole purpose of facilitating the intended Business Combination. To mitigate the risk that the Company might be deemed to be an investment company for purposes of the Investment Company Act, which risk increases the longer that the Company holds investments in the Trust Account, the Company may, at any time (based on management team’s ongoing assessment of all factors related to the potential status under the Investment Company Act), instruct the trustee to liquidate the investments held in the Trust Account and instead to hold the funds in the Trust Account in cash or in an interest bearing demand deposit account at a bank. Except for the withdrawal of interest to pay taxes, other than excise taxes, if any, and up to $100,000 to pay dissolution expenses, as applicable, if any, the proceeds from the Initial Public Offering and the portion of the proceeds from the Private Placement deposited into the Trust Account will not be released from the Trust Account until the earliest of (i) the completion of the initial Business Combination, (ii) the redemption of the Public Shares if the Company is unable to complete the initial Business Combination by May 28, 2027, which the Company may, at the Sponsor’s option, extend two times, each by an additional three (3) months, without shareholder approval, for a total of 24 months from the closing of the Initial Public Offering), or by such earlier liquidation date as the Company’s board of directors (the “Board”) may approve (the “Combination Period”), subject to applicable law, or (iii) the redemption of the Public Shares properly submitted in connection with a shareholder vote to amend the Company’s amended and restated memorandum and articles of association (the “Amended and Restated Articles”) to modify (1) the substance or timing of the Company’s obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the Public Shares if the Company has not consummated an initial Business Combination within the Combination Period or (2) any other material provisions relating to shareholders’ rights or pre-initial Business Combination activity. The proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the holders of the Public Shares (the “Public Shareholders”). The Company will provide the Public Shareholders with the opportunity to redeem all or a portion of their Public Shares upon the completion of the initial Business Combination either (i) in connection with a general meeting called to approve the initial Business Combination or (ii) without a shareholder vote by means of a tender offer. The decision as to whether the Company will seek shareholder approval of a proposed initial Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The Public Shareholders will be entitled to redeem their Public Shares at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to the consummation of the initial Business Combination, including interest earned on the funds held in the Trust Account (less taxes, if any, payable and up to $100,000 of interest income to pay dissolution expenses), divided by the number of then outstanding Public Shares, subject to the limitations. The amount in the Trust Account invested was $10.12 per Public Share as of March 31, 2026. The Class A Ordinary Shares subject to redemption were recorded at a redemption value and classified as temporary equity upon the completion of the Initial Public Offering, in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 480 “Distinguishing Liabilities from Equity.” The Company has only the duration of the Combination Period to complete the initial Business Combination. However, if the Company is unable to complete its initial Business Combination within the Combination Period, the Company will as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account (less taxes payable, if any, and up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Public Shares, which redemption will constitute full and complete payment for the Public Shares and completely extinguish Public Shareholders’ rights as shareholders (including the right to receive further liquidation or other distributions, if any), subject to the Company’s obligations under Cayman Islands law to provide for claims of creditors and subject to the other requirements of applicable law. The Sponsor and the Company’s officers and directors have entered into a letter agreement with the Company, dated November 25, 2025, pursuant to which they have agreed to (i) waive their redemption rights with respect to their Founder Shares (as defined in Note 5), Private Placement Shares and Public Shares in connection with (x) the completion of the initial Business Combination or an earlier redemption in connection with the commencement of the procedures to consummate the initial Business Combination if the Company determines it is desirable to facilitate the completion of the initial Business Combination and (y) a shareholder vote to approve an amendment to the Amended and Restated Articles to modify (1) the substance or timing of the Company’s obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the Public Shares if the Company has not consummated an initial Business Combination within the Combination Period or (2) any other material provisions relating to shareholders’ rights or pre-initial Business Combination activity; (ii) waive their rights to liquidating distributions from the Trust Account with respect to their Founder Shares and Private Placement Shares if the Company fails to complete the initial Business Combination within the Combination Period, although they will be entitled to liquidating distributions from the Trust Account with respect to any Public Shares they hold if the Company fails to complete the initial Business Combination within the Combination Period and to liquidating distributions from assets outside the Trust Account; and (iii) vote any Founder Shares and Private Placement Shares held by them and any Public Shares purchased during or after the Initial Public Offering (including in open market and privately-negotiated transactions) in favor of the initial Business Combination. The Sponsor has agreed that it will be liable to the Company if and to the extent any claims by a third-party for services rendered or products sold to the Company, or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or other similar agreement or Business Combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10.00 per Public Share and (ii) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per Public Share due to reductions in the value of the Trust Account assets, less taxes payable, if any, and up to $100,000 of dissolution expenses, provided that such liability will not apply to any claims by a third-party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) nor will it apply to any claims under the Company’s indemnity of the several underwriters of the Initial Public Offering (the “Underwriters”) against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). However, the Company has not asked the Sponsor to reserve for such indemnification obligations, nor has the Company independently verified whether the Sponsor has sufficient funds to satisfy its indemnity obligations and the Company believes that the Sponsor’s only assets are securities of the Company. Therefore, the Company cannot assure that the Sponsor will be able to satisfy those obligations.

Organization and Business Operations

3 Months Ended

Mar. 31, 2026

Organization and Business Operations [Abstract]

Note 1 — Organization and Business Operations

SC II Acquisition Corp. (the “Company”) is a blank check company incorporated as a Cayman Islands exempted corporation on June 30, 2025. The Company was incorporated for the purpose of effecting a merger, amalgamation, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses (the “Business Combination”). The Company is an early-stage and emerging growth company and, as such, the Company is subject to all of the risks associated with early-stage and emerging growth companies. The Company may pursue an initial Business Combination target in any industry. As of March 31, 2026, the Company had not entered into a definitive agreement with a specific Business Combination target.

As of March 31, 2026, the Company had not commenced any operations. All activity for the period from June 30, 2025 (inception) through March 31, 2026 relates to the Company’s formation, the Initial Public Offering (as defined below), and subsequent to the Initial Public Offering, identifying and evaluating prospective acquisition candidates and activities in connection with the Business Combination. The Company will not generate any operating revenues until after the completion of its initial Business Combination, at the earliest. The Company generates non-operating income in the form of interest income from the proceeds derived from the Initial Public Offering. The Company has selected December 31 as its fiscal year end.

The Registration Statement on Form S-1 for the Initial Public Offering, initially filed with the U.S. Securities and Exchange Commission (the “SEC”) on October 16, 2025, as amended (File No. 333-290917) was declared effective on November 25, 2025 (the “IPO Registration Statement”). On November 28, 2025, the Company consummated the Initial Public Offering of 17,250,000 units (the “Public Units”) at $10.00 per Public Unit, which included the full exercise of the Over-Allotment Option (as defined in Note 6) of 2,250,000 units (the “Option Units”), generating gross proceeds of $172,500,000 (the “Initial Public Offering”), as discussed in Note 3. Each Public Unit consists of one Class A Ordinary Share, par value $0.0001 per share, of the Company (the “Class A Ordinary Shares” and with respect to the Class A Ordinary Shares included in the Public Units, the “Public Shares”) and one right to receive one fifth (1/5) of a Class A Ordinary Share upon the consummation of an initial Business Combination (the “Public Rights”).

Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of an aggregate of 255,000 units (the “Private Placement Units” and together with the Public Units, the “Units”), to (i) the Company’s sponsor, SC Capital II Sponsor LLC (the “Sponsor”), in the Initial Public Offering at a price of $10.00 per Private Placement Unit, or $2,550,000 in the aggregate (the “Private Placement”), as discussed in Note 4. Each Private Placement Unit consists of one Class A Ordinary Share (the “Private Placement Shares”) and one right to receive one-fifth of one Class A Ordinary Share upon consummation of a Business Combination (the “Private Placement Rights”, and together with the Public Rights, the “Rights”).

Transaction costs amounted to $1,280,564, consisting of $750,000 of cash underwriting fee (net of $2,700,000 underwriters’ reimbursement), and $530,564 of other offering costs.

The Business Combination must be with one or more target businesses that together have a fair market value equal to at least 80% of the net balance in the Trust Account (as defined below) (excluding the amount of Deferred Fee (as defined below), if any, and taxes payable on the income earned on the Trust Account, if any) at the time of the signing an agreement to enter into a Business Combination. However, the Company will only complete a Business Combination if the post-Business Combination company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”). There is no assurance that the Company will be able to successfully effect a Business Combination.

Following the closing of the Initial Public Offering, on November 28, 2025, an amount of $172,500,000 ($10.00 per Public Unit) from the net proceeds of the Initial Public Offering and the Private Placement was placed in the trust account (the “Trust Account”), located in the United States, and may only be invested in U.S. government treasury obligations with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act, which invest only in direct U.S. government treasury obligations; the holding of these assets in this form is intended to be temporary and for the sole purpose of facilitating the intended Business Combination. To mitigate the risk that the Company might be deemed to be an investment company for purposes of the Investment Company Act, which risk increases the longer that the Company holds investments in the Trust Account, the Company may, at any time (based on management team’s ongoing assessment of all factors related to the potential status under the Investment Company Act), instruct the trustee to liquidate the investments held in the Trust Account and instead to hold the funds in the Trust Account in cash or in an interest bearing demand deposit account at a bank. Except for the withdrawal of interest to pay taxes, other than excise taxes, if any, and up to $100,000 to pay dissolution expenses, as applicable, if any, the proceeds from the Initial Public Offering and the portion of the proceeds from the Private Placement deposited into the Trust Account will not be released from the Trust Account until the earliest of (i) the completion of the initial Business Combination, (ii) the redemption of the Public Shares if the Company is unable to complete the initial Business Combination by May 28, 2027, which the Company may, at the Sponsor’s option, extend two times, each by an additional three (3) months, without shareholder approval, for a total of 24 months from the closing of the Initial Public Offering), or by such earlier liquidation date as the Company’s board of directors (the “Board”) may approve (the “Combination Period”), subject to applicable law, or (iii) the redemption of the Public Shares properly submitted in connection with a shareholder vote to amend the Company’s amended and restated memorandum and articles of association (the “Amended and Restated Articles”) to modify (1) the substance or timing of the Company’s obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the Public Shares if the Company has not consummated an initial Business Combination within the Combination Period or (2) any other material provisions relating to shareholders’ rights or pre-initial Business Combination activity. The proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the holders of the Public Shares (the “Public Shareholders”).

The Company will provide the Public Shareholders with the opportunity to redeem all or a portion of their Public Shares upon the completion of the initial Business Combination either (i) in connection with a general meeting called to approve the initial Business Combination or (ii) without a shareholder vote by means of a tender offer. The decision as to whether the Company will seek shareholder approval of a proposed initial Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The Public Shareholders will be entitled to redeem their Public Shares at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to the consummation of the initial Business Combination, including interest earned on the funds held in the Trust Account (less taxes, if any, payable and up to $100,000 of interest income to pay dissolution expenses), divided by the number of then outstanding Public Shares, subject to the limitations. The amount in the Trust Account invested was $10.12 per Public Share as of March 31, 2026.

The Class A Ordinary Shares subject to redemption were recorded at a redemption value and classified as temporary equity upon the completion of the Initial Public Offering, in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 480 “Distinguishing Liabilities from Equity.”

The Company has only the duration of the Combination Period to complete the initial Business Combination. However, if the Company is unable to complete its initial Business Combination within the Combination Period, the Company will as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account (less taxes payable, if any, and up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Public Shares, which redemption will constitute full and complete payment for the Public Shares and completely extinguish Public Shareholders’ rights as shareholders (including the right to receive further liquidation or other distributions, if any), subject to the Company’s obligations under Cayman Islands law to provide for claims of creditors and subject to the other requirements of applicable law.

The Sponsor and the Company’s officers and directors have entered into a letter agreement with the Company, dated November 25, 2025, pursuant to which they have agreed to (i) waive their redemption rights with respect to their Founder Shares (as defined in Note 5), Private Placement Shares and Public Shares in connection with (x) the completion of the initial Business Combination or an earlier redemption in connection with the commencement of the procedures to consummate the initial Business Combination if the Company determines it is desirable to facilitate the completion of the initial Business Combination and (y) a shareholder vote to approve an amendment to the Amended and Restated Articles to modify (1) the substance or timing of the Company’s obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the Public Shares if the Company has not consummated an initial Business Combination within the Combination Period or (2) any other material provisions relating to shareholders’ rights or pre-initial Business Combination activity; (ii) waive their rights to liquidating distributions from the Trust Account with respect to their Founder Shares and Private Placement Shares if the Company fails to complete the initial Business Combination within the Combination Period, although they will be entitled to liquidating distributions from the Trust Account with respect to any Public Shares they hold if the Company fails to complete the initial Business Combination within the Combination Period and to liquidating distributions from assets outside the Trust Account; and (iii) vote any Founder Shares and Private Placement Shares held by them and any Public Shares purchased during or after the Initial Public Offering (including in open market and privately-negotiated transactions) in favor of the initial Business Combination.

The Sponsor has agreed that it will be liable to the Company if and to the extent any claims by a third-party for services rendered or products sold to the Company, or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or other similar agreement or Business Combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10.00 per Public Share and (ii) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per Public Share due to reductions in the value of the Trust Account assets, less taxes payable, if any, and up to $100,000 of dissolution expenses, provided that such liability will not apply to any claims by a third-party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) nor will it apply to any claims under the Company’s indemnity of the several underwriters of the Initial Public Offering (the “Underwriters”) against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). However, the Company has not asked the Sponsor to reserve for such indemnification obligations, nor has the Company independently verified whether the Sponsor has sufficient funds to satisfy its indemnity obligations and the Company believes that the Sponsor’s only assets are securities of the Company. Therefore, the Company cannot assure that the Sponsor will be able to satisfy those obligations.