Related Party Transactions	6 Months Ended
Jun. 30, 2025
Related Party Transactions [Abstract]
Related Party Transactions	Note 5 — Related Party Transactions *Founder Shares* On June 6, 2025, the Sponsor made a capital contribution of $25,000, or approximately $0.003 per share, to cover certain of the Company’s expenses, for which the Company issued 8,625,000 founder shares to the Sponsor. Up to 1,125,000 of the founder shares may be surrendered by the Sponsor for no consideration depending on the extent to which the underwriters’ over-allotment is exercised. On August 28, 2025, the underwriters exercised their over-allotment option in full as part of the closing of the Initial Public Offering. As such, the 1,125,000 founder shares are no longer subject to forfeiture. On August 28, 2025, the Sponsor granted membership interests equivalent to an aggregate of 15,000 founder shares to a director of the Company in exchange for his services through the Company’s initial Business Combination. The founder shares, represented by such membership interests, will remain with the Sponsor if the holder of such membership interests is no longer serving the Company prior to the initial Business Combination. The membership interest assignment of the founder shares to the holders of such interests are in the scope of FASB ASC Topic 718, “Compensation-Stock Compensation” (“ASC 718”). Under ASC 718, stock-based compensation associated with equity-classified awards is measured at fair value upon the assignment date. The total fair value of the 15,000 founder shares represented by such membership interests assigned to the director on August 28, 2025 is $50,745 or $3.383 per share. The Company established the initial fair value founder shares on August 28, 2025, the date of the grant agreement, using a calculation prepared by a third-party valuation team which takes into consideration the discount for lack of marketability of 1.85%, risk-free rate of 3.65%, and volatility of 7.5%. The founder shares are classified as Level 3 at the measurement date due to the use of unobservable inputs, and other risk factors. The membership interests were assigned subject to a performance condition (i.e., providing services through Business Combination). Stock-based compensation would be recognized at the date a Business Combination is considered probable (i.e., upon consummation of a Business Combination) in an amount equal to the number of membership interests that ultimately vest times the assignment date fair value per share (unless subsequently modified) less the amount initially received for the assignment of the membership interests. As of June 30, 2025, the Company determined that the initial Business Combination is not considered probable and therefore no compensation expense has been recognized. The Company’s initial shareholders have agreed not to transfer, assign or sell any of their founder shares and any Class A ordinary shares issued upon conversion thereof until the earlier to occur of (i) one year after the completion of the initial Business Combination or (ii) the date on which the Company completes a liquidation, merger, share exchange or other similar transaction after the initial Business Combination that results in all of the Company’s shareholders having the right to exchange their Class A ordinary shares for cash, securities or other property. Any permitted transferees will be subject to the same restrictions and other agreements of the Company’s initial shareholders with respect to any founder shares (the “Lock-up”). Notwithstanding the foregoing, if (1) the closing price of the Class A ordinary shares equals or exceeds $12.00 per share (as adjusted for share subdivisions, share capitalizations, share consolidations, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the initial Business Combination or (2) if the Company consummates a transaction after the initial Business Combination which results in the Company’s shareholders having the right to exchange their shares for cash, securities or other property, the founder shares will be released from the Lock-up. *Promissory Note — Related Party* The Sponsor has agreed to loan the Company an aggregate of up to $300,000 to be used for a portion of the expenses of the Initial Public Offering. The loan is non-interest bearing, unsecured and due at the earlier of December 31, 2025 or the closing of the Initial Public Offering. The Company had no borrowings under the promissory note as of June 30, 2025. Borrowings under the promissory note are no longer available. *Advances from Related Party* Advances from related party represents payment of expenses by the Sponsor that are not covered by the Promissory Note. As of June 30, 2025, total advances from related party amounted to $10,420. These advances are due on demand. *Related Party Loans* In order to finance transaction costs in connection with a Business Combination, the Sponsor or an affiliate of the Sponsor or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (the “Working Capital Loans”). If the Company completes a Business Combination, the Company would repay the Working Capital Loans. In the event that a Business Combination does not close, the Company may use amounts held outside the Trust Account to repay the Working Capital Loans but no proceeds from the Trust Account would be used to repay the Working Capital Loans. Up to $1,500,000 of such Working Capital Loans may be convertible into private placement warrants of the post Business Combination entity at a price of $1.50 per warrant at the option of the lender. The warrants would be identical to the Private Placement Warrants. As of June 30, 2025, no such Working Capital Loans were outstanding.

Related Party Transactions

6 Months Ended

Jun. 30, 2025

Note 5 — Related Party Transactions

Founder Shares

On June 6, 2025, the Sponsor made a capital contribution of $25,000, or approximately $0.003 per share, to cover certain of the Company’s expenses, for which the Company issued 8,625,000 founder shares to the Sponsor. Up to 1,125,000 of the founder shares may be surrendered by the Sponsor for no consideration depending on the extent to which the underwriters’ over-allotment is exercised. On August 28, 2025, the underwriters exercised their over-allotment option in full as part of the closing of the Initial Public Offering. As such, the 1,125,000 founder shares are no longer subject to forfeiture.

On August 28, 2025, the Sponsor granted membership interests equivalent to an aggregate of 15,000 founder shares to a director of the Company in exchange for his services through the Company’s initial Business Combination. The founder shares, represented by such membership interests, will remain with the Sponsor if the holder of such membership interests is no longer serving the Company prior to the initial Business Combination. The membership interest assignment of the founder shares to the holders of such interests are in the scope of FASB ASC Topic 718, “Compensation-Stock Compensation” (“ASC 718”). Under ASC 718, stock-based compensation associated with equity-classified awards is measured at fair value upon the assignment date. The total fair value of the 15,000 founder shares represented by such membership interests assigned to the director on August 28, 2025 is $50,745 or $3.383 per share. The Company established the initial fair value founder shares on August 28, 2025, the date of the grant agreement, using a calculation prepared by a third-party valuation team which takes into consideration the discount for lack of marketability of 1.85%, risk-free rate of 3.65%, and volatility of 7.5%. The founder shares are classified as Level 3 at the measurement date due to the use of unobservable inputs, and other risk factors. The membership interests were assigned subject to a performance condition (i.e., providing services through Business Combination). Stock-based compensation would be recognized at the date a Business Combination is considered probable (i.e., upon consummation of a Business Combination) in an amount equal to the number of membership interests that ultimately vest times the assignment date fair value per share (unless subsequently modified) less the amount initially received for the assignment of the membership interests. As of June 30, 2025, the Company determined that the initial Business Combination is not considered probable and therefore no compensation expense has been recognized.

The Company’s initial shareholders have agreed not to transfer, assign or sell any of their founder shares and any Class A ordinary shares issued upon conversion thereof until the earlier to occur of (i) one year after the completion of the initial Business Combination or (ii) the date on which the Company completes a liquidation, merger, share exchange or other similar transaction after the initial Business Combination that results in all of the Company’s shareholders having the right to exchange their Class A ordinary shares for cash, securities or other property. Any permitted transferees will be subject to the same restrictions and other agreements of the Company’s initial shareholders with respect to any founder shares (the “Lock-up”). Notwithstanding the foregoing, if (1) the closing price of the Class A ordinary shares equals or exceeds $12.00 per share (as adjusted for share subdivisions, share capitalizations, share consolidations, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the initial Business Combination or (2) if the Company consummates a transaction after the initial Business Combination which results in the Company’s shareholders having the right to exchange their shares for cash, securities or other property, the founder shares will be released from the Lock-up.

Promissory Note — Related Party

The Sponsor has agreed to loan the Company an aggregate of up to $300,000 to be used for a portion of the expenses of the Initial Public Offering. The loan is non-interest bearing, unsecured and due at the earlier of December 31, 2025 or the closing of the Initial Public Offering. The Company had no borrowings under the promissory note as of June 30, 2025. Borrowings under the promissory note are no longer available.

Advances from Related Party

Advances from related party represents payment of expenses by the Sponsor that are not covered by the Promissory Note. As of June 30, 2025, total advances from related party amounted to $10,420. These advances are due on demand.

Related Party Loans

In order to finance transaction costs in connection with a Business Combination, the Sponsor or an affiliate of the Sponsor or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (the “Working Capital Loans”). If the Company completes a Business Combination, the Company would repay the Working Capital Loans. In the event that a Business Combination does not close, the Company may use amounts held outside the Trust Account to repay the Working Capital Loans but no proceeds from the Trust Account would be used to repay the Working Capital Loans. Up to $1,500,000 of such Working Capital Loans may be convertible into private placement warrants of the post Business Combination entity at a price of $1.50 per warrant at the option of the lender. The warrants would be identical to the Private Placement Warrants. As of June 30, 2025, no such Working Capital Loans were outstanding.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-URI https://asc.fasb.org/1943274/2147480990/946-20-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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-Section 50
-Paragraph 1
-Subparagraph (b)
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-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

+ Details

M3-Brigade Acquisition VI Corp. 10-Q