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 July 29, 2025

Mohsin Y. Meghji
Executive Chairman
M3-Brigade Acquisition VI Corp.
1700 Broadway 19th Floor
New York, NY 10019

 Re: M3-Brigade Acquisition VI Corp.
 Draft Registration Statement on Form S-1
 Submitted July 2, 2025
 CIK No. 0002073928
Dear Mohsin Y. Meghji:

 We have reviewed your draft registration statement and have the
following comments.

 Please respond to this letter by providing the requested information and
either
submitting an amended draft registration statement or publicly filing your
registration
statement on EDGAR. If you do not believe a comment applies to your facts and
circumstances or do not believe an amendment is appropriate, please tell us why
in your
response.

 After reviewing the information you provide in response to this letter
and your
amended draft registration statement or filed registration statement, we may
have additional
comments.

Draft Registration Statement on Form S-1 submitted July 2, 2025
Cover Page

1. Please revise to disclose whether redemptions will be subject to any
limitations, such
 as the limitation on redemption rights of shareholders holding 15% or
more of the
 shares sold in this offering, as you discuss on page 39 and elsewhere.
See Item
 1602(a)(2) of Regulation S-K.
2. We note your disclosure on page 23 that if you increase or decrease the
size of the
 offering, you will take steps to maintain the ownership of founder
shares by your
 initial shareholders at 20% of your issued and outstanding ordinary
shares upon the
 consummation of this offering. Please revise the cover page to address
this potential
 adjustment to the number of Class B ordinary shares held by the sponsor
and any
 other holders of your founder shares.
 July 29, 2025
Page 2

3. Where you discuss the Class B ordinary shares owned by your sponsor,
please expand
 to describe the potential adjustments to the one-to-one conversion and
the amount of
 Class A shares your sponsor may receive, and provide all of the
information required
 by Item 1602(a)(3) of Regulation S-K with respect to the amount of
compensation and
 other securities received or to be received by the SPAC sponsor, its
affiliates, and
 promoters. In this regard, we note disclosure elsewhere regarding the
repayment of up
 to $300,000 of loans to cover offering related and organizational
expenses and the
 repayment and possible conversion to warrants of up to $1,500,000 of
working capital
 loans. Also state the price at which the sponsor acquired the founder
shares. Finally,
 please provide a cross-reference, highlighted by prominent type or in
another manner,
 to the locations of related disclosures in the prospectus.
4. Where you discuss material dilution to your public shareholders, please
expand to
 state whether the cashless exercise of the private placement warrants,
the conversion
 of the working capital loans into warrants, and any other adjustments to
the number of
 Class B shares at the time of the offering or initial business
combination may result in
 a material dilution of the purchasers' equity interests. See Item
1602(a)(3) of
 Regulation S-K.
Summary, page 1

5. Please file as exhibits any agreements or contracts related to the
support M3 Partners
 and Brigade have agreed to provide to you in your pursuit of an initial
business
 combination, as you discuss on pages 3-4 and 110-111. See Item
601(b)(10) of
 Regulation S-K.
6. Please provide an analysis as to whether M3 Partners and Brigade are
affiliates of the
 sponsor or are promoters, each within the meaning of Securities Act Rule
405. If so,
 please provide related conflicts of interest disclosures on the cover
page and in
 the summary pursuant to Items 1602(a)(5) and (b)(7) of Regulation S-K.
7. Please expand your disclosure on pages 10 or 30, as appropriate, to
describe any
 limitations on extensions, including the number of times. See Item
1602(b)(4) of
 Regulation S-K.
8. Please revise to describe any plans to seek additional financings and
how the terms of
 additional financings may impact unaffiliated security holders. See Item
1602(b)(5) of
 Regulation S-K.
9. Please expand your disclosure outside of the table on page 13 to
describe the extent to
 which the conversion of working capital loans into warrants may result
in a material
 dilution of the purchasers' equity interests. See Item 1602(b)(6) of
Regulation S-K.
10. Please expand your disclosure on pages 42-43 to also describe conflicts
of interest
 relating to payments to your sponsor, officers or directors, or your or
their affiliates
 for services rendered prior to or in connection with the consummation of
your initial
 business combination, as referenced on page 41. See Item 1602(b)(7) of
Regulation S-
 K.
Proceeds to be held in trust account, page 29
 July 29, 2025
Page 3

11. We note the disclosure in this section and elsewhere that the proceeds
in the trust
 account will not be released until "(i) the completion of our initial
business
 combination or an earlier redemption in connection with the commencement
of the
 procedures to consummate the initial business combination if we
determine it is
 desirable to facilitate the completion of the initial business
combination." We also
 note that Nasdaq Rule IM-5101-2(a) states that "[a]t least 90% of the
gross proceeds
 from the initial public offering . . . must be deposited in a trust
account maintained by
 an independent trustee . . . ." It is unclear how the release of funds
earlier than the
 consummation of the initial business combination would comport with this
listing
 standard. Please revise for consistency with the Nasdaq Listing Rules.
Summary Financial Data, page 44

12. Please revise note (1) to the table on page 44 to more accurately
describe the
 calculation of working capital as adjusted, or advise.
Proposed Business, page 110

13. Please expand to describe the extent to which the SPAC sponsor, its
affiliates, and the
 promoters are involved in other special purpose acquisition companies,
including the
 Fifth SPAC. In this regard, we note your disclosure here that the
sponsor of the Fifth
 SPAC elected to sell its interest in the Fifth SPAC to an unaffiliated
third party.
 However, we also note your tabular disclosure on pages 152-153, which
indicates that
 certain of your officers and directors currently serve on the board of
the Fifth SPAC.
 See Item 1603(a)(3) of Regulation S-K.
Management
Executive Officer and Director Compensation, page 148

14. Please revise to disclose, as applicable, the founder shares allocated
to your
 independent directors and officers, as you discuss on page 12 and
elsewhere. See Item
 402, paragraphs (m) through (r), of Regulation S-K.
 Please contact Peter McPhun at 202-551-3581 or Jennifer Monick at
202-551-3295 if
you have questions regarding comments on the financial statements and related
matters.
Please contact Benjamin Holt at 202-551-6614 or Pamela Long at 202-551-3765
with any
other questions.

 Sincerely,

 Division of
Corporation Finance
 Office of Real
Estate & Construction
cc: Raphael M. Russo
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