Company: MBVI
Filing Date: 2025-08-26
Form Type: 8-A12B
Source: 0001213900-25-080538
Chunk: 0

Company: M3-Brigade Acquisition VI Corp.
Filing Date: 2025-08-26
Form: 8-A12B
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<div align='center'>As filed with the Securities and Exchange Commission on August 26, 2025

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

PURSUANT TO SECTION 12(b) OR 12(g) OF THE

SECURITIES EXCHANGE ACT OF 1934

M3-BRIGADE ACQUISITION VI CORP.

(Exact Name of Registrant as specified in its charter)</div>

| Cayman Islands                          |     |                 N/A |
| (State or other Jurisdiction            |     |    (I.R.S. Employer |
| of Incorporation)                       |     | Identification No.) |
| 1700 Broadway – 19th Floor              |     |                     |
| New York, NY 10019                      |     |               10019 |
| (Address of principal executive office) |     |           -Zip Code |

Securities to be registered pursuant to Section 12(b) of the Act:

| Title of each class to be so registered                                                                          |     | Name of each exchange on which 
 each class is to be registered |
| Units, each consisting of one Class A ordinary share and one-third of one redeemable warrant                     |     | The Nasdaq Stock Market LLC    |
| Class A ordinary shares, par value $0.0001 per share                                                             |     | The Nasdaq Stock Market LLC    |
| Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share |     | The Nasdaq Stock Market LLC    |

If this form relates to the registration of a class of securities pursuant
to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), check the following box. ☒

If this form relates to the registration of a class of securities pursuant
to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d) or (e), check the following box. ☐

If this form relates to the registration of a class of securities concurrently
with a Regulation A offering, check the following box. ☐

Securities Act registration statement file number to which this form
relates (if applicable): 333-289225

Securities to be registered pursuant to Section 12(g) of the Act: N/A.

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