M3-Brigade Sponsor VI LLC - 26 Aug 2025 Form 3 Insider Report for M3-Brigade Acquisition VI Corp. (MBVI)

Role: 10%+ Owner
Signature: /s/ Mohsin Y. Meghji, as Authorized Signatory
Issuer symbol: MBVI
Transactions as of: 26 Aug 2025
Net transactions value: $0
Form type: 3
Filing time: 26 Aug 2025, 21:17:52 UTC
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
M3-Brigade Sponsor VI LLC	10%+ Owner	C/O M3-BRIGADE ACQUISITION VI CORP., 1700 BROADWAY, 19TH FLOOR, NEW YORK	/s/ Mohsin Y. Meghji, as Authorized Signatory	26 Aug 2025	0002073926

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	MBVI	Class B ordinary shares							26 Aug 2025	Class A ordinary shares	8,625,000		Direct	F1, F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	As described in the issuer's registration statement on Form S-1 (File No. 333-289225) under the heading "Description of Securities-Founder Shares", the Class B ordinary shares, par value $0.0001 per share, will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the issuer at the time of the issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment for share splits, share capitalizations, reorganizations, recapitalizations and the like, and certain anti-dilution rights and have no expiration date.
F2	The Class B ordinary shares beneficially owned by the reporting person include up to 1,125,000 shares that are subject to forfeiture to the extent the underwriters of the initial public offering of the issuer's securities do not exercise in full their over-allotment option as described in the issuer's registration statement.
F3	The managing member of M3-Brigade Sponsor VI LLC is M3-Brigade Acquisition Partners VI Corp., a Delaware corporation. Mohsin Y. Meghji is the sole director and Chief Executive Officer of M3-Brigade Acquisition Partners VI Corp. As such, Mr. Meghji may be deemed to have voting and investment discretion with respect to the securities held by the reporting person and may be deemed to have beneficial ownership of the securities held directly by the reporting person.