X0202 SCHEDULE 13D/A 0001024896 XXXXXXXX LIVE 2 Class A Ordinary Shares, par value $0.0001 per share 03/23/2026 false 0002016072 G63212107 M3-Brigade Acquisition V Corp.

1700 Broadway, 19th Floor New York NY 10019

Brandon Lutnick (212) 938-5000 110 East 59th Street New York NY 10022 0001024896 N CANTOR FITZGERALD, L. P. AF WC N DE 0.00 0.00 0.00 0.00 0.00 N 0 PN 0001251145 N CF GROUP MANAGEMENT INC. AF WC N NY 0.00 0.00 0.00 0.00 0.00 N 0 CO 0000017018 N CANTOR FITZGERALD & CO. WC N NY 0.00 0.00 0.00 0.00 0.00 N 0 BD PN 0001219066 N CANTOR FITZGERALD SECURITIES AF WC N NY 0.00 0.00 0.00 0.00 0.00 N 0 PN 0002048880 N Brandon Lutnick AF WC N X1 0.00 0.00 0.00 0.00 0.00 N 0 IN Class A Ordinary Shares, par value $0.0001 per share M3-Brigade Acquisition V Corp. 1700 Broadway, 19th Floor New York NY 10019 This statement on Schedule 13D amends the Schedule 13D of the Reporting Persons that was originally filed with the Securities and Exchange Commission (the "SEC") on December 19, 2025, as amended on March 2, 2026 (the "Schedule 13D") with respect to the Class A Ordinary Shares, par value $0.0001 per share ("Class A Ordinary Shares") of M3-Brigade Acquisition V Corp (the "Issuer"). This amendment to the Schedule 13D is being filed by the Reporting Persons and constitutes Amendment No. 2 to the Schedule 13D. Capitalized terms used but not defined herein have the meanings given to such terms in the Schedule 13D. This Amendment No. 2 amends Items 3, 4 and 5, as set forth below. This is the final amendment to the Schedule 13D and constitutes an "exiting filing" for the Reporting Persons. Item 3 of the Schedule 13D is hereby amended and restated as follows: As of the time of filing, the Reporting Persons no longer beneficially owned any Class A Ordinary Shares; as such Item 3 is no longer applicable. Item 4 of the Schedule 13D is hereby amended and restated as follows: The Reporting Persons have disposed of all Class A Ordinary Shares previously owned by them through privately negotiated transactions. See cover pages pgs. 2-5, which are incorporated by reference herein. The information set forth in Item 13 (Percent of Class Represented by Amount in Row (11)) on cover pgs. 2-5 for each of the Reporting Persons is based on 28,750,000 Class A Ordinary Shares issued and outstanding as of March 12, 2026, as reported in the Issuer's Form 10-K for the year ended December 31, 2025, filed on March 12, 2026. As of the date hereof, the Reporting Persons no longer beneficially owned any Class A Ordinary Shares. See response (a) above. Except as described in this Schedule 13D, there have been no transactions in the Class A Ordinary Shares effected by the Reporting Persons since the most recent filing of Schedule 13D, other than brokerage transactions effected by CF&Co. on behalf of customers in the ordinary course of its business. CF&Co. agreed to dispose of 7,779,865 Class A Ordinary Shares described in this Schedule 13D on March 24, 2026, in privately negotiated transactions, at a price of $10.80 per Class A Ordinary Share. Not applicable. March 25, 2026. CANTOR FITZGERALD, L. P. /s/ Brandon G. Lutnick 03/25/2026 CF GROUP MANAGEMENT INC. /s/ Brandon G. Lutnick 03/25/2026 CANTOR FITZGERALD & CO. /s/ Pascal Bandelier 03/25/2026 CANTOR FITZGERALD SECURITIES /s/ Pascal Bandelier 03/25/2026 Brandon Lutnick /s/ Brandon G. Lutnick 03/25/2026