Cantor exits 7.78M M3-Brigade (NYSE: MBAV) shares in open-market sale

Rhea-AI Filing Summary

M3-Brigade Acquisition V Corp. reported a sizeable insider sale by entities associated with Cantor Fitzgerald. On March 24, 2026, these reporting persons sold 7,779,865 Class A Ordinary Shares of MBAV in an open-market transaction at $10.80 per share. Following this sale, the reporting position in these Class A shares was reduced to zero shares, indicating a full exit from this particular holding as shown in the filing.

Insights

Equity ownership & insider-transaction analyst

Large open-market sale fully exits Cantor’s reported MBAV stake.

Entities associated with Cantor Fitzgerald sold 7,779,865 Class A Ordinary Shares of M3-Brigade Acquisition V Corp. at $10.80 per share in an open-market transaction. The Form 4 shows no remaining Class A holdings after this trade.

This is a clear, discretionary sale (transaction code S), rather than option exercise or tax withholding. The absence of derivative positions in the filing suggests this was a straightforward reduction of equity exposure rather than part of a broader options strategy.

The filing does not provide context such as trading plans or overall company share count, so the economic significance depends on MBAV’s total float and prior Cantor-related ownership. Subsequent company disclosures or ownership filings may clarify how this block relates to overall shareholder structure.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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X

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

CANTOR FITZGERALD, L. P.

(Last) (First) (Middle)

110 EAST 59TH STREET

(Street)

NEW YORK NEW YORK 10022

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
M3-Brigade Acquisition V Corp. [ MBAV ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			See Remarks

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/24/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Ordinary Shares	03/24/2026		S		7,779,865	A	$10.8	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

CANTOR FITZGERALD, L. P.

(Last) (First) (Middle)

110 EAST 59TH STREET

(Street)

NEW YORK NEW YORK 10022

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			See Remarks

1. Name and Address of Reporting Person^*

CANTOR FITZGERALD & CO.

(Last) (First) (Middle)

110 EAST 59TH STREET

(Street)

NEW YORK NEW YORK 10022

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			See Remarks

1. Name and Address of Reporting Person^*

CANTOR FITZGERALD SECURITIES

(Last) (First) (Middle)

110 EAST 59TH STREET

(Street)

NEW YORK NEW YORK 10022

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			See Remarks

1. Name and Address of Reporting Person^*

CF GROUP MANAGEMENT INC

(Last) (First) (Middle)

110 EAST 59TH STREET

(Street)

NEW YORK NEW YORK 10022

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			See Remarks

1. Name and Address of Reporting Person^*

Lutnick Brandon

(Last) (First) (Middle)

110 EAST 59TH SREET

(Street)

NEW YORK NEW YORK 10022

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			See Remarks

Explanation of Responses:

Remarks:

(1) As a result of the sales reported herein, the Reporting Persons no longer own 10% or more of the Issuer's outstanding Class A Ordinary Shares. The Reporting Persons are filing this Form 4 to report that they are no longer Reporting Persons of the Issuer.

	/s/ Brandon Lutnick	03/25/2026
	/s/ Brandon Lutnick, as Chief Executive Officer of Cantor Fitzgerald, L.P.	03/25/2026
	/s/ Brandon Lutnick, as Chief Executive Officer of CF Group Management Inc.	03/25/2026
	/s/ Pascal Bandelier, as Co-CEO of Cantor Fitzgerald Securities	03/25/2026
	/s/ Pascal Bandelier, as Co-CEO of Cantor Fitzgerald & Co.	03/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Cantor Fitzgerald report in MBAV on this Form 4?

Cantor Fitzgerald-related reporting persons disclosed a large open-market sale of 7,779,865 Class A Ordinary Shares of M3-Brigade Acquisition V Corp. (MBAV) at $10.80 per share. This transaction represents a complete exit from their reported Class A share position.

How many M3-Brigade (MBAV) shares were sold and at what price?

The filing shows a sale of 7,779,865 MBAV Class A Ordinary Shares at $10.80 per share. This was a single non-derivative open-market transaction, indicating a sizable disposal of equity rather than a small routine trade or option exercise event.

Did Cantor Fitzgerald retain any M3-Brigade (MBAV) Class A shares after this sale?

According to the Form 4, total Class A Ordinary Shares held following the transaction were 0. This indicates that, as reported in this filing, the Cantor Fitzgerald-related reporting position in MBAV Class A shares was fully sold in this open-market transaction.

Was the M3-Brigade (MBAV) insider sale an open-market transaction or related to derivatives?

The transaction is coded “S,” meaning an open-market or private sale of non-derivative Class A Ordinary Shares. The derivative section of the filing is empty, so this sale did not involve exercising options or converting other securities into MBAV shares first.

Who are the reporting persons involved in the MBAV Form 4 sale?

Reporting persons listed include Cantor Fitzgerald, L.P., Cantor Fitzgerald & Co., Cantor Fitzgerald Securities, CF Group Management Inc., and Brandon Lutnick. They collectively reported the 7,779,865-share open-market sale of MBAV Class A Ordinary Shares at $10.80 per share.