Marex Group plc (MRX) holders MASP Investor and BXR report 0% stake

Rhea-AI Filing Summary

Marex Group plc is the issuer of Common Stock with a par value of $0.001551 per share, identified by CUSIP G5S37H101. This Schedule 13G/A (Amendment No. 2) is filed by MASP Investor Limited Partnership, its general partner Forty Two Point Two Acquisition Limited, and BXR Group Holdings Limited.

The reporting group states that, as of the reporting date, Forty Two Point Two Acquisition Limited directly holds 0 shares of Marex Group plc, and each reporting person has 0 shares beneficially owned, representing 0% of the outstanding common stock. They report no sole or shared voting power and no sole or shared dispositive power over Marex Group plc shares, indicating that they now own 5 percent or less of this class of securities.

Key Figures

Par value per share: $0.001551 per share CUSIP: G5S37H101 Shares beneficially owned: 0 shares +3 more

6 metrics

Par value per share $0.001551 per share Common Stock of Marex Group plc

CUSIP G5S37H101 Identifier for Marex Group plc Common Stock

Shares beneficially owned 0 shares FTPTAL directly held 0 Shares as of the date hereof

Ownership percentage 0 % Percent of Marex Group plc common stock class owned by the reporting persons

Sole voting power 0 Number of shares over which each reporting person has sole voting power

Shared voting power 0 Number of shares over which each reporting person has shared voting power

Key Terms

beneficial ownership, Sole Voting Power, Dispositive Power, Schedule 13G/A

4 terms

beneficial ownership financial

"was deemed to have beneficial ownership of the Shares previously held"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole Voting Power financial

"5 | Sole Voting Power 0.00 6 | Shared Voting Power 0.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Dispositive Power financial

"7 | Sole Dispositive Power 0.00 8 | Shared Dispositive Power 0.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Schedule 13G/A regulatory

"Item 5. | Ownership of 5 Percent or Less of a Class."

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/10/2026 - 10:30 AM Accepted by SEC EDGAR 08/10/2026 - 10:29 AM Learn about SEC filing dates

FAQ

What does this Schedule 13G/A filing mean for Marex Group plc (MRX)?

The filing shows the reporting group now has 0 shares and 0% beneficial ownership of Marex Group plc common stock, confirming they currently hold 5 percent or less of this class of securities.

Who are the reporting persons in this Marex Group plc (MRX) Schedule 13G/A?

The reporting persons are MASP Investor Limited Partnership, its general partner Forty Two Point Two Acquisition Limited, and BXR Group Holdings Limited, all previously associated with beneficial ownership of Marex Group plc shares.

How many Marex Group plc (MRX) shares are beneficially owned by MASP Investor LP now?

As of the reporting date, MASP Investor LP, acting through its general partner, reports 0 shares beneficially owned and therefore a 0% ownership stake in Marex Group plc common stock.

What voting power do the filers report over Marex Group plc (MRX) shares?

The filers report 0 shares with sole voting power and 0 shares with shared voting power, indicating they currently have no voting authority over Marex Group plc common stock.

What is the class of securities covered in this Marex Group plc (MRX) Schedule 13G/A?

The class of securities is Marex Group plc Common Stock with a par value of $0.001551 per share, identified by CUSIP number G5S37H101 in the ownership report.

Why does the Marex Group plc (MRX) Schedule 13G/A mention ownership of 5 percent or less?

Item 5 states that the reporting persons now have ownership of 5 percent or less of the Marex Group plc common stock class, reflecting their current 0% beneficial ownership position.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Marex Group plc

(Name of Issuer)

Common Stock, par value $0.001551 per share

(Title of Class of Securities)

G5S37H101

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G5S37H101

1

Names of Reporting Persons

MASP Investor Limited Partnership

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

JERSEY

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: MASP Investor Limited Partnership ("MASP Investor LP") acts through its general partner Forty Two Point Two Acquisition Limited ("FTPTAL"). FTPTAL, in its capacity as general partner of MASP Investor LP, was the record holder of the Shares previously reported herein. FTPTAL is indirectly wholly-owned by BXR Group Holdings Limited, which was deemed to have beneficial ownership of the Shares previously held directly by FTPTAL, in its capacity as general partner of MASP Investor LP.

SCHEDULE 13G

CUSIP Number(s): G5S37H101

1

Names of Reporting Persons

Forty Two Point Two Acquisition Limited

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

VIRGIN ISLANDS, BRITISH

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: MASP Investor LP acts through its general partner FTPTAL. FTPTAL, in its capacity as general partner of MASP Investor LP, was the record holder of the Shares previously reported herein. FTPTAL is indirectly wholly-owned by BXR Group Holdings Limited, which was deemed to have beneficial ownership of the Shares previously held directly by FTPTAL, in its capacity as general partner of MASP Investor LP.

SCHEDULE 13G

CUSIP Number(s): G5S37H101

1

Names of Reporting Persons

BXR Group Holdings Limited

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

VIRGIN ISLANDS, BRITISH

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: MASP Investor LP acts through its general partner FTPTAL. FTPTAL, in its capacity as general partner of MASP Investor LP, was the record holder of the Shares previously reported herein. FTPTAL is indirectly wholly-owned by BXR Group Holdings Limited, which was deemed to have beneficial ownership of the Shares previously held directly by FTPTAL, in its capacity as general partner of MASP Investor LP.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Marex Group plc
(b)	Address of issuer's principal executive offices: 155 Bishopsgate, London, X0 EC2M 3TQ
Item 2.
(a)	Name of person filing:
(b)	Address or principal business office or, if none, residence:
(c)	Citizenship: (i) MASP Investor Limited Partnership ("MASP Investor LP") 44 Esplanade, St. Helier, JE4 9WG, Jersey Citizenship: Limited partnership established under the laws of Jersey (ii) Forty Two Point Two Acquisition Limited ("FTPTAL") Little Denmark Building, PO Box 4584, Road Town, Tortola, British Virgin Islands Citizenship: Company organized under the laws of the British Virgin Islands (iii) BXR Group Holdings Limited ("BXR Group") Little Denmark Building, PO Box 4584, Road Town, Tortola, British Virgin Islands Citizenship: Company organized under the laws of the British Virgin Islands
(d)	Title of class of securities: Common Stock, par value $0.001551 per share
(e)	CUSIP No.: G5S37H101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: As of the date hereof, FTPTAL directly held 0 Shares. MASP Investor LP acts through its general partner FTPTAL. FTPTAL is indirectly wholly-owned by BXR Group, which was deemed to have beneficial ownership of the Shares previously held directly by FTPTAL, in its capacity as general partner of MASP Investor LP.
(b)	Percent of class:
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

MASP Investor Limited Partnership

Signature:	/s/ Jacqueline Daley
Name/Title:	Jacqueline Daley / Director, Forty Two Point Two Acquisition Limited, as General Partner
Date:	08/10/2026

Forty Two Point Two Acquisition Limited

Signature:	/s/ Jacqueline Daley
Name/Title:	Jacqueline Daley / Director
Date:	08/10/2026

BXR Group Holdings Limited

Signature:	/s/ Christina Rodriguez
Name/Title:	Christina Rodriguez / Director
Date:	08/10/2026