Marex Group Ltd

Non-IFRS Financial Measures and Key Performance Indicators continued

Adjusted Return on Equity continued

We believe Adjusted Return on Equity is a useful measure as it allows management to assess the return on the equity belonging to the holders of the Group’s share capital.

The most directly comparable IFRS Accounting Standards measure for Adjusted Return on Equity is Return on Equity, which is calculated as profit after tax for the period divided by average equity. Average Equity for the three months ended 30 September 2026 and 2025 is calculated as the average of total equity at 30 June of the current year and 30 September of the current year. Average Equity for the nine months ended 30 September 2026 and 2025 is calculated as the average Equity as at 31 December of the prior period, 31 March, 30 June and 30 September of the current period.

For the three months ended 30 September 2026 and 2025, Return on Equity is calculated for comparison purposes on an annualized basis as Profit After Tax for the period multiplied by four and then divided by Average Equity for the period. For the nine months ended 30 September 2026 and 2025, Return on Equity is calculated for comparison purposes on an annualized basis as Profit After Tax for the period divided by nine and multiplied by twelve and then divided by average Equity for the period.

Adjusted Basic Earnings per Share, Adjusted Diluted Earnings per Share and Adjusted 12-Month Basic Earnings per Share

Adjusted Basic Earnings per Share is defined as the Adjusted Profit After Tax Attributable to Common Equity for the period divided by the weighted average number of ordinary shares for the period. We believe Adjusted Basic Earnings per Share is a useful measure as it allows management to assess the profitability of our business per share. The most directly comparable IFRS Accounting Standards metric is Basic Earnings per Share. This metric has been designed to highlight the Adjusted Profit After Tax Attributable to Common Equity over the available share capital of the Group.

Adjusted Diluted Earnings per Share is defined as the Adjusted Profit After Tax Attributable to Common Equity for the period divided by the diluted weighted average shares for the period. We believe Adjusted Diluted Earnings per Share is a useful measure as it allows management to assess the profitability of our business per share on a diluted basis. Dilution is calculated in the same way as it has been for Diluted Earnings per Share. The most directly comparable IFRS Accounting Standards metric is Diluted Earnings per Share.

The Group repurchased $94.7m in aggregate principal amount of its $100m 13.25% Contingent Convertible Perpetual Notes (the “AT1 Notes”) for consideration in excess of their carrying amount of $10.8m. As the AT1 Notes were classified as equity under IAS 32, this excess was recognized directly in equity with no impact on the income statement. In accordance with IFRS accounting standards, the excess is deducted in arriving at Basic and Diluted Earnings per Share. Adjusted Basic and Adjusted Diluted Earnings per Share do not deduct this amount, as it is one-off in nature and not reflective of the underlying performance of the business.

Adjusted Basic Earnings per Share on a trailing 12-month basis is defined as the sum of the Adjusted Basic Earnings per Share for the last four quarters. For the period ended 30 September, it is calculated using the sum of the Adjusted Basic Earnings per Share for the quarters ended December 31 of the prior year, March 31, June 30 and September 30 of the current year. We believe Adjusted 12-Month Basic Earnings per Share is a useful measure as it allows management to assess the annualized profitability of our business per share on a trailing 12-month basis. The most directly comparable IFRS Accounting Standards metric is trailing 12-month Basic Earnings per Share.

We believe that these non-IFRS financial measures provide useful information to both management and investors by excluding certain items that management believes are not indicative of our ongoing operations. Our management uses these non-IFRS financial measures to evaluate our business strategies and to facilitate operating performance comparisons from period to period. We believe that these non-IFRS financial measures provide useful information to investors because they improve the comparability of our financial results between periods and provide for greater transparency of key measures used to evaluate our performance. In addition these non-IFRS financial measures are frequently used by securities analysts, investors and other interested parties in their evaluation of companies comparable to us, many of which present related performance measures when reporting their results.

These non-IFRS financial measures are used by different companies for differing purposes and are often calculated in different ways that reflect the circumstances of those companies. In addition, certain judgments and estimates are inherent in our process to calculate such non-IFRS financial measures. You should exercise caution in comparing these non-IFRS financial measures as reported by other companies.

These non-IFRS financial measures have limitations as analytical tools, and you should not consider them in isolation or as substitutes for analysis of our results as reported under IFRS Accounting Standards. Some of these limitations are:

•they do not reflect costs incurred in relation to the acquisitions that we have undertaken;

•they do not reflect impairment of goodwill;

•other companies in our industry may calculate these measures differently than we do, limiting their usefulness as comparative measures; and

•the adjustments made in calculating these non-IFRS measures are those that management considers to be not representative of our core operations and, therefore, are subjective in nature.

Accordingly, prospective investors should not place undue reliance on these non-IFRS financial measures.

Non-IFRS Financial Measures and Key Performance Indicators continued

Key Performance Indicators

We also use key performance indicators (“KPIs”) such as Average Balances and Contracts Cleared to assess the performance of our business and believe that these KPIs provide useful information to both management and investors by showing the growth of our business across the periods presented.

Our management uses these KPIs to evaluate our business strategies and to facilitate operating performance comparisons from period to period. We define certain terms used in this release as follows:

“FTE” means the number of our full-time equivalents as of the end of a given period, which includes permanent employees and contractors.

“Average FTE” means the average number of our full-time equivalents over the period, including permanent employees and contractors.

“Average Balances” means the average of the daily holdings in exchanges, banks and other investments over the period. Previously, average balances were calculated as the average month-end amount of segregated and non-segregated client balances that generated interest income over a given period.

"Group capital ratio" means our Group capital resources as a percentage of the Group capital requirement for such period.

“Contracts Cleared” means the total number of contracts cleared in a given period.

“Volumes” means the volume of exchange-traded derivatives transacted in a given period.

Clearing Market Volumes are calculated as futures and options traded and/or cleared on Marex key exchanges (CBOT, CME, Eurex, Euronext, ICE, LME, NYMEX, COMEX, SGX).

Reconciliation of Non-IFRS Financial Measures and Key Performance Indicators:

1. A bargain purchase gain was recognized as a result of the Group's acquisition of Darton Group Limited (“Darton”).

2. This represents the amortization charge for the period of acquired brands and customer lists.

3. Owner fees relate to management services to parties associated with the former ultimate controlling party based on a percentage of the Group’s profitability. Owner fees are excluded from operating expenses as they do not form part of the operation of the business and ceased to be incurred after the completion of our offering.

4. Costs relating to the public offerings of ordinary shares by certain selling shareholders.

5. Merger and acquisition costs: These primarily consist of professional advisory and legal fees in relation to M&A activity.

6. Redomiciliation costs: Costs incurred in relation to the migration of the Group's TopCo to Bermuda.

7. Tax and the tax effect on Adjusting Items represents the tax effect on the Group's non-operating adjusting items and the tax benefit of the coupons.

8. Profit attributable to Additional Tier 1 (AT1) and hybrid perpetual note holders includes coupons, which are accounted for as dividends. $500m of hybrid capital was issued in June 2026.

9. Loss/(Profit) attributable to non-controlling interest relates to the Group's acquisition of Hamilton Court.

10. Adjusted Profit Before Tax Margin is calculated by dividing Adjusted Profit Before Tax (as defined above) by revenue for the period.

11. The weighted average numbers of diluted shares used in the calculation of earnings per share are as follows: three months ended September 30, 2026 75,829,637; three months ended September 30, 2025 75,381,685; nine months ended September 30, 2026 75,544,617; nine months ended September 30, 2025 75,723,200.

12. Average Common Equity for each three-month period is calculated as the average balance of total equity minus additional Tier 1 capital, hybrid perpetual instruments and non-controlling interest as at June 30 and September 30 of the current year. Average Common Equity for each nine month period is calculated as the average balance of total equity minus additional Tier 1 capital, hybrid perpetual instruments and non-controlling interest as at December 31 of the prior year and March 31, June 30 and September 30 of the current year.