Investor Presentation February 2024

Proven strength in Commercial Banking with advantaged market share . A relationship-based commercial bank; #4 commercial lender¹ in North America - In Canada: Top tier commercial banking business, #2 market share for business loans² In the U.S.: Diversified national business, supported by industry knowledge and top-tier share in flagship markets Integrated and leading cash management, treasury and payment capabilities Best-in-class customer experience and industry leading client loyalty Sole or lead position in ~90% of relationships Diversified growth, consistent risk appetite and underwriting, quality and reputation of the business Commercial Banking Revenue as % of Operating Groups Revenue³ LTM Q1'24 Other 73% Canadian Commercial Banking 9% U.S. Commercial Banking 18% Commercial Loans by Industry4 - Q1'24 Manufacturing 11% Retail Trade 11% Financial 15% WORLD FINANCE BEST COMMERCIAL BANK. CANADA 2015-2023 BMO Recognized as the best commercial bank in Canada for nine consecutive years Wholesale Trade 8% Q1'24 $290B Agriculture 6% WORLD FINANCE BEST COMMERCIAL BANK, US 2023 Commercial Real Estate 19% Recognized as the best commercial bank in the U.S. Transportation 5% Construction 2% Other Commercial 3% BMO Prior period amounts have been reclassified to conform with the current period presentation 1 Share of commercial loans based upon publicly available U.S. regulatory filings (FR Y-9Cs and FFIEC 002s) and internal analysis 2 Ranked #2 in market share based on business loans $0-$25MM and $0-$100MM. Source: Canadian Bankers Association as at June 2023 3 Based on reported results; Percentages determined excluding results in Corporate Services 4 Other Commercial includes industry segments that are each <1% of commercial gross loans and acceptances BMOM Service Industries 20% Investor Presentation ⚫ February 2024 10

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