Financial Results

Bank of the West: Positioned for growth post-conversion Total BMO Franchise strength • Core performance in line with expectations Strong capital position Successful conversion of customers and systems Scale benefits In-year cost savings (US$) -$550MM- $220MM F23 $770MM F24 Areas of opportunity US$800MM run rate cost synergies Executing revenue synergy opportunities to drive PPPT1 growth Personal & Business Banking Strong digital customer acquisition performance since closing, 3x increase² in digital checking sales • Continued strong employee retention Doubled our size: 1,000+ branches 4 million customers Branch sales to service FTE >2x BMO Wealth Management • Commercial Banking BMO Capital Markets . • • +7% in AUM growth since closing Industry-leading retention through brokerage conversion (99%+ clients converted) Strong salesforce retention in California Strong onboarding of new clients since closing • Strong employee retention Industry expertise across a broader geography (e.g. Media, Food and Agriculture) • ~20 transactions executed across Investment Banking, Global Markets and M&A • 1,500+ BOTW clients onboarded to BMO Capital Markets (rates, FX, fixed income) Custom lending capabilities Vertical expertise Expanded investment suite and dedicated research TPS volume (# wires) +8% Pre-conv Post-conv Thousands of trades executed from closing to conversion Pre-conv Post-conv Investment penetration BOTW +20% BMO Wealth penetration with commercial clients 2x BOTW BMO Accelerating revenue synergies through expanded client coverage and strong M&A pipelines This slide contains forward-looking statements. Refer to the Caution Regarding Forward-Looking Statements on slide 2 1 Reported and adjusted pre-provision pre-tax earnings (PPPT) are non-GAAP measures 2 October 2023 digital checking sales compared against last 12 months BMOM Financial Results ⚫ December 1, 2023 10

View entire presentation