Investor Presentation February 2024

Caution Regarding Forward-Looking Statements Bank of Montreal's public communications often include written or oral forward-looking statements. Statements of this type are included in this document, and may be included in other filings with Canadian securities regulators or the U.S. Securities and Exchange Commission, or in other communications. All such statements are made pursuant to the "safe harbor" provisions of, and are intended to be forward-looking statements under, the United States Private Securities Litigation Reform Act of 1995 and any applicable Canadian securities legislation. Forward-looking statements in this document may include, but are not limited to, statements with respect to our objectives and priorities for fiscal 2024 and beyond, our strategies or future actions, our targets and commitments (including with respect to net zero emissions), expectations for our financial condition, capital position, the regulatory environment in which we operate, the results of, or outlook for, our operations or the Canadian, U.S. and international economies, plans for the combined operations of BMO and Bank of the West and the financial, operational and capital impacts of the transaction, customer growth and support, sustainable lending and underwriting targets, sustainable investment targets, BMO's Climate Ambition, net zero financed emissions targets, reducing operational GHG emissions, inclusivity, diversity and development, and include statements made by our management. Forward-looking statements are typically identified by words such as "will", "would", "should", "believe", "expect", "anticipate", "project", "intend", "estimate", "plan", "goal", "commit", "target", "may", "schedule", "forecast", "outlook", "seek" and "could" or negative or grammatical variations thereof. By their nature, forward-looking statements require us to make assumptions and are subject to inherent risks and uncertainties, both general and specific in nature. Certain statements made in this document use a greater number and level of assumptions and estimates and are over longer time frames than many of our required disclosures. These assumptions and estimates are highly likely to change over time. Certain statements in this document are based on hypothetical or severely adverse scenarios and assumptions, and these statements should not necessarily be viewed as being representative of current or actual risk or forecasts of expected risk. In addition, our climate risk analysis and net-zero strategy remain under development, and the data underlying our analysis and strategy remain subject to evolution over time. As a result, we expect that certain disclosures made in this document are likely to be amended, updated or restated in the future as the quality and completeness of our data and methodologies continue to improve. There is significant risk that predictions, forecasts, conclusions or projections will not prove to be accurate, that our assumptions may not be correct, and that actual results may differ materially from such predictions, forecasts, conclusions or projections. We caution readers of this document not to place undue reliance on our forward-looking statements, as a number of factors - many of which are beyond our control and the effects of which can be difficult to predict - could cause actual future results, conditions, actions or events to differ materially from the targets, expectations, estimates or intentions expressed in the forward-looking statements. The future outcomes that relate to forward-looking statements may be influenced by many factors, including, but not limited to: general economic and market conditions in the countries in which we operate, including labour challenges; the anticipated benefits from acquisitions, including Bank of the West, are not realized; changes to our credit ratings; the emergence or continuation of widespread health emergencies or pandemics, and their impact on local, national or international economies, as well as their heightening of certain risks that may affect our future results; cyber and cloud security, including the threat of data breaches, hacking, identity theft and corporate espionage, as well as the possibility of denial of service resulting from efforts targeted at causing system failure and service disruption; technology resiliency; failure of third parties to comply with their obligations to us; political conditions, including changes relating to, or affecting, economic or trade matters; climate change and other environmental and social risks; the Canadian housing market and consumer leverage; inflationary pressures; global supply-chain disruptions; technological innovation and competition; changes in monetary, fiscal or economic policy; changes in laws, including tax legislation and interpretation, or in supervisory expectations or requirements, including capital, interest rate and liquidity requirements and guidance, and the effect of such changes on funding costs and capital requirements; weak, volatile or illiquid capital or credit markets; the level of competition in the geographic and business areas in which we operate; exposure to, and the resolution of, significant litigation or regulatory matters, our ability to successfully appeal adverse outcomes of such matters and the timing, determination and recovery of amounts related to such matters; the accuracy and completeness of the information we obtain with respect to our customers and counterparties; our ability to execute our strategic plans, complete proposed acquisitions or dispositions and integrate acquisitions, including obtaining regulatory approvals; critical accounting estimates and judgments, and the effects of changes in accounting standards, rules and interpretations on these estimates; operational and infrastructure risks, including with respect to reliance on third parties; global capital markets activities; the possible effects on our business of war or terrorist activities; natural disasters and disruptions to public infrastructure, such as transportation, communications, power or water supply; and our ability to anticipate and effectively manage risks arising from all of the foregoing factors. We caution that the foregoing list is not exhaustive of all possible factors. Other factors and risks could adversely affect our results including, but not limited to: the availability of comprehensive and high-quality GHG emissions data, the evolution of our lending portfolios over time, the need for active and continued participation of stakeholders (including enterprises, financial institutions and governmental and non-governmental organizations), the development and deployment of new technologies and industry-specific solutions, international cooperation, the development of regulations internationally, our ability to successfully implement various initiatives under expected time frames and the compliance of various third parties with our policies and procedures and legal requirements. For more information, please refer to the discussion in the Risks That May Affect Future Results section, and the sections related to credit and counterparty, market, insurance, liquidity and funding, operational non- financial, legal and regulatory, strategic, environmental and social, and reputation risk in the Enterprise-Wide Risk Management section of BMO's 2023 Annual Report, and the Risk Management section in BMO's First Quarter 2024 Report to Shareholders, all of which outline certain key factors and risks that may affect our future results. Investors and others should carefully consider these factors and risks, as well as other uncertainties and potential events, and the inherent uncertainty of forward-looking statements. We do not undertake to update any forward-looking statements, whether written or oral, that may be made from time to time by the organization or on its behalf, except as required by law. The forward-looking information contained in this document is presented for the purpose of assisting shareholders and analysts in understanding our financial position as at and for the periods ended on the dates presented, as well as our strategic priorities and objectives, and may not be appropriate for other purposes. Material economic assumptions underlying the forward-looking statements contained in this document include those set out in the Economic Developments and Outlook section of BMO's 2023 Annual Report, as updated in the Economic Developments and Outlook section in our First Quarter 2024 Report to Shareholders, as well as in and the Allowance for Credit Losses section of BMO's 2023 Annual Report, as updated in the Allowance for Credit Losses section in our First Quarter 2024 Report to Shareholders. Assumptions about the performance of the Canadian and U.S. economies, as well as overall market conditions and their combined effect on our business, are material factors we consider when determining our strategic priorities, objectives and expectations for our business. In determining our expectations for economic growth, we primarily consider historical economic data, past relationships between economic and financial variables, changes in government policies, and the risks to the domestic and global economy. Other Disclaimers This document includes voluntary disclosures on customer growth and support, sustainable lending and underwriting targets, sustainable investment targets, operational GHG emissions and targets, climate related opportunities and risks, governance, strategy, risk management and metrics and targets that may not be, and are not required to be, incorporated into our mandatory disclosures, where we use a definition of materiality established under applicable securities laws for the purpose of complying with the disclosure rules and regulations promulgated by applicable securities regulators and applicable stock exchange listing standards. Any third-party information contained in this document or otherwise used to derive information in this document is believed to be reasonable and reliable, but no representation or warranty is made by as to the quality, completeness, accuracy, fitness for a particular purpose or non-infringement of such information. Specifically, the methodologies utilized to measure operational GHG emissions and financed emissions, set targets and track future progress against these targets use emissions information and estimates that have been derived from third-party sources, which Bank of Montreal believes to be reasonable. Further, in the absence of counter party specific emissions data, some financed emissions will be estimated using the best information available, including that provided by third-party sources. In no event shall Bank of Montreal be liable (whether in contract, tort, equity or otherwise) for any use by any party of, for any decision made or action taken by any party in reliance upon, or for any inaccuracies or errors in, or omissions from, such information contained herein. Certain third-party information, such as Scope 3 emissions and emissions factors, may change over time as methodologies evolve and are refined. These inherent weaknesses with current methodologies, and other factors could cause results to differ materially from those expressed in the estimates and beliefs made by third parties and by Bank of Montreal. While we are not aware of any misstatements regarding the industry, company or market data presented in this document, such data and estimates involve important uncertainties, risks, and assumptions and are subject to change based on various factors, including those discussed under the heading "Caution Regarding Forward-Looking Statements" above.. BMOM Investor Presentation ⚫ February 2024 2