CLEVELAND-CLIFFS INC. • 200 PUBLIC SQUARE • SUITE 3300 • CLEVELAND, OH 44114-2544 3 our financial statements as of and for the fourth quarter and year ended December 31, 2020, which may differ from our expectations and the preliminary estimated financial information provided in this release; severe financial hardship, bankruptcy, temporary or permanent shutdowns or operational challenges, due to the ongoing COVID-19 pandemic or otherwise, of one or more of our major customers, including customers in the automotive market, key suppliers or contractors, which, among other adverse effects, could lead to reduced demand for our products, increased difficulty collecting receivables, and customers and/or suppliers asserting force majeure or other reasons for not performing their contractual obligations to us; uncertainty and weaknesses in global economic conditions, including downward pressure on prices caused by the COVID-19 pandemic, oversupply of imported products, reduced market demand and risks related to U.S. government actions with respect to Section 232, the USMCA and/or other trade agreements, treaties or policies; uncertainties associated with the highly competitive and highly cyclical steel industry and reliance on the demand for steel from the automotive industry; continued volatility of steel and iron ore prices and other trends, which may impact the price-adjustment calculations under certain of our sales contracts; our ability to cost-effectively achieve planned production rates or levels, including at our HBI production plant; our ability to successfully identify and consummate any strategic investments or development projects; increased market share of lighter-weight steel alternatives, including aluminum; our ability to maintain adequate liquidity, our level of indebtedness and the availability of capital could limit cash flow available to fund working capital, planned capital expenditures, acquisitions, and other general corporate purposes or ongoing needs of our business; our actual economic iron ore reserves or reductions in current mineral estimates, including whether any mineralized material qualifies as a reserve; our ability to successfully diversify our product mix and add new customers; the outcome of any contractual disputes with our customers, joint venture partners or significant energy, material or service providers or any other litigation or arbitration; problems or uncertainties with sales volume or mix, productivity, transportation, environmental liabilities, employee-benefit costs and other risks of the steel and mining industries; impacts of existing and increasing governmental regulation and related costs and liabilities, including failure to receive or maintain required operating and environmental permits, approvals, modifications or other authorization of, or from, any governmental or regulatory entity and costs related to implementing improvements to ensure compliance with regulatory changes; our ability to maintain appropriate relations with unions and employees; the ability of our customers, joint venture partners and third-party service providers to meet their obligations to us on a timely basis or at all; events or circumstances that could impair or adversely impact the viability of a production plant or mine and the carrying value of associated assets, as well as any resulting impairment charges; uncertainties associated with natural disasters, weather conditions, unanticipated geological conditions, supply or price of energy, equipment failures, infectious disease outbreaks and other unexpected events; adverse changes in interest rates, foreign currency rates and tax laws; the potential existence of significant deficiencies or material weakness in our internal control over financial reporting; our ability to realize the anticipated benefits of the acquisitions of AK Steel and substantially all of the operations of ArcelorMittal USA and to successfully integrate the acquired businesses into our existing businesses, including uncertainties associated with maintaining relationships with customers, vendors and employees, as well as realizing additional future synergies; additional debt we assumed or issued in connection with the acquisitions of AK Steel and substantially all of the operations of ArcelorMittal USA, as well as additional debt we incurred in connection with enhancing our liquidity during the COVID-19 pandemic, may negatively impact our credit profile and limit our financial flexibility; changes in the cost of raw materials and supplies; supply chain disruptions or poor quality of raw materials or supplies, including scrap, coal, coke and alloys; disruptions in, or failures of, our information technology systems, including those related to cybersecurity; unanticipated costs associated with healthcare, pension and OPEB obligations; business and management strategies for the maintenance, expansion and growth of the combined company's operations; and our ability to retain and hire key personnel, including within the AK Steel and ArcelorMittal USA businesses.