United States Steel Corporation Investor Presentation — January 2021

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www.ussteel.comJanuary 28, 20212Forward -looking statements

These slides are being provided to assist readers in understanding the results of operations, financial condition and cash fl owsof United States Steel Corporation as of and for the

fourth quarter and full year of 2020. Financial results as of and for the periods ended December 31, 2020 provided herein ar e preliminary unaudited results based on current

information available to management. They should be read in conjunction with the consolidated financial statements and Notes tothe Consolidated Financial Statements

contained in our Annual Report on Form 10 -K and Quarterly Reports on Form 10 -Q filed with the Securities and Exchange Commission .

This presentation contains information that may constitute “forward -looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section

21E of the Securities Exchange Act of 1934, as amended. We intend the forward -looking statements to be covered by the safe harbo r provisions for forward -looking statements in

those sections. Generally, we have identified such forward -looking statements by using the words “believe,” “expect,” “intend,” “estimate,” “anticipate,” “project,” “target,” “forecast,”

“aim,” “should,” “will,” “may” and similar expressions or by using future dates in connection with any discussion of, among o ther things, operating performance, trends, events or

developments that we expect or anticipate will occur in the future, statements relating to volume changes, share of sales and earnings per share changes, anticipated cost

savings, potential capital and operational cash improvements, anticipated disruptions to our operations and industry due to t he COVID -19 pandemic, changes in global supply and

demand conditions and prices for our products, international trade duties and other aspects of international trade policy, th e integration of Big River Steel in our existing business,

business strategies related to the combined business and statements expressing general views about future operating results. However, the absence of these words or similar

expressions does not mean that a statement is not forward -looking. Forward -looking statements are not historical facts, but inst ead represent only the Company’s beliefs

regarding future events, many of which, by their nature, are inherently uncertain and outside of the Company’s control. It is possible that the Company’s actual results and

financial condition may differ, possibly materially, from the anticipated results and financial condition indicated in these forward -looking statements. Management believes that

these forward -looking statements are reasonable as of the time made. However, caution should be taken not to place undue relianc e on any such forward -looking statements