United States Steel : Expanding our iron ore competitive advantage

EXPANDING OUR IRON ORE COMPETITIVE ADVANTAGE

PROVIDING AN UPDATE ON

U. S. STEEL'S METALLICS STRATEGY

June 28, 2022

Legal disclaimers

These slides are being provided to assist readers in understanding U. S. Steel's metallics strategy.

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 harbor 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," "plan," "goal," "future," "will," "may" and similar expressions or by using future dates in connection with any discussion of, among other things, the construction or operation of new or existing facilities, 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, statements regarding our future strategies, products and innovations, changes in global supply and demand conditions and prices for our products, statements regarding our greenhouse gas emissions reduction goals 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 instead 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 reliance on any such forward-looking statements because such statements speak only as of the date when made. Our Company undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law. In addition, forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from our Company's historical experience and our present expectations or projections. These risks and uncertainties include, but are not limited to, the

risks and uncertainties described in "Item 1A. Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2021 and those

described from time to time in our future reports filed with the Securities and Exchange Commission.

References to "we," "us," "our," the "Company" and "U. S. Steel" refer to United States Steel Corporation and its consolidated subsidiaries unless otherwise indicated by the context and references to "Big River Steel" refer to Big River Steel Holdings LLC and its direct and indirect subsidiaries unless otherwise indicated by the context.

The investment in direct reduced-grade pellets and expected timeline described herein are subject to state and local support and receipt of regulatory permitting. The proposed transaction with SunCoke Energy ("SunCoke") described herein is contingent upon several conditions, including the negotiation and execution of a definitive agreement, approval by the Board of Directors of U. S. Steel, and receipt of all appropriate regulatory approvals. There can be no assurance as to the final terms of the proposed transaction, that the conditions will be satisfied, or that the proposed transaction will be completed.

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Continued progress towards Best for All®

THE	THE	A	THE PATH
CURRENT	CHALLENGES
SOLUTION	FORWARD
LANDSCAPE	WE FACE

Providing an update	Transitioning to a less	Expanding our		Getting to our
on U. S. Steel's	capital and carbon	competitive advantages:	Best for All
metallics strategy	intensive business	✓	Low-cost		future faster
	model while	Today's
Translating our low-	becoming the best		iron ore
	focus
cost iron ore advantage	steel competitor
✓ Mini mill
to our growing fleet of
		steelmaking
electric arc furnaces
(EAFs)		✓ Best-in-class

finishing capabilities

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Continued progress towards Best for All

Expanding our iron ore competitive advantage

U. S. Steel's Competitive Advantages:

LOW-COST		MINI MILL		BEST-IN-CLASS
		FINISHING
IRON ORE		STEELMAKING
		CAPABILITIES

Expanding our iron ore competitive advantage to our growing fleet of EAFs

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Continued progress towards Best for All

Expanding our iron ore competitive advantage

Today's Updates:

DR-GRADE1 PELLETS AT

MINNESOTA ORE OPERATIONS

Investing in DR-grade pellet capability to produce feedstock for DRI/HBI2 production

Maintaining optionality while serving the growing EAF market

UPDATE

PROGRESS TOWARDS PIG IRON AT GRANITE CITY WORKS

Non-binding letter of intent with SunCoke to acquire

Granite City's blast furnaces

Repurposing blast furnaces for pig iron production, sourced with U. S. Steel iron ore pellets

Note: The investment in DR-grade pellets and expected timeline are subject to state and local support and receipt of regulatory permitting. Pig iron at Granite City Works	5
is subject to reaching a definitive agreement with SunCoke and other contingencies and approvals. See "Legal Disclaimers" slide. 1 DR-grade = Direct Reduced-grade

2 DRI/HBI = Direct Reduced Iron / Hot Briquetted Iron