U. S. STEEL MAKES STRATEGIC PROGRESS ON INDIANA PROJECTS BACKED BY NIPPON STEEL PARTNERSHIP

U. S. STEEL MAKES STRATEGIC PROGRESS ON INDIANA PROJECTS BACKED BY NIPPON STEEL PARTNERSHIP

December 22, 2025

PITTSBURGH, DECEMBER 22, 2025 - At its final meeting of the year, U. S. Steel's Board of Directors approved the funding for the full $350 million Gary Works blast furnace reline project. Relining Blast Furnace #14 is critical maintenance needed to allow Gary Works to continue to meet customer commitments and ensures the long-term iron making capabilities and capacities at Gary Works. Blast Furnace #14, the largest of four at Gary Works, produces iron for high-strength steel used in everything from cars to buildings, using iron ore pellets from its Minnesota Ore facilities.

Major investments in upgrades at the hot strip mill, where steel slabs are converted to coils, and the steel shop, where iron is converted to steel, continue to advance. Those upgrades are expected to cost roughly $200 million. U. S. Steel is working with the Indiana Department of Environmental Management to secure necessary permits for those upgrades, submitting its air permit and stormwater construction plans in December. These projects and collection of investments, once operational, will enhance steelmaking capabilities, improve competitiveness, and increase capacity.

"Each milestone represents tangible progress on our mission to invest billions in the future of American steelmaking," said David B. Burritt, President and CEO of U. S. Steel. "These Gary Works projects will fuel American manufacturing and expand opportunities for Hoosiers. From the iron range to the finishing lines, these projects are the definition of investing in steel mined, melted and made in America."

These advancements build on strong momentum across U. S. Steel, supported by Nippon Steel's advanced technology and commitment to invest $11 billion by the end of 2028. Shared technical expertise is accelerating key upgrades and reinforcing capabilities that customers rely on nationwide.

About U. S. Steel

Founded in 1901, U. S. Steel delivers profitable and sustainable steel solutions. Propelled by its talented employees and an unwavering focus on safety, U. S. Steel serves the automotive, construction, appliance, energy, containers, and packaging industries with high value-added steel products. Steel production begins with our competitively advantaged iron ore production capabilities which fuel our integrated steelmaking facilities and investments in electric arc furnaces. To help our customers create the best products with the fewest emissions, we are committed to reaching net-zero greenhouse gas emissions by 2050. U. S. Steel is at the forefront of creating steels that are stronger, lighter, and better for the environment. This includes our proprietary XG3® advanced high-strength steel, verdeX® steel produced with 70-80% lower CO2 emissions with a recycled content of up to 90%, and ultra-thin lightweight InduX™ steel for electric vehicles, generators, and transformers. U. S. Steel maintains operations across the United States and in Central Europe and is headquartered in Pittsburgh, Pennsylvania. For more information, please visit www.ussteel.com and follow U. S. Steel on LinkedIn, Instagram, Facebook, and X.