United States Steel Corporation, incorporated in Delaware and listed under Commission File Number 1-16811, has filed its Specialized Disclosure Report (Form SD) with the United States Securities and Exchange Commission for the fiscal year ending December 31, 2023. The report, signed by Vice President, Controller & Chief Accounting Officer Manpreet S. Grewal, details the payments made by the company as a resource extraction issuer. The disclosure, required under Rule 13q-1 of the Securities Exchange Act, includes payments for harbor maintenance fees and federal income taxes to the United States federal government. The total payments made in 2023 amounted to $39,914,707, with harbor maintenance fees totaling $1,314,707 across various North American Flat-Rolled segments and federal income taxes amounting to $38,600,000 at the corporate level. The detailed payment information is presented in Exhibit 99.1 of the report.

United States Steel Corporation, incorporated in Delaware and listed under Commission File Number 1-16811, has filed its Specialized Disclosure Report (Form SD) with the United States Securities and Exchange Commission for the fiscal year ending December 31, 2023. The report, signed by Vice President, Controller & Chief Accounting Officer Manpreet S. Grewal, details the payments made by the company as a resource extraction issuer. The disclosure, required under Rule 13q-1 of the Securities Exchange Act, includes payments for harbor maintenance fees and federal income taxes to the United States federal government. The total payments made in 2023 amounted to $39,914,707, with harbor maintenance fees totaling $1,314,707 across various North American Flat-Rolled segments and federal income taxes amounting to $38,600,000 at the corporate level. The detailed payment information is presented in Exhibit 99.1 of the report.