SCHEDULE 13G/A 0000902664-24-006594 0001425851 XXXXXXXX LIVE 1 Common Stock, par value $1.00 per share 06/30/2025 0001163302 UNITED STATES STEEL CORP 912909108 600 GRANT ST ROOM 1500 PITTSBURGH PA 15219-2800 Rule 13d-1(b) Pentwater Capital Management LP DE 0.00 0.00 0.00 0.00 0.00 N 0 IA PN Matthew Halbower X1 0.00 0.00 0.00 0.00 0.00 N 0 HC IN UNITED STATES STEEL CORP 600 Grant Street, Pittsburgh, PA 15219 This statement is filed by: (i): Pentwater Capital Management LP (the "Investment Manager"), a Delaware limited partnership, and the investment adviser to certain funds (the "Pentwater Funds"), with respect to the shares of common stock, par value $1.00 per share ("Common Stock") of United States Steel Corp., a Delaware corporation (the "Company") that were directly held by the Pentwater Funds; and (ii) Mr. Matthew Halbower ("Mr. Halbower"), the sole shareholder of MCH PWCM Holdings Inc., the general partner of the Investment Manager, with respect to the shares of Common Stock that were directly held by the Pentwater Funds. The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons." The address of the business office of each of the Reporting Persons is 1001 10th Avenue South, Suite 216, Naples, FL 34102. The Investment Manager is a Delaware limited partnership. Mr. Halbower is a citizen of the United States. N IA HC The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference. 0% The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference. N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Pentwater Capital Management LP /s/ Matthew Halbower 08/14/2025 Matthew Halbower /s/ Matthew Halbower 08/14/2025