Management Change/Compensation Form 8 K

ITEM 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

The Company's Board of Directors ("the Board") appointed Harry M. (Red) Conger IV to serve as an independent director, effective June 28, 2024. Mr. Conger will also serve on the Safety and Sustainability Committee of the Board.

Mr. Conger, age 68, has extensive executive and operational mining experience. Mr. Congerretired from Teck Resources where he was President and Chief Operating Officer and a Director on the Board from September 2022 to October 2023, having previously joined Teck in September 2020 as Executive Vice President and Chief Operating Officer. Prior to joining Teck, he held the role of President and Chief Operating Officer of Americas at Freeport-McMoRan Inc., where he oversaw the management copper mining operations in North and South America. Mr. Conger's deep mining experience also included multiple executive roles at Phelps Dodge and operational roles at Kennecott Copper Corporation. Mr. Conger also previously served as Chair of the National Mining Association and has received numerous acknowledgements for his contributions to the field of mining, including, election to the National Academy of Engineering and induction to the Southwest Mining Hall of Fame. Mr. Conger also previously served as Chair of the New Mexico Association of Commerce and Industry, Commissioner of the New Mexico Mining Commission and Director of the Arizona Mining Association. Mr. Conger holds a Bachelor of Science degree in mining engineering from Colorado School of Mines with Postgraduate executive management studies at Duke University Fuqua School of Business, and Whitmore School of Business and Economics at the University of New Hampshire.

In connection with Mr. Conger's appointment to the Board, Mr. Conger will receive compensation as a non-employee director in accordance with the Company's director compensation program as described in its 2024 Proxy Statement, dated March 11, 2024. There are no arrangements or understandings between Mr. Conger and any other person in connection with his appointment as a director of the Company. Mr. Conger is not related to any officer or director of the Company, and there are no transactions or relationships between Mr. Conger and the Company and its subsidiaries that are reportable under Item 404(a) of Regulation S-K.