the incorporation by reference and use of the technical report summary titled “Technical Report Summary of Mineral Reserves and Mineral Resources for Morenci Mine” (the “Technical Report Summary”), with an effective date of December 31, 2023, that was prepared in accordance with Subpart 1300 of Regulation S-K promulgated by the Securities and Exchange Commission (SEC), as an exhibit to and referenced in the Form S-3;

the use of and references to my name, including my status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the SEC), in connection with the Form S-3 and any such Technical Report Summary; and

any extracts from or a summary of the Technical Report Summary included or incorporated by reference in the Form S-3 and the use of information derived, summarized, quoted or referenced from the Technical Report Summary, or portions thereof, that was prepared by me, that I supervised the preparation of and/or that was reviewed and approved by me, that is included or incorporated by reference in the Form S-3.

Sections 2 through 5, 11.2 through 13.1, 13.1.3 through 13.3, 15 through 26, and corresponding sections of the Executive Summary.

/s/ James Young

the incorporation by reference and use of the technical report summary titled “Technical Report Summary of Mineral Reserves and Mineral Resources for Morenci Mine” (the “Technical Report Summary”), with an effective date of December 31, 2023, that was prepared in accordance with Subpart 1300 of Regulation S-K promulgated by the Securities and Exchange Commission (SEC), as an exhibit to and referenced in the Form S-3;

the use of and references to my name, including my status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the SEC), in connection with the Form S-3 and any such Technical Report Summary; and

any extracts from or a summary of the Technical Report Summary included or incorporated by reference in the Form S-3 and the use of information derived, summarized, quoted or referenced from the Technical Report Summary, or portions thereof, that was prepared by me, that I supervised the preparation of and/or that was reviewed and approved by me, that is included or incorporated by reference in the Form S-3.

Sections 2, 6 through 7.5, 7.8, 8, 9, 11.1, 21 through 26, and corresponding sections of the Executive Summary.

/s/ Paul Albers

the incorporation by reference and use of the technical report summary titled “Technical Report Summary of Mineral Reserves and Mineral Resources for Morenci Mine” (the “Technical Report Summary”), with an effective date of December 31, 2023, that was prepared in accordance with Subpart 1300 of Regulation S-K promulgated by the Securities and Exchange Commission (SEC), as an exhibit to and referenced in the Form S-3;

the use of and references to my name, including my status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the SEC), in connection with the Form S-3 and any such Technical Report Summary; and

any extracts from or a summary of the Technical Report Summary included or incorporated by reference in the Form S-3 and the use of information derived, summarized, quoted or referenced from the Technical Report Summary, or portions thereof, that was prepared by me, that I supervised the preparation of and/or that was reviewed and approved by me, that is included or incorporated by reference in the Form S-3.

Sections 2, 7.6 through 7.8, 13.1.1, 13.1.2, 21 through 26, and corresponding sections of the Executive Summary.

/s/ Luis Tejada

the incorporation by reference and use of the technical report summary titled “Technical Report Summary of Mineral Reserves and Mineral Resources for Morenci Mine” (the “Technical Report Summary”), with an effective date of December 31, 2023, that was prepared in accordance with Subpart 1300 of Regulation S-K promulgated by the Securities and Exchange Commission (SEC), as an exhibit to and referenced in the Form S-3;

the use of and references to my name, including my status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the SEC), in connection with the Form S-3 and any such Technical Report Summary; and

any extracts from or a summary of the Technical Report Summary included or incorporated by reference in the Form S-3 and the use of information derived, summarized, quoted or referenced from the Technical Report Summary, or portions thereof, that was prepared by me, that I supervised the preparation of and/or that was reviewed and approved by me, that is included or incorporated by reference in the Form S-3.

Sections 2, 10, 12, 14, 15, 18, 21 through 26, and corresponding sections of the Executive Summary.

/s/ Jacklyn Steeples

the incorporation by reference and use of the technical report summary titled “Technical Report Summary of Mineral Reserves and Mineral Resources for Morenci Mine” (the “Technical Report Summary”), with an effective date of December 31, 2023, that was prepared in accordance with Subpart 1300 of Regulation S-K promulgated by the Securities and Exchange Commission (SEC), as an exhibit to and referenced in the Form S-3;

the use of and references to my name, including my status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the SEC), in connection with the Form S-3 and any such Technical Report Summary; and

any extracts from or a summary of the Technical Report Summary included or incorporated by reference in the Form S-3 and the use of information derived, summarized, quoted or referenced from the Technical Report Summary, or portions thereof, that was prepared by me, that I supervised the preparation of and/or that was reviewed and approved by me, that is included or incorporated by reference in the Form S-3.

Sections 2, 10, 12, 14, 15, 18, 21 through 26, and corresponding sections of the Executive Summary.

/s/ Leonard Hill