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AMRIZE <br /> RECEIVED <br /> AUG 2 7 2025 <br /> August 13, 2025 <br /> Colorado Division of Reclamation, <br /> Colorado Department of Natural Resources Mining and Saftey <br /> Division of Reclamation,Mining and Safety <br /> 1313 Sherman St., Room 215 <br /> Denver, CO 80203 <br /> Subject: Holcim WCR Inc.-Corporate Rebranding and Name Change <br /> On January 28, 2024, Holcim Ltd (Holcim) announced its intent to separate and list its North American <br /> business with a full capital market separation (the "Spinoff') to create the leading pure-play building <br /> solutions company in the region. <br /> Final approval for the separation was provided by Holcim shareholders on May 14, 2025. The separation <br /> includes all of the assets and legal entities operating in the US and Canada and was effective as of June <br /> 23, 2025. The new North American business is branded as "Amrize". <br /> • <br /> In connection with the Spinoff, changes to certain legal entity names will take place. This letter is to <br /> inform you of the corporate name change for the following operation: Morrison Quarry (Permit# <br /> M1973021). <br /> As of June 23, 2025, the facility owner name changed: <br /> Previous Legal Entity Name New Legal Entity Name <br /> Holcim WCR Inc. Amrize West Central Inc. <br /> Enclosed are the required forms and legal documents necessary to facilitate this change. For further <br /> clarity, there will be no change to our Federal Employer Identification Number(FEIN)upon completion <br /> of the name change. <br /> If you have any questions or require additional information, please do not hesitate to contact Wyatt <br /> Webster at (702) 379-4623 or wyatt.webster@amrize.com. <br /> Respectfully, <br /> Kevin G. Bretz, PE <br /> Exec. Director, EHSS <br /> Amrize Building Envelope Division <br /> Amrize <br /> 8700 W Bryn Mawr,Chicago 60631 1/1 <br /> T 1 773 372 1000 www.amrize.com <br />