Summit Materials, Inc. announced that Karli Anderson, formerly Executive Vice President, Chief ESG Officer and Head of Investor Relations, will assume the title of Executive Vice President, Chief People and ESG Officer and Head of Communications, expanding her role to lead the Company's human resources and communications functions. Ms. Anderson joined Summit Materials as Vice President of Investor Relations in 2019. In 2021, Ms. Anderson was promoted to Executive Vice President, Chief ESG Officer and Head of Investor Relations, which expanded her role at the Company to directly overseeing the development of the Company's ESG initiatives and commitments across the business, health and safety program and investor relations function.

Prior to joining Summit Materials, Ms. Anderson was Vice President of Investor Relations at Royal Gold, Inc. from 2013 to 2018. Since 2018, Ms. Anderson has been an independent director, chairman of the Compensation Committee, and member of the Audit Committee and Health and Safety Committee of Westwater Resources.