On July 8, 2022, Margaret M. Montemayor, Pioneer Natural Resources Company's (the “Company”) Vice President and Chief Accounting Officer, notified the Company she will be departing the Company effective July 14, 2022. Effective immediately, Christopher L. Washburn, age 39, will serve as the Company's interim Chief Accounting Officer while the Company determines Ms. Montemayor's successor. Mr. Washburn has served in various accounting positions with the Company for the past 16 years and most recently served as the Company's Controller since March 2018.