BLACK HILLS CORP SD

Phillip A. Casey, age 62, joined the Company as Senior Vice President and Chief Legal Officer on November 13, 2024. Prior to joining the company, he led the Indianapolis office of Calfee, Halter & Griswold from 2019 to November 2024 and co-chaired the firm's energy and utilities practice. Mr. Casey also served as Vice President of Administration and General Counsel for Prairie State Generating Company from 2015 to 2018 and Vice President and Deputy General Counsel-Regulatory for NiSource from 2009 to 2015.

Linden R. Evans, age 62, has been President and Chief Executive Officer since January 1, 2019, President and Chief Operating Officer from 2016 through 2018, and President and Chief Operating Officer - Utilities from 2004 through 2015. Mr. Evans served as the Vice President and General Manager of our former communication subsidiary in 2003 and 2004, and Associate Counsel from 2001 to 2003. Mr. Evans has 23 years of experience with the Company.

Marne M. Jones, age 51, has been Senior Vice President Utilities since June 15, 2023. She served as VP Electric Utilities from 2021 to 2023, Vice President Regulatory and Finance from 2018 to 2021, and Vice President Regulatory from 2016 to 2018. Ms. Jones has a total of 23 years of experience with the Company and has advanced through roles of increasing responsibility in finance, accounting, corporate services, regulatory, and utility operations.

Erik D. Keller, age 61, has been Senior Vice President and Chief Information Officer since July 27, 2020. Prior to joining the company, he was an Information Technology consultant to Ontic Inc., a global provider of parts and services for legacy aerospace platforms, from January 2020 to July 2020, and Chief Information Officer for BBA Aviation, a global aviation support and aftermarket services provider, from 2012 to January 2020. As previously disclosed, Mr. Keller announced that he will resign from the Company, effective February 28, 2025.

Kimberly F. Nooney, age 54, has been Senior Vice President and Chief Financial Officer since April 1, 2023. She served as Vice President – Treasurer from 2015 to 2023, and also served as the Corporate Controller from 2018 to 2022. Ms. Nooney has a total of 28 years of experience with the Company across numerous roles within accounting, internal audit, corporate development, accounting systems, treasury, and financial planning and analysis.

Sarah A. Wiltse, age 46, joined the Company as Senior Vice President and Chief Human Resources Officer on October 28, 2024. Prior to joining the company, she was Vice President of Human Resources for ACCO Brands, a publicly traded global consumer goods company, from 2021 to October 2024, Director and Vice President Human Resources for Compass Minerals from 2018 to 2021, and held various leadership roles at Union Pacific from 2004 to 2018.