Investor Presentaiton

L Appendix 61 Strong Executive Team Robert C. Rowe • Chief Executive Officer Current position since 2008 Heather H. Grahame • General Counsel and Vice President of Regulatory • and Federal Government Affairs Current position since 2010 Brian B. Bird • President and . Chief Operating Officer Current position since 2021 (formerly Chief Financial Officer since 2003) Michael R. Cashell . • Vice President - Transmission Current Position since 2011 Curtis T. Pohl • • Vice President Distribution - Current position since 2003 John D. Hines • Vice President - Supply/Montana Affairs Current Position since 2011 • Bobbi L. Schroeppel Vice President - Customer Care, Communications and Human Resources • Current Position since 2002 Crystal D. Lail . • Vice President and Chief Financial Officer Current position since 2021 (formerly VP and Chief Accounting Officer since 2020) Jeanne M. Vold • Vice President - Technology • Current Position since 2021 (former Business Technology Officer since 2012) NorthWestern Energy Delivering a Bright Future

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