水獺尾电力 OTTR

Chuck MacFarlane is Chief Executive Officer of Otter Tail Corporation and has served in this role since April 2015. He guides corporate strategy, leveraging his wide-ranging management experience, insight into the corporation's culture and his deep understanding of our diversified business model. Prior to becoming Chief Executive Officer, Chuck served as President and Chief Operating Officer of the corporation from 2014 to 2015. From 2003 until 2014, Chuck led Otter Tail Corporation's electric utility, Otter Tail Power Company. Before joining Otter Tail Power in 2001, he worked for Xcel Energy. Chuck earned his bachelor's degree in electrical engineering from the University of North Dakota, and his master's degree in business administration from the University of St. Thomas. He also is a graduate of the University of Chicago - Booth Executive Program. Chuck serves on the Boards of Directors for Otter Tail Corporation, the University of North Dakota Alumni Association and Foundation, Edison Electric Institute and Lake Region Healthcare Corporation Board of Trustees.

John Abbott has served as Senior Vice President, Manufacturing Platform since February 11, 2015.

Jennifer Smestad has served as Senior Vice President, General Counsel and Corporate Secretary since April 13, 2025, and previously served as Vice President, General Counsel and Corporate Secretary of the Company from January 1, 2018 to April 12, 2025. Ms. Smestad has also served as General Counsel for OTP since March 1, 2013.

Mr. Thomas J. Webb, Advisor to a variety of companies, including Pacific Gas and Electric Company. Retired Executive Vice President and Chief Financial Officer of CMS Energy Corporation, primarily a gas and electric utility, from 2002 to 2017, and Vice Chair during 2017. Prior to his roles at CMS Energy Corporation, Mr. Webb served as Executive Vice President and Chief Financial Officer for The Kellogg Company, a multinational food manufacturer, from 1999 to 2002, and as Chief Financial Officer at Visteon Corporation, a division of Ford Motor Company, from 1996 to 1999. He began his career at Ford Motor Company in 1977, holding positions of increasing responsibility in finance and management for a period of more than 22 years in the United States and in Europe. Other Board Service: EnerBank USA (Chair) (2002-2018); Southwest Michigan First (Finance and Audit Committee Chair). Thomas J. Webb will not stand for re-election at the 2027 Annual Meeting of Shareholders.

Dr. Michael E. LeBeau, System Vice President for the health services division of Sanford Health, one of the largest health systems in the United States. As System Vice President, Dr. LeBeau is responsible for the oversight of the health services division of Sanford Health including the operations of the regions of Bemidji, Fargo, Bismarck, and Sioux Falls. In his role, Dr. LeBeau is also responsible for overseeing the Good Samaritan Society, the Virtual Hospital, as well as the management of Sanford Health's combined service lines of excellence. Prior to being promoted to System Vice President in 2021, Dr. LeBeau served as the President and CEO of Sanford Health Bismarck, overseeing the administration of health services and the planning and implementation of operational and strategic goals for the Bismarck Region. He held that role from 2019 to 2021. Before being named as President and CEO, Dr. LeBeau served as the Vice President of Clinics for Sanford Health Bismarck, a position he held from 2014 to 2019. In this role, he served as the senior physician executive responsible for the region's physicians and advanced practice providers. He also served as a Trustee on the Sanford Board of Trustees, the national governing body for Sanford Health. Other Board Service: Missouri Family Valley YMCA, Bismarck; University of North Dakota School of Medicine & Health Sciences; University of North Dakota Alumni Association and Foundation; Sanford Board of Trustees.

Dr. Kathryn O. Johnson, Senior Geochemist at Barr Engineering since 2021, where she serves as a project manager and consultant on a part-time basis, with a focus on environmental investigation, assessment, compliance and permitting. Prior to assuming her current role with Barr Engineering, Dr. Johnson owned and was the Principal of Johnson Environmental Concepts from 1990 through May 2021. In this role, she specialized in applying geochemistry to resource development in the mining industry and remediation of legacy contamination of soil and water. She is a principal in DTH, LLC, and other real estate development businesses in South Dakota and has served in these capacities since 1990. From 2017 to 2021, Dr. Johnson served on the Pennington County Planning Commission, which deals with land use issues of permitting, platting and zoning. In 2019 to 2021, she served on the South Dakota Board of Water and Natural Resources, which promotes water development projects, implements the state water plan and oversees financial assistance to communities for water and waste projects. Dr. Johnson holds a Ph.D. in Geology from the South Dakota School of Mines and Technology. Other Board Service: Goodwill of the Great Plains; South Dakota Board of Water and Natural Resources (2019-2021); South Dakota Board of Regents (2005-2017), President (2011); South Dakota Board of Minerals and Environment (1995-2005). Dr. Kathryn Johnson will not stand for re-election at the 2027 Annual Meeting of Shareholders.

Jeanne H. Crain, President and Chief Executive Officer of Bremer Financial Corporation (Bremer), a 16 billion financial services organization with locations in Minnesota, Wisconsin and North Dakota. She has served as Bremer's CEO since 2016. Prior to being appointed as President and CEO, Ms. Crain served as the Group President, Bremer Financial Corporation & CEO, Bremer Bank, Twin Cities and North Dakota Region. She has extensive banking experience, having been involved in the industry in roles of increasing responsibility for more than 40 years. Other Board Service: Federal Reserve Bank of Minneapolis (Chair, Audit Committee, 2020-2024); YMCA of the North (Vice Chair); Bremer Financial Corporation; Minnesota Business Partnership; Saint Paul Downtown Alliance.

Ms. Mary Ludford, Retired Chief Audit Executive and Deputy Chief Security Officer for Exelon Corporation, a Fortune 200 company, which serves 10 million customers through six regulated distribution and transmission utilities. Ms. Ludford retired in 2020, after having served as Deputy Chief Security Officer of Exelon from 2018-2020, and Vice President, Corporate Operations of Exelon from 2016-2018. Ms. Ludford served as the Chief Audit Executive at Exelon from 2010-2016. Other Board Service: NW Natural Holding Company (Member, Audit and Finance Committee).

Mr. John D. Erickson, Advisor to ECJV Holding, LLC, a subsidiary of Cascade Investments, LLC, since 2011. Former President and Chief Executive Officer of Otter Tail Corporation from 2002 to 2011. Having joined Otter Tail Power Company in 1980, Mr. Erickson was appointed to roles of increasing responsibility throughout his career spanning more than 30 years. Prior to his role as the President and Chief Executive Officer of Otter Tail Corporation, from 1998 to 2000, Mr. Erickson served as the Chief Financial Officer, Vice President of Finance and Treasurer. In 2000, Mr. Erickson was named as the Corporation's Executive Vice President, in addition to his ongoing responsibilities as Chief Financial Officer and Treasurer. Then, in 2001, Mr. Erickson was named as the Corporation's President, and its Chief Executive Officer in 2002. He served as Otter Tail Power Company's President from 2001 to 2002 and as its Director of Revenue and Market Analysis from 1989 to 1998. Other Board Service: North Dakota State University Foundation (Nominating and Governance Committee and Chair, Investment Committee); Lake Region Healthcare Corporation Board of Trustees (Vice Chair).

On April 13, 2026, the Board also elected Tyler Nelson as Vice President, Chief Financial Officer of the Company. Mr. Nelson, age 46, previously served as Vice President of Finance and Treasurer since 2024, and Vice President of Accounting from 2020 to 2024. In these roles, he was responsible for the Company's accounting and finance activities, including financial planning and budgeting, internal and external financial reporting, investor relations, income tax planning and compliance and corporate treasury functions. Mr. Nelson holds a Bachelor of Science degree in psychology from North Dakota State University and a Bachelor of Science degree in accounting from the University of Minnesota. He is a Certified Public Accountant. Before joining the Company, Mr. Nelson was the Corporate Controller for Titan Machinery in Fargo, North Dakota. He previously worked as an Audit Manager at Grant Thornton in Minneapolis, Minnesota.

On December 17, 2025, the Company's Board of Directors appointed Mr. Steve P. Rasche to serve as member of the Board of Directors, effective January 1, 2026.Mr. Rasche retired as Chief Financial Officer for Spire Inc. earlier this year. Steve brings extensive expertise in utility finance and risk management, said Partain. His vast leadership experience and pragmatic decision making will play a key role in driving our strategic objectives. Rasche graduated with his masters in business administration from Northwestern University and has a bachelor's degree in Accountancy from the University of Missouri. He is a member of the Board of Directors for the St. Louis Equity Fund, Inc.; the Energy Capital Ventures Advisory Board; Greater St. Louis Scouting; Greater St. Louis YMCA and the University of Missouri, Trulaske College of Business. Other Board Service: St. Louis Equity Fund, Inc. (Vice Chair, Audit Chair, and Executive & Governance Committee), Energy Capital Ventures Advisory Board, Greater St. Louis Scouting (Chair, Investment Committee), Greater St. Louis YMCA Executive Board Member (Chair, Finance Committee), University of Missouri, Trulaske College of Business (Graduate Programs Advisory Board).

On December 17, 2025, the Company's Board of Directors appointed Mr. Christopher B. Clark as member of the Board of Directors, effective January 1, 2026. Mr. Clark retired as President of Xcel Energy - Minnesota, North Dakota, and South Dakota in 2023. Chris offers extensive knowledge and proven leadership in the regulated energy industry, said Partain. His strategic foresight, regulatory insights and collaborative approach will be instrumental as we execute our corporate strategy. Clark earned his Juris Doctor from Drake University Law School and has a bachelor's degree from the University of Iowa. He has served as a member of the Board of Directors for the University of Minnesota Center for Transportation Studies and the Saint Paul Downtown Alliance. Other Board Service: University of Minnesota Center for Transportation Advisory Board Member (2019-2025), Saint Paul Downtown Alliance Board Member (2020-2025), Minnesota Department of Transportation Sustainable Transportation Advisory Council (Co-Chair) (2020-2023), People Saving People, Board Member (2014-2021) and Chair (2019).