Age : 63 Director Since: 2015 Independent: Yes Committee Membership: Audit Compensation NESG Meeting Attendance: 100% Other Current Public Directorships: Denison Mine Corp. Mr. Hartwick served from 2019 until his retirement in 2024 as a Director, President and CEO for Ontario Power Generation Inc. ( OPG ), a provincial owner of power generation in Ontario, Canada and the United States. Mr. Hartwick provided transition support to OPG through October 2025. Previously, Mr. Hartwick served as Senior Vice President of Finance, Strategy, Risk & Chief Financial Officer for OPG from 2016 to 2019. From 2015 to 2016, Mr. Hartwick served as the Chief Financial Officer of Wellspring Financial Corporation, a Canadian sales financing company. Prior to joining Wellspring Financial Corporation, Mr. Hartwick served for ten years as Director, President and Chief Executive Officer of Just Energy Group Inc., an integrated retailer of commodity products. At Just Energy Group, Inc., his role included putting in place a broad set of financing arrangements for growth in North America and the United Kingdom and the expansion of the sales organization across these locations. Prior to that, Mr. Hartwick held a variety of senior executive roles, gaining an extensive financial background in the energy, consumer products and capital markets areas, including the positions of Chief Executive Officer and Chief Financial Officer at Just Energy Group, Inc., Chief Financial Officer at Hydro One, Inc. and a partner at Ernst & Young LLP. In each of these roles, Mr. Hartwick participated in the expansion and growth of the businesses and the establishment of financial platforms to support that growth. In November 2025, Mr. Harwick was appointed as a member and Chair of Canada s Independent Electricity System Operator s (IESO) Board. Mr. Hartwick was also appointed to serve as a Director for Canadian Nuclear Laboratories Board of Directors in October 2025 and for Denison Mines Corp. s Board of Directors in March 2025. Mr. Harwick previously served on the Board for Elexicon Energy, a regional electrical utility in Canada, from August 2025 through November 2025. Mr. Hartwick also served on the Board of Directors of Via Renewables, Inc., a retail energy services company from 2014 to 2024. From 2004 to 2016, Mr. Hartwick served on the Board of Directors of Atlantic Power Corporation, a publicly-traded power generation company in the United States and Canada. From 2014 through 2016, Mr. Hartwick served on the Board of Governors for Trent University, his alma mater. Mr. Hartwick is also a Board Member of Humber River Hospital and Investment Management Company of Ontario. Mr. Hartwick earned his Honors of Business Administration Degree from Trent University, Peterborough, Ontario and is a Certified Public Accountant. Qualifications, Experience, Key Attributes and Skills: Mr. Hartwick s experience in senior executive positions, including the roles of chief executive officer and chief financial officer, brings leadership, risk management, and strategic planning experience to the Board and Audit Committee. Mr. Hartwick s in-depth knowledge of financing initiatives as a senior executive in North American markets provides the Board with proficiencies to support business development, growth strategies and expenditure plans. Mr. Hartwick s experience as a director of other publicly-traded companies enables him to provide insights into a variety of strategic planning, risk management, compensation, finance and governance practices. The culmination of Mr. Hartwick s leadership in the energy industry and financial sector make him a valued advisor and highly qualified to serve as Board Chair and as a member of our Audit Committee.