LUMA Opportunity Highlights

CANADIAN CU UTILITIES LIMITED An ATCO Company Transition Period Contract Year 1 Contract Year 2 Contract Year 3 Contract Year 4+ COMPENSATION ($US millions) Front-End Service Fee 60 LUMA Fixed Fee (Paid Monthly) Potential Incentive Fee 70 23 90 100 105 All compensation figures above are at the LUMA level. Canadian Utilities Limited holds a 50 per cent interest in LUMA. Fixed Fee and Incentive Fee are escalated annually at US CPI. INVESTOR PRESENTATION FEBRUARY 2021 32 13 17 19 20 ATCO CUTILITIES LIMITED CANADIAN An ATCO Company

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