LUMA Opportunity Highlights

CANADIAN CU UTILITIES LIMITED An ATCO Company KEY CONTRACT TERMS & OBJECTIVES LUMA Operating and maintenance services contract that leverages CU's and Quanta's best-in-class capabilities to deliver significant benefits to the people of Puerto Rico ≫ ~One-year transition period underway - efficient and effective transition of operations from PREPA to LUMA - ≫ ~15-year operating period – LUMA assumes responsibility for all in-scope operational matters working with local workforce and management. ≫ System operating costs and capital expenditures are pass-through and paid from PREPA's pre-funded service accounts. ≫ Significant planned capital program to rebuild the T&D system post-hurricane Irma and Maria with funding through US federal disaster relief agencies – no required capital investment by LUMA. The PREPA retains ownership of all assets. - INVESTOR PRESENTATION FEBRUARY 2021 30 ATCO CUTILITIES LIMITED CANADIAN An ATCO Company

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