Form of Proxy

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: IAN R. ASHBY

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: PATRICIA M. BEDIENT

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: RUSSELL K. GIRLING

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: JEAN PAUL GLADU

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: RICHARD M. KRUGER

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: BRIAN P. MACDONALD

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: LORRAINE MITCHELMORE

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: JANE L. PEVERETT

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: DANIEL ROMASKO

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: CHRISTOPHER R. SEASONS

THE ELECTION OF THE FOLLOWING NOMINEE AS DIRECTOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS: M. JACQUELINE SHEPPARD

APPOINTMENT OF KPMG LLP AS AUDITOR OF SUNCOR ENERGY INC. UNTIL THE CLOSE OF THE NEXT ANNUAL MEETING OF SHAREHOLDERS

TO CONSIDER AND, IF DEEMED FIT, APPROVE AN ADVISORY RESOLUTION ON SUNCORS APPROACH TO EXECUTIVE COMPENSATION DISCLOSED IN THE MANAGEMENT PROXY CIRCULAR OF SUNCOR ENERGY INC. DATED FEBRUARY 26, 2025 (THE CIRCULAR)

TO CONSIDER A SHAREHOLDER PROPOSAL FOR SUNCOR TO COMMISSION AND ISSUE A REPORT TO ITEMIZE THE IMPACTS AND QUANTIFY THE COSTS OF ITS COMMITMENT TO ACHIEVE NET ZERO BY 2050, AS SET FORTH IN ON PAGE A-1 OF SCHEDULE A OF THE CIRCULAR