6-K

FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a - 16 or 15d - 16 of

the Securities Exchange Act of 1934

SUNCOR ENERGY INC.

(Name of registrant)

150 – 6th Avenue S.W.

P.O. Box 2844

Calgary**, Alberta**

Canada**,T2P 3E3**

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

EXHIBIT INDEX

EXHIBIT 99.1

News Release dated July 25, 2023, Suncor Energy to release second quarter 2023 financial results

Exhibit 99.1

FOR IMMEDIATE RELEASE

Suncor Energy to release second quarter 2023 financial results

Calgary, Alberta (July 25, 2023) – Suncor (TSX: SU) (NYSE: SU) will release its second quarter financial results on August 14, 2023 before 8:00 p.m. MT (10:00 p.m. ET).

A webcast to review the second quarter will be held on August 15, 2023 at 7:30 a.m. MT (9:30 a.m. ET). Representing management will be Rich Kruger, President and Chief Executive Officer and Kris Smith, Chief Financial Officer. A question and answer period with analysts will follow brief remarks from management. Troy Little, Vice President, Investor Relations will host the call.

To listen to the webcast, please join here.

If you are an analyst and would like to participate in the Q&A period, please register here.

Suncor is Canada’s leading integrated energy company. Suncor’soperations include oil sands development, production and upgrading, offshore oil and gas production, petroleum refining in Canada andthe United States and the company’s Petro-Canada retail and wholesale distribution networks, including Canada’s ElectricHighway, a coast-to-coast network of fast-charging EV stations. Suncor is developing petroleum resources while advancing the transitionto a low-emissions future through investment in power, renewable fuels and hydrogen. Suncor also conducts energy trading activities focusedprincipally on the marketing and trading of crude oil, natural gas, byproducts, refined products and power. Suncor has been recognizedfor its performance and transparent reporting on the Dow Jones Sustainability index, FTSE4Good and CDP. Suncor’s common shares(symbol: SU) are listed on the Toronto and New York stock exchanges.

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For more information about Suncor, visit our web site at suncor.com or follow us on Twitter @Suncor

Media inquiries:

(833) 296-4570

media@suncor.com

Investor inquiries:

(800) 558-9071

invest@suncor.com