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 ENERGYINC.

(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:

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

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 October 31, 2023, Suncor Energy to release third quarter 2023 financial results

Exhibit 99.1

FOR IMMEDIATE RELEASE

Suncor Energy to release third quarter 2023 financial results

Calgary, Alberta (October 31, 2023) – Suncor (TSX: SU) (NYSE: SU) will release its third quarter financial results on November 8, 2023 before 8:00 p.m. MT (10:00 p.m. ET).

A webcast to review the third quarter will be held on November 9, 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 Energy is Canada's leading integrated energy company. Suncor’soperations include oil sands development, production and upgrading; offshore oil and gas; petroleum refining in Canada and the U.S.; andthe company’s Petro-Canada™ retail and wholesale distribution networks (including Canada’s Electric Highway™,a coast-to-coast network of fast-charging electric vehicle stations). Suncor is developing petroleum resources while advancing the transitionto a low-emissions future through investment in power and renewable fuels. Suncor also conducts energy trading activities focused principallyon the marketing and trading of crude oil, natural gas, byproducts, refined products and power. Suncor has been recognized for its performanceand transparent reporting on the Dow Jones Sustainability North America Index, FTSE4Good Index and CDP. Suncor’s common shares (symbol:SU) are listed on the Toronto Stock Exchange and the New York Stock Exchange.

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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