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 6, 2023, Update on Suncor Energy response to cybersecurity incident

Exhibit 99.1

FOR IMMEDIATE RELEASE

Update on Suncor Energy response to cybersecurity incident

Calgary, Alberta--(July 6, 2023) - As previously announced on June 25, 2023, Suncor (TSX: SU) (NYSE: SU) experienced a cybersecurity incident. We immediately activated our business continuity plans, engaged leading IT and cybersecurity experts and notified relevant authorities. Based on our investigation to date, we determined that our IT network was accessed by an unauthorized party on or about June 21, 2023.

The incident has not impacted the safety and reliability of our field operations. However, our Petro-Canada business experienced temporary disruptions that have largely been resolved. Our focus throughout has been to protect our IT systems and minimize disruption to our customers and suppliers.

We have determined that our Petro-Points^TM^ program has been impacted. The unauthorized party obtained members' basic contact information. We are notifying Petro-Points members and the appropriate privacy regulators.

If we discover additional information was obtained, we will notify affected parties as appropriate.

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.;and the company's Petro-Canada retail and wholesale distribution networks (including Canada's Electric Highway™, a coast-to-coastnetwork of fast-charging electric vehicle stations). Suncor is developing petroleum resources while advancing the transition to a low-emissionsfuture through investment in power, renewable fuels and hydrogen. 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 index, FTSE4Good and CDP. Suncor's common shares (symbol: SU) are listed onthe 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