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

SUNCORENERGY 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:

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.

EXHIBITINDEX

EXHIBIT99.1

News Release dated November 14, 2023, Suncor Energy increases quarterly dividend

Exhibit99.1

FORIMMEDIATE RELEASE

Suncor Energy increases quarterly dividend

All financial figures are in Canadian dollars.

Calgary,Alberta (November 14, 2023) – Suncor Energy’s (TSX: SU) (NYSE: SU) Board of Directors has approved a quarterly dividend of $0.545 per share on its common shares representing an increase of approximately 5% over the prior quarter dividend.

“The increase is supported by our improved operational performance and is consistent with our focus on growing free funds flow to support strong shareholder returns, which includes a sustainable and competitive dividend,” said Rich Kruger, Suncor President and Chief Executive Officer.

The dividend will be payable December 22, 2023 to shareholders of record at the close of business on December 1, 2023.

SuncorEnergy is Canada’s leading integrated energy company. Suncor’s operations 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 distributionnetworks (including Canada’s Electric Highway™, a coast-to-coast network of fast-charging electric vehicle stations). Suncoris developing petroleum resources while advancing the transition to a low-emissions future through investment in power and renewablefuels. Suncor also conducts energy trading activities focused principally on the marketing and trading of crude oil, natural gas, byproducts,refined products and power. Suncor has been recognized for its performance and transparent reporting on the Dow Jones SustainabilityNorth America Index, FTSE4Good Index and CDP. Suncor’s common shares (symbol: SU) are listed on the Toronto Stock Exchangeand the New York Stock Exchange.

For more information about Suncor, visit our website at suncor.com.

Media inquiries:

(833) 296-4570

[email protected]

Investor inquiries:

(800) 558-9071

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