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

Suncor Energy declaresdividend

All financial figures are in Canadiandollars.

**Calgary, Alberta (May 5, 2026)**Suncor Energy’s (TSX: SU) (NYSE: SU) Board of Directors has approved a quarterly dividend of $0.60 per share on its common shares, payable June 25, 2026 to shareholders of record at the close of business on June 4, 2026.

Suncor Energy - Canada’sleading integrated energy company

Suncor’s operations span thefull energy value chain, including oil sands mining and in situ operations, upgrading, offshore production, petroleum refining in Canadaand the U.S., marketing and trading, and nationwide Petro-Canada™ retail and wholesale networks – delivering reliable energythat fuels economic growth and meets the needs of customers across Canada and globally. With an unwavering focus on safety, operationalexcellence, and profitability, Suncor is committed to delivering industry-leading performance and long-term shareholder value. Suncor’scommon shares (symbol: SU) are listed on the Toronto and New York stock exchanges.

For more information, visit suncor.com or find us on LinkedIn, Instagram and Facebook.

Media inquiries:

1-833-296-4570

media@suncor.com

Investor inquiries:

invest@suncor.com