6-K 1 a2218576z6-k.htm FORM 6-K
QuickLinks -- Click here to rapidly navigate through this document

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

For the month of: February, 2014 |  | Commission File Number: 1-12384

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:

Form 20-F |  | o |  | Form 40-F |  | ý

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.

|  | SUNCOR ENERGY INC.
Date: February 28, 2014 |  |  |  |
|  | By: |  | /s/ SHAWN POIRIER Shawn Poirier Assistant Corporate Secretary

EXHIBIT INDEX

Exhibit |  | Description of Exhibit
--- | --- | ---
| 99.1 |  | Notice of Meeting, Invitation to Shareholders and Management Proxy Circular, dated February 28, 2014
| 99.2 |  | Form of Proxy

QuickLinks

SIGNATURES
EXHIBIT INDEX