CANADIAN NATURAL RESOURCES LTD

Foreign Filer Report • Mar 21, 2018

6-K 1 a2234768z6-k.htm 6-K QuickLinks -- Click here to rapidly navigate through this document

COMMAND=ADD_BASECOLOR,"#000000" COMMAND=ADD_DEFAULTFONT,"font-family:times;" COMMAND=ADD_TABLESHADECOLOR,"#CCEEFF" COMMAND=ADD_STABLERULES,"border-bottom:solid #000000 1.0pt;" COMMAND=ADD_DTABLERULES,"border-bottom:double #000000 2.25pt;" COMMAND=ADD_SCRTABLERULES,"border-bottom:solid #000000 1.0pt;margin-bottom:0pt;" COMMAND=ADD_DCRTABLERULES,"border-bottom:double #000000 2.25pt;margin-bottom:0pt;"

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

Dated: March 21, 2018

Commission File Number: 333-12138

CANADIAN NATURAL RESOURCES LIMITED (Exact name of registrant as specified in its charter)

2100, 855—2 ND Street S. W., Calgary, Alberta T2P 4J8 (Address of principal executive offices)

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): o

Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.

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): o

Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant's "home country"), or under the rules of the home country exchange on which the registrant's securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant's security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR.

BLANK LINE TO FORCE PARA

ZEQ.=1,SEQ=1,EFW="2234768",CP="CANADIAN NATURAL RESOURCES",DN="1",CHK=160306,FOLIO='blank',FILE='DISK131:[18ZAW4.18ZAW42504]BA42504A.;7',USER='CMACGOW',CD='21-MAR-2018;14:46' THIS IS THE END OF A COMPOSITION COMPONENT

COMMAND=ADD_BASECOLOR,"#000000" COMMAND=ADD_DEFAULTFONT,"font-family:times;" COMMAND=ADD_TABLESHADECOLOR,"#CCEEFF" COMMAND=ADD_STABLERULES,"border-bottom:solid #000000 1.0pt;" COMMAND=ADD_DTABLERULES,"border-bottom:double #000000 2.25pt;" COMMAND=ADD_SCRTABLERULES,"border-bottom:solid #000000 1.0pt;margin-bottom:0pt;" COMMAND=ADD_DCRTABLERULES,"border-bottom:double #000000 2.25pt;margin-bottom:0pt;"

COMMAND=ADD_TABLEWIDTH,"100%" User-specified TAGGED TABLE

Exhibit Number	Description
99.1	Canadian Natural Resources Limited Notice of Annual General Meeting and Management Information Circular to Shareholders dated March 14, 2018

end of user-specified TAGGED TABLE

ZEQ.=1,SEQ=2,EFW="2234768",CP="CANADIAN NATURAL RESOURCES",DN="1",CHK=487245,FOLIO='blank',FILE='DISK131:[18ZAW4.18ZAW42504]JA42504A.;8',USER='CMACGOW',CD='21-MAR-2018;14:46' THIS IS THE END OF A COMPOSITION COMPONENT

COMMAND=ADD_BASECOLOR,"#000000" COMMAND=ADD_DEFAULTFONT,"font-family:times;" COMMAND=ADD_TABLESHADECOLOR,"#CCEEFF" COMMAND=ADD_STABLERULES,"border-bottom:solid #000000 1.0pt;" COMMAND=ADD_DTABLERULES,"border-bottom:double #000000 2.25pt;" COMMAND=ADD_SCRTABLERULES,"border-bottom:solid #000000 1.0pt;margin-bottom:0pt;" COMMAND=ADD_DCRTABLERULES,"border-bottom:double #000000 2.25pt;margin-bottom:0pt;"

TOC_END

SIGNATURE

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.

COMMAND=ADD_TABLEWIDTH,"100%" User-specified TAGGED TABLE

Date: March 21, 2018	Canadian Natural Resources Limited (Registrant) — By:	/s/ PAUL M. MENDES Paul M. Mendes VP, Legal, General Counsel & Corporate Secretary

end of user-specified TAGGED TABLE

ZEQ.=1,SEQ=3,EFW="2234768",CP="CANADIAN NATURAL RESOURCES",DN="1",CHK=314673,FOLIO='blank',FILE='DISK131:[18ZAW4.18ZAW42504]JC42504A.;7',USER='CMACGOW',CD='21-MAR-2018;14:46' THIS IS THE END OF A COMPOSITION COMPONENT

COMMAND=ADD_BASECOLOR,"#000000" COMMAND=ADD_DEFAULTFONT,"font-family:times;" COMMAND=ADD_TABLESHADECOLOR,"#CCEEFF" COMMAND=ADD_STABLERULES,"border-bottom:solid #000000 1.0pt;" COMMAND=ADD_DTABLERULES,"border-bottom:double #000000 2.25pt;" COMMAND=ADD_SCRTABLERULES,"border-bottom:solid #000000 1.0pt;margin-bottom:0pt;" COMMAND=ADD_DCRTABLERULES,"border-bottom:double #000000 2.25pt;margin-bottom:0pt;"

TOC_END

SIGNATURE

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.

COMMAND=ADD_TABLEWIDTH,"100%" User-specified TAGGED TABLE

	Canadian Natural Resources Limited
	(Registrant)
Date: March 21, 2018	By:	/s/ PAUL M. MENDES Paul M. Mendes VP, Legal, General Counsel & Corporate Secretary

end of user-specified TAGGED TABLE

ZEQ.=1,SEQ=4,EFW="2234768",CP="CANADIAN NATURAL RESOURCES",DN="1",CHK=318858,FOLIO='blank',FILE='DISK131:[18ZAW4.18ZAW42504]JE42504A.;10',USER='CMACGOW',CD='21-MAR-2018;15:00' THIS IS THE END OF A COMPOSITION COMPONENT

QuickLinks

TOC_BEGIN SIGNATURE TOC_BEGIN SIGNATURE SEQ=,FILE='QUICKLINK',USER=SSTALKE,SEQ=,EFW="2234768",CP="CANADIAN NATURAL RESOURCES",DN="1" TOCEXISTFLAG