EX-32.1 8 a2202123zex-32_1.htm EX-32.1
QuickLinks -- Click here to rapidly navigate through this document


CF INDUSTRIES HOLDINGS, INC.

Exhibit 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

        In connection with the Annual Report on Form 10-K of CF Industries Holdings, Inc. (the Company) for the period ended December 31, 2010 as filed with the Securities and Exchange Commission on the date hereof (the Report), I, Stephen R. Wilson, as President and Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

            (1)   The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

            (2)   The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ STEPHEN R. WILSON

Stephen R. Wilson
President and Chief Executive Officer, Chairman of the Board (Principal Executive Officer)
   

Date:

 

February 25, 2011


 

 



QuickLinks