SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of
the Securities Exchange Act of 1934 (Amendment No.     )

Filed by the Registrant x
Filed by a Party other than the Registrant o
Check the appropriate box:
o	Preliminary Proxy Statement
o	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
o	Definitive Proxy Statement
x	Definitive Additional Materials
o	Soliciting Material under §240.14a-12
CF INDUSTRIES HOLDINGS, INC.
(Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)
Payment of Filing Fee (Check the appropriate box):
x	No fee required.
o	Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
	(1)		Title of each class of securities to which transaction applies:
	(2)		Aggregate number of securities to which transaction applies:
	(3)		Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):
	(4)		Proposed maximum aggregate value of transaction:
	(5)		Total fee paid:
o	Fee paid previously with preliminary materials.
o	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
	(1)	Amount Previously Paid:
	(2)	Form, Schedule or Registration Statement No.:
	(3)	Filing Party:
	(4)	Date Filed:

Commencing on or about April 27, 2018, CF Industries Holdings, Inc. sent the following letter to certain stockholders:

April 27, 2018

Dear Stockholder:

We have previously sent to you proxy materials or a Notice of Internet Availability of Proxy Materials for the CF Industries Holdings, Inc. Annual Meeting of Stockholders to be held on May 10, 2018.

Your Board of Directors unanimously recommends that you vote FOR each of the director nominees in Proposal 1 and FOR Proposals 2, 3 and 4. Your vote is very important.  If you have not voted, please do so today.

Please help your company avoid the expense of further solicitation by voting TODAY by telephone, via the Internet, or by signing, dating and returning the enclosed proxy card in the envelope provided.

Very truly yours,

W. Anthony Will

President and Chief Executive Officer

YOUR VOTE IS IMPORTANT!

Remember, you can vote your shares by telephone or via the Internet.

Please follow the easy instructions on the enclosed proxy card.

If you have any questions or need assistance in voting
your shares, please call our proxy solicitor,

INNISFREE M&A INCORPORATED

TOLL-FREE, at 1-888-750-5834.

On April 27, 2018, CF Industries Holdings, Inc. sent the following email to certain employees:

	April 27, 2018
	REMINDER TO VOTE YOUR CF SHARES AT ANNUAL MEETING
	Dear Fellow CF Industries Employees:
	Because many of you are CF Industries shareholders, I wanted to remind you to vote your CF shares on the proposals that will be considered at the company’s Annual Meeting to be held on Thursday, May 10, 2018.
	Shareholders will vote on four proposals at the Annual Meeting. CF’s Board of Directors unanimously recommends that you vote “FOR” each of the items.
	If you are a CF shareholder and hold your shares through a bank or broker, such as Charles Schwab & Co., you should have already received a notice by email or by standard mail (or both) that contains important instructions for accessing the proxy materials and voting your shares. If you made a previous election to do so, you may have received a printed set of the proxy materials by standard mail, with a proxy card or voting instruction form to record your vote that you can return in the postage-paid envelope included with the printed materials.
	Your vote as a shareholder is important. Please vote promptly by following the instructions on the notice, proxy card, or voting instruction form that you received. Voting can be done via the Internet or telephone or, if you received a proxy card, by standard mail. If you have misplaced the information on how to vote or have any questions, please contact Martin Jarosick (mjarosick@cfindustries.com) or Casey Spoden (cspoden@cfindustries.com) in Investor Relations.
	Tony Will
	President and Chief Executive Officer