DFAN14A

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.     )
Filed by the Registrant  o
Filed by a Party other than the Registrantx
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 Pursuant to §240.14a-12
CSX Corporation
(Name of Registrant as Specified In Its Charter)
The Children’s Investment Fund Management (UK) LLP The Children’s Investment Fund Management (Cayman) Ltd. The Children’s Investment Master Fund 3G Capital Partners Ltd. 3G Capital Partners, L.P. 3G Fund L.P. Christopher Hohn Alexandre Behring Gilbert H. Lamphere Timothy T. O’Toole Gary L. Wilson
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)
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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:
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On May 9, 2008, The Children’s Investment Fund Management (UK) LLP, The Children’s Investment Fund Management (Cayman) Ltd., The Children’s Investment Master Fund, 3G Capital Partners Ltd., 3G Capital Partners, L.P., 3G Fund L.P., Christopher Hohn, Alexandre Behring, Gilbert H. Lamphere, Timothy T. O’Toole and Gary Wilson (collectively, the “Participants”) posted various materials on http://www.strongercsx.com and distributed such materials electronically. Copies of those materials, current as of  May 9, 2008, are filed herewith as Exhibit 99.1.

EX-99.1

Exhibit 99.1

Dear StrongerCSX Subscriber:

We would like to bring to your attention some important information that has been added to the StrongerCSX website over the past week.

·On May 5, 2008, The Children’s Investment Fund (TCI) and 3G Capital (3G) announced the mailing of their definitive proxy statement and a letter to CSX shareholders explaining their rationale for seeking change at the Board level and outlining the qualifications of their five nominees.

·On April 30, 2008, TCI and 3G issued “CSX: The Case for Change,” a comprehensive white paper that addresses critical questions regarding CSX’s corporate governance and operational performance.

·The “What Others Are Saying” section of the website has been updated with quotes from John G. Larkin of Stifel Nicolaus and Rick Paterson of  UBS:

·“While we do not dispute that the potential for operational improvement is enormous, management’s current guidance does not give us much confidence that it will make significant headway in this area over the 2008-2010 forecast period.” — John G. Larkin , Stifel Nicolaus (May 6, 2008)

·“We attempt to demonstrate the likely drivers of management’s existing earnings guidance, and conclude that the guidance is achievable without any productivity gains.” — John G. Larkin, Stifel Nicolaus (May 6, 2008)

·“We think TCI’s “no railroad experience” argument has strongly resonated with investors.”  —  Rick Paterson, UBS (May 2, 2008)

·All materials related to TCI and 3G’s solicitation of proxies to elect a slate of five nominees to CSX’s twelve-member Board have been filed with the SEC and posted to the “SEC Filings” section of www.strongercsx.com.

Please check back regularly for updates.  We appreciate your continued interest in and support of a STRONGER CSX!

Best regards,
Snehal Amin

THIS ELECTRONIC MESSAGE IS FOR GENERAL INFORMATIONAL PURPOSES ONLY. IT DOES NOT HAVE REGARD TO THE SPECIFIC INVESTMENT OBJECTIVE, FINANCIAL SITUATION, SUITABILITY, OR THE PARTICULAR NEED OF ANY SPECIFIC PERSON WHO MAY RECEIVE THIS ELECTRONIC MESSAGE, AND SHOULD NOT BE TAKEN AS ADVICE ON THE MERITS OF ANY INVESTMENT DECISION. THE VIEWS EXPRESSED HEREIN REPRESENT THE OPINIONS OF THE CHILDREN’S INVESTMENT FUND MANAGEMENT (UK) LLP, THE CHILDREN’S INVESTMENT FUND MANAGEMENT (CAYMAN) LTD., THE CHILDREN’S INVESTMENT MASTER FUND, 3G CAPITAL PARTNERS LTD., 3G

CAPITAL PARTNERS, L.P., 3G FUND L.P., CHRISTOPHER HOHN, ALEXANDRE BEHRING, GILBERT LAMPHERE, TIMOTHY O’TOOLE AND GARY WILSON (COLLECTIVELY, THE “PARTICIPANTS”), AND ARE BASED ON PUBLICLY AVAILABLE INFORMATION WITH RESPECT TO CSX CORPORATION.

EXCEPT FOR THE HISTORICAL INFORMATION CONTAINED HEREIN, THE MATTERS ADDRESSED IN THIS ELECTRONIC MESSAGE ARE FORWARD-LOOKING STATEMENTS THAT INVOLVE CERTAIN RISKS AND UNCERTAINTIES. YOU SHOULD BE AWARE THAT ACTUAL RESULTS COULD DIFFERMATERIALLY FROM THOSE CONTAINED IN THE FORWARD-LOOKING STATEMENTS. THE PARTICIPANTS ASSUME NO OBLIGATION TO UPDATE THE FORWARD-LOOKING INFORMATION.

THE PARTICIPANTS RESERVE THE RIGHT TO CHANGE ANY OF THEIR OPINIONS EXPRESSED HEREIN AT ANY TIME AS THEY DEEM APPROPRIATE. THE PARTICIPANTS DISCLAIM ANY OBLIGATION TO UPDATE THE INFORMATION CONTAINED HEREIN.

THIS ELECTRONIC MESSAGE DOES NOT RECOMMEND THE PURCHASE OR SALE OF ANY SECURITY. THE PARTICIPANTS INCLUDE FUNDS AND ACCOUNTS THAT ARE IN THE BUSINESS OF TRADING – BUYING AND SELLING - PUBLIC SECURITIES. IT IS POSSIBLE THAT THERE WILL BE DEVELOPMENTS IN THE FUTURE THAT CAUSE ONE OR MORE OF THE PARTICIPANTS FROM TIME TO TIME TO SELL ALL OR A PORTION OF THEIR SHARES IN OPEN MARKET TRANSACTIONS OR OTHERWISE (INCLUDING VIA SHORT SALES), BUY ADDITIONAL SHARES (IN OPEN MARKET OR PRIVATELY NEGOTIATED TRANSACTIONS OR OTHERWISE), OR TRADE IN OPTIONS, PUTS, CALLS OR OTHER DERIVATIVE INSTRUMENTS RELATING TO SUCH SHARES.

ALL CSX STOCKHOLDERS ARE ADVISED TO READ THE DEFINITIVE PROXY STATEMENT AND OTHER DOCUMENTS RELATED TO THE SOLICITATION OF PROXIES BY THE PARTICIPANTS FROM THE STOCKHOLDERS OF THE ISSUER FOR USE AT THE 2008 ANNUAL MEETING OF STOCKHOLDERS OF THE ISSUER BECAUSE THEY CONTAIN IMPORTANT INFORMATION. THE DEFINITIVE PROXY STATEMENT AND FORM OF PROXY WILL BE MAILED TO STOCKHOLDERS OF THE ISSUER AND ARE, ALONG WITH OTHER RELEVANT DOCUMENTS, AVAILABLE AT NO CHARGE ON THE SEC’S WEB SITE AT HTTP://WWW.SEC.GOV. IN ADDITION, THE PARTICIPANTS IN THE PROXY SOLICITATION WILL PROVIDE COPIES OF THE DEFINITIVE PROXY STATEMENT WITHOUT CHARGE UPON REQUEST. INFORMATION RELATING TO THE PARTICIPANTS IS CONTAINED IN THE DEFINITIVE SCHEDULE 14A FILED BY THE PARTICIPANTS WITH THE SEC ON APRIL 28, 2008.