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


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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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On May 5, 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. Copies of such materials, current as of May 5, 2008, are filed herewith as Exhibit 99.1.