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.     )

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Filed by a Party other than the Registrant  x

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Preliminary Proxy Statement

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Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

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Definitive Proxy Statement

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Definitive Additional Materials

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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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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.

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