SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* HOHN CHRISTOPHER (Last) (First) (Middle) C/O THE CHILDREN'S INVESTMENT FUND MANAGEMENT (UK) LLP 7 CLIFFORD STREET (Street) LONDON X0 W1S 2WE (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol CSX CORP [ CSX ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) X Other (specify below) See Remarks
	3. Date of Earliest Transaction (Month/Day/Year) 04/22/2009
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $1.00 par value (Common Stock)	04/22/2009		S		6,542,259	D	$28.38(1)	4,295,690	I	See footnote(2)
Common Stock	04/22/2009		S		4,295,690	D	$29.52(3)	0	I	See footnote(2)
Common Stock								5,150(4)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* HOHN CHRISTOPHER (Last) (First) (Middle) C/O THE CHILDREN'S INVESTMENT FUND MANAGEMENT (UK) LLP 7 CLIFFORD STREET (Street) LONDON X0 W1S 2WE (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director 10% Owner Officer (give title below) X Other (specify below) See Remarks

1. Name and Address of Reporting Person* Childrens Investment Fund Management (UK) LLP (Last) (First) (Middle) 7 CLIFFORD STREET (Street) LONDON X0 W1S 2WE (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director 10% Owner Officer (give title below) X Other (specify below) See Remarks

1. Name and Address of Reporting Person* CHILDREN'S INVESTMENT FUND MANAGEMENT (CAYMAN) LTD. (Last) (First) (Middle) PO BOX 309GT UGLAND HOUSE SOUTH CHURCH STREET, GEORGE TOWN (Street) GRAND CAYMAN E9 BWI (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director 10% Owner Officer (give title below) X Other (specify below) See Remarks

1. Name and Address of Reporting Person* CHILDREN'S INVESTMENT MASTER FUND (Last) (First) (Middle) PO BOX 309GT UGLAND HOUSE SOUTH CHURCH STREET, GEORGE TOWN (Street) GRAND CAYMAN E9 BWI (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director 10% Owner Officer (give title below) X Other (specify below) See Remarks

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.00 to $29.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (3) of this Form 4.

2. The Children's Investment Fund Management (Cayman) Ltd., a Cayman Islands exempted company ("TCIF") and The Children's Investment Fund Management (UK) LLP, an English limited liability partnership ("TCIF UK") serve as management companies for The Children's Investment Master Fund, a Cayman Islands exempted company (the "TCI Fund"). Christopher Hohn is the managing partner of TCIF UK and the 100% owner of TCIF, and therefore is in a position to determine the investment and voting decisions made by the TCI Fund. The Reporting Persons disclaim beneficial ownership of any and all securities reported herein in excess of their respective pecuniary interest therein and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose. Mr. Hohn is a director of the Issuer.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.005 to $29.82, inclusive.

4. Shares of Common Stock previously reported as an exempt payment pursuant to Rule 16b-3 to Mr. Hohn of director's fees and/or annual retainer in the form of Common Stock of the Issuer pursuant to the CSX Corporation Stock Plan for Directors. Such shares of Common Stock are held directly by Mr. Hohn for the benefit of the TCI Fund.

Remarks:

TCIF UK, TCIF and the TCI Fund may be deemed to be directors by deputization by virtue of the fact that Mr. Hohn, the managing partner of TCIF UK and the 100% owner of TCIF, serves on the board of directors of the Issuer.

	/s/ Christopher Hohn	04/23/2009
	/s/ The Children's Investment Fund Management (UK) LLP, by Christopher Hohn, Managing Partner	04/23/2009
	/s/ The Children's Investment Fund Management (Cayman) Ltd., by David de Rosa, Director	04/23/2009
	/s/ The Children's Investment Master Fund, by David de Rosa, Director	04/23/2009
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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