Sec Form 4 Filing - Mantle Ridge LP @ CSX CORP - 2019-10-17

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Mantle Ridge LP 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) _____ Other (specify below) (Last) (First) (Middle) 712 FIFTH AVENUE, SUITE 17F 3. Date of Earliest Transaction (MM/DD/YY) 10/17/2019 (Street) NEW YORK, NY10019 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 10/17/2019 S( 1 ) 3,453,894 D $ 67.91 34,595,158 I See footnotes ( 2 ) ( 3 ) ( 4 ) ( 5 ) Common Stock 10/17/2019 J( 6 ) 34,490,589 D 3,476,148 I See footnotes ( 2 ) ( 3 ) ( 4 ) ( 5 ) Common Stock 10/17/2019 G( 7 ) 36,813 D 3,439,335 I See footnote ( 7 ) Common Stock 8,263 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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 Cash-Settled Equity Swaps ( 8 ) ( 8 ) 10/17/2019 J/K 11 ( 8 ) ( 8 ) ( 8 ) Common Stock 639,439 ( 8 ) 0 I See footnotes ( 2 ) ( 3 ) ( 4 ) ( 5 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Mantle Ridge LP 712 FIFTH AVENUE SUITE 17F NEW YORK, NY10019 X MR Argent Advisor LLC 712 FIFTH AVENUE SUITE 17F NEW YORK, NY10019 X MR Argent GP LLC 712 FIFTH AVENUE SUITE 17F NEW YORK, NY10019 X Hilal Paul C 712 FIFTH AVENUE SUITE 17F NEW YORK, NY10019 X Signatures MANTLE RIDGE LP, By: Mantle Ridge GP LLC, its managing member, By: PCH MR Advisor Holdings LLC, its managing member, By: /s/ Paul C. Hilal Paul C. Hilal, Sole Member 10/21/2019 Signature of Reporting Person Date MR ARGENT ADVISOR LLC, By: Mantle Ridge LP, its sole member, By: Mantle Ridge GP LLC, its managing member, By: PCH MR Advisor Holdings LLC, its managing member, By: /s/ Paul C. Hilal, Paul C. Hilal, Sole Member 10/21/2019 Signature of Reporting Person Date MR ARGENT GP LLC, By: MR GP HoldCo LLC, its managing member, By: MR GP HoldCo MM LLC, its managing member, By: PCH MR GP Holdings LLC, its managing member, By: /s/ Paul C. Hilal, Paul C. Hilal, Sole Member 10/21/2019 Signature of Reporting Person Date /s/ Paul C. Hilal, Paul C. Hilal 10/21/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The Reporting Persons (as defined below) sold the shares reported as sold in this Form 4 in order to repay Mantle Ridge Fund obligations under a secured credit facility. The Reporting Persons have no current plans to sell any additional shares of the Issuer, although they reserve the right to do so in their discretion. Paul C. Hilal continues to serve as a director and as Vice Chairman of the Board of the Issuer. ( 2 )In addition to Mantle Ridge LP, a Delaware limited partnership ("Mantle Ridge"), this Form 4 is being filed jointly by MR Argent Advisor LLC, a Delaware limited liability company ("MR Argent"), MR Argent GP LLC, a Delaware limited liability company ("Fund GP"), and Paul C. Hilal, a citizen of the United States of America (collectively, the "Reporting Persons"), each of whom has the same business address as Mantle Ridge and may be deemed to have a pecuniary interest in the securities reported on this Form 4 (the "Subject Securities"). ( 3 )MR Argent, a wholly owned subsidiary of Mantle Ridge, advises the accounts of MR Argent Fund CE LP, a Delaware limited partnership, and MR Argent Offshore Fund AB LP, MR Argent Offshore Fund BB LP, MR Argent Offshore Fund CB 01 LP, MR Argent Offshore Fund CB 02 LP, MR Argent Offshore Fund CB 03 LP, MR Argent Offshore Fund CB 04 LP, MR Argent Offshore CB 05 LP and MR Argent Offshore CB 07 LP, each a Cayman Islands exempted limited partnership, and, if applicable, their subsidiaries, which are Cayman Islands exempted companies (all such funds and their subsidiaries together, the "Mantle Ridge Funds"). ( 4 )MR Argent, as the investment adviser to the Mantle Ridge Funds, and Mantle Ridge, as the sole member of MR Argent, each may be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934. As the general partner of the Mantle Ridge Funds, Fund GP may be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a). By virtue of Paul C. Hilal's position as ultimately controlling MR Argent, Mantle Ridge and MR GP HoldCo LLC, the sole member of the Fund GP, Paul C. Hilal may be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a). Each of the Reporting Persons disclaims any beneficial ownership of any of the Subject Securities, except to the extent of any pecuniary interest therein. ( 5 )Paul C. Hilal is a member of the board of directors of the Issuer, and as a result, each of the Reporting Persons are directors by deputization for purposes of Section 16 of the Securities Exchange Act of 1934. ( 6 )The Reporting Persons effected a series of pro rata distributions to direct and indirect owners of the Mantle Ridge Funds. No consideration was paid in connection with these distributions. ( 7 )Reflects shares contributed by Mr. Hilal to certain charitable organizations. ( 8 )Reflects cash-settlement of total rate of return equity swaps referencing an aggregate of 639,439 shares of Common Stock. A payment of $511,027 was made to the Mantle Ridge Funds in connection therewith.

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).

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