Document:

EX-4.3

 Exhibit 4.3 

FOURTH SUPPLEMENTAL INDENTURE 

(TO SECOND LIEN INDENTURE) 

FOURTH SUPPLEMENTAL INDENTURE (this “Third Supplemental Indenture”) dated as of March 20, 2014, among Road Raiders
Transportation, Inc., a Delaware corporation, Road Raiders Inland, Inc., a Delaware corporation, Road Raiders Technology, Inc., a Delaware corporation, and Road Raiders Logistics, Inc., a Delaware corporation (collectively, the “New
Guarantors”), each a subsidiary of HORIZON LINES, LLC (or its successor), a Delaware corporation (the “Issuer”), and U.S. BANK NATIONAL ASSOCIATION, a national banking association, as trustee under the indenture referred to below (the
“Trustee”). 
 W I T N E S S E T H : 

WHEREAS the Issuer (or its successor) has heretofore executed and delivered to the Trustee an indenture (as amended, supplemented or otherwise
modified, the “Indenture”) dated as of October 5, 2011, providing for the issuance of the Issuer’s Second Lien Senior Secured Notes due 2016 (the “Notes”), initially in an aggregate principal amount of $100,000,000;

 WHEREAS Section 4.18 of the Indenture provides that under certain circumstances the Issuer is required to cause the New Guarantors
to execute and deliver to the Trustee a supplemental indenture pursuant to which the New Guarantors shall unconditionally guarantee all the Issuer’s Obligations under the Notes and the Indenture pursuant to a Note Guarantee on the terms and
conditions set forth herein; and 
 WHEREAS pursuant to Section 11.01 of the Indenture, the Trustee, the Issuer and other existing
Guarantors, if any, are authorized to execute and deliver this Fourth Supplemental Indenture; 
 NOW THEREFORE, in consideration of the
foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the New Guarantors, the Issuer and the Trustee mutually covenant and agree for the equal and ratable benefit of the holders of the Notes as
follows: 
 1. Defined Terms. As used in this Fourth Supplemental Indenture, terms defined in the Indenture or in the preamble or recital
hereto are used herein as therein defined, except that the term “holders” in this Fourth Supplemental Indenture shall refer to the term “holders” as defined in the Indenture and the Trustee acting on behalf of and for the benefit
of such holders. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Fourth Supplemental Indenture refer to this Fourth Supplemental Indenture as a whole and not to any particular
section hereof. 
 2. Agreement to Guarantee. The New Guarantors hereby agree, jointly and severally with each other and all existing
guarantors (if any), to unconditionally guarantee the Issuer’s Obligations under the Notes and the Indenture on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions
of the Indenture and the Notes and to perform all of the obligations and agreements of guarantors under the Indenture. 

 3. Notices. All notices or other communications to the New Guarantors shall be given as provided
in Section 17.03 of the Indenture. 
 4. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly
amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Fourth Supplemental Indenture shall form a part of the Indenture for all
purposes, and every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. 
 5. Governing Law. THIS
FOURTH SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW. 

6. Trustee Makes No Representation. The Trustee makes no representation as to the validity or sufficiency of this Fourth Supplemental
Indenture. 
 7. Counterparts. The parties may sign any number of copies of this Fourth Supplemental Indenture. Each signed copy shall be an
original, but all of them together represent the same agreement. 
 8. Effect of Headings. The Section headings herein are for convenience
only and shall not affect the construction thereof. 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Fourth Supplemental Indenture to be duly
executed as of the date first above written. 
  

			
	 HORIZON LINES, LLC

		
	 By:
	 	 /s/ Robert Vass

	 Name: Robert Vass
 Title: Assistant
Secretary

 [Signature Page to Fourth Supplemental Indenture to Second Lien Indenture] 

 
			
	 ROAD RAIDERS TECHNOLOGY, INC.

		
	 By:
	 	 /s/ Jeffrey R. Yeager

	 Name: Jeffrey R. Yeager

Title: President and Secretary

  
 [Signature Page to
Fourth Supplemental Indenture to Second Lien Indenture] 

 
			
	 ROAD RAIDERS TRANSPORTATION, INC.

		
	 By:
	 	 /s/ Gary L. Jensen

	 Name: Gary L. Jensen

Title: President and Secretary

  
 [Signature Page to
Fourth Supplemental Indenture to Second Lien Indenture] 

 
			
	 ROAD RAIDERS LOGISTICS, INC.

ROAD RAIDERS INLAND, INC.

		
	 By:
	 	 /s/ Chris J. Dianora

	 Name: Chris J. Dianora

Title:   President, Road Raiders Logistics, Inc.

            Vice President, Road Raiders Inland,
Inc.

  
 [Signature Page to
Fourth Supplemental Indenture to Second Lien Indenture] 

 
			
	 U.S. BANK NATIONAL ASSOCIATION,

as Trustee

		
	 By:
	 	 /s/ K. Wendy Kumar

	 Name: K. Wendy Kumar

Title: Vice President

  
 [Signature Page to
Fourth Supplemental Indenture to Second Lien Indenture]EX-10.1

 Exhibit 10.1 

JOINDER TO SECURITY AND PLEDGE AGREEMENT 

Joinder No. 1 (this “Joinder”), dated as of March 20, 2014 by and among ROAD RAIDERS TRANSPORTATION, INC., a
Delaware corporation, ROAD RAIDERS INLAND, INC., a Delaware corporation, ROAD RAIDERS TECHNOLOGY, INC., a Delaware corporation, and ROAD RAIDERS LOGISTICS, INC., a Delaware corporation (collectively, the “New Subsidiaries” and each
individually a “New Subsidiary”) and U.S. BANK NATIONAL ASSOCIATION, a national banking association, in its capacity as collateral agent for the Secured Parties (in such capacity, together with its successors and assigns in such
capacity, “Collateral Agent”). 
 WITNESSETH: 

WHEREAS, pursuant to the Indenture, dated as of October 5, 2011 among the Grantors and U.S. Bank National Association, a national
banking association, as Trustee and Collateral Agent (as it may be amended, supplemented, extended, renewed, replaced, refunded, refinanced or modified from time to time, the “Indenture”), HORIZON LINES, LLC, a Delaware
limited liability company, (the “Issuer”), has issued to the Holders (as defined in the Indenture) the 11.00% First Lien Senior Secured Notes due 2016 (the “Notes”); 

WHEREAS, pursuant to the Indenture, the New Subsidiaries are required to execute, among other documents, a Supplemental Indenture in
order to become Guarantors under the Indenture; and 
 WHEREAS, pursuant to Section 24 of the Security Agreement (as
defined in the Indenture) the New Subsidiaries may become Grantors under the Security Agreement and thereby benefit from certain rights granted to the Grantors pursuant to the terms of the Note Documents; 

NOW, THEREFORE, for and in consideration of the foregoing and other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, each New Subsidiary hereby agrees as follows: 
 1. All initially capitalized terms used but not
otherwise defined herein have the meanings given to them in the Security Agreement or, if not defined therein, in the Indenture. 
 2. Each
of the New Subsidiaries, by its signature below, becomes a “Grantor” under the Security Agreement with the same force and effect as if originally named therein as a “Grantor” and such New Subsidiary hereby (a) agrees to all
of the terms and provisions of the Security Agreement applicable to it as a “Grantor” thereunder and (b) represents and warrants that the representations and warranties made by it as a “Grantor” thereunder are true and
correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that are already qualified or modified by materiality in the text thereof) on and as of the date hereof. In
furtherance of the foregoing, each New Subsidiary does hereby unconditionally grant to Collateral Agent, for the benefit of the Secured Parties, to secure the Secured Obligations, a continuing security interest in and to all of such New
Subsidiary’s right, title and interest in and to the Collateral. Schedule 2, “Commercial Tort Claims”, Schedule 3, “Intellectual Property”, Schedule 4, “Pledged Companies”, Schedule 5,
“List of Uniform 

 
Commercial Code Filing Jurisdictions”, Schedule 6, “Chassis”, Schedule 7a, “Vessels”, Schedule 7b, “Vessel Insurance”, Schedule 8
“Vessel Insurance” and Schedule 9 “Negotiable Collateral” to the Security Agreement, attached hereto supplement Schedules 2 through 9, respectively, to the Security Agreement. Each reference to a “Grantor” in the
Security Agreement and the other Note Documents shall be deemed to include the New Subsidiaries. The Security Agreement is incorporated herein by reference. Each New Subsidiary authorizes Collateral Agent at any time and from time to time to file,
transmit, or communicate, as applicable, financing statements and amendments thereto (i) describing the Collateral as “all personal property of debtor” or “all assets of debtor” or words of similar effect,
(ii) describing the Collateral as being of equal or lesser scope or with greater detail, or (iii) that contain any information required by part 5 of Article 9 of the Code for the sufficiency or filing office acceptance. Each of the New
Subsidiaries also hereby ratifies any and all financing statements or amendments previously filed by Collateral Agent in any jurisdiction in connection with the Note Documents. 

3. The New Subsidiaries, by their signatures below, become parties to the Intercreditor Agreement and each of the New Subsidiaries hereby
(a) agrees to all of the terms and provisions of the Intercreditor Agreement applicable to it as a “Guarantor/Grantor” thereunder and (b) represents and warrants that the representations and warranties made by it as a
“Grantor” thereunder are true and correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that are already qualified or modified by materiality in the text
thereof) on and as of the date hereof. Each reference to a “Guarantor/Grantor” in the Intercreditor Agreement shall be deemed to include the New Subsidiaries. 

4. Each of the New Subsidiaries represents and warrants to Collateral Agent and the Secured Parties that this Joinder has been duly executed
and delivered by such New Subsidiary and constitutes its legal, valid, and binding obligation, enforceable against it in accordance with its terms, except as enforceability thereof may be limited by bankruptcy, insolvency, reorganization, fraudulent
transfer, moratorium, or other similar laws affecting creditors’ rights generally and general principles of equity (regardless of whether such enforceability is considered in a proceeding at law or in equity). 

5. This Agreement is a Note Document. This Agreement may be executed in any number of counterparts and by different parties on separate
counterparts, each of which, when executed and delivered, shall be deemed to be an original, and all of which, when taken together, shall constitute but one and the same agreement. Delivery of an executed counterpart of this Joinder by telefacsimile
or other electronic method of transmission shall be equally as effective as delivery of an original executed counterpart of this Joinder. Any party delivering an executed counterpart of this Joinder by telefacsimile or other electronic method of
transmission also shall deliver an original executed counterpart of this Joinder but the failure to deliver an original executed counterpart shall not affect the validity, enforceability, and binding effect of this Joinder. 

6. The Security Agreement, as supplemented hereby, shall remain in full force and effect. 

  
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 7. THE VALIDITY OF THIS JOINDER, THE CONSTRUCTION, INTERPRETATION, AND ENFORCEMENT HEREOF, AND
THE RIGHTS OF THE PARTIES HERETO WITH RESPECT TO ALL MATTERS ARISING HEREUNDER OR RELATED HERETO SHALL BE DETERMINED UNDER, GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. 

8. THE PARTIES AGREE THAT ALL ACTIONS OR PROCEEDINGS ARISING IN CONNECTION WITH THIS JOINDER SHALL BE TRIED AND LITIGATED ONLY IN THE STATE
AND, TO THE EXTENT PERMITTED BY APPLICABLE LAW, FEDERAL COURTS LOCATED IN THE COUNTY OF NEW YORK, STATE OF NEW YORK; PROVIDED, HOWEVER, THAT ANY SUIT SEEKING ENFORCEMENT AGAINST ANY COLLATERAL OR OTHER PROPERTY MAY BE BROUGHT, AT COLLATERAL
AGENT’S OPTION, IN THE COURTS OF ANY JURISDICTION WHERE COLLATERAL AGENT ELECTS TO BRING SUCH ACTION OR WHERE SUCH COLLATERAL OR OTHER PROPERTY MAY BE FOUND. COLLATERAL AGENT AND EACH NEW SUBSIDIARY WAIVE, TO THE EXTENT PERMITTED UNDER
APPLICABLE LAW, ANY RIGHT EACH MAY HAVE TO ASSERT THE DOCTRINE OF FORUM NON CONVENIENS OR TO OBJECT TO VENUE TO THE EXTENT ANY PROCEEDING IS BROUGHT IN ACCORDANCE WITH THIS SECTION 8. 

9. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, COLLATERAL AGENT AND EACH NEW SUBSIDIARY HEREBY WAIVE THEIR RESPECTIVE RIGHTS TO A JURY
TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS JOINDER OR ANY OF THE TRANSACTIONS CONTEMPLATED HEREIN, INCLUDING CONTRACT CLAIMS, TORT CLAIMS, BREACH OF DUTY CLAIMS, AND ALL OTHER COMMON LAW OR STATUTORY CLAIMS. COLLATERAL
AGENT AND EACH NEW SUBSIDIARY REPRESENT THAT EACH HAS REVIEWED THIS WAIVER AND EACH KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL. IN THE EVENT OF LITIGATION, A COPY OF THIS JOINDER MAY BE FILED AS
A WRITTEN CONSENT TO A TRIAL BY THE COURT. 
 [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK] 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Joinder to the Security Agreement to be
executed and delivered as of the day and year first above written. 
  

			
	NEW SUBSIDIARIES:
	
	ROAD RAIDERS TECHNOLOGY, INC.
		
	 By:
	 	 /s/ Jeffrey R. Yeager

	 Name: Jeffrey R. Yeager

Title: President and Secretary

 [Signature Page to Joinder to First Lien Security Agreement] 

 
			
	ROAD RAIDERS TRANSPORTATION, INC.
		
	 By:
	 	 /s/ Gary L. Jensen

	 Name: Gary L. Jensen

Title: President and Secretary

  
 [Signature Page to
Joinder to First Lien Security Agreement] 

 
			
	 ROAD RAIDERS LOGISTICS, INC.

ROAD RAIDERS INLAND, INC.

		
	 By:
	 	 /s/ Chris J. Dianora

	 Name: Chris J. Dianora

Title: President, Road Raiders Logistics, Inc.

          Vice President, Road Raiders Inland, Inc.

  
 [Signature Page to
Joinder to First Lien Security Agreement] 

 
			
	 COLLATERAL AGENT:
  

U.S. BANK NATIONAL ASSOCIATION, as

Collateral Agent

		
	 By:
	 	 /s/ K. Wendy Kumar

	 Name: K. Wendy Kumar

Title: Vice President

  
 [Signature Page to
Joinder to First Lien Security Agreement]

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