Document:

First Supplemental Indenture, dated March 30, 2012

 Exhibit 4.2 
 FIRST SUPPLEMENTAL INDENTURE 
 THIS FIRST SUPPLEMENTAL INDENTURE (this “Supplemental
Indenture”), dated as of March 30, 2012, among HOS Port, LLC (the “Guaranteeing Subsidiary”), a subsidiary of Hornbeck Offshore Services, Inc. (or its permitted successor), a Delaware corporation (the
“Company”), the Company, the other Guarantors (as defined in the Indenture referred to herein) and Wells Fargo Bank, National Association, as trustee under the Indenture referred to below (the “Trustee”).

 WITNESSETH 
 WHEREAS, the
Company and certain Guarantors have heretofore executed and delivered to the Trustee an Indenture, dated as of November 13, 2006 (the “Indenture”), providing for the issuance of $250,000,000 in principal amount of 1.625%
Convertible Senior Notes due 2026 (the “Securities”); 
 WHEREAS, the Guaranteeing Subsidiary has guaranteed
the Company’s 5.875% Senior Notes due 2020 and, as such, is required pursuant to Sections 3.09 and 13.03 of the Indenture to execute this Supplemental Indenture and notation of guarantee of Notes; 

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a
supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Company’s Obligations under the Securities and the Indenture on the terms and conditions set forth herein (the “Subsidiary
Guarantee”); and 
 WHEREAS, pursuant to Section 3.09 of the Indenture, the Trustee is authorized to execute and deliver
this Supplemental Indenture. 
 NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the
receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Securities as follows: 

1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

 2. Agreement to Guarantee. The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and
subject to the conditions set forth in the Subsidiary Guarantee and in the Indenture including but not limited to Article 13 thereof. 

3. No Recourse Against Others. No past, present or future director, officer, employee, incorporator, stockholder or agent of the
Guaranteeing Subsidiary (other than the Company or a Guarantor in its capacity as a stockholder of a Subsidiary), as such, shall have any liability for any obligations of the Company or any Guaranteeing Subsidiary under the Securities, any
Subsidiary Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of or by reason of, such 

 
obligations or their creation. Each Holder of the Securities by accepting a Security waives and releases all such liability. The waiver and release are part of the consideration for issuance of
the Securities. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy. 

4. New York Law to Govern. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE BUT
WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 
 5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 

6. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof. 

7. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this
Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Company. 
 [Remainder of Page Intentionally Left Blank] 

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

			
	HORNBECK OFFSHORE SERVICES, INC.
		
	By:	 	 /s/ James O. Harp, Jr.

		 	Name: James O. Harp, Jr.
		 	Title: Executive Vice President and
		 	          Chief Financial Officer
	
	GUARANTORS:
	
	ENERGY SERVICES PUERTO RICO, LLC
	HORNBECK OFFSHORE SERVICES, LLC
	HORNBECK OFFSHORE
	TRANSPORTATION, LLC
	HORNBECK OFFSHORE OPERATORS, LLC
	HOS-IV, LLC
	HORNBECK OFFSHORE TRINIDAD & TOBAGO, LLC
	HOS PORT, LLC
		
	By:	 	 /s/ James O. Harp, Jr.

		 	Name: James O. Harp, Jr.
		 	Title: Executive Vice President and
		 	          Chief Financial Officer
	
	WELLS FARGO BANK, NATIONAL ASSOCIATION, as Trustee
		
	By:	 	 /s/ Martin Reed

		 	Name: Martin Reed
		 	Title: Vice President

 NOTATION OF GUARANTEE 
 For value received, each Guarantor (which term includes any successor Person under the Indenture) has, jointly and severally, unconditionally guaranteed, to the extent set forth and subject to the provisions in the
Indenture (the “Indenture”), dated as of November 13, 2006, among Hornbeck Offshore Services, Inc. (the “Company”), the guarantors party thereto and Wells Fargo Bank, National Association, as trustee (the
“Trustee”), (a) the due and punctual payment of the principal of, premium, if any, and interest (including Additional Interest, if any) on, the Securities, whether at Stated Maturity, by acceleration, redemption or otherwise,
and the due and punctual payment of interest on overdue principal of, premium, if any, and interest (including Additional Interest) on the Securities, if any, if lawful, and (b) in case of any extension of time of payment or renewal of any
Securities or any of such other obligations, that the same will be promptly paid in full when due, whether at Stated Maturity, by acceleration or otherwise. The obligations of the Guarantors to the Holders of Securities and to the Trustee pursuant
to the Subsidiary Guarantee and the Indenture are expressly set forth in Article 13 of the Indenture and reference is hereby made to the Indenture for the precise terms of the Subsidiary Guarantee. Each Holder of a Security, by accepting the same,
(a) agrees to and shall be bound by such provisions and (b) appoints the Trustee attorney-in-fact of such Holder for such purpose. 
 Capitalized terms used but not defined herein have the meanings given to them in the Indenture. 

[Signature Page Follows] 

 IN WITNESS WHEREOF, the party hereto has caused this Notation of Subsidiary Guarantee to be duly
executed, all as of the date first written above. 
  

			
	HOS PORT, LLC
		
	By:	 	 /s/ James O. Harp, Jr.

		 	Name: James O. Harp, Jr.
		 	Title: Executive Vice President and
		 	          Chief Financial OfficerFirst Supplemental Indenture, dated March 30, 2012

 Exhibit 4.3 
  

 
 HORNBECK OFFSHORE SERVICES, INC.

 and 
 the
Guarantors named herein 
  
  

Series A and Series B 

8.000% Senior Notes due 2017 
  

 
 FIRST SUPPLEMENTAL
INDENTURE 
 Dated as of March 30, 2012 

 
  

WELLS FARGO BANK, NATIONAL ASSOCIATION 
 Trustee 
  
  

 This FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of
March 30, 2012, is among Hornbeck Offshore Services, Inc., a Delaware corporation (the “Company”), each of the parties identified under the caption “Guarantors” on the signature page hereto, including HOS Port, LLC (the
“HOS Port”) and Wells Fargo Bank, National Association, a national banking association, as trustee (the “Trustee”). 

RECITALS 
 WHEREAS, the
Company, certain Guarantors and the Trustee entered into an Indenture, dated as of August 17, 2009 (the “Indenture”), pursuant to which the Company issued $250,000,000 in principal amount of 8.000% Senior Notes due 2017 (the
“Notes”); and 
 WHEREAS, Section 9.01(f) of the Indenture provides that the Company, the Guarantors and the Trustee
may amend or supplement the Indenture in order to add any new Guarantor to comply with Section 10.02 or 10.03 thereof, without the consent of the Holders of the Notes; 

WHEREAS, HOS Port has guaranteed the Company’s 5.875% Senior Notes due 2020 and, as such, is required pursuant to Sections 4.13 and
10.02 of the Indenture to execute this Supplemental Indenture and notation of guarantee of Notes; and 
 WHEREAS, all acts and
things prescribed by the Indenture, by law and by the charter and the bylaws (or comparable constituent documents) of the Company, of the Guarantors and of the Trustee necessary to make this Supplemental Indenture a valid instrument legally binding
on the Company, the Guarantors and the Trustee, in accordance with its terms, have been duly done and performed; 
 NOW, THEREFORE, to
comply with the provisions of the Indenture and in consideration of the above premises, the Company, the Guarantors and the Trustee covenant and agree for the equal and proportionate benefit of the respective Holders of the Notes as follows:

 ARTICLE 1 

SECTION 1.01. This Supplemental Indenture is supplemental to the Indenture and does and shall be deemed to form a part of, and shall be
construed in connection with and as part of, the Indenture for any and all purposes. 
 SECTION 1.02. This Supplemental Indenture
shall become effective immediately upon its execution and delivery by each of the Company, the Guarantors and the Trustee. 
 ARTICLE 2

 SECTION 2.01. From this date, in accordance with Section 10.02 or 10.03 and by executing this Supplemental
Indenture and the accompanying notation of Subsidiary Guarantee, attached hereto as Exhibit A, the Guarantors whose signatures appear below are subject to the provisions of the Indenture to the extent provided for in Article 10
thereunder. 

  
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 ARTICLE 3 
 SECTION 3.01. Except as specifically modified herein, the Indenture and the Notes are in all respects ratified and confirmed (mutatis mutandis) and shall remain in full force and effect in accordance with
their terms with all capitalized terms used herein without definition having the same respective meanings ascribed to them as in the Indenture. 
 SECTION 3.02. Except as otherwise expressly provided herein, no duties, responsibilities or liabilities are assumed, or shall be construed to be assumed, by the Trustee by reason of this Supplemental
Indenture. This Supplemental Indenture is executed and accepted by the Trustee subject to all the terms and conditions set forth in the Indenture with the same force and effect as if those terms and conditions were repeated at length herein and made
applicable to the Trustee with respect hereto. 
 SECTION 3.03. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO
CONSTRUE AND ENFORCE THIS SUPPLEMENTAL INDENTURE. 
 SECTION 3.04. The parties may sign any number of copies of this Supplemental
Indenture. Each signed copy shall be an original, but all of such executed copies together shall represent the same agreement. 

[Remainder of Page Intentionally Left Blank] 

  
 3 

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

					
	HORNBECK OFFSHORE SERVICES, INC.
		
	By:	 	 /s/ James O. Harp, Jr.

		 	Name: James O. Harp, Jr.
		 	Title:	 	Executive Vice President and Chief
		 		 	Financial Officer
	
	GUARANTORS:
	
	 ENERGY SERVICES PUERTO RICO, LLC

HORNBECK OFFSHORE SERVICES, LLC

	 HORNBECK OFFSHORE TRANSPORTATION, LLC

HORNBECK OFFSHORE OPERATORS, LLC
 HOS-IV, LLC

HORNBECK OFFSHORE TRINIDAD & TOBAGO, LLC
 HOS PORT,
LLC

		
	By:	 	 /s/ James O. Harp, Jr.

		 	Name: James O. Harp, Jr.
		 	Title:	 	Executive Vice President and Chief
		 		 	Financial Officer
	
	 WELLS FARGO BANK, NATIONAL

ASSOCIATION, as Trustee

		
	By:	 	 /s/ Martin Reed

		 	Name: Martin Reed
		 	Title: Vice President

  
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 EXHIBIT A 
 NOTATION OF SUBSIDIARY GUARANTEE 
 Subject to Section 10.06 of the Indenture, each
Guarantor has jointly and severally, unconditionally guaranteed to each Holder of a Note authenticated and delivered by the Trustee and to the Trustee and its successors and assigns, irrespective of the validity and enforceability of the Indenture,
the Notes and the Obligations of the Company under the Notes or under the Indenture, that: (a) the principal of, and premium, if any, and interest on, the Notes will be promptly paid in full when due, subject to any applicable grace period,
whether at Stated Maturity, by acceleration, redemption or otherwise, and interest on overdue principal of, and premium, if any, and interest (to the extent permitted by law) on, the Notes and all other payment Obligations of the Company to the
Holders or the Trustee under the Indenture or under the Notes will be promptly paid in full and performed, all in accordance with the terms thereof; and (b) in case of any extension of time of payment or renewal of any Notes or any of such
other payment Obligations, the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, subject to any applicable grace period, whether at Stated Maturity, by acceleration, redemption or
otherwise. Failing payment when so due of any amount so guaranteed or any performance so guaranteed for whatever reason, the Guarantors will be jointly and severally obligated to pay the same immediately. An Event of Default under the Indenture or
the Notes shall constitute an event of default under the Subsidiary Guarantees, and shall entitle the Holders to accelerate the obligations of the Guarantors under the Indenture in the same manner and to the same extent as the Obligations of the
Company. The Guarantors have agreed that their Obligations under the Indenture shall be unconditional, irrespective of the validity, regularity or enforceability of the Notes or the Indenture, the absence of any action to enforce the same, any
waiver or consent by any Holder with respect to any provisions hereof or thereof, the recovery of any judgment against the Company, any action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable
discharge or defense of a Guarantor. Each Guarantor further, to the extent permitted by law, has waived diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of the Company, any right to
require a proceeding first against the Company, protest, notice and all demands whatsoever and covenants that its Subsidiary Guarantee will not be discharged except by complete performance of the Obligations contained in the Notes and the Indenture.
If any Holder or the Trustee is required by any court or otherwise to return to the Company, the Guarantors, or any Note Custodian, Trustee, liquidator or other similar official acting in relation to either the Company or the Guarantors, any amount
paid by the Company or any Guarantor to the Trustee or such Holder, the Subsidiary Guarantees, to the extent theretofore discharged, shall be reinstated in full force and effect. Each Guarantor has agreed that it shall not be entitled to, and hereby
has waived, any right of subrogation in relation to the Holders in respect of any Obligations guaranteed under the Indenture. Each Guarantor further has agreed that, as between the Guarantors, on the one hand, and the Holders and the Trustee, on the
other hand, (a) the maturity of the Obligations guaranteed under the Indenture may be accelerated as provided in Article 6 of the Indenture for the purposes of its Subsidiary Guarantee, notwithstanding any stay, injunction or other prohibition
preventing such acceleration in respect of the Obligations guaranteed thereby, and (b) in the event of any declaration of acceleration of such Obligations as provided in Article 6 of the Indenture, such Obligations (whether or not due and
payable) shall forthwith become due and payable by the Guarantor for 

  
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the purpose of its Subsidiary Guarantee. The Guarantors shall have the right to seek contribution from any non-paying Guarantor so long as the exercise of such right does not impair the rights of
the Holders under the Subsidiary Guarantees. 
 The obligations of the Guarantors to the Holders and to the Trustee pursuant to the
Subsidiary Guarantees and the Indenture are expressly set forth in Article 10 of the Indenture, and reference is hereby made to such Indenture for the precise terms of the Subsidiary Guarantees. The terms of Article 10 of the Indenture are
incorporated herein by reference. The Subsidiary Guarantees are subject to release as and to the extent provided in Sections 10.04 and 10.05 of the Indenture. 
 Each Subsidiary Guarantee is a continuing guarantee and shall remain in full force and effect and shall be binding upon each Guarantor and its respective successors and assigns to the extent set forth in the
Indenture until full and final payment of all of the Company’s Obligations under the Notes and the Indenture and shall inure to the benefit of the successors and assigns of the Trustee and the Holders and, in the event of any transfer or
assignment of rights by any Holder or the Trustee, the rights and privileges conferred in the Indenture upon that party shall automatically extend to and be vested in such transferee or assignee, all subject to the terms and conditions hereof. Each
Subsidiary Guarantee is a guarantee of payment and not a guarantee of collection. 
 For purposes hereof, each Guarantor’s liability
under its Subsidiary Guarantee shall be limited in amount as provided in Section 10.06 of the Indenture. 
 Capitalized terms used
herein have the same meanings given in the Indenture unless otherwise indicated. 
 [Remainder of Page Intentionally Left Blank]

  
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 IN WITNESS WHEREOF, the party hereto has caused this Notation of Subsidiary Guarantee to be duly
executed, all as of the date first written above. 
  

					
	HOS PORT, LLC
		
	By:	 	 /s/ James O. Harp, Jr.

		 	Name: James O. Harp, Jr.
		 	Title:	 	Executive Vice President and Chief
		 		 	Financial Officer

  
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