Document:

Exhibit 4.2

 Exhibit 4.2 
 SUPPLEMENTAL INDENTURE 
 dated as of March 30, 2011 

among 

Huntington Ingalls Industries, Inc., 
 The Guarantor(s) Party Hereto 
 and 

The Bank of New York Mellon, 
 as Trustee 
  

 
 6.875% Senior
Notes due 2018 
 7.125% Senior Notes due 2021 

 THIS SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), entered into
as of March 30, 2011, among Huntington Ingalls Industries, Inc., a Delaware corporation (the “Company”); Northrop Grumman Shipbuilding, Inc., a Virginia corporation, Newport News Energy Company, a Virginia corporation, Newport
News Reactor Services, Inc., a Virginia corporation, Newport News Industrial Corporation, a Virginia corporation, Newport News Nuclear, Inc., a Virginia corporation, Newport News Shipbuilding and Dry Dock Company, a Delaware corporation, Ingalls
Shipbuilding, Inc., a Delaware corporation, Northrop Grumman Ship Systems International, Inc., a Nevada corporation, Continental Maritime of San Diego, Inc., a California corporation, Fleet Services Holding Corp., a Delaware corporation, and AMSEC
LLC, a Delaware limited liability company, (each an “Undersigned”); and The Bank of New York Mellon, as trustee (the “Trustee”). 
 RECITALS 
 WHEREAS, the Company and the Trustee entered into the Indenture,
dated as of March 11,2011 (the “Indenture”), relating to the Company’s 6.875% Senior Notes due 2018 (the “2018 Notes”) and 7.125% Senior Notes due 2021 (the “2021 Notes” and together with
the 2018 Notes, the “Notes”); 
 WHEREAS, as a condition to the Trustee entering into the Indenture and the
purchase of the Notes by the Holders, the Company agreed pursuant to the Indenture to cause Domestic Restricted Subsidiaries that Guarantee any Debt under the Credit Agreement to enter into this Supplemental Indenture to provide Guaranties.

 AGREEMENT 
 NOW, THEREFORE, in consideration of the premises and mutual covenants herein contained and intending to be legally bound, the parties to this Supplemental Indenture hereby agree as follows: 

Section 1. Capitalized terms used herein and not otherwise defined herein are used as defined in the Indenture. 

Section 2. Each Undersigned, by its execution of this Supplemental Indenture, agrees to be a Guarantor under the Indenture and to be
bound by the terms of the Indenture applicable to Guarantors, including, but not limited to, Article 10 thereof. 

Section 3. This Supplemental Indenture shall be governed by and construed in accordance with the laws of the State of New York.

 Section 4. This Supplemental Indenture may be signed in various counterparts which together will constitute one and the
same instrument. 
 Section 5. This Supplemental Indenture is an amendment supplemental to the Indenture and the Indenture
and this Supplemental Indenture will henceforth be read together. 

 Section 6. 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 other parties hereto. 

  
 3 

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

					
	 Huntington Ingalls Industries, Inc.,
as Issuer

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer
	
	 Northrop Grumman Shipbuilding, Inc.,
as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer
	
	 Newport News Energy Company,
as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer
	
	 Newport News Reactor Services, Inc.,
as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer

 [Signature page to Supplemental Indenture] 

 
					
	 Newport News Industrial Corporation,
as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer
	
	 Newport News Nuclear, Inc.,
as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer
	
	 Newport News Shipbuilding and Dry
Dock Company, as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer
	
	 Northrop Grumman Ship Systems
International, Inc., as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer

  
 [Signature
page to Supplemental Indenture] 

 
					
	 Continental Maritime of San Diego, Inc.,
as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer
	
	 Fleet Services Holding Corp.,
as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer
	
	 AMSEC LLC, as Guarantor

		
	By:	 	/s/ Mark Rabinowitz
		 	Name:	 	Mark Rabinowitz
		 	Title:	 	Treasurer

  
 [Signature
page to Supplemental Indenture] 

 
					
	 Ingalls Shipbuilding, Inc.,
as Guarantor

		
	By:	 	/s/ Kathleen M. Salmas
		 	Name:	 	Kathleen M. Salmas
		 	Title:	 	Secretary

  
 [Signature
page to Supplemental Indenture] 

 
					
	 The Bank of New York Mellon,
as Trustee

		
	By:	 	/s/ Laurence J. O’Brien
		 	Name:	 	Laurence J. O’Brien
		 	Title:	 	Vice President

  
 [Signature
page to Supplemental Indenture]Exhibit 4.3

 Exhibit 4.3 
 $1,200,000,000 
 HUNTINGTON INGALLS INDUSTRIES, INC. 

$600,000,000 6.875% Senior Notes due 2018 
 $600,000,000 7.125% Senior Notes due 2021 
 REGISTRATION RIGHTS
AGREEMENT 
 March 11, 2011 
 CREDIT SUISSE SECURITIES (USA) LLC 
 J.P.
MORGAN SECURITIES LLC, 
 As Representatives of the Several Initial Purchasers, 

 

	c/o	Credit Suisse Securities (USA) LLC 

 Eleven Madison Avenue, 
 New York, New York 10010-3629 

J.P. Morgan Securities LLC 
 383 Madison Avenue, 27th floor 
 New York, New York 10179 

Dear Sirs: 
 Huntington Ingalls
Industries, Inc., a Delaware corporation (the “Issuer”), proposes to issue and sell to Credit Suisse Securities (USA) LLC and J.P. Morgan Securities LLC, as representatives of the initial purchasers (collectively, the
“Initial Purchasers”), upon the terms set forth in a purchase agreement dated March 4, 2011 (the “Purchase Agreement”), U.S.$600,000,000 aggregate principal amount of its 6.875% Senior Notes due 2018 (the
“2018 Notes”) and U.S.$600,000,000 aggregate principal amount of its 7.125% Senior Notes due 2021 (the “2021 Notes” and together with the 2018 Notes, the “Initial Securities”) to be unconditionally
guaranteed (the “Guarantees”) from and after the Escrow Release Date (as defined in the Purchase Agreement) by each of the Issuer’s U.S. restricted subsidiaries that guarantees the Issuer’s senior secured credit agreement
among the Issuer, the guarantors named therein, the lenders party thereto and JPMorgan Chase Bank, N.A., as agent (the “Guarantors”, and together with the Issuer, the “Company”). Each Guarantor will become a party
hereto by execution of a joinder agreement on the Escrow Release Date and, from after such time, all references to Guarantors will include such Guarantors. The Initial Securities will be issued pursuant to an Indenture, dated as of March 11,
2011 (the “Indenture”) among the Company and The Bank of New York Mellon (the “Trustee”). As an inducement to the Initial Purchasers, the Company agrees with the Initial Purchasers, for the benefit of the holders of
the Initial Securities (including, without limitation, the Initial Purchasers), the Exchange Securities (as defined below) and the Private Exchange Securities (as defined below) (collectively the “Holders”), as follows: 

1. Registered Exchange Offer. The Company shall, at its own cost, after the date of original issue of the Initial
Securities (the “Issue Date”) use commercially reasonable best efforts to prepare and file with the Securities and Exchange Commission (the “Commission”) a registration statement (the “Exchange Offer
Registration Statement”) on an appropriate form under the Securities Act of 1933, as amended (the “Securities Act”), with respect to a proposed offer (the “Registered Exchange Offer”) to the Holders of
Transfer Restricted Securities (as defined in Section 6(d) hereof), who are not prohibited by any law or 

 
policy of the Commission from participating in the Registered Exchange Offer, to issue and deliver to such Holders, in exchange for the Initial Securities of each series, a like aggregate
principal amount of debt securities (the “Exchange Securities”) of the Company issued under the Indenture and identical in all material respects to the Initial Securities of the applicable series (except for the removal of transfer
restrictions relating to the Initial Securities and the provisions relating to the matters described in Section 6 hereof) that would be registered under the Securities Act. The Company shall use its commercially reasonable best efforts to cause
such Exchange Offer Registration Statement to become effective under the Securities Act and shall use its commercially reasonable best efforts to keep the Exchange Offer Registration Statement effective for not less than 20 business days (or
longer, if required by applicable law) after the date notice of the Registered Exchange Offer is mailed to the Holders (such period being called the “Exchange Offer Registration Period”). 

If the Company commences the Registered Exchange Offer, the Company will be entitled to close the Registered Exchange Offer 20 business
days after such commencement provided that the Company has accepted all the Initial Securities theretofore validly tendered in accordance with the terms of the Registered Exchange Offer. 

Following the declaration of the effectiveness of the Exchange Offer Registration Statement, the Company shall
promptly commence the Registered Exchange Offer, it being the objective of such Registered Exchange Offer to enable each Holder of Transfer Restricted Securities electing to exchange the Initial Securities for Exchange Securities (assuming that such
Holder is not an affiliate of the Company within the meaning of the Securities Act, acquires the Exchange Securities in the ordinary course of such Holder’s business, is not a broker-dealer tendering Initial Securities acquired directly from
the Company for its own account and is not engaged in, and does not intend to engage in, and has no arrangement or understanding with any person to participate in the distribution of the Exchange Securities and is not prohibited by any law or policy
of the Commission from participating in the Registered Exchange Offer) to trade such Exchange Securities from and after their receipt without any limitations or restrictions under the Securities Act and without material restrictions under the
securities laws of the several states of the United States. The Company shall use its commercially reasonable best efforts to consummate the Registered Exchange Offer no later than the 366th day after the Issue Date (such 366th day, the “Consummation Deadline”). 

The Company acknowledges that, pursuant to current interpretations by the Commission’s staff of Section 5 of the Securities
Act, in the absence of an applicable exemption therefrom, (i) each Holder which is a broker-dealer electing to exchange Securities, acquired for its own account as a result of market making activities or other trading activities, for Exchange
Securities (an “Exchanging Dealer”), is required to deliver a prospectus containing the information set forth in (a) Annex A hereto on the cover, (b) Annex B hereto in the “Exchange Offer Procedures” section and
the “Purpose of the Exchange Offer” section, and (c) Annex C hereto in the “Plan of Distribution” section of such prospectus in connection with a sale of any such Exchange Securities received by such Exchanging Dealer
pursuant to the Registered Exchange Offer and (ii) an Initial Purchaser that elects to sell Exchange Securities acquired in exchange for Securities constituting any portion of an unsold allotment is required to deliver a prospectus containing
the information required by Items 507 or 508 of Regulation S-K under the Securities Act, as applicable, in connection with such sale. 
 The Company shall use its commercially reasonable best efforts to keep the Exchange Offer Registration Statement effective and to amend and supplement the prospectus contained therein, in order to permit
such prospectus to be lawfully delivered by all persons subject to the prospectus delivery requirements of the Securities Act for such period of time as such persons must comply with such requirements in order to resell the Exchange Securities;
provided, however, that (i) in the case where such prospectus and any amendment or supplement thereto must be delivered by an Exchanging Dealer or an Initial Purchaser, such period shall be the lesser of 180 days and the date on which all
Exchanging Dealers 

  
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and the Initial Purchasers have sold all Exchange Securities held by them (unless such period is extended pursuant to Section 3(j) below) and (ii) the Company shall make such prospectus
and any amendment or supplement thereto, available to any broker-dealer for use in connection with any resale of any Exchange Securities for a period of not less than 90 days after the consummation of the Registered Exchange Offer. 

If, upon consummation of the Registered Exchange Offer, any Initial Purchaser holds Initial Securities acquired by it as part of its
initial distribution, the Company, simultaneously with the delivery of the Exchange Securities pursuant to the Registered Exchange Offer, shall issue and deliver to such Initial Purchaser upon the written request of such Initial Purchaser, in
exchange (the “Private Exchange”) for the Initial Securities of each series held by such Initial Purchaser, a like principal amount of debt securities of the Company issued under the Indenture of the applicable series and identical
in all material respects (including the existence of restrictions on transfer under the Securities Act and the securities laws of the several states of the United States, but excluding provisions relating to the matters described in Section 6
hereof) to the Initial Securities (the “Private Exchange Securities”). The Initial Securities, the Exchange Securities and the Private Exchange Securities are herein collectively called the “Securities”. 

In connection with the Registered Exchange Offer, the Company shall: 

(a) mail to each Holder a copy of the prospectus forming part of the Exchange Offer Registration Statement, together
with an appropriate letter of transmittal and related documents; 
 (b) keep the Registered Exchange Offer
open for not less than 20 business days (or longer, if required by applicable law) after the date notice thereof is mailed to the Holders; 
 (c) utilize the services of a depositary for the Registered Exchange Offer with an address in the Borough of Manhattan, The City of New York, which may be the Trustee or an affiliate of the Trustee;

 (d) permit Holders to withdraw tendered Securities at any time prior to the close of business, New York
time, on the last business day on which the Registered Exchange Offer shall remain open; and 

(e) otherwise comply in all material respects with all applicable laws. 

As soon as practicable after the close of the Registered Exchange Offer or the Private Exchange, as the case may be, the Company shall:

 (x) accept for exchange all the Securities validly tendered and not withdrawn pursuant to the Registered
Exchange Offer and the Private Exchange; 
 (y) deliver to the Trustee for cancellation all the Initial
Securities so accepted for exchange; and 
 (z) cause the Trustee to authenticate and deliver promptly to
each Holder of the Initial Securities, Exchange Securities or Private Exchange Securities of each series, as the case may be, equal in principal amount to the Initial Securities of the applicable series of such Holder so accepted for exchange.

 The Indenture provides that the Exchange Securities will not be subject to the transfer restrictions set forth in the
Indenture and that all the Securities of each series will vote and consent together on all matters as one class and that none of the Securities of a series will have the right to vote or consent as a class separate from one another on any matter.

  
 3 

 Interest on each Exchange Security and Private Exchange Security issued pursuant to the
Registered Exchange Offer and in the Private Exchange will accrue from the last interest payment date on which interest was paid on the Initial Securities surrendered in exchange therefor or, if no interest has been paid on the Initial Securities,
from the date of original issue of the Initial Securities. 
 Each Holder participating in the Registered Exchange Offer shall
be required to represent to the Company that at the time of the consummation of the Registered Exchange Offer (i) any Exchange Securities received by such Holder will be acquired in the ordinary course of business, (ii) such Holder is not
engaged in, and does not intend to engage in, and has no arrangements or understanding with any person to participate in the distribution of the Securities or the Exchange Securities within the meaning of the Securities Act, (iii) such Holder
is not an “affiliate,” as defined in Rule 405 of the Securities Act, of the Company or if it is an affiliate, such Holder will comply with the registration and prospectus delivery requirements of the Securities Act to the extent
applicable, (iv) if such Holder is a broker-dealer, that it will receive Exchange Securities for its own account in exchange for Initial Securities that were acquired as a result of market-making activities or other trading activities and that
it will be required to acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Securities. 

Notwithstanding any other provisions hereof, the Company will ensure that (i) any Exchange Offer Registration Statement and any
amendment thereto and any prospectus forming part thereof and any supplement thereto complies in all material respects with the applicable requirements of the Securities Act and the rules and regulations thereunder, (ii) any Exchange Offer
Registration Statement and any amendment thereto does not, when it becomes effective, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not
misleading and (iii) any prospectus forming part of any Exchange Offer Registration Statement, and any supplement to such prospectus, does not include an untrue statement of a material fact or omit to state a material fact required to be stated
therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. 
 2. Shelf Registration. If, (i) because of any change in law or in applicable interpretations thereof by the staff of the Commission, the Company is not permitted to effect a Registered
Exchange Offer, as contemplated by Section 1 hereof, (ii) the Registered Exchange Offer is not consummated within 366 days after the Issue Date, (iii) any Initial Purchaser so requests with respect to the Initial Securities (or the
Private Exchange Securities) held by it that are not eligible to be exchanged for Exchange Securities in the Registered Exchange Offer and held by it following consummation of the Registered Exchange Offer or (iv) any Holder (other than an
Exchanging Dealer) is not eligible to participate in the Registered Exchange Offer and holds Initial Securities following consummation of the Exchange Offer or any Holder (other than an Exchanging Dealer) that participates in the Registered Exchange
Offer does not receive freely tradeable Exchange Securities on the date of the exchange and, in each case, such Holder so requests, the Company shall take the following actions: 

(a) The Company shall, at its cost, with respect to (i) in the preceding paragraph, by the
Consummation Deadline, and with respect to (ii) through (iv) in the preceding paragraph, within 30 days after so required or requested pursuant to this Section 2 (the Consummation Deadline or such 30th day, as applicable, a “filing deadline”) use its
commercially reasonable best efforts to file with the Commission and thereafter shall use its commercially reasonable best efforts to cause to be declared effective (unless it becomes effective automatically upon filing) no later than 60 days after
the applicable filing deadline (such 60th day, an
“effectiveness deadline”) a registration statement (the “Shelf Registration Statement” and, together with the Exchange Offer Registration Statement, a “Registration Statement”) on an appropriate
form under the Securities Act relating to the offer and sale of the Transfer Restricted Securities (as defined in Section 6(d) hereof) by the Holders thereof from time to time in accordance with the methods of distribution set forth in the

  
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Shelf Registration Statement and Rule 415 under the Securities Act (hereinafter, the “Shelf Registration”); provided, however, that no Holder (other than an Initial Purchaser)
shall be entitled to have the Securities held by it covered by such Shelf Registration Statement unless such Holder agrees in writing to be bound by all the provisions of this Agreement applicable to such Holder. 

(b) The Company shall use its commercially reasonable best efforts to keep the Shelf Registration Statement
continuously effective until the date on which all Initial Securities registered thereunder are disposed of in accordance therewith. The Company shall be deemed not to have used its commercially reasonable best efforts to keep the Shelf Registration
Statement effective during the requisite period if it voluntarily takes any action that would result in Holders of Securities covered thereby not being able to offer and sell such Securities during that period, unless such action is required by
applicable law. 
 (c) Notwithstanding any other provisions of this Agreement to the contrary, the Company
shall cause the Shelf Registration Statement and the related prospectus and any amendment or supplement thereto, as of its respective effective date, (i) to comply in all material respects with the applicable requirements of the Securities Act
and the rules and regulations of the Commission and (ii) not to contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the
circumstances under which they were made, not misleading. 
 3. Registration Procedures. In connection with any
Shelf Registration contemplated by Section 2 hereof and, to the extent applicable, any Registered Exchange Offer contemplated by Section 1 hereof, the following provisions shall apply: 

(a) The Company shall (i) cause to be furnished to each Initial Purchaser, prior to the filing thereof with the
Commission, a copy of the Registration Statement and each amendment thereof and each supplement, if any, to the prospectus included therein and, in the event that an Initial Purchaser (with respect to any portion of an unsold allotment from the
original offering) is participating in the Registered Exchange Offer or the Shelf Registration Statement, the Company shall use its commercially reasonable best efforts to reflect in each such document, when so filed with the Commission, such
comments as such Initial Purchaser reasonably may propose; (ii) include the information set forth in Annex A hereto on the cover, in Annex B hereto in the “Exchange Offer Procedures” section and the “Purpose of the Exchange
Offer” section and in Annex C hereto in the “Plan of Distribution” section of the prospectus forming a part of the Exchange Offer Registration Statement and include the information set forth in Annex D hereto in the Letter of
Transmittal delivered pursuant to the Registered Exchange Offer; (iii) if requested by an Initial Purchaser, include the information required by Items 507 or 508 of Regulation S-K under the Securities Act, as applicable, in the prospectus
forming a part of the Exchange Offer Registration Statement; (iv) include within the prospectus contained in the Exchange Offer Registration Statement a section entitled “Plan of Distribution,” reasonably acceptable to the Initial
Purchasers, which shall contain a summary statement of the positions taken or policies made by the staff of the Commission with respect to the potential “underwriter” status of any broker-dealer that is the beneficial owner (as defined in
Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) of Exchange Securities received by such broker-dealer in the Registered Exchange Offer (a “Participating Broker-Dealer”),
whether such positions or policies have been publicly disseminated by the staff of the Commission or such positions or policies, in the reasonable judgment of the Initial Purchasers based upon advice of counsel (which may be in-house counsel),
represent the prevailing views of the staff of the Commission; and (v) in the case of a Shelf Registration Statement, include in the prospectus included in the Shelf Registration Statement (or, if permitted by Commission Rule 430B(b), in a
prospectus supplement that becomes 

  
 5 

 
a part thereof pursuant to Commission Rule 430B(f)) that is delivered to any Holder pursuant to Section 3(d) and (f), the names of the Holders, who propose to sell Securities
pursuant to the Shelf Registration Statement, as selling security holders. 
 (b) The Company shall give
written notice to the Initial Purchasers, the Holders of the Securities and any Participating Broker-Dealer from whom the Company has received prior written notice that it will be a Participating Broker-Dealer in the Registered Exchange Offer (which
notice pursuant to clauses (ii)-(v) hereof shall be accompanied by an instruction to suspend the use of the prospectus until the requisite changes have been made): 

(i) when the Registration Statement or any amendment thereto has been filed with the Commission and when the
Registration Statement or any post-effective amendment thereto has become effective; 
 (ii) of any request
by the Commission for amendments or supplements to the Registration Statement or the prospectus included therein or for additional information; 
 (iii) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or the initiation of any proceedings for that purpose, of the issuance by the
Commission of a notification of objection to the use of the form on which the Registration Statement has been filed, and of the happening of any event that causes the Company to become an “ineligible issuer,” as defined in Commission
Rule 405; 
 (iv) of the receipt by the Company or its legal counsel of any notification with respect
to the suspension of the qualification of the Securities for sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose; and 
 (v) of the happening of any event that requires the Company to make changes in the Registration Statement or the prospectus in order that the Registration Statement or the prospectus do not contain
an untrue statement of a material fact nor omit to state a material fact required to be stated therein or necessary to make the statements therein (in the case of the prospectus, in light of the circumstances under which they were made) not
misleading. 
 (c) The Company shall use its commercially reasonable best efforts to obtain the withdrawal
at the earliest possible time, of any order suspending the effectiveness of the Registration Statement. 

(d) The Company shall cause to be furnished to each Holder of Securities included within the coverage of the Shelf
Registration, without charge, at least one copy of the Shelf Registration Statement and any post-effective amendment or supplement thereto, including financial statements and schedules, and, if the Holder so requests in writing, all exhibits thereto
(including those, if any, incorporated by reference). The Company shall not, without the prior consent of the Initial Purchasers, make any offer relating to the Securities that would constitute a “free writing prospectus,” as defined in
Commission Rule 405. 
 (e) The Company shall cause to be delivered to each Exchanging Dealer and each
Initial Purchaser, and to any other Holder who so requests, without charge, at least one copy of the Exchange Offer Registration Statement and any post-effective amendment thereto, including financial statements and schedules, and, if any Initial
Purchaser or any such Holder requests, all exhibits thereto (including those incorporated by reference). 

  
 6 

 (f) The Company shall, during the Shelf Registration Period, cause to
be delivered to each Holder of Securities included within the coverage of the Shelf Registration, without charge, as many copies of the prospectus (including each preliminary prospectus) included in the Shelf Registration Statement and any amendment
or supplement thereto as such person may reasonably request. The Company consents, subject to the provisions of this Agreement, to the use of the prospectus or any amendment or supplement thereto by each of the selling Holders of the Securities in
connection with the offering and sale of the Securities covered by the prospectus, or any amendment or supplement thereto, included in the Shelf Registration Statement. 

(g) The Company shall cause to be delivered to each Initial Purchaser, any Exchanging Dealer, any Participating
Broker-Dealer and such other persons required to deliver a prospectus following the Registered Exchange Offer, without charge, as many copies of the final prospectus included in the Exchange Offer Registration Statement and any amendment or
supplement thereto as such persons may reasonably request. The Company consents, subject to the provisions of this Agreement, to the use of the prospectus or any amendment or supplement thereto by any Initial Purchaser, if necessary, any
Participating Broker-Dealer and such other persons required to deliver a prospectus following the Registered Exchange Offer in connection with the offering and sale of the Exchange Securities covered by the prospectus, or any amendment or supplement
thereto, included in such Exchange Offer Registration Statement. 
 (h) Prior to any public offering of the
Securities, pursuant to any Registration Statement, the Company shall use its commercially reasonable best efforts to register or qualify or cooperate with the Holders of the Securities included therein and their respective counsel in connection
with the registration or qualification of the Securities for offer and sale under the securities or “blue sky” laws of such states of the United States as any Holder of the Securities reasonably requests in writing and do any and all other
acts or things necessary or advisable to enable the offer and sale in such jurisdictions of the Securities covered by such Registration Statement; provided, however, that the Company shall not be required to (i) qualify generally to do business
in any jurisdiction where it is not then so qualified or (ii) take any action which would subject it to general service of process or to taxation in any jurisdiction where it is not then so subject. 

(i) The Company shall cooperate with the Holders of the Securities to facilitate the timely preparation and delivery
of certificates representing the Securities to be sold pursuant to any Registration Statement free of any restrictive legends and in such denominations and registered in such names as the Holders may request a reasonable period of time prior to
sales of the Securities pursuant to such Registration Statement. 
 (j) Upon the occurrence of any event
contemplated by paragraphs (ii) through (v) of Section 3(b) above during the period for which the Company is required to maintain an effective Registration Statement, the Company shall promptly prepare and file a post-effective
amendment to the Registration Statement or a supplement to the related prospectus and any other required document so that, as thereafter delivered to Holders of the Securities or purchasers of Securities, the prospectus will not contain an untrue
statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading. If the Company notifies the Initial
Purchasers, the Holders of the Securities and any known Participating Broker-Dealer in accordance with paragraphs (ii) through (v) of Section 3(b) above to suspend the use of the prospectus until the requisite changes to the
prospectus have been made, then the Initial Purchasers, the Holders of the Securities and any such Participating Broker-Dealers shall suspend use of such prospectus, and the period of effectiveness of the Shelf Registration Statement provided for in
Section 2(b) above and the Exchange Offer Registration Statement provided for in 

  
 7 

 
Section 1 above shall each be extended by the number of days from and including the date of the giving of such notice to and including the date when the Initial Purchasers, the Holders of
the Securities and any known Participating Broker-Dealer shall have received such amended or supplemented prospectus pursuant to this Section 3(j). During the period during which the Company is required to maintain an effective Shelf
Registration Statement pursuant to this Agreement, the Company will, prior to the three year expiration of that Shelf Registration Statement file, and use its commercially reasonable best efforts to cause to be declared effective (unless it becomes
effective automatically upon filing) within a period that avoids any interruption in the ability of Holders of Securities covered by the expiring Shelf Registration Statement to make registered dispositions, a new registration statement relating to
the Securities, which shall be deemed the “Shelf Registration Statement” for purposes of this Agreement. 
 (k) Not later than the effective date of the applicable Registration Statement, the Company will provide a CUSIP number for the Initial Securities, the Exchange Securities or the Private Exchange
Securities, as the case may be, of each series and provide the applicable trustee with printed certificates for the Initial Securities, the Exchange Securities or the Private Exchange Securities, as the case may be, of each series in a form eligible
for deposit with The Depository Trust Company. 
 (l) The Company will comply in all material respects with
all rules and regulations of the Commission to the extent and so long as they are applicable to the Registered Exchange Offer or the Shelf Registration and will make generally available to its security holders (or otherwise provide in accordance
with Section 11(a) of the Securities Act) an earnings statement satisfying the provisions of Section 11(a) of the Securities Act, no later than 45 days after the end of a 12-month period (or 90 days, if such period is a fiscal year)
beginning with the first month of the Company’s first fiscal quarter commencing after the effective date of the Registration Statement, which statement shall cover such 12-month period. 

(m) The Company shall use its commercially reasonable best efforts to cause the Indenture to be qualified under the
Trust Indenture Act of 1939, as amended, in a timely manner and containing such changes, if any, as shall be necessary for such qualification. In the event that such qualification would require the appointment of a new trustee under the Indenture,
the Company shall appoint a new trustee thereunder pursuant to the applicable provisions of the Indenture. 

(n) The Company may require each Holder of Securities to be sold pursuant to the Shelf Registration Statement to
furnish to the Company such information regarding the Holder and the distribution of the Securities as the Company may from time to time reasonably require for inclusion in the Shelf Registration Statement, and the Company may exclude from such
registration the Securities of any Holder that fails to furnish such information within a reasonable time after receiving such request. 
 (o) The Company shall enter into such customary agreements (including, if requested, an underwriting agreement in customary form) and take all such other action, if any, as any Holder of the
Securities shall reasonably request in order to facilitate the disposition of the Securities pursuant to any Shelf Registration. 
 (p) In the case of any Shelf Registration, the Company shall (i) make reasonably available for inspection by the Holders of the Securities named in the Shelf Registration Statement, any
underwriter participating in any disposition pursuant to the Shelf Registration Statement and any attorney, accountant or other agent retained by the Holders of the Securities named in the Shelf Registration Statement or any such underwriter all
relevant financial and other records, pertinent 

  
 8 

 
corporate documents of the Company and (ii) cause the Company’s officers, directors, employees, accountants and auditors to supply all relevant information reasonably requested by the
Holders of the Securities named in the Shelf Registration Statement or any such underwriter, attorney, accountant or agent in connection with the Shelf Registration Statement, in each case, as shall be reasonably necessary to enable such persons, to
conduct a reasonable investigation within the meaning of Section 11 of the Securities Act; provided, however, that the foregoing inspection and information gathering shall be coordinated on behalf of the Initial Purchasers by you and on behalf
of the other parties, by one counsel designated by and on behalf of such other parties as described in Section 4 hereof. 
 (q) In the case of any Shelf Registration, the Company, if requested by a majority of Holders of Securities covered thereby, shall cause (i) its counsel to deliver customary opinions and updates
thereof relating to the Securities in customary form addressed to such Holders and the managing underwriters, if any, thereof and dated, in the case of the initial opinion, the effective date of such Shelf Registration Statement; (ii) its
officers to execute and deliver all customary documents and certificates and updates thereof requested by any underwriters of the applicable Securities and (iii) its independent public accountants and the independent public accountants with
respect to any other entity for which financial information is provided in the Shelf Registration Statement to provide to the selling Holders of the applicable Securities and any underwriter therefor a comfort letter in customary form and covering
matters of the type customarily covered in comfort letters in connection with primary underwritten offerings, subject to receipt of appropriate documentation as contemplated, and only if permitted, by Statement of Auditing Standards No. 72.

 (r) In the case of the Registered Exchange Offer, if requested by any Initial Purchaser or any known
Participating Broker-Dealer, the Company shall cause (i) its counsel to deliver to such Initial Purchaser or such Participating Broker-Dealer a signed opinion in the form set forth in Section 7(a) of the Purchase Agreement with such
changes as are customary in connection with the preparation of a Registration Statement and (ii) its independent public accountants and the independent public accountants with respect to any other entity for which financial information is
provided in the Registration Statement to deliver to such Initial Purchaser or such Participating Broker-Dealer a comfort letter, in customary form, meeting the requirements as to the substance thereof as set forth in Section 7(c) of the
Purchase Agreement, with appropriate date changes. 
 (s) If a Registered Exchange Offer or a Private
Exchange is to be consummated, upon delivery of the Initial Securities by Holders to the Company (or to such other Person as directed by the Company) in exchange for the Exchange Securities or the Private Exchange Securities, as the case may be, the
Company shall cancel, or cause to be cancelled, the Initial Securities so exchanged for the Exchange Securities or the Private Exchange Securities, as the case may be. 

(t) The Company shall cooperate and assist in any filings required to be made with the Financial Industry Regulatory
Authority, Inc. (“FINRA”) and in the performance of any due diligence investigation by any underwriter (including any “qualified independent underwriter”) that is required to be retained in accordance with the rules and
regulations of FINRA. 
 (u) The Company shall use its commercially reasonable best efforts to take all
other steps necessary to effect the registration of the Securities covered by a Registration Statement contemplated hereby. 

4. Registration Expenses. The Company shall bear all fees and expenses incurred in connection with the performance of its
obligations under Sections 1 through 3 hereof, whether or not the Registered Exchange Offer or a Shelf Registration is filed or becomes effective, and, in the event of a Shelf Registration, shall bear or reimburse the Holders of the Securities
covered thereby for the reasonable fees 

  
 9 

 
and disbursements of one firm of counsel designated by the Holders of a majority in principal amount of the Initial Securities covered thereby to act as counsel for the Holders of the Initial
Securities in connection therewith. 
 5. Indemnification. (a) The Company agrees, jointly and severally, to
indemnify and hold harmless each Holder of the Securities, any Participating Broker-Dealer and each person, if any, who controls such Holder or such Participating Broker-Dealer within the meaning of the Securities Act or the Exchange Act (each
Holder, any Participating Broker-Dealer and such controlling persons are referred to collectively as the “Indemnified Parties”) from and against any losses, claims, damages or liabilities, joint or several, or any actions in respect
thereof (including, but not limited to, any losses, claims, damages, liabilities or actions relating to purchases and sales of the Securities) to which each Indemnified Party may become subject under the Securities Act, the Exchange Act or
otherwise, insofar as such losses, claims, damages, liabilities or actions arise out of or are based upon any untrue statement or alleged untrue statement of a material fact contained in a Registration Statement or prospectus or in any amendment or
supplement thereto or in any preliminary prospectus or “issuer free writing prospectus,” as defined in Commission Rule 433 (“Issuer FWP”), relating to a Shelf Registration, or arise out of, or are based upon, the
omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and shall reimburse, as incurred, the Indemnified Parties for any legal or other expenses
reasonably incurred by them in connection with investigating or defending any such loss, claim, damage, liability or action in respect thereof; provided, however, that the Company shall not be liable in any such case to the extent that such loss,
claim, damage or liability arises out of or is based upon any untrue statement or alleged untrue statement or omission or alleged omission made in a Registration Statement or prospectus or in any amendment or supplement thereto or in any preliminary
prospectus or Issuer FWP relating to a Shelf Registration in reliance upon and in conformity with written information pertaining to such Holder and furnished to the Company by or on behalf of such Holder specifically for inclusion therein; provided
further, however, that this indemnity agreement will be in addition to any liability which the Company may otherwise have to such Indemnified Party. 
 (b) Each Holder of the Securities, severally and not jointly, will indemnify and hold harmless the Company and each person, if any, who controls the Company within the meaning of the Securities Act
or the Exchange Act, from and against any losses, claims, damages or liabilities or any actions in respect thereof, to which the Company or any such controlling person may become subject under the Securities Act, the Exchange Act or otherwise,
insofar as such losses, claims, damages, liabilities or actions arise out of or are based upon any untrue statement or alleged untrue statement of a material fact contained in a Registration Statement or prospectus or in any amendment or supplement
thereto or in any preliminary prospectus or Issuer FWP relating to a Shelf Registration, or arise out of or are based upon the omission or alleged omission to state therein a material fact necessary to make the statements therein not misleading, but
in each case only to the extent that the untrue statement or omission or alleged untrue statement or omission was made in reliance upon and in conformity with written information pertaining to such Holder and furnished to the Company by or on behalf
of such Holder specifically for inclusion therein; and, subject to the limitation set forth immediately preceding this clause, shall reimburse, as incurred, the Company for any legal or other expenses reasonably incurred by the Company or any such
controlling person in connection with investigating or defending any loss, claim, damage, liability or action in respect thereof. This indemnity agreement will be in addition to any liability which such Holder may otherwise have to the Company or
any of its controlling persons. 
 (c) Promptly after receipt by an indemnified party under this Section 5 of notice
of the commencement of any action or proceeding (including a governmental investigation), such indemnified party will, if a claim in respect thereof is to be made against the indemnifying party under this Section 5, notify the indemnifying
party of the commencement thereof; but the failure to notify the indemnifying party shall not relieve the indemnifying party from any liability that it may have under subsection (a) or (b) above except to the extent that it has been
materially prejudiced (through the forfeiture of substantive rights or 

  
 10 

 
defenses) by such failure; and provided further that the failure to notify the indemnifying party shall not relieve it from any liability that it may have to an indemnified party otherwise than
under subsection (a) or (b) above. In case any such action is brought against any indemnified party, and it notifies the indemnifying party of the commencement thereof, the indemnifying party will be entitled to participate therein and, to
the extent that it may wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with one counsel reasonably satisfactory to such indemnified party (who shall not, except with the consent of the indemnified
party, be counsel to the indemnifying party), and after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof the indemnifying party will not be liable to such indemnified party under this
Section 5 for any legal or other expenses, other than reasonable costs of investigation, subsequently incurred by such indemnified party in connection with the defense thereof. Notwithstanding the foregoing, the indemnifying party shall pay as
incurred (or within 30 days of presentation) the reasonable fees and expenses of one counsel (in addition to any local counsel) retained by the indemnified party in the event (i) the indemnifying party and the indemnified party shall have
mutually agreed to the retention of such counsel, (ii) the named parties to any such proceeding (including any impleaded parties) include both the indemnifying party and the indemnified party and, in the opinion of such counsel, representation
of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them, (iii) the indemnifying party shall have failed to assume the defense and employ counsel acceptable to the indemnified party
within a reasonable period of time after notice of commencement of the action or (iv) the indemnified party shall have reasonably concluded that there may be legal defenses available to it that are different from or in addition to those
available to the indemnifying party. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened action in respect of which any indemnified party is or could have been a
party and indemnity could have been sought hereunder by such indemnified party unless such settlement (i) includes an unconditional release of such indemnified party from all liability on any claims that are the subject matter of such action,
and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party. 
 (d) If the indemnification provided for in this Section 5 is unavailable or insufficient to hold harmless an indemnified party under subsections (a) or (b) above, then each
indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages or liabilities (or actions in respect thereof) referred to in subsection (a) or (b) above (i) in
such proportion as is appropriate to reflect the relative benefits received by the indemnifying party or parties on the one hand and the indemnified party on the other from the exchange of the Securities, pursuant to the Registered Exchange Offer,
or (ii) if the allocation provided by the foregoing clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative
fault of the indemnifying party or parties on the one hand and the indemnified party on the other in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities (or actions in respect thereof) as well as
any other relevant equitable considerations. The relative fault of the parties shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a
material fact relates to information supplied by the Company on the one hand or such Holder or such other indemnified party, as the case may be, on the other, and the parties’ relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission. The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first sentence of this subsection (d) shall be deemed to include any legal or
other expenses reasonably incurred by such indemnified party in connection with investigating or defending any action or claim which is the subject of this subsection (d). Notwithstanding any other provision of this Section 5(d), the Holders of
the Securities shall not be required to contribute any amount in excess of the amount by which the net proceeds received by such Holders from the sale of the Securities pursuant to a Registration Statement exceeds the amount of damages which such
Holders have otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within 

  
 11 

 
the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. For purposes of this paragraph
(d), each person, if any, who controls such indemnified party within the meaning of the Securities Act or the Exchange Act shall have the same rights to contribution as such indemnified party and each person, if any, who controls the Company within
the meaning of the Securities Act or the Exchange Act shall have the same rights to contribution as the Company. 
 (e) The
agreements contained in this Section 5 shall survive the sale of the Securities pursuant to a Registration Statement and shall remain in full force and effect, regardless of any termination or cancellation of this Agreement or any investigation
made by or on behalf of any indemnified party. 
 6. Additional Interest Under Certain Circumstances.
(a) Additional interest (the “Additional Interest”) with respect to the Initial Securities shall be assessed as follows if any of the following events occur (each such event in clauses (i) through (iv) below a
“Registration Default”): 
 (i) the Company fails to file any Shelf Registration Statement
required by this Agreement on or prior to the filing deadline; 
 (ii) any Shelf Registration Statement is
not declared effective on or prior to the effectiveness deadline; 
 (iii) the Registered Exchange Offer is not
consummated on or prior to the Consummation Deadline; or 
 (iv) If after either the Exchange Offer
Registration Statement or the Shelf Registration Statement required by this Agreement has been declared effective by the Commission (A) such Registration Statement thereafter ceases to be effective; or (B) such Registration Statement or
the related prospectus ceases to be usable (except as permitted in paragraph (b)) in connection with resales of Transfer Restricted Securities during the periods specified herein because either (1) any event occurs as a result of which the
related prospectus forming part of such Registration Statement would include any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein in the light of the circumstances under which they were
made not misleading, (2) it shall be necessary to amend such Registration Statement or supplement the related prospectus, to comply with the Securities Act or the Exchange Act or the respective rules thereunder, or (3) such Registration
Statement is a Shelf Registration Statement that has expired before a replacement Shelf Registration Statement has become effective. 

Additional Interest shall accrue on the Transfer Restricted Securities affected thereby over and above the interest otherwise payable on such Transfer
Restricted Securities from and including the date on which any such Registration Default shall occur to but excluding the date on which all such Registration Defaults have been cured, at a rate of 0.25% per annum for the first 90-day period
immediately following the occurrence of a Registration Default (provided that the Additional Interest on the Transfer Restricted Securities may not accrue under more than one Registration Default at one time), to be increased by an additional
0.25% per annum with respect to each subsequent 90-day period until all Registration Defaults have been cured, up to a maximum additional interest rate of 1.00% per annum. 

(b) A Registration Default referred to in Section 6(a)(iv)(B) hereof shall be deemed not to have occurred and be continuing in
relation to a Shelf Registration Statement or the related prospectus if (i) such Registration Default has occurred solely as a result of (x) the filing of a post-effective amendment to such Shelf Registration Statement to incorporate
annual audited financial information with respect to the Company where such post-effective amendment is not yet effective and needs to be declared effective to permit Holders to use the related prospectus or (y) other material events, with
respect to the Company that 

  
 12 

 
would need to be described in such Shelf Registration Statement or the related prospectus and (ii) in the case of clause (y), the Company is proceeding promptly and in good faith to amend or
supplement such Shelf Registration Statement and related prospectus to describe such events; provided, however, that in any case if such Registration Default occurs for a continuous period in excess of 30 days, Additional Interest shall be payable
in accordance with the above paragraph from the day such Registration Default occurs until such Registration Default is cured. 

(c) Any amounts of Additional Interest due pursuant to Section 6(a) above will be payable in cash on the regular interest
payment dates with respect to the Transfer Restricted Securities and to the same persons and in the same manner as regular interest. The amount of Additional Interest will be determined by multiplying the applicable Additional Interest rate by the
principal amount of the Transfer Restricted Securities on which it is to be paid, multiplied by a fraction, the numerator of which is the number of days such Additional Interest rate was applicable during such period (determined on the basis of a
360-day year comprised of twelve 30-day months), and the denominator of which is 360. 
 (d) “Transfer Restricted
Securities” means each Security until (i) the date on which such Transfer Restricted Security has been exchanged by a person other than a broker-dealer for a freely transferable Exchange Security in the Registered Exchange Offer,
(ii) following the exchange by a broker-dealer in the Registered Exchange Offer of an Initial Security for an Exchange Security, the date on which such Exchange Security is sold to a purchaser who receives from such broker-dealer on or prior to
the date of such sale a copy of the prospectus contained in the Exchange Offer Registration Statement or (iii) the date on which such Initial Security has been effectively registered under the Securities Act and disposed of in accordance with
the Shelf Registration Statement. 
 7. Rules 144 and 144A. The Company shall use its commercially reasonable
best efforts to file the reports required to be filed by it under the Securities Act and the Exchange Act in a timely manner and, if at any time the Company is not required to file such reports, it will, upon the request of any Holder of Initial
Securities, make publicly available other information so long as necessary to permit sales of their securities pursuant to Rules 144 and 144A. The Company covenants that it will take such further action as any Holder of Initial Securities may
reasonably request, all to the extent required from time to time to enable such Holder to sell Initial Securities without registration under the Securities Act within the limitation of the exemptions provided by Rules 144 and 144A (including
the requirements of Rule 144A(d)(4)). 
 8. Underwritten Registrations. If any of the Transfer Restricted
Securities covered by any Shelf Registration are to be sold in an underwritten offering, the investment banker or investment bankers and manager or managers that will administer the offering (“Managing Underwriters”) will be
selected by the Holders of a majority in aggregate principal amount of such Transfer Restricted Securities to be included in such offering. 
 No person may participate in any underwritten registration hereunder unless such person (i) agrees to sell such person’s Transfer Restricted Securities on the basis reasonably provided in any
underwriting arrangements approved by the persons entitled hereunder to approve such arrangements and (ii) completes and executes all questionnaires, powers of attorney, indemnities, underwriting agreements and other documents reasonably
required under the terms of such underwriting arrangements. 
 9. Miscellaneous. 

(a) Amendments and Waivers. The provisions of this Agreement may not be amended, modified or supplemented, and waivers
or consents to departures from the provisions hereof may not be given, except by the Company and the written consent of the Holders of a majority in principal amount of the Securities affected by such amendment, modification, supplement, waiver or
consents. 

  
 13 

 (b) Notices. All notices and other communications provided for or permitted
hereunder shall be made in writing by hand delivery, first-class mail, facsimile transmission, or air courier which guarantees overnight delivery: 
 (1) if to a Holder of the Securities, at the most current address given by such Holder to the Company. 
 (2) if to the Initial Purchasers; 
 Credit Suisse Securities (USA)
LLC 
 Eleven Madison Avenue 

New York, New York 10010-3629 
 Fax No.: (212) 325-4296 
 Attention: LCD-IBD Group 

and 
 J.P. Morgan Securities LLC 
 383 Madison
Avenue, 27th floor 

New York, New York 10179 
 Attention: Lawrence Landry 
 with a copy (which shall not constitute notice
hereunder) to: 
 Davis Polk & Wardwell LLP 

450 Lexington Avenue 
 New York, NY 10017 
 Attention: Michael Kaplan 

(3) if to the Company, at its address as follows: 

Huntington Ingalls Industries, Inc. 

4101 Washington Avenue 
 Newport News, VA 23607 
 Attention: General Counsel 

with a copy (which shall not constitute notice hereunder) to: 

Gibson, Dunn & Crutcher LLP 

200 Park Avenue 
 New York, NY 10166-0193 
 Attention: Barbara Becker 

All such notices and communications shall be deemed to have been duly given: at the time delivered by hand, if personally delivered;
three business days after being deposited in the mail, postage prepaid, if mailed; when receipt is acknowledged by recipient’s facsimile machine operator, if sent by facsimile transmission; and on the day delivered, if sent by overnight air
courier guaranteeing next day delivery. 

  
 14 

 (c) No Inconsistent Agreements. The Company has not, as of the date hereof,
entered into, nor shall it, on or after the date hereof, enter into, any agreement with respect to its securities that is inconsistent with the rights granted to the Holders herein or otherwise conflicts with the provisions hereof. 

(d) Successors and Assigns. This Agreement shall be binding upon the Company and its successors and assigns. 

(e) Counterparts. This Agreement may be executed in any number of counterparts and by the parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. 
 (f) Headings. The headings in this Agreement are for convenience of reference only and shall not limit or otherwise affect the meaning hereof. 

(g) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS. 
 (h) Severability. If any one or more of the
provisions contained herein, or the application thereof in any circumstance, is held invalid, illegal or unenforceable, the validity, legality and enforceability of any such provision in every other respect and of the remaining provisions contained
herein shall not be affected or impaired thereby. 
 (i) Securities Held by the Company. Whenever the consent
or approval of Holders of a specified percentage of principal amount of Securities is required hereunder, Securities held by the Company or its affiliates (other than subsequent Holders of Securities if such subsequent Holders are deemed to be
affiliates solely by reason of their holdings of such Securities) shall not be counted in determining whether such consent or approval was given by the Holders of such required percentage. 

(j) Entire Agreement. This Agreement constitutes the entire agreement, and supersedes all prior agreements and understandings,
both written and oral, among the parties with respect to the subject matter of this Agreement. 
 (k) Termination. This
Agreement shall automatically terminate on the date, if any, that the Company notifies the Escrow Agent (as defined in the Indenture) in accordance with the terms of the Escrow Agreement (as defined in the Indenture) that the conditions to the
release of the proceeds from escrow will not be satisfied and sends notice of a Special Redemption (as defined in the Indenture). 

  
 15 

 If the foregoing is in accordance with your understanding of our agreement, please sign and return to the
Company a counterpart hereof, whereupon this instrument, along with all counterparts, will become a binding agreement among the several Initial Purchasers and the Company in accordance with its terms. 

Very truly yours, 
  

			
	HUNTINGTON INGALLS INDUSTRIES, INC.
		
	By:	 	/s/ Mark Rabinowitz
		 	 Name: Mark Rabinowitz

Title: Treasurer

  
  

  
 [Signature
Page – Registration Rights Agreement] 

 The foregoing Registration 
 Rights Agreement is hereby confirmed 
 and accepted as of the date first 

above written. 
  

					
	CREDIT SUISSE SECURITIES (USA) LLC
			
		 	By:	 	/s/ Gerald Lodge
		 	 Name: Gerald Lodge

Title: Managing Director

  

					
		 	J.P. MORGAN SECURITIES LLC
			
		 	By:	 	/s/ Peter Nolan
		 	 Name: Peter Nolan

Title: Managing Director

 Acting on behalf of themselves 

	 	and as the Representatives of 

	 	the Several Initial Purchasers 

  
 [Signature
Page – Registration Rights Agreement] 

 ANNEX A 
 Each broker-dealer that receives Exchange Securities for its own account pursuant to the Exchange Offer must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange
Securities. The Letter of Transmittal states that by so acknowledging and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an “underwriter” within the meaning of the Securities Act. This Prospectus, as it
may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of Exchange Securities received in exchange for Initial Securities where such Initial Securities were acquired by such broker-dealer as a
result of market-making activities or other trading activities. The Company has agreed that, for a period of 180 days after the Expiration Date (as defined herein), it will make this Prospectus available to any broker-dealer for use in connection
with any such resale. See “Plan of Distribution.” 

 ANNEX B 
 Each broker-dealer that receives Exchange Securities for its own account in exchange for Securities, where such Initial Securities were acquired by such broker-dealer as a result of market-making
activities or other trading activities, must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Securities. See “Plan of Distribution.” 

 ANNEX C 
 PLAN OF DISTRIBUTION 
 Each broker-dealer that receives
Exchange Securities for its own account pursuant to the Exchange Offer must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Securities. This Prospectus, as it may be amended or supplemented from time to
time, may be used by a broker-dealer in connection with resales of Exchange Securities received in exchange for Initial Securities where such Initial Securities were acquired as a result of market-making activities or other trading activities. The
Company has agreed that, for a period of 180 days after the Expiration Date, it will make this prospectus, as amended or supplemented, available to any broker-dealer for use in connection with any such resale. In addition, until , 20 all dealers
effecting transactions in the Exchange Securities may be required to deliver a prospectus.(1) 

The Company will not receive any proceeds from any sale of Exchange Securities by broker-dealers. Exchange Securities received by
broker-dealers for their own account pursuant to the Exchange Offer may be sold from time to time in one or more transactions in the over-the-counter market, in negotiated transactions, through the writing of options on the Exchange Securities or a
combination of such methods of resale, at market prices prevailing at the time of resale, at prices related to such prevailing market prices or negotiated prices. Any such resale may be made directly to purchasers or to or through brokers or dealers
who may receive compensation in the form of commissions or concessions from any such broker-dealer or the purchasers of any such Exchange Securities. Any broker-dealer that resells Exchange Securities that were received by it for its own account
pursuant to the Exchange Offer and any broker or dealer that participates in a distribution of such Exchange Securities may be deemed to be an “underwriter” within the meaning of the Securities Act and any profit on any such resale of
Exchange Securities and any commission or concessions received by any such persons may be deemed to be underwriting compensation under the Securities Act. The Letter of Transmittal states that, by acknowledging that it will deliver and by delivering
a prospectus, a broker-dealer will not be deemed to admit that it is an “underwriter” within the meaning of the Securities Act. 
 For a period of 180 days after the Expiration Date the Company will promptly send additional copies of this Prospectus and any amendment or supplement to this Prospectus to any broker-dealer that requests
such documents in the Letter of Transmittal. The Company has agreed to pay all expenses incident to the Exchange Offer (including the expenses of one counsel for the Holders of the Securities) other than commissions or concessions of any brokers or
dealers and will indemnify the Holders of the Securities (including any broker-dealers) against certain liabilities, including liabilities under the Securities Act. 
  

 

(1) In addition, the legend required by Item 502(e) of Regulation S-K will appear on the back cover page of
the Exchange Offer prospectus. 

 ANNEX D 

 

	 ̈	CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO.

  

			
	 Name:
	 	
		 	  

	 Address:
	 	
		 	  

		 	
		 	  

 If the undersigned is not a broker-dealer, the undersigned represents that it is not engaged in, and does not intend to
engage in, a distribution of Exchange Securities. If the undersigned is a broker-dealer that will receive Exchange Securities for its own account in exchange for Initial Securities that were acquired as a result of market-making activities or other
trading activities, it acknowledges that it will deliver a prospectus in connection with any resale of such Exchange Securities; however, by so acknowledging and by delivering a prospectus, the undersigned will not be deemed to admit that it is an
“underwriter” within the meaning of the Securities Act.

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