EX-4.4



 Exhibit 4.4 

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 2, 2015, among HARRIS CORPORATION (or its permitted
successor), a Delaware corporation (the “Guarantor”), EXELIS INC. (or its permitted successor), an Indiana corporation and a subsidiary of the Guarantor (the “Company”), and MUFG UNION BANK, N.A. (f/k/a Union Bank,
N.A.), as trustee under the Indenture referred to below (the “Trustee”). 
 W I T N E S S E T H 

WHEREAS, the Company and the initial guarantor named therein have heretofore executed and delivered to the Trustee an indenture, dated as of
September 20, 2011 (as amended or supplemented, the “Indenture”) providing for the issuance from time to time of an unlimited amount of senior notes; 

WHEREAS, the Company currently has issued and outstanding under the Indenture $250,000,000 aggregate principal amount of 4.25% senior notes
due October 1, 2016 and $400,000,000 aggregate principal amount of 5.55% senior notes due October 1, 2021 (collectively, the “Notes”, and each a “series of Notes”); 

WHEREAS, pursuant to an underwriting agreement, date as of April 22, 2015, between the Guarantor and Morgan Stanley & Co. LLC
and Citigroup Global Markets Inc., as representatives of the several underwriters named therein, the Guarantor has agreed under certain circumstances to execute and deliver, and to cause the Company to execute and deliver, to the Trustee a
supplemental indenture pursuant to which the Guarantor shall unconditionally guarantee all of the Company’s obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture
without notice to or consent of the Holders of the Notes. 
 NOW THEREFORE, in consideration of the foregoing, the Guarantor, the Company
and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 
 ARTICLE ONE. 

DEFINITIONS 
 SECTION 1.01. Capitalized
Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture or in the securities evidencing the applicable series of Notes. 

ARTICLE TWO. 
 NOTE GUARANTEE 

SECTION 2.01. Guarantee. 
 (a) The
Guarantor, as primary obligor and not merely as surety hereby unconditionally guarantees, on an unsecured senior basis, to each Holder of the Notes authenticated and delivered by the Trustee and to the Trustee and its successors and assigns with
respect to each such series of Notes, that: 

  
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 (1) the principal of, premium, if any, and interest on such series of Notes will
be promptly paid in full when due, whether at maturity, by acceleration, redemption or otherwise, and interest on the overdue principal of and interest on such series of Notes, if any, if lawful, and all other obligations of the Company to such
Holders or the Trustee hereunder or under the Indenture will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and 

(2) in case of any extension of time of payment or renewal of any such series of Notes or any of such other obligations, that
the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise (all obligations guaranteed hereby, herein called the “Guaranteed
Obligations”). 
 Failing payment when due of any amount so guaranteed for whatever reason, the Guarantor will be obligated to pay
the same immediately. The Guarantor agrees that this is a guarantee of payment and not a guarantee of collection. 
 (b) The Guarantor
hereby waives 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 this Note Guarantee will not be discharged with respect to a series of Notes except by (i) the payment in full of the Guaranteed Obligations with respect to such series of Notes or (ii) as otherwise set forth in
Section 2.05 hereof. 
 (c) If any Holder or the Trustee is required by any court or otherwise to return to the Company, the Guarantor
or any custodian, trustee, liquidator or other similar official acting in relation to either the Company or the Guarantor, any amount paid by either to the Trustee or such Holder, this Note Guarantee, to the extent theretofore discharged, will be
reinstated in full force and effect. 
 (d) The Guarantor agrees that it will not be entitled to any right of subrogation in relation to the
Holders in respect of any obligations guaranteed hereby until payment in full of all obligations guaranteed hereby. The Guarantor further agrees that, as between the Guarantor, on the one hand, and the Holders and the Trustee, on the other hand,
(1) the maturity of the obligations guaranteed hereby may be accelerated as provided in Article 5 of the Indenture for the purposes of this Note Guarantee, notwithstanding any stay, injunction or other prohibition preventing such acceleration
in respect of the obligations guaranteed hereby, and (2) in the event of any declaration of acceleration of such obligations as provided in Article 5 of the Indenture, such obligations (whether or not due and payable) will forthwith become due
and payable by the Guarantor for the purpose of this Note Guarantee, in each case, with respect to the applicable series of Notes so accelerated. The Guarantor will have the right to seek contribution from any non-paying guarantor (if any) so long
as the exercise of such right does not impair the rights of the Holders under this Note Guarantee. 

  
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 SECTION 2.02. Limitation on Guarantor Liability. 

Notwithstanding any term of this Note Guarantee or the Indenture to the contrary, the obligations of the Guarantor will be limited to the
maximum amount that will not, after giving effect to such maximum amount and all other contingent and fixed liabilities of the Guarantor that are relevant under law, and after giving effect to any collections from, rights to receive contribution
from or payments made by or on behalf of any other guarantor in respect of the obligations of such other guarantor (if any), render this Notes Guarantee voidable under applicable law relating to fraudulent conveyance or fraudulent transfer or
similar laws affecting the rights of creditors generally. 
 SECTION 2.03. Execution and Delivery of Note Guarantee. 

The execution by the Guarantor of this Supplemental Indenture evidences the Note Guarantee of the Guarantor, whether or not the person signing
as an officer of the Guarantor still holds that office at the time of authentication of any Note. The delivery of any Note by the Trustee after authentication constitutes due delivery of the Note Guarantee set forth in this Supplemental Indenture on
behalf of the Guarantor. 
 The Guarantor hereby agrees that its Note Guarantee set forth in Section 2.01 hereof will remain in full
force and effect notwithstanding any failure to endorse on each Note a notation of such Note Guarantee. 
 SECTION 2.04. Guarantor May Consolidate, etc.,
on Certain Terms. 
 (a) The Guarantor may not in a single transaction or series of related transactions, consolidate or merge with or
into any other person, or sell or transfer all or substantially all of its property and assets to any other person, other than the Company, unless (a) the person formed by or resulting from any such consolidation or merger, or which shall have
received the transfer of all or substantially all of the property and assets of the Guarantor, is or becomes a guarantor of the Notes on substantially the same terms as are provided for herein or shall assume the due and punctual performance and
observance of all of the covenants and conditions to be performed or observed by the Guarantor hereunder and under the Indenture and (b) the Guarantor, such person or such successor person, as the case may be, shall not, immediately after such
consolidation, merger, sale or transfer, be in default in the performance of any such covenant or condition. 
 (b) Subject to the
provisions of Section 2.04(a), nothing in this Supplemental Indenture or the Indenture shall prevent any consolidation or merger of the Guarantor with or into any other person, or any sale, or transfer of all or substantially all of the
property and assets of the Guarantor to any other person lawfully entitled to acquire the same; provided, however, that the Guarantor covenants and agrees, that any such consolidation, merger, sale, or transfer (other than with or to the Company or
another guarantor) shall be upon the condition that the due and punctual payment of the guaranteed principal, premium, if any, and interest of all the Notes according to their tenor, and the due and punctual performance and observance of all the
terms, covenants and conditions of this Supplemental Indenture and the Indenture to be kept or performed by the Guarantor shall, by an indenture supplemental hereto, executed and delivered to the Trustee, be assumed by the person formed by or
resulting from any such consolidation or 

  
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 merger (provided that no such supplemental indenture shall be required if the Guarantor is the surviving person
upon the consolidation or merger), or which shall have received the transfer of all or substantially all of the property and assets of the Guarantor. Every such successor person upon executing an indenture supplemental hereto, as provided in this
Section 2.04(b), in either substantially the same form as this Supplemental Indenture or in another form reasonably satisfactory to the Trustee, shall succeed to and be substituted for the Guarantor with the same effect as if it had been named
herein as the “Guarantor.” 
 (c) In the event of any such sale or transfer (other than a transfer by way of lease), the Guarantor
or any successor person which shall theretofore have become such in the manner described in this Section shall be discharged from all obligations and covenants under this Supplemental Indenture, the Indenture and the Note Guarantees. 

(d) Subject to the provisions of Section 6.01 of the Indenture, the Trustee shall receive an Opinion of Counsel (subject to customary
exceptions and exclusions) as conclusive evidence that any such merger, consolidation, sale or transfer or any such supplemental indenture complies with the foregoing conditions and provisions of this Section 2.04. 

SECTION 2.05. Releases. 
 The Note
Guarantee of the Guarantor will be automatically released and discharged with respect to any series of Notes: 
 (a) in
connection with any sale or other disposition of all of the assets of the Guarantor (including by way of merger, consolidation or otherwise) to a person that is not (either before or after giving effect to such transaction) the Company or a
subsidiary of the Company; provided that the requirements set forth in Section 2.04 hereto are satisfied; 
 (b) if the
Holders of a majority in aggregate principal amount of such series of Notes consent to such release, in accordance Article 9 of the Indenture; 

(c) if the Company merges with and into the Guarantor; 

(d) the Guarantor merges with and into the Company or any person that is or becomes a guarantor of the Notes; provided that the
requirements set forth in Section 2.04 hereto are satisfied; or 
 (e) upon the payment in full of the Guaranteed
Obligations with respect to such series of Notes. 
 In connection with any release of the Guarantor’s obligations under its Note
Guarantee pursuant to clause (a) above upon delivery by the Company to the Trustee of an Opinion of Counsel and an Officers’ Certificate to the effect that such release was made in accordance with the provisions of the Indenture, the
Trustee will execute any documents reasonably required by the Company or the Guarantor in order to evidence the release of the Guarantor from its obligations under its Note Guarantee. The Company shall give the Holders of the Notes prompt notice of
any such release. 

  
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 Until such time as the Guarantor is released from its obligations under its Note Guarantee in
respect of the applicable series of Notes as provided in this Section 2.05, the Guarantor will remain liable for the Guaranteed Obligations with respect to such series of Notes. 

SECTION 2.06. Notices. Notice to the Guarantor shall be sufficient if addressed to the Guarantor in care of the Company at the address, place and
manner provided in Section 1.05 of the Indenture. 
 SECTION 2.07. Event of Default. The following Event of Default shall be added to the
Indenture as Section 5.01(i): 
 “(i) any Guaranteeing Subsidiary repudiates its obligations under its Note Guarantee or, except
as permitted by the Supplemental Indenture providing for such Note Guarantee, such Note Guarantee is determined to be unenforceable or invalid or shall for any reason cease to be in full force and effect.” 

The term “default”, as defined in Section 6.02 of the Indenture, shall be deemed to include a reference to
Section 5.01(i). 
 ARTICLE THREE. 

MISCELLANEOUS 
 SECTION 3.01. Successors and
Assigns of the Company and the Guarantor. All the covenants, stipulations, promises and agreements contained in this Supplemental Indenture by or in behalf of the Company and the Guarantor shall bind their respective successors and assigns,
whether so expressed or not. 
 SECTION 3.02. Provisions of Trust Indenture Act of 1939 to Control. If and to the extent that any provision of this
Supplemental Indenture limits, qualifies or conflicts with a provision of the Trust Indenture Act of 1939 that is required under such Act to be a part of and govern this Supplemental Indenture, the latter provision shall control. If any provision of
this Supplemental Indenture modifies or excludes any provision of the Trust Indenture Act of 1939 that may be so modified or excluded, the latter provision shall be deemed to apply to this Supplemental Indenture as so modified or to be excluded, as
the case may be. 
 SECTION 3.03. Effect of Invalidity of Provisions. In case any one or more of the provisions contained in this Supplemental
Indenture or in the Note Guarantee shall for any reason be held to be invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect any other provisions of this Supplemental Indenture or of such
Note Guarantee, but this Supplemental Indenture and such Note Guarantee shall be construed as if such invalid or illegal or unenforceable provision had never been contained herein or therein. 

SECTION 3.04. Supplemental Indenture and Note Guarantee to Be Construed in Accordance with New York Law. This Supplemental Indenture and the Note
Guarantee shall be construed in accordance with and governed by the laws of the State of New York, without regard to conflict of law principles. 

  
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 SECTION 3.05. Supplemental Indenture May Be Executed in Counterparts. This Supplemental Indenture may be
executed in any number of counterparts, each of which shall be an original; but such counterparts shall together constitute but one and the same instrument. 

SECTION 3.06. Headings. The headings of the Articles and Sections of this Supplemental Indenture have been inserted for convenience of reference only,
are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof. 
 SECTION 3.07. Recitals by
Company and Guaranteeing Subsidiary. The recitals in this Supplemental Indenture are made by the Company and the Guarantor only and not by the Trustee, all of the provisions contained in the Indenture in respect of the rights, privileges,
indemnities, immunities, powers and duties of the Trustee shall be applicable in respect of this Supplemental Indenture and the Note Guarantee as fully and with like effect as if set forth herein in full and the Trustee shall not be responsible for
the validity or sufficiency of this Supplemental Indenture or the Note Guarantee. 

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

			
	Exelis Inc.
		
	By:		 /s/ Janet L. McGregor

			Name: Janet L. McGregor
			Title: Corporate Vice President, Treasurer and Assistant Secretary



  
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	Harris Corporation, as the Guarantor
		
	By:		 /s/ Miguel A. Lopez

			Name:		Miguel A. Lopez
			Title:		Senior Vice President and Chief Financial Officer



  
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	MUFG Union Bank, N.A., as Trustee
		
	By:		 /s/ Fernando Moreya

			Name:		Fernando Moreya
			Title:		Vice President



  
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