Document:

EX-4.1

 Exhibit 4.1 

ASSUMPTION AND ACCESSION AGREEMENT 
 Date:
November 17, 2014 
 To: Citibank, N.A., as Administrative Agent under the Five Year Senior Unsecured Credit Agreement dated as of June 22, 2012
(as amended, supplemented or otherwise modified through the date hereof, the “Credit Agreement”) among Tyco International Finance S.A., Tyco International Ltd., the Lenders party thereto and Citibank, as Administrative Agent. 

Ladies/Gentlemen: 
 As contemplated by Amendment No. 1,
dated as of November 7, 2014 to the Credit Agreement (the “Amendment”, capitalized terms that are not otherwise defined shall have the meaning given to such terms in the Amendment), upon the Merger, the Irish Parent is to be party to
the Credit Agreement. Accordingly, the Irish Parent acknowledges and agrees as follows: 
 1. Irish Parent acknowledges that, effective upon the Merger, it
will become a party to the Credit Agreement. In furtherance of the foregoing, Irish Parent agrees that, effective upon the Merger, (a) it will have assumed all obligations of Tyco International Ltd. under the Credit Agreement and (b) it
will perform all of the obligations of the “Guarantor” under the Credit Agreement. Without limiting the foregoing, Irish Parent confirms that, upon the effectiveness of the Merger, its guaranty of the obligations of each Borrower set forth
in Article VIII of the Credit Agreement will be effective. 
 [Signatures begin on the following page] 

 
			
	 Very truly yours,

	
	TYCO INTERNATIONAL PLC
	
	         /s/ Andrea Goodrich

	By:	 	Andrea Goodrich
	Title:	 	  Director

 Signature Page to Tyco 

Assumption and Accession AgreementEX-4.2

 Exhibit 4.2 

Execution Version 

TYCO INTERNATIONAL FINANCE S.A. 

TYCO INTERNATIONAL LTD. 

TYCO INTERNATIONAL PLC 

TYCO FIRE & SECURITY FINANCE S.C.A. 

SUPPLEMENTAL INDENTURE 2014-1 TO 2009 INDENTURE 

THIS SUPPLEMENTAL INDENTURE 2014-1 (this “2014 Supplemental Indenture”), dated and effective as of November 17, 2014,
among TYCO INTERNATIONAL FINANCE S.A., a Luxembourg public limited liability company (société anonyme), having its registered office at 29, avenue de la Porte Neuve, L-2227 Luxembourg, and registered with the Luxembourg trade
and companies register under number B 123550 (“TIFSA”), TYCO INTERNATIONAL LTD., a Swiss company (formerly a Bermuda company) (“Tyco Switzerland”), TYCO INTERNATIONAL PLC, an Irish public limited company
(“Tyco Ireland”), TYCO FIRE & SECURITY FINANCE S.C.A., a Luxembourg corporate partnership limited by shares (société en commandite par actions), having its registered office at 29, avenue de la Porte
Neuve, L-2227 Luxembourg, and registered with the Luxembourg trade and companies register under number B 190265 (“Tyco Luxembourg”) and DEUTSCHE BANK TRUST COMPANY AMERICAS, as trustee (the “Trustee”). 

RECITALS 
 A. On
January 9, 2009, TIFSA, Tyco Switzerland and Deutsche Bank Trust Company Americas, as trustee (the “Trustee”) executed an indenture (the “Base Indenture” and, as supplemented and amended, the
“Indenture”) under which TIFSA undertook obligations in its role as the “Company” and Tyco Switzerland undertook obligations in its role as “Parent”. 

B. Tyco Ireland is a wholly-owned subsidiary of Tyco Switzerland and is executing this 2014 Supplemental Indenture to confirm that it has
agreed to issue, and has issued, a Guarantee under the Indenture. 
 C. Tyco Luxembourg is a direct and indirect wholly-owned subsidiary of
Tyco Ireland and is executing this 2014 Supplemental Indenture to confirm that, under the Indenture, it has succeeded to Tyco Switzerland as “Parent” under the Indenture, effective upon the consummation of the sale (the “TIFSA
Sale”) by Tyco Switzerland to Tyco Luxembourg of all of Tyco Switzerland’s equity interests in TIFSA, which equity interests constitute substantially all of Tyco Switzerland’s assets. 

D. After the TIFSA Sale, Tyco Switzerland is expected to merge into Tyco Ireland, with Tyco Ireland surviving as a publicly traded company.

 E. Tyco Switzerland is executing this 2014 Supplemental Indenture to confirm that, effective upon
the TIFSA Sale, it has been discharged from its obligations under the Indenture. 
 F. Section 9.01 of the Indenture provides for the
execution of indentures supplemental to the Base Indenture, without the consent of the Holders, to, among other things: (1) add an additional obligor on the Securities and (2) evidence a succession pursuant to Article X of the Base
Indenture. 
 NOW, THEREFORE, for and in consideration of the foregoing premises, TIFSA, Tyco Switzerland, Tyco Luxembourg, Tyco Ireland and
the Trustee mutually covenant and agree for the equal and proportionate benefit of the respective holders from time to time of the Securities as follows: 

ARTICLE I 

Section 1.1    Succession by Tyco Luxembourg 

Pursuant to Section 10.01 of the Indenture, Tyco Luxembourg hereby: (a) acknowledges and agrees that, effective upon the TIFSA Sale,
it will be the successor entity to Tyco Switzerland under the Indenture, (b) expressly assumes, effective upon the TIFSA Sale, the due and punctual payment of the principal of, premium, if any, and interest on all the Securities or the
obligations under the Guarantees, as the case may be, according to their tenor, and the due and punctual performance and observance of all of the covenants and agreements of the Indenture to be performed or observed by Tyco Switzerland, and
(c) acknowledges and affirms that, immediately after the TIFSA Sale, there shall be no Event of Default and no event that, after notice or lapse of time or both, would become an Event of Default. 

Following the TIFSA Sale, Tyco Luxembourg shall succeed to, and be substituted for, and shall have all obligations and duties of, and may
exercise every right and power of, Parent under the Indenture with the same effect as if Tyco Luxembourg had been named as Parent in the Indenture. 

Section 1.2    Tyco Ireland Guarantee 

At the time of the TIFSA Sale, Tyco Ireland hereby guarantees all covenants and agreements under the Indenture to be performed by Tyco
Luxembourg, in its capacity as successor Parent, including the obligations set forth in Section 15.01 of the Base Indenture with respect to the full and unconditional guarantee of the due and punctual payment of the principal of, premium, if
any, and interest on each Security when the same shall become due and payable, whether at the stated maturity, by acceleration or otherwise, in accordance with the terms of such Security and the Indenture. 

Section 1.3    Discharge of Tyco Switzerland 

Pursuant to Section 10.2 of the Indenture, upon Tyco Luxembourg’s succession pursuant to Section 1.1 of this 2014 Supplemental
Indenture, Tyco Switzerland shall be discharged from all obligations and covenants under the Indenture, the Securities and any Guarantees and may be liquidated or dissolved. 

  
 2 

 Section 1.4    No Default 

Tyco Ireland and Tyco Switzerland each acknowledge and affirm that, immediately after the TIFSA Sale, it shall not be in default in the
performance of any covenant or agreement of the Indenture to be performed or observed by it. 
 ARTICLE II 

MISCELLANEOUS 

Section 2.1    Confirmation of Indenture 

The Indenture, as supplemented and amended by this 2014 Supplemental Indenture, is in all respects ratified and confirmed, and the Indenture,
this 2014 Supplemental Indenture and all indentures supplemental thereto shall be read, taken and construed as one and the same instrument. 

Section 2.2    Concerning the Trustee 

In carrying out the Trustee’s responsibilities hereunder, the Trustee shall have all of the rights, protections and immunities which it
possesses under the Indenture. The Trustee assumes no responsibility for the correctness of the recitals contained herein. The Trustee makes no representations as to the validity or sufficiency of this 2014 Supplemental Indenture. 

Section 2.3    NEW YORK LAW TO GOVERN 

THIS 2014 SUPPLEMENTAL INDENTURE SHALL BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE
CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH STATE, WITHOUT REGARD TO PRINCIPLES OF THE CONFLICT OF LAWS THEREOF. 

Section 2.4    Effectiveness 

Upon the effectiveness of the TIFSA Sale, Tyco Ireland and Tyco Luxembourg shall deliver to the Trustee an Officers’ Certificate
certifying to the effectiveness of the TIFSA Sale. 
 Section 2.5    Counterparts 

This 2014 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. Delivery of an executed counterpart of a signature page to the Indenture by facsimile, email or other electronic means shall be effective as delivery of a manually executed counterpart of the
Indenture. 
 Section 2.6    No Benefit 

  
 3 

 Nothing in this 2014 Supplemental Indenture, express or implied, shall give to any Person other
than the parties hereto and their successors or assigns, and the holders of the Securities, any benefit or legal or equitable rights, remedy or claim under this 2014 Supplemental Indenture or the Indenture. 

  
 4 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture 2014-1 to be duly
executed as of the time, day and year first written above. 
  

			
	TYCO INTERNATIONAL FINANCE S.A.
		
	By:	 	 /s/ Peter Schieser

	Name:	 	Peter Schieser
	Title:	 	Managing Director
	
	TYCO INTERNATIONAL LTD.
		
	By:	 	 /s/ Mark Armstrong

	Name:	 	Mark Armstrong
	Title:	 	Senior Vice President and Treasurer
	
	Executed as a deed by
	 TYCO INTERNATIONAL PLC
 under its
Common Seal

	In the presence of:
		
	By:	 	 /s/ Andrea Goodrich

	Name:	 	Andrea Goodrich
	Title:	 	Director
		
	By:	 	 /s/ Arun Nayar

	Name:	 	Arun Nayar
	Title:	 	Director
	
	TYCO FIRE & SECURITY FINANCE S.C.A.
	
	By: TYCO FIRE & SECURITY S.À R.L., its general partner
		
	By:	 	 /s/ Peter Schieser

	Name:	 	Peter Schieser
	Title:	 	Manager

 [Signature Page to 2009 Supplemental Indenture 2014-1] 

 
			
	DEUTSCHE BANK TRUST COMPANY AMERICAS, Trustee
		
	By:	 	 /s/ Carol Ng

	Name:	 	Carol Ng
	Title:	 	Vice President
		
	By:	 	 /s/ Anthony D’Amato

	Name:	 	Anthony D’Amato
	Title:	 	Associate

 [Signature Page to 2009 Supplemental Indenture 2014-1]

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