Document:

EX-4.3

 Exhibit 4.3 

Execution Version 

SECOND SUPPLEMENTAL INDENTURE 

This Second Supplemental Indenture, dated as of July 1, 2014 (this “Supplemental Indenture”), among Tango Merger Sub 2
LLC, a Delaware limited liability company (the “Company”), as successor in interest to Forest Laboratories, Inc., a Delaware corporation (“Forest Labs”), and Wells Fargo Bank, National Association, as Trustee (the
“Trustee”) under the Indenture referred to below. 
 W I T N E S S E T H: 

WHEREAS, Forest Labs and the Trustee have heretofore executed and delivered an indenture dated as of January 31, 2014 (the
“Indenture”), providing for the issuance of 4.875% Senior Notes due 2021 of Forest Labs (the “Notes”); 

WHEREAS, on February 17, 2014, Actavis plc, an Irish public limited company (“Parent”), entered into a merger agreement
(the “Merger Agreement”), by and among Parent, the Company, Forest Labs and various other subsidiaries of Parent, pursuant to which, Parent will indirectly acquire the equity interests of Forest Labs by way of a merger of Forest
Labs with and into the Company, with the Company being the surviving entity and continuing its existence under Delaware law; 
 WHEREAS,
Section 5.01 (Consolidation, Merger and Conveyance, Transfer and Lease of Assets) of the Indenture provides, among other things, that Forest Labs will not be prevented from merging with or into the Company; provided that, among
other things, the Company expressly assumes all of the obligations of Forest Labs with respect to the Notes and the Indenture and the Notes pursuant to a supplemental indenture; and 

WHEREAS, pursuant to Section 9.01(a) (Without Consent of Holders) of the Indenture, the Trustee is authorized to execute and
deliver this Supplemental Indenture which evidences the assumption by the Company of the obligations under the Indenture and Notes of Forest Labs. 

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged,
the Company and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 
 ARTICLE
I 
 SECTION 1.1. Defined Terms. As used in this Supplemental Indenture, terms defined in the Indenture or in the preamble or recital
hereto are used herein as therein defined, and that the term “Holders” in this Supplemental Indenture shall refer to the term “Holders” as defined in the Indenture and the Trustee acting on behalf or for the benefit of such
Holders. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Supplemental Indenture refer to this Supplemental Indenture as a whole and not to any particular section hereof. 

  
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 ARTICLE II 

SECTION 2.1. Assumption by the Company and Agreement to be Bound. In accordance with Section 5.01 and
Section 9.01 of the Indenture, the Company hereby expressly assumes all of the obligations of Forest Labs under the Indenture and the Notes. The Company shall succeed to and be bound by all covenants, agreements, representations,
warranties and acknowledgments attributable to Forest Labs and may exercise every right and power of Forest Labs under the Indenture and the Notes. 

ARTICLE III 
 SECTION 3.1.
Notices. All notices and other communications to the Company shall be given as provided in the Indenture to the Company, at the address set forth below. 

Actavis plc 
 Morris Corporate
Center III 
 400 Interpace Parkway 

Parsippany, New Jersey 07054 

Attention: Stephen Kaufhold, Senior Vice President, Treasurer 

SECTION 3.2. Parties. Nothing expressed or mentioned herein is intended or shall be construed to give any Person, firm or corporation,
other than the Holders and the Trustee, any legal or equitable right, remedy or claim under or in respect of this Supplemental Indenture or the Indenture or any provision herein or therein contained. 

SECTION 3.3. Governing Law. This Supplemental Indenture shall be governed by, and construed in accordance with, the laws of the State
of New York. 
 SECTION 3.4. Severability Clause. In case any provision in this Supplemental Indenture shall be invalid, illegal or
unenforceable in any jurisdiction shall, as to such jurisdiction be ineffective to the extent of such invalidity, illegality or unenforceability without affecting the validity, legality and enforceability of the remaining provisions; and the
invalidity of a particular provision in a particular jurisdiction shall not invalidate such provision in any other jurisdiction. 
 SECTION
3.5. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended or supplemented hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall
remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. This Supplemental Indenture is an
indenture supplemental to the Indenture, and the Indenture and this Supplemental Indenture shall henceforth be read and construed together for all purposes. In the event of a conflict between the terms and conditions of the Indenture and the terms
and conditions of this Supplemental Indenture, then the terms and conditions of this Supplemental Indenture shall prevail. The Trustee makes no representation or warranty as to the validity or sufficiency of this Supplemental Indenture. 

SECTION 3.6. Counterparts. This Supplemental Indenture may be executed by one or more of the parties to this Supplemental Indenture on
any number of separate counterparts, and all of said counterparts taken together shall be deemed to constitute one and the 

  
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same instrument. Delivery of an executed counterpart of this Supplemental Indenture by facsimile transmission or other electronic format shall be effective as delivery of a manually executed
counterpart hereof. 
 SECTION 3.7. Headings. The headings of the Articles and the Sections in this Supplemental Indenture are for
convenience of reference only, are not part of this Supplemental Indenture and shall not be deemed to alter or affect the meaning or interpretation of any provisions hereof. 

SECTION 3.8. Recitals. The recitals contained herein are those of the Company and not the Trustee, and the Trustee assumes no
responsibility for the correctness of same. All rights, protections, privileges, indemnities and benefits granted or afforded to the Trustee under the Indenture shall be deemed incorporated herein by this reference and shall be deemed applicable to
all actions taken, suffered or omitted by the Trustee under this Supplemental Indenture. 
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blank] 

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

			
	TANGO MERGER SUB 2 LLC
		
	By:	 	 /s/ David A. Buchen

	Name:	 	David A. Buchen
	Title:	 	Chief Legal Officer – Global
	
	 WELLS FARGO BANK, NATIONAL

ASSOCIATION, as Trustee

		
	By:	 	 /s/ Yana Kislenko

	Name:	 	Yana Kislenko
	Title:	 	Vice President

 Signature Page to Assumption Supplemental Indenture (4.875%)EX-4.4

 Exhibit 4.4 

Execution Version 

THIRD SUPPLEMENTAL INDENTURE 

This Third Supplemental Indenture, dated as of July 1, 2014 (this “Supplemental Indenture”), among Actavis plc (the
“Parent Guarantor”), Tango Merger Sub 2 LLC (the “Company”), as successor in interest to Forest Laboratories, Inc. (“Forest Labs”), and Wells Fargo Bank, National Association, as Trustee (the
“Trustee”) under the Indenture referred to below. 
 W I T N E S S E T H: 

WHEREAS, Forest Labs and the Trustee have heretofore executed and delivered an indenture dated as of December 10, 2013 (the
“Original Indenture”), as supplemented on the date hereof to provide for the assumption by the Company of all of Forest Labs’s obligations with respect to the Notes and the Original Indenture (as amended, supplemented, waived
or otherwise modified, the “Indenture”), providing for the issuance of 5.00% Senior Notes due 2021 of the Company (the “Notes”); 

WHEREAS, Forest Labs successfully solicited consents from a majority of the Holders to, among other things, amend (i) that certain
Registration Rights Agreement, dated December 10, 2013 (the “Registration Rights Agreement”), between Forest Labs and Morgan Stanley & Co. LLC, as representative of the several initial purchasers, providing for
registration rights with respect to the Notes and (ii) the Indenture to make conforming changes including the removal of references to the Registration Rights Agreement and the removal of the ability of the Notes to accrue Additional Interest
pursuant to the Registration Rights Agreement; 
 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee, the Parent
Guarantor and the Company are authorized to execute and deliver this Supplemental Indenture, without the consent of any Holder, to amend or supplement the Indenture to add a Guarantee by the Parent Guarantor of the Notes. 

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged,
the Parent 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 I 
 SECTION 1.1
Defined Terms. As used in this Supplemental Indenture, terms defined in the Indenture or in the preamble or recital hereto are used herein as therein defined, except as set forth below in Section 1.2 hereof and that the term
“Holders” in this Supplemental Indenture shall refer to the term “Holders” as defined in the Indenture and the Trustee acting on behalf or for the benefit of such Holders. The words “herein,” “hereof” and
“hereby” and other words of similar import used in this Supplemental Indenture refer to this Supplemental Indenture as a whole and not to any particular section hereof. 

 SECTION 1.2 Amendments to Defined Terms. 

a. The definition of “Guarantor” in Section 1.01 of the Indenture is hereby amended and restated in its entirety
as follows: 
 “ “Guarantor” means (i) any Subsidiary of the Company that executes a Note Guarantee in accordance
with the provisions of this Indenture and its respective successors and (ii) the Parent Guarantor so long as the Parent Guarantor Guarantees the Notes in accordance with the provisions of this Indenture and its respective successors.”.

 b. The definition of “Note Guarantee” in Section 1.01 of the Indenture is hereby amended and restated in
its entirety as follows: 
 “ “Note Guarantee” means (i) means any Guarantee that may from time to time be
entered into by a Subsidiary of the Company after the Issue Date pursuant to Section 4.11 or (ii) the Guarantee of the Notes by the Parent Guarantor by which the Parent Guarantor agrees to be a Guarantor under this Indenture and be bound
by the terms of this Indenture applicable to Guarantors, including, but not limited to, Article 10.”. 
 c.
Section 1.01 of the Indenture is hereby amended by inserting the following text after the definition of “Opinion of Counsel”, but before the definition of “Permitted Bank Indebtedness”: 

“ “Parent Guarantor” means Actavis plc, an Irish public limited company.”. 

ARTICLE II 
 SECTION 2.1
Agreement to be Bound. The Parent Guarantor hereby becomes a party to the Indenture as a Guarantor and as such shall have all of the rights and be subject to all of the obligations and agreements of a Guarantor under the Indenture. The Parent
Guarantor agrees to be bound by all of the provisions of the Indenture applicable to a Guarantor and to perform all of the obligations and agreements of a Guarantor under the Indenture. 

SECTION 2.2 Guarantee. The Parent Guarantor agrees to fully, unconditionally and irrevocably Guarantee to each Holder of the Notes and
the Trustee the obligations of the Company under the Indenture and the Notes as provided in Article 10 of the Indenture. 

SECTION 2.3 Conforming Amendments. 
  

	 	a.	Section 6.01(g) of the Indenture is hereby amended and restated in its entirety as follows: 

“except as permitted in this Indenture, any Note Guarantee of any Significant Subsidiary or the Guarantee of the Notes by the Parent
Guarantor shall for any reason cease to be, or it shall be asserted by any Guarantor or the Company not to be, in full force and effect and enforceable in accordance with its terms;”. 

  
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	 	b.	Section 10.06(a)(1)(A) of the Indenture is hereby amended and restated in its entirety as follows: 

“(A) concurrently with any direct or indirect sale, issuance, exchange, disposition, conveyance or transfer (by merger or otherwise) of
any Equity Interests of a Guarantor that is a Subsidiary of the Company following which such Guarantor is no longer a Subsidiary of the Company, or of all or substantially all the assets of such Guarantor (determined on a consolidated basis for such
Guarantor and its Subsidiaries), in accordance with the applicable provisions of the Indenture following which such Guarantor is no longer a Subsidiary of the Company;”. 
  

	 	c.	Section 10.06(a)(1)(B) of the Indenture is hereby amended and restated in its entirety as follows: 

“(B) upon the election of the Company if immediately after the release of such Note Guarantee, the Company would be in compliance
with the covenant described under Section 4.06 (other than as result of a release or discharge of a Guarantee provided by such Guarantor upon a payment under such Guarantee) as specified in an Officers’ Certificate; provided,
however, that this Section 10.06(a)(1)(B) shall not apply to the Note Guarantee of the Parent Guarantor;”. 
 ARTICLE
III 
 SECTION 3.1 Notices. All notices and other communications to the Parent Guarantor shall be given as provided in the Indenture
to the Parent Guarantor, at its address set forth below, with a copy to the Company as provided in the Indenture for notices to the Company. 

Actavis plc 
 Morris Corporate
Center III 
 400 Interpace Parkway 

Parsippany, New Jersey 07054 

Attention: Stephen Kaufhold, Senior Vice President, Treasurer 

SECTION 3.2 Parties. Nothing expressed or mentioned herein is intended or shall be construed to give any Person, firm or corporation,
other than the Holders and the Trustee, any legal or equitable right, remedy or claim under or in respect of this Supplemental Indenture or the Indenture or any provision herein or therein contained. 

SECTION 3.3 Governing Law. This Supplemental Indenture shall be governed by, and construed in accordance with, the laws of the State of
New York. 
 SECTION 3.4 Severability Clause. In case any provision in this Supplemental Indenture shall be invalid, illegal or
unenforceable in any jurisdiction shall, as to such jurisdiction be ineffective to the extent of such invalidity, illegality or unenforceability without affecting the validity, legality and enforceability of the remaining provisions; and the
invalidity of a particular provision in a particular jurisdiction shall not invalidate such provision in any other jurisdiction. 

  
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 SECTION 3.5 Ratification of Indenture; Supplemental Indentures Part of Indenture. Except
as expressly amended or supplemented hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the
Original Indenture for all purposes, and every Holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. This Supplemental Indenture is an indenture supplemental to the Original Indenture, and the Original Indenture
and this Supplemental Indenture shall henceforth be read and construed together for all purposes. In the event of a conflict between the terms and conditions of the Indenture and the terms and conditions of this Supplemental Indenture, then the
terms and conditions of this Supplemental Indenture shall prevail. The Trustee makes no representation or warranty as to the validity or sufficiency of this Supplemental Indenture. 

SECTION 3.6 Counterparts. This Supplemental Indenture may be executed by one or more of the parties to this Supplemental Indenture on
any number of separate counterparts, and all of said counterparts taken together shall be deemed to constitute one and the same instrument. Delivery of an executed counterpart of this Supplemental Indenture by facsimile transmission or other
electronic format shall be effective as delivery of a manually executed counterpart hereof. 
 SECTION 3.7 Headings. The headings of
the Articles and the Sections in this Supplemental Indenture are for convenience of reference only, are not part of this Supplemental Indenture and shall not be deemed to alter or affect the meaning or interpretation of any provisions hereof. 

SECTION 3.8 Recitals. The recitals contained herein are those of the Company and not the Trustee, and the Trustee assumes no
responsibility for the correctness of same. All rights, protections, privileges, indemnities and benefits granted or afforded to the Trustee under the Indenture shall be deemed incorporated herein by this reference and shall be deemed applicable to
all actions taken, suffered or omitted by the Trustee under this Supplemental Indenture. 
 [Remainder of page intentionally left
blank] 

  
 4 

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

			
	ACTAVIS PLC, as a Guarantor
		
	By:	 	 /s/ David A. Buchen

		 	Name: David A. Buchen
		 	  Title: Chief Legal Officer – Global

 
			
	WELLS FARGO BANK,
	NATIONAL ASSOCIATION, as Trustee
		
	By:	 	 /s/ Yana Kislenko

		 	Name: Yana Kislenko
		 	  Title: Vice President

 
			
	 TANGO MERGER SUB 2 LLC,
 as the
Company

		
	By:	 	 /s/ David A. Buchen

		 	Name: David A. Buchen
		 	  Title: Chief Legal Officer – Global

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