Document:

EX-4.2

 Exhibit 4.2 

EXECUTION VERSION 
 FIRST
SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of November 16, 2020, among Utah Acquisition Sub Inc., a Delaware corporation (“Acquisition Sub”), Mylan II B.V., a private limited liability
company incorporated and existing under the laws of the Netherlands (“Mylan II B.V.”), Mylan Inc., a Pennsylvania corporation (“Mylan Inc.” and, together with Acquisition Sub and Mylan II B.V., the
“Guaranteeing Subsidiaries”), Viatris Inc., a Delaware corporation, Upjohn Finance B.V., a private limited liability company (besloten vennootschap met beperkte aansprakelijkheid) incorporated and existing under the laws of
the Netherlands (the “Issuer”) and Citibank, N.A., London Branch, as trustee under the Indenture referred to below (the “Trustee”). 

W I T N E S E T H 

WHEREAS, the Issuer has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of
June 23, 2020 providing for the issuance of 0.816% Senior Notes due 2022, 1.023% Senior Notes due 2024, 1.362% Senior Notes due 2027 and 1.908% Senior Notes due 2032 (collectively, the “Notes”); 

WHEREAS, the Indenture provides that under certain circumstances each of the Mylan Guarantors shall execute and deliver to the Trustee one or
more supplemental indentures pursuant to which the Mylan Guarantors shall unconditionally guarantee the Issuer’s Indenture Obligations on the terms and conditions set forth herein (the “Note Guarantee”); 

WHEREAS, Upjohn Inc. has changed its name from “Upjohn Inc.” to “Viatris Inc.”, and all references to “Upjohn
Inc.” in the Indenture and the Notes are deemed to be references to Viatris Inc.; and 
 WHEREAS, pursuant to Section 8.01 of the
Indenture, the parties hereto are authorized to execute and deliver this Supplemental Indenture. 
 NOW, THEREFORE, in consideration of the
foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 

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

2. AGREEMENT TO GUARANTEE. Each Guaranteeing Subsidiary hereby provides an unconditional Guarantee on the terms and subject to the conditions
set forth in the Guarantee and in the Indenture including but not limited to Article X thereof. 
 3. NO RECOURSE AGAINST OTHERS. No past,
present or future director, member, partner, officer, employee or equityholder of the Issuer or any of the Guarantors will have any liability for any of the Issuer’s or such Guarantor’s obligations under the Notes, the Indenture, the Note
Guarantee or for any claim based on, in respect of, or by reason of, such obligations or their creation (other than the Guarantors in respect of their respective Guarantees and the Company in respect of the Notes). Each Holder of Notes by accepting
a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes and the Note Guarantees. 

4. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK (INCLUDING, WITHOUT LIMITATION, SECTION
5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW OR ANY SUCCESSOR TO SUCH STATUTE) WILL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF
LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

 5. COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture by
manual, facsimile or electronic signature. Each signed copy shall be an original, but all of them together represent the same agreement. Signatures of the parties hereto transmitted by facsimile or electronic formation (i.e., “pdf” or
“tif”) shall be deemed to be their original signatures for all purposes. 
 6. EFFECT OF HEADINGS. The Section headings herein are
for convenience only and shall not affect the construction hereof. 
 7. THE TRUSTEE. The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiaries and the Issuer. In entering into
this Supplemental Indenture, the Trustee shall be entitled to the benefit of every provision of the Indenture relating to the conduct of or affecting the liability of or affording protection to the Trustee. 

8. RATIFICATION OF THE INDENTURE; SUPPLEMENTAL INDENTURE PART OF THE INDENTURE. Except as expressly amended hereby, the Indenture is in all
respects ratified and confirmed and all the terms, conditions and provisions thereof, including, without limitation, Section 7.06 thereof, shall remain in full force and effect. This First Supplemental Indenture shall form a part of the
Indenture for all purposes, and every Holder of the Notes shall be bound hereby. 
 9. APPOINTMENT OF AGENT FOR SERVICE. Mylan II B.V. hereby
irrevocably appoints Corporation Service Company, with offices at 19 West 44th Street, Suite 200, New York, NY 10036, as its agent for service of process in any related proceeding and agrees that service of process in any such related proceeding may
be made upon it at the office of such agent. Mylan II B.V. waives, to the fullest extent permitted by law, any other requirements of or objections to personal jurisdiction with respect thereto. Mylan II B.V. represents and warrants that such agent
has agreed to act as its agent for service of process, and Mylan II B.V. agrees to take any and all action, including the filing of any and all documents and instruments, that may be necessary to continue such appointment in full force and effect.

 10. ELECTRONIC DELIVERY. The parties acknowledge and agree that they may execute this Supplemental Indenture, and any variation or
amendment to the same, and all documents required to be delivered in connection with this Supplemental Indenture, by electronic instrument. The parties agree that the electronic signatures appearing on this Supplemental Indenture and on all
documents required to be delivered in connection with this Supplemental Indenture shall have the same effect as handwritten signatures and the use of an electronic signature on this Supplemental Indenture and on all documents required to be
delivered in connection with the Supplemental Indenture shall have the same validity and legal effect as the use of a signature affixed by hand and is made with the intention of authenticating this Supplemental Indenture and on all documents
required to be delivered in connection with the Supplemental Indenture, and evidencing the parties’ intention to be bound by the terms and conditions contained herein. For the purposes of using an electronic signature, the parties authorize
each other to the lawful processing of personal data of the signers for contract performance and their legitimate interests including contract management. 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed and attested, all as of the date first above written. 
 Dated: November 16, 2020 

 

			
	UTAH ACQUISITION SUB, INC.
		
	By:	 	 /s/ Sanjeev Narula

		 	Name: Sanjeev Narula
		 	Title: Authorized Officer
	
	MYLAN II B.V.
		
	By:	 	 /s/ Thomas Salus

		 	Name: Thomas Salus
		 	Title: Director
	
	MYLAN INC.
		
	By:	 	 /s/ John Miraglia

		 	Name: John Miraglia
		 	Title: Treasurer
	
	UPJOHN FINANCE B.V.
		
	By:	 	 /s/ Martin Westra

		 	Name: Martin Westra
		 	Title: Director
	
	VIATRIS INC.
		
	By:	 	 /s/ Sanjeev Narula

		 	Name: Sanjeev Narula
		 	Title: Authorized Officer
	
	 CITIBANK, N.A., LONDON BRANCH,
 as
Trustee

		
	By:	 	 /s/ Cristina Volc

		 	Name: Cristina Volc
		 	Title: Vice PresidentEX-4.3

 Exhibit 4.3 

EXECUTION VERSION 
 FIRST
SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of November 16, 2020, among Utah Acquisition Sub Inc., a Delaware corporation (“Acquisition Sub”), Mylan II B.V., a private limited liability
company incorporated and existing under the laws of the Netherlands (“Mylan II B.V.”), Mylan Inc., a Pennsylvania corporation (“Mylan Inc.”), Viatris Inc. (formerly known as Upjohn Inc.), a Delaware corporation
(“Viatris Inc.” and, together with Mylan II B.V. and Mylan Inc., the “Note Guarantors”), and The Bank of New York Mellon, as trustee under the Indenture referred to below (the “Trustee”). 

W I T N E S S E T H 

WHEREAS, Mylan N.V., a public limited liability company (naamloze vennootschap) incorporated and existing under the laws of the
Netherlands (“Mylan N.V.”), as issuer, and Mylan Inc., as guarantor, have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of December 9, 2015, providing for the
issuance of 3.750% Senior Notes due 2020 (the “Notes”); 
 WHEREAS, pursuant to the terms of the Separation and
Distribution Agreement, dated as of July 29, 2019, by and between Pfizer Inc., a Delaware corporation (“Pfizer Inc.”), and Viatris Inc., as amended (the “Separation and Distribution Agreement”), and the
Business Combination Agreement, dated as of July 29, 2019, by and among Pfizer Inc., Viatris Inc., Acquisition Sub, Mylan N.V., Mylan I B.V., a private limited liability company incorporated and existing under the laws of the Netherlands
(“Mylan I B.V.”), and Mylan II B.V., as amended (the “Business Combination Agreement”), among other things, Mylan N.V. will merge with and into Mylan II B.V. and will cease to exist as a separate legal entity (the
“Merger”); 
 WHEREAS, following the consummation of the Merger (the “Merger Effective Time”), Acquisition
Sub and Mylan I B.V. shall enter into a purchase and sale agreement, whereby Mylan I B.V. will sell and agree to transfer, immediately following the Merger Effective Time, all issued and outstanding shares in the capital of Mylan II B.V. to
Acquisition Sub (the “Share Sale”), and Mylan I B.V. will subsequently be dissolved and liquidated; 
 WHEREAS, following
the consummation of the Share Sale, Mylan II B.V. will sell and transfer all or substantially all of its assets and liabilities to Acquisition Sub (the “Reorganization”); 

WHEREAS, pursuant to Section 5.01 of the Indenture, (a) in connection with the consummation of the Merger, Mylan II B.V., as
successor to Mylan N.V., is required to assume, by supplemental indenture, all the obligations of Mylan N.V. under the Notes and the Indenture, at which time Mylan N.V. shall be released from all obligations under the Notes and the Indenture and
(b) in connection with the consummation of the Reorganization (the “Reorganization Effective Time”), Acquisition Sub, as successor to Mylan II B.V., is required to assume, by supplemental indenture, all the obligations of Mylan
II B.V. under the Notes and the Indenture, at which time Mylan II B.V. shall be released from all obligations under the Notes and the Indenture (the “Mylan II Release”); 

WHEREAS, notwithstanding the foregoing, Mylan II B.V. wishes to provide, effective as of the Reorganization Effective Time, a guarantee of
Acquisition Sub’s obligations under the Notes and the Indenture following the Mylan II Release; 
 WHEREAS, pursuant to
Section 4.03 of the Indenture, the information, documents and reports required pursuant to the Indenture may, at the option of the issuer, instead be those of any direct or indirect parent entity of the issuer so long as, among other things,
such parent entity fully and unconditionally guarantees, by execution of a supplemental indenture, the obligations of the issuer in respect of the Notes; 

WHEREAS, Viatris Inc. is the direct or indirect parent entity of Acquisition Sub; 

WHEREAS, Viatris Inc. wishes to provide, effective as of the Reorganization Effective Time, a full and unconditional guarantee of Acquisition
Sub’s obligations under the Notes and the Indenture; 

 WHEREAS, the Indenture provides that under certain circumstances additional Guarantors,
including Mylan II B.V. and Viatris Inc., shall execute and deliver to the Trustee a supplemental indenture pursuant to which such Guarantors 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 Guarantees”); and 
 WHEREAS, pursuant to Section 8.01 of the
Indenture, the parties hereto are authorized to execute and deliver this Supplemental Indenture. 
 NOW, THEREFORE, in consideration of the
foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 

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

(a) The definition of “Guarantor” in the Indenture is hereby deleted in its entirety and replaced with the following: 

“Guarantor” means any direct or indirect parent entity or Subsidiary of the Company that Guarantees the Notes
under the Indenture. 
 2. ASSUMPTION. 

(a) Mylan II B.V. hereby expressly assumes, effective as of the Merger Effective Time, all the obligations of the Company under the Notes and
the Indenture, and, effective as of the Merger Effective Time, shall succeed to, and be substituted for, and may exercise every right and power of, the Company under the Indenture and the Notes, and all references to the “Company” or
“Mylan N.V.” in the Indenture and the Notes shall be deemed to be references to Mylan II B.V. At such time, Mylan N.V. shall be released from all obligations under the Indenture and the Notes. 

(b) Acquisition Sub hereby expressly assumes, effective as of the Reorganization Effective Time, all the obligations of Mylan II B.V., as the
Company, under the Notes and the Indenture, and, effective as of the Reorganization Effective Time, shall succeed to, and be substituted for, and may exercise every right and power of, the Company under the Indenture and the Notes, and all
references to the “Company” or “Mylan N.V.” in the Indenture and the Notes shall be deemed to be references to Acquisition Sub. At such time, Mylan II B.V. shall be released from all obligations under the Indenture and the Notes,
subject to Section 3(b) of this Supplemental Indenture. 
 3. AGREEMENT TO GUARANTEE. 

(a) Effective as of the Reorganization Effective Time, Viatris Inc. hereby fully and unconditionally Guarantees (the “Viatris
Guarantee”) the obligations of Acquisition Sub, as the Company, in respect of the Notes on the terms set forth herein, in the Guarantee and in the Indenture including, but not limited to, Article X thereof; provided, however,
that Section 10.07 of the Indenture shall not apply to the Guarantee by Viatris Inc. 
 (b) Effective as of the Reorganization Effective
Time, Mylan II B.V. hereby provides an unconditional Guarantee on the terms and subject to the conditions set forth in the Guarantee and in the Indenture including, but not limited to, Article X thereof. 

4. CONSOLIDATION, MERGER AND SALE OF ASSETS OF VIATRIS INC. 

(a) Viatris Inc. will not consolidate with any other entity or accept a merger of any other entity into Viatris Inc. or permit Viatris Inc. to
be merged into another Person, or sell or lease all or substantially all the assets of Viatris Inc. and its Subsidiaries to, any entity, unless: 

 (1) either Viatris Inc. shall be the continuing entity or the successor,
transferee or lessee entity, if other than Viatris Inc. (the “Viatris Inc. Successor Company”) shall expressly assume, by a supplemental indenture, executed and delivered to the Trustee, in form satisfactory to the Trustee, all the
obligations of Viatris Inc. under the Viatris Guarantee; 
 (2) immediately after such transaction, no Default shall have
occurred and be continuing; and 
 (3) Viatris Inc. shall have delivered to the Trustee an Officer’s Certificate and an
Opinion of Counsel, each stating that such consolidation, merger, sale or lease and such supplemental indenture (if any) comply herewith. 

(b) For purposes of this Section, the sale, lease, conveyance, assignment, transfer or other disposition of all or substantially all of the
properties and assets or one or more Subsidiaries of Viatris Inc., which properties and assets, if held by Viatris Inc. instead of such Subsidiaries, would constitute all or substantially all of the properties and assets of Viatris Inc. on a
consolidated basis, shall be deemed to be the transfer of all or substantially all of the properties and assets of Viatris Inc. 
 (c) The
Viatris Inc. Successor Company will be the successor to Viatris Inc. and shall succeed to, and be substituted for, and may exercise every right and power of, Viatris Inc. under the Viatris Guarantee, and Viatris Inc., as the predecessor company,
except in the case of a lease, shall be released from all obligations under the Viatris Guarantee. 
 5. NO RECOURSE AGAINST OTHERS. No
director, officer, employee or stockholder of Acquisition Sub or any of the Note Guarantors will have any liability for any of Acquisition Sub’s or such Note Guarantor’s obligations under the Notes, the Indenture, the Note Guarantees or
for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the
Notes and the Note Guarantees. 
 6. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK (INCLUDING, WITHOUT LIMITATION,
SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW OR ANY SUCCESSOR TO SUCH STATUTE) WILL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF
CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 
 7. COUNTERPARTS. The
parties may sign any number of copies of this Supplemental Indenture by manual, facsimile or electronic signature. Each signed copy shall be an original, but all of them together represent the same agreement. Signatures of the parties hereto
transmitted by facsimile or electronic format (i.e., “pdf” or “tif”) shall be deemed to be their original signatures for all purposes. 

8. EFFECT OF HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof. 

9. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this
Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Note Guarantors and Acquisition Sub. In entering into this Supplemental Indenture, the Trustee shall be entitled to the
benefit of every provision of the Indenture relating to the conduct of or affecting the liability of or affording protection to the Trustee. 

10. RATIFICATION OF THE INDENTURE; SUPPLEMENTAL INDENTURE PART OF THE INDENTURE. Except as expressly amended hereby, the Indenture is in all
respects ratified and confirmed and all the terms, conditions and provisions thereof, including, without limitation, Section 7.06 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 the Notes shall be bound hereby. 

 11. APPOINTMENT OF AGENT FOR SERVICE. Mylan II B.V. hereby irrevocably appoints Corporation
Service Company, with offices at 19 West 44th Street, Suite 200, New York, NY 10036, as its agent for service of process in any related proceeding and agrees that service of process in any such related proceeding may be made upon it at the office of
such agent. Mylan II B.V. waives, to the fullest extent permitted by law, any other requirements of or objections to personal jurisdiction with respect thereto. Mylan II B.V. represents and warrants that such agent has agreed to act as its agent for
service of process, and Mylan II B.V. agrees to take any and all action, including the filing of any and all documents and instruments, that may be necessary to continue such appointment in full force and effect. 

12. ELECTRONIC DELIVERY. The parties acknowledge and agree that they may execute this Supplemental Indenture, and any variation or amendment to
the same, and all documents required to be delivered in connection with this Supplemental Indenture, by electronic instrument. The parties agree that the electronic signatures appearing on this Supplemental Indenture and on all documents required to
be delivered in connection with this Supplemental Indenture shall have the same effect as handwritten signatures and the use of an electronic signature on this Supplemental Indenture and on all documents required to be delivered in connection with
the Supplemental Indenture shall have the same validity and legal effect as the use of a signature affixed by hand and is made with the intention of authenticating this Supplemental Indenture and on all documents required to be delivered in
connection with the Supplemental Indenture, and evidencing the parties’ intention to be bound by the terms and conditions contained herein. For the purposes of using an electronic signature, the parties authorize each other to the lawful
processing of personal data of the signers for contract performance and their legitimate interests including contract management. 

[Signature Page Follows] 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed, all as of the date first above written. 
 Dated: November 16, 2020 

 

			
	UTAH ACQUISITION SUB INC.
		
	By:	 	 /s/ Sanjeev Narula

		 	Name: Sanjeev Narula
		 	Title: Authorized Officer
	
	MYLAN II B.V.
		
	By:	 	 /s/ Thomas Salus

		 	Name: Thomas Salus
		 	Title: Director
	
	VIATRIS INC.
		
	By:	 	 /s/ Sanjeev Narula

		 	Name: Sanjeev Narula
		 	Title: Authorized Officer
	
	MYLAN INC.
		
	By:	 	 /s/ John Miraglia

		 	Name: John Miraglia
		 	Title: Treasurer
	
	 THE BANK OF NEW YORK MELLON,
 as
Trustee

		
	By:	 	 /s/ Francine Kincaid

		 	Name: Francine Kincaid
		 	Title: Vice President

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