Document:

EX-4.45

 Exhibit 4.45 

FIRST SUPPLEMENTAL INDENTURE 

FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) dated as of November 30, 2017, among CONSTELLIUM INTERNATIONAL
S.A.S. (the “New Guarantor”), which is a subsidiary of CONSTELLIUM N.V., (or its successor), a public company with limited liability (naamloze vennootschap) incorporated under the laws of The Netherlands and with its
corporate seat in Amsterdam, the Netherlands (the “Issuer”) and DEUTSCHE BANK TRUST COMPANY AMERICAS, as trustee under the indenture referred to below (the “Trustee”), DEUTSCHE BANK AG, LONDON BRANCH, as Principal Paying Agent
and DEUTSCHE BANK LUXEMBOURG S.A., as Registrar and Transfer Agent. 
 W I T N E S S E T H: 

WHEREAS the Issuer and the existing Guarantors have heretofore executed and delivered to the Trustee an indenture (as amended, supplemented or
otherwise modified, the “Indenture”) dated as of November 9, 2017, providing initially for the issuance of €400,000,000 in aggregate principal amount of the Issuer’s 4.250 % Senior Notes due 2026 (the
“Securities”); 
 WHEREAS Section 4.11 of the Indenture provides that under certain circumstances the Issuer is required to
cause the New Guarantor to execute and deliver to the Trustee a supplemental indenture pursuant to which the New Guarantor shall unconditionally guarantee all the Issuer’s Obligations under the Securities and the Indenture pursuant to a
Guarantee on the terms and conditions set forth herein; and 
 WHEREAS pursuant to Section 9.01 of the Indenture, the Trustee and the
New Guarantor 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 New Guarantor, the Issuer and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Securities as follows: 

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 that the term “Holders” in this Guarantee shall refer to the term “Holders” as defined in the Indenture and the Trustee acting on behalf of and 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. 

2. Agreement to Guarantee. The New Guarantor hereby agrees, jointly and severally with all existing Guarantors (if any), to
unconditionally guarantee the Issuer’s Obligations under the Securities and the Indenture on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions of the Indenture
and the Securities and to perform all of the obligations and agreements of a Guarantor under the Indenture. 
 3. Notices. All
notices or other communications to the New Guarantor shall be given as provided in Section 11.03 of the Indenture. 

 4. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as
expressly amended 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 Securities heretofore or hereafter authenticated and delivered shall be bound hereby. 
 5. Governing
Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW. 

6. Trustee Makes No Representation. The Trustee makes no representation as to the validity or sufficiency of this Supplemental
Indenture. 
 7. Counterparts. The parties may sign any number of copies of this Supplemental Indenture by manual, facsimile, pdf or
other electronically transmitted signature. Each signed copy shall be an original, but all of them together represent the same agreement. 

8. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction thereof. 

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

			
	CONSTELLIUM INTERNATIONAL S.A.S.
		
	By:	 	/s/ Corinne Fornara
	Name:	 	Corinne Fornara
	Title:	 	President

 [First Supplemental Indenture – November 2017 EUR Notes – Signature Page] 

 
			
	DEUTSCHE BANK TRUST COMPANY AMERICAS
		
	By:	 	Deutsche Bank National Trust Company

  

			
	By:	 	/s/ DEBRA A. SCHWALB
	Name:	 	DEBRA A. SCHWALB
	Title:	 	VICE PRESIDENT

  

			
	By:	 	/s/ Chris Niesz
	Name:	 	Chris Niesz
	Title:	 	Assistant Vice President

  

			
	DEUTSCHE BANK A.G., LONDON BRANCH

 
			
		
	By:	 	 
	Name:	 	
	Title:	 	

  

			
	By:	 	 
	Name:	 	
	Title:	 	

  

			
	DEUTSCHE BANK LUXEMBOURG S.A.

 
			
		
	By:	 	 
	Name:	 	
	Title:	 	

  

			
	By:	 	 
	Name:	 	
	Title:	 	

 [First Supplemental Indenture – November 2017 EUR Notes – Signature Page] 

 
			
	DEUTSCHE BANK TRUST COMPANY AMERICAS
		
	By:	 	Deutsche Bank National Trust Company

  

			
	By:	 	 
	Name:	 	
	Title:	 	

  

			
	By:	 	 
	Name:	 	
	Title:	 	

  

			
	DEUTSCHE BANK A.G., LONDON BRANCH
		
	By:	 	/s/ Paul Yetton
	Name:	 	Paul Yetton
	Title:	 	Assistant Vice President

  

			
	By:	 	/s/ Kieran Odedra
	Name:	 	Kieran Odedra
	Title:	 	Vice President

  

			
	DEUTSCHE BANK LUXEMBOURG S.A.
		
	By:	 	/s/ Paul Yetton
	Name:	 	Paul Yetton
	Title:	 	Attorney

  

			
	By:	 	/s/ Kieran Odedra
	Name:	 	Kieran Odedra
	Title:	 	Attorney

 [First Supplemental Indenture – November 2017 EUR Notes – Signature Page]EX-4.48

 Exhibit 4.48 

FIRST SUPPLEMENTAL INDENTURE 

FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) dated as of November 30, 2017, among CONSTELLIUM INTERNATIONAL
S.A.S. (the “New Guarantor”), which is a subsidiary of CONSTELLIUM N.V., (or its successor), a public company with limited liability (naamloze vennootschap) incorporated under the laws of The Netherlands and
with its corporate seat in Amsterdam, the Netherlands (the “Issuer”) and DEUTSCHE BANK TRUST COMPANY AMERICAS, as trustee under the indenture referred to below (the “Trustee”). 

W I T N E S S E T H: 
 WHEREAS
the Issuer and the existing Guarantors have heretofore executed and delivered to the Trustee an indenture (as amended, supplemented or otherwise modified, the “Indenture”) dated as of February 16, 2017, providing initially for the
issuance of $650,000,000 in aggregate principal amount of the Issuer’s 6.625% Senior Notes due 2025 (the “Securities”); 

WHEREAS Section 4.11 of the Indenture provides that under certain circumstances the Issuer is required to cause the New Guarantor to
execute and deliver to the Trustee a supplemental indenture pursuant to which the New Guarantor shall unconditionally guarantee all the Issuer’s Obligations under the Securities and the Indenture pursuant to a Guarantee on the terms and
conditions set forth herein; and 
 WHEREAS pursuant to Section 9.01 of the Indenture, the Trustee and the New Guarantor 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 New Guarantor, the Issuer and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Securities as follows: 

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 that the term “Holders” in this Guarantee shall refer to the term “Holders” as defined in the Indenture and the Trustee acting on behalf of and 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. 

2. Agreement to Guarantee. The New Guarantor hereby agrees, jointly and severally with all existing Guarantors (if any), to
unconditionally guarantee the Issuer’s Obligations under the Securities and the Indenture on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions of the Indenture
and the Securities and to perform all of the obligations and agreements of a Guarantor under the Indenture. 
 3. Notices. All
notices or other communications to the New Guarantor shall be given as provided in Section 11.03 of the Indenture. 

 4. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as
expressly amended 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 Securities heretofore or hereafter authenticated and delivered shall be bound hereby. 
 5. Governing
Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW. 

6. Trustee Makes No Representation. The Trustee makes no representation as to the validity or sufficiency of this Supplemental
Indenture. 
 7. Counterparts. The parties may sign any number of copies of this Supplemental Indenture by manual, facsimile, pdf or
other electronically transmitted signature. Each signed copy shall be an original, but all of them together represent the same agreement. 

8. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction thereof. 

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

			
	CONSTELLIUM INTERNATIONAL S.A.S.
		
	By:	 	/s/ Corinne Fornara
	Name:	 	Corinne Fornara
	Title:	 	President

 [First Supplemental Indenture – February 2017 Notes – Signature Page] 

 
			
	DEUTSCHE BANK TRUST COMPANY AMERICAS
		
	By:	 	Deutsche Bank National Trust Company

  

			
	By:	 	/s/ DEBRA A. SCHWALB
	Name:	 	DEBRA A. SCHWALB
	Title:	 	VICE PRESIDENT

  

			
	By:	 	/s/ Chris Niesz
	Name:	 	Chris Niesz
	Title:	 	Assistant Vice President

 [First Supplemental Indenture – February 2017 Notes – Signature Page]

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