EX-4.6



 Exhibit 4.6 

This FIFTH SUPPLEMENTAL INDENTURE (this “Fifth Supplemental Indenture”), dated as of March 26, 2018, among SEASPAN
CORPORATION, a corporation duly organized and existing under the laws of the Republic of The Marshall Islands (the “Company”), SEASPAN INVESTMENT I LTD., a corporation duly organized and existing under the laws of the Republic of
The Marshall Islands (the “Guaranteeing Subsidiary”), each of the subsidiaries listed on the signature pages hereto as “Guarantors” (collectively, the “Guarantors”) and THE BANK OF NEW
YORK MELLON, as trustee (the “Trustee”). 
 RECITALS 

WHEREAS, the Company and the Trustee have heretofore executed and delivered an indenture, dated as of October 10, 2017 (the
“Base Indenture”), providing for the issuance by the Company from time to time of its Securities to be issued in one or more series, which Base Indenture was amended and supplemented by (i) a second supplemental
indenture, dated as of February 14, 2018 (the “Second Supplemental Indenture”), providing for the issuance of a series of Securities designated as its “5.50% Senior Notes due 2025”, in an aggregate principal amount of
$250,000,000 (the “2025 Notes”), (ii) a third supplemental indenture, dated as of February 22, 2018 (the “Third Supplemental Indenture”), among the Company, the Guarantors and the Trustee, and (iii) a
fourth supplemental indenture, dated as of March 22, 2018 (the “Fourth Supplemental Indenture”), among the Company, the Guarantors and the Trustee; 

WHEREAS, clause (12) of the second sentence of Section 7.01 of the Second Supplemental Indenture provides that the Company, the
Guarantors and the Trustee may, without the consent of any Holder of the 2025 Notes, enter into indentures supplemental to the Indenture for the purpose of adding a Guarantor under the Indenture; 

WHEREAS, Section 4.01(i)(A) of the Fourth Supplemental Indenture provides that the Company shall cause the Guaranteeing Subsidiary to
execute a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall become a Guarantor under the Indenture and unconditionally guarantee the Indenture Obligations (as defined in the Second Supplemental Indenture); 

WHEREAS, pursuant to Section 7.01 of the Second Supplemental Indenture, the Trustee, the Company, the Guaranteeing Subsidiary and the
Guarantors are authorized to execute and deliver this Fifth Supplemental Indenture to amend or supplement the Indenture as set forth herein; and 

WHEREAS, all actions required to be taken by the Company, the Guaranteeing Subsidiary and each of the Guarantors under the Indenture to make
this Fifth Supplemental Indenture a valid, binding and legal agreement of the Company, the Guaranteeing Subsidiary and each of the Guarantors, have been done. 

NOW, THEREFORE, in consideration of the premises and for other good and valuable consideration, the sufficiency and adequacy of which are
hereby acknowledged, the parties hereto hereby agree as follows: 
 Section 1.01. Definitions. 

(a) The Base Indenture, as amended and supplemented by the Second Supplemental Indenture, the Third Supplemental Indenture and the Fourth
Supplemental Indenture is collectively referred to herein as the “Indenture.” 
 (b) All capitalized terms used herein and
not otherwise defined below shall have the meanings ascribed thereto in the Indenture. 







 Section 2.01. Application of this Fifth Supplemental Indenture. Notwithstanding any
other provision of this Fifth Supplemental Indenture, the provisions of this Fifth Supplemental Indenture expressly and solely relate to the Indenture with respect to the 2025 Notes and any such provisions shall not be deemed to apply to any other
Securities issued under the Indenture and shall not be deemed to amend, modify or supplement the Indenture for any purpose other than with respect to the 2025 Notes. 

Section 3.01. Joinder to Indenture. The Guaranteeing Subsidiary hereby agrees to become bound by the terms, conditions and other
provisions of the Indenture with all attendant rights, duties and obligations stated therein, with the same force and effect as if originally named as a “Guarantor” therein and if such party executed the Second Supplemental Indenture as a
“Guarantor” on the date of the Second Supplemental Indenture. 
 Section 4.01. Agreement to Guarantee. The
Guaranteeing Subsidiary hereby agrees, jointly and severally with all Guarantors, to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Indenture including but not limited to Article IX of the Second
Supplemental Indenture, and subject to the limitations therein. 
 Section 5.01. Governing Law. THIS FIFTH SUPPLEMENTAL
INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE OR INSTRUMENTS ENTERED INTO AND, IN EACH CASE, PERFORMED IN THE STATE OF NEW YORK. 

Section 6.01. Counterparts. This Fifth Supplemental Indenture may be executed in several counterparts, each of which shall be an
original and all of which shall constitute but one and the same instrument. Counterparts may be executed either in original, facsimile or electronic (i.e., “pdf” or “tif”) form and the parties hereto adopt any signatures received
by facsimile or electronic (i.e., “pdf” or “tif”) transmission as the original signature of such party. This Fifth Supplemental Indenture shall become effective upon the execution hereof by each of the parties hereto. 

Section 7.01. Headings. The Article and Section headings of this Fifth Supplemental Indenture are for convenience only and shall
not affect the construction hereof. 
 Section 8.01. Trustee Not Responsible for Recitals. The recitals contained herein shall
be taken as the statements of the Company and the Guarantors and neither the Trustee nor any Authenticating Agent assumes any responsibility for their correctness. The Trustee makes no representations as to the validity or sufficiency of this Fifth
Supplemental Indenture, except that the Trustee represents that it is duly authorized under its corporate bylaws to execute and deliver this Fifth Supplemental Indenture. 

[PAGE INTENTIONALLY LEFT BLANK] 







 
			
	GUARANTEEING SUBSIDIARY:
	
	SEASPAN INVESTMENT I LTD.
		
	 By:
	 	 /s/ Mark Chu

		 	 Name: Mark Chu

		 	 Title: Secretary



 Signature page to Fifth Supplemental Indenture 







 
			
	Seaspan Holdco IV Ltd.
		
	 By:
	 	 /s/ Mark Chu

		 	 Name: Mark Chu

		 	 Title: Secretary

	
	Seaspan Ship Management Ltd.
		
	 By:
	 	 /s/ Mark Chu

		 	 Name: Mark Chu

		 	 Title: Secretary

	
	Seaspan Crew Management Ltd.
		
	 By:
	 	 /s/ Peter Curtis

		 	 Name: Peter Curtis

		 	 Title: Director

	
	Seaspan Crew Management India Private Ltd.
		
	 By:
	 	 /s/ Peter Curtis

		 	 Name: Peter Curtis

		 	 Title: Director

	
	Seaspan Management Services Limited
		
	 By:
	 	 /s/ Peter Curtis

		 	 Name: Peter Curtis

		 	 Title: Vice President

	
	Seaspan Advisory Services Ltd.
		
	 By:
	 	 /s/ Peter Curtis

		 	 Name: Peter Curtis

		 	 Title: Vice President



 Signature page to Fifth Supplemental Indenture 







 
			
	TRUSTEE:
	
	 THE BANK OF NEW YORK MELLON, as Trustee

		
	 By:
	 	 /s/ Teresa Wyszomierski

		 	 Name: Teresa Wyszomierski

Title: Vice President



 Signature page to Fifth Supplemental Indenture