Document:

EX-4.1

 Exhibit 4.1 

EXECUTION VERSION 
 This THIRD
SUPPLEMENTAL INDENTURE (this “Third Supplemental Indenture”), dated as of February 22, 2018, among SEASPAN CORPORATION, a corporation duly organized and existing under the laws of the Republic of The Marshall Islands (the
“Company”), the Guarantors (as defined herein) 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”), between the Company and the Trustee, as amended and supplemented by a second supplemental
indenture, dated as of February 14, 2018 (the “Second Supplemental Indenture”), among the Company, the Guarantors and the Trustee, providing for the issuance of 5.50% Senior Notes due 2025 (the “Notes”); 

WHEREAS, Section 7.01 of the Second Supplemental Indenture provides, among other things, that the Company and the Trustee may, without
the consent of Holders, enter into indentures supplemental to the Base Indenture to secure the Notes; 
 WHEREAS, pursuant to
Section 7.01(7) of the Second Supplemental Indenture, the Trustee and the Company are authorized to execute and deliver this Third Supplemental Indenture to amend or supplement the Indenture, without the consent of any Holder of Securities; and

 WHEREAS, all actions required to be taken by the Company and each of the Guarantors under the Indenture to make this Third Supplemental
Indenture a valid, binding and legal agreement of the Company 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: 

ARTICLE I 
 DEFINITIONS
AND INCORPORATION BY REFERENCE 
 Section 1.01. Definitions. 

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

“Collateral” means 100 shares of the capital stock, par value $0.01 per share, of Seaspan Investment I Ltd. owned by the
Company and evidenced by certificate number 001 and all proceeds and products of the foregoing, all books and records at any time evidencing or relating to the foregoing, all supporting obligations related thereto, and all accessions to,
substitutions and replacements for, and profits and products of, the foregoing, and any and all proceeds of any indemnity, warranty or guaranty payable to the Company from time to time with respect to the foregoing. 

“Pledge Agreement” means the Pledge Agreement, dated as of February 22, 2018, between the Company and the Trustee, as
the same may from time to time be amended. 

 “Seaspan Investment” means Seaspan Investment I Ltd, a corporation duly
organized and existing under the laws of the Republic of The Marshall Islands. 
 ARTICLE II 

APPLICATION OF SUPPLEMENTAL INDENTURE 

Section 2.01. Application of this Third Supplemental Indenture. Notwithstanding any other provision of this Third Supplemental
Indenture, the provisions of this Third Supplemental Indenture are expressly and solely for the benefit of the Trustee and the Holders of the 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 Base Indenture for any purpose other than with respect to the Notes. 

ARTICLE III 
 COLLATERAL

 Section 3.01. Collateral. The Company hereby represents and warrants that as of the date of this Third Supplemental
Indenture, (a) the only outstanding shares of capital stock of Seaspan Investment are the 100 shares of capital stock, par value $0.01 per share, owned by the Company and evidenced by certificate number 001 and (b) Seaspan Investment has
no liabilities and its only assets are Seaspan Investment’s investment in Greater China Industrial Investments LLC, a limited liability company duly organized and existing under the laws of the Republic of The Marshall Islands. The Company
shall not permit Seaspan Investment to issue any additional shares of capital stock unless such additional shares are issued to the Company or any Subsidiary of the Company and a lien on and security interest in all of the right, title and interest
of the Company or such Subsidiary of the Company in, to and under such additional shares of capital stock is pledged, assigned and granted for the ratable benefit of the Trustee and the Holders. 

ARTICLE IV 
 EVENTS OF
DEFAULT 
 Section 4.01. Additional Events of Default. In addition to the Events of Default in Article 5 of the Base
Indenture, as amended and supplemented by Article VI of the Second Supplemental Indenture, solely for the purposes of the Notes (and not in relation to any other series of Securities), the following shall be an Event of Default with respect to the
Notes: 
 (a)    the Pledge Agreement or any security interest or lien purported to be created by the
Pledge Agreement ceases for any reason to be enforceable or the Company, or any Person acting on behalf of the Company, denies or disaffirms, in writing, any obligation of the Company set forth in or arising under the Pledge Agreement. 

ARTICLE V 
 AMENDMENTS TO
THE PLEDGE AGREEMENT 
 Section 5.01. Amendments, Supplements and Waivers to the Pledge Agreement. With the consent of the
Holders of each Outstanding Note, including consents obtained in connection with a tender offer or exchange offer, by Act of said Holders delivered to the Company and the Trustee, the Company (when authorized by or pursuant to a Company’s Board
Resolution) and the Trustee (upon Company Order) may enter into an amendment, supplement or waiver to the Pledge Agreement or the provisions in the Indenture dealing with the Collateral or the Pledge Agreement. 

  
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 Section 5.02. Execution of Amendments, Supplements and Waivers. As a condition
to executing any supplement, amendment or waiver permitted by this Article V, the Trustee shall be entitled to receive, and shall be fully protected in relying upon, an Opinion of Counsel and an Officer’s Certificate each stating that the
execution of such supplemental indenture, amendment or waiver is authorized or permitted by the Indenture and that all conditions precedent to the execution of such supplement, amendment or waiver have been fulfilled. The Trustee may, but shall not
be obligated to, enter into any such supplement, amendment or waiver which affects the Trustee’s own rights, duties or immunities under the Indenture, the Pledge Agreement or otherwise. 

ARTICLE VI 
 PLEDGE
AGREEMENT AND COLLATERAL 
 Section 6.01. Pledge Agreement Authorization. The Holders hereby authorize and direct the
Trustee to execute and deliver the Pledge Agreement and to take such actions on its behalf under the provisions of the Pledge Agreement and to exercise such powers and perform such duties as are delegated to the Trustee by the terms of the Pledge
Agreement, together with such actions and powers as are reasonably incidental thereto. 
 Section 6.02. Extension of Rights
and Protections. All rights and protections of the Trustee set forth in the Indenture, including without limitation its right to indemnification and reimbursement, shall extend to the Trustee in connection with its actions or omissions under the
Pledge Agreement. 
 Section 6.03. Additional Rights of the Trustee. In addition to the rights and protections of the
Trustee under the Indenture, the Trustee shall have the following additional rights and protections under this Third Supplemental Indenture and the Pledge Agreement: 

(a)    the Trustee shall not be responsible for, nor incur any liability with respect to, (i) the
existence, genuineness or value of any of the Collateral or for the validity, perfection, priority or enforceability of the security interest in any of the Collateral, whether impaired by operation of law or by reason of any action or omission to
act on its part under this Third Supplemental Indenture or the Pledge Agreement, or for the filing, form, content or renewal of any UCC financing statements, fixture filings, mortgages, deeds of trust or such other documents or instruments related
to the Collateral, (ii) the validity, sufficiency or condition of the Collateral or any agreement or assignment related thereto, (iii) the validity of the title of the Company to the Collateral, (iv) insuring the Collateral or
(v) the payment of taxes, charges or assessments upon the Collateral; 
 (b)    the Trustee shall
have no duty to the Holders as to any Collateral in its possession or in the possession of someone under its control or in the possession or control of any agent or nominee of the Trustee or any income thereon or as to the preservation of rights
against prior parties or any other rights pertaining thereto, except the duty to accord such of the Collateral as may be in its possession substantially the same care as it accords similar assets held for the benefit of third parties; 

(c)    the Trustee shall be under no obligation independently to request or examine insurance coverage with
respect to any Collateral; and 

  
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 (d)    the Trustee shall be under no obligation or duty to
take any action under the Indenture or the Pledge Agreement if taking such action would subject the Trustee to a tax in any jurisdiction where it is not then subject to a tax or would require the Trustee to qualify to do business in any jurisdiction
where it is not then so qualified. 
 Section 6.04. Release of Collateral. 

(a)    Each of the Holders irrevocably authorizes the Trustee to release any lien on the Collateral and/or
to terminate the Pledge Agreement (i) upon the satisfaction and discharge of the Indenture Obligations or (ii) if consented to by the Holders of each Outstanding Note. 

(b)    In no event shall the Trustee be obligated to execute or deliver any document evidencing any release
or re-conveyance of Collateral without receipt of an Officer’s Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for in the Indenture and the Pledge Agreement
relating to such release or re-conveyance have been complied with and that such release or re-conveyance of the Collateral is authorized or permitted by the terms of the
Indenture and the Pledge Agreement. 
 ARTICLE VII 

MISCELLANEOUS 

Section 7.01. Ratification of Indenture. This Third Supplemental Indenture is executed and shall be constructed as an indenture
supplement to the Base Indenture, as amended and supplemented by the Second Supplemental Indenture and as further supplemented and modified hereby, the Base Indenture and the Second Supplemental Indenture are in all respects ratified and confirmed,
and the Base Indenture, the Second Supplemental Indenture and this Third Supplemental Indenture shall be read, taken and constructed as one and the same instrument. 

Section 7.02. Trust Indenture Act Controls. If any provision of this Third Supplemental Indenture limits, qualifies or conflicts
with another provision that is required or deemed to be included in this Third Supplemental Indenture by the Trust Indenture Act, the required or deemed provision shall control. 

Section 7.03. Notices. All notices and other communications shall be given as provided in the Indenture. 

Section 7.04. Governing Law. THIS THIRD 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 7.05. Successors. All covenants and agreements in this Third Supplemental Indenture by the Company shall bind its
successors and assigns, whether so expressed or not. 
 Section 7.06. Counterparts. This Third 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. 

  
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 Section 7.07. Headings. The Article and Section headings of this Third Supplemental
Indenture are for convenience only and shall not affect the construction hereof. 
 Section 7.08. Trustee Not Responsible for
Recitals. The recitals contained herein shall be taken as the statements of the Company and the Guarantors and the Trustee assumes no responsibility for their correctness. The Trustee makes no representations as to the validity or sufficiency of
this Third Supplemental Indenture, except that the Trustee represents that it is duly authorized under its corporate bylaws to execute and deliver this Third Supplemental Indenture and perform its obligations hereunder. 

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

			
	COMPANY:
	
	SEASPAN CORPORATION
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	 Title:   Chief Administrative Officer,

            General Counsel and Secretary

  
 Signature page to
Third Supplemental Indenture 

			
	GUARANTORS:
	
	Seaspan Holding 140 Ltd.
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	Title:   Secretary
	
	Seaspan 140 Ltd.
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	Title:   Secretary
	
	Seaspan (Asia) Corporation
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	Title:   Secretary
	
	Seaspan Containership 2180 Ltd.
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	Title:   Secretary
	
	Seaspan Containership 2181 Ltd.
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	Title:   Secretary
	
	Seaspan Holdco I Ltd.
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	Title:   Secretary
	
	Seaspan Holdco II Ltd.
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	Title:   Secretary
	
	Seaspan Holdco III Ltd.
		
	By:	 	/s/ Mark Chu
		 	Name: Mark Chu
		 	Title:   Secretary

  
 Signature page to
Third 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:   President
	
	Seaspan Crew Management India Private Ltd.
		
	By:	 	/s/ David Spivak
		 	Name: David Spivak
		 	Title:   Chief Financial Officer
	
	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
Third Supplemental Indenture 

 
			
	TRUSTEE:
	
	THE BANK OF NEW YORK MELLON, as Trustee
		
	By:	 	/s/ Teresa Wyszomierski
		 	Name: Teresa Wyszomierski
		 	Title:   Vice President

  
 Signature page to
Third Supplemental IndentureEX-4.2

 Exhibit 4.2 

EXECUTION VERSION 
 PLEDGE
AGREEMENT 
 This PLEDGE AGREEMENT, dated as of February 22, 2018 (as amended, amended and restated, supplemented or otherwise modified from time to
time in accordance with the provisions hereof, this “Agreement”) made by and between SEASPAN CORPORATION (together with any successor, the “Grantor”), as grantor, pledgor, assignor and debtor, in favor THE BANK OF
NEW YORK MELLON, in its capacity as trustee (the “Trustee”) pursuant to the Indenture, dated as of October 10, 2017 (the “Base Indenture”), by and between the Grantor and The Bank of New York Mellon, as trustee
(the “Trustee”), as amended and supplemented by a second supplemental indenture (the “Second Supplemental Indenture”), dated as of February 14, 2018, by and among the Grantor, certain subsidiary guarantors
specified therein (the “Guarantors”) and the Trustee, as further amended and supplemented by a third supplemental indenture, dated as of February 22, 2018 (the “Third Supplemental Indenture” and, collectively
with the Base Indenture and the Second Supplemental Indenture, the “Indenture”), by and among the Grantor, the Guarantors and the Trustee. 

NOW THEREFORE, in consideration of the foregoing premises and other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the Grantor and the Trustee hereby agree as follows: 

Section 1.01    Definitions. The following terms shall have the following meanings: 

“Secured Obligations” means the Indenture Obligations (as defined in the Second Supplemental Indenture). 

“Secured Parties” means, collectively, the Trustee and the Holders (as defined in the Second Supplemental Indenture). 

“Shares” means 100 shares of the capital stock, par value $0.01 per share, of Seaspan Investment I Ltd. owned by the Grantor
and evidenced by certificate number 001. 
 Any capitalized terms used but not otherwise defined herein shall have the meanings assigned to such terms in
the Indenture. 
 Section 1.02    Pledge.  

(a)    As collateral security for the payment and performance in full of all the Secured Obligations, the
Grantor hereby pledges, assigns and grants to the Trustee for the ratable benefit of the Secured Parties, a lien on and security interest in and to all of the right, title and interest of such Grantor in, to and under the following property,
wherever located, and whether now existing or hereafter arising or acquired from time to time: (i) the Shares; and (ii) to the extent not covered by clause (i) of this sentence, all proceeds and products of the foregoing, all books
and records at any time evidencing or relating to the foregoing, all supporting obligations related thereto, and all accessions to, substitutions and replacements for, and profits and products of, the foregoing, and any and all proceeds of any
indemnity, warranty or guaranty payable to the Grantor from time to time with respect to the foregoing. 

(b)    Upon the occurrence and during the continuance of an Event of Default under the Indenture, the
Trustee shall have the right to receive all distributions, fees, compensation and other monies constituting or payable with respect to the Shares and the same and the proceeds thereof shall be applied, along with other stated payments due under the
Indenture, to the Secured Obligations in accordance with the Indenture until the Secured Obligations shall have been repaid in full. 

 (c)    Upon the occurrence and during the continuation of an
Event of Default under the Indenture, following written notice by the Trustee (acting at the written direction of the Holders of not less than a majority in principal amount of the Outstanding Notes) to the Grantor: (i) all rights of the
Grantor to receive the dividends, distributions and interest payments which it would otherwise be authorized to receive and retain with respect to the Shares shall cease and all such rights shall thereupon be vested in the Trustee which shall then
have the sole right to receive and hold such dividends, distributions and interest payments; and (ii) all dividends, distributions and interest payments which are received by the Grantor contrary to the provisions of the foregoing clause
(i) shall be received in trust for the benefit of the Trustee, shall be segregated from other property or funds of the Grantor, and shall be forthwith paid over to the Trustee in the exact form received, to be held by the Trustee as further
collateral security for the Secured Obligations. 
 (d)    Upon the occurrence and during the continuance
of an Event of Default under the Indenture, and following written notice by the Trustee (acting at the written direction of the Holders of not less than a majority in principal amount of the Outstanding Notes) to the Grantor, all rights of the
Grantor to exercise the voting and other consensual rights which it would otherwise be entitled to exercise with respect to the Shares shall cease and all such rights shall thereupon become vested in the Trustee which shall then have the sole right
to exercise such voting and other consensual rights. Notwithstanding any other provision of this Agreement, the Trustee shall not be deemed to assume any contractual obligation of the Grantor owing to any Person by reason of this Agreement or a
foreclosure by the Trustee on the Shares, and such obligations shall remain the obligations of the Grantor. 

(e)    The Trustee shall not be obligated to perform or discharge, nor does it hereby undertake to perform
or discharge, any obligation, duty or liability imposed on the Grantor under or by reason of any organizational document of the Grantor or Seaspan Investment I Ltd., and the Grantor does hereby agree to indemnify the Trustee for and to hold the
Trustee harmless of and from any and all liability, loss, damage, tax, judgment, suit, penalty, cost, or expense (including, without limitation, fees, costs and expenses of any counsel, experts and agents) which it may or might incur as a result of
this Agreement or any such obligation, duty or liability or any action or claim relating thereto. 

Section 1.03    Representations and Warranties. The Grantor represents and warrants as follows: 

(a)    Ownership of Property and No Other Liens. The Grantor is the sole, direct, legal and
beneficial owner of the Shares, and has good and marketable title to the Shares, and the Shares are not subject to any lien, claim, option or right of others. 

(b)    Perfected Security Interest. This Agreement is effective to create in favor of
the Trustee for the ratable benefit of the Secured Parties, a legal, valid and enforceable security interest in the Shares. 

Section 1.04    Modification in Writing. None of the terms or provisions of this Agreement may
be amended, modified, supplemented, terminated or waived, and no consent to any departure by the Grantor therefrom shall be effective, except by a written instrument signed by the Trustee and the Grantor in accordance with the terms of the
Indenture. 

  
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 Section 1.05    Governing Law. This Agreement and any
claim, controversy, dispute or cause of action (whether in contract or tort or otherwise) based upon, arising out of or relating to this Agreement and the transactions contemplated hereby shall be governed by, and construed in accordance with, the
laws of the State of New York. 
 Section 1.06    Counterparts. This Agreement and any
amendments, waivers, consents or supplements hereto may be executed in counterparts (and by different parties hereto in different counterparts), each of which shall constitute an original, but all taken together shall constitute a single contract.
Delivery of an executed counterpart of a signature page to this Agreement by facsimile or in electronic (i.e., “pdf” or “tif”) format shall be effective as delivery of a manually executed counterpart of this Agreement. 

Section 1.07    Trustee Rights. The Trustee shall be entitled to the same rights, protections,
immunities and indemnities as set forth in the Indenture, as if the provisions setting forth those rights, protections, immunities and indemnities are fully set forth herein. 

Section 1.08    Termination. The lien and security interest granted hereunder shall terminate and be
released, in whole or in part, as provided in Section 6.04 of the Third Supplemental Indenture. Additionally, this Agreement shall terminate as provided in Section 6.04 of the Third Supplemental Indenture. In connection with any
termination or release pursuant to this Section 1.08, the Trustee shall, subject to its receipt of any documents required to be delivered to it under the Indenture, execute and deliver to the Grantor or authorize the filing of, at the
Grantor’s expense, all documents that the Grantor shall reasonably request and that are necessary to evidence such termination or release in form and substance reasonably satisfactory to the Trustee. Any execution and delivery of documents
pursuant to this Section 1.08 shall be without recourse to or warranty by the Trustee. 

Section 1.09    Successors and Assigns. All of the terms, covenants, warranties and conditions
contained in this Agreement shall be binding upon and inure to the benefit of the parties hereto and their respective successors and assigns; provided, however, that the Grantor may not assign any of its indebtedness, liabilities or
obligations hereunder. 
 Section 1.10    Notices. Any notice or request hereunder may be given to
the Grantor or the Trustee in accordance with Section 1.5 of the Base Indenture. 

Section 1.11    Further Assurances. The Grantor agrees that at any time and from time to time, upon the
written request of the Trustee (acting at the written direction of the Holders of not less than a majority in principal amount of the Outstanding Notes), the Grantor will execute and deliver such further documents and do such further acts and things
as the Trustee may reasonably request in order to effect the purposes of this Agreement and to protect and perfect the security interests granted hereunder. 

[SIGNATURE PAGE FOLLOWS] 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed as of the date first written
above by their respective officers thereunto duly authorized. 
  

			
	SEASPAN CORPORATION
		
	By:	 	/s/ Mark Chu
	Name:	 	Mark Chu
	Title:	 	 Chief Administrative Officer,
 General
Counsel and Secretary

  

			
	THE BANK OF NEW YORK MELLON, as Trustee
		
	By:	 	/s/ Teresa Wyszomierksi
		 	Authorized Signatory
		 	 Teresa Wyszomierksi

		 	Vice President

  
 [Pledge Agreement
Signature Page]

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