Document:

EX-4.3

 Exhibit 4.3 

[FACE] 
 Number 

Warrants 
 THIS WARRANT
SHALL BE VOID IF NOT EXERCISED PRIOR TO 
 THE EXPIRATION OF THE EXERCISE PERIOD PROVIDED FOR 

IN THE WARRANT AGREEMENT DESCRIBED BELOW 

SEMPER PARATUS ACQUISITION CORPORATION 

Incorporated Under the Laws of the Cayman Islands 

CUSIP [•] 
 Warrant
Certificate 
 This Warrant Certificate certifies that [•], or registered assigns, is the registered holder of warrant(s) evidenced
hereby (the “Warrants” and each, a “Warrant”) to purchase Class A ordinary shares, $0.0001 par value (“Ordinary Shares”), of Semper Paratus Acquisition Corporation, a
Cayman Islands exempted company (the “Company”). Each whole Warrant entitles the holder, upon exercise during the period set forth in the Warrant Agreement referred to below, to receive from the Company that number of fully
paid and nonassessable Ordinary Shares as set forth below, at the exercise price (the “Exercise Price”) as determined pursuant to the Warrant Agreement, payable in lawful money (or through “cashless
exercise” as provided for in the Warrant Agreement) of the United States of America upon surrender of this Warrant Certificate and payment of the Exercise Price at the office or agency of the Warrant Agent referred to below, subject to
the conditions set forth herein and in the Warrant Agreement. Defined terms used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant Agreement. 

Each whole Warrant is initially exercisable for one fully paid and non-assessable Ordinary Share. Fractional Ordinary
Shares shall not be issued upon exercise of any Warrant. If, upon the exercise of Warrants, a holder would be entitled to receive a fractional interest in an Ordinary Share, the Company shall, upon exercise, round down to the nearest whole number
the number of Ordinary Shares to be issued to the Warrant holder. The number of Ordinary Shares issuable upon exercise of the Warrants is subject to adjustment upon the occurrence of certain events as set forth in the Warrant Agreement. 

The initial Exercise Price per one Ordinary Share for any Warrant is equal to $11.50 per share. The Exercise Price is subject to adjustment upon the
occurrence of certain events as set forth in the Warrant Agreement. 
 Subject to the conditions set forth in the Warrant Agreement, the Warrants may be
exercised only during the Exercise Period and to the extent not exercised by the end of such Exercise Period, such Warrants shall become void. The Warrants may be redeemed, subject to certain conditions, as set forth in the Warrant Agreement. 

Reference is hereby made to the further provisions of this Warrant Certificate set forth on the reverse hereof and such further provisions shall for all
purposes have the same effect as though fully set forth at this place. 
 This Warrant Certificate shall not be valid unless countersigned by the Warrant
Agent, as such term is used in the Warrant Agreement. This Warrant Certificate shall be governed by and construed in accordance with the internal laws of the State of New York. 

 
					
	SEMPER PARATUS ACQUISITION CORPORATION
		
	By:	 	          

		 	Name:	 	
		 	Title:	 	Authorized Signatory
	
	COMPUTERSHARE TRUST COMPANY, N.A., AS WARRANT AGENT
		
	By:	 	          

		 	Name:	 	
		 	Title:	 	

 [Form of Warrant Certificate] 

[Reverse] 
 The Warrants evidenced by this
Warrant Certificate are part of a duly authorized issue of Warrants entitling the holder on exercise to receive Ordinary Shares and are issued or to be issued pursuant to a Warrant Agreement dated as of [•], 2021 (the “Warrant
Agreement”), duly executed and delivered by the Company to Computershare Trust Company, N.A., a New York corporation, as warrant agent (the “Warrant Agent”), which Warrant Agreement is hereby incorporated by
reference in and made a part of this Warrant Certificate and is hereby referred to for a description of the rights, limitation of rights, obligations, duties and immunities thereunder of the Warrant Agent, the Company and the holders (the words
“holders” or “holder” meaning the Registered Holders or Registered Holder, respectively) of the Warrants. A copy of the Warrant Agreement may be obtained by the holder hereof upon written request to
the Company. Defined terms used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant Agreement. 

Warrants may be exercised at any time during the Exercise Period set forth in the Warrant Agreement. The holder of Warrants evidenced by this Warrant
Certificate may exercise them by surrendering this Warrant Certificate, with the form of Election to Purchase set forth hereon properly completed and executed, together with payment of the Exercise Price as specified in the Warrant Agreement (or
through “cashless exercise” as provided for in the Warrant Agreement) at the principal corporate trust office of the Warrant Agent. In the event that upon any exercise of Warrants evidenced hereby the number of Warrants exercised
shall be less than the total number of Warrants evidenced hereby, there shall be issued to the holder hereof or his, her or its assignee, a new Warrant Certificate evidencing the number of Warrants not exercised. 

Notwithstanding anything else in this Warrant Certificate or the Warrant Agreement, no Warrant may be exercised unless at the time of exercise (i) a
registration statement covering the issuance of the Ordinary Shares to be issued upon exercise is effective under the Securities Act and (ii) a prospectus thereunder relating to the Ordinary Shares is current, except through “cashless
exercise” as provided for in the Warrant Agreement. 
 The Warrant Agreement provides that upon the occurrence of certain events the number of
Ordinary Shares issuable upon exercise of the Warrants set forth on the face hereof may, subject to certain conditions, be adjusted. If, upon exercise of a Warrant, the holder thereof would be entitled to receive a fractional interest in an Ordinary
Share, the Company shall, upon exercise, round down to the nearest whole number of Ordinary Shares to be issued to the holder of the Warrant. 
 Warrant
Certificates, when surrendered at the principal corporate trust office of the Warrant Agent by the Registered Holder thereof in person or by legal representative or attorney duly authorized in writing, may be exchanged, in the manner and subject to
the limitations provided in the Warrant Agreement, but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor evidencing in the aggregate a like number of Warrants. 

Upon due presentation for registration of transfer of this Warrant Certificate at the office of the Warrant Agent a new Warrant Certificate or Warrant
Certificates of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the transferee(s) in exchange for this Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without charge except
for any tax or other governmental charge imposed in connection therewith. 
 The Company and the Warrant Agent may deem and treat the Registered Holder(s)
hereof as the absolute owner(s) of this Warrant Certificate (notwithstanding any notation of ownership or other writing hereon made by anyone), for the purpose of any exercise hereof, of any distribution to the holder(s) hereof, and for all other
purposes, and neither the Company nor the Warrant Agent shall be affected by any notice to the contrary. Neither the Warrants nor this Warrant Certificate entitles any holder hereof to any rights of a shareholder of the Company. 

 Election to Purchase 

(To Be Executed Upon Exercise of Warrant) 

The undersigned hereby irrevocably elects to exercise the right, represented by this Warrant Certificate, to receive Ordinary Shares and herewith tenders
payment for such Ordinary Shares to the order of Semper Paratus Acquisition Corporation (the “Company”) in the amount of $[•] in accordance with the terms hereof. The undersigned requests that a certificate for such
Ordinary Shares be registered in the name of [•], whose address is [•] and that such Ordinary Shares be delivered to [•] whose address is [•]. If said number of Ordinary Shares is less than all of the Ordinary Shares purchasable
hereunder, the undersigned requests that a new Warrant Certificate representing the remaining balance of such Ordinary Shares be registered in the name of [•], whose address is [•] and that such Warrant Certificate be delivered to
[•], whose address is [•] . 
 In the event that the Warrant has been called for redemption by the Company pursuant to
Section 6.2 of the Warrant Agreement and a holder thereof elects to exercise its Warrant pursuant to a Make-Whole Exercise, the number of Ordinary Shares that this Warrant is exercisable for shall be determined in
accordance with or Section 6.2 of the Warrant Agreement. 
 In the event that the Warrant has been called for redemption by the
Company pursuant to Section 6.1 of the Warrant Agreement and the Company has elected to require all holders to exercise their Warrants on a “cashless basis”, the number of Ordinary Shares that this Warrant is
exercisable for shall be determined in accordance with subsection 3.3.1(b) of the Warrant Agreement. 
 In the event that the Warrant is a Private
Placement Warrant that is to be exercised on a “cashless” basis pursuant to subsection 3.3.1(c) of the Warrant Agreement, the number of Ordinary Shares that this Warrant is exercisable for shall be determined in accordance with
subsection 3.3.1(c) of the Warrant Agreement. 
 In the event that the Warrant is to be exercised on a “cashless” basis pursuant to
Section 7.4 of the Warrant Agreement, the number of Ordinary Shares that this Warrant is exercisable for shall be determined in accordance with Section 7.4 of the Warrant Agreement. 

In the event that the Warrant may be exercised, to the extent allowed by the Warrant Agreement, through cashless exercise (i) the number of Ordinary
Shares that this Warrant is exercisable for would be determined in accordance with the relevant section of the Warrant Agreement which allows for such cashless exercise and (ii) the holder hereof shall complete the following: The undersigned
hereby irrevocably elects to exercise the right, represented by this Warrant Certificate, through the cashless exercise provisions of the Warrant Agreement, to receive Ordinary Shares. If said number of shares is less than all of the Ordinary Shares
purchasable hereunder (after giving effect to the cashless exercise), the undersigned requests that a new Warrant Certificate representing the remaining balance of such Ordinary Shares be registered in the name of [•], whose address is [•]
and that such Warrant Certificate be delivered to [•] , whose address is [•] . 
 [Signature Page Follows] 

Date: [ ], 20 
  

	
	(Signature)
	
	(Address)
	
	(Tax Identification Number)
	
	Signature Guaranteed:
	
	          

 THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN
ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED).EX-10.6

 Exhibit 10.6 

THE OFFER AND SALE OF THIS PROMISSORY NOTE (THIS “NOTE”) HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
“SECURITIES ACT”). THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES ACT OR AN OPINION OF COUNSEL
REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED. 
 PROMISSORY NOTE 

 

			
	Principal Amount: Up to $300,000	  	Dated as of April 22, 2021
		  	New York, New York

 Semper Paratus Acquisition Corporation, a Cayman Islands exempted company and blank check company (the
“Maker”), promises to pay to the order of Semper Paratus Sponsor LLC, a Delaware limited liability company or its registered assigns or successors in interest (together, the “Payee”), the principal sum of up to
Three Hundred Thousand Dollars ($300,000) (the “Maximum Amount”) in lawful money of the United States of America, on the terms and conditions described below. All payments on this Note shall be made by check or wire transfer of
immediately available funds, or as otherwise determined by Maker, to such account as Payee may from time to time designate by Notice (as defined in Section 9) to Maker in accordance with the provisions of this Note. 

1. Principal. The principal balance of this Note shall be payable by Maker on the earlier of: (i) December 31, 2021 (the
“Maturity Date”) or (ii) the date on which Maker consummates an initial public offering of its securities (the “IPO”). The principal balance may be prepaid at any time. Under no circumstances shall any
individual, including but not limited to any officer, director, employee or shareholder of Maker, be obligated personally for any obligations or liabilities of Maker hereunder. 

2. Interest. No interest shall accrue on the unpaid principal balance of this Note. 

3. Drawdown Requests. Maker and Payee agree that Maker may request from the Payee or its affiliates up to the Maximum Amount for costs
reasonably related to Maker’s initial public offering of its securities (which amount shall include the $25,422 funded to date by the Payee or its affiliates). The principal of this Note may be drawn down from time to time prior to the earlier of: (i) December 31, 2021 or (ii) the date on which Maker consummates an initial public offering of its
securities, upon written request from Maker to Payee (each, a “Drawdown Request”). Each Drawdown Request must state the amount to be drawn down, and must not be an amount less than Ten Thousand Dollars ($10,000), unless agreed upon
by Maker and Payee. Payee shall fund each Drawdown Request no later than five business days after receipt of a Drawdown Request; provided, however, that the maximum amount of drawdowns collectively under this Note shall not exceed the Maximum
Amount. Once an amount is drawn down under this Note, such amount shall not be available for future Drawdown Requests, even if such amount is prepaid. No fees, payments or other amounts shall be due to Payee in connection with, or as a result of,
any Drawdown Request by Maker. Notwithstanding the foregoing, all payments shall be applied, first, to payment in full of any costs incurred in the collection of any sum due under this Note, including (without limitation) reasonable
attorneys’ fees, and second, to the reduction of the unpaid principal balance of this Note. 
 4. Application of Payments.
All payments shall be applied, first, to payment in full of any costs incurred in the collection of any sum due under this Note, including (without limitation) reasonable attorney’s fees, second, to the payment
in full of any late charges, and third, to the reduction of the unpaid principal balance of this Note. 

 5. Events of Default. The following events shall constitute an event of default
(“Event of Default”): 
 5.1 Failure to Make Required Payments. The failure by Maker to pay the principal amount due
pursuant to this Note within five business days of the Maturity Date. 
 5.2 Voluntary Bankruptcy, Etc. The: (a) commencement by
Maker of a voluntary case under any applicable bankruptcy, insolvency, reorganization, rehabilitation or other similar law; (b) consent by Maker to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian,
sequestrator (or other similar official) of Maker for any substantial part of its property, (c) making by Maker of any assignment for the benefit of creditors; (d) the failure of Maker generally to pay its debts as such debts become due;
or (e) taking of any corporate action by Maker in furtherance of any of the foregoing events described in Section 5.2(a) – Section 5.2(d). 

5.3 Involuntary Bankruptcy, Etc. The: (a)(i) entry of a decree or order for relief by a court having jurisdiction in the premises in
respect of Maker in an involuntary case under any applicable bankruptcy, insolvency or other similar law, (ii) appointment of a receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar official) of Maker or for any
substantial part of its property, or (iii) the ordering of the winding-up or liquidation of Maker’s affairs; and (b) continuance of any such decree, appointment, or order unstayed and in effect
for a period of 60 consecutive days. 
  

	6.	 Remedies. 

6.1 Upon the occurrence of an Event of Default specified in Section 5.1, Payee may, by Notice to Maker, declare this Note to be due
immediately and payable by Maker, whereupon the unpaid principal amount of this Note, and all other amounts payable hereunder, shall become immediately due and payable without presentment, demand, protest or other notice of any kind, all of which
are hereby expressly waived, notwithstanding anything contained herein or in the documents evidencing the same to the contrary. 
 6.2 Upon
the occurrence of an Event of Default specified in Section 5.2 and Section 5.3, the unpaid principal balance of this Note, and all other sums payable with regard to this Note, shall automatically and immediately become due and payable by
Maker, in all cases without any action on the part of Payee. 
 7. Waivers. Maker and all endorsers and guarantors of, and sureties for, this
Note waive: (a) presentment for payment, demand, notice of dishonor, protest, and notice of protest with regard to the Note; 
 (b) all errors,
defects and imperfections in any proceedings instituted by Payee under the terms of this Note; and (c) all benefits that might accrue to Maker by virtue of any present or future laws (i) exempting any property, real or personal, or any
part of the proceeds arising from any sale of any such real or personal property, from attachment, levy or sale under execution, or (ii) providing for any stay of execution, exemption from civil process, or extension of time for payment. Maker
agrees that any real estate that may be levied upon pursuant to a judgment obtained by virtue hereof or any writ of execution issued hereon, may be sold upon any such writ in whole or in part in any order desired by Payee. 

8. Unconditional Liability. Maker hereby waives all notices in connection with the delivery, acceptance, performance, default, or
enforcement of the payment of this Note, and agrees that Maker’s liability shall be unconditional, without regard to the liability of any other party, and shall not be affected in any manner by any indulgence, extension of time, renewal, waiver
or modification granted or consented to by Payee. Maker consents to any and all extensions of time, renewals, waivers, or modifications that may be granted by Payee with respect to the payment or other provisions of this Note. Maker agrees that
additional makers, endorsers, guarantors, or sureties may become parties hereto without either any Notice to Maker or any bearing on Maker’s liability hereunder. 

  
 - 2 - 

 9. Notices. All notices, requests, consents, claims, demands, waivers, and other communications
hereunder (each, a “Notice”) shall be in writing and addressed to the parties at the addresses set forth below (or to such other address that may be designated by the receiving party from time to time in accordance with this
Section 9). 
  

			
	If to Maker:	  	Semper Paratus Acquisition Corporation
		  	767 Third Avenue, 38th Floor
		  	New York, New York 10017
		  	Attention: Basil Ben Baldanza
		  	Email: bbaldanza@gmail.com
		
	If to Payee:	  	Semper Paratus Sponsor LLC
		  	767 Third Avenue, 38th Floor
		  	New York, New York 10017
		  	Attention: Philippe J. Kurzweil
		  	Email: pj@semperparatusspac.com

 A Notice shall be deemed to have been given (a) when delivered by hand (with written confirmation of receipt); (b)
when received by the addressee if sent by a nationally recognized overnight courier (receipt requested); (c) on the date sent by facsimile or email (with confirmation of transmission) if sent during normal business hours of the recipient, and on the
next business day if sent after normal business hours of the recipient; or (d) on the third day after the date mailed, by certified or registered mail (in each case, return receipt requested, postage
pre-paid). 
 10. Construction. THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF THE
STATE OF NEW YORK, WITHOUT REGARD TO CONFLICT OF LAW PROVISIONS THEREOF. 
 11. Severability. Any provision contained in this Note which is prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any
jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction. 
 12. Trust Waiver. Notwithstanding anything
herein to the contrary, Payee hereby waives any and all right, title, interest or claim of any kind (each, a “Claim”) in or to any distribution of or from the trust account to be established (the “Trust Account”),
in which the proceeds of both the (a) IPO (including the deferred underwriters discounts and commissions) and (b) sale of securities to be issued in a private placement to occur at the closing of the IPO are to be deposited, as described
in greater detail in the Registration Statement on Form S-1 and prospectus to be filed with the Securities and Exchange Commission in connection with the IPO. Payee hereby agrees not to seek recourse,
reimbursement, payment or satisfaction for any Claim against the Trust Account for any reason whatsoever. 
 13. Amendment; Waiver. Any
amendment hereto or waiver of any provision hereof may be made with, and only with, the written consent of both Maker and Payee. 
 14. Assignment. No
assignment or transfer of this Note or any rights or obligations hereunder may be made by any party hereto (by operation of law or otherwise) without the prior written consent of the other party hereto. Any attempted assignment without the required
consent shall be void. 
 [Signature page follows] 

  
 - 3 - 

 IN WITNESS WHEREOF, Maker, intending to be legally bound hereby, has caused
this Note to be duly executed by the undersigned as of the day and year first above written. 
  

			
	SEMPER PARATUS ACQUISITION
	CORPORATION
		
	By:	 	 /s/ Basil Ben Baldanza

		 	Name: Basil Ben Baldanza
		 	Title: CEO

  

  
 [Signature Page to
Promissory Note]

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