Exhibit 10.43


 


UNLESS
PERMITTED UNDER SECURITIES LEGISLATION, THE HOLDER OF THIS SECURITY MUST NOT TRADE THE SECURITY BEFORE [l ], 2021.


 


THE COMMON SHARES UNDERLYING THIS CERTIFICATE
ARE LISTED ON THE TORONTO STOCK EXCHANGE (“TSX”); HOWEVER, THE COMMON SHARES CANNOT BE TRADED THROUGH THE FACILITIES OF THE
TSX SINCE THEY ARE NOT FREELY TRANSFERABLE AND CONSEQUENTLY ANY CERTIFICATE REPRESENTING SUCH COMMON SHARES IS NOT “GOOD DELIVERY”
IN SETTLEMENT OF TRANSACTIONS ON THE TSX.


 


THE
WARRANTS EVIDENCED HEREBY ARE EXERCISABLE UNTIL 5:00 P.M. (EST) ON [l],
2025 AFTER WHICH TIME THEY WILL EXPIRE AND BE OF NO FURTHER FORCE AND EFFECT OR VALUE.


 


Certificate
#2020-[l] dated [l], 2020 (the “Issue Date”), representing [l] Warrants.


 


WARRANT CERTIFICATE


 


PROMIS
NEUROSCIENCES INC.

(Incorporated under the laws of Canada)


 


THIS CERTIFIES that, for value received:


 


[HOLDER
NAME]

[ADDRESS]



(hereinafter referred to as the “Holder”)


 


is the registered holder of that number of warrants
(the “Warrants”) of ProMIS Neurosciences Inc. (the “Issuer”) set forth above.


 


Underlying Securities and Exercise Terms


 


Each
Warrant entitles the Holder to purchase one common share (each a “Common Share”) of the Issuer, as constituted on [l],
2020, at a price of CAD$0.20 per Common Share until 5:00 pm (EST) on [l], 2025 (the “Expiry Date”).


 


At any time after the expiry of the four month
hold period applicable to the Warrants, the Issuer may accelerate the expiry of the Warrants if the twenty-day volume-weighted average
trading price of the Common Shares on the TSX, or such other exchange on which the Common Shares may be listed, is greater than $0.60
provided that (a) the Issuer gives notice of the same in writing to the holder of the Warrants, and (b) the accelerated expiry date is
a date which is not less than 30 calendar days after the date of such notice.


 


The Warrants and Common Shares are collectively
referred to herein as the “Securities”.


 


Warrant Exercise Procedure


 


The Warrants may be exercised at any time prior
to the expiry of the Warrants by surrendering to the Issuer at its head office, at Suite 200, 1920 Yonge Street, Toronto, Ontario, M4S
3E2:


 


		(a)	this Warrant Certificate;



 


		(b)	the Subscription Form attached as Schedule “A” hereto, duly completed and executed; and



 


		(c)	a cheque, bank draft or money order made payable to the Issuer in the aggregate amount of the exercise
price,



 


or such other office or agency of the Issuer as
it may designate by notice in writing delivered to the Holder at the Holder’s address stated above. Upon the due exercise of the
Warrants, the Issuer shall issue or cause to be issued the requisite number of Common Shares to be issued to the Holder pursuant to said
exercise, registered in the name of the Holder or such other person as may be specified in the Subscription Form, and each such person
shall be deemed the holder of such Common Shares with effect from the date of such exercise. If Common Shares are to be issued to a person
other than the Holder, the Holder’s signature on the Subscription Form must be guaranteed by a Canadian chartered bank, a Canadian
trust company or a member firm of the TSX. The Issuer will cause the certificates representing such Common Shares to be mailed to the
Holder at the Holder’s address stated above or such other address(es) as may be specified in the Subscription Form, within five
business days of the exercise of the Warrants.


 






     


    - 2 - 


    

 


Upon the due exercise of a Warrant, the Warrant
shall be deemed tendered for purposes thereof by the Holder without further notice or action by the Holder, and all rights under such
Warrant, other than the right to receive certificates representing the Common Shares to which the Holder is entitled on such exercise,
shall wholly cease and terminate and such Warrants shall be void and of no further effect or value.


 


Partial Exercise, Exchange and Replacement
of DRS (or Certificates)


 


The Warrants represented by this Warrant Certificate
may be exercised in whole or in part from time to time. If the Warrants are exercised in part, the Issuer shall deliver, with the Common
Shares issued pursuant to such exercise, a new Warrant Certificate representing the balance of the Warrants remaining unexercised.


 


This Warrant Certificate may be exchanged, upon
its surrender to the Issuer and payment of such administration fee, not exceeding $10.00, as the Issuer may require, for new Warrant Certificates
of like tenor in denominations which in the aggregate represent the number of Warrants represented hereby.


 


If this Warrant Certificate is lost, stolen, mutilated
or destroyed, the Issuer may on such reasonable terms as it may in its discretion impose, including but not limited to the payment of
any administration fee, not exceeding $10.00, and the provision of any indemnity by the Holder, issue and countersign a new Warrant Certificate
of like tenor, denomination and date as the Warrant Certificate so lost, stolen, mutilated or destroyed.


 


All Warrants shall rank pari passu, notwithstanding
the actual date of issue thereof.


 


Covenants


 


The Issuer covenants and agrees that so long as
any Warrants evidenced hereby remain outstanding, it shall reserve and there shall remain unissued out of its authorized capital a sufficient
number of Common Shares to satisfy the right of purchase herein provided for and such Common Shares shall be issued as fully paid and
non-assessable Common Shares and the holders thereof shall not be liable to the Issuer or to its creditors in respect thereof.


 


The
Issuer shall use all reasonable commercial efforts to preserve and maintain its corporate existence and to ensure that the Common Shares
outstanding or issuable from time to time upon the exercise of the Warrants are listed and posted for trading on the TSX (or such
other exchange on which the Common Shares may be listed), provided that this clause shall not be construed as limiting or restricting
the Issuer from completing a consolidation, amalgamation, arrangement, takeover bid or merger that would result in the Common Shares ceasing
to be listed and posted for trading on the TSX (or such other exchange on which the Common Shares may be listed), so long as the holders
of Common Shares receive securities of an entity which is listed on a stock exchange in Canada, or cash, or the holders of the Common
Shares have approved the transaction in accordance with the requirements of applicable corporate and securities laws and the policies
of the TSX (or such other exchange on which the Common Shares may be listed). In addition, the Issuer shall make all requisite filings
under applicable securities legislation necessary to remain a reporting issuer not in default.


 


If the issuance of the Common Shares upon the
exercise of the Warrants requires any filing or registration with or approval of any securities regulatory authority or other governmental
authority or compliance with any other requirement under any law before such Common Shares may be validly issued (other than the filing
of a prospectus or similar disclosure document), the Issuer agrees to take such actions as may be necessary to secure such filing, registration,
approval or compliance, as the case may be.


 


Transfer of Warrants


 


The Warrants are transferable and the term “Warrantholder”
shall mean and include any successor, transferee or assignee of the current or any future Warrantholder. The term “Warrantholder”
shall mean and include any successor of the Warrantholder. The Warrants may be transferred by the Warrantholder completing and delivering
to the Issuer the transfer form attached hereto as Schedule “B”.


 






     


    - 3 - 


    

 


Holding of Warrants


 


The Issuer may treat the Holder as the absolute
owner of the Warrants represented hereby for all purposes, and the Issuer shall not be affected by any notice or knowledge to the contrary
except where the Issuer is required to take notice by statute or by order of a court of competent jurisdiction.


 


Nothing in this Warrant Certificate or in the
holding of a Warrant evidenced hereby shall be construed as conferring upon the Holder any right or interest whatsoever as a shareholder
of the Issuer or entitle the Holder to any right or interest in respect of any Common Shares except as herein expressly provided.


 


Resale Restrictions and Legend Endorsed
on DRS (or Certificates)


 


The Warrants have been, and the Common Shares
will be, issued pursuant to an exemption (an “Exemption”) from the registration and prospectus requirements of applicable
securities law. To the extent that the Issuer relies on such Exemption, the Common Shares may be subject to restrictions on resale and
transferability contained in applicable securities laws.


 


If any of the Securities are subject to a hold
period, or any other restrictions on resale and transferability, the Issuer may place a legend on the certificates representing the Securities
as may be required under applicable securities laws, or as it may otherwise deem necessary or advisable.


 


Any certificate representing Common Shares issued
upon the exercise of this Warrant prior to the date which is four months after the Issue Date will bear the following legends:


 


UNLESS
PERMITTED UNDER SECURITIES LEGISLATION, THE HOLDER OF THIS SECURITY MUST NOT TRADE THE SECURITY BEFORE [l], 2021.


 


and


 


THE SECURITIES REPRESENTED BY THIS CERTIFICATE
ARE LISTED ON THE TORONTO STOCK EXCHANGE (“TSX”); HOWEVER, THE SECURITIES CANNOT BE TRADED THROUGH THE FACILITIES OF THE TSX
SINCE THEY ARE NOT FREELY TRANSFERABLE AND CONSEQUENTLY ANY CERTIFICATE REPRESENTING SUCH SECURITIES IS NOT “GOOD DELIVERY”
IN SETTLEMENT OF TRANSACTIONS ON THE TSX.


 


provided that at any time subsequent to the date
which is four months and one day after the date hereof any certificate representing such Common Shares may be exchanged for a certificate
bearing no such legends.


 


Capital Adjustments


 


Subject
to approval of the TSX (or such other exchange on which the Common Shares may be listed), if at any time after the date hereof
and prior to the expiry of the Warrants, and provided that any Warrants remain unexercised, there shall be:


 


		(a)	a reclassification of the Common Shares, a change in the Common Shares into other shares or securities,
a subdivision or consolidation of the Common Shares into a greater or lesser number of Common Shares, or any other capital reorganization,
or



 


		(b)	a consolidation, amalgamation or merger of the Issuer with or into any other corporation other than a
consolidation, amalgamation or merger which does not result in any reclassification of the outstanding Common Shares or a change of the
Common Shares into other shares or securities,



 


(any of such events being called a “Capital
Reorganization”) any Holders who shall thereafter acquire Common Shares pursuant to the Warrant shall be entitled to receive, at
no additional cost, and shall accept in lieu of the number of Common Shares to which such Holder was theretofore entitled to acquire upon
such exercise, the aggregate number of shares, other securities or other property which such Holder should have been entitled to receive
as a result of such Capital Reorganization if, on the effective date or record date thereof as the case may be, the Holder had been the
registered holder of the number of Common Shares to which such Holder was theretofore entitled to acquire upon exercise of the Warrants.
If determined appropriate by the Issuer acting reasonably, appropriate adjustments shall be made in the application of the provisions
set forth herein with respect to the rights and interests of the Holder relative to a Capital Reorganization, to the end that the provisions
set forth herein shall correspond as nearly as may be reasonably possible to the effect of the Capital Reorganization in relation to any
shares, other securities or other property thereafter deliverable upon the exercise of any Warrants.


 






     


    - 4 - 


    

 


In case at any time:


 


		(a)	the Issuer shall pay any dividend payable in stock upon its Common Shares or make any distribution to
the holders of its Common Shares;



 


		(b)	the Issuer shall offer for subscription pro rata to the holders of its Common Shares any additional shares
or stock of any class or other rights;



 


		(c)	there shall be any subdivision, consolidation, capital reorganization, or reclassification of the capital
stock of the Issuer, or merger, amalgamation or arrangement of the Issuer with, or sale of all or substantially all of its assets to,
another corporation; or



 


		(d)	there shall be a voluntary or involuntary dissolution, liquidation or winding-up of the Issuer,



 


the Issuer shall give to the Holder at least twenty
days’ prior written notice of the date on which the books of the Issuer shall close or a record shall be established for such dividend,
distribution or subscription rights, or for determining rights to vote with respect to such subdivision, consolidation, capital reorganization,
reclassification, merger, amalgamation, arrangement, sale, dissolution, liquidation or winding-up, and in the case of any such subdivision,
consolidation, capital reorganization, reclassification, merger, amalgamation, arrangement, sale, dissolution, liquidation or winding-up,
at least twenty days’ prior written notice of the date when the same shall take place. Such notice in accordance with the foregoing
clause shall also specify, in the case of any such dividend, distribution or subscription rights, the date on which the holders of Common
Shares shall be entitled thereto, and such notice in accordance with the foregoing shall also specify, in the case of any such subdivision,
consolidation, capital reorganization, reclassification, merger, amalgamation, arrangement, sale, dissolution, liquidation or winding-up,
the date on which the holders of Common Shares shall be entitled to exchange their Common Shares for securities or other property deliverable
upon such subdivision, consolidation, capital reorganization, reclassification, merger, amalgamation, arrangement, sale, dissolution,
liquidation or winding-up as the case may be. Each such written notice shall be given by first class mail, postage prepaid, addressed
to the Holder at its address as shown on the books of the Issuer.


 


In case the Issuer, after the date hereof, shall
take any action affecting any securities of the Issuer, other than as previously set out herein, which in the opinion of the directors
would materially affect the rights and interests of the Holder hereunder, the number of Common Shares or other securities which shall
be issuable on the exercise of the Warrants shall be adjusted in such manner, if any, and at such time as the directors, in their sole
discretion, may determine to be equitable in the circumstances, provided that no such adjustment will be made unless all necessary regulatory
approvals, if any, have been obtained. In the event of any question arising with respect to any adjustment provided for herein, such question
shall be conclusively determined by a firm of chartered accountants appointed by the Issuer at its sole discretion (who may be the Issuer’s
auditors) and any such determination shall be binding upon the Issuer and the Holder.


 


No
adjustment shall be made in respect of any event described herein if the Holder is entitled to participate in such event on the same terms,
without amendment, as if the Holder had exercised the Warrants prior to or on the effective date or record date of such event, subject
to the written consent of the TSX (or such other exchange on which the Common Shares may be listed). The adjustments provided for
herein are cumulative and such adjustments shall be made successively whenever an event referred to herein shall occur, subject to the
limitations provided for herein. No adjustment shall be made in the number or kind of Shares or other securities which may be acquired
on the exercise of a Warrant unless it would result in a change of at least one-tenth of a Share or other security. Any adjustment which
may by reason of this paragraph not be required to be made shall be carried forward and then taken into consideration in any subsequent
adjustment.


 






     


    - 5 - 


    

 


Notwithstanding any adjustments provided for herein
or otherwise, the Issuer shall not be required, upon the exercise of any Warrants, to issue fractional Common Shares or other securities
in satisfaction of its obligations hereunder and, except as provided for herein, any fractions shall be eliminated. To the extent that
the Holder would otherwise be entitled to acquire a fraction of a Common Share or other security, such right may be exercised in respect
of such fraction only in combination with other rights which in the aggregate entitle the Holder to acquire a whole number of Common Shares
or other securities. The Holder shall be entitled, upon the elimination of any fraction of a Common Share or other security, to be paid
in cash for the fair market value for the securities so eliminated, always provided that the Issuer shall not be required to make any
payment if for less than $10.00.


 


Representation and Warranty


 


The Issuer hereby represents and warrants with
and to the Holder that the Issuer is duly authorized and has the corporate and lawful power and authority to create and issue this Warrant
and the Common Shares issuable upon the exercise hereof and perform its obligations hereunder and that this Warrant represents a valid,
legal and binding obligation of the Issuer enforceable in accordance with its terms.


 


Miscellaneous Provisions


 


Any delivery or surrender of documents shall be
valid and effective if delivered personally or if sent by registered letter postage prepaid, and any notice shall be valid and effective
if made in writing and transmitted as aforementioned or if transmitted by facsimile with confirmed receipt, in each case addressed to:


 


		(a)	if to the Issuer,



 


ProMIS Neurosciences Inc.

Suite 200, 1920 Yonge Street

Toronto, Ontario

M4S 3E2


 


Facsimile: 416.847.6899


 


		(b)	if to the Holder, at its address appearing in the register of holders of Warrants maintained by the Issuer,



 


and such shall be deemed to have been effectively
made and received on the date of personal delivery, if delivered; on the fourth business day after the time of mailing or upon actual
receipt, whichever is sooner, if sent by registered letter (except the delivery of documents to exercise the Warrants, in which case actual
receipt is required); or on the first business day after the time of facsimile transmission, if sent by facsimile. In the case of a disruption
in postal services, any delivery or surrender of documents or notice sent by mail shall not be deemed to have been effectively made or
received until it is actually delivered. The Issuer and the Holder may from time to time change their address for service hereunder by
notice in writing delivered in one of the foregoing manners.


 


Except as herein provided, any and all of the
rights conferred upon the Holder herein may be enforced by the Holder through appropriate legal proceedings. No recourse under or upon
any covenant, obligation or agreement herein contained shall be had against any shareholder, officer or director of the Issuer, either
directly or through the Issuer, it being expressly agreed and declared that the obligations under the Warrants are solely corporate obligations
of the Issuer and no personal liability whatsoever shall attach to or be incurred by the shareholders, officers or directors of the Issuer
in respect thereof. This Warrant Certificate shall be binding upon the Issuer and its successors.


 


This Warrant shall be governed in accordance with
the laws of British Columbia and the laws of Canada applicable therein. The parties hereby attorn to the jurisdiction of the courts of
British Columbia in the event of any dispute hereunder. Time shall be of the essence hereof.


 


The Issuer shall be entitled to rely on delivery
of an executed Certificate by electronic means, and acceptance by the Holder of such electronic Certificate (including, without limitation
by facsimile or email delivery) shall be legally effective between the Holder and the Issuer in accordance with the terms hereof.


 






     


    - 6 - 


    

 





IN WITNESS WHEREOF the Issuer has caused this
Warrant Certificate to be signed by its duly authorized signatory on the date first written above.


 


	PROMIS NEUROSCIENCES INC.	 
	 	 
	 	 
	By:	 	 
	 	Authorized Signatory	 




 






     


     


    

 





SCHEDULE “A”

SUBSCRIPTION FORM


 


		TO:	ProMIS Neurosciences Inc.

Suite 200, 1920 Yonge Street

Toronto, Ontario

M4S 3E2



 


Facsimile: 416.847 6899


 


 


The Undersigned, being the registered holder of
the attached Warrant Certificate of the Issuer, does hereby irrevocably exercise  of the Warrants evidenced thereby in accordance
with the terms thereof, and accordingly hereby irrevocably subscribes for the Shares (as described therein) to be received thereon and
irrevocably surrenders the Warrant Certificate to the Issuer for such purpose. The Undersigned hereby irrevocably directs that the Shares
to be received by the Undersigned be registered as follows:


 


	Name in Full	Address	No. of

Common Shares
	1.	 	 
	 	 	 
	2.	 	 
	 	 	 
	3.	 	 
	 	 	 


 


IF
COMMON SHARES ARE TO BE ISSUED TO A PERSON OR PERSONS OTHER THAN THE UNDERSIGNED REGISTERED HOLDER, (I) THE SIGNATURE OF THE UNDERSIGNED
MUST BE MEDALLION GUARANTEED, (II) THE UNDERSIGNED MUST PAY TO THE ISSUER ALL APPLICABLE TAXES AND OTHER DUTIES
AND (III) THE TRANSFER FORM SET FORTH IN SCHEDULE “B” TO THE WARRANT CERTIFICATE MUST BE COMPLETED.


 


The Undersigned registered holder hereby represents,
warrants and certifies that:


 


		1.	the Undersigned is a resident at the address set forth in this Subscription Form;



 


		2.	the Undersigned acknowledges that the Warrants and Common Shares (collectively, the “Securities”)
have not been registered under the United States Securities Act of 1933, as amended (the “U.S. Securities Act”), or any applicable
State securities laws and may not be offered or sold in the United States or to U.S. Persons (as defined in Rule 902(k) of Regulation
S under the U.S. Securities Act) without registration under the U.S. Securities Act and any applicable State securities laws, unless an
exemption from registration is available; and



 


		3.	the Undersigned has no intention to distribute, either directly or indirectly, any of the Securities in
the United States or to U.S. Persons.



 


DATED the_____ day of _________, 20___.


 


	 	
    }

    }

    }

    }

    }

    }

    }

    }

    }

    }

    }

    }

    }
	
     

     

	Signature of Witness

[Please Note Instruction 2]	
    Signature of registered holder or Signatory thereof

     

	 	
    If applicable, print Name and Office of Signatory

     

	Print Name of Witness	
    Print Name of registered holder as on certificate

     

	Address of Witness	
    Street Address

     

	Occupation of Witness	City, Province and Postal Code


 






     


    - 2 - 


    

 


INSTRUCTIONS:


 


1.       The
registered holder of a Warrant may exercise its right to convert the Warrant into Shares by completing and surrendering this Subscription
Form and the ORIGINAL Warrant Certificate representing the Warrants being converted to the Issuer, together with the aggregate amount
of the exercise price for the Shares, as provided for in the Warrant Certificate. DRS (or Certificates) representing the Shares to be
acquired on exercise will be sent by prepaid ordinary mail to the address(es) above within five business days after the receipt of all
required documentation.


 


2.       If
this Subscription Form indicates that Shares are to be issued to a person or persons other than the registered holder of the Warrant to
be converted: (i) the signature of the registered holder on this Subscription Form must be medallion guaranteed by an authorized officer
of a chartered bank, trust company or an investment dealer who is a member of a recognized stock exchange, and (ii) the registered holder
must pay to the Issuer all applicable taxes and other duties and (iii) the Transfer Form set forth in Schedule “B” to the
Warrant Certificate must be completed.


 


3.       If
this Subscription Form is signed by a trustee, executor, administrator, custodian, guardian, attorney, officer of a corporation or any
other person acting in a fiduciary or representative capacity, this Subscription Form must be accompanied by evidence of authority to
sign satisfactory to the Issuer.


 






     


     


    

 





SCHEDULE “B”

FORM OF TRANSFER


 


FOR VALUE RECEIVED, the undersigned hereby sells,
assigns and transfers unto________________________________________________________________________________________________________________(include name and address of the transferee) Warrants exercisable for common shares of ProMIS Neurosciences Inc. (the “Corporation”)
registered in the name of the undersigned on the register of the Corporation maintained therefor, and hereby irrevocably appoints_____________________ 
the attorney of the undersigned to transfer the said securities on the books maintained by the Corporation with full power of substitution.


 


DATED this _______ day of ___________________,
20___.


 


 


Signature of Transferor guaranteed by:


 


	 	 	 
	Medallion Signature Guarantee	 	Signature of Transferor
	Stamp of Transferor	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	Address of Transferor




 


The undersigned transferee hereby certifies that:


 


(check one)


 


		 ̈	said transferee was not offered the Warrants in the United States
and is not in the United States or a “U.S. Person” (as defined in Regulation S under the United States Securities Act
of 1933, as amended (the “U.S. Securities Act”)), and is not acquiring the Warrants for the account or benefit of a person
in the United States or a U.S. Person; or



 


		 ̈	enclosed herewith is an opinion of counsel (which the transferee
understands must be satisfactory to the Corporation) to the effect that no violation of the U.S. Securities Act or applicable securities
laws will result from transfer, exercise or deemed exercise of the Warrants.



 


It is understood
that the Corporation may require additional evidence necessary to verify the foregoing.


 


Notes:


		1.	The signature to this transfer must correspond with the name written upon the face of this Warrant Certificate
in every particular without any changes whatsoever.



 


		2.	If the Transfer Form indicates that common shares are to be issued to a person or persons other than the
registered holder of the Warrant Certificate, the signature on this Transfer Form must be guaranteed by a Canadian chartered bank, or
eligible guarantor institution with membership in an approved signature guarantee medallion program. The guarantor must affix a stamp
bearing the actual words “Signature Guaranteed”.