Exhibit 4.3


 


THE WARRANT AND WARRANT SHARES SHALL NOT BE SOLD, TRANSFERRED, ASSIGNED, PLEDGED, OR HYPOTHECATED, OR
BE THE SUBJECT OF ANY HEDGING, SHORT SALE, DERIVATIVE, PUT, OR CALL TRANSACTION THAT WOULD RESULT IN THE EFFECTIVE ECONOMIC DISPOSITION
OF THE SECURITIES BY ANY PERSON FOR A PERIOD OF 180 DAYS IMMEDIATELY FOLLOWING THE DATE THE WARRANTS WERE ISSUED, EXCEPT AS PROVIDED
IN FINRA RULE 5110(G)(2).


 


THE WARRANT AND WARRANT SHARES MAY NOT
BE OFFERED OR SOLD IN HONG KONG BY MEANS OF ANY DOCUMENT OTHER THAN (I) IN CIRCUMSTANCES WHICH DO NOT CONSTITUTE AN OFFER TO THE
PUBLIC WITHIN THE MEANING OF THE COMPANIES (WINDING UP AND MISCELLANEOUS PROVISIONS) ORDINANCE (CAP. 32, LAWS OF HONG KONG), OR
(II) TO “PROFESSIONAL INVESTORS” (AS DEFINED IN THE SECURITIES AND FUTURES ORDINANCE (CAP. 571, LAWS OF HONG KONG)),
OR (III) IN OTHER CIRCUMSTANCES WHICH DO NOT RESULT IN THE DOCUMENT BEING A “PROSPECTUS” WITHIN THE MEANING OF THE
COMPANIES (WINDING UP AND MISCELLANEOUS PROVISIONS) ORDINANCE (CAP. 32, LAWS OF HONG KONG) AND NO ADVERTISEMENT, INVITATION OR
DOCUMENT RELATING TO THE SECURITIES MAY BE ISSUED OR MAY BE IN THE POSSESSION OF ANY PERSON FOR THE PURPOSE OF ISSUE (IN EACH CASE
WHETHER IN HONG KONG OR ELSEWHERE), WHICH IS DIRECTED AT, OR THE CONTENTS OF WHICH ARE LIKELY TO BE ACCESSED OR READ BY, THE PUBLIC
IN HONG KONG (EXCEPT IF PERMITTED TO DO SO UNDER THE LAWS OF HONG KONG) OTHER THAN WITH RESPECT TO THE SECURITIES WHICH ARE OR
ARE INTENDED TO BE DISPOSED OF ONLY TO PERSONS OUTSIDE HONG KONG OR ONLY TO “PROFESSIONAL INVESTORS” AS DEFINED IN
THE SECURITIES AND FUTURES ORDINANCE (CAP. 571, LAWS OF HONG KONG).


 


APTORUM GROUP LIMITED


 


Warrant
To Purchase Class A Ordinary Shares


 


Warrant No.: __________


Date of Issuance: [    ]1, 2018
(“Issuance Date”)


 


Aptorum Group Limited,
a Cayman Islands company (the “Company”), hereby certifies that, for good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, Boustead Securities, LLC, the registered holder hereof or its permitted
assigns (the “Holder”), is entitled, subject to the terms set forth below, to purchase from the Company, at
the Exercise Price (as defined below) then in effect, upon exercise of this Warrant to Purchase Class A Ordinary Shares with par
value USD$1.00 each (including any Warrants to purchase shares issued in exchange, transfer or replacement hereof, the “Warrant”),
at any time or times on or after the date on which the IPO (as defined herein below) is consummated and of the commencement of
trading on a U.S. national securities exchange of the Company’s securities to be issued in such offering, to the extent permitted
by the applicable SEC and FINRA rules, but not after 11:59 p.m., Eastern Time, on the Expiration Date (as defined below), [number]2
(subject to adjustment as provided herein) fully paid and non-assessable shares of Class A Shares (the “Warrant Shares”).
The Warrant Shares shall not be transferable (except for the transfer to the Holder’s Affiliates) or otherwise disposed of
until 180 days following the Issuance Date, except as may otherwise be permitted by FINRA Rule 5110. Except as otherwise defined
herein, capitalized terms in this Warrant shall have the meanings set forth in Section 17. This Warrant is issued pursuant to that
certain Engagement Agreement, dated as of August 24, 2017, and its amendment, dated as of May 11, 2018, by and between the Company
and Boustead Securities, LLC and in connection with the initial public offering of the Company’s Class A Shares contemplated
by that certain Underwriting Agreement, dated as of [ ], 2018, by and between the Company and the Holder (the “Underwriting
Agreement”).


 


 


 



	1	The issuance date shall be the date of the effective date of the registration statement on Form F-1 for the IPO.




	2	Shall initially equal to five percent
(5.0%) of the number of Class A Ordinary Shares issued to the investors sourced by the Company and/or sourced by the Holder at
the IPO up to the Boustead Planned Commission Threshold, as defined in the Underwriting Agreement. In the event that at IPO, Boustead’s
cash fees exceed Boustead Planned Commission Threshold, the UW warrants for proceeds sourced by Boustead will be three percent
(3.0%) of the number of Class A Ordinary Shares issued to the investors sourced by Boustead on the portion exceeding the Boustead
Planned Commission Threshold. In addition, the Holder shall receive warrant shares equal to two percent (2%) of the shares issued
to the investors sourced by China Renaissance Securities (Hong Kong) Limited on the portion exceeding the CR Planned Commission
Threshold. 








 






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1.
EXERCISE OF WARRANT.

 


(a) Mechanics of
Exercise. Subject to the terms and conditions hereof, this Warrant may be exercised by the Holder on any day on or after the
Issuance Date and of the commencement of trading on a U.S. national securities exchange of the Company’s securities to be
issued in such offering, to the extent permitted by the applicable SEC and FINRA rules, in whole or in part, by delivery (whether
via facsimile or otherwise) of a written notice, in the form attached hereto as Exhibit A (the “Exercise Notice”),
of the Holder’s election to exercise this Warrant, by submitting information including the then-applicable Exercise Price,
number of Warrant Shares purchased equal to or lower than the then-applicable number of Warrant Shares and the 20-day average
Closing Sale Price (collectively, the “Exercise Information”). Within one (1) Trading Day following an exercise
of this Warrant as aforesaid, the Holder shall deliver payment to the Company of an amount equal to the Exercise Price in effect
on the date of such exercise multiplied by the number of Warrant Shares as to which this Warrant was so exercised (the “Aggregate
Exercise Price”) in cash or via wire transfer of immediately available funds if, subject to the provisions of Section
1(d), the Holder has not notified the Company in such Exercise Notice that such exercise is made pursuant to a Cashless Exercise
(as defined in Section 1(d)) at a time and under circumstances which permit a Cashless Exercise. The Holder shall not be required
to deliver the original of this Warrant in order to effect an exercise hereunder. Execution and delivery of an Exercise Notice
with respect to less than all of the Warrant Shares shall have the same effect as cancellation of the original of this Warrant
and issuance of a new Warrant evidencing the right to purchase the remaining number of Warrant Shares. Execution and delivery
of an Exercise Notice for all of the then-remaining Warrant Shares shall have the same effect as cancellation of the original
of this Warrant after delivery of the Warrant Shares in accordance with the terms hereof. On or before the second (2nd)
Trading Day following the date on which the Company has received an Exercise Notice, upon checking that the Exercise Information
supplied by the Holder is accurate, the Company shall transmit by facsimile or email an acknowledgment of confirmation of receipt
of such Exercise Notice, in the form attached hereto as Exhibit B, to the Holder and the Company’s transfer
agent (the “Transfer Agent”). On or before the third (3rd) Trading Day following the date on which
the Company has received such Exercise Notice and, in the event that the Holder has chosen to exercise in cash, the receipt of
the payment of the Aggregate Exercise Price, the Company shall (X) provided that the Transfer Agent is participating in The Depository
Trust Company (“DTC”) Fast Automated Securities Transfer Program, upon the request of the Holder, credit such
aggregate number of shares of Class A Shares to which the Holder is entitled pursuant to such exercise to the Holder’s or
its designee’s balance account with DTC through its Deposit/Withdrawal at Custodian system, or (Y) if the Transfer Agent
is not participating in the DTC Fast Automated Securities Transfer Program, issue and mail to the Holder or, at the Holder’s
instruction pursuant to the Exercise Notice, the Holder’s agent or designee, in each case, sent by reputable overnight courier
to the address as specified in the applicable Exercise Notice, a certificate, registered in the Company’s share register
in the name of the Holder or its designee (as indicated in the applicable Exercise Notice), for the number of shares of Class
A Shares to which the Holder is entitled pursuant to such exercise. Upon delivery of an Exercise Notice and in the event that
the Holder has chosen to exercise in cash, the Company’s receipt of the payment of the Aggregate Exercise Price, the Holder
shall be deemed for all corporate purposes to have become the holder of record of the Warrant Shares with respect to which this
Warrant has been exercised, irrespective of the date such Warrant Shares are credited to the Holder’s DTC account or the
date of delivery of the certificates evidencing such Warrant Shares (as the case may be). If this Warrant is submitted in connection
with any exercise pursuant to this Section 1(a) and the total number of Warrant Shares represented by this Warrant is greater
than the number of Warrant Shares being acquired by the Holder upon an exercise, then, at the request of the Holder, the Company
shall as soon as practicable and in no event later than five (5) Business Days after any exercise and at its own expense, issue
and deliver to the Holder (or its designee) a new Warrant (in accordance with Section 7(d)) representing the right to purchase
the number of Warrant Shares purchasable immediately prior to such exercise under this Warrant, less the number of Warrant Shares
with respect to which this Warrant is exercised. No fractional shares of Class A Shares are to be issued upon the exercise of
this Warrant, but rather the number of shares of Class A Shares to be issued shall be rounded up to the nearest whole number.
The Company will from time to time promptly pay all taxes and charges that may be imposed upon the Company in respect of the issuance
or delivery of Class A Shares upon the exercise of this Warrant, but the Company shall not be obligated to pay any transfer taxes
in respect of this Warrant or such shares.


 






    2


     


    

 


(b) Exercise Price.
For purposes of this Warrant, “Exercise Price” means an exercise price at 120% of the actual price per Class
A Share to be issued in an initial public offering where the Class A Shares of the Company are to be trading on a U.S. national
stock exchange (“IPO”), subject to adjustment as provided herein.


 


(c) Company’s
Failure to Timely Deliver Securities. If the Company shall fail, for any reason or for no reason, to issue to the Holder within
five (5) Trading Days after receipt of the applicable Exercise Notice, a certificate for the number of shares of Class A Shares
to which the Holder is entitled and register such shares of Class A Shares on the Company’s share register or to credit the
Holder’s balance account with DTC for such number of shares of Class A Shares to which the Holder is entitled upon the Holder’s
exercise of this Warrant (as the case may be), the Holder will have the right to rescind such exercise. In addition to any other
rights available to the Holder, if the Company shall fail, for any reason or for no reason, to issue to the Holder within five
(5) Trading Days after receipt of the applicable Exercise Notice, a certificate for the number of shares of Class A Shares to which
the Holder is entitled and register such shares of Class A Shares on the Company’s share register or to credit the Holder’s
balance account with DTC for such number of shares of Class A Shares to which the Holder is entitled upon the Holder’s exercise
of this Warrant (as the case may be) and if on or after such fifth (5th ) Trading Day the Holder (or any other Person
in respect, or on behalf, of the Holder) purchases (in an open market transaction or otherwise) shares of Class A Shares to deliver
in satisfaction of a sale by the Holder of all or any portion of the number of shares of Class A Shares, or a sale of a number
of shares of Class A Shares equal to all or any portion of the number of shares of Class A Shares, issuable upon such exercise
that the Holder so anticipated receiving from the Company, then, in addition to all other remedies available to the Holder, the
Company shall, within three (3) Business Days after the Holder’s request and in the Holder’s discretion, either (i)
pay cash to the Holder in an amount equal to the Holder’s total purchase price (including reasonable brokerage commissions
and other reasonable out-of-pocket expenses, if any) for the shares of Class A Shares so purchased (including, without limitation,
by any other Person in respect, or on behalf, of the Holder) (the “Buy-In Price”), at which point the Company’s
obligation to so issue and deliver such certificate or credit the Holder’s balance account with DTC for the number of shares
of Class A Shares to which the Holder is entitled upon the Holder’s exercise hereunder (as the case may be) (and to issue
such shares of Class A Shares) shall terminate, or (ii) promptly honor its obligation to so issue and deliver to the Holder a certificate
or certificates representing such shares of Class A Shares or credit the Holder’s balance account with DTC for the number
of shares of Class A Shares to which the Holder is entitled upon the Holder’s exercise hereunder (as the case may be) and
pay cash to the Holder in an amount equal to the excess (if any) of the Buy-In Price over the product of (A) such number of shares
of Class A Shares multiplied by (B) the lowest Closing Sale Price of the Class A Shares on any Trading Day during the period commencing
on the date of the applicable Exercise Notice and ending on the date of such issuance and payment under this clause (ii).


 






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(d) Cashless Exercise.
Notwithstanding anything contained herein to the contrary, the Holder may, in its sole discretion, exercise this Warrant in whole
or in part and, in lieu of making the cash payment otherwise contemplated to be made to the Company upon such exercise in payment
of the Aggregate Exercise Price, elect instead to receive upon such exercise the “Net Number” of shares of Class A
Shares determined according to the following formula (a “Cashless Exercise”), provided that the Holder may elect
to cashless exercise pursuant to this Section 1(d) only if B as set forth in the following formula is higher than C as set forth
in the following formula:


  


	 	Net Number =	(A x B) - (A x C)	 
	 	 	B	 


 


For purposes of the
foregoing formula:


 


A= the total number of shares with
respect to which this Warrant is then being exercised.


 


B= as applicable: (i) the average
trading price per share as quoted on the stock exchange where the Company’s Class A Shares are listed, for the twenty (20)
trading days prior to the day the applicable Exercise Notice is submitted.


 


C= the
Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise.


 


(e) Disputes.
In the case of a dispute as to the determination of the Exercise Price or the arithmetic calculation of the number of Warrant Shares
to be issued pursuant to the terms hereof, the Company shall promptly issue to the Holder the number of Warrant Shares that are
not disputed and resolve such dispute in accordance with Section 14.


 






    4


     


    

 


(f) Intentionally
Left Blank.


 


(g) Insufficient
Authorized Shares. The Company shall at all times keep reserved for issuance under this Warrant a number of shares of Class
A Shares as shall be necessary to satisfy the Company’s obligation to issue shares of Class A Shares hereunder (without regard
to any limitation otherwise contained herein with respect to the number of shares of Class A Shares that may be acquirable upon
exercise of this Warrant). If, notwithstanding the foregoing, and not in limitation thereof, at any time while the Warrant remains
outstanding the Company does not have a sufficient number of authorized and unreserved shares of Class A Shares to satisfy its
obligation to reserve for issuance upon exercise of the Warrant at least a number of shares of Class A Shares equal to the number
of shares of Class A Shares as shall from time to time be necessary to effect the exercise of the Warrant then outstanding (the
“Required Reserve Amount”) (an “Authorized Share Failure”), then the Company shall immediately
take all action necessary to increase the Company’s authorized shares of Class A Shares to an amount sufficient to allow
the Company to reserve the Required Reserve Amount for the Warrant then outstanding. Without limiting the generality of the foregoing
sentence, as soon as practicable after the date of the occurrence of an Authorized Share Failure, but in no event later than sixty
(60) days after the occurrence of such Authorized Share Failure, the Company shall hold a meeting of its stockholders for the approval
of an increase in the number of authorized shares of Class A Shares. In connection with such meeting, the Company shall provide
each stockholder with a proxy statement and shall use its best efforts to solicit its stockholders’ approval of such increase
in authorized shares of Class A Shares and to cause its board of directors to recommend to the stockholders that they approve such
proposal.


 


2. ADJUSTMENT OF EXERCISE PRICE AND NUMBER OF WARRANT SHARES. The Exercise Price and number of Warrant
Shares issuable upon exercise of this Warrant are subject to adjustment from time to time as set forth in this Section 2.


 


(a) Stock
Dividends and Splits. Without limiting any provision of Section 4, if the Company, at any time on or after the Issuance Date,
(i) pays a stock dividend on one or more classes of its then outstanding shares of Class A Shares or otherwise makes a distribution
on any class of capital stock that is payable in shares of Class A Shares, (ii) subdivides (by any stock split, stock dividend,
recapitalization or otherwise) one or more classes of its then outstanding shares of Class A Shares into a larger number of shares
or (iii) combines (by combination, reverse stock split or otherwise) one or more classes of its then outstanding shares of Class
A Shares into a smaller number of shares, then in each such case the Exercise Price shall be multiplied by a fraction of which
the numerator shall be the number of shares of Class A Shares outstanding immediately before such event and of which the denominator
shall be the number of shares of Class A Shares outstanding immediately after such event. Any adjustment made pursuant to clause
(i) of this paragraph shall become effective immediately after the record date for the determination of stockholders entitled to
receive such dividend or distribution, and any adjustment pursuant to clause (ii) or (iii) of this paragraph shall become effective
immediately after the effective date of such subdivision or combination. If any event requiring an adjustment under this paragraph
occurs during the period that an Exercise Price is calculated hereunder, then the calculation of such Exercise Price shall be adjusted
appropriately to reflect such event.


 






    5


     


    

 


(b) Exceptions
to Adjustment. Notwithstanding the provisions of Sections 2(a), no adjustment to the Exercise Price shall be effected as a
result of an Excepted Issuance. “Excepted Issuances” shall mean, collectively, (i) the Company’s
issuance of Class A Shares in connection with strategic license agreements and other partnering arrangements so long as such issuances
are not for the purpose of raising capital and in which holders of such securities or debt are not at any time granted registration
rights; (ii) the Company’s issuance of Class A Shares or the issuances or grants of options to purchase Class A Shares to
employees, directors, and consultants, so long as the issuance does not exceed 8% of the total outstanding shares of Class A Shares
per annum; (iii) securities issued (other than for cash) in connection with a merger, acquisition, or consolidation, (iv) securities
issued pursuant to the conversion or exercise of convertible or exercisable securities issued or outstanding on or prior to the
date of the Underwriting Agreement, (v) any securities, including the bond, the Series A notes, the placement agent warrants and
the underwriter warrants, as well as any shares of Class A Shares issued as interest payment on the bond and Series A notes, issued
pursuant to the Engagement Letter (so long as the conversion or exercise price in such securities are not amended to lower such
price and/or adversely affect the Holders), (v) the Class A Shares underlying the bond and Series A notes, the placement agent
warrants and the underwriter warrants, and (vi) any Class A Shares issued as payment of dividends.


 


(c) Number
of Warrant Shares. Simultaneously with any adjustment to the Exercise Price pursuant to only paragraph (a) of this Section
2, the number of Warrant Shares that may be purchased upon exercise of this Warrant shall be increased or decreased proportionately,
so that after such adjustment the aggregate Exercise Price payable hereunder for the adjusted number of Warrant Shares shall be
the same as the aggregate Exercise Price in effect immediately prior to such adjustment (without regard to any limitations on exercise
contained herein).


 


(d) Other
Events. In the event that the Company (or any subsidiary of the Company) shall take any action to which the provisions hereof
are not strictly applicable, or, if applicable, would not operate to protect the Holder from dilution or if any event occurs of
the type contemplated by the provisions of this Section 2 but not expressly provided for by such provisions (including, without
limitation, the granting of stock appreciation rights, phantom stock rights or other rights with equity features), then the Company’s
board of directors shall in good faith determine and implement an appropriate adjustment in the Exercise Price and the number of
Warrant Shares (if applicable) so as to protect the rights of the Holder, provided that no such adjustment pursuant to this Section
2(d) will increase the Exercise Price or decrease the number of Warrant Shares as otherwise determined pursuant to this Section
2, provided further that if the Holder does not accept such adjustments as appropriately protecting its interests hereunder against
such dilution, then the Company’s board of directors and the Holder shall agree, in good faith, upon an independent investment
bank of nationally recognized standing to make such appropriate adjustments, whose determination shall be final and binding and
whose fees and expenses shall be borne by the Company.


 


(e) Calculations.
All calculations under this Section 2 shall be made by rounding to the nearest cent or the nearest 1/100th of a share,
as applicable. The number of shares of Class A Shares outstanding at any given time shall not include shares owned or held by or
for the account of the Company, and the disposition of any such shares shall be considered an issue or sale of Class A Shares.


 






    6


     


    

 


3.
   RIGHTS UPON DISTRIBUTION OF ASSETS. In addition to any adjustments pursuant to Section 2 above, if the
Company shall declare or make any dividend or other distribution of its assets (or rights to acquire its assets) to holders of
shares of Class A Shares, by way of return of capital or otherwise (including, without limitation, any distribution of cash, stock
or other securities, property or options by way of a dividend, spin off, reclassification, corporate rearrangement, scheme of arrangement
or other similar transaction) (a “Distribution”), at any time after the issuance of this Warrant, then, in each
such case, the Holder shall be entitled to participate in such Distribution to the same extent that the Holder would have participated
therein if the Holder had held the number of shares of Class A Shares acquirable upon a complete exercise of this Warrant (without
regard to any limitations on exercise hereof) immediately before the date on which a record is taken for such Distribution, or,
if no such record is taken, the date as of which the record holders of shares of Class A Shares are to be determined for the participation
in such Distribution.


 


4.
PURCHASE RIGHTS; FUNDAMENTAL TRANSACTIONS.

 


(a) Purchase Rights.
In addition to any adjustments pursuant to Section 2 above, if at any time while the Warrant remains outstanding and before the
Expiration Date, the Company grants, issues or sells any Options, Convertible Securities or rights to purchase stock, warrants,
securities or other property pro rata to the record holders of any class of shares of Class A Shares (the “Purchase Rights”),
then the Holder will be entitled to acquire, upon the terms applicable to such Purchase Rights, the aggregate Purchase Rights which
the Holder could have acquired if the Holder had held the number of shares of Class A Shares acquirable upon a complete exercise
of this Warrant (without regard to any limitations on exercise hereof) immediately before the date on which a record is taken for
the grant, issuance or sale of such Purchase Rights, or, if no such record is taken, the date as of which the record holders of
shares of Class A Shares are to be determined for the grant, issue or sale of such Purchase Rights.


 






    7


     


    

 


(b) Fundamental
Transactions. During the term of this Warrant, the Company shall not enter into or be party to a Fundamental Transaction unless
(i)  the Successor Entity assumes in writing all of the obligations of the Company under this Warrant and the other Transaction
Documents (as defined in the Underwriting Agreement) in accordance with the provisions of this Section 4(b) pursuant to written
agreements in form and substance reasonably satisfactory to the Holder and approved by the Holder prior to such Fundamental Transaction,
such approval not to be unreasonably withheld, conditioned or delayed, including agreements to deliver to the Holder in exchange
for this Warrant a security of the Successor Entity evidenced by a written instrument substantially similar in form and substance
to this Warrant, including, without limitation, which is exercisable for a corresponding number of shares of capital stock equivalent
to the shares of Class A Shares acquirable and receivable upon exercise of this Warrant (without regard to any limitations on the
exercise of this Warrant) prior to such Fundamental Transaction, and with an exercise price which applies the exercise price hereunder
to such shares of capital stock (but taking into account the relative value of the shares of Class A Shares pursuant to such Fundamental
Transaction and the value of such shares of capital stock, such adjustments to the number of shares of capital stock and such exercise
price being for the purpose of protecting the economic value of this Warrant immediately prior to the consummation of such Fundamental
Transaction) and (ii) the Successor Entity (including its Parent Entity) is a publicly traded corporation whose Class A Shares
is quoted on or listed for trading on an Eligible Market. Upon the consummation of each Fundamental Transaction, the Successor
Entity shall succeed to, and be substituted for (so that from and after the date of the applicable Fundamental Transaction, the
provisions of this Warrant and the other Transaction Documents referring to the “Company” shall refer instead to the
Successor Entity), and may exercise every right and power of the Company and shall assume all of the obligations of the Company
under this Warrant and the other Transaction Documents with the same effect as if such Successor Entity had been named as the Company
herein. Upon consummation of each Fundamental Transaction, the Successor Entity shall deliver to the Holder confirmation that there
shall be issued upon exercise of this Warrant at any time after the consummation of the applicable Fundamental Transaction, in
lieu of the shares of Class A Shares (or other securities, cash, assets or other property (except such items still issuable under
Sections 3 and 4(a) above, which shall continue to be receivable thereafter)) issuable upon the exercise of this Warrant prior
to the applicable Fundamental Transaction, such shares of publicly traded Class A Shares (or its equivalent) of the Successor Entity
(including its Parent Entity) which the Holder would have been entitled to receive upon the happening of the applicable Fundamental
Transaction had this Warrant been exercised immediately prior to the applicable Fundamental Transaction (without regard to any
limitations on the exercise of this Warrant), as adjusted in accordance with the provisions of this Warrant. Notwithstanding the
foregoing, the Holder may elect, at its sole option, by delivery of written notice to the Company to waive this Section 4(b) to
permit the Fundamental Transaction without the assumption of this Warrant. In addition to and not in substitution for any other
rights hereunder, prior to the consummation of each Fundamental Transaction pursuant to which holders of shares of Class A Shares
are entitled to receive securities or other assets with respect to or in exchange for shares of Class A Shares (a “Corporate
Event”), the Company shall make appropriate provision to insure that the Holder will thereafter have the right to receive
upon an exercise of this Warrant at any time after the consummation of the applicable Fundamental Transaction but prior to the
Expiration Date, in lieu of the shares of the Class A Shares (or other securities, cash, assets or other property (except such
items still issuable under Sections 3 and 4(a) above, which shall continue to be receivable thereafter)) issuable upon the exercise
of the Warrant prior to such Fundamental Transaction, such shares of stock, securities, cash, assets or any other property whatsoever
(including warrants or other purchase or subscription rights) which the Holder would have been entitled to receive upon the happening
of the applicable Fundamental Transaction had this Warrant been exercised immediately prior to the applicable Fundamental Transaction
(without regard to any limitations on the exercise of this Warrant). Provision made pursuant to the preceding sentence shall be
in a form and substance reasonably satisfactory to the Holder.


 


(c) Application.
The provisions of this Section 4 shall apply similarly and equally to successive Fundamental Transactions and Corporate Events
and shall be applied as if this Warrant (and any such subsequent warrants) were fully exercisable and without regard to any limitations
on the exercise of this Warrant.


 






    8


     


    

 


5. NONCIRCUMVENTION.
The Company hereby covenants and agrees that the Company will not, by amendment of its Second Amended and Restated Memorandum
and Articles of Association or through any reorganization, transfer of assets, consolidation, merger, scheme of arrangement,
dissolution, issue or sale of securities, or any other voluntary action, avoid or seek to avoid the observance or performance
of any of the terms of this Warrant, and will at all times in good faith carry out all the provisions of this Warrant and
take all action as may be required to protect the rights of the Holder. Without limiting the generality of the foregoing, the
Company (a) shall not increase the par value of any shares of Class A Shares receivable upon the exercise of this
Warrant above the Exercise Price then in effect, (b) shall take all such actions as may be necessary or appropriate in
order that the Company may validly and legally issue fully paid and non-assessable shares of Class A Shares upon the
exercise of this Warrant, and (c) shall, so long as the Warrant is outstanding, take all action necessary to reserve and keep
available out of its authorized and unissued shares of Class A Shares, solely for the purpose of effecting the exercise of
the Warrant, the maximum number of shares of Class A Shares as shall from time to time be necessary to effect the exercise of
the Warrant then outstanding (without regard to any limitations on exercise).


 


6. WARRANT HOLDER NOT DEEMED A STOCKHOLDER. Except as otherwise specifically provided herein, the Holder,
solely in its capacity as a holder of this Warrant, shall not be entitled to vote or receive dividends or be deemed the holder
of share capital of the Company for any purpose, nor shall anything contained in this Warrant be construed to confer upon the Holder,
solely in its capacity as the Holder of this Warrant, any of the rights of a stockholder of the Company or any right to vote, give
or withhold consent to any corporate action (whether any reorganization, issue of stock, reclassification of stock, consolidation,
merger, conveyance or otherwise), receive notice of meetings, receive dividends or subscription rights, or otherwise, prior to
the issuance to the Holder of the Warrant Shares which it is then entitled to receive upon the due exercise of this Warrant. In
addition, nothing contained in this Warrant shall be construed as imposing any liabilities on the Holder to purchase any securities
(upon exercise of this Warrant or otherwise) or as a stockholder of the Company, whether such liabilities are asserted by the Company
or by creditors of the Company. Notwithstanding this Section 6, the Company shall provide the Holder with copies of the same notices
and other information given to the stockholders of the Company generally, contemporaneously with the giving thereof to the stockholders.


 


7. REISSUANCE OF WARRANTS.


 


(a) Transfer
of Warrant. If this Warrant is to be transferred, the Holder shall surrender this Warrant to the Company, whereupon the Company
will forthwith issue and deliver upon the order of the Holder a new Warrant (in accordance with Section 7(d)), registered as the
Holder may request, representing the right to purchase the number of Warrant Shares being transferred by the Holder and, if less
than the total number of Warrant Shares then underlying this Warrant is being transferred, a new Warrant (in accordance with Section
7(d)) to the Holder representing the right to purchase the number of Warrant Shares not being transferred.


 


(b) Lost,
Stolen or Mutilated Warrant. Upon receipt by the Company of evidence reasonably satisfactory to the Company of the loss, theft,
destruction or mutilation of this Warrant (as to which a written certification and the indemnification contemplated below shall
suffice as such evidence), and, in the case of loss, theft or destruction, of any indemnification undertaking by the Holder to
the Company in customary and reasonable form and, in the case of mutilation, upon surrender and cancellation of this Warrant, the
Company shall execute and deliver to the Holder a new Warrant (in accordance with Section 7(d)) representing the right to purchase
the Warrant Shares then underlying this Warrant.


 






    9


     


    

 


(c) Exchangeable
for Multiple Warrants. This Warrant is exchangeable, upon the surrender hereof by the Holder at the principal office of the
Company, for a new Warrant or Warrants (in accordance with Section 7(d)) representing in the aggregate the right to purchase the
number of Warrant Shares then underlying this Warrant, and each such new Warrant will represent the right to purchase such portion
of such Warrant Shares as is designated by the Holder at the time of such surrender; provided, however, no warrants for fractional
shares of Class A Shares shall be given.


 


(d) Issuance
of New Warrants. Whenever the Company is required to issue a new Warrant pursuant to the terms of this Warrant, such new Warrant
(i) shall be of like tenor with this Warrant, (ii) shall represent, as indicated on the face of such new Warrant, the right to
purchase the Warrant Shares then underlying this Warrant (or in the case of a new Warrant being issued pursuant to Section 7(a)
or Section 7(c), the Warrant Shares designated by the Holder which, when added to the number of shares of Class A Shares underlying
the other new Warrants issued in connection with such issuance, does not exceed the number of Warrant Shares then underlying this
Warrant), (iii) shall have an issuance date, as indicated on the face of such new Warrant which is the same as the Issuance Date,
and (iv) shall have the same rights and conditions as this Warrant.


 


8.
NOTICES; CURRENCY; PAYMENTS.



 


(a) Whenever
notice is required to be given under this Warrant, unless otherwise provided herein, such notice shall be given in accordance with
the Engagement Agreement. The Company shall provide the Holder with prompt written notice of all actions taken pursuant to this
Warrant, including in reasonable detail a description of such action and the reason therefor. Without limiting the generality of
the foregoing, the Company will give written notice to the Holder (i) immediately upon each adjustment of the Exercise Price and
the number of Warrant Shares, setting forth in reasonable detail, and certifying, the calculation of such adjustment(s) and (ii)
at least fifteen (15) days prior to the date on which the Company closes its books or takes a record (A) with respect to any dividend
or distribution upon the shares of Class A Shares, (B) with respect to any grants, issuances or sales of any Options, Convertible
Securities or rights to purchase stock, warrants, securities or other property to holders of shares of Class A Shares or (C) for
determining rights to vote with respect to any Fundamental Transaction, dissolution or liquidation, provided in each case that
such information shall be made known to the public prior to or in conjunction with such notice being provided to the Holder and
(iii) at least ten (10) Trading Days prior to the consummation of any Fundamental Transaction. To the extent that any notice provided
hereunder constitutes, or contains, material, non-public information regarding the Company or any of its Subsidiaries, the Company
shall simultaneously file such notice with the Securities and Exchange Commission (the “SEC”) pursuant to a
Current Report on Form 8-K. It is expressly understood and agreed that the time of execution specified by the Holder in each Exercise
Notice shall be definitive and may not be disputed or challenged by the Company.


 


(b) Currency.
All amounts owing under this Warrant that, in accordance with their terms, are paid in cash shall be paid in United States dollars
(“U.S. Dollars”). All amounts denominated in other currencies (if any) shall be converted into the U.S. Dollar
equivalent amount in accordance with the Exchange Rate on the date of calculation. “Exchange Rate” means, in
relation to any amount of currency to be converted into U.S. Dollars pursuant to this Warrant, the U.S. Dollar exchange rate as
published in the Wall Street Journal on the relevant date of calculation (it being understood and agreed that where an amount is
calculated with reference to, or over, a period of time, the date of calculation shall be the final date of such period of time).


 






    10


     


    

 


(c) Payments.
Whenever any payment is to be made by the Company to any Person pursuant to this Warrant, such payment shall be made in lawful
money of the United States of America via wire transfer of U.S. Dollars in immediately available funds in accordance with the Holder’s
wire transfer instructions delivered to the Company on or prior to such payment date or, in the absence of such instructions, by
a certified check drawn on the account of the Company and sent via overnight courier service to such Person at such address as
previously provided to the Company in writing.


 


9. AMENDMENT AND WAIVER. Except as otherwise provided herein, the provisions of this Warrant may be amended
and the Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if
the Company has obtained the written consent of the Holder. The Holder shall be entitled, at its option, to the benefit of any
amendment of any other similar warrant. No consideration shall be offered or paid to the Holder to amend or consent to a waiver
or modification of any provision of this Warrant unless the same consideration is also offered to all of the holders of any other
similar warrant. No waiver shall be effective unless it is in writing and signed by an authorized representative of the waiving
party.


 


10. SEVERABILITY.
If any provision of this Warrant is prohibited by law or otherwise determined to be invalid or unenforceable by a court of competent
jurisdiction, the provision that would otherwise be prohibited, invalid or unenforceable shall be deemed amended to apply to the
broadest extent that it would be valid and enforceable, and the invalidity or unenforceability of such provision shall not affect
the validity of the remaining provisions of this Warrant so long as this Warrant as so modified continues to express, without
material change, the original intentions of the parties as to the subject matter hereof and the prohibited nature, invalidity
or unenforceability of the provision(s) in question does not substantially impair the respective expectations or reciprocal obligations
of the parties or the practical realization of the benefits that would otherwise be conferred upon the parties. The parties will
endeavor in good faith negotiations to replace the prohibited, invalid or unenforceable provision(s) with a valid provision(s),
the effect of which comes as close as possible to that of the prohibited, invalid or unenforceable provision(s).


 


11.
GOVERNING LAW. This Warrant shall be governed by and construed and enforced in accordance with, and all questions
concerning the construction, validity, interpretation and performance of this Warrant shall be governed by, the internal laws of
the State of New York, without giving effect to any choice of law or conflict of law provision or rule (whether of the State of
New York or any other jurisdictions) that would cause the application of the laws of any jurisdiction other than the State of New
York. The Company hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts sitting in The City
of New York, Borough of Manhattan, for the adjudication of any dispute hereunder or in connection herewith or with any transaction
contemplated hereby or discussed herein, and hereby irrevocably waives, and agrees not to assert in any suit, action or proceeding,
any claim that it is not personally subject to the jurisdiction of any such court, that such suit, action or proceeding is brought
in an inconvenient forum or that the venue of such suit, action or proceeding is improper. Nothing contained herein shall be deemed
to limit in any way any right to serve process in any manner permitted by law. Nothing contained herein shall be deemed or operate
to preclude the Holder from bringing suit or taking other legal action against the Company in any other jurisdiction to collect
on the Company’s obligations to the Holder or to enforce a judgment or other court ruling in favor of the Holder. Nothing
contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. THE COMPANY
HEREBY IRREVOCABLY WAIVES ANY RIGHT IT MAY HAVE TO, AND AGREES NOT TO REQUEST, A JURY TRIAL FOR THE ADJUDICATION OF ANY DISPUTE
HEREUNDER OR IN CONNECTION WITH OR ARISING OUT OF THIS WARRANT OR ANY TRANSACTION CONTEMPLATED HEREBY.


 






    11


     


    

 


12.
JUDGMENT CURRENCY.


 


(a) If for
the purpose of obtaining or enforcing judgment against the Company in any court in any jurisdiction it becomes necessary to convert
into any other currency (such other currency being hereinafter in this Section 12 referred to as the “Judgment Currency”)
an amount due in U.S. Dollars under this Warrant, the conversion shall be made at the Exchange Rate prevailing on the Trading Day
immediately preceding:


 


(i) the date actual payment of the amount due, in the case of any proceeding in the courts of New York or in the courts of any other
jurisdiction that will give effect to such conversion being made on such date: or


 


(ii) the
date on which the foreign court determines, in the case of any proceeding in the courts of any other jurisdiction (the date as
of which such conversion is made pursuant to this Section 12(a)(ii) being hereinafter referred to as the “Judgment Conversion
Date”).


 


(b) If in
the case of any proceeding in the court of any jurisdiction referred to in Section 12(a)(ii) above, there is a change in the Exchange
Rate prevailing between the Judgment Conversion Date and the date of actual payment of the amount due, the applicable party shall
pay such adjusted amount as may be necessary to ensure that the amount paid in the Judgment Currency, when converted at the Exchange
Rate prevailing the date of payment, will produce the amount of U.S. Dollars which could have been purchased with the amount of
Judgment Currency stipulated in the judgment or judicial order at the Exchange Rate prevailing on the Judgment Conversion Date.


 


(c) Any amount
due from the Company under this provision shall be due as a separate debt and shall not be affected by judgment being obtained
for any other amounts due under or in respect of this Warrant.


 


13.
CONSTRUCTION; HEADINGS. This Warrant shall be deemed to be jointly drafted by the Company and the Holder and shall
not be construed against any Person as the drafter hereof. The headings of this Warrant are for convenience of reference and shall
not form part of, or affect the interpretation of, this Warrant. Terms used in this Warrant but defined in the other Transaction
Documents shall have the meanings ascribed to such terms on the Closing Date in such other Transaction Documents unless otherwise
consented to in writing by the Holder.


 






    12


     


    

 


14.
DISPUTE RESOLUTION. In the case of a dispute as to the determination of the Exercise Price or fair market value or
the arithmetic calculation of the Warrant Shares (as the case may be), the Company or the Holder (as the case may be) shall submit
the disputed determinations or arithmetic calculations (as the case may be) via facsimile or email (a) within two (2) Business
Days after receipt of the applicable notice giving rise to such dispute to the Company or the Holder (as the case may be) or (b)
if no notice gave rise to such dispute, at any time after the Holder learned of the circumstances giving rise to such dispute (including,
without limitation, as to whether any issuance or sale or deemed issuance or sale was an issuance or sale or deemed issuance or
sale of Excluded Securities). If the Holder and the Company are unable to agree upon such determination or calculation (as the
case may be) of the Exercise Price, or fair market value or the number of Warrant Shares (as the case may be) within three (3)
Business Days of such disputed determination or arithmetic calculation being submitted to the Company or the Holder (as the case
may be), then the Company shall, within two (2) Business Days submit via facsimile or email (i) the disputed determination of the
Exercise Price, the Closing Sale Price, the Bid Price or fair market value (as the case may be) to an independent, reputable investment
bank mutually selected by the parties or (ii) the disputed arithmetic calculation of the Warrant Shares to the Company’s
independent, outside accountant. The Company shall cause at its expense the investment bank or the accountant (as the case may
be) to perform the determinations or calculations (as the case may be) and notify the Company and the Holder of the results no
later than ten (10) Business Days from the time it receives such disputed determinations or calculations (as the case may be).
Such investment bank’s or accountant’s determination or calculation (as the case may be) shall be binding upon all
parties absent demonstrable error.


 


15.
REMEDIES, CHARACTERIZATION, OTHER OBLIGATIONS, BREACHES AND INJUNCTIVE RELIEF. The remedies provided in this Warrant
shall be cumulative and in addition to all other remedies available under this Warrant and the other Transaction Documents, at
law or in equity (including a decree of specific performance and/or other injunctive relief), and nothing herein shall limit the
right of the Holder to pursue actual damages for any failure by the Company to comply with the terms of this Warrant. The Company
covenants to the Holder that there shall be no characterization concerning this instrument other than as expressly provided herein.
Amounts set forth or provided for herein with respect to payments, exercises and the like (and the computation thereof) shall be
the amounts to be received by the Holder and shall not, except as expressly provided herein, be subject to any other obligation
of the Company (or the performance thereof). The Company acknowledges that a breach by it of its obligations hereunder will cause
irreparable harm to the Holder and that the remedy at law for any such breach may be inadequate. The Company therefore agrees that,
in the event of any such breach or threatened breach, the holder of this Warrant shall be entitled, in addition to all other available
remedies, to an injunction restraining any breach, without the necessity of showing economic loss and without any bond or other
security being required. The Company shall provide all information and documentation to the Holder that is requested by the Holder
to enable the Holder to confirm the Company’s compliance with the terms and conditions of this Warrant (including, without
limitation, compliance with Section 2 hereof). The issuance of shares and certificates for shares as contemplated hereby upon the
exercise of this Warrant shall be made without charge to the Holder or such shares for any issuance tax or other costs in respect
thereof, provided that the Company shall not be required to pay any tax which may be payable in respect of any transfer involved
in the issuance and delivery of any certificate in a name other than the Holder or its agent on its behalf.


 






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16.
TRANSFER. This Warrant may be offered for sale, sold, transferred or assigned without the consent of the Company.


 


17.
CERTAIN DEFINITIONS. For purposes of this Warrant, the following terms shall have the following meanings:


 


(a) “Adjustment
Right” means any right granted with respect to any securities issued in connection with, or with respect to, any issuance
or sale of shares of Class A Shares (other than rights of the type described in Section 3 and 4 hereof) that could result
in a decrease in the net consideration received by the Company in connection with, or with respect to, such securities (including,
without limitation, any cash settlement rights, cash adjustment or other similar rights).


 


(b) “Affiliate”
means any Person that, directly or indirectly through one or more intermediaries, controls or is controlled by or is under common
control with a Person as such terms are used in and construed under Rule 405 under the Securities Act of 1933, as amended (the
“Securities Act”).


 


(c) “Bloomberg”
means Bloomberg, L.P.


 


(d) “Business
Day” means any day other than Saturday, Sunday or other day on which commercial banks in The City of New York are authorized
or required by law to remain closed.


 


(e) “Closing
Sale Price” means, for any security as of any date, the last closing trade price for such security on the Eligible Market,
as reported by Bloomberg, or, if the Eligible Market begins to operate on an extended hours basis and does not designate the closing
trade price, then the last trade price of such security prior to 4:00 p.m., New York time, as reported by Bloomberg, or, if the
Eligible Market is not the principal securities exchange or trading market for such security, the last trade price of such security
on the principal securities exchange or trading market where such security is listed or traded as reported by Bloomberg, or if
the foregoing does not apply, the last trade price of such security in the over-the-counter market on the electronic bulletin board
for such security as reported by Bloomberg, or, if no last trade price is reported for such security by Bloomberg, the average
of the ask prices of any market makers for such security as reported in the “pink sheets” by Pink Sheets LLC (formerly
the National Quotation Bureau, Inc.). If the Closing Sale Price cannot be calculated for a security on a particular date on any
of the foregoing bases, the Closing Sale Price of such security on such date shall be the fair market value as mutually determined
by the Company and the Holder. If the Company and the Holder are unable to agree upon the fair market value of such security, then
such dispute shall be resolved in accordance with the procedures in Section 14. All such determinations shall be appropriately
adjusted for any stock dividend, stock split, stock combination or other similar transaction during such period.


 


(f) “Class
A Shares” means (i) the Company’s shares of Class A Shares, USD$1.00 par value per share, and (ii) any capital
stock into which such Class A Shares shall have been changed or any share capital resulting from a reclassification of such Class
A Shares.


 


(g) “Convertible
Securities” means any stock or other security (other than Options) that is at any time and under any circumstances, directly
or indirectly, convertible into, exercisable or exchangeable for, or which otherwise entitles the holder thereof to acquire, any
shares of Class A Shares.


 






    14


     


    

 


(h) “Eligible
Market” means The New York Stock Exchange, the NYSE American, the Nasdaq Global Select Market, the Nasdaq Global Market
or the Nasdaq Capital Market.


 


(i)  
“Expiration Date” means the date that is two and one half years from the Issuance Date, or, if such date falls
on a day other than a Business Day or on which trading does not take place on the Eligible Market (a “Holiday”),
the next date that is not a Holiday.


 


(j)  
“FINRA” means the Financial Industry Regulatory Authority, Inc. in the United States.


 


(k) “Fundamental
Transaction” means that (i) the Company or any of its Subsidiaries shall, directly or indirectly, in one or more related
transactions, (A) consolidate or merge with or into (whether or not the Company or any of its Subsidiaries is the surviving corporation)
any other Person, or (B) sell, lease, license, assign, transfer, convey or otherwise dispose of all or substantially all of its
respective properties or assets to any other Person, or (C) allow any other Person to make a purchase, tender or exchange offer
that is accepted by the holders of more than 50% of the outstanding shares of Voting Stock of the Company (not including any shares
of Voting Stock of the Company held by the Person or Persons making or party to, or associated or affiliated with the Persons making
or party to, such purchase, tender or exchange offer), or (D) consummate a stock or share purchase agreement or other business
combination (including, without limitation, a reorganization, recapitalization, spin-off or scheme of arrangement) with any other
Person whereby such other Person acquires more than 50% of the outstanding shares of Voting Stock of the Company (not including
any shares of Voting Stock of the Company held by the other Person or other Persons making or party to, or associated or affiliated
with the other Persons making or party to, such stock or share purchase agreement or other business combination), or (E) (1) reorganize,
recapitalize or reclassify the Class A Shares, (2) effect or consummate a stock combination, reverse stock split or other similar
transaction involving the Class A Shares or (3) make any public announcement or disclosure with respect to any stock combination,
reverse stock split or other similar transaction involving the Class A Shares (including, without limitation, any public announcement
or disclosure of (a) any potential, possible or actual stock combination, reverse stock split or other similar transaction involving
the Class A Shares or (b) board or stockholder approval thereof, or the intention of the Company to seek board or stockholder approval
of any stock combination, reverse stock split or other similar transaction involving the Class A Shares), or (ii) any “person”
or “group” (as these terms are used for purposes of Sections 13(d) and 14(d) of the 1934 Act and the rules and regulations
promulgated thereunder) is or shall become the “beneficial owner” (as defined in Rule 13d-3 under the 1934 Act), directly
or indirectly, of 50% of the aggregate ordinary voting power represented by issued and outstanding Voting Stock of the Company.


 


(l)
“Options” means any rights, warrants or options to subscribe for or purchase shares of Class A Shares or
Convertible Securities.


 


(m) “Parent Entity” of a Person means an entity that, directly or indirectly, controls the applicable Person and
whose Class A Shares or equivalent equity security is quoted or listed on an Eligible Market, or, if there is more than one such
Person or Parent Entity, the Person or Parent Entity with the largest public market capitalization as of the date of consummation
of the Fundamental Transaction.


 






    15


     


    

 


(n) “Person”
means an individual, a limited liability company, a partnership, a joint venture, a corporation, a trust, an unincorporated organization,
any other entity or a government or any department or agency thereof.


 


(o) “SEC”
means the United States Securities and Exchange Commission.


 


(p) “Successor
Entity” means the Person (or, if so elected by the Holder, the Parent Entity) formed by, resulting from or surviving
any Fundamental Transaction or the Person (or, if so elected by the Holder, the Parent Entity) with which such Fundamental Transaction
shall have been entered into.


 


(q) “Trading
Day” means any day on which the Class A Shares is traded on the Eligible Market, or, if the Eligible Market is not the
principal trading market for the Class A Shares, then on the principal securities exchange or securities market on which the Class
A Shares is then traded, provided that “Trading Day” shall not include any day on which the Class A Shares is scheduled
to trade on such exchange or market for less than 4.5 hours or any day that the Class A Shares is suspended from trading during
the final hour of trading on such exchange or market (or if such exchange or market does not designate in advance the closing time
of trading on such exchange or market, then during the hour ending at 4:00 p.m., New York time) unless such day is otherwise designated
as a Trading Day in writing by the Holder.


 


(r) “Voting
Stock” of a Person means capital stock of such Person of the class or classes pursuant to which the holders thereof have
the general voting power to elect, or the general power to appoint, at least a majority of the board of directors, managers or
trustees of such Person (irrespective of whether or not at the time capital stock of any other class or classes shall have or might
have voting power by reason of the happening of any contingency).


 


18.
Registration Rights.

 


Participation in Registrations. The issuance
of the Warrant and resale of the Warrant Shares shall be registered in the registration statement on Form F-1 the Company is currently
preparing and submitting to the SEC for its planned IPO. Following an IPO, whenever the Company proposes to register any of its
securities under the Securities Act, whether for its own account or for the account of another stockholder (except for the registration
of securities (A) to be offered pursuant to an employee benefit plan on Form S-8 or (B) pursuant to a registration made on Form
S-4, or any successor forms then in effect) at any time and the registration form to be used may be used for the registration of
the Warrant Shares (a “Piggyback Registration”), it will so notify in writing the Holder no later than the earlier
to occur of (i) the tenth (10th) day following the Company’s receipt of notice of exercise of other demand registration rights,
or (ii) thirty (30) days prior to the anticipated filing date. The Company will include in the Piggyback Registration all Warrant
Shares, on a pro rata basis based upon the total number of registrable securities with respect to which the Company has received
written requests for inclusion within fifteen (15) business days after the applicable holder’s receipt of the Company’s
notice.


 


[signature page follows]


 






    16


     


    

 


IN WITNESS WHEREOF,
the Company has caused this Warrant to Purchase Class A Shares to be duly executed as of the Issuance Date set out above.


 


	
        APTORUM GROUP LIMITED

        a Cayman Islands company

         



 


	By:	 	 
	Name:	Ian Huen	 
	Title:	Chief Executive Officer and Executive Director	 



 



     


     


    

 


EXHIBIT A


 


EXERCISE NOTICE


 


TO BE EXECUTED BY THE REGISTERED HOLDER
TO EXERCISE THIS


WARRANT TO PURCHASE CLASS A SHARES


 


APTORUM GROUP LIMITED


 


The undersigned holder
hereby exercises the right to purchase _________________ Class A Shares (“Warrant Shares”) of APTORUM GROUP
LIMITED, a Cayman Islands corporation (the “Company”), evidenced by Warrant to Purchase Class A Shares No.
_______ (the “Warrant”). Capitalized terms used herein and not otherwise defined shall have the respective meanings
set forth in the Warrant.


 


1. Form
of Exercise Price. The Holder intends that payment of the Exercise Price shall be made as:


 


		____________	a “Cash Exercise” with respect to _________________ Warrant Shares; and/or



 


		____________	a “Cashless Exercise” with respect to _______________ Warrant Shares.



 


In the event that the
Holder has elected a Cashless Exercise with respect to some or all of the Warrant Shares to be issued pursuant hereto, the Holder
hereby represents and warrants that (i) this Exercise Notice was executed by the Holder at __________ [a.m.][p.m.] on the date
set forth below and (ii) if applicable, the 20-day average closing price per share as of such time of execution of this Exercise
Notice was $________.]


 


1. Form
of Exercise Price. The Holder intends that payment of the Exercise Price shall be made as a “Cash Exercise”.]


 


2. Payment
of Exercise Price. In the event that the Holder has elected a Cash Exercise with respect to some or all of the Warrant Shares
to be issued pursuant hereto, the Holder shall pay the Aggregate Exercise Price in the sum of $___________________ to the Company
in accordance with the terms of the Warrant.


 


3. Delivery
of Warrant Shares. The Company shall deliver to Holder, or its designee or agent as specified below, __________ Warrant Shares
in accordance with the terms of the Warrant. Delivery shall be made to Holder, or for its benefit, as follows:


 


☐
  Check here if requesting delivery as a certificate to the following name and to the following address:


 


	 	Issue to:	 
	 	 	 
	 	 	 


  


☐
  Check here if requesting delivery by Deposit/Withdrawal at Custodian as follows:


 


	 	DTC Participant:	 
	 	DTC Number:	 
	 	Account Number:	 
	 	 	 
	 	 	 	 





	
        Date: _____________ __, 
	 
	 	 
	 	 
	Name of Registered Holder	 



 





	By:	 	 
		Name:	 	 
		Title:	 	 
	 	 	 	 
		Tax ID:	 	 
	 	 	 	 
	 	Facsimile:	 	 



 






     


     


    

 




EXHIBIT B


 


ACKNOWLEDGMENT


 


The Company hereby
acknowledges this Exercise Notice and hereby directs ______________ to issue the above indicated number of shares of Class A Shares
in accordance with the Transfer Agent Instructions dated _________, 20__, from the Company and acknowledged and agreed to by _______________.


 





	 	APTORUM GROUP LIMITED
	 	 	 
	 	By:	 
	 	 	Name:
	 	 	Title: